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> |
| 44 | |
| 45 | #include <asm/io.h> |
| 46 | #include <asm/uaccess.h> |
| 47 | |
| 48 | #ifdef CONFIG_PCI |
| 49 | #include <linux/pci.h> |
| 50 | #endif |
| 51 | |
| 52 | /*****************************************************************************/ |
| 53 | |
| 54 | /* |
| 55 | * Define different board types. Use the standard Stallion "assigned" |
| 56 | * board numbers. Boards supported in this driver are abbreviated as |
| 57 | * EIO = EasyIO and ECH = EasyConnection 8/32. |
| 58 | */ |
| 59 | #define BRD_EASYIO 20 |
| 60 | #define BRD_ECH 21 |
| 61 | #define BRD_ECHMC 22 |
| 62 | #define BRD_ECHPCI 26 |
| 63 | #define BRD_ECH64PCI 27 |
| 64 | #define BRD_EASYIOPCI 28 |
| 65 | |
| 66 | /* |
| 67 | * Define a configuration structure to hold the board configuration. |
| 68 | * Need to set this up in the code (for now) with the boards that are |
| 69 | * to be configured into the system. This is what needs to be modified |
| 70 | * when adding/removing/modifying boards. Each line entry in the |
| 71 | * stl_brdconf[] array is a board. Each line contains io/irq/memory |
| 72 | * ranges for that board (as well as what type of board it is). |
| 73 | * Some examples: |
| 74 | * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }, |
| 75 | * This line would configure an EasyIO board (4 or 8, no difference), |
| 76 | * at io address 2a0 and irq 10. |
| 77 | * Another example: |
| 78 | * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, |
| 79 | * This line will configure an EasyConnection 8/32 board at primary io |
| 80 | * address 2a8, secondary io address 280 and irq 12. |
| 81 | * Enter as many lines into this array as you want (only the first 4 |
| 82 | * will actually be used!). Any combination of EasyIO and EasyConnection |
| 83 | * boards can be specified. EasyConnection 8/32 boards can share their |
| 84 | * secondary io addresses between each other. |
| 85 | * |
| 86 | * NOTE: there is no need to put any entries in this table for PCI |
| 87 | * boards. They will be found automatically by the driver - provided |
| 88 | * PCI BIOS32 support is compiled into the kernel. |
| 89 | */ |
| 90 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 91 | static struct stlconf { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | int brdtype; |
| 93 | int ioaddr1; |
| 94 | int ioaddr2; |
| 95 | unsigned long memaddr; |
| 96 | int irq; |
| 97 | int irqtype; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 98 | } stl_brdconf[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/ |
| 100 | }; |
| 101 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 102 | static int stl_nrbrds = ARRAY_SIZE(stl_brdconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | /*****************************************************************************/ |
| 105 | |
| 106 | /* |
| 107 | * Define some important driver characteristics. Device major numbers |
| 108 | * allocated as per Linux Device Registry. |
| 109 | */ |
| 110 | #ifndef STL_SIOMEMMAJOR |
| 111 | #define STL_SIOMEMMAJOR 28 |
| 112 | #endif |
| 113 | #ifndef STL_SERIALMAJOR |
| 114 | #define STL_SERIALMAJOR 24 |
| 115 | #endif |
| 116 | #ifndef STL_CALLOUTMAJOR |
| 117 | #define STL_CALLOUTMAJOR 25 |
| 118 | #endif |
| 119 | |
| 120 | /* |
| 121 | * Set the TX buffer size. Bigger is better, but we don't want |
| 122 | * to chew too much memory with buffers! |
| 123 | */ |
| 124 | #define STL_TXBUFLOW 512 |
| 125 | #define STL_TXBUFSIZE 4096 |
| 126 | |
| 127 | /*****************************************************************************/ |
| 128 | |
| 129 | /* |
| 130 | * Define our local driver identity first. Set up stuff to deal with |
| 131 | * all the local structures required by a serial tty driver. |
| 132 | */ |
| 133 | static char *stl_drvtitle = "Stallion Multiport Serial Driver"; |
| 134 | static char *stl_drvname = "stallion"; |
| 135 | static char *stl_drvversion = "5.6.0"; |
| 136 | |
| 137 | static struct tty_driver *stl_serial; |
| 138 | |
| 139 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | * Define a local default termios struct. All ports will be created |
| 141 | * with this termios initially. Basically all it defines is a raw port |
| 142 | * at 9600, 8 data bits, 1 stop bit. |
| 143 | */ |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 144 | static struct ktermios stl_deftermios = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), |
| 146 | .c_cc = INIT_C_CC, |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 147 | .c_ispeed = 9600, |
| 148 | .c_ospeed = 9600, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | }; |
| 150 | |
| 151 | /* |
| 152 | * Define global stats structures. Not used often, and can be |
| 153 | * re-used for each stats call. |
| 154 | */ |
| 155 | static comstats_t stl_comstats; |
| 156 | static combrd_t stl_brdstats; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 157 | static struct stlbrd stl_dummybrd; |
| 158 | static struct stlport stl_dummyport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | /* |
| 161 | * Define global place to put buffer overflow characters. |
| 162 | */ |
| 163 | static char stl_unwanted[SC26198_RXFIFOSIZE]; |
| 164 | |
| 165 | /*****************************************************************************/ |
| 166 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 167 | static struct stlbrd *stl_brds[STL_MAXBRDS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
| 169 | /* |
| 170 | * Per board state flags. Used with the state field of the board struct. |
| 171 | * Not really much here! |
| 172 | */ |
| 173 | #define BRD_FOUND 0x1 |
| 174 | |
| 175 | /* |
| 176 | * Define the port structure istate flags. These set of flags are |
| 177 | * modified at interrupt time - so setting and reseting them needs |
| 178 | * to be atomic. Use the bit clear/setting routines for this. |
| 179 | */ |
| 180 | #define ASYI_TXBUSY 1 |
| 181 | #define ASYI_TXLOW 2 |
| 182 | #define ASYI_DCDCHANGE 3 |
| 183 | #define ASYI_TXFLOWED 4 |
| 184 | |
| 185 | /* |
| 186 | * Define an array of board names as printable strings. Handy for |
| 187 | * referencing boards when printing trace and stuff. |
| 188 | */ |
| 189 | static char *stl_brdnames[] = { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 190 | NULL, |
| 191 | NULL, |
| 192 | NULL, |
| 193 | NULL, |
| 194 | NULL, |
| 195 | NULL, |
| 196 | NULL, |
| 197 | NULL, |
| 198 | NULL, |
| 199 | NULL, |
| 200 | NULL, |
| 201 | NULL, |
| 202 | NULL, |
| 203 | NULL, |
| 204 | NULL, |
| 205 | NULL, |
| 206 | NULL, |
| 207 | NULL, |
| 208 | NULL, |
| 209 | NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | "EasyIO", |
| 211 | "EC8/32-AT", |
| 212 | "EC8/32-MC", |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 213 | NULL, |
| 214 | NULL, |
| 215 | NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | "EC8/32-PCI", |
| 217 | "EC8/64-PCI", |
| 218 | "EasyIO-PCI", |
| 219 | }; |
| 220 | |
| 221 | /*****************************************************************************/ |
| 222 | |
| 223 | /* |
| 224 | * Define some string labels for arguments passed from the module |
| 225 | * load line. These allow for easy board definitions, and easy |
| 226 | * modification of the io, memory and irq resoucres. |
| 227 | */ |
| 228 | static int stl_nargs = 0; |
| 229 | static char *board0[4]; |
| 230 | static char *board1[4]; |
| 231 | static char *board2[4]; |
| 232 | static char *board3[4]; |
| 233 | |
| 234 | static char **stl_brdsp[] = { |
| 235 | (char **) &board0, |
| 236 | (char **) &board1, |
| 237 | (char **) &board2, |
| 238 | (char **) &board3 |
| 239 | }; |
| 240 | |
| 241 | /* |
| 242 | * Define a set of common board names, and types. This is used to |
| 243 | * parse any module arguments. |
| 244 | */ |
| 245 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 246 | static struct { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | char *name; |
| 248 | int type; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 249 | } stl_brdstr[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { "easyio", BRD_EASYIO }, |
| 251 | { "eio", BRD_EASYIO }, |
| 252 | { "20", BRD_EASYIO }, |
| 253 | { "ec8/32", BRD_ECH }, |
| 254 | { "ec8/32-at", BRD_ECH }, |
| 255 | { "ec8/32-isa", BRD_ECH }, |
| 256 | { "ech", BRD_ECH }, |
| 257 | { "echat", BRD_ECH }, |
| 258 | { "21", BRD_ECH }, |
| 259 | { "ec8/32-mc", BRD_ECHMC }, |
| 260 | { "ec8/32-mca", BRD_ECHMC }, |
| 261 | { "echmc", BRD_ECHMC }, |
| 262 | { "echmca", BRD_ECHMC }, |
| 263 | { "22", BRD_ECHMC }, |
| 264 | { "ec8/32-pc", BRD_ECHPCI }, |
| 265 | { "ec8/32-pci", BRD_ECHPCI }, |
| 266 | { "26", BRD_ECHPCI }, |
| 267 | { "ec8/64-pc", BRD_ECH64PCI }, |
| 268 | { "ec8/64-pci", BRD_ECH64PCI }, |
| 269 | { "ech-pci", BRD_ECH64PCI }, |
| 270 | { "echpci", BRD_ECH64PCI }, |
| 271 | { "echpc", BRD_ECH64PCI }, |
| 272 | { "27", BRD_ECH64PCI }, |
| 273 | { "easyio-pc", BRD_EASYIOPCI }, |
| 274 | { "easyio-pci", BRD_EASYIOPCI }, |
| 275 | { "eio-pci", BRD_EASYIOPCI }, |
| 276 | { "eiopci", BRD_EASYIOPCI }, |
| 277 | { "28", BRD_EASYIOPCI }, |
| 278 | }; |
| 279 | |
| 280 | /* |
| 281 | * Define the module agruments. |
| 282 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
| 284 | module_param_array(board0, charp, &stl_nargs, 0); |
| 285 | MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 286 | module_param_array(board1, charp, &stl_nargs, 0); |
| 287 | MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 288 | module_param_array(board2, charp, &stl_nargs, 0); |
| 289 | MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 290 | module_param_array(board3, charp, &stl_nargs, 0); |
| 291 | MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 292 | |
| 293 | /*****************************************************************************/ |
| 294 | |
| 295 | /* |
| 296 | * Hardware ID bits for the EasyIO and ECH boards. These defines apply |
| 297 | * to the directly accessible io ports of these boards (not the uarts - |
| 298 | * they are in cd1400.h and sc26198.h). |
| 299 | */ |
| 300 | #define EIO_8PORTRS 0x04 |
| 301 | #define EIO_4PORTRS 0x05 |
| 302 | #define EIO_8PORTDI 0x00 |
| 303 | #define EIO_8PORTM 0x06 |
| 304 | #define EIO_MK3 0x03 |
| 305 | #define EIO_IDBITMASK 0x07 |
| 306 | |
| 307 | #define EIO_BRDMASK 0xf0 |
| 308 | #define ID_BRD4 0x10 |
| 309 | #define ID_BRD8 0x20 |
| 310 | #define ID_BRD16 0x30 |
| 311 | |
| 312 | #define EIO_INTRPEND 0x08 |
| 313 | #define EIO_INTEDGE 0x00 |
| 314 | #define EIO_INTLEVEL 0x08 |
| 315 | #define EIO_0WS 0x10 |
| 316 | |
| 317 | #define ECH_ID 0xa0 |
| 318 | #define ECH_IDBITMASK 0xe0 |
| 319 | #define ECH_BRDENABLE 0x08 |
| 320 | #define ECH_BRDDISABLE 0x00 |
| 321 | #define ECH_INTENABLE 0x01 |
| 322 | #define ECH_INTDISABLE 0x00 |
| 323 | #define ECH_INTLEVEL 0x02 |
| 324 | #define ECH_INTEDGE 0x00 |
| 325 | #define ECH_INTRPEND 0x01 |
| 326 | #define ECH_BRDRESET 0x01 |
| 327 | |
| 328 | #define ECHMC_INTENABLE 0x01 |
| 329 | #define ECHMC_BRDRESET 0x02 |
| 330 | |
| 331 | #define ECH_PNLSTATUS 2 |
| 332 | #define ECH_PNL16PORT 0x20 |
| 333 | #define ECH_PNLIDMASK 0x07 |
| 334 | #define ECH_PNLXPID 0x40 |
| 335 | #define ECH_PNLINTRPEND 0x80 |
| 336 | |
| 337 | #define ECH_ADDR2MASK 0x1e0 |
| 338 | |
| 339 | /* |
| 340 | * Define the vector mapping bits for the programmable interrupt board |
| 341 | * hardware. These bits encode the interrupt for the board to use - it |
| 342 | * is software selectable (except the EIO-8M). |
| 343 | */ |
| 344 | static unsigned char stl_vecmap[] = { |
| 345 | 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, |
| 346 | 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 |
| 347 | }; |
| 348 | |
| 349 | /* |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 350 | * Lock ordering is that you may not take stallion_lock holding |
| 351 | * brd_lock. |
| 352 | */ |
| 353 | |
| 354 | static spinlock_t brd_lock; /* Guard the board mapping */ |
| 355 | static spinlock_t stallion_lock; /* Guard the tty driver */ |
| 356 | |
| 357 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | * Set up enable and disable macros for the ECH boards. They require |
| 359 | * the secondary io address space to be activated and deactivated. |
| 360 | * This way all ECH boards can share their secondary io region. |
| 361 | * If this is an ECH-PCI board then also need to set the page pointer |
| 362 | * to point to the correct page. |
| 363 | */ |
| 364 | #define BRDENABLE(brdnr,pagenr) \ |
| 365 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ |
| 366 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ |
| 367 | stl_brds[(brdnr)]->ioctrl); \ |
| 368 | else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ |
| 369 | outb((pagenr), stl_brds[(brdnr)]->ioctrl); |
| 370 | |
| 371 | #define BRDDISABLE(brdnr) \ |
| 372 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ |
| 373 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ |
| 374 | stl_brds[(brdnr)]->ioctrl); |
| 375 | |
| 376 | #define STL_CD1400MAXBAUD 230400 |
| 377 | #define STL_SC26198MAXBAUD 460800 |
| 378 | |
| 379 | #define STL_BAUDBASE 115200 |
| 380 | #define STL_CLOSEDELAY (5 * HZ / 10) |
| 381 | |
| 382 | /*****************************************************************************/ |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | /* |
| 385 | * Define the Stallion PCI vendor and device IDs. |
| 386 | */ |
| 387 | #ifndef PCI_VENDOR_ID_STALLION |
| 388 | #define PCI_VENDOR_ID_STALLION 0x124d |
| 389 | #endif |
| 390 | #ifndef PCI_DEVICE_ID_ECHPCI832 |
| 391 | #define PCI_DEVICE_ID_ECHPCI832 0x0000 |
| 392 | #endif |
| 393 | #ifndef PCI_DEVICE_ID_ECHPCI864 |
| 394 | #define PCI_DEVICE_ID_ECHPCI864 0x0002 |
| 395 | #endif |
| 396 | #ifndef PCI_DEVICE_ID_EIOPCI |
| 397 | #define PCI_DEVICE_ID_EIOPCI 0x0003 |
| 398 | #endif |
| 399 | |
| 400 | /* |
| 401 | * Define structure to hold all Stallion PCI boards. |
| 402 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 404 | static struct pci_device_id stl_pcibrds[] = { |
| 405 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864), |
| 406 | .driver_data = BRD_ECH64PCI }, |
| 407 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI), |
| 408 | .driver_data = BRD_EASYIOPCI }, |
| 409 | { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832), |
| 410 | .driver_data = BRD_ECHPCI }, |
| 411 | { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410), |
| 412 | .driver_data = BRD_ECHPCI }, |
| 413 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | }; |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 415 | MODULE_DEVICE_TABLE(pci, stl_pcibrds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
| 417 | /*****************************************************************************/ |
| 418 | |
| 419 | /* |
| 420 | * Define macros to extract a brd/port number from a minor number. |
| 421 | */ |
| 422 | #define MINOR2BRD(min) (((min) & 0xc0) >> 6) |
| 423 | #define MINOR2PORT(min) ((min) & 0x3f) |
| 424 | |
| 425 | /* |
| 426 | * Define a baud rate table that converts termios baud rate selector |
| 427 | * into the actual baud rate value. All baud rate calculations are |
| 428 | * based on the actual baud rate required. |
| 429 | */ |
| 430 | static unsigned int stl_baudrates[] = { |
| 431 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, |
| 432 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 |
| 433 | }; |
| 434 | |
| 435 | /* |
| 436 | * Define some handy local macros... |
| 437 | */ |
| 438 | #undef MIN |
| 439 | #define MIN(a,b) (((a) <= (b)) ? (a) : (b)) |
| 440 | |
| 441 | #undef TOLOWER |
| 442 | #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x)) |
| 443 | |
| 444 | /*****************************************************************************/ |
| 445 | |
| 446 | /* |
| 447 | * Declare all those functions in this driver! |
| 448 | */ |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | 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] | 451 | static int stl_brdinit(struct stlbrd *brdp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 452 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp); |
| 453 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 454 | static int stl_waitcarrier(struct stlport *portp, struct file *filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | /* |
| 457 | * CD1400 uart specific handling functions. |
| 458 | */ |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 459 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value); |
| 460 | static int stl_cd1400getreg(struct stlport *portp, int regnr); |
| 461 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value); |
| 462 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp); |
| 463 | 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] | 464 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 465 | static int stl_cd1400getsignals(struct stlport *portp); |
| 466 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts); |
| 467 | static void stl_cd1400ccrwait(struct stlport *portp); |
| 468 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx); |
| 469 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx); |
| 470 | static void stl_cd1400disableintrs(struct stlport *portp); |
| 471 | static void stl_cd1400sendbreak(struct stlport *portp, int len); |
| 472 | static void stl_cd1400flowctrl(struct stlport *portp, int state); |
| 473 | static void stl_cd1400sendflow(struct stlport *portp, int state); |
| 474 | static void stl_cd1400flush(struct stlport *portp); |
| 475 | static int stl_cd1400datastate(struct stlport *portp); |
| 476 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase); |
| 477 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase); |
| 478 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr); |
| 479 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr); |
| 480 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 482 | static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | |
| 484 | /* |
| 485 | * SC26198 uart specific handling functions. |
| 486 | */ |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 487 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value); |
| 488 | static int stl_sc26198getreg(struct stlport *portp, int regnr); |
| 489 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value); |
| 490 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr); |
| 491 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp); |
| 492 | 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] | 493 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 494 | static int stl_sc26198getsignals(struct stlport *portp); |
| 495 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts); |
| 496 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx); |
| 497 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx); |
| 498 | static void stl_sc26198disableintrs(struct stlport *portp); |
| 499 | static void stl_sc26198sendbreak(struct stlport *portp, int len); |
| 500 | static void stl_sc26198flowctrl(struct stlport *portp, int state); |
| 501 | static void stl_sc26198sendflow(struct stlport *portp, int state); |
| 502 | static void stl_sc26198flush(struct stlport *portp); |
| 503 | static int stl_sc26198datastate(struct stlport *portp); |
| 504 | static void stl_sc26198wait(struct stlport *portp); |
| 505 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty); |
| 506 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase); |
| 507 | static void stl_sc26198txisr(struct stlport *port); |
| 508 | static void stl_sc26198rxisr(struct stlport *port, unsigned int iack); |
| 509 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch); |
| 510 | static void stl_sc26198rxbadchars(struct stlport *portp); |
| 511 | static void stl_sc26198otherisr(struct stlport *port, unsigned int iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
| 513 | /*****************************************************************************/ |
| 514 | |
| 515 | /* |
| 516 | * Generic UART support structure. |
| 517 | */ |
| 518 | typedef struct uart { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 519 | int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp); |
| 520 | void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 521 | void (*setport)(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 522 | int (*getsignals)(struct stlport *portp); |
| 523 | void (*setsignals)(struct stlport *portp, int dtr, int rts); |
| 524 | void (*enablerxtx)(struct stlport *portp, int rx, int tx); |
| 525 | void (*startrxtx)(struct stlport *portp, int rx, int tx); |
| 526 | void (*disableintrs)(struct stlport *portp); |
| 527 | void (*sendbreak)(struct stlport *portp, int len); |
| 528 | void (*flowctrl)(struct stlport *portp, int state); |
| 529 | void (*sendflow)(struct stlport *portp, int state); |
| 530 | void (*flush)(struct stlport *portp); |
| 531 | int (*datastate)(struct stlport *portp); |
| 532 | void (*intr)(struct stlpanel *panelp, unsigned int iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | } uart_t; |
| 534 | |
| 535 | /* |
| 536 | * Define some macros to make calling these functions nice and clean. |
| 537 | */ |
| 538 | #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) |
| 539 | #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) |
| 540 | #define stl_setport (* ((uart_t *) portp->uartp)->setport) |
| 541 | #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) |
| 542 | #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) |
| 543 | #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) |
| 544 | #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) |
| 545 | #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) |
| 546 | #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) |
| 547 | #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) |
| 548 | #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) |
| 549 | #define stl_flush (* ((uart_t *) portp->uartp)->flush) |
| 550 | #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) |
| 551 | |
| 552 | /*****************************************************************************/ |
| 553 | |
| 554 | /* |
| 555 | * CD1400 UART specific data initialization. |
| 556 | */ |
| 557 | static uart_t stl_cd1400uart = { |
| 558 | stl_cd1400panelinit, |
| 559 | stl_cd1400portinit, |
| 560 | stl_cd1400setport, |
| 561 | stl_cd1400getsignals, |
| 562 | stl_cd1400setsignals, |
| 563 | stl_cd1400enablerxtx, |
| 564 | stl_cd1400startrxtx, |
| 565 | stl_cd1400disableintrs, |
| 566 | stl_cd1400sendbreak, |
| 567 | stl_cd1400flowctrl, |
| 568 | stl_cd1400sendflow, |
| 569 | stl_cd1400flush, |
| 570 | stl_cd1400datastate, |
| 571 | stl_cd1400eiointr |
| 572 | }; |
| 573 | |
| 574 | /* |
| 575 | * Define the offsets within the register bank of a cd1400 based panel. |
| 576 | * These io address offsets are common to the EasyIO board as well. |
| 577 | */ |
| 578 | #define EREG_ADDR 0 |
| 579 | #define EREG_DATA 4 |
| 580 | #define EREG_RXACK 5 |
| 581 | #define EREG_TXACK 6 |
| 582 | #define EREG_MDACK 7 |
| 583 | |
| 584 | #define EREG_BANKSIZE 8 |
| 585 | |
| 586 | #define CD1400_CLK 25000000 |
| 587 | #define CD1400_CLK8M 20000000 |
| 588 | |
| 589 | /* |
| 590 | * Define the cd1400 baud rate clocks. These are used when calculating |
| 591 | * what clock and divisor to use for the required baud rate. Also |
| 592 | * define the maximum baud rate allowed, and the default base baud. |
| 593 | */ |
| 594 | static int stl_cd1400clkdivs[] = { |
| 595 | CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 |
| 596 | }; |
| 597 | |
| 598 | /*****************************************************************************/ |
| 599 | |
| 600 | /* |
| 601 | * SC26198 UART specific data initization. |
| 602 | */ |
| 603 | static uart_t stl_sc26198uart = { |
| 604 | stl_sc26198panelinit, |
| 605 | stl_sc26198portinit, |
| 606 | stl_sc26198setport, |
| 607 | stl_sc26198getsignals, |
| 608 | stl_sc26198setsignals, |
| 609 | stl_sc26198enablerxtx, |
| 610 | stl_sc26198startrxtx, |
| 611 | stl_sc26198disableintrs, |
| 612 | stl_sc26198sendbreak, |
| 613 | stl_sc26198flowctrl, |
| 614 | stl_sc26198sendflow, |
| 615 | stl_sc26198flush, |
| 616 | stl_sc26198datastate, |
| 617 | stl_sc26198intr |
| 618 | }; |
| 619 | |
| 620 | /* |
| 621 | * Define the offsets within the register bank of a sc26198 based panel. |
| 622 | */ |
| 623 | #define XP_DATA 0 |
| 624 | #define XP_ADDR 1 |
| 625 | #define XP_MODID 2 |
| 626 | #define XP_STATUS 2 |
| 627 | #define XP_IACK 3 |
| 628 | |
| 629 | #define XP_BANKSIZE 4 |
| 630 | |
| 631 | /* |
| 632 | * Define the sc26198 baud rate table. Offsets within the table |
| 633 | * represent the actual baud rate selector of sc26198 registers. |
| 634 | */ |
| 635 | static unsigned int sc26198_baudtable[] = { |
