ide-floppy.c revision 9f87abe892f899f19df8d472f937ee955cd6264b
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 IDEFLOPPY_VERSION "1.00" 19 20#include <linux/module.h> 21#include <linux/types.h> 22#include <linux/string.h> 23#include <linux/kernel.h> 24#include <linux/delay.h> 25#include <linux/timer.h> 26#include <linux/mm.h> 27#include <linux/interrupt.h> 28#include <linux/major.h> 29#include <linux/errno.h> 30#include <linux/genhd.h> 31#include <linux/slab.h> 32#include <linux/cdrom.h> 33#include <linux/ide.h> 34#include <linux/bitops.h> 35#include <linux/mutex.h> 36 37#include <scsi/scsi_ioctl.h> 38 39#include <asm/byteorder.h> 40#include <linux/irq.h> 41#include <linux/uaccess.h> 42#include <linux/io.h> 43#include <asm/unaligned.h> 44 45/* define to see debug info */ 46#define IDEFLOPPY_DEBUG_LOG 0 47 48/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 49#define IDEFLOPPY_DEBUG(fmt, args...) 50 51#if IDEFLOPPY_DEBUG_LOG 52#define debug_log(fmt, args...) \ 53 printk(KERN_INFO "ide-floppy: " fmt, ## args) 54#else 55#define debug_log(fmt, args...) do {} while (0) 56#endif 57 58 59/* Some drives require a longer irq timeout. */ 60#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 61 62/* 63 * After each failed packet command we issue a request sense command and retry 64 * the packet command IDEFLOPPY_MAX_PC_RETRIES times. 65 */ 66#define IDEFLOPPY_MAX_PC_RETRIES 3 67 68/* 69 * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE 70 * bytes. 71 */ 72#define IDEFLOPPY_PC_BUFFER_SIZE 256 73 74/* 75 * In various places in the driver, we need to allocate storage for packet 76 * commands and requests, which will remain valid while we leave the driver to 77 * wait for an interrupt or a timeout event. 78 */ 79#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 80 81/* format capacities descriptor codes */ 82#define CAPACITY_INVALID 0x00 83#define CAPACITY_UNFORMATTED 0x01 84#define CAPACITY_CURRENT 0x02 85#define CAPACITY_NO_CARTRIDGE 0x03 86 87/* 88 * Most of our global data which we need to save even as we leave the driver 89 * due to an interrupt or a timer event is stored in a variable of type 90 * idefloppy_floppy_t, defined below. 91 */ 92typedef struct ide_floppy_obj { 93 ide_drive_t *drive; 94 ide_driver_t *driver; 95 struct gendisk *disk; 96 struct kref kref; 97 unsigned int openers; /* protected by BKL for now */ 98 99 /* Current packet command */ 100 struct ide_atapi_pc *pc; 101 /* Last failed packet command */ 102 struct ide_atapi_pc *failed_pc; 103 /* Packet command stack */ 104 struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK]; 105 /* Next free packet command storage space */ 106 int pc_stack_index; 107 struct request rq_stack[IDEFLOPPY_PC_STACK]; 108 /* We implement a circular array */ 109 int rq_stack_index; 110 111 /* Last error information */ 112 u8 sense_key, asc, ascq; 113 /* delay this long before sending packet command */ 114 u8 ticks; 115 int progress_indication; 116 117 /* Device information */ 118 /* Current format */ 119 int blocks, block_size, bs_factor; 120 /* Last format capacity descriptor */ 121 u8 cap_desc[8]; 122 /* Copy of the flexible disk page */ 123 u8 flexible_disk_page[32]; 124 /* Write protect */ 125 int wp; 126 /* Supports format progress report */ 127 int srfp; 128 /* Status/Action flags */ 129 unsigned long flags; 130} idefloppy_floppy_t; 131 132#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 133 134/* Floppy flag bits values. */ 135enum { 136 /* DRQ interrupt device */ 137 IDEFLOPPY_FLAG_DRQ_INTERRUPT = (1 << 0), 138 /* Media may have changed */ 139 IDEFLOPPY_FLAG_MEDIA_CHANGED = (1 << 1), 140 /* Format in progress */ 141 IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS = (1 << 2), 142 /* Avoid commands not supported in Clik drive */ 143 IDEFLOPPY_FLAG_CLIK_DRIVE = (1 << 3), 144 /* Requires BH algorithm for packets */ 145 IDEFLOPPY_FLAG_ZIP_DRIVE = (1 << 4), 146}; 147 148/* Defines for the MODE SENSE command */ 149#define MODE_SENSE_CURRENT 0x00 150#define MODE_SENSE_CHANGEABLE 0x01 151#define MODE_SENSE_DEFAULT 0x02 152#define MODE_SENSE_SAVED 0x03 153 154/* IOCTLs used in low-level formatting. */ 155#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 156#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 157#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 158#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 159 160/* Error code returned in rq->errors to the higher part of the driver. */ 161#define IDEFLOPPY_ERROR_GENERAL 101 162 163/* 164 * Pages of the SELECT SENSE / MODE SENSE packet commands. 165 * See SFF-8070i spec. 166 */ 167#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 168#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 169 170static DEFINE_MUTEX(idefloppy_ref_mutex); 171 172#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 173 174#define ide_floppy_g(disk) \ 175 container_of((disk)->private_data, struct ide_floppy_obj, driver) 176 177static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 178{ 179 struct ide_floppy_obj *floppy = NULL; 180 181 mutex_lock(&idefloppy_ref_mutex); 182 floppy = ide_floppy_g(disk); 183 if (floppy) 184 kref_get(&floppy->kref); 185 mutex_unlock(&idefloppy_ref_mutex); 186 return floppy; 187} 188 189static void idefloppy_cleanup_obj(struct kref *); 190 191static void ide_floppy_put(struct ide_floppy_obj *floppy) 192{ 193 mutex_lock(&idefloppy_ref_mutex); 194 kref_put(&floppy->kref, idefloppy_cleanup_obj); 195 mutex_unlock(&idefloppy_ref_mutex); 196} 197 198/* 199 * Used to finish servicing a request. For read/write requests, we will call 200 * ide_end_request to pass to the next buffer. 