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 | |
| 29 | #include <linux/config.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/interrupt.h> |
| 33 | #include <linux/tty.h> |
| 34 | #include <linux/tty_flip.h> |
| 35 | #include <linux/serial.h> |
| 36 | #include <linux/cd1400.h> |
| 37 | #include <linux/sc26198.h> |
| 38 | #include <linux/comstats.h> |
| 39 | #include <linux/stallion.h> |
| 40 | #include <linux/ioport.h> |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/smp_lock.h> |
| 43 | #include <linux/devfs_fs_kernel.h> |
| 44 | #include <linux/device.h> |
| 45 | #include <linux/delay.h> |
| 46 | |
| 47 | #include <asm/io.h> |
| 48 | #include <asm/uaccess.h> |
| 49 | |
| 50 | #ifdef CONFIG_PCI |
| 51 | #include <linux/pci.h> |
| 52 | #endif |
| 53 | |
| 54 | /*****************************************************************************/ |
| 55 | |
| 56 | /* |
| 57 | * Define different board types. Use the standard Stallion "assigned" |
| 58 | * board numbers. Boards supported in this driver are abbreviated as |
| 59 | * EIO = EasyIO and ECH = EasyConnection 8/32. |
| 60 | */ |
| 61 | #define BRD_EASYIO 20 |
| 62 | #define BRD_ECH 21 |
| 63 | #define BRD_ECHMC 22 |
| 64 | #define BRD_ECHPCI 26 |
| 65 | #define BRD_ECH64PCI 27 |
| 66 | #define BRD_EASYIOPCI 28 |
| 67 | |
| 68 | /* |
| 69 | * Define a configuration structure to hold the board configuration. |
| 70 | * Need to set this up in the code (for now) with the boards that are |
| 71 | * to be configured into the system. This is what needs to be modified |
| 72 | * when adding/removing/modifying boards. Each line entry in the |
| 73 | * stl_brdconf[] array is a board. Each line contains io/irq/memory |
| 74 | * ranges for that board (as well as what type of board it is). |
| 75 | * Some examples: |
| 76 | * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 }, |
| 77 | * This line would configure an EasyIO board (4 or 8, no difference), |
| 78 | * at io address 2a0 and irq 10. |
| 79 | * Another example: |
| 80 | * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 }, |
| 81 | * This line will configure an EasyConnection 8/32 board at primary io |
| 82 | * address 2a8, secondary io address 280 and irq 12. |
| 83 | * Enter as many lines into this array as you want (only the first 4 |
| 84 | * will actually be used!). Any combination of EasyIO and EasyConnection |
| 85 | * boards can be specified. EasyConnection 8/32 boards can share their |
| 86 | * secondary io addresses between each other. |
| 87 | * |
| 88 | * NOTE: there is no need to put any entries in this table for PCI |
| 89 | * boards. They will be found automatically by the driver - provided |
| 90 | * PCI BIOS32 support is compiled into the kernel. |
| 91 | */ |
| 92 | |
| 93 | typedef struct { |
| 94 | int brdtype; |
| 95 | int ioaddr1; |
| 96 | int ioaddr2; |
| 97 | unsigned long memaddr; |
| 98 | int irq; |
| 99 | int irqtype; |
| 100 | } stlconf_t; |
| 101 | |
| 102 | static stlconf_t stl_brdconf[] = { |
| 103 | /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/ |
| 104 | }; |
| 105 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 106 | static int stl_nrbrds = ARRAY_SIZE(stl_brdconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | /*****************************************************************************/ |
| 109 | |
| 110 | /* |
| 111 | * Define some important driver characteristics. Device major numbers |
| 112 | * allocated as per Linux Device Registry. |
| 113 | */ |
| 114 | #ifndef STL_SIOMEMMAJOR |
| 115 | #define STL_SIOMEMMAJOR 28 |
| 116 | #endif |
| 117 | #ifndef STL_SERIALMAJOR |
| 118 | #define STL_SERIALMAJOR 24 |
| 119 | #endif |
| 120 | #ifndef STL_CALLOUTMAJOR |
| 121 | #define STL_CALLOUTMAJOR 25 |
| 122 | #endif |
| 123 | |
| 124 | /* |
| 125 | * Set the TX buffer size. Bigger is better, but we don't want |
| 126 | * to chew too much memory with buffers! |
| 127 | */ |
| 128 | #define STL_TXBUFLOW 512 |
| 129 | #define STL_TXBUFSIZE 4096 |
| 130 | |
| 131 | /*****************************************************************************/ |
| 132 | |
| 133 | /* |
| 134 | * Define our local driver identity first. Set up stuff to deal with |
| 135 | * all the local structures required by a serial tty driver. |
| 136 | */ |
| 137 | static char *stl_drvtitle = "Stallion Multiport Serial Driver"; |
| 138 | static char *stl_drvname = "stallion"; |
| 139 | static char *stl_drvversion = "5.6.0"; |
| 140 | |
| 141 | static struct tty_driver *stl_serial; |
| 142 | |
| 143 | /* |
| 144 | * We will need to allocate a temporary write buffer for chars that |
| 145 | * come direct from user space. The problem is that a copy from user |
| 146 | * space might cause a page fault (typically on a system that is |
| 147 | * swapping!). All ports will share one buffer - since if the system |
| 148 | * is already swapping a shared buffer won't make things any worse. |
| 149 | */ |
| 150 | static char *stl_tmpwritebuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
| 152 | /* |
| 153 | * Define a local default termios struct. All ports will be created |
| 154 | * with this termios initially. Basically all it defines is a raw port |
| 155 | * at 9600, 8 data bits, 1 stop bit. |
| 156 | */ |
| 157 | static struct termios stl_deftermios = { |
| 158 | .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), |
| 159 | .c_cc = INIT_C_CC, |
| 160 | }; |
| 161 | |
| 162 | /* |
| 163 | * Define global stats structures. Not used often, and can be |
| 164 | * re-used for each stats call. |
| 165 | */ |
| 166 | static comstats_t stl_comstats; |
| 167 | static combrd_t stl_brdstats; |
| 168 | static stlbrd_t stl_dummybrd; |
| 169 | static stlport_t stl_dummyport; |
| 170 | |
| 171 | /* |
| 172 | * Define global place to put buffer overflow characters. |
| 173 | */ |
| 174 | static char stl_unwanted[SC26198_RXFIFOSIZE]; |
| 175 | |
| 176 | /*****************************************************************************/ |
| 177 | |
| 178 | static stlbrd_t *stl_brds[STL_MAXBRDS]; |
| 179 | |
| 180 | /* |
| 181 | * Per board state flags. Used with the state field of the board struct. |
| 182 | * Not really much here! |
| 183 | */ |
| 184 | #define BRD_FOUND 0x1 |
| 185 | |
| 186 | /* |
| 187 | * Define the port structure istate flags. These set of flags are |
| 188 | * modified at interrupt time - so setting and reseting them needs |
| 189 | * to be atomic. Use the bit clear/setting routines for this. |
| 190 | */ |
| 191 | #define ASYI_TXBUSY 1 |
| 192 | #define ASYI_TXLOW 2 |
| 193 | #define ASYI_DCDCHANGE 3 |
| 194 | #define ASYI_TXFLOWED 4 |
| 195 | |
| 196 | /* |
| 197 | * Define an array of board names as printable strings. Handy for |
| 198 | * referencing boards when printing trace and stuff. |
| 199 | */ |
| 200 | static char *stl_brdnames[] = { |
| 201 | (char *) NULL, |
| 202 | (char *) NULL, |
| 203 | (char *) NULL, |
| 204 | (char *) NULL, |
| 205 | (char *) NULL, |
| 206 | (char *) NULL, |
| 207 | (char *) NULL, |
| 208 | (char *) NULL, |
| 209 | (char *) NULL, |
| 210 | (char *) NULL, |
| 211 | (char *) NULL, |
| 212 | (char *) NULL, |
| 213 | (char *) NULL, |
| 214 | (char *) NULL, |
| 215 | (char *) NULL, |
| 216 | (char *) NULL, |
| 217 | (char *) NULL, |
| 218 | (char *) NULL, |
| 219 | (char *) NULL, |
| 220 | (char *) NULL, |
| 221 | "EasyIO", |
| 222 | "EC8/32-AT", |
| 223 | "EC8/32-MC", |
| 224 | (char *) NULL, |
| 225 | (char *) NULL, |
| 226 | (char *) NULL, |
| 227 | "EC8/32-PCI", |
| 228 | "EC8/64-PCI", |
| 229 | "EasyIO-PCI", |
| 230 | }; |
| 231 | |
| 232 | /*****************************************************************************/ |
| 233 | |
| 234 | /* |
| 235 | * Define some string labels for arguments passed from the module |
| 236 | * load line. These allow for easy board definitions, and easy |
| 237 | * modification of the io, memory and irq resoucres. |
| 238 | */ |
| 239 | static int stl_nargs = 0; |
| 240 | static char *board0[4]; |
| 241 | static char *board1[4]; |
| 242 | static char *board2[4]; |
| 243 | static char *board3[4]; |
| 244 | |
| 245 | static char **stl_brdsp[] = { |
| 246 | (char **) &board0, |
| 247 | (char **) &board1, |
| 248 | (char **) &board2, |
| 249 | (char **) &board3 |
| 250 | }; |
| 251 | |
| 252 | /* |
| 253 | * Define a set of common board names, and types. This is used to |
| 254 | * parse any module arguments. |
| 255 | */ |
| 256 | |
| 257 | typedef struct stlbrdtype { |
| 258 | char *name; |
| 259 | int type; |
| 260 | } stlbrdtype_t; |
| 261 | |
| 262 | static stlbrdtype_t stl_brdstr[] = { |
| 263 | { "easyio", BRD_EASYIO }, |
| 264 | { "eio", BRD_EASYIO }, |
| 265 | { "20", BRD_EASYIO }, |
| 266 | { "ec8/32", BRD_ECH }, |
| 267 | { "ec8/32-at", BRD_ECH }, |
| 268 | { "ec8/32-isa", BRD_ECH }, |
| 269 | { "ech", BRD_ECH }, |
| 270 | { "echat", BRD_ECH }, |
| 271 | { "21", BRD_ECH }, |
| 272 | { "ec8/32-mc", BRD_ECHMC }, |
| 273 | { "ec8/32-mca", BRD_ECHMC }, |
| 274 | { "echmc", BRD_ECHMC }, |
| 275 | { "echmca", BRD_ECHMC }, |
| 276 | { "22", BRD_ECHMC }, |
| 277 | { "ec8/32-pc", BRD_ECHPCI }, |
| 278 | { "ec8/32-pci", BRD_ECHPCI }, |
| 279 | { "26", BRD_ECHPCI }, |
| 280 | { "ec8/64-pc", BRD_ECH64PCI }, |
| 281 | { "ec8/64-pci", BRD_ECH64PCI }, |
| 282 | { "ech-pci", BRD_ECH64PCI }, |
| 283 | { "echpci", BRD_ECH64PCI }, |
| 284 | { "echpc", BRD_ECH64PCI }, |
| 285 | { "27", BRD_ECH64PCI }, |
| 286 | { "easyio-pc", BRD_EASYIOPCI }, |
| 287 | { "easyio-pci", BRD_EASYIOPCI }, |
| 288 | { "eio-pci", BRD_EASYIOPCI }, |
| 289 | { "eiopci", BRD_EASYIOPCI }, |
| 290 | { "28", BRD_EASYIOPCI }, |
| 291 | }; |
| 292 | |
| 293 | /* |
| 294 | * Define the module agruments. |
| 295 | */ |
| 296 | MODULE_AUTHOR("Greg Ungerer"); |
| 297 | MODULE_DESCRIPTION("Stallion Multiport Serial Driver"); |
| 298 | MODULE_LICENSE("GPL"); |
| 299 | |
| 300 | module_param_array(board0, charp, &stl_nargs, 0); |
| 301 | MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 302 | module_param_array(board1, charp, &stl_nargs, 0); |
| 303 | MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 304 | module_param_array(board2, charp, &stl_nargs, 0); |
| 305 | MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 306 | module_param_array(board3, charp, &stl_nargs, 0); |
| 307 | MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]"); |
| 308 | |
| 309 | /*****************************************************************************/ |
| 310 | |
| 311 | /* |
| 312 | * Hardware ID bits for the EasyIO and ECH boards. These defines apply |
| 313 | * to the directly accessible io ports of these boards (not the uarts - |
| 314 | * they are in cd1400.h and sc26198.h). |
| 315 | */ |
| 316 | #define EIO_8PORTRS 0x04 |
| 317 | #define EIO_4PORTRS 0x05 |
| 318 | #define EIO_8PORTDI 0x00 |
| 319 | #define EIO_8PORTM 0x06 |
| 320 | #define EIO_MK3 0x03 |
| 321 | #define EIO_IDBITMASK 0x07 |
| 322 | |
| 323 | #define EIO_BRDMASK 0xf0 |
| 324 | #define ID_BRD4 0x10 |
| 325 | #define ID_BRD8 0x20 |
| 326 | #define ID_BRD16 0x30 |
| 327 | |
| 328 | #define EIO_INTRPEND 0x08 |
| 329 | #define EIO_INTEDGE 0x00 |
| 330 | #define EIO_INTLEVEL 0x08 |
| 331 | #define EIO_0WS 0x10 |
| 332 | |
| 333 | #define ECH_ID 0xa0 |
| 334 | #define ECH_IDBITMASK 0xe0 |
| 335 | #define ECH_BRDENABLE 0x08 |
| 336 | #define ECH_BRDDISABLE 0x00 |
| 337 | #define ECH_INTENABLE 0x01 |
| 338 | #define ECH_INTDISABLE 0x00 |
| 339 | #define ECH_INTLEVEL 0x02 |
| 340 | #define ECH_INTEDGE 0x00 |
| 341 | #define ECH_INTRPEND 0x01 |
| 342 | #define ECH_BRDRESET 0x01 |
| 343 | |
| 344 | #define ECHMC_INTENABLE 0x01 |
| 345 | #define ECHMC_BRDRESET 0x02 |
| 346 | |
| 347 | #define ECH_PNLSTATUS 2 |
| 348 | #define ECH_PNL16PORT 0x20 |
| 349 | #define ECH_PNLIDMASK 0x07 |
| 350 | #define ECH_PNLXPID 0x40 |
| 351 | #define ECH_PNLINTRPEND 0x80 |
| 352 | |
| 353 | #define ECH_ADDR2MASK 0x1e0 |
| 354 | |
| 355 | /* |
| 356 | * Define the vector mapping bits for the programmable interrupt board |
| 357 | * hardware. These bits encode the interrupt for the board to use - it |
| 358 | * is software selectable (except the EIO-8M). |
| 359 | */ |
| 360 | static unsigned char stl_vecmap[] = { |
| 361 | 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07, |
| 362 | 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03 |
| 363 | }; |
| 364 | |
| 365 | /* |
| 366 | * Set up enable and disable macros for the ECH boards. They require |
| 367 | * the secondary io address space to be activated and deactivated. |
| 368 | * This way all ECH boards can share their secondary io region. |
| 369 | * If this is an ECH-PCI board then also need to set the page pointer |
| 370 | * to point to the correct page. |
| 371 | */ |
| 372 | #define BRDENABLE(brdnr,pagenr) \ |
| 373 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ |
| 374 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \ |
| 375 | stl_brds[(brdnr)]->ioctrl); \ |
| 376 | else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \ |
| 377 | outb((pagenr), stl_brds[(brdnr)]->ioctrl); |
| 378 | |
| 379 | #define BRDDISABLE(brdnr) \ |
| 380 | if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \ |
| 381 | outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \ |
| 382 | stl_brds[(brdnr)]->ioctrl); |
| 383 | |
| 384 | #define STL_CD1400MAXBAUD 230400 |
| 385 | #define STL_SC26198MAXBAUD 460800 |
| 386 | |
| 387 | #define STL_BAUDBASE 115200 |
| 388 | #define STL_CLOSEDELAY (5 * HZ / 10) |
| 389 | |
| 390 | /*****************************************************************************/ |
| 391 | |
| 392 | #ifdef CONFIG_PCI |
| 393 | |
| 394 | /* |
| 395 | * Define the Stallion PCI vendor and device IDs. |
| 396 | */ |
| 397 | #ifndef PCI_VENDOR_ID_STALLION |
| 398 | #define PCI_VENDOR_ID_STALLION 0x124d |
| 399 | #endif |
| 400 | #ifndef PCI_DEVICE_ID_ECHPCI832 |
| 401 | #define PCI_DEVICE_ID_ECHPCI832 0x0000 |
| 402 | #endif |
| 403 | #ifndef PCI_DEVICE_ID_ECHPCI864 |
| 404 | #define PCI_DEVICE_ID_ECHPCI864 0x0002 |
| 405 | #endif |
| 406 | #ifndef PCI_DEVICE_ID_EIOPCI |
| 407 | #define PCI_DEVICE_ID_EIOPCI 0x0003 |
| 408 | #endif |
| 409 | |
| 410 | /* |
| 411 | * Define structure to hold all Stallion PCI boards. |
| 412 | */ |
| 413 | typedef struct stlpcibrd { |
| 414 | unsigned short vendid; |
| 415 | unsigned short devid; |
| 416 | int brdtype; |
| 417 | } stlpcibrd_t; |
| 418 | |
| 419 | static stlpcibrd_t stl_pcibrds[] = { |
| 420 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864, BRD_ECH64PCI }, |
| 421 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI, BRD_EASYIOPCI }, |
| 422 | { PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832, BRD_ECHPCI }, |
| 423 | { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410, BRD_ECHPCI }, |
| 424 | }; |
| 425 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 426 | static int stl_nrpcibrds = ARRAY_SIZE(stl_pcibrds); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
| 428 | #endif |
| 429 | |
| 430 | /*****************************************************************************/ |
| 431 | |
| 432 | /* |
| 433 | * Define macros to extract a brd/port number from a minor number. |
| 434 | */ |
| 435 | #define MINOR2BRD(min) (((min) & 0xc0) >> 6) |
| 436 | #define MINOR2PORT(min) ((min) & 0x3f) |
| 437 | |
| 438 | /* |
| 439 | * Define a baud rate table that converts termios baud rate selector |
| 440 | * into the actual baud rate value. All baud rate calculations are |
| 441 | * based on the actual baud rate required. |
| 442 | */ |
| 443 | static unsigned int stl_baudrates[] = { |
| 444 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, |
| 445 | 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 |
| 446 | }; |
| 447 | |
| 448 | /* |
| 449 | * Define some handy local macros... |
| 450 | */ |
| 451 | #undef MIN |
| 452 | #define MIN(a,b) (((a) <= (b)) ? (a) : (b)) |
| 453 | |
| 454 | #undef TOLOWER |
| 455 | #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x)) |
| 456 | |
| 457 | /*****************************************************************************/ |
| 458 | |
| 459 | /* |
| 460 | * Declare all those functions in this driver! |
| 461 | */ |
| 462 | |
| 463 | static void stl_argbrds(void); |
| 464 | static int stl_parsebrd(stlconf_t *confp, char **argp); |
| 465 | |
| 466 | static unsigned long stl_atol(char *str); |
| 467 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 468 | static int stl_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | static int stl_open(struct tty_struct *tty, struct file *filp); |
| 470 | static void stl_close(struct tty_struct *tty, struct file *filp); |
| 471 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count); |
| 472 | static void stl_putchar(struct tty_struct *tty, unsigned char ch); |
| 473 | static void stl_flushchars(struct tty_struct *tty); |
| 474 | static int stl_writeroom(struct tty_struct *tty); |
| 475 | static int stl_charsinbuffer(struct tty_struct *tty); |
| 476 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); |
| 477 | static void stl_settermios(struct tty_struct *tty, struct termios *old); |
| 478 | static void stl_throttle(struct tty_struct *tty); |
| 479 | static void stl_unthrottle(struct tty_struct *tty); |
| 480 | static void stl_stop(struct tty_struct *tty); |
| 481 | static void stl_start(struct tty_struct *tty); |
| 482 | static void stl_flushbuffer(struct tty_struct *tty); |
| 483 | static void stl_breakctl(struct tty_struct *tty, int state); |
| 484 | static void stl_waituntilsent(struct tty_struct *tty, int timeout); |
| 485 | static void stl_sendxchar(struct tty_struct *tty, char ch); |
| 486 | static void stl_hangup(struct tty_struct *tty); |
| 487 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg); |
| 488 | static int stl_portinfo(stlport_t *portp, int portnr, char *pos); |
| 489 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data); |
| 490 | |
| 491 | static int stl_brdinit(stlbrd_t *brdp); |
| 492 | static int stl_initports(stlbrd_t *brdp, stlpanel_t *panelp); |
| 493 | static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp); |
| 494 | static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp); |
| 495 | static int stl_getbrdstats(combrd_t __user *bp); |
| 496 | static int stl_getportstats(stlport_t *portp, comstats_t __user *cp); |
| 497 | static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp); |
| 498 | static int stl_getportstruct(stlport_t __user *arg); |
| 499 | static int stl_getbrdstruct(stlbrd_t __user *arg); |
| 500 | static int stl_waitcarrier(stlport_t *portp, struct file *filp); |
| 501 | static int stl_eiointr(stlbrd_t *brdp); |
| 502 | static int stl_echatintr(stlbrd_t *brdp); |
| 503 | static int stl_echmcaintr(stlbrd_t *brdp); |
| 504 | static int stl_echpciintr(stlbrd_t *brdp); |
| 505 | static int stl_echpci64intr(stlbrd_t *brdp); |
| 506 | static void stl_offintr(void *private); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | static stlbrd_t *stl_allocbrd(void); |
| 508 | static stlport_t *stl_getport(int brdnr, int panelnr, int portnr); |
| 509 | |
| 510 | static inline int stl_initbrds(void); |
| 511 | static inline int stl_initeio(stlbrd_t *brdp); |
| 512 | static inline int stl_initech(stlbrd_t *brdp); |
| 513 | static inline int stl_getbrdnr(void); |
| 514 | |
| 515 | #ifdef CONFIG_PCI |
| 516 | static inline int stl_findpcibrds(void); |
| 517 | static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp); |
| 518 | #endif |
| 519 | |
| 520 | /* |
| 521 | * CD1400 uart specific handling functions. |
| 522 | */ |
| 523 | static void stl_cd1400setreg(stlport_t *portp, int regnr, int value); |
| 524 | static int stl_cd1400getreg(stlport_t *portp, int regnr); |
| 525 | static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value); |
| 526 | static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp); |
| 527 | static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); |
| 528 | static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp); |
| 529 | static int stl_cd1400getsignals(stlport_t *portp); |
| 530 | static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts); |
| 531 | static void stl_cd1400ccrwait(stlport_t *portp); |
| 532 | static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx); |
| 533 | static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx); |
| 534 | static void stl_cd1400disableintrs(stlport_t *portp); |
| 535 | static void stl_cd1400sendbreak(stlport_t *portp, int len); |
| 536 | static void stl_cd1400flowctrl(stlport_t *portp, int state); |
| 537 | static void stl_cd1400sendflow(stlport_t *portp, int state); |
| 538 | static void stl_cd1400flush(stlport_t *portp); |
| 539 | static int stl_cd1400datastate(stlport_t *portp); |
| 540 | static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase); |
| 541 | static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase); |
| 542 | static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr); |
| 543 | static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr); |
| 544 | static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr); |
| 545 | |
| 546 | static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr); |
| 547 | |
| 548 | /* |
| 549 | * SC26198 uart specific handling functions. |
| 550 | */ |
| 551 | static void stl_sc26198setreg(stlport_t *portp, int regnr, int value); |
| 552 | static int stl_sc26198getreg(stlport_t *portp, int regnr); |
| 553 | static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value); |
| 554 | static int stl_sc26198getglobreg(stlport_t *portp, int regnr); |
| 555 | static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp); |
| 556 | static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); |
| 557 | static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp); |
| 558 | static int stl_sc26198getsignals(stlport_t *portp); |
| 559 | static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts); |
| 560 | static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx); |
| 561 | static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx); |
| 562 | static void stl_sc26198disableintrs(stlport_t *portp); |
| 563 | static void stl_sc26198sendbreak(stlport_t *portp, int len); |
| 564 | static void stl_sc26198flowctrl(stlport_t *portp, int state); |
| 565 | static void stl_sc26198sendflow(stlport_t *portp, int state); |
| 566 | static void stl_sc26198flush(stlport_t *portp); |
| 567 | static int stl_sc26198datastate(stlport_t *portp); |
| 568 | static void stl_sc26198wait(stlport_t *portp); |
| 569 | static void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty); |
| 570 | static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase); |
| 571 | static void stl_sc26198txisr(stlport_t *port); |
| 572 | static void stl_sc26198rxisr(stlport_t *port, unsigned int iack); |
| 573 | static void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch); |
| 574 | static void stl_sc26198rxbadchars(stlport_t *portp); |
| 575 | static void stl_sc26198otherisr(stlport_t *port, unsigned int iack); |
| 576 | |
| 577 | /*****************************************************************************/ |
| 578 | |
| 579 | /* |
| 580 | * Generic UART support structure. |
| 581 | */ |
| 582 | typedef struct uart { |
| 583 | int (*panelinit)(stlbrd_t *brdp, stlpanel_t *panelp); |
| 584 | void (*portinit)(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp); |
| 585 | void (*setport)(stlport_t *portp, struct termios *tiosp); |
| 586 | int (*getsignals)(stlport_t *portp); |
| 587 | void (*setsignals)(stlport_t *portp, int dtr, int rts); |
| 588 | void (*enablerxtx)(stlport_t *portp, int rx, int tx); |
| 589 | void (*startrxtx)(stlport_t *portp, int rx, int tx); |
| 590 | void (*disableintrs)(stlport_t *portp); |
