ide-floppy.c revision 4c3032d8a4d6c97bd6e02bcab524ef2428d89561
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 struct request *rq = pc->rq; 235 struct req_iterator iter; 236 struct bio_vec *bvec; 237 unsigned long flags; 238 int count, done = 0; 239 char *data; 240 241 rq_for_each_segment(bvec, rq, iter) { 242 if (!bcount) 243 break; 244 245 count = min(bvec->bv_len, bcount); 246 247 data = bvec_kmap_irq(bvec, &flags); 248 if (direction) 249 drive->hwif->atapi_output_bytes(drive, data, count); 250 else 251 drive->hwif->atapi_input_bytes(drive, data, count); 252 bvec_kunmap_irq(data, &flags); 253 254 bcount -= count; 255 pc->b_count += count; 256 done += count; 257 } 258 259 idefloppy_end_request(drive, 1, done >> 9); 260 261 if (bcount) { 262 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n", 263 drive->name, __func__, bcount); 264 if (direction) 265 ide_atapi_write_zeros(drive, bcount); 266 else 267 ide_atapi_discard_data(drive, bcount); 268 } 269} 270 271static void idefloppy_update_buffers(ide_drive_t *drive, 272 struct ide_atapi_pc *pc) 273{ 274 struct request *rq = pc->rq; 275 struct bio *bio = rq->bio; 276 277 while ((bio = rq->bio) != NULL) 278 idefloppy_end_request(drive, 1, 0); 279} 280 281/* 282 * Generate a new packet command request in front of the request queue, before 283 * the current request so that it will be processed immediately, on the next 284 * pass through the driver. 285 */ 286static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc, 287 struct request *rq) 288{ 289 struct ide_floppy_obj *floppy = drive->driver_data; 290 291 ide_init_drive_cmd(rq); 292 rq->buffer = (char *) pc; 293 rq->cmd_type = REQ_TYPE_SPECIAL; 294 rq->rq_disk = floppy->disk; 295 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 296} 297 298static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive) 299{ 300 idefloppy_floppy_t *floppy = drive->driver_data; 301 302 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 303 floppy->pc_stack_index = 0; 304 return (&floppy->pc_stack[floppy->pc_stack_index++]); 305} 306 307static struct request *idefloppy_next_rq_storage(ide_drive_t *drive) 308{ 309 idefloppy_floppy_t *floppy = drive->driver_data; 310 311 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 312 floppy->rq_stack_index = 0; 313 return (&floppy->rq_stack[floppy->rq_stack_index++]); 314} 315 316static void idefloppy_request_sense_callback(ide_drive_t *drive) 317{ 318 idefloppy_floppy_t *floppy = drive->driver_data; 319 u8 *buf = floppy->pc->buf; 320 321 debug_log("Reached %s\n", __func__); 322 323 if (!floppy->pc->error) { 324 floppy->sense_key = buf[2] & 0x0F; 325 floppy->asc = buf[12]; 326 floppy->ascq = buf[13]; 327 floppy->progress_indication = buf[15] & 0x80 ? 328 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 329 330 if (floppy->failed_pc) 331 debug_log("pc = %x, sense key = %x, asc = %x," 332 " ascq = %x\n", 333 floppy->failed_pc->c[0], 334 floppy->sense_key, 335 floppy->asc, 336 floppy->ascq); 337 else 338 debug_log("sense key = %x, asc = %x, ascq = %x\n", 339 floppy->sense_key, 340 floppy->asc, 341 floppy->ascq); 342 343 344 idefloppy_end_request(drive, 1, 0); 345 } else { 346 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting" 347 " request!\n"); 348 idefloppy_end_request(drive, 0, 0); 349 } 350} 351 352/* General packet command callback function. */ 353static void idefloppy_pc_callback(ide_drive_t *drive) 354{ 355 idefloppy_floppy_t *floppy = drive->driver_data; 356 357 debug_log("Reached %s\n", __func__); 358 359 idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0); 360} 361 362static void idefloppy_init_pc(struct ide_atapi_pc *pc) 363{ 364 memset(pc->c, 0, 12); 365 pc->retries = 0; 366 pc->flags = 0; 367 pc->req_xfer = 0; 368 pc->buf = pc->pc_buf; 369 pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE; 370 pc->idefloppy_callback = &idefloppy_pc_callback; 371} 372 373static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc) 374{ 375 idefloppy_init_pc(pc); 376 pc->c[0] = GPCMD_REQUEST_SENSE; 377 pc->c[4] = 255; 378 pc->req_xfer = 18; 379 pc->idefloppy_callback = &idefloppy_request_sense_callback; 380} 381 382/* 383 * Called when an error was detected during the last packet command. We queue a 384 * request sense packet command in the head of the request list. 385 */ 386static void idefloppy_retry_pc(ide_drive_t *drive) 387{ 388 struct ide_atapi_pc *pc; 389 struct request *rq; 390 391 (void)ide_read_error(drive); 392 pc = idefloppy_next_pc_storage(drive); 393 rq = idefloppy_next_rq_storage(drive); 394 idefloppy_create_request_sense_cmd(pc); 395 idefloppy_queue_pc_head(drive, pc, rq); 396} 397 398/* The usual interrupt handler called during a packet command. */ 399static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) 400{ 401 idefloppy_floppy_t *floppy = drive->driver_data; 402 ide_hwif_t *hwif = drive->hwif; 403 struct ide_atapi_pc *pc = floppy->pc; 404 struct request *rq = pc->rq; 405 xfer_func_t *xferfunc; 406 unsigned int temp; 407 int dma_error = 0; 408 u16 bcount; 409 u8 stat, ireason; 410 411 debug_log("Reached %s interrupt handler\n", __func__); 412 413 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { 414 dma_error = hwif->dma_ops->dma_end(drive); 415 if (dma_error) { 416 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 417 