201 */ 202static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) 203{ 204 idefloppy_floppy_t *floppy = drive->driver_data; 205 struct request *rq = HWGROUP(drive)->rq; 206 int error; 207 208 debug_log("Reached %s\n", __func__); 209 210 switch (uptodate) { 211 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 212 case 1: error = 0; break; 213 default: error = uptodate; 214 } 215 if (error) 216 floppy->failed_pc = NULL; 217 /* Why does this happen? */ 218 if (!rq) 219 return 0; 220 if (!blk_special_request(rq)) { 221 /* our real local end request function */ 222 ide_end_request(drive, uptodate, nsecs); 223 return 0; 224 } 225 rq->errors = error; 226 /* fixme: need to move this local also */ 227 ide_end_drive_cmd(drive, 0, 0); 228 return 0; 229} 230 231static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, 232 unsigned int bcount, int direction) 233{ 234 ide_hwif_t *hwif = drive->hwif; 235 struct request *rq = pc->rq; 236 struct req_iterator iter; 237 struct bio_vec *bvec; 238 unsigned long flags; 239 int count, done = 0; 240 char *data; 241 242 rq_for_each_segment(bvec, rq, iter) { 243 if (!bcount) 244 break; 245 246 count = min(bvec->bv_len, bcount); 247 248 data = bvec_kmap_irq(bvec, &flags); 249 if (direction) 250 hwif->output_data(drive, NULL, data, count); 251 else 252 hwif->input_data(drive, NULL, data, count); 253 bvec_kunmap_irq(data, &flags); 254 255 bcount -= count; 256 pc->b_count += count; 257 done += count; 258 } 259 260 idefloppy_end_request(drive, 1, done >> 9); 261 262 if (bcount) { 263 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n", 264 drive->name, __func__, bcount); 265 ide_pad_transfer(drive, direction, bcount); 266 } 267} 268 269static void idefloppy_update_buffers(ide_drive_t *drive, 270 struct ide_atapi_pc *pc) 271{ 272 struct request *rq = pc->rq; 273 struct bio *bio = rq->bio; 274 275 while ((bio = rq->bio) != NULL) 276 idefloppy_end_request(drive, 1, 0); 277} 278 279/* 280 * Generate a new packet command request in front of the request queue, before 281 * the current request so that it will be processed immediately, on the next 282 * pass through the driver. 283 */ 284static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc, 285 struct request *rq) 286{ 287 struct ide_floppy_obj *floppy = drive->driver_data; 288 289 ide_init_drive_cmd(rq); 290 rq->buffer = (char *) pc; 291 rq->cmd_type = REQ_TYPE_SPECIAL; 292 rq->rq_disk = floppy->disk; 293 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 294} 295 296static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive) 297{ 298 idefloppy_floppy_t *floppy = drive->driver_data; 299 300 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 301 floppy->pc_stack_index = 0; 302 return (&floppy->pc_stack[floppy->pc_stack_index++]); 303} 304 305static struct request *idefloppy_next_rq_storage(ide_drive_t *drive) 306{ 307 idefloppy_floppy_t *floppy = drive->driver_data; 308 309 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 310 floppy->rq_stack_index = 0; 311 return (&floppy->rq_stack[floppy->rq_stack_index++]); 312} 313 314static void idefloppy_request_sense_callback(ide_drive_t *drive) 315{ 316 idefloppy_floppy_t *floppy = drive->driver_data; 317 u8 *buf = floppy->pc->buf; 318 319 debug_log("Reached %s\n", __func__); 320 321 if (!floppy->pc->error) { 322 floppy->sense_key = buf[2] & 0x0F; 323 floppy->asc = buf[12]; 324 floppy->ascq = buf[13]; 325 floppy->progress_indication = buf[15] & 0x80 ? 326 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 327 328 if (floppy->failed_pc) 329 debug_log("pc = %x, sense key = %x, asc = %x," 330 " ascq = %x\n", 331 floppy->failed_pc->c[0], 332 floppy->sense_key, 333 floppy->asc, 334 floppy->ascq); 335 else 336 debug_log("sense key = %x, asc = %x, ascq = %x\n", 337 floppy->sense_key, 338 floppy->asc, 339 floppy->ascq); 340 341 342 idefloppy_end_request(drive, 1, 0); 343 } else { 344 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting" 345 " request!\n"); 346 idefloppy_end_request(drive, 0, 0); 347 } 348} 349 350/* General packet command callback function. */ 351static void idefloppy_pc_callback(ide_drive_t *drive) 352{ 353 idefloppy_floppy_t *floppy = drive->driver_data; 354 355 debug_log("Reached %s\n", __func__); 356 357 idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0); 358} 359 360static void idefloppy_init_pc(struct ide_atapi_pc *pc) 361{ 362 memset(pc->c, 0, 12); 363 pc->retries = 0; 364 pc->flags = 0; 365 pc->req_xfer = 0; 366 pc->buf = pc->pc_buf; 367 pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE; 368 pc->idefloppy_callback = &idefloppy_pc_callback; 369} 370 371static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc) 372{ 373 idefloppy_init_pc(pc); 374 pc->c[0] = GPCMD_REQUEST_SENSE; 375 pc->c[4] = 255; 376 pc->req_xfer = 18; 377 pc->idefloppy_callback = &idefloppy_request_sense_callback; 378} 379 380/* 381 * Called when an error was detected during the last packet command. We queue a 382 * request sense packet command in the head of the request list. 383 */ 384static void idefloppy_retry_pc(ide_drive_t *drive) 385{ 386 struct ide_atapi_pc *pc; 387 struct request *rq; 388 389 (void)ide_read_error(drive); 390 pc = idefloppy_next_pc_storage(drive); 391 rq = idefloppy_next_rq_storage(drive); 392 idefloppy_create_request_sense_cmd(pc); 393 idefloppy_queue_pc_head(drive, pc, rq); 394} 395 396/* The usual interrupt handler called during a packet command. */ 397static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) 398{ 399 idefloppy_floppy_t *floppy = drive->driver_data; 400 ide_hwif_t *hwif = drive->hwif; 401 struct ide_atapi_pc *pc = floppy->pc; 402 struct request *rq = pc->rq; 403 xfer_func_t *xferfunc; 404 unsigned int temp; 405 int dma_error = 0; 406 u16 bcount; 407 u8 stat, ireason; 408 409 debug_log("Reached %s interrupt handler\n", __func__); 410 411 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { 412 dma_error = hwif->dma_ops->dma_end(drive); 413 if (dma_error) { 414 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 415 rq_data_dir(rq) ? "write" : "read"); 416 pc->flags |= PC_FLAG_DMA_ERROR; 417 } else { 418 pc->xferred = pc->req_xfer; 419 idefloppy_update_buffers(drive, pc); 420 } 421 debug_log("DMA finished\n"); 422 } 423 424 /* Clear the interrupt */ 425 stat = ide_read_status(drive); 426 427 /* No more interrupts */ 428 if ((stat & DRQ_STAT) == 0) { 429 debug_log("Packet command completed, %d bytes transferred\n", 430 pc->xferred); 431 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; 432 433 local_irq_enable_in_hardirq(); 434 435 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) { 436 /* Error detected */ 437 debug_log("%s: I/O error\n", drive->name); 438 rq->errors++; 439 if (pc->c[0] == GPCMD_REQUEST_SENSE) { 