Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ISA Plug & Play support |
| 3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| 4 | * |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | * |
| 20 | * Changelog: |
| 21 | * 2000-01-01 Added quirks handling for buggy hardware |
| 22 | * Peter Denison <peterd@pnd-pc.demon.co.uk> |
| 23 | * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev() |
| 24 | * Christoph Hellwig <hch@infradead.org> |
| 25 | * 2001-06-03 Added release_region calls to correspond with |
| 26 | * request_region calls when a failure occurs. Also |
| 27 | * added KERN_* constants to printk() calls. |
| 28 | * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines |
| 29 | * of the pci driver interface |
| 30 | * Kai Germaschewski <kai.germaschewski@gmx.de> |
| 31 | * 2002-06-06 Made the use of dma channel 0 configurable |
| 32 | * Gerald Teschl <gerald.teschl@univie.ac.at> |
| 33 | * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com> |
| 34 | * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com> |
| 35 | */ |
| 36 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/module.h> |
| 38 | #include <linux/kernel.h> |
| 39 | #include <linux/errno.h> |
| 40 | #include <linux/slab.h> |
| 41 | #include <linux/delay.h> |
| 42 | #include <linux/init.h> |
| 43 | #include <linux/isapnp.h> |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 44 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <asm/io.h> |
| 46 | |
| 47 | #if 0 |
| 48 | #define ISAPNP_REGION_OK |
| 49 | #endif |
| 50 | #if 0 |
| 51 | #define ISAPNP_DEBUG |
| 52 | #endif |
| 53 | |
| 54 | int isapnp_disable; /* Disable ISA PnP */ |
| 55 | static int isapnp_rdp; /* Read Data Port */ |
| 56 | static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */ |
| 57 | static int isapnp_verbose = 1; /* verbose mode */ |
| 58 | |
| 59 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); |
| 60 | MODULE_DESCRIPTION("Generic ISA Plug & Play support"); |
| 61 | module_param(isapnp_disable, int, 0); |
| 62 | MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable"); |
| 63 | module_param(isapnp_rdp, int, 0); |
| 64 | MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port"); |
| 65 | module_param(isapnp_reset, int, 0); |
| 66 | MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards"); |
| 67 | module_param(isapnp_verbose, int, 0); |
| 68 | MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode"); |
| 69 | MODULE_LICENSE("GPL"); |
| 70 | |
| 71 | #define _PIDXR 0x279 |
| 72 | #define _PNPWRP 0xa79 |
| 73 | |
| 74 | /* short tags */ |
| 75 | #define _STAG_PNPVERNO 0x01 |
| 76 | #define _STAG_LOGDEVID 0x02 |
| 77 | #define _STAG_COMPATDEVID 0x03 |
| 78 | #define _STAG_IRQ 0x04 |
| 79 | #define _STAG_DMA 0x05 |
| 80 | #define _STAG_STARTDEP 0x06 |
| 81 | #define _STAG_ENDDEP 0x07 |
| 82 | #define _STAG_IOPORT 0x08 |
| 83 | #define _STAG_FIXEDIO 0x09 |
| 84 | #define _STAG_VENDOR 0x0e |
| 85 | #define _STAG_END 0x0f |
| 86 | /* long tags */ |
| 87 | #define _LTAG_MEMRANGE 0x81 |
| 88 | #define _LTAG_ANSISTR 0x82 |
| 89 | #define _LTAG_UNICODESTR 0x83 |
| 90 | #define _LTAG_VENDOR 0x84 |
| 91 | #define _LTAG_MEM32RANGE 0x85 |
| 92 | #define _LTAG_FIXEDMEM32RANGE 0x86 |
| 93 | |
| 94 | static unsigned char isapnp_checksum_value; |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 95 | static DEFINE_MUTEX(isapnp_cfg_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | static int isapnp_detected; |
| 97 | static int isapnp_csn_count; |
| 98 | |
| 99 | /* some prototypes */ |
| 100 | |
| 101 | static inline void write_data(unsigned char x) |
| 102 | { |
| 103 | outb(x, _PNPWRP); |
| 104 | } |
| 105 | |
| 106 | static inline void write_address(unsigned char x) |
| 107 | { |
| 108 | outb(x, _PIDXR); |
| 109 | udelay(20); |
| 110 | } |
| 111 | |
| 112 | static inline unsigned char read_data(void) |
| 113 | { |
| 114 | unsigned char val = inb(isapnp_rdp); |
| 115 | return val; |
| 116 | } |
| 117 | |
| 118 | unsigned char isapnp_read_byte(unsigned char idx) |
| 119 | { |
| 120 | write_address(idx); |
| 121 | return read_data(); |
| 122 | } |
| 123 | |
| 124 | static unsigned short isapnp_read_word(unsigned char idx) |
| 125 | { |
| 126 | unsigned short val; |
| 127 | |
| 128 | val = isapnp_read_byte(idx); |
| 129 | val = (val << 8) + isapnp_read_byte(idx+1); |
| 130 | return val; |
| 131 | } |
| 132 | |
| 133 | void isapnp_write_byte(unsigned char idx, unsigned char val) |
| 134 | { |
| 135 | write_address(idx); |
| 136 | write_data(val); |
| 137 | } |
| 138 | |
| 139 | static void isapnp_write_word(unsigned char idx, unsigned short val) |
| 140 | { |
| 141 | isapnp_write_byte(idx, val >> 8); |
| 142 | isapnp_write_byte(idx+1, val); |
| 143 | } |
| 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | static void isapnp_key(void) |
