ide-floppy.c revision 568ca92774d2f6be4a7e2f8357559bfdc9424056
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 blk_rq_init(NULL, rq); 290 rq->buffer = (char *) pc; 291 rq->cmd_type = REQ_TYPE_SPECIAL; 292 rq->cmd_flags |= REQ_PREEMPT; 293 rq->rq_disk = floppy->disk; 294 ide_do_drive_cmd(drive, rq); 295} 296 297static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive) 298{ 299 idefloppy_floppy_t *floppy = drive->driver_data; 300 301 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 302 floppy->pc_stack_index = 0; 303 return (&floppy->pc_stack[floppy->pc_stack_index++]); 304} 305 306static struct request *idefloppy_next_rq_storage(ide_drive_t *drive) 307{ 308 idefloppy_floppy_t *floppy = drive->driver_data; 309 310 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 311 floppy->rq_stack_index = 0; 312 return (&floppy->rq_stack[floppy->rq_stack_index++]); 313} 314 315static void idefloppy_request_sense_callback(ide_drive_t *drive) 316{ 317 idefloppy_floppy_t *floppy = drive->driver_data; 318 u8 *buf = floppy->pc->buf; 319 320 debug_log("Reached %s\n", __func__); 321 322 if (!floppy->pc->error) { 323 floppy->sense_key = buf[2] & 0x0F; 324 floppy->asc = buf[12]; 325 floppy->ascq = buf[13]; 326 floppy->progress_indication = buf[15] & 0x80 ? 327 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 328 329 if (floppy->failed_pc) 330 debug_log("pc = %x, sense key = %x, asc = %x," 331 " ascq = %x\n", 332 floppy->failed_pc->c[0], 333 floppy->sense_key, 334 floppy->asc, 335 floppy->ascq); 336 else 337 debug_log("sense key = %x, asc = %x, ascq = %x\n", 338 floppy->sense_key, 339 floppy->asc, 340 floppy->ascq); 341 342 343 idefloppy_end_request(drive, 1, 0); 344 } else { 345 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting" 346 " request!\n"); 347 idefloppy_end_request(drive, 0, 0); 348 } 349} 350 351/* General packet command callback function. */ 352static void idefloppy_pc_callback(ide_drive_t *drive) 353{ 354 idefloppy_floppy_t *floppy = drive->driver_data; 355 356 debug_log("Reached %s\n", __func__); 357 358 idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0); 359} 360 361static void idefloppy_init_pc(struct ide_atapi_pc *pc) 362{ 363 memset(pc->c, 0, 12); 364 pc->retries = 0; 365 pc->flags = 0; 366 pc->req_xfer = 0; 367 pc->buf = pc->pc_buf; 368 pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE; 369 pc->idefloppy_callback = &idefloppy_pc_callback; 370} 371 372static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc) 373{ 374 idefloppy_init_pc(pc); 375 pc->c[0] = GPCMD_REQUEST_SENSE; 376 pc->c[4] = 255; 377 pc->req_xfer = 18; 378 pc->idefloppy_callback = &idefloppy_request_sense_callback; 379} 380 381/* 382 * Called when an error was detected during the last packet command. We queue a 383 * request sense packet command in the head of the request list. 384 */ 385static void idefloppy_retry_pc(ide_drive_t *drive) 386{ 387 struct ide_atapi_pc *pc; 388 struct request *rq; 389 390 (void)ide_read_error(drive); 391 pc = idefloppy_next_pc_storage(drive); 392 rq = idefloppy_next_rq_storage(drive); 393 idefloppy_create_request_sense_cmd(pc); 394 idefloppy_queue_pc_head(drive, pc, rq); 395} 396 397/* The usual interrupt handler called during a packet command. */ 398static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) 399{ 400 idefloppy_floppy_t *floppy = drive->driver_data; 401 ide_hwif_t *hwif = drive->hwif; 402 struct ide_atapi_pc *pc = floppy->pc; 403 struct request *rq = pc->rq; 404 xfer_func_t *xferfunc; 405 unsigned int temp; 406 int dma_error = 0; 407 u16 bcount; 408 u8 stat, ireason; 409 410 debug_log("Reached %s interrupt handler\n", __func__); 411 412 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { 413 dma_error = hwif->dma_ops->dma_end(drive); 414 if (dma_error) { 415 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 416 rq_data_dir(rq) ? "write" : "read"); 417 pc->flags |= PC_FLAG_DMA_ERROR; 418 } else { 419 pc->xferred = pc->req_xfer; 420 idefloppy_update_buffers(drive, pc); 421 } 422 debug_log("DMA finished\n"); 423 } 424 425 /* Clear the interrupt */ 426 stat = ide_read_status(drive); 427 428 /* No more interrupts */ 429 if ((stat & DRQ_STAT) == 0) { 430 debug_log("Packet command completed, %d bytes transferred\n", 431 pc->xferred); 432 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; 433 434 local_irq_enable_in_hardirq(); 435 436 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) { 437 /* Error detected */ 438 debug_log("%s: I/O error\n", drive->name); 439 rq->errors++; 440 if (pc->c[0] == GPCMD_REQUEST_SENSE) { 441 printk(KERN_ERR "%s: I/O error in request sense" 442 " command\n", drive->name); 443 return ide_do_reset(drive); 444 } 445 /* Retry operation */ 446 idefloppy_retry_pc(drive); 447 /* queued, but not started */ 448 return ide_stopped; 449 } 450 pc->error = 0; 451 if (floppy->failed_pc == pc) 452 floppy->failed_pc = NULL; 453 /* Command finished - Call the callback function */ 454 pc->idefloppy_callback(drive); 455 return ide_stopped; 456 } 457 458 