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 | |
| 384 | #ifdef CONFIG_PCI |
| 385 | |
| 386 | /* |
| 387 | * Define the Stallion PCI vendor and device IDs. |
| 388 | */ |
| 389 | #ifndef PCI_VENDOR_ID_STALLION |
| 390 | #define PCI_VENDOR_ID_STALLION 0x124d |
| 391 | #endif |
| 392 | #ifndef PCI_DEVICE_ID_ECHPCI832 |
| 393 | #define PCI_DEVICE_ID_ECHPCI832 0x0000 |
| 394 | #endif |
| 395 | #ifndef PCI_DEVICE_ID_ECHPCI864 |
| 396 | #define PCI_DEVICE_ID_ECHPCI864 0x0002 |
| 397 | #endif |
| 398 | #ifndef PCI_DEVICE_ID_EIOPCI |
| 399 | #define PCI_DEVICE_ID_EIOPCI 0x0003 |
| 400 | #endif |
| 401 | |
| 402 | /* |
| 403 | * Define structure to hold all Stallion PCI boards. |
| 404 | */ |
| 405 | typedef struct stlpcibrd { |
| 406 | unsigned short vendid; |
| 407 | unsigned short devid; |
| 408 | int brdtype; |
| 409 | } stlpcibrd_t; |
| 410 | |
| 411 | static stlpcibrd_t stl_pcibrds[] = { |
| 412 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI }, |
| 413 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI }, |
| 414 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI }, |
| 415 | { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI }, |
| 416 | }; |
| 417 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 418 | static int stl_nrpcibrds = ARRAY_SIZE(stl_pcibrds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
| 420 | #endif |
| 421 | |
| 422 | /*****************************************************************************/ |
| 423 | |
| 424 | /* |
| 425 | * Define macros to extract a brd/port number from a minor number. |
| 426 | */ |
| 427 | #define MINOR2BRD(min) (((min) & 0xc0) >> 6) |
| 428 | #define MINOR2PORT(min) ((min) & 0x3f) |
| 429 | |
| 430 | /* |
| 431 | * Define a baud rate table that converts termios baud rate selector |
| 432 | * into the actual baud rate value. All baud rate calculations are |
| 433 | * based on the actual baud rate required. |
| 434 | */ |
| 435 | static unsigned int stl_baudrates[] = { |
| 436 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, |
| 437 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 |
| 438 | }; |
| 439 | |
| 440 | /* |
| 441 | * Define some handy local macros... |
| 442 | */ |
| 443 | #undef MIN |
| 444 | #define MIN(a,b) (((a) <= (b)) ? (a) : (b)) |
| 445 | |
| 446 | #undef TOLOWER |
| 447 | #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x)) |
| 448 | |
| 449 | /*****************************************************************************/ |
| 450 | |
| 451 | /* |
| 452 | * Declare all those functions in this driver! |
| 453 | */ |
| 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | 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] | 456 | static int stl_brdinit(struct stlbrd *brdp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 457 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp); |
| 458 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 459 | static int stl_waitcarrier(struct stlport *portp, struct file *filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | /* |
| 462 | * CD1400 uart specific handling functions. |
| 463 | */ |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 464 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value); |
| 465 | static int stl_cd1400getreg(struct stlport *portp, int regnr); |
| 466 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value); |
| 467 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp); |
| 468 | 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] | 469 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 470 | static int stl_cd1400getsignals(struct stlport *portp); |
| 471 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts); |
| 472 | static void stl_cd1400ccrwait(struct stlport *portp); |
| 473 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx); |
| 474 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx); |
| 475 | static void stl_cd1400disableintrs(struct stlport *portp); |
| 476 | static void stl_cd1400sendbreak(struct stlport *portp, int len); |
| 477 | static void stl_cd1400flowctrl(struct stlport *portp, int state); |
| 478 | static void stl_cd1400sendflow(struct stlport *portp, int state); |
| 479 | static void stl_cd1400flush(struct stlport *portp); |
| 480 | static int stl_cd1400datastate(struct stlport *portp); |
| 481 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase); |
| 482 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase); |
| 483 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr); |
| 484 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr); |
| 485 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 487 | static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
| 489 | /* |
| 490 | * SC26198 uart specific handling functions. |
| 491 | */ |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 492 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value); |
| 493 | static int stl_sc26198getreg(struct stlport *portp, int regnr); |
| 494 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value); |
| 495 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr); |
| 496 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp); |
| 497 | 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] | 498 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 499 | static int stl_sc26198getsignals(struct stlport *portp); |
| 500 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts); |
| 501 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx); |
| 502 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx); |
| 503 | static void stl_sc26198disableintrs(struct stlport *portp); |
| 504 | static void stl_sc26198sendbreak(struct stlport *portp, int len); |
| 505 | static void stl_sc26198flowctrl(struct stlport *portp, int state); |
| 506 | static void stl_sc26198sendflow(struct stlport *portp, int state); |
| 507 | static void stl_sc26198flush(struct stlport *portp); |
| 508 | static int stl_sc26198datastate(struct stlport *portp); |
| 509 | static void stl_sc26198wait(struct stlport *portp); |
| 510 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty); |
| 511 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase); |
| 512 | static void stl_sc26198txisr(struct stlport *port); |
| 513 | static void stl_sc26198rxisr(struct stlport *port, unsigned int iack); |
| 514 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch); |
| 515 | static void stl_sc26198rxbadchars(struct stlport *portp); |
| 516 | static void stl_sc26198otherisr(struct stlport *port, unsigned int iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | /*****************************************************************************/ |
| 519 | |
| 520 | /* |
| 521 | * Generic UART support structure. |
| 522 | */ |
| 523 | typedef struct uart { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 524 | int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp); |
| 525 | void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp); |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 526 | void (*setport)(struct stlport *portp, struct ktermios *tiosp); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 527 | int (*getsignals)(struct stlport *portp); |
| 528 | void (*setsignals)(struct stlport *portp, int dtr, int rts); |
| 529 | void (*enablerxtx)(struct stlport *portp, int rx, int tx); |
| 530 | void (*startrxtx)(struct stlport *portp, int rx, int tx); |
| 531 | void (*disableintrs)(struct stlport *portp); |
| 532 | void (*sendbreak)(struct stlport *portp, int len); |
| 533 | void (*flowctrl)(struct stlport *portp, int state); |
| 534 | void (*sendflow)(struct stlport *portp, int state); |
| 535 | void (*flush)(struct stlport *portp); |
| 536 | int (*datastate)(struct stlport *portp); |
| 537 | void (*intr)(struct stlpanel *panelp, unsigned int iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | } uart_t; |
| 539 | |
| 540 | /* |
| 541 | * Define some macros to make calling these functions nice and clean. |
| 542 | */ |
| 543 | #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) |
| 544 | #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) |
| 545 | #define stl_setport (* ((uart_t *) portp->uartp)->setport) |
| 546 | #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) |
| 547 | #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) |
| 548 | #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) |
| 549 | #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) |
| 550 | #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) |
| 551 | #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) |
| 552 | #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) |
| 553 | #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) |
| 554 | #define stl_flush (* ((uart_t *) portp->uartp)->flush) |
| 555 | #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) |
| 556 | |
| 557 | /*****************************************************************************/ |
| 558 | |
| 559 | /* |
| 560 | * CD1400 UART specific data initialization. |
| 561 | */ |
| 562 | static uart_t stl_cd1400uart = { |
| 563 | stl_cd1400panelinit, |
| 564 | stl_cd1400portinit, |
| 565 | stl_cd1400setport, |
| 566 | stl_cd1400getsignals, |
| 567 | stl_cd1400setsignals, |
| 568 | stl_cd1400enablerxtx, |
| 569 | stl_cd1400startrxtx, |
| 570 | stl_cd1400disableintrs, |
| 571 | stl_cd1400sendbreak, |
| 572 | stl_cd1400flowctrl, |
| 573 | stl_cd1400sendflow, |
| 574 | stl_cd1400flush, |
| 575 | stl_cd1400datastate, |
| 576 | stl_cd1400eiointr |
| 577 | }; |
| 578 | |
| 579 | /* |
| 580 | * Define the offsets within the register bank of a cd1400 based panel. |
| 581 | * These io address offsets are common to the EasyIO board as well. |
| 582 | */ |
| 583 | #define EREG_ADDR 0 |
| 584 | #define EREG_DATA 4 |
| 585 | #define EREG_RXACK 5 |
| 586 | #define EREG_TXACK 6 |
| 587 | #define EREG_MDACK 7 |
| 588 | |
| 589 | #define EREG_BANKSIZE 8 |
| 590 | |
| 591 | #define CD1400_CLK 25000000 |
| 592 | #define CD1400_CLK8M 20000000 |
| 593 | |
| 594 | /* |
| 595 | * Define the cd1400 baud rate clocks. These are used when calculating |
| 596 | * what clock and divisor to use for the required baud rate. Also |
| 597 | * define the maximum baud rate allowed, and the default base baud. |
| 598 | */ |
| 599 | static int stl_cd1400clkdivs[] = { |
| 600 | CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 |
| 601 | }; |
| 602 | |
| 603 | /*****************************************************************************/ |
| 604 | |
| 605 | /* |
| 606 | * SC26198 UART specific data initization. |
| 607 | */ |
| 608 | static uart_t stl_sc26198uart = { |
| 609 | stl_sc26198panelinit, |
| 610 | stl_sc26198portinit, |
| 611 | stl_sc26198setport, |
| 612 | stl_sc26198getsignals, |
| 613 | stl_sc26198setsignals, |
| 614 | stl_sc26198enablerxtx, |
| 615 | stl_sc26198startrxtx, |
| 616 | stl_sc26198disableintrs, |
| 617 | stl_sc26198sendbreak, |
| 618 | stl_sc26198flowctrl, |
| 619 | stl_sc26198sendflow, |
| 620 | stl_sc26198flush, |
| 621 | stl_sc26198datastate, |
| 622 | stl_sc26198intr |
| 623 | }; |
| 624 | |
| 625 | /* |
| 626 | * Define the offsets within the register bank of a sc26198 based panel. |
| 627 | */ |
| 628 | #define XP_DATA 0 |
| 629 | #define XP_ADDR 1 |
| 630 | #define XP_MODID 2 |
| 631 | #define XP_STATUS 2 |
| 632 | #define XP_IACK 3 |
| 633 | |
| 634 | #define XP_BANKSIZE 4 |
| 635 | |
| 636 | /* |
| 637 | * Define the sc26198 baud rate table. Offsets within the table |
| 638 | * represent the actual baud rate selector of sc26198 registers. |
| 639 | */ |
| 640 | static unsigned int sc26198_baudtable[] = { |
| 641 | 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, |
| 642 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, |
| 643 | 230400, 460800, 921600 |
| 644 | }; |
| 645 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 646 | #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
| 648 | /*****************************************************************************/ |
| 649 | |
| 650 | /* |
| 651 | * Define the driver info for a user level control device. Used mainly |
| 652 | * to get at port stats - only not using the port device itself. |
| 653 | */ |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 654 | static const struct file_operations stl_fsiomem = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | .owner = THIS_MODULE, |
| 656 | .ioctl = stl_memioctl, |
| 657 | }; |
| 658 | |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 659 | static struct class *stallion_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | |
| 661 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | * Check for any arguments passed in on the module load command line. |
| 663 | */ |
| 664 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | /*****************************************************************************/ |
| 666 | |
| 667 | /* |
| 668 | * Convert an ascii string number into an unsigned long. |
| 669 | */ |
| 670 | |
| 671 | static unsigned long stl_atol(char *str) |
| 672 | { |
| 673 | unsigned long val; |
| 674 | int base, c; |
| 675 | char *sp; |
| 676 | |
| 677 | val = 0; |
| 678 | sp = str; |
| 679 | if ((*sp == '0') && (*(sp+1) == 'x')) { |
| 680 | base = 16; |
| 681 | sp += 2; |
| 682 | } else if (*sp == '0') { |
| 683 | base = 8; |
| 684 | sp++; |
| 685 | } else { |
| 686 | base = 10; |
| 687 | } |
| 688 | |
| 689 | for (; (*sp != 0); sp++) { |
| 690 | c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0'); |
| 691 | if ((c < 0) || (c >= base)) { |
| 692 | printk("STALLION: invalid argument %s\n", str); |
| 693 | val = 0; |
| 694 | break; |
| 695 | } |
| 696 | val = (val * base) + c; |
| 697 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 698 | return val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | } |
| 700 | |
| 701 | /*****************************************************************************/ |
| 702 | |
| 703 | /* |
| 704 | * Parse the supplied argument string, into the board conf struct. |
| 705 | */ |
| 706 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 707 | static int __init stl_parsebrd(struct stlconf *confp, char **argp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | { |
| 709 | char *sp; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 710 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 712 | pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 714 | if ((argp[0] == NULL) || (*argp[0] == 0)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 715 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
| 717 | for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) |
| 718 | *sp = TOLOWER(*sp); |
| 719 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 720 | for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | if (strcmp(stl_brdstr[i].name, argp[0]) == 0) |
| 722 | break; |
| 723 | } |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 724 | if (i == ARRAY_SIZE(stl_brdstr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | printk("STALLION: unknown board name, %s?\n", argp[0]); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 726 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | } |
| 728 | |
| 729 | confp->brdtype = stl_brdstr[i].type; |
| 730 | |
| 731 | i = 1; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 732 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | confp->ioaddr1 = stl_atol(argp[i]); |
| 734 | i++; |
| 735 | if (confp->brdtype == BRD_ECH) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 736 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | confp->ioaddr2 = stl_atol(argp[i]); |
| 738 | i++; |
| 739 | } |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 740 | if ((argp[i] != NULL) && (*argp[i] != 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | confp->irq = stl_atol(argp[i]); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 742 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | } |
| 744 | |
| 745 | /*****************************************************************************/ |
| 746 | |
| 747 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | * Allocate a new board structure. Fill out the basic info in it. |
| 749 | */ |
| 750 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 751 | static struct stlbrd *stl_allocbrd(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 753 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 755 | brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 756 | if (!brdp) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 757 | printk("STALLION: failed to allocate memory (size=%Zd)\n", |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 758 | sizeof(struct stlbrd)); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 759 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | } |
| 761 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | brdp->magic = STL_BOARDMAGIC; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 763 | return brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | } |
| 765 | |
Jiri Slaby | 96b066b | 2006-12-08 02:38:42 -0800 | [diff] [blame] | 766 | static void __init stl_argbrds(void) |
| 767 | { |
| 768 | struct stlconf conf; |
| 769 | struct stlbrd *brdp; |
| 770 | int i; |
| 771 | |
| 772 | pr_debug("stl_argbrds()\n"); |
| 773 | |
| 774 | for (i = stl_nrbrds; (i < stl_nargs); i++) { |
| 775 | memset(&conf, 0, sizeof(conf)); |
| 776 | if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) |
| 777 | continue; |
| 778 | if ((brdp = stl_allocbrd()) == NULL) |
| 779 | continue; |
| 780 | stl_nrbrds = i + 1; |
| 781 | brdp->brdnr = i; |
| 782 | brdp->brdtype = conf.brdtype; |
| 783 | brdp->ioaddr1 = conf.ioaddr1; |
| 784 | brdp->ioaddr2 = conf.ioaddr2; |
| 785 | brdp->irq = conf.irq; |
| 786 | brdp->irqtype = conf.irqtype; |
| 787 | stl_brdinit(brdp); |
| 788 | } |
| 789 | } |
| 790 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 791 | /*****************************************************************************/ |
| 792 | |
| 793 | static int stl_open(struct tty_struct *tty, struct file *filp) |
| 794 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 795 | struct stlport *portp; |
| 796 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | unsigned int minordev; |
| 798 | int brdnr, panelnr, portnr, rc; |
| 799 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 800 | 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] | 801 | |
| 802 | minordev = tty->index; |
| 803 | brdnr = MINOR2BRD(minordev); |
| 804 | if (brdnr >= stl_nrbrds) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 805 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 807 | if (brdp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 808 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | minordev = MINOR2PORT(minordev); |
| 810 | for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 811 | if (brdp->panels[panelnr] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | break; |
| 813 | if (minordev < brdp->panels[panelnr]->nrports) { |
| 814 | portnr = minordev; |
| 815 | break; |
| 816 | } |
| 817 | minordev -= brdp->panels[panelnr]->nrports; |
| 818 | } |
| 819 | if (portnr < 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 820 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | |
| 822 | portp = brdp->panels[panelnr]->ports[portnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 823 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 824 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
| 826 | /* |
| 827 | * On the first open of the device setup the port hardware, and |
| 828 | * initialize the per port data structure. |
| 829 | */ |
| 830 | portp->tty = tty; |
| 831 | tty->driver_data = portp; |
| 832 | portp->refcount++; |
| 833 | |
| 834 | if ((portp->flags & ASYNC_INITIALIZED) == 0) { |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 835 | if (!portp->tx.buf) { |
| 836 | portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); |
| 837 | if (!portp->tx.buf) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 838 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | portp->tx.head = portp->tx.buf; |
| 840 | portp->tx.tail = portp->tx.buf; |
| 841 | } |
| 842 | stl_setport(portp, tty->termios); |
| 843 | portp->sigs = stl_getsignals(portp); |
| 844 | stl_setsignals(portp, 1, 1); |
| 845 | stl_enablerxtx(portp, 1, 1); |
| 846 | stl_startrxtx(portp, 1, 0); |
| 847 | clear_bit(TTY_IO_ERROR, &tty->flags); |
| 848 | portp->flags |= ASYNC_INITIALIZED; |
| 849 | } |
| 850 | |
| 851 | /* |
| 852 | * Check if this port is in the middle of closing. If so then wait |
| 853 | * until it is closed then return error status, based on flag settings. |
| 854 | * The sleep here does not need interrupt protection since the wakeup |
| 855 | * for it is done with the same context. |
| 856 | */ |
| 857 | if (portp->flags & ASYNC_CLOSING) { |
| 858 | interruptible_sleep_on(&portp->close_wait); |
| 859 | if (portp->flags & ASYNC_HUP_NOTIFY) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 860 | return -EAGAIN; |
| 861 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | /* |
| 865 | * Based on type of open being done check if it can overlap with any |
| 866 | * previous opens still in effect. If we are a normal serial device |
| 867 | * then also we might have to wait for carrier. |
| 868 | */ |
| 869 | if (!(filp->f_flags & O_NONBLOCK)) { |
| 870 | if ((rc = stl_waitcarrier(portp, filp)) != 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 871 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | } |
| 873 | portp->flags |= ASYNC_NORMAL_ACTIVE; |
| 874 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 875 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | } |
| 877 | |
| 878 | /*****************************************************************************/ |
| 879 | |
| 880 | /* |
| 881 | * Possibly need to wait for carrier (DCD signal) to come high. Say |
| 882 | * maybe because if we are clocal then we don't need to wait... |
| 883 | */ |
| 884 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 885 | static int stl_waitcarrier(struct stlport *portp, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | { |
| 887 | unsigned long flags; |
| 888 | int rc, doclocal; |
| 889 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 890 | pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | |
| 892 | rc = 0; |
| 893 | doclocal = 0; |
| 894 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 895 | spin_lock_irqsave(&stallion_lock, flags); |
| 896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | if (portp->tty->termios->c_cflag & CLOCAL) |
| 898 | doclocal++; |
| 899 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | portp->openwaitcnt++; |
| 901 | if (! tty_hung_up_p(filp)) |
| 902 | portp->refcount--; |
| 903 | |
| 904 | for (;;) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 905 | /* Takes brd_lock internally */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | stl_setsignals(portp, 1, 1); |
| 907 | if (tty_hung_up_p(filp) || |
| 908 | ((portp->flags & ASYNC_INITIALIZED) == 0)) { |
| 909 | if (portp->flags & ASYNC_HUP_NOTIFY) |
| 910 | rc = -EBUSY; |
| 911 | else |
| 912 | rc = -ERESTARTSYS; |