| 146 | { |
| 147 | unsigned char code = 0x6a, msb; |
| 148 | int i; |
| 149 | |
| 150 | mdelay(1); |
| 151 | write_address(0x00); |
| 152 | write_address(0x00); |
| 153 | |
| 154 | write_address(code); |
| 155 | |
| 156 | for (i = 1; i < 32; i++) { |
| 157 | msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7; |
| 158 | code = (code >> 1) | msb; |
| 159 | write_address(code); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /* place all pnp cards in wait-for-key state */ |
| 164 | static void isapnp_wait(void) |
| 165 | { |
| 166 | isapnp_write_byte(0x02, 0x02); |
| 167 | } |
| 168 | |
| 169 | static void isapnp_wake(unsigned char csn) |
| 170 | { |
| 171 | isapnp_write_byte(0x03, csn); |
| 172 | } |
| 173 | |
| 174 | static void isapnp_device(unsigned char logdev) |
| 175 | { |
| 176 | isapnp_write_byte(0x07, logdev); |
| 177 | } |
| 178 | |
| 179 | static void isapnp_activate(unsigned char logdev) |
| 180 | { |
| 181 | isapnp_device(logdev); |
| 182 | isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1); |
| 183 | udelay(250); |
| 184 | } |
| 185 | |
| 186 | static void isapnp_deactivate(unsigned char logdev) |
| 187 | { |
| 188 | isapnp_device(logdev); |
| 189 | isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0); |
| 190 | udelay(500); |
| 191 | } |
| 192 | |
| 193 | static void __init isapnp_peek(unsigned char *data, int bytes) |
| 194 | { |
| 195 | int i, j; |
| 196 | unsigned char d=0; |
| 197 | |
| 198 | for (i = 1; i <= bytes; i++) { |
| 199 | for (j = 0; j < 20; j++) { |
| 200 | d = isapnp_read_byte(0x05); |
| 201 | if (d & 1) |
| 202 | break; |
| 203 | udelay(100); |
| 204 | } |
| 205 | if (!(d & 1)) { |
| 206 | if (data != NULL) |
| 207 | *data++ = 0xff; |
| 208 | continue; |
| 209 | } |
| 210 | d = isapnp_read_byte(0x04); /* PRESDI */ |
| 211 | isapnp_checksum_value += d; |
| 212 | if (data != NULL) |
| 213 | *data++ = d; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | #define RDP_STEP 32 /* minimum is 4 */ |
| 218 | |
| 219 | static int isapnp_next_rdp(void) |
| 220 | { |
| 221 | int rdp = isapnp_rdp; |
| 222 | static int old_rdp = 0; |
| 223 | |
| 224 | if(old_rdp) |
| 225 | { |
| 226 | release_region(old_rdp, 1); |
| 227 | old_rdp = 0; |
| 228 | } |
| 229 | while (rdp <= 0x3ff) { |
| 230 | /* |
| 231 | * We cannot use NE2000 probe spaces for ISAPnP or we |
| 232 | * will lock up machines. |
| 233 | */ |
| 234 | if ((rdp < 0x280 || rdp > 0x380) && request_region(rdp, 1, "ISAPnP")) |
| 235 | { |
| 236 | isapnp_rdp = rdp; |
| 237 | old_rdp = rdp; |
| 238 | return 0; |
| 239 | } |
| 240 | rdp += RDP_STEP; |
| 241 | } |
| 242 | return -1; |
| 243 | } |
| 244 | |
| 245 | /* Set read port address */ |
| 246 | static inline void isapnp_set_rdp(void) |
| 247 | { |
| 248 | isapnp_write_byte(0x00, isapnp_rdp >> 2); |
| 249 | udelay(100); |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * Perform an isolation. The port selection code now tries to avoid |
| 254 | * "dangerous to read" ports. |
| 255 | */ |
| 256 | |
| 257 | static int __init isapnp_isolate_rdp_select(void) |
| 258 | { |
| 259 | isapnp_wait(); |
| 260 | isapnp_key(); |
| 261 | |
| 262 | /* Control: reset CSN and conditionally everything else too */ |
| 263 | isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04); |
| 264 | mdelay(2); |
| 265 | |
| 266 | isapnp_wait(); |
| 267 | isapnp_key(); |
| 268 | isapnp_wake(0x00); |
| 269 | |
| 270 | if (isapnp_next_rdp() < 0) { |
| 271 | isapnp_wait(); |
| 272 | return -1; |
| 273 | } |
| 274 | |
| 275 | isapnp_set_rdp(); |
| 276 | udelay(1000); |
| 277 | write_address(0x01); |
| 278 | udelay(1000); |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | /* |
| 283 | * Isolate (assign uniqued CSN) to all ISA PnP devices. |
| 284 | */ |
| 285 | |
| 286 | static int __init isapnp_isolate(void) |
| 287 | { |
| 288 | unsigned char checksum = 0x6a; |
| 289 | unsigned char chksum = 0x00; |
| 290 | unsigned char bit = 0x00; |
| 291 | int data; |
| 292 | int csn = 0; |
| 293 | int i; |
| 294 | int iteration = 1; |
| 295 | |
| 296 | isapnp_rdp = 0x213; |
| 297 | if (isapnp_isolate_rdp_select() < 0) |
| 298 | return -1; |
| 299 | |
| 300 | while (1) { |
| 301 | for (i = 1; i <= 64; i++) { |
| 302 | data = read_data() << 8; |
| 303 | udelay(250); |
| 304 | data = data | read_data(); |
| 305 | udelay(250); |
| 306 | if (data == 0x55aa) |
| 307 | bit = 0x01; |
| 308 | checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1); |
| 309 | bit = 0x00; |
| 310 | } |
| 311 | for (i = 65; i <= 72; i++) { |
| 312 | data = read_data() << 8; |
| 313 | udelay(250); |
| 314 | data = data | read_data(); |
| 315 | udelay(250); |
| 316 | if (data == 0x55aa) |
| 317 | chksum |= (1 << (i - 65)); |
| 318 | } |