440 printk(KERN_ERR "ide-floppy: I/O error in " 441 "request sense command\n"); 442 return ide_do_reset(drive); 443 } 444 /* Retry operation */ 445 idefloppy_retry_pc(drive); 446 /* queued, but not started */ 447 return ide_stopped; 448 } 449 pc->error = 0; 450 if (floppy->failed_pc == pc) 451 floppy->failed_pc = NULL; 452 /* Command finished - Call the callback function */ 453 pc->idefloppy_callback(drive); 454 return ide_stopped; 455 } 456 457 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { 458 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; 459 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 460 "more interrupts in DMA mode\n"); 461 ide_dma_off(drive); 462 return ide_do_reset(drive); 463 } 464 465 /* Get the number of bytes to transfer */ 466 bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) | 467 hwif->INB(hwif->io_ports.lbam_addr); 468 /* on this interrupt */ 469 ireason = hwif->INB(hwif->io_ports.nsect_addr); 470 471 if (ireason & CD) { 472 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__); 473 return ide_do_reset(drive); 474 } 475 if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) { 476 /* Hopefully, we will never get here */ 477 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 478 (ireason & IO) ? "Write" : "Read"); 479 printk(KERN_ERR "but the floppy wants us to %s !\n", 480 (ireason & IO) ? "Read" : "Write"); 481 return ide_do_reset(drive); 482 } 483 if (!(pc->flags & PC_FLAG_WRITING)) { 484 /* Reading - Check that we have enough space */ 485 temp = pc->xferred + bcount; 486 if (temp > pc->req_xfer) { 487 if (temp > pc->buf_size) { 488 printk(KERN_ERR "ide-floppy: The floppy wants " 489 "to send us more data than expected " 490 "- discarding data\n"); 491 ide_pad_transfer(drive, 0, bcount); 492 493 ide_set_handler(drive, 494 &idefloppy_pc_intr, 495 IDEFLOPPY_WAIT_CMD, 496 NULL); 497 return ide_started; 498 } 499 debug_log("The floppy wants to send us more data than" 500 " expected - allowing transfer\n"); 501 } 502 } 503 if (pc->flags & PC_FLAG_WRITING) 504 xferfunc = hwif->output_data; 505 else 506 xferfunc = hwif->input_data; 507 508 if (pc->buf) 509 xferfunc(drive, NULL, pc->cur_pos, bcount); 510 else 511 ide_floppy_io_buffers(drive, pc, bcount, 512 !!(pc->flags & PC_FLAG_WRITING)); 513 514 /* Update the current position */ 515 pc->xferred += bcount; 516 pc->cur_pos += bcount; 517 518 /* And set the interrupt handler again */ 519 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 520 return ide_started; 521} 522 523/* 524 * This is the original routine that did the packet transfer. 525 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 526 * for that drive below. The algorithm is chosen based on drive type 527 */ 528static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive) 529{ 530 ide_hwif_t *hwif = drive->hwif; 531 ide_startstop_t startstop; 532 idefloppy_floppy_t *floppy = drive->driver_data; 533 u8 ireason; 534 535 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 536 printk(KERN_ERR "ide-floppy: Strange, packet command " 537 "initiated yet DRQ isn't asserted\n"); 538 return startstop; 539 } 540 ireason = hwif->INB(hwif->io_ports.nsect_addr); 541 if ((ireason & CD) == 0 || (ireason & IO)) { 542 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 543 "issuing a packet command\n"); 544 return ide_do_reset(drive); 545 } 546 547 /* Set the interrupt routine */ 548 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 549 550 /* Send the actual packet */ 551 hwif->output_data(drive, NULL, floppy->pc->c, 12); 552 553 return ide_started; 554} 555 556 557/* 558 * What we have here is a classic case of a top half / bottom half interrupt 559 * service routine. In interrupt mode, the device sends an interrupt to signal 560 * that it is ready to receive a packet. However, we need to delay about 2-3 561 * ticks before issuing the packet or we gets in trouble. 562 * 563 * So, follow carefully. transfer_pc1 is called as an interrupt (or directly). 564 * In either case, when the device says it's ready for a packet, we schedule 565 * the packet transfer to occur about 2-3 ticks later in transfer_pc2. 566 */ 567static int idefloppy_transfer_pc2(ide_drive_t *drive) 568{ 569 idefloppy_floppy_t *floppy = drive->driver_data; 570 571 /* Send the actual packet */ 572 drive->hwif->output_data(drive, NULL, floppy->pc->c, 12); 573 574 /* Timeout for the packet command */ 575 return IDEFLOPPY_WAIT_CMD; 576} 577 578static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive) 579{ 580 ide_hwif_t *hwif = drive->hwif; 581 idefloppy_floppy_t *floppy = drive->driver_data; 582 ide_startstop_t startstop; 583 u8 ireason; 584 585 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 586 printk(KERN_ERR "ide-floppy: Strange, packet command " 587 "initiated yet DRQ isn't asserted\n"); 588 return startstop; 589 } 590 ireason = hwif->INB(hwif->io_ports.nsect_addr); 591 if ((ireason & CD) == 0 || (ireason & IO)) { 592 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 593 "while issuing a packet command\n"); 594 return ide_do_reset(drive); 595 } 596 /* 597 * The following delay solves a problem with ATAPI Zip 100 drives 598 * where the Busy flag was apparently being deasserted before the 599 * unit was ready to receive data. This was happening on a 600 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 601 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 602 * used until after the packet is moved in about 50 msec. 603 */ 604 605 ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks, 606 &idefloppy_transfer_pc2); 607 return ide_started; 608} 609 610static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 611 struct ide_atapi_pc *pc) 612{ 613 /* supress error messages resulting from Medium not present */ 614 if (floppy->sense_key == 0x02 && 615 floppy->asc == 0x3a && 616 floppy->ascq == 0x00) 617 return; 618 619 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " 620 "asc = %2x, ascq = %2x\n", 621 floppy->drive->name, pc->c[0], floppy->sense_key, 622 floppy->asc, floppy->ascq); 623 624} 625 626static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, 627 struct ide_atapi_pc *pc) 628{ 629 idefloppy_floppy_t *floppy = drive->driver_data; 630 ide_hwif_t *hwif = drive->hwif; 631 ide_handler_t *pkt_xfer_routine; 632 u16 bcount; 633 u8 dma; 634 635 if (floppy->failed_pc == NULL && 636 pc->c[0] != GPCMD_REQUEST_SENSE) 637 floppy->failed_pc = pc; 638 /* Set the current packet command */ 639 floppy->pc = pc; 640 641 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { 642 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) 643 ide_floppy_report_error(floppy, pc); 644 /* Giving up */ 645 pc->error = IDEFLOPPY_ERROR_GENERAL; 646 647 floppy->failed_pc = NULL; 648 pc->idefloppy_callback(drive); 649 return ide_stopped; 650 } 651 652 debug_log("Retry number - %d\n", pc->retries); 653 654 pc->retries++; 655 /* We haven't transferred any data yet */ 656 pc->xferred = 0; 657 pc->cur_pos = pc->buf; 658 bcount = min(pc->req_xfer, 63 * 1024); 659 660 if (pc->flags & PC_FLAG_DMA_ERROR) { 661 pc->flags &= ~PC_FLAG_DMA_ERROR; 662 ide_dma_off(drive); 663 } 664 dma = 0; 665 666 if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma) 667 dma = !hwif->dma_ops->dma_setup(drive); 668 669 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK | 670 IDE_TFLAG_OUT_DEVICE, bcount, dma); 671 672 if (dma) { 673 /* Begin DMA, if necessary */ 674 pc->flags |= PC_FLAG_DMA_IN_PROGRESS; 675 hwif->dma_ops->dma_start(drive); 676 } 677 678 /* Can we transfer the packet when we get the interrupt or wait? */ 679 if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) { 680 /* wait */ 681 pkt_xfer_routine = &idefloppy_transfer_pc1; 682 } else { 683 /* immediate */ 684 pkt_xfer_routine = &idefloppy_transfer_pc; 685 } 686 687 if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) { 688 /* Issue the packet command */ 689 ide_execute_command(drive, WIN_PACKETCMD, 690 pkt_xfer_routine, 691 IDEFLOPPY_WAIT_CMD, 692 NULL); 693 return ide_started; 694 } else { 695 /* Issue the packet command */ 696 ide_execute_pkt_cmd(drive); 697 return (*pkt_xfer_routine) (drive); 698 } 699} 700 701static void idefloppy_rw_callback(ide_drive_t *drive) 702{ 703 debug_log("Reached %s\n", __func__); 704 705 idefloppy_end_request(drive, 1, 0); 706 return; 707} 708 709static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent) 710{ 711 debug_log("creating prevent removal command, prevent = %d\n", prevent); 712 713 idefloppy_init_pc(pc); 714 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; 715 pc->c[4] = prevent; 716} 717 718static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) 719{ 720 idefloppy_init_pc(pc); 721 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 722 pc->c[7] = 255; 723 pc->c[8] = 255; 724 pc->req_xfer = 255; 725} 726 727static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b, 728 int l, int flags) 729{ 730 idefloppy_init_pc(pc); 731 pc->c[0] = GPCMD_FORMAT_UNIT; 732 pc->c[1] = 0x17; 733 734 memset(pc->buf, 0, 12); 735 pc->buf[1] = 0xA2; 736 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 737 738 if (flags & 1) /* Verify bit on... */ 739 pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */ 740 pc->buf[3] = 8; 741 742 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4])); 743 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8])); 744 pc->buf_size = 12; 745 pc->flags |= PC_FLAG_WRITING; 746} 747 748/* A mode sense command is used to "sense" floppy parameters. */ 749static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, 750 u8 page_code, u8 type) 751{ 752 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 753 754 idefloppy_init_pc(pc); 755 pc->c[0] = GPCMD_MODE_SENSE_10; 756 pc->c[1] = 0; 757 pc->c[2] = page_code + (type << 6); 758 759 switch (page_code) { 760 case IDEFLOPPY_CAPABILITIES_PAGE: 761 length += 12; 762 break; 763 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 764 length += 32; 765 break; 766 default: 767 printk(KERN_ERR "ide-floppy: unsupported page code " 768 "in create_mode_sense_cmd\n"); 769 } 770 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 771 pc->req_xfer = length; 772} 773 774static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start) 775{ 776 idefloppy_init_pc(pc); 777 pc->c[0] = GPCMD_START_STOP_UNIT; 778 pc->c[4] = start; 779} 780 781static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc) 782{ 783 idefloppy_init_pc(pc); 784 pc->c[0] = GPCMD_TEST_UNIT_READY; 785} 786 787static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, 788 struct ide_atapi_pc *pc, struct request *rq, 789 unsigned long sector) 790{ 791 int block = sector / floppy->bs_factor; 792 int blocks = rq->nr_sectors / floppy->bs_factor; 793 int cmd = rq_data_dir(rq); 794 795 debug_log("create_rw10_cmd: block == %d, blocks == %d\n", 796 block, blocks); 797 798 idefloppy_init_pc(pc); 799 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 800 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 801 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 802 803 pc->idefloppy_callback = &idefloppy_rw_callback; 804 pc->rq = rq; 805 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 806 if (rq->cmd_flags & REQ_RW) 807 pc->flags |= PC_FLAG_WRITING; 808 pc->buf = NULL; 809 pc->req_xfer = pc->buf_size = blocks * floppy->block_size; 810 pc->flags |= PC_FLAG_DMA_RECOMMENDED; 811} 812 813static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, 814 struct ide_atapi_pc *pc, struct request *rq) 815{ 816 idefloppy_init_pc(pc); 817 pc->idefloppy_callback = &idefloppy_rw_callback; 818 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 819 pc->rq = rq; 820 pc->b_count = rq->data_len; 821 if (rq->data_len && rq_data_dir(rq) == WRITE) 822 pc->flags |= PC_FLAG_WRITING; 823 pc->buf = rq->data; 824 if (rq->bio) 825 pc->flags |= PC_FLAG_DMA_RECOMMENDED; 826 /* 827 * possibly problematic, doesn't look like ide-floppy correctly 828 * handled scattered requests if dma fails... 