ide-floppy.c revision 67c56364df843fb9e3ed1af014b8fbe4b22ff25d
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 * After each failed packet command we issue a request sense command and retry 66 * the packet command IDEFLOPPY_MAX_PC_RETRIES times. 67 */ 68#define IDEFLOPPY_MAX_PC_RETRIES 3 69 70/* format capacities descriptor codes */ 71#define CAPACITY_INVALID 0x00 72#define CAPACITY_UNFORMATTED 0x01 73#define CAPACITY_CURRENT 0x02 74#define CAPACITY_NO_CARTRIDGE 0x03 75 76#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 77 78/* Error code returned in rq->errors to the higher part of the driver. */ 79#define IDEFLOPPY_ERROR_GENERAL 101 80 81static DEFINE_MUTEX(idefloppy_ref_mutex); 82 83#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 84 85#define ide_floppy_g(disk) \ 86 container_of((disk)->private_data, struct ide_floppy_obj, driver) 87 88static void idefloppy_cleanup_obj(struct kref *); 89 90static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 91{ 92 struct ide_floppy_obj *floppy = NULL; 93 94 mutex_lock(&idefloppy_ref_mutex); 95 floppy = ide_floppy_g(disk); 96 if (floppy) { 97 if (ide_device_get(floppy->drive)) 98 floppy = NULL; 99 else 100 kref_get(&floppy->kref); 101 } 102 mutex_unlock(&idefloppy_ref_mutex); 103 return floppy; 104} 105 106static void ide_floppy_put(struct ide_floppy_obj *floppy) 107{ 108 ide_drive_t *drive = floppy->drive; 109 110 mutex_lock(&idefloppy_ref_mutex); 111 kref_put(&floppy->kref, idefloppy_cleanup_obj); 112 ide_device_put(drive); 113 mutex_unlock(&idefloppy_ref_mutex); 114} 115 116/* 117 * Used to finish servicing a request. For read/write requests, we will call 118 * ide_end_request to pass to the next buffer. 119 */ 120static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) 121{ 122 idefloppy_floppy_t *floppy = drive->driver_data; 123 struct request *rq = HWGROUP(drive)->rq; 124 int error; 125 126 debug_log("Reached %s\n", __func__); 127 128 switch (uptodate) { 129 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 130 case 1: error = 0; break; 131 default: error = uptodate; 132 } 133 if (error) 134 floppy->failed_pc = NULL; 135 /* Why does this happen? */ 136 if (!rq) 137 return 0; 138 if (!blk_special_request(rq)) { 139 /* our real local end request function */ 140 ide_end_request(drive, uptodate, nsecs); 141 return 0; 142 } 143 rq->errors = error; 144 /* fixme: need to move this local also */ 145 ide_end_drive_cmd(drive, 0, 0); 146 return 0; 147} 148 149static void idefloppy_update_buffers(ide_drive_t *drive, 150 struct ide_atapi_pc *pc) 151{ 152 struct request *rq = pc->rq; 153 struct bio *bio = rq->bio; 154 155 while ((bio = rq->bio) != NULL) 156 idefloppy_end_request(drive, 1, 0); 157} 158 159static void ide_floppy_callback(ide_drive_t *drive, int dsc) 160{ 161 idefloppy_floppy_t *floppy = drive->driver_data; 162 struct ide_atapi_pc *pc = drive->pc; 163 int uptodate = pc->error ? 0 : 1; 164 165 debug_log("Reached %s\n", __func__); 166 167 if (floppy->failed_pc == pc) 168 floppy->failed_pc = NULL; 169 170 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 || 171 (pc->rq && blk_pc_request(pc->rq))) 172 uptodate = 1; /* FIXME */ 173 else if (pc->c[0] == GPCMD_REQUEST_SENSE) { 174 u8 *buf = pc->buf; 175 176 if (!pc->error) { 177 floppy->sense_key = buf[2] & 0x0F; 178 floppy->asc = buf[12]; 179 floppy->ascq = buf[13]; 180 floppy->progress_indication = buf[15] & 0x80 ? 181 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 182 183 if (floppy->failed_pc) 184 debug_log("pc = %x, ", floppy->failed_pc->c[0]); 185 186 debug_log("sense key = %x, asc = %x, ascq = %x\n", 187 floppy->sense_key, floppy->asc, floppy->ascq); 188 } else 189 printk(KERN_ERR "Error in REQUEST SENSE itself - " 190 "Aborting request!