| 591 | void (*sendbreak)(stlport_t *portp, int len); |
| 592 | void (*flowctrl)(stlport_t *portp, int state); |
| 593 | void (*sendflow)(stlport_t *portp, int state); |
| 594 | void (*flush)(stlport_t *portp); |
| 595 | int (*datastate)(stlport_t *portp); |
| 596 | void (*intr)(stlpanel_t *panelp, unsigned int iobase); |
| 597 | } uart_t; |
| 598 | |
| 599 | /* |
| 600 | * Define some macros to make calling these functions nice and clean. |
| 601 | */ |
| 602 | #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit) |
| 603 | #define stl_portinit (* ((uart_t *) portp->uartp)->portinit) |
| 604 | #define stl_setport (* ((uart_t *) portp->uartp)->setport) |
| 605 | #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals) |
| 606 | #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals) |
| 607 | #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx) |
| 608 | #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx) |
| 609 | #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs) |
| 610 | #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak) |
| 611 | #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl) |
| 612 | #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow) |
| 613 | #define stl_flush (* ((uart_t *) portp->uartp)->flush) |
| 614 | #define stl_datastate (* ((uart_t *) portp->uartp)->datastate) |
| 615 | |
| 616 | /*****************************************************************************/ |
| 617 | |
| 618 | /* |
| 619 | * CD1400 UART specific data initialization. |
| 620 | */ |
| 621 | static uart_t stl_cd1400uart = { |
| 622 | stl_cd1400panelinit, |
| 623 | stl_cd1400portinit, |
| 624 | stl_cd1400setport, |
| 625 | stl_cd1400getsignals, |
| 626 | stl_cd1400setsignals, |
| 627 | stl_cd1400enablerxtx, |
| 628 | stl_cd1400startrxtx, |
| 629 | stl_cd1400disableintrs, |
| 630 | stl_cd1400sendbreak, |
| 631 | stl_cd1400flowctrl, |
| 632 | stl_cd1400sendflow, |
| 633 | stl_cd1400flush, |
| 634 | stl_cd1400datastate, |
| 635 | stl_cd1400eiointr |
| 636 | }; |
| 637 | |
| 638 | /* |
| 639 | * Define the offsets within the register bank of a cd1400 based panel. |
| 640 | * These io address offsets are common to the EasyIO board as well. |
| 641 | */ |
| 642 | #define EREG_ADDR 0 |
| 643 | #define EREG_DATA 4 |
| 644 | #define EREG_RXACK 5 |
| 645 | #define EREG_TXACK 6 |
| 646 | #define EREG_MDACK 7 |
| 647 | |
| 648 | #define EREG_BANKSIZE 8 |
| 649 | |
| 650 | #define CD1400_CLK 25000000 |
| 651 | #define CD1400_CLK8M 20000000 |
| 652 | |
| 653 | /* |
| 654 | * Define the cd1400 baud rate clocks. These are used when calculating |
| 655 | * what clock and divisor to use for the required baud rate. Also |
| 656 | * define the maximum baud rate allowed, and the default base baud. |
| 657 | */ |
| 658 | static int stl_cd1400clkdivs[] = { |
| 659 | CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4 |
| 660 | }; |
| 661 | |
| 662 | /*****************************************************************************/ |
| 663 | |
| 664 | /* |
| 665 | * SC26198 UART specific data initization. |
| 666 | */ |
| 667 | static uart_t stl_sc26198uart = { |
| 668 | stl_sc26198panelinit, |
| 669 | stl_sc26198portinit, |
| 670 | stl_sc26198setport, |
| 671 | stl_sc26198getsignals, |
| 672 | stl_sc26198setsignals, |
| 673 | stl_sc26198enablerxtx, |
| 674 | stl_sc26198startrxtx, |
| 675 | stl_sc26198disableintrs, |
| 676 | stl_sc26198sendbreak, |
| 677 | stl_sc26198flowctrl, |
| 678 | stl_sc26198sendflow, |
| 679 | stl_sc26198flush, |
| 680 | stl_sc26198datastate, |
| 681 | stl_sc26198intr |
| 682 | }; |
| 683 | |
| 684 | /* |
| 685 | * Define the offsets within the register bank of a sc26198 based panel. |
| 686 | */ |
| 687 | #define XP_DATA 0 |
| 688 | #define XP_ADDR 1 |
| 689 | #define XP_MODID 2 |
| 690 | #define XP_STATUS 2 |
| 691 | #define XP_IACK 3 |
| 692 | |
| 693 | #define XP_BANKSIZE 4 |
| 694 | |
| 695 | /* |
| 696 | * Define the sc26198 baud rate table. Offsets within the table |
| 697 | * represent the actual baud rate selector of sc26198 registers. |
| 698 | */ |
| 699 | static unsigned int sc26198_baudtable[] = { |
| 700 | 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600, |
| 701 | 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200, |
| 702 | 230400, 460800, 921600 |
| 703 | }; |
| 704 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 705 | #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
| 707 | /*****************************************************************************/ |
| 708 | |
| 709 | /* |
| 710 | * Define the driver info for a user level control device. Used mainly |
| 711 | * to get at port stats - only not using the port device itself. |
| 712 | */ |
| 713 | static struct file_operations stl_fsiomem = { |
| 714 | .owner = THIS_MODULE, |
| 715 | .ioctl = stl_memioctl, |
| 716 | }; |
| 717 | |
| 718 | /*****************************************************************************/ |
| 719 | |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 720 | static struct class *stallion_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | |
| 722 | /* |
| 723 | * Loadable module initialization stuff. |
| 724 | */ |
| 725 | |
| 726 | static int __init stallion_module_init(void) |
| 727 | { |
| 728 | unsigned long flags; |
| 729 | |
| 730 | #ifdef DEBUG |
| 731 | printk("init_module()\n"); |
| 732 | #endif |
| 733 | |
| 734 | save_flags(flags); |
| 735 | cli(); |
| 736 | stl_init(); |
| 737 | restore_flags(flags); |
| 738 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 739 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | /*****************************************************************************/ |
| 743 | |
| 744 | static void __exit stallion_module_exit(void) |
| 745 | { |
| 746 | stlbrd_t *brdp; |
| 747 | stlpanel_t *panelp; |
| 748 | stlport_t *portp; |
| 749 | unsigned long flags; |
| 750 | int i, j, k; |
| 751 | |
| 752 | #ifdef DEBUG |
| 753 | printk("cleanup_module()\n"); |
| 754 | #endif |
| 755 | |
| 756 | printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle, |
| 757 | stl_drvversion); |
| 758 | |
| 759 | save_flags(flags); |
| 760 | cli(); |
| 761 | |
| 762 | /* |
| 763 | * Free up all allocated resources used by the ports. This includes |
| 764 | * memory and interrupts. As part of this process we will also do |
| 765 | * a hangup on every open port - to try to flush out any processes |
| 766 | * hanging onto ports. |
| 767 | */ |
| 768 | i = tty_unregister_driver(stl_serial); |
| 769 | put_tty_driver(stl_serial); |
| 770 | if (i) { |
| 771 | printk("STALLION: failed to un-register tty driver, " |
| 772 | "errno=%d\n", -i); |
| 773 | restore_flags(flags); |
| 774 | return; |
| 775 | } |
| 776 | for (i = 0; i < 4; i++) { |
| 777 | devfs_remove("staliomem/%d", i); |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 778 | class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | } |
| 780 | devfs_remove("staliomem"); |
| 781 | if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem"))) |
| 782 | printk("STALLION: failed to un-register serial memory device, " |
| 783 | "errno=%d\n", -i); |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 784 | class_destroy(stallion_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
Jesper Juhl | 735d566 | 2005-11-07 01:01:29 -0800 | [diff] [blame] | 786 | kfree(stl_tmpwritebuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | |
| 788 | for (i = 0; (i < stl_nrbrds); i++) { |
| 789 | if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL) |
| 790 | continue; |
| 791 | |
| 792 | free_irq(brdp->irq, brdp); |
| 793 | |
| 794 | for (j = 0; (j < STL_MAXPANELS); j++) { |
| 795 | panelp = brdp->panels[j]; |
| 796 | if (panelp == (stlpanel_t *) NULL) |
| 797 | continue; |
| 798 | for (k = 0; (k < STL_PORTSPERPANEL); k++) { |
| 799 | portp = panelp->ports[k]; |
| 800 | if (portp == (stlport_t *) NULL) |
| 801 | continue; |
| 802 | if (portp->tty != (struct tty_struct *) NULL) |
| 803 | stl_hangup(portp->tty); |
Jesper Juhl | 735d566 | 2005-11-07 01:01:29 -0800 | [diff] [blame] | 804 | kfree(portp->tx.buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | kfree(portp); |
| 806 | } |
| 807 | kfree(panelp); |
| 808 | } |
| 809 | |
| 810 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 811 | if (brdp->iosize2 > 0) |
| 812 | release_region(brdp->ioaddr2, brdp->iosize2); |
| 813 | |
| 814 | kfree(brdp); |
| 815 | stl_brds[i] = (stlbrd_t *) NULL; |
| 816 | } |
| 817 | |
| 818 | restore_flags(flags); |
| 819 | } |
| 820 | |
| 821 | module_init(stallion_module_init); |
| 822 | module_exit(stallion_module_exit); |
| 823 | |
| 824 | /*****************************************************************************/ |
| 825 | |
| 826 | /* |
| 827 | * Check for any arguments passed in on the module load command line. |
| 828 | */ |
| 829 | |
| 830 | static void stl_argbrds(void) |
| 831 | { |
| 832 | stlconf_t conf; |
| 833 | stlbrd_t *brdp; |
| 834 | int i; |
| 835 | |
| 836 | #ifdef DEBUG |
| 837 | printk("stl_argbrds()\n"); |
| 838 | #endif |
| 839 | |
| 840 | for (i = stl_nrbrds; (i < stl_nargs); i++) { |
| 841 | memset(&conf, 0, sizeof(conf)); |
| 842 | if (stl_parsebrd(&conf, stl_brdsp[i]) == 0) |
| 843 | continue; |
| 844 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) |
| 845 | continue; |
| 846 | stl_nrbrds = i + 1; |
| 847 | brdp->brdnr = i; |
| 848 | brdp->brdtype = conf.brdtype; |
| 849 | brdp->ioaddr1 = conf.ioaddr1; |
| 850 | brdp->ioaddr2 = conf.ioaddr2; |
| 851 | brdp->irq = conf.irq; |
| 852 | brdp->irqtype = conf.irqtype; |
| 853 | stl_brdinit(brdp); |
| 854 | } |
| 855 | } |
| 856 | |
| 857 | /*****************************************************************************/ |
| 858 | |
| 859 | /* |
| 860 | * Convert an ascii string number into an unsigned long. |
| 861 | */ |
| 862 | |
| 863 | static unsigned long stl_atol(char *str) |
| 864 | { |
| 865 | unsigned long val; |
| 866 | int base, c; |
| 867 | char *sp; |
| 868 | |
| 869 | val = 0; |
| 870 | sp = str; |
| 871 | if ((*sp == '0') && (*(sp+1) == 'x')) { |
| 872 | base = 16; |
| 873 | sp += 2; |
| 874 | } else if (*sp == '0') { |
| 875 | base = 8; |
| 876 | sp++; |
| 877 | } else { |
| 878 | base = 10; |
| 879 | } |
| 880 | |
| 881 | for (; (*sp != 0); sp++) { |
| 882 | c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0'); |
| 883 | if ((c < 0) || (c >= base)) { |
| 884 | printk("STALLION: invalid argument %s\n", str); |
| 885 | val = 0; |
| 886 | break; |
| 887 | } |
| 888 | val = (val * base) + c; |
| 889 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 890 | return val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | /*****************************************************************************/ |
| 894 | |
| 895 | /* |
| 896 | * Parse the supplied argument string, into the board conf struct. |
| 897 | */ |
| 898 | |
| 899 | static int stl_parsebrd(stlconf_t *confp, char **argp) |
| 900 | { |
| 901 | char *sp; |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 902 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
| 904 | #ifdef DEBUG |
| 905 | printk("stl_parsebrd(confp=%x,argp=%x)\n", (int) confp, (int) argp); |
| 906 | #endif |
| 907 | |
| 908 | if ((argp[0] == (char *) NULL) || (*argp[0] == 0)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 909 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | |
| 911 | for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++) |
| 912 | *sp = TOLOWER(*sp); |
| 913 | |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 914 | for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | if (strcmp(stl_brdstr[i].name, argp[0]) == 0) |
| 916 | break; |
| 917 | } |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 918 | if (i == ARRAY_SIZE(stl_brdstr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | printk("STALLION: unknown board name, %s?\n", argp[0]); |
Tobias Klauser | fe97107 | 2006-01-09 20:54:02 -0800 | [diff] [blame] | 920 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | } |
| 922 | |
| 923 | confp->brdtype = stl_brdstr[i].type; |
| 924 | |
| 925 | i = 1; |
| 926 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) |
| 927 | confp->ioaddr1 = stl_atol(argp[i]); |
| 928 | i++; |
| 929 | if (confp->brdtype == BRD_ECH) { |
| 930 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) |
| 931 | confp->ioaddr2 = stl_atol(argp[i]); |
| 932 | i++; |
| 933 | } |
| 934 | if ((argp[i] != (char *) NULL) && (*argp[i] != 0)) |
| 935 | confp->irq = stl_atol(argp[i]); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 936 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | /*****************************************************************************/ |
| 940 | |
| 941 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | * Allocate a new board structure. Fill out the basic info in it. |
| 943 | */ |
| 944 | |
| 945 | static stlbrd_t *stl_allocbrd(void) |
| 946 | { |
| 947 | stlbrd_t *brdp; |
| 948 | |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame^] | 949 | brdp = kzalloc(sizeof(stlbrd_t), GFP_KERNEL); |
| 950 | if (!brdp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | printk("STALLION: failed to allocate memory (size=%d)\n", |
| 952 | sizeof(stlbrd_t)); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame^] | 953 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | } |
| 955 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | brdp->magic = STL_BOARDMAGIC; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 957 | return brdp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | } |
| 959 | |
| 960 | /*****************************************************************************/ |
| 961 | |
| 962 | static int stl_open(struct tty_struct *tty, struct file *filp) |
| 963 | { |
| 964 | stlport_t *portp; |
| 965 | stlbrd_t *brdp; |
| 966 | unsigned int minordev; |
| 967 | int brdnr, panelnr, portnr, rc; |
| 968 | |
| 969 | #ifdef DEBUG |
| 970 | printk("stl_open(tty=%x,filp=%x): device=%s\n", (int) tty, |
| 971 | (int) filp, tty->name); |
| 972 | #endif |
| 973 | |
| 974 | minordev = tty->index; |
| 975 | brdnr = MINOR2BRD(minordev); |
| 976 | if (brdnr >= stl_nrbrds) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 977 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | brdp = stl_brds[brdnr]; |
| 979 | if (brdp == (stlbrd_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 980 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | minordev = MINOR2PORT(minordev); |
| 982 | for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) { |
| 983 | if (brdp->panels[panelnr] == (stlpanel_t *) NULL) |
| 984 | break; |
| 985 | if (minordev < brdp->panels[panelnr]->nrports) { |
| 986 | portnr = minordev; |
| 987 | break; |
| 988 | } |
| 989 | minordev -= brdp->panels[panelnr]->nrports; |
| 990 | } |
| 991 | if (portnr < 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 992 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | |
| 994 | portp = brdp->panels[panelnr]->ports[portnr]; |
| 995 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 996 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
| 998 | /* |
| 999 | * On the first open of the device setup the port hardware, and |
| 1000 | * initialize the per port data structure. |
| 1001 | */ |
| 1002 | portp->tty = tty; |
| 1003 | tty->driver_data = portp; |
| 1004 | portp->refcount++; |
| 1005 | |
| 1006 | if ((portp->flags & ASYNC_INITIALIZED) == 0) { |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame^] | 1007 | if (!portp->tx.buf) { |
| 1008 | portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); |
| 1009 | if (!portp->tx.buf) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1010 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | portp->tx.head = portp->tx.buf; |
| 1012 | portp->tx.tail = portp->tx.buf; |
| 1013 | } |
| 1014 | stl_setport(portp, tty->termios); |
| 1015 | portp->sigs = stl_getsignals(portp); |
| 1016 | stl_setsignals(portp, 1, 1); |
| 1017 | stl_enablerxtx(portp, 1, 1); |
| 1018 | stl_startrxtx(portp, 1, 0); |
| 1019 | clear_bit(TTY_IO_ERROR, &tty->flags); |
| 1020 | portp->flags |= ASYNC_INITIALIZED; |
| 1021 | } |
| 1022 | |
| 1023 | /* |
| 1024 | * Check if this port is in the middle of closing. If so then wait |
| 1025 | * until it is closed then return error status, based on flag settings. |
| 1026 | * The sleep here does not need interrupt protection since the wakeup |
| 1027 | * for it is done with the same context. |
| 1028 | */ |
| 1029 | if (portp->flags & ASYNC_CLOSING) { |
| 1030 | interruptible_sleep_on(&portp->close_wait); |
| 1031 | if (portp->flags & ASYNC_HUP_NOTIFY) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1032 | return -EAGAIN; |
| 1033 | return -ERESTARTSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | } |
| 1035 | |
| 1036 | /* |
| 1037 | * Based on type of open being done check if it can overlap with any |
| 1038 | * previous opens still in effect. If we are a normal serial device |
| 1039 | * then also we might have to wait for carrier. |
| 1040 | */ |
| 1041 | if (!(filp->f_flags & O_NONBLOCK)) { |
| 1042 | if ((rc = stl_waitcarrier(portp, filp)) != 0) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1043 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | } |
| 1045 | portp->flags |= ASYNC_NORMAL_ACTIVE; |
| 1046 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1047 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | } |
| 1049 | |
| 1050 | /*****************************************************************************/ |
| 1051 | |
| 1052 | /* |
| 1053 | * Possibly need to wait for carrier (DCD signal) to come high. Say |
| 1054 | * maybe because if we are clocal then we don't need to wait... |
| 1055 | */ |
| 1056 | |
| 1057 | static int stl_waitcarrier(stlport_t *portp, struct file *filp) |
| 1058 | { |
| 1059 | unsigned long flags; |
| 1060 | int rc, doclocal; |
| 1061 | |
| 1062 | #ifdef DEBUG |
| 1063 | printk("stl_waitcarrier(portp=%x,filp=%x)\n", (int) portp, (int) filp); |
| 1064 | #endif |
| 1065 | |
| 1066 | rc = 0; |
| 1067 | doclocal = 0; |
| 1068 | |
| 1069 | if (portp->tty->termios->c_cflag & CLOCAL) |
| 1070 | doclocal++; |
| 1071 | |
| 1072 | save_flags(flags); |
| 1073 | cli(); |
| 1074 | portp->openwaitcnt++; |
| 1075 | if (! tty_hung_up_p(filp)) |
| 1076 | portp->refcount--; |
| 1077 | |
| 1078 | for (;;) { |
| 1079 | stl_setsignals(portp, 1, 1); |
| 1080 | if (tty_hung_up_p(filp) || |
| 1081 | ((portp->flags & ASYNC_INITIALIZED) == 0)) { |
| 1082 | if (portp->flags & ASYNC_HUP_NOTIFY) |
| 1083 | rc = -EBUSY; |
| 1084 | else |
| 1085 | rc = -ERESTARTSYS; |
| 1086 | break; |
| 1087 | } |
| 1088 | if (((portp->flags & ASYNC_CLOSING) == 0) && |
| 1089 | (doclocal || (portp->sigs & TIOCM_CD))) { |
| 1090 | break; |
| 1091 | } |
| 1092 | if (signal_pending(current)) { |
| 1093 | rc = -ERESTARTSYS; |
| 1094 | break; |
| 1095 | } |
| 1096 | interruptible_sleep_on(&portp->open_wait); |
| 1097 | } |
| 1098 | |
| 1099 | if (! tty_hung_up_p(filp)) |
| 1100 | portp->refcount++; |
| 1101 | portp->openwaitcnt--; |
| 1102 | restore_flags(flags); |
| 1103 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1104 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | } |
| 1106 | |
| 1107 | /*****************************************************************************/ |
| 1108 | |
| 1109 | static void stl_close(struct tty_struct *tty, struct file *filp) |
| 1110 | { |
| 1111 | stlport_t *portp; |
| 1112 | unsigned long flags; |
| 1113 | |
| 1114 | #ifdef DEBUG |
| 1115 | printk("stl_close(tty=%x,filp=%x)\n", (int) tty, (int) filp); |
| 1116 | #endif |
| 1117 | |
| 1118 | portp = tty->driver_data; |
| 1119 | if (portp == (stlport_t *) NULL) |
| 1120 | return; |
| 1121 | |
| 1122 | save_flags(flags); |
| 1123 | cli(); |
| 1124 | if (tty_hung_up_p(filp)) { |
| 1125 | restore_flags(flags); |
| 1126 | return; |
| 1127 | } |
| 1128 | if ((tty->count == 1) && (portp->refcount != 1)) |
| 1129 | portp->refcount = 1; |
| 1130 | if (portp->refcount-- > 1) { |
| 1131 | restore_flags(flags); |
| 1132 | return; |
| 1133 | } |
| 1134 | |
| 1135 | portp->refcount = 0; |
| 1136 | portp->flags |= ASYNC_CLOSING; |
| 1137 | |
| 1138 | /* |
| 1139 | * May want to wait for any data to drain before closing. The BUSY |
| 1140 | * flag keeps track of whether we are still sending or not - it is |
| 1141 | * very accurate for the cd1400, not quite so for the sc26198. |
| 1142 | * (The sc26198 has no "end-of-data" interrupt only empty FIFO) |
| 1143 | */ |
| 1144 | tty->closing = 1; |
| 1145 | if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE) |
| 1146 | tty_wait_until_sent(tty, portp->closing_wait); |
| 1147 | stl_waituntilsent(tty, (HZ / 2)); |
| 1148 | |
| 1149 | portp->flags &= ~ASYNC_INITIALIZED; |
| 1150 | stl_disableintrs(portp); |
| 1151 | if (tty->termios->c_cflag & HUPCL) |
| 1152 | stl_setsignals(portp, 0, 0); |
| 1153 | stl_enablerxtx(portp, 0, 0); |
| 1154 | stl_flushbuffer(tty); |
| 1155 | portp->istate = 0; |
| 1156 | if (portp->tx.buf != (char *) NULL) { |
| 1157 | kfree(portp->tx.buf); |
| 1158 | portp->tx.buf = (char *) NULL; |
| 1159 | portp->tx.head = (char *) NULL; |
| 1160 | portp->tx.tail = (char *) NULL; |
| 1161 | } |
| 1162 | set_bit(TTY_IO_ERROR, &tty->flags); |
| 1163 | tty_ldisc_flush(tty); |
| 1164 | |
| 1165 | tty->closing = 0; |
| 1166 | portp->tty = (struct tty_struct *) NULL; |
| 1167 | |
| 1168 | if (portp->openwaitcnt) { |
| 1169 | if (portp->close_delay) |
| 1170 | msleep_interruptible(jiffies_to_msecs(portp->close_delay)); |
| 1171 | wake_up_interruptible(&portp->open_wait); |
| 1172 | } |
| 1173 | |
| 1174 | portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
| 1175 | wake_up_interruptible(&portp->close_wait); |
| 1176 | restore_flags(flags); |
| 1177 | } |
| 1178 | |
| 1179 | /*****************************************************************************/ |
| 1180 | |
| 1181 | /* |
| 1182 | * Write routine. Take data and stuff it in to the TX ring queue. |
| 1183 | * If transmit interrupts are not running then start them. |
| 1184 | */ |
| 1185 | |
| 1186 | static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count) |
| 1187 | { |
| 1188 | stlport_t *portp; |
| 1189 | unsigned int len, stlen; |
| 1190 | unsigned char *chbuf; |
| 1191 | char *head, *tail; |
| 1192 | |
| 1193 | #ifdef DEBUG |
| 1194 | printk("stl_write(tty=%x,buf=%x,count=%d)\n", |
| 1195 | (int) tty, (int) buf, count); |
| 1196 | #endif |
| 1197 | |
| 1198 | if ((tty == (struct tty_struct *) NULL) || |
| 1199 | (stl_tmpwritebuf == (char *) NULL)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1200 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | portp = tty->driver_data; |
| 1202 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1203 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | if (portp->tx.buf == (char *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1205 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | |
| 1207 | /* |
| 1208 | * If copying direct from user space we must cater for page faults, |
| 1209 | * causing us to "sleep" here for a while. To handle this copy in all |
| 1210 | * the data we need now, into a local buffer. Then when we got it all |
| 1211 | * copy it into the TX buffer. |
| 1212 | */ |
| 1213 | chbuf = (unsigned char *) buf; |
| 1214 | |
| 1215 | head = portp->tx.head; |
| 1216 | tail = portp->tx.tail; |
| 1217 | if (head >= tail) { |
| 1218 | len = STL_TXBUFSIZE - (head - tail) - 1; |
| 1219 | stlen = STL_TXBUFSIZE - (head - portp->tx.buf); |
| 1220 | } else { |
| 1221 | len = tail - head - 1; |
| 1222 | stlen = len; |
| 1223 | } |
| 1224 | |
| 1225 | len = MIN(len, count); |
| 1226 | count = 0; |