829 */ 830 pc->req_xfer = pc->buf_size = rq->data_len; 831} 832 833static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, 834 struct request *rq, sector_t block_s) 835{ 836 idefloppy_floppy_t *floppy = drive->driver_data; 837 struct ide_atapi_pc *pc; 838 unsigned long block = (unsigned long)block_s; 839 840 debug_log("dev: %s, cmd_type: %x, errors: %d\n", 841 rq->rq_disk ? rq->rq_disk->disk_name : "?", 842 rq->cmd_type, rq->errors); 843 debug_log("sector: %ld, nr_sectors: %ld, " 844 "current_nr_sectors: %d\n", (long)rq->sector, 845 rq->nr_sectors, rq->current_nr_sectors); 846 847 if (rq->errors >= ERROR_MAX) { 848 if (floppy->failed_pc) 849 ide_floppy_report_error(floppy, floppy->failed_pc); 850 else 851 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 852 drive->name); 853 idefloppy_end_request(drive, 0, 0); 854 return ide_stopped; 855 } 856 if (blk_fs_request(rq)) { 857 if (((long)rq->sector % floppy->bs_factor) || 858 (rq->nr_sectors % floppy->bs_factor)) { 859 printk(KERN_ERR "%s: unsupported r/w request size\n", 860 drive->name); 861 idefloppy_end_request(drive, 0, 0); 862 return ide_stopped; 863 } 864 pc = idefloppy_next_pc_storage(drive); 865 idefloppy_create_rw_cmd(floppy, pc, rq, block); 866 } else if (blk_special_request(rq)) { 867 pc = (struct ide_atapi_pc *) rq->buffer; 868 } else if (blk_pc_request(rq)) { 869 pc = idefloppy_next_pc_storage(drive); 870 idefloppy_blockpc_cmd(floppy, pc, rq); 871 } else { 872 blk_dump_rq_flags(rq, 873 "ide-floppy: unsupported command in queue"); 874 idefloppy_end_request(drive, 0, 0); 875 return ide_stopped; 876 } 877 878 pc->rq = rq; 879 return idefloppy_issue_pc(drive, pc); 880} 881 882/* 883 * Add a special packet command request to the tail of the request queue, 884 * and wait for it to be serviced. 885 */ 886static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc) 887{ 888 struct ide_floppy_obj *floppy = drive->driver_data; 889 struct request rq; 890 891 ide_init_drive_cmd(&rq); 892 rq.buffer = (char *) pc; 893 rq.cmd_type = REQ_TYPE_SPECIAL; 894 rq.rq_disk = floppy->disk; 895 896 return ide_do_drive_cmd(drive, &rq, ide_wait); 897} 898 899/* 900 * Look at the flexible disk page parameters. We ignore the CHS capacity 901 * parameters and use the LBA parameters instead. 902 */ 903static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 904{ 905 idefloppy_floppy_t *floppy = drive->driver_data; 906 struct ide_atapi_pc pc; 907 u8 *page; 908 int capacity, lba_capacity; 909 u16 transfer_rate, sector_size, cyls, rpm; 910 u8 heads, sectors; 911 912 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, 913 MODE_SENSE_CURRENT); 914 915 if (idefloppy_queue_pc_tail(drive, &pc)) { 916 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 917 " parameters\n"); 918 return 1; 919 } 920 floppy->wp = !!(pc.buf[3] & 0x80); 921 set_disk_ro(floppy->disk, floppy->wp); 922 page = &pc.buf[8]; 923 924 transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]); 925 sector_size = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]); 926 cyls = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]); 927 rpm = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]); 928 heads = pc.buf[8 + 4]; 929 sectors = pc.buf[8 + 5]; 930 931 capacity = cyls * heads * sectors * sector_size; 932 933 if (memcmp(page, &floppy->flexible_disk_page, 32)) 934 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 935 "%d sector size, %d rpm\n", 936 drive->name, capacity / 1024, cyls, heads, 937 sectors, transfer_rate / 8, sector_size, rpm); 938 939 memcpy(&floppy->flexible_disk_page, page, 32); 940 drive->bios_cyl = cyls; 941 drive->bios_head = heads; 942 drive->bios_sect = sectors; 943 lba_capacity = floppy->blocks * floppy->block_size; 944 945 if (capacity < lba_capacity) { 946 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 947 "bytes, but the drive only handles %d\n", 948 drive->name, lba_capacity, capacity); 949 floppy->blocks = floppy->block_size ? 950 capacity / floppy->block_size : 0; 951 } 952 return 0; 953} 954 955static int idefloppy_get_sfrp_bit(ide_drive_t *drive) 956{ 957 idefloppy_floppy_t *floppy = drive->driver_data; 958 struct ide_atapi_pc pc; 959 960 floppy->srfp = 0; 961 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 962 MODE_SENSE_CURRENT); 963 964 pc.flags |= PC_FLAG_SUPPRESS_ERROR; 965 if (idefloppy_queue_pc_tail(drive, &pc)) 966 return 1; 967 968 floppy->srfp = pc.buf[8 + 2] & 0x40; 969 return (0); 970} 971 972/* 973 * Determine if a media is present in the floppy drive, and if so, its LBA 974 * capacity. 975 */ 976static int ide_floppy_get_capacity(ide_drive_t *drive) 977{ 978 idefloppy_floppy_t *floppy = drive->driver_data; 979 struct ide_atapi_pc pc; 980 u8 *cap_desc; 981 u8 header_len, desc_cnt; 982 int i, rc = 1, blocks, length; 983 984 drive->bios_cyl = 0; 985 drive->bios_head = drive->bios_sect = 0; 986 floppy->blocks = 0; 987 floppy->bs_factor = 1; 988 set_capacity(floppy->disk, 0); 989 990 idefloppy_create_read_capacity_cmd(&pc); 991 if (idefloppy_queue_pc_tail(drive, &pc)) { 992 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 993 return 1; 994 } 995 header_len = pc.buf[3]; 996 cap_desc = &pc.buf[4]; 997 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 998 999 for (i = 0; i < desc_cnt; i++) { 1000 unsigned int desc_start = 4 + i*8; 1001 1002 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]); 1003 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]); 1004 1005 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 1006 i, blocks * length / 1024, blocks, length); 1007 1008 if (i) 1009 continue; 1010 /* 1011 * the code below is valid only for the 1st descriptor, ie i=0 1012 */ 1013 1014 switch (pc.buf[desc_start + 4] & 0x03) { 1015 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1016 case CAPACITY_UNFORMATTED: 1017 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) 1018 /* 1019 * If it is not a clik drive, break out 1020 * (maintains previous driver behaviour) 1021 */ 1022 break; 1023 case CAPACITY_CURRENT: 1024 /* Normal Zip/LS-120 disks */ 1025 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 1026 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1027 "sector size\n", drive->name, 1028 blocks * length / 1024, blocks, length); 1029 memcpy(&floppy->cap_desc, cap_desc, 8); 1030 1031 if (!length || length % 512) { 1032 printk(KERN_NOTICE "%s: %d bytes block size " 1033 "not supported\n", drive->name, length); 1034 } else { 1035 floppy->blocks = blocks; 1036 floppy->block_size = length; 1037 floppy->bs_factor = length / 512; 1038 if (floppy->bs_factor != 1) 1039 printk(KERN_NOTICE "%s: warning: non " 1040 "512 bytes block size not " 1041 "fully supported\n", 1042 drive->name); 1043 rc = 0; 1044 } 1045 break; 1046 case CAPACITY_NO_CARTRIDGE: 1047 /* 1048 * This is a KERN_ERR so it appears on screen 1049 * for the user to see 1050 */ 1051 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1052 break; 1053 case CAPACITY_INVALID: 1054 printk(KERN_ERR "%s: Invalid capacity for disk " 1055 "in drive\n", drive->name); 1056 break; 1057 } 1058 debug_log("Descriptor 0 Code: %d\n", 1059 pc.buf[desc_start + 4] & 0x03); 1060 } 1061 1062 /* Clik! disk does not support get_flexible_disk_page */ 1063 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) 1064 (void) ide_floppy_get_flexible_disk_page(drive); 1065 1066 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1067 return rc; 1068} 1069 1070/* 1071 * Obtain the list of formattable capacities. 