| 913 | break; |
| 914 | } |
| 915 | if (((portp->flags & ASYNC_CLOSING) == 0) && |
| 916 | (doclocal || (portp->sigs & TIOCM_CD))) { |
| 917 | break; |
| 918 | } |
| 919 | if (signal_pending(current)) { |
| 920 | rc = -ERESTARTSYS; |
| 921 | break; |
| 922 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 923 | /* FIXME */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | interruptible_sleep_on(&portp->open_wait); |
| 925 | } |
| 926 | |
| 927 | if (! tty_hung_up_p(filp)) |
| 928 | portp->refcount++; |
| 929 | portp->openwaitcnt--; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 930 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 932 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | /*****************************************************************************/ |
| 936 | |
Jiri Slaby | 96b066b | 2006-12-08 02:38:42 -0800 | [diff] [blame] | 937 | static void stl_flushbuffer(struct tty_struct *tty) |
| 938 | { |
| 939 | struct stlport *portp; |
| 940 | |
| 941 | pr_debug("stl_flushbuffer(tty=%p)\n", tty); |
| 942 | |
| 943 | if (tty == NULL) |
| 944 | return; |
| 945 | portp = tty->driver_data; |
| 946 | if (portp == NULL) |
| 947 | return; |
| 948 | |
| 949 | stl_flush(portp); |
| 950 | tty_wakeup(tty); |
| 951 | } |
| 952 | |
| 953 | /*****************************************************************************/ |
| 954 | |
| 955 | static void stl_waituntilsent(struct tty_struct *tty, int timeout) |
| 956 | { |
| 957 | struct stlport *portp; |
| 958 | unsigned long tend; |
| 959 | |
| 960 | pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout); |
| 961 | |
| 962 | if (tty == NULL) |
| 963 | return; |
| 964 | portp = tty->driver_data; |
| 965 | if (portp == NULL) |
| 966 | return; |
| 967 | |
| 968 | if (timeout == 0) |
| 969 | timeout = HZ; |
| 970 | tend = jiffies + timeout; |
| 971 | |
| 972 | while (stl_datastate(portp)) { |
| 973 | if (signal_pending(current)) |
| 974 | break; |
| 975 | msleep_interruptible(20); |
| 976 | if (time_after_eq(jiffies, tend)) |
| 977 | break; |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | /*****************************************************************************/ |
| 982 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | static void stl_close(struct tty_struct *tty, struct file *filp) |
| 984 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 985 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | unsigned long flags; |
| 987 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 988 | pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | |
| 990 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 991 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | return; |
| 993 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 994 | spin_lock_irqsave(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | if (tty_hung_up_p(filp)) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 996 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | return; |
| 998 | } |
| 999 | if ((tty->count == 1) && (portp->refcount != 1)) |
| 1000 | portp->refcount = 1; |
| 1001 | if (portp->refcount-- > 1) { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1002 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | return; |
| 1004 | } |
| 1005 | |
| 1006 | portp->refcount = 0; |
| 1007 | portp->flags |= ASYNC_CLOSING; |
| 1008 | |
| 1009 | /* |
| 1010 | * May want to wait for any data to drain before closing. The BUSY |
| 1011 | * flag keeps track of whether we are still sending or not - it is |
| 1012 | * very accurate for the cd1400, not quite so for the sc26198. |
| 1013 | * (The sc26198 has no "end-of-data" interrupt only empty FIFO) |
| 1014 | */ |
| 1015 | tty->closing = 1; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1016 | |
| 1017 | spin_unlock_irqrestore(&stallion_lock, flags); |
| 1018 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| 1020 | tty_wait_until_sent(tty, portp->closing_wait); |
| 1021 | stl_waituntilsent(tty, (HZ / 2)); |
| 1022 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1023 | |
| 1024 | spin_lock_irqsave(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | portp->flags &= ~ASYNC_INITIALIZED; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1026 | spin_unlock_irqrestore(&stallion_lock, flags); |
| 1027 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | stl_disableintrs(portp); |
| 1029 | if (tty->termios->c_cflag & HUPCL) |
| 1030 | stl_setsignals(portp, 0, 0); |
| 1031 | stl_enablerxtx(portp, 0, 0); |
| 1032 | stl_flushbuffer(tty); |
| 1033 | portp->istate = 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1034 | if (portp->tx.buf != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | kfree(portp->tx.buf); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1036 | portp->tx.buf = NULL; |
| 1037 | portp->tx.head = NULL; |
| 1038 | portp->tx.tail = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | } |
| 1040 | set_bit(TTY_IO_ERROR, &tty->flags); |
| 1041 | tty_ldisc_flush(tty); |
| 1042 | |
| 1043 | tty->closing = 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1044 | portp->tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | |
| 1046 | if (portp->openwaitcnt) { |
| 1047 | if (portp->close_delay) |
| 1048 | msleep_interruptible(jiffies_to_msecs(portp->close_delay)); |
| 1049 | wake_up_interruptible(&portp->open_wait); |
| 1050 | } |
| 1051 | |
| 1052 | portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 1053 | wake_up_interruptible(&portp->close_wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | /*****************************************************************************/ |
| 1057 | |
| 1058 | /* |
| 1059 | * Write routine. Take data and stuff it in to the TX ring queue. |
| 1060 | * If transmit interrupts are not running then start them. |
| 1061 | */ |
| 1062 | |
| 1063 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| 1064 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1065 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | unsigned int len, stlen; |
| 1067 | unsigned char *chbuf; |
| 1068 | char *head, *tail; |
| 1069 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1070 | 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] | 1071 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1073 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1074 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1075 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1076 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | |
| 1078 | /* |
| 1079 | * If copying direct from user space we must cater for page faults, |
| 1080 | * causing us to "sleep" here for a while. To handle this copy in all |
| 1081 | * the data we need now, into a local buffer. Then when we got it all |
| 1082 | * copy it into the TX buffer. |
| 1083 | */ |
| 1084 | chbuf = (unsigned char *) buf; |
| 1085 | |
| 1086 | head = portp->tx.head; |
| 1087 | tail = portp->tx.tail; |
| 1088 | if (head >= tail) { |
| 1089 | len = STL_TXBUFSIZE - (head - tail) - 1; |
| 1090 | stlen = STL_TXBUFSIZE - (head - portp->tx.buf); |
| 1091 | } else { |
| 1092 | len = tail - head - 1; |
| 1093 | stlen = len; |
| 1094 | } |
| 1095 | |
| 1096 | len = MIN(len, count); |
| 1097 | count = 0; |
| 1098 | while (len > 0) { |
| 1099 | stlen = MIN(len, stlen); |
| 1100 | memcpy(head, chbuf, stlen); |
| 1101 | len -= stlen; |
| 1102 | chbuf += stlen; |
| 1103 | count += stlen; |
| 1104 | head += stlen; |
| 1105 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { |
| 1106 | head = portp->tx.buf; |
| 1107 | stlen = tail - head; |
| 1108 | } |
| 1109 | } |
| 1110 | portp->tx.head = head; |
| 1111 | |
| 1112 | clear_bit(ASYI_TXLOW, &portp->istate); |
| 1113 | stl_startrxtx(portp, -1, 1); |
| 1114 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1115 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | } |
| 1117 | |
| 1118 | /*****************************************************************************/ |
| 1119 | |
| 1120 | static void stl_putchar(struct tty_struct *tty, unsigned char ch) |
| 1121 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1122 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | unsigned int len; |
| 1124 | char *head, *tail; |
| 1125 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1126 | pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1128 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | return; |
| 1130 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1131 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | return; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1133 | if (portp->tx.buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | return; |
| 1135 | |
| 1136 | head = portp->tx.head; |
| 1137 | tail = portp->tx.tail; |
| 1138 | |
| 1139 | len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); |
| 1140 | len--; |
| 1141 | |
| 1142 | if (len > 0) { |
| 1143 | *head++ = ch; |
| 1144 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 1145 | head = portp->tx.buf; |
| 1146 | } |
| 1147 | portp->tx.head = head; |
| 1148 | } |
| 1149 | |
| 1150 | /*****************************************************************************/ |
| 1151 | |
| 1152 | /* |
| 1153 | * If there are any characters in the buffer then make sure that TX |
| 1154 | * interrupts are on and get'em out. Normally used after the putchar |
| 1155 | * routine has been called. |
| 1156 | */ |
| 1157 | |
| 1158 | static void stl_flushchars(struct tty_struct *tty) |
| 1159 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1160 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1162 | pr_debug("stl_flushchars(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1164 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | return; |
| 1166 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1167 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | return; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1169 | if (portp->tx.buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | return; |
| 1171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | stl_startrxtx(portp, -1, 1); |
| 1173 | } |
| 1174 | |
| 1175 | /*****************************************************************************/ |
| 1176 | |
| 1177 | static int stl_writeroom(struct tty_struct *tty) |
| 1178 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1179 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | char *head, *tail; |
| 1181 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1182 | pr_debug("stl_writeroom(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1184 | if (tty == 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 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1187 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1188 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1189 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1190 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
| 1192 | head = portp->tx.head; |
| 1193 | tail = portp->tx.tail; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1194 | return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | } |
| 1196 | |
| 1197 | /*****************************************************************************/ |
| 1198 | |
| 1199 | /* |
| 1200 | * Return number of chars in the TX buffer. Normally we would just |
| 1201 | * calculate the number of chars in the buffer and return that, but if |
| 1202 | * the buffer is empty and TX interrupts are still on then we return |
| 1203 | * that the buffer still has 1 char in it. This way whoever called us |
| 1204 | * will not think that ALL chars have drained - since the UART still |
| 1205 | * must have some chars in it (we are busy after all). |
| 1206 | */ |
| 1207 | |
| 1208 | static int stl_charsinbuffer(struct tty_struct *tty) |
| 1209 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1210 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | unsigned int size; |
| 1212 | char *head, *tail; |
| 1213 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1214 | pr_debug("stl_charsinbuffer(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1216 | if (tty == 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 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1219 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1220 | return 0; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1221 | if (portp->tx.buf == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1222 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | |
| 1224 | head = portp->tx.head; |
| 1225 | tail = portp->tx.tail; |
| 1226 | size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 1227 | if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) |
| 1228 | size = 1; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1229 | return size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | } |
| 1231 | |
| 1232 | /*****************************************************************************/ |
| 1233 | |
| 1234 | /* |
| 1235 | * Generate the serial struct info. |
| 1236 | */ |
| 1237 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1238 | static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | { |
| 1240 | struct serial_struct sio; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1241 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1243 | pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | |
| 1245 | memset(&sio, 0, sizeof(struct serial_struct)); |
| 1246 | sio.line = portp->portnr; |
| 1247 | sio.port = portp->ioaddr; |
| 1248 | sio.flags = portp->flags; |
| 1249 | sio.baud_base = portp->baud_base; |
| 1250 | sio.close_delay = portp->close_delay; |
| 1251 | sio.closing_wait = portp->closing_wait; |
| 1252 | sio.custom_divisor = portp->custom_divisor; |
| 1253 | sio.hub6 = 0; |
| 1254 | if (portp->uartp == &stl_cd1400uart) { |
| 1255 | sio.type = PORT_CIRRUS; |
| 1256 | sio.xmit_fifo_size = CD1400_TXFIFOSIZE; |
| 1257 | } else { |
| 1258 | sio.type = PORT_UNKNOWN; |
| 1259 | sio.xmit_fifo_size = SC26198_TXFIFOSIZE; |
| 1260 | } |
| 1261 | |
| 1262 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1263 | if (brdp != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | sio.irq = brdp->irq; |
| 1265 | |
| 1266 | return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; |
| 1267 | } |
| 1268 | |
| 1269 | /*****************************************************************************/ |
| 1270 | |
| 1271 | /* |
| 1272 | * Set port according to the serial struct info. |
| 1273 | * At this point we do not do any auto-configure stuff, so we will |
| 1274 | * just quietly ignore any requests to change irq, etc. |
| 1275 | */ |
| 1276 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1277 | static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | { |
| 1279 | struct serial_struct sio; |
| 1280 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1281 | pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | |
| 1283 | if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) |
| 1284 | return -EFAULT; |
| 1285 | if (!capable(CAP_SYS_ADMIN)) { |
| 1286 | if ((sio.baud_base != portp->baud_base) || |
| 1287 | (sio.close_delay != portp->close_delay) || |
| 1288 | ((sio.flags & ~ASYNC_USR_MASK) != |
| 1289 | (portp->flags & ~ASYNC_USR_MASK))) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1290 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | } |
| 1292 | |
| 1293 | portp->flags = (portp->flags & ~ASYNC_USR_MASK) | |
| 1294 | (sio.flags & ASYNC_USR_MASK); |
| 1295 | portp->baud_base = sio.baud_base; |
| 1296 | portp->close_delay = sio.close_delay; |
| 1297 | portp->closing_wait = sio.closing_wait; |
| 1298 | portp->custom_divisor = sio.custom_divisor; |
| 1299 | stl_setport(portp, portp->tty->termios); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1300 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | } |
| 1302 | |
| 1303 | /*****************************************************************************/ |
| 1304 | |
| 1305 | static int stl_tiocmget(struct tty_struct *tty, struct file *file) |
| 1306 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1307 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1309 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1310 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1312 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1313 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1315 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | |
| 1317 | return stl_getsignals(portp); |
| 1318 | } |
| 1319 | |
| 1320 | static int stl_tiocmset(struct tty_struct *tty, struct file *file, |
| 1321 | unsigned int set, unsigned int clear) |
| 1322 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1323 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | int rts = -1, dtr = -1; |
| 1325 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1326 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1327 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1329 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1330 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1332 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1333 | |
| 1334 | if (set & TIOCM_RTS) |
| 1335 | rts = 1; |
| 1336 | if (set & TIOCM_DTR) |
| 1337 | dtr = 1; |
| 1338 | if (clear & TIOCM_RTS) |
| 1339 | rts = 0; |
| 1340 | if (clear & TIOCM_DTR) |
| 1341 | dtr = 0; |
| 1342 | |
| 1343 | stl_setsignals(portp, dtr, rts); |
| 1344 | return 0; |
| 1345 | } |
| 1346 | |
| 1347 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) |
| 1348 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1349 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | unsigned int ival; |
| 1351 | int rc; |
| 1352 | void __user *argp = (void __user *)arg; |
| 1353 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1354 | pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd, |
| 1355 | arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1357 | if (tty == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1358 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1360 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1361 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | |
| 1363 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
| 1364 | (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { |
| 1365 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1366 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | } |
| 1368 | |
| 1369 | rc = 0; |
| 1370 | |
| 1371 | switch (cmd) { |
| 1372 | case TIOCGSOFTCAR: |
| 1373 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), |
| 1374 | (unsigned __user *) argp); |
| 1375 | break; |
| 1376 | case TIOCSSOFTCAR: |
| 1377 | if (get_user(ival, (unsigned int __user *) arg)) |
| 1378 | return -EFAULT; |
| 1379 | tty->termios->c_cflag = |
| 1380 | (tty->termios->c_cflag & ~CLOCAL) | |
| 1381 | (ival ? CLOCAL : 0); |
| 1382 | break; |
| 1383 | case TIOCGSERIAL: |
| 1384 | rc = stl_getserial(portp, argp); |
| 1385 | break; |
| 1386 | case TIOCSSERIAL: |
| 1387 | rc = stl_setserial(portp, argp); |
| 1388 | break; |
| 1389 | case COM_GETPORTSTATS: |
| 1390 | rc = stl_getportstats(portp, argp); |
| 1391 | break; |
| 1392 | case COM_CLRPORTSTATS: |
| 1393 | rc = stl_clrportstats(portp, argp); |
| 1394 | break; |
| 1395 | case TIOCSERCONFIG: |
| 1396 | case TIOCSERGWILD: |
| 1397 | case TIOCSERSWILD: |
| 1398 | case TIOCSERGETLSR: |
| 1399 | case TIOCSERGSTRUCT: |
| 1400 | case TIOCSERGETMULTI: |
| 1401 | case TIOCSERSETMULTI: |
| 1402 | default: |
| 1403 | rc = -ENOIOCTLCMD; |
| 1404 | break; |
| 1405 | } |
| 1406 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1407 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | } |
| 1409 | |
| 1410 | /*****************************************************************************/ |
| 1411 | |
Jiri Slaby | 96b066b | 2006-12-08 02:38:42 -0800 | [diff] [blame] | 1412 | /* |
| 1413 | * Start the transmitter again. Just turn TX interrupts back on. |
| 1414 | */ |
| 1415 | |
| 1416 | static void stl_start(struct tty_struct *tty) |
| 1417 | { |
| 1418 | struct stlport *portp; |
| 1419 | |
| 1420 | pr_debug("stl_start(tty=%p)\n", tty); |
| 1421 | |
| 1422 | if (tty == NULL) |
| 1423 | return; |
| 1424 | portp = tty->driver_data; |
| 1425 | if (portp == NULL) |
| 1426 | return; |
| 1427 | stl_startrxtx(portp, -1, 1); |
| 1428 | } |
| 1429 | |
| 1430 | /*****************************************************************************/ |
| 1431 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1432 | static void stl_settermios(struct tty_struct *tty, struct ktermios *old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1434 | struct stlport *portp; |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 1435 | struct ktermios *tiosp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1437 | pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1439 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | return; |
| 1441 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1442 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | return; |
| 1444 | |
| 1445 | tiosp = tty->termios; |
| 1446 | if ((tiosp->c_cflag == old->c_cflag) && |
| 1447 | (tiosp->c_iflag == old->c_iflag)) |
| 1448 | return; |
| 1449 | |
| 1450 | stl_setport(portp, tiosp); |
| 1451 | stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), |
| 1452 | -1); |
| 1453 | if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { |
| 1454 | tty->hw_stopped = 0; |
| 1455 | stl_start(tty); |
| 1456 | } |
| 1457 | if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) |
| 1458 | wake_up_interruptible(&portp->open_wait); |
| 1459 | } |
| 1460 | |
| 1461 | /*****************************************************************************/ |
| 1462 | |
| 1463 | /* |
| 1464 | * Attempt to flow control who ever is sending us data. Based on termios |
| 1465 | * settings use software or/and hardware flow control. |
| 1466 | */ |
| 1467 | |
| 1468 | static void stl_throttle(struct tty_struct *tty) |
| 1469 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1470 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1472 | pr_debug("stl_throttle(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1474 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | return; |
| 1476 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1477 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | return; |
| 1479 | stl_flowctrl(portp, 0); |
| 1480 | } |
| 1481 | |
| 1482 | /*****************************************************************************/ |
| 1483 | |
| 1484 | /* |
| 1485 | * Unflow control the device sending us data... |
| 1486 | */ |
| 1487 | |
| 1488 | static void stl_unthrottle(struct tty_struct *tty) |
| 1489 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1490 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1492 | pr_debug("stl_unthrottle(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1494 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | return; |
| 1496 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1497 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | return; |
| 1499 | stl_flowctrl(portp, 1); |
