ide-floppy.c revision de699ad595fb45022d1b049ed91ffd06fdd16c13
1/* 2 * IDE ATAPI floppy driver. 3 * 4 * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il> 5 * Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net> 6 * Copyright (C) 2005 Bartlomiej Zolnierkiewicz 7 * 8 * This driver supports the following IDE floppy drives: 9 * 10 * LS-120/240 SuperDisk 11 * Iomega Zip 100/250 12 * Iomega PC Card Clik!/PocketZip 13 * 14 * For a historical changelog see 15 * Documentation/ide/ChangeLog.ide-floppy.1996-2002 16 */ 17 18#define DRV_NAME "ide-floppy" 19 20#define IDEFLOPPY_VERSION "1.00" 21 22#include <linux/module.h> 23#include <linux/types.h> 24#include <linux/string.h> 25#include <linux/kernel.h> 26#include <linux/delay.h> 27#include <linux/timer.h> 28#include <linux/mm.h> 29#include <linux/interrupt.h> 30#include <linux/major.h> 31#include <linux/errno.h> 32#include <linux/genhd.h> 33#include <linux/slab.h> 34#include <linux/cdrom.h> 35#include <linux/ide.h> 36#include <linux/hdreg.h> 37#include <linux/bitops.h> 38#include <linux/mutex.h> 39#include <linux/scatterlist.h> 40 41#include <scsi/scsi_ioctl.h> 42 43#include <asm/byteorder.h> 44#include <linux/irq.h> 45#include <linux/uaccess.h> 46#include <linux/io.h> 47#include <asm/unaligned.h> 48 49#include "ide-floppy.h" 50 51/* define to see debug info */ 52#define IDEFLOPPY_DEBUG_LOG 0 53 54/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 55#define IDEFLOPPY_DEBUG(fmt, args...) 56 57#if IDEFLOPPY_DEBUG_LOG 58#define debug_log(fmt, args...) \ 59 printk(KERN_INFO "ide-floppy: " fmt, ## args) 60#else 61#define debug_log(fmt, args...) do {} while (0) 62#endif 63 64 65/* Some drives require a longer irq timeout. */ 66#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 67 68/* 69 * After each failed packet command we issue a request sense command and retry 70 * the packet command IDEFLOPPY_MAX_PC_RETRIES times. 71 */ 72#define IDEFLOPPY_MAX_PC_RETRIES 3 73 74/* format capacities descriptor codes */ 75#define CAPACITY_INVALID 0x00 76#define CAPACITY_UNFORMATTED 0x01 77#define CAPACITY_CURRENT 0x02 78#define CAPACITY_NO_CARTRIDGE 0x03 79 80#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 81 82/* Error code returned in rq->errors to the higher part of the driver. */ 83#define IDEFLOPPY_ERROR_GENERAL 101 84 85static DEFINE_MUTEX(idefloppy_ref_mutex); 86 87#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 88 89#define ide_floppy_g(disk) \ 90 container_of((disk)->private_data, struct ide_floppy_obj, driver) 91 92static void idefloppy_cleanup_obj(struct kref *); 93 94static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 95{ 96 struct ide_floppy_obj *floppy = NULL; 97 98 mutex_lock(&idefloppy_ref_mutex); 99 floppy = ide_floppy_g(disk); 100 if (floppy) { 101 if (ide_device_get(floppy->drive)) 102 floppy = NULL; 103 else 104 kref_get(&floppy->kref); 105 } 106 mutex_unlock(&idefloppy_ref_mutex); 107 return floppy; 108} 109 110static void ide_floppy_put(struct ide_floppy_obj *floppy) 111{ 112 ide_drive_t *drive = floppy->drive; 113 114 mutex_lock(&idefloppy_ref_mutex); 115 kref_put(&floppy->kref, idefloppy_cleanup_obj); 116 ide_device_put(drive); 117 mutex_unlock(&idefloppy_ref_mutex); 118} 119 120/* 121 * Used to finish servicing a request. For read/write requests, we will call 122 * ide_end_request to pass to the next buffer. 