Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /*****************************************************************************/ |
| 2 | |
| 3 | /* |
| 4 | * stallion.c -- stallion multiport serial driver. |
| 5 | * |
| 6 | * Copyright (C) 1996-1999 Stallion Technologies |
| 7 | * Copyright (C) 1994-1996 Greg Ungerer. |
| 8 | * |
| 9 | * This code is loosely based on the Linux serial driver, written by |
| 10 | * Linus Torvalds, Theodore T'so and others. |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | */ |
| 26 | |
| 27 | /*****************************************************************************/ |
| 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/interrupt.h> |
| 32 | #include <linux/tty.h> |
| 33 | #include <linux/tty_flip.h> |
| 34 | #include <linux/serial.h> |
| 35 | #include <linux/cd1400.h> |
| 36 | #include <linux/sc26198.h> |
| 37 | #include <linux/comstats.h> |
| 38 | #include <linux/stallion.h> |
| 39 | #include <linux/ioport.h> |
| 40 | #include <linux/init.h> |
| 41 | #include <linux/smp_lock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <linux/device.h> |
| 43 | #include <linux/delay.h> |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 44 | #include <linux/ctype.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | #include <asm/io.h> |
| 47 | #include <asm/uaccess.h> |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <linux/pci.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | /*****************************************************************************/ |
| 52 | |
| 53 | /* |
| 54 | * Define different board types. Use the standard Stallion "assigned" |
| 55 | * board numbers. Boards supported in this driver are abbreviated as |
| 56 | * EIO = EasyIO and ECH = EasyConnection 8/32. |
| 57 | */ |
| 58 | #define BRD_EASYIO 20 |
| 59 | #define BRD_ECH 21 |
| 60 | #define BRD_ECHMC 22 |
| 61 | #define BRD_ECHPCI 26 |
| 62 | #define BRD_ECH64PCI 27 |
| 63 | #define BRD_EASYIOPCI 28 |
| 64 | |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 65 | struct stlconf { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | int brdtype; |
| 67 | int ioaddr1; |
| 68 | int ioaddr2; |
| 69 | unsigned long memaddr; |
| 70 | int irq; |
| 71 | int irqtype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | }; |
| 73 | |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 74 | static unsigned int stl_nrbrds; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
| 76 | /*****************************************************************************/ |
| 77 | |
| 78 | /* |
| 79 | * Define some important driver characteristics. Device major numbers |
| 80 | * allocated as per Linux Device Registry. |
| 81 | */ |
| 82 | #ifndef STL_SIOMEMMAJOR |
| 83 | #define STL_SIOMEMMAJOR 28 |
| 84 | #endif |
| 85 | #ifndef STL_SERIALMAJOR |
| 86 | #define STL_SERIALMAJOR 24 |
| 87 | #endif |
| 88 | #ifndef STL_CALLOUTMAJOR |
| 89 | #define STL_CALLOUTMAJOR 25 |
| 90 | #endif |
| 91 | |
| 92 | /* |
| 93 | * Set the TX buffer size. Bigger is better, but we don't want |
| 94 | * to chew too much memory with buffers! |
| 95 | */ |
| 96 | #define STL_TXBUFLOW 512 |
| 97 | #define STL_TXBUFSIZE 4096 |
| 98 | |
| 99 | /*****************************************************************************/ |
| 100 | |
| 101 | /* |
| 102 | * Define our local driver identity first. Set up stuff to deal with |
| 103 | * all the local structures required by a serial tty driver. |
| 104 | */ |
| 105 | static char *stl_drvtitle = "Stallion Multiport Serial Driver"; |
| 106 | static char *stl_drvname = "stallion"; |
| 107 | static char *stl_drvversion = "5.6.0"; |
| 108 | |
| 109 | static struct tty_driver *stl_serial; |
| 110 | |
| 111 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | * Define a local default termios struct. All ports will be created |
| 113 | * with this termios initially. Basically all it defines is a raw port |
| 114 | * at 9600, 8 data bits, 1 stop bit. |
| 115 | */ |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 116 | static struct ktermios stl_deftermios = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), |
| 118 | .c_cc = INIT_C_CC, |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 119 | .c_ispeed = 9600, |
| 120 | .c_ospeed = 9600, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | }; |
| 122 | |
| 123 | /* |
| 124 | * Define global stats structures. Not used often, and can be |
| 125 | * re-used for each stats call. |
| 126 | */ |
| 127 | static comstats_t stl_comstats; |
| 128 | static combrd_t stl_brdstats; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 129 | static struct stlbrd stl_dummybrd; |
| 130 | static struct stlport stl_dummyport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
| 132 | /* |
| 133 | * Define global place to put buffer overflow characters. |
| 134 | */ |
| 135 | static char stl_unwanted[SC26198_RXFIFOSIZE]; |
| 136 | |
| 137 | /*****************************************************************************/ |
| 138 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 139 | static struct stlbrd *stl_brds[STL_MAXBRDS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | /* |
| 142 | * Per board state flags. Used with the state field of the board struct. |
| 143 | * Not really much here! |
| 144 | */ |
| 145 | #define BRD_FOUND 0x1 |
| 146 | |
| 147 | /* |
| 148 | * Define the port structure istate flags. These set of flags are |
| 149 | * modified at interrupt time - so setting and reseting them needs |
| 150 | * to be atomic. Use the bit clear/setting routines for this. |
| 151 | */ |
| 152 | #define ASYI_TXBUSY 1 |
| 153 | #define ASYI_TXLOW 2 |
| 154 | #define ASYI_DCDCHANGE 3 |
| 155 | #define ASYI_TXFLOWED 4 |
| 156 | |
| 157 | /* |
| 158 | * Define an array of board names as printable strings. Handy for |
| 159 | * referencing boards when printing trace and stuff. |
| 160 | */ |
| 161 | static char *stl_brdnames[] = { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 162 | NULL, |
| 163 | NULL, |
| 164 | NULL, |
| 165 | NULL, |
| 166 | NULL, |
| 167 | NULL, |
| 168 | NULL, |
| 169 | NULL, |
| 170 | NULL, |
| 171 | NULL, |
| 172 | NULL, |
| 173 | NULL, |
| 174 | NULL, |
| 175 | NULL, |
| 176 | NULL, |
| 177 | NULL, |
| 178 | NULL, |
| 179 | NULL, |
| 180 | NULL, |
| 181 | NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | "EasyIO", |
| 183 | "EC8/32-AT", |
| 184 | "EC8/32-MC", |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 185 | NULL, |
| 186 | NULL, |
| 187 | NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | "EC8/32-PCI", |
| 189 | "EC8/64-PCI", |
| 190 | "EasyIO-PCI", |
| 191 | }; |
| 192 | |
| 193 | /*****************************************************************************/ |
| 194 | |
| 195 | /* |
| 196 | * Define some string labels for arguments passed from the module |
| 197 | * load line. These allow for easy board definitions, and easy |
| 198 | * modification of the io, memory and irq resoucres. |
| 199 | */ |
| 200 | static int stl_nargs = 0; |
| 201 | static char *board0[4]; |
| 202 | static char *board1[4]; |
| 203 | static char *board2[4]; |
| 204 | static char *board3[4]; |
| 205 | |
| 206 | static char **stl_brdsp[] = { |
| 207 | (char **) &board0, |
| 208 | (char **) &board1, |
| 209 | (char **) &board2, |
| 210 | (char **) &board3 |
| 211 | }; |
| 212 | |
| 213 | /* |
| 214 | * Define a set of common board names, and types. This is used to |
| 215 | * parse any module arguments. |
| 216 | */ |
| 217 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 218 | static struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | char *name; |
| 220 | int type; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 221 | } stl_brdstr[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | { "easyio", BRD_EASYIO }, |
| 223 | { "eio", BRD_EASYIO }, |
| 224 | { "20", BRD_EASYIO }, |
| 225 | { "ec8/32", BRD_ECH }, |
| 226 | { "ec8/32-at", BRD_ECH }, |
| 227 | { "ec8/32-isa", BRD_ECH }, |
| 228 | { "ech", BRD_ECH }, |
| 229 | { "echat", BRD_ECH }, |
| 230 | { "21", BRD_ECH }, |
| 231 | { "ec8/32-mc", BRD_ECHMC }, |
| 232 | { "ec8/32-mca", BRD_ECHMC }, |
| 233 | { "echmc", BRD_ECHMC }, |
| 234 | { "echmca", BRD_ECHMC }, |
| 235 | { "22", BRD_ECHMC }, |
| 236 | { "ec8/32-pc", BRD_ECHPCI }, |
| 237 | { "ec8/32-pci", BRD_ECHPCI }, |
| 238 | { "26", BRD_ECHPCI }, |
| 239 | { "ec8/64-pc", BRD_ECH64PCI }, |
| 240 | { "ec8/64-pci", BRD_ECH64PCI }, |
| 241 | { "ech-pci", BRD_ECH64PCI }, |
| 242 | { "echpci", BRD_ECH64PCI }, |
| 243 | { "echpc", BRD_ECH64PCI }, |
| 244 | { "27", BRD_ECH64PCI }, |
| 245 | { "easyio-pc", BRD_EASYIOPCI }, |
| 246 | { "easyio-pci", BRD_EASYIOPCI }, |
| 247 | { "eio-pci", BRD_EASYIOPCI }, |
| 248 | { "eiopci", BRD_EASYIOPCI }, |
| 249 | { "28", BRD_EASYIOPCI }, |
| 250 | }; |
| 251 | |
| 252 | /* |
| 253 | * Define the module agruments. |
| 254 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | module_param_array(board0, charp, &stl_nargs, 0); |
| 257 | MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 258 | module_param_array(board1, charp, &stl_nargs, 0); |
| 259 | MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 260 | module_param_array(board2, charp, &stl_nargs, 0); |
| 261 | MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 262 | module_param_array(board3, charp, &stl_nargs, 0); |
| 263 | MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 264 | |
| 265 | /*****************************************************************************/ |
| 266 | |
| 267 | /* |
| 268 | * Hardware ID bits for the EasyIO and ECH boards. These defines apply |
| 269 | * to the directly accessible io ports of these boards (not the uarts - |
| 270 | * they are in cd1400.h and sc26198.h). |
| 271 | */ |
| 272 | #define EIO_8PORTRS 0x04 |
| 273 | #define EIO_4PORTRS 0x05 |
| 274 | #define EIO_8PORTDI 0x00 |
| 275 | #define EIO_8PORTM 0x06 |
| 276 | #define EIO_MK3 0x03 |
| 277 | #define EIO_IDBITMASK 0x07 |
| 278 | |
| 279 | #define EIO_BRDMASK 0xf0 |
| 280 | #define ID_BRD4 0x10 |
| 281 | #define ID_BRD8 0x20 |
| 282 | #define ID_BRD16 0x30 |
| 283 | |
| 284 | #define EIO_INTRPEND 0x08 |
| 285 | #define EIO_INTEDGE 0x00 |
| 286 | #define EIO_INTLEVEL 0x08 |
| 287 | #define EIO_0WS 0x10 |
| 288 | |
| 289 | #define ECH_ID 0xa0 |
| 290 | #define ECH_IDBITMASK 0xe0 |
| 291 | #define ECH_BRDENABLE 0x08 |
| 292 | #define ECH_BRDDISABLE 0x00 |
| 293 | #define ECH_INTENABLE 0x01 |
| 294 | #define ECH_INTDISABLE 0x00 |
| 295 | #define ECH_INTLEVEL 0x02 |
| 296 | #define ECH_INTEDGE 0x00 |
| 297 | #define ECH_INTRPEND 0x01 |
| 298 | #define ECH_BRDRESET 0x01 |
| 299 | |
| 300 | #define ECHMC_INTENABLE 0x01 |
| 301 | #define ECHMC_BRDRESET 0x02 |
| 302 | |
| 303 | #define ECH_PNLSTATUS 2 |
| 304 | #define ECH_PNL16PORT 0x20 |
| 305 | #define ECH_PNLIDMASK 0x07 |
| 306 | #define ECH_PNLXPID 0x40 |
| 307 | #define ECH_PNLINTRPEND 0x80 |
| 308 | |
| 309 | #define ECH_ADDR2MASK 0x1e0 |
| 310 | |
| 311 | /* |
| 312 | * Define the vector mapping bits for the programmable interrupt board |
| 313 | * hardware. These bits encode the interrupt for the board to use - it |
| 314 | * is software selectable (except the EIO-8M). |
| 315 | */ |
| 316 | static unsigned char stl_vecmap[] = { |
| 317 | 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, |
| 318 | 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 |
| 319 | }; |
| 320 | |
| 321 | /* |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 322 | * Lock ordering is that you may not take stallion_lock holding |
| 323 | * brd_lock. |
| 324 | */ |
| 325 | |
| 326 | static spinlock_t brd_lock; /* Guard the board mapping */ |
| 327 | static spinlock_t stallion_lock; /* Guard the tty driver */ |
| 328 | |
| 329 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | * Set up enable and disable macros for the ECH boards. They require |
| 331 | * the secondary io address space to be activated and deactivated. |
| 332 | * This way all ECH boards can share their secondary io region. |
| 333 | * If this is an ECH-PCI board then also need to set the page pointer |
| 334 | * to point to the correct page. |
| 335 | */ |
| 336 | #define BRDENABLE(brdnr,pagenr) \ |
| 337 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ |
| 338 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ |
| 339 | stl_brds[(brdnr)]->ioctrl); \ |
| 340 | else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ |
| 341 | outb((pagenr), stl_brds[(brdnr)]->ioctrl); |
| 342 | |
| 343 | #define BRDDISABLE(brdnr) \ |
| 344 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ |
| 345 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ |
| 346 | stl_brds[(brdnr)]->ioctrl); |
| 347 | |
| 348 | #define STL_CD1400MAXBAUD 230400 |
| 349 | #define STL_SC26198MAXBAUD 460800 |
| 350 | |
| 351 | #define STL_BAUDBASE 115200 |
| 352 | #define STL_CLOSEDELAY (5 * HZ / 10) |
| 353 | |
| 354 | /*****************************************************************************/ |
| 355 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | /* |
| 357 | * Define the Stallion PCI vendor and device IDs. |
| 358 | */ |
| 359 | #ifndef PCI_VENDOR_ID_STALLION |
| 360 | #define PCI_VENDOR_ID_STALLION 0x124d |
| 361 | #endif |
| 362 | #ifndef PCI_DEVICE_ID_ECHPCI832 |
| 363 | #define PCI_DEVICE_ID_ECHPCI832 0x0000 |
| 364 | #endif |
| 365 | #ifndef PCI_DEVICE_ID_ECHPCI864 |
| 366 | #define PCI_DEVICE_ID_ECHPCI864 0x0002 |
| 367 | #endif |
| 368 | #ifndef PCI_DEVICE_ID_EIOPCI |
| 369 | #define PCI_DEVICE_ID_EIOPCI 0x0003 |
| 370 | #endif |
| 371 | |
| 372 | /* |
| 373 | * Define structure to hold all Stallion PCI boards. |
| 374 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 376 | static struct pci_device_id stl_pcibrds[] = { |
| 377 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864), |
| 378 | .driver_data = BRD_ECH64PCI }, |
| 379 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI), |
| 380 | .driver_data = BRD_EASYIOPCI }, |
| 381 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832), |
| 382 | .driver_data = BRD_ECHPCI }, |
| 383 | { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410), |
| 384 | .driver_data = BRD_ECHPCI }, |
| 385 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | }; |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 387 | MODULE_DEVICE_TABLE(pci, stl_pcibrds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
| 389 | /*****************************************************************************/ |
| 390 | |
| 391 | /* |
| 392 | * Define macros to extract a brd/port number from a minor number. |
| 393 | */ |
| 394 | #define MINOR2BRD(min) (((min) & 0xc0) >> 6) |
| 395 | #define MINOR2PORT(min) ((min) & 0x3f) |
| 396 | |
| 397 | /* |
| 398 | * Define a baud rate table that converts termios baud rate selector |
| 399 | * into the actual baud rate value. All baud rate calculations are |
| 400 | * based on the actual baud rate required. |
| 401 | */ |
| 402 | static unsigned int stl_baudrates[] = { |
| 403 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, |
| 404 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 |
| 405 | }; |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | /*****************************************************************************/ |
| 408 | |
| 409 | /* |
| 410 | * Declare all those functions in this driver! |
| 411 | */ |
| 412 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 414 | static int stl_brdinit(struct stlbrd *brdp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 415 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp); |
| 416 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 417 | static int stl_waitcarrier(struct stlport *portp, struct file *filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | /* |
| 420 | * CD1400 uart specific handling functions. |
| 421 | */ |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 422 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value); |
| 423 | static int stl_cd1400getreg(struct stlport *portp, int regnr); |
| 424 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value); |
| 425 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp); |
| 426 | static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 427 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 428 | static int stl_cd1400getsignals(struct stlport *portp); |
| 429 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts); |
| 430 | static void stl_cd1400ccrwait(struct stlport *portp); |
| 431 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx); |
| 432 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx); |
| 433 | static void stl_cd1400disableintrs(struct stlport *portp); |
| 434 | static void stl_cd1400sendbreak(struct stlport *portp, int len); |
| 435 | static void stl_cd1400flowctrl(struct stlport *portp, int state); |
| 436 | static void stl_cd1400sendflow(struct stlport *portp, int state); |
| 437 | static void stl_cd1400flush(struct stlport *portp); |
| 438 | static int stl_cd1400datastate(struct stlport *portp); |
| 439 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase); |
| 440 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase); |
| 441 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr); |
| 442 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr); |
| 443 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 445 | static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
| 447 | /* |
| 448 | * SC26198 uart specific handling functions. |
| 449 | */ |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 450 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value); |
| 451 | static int stl_sc26198getreg(struct stlport *portp, int regnr); |
| 452 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value); |
| 453 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr); |
| 454 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp); |
| 455 | static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 456 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 457 | static int stl_sc26198getsignals(struct stlport *portp); |
| 458 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts); |
| 459 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx); |
| 460 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx); |
| 461 | static void stl_sc26198disableintrs(struct stlport *portp); |
| 462 | static void stl_sc26198sendbreak(struct stlport *portp, int len); |
| 463 | static void stl_sc26198flowctrl(struct stlport *portp, int state); |
| 464 | static void stl_sc26198sendflow(struct stlport *portp, int state); |
| 465 | static void stl_sc26198flush(struct stlport *portp); |
| 466 | static int stl_sc26198datastate(struct stlport *portp); |
| 467 | static void stl_sc26198wait(struct stlport *portp); |
| 468 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty); |
| 469 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase); |
| 470 | static void stl_sc26198txisr(struct stlport *port); |
| 471 | static void stl_sc26198rxisr(struct stlport *port, unsigned int iack); |
| 472 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch); |
| 473 | static void stl_sc26198rxbadchars(struct stlport *portp); |
| 474 | static void stl_sc26198otherisr(struct stlport *port, unsigned int iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
| 476 | /*****************************************************************************/ |
| 477 | |
| 478 | /* |
| 479 | * Generic UART support structure. |
| 480 | */ |
| 481 | typedef struct uart { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 482 | int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp); |
| 483 | void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 484 | void (*setport)(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 485 | int (*getsignals)(struct stlport *portp); |
| 486 | void (*setsignals)(struct stlport *portp, int dtr, int rts); |
| 487 | void (*enablerxtx)(struct stlport *portp, int rx, int tx); |
| 488 | void (*startrxtx)(struct stlport *portp, int rx, int tx); |
| 489 | void (*disableintrs)(struct stlport *portp); |
| 490 | void (*sendbreak)(struct stlport *portp, int len); |
| 491 | void (*flowctrl)(struct stlport *portp, int state); |
| 492 | void (*sendflow)(struct stlport *portp, int state); |
| 493 | void (*flush)(struct stlport *portp); |
| 494 | int (*datastate)(struct stlport *portp); |
| 495 | void (*intr)(struct stlpanel *panelp, unsigned int iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } uart_t; |
| 497 | |
| 498 | /* |
| 499 | * Define some macros to make calling these functions nice and clean. |
| 500 | */ |
| 501 | #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) |
| 502 | #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) |
| 503 | #define stl_setport (* ((uart_t *) portp->uartp)->setport) |
| 504 | #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) |
| 505 | #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) |
| 506 | #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) |
| 507 | #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) |
| 508 | #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) |
| 509 | #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) |
| 510 | #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) |
| 511 | #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) |
| 512 | #define stl_flush (* ((uart_t *) portp->uartp)->flush) |
| 513 | #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) |
| 514 | |
| 515 | /*****************************************************************************/ |
| 516 | |
| 517 | /* |
| 518 | * CD1400 UART specific data initialization. |
| 519 | */ |
| 520 | static uart_t stl_cd1400uart = { |
| 521 | stl_cd1400panelinit, |
| 522 | stl_cd1400portinit, |
| 523 | stl_cd1400setport, |
| 524 | stl_cd1400getsignals, |
| 525 | stl_cd1400setsignals, |
| 526 | stl_cd1400enablerxtx, |
| 527 | stl_cd1400startrxtx, |
| 528 | stl_cd1400disableintrs, |
| 529 | stl_cd1400sendbreak, |
| 530 | stl_cd1400flowctrl, |
| 531 | stl_cd1400sendflow, |
| 532 | stl_cd1400flush, |
| 533 | stl_cd1400datastate, |
| 534 | stl_cd1400eiointr |
| 535 | }; |
| 536 | |
| 537 | /* |
| 538 | * Define the offsets within the register bank of a cd1400 based panel. |
| 539 | * These io address offsets are common to the EasyIO board as well. |
| 540 | */ |
| 541 | #define EREG_ADDR 0 |
| 542 | #define EREG_DATA 4 |
| 543 | #define EREG_RXACK 5 |
| 544 | #define EREG_TXACK 6 |
| 545 | #define EREG_MDACK 7 |
| 546 | |
| 547 | #define EREG_BANKSIZE 8 |
| 548 | |
| 549 | #define CD1400_CLK 25000000 |
| 550 | #define CD1400_CLK8M 20000000 |
| 551 | |
| 552 | /* |
| 553 | * Define the cd1400 baud rate clocks. These are used when calculating |
| 554 | * what clock and divisor to use for the required baud rate. Also |
| 555 | * define the maximum baud rate allowed, and the default base baud. |
| 556 | */ |
| 557 | static int stl_cd1400clkdivs[] = { |
| 558 | CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 |
| 559 | }; |
| 560 | |
| 561 | /*****************************************************************************/ |
| 562 | |
| 563 | /* |
| 564 | * SC26198 UART specific data initization. |
| 565 | */ |
| 566 | static uart_t stl_sc26198uart = { |
| 567 | stl_sc26198panelinit, |
| 568 | stl_sc26198portinit, |
| 569 | stl_sc26198setport, |
| 570 | stl_sc26198getsignals, |
| 571 | stl_sc26198setsignals, |
| 572 | stl_sc26198enablerxtx, |
| 573 | stl_sc26198startrxtx, |
| 574 | stl_sc26198disableintrs, |
| 575 | stl_sc26198sendbreak, |
| 576 | stl_sc26198flowctrl, |
| 577 | stl_sc26198sendflow, |
| 578 | stl_sc26198flush, |
| 579 | stl_sc26198datastate, |
| 580 | stl_sc26198intr |
| 581 | }; |
| 582 | |
| 583 | /* |
| 584 | * Define the offsets within the register bank of a sc26198 based panel. |
| 585 | */ |
| 586 | #define XP_DATA 0 |
| 587 | #define XP_ADDR 1 |
| 588 | #define XP_MODID 2 |
| 589 | #define XP_STATUS 2 |
| 590 | #define XP_IACK 3 |
| 591 | |
| 592 | #define XP_BANKSIZE 4 |
| 593 | |
| 594 | /* |
| 595 | * Define the sc26198 baud rate table. Offsets within the table |
| 596 | * represent the actual baud rate selector of sc26198 registers. |
| 597 | */ |
| 598 | static unsigned int sc26198_baudtable[] = { |
| 599 | 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, |
| 600 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, |
| 601 | 230400, 460800, 921600 |
| 602 | }; |
| 603 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 604 | #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
| 606 | /*****************************************************************************/ |
| 607 | |
| 608 | /* |
| 609 | * Define the driver info for a user level control device. Used mainly |
| 610 | * to get at port stats - only not using the port device itself. |
| 611 | */ |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 612 | static const struct file_operations stl_fsiomem = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | .owner = THIS_MODULE, |