\n"); 191 } 192 193 idefloppy_end_request(drive, uptodate, 0); 194} 195 196void ide_floppy_create_request_sense_cmd(struct ide_atapi_pc *pc) 197{ 198 ide_init_pc(pc); 199 pc->c[0] = GPCMD_REQUEST_SENSE; 200 pc->c[4] = 255; 201 pc->req_xfer = 18; 202} 203 204/* 205 * Called when an error was detected during the last packet command. We queue a 206 * request sense packet command in the head of the request list. 207 */ 208static void idefloppy_retry_pc(ide_drive_t *drive) 209{ 210 struct ide_floppy_obj *floppy = drive->driver_data; 211 struct request *rq = &drive->request_sense_rq; 212 struct ide_atapi_pc *pc = &drive->request_sense_pc; 213 214 (void)ide_read_error(drive); 215 ide_floppy_create_request_sense_cmd(pc); 216 ide_queue_pc_head(drive, floppy->disk, pc, rq); 217} 218 219/* The usual interrupt handler called during a packet command. */ 220static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) 221{ 222 return ide_pc_intr(drive, idefloppy_pc_intr, idefloppy_update_buffers, 223 idefloppy_retry_pc, ide_io_buffers); 224} 225 226/* 227 * What we have here is a classic case of a top half / bottom half interrupt 228 * service routine. In interrupt mode, the device sends an interrupt to signal 229 * that it is ready to receive a packet. However, we need to delay about 2-3 230 * ticks before issuing the packet or we gets in trouble. 231 */ 232static int idefloppy_transfer_pc(ide_drive_t *drive) 233{ 234 /* Send the actual packet */ 235 drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12); 236 237 /* Timeout for the packet command */ 238 return WAIT_FLOPPY_CMD; 239} 240 241/* 242 * Called as an interrupt (or directly). When the device says it's ready for a 243 * packet, we schedule the packet transfer to occur about 2-3 ticks later in 244 * transfer_pc. 245 */ 246static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive) 247{ 248 idefloppy_floppy_t *floppy = drive->driver_data; 249 ide_expiry_t *expiry; 250 unsigned int timeout; 251 252 /* 253 * The following delay solves a problem with ATAPI Zip 100 drives 254 * where the Busy flag was apparently being deasserted before the 255 * unit was ready to receive data. This was happening on a 256 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 257 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 258 * used until after the packet is moved in about 50 msec. 259 */ 260 if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { 261 timeout = floppy->ticks; 262 expiry = &idefloppy_transfer_pc; 263 } else { 264 timeout = WAIT_FLOPPY_CMD; 265 expiry = NULL; 266 } 267 268 return ide_transfer_pc(drive, idefloppy_pc_intr, timeout, expiry); 269} 270 271static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 272 struct ide_atapi_pc *pc) 273{ 274 /* supress error messages resulting from Medium not present */ 275 if (floppy->sense_key == 0x02 && 276 floppy->asc == 0x3a && 277 floppy->ascq == 0x00) 278 return; 279 280 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " 281 "asc = %2x, ascq = %2x\n", 282 floppy->drive->name, pc->c[0], floppy->sense_key, 283 floppy->asc, floppy->ascq); 284 285} 286 287static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, 288 struct ide_atapi_pc *pc) 289{ 290 idefloppy_floppy_t *floppy = drive->driver_data; 291 292 if (floppy->failed_pc == NULL && 293 pc->c[0] != GPCMD_REQUEST_SENSE) 294 floppy->failed_pc = pc; 295 296 /* Set the current packet command */ 297 drive->pc = pc; 298 299 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { 300 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) 301 ide_floppy_report_error(floppy, pc); 302 /* Giving up */ 303 pc->error = IDEFLOPPY_ERROR_GENERAL; 304 305 floppy->failed_pc = NULL; 306 drive->pc_callback(drive, 0); 307 return ide_stopped; 308 } 309 310 debug_log("Retry number - %d\n", pc->retries); 311 312 pc->retries++; 313 314 return ide_issue_pc(drive, idefloppy_start_pc_transfer, 315 WAIT_FLOPPY_CMD, NULL); 316} 317 318void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) 319{ 320 ide_init_pc(pc); 321 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 