123 */ 124static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) 125{ 126 idefloppy_floppy_t *floppy = drive->driver_data; 127 struct request *rq = HWGROUP(drive)->rq; 128 int error; 129 130 debug_log("Reached %s\n", __func__); 131 132 switch (uptodate) { 133 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 134 case 1: error = 0; break; 135 default: error = uptodate; 136 } 137 if (error) 138 floppy->failed_pc = NULL; 139 /* Why does this happen? */ 140 if (!rq) 141 return 0; 142 if (!blk_special_request(rq)) { 143 /* our real local end request function */ 144 ide_end_request(drive, uptodate, nsecs); 145 return 0; 146 } 147 rq->errors = error; 148 /* fixme: need to move this local also */ 149 ide_end_drive_cmd(drive, 0, 0); 150 return 0; 151} 152 153static void idefloppy_update_buffers(ide_drive_t *drive, 154 struct ide_atapi_pc *pc) 155{ 156 struct request *rq = pc->rq; 157 struct bio *bio = rq->bio; 158 159 while ((bio = rq->bio) != NULL) 160 idefloppy_end_request(drive, 1, 0); 161} 162 163static void ide_floppy_callback(ide_drive_t *drive) 164{ 165 idefloppy_floppy_t *floppy = drive->driver_data; 166 struct ide_atapi_pc *pc = floppy->pc; 167 int uptodate = pc->error ? 0 : 1; 168 169 debug_log("Reached %s\n", __func__); 170 171 if (floppy->failed_pc == pc) 172 floppy->failed_pc = NULL; 173 174 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 || 175 (pc->rq && blk_pc_request(pc->rq))) 176 uptodate = 1; /* FIXME */ 177 else if (pc->c[0] == GPCMD_REQUEST_SENSE) { 178 u8 *buf = floppy->pc->buf; 179 180 if (!pc->error) { 181 floppy->sense_key = buf[2] & 0x0F; 182 floppy->asc = buf[12]; 183 floppy->ascq = buf[13]; 184 floppy->progress_indication = buf[15] & 0x80 ? 185 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 186 187 if (floppy->failed_pc) 188 debug_log("pc = %x, ", floppy->failed_pc->c[0]); 189 190 debug_log("sense key = %x, asc = %x, ascq = %x\n", 191 floppy->sense_key, floppy->asc, floppy->ascq); 192 } else 193 printk(KERN_ERR "Error in REQUEST SENSE itself - " 194 "Aborting request!\n"); 195 } 196 197 idefloppy_end_request(drive, uptodate, 0); 198} 199 200void ide_floppy_create_request_sense_cmd(struct ide_atapi_pc *pc) 201{ 202 ide_init_pc(pc); 203 pc->c[0] = GPCMD_REQUEST_SENSE; 204 pc->c[4] = 255; 205 pc->req_xfer = 18; 206} 207 208/* 209 * Called when an error was detected during the last packet command. We queue a 210 * request sense packet command in the head of the request list. 211 */ 212static void idefloppy_retry_pc(ide_drive_t *drive) 213{ 214 struct ide_floppy_obj *floppy = drive->driver_data; 215 struct request *rq = &floppy->request_sense_rq; 216 struct ide_atapi_pc *pc = &floppy->request_sense_pc; 217 218 (void)ide_read_error(drive); 219 ide_floppy_create_request_sense_cmd(pc); 220 ide_queue_pc_head(drive, floppy->disk, pc, rq); 221} 222 223/* The usual interrupt handler called during a packet command. */ 224static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) 225{ 226 idefloppy_floppy_t *floppy = drive->driver_data; 227 228 return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr, 229 IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers, 230 idefloppy_retry_pc, NULL, ide_io_buffers); 231} 232 233/* 234 * What we have here is a classic case of a top half / bottom half interrupt 235 * service routine. In interrupt mode, the device sends an interrupt to signal 236 * that it is ready to receive a packet. However, we need to delay about 2-3 237 * ticks before issuing the packet or we gets in trouble. 