| 1500 | } |
| 1501 | |
| 1502 | /*****************************************************************************/ |
| 1503 | |
| 1504 | /* |
| 1505 | * Stop the transmitter. Basically to do this we will just turn TX |
| 1506 | * interrupts off. |
| 1507 | */ |
| 1508 | |
| 1509 | static void stl_stop(struct tty_struct *tty) |
| 1510 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1511 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1513 | pr_debug("stl_stop(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1515 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | return; |
| 1517 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1518 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | return; |
| 1520 | stl_startrxtx(portp, -1, 0); |
| 1521 | } |
| 1522 | |
| 1523 | /*****************************************************************************/ |
| 1524 | |
| 1525 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | * Hangup this port. This is pretty much like closing the port, only |
| 1527 | * a little more brutal. No waiting for data to drain. Shutdown the |
| 1528 | * port and maybe drop signals. |
| 1529 | */ |
| 1530 | |
| 1531 | static void stl_hangup(struct tty_struct *tty) |
| 1532 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1533 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1535 | pr_debug("stl_hangup(tty=%p)\n", tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1537 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | return; |
| 1539 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1540 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | return; |
| 1542 | |
| 1543 | portp->flags &= ~ASYNC_INITIALIZED; |
| 1544 | stl_disableintrs(portp); |
| 1545 | if (tty->termios->c_cflag & HUPCL) |
| 1546 | stl_setsignals(portp, 0, 0); |
| 1547 | stl_enablerxtx(portp, 0, 0); |
| 1548 | stl_flushbuffer(tty); |
| 1549 | portp->istate = 0; |
| 1550 | set_bit(TTY_IO_ERROR, &tty->flags); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1551 | if (portp->tx.buf != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | kfree(portp->tx.buf); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1553 | portp->tx.buf = NULL; |
| 1554 | portp->tx.head = NULL; |
| 1555 | portp->tx.tail = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | } |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1557 | portp->tty = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1558 | portp->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 1559 | portp->refcount = 0; |
| 1560 | wake_up_interruptible(&portp->open_wait); |
| 1561 | } |
| 1562 | |
| 1563 | /*****************************************************************************/ |
| 1564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | static void stl_breakctl(struct tty_struct *tty, int state) |
| 1566 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1567 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1569 | pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1571 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | return; |
| 1573 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1574 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | return; |
| 1576 | |
| 1577 | stl_sendbreak(portp, ((state == -1) ? 1 : 2)); |
| 1578 | } |
| 1579 | |
| 1580 | /*****************************************************************************/ |
| 1581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | static void stl_sendxchar(struct tty_struct *tty, char ch) |
| 1583 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1584 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1586 | pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1588 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | return; |
| 1590 | portp = tty->driver_data; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1591 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | return; |
| 1593 | |
| 1594 | if (ch == STOP_CHAR(tty)) |
| 1595 | stl_sendflow(portp, 0); |
| 1596 | else if (ch == START_CHAR(tty)) |
| 1597 | stl_sendflow(portp, 1); |
| 1598 | else |
| 1599 | stl_putchar(tty, ch); |
| 1600 | } |
| 1601 | |
| 1602 | /*****************************************************************************/ |
| 1603 | |
| 1604 | #define MAXLINE 80 |
| 1605 | |
| 1606 | /* |
| 1607 | * Format info for a specified port. The line is deliberately limited |
| 1608 | * to 80 characters. (If it is too long it will be truncated, if too |
| 1609 | * short then padded with spaces). |
| 1610 | */ |
| 1611 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1612 | static int stl_portinfo(struct stlport *portp, int portnr, char *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | { |
| 1614 | char *sp; |
| 1615 | int sigs, cnt; |
| 1616 | |
| 1617 | sp = pos; |
| 1618 | sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", |
| 1619 | portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", |
| 1620 | (int) portp->stats.txtotal, (int) portp->stats.rxtotal); |
| 1621 | |
| 1622 | if (portp->stats.rxframing) |
| 1623 | sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); |
| 1624 | if (portp->stats.rxparity) |
| 1625 | sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); |
| 1626 | if (portp->stats.rxbreaks) |
| 1627 | sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); |
| 1628 | if (portp->stats.rxoverrun) |
| 1629 | sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); |
| 1630 | |
| 1631 | sigs = stl_getsignals(portp); |
| 1632 | cnt = sprintf(sp, "%s%s%s%s%s ", |
| 1633 | (sigs & TIOCM_RTS) ? "|RTS" : "", |
| 1634 | (sigs & TIOCM_CTS) ? "|CTS" : "", |
| 1635 | (sigs & TIOCM_DTR) ? "|DTR" : "", |
| 1636 | (sigs & TIOCM_CD) ? "|DCD" : "", |
| 1637 | (sigs & TIOCM_DSR) ? "|DSR" : ""); |
| 1638 | *sp = ' '; |
| 1639 | sp += cnt; |
| 1640 | |
| 1641 | for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) |
| 1642 | *sp++ = ' '; |
| 1643 | if (cnt >= MAXLINE) |
| 1644 | pos[(MAXLINE - 2)] = '+'; |
| 1645 | pos[(MAXLINE - 1)] = '\n'; |
| 1646 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1647 | return MAXLINE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | } |
| 1649 | |
| 1650 | /*****************************************************************************/ |
| 1651 | |
| 1652 | /* |
| 1653 | * Port info, read from the /proc file system. |
| 1654 | */ |
| 1655 | |
| 1656 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) |
| 1657 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1658 | struct stlbrd *brdp; |
| 1659 | struct stlpanel *panelp; |
| 1660 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | int brdnr, panelnr, portnr, totalport; |
| 1662 | int curoff, maxoff; |
| 1663 | char *pos; |
| 1664 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1665 | pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p," |
| 1666 | "data=%p\n", page, start, off, count, eof, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | |
| 1668 | pos = page; |
| 1669 | totalport = 0; |
| 1670 | curoff = 0; |
| 1671 | |
| 1672 | if (off == 0) { |
| 1673 | pos += sprintf(pos, "%s: version %s", stl_drvtitle, |
| 1674 | stl_drvversion); |
| 1675 | while (pos < (page + MAXLINE - 1)) |
| 1676 | *pos++ = ' '; |
| 1677 | *pos++ = '\n'; |
| 1678 | } |
| 1679 | curoff = MAXLINE; |
| 1680 | |
| 1681 | /* |
| 1682 | * We scan through for each board, panel and port. The offset is |
| 1683 | * calculated on the fly, and irrelevant ports are skipped. |
| 1684 | */ |
| 1685 | for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) { |
| 1686 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1687 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | continue; |
| 1689 | if (brdp->state == 0) |
| 1690 | continue; |
| 1691 | |
| 1692 | maxoff = curoff + (brdp->nrports * MAXLINE); |
| 1693 | if (off >= maxoff) { |
| 1694 | curoff = maxoff; |
| 1695 | continue; |
| 1696 | } |
| 1697 | |
| 1698 | totalport = brdnr * STL_MAXPORTS; |
| 1699 | for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { |
| 1700 | panelp = brdp->panels[panelnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1701 | if (panelp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | continue; |
| 1703 | |
| 1704 | maxoff = curoff + (panelp->nrports * MAXLINE); |
| 1705 | if (off >= maxoff) { |
| 1706 | curoff = maxoff; |
| 1707 | totalport += panelp->nrports; |
| 1708 | continue; |
| 1709 | } |
| 1710 | |
| 1711 | for (portnr = 0; (portnr < panelp->nrports); portnr++, |
| 1712 | totalport++) { |
| 1713 | portp = panelp->ports[portnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1714 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | continue; |
| 1716 | if (off >= (curoff += MAXLINE)) |
| 1717 | continue; |
| 1718 | if ((pos - page + MAXLINE) > count) |
| 1719 | goto stl_readdone; |
| 1720 | pos += stl_portinfo(portp, totalport, pos); |
| 1721 | } |
| 1722 | } |
| 1723 | } |
| 1724 | |
| 1725 | *eof = 1; |
| 1726 | |
| 1727 | stl_readdone: |
| 1728 | *start = page; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1729 | return (pos - page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | } |
| 1731 | |
| 1732 | /*****************************************************************************/ |
| 1733 | |
| 1734 | /* |
| 1735 | * All board interrupts are vectored through here first. This code then |
| 1736 | * calls off to the approrpriate board interrupt handlers. |
| 1737 | */ |
| 1738 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1739 | static irqreturn_t stl_intr(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1741 | struct stlbrd *brdp = dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1743 | pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | |
| 1745 | return IRQ_RETVAL((* brdp->isr)(brdp)); |
| 1746 | } |
| 1747 | |
| 1748 | /*****************************************************************************/ |
| 1749 | |
| 1750 | /* |
| 1751 | * Interrupt service routine for EasyIO board types. |
| 1752 | */ |
| 1753 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1754 | static int stl_eiointr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1756 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | unsigned int iobase; |
| 1758 | int handled = 0; |
| 1759 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1760 | spin_lock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | panelp = brdp->panels[0]; |
| 1762 | iobase = panelp->iobase; |
| 1763 | while (inb(brdp->iostatus) & EIO_INTRPEND) { |
| 1764 | handled = 1; |
| 1765 | (* panelp->isr)(panelp, iobase); |
| 1766 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 1767 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | return handled; |
| 1769 | } |
| 1770 | |
| 1771 | /*****************************************************************************/ |
| 1772 | |
| 1773 | /* |
| 1774 | * Interrupt service routine for ECH-AT board types. |
| 1775 | */ |
| 1776 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1777 | static int stl_echatintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1779 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | unsigned int ioaddr; |
| 1781 | int bnknr; |
| 1782 | int handled = 0; |
| 1783 | |
| 1784 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
| 1785 | |
| 1786 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
| 1787 | handled = 1; |
| 1788 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1789 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1790 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1791 | panelp = brdp->bnk2panel[bnknr]; |
| 1792 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1793 | } |
| 1794 | } |
| 1795 | } |
| 1796 | |
| 1797 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| 1798 | |
| 1799 | return handled; |
| 1800 | } |
| 1801 | |
| 1802 | /*****************************************************************************/ |
| 1803 | |
| 1804 | /* |
| 1805 | * Interrupt service routine for ECH-MCA board types. |
| 1806 | */ |
| 1807 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1808 | static int stl_echmcaintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1809 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1810 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | unsigned int ioaddr; |
| 1812 | int bnknr; |
| 1813 | int handled = 0; |
| 1814 | |
| 1815 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
| 1816 | handled = 1; |
| 1817 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1818 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1819 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1820 | panelp = brdp->bnk2panel[bnknr]; |
| 1821 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1822 | } |
| 1823 | } |
| 1824 | } |
| 1825 | return handled; |
| 1826 | } |
| 1827 | |
| 1828 | /*****************************************************************************/ |
| 1829 | |
| 1830 | /* |
| 1831 | * Interrupt service routine for ECH-PCI board types. |
| 1832 | */ |
| 1833 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1834 | static int stl_echpciintr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1836 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | unsigned int ioaddr; |
| 1838 | int bnknr, recheck; |
| 1839 | int handled = 0; |
| 1840 | |
| 1841 | while (1) { |
| 1842 | recheck = 0; |
| 1843 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1844 | outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); |
| 1845 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1846 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1847 | panelp = brdp->bnk2panel[bnknr]; |
| 1848 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1849 | recheck++; |
| 1850 | handled = 1; |
| 1851 | } |
| 1852 | } |
| 1853 | if (! recheck) |
| 1854 | break; |
| 1855 | } |
| 1856 | return handled; |
| 1857 | } |
| 1858 | |
| 1859 | /*****************************************************************************/ |
| 1860 | |
| 1861 | /* |
| 1862 | * Interrupt service routine for ECH-8/64-PCI board types. |
| 1863 | */ |
| 1864 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1865 | static int stl_echpci64intr(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1867 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | unsigned int ioaddr; |
| 1869 | int bnknr; |
| 1870 | int handled = 0; |
| 1871 | |
| 1872 | while (inb(brdp->ioctrl) & 0x1) { |
| 1873 | handled = 1; |
| 1874 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 1875 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 1876 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 1877 | panelp = brdp->bnk2panel[bnknr]; |
| 1878 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 1879 | } |
| 1880 | } |
| 1881 | } |
| 1882 | |
| 1883 | return handled; |
| 1884 | } |
| 1885 | |
| 1886 | /*****************************************************************************/ |
| 1887 | |
| 1888 | /* |
| 1889 | * Service an off-level request for some channel. |
| 1890 | */ |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 1891 | static void stl_offintr(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1893 | struct stlport *portp = container_of(work, struct stlport, tqueue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | struct tty_struct *tty; |
| 1895 | unsigned int oldsigs; |
| 1896 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1897 | pr_debug("stl_offintr(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1899 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | return; |
| 1901 | |
| 1902 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 1903 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | return; |
| 1905 | |
| 1906 | lock_kernel(); |
| 1907 | if (test_bit(ASYI_TXLOW, &portp->istate)) { |
| 1908 | tty_wakeup(tty); |
| 1909 | } |
| 1910 | if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { |
| 1911 | clear_bit(ASYI_DCDCHANGE, &portp->istate); |
| 1912 | oldsigs = portp->sigs; |
| 1913 | portp->sigs = stl_getsignals(portp); |
| 1914 | if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) |
| 1915 | wake_up_interruptible(&portp->open_wait); |
| 1916 | if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { |
| 1917 | if (portp->flags & ASYNC_CHECK_CD) |
| 1918 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ |
| 1919 | } |
| 1920 | } |
| 1921 | unlock_kernel(); |
| 1922 | } |
| 1923 | |
| 1924 | /*****************************************************************************/ |
| 1925 | |
| 1926 | /* |
| 1927 | * Initialize all the ports on a panel. |
| 1928 | */ |
| 1929 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1930 | static int __init stl_initports(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1932 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | int chipmask, i; |
| 1934 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1935 | pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | |
| 1937 | chipmask = stl_panelinit(brdp, panelp); |
| 1938 | |
| 1939 | /* |
| 1940 | * All UART's are initialized (if found!). Now go through and setup |
| 1941 | * each ports data structures. |
| 1942 | */ |
| 1943 | for (i = 0; (i < panelp->nrports); i++) { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1944 | portp = kzalloc(sizeof(struct stlport), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 1945 | if (!portp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | printk("STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1947 | "(size=%Zd)\n", sizeof(struct stlport)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | break; |
| 1949 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | |
| 1951 | portp->magic = STL_PORTMAGIC; |
| 1952 | portp->portnr = i; |
| 1953 | portp->brdnr = panelp->brdnr; |
| 1954 | portp->panelnr = panelp->panelnr; |
| 1955 | portp->uartp = panelp->uartp; |
| 1956 | portp->clk = brdp->clk; |
| 1957 | portp->baud_base = STL_BAUDBASE; |
| 1958 | portp->close_delay = STL_CLOSEDELAY; |
| 1959 | portp->closing_wait = 30 * HZ; |
Al Viro | 3e577a8 | 2006-12-06 18:41:45 +0000 | [diff] [blame] | 1960 | INIT_WORK(&portp->tqueue, stl_offintr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | init_waitqueue_head(&portp->open_wait); |
| 1962 | init_waitqueue_head(&portp->close_wait); |
| 1963 | portp->stats.brd = portp->brdnr; |
| 1964 | portp->stats.panel = portp->panelnr; |
| 1965 | portp->stats.port = portp->portnr; |
| 1966 | panelp->ports[i] = portp; |
| 1967 | stl_portinit(brdp, panelp, portp); |
| 1968 | } |
| 1969 | |
| 1970 | return(0); |
| 1971 | } |
| 1972 | |
| 1973 | /*****************************************************************************/ |
| 1974 | |
| 1975 | /* |
| 1976 | * Try to find and initialize an EasyIO board. |
| 1977 | */ |
| 1978 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 1979 | static int __init stl_initeio(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 1981 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | unsigned int status; |
| 1983 | char *name; |
| 1984 | int rc; |
| 1985 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 1986 | pr_debug("stl_initeio(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | |
| 1988 | brdp->ioctrl = brdp->ioaddr1 + 1; |
| 1989 | brdp->iostatus = brdp->ioaddr1 + 2; |
| 1990 | |
| 1991 | status = inb(brdp->iostatus); |
| 1992 | if ((status & EIO_IDBITMASK) == EIO_MK3) |
| 1993 | brdp->ioctrl++; |
| 1994 | |
| 1995 | /* |
| 1996 | * Handle board specific stuff now. The real difference is PCI |
| 1997 | * or not PCI. |
| 1998 | */ |
| 1999 | if (brdp->brdtype == BRD_EASYIOPCI) { |
| 2000 | brdp->iosize1 = 0x80; |
| 2001 | brdp->iosize2 = 0x80; |
| 2002 | name = "serial(EIO-PCI)"; |
| 2003 | outb(0x41, (brdp->ioaddr2 + 0x4c)); |
| 2004 | } else { |
| 2005 | brdp->iosize1 = 8; |
| 2006 | name = "serial(EIO)"; |
| 2007 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2008 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2009 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2010 | brdp->irq, brdp->brdnr); |
| 2011 | return(-EINVAL); |
| 2012 | } |
| 2013 | outb((stl_vecmap[brdp->irq] | EIO_0WS | |
| 2014 | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), |
| 2015 | brdp->ioctrl); |
| 2016 | } |
| 2017 | |
| 2018 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
| 2019 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
| 2020 | "%x conflicts with another device\n", brdp->brdnr, |
| 2021 | brdp->ioaddr1); |
| 2022 | return(-EBUSY); |
| 2023 | } |
| 2024 | |
| 2025 | if (brdp->iosize2 > 0) |
| 2026 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
| 2027 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
| 2028 | "address %x conflicts with another device\n", |
| 2029 | brdp->brdnr, brdp->ioaddr2); |
| 2030 | printk(KERN_WARNING "STALLION: Warning, also " |
| 2031 | "releasing board %d I/O address %x \n", |
| 2032 | brdp->brdnr, brdp->ioaddr1); |
| 2033 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2034 | return(-EBUSY); |
| 2035 | } |
| 2036 | |
| 2037 | /* |
| 2038 | * Everything looks OK, so let's go ahead and probe for the hardware. |
| 2039 | */ |
| 2040 | brdp->clk = CD1400_CLK; |
| 2041 | brdp->isr = stl_eiointr; |
| 2042 | |
| 2043 | switch (status & EIO_IDBITMASK) { |
| 2044 | case EIO_8PORTM: |
| 2045 | brdp->clk = CD1400_CLK8M; |
| 2046 | /* fall thru */ |
| 2047 | case EIO_8PORTRS: |
| 2048 | case EIO_8PORTDI: |
| 2049 | brdp->nrports = 8; |
| 2050 | break; |
| 2051 | case EIO_4PORTRS: |
| 2052 | brdp->nrports = 4; |
| 2053 | break; |
| 2054 | case EIO_MK3: |
| 2055 | switch (status & EIO_BRDMASK) { |
| 2056 | case ID_BRD4: |
| 2057 | brdp->nrports = 4; |
| 2058 | break; |
| 2059 | case ID_BRD8: |
| 2060 | brdp->nrports = 8; |
| 2061 | break; |
| 2062 | case ID_BRD16: |
| 2063 | brdp->nrports = 16; |
| 2064 | break; |
| 2065 | default: |
| 2066 | return(-ENODEV); |
| 2067 | } |
| 2068 | break; |
| 2069 | default: |
| 2070 | return(-ENODEV); |
| 2071 | } |
| 2072 | |
| 2073 | /* |
| 2074 | * We have verified that the board is actually present, so now we |
| 2075 | * can complete the setup. |
| 2076 | */ |
| 2077 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2078 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 2079 | if (!panelp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | printk(KERN_WARNING "STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2081 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 2082 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | |
| 2085 | panelp->magic = STL_PANELMAGIC; |
| 2086 | panelp->brdnr = brdp->brdnr; |
| 2087 | panelp->panelnr = 0; |
| 2088 | panelp->nrports = brdp->nrports; |
| 2089 | panelp->iobase = brdp->ioaddr1; |
| 2090 | panelp->hwid = status; |
| 2091 | if ((status & EIO_IDBITMASK) == EIO_MK3) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2092 | panelp->uartp = &stl_sc26198uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | panelp->isr = stl_sc26198intr; |
| 2094 | } else { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2095 | panelp->uartp = &stl_cd1400uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | panelp->isr = stl_cd1400eiointr; |
| 2097 | } |
| 2098 | |
| 2099 | brdp->panels[0] = panelp; |