| 1227 | while (len > 0) { |
| 1228 | stlen = MIN(len, stlen); |
| 1229 | memcpy(head, chbuf, stlen); |
| 1230 | len -= stlen; |
| 1231 | chbuf += stlen; |
| 1232 | count += stlen; |
| 1233 | head += stlen; |
| 1234 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) { |
| 1235 | head = portp->tx.buf; |
| 1236 | stlen = tail - head; |
| 1237 | } |
| 1238 | } |
| 1239 | portp->tx.head = head; |
| 1240 | |
| 1241 | clear_bit(ASYI_TXLOW, &portp->istate); |
| 1242 | stl_startrxtx(portp, -1, 1); |
| 1243 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1244 | return count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | } |
| 1246 | |
| 1247 | /*****************************************************************************/ |
| 1248 | |
| 1249 | static void stl_putchar(struct tty_struct *tty, unsigned char ch) |
| 1250 | { |
| 1251 | stlport_t *portp; |
| 1252 | unsigned int len; |
| 1253 | char *head, *tail; |
| 1254 | |
| 1255 | #ifdef DEBUG |
| 1256 | printk("stl_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch); |
| 1257 | #endif |
| 1258 | |
| 1259 | if (tty == (struct tty_struct *) NULL) |
| 1260 | return; |
| 1261 | portp = tty->driver_data; |
| 1262 | if (portp == (stlport_t *) NULL) |
| 1263 | return; |
| 1264 | if (portp->tx.buf == (char *) NULL) |
| 1265 | return; |
| 1266 | |
| 1267 | head = portp->tx.head; |
| 1268 | tail = portp->tx.tail; |
| 1269 | |
| 1270 | len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head); |
| 1271 | len--; |
| 1272 | |
| 1273 | if (len > 0) { |
| 1274 | *head++ = ch; |
| 1275 | if (head >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 1276 | head = portp->tx.buf; |
| 1277 | } |
| 1278 | portp->tx.head = head; |
| 1279 | } |
| 1280 | |
| 1281 | /*****************************************************************************/ |
| 1282 | |
| 1283 | /* |
| 1284 | * If there are any characters in the buffer then make sure that TX |
| 1285 | * interrupts are on and get'em out. Normally used after the putchar |
| 1286 | * routine has been called. |
| 1287 | */ |
| 1288 | |
| 1289 | static void stl_flushchars(struct tty_struct *tty) |
| 1290 | { |
| 1291 | stlport_t *portp; |
| 1292 | |
| 1293 | #ifdef DEBUG |
| 1294 | printk("stl_flushchars(tty=%x)\n", (int) tty); |
| 1295 | #endif |
| 1296 | |
| 1297 | if (tty == (struct tty_struct *) NULL) |
| 1298 | return; |
| 1299 | portp = tty->driver_data; |
| 1300 | if (portp == (stlport_t *) NULL) |
| 1301 | return; |
| 1302 | if (portp->tx.buf == (char *) NULL) |
| 1303 | return; |
| 1304 | |
| 1305 | #if 0 |
| 1306 | if (tty->stopped || tty->hw_stopped || |
| 1307 | (portp->tx.head == portp->tx.tail)) |
| 1308 | return; |
| 1309 | #endif |
| 1310 | stl_startrxtx(portp, -1, 1); |
| 1311 | } |
| 1312 | |
| 1313 | /*****************************************************************************/ |
| 1314 | |
| 1315 | static int stl_writeroom(struct tty_struct *tty) |
| 1316 | { |
| 1317 | stlport_t *portp; |
| 1318 | char *head, *tail; |
| 1319 | |
| 1320 | #ifdef DEBUG |
| 1321 | printk("stl_writeroom(tty=%x)\n", (int) tty); |
| 1322 | #endif |
| 1323 | |
| 1324 | if (tty == (struct tty_struct *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1325 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | portp = tty->driver_data; |
| 1327 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1328 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | if (portp->tx.buf == (char *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1330 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
| 1332 | head = portp->tx.head; |
| 1333 | tail = portp->tx.tail; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1334 | return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | } |
| 1336 | |
| 1337 | /*****************************************************************************/ |
| 1338 | |
| 1339 | /* |
| 1340 | * Return number of chars in the TX buffer. Normally we would just |
| 1341 | * calculate the number of chars in the buffer and return that, but if |
| 1342 | * the buffer is empty and TX interrupts are still on then we return |
| 1343 | * that the buffer still has 1 char in it. This way whoever called us |
| 1344 | * will not think that ALL chars have drained - since the UART still |
| 1345 | * must have some chars in it (we are busy after all). |
| 1346 | */ |
| 1347 | |
| 1348 | static int stl_charsinbuffer(struct tty_struct *tty) |
| 1349 | { |
| 1350 | stlport_t *portp; |
| 1351 | unsigned int size; |
| 1352 | char *head, *tail; |
| 1353 | |
| 1354 | #ifdef DEBUG |
| 1355 | printk("stl_charsinbuffer(tty=%x)\n", (int) tty); |
| 1356 | #endif |
| 1357 | |
| 1358 | if (tty == (struct tty_struct *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1359 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | portp = tty->driver_data; |
| 1361 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1362 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | if (portp->tx.buf == (char *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1364 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | |
| 1366 | head = portp->tx.head; |
| 1367 | tail = portp->tx.tail; |
| 1368 | size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 1369 | if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate)) |
| 1370 | size = 1; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1371 | return size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | } |
| 1373 | |
| 1374 | /*****************************************************************************/ |
| 1375 | |
| 1376 | /* |
| 1377 | * Generate the serial struct info. |
| 1378 | */ |
| 1379 | |
| 1380 | static int stl_getserial(stlport_t *portp, struct serial_struct __user *sp) |
| 1381 | { |
| 1382 | struct serial_struct sio; |
| 1383 | stlbrd_t *brdp; |
| 1384 | |
| 1385 | #ifdef DEBUG |
| 1386 | printk("stl_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); |
| 1387 | #endif |
| 1388 | |
| 1389 | memset(&sio, 0, sizeof(struct serial_struct)); |
| 1390 | sio.line = portp->portnr; |
| 1391 | sio.port = portp->ioaddr; |
| 1392 | sio.flags = portp->flags; |
| 1393 | sio.baud_base = portp->baud_base; |
| 1394 | sio.close_delay = portp->close_delay; |
| 1395 | sio.closing_wait = portp->closing_wait; |
| 1396 | sio.custom_divisor = portp->custom_divisor; |
| 1397 | sio.hub6 = 0; |
| 1398 | if (portp->uartp == &stl_cd1400uart) { |
| 1399 | sio.type = PORT_CIRRUS; |
| 1400 | sio.xmit_fifo_size = CD1400_TXFIFOSIZE; |
| 1401 | } else { |
| 1402 | sio.type = PORT_UNKNOWN; |
| 1403 | sio.xmit_fifo_size = SC26198_TXFIFOSIZE; |
| 1404 | } |
| 1405 | |
| 1406 | brdp = stl_brds[portp->brdnr]; |
| 1407 | if (brdp != (stlbrd_t *) NULL) |
| 1408 | sio.irq = brdp->irq; |
| 1409 | |
| 1410 | return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0; |
| 1411 | } |
| 1412 | |
| 1413 | /*****************************************************************************/ |
| 1414 | |
| 1415 | /* |
| 1416 | * Set port according to the serial struct info. |
| 1417 | * At this point we do not do any auto-configure stuff, so we will |
| 1418 | * just quietly ignore any requests to change irq, etc. |
| 1419 | */ |
| 1420 | |
| 1421 | static int stl_setserial(stlport_t *portp, struct serial_struct __user *sp) |
| 1422 | { |
| 1423 | struct serial_struct sio; |
| 1424 | |
| 1425 | #ifdef DEBUG |
| 1426 | printk("stl_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp); |
| 1427 | #endif |
| 1428 | |
| 1429 | if (copy_from_user(&sio, sp, sizeof(struct serial_struct))) |
| 1430 | return -EFAULT; |
| 1431 | if (!capable(CAP_SYS_ADMIN)) { |
| 1432 | if ((sio.baud_base != portp->baud_base) || |
| 1433 | (sio.close_delay != portp->close_delay) || |
| 1434 | ((sio.flags & ~ASYNC_USR_MASK) != |
| 1435 | (portp->flags & ~ASYNC_USR_MASK))) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1436 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | } |
| 1438 | |
| 1439 | portp->flags = (portp->flags & ~ASYNC_USR_MASK) | |
| 1440 | (sio.flags & ASYNC_USR_MASK); |
| 1441 | portp->baud_base = sio.baud_base; |
| 1442 | portp->close_delay = sio.close_delay; |
| 1443 | portp->closing_wait = sio.closing_wait; |
| 1444 | portp->custom_divisor = sio.custom_divisor; |
| 1445 | stl_setport(portp, portp->tty->termios); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1446 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | } |
| 1448 | |
| 1449 | /*****************************************************************************/ |
| 1450 | |
| 1451 | static int stl_tiocmget(struct tty_struct *tty, struct file *file) |
| 1452 | { |
| 1453 | stlport_t *portp; |
| 1454 | |
| 1455 | if (tty == (struct tty_struct *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1456 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | portp = tty->driver_data; |
| 1458 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1459 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1461 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | |
| 1463 | return stl_getsignals(portp); |
| 1464 | } |
| 1465 | |
| 1466 | static int stl_tiocmset(struct tty_struct *tty, struct file *file, |
| 1467 | unsigned int set, unsigned int clear) |
| 1468 | { |
| 1469 | stlport_t *portp; |
| 1470 | int rts = -1, dtr = -1; |
| 1471 | |
| 1472 | if (tty == (struct tty_struct *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1473 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | portp = tty->driver_data; |
| 1475 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1476 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1478 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | |
| 1480 | if (set & TIOCM_RTS) |
| 1481 | rts = 1; |
| 1482 | if (set & TIOCM_DTR) |
| 1483 | dtr = 1; |
| 1484 | if (clear & TIOCM_RTS) |
| 1485 | rts = 0; |
| 1486 | if (clear & TIOCM_DTR) |
| 1487 | dtr = 0; |
| 1488 | |
| 1489 | stl_setsignals(portp, dtr, rts); |
| 1490 | return 0; |
| 1491 | } |
| 1492 | |
| 1493 | static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) |
| 1494 | { |
| 1495 | stlport_t *portp; |
| 1496 | unsigned int ival; |
| 1497 | int rc; |
| 1498 | void __user *argp = (void __user *)arg; |
| 1499 | |
| 1500 | #ifdef DEBUG |
| 1501 | printk("stl_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", |
| 1502 | (int) tty, (int) file, cmd, (int) arg); |
| 1503 | #endif |
| 1504 | |
| 1505 | if (tty == (struct tty_struct *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1506 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | portp = tty->driver_data; |
| 1508 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1509 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | |
| 1511 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
| 1512 | (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) { |
| 1513 | if (tty->flags & (1 << TTY_IO_ERROR)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1514 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | } |
| 1516 | |
| 1517 | rc = 0; |
| 1518 | |
| 1519 | switch (cmd) { |
| 1520 | case TIOCGSOFTCAR: |
| 1521 | rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), |
| 1522 | (unsigned __user *) argp); |
| 1523 | break; |
| 1524 | case TIOCSSOFTCAR: |
| 1525 | if (get_user(ival, (unsigned int __user *) arg)) |
| 1526 | return -EFAULT; |
| 1527 | tty->termios->c_cflag = |
| 1528 | (tty->termios->c_cflag & ~CLOCAL) | |
| 1529 | (ival ? CLOCAL : 0); |
| 1530 | break; |
| 1531 | case TIOCGSERIAL: |
| 1532 | rc = stl_getserial(portp, argp); |
| 1533 | break; |
| 1534 | case TIOCSSERIAL: |
| 1535 | rc = stl_setserial(portp, argp); |
| 1536 | break; |
| 1537 | case COM_GETPORTSTATS: |
| 1538 | rc = stl_getportstats(portp, argp); |
| 1539 | break; |
| 1540 | case COM_CLRPORTSTATS: |
| 1541 | rc = stl_clrportstats(portp, argp); |
| 1542 | break; |
| 1543 | case TIOCSERCONFIG: |
| 1544 | case TIOCSERGWILD: |
| 1545 | case TIOCSERSWILD: |
| 1546 | case TIOCSERGETLSR: |
| 1547 | case TIOCSERGSTRUCT: |
| 1548 | case TIOCSERGETMULTI: |
| 1549 | case TIOCSERSETMULTI: |
| 1550 | default: |
| 1551 | rc = -ENOIOCTLCMD; |
| 1552 | break; |
| 1553 | } |
| 1554 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1555 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | } |
| 1557 | |
| 1558 | /*****************************************************************************/ |
| 1559 | |
| 1560 | static void stl_settermios(struct tty_struct *tty, struct termios *old) |
| 1561 | { |
| 1562 | stlport_t *portp; |
| 1563 | struct termios *tiosp; |
| 1564 | |
| 1565 | #ifdef DEBUG |
| 1566 | printk("stl_settermios(tty=%x,old=%x)\n", (int) tty, (int) old); |
| 1567 | #endif |
| 1568 | |
| 1569 | if (tty == (struct tty_struct *) NULL) |
| 1570 | return; |
| 1571 | portp = tty->driver_data; |
| 1572 | if (portp == (stlport_t *) NULL) |
| 1573 | return; |
| 1574 | |
| 1575 | tiosp = tty->termios; |
| 1576 | if ((tiosp->c_cflag == old->c_cflag) && |
| 1577 | (tiosp->c_iflag == old->c_iflag)) |
| 1578 | return; |
| 1579 | |
| 1580 | stl_setport(portp, tiosp); |
| 1581 | stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0), |
| 1582 | -1); |
| 1583 | if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) { |
| 1584 | tty->hw_stopped = 0; |
| 1585 | stl_start(tty); |
| 1586 | } |
| 1587 | if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL)) |
| 1588 | wake_up_interruptible(&portp->open_wait); |
| 1589 | } |
| 1590 | |
| 1591 | /*****************************************************************************/ |
| 1592 | |
| 1593 | /* |
| 1594 | * Attempt to flow control who ever is sending us data. Based on termios |
| 1595 | * settings use software or/and hardware flow control. |
| 1596 | */ |
| 1597 | |
| 1598 | static void stl_throttle(struct tty_struct *tty) |
| 1599 | { |
| 1600 | stlport_t *portp; |
| 1601 | |
| 1602 | #ifdef DEBUG |
| 1603 | printk("stl_throttle(tty=%x)\n", (int) tty); |
| 1604 | #endif |
| 1605 | |
| 1606 | if (tty == (struct tty_struct *) NULL) |
| 1607 | return; |
| 1608 | portp = tty->driver_data; |
| 1609 | if (portp == (stlport_t *) NULL) |
| 1610 | return; |
| 1611 | stl_flowctrl(portp, 0); |
| 1612 | } |
| 1613 | |
| 1614 | /*****************************************************************************/ |
| 1615 | |
| 1616 | /* |
| 1617 | * Unflow control the device sending us data... |
| 1618 | */ |
| 1619 | |
| 1620 | static void stl_unthrottle(struct tty_struct *tty) |
| 1621 | { |
| 1622 | stlport_t *portp; |
| 1623 | |
| 1624 | #ifdef DEBUG |
| 1625 | printk("stl_unthrottle(tty=%x)\n", (int) tty); |
| 1626 | #endif |
| 1627 | |
| 1628 | if (tty == (struct tty_struct *) NULL) |
| 1629 | return; |
| 1630 | portp = tty->driver_data; |
| 1631 | if (portp == (stlport_t *) NULL) |
| 1632 | return; |
| 1633 | stl_flowctrl(portp, 1); |
| 1634 | } |
| 1635 | |
| 1636 | /*****************************************************************************/ |
| 1637 | |
| 1638 | /* |
| 1639 | * Stop the transmitter. Basically to do this we will just turn TX |
| 1640 | * interrupts off. |
| 1641 | */ |
| 1642 | |
| 1643 | static void stl_stop(struct tty_struct *tty) |
| 1644 | { |
| 1645 | stlport_t *portp; |
| 1646 | |
| 1647 | #ifdef DEBUG |
| 1648 | printk("stl_stop(tty=%x)\n", (int) tty); |
| 1649 | #endif |
| 1650 | |
| 1651 | if (tty == (struct tty_struct *) NULL) |
| 1652 | return; |
| 1653 | portp = tty->driver_data; |
| 1654 | if (portp == (stlport_t *) NULL) |
| 1655 | return; |
| 1656 | stl_startrxtx(portp, -1, 0); |
| 1657 | } |
| 1658 | |
| 1659 | /*****************************************************************************/ |
| 1660 | |
| 1661 | /* |
| 1662 | * Start the transmitter again. Just turn TX interrupts back on. |
| 1663 | */ |
| 1664 | |
| 1665 | static void stl_start(struct tty_struct *tty) |
| 1666 | { |
| 1667 | stlport_t *portp; |
| 1668 | |
| 1669 | #ifdef DEBUG |
| 1670 | printk("stl_start(tty=%x)\n", (int) tty); |
| 1671 | #endif |
| 1672 | |
| 1673 | if (tty == (struct tty_struct *) NULL) |
| 1674 | return; |
| 1675 | portp = tty->driver_data; |
| 1676 | if (portp == (stlport_t *) NULL) |
| 1677 | return; |
| 1678 | stl_startrxtx(portp, -1, 1); |
| 1679 | } |
| 1680 | |
| 1681 | /*****************************************************************************/ |
| 1682 | |
| 1683 | /* |
| 1684 | * Hangup this port. This is pretty much like closing the port, only |
| 1685 | * a little more brutal. No waiting for data to drain. Shutdown the |
| 1686 | * port and maybe drop signals. |
| 1687 | */ |
| 1688 | |
| 1689 | static void stl_hangup(struct tty_struct *tty) |
| 1690 | { |
| 1691 | stlport_t *portp; |
| 1692 | |
| 1693 | #ifdef DEBUG |
| 1694 | printk("stl_hangup(tty=%x)\n", (int) tty); |
| 1695 | #endif |
| 1696 | |
| 1697 | if (tty == (struct tty_struct *) NULL) |
| 1698 | return; |
| 1699 | portp = tty->driver_data; |
| 1700 | if (portp == (stlport_t *) NULL) |
| 1701 | return; |
| 1702 | |
| 1703 | portp->flags &= ~ASYNC_INITIALIZED; |
| 1704 | stl_disableintrs(portp); |
| 1705 | if (tty->termios->c_cflag & HUPCL) |
| 1706 | stl_setsignals(portp, 0, 0); |
| 1707 | stl_enablerxtx(portp, 0, 0); |
| 1708 | stl_flushbuffer(tty); |
| 1709 | portp->istate = 0; |
| 1710 | set_bit(TTY_IO_ERROR, &tty->flags); |
| 1711 | if (portp->tx.buf != (char *) NULL) { |
| 1712 | kfree(portp->tx.buf); |
| 1713 | portp->tx.buf = (char *) NULL; |
| 1714 | portp->tx.head = (char *) NULL; |
| 1715 | portp->tx.tail = (char *) NULL; |
| 1716 | } |
| 1717 | portp->tty = (struct tty_struct *) NULL; |
| 1718 | portp->flags &= ~ASYNC_NORMAL_ACTIVE; |
| 1719 | portp->refcount = 0; |
| 1720 | wake_up_interruptible(&portp->open_wait); |
| 1721 | } |
| 1722 | |
| 1723 | /*****************************************************************************/ |
| 1724 | |
| 1725 | static void stl_flushbuffer(struct tty_struct *tty) |
| 1726 | { |
| 1727 | stlport_t *portp; |
| 1728 | |
| 1729 | #ifdef DEBUG |
| 1730 | printk("stl_flushbuffer(tty=%x)\n", (int) tty); |
| 1731 | #endif |
| 1732 | |
| 1733 | if (tty == (struct tty_struct *) NULL) |
| 1734 | return; |
| 1735 | portp = tty->driver_data; |
| 1736 | if (portp == (stlport_t *) NULL) |
| 1737 | return; |
| 1738 | |
| 1739 | stl_flush(portp); |
| 1740 | tty_wakeup(tty); |
| 1741 | } |
| 1742 | |
| 1743 | /*****************************************************************************/ |
| 1744 | |
| 1745 | static void stl_breakctl(struct tty_struct *tty, int state) |
| 1746 | { |
| 1747 | stlport_t *portp; |
| 1748 | |
| 1749 | #ifdef DEBUG |
| 1750 | printk("stl_breakctl(tty=%x,state=%d)\n", (int) tty, state); |
| 1751 | #endif |
| 1752 | |
| 1753 | if (tty == (struct tty_struct *) NULL) |
| 1754 | return; |
| 1755 | portp = tty->driver_data; |
| 1756 | if (portp == (stlport_t *) NULL) |
| 1757 | return; |
| 1758 | |
| 1759 | stl_sendbreak(portp, ((state == -1) ? 1 : 2)); |
| 1760 | } |
| 1761 | |
| 1762 | /*****************************************************************************/ |
| 1763 | |
| 1764 | static void stl_waituntilsent(struct tty_struct *tty, int timeout) |
| 1765 | { |
| 1766 | stlport_t *portp; |
| 1767 | unsigned long tend; |
| 1768 | |
| 1769 | #ifdef DEBUG |
| 1770 | printk("stl_waituntilsent(tty=%x,timeout=%d)\n", (int) tty, timeout); |
| 1771 | #endif |
| 1772 | |
| 1773 | if (tty == (struct tty_struct *) NULL) |
| 1774 | return; |
| 1775 | portp = tty->driver_data; |
| 1776 | if (portp == (stlport_t *) NULL) |
| 1777 | return; |
| 1778 | |
| 1779 | if (timeout == 0) |
| 1780 | timeout = HZ; |
| 1781 | tend = jiffies + timeout; |
| 1782 | |
| 1783 | while (stl_datastate(portp)) { |
| 1784 | if (signal_pending(current)) |
| 1785 | break; |
| 1786 | msleep_interruptible(20); |
| 1787 | if (time_after_eq(jiffies, tend)) |
| 1788 | break; |
| 1789 | } |
| 1790 | } |
| 1791 | |
| 1792 | /*****************************************************************************/ |
| 1793 | |
| 1794 | static void stl_sendxchar(struct tty_struct *tty, char ch) |
| 1795 | { |
| 1796 | stlport_t *portp; |
| 1797 | |
| 1798 | #ifdef DEBUG |
| 1799 | printk("stl_sendxchar(tty=%x,ch=%x)\n", (int) tty, ch); |
| 1800 | #endif |
| 1801 | |
| 1802 | if (tty == (struct tty_struct *) NULL) |
| 1803 | return; |
| 1804 | portp = tty->driver_data; |
| 1805 | if (portp == (stlport_t *) NULL) |
| 1806 | return; |
| 1807 | |
| 1808 | if (ch == STOP_CHAR(tty)) |
| 1809 | stl_sendflow(portp, 0); |
| 1810 | else if (ch == START_CHAR(tty)) |
| 1811 | stl_sendflow(portp, 1); |
| 1812 | else |
| 1813 | stl_putchar(tty, ch); |
| 1814 | } |
| 1815 | |
| 1816 | /*****************************************************************************/ |
| 1817 | |
| 1818 | #define MAXLINE 80 |
| 1819 | |
| 1820 | /* |
| 1821 | * Format info for a specified port. The line is deliberately limited |
| 1822 | * to 80 characters. (If it is too long it will be truncated, if too |
| 1823 | * short then padded with spaces). |
| 1824 | */ |
| 1825 | |
| 1826 | static int stl_portinfo(stlport_t *portp, int portnr, char *pos) |
| 1827 | { |
| 1828 | char *sp; |
| 1829 | int sigs, cnt; |
| 1830 | |
| 1831 | sp = pos; |
| 1832 | sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d", |
| 1833 | portnr, (portp->hwid == 1) ? "SC26198" : "CD1400", |
| 1834 | (int) portp->stats.txtotal, (int) portp->stats.rxtotal); |
| 1835 | |
| 1836 | if (portp->stats.rxframing) |
| 1837 | sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing); |
| 1838 | if (portp->stats.rxparity) |
| 1839 | sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity); |
| 1840 | if (portp->stats.rxbreaks) |
| 1841 | sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks); |
| 1842 | if (portp->stats.rxoverrun) |
| 1843 | sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun); |
| 1844 | |
| 1845 | sigs = stl_getsignals(portp); |
| 1846 | cnt = sprintf(sp, "%s%s%s%s%s ", |
| 1847 | (sigs & TIOCM_RTS) ? "|RTS" : "", |
| 1848 | (sigs & TIOCM_CTS) ? "|CTS" : "", |
| 1849 | (sigs & TIOCM_DTR) ? "|DTR" : "", |
| 1850 | (sigs & TIOCM_CD) ? "|DCD" : "", |
| 1851 | (sigs & TIOCM_DSR) ? "|DSR" : ""); |
| 1852 | *sp = ' '; |
| 1853 | sp += cnt; |
| 1854 | |
| 1855 | for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++) |
| 1856 | *sp++ = ' '; |
| 1857 | if (cnt >= MAXLINE) |
| 1858 | pos[(MAXLINE - 2)] = '+'; |
| 1859 | pos[(MAXLINE - 1)] = '\n'; |
| 1860 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1861 | return MAXLINE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | } |
| 1863 | |
| 1864 | /*****************************************************************************/ |
| 1865 | |
| 1866 | /* |
| 1867 | * Port info, read from the /proc file system. |
| 1868 | */ |
| 1869 | |
| 1870 | static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data) |
| 1871 | { |
| 1872 | stlbrd_t *brdp; |
| 1873 | stlpanel_t *panelp; |
| 1874 | stlport_t *portp; |
| 1875 | int brdnr, panelnr, portnr, totalport; |
| 1876 | int curoff, maxoff; |
| 1877 | char *pos; |
| 1878 | |
| 1879 | #ifdef DEBUG |
| 1880 | printk("stl_readproc(page=%x,start=%x,off=%x,count=%d,eof=%x," |
| 1881 | "data=%x\n", (int) page, (int) start, (int) off, count, |
| 1882 | (int) eof, (int) data); |
| 1883 | #endif |
| 1884 | |
| 1885 | pos = page; |
| 1886 | totalport = 0; |
| 1887 | curoff = 0; |
| 1888 | |
| 1889 | if (off == 0) { |
| 1890 | pos += sprintf(pos, "%s: version %s", stl_drvtitle, |
| 1891 | stl_drvversion); |
| 1892 | while (pos < (page + MAXLINE - 1)) |
| 1893 | *pos++ = ' '; |
| 1894 | *pos++ = '\n'; |
| 1895 | } |
| 1896 | curoff = MAXLINE; |
| 1897 | |
| 1898 | /* |
| 1899 | * We scan through for each board, panel and port. The offset is |
| 1900 | * calculated on the fly, and irrelevant ports are skipped. |
| 1901 | */ |