238 */ 239static int idefloppy_transfer_pc(ide_drive_t *drive) 240{ 241 idefloppy_floppy_t *floppy = drive->driver_data; 242 243 /* Send the actual packet */ 244 drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12); 245 246 /* Timeout for the packet command */ 247 return IDEFLOPPY_WAIT_CMD; 248} 249 250 251/* 252 * Called as an interrupt (or directly). When the device says it's ready for a 253 * packet, we schedule the packet transfer to occur about 2-3 ticks later in 254 * transfer_pc. 255 */ 256static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive) 257{ 258 idefloppy_floppy_t *floppy = drive->driver_data; 259 struct ide_atapi_pc *pc = floppy->pc; 260 ide_expiry_t *expiry; 261 unsigned int timeout; 262 263 /* 264 * The following delay solves a problem with ATAPI Zip 100 drives 265 * where the Busy flag was apparently being deasserted before the 266 * unit was ready to receive data. This was happening on a 267 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 268 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 269 * used until after the packet is moved in about 50 msec. 270 */ 271 if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { 272 timeout = floppy->ticks; 273 expiry = &idefloppy_transfer_pc; 274 } else { 275 timeout = IDEFLOPPY_WAIT_CMD; 276 expiry = NULL; 277 } 278 279 return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry); 280} 281 282static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 283 struct ide_atapi_pc *pc) 284{ 285 /* supress error messages resulting from Medium not present */ 286 if (floppy->sense_key == 0x02 && 287 floppy->asc == 0x3a && 288 floppy->ascq == 0x00) 289 return; 290 291 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " 292 "asc = %2x, ascq = %2x\n", 293 floppy->drive->name, pc->c[0], floppy->sense_key, 294 floppy->asc, floppy->ascq); 295 296} 297 298static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, 299 struct ide_atapi_pc *pc) 300{ 301 idefloppy_floppy_t *floppy = drive->driver_data; 302 303 if (floppy->failed_pc == NULL && 304 pc->c[0] != GPCMD_REQUEST_SENSE) 305 floppy->failed_pc = pc; 306 /* Set the current packet command */ 307 floppy->pc = pc; 308 309 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { 310 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) 311 ide_floppy_report_error(floppy, pc); 312 /* Giving up */ 313 pc->error = IDEFLOPPY_ERROR_GENERAL; 314 315 floppy->failed_pc = NULL; 316 drive->pc_callback(drive); 317 return ide_stopped; 318 } 319 320 debug_log("Retry number - %d\n", pc->retries); 321 322 pc->retries++; 323 324 return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer, 325 IDEFLOPPY_WAIT_CMD, NULL); 326} 327 328void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) 329{ 330 ide_init_pc(pc); 331 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 332 pc->c[7] = 255; 333 pc->c[8] = 255; 334 pc->req_xfer = 255; 335} 336 337/* A mode sense command is used to "sense" floppy parameters. */ 338void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code) 339{ 340 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 341 342 ide_init_pc(pc); 343 pc->c[0] = GPCMD_MODE_SENSE_10; 344 pc->c[1] = 0; 345 pc->c[2] = page_code; 346 347 switch (page_code) { 348 case IDEFLOPPY_CAPABILITIES_PAGE: 349 length += 12; 350 break; 351 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 352 length += 32; 353 break; 354 default: 355 printk(KERN_ERR "ide-floppy: unsupported page code " 356 "in create_mode_sense_cmd\n"); 357 } 358 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 359 pc->req_xfer = length; 360} 361 362static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, 363 struct ide_atapi_pc *pc, struct request *rq, 364 unsigned long sector) 365{ 366 int block = sector / floppy->bs_factor; 367 int blocks = rq->nr_sectors / floppy->bs_factor; 368 int cmd = rq_data_dir(rq); 369 370 debug_log("create_rw10_cmd: block == %d, blocks == %d\n", 371 block, blocks); 372 373 ide_init_pc(pc); 374 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 375 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 