| 614 | .ioctl = stl_memioctl, |
| 615 | }; |
| 616 | |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 617 | static struct class *stallion_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
| 619 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | * Check for any arguments passed in on the module load command line. |
| 621 | */ |
| 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | /*****************************************************************************/ |
| 624 | |
| 625 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | * Parse the supplied argument string, into the board conf struct. |
| 627 | */ |
| 628 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 629 | static int __init stl_parsebrd(struct stlconf *confp, char **argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | { |
| 631 | char *sp; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 632 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 634 | pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 636 | if ((argp[0] == NULL) || (*argp[0] == 0)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 637 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | |
| 639 | for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 640 | *sp = tolower(*sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 642 | for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | if (strcmp(stl_brdstr[i].name, argp[0]) == 0) |
| 644 | break; |
| 645 | } |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 646 | if (i == ARRAY_SIZE(stl_brdstr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | printk("STALLION: unknown board name, %s?\n", argp[0]); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 648 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | } |
| 650 | |
| 651 | confp->brdtype = stl_brdstr[i].type; |
| 652 | |
| 653 | i = 1; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 654 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 655 | confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | i++; |
| 657 | if (confp->brdtype == BRD_ECH) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 658 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 659 | confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | i++; |
| 661 | } |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 662 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 663 | confp->irq = simple_strtoul(argp[i], NULL, 0); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 664 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | |
| 667 | /*****************************************************************************/ |
| 668 | |
| 669 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | * Allocate a new board structure. Fill out the basic info in it. |
| 671 | */ |
| 672 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 673 | static struct stlbrd *stl_allocbrd(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 675 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 677 | brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 678 | if (!brdp) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 679 | printk("STALLION: failed to allocate memory (size=%Zd)\n", |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 680 | sizeof(struct stlbrd)); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 681 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | } |
| 683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | brdp->magic = STL_BOARDMAGIC; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 685 | return brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | } |
| 687 | |
| 688 | /*****************************************************************************/ |
| 689 | |
| 690 | static int stl_open(struct tty_struct *tty, struct file *filp) |
| 691 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 692 | struct stlport *portp; |
| 693 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | unsigned int minordev; |
| 695 | int brdnr, panelnr, portnr, rc; |
| 696 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 697 | pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | minordev = tty->index; |
| 700 | brdnr = MINOR2BRD(minordev); |
| 701 | if (brdnr >= stl_nrbrds) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 702 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 704 | if (brdp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 705 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | minordev = MINOR2PORT(minordev); |
| 707 | for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 708 | if (brdp->panels[panelnr] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | break; |
| 710 | if (minordev < brdp->panels[panelnr]->nrports) { |
| 711 | portnr = minordev; |
| 712 | break; |
| 713 | } |
| 714 | minordev -= brdp->panels[panelnr]->nrports; |
| 715 | } |
| 716 | if (portnr < 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 717 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
| 719 | portp = brdp->panels[panelnr]->ports[portnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 720 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 721 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
| 723 | /* |
| 724 | * On the first open of the device setup the port hardware, and |
| 725 | * initialize the per port data structure. |
| 726 | */ |
| 727 | portp->tty = tty; |
| 728 | tty->driver_data = portp; |
| 729 | portp->refcount++; |
| 730 | |
| 731 | if ((portp->flags & ASYNC_INITIALIZED) == 0) { |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 732 | if (!portp->tx.buf) { |
| 733 | portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); |
| 734 | if (!portp->tx.buf) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 735 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | portp->tx.head = portp->tx.buf; |
| 737 | portp->tx.tail = portp->tx.buf; |
| 738 | } |
| 739 | stl_setport(portp, tty->termios); |
| 740 | portp->sigs = stl_getsignals(portp); |
| 741 | stl_setsignals(portp, 1, 1); |
| 742 | stl_enablerxtx(portp, 1, 1); |
| 743 | stl_startrxtx(portp, 1, 0); |
| 744 | clear_bit(TTY_IO_ERROR, &tty->flags); |
| 745 | portp->flags |= ASYNC_INITIALIZED; |
| 746 | } |
| 747 | |
| 748 | /* |
| 749 | * Check if this port is in the middle of closing. If so then wait |
| 750 | * until it is closed then return error status, based on flag settings. |
| 751 | * The sleep here does not need interrupt protection since the wakeup |
| 752 | * for it is done with the same context. |
| 753 | */ |
| 754 | if (portp->flags & ASYNC_CLOSING) { |
| 755 | interruptible_sleep_on(&portp->close_wait); |
| 756 | if (portp->flags & ASYNC_HUP_NOTIFY) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 757 | return -EAGAIN; |
| 758 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | /* |
| 762 | * Based on type of open being done check if it can overlap with any |
| 763 | * previous opens still in effect. If we are a normal serial device |
| 764 | * then also we might have to wait for carrier. |
| 765 | */ |
| 766 | if (!(filp->f_flags & O_NONBLOCK)) { |
| 767 | if ((rc = stl_waitcarrier(portp, filp)) != 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 768 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | } |
| 770 | portp->flags |= ASYNC_NORMAL_ACTIVE; |
| 771 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 772 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | } |
| 774 | |
| 775 | /*****************************************************************************/ |
| 776 | |
| 777 | /* |
| 778 | * Possibly need to wait for carrier (DCD signal) to come high. Say |
| 779 | * maybe because if we are clocal then we don't need to wait... |
| 780 | */ |
| 781 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 782 | static int stl_waitcarrier(struct stlport *portp, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | { |
| 784 | unsigned long flags; |
| 785 | int rc, doclocal; |
| 786 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 787 | pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | |
| 789 | rc = 0; |
| 790 | doclocal = 0; |
| 791 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 792 | spin_lock_irqsave(&stallion_lock, flags); |
| 793 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | if (portp->tty->termios->c_cflag & CLOCAL) |
| 795 | doclocal++; |
| 796 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | portp->openwaitcnt++; |
| 798 | if (! tty_hung_up_p(filp)) |
| 799 | portp->refcount--; |
| 800 | |
| 801 | for (;;) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 802 | /* Takes brd_lock internally */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | stl_setsignals(portp, 1, 1); |
| 804 | if (tty_hung_up_p(filp) || |
| 805 | ((portp->flags & ASYNC_INITIALIZED) == 0)) { |
| 806 | if (portp->flags & ASYNC_HUP_NOTIFY) |
| 807 | rc = -EBUSY; |
| 808 | else |
| 809 | rc = -ERESTARTSYS; |
| 810 | break; |
| 811 | } |
| 812 | if (((portp->flags & ASYNC_CLOSING) == 0) && |
| 813 | (doclocal || (portp->sigs & TIOCM_CD))) { |
| 814 | break; |
| 815 | } |
| 816 | if (signal_pending(current)) { |
| 817 | rc = -ERESTARTSYS; |
| 818 | break; |
| 819 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 820 | /* FIXME */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | interruptible_sleep_on(&portp->open_wait); |
| 822 | } |
| 823 | |
| 824 | if (! tty_hung_up_p(filp)) |
| 825 | portp->refcount++; |
| 826 | portp->openwaitcnt--; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 827 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 829 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | } |
| 831 | |
| 832 | /*****************************************************************************/ |
| 833 | |
Jiri Slaby | 96b066b | 2006-12-08 02:38:42 -0800 | [diff] [blame] | 834 | static void stl_flushbuffer(struct tty_struct *tty) |
| 835 | { |
| 836 | struct stlport *portp; |
| 837 | |
| 838 | pr_debug("stl_flushbuffer(tty=%p)\n", tty); |
| 839 | |
| 840 | if (tty == NULL) |
| 841 | return; |
| 842 | portp = tty->driver_data; |
| 843 | if (portp == NULL) |
| 844 | return; |
| 845 | |
| 846 | stl_flush(portp); |
| 847 | tty_wakeup(tty); |
| 848 | } |
| 849 | |
| 850 | /*****************************************************************************/ |
| 851 | |
| 852 | static void stl_waituntilsent(struct tty_struct *tty, int timeout) |
| 853 | { |
| 854 | struct stlport *portp; |
| 855 | unsigned long tend; |
| 856 | |
| 857 | pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout); |
| 858 | |
| 859 | if (tty == NULL) |
| 860 | return; |
| 861 | portp = tty->driver_data; |
| 862 | if (portp == NULL) |
| 863 | return; |
| 864 | |
| 865 | if (timeout == 0) |
| 866 | timeout = HZ; |
| 867 | tend = jiffies + timeout; |
| 868 | |
| 869 | while (stl_datastate(portp)) { |
| 870 | if (signal_pending(current)) |
| 871 | break; |
| 872 | msleep_interruptible(20); |
| 873 | if (time_after_eq(jiffies, tend)) |
| 874 | break; |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | /*****************************************************************************/ |
| 879 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | static void stl_close(struct tty_struct *tty, struct file *filp) |
| 881 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 882 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | unsigned long flags; |
| 884 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 885 | pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
| 887 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 888 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | return; |
| 890 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 891 | spin_lock_irqsave(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | if (tty_hung_up_p(filp)) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 893 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | return; |
| 895 | } |
| 896 | if ((tty->count == 1) && (portp->refcount != 1)) |
| 897 | portp->refcount = 1; |
| 898 | if (portp->refcount-- > 1) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 899 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | return; |
| 901 | } |
| 902 | |
| 903 | portp->refcount = 0; |
| 904 | portp->flags |= ASYNC_CLOSING; |
| 905 | |
| 906 | /* |
| 907 | * May want to wait for any data to drain before closing. The BUSY |
| 908 | * flag keeps track of whether we are still sending or not - it is |
| 909 | * very accurate for the cd1400, not quite so for the sc26198. |
| 910 | * (The sc26198 has no "end-of-data" interrupt only empty FIFO) |
| 911 | */ |
| 912 | tty->closing = 1; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 913 | |
| 914 | spin_unlock_irqrestore(&stallion_lock, flags); |
| 915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| 917 | tty_wait_until_sent(tty, portp->closing_wait); |
| 918 | stl_waituntilsent(tty, (HZ / 2)); |
| 919 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 920 | |
| 921 | spin_lock_irqsave(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | portp->flags &= ~ASYNC_INITIALIZED; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 923 | spin_unlock_irqrestore(&stallion_lock, flags); |
| 924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | stl_disableintrs(portp); |
| 926 | if (tty->termios->c_cflag & HUPCL) |
| 927 | stl_setsignals(portp, 0, 0); |
| 928 | stl_enablerxtx(portp, 0, 0); |
| 929 | stl_flushbuffer(tty); |
| 930 | portp->istate = 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 931 | if (portp->tx.buf != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | kfree(portp->tx.buf); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 933 | portp->tx.buf = NULL; |
| 934 | portp->tx.head = NULL; |
| 935 | portp->tx.tail = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | } |
| 937 | set_bit(TTY_IO_ERROR, &tty->flags); |
| 938 | tty_ldisc_flush(tty); |
| 939 | |
| 940 | tty->closing = 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 941 | portp->tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | |
| 943 | if (portp->openwaitcnt) { |
| 944 | if (portp->close_delay) |
| 945 | msleep_interruptible(jiffies_to_msecs(portp->close_delay)); |
| 946 | wake_up_interruptible(&portp->open_wait); |
| 947 | } |
| 948 | |
| 949 | portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 950 | wake_up_interruptible(&portp->close_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | /*****************************************************************************/ |
| 954 | |
| 955 | /* |
| 956 | * Write routine. Take data and stuff it in to the TX ring queue. |
| 957 | * If transmit interrupts are not running then start them. |
| 958 | */ |
| 959 | |
| 960 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| 961 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 962 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | unsigned int len, stlen; |
| 964 | unsigned char *chbuf; |
| 965 | char *head, *tail; |
| 966 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 967 | pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 970 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 971 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 972 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 973 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
| 975 | /* |
| 976 | * If copying direct from user space we must cater for page faults, |
| 977 | * causing us to "sleep" here for a while. To handle this copy in all |
| 978 | * the data we need now, into a local buffer. Then when we got it all |
| 979 | * copy it into the TX buffer. |
| 980 | */ |
| 981 | chbuf = (unsigned char *) buf; |
| 982 | |
| 983 | head = portp->tx.head; |
| 984 | tail = portp->tx.tail; |
| 985 | if (head >= tail) { |
| 986 | len = STL_TXBUFSIZE - (head - tail) - 1; |
| 987 | stlen = STL_TXBUFSIZE - (head - portp->tx.buf); |
| 988 | } else { |
| 989 | len = tail - head - 1; |
| 990 | stlen = len; |
| 991 | } |
| 992 | |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 993 | len = min(len, (unsigned int)count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | count = 0; |
| 995 | while (len > 0) { |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 996 | stlen = min(len, stlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | memcpy(head, chbuf, stlen); |
| 998 | len -= stlen; |
| 999 | chbuf += stlen; |
| 1000 | count += stlen; |
| 1001 | head += stlen; |
| 1002 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { |
| 1003 | head = portp->tx.buf; |
| 1004 | stlen = tail - head; |
| 1005 | } |
| 1006 | } |
| 1007 | portp->tx.head = head; |
| 1008 | |
| 1009 | clear_bit(ASYI_TXLOW, &portp->istate); |
| 1010 | stl_startrxtx(portp, -1, 1); |
| 1011 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1012 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | } |
| 1014 | |
| 1015 | /*****************************************************************************/ |
| 1016 | |
| 1017 | static void stl_putchar(struct tty_struct *tty, unsigned char ch) |
| 1018 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1019 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | unsigned int len; |
| 1021 | char *head, *tail; |
| 1022 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1023 | pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1025 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | return; |
| 1027 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1028 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | return; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1030 | if (portp->tx.buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | return; |
| 1032 | |
| 1033 | head = portp->tx.head; |
| 1034 | tail = portp->tx.tail; |
| 1035 | |
| 1036 | len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); |
| 1037 | len--; |
| 1038 | |
| 1039 | if (len > 0) { |
| 1040 | *head++ = ch; |
| 1041 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 1042 | head = portp->tx.buf; |
| 1043 | } |
| 1044 | portp->tx.head = head; |
| 1045 | } |
| 1046 | |
| 1047 | /*****************************************************************************/ |
| 1048 | |
| 1049 | /* |
| 1050 | * If there are any characters in the buffer then make sure that TX |
| 1051 | * interrupts are on and get'em out. Normally used after the putchar |
| 1052 | * routine has been called. |
| 1053 | */ |
| 1054 | |
| 1055 | static void stl_flushchars(struct tty_struct *tty) |
| 1056 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1057 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1059 | pr_debug("stl_flushchars(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1061 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | return; |
| 1063 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1064 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | return; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1066 | if (portp->tx.buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | return; |
| 1068 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | stl_startrxtx(portp, -1, 1); |
| 1070 | } |
| 1071 | |
| 1072 | /*****************************************************************************/ |
| 1073 | |
| 1074 | static int stl_writeroom(struct tty_struct *tty) |
| 1075 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1076 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | char *head, *tail; |
| 1078 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1079 | pr_debug("stl_writeroom(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1081 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1082 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1084 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1085 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1086 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1087 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | |
| 1089 | head = portp->tx.head; |
| 1090 | tail = portp->tx.tail; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1091 | return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | } |
| 1093 | |
| 1094 | /*****************************************************************************/ |
| 1095 | |
| 1096 | /* |
| 1097 | * Return number of chars in the TX buffer. Normally we would just |
| 1098 | * calculate the number of chars in the buffer and return that, but if |
| 1099 | * the buffer is empty and TX interrupts are still on then we return |
| 1100 | * that the buffer still has 1 char in it. This way whoever called us |
| 1101 | * will not think that ALL chars have drained - since the UART still |
| 1102 | * must have some chars in it (we are busy after all). |
| 1103 | */ |
| 1104 | |
| 1105 | static int stl_charsinbuffer(struct tty_struct *tty) |
| 1106 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1107 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | unsigned int size; |
| 1109 | char *head, *tail; |
| 1110 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1111 | pr_debug("stl_charsinbuffer(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1113 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1114 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1116 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1117 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1118 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1119 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
| 1121 | head = portp->tx.head; |
| 1122 | tail = portp->tx.tail; |
| 1123 | size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 1124 | if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) |
| 1125 | size = 1; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1126 | return size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | /*****************************************************************************/ |
| 1130 | |
| 1131 | /* |
| 1132 | * Generate the serial struct info. |
| 1133 | */ |
| 1134 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1135 | static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | { |
| 1137 | struct serial_struct sio; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1138 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1140 | pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | |
| 1142 | memset(&sio, 0, sizeof(struct serial_struct)); |
| 1143 | sio.line = portp->portnr; |
| 1144 | sio.port = portp->ioaddr; |
| 1145 | sio.flags = portp->flags; |
| 1146 | sio.baud_base = portp->baud_base; |
| 1147 | sio.close_delay = portp->close_delay; |
| 1148 | sio.closing_wait = portp->closing_wait; |
| 1149 | sio.custom_divisor = portp->custom_divisor; |
| 1150 | sio.hub6 = 0; |
| 1151 | if (portp->uartp == &stl_cd1400uart) { |
| 1152 | sio.type = PORT_CIRRUS; |
| 1153 | sio.xmit_fifo_size = CD1400_TXFIFOSIZE; |
| 1154 | } else { |
| 1155 | sio.type = PORT_UNKNOWN; |
| 1156 | sio.xmit_fifo_size = SC26198_TXFIFOSIZE; |
| 1157 | } |
| 1158 | |
| 1159 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1160 | if (brdp != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | sio.irq = brdp->irq; |
| 1162 | |
| 1163 | return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; |
| 1164 | } |
| 1165 | |
| 1166 | /*****************************************************************************/ |
| 1167 | |
| 1168 | /* |
| 1169 | * Set port according to the serial struct info. |
| 1170 | * At this point we do not do any auto-configure stuff, so we will |
| 1171 | * just quietly ignore any requests to change irq, etc. |
| 1172 | */ |
| 1173 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1174 | static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | { |
| 1176 | struct serial_struct sio; |
| 1177 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1178 | pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | |
| 1180 | if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) |
| 1181 | return -EFAULT; |
| 1182 | if (!capable(CAP_SYS_ADMIN)) { |
| 1183 | if ((sio.baud_base != portp->baud_base) || |
| 1184 | (sio.close_delay != portp->close_delay) || |
| 1185 | ((sio.flags & ~ASYNC_USR_MASK) != |
| 1186 | (portp->flags & ~ASYNC_USR_MASK))) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1187 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | } |
| 1189 | |
| 1190 | portp->flags = (portp->flags & ~ASYNC_USR_MASK) | |
| 1191 | (sio.flags & ASYNC_USR_MASK); |
| 1192 | portp->baud_base = sio.baud_base; |
| 1193 | portp->close_delay = sio.close_delay; |
| 1194 | portp->closing_wait = sio.closing_wait; |
| 1195 | portp->custom_divisor = sio.custom_divisor; |
| 1196 | stl_setport(portp, portp->tty->termios); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1197 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | } |
| 1199 | |