| 636 | 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, |
| 637 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, |
| 638 | 230400, 460800, 921600 |
| 639 | }; |
| 640 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 641 | #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | |
| 643 | /*****************************************************************************/ |
| 644 | |
| 645 | /* |
| 646 | * Define the driver info for a user level control device. Used mainly |
| 647 | * to get at port stats - only not using the port device itself. |
| 648 | */ |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 649 | static const struct file_operations stl_fsiomem = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | .owner = THIS_MODULE, |
| 651 | .ioctl = stl_memioctl, |
| 652 | }; |
| 653 | |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 654 | static struct class *stallion_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
| 656 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | * Check for any arguments passed in on the module load command line. |
| 658 | */ |
| 659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | /*****************************************************************************/ |
| 661 | |
| 662 | /* |
| 663 | * Convert an ascii string number into an unsigned long. |
| 664 | */ |
| 665 | |
| 666 | static unsigned long stl_atol(char *str) |
| 667 | { |
| 668 | unsigned long val; |
| 669 | int base, c; |
| 670 | char *sp; |
| 671 | |
| 672 | val = 0; |
| 673 | sp = str; |
| 674 | if ((*sp == '0') && (*(sp+1) == 'x')) { |
| 675 | base = 16; |
| 676 | sp += 2; |
| 677 | } else if (*sp == '0') { |
| 678 | base = 8; |
| 679 | sp++; |
| 680 | } else { |
| 681 | base = 10; |
| 682 | } |
| 683 | |
| 684 | for (; (*sp != 0); sp++) { |
| 685 | c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0'); |
| 686 | if ((c < 0) || (c >= base)) { |
| 687 | printk("STALLION: invalid argument %s\n", str); |
| 688 | val = 0; |
| 689 | break; |
| 690 | } |
| 691 | val = (val * base) + c; |
| 692 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 693 | return val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | /*****************************************************************************/ |
| 697 | |
| 698 | /* |
| 699 | * Parse the supplied argument string, into the board conf struct. |
| 700 | */ |
| 701 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 702 | static int __init stl_parsebrd(struct stlconf *confp, char **argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | { |
| 704 | char *sp; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 705 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 707 | pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 709 | if ((argp[0] == NULL) || (*argp[0] == 0)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 710 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
| 712 | for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) |
| 713 | *sp = TOLOWER(*sp); |
| 714 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 715 | for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | if (strcmp(stl_brdstr[i].name, argp[0]) == 0) |
| 717 | break; |
| 718 | } |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 719 | if (i == ARRAY_SIZE(stl_brdstr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | printk("STALLION: unknown board name, %s?\n", argp[0]); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 721 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | } |
| 723 | |
| 724 | confp->brdtype = stl_brdstr[i].type; |
| 725 | |
| 726 | i = 1; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 727 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | confp->ioaddr1 = stl_atol(argp[i]); |
| 729 | i++; |
| 730 | if (confp->brdtype == BRD_ECH) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 731 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | confp->ioaddr2 = stl_atol(argp[i]); |
| 733 | i++; |
| 734 | } |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 735 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | confp->irq = stl_atol(argp[i]); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 737 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } |
| 739 | |
| 740 | /*****************************************************************************/ |
| 741 | |
| 742 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | * Allocate a new board structure. Fill out the basic info in it. |
| 744 | */ |
| 745 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 746 | static struct stlbrd *stl_allocbrd(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 748 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 750 | brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 751 | if (!brdp) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 752 | printk("STALLION: failed to allocate memory (size=%Zd)\n", |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 753 | sizeof(struct stlbrd)); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 754 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | } |
| 756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | brdp->magic = STL_BOARDMAGIC; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 758 | return brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | } |
| 760 | |
Jiri Slaby | 96b066b | 2006-12-08 02:38:42 -0800 | [diff] [blame] | 761 | static void __init stl_argbrds(void) |
| 762 | { |
| 763 | struct stlconf conf; |
| 764 | struct stlbrd *brdp; |
| 765 | int i; |
| 766 | |
| 767 | pr_debug("stl_argbrds()\n"); |
| 768 | |
| 769 | for (i = stl_nrbrds; (i < stl_nargs); i++) { |
| 770 | memset(&conf, 0, sizeof(conf)); |
| 771 | if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) |
| 772 | continue; |
| 773 | if ((brdp = stl_allocbrd()) == NULL) |
| 774 | continue; |
| 775 | stl_nrbrds = i + 1; |
| 776 | brdp->brdnr = i; |
| 777 | brdp->brdtype = conf.brdtype; |
| 778 | brdp->ioaddr1 = conf.ioaddr1; |
| 779 | brdp->ioaddr2 = conf.ioaddr2; |
| 780 | brdp->irq = conf.irq; |
| 781 | brdp->irqtype = conf.irqtype; |
| 782 | stl_brdinit(brdp); |
| 783 | } |
| 784 | } |
| 785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | /*****************************************************************************/ |
| 787 | |
| 788 | static int stl_open(struct tty_struct *tty, struct file *filp) |
| 789 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 790 | struct stlport *portp; |
| 791 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | unsigned int minordev; |
| 793 | int brdnr, panelnr, portnr, rc; |
| 794 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 795 | 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] | 796 | |
| 797 | minordev = tty->index; |
| 798 | brdnr = MINOR2BRD(minordev); |
| 799 | if (brdnr >= stl_nrbrds) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 800 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 802 | if (brdp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 803 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | minordev = MINOR2PORT(minordev); |
| 805 | for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 806 | if (brdp->panels[panelnr] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | break; |
| 808 | if (minordev < brdp->panels[panelnr]->nrports) { |
| 809 | portnr = minordev; |
| 810 | break; |
| 811 | } |
| 812 | minordev -= brdp->panels[panelnr]->nrports; |
| 813 | } |
| 814 | if (portnr < 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 815 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
| 817 | portp = brdp->panels[panelnr]->ports[portnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 818 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 819 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
| 821 | /* |
| 822 | * On the first open of the device setup the port hardware, and |
| 823 | * initialize the per port data structure. |
| 824 | */ |
| 825 | portp->tty = tty; |
| 826 | tty->driver_data = portp; |
| 827 | portp->refcount++; |
| 828 | |
| 829 | if ((portp->flags & ASYNC_INITIALIZED) == 0) { |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 830 | if (!portp->tx.buf) { |
| 831 | portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); |
| 832 | if (!portp->tx.buf) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 833 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | portp->tx.head = portp->tx.buf; |
| 835 | portp->tx.tail = portp->tx.buf; |
| 836 | } |
| 837 | stl_setport(portp, tty->termios); |
| 838 | portp->sigs = stl_getsignals(portp); |
| 839 | stl_setsignals(portp, 1, 1); |
| 840 | stl_enablerxtx(portp, 1, 1); |
| 841 | stl_startrxtx(portp, 1, 0); |
| 842 | clear_bit(TTY_IO_ERROR, &tty->flags); |
| 843 | portp->flags |= ASYNC_INITIALIZED; |
| 844 | } |
| 845 | |
| 846 | /* |
| 847 | * Check if this port is in the middle of closing. If so then wait |
| 848 | * until it is closed then return error status, based on flag settings. |
| 849 | * The sleep here does not need interrupt protection since the wakeup |
| 850 | * for it is done with the same context. |
| 851 | */ |
| 852 | if (portp->flags & ASYNC_CLOSING) { |
| 853 | interruptible_sleep_on(&portp->close_wait); |
| 854 | if (portp->flags & ASYNC_HUP_NOTIFY) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 855 | return -EAGAIN; |
| 856 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | } |
| 858 | |
| 859 | /* |
| 860 | * Based on type of open being done check if it can overlap with any |
| 861 | * previous opens still in effect. If we are a normal serial device |
| 862 | * then also we might have to wait for carrier. |
| 863 | */ |
| 864 | if (!(filp->f_flags & O_NONBLOCK)) { |
| 865 | if ((rc = stl_waitcarrier(portp, filp)) != 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 866 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | } |
| 868 | portp->flags |= ASYNC_NORMAL_ACTIVE; |
| 869 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 870 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | } |
| 872 | |
| 873 | /*****************************************************************************/ |
| 874 | |
| 875 | /* |
| 876 | * Possibly need to wait for carrier (DCD signal) to come high. Say |
| 877 | * maybe because if we are clocal then we don't need to wait... |
| 878 | */ |
| 879 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 880 | static int stl_waitcarrier(struct stlport *portp, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | { |
| 882 | unsigned long flags; |
| 883 | int rc, doclocal; |
| 884 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 885 | pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
| 887 | rc = 0; |
| 888 | doclocal = 0; |
| 889 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 890 | spin_lock_irqsave(&stallion_lock, flags); |
| 891 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | if (portp->tty->termios->c_cflag & CLOCAL) |
| 893 | doclocal++; |
| 894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | portp->openwaitcnt++; |
| 896 | if (! tty_hung_up_p(filp)) |
| 897 | portp->refcount--; |
| 898 | |
| 899 | for (;;) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 900 | /* Takes brd_lock internally */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | stl_setsignals(portp, 1, 1); |
| 902 | if (tty_hung_up_p(filp) || |
| 903 | ((portp->flags & ASYNC_INITIALIZED) == 0)) { |
| 904 | if (portp->flags & ASYNC_HUP_NOTIFY) |
| 905 | rc = -EBUSY; |
| 906 | else |
| 907 | rc = -ERESTARTSYS; |
| 908 | break; |
| 909 | } |
| 910 | if (((portp->flags & ASYNC_CLOSING) == 0) && |
| 911 | (doclocal || (portp->sigs & TIOCM_CD))) { |
| 912 | break; |
| 913 | } |
| 914 | if (signal_pending(current)) { |
| 915 | rc = -ERESTARTSYS; |
| 916 | break; |
| 917 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 918 | /* FIXME */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | interruptible_sleep_on(&portp->open_wait); |
| 920 | } |
| 921 | |
| 922 | if (! tty_hung_up_p(filp)) |
| 923 | portp->refcount++; |
| 924 | portp->openwaitcnt--; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 925 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 927 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | } |
| 929 | |
| 930 | /*****************************************************************************/ |
| 931 | |
Jiri Slaby | 96b066b | 2006-12-08 02:38:42 -0800 | [diff] [blame] | 932 | static void stl_flushbuffer(struct tty_struct *tty) |
| 933 | { |
| 934 | struct stlport *portp; |
| 935 | |
| 936 | pr_debug("stl_flushbuffer(tty=%p)\n", tty); |
| 937 | |
| 938 | if (tty == NULL) |
| 939 | return; |
| 940 | portp = tty->driver_data; |
| 941 | if (portp == NULL) |
| 942 | return; |
| 943 | |
| 944 | stl_flush(portp); |
| 945 | tty_wakeup(tty); |
| 946 | } |
| 947 | |
| 948 | /*****************************************************************************/ |
| 949 | |
| 950 | static void stl_waituntilsent(struct tty_struct *tty, int timeout) |
| 951 | { |
| 952 | struct stlport *portp; |
| 953 | unsigned long tend; |
| 954 | |
| 955 | pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout); |
| 956 | |
| 957 | if (tty == NULL) |
| 958 | return; |
| 959 | portp = tty->driver_data; |
| 960 | if (portp == NULL) |
| 961 | return; |
| 962 | |
| 963 | if (timeout == 0) |
| 964 | timeout = HZ; |
| 965 | tend = jiffies + timeout; |
| 966 | |
| 967 | while (stl_datastate(portp)) { |
| 968 | if (signal_pending(current)) |
| 969 | break; |
| 970 | msleep_interruptible(20); |
| 971 | if (time_after_eq(jiffies, tend)) |
| 972 | break; |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | /*****************************************************************************/ |
| 977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | static void stl_close(struct tty_struct *tty, struct file *filp) |
| 979 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 980 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | unsigned long flags; |
| 982 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 983 | pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | |
| 985 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 986 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | return; |
| 988 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 989 | spin_lock_irqsave(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | if (tty_hung_up_p(filp)) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 991 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | return; |
| 993 | } |
| 994 | if ((tty->count == 1) && (portp->refcount != 1)) |
| 995 | portp->refcount = 1; |
| 996 | if (portp->refcount-- > 1) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 997 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | return; |
| 999 | } |
| 1000 | |
| 1001 | portp->refcount = 0; |
| 1002 | portp->flags |= ASYNC_CLOSING; |
| 1003 | |
| 1004 | /* |
| 1005 | * May want to wait for any data to drain before closing. The BUSY |
| 1006 | * flag keeps track of whether we are still sending or not - it is |
| 1007 | * very accurate for the cd1400, not quite so for the sc26198. |
| 1008 | * (The sc26198 has no "end-of-data" interrupt only empty FIFO) |
| 1009 | */ |
| 1010 | tty->closing = 1; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1011 | |
| 1012 | spin_unlock_irqrestore(&stallion_lock, flags); |
| 1013 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| 1015 | tty_wait_until_sent(tty, portp->closing_wait); |
| 1016 | stl_waituntilsent(tty, (HZ / 2)); |
| 1017 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1018 | |
| 1019 | spin_lock_irqsave(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | portp->flags &= ~ASYNC_INITIALIZED; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1021 | spin_unlock_irqrestore(&stallion_lock, flags); |
| 1022 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | stl_disableintrs(portp); |
| 1024 | if (tty->termios->c_cflag & HUPCL) |
| 1025 | stl_setsignals(portp, 0, 0); |
| 1026 | stl_enablerxtx(portp, 0, 0); |
| 1027 | stl_flushbuffer(tty); |
| 1028 | portp->istate = 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1029 | if (portp->tx.buf != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | kfree(portp->tx.buf); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1031 | portp->tx.buf = NULL; |
| 1032 | portp->tx.head = NULL; |
| 1033 | portp->tx.tail = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | } |
| 1035 | set_bit(TTY_IO_ERROR, &tty->flags); |
| 1036 | tty_ldisc_flush(tty); |
| 1037 | |
| 1038 | tty->closing = 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1039 | portp->tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | |
| 1041 | if (portp->openwaitcnt) { |
| 1042 | if (portp->close_delay) |
| 1043 | msleep_interruptible(jiffies_to_msecs(portp->close_delay)); |
| 1044 | wake_up_interruptible(&portp->open_wait); |
| 1045 | } |
| 1046 | |
| 1047 | portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 1048 | wake_up_interruptible(&portp->close_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | /*****************************************************************************/ |
| 1052 | |
| 1053 | /* |
| 1054 | * Write routine. Take data and stuff it in to the TX ring queue. |
| 1055 | * If transmit interrupts are not running then start them. |
| 1056 | */ |
| 1057 | |
| 1058 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| 1059 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1060 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | unsigned int len, stlen; |
| 1062 | unsigned char *chbuf; |
| 1063 | char *head, *tail; |
| 1064 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1065 | 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] | 1066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1068 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1069 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1070 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1071 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | |
| 1073 | /* |
| 1074 | * If copying direct from user space we must cater for page faults, |
| 1075 | * causing us to "sleep" here for a while. To handle this copy in all |
| 1076 | * the data we need now, into a local buffer. Then when we got it all |
| 1077 | * copy it into the TX buffer. |
| 1078 | */ |
| 1079 | chbuf = (unsigned char *) buf; |
| 1080 | |
| 1081 | head = portp->tx.head; |
| 1082 | tail = portp->tx.tail; |
| 1083 | if (head >= tail) { |
| 1084 | len = STL_TXBUFSIZE - (head - tail) - 1; |
| 1085 | stlen = STL_TXBUFSIZE - (head - portp->tx.buf); |
| 1086 | } else { |
| 1087 | len = tail - head - 1; |
| 1088 | stlen = len; |
| 1089 | } |
| 1090 | |
| 1091 | len = MIN(len, count); |
| 1092 | count = 0; |
| 1093 | while (len > 0) { |
| 1094 | stlen = MIN(len, stlen); |
| 1095 | memcpy(head, chbuf, stlen); |
| 1096 | len -= stlen; |
| 1097 | chbuf += stlen; |
| 1098 | count += stlen; |
| 1099 | head += stlen; |
| 1100 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { |
| 1101 | head = portp->tx.buf; |
| 1102 | stlen = tail - head; |
| 1103 | } |
| 1104 | } |
| 1105 | portp->tx.head = head; |
| 1106 | |
| 1107 | clear_bit(ASYI_TXLOW, &portp->istate); |
| 1108 | stl_startrxtx(portp, -1, 1); |
| 1109 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1110 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | } |
| 1112 | |
| 1113 | /*****************************************************************************/ |
| 1114 | |
| 1115 | static void stl_putchar(struct tty_struct *tty, unsigned char ch) |
| 1116 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1117 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | unsigned int len; |
| 1119 | char *head, *tail; |
| 1120 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1121 | pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1123 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | return; |
| 1125 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1126 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | return; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1128 | if (portp->tx.buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | return; |
| 1130 | |
| 1131 | head = portp->tx.head; |
| 1132 | tail = portp->tx.tail; |
| 1133 | |
| 1134 | len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); |
| 1135 | len--; |
| 1136 | |
| 1137 | if (len > 0) { |
| 1138 | *head++ = ch; |
| 1139 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 1140 | head = portp->tx.buf; |
| 1141 | } |
| 1142 | portp->tx.head = head; |
| 1143 | } |
| 1144 | |
| 1145 | /*****************************************************************************/ |
| 1146 | |
| 1147 | /* |
| 1148 | * If there are any characters in the buffer then make sure that TX |
| 1149 | * interrupts are on and get'em out. Normally used after the putchar |
| 1150 | * routine has been called. |
| 1151 | */ |
| 1152 | |
| 1153 | static void stl_flushchars(struct tty_struct *tty) |
| 1154 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1155 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1157 | pr_debug("stl_flushchars(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1159 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | return; |
| 1161 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1162 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | return; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1164 | if (portp->tx.buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | return; |
| 1166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | stl_startrxtx(portp, -1, 1); |
| 1168 | } |
| 1169 | |
| 1170 | /*****************************************************************************/ |
| 1171 | |
| 1172 | static int stl_writeroom(struct tty_struct *tty) |
| 1173 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1174 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | char *head, *tail; |
| 1176 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1177 | pr_debug("stl_writeroom(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1179 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1180 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1182 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1183 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1184 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1185 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | |
| 1187 | head = portp->tx.head; |
| 1188 | tail = portp->tx.tail; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1189 | return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | } |
| 1191 | |
| 1192 | /*****************************************************************************/ |
| 1193 | |
| 1194 | /* |
| 1195 | * Return number of chars in the TX buffer. Normally we would just |
| 1196 | * calculate the number of chars in the buffer and return that, but if |
| 1197 | * the buffer is empty and TX interrupts are still on then we return |
| 1198 | * that the buffer still has 1 char in it. This way whoever called us |
| 1199 | * will not think that ALL chars have drained - since the UART still |
| 1200 | * must have some chars in it (we are busy after all). |
| 1201 | */ |
| 1202 | |
| 1203 | static int stl_charsinbuffer(struct tty_struct *tty) |
| 1204 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1205 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | unsigned int size; |
| 1207 | char *head, *tail; |
| 1208 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1209 | pr_debug("stl_charsinbuffer(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1211 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1212 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1214 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1215 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1216 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1217 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
| 1219 | head = portp->tx.head; |
| 1220 | tail = portp->tx.tail; |
| 1221 | size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 1222 | if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) |
| 1223 | size = 1; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1224 | return size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | } |
| 1226 | |
| 1227 | /*****************************************************************************/ |
| 1228 | |
| 1229 | /* |
| 1230 | * Generate the serial struct info. |
| 1231 | */ |
| 1232 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1233 | static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | { |
| 1235 | struct serial_struct sio; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1236 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1238 | pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | |
| 1240 | memset(&sio, 0, sizeof(struct serial_struct)); |
| 1241 | sio.line = portp->portnr; |
| 1242 | sio.port = portp->ioaddr; |
| 1243 | sio.flags = portp->flags; |
| 1244 | sio.baud_base = portp->baud_base; |
| 1245 | sio.close_delay = portp->close_delay; |
| 1246 | sio.closing_wait = portp->closing_wait; |
| 1247 | sio.custom_divisor = portp->custom_divisor; |
| 1248 | sio.hub6 = 0; |
| 1249 | if (portp->uartp == &stl_cd1400uart) { |
| 1250 | sio.type = PORT_CIRRUS; |
| 1251 | sio.xmit_fifo_size = CD1400_TXFIFOSIZE; |
| 1252 | } else { |
| 1253 | sio.type = PORT_UNKNOWN; |
| 1254 | sio.xmit_fifo_size = SC26198_TXFIFOSIZE; |
| 1255 | } |
| 1256 | |
| 1257 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1258 | if (brdp != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | sio.irq = brdp->irq; |
| 1260 | |
| 1261 | return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; |
| 1262 | } |
| 1263 | |
| 1264 | /*****************************************************************************/ |
| 1265 | |
| 1266 | /* |
| 1267 | * Set port according to the serial struct info. |
| 1268 | * At this point we do not do any auto-configure stuff, so we will |
| 1269 | * just quietly ignore any requests to change irq, etc. |
| 1270 | */ |
| 1271 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1272 | static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | { |
| 1274 | struct serial_struct sio; |
| 1275 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1276 | pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | |
| 1278 | if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) |
| 1279 | return -EFAULT; |
| 1280 | if (!capable(CAP_SYS_ADMIN)) { |
| 1281 | if ((sio.baud_base != portp->baud_base) || |
| 1282 | (sio.close_delay != portp->close_delay) || |
| 1283 | ((sio.flags & ~ASYNC_USR_MASK) != |
| 1284 | (portp->flags & ~ASYNC_USR_MASK))) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1285 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | } |
| 1287 | |
| 1288 | portp->flags = (portp->flags & ~ASYNC_USR_MASK) | |
| 1289 | (sio.flags & ASYNC_USR_MASK); |
| 1290 | portp->baud_base = sio.baud_base; |
| 1291 | portp->close_delay = sio.close_delay; |
| 1292 | portp->closing_wait = sio.closing_wait; |
| 1293 | portp->custom_divisor = sio.custom_divisor; |
| 1294 | stl_setport(portp, portp->tty->termios); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1295 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
| 1297 | |
| 1298 | /*****************************************************************************/ |
| 1299 | |
| 1300 | static int stl_tiocmget(struct tty_struct *tty, struct file *file) |
| 1301 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1302 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1304 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1305 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1307 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1308 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1310 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | |
| 1312 | return stl_getsignals(portp); |
| 1313 | } |
| 1314 | |
| 1315 | static int stl_tiocmset(struct tty_struct *tty, struct file *file, |
| 1316 | unsigned int set, unsigned int clear) |
| 1317 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1318 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | int rts = -1, dtr = -1; |
| 1320 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1321 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1322 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1324 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1325 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1327 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | |
| 1329 | if (set & TIOCM_RTS) |
| 1330 | rts = 1; |
| 1331 | if (set & TIOCM_DTR) |
| 1332 | dtr = 1; |
| 1333 | if (clear & TIOCM_RTS) |
| 1334 | rts = 0; |
| 1335 | if (clear & TIOCM_DTR) |
| 1336 | dtr = 0; |
| 1337 | |
| 1338 | stl_setsignals(portp, dtr, rts); |
| 1339 | return 0; |
| 1340 | } |
| 1341 | |
| 1342 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) |
| 1343 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1344 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | unsigned int ival; |
| 1346 | int rc; |
| 1347 | void __user *argp = (void __user *)arg; |
| 1348 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1349 | pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd, |
| 1350 | arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1352 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1353 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1355 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1356 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | |
| 1358 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
| 1359 | (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { |
| 1360 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1361 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
| 1363 | |
| 1364 | rc = 0; |
| 1365 | |
| 1366 | switch (cmd) { |
| 1367 | case TIOCGSOFTCAR: |
| 1368 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), |
| 1369 | (unsigned __user *) argp); |
| 1370 | break; |
| 1371 | case TIOCSSOFTCAR: |
| 1372 | if (get_user(ival, (unsigned int __user *) arg)) |
| 1373 | return -EFAULT; |
| 1374 | tty->termios->c_cflag = |
| 1375 | (tty->termios->c_cflag & ~CLOCAL) | |
| 1376 | (ival ? CLOCAL : 0); |
| 1377 | break; |
| 1378 | case TIOCGSERIAL: |
| 1379 | rc = stl_getserial(portp, argp); |
| 1380 | break; |
| 1381 | case TIOCSSERIAL: |
| 1382 | rc = stl_setserial(portp, argp); |
| 1383 | break; |
| 1384 | case COM_GETPORTSTATS: |
| 1385 | rc = stl_getportstats(portp, argp); |
| 1386 | break; |
| 1387 | case COM_CLRPORTSTATS: |
| 1388 | rc = stl_clrportstats(portp, argp); |
| 1389 | break; |
| 1390 | case TIOCSERCONFIG: |
| 1391 | case TIOCSERGWILD: |
| 1392 | case TIOCSERSWILD: |
| 1393 | case TIOCSERGETLSR: |
| 1394 | case TIOCSERGSTRUCT: |
| 1395 | case TIOCSERGETMULTI: |
| 1396 | case TIOCSERSETMULTI: |
| 1397 | default: |
| 1398 | rc = -ENOIOCTLCMD; |
| 1399 | break; |
| 1400 | } |
| 1401 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1402 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | } |
| 1404 | |
| 1405 | /*****************************************************************************/ |
| 1406 | |
Jiri Slaby | 96b066b | 2006-12-08 02:38:42 -0800 | [diff] [blame] | 1407 | /* |
| 1408 | * Start the transmitter again. Just turn TX interrupts back on. |
| 1409 | */ |
| 1410 | |
| 1411 | static void stl_start(struct tty_struct *tty) |
| 1412 | { |
| 1413 | struct stlport *portp; |
| 1414 | |
| 1415 | pr_debug("stl_start(tty=%p)\n", tty); |
| 1416 | |
| 1417 | if (tty == NULL) |
| 1418 | return; |
| 1419 | portp = tty->driver_data; |
| 1420 | if (portp == NULL) |
| 1421 | return; |
| 1422 | stl_startrxtx(portp, -1, 1); |
| 1423 | } |
| 1424 | |
| 1425 | /*****************************************************************************/ |
| 1426 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1427 | static void stl_settermios(struct tty_struct *tty, struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1429 | struct stlport *portp; |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1430 | struct ktermios *tiosp; |
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_settermios(tty=%p,old=%p)\n", tty, old); |
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 | tiosp = tty->termios; |
| 1441 | if ((tiosp->c_cflag == old->c_cflag) && |
| 1442 | (tiosp->c_iflag == old->c_iflag)) |
| 1443 | return; |
| 1444 | |
| 1445 | stl_setport(portp, tiosp); |
| 1446 | stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), |
| 1447 | -1); |
| 1448 | if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { |
| 1449 | tty->hw_stopped = 0; |
| 1450 | stl_start(tty); |
| 1451 | } |
| 1452 | if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) |
| 1453 | wake_up_interruptible(&portp->open_wait); |
| 1454 | } |
| 1455 | |
| 1456 | /*****************************************************************************/ |
| 1457 | |
| 1458 | /* |
| 1459 | * Attempt to flow control who ever is sending us data. Based on termios |
| 1460 | * settings use software or/and hardware flow control. |
| 1461 | */ |
| 1462 | |
| 1463 | static void stl_throttle(struct tty_struct *tty) |
| 1464 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1465 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1467 | pr_debug("stl_throttle(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1469 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | return; |
| 1471 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1472 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | return; |
| 1474 | stl_flowctrl(portp, 0); |
| 1475 | } |
| 1476 | |
| 1477 | /*****************************************************************************/ |
| 1478 | |
| 1479 | /* |
| 1480 | * Unflow control the device sending us data... |
| 1481 | */ |
| 1482 | |
| 1483 | static void stl_unthrottle(struct tty_struct *tty) |
| 1484 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1485 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1487 | pr_debug("stl_unthrottle(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1489 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | return; |
| 1491 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1492 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | return; |
| 1494 | stl_flowctrl(portp, 1); |
| 1495 | } |
| 1496 | |
| 1497 | /*****************************************************************************/ |
| 1498 | |
| 1499 | /* |
| 1500 | * Stop the transmitter. Basically to do this we will just turn TX |
| 1501 | * interrupts off. |
| 1502 | */ |
| 1503 | |
| 1504 | static void stl_stop(struct tty_struct *tty) |
| 1505 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1506 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1508 | pr_debug("stl_stop(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1510 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | return; |
| 1512 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1513 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | return; |
| 1515 | stl_startrxtx(portp, -1, 0); |
| 1516 | } |
| 1517 | |
| 1518 | /*****************************************************************************/ |
| 1519 | |
| 1520 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | * Hangup this port. This is pretty much like closing the port, only |
| 1522 | * a little more brutal. No waiting for data to drain. Shutdown the |
| 1523 | * port and maybe drop signals. |
| 1524 | */ |
| 1525 | |
| 1526 | static void stl_hangup(struct tty_struct *tty) |
| 1527 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1528 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1530 | pr_debug("stl_hangup(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1532 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | return; |
| 1534 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1535 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | return; |
| 1537 | |
| 1538 | portp->flags &= ~ASYNC_INITIALIZED; |
| 1539 | stl_disableintrs(portp); |
| 1540 | if (tty->termios->c_cflag & HUPCL) |
| 1541 | stl_setsignals(portp, 0, 0); |
| 1542 | stl_enablerxtx(portp, 0, 0); |
| 1543 | stl_flushbuffer(tty); |
| 1544 | portp->istate = 0; |
| 1545 | set_bit(TTY_IO_ERROR, &tty->flags); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1546 | if (portp->tx.buf != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | kfree(portp->tx.buf); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1548 | portp->tx.buf = NULL; |
| 1549 | portp->tx.head = NULL; |
| 1550 | portp->tx.tail = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | } |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1552 | portp->tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | portp->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 1554 | portp->refcount = 0; |
| 1555 | wake_up_interruptible(&portp->open_wait); |
| 1556 | } |
| 1557 | |
| 1558 | /*****************************************************************************/ |
| 1559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1560 | static void stl_breakctl(struct tty_struct *tty, int state) |
| 1561 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1562 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1564 | pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1566 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | return; |
| 1568 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1569 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | return; |
| 1571 | |
| 1572 | stl_sendbreak(portp, ((state == -1) ? 1 : 2)); |
| 1573 | } |
| 1574 | |
| 1575 | /*****************************************************************************/ |
| 1576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | static void stl_sendxchar(struct tty_struct *tty, char ch) |
| 1578 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1579 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1581 | pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1583 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | return; |
| 1585 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1586 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | return; |
| 1588 | |
| 1589 | if (ch == STOP_CHAR(tty)) |
| 1590 | stl_sendflow(portp, 0); |
| 1591 | else if (ch == START_CHAR(tty)) |
| 1592 | stl_sendflow(portp, 1); |
| 1593 | else |
| 1594 | stl_putchar(tty, ch); |
| 1595 | } |
| 1596 | |
| 1597 | /*****************************************************************************/ |
| 1598 | |
| 1599 | #define MAXLINE 80 |
| 1600 | |
| 1601 | /* |
| 1602 | * Format info for a specified port. The line is deliberately limited |
| 1603 | * to 80 characters. (If it is too long it will be truncated, if too |
| 1604 | * short then padded with spaces). |
| 1605 | */ |
| 1606 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1607 | static int stl_portinfo(struct stlport *portp, int portnr, char *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | { |
| 1609 | char *sp; |
| 1610 | int sigs, cnt; |
| 1611 | |
| 1612 | sp = pos; |
| 1613 | sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", |
| 1614 | portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", |
| 1615 | (int) portp->stats.txtotal, (int) portp->stats.rxtotal); |
| 1616 | |
| 1617 | if (portp->stats.rxframing) |
| 1618 | sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); |
| 1619 | if (portp->stats.rxparity) |
| 1620 | sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); |
| 1621 | if (portp->stats.rxbreaks) |
| 1622 | sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); |
| 1623 | if (portp->stats.rxoverrun) |
| 1624 | sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); |
| 1625 | |
| 1626 | sigs = stl_getsignals(portp); |
| 1627 | cnt = sprintf(sp, "%s%s%s%s%s ", |
| 1628 | (sigs & TIOCM_RTS) ? "|RTS" : "", |
| 1629 | (sigs & TIOCM_CTS) ? "|CTS" : "", |
| 1630 | (sigs & TIOCM_DTR) ? "|DTR" : "", |
| 1631 | (sigs & TIOCM_CD) ? "|DCD" : "", |
| 1632 | (sigs & TIOCM_DSR) ? "|DSR" : ""); |
| 1633 | *sp = ' '; |
| 1634 | sp += cnt; |
| 1635 | |
| 1636 | for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) |
| 1637 | *sp++ = ' '; |
| 1638 | if (cnt >= MAXLINE) |
| 1639 | pos[(MAXLINE - 2)] = '+'; |
| 1640 | pos[(MAXLINE - 1)] = '\n'; |
| 1641 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1642 | return MAXLINE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | } |
| 1644 | |
| 1645 | /*****************************************************************************/ |
| 1646 | |
| 1647 | /* |
| 1648 | * Port info, read from the /proc file system. |
| 1649 | */ |
| 1650 | |
| 1651 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) |
| 1652 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1653 | struct stlbrd *brdp; |
| 1654 | struct stlpanel *panelp; |
| 1655 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | int brdnr, panelnr, portnr, totalport; |
| 1657 | int curoff, maxoff; |
| 1658 | char *pos; |
| 1659 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1660 | pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p," |
| 1661 | "data=%p\n", page, start, off, count, eof, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | |
| 1663 | pos = page; |
| 1664 | totalport = 0; |
| 1665 | curoff = 0; |
| 1666 | |
| 1667 | if (off == 0) { |
| 1668 | pos += sprintf(pos, "%s: version %s", stl_drvtitle, |
| 1669 | stl_drvversion); |
| 1670 | while (pos < (page + MAXLINE - 1)) |
| 1671 | *pos++ = ' '; |
| 1672 | *pos++ = '\n'; |
| 1673 | } |
| 1674 | curoff = MAXLINE; |
| 1675 | |
| 1676 | /* |
| 1677 | * We scan through for each board, panel and port. The offset is |
| 1678 | * calculated on the fly, and irrelevant ports are skipped. |
| 1679 | */ |
| 1680 | for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) { |
| 1681 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1682 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | continue; |
| 1684 | if (brdp->state == 0) |
| 1685 | continue; |
| 1686 | |
| 1687 | maxoff = curoff + (brdp->nrports * MAXLINE); |
| 1688 | if (off >= maxoff) { |
| 1689 | curoff = maxoff; |
| 1690 | continue; |
| 1691 | } |
| 1692 | |
| 1693 | totalport = brdnr * STL_MAXPORTS; |
| 1694 | for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { |
| 1695 | panelp = brdp->panels[panelnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1696 | if (panelp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | continue; |
| 1698 | |
| 1699 | maxoff = curoff + (panelp->nrports * MAXLINE); |
| 1700 | if (off >= maxoff) { |
| 1701 | curoff = maxoff; |
| 1702 | totalport += panelp->nrports; |
| 1703 | continue; |
| 1704 | } |
| 1705 | |
| 1706 | for (portnr = 0; (portnr < panelp->nrports); portnr++, |
| 1707 | totalport++) { |
| 1708 | portp = panelp->ports[portnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1709 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | continue; |
| 1711 | if (off >= (curoff += MAXLINE)) |
| 1712 | continue; |
| 1713 | if ((pos - page + MAXLINE) > count) |
| 1714 | goto stl_readdone; |
| 1715 | pos += stl_portinfo(portp, totalport, pos); |
| 1716 | } |
| 1717 | } |
| 1718 | } |
| 1719 | |
| 1720 | *eof = 1; |
| 1721 | |
| 1722 | stl_readdone: |
| 1723 | *start = page; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1724 | return (pos - page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | } |
| 1726 | |
| 1727 | /*****************************************************************************/ |
| 1728 | |
| 1729 | /* |
| 1730 | * All board interrupts are vectored through here first. This code then |
| 1731 | * calls off to the approrpriate board interrupt handlers. |
| 1732 | */ |
| 1733 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1734 | static irqreturn_t stl_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1736 | struct stlbrd *brdp = dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1738 | pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | |
| 1740 | return IRQ_RETVAL((* brdp->isr)(brdp)); |
| 1741 | } |
| 1742 | |
| 1743 | /*****************************************************************************/ |
| 1744 | |
| 1745 | /* |
| 1746 | * Interrupt service routine for EasyIO board types. |
| 1747 | */ |
| 1748 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1749 | static int stl_eiointr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1751 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | unsigned int iobase; |
| 1753 | int handled = 0; |
| 1754 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1755 | spin_lock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | panelp = brdp->panels[0]; |
| 1757 | iobase = panelp->iobase; |
| 1758 | while (inb(brdp->iostatus) & EIO_INTRPEND) { |
| 1759 | handled = 1; |
| 1760 | (* panelp->isr)(panelp, iobase); |
| 1761 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1762 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | return handled; |
| 1764 | } |
| 1765 | |
| 1766 | /*****************************************************************************/ |
| 1767 | |
| 1768 | /* |
| 1769 | * Interrupt service routine for ECH-AT board types. |
| 1770 | */ |
| 1771 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1772 | static int stl_echatintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1774 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | unsigned int ioaddr; |
| 1776 | int bnknr; |
| 1777 | int handled = 0; |
| 1778 | |
| 1779 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
| 1780 | |
| 1781 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
| 1782 | handled = 1; |
| 1783 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1784 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1785 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1786 | panelp = brdp->bnk2panel[bnknr]; |
| 1787 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1788 | } |
| 1789 | } |
| 1790 | } |
| 1791 | |
| 1792 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| 1793 | |
| 1794 | return handled; |
| 1795 | } |
| 1796 | |
| 1797 | /*****************************************************************************/ |
| 1798 | |
| 1799 | /* |
| 1800 | * Interrupt service routine for ECH-MCA board types. |
| 1801 | */ |
| 1802 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1803 | static int stl_echmcaintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1805 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | unsigned int ioaddr; |
| 1807 | int bnknr; |
| 1808 | int handled = 0; |
| 1809 | |
| 1810 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
| 1811 | handled = 1; |
| 1812 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1813 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1814 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1815 | panelp = brdp->bnk2panel[bnknr]; |
| 1816 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1817 | } |
| 1818 | } |
| 1819 | } |
| 1820 | return handled; |
| 1821 | } |
| 1822 | |
| 1823 | /*****************************************************************************/ |
| 1824 | |
| 1825 | /* |
| 1826 | * Interrupt service routine for ECH-PCI board types. |
| 1827 | */ |
| 1828 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1829 | static int stl_echpciintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1831 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | unsigned int ioaddr; |
| 1833 | int bnknr, recheck; |
| 1834 | int handled = 0; |
| 1835 | |
| 1836 | while (1) { |
| 1837 | recheck = 0; |
| 1838 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1839 | outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); |
| 1840 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1841 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1842 | panelp = brdp->bnk2panel[bnknr]; |
| 1843 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1844 | recheck++; |
| 1845 | handled = 1; |
| 1846 | } |
| 1847 | } |
| 1848 | if (! recheck) |
| 1849 | break; |
| 1850 | } |
| 1851 | return handled; |
| 1852 | } |
| 1853 | |
| 1854 | /*****************************************************************************/ |
| 1855 | |
| 1856 | /* |
| 1857 | * Interrupt service routine for ECH-8/64-PCI board types. |
| 1858 | */ |
| 1859 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1860 | static int stl_echpci64intr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1862 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | unsigned int ioaddr; |
| 1864 | int bnknr; |
| 1865 | int handled = 0; |
| 1866 | |
| 1867 | while (inb(brdp->ioctrl) & 0x1) { |
| 1868 | handled = 1; |
| 1869 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1870 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1871 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1872 | panelp = brdp->bnk2panel[bnknr]; |
| 1873 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1874 | } |
| 1875 | } |
| 1876 | } |
| 1877 | |
| 1878 | return handled; |
| 1879 | } |
| 1880 | |
| 1881 | /*****************************************************************************/ |
| 1882 | |
| 1883 | /* |
| 1884 | * Service an off-level request for some channel. |
| 1885 | */ |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 1886 | static void stl_offintr(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1888 | struct stlport *portp = container_of(work, struct stlport, tqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1889 | struct tty_struct *tty; |
| 1890 | unsigned int oldsigs; |