376 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 377 378 memcpy(rq->cmd, pc->c, 12); 379 380 pc->rq = rq; 381 pc->b_count = 0; 382 if (rq->cmd_flags & REQ_RW) 383 pc->flags |= PC_FLAG_WRITING; 384 pc->buf = NULL; 385 pc->req_xfer = pc->buf_size = blocks * floppy->block_size; 386 pc->flags |= PC_FLAG_DMA_OK; 387} 388 389static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, 390 struct ide_atapi_pc *pc, struct request *rq) 391{ 392 ide_init_pc(pc); 393 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 394 pc->rq = rq; 395 pc->b_count = 0; 396 if (rq->data_len && rq_data_dir(rq) == WRITE) 397 pc->flags |= PC_FLAG_WRITING; 398 pc->buf = rq->data; 399 if (rq->bio) 400 pc->flags |= PC_FLAG_DMA_OK; 401 /* 402 * possibly problematic, doesn't look like ide-floppy correctly 403 * handled scattered requests if dma fails... 404 */ 405 pc->req_xfer = pc->buf_size = rq->data_len; 406} 407 408static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, 409 struct request *rq, sector_t block_s) 410{ 411 idefloppy_floppy_t *floppy = drive->driver_data; 412 ide_hwif_t *hwif = drive->hwif; 413 struct ide_atapi_pc *pc; 414 unsigned long block = (unsigned long)block_s; 415 416 debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n", 417 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?", 418 rq->cmd[0], rq->cmd_type, rq->errors); 419 420 debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n", 421 __func__, (long)rq->sector, rq->nr_sectors, 422 rq->current_nr_sectors); 423 424 if (rq->errors >= ERROR_MAX) { 425 if (floppy->failed_pc) 426 ide_floppy_report_error(floppy, floppy->failed_pc); 427 else 428 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 429 drive->name); 430 idefloppy_end_request(drive, 0, 0); 431 return ide_stopped; 432 } 433 if (blk_fs_request(rq)) { 434 if (((long)rq->sector % floppy->bs_factor) || 435 (rq->nr_sectors % floppy->bs_factor)) { 436 printk(KERN_ERR "%s: unsupported r/w request size\n", 437 drive->name); 438 idefloppy_end_request(drive, 0, 0); 439 return ide_stopped; 440 } 441 pc = &floppy->queued_pc; 442 idefloppy_create_rw_cmd(floppy, pc, rq, block); 443 } else if (blk_special_request(rq)) { 444 pc = (struct ide_atapi_pc *) rq->buffer; 445 } else if (blk_pc_request(rq)) { 446 pc = &floppy->queued_pc; 447 idefloppy_blockpc_cmd(floppy, pc, rq); 448 } else { 449 blk_dump_rq_flags(rq, 450 "ide-floppy: unsupported command in queue"); 451 idefloppy_end_request(drive, 0, 0); 452 return ide_stopped; 453 } 454 455 ide_init_sg_cmd(drive, rq); 456 ide_map_sg(drive, rq); 457 458 pc->sg = hwif->sg_table; 459 pc->sg_cnt = hwif->sg_nents; 460 461 pc->rq = rq; 462 463 return idefloppy_issue_pc(drive, pc); 464} 465 466/* 467 * Look at the flexible disk page parameters. We ignore the CHS capacity 468 * parameters and use the LBA parameters instead. 469 */ 470static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 471{ 472 idefloppy_floppy_t *floppy = drive->driver_data; 473 struct gendisk *disk = floppy->disk; 474 struct ide_atapi_pc pc; 475 u8 *page; 476 int capacity, lba_capacity; 477 u16 transfer_rate, sector_size, cyls, rpm; 478 u8 heads, sectors; 479 480 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE); 481 482 if (ide_queue_pc_tail(drive, disk, &pc)) { 483 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 484 " parameters\n"); 485 return 1; 486 } 487 488 if (pc.buf[3] & 0x80) 489 drive->atapi_flags |= IDE_AFLAG_WP; 490 else 491 drive->atapi_flags &= ~IDE_AFLAG_WP; 492 493 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP)); 494 495 page = &pc.buf[8]; 496 497 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]); 498 