322 pc->c[7] = 255; 323 pc->c[8] = 255; 324 pc->req_xfer = 255; 325} 326 327/* A mode sense command is used to "sense" floppy parameters. */ 328void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code) 329{ 330 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 331 332 ide_init_pc(pc); 333 pc->c[0] = GPCMD_MODE_SENSE_10; 334 pc->c[1] = 0; 335 pc->c[2] = page_code; 336 337 switch (page_code) { 338 case IDEFLOPPY_CAPABILITIES_PAGE: 339 length += 12; 340 break; 341 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 342 length += 32; 343 break; 344 default: 345 printk(KERN_ERR "ide-floppy: unsupported page code " 346 "in create_mode_sense_cmd\n"); 347 } 348 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 349 pc->req_xfer = length; 350} 351 352static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, 353 struct ide_atapi_pc *pc, struct request *rq, 354 unsigned long sector) 355{ 356 int block = sector / floppy->bs_factor; 357 int blocks = rq->nr_sectors / floppy->bs_factor; 358 int cmd = rq_data_dir(rq); 359 360 debug_log("create_rw10_cmd: block == %d, blocks == %d\n", 361 block, blocks); 362 363 ide_init_pc(pc); 364 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 365 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 366 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 367 368 memcpy(rq->cmd, pc->c, 12); 369 370 pc->rq = rq; 371 pc->b_count = 0; 372 if (rq->cmd_flags & REQ_RW) 373 pc->flags |= PC_FLAG_WRITING; 374 pc->buf = NULL; 375 pc->req_xfer = pc->buf_size = blocks * floppy->block_size; 376 pc->flags |= PC_FLAG_DMA_OK; 377} 378 379static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, 380 struct ide_atapi_pc *pc, struct request *rq) 381{ 382 ide_init_pc(pc); 383 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 384 pc->rq = rq; 385 pc->b_count = 0; 386 if (rq->data_len && rq_data_dir(rq) == WRITE) 387 pc->flags |= PC_FLAG_WRITING; 388 pc->buf = rq->data; 389 if (rq->bio) 390 pc->flags |= PC_FLAG_DMA_OK; 391 /* 392 * possibly problematic, doesn't look like ide-floppy correctly 393 * handled scattered requests if dma fails... 394 */ 395 pc->req_xfer = pc->buf_size = rq->data_len; 396} 397 398static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, 399 struct request *rq, sector_t block_s) 400{ 401 idefloppy_floppy_t *floppy = drive->driver_data; 402 ide_hwif_t *hwif = drive->hwif; 403 struct ide_atapi_pc *pc; 404 unsigned long block = (unsigned long)block_s; 405 406 debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n", 407 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?", 408 rq->cmd[0], rq->cmd_type, rq->errors); 409 410 debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n", 411 __func__, (long)rq->sector, rq->nr_sectors, 412 rq->current_nr_sectors); 413 414 if (rq->errors >= ERROR_MAX) { 415 if (floppy->failed_pc) 416 ide_floppy_report_error(floppy, floppy->failed_pc); 417 else 418 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 419 drive->name); 420 idefloppy_end_request(drive, 0, 0); 421 return ide_stopped; 422 } 423 if (blk_fs_request(rq)) { 424 if (((long)rq->sector % floppy->bs_factor) || 425 (rq->nr_sectors % floppy->bs_factor)) { 426 printk(KERN_ERR "%s: unsupported r/w request size\n", 427 drive->name); 428 idefloppy_end_request(drive, 0, 0); 429 return ide_stopped; 430 } 431 pc = &floppy->queued_pc; 432 idefloppy_create_rw_cmd(floppy, pc, rq, block); 433 } else if (blk_special_request(rq)) { 434 pc = (struct ide_atapi_pc *) rq->buffer; 435 } else if (blk_pc_request(rq)) { 436 pc = &floppy->queued_pc; 437 idefloppy_blockpc_cmd(floppy, pc, rq); 438 } else { 439 blk_dump_rq_flags(rq, 440 "ide-floppy: unsupported command in queue"); 441 idefloppy_end_request(drive, 0, 0); 442 return ide_stopped; 443 } 444 445 ide_init_sg_cmd(drive, rq); 446 ide_map_sg(drive, rq); 447 448 pc->sg = hwif->sg_table; 449 pc->sg_cnt = hwif->sg_nents; 450 451 pc->rq = rq; 452 453 return idefloppy_issue_pc(drive, pc); 454} 455 456/* 457 * Look at the flexible disk page parameters. We ignore the CHS capacity 458 * parameters and use the LBA parameters instead. 