| 1902 | for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) { |
| 1903 | brdp = stl_brds[brdnr]; |
| 1904 | if (brdp == (stlbrd_t *) NULL) |
| 1905 | continue; |
| 1906 | if (brdp->state == 0) |
| 1907 | continue; |
| 1908 | |
| 1909 | maxoff = curoff + (brdp->nrports * MAXLINE); |
| 1910 | if (off >= maxoff) { |
| 1911 | curoff = maxoff; |
| 1912 | continue; |
| 1913 | } |
| 1914 | |
| 1915 | totalport = brdnr * STL_MAXPORTS; |
| 1916 | for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) { |
| 1917 | panelp = brdp->panels[panelnr]; |
| 1918 | if (panelp == (stlpanel_t *) NULL) |
| 1919 | continue; |
| 1920 | |
| 1921 | maxoff = curoff + (panelp->nrports * MAXLINE); |
| 1922 | if (off >= maxoff) { |
| 1923 | curoff = maxoff; |
| 1924 | totalport += panelp->nrports; |
| 1925 | continue; |
| 1926 | } |
| 1927 | |
| 1928 | for (portnr = 0; (portnr < panelp->nrports); portnr++, |
| 1929 | totalport++) { |
| 1930 | portp = panelp->ports[portnr]; |
| 1931 | if (portp == (stlport_t *) NULL) |
| 1932 | continue; |
| 1933 | if (off >= (curoff += MAXLINE)) |
| 1934 | continue; |
| 1935 | if ((pos - page + MAXLINE) > count) |
| 1936 | goto stl_readdone; |
| 1937 | pos += stl_portinfo(portp, totalport, pos); |
| 1938 | } |
| 1939 | } |
| 1940 | } |
| 1941 | |
| 1942 | *eof = 1; |
| 1943 | |
| 1944 | stl_readdone: |
| 1945 | *start = page; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 1946 | return (pos - page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | } |
| 1948 | |
| 1949 | /*****************************************************************************/ |
| 1950 | |
| 1951 | /* |
| 1952 | * All board interrupts are vectored through here first. This code then |
| 1953 | * calls off to the approrpriate board interrupt handlers. |
| 1954 | */ |
| 1955 | |
| 1956 | static irqreturn_t stl_intr(int irq, void *dev_id, struct pt_regs *regs) |
| 1957 | { |
| 1958 | stlbrd_t *brdp = (stlbrd_t *) dev_id; |
| 1959 | |
| 1960 | #ifdef DEBUG |
| 1961 | printk("stl_intr(brdp=%x,irq=%d,regs=%x)\n", (int) brdp, irq, |
| 1962 | (int) regs); |
| 1963 | #endif |
| 1964 | |
| 1965 | return IRQ_RETVAL((* brdp->isr)(brdp)); |
| 1966 | } |
| 1967 | |
| 1968 | /*****************************************************************************/ |
| 1969 | |
| 1970 | /* |
| 1971 | * Interrupt service routine for EasyIO board types. |
| 1972 | */ |
| 1973 | |
| 1974 | static int stl_eiointr(stlbrd_t *brdp) |
| 1975 | { |
| 1976 | stlpanel_t *panelp; |
| 1977 | unsigned int iobase; |
| 1978 | int handled = 0; |
| 1979 | |
| 1980 | panelp = brdp->panels[0]; |
| 1981 | iobase = panelp->iobase; |
| 1982 | while (inb(brdp->iostatus) & EIO_INTRPEND) { |
| 1983 | handled = 1; |
| 1984 | (* panelp->isr)(panelp, iobase); |
| 1985 | } |
| 1986 | return handled; |
| 1987 | } |
| 1988 | |
| 1989 | /*****************************************************************************/ |
| 1990 | |
| 1991 | /* |
| 1992 | * Interrupt service routine for ECH-AT board types. |
| 1993 | */ |
| 1994 | |
| 1995 | static int stl_echatintr(stlbrd_t *brdp) |
| 1996 | { |
| 1997 | stlpanel_t *panelp; |
| 1998 | unsigned int ioaddr; |
| 1999 | int bnknr; |
| 2000 | int handled = 0; |
| 2001 | |
| 2002 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
| 2003 | |
| 2004 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
| 2005 | handled = 1; |
| 2006 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 2007 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 2008 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 2009 | panelp = brdp->bnk2panel[bnknr]; |
| 2010 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 2011 | } |
| 2012 | } |
| 2013 | } |
| 2014 | |
| 2015 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| 2016 | |
| 2017 | return handled; |
| 2018 | } |
| 2019 | |
| 2020 | /*****************************************************************************/ |
| 2021 | |
| 2022 | /* |
| 2023 | * Interrupt service routine for ECH-MCA board types. |
| 2024 | */ |
| 2025 | |
| 2026 | static int stl_echmcaintr(stlbrd_t *brdp) |
| 2027 | { |
| 2028 | stlpanel_t *panelp; |
| 2029 | unsigned int ioaddr; |
| 2030 | int bnknr; |
| 2031 | int handled = 0; |
| 2032 | |
| 2033 | while (inb(brdp->iostatus) & ECH_INTRPEND) { |
| 2034 | handled = 1; |
| 2035 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 2036 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 2037 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 2038 | panelp = brdp->bnk2panel[bnknr]; |
| 2039 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 2040 | } |
| 2041 | } |
| 2042 | } |
| 2043 | return handled; |
| 2044 | } |
| 2045 | |
| 2046 | /*****************************************************************************/ |
| 2047 | |
| 2048 | /* |
| 2049 | * Interrupt service routine for ECH-PCI board types. |
| 2050 | */ |
| 2051 | |
| 2052 | static int stl_echpciintr(stlbrd_t *brdp) |
| 2053 | { |
| 2054 | stlpanel_t *panelp; |
| 2055 | unsigned int ioaddr; |
| 2056 | int bnknr, recheck; |
| 2057 | int handled = 0; |
| 2058 | |
| 2059 | while (1) { |
| 2060 | recheck = 0; |
| 2061 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 2062 | outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl); |
| 2063 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 2064 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 2065 | panelp = brdp->bnk2panel[bnknr]; |
| 2066 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 2067 | recheck++; |
| 2068 | handled = 1; |
| 2069 | } |
| 2070 | } |
| 2071 | if (! recheck) |
| 2072 | break; |
| 2073 | } |
| 2074 | return handled; |
| 2075 | } |
| 2076 | |
| 2077 | /*****************************************************************************/ |
| 2078 | |
| 2079 | /* |
| 2080 | * Interrupt service routine for ECH-8/64-PCI board types. |
| 2081 | */ |
| 2082 | |
| 2083 | static int stl_echpci64intr(stlbrd_t *brdp) |
| 2084 | { |
| 2085 | stlpanel_t *panelp; |
| 2086 | unsigned int ioaddr; |
| 2087 | int bnknr; |
| 2088 | int handled = 0; |
| 2089 | |
| 2090 | while (inb(brdp->ioctrl) & 0x1) { |
| 2091 | handled = 1; |
| 2092 | for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) { |
| 2093 | ioaddr = brdp->bnkstataddr[bnknr]; |
| 2094 | if (inb(ioaddr) & ECH_PNLINTRPEND) { |
| 2095 | panelp = brdp->bnk2panel[bnknr]; |
| 2096 | (* panelp->isr)(panelp, (ioaddr & 0xfffc)); |
| 2097 | } |
| 2098 | } |
| 2099 | } |
| 2100 | |
| 2101 | return handled; |
| 2102 | } |
| 2103 | |
| 2104 | /*****************************************************************************/ |
| 2105 | |
| 2106 | /* |
| 2107 | * Service an off-level request for some channel. |
| 2108 | */ |
| 2109 | static void stl_offintr(void *private) |
| 2110 | { |
| 2111 | stlport_t *portp; |
| 2112 | struct tty_struct *tty; |
| 2113 | unsigned int oldsigs; |
| 2114 | |
| 2115 | portp = private; |
| 2116 | |
| 2117 | #ifdef DEBUG |
| 2118 | printk("stl_offintr(portp=%x)\n", (int) portp); |
| 2119 | #endif |
| 2120 | |
| 2121 | if (portp == (stlport_t *) NULL) |
| 2122 | return; |
| 2123 | |
| 2124 | tty = portp->tty; |
| 2125 | if (tty == (struct tty_struct *) NULL) |
| 2126 | return; |
| 2127 | |
| 2128 | lock_kernel(); |
| 2129 | if (test_bit(ASYI_TXLOW, &portp->istate)) { |
| 2130 | tty_wakeup(tty); |
| 2131 | } |
| 2132 | if (test_bit(ASYI_DCDCHANGE, &portp->istate)) { |
| 2133 | clear_bit(ASYI_DCDCHANGE, &portp->istate); |
| 2134 | oldsigs = portp->sigs; |
| 2135 | portp->sigs = stl_getsignals(portp); |
| 2136 | if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0)) |
| 2137 | wake_up_interruptible(&portp->open_wait); |
| 2138 | if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) { |
| 2139 | if (portp->flags & ASYNC_CHECK_CD) |
| 2140 | tty_hangup(tty); /* FIXME: module removal race here - AKPM */ |
| 2141 | } |
| 2142 | } |
| 2143 | unlock_kernel(); |
| 2144 | } |
| 2145 | |
| 2146 | /*****************************************************************************/ |
| 2147 | |
| 2148 | /* |
| 2149 | * Initialize all the ports on a panel. |
| 2150 | */ |
| 2151 | |
| 2152 | static int __init stl_initports(stlbrd_t *brdp, stlpanel_t *panelp) |
| 2153 | { |
| 2154 | stlport_t *portp; |
| 2155 | int chipmask, i; |
| 2156 | |
| 2157 | #ifdef DEBUG |
| 2158 | printk("stl_initports(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); |
| 2159 | #endif |
| 2160 | |
| 2161 | chipmask = stl_panelinit(brdp, panelp); |
| 2162 | |
| 2163 | /* |
| 2164 | * All UART's are initialized (if found!). Now go through and setup |
| 2165 | * each ports data structures. |
| 2166 | */ |
| 2167 | for (i = 0; (i < panelp->nrports); i++) { |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame^] | 2168 | portp = kzalloc(sizeof(stlport_t), GFP_KERNEL); |
| 2169 | if (!portp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | printk("STALLION: failed to allocate memory " |
| 2171 | "(size=%d)\n", sizeof(stlport_t)); |
| 2172 | break; |
| 2173 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2174 | |
| 2175 | portp->magic = STL_PORTMAGIC; |
| 2176 | portp->portnr = i; |
| 2177 | portp->brdnr = panelp->brdnr; |
| 2178 | portp->panelnr = panelp->panelnr; |
| 2179 | portp->uartp = panelp->uartp; |
| 2180 | portp->clk = brdp->clk; |
| 2181 | portp->baud_base = STL_BAUDBASE; |
| 2182 | portp->close_delay = STL_CLOSEDELAY; |
| 2183 | portp->closing_wait = 30 * HZ; |
| 2184 | INIT_WORK(&portp->tqueue, stl_offintr, portp); |
| 2185 | init_waitqueue_head(&portp->open_wait); |
| 2186 | init_waitqueue_head(&portp->close_wait); |
| 2187 | portp->stats.brd = portp->brdnr; |
| 2188 | portp->stats.panel = portp->panelnr; |
| 2189 | portp->stats.port = portp->portnr; |
| 2190 | panelp->ports[i] = portp; |
| 2191 | stl_portinit(brdp, panelp, portp); |
| 2192 | } |
| 2193 | |
| 2194 | return(0); |
| 2195 | } |
| 2196 | |
| 2197 | /*****************************************************************************/ |
| 2198 | |
| 2199 | /* |
| 2200 | * Try to find and initialize an EasyIO board. |
| 2201 | */ |
| 2202 | |
| 2203 | static inline int stl_initeio(stlbrd_t *brdp) |
| 2204 | { |
| 2205 | stlpanel_t *panelp; |
| 2206 | unsigned int status; |
| 2207 | char *name; |
| 2208 | int rc; |
| 2209 | |
| 2210 | #ifdef DEBUG |
| 2211 | printk("stl_initeio(brdp=%x)\n", (int) brdp); |
| 2212 | #endif |
| 2213 | |
| 2214 | brdp->ioctrl = brdp->ioaddr1 + 1; |
| 2215 | brdp->iostatus = brdp->ioaddr1 + 2; |
| 2216 | |
| 2217 | status = inb(brdp->iostatus); |
| 2218 | if ((status & EIO_IDBITMASK) == EIO_MK3) |
| 2219 | brdp->ioctrl++; |
| 2220 | |
| 2221 | /* |
| 2222 | * Handle board specific stuff now. The real difference is PCI |
| 2223 | * or not PCI. |
| 2224 | */ |
| 2225 | if (brdp->brdtype == BRD_EASYIOPCI) { |
| 2226 | brdp->iosize1 = 0x80; |
| 2227 | brdp->iosize2 = 0x80; |
| 2228 | name = "serial(EIO-PCI)"; |
| 2229 | outb(0x41, (brdp->ioaddr2 + 0x4c)); |
| 2230 | } else { |
| 2231 | brdp->iosize1 = 8; |
| 2232 | name = "serial(EIO)"; |
| 2233 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2234 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2235 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2236 | brdp->irq, brdp->brdnr); |
| 2237 | return(-EINVAL); |
| 2238 | } |
| 2239 | outb((stl_vecmap[brdp->irq] | EIO_0WS | |
| 2240 | ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)), |
| 2241 | brdp->ioctrl); |
| 2242 | } |
| 2243 | |
| 2244 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
| 2245 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
| 2246 | "%x conflicts with another device\n", brdp->brdnr, |
| 2247 | brdp->ioaddr1); |
| 2248 | return(-EBUSY); |
| 2249 | } |
| 2250 | |
| 2251 | if (brdp->iosize2 > 0) |
| 2252 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
| 2253 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
| 2254 | "address %x conflicts with another device\n", |
| 2255 | brdp->brdnr, brdp->ioaddr2); |
| 2256 | printk(KERN_WARNING "STALLION: Warning, also " |
| 2257 | "releasing board %d I/O address %x \n", |
| 2258 | brdp->brdnr, brdp->ioaddr1); |
| 2259 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2260 | return(-EBUSY); |
| 2261 | } |
| 2262 | |
| 2263 | /* |
| 2264 | * Everything looks OK, so let's go ahead and probe for the hardware. |
| 2265 | */ |
| 2266 | brdp->clk = CD1400_CLK; |
| 2267 | brdp->isr = stl_eiointr; |
| 2268 | |
| 2269 | switch (status & EIO_IDBITMASK) { |
| 2270 | case EIO_8PORTM: |
| 2271 | brdp->clk = CD1400_CLK8M; |
| 2272 | /* fall thru */ |
| 2273 | case EIO_8PORTRS: |
| 2274 | case EIO_8PORTDI: |
| 2275 | brdp->nrports = 8; |
| 2276 | break; |
| 2277 | case EIO_4PORTRS: |
| 2278 | brdp->nrports = 4; |
| 2279 | break; |
| 2280 | case EIO_MK3: |
| 2281 | switch (status & EIO_BRDMASK) { |
| 2282 | case ID_BRD4: |
| 2283 | brdp->nrports = 4; |
| 2284 | break; |
| 2285 | case ID_BRD8: |
| 2286 | brdp->nrports = 8; |
| 2287 | break; |
| 2288 | case ID_BRD16: |
| 2289 | brdp->nrports = 16; |
| 2290 | break; |
| 2291 | default: |
| 2292 | return(-ENODEV); |
| 2293 | } |
| 2294 | break; |
| 2295 | default: |
| 2296 | return(-ENODEV); |
| 2297 | } |
| 2298 | |
| 2299 | /* |
| 2300 | * We have verified that the board is actually present, so now we |
| 2301 | * can complete the setup. |
| 2302 | */ |
| 2303 | |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame^] | 2304 | panelp = kzalloc(sizeof(stlpanel_t), GFP_KERNEL); |
| 2305 | if (!panelp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | printk(KERN_WARNING "STALLION: failed to allocate memory " |
| 2307 | "(size=%d)\n", sizeof(stlpanel_t)); |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame^] | 2308 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2310 | |
| 2311 | panelp->magic = STL_PANELMAGIC; |
| 2312 | panelp->brdnr = brdp->brdnr; |
| 2313 | panelp->panelnr = 0; |
| 2314 | panelp->nrports = brdp->nrports; |
| 2315 | panelp->iobase = brdp->ioaddr1; |
| 2316 | panelp->hwid = status; |
| 2317 | if ((status & EIO_IDBITMASK) == EIO_MK3) { |
| 2318 | panelp->uartp = (void *) &stl_sc26198uart; |
| 2319 | panelp->isr = stl_sc26198intr; |
| 2320 | } else { |
| 2321 | panelp->uartp = (void *) &stl_cd1400uart; |
| 2322 | panelp->isr = stl_cd1400eiointr; |
| 2323 | } |
| 2324 | |
| 2325 | brdp->panels[0] = panelp; |
| 2326 | brdp->nrpanels = 1; |
| 2327 | brdp->state |= BRD_FOUND; |
| 2328 | brdp->hwid = status; |
| 2329 | if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) { |
| 2330 | printk("STALLION: failed to register interrupt " |
| 2331 | "routine for %s irq=%d\n", name, brdp->irq); |
| 2332 | rc = -ENODEV; |
| 2333 | } else { |
| 2334 | rc = 0; |
| 2335 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 2336 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | } |
| 2338 | |
| 2339 | /*****************************************************************************/ |
| 2340 | |
| 2341 | /* |
| 2342 | * Try to find an ECH board and initialize it. This code is capable of |
| 2343 | * dealing with all types of ECH board. |
| 2344 | */ |
| 2345 | |
| 2346 | static inline int stl_initech(stlbrd_t *brdp) |
| 2347 | { |
| 2348 | stlpanel_t *panelp; |
| 2349 | unsigned int status, nxtid, ioaddr, conflict; |
| 2350 | int panelnr, banknr, i; |
| 2351 | char *name; |
| 2352 | |
| 2353 | #ifdef DEBUG |
| 2354 | printk("stl_initech(brdp=%x)\n", (int) brdp); |
| 2355 | #endif |
| 2356 | |
| 2357 | status = 0; |
| 2358 | conflict = 0; |
| 2359 | |
| 2360 | /* |
| 2361 | * Set up the initial board register contents for boards. This varies a |
| 2362 | * bit between the different board types. So we need to handle each |
| 2363 | * separately. Also do a check that the supplied IRQ is good. |
| 2364 | */ |
| 2365 | switch (brdp->brdtype) { |
| 2366 | |
| 2367 | case BRD_ECH: |
| 2368 | brdp->isr = stl_echatintr; |
| 2369 | brdp->ioctrl = brdp->ioaddr1 + 1; |
| 2370 | brdp->iostatus = brdp->ioaddr1 + 1; |
| 2371 | status = inb(brdp->iostatus); |
| 2372 | if ((status & ECH_IDBITMASK) != ECH_ID) |
| 2373 | return(-ENODEV); |
| 2374 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2375 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2376 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2377 | brdp->irq, brdp->brdnr); |
| 2378 | return(-EINVAL); |
| 2379 | } |
| 2380 | status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1); |
| 2381 | status |= (stl_vecmap[brdp->irq] << 1); |
| 2382 | outb((status | ECH_BRDRESET), brdp->ioaddr1); |
| 2383 | brdp->ioctrlval = ECH_INTENABLE | |
| 2384 | ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE); |
| 2385 | for (i = 0; (i < 10); i++) |
| 2386 | outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl); |
| 2387 | brdp->iosize1 = 2; |
| 2388 | brdp->iosize2 = 32; |
| 2389 | name = "serial(EC8/32)"; |
| 2390 | outb(status, brdp->ioaddr1); |
| 2391 | break; |
| 2392 | |
| 2393 | case BRD_ECHMC: |
| 2394 | brdp->isr = stl_echmcaintr; |
| 2395 | brdp->ioctrl = brdp->ioaddr1 + 0x20; |
| 2396 | brdp->iostatus = brdp->ioctrl; |
| 2397 | status = inb(brdp->iostatus); |
| 2398 | if ((status & ECH_IDBITMASK) != ECH_ID) |
| 2399 | return(-ENODEV); |
| 2400 | if ((brdp->irq < 0) || (brdp->irq > 15) || |
| 2401 | (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) { |
| 2402 | printk("STALLION: invalid irq=%d for brd=%d\n", |
| 2403 | brdp->irq, brdp->brdnr); |
| 2404 | return(-EINVAL); |
| 2405 | } |
| 2406 | outb(ECHMC_BRDRESET, brdp->ioctrl); |
| 2407 | outb(ECHMC_INTENABLE, brdp->ioctrl); |
| 2408 | brdp->iosize1 = 64; |
| 2409 | name = "serial(EC8/32-MC)"; |
| 2410 | break; |
| 2411 | |
| 2412 | case BRD_ECHPCI: |
| 2413 | brdp->isr = stl_echpciintr; |
| 2414 | brdp->ioctrl = brdp->ioaddr1 + 2; |
| 2415 | brdp->iosize1 = 4; |
| 2416 | brdp->iosize2 = 8; |
| 2417 | name = "serial(EC8/32-PCI)"; |
| 2418 | break; |
| 2419 | |
| 2420 | case BRD_ECH64PCI: |
| 2421 | brdp->isr = stl_echpci64intr; |
| 2422 | brdp->ioctrl = brdp->ioaddr2 + 0x40; |
| 2423 | outb(0x43, (brdp->ioaddr1 + 0x4c)); |
| 2424 | brdp->iosize1 = 0x80; |
| 2425 | brdp->iosize2 = 0x80; |
| 2426 | name = "serial(EC8/64-PCI)"; |
| 2427 | break; |
| 2428 | |
| 2429 | default: |
| 2430 | printk("STALLION: unknown board type=%d\n", brdp->brdtype); |
| 2431 | return(-EINVAL); |
| 2432 | break; |
| 2433 | } |
| 2434 | |
| 2435 | /* |
| 2436 | * Check boards for possible IO address conflicts and return fail status |
| 2437 | * if an IO conflict found. |
| 2438 | */ |
| 2439 | if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) { |
| 2440 | printk(KERN_WARNING "STALLION: Warning, board %d I/O address " |
| 2441 | "%x conflicts with another device\n", brdp->brdnr, |
| 2442 | brdp->ioaddr1); |
| 2443 | return(-EBUSY); |
| 2444 | } |
| 2445 | |
| 2446 | if (brdp->iosize2 > 0) |
| 2447 | if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) { |
| 2448 | printk(KERN_WARNING "STALLION: Warning, board %d I/O " |
| 2449 | "address %x conflicts with another device\n", |
| 2450 | brdp->brdnr, brdp->ioaddr2); |
| 2451 | printk(KERN_WARNING "STALLION: Warning, also " |
| 2452 | "releasing board %d I/O address %x \n", |
| 2453 | brdp->brdnr, brdp->ioaddr1); |
| 2454 | release_region(brdp->ioaddr1, brdp->iosize1); |
| 2455 | return(-EBUSY); |
| 2456 | } |
| 2457 | |
| 2458 | /* |
| 2459 | * Scan through the secondary io address space looking for panels. |
| 2460 | * As we find'em allocate and initialize panel structures for each. |
| 2461 | */ |
| 2462 | brdp->clk = CD1400_CLK; |
| 2463 | brdp->hwid = status; |
| 2464 | |
| 2465 | ioaddr = brdp->ioaddr2; |
| 2466 | banknr = 0; |
| 2467 | panelnr = 0; |
| 2468 | nxtid = 0; |
| 2469 | |
| 2470 | for (i = 0; (i < STL_MAXPANELS); i++) { |
| 2471 | if (brdp->brdtype == BRD_ECHPCI) { |
| 2472 | outb(nxtid, brdp->ioctrl); |
| 2473 | ioaddr = brdp->ioaddr2; |
| 2474 | } |
| 2475 | status = inb(ioaddr + ECH_PNLSTATUS); |
| 2476 | if ((status & ECH_PNLIDMASK) != nxtid) |
| 2477 | break; |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame^] | 2478 | panelp = kzalloc(sizeof(stlpanel_t), GFP_KERNEL); |
| 2479 | if (!panelp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2480 | printk("STALLION: failed to allocate memory " |
| 2481 | "(size=%d)\n", sizeof(stlpanel_t)); |
| 2482 | break; |
| 2483 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2484 | panelp->magic = STL_PANELMAGIC; |
| 2485 | panelp->brdnr = brdp->brdnr; |
| 2486 | panelp->panelnr = panelnr; |
| 2487 | panelp->iobase = ioaddr; |
| 2488 | panelp->pagenr = nxtid; |
| 2489 | panelp->hwid = status; |
| 2490 | brdp->bnk2panel[banknr] = panelp; |
| 2491 | brdp->bnkpageaddr[banknr] = nxtid; |
| 2492 | brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS; |
| 2493 | |
| 2494 | if (status & ECH_PNLXPID) { |
| 2495 | panelp->uartp = (void *) &stl_sc26198uart; |
| 2496 | panelp->isr = stl_sc26198intr; |
| 2497 | if (status & ECH_PNL16PORT) { |
| 2498 | panelp->nrports = 16; |
| 2499 | brdp->bnk2panel[banknr] = panelp; |
| 2500 | brdp->bnkpageaddr[banknr] = nxtid; |
| 2501 | brdp->bnkstataddr[banknr++] = ioaddr + 4 + |
| 2502 | ECH_PNLSTATUS; |
| 2503 | } else { |
| 2504 | panelp->nrports = 8; |
| 2505 | } |
| 2506 | } else { |
| 2507 | panelp->uartp = (void *) &stl_cd1400uart; |
| 2508 | panelp->isr = stl_cd1400echintr; |
| 2509 | if (status & ECH_PNL16PORT) { |
| 2510 | panelp->nrports = 16; |
| 2511 | panelp->ackmask = 0x80; |
| 2512 | if (brdp->brdtype != BRD_ECHPCI) |
| 2513 | ioaddr += EREG_BANKSIZE; |
| 2514 | brdp->bnk2panel[banknr] = panelp; |
| 2515 | brdp->bnkpageaddr[banknr] = ++nxtid; |
| 2516 | brdp->bnkstataddr[banknr++] = ioaddr + |
| 2517 | ECH_PNLSTATUS; |
| 2518 | } else { |
| 2519 | panelp->nrports = 8; |
| 2520 | panelp->ackmask = 0xc0; |
| 2521 | } |
| 2522 | } |
| 2523 | |
| 2524 | nxtid++; |
| 2525 | ioaddr += EREG_BANKSIZE; |
| 2526 | brdp->nrports += panelp->nrports; |
| 2527 | brdp->panels[panelnr++] = panelp; |
| 2528 | if ((brdp->brdtype != BRD_ECHPCI) && |
| 2529 | (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) |
| 2530 | break; |
| 2531 | } |
| 2532 | |
| 2533 | brdp->nrpanels = panelnr; |
| 2534 | brdp->nrbnks = banknr; |
| 2535 | if (brdp->brdtype == BRD_ECH) |
| 2536 | outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl); |
| 2537 | |
| 2538 | brdp->state |= BRD_FOUND; |
| 2539 | if (request_irq(brdp->irq, stl_intr, SA_SHIRQ, name, brdp) != 0) { |
| 2540 | printk("STALLION: failed to register interrupt " |
| 2541 | "routine for %s irq=%d\n", name, brdp->irq); |
| 2542 | i = -ENODEV; |
| 2543 | } else { |
| 2544 | i = 0; |
| 2545 | } |
| 2546 | |
| 2547 | return(i); |
| 2548 | } |
| 2549 | |
| 2550 | /*****************************************************************************/ |
| 2551 | |
| 2552 | /* |
| 2553 | * Initialize and configure the specified board. |
| 2554 | * Scan through all the boards in the configuration and see what we |
| 2555 | * can find. Handle EIO and the ECH boards a little differently here |
| 2556 | * since the initial search and setup is very different. |
| 2557 | */ |
| 2558 | |
| 2559 | static int __init stl_brdinit(stlbrd_t *brdp) |
| 2560 | { |
| 2561 | int i; |
| 2562 | |
| 2563 | #ifdef DEBUG |
| 2564 | printk("stl_brdinit(brdp=%x)\n", (int) brdp); |
| 2565 | #endif |
| 2566 | |
| 2567 | switch (brdp->brdtype) { |
| 2568 | case BRD_EASYIO: |
| 2569 | case BRD_EASYIOPCI: |
| 2570 | stl_initeio(brdp); |
| 2571 | break; |
| 2572 | case BRD_ECH: |
| 2573 | case BRD_ECHMC: |
| 2574 | case BRD_ECHPCI: |
| 2575 | case BRD_ECH64PCI: |
| 2576 | stl_initech(brdp); |
| 2577 | break; |
| 2578 | default: |
| 2579 | printk("STALLION: board=%d is unknown board type=%d\n", |
| 2580 | brdp->brdnr, brdp->brdtype); |
| 2581 | return(ENODEV); |
| 2582 | } |
| 2583 | |
| 2584 | stl_brds[brdp->brdnr] = brdp; |