| 1891 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1892 | pr_debug("stl_offintr(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1894 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | return; |
| 1896 | |
| 1897 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1898 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | return; |
| 1900 | |
| 1901 | lock_kernel(); |
| 1902 | if (test_bit(ASYI_TXLOW, &portp->istate)) { |
| 1903 | tty_wakeup(tty); |
| 1904 | } |
| 1905 | if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { |
| 1906 | clear_bit(ASYI_DCDCHANGE, &portp->istate); |
| 1907 | oldsigs = portp->sigs; |
| 1908 | portp->sigs = stl_getsignals(portp); |
| 1909 | if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) |
| 1910 | wake_up_interruptible(&portp->open_wait); |
| 1911 | if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { |
| 1912 | if (portp->flags & ASYNC_CHECK_CD) |
| 1913 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ |
| 1914 | } |
| 1915 | } |
| 1916 | unlock_kernel(); |
| 1917 | } |
| 1918 | |
| 1919 | /*****************************************************************************/ |
| 1920 | |
| 1921 | /* |
| 1922 | * Initialize all the ports on a panel. |
| 1923 | */ |
| 1924 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1925 | static int __init stl_initports(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1927 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | int chipmask, i; |
| 1929 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1930 | pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | |
| 1932 | chipmask = stl_panelinit(brdp, panelp); |
| 1933 | |
| 1934 | /* |
| 1935 | * All UART's are initialized (if found!). Now go through and setup |
| 1936 | * each ports data structures. |
| 1937 | */ |
| 1938 | for (i = 0; (i < panelp->nrports); i++) { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1939 | portp = kzalloc(sizeof(struct stlport), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 1940 | if (!portp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | printk("STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1942 | "(size=%Zd)\n", sizeof(struct stlport)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | break; |
| 1944 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | |
| 1946 | portp->magic = STL_PORTMAGIC; |
| 1947 | portp->portnr = i; |
| 1948 | portp->brdnr = panelp->brdnr; |
| 1949 | portp->panelnr = panelp->panelnr; |
| 1950 | portp->uartp = panelp->uartp; |
| 1951 | portp->clk = brdp->clk; |
| 1952 | portp->baud_base = STL_BAUDBASE; |
| 1953 | portp->close_delay = STL_CLOSEDELAY; |
| 1954 | portp->closing_wait = 30 * HZ; |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 1955 | INIT_WORK(&portp->tqueue, stl_offintr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | init_waitqueue_head(&portp->open_wait); |
| 1957 | init_waitqueue_head(&portp->close_wait); |
| 1958 | portp->stats.brd = portp->brdnr; |
| 1959 | portp->stats.panel = portp->panelnr; |
| 1960 | portp->stats.port = portp->portnr; |
| 1961 | panelp->ports[i] = portp; |
| 1962 | stl_portinit(brdp, panelp, portp); |
| 1963 | } |
| 1964 | |
| 1965 | return(0); |
| 1966 | } |
| 1967 | |
| 1968 | /*****************************************************************************/ |
| 1969 | |
| 1970 | /* |
| 1971 | * Try to find and initialize an EasyIO board. |
| 1972 | */ |
| 1973 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 1974 | static int __init stl_initeio(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1976 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | unsigned int status; |
| 1978 | char *name; |
| 1979 | int rc; |
| 1980 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1981 | pr_debug("stl_initeio(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | |
| 1983 | brdp->ioctrl = brdp->ioaddr1 + 1; |
| 1984 | brdp->iostatus = brdp->ioaddr1 + 2; |
| 1985 | |
| 1986 | status = inb(brdp->iostatus); |
| 1987 | if ((status & EIO_IDBITMASK) == EIO_MK3) |
| 1988 | brdp->ioctrl++; |
| 1989 | |
| 1990 | /* |
| 1991 | * Handle board specific stuff now. The real difference is PCI |
| 1992 | * or not PCI. |
| 1993 | */ |
| 1994 | if (brdp->brdtype == BRD_EASYIOPCI) { |
| 1995 | brdp->iosize1 = 0x80; |
| 1996 | brdp->iosize2 = 0x80; |
| 1997 | name = "serial(EIO-PCI)"; |
| 1998 | outb(0x41, (brdp->ioaddr2 + 0x4c)); |
| 1999 | } else { |
| 2000 | brdp->iosize1 = 8; |
| 2001 | name = "serial(EIO)"; |
| 2002 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2003 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2004 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2005 | brdp->irq, brdp->brdnr); |
| 2006 | return(-EINVAL); |
| 2007 | } |
| 2008 | outb((stl_vecmap[brdp->irq] | EIO_0WS | |
| 2009 | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), |
| 2010 | brdp->ioctrl); |
| 2011 | } |
| 2012 | |
| 2013 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
| 2014 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
| 2015 | "%x conflicts with another device\n", brdp->brdnr, |
| 2016 | brdp->ioaddr1); |
| 2017 | return(-EBUSY); |
| 2018 | } |
| 2019 | |
| 2020 | if (brdp->iosize2 > 0) |
| 2021 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
| 2022 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
| 2023 | "address %x conflicts with another device\n", |
| 2024 | brdp->brdnr, brdp->ioaddr2); |
| 2025 | printk(KERN_WARNING "STALLION: Warning, also " |
| 2026 | "releasing board %d I/O address %x \n", |
| 2027 | brdp->brdnr, brdp->ioaddr1); |
| 2028 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2029 | return(-EBUSY); |
| 2030 | } |
| 2031 | |
| 2032 | /* |
| 2033 | * Everything looks OK, so let's go ahead and probe for the hardware. |
| 2034 | */ |
| 2035 | brdp->clk = CD1400_CLK; |
| 2036 | brdp->isr = stl_eiointr; |
| 2037 | |
| 2038 | switch (status & EIO_IDBITMASK) { |
| 2039 | case EIO_8PORTM: |
| 2040 | brdp->clk = CD1400_CLK8M; |
| 2041 | /* fall thru */ |
| 2042 | case EIO_8PORTRS: |
| 2043 | case EIO_8PORTDI: |
| 2044 | brdp->nrports = 8; |
| 2045 | break; |
| 2046 | case EIO_4PORTRS: |
| 2047 | brdp->nrports = 4; |
| 2048 | break; |
| 2049 | case EIO_MK3: |
| 2050 | switch (status & EIO_BRDMASK) { |
| 2051 | case ID_BRD4: |
| 2052 | brdp->nrports = 4; |
| 2053 | break; |
| 2054 | case ID_BRD8: |
| 2055 | brdp->nrports = 8; |
| 2056 | break; |
| 2057 | case ID_BRD16: |
| 2058 | brdp->nrports = 16; |
| 2059 | break; |
| 2060 | default: |
| 2061 | return(-ENODEV); |
| 2062 | } |
| 2063 | break; |
| 2064 | default: |
| 2065 | return(-ENODEV); |
| 2066 | } |
| 2067 | |
| 2068 | /* |
| 2069 | * We have verified that the board is actually present, so now we |
| 2070 | * can complete the setup. |
| 2071 | */ |
| 2072 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2073 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 2074 | if (!panelp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | printk(KERN_WARNING "STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2076 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 2077 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2078 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | |
| 2080 | panelp->magic = STL_PANELMAGIC; |
| 2081 | panelp->brdnr = brdp->brdnr; |
| 2082 | panelp->panelnr = 0; |
| 2083 | panelp->nrports = brdp->nrports; |
| 2084 | panelp->iobase = brdp->ioaddr1; |
| 2085 | panelp->hwid = status; |
| 2086 | if ((status & EIO_IDBITMASK) == EIO_MK3) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2087 | panelp->uartp = &stl_sc26198uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | panelp->isr = stl_sc26198intr; |
| 2089 | } else { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2090 | panelp->uartp = &stl_cd1400uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2091 | panelp->isr = stl_cd1400eiointr; |
| 2092 | } |
| 2093 | |
| 2094 | brdp->panels[0] = panelp; |
| 2095 | brdp->nrpanels = 1; |
| 2096 | brdp->state |= BRD_FOUND; |
| 2097 | brdp->hwid = status; |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 2098 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | printk("STALLION: failed to register interrupt " |
| 2100 | "routine for %s irq=%d\n", name, brdp->irq); |
| 2101 | rc = -ENODEV; |
| 2102 | } else { |
| 2103 | rc = 0; |
| 2104 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2105 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | } |
| 2107 | |
| 2108 | /*****************************************************************************/ |
| 2109 | |
| 2110 | /* |
| 2111 | * Try to find an ECH board and initialize it. This code is capable of |
| 2112 | * dealing with all types of ECH board. |
| 2113 | */ |
| 2114 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 2115 | static int __init stl_initech(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2117 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | unsigned int status, nxtid, ioaddr, conflict; |
| 2119 | int panelnr, banknr, i; |
| 2120 | char *name; |
| 2121 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2122 | pr_debug("stl_initech(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | |
| 2124 | status = 0; |
| 2125 | conflict = 0; |
| 2126 | |
| 2127 | /* |
| 2128 | * Set up the initial board register contents for boards. This varies a |
| 2129 | * bit between the different board types. So we need to handle each |
| 2130 | * separately. Also do a check that the supplied IRQ is good. |
| 2131 | */ |
| 2132 | switch (brdp->brdtype) { |
| 2133 | |
| 2134 | case BRD_ECH: |
| 2135 | brdp->isr = stl_echatintr; |
| 2136 | brdp->ioctrl = brdp->ioaddr1 + 1; |
| 2137 | brdp->iostatus = brdp->ioaddr1 + 1; |
| 2138 | status = inb(brdp->iostatus); |
| 2139 | if ((status & ECH_IDBITMASK) != ECH_ID) |
| 2140 | return(-ENODEV); |
| 2141 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2142 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2143 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2144 | brdp->irq, brdp->brdnr); |
| 2145 | return(-EINVAL); |
| 2146 | } |
| 2147 | status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); |
| 2148 | status |= (stl_vecmap[brdp->irq] << 1); |
| 2149 | outb((status | ECH_BRDRESET), brdp->ioaddr1); |
| 2150 | brdp->ioctrlval = ECH_INTENABLE | |
| 2151 | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); |
| 2152 | for (i = 0; (i < 10); i++) |
| 2153 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
| 2154 | brdp->iosize1 = 2; |
| 2155 | brdp->iosize2 = 32; |
| 2156 | name = "serial(EC8/32)"; |
| 2157 | outb(status, brdp->ioaddr1); |
| 2158 | break; |
| 2159 | |
| 2160 | case BRD_ECHMC: |
| 2161 | brdp->isr = stl_echmcaintr; |
| 2162 | brdp->ioctrl = brdp->ioaddr1 + 0x20; |
| 2163 | brdp->iostatus = brdp->ioctrl; |
| 2164 | status = inb(brdp->iostatus); |
| 2165 | if ((status & ECH_IDBITMASK) != ECH_ID) |
| 2166 | return(-ENODEV); |
| 2167 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2168 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2169 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2170 | brdp->irq, brdp->brdnr); |
| 2171 | return(-EINVAL); |
| 2172 | } |
| 2173 | outb(ECHMC_BRDRESET, brdp->ioctrl); |
| 2174 | outb(ECHMC_INTENABLE, brdp->ioctrl); |
| 2175 | brdp->iosize1 = 64; |
| 2176 | name = "serial(EC8/32-MC)"; |
| 2177 | break; |
| 2178 | |
| 2179 | case BRD_ECHPCI: |
| 2180 | brdp->isr = stl_echpciintr; |
| 2181 | brdp->ioctrl = brdp->ioaddr1 + 2; |
| 2182 | brdp->iosize1 = 4; |
| 2183 | brdp->iosize2 = 8; |
| 2184 | name = "serial(EC8/32-PCI)"; |
| 2185 | break; |
| 2186 | |
| 2187 | case BRD_ECH64PCI: |
| 2188 | brdp->isr = stl_echpci64intr; |
| 2189 | brdp->ioctrl = brdp->ioaddr2 + 0x40; |
| 2190 | outb(0x43, (brdp->ioaddr1 + 0x4c)); |
| 2191 | brdp->iosize1 = 0x80; |
| 2192 | brdp->iosize2 = 0x80; |
| 2193 | name = "serial(EC8/64-PCI)"; |
| 2194 | break; |
| 2195 | |
| 2196 | default: |
| 2197 | printk("STALLION: unknown board type=%d\n", brdp->brdtype); |
| 2198 | return(-EINVAL); |
| 2199 | break; |
| 2200 | } |
| 2201 | |
| 2202 | /* |
| 2203 | * Check boards for possible IO address conflicts and return fail status |
| 2204 | * if an IO conflict found. |
| 2205 | */ |
| 2206 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
| 2207 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
| 2208 | "%x conflicts with another device\n", brdp->brdnr, |
| 2209 | brdp->ioaddr1); |
| 2210 | return(-EBUSY); |
| 2211 | } |
| 2212 | |
| 2213 | if (brdp->iosize2 > 0) |
| 2214 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
| 2215 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
| 2216 | "address %x conflicts with another device\n", |
| 2217 | brdp->brdnr, brdp->ioaddr2); |
| 2218 | printk(KERN_WARNING "STALLION: Warning, also " |
| 2219 | "releasing board %d I/O address %x \n", |
| 2220 | brdp->brdnr, brdp->ioaddr1); |
| 2221 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2222 | return(-EBUSY); |
| 2223 | } |
| 2224 | |
| 2225 | /* |
| 2226 | * Scan through the secondary io address space looking for panels. |
| 2227 | * As we find'em allocate and initialize panel structures for each. |
| 2228 | */ |
| 2229 | brdp->clk = CD1400_CLK; |
| 2230 | brdp->hwid = status; |
| 2231 | |
| 2232 | ioaddr = brdp->ioaddr2; |
| 2233 | banknr = 0; |
| 2234 | panelnr = 0; |
| 2235 | nxtid = 0; |
| 2236 | |
| 2237 | for (i = 0; (i < STL_MAXPANELS); i++) { |
| 2238 | if (brdp->brdtype == BRD_ECHPCI) { |
| 2239 | outb(nxtid, brdp->ioctrl); |
| 2240 | ioaddr = brdp->ioaddr2; |
| 2241 | } |
| 2242 | status = inb(ioaddr + ECH_PNLSTATUS); |
| 2243 | if ((status & ECH_PNLIDMASK) != nxtid) |
| 2244 | break; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2245 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 2246 | if (!panelp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | printk("STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2248 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | break; |
| 2250 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | panelp->magic = STL_PANELMAGIC; |
| 2252 | panelp->brdnr = brdp->brdnr; |
| 2253 | panelp->panelnr = panelnr; |
| 2254 | panelp->iobase = ioaddr; |
| 2255 | panelp->pagenr = nxtid; |
| 2256 | panelp->hwid = status; |
| 2257 | brdp->bnk2panel[banknr] = panelp; |
| 2258 | brdp->bnkpageaddr[banknr] = nxtid; |
| 2259 | brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; |
| 2260 | |
| 2261 | if (status & ECH_PNLXPID) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2262 | panelp->uartp = &stl_sc26198uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | panelp->isr = stl_sc26198intr; |
| 2264 | if (status & ECH_PNL16PORT) { |
| 2265 | panelp->nrports = 16; |
| 2266 | brdp->bnk2panel[banknr] = panelp; |
| 2267 | brdp->bnkpageaddr[banknr] = nxtid; |
| 2268 | brdp->bnkstataddr[banknr++] = ioaddr + 4 + |
| 2269 | ECH_PNLSTATUS; |
| 2270 | } else { |
| 2271 | panelp->nrports = 8; |
| 2272 | } |
| 2273 | } else { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2274 | panelp->uartp = &stl_cd1400uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | panelp->isr = stl_cd1400echintr; |
| 2276 | if (status & ECH_PNL16PORT) { |
| 2277 | panelp->nrports = 16; |
| 2278 | panelp->ackmask = 0x80; |
| 2279 | if (brdp->brdtype != BRD_ECHPCI) |
| 2280 | ioaddr += EREG_BANKSIZE; |
| 2281 | brdp->bnk2panel[banknr] = panelp; |
| 2282 | brdp->bnkpageaddr[banknr] = ++nxtid; |
| 2283 | brdp->bnkstataddr[banknr++] = ioaddr + |
| 2284 | ECH_PNLSTATUS; |
| 2285 | } else { |
| 2286 | panelp->nrports = 8; |
| 2287 | panelp->ackmask = 0xc0; |
| 2288 | } |
| 2289 | } |
| 2290 | |
| 2291 | nxtid++; |
| 2292 | ioaddr += EREG_BANKSIZE; |
| 2293 | brdp->nrports += panelp->nrports; |
| 2294 | brdp->panels[panelnr++] = panelp; |
| 2295 | if ((brdp->brdtype != BRD_ECHPCI) && |
| 2296 | (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) |
| 2297 | break; |
| 2298 | } |
| 2299 | |
| 2300 | brdp->nrpanels = panelnr; |
| 2301 | brdp->nrbnks = banknr; |
| 2302 | if (brdp->brdtype == BRD_ECH) |
| 2303 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| 2304 | |
| 2305 | brdp->state |= BRD_FOUND; |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 2306 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | printk("STALLION: failed to register interrupt " |
| 2308 | "routine for %s irq=%d\n", name, brdp->irq); |
| 2309 | i = -ENODEV; |
| 2310 | } else { |
| 2311 | i = 0; |
| 2312 | } |
| 2313 | |
| 2314 | return(i); |
| 2315 | } |
| 2316 | |
| 2317 | /*****************************************************************************/ |
| 2318 | |
| 2319 | /* |
| 2320 | * Initialize and configure the specified board. |
| 2321 | * Scan through all the boards in the configuration and see what we |
| 2322 | * can find. Handle EIO and the ECH boards a little differently here |
| 2323 | * since the initial search and setup is very different. |
| 2324 | */ |
| 2325 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2326 | static int __init stl_brdinit(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | { |
| 2328 | int i; |
| 2329 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2330 | pr_debug("stl_brdinit(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | |
| 2332 | switch (brdp->brdtype) { |
| 2333 | case BRD_EASYIO: |
| 2334 | case BRD_EASYIOPCI: |
| 2335 | stl_initeio(brdp); |
| 2336 | break; |
| 2337 | case BRD_ECH: |
| 2338 | case BRD_ECHMC: |
| 2339 | case BRD_ECHPCI: |
| 2340 | case BRD_ECH64PCI: |
| 2341 | stl_initech(brdp); |
| 2342 | break; |
| 2343 | default: |
| 2344 | printk("STALLION: board=%d is unknown board type=%d\n", |
| 2345 | brdp->brdnr, brdp->brdtype); |
| 2346 | return(ENODEV); |
| 2347 | } |
| 2348 | |
| 2349 | stl_brds[brdp->brdnr] = brdp; |
| 2350 | if ((brdp->state & BRD_FOUND) == 0) { |
| 2351 | printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", |
| 2352 | stl_brdnames[brdp->brdtype], brdp->brdnr, |
| 2353 | brdp->ioaddr1, brdp->irq); |
| 2354 | return(ENODEV); |
| 2355 | } |
| 2356 | |
| 2357 | for (i = 0; (i < STL_MAXPANELS); i++) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2358 | if (brdp->panels[i] != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2359 | stl_initports(brdp, brdp->panels[i]); |
| 2360 | |
| 2361 | printk("STALLION: %s found, board=%d io=%x irq=%d " |
| 2362 | "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], |
| 2363 | brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, |
| 2364 | brdp->nrports); |
| 2365 | return(0); |
| 2366 | } |
| 2367 | |
| 2368 | /*****************************************************************************/ |
| 2369 | |
| 2370 | /* |
| 2371 | * Find the next available board number that is free. |
| 2372 | */ |
| 2373 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 2374 | static int __init stl_getbrdnr(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2375 | { |
| 2376 | int i; |
| 2377 | |
| 2378 | for (i = 0; (i < STL_MAXBRDS); i++) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2379 | if (stl_brds[i] == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | if (i >= stl_nrbrds) |
| 2381 | stl_nrbrds = i + 1; |
| 2382 | return(i); |
| 2383 | } |
| 2384 | } |
| 2385 | return(-1); |
| 2386 | } |
| 2387 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2388 | static void stl_cleanup_panels(struct stlbrd *brdp) |
| 2389 | { |
| 2390 | struct stlpanel *panelp; |
| 2391 | struct stlport *portp; |
| 2392 | unsigned int j, k; |
| 2393 | |
| 2394 | for (j = 0; j < STL_MAXPANELS; j++) { |
| 2395 | panelp = brdp->panels[j]; |
| 2396 | if (panelp == NULL) |
| 2397 | continue; |
| 2398 | for (k = 0; k < STL_PORTSPERPANEL; k++) { |
| 2399 | portp = panelp->ports[k]; |
| 2400 | if (portp == NULL) |
| 2401 | continue; |
| 2402 | if (portp->tty != NULL) |
| 2403 | stl_hangup(portp->tty); |
| 2404 | kfree(portp->tx.buf); |
| 2405 | kfree(portp); |
| 2406 | } |
| 2407 | kfree(panelp); |
| 2408 | } |
| 2409 | } |
| 2410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | /*****************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | /* |
| 2413 | * We have a Stallion board. Allocate a board structure and |
| 2414 | * initialize it. Read its IO and IRQ resources from PCI |
| 2415 | * configuration space. |
| 2416 | */ |
| 2417 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2418 | static int __devinit stl_pciprobe(struct pci_dev *pdev, |
| 2419 | const struct pci_device_id *ent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | { |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2421 | struct stlbrd *brdp; |
| 2422 | unsigned int brdtype = ent->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2423 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2424 | pr_debug("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2425 | pdev->bus->number, pdev->devfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2427 | if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) |
| 2428 | return -ENODEV; |
| 2429 | |
| 2430 | dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n", |
| 2431 | pdev->vendor, pdev->device, pdev->class); |
| 2432 | |
| 2433 | if (pci_enable_device(pdev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2434 | return(-EIO); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2435 | if ((brdp = stl_allocbrd()) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | return(-ENOMEM); |
| 2437 | if ((brdp->brdnr = stl_getbrdnr()) < 0) { |
| 2438 | printk("STALLION: too many boards found, " |
| 2439 | "maximum supported %d\n", STL_MAXBRDS); |
| 2440 | return(0); |
| 2441 | } |
| 2442 | brdp->brdtype = brdtype; |
| 2443 | |
| 2444 | /* |
| 2445 | * Different Stallion boards use the BAR registers in different ways, |
| 2446 | * so set up io addresses based on board type. |
| 2447 | */ |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2448 | pr_debug("%s(%d): BAR[]=%Lx,%Lx,%Lx,%Lx IRQ=%x\n", __FILE__, __LINE__, |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2449 | pci_resource_start(pdev, 0), pci_resource_start(pdev, 1), |
| 2450 | pci_resource_start(pdev, 2), pci_resource_start(pdev, 3), pdev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | |
| 2452 | /* |
| 2453 | * We have all resources from the board, so let's setup the actual |
| 2454 | * board structure now. |
| 2455 | */ |
| 2456 | switch (brdtype) { |
| 2457 | case BRD_ECHPCI: |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2458 | brdp->ioaddr2 = pci_resource_start(pdev, 0); |
| 2459 | brdp->ioaddr1 = pci_resource_start(pdev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | break; |
| 2461 | case BRD_ECH64PCI: |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2462 | brdp->ioaddr2 = pci_resource_start(pdev, 2); |
| 2463 | brdp->ioaddr1 = pci_resource_start(pdev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2464 | break; |
| 2465 | case BRD_EASYIOPCI: |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2466 | brdp->ioaddr1 = pci_resource_start(pdev, 2); |
| 2467 | brdp->ioaddr2 = pci_resource_start(pdev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | break; |
| 2469 | default: |
| 2470 | printk("STALLION: unknown PCI board type=%d\n", brdtype); |
| 2471 | break; |
| 2472 | } |
| 2473 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2474 | brdp->irq = pdev->irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | stl_brdinit(brdp); |
| 2476 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2477 | pci_set_drvdata(pdev, brdp); |
| 2478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | return(0); |
| 2480 | } |
| 2481 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2482 | static void __devexit stl_pciremove(struct pci_dev *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | { |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2484 | struct stlbrd *brdp = pci_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2486 | free_irq(brdp->irq, brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2488 | stl_cleanup_panels(brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2489 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2490 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2491 | if (brdp->iosize2 > 0) |
| 2492 | release_region(brdp->ioaddr2, brdp->iosize2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2493 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2494 | stl_brds[brdp->brdnr] = NULL; |
| 2495 | kfree(brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2496 | } |
| 2497 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 2498 | static struct pci_driver stl_pcidriver = { |
| 2499 | .name = "stallion", |
| 2500 | .id_table = stl_pcibrds, |
| 2501 | .probe = stl_pciprobe, |
| 2502 | .remove = __devexit_p(stl_pciremove) |
| 2503 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2504 | |
| 2505 | /*****************************************************************************/ |
| 2506 | |