| 2100 | brdp->nrpanels = 1; |
| 2101 | brdp->state |= BRD_FOUND; |
| 2102 | brdp->hwid = status; |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 2103 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | printk("STALLION: failed to register interrupt " |
| 2105 | "routine for %s irq=%d\n", name, brdp->irq); |
| 2106 | rc = -ENODEV; |
| 2107 | } else { |
| 2108 | rc = 0; |
| 2109 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2110 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | } |
| 2112 | |
| 2113 | /*****************************************************************************/ |
| 2114 | |
| 2115 | /* |
| 2116 | * Try to find an ECH board and initialize it. This code is capable of |
| 2117 | * dealing with all types of ECH board. |
| 2118 | */ |
| 2119 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 2120 | static int __init stl_initech(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2122 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | unsigned int status, nxtid, ioaddr, conflict; |
| 2124 | int panelnr, banknr, i; |
| 2125 | char *name; |
| 2126 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2127 | pr_debug("stl_initech(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | |
| 2129 | status = 0; |
| 2130 | conflict = 0; |
| 2131 | |
| 2132 | /* |
| 2133 | * Set up the initial board register contents for boards. This varies a |
| 2134 | * bit between the different board types. So we need to handle each |
| 2135 | * separately. Also do a check that the supplied IRQ is good. |
| 2136 | */ |
| 2137 | switch (brdp->brdtype) { |
| 2138 | |
| 2139 | case BRD_ECH: |
| 2140 | brdp->isr = stl_echatintr; |
| 2141 | brdp->ioctrl = brdp->ioaddr1 + 1; |
| 2142 | brdp->iostatus = brdp->ioaddr1 + 1; |
| 2143 | status = inb(brdp->iostatus); |
| 2144 | if ((status & ECH_IDBITMASK) != ECH_ID) |
| 2145 | return(-ENODEV); |
| 2146 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2147 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2148 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2149 | brdp->irq, brdp->brdnr); |
| 2150 | return(-EINVAL); |
| 2151 | } |
| 2152 | status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); |
| 2153 | status |= (stl_vecmap[brdp->irq] << 1); |
| 2154 | outb((status | ECH_BRDRESET), brdp->ioaddr1); |
| 2155 | brdp->ioctrlval = ECH_INTENABLE | |
| 2156 | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); |
| 2157 | for (i = 0; (i < 10); i++) |
| 2158 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
| 2159 | brdp->iosize1 = 2; |
| 2160 | brdp->iosize2 = 32; |
| 2161 | name = "serial(EC8/32)"; |
| 2162 | outb(status, brdp->ioaddr1); |
| 2163 | break; |
| 2164 | |
| 2165 | case BRD_ECHMC: |
| 2166 | brdp->isr = stl_echmcaintr; |
| 2167 | brdp->ioctrl = brdp->ioaddr1 + 0x20; |
| 2168 | brdp->iostatus = brdp->ioctrl; |
| 2169 | status = inb(brdp->iostatus); |
| 2170 | if ((status & ECH_IDBITMASK) != ECH_ID) |
| 2171 | return(-ENODEV); |
| 2172 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2173 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2174 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2175 | brdp->irq, brdp->brdnr); |
| 2176 | return(-EINVAL); |
| 2177 | } |
| 2178 | outb(ECHMC_BRDRESET, brdp->ioctrl); |
| 2179 | outb(ECHMC_INTENABLE, brdp->ioctrl); |
| 2180 | brdp->iosize1 = 64; |
| 2181 | name = "serial(EC8/32-MC)"; |
| 2182 | break; |
| 2183 | |
| 2184 | case BRD_ECHPCI: |
| 2185 | brdp->isr = stl_echpciintr; |
| 2186 | brdp->ioctrl = brdp->ioaddr1 + 2; |
| 2187 | brdp->iosize1 = 4; |
| 2188 | brdp->iosize2 = 8; |
| 2189 | name = "serial(EC8/32-PCI)"; |
| 2190 | break; |
| 2191 | |
| 2192 | case BRD_ECH64PCI: |
| 2193 | brdp->isr = stl_echpci64intr; |
| 2194 | brdp->ioctrl = brdp->ioaddr2 + 0x40; |
| 2195 | outb(0x43, (brdp->ioaddr1 + 0x4c)); |
| 2196 | brdp->iosize1 = 0x80; |
| 2197 | brdp->iosize2 = 0x80; |
| 2198 | name = "serial(EC8/64-PCI)"; |
| 2199 | break; |
| 2200 | |
| 2201 | default: |
| 2202 | printk("STALLION: unknown board type=%d\n", brdp->brdtype); |
| 2203 | return(-EINVAL); |
| 2204 | break; |
| 2205 | } |
| 2206 | |
| 2207 | /* |
| 2208 | * Check boards for possible IO address conflicts and return fail status |
| 2209 | * if an IO conflict found. |
| 2210 | */ |
| 2211 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
| 2212 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
| 2213 | "%x conflicts with another device\n", brdp->brdnr, |
| 2214 | brdp->ioaddr1); |
| 2215 | return(-EBUSY); |
| 2216 | } |
| 2217 | |
| 2218 | if (brdp->iosize2 > 0) |
| 2219 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
| 2220 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
| 2221 | "address %x conflicts with another device\n", |
| 2222 | brdp->brdnr, brdp->ioaddr2); |
| 2223 | printk(KERN_WARNING "STALLION: Warning, also " |
| 2224 | "releasing board %d I/O address %x \n", |
| 2225 | brdp->brdnr, brdp->ioaddr1); |
| 2226 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2227 | return(-EBUSY); |
| 2228 | } |
| 2229 | |
| 2230 | /* |
| 2231 | * Scan through the secondary io address space looking for panels. |
| 2232 | * As we find'em allocate and initialize panel structures for each. |
| 2233 | */ |
| 2234 | brdp->clk = CD1400_CLK; |
| 2235 | brdp->hwid = status; |
| 2236 | |
| 2237 | ioaddr = brdp->ioaddr2; |
| 2238 | banknr = 0; |
| 2239 | panelnr = 0; |
| 2240 | nxtid = 0; |
| 2241 | |
| 2242 | for (i = 0; (i < STL_MAXPANELS); i++) { |
| 2243 | if (brdp->brdtype == BRD_ECHPCI) { |
| 2244 | outb(nxtid, brdp->ioctrl); |
| 2245 | ioaddr = brdp->ioaddr2; |
| 2246 | } |
| 2247 | status = inb(ioaddr + ECH_PNLSTATUS); |
| 2248 | if ((status & ECH_PNLIDMASK) != nxtid) |
| 2249 | break; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2250 | panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame] | 2251 | if (!panelp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2252 | printk("STALLION: failed to allocate memory " |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2253 | "(size=%Zd)\n", sizeof(struct stlpanel)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | break; |
| 2255 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | panelp->magic = STL_PANELMAGIC; |
| 2257 | panelp->brdnr = brdp->brdnr; |
| 2258 | panelp->panelnr = panelnr; |
| 2259 | panelp->iobase = ioaddr; |
| 2260 | panelp->pagenr = nxtid; |
| 2261 | panelp->hwid = status; |
| 2262 | brdp->bnk2panel[banknr] = panelp; |
| 2263 | brdp->bnkpageaddr[banknr] = nxtid; |
| 2264 | brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; |
| 2265 | |
| 2266 | if (status & ECH_PNLXPID) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2267 | panelp->uartp = &stl_sc26198uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | panelp->isr = stl_sc26198intr; |
| 2269 | if (status & ECH_PNL16PORT) { |
| 2270 | panelp->nrports = 16; |
| 2271 | brdp->bnk2panel[banknr] = panelp; |
| 2272 | brdp->bnkpageaddr[banknr] = nxtid; |
| 2273 | brdp->bnkstataddr[banknr++] = ioaddr + 4 + |
| 2274 | ECH_PNLSTATUS; |
| 2275 | } else { |
| 2276 | panelp->nrports = 8; |
| 2277 | } |
| 2278 | } else { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2279 | panelp->uartp = &stl_cd1400uart; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | panelp->isr = stl_cd1400echintr; |
| 2281 | if (status & ECH_PNL16PORT) { |
| 2282 | panelp->nrports = 16; |
| 2283 | panelp->ackmask = 0x80; |
| 2284 | if (brdp->brdtype != BRD_ECHPCI) |
| 2285 | ioaddr += EREG_BANKSIZE; |
| 2286 | brdp->bnk2panel[banknr] = panelp; |
| 2287 | brdp->bnkpageaddr[banknr] = ++nxtid; |
| 2288 | brdp->bnkstataddr[banknr++] = ioaddr + |
| 2289 | ECH_PNLSTATUS; |
| 2290 | } else { |
| 2291 | panelp->nrports = 8; |
| 2292 | panelp->ackmask = 0xc0; |
| 2293 | } |
| 2294 | } |
| 2295 | |
| 2296 | nxtid++; |
| 2297 | ioaddr += EREG_BANKSIZE; |
| 2298 | brdp->nrports += panelp->nrports; |
| 2299 | brdp->panels[panelnr++] = panelp; |
| 2300 | if ((brdp->brdtype != BRD_ECHPCI) && |
| 2301 | (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) |
| 2302 | break; |
| 2303 | } |
| 2304 | |
| 2305 | brdp->nrpanels = panelnr; |
| 2306 | brdp->nrbnks = banknr; |
| 2307 | if (brdp->brdtype == BRD_ECH) |
| 2308 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| 2309 | |
| 2310 | brdp->state |= BRD_FOUND; |
Thomas Gleixner | 0f2ed4c | 2006-07-01 19:29:33 -0700 | [diff] [blame] | 2311 | if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | printk("STALLION: failed to register interrupt " |
| 2313 | "routine for %s irq=%d\n", name, brdp->irq); |
| 2314 | i = -ENODEV; |
| 2315 | } else { |
| 2316 | i = 0; |
| 2317 | } |
| 2318 | |
| 2319 | return(i); |
| 2320 | } |
| 2321 | |
| 2322 | /*****************************************************************************/ |
| 2323 | |
| 2324 | /* |
| 2325 | * Initialize and configure the specified board. |
| 2326 | * Scan through all the boards in the configuration and see what we |
| 2327 | * can find. Handle EIO and the ECH boards a little differently here |
| 2328 | * since the initial search and setup is very different. |
| 2329 | */ |
| 2330 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2331 | static int __init stl_brdinit(struct stlbrd *brdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | { |
| 2333 | int i; |
| 2334 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2335 | pr_debug("stl_brdinit(brdp=%p)\n", brdp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2336 | |
| 2337 | switch (brdp->brdtype) { |
| 2338 | case BRD_EASYIO: |
| 2339 | case BRD_EASYIOPCI: |
| 2340 | stl_initeio(brdp); |
| 2341 | break; |
| 2342 | case BRD_ECH: |
| 2343 | case BRD_ECHMC: |
| 2344 | case BRD_ECHPCI: |
| 2345 | case BRD_ECH64PCI: |
| 2346 | stl_initech(brdp); |
| 2347 | break; |
| 2348 | default: |
| 2349 | printk("STALLION: board=%d is unknown board type=%d\n", |
| 2350 | brdp->brdnr, brdp->brdtype); |
| 2351 | return(ENODEV); |
| 2352 | } |
| 2353 | |
| 2354 | stl_brds[brdp->brdnr] = brdp; |
| 2355 | if ((brdp->state & BRD_FOUND) == 0) { |
| 2356 | printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", |
| 2357 | stl_brdnames[brdp->brdtype], brdp->brdnr, |
| 2358 | brdp->ioaddr1, brdp->irq); |
| 2359 | return(ENODEV); |
| 2360 | } |
| 2361 | |
| 2362 | for (i = 0; (i < STL_MAXPANELS); i++) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2363 | if (brdp->panels[i] != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2364 | stl_initports(brdp, brdp->panels[i]); |
| 2365 | |
| 2366 | printk("STALLION: %s found, board=%d io=%x irq=%d " |
| 2367 | "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], |
| 2368 | brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, |
| 2369 | brdp->nrports); |
| 2370 | return(0); |
| 2371 | } |
| 2372 | |
| 2373 | /*****************************************************************************/ |
| 2374 | |
| 2375 | /* |
| 2376 | * Find the next available board number that is free. |
| 2377 | */ |
| 2378 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 2379 | static int __init stl_getbrdnr(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | { |
| 2381 | int i; |
| 2382 | |
| 2383 | for (i = 0; (i < STL_MAXBRDS); i++) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2384 | if (stl_brds[i] == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2385 | if (i >= stl_nrbrds) |
| 2386 | stl_nrbrds = i + 1; |
| 2387 | return(i); |
| 2388 | } |
| 2389 | } |
| 2390 | return(-1); |
| 2391 | } |
| 2392 | |
| 2393 | /*****************************************************************************/ |
| 2394 | |
| 2395 | #ifdef CONFIG_PCI |
| 2396 | |
| 2397 | /* |
| 2398 | * We have a Stallion board. Allocate a board structure and |
| 2399 | * initialize it. Read its IO and IRQ resources from PCI |
| 2400 | * configuration space. |
| 2401 | */ |
| 2402 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 2403 | static int __init stl_initpcibrd(int brdtype, struct pci_dev *devp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2405 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2407 | pr_debug("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | devp->bus->number, devp->devfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | |
| 2410 | if (pci_enable_device(devp)) |
| 2411 | return(-EIO); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2412 | if ((brdp = stl_allocbrd()) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2413 | return(-ENOMEM); |
| 2414 | if ((brdp->brdnr = stl_getbrdnr()) < 0) { |
| 2415 | printk("STALLION: too many boards found, " |
| 2416 | "maximum supported %d\n", STL_MAXBRDS); |
| 2417 | return(0); |
| 2418 | } |
| 2419 | brdp->brdtype = brdtype; |
| 2420 | |
| 2421 | /* |
| 2422 | * Different Stallion boards use the BAR registers in different ways, |
| 2423 | * so set up io addresses based on board type. |
| 2424 | */ |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2425 | pr_debug("%s(%d): BAR[]=%Lx,%Lx,%Lx,%Lx IRQ=%x\n", __FILE__, __LINE__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | pci_resource_start(devp, 0), pci_resource_start(devp, 1), |
| 2427 | pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2428 | |
| 2429 | /* |
| 2430 | * We have all resources from the board, so let's setup the actual |
| 2431 | * board structure now. |
| 2432 | */ |
| 2433 | switch (brdtype) { |
| 2434 | case BRD_ECHPCI: |
| 2435 | brdp->ioaddr2 = pci_resource_start(devp, 0); |
| 2436 | brdp->ioaddr1 = pci_resource_start(devp, 1); |
| 2437 | break; |
| 2438 | case BRD_ECH64PCI: |
| 2439 | brdp->ioaddr2 = pci_resource_start(devp, 2); |
| 2440 | brdp->ioaddr1 = pci_resource_start(devp, 1); |
| 2441 | break; |
| 2442 | case BRD_EASYIOPCI: |
| 2443 | brdp->ioaddr1 = pci_resource_start(devp, 2); |
| 2444 | brdp->ioaddr2 = pci_resource_start(devp, 1); |
| 2445 | break; |
| 2446 | default: |
| 2447 | printk("STALLION: unknown PCI board type=%d\n", brdtype); |
| 2448 | break; |
| 2449 | } |
| 2450 | |
| 2451 | brdp->irq = devp->irq; |
| 2452 | stl_brdinit(brdp); |
| 2453 | |
| 2454 | return(0); |
| 2455 | } |
| 2456 | |
| 2457 | /*****************************************************************************/ |
| 2458 | |
| 2459 | /* |
| 2460 | * Find all Stallion PCI boards that might be installed. Initialize each |
| 2461 | * one as it is found. |
| 2462 | */ |
| 2463 | |
| 2464 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 2465 | static int __init stl_findpcibrds(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | { |
| 2467 | struct pci_dev *dev = NULL; |
| 2468 | int i, rc; |
| 2469 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2470 | pr_debug("stl_findpcibrds()\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2471 | |
| 2472 | for (i = 0; (i < stl_nrpcibrds); i++) |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2473 | while ((dev = pci_get_device(stl_pcibrds[i].vendid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | stl_pcibrds[i].devid, dev))) { |
| 2475 | |
| 2476 | /* |
| 2477 | * Found a device on the PCI bus that has our vendor and |
| 2478 | * device ID. Need to check now that it is really us. |
| 2479 | */ |
| 2480 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) |
| 2481 | continue; |
| 2482 | |
| 2483 | rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev); |
| 2484 | if (rc) |
| 2485 | return(rc); |
| 2486 | } |
| 2487 | |
| 2488 | return(0); |
| 2489 | } |
| 2490 | |
| 2491 | #endif |
| 2492 | |
| 2493 | /*****************************************************************************/ |
| 2494 | |
| 2495 | /* |
| 2496 | * Scan through all the boards in the configuration and see what we |
| 2497 | * can find. Handle EIO and the ECH boards a little differently here |
| 2498 | * since the initial search and setup is too different. |
| 2499 | */ |
| 2500 | |
Jiri Slaby | 40e8265 | 2006-12-08 02:38:41 -0800 | [diff] [blame] | 2501 | static int __init stl_initbrds(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2502 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2503 | struct stlbrd *brdp; |
| 2504 | struct stlconf *confp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | int i; |
| 2506 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2507 | pr_debug("stl_initbrds()\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2508 | |
| 2509 | if (stl_nrbrds > STL_MAXBRDS) { |
| 2510 | printk("STALLION: too many boards in configuration table, " |
| 2511 | "truncating to %d\n", STL_MAXBRDS); |
| 2512 | stl_nrbrds = STL_MAXBRDS; |
| 2513 | } |
| 2514 | |
| 2515 | /* |
| 2516 | * Firstly scan the list of static boards configured. Allocate |
| 2517 | * resources and initialize the boards as found. |
| 2518 | */ |
| 2519 | for (i = 0; (i < stl_nrbrds); i++) { |
| 2520 | confp = &stl_brdconf[i]; |
| 2521 | stl_parsebrd(confp, stl_brdsp[i]); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2522 | if ((brdp = stl_allocbrd()) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | return(-ENOMEM); |
| 2524 | brdp->brdnr = i; |
| 2525 | brdp->brdtype = confp->brdtype; |
| 2526 | brdp->ioaddr1 = confp->ioaddr1; |
| 2527 | brdp->ioaddr2 = confp->ioaddr2; |
| 2528 | brdp->irq = confp->irq; |
| 2529 | brdp->irqtype = confp->irqtype; |
| 2530 | stl_brdinit(brdp); |
| 2531 | } |
| 2532 | |
| 2533 | /* |
| 2534 | * Find any dynamically supported boards. That is via module load |
| 2535 | * line options or auto-detected on the PCI bus. |
| 2536 | */ |
| 2537 | stl_argbrds(); |
| 2538 | #ifdef CONFIG_PCI |
| 2539 | stl_findpcibrds(); |
| 2540 | #endif |
| 2541 | |
| 2542 | return(0); |
| 2543 | } |
| 2544 | |
| 2545 | /*****************************************************************************/ |
| 2546 | |
| 2547 | /* |
| 2548 | * Return the board stats structure to user app. |
| 2549 | */ |
| 2550 | |
| 2551 | static int stl_getbrdstats(combrd_t __user *bp) |
| 2552 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2553 | struct stlbrd *brdp; |
| 2554 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | int i; |
| 2556 | |
| 2557 | if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) |
| 2558 | return -EFAULT; |
| 2559 | if (stl_brdstats.brd >= STL_MAXBRDS) |
| 2560 | return(-ENODEV); |
| 2561 | brdp = stl_brds[stl_brdstats.brd]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2562 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | return(-ENODEV); |
| 2564 | |
| 2565 | memset(&stl_brdstats, 0, sizeof(combrd_t)); |
| 2566 | stl_brdstats.brd = brdp->brdnr; |
| 2567 | stl_brdstats.type = brdp->brdtype; |
| 2568 | stl_brdstats.hwid = brdp->hwid; |
| 2569 | stl_brdstats.state = brdp->state; |
| 2570 | stl_brdstats.ioaddr = brdp->ioaddr1; |
| 2571 | stl_brdstats.ioaddr2 = brdp->ioaddr2; |
| 2572 | stl_brdstats.irq = brdp->irq; |
| 2573 | stl_brdstats.nrpanels = brdp->nrpanels; |
| 2574 | stl_brdstats.nrports = brdp->nrports; |
| 2575 | for (i = 0; (i < brdp->nrpanels); i++) { |
| 2576 | panelp = brdp->panels[i]; |
| 2577 | stl_brdstats.panels[i].panel = i; |
| 2578 | stl_brdstats.panels[i].hwid = panelp->hwid; |
| 2579 | stl_brdstats.panels[i].nrports = panelp->nrports; |
| 2580 | } |
| 2581 | |
| 2582 | return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; |
| 2583 | } |
| 2584 | |
| 2585 | /*****************************************************************************/ |
| 2586 | |
| 2587 | /* |
| 2588 | * Resolve the referenced port number into a port struct pointer. |
| 2589 | */ |
| 2590 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2591 | static struct stlport *stl_getport(int brdnr, int panelnr, int portnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2593 | struct stlbrd *brdp; |
| 2594 | struct stlpanel *panelp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2595 | |
| 2596 | if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2597 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | brdp = stl_brds[brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2599 | if (brdp == NULL) |
| 2600 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2602 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2603 | panelp = brdp->panels[panelnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2604 | if (panelp == NULL) |
| 2605 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2606 | if ((portnr < 0) || (portnr >= panelp->nrports)) |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2607 | return(NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | return(panelp->ports[portnr]); |
| 2609 | } |
| 2610 | |
| 2611 | /*****************************************************************************/ |
| 2612 | |
| 2613 | /* |
| 2614 | * Return the port stats structure to user app. A NULL port struct |
| 2615 | * pointer passed in means that we need to find out from the app |
| 2616 | * what port to get stats for (used through board control device). |
| 2617 | */ |
| 2618 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2619 | static int stl_getportstats(struct stlport *portp, comstats_t __user *cp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | { |
| 2621 | unsigned char *head, *tail; |
| 2622 | unsigned long flags; |
| 2623 | |
| 2624 | if (!portp) { |
| 2625 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| 2626 | return -EFAULT; |
| 2627 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| 2628 | stl_comstats.port); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2629 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | return(-ENODEV); |
| 2631 | } |
| 2632 | |
| 2633 | portp->stats.state = portp->istate; |
| 2634 | portp->stats.flags = portp->flags; |
| 2635 | portp->stats.hwid = portp->hwid; |
| 2636 | |
| 2637 | portp->stats.ttystate = 0; |
| 2638 | portp->stats.cflags = 0; |
| 2639 | portp->stats.iflags = 0; |
| 2640 | portp->stats.oflags = 0; |
| 2641 | portp->stats.lflags = 0; |
| 2642 | portp->stats.rxbuffered = 0; |
| 2643 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2644 | spin_lock_irqsave(&stallion_lock, flags); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2645 | if (portp->tty != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | if (portp->tty->driver_data == portp) { |
| 2647 | portp->stats.ttystate = portp->tty->flags; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2648 | /* No longer available as a statistic */ |
| 2649 | portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */ |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2650 | if (portp->tty->termios != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | portp->stats.cflags = portp->tty->termios->c_cflag; |
| 2652 | portp->stats.iflags = portp->tty->termios->c_iflag; |
| 2653 | portp->stats.oflags = portp->tty->termios->c_oflag; |
| 2654 | portp->stats.lflags = portp->tty->termios->c_lflag; |
| 2655 | } |
| 2656 | } |
| 2657 | } |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2658 | spin_unlock_irqrestore(&stallion_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | |
| 2660 | head = portp->tx.head; |
| 2661 | tail = portp->tx.tail; |
| 2662 | portp->stats.txbuffered = ((head >= tail) ? (head - tail) : |
| 2663 | (STL_TXBUFSIZE - (tail - head))); |
| 2664 | |
| 2665 | portp->stats.signals = (unsigned long) stl_getsignals(portp); |
| 2666 | |
| 2667 | return copy_to_user(cp, &portp->stats, |