| 1200 | /*****************************************************************************/ |
| 1201 | |
| 1202 | static int stl_tiocmget(struct tty_struct *tty, struct file *file) |
| 1203 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1204 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1206 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1207 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1209 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1210 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1212 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | |
| 1214 | return stl_getsignals(portp); |
| 1215 | } |
| 1216 | |
| 1217 | static int stl_tiocmset(struct tty_struct *tty, struct file *file, |
| 1218 | unsigned int set, unsigned int clear) |
| 1219 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1220 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | int rts = -1, dtr = -1; |
| 1222 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1223 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1224 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1226 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1227 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1229 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | |
| 1231 | if (set & TIOCM_RTS) |
| 1232 | rts = 1; |
| 1233 | if (set & TIOCM_DTR) |
| 1234 | dtr = 1; |
| 1235 | if (clear & TIOCM_RTS) |
| 1236 | rts = 0; |
| 1237 | if (clear & TIOCM_DTR) |
| 1238 | dtr = 0; |
| 1239 | |
| 1240 | stl_setsignals(portp, dtr, rts); |
| 1241 | return 0; |
| 1242 | } |
| 1243 | |
| 1244 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) |
| 1245 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1246 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | unsigned int ival; |
| 1248 | int rc; |
| 1249 | void __user *argp = (void __user *)arg; |
| 1250 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1251 | pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd, |
| 1252 | arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1254 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1255 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1257 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1258 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | |
| 1260 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
| 1261 | (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { |
| 1262 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1263 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
| 1266 | rc = 0; |
| 1267 | |
| 1268 | switch (cmd) { |
| 1269 | case TIOCGSOFTCAR: |
| 1270 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), |
| 1271 | (unsigned __user *) argp); |
| 1272 | break; |
| 1273 | case TIOCSSOFTCAR: |
| 1274 | if (get_user(ival, (unsigned int __user *) arg)) |
| 1275 | return -EFAULT; |
| 1276 | tty->termios->c_cflag = |
| 1277 | (tty->termios->c_cflag & ~CLOCAL) | |
| 1278 | (ival ? CLOCAL : 0); |
| 1279 | break; |
| 1280 | case TIOCGSERIAL: |
| 1281 | rc = stl_getserial(portp, argp); |
| 1282 | break; |
| 1283 | case TIOCSSERIAL: |
| 1284 | rc = stl_setserial(portp, argp); |
| 1285 | break; |
| 1286 | case COM_GETPORTSTATS: |
| 1287 | rc = stl_getportstats(portp, argp); |
| 1288 | break; |
| 1289 | case COM_CLRPORTSTATS: |
| 1290 | rc = stl_clrportstats(portp, argp); |
| 1291 | break; |
| 1292 | case TIOCSERCONFIG: |
| 1293 | case TIOCSERGWILD: |
| 1294 | case TIOCSERSWILD: |
| 1295 | case TIOCSERGETLSR: |
| 1296 | case TIOCSERGSTRUCT: |
| 1297 | case TIOCSERGETMULTI: |
| 1298 | case TIOCSERSETMULTI: |
| 1299 | default: |
| 1300 | rc = -ENOIOCTLCMD; |
| 1301 | break; |
| 1302 | } |
| 1303 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1304 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | } |
| 1306 | |
| 1307 | /*****************************************************************************/ |
| 1308 | |
Jiri Slaby | 96b066b | 2006-12-08 02:38:42 -0800 | [diff] [blame] | 1309 | /* |
| 1310 | * Start the transmitter again. Just turn TX interrupts back on. |
| 1311 | */ |
| 1312 | |
| 1313 | static void stl_start(struct tty_struct *tty) |
| 1314 | { |
| 1315 | struct stlport *portp; |
| 1316 | |
| 1317 | pr_debug("stl_start(tty=%p)\n", tty); |
| 1318 | |
| 1319 | if (tty == NULL) |
| 1320 | return; |
| 1321 | portp = tty->driver_data; |
| 1322 | if (portp == NULL) |
| 1323 | return; |
| 1324 | stl_startrxtx(portp, -1, 1); |
| 1325 | } |
| 1326 | |
| 1327 | /*****************************************************************************/ |
| 1328 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1329 | static void stl_settermios(struct tty_struct *tty, struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1331 | struct stlport *portp; |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1332 | struct ktermios *tiosp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1334 | pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1336 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | return; |
| 1338 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1339 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | return; |
| 1341 | |
| 1342 | tiosp = tty->termios; |
| 1343 | if ((tiosp->c_cflag == old->c_cflag) && |
| 1344 | (tiosp->c_iflag == old->c_iflag)) |
| 1345 | return; |
| 1346 | |
| 1347 | stl_setport(portp, tiosp); |
| 1348 | stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), |
| 1349 | -1); |
| 1350 | if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { |
| 1351 | tty->hw_stopped = 0; |
| 1352 | stl_start(tty); |
| 1353 | } |
| 1354 | if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) |
| 1355 | wake_up_interruptible(&portp->open_wait); |
| 1356 | } |
| 1357 | |
| 1358 | /*****************************************************************************/ |
| 1359 | |
| 1360 | /* |
| 1361 | * Attempt to flow control who ever is sending us data. Based on termios |
| 1362 | * settings use software or/and hardware flow control. |
| 1363 | */ |
| 1364 | |
| 1365 | static void stl_throttle(struct tty_struct *tty) |
| 1366 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1367 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1369 | pr_debug("stl_throttle(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1371 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | return; |
| 1373 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1374 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | return; |
| 1376 | stl_flowctrl(portp, 0); |
| 1377 | } |
| 1378 | |
| 1379 | /*****************************************************************************/ |
| 1380 | |
| 1381 | /* |
| 1382 | * Unflow control the device sending us data... |
| 1383 | */ |
| 1384 | |
| 1385 | static void stl_unthrottle(struct tty_struct *tty) |
| 1386 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1387 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1389 | pr_debug("stl_unthrottle(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1391 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | return; |
| 1393 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1394 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | return; |
| 1396 | stl_flowctrl(portp, 1); |
| 1397 | } |
| 1398 | |
| 1399 | /*****************************************************************************/ |
| 1400 | |
| 1401 | /* |
| 1402 | * Stop the transmitter. Basically to do this we will just turn TX |
| 1403 | * interrupts off. |
| 1404 | */ |
| 1405 | |
| 1406 | static void stl_stop(struct tty_struct *tty) |
| 1407 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1408 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1410 | pr_debug("stl_stop(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1412 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | return; |
| 1414 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1415 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | return; |
| 1417 | stl_startrxtx(portp, -1, 0); |
| 1418 | } |
| 1419 | |
| 1420 | /*****************************************************************************/ |
| 1421 | |
| 1422 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | * Hangup this port. This is pretty much like closing the port, only |
| 1424 | * a little more brutal. No waiting for data to drain. Shutdown the |
| 1425 | * port and maybe drop signals. |
| 1426 | */ |
| 1427 | |
| 1428 | static void stl_hangup(struct tty_struct *tty) |
| 1429 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1430 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1432 | pr_debug("stl_hangup(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1434 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | return; |
| 1436 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1437 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | return; |
| 1439 | |
| 1440 | portp->flags &= ~ASYNC_INITIALIZED; |
| 1441 | stl_disableintrs(portp); |
| 1442 | if (tty->termios->c_cflag & HUPCL) |
| 1443 | stl_setsignals(portp, 0, 0); |
| 1444 | stl_enablerxtx(portp, 0, 0); |
| 1445 | stl_flushbuffer(tty); |
| 1446 | portp->istate = 0; |
| 1447 | set_bit(TTY_IO_ERROR, &tty->flags); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1448 | if (portp->tx.buf != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | kfree(portp->tx.buf); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1450 | portp->tx.buf = NULL; |
| 1451 | portp->tx.head = NULL; |
| 1452 | portp->tx.tail = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | } |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1454 | portp->tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | portp->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 1456 | portp->refcount = 0; |
| 1457 | wake_up_interruptible(&portp->open_wait); |
| 1458 | } |
| 1459 | |
| 1460 | /*****************************************************************************/ |
| 1461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | static void stl_breakctl(struct tty_struct *tty, int state) |
| 1463 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1464 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1466 | pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1468 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | return; |
| 1470 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1471 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | return; |
| 1473 | |
| 1474 | stl_sendbreak(portp, ((state == -1) ? 1 : 2)); |
| 1475 | } |
| 1476 | |
| 1477 | /*****************************************************************************/ |
| 1478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | static void stl_sendxchar(struct tty_struct *tty, char ch) |
| 1480 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1481 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1483 | pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1485 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | return; |
| 1487 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1488 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | return; |
| 1490 | |
| 1491 | if (ch == STOP_CHAR(tty)) |
| 1492 | stl_sendflow(portp, 0); |
| 1493 | else if (ch == START_CHAR(tty)) |
| 1494 | stl_sendflow(portp, 1); |
| 1495 | else |
| 1496 | stl_putchar(tty, ch); |
| 1497 | } |
| 1498 | |
| 1499 | /*****************************************************************************/ |
| 1500 | |
| 1501 | #define MAXLINE 80 |
| 1502 | |
| 1503 | /* |
| 1504 | * Format info for a specified port. The line is deliberately limited |
| 1505 | * to 80 characters. (If it is too long it will be truncated, if too |
| 1506 | * short then padded with spaces). |
| 1507 | */ |
| 1508 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1509 | static int stl_portinfo(struct stlport *portp, int portnr, char *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | { |
| 1511 | char *sp; |
| 1512 | int sigs, cnt; |
| 1513 | |
| 1514 | sp = pos; |
| 1515 | sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", |
| 1516 | portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", |
| 1517 | (int) portp->stats.txtotal, (int) portp->stats.rxtotal); |
| 1518 | |
| 1519 | if (portp->stats.rxframing) |
| 1520 | sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); |
| 1521 | if (portp->stats.rxparity) |
| 1522 | sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); |
| 1523 | if (portp->stats.rxbreaks) |
| 1524 | sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); |
| 1525 | if (portp->stats.rxoverrun) |
| 1526 | sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); |
| 1527 | |
| 1528 | sigs = stl_getsignals(portp); |
| 1529 | cnt = sprintf(sp, "%s%s%s%s%s ", |
| 1530 | (sigs & TIOCM_RTS) ? "|RTS" : "", |
| 1531 | (sigs & TIOCM_CTS) ? "|CTS" : "", |
| 1532 | (sigs & TIOCM_DTR) ? "|DTR" : "", |
| 1533 | (sigs & TIOCM_CD) ? "|DCD" : "", |
| 1534 | (sigs & TIOCM_DSR) ? "|DSR" : ""); |
| 1535 | *sp = ' '; |
| 1536 | sp += cnt; |
| 1537 | |
| 1538 | for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) |
| 1539 | *sp++ = ' '; |
| 1540 | if (cnt >= MAXLINE) |
| 1541 | pos[(MAXLINE - 2)] = '+'; |
| 1542 | pos[(MAXLINE - 1)] = '\n'; |
| 1543 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1544 | return MAXLINE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | } |
| 1546 | |
| 1547 | /*****************************************************************************/ |
| 1548 | |
| 1549 | /* |
| 1550 | * Port info, read from the /proc file system. |
| 1551 | */ |
| 1552 | |
| 1553 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) |
| 1554 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1555 | struct stlbrd *brdp; |
| 1556 | struct stlpanel *panelp; |
| 1557 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | int brdnr, panelnr, portnr, totalport; |
| 1559 | int curoff, maxoff; |
| 1560 | char *pos; |
| 1561 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1562 | pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p," |
| 1563 | "data=%p\n", page, start, off, count, eof, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | |
| 1565 | pos = page; |
| 1566 | totalport = 0; |
| 1567 | curoff = 0; |
| 1568 | |
| 1569 | if (off == 0) { |
| 1570 | pos += sprintf(pos, "%s: version %s", stl_drvtitle, |
| 1571 | stl_drvversion); |
| 1572 | while (pos < (page + MAXLINE - 1)) |
| 1573 | *pos++ = ' '; |
| 1574 | *pos++ = '\n'; |
| 1575 | } |
| 1576 | curoff = MAXLINE; |
| 1577 | |
| 1578 | /* |
| 1579 | * We scan through for each board, panel and port. The offset is |
| 1580 | * calculated on the fly, and irrelevant ports are skipped. |
| 1581 | */ |
| 1582 | for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) { |
| 1583 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1584 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | continue; |
| 1586 | if (brdp->state == 0) |
| 1587 | continue; |
| 1588 | |
| 1589 | maxoff = curoff + (brdp->nrports * MAXLINE); |
| 1590 | if (off >= maxoff) { |
| 1591 | curoff = maxoff; |
| 1592 | continue; |
| 1593 | } |
| 1594 | |
| 1595 | totalport = brdnr * STL_MAXPORTS; |
| 1596 | for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { |
| 1597 | panelp = brdp->panels[panelnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1598 | if (panelp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | continue; |
| 1600 | |
| 1601 | maxoff = curoff + (panelp->nrports * MAXLINE); |
| 1602 | if (off >= maxoff) { |
| 1603 | curoff = maxoff; |
| 1604 | totalport += panelp->nrports; |
| 1605 | continue; |
| 1606 | } |
| 1607 | |
| 1608 | for (portnr = 0; (portnr < panelp->nrports); portnr++, |
| 1609 | totalport++) { |
| 1610 | portp = panelp->ports[portnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1611 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | continue; |
| 1613 | if (off >= (curoff += MAXLINE)) |
| 1614 | continue; |
| 1615 | if ((pos - page + MAXLINE) > count) |
| 1616 | goto stl_readdone; |
| 1617 | pos += stl_portinfo(portp, totalport, pos); |
| 1618 | } |
| 1619 | } |
| 1620 | } |
| 1621 | |
| 1622 | *eof = 1; |
| 1623 | |
| 1624 | stl_readdone: |
| 1625 | *start = page; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1626 | return (pos - page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | } |
| 1628 | |
| 1629 | /*****************************************************************************/ |
| 1630 | |
| 1631 | /* |
| 1632 | * All board interrupts are vectored through here first. This code then |
| 1633 | * calls off to the approrpriate board interrupt handlers. |
| 1634 | */ |
| 1635 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1636 | static irqreturn_t stl_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1638 | struct stlbrd *brdp = dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1640 | pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | |
| 1642 | return IRQ_RETVAL((* brdp->isr)(brdp)); |
| 1643 | } |
| 1644 | |
| 1645 | /*****************************************************************************/ |
| 1646 | |
| 1647 | /* |
| 1648 | * Interrupt service routine for EasyIO board types. |
| 1649 | */ |
| 1650 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1651 | static int stl_eiointr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1653 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | unsigned int iobase; |
| 1655 | int handled = 0; |
| 1656 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1657 | spin_lock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | panelp = brdp->panels[0]; |
| 1659 | iobase = panelp->iobase; |
| 1660 | while (inb(brdp->iostatus) & EIO_INTRPEND) { |
| 1661 | handled = 1; |
| 1662 | (* panelp->isr)(panelp, iobase); |
| 1663 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1664 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | return handled; |
| 1666 | } |
| 1667 | |
| 1668 | /*****************************************************************************/ |
| 1669 | |
| 1670 | /* |
| 1671 | * Interrupt service routine for ECH-AT board types. |
| 1672 | */ |
| 1673 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1674 | static int stl_echatintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1676 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | unsigned int ioaddr; |
| 1678 | int bnknr; |
| 1679 | int handled = 0; |
| 1680 | |
| 1681 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
| 1682 | |
| 1683 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
| 1684 | handled = 1; |
| 1685 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1686 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1687 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1688 | panelp = brdp->bnk2panel[bnknr]; |
| 1689 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1690 | } |
| 1691 | } |
| 1692 | } |
| 1693 | |
| 1694 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| 1695 | |
| 1696 | return handled; |
| 1697 | } |
| 1698 | |
| 1699 | /*****************************************************************************/ |
| 1700 | |
| 1701 | /* |
| 1702 | * Interrupt service routine for ECH-MCA board types. |
| 1703 | */ |
| 1704 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1705 | static int stl_echmcaintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1707 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | unsigned int ioaddr; |
| 1709 | int bnknr; |
| 1710 | int handled = 0; |
| 1711 | |
| 1712 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
| 1713 | handled = 1; |
| 1714 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1715 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1716 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1717 | panelp = brdp->bnk2panel[bnknr]; |
| 1718 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1719 | } |
| 1720 | } |
| 1721 | } |
| 1722 | return handled; |
| 1723 | } |
| 1724 | |
| 1725 | /*****************************************************************************/ |
| 1726 | |
| 1727 | /* |
| 1728 | * Interrupt service routine for ECH-PCI board types. |
| 1729 | */ |
| 1730 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1731 | static int stl_echpciintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1733 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | unsigned int ioaddr; |
| 1735 | int bnknr, recheck; |
| 1736 | int handled = 0; |
| 1737 | |
| 1738 | while (1) { |
| 1739 | recheck = 0; |
| 1740 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1741 | outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); |
| 1742 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1743 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1744 | panelp = brdp->bnk2panel[bnknr]; |
| 1745 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1746 | recheck++; |
| 1747 | handled = 1; |
| 1748 | } |
| 1749 | } |
| 1750 | if (! recheck) |
| 1751 | break; |
| 1752 | } |
| 1753 | return handled; |
| 1754 | } |
| 1755 | |
| 1756 | /*****************************************************************************/ |
| 1757 | |
| 1758 | /* |
| 1759 | * Interrupt service routine for ECH-8/64-PCI board types. |
| 1760 | */ |
| 1761 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1762 | static int stl_echpci64intr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1764 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | unsigned int ioaddr; |
| 1766 | int bnknr; |
| 1767 | int handled = 0; |
| 1768 | |
| 1769 | while (inb(brdp->ioctrl) & 0x1) { |
| 1770 | handled = 1; |
| 1771 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1772 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1773 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1774 | panelp = brdp->bnk2panel[bnknr]; |
| 1775 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1776 | } |
| 1777 | } |
| 1778 | } |
| 1779 | |
| 1780 | return handled; |
| 1781 | } |
| 1782 | |
| 1783 | /*****************************************************************************/ |
| 1784 | |
| 1785 | /* |
| 1786 | * Service an off-level request for some channel. |
| 1787 | */ |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 1788 | static void stl_offintr(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1790 | struct stlport *portp = container_of(work, struct stlport, tqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | struct tty_struct *tty; |
| 1792 | unsigned int oldsigs; |
| 1793 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1794 | pr_debug("stl_offintr(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1796 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | return; |
| 1798 | |
| 1799 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1800 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | return; |
| 1802 | |
| 1803 | lock_kernel(); |
| 1804 | if (test_bit(ASYI_TXLOW, &portp->istate)) { |
| 1805 | tty_wakeup(tty); |
| 1806 | } |
| 1807 | if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { |
| 1808 | clear_bit(ASYI_DCDCHANGE, &portp->istate); |
| 1809 | oldsigs = portp->sigs; |
| 1810 | portp->sigs = stl_getsignals(portp); |
| 1811 | if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) |
| 1812 | wake_up_interruptible(&portp->open_wait); |
| 1813 | if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { |
| 1814 | if (portp->flags & ASYNC_CHECK_CD) |
| 1815 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ |
| 1816 | } |
| 1817 | } |
| 1818 | unlock_kernel(); |
| 1819 | } |
| 1820 | |
| 1821 | /*****************************************************************************/ |
| 1822 | |
| 1823 | /* |
| 1824 | * Initialize all the ports on a panel. |
| 1825 | */ |
| 1826 | |
Jiri Slaby | 705c186 | 2006-12-08 02:39:11 -0800 | [diff] [blame] | 1827 | static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1829 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | int chipmask, i; |
| 1831 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1832 | pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
| 1834 | chipmask = stl_panelinit(brdp, panelp); |
| 1835 | |
| 1836 | /* |
| 1837 | * All UART's are initialized (if found!). Now go through and setup |
| 1838 | * each ports data structures. |
| 1839 | */ |
| 1840 | for (i = 0; (i < panelp->nrports); i++) { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1841 | portp = kzalloc(sizeof(struct stlport), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 1842 | if (!portp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | printk("STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1844 | "(size=%Zd)\n", sizeof(struct stlport)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | break; |
| 1846 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | |
| 1848 | portp->magic = STL_PORTMAGIC; |
| 1849 | portp->portnr = i; |
| 1850 | portp->brdnr = panelp->brdnr; |
| 1851 | portp->panelnr = panelp->panelnr; |
| 1852 | portp->uartp = panelp->uartp; |