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]); 499 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]); 500 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]); 501 heads = pc.buf[8 + 4]; 502 sectors = pc.buf[8 + 5]; 503 504 capacity = cyls * heads * sectors * sector_size; 505 506 if (memcmp(page, &floppy->flexible_disk_page, 32)) 507 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 508 "%d sector size, %d rpm\n", 509 drive->name, capacity / 1024, cyls, heads, 510 sectors, transfer_rate / 8, sector_size, rpm); 511 512 memcpy(&floppy->flexible_disk_page, page, 32); 513 drive->bios_cyl = cyls; 514 drive->bios_head = heads; 515 drive->bios_sect = sectors; 516 lba_capacity = floppy->blocks * floppy->block_size; 517 518 if (capacity < lba_capacity) { 519 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 520 "bytes, but the drive only handles %d\n", 521 drive->name, lba_capacity, capacity); 522 floppy->blocks = floppy->block_size ? 523 capacity / floppy->block_size : 0; 524 } 525 return 0; 526} 527 528/* 529 * Determine if a media is present in the floppy drive, and if so, its LBA 530 * capacity. 531 */ 532static int ide_floppy_get_capacity(ide_drive_t *drive) 533{ 534 idefloppy_floppy_t *floppy = drive->driver_data; 535 struct gendisk *disk = floppy->disk; 536 struct ide_atapi_pc pc; 537 u8 *cap_desc; 538 u8 header_len, desc_cnt; 539 int i, rc = 1, blocks, length; 540 541 drive->bios_cyl = 0; 542 drive->bios_head = drive->bios_sect = 0; 543 floppy->blocks = 0; 544 floppy->bs_factor = 1; 545 set_capacity(floppy->disk, 0); 546 547 ide_floppy_create_read_capacity_cmd(&pc); 548 if (ide_queue_pc_tail(drive, disk, &pc)) { 549 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 550 return 1; 551 } 552 header_len = pc.buf[3]; 553 cap_desc = &pc.buf[4]; 554 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 555 556 for (i = 0; i < desc_cnt; i++) { 557 unsigned int desc_start = 4 + i*8; 558 559 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]); 560 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]); 561 562 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 563 i, blocks * length / 1024, blocks, length); 564 565 if (i) 566 continue; 567 /* 568 * the code below is valid only for the 1st descriptor, ie i=0 569 */ 570 571 switch (pc.buf[desc_start + 4] & 0x03) { 572 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 573 case CAPACITY_UNFORMATTED: 574 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) 575 /* 576 * If it is not a clik drive, break out 577 * (maintains previous driver behaviour) 578 */ 579 break; 580 case CAPACITY_CURRENT: 581 /* Normal Zip/LS-120 disks */ 582 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 583 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 584 "sector size\n", drive->name, 585 blocks * length / 1024, blocks, length); 586 memcpy(&floppy->cap_desc, cap_desc, 8); 587 588 if (!length || length % 512) { 589 printk(KERN_NOTICE "%s: %d bytes block size " 590 "not supported\n", drive->name, length); 591 } else { 592 floppy->blocks = blocks; 593 floppy->block_size = length; 594 floppy->bs_factor = length / 512; 595 if (floppy->bs_factor != 1) 596 printk(KERN_NOTICE "%s: warning: non " 597 "512 bytes block size not " 598 "fully supported\n", 599 drive->name); 600 rc = 0; 601 } 602 break; 603 case CAPACITY_NO_CARTRIDGE: 604 /* 605 * This is a KERN_ERR so it appears on screen 606 * for the user to see 607 */ 608 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 609 break; 610 case CAPACITY_INVALID: 611 printk(KERN_ERR "%s: Invalid capacity for disk " 612 "in drive\n", drive->name); 613 break; 614 } 615 