rq_data_dir(rq) ? "write" : "read"); 418 pc->flags |= PC_FLAG_DMA_ERROR; 419 } else { 420 pc->xferred = pc->req_xfer; 421 idefloppy_update_buffers(drive, pc); 422 } 423 debug_log("DMA finished\n"); 424 } 425 426 /* Clear the interrupt */ 427 stat = ide_read_status(drive); 428 429 /* No more interrupts */ 430 if ((stat & DRQ_STAT) == 0) { 431 debug_log("Packet command completed, %d bytes transferred\n", 432 pc->xferred); 433 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; 434 435 local_irq_enable_in_hardirq(); 436 437 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) { 438 /* Error detected */ 439 debug_log("%s: I/O error\n", drive->name); 440 rq->errors++; 441 if (pc->c[0] == GPCMD_REQUEST_SENSE) { 442 printk(KERN_ERR "ide-floppy: I/O error in " 443 "request sense command\n"); 444 return ide_do_reset(drive); 445 } 446 /* Retry operation */ 447 idefloppy_retry_pc(drive); 448 /* queued, but not started */ 449 return ide_stopped; 450 } 451 pc->error = 0; 452 if (floppy->failed_pc == pc) 453 floppy->failed_pc = NULL; 454 /* Command finished - Call the callback function */ 455 pc->idefloppy_callback(drive); 456 return ide_stopped; 457 } 458 459 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { 460 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; 461 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 462 "more interrupts in DMA mode\n"); 463 ide_dma_off(drive); 464 return ide_do_reset(drive); 465 } 466 467 /* Get the number of bytes to transfer */ 468 bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) | 469 hwif->INB(hwif->io_ports.lbam_addr); 470 /* on this interrupt */ 471 ireason = hwif->INB(hwif->io_ports.nsect_addr); 472 473 if (ireason & CD) { 474 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__); 475 return ide_do_reset(drive); 476 } 477 if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) { 478 /* Hopefully, we will never get here */ 479 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 480 (ireason & IO) ? "Write" : "Read"); 481 printk(KERN_ERR "but the floppy wants us to %s !\n", 482 (ireason & IO) ? "Read" : "Write"); 483 return ide_do_reset(drive); 484 } 485 if (!(pc->flags & PC_FLAG_WRITING)) { 486 /* Reading - Check that we have enough space */ 487 temp = pc->xferred + bcount; 488 if (temp > pc->req_xfer) { 489 if (temp > pc->buf_size) { 490 printk(KERN_ERR "ide-floppy: The floppy wants " 491 "to send us more data than expected " 492 "- discarding data\n"); 493 ide_atapi_discard_data(drive, bcount); 494 495 ide_set_handler(drive, 496 &idefloppy_pc_intr, 497 IDEFLOPPY_WAIT_CMD, 498 NULL); 499 return ide_started; 500 } 501 debug_log("The floppy wants to send us more data than" 502 " expected - allowing transfer\n"); 503 } 504 } 505 if (pc->flags & PC_FLAG_WRITING) 506 xferfunc = hwif->atapi_output_bytes; 507 else 508 xferfunc = hwif->atapi_input_bytes; 509 510 if (pc->buf) 511 xferfunc(drive, pc->cur_pos, bcount); 512 else 513 ide_floppy_io_buffers(drive, pc, bcount, 514 !!(pc->flags & PC_FLAG_WRITING)); 515 516 /* Update the current position */ 517 pc->xferred += bcount; 518 pc->cur_pos += bcount; 519 520 /* And set the interrupt handler again */ 521 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 522 return ide_started; 523} 524 525/* 526 * This is the original routine that did the packet transfer. 527 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 528 * for that drive below. The algorithm is chosen based on drive type 529 */ 530static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive) 531{ 532 ide_hwif_t *hwif = drive->hwif; 533 ide_startstop_t startstop; 534 idefloppy_floppy_t *floppy = drive->driver_data; 535 u8 ireason; 536 537 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 538 printk(KERN_ERR "ide-floppy: Strange, packet command " 539 "initiated yet DRQ isn't asserted\n"); 540 return startstop; 541 } 542 ireason = hwif->INB(hwif->io_ports.nsect_addr); 543 if ((ireason & CD) == 0 || (ireason & IO)) { 544 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 545 "issuing a packet command\n"); 546 return ide_do_reset(drive); 547 } 548 549 /* Set the interrupt routine */ 550 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 551 /* Send the actual packet */ 552 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 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 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 573 /* Timeout for the packet command */ 574 return IDEFLOPPY_WAIT_CMD; 575} 576 577static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive) 578{ 579 ide_hwif_t *hwif = drive->hwif; 580 idefloppy_floppy_t *floppy = drive->driver_data; 581 ide_startstop_t startstop; 582 u8 ireason; 583 584 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 585 printk(KERN_ERR "ide-floppy: Strange, packet command " 586 "initiated yet DRQ isn't asserted\n"); 587 return startstop; 588 } 589 ireason = hwif->INB(hwif->io_ports.nsect_addr); 590 if ((ireason & CD) == 0 || (ireason & IO)) { 591 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 592 "while issuing a packet command\n"); 593 return ide_do_reset(drive); 594 } 595 /* 596 * The following delay solves a problem with ATAPI Zip 100 drives 597 * where the Busy flag was apparently being deasserted before the 598 * unit was ready to receive data. This was happening on a 599 