| 2668 | sizeof(comstats_t)) ? -EFAULT : 0; |
| 2669 | } |
| 2670 | |
| 2671 | /*****************************************************************************/ |
| 2672 | |
| 2673 | /* |
| 2674 | * Clear the port stats structure. We also return it zeroed out... |
| 2675 | */ |
| 2676 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2677 | static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2678 | { |
| 2679 | if (!portp) { |
| 2680 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| 2681 | return -EFAULT; |
| 2682 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| 2683 | stl_comstats.port); |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2684 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2685 | return(-ENODEV); |
| 2686 | } |
| 2687 | |
| 2688 | memset(&portp->stats, 0, sizeof(comstats_t)); |
| 2689 | portp->stats.brd = portp->brdnr; |
| 2690 | portp->stats.panel = portp->panelnr; |
| 2691 | portp->stats.port = portp->portnr; |
| 2692 | return copy_to_user(cp, &portp->stats, |
| 2693 | sizeof(comstats_t)) ? -EFAULT : 0; |
| 2694 | } |
| 2695 | |
| 2696 | /*****************************************************************************/ |
| 2697 | |
| 2698 | /* |
| 2699 | * Return the entire driver ports structure to a user app. |
| 2700 | */ |
| 2701 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2702 | static int stl_getportstruct(struct stlport __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2704 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2705 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2706 | if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | return -EFAULT; |
| 2708 | portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, |
| 2709 | stl_dummyport.portnr); |
| 2710 | if (!portp) |
| 2711 | return -ENODEV; |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2712 | return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2713 | } |
| 2714 | |
| 2715 | /*****************************************************************************/ |
| 2716 | |
| 2717 | /* |
| 2718 | * Return the entire driver board structure to a user app. |
| 2719 | */ |
| 2720 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2721 | static int stl_getbrdstruct(struct stlbrd __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2722 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2723 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2724 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2725 | if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | return -EFAULT; |
| 2727 | if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) |
| 2728 | return -ENODEV; |
| 2729 | brdp = stl_brds[stl_dummybrd.brdnr]; |
| 2730 | if (!brdp) |
| 2731 | return(-ENODEV); |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2732 | return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | } |
| 2734 | |
| 2735 | /*****************************************************************************/ |
| 2736 | |
| 2737 | /* |
| 2738 | * The "staliomem" device is also required to do some special operations |
| 2739 | * on the board and/or ports. In this driver it is mostly used for stats |
| 2740 | * collection. |
| 2741 | */ |
| 2742 | |
| 2743 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) |
| 2744 | { |
| 2745 | int brdnr, rc; |
| 2746 | void __user *argp = (void __user *)arg; |
| 2747 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2748 | 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] | 2749 | |
| 2750 | brdnr = iminor(ip); |
| 2751 | if (brdnr >= STL_MAXBRDS) |
| 2752 | return(-ENODEV); |
| 2753 | rc = 0; |
| 2754 | |
| 2755 | switch (cmd) { |
| 2756 | case COM_GETPORTSTATS: |
| 2757 | rc = stl_getportstats(NULL, argp); |
| 2758 | break; |
| 2759 | case COM_CLRPORTSTATS: |
| 2760 | rc = stl_clrportstats(NULL, argp); |
| 2761 | break; |
| 2762 | case COM_GETBRDSTATS: |
| 2763 | rc = stl_getbrdstats(argp); |
| 2764 | break; |
| 2765 | case COM_READPORT: |
| 2766 | rc = stl_getportstruct(argp); |
| 2767 | break; |
| 2768 | case COM_READBOARD: |
| 2769 | rc = stl_getbrdstruct(argp); |
| 2770 | break; |
| 2771 | default: |
| 2772 | rc = -ENOIOCTLCMD; |
| 2773 | break; |
| 2774 | } |
| 2775 | |
| 2776 | return(rc); |
| 2777 | } |
| 2778 | |
Jeff Dike | b68e31d | 2006-10-02 02:17:18 -0700 | [diff] [blame] | 2779 | static const struct tty_operations stl_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2780 | .open = stl_open, |
| 2781 | .close = stl_close, |
| 2782 | .write = stl_write, |
| 2783 | .put_char = stl_putchar, |
| 2784 | .flush_chars = stl_flushchars, |
| 2785 | .write_room = stl_writeroom, |
| 2786 | .chars_in_buffer = stl_charsinbuffer, |
| 2787 | .ioctl = stl_ioctl, |
| 2788 | .set_termios = stl_settermios, |
| 2789 | .throttle = stl_throttle, |
| 2790 | .unthrottle = stl_unthrottle, |
| 2791 | .stop = stl_stop, |
| 2792 | .start = stl_start, |
| 2793 | .hangup = stl_hangup, |
| 2794 | .flush_buffer = stl_flushbuffer, |
| 2795 | .break_ctl = stl_breakctl, |
| 2796 | .wait_until_sent = stl_waituntilsent, |
| 2797 | .send_xchar = stl_sendxchar, |
| 2798 | .read_proc = stl_readproc, |
| 2799 | .tiocmget = stl_tiocmget, |
| 2800 | .tiocmset = stl_tiocmset, |
| 2801 | }; |
| 2802 | |
| 2803 | /*****************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2804 | /* CD1400 HARDWARE FUNCTIONS */ |
| 2805 | /*****************************************************************************/ |
| 2806 | |
| 2807 | /* |
| 2808 | * These functions get/set/update the registers of the cd1400 UARTs. |
| 2809 | * Access to the cd1400 registers is via an address/data io port pair. |
| 2810 | * (Maybe should make this inline...) |
| 2811 | */ |
| 2812 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2813 | static int stl_cd1400getreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2814 | { |
| 2815 | outb((regnr + portp->uartaddr), portp->ioaddr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2816 | return inb(portp->ioaddr + EREG_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | } |
| 2818 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2819 | static void stl_cd1400setreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2820 | { |
| 2821 | outb((regnr + portp->uartaddr), portp->ioaddr); |
| 2822 | outb(value, portp->ioaddr + EREG_DATA); |
| 2823 | } |
| 2824 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2825 | static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | { |
| 2827 | outb((regnr + portp->uartaddr), portp->ioaddr); |
| 2828 | if (inb(portp->ioaddr + EREG_DATA) != value) { |
| 2829 | outb(value, portp->ioaddr + EREG_DATA); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2830 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2831 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2832 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2833 | } |
| 2834 | |
| 2835 | /*****************************************************************************/ |
| 2836 | |
| 2837 | /* |
| 2838 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
| 2839 | * these ports are on - since the port io registers are almost |
| 2840 | * identical when dealing with ports. |
| 2841 | */ |
| 2842 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2843 | static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2844 | { |
| 2845 | unsigned int gfrcr; |
| 2846 | int chipmask, i, j; |
| 2847 | int nrchips, uartaddr, ioaddr; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2848 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2849 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2850 | pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2851 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2852 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2853 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
| 2854 | |
| 2855 | /* |
| 2856 | * Check that each chip is present and started up OK. |
| 2857 | */ |
| 2858 | chipmask = 0; |
| 2859 | nrchips = panelp->nrports / CD1400_PORTS; |
| 2860 | for (i = 0; (i < nrchips); i++) { |
| 2861 | if (brdp->brdtype == BRD_ECHPCI) { |
| 2862 | outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); |
| 2863 | ioaddr = panelp->iobase; |
| 2864 | } else { |
| 2865 | ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); |
| 2866 | } |
| 2867 | uartaddr = (i & 0x01) ? 0x080 : 0; |
| 2868 | outb((GFRCR + uartaddr), ioaddr); |
| 2869 | outb(0, (ioaddr + EREG_DATA)); |
| 2870 | outb((CCR + uartaddr), ioaddr); |
| 2871 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| 2872 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| 2873 | outb((GFRCR + uartaddr), ioaddr); |
| 2874 | for (j = 0; (j < CCR_MAXWAIT); j++) { |
| 2875 | if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) |
| 2876 | break; |
| 2877 | } |
| 2878 | if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { |
| 2879 | printk("STALLION: cd1400 not responding, " |
| 2880 | "brd=%d panel=%d chip=%d\n", |
| 2881 | panelp->brdnr, panelp->panelnr, i); |
| 2882 | continue; |
| 2883 | } |
| 2884 | chipmask |= (0x1 << i); |
| 2885 | outb((PPR + uartaddr), ioaddr); |
| 2886 | outb(PPR_SCALAR, (ioaddr + EREG_DATA)); |
| 2887 | } |
| 2888 | |
| 2889 | BRDDISABLE(panelp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2890 | spin_unlock_irqrestore(&brd_lock, flags); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2891 | return chipmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2892 | } |
| 2893 | |
| 2894 | /*****************************************************************************/ |
| 2895 | |
| 2896 | /* |
| 2897 | * Initialize hardware specific port registers. |
| 2898 | */ |
| 2899 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2900 | 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] | 2901 | { |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2902 | unsigned long flags; |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 2903 | pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
| 2904 | panelp, portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2905 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2906 | if ((brdp == NULL) || (panelp == NULL) || |
| 2907 | (portp == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2908 | return; |
| 2909 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2910 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2911 | portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
| 2912 | (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); |
| 2913 | portp->uartaddr = (portp->portnr & 0x04) << 5; |
| 2914 | portp->pagenr = panelp->pagenr + (portp->portnr >> 3); |
| 2915 | |
| 2916 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 2917 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 2918 | stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); |
| 2919 | portp->hwid = stl_cd1400getreg(portp, GFRCR); |
| 2920 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 2921 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2922 | } |
| 2923 | |
| 2924 | /*****************************************************************************/ |
| 2925 | |
| 2926 | /* |
| 2927 | * Wait for the command register to be ready. We will poll this, |
| 2928 | * since it won't usually take too long to be ready. |
| 2929 | */ |
| 2930 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2931 | static void stl_cd1400ccrwait(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2932 | { |
| 2933 | int i; |
| 2934 | |
| 2935 | for (i = 0; (i < CCR_MAXWAIT); i++) { |
| 2936 | if (stl_cd1400getreg(portp, CCR) == 0) { |
| 2937 | return; |
| 2938 | } |
| 2939 | } |
| 2940 | |
| 2941 | printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", |
| 2942 | portp->portnr, portp->panelnr, portp->brdnr); |
| 2943 | } |
| 2944 | |
| 2945 | /*****************************************************************************/ |
| 2946 | |
| 2947 | /* |
| 2948 | * Set up the cd1400 registers for a port based on the termios port |
| 2949 | * settings. |
| 2950 | */ |
| 2951 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 2952 | static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2953 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 2954 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2955 | unsigned long flags; |
| 2956 | unsigned int clkdiv, baudrate; |
| 2957 | unsigned char cor1, cor2, cor3; |
| 2958 | unsigned char cor4, cor5, ccr; |
| 2959 | unsigned char srer, sreron, sreroff; |
| 2960 | unsigned char mcor1, mcor2, rtpr; |
| 2961 | unsigned char clk, div; |
| 2962 | |
| 2963 | cor1 = 0; |
| 2964 | cor2 = 0; |
| 2965 | cor3 = 0; |
| 2966 | cor4 = 0; |
| 2967 | cor5 = 0; |
| 2968 | ccr = 0; |
| 2969 | rtpr = 0; |
| 2970 | clk = 0; |
| 2971 | div = 0; |
| 2972 | mcor1 = 0; |
| 2973 | mcor2 = 0; |
| 2974 | sreron = 0; |
| 2975 | sreroff = 0; |
| 2976 | |
| 2977 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 2978 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | return; |
| 2980 | |
| 2981 | /* |
| 2982 | * Set up the RX char ignore mask with those RX error types we |
| 2983 | * can ignore. We can get the cd1400 to help us out a little here, |
| 2984 | * it will ignore parity errors and breaks for us. |
| 2985 | */ |
| 2986 | portp->rxignoremsk = 0; |
| 2987 | if (tiosp->c_iflag & IGNPAR) { |
| 2988 | portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); |
| 2989 | cor1 |= COR1_PARIGNORE; |
| 2990 | } |
| 2991 | if (tiosp->c_iflag & IGNBRK) { |
| 2992 | portp->rxignoremsk |= ST_BREAK; |
| 2993 | cor4 |= COR4_IGNBRK; |
| 2994 | } |
| 2995 | |
| 2996 | portp->rxmarkmsk = ST_OVERRUN; |
| 2997 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
| 2998 | portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); |
| 2999 | if (tiosp->c_iflag & BRKINT) |
| 3000 | portp->rxmarkmsk |= ST_BREAK; |
| 3001 | |
| 3002 | /* |
| 3003 | * Go through the char size, parity and stop bits and set all the |
| 3004 | * option register appropriately. |
| 3005 | */ |
| 3006 | switch (tiosp->c_cflag & CSIZE) { |
| 3007 | case CS5: |
| 3008 | cor1 |= COR1_CHL5; |
| 3009 | break; |
| 3010 | case CS6: |
| 3011 | cor1 |= COR1_CHL6; |
| 3012 | break; |
| 3013 | case CS7: |
| 3014 | cor1 |= COR1_CHL7; |
| 3015 | break; |
| 3016 | default: |
| 3017 | cor1 |= COR1_CHL8; |
| 3018 | break; |
| 3019 | } |
| 3020 | |
| 3021 | if (tiosp->c_cflag & CSTOPB) |
| 3022 | cor1 |= COR1_STOP2; |
| 3023 | else |
| 3024 | cor1 |= COR1_STOP1; |
| 3025 | |
| 3026 | if (tiosp->c_cflag & PARENB) { |
| 3027 | if (tiosp->c_cflag & PARODD) |
| 3028 | cor1 |= (COR1_PARENB | COR1_PARODD); |
| 3029 | else |
| 3030 | cor1 |= (COR1_PARENB | COR1_PAREVEN); |
| 3031 | } else { |
| 3032 | cor1 |= COR1_PARNONE; |
| 3033 | } |
| 3034 | |
| 3035 | /* |
| 3036 | * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing |
| 3037 | * space for hardware flow control and the like. This should be set to |
| 3038 | * VMIN. Also here we will set the RX data timeout to 10ms - this should |
| 3039 | * really be based on VTIME. |
| 3040 | */ |
| 3041 | cor3 |= FIFO_RXTHRESHOLD; |
| 3042 | rtpr = 2; |
| 3043 | |
| 3044 | /* |
| 3045 | * Calculate the baud rate timers. For now we will just assume that |
| 3046 | * the input and output baud are the same. Could have used a baud |
| 3047 | * table here, but this way we can generate virtually any baud rate |
| 3048 | * we like! |
| 3049 | */ |
| 3050 | baudrate = tiosp->c_cflag & CBAUD; |
| 3051 | if (baudrate & CBAUDEX) { |
| 3052 | baudrate &= ~CBAUDEX; |
| 3053 | if ((baudrate < 1) || (baudrate > 4)) |
| 3054 | tiosp->c_cflag &= ~CBAUDEX; |
| 3055 | else |
| 3056 | baudrate += 15; |
| 3057 | } |
| 3058 | baudrate = stl_baudrates[baudrate]; |
| 3059 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
| 3060 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 3061 | baudrate = 57600; |
| 3062 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 3063 | baudrate = 115200; |
| 3064 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 3065 | baudrate = 230400; |
| 3066 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 3067 | baudrate = 460800; |
| 3068 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| 3069 | baudrate = (portp->baud_base / portp->custom_divisor); |
| 3070 | } |
| 3071 | if (baudrate > STL_CD1400MAXBAUD) |
| 3072 | baudrate = STL_CD1400MAXBAUD; |
| 3073 | |
| 3074 | if (baudrate > 0) { |
| 3075 | for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { |
| 3076 | clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); |
| 3077 | if (clkdiv < 0x100) |
| 3078 | break; |
| 3079 | } |
| 3080 | div = (unsigned char) clkdiv; |
| 3081 | } |
| 3082 | |
| 3083 | /* |
| 3084 | * Check what form of modem signaling is required and set it up. |
| 3085 | */ |
| 3086 | if ((tiosp->c_cflag & CLOCAL) == 0) { |
| 3087 | mcor1 |= MCOR1_DCD; |
| 3088 | mcor2 |= MCOR2_DCD; |
| 3089 | sreron |= SRER_MODEM; |
| 3090 | portp->flags |= ASYNC_CHECK_CD; |
| 3091 | } else { |
| 3092 | portp->flags &= ~ASYNC_CHECK_CD; |
| 3093 | } |
| 3094 | |
| 3095 | /* |
| 3096 | * Setup cd1400 enhanced modes if we can. In particular we want to |
| 3097 | * handle as much of the flow control as possible automatically. As |
| 3098 | * well as saving a few CPU cycles it will also greatly improve flow |
| 3099 | * control reliability. |
| 3100 | */ |
| 3101 | if (tiosp->c_iflag & IXON) { |
| 3102 | cor2 |= COR2_TXIBE; |
| 3103 | cor3 |= COR3_SCD12; |
| 3104 | if (tiosp->c_iflag & IXANY) |
| 3105 | cor2 |= COR2_IXM; |
| 3106 | } |
| 3107 | |
| 3108 | if (tiosp->c_cflag & CRTSCTS) { |
| 3109 | cor2 |= COR2_CTSAE; |
| 3110 | mcor1 |= FIFO_RTSTHRESHOLD; |
| 3111 | } |
| 3112 | |
| 3113 | /* |
| 3114 | * All cd1400 register values calculated so go through and set |
| 3115 | * them all up. |
| 3116 | */ |
| 3117 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3118 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3119 | portp->portnr, portp->panelnr, portp->brdnr); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3120 | 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] | 3121 | cor1, cor2, cor3, cor4, cor5); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3122 | 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] | 3123 | mcor1, mcor2, rtpr, sreron, sreroff); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3124 | pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); |
| 3125 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3126 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| 3127 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3128 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3129 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3130 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3131 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); |
| 3132 | srer = stl_cd1400getreg(portp, SRER); |
| 3133 | stl_cd1400setreg(portp, SRER, 0); |
| 3134 | if (stl_cd1400updatereg(portp, COR1, cor1)) |
| 3135 | ccr = 1; |
| 3136 | if (stl_cd1400updatereg(portp, COR2, cor2)) |
| 3137 | ccr = 1; |
| 3138 | if (stl_cd1400updatereg(portp, COR3, cor3)) |
| 3139 | ccr = 1; |
| 3140 | if (ccr) { |
| 3141 | stl_cd1400ccrwait(portp); |
| 3142 | stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); |
| 3143 | } |
| 3144 | stl_cd1400setreg(portp, COR4, cor4); |
| 3145 | stl_cd1400setreg(portp, COR5, cor5); |
| 3146 | stl_cd1400setreg(portp, MCOR1, mcor1); |
| 3147 | stl_cd1400setreg(portp, MCOR2, mcor2); |
| 3148 | if (baudrate > 0) { |
| 3149 | stl_cd1400setreg(portp, TCOR, clk); |
| 3150 | stl_cd1400setreg(portp, TBPR, div); |
| 3151 | stl_cd1400setreg(portp, RCOR, clk); |
| 3152 | stl_cd1400setreg(portp, RBPR, div); |
| 3153 | } |
| 3154 | stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); |
| 3155 | stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); |
| 3156 | stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); |
| 3157 | stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); |
| 3158 | stl_cd1400setreg(portp, RTPR, rtpr); |
| 3159 | mcor1 = stl_cd1400getreg(portp, MSVR1); |
| 3160 | if (mcor1 & MSVR1_DCD) |
| 3161 | portp->sigs |= TIOCM_CD; |
| 3162 | else |
| 3163 | portp->sigs &= ~TIOCM_CD; |
| 3164 | stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); |
| 3165 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3166 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3167 | } |
| 3168 | |
| 3169 | /*****************************************************************************/ |
| 3170 | |
| 3171 | /* |
| 3172 | * Set the state of the DTR and RTS signals. |
| 3173 | */ |
| 3174 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3175 | static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3176 | { |
| 3177 | unsigned char msvr1, msvr2; |
| 3178 | unsigned long flags; |
| 3179 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3180 | pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n", |
| 3181 | portp, dtr, rts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | |
| 3183 | msvr1 = 0; |
| 3184 | msvr2 = 0; |
| 3185 | if (dtr > 0) |
| 3186 | msvr1 = MSVR1_DTR; |
| 3187 | if (rts > 0) |
| 3188 | msvr2 = MSVR2_RTS; |
| 3189 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3190 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3192 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3193 | if (rts >= 0) |
| 3194 | stl_cd1400setreg(portp, MSVR2, msvr2); |
| 3195 | if (dtr >= 0) |
| 3196 | stl_cd1400setreg(portp, MSVR1, msvr1); |
| 3197 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3198 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3199 | } |
| 3200 | |
| 3201 | /*****************************************************************************/ |
| 3202 | |
| 3203 | /* |
| 3204 | * Return the state of the signals. |
| 3205 | */ |
| 3206 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3207 | static int stl_cd1400getsignals(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3208 | { |
| 3209 | unsigned char msvr1, msvr2; |
| 3210 | unsigned long flags; |
| 3211 | int sigs; |
| 3212 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3213 | pr_debug("stl_cd1400getsignals(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3215 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3216 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3217 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3218 | msvr1 = stl_cd1400getreg(portp, MSVR1); |
| 3219 | msvr2 = stl_cd1400getreg(portp, MSVR2); |
| 3220 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3221 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3222 | |
| 3223 | sigs = 0; |
| 3224 | sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; |
| 3225 | sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; |
| 3226 | sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; |
| 3227 | sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; |
| 3228 | #if 0 |
| 3229 | sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; |
| 3230 | sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; |
| 3231 | #else |
| 3232 | sigs |= TIOCM_DSR; |
| 3233 | #endif |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3234 | return sigs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3235 | } |