| 2585 | if ((brdp->state & BRD_FOUND) == 0) { |
| 2586 | printk("STALLION: %s board not found, board=%d io=%x irq=%d\n", |
| 2587 | stl_brdnames[brdp->brdtype], brdp->brdnr, |
| 2588 | brdp->ioaddr1, brdp->irq); |
| 2589 | return(ENODEV); |
| 2590 | } |
| 2591 | |
| 2592 | for (i = 0; (i < STL_MAXPANELS); i++) |
| 2593 | if (brdp->panels[i] != (stlpanel_t *) NULL) |
| 2594 | stl_initports(brdp, brdp->panels[i]); |
| 2595 | |
| 2596 | printk("STALLION: %s found, board=%d io=%x irq=%d " |
| 2597 | "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype], |
| 2598 | brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels, |
| 2599 | brdp->nrports); |
| 2600 | return(0); |
| 2601 | } |
| 2602 | |
| 2603 | /*****************************************************************************/ |
| 2604 | |
| 2605 | /* |
| 2606 | * Find the next available board number that is free. |
| 2607 | */ |
| 2608 | |
| 2609 | static inline int stl_getbrdnr(void) |
| 2610 | { |
| 2611 | int i; |
| 2612 | |
| 2613 | for (i = 0; (i < STL_MAXBRDS); i++) { |
| 2614 | if (stl_brds[i] == (stlbrd_t *) NULL) { |
| 2615 | if (i >= stl_nrbrds) |
| 2616 | stl_nrbrds = i + 1; |
| 2617 | return(i); |
| 2618 | } |
| 2619 | } |
| 2620 | return(-1); |
| 2621 | } |
| 2622 | |
| 2623 | /*****************************************************************************/ |
| 2624 | |
| 2625 | #ifdef CONFIG_PCI |
| 2626 | |
| 2627 | /* |
| 2628 | * We have a Stallion board. Allocate a board structure and |
| 2629 | * initialize it. Read its IO and IRQ resources from PCI |
| 2630 | * configuration space. |
| 2631 | */ |
| 2632 | |
| 2633 | static inline int stl_initpcibrd(int brdtype, struct pci_dev *devp) |
| 2634 | { |
| 2635 | stlbrd_t *brdp; |
| 2636 | |
| 2637 | #ifdef DEBUG |
| 2638 | printk("stl_initpcibrd(brdtype=%d,busnr=%x,devnr=%x)\n", brdtype, |
| 2639 | devp->bus->number, devp->devfn); |
| 2640 | #endif |
| 2641 | |
| 2642 | if (pci_enable_device(devp)) |
| 2643 | return(-EIO); |
| 2644 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) |
| 2645 | return(-ENOMEM); |
| 2646 | if ((brdp->brdnr = stl_getbrdnr()) < 0) { |
| 2647 | printk("STALLION: too many boards found, " |
| 2648 | "maximum supported %d\n", STL_MAXBRDS); |
| 2649 | return(0); |
| 2650 | } |
| 2651 | brdp->brdtype = brdtype; |
| 2652 | |
| 2653 | /* |
| 2654 | * Different Stallion boards use the BAR registers in different ways, |
| 2655 | * so set up io addresses based on board type. |
| 2656 | */ |
| 2657 | #ifdef DEBUG |
| 2658 | printk("%s(%d): BAR[]=%x,%x,%x,%x IRQ=%x\n", __FILE__, __LINE__, |
| 2659 | pci_resource_start(devp, 0), pci_resource_start(devp, 1), |
| 2660 | pci_resource_start(devp, 2), pci_resource_start(devp, 3), devp->irq); |
| 2661 | #endif |
| 2662 | |
| 2663 | /* |
| 2664 | * We have all resources from the board, so let's setup the actual |
| 2665 | * board structure now. |
| 2666 | */ |
| 2667 | switch (brdtype) { |
| 2668 | case BRD_ECHPCI: |
| 2669 | brdp->ioaddr2 = pci_resource_start(devp, 0); |
| 2670 | brdp->ioaddr1 = pci_resource_start(devp, 1); |
| 2671 | break; |
| 2672 | case BRD_ECH64PCI: |
| 2673 | brdp->ioaddr2 = pci_resource_start(devp, 2); |
| 2674 | brdp->ioaddr1 = pci_resource_start(devp, 1); |
| 2675 | break; |
| 2676 | case BRD_EASYIOPCI: |
| 2677 | brdp->ioaddr1 = pci_resource_start(devp, 2); |
| 2678 | brdp->ioaddr2 = pci_resource_start(devp, 1); |
| 2679 | break; |
| 2680 | default: |
| 2681 | printk("STALLION: unknown PCI board type=%d\n", brdtype); |
| 2682 | break; |
| 2683 | } |
| 2684 | |
| 2685 | brdp->irq = devp->irq; |
| 2686 | stl_brdinit(brdp); |
| 2687 | |
| 2688 | return(0); |
| 2689 | } |
| 2690 | |
| 2691 | /*****************************************************************************/ |
| 2692 | |
| 2693 | /* |
| 2694 | * Find all Stallion PCI boards that might be installed. Initialize each |
| 2695 | * one as it is found. |
| 2696 | */ |
| 2697 | |
| 2698 | |
| 2699 | static inline int stl_findpcibrds(void) |
| 2700 | { |
| 2701 | struct pci_dev *dev = NULL; |
| 2702 | int i, rc; |
| 2703 | |
| 2704 | #ifdef DEBUG |
| 2705 | printk("stl_findpcibrds()\n"); |
| 2706 | #endif |
| 2707 | |
| 2708 | for (i = 0; (i < stl_nrpcibrds); i++) |
| 2709 | while ((dev = pci_find_device(stl_pcibrds[i].vendid, |
| 2710 | stl_pcibrds[i].devid, dev))) { |
| 2711 | |
| 2712 | /* |
| 2713 | * Found a device on the PCI bus that has our vendor and |
| 2714 | * device ID. Need to check now that it is really us. |
| 2715 | */ |
| 2716 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) |
| 2717 | continue; |
| 2718 | |
| 2719 | rc = stl_initpcibrd(stl_pcibrds[i].brdtype, dev); |
| 2720 | if (rc) |
| 2721 | return(rc); |
| 2722 | } |
| 2723 | |
| 2724 | return(0); |
| 2725 | } |
| 2726 | |
| 2727 | #endif |
| 2728 | |
| 2729 | /*****************************************************************************/ |
| 2730 | |
| 2731 | /* |
| 2732 | * Scan through all the boards in the configuration and see what we |
| 2733 | * can find. Handle EIO and the ECH boards a little differently here |
| 2734 | * since the initial search and setup is too different. |
| 2735 | */ |
| 2736 | |
| 2737 | static inline int stl_initbrds(void) |
| 2738 | { |
| 2739 | stlbrd_t *brdp; |
| 2740 | stlconf_t *confp; |
| 2741 | int i; |
| 2742 | |
| 2743 | #ifdef DEBUG |
| 2744 | printk("stl_initbrds()\n"); |
| 2745 | #endif |
| 2746 | |
| 2747 | if (stl_nrbrds > STL_MAXBRDS) { |
| 2748 | printk("STALLION: too many boards in configuration table, " |
| 2749 | "truncating to %d\n", STL_MAXBRDS); |
| 2750 | stl_nrbrds = STL_MAXBRDS; |
| 2751 | } |
| 2752 | |
| 2753 | /* |
| 2754 | * Firstly scan the list of static boards configured. Allocate |
| 2755 | * resources and initialize the boards as found. |
| 2756 | */ |
| 2757 | for (i = 0; (i < stl_nrbrds); i++) { |
| 2758 | confp = &stl_brdconf[i]; |
| 2759 | stl_parsebrd(confp, stl_brdsp[i]); |
| 2760 | if ((brdp = stl_allocbrd()) == (stlbrd_t *) NULL) |
| 2761 | return(-ENOMEM); |
| 2762 | brdp->brdnr = i; |
| 2763 | brdp->brdtype = confp->brdtype; |
| 2764 | brdp->ioaddr1 = confp->ioaddr1; |
| 2765 | brdp->ioaddr2 = confp->ioaddr2; |
| 2766 | brdp->irq = confp->irq; |
| 2767 | brdp->irqtype = confp->irqtype; |
| 2768 | stl_brdinit(brdp); |
| 2769 | } |
| 2770 | |
| 2771 | /* |
| 2772 | * Find any dynamically supported boards. That is via module load |
| 2773 | * line options or auto-detected on the PCI bus. |
| 2774 | */ |
| 2775 | stl_argbrds(); |
| 2776 | #ifdef CONFIG_PCI |
| 2777 | stl_findpcibrds(); |
| 2778 | #endif |
| 2779 | |
| 2780 | return(0); |
| 2781 | } |
| 2782 | |
| 2783 | /*****************************************************************************/ |
| 2784 | |
| 2785 | /* |
| 2786 | * Return the board stats structure to user app. |
| 2787 | */ |
| 2788 | |
| 2789 | static int stl_getbrdstats(combrd_t __user *bp) |
| 2790 | { |
| 2791 | stlbrd_t *brdp; |
| 2792 | stlpanel_t *panelp; |
| 2793 | int i; |
| 2794 | |
| 2795 | if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t))) |
| 2796 | return -EFAULT; |
| 2797 | if (stl_brdstats.brd >= STL_MAXBRDS) |
| 2798 | return(-ENODEV); |
| 2799 | brdp = stl_brds[stl_brdstats.brd]; |
| 2800 | if (brdp == (stlbrd_t *) NULL) |
| 2801 | return(-ENODEV); |
| 2802 | |
| 2803 | memset(&stl_brdstats, 0, sizeof(combrd_t)); |
| 2804 | stl_brdstats.brd = brdp->brdnr; |
| 2805 | stl_brdstats.type = brdp->brdtype; |
| 2806 | stl_brdstats.hwid = brdp->hwid; |
| 2807 | stl_brdstats.state = brdp->state; |
| 2808 | stl_brdstats.ioaddr = brdp->ioaddr1; |
| 2809 | stl_brdstats.ioaddr2 = brdp->ioaddr2; |
| 2810 | stl_brdstats.irq = brdp->irq; |
| 2811 | stl_brdstats.nrpanels = brdp->nrpanels; |
| 2812 | stl_brdstats.nrports = brdp->nrports; |
| 2813 | for (i = 0; (i < brdp->nrpanels); i++) { |
| 2814 | panelp = brdp->panels[i]; |
| 2815 | stl_brdstats.panels[i].panel = i; |
| 2816 | stl_brdstats.panels[i].hwid = panelp->hwid; |
| 2817 | stl_brdstats.panels[i].nrports = panelp->nrports; |
| 2818 | } |
| 2819 | |
| 2820 | return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0; |
| 2821 | } |
| 2822 | |
| 2823 | /*****************************************************************************/ |
| 2824 | |
| 2825 | /* |
| 2826 | * Resolve the referenced port number into a port struct pointer. |
| 2827 | */ |
| 2828 | |
| 2829 | static stlport_t *stl_getport(int brdnr, int panelnr, int portnr) |
| 2830 | { |
| 2831 | stlbrd_t *brdp; |
| 2832 | stlpanel_t *panelp; |
| 2833 | |
| 2834 | if ((brdnr < 0) || (brdnr >= STL_MAXBRDS)) |
| 2835 | return((stlport_t *) NULL); |
| 2836 | brdp = stl_brds[brdnr]; |
| 2837 | if (brdp == (stlbrd_t *) NULL) |
| 2838 | return((stlport_t *) NULL); |
| 2839 | if ((panelnr < 0) || (panelnr >= brdp->nrpanels)) |
| 2840 | return((stlport_t *) NULL); |
| 2841 | panelp = brdp->panels[panelnr]; |
| 2842 | if (panelp == (stlpanel_t *) NULL) |
| 2843 | return((stlport_t *) NULL); |
| 2844 | if ((portnr < 0) || (portnr >= panelp->nrports)) |
| 2845 | return((stlport_t *) NULL); |
| 2846 | return(panelp->ports[portnr]); |
| 2847 | } |
| 2848 | |
| 2849 | /*****************************************************************************/ |
| 2850 | |
| 2851 | /* |
| 2852 | * Return the port stats structure to user app. A NULL port struct |
| 2853 | * pointer passed in means that we need to find out from the app |
| 2854 | * what port to get stats for (used through board control device). |
| 2855 | */ |
| 2856 | |
| 2857 | static int stl_getportstats(stlport_t *portp, comstats_t __user *cp) |
| 2858 | { |
| 2859 | unsigned char *head, *tail; |
| 2860 | unsigned long flags; |
| 2861 | |
| 2862 | if (!portp) { |
| 2863 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| 2864 | return -EFAULT; |
| 2865 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| 2866 | stl_comstats.port); |
| 2867 | if (portp == (stlport_t *) NULL) |
| 2868 | return(-ENODEV); |
| 2869 | } |
| 2870 | |
| 2871 | portp->stats.state = portp->istate; |
| 2872 | portp->stats.flags = portp->flags; |
| 2873 | portp->stats.hwid = portp->hwid; |
| 2874 | |
| 2875 | portp->stats.ttystate = 0; |
| 2876 | portp->stats.cflags = 0; |
| 2877 | portp->stats.iflags = 0; |
| 2878 | portp->stats.oflags = 0; |
| 2879 | portp->stats.lflags = 0; |
| 2880 | portp->stats.rxbuffered = 0; |
| 2881 | |
| 2882 | save_flags(flags); |
| 2883 | cli(); |
| 2884 | if (portp->tty != (struct tty_struct *) NULL) { |
| 2885 | if (portp->tty->driver_data == portp) { |
| 2886 | portp->stats.ttystate = portp->tty->flags; |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 2887 | /* No longer available as a statistic */ |
| 2888 | portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2889 | if (portp->tty->termios != (struct termios *) NULL) { |
| 2890 | portp->stats.cflags = portp->tty->termios->c_cflag; |
| 2891 | portp->stats.iflags = portp->tty->termios->c_iflag; |
| 2892 | portp->stats.oflags = portp->tty->termios->c_oflag; |
| 2893 | portp->stats.lflags = portp->tty->termios->c_lflag; |
| 2894 | } |
| 2895 | } |
| 2896 | } |
| 2897 | restore_flags(flags); |
| 2898 | |
| 2899 | head = portp->tx.head; |
| 2900 | tail = portp->tx.tail; |
| 2901 | portp->stats.txbuffered = ((head >= tail) ? (head - tail) : |
| 2902 | (STL_TXBUFSIZE - (tail - head))); |
| 2903 | |
| 2904 | portp->stats.signals = (unsigned long) stl_getsignals(portp); |
| 2905 | |
| 2906 | return copy_to_user(cp, &portp->stats, |
| 2907 | sizeof(comstats_t)) ? -EFAULT : 0; |
| 2908 | } |
| 2909 | |
| 2910 | /*****************************************************************************/ |
| 2911 | |
| 2912 | /* |
| 2913 | * Clear the port stats structure. We also return it zeroed out... |
| 2914 | */ |
| 2915 | |
| 2916 | static int stl_clrportstats(stlport_t *portp, comstats_t __user *cp) |
| 2917 | { |
| 2918 | if (!portp) { |
| 2919 | if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t))) |
| 2920 | return -EFAULT; |
| 2921 | portp = stl_getport(stl_comstats.brd, stl_comstats.panel, |
| 2922 | stl_comstats.port); |
| 2923 | if (portp == (stlport_t *) NULL) |
| 2924 | return(-ENODEV); |
| 2925 | } |
| 2926 | |
| 2927 | memset(&portp->stats, 0, sizeof(comstats_t)); |
| 2928 | portp->stats.brd = portp->brdnr; |
| 2929 | portp->stats.panel = portp->panelnr; |
| 2930 | portp->stats.port = portp->portnr; |
| 2931 | return copy_to_user(cp, &portp->stats, |
| 2932 | sizeof(comstats_t)) ? -EFAULT : 0; |
| 2933 | } |
| 2934 | |
| 2935 | /*****************************************************************************/ |
| 2936 | |
| 2937 | /* |
| 2938 | * Return the entire driver ports structure to a user app. |
| 2939 | */ |
| 2940 | |
| 2941 | static int stl_getportstruct(stlport_t __user *arg) |
| 2942 | { |
| 2943 | stlport_t *portp; |
| 2944 | |
| 2945 | if (copy_from_user(&stl_dummyport, arg, sizeof(stlport_t))) |
| 2946 | return -EFAULT; |
| 2947 | portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr, |
| 2948 | stl_dummyport.portnr); |
| 2949 | if (!portp) |
| 2950 | return -ENODEV; |
| 2951 | return copy_to_user(arg, portp, sizeof(stlport_t)) ? -EFAULT : 0; |
| 2952 | } |
| 2953 | |
| 2954 | /*****************************************************************************/ |
| 2955 | |
| 2956 | /* |
| 2957 | * Return the entire driver board structure to a user app. |
| 2958 | */ |
| 2959 | |
| 2960 | static int stl_getbrdstruct(stlbrd_t __user *arg) |
| 2961 | { |
| 2962 | stlbrd_t *brdp; |
| 2963 | |
| 2964 | if (copy_from_user(&stl_dummybrd, arg, sizeof(stlbrd_t))) |
| 2965 | return -EFAULT; |
| 2966 | if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS)) |
| 2967 | return -ENODEV; |
| 2968 | brdp = stl_brds[stl_dummybrd.brdnr]; |
| 2969 | if (!brdp) |
| 2970 | return(-ENODEV); |
| 2971 | return copy_to_user(arg, brdp, sizeof(stlbrd_t)) ? -EFAULT : 0; |
| 2972 | } |
| 2973 | |
| 2974 | /*****************************************************************************/ |
| 2975 | |
| 2976 | /* |
| 2977 | * The "staliomem" device is also required to do some special operations |
| 2978 | * on the board and/or ports. In this driver it is mostly used for stats |
| 2979 | * collection. |
| 2980 | */ |
| 2981 | |
| 2982 | static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg) |
| 2983 | { |
| 2984 | int brdnr, rc; |
| 2985 | void __user *argp = (void __user *)arg; |
| 2986 | |
| 2987 | #ifdef DEBUG |
| 2988 | printk("stl_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip, |
| 2989 | (int) fp, cmd, (int) arg); |
| 2990 | #endif |
| 2991 | |
| 2992 | brdnr = iminor(ip); |
| 2993 | if (brdnr >= STL_MAXBRDS) |
| 2994 | return(-ENODEV); |
| 2995 | rc = 0; |
| 2996 | |
| 2997 | switch (cmd) { |
| 2998 | case COM_GETPORTSTATS: |
| 2999 | rc = stl_getportstats(NULL, argp); |
| 3000 | break; |
| 3001 | case COM_CLRPORTSTATS: |
| 3002 | rc = stl_clrportstats(NULL, argp); |
| 3003 | break; |
| 3004 | case COM_GETBRDSTATS: |
| 3005 | rc = stl_getbrdstats(argp); |
| 3006 | break; |
| 3007 | case COM_READPORT: |
| 3008 | rc = stl_getportstruct(argp); |
| 3009 | break; |
| 3010 | case COM_READBOARD: |
| 3011 | rc = stl_getbrdstruct(argp); |
| 3012 | break; |
| 3013 | default: |
| 3014 | rc = -ENOIOCTLCMD; |
| 3015 | break; |
| 3016 | } |
| 3017 | |
| 3018 | return(rc); |
| 3019 | } |
| 3020 | |
| 3021 | static struct tty_operations stl_ops = { |
| 3022 | .open = stl_open, |
| 3023 | .close = stl_close, |
| 3024 | .write = stl_write, |
| 3025 | .put_char = stl_putchar, |
| 3026 | .flush_chars = stl_flushchars, |
| 3027 | .write_room = stl_writeroom, |
| 3028 | .chars_in_buffer = stl_charsinbuffer, |
| 3029 | .ioctl = stl_ioctl, |
| 3030 | .set_termios = stl_settermios, |
| 3031 | .throttle = stl_throttle, |
| 3032 | .unthrottle = stl_unthrottle, |
| 3033 | .stop = stl_stop, |
| 3034 | .start = stl_start, |
| 3035 | .hangup = stl_hangup, |
| 3036 | .flush_buffer = stl_flushbuffer, |
| 3037 | .break_ctl = stl_breakctl, |
| 3038 | .wait_until_sent = stl_waituntilsent, |
| 3039 | .send_xchar = stl_sendxchar, |
| 3040 | .read_proc = stl_readproc, |
| 3041 | .tiocmget = stl_tiocmget, |
| 3042 | .tiocmset = stl_tiocmset, |
| 3043 | }; |
| 3044 | |
| 3045 | /*****************************************************************************/ |
| 3046 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 3047 | static int __init stl_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3048 | { |
| 3049 | int i; |
| 3050 | printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion); |
| 3051 | |
| 3052 | stl_initbrds(); |
| 3053 | |
| 3054 | stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS); |
| 3055 | if (!stl_serial) |
| 3056 | return -1; |
| 3057 | |
| 3058 | /* |
| 3059 | * Allocate a temporary write buffer. |
| 3060 | */ |
Tobias Klauser | b0b4ed7 | 2006-03-31 02:30:56 -0800 | [diff] [blame^] | 3061 | stl_tmpwritebuf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL); |
| 3062 | if (!stl_tmpwritebuf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3063 | printk("STALLION: failed to allocate memory (size=%d)\n", |
| 3064 | STL_TXBUFSIZE); |
| 3065 | |
| 3066 | /* |
| 3067 | * Set up a character driver for per board stuff. This is mainly used |
| 3068 | * to do stats ioctls on the ports. |
| 3069 | */ |
| 3070 | if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem)) |
| 3071 | printk("STALLION: failed to register serial board device\n"); |
| 3072 | devfs_mk_dir("staliomem"); |
| 3073 | |
gregkh@suse.de | ca8eca6 | 2005-03-23 09:53:09 -0800 | [diff] [blame] | 3074 | stallion_class = class_create(THIS_MODULE, "staliomem"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3075 | for (i = 0; i < 4; i++) { |
| 3076 | devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i), |
| 3077 | S_IFCHR|S_IRUSR|S_IWUSR, |
| 3078 | "staliomem/%d", i); |
Greg Kroah-Hartman | 53f4654 | 2005-10-27 22:25:43 -0700 | [diff] [blame] | 3079 | class_device_create(stallion_class, NULL, |
| 3080 | MKDEV(STL_SIOMEMMAJOR, i), NULL, |
| 3081 | "staliomem%d", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3082 | } |
| 3083 | |
| 3084 | stl_serial->owner = THIS_MODULE; |
| 3085 | stl_serial->driver_name = stl_drvname; |
| 3086 | stl_serial->name = "ttyE"; |
| 3087 | stl_serial->devfs_name = "tts/E"; |
| 3088 | stl_serial->major = STL_SERIALMAJOR; |
| 3089 | stl_serial->minor_start = 0; |
| 3090 | stl_serial->type = TTY_DRIVER_TYPE_SERIAL; |
| 3091 | stl_serial->subtype = SERIAL_TYPE_NORMAL; |
| 3092 | stl_serial->init_termios = stl_deftermios; |
| 3093 | stl_serial->flags = TTY_DRIVER_REAL_RAW; |
| 3094 | tty_set_operations(stl_serial, &stl_ops); |
| 3095 | |
| 3096 | if (tty_register_driver(stl_serial)) { |
| 3097 | put_tty_driver(stl_serial); |
| 3098 | printk("STALLION: failed to register serial driver\n"); |
| 3099 | return -1; |
| 3100 | } |
| 3101 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3102 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3103 | } |
| 3104 | |
| 3105 | /*****************************************************************************/ |
| 3106 | /* CD1400 HARDWARE FUNCTIONS */ |
| 3107 | /*****************************************************************************/ |
| 3108 | |
| 3109 | /* |
| 3110 | * These functions get/set/update the registers of the cd1400 UARTs. |
| 3111 | * Access to the cd1400 registers is via an address/data io port pair. |
| 3112 | * (Maybe should make this inline...) |
| 3113 | */ |
| 3114 | |
| 3115 | static int stl_cd1400getreg(stlport_t *portp, int regnr) |
| 3116 | { |
| 3117 | outb((regnr + portp->uartaddr), portp->ioaddr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3118 | return inb(portp->ioaddr + EREG_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3119 | } |
| 3120 | |
| 3121 | static void stl_cd1400setreg(stlport_t *portp, int regnr, int value) |
| 3122 | { |
| 3123 | outb((regnr + portp->uartaddr), portp->ioaddr); |
| 3124 | outb(value, portp->ioaddr + EREG_DATA); |
| 3125 | } |
| 3126 | |
| 3127 | static int stl_cd1400updatereg(stlport_t *portp, int regnr, int value) |
| 3128 | { |
| 3129 | outb((regnr + portp->uartaddr), portp->ioaddr); |
| 3130 | if (inb(portp->ioaddr + EREG_DATA) != value) { |
| 3131 | outb(value, portp->ioaddr + EREG_DATA); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3132 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3133 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3134 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3135 | } |
| 3136 | |
| 3137 | /*****************************************************************************/ |
| 3138 | |
| 3139 | /* |
| 3140 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
| 3141 | * these ports are on - since the port io registers are almost |
| 3142 | * identical when dealing with ports. |
| 3143 | */ |
| 3144 | |
| 3145 | static int stl_cd1400panelinit(stlbrd_t *brdp, stlpanel_t *panelp) |
| 3146 | { |
| 3147 | unsigned int gfrcr; |
| 3148 | int chipmask, i, j; |
| 3149 | int nrchips, uartaddr, ioaddr; |
| 3150 | |
| 3151 | #ifdef DEBUG |
| 3152 | printk("stl_panelinit(brdp=%x,panelp=%x)\n", (int) brdp, (int) panelp); |
| 3153 | #endif |
| 3154 | |
| 3155 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
| 3156 | |
| 3157 | /* |
| 3158 | * Check that each chip is present and started up OK. |
| 3159 | */ |
| 3160 | chipmask = 0; |
| 3161 | nrchips = panelp->nrports / CD1400_PORTS; |
| 3162 | for (i = 0; (i < nrchips); i++) { |
| 3163 | if (brdp->brdtype == BRD_ECHPCI) { |
| 3164 | outb((panelp->pagenr + (i >> 1)), brdp->ioctrl); |
| 3165 | ioaddr = panelp->iobase; |
| 3166 | } else { |
| 3167 | ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1)); |
| 3168 | } |
| 3169 | uartaddr = (i & 0x01) ? 0x080 : 0; |
| 3170 | outb((GFRCR + uartaddr), ioaddr); |
| 3171 | outb(0, (ioaddr + EREG_DATA)); |
| 3172 | outb((CCR + uartaddr), ioaddr); |
| 3173 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| 3174 | outb(CCR_RESETFULL, (ioaddr + EREG_DATA)); |
| 3175 | outb((GFRCR + uartaddr), ioaddr); |
| 3176 | for (j = 0; (j < CCR_MAXWAIT); j++) { |
| 3177 | if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0) |
| 3178 | break; |
| 3179 | } |
| 3180 | if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) { |
| 3181 | printk("STALLION: cd1400 not responding, " |
| 3182 | "brd=%d panel=%d chip=%d\n", |
| 3183 | panelp->brdnr, panelp->panelnr, i); |
| 3184 | continue; |
| 3185 | } |
| 3186 | chipmask |= (0x1 << i); |
| 3187 | outb((PPR + uartaddr), ioaddr); |
| 3188 | outb(PPR_SCALAR, (ioaddr + EREG_DATA)); |
| 3189 | } |
| 3190 | |
| 3191 | BRDDISABLE(panelp->brdnr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3192 | return chipmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3193 | } |
| 3194 | |
| 3195 | /*****************************************************************************/ |
| 3196 | |
| 3197 | /* |
| 3198 | * Initialize hardware specific port registers. |
| 3199 | */ |
| 3200 | |
| 3201 | static void stl_cd1400portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) |
| 3202 | { |
| 3203 | #ifdef DEBUG |
| 3204 | printk("stl_cd1400portinit(brdp=%x,panelp=%x,portp=%x)\n", |
| 3205 | (int) brdp, (int) panelp, (int) portp); |
| 3206 | #endif |
| 3207 | |
| 3208 | if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || |
| 3209 | (portp == (stlport_t *) NULL)) |
| 3210 | return; |
| 3211 | |
| 3212 | portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) || |
| 3213 | (portp->portnr < 8)) ? 0 : EREG_BANKSIZE); |
| 3214 | portp->uartaddr = (portp->portnr & 0x04) << 5; |
| 3215 | portp->pagenr = panelp->pagenr + (portp->portnr >> 3); |
| 3216 | |
| 3217 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3218 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3219 | stl_cd1400setreg(portp, LIVR, (portp->portnr << 3)); |