| 1853 | portp->clk = brdp->clk; |
| 1854 | portp->baud_base = STL_BAUDBASE; |
| 1855 | portp->close_delay = STL_CLOSEDELAY; |
| 1856 | portp->closing_wait = 30 * HZ; |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 1857 | INIT_WORK(&portp->tqueue, stl_offintr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | init_waitqueue_head(&portp->open_wait); |
| 1859 | init_waitqueue_head(&portp->close_wait); |
| 1860 | portp->stats.brd = portp->brdnr; |
| 1861 | portp->stats.panel = portp->panelnr; |
| 1862 | portp->stats.port = portp->portnr; |
| 1863 | panelp->ports[i] = portp; |
| 1864 | stl_portinit(brdp, panelp, portp); |
| 1865 | } |
| 1866 | |
| 1867 | return(0); |
| 1868 | } |
| 1869 | |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1870 | static void stl_cleanup_panels(struct stlbrd *brdp) |
| 1871 | { |
| 1872 | struct stlpanel *panelp; |
| 1873 | struct stlport *portp; |
| 1874 | unsigned int j, k; |
| 1875 | |
| 1876 | for (j = 0; j < STL_MAXPANELS; j++) { |
| 1877 | panelp = brdp->panels[j]; |
| 1878 | if (panelp == NULL) |
| 1879 | continue; |
| 1880 | for (k = 0; k < STL_PORTSPERPANEL; k++) { |
| 1881 | portp = panelp->ports[k]; |
| 1882 | if (portp == NULL) |
| 1883 | continue; |
| 1884 | if (portp->tty != NULL) |
| 1885 | stl_hangup(portp->tty); |
| 1886 | kfree(portp->tx.buf); |
| 1887 | kfree(portp); |
| 1888 | } |
| 1889 | kfree(panelp); |
| 1890 | } |
| 1891 | } |
| 1892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | /*****************************************************************************/ |
| 1894 | |
| 1895 | /* |
| 1896 | * Try to find and initialize an EasyIO board. |
| 1897 | */ |
| 1898 | |
Jiri Slaby | 705c186 | 2006-12-08 02:39:11 -0800 | [diff] [blame] | 1899 | static int __devinit stl_initeio(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1901 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | unsigned int status; |
| 1903 | char *name; |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1904 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1906 | pr_debug("stl_initeio(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1907 | |
| 1908 | brdp->ioctrl = brdp->ioaddr1 + 1; |
| 1909 | brdp->iostatus = brdp->ioaddr1 + 2; |
| 1910 | |
| 1911 | status = inb(brdp->iostatus); |
| 1912 | if ((status & EIO_IDBITMASK) == EIO_MK3) |
| 1913 | brdp->ioctrl++; |
| 1914 | |
| 1915 | /* |
| 1916 | * Handle board specific stuff now. The real difference is PCI |
| 1917 | * or not PCI. |
| 1918 | */ |
| 1919 | if (brdp->brdtype == BRD_EASYIOPCI) { |
| 1920 | brdp->iosize1 = 0x80; |
| 1921 | brdp->iosize2 = 0x80; |
| 1922 | name = "serial(EIO-PCI)"; |
| 1923 | outb(0x41, (brdp->ioaddr2 + 0x4c)); |
| 1924 | } else { |
| 1925 | brdp->iosize1 = 8; |
| 1926 | name = "serial(EIO)"; |
| 1927 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 1928 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 1929 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 1930 | brdp->irq, brdp->brdnr); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1931 | retval = -EINVAL; |
| 1932 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | } |
| 1934 | outb((stl_vecmap[brdp->irq] | EIO_0WS | |
| 1935 | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), |
| 1936 | brdp->ioctrl); |
| 1937 | } |
| 1938 | |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1939 | retval = -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
| 1941 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
| 1942 | "%x conflicts with another device\n", brdp->brdnr, |
| 1943 | brdp->ioaddr1); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1944 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | } |
| 1946 | |
| 1947 | if (brdp->iosize2 > 0) |
| 1948 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
| 1949 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
| 1950 | "address %x conflicts with another device\n", |
| 1951 | brdp->brdnr, brdp->ioaddr2); |
| 1952 | printk(KERN_WARNING "STALLION: Warning, also " |
| 1953 | "releasing board %d I/O address %x \n", |
| 1954 | brdp->brdnr, brdp->ioaddr1); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1955 | goto err_rel1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | } |
| 1957 | |
| 1958 | /* |
| 1959 | * Everything looks OK, so let's go ahead and probe for the hardware. |
| 1960 | */ |
| 1961 | brdp->clk = CD1400_CLK; |
| 1962 | brdp->isr = stl_eiointr; |
| 1963 | |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1964 | retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | switch (status & EIO_IDBITMASK) { |
| 1966 | case EIO_8PORTM: |
| 1967 | brdp->clk = CD1400_CLK8M; |
| 1968 | /* fall thru */ |
| 1969 | case EIO_8PORTRS: |
| 1970 | case EIO_8PORTDI: |
| 1971 | brdp->nrports = 8; |
| 1972 | break; |
| 1973 | case EIO_4PORTRS: |
| 1974 | brdp->nrports = 4; |
| 1975 | break; |
| 1976 | case EIO_MK3: |
| 1977 | switch (status & EIO_BRDMASK) { |
| 1978 | case ID_BRD4: |
| 1979 | brdp->nrports = 4; |
| 1980 | break; |
| 1981 | case ID_BRD8: |
| 1982 | brdp->nrports = 8; |
| 1983 | break; |
| 1984 | case ID_BRD16: |
| 1985 | brdp->nrports = 16; |
| 1986 | break; |
| 1987 | default: |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1988 | goto err_rel2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | } |
| 1990 | break; |
| 1991 | default: |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 1992 | goto err_rel2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1993 | } |
| 1994 | |
| 1995 | /* |
| 1996 | * We have verified that the board is actually present, so now we |
| 1997 | * can complete the setup. |
| 1998 | */ |
| 1999 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2000 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 2001 | if (!panelp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | printk(KERN_WARNING "STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2003 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2004 | retval = -ENOMEM; |
| 2005 | goto err_rel2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | |
| 2008 | panelp->magic = STL_PANELMAGIC; |
| 2009 | panelp->brdnr = brdp->brdnr; |
| 2010 | panelp->panelnr = 0; |
| 2011 | panelp->nrports = brdp->nrports; |
| 2012 | panelp->iobase = brdp->ioaddr1; |
| 2013 | panelp->hwid = status; |
| 2014 | if ((status & EIO_IDBITMASK) == EIO_MK3) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2015 | panelp->uartp = &stl_sc26198uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | panelp->isr = stl_sc26198intr; |
| 2017 | } else { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2018 | panelp->uartp = &stl_cd1400uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2019 | panelp->isr = stl_cd1400eiointr; |
| 2020 | } |
| 2021 | |
| 2022 | brdp->panels[0] = panelp; |
| 2023 | brdp->nrpanels = 1; |
| 2024 | brdp->state |= BRD_FOUND; |
| 2025 | brdp->hwid = status; |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 2026 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | printk("STALLION: failed to register interrupt " |
| 2028 | "routine for %s irq=%d\n", name, brdp->irq); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2029 | retval = -ENODEV; |
| 2030 | goto err_fr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2031 | } |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2032 | |
| 2033 | return 0; |
| 2034 | err_fr: |
| 2035 | stl_cleanup_panels(brdp); |
| 2036 | err_rel2: |
| 2037 | if (brdp->iosize2 > 0) |
| 2038 | release_region(brdp->ioaddr2, brdp->iosize2); |
| 2039 | err_rel1: |
| 2040 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2041 | err: |
| 2042 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2043 | } |
| 2044 | |
| 2045 | /*****************************************************************************/ |
| 2046 | |
| 2047 | /* |
| 2048 | * Try to find an ECH board and initialize it. This code is capable of |
| 2049 | * dealing with all types of ECH board. |
| 2050 | */ |
| 2051 | |
Jiri Slaby | 705c186 | 2006-12-08 02:39:11 -0800 | [diff] [blame] | 2052 | static int __devinit stl_initech(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2054 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | unsigned int status, nxtid, ioaddr, conflict; |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2056 | int panelnr, banknr, i, retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2057 | char *name; |
| 2058 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2059 | pr_debug("stl_initech(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2060 | |
| 2061 | status = 0; |
| 2062 | conflict = 0; |
| 2063 | |
| 2064 | /* |
| 2065 | * Set up the initial board register contents for boards. This varies a |
| 2066 | * bit between the different board types. So we need to handle each |
| 2067 | * separately. Also do a check that the supplied IRQ is good. |
| 2068 | */ |
| 2069 | switch (brdp->brdtype) { |
| 2070 | |
| 2071 | case BRD_ECH: |
| 2072 | brdp->isr = stl_echatintr; |
| 2073 | brdp->ioctrl = brdp->ioaddr1 + 1; |
| 2074 | brdp->iostatus = brdp->ioaddr1 + 1; |
| 2075 | status = inb(brdp->iostatus); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2076 | if ((status & ECH_IDBITMASK) != ECH_ID) { |
| 2077 | retval = -ENODEV; |
| 2078 | goto err; |
| 2079 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2081 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2082 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2083 | brdp->irq, brdp->brdnr); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2084 | retval = -EINVAL; |
| 2085 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | } |
| 2087 | status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); |
| 2088 | status |= (stl_vecmap[brdp->irq] << 1); |
| 2089 | outb((status | ECH_BRDRESET), brdp->ioaddr1); |
| 2090 | brdp->ioctrlval = ECH_INTENABLE | |
| 2091 | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); |
| 2092 | for (i = 0; (i < 10); i++) |
| 2093 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
| 2094 | brdp->iosize1 = 2; |
| 2095 | brdp->iosize2 = 32; |
| 2096 | name = "serial(EC8/32)"; |
| 2097 | outb(status, brdp->ioaddr1); |
| 2098 | break; |
| 2099 | |
| 2100 | case BRD_ECHMC: |
| 2101 | brdp->isr = stl_echmcaintr; |
| 2102 | brdp->ioctrl = brdp->ioaddr1 + 0x20; |
| 2103 | brdp->iostatus = brdp->ioctrl; |
| 2104 | status = inb(brdp->iostatus); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2105 | if ((status & ECH_IDBITMASK) != ECH_ID) { |
| 2106 | retval = -ENODEV; |
| 2107 | goto err; |
| 2108 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2110 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2111 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2112 | brdp->irq, brdp->brdnr); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2113 | retval = -EINVAL; |
| 2114 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | } |
| 2116 | outb(ECHMC_BRDRESET, brdp->ioctrl); |
| 2117 | outb(ECHMC_INTENABLE, brdp->ioctrl); |
| 2118 | brdp->iosize1 = 64; |
| 2119 | name = "serial(EC8/32-MC)"; |
| 2120 | break; |
| 2121 | |
| 2122 | case BRD_ECHPCI: |
| 2123 | brdp->isr = stl_echpciintr; |
| 2124 | brdp->ioctrl = brdp->ioaddr1 + 2; |
| 2125 | brdp->iosize1 = 4; |
| 2126 | brdp->iosize2 = 8; |
| 2127 | name = "serial(EC8/32-PCI)"; |
| 2128 | break; |
| 2129 | |
| 2130 | case BRD_ECH64PCI: |
| 2131 | brdp->isr = stl_echpci64intr; |
| 2132 | brdp->ioctrl = brdp->ioaddr2 + 0x40; |
| 2133 | outb(0x43, (brdp->ioaddr1 + 0x4c)); |
| 2134 | brdp->iosize1 = 0x80; |
| 2135 | brdp->iosize2 = 0x80; |
| 2136 | name = "serial(EC8/64-PCI)"; |
| 2137 | break; |
| 2138 | |
| 2139 | default: |
| 2140 | printk("STALLION: unknown board type=%d\n", brdp->brdtype); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2141 | retval = -EINVAL; |
| 2142 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | } |
| 2144 | |
| 2145 | /* |
| 2146 | * Check boards for possible IO address conflicts and return fail status |
| 2147 | * if an IO conflict found. |
| 2148 | */ |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2149 | retval = -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
| 2151 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
| 2152 | "%x conflicts with another device\n", brdp->brdnr, |
| 2153 | brdp->ioaddr1); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2154 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | } |
| 2156 | |
| 2157 | if (brdp->iosize2 > 0) |
| 2158 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
| 2159 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
| 2160 | "address %x conflicts with another device\n", |
| 2161 | brdp->brdnr, brdp->ioaddr2); |
| 2162 | printk(KERN_WARNING "STALLION: Warning, also " |
| 2163 | "releasing board %d I/O address %x \n", |
| 2164 | brdp->brdnr, brdp->ioaddr1); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2165 | goto err_rel1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | } |
| 2167 | |
| 2168 | /* |
| 2169 | * Scan through the secondary io address space looking for panels. |
| 2170 | * As we find'em allocate and initialize panel structures for each. |
| 2171 | */ |
| 2172 | brdp->clk = CD1400_CLK; |
| 2173 | brdp->hwid = status; |
| 2174 | |
| 2175 | ioaddr = brdp->ioaddr2; |
| 2176 | banknr = 0; |
| 2177 | panelnr = 0; |
| 2178 | nxtid = 0; |
| 2179 | |
| 2180 | for (i = 0; (i < STL_MAXPANELS); i++) { |
| 2181 | if (brdp->brdtype == BRD_ECHPCI) { |
| 2182 | outb(nxtid, brdp->ioctrl); |
| 2183 | ioaddr = brdp->ioaddr2; |
| 2184 | } |
| 2185 | status = inb(ioaddr + ECH_PNLSTATUS); |
| 2186 | if ((status & ECH_PNLIDMASK) != nxtid) |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2187 | goto err_fr; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2188 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 2189 | if (!panelp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | printk("STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2191 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2192 | goto err_fr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | panelp->magic = STL_PANELMAGIC; |
| 2195 | panelp->brdnr = brdp->brdnr; |
| 2196 | panelp->panelnr = panelnr; |
| 2197 | panelp->iobase = ioaddr; |
| 2198 | panelp->pagenr = nxtid; |
| 2199 | panelp->hwid = status; |
| 2200 | brdp->bnk2panel[banknr] = panelp; |
| 2201 | brdp->bnkpageaddr[banknr] = nxtid; |
| 2202 | brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; |
| 2203 | |
| 2204 | if (status & ECH_PNLXPID) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2205 | panelp->uartp = &stl_sc26198uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2206 | panelp->isr = stl_sc26198intr; |
| 2207 | if (status & ECH_PNL16PORT) { |
| 2208 | panelp->nrports = 16; |
| 2209 | brdp->bnk2panel[banknr] = panelp; |
| 2210 | brdp->bnkpageaddr[banknr] = nxtid; |
| 2211 | brdp->bnkstataddr[banknr++] = ioaddr + 4 + |
| 2212 | ECH_PNLSTATUS; |
| 2213 | } else { |
| 2214 | panelp->nrports = 8; |
| 2215 | } |
| 2216 | } else { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2217 | panelp->uartp = &stl_cd1400uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | panelp->isr = stl_cd1400echintr; |
| 2219 | if (status & ECH_PNL16PORT) { |
| 2220 | panelp->nrports = 16; |
| 2221 | panelp->ackmask = 0x80; |
| 2222 | if (brdp->brdtype != BRD_ECHPCI) |
| 2223 | ioaddr += EREG_BANKSIZE; |
| 2224 | brdp->bnk2panel[banknr] = panelp; |
| 2225 | brdp->bnkpageaddr[banknr] = ++nxtid; |
| 2226 | brdp->bnkstataddr[banknr++] = ioaddr + |
| 2227 | ECH_PNLSTATUS; |
| 2228 | } else { |
| 2229 | panelp->nrports = 8; |
| 2230 | panelp->ackmask = 0xc0; |
| 2231 | } |
| 2232 | } |
| 2233 | |
| 2234 | nxtid++; |
| 2235 | ioaddr += EREG_BANKSIZE; |
| 2236 | brdp->nrports += panelp->nrports; |
| 2237 | brdp->panels[panelnr++] = panelp; |
| 2238 | if ((brdp->brdtype != BRD_ECHPCI) && |
| 2239 | (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2240 | goto err_fr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2241 | } |
| 2242 | |
| 2243 | brdp->nrpanels = panelnr; |
| 2244 | brdp->nrbnks = banknr; |
| 2245 | if (brdp->brdtype == BRD_ECH) |
| 2246 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| 2247 | |
| 2248 | brdp->state |= BRD_FOUND; |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 2249 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | printk("STALLION: failed to register interrupt " |
| 2251 | "routine for %s irq=%d\n", name, brdp->irq); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2252 | retval = -ENODEV; |
| 2253 | goto err_fr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | } |
| 2255 | |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2256 | return 0; |
| 2257 | err_fr: |
| 2258 | stl_cleanup_panels(brdp); |
| 2259 | if (brdp->iosize2 > 0) |
| 2260 | release_region(brdp->ioaddr2, brdp->iosize2); |
| 2261 | err_rel1: |
| 2262 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2263 | err: |
| 2264 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2265 | } |
| 2266 | |
| 2267 | /*****************************************************************************/ |
| 2268 | |
| 2269 | /* |
| 2270 | * Initialize and configure the specified board. |
| 2271 | * Scan through all the boards in the configuration and see what we |
| 2272 | * can find. Handle EIO and the ECH boards a little differently here |
| 2273 | * since the initial search and setup is very different. |
| 2274 | */ |
| 2275 | |
Jiri Slaby | 705c186 | 2006-12-08 02:39:11 -0800 | [diff] [blame] | 2276 | static int __devinit stl_brdinit(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2277 | { |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2278 | int i, retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2279 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2280 | pr_debug("stl_brdinit(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2281 | |
| 2282 | switch (brdp->brdtype) { |
| 2283 | case BRD_EASYIO: |
| 2284 | case BRD_EASYIOPCI: |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2285 | retval = stl_initeio(brdp); |
| 2286 | if (retval) |
| 2287 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | break; |
| 2289 | case BRD_ECH: |
| 2290 | case BRD_ECHMC: |
| 2291 | case BRD_ECHPCI: |
| 2292 | case BRD_ECH64PCI: |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2293 | retval = stl_initech(brdp); |
| 2294 | if (retval) |
| 2295 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2296 | break; |
| 2297 | default: |
| 2298 | printk("STALLION: board=%d is unknown board type=%d\n", |
| 2299 | brdp->brdnr, brdp->brdtype); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2300 | retval = -ENODEV; |
| 2301 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2302 | } |
| 2303 | |
| 2304 | stl_brds[brdp->brdnr] = brdp; |
| 2305 | if ((brdp->state & BRD_FOUND) == 0) { |
| 2306 | printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", |
| 2307 | stl_brdnames[brdp->brdtype], brdp->brdnr, |
| 2308 | brdp->ioaddr1, brdp->irq); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2309 | goto err_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2310 | } |
| 2311 | |
| 2312 | for (i = 0; (i < STL_MAXPANELS); i++) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2313 | if (brdp->panels[i] != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | stl_initports(brdp, brdp->panels[i]); |
| 2315 | |
| 2316 | printk("STALLION: %s found, board=%d io=%x irq=%d " |
| 2317 | "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], |
| 2318 | brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, |
| 2319 | brdp->nrports); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2320 | |
| 2321 | return 0; |
| 2322 | err_free: |
| 2323 | free_irq(brdp->irq, brdp); |
| 2324 | |
| 2325 | stl_cleanup_panels(brdp); |
| 2326 | |
| 2327 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2328 | if (brdp->iosize2 > 0) |
| 2329 | release_region(brdp->ioaddr2, brdp->iosize2); |
| 2330 | |
| 2331 | stl_brds[brdp->brdnr] = NULL; |
| 2332 | err: |
| 2333 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | } |
| 2335 | |
| 2336 | /*****************************************************************************/ |
| 2337 | |
| 2338 | /* |
| 2339 | * Find the next available board number that is free. |
| 2340 | */ |
| 2341 | |
Jiri Slaby | 705c186 | 2006-12-08 02:39:11 -0800 | [diff] [blame] | 2342 | static int __devinit stl_getbrdnr(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | { |
| 2344 | int i; |
| 2345 | |
| 2346 | for (i = 0; (i < STL_MAXBRDS); i++) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2347 | if (stl_brds[i] == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | if (i >= stl_nrbrds) |
| 2349 | stl_nrbrds = i + 1; |
| 2350 | return(i); |
| 2351 | } |
| 2352 | } |
| 2353 | return(-1); |
| 2354 | } |
| 2355 | |
| 2356 | /*****************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | /* |
| 2358 | * We have a Stallion board. Allocate a board structure and |
| 2359 | * initialize it. Read its IO and IRQ resources from PCI |
| 2360 | * configuration space. |
| 2361 | */ |
| 2362 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2363 | static int __devinit stl_pciprobe(struct pci_dev *pdev, |
| 2364 | const struct pci_device_id *ent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | { |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2366 | struct stlbrd *brdp; |
| 2367 | unsigned int brdtype = ent->driver_data; |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2368 | int retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2370 | if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2371 | goto err; |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2372 | |
| 2373 | dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n", |
| 2374 | pdev->vendor, pdev->device, pdev->class); |
| 2375 | |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2376 | retval = pci_enable_device(pdev); |
| 2377 | if (retval) |
| 2378 | goto err; |
| 2379 | brdp = stl_allocbrd(); |
| 2380 | if (brdp == NULL) { |
| 2381 | retval = -ENOMEM; |
| 2382 | goto err; |
| 2383 | } |
| 2384 | brdp->brdnr = stl_getbrdnr(); |
| 2385 | if (brdp->brdnr < 0) { |
Jiri Slaby | fefaf9a | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2386 | dev_err(&pdev->dev, "too many boards found, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2387 | "maximum supported %d\n", STL_MAXBRDS); |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2388 | goto err_fr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2389 | } |
| 2390 | brdp->brdtype = brdtype; |
| 2391 | |
| 2392 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | * We have all resources from the board, so let's setup the actual |
| 2394 | * board structure now. |
| 2395 | */ |
| 2396 | switch (brdtype) { |
| 2397 | case BRD_ECHPCI: |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2398 | brdp->ioaddr2 = pci_resource_start(pdev, 0); |
| 2399 | brdp->ioaddr1 = pci_resource_start(pdev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2400 | break; |
| 2401 | case BRD_ECH64PCI: |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2402 | brdp->ioaddr2 = pci_resource_start(pdev, 2); |
| 2403 | brdp->ioaddr1 = pci_resource_start(pdev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | break; |
| 2405 | case BRD_EASYIOPCI: |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2406 | brdp->ioaddr1 = pci_resource_start(pdev, 2); |
| 2407 | brdp->ioaddr2 = pci_resource_start(pdev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | break; |
| 2409 | default: |
Jiri Slaby | fefaf9a | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2410 | dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | break; |
| 2412 | } |
| 2413 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2414 | brdp->irq = pdev->irq; |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2415 | retval = stl_brdinit(brdp); |
| 2416 | if (retval) |
| 2417 | goto err_fr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2418 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2419 | pci_set_drvdata(pdev, brdp); |
| 2420 | |
Jiri Slaby | 3b85b34 | 2006-12-08 02:39:10 -0800 | [diff] [blame] | 2421 | return 0; |
| 2422 | err_fr: |
| 2423 | kfree(brdp); |
| 2424 | err: |
| 2425 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | } |
| 2427 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2428 | static void __devexit stl_pciremove(struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | { |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2430 | struct stlbrd *brdp = pci_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2432 | free_irq(brdp->irq, brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2433 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2434 | stl_cleanup_panels(brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2436 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2437 | if (brdp->iosize2 > 0) |