| 319 | if (checksum != 0x00 && checksum == chksum) { |
| 320 | csn++; |
| 321 | |
| 322 | isapnp_write_byte(0x06, csn); |
| 323 | udelay(250); |
| 324 | iteration++; |
| 325 | isapnp_wake(0x00); |
| 326 | isapnp_set_rdp(); |
| 327 | udelay(1000); |
| 328 | write_address(0x01); |
| 329 | udelay(1000); |
| 330 | goto __next; |
| 331 | } |
| 332 | if (iteration == 1) { |
| 333 | isapnp_rdp += RDP_STEP; |
| 334 | if (isapnp_isolate_rdp_select() < 0) |
| 335 | return -1; |
| 336 | } else if (iteration > 1) { |
| 337 | break; |
| 338 | } |
| 339 | __next: |
| 340 | if (csn == 255) |
| 341 | break; |
| 342 | checksum = 0x6a; |
| 343 | chksum = 0x00; |
| 344 | bit = 0x00; |
| 345 | } |
| 346 | isapnp_wait(); |
| 347 | isapnp_csn_count = csn; |
| 348 | return csn; |
| 349 | } |
| 350 | |
| 351 | /* |
| 352 | * Read one tag from stream. |
| 353 | */ |
| 354 | |
| 355 | static int __init isapnp_read_tag(unsigned char *type, unsigned short *size) |
| 356 | { |
| 357 | unsigned char tag, tmp[2]; |
| 358 | |
| 359 | isapnp_peek(&tag, 1); |
| 360 | if (tag == 0) /* invalid tag */ |
| 361 | return -1; |
| 362 | if (tag & 0x80) { /* large item */ |
| 363 | *type = tag; |
| 364 | isapnp_peek(tmp, 2); |
| 365 | *size = (tmp[1] << 8) | tmp[0]; |
| 366 | } else { |
| 367 | *type = (tag >> 3) & 0x0f; |
| 368 | *size = tag & 0x07; |
| 369 | } |
| 370 | #if 0 |
| 371 | printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, *size); |
| 372 | #endif |
| 373 | if (type == 0) /* wrong type */ |
| 374 | return -1; |
| 375 | if (*type == 0xff && *size == 0xffff) /* probably invalid data */ |
| 376 | return -1; |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * Skip specified number of bytes from stream. |
| 382 | */ |
| 383 | |
| 384 | static void __init isapnp_skip_bytes(int count) |
| 385 | { |
| 386 | isapnp_peek(NULL, count); |
| 387 | } |
| 388 | |
| 389 | /* |
| 390 | * Parse EISA id. |
| 391 | */ |
| 392 | |
| 393 | static void isapnp_parse_id(struct pnp_dev * dev, unsigned short vendor, unsigned short device) |
| 394 | { |
| 395 | struct pnp_id * id; |
| 396 | if (!dev) |
| 397 | return; |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 398 | id = kcalloc(1, sizeof(struct pnp_id), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | if (!id) |
| 400 | return; |
| 401 | sprintf(id->id, "%c%c%c%x%x%x%x", |
| 402 | 'A' + ((vendor >> 2) & 0x3f) - 1, |
| 403 | 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, |
| 404 | 'A' + ((vendor >> 8) & 0x1f) - 1, |
| 405 | (device >> 4) & 0x0f, |
| 406 | device & 0x0f, |
| 407 | (device >> 12) & 0x0f, |
| 408 | (device >> 8) & 0x0f); |
| 409 | pnp_add_id(id, dev); |
| 410 | } |
| 411 | |
| 412 | /* |
| 413 | * Parse logical device tag. |
| 414 | */ |
| 415 | |
| 416 | static struct pnp_dev * __init isapnp_parse_device(struct pnp_card *card, int size, int number) |
| 417 | { |
| 418 | unsigned char tmp[6]; |
| 419 | struct pnp_dev *dev; |
| 420 | |
| 421 | isapnp_peek(tmp, size); |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 422 | dev = kcalloc(1, sizeof(struct pnp_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | if (!dev) |
| 424 | return NULL; |
| 425 | dev->number = number; |
| 426 | isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]); |
| 427 | dev->regs = tmp[4]; |
| 428 | dev->card = card; |
| 429 | if (size > 5) |
| 430 | dev->regs |= tmp[5] << 8; |
| 431 | dev->protocol = &isapnp_protocol; |
| 432 | dev->capabilities |= PNP_CONFIGURABLE; |
| 433 | dev->capabilities |= PNP_READ; |
| 434 | dev->capabilities |= PNP_WRITE; |
| 435 | dev->capabilities |= PNP_DISABLE; |
| 436 | pnp_init_resource_table(&dev->res); |
| 437 | return dev; |
| 438 | } |
| 439 | |
| 440 | |
| 441 | /* |
| 442 | * Add IRQ resource to resources list. |
| 443 | */ |
| 444 | |
| 445 | static void __init isapnp_parse_irq_resource(struct pnp_option *option, |
| 446 | int size) |
| 447 | { |
| 448 | unsigned char tmp[3]; |
| 449 | struct pnp_irq *irq; |
| 450 | unsigned long bits; |
| 451 | |
| 452 | isapnp_peek(tmp, size); |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 453 | irq = kcalloc(1, sizeof(struct pnp_irq), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | if (!irq) |
| 455 | return; |
| 456 | bits = (tmp[1] << 8) | tmp[0]; |
| 457 | bitmap_copy(irq->map, &bits, 16); |
| 458 | if (size > 2) |
| 459 | irq->flags = tmp[2]; |
| 460 | else |
| 461 | irq->flags = IORESOURCE_IRQ_HIGHEDGE; |
| 462 | pnp_register_irq_resource(option, irq); |
| 463 | return; |
| 464 | } |
| 465 | |
| 466 | /* |
| 467 | * Add DMA resource to resources list. |
| 468 | */ |
| 469 | |
| 470 | static void __init isapnp_parse_dma_resource(struct pnp_option *option, |
| 471 | int size) |
| 472 | { |
| 473 | unsigned char tmp[2]; |
| 474 | struct pnp_dma *dma; |
| 475 | |
