ide-floppy.c revision 8e81bbba72453b74e4ceb1480546b1092184c11c
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 9/* 10 * The driver currently doesn't have any fancy features, just the bare 11 * minimum read/write support. 12 * 13 * This driver supports the following IDE floppy drives: 14 * 15 * LS-120/240 SuperDisk 16 * Iomega Zip 100/250 17 * Iomega PC Card Clik!/PocketZip 18 * 19 * For a historical changelog see 20 * Documentation/ide/ChangeLog.ide-floppy.1996-2002 21 */ 22 23#define IDEFLOPPY_VERSION "0.99.newide" 24 25#include <linux/module.h> 26#include <linux/types.h> 27#include <linux/string.h> 28#include <linux/kernel.h> 29#include <linux/delay.h> 30#include <linux/timer.h> 31#include <linux/mm.h> 32#include <linux/interrupt.h> 33#include <linux/major.h> 34#include <linux/errno.h> 35#include <linux/genhd.h> 36#include <linux/slab.h> 37#include <linux/cdrom.h> 38#include <linux/ide.h> 39#include <linux/bitops.h> 40#include <linux/mutex.h> 41 42#include <scsi/scsi_ioctl.h> 43 44#include <asm/byteorder.h> 45#include <linux/irq.h> 46#include <linux/uaccess.h> 47#include <linux/io.h> 48#include <asm/unaligned.h> 49 50/* 51 * The following are used to debug the driver. 52 */ 53#define IDEFLOPPY_DEBUG_LOG 0 54#define IDEFLOPPY_DEBUG_INFO 0 55#define IDEFLOPPY_DEBUG_BUGS 1 56 57/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 58#define IDEFLOPPY_DEBUG( fmt, args... ) 59 60#if IDEFLOPPY_DEBUG_LOG 61#define debug_log(fmt, args...) \ 62 printk(KERN_INFO "ide-floppy: " fmt, ## args) 63#else 64#define debug_log(fmt, args... ) do {} while(0) 65#endif 66 67 68/* 69 * Some drives require a longer irq timeout. 70 */ 71#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 72 73/* 74 * After each failed packet command we issue a request sense command 75 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. 76 */ 77#define IDEFLOPPY_MAX_PC_RETRIES 3 78 79/* 80 * With each packet command, we allocate a buffer of 81 * IDEFLOPPY_PC_BUFFER_SIZE bytes. 82 */ 83#define IDEFLOPPY_PC_BUFFER_SIZE 256 84 85/* 86 * In various places in the driver, we need to allocate storage 87 * for packet commands and requests, which will remain valid while 88 * we leave the driver to wait for an interrupt or a timeout event. 89 */ 90#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 91 92/* 93 * Our view of a packet command. 94 */ 95typedef struct idefloppy_packet_command_s { 96 u8 c[12]; /* Actual packet bytes */ 97 int retries; /* On each retry, we increment retries */ 98 int error; /* Error code */ 99 int request_transfer; /* Bytes to transfer */ 100 int actually_transferred; /* Bytes actually transferred */ 101 int buffer_size; /* Size of our data buffer */ 102 int b_count; /* Missing/Available data on the current buffer */ 103 struct request *rq; /* The corresponding request */ 104 u8 *buffer; /* Data buffer */ 105 u8 *current_position; /* Pointer into the above buffer */ 106 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ 107 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ 108 unsigned long flags; /* Status/Action bit flags: long for set_bit */ 109} idefloppy_pc_t; 110 111/* 112 * Packet command flag bits. 113 */ 114#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ 115#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ 116#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ 117#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ 118#define PC_WRITING 5 /* Data direction */ 119 120#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ 121 122/* 123 * Format capacity 124 */ 125typedef struct { 126 u8 reserved[3]; 127 u8 length; /* Length of the following descriptors in bytes */ 128} idefloppy_capacity_header_t; 129 130typedef struct { 131 u32 blocks; /* Number of blocks */ 132#if defined(__LITTLE_ENDIAN_BITFIELD) 133 unsigned dc :2; /* Descriptor Code */ 134 unsigned reserved :6; 135#elif defined(__BIG_ENDIAN_BITFIELD) 136 unsigned reserved :6; 137 unsigned dc :2; /* Descriptor Code */ 138#else 139#error "Bitfield endianness not defined! Check your byteorder.h" 140#endif 141 u8 length_msb; /* Block Length (MSB)*/ 142 u16 length; /* Block Length */ 143} idefloppy_capacity_descriptor_t; 144 145#define CAPACITY_INVALID 0x00 146#define CAPACITY_UNFORMATTED 0x01 147#define CAPACITY_CURRENT 0x02 148#define CAPACITY_NO_CARTRIDGE 0x03 149 150/* 151 * Most of our global data which we need to save even as we leave the 152 * driver due to an interrupt or a timer event is stored in a variable 153 * of type idefloppy_floppy_t, defined below. 