| 3220 | portp->hwid = stl_cd1400getreg(portp, GFRCR); |
| 3221 | BRDDISABLE(portp->brdnr); |
| 3222 | } |
| 3223 | |
| 3224 | /*****************************************************************************/ |
| 3225 | |
| 3226 | /* |
| 3227 | * Wait for the command register to be ready. We will poll this, |
| 3228 | * since it won't usually take too long to be ready. |
| 3229 | */ |
| 3230 | |
| 3231 | static void stl_cd1400ccrwait(stlport_t *portp) |
| 3232 | { |
| 3233 | int i; |
| 3234 | |
| 3235 | for (i = 0; (i < CCR_MAXWAIT); i++) { |
| 3236 | if (stl_cd1400getreg(portp, CCR) == 0) { |
| 3237 | return; |
| 3238 | } |
| 3239 | } |
| 3240 | |
| 3241 | printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n", |
| 3242 | portp->portnr, portp->panelnr, portp->brdnr); |
| 3243 | } |
| 3244 | |
| 3245 | /*****************************************************************************/ |
| 3246 | |
| 3247 | /* |
| 3248 | * Set up the cd1400 registers for a port based on the termios port |
| 3249 | * settings. |
| 3250 | */ |
| 3251 | |
| 3252 | static void stl_cd1400setport(stlport_t *portp, struct termios *tiosp) |
| 3253 | { |
| 3254 | stlbrd_t *brdp; |
| 3255 | unsigned long flags; |
| 3256 | unsigned int clkdiv, baudrate; |
| 3257 | unsigned char cor1, cor2, cor3; |
| 3258 | unsigned char cor4, cor5, ccr; |
| 3259 | unsigned char srer, sreron, sreroff; |
| 3260 | unsigned char mcor1, mcor2, rtpr; |
| 3261 | unsigned char clk, div; |
| 3262 | |
| 3263 | cor1 = 0; |
| 3264 | cor2 = 0; |
| 3265 | cor3 = 0; |
| 3266 | cor4 = 0; |
| 3267 | cor5 = 0; |
| 3268 | ccr = 0; |
| 3269 | rtpr = 0; |
| 3270 | clk = 0; |
| 3271 | div = 0; |
| 3272 | mcor1 = 0; |
| 3273 | mcor2 = 0; |
| 3274 | sreron = 0; |
| 3275 | sreroff = 0; |
| 3276 | |
| 3277 | brdp = stl_brds[portp->brdnr]; |
| 3278 | if (brdp == (stlbrd_t *) NULL) |
| 3279 | return; |
| 3280 | |
| 3281 | /* |
| 3282 | * Set up the RX char ignore mask with those RX error types we |
| 3283 | * can ignore. We can get the cd1400 to help us out a little here, |
| 3284 | * it will ignore parity errors and breaks for us. |
| 3285 | */ |
| 3286 | portp->rxignoremsk = 0; |
| 3287 | if (tiosp->c_iflag & IGNPAR) { |
| 3288 | portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN); |
| 3289 | cor1 |= COR1_PARIGNORE; |
| 3290 | } |
| 3291 | if (tiosp->c_iflag & IGNBRK) { |
| 3292 | portp->rxignoremsk |= ST_BREAK; |
| 3293 | cor4 |= COR4_IGNBRK; |
| 3294 | } |
| 3295 | |
| 3296 | portp->rxmarkmsk = ST_OVERRUN; |
| 3297 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
| 3298 | portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING); |
| 3299 | if (tiosp->c_iflag & BRKINT) |
| 3300 | portp->rxmarkmsk |= ST_BREAK; |
| 3301 | |
| 3302 | /* |
| 3303 | * Go through the char size, parity and stop bits and set all the |
| 3304 | * option register appropriately. |
| 3305 | */ |
| 3306 | switch (tiosp->c_cflag & CSIZE) { |
| 3307 | case CS5: |
| 3308 | cor1 |= COR1_CHL5; |
| 3309 | break; |
| 3310 | case CS6: |
| 3311 | cor1 |= COR1_CHL6; |
| 3312 | break; |
| 3313 | case CS7: |
| 3314 | cor1 |= COR1_CHL7; |
| 3315 | break; |
| 3316 | default: |
| 3317 | cor1 |= COR1_CHL8; |
| 3318 | break; |
| 3319 | } |
| 3320 | |
| 3321 | if (tiosp->c_cflag & CSTOPB) |
| 3322 | cor1 |= COR1_STOP2; |
| 3323 | else |
| 3324 | cor1 |= COR1_STOP1; |
| 3325 | |
| 3326 | if (tiosp->c_cflag & PARENB) { |
| 3327 | if (tiosp->c_cflag & PARODD) |
| 3328 | cor1 |= (COR1_PARENB | COR1_PARODD); |
| 3329 | else |
| 3330 | cor1 |= (COR1_PARENB | COR1_PAREVEN); |
| 3331 | } else { |
| 3332 | cor1 |= COR1_PARNONE; |
| 3333 | } |
| 3334 | |
| 3335 | /* |
| 3336 | * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing |
| 3337 | * space for hardware flow control and the like. This should be set to |
| 3338 | * VMIN. Also here we will set the RX data timeout to 10ms - this should |
| 3339 | * really be based on VTIME. |
| 3340 | */ |
| 3341 | cor3 |= FIFO_RXTHRESHOLD; |
| 3342 | rtpr = 2; |
| 3343 | |
| 3344 | /* |
| 3345 | * Calculate the baud rate timers. For now we will just assume that |
| 3346 | * the input and output baud are the same. Could have used a baud |
| 3347 | * table here, but this way we can generate virtually any baud rate |
| 3348 | * we like! |
| 3349 | */ |
| 3350 | baudrate = tiosp->c_cflag & CBAUD; |
| 3351 | if (baudrate & CBAUDEX) { |
| 3352 | baudrate &= ~CBAUDEX; |
| 3353 | if ((baudrate < 1) || (baudrate > 4)) |
| 3354 | tiosp->c_cflag &= ~CBAUDEX; |
| 3355 | else |
| 3356 | baudrate += 15; |
| 3357 | } |
| 3358 | baudrate = stl_baudrates[baudrate]; |
| 3359 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
| 3360 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 3361 | baudrate = 57600; |
| 3362 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 3363 | baudrate = 115200; |
| 3364 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 3365 | baudrate = 230400; |
| 3366 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 3367 | baudrate = 460800; |
| 3368 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| 3369 | baudrate = (portp->baud_base / portp->custom_divisor); |
| 3370 | } |
| 3371 | if (baudrate > STL_CD1400MAXBAUD) |
| 3372 | baudrate = STL_CD1400MAXBAUD; |
| 3373 | |
| 3374 | if (baudrate > 0) { |
| 3375 | for (clk = 0; (clk < CD1400_NUMCLKS); clk++) { |
| 3376 | clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate); |
| 3377 | if (clkdiv < 0x100) |
| 3378 | break; |
| 3379 | } |
| 3380 | div = (unsigned char) clkdiv; |
| 3381 | } |
| 3382 | |
| 3383 | /* |
| 3384 | * Check what form of modem signaling is required and set it up. |
| 3385 | */ |
| 3386 | if ((tiosp->c_cflag & CLOCAL) == 0) { |
| 3387 | mcor1 |= MCOR1_DCD; |
| 3388 | mcor2 |= MCOR2_DCD; |
| 3389 | sreron |= SRER_MODEM; |
| 3390 | portp->flags |= ASYNC_CHECK_CD; |
| 3391 | } else { |
| 3392 | portp->flags &= ~ASYNC_CHECK_CD; |
| 3393 | } |
| 3394 | |
| 3395 | /* |
| 3396 | * Setup cd1400 enhanced modes if we can. In particular we want to |
| 3397 | * handle as much of the flow control as possible automatically. As |
| 3398 | * well as saving a few CPU cycles it will also greatly improve flow |
| 3399 | * control reliability. |
| 3400 | */ |
| 3401 | if (tiosp->c_iflag & IXON) { |
| 3402 | cor2 |= COR2_TXIBE; |
| 3403 | cor3 |= COR3_SCD12; |
| 3404 | if (tiosp->c_iflag & IXANY) |
| 3405 | cor2 |= COR2_IXM; |
| 3406 | } |
| 3407 | |
| 3408 | if (tiosp->c_cflag & CRTSCTS) { |
| 3409 | cor2 |= COR2_CTSAE; |
| 3410 | mcor1 |= FIFO_RTSTHRESHOLD; |
| 3411 | } |
| 3412 | |
| 3413 | /* |
| 3414 | * All cd1400 register values calculated so go through and set |
| 3415 | * them all up. |
| 3416 | */ |
| 3417 | |
| 3418 | #ifdef DEBUG |
| 3419 | printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
| 3420 | portp->portnr, portp->panelnr, portp->brdnr); |
| 3421 | printk(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n", |
| 3422 | cor1, cor2, cor3, cor4, cor5); |
| 3423 | printk(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n", |
| 3424 | mcor1, mcor2, rtpr, sreron, sreroff); |
| 3425 | printk(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div); |
| 3426 | printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
| 3427 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| 3428 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
| 3429 | #endif |
| 3430 | |
| 3431 | save_flags(flags); |
| 3432 | cli(); |
| 3433 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3434 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3)); |
| 3435 | srer = stl_cd1400getreg(portp, SRER); |
| 3436 | stl_cd1400setreg(portp, SRER, 0); |
| 3437 | if (stl_cd1400updatereg(portp, COR1, cor1)) |
| 3438 | ccr = 1; |
| 3439 | if (stl_cd1400updatereg(portp, COR2, cor2)) |
| 3440 | ccr = 1; |
| 3441 | if (stl_cd1400updatereg(portp, COR3, cor3)) |
| 3442 | ccr = 1; |
| 3443 | if (ccr) { |
| 3444 | stl_cd1400ccrwait(portp); |
| 3445 | stl_cd1400setreg(portp, CCR, CCR_CORCHANGE); |
| 3446 | } |
| 3447 | stl_cd1400setreg(portp, COR4, cor4); |
| 3448 | stl_cd1400setreg(portp, COR5, cor5); |
| 3449 | stl_cd1400setreg(portp, MCOR1, mcor1); |
| 3450 | stl_cd1400setreg(portp, MCOR2, mcor2); |
| 3451 | if (baudrate > 0) { |
| 3452 | stl_cd1400setreg(portp, TCOR, clk); |
| 3453 | stl_cd1400setreg(portp, TBPR, div); |
| 3454 | stl_cd1400setreg(portp, RCOR, clk); |
| 3455 | stl_cd1400setreg(portp, RBPR, div); |
| 3456 | } |
| 3457 | stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]); |
| 3458 | stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]); |
| 3459 | stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]); |
| 3460 | stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]); |
| 3461 | stl_cd1400setreg(portp, RTPR, rtpr); |
| 3462 | mcor1 = stl_cd1400getreg(portp, MSVR1); |
| 3463 | if (mcor1 & MSVR1_DCD) |
| 3464 | portp->sigs |= TIOCM_CD; |
| 3465 | else |
| 3466 | portp->sigs &= ~TIOCM_CD; |
| 3467 | stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron)); |
| 3468 | BRDDISABLE(portp->brdnr); |
| 3469 | restore_flags(flags); |
| 3470 | } |
| 3471 | |
| 3472 | /*****************************************************************************/ |
| 3473 | |
| 3474 | /* |
| 3475 | * Set the state of the DTR and RTS signals. |
| 3476 | */ |
| 3477 | |
| 3478 | static void stl_cd1400setsignals(stlport_t *portp, int dtr, int rts) |
| 3479 | { |
| 3480 | unsigned char msvr1, msvr2; |
| 3481 | unsigned long flags; |
| 3482 | |
| 3483 | #ifdef DEBUG |
| 3484 | printk("stl_cd1400setsignals(portp=%x,dtr=%d,rts=%d)\n", |
| 3485 | (int) portp, dtr, rts); |
| 3486 | #endif |
| 3487 | |
| 3488 | msvr1 = 0; |
| 3489 | msvr2 = 0; |
| 3490 | if (dtr > 0) |
| 3491 | msvr1 = MSVR1_DTR; |
| 3492 | if (rts > 0) |
| 3493 | msvr2 = MSVR2_RTS; |
| 3494 | |
| 3495 | save_flags(flags); |
| 3496 | cli(); |
| 3497 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3498 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3499 | if (rts >= 0) |
| 3500 | stl_cd1400setreg(portp, MSVR2, msvr2); |
| 3501 | if (dtr >= 0) |
| 3502 | stl_cd1400setreg(portp, MSVR1, msvr1); |
| 3503 | BRDDISABLE(portp->brdnr); |
| 3504 | restore_flags(flags); |
| 3505 | } |
| 3506 | |
| 3507 | /*****************************************************************************/ |
| 3508 | |
| 3509 | /* |
| 3510 | * Return the state of the signals. |
| 3511 | */ |
| 3512 | |
| 3513 | static int stl_cd1400getsignals(stlport_t *portp) |
| 3514 | { |
| 3515 | unsigned char msvr1, msvr2; |
| 3516 | unsigned long flags; |
| 3517 | int sigs; |
| 3518 | |
| 3519 | #ifdef DEBUG |
| 3520 | printk("stl_cd1400getsignals(portp=%x)\n", (int) portp); |
| 3521 | #endif |
| 3522 | |
| 3523 | save_flags(flags); |
| 3524 | cli(); |
| 3525 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3526 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3527 | msvr1 = stl_cd1400getreg(portp, MSVR1); |
| 3528 | msvr2 = stl_cd1400getreg(portp, MSVR2); |
| 3529 | BRDDISABLE(portp->brdnr); |
| 3530 | restore_flags(flags); |
| 3531 | |
| 3532 | sigs = 0; |
| 3533 | sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0; |
| 3534 | sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0; |
| 3535 | sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0; |
| 3536 | sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0; |
| 3537 | #if 0 |
| 3538 | sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0; |
| 3539 | sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0; |
| 3540 | #else |
| 3541 | sigs |= TIOCM_DSR; |
| 3542 | #endif |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3543 | return sigs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3544 | } |
| 3545 | |
| 3546 | /*****************************************************************************/ |
| 3547 | |
| 3548 | /* |
| 3549 | * Enable/Disable the Transmitter and/or Receiver. |
| 3550 | */ |
| 3551 | |
| 3552 | static void stl_cd1400enablerxtx(stlport_t *portp, int rx, int tx) |
| 3553 | { |
| 3554 | unsigned char ccr; |
| 3555 | unsigned long flags; |
| 3556 | |
| 3557 | #ifdef DEBUG |
| 3558 | printk("stl_cd1400enablerxtx(portp=%x,rx=%d,tx=%d)\n", |
| 3559 | (int) portp, rx, tx); |
| 3560 | #endif |
| 3561 | ccr = 0; |
| 3562 | |
| 3563 | if (tx == 0) |
| 3564 | ccr |= CCR_TXDISABLE; |
| 3565 | else if (tx > 0) |
| 3566 | ccr |= CCR_TXENABLE; |
| 3567 | if (rx == 0) |
| 3568 | ccr |= CCR_RXDISABLE; |
| 3569 | else if (rx > 0) |
| 3570 | ccr |= CCR_RXENABLE; |
| 3571 | |
| 3572 | save_flags(flags); |
| 3573 | cli(); |
| 3574 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3575 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3576 | stl_cd1400ccrwait(portp); |
| 3577 | stl_cd1400setreg(portp, CCR, ccr); |
| 3578 | stl_cd1400ccrwait(portp); |
| 3579 | BRDDISABLE(portp->brdnr); |
| 3580 | restore_flags(flags); |
| 3581 | } |
| 3582 | |
| 3583 | /*****************************************************************************/ |
| 3584 | |
| 3585 | /* |
| 3586 | * Start/stop the Transmitter and/or Receiver. |
| 3587 | */ |
| 3588 | |
| 3589 | static void stl_cd1400startrxtx(stlport_t *portp, int rx, int tx) |
| 3590 | { |
| 3591 | unsigned char sreron, sreroff; |
| 3592 | unsigned long flags; |
| 3593 | |
| 3594 | #ifdef DEBUG |
| 3595 | printk("stl_cd1400startrxtx(portp=%x,rx=%d,tx=%d)\n", |
| 3596 | (int) portp, rx, tx); |
| 3597 | #endif |
| 3598 | |
| 3599 | sreron = 0; |
| 3600 | sreroff = 0; |
| 3601 | if (tx == 0) |
| 3602 | sreroff |= (SRER_TXDATA | SRER_TXEMPTY); |
| 3603 | else if (tx == 1) |
| 3604 | sreron |= SRER_TXDATA; |
| 3605 | else if (tx >= 2) |
| 3606 | sreron |= SRER_TXEMPTY; |
| 3607 | if (rx == 0) |
| 3608 | sreroff |= SRER_RXDATA; |
| 3609 | else if (rx > 0) |
| 3610 | sreron |= SRER_RXDATA; |
| 3611 | |
| 3612 | save_flags(flags); |
| 3613 | cli(); |
| 3614 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3615 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3616 | stl_cd1400setreg(portp, SRER, |
| 3617 | ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron)); |
| 3618 | BRDDISABLE(portp->brdnr); |
| 3619 | if (tx > 0) |
| 3620 | set_bit(ASYI_TXBUSY, &portp->istate); |
| 3621 | restore_flags(flags); |
| 3622 | } |
| 3623 | |
| 3624 | /*****************************************************************************/ |
| 3625 | |
| 3626 | /* |
| 3627 | * Disable all interrupts from this port. |
| 3628 | */ |
| 3629 | |
| 3630 | static void stl_cd1400disableintrs(stlport_t *portp) |
| 3631 | { |
| 3632 | unsigned long flags; |
| 3633 | |
| 3634 | #ifdef DEBUG |
| 3635 | printk("stl_cd1400disableintrs(portp=%x)\n", (int) portp); |
| 3636 | #endif |
| 3637 | save_flags(flags); |
| 3638 | cli(); |
| 3639 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3640 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3641 | stl_cd1400setreg(portp, SRER, 0); |
| 3642 | BRDDISABLE(portp->brdnr); |
| 3643 | restore_flags(flags); |
| 3644 | } |
| 3645 | |
| 3646 | /*****************************************************************************/ |
| 3647 | |
| 3648 | static void stl_cd1400sendbreak(stlport_t *portp, int len) |
| 3649 | { |
| 3650 | unsigned long flags; |
| 3651 | |
| 3652 | #ifdef DEBUG |
| 3653 | printk("stl_cd1400sendbreak(portp=%x,len=%d)\n", (int) portp, len); |
| 3654 | #endif |
| 3655 | |
| 3656 | save_flags(flags); |
| 3657 | cli(); |
| 3658 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3659 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3660 | stl_cd1400setreg(portp, SRER, |
| 3661 | ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) | |
| 3662 | SRER_TXEMPTY)); |
| 3663 | BRDDISABLE(portp->brdnr); |
| 3664 | portp->brklen = len; |
| 3665 | if (len == 1) |
| 3666 | portp->stats.txbreaks++; |
| 3667 | restore_flags(flags); |
| 3668 | } |
| 3669 | |
| 3670 | /*****************************************************************************/ |
| 3671 | |
| 3672 | /* |
| 3673 | * Take flow control actions... |
| 3674 | */ |
| 3675 | |
| 3676 | static void stl_cd1400flowctrl(stlport_t *portp, int state) |
| 3677 | { |
| 3678 | struct tty_struct *tty; |
| 3679 | unsigned long flags; |
| 3680 | |
| 3681 | #ifdef DEBUG |
| 3682 | printk("stl_cd1400flowctrl(portp=%x,state=%x)\n", (int) portp, state); |
| 3683 | #endif |
| 3684 | |
| 3685 | if (portp == (stlport_t *) NULL) |
| 3686 | return; |
| 3687 | tty = portp->tty; |
| 3688 | if (tty == (struct tty_struct *) NULL) |
| 3689 | return; |
| 3690 | |
| 3691 | save_flags(flags); |
| 3692 | cli(); |
| 3693 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3694 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3695 | |
| 3696 | if (state) { |
| 3697 | if (tty->termios->c_iflag & IXOFF) { |
| 3698 | stl_cd1400ccrwait(portp); |
| 3699 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| 3700 | portp->stats.rxxon++; |
| 3701 | stl_cd1400ccrwait(portp); |
| 3702 | } |
| 3703 | /* |
| 3704 | * Question: should we return RTS to what it was before? It may |
| 3705 | * have been set by an ioctl... Suppose not, since if you have |
| 3706 | * hardware flow control set then it is pretty silly to go and |
| 3707 | * set the RTS line by hand. |
| 3708 | */ |
| 3709 | if (tty->termios->c_cflag & CRTSCTS) { |
| 3710 | stl_cd1400setreg(portp, MCOR1, |
| 3711 | (stl_cd1400getreg(portp, MCOR1) | |
| 3712 | FIFO_RTSTHRESHOLD)); |
| 3713 | stl_cd1400setreg(portp, MSVR2, MSVR2_RTS); |
| 3714 | portp->stats.rxrtson++; |
| 3715 | } |
| 3716 | } else { |
| 3717 | if (tty->termios->c_iflag & IXOFF) { |
| 3718 | stl_cd1400ccrwait(portp); |
| 3719 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| 3720 | portp->stats.rxxoff++; |
| 3721 | stl_cd1400ccrwait(portp); |
| 3722 | } |
| 3723 | if (tty->termios->c_cflag & CRTSCTS) { |
| 3724 | stl_cd1400setreg(portp, MCOR1, |
| 3725 | (stl_cd1400getreg(portp, MCOR1) & 0xf0)); |
| 3726 | stl_cd1400setreg(portp, MSVR2, 0); |
| 3727 | portp->stats.rxrtsoff++; |
| 3728 | } |
| 3729 | } |
| 3730 | |
| 3731 | BRDDISABLE(portp->brdnr); |
| 3732 | restore_flags(flags); |
| 3733 | } |
| 3734 | |
| 3735 | /*****************************************************************************/ |
| 3736 | |
| 3737 | /* |
| 3738 | * Send a flow control character... |
| 3739 | */ |
| 3740 | |
| 3741 | static void stl_cd1400sendflow(stlport_t *portp, int state) |
| 3742 | { |
| 3743 | struct tty_struct *tty; |
| 3744 | unsigned long flags; |
| 3745 | |
| 3746 | #ifdef DEBUG |
| 3747 | printk("stl_cd1400sendflow(portp=%x,state=%x)\n", (int) portp, state); |
| 3748 | #endif |
| 3749 | |
| 3750 | if (portp == (stlport_t *) NULL) |
| 3751 | return; |
| 3752 | tty = portp->tty; |
| 3753 | if (tty == (struct tty_struct *) NULL) |
| 3754 | return; |
| 3755 | |
| 3756 | save_flags(flags); |
| 3757 | cli(); |
| 3758 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3759 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3760 | if (state) { |
| 3761 | stl_cd1400ccrwait(portp); |
| 3762 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1); |
| 3763 | portp->stats.rxxon++; |
| 3764 | stl_cd1400ccrwait(portp); |
| 3765 | } else { |
| 3766 | stl_cd1400ccrwait(portp); |
| 3767 | stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2); |
| 3768 | portp->stats.rxxoff++; |
| 3769 | stl_cd1400ccrwait(portp); |
| 3770 | } |
| 3771 | BRDDISABLE(portp->brdnr); |
| 3772 | restore_flags(flags); |
| 3773 | } |
| 3774 | |
| 3775 | /*****************************************************************************/ |
| 3776 | |
| 3777 | static void stl_cd1400flush(stlport_t *portp) |
| 3778 | { |
| 3779 | unsigned long flags; |
| 3780 | |
| 3781 | #ifdef DEBUG |
| 3782 | printk("stl_cd1400flush(portp=%x)\n", (int) portp); |
| 3783 | #endif |
| 3784 | |
| 3785 | if (portp == (stlport_t *) NULL) |
| 3786 | return; |
| 3787 | |
| 3788 | save_flags(flags); |
| 3789 | cli(); |
| 3790 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 3791 | stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03)); |
| 3792 | stl_cd1400ccrwait(portp); |
| 3793 | stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO); |
| 3794 | stl_cd1400ccrwait(portp); |
| 3795 | portp->tx.tail = portp->tx.head; |
| 3796 | BRDDISABLE(portp->brdnr); |
| 3797 | restore_flags(flags); |
| 3798 | } |
| 3799 | |
| 3800 | /*****************************************************************************/ |
| 3801 | |
| 3802 | /* |
| 3803 | * Return the current state of data flow on this port. This is only |
| 3804 | * really interresting when determining if data has fully completed |
| 3805 | * transmission or not... This is easy for the cd1400, it accurately |
| 3806 | * maintains the busy port flag. |
| 3807 | */ |
| 3808 | |
| 3809 | static int stl_cd1400datastate(stlport_t *portp) |
| 3810 | { |
| 3811 | #ifdef DEBUG |
| 3812 | printk("stl_cd1400datastate(portp=%x)\n", (int) portp); |
| 3813 | #endif |
| 3814 | |
| 3815 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3816 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3817 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3818 | return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3819 | } |
| 3820 | |
| 3821 | /*****************************************************************************/ |
| 3822 | |
| 3823 | /* |
| 3824 | * Interrupt service routine for cd1400 EasyIO boards. |
| 3825 | */ |
| 3826 | |
| 3827 | static void stl_cd1400eiointr(stlpanel_t *panelp, unsigned int iobase) |
| 3828 | { |
| 3829 | unsigned char svrtype; |
| 3830 | |
| 3831 | #ifdef DEBUG |
| 3832 | printk("stl_cd1400eiointr(panelp=%x,iobase=%x)\n", |
| 3833 | (int) panelp, iobase); |
| 3834 | #endif |
| 3835 | |
| 3836 | outb(SVRR, iobase); |
| 3837 | svrtype = inb(iobase + EREG_DATA); |
| 3838 | if (panelp->nrports > 4) { |
| 3839 | outb((SVRR + 0x80), iobase); |
| 3840 | svrtype |= inb(iobase + EREG_DATA); |
| 3841 | } |
| 3842 | |
| 3843 | if (svrtype & SVRR_RX) |
| 3844 | stl_cd1400rxisr(panelp, iobase); |
| 3845 | else if (svrtype & SVRR_TX) |
| 3846 | stl_cd1400txisr(panelp, iobase); |
| 3847 | else if (svrtype & SVRR_MDM) |
| 3848 | stl_cd1400mdmisr(panelp, iobase); |
| 3849 | } |
| 3850 | |
| 3851 | /*****************************************************************************/ |
| 3852 | |
| 3853 | /* |
| 3854 | * Interrupt service routine for cd1400 panels. |
| 3855 | */ |
| 3856 | |
| 3857 | static void stl_cd1400echintr(stlpanel_t *panelp, unsigned int iobase) |
| 3858 | { |
| 3859 | unsigned char svrtype; |
| 3860 | |
| 3861 | #ifdef DEBUG |
| 3862 | printk("stl_cd1400echintr(panelp=%x,iobase=%x)\n", (int) panelp, |
| 3863 | iobase); |
| 3864 | #endif |
| 3865 | |
| 3866 | outb(SVRR, iobase); |
| 3867 | svrtype = inb(iobase + EREG_DATA); |
| 3868 | outb((SVRR + 0x80), iobase); |
| 3869 | svrtype |= inb(iobase + EREG_DATA); |
| 3870 | if (svrtype & SVRR_RX) |
| 3871 | stl_cd1400rxisr(panelp, iobase); |
| 3872 | else if (svrtype & SVRR_TX) |
| 3873 | stl_cd1400txisr(panelp, iobase); |
| 3874 | else if (svrtype & SVRR_MDM) |
| 3875 | stl_cd1400mdmisr(panelp, iobase); |
| 3876 | } |
| 3877 | |
| 3878 | |
| 3879 | /*****************************************************************************/ |
| 3880 | |
| 3881 | /* |
| 3882 | * Unfortunately we need to handle breaks in the TX data stream, since |
| 3883 | * this is the only way to generate them on the cd1400. |
| 3884 | */ |
| 3885 | |
| 3886 | static inline int stl_cd1400breakisr(stlport_t *portp, int ioaddr) |
| 3887 | { |
| 3888 | if (portp->brklen == 1) { |
| 3889 | outb((COR2 + portp->uartaddr), ioaddr); |
| 3890 | outb((inb(ioaddr + EREG_DATA) | COR2_ETC), |
| 3891 | (ioaddr + EREG_DATA)); |
| 3892 | outb((TDR + portp->uartaddr), ioaddr); |
| 3893 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| 3894 | outb(ETC_STARTBREAK, (ioaddr + EREG_DATA)); |