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { 459 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; 460 printk(KERN_ERR "%s: The device wants to issue more interrupts " 461 "in DMA mode\n", drive->name); 462 ide_dma_off(drive); 463 return ide_do_reset(drive); 464 } 465 466 /* Get the number of bytes to transfer */ 467 bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) | 468 hwif->INB(hwif->io_ports.lbam_addr); 469 /* on this interrupt */ 470 ireason = hwif->INB(hwif->io_ports.nsect_addr); 471 472 if (ireason & CD) { 473 printk(KERN_ERR "%s: CoD != 0 in %s\n", drive->name, __func__); 474 return ide_do_reset(drive); 475 } 476 if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) { 477 /* Hopefully, we will never get here */ 478 printk(KERN_ERR "%s: We wanted to %s, but the device wants us " 479 "to %s!\n", drive->name, 480 (ireason & IO) ? "Write" : "Read", 481 (ireason & IO) ? "Read" : "Write"); 482 return ide_do_reset(drive); 483 } 484 if (!(pc->flags & PC_FLAG_WRITING)) { 485 /* Reading - Check that we have enough space */ 486 temp = pc->xferred + bcount; 487 if (temp > pc->req_xfer) { 488 if (temp > pc->buf_size) { 489 printk(KERN_ERR "%s: The device wants to send " 490 "us more data than expected - " 491 "discarding data\n", 492 drive->name); 493 ide_pad_transfer(drive, 0, 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 device wants to send us more data than " 502 "expected - allowing transfer\n"); 503 } 504 } 505 if (pc->flags & PC_FLAG_WRITING) 506 xferfunc = hwif->output_data; 507 else 508 xferfunc = hwif->input_data; 509 510 if (pc->buf) 511 xferfunc(drive, NULL, 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 * What we have here is a classic case of a top half / bottom half interrupt 527 * service routine. In interrupt mode, the device sends an interrupt to signal 528 * that it is ready to receive a packet. However, we need to delay about 2-3 529 * ticks before issuing the packet or we gets in trouble. 530 * 531 * So, follow carefully. transfer_pc1 is called as an interrupt (or directly). 532 * In either case, when the device says it's ready for a packet, we schedule 533 * the packet transfer to occur about 2-3 ticks later in transfer_pc2. 534 */ 535static int idefloppy_transfer_pc2(ide_drive_t *drive) 536{ 537 idefloppy_floppy_t *floppy = drive->driver_data; 538 539 /* Send the actual packet */ 540 drive->hwif->output_data(drive, NULL, floppy->pc->c, 12); 541 542 /* Timeout for the packet command */ 543 return IDEFLOPPY_WAIT_CMD; 544} 545 546static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive) 547{ 548 ide_hwif_t *hwif = drive->hwif; 549 idefloppy_floppy_t *floppy = drive->driver_data; 550 ide_expiry_t *expiry; 551 unsigned int timeout; 552 ide_startstop_t startstop; 553 u8 ireason; 554 555 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 556 printk(KERN_ERR "%s: Strange, packet command initiated yet " 557 "DRQ isn't asserted\n", drive->name); 558 return startstop; 559 } 560 ireason = hwif->INB(hwif->io_ports.nsect_addr); 561 if ((ireason & CD) == 0 || (ireason & IO)) { 562 printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing " 563 "a packet command\n", drive->name); 564 return ide_do_reset(drive); 565 } 566 /* 567 * The following delay solves a problem with ATAPI Zip 100 drives 568 * where the Busy flag was apparently being deasserted before the 569 * unit was ready to receive data. This was happening on a 570 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 571 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 572 * used until after the packet is moved in about 50 msec. 573 */ 574 if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) { 575 timeout = floppy->ticks; 576 expiry = &idefloppy_transfer_pc2; 577 } else { 578 timeout = IDEFLOPPY_WAIT_CMD; 579 expiry = NULL; 580 } 581 582 ide_set_handler(drive, &idefloppy_pc_intr, timeout, expiry); 583 584 if ((floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) == 0) 585 /* Send the actual packet */ 586 hwif->output_data(drive, NULL, floppy->pc->c, 12); 587 588 return ide_started; 589} 590 591static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 592 struct ide_atapi_pc *pc) 593{ 594 /* supress error messages resulting from Medium not present */ 595 if (floppy->sense_key == 0x02 && 596 floppy->asc == 0x3a && 597 floppy->ascq == 0x00) 598 return; 599 600 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " 601 "asc = %2x, ascq = %2x\n", 602 floppy->drive->name, pc->c[0], floppy->sense_key, 603 floppy->asc, floppy->ascq); 604 605} 606 607static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, 608 struct ide_atapi_pc *pc) 609{ 610 idefloppy_floppy_t *floppy = drive->driver_data; 611 ide_hwif_t *hwif = drive->hwif; 612 u16 bcount; 613 u8 dma; 614 615 if (floppy->failed_pc == NULL && 616 pc->c[0] != GPCMD_REQUEST_SENSE) 617 floppy->failed_pc = pc; 618 /* Set the current packet command */ 619 floppy->pc = pc; 620 621 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { 622 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) 623 