459 */ 460static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 461{ 462 idefloppy_floppy_t *floppy = drive->driver_data; 463 struct gendisk *disk = floppy->disk; 464 struct ide_atapi_pc pc; 465 u8 *page; 466 int capacity, lba_capacity; 467 u16 transfer_rate, sector_size, cyls, rpm; 468 u8 heads, sectors; 469 470 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE); 471 472 if (ide_queue_pc_tail(drive, disk, &pc)) { 473 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 474 " parameters\n"); 475 return 1; 476 } 477 478 if (pc.buf[3] & 0x80) 479 drive->atapi_flags |= IDE_AFLAG_WP; 480 else 481 drive->atapi_flags &= ~IDE_AFLAG_WP; 482 483 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP)); 484 485 page = &pc.buf[8]; 486 487 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]); 488 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]); 489 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]); 490 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]); 491 heads = pc.buf[8 + 4]; 492 sectors = pc.buf[8 + 5]; 493 494 capacity = cyls * heads * sectors * sector_size; 495 496 if (memcmp(page, &floppy->flexible_disk_page, 32)) 497 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 498 "%d sector size, %d rpm\n", 499 drive->name, capacity / 1024, cyls, heads, 500 sectors, transfer_rate / 8, sector_size, rpm); 501 502 memcpy(&floppy->flexible_disk_page, page, 32); 503 drive->bios_cyl = cyls; 504 drive->bios_head = heads; 505 drive->bios_sect = sectors; 506 lba_capacity = floppy->blocks * floppy->block_size; 507 508 if (capacity < lba_capacity) { 509 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 510 "bytes, but the drive only handles %d\n", 511 drive->name, lba_capacity, capacity); 512 floppy->blocks = floppy->block_size ? 513 capacity / floppy->block_size : 0; 514 } 515 return 0; 516} 517 518/* 519 * Determine if a media is present in the floppy drive, and if so, its LBA 520 * capacity. 521 */ 522static int ide_floppy_get_capacity(ide_drive_t *drive) 523{ 524 idefloppy_floppy_t *floppy = drive->driver_data; 525 struct gendisk *disk = floppy->disk; 526 struct ide_atapi_pc pc; 527 u8 *cap_desc; 528 u8 header_len, desc_cnt; 529 int i, rc = 1, blocks, length; 530 531 drive->bios_cyl = 0; 532 drive->bios_head = drive->bios_sect = 0; 533 floppy->blocks = 0; 534 floppy->bs_factor = 1; 535 set_capacity(floppy->disk, 0); 536 537 ide_floppy_create_read_capacity_cmd(&pc); 538 if (ide_queue_pc_tail(drive, disk, &pc)) { 539 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 540 return 1; 541 } 542 header_len = pc.buf[3]; 543 cap_desc = &pc.buf[4]; 544 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 545 546 for (i = 0; i < desc_cnt; i++) { 547 unsigned int desc_start = 4 + i*8; 548 549 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]); 550 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]); 551 552 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 553 i, blocks * length / 1024, blocks, length); 554 555 if (i) 556 continue; 557 /* 558 * the code below is valid only for the 1st descriptor, ie i=0 559 */ 560 561 switch (pc.buf[desc_start + 4] & 0x03) { 562 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 563 case CAPACITY_UNFORMATTED: 564 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) 565 /* 566 * If it is not a clik drive, break out 567 * (maintains previous driver behaviour) 568 */ 569 break; 570 case CAPACITY_CURRENT: 571 /* Normal Zip/LS-120 disks */ 572 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 573 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 574 "sector size\n", drive->name, 575 blocks * length / 1024, blocks, length); 576 memcpy(&floppy->cap_desc, cap_desc, 8); 577 578 if (!length || length % 512) { 579 printk(KERN_NOTICE "%s: %d bytes block size " 580 "not supported\n", drive->name, length); 581 } else { 582 floppy->blocks = blocks; 583 floppy->block_size = length; 584 floppy->bs_factor = length / 512; 585 if (floppy->bs_factor != 1) 586 printk(KERN_NOTICE "%s: warning: non " 587 "512 bytes block size not " 588 "fully supported\n", 589 drive->name); 590 rc = 0; 591 } 592 break; 593 case CAPACITY_NO_CARTRIDGE: 594 /* 595 * This is a KERN_ERR so it appears on screen 596 * for the user to see 597 */ 598 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 599 break; 600 case CAPACITY_INVALID: 601 printk(KERN_ERR "%s: Invalid capacity for disk " 602 "in drive\n", drive->name); 603 break; 604 } 605 debug_log("Descriptor 0 Code: %d\n", 606 pc.buf[desc_start + 4] & 0x03); 607 } 608 609 /* Clik! disk does not support get_flexible_disk_page */ 610 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) 611 (void) ide_floppy_get_flexible_disk_page(drive); 612 613 set_capacity(disk, floppy->blocks * floppy->bs_factor); 614 615 return rc; 616} 617 618static sector_t idefloppy_capacity(ide_drive_t *drive) 619{ 620 idefloppy_floppy_t *floppy = drive->driver_data; 621 unsigned long capacity = floppy->blocks * floppy->bs_factor; 622 623 return capacity; 624} 625 626#ifdef CONFIG_IDE_PROC_FS 627ide_devset_rw_field(bios_cyl, bios_cyl); 628ide_devset_rw_field(bios_head, bios_head); 629ide_devset_rw_field(bios_sect, bios_sect); 630 631static int get_ticks(ide_drive_t *drive) 632{ 633 idefloppy_floppy_t *floppy = drive->driver_data; 634 return floppy->ticks; 635} 636 637static int set_ticks(ide_drive_t *drive, int arg) 638{ 639 idefloppy_floppy_t *floppy = drive->driver_data; 640 floppy->ticks = arg; 641 return 0; 642} 643 644IDE_DEVSET(ticks, DS_SYNC, get_ticks, set_ticks); 645 646static const struct ide_proc_devset idefloppy_settings[] = { 647 IDE_PROC_DEVSET(bios_cyl, 0, 1023), 648 IDE_PROC_DEVSET(bios_head, 0, 255), 649 IDE_PROC_DEVSET(bios_sect, 0, 63), 650 IDE_PROC_DEVSET(ticks, 0, 255), 651 { 0 }, 652}; 653#endif 654 655static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) 656{ 657 u16 *id = drive->id; 658 u8 gcw[2]; 659 660 *((u16 *)&gcw) = id[ATA_ID_CONFIG]; 661 662 drive->pc_callback = ide_floppy_callback; 663 664 if (((gcw[0] & 0x60) >> 5) == 1) 665 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 666 /* 667 * We used to check revisions here. At this point however I'm giving up. 668 * Just assume they are all broken, its easier. 669 * 670 * The actual reason for the workarounds was likely a driver bug after 671 * all rather than a firmware bug, and the workaround below used to hide 672 * it. It should be fixed as of version 1.9, but to be on the safe side 673 * we'll leave the limitation below for the 2.2.x tree. 674 */ 675 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) { 676 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE; 677 /* This value will be visible in the /proc/ide/hdx/settings */ 678 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 679 blk_queue_max_sectors(drive->queue, 64); 680 } 681 682 /* 683 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes 684 * nasty clicking noises without it, so please don't remove this. 685 */ 686 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) { 687 blk_queue_max_sectors(drive->queue, 64); 688 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE; 689 /* IOMEGA Clik! drives do not support lock/unlock commands */ 690 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK; 691 } 692 693 (void) ide_floppy_get_capacity(drive); 694 695 ide_proc_register_driver(drive, floppy->driver); 696} 697 698static void ide_floppy_remove(ide_drive_t *drive) 699{ 700 idefloppy_floppy_t *floppy = drive->driver_data; 701 struct gendisk *g = floppy->disk; 702 703 ide_proc_unregister_driver(drive, floppy->driver); 704 705 del_gendisk(g); 706 707 ide_floppy_put(floppy); 