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 600 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 601 * used until after the packet is moved in about 50 msec. 602 */ 603 604 ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks, 605 &idefloppy_transfer_pc2); 606 return ide_started; 607} 608 609static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 610 struct ide_atapi_pc *pc) 611{ 612 /* supress error messages resulting from Medium not present */ 613 if (floppy->sense_key == 0x02 && 614 floppy->asc == 0x3a && 615 floppy->ascq == 0x00) 616 return; 617 618 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " 619 "asc = %2x, ascq = %2x\n", 620 floppy->drive->name, pc->c[0], floppy->sense_key, 621 floppy->asc, floppy->ascq); 622 623} 624 625static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, 626 struct ide_atapi_pc *pc) 627{ 628 idefloppy_floppy_t *floppy = drive->driver_data; 629 ide_hwif_t *hwif = drive->hwif; 630 ide_handler_t *pkt_xfer_routine; 631 u16 bcount; 632 u8 dma; 633 634 if (floppy->failed_pc == NULL && 635 pc->c[0] != GPCMD_REQUEST_SENSE) 636 floppy->failed_pc = pc; 637 /* Set the current packet command */ 638 floppy->pc = pc; 639 640 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { 641 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) 642 ide_floppy_report_error(floppy, pc); 643 /* Giving up */ 644 pc->error = IDEFLOPPY_ERROR_GENERAL; 645 646 floppy->failed_pc = NULL; 647 pc->idefloppy_callback(drive); 648 return ide_stopped; 649 } 650 651 debug_log("Retry number - %d\n", pc->retries); 652 653 pc->retries++; 654 /* We haven't transferred any data yet */ 655 pc->xferred = 0; 656 pc->cur_pos = pc->buf; 657 bcount = min(pc->req_xfer, 63 * 1024); 658 659 if (pc->flags & PC_FLAG_DMA_ERROR) { 660 pc->flags &= ~PC_FLAG_DMA_ERROR; 661 ide_dma_off(drive); 662 } 663 dma = 0; 664 665 if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma) 666 dma = !hwif->dma_ops->dma_setup(drive); 667 668 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK | 669 IDE_TFLAG_OUT_DEVICE, bcount, dma); 670 671 if (dma) { 672 /* Begin DMA, if necessary */ 673 pc->flags |= PC_FLAG_DMA_IN_PROGRESS; 674 hwif->dma_ops->dma_start(drive); 675 } 676 677 /* Can we transfer the packet when we get the interrupt or wait? */ 678 if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) { 679 /* wait */ 680 pkt_xfer_routine = &idefloppy_transfer_pc1; 681 } else { 682 /* immediate */ 683 pkt_xfer_routine = &idefloppy_transfer_pc; 684 } 685 686 if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) { 687 /* Issue the packet command */ 688 ide_execute_command(drive, WIN_PACKETCMD, 689 pkt_xfer_routine, 690 IDEFLOPPY_WAIT_CMD, 691 NULL); 692 return ide_started; 693 } else { 694 /* Issue the packet command */ 695 hwif->OUTB(WIN_PACKETCMD, hwif->io_ports.command_addr); 696 return (*pkt_xfer_routine) (drive); 697 } 698} 699 700static void idefloppy_rw_callback(ide_drive_t *drive) 701{ 702 debug_log("Reached %s\n", __func__); 703 704 idefloppy_end_request(drive, 1, 0); 705 return; 706} 707 708static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent) 709{ 710 debug_log("creating prevent removal command, prevent = %d\n", prevent); 711 712 idefloppy_init_pc(pc); 713 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; 714 pc->c[4] = prevent; 715} 716 717static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) 718{ 719 idefloppy_init_pc(pc); 720 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 721 pc->c[7] = 255; 722 pc->c[8] = 255; 723 pc->req_xfer = 255; 724} 725 726static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b, 727 int l, int flags) 728{ 729 idefloppy_init_pc(pc); 730 pc->c[0] = GPCMD_FORMAT_UNIT; 731 pc->c[1] = 0x17; 732 733 memset(pc->buf, 0, 12); 734 pc->buf[1] = 0xA2; 735 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 736 737 if (flags & 1) /* Verify bit on... */ 738 pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */ 739 pc->buf[3] = 8; 740 741 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4])); 742 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8])); 743 pc->buf_size = 12; 744 pc->flags |= PC_FLAG_WRITING; 745} 746 747/* A mode sense command is used to "sense" floppy parameters. */ 748static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, 749 u8 page_code, u8 type) 750{ 751 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 752 753 idefloppy_init_pc(pc); 754 pc->c[0] = GPCMD_MODE_SENSE_10; 755 pc->c[1] = 0; 756 pc->c[2] = page_code + (type << 6); 757 758 switch (page_code) { 759 case IDEFLOPPY_CAPABILITIES_PAGE: 760 length += 12; 761 break; 762 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 763 length += 32; 764 break; 765 default: 766 printk(KERN_ERR "ide-floppy: unsupported page code " 767 "in create_mode_sense_cmd\n"); 768 } 769 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 770 pc->req_xfer = length; 771} 772 773static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start) 774{ 775 idefloppy_init_pc(pc); 776 pc->c[0] = GPCMD_START_STOP_UNIT; 777 pc->c[4] = start; 778} 779 780static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc) 781{ 782 idefloppy_init_pc(pc); 783 pc->c[0] = GPCMD_TEST_UNIT_READY; 784} 785 786static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, 787 struct ide_atapi_pc *pc, struct