| 3236 | |
| 3237 | /*****************************************************************************/ |
| 3238 | |
| 3239 | /* |
| 3240 | * Enable/Disable the Transmitter and/or Receiver. |
| 3241 | */ |
| 3242 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3243 | static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3244 | { |
| 3245 | unsigned char ccr; |
| 3246 | unsigned long flags; |
| 3247 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3248 | pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx); |
| 3249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3250 | ccr = 0; |
| 3251 | |
| 3252 | if (tx == 0) |
| 3253 | ccr |= CCR_TXDISABLE; |
| 3254 | else if (tx > 0) |
| 3255 | ccr |= CCR_TXENABLE; |
| 3256 | if (rx == 0) |
| 3257 | ccr |= CCR_RXDISABLE; |
| 3258 | else if (rx > 0) |
| 3259 | ccr |= CCR_RXENABLE; |
| 3260 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3261 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3262 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3263 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3264 | stl_cd1400ccrwait(portp); |
| 3265 | stl_cd1400setreg(portp, CCR, ccr); |
| 3266 | stl_cd1400ccrwait(portp); |
| 3267 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3268 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3269 | } |
| 3270 | |
| 3271 | /*****************************************************************************/ |
| 3272 | |
| 3273 | /* |
| 3274 | * Start/stop the Transmitter and/or Receiver. |
| 3275 | */ |
| 3276 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3277 | static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3278 | { |
| 3279 | unsigned char sreron, sreroff; |
| 3280 | unsigned long flags; |
| 3281 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3282 | 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] | 3283 | |
| 3284 | sreron = 0; |
| 3285 | sreroff = 0; |
| 3286 | if (tx == 0) |
| 3287 | sreroff |= (SRER_TXDATA | SRER_TXEMPTY); |
| 3288 | else if (tx == 1) |
| 3289 | sreron |= SRER_TXDATA; |
| 3290 | else if (tx >= 2) |
| 3291 | sreron |= SRER_TXEMPTY; |
| 3292 | if (rx == 0) |
| 3293 | sreroff |= SRER_RXDATA; |
| 3294 | else if (rx > 0) |
| 3295 | sreron |= SRER_RXDATA; |
| 3296 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3297 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3298 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3299 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3300 | stl_cd1400setreg(portp, SRER, |
| 3301 | ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); |
| 3302 | BRDDISABLE(portp->brdnr); |
| 3303 | if (tx > 0) |
| 3304 | set_bit(ASYI_TXBUSY, &portp->istate); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3305 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3306 | } |
| 3307 | |
| 3308 | /*****************************************************************************/ |
| 3309 | |
| 3310 | /* |
| 3311 | * Disable all interrupts from this port. |
| 3312 | */ |
| 3313 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3314 | static void stl_cd1400disableintrs(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3315 | { |
| 3316 | unsigned long flags; |
| 3317 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3318 | pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp); |
| 3319 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3320 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3321 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3322 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3323 | stl_cd1400setreg(portp, SRER, 0); |
| 3324 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3325 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3326 | } |
| 3327 | |
| 3328 | /*****************************************************************************/ |
| 3329 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3330 | static void stl_cd1400sendbreak(struct stlport *portp, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3331 | { |
| 3332 | unsigned long flags; |
| 3333 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3334 | pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3335 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3336 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3337 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3338 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3339 | stl_cd1400setreg(portp, SRER, |
| 3340 | ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | |
| 3341 | SRER_TXEMPTY)); |
| 3342 | BRDDISABLE(portp->brdnr); |
| 3343 | portp->brklen = len; |
| 3344 | if (len == 1) |
| 3345 | portp->stats.txbreaks++; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3346 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3347 | } |
| 3348 | |
| 3349 | /*****************************************************************************/ |
| 3350 | |
| 3351 | /* |
| 3352 | * Take flow control actions... |
| 3353 | */ |
| 3354 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3355 | static void stl_cd1400flowctrl(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3356 | { |
| 3357 | struct tty_struct *tty; |
| 3358 | unsigned long flags; |
| 3359 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3360 | pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3361 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3362 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3363 | return; |
| 3364 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3365 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3366 | return; |
| 3367 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3368 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3369 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3370 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3371 | |
| 3372 | if (state) { |
| 3373 | if (tty->termios->c_iflag & IXOFF) { |
| 3374 | stl_cd1400ccrwait(portp); |
| 3375 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| 3376 | portp->stats.rxxon++; |
| 3377 | stl_cd1400ccrwait(portp); |
| 3378 | } |
| 3379 | /* |
| 3380 | * Question: should we return RTS to what it was before? It may |
| 3381 | * have been set by an ioctl... Suppose not, since if you have |
| 3382 | * hardware flow control set then it is pretty silly to go and |
| 3383 | * set the RTS line by hand. |
| 3384 | */ |
| 3385 | if (tty->termios->c_cflag & CRTSCTS) { |
| 3386 | stl_cd1400setreg(portp, MCOR1, |
| 3387 | (stl_cd1400getreg(portp, MCOR1) | |
| 3388 | FIFO_RTSTHRESHOLD)); |
| 3389 | stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); |
| 3390 | portp->stats.rxrtson++; |
| 3391 | } |
| 3392 | } else { |
| 3393 | if (tty->termios->c_iflag & IXOFF) { |
| 3394 | stl_cd1400ccrwait(portp); |
| 3395 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| 3396 | portp->stats.rxxoff++; |
| 3397 | stl_cd1400ccrwait(portp); |
| 3398 | } |
| 3399 | if (tty->termios->c_cflag & CRTSCTS) { |
| 3400 | stl_cd1400setreg(portp, MCOR1, |
| 3401 | (stl_cd1400getreg(portp, MCOR1) & 0xf0)); |
| 3402 | stl_cd1400setreg(portp, MSVR2, 0); |
| 3403 | portp->stats.rxrtsoff++; |
| 3404 | } |
| 3405 | } |
| 3406 | |
| 3407 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3408 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3409 | } |
| 3410 | |
| 3411 | /*****************************************************************************/ |
| 3412 | |
| 3413 | /* |
| 3414 | * Send a flow control character... |
| 3415 | */ |
| 3416 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3417 | static void stl_cd1400sendflow(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | { |
| 3419 | struct tty_struct *tty; |
| 3420 | unsigned long flags; |
| 3421 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3422 | pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3423 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3424 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3425 | return; |
| 3426 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3427 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3428 | return; |
| 3429 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3430 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3431 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3432 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3433 | if (state) { |
| 3434 | stl_cd1400ccrwait(portp); |
| 3435 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| 3436 | portp->stats.rxxon++; |
| 3437 | stl_cd1400ccrwait(portp); |
| 3438 | } else { |
| 3439 | stl_cd1400ccrwait(portp); |
| 3440 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| 3441 | portp->stats.rxxoff++; |
| 3442 | stl_cd1400ccrwait(portp); |
| 3443 | } |
| 3444 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3445 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3446 | } |
| 3447 | |
| 3448 | /*****************************************************************************/ |
| 3449 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3450 | static void stl_cd1400flush(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3451 | { |
| 3452 | unsigned long flags; |
| 3453 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3454 | pr_debug("stl_cd1400flush(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3455 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3456 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3457 | return; |
| 3458 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3459 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3460 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3461 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3462 | stl_cd1400ccrwait(portp); |
| 3463 | stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); |
| 3464 | stl_cd1400ccrwait(portp); |
| 3465 | portp->tx.tail = portp->tx.head; |
| 3466 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3467 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3468 | } |
| 3469 | |
| 3470 | /*****************************************************************************/ |
| 3471 | |
| 3472 | /* |
| 3473 | * Return the current state of data flow on this port. This is only |
| 3474 | * really interresting when determining if data has fully completed |
| 3475 | * transmission or not... This is easy for the cd1400, it accurately |
| 3476 | * maintains the busy port flag. |
| 3477 | */ |
| 3478 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3479 | static int stl_cd1400datastate(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3480 | { |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3481 | pr_debug("stl_cd1400datastate(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3482 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3483 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3484 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3485 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3486 | return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3487 | } |
| 3488 | |
| 3489 | /*****************************************************************************/ |
| 3490 | |
| 3491 | /* |
| 3492 | * Interrupt service routine for cd1400 EasyIO boards. |
| 3493 | */ |
| 3494 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3495 | static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3496 | { |
| 3497 | unsigned char svrtype; |
| 3498 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3499 | pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3500 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3501 | spin_lock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3502 | outb(SVRR, iobase); |
| 3503 | svrtype = inb(iobase + EREG_DATA); |
| 3504 | if (panelp->nrports > 4) { |
| 3505 | outb((SVRR + 0x80), iobase); |
| 3506 | svrtype |= inb(iobase + EREG_DATA); |
| 3507 | } |
| 3508 | |
| 3509 | if (svrtype & SVRR_RX) |
| 3510 | stl_cd1400rxisr(panelp, iobase); |
| 3511 | else if (svrtype & SVRR_TX) |
| 3512 | stl_cd1400txisr(panelp, iobase); |
| 3513 | else if (svrtype & SVRR_MDM) |
| 3514 | stl_cd1400mdmisr(panelp, iobase); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 3515 | |
| 3516 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3517 | } |
| 3518 | |
| 3519 | /*****************************************************************************/ |
| 3520 | |
| 3521 | /* |
| 3522 | * Interrupt service routine for cd1400 panels. |
| 3523 | */ |
| 3524 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3525 | static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3526 | { |
| 3527 | unsigned char svrtype; |
| 3528 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3529 | pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3530 | |
| 3531 | outb(SVRR, iobase); |
| 3532 | svrtype = inb(iobase + EREG_DATA); |
| 3533 | outb((SVRR + 0x80), iobase); |
| 3534 | svrtype |= inb(iobase + EREG_DATA); |
| 3535 | if (svrtype & SVRR_RX) |
| 3536 | stl_cd1400rxisr(panelp, iobase); |
| 3537 | else if (svrtype & SVRR_TX) |
| 3538 | stl_cd1400txisr(panelp, iobase); |
| 3539 | else if (svrtype & SVRR_MDM) |
| 3540 | stl_cd1400mdmisr(panelp, iobase); |
| 3541 | } |
| 3542 | |
| 3543 | |
| 3544 | /*****************************************************************************/ |
| 3545 | |
| 3546 | /* |
| 3547 | * Unfortunately we need to handle breaks in the TX data stream, since |
| 3548 | * this is the only way to generate them on the cd1400. |
| 3549 | */ |
| 3550 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 3551 | static int stl_cd1400breakisr(struct stlport *portp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3552 | { |
| 3553 | if (portp->brklen == 1) { |
| 3554 | outb((COR2 + portp->uartaddr), ioaddr); |
| 3555 | outb((inb(ioaddr + EREG_DATA) | COR2_ETC), |
| 3556 | (ioaddr + EREG_DATA)); |
| 3557 | outb((TDR + portp->uartaddr), ioaddr); |
| 3558 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| 3559 | outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); |
| 3560 | outb((SRER + portp->uartaddr), ioaddr); |
| 3561 | outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), |
| 3562 | (ioaddr + EREG_DATA)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3563 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3564 | } else if (portp->brklen > 1) { |
| 3565 | outb((TDR + portp->uartaddr), ioaddr); |
| 3566 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| 3567 | outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); |
| 3568 | portp->brklen = -1; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3569 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3570 | } else { |
| 3571 | outb((COR2 + portp->uartaddr), ioaddr); |
| 3572 | outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), |
| 3573 | (ioaddr + EREG_DATA)); |
| 3574 | portp->brklen = 0; |
| 3575 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3576 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3577 | } |
| 3578 | |
| 3579 | /*****************************************************************************/ |
| 3580 | |
| 3581 | /* |
| 3582 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
| 3583 | * chars is pretty simple, stuff as many as possible from the TX buffer |
| 3584 | * into the cd1400 FIFO. Must also handle TX breaks here, since they |
| 3585 | * are embedded as commands in the data stream. Oh no, had to use a goto! |
| 3586 | * This could be optimized more, will do when I get time... |
| 3587 | * In practice it is possible that interrupts are enabled but that the |
| 3588 | * port has been hung up. Need to handle not having any TX buffer here, |
| 3589 | * this is done by using the side effect that head and tail will also |
| 3590 | * be NULL if the buffer has been freed. |
| 3591 | */ |
| 3592 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3593 | static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3594 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3595 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3596 | int len, stlen; |
| 3597 | char *head, *tail; |
| 3598 | unsigned char ioack, srer; |
| 3599 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3600 | pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3601 | |
| 3602 | ioack = inb(ioaddr + EREG_TXACK); |
| 3603 | if (((ioack & panelp->ackmask) != 0) || |
| 3604 | ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { |
| 3605 | printk("STALLION: bad TX interrupt ack value=%x\n", ioack); |
| 3606 | return; |
| 3607 | } |
| 3608 | portp = panelp->ports[(ioack >> 3)]; |
| 3609 | |
| 3610 | /* |
| 3611 | * Unfortunately we need to handle breaks in the data stream, since |
| 3612 | * this is the only way to generate them on the cd1400. Do it now if |
| 3613 | * a break is to be sent. |
| 3614 | */ |
| 3615 | if (portp->brklen != 0) |
| 3616 | if (stl_cd1400breakisr(portp, ioaddr)) |
| 3617 | goto stl_txalldone; |
| 3618 | |
| 3619 | head = portp->tx.head; |
| 3620 | tail = portp->tx.tail; |
| 3621 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 3622 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
| 3623 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| 3624 | set_bit(ASYI_TXLOW, &portp->istate); |
| 3625 | schedule_work(&portp->tqueue); |
| 3626 | } |
| 3627 | |
| 3628 | if (len == 0) { |
| 3629 | outb((SRER + portp->uartaddr), ioaddr); |
| 3630 | srer = inb(ioaddr + EREG_DATA); |
| 3631 | if (srer & SRER_TXDATA) { |
| 3632 | srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; |
| 3633 | } else { |
| 3634 | srer &= ~(SRER_TXDATA | SRER_TXEMPTY); |
| 3635 | clear_bit(ASYI_TXBUSY, &portp->istate); |
| 3636 | } |
| 3637 | outb(srer, (ioaddr + EREG_DATA)); |
| 3638 | } else { |
| 3639 | len = MIN(len, CD1400_TXFIFOSIZE); |
| 3640 | portp->stats.txtotal += len; |
| 3641 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
| 3642 | outb((TDR + portp->uartaddr), ioaddr); |
| 3643 | outsb((ioaddr + EREG_DATA), tail, stlen); |
| 3644 | len -= stlen; |
| 3645 | tail += stlen; |
| 3646 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 3647 | tail = portp->tx.buf; |
| 3648 | if (len > 0) { |
| 3649 | outsb((ioaddr + EREG_DATA), tail, len); |
| 3650 | tail += len; |
| 3651 | } |
| 3652 | portp->tx.tail = tail; |
| 3653 | } |
| 3654 | |
| 3655 | stl_txalldone: |
| 3656 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3657 | outb(0, (ioaddr + EREG_DATA)); |
| 3658 | } |
| 3659 | |
| 3660 | /*****************************************************************************/ |
| 3661 | |
| 3662 | /* |
| 3663 | * Receive character interrupt handler. Determine if we have good chars |
| 3664 | * or bad chars and then process appropriately. Good chars are easy |
| 3665 | * just shove the lot into the RX buffer and set all status byte to 0. |
| 3666 | * If a bad RX char then process as required. This routine needs to be |
| 3667 | * fast! In practice it is possible that we get an interrupt on a port |
| 3668 | * that is closed. This can happen on hangups - since they completely |
| 3669 | * shutdown a port not in user context. Need to handle this case. |
| 3670 | */ |
| 3671 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3672 | static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3673 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3674 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3675 | struct tty_struct *tty; |
| 3676 | unsigned int ioack, len, buflen; |
| 3677 | unsigned char status; |
| 3678 | char ch; |
| 3679 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3680 | pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3681 | |
| 3682 | ioack = inb(ioaddr + EREG_RXACK); |
| 3683 | if ((ioack & panelp->ackmask) != 0) { |
| 3684 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| 3685 | return; |
| 3686 | } |
| 3687 | portp = panelp->ports[(ioack >> 3)]; |
| 3688 | tty = portp->tty; |
| 3689 | |
| 3690 | if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { |
| 3691 | outb((RDCR + portp->uartaddr), ioaddr); |
| 3692 | len = inb(ioaddr + EREG_DATA); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3693 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3694 | len = MIN(len, sizeof(stl_unwanted)); |
| 3695 | outb((RDSR + portp->uartaddr), ioaddr); |
| 3696 | insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); |
| 3697 | portp->stats.rxlost += len; |
| 3698 | portp->stats.rxtotal += len; |
| 3699 | } else { |
| 3700 | len = MIN(len, buflen); |
| 3701 | if (len > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3702 | unsigned char *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3703 | outb((RDSR + portp->uartaddr), ioaddr); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3704 | tty_prepare_flip_string(tty, &ptr, len); |
| 3705 | insb((ioaddr + EREG_DATA), ptr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3706 | tty_schedule_flip(tty); |
| 3707 | portp->stats.rxtotal += len; |
| 3708 | } |
| 3709 | } |
| 3710 | } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { |
| 3711 | outb((RDSR + portp->uartaddr), ioaddr); |
| 3712 | status = inb(ioaddr + EREG_DATA); |
| 3713 | ch = inb(ioaddr + EREG_DATA); |
| 3714 | if (status & ST_PARITY) |
| 3715 | portp->stats.rxparity++; |
| 3716 | if (status & ST_FRAMING) |
| 3717 | portp->stats.rxframing++; |
| 3718 | if (status & ST_OVERRUN) |
| 3719 | portp->stats.rxoverrun++; |
| 3720 | if (status & ST_BREAK) |
| 3721 | portp->stats.rxbreaks++; |
| 3722 | if (status & ST_SCHARMASK) { |
| 3723 | if ((status & ST_SCHARMASK) == ST_SCHAR1) |
| 3724 | portp->stats.txxon++; |
| 3725 | if ((status & ST_SCHARMASK) == ST_SCHAR2) |
| 3726 | portp->stats.txxoff++; |
| 3727 | goto stl_rxalldone; |
| 3728 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3729 | if (tty != NULL && (portp->rxignoremsk & status) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3730 | if (portp->rxmarkmsk & status) { |
| 3731 | if (status & ST_BREAK) { |
| 3732 | status = TTY_BREAK; |
| 3733 | if (portp->flags & ASYNC_SAK) { |
| 3734 | do_SAK(tty); |
| 3735 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3736 | } |
| 3737 | } else if (status & ST_PARITY) { |
| 3738 | status = TTY_PARITY; |
| 3739 | } else if (status & ST_FRAMING) { |
| 3740 | status = TTY_FRAME; |
| 3741 | } else if(status & ST_OVERRUN) { |
| 3742 | status = TTY_OVERRUN; |
| 3743 | } else { |
| 3744 | status = 0; |
| 3745 | } |
| 3746 | } else { |
| 3747 | status = 0; |
| 3748 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 3749 | tty_insert_flip_char(tty, ch, status); |
| 3750 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3751 | } |
| 3752 | } else { |
| 3753 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| 3754 | return; |
| 3755 | } |
| 3756 | |
| 3757 | stl_rxalldone: |
| 3758 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3759 | outb(0, (ioaddr + EREG_DATA)); |
| 3760 | } |
| 3761 | |
| 3762 | /*****************************************************************************/ |
| 3763 | |
| 3764 | /* |
| 3765 | * Modem interrupt handler. The is called when the modem signal line |
| 3766 | * (DCD) has changed state. Leave most of the work to the off-level |
| 3767 | * processing routine. |