| 2507 | /* |
| 2508 | * Scan through all the boards in the configuration and see what we |
| 2509 | * can find. Handle EIO and the ECH boards a little differently here |
| 2510 | * since the initial search and setup is too different. |
| 2511 | */ |
| 2512 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 2513 | static int __init stl_initbrds(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2515 | struct stlbrd *brdp; |
| 2516 | struct stlconf *confp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2517 | int i; |
| 2518 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2519 | pr_debug("stl_initbrds()\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2520 | |
| 2521 | if (stl_nrbrds > STL_MAXBRDS) { |
| 2522 | printk("STALLION: too many boards in configuration table, " |
| 2523 | "truncating to %d\n", STL_MAXBRDS); |
| 2524 | stl_nrbrds = STL_MAXBRDS; |
| 2525 | } |
| 2526 | |
| 2527 | /* |
| 2528 | * Firstly scan the list of static boards configured. Allocate |
| 2529 | * resources and initialize the boards as found. |
| 2530 | */ |
| 2531 | for (i = 0; (i < stl_nrbrds); i++) { |
| 2532 | confp = &stl_brdconf[i]; |
| 2533 | stl_parsebrd(confp, stl_brdsp[i]); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2534 | if ((brdp = stl_allocbrd()) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | return(-ENOMEM); |
| 2536 | brdp->brdnr = i; |
| 2537 | brdp->brdtype = confp->brdtype; |
| 2538 | brdp->ioaddr1 = confp->ioaddr1; |
| 2539 | brdp->ioaddr2 = confp->ioaddr2; |
| 2540 | brdp->irq = confp->irq; |
| 2541 | brdp->irqtype = confp->irqtype; |
| 2542 | stl_brdinit(brdp); |
| 2543 | } |
| 2544 | |
| 2545 | /* |
| 2546 | * Find any dynamically supported boards. That is via module load |
| 2547 | * line options or auto-detected on the PCI bus. |
| 2548 | */ |
| 2549 | stl_argbrds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2550 | |
| 2551 | return(0); |
| 2552 | } |
| 2553 | |
| 2554 | /*****************************************************************************/ |
| 2555 | |
| 2556 | /* |
| 2557 | * Return the board stats structure to user app. |
| 2558 | */ |
| 2559 | |
| 2560 | static int stl_getbrdstats(combrd_t __user *bp) |
| 2561 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2562 | struct stlbrd *brdp; |
| 2563 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2564 | int i; |
| 2565 | |
| 2566 | if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) |
| 2567 | return -EFAULT; |
| 2568 | if (stl_brdstats.brd >= STL_MAXBRDS) |
| 2569 | return(-ENODEV); |
| 2570 | brdp = stl_brds[stl_brdstats.brd]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2571 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2572 | return(-ENODEV); |
| 2573 | |
| 2574 | memset(&stl_brdstats, 0, sizeof(combrd_t)); |
| 2575 | stl_brdstats.brd = brdp->brdnr; |
| 2576 | stl_brdstats.type = brdp->brdtype; |
| 2577 | stl_brdstats.hwid = brdp->hwid; |
| 2578 | stl_brdstats.state = brdp->state; |
| 2579 | stl_brdstats.ioaddr = brdp->ioaddr1; |
| 2580 | stl_brdstats.ioaddr2 = brdp->ioaddr2; |
| 2581 | stl_brdstats.irq = brdp->irq; |
| 2582 | stl_brdstats.nrpanels = brdp->nrpanels; |
| 2583 | stl_brdstats.nrports = brdp->nrports; |
| 2584 | for (i = 0; (i < brdp->nrpanels); i++) { |
| 2585 | panelp = brdp->panels[i]; |
| 2586 | stl_brdstats.panels[i].panel = i; |
| 2587 | stl_brdstats.panels[i].hwid = panelp->hwid; |
| 2588 | stl_brdstats.panels[i].nrports = panelp->nrports; |
| 2589 | } |
| 2590 | |
| 2591 | return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; |
| 2592 | } |
| 2593 | |
| 2594 | /*****************************************************************************/ |
| 2595 | |
| 2596 | /* |
| 2597 | * Resolve the referenced port number into a port struct pointer. |
| 2598 | */ |
| 2599 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2600 | static struct stlport *stl_getport(int brdnr, int panelnr, int portnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2602 | struct stlbrd *brdp; |
| 2603 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | |
| 2605 | if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2606 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2607 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2608 | if (brdp == NULL) |
| 2609 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2611 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2612 | panelp = brdp->panels[panelnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2613 | if (panelp == NULL) |
| 2614 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2615 | if ((portnr < 0) || (portnr >= panelp->nrports)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2616 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | return(panelp->ports[portnr]); |
| 2618 | } |
| 2619 | |
| 2620 | /*****************************************************************************/ |
| 2621 | |
| 2622 | /* |
| 2623 | * Return the port stats structure to user app. A NULL port struct |
| 2624 | * pointer passed in means that we need to find out from the app |
| 2625 | * what port to get stats for (used through board control device). |
| 2626 | */ |
| 2627 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2628 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2629 | { |
| 2630 | unsigned char *head, *tail; |
| 2631 | unsigned long flags; |
| 2632 | |
| 2633 | if (!portp) { |
| 2634 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| 2635 | return -EFAULT; |
| 2636 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| 2637 | stl_comstats.port); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2638 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2639 | return(-ENODEV); |
| 2640 | } |
| 2641 | |
| 2642 | portp->stats.state = portp->istate; |
| 2643 | portp->stats.flags = portp->flags; |
| 2644 | portp->stats.hwid = portp->hwid; |
| 2645 | |
| 2646 | portp->stats.ttystate = 0; |
| 2647 | portp->stats.cflags = 0; |
| 2648 | portp->stats.iflags = 0; |
| 2649 | portp->stats.oflags = 0; |
| 2650 | portp->stats.lflags = 0; |
| 2651 | portp->stats.rxbuffered = 0; |
| 2652 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2653 | spin_lock_irqsave(&stallion_lock, flags); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2654 | if (portp->tty != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2655 | if (portp->tty->driver_data == portp) { |
| 2656 | portp->stats.ttystate = portp->tty->flags; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2657 | /* No longer available as a statistic */ |
| 2658 | portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */ |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2659 | if (portp->tty->termios != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2660 | portp->stats.cflags = portp->tty->termios->c_cflag; |
| 2661 | portp->stats.iflags = portp->tty->termios->c_iflag; |
| 2662 | portp->stats.oflags = portp->tty->termios->c_oflag; |
| 2663 | portp->stats.lflags = portp->tty->termios->c_lflag; |
| 2664 | } |
| 2665 | } |
| 2666 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2667 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2668 | |
| 2669 | head = portp->tx.head; |
| 2670 | tail = portp->tx.tail; |
| 2671 | portp->stats.txbuffered = ((head >= tail) ? (head - tail) : |
| 2672 | (STL_TXBUFSIZE - (tail - head))); |
| 2673 | |
| 2674 | portp->stats.signals = (unsigned long) stl_getsignals(portp); |
| 2675 | |
| 2676 | return copy_to_user(cp, &portp->stats, |
| 2677 | sizeof(comstats_t)) ? -EFAULT : 0; |
| 2678 | } |
| 2679 | |
| 2680 | /*****************************************************************************/ |
| 2681 | |
| 2682 | /* |
| 2683 | * Clear the port stats structure. We also return it zeroed out... |
| 2684 | */ |
| 2685 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2686 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2687 | { |
| 2688 | if (!portp) { |
| 2689 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| 2690 | return -EFAULT; |
| 2691 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| 2692 | stl_comstats.port); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2693 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | return(-ENODEV); |
| 2695 | } |
| 2696 | |
| 2697 | memset(&portp->stats, 0, sizeof(comstats_t)); |
| 2698 | portp->stats.brd = portp->brdnr; |
| 2699 | portp->stats.panel = portp->panelnr; |
| 2700 | portp->stats.port = portp->portnr; |
| 2701 | return copy_to_user(cp, &portp->stats, |
| 2702 | sizeof(comstats_t)) ? -EFAULT : 0; |
| 2703 | } |
| 2704 | |
| 2705 | /*****************************************************************************/ |
| 2706 | |
| 2707 | /* |
| 2708 | * Return the entire driver ports structure to a user app. |
| 2709 | */ |
| 2710 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2711 | static int stl_getportstruct(struct stlport __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2713 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2714 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2715 | if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2716 | return -EFAULT; |
| 2717 | portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, |
| 2718 | stl_dummyport.portnr); |
| 2719 | if (!portp) |
| 2720 | return -ENODEV; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2721 | return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2722 | } |
| 2723 | |
| 2724 | /*****************************************************************************/ |
| 2725 | |
| 2726 | /* |
| 2727 | * Return the entire driver board structure to a user app. |
| 2728 | */ |
| 2729 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2730 | static int stl_getbrdstruct(struct stlbrd __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2732 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2734 | if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2735 | return -EFAULT; |
| 2736 | if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) |
| 2737 | return -ENODEV; |
| 2738 | brdp = stl_brds[stl_dummybrd.brdnr]; |
| 2739 | if (!brdp) |
| 2740 | return(-ENODEV); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2741 | return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2742 | } |
| 2743 | |
| 2744 | /*****************************************************************************/ |
| 2745 | |
| 2746 | /* |
| 2747 | * The "staliomem" device is also required to do some special operations |
| 2748 | * on the board and/or ports. In this driver it is mostly used for stats |
| 2749 | * collection. |
| 2750 | */ |
| 2751 | |
| 2752 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) |
| 2753 | { |
| 2754 | int brdnr, rc; |
| 2755 | void __user *argp = (void __user *)arg; |
| 2756 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2757 | 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] | 2758 | |
| 2759 | brdnr = iminor(ip); |
| 2760 | if (brdnr >= STL_MAXBRDS) |
| 2761 | return(-ENODEV); |
| 2762 | rc = 0; |
| 2763 | |
| 2764 | switch (cmd) { |
| 2765 | case COM_GETPORTSTATS: |
| 2766 | rc = stl_getportstats(NULL, argp); |
| 2767 | break; |
| 2768 | case COM_CLRPORTSTATS: |
| 2769 | rc = stl_clrportstats(NULL, argp); |
| 2770 | break; |
| 2771 | case COM_GETBRDSTATS: |
| 2772 | rc = stl_getbrdstats(argp); |
| 2773 | break; |
| 2774 | case COM_READPORT: |
| 2775 | rc = stl_getportstruct(argp); |
| 2776 | break; |
| 2777 | case COM_READBOARD: |
| 2778 | rc = stl_getbrdstruct(argp); |
| 2779 | break; |
| 2780 | default: |
| 2781 | rc = -ENOIOCTLCMD; |
| 2782 | break; |
| 2783 | } |
| 2784 | |
| 2785 | return(rc); |
| 2786 | } |
| 2787 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2788 | static const struct tty_operations stl_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2789 | .open = stl_open, |
| 2790 | .close = stl_close, |
| 2791 | .write = stl_write, |
| 2792 | .put_char = stl_putchar, |
| 2793 | .flush_chars = stl_flushchars, |
| 2794 | .write_room = stl_writeroom, |
| 2795 | .chars_in_buffer = stl_charsinbuffer, |
| 2796 | .ioctl = stl_ioctl, |
| 2797 | .set_termios = stl_settermios, |
| 2798 | .throttle = stl_throttle, |
| 2799 | .unthrottle = stl_unthrottle, |
| 2800 | .stop = stl_stop, |
| 2801 | .start = stl_start, |
| 2802 | .hangup = stl_hangup, |
| 2803 | .flush_buffer = stl_flushbuffer, |
| 2804 | .break_ctl = stl_breakctl, |
| 2805 | .wait_until_sent = stl_waituntilsent, |
| 2806 | .send_xchar = stl_sendxchar, |
| 2807 | .read_proc = stl_readproc, |
| 2808 | .tiocmget = stl_tiocmget, |
| 2809 | .tiocmset = stl_tiocmset, |
| 2810 | }; |
| 2811 | |
| 2812 | /*****************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2813 | /* CD1400 HARDWARE FUNCTIONS */ |
| 2814 | /*****************************************************************************/ |
| 2815 | |
| 2816 | /* |
| 2817 | * These functions get/set/update the registers of the cd1400 UARTs. |
| 2818 | * Access to the cd1400 registers is via an address/data io port pair. |
| 2819 | * (Maybe should make this inline...) |
| 2820 | */ |
| 2821 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2822 | static int stl_cd1400getreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2823 | { |
| 2824 | outb((regnr + portp->uartaddr), portp->ioaddr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2825 | return inb(portp->ioaddr + EREG_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | } |
| 2827 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2828 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2829 | { |
| 2830 | outb((regnr + portp->uartaddr), portp->ioaddr); |
| 2831 | outb(value, portp->ioaddr + EREG_DATA); |
| 2832 | } |
| 2833 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2834 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2835 | { |
| 2836 | outb((regnr + portp->uartaddr), portp->ioaddr); |
| 2837 | if (inb(portp->ioaddr + EREG_DATA) != value) { |
| 2838 | outb(value, portp->ioaddr + EREG_DATA); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2839 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2840 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2841 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2842 | } |
| 2843 | |
| 2844 | /*****************************************************************************/ |
| 2845 | |
| 2846 | /* |
| 2847 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
| 2848 | * these ports are on - since the port io registers are almost |
| 2849 | * identical when dealing with ports. |
| 2850 | */ |
| 2851 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2852 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2853 | { |
| 2854 | unsigned int gfrcr; |
| 2855 | int chipmask, i, j; |
| 2856 | int nrchips, uartaddr, ioaddr; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2857 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2858 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2859 | pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2860 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2861 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2862 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
| 2863 | |
| 2864 | /* |
| 2865 | * Check that each chip is present and started up OK. |
| 2866 | */ |
| 2867 | chipmask = 0; |
| 2868 | nrchips = panelp->nrports / CD1400_PORTS; |
| 2869 | for (i = 0; (i < nrchips); i++) { |
| 2870 | if (brdp->brdtype == BRD_ECHPCI) { |
| 2871 | outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); |
| 2872 | ioaddr = panelp->iobase; |
| 2873 | } else { |
| 2874 | ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); |
| 2875 | } |
| 2876 | uartaddr = (i & 0x01) ? 0x080 : 0; |
| 2877 | outb((GFRCR + uartaddr), ioaddr); |
| 2878 | outb(0, (ioaddr + EREG_DATA)); |
| 2879 | outb((CCR + uartaddr), ioaddr); |
| 2880 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| 2881 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| 2882 | outb((GFRCR + uartaddr), ioaddr); |
| 2883 | for (j = 0; (j < CCR_MAXWAIT); j++) { |
| 2884 | if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) |
| 2885 | break; |
| 2886 | } |
| 2887 | if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { |
| 2888 | printk("STALLION: cd1400 not responding, " |
| 2889 | "brd=%d panel=%d chip=%d\n", |
| 2890 | panelp->brdnr, panelp->panelnr, i); |
| 2891 | continue; |
| 2892 | } |
| 2893 | chipmask |= (0x1 << i); |
| 2894 | outb((PPR + uartaddr), ioaddr); |
| 2895 | outb(PPR_SCALAR, (ioaddr + EREG_DATA)); |
| 2896 | } |
| 2897 | |
| 2898 | BRDDISABLE(panelp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2899 | spin_unlock_irqrestore(&brd_lock, flags); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2900 | return chipmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2901 | } |
| 2902 | |
| 2903 | /*****************************************************************************/ |
| 2904 | |
| 2905 | /* |
| 2906 | * Initialize hardware specific port registers. |
| 2907 | */ |
| 2908 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2909 | 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] | 2910 | { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2911 | unsigned long flags; |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2912 | pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
| 2913 | panelp, portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2914 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2915 | if ((brdp == NULL) || (panelp == NULL) || |
| 2916 | (portp == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2917 | return; |
| 2918 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2919 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2920 | portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
| 2921 | (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); |
| 2922 | portp->uartaddr = (portp->portnr & 0x04) << 5; |
| 2923 | portp->pagenr = panelp->pagenr + (portp->portnr >> 3); |
| 2924 | |
| 2925 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 2926 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 2927 | stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); |
| 2928 | portp->hwid = stl_cd1400getreg(portp, GFRCR); |
| 2929 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2930 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2931 | } |
| 2932 | |
| 2933 | /*****************************************************************************/ |
| 2934 | |
| 2935 | /* |
| 2936 | * Wait for the command register to be ready. We will poll this, |
| 2937 | * since it won't usually take too long to be ready. |
| 2938 | */ |
| 2939 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2940 | static void stl_cd1400ccrwait(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2941 | { |
| 2942 | int i; |
| 2943 | |
| 2944 | for (i = 0; (i < CCR_MAXWAIT); i++) { |
| 2945 | if (stl_cd1400getreg(portp, CCR) == 0) { |
| 2946 | return; |
| 2947 | } |
| 2948 | } |
| 2949 | |
| 2950 | printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", |
| 2951 | portp->portnr, portp->panelnr, portp->brdnr); |
| 2952 | } |
| 2953 | |
| 2954 | /*****************************************************************************/ |
| 2955 | |
| 2956 | /* |
| 2957 | * Set up the cd1400 registers for a port based on the termios port |
| 2958 | * settings. |
| 2959 | */ |
| 2960 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2961 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2963 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2964 | unsigned long flags; |
| 2965 | unsigned int clkdiv, baudrate; |
| 2966 | unsigned char cor1, cor2, cor3; |
| 2967 | unsigned char cor4, cor5, ccr; |
| 2968 | unsigned char srer, sreron, sreroff; |
| 2969 | unsigned char mcor1, mcor2, rtpr; |
| 2970 | unsigned char clk, div; |
| 2971 | |
| 2972 | cor1 = 0; |
| 2973 | cor2 = 0; |
| 2974 | cor3 = 0; |
| 2975 | cor4 = 0; |
| 2976 | cor5 = 0; |
| 2977 | ccr = 0; |
| 2978 | rtpr = 0; |
| 2979 | clk = 0; |
| 2980 | div = 0; |
| 2981 | mcor1 = 0; |
| 2982 | mcor2 = 0; |
| 2983 | sreron = 0; |
| 2984 | sreroff = 0; |
| 2985 | |
| 2986 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2987 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2988 | return; |
| 2989 | |
| 2990 | /* |
| 2991 | * Set up the RX char ignore mask with those RX error types we |
| 2992 | * can ignore. We can get the cd1400 to help us out a little here, |
| 2993 | * it will ignore parity errors and breaks for us. |
| 2994 | */ |
| 2995 | portp->rxignoremsk = 0; |
| 2996 | if (tiosp->c_iflag & IGNPAR) { |
| 2997 | portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); |
| 2998 | cor1 |= COR1_PARIGNORE; |
| 2999 | } |
| 3000 | if (tiosp->c_iflag & IGNBRK) { |
| 3001 | portp->rxignoremsk |= ST_BREAK; |
| 3002 | cor4 |= COR4_IGNBRK; |
| 3003 | } |
| 3004 | |
| 3005 | portp->rxmarkmsk = ST_OVERRUN; |
| 3006 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
| 3007 | portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); |
| 3008 | if (tiosp->c_iflag & BRKINT) |
| 3009 | portp->rxmarkmsk |= ST_BREAK; |
| 3010 | |
| 3011 | /* |
| 3012 | * Go through the char size, parity and stop bits and set all the |
| 3013 | * option register appropriately. |
| 3014 | */ |
| 3015 | switch (tiosp->c_cflag & CSIZE) { |
| 3016 | case CS5: |
| 3017 | cor1 |= COR1_CHL5; |
| 3018 | break; |
| 3019 | case CS6: |
| 3020 | cor1 |= COR1_CHL6; |
| 3021 | break; |
| 3022 | case CS7: |
| 3023 | cor1 |= COR1_CHL7; |
| 3024 | break; |
| 3025 | default: |
| 3026 | cor1 |= COR1_CHL8; |
| 3027 | break; |
| 3028 | } |
| 3029 | |
| 3030 | if (tiosp->c_cflag & CSTOPB) |
| 3031 | cor1 |= COR1_STOP2; |
| 3032 | else |
| 3033 | cor1 |= COR1_STOP1; |
| 3034 | |
| 3035 | if (tiosp->c_cflag & PARENB) { |
| 3036 | if (tiosp->c_cflag & PARODD) |
| 3037 | cor1 |= (COR1_PARENB | COR1_PARODD); |
| 3038 | else |
| 3039 | cor1 |= (COR1_PARENB | COR1_PAREVEN); |
| 3040 | } else { |
| 3041 | cor1 |= COR1_PARNONE; |
| 3042 | } |
| 3043 | |
| 3044 | /* |
| 3045 | * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing |
| 3046 | * space for hardware flow control and the like. This should be set to |
| 3047 | * VMIN. Also here we will set the RX data timeout to 10ms - this should |
| 3048 | * really be based on VTIME. |
| 3049 | */ |
| 3050 | cor3 |= FIFO_RXTHRESHOLD; |
| 3051 | rtpr = 2; |
| 3052 | |
| 3053 | /* |
| 3054 | * Calculate the baud rate timers. For now we will just assume that |
| 3055 | * the input and output baud are the same. Could have used a baud |
| 3056 | * table here, but this way we can generate virtually any baud rate |
| 3057 | * we like! |
| 3058 | */ |
| 3059 | baudrate = tiosp->c_cflag & CBAUD; |
| 3060 | if (baudrate & CBAUDEX) { |
| 3061 | baudrate &= ~CBAUDEX; |
| 3062 | if ((baudrate < 1) || (baudrate > 4)) |
| 3063 | tiosp->c_cflag &= ~CBAUDEX; |
| 3064 | else |
| 3065 | baudrate += 15; |
| 3066 | } |
| 3067 | baudrate = stl_baudrates[baudrate]; |
| 3068 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
| 3069 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 3070 | baudrate = 57600; |
| 3071 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 3072 | baudrate = 115200; |
| 3073 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 3074 | baudrate = 230400; |
| 3075 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 3076 | baudrate = 460800; |
| 3077 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| 3078 | baudrate = (portp->baud_base / portp->custom_divisor); |
| 3079 | } |
| 3080 | if (baudrate > STL_CD1400MAXBAUD) |
| 3081 | baudrate = STL_CD1400MAXBAUD; |
| 3082 | |
| 3083 | if (baudrate > 0) { |
| 3084 | for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { |
| 3085 | clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); |
| 3086 | if (clkdiv < 0x100) |
| 3087 | break; |
| 3088 | } |
| 3089 | div = (unsigned char) clkdiv; |
| 3090 | } |
| 3091 | |
| 3092 | /* |
| 3093 | * Check what form of modem signaling is required and set it up. |
| 3094 | */ |
| 3095 | if ((tiosp->c_cflag & CLOCAL) == 0) { |
| 3096 | mcor1 |= MCOR1_DCD; |
| 3097 | mcor2 |= MCOR2_DCD; |
| 3098 | sreron |= SRER_MODEM; |
| 3099 | portp->flags |= ASYNC_CHECK_CD; |
| 3100 | } else { |
| 3101 | portp->flags &= ~ASYNC_CHECK_CD; |
| 3102 | } |
| 3103 | |
| 3104 | /* |
| 3105 | * Setup cd1400 enhanced modes if we can. In particular we want to |
| 3106 | * handle as much of the flow control as possible automatically. As |
| 3107 | * well as saving a few CPU cycles it will also greatly improve flow |
| 3108 | * control reliability. |
| 3109 | */ |
| 3110 | if (tiosp->c_iflag & IXON) { |
| 3111 | cor2 |= COR2_TXIBE; |
| 3112 | cor3 |= COR3_SCD12; |
| 3113 | if (tiosp->c_iflag & IXANY) |
| 3114 | cor2 |= COR2_IXM; |
| 3115 | } |
| 3116 | |
| 3117 | if (tiosp->c_cflag & CRTSCTS) { |
| 3118 | cor2 |= COR2_CTSAE; |
| 3119 | mcor1 |= FIFO_RTSTHRESHOLD; |