debug_log("Descriptor 0 Code: %d\n", 616 pc.buf[desc_start + 4] & 0x03); 617 } 618 619 /* Clik! disk does not support get_flexible_disk_page */ 620 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) 621 (void) ide_floppy_get_flexible_disk_page(drive); 622 623 set_capacity(disk, floppy->blocks * floppy->bs_factor); 624 625 return rc; 626} 627 628static sector_t idefloppy_capacity(ide_drive_t *drive) 629{ 630 idefloppy_floppy_t *floppy = drive->driver_data; 631 unsigned long capacity = floppy->blocks * floppy->bs_factor; 632 633 return capacity; 634} 635 636#ifdef CONFIG_IDE_PROC_FS 637ide_devset_rw(bios_cyl, 0, 1023, bios_cyl); 638ide_devset_rw(bios_head, 0, 255, bios_head); 639ide_devset_rw(bios_sect, 0, 63, bios_sect); 640 641static int get_ticks(ide_drive_t *drive) 642{ 643 idefloppy_floppy_t *floppy = drive->driver_data; 644 return floppy->ticks; 645} 646 647static int set_ticks(ide_drive_t *drive, int arg) 648{ 649 idefloppy_floppy_t *floppy = drive->driver_data; 650 floppy->ticks = arg; 651 return 0; 652} 653 654IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks); 655 656static const struct ide_devset *idefloppy_settings[] = { 657 &ide_devset_bios_cyl, 658 &ide_devset_bios_head, 659 &ide_devset_bios_sect, 660 &ide_devset_ticks, 661 NULL 662}; 663#endif 664 665static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) 666{ 667 u16 *id = drive->id; 668 u8 gcw[2]; 669 670 *((u16 *)&gcw) = id[ATA_ID_CONFIG]; 671 672 drive->pc_callback = ide_floppy_callback; 673 674 if (((gcw[0] & 0x60) >> 5) == 1) 675 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 676 /* 677 * We used to check revisions here. At this point however I'm giving up. 678 * Just assume they are all broken, its easier. 679 * 680 * The actual reason for the workarounds was likely a driver bug after 681 * all rather than a firmware bug, and the workaround below used to hide 682 * it. It should be fixed as of version 1.9, but to be on the safe side 683 * we'll leave the limitation below for the 2.2.x tree. 684 */ 685 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) { 686 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE; 687 /* This value will be visible in the /proc/ide/hdx/settings */ 688 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 689 blk_queue_max_sectors(drive->queue, 64); 690 } 691 692 /* 693 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes 694 * nasty clicking noises without it, so please don't remove this. 695 */ 696 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) { 697 blk_queue_max_sectors(drive->queue, 64); 698 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE; 699 /* IOMEGA Clik! drives do not support lock/unlock commands */ 700 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK; 701 } 702 703 (void) ide_floppy_get_capacity(drive); 704 705 ide_proc_register_driver(drive, floppy->driver); 706} 707 708static void ide_floppy_remove(ide_drive_t *drive) 709{ 710 idefloppy_floppy_t *floppy = drive->driver_data; 711 struct gendisk *g = floppy->disk; 712 713 ide_proc_unregister_driver(drive, floppy->driver); 714 715 del_gendisk(g); 716 717 ide_floppy_put(floppy); 718} 719 720static void idefloppy_cleanup_obj(struct kref *kref) 721{ 722 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 723 ide_drive_t *drive = floppy->drive; 724 struct gendisk *g = floppy->disk; 725 726 drive->driver_data = NULL; 727 g->private_data = NULL; 728 put_disk(g); 729 kfree(floppy); 730} 731 732#ifdef CONFIG_IDE_PROC_FS 733static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, 734 int count, int *eof, void *data) 735{ 736 ide_drive_t*drive = (ide_drive_t *)data; 737 int len; 738 739 