| 3768 | */ |
| 3769 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3770 | static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3771 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3772 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3773 | unsigned int ioack; |
| 3774 | unsigned char misr; |
| 3775 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3776 | pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3777 | |
| 3778 | ioack = inb(ioaddr + EREG_MDACK); |
| 3779 | if (((ioack & panelp->ackmask) != 0) || |
| 3780 | ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { |
| 3781 | printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); |
| 3782 | return; |
| 3783 | } |
| 3784 | portp = panelp->ports[(ioack >> 3)]; |
| 3785 | |
| 3786 | outb((MISR + portp->uartaddr), ioaddr); |
| 3787 | misr = inb(ioaddr + EREG_DATA); |
| 3788 | if (misr & MISR_DCD) { |
| 3789 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
| 3790 | schedule_work(&portp->tqueue); |
| 3791 | portp->stats.modem++; |
| 3792 | } |
| 3793 | |
| 3794 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3795 | outb(0, (ioaddr + EREG_DATA)); |
| 3796 | } |
| 3797 | |
| 3798 | /*****************************************************************************/ |
| 3799 | /* SC26198 HARDWARE FUNCTIONS */ |
| 3800 | /*****************************************************************************/ |
| 3801 | |
| 3802 | /* |
| 3803 | * These functions get/set/update the registers of the sc26198 UARTs. |
| 3804 | * Access to the sc26198 registers is via an address/data io port pair. |
| 3805 | * (Maybe should make this inline...) |
| 3806 | */ |
| 3807 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3808 | static int stl_sc26198getreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3809 | { |
| 3810 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3811 | return inb(portp->ioaddr + XP_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3812 | } |
| 3813 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3814 | static void stl_sc26198setreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3815 | { |
| 3816 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| 3817 | outb(value, (portp->ioaddr + XP_DATA)); |
| 3818 | } |
| 3819 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3820 | static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3821 | { |
| 3822 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| 3823 | if (inb(portp->ioaddr + XP_DATA) != value) { |
| 3824 | outb(value, (portp->ioaddr + XP_DATA)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3825 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3826 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3827 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3828 | } |
| 3829 | |
| 3830 | /*****************************************************************************/ |
| 3831 | |
| 3832 | /* |
| 3833 | * Functions to get and set the sc26198 global registers. |
| 3834 | */ |
| 3835 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3836 | static int stl_sc26198getglobreg(struct stlport *portp, int regnr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3837 | { |
| 3838 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3839 | return inb(portp->ioaddr + XP_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | } |
| 3841 | |
| 3842 | #if 0 |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3843 | static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3844 | { |
| 3845 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
| 3846 | outb(value, (portp->ioaddr + XP_DATA)); |
| 3847 | } |
| 3848 | #endif |
| 3849 | |
| 3850 | /*****************************************************************************/ |
| 3851 | |
| 3852 | /* |
| 3853 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
| 3854 | * these ports are on - since the port io registers are almost |
| 3855 | * identical when dealing with ports. |
| 3856 | */ |
| 3857 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3858 | static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3859 | { |
| 3860 | int chipmask, i; |
| 3861 | int nrchips, ioaddr; |
| 3862 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3863 | pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3864 | |
| 3865 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
| 3866 | |
| 3867 | /* |
| 3868 | * Check that each chip is present and started up OK. |
| 3869 | */ |
| 3870 | chipmask = 0; |
| 3871 | nrchips = (panelp->nrports + 4) / SC26198_PORTS; |
| 3872 | if (brdp->brdtype == BRD_ECHPCI) |
| 3873 | outb(panelp->pagenr, brdp->ioctrl); |
| 3874 | |
| 3875 | for (i = 0; (i < nrchips); i++) { |
| 3876 | ioaddr = panelp->iobase + (i * 4); |
| 3877 | outb(SCCR, (ioaddr + XP_ADDR)); |
| 3878 | outb(CR_RESETALL, (ioaddr + XP_DATA)); |
| 3879 | outb(TSTR, (ioaddr + XP_ADDR)); |
| 3880 | if (inb(ioaddr + XP_DATA) != 0) { |
| 3881 | printk("STALLION: sc26198 not responding, " |
| 3882 | "brd=%d panel=%d chip=%d\n", |
| 3883 | panelp->brdnr, panelp->panelnr, i); |
| 3884 | continue; |
| 3885 | } |
| 3886 | chipmask |= (0x1 << i); |
| 3887 | outb(GCCR, (ioaddr + XP_ADDR)); |
| 3888 | outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); |
| 3889 | outb(WDTRCR, (ioaddr + XP_ADDR)); |
| 3890 | outb(0xff, (ioaddr + XP_DATA)); |
| 3891 | } |
| 3892 | |
| 3893 | BRDDISABLE(panelp->brdnr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3894 | return chipmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3895 | } |
| 3896 | |
| 3897 | /*****************************************************************************/ |
| 3898 | |
| 3899 | /* |
| 3900 | * Initialize hardware specific port registers. |
| 3901 | */ |
| 3902 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3903 | 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] | 3904 | { |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 3905 | pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp, |
| 3906 | panelp, portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3907 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3908 | if ((brdp == NULL) || (panelp == NULL) || |
| 3909 | (portp == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3910 | return; |
| 3911 | |
| 3912 | portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); |
| 3913 | portp->uartaddr = (portp->portnr & 0x07) << 4; |
| 3914 | portp->pagenr = panelp->pagenr; |
| 3915 | portp->hwid = 0x1; |
| 3916 | |
| 3917 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3918 | stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); |
| 3919 | BRDDISABLE(portp->brdnr); |
| 3920 | } |
| 3921 | |
| 3922 | /*****************************************************************************/ |
| 3923 | |
| 3924 | /* |
| 3925 | * Set up the sc26198 registers for a port based on the termios port |
| 3926 | * settings. |
| 3927 | */ |
| 3928 | |
Alan Cox | 606d099 | 2006-12-08 02:38:45 -0800 | [diff] [blame] | 3929 | static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3930 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 3931 | struct stlbrd *brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3932 | unsigned long flags; |
| 3933 | unsigned int baudrate; |
| 3934 | unsigned char mr0, mr1, mr2, clk; |
| 3935 | unsigned char imron, imroff, iopr, ipr; |
| 3936 | |
| 3937 | mr0 = 0; |
| 3938 | mr1 = 0; |
| 3939 | mr2 = 0; |
| 3940 | clk = 0; |
| 3941 | iopr = 0; |
| 3942 | imron = 0; |
| 3943 | imroff = 0; |
| 3944 | |
| 3945 | brdp = stl_brds[portp->brdnr]; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 3946 | if (brdp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | return; |
| 3948 | |
| 3949 | /* |
| 3950 | * Set up the RX char ignore mask with those RX error types we |
| 3951 | * can ignore. |
| 3952 | */ |
| 3953 | portp->rxignoremsk = 0; |
| 3954 | if (tiosp->c_iflag & IGNPAR) |
| 3955 | portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | |
| 3956 | SR_RXOVERRUN); |
| 3957 | if (tiosp->c_iflag & IGNBRK) |
| 3958 | portp->rxignoremsk |= SR_RXBREAK; |
| 3959 | |
| 3960 | portp->rxmarkmsk = SR_RXOVERRUN; |
| 3961 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
| 3962 | portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); |
| 3963 | if (tiosp->c_iflag & BRKINT) |
| 3964 | portp->rxmarkmsk |= SR_RXBREAK; |
| 3965 | |
| 3966 | /* |
| 3967 | * Go through the char size, parity and stop bits and set all the |
| 3968 | * option register appropriately. |
| 3969 | */ |
| 3970 | switch (tiosp->c_cflag & CSIZE) { |
| 3971 | case CS5: |
| 3972 | mr1 |= MR1_CS5; |
| 3973 | break; |
| 3974 | case CS6: |
| 3975 | mr1 |= MR1_CS6; |
| 3976 | break; |
| 3977 | case CS7: |
| 3978 | mr1 |= MR1_CS7; |
| 3979 | break; |
| 3980 | default: |
| 3981 | mr1 |= MR1_CS8; |
| 3982 | break; |
| 3983 | } |
| 3984 | |
| 3985 | if (tiosp->c_cflag & CSTOPB) |
| 3986 | mr2 |= MR2_STOP2; |
| 3987 | else |
| 3988 | mr2 |= MR2_STOP1; |
| 3989 | |
| 3990 | if (tiosp->c_cflag & PARENB) { |
| 3991 | if (tiosp->c_cflag & PARODD) |
| 3992 | mr1 |= (MR1_PARENB | MR1_PARODD); |
| 3993 | else |
| 3994 | mr1 |= (MR1_PARENB | MR1_PAREVEN); |
| 3995 | } else { |
| 3996 | mr1 |= MR1_PARNONE; |
| 3997 | } |
| 3998 | |
| 3999 | mr1 |= MR1_ERRBLOCK; |
| 4000 | |
| 4001 | /* |
| 4002 | * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing |
| 4003 | * space for hardware flow control and the like. This should be set to |
| 4004 | * VMIN. |
| 4005 | */ |
| 4006 | mr2 |= MR2_RXFIFOHALF; |
| 4007 | |
| 4008 | /* |
| 4009 | * Calculate the baud rate timers. For now we will just assume that |
| 4010 | * the input and output baud are the same. The sc26198 has a fixed |
| 4011 | * baud rate table, so only discrete baud rates possible. |
| 4012 | */ |
| 4013 | baudrate = tiosp->c_cflag & CBAUD; |
| 4014 | if (baudrate & CBAUDEX) { |
| 4015 | baudrate &= ~CBAUDEX; |
| 4016 | if ((baudrate < 1) || (baudrate > 4)) |
| 4017 | tiosp->c_cflag &= ~CBAUDEX; |
| 4018 | else |
| 4019 | baudrate += 15; |
| 4020 | } |
| 4021 | baudrate = stl_baudrates[baudrate]; |
| 4022 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
| 4023 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 4024 | baudrate = 57600; |
| 4025 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 4026 | baudrate = 115200; |
| 4027 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 4028 | baudrate = 230400; |
| 4029 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 4030 | baudrate = 460800; |
| 4031 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| 4032 | baudrate = (portp->baud_base / portp->custom_divisor); |
| 4033 | } |
| 4034 | if (baudrate > STL_SC26198MAXBAUD) |
| 4035 | baudrate = STL_SC26198MAXBAUD; |
| 4036 | |
| 4037 | if (baudrate > 0) { |
| 4038 | for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { |
| 4039 | if (baudrate <= sc26198_baudtable[clk]) |
| 4040 | break; |
| 4041 | } |
| 4042 | } |
| 4043 | |
| 4044 | /* |
| 4045 | * Check what form of modem signaling is required and set it up. |
| 4046 | */ |
| 4047 | if (tiosp->c_cflag & CLOCAL) { |
| 4048 | portp->flags &= ~ASYNC_CHECK_CD; |
| 4049 | } else { |
| 4050 | iopr |= IOPR_DCDCOS; |
| 4051 | imron |= IR_IOPORT; |
| 4052 | portp->flags |= ASYNC_CHECK_CD; |
| 4053 | } |
| 4054 | |
| 4055 | /* |
| 4056 | * Setup sc26198 enhanced modes if we can. In particular we want to |
| 4057 | * handle as much of the flow control as possible automatically. As |
| 4058 | * well as saving a few CPU cycles it will also greatly improve flow |
| 4059 | * control reliability. |
| 4060 | */ |
| 4061 | if (tiosp->c_iflag & IXON) { |
| 4062 | mr0 |= MR0_SWFTX | MR0_SWFT; |
| 4063 | imron |= IR_XONXOFF; |
| 4064 | } else { |
| 4065 | imroff |= IR_XONXOFF; |
| 4066 | } |
| 4067 | if (tiosp->c_iflag & IXOFF) |
| 4068 | mr0 |= MR0_SWFRX; |
| 4069 | |
| 4070 | if (tiosp->c_cflag & CRTSCTS) { |
| 4071 | mr2 |= MR2_AUTOCTS; |
| 4072 | mr1 |= MR1_AUTORTS; |
| 4073 | } |
| 4074 | |
| 4075 | /* |
| 4076 | * All sc26198 register values calculated so go through and set |
| 4077 | * them all up. |
| 4078 | */ |
| 4079 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4080 | pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4081 | portp->portnr, portp->panelnr, portp->brdnr); |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4082 | pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); |
| 4083 | pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); |
| 4084 | pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4085 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| 4086 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4087 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4088 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4089 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4090 | stl_sc26198setreg(portp, IMR, 0); |
| 4091 | stl_sc26198updatereg(portp, MR0, mr0); |
| 4092 | stl_sc26198updatereg(portp, MR1, mr1); |
| 4093 | stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); |
| 4094 | stl_sc26198updatereg(portp, MR2, mr2); |
| 4095 | stl_sc26198updatereg(portp, IOPIOR, |
| 4096 | ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); |
| 4097 | |
| 4098 | if (baudrate > 0) { |
| 4099 | stl_sc26198setreg(portp, TXCSR, clk); |
| 4100 | stl_sc26198setreg(portp, RXCSR, clk); |
| 4101 | } |
| 4102 | |
| 4103 | stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); |
| 4104 | stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); |
| 4105 | |
| 4106 | ipr = stl_sc26198getreg(portp, IPR); |
| 4107 | if (ipr & IPR_DCD) |
| 4108 | portp->sigs &= ~TIOCM_CD; |
| 4109 | else |
| 4110 | portp->sigs |= TIOCM_CD; |
| 4111 | |
| 4112 | portp->imr = (portp->imr & ~imroff) | imron; |
| 4113 | stl_sc26198setreg(portp, IMR, portp->imr); |
| 4114 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4115 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4116 | } |
| 4117 | |
| 4118 | /*****************************************************************************/ |
| 4119 | |
| 4120 | /* |
| 4121 | * Set the state of the DTR and RTS signals. |
| 4122 | */ |
| 4123 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4124 | static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4125 | { |
| 4126 | unsigned char iopioron, iopioroff; |
| 4127 | unsigned long flags; |
| 4128 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4129 | pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp, |
| 4130 | dtr, rts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4131 | |
| 4132 | iopioron = 0; |
| 4133 | iopioroff = 0; |
| 4134 | if (dtr == 0) |
| 4135 | iopioroff |= IPR_DTR; |
| 4136 | else if (dtr > 0) |
| 4137 | iopioron |= IPR_DTR; |
| 4138 | if (rts == 0) |
| 4139 | iopioroff |= IPR_RTS; |
| 4140 | else if (rts > 0) |
| 4141 | iopioron |= IPR_RTS; |
| 4142 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4143 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4144 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4145 | stl_sc26198setreg(portp, IOPIOR, |
| 4146 | ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); |
| 4147 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4148 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4149 | } |
| 4150 | |
| 4151 | /*****************************************************************************/ |
| 4152 | |
| 4153 | /* |
| 4154 | * Return the state of the signals. |
| 4155 | */ |
| 4156 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4157 | static int stl_sc26198getsignals(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4158 | { |
| 4159 | unsigned char ipr; |
| 4160 | unsigned long flags; |
| 4161 | int sigs; |
| 4162 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4163 | pr_debug("stl_sc26198getsignals(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4164 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4165 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4166 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4167 | ipr = stl_sc26198getreg(portp, IPR); |
| 4168 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4169 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4170 | |
| 4171 | sigs = 0; |
| 4172 | sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; |
| 4173 | sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; |
| 4174 | sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; |
| 4175 | sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; |
| 4176 | sigs |= TIOCM_DSR; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4177 | return sigs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4178 | } |
| 4179 | |
| 4180 | /*****************************************************************************/ |
| 4181 | |
| 4182 | /* |
| 4183 | * Enable/Disable the Transmitter and/or Receiver. |
| 4184 | */ |
| 4185 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4186 | static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4187 | { |
| 4188 | unsigned char ccr; |
| 4189 | unsigned long flags; |
| 4190 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4191 | 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] | 4192 | |
| 4193 | ccr = portp->crenable; |
| 4194 | if (tx == 0) |
| 4195 | ccr &= ~CR_TXENABLE; |
| 4196 | else if (tx > 0) |
| 4197 | ccr |= CR_TXENABLE; |
| 4198 | if (rx == 0) |
| 4199 | ccr &= ~CR_RXENABLE; |
| 4200 | else if (rx > 0) |
| 4201 | ccr |= CR_RXENABLE; |
| 4202 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4203 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4204 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4205 | stl_sc26198setreg(portp, SCCR, ccr); |
| 4206 | BRDDISABLE(portp->brdnr); |
| 4207 | portp->crenable = ccr; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4208 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4209 | } |
| 4210 | |
| 4211 | /*****************************************************************************/ |
| 4212 | |
| 4213 | /* |
| 4214 | * Start/stop the Transmitter and/or Receiver. |
| 4215 | */ |
| 4216 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4217 | static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4218 | { |
| 4219 | unsigned char imr; |
| 4220 | unsigned long flags; |
| 4221 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4222 | 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] | 4223 | |
| 4224 | imr = portp->imr; |
| 4225 | if (tx == 0) |
| 4226 | imr &= ~IR_TXRDY; |
| 4227 | else if (tx == 1) |
| 4228 | imr |= IR_TXRDY; |
| 4229 | if (rx == 0) |
| 4230 | imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); |
| 4231 | else if (rx > 0) |
| 4232 | imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; |
| 4233 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4234 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4235 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4236 | stl_sc26198setreg(portp, IMR, imr); |
| 4237 | BRDDISABLE(portp->brdnr); |
| 4238 | portp->imr = imr; |
| 4239 | if (tx > 0) |
| 4240 | set_bit(ASYI_TXBUSY, &portp->istate); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4241 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4242 | } |
| 4243 | |
| 4244 | /*****************************************************************************/ |
| 4245 | |
| 4246 | /* |
| 4247 | * Disable all interrupts from this port. |
| 4248 | */ |
| 4249 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4250 | static void stl_sc26198disableintrs(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | { |
| 4252 | unsigned long flags; |
| 4253 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4254 | pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4255 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4256 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4257 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4258 | portp->imr = 0; |
| 4259 | stl_sc26198setreg(portp, IMR, 0); |
| 4260 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4261 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4262 | } |
| 4263 | |
| 4264 | /*****************************************************************************/ |
| 4265 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4266 | static void stl_sc26198sendbreak(struct stlport *portp, int len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4267 | { |
| 4268 | unsigned long flags; |
| 4269 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4270 | pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4271 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4272 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4273 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4274 | if (len == 1) { |
| 4275 | stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); |
| 4276 | portp->stats.txbreaks++; |
| 4277 | } else { |
| 4278 | stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); |
| 4279 | } |
| 4280 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4281 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4282 | } |
| 4283 | |
| 4284 | /*****************************************************************************/ |
| 4285 | |
| 4286 | /* |
| 4287 | * Take flow control actions... |
| 4288 | */ |
| 4289 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4290 | static void stl_sc26198flowctrl(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4291 | { |
| 4292 | struct tty_struct *tty; |
| 4293 | unsigned long flags; |
| 4294 | unsigned char mr0; |
| 4295 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4296 | pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4297 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4298 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4299 | return; |
| 4300 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4301 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4302 | return; |
| 4303 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4304 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4305 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4306 | |
| 4307 | if (state) { |
| 4308 | if (tty->termios->c_iflag & IXOFF) { |
| 4309 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4310 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4311 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| 4312 | mr0 |= MR0_SWFRX; |
| 4313 | portp->stats.rxxon++; |
| 4314 | stl_sc26198wait(portp); |
| 4315 | stl_sc26198setreg(portp, MR0, mr0); |
| 4316 | } |
| 4317 | /* |
| 4318 | * Question: should we return RTS to what it was before? It may |
| 4319 | * have been set by an ioctl... Suppose not, since if you have |
| 4320 | * hardware flow control set then it is pretty silly to go and |
| 4321 | * set the RTS line by hand. |
| 4322 | */ |
| 4323 | if (tty->termios->c_cflag & CRTSCTS) { |
| 4324 | stl_sc26198setreg(portp, MR1, |
| 4325 | (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); |
| 4326 | stl_sc26198setreg(portp, IOPIOR, |
| 4327 | (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); |
| 4328 | portp->stats.rxrtson++; |
| 4329 | } |
| 4330 | } else { |
| 4331 | if (tty->termios->c_iflag & IXOFF) { |