| 2438 | release_region(brdp->ioaddr2, brdp->iosize2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2440 | stl_brds[brdp->brdnr] = NULL; |
| 2441 | kfree(brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2442 | } |
| 2443 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 2444 | static struct pci_driver stl_pcidriver = { |
| 2445 | .name = "stallion", |
| 2446 | .id_table = stl_pcibrds, |
| 2447 | .probe = stl_pciprobe, |
| 2448 | .remove = __devexit_p(stl_pciremove) |
| 2449 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2450 | |
| 2451 | /*****************************************************************************/ |
| 2452 | |
| 2453 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | * Return the board stats structure to user app. |
| 2455 | */ |
| 2456 | |
| 2457 | static int stl_getbrdstats(combrd_t __user *bp) |
| 2458 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2459 | struct stlbrd *brdp; |
| 2460 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | int i; |
| 2462 | |
| 2463 | if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) |
| 2464 | return -EFAULT; |
| 2465 | if (stl_brdstats.brd >= STL_MAXBRDS) |
| 2466 | return(-ENODEV); |
| 2467 | brdp = stl_brds[stl_brdstats.brd]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2468 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | return(-ENODEV); |
| 2470 | |
| 2471 | memset(&stl_brdstats, 0, sizeof(combrd_t)); |
| 2472 | stl_brdstats.brd = brdp->brdnr; |
| 2473 | stl_brdstats.type = brdp->brdtype; |
| 2474 | stl_brdstats.hwid = brdp->hwid; |
| 2475 | stl_brdstats.state = brdp->state; |
| 2476 | stl_brdstats.ioaddr = brdp->ioaddr1; |
| 2477 | stl_brdstats.ioaddr2 = brdp->ioaddr2; |
| 2478 | stl_brdstats.irq = brdp->irq; |
| 2479 | stl_brdstats.nrpanels = brdp->nrpanels; |
| 2480 | stl_brdstats.nrports = brdp->nrports; |
| 2481 | for (i = 0; (i < brdp->nrpanels); i++) { |
| 2482 | panelp = brdp->panels[i]; |
| 2483 | stl_brdstats.panels[i].panel = i; |
| 2484 | stl_brdstats.panels[i].hwid = panelp->hwid; |
| 2485 | stl_brdstats.panels[i].nrports = panelp->nrports; |
| 2486 | } |
| 2487 | |
| 2488 | return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; |
| 2489 | } |
| 2490 | |
| 2491 | /*****************************************************************************/ |
| 2492 | |
| 2493 | /* |
| 2494 | * Resolve the referenced port number into a port struct pointer. |
| 2495 | */ |
| 2496 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2497 | static struct stlport *stl_getport(int brdnr, int panelnr, int portnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2499 | struct stlbrd *brdp; |
| 2500 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2501 | |
| 2502 | if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2503 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2504 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2505 | if (brdp == NULL) |
| 2506 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2508 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | panelp = brdp->panels[panelnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2510 | if (panelp == NULL) |
| 2511 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | if ((portnr < 0) || (portnr >= panelp->nrports)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2513 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | return(panelp->ports[portnr]); |
| 2515 | } |
| 2516 | |
| 2517 | /*****************************************************************************/ |
| 2518 | |
| 2519 | /* |
| 2520 | * Return the port stats structure to user app. A NULL port struct |
| 2521 | * pointer passed in means that we need to find out from the app |
| 2522 | * what port to get stats for (used through board control device). |
| 2523 | */ |
| 2524 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2525 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2526 | { |
| 2527 | unsigned char *head, *tail; |
| 2528 | unsigned long flags; |
| 2529 | |
| 2530 | if (!portp) { |
| 2531 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| 2532 | return -EFAULT; |
| 2533 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| 2534 | stl_comstats.port); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2535 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | return(-ENODEV); |
| 2537 | } |
| 2538 | |
| 2539 | portp->stats.state = portp->istate; |
| 2540 | portp->stats.flags = portp->flags; |
| 2541 | portp->stats.hwid = portp->hwid; |
| 2542 | |
| 2543 | portp->stats.ttystate = 0; |
| 2544 | portp->stats.cflags = 0; |
| 2545 | portp->stats.iflags = 0; |
| 2546 | portp->stats.oflags = 0; |
| 2547 | portp->stats.lflags = 0; |
| 2548 | portp->stats.rxbuffered = 0; |
| 2549 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2550 | spin_lock_irqsave(&stallion_lock, flags); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2551 | if (portp->tty != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | if (portp->tty->driver_data == portp) { |
| 2553 | portp->stats.ttystate = portp->tty->flags; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2554 | /* No longer available as a statistic */ |
| 2555 | portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */ |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2556 | if (portp->tty->termios != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | portp->stats.cflags = portp->tty->termios->c_cflag; |
| 2558 | portp->stats.iflags = portp->tty->termios->c_iflag; |
| 2559 | portp->stats.oflags = portp->tty->termios->c_oflag; |
| 2560 | portp->stats.lflags = portp->tty->termios->c_lflag; |
| 2561 | } |
| 2562 | } |
| 2563 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2564 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | |
| 2566 | head = portp->tx.head; |
| 2567 | tail = portp->tx.tail; |
| 2568 | portp->stats.txbuffered = ((head >= tail) ? (head - tail) : |
| 2569 | (STL_TXBUFSIZE - (tail - head))); |
| 2570 | |
| 2571 | portp->stats.signals = (unsigned long) stl_getsignals(portp); |
| 2572 | |
| 2573 | return copy_to_user(cp, &portp->stats, |
| 2574 | sizeof(comstats_t)) ? -EFAULT : 0; |
| 2575 | } |
| 2576 | |
| 2577 | /*****************************************************************************/ |
| 2578 | |
| 2579 | /* |
| 2580 | * Clear the port stats structure. We also return it zeroed out... |
| 2581 | */ |
| 2582 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2583 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2584 | { |
| 2585 | if (!portp) { |
| 2586 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| 2587 | return -EFAULT; |
| 2588 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| 2589 | stl_comstats.port); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2590 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2591 | return(-ENODEV); |
| 2592 | } |
| 2593 | |
| 2594 | memset(&portp->stats, 0, sizeof(comstats_t)); |
| 2595 | portp->stats.brd = portp->brdnr; |
| 2596 | portp->stats.panel = portp->panelnr; |
| 2597 | portp->stats.port = portp->portnr; |
| 2598 | return copy_to_user(cp, &portp->stats, |
| 2599 | sizeof(comstats_t)) ? -EFAULT : 0; |
| 2600 | } |
| 2601 | |
| 2602 | /*****************************************************************************/ |
| 2603 | |
| 2604 | /* |
| 2605 | * Return the entire driver ports structure to a user app. |
| 2606 | */ |
| 2607 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2608 | static int stl_getportstruct(struct stlport __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2610 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2612 | if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | return -EFAULT; |
| 2614 | portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, |
| 2615 | stl_dummyport.portnr); |
| 2616 | if (!portp) |
| 2617 | return -ENODEV; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2618 | return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | } |
| 2620 | |
| 2621 | /*****************************************************************************/ |
| 2622 | |
| 2623 | /* |
| 2624 | * Return the entire driver board structure to a user app. |
| 2625 | */ |
| 2626 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2627 | static int stl_getbrdstruct(struct stlbrd __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2628 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2629 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2631 | if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | return -EFAULT; |
| 2633 | if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) |
| 2634 | return -ENODEV; |
| 2635 | brdp = stl_brds[stl_dummybrd.brdnr]; |
| 2636 | if (!brdp) |
| 2637 | return(-ENODEV); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2638 | return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | } |
| 2640 | |
| 2641 | /*****************************************************************************/ |
| 2642 | |
| 2643 | /* |
| 2644 | * The "staliomem" device is also required to do some special operations |
| 2645 | * on the board and/or ports. In this driver it is mostly used for stats |
| 2646 | * collection. |
| 2647 | */ |
| 2648 | |
| 2649 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) |
| 2650 | { |
| 2651 | int brdnr, rc; |
| 2652 | void __user *argp = (void __user *)arg; |
| 2653 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2654 | pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2655 | |
| 2656 | brdnr = iminor(ip); |
| 2657 | if (brdnr >= STL_MAXBRDS) |
| 2658 | return(-ENODEV); |
| 2659 | rc = 0; |
| 2660 | |
| 2661 | switch (cmd) { |
| 2662 | case COM_GETPORTSTATS: |
| 2663 | rc = stl_getportstats(NULL, argp); |
| 2664 | break; |
| 2665 | case COM_CLRPORTSTATS: |
| 2666 | rc = stl_clrportstats(NULL, argp); |
| 2667 | break; |
| 2668 | case COM_GETBRDSTATS: |
| 2669 | rc = stl_getbrdstats(argp); |
| 2670 | break; |
| 2671 | case COM_READPORT: |
| 2672 | rc = stl_getportstruct(argp); |
| 2673 | break; |
| 2674 | case COM_READBOARD: |
| 2675 | rc = stl_getbrdstruct(argp); |
| 2676 | break; |
| 2677 | default: |
| 2678 | rc = -ENOIOCTLCMD; |
| 2679 | break; |
| 2680 | } |
| 2681 | |
| 2682 | return(rc); |
| 2683 | } |
| 2684 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2685 | static const struct tty_operations stl_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | .open = stl_open, |
| 2687 | .close = stl_close, |
| 2688 | .write = stl_write, |
| 2689 | .put_char = stl_putchar, |
| 2690 | .flush_chars = stl_flushchars, |
| 2691 | .write_room = stl_writeroom, |
| 2692 | .chars_in_buffer = stl_charsinbuffer, |
| 2693 | .ioctl = stl_ioctl, |
| 2694 | .set_termios = stl_settermios, |
| 2695 | .throttle = stl_throttle, |
| 2696 | .unthrottle = stl_unthrottle, |
| 2697 | .stop = stl_stop, |
| 2698 | .start = stl_start, |
| 2699 | .hangup = stl_hangup, |
| 2700 | .flush_buffer = stl_flushbuffer, |
| 2701 | .break_ctl = stl_breakctl, |
| 2702 | .wait_until_sent = stl_waituntilsent, |
| 2703 | .send_xchar = stl_sendxchar, |
| 2704 | .read_proc = stl_readproc, |
| 2705 | .tiocmget = stl_tiocmget, |
| 2706 | .tiocmset = stl_tiocmset, |
| 2707 | }; |
| 2708 | |
| 2709 | /*****************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2710 | /* CD1400 HARDWARE FUNCTIONS */ |
| 2711 | /*****************************************************************************/ |
| 2712 | |
| 2713 | /* |
| 2714 | * These functions get/set/update the registers of the cd1400 UARTs. |
| 2715 | * Access to the cd1400 registers is via an address/data io port pair. |
| 2716 | * (Maybe should make this inline...) |
| 2717 | */ |
| 2718 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2719 | static int stl_cd1400getreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2720 | { |
| 2721 | outb((regnr + portp->uartaddr), portp->ioaddr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2722 | return inb(portp->ioaddr + EREG_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2723 | } |
| 2724 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2725 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | { |
| 2727 | outb((regnr + portp->uartaddr), portp->ioaddr); |
| 2728 | outb(value, portp->ioaddr + EREG_DATA); |
| 2729 | } |
| 2730 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2731 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | { |
| 2733 | outb((regnr + portp->uartaddr), portp->ioaddr); |
| 2734 | if (inb(portp->ioaddr + EREG_DATA) != value) { |
| 2735 | outb(value, portp->ioaddr + EREG_DATA); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2736 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2737 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2738 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2739 | } |
| 2740 | |
| 2741 | /*****************************************************************************/ |
| 2742 | |
| 2743 | /* |
| 2744 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
| 2745 | * these ports are on - since the port io registers are almost |
| 2746 | * identical when dealing with ports. |
| 2747 | */ |
| 2748 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2749 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2750 | { |
| 2751 | unsigned int gfrcr; |
| 2752 | int chipmask, i, j; |
| 2753 | int nrchips, uartaddr, ioaddr; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2754 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2755 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2756 | pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2758 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
| 2760 | |
| 2761 | /* |
| 2762 | * Check that each chip is present and started up OK. |
| 2763 | */ |
| 2764 | chipmask = 0; |
| 2765 | nrchips = panelp->nrports / CD1400_PORTS; |
| 2766 | for (i = 0; (i < nrchips); i++) { |
| 2767 | if (brdp->brdtype == BRD_ECHPCI) { |
| 2768 | outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); |
| 2769 | ioaddr = panelp->iobase; |
| 2770 | } else { |
| 2771 | ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); |
| 2772 | } |
| 2773 | uartaddr = (i & 0x01) ? 0x080 : 0; |
| 2774 | outb((GFRCR + uartaddr), ioaddr); |
| 2775 | outb(0, (ioaddr + EREG_DATA)); |
| 2776 | outb((CCR + uartaddr), ioaddr); |
| 2777 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| 2778 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| 2779 | outb((GFRCR + uartaddr), ioaddr); |
| 2780 | for (j = 0; (j < CCR_MAXWAIT); j++) { |
| 2781 | if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) |
| 2782 | break; |
| 2783 | } |
| 2784 | if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { |
| 2785 | printk("STALLION: cd1400 not responding, " |
| 2786 | "brd=%d panel=%d chip=%d\n", |
| 2787 | panelp->brdnr, panelp->panelnr, i); |
| 2788 | continue; |
| 2789 | } |
| 2790 | chipmask |= (0x1 << i); |
| 2791 | outb((PPR + uartaddr), ioaddr); |
| 2792 | outb(PPR_SCALAR, (ioaddr + EREG_DATA)); |
| 2793 | } |
| 2794 | |
| 2795 | BRDDISABLE(panelp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2796 | spin_unlock_irqrestore(&brd_lock, flags); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2797 | return chipmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2798 | } |
| 2799 | |
| 2800 | /*****************************************************************************/ |
| 2801 | |
| 2802 | /* |
| 2803 | * Initialize hardware specific port registers. |
| 2804 | */ |
| 2805 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2806 | static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2807 | { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2808 | unsigned long flags; |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2809 | pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
| 2810 | panelp, portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2811 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2812 | if ((brdp == NULL) || (panelp == NULL) || |
| 2813 | (portp == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2814 | return; |
| 2815 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2816 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
| 2818 | (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); |
| 2819 | portp->uartaddr = (portp->portnr & 0x04) << 5; |
| 2820 | portp->pagenr = panelp->pagenr + (portp->portnr >> 3); |
| 2821 | |
| 2822 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 2823 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 2824 | stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); |
| 2825 | portp->hwid = stl_cd1400getreg(portp, GFRCR); |
| 2826 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2827 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2828 | } |
| 2829 | |
| 2830 | /*****************************************************************************/ |
| 2831 | |
| 2832 | /* |
| 2833 | * Wait for the command register to be ready. We will poll this, |
| 2834 | * since it won't usually take too long to be ready. |
| 2835 | */ |
| 2836 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2837 | static void stl_cd1400ccrwait(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | { |
| 2839 | int i; |
| 2840 | |
| 2841 | for (i = 0; (i < CCR_MAXWAIT); i++) { |
| 2842 | if (stl_cd1400getreg(portp, CCR) == 0) { |
| 2843 | return; |
| 2844 | } |
| 2845 | } |
| 2846 | |
| 2847 | printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", |
| 2848 | portp->portnr, portp->panelnr, portp->brdnr); |
| 2849 | } |
| 2850 | |
| 2851 | /*****************************************************************************/ |
| 2852 | |
| 2853 | /* |
| 2854 | * Set up the cd1400 registers for a port based on the termios port |
| 2855 | * settings. |
| 2856 | */ |
| 2857 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2858 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2860 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2861 | unsigned long flags; |
| 2862 | unsigned int clkdiv, baudrate; |
| 2863 | unsigned char cor1, cor2, cor3; |
| 2864 | unsigned char cor4, cor5, ccr; |
| 2865 | unsigned char srer, sreron, sreroff; |
| 2866 | unsigned char mcor1, mcor2, rtpr; |
| 2867 | unsigned char clk, div; |
| 2868 | |
| 2869 | cor1 = 0; |
| 2870 | cor2 = 0; |
| 2871 | cor3 = 0; |
| 2872 | cor4 = 0; |
| 2873 | cor5 = 0; |
| 2874 | ccr = 0; |
| 2875 | rtpr = 0; |
| 2876 | clk = 0; |
| 2877 | div = 0; |
| 2878 | mcor1 = 0; |
| 2879 | mcor2 = 0; |
| 2880 | sreron = 0; |
| 2881 | sreroff = 0; |
| 2882 | |
| 2883 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2884 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2885 | return; |
| 2886 | |
| 2887 | /* |
| 2888 | * Set up the RX char ignore mask with those RX error types we |
| 2889 | * can ignore. We can get the cd1400 to help us out a little here, |
| 2890 | * it will ignore parity errors and breaks for us. |
| 2891 | */ |
| 2892 | portp->rxignoremsk = 0; |
| 2893 | if (tiosp->c_iflag & IGNPAR) { |
| 2894 | portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); |
| 2895 | cor1 |= COR1_PARIGNORE; |
| 2896 | } |
| 2897 | if (tiosp->c_iflag & IGNBRK) { |
| 2898 | portp->rxignoremsk |= ST_BREAK; |
| 2899 | cor4 |= COR4_IGNBRK; |
| 2900 | } |
| 2901 | |
| 2902 | portp->rxmarkmsk = ST_OVERRUN; |
| 2903 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
| 2904 | portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); |
| 2905 | if (tiosp->c_iflag & BRKINT) |
| 2906 | portp->rxmarkmsk |= ST_BREAK; |
| 2907 | |
| 2908 | /* |
| 2909 | * Go through the char size, parity and stop bits and set all the |
| 2910 | * option register appropriately. |
| 2911 | */ |
| 2912 | switch (tiosp->c_cflag & CSIZE) { |
| 2913 | case CS5: |
| 2914 | cor1 |= COR1_CHL5; |
| 2915 | break; |
| 2916 | case CS6: |
| 2917 | cor1 |= COR1_CHL6; |
| 2918 | break; |
| 2919 | case CS7: |
| 2920 | cor1 |= COR1_CHL7; |
| 2921 | break; |
| 2922 | default: |
| 2923 | cor1 |= COR1_CHL8; |
| 2924 | break; |
| 2925 | } |
| 2926 | |
| 2927 | if (tiosp->c_cflag & CSTOPB) |
| 2928 | cor1 |= COR1_STOP2; |
| 2929 | else |
| 2930 | cor1 |= COR1_STOP1; |
| 2931 | |
| 2932 | if (tiosp->c_cflag & PARENB) { |
| 2933 | if (tiosp->c_cflag & PARODD) |
| 2934 | cor1 |= (COR1_PARENB | COR1_PARODD); |
| 2935 | else |
| 2936 | cor1 |= (COR1_PARENB | COR1_PAREVEN); |
| 2937 | } else { |
| 2938 | cor1 |= COR1_PARNONE; |
| 2939 | } |
| 2940 | |
| 2941 | /* |
| 2942 | * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing |
| 2943 | * space for hardware flow control and the like. This should be set to |
| 2944 | * VMIN. Also here we will set the RX data timeout to 10ms - this should |
| 2945 | * really be based on VTIME. |
| 2946 | */ |
| 2947 | cor3 |= FIFO_RXTHRESHOLD; |
| 2948 | rtpr = 2; |
| 2949 | |
| 2950 | /* |
| 2951 | * Calculate the baud rate timers. For now we will just assume that |
| 2952 | * the input and output baud are the same. Could have used a baud |
| 2953 | * table here, but this way we can generate virtually any baud rate |
| 2954 | * we like! |
| 2955 | */ |
| 2956 | baudrate = tiosp->c_cflag & CBAUD; |
| 2957 | if (baudrate & CBAUDEX) { |
| 2958 | baudrate &= ~CBAUDEX; |
| 2959 | if ((baudrate < 1) || (baudrate > 4)) |
| 2960 | tiosp->c_cflag &= ~CBAUDEX; |
| 2961 | else |
| 2962 | baudrate += 15; |
| 2963 | } |
| 2964 | baudrate = stl_baudrates[baudrate]; |
| 2965 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
| 2966 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 2967 | baudrate = 57600; |
| 2968 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 2969 | baudrate = 115200; |
| 2970 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 2971 | baudrate = 230400; |
| 2972 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 2973 | baudrate = 460800; |
| 2974 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| 2975 | baudrate = (portp->baud_base / portp->custom_divisor); |
| 2976 | } |
| 2977 | if (baudrate > STL_CD1400MAXBAUD) |
| 2978 | baudrate = STL_CD1400MAXBAUD; |
| 2979 | |
| 2980 | if (baudrate > 0) { |
| 2981 | for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { |
| 2982 | clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); |
| 2983 | if (clkdiv < 0x100) |
| 2984 | break; |
| 2985 | } |
| 2986 | div = (unsigned char) clkdiv; |
| 2987 | } |
| 2988 | |
| 2989 | /* |
| 2990 | * Check what form of modem signaling is required and set it up. |
| 2991 | */ |
| 2992 | if ((tiosp->c_cflag & CLOCAL) == 0) { |
| 2993 | mcor1 |= MCOR1_DCD; |
| 2994 | mcor2 |= MCOR2_DCD; |
| 2995 | sreron |= SRER_MODEM; |
| 2996 | portp->flags |= ASYNC_CHECK_CD; |
| 2997 | } else { |
| 2998 | portp->flags &= ~ASYNC_CHECK_CD; |
| 2999 | } |
| 3000 | |
| 3001 | /* |
| 3002 | * Setup cd1400 enhanced modes if we can. In particular we want to |
| 3003 | * handle as much of the flow control as possible automatically. As |
| 3004 | * well as saving a few CPU cycles it will also greatly improve flow |
| 3005 | * control reliability. |
| 3006 | */ |
| 3007 | if (tiosp->c_iflag & IXON) { |
| 3008 | cor2 |= COR2_TXIBE; |
| 3009 | cor3 |= COR3_SCD12; |
| 3010 | if (tiosp->c_iflag & IXANY) |
| 3011 | cor2 |= COR2_IXM; |
| 3012 | } |
| 3013 | |
| 3014 | if (tiosp->c_cflag & CRTSCTS) { |
| 3015 | cor2 |= COR2_CTSAE; |
| 3016 | mcor1 |= FIFO_RTSTHRESHOLD; |
| 3017 | } |
| 3018 | |
| 3019 | /* |
| 3020 | * All cd1400 register values calculated so go through and set |
| 3021 | * them all up. |
| 3022 | */ |
| 3023 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3024 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | portp->portnr, portp->panelnr, portp->brdnr); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3026 | pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | cor1, cor2, cor3, cor4, cor5); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3028 | pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3029 | mcor1, mcor2, rtpr, sreron, sreroff); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3030 | pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); |
| 3031 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3032 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| 3033 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3034 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3035 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3036 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3037 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); |
| 3038 | srer = stl_cd1400getreg(portp, SRER); |
| 3039 | stl_cd1400setreg(portp, SRER, 0); |
| 3040 | if (stl_cd1400updatereg(portp, COR1, cor1)) |
| 3041 | ccr = 1; |
| 3042 | if (stl_cd1400updatereg(portp, COR2, cor2)) |
| 3043 | ccr = 1; |
| 3044 | if (stl_cd1400updatereg(portp, COR3, cor3)) |
| 3045 | ccr = 1; |
| 3046 | if (ccr) { |
| 3047 | stl_cd1400ccrwait(portp); |
| 3048 | stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); |
| 3049 | } |