| 476 | isapnp_peek(tmp, size); |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 477 | dma = kcalloc(1, sizeof(struct pnp_dma), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | if (!dma) |
| 479 | return; |
| 480 | dma->map = tmp[0]; |
| 481 | dma->flags = tmp[1]; |
| 482 | pnp_register_dma_resource(option, dma); |
| 483 | return; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * Add port resource to resources list. |
| 488 | */ |
| 489 | |
| 490 | static void __init isapnp_parse_port_resource(struct pnp_option *option, |
| 491 | int size) |
| 492 | { |
| 493 | unsigned char tmp[7]; |
| 494 | struct pnp_port *port; |
| 495 | |
| 496 | isapnp_peek(tmp, size); |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 497 | port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | if (!port) |
| 499 | return; |
| 500 | port->min = (tmp[2] << 8) | tmp[1]; |
| 501 | port->max = (tmp[4] << 8) | tmp[3]; |
| 502 | port->align = tmp[5]; |
| 503 | port->size = tmp[6]; |
| 504 | port->flags = tmp[0] ? PNP_PORT_FLAG_16BITADDR : 0; |
| 505 | pnp_register_port_resource(option,port); |
| 506 | return; |
| 507 | } |
| 508 | |
| 509 | /* |
| 510 | * Add fixed port resource to resources list. |
| 511 | */ |
| 512 | |
| 513 | static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option, |
| 514 | int size) |
| 515 | { |
| 516 | unsigned char tmp[3]; |
| 517 | struct pnp_port *port; |
| 518 | |
| 519 | isapnp_peek(tmp, size); |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 520 | port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | if (!port) |
| 522 | return; |
| 523 | port->min = port->max = (tmp[1] << 8) | tmp[0]; |
| 524 | port->size = tmp[2]; |
| 525 | port->align = 0; |
| 526 | port->flags = PNP_PORT_FLAG_FIXED; |
| 527 | pnp_register_port_resource(option,port); |
| 528 | return; |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * Add memory resource to resources list. |
| 533 | */ |
| 534 | |
| 535 | static void __init isapnp_parse_mem_resource(struct pnp_option *option, |
| 536 | int size) |
| 537 | { |
| 538 | unsigned char tmp[9]; |
| 539 | struct pnp_mem *mem; |
| 540 | |
| 541 | isapnp_peek(tmp, size); |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 542 | mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | if (!mem) |
| 544 | return; |
| 545 | mem->min = ((tmp[2] << 8) | tmp[1]) << 8; |
| 546 | mem->max = ((tmp[4] << 8) | tmp[3]) << 8; |
| 547 | mem->align = (tmp[6] << 8) | tmp[5]; |
| 548 | mem->size = ((tmp[8] << 8) | tmp[7]) << 8; |
| 549 | mem->flags = tmp[0]; |
| 550 | pnp_register_mem_resource(option,mem); |
| 551 | return; |
| 552 | } |
| 553 | |
| 554 | /* |
| 555 | * Add 32-bit memory resource to resources list. |
| 556 | */ |
| 557 | |
| 558 | static void __init isapnp_parse_mem32_resource(struct pnp_option *option, |
| 559 | int size) |
| 560 | { |
| 561 | unsigned char tmp[17]; |
| 562 | struct pnp_mem *mem; |
| 563 | |
| 564 | isapnp_peek(tmp, size); |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 565 | mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | if (!mem) |
| 567 | return; |
| 568 | mem->min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; |
| 569 | mem->max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; |
| 570 | mem->align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; |
| 571 | mem->size = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; |
| 572 | mem->flags = tmp[0]; |
| 573 | pnp_register_mem_resource(option,mem); |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * Add 32-bit fixed memory resource to resources list. |
| 578 | */ |
| 579 | |
| 580 | static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option, |
| 581 | int size) |
| 582 | { |
| 583 | unsigned char tmp[9]; |
| 584 | struct pnp_mem *mem; |
| 585 | |
| 586 | isapnp_peek(tmp, size); |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 587 | mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | if (!mem) |
| 589 | return; |
| 590 | mem->min = mem->max = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; |
| 591 | mem->size = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; |
| 592 | mem->align = 0; |
| 593 | mem->flags = tmp[0]; |
| 594 | pnp_register_mem_resource(option,mem); |
| 595 | } |
| 596 | |
| 597 | /* |
| 598 | * Parse card name for ISA PnP device. |
| 599 | */ |
| 600 | |
| 601 | static void __init |
| 602 | isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size) |
| 603 | { |
| 604 | if (name[0] == '\0') { |
| 605 | unsigned short size1 = *size >= name_max ? (name_max - 1) : *size; |
| 606 | isapnp_peek(name, size1); |
| 607 | name[size1] = '\0'; |
| 608 | *size -= size1; |
| 609 | |
| 610 | /* clean whitespace from end of string */ |
| 611 | while (size1 > 0 && name[--size1] == ' ') |