| 3895 | outb((SRER + portp->uartaddr), ioaddr); |
| 3896 | outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)), |
| 3897 | (ioaddr + EREG_DATA)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3898 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3899 | } else if (portp->brklen > 1) { |
| 3900 | outb((TDR + portp->uartaddr), ioaddr); |
| 3901 | outb(ETC_CMD, (ioaddr + EREG_DATA)); |
| 3902 | outb(ETC_STOPBREAK, (ioaddr + EREG_DATA)); |
| 3903 | portp->brklen = -1; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3904 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3905 | } else { |
| 3906 | outb((COR2 + portp->uartaddr), ioaddr); |
| 3907 | outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC), |
| 3908 | (ioaddr + EREG_DATA)); |
| 3909 | portp->brklen = 0; |
| 3910 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 3911 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3912 | } |
| 3913 | |
| 3914 | /*****************************************************************************/ |
| 3915 | |
| 3916 | /* |
| 3917 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
| 3918 | * chars is pretty simple, stuff as many as possible from the TX buffer |
| 3919 | * into the cd1400 FIFO. Must also handle TX breaks here, since they |
| 3920 | * are embedded as commands in the data stream. Oh no, had to use a goto! |
| 3921 | * This could be optimized more, will do when I get time... |
| 3922 | * In practice it is possible that interrupts are enabled but that the |
| 3923 | * port has been hung up. Need to handle not having any TX buffer here, |
| 3924 | * this is done by using the side effect that head and tail will also |
| 3925 | * be NULL if the buffer has been freed. |
| 3926 | */ |
| 3927 | |
| 3928 | static void stl_cd1400txisr(stlpanel_t *panelp, int ioaddr) |
| 3929 | { |
| 3930 | stlport_t *portp; |
| 3931 | int len, stlen; |
| 3932 | char *head, *tail; |
| 3933 | unsigned char ioack, srer; |
| 3934 | |
| 3935 | #ifdef DEBUG |
| 3936 | printk("stl_cd1400txisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); |
| 3937 | #endif |
| 3938 | |
| 3939 | ioack = inb(ioaddr + EREG_TXACK); |
| 3940 | if (((ioack & panelp->ackmask) != 0) || |
| 3941 | ((ioack & ACK_TYPMASK) != ACK_TYPTX)) { |
| 3942 | printk("STALLION: bad TX interrupt ack value=%x\n", ioack); |
| 3943 | return; |
| 3944 | } |
| 3945 | portp = panelp->ports[(ioack >> 3)]; |
| 3946 | |
| 3947 | /* |
| 3948 | * Unfortunately we need to handle breaks in the data stream, since |
| 3949 | * this is the only way to generate them on the cd1400. Do it now if |
| 3950 | * a break is to be sent. |
| 3951 | */ |
| 3952 | if (portp->brklen != 0) |
| 3953 | if (stl_cd1400breakisr(portp, ioaddr)) |
| 3954 | goto stl_txalldone; |
| 3955 | |
| 3956 | head = portp->tx.head; |
| 3957 | tail = portp->tx.tail; |
| 3958 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 3959 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
| 3960 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| 3961 | set_bit(ASYI_TXLOW, &portp->istate); |
| 3962 | schedule_work(&portp->tqueue); |
| 3963 | } |
| 3964 | |
| 3965 | if (len == 0) { |
| 3966 | outb((SRER + portp->uartaddr), ioaddr); |
| 3967 | srer = inb(ioaddr + EREG_DATA); |
| 3968 | if (srer & SRER_TXDATA) { |
| 3969 | srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY; |
| 3970 | } else { |
| 3971 | srer &= ~(SRER_TXDATA | SRER_TXEMPTY); |
| 3972 | clear_bit(ASYI_TXBUSY, &portp->istate); |
| 3973 | } |
| 3974 | outb(srer, (ioaddr + EREG_DATA)); |
| 3975 | } else { |
| 3976 | len = MIN(len, CD1400_TXFIFOSIZE); |
| 3977 | portp->stats.txtotal += len; |
| 3978 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
| 3979 | outb((TDR + portp->uartaddr), ioaddr); |
| 3980 | outsb((ioaddr + EREG_DATA), tail, stlen); |
| 3981 | len -= stlen; |
| 3982 | tail += stlen; |
| 3983 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 3984 | tail = portp->tx.buf; |
| 3985 | if (len > 0) { |
| 3986 | outsb((ioaddr + EREG_DATA), tail, len); |
| 3987 | tail += len; |
| 3988 | } |
| 3989 | portp->tx.tail = tail; |
| 3990 | } |
| 3991 | |
| 3992 | stl_txalldone: |
| 3993 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 3994 | outb(0, (ioaddr + EREG_DATA)); |
| 3995 | } |
| 3996 | |
| 3997 | /*****************************************************************************/ |
| 3998 | |
| 3999 | /* |
| 4000 | * Receive character interrupt handler. Determine if we have good chars |
| 4001 | * or bad chars and then process appropriately. Good chars are easy |
| 4002 | * just shove the lot into the RX buffer and set all status byte to 0. |
| 4003 | * If a bad RX char then process as required. This routine needs to be |
| 4004 | * fast! In practice it is possible that we get an interrupt on a port |
| 4005 | * that is closed. This can happen on hangups - since they completely |
| 4006 | * shutdown a port not in user context. Need to handle this case. |
| 4007 | */ |
| 4008 | |
| 4009 | static void stl_cd1400rxisr(stlpanel_t *panelp, int ioaddr) |
| 4010 | { |
| 4011 | stlport_t *portp; |
| 4012 | struct tty_struct *tty; |
| 4013 | unsigned int ioack, len, buflen; |
| 4014 | unsigned char status; |
| 4015 | char ch; |
| 4016 | |
| 4017 | #ifdef DEBUG |
| 4018 | printk("stl_cd1400rxisr(panelp=%x,ioaddr=%x)\n", (int) panelp, ioaddr); |
| 4019 | #endif |
| 4020 | |
| 4021 | ioack = inb(ioaddr + EREG_RXACK); |
| 4022 | if ((ioack & panelp->ackmask) != 0) { |
| 4023 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| 4024 | return; |
| 4025 | } |
| 4026 | portp = panelp->ports[(ioack >> 3)]; |
| 4027 | tty = portp->tty; |
| 4028 | |
| 4029 | if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) { |
| 4030 | outb((RDCR + portp->uartaddr), ioaddr); |
| 4031 | len = inb(ioaddr + EREG_DATA); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4032 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4033 | len = MIN(len, sizeof(stl_unwanted)); |
| 4034 | outb((RDSR + portp->uartaddr), ioaddr); |
| 4035 | insb((ioaddr + EREG_DATA), &stl_unwanted[0], len); |
| 4036 | portp->stats.rxlost += len; |
| 4037 | portp->stats.rxtotal += len; |
| 4038 | } else { |
| 4039 | len = MIN(len, buflen); |
| 4040 | if (len > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4041 | unsigned char *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4042 | outb((RDSR + portp->uartaddr), ioaddr); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4043 | tty_prepare_flip_string(tty, &ptr, len); |
| 4044 | insb((ioaddr + EREG_DATA), ptr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4045 | tty_schedule_flip(tty); |
| 4046 | portp->stats.rxtotal += len; |
| 4047 | } |
| 4048 | } |
| 4049 | } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) { |
| 4050 | outb((RDSR + portp->uartaddr), ioaddr); |
| 4051 | status = inb(ioaddr + EREG_DATA); |
| 4052 | ch = inb(ioaddr + EREG_DATA); |
| 4053 | if (status & ST_PARITY) |
| 4054 | portp->stats.rxparity++; |
| 4055 | if (status & ST_FRAMING) |
| 4056 | portp->stats.rxframing++; |
| 4057 | if (status & ST_OVERRUN) |
| 4058 | portp->stats.rxoverrun++; |
| 4059 | if (status & ST_BREAK) |
| 4060 | portp->stats.rxbreaks++; |
| 4061 | if (status & ST_SCHARMASK) { |
| 4062 | if ((status & ST_SCHARMASK) == ST_SCHAR1) |
| 4063 | portp->stats.txxon++; |
| 4064 | if ((status & ST_SCHARMASK) == ST_SCHAR2) |
| 4065 | portp->stats.txxoff++; |
| 4066 | goto stl_rxalldone; |
| 4067 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4068 | if (tty != NULL && (portp->rxignoremsk & status) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4069 | if (portp->rxmarkmsk & status) { |
| 4070 | if (status & ST_BREAK) { |
| 4071 | status = TTY_BREAK; |
| 4072 | if (portp->flags & ASYNC_SAK) { |
| 4073 | do_SAK(tty); |
| 4074 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4075 | } |
| 4076 | } else if (status & ST_PARITY) { |
| 4077 | status = TTY_PARITY; |
| 4078 | } else if (status & ST_FRAMING) { |
| 4079 | status = TTY_FRAME; |
| 4080 | } else if(status & ST_OVERRUN) { |
| 4081 | status = TTY_OVERRUN; |
| 4082 | } else { |
| 4083 | status = 0; |
| 4084 | } |
| 4085 | } else { |
| 4086 | status = 0; |
| 4087 | } |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4088 | tty_insert_flip_char(tty, ch, status); |
| 4089 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4090 | } |
| 4091 | } else { |
| 4092 | printk("STALLION: bad RX interrupt ack value=%x\n", ioack); |
| 4093 | return; |
| 4094 | } |
| 4095 | |
| 4096 | stl_rxalldone: |
| 4097 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 4098 | outb(0, (ioaddr + EREG_DATA)); |
| 4099 | } |
| 4100 | |
| 4101 | /*****************************************************************************/ |
| 4102 | |
| 4103 | /* |
| 4104 | * Modem interrupt handler. The is called when the modem signal line |
| 4105 | * (DCD) has changed state. Leave most of the work to the off-level |
| 4106 | * processing routine. |
| 4107 | */ |
| 4108 | |
| 4109 | static void stl_cd1400mdmisr(stlpanel_t *panelp, int ioaddr) |
| 4110 | { |
| 4111 | stlport_t *portp; |
| 4112 | unsigned int ioack; |
| 4113 | unsigned char misr; |
| 4114 | |
| 4115 | #ifdef DEBUG |
| 4116 | printk("stl_cd1400mdmisr(panelp=%x)\n", (int) panelp); |
| 4117 | #endif |
| 4118 | |
| 4119 | ioack = inb(ioaddr + EREG_MDACK); |
| 4120 | if (((ioack & panelp->ackmask) != 0) || |
| 4121 | ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) { |
| 4122 | printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack); |
| 4123 | return; |
| 4124 | } |
| 4125 | portp = panelp->ports[(ioack >> 3)]; |
| 4126 | |
| 4127 | outb((MISR + portp->uartaddr), ioaddr); |
| 4128 | misr = inb(ioaddr + EREG_DATA); |
| 4129 | if (misr & MISR_DCD) { |
| 4130 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
| 4131 | schedule_work(&portp->tqueue); |
| 4132 | portp->stats.modem++; |
| 4133 | } |
| 4134 | |
| 4135 | outb((EOSRR + portp->uartaddr), ioaddr); |
| 4136 | outb(0, (ioaddr + EREG_DATA)); |
| 4137 | } |
| 4138 | |
| 4139 | /*****************************************************************************/ |
| 4140 | /* SC26198 HARDWARE FUNCTIONS */ |
| 4141 | /*****************************************************************************/ |
| 4142 | |
| 4143 | /* |
| 4144 | * These functions get/set/update the registers of the sc26198 UARTs. |
| 4145 | * Access to the sc26198 registers is via an address/data io port pair. |
| 4146 | * (Maybe should make this inline...) |
| 4147 | */ |
| 4148 | |
| 4149 | static int stl_sc26198getreg(stlport_t *portp, int regnr) |
| 4150 | { |
| 4151 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4152 | return inb(portp->ioaddr + XP_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4153 | } |
| 4154 | |
| 4155 | static void stl_sc26198setreg(stlport_t *portp, int regnr, int value) |
| 4156 | { |
| 4157 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| 4158 | outb(value, (portp->ioaddr + XP_DATA)); |
| 4159 | } |
| 4160 | |
| 4161 | static int stl_sc26198updatereg(stlport_t *portp, int regnr, int value) |
| 4162 | { |
| 4163 | outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR)); |
| 4164 | if (inb(portp->ioaddr + XP_DATA) != value) { |
| 4165 | outb(value, (portp->ioaddr + XP_DATA)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4166 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4167 | } |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4168 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4169 | } |
| 4170 | |
| 4171 | /*****************************************************************************/ |
| 4172 | |
| 4173 | /* |
| 4174 | * Functions to get and set the sc26198 global registers. |
| 4175 | */ |
| 4176 | |
| 4177 | static int stl_sc26198getglobreg(stlport_t *portp, int regnr) |
| 4178 | { |
| 4179 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4180 | return inb(portp->ioaddr + XP_DATA); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4181 | } |
| 4182 | |
| 4183 | #if 0 |
| 4184 | static void stl_sc26198setglobreg(stlport_t *portp, int regnr, int value) |
| 4185 | { |
| 4186 | outb(regnr, (portp->ioaddr + XP_ADDR)); |
| 4187 | outb(value, (portp->ioaddr + XP_DATA)); |
| 4188 | } |
| 4189 | #endif |
| 4190 | |
| 4191 | /*****************************************************************************/ |
| 4192 | |
| 4193 | /* |
| 4194 | * Inbitialize the UARTs in a panel. We don't care what sort of board |
| 4195 | * these ports are on - since the port io registers are almost |
| 4196 | * identical when dealing with ports. |
| 4197 | */ |
| 4198 | |
| 4199 | static int stl_sc26198panelinit(stlbrd_t *brdp, stlpanel_t *panelp) |
| 4200 | { |
| 4201 | int chipmask, i; |
| 4202 | int nrchips, ioaddr; |
| 4203 | |
| 4204 | #ifdef DEBUG |
| 4205 | printk("stl_sc26198panelinit(brdp=%x,panelp=%x)\n", |
| 4206 | (int) brdp, (int) panelp); |
| 4207 | #endif |
| 4208 | |
| 4209 | BRDENABLE(panelp->brdnr, panelp->pagenr); |
| 4210 | |
| 4211 | /* |
| 4212 | * Check that each chip is present and started up OK. |
| 4213 | */ |
| 4214 | chipmask = 0; |
| 4215 | nrchips = (panelp->nrports + 4) / SC26198_PORTS; |
| 4216 | if (brdp->brdtype == BRD_ECHPCI) |
| 4217 | outb(panelp->pagenr, brdp->ioctrl); |
| 4218 | |
| 4219 | for (i = 0; (i < nrchips); i++) { |
| 4220 | ioaddr = panelp->iobase + (i * 4); |
| 4221 | outb(SCCR, (ioaddr + XP_ADDR)); |
| 4222 | outb(CR_RESETALL, (ioaddr + XP_DATA)); |
| 4223 | outb(TSTR, (ioaddr + XP_ADDR)); |
| 4224 | if (inb(ioaddr + XP_DATA) != 0) { |
| 4225 | printk("STALLION: sc26198 not responding, " |
| 4226 | "brd=%d panel=%d chip=%d\n", |
| 4227 | panelp->brdnr, panelp->panelnr, i); |
| 4228 | continue; |
| 4229 | } |
| 4230 | chipmask |= (0x1 << i); |
| 4231 | outb(GCCR, (ioaddr + XP_ADDR)); |
| 4232 | outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA)); |
| 4233 | outb(WDTRCR, (ioaddr + XP_ADDR)); |
| 4234 | outb(0xff, (ioaddr + XP_DATA)); |
| 4235 | } |
| 4236 | |
| 4237 | BRDDISABLE(panelp->brdnr); |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4238 | return chipmask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4239 | } |
| 4240 | |
| 4241 | /*****************************************************************************/ |
| 4242 | |
| 4243 | /* |
| 4244 | * Initialize hardware specific port registers. |
| 4245 | */ |
| 4246 | |
| 4247 | static void stl_sc26198portinit(stlbrd_t *brdp, stlpanel_t *panelp, stlport_t *portp) |
| 4248 | { |
| 4249 | #ifdef DEBUG |
| 4250 | printk("stl_sc26198portinit(brdp=%x,panelp=%x,portp=%x)\n", |
| 4251 | (int) brdp, (int) panelp, (int) portp); |
| 4252 | #endif |
| 4253 | |
| 4254 | if ((brdp == (stlbrd_t *) NULL) || (panelp == (stlpanel_t *) NULL) || |
| 4255 | (portp == (stlport_t *) NULL)) |
| 4256 | return; |
| 4257 | |
| 4258 | portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4); |
| 4259 | portp->uartaddr = (portp->portnr & 0x07) << 4; |
| 4260 | portp->pagenr = panelp->pagenr; |
| 4261 | portp->hwid = 0x1; |
| 4262 | |
| 4263 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4264 | stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS); |
| 4265 | BRDDISABLE(portp->brdnr); |
| 4266 | } |
| 4267 | |
| 4268 | /*****************************************************************************/ |
| 4269 | |
| 4270 | /* |
| 4271 | * Set up the sc26198 registers for a port based on the termios port |
| 4272 | * settings. |
| 4273 | */ |
| 4274 | |
| 4275 | static void stl_sc26198setport(stlport_t *portp, struct termios *tiosp) |
| 4276 | { |
| 4277 | stlbrd_t *brdp; |
| 4278 | unsigned long flags; |
| 4279 | unsigned int baudrate; |
| 4280 | unsigned char mr0, mr1, mr2, clk; |
| 4281 | unsigned char imron, imroff, iopr, ipr; |
| 4282 | |
| 4283 | mr0 = 0; |
| 4284 | mr1 = 0; |
| 4285 | mr2 = 0; |
| 4286 | clk = 0; |
| 4287 | iopr = 0; |
| 4288 | imron = 0; |
| 4289 | imroff = 0; |
| 4290 | |
| 4291 | brdp = stl_brds[portp->brdnr]; |
| 4292 | if (brdp == (stlbrd_t *) NULL) |
| 4293 | return; |
| 4294 | |
| 4295 | /* |
| 4296 | * Set up the RX char ignore mask with those RX error types we |
| 4297 | * can ignore. |
| 4298 | */ |
| 4299 | portp->rxignoremsk = 0; |
| 4300 | if (tiosp->c_iflag & IGNPAR) |
| 4301 | portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING | |
| 4302 | SR_RXOVERRUN); |
| 4303 | if (tiosp->c_iflag & IGNBRK) |
| 4304 | portp->rxignoremsk |= SR_RXBREAK; |
| 4305 | |
| 4306 | portp->rxmarkmsk = SR_RXOVERRUN; |
| 4307 | if (tiosp->c_iflag & (INPCK | PARMRK)) |
| 4308 | portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING); |
| 4309 | if (tiosp->c_iflag & BRKINT) |
| 4310 | portp->rxmarkmsk |= SR_RXBREAK; |
| 4311 | |
| 4312 | /* |
| 4313 | * Go through the char size, parity and stop bits and set all the |
| 4314 | * option register appropriately. |
| 4315 | */ |
| 4316 | switch (tiosp->c_cflag & CSIZE) { |
| 4317 | case CS5: |
| 4318 | mr1 |= MR1_CS5; |
| 4319 | break; |
| 4320 | case CS6: |
| 4321 | mr1 |= MR1_CS6; |
| 4322 | break; |
| 4323 | case CS7: |
| 4324 | mr1 |= MR1_CS7; |
| 4325 | break; |
| 4326 | default: |
| 4327 | mr1 |= MR1_CS8; |
| 4328 | break; |
| 4329 | } |
| 4330 | |
| 4331 | if (tiosp->c_cflag & CSTOPB) |
| 4332 | mr2 |= MR2_STOP2; |
| 4333 | else |
| 4334 | mr2 |= MR2_STOP1; |
| 4335 | |
| 4336 | if (tiosp->c_cflag & PARENB) { |
| 4337 | if (tiosp->c_cflag & PARODD) |
| 4338 | mr1 |= (MR1_PARENB | MR1_PARODD); |
| 4339 | else |
| 4340 | mr1 |= (MR1_PARENB | MR1_PAREVEN); |
| 4341 | } else { |
| 4342 | mr1 |= MR1_PARNONE; |
| 4343 | } |
| 4344 | |
| 4345 | mr1 |= MR1_ERRBLOCK; |
| 4346 | |
| 4347 | /* |
| 4348 | * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing |
| 4349 | * space for hardware flow control and the like. This should be set to |
| 4350 | * VMIN. |
| 4351 | */ |
| 4352 | mr2 |= MR2_RXFIFOHALF; |
| 4353 | |
| 4354 | /* |
| 4355 | * Calculate the baud rate timers. For now we will just assume that |
| 4356 | * the input and output baud are the same. The sc26198 has a fixed |
| 4357 | * baud rate table, so only discrete baud rates possible. |
| 4358 | */ |
| 4359 | baudrate = tiosp->c_cflag & CBAUD; |
| 4360 | if (baudrate & CBAUDEX) { |
| 4361 | baudrate &= ~CBAUDEX; |
| 4362 | if ((baudrate < 1) || (baudrate > 4)) |
| 4363 | tiosp->c_cflag &= ~CBAUDEX; |
| 4364 | else |
| 4365 | baudrate += 15; |
| 4366 | } |
| 4367 | baudrate = stl_baudrates[baudrate]; |
| 4368 | if ((tiosp->c_cflag & CBAUD) == B38400) { |
| 4369 | if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
| 4370 | baudrate = 57600; |
| 4371 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
| 4372 | baudrate = 115200; |
| 4373 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI) |
| 4374 | baudrate = 230400; |
| 4375 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP) |
| 4376 | baudrate = 460800; |
| 4377 | else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST) |
| 4378 | baudrate = (portp->baud_base / portp->custom_divisor); |
| 4379 | } |
| 4380 | if (baudrate > STL_SC26198MAXBAUD) |
| 4381 | baudrate = STL_SC26198MAXBAUD; |
| 4382 | |
| 4383 | if (baudrate > 0) { |
| 4384 | for (clk = 0; (clk < SC26198_NRBAUDS); clk++) { |
| 4385 | if (baudrate <= sc26198_baudtable[clk]) |
| 4386 | break; |
| 4387 | } |
| 4388 | } |
| 4389 | |
| 4390 | /* |
| 4391 | * Check what form of modem signaling is required and set it up. |
| 4392 | */ |
| 4393 | if (tiosp->c_cflag & CLOCAL) { |
| 4394 | portp->flags &= ~ASYNC_CHECK_CD; |
| 4395 | } else { |
| 4396 | iopr |= IOPR_DCDCOS; |
| 4397 | imron |= IR_IOPORT; |
| 4398 | portp->flags |= ASYNC_CHECK_CD; |
| 4399 | } |
| 4400 | |
| 4401 | /* |
| 4402 | * Setup sc26198 enhanced modes if we can. In particular we want to |
| 4403 | * handle as much of the flow control as possible automatically. As |
| 4404 | * well as saving a few CPU cycles it will also greatly improve flow |
| 4405 | * control reliability. |
| 4406 | */ |
| 4407 | if (tiosp->c_iflag & IXON) { |
| 4408 | mr0 |= MR0_SWFTX | MR0_SWFT; |
| 4409 | imron |= IR_XONXOFF; |
| 4410 | } else { |
| 4411 | imroff |= IR_XONXOFF; |
| 4412 | } |
| 4413 | if (tiosp->c_iflag & IXOFF) |
| 4414 | mr0 |= MR0_SWFRX; |
| 4415 | |
| 4416 | if (tiosp->c_cflag & CRTSCTS) { |
| 4417 | mr2 |= MR2_AUTOCTS; |
| 4418 | mr1 |= MR1_AUTORTS; |
| 4419 | } |
| 4420 | |
| 4421 | /* |
| 4422 | * All sc26198 register values calculated so go through and set |
| 4423 | * them all up. |
| 4424 | */ |
| 4425 | |
| 4426 | #ifdef DEBUG |
| 4427 | printk("SETPORT: portnr=%d panelnr=%d brdnr=%d\n", |
| 4428 | portp->portnr, portp->panelnr, portp->brdnr); |
| 4429 | printk(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk); |
| 4430 | printk(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff); |
| 4431 | printk(" schr1=%x schr2=%x schr3=%x schr4=%x\n", |
| 4432 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP], |
| 4433 | tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]); |
| 4434 | #endif |
| 4435 | |
| 4436 | save_flags(flags); |
| 4437 | cli(); |
| 4438 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4439 | stl_sc26198setreg(portp, IMR, 0); |
| 4440 | stl_sc26198updatereg(portp, MR0, mr0); |
| 4441 | stl_sc26198updatereg(portp, MR1, mr1); |
| 4442 | stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK); |
| 4443 | stl_sc26198updatereg(portp, MR2, mr2); |
| 4444 | stl_sc26198updatereg(portp, IOPIOR, |
| 4445 | ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr)); |
| 4446 | |
| 4447 | if (baudrate > 0) { |
| 4448 | stl_sc26198setreg(portp, TXCSR, clk); |
| 4449 | stl_sc26198setreg(portp, RXCSR, clk); |
| 4450 | } |
| 4451 | |
| 4452 | stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]); |
| 4453 | stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]); |
| 4454 | |
| 4455 | ipr = stl_sc26198getreg(portp, IPR); |
| 4456 | if (ipr & IPR_DCD) |
| 4457 | portp->sigs &= ~TIOCM_CD; |
| 4458 | else |
| 4459 | portp->sigs |= TIOCM_CD; |
| 4460 | |
| 4461 | portp->imr = (portp->imr & ~imroff) | imron; |
| 4462 | stl_sc26198setreg(portp, IMR, portp->imr); |
| 4463 | BRDDISABLE(portp->brdnr); |
| 4464 | restore_flags(flags); |
| 4465 | } |
| 4466 | |
| 4467 | /*****************************************************************************/ |
| 4468 | |
| 4469 | /* |
| 4470 | * Set the state of the DTR and RTS signals. |
| 4471 | */ |
| 4472 | |
| 4473 | static void stl_sc26198setsignals(stlport_t *portp, int dtr, int rts) |
| 4474 | { |
| 4475 | unsigned char iopioron, iopioroff; |
| 4476 | unsigned long flags; |
| 4477 | |
| 4478 | #ifdef DEBUG |
| 4479 | printk("stl_sc26198setsignals(portp=%x,dtr=%d,rts=%d)\n", |
| 4480 | (int) portp, dtr, rts); |
| 4481 | #endif |
| 4482 | |
| 4483 | iopioron = 0; |
| 4484 | iopioroff = 0; |
| 4485 | if (dtr == 0) |
| 4486 | iopioroff |= IPR_DTR; |
| 4487 | else if (dtr > 0) |
| 4488 | iopioron |= IPR_DTR; |
| 4489 | if (rts == 0) |
| 4490 | iopioroff |= IPR_RTS; |
| 4491 | else if (rts > 0) |
| 4492 | iopioron |= IPR_RTS; |
| 4493 | |
| 4494 | save_flags(flags); |
| 4495 | cli(); |
| 4496 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4497 | stl_sc26198setreg(portp, IOPIOR, |
| 4498 | ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron)); |
| 4499 | BRDDISABLE(portp->brdnr); |
| 4500 | restore_flags(flags); |
| 4501 | } |
| 4502 | |
| 4503 | /*****************************************************************************/ |
| 4504 | |
| 4505 | /* |
| 4506 | * Return the state of the signals. |
| 4507 | */ |
| 4508 | |
| 4509 | static int stl_sc26198getsignals(stlport_t *portp) |
| 4510 | { |
| 4511 | unsigned char ipr; |
| 4512 | unsigned long flags; |
| 4513 | int sigs; |
| 4514 | |
| 4515 | #ifdef DEBUG |