154 */ 155typedef struct ide_floppy_obj { 156 ide_drive_t *drive; 157 ide_driver_t *driver; 158 struct gendisk *disk; 159 struct kref kref; 160 unsigned int openers; /* protected by BKL for now */ 161 162 /* Current packet command */ 163 idefloppy_pc_t *pc; 164 /* Last failed packet command */ 165 idefloppy_pc_t *failed_pc; 166 /* Packet command stack */ 167 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; 168 /* Next free packet command storage space */ 169 int pc_stack_index; 170 struct request rq_stack[IDEFLOPPY_PC_STACK]; 171 /* We implement a circular array */ 172 int rq_stack_index; 173 174 /* 175 * Last error information 176 */ 177 u8 sense_key, asc, ascq; 178 /* delay this long before sending packet command */ 179 u8 ticks; 180 int progress_indication; 181 182 /* 183 * Device information 184 */ 185 /* Current format */ 186 int blocks, block_size, bs_factor; 187 /* Last format capacity */ 188 idefloppy_capacity_descriptor_t capacity; 189 /* Copy of the flexible disk page */ 190 u8 flexible_disk_page[32]; 191 /* Write protect */ 192 int wp; 193 /* Supports format progress report */ 194 int srfp; 195 /* Status/Action flags */ 196 unsigned long flags; 197} idefloppy_floppy_t; 198 199#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 200 201/* 202 * Floppy flag bits values. 203 */ 204#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ 205#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ 206#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ 207#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ 208#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ 209#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ 210 211/* 212 * Defines for the mode sense command 213 */ 214#define MODE_SENSE_CURRENT 0x00 215#define MODE_SENSE_CHANGEABLE 0x01 216#define MODE_SENSE_DEFAULT 0x02 217#define MODE_SENSE_SAVED 0x03 218 219/* 220 * IOCTLs used in low-level formatting. 221 */ 222 223#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 224#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 225#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 226#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 227 228/* 229 * Error codes which are returned in rq->errors to the higher part 230 * of the driver. 231 */ 232#define IDEFLOPPY_ERROR_GENERAL 101 233 234/* 235 * The following is used to format the general configuration word of 236 * the ATAPI IDENTIFY DEVICE command. 237 */ 238struct idefloppy_id_gcw { 239#if defined(__LITTLE_ENDIAN_BITFIELD) 240 unsigned packet_size :2; /* Packet Size */ 241 unsigned reserved234 :3; /* Reserved */ 242 unsigned drq_type :2; /* Command packet DRQ type */ 243 unsigned removable :1; /* Removable media */ 244 unsigned device_type :5; /* Device type */ 245 unsigned reserved13 :1; /* Reserved */ 246 unsigned protocol :2; /* Protocol type */ 247#elif defined(__BIG_ENDIAN_BITFIELD) 248 unsigned protocol :2; /* Protocol type */ 249 unsigned reserved13 :1; /* Reserved */ 250 unsigned device_type :5; /* Device type */ 251 unsigned removable :1; /* Removable media */ 252 unsigned drq_type :2; /* Command packet DRQ type */ 253 unsigned reserved234 :3; /* Reserved */ 254 unsigned packet_size :2; /* Packet Size */ 255#else 256#error "Bitfield endianness not defined! Check your byteorder.h" 257#endif 258}; 259 260/* 261 * Pages of the SELECT SENSE / MODE SENSE packet commands. 262 * See SFF-8070i spec. 263 */ 264#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 265#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 266 267static DEFINE_MUTEX(idefloppy_ref_mutex); 268 269#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 270 271#define ide_floppy_g(disk) \ 272 container_of((disk)->private_data, struct ide_floppy_obj, driver) 273 274static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 275{ 276 struct ide_floppy_obj *floppy = NULL; 277 278 mutex_lock(&idefloppy_ref_mutex); 279 floppy = ide_floppy_g(disk); 280 if (floppy) 281 kref_get(&floppy->kref); 282 mutex_unlock(&idefloppy_ref_mutex); 283 return floppy; 284} 285 286static void idefloppy_cleanup_obj(struct kref *); 287 288static void ide_floppy_put(struct ide_floppy_obj *floppy) 289{ 290 mutex_lock(&idefloppy_ref_mutex); 291 kref_put(&floppy->kref, idefloppy_cleanup_obj); 292 mutex_unlock(&idefloppy_ref_mutex); 293} 294 295/* 296 * Too bad. The drive wants to send us data which we are not ready to accept. 