ide_floppy_report_error(floppy, pc); 624 /* Giving up */ 625 pc->error = IDEFLOPPY_ERROR_GENERAL; 626 627 floppy->failed_pc = NULL; 628 pc->idefloppy_callback(drive); 629 return ide_stopped; 630 } 631 632 debug_log("Retry number - %d\n", pc->retries); 633 634 pc->retries++; 635 /* We haven't transferred any data yet */ 636 pc->xferred = 0; 637 pc->cur_pos = pc->buf; 638 bcount = min(pc->req_xfer, 63 * 1024); 639 640 if (pc->flags & PC_FLAG_DMA_ERROR) { 641 pc->flags &= ~PC_FLAG_DMA_ERROR; 642 ide_dma_off(drive); 643 } 644 dma = 0; 645 646 if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma) 647 dma = !hwif->dma_ops->dma_setup(drive); 648 649 ide_pktcmd_tf_load(drive, IDE_TFLAG_OUT_DEVICE, bcount, dma); 650 651 if (dma) { 652 /* Begin DMA, if necessary */ 653 pc->flags |= PC_FLAG_DMA_IN_PROGRESS; 654 hwif->dma_ops->dma_start(drive); 655 } 656 657 if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) { 658 /* Issue the packet command */ 659 ide_execute_command(drive, WIN_PACKETCMD, 660 &idefloppy_transfer_pc1, 661 IDEFLOPPY_WAIT_CMD, 662 NULL); 663 return ide_started; 664 } else { 665 /* Issue the packet command */ 666 ide_execute_pkt_cmd(drive); 667 return idefloppy_transfer_pc1(drive); 668 } 669} 670 671static void idefloppy_rw_callback(ide_drive_t *drive) 672{ 673 debug_log("Reached %s\n", __func__); 674 675 idefloppy_end_request(drive, 1, 0); 676 return; 677} 678 679static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent) 680{ 681 debug_log("creating prevent removal command, prevent = %d\n", prevent); 682 683 idefloppy_init_pc(pc); 684 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; 685 pc->c[4] = prevent; 686} 687 688static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) 689{ 690 idefloppy_init_pc(pc); 691 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 692 pc->c[7] = 255; 693 pc->c[8] = 255; 694 pc->req_xfer = 255; 695} 696 697static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b, 698 int l, int flags) 699{ 700 idefloppy_init_pc(pc); 701 pc->c[0] = GPCMD_FORMAT_UNIT; 702 pc->c[1] = 0x17; 703 704 memset(pc->buf, 0, 12); 705 pc->buf[1] = 0xA2; 706 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 707 708 if (flags & 1) /* Verify bit on... */ 709 pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */ 710 pc->buf[3] = 8; 711 712 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4])); 713 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8])); 714 pc->buf_size = 12; 715 pc->flags |= PC_FLAG_WRITING; 716} 717 718/* A mode sense command is used to "sense" floppy parameters. */ 719static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, 720 u8 page_code, u8 type) 721{ 722 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 723 724 idefloppy_init_pc(pc); 725 pc->c[0] = GPCMD_MODE_SENSE_10; 726 pc->c[1] = 0; 727 pc->c[2] = page_code + (type << 6); 728 729 switch (page_code) { 730 case IDEFLOPPY_CAPABILITIES_PAGE: 731 length += 12; 732 break; 733 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 734 length += 32; 735 break; 736 default: 737 printk(KERN_ERR "ide-floppy: unsupported page code " 738 "in create_mode_sense_cmd\n"); 739 } 740 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 741 pc->req_xfer = length; 742} 743 744static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start) 745{ 746 idefloppy_init_pc(pc); 747 pc->c[0] = GPCMD_START_STOP_UNIT; 748 pc->c[4] = start; 749} 750 751static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc) 752{ 753 idefloppy_init_pc(pc); 754 pc->c[0] = GPCMD_TEST_UNIT_READY; 755} 756 757static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, 758 struct ide_atapi_pc *pc, struct request *rq, 759 unsigned long sector) 760{ 761 int block = sector / floppy->bs_factor; 762 int blocks = rq->nr_sectors / floppy->bs_factor; 763 int cmd = rq_data_dir(rq); 764 765 debug_log("create_rw10_cmd: block == %d, blocks == %d\n", 766 block, blocks); 767 768 idefloppy_init_pc(pc); 769 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 770 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 771 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 772 773 pc->idefloppy_callback = &idefloppy_rw_callback; 774 pc->rq = rq; 775 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 776 if (rq->cmd_flags & REQ_RW) 777 pc->flags |= PC_FLAG_WRITING; 778 pc->buf = NULL; 779 pc->req_xfer = pc->buf_size = blocks * floppy->block_size; 780 pc->flags |= PC_FLAG_DMA_RECOMMENDED; 781} 782 783static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, 784 struct ide_atapi_pc *pc, struct request *rq) 785{ 786 idefloppy_init_pc(pc); 787 pc->idefloppy_callback = &idefloppy_rw_callback; 788 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 789 pc->rq = rq; 790 pc->b_count = rq->data_len; 791 if (rq->data_len && rq_data_dir(rq) == WRITE) 792 pc->flags |= PC_FLAG_WRITING; 793 pc->buf = rq->data; 794 if (rq->bio) 795 pc->flags |= PC_FLAG_DMA_RECOMMENDED; 796 /* 797 * possibly problematic, doesn't look like ide-floppy correctly 798 * handled scattered requests if dma fails... 