request *rq, 788 unsigned long sector) 789{ 790 int block = sector / floppy->bs_factor; 791 int blocks = rq->nr_sectors / floppy->bs_factor; 792 int cmd = rq_data_dir(rq); 793 794 debug_log("create_rw10_cmd: block == %d, blocks == %d\n", 795 block, blocks); 796 797 idefloppy_init_pc(pc); 798 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 799 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 800 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 801 802 pc->idefloppy_callback = &idefloppy_rw_callback; 803 pc->rq = rq; 804 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 805 if (rq->cmd_flags & REQ_RW) 806 pc->flags |= PC_FLAG_WRITING; 807 pc->buf = NULL; 808 pc->req_xfer = pc->buf_size = blocks * floppy->block_size; 809 pc->flags |= PC_FLAG_DMA_RECOMMENDED; 810} 811 812static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, 813 struct ide_atapi_pc *pc, struct request *rq) 814{ 815 idefloppy_init_pc(pc); 816 pc->idefloppy_callback = &idefloppy_rw_callback; 817 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 818 pc->rq = rq; 819 pc->b_count = rq->data_len; 820 if (rq->data_len && rq_data_dir(rq) == WRITE) 821 pc->flags |= PC_FLAG_WRITING; 822 pc->buf = rq->data; 823 if (rq->bio) 824 pc->flags |= PC_FLAG_DMA_RECOMMENDED; 825 /* 826 * possibly problematic, doesn't look like ide-floppy correctly 827 * handled scattered requests if dma fails... 828 */ 829 pc->req_xfer = pc->buf_size = rq->data_len; 830} 831 832static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, 833 struct request *rq, sector_t block_s) 834{ 835 idefloppy_floppy_t *floppy = drive->driver_data; 836 struct ide_atapi_pc *pc; 837 unsigned long block = (unsigned long)block_s; 838 839 debug_log("dev: %s, cmd_type: %x, errors: %d\n", 840 rq->rq_disk ? rq->rq_disk->disk_name : "?", 841 rq->cmd_type, rq->errors); 842 debug_log("sector: %ld, nr_sectors: %ld, " 843 "current_nr_sectors: %d\n", (long)rq->sector, 844 rq->nr_sectors, rq->current_nr_sectors); 845 846 if (rq->errors >= ERROR_MAX) { 847 if (floppy->failed_pc) 848 ide_floppy_report_error(floppy, floppy->failed_pc); 849 else 850 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 851 drive->name); 852 idefloppy_end_request(drive, 0, 0); 853 return ide_stopped; 854 } 855 if (blk_fs_request(rq)) { 856 if (((long)rq->sector % floppy->bs_factor) || 857 (rq->nr_sectors % floppy->bs_factor)) { 858 printk(KERN_ERR "%s: unsupported r/w request size\n", 859 drive->name); 860 idefloppy_end_request(drive, 0, 0); 861 return ide_stopped; 862 } 863 pc = idefloppy_next_pc_storage(drive); 864 idefloppy_create_rw_cmd(floppy, pc, rq, block); 865 } else if (blk_special_request(rq)) { 866 pc = (struct ide_atapi_pc *) rq->buffer; 867 } else if (blk_pc_request(rq)) { 868 pc = idefloppy_next_pc_storage(drive); 869 idefloppy_blockpc_cmd(floppy, pc, rq); 870 } else { 871 blk_dump_rq_flags(rq, 872 "ide-floppy: unsupported command in queue"); 873 idefloppy_end_request(drive, 0, 0); 874 return ide_stopped; 875 } 876 877 pc->rq = rq; 878 return idefloppy_issue_pc(drive, pc); 879} 880 881/* 882 * Add a special packet command request to the tail of the request queue, 883 * and wait for it to be serviced. 884 */ 885static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc) 886{ 887 struct ide_floppy_obj *floppy = drive->driver_data; 888 struct request rq; 889 890 ide_init_drive_cmd(&rq); 891 rq.buffer = (char *) pc; 892 rq.cmd_type = REQ_TYPE_SPECIAL; 893 rq.rq_disk = floppy->disk; 894 895 return ide_do_drive_cmd(drive, &rq, ide_wait); 896} 897 898/* 899 * Look at the flexible disk page parameters. We ignore the CHS capacity 900 * parameters and use the LBA parameters instead. 901 */ 902static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 903{ 904 idefloppy_floppy_t *floppy = drive->driver_data; 905 struct ide_atapi_pc pc; 906 u8 *page; 907 int capacity, lba_capacity; 908 u16 transfer_rate, sector_size, cyls, rpm; 909 u8 heads, sectors; 910 911 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, 912 MODE_SENSE_CURRENT); 913 914 if (idefloppy_queue_pc_tail(drive, &pc)) { 915 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 916 " parameters\n"); 917 return 1; 918 } 919 floppy->wp = !!(pc.buf[3] & 0x80); 920 set_disk_ro(floppy->disk, floppy->wp); 921 page = &pc.buf[8]; 922 923 transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]); 924 sector_size = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]); 925 cyls = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]); 926 rpm = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]); 927 heads = pc.buf[8 + 4]; 928 sectors = pc.buf[8 + 5]; 929 930 capacity = cyls * heads * sectors * sector_size; 931 932 if (memcmp(page, &floppy->flexible_disk_page, 32)) 933 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 934 "%d sector size, %d rpm\n", 935 drive->name, capacity / 1024, cyls, heads, 936 sectors, transfer_rate / 8, sector_size, rpm); 937 938 memcpy(&floppy->flexible_disk_page, page, 32); 939 drive->bios_cyl = cyls; 940 drive->bios_head = heads; 941 drive->bios_sect = sectors; 942 lba_capacity = floppy->blocks * floppy->block_size; 943 944 if (capacity < lba_capacity) { 945 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 946 "bytes, but the drive only handles %d\n", 947 drive->name, lba_capacity, capacity); 948 floppy->blocks = floppy->block_size ? 