| 3120 | } |
| 3121 | |
| 3122 | /* |
| 3123 | * All cd1400 register values calculated so go through and set |
| 3124 | * them all up. |
| 3125 | */ |
| 3126 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3127 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3128 | portp->portnr, portp->panelnr, portp->brdnr); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3129 | 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] | 3130 | cor1, cor2, cor3, cor4, cor5); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3131 | 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] | 3132 | mcor1, mcor2, rtpr, sreron, sreroff); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3133 | pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); |
| 3134 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3135 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| 3136 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3137 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3138 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3139 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3140 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); |
| 3141 | srer = stl_cd1400getreg(portp, SRER); |
| 3142 | stl_cd1400setreg(portp, SRER, 0); |
| 3143 | if (stl_cd1400updatereg(portp, COR1, cor1)) |
| 3144 | ccr = 1; |
| 3145 | if (stl_cd1400updatereg(portp, COR2, cor2)) |
| 3146 | ccr = 1; |
| 3147 | if (stl_cd1400updatereg(portp, COR3, cor3)) |
| 3148 | ccr = 1; |
| 3149 | if (ccr) { |
| 3150 | stl_cd1400ccrwait(portp); |
| 3151 | stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); |
| 3152 | } |
| 3153 | stl_cd1400setreg(portp, COR4, cor4); |
| 3154 | stl_cd1400setreg(portp, COR5, cor5); |
| 3155 | stl_cd1400setreg(portp, MCOR1, mcor1); |
| 3156 | stl_cd1400setreg(portp, MCOR2, mcor2); |
| 3157 | if (baudrate > 0) { |
| 3158 | stl_cd1400setreg(portp, TCOR, clk); |
| 3159 | stl_cd1400setreg(portp, TBPR, div); |
| 3160 | stl_cd1400setreg(portp, RCOR, clk); |
| 3161 | stl_cd1400setreg(portp, RBPR, div); |
| 3162 | } |
| 3163 | stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); |
| 3164 | stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); |
| 3165 | stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); |
| 3166 | stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); |
| 3167 | stl_cd1400setreg(portp, RTPR, rtpr); |
| 3168 | mcor1 = stl_cd1400getreg(portp, MSVR1); |
| 3169 | if (mcor1 & MSVR1_DCD) |
| 3170 | portp->sigs |= TIOCM_CD; |
| 3171 | else |
| 3172 | portp->sigs &= ~TIOCM_CD; |
| 3173 | stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); |
| 3174 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3175 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3176 | } |
| 3177 | |
| 3178 | /*****************************************************************************/ |
| 3179 | |
| 3180 | /* |
| 3181 | * Set the state of the DTR and RTS signals. |
| 3182 | */ |
| 3183 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3184 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3185 | { |
| 3186 | unsigned char msvr1, msvr2; |
| 3187 | unsigned long flags; |
| 3188 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3189 | pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n", |
| 3190 | portp, dtr, rts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | |
| 3192 | msvr1 = 0; |
| 3193 | msvr2 = 0; |
| 3194 | if (dtr > 0) |
| 3195 | msvr1 = MSVR1_DTR; |
| 3196 | if (rts > 0) |
| 3197 | msvr2 = MSVR2_RTS; |
| 3198 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3199 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3200 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3201 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3202 | if (rts >= 0) |
| 3203 | stl_cd1400setreg(portp, MSVR2, msvr2); |
| 3204 | if (dtr >= 0) |
| 3205 | stl_cd1400setreg(portp, MSVR1, msvr1); |
| 3206 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3207 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3208 | } |
| 3209 | |
| 3210 | /*****************************************************************************/ |
| 3211 | |
| 3212 | /* |
| 3213 | * Return the state of the signals. |
| 3214 | */ |
| 3215 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3216 | static int stl_cd1400getsignals(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3217 | { |
| 3218 | unsigned char msvr1, msvr2; |
| 3219 | unsigned long flags; |
| 3220 | int sigs; |
| 3221 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3222 | pr_debug("stl_cd1400getsignals(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3223 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3224 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3225 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3226 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3227 | msvr1 = stl_cd1400getreg(portp, MSVR1); |
| 3228 | msvr2 = stl_cd1400getreg(portp, MSVR2); |
| 3229 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3230 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3231 | |
| 3232 | sigs = 0; |
| 3233 | sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; |
| 3234 | sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; |
| 3235 | sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; |
| 3236 | sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; |
| 3237 | #if 0 |
| 3238 | sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; |
| 3239 | sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; |
| 3240 | #else |
| 3241 | sigs |= TIOCM_DSR; |
| 3242 | #endif |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3243 | return sigs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3244 | } |
| 3245 | |
| 3246 | /*****************************************************************************/ |
| 3247 | |
| 3248 | /* |
| 3249 | * Enable/Disable the Transmitter and/or Receiver. |
| 3250 | */ |
| 3251 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3252 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3253 | { |
| 3254 | unsigned char ccr; |
| 3255 | unsigned long flags; |
| 3256 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3257 | pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
| 3258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3259 | ccr = 0; |
| 3260 | |
| 3261 | if (tx == 0) |
| 3262 | ccr |= CCR_TXDISABLE; |
| 3263 | else if (tx > 0) |
| 3264 | ccr |= CCR_TXENABLE; |
| 3265 | if (rx == 0) |
| 3266 | ccr |= CCR_RXDISABLE; |
| 3267 | else if (rx > 0) |
| 3268 | ccr |= CCR_RXENABLE; |
| 3269 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3270 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3271 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3272 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3273 | stl_cd1400ccrwait(portp); |
| 3274 | stl_cd1400setreg(portp, CCR, ccr); |
| 3275 | stl_cd1400ccrwait(portp); |
| 3276 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3277 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3278 | } |
| 3279 | |
| 3280 | /*****************************************************************************/ |
| 3281 | |
| 3282 | /* |
| 3283 | * Start/stop the Transmitter and/or Receiver. |
| 3284 | */ |
| 3285 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3286 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3287 | { |
| 3288 | unsigned char sreron, sreroff; |
| 3289 | unsigned long flags; |
| 3290 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3291 | 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] | 3292 | |
| 3293 | sreron = 0; |
| 3294 | sreroff = 0; |
| 3295 | if (tx == 0) |
| 3296 | sreroff |= (SRER_TXDATA | SRER_TXEMPTY); |
| 3297 | else if (tx == 1) |
| 3298 | sreron |= SRER_TXDATA; |
| 3299 | else if (tx >= 2) |
| 3300 | sreron |= SRER_TXEMPTY; |
| 3301 | if (rx == 0) |
| 3302 | sreroff |= SRER_RXDATA; |
| 3303 | else if (rx > 0) |
| 3304 | sreron |= SRER_RXDATA; |
| 3305 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3306 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3307 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3308 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3309 | stl_cd1400setreg(portp, SRER, |
| 3310 | ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); |
| 3311 | BRDDISABLE(portp->brdnr); |
| 3312 | if (tx > 0) |
| 3313 | set_bit(ASYI_TXBUSY, &portp->istate); |
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 | * Disable all interrupts from this port. |
| 3321 | */ |
| 3322 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3323 | static void stl_cd1400disableintrs(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3324 | { |
| 3325 | unsigned long flags; |
| 3326 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3327 | pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp); |
| 3328 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3329 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3330 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3331 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3332 | stl_cd1400setreg(portp, SRER, 0); |
| 3333 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3334 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3335 | } |
| 3336 | |
| 3337 | /*****************************************************************************/ |
| 3338 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3339 | static void stl_cd1400sendbreak(struct stlport *portp, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3340 | { |
| 3341 | unsigned long flags; |
| 3342 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3343 | pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3344 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3345 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3346 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3347 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3348 | stl_cd1400setreg(portp, SRER, |
| 3349 | ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | |
| 3350 | SRER_TXEMPTY)); |
| 3351 | BRDDISABLE(portp->brdnr); |
| 3352 | portp->brklen = len; |
| 3353 | if (len == 1) |
| 3354 | portp->stats.txbreaks++; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3355 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3356 | } |
| 3357 | |
| 3358 | /*****************************************************************************/ |
| 3359 | |
| 3360 | /* |
| 3361 | * Take flow control actions... |
| 3362 | */ |
| 3363 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3364 | static void stl_cd1400flowctrl(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3365 | { |
| 3366 | struct tty_struct *tty; |
| 3367 | unsigned long flags; |
| 3368 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3369 | pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3370 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3371 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3372 | return; |
| 3373 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3374 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3375 | return; |
| 3376 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3377 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3378 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3379 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3380 | |
| 3381 | if (state) { |
| 3382 | if (tty->termios->c_iflag & IXOFF) { |
| 3383 | stl_cd1400ccrwait(portp); |
| 3384 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| 3385 | portp->stats.rxxon++; |
| 3386 | stl_cd1400ccrwait(portp); |
| 3387 | } |
| 3388 | /* |
| 3389 | * Question: should we return RTS to what it was before? It may |
| 3390 | * have been set by an ioctl... Suppose not, since if you have |
| 3391 | * hardware flow control set then it is pretty silly to go and |
| 3392 | * set the RTS line by hand. |
| 3393 | */ |
| 3394 | if (tty->termios->c_cflag & CRTSCTS) { |
| 3395 | stl_cd1400setreg(portp, MCOR1, |
| 3396 | (stl_cd1400getreg(portp, MCOR1) | |
| 3397 | FIFO_RTSTHRESHOLD)); |
| 3398 | stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); |
| 3399 | portp->stats.rxrtson++; |
| 3400 | } |
| 3401 | } else { |
| 3402 | if (tty->termios->c_iflag & IXOFF) { |
| 3403 | stl_cd1400ccrwait(portp); |
| 3404 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| 3405 | portp->stats.rxxoff++; |
| 3406 | stl_cd1400ccrwait(portp); |
| 3407 | } |
| 3408 | if (tty->termios->c_cflag & CRTSCTS) { |
| 3409 | stl_cd1400setreg(portp, MCOR1, |
| 3410 | (stl_cd1400getreg(portp, MCOR1) & 0xf0)); |
| 3411 | stl_cd1400setreg(portp, MSVR2, 0); |
| 3412 | portp->stats.rxrtsoff++; |
| 3413 | } |
| 3414 | } |
| 3415 | |
| 3416 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3417 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | } |
| 3419 | |
| 3420 | /*****************************************************************************/ |
| 3421 | |
| 3422 | /* |
| 3423 | * Send a flow control character... |
| 3424 | */ |
| 3425 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3426 | static void stl_cd1400sendflow(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3427 | { |
| 3428 | struct tty_struct *tty; |
| 3429 | unsigned long flags; |
| 3430 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3431 | pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3432 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3433 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3434 | return; |
| 3435 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3436 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3437 | return; |
| 3438 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3439 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3440 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3441 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3442 | if (state) { |
| 3443 | stl_cd1400ccrwait(portp); |
| 3444 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| 3445 | portp->stats.rxxon++; |
| 3446 | stl_cd1400ccrwait(portp); |
| 3447 | } else { |
| 3448 | stl_cd1400ccrwait(portp); |
| 3449 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| 3450 | portp->stats.rxxoff++; |
| 3451 | stl_cd1400ccrwait(portp); |
| 3452 | } |
| 3453 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3454 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3455 | } |
| 3456 | |
| 3457 | /*****************************************************************************/ |
| 3458 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3459 | static void stl_cd1400flush(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3460 | { |
| 3461 | unsigned long flags; |
| 3462 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3463 | pr_debug("stl_cd1400flush(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3464 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3465 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3466 | return; |
| 3467 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3468 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3469 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3470 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3471 | stl_cd1400ccrwait(portp); |
| 3472 | stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); |
| 3473 | stl_cd1400ccrwait(portp); |
| 3474 | portp->tx.tail = portp->tx.head; |
| 3475 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3476 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3477 | } |
| 3478 | |
| 3479 | /*****************************************************************************/ |
| 3480 | |
| 3481 | /* |
| 3482 | * Return the current state of data flow on this port. This is only |
| 3483 | * really interresting when determining if data has fully completed |
| 3484 | * transmission or not... This is easy for the cd1400, it accurately |
| 3485 | * maintains the busy port flag. |
| 3486 | */ |
| 3487 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3488 | static int stl_cd1400datastate(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3489 | { |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3490 | pr_debug("stl_cd1400datastate(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3491 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3492 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3493 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3494 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3495 | return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3496 | } |
| 3497 | |
| 3498 | /*****************************************************************************/ |
| 3499 | |
| 3500 | /* |
| 3501 | * Interrupt service routine for cd1400 EasyIO boards. |
| 3502 | */ |
| 3503 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3504 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3505 | { |
| 3506 | unsigned char svrtype; |
| 3507 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3508 | pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3509 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3510 | spin_lock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3511 | outb(SVRR, iobase); |
| 3512 | svrtype = inb(iobase + EREG_DATA); |
| 3513 | if (panelp->nrports > 4) { |
| 3514 | outb((SVRR + 0x80), iobase); |
| 3515 | svrtype |= inb(iobase + EREG_DATA); |
| 3516 | } |
| 3517 | |
| 3518 | if (svrtype & SVRR_RX) |
| 3519 | stl_cd1400rxisr(panelp, iobase); |
| 3520 | else if (svrtype & SVRR_TX) |
| 3521 | stl_cd1400txisr(panelp, iobase); |
| 3522 | else if (svrtype & SVRR_MDM) |
| 3523 | stl_cd1400mdmisr(panelp, iobase); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3524 | |
| 3525 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3526 | } |
| 3527 | |
| 3528 | /*****************************************************************************/ |
| 3529 | |
| 3530 | /* |
| 3531 | * Interrupt service routine for cd1400 panels. |
| 3532 | */ |
| 3533 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3534 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3535 | { |
| 3536 | unsigned char svrtype; |
| 3537 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3538 | pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3539 | |
| 3540 | outb(SVRR, iobase); |
| 3541 | svrtype = inb(iobase + EREG_DATA); |
| 3542 | outb((SVRR + 0x80), iobase); |
| 3543 | svrtype |= inb(iobase + EREG_DATA); |
| 3544 | if (svrtype & SVRR_RX) |
| 3545 | stl_cd1400rxisr(panelp, iobase); |
| 3546 | else if (svrtype & SVRR_TX) |
| 3547 | stl_cd1400txisr(panelp, iobase); |
| 3548 | else if (svrtype & SVRR_MDM) |
| 3549 | stl_cd1400mdmisr(panelp, iobase); |
| 3550 | } |
| 3551 | |
| 3552 | |
| 3553 | /*****************************************************************************/ |
| 3554 | |
| 3555 | /* |
| 3556 | * Unfortunately we need to handle breaks in the TX data stream, since |
| 3557 | * this is the only way to generate them on the cd1400. |
| 3558 | */ |
| 3559 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 3560 | static int stl_cd1400breakisr(struct stlport *portp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3561 | { |
| 3562 | if (portp->brklen == 1) { |
| 3563 | outb((COR2 + portp->uartaddr), ioaddr); |
| 3564 | outb((inb(ioaddr + EREG_DATA) | COR2_ETC), |
| 3565 | (ioaddr + EREG_DATA)); |
| 3566 | outb((TDR + portp->uartaddr), ioaddr); |
| 3567 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| 3568 | outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); |
| 3569 | outb((SRER + portp->uartaddr), ioaddr); |
| 3570 | outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), |
| 3571 | (ioaddr + EREG_DATA)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3572 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3573 | } else if (portp->brklen > 1) { |
| 3574 | outb((TDR + portp->uartaddr), ioaddr); |
| 3575 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| 3576 | outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); |
| 3577 | portp->brklen = -1; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3578 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3579 | } else { |
| 3580 | outb((COR2 + portp->uartaddr), ioaddr); |
| 3581 | outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), |
| 3582 | (ioaddr + EREG_DATA)); |
| 3583 | portp->brklen = 0; |
| 3584 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3585 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3586 | } |
| 3587 | |
| 3588 | /*****************************************************************************/ |
| 3589 | |
| 3590 | /* |
| 3591 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
| 3592 | * chars is pretty simple, stuff as many as possible from the TX buffer |
| 3593 | * into the cd1400 FIFO. Must also handle TX breaks here, since they |
| 3594 | * are embedded as commands in the data stream. Oh no, had to use a goto! |
| 3595 | * This could be optimized more, will do when I get time... |
| 3596 | * In practice it is possible that interrupts are enabled but that the |
| 3597 | * port has been hung up. Need to handle not having any TX buffer here, |
| 3598 | * this is done by using the side effect that head and tail will also |
| 3599 | * be NULL if the buffer has been freed. |
| 3600 | */ |
| 3601 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3602 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3603 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3604 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3605 | int len, stlen; |
| 3606 | char *head, *tail; |
| 3607 | unsigned char ioack, srer; |
| 3608 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3609 | pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3610 | |
| 3611 | ioack = inb(ioaddr + EREG_TXACK); |
| 3612 | if (((ioack & panelp->ackmask) != 0) || |
| 3613 | ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { |
| 3614 | printk("STALLION: bad TX interrupt ack value=%x\n", ioack); |
| 3615 | return; |
| 3616 | } |
| 3617 | portp = panelp->ports[(ioack >> 3)]; |
| 3618 | |
| 3619 | /* |
| 3620 | * Unfortunately we need to handle breaks in the data stream, since |
| 3621 | * this is the only way to generate them on the cd1400. Do it now if |
| 3622 | * a break is to be sent. |
| 3623 | */ |
| 3624 | if (portp->brklen != 0) |
| 3625 | if (stl_cd1400breakisr(portp, ioaddr)) |
| 3626 | goto stl_txalldone; |
| 3627 | |
| 3628 | head = portp->tx.head; |
| 3629 | tail = portp->tx.tail; |
| 3630 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 3631 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
| 3632 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| 3633 | set_bit(ASYI_TXLOW, &portp->istate); |
| 3634 | schedule_work(&portp->tqueue); |
| 3635 | } |
| 3636 | |
| 3637 | if (len == 0) { |
| 3638 | outb((SRER + portp->uartaddr), ioaddr); |
| 3639 | srer = inb(ioaddr + EREG_DATA); |
| 3640 | if (srer & SRER_TXDATA) { |
| 3641 | srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; |
| 3642 | } else { |
| 3643 | srer &= ~(SRER_TXDATA | SRER_TXEMPTY); |
| 3644 | clear_bit(ASYI_TXBUSY, &portp->istate); |
| 3645 | } |
| 3646 | outb(srer, (ioaddr + EREG_DATA)); |
| 3647 | } else { |
| 3648 | len = MIN(len, CD1400_TXFIFOSIZE); |
| 3649 | portp->stats.txtotal += len; |
| 3650 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
| 3651 | outb((TDR + portp->uartaddr), ioaddr); |
| 3652 | outsb((ioaddr + EREG_DATA), tail, stlen); |
| 3653 | len -= stlen; |
| 3654 | tail += stlen; |
| 3655 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 3656 | tail = portp->tx.buf; |
| 3657 | if (len > 0) { |
| 3658 | outsb((ioaddr + EREG_DATA), tail, len); |
| 3659 | tail += len; |
| 3660 | } |
| 3661 | portp->tx.tail = tail; |
| 3662 | } |
| 3663 | |
| 3664 | stl_txalldone: |
| 3665 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3666 | outb(0, (ioaddr + EREG_DATA)); |
| 3667 | } |
| 3668 | |
| 3669 | /*****************************************************************************/ |
| 3670 | |
| 3671 | /* |
| 3672 | * Receive character interrupt handler. Determine if we have good chars |
| 3673 | * or bad chars and then process appropriately. Good chars are easy |
| 3674 | * just shove the lot into the RX buffer and set all status byte to 0. |
| 3675 | * If a bad RX char then process as required. This routine needs to be |
| 3676 | * fast! In practice it is possible that we get an interrupt on a port |
| 3677 | * that is closed. This can happen on hangups - since they completely |
| 3678 | * shutdown a port not in user context. Need to handle this case. |
| 3679 | */ |
| 3680 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3681 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3682 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3683 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3684 | struct tty_struct *tty; |