| 612 | name[size1] = '\0'; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | * Parse resource map for logical device. |
| 618 | */ |
| 619 | |
| 620 | static int __init isapnp_create_device(struct pnp_card *card, |
| 621 | unsigned short size) |
| 622 | { |
| 623 | int number = 0, skip = 0, priority = 0, compat = 0; |
| 624 | unsigned char type, tmp[17]; |
| 625 | struct pnp_option *option; |
| 626 | struct pnp_dev *dev; |
| 627 | if ((dev = isapnp_parse_device(card, size, number++)) == NULL) |
| 628 | return 1; |
| 629 | option = pnp_register_independent_option(dev); |
| 630 | if (!option) { |
| 631 | kfree(dev); |
| 632 | return 1; |
| 633 | } |
| 634 | pnp_add_card_device(card,dev); |
| 635 | |
| 636 | while (1) { |
| 637 | if (isapnp_read_tag(&type, &size)<0) |
| 638 | return 1; |
| 639 | if (skip && type != _STAG_LOGDEVID && type != _STAG_END) |
| 640 | goto __skip; |
| 641 | switch (type) { |
| 642 | case _STAG_LOGDEVID: |
| 643 | if (size >= 5 && size <= 6) { |
| 644 | if ((dev = isapnp_parse_device(card, size, number++)) == NULL) |
| 645 | return 1; |
| 646 | size = 0; |
| 647 | skip = 0; |
| 648 | option = pnp_register_independent_option(dev); |
Jesper Juhl | 656bde5 | 2006-03-25 03:08:12 -0800 | [diff] [blame] | 649 | if (!option) { |
| 650 | kfree(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | return 1; |
Jesper Juhl | 656bde5 | 2006-03-25 03:08:12 -0800 | [diff] [blame] | 652 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | pnp_add_card_device(card,dev); |
| 654 | } else { |
| 655 | skip = 1; |
| 656 | } |
| 657 | priority = 0; |
| 658 | compat = 0; |
| 659 | break; |
| 660 | case _STAG_COMPATDEVID: |
| 661 | if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { |
| 662 | isapnp_peek(tmp, 4); |
| 663 | isapnp_parse_id(dev,(tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]); |
| 664 | compat++; |
| 665 | size = 0; |
| 666 | } |
| 667 | break; |
| 668 | case _STAG_IRQ: |
| 669 | if (size < 2 || size > 3) |
| 670 | goto __skip; |
| 671 | isapnp_parse_irq_resource(option, size); |
| 672 | size = 0; |
| 673 | break; |
| 674 | case _STAG_DMA: |
| 675 | if (size != 2) |
| 676 | goto __skip; |
| 677 | isapnp_parse_dma_resource(option, size); |
| 678 | size = 0; |
| 679 | break; |
| 680 | case _STAG_STARTDEP: |
| 681 | if (size > 1) |
| 682 | goto __skip; |
| 683 | priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE; |
| 684 | if (size > 0) { |
| 685 | isapnp_peek(tmp, size); |
| 686 | priority = 0x100 | tmp[0]; |
| 687 | size = 0; |
| 688 | } |
| 689 | option = pnp_register_dependent_option(dev,priority); |
| 690 | if (!option) |
| 691 | return 1; |
| 692 | break; |
| 693 | case _STAG_ENDDEP: |
| 694 | if (size != 0) |
| 695 | goto __skip; |
| 696 | priority = 0; |
| 697 | break; |
| 698 | case _STAG_IOPORT: |
| 699 | if (size != 7) |
| 700 | goto __skip; |
| 701 | isapnp_parse_port_resource(option, size); |
| 702 | size = 0; |
| 703 | break; |
| 704 | case _STAG_FIXEDIO: |
| 705 | if (size != 3) |
| 706 | goto __skip; |
| 707 | isapnp_parse_fixed_port_resource(option, size); |
| 708 | size = 0; |
| 709 | break; |
| 710 | case _STAG_VENDOR: |
| 711 | break; |
| 712 | case _LTAG_MEMRANGE: |
| 713 | if (size != 9) |
| 714 | goto __skip; |
| 715 | isapnp_parse_mem_resource(option, size); |
| 716 | size = 0; |
| 717 | break; |
| 718 | case _LTAG_ANSISTR: |
| 719 | isapnp_parse_name(dev->name, sizeof(dev->name), &size); |
| 720 | break; |
| 721 | case _LTAG_UNICODESTR: |
| 722 | /* silently ignore */ |
| 723 | /* who use unicode for hardware identification? */ |
| 724 | break; |
| 725 | case _LTAG_VENDOR: |
| 726 | break; |
| 727 | case _LTAG_MEM32RANGE: |
| 728 | if (size != 17) |
| 729 | goto __skip; |
| 730 | isapnp_parse_mem32_resource(option, size); |
| 731 | size = 0; |
| 732 | break; |
| 733 | case _LTAG_FIXEDMEM32RANGE: |
| 734 | if (size != 9) |
| 735 | goto __skip; |
| 736 | isapnp_parse_fixed_mem32_resource(option, size); |
| 737 | size = 0; |
| 738 | break; |
| 739 | case _STAG_END: |
| 740 | if (size > 0) |
| 741 | isapnp_skip_bytes(size); |
| 742 | return 1; |
| 743 | default: |
| 744 | printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", type, dev->number, card->number); |
| 745 | } |
| 746 | __skip: |
| 747 | if (size > 0) |
| 748 | isapnp_skip_bytes(size); |
| 749 | } |
| 750 | return 0; |
| 751 | } |
| 752 | |
| 753 | /* |
| 754 | * Parse resource map for ISA PnP card. |
| 755 | */ |
| 756 | |
| 757 | static void __init isapnp_parse_resource_map(struct pnp_card *card) |
| 758 | { |
| 759 | unsigned char type, tmp[17]; |
| 760 | unsigned short size; |
| 761 | |
| 762 | while (1) { |
| 763 | if (isapnp_read_tag(&type, &size)<0) |
| 764 | return; |
| 765 | switch (type) { |
| 766 | case _STAG_PNPVERNO: |
| 767 | if (size != 2) |
| 768 | goto __skip; |