949 capacity / floppy->block_size : 0; 950 } 951 return 0; 952} 953 954static int idefloppy_get_sfrp_bit(ide_drive_t *drive) 955{ 956 idefloppy_floppy_t *floppy = drive->driver_data; 957 struct ide_atapi_pc pc; 958 959 floppy->srfp = 0; 960 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 961 MODE_SENSE_CURRENT); 962 963 pc.flags |= PC_FLAG_SUPPRESS_ERROR; 964 if (idefloppy_queue_pc_tail(drive, &pc)) 965 return 1; 966 967 floppy->srfp = pc.buf[8 + 2] & 0x40; 968 return (0); 969} 970 971/* 972 * Determine if a media is present in the floppy drive, and if so, its LBA 973 * capacity. 974 */ 975static int ide_floppy_get_capacity(ide_drive_t *drive) 976{ 977 idefloppy_floppy_t *floppy = drive->driver_data; 978 struct ide_atapi_pc pc; 979 u8 *cap_desc; 980 u8 header_len, desc_cnt; 981 int i, rc = 1, blocks, length; 982 983 drive->bios_cyl = 0; 984 drive->bios_head = drive->bios_sect = 0; 985 floppy->blocks = 0; 986 floppy->bs_factor = 1; 987 set_capacity(floppy->disk, 0); 988 989 idefloppy_create_read_capacity_cmd(&pc); 990 if (idefloppy_queue_pc_tail(drive, &pc)) { 991 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 992 return 1; 993 } 994 header_len = pc.buf[3]; 995 cap_desc = &pc.buf[4]; 996 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 997 998 for (i = 0; i < desc_cnt; i++) { 999 unsigned int desc_start = 4 + i*8; 1000 1001 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]); 1002 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]); 1003 1004 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 1005 i, blocks * length / 1024, blocks, length); 1006 1007 if (i) 1008 continue; 1009 /* 1010 * the code below is valid only for the 1st descriptor, ie i=0 1011 */ 1012 1013 switch (pc.buf[desc_start + 4] & 0x03) { 1014 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1015 case CAPACITY_UNFORMATTED: 1016 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) 1017 /* 1018 * If it is not a clik drive, break out 1019 * (maintains previous driver behaviour) 1020 */ 1021 break; 1022 case CAPACITY_CURRENT: 1023 /* Normal Zip/LS-120 disks */ 1024 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 1025 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1026 "sector size\n", drive->name, 1027 blocks * length / 1024, blocks, length); 1028 memcpy(&floppy->cap_desc, cap_desc, 8); 1029 1030 if (!length || length % 512) { 1031 printk(KERN_NOTICE "%s: %d bytes block size " 1032 "not supported\n", drive->name, length); 1033 } else { 1034 floppy->blocks = blocks; 1035 floppy->block_size = length; 1036 floppy->bs_factor = length / 512; 1037 if (floppy->bs_factor != 1) 1038 printk(KERN_NOTICE "%s: warning: non " 1039 "512 bytes block size not " 1040 "fully supported\n", 1041 drive->name); 1042 rc = 0; 1043 } 1044 break; 1045 case CAPACITY_NO_CARTRIDGE: 1046 /* 1047 * This is a KERN_ERR so it appears on screen 1048 * for the user to see 1049 */ 1050 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1051 break; 1052 case CAPACITY_INVALID: 1053 printk(KERN_ERR "%s: Invalid capacity for disk " 1054 "in drive\n", drive->name); 1055 break; 1056 } 1057 debug_log("Descriptor 0 Code: %d\n", 1058 pc.buf[desc_start + 4] & 0x03); 1059 } 1060 1061 /* Clik! disk does not support get_flexible_disk_page */ 1062 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) 1063 (void) ide_floppy_get_flexible_disk_page(drive); 1064 1065 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1066 return rc; 1067} 1068 1069/* 1070 * Obtain the list of formattable capacities. 1071 * Very similar to ide_floppy_get_capacity, except that we push the capacity 1072 * descriptors to userland, instead of our own structures. 1073 * 1074 * Userland gives us the following structure: 1075 * 1076 * struct idefloppy_format_capacities { 1077 * int nformats; 1078 * struct { 1079 * int nblocks; 1080 * int blocksize; 1081 * } formats[]; 1082 * }; 1083 * 1084 * userland initializes nformats to the number of allocated formats[] records. 1085 * On exit we set nformats to the number of records we've actually initialized. 1086 */ 1087 1088static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1089{ 1090 struct ide_atapi_pc pc; 1091 u8 header_len, desc_cnt; 1092 int i, blocks, length, u_array_size, u_index; 1093 int __user *argp; 1094 1095 if (get_user(u_array_size, arg)) 1096 return (-EFAULT); 1097 1098 if (u_array_size <= 0) 1099 return (-EINVAL); 1100 1101 idefloppy_create_read_capacity_cmd(&pc); 1102 if (idefloppy_queue_pc_tail(drive, &pc)) { 1103 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1104 return (-EIO); 1105 } 1106 header_len = pc.buf[3]; 1107 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 1108 1109 u_index = 0; 1110 argp = arg + 1; 1111 1112 /* 1113 * We always skip the first capacity descriptor. That's the current 1114 * capacity. We are interested in the remaining descriptors, the 1115 * formattable capacities. 1116 */ 1117 for (i = 1; i < desc_cnt; i++) { 1118 unsigned int desc_start = 4 + i*8; 1119 1120 if (u_index >= u_array_size) 1121 break; /* User-supplied buffer too small */ 1122 1123 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]); 1124 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]); 1125 1126 if (put_user(blocks, argp)) 1127 return(-EFAULT); 1128 ++argp; 1129 1130 if (put_user(length, argp)) 1131 return (-EFAULT); 1132 ++argp; 1133 1134 ++u_index; 1135 } 1136 1137 if (put_user(u_index, arg)) 1138 return (-EFAULT); 1139 return (0); 1140} 1141 1142/* 1143 * Get ATAPI_FORMAT_UNIT progress indication. 