| 3685 | unsigned int ioack, len, buflen; |
| 3686 | unsigned char status; |
| 3687 | char ch; |
| 3688 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3689 | pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3690 | |
| 3691 | ioack = inb(ioaddr + EREG_RXACK); |
| 3692 | if ((ioack & panelp->ackmask) != 0) { |
| 3693 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| 3694 | return; |
| 3695 | } |
| 3696 | portp = panelp->ports[(ioack >> 3)]; |
| 3697 | tty = portp->tty; |
| 3698 | |
| 3699 | if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { |
| 3700 | outb((RDCR + portp->uartaddr), ioaddr); |
| 3701 | len = inb(ioaddr + EREG_DATA); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3702 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3703 | len = MIN(len, sizeof(stl_unwanted)); |
| 3704 | outb((RDSR + portp->uartaddr), ioaddr); |
| 3705 | insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); |
| 3706 | portp->stats.rxlost += len; |
| 3707 | portp->stats.rxtotal += len; |
| 3708 | } else { |
| 3709 | len = MIN(len, buflen); |
| 3710 | if (len > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3711 | unsigned char *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3712 | outb((RDSR + portp->uartaddr), ioaddr); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3713 | tty_prepare_flip_string(tty, &ptr, len); |
| 3714 | insb((ioaddr + EREG_DATA), ptr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3715 | tty_schedule_flip(tty); |
| 3716 | portp->stats.rxtotal += len; |
| 3717 | } |
| 3718 | } |
| 3719 | } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { |
| 3720 | outb((RDSR + portp->uartaddr), ioaddr); |
| 3721 | status = inb(ioaddr + EREG_DATA); |
| 3722 | ch = inb(ioaddr + EREG_DATA); |
| 3723 | if (status & ST_PARITY) |
| 3724 | portp->stats.rxparity++; |
| 3725 | if (status & ST_FRAMING) |
| 3726 | portp->stats.rxframing++; |
| 3727 | if (status & ST_OVERRUN) |
| 3728 | portp->stats.rxoverrun++; |
| 3729 | if (status & ST_BREAK) |
| 3730 | portp->stats.rxbreaks++; |
| 3731 | if (status & ST_SCHARMASK) { |
| 3732 | if ((status & ST_SCHARMASK) == ST_SCHAR1) |
| 3733 | portp->stats.txxon++; |
| 3734 | if ((status & ST_SCHARMASK) == ST_SCHAR2) |
| 3735 | portp->stats.txxoff++; |
| 3736 | goto stl_rxalldone; |
| 3737 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3738 | if (tty != NULL && (portp->rxignoremsk & status) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3739 | if (portp->rxmarkmsk & status) { |
| 3740 | if (status & ST_BREAK) { |
| 3741 | status = TTY_BREAK; |
| 3742 | if (portp->flags & ASYNC_SAK) { |
| 3743 | do_SAK(tty); |
| 3744 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3745 | } |
| 3746 | } else if (status & ST_PARITY) { |
| 3747 | status = TTY_PARITY; |
| 3748 | } else if (status & ST_FRAMING) { |
| 3749 | status = TTY_FRAME; |
| 3750 | } else if(status & ST_OVERRUN) { |
| 3751 | status = TTY_OVERRUN; |
| 3752 | } else { |
| 3753 | status = 0; |
| 3754 | } |
| 3755 | } else { |
| 3756 | status = 0; |
| 3757 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3758 | tty_insert_flip_char(tty, ch, status); |
| 3759 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3760 | } |
| 3761 | } else { |
| 3762 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| 3763 | return; |
| 3764 | } |
| 3765 | |
| 3766 | stl_rxalldone: |
| 3767 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3768 | outb(0, (ioaddr + EREG_DATA)); |
| 3769 | } |
| 3770 | |
| 3771 | /*****************************************************************************/ |
| 3772 | |
| 3773 | /* |
| 3774 | * Modem interrupt handler. The is called when the modem signal line |
| 3775 | * (DCD) has changed state. Leave most of the work to the off-level |
| 3776 | * processing routine. |
| 3777 | */ |
| 3778 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3779 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3780 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3781 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3782 | unsigned int ioack; |
| 3783 | unsigned char misr; |
| 3784 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3785 | pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3786 | |
| 3787 | ioack = inb(ioaddr + EREG_MDACK); |
| 3788 | if (((ioack & panelp->ackmask) != 0) || |
| 3789 | ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { |
| 3790 | printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); |
| 3791 | return; |
| 3792 | } |
| 3793 | portp = panelp->ports[(ioack >> 3)]; |
| 3794 | |
| 3795 | outb((MISR + portp->uartaddr), ioaddr); |
| 3796 | misr = inb(ioaddr + EREG_DATA); |
| 3797 | if (misr & MISR_DCD) { |
| 3798 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
| 3799 | schedule_work(&portp->tqueue); |
| 3800 | portp->stats.modem++; |
| 3801 | } |
| 3802 | |
| 3803 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3804 | outb(0, (ioaddr + EREG_DATA)); |
| 3805 | } |
| 3806 | |
| 3807 | /*****************************************************************************/ |
| 3808 | /* SC26198 HARDWARE FUNCTIONS */ |
| 3809 | /*****************************************************************************/ |
| 3810 | |
| 3811 | /* |
| 3812 | * These functions get/set/update the registers of the sc26198 UARTs. |
| 3813 | * Access to the sc26198 registers is via an address/data io port pair. |
| 3814 | * (Maybe should make this inline...) |
| 3815 | */ |
| 3816 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3817 | static int stl_sc26198getreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3818 | { |
| 3819 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3820 | return inb(portp->ioaddr + XP_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3821 | } |
| 3822 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3823 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3824 | { |
| 3825 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| 3826 | outb(value, (portp->ioaddr + XP_DATA)); |
| 3827 | } |
| 3828 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3829 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3830 | { |
| 3831 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| 3832 | if (inb(portp->ioaddr + XP_DATA) != value) { |
| 3833 | outb(value, (portp->ioaddr + XP_DATA)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3834 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3835 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3836 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3837 | } |
| 3838 | |
| 3839 | /*****************************************************************************/ |
| 3840 | |
| 3841 | /* |
| 3842 | * Functions to get and set the sc26198 global registers. |
| 3843 | */ |
| 3844 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3845 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3846 | { |
| 3847 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3848 | return inb(portp->ioaddr + XP_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3849 | } |
| 3850 | |
| 3851 | #if 0 |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3852 | static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3853 | { |
| 3854 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
| 3855 | outb(value, (portp->ioaddr + XP_DATA)); |
| 3856 | } |
| 3857 | #endif |
| 3858 | |
| 3859 | /*****************************************************************************/ |
| 3860 | |
| 3861 | /* |
| 3862 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
| 3863 | * these ports are on - since the port io registers are almost |
| 3864 | * identical when dealing with ports. |
| 3865 | */ |
| 3866 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3867 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3868 | { |
| 3869 | int chipmask, i; |
| 3870 | int nrchips, ioaddr; |
| 3871 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3872 | pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3873 | |
| 3874 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
| 3875 | |
| 3876 | /* |
| 3877 | * Check that each chip is present and started up OK. |
| 3878 | */ |
| 3879 | chipmask = 0; |
| 3880 | nrchips = (panelp->nrports + 4) / SC26198_PORTS; |
| 3881 | if (brdp->brdtype == BRD_ECHPCI) |
| 3882 | outb(panelp->pagenr, brdp->ioctrl); |
| 3883 | |
| 3884 | for (i = 0; (i < nrchips); i++) { |
| 3885 | ioaddr = panelp->iobase + (i * 4); |
| 3886 | outb(SCCR, (ioaddr + XP_ADDR)); |
| 3887 | outb(CR_RESETALL, (ioaddr + XP_DATA)); |
| 3888 | outb(TSTR, (ioaddr + XP_ADDR)); |
| 3889 | if (inb(ioaddr + XP_DATA) != 0) { |
| 3890 | printk("STALLION: sc26198 not responding, " |
| 3891 | "brd=%d panel=%d chip=%d\n", |
| 3892 | panelp->brdnr, panelp->panelnr, i); |
| 3893 | continue; |
| 3894 | } |
| 3895 | chipmask |= (0x1 << i); |
| 3896 | outb(GCCR, (ioaddr + XP_ADDR)); |
| 3897 | outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); |
| 3898 | outb(WDTRCR, (ioaddr + XP_ADDR)); |
| 3899 | outb(0xff, (ioaddr + XP_DATA)); |
| 3900 | } |
| 3901 | |
| 3902 | BRDDISABLE(panelp->brdnr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3903 | return chipmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3904 | } |
| 3905 | |
| 3906 | /*****************************************************************************/ |
| 3907 | |
| 3908 | /* |
| 3909 | * Initialize hardware specific port registers. |
| 3910 | */ |
| 3911 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3912 | 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] | 3913 | { |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3914 | pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
| 3915 | panelp, portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3916 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3917 | if ((brdp == NULL) || (panelp == NULL) || |
| 3918 | (portp == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3919 | return; |
| 3920 | |
| 3921 | portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); |
| 3922 | portp->uartaddr = (portp->portnr & 0x07) << 4; |
| 3923 | portp->pagenr = panelp->pagenr; |
| 3924 | portp->hwid = 0x1; |
| 3925 | |
| 3926 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3927 | stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); |
| 3928 | BRDDISABLE(portp->brdnr); |
| 3929 | } |
| 3930 | |
| 3931 | /*****************************************************************************/ |
| 3932 | |
| 3933 | /* |
| 3934 | * Set up the sc26198 registers for a port based on the termios port |
| 3935 | * settings. |
| 3936 | */ |
| 3937 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 3938 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3939 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3940 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3941 | unsigned long flags; |
| 3942 | unsigned int baudrate; |
| 3943 | unsigned char mr0, mr1, mr2, clk; |
| 3944 | unsigned char imron, imroff, iopr, ipr; |
| 3945 | |
| 3946 | mr0 = 0; |
| 3947 | mr1 = 0; |
| 3948 | mr2 = 0; |
| 3949 | clk = 0; |
| 3950 | iopr = 0; |
| 3951 | imron = 0; |
| 3952 | imroff = 0; |
| 3953 | |
| 3954 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3955 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3956 | return; |
| 3957 | |
| 3958 | /* |
| 3959 | * Set up the RX char ignore mask with those RX error types we |
| 3960 | * can ignore. |
| 3961 | */ |
| 3962 | portp->rxignoremsk = 0; |
| 3963 | if (tiosp->c_iflag & IGNPAR) |
| 3964 | portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | |
| 3965 | SR_RXOVERRUN); |
| 3966 | if (tiosp->c_iflag & IGNBRK) |
| 3967 | portp->rxignoremsk |= SR_RXBREAK; |
| 3968 | |
| 3969 | portp->rxmarkmsk = SR_RXOVERRUN; |
| 3970 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
| 3971 | portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); |
| 3972 | if (tiosp->c_iflag & BRKINT) |
| 3973 | portp->rxmarkmsk |= SR_RXBREAK; |
| 3974 | |
| 3975 | /* |
| 3976 | * Go through the char size, parity and stop bits and set all the |
| 3977 | * option register appropriately. |
| 3978 | */ |
| 3979 | switch (tiosp->c_cflag & CSIZE) { |
| 3980 | case CS5: |
| 3981 | mr1 |= MR1_CS5; |
| 3982 | break; |
| 3983 | case CS6: |
| 3984 | mr1 |= MR1_CS6; |
| 3985 | break; |
| 3986 | case CS7: |
| 3987 | mr1 |= MR1_CS7; |
| 3988 | break; |
| 3989 | default: |
| 3990 | mr1 |= MR1_CS8; |
| 3991 | break; |
| 3992 | } |
| 3993 | |
| 3994 | if (tiosp->c_cflag & CSTOPB) |
| 3995 | mr2 |= MR2_STOP2; |
| 3996 | else |
| 3997 | mr2 |= MR2_STOP1; |
| 3998 | |
| 3999 | if (tiosp->c_cflag & PARENB) { |
| 4000 | if (tiosp->c_cflag & PARODD) |
| 4001 | mr1 |= (MR1_PARENB | MR1_PARODD); |
| 4002 | else |
| 4003 | mr1 |= (MR1_PARENB | MR1_PAREVEN); |
| 4004 | } else { |
| 4005 | mr1 |= MR1_PARNONE; |
| 4006 | } |
| 4007 | |
| 4008 | mr1 |= MR1_ERRBLOCK; |
| 4009 | |
| 4010 | /* |
| 4011 | * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing |
| 4012 | * space for hardware flow control and the like. This should be set to |
| 4013 | * VMIN. |
| 4014 | */ |
| 4015 | mr2 |= MR2_RXFIFOHALF; |
| 4016 | |
| 4017 | /* |
| 4018 | * Calculate the baud rate timers. For now we will just assume that |
| 4019 | * the input and output baud are the same. The sc26198 has a fixed |
| 4020 | * baud rate table, so only discrete baud rates possible. |
| 4021 | */ |
| 4022 | baudrate = tiosp->c_cflag & CBAUD; |
| 4023 | if (baudrate & CBAUDEX) { |
| 4024 | baudrate &= ~CBAUDEX; |
| 4025 | if ((baudrate < 1) || (baudrate > 4)) |
| 4026 | tiosp->c_cflag &= ~CBAUDEX; |
| 4027 | else |
| 4028 | baudrate += 15; |
| 4029 | } |
| 4030 | baudrate = stl_baudrates[baudrate]; |
| 4031 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
| 4032 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 4033 | baudrate = 57600; |
| 4034 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 4035 | baudrate = 115200; |
| 4036 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 4037 | baudrate = 230400; |
| 4038 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 4039 | baudrate = 460800; |
| 4040 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| 4041 | baudrate = (portp->baud_base / portp->custom_divisor); |
| 4042 | } |
| 4043 | if (baudrate > STL_SC26198MAXBAUD) |
| 4044 | baudrate = STL_SC26198MAXBAUD; |
| 4045 | |
| 4046 | if (baudrate > 0) { |
| 4047 | for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { |
| 4048 | if (baudrate <= sc26198_baudtable[clk]) |
| 4049 | break; |
| 4050 | } |
| 4051 | } |
| 4052 | |
| 4053 | /* |
| 4054 | * Check what form of modem signaling is required and set it up. |
| 4055 | */ |
| 4056 | if (tiosp->c_cflag & CLOCAL) { |
| 4057 | portp->flags &= ~ASYNC_CHECK_CD; |
| 4058 | } else { |
| 4059 | iopr |= IOPR_DCDCOS; |
| 4060 | imron |= IR_IOPORT; |
| 4061 | portp->flags |= ASYNC_CHECK_CD; |
| 4062 | } |
| 4063 | |
| 4064 | /* |
| 4065 | * Setup sc26198 enhanced modes if we can. In particular we want to |
| 4066 | * handle as much of the flow control as possible automatically. As |
| 4067 | * well as saving a few CPU cycles it will also greatly improve flow |
| 4068 | * control reliability. |
| 4069 | */ |
| 4070 | if (tiosp->c_iflag & IXON) { |
| 4071 | mr0 |= MR0_SWFTX | MR0_SWFT; |
| 4072 | imron |= IR_XONXOFF; |
| 4073 | } else { |
| 4074 | imroff |= IR_XONXOFF; |
| 4075 | } |
| 4076 | if (tiosp->c_iflag & IXOFF) |
| 4077 | mr0 |= MR0_SWFRX; |
| 4078 | |
| 4079 | if (tiosp->c_cflag & CRTSCTS) { |
| 4080 | mr2 |= MR2_AUTOCTS; |
| 4081 | mr1 |= MR1_AUTORTS; |
| 4082 | } |
| 4083 | |
| 4084 | /* |
| 4085 | * All sc26198 register values calculated so go through and set |
| 4086 | * them all up. |
| 4087 | */ |
| 4088 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4089 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4090 | portp->portnr, portp->panelnr, portp->brdnr); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4091 | pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); |
| 4092 | pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); |
| 4093 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4094 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| 4095 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4096 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4097 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4098 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4099 | stl_sc26198setreg(portp, IMR, 0); |
| 4100 | stl_sc26198updatereg(portp, MR0, mr0); |
| 4101 | stl_sc26198updatereg(portp, MR1, mr1); |
| 4102 | stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); |
| 4103 | stl_sc26198updatereg(portp, MR2, mr2); |
| 4104 | stl_sc26198updatereg(portp, IOPIOR, |
| 4105 | ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); |
| 4106 | |
| 4107 | if (baudrate > 0) { |
| 4108 | stl_sc26198setreg(portp, TXCSR, clk); |
| 4109 | stl_sc26198setreg(portp, RXCSR, clk); |
| 4110 | } |
| 4111 | |
| 4112 | stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); |
| 4113 | stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); |
| 4114 | |
| 4115 | ipr = stl_sc26198getreg(portp, IPR); |
| 4116 | if (ipr & IPR_DCD) |
| 4117 | portp->sigs &= ~TIOCM_CD; |
| 4118 | else |
| 4119 | portp->sigs |= TIOCM_CD; |
| 4120 | |
| 4121 | portp->imr = (portp->imr & ~imroff) | imron; |
| 4122 | stl_sc26198setreg(portp, IMR, portp->imr); |
| 4123 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4124 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4125 | } |
| 4126 | |
| 4127 | /*****************************************************************************/ |
| 4128 | |
| 4129 | /* |
| 4130 | * Set the state of the DTR and RTS signals. |
| 4131 | */ |
| 4132 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4133 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4134 | { |
| 4135 | unsigned char iopioron, iopioroff; |
| 4136 | unsigned long flags; |
| 4137 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4138 | pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp, |
| 4139 | dtr, rts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4140 | |
| 4141 | iopioron = 0; |
| 4142 | iopioroff = 0; |
| 4143 | if (dtr == 0) |
| 4144 | iopioroff |= IPR_DTR; |
| 4145 | else if (dtr > 0) |
| 4146 | iopioron |= IPR_DTR; |
| 4147 | if (rts == 0) |
| 4148 | iopioroff |= IPR_RTS; |
| 4149 | else if (rts > 0) |
| 4150 | iopioron |= IPR_RTS; |
| 4151 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4152 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4153 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4154 | stl_sc26198setreg(portp, IOPIOR, |
| 4155 | ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); |
| 4156 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4157 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4158 | } |
| 4159 | |
| 4160 | /*****************************************************************************/ |
| 4161 | |
| 4162 | /* |
| 4163 | * Return the state of the signals. |
| 4164 | */ |
| 4165 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4166 | static int stl_sc26198getsignals(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4167 | { |
| 4168 | unsigned char ipr; |
| 4169 | unsigned long flags; |
| 4170 | int sigs; |
| 4171 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4172 | pr_debug("stl_sc26198getsignals(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4173 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4174 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4175 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4176 | ipr = stl_sc26198getreg(portp, IPR); |
| 4177 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4178 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4179 | |
| 4180 | sigs = 0; |
| 4181 | sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; |
| 4182 | sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; |
| 4183 | sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; |
| 4184 | sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; |
| 4185 | sigs |= TIOCM_DSR; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4186 | return sigs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4187 | } |
| 4188 | |
| 4189 | /*****************************************************************************/ |
| 4190 | |
| 4191 | /* |
| 4192 | * Enable/Disable the Transmitter and/or Receiver. |
| 4193 | */ |
| 4194 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4195 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4196 | { |
| 4197 | unsigned char ccr; |
| 4198 | unsigned long flags; |
| 4199 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4200 | 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] | 4201 | |
| 4202 | ccr = portp->crenable; |
| 4203 | if (tx == 0) |
| 4204 | ccr &= ~CR_TXENABLE; |
| 4205 | else if (tx > 0) |
| 4206 | ccr |= CR_TXENABLE; |
| 4207 | if (rx == 0) |
| 4208 | ccr &= ~CR_RXENABLE; |
| 4209 | else if (rx > 0) |
| 4210 | ccr |= CR_RXENABLE; |
| 4211 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4212 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4213 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4214 | stl_sc26198setreg(portp, SCCR, ccr); |
| 4215 | BRDDISABLE(portp->brdnr); |
| 4216 | portp->crenable = ccr; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4217 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4218 | } |
| 4219 | |
| 4220 | /*****************************************************************************/ |
| 4221 | |
| 4222 | /* |
| 4223 | * Start/stop the Transmitter and/or Receiver. |
| 4224 | */ |
| 4225 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4226 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4227 | { |
| 4228 | unsigned char imr; |
| 4229 | unsigned long flags; |
| 4230 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4231 | 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] | 4232 | |
| 4233 | imr = portp->imr; |
| 4234 | if (tx == 0) |
| 4235 | imr &= ~IR_TXRDY; |
| 4236 | else if (tx == 1) |
| 4237 | imr |= IR_TXRDY; |
| 4238 | if (rx == 0) |
| 4239 | imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); |
| 4240 | else if (rx > 0) |
| 4241 | imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; |
| 4242 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4243 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4244 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4245 | stl_sc26198setreg(portp, IMR, imr); |
| 4246 | BRDDISABLE(portp->brdnr); |
| 4247 | portp->imr = imr; |
| 4248 | if (tx > 0) |
| 4249 | set_bit(ASYI_TXBUSY, &portp->istate); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4250 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | } |
| 4252 | |
| 4253 | /*****************************************************************************/ |
| 4254 | |
| 4255 | /* |
| 4256 | * Disable all interrupts from this port. |
| 4257 | */ |
| 4258 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4259 | static void stl_sc26198disableintrs(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4260 | { |
| 4261 | unsigned long flags; |
| 4262 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4263 | pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4264 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4265 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4266 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4267 | portp->imr = 0; |
| 4268 | stl_sc26198setreg(portp, IMR, 0); |
| 4269 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4270 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4271 | } |
| 4272 | |
| 4273 | /*****************************************************************************/ |
| 4274 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4275 | static void stl_sc26198sendbreak(struct stlport *portp, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4276 | { |
| 4277 | unsigned long flags; |
| 4278 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4279 | pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4280 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4281 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4282 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4283 | if (len == 1) { |
| 4284 | stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); |
| 4285 | portp->stats.txbreaks++; |
| 4286 | } else { |
| 4287 | stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); |
| 4288 | } |
| 4289 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4290 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4291 | } |
| 4292 | |
| 4293 | /*****************************************************************************/ |
| 4294 | |
| 4295 | /* |
| 4296 | * Take flow control actions... |
| 4297 | */ |
| 4298 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4299 | static void stl_sc26198flowctrl(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4300 | { |