| 769 | isapnp_peek(tmp, 2); |
| 770 | card->pnpver = tmp[0]; |
| 771 | card->productver = tmp[1]; |
| 772 | size = 0; |
| 773 | break; |
| 774 | case _STAG_LOGDEVID: |
| 775 | if (size >= 5 && size <= 6) { |
| 776 | if (isapnp_create_device(card, size)==1) |
| 777 | return; |
| 778 | size = 0; |
| 779 | } |
| 780 | break; |
| 781 | case _STAG_VENDOR: |
| 782 | break; |
| 783 | case _LTAG_ANSISTR: |
| 784 | isapnp_parse_name(card->name, sizeof(card->name), &size); |
| 785 | break; |
| 786 | case _LTAG_UNICODESTR: |
| 787 | /* silently ignore */ |
| 788 | /* who use unicode for hardware identification? */ |
| 789 | break; |
| 790 | case _LTAG_VENDOR: |
| 791 | break; |
| 792 | case _STAG_END: |
| 793 | if (size > 0) |
| 794 | isapnp_skip_bytes(size); |
| 795 | return; |
| 796 | default: |
| 797 | printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", type, card->number); |
| 798 | } |
| 799 | __skip: |
| 800 | if (size > 0) |
| 801 | isapnp_skip_bytes(size); |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | /* |
| 806 | * Compute ISA PnP checksum for first eight bytes. |
| 807 | */ |
| 808 | |
| 809 | static unsigned char __init isapnp_checksum(unsigned char *data) |
| 810 | { |
| 811 | int i, j; |
| 812 | unsigned char checksum = 0x6a, bit, b; |
| 813 | |
| 814 | for (i = 0; i < 8; i++) { |
| 815 | b = data[i]; |
| 816 | for (j = 0; j < 8; j++) { |
| 817 | bit = 0; |
| 818 | if (b & (1 << j)) |
| 819 | bit = 1; |
| 820 | checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1); |
| 821 | } |
| 822 | } |
| 823 | return checksum; |
| 824 | } |
| 825 | |
| 826 | /* |
| 827 | * Parse EISA id for ISA PnP card. |
| 828 | */ |
| 829 | |
| 830 | static void isapnp_parse_card_id(struct pnp_card * card, unsigned short vendor, unsigned short device) |
| 831 | { |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 832 | struct pnp_id * id = kcalloc(1, sizeof(struct pnp_id), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | if (!id) |
| 834 | return; |
| 835 | sprintf(id->id, "%c%c%c%x%x%x%x", |
| 836 | 'A' + ((vendor >> 2) & 0x3f) - 1, |
| 837 | 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, |
| 838 | 'A' + ((vendor >> 8) & 0x1f) - 1, |
| 839 | (device >> 4) & 0x0f, |
| 840 | device & 0x0f, |
| 841 | (device >> 12) & 0x0f, |
| 842 | (device >> 8) & 0x0f); |
| 843 | pnp_add_card_id(id,card); |
| 844 | } |
| 845 | |
| 846 | /* |
| 847 | * Build device list for all present ISA PnP devices. |
| 848 | */ |
| 849 | |
| 850 | static int __init isapnp_build_device_list(void) |
| 851 | { |
| 852 | int csn; |
| 853 | unsigned char header[9], checksum; |
| 854 | struct pnp_card *card; |
| 855 | |
| 856 | isapnp_wait(); |
| 857 | isapnp_key(); |
| 858 | for (csn = 1; csn <= isapnp_csn_count; csn++) { |
| 859 | isapnp_wake(csn); |
| 860 | isapnp_peek(header, 9); |
| 861 | checksum = isapnp_checksum(header); |
| 862 | #if 0 |
| 863 | printk(KERN_DEBUG "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", |
| 864 | header[0], header[1], header[2], header[3], |
| 865 | header[4], header[5], header[6], header[7], header[8]); |
| 866 | printk(KERN_DEBUG "checksum = 0x%x\n", checksum); |
| 867 | #endif |
Bjorn Helgaas | a2822e7 | 2005-09-06 15:16:51 -0700 | [diff] [blame] | 868 | if ((card = kcalloc(1, sizeof(struct pnp_card), GFP_KERNEL)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | continue; |
| 870 | |
| 871 | card->number = csn; |
| 872 | INIT_LIST_HEAD(&card->devices); |
| 873 | isapnp_parse_card_id(card, (header[1] << 8) | header[0], (header[3] << 8) | header[2]); |
| 874 | card->serial = (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | header[4]; |
| 875 | isapnp_checksum_value = 0x00; |
| 876 | isapnp_parse_resource_map(card); |
| 877 | if (isapnp_checksum_value != 0x00) |
| 878 | printk(KERN_ERR "isapnp: checksum for device %i is not valid (0x%x)\n", csn, isapnp_checksum_value); |
| 879 | card->checksum = isapnp_checksum_value; |
| 880 | card->protocol = &isapnp_protocol; |
| 881 | |
| 882 | pnp_add_card(card); |
| 883 | } |
| 884 | isapnp_wait(); |
| 885 | return 0; |
| 886 | } |
| 887 | |
| 888 | /* |
| 889 | * Basic configuration routines. |
| 890 | */ |
| 891 | |
| 892 | int isapnp_present(void) |
| 893 | { |
| 894 | struct pnp_card *card; |
| 895 | pnp_for_each_card(card) { |
| 896 | if (card->protocol == &isapnp_protocol) |
| 897 | return 1; |
| 898 | } |
| 899 | return 0; |
| 900 | } |
| 901 | |
| 902 | int isapnp_cfg_begin(int csn, int logdev) |
| 903 | { |
| 904 | if (csn < 1 || csn > isapnp_csn_count || logdev > 10) |
| 905 | return -EINVAL; |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 906 | mutex_lock(&isapnp_cfg_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | isapnp_wait(); |
| 908 | isapnp_key(); |
| 909 | isapnp_wake(csn); |