1144 * 1145 * Userland gives a pointer to an int. The int is set to a progress 1146 * indicator 0-65536, with 65536=100%. 1147 * 1148 * If the drive does not support format progress indication, we just check 1149 * the dsc bit, and return either 0 or 65536. 1150 */ 1151 1152static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1153{ 1154 idefloppy_floppy_t *floppy = drive->driver_data; 1155 struct ide_atapi_pc pc; 1156 int progress_indication = 0x10000; 1157 1158 if (floppy->srfp) { 1159 idefloppy_create_request_sense_cmd(&pc); 1160 if (idefloppy_queue_pc_tail(drive, &pc)) 1161 return (-EIO); 1162 1163 if (floppy->sense_key == 2 && 1164 floppy->asc == 4 && 1165 floppy->ascq == 4) 1166 progress_indication = floppy->progress_indication; 1167 1168 /* Else assume format_unit has finished, and we're at 0x10000 */ 1169 } else { 1170 unsigned long flags; 1171 u8 stat; 1172 1173 local_irq_save(flags); 1174 stat = ide_read_status(drive); 1175 local_irq_restore(flags); 1176 1177 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; 1178 } 1179 if (put_user(progress_indication, arg)) 1180 return (-EFAULT); 1181 1182 return (0); 1183} 1184 1185static sector_t idefloppy_capacity(ide_drive_t *drive) 1186{ 1187 idefloppy_floppy_t *floppy = drive->driver_data; 1188 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1189 1190 return capacity; 1191} 1192 1193/* 1194 * Check whether we can support a drive, based on the ATAPI IDENTIFY command 1195 * results. 1196 */ 1197static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id) 1198{ 1199 u8 gcw[2]; 1200 u8 device_type, protocol, removable, drq_type, packet_size; 1201 1202 *((u16 *) &gcw) = id->config; 1203 1204 device_type = gcw[1] & 0x1F; 1205 removable = (gcw[0] & 0x80) >> 7; 1206 protocol = (gcw[1] & 0xC0) >> 6; 1207 drq_type = (gcw[0] & 0x60) >> 5; 1208 packet_size = gcw[0] & 0x03; 1209 1210#ifdef CONFIG_PPC 1211 /* kludge for Apple PowerBook internal zip */ 1212 if (device_type == 5 && 1213 !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP")) 1214 device_type = 0; 1215#endif 1216 1217 if (protocol != 2) 1218 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n", 1219 protocol); 1220 else if (device_type != 0) 1221 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set " 1222 "to floppy\n", device_type); 1223 else if (!removable) 1224 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1225 else if (drq_type == 3) 1226 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not " 1227 "supported\n", drq_type); 1228 else if (packet_size != 0) 1229 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 " 1230 "bytes\n", packet_size); 1231 else 1232 return 1; 1233 return 0; 1234} 1235 1236#ifdef CONFIG_IDE_PROC_FS 1237static void idefloppy_add_settings(ide_drive_t *drive) 1238{ 1239 idefloppy_floppy_t *floppy = drive->driver_data; 1240 1241 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, 1242 &drive->bios_cyl, NULL); 1243 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1244 &drive->bios_head, NULL); 1245 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, 1246 &drive->bios_sect, NULL); 1247 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1248 &floppy->ticks, NULL); 1249} 1250#else 1251static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1252#endif 1253 1254static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) 1255{ 1256 u8 gcw[2]; 1257 1258 *((u16 *) &gcw) = drive->id->config; 1259 floppy->pc = floppy->pc_stack; 1260 1261 if (((gcw[0] & 0x60) >> 5) == 1) 1262 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT; 1263 /* 1264 * We used to check revisions here. At this point however I'm giving up. 1265 * Just assume they are all broken, its easier. 1266 * 1267 * The actual reason for the workarounds was likely a driver bug after 1268 * all rather than a firmware bug, and the workaround below used to hide 1269 * it. It should be fixed as of version 1.9, but to be on the safe side 1270 * we'll leave the limitation below for the 2.2.x tree. 1271 */ 1272 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1273 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE; 1274 /* This value will be visible in the /proc/ide/hdx/settings */ 1275 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1276 blk_queue_max_sectors(drive->queue, 64); 1277 } 1278 1279 /* 1280 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes 1281 * nasty clicking noises without it, so please don't remove this. 1282 */ 1283 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1284 blk_queue_max_sectors(drive->queue, 64); 1285 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE; 1286 } 1287 1288 (void) ide_floppy_get_capacity(drive); 1289 idefloppy_add_settings(drive); 1290} 1291 1292static void ide_floppy_remove(ide_drive_t *drive) 1293{ 1294 idefloppy_floppy_t *floppy = drive->driver_data; 1295 struct gendisk *g = floppy->disk; 1296 1297 ide_proc_unregister_driver(drive, floppy->driver); 1298 1299 del_gendisk(g); 1300 1301 ide_floppy_put(floppy); 1302} 1303 1304static void idefloppy_cleanup_obj(struct kref *kref) 1305{ 1306 