799 */ 800 pc->req_xfer = pc->buf_size = rq->data_len; 801} 802 803static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, 804 struct request *rq, sector_t block_s) 805{ 806 idefloppy_floppy_t *floppy = drive->driver_data; 807 struct ide_atapi_pc *pc; 808 unsigned long block = (unsigned long)block_s; 809 810 debug_log("dev: %s, cmd_type: %x, errors: %d\n", 811 rq->rq_disk ? rq->rq_disk->disk_name : "?", 812 rq->cmd_type, rq->errors); 813 debug_log("sector: %ld, nr_sectors: %ld, " 814 "current_nr_sectors: %d\n", (long)rq->sector, 815 rq->nr_sectors, rq->current_nr_sectors); 816 817 if (rq->errors >= ERROR_MAX) { 818 if (floppy->failed_pc) 819 ide_floppy_report_error(floppy, floppy->failed_pc); 820 else 821 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 822 drive->name); 823 idefloppy_end_request(drive, 0, 0); 824 return ide_stopped; 825 } 826 if (blk_fs_request(rq)) { 827 if (((long)rq->sector % floppy->bs_factor) || 828 (rq->nr_sectors % floppy->bs_factor)) { 829 printk(KERN_ERR "%s: unsupported r/w request size\n", 830 drive->name); 831 idefloppy_end_request(drive, 0, 0); 832 return ide_stopped; 833 } 834 pc = idefloppy_next_pc_storage(drive); 835 idefloppy_create_rw_cmd(floppy, pc, rq, block); 836 } else if (blk_special_request(rq)) { 837 pc = (struct ide_atapi_pc *) rq->buffer; 838 } else if (blk_pc_request(rq)) { 839 pc = idefloppy_next_pc_storage(drive); 840 idefloppy_blockpc_cmd(floppy, pc, rq); 841 } else { 842 blk_dump_rq_flags(rq, 843 "ide-floppy: unsupported command in queue"); 844 idefloppy_end_request(drive, 0, 0); 845 return ide_stopped; 846 } 847 848 pc->rq = rq; 849 return idefloppy_issue_pc(drive, pc); 850} 851 852/* 853 * Add a special packet command request to the tail of the request queue, 854 * and wait for it to be serviced. 855 */ 856static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc) 857{ 858 struct ide_floppy_obj *floppy = drive->driver_data; 859 struct request *rq; 860 int error; 861 862 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 863 rq->buffer = (char *) pc; 864 rq->cmd_type = REQ_TYPE_SPECIAL; 865 error = blk_execute_rq(drive->queue, floppy->disk, rq, 0); 866 blk_put_request(rq); 867 868 return error; 869} 870 871/* 872 * Look at the flexible disk page parameters. We ignore the CHS capacity 873 * parameters and use the LBA parameters instead. 874 */ 875static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 876{ 877 idefloppy_floppy_t *floppy = drive->driver_data; 878 struct ide_atapi_pc pc; 879 u8 *page; 880 int capacity, lba_capacity; 881 u16 transfer_rate, sector_size, cyls, rpm; 882 u8 heads, sectors; 883 884 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, 885 MODE_SENSE_CURRENT); 886 887 if (idefloppy_queue_pc_tail(drive, &pc)) { 888 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 889 " parameters\n"); 890 return 1; 891 } 892 floppy->wp = !!(pc.buf[3] & 0x80); 893 set_disk_ro(floppy->disk, floppy->wp); 894 page = &pc.buf[8]; 895 896 transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]); 897 sector_size = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]); 898 cyls = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]); 899 rpm = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]); 900 heads = pc.buf[8 + 4]; 901 sectors = pc.buf[8 + 5]; 902 903 capacity = cyls * heads * sectors * sector_size; 904 905 if (memcmp(page, &floppy->flexible_disk_page, 32)) 906 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 907 "%d sector size, %d rpm\n", 908 drive->name, capacity / 1024, cyls, heads, 909 sectors, transfer_rate / 8, sector_size, rpm); 910 911 memcpy(&floppy->flexible_disk_page, page, 32); 912 drive->bios_cyl = cyls; 913 drive->bios_head = heads; 914 drive->bios_sect = sectors; 915 lba_capacity = floppy->blocks * floppy->block_size; 916 917 if (capacity < lba_capacity) { 918 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 919 "bytes, but the drive only handles %d\n", 920 drive->name, lba_capacity, capacity); 921 floppy->blocks = floppy->block_size ? 922 capacity / floppy->block_size : 0; 923 } 924 return 0; 925} 926 927static int idefloppy_get_sfrp_bit(ide_drive_t *drive) 928{ 929 idefloppy_floppy_t *floppy = drive->driver_data; 930 struct ide_atapi_pc pc; 931 932 floppy->srfp = 0; 933 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 934 MODE_SENSE_CURRENT); 935 936 pc.flags |= PC_FLAG_SUPPRESS_ERROR; 937 if (idefloppy_queue_pc_tail(drive, &pc)) 938 return 1; 939 940 floppy->srfp = pc.buf[8 + 2] & 0x40; 941 return (0); 942} 943 944/* 945 * Determine if a media is present in the floppy drive, and if so, its LBA 946 * capacity. 