| 910 | #if 0 |
| 911 | /* to avoid malfunction when the isapnptools package is used */ |
| 912 | /* we must set RDP to our value again */ |
| 913 | /* it is possible to set RDP only in the isolation phase */ |
| 914 | /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */ |
| 915 | isapnp_write_byte(0x02, 0x04); /* clear CSN of card */ |
| 916 | mdelay(2); /* is this necessary? */ |
| 917 | isapnp_wake(csn); /* bring card into sleep state */ |
| 918 | isapnp_wake(0); /* bring card into isolation state */ |
| 919 | isapnp_set_rdp(); /* reset the RDP port */ |
| 920 | udelay(1000); /* delay 1000us */ |
| 921 | isapnp_write_byte(0x06, csn); /* reset CSN to previous value */ |
| 922 | udelay(250); /* is this necessary? */ |
| 923 | #endif |
| 924 | if (logdev >= 0) |
| 925 | isapnp_device(logdev); |
| 926 | return 0; |
| 927 | } |
| 928 | |
| 929 | int isapnp_cfg_end(void) |
| 930 | { |
| 931 | isapnp_wait(); |
Ingo Molnar | 14cc3e2 | 2006-03-26 01:37:14 -0800 | [diff] [blame] | 932 | mutex_unlock(&isapnp_cfg_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | |
| 937 | /* |
| 938 | * Inititialization. |
| 939 | */ |
| 940 | |
| 941 | |
| 942 | EXPORT_SYMBOL(isapnp_protocol); |
| 943 | EXPORT_SYMBOL(isapnp_present); |
| 944 | EXPORT_SYMBOL(isapnp_cfg_begin); |
| 945 | EXPORT_SYMBOL(isapnp_cfg_end); |
Adrian Bunk | b449f63 | 2005-11-07 01:01:48 -0800 | [diff] [blame] | 946 | #if 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | EXPORT_SYMBOL(isapnp_read_byte); |
Adrian Bunk | b449f63 | 2005-11-07 01:01:48 -0800 | [diff] [blame] | 948 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | EXPORT_SYMBOL(isapnp_write_byte); |
| 950 | |
| 951 | static int isapnp_read_resources(struct pnp_dev *dev, struct pnp_resource_table *res) |
| 952 | { |
| 953 | int tmp, ret; |
| 954 | |
| 955 | dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); |
| 956 | if (dev->active) { |
| 957 | for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) { |
| 958 | ret = isapnp_read_word(ISAPNP_CFG_PORT + (tmp << 1)); |
| 959 | if (!ret) |
| 960 | continue; |
| 961 | res->port_resource[tmp].start = ret; |
| 962 | res->port_resource[tmp].flags = IORESOURCE_IO; |
| 963 | } |
| 964 | for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) { |
| 965 | ret = isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8; |
| 966 | if (!ret) |
| 967 | continue; |
| 968 | res->mem_resource[tmp].start = ret; |
| 969 | res->mem_resource[tmp].flags = IORESOURCE_MEM; |
| 970 | } |
| 971 | for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) { |
| 972 | ret = (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >> 8); |
| 973 | if (!ret) |
| 974 | continue; |
| 975 | res->irq_resource[tmp].start = res->irq_resource[tmp].end = ret; |
| 976 | res->irq_resource[tmp].flags = IORESOURCE_IRQ; |
| 977 | } |
| 978 | for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) { |
| 979 | ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp); |
| 980 | if (ret == 4) |
| 981 | continue; |
| 982 | res->dma_resource[tmp].start = res->dma_resource[tmp].end = ret; |
| 983 | res->dma_resource[tmp].flags = IORESOURCE_DMA; |
| 984 | } |
| 985 | } |
| 986 | return 0; |
| 987 | } |
| 988 | |
| 989 | static int isapnp_get_resources(struct pnp_dev *dev, struct pnp_resource_table * res) |
| 990 | { |
| 991 | int ret; |
| 992 | pnp_init_resource_table(res); |
| 993 | isapnp_cfg_begin(dev->card->number, dev->number); |
| 994 | ret = isapnp_read_resources(dev, res); |
| 995 | isapnp_cfg_end(); |
| 996 | return ret; |
| 997 | } |
| 998 | |
| 999 | static int isapnp_set_resources(struct pnp_dev *dev, struct pnp_resource_table * res) |
| 1000 | { |
| 1001 | int tmp; |
| 1002 | |
| 1003 | isapnp_cfg_begin(dev->card->number, dev->number); |
| 1004 | dev->active = 1; |
| 1005 | for (tmp = 0; tmp < PNP_MAX_PORT && (res->port_resource[tmp].flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO; tmp++) |
| 1006 | isapnp_write_word(ISAPNP_CFG_PORT+(tmp<<1), res->port_resource[tmp].start); |
| 1007 | for (tmp = 0; tmp < PNP_MAX_IRQ && (res->irq_resource[tmp].flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ; tmp++) { |
| 1008 | int irq = res->irq_resource[tmp].start; |
| 1009 | if (irq == 2) |
| 1010 | irq = 9; |
| 1011 | isapnp_write_byte(ISAPNP_CFG_IRQ+(tmp<<1), irq); |
| 1012 | } |
| 1013 | for (tmp = 0; tmp < PNP_MAX_DMA && (res->dma_resource[tmp].flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA; tmp++) |
| 1014 | isapnp_write_byte(ISAPNP_CFG_DMA+tmp, res->dma_resource[tmp].start); |
| 1015 | for (tmp = 0; tmp < PNP_MAX_MEM && (res->mem_resource[tmp].flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM; tmp++) |
| 1016 | isapnp_write_word(ISAPNP_CFG_MEM+(tmp<<3), (res->mem_resource[tmp].start >> 8) & 0xffff); |