| 4301 | struct tty_struct *tty; |
| 4302 | unsigned long flags; |
| 4303 | unsigned char mr0; |
| 4304 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4305 | pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4306 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4307 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4308 | return; |
| 4309 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4310 | if (tty == 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 | |
| 4316 | if (state) { |
| 4317 | if (tty->termios->c_iflag & IXOFF) { |
| 4318 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4319 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4320 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| 4321 | mr0 |= MR0_SWFRX; |
| 4322 | portp->stats.rxxon++; |
| 4323 | stl_sc26198wait(portp); |
| 4324 | stl_sc26198setreg(portp, MR0, mr0); |
| 4325 | } |
| 4326 | /* |
| 4327 | * Question: should we return RTS to what it was before? It may |
| 4328 | * have been set by an ioctl... Suppose not, since if you have |
| 4329 | * hardware flow control set then it is pretty silly to go and |
| 4330 | * set the RTS line by hand. |
| 4331 | */ |
| 4332 | if (tty->termios->c_cflag & CRTSCTS) { |
| 4333 | stl_sc26198setreg(portp, MR1, |
| 4334 | (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); |
| 4335 | stl_sc26198setreg(portp, IOPIOR, |
| 4336 | (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); |
| 4337 | portp->stats.rxrtson++; |
| 4338 | } |
| 4339 | } else { |
| 4340 | if (tty->termios->c_iflag & IXOFF) { |
| 4341 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4342 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4343 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| 4344 | mr0 &= ~MR0_SWFRX; |
| 4345 | portp->stats.rxxoff++; |
| 4346 | stl_sc26198wait(portp); |
| 4347 | stl_sc26198setreg(portp, MR0, mr0); |
| 4348 | } |
| 4349 | if (tty->termios->c_cflag & CRTSCTS) { |
| 4350 | stl_sc26198setreg(portp, MR1, |
| 4351 | (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); |
| 4352 | stl_sc26198setreg(portp, IOPIOR, |
| 4353 | (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); |
| 4354 | portp->stats.rxrtsoff++; |
| 4355 | } |
| 4356 | } |
| 4357 | |
| 4358 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4359 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4360 | } |
| 4361 | |
| 4362 | /*****************************************************************************/ |
| 4363 | |
| 4364 | /* |
| 4365 | * Send a flow control character. |
| 4366 | */ |
| 4367 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4368 | static void stl_sc26198sendflow(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4369 | { |
| 4370 | struct tty_struct *tty; |
| 4371 | unsigned long flags; |
| 4372 | unsigned char mr0; |
| 4373 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4374 | pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4375 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4376 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4377 | return; |
| 4378 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4379 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4380 | return; |
| 4381 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4382 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4383 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4384 | if (state) { |
| 4385 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4386 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4387 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| 4388 | mr0 |= MR0_SWFRX; |
| 4389 | portp->stats.rxxon++; |
| 4390 | stl_sc26198wait(portp); |
| 4391 | stl_sc26198setreg(portp, MR0, mr0); |
| 4392 | } else { |
| 4393 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4394 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4395 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| 4396 | mr0 &= ~MR0_SWFRX; |
| 4397 | portp->stats.rxxoff++; |
| 4398 | stl_sc26198wait(portp); |
| 4399 | stl_sc26198setreg(portp, MR0, mr0); |
| 4400 | } |
| 4401 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4402 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4403 | } |
| 4404 | |
| 4405 | /*****************************************************************************/ |
| 4406 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4407 | static void stl_sc26198flush(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4408 | { |
| 4409 | unsigned long flags; |
| 4410 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4411 | pr_debug("stl_sc26198flush(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4412 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4413 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4414 | return; |
| 4415 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4416 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4417 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4418 | stl_sc26198setreg(portp, SCCR, CR_TXRESET); |
| 4419 | stl_sc26198setreg(portp, SCCR, portp->crenable); |
| 4420 | BRDDISABLE(portp->brdnr); |
| 4421 | portp->tx.tail = portp->tx.head; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4422 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4423 | } |
| 4424 | |
| 4425 | /*****************************************************************************/ |
| 4426 | |
| 4427 | /* |
| 4428 | * Return the current state of data flow on this port. This is only |
| 4429 | * really interresting when determining if data has fully completed |
| 4430 | * transmission or not... The sc26198 interrupt scheme cannot |
| 4431 | * determine when all data has actually drained, so we need to |
| 4432 | * check the port statusy register to be sure. |
| 4433 | */ |
| 4434 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4435 | static int stl_sc26198datastate(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4436 | { |
| 4437 | unsigned long flags; |
| 4438 | unsigned char sr; |
| 4439 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4440 | pr_debug("stl_sc26198datastate(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4441 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4442 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4443 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4444 | if (test_bit(ASYI_TXBUSY, &portp->istate)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4445 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4446 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4447 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4448 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4449 | sr = stl_sc26198getreg(portp, SR); |
| 4450 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4451 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4452 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4453 | return (sr & SR_TXEMPTY) ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4454 | } |
| 4455 | |
| 4456 | /*****************************************************************************/ |
| 4457 | |
| 4458 | /* |
| 4459 | * Delay for a small amount of time, to give the sc26198 a chance |
| 4460 | * to process a command... |
| 4461 | */ |
| 4462 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4463 | static void stl_sc26198wait(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4464 | { |
| 4465 | int i; |
| 4466 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4467 | pr_debug("stl_sc26198wait(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4468 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4469 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4470 | return; |
| 4471 | |
| 4472 | for (i = 0; (i < 20); i++) |
| 4473 | stl_sc26198getglobreg(portp, TSTR); |
| 4474 | } |
| 4475 | |
| 4476 | /*****************************************************************************/ |
| 4477 | |
| 4478 | /* |
| 4479 | * If we are TX flow controlled and in IXANY mode then we may |
| 4480 | * need to unflow control here. We gotta do this because of the |
| 4481 | * automatic flow control modes of the sc26198. |
| 4482 | */ |
| 4483 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4484 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4485 | { |
| 4486 | unsigned char mr0; |
| 4487 | |
| 4488 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4489 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4490 | stl_sc26198setreg(portp, SCCR, CR_HOSTXON); |
| 4491 | stl_sc26198wait(portp); |
| 4492 | stl_sc26198setreg(portp, MR0, mr0); |
| 4493 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
| 4494 | } |
| 4495 | |
| 4496 | /*****************************************************************************/ |
| 4497 | |
| 4498 | /* |
| 4499 | * Interrupt service routine for sc26198 panels. |
| 4500 | */ |
| 4501 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4502 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4503 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4504 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4505 | unsigned int iack; |
| 4506 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4507 | spin_lock(&brd_lock); |
| 4508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4509 | /* |
| 4510 | * Work around bug in sc26198 chip... Cannot have A6 address |
| 4511 | * line of UART high, else iack will be returned as 0. |
| 4512 | */ |
| 4513 | outb(0, (iobase + 1)); |
| 4514 | |
| 4515 | iack = inb(iobase + XP_IACK); |
| 4516 | portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; |
| 4517 | |
| 4518 | if (iack & IVR_RXDATA) |
| 4519 | stl_sc26198rxisr(portp, iack); |
| 4520 | else if (iack & IVR_TXDATA) |
| 4521 | stl_sc26198txisr(portp); |
| 4522 | else |
| 4523 | stl_sc26198otherisr(portp, iack); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4524 | |
| 4525 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4526 | } |
| 4527 | |
| 4528 | /*****************************************************************************/ |
| 4529 | |
| 4530 | /* |
| 4531 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
| 4532 | * chars is pretty simple, stuff as many as possible from the TX buffer |
| 4533 | * into the sc26198 FIFO. |
| 4534 | * In practice it is possible that interrupts are enabled but that the |
| 4535 | * port has been hung up. Need to handle not having any TX buffer here, |
| 4536 | * this is done by using the side effect that head and tail will also |
| 4537 | * be NULL if the buffer has been freed. |
| 4538 | */ |
| 4539 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4540 | static void stl_sc26198txisr(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4541 | { |
| 4542 | unsigned int ioaddr; |
| 4543 | unsigned char mr0; |
| 4544 | int len, stlen; |
| 4545 | char *head, *tail; |
| 4546 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4547 | pr_debug("stl_sc26198txisr(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4548 | |
| 4549 | ioaddr = portp->ioaddr; |
| 4550 | head = portp->tx.head; |
| 4551 | tail = portp->tx.tail; |
| 4552 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 4553 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
| 4554 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| 4555 | set_bit(ASYI_TXLOW, &portp->istate); |
| 4556 | schedule_work(&portp->tqueue); |
| 4557 | } |
| 4558 | |
| 4559 | if (len == 0) { |
| 4560 | outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); |
| 4561 | mr0 = inb(ioaddr + XP_DATA); |
| 4562 | if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { |
| 4563 | portp->imr &= ~IR_TXRDY; |
| 4564 | outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); |
| 4565 | outb(portp->imr, (ioaddr + XP_DATA)); |
| 4566 | clear_bit(ASYI_TXBUSY, &portp->istate); |
| 4567 | } else { |
| 4568 | mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); |
| 4569 | outb(mr0, (ioaddr + XP_DATA)); |
| 4570 | } |
| 4571 | } else { |
| 4572 | len = MIN(len, SC26198_TXFIFOSIZE); |
| 4573 | portp->stats.txtotal += len; |
| 4574 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
| 4575 | outb(GTXFIFO, (ioaddr + XP_ADDR)); |
| 4576 | outsb((ioaddr + XP_DATA), tail, stlen); |
| 4577 | len -= stlen; |
| 4578 | tail += stlen; |
| 4579 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 4580 | tail = portp->tx.buf; |
| 4581 | if (len > 0) { |
| 4582 | outsb((ioaddr + XP_DATA), tail, len); |
| 4583 | tail += len; |
| 4584 | } |
| 4585 | portp->tx.tail = tail; |
| 4586 | } |
| 4587 | } |
| 4588 | |
| 4589 | /*****************************************************************************/ |
| 4590 | |
| 4591 | /* |
| 4592 | * Receive character interrupt handler. Determine if we have good chars |
| 4593 | * or bad chars and then process appropriately. Good chars are easy |
| 4594 | * just shove the lot into the RX buffer and set all status byte to 0. |
| 4595 | * If a bad RX char then process as required. This routine needs to be |
| 4596 | * fast! In practice it is possible that we get an interrupt on a port |
| 4597 | * that is closed. This can happen on hangups - since they completely |
| 4598 | * shutdown a port not in user context. Need to handle this case. |
| 4599 | */ |
| 4600 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4601 | static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4602 | { |
| 4603 | struct tty_struct *tty; |
| 4604 | unsigned int len, buflen, ioaddr; |
| 4605 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4606 | pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4607 | |
| 4608 | tty = portp->tty; |
| 4609 | ioaddr = portp->ioaddr; |
| 4610 | outb(GIBCR, (ioaddr + XP_ADDR)); |
| 4611 | len = inb(ioaddr + XP_DATA) + 1; |
| 4612 | |
| 4613 | if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4614 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4615 | len = MIN(len, sizeof(stl_unwanted)); |
| 4616 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
| 4617 | insb((ioaddr + XP_DATA), &stl_unwanted[0], len); |
| 4618 | portp->stats.rxlost += len; |
| 4619 | portp->stats.rxtotal += len; |
| 4620 | } else { |
| 4621 | len = MIN(len, buflen); |
| 4622 | if (len > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4623 | unsigned char *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4624 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4625 | tty_prepare_flip_string(tty, &ptr, len); |
| 4626 | insb((ioaddr + XP_DATA), ptr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4627 | tty_schedule_flip(tty); |
| 4628 | portp->stats.rxtotal += len; |
| 4629 | } |
| 4630 | } |
| 4631 | } else { |
| 4632 | stl_sc26198rxbadchars(portp); |
| 4633 | } |
| 4634 | |
| 4635 | /* |
| 4636 | * If we are TX flow controlled and in IXANY mode then we may need |
| 4637 | * to unflow control here. We gotta do this because of the automatic |
| 4638 | * flow control modes of the sc26198. |
| 4639 | */ |
| 4640 | if (test_bit(ASYI_TXFLOWED, &portp->istate)) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4641 | if ((tty != NULL) && |
| 4642 | (tty->termios != NULL) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4643 | (tty->termios->c_iflag & IXANY)) { |
| 4644 | stl_sc26198txunflow(portp, tty); |
| 4645 | } |
| 4646 | } |
| 4647 | } |
| 4648 | |
| 4649 | /*****************************************************************************/ |
| 4650 | |
| 4651 | /* |
| 4652 | * Process an RX bad character. |
| 4653 | */ |
| 4654 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4655 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4656 | { |
| 4657 | struct tty_struct *tty; |
| 4658 | unsigned int ioaddr; |
| 4659 | |
| 4660 | tty = portp->tty; |
| 4661 | ioaddr = portp->ioaddr; |
| 4662 | |
| 4663 | if (status & SR_RXPARITY) |
| 4664 | portp->stats.rxparity++; |
| 4665 | if (status & SR_RXFRAMING) |
| 4666 | portp->stats.rxframing++; |
| 4667 | if (status & SR_RXOVERRUN) |
| 4668 | portp->stats.rxoverrun++; |
| 4669 | if (status & SR_RXBREAK) |
| 4670 | portp->stats.rxbreaks++; |
| 4671 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4672 | if ((tty != NULL) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4673 | ((portp->rxignoremsk & status) == 0)) { |
| 4674 | if (portp->rxmarkmsk & status) { |
| 4675 | if (status & SR_RXBREAK) { |
| 4676 | status = TTY_BREAK; |
| 4677 | if (portp->flags & ASYNC_SAK) { |
| 4678 | do_SAK(tty); |
| 4679 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4680 | } |
| 4681 | } else if (status & SR_RXPARITY) { |
| 4682 | status = TTY_PARITY; |
| 4683 | } else if (status & SR_RXFRAMING) { |
| 4684 | status = TTY_FRAME; |
| 4685 | } else if(status & SR_RXOVERRUN) { |
| 4686 | status = TTY_OVERRUN; |
| 4687 | } else { |
| 4688 | status = 0; |
| 4689 | } |
| 4690 | } else { |
| 4691 | status = 0; |
| 4692 | } |
| 4693 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4694 | tty_insert_flip_char(tty, ch, status); |
| 4695 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4696 | |
| 4697 | if (status == 0) |
| 4698 | portp->stats.rxtotal++; |
| 4699 | } |
| 4700 | } |
| 4701 | |
| 4702 | /*****************************************************************************/ |
| 4703 | |
| 4704 | /* |
| 4705 | * Process all characters in the RX FIFO of the UART. Check all char |
| 4706 | * status bytes as well, and process as required. We need to check |
| 4707 | * all bytes in the FIFO, in case some more enter the FIFO while we |
| 4708 | * are here. To get the exact character error type we need to switch |
| 4709 | * into CHAR error mode (that is why we need to make sure we empty |
| 4710 | * the FIFO). |
| 4711 | */ |
| 4712 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4713 | static void stl_sc26198rxbadchars(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4714 | { |
| 4715 | unsigned char status, mr1; |
| 4716 | char ch; |
| 4717 | |
| 4718 | /* |
| 4719 | * To get the precise error type for each character we must switch |
| 4720 | * back into CHAR error mode. |
| 4721 | */ |
| 4722 | mr1 = stl_sc26198getreg(portp, MR1); |
| 4723 | stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); |
| 4724 | |
| 4725 | while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { |
| 4726 | stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); |
| 4727 | ch = stl_sc26198getreg(portp, RXFIFO); |
| 4728 | stl_sc26198rxbadch(portp, status, ch); |
| 4729 | } |
| 4730 | |
| 4731 | /* |
| 4732 | * To get correct interrupt class we must switch back into BLOCK |
| 4733 | * error mode. |
| 4734 | */ |
| 4735 | stl_sc26198setreg(portp, MR1, mr1); |
| 4736 | } |
| 4737 | |
| 4738 | /*****************************************************************************/ |
| 4739 | |
| 4740 | /* |
| 4741 | * Other interrupt handler. This includes modem signals, flow |
| 4742 | * control actions, etc. Most stuff is left to off-level interrupt |
| 4743 | * processing time. |
| 4744 | */ |
| 4745 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4746 | static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4747 | { |
| 4748 | unsigned char cir, ipr, xisr; |
| 4749 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4750 | pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4751 | |
| 4752 | cir = stl_sc26198getglobreg(portp, CIR); |
| 4753 | |
| 4754 | switch (cir & CIR_SUBTYPEMASK) { |
| 4755 | case CIR_SUBCOS: |
| 4756 | ipr = stl_sc26198getreg(portp, IPR); |
| 4757 | if (ipr & IPR_DCDCHANGE) { |
| 4758 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
| 4759 | schedule_work(&portp->tqueue); |
| 4760 | portp->stats.modem++; |
| 4761 | } |
| 4762 | break; |
| 4763 | case CIR_SUBXONXOFF: |
| 4764 | xisr = stl_sc26198getreg(portp, XISR); |
| 4765 | if (xisr & XISR_RXXONGOT) { |
| 4766 | set_bit(ASYI_TXFLOWED, &portp->istate); |
| 4767 | portp->stats.txxoff++; |
| 4768 | } |
| 4769 | if (xisr & XISR_RXXOFFGOT) { |
| 4770 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
| 4771 | portp->stats.txxon++; |
| 4772 | } |
| 4773 | break; |
| 4774 | case CIR_SUBBREAK: |
| 4775 | stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); |
| 4776 | stl_sc26198rxbadchars(portp); |
| 4777 | break; |
| 4778 | default: |
| 4779 | break; |
| 4780 | } |
| 4781 | } |
| 4782 | |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4783 | /* |
| 4784 | * Loadable module initialization stuff. |
| 4785 | */ |
| 4786 | static int __init stallion_module_init(void) |
| 4787 | { |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 4788 | unsigned int i, retval; |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4789 | |
| 4790 | printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); |
| 4791 | |
| 4792 | spin_lock_init(&stallion_lock); |
| 4793 | spin_lock_init(&brd_lock); |
| 4794 | |
| 4795 | stl_initbrds(); |
| 4796 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 4797 | retval = pci_register_driver(&stl_pcidriver); |
| 4798 | if (retval) |
| 4799 | goto err; |
| 4800 | |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4801 | stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); |
| 4802 | if (!stl_serial) |
| 4803 | return -1; |
| 4804 | |
| 4805 | /* |
| 4806 | * Set up a character driver for per board stuff. This is mainly used |
| 4807 | * to do stats ioctls on the ports. |
| 4808 | */ |
| 4809 | if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) |
| 4810 | printk("STALLION: failed to register serial board device\n"); |
| 4811 | |
| 4812 | stallion_class = class_create(THIS_MODULE, "staliomem"); |
| 4813 | for (i = 0; i < 4; i++) |
| 4814 | class_device_create(stallion_class, NULL, |
| 4815 | MKDEV(STL_SIOMEMMAJOR, i), NULL, |
| 4816 | "staliomem%d", i); |
| 4817 | |
| 4818 | stl_serial->owner = THIS_MODULE; |
| 4819 | stl_serial->driver_name = stl_drvname; |
| 4820 | stl_serial->name = "ttyE"; |
| 4821 | stl_serial->major = STL_SERIALMAJOR; |
| 4822 | stl_serial->minor_start = 0; |
| 4823 | stl_serial->type = TTY_DRIVER_TYPE_SERIAL; |
| 4824 | stl_serial->subtype = SERIAL_TYPE_NORMAL; |
| 4825 | stl_serial->init_termios = stl_deftermios; |
| 4826 | stl_serial->flags = TTY_DRIVER_REAL_RAW; |
| 4827 | tty_set_operations(stl_serial, &stl_ops); |
| 4828 | |
| 4829 | if (tty_register_driver(stl_serial)) { |
| 4830 | put_tty_driver(stl_serial); |
| 4831 | printk("STALLION: failed to register serial driver\n"); |
| 4832 | return -1; |
| 4833 | } |
| 4834 | |
| 4835 | return 0; |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 4836 | err: |
| 4837 | return retval; |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4838 | } |
| 4839 | |
| 4840 | static void __exit stallion_module_exit(void) |
| 4841 | { |
| 4842 | struct stlbrd *brdp; |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 4843 | int i; |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4844 | |
| 4845 | pr_debug("cleanup_module()\n"); |
| 4846 | |
| 4847 | printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, |
| 4848 | stl_drvversion); |
| 4849 | |
| 4850 | /* |
| 4851 | * Free up all allocated resources used by the ports. This includes |
| 4852 | * memory and interrupts. As part of this process we will also do |
| 4853 | * a hangup on every open port - to try to flush out any processes |
| 4854 | * hanging onto ports. |
| 4855 | */ |
| 4856 | i = tty_unregister_driver(stl_serial); |
| 4857 | put_tty_driver(stl_serial); |
| 4858 | if (i) { |
| 4859 | printk("STALLION: failed to un-register tty driver, " |
| 4860 | "errno=%d\n", -i); |
| 4861 | return; |
| 4862 | } |
| 4863 | for (i = 0; i < 4; i++) |
| 4864 | class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); |
| 4865 | if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) |
| 4866 | printk("STALLION: failed to un-register serial memory device, " |
| 4867 | "errno=%d\n", -i); |
| 4868 | class_destroy(stallion_class); |
| 4869 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 4870 | pci_unregister_driver(&stl_pcidriver); |
| 4871 | |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4872 | for (i = 0; (i < stl_nrbrds); i++) { |
| 4873 | if ((brdp = stl_brds[i]) == NULL) |
| 4874 | continue; |
| 4875 | |
| 4876 | free_irq(brdp->irq, brdp); |
| 4877 | |
Jiri Slaby | b1b84fe | 2006-12-08 02:39:09 -0800 | [diff] [blame^] | 4878 | stl_cleanup_panels(brdp); |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4879 | |
| 4880 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 4881 | if (brdp->iosize2 > 0) |
| 4882 | release_region(brdp->ioaddr2, brdp->iosize2); |
| 4883 | |
| 4884 | kfree(brdp); |
| 4885 | stl_brds[i] = NULL; |
| 4886 | } |
| 4887 | } |
| 4888 | |
| 4889 | module_init(stallion_module_init); |
| 4890 | module_exit(stallion_module_exit); |
| 4891 | |
| 4892 | MODULE_AUTHOR("Greg Ungerer"); |
| 4893 | MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); |
| 4894 | MODULE_LICENSE("GPL"); |