947 */ 948static int ide_floppy_get_capacity(ide_drive_t *drive) 949{ 950 idefloppy_floppy_t *floppy = drive->driver_data; 951 struct ide_atapi_pc pc; 952 u8 *cap_desc; 953 u8 header_len, desc_cnt; 954 int i, rc = 1, blocks, length; 955 956 drive->bios_cyl = 0; 957 drive->bios_head = drive->bios_sect = 0; 958 floppy->blocks = 0; 959 floppy->bs_factor = 1; 960 set_capacity(floppy->disk, 0); 961 962 idefloppy_create_read_capacity_cmd(&pc); 963 if (idefloppy_queue_pc_tail(drive, &pc)) { 964 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 965 return 1; 966 } 967 header_len = pc.buf[3]; 968 cap_desc = &pc.buf[4]; 969 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 970 971 for (i = 0; i < desc_cnt; i++) { 972 unsigned int desc_start = 4 + i*8; 973 974 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]); 975 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]); 976 977 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 978 i, blocks * length / 1024, blocks, length); 979 980 if (i) 981 continue; 982 /* 983 * the code below is valid only for the 1st descriptor, ie i=0 984 */ 985 986 switch (pc.buf[desc_start + 4] & 0x03) { 987 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 988 case CAPACITY_UNFORMATTED: 989 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) 990 /* 991 * If it is not a clik drive, break out 992 * (maintains previous driver behaviour) 993 */ 994 break; 995 case CAPACITY_CURRENT: 996 /* Normal Zip/LS-120 disks */ 997 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 998 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 999 "sector size\n", drive->name, 1000 blocks * length / 1024, blocks, length); 1001 memcpy(&floppy->cap_desc, cap_desc, 8); 1002 1003 if (!length || length % 512) { 1004 printk(KERN_NOTICE "%s: %d bytes block size " 1005 "not supported\n", drive->name, length); 1006 } else { 1007 floppy->blocks = blocks; 1008 floppy->block_size = length; 1009 floppy->bs_factor = length / 512; 1010 if (floppy->bs_factor != 1) 1011 printk(KERN_NOTICE "%s: warning: non " 1012 "512 bytes block size not " 1013 "fully supported\n", 1014 drive->name); 1015 rc = 0; 1016 } 1017 break; 1018 case CAPACITY_NO_CARTRIDGE: 1019 /* 1020 * This is a KERN_ERR so it appears on screen 1021 * for the user to see 1022 */ 1023 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1024 break; 1025 case CAPACITY_INVALID: 1026 printk(KERN_ERR "%s: Invalid capacity for disk " 1027 "in drive\n", drive->name); 1028 break; 1029 } 1030 debug_log("Descriptor 0 Code: %d\n", 1031 pc.buf[desc_start + 4] & 0x03); 1032 } 1033 1034 /* Clik! disk does not support get_flexible_disk_page */ 1035 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) 1036 (void) ide_floppy_get_flexible_disk_page(drive); 1037 1038 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1039 return rc; 1040} 1041 1042/* 1043 * Obtain the list of formattable capacities. 1044 * Very similar to ide_floppy_get_capacity, except that we push the capacity 1045 * descriptors to userland, instead of our own structures. 1046 * 1047 * Userland gives us the following structure: 1048 * 1049 * struct idefloppy_format_capacities { 1050 * int nformats; 1051 * struct { 1052 * int nblocks; 1053 * int blocksize; 1054 * } formats[]; 1055 * }; 1056 * 1057 * userland initializes nformats to the number of allocated formats[] records. 1058 * On exit we set nformats to the number of records we've actually initialized. 1059 */ 1060 1061static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1062{ 1063 struct ide_atapi_pc pc; 1064 u8 header_len, desc_cnt; 1065 int i, blocks, length, u_array_size, u_index; 1066 int __user *argp; 1067 1068 if (get_user(u_array_size, arg)) 1069 return (-EFAULT); 1070 1071 if (u_array_size <= 0) 1072 return (-EINVAL); 1073 1074 idefloppy_create_read_capacity_cmd(&pc); 1075 if (idefloppy_queue_pc_tail(drive, &pc)) { 1076 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1077 return (-EIO); 1078 } 1079 header_len = pc.buf[3]; 1080 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 1081 1082 u_index = 0; 1083 argp = arg + 1; 1084 1085 /* 1086 * We always skip the first capacity descriptor. That's the current 1087 * capacity. We are interested in the remaining descriptors, the 1088 * formattable capacities. 1089 */ 1090 for (i = 1; i < desc_cnt; i++) { 1091 unsigned int desc_start = 4 + i*8; 1092 1093 if (u_index >= u_array_size) 1094 break; /* User-supplied buffer too small */ 1095 1096 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]); 1097 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]); 1098 1099 if (put_user(blocks, argp)) 1100 return(-EFAULT); 1101 ++argp; 1102 1103 if (put_user(length, argp)) 1104 return (-EFAULT); 1105 ++argp; 1106 1107 ++u_index; 1108 } 1109 1110 if (put_user(u_index, arg)) 1111 return (-EFAULT); 1112 return (0); 1113} 1114 1115/* 1116 * Get ATAPI_FORMAT_UNIT progress indication. 1117 * 1118 * Userland gives a pointer to an int. The int is set to a progress 1119 * indicator 0-65536, with 65536=100%. 1120 * 1121 * If the drive does not support format progress indication, we just check 1122 * the dsc bit, and return either 0 or 65536. 