| 1017 | /* FIXME: We aren't handling 32bit mems properly here */ |
| 1018 | isapnp_activate(dev->number); |
| 1019 | isapnp_cfg_end(); |
| 1020 | return 0; |
| 1021 | } |
| 1022 | |
| 1023 | static int isapnp_disable_resources(struct pnp_dev *dev) |
| 1024 | { |
| 1025 | if (!dev || !dev->active) |
| 1026 | return -EINVAL; |
| 1027 | isapnp_cfg_begin(dev->card->number, dev->number); |
| 1028 | isapnp_deactivate(dev->number); |
| 1029 | dev->active = 0; |
| 1030 | isapnp_cfg_end(); |
| 1031 | return 0; |
| 1032 | } |
| 1033 | |
| 1034 | struct pnp_protocol isapnp_protocol = { |
| 1035 | .name = "ISA Plug and Play", |
| 1036 | .get = isapnp_get_resources, |
| 1037 | .set = isapnp_set_resources, |
| 1038 | .disable = isapnp_disable_resources, |
| 1039 | }; |
| 1040 | |
| 1041 | static int __init isapnp_init(void) |
| 1042 | { |
| 1043 | int cards; |
| 1044 | struct pnp_card *card; |
| 1045 | struct pnp_dev *dev; |
| 1046 | |
| 1047 | if (isapnp_disable) { |
| 1048 | isapnp_detected = 0; |
| 1049 | printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); |
| 1050 | return 0; |
| 1051 | } |
David Woodhouse | 07bd1c4 | 2006-09-27 08:18:55 +0100 | [diff] [blame] | 1052 | #ifdef CONFIG_PPC_MERGE |
| 1053 | if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP)) |
| 1054 | return -EINVAL; |
| 1055 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | #ifdef ISAPNP_REGION_OK |
| 1057 | if (!request_region(_PIDXR, 1, "isapnp index")) { |
| 1058 | printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", _PIDXR); |
| 1059 | return -EBUSY; |
| 1060 | } |
| 1061 | #endif |
| 1062 | if (!request_region(_PNPWRP, 1, "isapnp write")) { |
| 1063 | printk(KERN_ERR "isapnp: Write Data Register 0x%x already used\n", _PNPWRP); |
| 1064 | #ifdef ISAPNP_REGION_OK |
| 1065 | release_region(_PIDXR, 1); |
| 1066 | #endif |
| 1067 | return -EBUSY; |
| 1068 | } |
| 1069 | |
| 1070 | if(pnp_register_protocol(&isapnp_protocol)<0) |
| 1071 | return -EBUSY; |
| 1072 | |
| 1073 | /* |
| 1074 | * Print a message. The existing ISAPnP code is hanging machines |
| 1075 | * so let the user know where. |
| 1076 | */ |
| 1077 | |
| 1078 | printk(KERN_INFO "isapnp: Scanning for PnP cards...\n"); |
| 1079 | if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) { |
| 1080 | isapnp_rdp |= 3; |
| 1081 | if (!request_region(isapnp_rdp, 1, "isapnp read")) { |
| 1082 | printk(KERN_ERR "isapnp: Read Data Register 0x%x already used\n", isapnp_rdp); |
| 1083 | #ifdef ISAPNP_REGION_OK |
| 1084 | release_region(_PIDXR, 1); |
| 1085 | #endif |
| 1086 | release_region(_PNPWRP, 1); |
| 1087 | return -EBUSY; |
| 1088 | } |
| 1089 | isapnp_set_rdp(); |
| 1090 | } |
| 1091 | isapnp_detected = 1; |
| 1092 | if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) { |
| 1093 | cards = isapnp_isolate(); |
| 1094 | if (cards < 0 || |
| 1095 | (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) { |
| 1096 | #ifdef ISAPNP_REGION_OK |
| 1097 | release_region(_PIDXR, 1); |
| 1098 | #endif |
| 1099 | release_region(_PNPWRP, 1); |
| 1100 | isapnp_detected = 0; |
| 1101 | printk(KERN_INFO "isapnp: No Plug & Play device found\n"); |
| 1102 | return 0; |
| 1103 | } |
| 1104 | request_region(isapnp_rdp, 1, "isapnp read"); |
| 1105 | } |
| 1106 | isapnp_build_device_list(); |
| 1107 | cards = 0; |
| 1108 | |
| 1109 | protocol_for_each_card(&isapnp_protocol,card) { |
| 1110 | cards++; |
| 1111 | if (isapnp_verbose) { |
| 1112 | printk(KERN_INFO "isapnp: Card '%s'\n", card->name[0]?card->name:"Unknown"); |
| 1113 | if (isapnp_verbose < 2) |
| 1114 | continue; |
| 1115 | card_for_each_dev(card,dev) { |
| 1116 | printk(KERN_INFO "isapnp: Device '%s'\n", dev->name[0]?dev->name:"Unknown"); |
| 1117 | } |
| 1118 | } |
| 1119 | } |
| 1120 | if (cards) { |
| 1121 | printk(KERN_INFO "isapnp: %i Plug & Play card%s detected total\n", cards, cards>1?"s":""); |
| 1122 | } else { |
| 1123 | printk(KERN_INFO "isapnp: No Plug & Play card found\n"); |
| 1124 | } |
| 1125 | |
| 1126 | isapnp_proc_init(); |
| 1127 | return 0; |
| 1128 | } |
| 1129 | |
| 1130 | device_initcall(isapnp_init); |
| 1131 | |
| 1132 | /* format is: noisapnp */ |
| 1133 | |
| 1134 | static int __init isapnp_setup_disable(char *str) |
| 1135 | { |
| 1136 | isapnp_disable = 1; |
| 1137 | return 1; |
| 1138 | } |
| 1139 | |
| 1140 | __setup("noisapnp", isapnp_setup_disable); |
| 1141 | |
| 1142 | /* format is: isapnp=rdp,reset,skip_pci_scan,verbose */ |
| 1143 | |
| 1144 | static int __init isapnp_setup_isapnp(char *str) |
| 1145 | { |
| 1146 | (void)((get_option(&str,&isapnp_rdp) == 2) && |
| 1147 | (get_option(&str,&isapnp_reset) == 2) && |
| 1148 | (get_option(&str,&isapnp_verbose) == 2)); |
| 1149 | return 1; |
| 1150 | } |
| 1151 | |
| 1152 | __setup("isapnp=", isapnp_setup_isapnp); |
| 1153 | |