1072 * Very similar to ide_floppy_get_capacity, except that we push the capacity 1073 * descriptors to userland, instead of our own structures. 1074 * 1075 * Userland gives us the following structure: 1076 * 1077 * struct idefloppy_format_capacities { 1078 * int nformats; 1079 * struct { 1080 * int nblocks; 1081 * int blocksize; 1082 * } formats[]; 1083 * }; 1084 * 1085 * userland initializes nformats to the number of allocated formats[] records. 1086 * On exit we set nformats to the number of records we've actually initialized. 1087 */ 1088 1089static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1090{ 1091 struct ide_atapi_pc pc; 1092 u8 header_len, desc_cnt; 1093 int i, blocks, length, u_array_size, u_index; 1094 int __user *argp; 1095 1096 if (get_user(u_array_size, arg)) 1097 return (-EFAULT); 1098 1099 if (u_array_size <= 0) 1100 return (-EINVAL); 1101 1102 idefloppy_create_read_capacity_cmd(&pc); 1103 if (idefloppy_queue_pc_tail(drive, &pc)) { 1104 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1105 return (-EIO); 1106 } 1107 header_len = pc.buf[3]; 1108 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 1109 1110 u_index = 0; 1111 argp = arg + 1; 1112 1113 /* 1114 * We always skip the first capacity descriptor. That's the current 1115 * capacity. We are interested in the remaining descriptors, the 1116 * formattable capacities. 1117 */ 1118 for (i = 1; i < desc_cnt; i++) { 1119 unsigned int desc_start = 4 + i*8; 1120 1121 if (u_index >= u_array_size) 1122 break; /* User-supplied buffer too small */ 1123 1124 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]); 1125 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]); 1126 1127 if (put_user(blocks, argp)) 1128 return(-EFAULT); 1129 ++argp; 1130 1131 if (put_user(length, argp)) 1132 return (-EFAULT); 1133 ++argp; 1134 1135 ++u_index; 1136 } 1137 1138 if (put_user(u_index, arg)) 1139 return (-EFAULT); 1140 return (0); 1141} 1142 1143/* 1144 * Get ATAPI_FORMAT_UNIT progress indication. 1145 * 1146 * Userland gives a pointer to an int. The int is set to a progress 1147 * indicator 0-65536, with 65536=100%. 1148 * 1149 * If the drive does not support format progress indication, we just check 1150 * the dsc bit, and return either 0 or 65536. 1151 */ 1152 1153static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1154{ 1155 idefloppy_floppy_t *floppy = drive->driver_data; 1156 struct ide_atapi_pc pc; 1157 int progress_indication = 0x10000; 1158 1159 if (floppy->srfp) { 1160 idefloppy_create_request_sense_cmd(&pc); 1161 if (idefloppy_queue_pc_tail(drive, &pc)) 1162 return (-EIO); 1163 1164 if (floppy->sense_key == 2 && 1165 floppy->asc == 4 && 1166 floppy->ascq == 4) 1167 progress_indication = floppy->progress_indication; 1168 1169 /* Else assume format_unit has finished, and we're at 0x10000 */ 1170 } else { 1171 unsigned long flags; 1172 u8 stat; 1173 1174 local_irq_save(flags); 1175 stat = ide_read_status(drive); 1176 local_irq_restore(flags); 1177 1178 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; 1179 } 1180 if (put_user(progress_indication, arg)) 1181 return (-EFAULT); 1182 1183 return (0); 1184} 1185 1186static sector_t idefloppy_capacity(ide_drive_t *drive) 1187{ 1188 idefloppy_floppy_t *floppy = drive->driver_data; 1189 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1190 1191 return capacity; 1192} 1193 1194/* 1195 * Check whether we can support a drive, based on the ATAPI IDENTIFY command 1196 * results. 1197 */ 1198static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id) 1199{ 1200 u8 gcw[2]; 1201 u8 device_type, protocol, removable, drq_type, packet_size; 1202 1203 *((u16 *) &gcw) = id->config; 1204 1205 device_type = gcw[1] & 0x1F; 1206 removable = (gcw[0] & 0x80) >> 7; 1207 protocol = (gcw[1] & 0xC0) >> 6; 1208 drq_type = (gcw[0] & 0x60) >> 5; 1209 packet_size = gcw[0] & 0x03; 1210 1211#ifdef CONFIG_PPC 1212 /* kludge for Apple PowerBook internal zip */ 1213 if (device_type == 5 && 1214 !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP")) 1215 device_type = 0; 1216#endif 1217 1218 if (protocol != 2) 1219 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n", 1220 protocol); 1221 else if (device_type != 0) 1222 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set " 1223 "to floppy\n", device_type); 1224 else if (!removable) 1225 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1226 else if (drq_type == 3) 1227 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not " 1228 "supported\n", drq_type); 1229 else if (packet_size != 0) 1230 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 " 1231 "bytes\n", packet_size); 1232 else 1233 return 1; 1234 return 0; 1235} 1236 1237#ifdef CONFIG_IDE_PROC_FS 1238static void idefloppy_add_settings(ide_drive_t *drive) 1239{ 1240 idefloppy_floppy_t *floppy = drive->driver_data; 1241 1242 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, 1243 &drive->bios_cyl, NULL); 1244 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1245 &drive->bios_head, NULL); 1246 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, 1247 &drive->bios_sect, NULL); 1248 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1249 &floppy->ticks, NULL); 1250} 1251#else 1252static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1253#endif 1254 1255static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) 1256{ 1257 u8 gcw[2]; 1258 1259 *((u16 *) &gcw) = drive->id->config; 1260 floppy->pc = floppy->pc_stack; 1261 1262 if (((gcw[0] & 0x60) >> 5) == 1) 1263 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT; 1264 /* 1265 * We used to check revisions here. At this point however I'm giving up. 1266 * Just assume they are all broken, its easier. 