1123 */ 1124 1125static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1126{ 1127 idefloppy_floppy_t *floppy = drive->driver_data; 1128 struct ide_atapi_pc pc; 1129 int progress_indication = 0x10000; 1130 1131 if (floppy->srfp) { 1132 idefloppy_create_request_sense_cmd(&pc); 1133 if (idefloppy_queue_pc_tail(drive, &pc)) 1134 return (-EIO); 1135 1136 if (floppy->sense_key == 2 && 1137 floppy->asc == 4 && 1138 floppy->ascq == 4) 1139 progress_indication = floppy->progress_indication; 1140 1141 /* Else assume format_unit has finished, and we're at 0x10000 */ 1142 } else { 1143 unsigned long flags; 1144 u8 stat; 1145 1146 local_irq_save(flags); 1147 stat = ide_read_status(drive); 1148 local_irq_restore(flags); 1149 1150 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; 1151 } 1152 if (put_user(progress_indication, arg)) 1153 return (-EFAULT); 1154 1155 return (0); 1156} 1157 1158static sector_t idefloppy_capacity(ide_drive_t *drive) 1159{ 1160 idefloppy_floppy_t *floppy = drive->driver_data; 1161 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1162 1163 return capacity; 1164} 1165 1166/* 1167 * Check whether we can support a drive, based on the ATAPI IDENTIFY command 1168 * results. 1169 */ 1170static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id) 1171{ 1172 u8 gcw[2]; 1173 u8 device_type, protocol, removable, drq_type, packet_size; 1174 1175 *((u16 *) &gcw) = id->config; 1176 1177 device_type = gcw[1] & 0x1F; 1178 removable = (gcw[0] & 0x80) >> 7; 1179 protocol = (gcw[1] & 0xC0) >> 6; 1180 drq_type = (gcw[0] & 0x60) >> 5; 1181 packet_size = gcw[0] & 0x03; 1182 1183#ifdef CONFIG_PPC 1184 /* kludge for Apple PowerBook internal zip */ 1185 if (device_type == 5 && 1186 !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP")) 1187 device_type = 0; 1188#endif 1189 1190 if (protocol != 2) 1191 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n", 1192 protocol); 1193 else if (device_type != 0) 1194 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set " 1195 "to floppy\n", device_type); 1196 else if (!removable) 1197 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1198 else if (drq_type == 3) 1199 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not " 1200 "supported\n", drq_type); 1201 else if (packet_size != 0) 1202 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 " 1203 "bytes\n", packet_size); 1204 else 1205 return 1; 1206 return 0; 1207} 1208 1209#ifdef CONFIG_IDE_PROC_FS 1210static void idefloppy_add_settings(ide_drive_t *drive) 1211{ 1212 idefloppy_floppy_t *floppy = drive->driver_data; 1213 1214 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, 1215 &drive->bios_cyl, NULL); 1216 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1217 &drive->bios_head, NULL); 1218 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, 1219 &drive->bios_sect, NULL); 1220 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1221 &floppy->ticks, NULL); 1222} 1223#else 1224static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1225#endif 1226 1227static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) 1228{ 1229 u8 gcw[2]; 1230 1231 *((u16 *) &gcw) = drive->id->config; 1232 floppy->pc = floppy->pc_stack; 1233 1234 if (((gcw[0] & 0x60) >> 5) == 1) 1235 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT; 1236 /* 1237 * We used to check revisions here. At this point however I'm giving up. 1238 * Just assume they are all broken, its easier. 1239 * 1240 * The actual reason for the workarounds was likely a driver bug after 1241 * all rather than a firmware bug, and the workaround below used to hide 1242 * it. It should be fixed as of version 1.9, but to be on the safe side 1243 * we'll leave the limitation below for the 2.2.x tree. 1244 */ 1245 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1246 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE; 1247 /* This value will be visible in the /proc/ide/hdx/settings */ 1248 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1249 blk_queue_max_sectors(drive->queue, 64); 1250 } 1251 1252 /* 1253 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes 1254 * nasty clicking noises without it, so please don't remove this. 1255 */ 1256 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1257 blk_queue_max_sectors(drive->queue, 64); 1258 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE; 1259 } 1260 1261 (void) ide_floppy_get_capacity(drive); 1262 idefloppy_add_settings(drive); 1263} 1264 1265static void ide_floppy_remove(ide_drive_t *drive) 1266{ 1267 idefloppy_floppy_t *floppy = drive->driver_data; 1268 struct gendisk *g = floppy->disk; 1269 1270 ide_proc_unregister_driver(drive, floppy->driver); 1271 1272 del_gendisk(g); 1273 1274 ide_floppy_put(floppy); 1275} 1276 1277static void idefloppy_cleanup_obj(struct kref *kref) 1278{ 1279 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1280 ide_drive_t *drive = floppy->drive; 1281 struct gendisk *g = floppy->disk; 1282 1283 drive->driver_data = NULL; 1284 g->private_data = NULL; 1285 put_disk(g); 1286 kfree(floppy); 1287} 1288 1289#ifdef CONFIG_IDE_PROC_FS 1290static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, 1291 int count, int *eof, void *data) 1292{ 1293 ide_drive_t*drive = (ide_drive_t *)data; 1294 int len; 1295 1296 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); 1297 