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1307 ide_drive_t *drive = floppy->drive; 1308 struct gendisk *g = floppy->disk; 1309 1310 drive->driver_data = NULL; 1311 g->private_data = NULL; 1312 put_disk(g); 1313 kfree(floppy); 1314} 1315 1316#ifdef CONFIG_IDE_PROC_FS 1317static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, 1318 int count, int *eof, void *data) 1319{ 1320 ide_drive_t*drive = (ide_drive_t *)data; 1321 int len; 1322 1323 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); 1324 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1325} 1326 1327static ide_proc_entry_t idefloppy_proc[] = { 1328 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1329 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1330 { NULL, 0, NULL, NULL } 1331}; 1332#endif /* CONFIG_IDE_PROC_FS */ 1333 1334static int ide_floppy_probe(ide_drive_t *); 1335 1336static ide_driver_t idefloppy_driver = { 1337 .gen_driver = { 1338 .owner = THIS_MODULE, 1339 .name = "ide-floppy", 1340 .bus = &ide_bus_type, 1341 }, 1342 .probe = ide_floppy_probe, 1343 .remove = ide_floppy_remove, 1344 .version = IDEFLOPPY_VERSION, 1345 .media = ide_floppy, 1346 .supports_dsc_overlap = 0, 1347 .do_request = idefloppy_do_request, 1348 .end_request = idefloppy_end_request, 1349 .error = __ide_error, 1350 .abort = __ide_abort, 1351#ifdef CONFIG_IDE_PROC_FS 1352 .proc = idefloppy_proc, 1353#endif 1354}; 1355 1356static int idefloppy_open(struct inode *inode, struct file *filp) 1357{ 1358 struct gendisk *disk = inode->i_bdev->bd_disk; 1359 struct ide_floppy_obj *floppy; 1360 ide_drive_t *drive; 1361 struct ide_atapi_pc pc; 1362 int ret = 0; 1363 1364 debug_log("Reached %s\n", __func__); 1365 1366 floppy = ide_floppy_get(disk); 1367 if (!floppy) 1368 return -ENXIO; 1369 1370 drive = floppy->drive; 1371 1372 floppy->openers++; 1373 1374 if (floppy->openers == 1) { 1375 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1376 /* Just in case */ 1377 1378 idefloppy_create_test_unit_ready_cmd(&pc); 1379 if (idefloppy_queue_pc_tail(drive, &pc)) { 1380 idefloppy_create_start_stop_cmd(&pc, 1); 1381 (void) idefloppy_queue_pc_tail(drive, &pc); 1382 } 1383 1384 if (ide_floppy_get_capacity(drive) 1385 && (filp->f_flags & O_NDELAY) == 0 1386 /* 1387 * Allow O_NDELAY to open a drive without a disk, or with an 1388 * unreadable disk, so that we can get the format capacity 1389 * of the drive or begin the format - Sam 1390 */ 1391 ) { 1392 ret = -EIO; 1393 goto out_put_floppy; 1394 } 1395 1396 if (floppy->wp && (filp->f_mode & 2)) { 1397 ret = -EROFS; 1398 goto out_put_floppy; 1399 } 1400 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED; 1401 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1402 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1403 idefloppy_create_prevent_cmd(&pc, 1); 1404 (void) idefloppy_queue_pc_tail(drive, &pc); 1405 } 1406 check_disk_change(inode->i_bdev); 1407 } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) { 1408 ret = -EBUSY; 1409 goto out_put_floppy; 1410 } 1411 return 0; 1412 1413out_put_floppy: 1414 floppy->openers--; 1415 ide_floppy_put(floppy); 1416 return ret; 1417} 1418 1419static int idefloppy_release(struct inode *inode, struct file *filp) 1420{ 1421 struct gendisk *disk = inode->i_bdev->bd_disk; 1422 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1423 ide_drive_t *drive = floppy->drive; 1424 struct ide_atapi_pc pc; 1425 1426 debug_log("Reached %s\n", __func__); 1427 1428 if (floppy->openers == 1) { 1429 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1430 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1431 idefloppy_create_prevent_cmd(&pc, 0); 1432 (void) idefloppy_queue_pc_tail(drive, &pc); 1433 } 1434 1435 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1436 } 1437 1438 floppy->openers--; 1439 1440 ide_floppy_put(floppy); 1441 1442 return 0; 1443} 1444 1445static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1446{ 1447 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1448 ide_drive_t *drive = floppy->drive; 1449 1450 geo->heads = drive->bios_head; 1451 geo->sectors = drive->bios_sect; 1452 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1453 return 0; 1454} 1455 1456static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, 1457 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd) 1458{ 1459 if (floppy->openers > 1) 1460 return -EBUSY; 1461 1462 /* The IOMEGA Clik! Drive doesn't support this command - 1463 * no room for an eject mechanism */ 1464 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1465 int prevent = arg ? 1 : 0; 1466 1467 if (cmd == CDROMEJECT) 1468 prevent = 0; 1469 1470 idefloppy_create_prevent_cmd(pc, prevent); 1471 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1472 } 1473 1474 if (cmd == CDROMEJECT) { 1475 idefloppy_create_start_stop_cmd(pc, 2); 1476 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1477 } 1478 1479 return 0; 1480} 1481 1482static int ide_floppy_format_unit(idefloppy_floppy_t *floppy, 1483 int __user *arg) 1484{ 1485 int blocks, length, flags, err = 0; 1486 struct ide_atapi_pc pc; 1487 1488 if (floppy->openers > 1) { 1489 /* Don't format if someone is using the disk */ 1490 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1491 return -EBUSY; 1492 } 1493 1494 floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1495 1496 /* 1497 * Send ATAPI_FORMAT_UNIT to the drive. 