1267 * 1268 * The actual reason for the workarounds was likely a driver bug after 1269 * all rather than a firmware bug, and the workaround below used to hide 1270 * it. It should be fixed as of version 1.9, but to be on the safe side 1271 * we'll leave the limitation below for the 2.2.x tree. 1272 */ 1273 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1274 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE; 1275 /* This value will be visible in the /proc/ide/hdx/settings */ 1276 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1277 blk_queue_max_sectors(drive->queue, 64); 1278 } 1279 1280 /* 1281 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes 1282 * nasty clicking noises without it, so please don't remove this. 1283 */ 1284 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1285 blk_queue_max_sectors(drive->queue, 64); 1286 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE; 1287 } 1288 1289 (void) ide_floppy_get_capacity(drive); 1290 idefloppy_add_settings(drive); 1291} 1292 1293static void ide_floppy_remove(ide_drive_t *drive) 1294{ 1295 idefloppy_floppy_t *floppy = drive->driver_data; 1296 struct gendisk *g = floppy->disk; 1297 1298 ide_proc_unregister_driver(drive, floppy->driver); 1299 1300 del_gendisk(g); 1301 1302 ide_floppy_put(floppy); 1303} 1304 1305static void idefloppy_cleanup_obj(struct kref *kref) 1306{ 1307 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1308 ide_drive_t *drive = floppy->drive; 1309 struct gendisk *g = floppy->disk; 1310 1311 drive->driver_data = NULL; 1312 g->private_data = NULL; 1313 put_disk(g); 1314 kfree(floppy); 1315} 1316 1317#ifdef CONFIG_IDE_PROC_FS 1318static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, 1319 int count, int *eof, void *data) 1320{ 1321 ide_drive_t*drive = (ide_drive_t *)data; 1322 int len; 1323 1324 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); 1325 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1326} 1327 1328static ide_proc_entry_t idefloppy_proc[] = { 1329 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1330 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1331 { NULL, 0, NULL, NULL } 1332}; 1333#endif /* CONFIG_IDE_PROC_FS */ 1334 1335static int ide_floppy_probe(ide_drive_t *); 1336 1337static ide_driver_t idefloppy_driver = { 1338 .gen_driver = { 1339 .owner = THIS_MODULE, 1340 .name = "ide-floppy", 1341 .bus = &ide_bus_type, 1342 }, 1343 .probe = ide_floppy_probe, 1344 .remove = ide_floppy_remove, 1345 .version = IDEFLOPPY_VERSION, 1346 .media = ide_floppy, 1347 .supports_dsc_overlap = 0, 1348 .do_request = idefloppy_do_request, 1349 .end_request = idefloppy_end_request, 1350 .error = __ide_error, 1351 .abort = __ide_abort, 1352#ifdef CONFIG_IDE_PROC_FS 1353 .proc = idefloppy_proc, 1354#endif 1355}; 1356 1357static int idefloppy_open(struct inode *inode, struct file *filp) 1358{ 1359 struct gendisk *disk = inode->i_bdev->bd_disk; 1360 struct ide_floppy_obj *floppy; 1361 ide_drive_t *drive; 1362 struct ide_atapi_pc pc; 1363 int ret = 0; 1364 1365 debug_log("Reached %s\n", __func__); 1366 1367 floppy = ide_floppy_get(disk); 1368 if (!floppy) 1369 return -ENXIO; 1370 1371 drive = floppy->drive; 1372 1373 floppy->openers++; 1374 1375 if (floppy->openers == 1) { 1376 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1377 /* Just in case */ 1378 1379 idefloppy_create_test_unit_ready_cmd(&pc); 1380 if (idefloppy_queue_pc_tail(drive, &pc)) { 1381 idefloppy_create_start_stop_cmd(&pc, 1); 1382 (void) idefloppy_queue_pc_tail(drive, &pc); 1383 } 1384 1385 if (ide_floppy_get_capacity(drive) 1386 && (filp->f_flags & O_NDELAY) == 0 1387 /* 1388 * Allow O_NDELAY to open a drive without a disk, or with an 1389 * unreadable disk, so that we can get the format capacity 1390 * of the drive or begin the format - Sam 1391 */ 1392 ) { 1393 ret = -EIO; 1394 goto out_put_floppy; 1395 } 1396 1397 if (floppy->wp && (filp->f_mode & 2)) { 1398 ret = -EROFS; 1399 goto out_put_floppy; 1400 } 1401 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED; 1402 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1403 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1404 idefloppy_create_prevent_cmd(&pc, 1); 1405 (void) idefloppy_queue_pc_tail(drive, &pc); 1406 } 1407 check_disk_change(inode->i_bdev); 1408 } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) { 1409 ret = -EBUSY; 1410 goto out_put_floppy; 1411 } 1412 return 0; 1413 1414out_put_floppy: 1415 floppy->openers--; 1416 ide_floppy_put(floppy); 1417 return ret; 1418} 1419 1420static int idefloppy_release(struct inode *inode, struct file *filp) 1421{ 1422 struct gendisk *disk = inode->i_bdev->bd_disk; 1423 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1424 ide_drive_t *drive = floppy->drive; 1425 struct ide_atapi_pc pc; 1426 1427 debug_log("Reached %s\n", __func__); 1428 1429 if (floppy->openers == 1) { 1430 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1431 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1432 idefloppy_create_prevent_cmd(&pc, 0); 1433 (void) idefloppy_queue_pc_tail(drive, &pc); 1434 } 1435 1436 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1437 } 1438 1439 floppy->openers--; 1440 1441 ide_floppy_put(floppy); 1442 1443 return 0; 1444} 1445 1446static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1447{ 1448 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1449 ide_drive_t *drive = floppy->drive; 1450 1451 geo->heads = drive->bios_head; 1452 geo->sectors = drive->bios_sect; 1453 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1454 return 0; 1455} 1456 1457static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, 1458 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd) 1459{ 1460 if (floppy->openers > 1) 1461 return -EBUSY; 1462 1463 /* The IOMEGA Clik! Drive doesn't support this command - 1464 * no room for an eject mechanism */ 1465 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1466 int prevent = arg ? 