| 3050 | stl_cd1400setreg(portp, COR4, cor4); |
| 3051 | stl_cd1400setreg(portp, COR5, cor5); |
| 3052 | stl_cd1400setreg(portp, MCOR1, mcor1); |
| 3053 | stl_cd1400setreg(portp, MCOR2, mcor2); |
| 3054 | if (baudrate > 0) { |
| 3055 | stl_cd1400setreg(portp, TCOR, clk); |
| 3056 | stl_cd1400setreg(portp, TBPR, div); |
| 3057 | stl_cd1400setreg(portp, RCOR, clk); |
| 3058 | stl_cd1400setreg(portp, RBPR, div); |
| 3059 | } |
| 3060 | stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); |
| 3061 | stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); |
| 3062 | stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); |
| 3063 | stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); |
| 3064 | stl_cd1400setreg(portp, RTPR, rtpr); |
| 3065 | mcor1 = stl_cd1400getreg(portp, MSVR1); |
| 3066 | if (mcor1 & MSVR1_DCD) |
| 3067 | portp->sigs |= TIOCM_CD; |
| 3068 | else |
| 3069 | portp->sigs &= ~TIOCM_CD; |
| 3070 | stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); |
| 3071 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3072 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3073 | } |
| 3074 | |
| 3075 | /*****************************************************************************/ |
| 3076 | |
| 3077 | /* |
| 3078 | * Set the state of the DTR and RTS signals. |
| 3079 | */ |
| 3080 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3081 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3082 | { |
| 3083 | unsigned char msvr1, msvr2; |
| 3084 | unsigned long flags; |
| 3085 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3086 | pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n", |
| 3087 | portp, dtr, rts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | |
| 3089 | msvr1 = 0; |
| 3090 | msvr2 = 0; |
| 3091 | if (dtr > 0) |
| 3092 | msvr1 = MSVR1_DTR; |
| 3093 | if (rts > 0) |
| 3094 | msvr2 = MSVR2_RTS; |
| 3095 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3096 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3097 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3098 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3099 | if (rts >= 0) |
| 3100 | stl_cd1400setreg(portp, MSVR2, msvr2); |
| 3101 | if (dtr >= 0) |
| 3102 | stl_cd1400setreg(portp, MSVR1, msvr1); |
| 3103 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3104 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3105 | } |
| 3106 | |
| 3107 | /*****************************************************************************/ |
| 3108 | |
| 3109 | /* |
| 3110 | * Return the state of the signals. |
| 3111 | */ |
| 3112 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3113 | static int stl_cd1400getsignals(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3114 | { |
| 3115 | unsigned char msvr1, msvr2; |
| 3116 | unsigned long flags; |
| 3117 | int sigs; |
| 3118 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3119 | pr_debug("stl_cd1400getsignals(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3120 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3121 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3122 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3123 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3124 | msvr1 = stl_cd1400getreg(portp, MSVR1); |
| 3125 | msvr2 = stl_cd1400getreg(portp, MSVR2); |
| 3126 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3127 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3128 | |
| 3129 | sigs = 0; |
| 3130 | sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; |
| 3131 | sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; |
| 3132 | sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; |
| 3133 | sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; |
| 3134 | #if 0 |
| 3135 | sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; |
| 3136 | sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; |
| 3137 | #else |
| 3138 | sigs |= TIOCM_DSR; |
| 3139 | #endif |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3140 | return sigs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3141 | } |
| 3142 | |
| 3143 | /*****************************************************************************/ |
| 3144 | |
| 3145 | /* |
| 3146 | * Enable/Disable the Transmitter and/or Receiver. |
| 3147 | */ |
| 3148 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3149 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3150 | { |
| 3151 | unsigned char ccr; |
| 3152 | unsigned long flags; |
| 3153 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3154 | pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
| 3155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3156 | ccr = 0; |
| 3157 | |
| 3158 | if (tx == 0) |
| 3159 | ccr |= CCR_TXDISABLE; |
| 3160 | else if (tx > 0) |
| 3161 | ccr |= CCR_TXENABLE; |
| 3162 | if (rx == 0) |
| 3163 | ccr |= CCR_RXDISABLE; |
| 3164 | else if (rx > 0) |
| 3165 | ccr |= CCR_RXENABLE; |
| 3166 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3167 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3169 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3170 | stl_cd1400ccrwait(portp); |
| 3171 | stl_cd1400setreg(portp, CCR, ccr); |
| 3172 | stl_cd1400ccrwait(portp); |
| 3173 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3174 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3175 | } |
| 3176 | |
| 3177 | /*****************************************************************************/ |
| 3178 | |
| 3179 | /* |
| 3180 | * Start/stop the Transmitter and/or Receiver. |
| 3181 | */ |
| 3182 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3183 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3184 | { |
| 3185 | unsigned char sreron, sreroff; |
| 3186 | unsigned long flags; |
| 3187 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3188 | pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3189 | |
| 3190 | sreron = 0; |
| 3191 | sreroff = 0; |
| 3192 | if (tx == 0) |
| 3193 | sreroff |= (SRER_TXDATA | SRER_TXEMPTY); |
| 3194 | else if (tx == 1) |
| 3195 | sreron |= SRER_TXDATA; |
| 3196 | else if (tx >= 2) |
| 3197 | sreron |= SRER_TXEMPTY; |
| 3198 | if (rx == 0) |
| 3199 | sreroff |= SRER_RXDATA; |
| 3200 | else if (rx > 0) |
| 3201 | sreron |= SRER_RXDATA; |
| 3202 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3203 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3204 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3205 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3206 | stl_cd1400setreg(portp, SRER, |
| 3207 | ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); |
| 3208 | BRDDISABLE(portp->brdnr); |
| 3209 | if (tx > 0) |
| 3210 | set_bit(ASYI_TXBUSY, &portp->istate); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3211 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3212 | } |
| 3213 | |
| 3214 | /*****************************************************************************/ |
| 3215 | |
| 3216 | /* |
| 3217 | * Disable all interrupts from this port. |
| 3218 | */ |
| 3219 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3220 | static void stl_cd1400disableintrs(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3221 | { |
| 3222 | unsigned long flags; |
| 3223 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3224 | pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp); |
| 3225 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3226 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3227 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3228 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3229 | stl_cd1400setreg(portp, SRER, 0); |
| 3230 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3231 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3232 | } |
| 3233 | |
| 3234 | /*****************************************************************************/ |
| 3235 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3236 | static void stl_cd1400sendbreak(struct stlport *portp, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | { |
| 3238 | unsigned long flags; |
| 3239 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3240 | pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3241 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3242 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3243 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3244 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3245 | stl_cd1400setreg(portp, SRER, |
| 3246 | ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | |
| 3247 | SRER_TXEMPTY)); |
| 3248 | BRDDISABLE(portp->brdnr); |
| 3249 | portp->brklen = len; |
| 3250 | if (len == 1) |
| 3251 | portp->stats.txbreaks++; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3252 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3253 | } |
| 3254 | |
| 3255 | /*****************************************************************************/ |
| 3256 | |
| 3257 | /* |
| 3258 | * Take flow control actions... |
| 3259 | */ |
| 3260 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3261 | static void stl_cd1400flowctrl(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3262 | { |
| 3263 | struct tty_struct *tty; |
| 3264 | unsigned long flags; |
| 3265 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3266 | pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3267 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3268 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3269 | return; |
| 3270 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3271 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3272 | return; |
| 3273 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3274 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3275 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3276 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3277 | |
| 3278 | if (state) { |
| 3279 | if (tty->termios->c_iflag & IXOFF) { |
| 3280 | stl_cd1400ccrwait(portp); |
| 3281 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| 3282 | portp->stats.rxxon++; |
| 3283 | stl_cd1400ccrwait(portp); |
| 3284 | } |
| 3285 | /* |
| 3286 | * Question: should we return RTS to what it was before? It may |
| 3287 | * have been set by an ioctl... Suppose not, since if you have |
| 3288 | * hardware flow control set then it is pretty silly to go and |
| 3289 | * set the RTS line by hand. |
| 3290 | */ |
| 3291 | if (tty->termios->c_cflag & CRTSCTS) { |
| 3292 | stl_cd1400setreg(portp, MCOR1, |
| 3293 | (stl_cd1400getreg(portp, MCOR1) | |
| 3294 | FIFO_RTSTHRESHOLD)); |
| 3295 | stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); |
| 3296 | portp->stats.rxrtson++; |
| 3297 | } |
| 3298 | } else { |
| 3299 | if (tty->termios->c_iflag & IXOFF) { |
| 3300 | stl_cd1400ccrwait(portp); |
| 3301 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| 3302 | portp->stats.rxxoff++; |
| 3303 | stl_cd1400ccrwait(portp); |
| 3304 | } |
| 3305 | if (tty->termios->c_cflag & CRTSCTS) { |
| 3306 | stl_cd1400setreg(portp, MCOR1, |
| 3307 | (stl_cd1400getreg(portp, MCOR1) & 0xf0)); |
| 3308 | stl_cd1400setreg(portp, MSVR2, 0); |
| 3309 | portp->stats.rxrtsoff++; |
| 3310 | } |
| 3311 | } |
| 3312 | |
| 3313 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3314 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3315 | } |
| 3316 | |
| 3317 | /*****************************************************************************/ |
| 3318 | |
| 3319 | /* |
| 3320 | * Send a flow control character... |
| 3321 | */ |
| 3322 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3323 | static void stl_cd1400sendflow(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3324 | { |
| 3325 | struct tty_struct *tty; |
| 3326 | unsigned long flags; |
| 3327 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3328 | pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3329 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3330 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3331 | return; |
| 3332 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3333 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3334 | return; |
| 3335 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3336 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3337 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3338 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3339 | if (state) { |
| 3340 | stl_cd1400ccrwait(portp); |
| 3341 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| 3342 | portp->stats.rxxon++; |
| 3343 | stl_cd1400ccrwait(portp); |
| 3344 | } else { |
| 3345 | stl_cd1400ccrwait(portp); |
| 3346 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| 3347 | portp->stats.rxxoff++; |
| 3348 | stl_cd1400ccrwait(portp); |
| 3349 | } |
| 3350 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3351 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3352 | } |
| 3353 | |
| 3354 | /*****************************************************************************/ |
| 3355 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3356 | static void stl_cd1400flush(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3357 | { |
| 3358 | unsigned long flags; |
| 3359 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3360 | pr_debug("stl_cd1400flush(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3361 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3362 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3363 | return; |
| 3364 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3365 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3366 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3367 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3368 | stl_cd1400ccrwait(portp); |
| 3369 | stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); |
| 3370 | stl_cd1400ccrwait(portp); |
| 3371 | portp->tx.tail = portp->tx.head; |
| 3372 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3373 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3374 | } |
| 3375 | |
| 3376 | /*****************************************************************************/ |
| 3377 | |
| 3378 | /* |
| 3379 | * Return the current state of data flow on this port. This is only |
| 3380 | * really interresting when determining if data has fully completed |
| 3381 | * transmission or not... This is easy for the cd1400, it accurately |
| 3382 | * maintains the busy port flag. |
| 3383 | */ |
| 3384 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3385 | static int stl_cd1400datastate(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3386 | { |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3387 | pr_debug("stl_cd1400datastate(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3388 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3389 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3390 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3391 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3392 | return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3393 | } |
| 3394 | |
| 3395 | /*****************************************************************************/ |
| 3396 | |
| 3397 | /* |
| 3398 | * Interrupt service routine for cd1400 EasyIO boards. |
| 3399 | */ |
| 3400 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3401 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3402 | { |
| 3403 | unsigned char svrtype; |
| 3404 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3405 | pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3406 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3407 | spin_lock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3408 | outb(SVRR, iobase); |
| 3409 | svrtype = inb(iobase + EREG_DATA); |
| 3410 | if (panelp->nrports > 4) { |
| 3411 | outb((SVRR + 0x80), iobase); |
| 3412 | svrtype |= inb(iobase + EREG_DATA); |
| 3413 | } |
| 3414 | |
| 3415 | if (svrtype & SVRR_RX) |
| 3416 | stl_cd1400rxisr(panelp, iobase); |
| 3417 | else if (svrtype & SVRR_TX) |
| 3418 | stl_cd1400txisr(panelp, iobase); |
| 3419 | else if (svrtype & SVRR_MDM) |
| 3420 | stl_cd1400mdmisr(panelp, iobase); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3421 | |
| 3422 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3423 | } |
| 3424 | |
| 3425 | /*****************************************************************************/ |
| 3426 | |
| 3427 | /* |
| 3428 | * Interrupt service routine for cd1400 panels. |
| 3429 | */ |
| 3430 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3431 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3432 | { |
| 3433 | unsigned char svrtype; |
| 3434 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3435 | pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3436 | |
| 3437 | outb(SVRR, iobase); |
| 3438 | svrtype = inb(iobase + EREG_DATA); |
| 3439 | outb((SVRR + 0x80), iobase); |
| 3440 | svrtype |= inb(iobase + EREG_DATA); |
| 3441 | if (svrtype & SVRR_RX) |
| 3442 | stl_cd1400rxisr(panelp, iobase); |
| 3443 | else if (svrtype & SVRR_TX) |
| 3444 | stl_cd1400txisr(panelp, iobase); |
| 3445 | else if (svrtype & SVRR_MDM) |
| 3446 | stl_cd1400mdmisr(panelp, iobase); |
| 3447 | } |
| 3448 | |
| 3449 | |
| 3450 | /*****************************************************************************/ |
| 3451 | |
| 3452 | /* |
| 3453 | * Unfortunately we need to handle breaks in the TX data stream, since |
| 3454 | * this is the only way to generate them on the cd1400. |
| 3455 | */ |
| 3456 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 3457 | static int stl_cd1400breakisr(struct stlport *portp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3458 | { |
| 3459 | if (portp->brklen == 1) { |
| 3460 | outb((COR2 + portp->uartaddr), ioaddr); |
| 3461 | outb((inb(ioaddr + EREG_DATA) | COR2_ETC), |
| 3462 | (ioaddr + EREG_DATA)); |
| 3463 | outb((TDR + portp->uartaddr), ioaddr); |
| 3464 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| 3465 | outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); |
| 3466 | outb((SRER + portp->uartaddr), ioaddr); |
| 3467 | outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), |
| 3468 | (ioaddr + EREG_DATA)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3469 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3470 | } else if (portp->brklen > 1) { |
| 3471 | outb((TDR + portp->uartaddr), ioaddr); |
| 3472 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| 3473 | outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); |
| 3474 | portp->brklen = -1; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3475 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3476 | } else { |
| 3477 | outb((COR2 + portp->uartaddr), ioaddr); |
| 3478 | outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), |
| 3479 | (ioaddr + EREG_DATA)); |
| 3480 | portp->brklen = 0; |
| 3481 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3482 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3483 | } |
| 3484 | |
| 3485 | /*****************************************************************************/ |
| 3486 | |
| 3487 | /* |
| 3488 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
| 3489 | * chars is pretty simple, stuff as many as possible from the TX buffer |
| 3490 | * into the cd1400 FIFO. Must also handle TX breaks here, since they |
| 3491 | * are embedded as commands in the data stream. Oh no, had to use a goto! |
| 3492 | * This could be optimized more, will do when I get time... |
| 3493 | * In practice it is possible that interrupts are enabled but that the |
| 3494 | * port has been hung up. Need to handle not having any TX buffer here, |
| 3495 | * this is done by using the side effect that head and tail will also |
| 3496 | * be NULL if the buffer has been freed. |
| 3497 | */ |
| 3498 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3499 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3500 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3501 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3502 | int len, stlen; |
| 3503 | char *head, *tail; |
| 3504 | unsigned char ioack, srer; |
| 3505 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3506 | pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3507 | |
| 3508 | ioack = inb(ioaddr + EREG_TXACK); |
| 3509 | if (((ioack & panelp->ackmask) != 0) || |
| 3510 | ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { |
| 3511 | printk("STALLION: bad TX interrupt ack value=%x\n", ioack); |
| 3512 | return; |
| 3513 | } |
| 3514 | portp = panelp->ports[(ioack >> 3)]; |
| 3515 | |
| 3516 | /* |
| 3517 | * Unfortunately we need to handle breaks in the data stream, since |
| 3518 | * this is the only way to generate them on the cd1400. Do it now if |
| 3519 | * a break is to be sent. |
| 3520 | */ |
| 3521 | if (portp->brklen != 0) |
| 3522 | if (stl_cd1400breakisr(portp, ioaddr)) |
| 3523 | goto stl_txalldone; |
| 3524 | |
| 3525 | head = portp->tx.head; |
| 3526 | tail = portp->tx.tail; |
| 3527 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 3528 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
| 3529 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| 3530 | set_bit(ASYI_TXLOW, &portp->istate); |
| 3531 | schedule_work(&portp->tqueue); |
| 3532 | } |
| 3533 | |
| 3534 | if (len == 0) { |
| 3535 | outb((SRER + portp->uartaddr), ioaddr); |
| 3536 | srer = inb(ioaddr + EREG_DATA); |
| 3537 | if (srer & SRER_TXDATA) { |
| 3538 | srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; |
| 3539 | } else { |
| 3540 | srer &= ~(SRER_TXDATA | SRER_TXEMPTY); |
| 3541 | clear_bit(ASYI_TXBUSY, &portp->istate); |
| 3542 | } |
| 3543 | outb(srer, (ioaddr + EREG_DATA)); |
| 3544 | } else { |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 3545 | len = min(len, CD1400_TXFIFOSIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3546 | portp->stats.txtotal += len; |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 3547 | stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3548 | outb((TDR + portp->uartaddr), ioaddr); |
| 3549 | outsb((ioaddr + EREG_DATA), tail, stlen); |
| 3550 | len -= stlen; |
| 3551 | tail += stlen; |
| 3552 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 3553 | tail = portp->tx.buf; |
| 3554 | if (len > 0) { |
| 3555 | outsb((ioaddr + EREG_DATA), tail, len); |
| 3556 | tail += len; |
| 3557 | } |
| 3558 | portp->tx.tail = tail; |
| 3559 | } |
| 3560 | |
| 3561 | stl_txalldone: |
| 3562 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3563 | outb(0, (ioaddr + EREG_DATA)); |
| 3564 | } |
| 3565 | |
| 3566 | /*****************************************************************************/ |
| 3567 | |
| 3568 | /* |
| 3569 | * Receive character interrupt handler. Determine if we have good chars |
| 3570 | * or bad chars and then process appropriately. Good chars are easy |
| 3571 | * just shove the lot into the RX buffer and set all status byte to 0. |
| 3572 | * If a bad RX char then process as required. This routine needs to be |
| 3573 | * fast! In practice it is possible that we get an interrupt on a port |
| 3574 | * that is closed. This can happen on hangups - since they completely |
| 3575 | * shutdown a port not in user context. Need to handle this case. |
| 3576 | */ |
| 3577 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3578 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3579 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3580 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3581 | struct tty_struct *tty; |
| 3582 | unsigned int ioack, len, buflen; |
| 3583 | unsigned char status; |
| 3584 | char ch; |
| 3585 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3586 | pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3587 | |
| 3588 | ioack = inb(ioaddr + EREG_RXACK); |
| 3589 | if ((ioack & panelp->ackmask) != 0) { |
| 3590 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| 3591 | return; |
| 3592 | } |
| 3593 | portp = panelp->ports[(ioack >> 3)]; |
| 3594 | tty = portp->tty; |
| 3595 | |
| 3596 | if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { |
| 3597 | outb((RDCR + portp->uartaddr), ioaddr); |
| 3598 | len = inb(ioaddr + EREG_DATA); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3599 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 3600 | len = min(len, sizeof(stl_unwanted)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3601 | outb((RDSR + portp->uartaddr), ioaddr); |
| 3602 | insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); |
| 3603 | portp->stats.rxlost += len; |
| 3604 | portp->stats.rxtotal += len; |
| 3605 | } else { |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 3606 | len = min(len, buflen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3607 | if (len > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3608 | unsigned char *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3609 | outb((RDSR + portp->uartaddr), ioaddr); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3610 | tty_prepare_flip_string(tty, &ptr, len); |