708} 709 710static void idefloppy_cleanup_obj(struct kref *kref) 711{ 712 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 713 ide_drive_t *drive = floppy->drive; 714 struct gendisk *g = floppy->disk; 715 716 drive->driver_data = NULL; 717 g->private_data = NULL; 718 put_disk(g); 719 kfree(floppy); 720} 721 722#ifdef CONFIG_IDE_PROC_FS 723static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, 724 int count, int *eof, void *data) 725{ 726 ide_drive_t*drive = (ide_drive_t *)data; 727 int len; 728 729 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); 730 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 731} 732 733static ide_proc_entry_t idefloppy_proc[] = { 734 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 735 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 736 { NULL, 0, NULL, NULL } 737}; 738#endif /* CONFIG_IDE_PROC_FS */ 739 740static int ide_floppy_probe(ide_drive_t *); 741 742static ide_driver_t idefloppy_driver = { 743 .gen_driver = { 744 .owner = THIS_MODULE, 745 .name = "ide-floppy", 746 .bus = &ide_bus_type, 747 }, 748 .probe = ide_floppy_probe, 749 .remove = ide_floppy_remove, 750 .version = IDEFLOPPY_VERSION, 751 .media = ide_floppy, 752 .do_request = idefloppy_do_request, 753 .end_request = idefloppy_end_request, 754 .error = __ide_error, 755#ifdef CONFIG_IDE_PROC_FS 756 .proc = idefloppy_proc, 757 .settings = idefloppy_settings, 758#endif 759}; 760 761static int idefloppy_open(struct inode *inode, struct file *filp) 762{ 763 struct gendisk *disk = inode->i_bdev->bd_disk; 764 struct ide_floppy_obj *floppy; 765 ide_drive_t *drive; 766 int ret = 0; 767 768 debug_log("Reached %s\n", __func__); 769 770 floppy = ide_floppy_get(disk); 771 if (!floppy) 772 return -ENXIO; 773 774 drive = floppy->drive; 775 776 floppy->openers++; 777 778 if (floppy->openers == 1) { 779 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 780 /* Just in case */ 781 782 if (ide_do_test_unit_ready(drive, disk)) 783 ide_do_start_stop(drive, disk, 1); 784 785 if (ide_floppy_get_capacity(drive) 786 && (filp->f_flags & O_NDELAY) == 0 787 /* 788 * Allow O_NDELAY to open a drive without a disk, or with an 789 * unreadable disk, so that we can get the format capacity 790 * of the drive or begin the format - Sam 791 */ 792 ) { 793 ret = -EIO; 794 goto out_put_floppy; 795 } 796 797 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) { 798 ret = -EROFS; 799 goto out_put_floppy; 800 } 801 802 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED; 803 ide_set_media_lock(drive, disk, 1); 804 check_disk_change(inode->i_bdev); 805 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) { 806 ret = -EBUSY; 807 goto out_put_floppy; 808 } 809 return 0; 810 811out_put_floppy: 812 floppy->openers--; 813 ide_floppy_put(floppy); 814 return ret; 815} 816 817static int idefloppy_release(struct inode *inode, struct file *filp) 818{ 819 struct gendisk *disk = inode->i_bdev->bd_disk; 820 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 821 ide_drive_t *drive = floppy->drive; 822 823 debug_log("Reached %s\n", __func__); 824 825 if (floppy->openers == 1) { 826 ide_set_media_lock(drive, disk, 0); 827 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 828 } 829 830 floppy->openers--; 831 832 ide_floppy_put(floppy); 833 834 return 0; 835} 836 837static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 838{ 839 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 840 ide_drive_t *drive = floppy->drive; 841 842 geo->heads = drive->bios_head; 843 geo->sectors = drive->bios_sect; 844 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 845 return 0; 846} 847 848static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, 849 unsigned long arg, unsigned int cmd) 850{ 851 idefloppy_floppy_t *floppy = drive->driver_data; 852 struct gendisk *disk = floppy->disk; 853 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0; 854 855 if (floppy->openers > 1) 856 return -EBUSY; 857 858 ide_set_media_lock(drive, disk, prevent); 859 860 if (cmd == CDROMEJECT) 861 ide_do_start_stop(drive, disk, 2); 862 863 return 0; 864} 865 866static int idefloppy_ioctl(struct inode *inode, struct file *file, 867 unsigned int cmd, unsigned long arg) 868{ 869 struct block_device *bdev = inode->i_bdev; 870 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 871 ide_drive_t *drive = floppy->drive; 872 struct ide_atapi_pc pc; 873 void __user *argp = (void __user *)arg; 874 int err; 875 876 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) 877 return ide_floppy_lockdoor(drive, &pc, arg, cmd); 878 879 err = ide_floppy_format_ioctl(drive, file, cmd, argp); 880 if (err != -ENOTTY) 881 return err; 882 883 /* 884 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 885 * and CDROM_SEND_PACKET (legacy) ioctls 886 */ 887 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 888 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 889 bdev->bd_disk, cmd, argp); 890 891 if (err == -ENOTTY) 892 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 893 894 return err; 895} 896 897static int idefloppy_media_changed(struct gendisk *disk) 898{ 899 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 900 ide_drive_t *drive = floppy->drive; 901 int ret; 902 903 /* do not scan partitions twice if this is a removable device */ 904 if (drive->attach) { 905 drive->attach = 0; 906 return 0; 907 } 908 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED); 909 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED; 910 return ret; 911} 912 913static int idefloppy_revalidate_disk(struct gendisk *disk) 914{ 915 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 916 set_capacity(disk, idefloppy_capacity(floppy->drive)); 917 return 0; 918} 919 920static struct block_device_operations idefloppy_ops = { 921 .owner = THIS_MODULE, 922 .open = idefloppy_open, 923 .release = idefloppy_release, 924 .ioctl = idefloppy_ioctl, 925 .getgeo = idefloppy_getgeo, 926 .media_changed = idefloppy_media_changed, 927 .revalidate_disk = idefloppy_revalidate_disk 928}; 929 930static int ide_floppy_probe(ide_drive_t *drive) 931{ 932 idefloppy_floppy_t *floppy; 933 struct gendisk *g; 934 935 if (!strstr("ide-floppy", drive->driver_req)) 936 goto failed; 937 938 if (drive->media != ide_floppy) 939 goto failed; 940 941 if (!ide_check_atapi_device(drive, DRV_NAME)) { 942 printk(KERN_ERR "ide-floppy: %s: not supported by this version" 943 " of ide-floppy\n", drive->name); 944 goto failed; 945 } 946 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); 947 if (!floppy) { 948 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy" 949 " structure\n", drive->name); 950 goto failed; 951 } 952 953 g = alloc_disk(1 << PARTN_BITS); 954 if (!g) 955 goto out_free_floppy; 956 957 ide_init_disk(g, drive); 958 959 kref_init(&floppy->kref); 960 961 floppy->drive = drive; 962 floppy->driver = &idefloppy_driver; 963 floppy->disk = g; 964 965 g->private_data = &floppy->driver; 966 967 drive->driver_data = floppy; 968 969 idefloppy_setup(drive, floppy); 970 971 g->minors = 1 << PARTN_BITS; 972 g->driverfs_dev = &drive->gendev; 973 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 974 g->fops = &idefloppy_ops; 975 drive->attach = 1; 976 add_disk(g); 977 return 0; 978 979out_free_floppy: 980 kfree(floppy); 981failed: 982 return -ENODEV; 983} 984 985static void __exit idefloppy_exit(void) 986{ 987 driver_unregister(&idefloppy_driver.gen_driver); 988} 989 990static int __init idefloppy_init(void) 991{ 992 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 993 return driver_register(&idefloppy_driver.gen_driver); 994} 995 996MODULE_ALIAS("ide:*m-floppy*"); 997MODULE_ALIAS("ide-floppy"); 998module_init(idefloppy_init); 999module_exit(idefloppy_exit); 1000MODULE_LICENSE("GPL"); 1001MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1002 1003