| 4516 | printk("stl_sc26198getsignals(portp=%x)\n", (int) portp); |
| 4517 | #endif |
| 4518 | |
| 4519 | save_flags(flags); |
| 4520 | cli(); |
| 4521 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4522 | ipr = stl_sc26198getreg(portp, IPR); |
| 4523 | BRDDISABLE(portp->brdnr); |
| 4524 | restore_flags(flags); |
| 4525 | |
| 4526 | sigs = 0; |
| 4527 | sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD; |
| 4528 | sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS; |
| 4529 | sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR; |
| 4530 | sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS; |
| 4531 | sigs |= TIOCM_DSR; |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4532 | return sigs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4533 | } |
| 4534 | |
| 4535 | /*****************************************************************************/ |
| 4536 | |
| 4537 | /* |
| 4538 | * Enable/Disable the Transmitter and/or Receiver. |
| 4539 | */ |
| 4540 | |
| 4541 | static void stl_sc26198enablerxtx(stlport_t *portp, int rx, int tx) |
| 4542 | { |
| 4543 | unsigned char ccr; |
| 4544 | unsigned long flags; |
| 4545 | |
| 4546 | #ifdef DEBUG |
| 4547 | printk("stl_sc26198enablerxtx(portp=%x,rx=%d,tx=%d)\n", |
| 4548 | (int) portp, rx, tx); |
| 4549 | #endif |
| 4550 | |
| 4551 | ccr = portp->crenable; |
| 4552 | if (tx == 0) |
| 4553 | ccr &= ~CR_TXENABLE; |
| 4554 | else if (tx > 0) |
| 4555 | ccr |= CR_TXENABLE; |
| 4556 | if (rx == 0) |
| 4557 | ccr &= ~CR_RXENABLE; |
| 4558 | else if (rx > 0) |
| 4559 | ccr |= CR_RXENABLE; |
| 4560 | |
| 4561 | save_flags(flags); |
| 4562 | cli(); |
| 4563 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4564 | stl_sc26198setreg(portp, SCCR, ccr); |
| 4565 | BRDDISABLE(portp->brdnr); |
| 4566 | portp->crenable = ccr; |
| 4567 | restore_flags(flags); |
| 4568 | } |
| 4569 | |
| 4570 | /*****************************************************************************/ |
| 4571 | |
| 4572 | /* |
| 4573 | * Start/stop the Transmitter and/or Receiver. |
| 4574 | */ |
| 4575 | |
| 4576 | static void stl_sc26198startrxtx(stlport_t *portp, int rx, int tx) |
| 4577 | { |
| 4578 | unsigned char imr; |
| 4579 | unsigned long flags; |
| 4580 | |
| 4581 | #ifdef DEBUG |
| 4582 | printk("stl_sc26198startrxtx(portp=%x,rx=%d,tx=%d)\n", |
| 4583 | (int) portp, rx, tx); |
| 4584 | #endif |
| 4585 | |
| 4586 | imr = portp->imr; |
| 4587 | if (tx == 0) |
| 4588 | imr &= ~IR_TXRDY; |
| 4589 | else if (tx == 1) |
| 4590 | imr |= IR_TXRDY; |
| 4591 | if (rx == 0) |
| 4592 | imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG); |
| 4593 | else if (rx > 0) |
| 4594 | imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG; |
| 4595 | |
| 4596 | save_flags(flags); |
| 4597 | cli(); |
| 4598 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4599 | stl_sc26198setreg(portp, IMR, imr); |
| 4600 | BRDDISABLE(portp->brdnr); |
| 4601 | portp->imr = imr; |
| 4602 | if (tx > 0) |
| 4603 | set_bit(ASYI_TXBUSY, &portp->istate); |
| 4604 | restore_flags(flags); |
| 4605 | } |
| 4606 | |
| 4607 | /*****************************************************************************/ |
| 4608 | |
| 4609 | /* |
| 4610 | * Disable all interrupts from this port. |
| 4611 | */ |
| 4612 | |
| 4613 | static void stl_sc26198disableintrs(stlport_t *portp) |
| 4614 | { |
| 4615 | unsigned long flags; |
| 4616 | |
| 4617 | #ifdef DEBUG |
| 4618 | printk("stl_sc26198disableintrs(portp=%x)\n", (int) portp); |
| 4619 | #endif |
| 4620 | |
| 4621 | save_flags(flags); |
| 4622 | cli(); |
| 4623 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4624 | portp->imr = 0; |
| 4625 | stl_sc26198setreg(portp, IMR, 0); |
| 4626 | BRDDISABLE(portp->brdnr); |
| 4627 | restore_flags(flags); |
| 4628 | } |
| 4629 | |
| 4630 | /*****************************************************************************/ |
| 4631 | |
| 4632 | static void stl_sc26198sendbreak(stlport_t *portp, int len) |
| 4633 | { |
| 4634 | unsigned long flags; |
| 4635 | |
| 4636 | #ifdef DEBUG |
| 4637 | printk("stl_sc26198sendbreak(portp=%x,len=%d)\n", (int) portp, len); |
| 4638 | #endif |
| 4639 | |
| 4640 | save_flags(flags); |
| 4641 | cli(); |
| 4642 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4643 | if (len == 1) { |
| 4644 | stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK); |
| 4645 | portp->stats.txbreaks++; |
| 4646 | } else { |
| 4647 | stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK); |
| 4648 | } |
| 4649 | BRDDISABLE(portp->brdnr); |
| 4650 | restore_flags(flags); |
| 4651 | } |
| 4652 | |
| 4653 | /*****************************************************************************/ |
| 4654 | |
| 4655 | /* |
| 4656 | * Take flow control actions... |
| 4657 | */ |
| 4658 | |
| 4659 | static void stl_sc26198flowctrl(stlport_t *portp, int state) |
| 4660 | { |
| 4661 | struct tty_struct *tty; |
| 4662 | unsigned long flags; |
| 4663 | unsigned char mr0; |
| 4664 | |
| 4665 | #ifdef DEBUG |
| 4666 | printk("stl_sc26198flowctrl(portp=%x,state=%x)\n", (int) portp, state); |
| 4667 | #endif |
| 4668 | |
| 4669 | if (portp == (stlport_t *) NULL) |
| 4670 | return; |
| 4671 | tty = portp->tty; |
| 4672 | if (tty == (struct tty_struct *) NULL) |
| 4673 | return; |
| 4674 | |
| 4675 | save_flags(flags); |
| 4676 | cli(); |
| 4677 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4678 | |
| 4679 | if (state) { |
| 4680 | if (tty->termios->c_iflag & IXOFF) { |
| 4681 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4682 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4683 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| 4684 | mr0 |= MR0_SWFRX; |
| 4685 | portp->stats.rxxon++; |
| 4686 | stl_sc26198wait(portp); |
| 4687 | stl_sc26198setreg(portp, MR0, mr0); |
| 4688 | } |
| 4689 | /* |
| 4690 | * Question: should we return RTS to what it was before? It may |
| 4691 | * have been set by an ioctl... Suppose not, since if you have |
| 4692 | * hardware flow control set then it is pretty silly to go and |
| 4693 | * set the RTS line by hand. |
| 4694 | */ |
| 4695 | if (tty->termios->c_cflag & CRTSCTS) { |
| 4696 | stl_sc26198setreg(portp, MR1, |
| 4697 | (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS)); |
| 4698 | stl_sc26198setreg(portp, IOPIOR, |
| 4699 | (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS)); |
| 4700 | portp->stats.rxrtson++; |
| 4701 | } |
| 4702 | } else { |
| 4703 | if (tty->termios->c_iflag & IXOFF) { |
| 4704 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4705 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4706 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| 4707 | mr0 &= ~MR0_SWFRX; |
| 4708 | portp->stats.rxxoff++; |
| 4709 | stl_sc26198wait(portp); |
| 4710 | stl_sc26198setreg(portp, MR0, mr0); |
| 4711 | } |
| 4712 | if (tty->termios->c_cflag & CRTSCTS) { |
| 4713 | stl_sc26198setreg(portp, MR1, |
| 4714 | (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS)); |
| 4715 | stl_sc26198setreg(portp, IOPIOR, |
| 4716 | (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS)); |
| 4717 | portp->stats.rxrtsoff++; |
| 4718 | } |
| 4719 | } |
| 4720 | |
| 4721 | BRDDISABLE(portp->brdnr); |
| 4722 | restore_flags(flags); |
| 4723 | } |
| 4724 | |
| 4725 | /*****************************************************************************/ |
| 4726 | |
| 4727 | /* |
| 4728 | * Send a flow control character. |
| 4729 | */ |
| 4730 | |
| 4731 | static void stl_sc26198sendflow(stlport_t *portp, int state) |
| 4732 | { |
| 4733 | struct tty_struct *tty; |
| 4734 | unsigned long flags; |
| 4735 | unsigned char mr0; |
| 4736 | |
| 4737 | #ifdef DEBUG |
| 4738 | printk("stl_sc26198sendflow(portp=%x,state=%x)\n", (int) portp, state); |
| 4739 | #endif |
| 4740 | |
| 4741 | if (portp == (stlport_t *) NULL) |
| 4742 | return; |
| 4743 | tty = portp->tty; |
| 4744 | if (tty == (struct tty_struct *) NULL) |
| 4745 | return; |
| 4746 | |
| 4747 | save_flags(flags); |
| 4748 | cli(); |
| 4749 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4750 | if (state) { |
| 4751 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4752 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4753 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXON); |
| 4754 | mr0 |= MR0_SWFRX; |
| 4755 | portp->stats.rxxon++; |
| 4756 | stl_sc26198wait(portp); |
| 4757 | stl_sc26198setreg(portp, MR0, mr0); |
| 4758 | } else { |
| 4759 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4760 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4761 | stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF); |
| 4762 | mr0 &= ~MR0_SWFRX; |
| 4763 | portp->stats.rxxoff++; |
| 4764 | stl_sc26198wait(portp); |
| 4765 | stl_sc26198setreg(portp, MR0, mr0); |
| 4766 | } |
| 4767 | BRDDISABLE(portp->brdnr); |
| 4768 | restore_flags(flags); |
| 4769 | } |
| 4770 | |
| 4771 | /*****************************************************************************/ |
| 4772 | |
| 4773 | static void stl_sc26198flush(stlport_t *portp) |
| 4774 | { |
| 4775 | unsigned long flags; |
| 4776 | |
| 4777 | #ifdef DEBUG |
| 4778 | printk("stl_sc26198flush(portp=%x)\n", (int) portp); |
| 4779 | #endif |
| 4780 | |
| 4781 | if (portp == (stlport_t *) NULL) |
| 4782 | return; |
| 4783 | |
| 4784 | save_flags(flags); |
| 4785 | cli(); |
| 4786 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4787 | stl_sc26198setreg(portp, SCCR, CR_TXRESET); |
| 4788 | stl_sc26198setreg(portp, SCCR, portp->crenable); |
| 4789 | BRDDISABLE(portp->brdnr); |
| 4790 | portp->tx.tail = portp->tx.head; |
| 4791 | restore_flags(flags); |
| 4792 | } |
| 4793 | |
| 4794 | /*****************************************************************************/ |
| 4795 | |
| 4796 | /* |
| 4797 | * Return the current state of data flow on this port. This is only |
| 4798 | * really interresting when determining if data has fully completed |
| 4799 | * transmission or not... The sc26198 interrupt scheme cannot |
| 4800 | * determine when all data has actually drained, so we need to |
| 4801 | * check the port statusy register to be sure. |
| 4802 | */ |
| 4803 | |
| 4804 | static int stl_sc26198datastate(stlport_t *portp) |
| 4805 | { |
| 4806 | unsigned long flags; |
| 4807 | unsigned char sr; |
| 4808 | |
| 4809 | #ifdef DEBUG |
| 4810 | printk("stl_sc26198datastate(portp=%x)\n", (int) portp); |
| 4811 | #endif |
| 4812 | |
| 4813 | if (portp == (stlport_t *) NULL) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4814 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4815 | if (test_bit(ASYI_TXBUSY, &portp->istate)) |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4816 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4817 | |
| 4818 | save_flags(flags); |
| 4819 | cli(); |
| 4820 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 4821 | sr = stl_sc26198getreg(portp, SR); |
| 4822 | BRDDISABLE(portp->brdnr); |
| 4823 | restore_flags(flags); |
| 4824 | |
Jesper Juhl | 014c254 | 2006-01-15 02:37:08 +0100 | [diff] [blame] | 4825 | return (sr & SR_TXEMPTY) ? 0 : 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4826 | } |
| 4827 | |
| 4828 | /*****************************************************************************/ |
| 4829 | |
| 4830 | /* |
| 4831 | * Delay for a small amount of time, to give the sc26198 a chance |
| 4832 | * to process a command... |
| 4833 | */ |
| 4834 | |
| 4835 | static void stl_sc26198wait(stlport_t *portp) |
| 4836 | { |
| 4837 | int i; |
| 4838 | |
| 4839 | #ifdef DEBUG |
| 4840 | printk("stl_sc26198wait(portp=%x)\n", (int) portp); |
| 4841 | #endif |
| 4842 | |
| 4843 | if (portp == (stlport_t *) NULL) |
| 4844 | return; |
| 4845 | |
| 4846 | for (i = 0; (i < 20); i++) |
| 4847 | stl_sc26198getglobreg(portp, TSTR); |
| 4848 | } |
| 4849 | |
| 4850 | /*****************************************************************************/ |
| 4851 | |
| 4852 | /* |
| 4853 | * If we are TX flow controlled and in IXANY mode then we may |
| 4854 | * need to unflow control here. We gotta do this because of the |
| 4855 | * automatic flow control modes of the sc26198. |
| 4856 | */ |
| 4857 | |
| 4858 | static inline void stl_sc26198txunflow(stlport_t *portp, struct tty_struct *tty) |
| 4859 | { |
| 4860 | unsigned char mr0; |
| 4861 | |
| 4862 | mr0 = stl_sc26198getreg(portp, MR0); |
| 4863 | stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX)); |
| 4864 | stl_sc26198setreg(portp, SCCR, CR_HOSTXON); |
| 4865 | stl_sc26198wait(portp); |
| 4866 | stl_sc26198setreg(portp, MR0, mr0); |
| 4867 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
| 4868 | } |
| 4869 | |
| 4870 | /*****************************************************************************/ |
| 4871 | |
| 4872 | /* |
| 4873 | * Interrupt service routine for sc26198 panels. |
| 4874 | */ |
| 4875 | |
| 4876 | static void stl_sc26198intr(stlpanel_t *panelp, unsigned int iobase) |
| 4877 | { |
| 4878 | stlport_t *portp; |
| 4879 | unsigned int iack; |
| 4880 | |
| 4881 | /* |
| 4882 | * Work around bug in sc26198 chip... Cannot have A6 address |
| 4883 | * line of UART high, else iack will be returned as 0. |
| 4884 | */ |
| 4885 | outb(0, (iobase + 1)); |
| 4886 | |
| 4887 | iack = inb(iobase + XP_IACK); |
| 4888 | portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)]; |
| 4889 | |
| 4890 | if (iack & IVR_RXDATA) |
| 4891 | stl_sc26198rxisr(portp, iack); |
| 4892 | else if (iack & IVR_TXDATA) |
| 4893 | stl_sc26198txisr(portp); |
| 4894 | else |
| 4895 | stl_sc26198otherisr(portp, iack); |
| 4896 | } |
| 4897 | |
| 4898 | /*****************************************************************************/ |
| 4899 | |
| 4900 | /* |
| 4901 | * Transmit interrupt handler. This has gotta be fast! Handling TX |
| 4902 | * chars is pretty simple, stuff as many as possible from the TX buffer |
| 4903 | * into the sc26198 FIFO. |
| 4904 | * In practice it is possible that interrupts are enabled but that the |
| 4905 | * port has been hung up. Need to handle not having any TX buffer here, |
| 4906 | * this is done by using the side effect that head and tail will also |
| 4907 | * be NULL if the buffer has been freed. |
| 4908 | */ |
| 4909 | |
| 4910 | static void stl_sc26198txisr(stlport_t *portp) |
| 4911 | { |
| 4912 | unsigned int ioaddr; |
| 4913 | unsigned char mr0; |
| 4914 | int len, stlen; |
| 4915 | char *head, *tail; |
| 4916 | |
| 4917 | #ifdef DEBUG |
| 4918 | printk("stl_sc26198txisr(portp=%x)\n", (int) portp); |
| 4919 | #endif |
| 4920 | |
| 4921 | ioaddr = portp->ioaddr; |
| 4922 | head = portp->tx.head; |
| 4923 | tail = portp->tx.tail; |
| 4924 | len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head)); |
| 4925 | if ((len == 0) || ((len < STL_TXBUFLOW) && |
| 4926 | (test_bit(ASYI_TXLOW, &portp->istate) == 0))) { |
| 4927 | set_bit(ASYI_TXLOW, &portp->istate); |
| 4928 | schedule_work(&portp->tqueue); |
| 4929 | } |
| 4930 | |
| 4931 | if (len == 0) { |
| 4932 | outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR)); |
| 4933 | mr0 = inb(ioaddr + XP_DATA); |
| 4934 | if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) { |
| 4935 | portp->imr &= ~IR_TXRDY; |
| 4936 | outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR)); |
| 4937 | outb(portp->imr, (ioaddr + XP_DATA)); |
| 4938 | clear_bit(ASYI_TXBUSY, &portp->istate); |
| 4939 | } else { |
| 4940 | mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY); |
| 4941 | outb(mr0, (ioaddr + XP_DATA)); |
| 4942 | } |
| 4943 | } else { |
| 4944 | len = MIN(len, SC26198_TXFIFOSIZE); |
| 4945 | portp->stats.txtotal += len; |
| 4946 | stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail)); |
| 4947 | outb(GTXFIFO, (ioaddr + XP_ADDR)); |
| 4948 | outsb((ioaddr + XP_DATA), tail, stlen); |
| 4949 | len -= stlen; |
| 4950 | tail += stlen; |
| 4951 | if (tail >= (portp->tx.buf + STL_TXBUFSIZE)) |
| 4952 | tail = portp->tx.buf; |
| 4953 | if (len > 0) { |
| 4954 | outsb((ioaddr + XP_DATA), tail, len); |
| 4955 | tail += len; |
| 4956 | } |
| 4957 | portp->tx.tail = tail; |
| 4958 | } |
| 4959 | } |
| 4960 | |
| 4961 | /*****************************************************************************/ |
| 4962 | |
| 4963 | /* |
| 4964 | * Receive character interrupt handler. Determine if we have good chars |
| 4965 | * or bad chars and then process appropriately. Good chars are easy |
| 4966 | * just shove the lot into the RX buffer and set all status byte to 0. |
| 4967 | * If a bad RX char then process as required. This routine needs to be |
| 4968 | * fast! In practice it is possible that we get an interrupt on a port |
| 4969 | * that is closed. This can happen on hangups - since they completely |
| 4970 | * shutdown a port not in user context. Need to handle this case. |
| 4971 | */ |
| 4972 | |
| 4973 | static void stl_sc26198rxisr(stlport_t *portp, unsigned int iack) |
| 4974 | { |
| 4975 | struct tty_struct *tty; |
| 4976 | unsigned int len, buflen, ioaddr; |
| 4977 | |
| 4978 | #ifdef DEBUG |
| 4979 | printk("stl_sc26198rxisr(portp=%x,iack=%x)\n", (int) portp, iack); |
| 4980 | #endif |
| 4981 | |
| 4982 | tty = portp->tty; |
| 4983 | ioaddr = portp->ioaddr; |
| 4984 | outb(GIBCR, (ioaddr + XP_ADDR)); |
| 4985 | len = inb(ioaddr + XP_DATA) + 1; |
| 4986 | |
| 4987 | if ((iack & IVR_TYPEMASK) == IVR_RXDATA) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4988 | if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4989 | len = MIN(len, sizeof(stl_unwanted)); |
| 4990 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
| 4991 | insb((ioaddr + XP_DATA), &stl_unwanted[0], len); |
| 4992 | portp->stats.rxlost += len; |
| 4993 | portp->stats.rxtotal += len; |
| 4994 | } else { |
| 4995 | len = MIN(len, buflen); |
| 4996 | if (len > 0) { |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4997 | unsigned char *ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4998 | outb(GRXFIFO, (ioaddr + XP_ADDR)); |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 4999 | tty_prepare_flip_string(tty, &ptr, len); |
| 5000 | insb((ioaddr + XP_DATA), ptr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5001 | tty_schedule_flip(tty); |
| 5002 | portp->stats.rxtotal += len; |
| 5003 | } |
| 5004 | } |
| 5005 | } else { |
| 5006 | stl_sc26198rxbadchars(portp); |
| 5007 | } |
| 5008 | |
| 5009 | /* |
| 5010 | * If we are TX flow controlled and in IXANY mode then we may need |
| 5011 | * to unflow control here. We gotta do this because of the automatic |
| 5012 | * flow control modes of the sc26198. |
| 5013 | */ |
| 5014 | if (test_bit(ASYI_TXFLOWED, &portp->istate)) { |
| 5015 | if ((tty != (struct tty_struct *) NULL) && |
| 5016 | (tty->termios != (struct termios *) NULL) && |
| 5017 | (tty->termios->c_iflag & IXANY)) { |
| 5018 | stl_sc26198txunflow(portp, tty); |
| 5019 | } |
| 5020 | } |
| 5021 | } |
| 5022 | |
| 5023 | /*****************************************************************************/ |
| 5024 | |
| 5025 | /* |
| 5026 | * Process an RX bad character. |
| 5027 | */ |
| 5028 | |
| 5029 | static inline void stl_sc26198rxbadch(stlport_t *portp, unsigned char status, char ch) |
| 5030 | { |
| 5031 | struct tty_struct *tty; |
| 5032 | unsigned int ioaddr; |
| 5033 | |
| 5034 | tty = portp->tty; |
| 5035 | ioaddr = portp->ioaddr; |
| 5036 | |
| 5037 | if (status & SR_RXPARITY) |
| 5038 | portp->stats.rxparity++; |
| 5039 | if (status & SR_RXFRAMING) |
| 5040 | portp->stats.rxframing++; |
| 5041 | if (status & SR_RXOVERRUN) |
| 5042 | portp->stats.rxoverrun++; |
| 5043 | if (status & SR_RXBREAK) |
| 5044 | portp->stats.rxbreaks++; |
| 5045 | |
| 5046 | if ((tty != (struct tty_struct *) NULL) && |
| 5047 | ((portp->rxignoremsk & status) == 0)) { |
| 5048 | if (portp->rxmarkmsk & status) { |
| 5049 | if (status & SR_RXBREAK) { |
| 5050 | status = TTY_BREAK; |
| 5051 | if (portp->flags & ASYNC_SAK) { |
| 5052 | do_SAK(tty); |
| 5053 | BRDENABLE(portp->brdnr, portp->pagenr); |
| 5054 | } |
| 5055 | } else if (status & SR_RXPARITY) { |
| 5056 | status = TTY_PARITY; |
| 5057 | } else if (status & SR_RXFRAMING) { |
| 5058 | status = TTY_FRAME; |
| 5059 | } else if(status & SR_RXOVERRUN) { |
| 5060 | status = TTY_OVERRUN; |
| 5061 | } else { |
| 5062 | status = 0; |
| 5063 | } |
| 5064 | } else { |
| 5065 | status = 0; |
| 5066 | } |
| 5067 | |
Alan Cox | 33f0f88 | 2006-01-09 20:54:13 -0800 | [diff] [blame] | 5068 | tty_insert_flip_char(tty, ch, status); |
| 5069 | tty_schedule_flip(tty); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5070 | |
| 5071 | if (status == 0) |
| 5072 | portp->stats.rxtotal++; |
| 5073 | } |
| 5074 | } |
| 5075 | |
| 5076 | /*****************************************************************************/ |
| 5077 | |
| 5078 | /* |
| 5079 | * Process all characters in the RX FIFO of the UART. Check all char |
| 5080 | * status bytes as well, and process as required. We need to check |
| 5081 | * all bytes in the FIFO, in case some more enter the FIFO while we |
| 5082 | * are here. To get the exact character error type we need to switch |
| 5083 | * into CHAR error mode (that is why we need to make sure we empty |
| 5084 | * the FIFO). |
| 5085 | */ |
| 5086 | |
| 5087 | static void stl_sc26198rxbadchars(stlport_t *portp) |
| 5088 | { |
| 5089 | unsigned char status, mr1; |
| 5090 | char ch; |
| 5091 | |
| 5092 | /* |
| 5093 | * To get the precise error type for each character we must switch |
| 5094 | * back into CHAR error mode. |
| 5095 | */ |
| 5096 | mr1 = stl_sc26198getreg(portp, MR1); |
| 5097 | stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK)); |
| 5098 | |
| 5099 | while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) { |
| 5100 | stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR); |
| 5101 | ch = stl_sc26198getreg(portp, RXFIFO); |
| 5102 | stl_sc26198rxbadch(portp, status, ch); |
| 5103 | } |
| 5104 | |
| 5105 | /* |
| 5106 | * To get correct interrupt class we must switch back into BLOCK |
| 5107 | * error mode. |
| 5108 | */ |
| 5109 | stl_sc26198setreg(portp, MR1, mr1); |
| 5110 | } |
| 5111 | |
| 5112 | /*****************************************************************************/ |
| 5113 | |
| 5114 | /* |
| 5115 | * Other interrupt handler. This includes modem signals, flow |
| 5116 | * control actions, etc. Most stuff is left to off-level interrupt |
| 5117 | * processing time. |
| 5118 | */ |
| 5119 | |
| 5120 | static void stl_sc26198otherisr(stlport_t *portp, unsigned int iack) |
| 5121 | { |
| 5122 | unsigned char cir, ipr, xisr; |
| 5123 | |
| 5124 | #ifdef DEBUG |
| 5125 | printk("stl_sc26198otherisr(portp=%x,iack=%x)\n", (int) portp, iack); |
| 5126 | #endif |
| 5127 | |
| 5128 | cir = stl_sc26198getglobreg(portp, CIR); |
| 5129 | |
| 5130 | switch (cir & CIR_SUBTYPEMASK) { |
| 5131 | case CIR_SUBCOS: |
| 5132 | ipr = stl_sc26198getreg(portp, IPR); |
| 5133 | if (ipr & IPR_DCDCHANGE) { |
| 5134 | set_bit(ASYI_DCDCHANGE, &portp->istate); |
| 5135 | schedule_work(&portp->tqueue); |
| 5136 | portp->stats.modem++; |
| 5137 | } |
| 5138 | break; |
| 5139 | case CIR_SUBXONXOFF: |
| 5140 | xisr = stl_sc26198getreg(portp, XISR); |
| 5141 | if (xisr & XISR_RXXONGOT) { |
| 5142 | set_bit(ASYI_TXFLOWED, &portp->istate); |
| 5143 | portp->stats.txxoff++; |
| 5144 | } |
| 5145 | if (xisr & XISR_RXXOFFGOT) { |
| 5146 | clear_bit(ASYI_TXFLOWED, &portp->istate); |
| 5147 | portp->stats.txxon++; |
| 5148 | } |
| 5149 | break; |
| 5150 | case CIR_SUBBREAK: |
| 5151 | stl_sc26198setreg(portp, SCCR, CR_BREAKRESET); |
| 5152 | stl_sc26198rxbadchars(portp); |
| 5153 | break; |
| 5154 | default: |
| 5155 | break; |
| 5156 | } |
| 5157 | } |
| 5158 | |
| 5159 | /*****************************************************************************/ |