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1298} 1299 1300static ide_proc_entry_t idefloppy_proc[] = { 1301 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1302 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1303 { NULL, 0, NULL, NULL } 1304}; 1305#endif /* CONFIG_IDE_PROC_FS */ 1306 1307static int ide_floppy_probe(ide_drive_t *); 1308 1309static ide_driver_t idefloppy_driver = { 1310 .gen_driver = { 1311 .owner = THIS_MODULE, 1312 .name = "ide-floppy", 1313 .bus = &ide_bus_type, 1314 }, 1315 .probe = ide_floppy_probe, 1316 .remove = ide_floppy_remove, 1317 .version = IDEFLOPPY_VERSION, 1318 .media = ide_floppy, 1319 .supports_dsc_overlap = 0, 1320 .do_request = idefloppy_do_request, 1321 .end_request = idefloppy_end_request, 1322 .error = __ide_error, 1323 .abort = __ide_abort, 1324#ifdef CONFIG_IDE_PROC_FS 1325 .proc = idefloppy_proc, 1326#endif 1327}; 1328 1329static int idefloppy_open(struct inode *inode, struct file *filp) 1330{ 1331 struct gendisk *disk = inode->i_bdev->bd_disk; 1332 struct ide_floppy_obj *floppy; 1333 ide_drive_t *drive; 1334 struct ide_atapi_pc pc; 1335 int ret = 0; 1336 1337 debug_log("Reached %s\n", __func__); 1338 1339 floppy = ide_floppy_get(disk); 1340 if (!floppy) 1341 return -ENXIO; 1342 1343 drive = floppy->drive; 1344 1345 floppy->openers++; 1346 1347 if (floppy->openers == 1) { 1348 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1349 /* Just in case */ 1350 1351 idefloppy_create_test_unit_ready_cmd(&pc); 1352 if (idefloppy_queue_pc_tail(drive, &pc)) { 1353 idefloppy_create_start_stop_cmd(&pc, 1); 1354 (void) idefloppy_queue_pc_tail(drive, &pc); 1355 } 1356 1357 if (ide_floppy_get_capacity(drive) 1358 && (filp->f_flags & O_NDELAY) == 0 1359 /* 1360 * Allow O_NDELAY to open a drive without a disk, or with an 1361 * unreadable disk, so that we can get the format capacity 1362 * of the drive or begin the format - Sam 1363 */ 1364 ) { 1365 ret = -EIO; 1366 goto out_put_floppy; 1367 } 1368 1369 if (floppy->wp && (filp->f_mode & 2)) { 1370 ret = -EROFS; 1371 goto out_put_floppy; 1372 } 1373 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED; 1374 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1375 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1376 idefloppy_create_prevent_cmd(&pc, 1); 1377 (void) idefloppy_queue_pc_tail(drive, &pc); 1378 } 1379 check_disk_change(inode->i_bdev); 1380 } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) { 1381 ret = -EBUSY; 1382 goto out_put_floppy; 1383 } 1384 return 0; 1385 1386out_put_floppy: 1387 floppy->openers--; 1388 ide_floppy_put(floppy); 1389 return ret; 1390} 1391 1392static int idefloppy_release(struct inode *inode, struct file *filp) 1393{ 1394 struct gendisk *disk = inode->i_bdev->bd_disk; 1395 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1396 ide_drive_t *drive = floppy->drive; 1397 struct ide_atapi_pc pc; 1398 1399 debug_log("Reached %s\n", __func__); 1400 1401 if (floppy->openers == 1) { 1402 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1403 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1404 idefloppy_create_prevent_cmd(&pc, 0); 1405 (void) idefloppy_queue_pc_tail(drive, &pc); 1406 } 1407 1408 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1409 } 1410 1411 floppy->openers--; 1412 1413 ide_floppy_put(floppy); 1414 1415 return 0; 1416} 1417 1418static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1419{ 1420 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1421 ide_drive_t *drive = floppy->drive; 1422 1423 geo->heads = drive->bios_head; 1424 geo->sectors = drive->bios_sect; 1425 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1426 return 0; 1427} 1428 1429static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, 1430 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd) 1431{ 1432 if (floppy->openers > 1) 1433 return -EBUSY; 1434 1435 /* The IOMEGA Clik! Drive doesn't support this command - 1436 * no room for an eject mechanism */ 1437 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1438 int prevent = arg ? 1 : 0; 1439 1440 if (cmd == CDROMEJECT) 1441 prevent = 0; 1442 1443 idefloppy_create_prevent_cmd(pc, prevent); 1444 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1445 } 1446 1447 if (cmd == CDROMEJECT) { 1448 idefloppy_create_start_stop_cmd(pc, 2); 1449 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1450 } 1451 1452 return 0; 1453} 1454 1455static int ide_floppy_format_unit(idefloppy_floppy_t *floppy, 1456 int __user *arg) 1457{ 1458 int blocks, length, flags, err = 0; 1459 struct ide_atapi_pc pc; 1460 1461 if (floppy->openers > 1) { 1462 /* Don't format if someone is using the disk */ 1463 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1464 return -EBUSY; 1465 } 1466 1467 floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1468 1469 /* 1470 * Send ATAPI_FORMAT_UNIT to the drive. 1471 * 1472 * Userland gives us the following structure: 1473 * 1474 * struct idefloppy_format_command { 1475 * int nblocks; 1476 * int blocksize; 1477 * int flags; 1478 * } ; 1479 * 1480 * flags is a bitmask, currently, the only defined flag is: 1481 * 1482 * 0x01 - verify media after format. 