1498 * 1499 * Userland gives us the following structure: 1500 * 1501 * struct idefloppy_format_command { 1502 * int nblocks; 1503 * int blocksize; 1504 * int flags; 1505 * } ; 1506 * 1507 * flags is a bitmask, currently, the only defined flag is: 1508 * 1509 * 0x01 - verify media after format. 1510 */ 1511 if (get_user(blocks, arg) || 1512 get_user(length, arg+1) || 1513 get_user(flags, arg+2)) { 1514 err = -EFAULT; 1515 goto out; 1516 } 1517 1518 (void) idefloppy_get_sfrp_bit(floppy->drive); 1519 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1520 1521 if (idefloppy_queue_pc_tail(floppy->drive, &pc)) 1522 err = -EIO; 1523 1524out: 1525 if (err) 1526 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1527 return err; 1528} 1529 1530 1531static int idefloppy_ioctl(struct inode *inode, struct file *file, 1532 unsigned int cmd, unsigned long arg) 1533{ 1534 struct block_device *bdev = inode->i_bdev; 1535 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1536 ide_drive_t *drive = floppy->drive; 1537 struct ide_atapi_pc pc; 1538 void __user *argp = (void __user *)arg; 1539 int err; 1540 1541 switch (cmd) { 1542 case CDROMEJECT: 1543 /* fall through */ 1544 case CDROM_LOCKDOOR: 1545 return ide_floppy_lockdoor(floppy, &pc, arg, cmd); 1546 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1547 return 0; 1548 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1549 return ide_floppy_get_format_capacities(drive, argp); 1550 case IDEFLOPPY_IOCTL_FORMAT_START: 1551 if (!(file->f_mode & 2)) 1552 return -EPERM; 1553 1554 return ide_floppy_format_unit(floppy, (int __user *)arg); 1555 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1556 return idefloppy_get_format_progress(drive, argp); 1557 } 1558 1559 /* 1560 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 1561 * and CDROM_SEND_PACKET (legacy) ioctls 1562 */ 1563 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 1564 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 1565 bdev->bd_disk, cmd, argp); 1566 else 1567 err = -ENOTTY; 1568 1569 if (err == -ENOTTY) 1570 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 1571 1572 return err; 1573} 1574 1575static int idefloppy_media_changed(struct gendisk *disk) 1576{ 1577 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1578 ide_drive_t *drive = floppy->drive; 1579 int ret; 1580 1581 /* do not scan partitions twice if this is a removable device */ 1582 if (drive->attach) { 1583 drive->attach = 0; 1584 return 0; 1585 } 1586 ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED); 1587 floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED; 1588 return ret; 1589} 1590 1591static int idefloppy_revalidate_disk(struct gendisk *disk) 1592{ 1593 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1594 set_capacity(disk, idefloppy_capacity(floppy->drive)); 1595 return 0; 1596} 1597 1598static struct block_device_operations idefloppy_ops = { 1599 .owner = THIS_MODULE, 1600 .open = idefloppy_open, 1601 .release = idefloppy_release, 1602 .ioctl = idefloppy_ioctl, 1603 .getgeo = idefloppy_getgeo, 1604 .media_changed = idefloppy_media_changed, 1605 .revalidate_disk = idefloppy_revalidate_disk 1606}; 1607 1608static int ide_floppy_probe(ide_drive_t *drive) 1609{ 1610 idefloppy_floppy_t *floppy; 1611 struct gendisk *g; 1612 1613 if (!strstr("ide-floppy", drive->driver_req)) 1614 goto failed; 1615 if (!drive->present) 1616 goto failed; 1617 if (drive->media != ide_floppy) 1618 goto failed; 1619 if (!idefloppy_identify_device(drive, drive->id)) { 1620 printk(KERN_ERR "ide-floppy: %s: not supported by this version" 1621 " of ide-floppy\n", drive->name); 1622 goto failed; 1623 } 1624 if (drive->scsi) { 1625 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi" 1626 " emulation.\n", drive->name); 1627 goto failed; 1628 } 1629 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); 1630 if (!floppy) { 1631 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy" 1632 " structure\n", drive->name); 1633 goto failed; 1634 } 1635 1636 g = alloc_disk(1 << PARTN_BITS); 1637 if (!g) 1638 goto out_free_floppy; 1639 1640 ide_init_disk(g, drive); 1641 1642 ide_proc_register_driver(drive, &idefloppy_driver); 1643 1644 kref_init(&floppy->kref); 1645 1646 floppy->drive = drive; 1647 floppy->driver = &idefloppy_driver; 1648 floppy->disk = g; 1649 1650 g->private_data = &floppy->driver; 1651 1652 drive->driver_data = floppy; 1653 1654 idefloppy_setup(drive, floppy); 1655 1656 g->minors = 1 << PARTN_BITS; 1657 g->driverfs_dev = &drive->gendev; 1658 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 1659 g->fops = &idefloppy_ops; 1660 drive->attach = 1; 1661 add_disk(g); 1662 return 0; 1663 1664out_free_floppy: 1665 kfree(floppy); 1666failed: 1667 return -ENODEV; 1668} 1669 1670static void __exit idefloppy_exit(void) 1671{ 1672 driver_unregister(&idefloppy_driver.gen_driver); 1673} 1674 1675static int __init idefloppy_init(void) 1676{ 1677 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 1678 return driver_register(&idefloppy_driver.gen_driver); 1679} 1680 1681MODULE_ALIAS("ide:*m-floppy*"); 1682module_init(idefloppy_init); 1683module_exit(idefloppy_exit); 1684MODULE_LICENSE("GPL"); 1685MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1686 1687