| 3611 | insb((ioaddr + EREG_DATA), ptr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3612 | tty_schedule_flip(tty); |
| 3613 | portp->stats.rxtotal += len; |
| 3614 | } |
| 3615 | } |
| 3616 | } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { |
| 3617 | outb((RDSR + portp->uartaddr), ioaddr); |
| 3618 | status = inb(ioaddr + EREG_DATA); |
| 3619 | ch = inb(ioaddr + EREG_DATA); |
| 3620 | if (status & ST_PARITY) |
| 3621 | portp->stats.rxparity++; |
| 3622 | if (status & ST_FRAMING) |
| 3623 | portp->stats.rxframing++; |
| 3624 | if (status & ST_OVERRUN) |
| 3625 | portp->stats.rxoverrun++; |
| 3626 | if (status & ST_BREAK) |
| 3627 | portp->stats.rxbreaks++; |
| 3628 | if (status & ST_SCHARMASK) { |
| 3629 | if ((status & ST_SCHARMASK) == ST_SCHAR1) |
| 3630 | portp->stats.txxon++; |
| 3631 | if ((status & ST_SCHARMASK) == ST_SCHAR2) |
| 3632 | portp->stats.txxoff++; |
| 3633 | goto stl_rxalldone; |
| 3634 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3635 | if (tty != NULL && (portp->rxignoremsk & status) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3636 | if (portp->rxmarkmsk & status) { |
| 3637 | if (status & ST_BREAK) { |
| 3638 | status = TTY_BREAK; |
| 3639 | if (portp->flags & ASYNC_SAK) { |
| 3640 | do_SAK(tty); |
| 3641 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3642 | } |
| 3643 | } else if (status & ST_PARITY) { |
| 3644 | status = TTY_PARITY; |
| 3645 | } else if (status & ST_FRAMING) { |
| 3646 | status = TTY_FRAME; |
| 3647 | } else if(status & ST_OVERRUN) { |
| 3648 | status = TTY_OVERRUN; |
| 3649 | } else { |
| 3650 | status = 0; |
| 3651 | } |
| 3652 | } else { |
| 3653 | status = 0; |
| 3654 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3655 | tty_insert_flip_char(tty, ch, status); |
| 3656 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3657 | } |
| 3658 | } else { |
| 3659 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| 3660 | return; |
| 3661 | } |
| 3662 | |
| 3663 | stl_rxalldone: |
| 3664 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3665 | outb(0, (ioaddr + EREG_DATA)); |
| 3666 | } |
| 3667 | |
| 3668 | /*****************************************************************************/ |
| 3669 | |
| 3670 | /* |
| 3671 | * Modem interrupt handler. The is called when the modem signal line |
| 3672 | * (DCD) has changed state. Leave most of the work to the off-level |
| 3673 | * processing routine. |
| 3674 | */ |
| 3675 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3676 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3677 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3678 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3679 | unsigned int ioack; |
| 3680 | unsigned char misr; |
| 3681 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3682 | pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3683 | |
| 3684 | ioack = inb(ioaddr + EREG_MDACK); |
| 3685 | if (((ioack & panelp->ackmask) != 0) || |
| 3686 | ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { |
| 3687 | printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); |
| 3688 | return; |
| 3689 | } |
| 3690 | portp = panelp->ports[(ioack >> 3)]; |
| 3691 | |
| 3692 | outb((MISR + portp->uartaddr), ioaddr); |
| 3693 | misr = inb(ioaddr + EREG_DATA); |
| 3694 | if (misr & MISR_DCD) { |
| 3695 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
| 3696 | schedule_work(&portp->tqueue); |
| 3697 | portp->stats.modem++; |
| 3698 | } |
| 3699 | |
| 3700 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3701 | outb(0, (ioaddr + EREG_DATA)); |
| 3702 | } |
| 3703 | |
| 3704 | /*****************************************************************************/ |
| 3705 | /* SC26198 HARDWARE FUNCTIONS */ |
| 3706 | /*****************************************************************************/ |
| 3707 | |
| 3708 | /* |
| 3709 | * These functions get/set/update the registers of the sc26198 UARTs. |
| 3710 | * Access to the sc26198 registers is via an address/data io port pair. |
| 3711 | * (Maybe should make this inline...) |
| 3712 | */ |
| 3713 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3714 | static int stl_sc26198getreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3715 | { |
| 3716 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3717 | return inb(portp->ioaddr + XP_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3718 | } |
| 3719 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3720 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3721 | { |
| 3722 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| 3723 | outb(value, (portp->ioaddr + XP_DATA)); |
| 3724 | } |
| 3725 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3726 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3727 | { |
| 3728 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| 3729 | if (inb(portp->ioaddr + XP_DATA) != value) { |
| 3730 | outb(value, (portp->ioaddr + XP_DATA)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3731 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3732 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3733 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3734 | } |
| 3735 | |
| 3736 | /*****************************************************************************/ |
| 3737 | |
| 3738 | /* |
| 3739 | * Functions to get and set the sc26198 global registers. |
| 3740 | */ |
| 3741 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3742 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3743 | { |
| 3744 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3745 | return inb(portp->ioaddr + XP_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3746 | } |
| 3747 | |
| 3748 | #if 0 |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3749 | static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3750 | { |
| 3751 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
| 3752 | outb(value, (portp->ioaddr + XP_DATA)); |
| 3753 | } |
| 3754 | #endif |
| 3755 | |
| 3756 | /*****************************************************************************/ |
| 3757 | |
| 3758 | /* |
| 3759 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
| 3760 | * these ports are on - since the port io registers are almost |
| 3761 | * identical when dealing with ports. |
| 3762 | */ |
| 3763 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3764 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3765 | { |
| 3766 | int chipmask, i; |
| 3767 | int nrchips, ioaddr; |
| 3768 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3769 | pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3770 | |
| 3771 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
| 3772 | |
| 3773 | /* |
| 3774 | * Check that each chip is present and started up OK. |
| 3775 | */ |
| 3776 | chipmask = 0; |
| 3777 | nrchips = (panelp->nrports + 4) / SC26198_PORTS; |
| 3778 | if (brdp->brdtype == BRD_ECHPCI) |
| 3779 | outb(panelp->pagenr, brdp->ioctrl); |
| 3780 | |
| 3781 | for (i = 0; (i < nrchips); i++) { |
| 3782 | ioaddr = panelp->iobase + (i * 4); |
| 3783 | outb(SCCR, (ioaddr + XP_ADDR)); |
| 3784 | outb(CR_RESETALL, (ioaddr + XP_DATA)); |
| 3785 | outb(TSTR, (ioaddr + XP_ADDR)); |
| 3786 | if (inb(ioaddr + XP_DATA) != 0) { |
| 3787 | printk("STALLION: sc26198 not responding, " |
| 3788 | "brd=%d panel=%d chip=%d\n", |
| 3789 | panelp->brdnr, panelp->panelnr, i); |
| 3790 | continue; |
| 3791 | } |
| 3792 | chipmask |= (0x1 << i); |
| 3793 | outb(GCCR, (ioaddr + XP_ADDR)); |
| 3794 | outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); |
| 3795 | outb(WDTRCR, (ioaddr + XP_ADDR)); |
| 3796 | outb(0xff, (ioaddr + XP_DATA)); |
| 3797 | } |
| 3798 | |
| 3799 | BRDDISABLE(panelp->brdnr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3800 | return chipmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3801 | } |
| 3802 | |
| 3803 | /*****************************************************************************/ |
| 3804 | |
| 3805 | /* |
| 3806 | * Initialize hardware specific port registers. |
| 3807 | */ |
| 3808 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3809 | static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3810 | { |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3811 | pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
| 3812 | panelp, portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3813 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3814 | if ((brdp == NULL) || (panelp == NULL) || |
| 3815 | (portp == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3816 | return; |
| 3817 | |
| 3818 | portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); |
| 3819 | portp->uartaddr = (portp->portnr & 0x07) << 4; |
| 3820 | portp->pagenr = panelp->pagenr; |
| 3821 | portp->hwid = 0x1; |
| 3822 | |
| 3823 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3824 | stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); |
| 3825 | BRDDISABLE(portp->brdnr); |
| 3826 | } |
| 3827 | |
| 3828 | /*****************************************************************************/ |
| 3829 | |
| 3830 | /* |
| 3831 | * Set up the sc26198 registers for a port based on the termios port |
| 3832 | * settings. |
| 3833 | */ |
| 3834 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 3835 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3836 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3837 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3838 | unsigned long flags; |
| 3839 | unsigned int baudrate; |
| 3840 | unsigned char mr0, mr1, mr2, clk; |
| 3841 | unsigned char imron, imroff, iopr, ipr; |
| 3842 | |
| 3843 | mr0 = 0; |
| 3844 | mr1 = 0; |
| 3845 | mr2 = 0; |
| 3846 | clk = 0; |
| 3847 | iopr = 0; |
| 3848 | imron = 0; |
| 3849 | imroff = 0; |
| 3850 | |
| 3851 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3852 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3853 | return; |
| 3854 | |
| 3855 | /* |
| 3856 | * Set up the RX char ignore mask with those RX error types we |
| 3857 | * can ignore. |
| 3858 | */ |
| 3859 | portp->rxignoremsk = 0; |
| 3860 | if (tiosp->c_iflag & IGNPAR) |
| 3861 | portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | |
| 3862 | SR_RXOVERRUN); |
| 3863 | if (tiosp->c_iflag & IGNBRK) |
| 3864 | portp->rxignoremsk |= SR_RXBREAK; |
| 3865 | |
| 3866 | portp->rxmarkmsk = SR_RXOVERRUN; |
| 3867 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
| 3868 | portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); |
| 3869 | if (tiosp->c_iflag & BRKINT) |
| 3870 | portp->rxmarkmsk |= SR_RXBREAK; |
| 3871 | |
| 3872 | /* |
| 3873 | * Go through the char size, parity and stop bits and set all the |
| 3874 | * option register appropriately. |
| 3875 | */ |
| 3876 | switch (tiosp->c_cflag & CSIZE) { |
| 3877 | case CS5: |
| 3878 | mr1 |= MR1_CS5; |
| 3879 | break; |
| 3880 | case CS6: |
| 3881 | mr1 |= MR1_CS6; |
| 3882 | break; |
| 3883 | case CS7: |
| 3884 | mr1 |= MR1_CS7; |
| 3885 | break; |
| 3886 | default: |
| 3887 | mr1 |= MR1_CS8; |
| 3888 | break; |
| 3889 | } |
| 3890 | |
| 3891 | if (tiosp->c_cflag & CSTOPB) |
| 3892 | mr2 |= MR2_STOP2; |
| 3893 | else |
| 3894 | mr2 |= MR2_STOP1; |
| 3895 | |
| 3896 | if (tiosp->c_cflag & PARENB) { |
| 3897 | if (tiosp->c_cflag & PARODD) |
| 3898 | mr1 |= (MR1_PARENB | MR1_PARODD); |
| 3899 | else |
| 3900 | mr1 |= (MR1_PARENB | MR1_PAREVEN); |
| 3901 | } else { |
| 3902 | mr1 |= MR1_PARNONE; |
| 3903 | } |
| 3904 | |
| 3905 | mr1 |= MR1_ERRBLOCK; |
| 3906 | |
| 3907 | /* |
| 3908 | * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing |
| 3909 | * space for hardware flow control and the like. This should be set to |
| 3910 | * VMIN. |
| 3911 | */ |
| 3912 | mr2 |= MR2_RXFIFOHALF; |
| 3913 | |
| 3914 | /* |
| 3915 | * Calculate the baud rate timers. For now we will just assume that |
| 3916 | * the input and output baud are the same. The sc26198 has a fixed |
| 3917 | * baud rate table, so only discrete baud rates possible. |
| 3918 | */ |
| 3919 | baudrate = tiosp->c_cflag & CBAUD; |
| 3920 | if (baudrate & CBAUDEX) { |
| 3921 | baudrate &= ~CBAUDEX; |
| 3922 | if ((baudrate < 1) || (baudrate > 4)) |
| 3923 | tiosp->c_cflag &= ~CBAUDEX; |
| 3924 | else |
| 3925 | baudrate += 15; |
| 3926 | } |
| 3927 | baudrate = stl_baudrates[baudrate]; |
| 3928 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
| 3929 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 3930 | baudrate = 57600; |
| 3931 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 3932 | baudrate = 115200; |
| 3933 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 3934 | baudrate = 230400; |
| 3935 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 3936 | baudrate = 460800; |
| 3937 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| 3938 | baudrate = (portp->baud_base / portp->custom_divisor); |
| 3939 | } |
| 3940 | if (baudrate > STL_SC26198MAXBAUD) |
| 3941 | baudrate = STL_SC26198MAXBAUD; |
| 3942 | |
| 3943 | if (baudrate > 0) { |
| 3944 | for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { |
| 3945 | if (baudrate <= sc26198_baudtable[clk]) |
| 3946 | break; |
| 3947 | } |
| 3948 | } |
| 3949 | |
| 3950 | /* |
| 3951 | * Check what form of modem signaling is required and set it up. |
| 3952 | */ |
| 3953 | if (tiosp->c_cflag & CLOCAL) { |
| 3954 | portp->flags &= ~ASYNC_CHECK_CD; |
| 3955 | } else { |
| 3956 | iopr |= IOPR_DCDCOS; |
| 3957 | imron |= IR_IOPORT; |
| 3958 | portp->flags |= ASYNC_CHECK_CD; |
| 3959 | } |
| 3960 | |
| 3961 | /* |
| 3962 | * Setup sc26198 enhanced modes if we can. In particular we want to |
| 3963 | * handle as much of the flow control as possible automatically. As |
| 3964 | * well as saving a few CPU cycles it will also greatly improve flow |
| 3965 | * control reliability. |
| 3966 | */ |
| 3967 | if (tiosp->c_iflag & IXON) { |
| 3968 | mr0 |= MR0_SWFTX | MR0_SWFT; |
| 3969 | imron |= IR_XONXOFF; |
| 3970 | } else { |
| 3971 | imroff |= IR_XONXOFF; |
| 3972 | } |
| 3973 | if (tiosp->c_iflag & IXOFF) |
| 3974 | mr0 |= MR0_SWFRX; |
| 3975 | |
| 3976 | if (tiosp->c_cflag & CRTSCTS) { |
| 3977 | mr2 |= MR2_AUTOCTS; |
| 3978 | mr1 |= MR1_AUTORTS; |
| 3979 | } |
| 3980 | |
| 3981 | /* |
| 3982 | * All sc26198 register values calculated so go through and set |
| 3983 | * them all up. |
| 3984 | */ |
| 3985 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3986 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3987 | portp->portnr, portp->panelnr, portp->brdnr); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3988 | pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); |
| 3989 | pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); |
| 3990 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3991 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| 3992 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3993 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3994 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3995 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3996 | stl_sc26198setreg(portp, IMR, 0); |
| 3997 | stl_sc26198updatereg(portp, MR0, mr0); |
| 3998 | stl_sc26198updatereg(portp, MR1, mr1); |
| 3999 | stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); |
| 4000 | stl_sc26198updatereg(portp, MR2, mr2); |
| 4001 | stl_sc26198updatereg(portp, IOPIOR, |
| 4002 | ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); |
| 4003 | |
| 4004 | if (baudrate > 0) { |
| 4005 | stl_sc26198setreg(portp, TXCSR, clk); |
| 4006 | stl_sc26198setreg(portp, RXCSR, clk); |
| 4007 | } |
| 4008 | |
| 4009 | stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); |
| 4010 | stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); |
| 4011 | |
| 4012 | ipr = stl_sc26198getreg(portp, IPR); |
| 4013 | if (ipr & IPR_DCD) |
| 4014 | portp->sigs &= ~TIOCM_CD; |
| 4015 | else |
| 4016 | portp->sigs |= TIOCM_CD; |
| 4017 | |
| 4018 | portp->imr = (portp->imr & ~imroff) | imron; |
| 4019 | stl_sc26198setreg(portp, IMR, portp->imr); |
| 4020 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4021 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4022 | } |
| 4023 | |
| 4024 | /*****************************************************************************/ |
| 4025 | |
| 4026 | /* |
| 4027 | * Set the state of the DTR and RTS signals. |
| 4028 | */ |
| 4029 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4030 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4031 | { |
| 4032 | unsigned char iopioron, iopioroff; |
| 4033 | unsigned long flags; |
| 4034 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4035 | pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp, |
| 4036 | dtr, rts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4037 | |
| 4038 | iopioron = 0; |
| 4039 | iopioroff = 0; |
| 4040 | if (dtr == 0) |
| 4041 | iopioroff |= IPR_DTR; |
| 4042 | else if (dtr > 0) |
| 4043 | iopioron |= IPR_DTR; |
| 4044 | if (rts == 0) |
| 4045 | iopioroff |= IPR_RTS; |
| 4046 | else if (rts > 0) |
| 4047 | iopioron |= IPR_RTS; |
| 4048 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4049 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4050 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4051 | stl_sc26198setreg(portp, IOPIOR, |
| 4052 | ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); |
| 4053 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4054 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4055 | } |
| 4056 | |
| 4057 | /*****************************************************************************/ |
| 4058 | |
| 4059 | /* |
| 4060 | * Return the state of the signals. |
| 4061 | */ |
| 4062 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4063 | static int stl_sc26198getsignals(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4064 | { |
| 4065 | unsigned char ipr; |
| 4066 | unsigned long flags; |
| 4067 | int sigs; |
| 4068 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4069 | pr_debug("stl_sc26198getsignals(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4070 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4071 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4072 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4073 | ipr = stl_sc26198getreg(portp, IPR); |
| 4074 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4075 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4076 | |
| 4077 | sigs = 0; |
| 4078 | sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; |
| 4079 | sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; |
| 4080 | sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; |
| 4081 | sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; |
| 4082 | sigs |= TIOCM_DSR; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4083 | return sigs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4084 | } |
| 4085 | |
| 4086 | /*****************************************************************************/ |
| 4087 | |
| 4088 | /* |
| 4089 | * Enable/Disable the Transmitter and/or Receiver. |
| 4090 | */ |
| 4091 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4092 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4093 | { |
| 4094 | unsigned char ccr; |
| 4095 | unsigned long flags; |
| 4096 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4097 | pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4098 | |
| 4099 | ccr = portp->crenable; |
| 4100 | if (tx == 0) |
| 4101 | ccr &= ~CR_TXENABLE; |
| 4102 | else if (tx > 0) |
| 4103 | ccr |= CR_TXENABLE; |
| 4104 | if (rx == 0) |
| 4105 | ccr &= ~CR_RXENABLE; |
| 4106 | else if (rx > 0) |
| 4107 | ccr |= CR_RXENABLE; |
| 4108 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4109 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4110 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4111 | stl_sc26198setreg(portp, SCCR, ccr); |
| 4112 | BRDDISABLE(portp->brdnr); |
| 4113 | portp->crenable = ccr; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4114 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4115 | } |
| 4116 | |
| 4117 | /*****************************************************************************/ |
| 4118 | |
| 4119 | /* |
| 4120 | * Start/stop the Transmitter and/or Receiver. |
| 4121 | */ |
| 4122 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4123 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4124 | { |
| 4125 | unsigned char imr; |
| 4126 | unsigned long flags; |
| 4127 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4128 | pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4129 | |
| 4130 | imr = portp->imr; |
| 4131 | if (tx == 0) |
| 4132 | imr &= ~IR_TXRDY; |
| 4133 | else if (tx == 1) |
| 4134 | imr |= IR_TXRDY; |
| 4135 | if (rx == 0) |
| 4136 | imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); |
| 4137 | else if (rx > 0) |
| 4138 | imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; |
| 4139 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4140 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4141 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4142 | stl_sc26198setreg(portp, IMR, imr); |
| 4143 | BRDDISABLE(portp->brdnr); |
| 4144 | portp->imr = imr; |
| 4145 | if (tx > 0) |
| 4146 | set_bit(ASYI_TXBUSY, &portp->istate); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4147 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4148 | } |
| 4149 | |
| 4150 | /*****************************************************************************/ |
| 4151 | |
| 4152 | /* |
| 4153 | * Disable all interrupts from this port. |
| 4154 | */ |
| 4155 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4156 | static void stl_sc26198disableintrs(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4157 | { |
| 4158 | unsigned long flags; |
| 4159 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4160 | pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4161 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4162 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4163 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4164 | portp->imr = 0; |
| 4165 | stl_sc26198setreg(portp, IMR, 0); |
| 4166 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4167 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4168 | } |
| 4169 | |
| 4170 | /*****************************************************************************/ |
| 4171 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4172 | static void stl_sc26198sendbreak(struct stlport *portp, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4173 | { |
| 4174 | unsigned long flags; |
| 4175 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4176 | pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4177 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4178 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4179 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4180 | if (len == 1) { |
| 4181 | stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); |
| 4182 | portp->stats.txbreaks++; |
| 4183 | } else { |
| 4184 | stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); |
| 4185 | } |
| 4186 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4187 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4188 | } |
| 4189 | |
| 4190 | /*****************************************************************************/ |
| 4191 | |
| 4192 | /* |
| 4193 | * Take flow control actions... |
| 4194 | */ |
| 4195 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4196 | static void stl_sc26198flowctrl(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4197 | { |
| 4198 | struct tty_struct *tty; |
| 4199 | unsigned long flags; |
| 4200 | unsigned char mr0; |
| 4201 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4202 | pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4203 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4204 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4205 | return; |
| 4206 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4207 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4208 | return; |
| 4209 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4210 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4211 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4212 | |
| 4213 | if (state) { |
| 4214 | if (tty->termios->c_iflag & IXOFF) { |
| 4215 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4216 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4217 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| 4218 | mr0 |= MR0_SWFRX; |
| 4219 | portp->stats.rxxon++; |
| 4220 | stl_sc26198wait(portp); |
| 4221 | stl_sc26198setreg(portp, MR0, mr0); |
| 4222 | } |
| 4223 | /* |
| 4224 | * Question: should we return RTS to what it was before? It may |
| 4225 | * have been set by an ioctl... Suppose not, since if you have |