| 4332 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4333 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4334 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| 4335 | mr0 &= ~MR0_SWFRX; |
| 4336 | portp->stats.rxxoff++; |
| 4337 | stl_sc26198wait(portp); |
| 4338 | stl_sc26198setreg(portp, MR0, mr0); |
| 4339 | } |
| 4340 | if (tty->termios->c_cflag & CRTSCTS) { |
| 4341 | stl_sc26198setreg(portp, MR1, |
| 4342 | (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); |
| 4343 | stl_sc26198setreg(portp, IOPIOR, |
| 4344 | (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); |
| 4345 | portp->stats.rxrtsoff++; |
| 4346 | } |
| 4347 | } |
| 4348 | |
| 4349 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4350 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4351 | } |
| 4352 | |
| 4353 | /*****************************************************************************/ |
| 4354 | |
| 4355 | /* |
| 4356 | * Send a flow control character. |
| 4357 | */ |
| 4358 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4359 | static void stl_sc26198sendflow(struct stlport *portp, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4360 | { |
| 4361 | struct tty_struct *tty; |
| 4362 | unsigned long flags; |
| 4363 | unsigned char mr0; |
| 4364 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4365 | pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4366 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4367 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4368 | return; |
| 4369 | tty = portp->tty; |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4370 | if (tty == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4371 | return; |
| 4372 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4373 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4374 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4375 | if (state) { |
| 4376 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4377 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4378 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| 4379 | mr0 |= MR0_SWFRX; |
| 4380 | portp->stats.rxxon++; |
| 4381 | stl_sc26198wait(portp); |
| 4382 | stl_sc26198setreg(portp, MR0, mr0); |
| 4383 | } else { |
| 4384 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4385 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4386 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| 4387 | mr0 &= ~MR0_SWFRX; |
| 4388 | portp->stats.rxxoff++; |
| 4389 | stl_sc26198wait(portp); |
| 4390 | stl_sc26198setreg(portp, MR0, mr0); |
| 4391 | } |
| 4392 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4393 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4394 | } |
| 4395 | |
| 4396 | /*****************************************************************************/ |
| 4397 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4398 | static void stl_sc26198flush(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4399 | { |
| 4400 | unsigned long flags; |
| 4401 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4402 | pr_debug("stl_sc26198flush(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4403 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4404 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4405 | return; |
| 4406 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4407 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4408 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4409 | stl_sc26198setreg(portp, SCCR, CR_TXRESET); |
| 4410 | stl_sc26198setreg(portp, SCCR, portp->crenable); |
| 4411 | BRDDISABLE(portp->brdnr); |
| 4412 | portp->tx.tail = portp->tx.head; |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4413 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4414 | } |
| 4415 | |
| 4416 | /*****************************************************************************/ |
| 4417 | |
| 4418 | /* |
| 4419 | * Return the current state of data flow on this port. This is only |
| 4420 | * really interresting when determining if data has fully completed |
| 4421 | * transmission or not... The sc26198 interrupt scheme cannot |
| 4422 | * determine when all data has actually drained, so we need to |
| 4423 | * check the port statusy register to be sure. |
| 4424 | */ |
| 4425 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4426 | static int stl_sc26198datastate(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4427 | { |
| 4428 | unsigned long flags; |
| 4429 | unsigned char sr; |
| 4430 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4431 | pr_debug("stl_sc26198datastate(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4432 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4433 | if (portp == NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4434 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4435 | if (test_bit(ASYI_TXBUSY, &portp->istate)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4436 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4437 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4438 | spin_lock_irqsave(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4439 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4440 | sr = stl_sc26198getreg(portp, SR); |
| 4441 | BRDDISABLE(portp->brdnr); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4442 | spin_unlock_irqrestore(&brd_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4443 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4444 | return (sr & SR_TXEMPTY) ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4445 | } |
| 4446 | |
| 4447 | /*****************************************************************************/ |
| 4448 | |
| 4449 | /* |
| 4450 | * Delay for a small amount of time, to give the sc26198 a chance |
| 4451 | * to process a command... |
| 4452 | */ |
| 4453 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4454 | static void stl_sc26198wait(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4455 | { |
| 4456 | int i; |
| 4457 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4458 | pr_debug("stl_sc26198wait(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4459 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4460 | if (portp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4461 | return; |
| 4462 | |
| 4463 | for (i = 0; (i < 20); i++) |
| 4464 | stl_sc26198getglobreg(portp, TSTR); |
| 4465 | } |
| 4466 | |
| 4467 | /*****************************************************************************/ |
| 4468 | |
| 4469 | /* |
| 4470 | * If we are TX flow controlled and in IXANY mode then we may |
| 4471 | * need to unflow control here. We gotta do this because of the |
| 4472 | * automatic flow control modes of the sc26198. |
| 4473 | */ |
| 4474 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4475 | static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4476 | { |
| 4477 | unsigned char mr0; |
| 4478 | |
| 4479 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4480 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4481 | stl_sc26198setreg(portp, SCCR, CR_HOSTXON); |
| 4482 | stl_sc26198wait(portp); |
| 4483 | stl_sc26198setreg(portp, MR0, mr0); |
| 4484 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
| 4485 | } |
| 4486 | |
| 4487 | /*****************************************************************************/ |
| 4488 | |
| 4489 | /* |
| 4490 | * Interrupt service routine for sc26198 panels. |
| 4491 | */ |
| 4492 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4493 | static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4494 | { |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4495 | struct stlport *portp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4496 | unsigned int iack; |
| 4497 | |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4498 | spin_lock(&brd_lock); |
| 4499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4500 | /* |
| 4501 | * Work around bug in sc26198 chip... Cannot have A6 address |
| 4502 | * line of UART high, else iack will be returned as 0. |
| 4503 | */ |
| 4504 | outb(0, (iobase + 1)); |
| 4505 | |
| 4506 | iack = inb(iobase + XP_IACK); |
| 4507 | portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; |
| 4508 | |
| 4509 | if (iack & IVR_RXDATA) |
| 4510 | stl_sc26198rxisr(portp, iack); |
| 4511 | else if (iack & IVR_TXDATA) |
| 4512 | stl_sc26198txisr(portp); |
| 4513 | else |
| 4514 | stl_sc26198otherisr(portp, iack); |
Alan Cox | b65b5b5 | 2006-06-27 02:54:05 -0700 | [diff] [blame] | 4515 | |
| 4516 | spin_unlock(&brd_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4517 | } |
| 4518 | |
| 4519 | /*****************************************************************************/ |
| 4520 | |
| 4521 | /* |
| 4522 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
| 4523 | * chars is pretty simple, stuff as many as possible from the TX buffer |
| 4524 | * into the sc26198 FIFO. |
| 4525 | * In practice it is possible that interrupts are enabled but that the |
| 4526 | * port has been hung up. Need to handle not having any TX buffer here, |
| 4527 | * this is done by using the side effect that head and tail will also |
| 4528 | * be NULL if the buffer has been freed. |
| 4529 | */ |
| 4530 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4531 | static void stl_sc26198txisr(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4532 | { |
| 4533 | unsigned int ioaddr; |
| 4534 | unsigned char mr0; |
| 4535 | int len, stlen; |
| 4536 | char *head, *tail; |
| 4537 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4538 | pr_debug("stl_sc26198txisr(portp=%p)\n", portp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4539 | |
| 4540 | ioaddr = portp->ioaddr; |
| 4541 | head = portp->tx.head; |
| 4542 | tail = portp->tx.tail; |
| 4543 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 4544 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
| 4545 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| 4546 | set_bit(ASYI_TXLOW, &portp->istate); |
| 4547 | schedule_work(&portp->tqueue); |
| 4548 | } |
| 4549 | |
| 4550 | if (len == 0) { |
| 4551 | outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); |
| 4552 | mr0 = inb(ioaddr + XP_DATA); |
| 4553 | if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { |
| 4554 | portp->imr &= ~IR_TXRDY; |
| 4555 | outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); |
| 4556 | outb(portp->imr, (ioaddr + XP_DATA)); |
| 4557 | clear_bit(ASYI_TXBUSY, &portp->istate); |
| 4558 | } else { |
| 4559 | mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); |
| 4560 | outb(mr0, (ioaddr + XP_DATA)); |
| 4561 | } |
| 4562 | } else { |
| 4563 | len = MIN(len, SC26198_TXFIFOSIZE); |
| 4564 | portp->stats.txtotal += len; |
| 4565 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
| 4566 | outb(GTXFIFO, (ioaddr + XP_ADDR)); |
| 4567 | outsb((ioaddr + XP_DATA), tail, stlen); |
| 4568 | len -= stlen; |
| 4569 | tail += stlen; |
| 4570 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 4571 | tail = portp->tx.buf; |
| 4572 | if (len > 0) { |
| 4573 | outsb((ioaddr + XP_DATA), tail, len); |
| 4574 | tail += len; |
| 4575 | } |
| 4576 | portp->tx.tail = tail; |
| 4577 | } |
| 4578 | } |
| 4579 | |
| 4580 | /*****************************************************************************/ |
| 4581 | |
| 4582 | /* |
| 4583 | * Receive character interrupt handler. Determine if we have good chars |
| 4584 | * or bad chars and then process appropriately. Good chars are easy |
| 4585 | * just shove the lot into the RX buffer and set all status byte to 0. |
| 4586 | * If a bad RX char then process as required. This routine needs to be |
| 4587 | * fast! In practice it is possible that we get an interrupt on a port |
| 4588 | * that is closed. This can happen on hangups - since they completely |
| 4589 | * shutdown a port not in user context. Need to handle this case. |
| 4590 | */ |
| 4591 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4592 | static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4593 | { |
| 4594 | struct tty_struct *tty; |
| 4595 | unsigned int len, buflen, ioaddr; |
| 4596 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4597 | pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4598 | |
| 4599 | tty = portp->tty; |
| 4600 | ioaddr = portp->ioaddr; |
| 4601 | outb(GIBCR, (ioaddr + XP_ADDR)); |
| 4602 | len = inb(ioaddr + XP_DATA) + 1; |
| 4603 | |
| 4604 | if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4605 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4606 | len = MIN(len, sizeof(stl_unwanted)); |
| 4607 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
| 4608 | insb((ioaddr + XP_DATA), &stl_unwanted[0], len); |
| 4609 | portp->stats.rxlost += len; |
| 4610 | portp->stats.rxtotal += len; |
| 4611 | } else { |
| 4612 | len = MIN(len, buflen); |
| 4613 | if (len > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4614 | unsigned char *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4615 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4616 | tty_prepare_flip_string(tty, &ptr, len); |
| 4617 | insb((ioaddr + XP_DATA), ptr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4618 | tty_schedule_flip(tty); |
| 4619 | portp->stats.rxtotal += len; |
| 4620 | } |
| 4621 | } |
| 4622 | } else { |
| 4623 | stl_sc26198rxbadchars(portp); |
| 4624 | } |
| 4625 | |
| 4626 | /* |
| 4627 | * If we are TX flow controlled and in IXANY mode then we may need |
| 4628 | * to unflow control here. We gotta do this because of the automatic |
| 4629 | * flow control modes of the sc26198. |
| 4630 | */ |
| 4631 | if (test_bit(ASYI_TXFLOWED, &portp->istate)) { |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4632 | if ((tty != NULL) && |
| 4633 | (tty->termios != NULL) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4634 | (tty->termios->c_iflag & IXANY)) { |
| 4635 | stl_sc26198txunflow(portp, tty); |
| 4636 | } |
| 4637 | } |
| 4638 | } |
| 4639 | |
| 4640 | /*****************************************************************************/ |
| 4641 | |
| 4642 | /* |
| 4643 | * Process an RX bad character. |
| 4644 | */ |
| 4645 | |
Jiri Slaby | 60be481 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4646 | static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4647 | { |
| 4648 | struct tty_struct *tty; |
| 4649 | unsigned int ioaddr; |
| 4650 | |
| 4651 | tty = portp->tty; |
| 4652 | ioaddr = portp->ioaddr; |
| 4653 | |
| 4654 | if (status & SR_RXPARITY) |
| 4655 | portp->stats.rxparity++; |
| 4656 | if (status & SR_RXFRAMING) |
| 4657 | portp->stats.rxframing++; |
| 4658 | if (status & SR_RXOVERRUN) |
| 4659 | portp->stats.rxoverrun++; |
| 4660 | if (status & SR_RXBREAK) |
| 4661 | portp->stats.rxbreaks++; |
| 4662 | |
Jiri Slaby | 615e4a7 | 2006-12-08 02:38:38 -0800 | [diff] [blame] | 4663 | if ((tty != NULL) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4664 | ((portp->rxignoremsk & status) == 0)) { |
| 4665 | if (portp->rxmarkmsk & status) { |
| 4666 | if (status & SR_RXBREAK) { |
| 4667 | status = TTY_BREAK; |
| 4668 | if (portp->flags & ASYNC_SAK) { |
| 4669 | do_SAK(tty); |
| 4670 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4671 | } |
| 4672 | } else if (status & SR_RXPARITY) { |
| 4673 | status = TTY_PARITY; |
| 4674 | } else if (status & SR_RXFRAMING) { |
| 4675 | status = TTY_FRAME; |
| 4676 | } else if(status & SR_RXOVERRUN) { |
| 4677 | status = TTY_OVERRUN; |
| 4678 | } else { |
| 4679 | status = 0; |
| 4680 | } |
| 4681 | } else { |
| 4682 | status = 0; |
| 4683 | } |
| 4684 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4685 | tty_insert_flip_char(tty, ch, status); |
| 4686 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4687 | |
| 4688 | if (status == 0) |
| 4689 | portp->stats.rxtotal++; |
| 4690 | } |
| 4691 | } |
| 4692 | |
| 4693 | /*****************************************************************************/ |
| 4694 | |
| 4695 | /* |
| 4696 | * Process all characters in the RX FIFO of the UART. Check all char |
| 4697 | * status bytes as well, and process as required. We need to check |
| 4698 | * all bytes in the FIFO, in case some more enter the FIFO while we |
| 4699 | * are here. To get the exact character error type we need to switch |
| 4700 | * into CHAR error mode (that is why we need to make sure we empty |
| 4701 | * the FIFO). |
| 4702 | */ |
| 4703 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4704 | static void stl_sc26198rxbadchars(struct stlport *portp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4705 | { |
| 4706 | unsigned char status, mr1; |
| 4707 | char ch; |
| 4708 | |
| 4709 | /* |
| 4710 | * To get the precise error type for each character we must switch |
| 4711 | * back into CHAR error mode. |
| 4712 | */ |
| 4713 | mr1 = stl_sc26198getreg(portp, MR1); |
| 4714 | stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); |
| 4715 | |
| 4716 | while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { |
| 4717 | stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); |
| 4718 | ch = stl_sc26198getreg(portp, RXFIFO); |
| 4719 | stl_sc26198rxbadch(portp, status, ch); |
| 4720 | } |
| 4721 | |
| 4722 | /* |
| 4723 | * To get correct interrupt class we must switch back into BLOCK |
| 4724 | * error mode. |
| 4725 | */ |
| 4726 | stl_sc26198setreg(portp, MR1, mr1); |
| 4727 | } |
| 4728 | |
| 4729 | /*****************************************************************************/ |
| 4730 | |
| 4731 | /* |
| 4732 | * Other interrupt handler. This includes modem signals, flow |
| 4733 | * control actions, etc. Most stuff is left to off-level interrupt |
| 4734 | * processing time. |
| 4735 | */ |
| 4736 | |
Jiri Slaby | ca7ed0f | 2006-12-08 02:38:39 -0800 | [diff] [blame] | 4737 | static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4738 | { |
| 4739 | unsigned char cir, ipr, xisr; |
| 4740 | |
Jiri Slaby | a0564e1 | 2006-12-08 02:38:37 -0800 | [diff] [blame] | 4741 | pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4742 | |
| 4743 | cir = stl_sc26198getglobreg(portp, CIR); |
| 4744 | |
| 4745 | switch (cir & CIR_SUBTYPEMASK) { |
| 4746 | case CIR_SUBCOS: |
| 4747 | ipr = stl_sc26198getreg(portp, IPR); |
| 4748 | if (ipr & IPR_DCDCHANGE) { |
| 4749 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
| 4750 | schedule_work(&portp->tqueue); |
| 4751 | portp->stats.modem++; |
| 4752 | } |
| 4753 | break; |
| 4754 | case CIR_SUBXONXOFF: |
| 4755 | xisr = stl_sc26198getreg(portp, XISR); |
| 4756 | if (xisr & XISR_RXXONGOT) { |
| 4757 | set_bit(ASYI_TXFLOWED, &portp->istate); |
| 4758 | portp->stats.txxoff++; |
| 4759 | } |
| 4760 | if (xisr & XISR_RXXOFFGOT) { |
| 4761 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
| 4762 | portp->stats.txxon++; |
| 4763 | } |
| 4764 | break; |
| 4765 | case CIR_SUBBREAK: |
| 4766 | stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); |
| 4767 | stl_sc26198rxbadchars(portp); |
| 4768 | break; |
| 4769 | default: |
| 4770 | break; |
| 4771 | } |
| 4772 | } |
| 4773 | |
Jiri Slaby | 23b85a1 | 2006-12-08 02:38:40 -0800 | [diff] [blame] | 4774 | /* |
| 4775 | * Loadable module initialization stuff. |
| 4776 | */ |
| 4777 | static int __init stallion_module_init(void) |
| 4778 | { |
| 4779 | unsigned int i; |
| 4780 | |
| 4781 | printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); |
| 4782 | |
| 4783 | spin_lock_init(&stallion_lock); |
| 4784 | spin_lock_init(&brd_lock); |
| 4785 | |
| 4786 | stl_initbrds(); |
| 4787 | |
| 4788 | stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); |
| 4789 | if (!stl_serial) |
| 4790 | return -1; |
| 4791 | |
| 4792 | /* |
| 4793 | * Set up a character driver for per board stuff. This is mainly used |
| 4794 | * to do stats ioctls on the ports. |
| 4795 | */ |
| 4796 | if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) |
| 4797 | printk("STALLION: failed to register serial board device\n"); |
| 4798 | |
| 4799 | stallion_class = class_create(THIS_MODULE, "staliomem"); |
| 4800 | for (i = 0; i < 4; i++) |
| 4801 | class_device_create(stallion_class, NULL, |
| 4802 | MKDEV(STL_SIOMEMMAJOR, i), NULL, |
| 4803 | "staliomem%d", i); |
| 4804 | |
| 4805 | stl_serial->owner = THIS_MODULE; |
| 4806 | stl_serial->driver_name = stl_drvname; |
| 4807 | stl_serial->name = "ttyE"; |
| 4808 | stl_serial->major = STL_SERIALMAJOR; |
| 4809 | stl_serial->minor_start = 0; |
| 4810 | stl_serial->type = TTY_DRIVER_TYPE_SERIAL; |
| 4811 | stl_serial->subtype = SERIAL_TYPE_NORMAL; |
| 4812 | stl_serial->init_termios = stl_deftermios; |
| 4813 | stl_serial->flags = TTY_DRIVER_REAL_RAW; |
| 4814 | tty_set_operations(stl_serial, &stl_ops); |
| 4815 | |
| 4816 | if (tty_register_driver(stl_serial)) { |
| 4817 | put_tty_driver(stl_serial); |
| 4818 | printk("STALLION: failed to register serial driver\n"); |
| 4819 | return -1; |
| 4820 | } |
| 4821 | |
| 4822 | return 0; |
| 4823 | } |
| 4824 | |
| 4825 | static void __exit stallion_module_exit(void) |
| 4826 | { |
| 4827 | struct stlbrd *brdp; |
| 4828 | struct stlpanel *panelp; |
| 4829 | struct stlport *portp; |
| 4830 | int i, j, k; |
| 4831 | |
| 4832 | pr_debug("cleanup_module()\n"); |
| 4833 | |
| 4834 | printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, |
| 4835 | stl_drvversion); |
| 4836 | |
| 4837 | /* |
| 4838 | * Free up all allocated resources used by the ports. This includes |
| 4839 | * memory and interrupts. As part of this process we will also do |
| 4840 | * a hangup on every open port - to try to flush out any processes |
| 4841 | * hanging onto ports. |
| 4842 | */ |
| 4843 | i = tty_unregister_driver(stl_serial); |
| 4844 | put_tty_driver(stl_serial); |
| 4845 | if (i) { |
| 4846 | printk("STALLION: failed to un-register tty driver, " |
| 4847 | "errno=%d\n", -i); |
| 4848 | return; |
| 4849 | } |
| 4850 | for (i = 0; i < 4; i++) |
| 4851 | class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); |
| 4852 | if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) |
| 4853 | printk("STALLION: failed to un-register serial memory device, " |
| 4854 | "errno=%d\n", -i); |
| 4855 | class_destroy(stallion_class); |
| 4856 | |
| 4857 | for (i = 0; (i < stl_nrbrds); i++) { |
| 4858 | if ((brdp = stl_brds[i]) == NULL) |
| 4859 | continue; |
| 4860 | |
| 4861 | free_irq(brdp->irq, brdp); |
| 4862 | |
| 4863 | for (j = 0; (j < STL_MAXPANELS); j++) { |
| 4864 | panelp = brdp->panels[j]; |
| 4865 | if (panelp == NULL) |
| 4866 | continue; |
| 4867 | for (k = 0; (k < STL_PORTSPERPANEL); k++) { |
| 4868 | portp = panelp->ports[k]; |
| 4869 | if (portp == NULL) |
| 4870 | continue; |
| 4871 | if (portp->tty != NULL) |
| 4872 | stl_hangup(portp->tty); |
| 4873 | kfree(portp->tx.buf); |
| 4874 | kfree(portp); |
| 4875 | } |
| 4876 | kfree(panelp); |
| 4877 | } |
| 4878 | |
| 4879 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 4880 | if (brdp->iosize2 > 0) |
| 4881 | release_region(brdp->ioaddr2, brdp->iosize2); |
| 4882 | |
| 4883 | kfree(brdp); |
| 4884 | stl_brds[i] = NULL; |
| 4885 | } |
| 4886 | } |
| 4887 | |
| 4888 | module_init(stallion_module_init); |
| 4889 | module_exit(stallion_module_exit); |
| 4890 | |
| 4891 | MODULE_AUTHOR("Greg Ungerer"); |
| 4892 | MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); |
| 4893 | MODULE_LICENSE("GPL"); |