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); 740 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 741} 742 743static ide_proc_entry_t idefloppy_proc[] = { 744 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 745 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 746 { NULL, 0, NULL, NULL } 747}; 748#endif /* CONFIG_IDE_PROC_FS */ 749 750static int ide_floppy_probe(ide_drive_t *); 751 752static ide_driver_t idefloppy_driver = { 753 .gen_driver = { 754 .owner = THIS_MODULE, 755 .name = "ide-floppy", 756 .bus = &ide_bus_type, 757 }, 758 .probe = ide_floppy_probe, 759 .remove = ide_floppy_remove, 760 .version = IDEFLOPPY_VERSION, 761 .media = ide_floppy, 762 .do_request = idefloppy_do_request, 763 .end_request = idefloppy_end_request, 764 .error = __ide_error, 765#ifdef CONFIG_IDE_PROC_FS 766 .proc = idefloppy_proc, 767 .settings = idefloppy_settings, 768#endif 769}; 770 771static int idefloppy_open(struct inode *inode, struct file *filp) 772{ 773 struct gendisk *disk = inode->i_bdev->bd_disk; 774 struct ide_floppy_obj *floppy; 775 ide_drive_t *drive; 776 int ret = 0; 777 778 debug_log("Reached %s\n", __func__); 779 780 floppy = ide_floppy_get(disk); 781 if (!floppy) 782 return -ENXIO; 783 784 drive = floppy->drive; 785 786 floppy->openers++; 787 788 if (floppy->openers == 1) { 789 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 790 /* Just in case */ 791 792 if (ide_do_test_unit_ready(drive, disk)) 793 ide_do_start_stop(drive, disk, 1); 794 795 if (ide_floppy_get_capacity(drive) 796 && (filp->f_flags & O_NDELAY) == 0 797 /* 798 * Allow O_NDELAY to open a drive without a disk, or with an 799 * unreadable disk, so that we can get the format capacity 800 * of the drive or begin the format - Sam 801 */ 802 ) { 803 ret = -EIO; 804 goto out_put_floppy; 805 } 806 807 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) { 808 ret = -EROFS; 809 goto out_put_floppy; 810 } 811 812 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED; 813 ide_set_media_lock(drive, disk, 1); 814 check_disk_change(inode->i_bdev); 815 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) { 816 ret = -EBUSY; 817 goto out_put_floppy; 818 } 819 return 0; 820 821out_put_floppy: 822 floppy->openers--; 823 ide_floppy_put(floppy); 824 return ret; 825} 826 827static int idefloppy_release(struct inode *inode, struct file *filp) 828{ 829 struct gendisk *disk = inode->i_bdev->bd_disk; 830 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 831 ide_drive_t *drive = floppy->drive; 832 833 debug_log("Reached %s\n", __func__); 834 835 if (floppy->openers == 1) { 836 ide_set_media_lock(drive, disk, 0); 837 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 838 } 839 840 floppy->openers--; 841 842 ide_floppy_put(floppy); 843 844 return 0; 845} 846 847static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 848{ 849 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 850 ide_drive_t *drive = floppy->drive; 851 852 geo->heads = drive->bios_head; 853 geo->sectors = drive->bios_sect; 854 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 855 return 0; 856} 857 858static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, 859 unsigned long arg, unsigned int cmd) 860{ 861 idefloppy_floppy_t *floppy = drive->driver_data; 862 struct gendisk *disk = floppy->disk; 863 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0; 864 865 if (floppy->openers > 1) 866 return -EBUSY; 867 868 ide_set_media_lock(drive, disk, prevent); 869 870 if (cmd == CDROMEJECT) 871 ide_do_start_stop(drive, disk, 2); 872 873 return 0; 874} 875 876static int idefloppy_ioctl(struct inode *inode, struct file *file, 877 unsigned