1483 */ 1484 if (get_user(blocks, arg) || 1485 get_user(length, arg+1) || 1486 get_user(flags, arg+2)) { 1487 err = -EFAULT; 1488 goto out; 1489 } 1490 1491 (void) idefloppy_get_sfrp_bit(floppy->drive); 1492 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1493 1494 if (idefloppy_queue_pc_tail(floppy->drive, &pc)) 1495 err = -EIO; 1496 1497out: 1498 if (err) 1499 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1500 return err; 1501} 1502 1503 1504static int idefloppy_ioctl(struct inode *inode, struct file *file, 1505 unsigned int cmd, unsigned long arg) 1506{ 1507 struct block_device *bdev = inode->i_bdev; 1508 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1509 ide_drive_t *drive = floppy->drive; 1510 struct ide_atapi_pc pc; 1511 void __user *argp = (void __user *)arg; 1512 int err; 1513 1514 switch (cmd) { 1515 case CDROMEJECT: 1516 /* fall through */ 1517 case CDROM_LOCKDOOR: 1518 return ide_floppy_lockdoor(floppy, &pc, arg, cmd); 1519 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1520 return 0; 1521 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1522 return ide_floppy_get_format_capacities(drive, argp); 1523 case IDEFLOPPY_IOCTL_FORMAT_START: 1524 if (!(file->f_mode & 2)) 1525 return -EPERM; 1526 1527 return ide_floppy_format_unit(floppy, (int __user *)arg); 1528 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1529 return idefloppy_get_format_progress(drive, argp); 1530 } 1531 1532 /* 1533 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 1534 * and CDROM_SEND_PACKET (legacy) ioctls 1535 */ 1536 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 1537 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 1538 bdev->bd_disk, cmd, argp); 1539 else 1540 err = -ENOTTY; 1541 1542 if (err == -ENOTTY) 1543 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 1544 1545 return err; 1546} 1547 1548static int idefloppy_media_changed(struct gendisk *disk) 1549{ 1550 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1551 ide_drive_t *drive = floppy->drive; 1552 int ret; 1553 1554 /* do not scan partitions twice if this is a removable device */ 1555 if (drive->attach) { 1556 drive->attach = 0; 1557 return 0; 1558 } 1559 ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED); 1560 floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED; 1561 return ret; 1562} 1563 1564static int idefloppy_revalidate_disk(struct gendisk *disk) 1565{ 1566 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1567 set_capacity(disk, idefloppy_capacity(floppy->drive)); 1568 return 0; 1569} 1570 1571static struct block_device_operations idefloppy_ops = { 1572 .owner = THIS_MODULE, 1573 .open = idefloppy_open, 1574 .release = idefloppy_release, 1575 .ioctl = idefloppy_ioctl, 1576 .getgeo = idefloppy_getgeo, 1577 .media_changed = idefloppy_media_changed, 1578 .revalidate_disk = idefloppy_revalidate_disk 1579}; 1580 1581static int ide_floppy_probe(ide_drive_t *drive) 1582{ 1583 idefloppy_floppy_t *floppy; 1584 struct gendisk *g; 1585 1586 if (!strstr("ide-floppy", drive->driver_req)) 1587 goto failed; 1588 if (!drive->present) 1589 goto failed; 1590 if (drive->media != ide_floppy) 1591 goto failed; 1592 if (!idefloppy_identify_device(drive, drive->id)) { 1593 printk(KERN_ERR "ide-floppy: %s: not supported by this version" 1594 " of ide-floppy\n", drive->name); 1595 goto failed; 1596 } 1597 if (drive->scsi) { 1598 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi" 1599 " emulation.\n", drive->name); 1600 goto failed; 1601 } 1602 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); 1603 if (!floppy) { 1604 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy" 1605 " structure\n", drive->name); 1606 goto failed; 1607 } 1608 1609 g = alloc_disk(1 << PARTN_BITS); 1610 if (!g) 1611 goto out_free_floppy; 1612 1613 ide_init_disk(g, drive); 1614 1615 ide_proc_register_driver(drive, &idefloppy_driver); 1616 1617 kref_init(&floppy->kref); 1618 1619 floppy->drive = drive; 1620 floppy->driver = &idefloppy_driver; 1621 floppy->disk = g; 1622 1623 g->private_data = &floppy->driver; 1624 1625 drive->driver_data = floppy; 1626 1627 idefloppy_setup(drive, floppy); 1628 1629 g->minors = 1 << PARTN_BITS; 1630 g->driverfs_dev = &drive->gendev; 1631 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 1632 g->fops = &idefloppy_ops; 1633 drive->attach = 1; 1634 add_disk(g); 1635 return 0; 1636 1637out_free_floppy: 1638 kfree(floppy); 1639failed: 1640 return -ENODEV; 1641} 1642 1643static void __exit idefloppy_exit(void) 1644{ 1645 driver_unregister(&idefloppy_driver.gen_driver); 1646} 1647 1648static int __init idefloppy_init(void) 1649{ 1650 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 1651 return driver_register(&idefloppy_driver.gen_driver); 1652} 1653 1654MODULE_ALIAS("ide:*m-floppy*"); 1655module_init(idefloppy_init); 1656module_exit(idefloppy_exit); 1657MODULE_LICENSE("GPL"); 1658MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1659 1660