1 : 0; 1467 1468 if (cmd == CDROMEJECT) 1469 prevent = 0; 1470 1471 idefloppy_create_prevent_cmd(pc, prevent); 1472 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1473 } 1474 1475 if (cmd == CDROMEJECT) { 1476 idefloppy_create_start_stop_cmd(pc, 2); 1477 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1478 } 1479 1480 return 0; 1481} 1482 1483static int ide_floppy_format_unit(idefloppy_floppy_t *floppy, 1484 int __user *arg) 1485{ 1486 int blocks, length, flags, err = 0; 1487 struct ide_atapi_pc pc; 1488 1489 if (floppy->openers > 1) { 1490 /* Don't format if someone is using the disk */ 1491 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1492 return -EBUSY; 1493 } 1494 1495 floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1496 1497 /* 1498 * Send ATAPI_FORMAT_UNIT to the drive. 1499 * 1500 * Userland gives us the following structure: 1501 * 1502 * struct idefloppy_format_command { 1503 * int nblocks; 1504 * int blocksize; 1505 * int flags; 1506 * } ; 1507 * 1508 * flags is a bitmask, currently, the only defined flag is: 1509 * 1510 * 0x01 - verify media after format. 1511 */ 1512 if (get_user(blocks, arg) || 1513 get_user(length, arg+1) || 1514 get_user(flags, arg+2)) { 1515 err = -EFAULT; 1516 goto out; 1517 } 1518 1519 (void) idefloppy_get_sfrp_bit(floppy->drive); 1520 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1521 1522 if (idefloppy_queue_pc_tail(floppy->drive, &pc)) 1523 err = -EIO; 1524 1525out: 1526 if (err) 1527 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1528 return err; 1529} 1530 1531 1532static int idefloppy_ioctl(struct inode *inode, struct file *file, 1533 unsigned int cmd, unsigned long arg) 1534{ 1535 struct block_device *bdev = inode->i_bdev; 1536 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1537 ide_drive_t *drive = floppy->drive; 1538 struct ide_atapi_pc pc; 1539 void __user *argp = (void __user *)arg; 1540 int err; 1541 1542 switch (cmd) { 1543 case CDROMEJECT: 1544 /* fall through */ 1545 case CDROM_LOCKDOOR: 1546 return ide_floppy_lockdoor(floppy, &pc, arg, cmd); 1547 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1548 return 0; 1549 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1550 return ide_floppy_get_format_capacities(drive, argp); 1551 case IDEFLOPPY_IOCTL_FORMAT_START: 1552 if (!(file->f_mode & 2)) 1553 return -EPERM; 1554 1555 return ide_floppy_format_unit(floppy, (int __user *)arg); 1556 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1557 return idefloppy_get_format_progress(drive, argp); 1558 } 1559 1560 /* 1561 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 1562 * and CDROM_SEND_PACKET (legacy) ioctls 1563 */ 1564 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 1565 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 1566 bdev->bd_disk, cmd, argp); 1567 else 1568 err = -ENOTTY; 1569 1570 if (err == -ENOTTY) 1571 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 1572 1573 return err; 1574} 1575 1576static int idefloppy_media_changed(struct gendisk *disk) 1577{ 1578 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1579 ide_drive_t *drive = floppy->drive; 1580 int ret; 1581 1582 /* do not scan partitions twice if this is a removable device */ 1583 if (drive->attach) { 1584 drive->attach = 0; 1585 return 0; 1586 } 1587 ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED); 1588 floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED; 1589 return ret; 1590} 1591 1592static int idefloppy_revalidate_disk(struct gendisk *disk) 1593{ 1594 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1595 set_capacity(disk, idefloppy_capacity(floppy->drive)); 1596 return 0; 1597} 1598 1599static struct block_device_operations idefloppy_ops = { 1600 .owner = THIS_MODULE, 1601 .open = idefloppy_open, 1602 .release = idefloppy_release, 1603 .ioctl = idefloppy_ioctl, 1604 .getgeo = idefloppy_getgeo, 1605 .media_changed = idefloppy_media_changed, 1606 .revalidate_disk = idefloppy_revalidate_disk 1607}; 1608 1609static int ide_floppy_probe(ide_drive_t *drive) 1610{ 1611 idefloppy_floppy_t *floppy; 1612 struct gendisk *g; 1613 1614 if (!strstr("ide-floppy", drive->driver_req)) 1615 goto failed; 1616 if (!drive->present) 1617 goto failed; 1618 if (drive->media != ide_floppy) 1619 goto failed; 1620 if (!idefloppy_identify_device(drive, drive->id)) { 1621 printk(KERN_ERR "ide-floppy: %s: not supported by this version" 1622 " of ide-floppy\n", drive->name); 1623 goto failed; 1624 } 1625 if (drive->scsi) { 1626 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi" 1627 " emulation.\n", drive->name); 1628 goto failed; 1629 } 1630 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); 1631 if (!floppy) { 1632 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy" 1633 " structure\n", drive->name); 1634 goto failed; 1635 } 1636 1637 g = alloc_disk(1 << PARTN_BITS); 1638 if (!g) 1639 goto out_free_floppy; 1640 1641 ide_init_disk(g, drive); 1642 1643 ide_proc_register_driver(drive, &idefloppy_driver); 1644 1645 kref_init(&floppy->kref); 1646 1647 floppy->drive = drive; 1648 floppy->driver = &idefloppy_driver; 1649 floppy->disk = g; 1650 1651 g->private_data = &floppy->driver; 1652 1653 drive->driver_data = floppy; 1654 1655 idefloppy_setup(drive, floppy); 1656 1657 g->minors = 1 << PARTN_BITS; 1658 g->driverfs_dev = &drive->gendev; 1659 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 1660 g->fops = &idefloppy_ops; 1661 drive->attach = 1; 1662 add_disk(g); 1663 return 0; 1664 1665out_free_floppy: 1666 kfree(floppy); 1667failed: 1668 return -ENODEV; 1669} 1670 1671static void __exit idefloppy_exit(void) 1672{ 1673 driver_unregister(&idefloppy_driver.gen_driver); 1674} 1675 1676static int __init idefloppy_init(void) 1677{ 1678 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 1679 return driver_register(&idefloppy_driver.gen_driver); 1680} 1681 1682MODULE_ALIAS("ide:*m-floppy*"); 1683module_init(idefloppy_init); 1684module_exit(idefloppy_exit); 1685MODULE_LICENSE("GPL"); 1686MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1687 1688