int cmd, unsigned long arg) 878{ 879 struct block_device *bdev = inode->i_bdev; 880 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 881 ide_drive_t *drive = floppy->drive; 882 struct ide_atapi_pc pc; 883 void __user *argp = (void __user *)arg; 884 int err; 885 886 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) 887 return ide_floppy_lockdoor(drive, &pc, arg, cmd); 888 889 err = ide_floppy_format_ioctl(drive, file, cmd, argp); 890 if (err != -ENOTTY) 891 return err; 892 893 /* 894 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 895 * and CDROM_SEND_PACKET (legacy) ioctls 896 */ 897 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 898 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 899 bdev->bd_disk, cmd, argp); 900 901 if (err == -ENOTTY) 902 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 903 904 return err; 905} 906 907static int idefloppy_media_changed(struct gendisk *disk) 908{ 909 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 910 ide_drive_t *drive = floppy->drive; 911 int ret; 912 913 /* do not scan partitions twice if this is a removable device */ 914 if (drive->attach) { 915 drive->attach = 0; 916 return 0; 917 } 918 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED); 919 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED; 920 return ret; 921} 922 923static int idefloppy_revalidate_disk(struct gendisk *disk) 924{ 925 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 926 set_capacity(disk, idefloppy_capacity(floppy->drive)); 927 return 0; 928} 929 930static struct block_device_operations idefloppy_ops = { 931 .owner = THIS_MODULE, 932 .open = idefloppy_open, 933 .release = idefloppy_release, 934 .ioctl = idefloppy_ioctl, 935 .getgeo = idefloppy_getgeo, 936 .media_changed = idefloppy_media_changed, 937 .revalidate_disk = idefloppy_revalidate_disk 938}; 939 940static int ide_floppy_probe(ide_drive_t *drive) 941{ 942 idefloppy_floppy_t *floppy; 943 struct gendisk *g; 944 945 if (!strstr("ide-floppy", drive->driver_req)) 946 goto failed; 947 948 if (drive->media != ide_floppy) 949 goto failed; 950 951 if (!ide_check_atapi_device(drive, DRV_NAME)) { 952 printk(KERN_ERR "ide-floppy: %s: not supported by this version" 953 " of ide-floppy\n", drive->name); 954 goto failed; 955 } 956 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); 957 if (!floppy) { 958 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy" 959 " structure\n", drive->name); 960 goto failed; 961 } 962 963 g = alloc_disk(1 << PARTN_BITS); 964 if (!g) 965 goto out_free_floppy; 966 967 ide_init_disk(g, drive); 968 969 kref_init(&floppy->kref); 970 971 floppy->drive = drive; 972 floppy->driver = &idefloppy_driver; 973 floppy->disk = g; 974 975 g->private_data = &floppy->driver; 976 977 drive->driver_data = floppy; 978 979 idefloppy_setup(drive, floppy); 980 981 g->minors = 1 << PARTN_BITS; 982 g->driverfs_dev = &drive->gendev; 983 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 984 g->fops = &idefloppy_ops; 985 drive->attach = 1; 986 add_disk(g); 987 return 0; 988 989out_free_floppy: 990 kfree(floppy); 991failed: 992 return -ENODEV; 993} 994 995static void __exit idefloppy_exit(void) 996{ 997 driver_unregister(&idefloppy_driver.gen_driver); 998} 999 1000static int __init idefloppy_init(void) 1001{ 1002 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 1003 return driver_register(&idefloppy_driver.gen_driver); 1004} 1005 1006MODULE_ALIAS("ide:*m-floppy*"); 1007MODULE_ALIAS("ide-floppy"); 1008module_init(idefloppy_init); 1009module_exit(idefloppy_exit); 1010MODULE_LICENSE("GPL"); 1011MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1012 1013