| 4226 | * hardware flow control set then it is pretty silly to go and |
| 4227 | * set the RTS line by hand. |
| 4228 | */ |
| 4229 | if (tty->termios->c_cflag & CRTSCTS) { |
| 4230 | stl_sc26198setreg(portp, MR1, |
| 4231 | (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); |
| 4232 | stl_sc26198setreg(portp, IOPIOR, |
| 4233 | (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); |
| 4234 | portp->stats.rxrtson++; |
| 4235 | } |
| 4236 | } else { |
| 4237 | if (tty->termios->c_iflag & IXOFF) { |
| 4238 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4239 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4240 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| 4241 | mr0 &= ~MR0_SWFRX; |
| 4242 | portp->stats.rxxoff++; |
| 4243 | stl_sc26198wait(portp); |
| 4244 | stl_sc26198setreg(portp, MR0, mr0); |
| 4245 | } |
| 4246 | if (tty->termios->c_cflag & CRTSCTS) { |
| 4247 | stl_sc26198setreg(portp, MR1, |
| 4248 | (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); |
| 4249 | stl_sc26198setreg(portp, IOPIOR, |
| 4250 | (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); |
| 4251 | portp->stats.rxrtsoff++; |
| 4252 | } |
| 4253 | } |
| 4254 | |
| 4255 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4256 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4257 | } |
| 4258 | |
| 4259 | /*****************************************************************************/ |
| 4260 | |
| 4261 | /* |
| 4262 | * Send a flow control character. |
| 4263 | */ |
| 4264 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4265 | static void stl_sc26198sendflow(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4266 | { |
| 4267 | struct tty_struct *tty; |
| 4268 | unsigned long flags; |
| 4269 | unsigned char mr0; |
| 4270 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4271 | pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4272 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4273 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4274 | return; |
| 4275 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4276 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4277 | return; |
| 4278 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4279 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4280 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4281 | if (state) { |
| 4282 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4283 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4284 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| 4285 | mr0 |= MR0_SWFRX; |
| 4286 | portp->stats.rxxon++; |
| 4287 | stl_sc26198wait(portp); |
| 4288 | stl_sc26198setreg(portp, MR0, mr0); |
| 4289 | } else { |
| 4290 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4291 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4292 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| 4293 | mr0 &= ~MR0_SWFRX; |
| 4294 | portp->stats.rxxoff++; |
| 4295 | stl_sc26198wait(portp); |
| 4296 | stl_sc26198setreg(portp, MR0, mr0); |
| 4297 | } |
| 4298 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4299 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4300 | } |
| 4301 | |
| 4302 | /*****************************************************************************/ |
| 4303 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4304 | static void stl_sc26198flush(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4305 | { |
| 4306 | unsigned long flags; |
| 4307 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4308 | pr_debug("stl_sc26198flush(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4309 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4310 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4311 | return; |
| 4312 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4313 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4314 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4315 | stl_sc26198setreg(portp, SCCR, CR_TXRESET); |
| 4316 | stl_sc26198setreg(portp, SCCR, portp->crenable); |
| 4317 | BRDDISABLE(portp->brdnr); |
| 4318 | portp->tx.tail = portp->tx.head; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4319 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4320 | } |
| 4321 | |
| 4322 | /*****************************************************************************/ |
| 4323 | |
| 4324 | /* |
| 4325 | * Return the current state of data flow on this port. This is only |
| 4326 | * really interresting when determining if data has fully completed |
| 4327 | * transmission or not... The sc26198 interrupt scheme cannot |
| 4328 | * determine when all data has actually drained, so we need to |
| 4329 | * check the port statusy register to be sure. |
| 4330 | */ |
| 4331 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4332 | static int stl_sc26198datastate(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4333 | { |
| 4334 | unsigned long flags; |
| 4335 | unsigned char sr; |
| 4336 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4337 | pr_debug("stl_sc26198datastate(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4338 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4339 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4340 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4341 | if (test_bit(ASYI_TXBUSY, &portp->istate)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4342 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4343 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4344 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4345 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4346 | sr = stl_sc26198getreg(portp, SR); |
| 4347 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4348 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4349 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4350 | return (sr & SR_TXEMPTY) ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4351 | } |
| 4352 | |
| 4353 | /*****************************************************************************/ |
| 4354 | |
| 4355 | /* |
| 4356 | * Delay for a small amount of time, to give the sc26198 a chance |
| 4357 | * to process a command... |
| 4358 | */ |
| 4359 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4360 | static void stl_sc26198wait(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4361 | { |
| 4362 | int i; |
| 4363 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4364 | pr_debug("stl_sc26198wait(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4365 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4366 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4367 | return; |
| 4368 | |
| 4369 | for (i = 0; (i < 20); i++) |
| 4370 | stl_sc26198getglobreg(portp, TSTR); |
| 4371 | } |
| 4372 | |
| 4373 | /*****************************************************************************/ |
| 4374 | |
| 4375 | /* |
| 4376 | * If we are TX flow controlled and in IXANY mode then we may |
| 4377 | * need to unflow control here. We gotta do this because of the |
| 4378 | * automatic flow control modes of the sc26198. |
| 4379 | */ |
| 4380 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4381 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4382 | { |
| 4383 | unsigned char mr0; |
| 4384 | |
| 4385 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4386 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4387 | stl_sc26198setreg(portp, SCCR, CR_HOSTXON); |
| 4388 | stl_sc26198wait(portp); |
| 4389 | stl_sc26198setreg(portp, MR0, mr0); |
| 4390 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
| 4391 | } |
| 4392 | |
| 4393 | /*****************************************************************************/ |
| 4394 | |
| 4395 | /* |
| 4396 | * Interrupt service routine for sc26198 panels. |
| 4397 | */ |
| 4398 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4399 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4400 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4401 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4402 | unsigned int iack; |
| 4403 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4404 | spin_lock(&brd_lock); |
| 4405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4406 | /* |
| 4407 | * Work around bug in sc26198 chip... Cannot have A6 address |
| 4408 | * line of UART high, else iack will be returned as 0. |
| 4409 | */ |
| 4410 | outb(0, (iobase + 1)); |
| 4411 | |
| 4412 | iack = inb(iobase + XP_IACK); |
| 4413 | portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; |
| 4414 | |
| 4415 | if (iack & IVR_RXDATA) |
| 4416 | stl_sc26198rxisr(portp, iack); |
| 4417 | else if (iack & IVR_TXDATA) |
| 4418 | stl_sc26198txisr(portp); |
| 4419 | else |
| 4420 | stl_sc26198otherisr(portp, iack); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4421 | |
| 4422 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4423 | } |
| 4424 | |
| 4425 | /*****************************************************************************/ |
| 4426 | |
| 4427 | /* |
| 4428 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
| 4429 | * chars is pretty simple, stuff as many as possible from the TX buffer |
| 4430 | * into the sc26198 FIFO. |
| 4431 | * In practice it is possible that interrupts are enabled but that the |
| 4432 | * port has been hung up. Need to handle not having any TX buffer here, |
| 4433 | * this is done by using the side effect that head and tail will also |
| 4434 | * be NULL if the buffer has been freed. |
| 4435 | */ |
| 4436 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4437 | static void stl_sc26198txisr(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4438 | { |
| 4439 | unsigned int ioaddr; |
| 4440 | unsigned char mr0; |
| 4441 | int len, stlen; |
| 4442 | char *head, *tail; |
| 4443 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4444 | pr_debug("stl_sc26198txisr(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4445 | |
| 4446 | ioaddr = portp->ioaddr; |
| 4447 | head = portp->tx.head; |
| 4448 | tail = portp->tx.tail; |
| 4449 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 4450 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
| 4451 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| 4452 | set_bit(ASYI_TXLOW, &portp->istate); |
| 4453 | schedule_work(&portp->tqueue); |
| 4454 | } |
| 4455 | |
| 4456 | if (len == 0) { |
| 4457 | outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); |
| 4458 | mr0 = inb(ioaddr + XP_DATA); |
| 4459 | if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { |
| 4460 | portp->imr &= ~IR_TXRDY; |
| 4461 | outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); |
| 4462 | outb(portp->imr, (ioaddr + XP_DATA)); |
| 4463 | clear_bit(ASYI_TXBUSY, &portp->istate); |
| 4464 | } else { |
| 4465 | mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); |
| 4466 | outb(mr0, (ioaddr + XP_DATA)); |
| 4467 | } |
| 4468 | } else { |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 4469 | len = min(len, SC26198_TXFIFOSIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4470 | portp->stats.txtotal += len; |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 4471 | stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4472 | outb(GTXFIFO, (ioaddr + XP_ADDR)); |
| 4473 | outsb((ioaddr + XP_DATA), tail, stlen); |
| 4474 | len -= stlen; |
| 4475 | tail += stlen; |
| 4476 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 4477 | tail = portp->tx.buf; |
| 4478 | if (len > 0) { |
| 4479 | outsb((ioaddr + XP_DATA), tail, len); |
| 4480 | tail += len; |
| 4481 | } |
| 4482 | portp->tx.tail = tail; |
| 4483 | } |
| 4484 | } |
| 4485 | |
| 4486 | /*****************************************************************************/ |
| 4487 | |
| 4488 | /* |
| 4489 | * Receive character interrupt handler. Determine if we have good chars |
| 4490 | * or bad chars and then process appropriately. Good chars are easy |
| 4491 | * just shove the lot into the RX buffer and set all status byte to 0. |
| 4492 | * If a bad RX char then process as required. This routine needs to be |
| 4493 | * fast! In practice it is possible that we get an interrupt on a port |
| 4494 | * that is closed. This can happen on hangups - since they completely |
| 4495 | * shutdown a port not in user context. Need to handle this case. |
| 4496 | */ |
| 4497 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4498 | static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4499 | { |
| 4500 | struct tty_struct *tty; |
| 4501 | unsigned int len, buflen, ioaddr; |
| 4502 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4503 | pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4504 | |
| 4505 | tty = portp->tty; |
| 4506 | ioaddr = portp->ioaddr; |
| 4507 | outb(GIBCR, (ioaddr + XP_ADDR)); |
| 4508 | len = inb(ioaddr + XP_DATA) + 1; |
| 4509 | |
| 4510 | if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4511 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 4512 | len = min(len, sizeof(stl_unwanted)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4513 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
| 4514 | insb((ioaddr + XP_DATA), &stl_unwanted[0], len); |
| 4515 | portp->stats.rxlost += len; |
| 4516 | portp->stats.rxtotal += len; |
| 4517 | } else { |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 4518 | len = min(len, buflen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4519 | if (len > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4520 | unsigned char *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4521 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4522 | tty_prepare_flip_string(tty, &ptr, len); |
| 4523 | insb((ioaddr + XP_DATA), ptr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4524 | tty_schedule_flip(tty); |
| 4525 | portp->stats.rxtotal += len; |
| 4526 | } |
| 4527 | } |
| 4528 | } else { |
| 4529 | stl_sc26198rxbadchars(portp); |
| 4530 | } |
| 4531 | |
| 4532 | /* |
| 4533 | * If we are TX flow controlled and in IXANY mode then we may need |
| 4534 | * to unflow control here. We gotta do this because of the automatic |
| 4535 | * flow control modes of the sc26198. |
| 4536 | */ |
| 4537 | if (test_bit(ASYI_TXFLOWED, &portp->istate)) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4538 | if ((tty != NULL) && |
| 4539 | (tty->termios != NULL) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4540 | (tty->termios->c_iflag & IXANY)) { |
| 4541 | stl_sc26198txunflow(portp, tty); |
| 4542 | } |
| 4543 | } |
| 4544 | } |
| 4545 | |
| 4546 | /*****************************************************************************/ |
| 4547 | |
| 4548 | /* |
| 4549 | * Process an RX bad character. |
| 4550 | */ |
| 4551 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4552 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4553 | { |
| 4554 | struct tty_struct *tty; |
| 4555 | unsigned int ioaddr; |
| 4556 | |
| 4557 | tty = portp->tty; |
| 4558 | ioaddr = portp->ioaddr; |
| 4559 | |
| 4560 | if (status & SR_RXPARITY) |
| 4561 | portp->stats.rxparity++; |
| 4562 | if (status & SR_RXFRAMING) |
| 4563 | portp->stats.rxframing++; |
| 4564 | if (status & SR_RXOVERRUN) |
| 4565 | portp->stats.rxoverrun++; |
| 4566 | if (status & SR_RXBREAK) |
| 4567 | portp->stats.rxbreaks++; |
| 4568 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4569 | if ((tty != NULL) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4570 | ((portp->rxignoremsk & status) == 0)) { |
| 4571 | if (portp->rxmarkmsk & status) { |
| 4572 | if (status & SR_RXBREAK) { |
| 4573 | status = TTY_BREAK; |
| 4574 | if (portp->flags & ASYNC_SAK) { |
| 4575 | do_SAK(tty); |
| 4576 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4577 | } |
| 4578 | } else if (status & SR_RXPARITY) { |
| 4579 | status = TTY_PARITY; |
| 4580 | } else if (status & SR_RXFRAMING) { |
| 4581 | status = TTY_FRAME; |
| 4582 | } else if(status & SR_RXOVERRUN) { |
| 4583 | status = TTY_OVERRUN; |
| 4584 | } else { |
| 4585 | status = 0; |
| 4586 | } |
| 4587 | } else { |
| 4588 | status = 0; |
| 4589 | } |
| 4590 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4591 | tty_insert_flip_char(tty, ch, status); |
| 4592 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4593 | |
| 4594 | if (status == 0) |
| 4595 | portp->stats.rxtotal++; |
| 4596 | } |
| 4597 | } |
| 4598 | |
| 4599 | /*****************************************************************************/ |
| 4600 | |
| 4601 | /* |
| 4602 | * Process all characters in the RX FIFO of the UART. Check all char |
| 4603 | * status bytes as well, and process as required. We need to check |
| 4604 | * all bytes in the FIFO, in case some more enter the FIFO while we |
| 4605 | * are here. To get the exact character error type we need to switch |
| 4606 | * into CHAR error mode (that is why we need to make sure we empty |
| 4607 | * the FIFO). |
| 4608 | */ |
| 4609 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4610 | static void stl_sc26198rxbadchars(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4611 | { |
| 4612 | unsigned char status, mr1; |
| 4613 | char ch; |
| 4614 | |
| 4615 | /* |
| 4616 | * To get the precise error type for each character we must switch |
| 4617 | * back into CHAR error mode. |
| 4618 | */ |
| 4619 | mr1 = stl_sc26198getreg(portp, MR1); |
| 4620 | stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); |
| 4621 | |
| 4622 | while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { |
| 4623 | stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); |
| 4624 | ch = stl_sc26198getreg(portp, RXFIFO); |
| 4625 | stl_sc26198rxbadch(portp, status, ch); |
| 4626 | } |
| 4627 | |
| 4628 | /* |
| 4629 | * To get correct interrupt class we must switch back into BLOCK |
| 4630 | * error mode. |
| 4631 | */ |
| 4632 | stl_sc26198setreg(portp, MR1, mr1); |
| 4633 | } |
| 4634 | |
| 4635 | /*****************************************************************************/ |
| 4636 | |
| 4637 | /* |
| 4638 | * Other interrupt handler. This includes modem signals, flow |
| 4639 | * control actions, etc. Most stuff is left to off-level interrupt |
| 4640 | * processing time. |
| 4641 | */ |
| 4642 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4643 | static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4644 | { |
| 4645 | unsigned char cir, ipr, xisr; |
| 4646 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4647 | pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4648 | |
| 4649 | cir = stl_sc26198getglobreg(portp, CIR); |
| 4650 | |
| 4651 | switch (cir & CIR_SUBTYPEMASK) { |
| 4652 | case CIR_SUBCOS: |
| 4653 | ipr = stl_sc26198getreg(portp, IPR); |
| 4654 | if (ipr & IPR_DCDCHANGE) { |
| 4655 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
| 4656 | schedule_work(&portp->tqueue); |
| 4657 | portp->stats.modem++; |
| 4658 | } |
| 4659 | break; |
| 4660 | case CIR_SUBXONXOFF: |
| 4661 | xisr = stl_sc26198getreg(portp, XISR); |
| 4662 | if (xisr & XISR_RXXONGOT) { |
| 4663 | set_bit(ASYI_TXFLOWED, &portp->istate); |
| 4664 | portp->stats.txxoff++; |
| 4665 | } |
| 4666 | if (xisr & XISR_RXXOFFGOT) { |
| 4667 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
| 4668 | portp->stats.txxon++; |
| 4669 | } |
| 4670 | break; |
| 4671 | case CIR_SUBBREAK: |
| 4672 | stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); |
| 4673 | stl_sc26198rxbadchars(portp); |
| 4674 | break; |
| 4675 | default: |
| 4676 | break; |
| 4677 | } |
| 4678 | } |
| 4679 | |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4680 | /* |
| 4681 | * Loadable module initialization stuff. |
| 4682 | */ |
| 4683 | static int __init stallion_module_init(void) |
| 4684 | { |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 4685 | struct stlbrd *brdp; |
| 4686 | struct stlconf conf; |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 4687 | unsigned int i, retval; |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4688 | |
| 4689 | printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); |
| 4690 | |
| 4691 | spin_lock_init(&stallion_lock); |
| 4692 | spin_lock_init(&brd_lock); |
| 4693 | |
Jiri Slaby | 843b568 | 2006-12-08 02:39:12 -0800 | [diff] [blame^] | 4694 | /* |
| 4695 | * Find any dynamically supported boards. That is via module load |
| 4696 | * line options. |
| 4697 | */ |
| 4698 | for (i = stl_nrbrds; i < stl_nargs; i++) { |
| 4699 | memset(&conf, 0, sizeof(conf)); |
| 4700 | if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) |
| 4701 | continue; |
| 4702 | if ((brdp = stl_allocbrd()) == NULL) |
| 4703 | continue; |
| 4704 | brdp->brdnr = i; |
| 4705 | brdp->brdtype = conf.brdtype; |
| 4706 | brdp->ioaddr1 = conf.ioaddr1; |
| 4707 | brdp->ioaddr2 = conf.ioaddr2; |
| 4708 | brdp->irq = conf.irq; |
| 4709 | brdp->irqtype = conf.irqtype; |
| 4710 | if (stl_brdinit(brdp)) |
| 4711 | kfree(brdp); |
| 4712 | else |
| 4713 | stl_nrbrds = i + 1; |
| 4714 | } |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4715 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 4716 | retval = pci_register_driver(&stl_pcidriver); |
| 4717 | if (retval) |
| 4718 | goto err; |
| 4719 | |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4720 | stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); |
| 4721 | if (!stl_serial) |
| 4722 | return -1; |
| 4723 | |
| 4724 | /* |
| 4725 | * Set up a character driver for per board stuff. This is mainly used |
| 4726 | * to do stats ioctls on the ports. |
| 4727 | */ |
| 4728 | if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) |
| 4729 | printk("STALLION: failed to register serial board device\n"); |
| 4730 | |
| 4731 | stallion_class = class_create(THIS_MODULE, "staliomem"); |
| 4732 | for (i = 0; i < 4; i++) |
| 4733 | class_device_create(stallion_class, NULL, |
| 4734 | MKDEV(STL_SIOMEMMAJOR, i), NULL, |
| 4735 | "staliomem%d", i); |
| 4736 | |
| 4737 | stl_serial->owner = THIS_MODULE; |
| 4738 | stl_serial->driver_name = stl_drvname; |
| 4739 | stl_serial->name = "ttyE"; |
| 4740 | stl_serial->major = STL_SERIALMAJOR; |
| 4741 | stl_serial->minor_start = 0; |
| 4742 | stl_serial->type = TTY_DRIVER_TYPE_SERIAL; |
| 4743 | stl_serial->subtype = SERIAL_TYPE_NORMAL; |
| 4744 | stl_serial->init_termios = stl_deftermios; |
| 4745 | stl_serial->flags = TTY_DRIVER_REAL_RAW; |
| 4746 | tty_set_operations(stl_serial, &stl_ops); |
| 4747 | |
| 4748 | if (tty_register_driver(stl_serial)) { |
| 4749 | put_tty_driver(stl_serial); |
| 4750 | printk("STALLION: failed to register serial driver\n"); |
| 4751 | return -1; |
| 4752 | } |
| 4753 | |
| 4754 | return 0; |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 4755 | err: |
| 4756 | return retval; |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4757 | } |
| 4758 | |
| 4759 | static void __exit stallion_module_exit(void) |
| 4760 | { |
| 4761 | struct stlbrd *brdp; |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 4762 | int i; |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4763 | |
| 4764 | pr_debug("cleanup_module()\n"); |
| 4765 | |
| 4766 | printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, |
| 4767 | stl_drvversion); |
| 4768 | |
| 4769 | /* |
| 4770 | * Free up all allocated resources used by the ports. This includes |
| 4771 | * memory and interrupts. As part of this process we will also do |
| 4772 | * a hangup on every open port - to try to flush out any processes |
| 4773 | * hanging onto ports. |
| 4774 | */ |
| 4775 | i = tty_unregister_driver(stl_serial); |
| 4776 | put_tty_driver(stl_serial); |
| 4777 | if (i) { |
| 4778 | printk("STALLION: failed to un-register tty driver, " |
| 4779 | "errno=%d\n", -i); |
| 4780 | return; |
| 4781 | } |
| 4782 | for (i = 0; i < 4; i++) |
| 4783 | class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); |
| 4784 | if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) |
| 4785 | printk("STALLION: failed to un-register serial memory device, " |
| 4786 | "errno=%d\n", -i); |
| 4787 | class_destroy(stallion_class); |
| 4788 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 4789 | pci_unregister_driver(&stl_pcidriver); |
| 4790 | |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4791 | for (i = 0; (i < stl_nrbrds); i++) { |
| 4792 | if ((brdp = stl_brds[i]) == NULL) |
| 4793 | continue; |
| 4794 | |
| 4795 | free_irq(brdp->irq, brdp); |
| 4796 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame] | 4797 | stl_cleanup_panels(brdp); |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4798 | |
| 4799 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 4800 | if (brdp->iosize2 > 0) |
| 4801 | release_region(brdp->ioaddr2, brdp->iosize2); |
| 4802 | |
| 4803 | kfree(brdp); |
| 4804 | stl_brds[i] = NULL; |
| 4805 | } |
| 4806 | } |
| 4807 | |
| 4808 | module_init(stallion_module_init); |
| 4809 | module_exit(stallion_module_exit); |
| 4810 | |
| 4811 | MODULE_AUTHOR("Greg Ungerer"); |
| 4812 | MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); |
| 4813 | MODULE_LICENSE("GPL"); |