297 * Just throw it away. 298 */ 299static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) 300{ 301 while (bcount--) 302 (void) HWIF(drive)->INB(IDE_DATA_REG); 303} 304 305#if IDEFLOPPY_DEBUG_BUGS 306static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) 307{ 308 while (bcount--) 309 HWIF(drive)->OUTB(0, IDE_DATA_REG); 310} 311#endif /* IDEFLOPPY_DEBUG_BUGS */ 312 313 314/* 315 * idefloppy_do_end_request is used to finish servicing a request. 316 * 317 * For read/write requests, we will call ide_end_request to pass to the 318 * next buffer. 319 */ 320static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) 321{ 322 idefloppy_floppy_t *floppy = drive->driver_data; 323 struct request *rq = HWGROUP(drive)->rq; 324 int error; 325 326 debug_log("Reached %s\n", __func__); 327 328 switch (uptodate) { 329 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 330 case 1: error = 0; break; 331 default: error = uptodate; 332 } 333 if (error) 334 floppy->failed_pc = NULL; 335 /* Why does this happen? */ 336 if (!rq) 337 return 0; 338 if (!blk_special_request(rq)) { 339 /* our real local end request function */ 340 ide_end_request(drive, uptodate, nsecs); 341 return 0; 342 } 343 rq->errors = error; 344 /* fixme: need to move this local also */ 345 ide_end_drive_cmd(drive, 0, 0); 346 return 0; 347} 348 349static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 350{ 351 struct request *rq = pc->rq; 352 struct bio_vec *bvec; 353 struct req_iterator iter; 354 unsigned long flags; 355 char *data; 356 int count, done = 0; 357 358 rq_for_each_segment(bvec, rq, iter) { 359 if (!bcount) 360 break; 361 362 count = min(bvec->bv_len, bcount); 363 364 data = bvec_kmap_irq(bvec, &flags); 365 drive->hwif->atapi_input_bytes(drive, data, count); 366 bvec_kunmap_irq(data, &flags); 367 368 bcount -= count; 369 pc->b_count += count; 370 done += count; 371 } 372 373 idefloppy_do_end_request(drive, 1, done >> 9); 374 375 if (bcount) { 376 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); 377 idefloppy_discard_data(drive, bcount); 378 } 379} 380 381static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 382{ 383 struct request *rq = pc->rq; 384 struct req_iterator iter; 385 struct bio_vec *bvec; 386 unsigned long flags; 387 int count, done = 0; 388 char *data; 389 390 rq_for_each_segment(bvec, rq, iter) { 391 if (!bcount) 392 break; 393 394 count = min(bvec->bv_len, bcount); 395 396 data = bvec_kmap_irq(bvec, &flags); 397 drive->hwif->atapi_output_bytes(drive, data, count); 398 bvec_kunmap_irq(data, &flags); 399 400 bcount -= count; 401 pc->b_count += count; 402 done += count; 403 } 404 405 idefloppy_do_end_request(drive, 1, done >> 9); 406 407#if IDEFLOPPY_DEBUG_BUGS 408 if (bcount) { 409 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); 410 idefloppy_write_zeros(drive, bcount); 411 } 412#endif 413} 414 415static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) 416{ 417 struct request *rq = pc->rq; 418 struct bio *bio = rq->bio; 419 420 while ((bio = rq->bio) != NULL) 421 idefloppy_do_end_request(drive, 1, 0); 422} 423 424/* 425 * idefloppy_queue_pc_head generates a new packet command request in front 426 * of the request queue, before the current request, so that it will be 427 * processed immediately, on the next pass through the driver. 428 */ 429static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) 430{ 431 struct ide_floppy_obj *floppy = drive->driver_data; 432 433 ide_init_drive_cmd(rq); 434 rq->buffer = (char *) pc; 435 rq->cmd_type = REQ_TYPE_SPECIAL; 436 rq->rq_disk = floppy->disk; 437 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 438} 439 440static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) 441{ 442 idefloppy_floppy_t *floppy = drive->driver_data; 443 444 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 445 floppy->pc_stack_index=0; 446 return (&floppy->pc_stack[floppy->pc_stack_index++]); 447} 448 449static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) 450{ 451 idefloppy_floppy_t *floppy = drive->driver_data; 452 453 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 454 floppy->rq_stack_index = 0; 455 return (&floppy->rq_stack[floppy->rq_stack_index++]); 456} 457 458static void idefloppy_request_sense_callback(ide_drive_t *drive) 459{ 460 idefloppy_floppy_t *floppy = drive->driver_data; 461 u8 *buf = floppy->pc->buffer; 462 463 debug_log("Reached %s\n", __func__); 464 465 if (!floppy->pc->error) { 466 floppy->sense_key = buf[2] & 0x0F; 467 floppy->asc = buf[12]; 468 floppy->ascq = buf[13]; 469 floppy->progress_indication = buf[15] & 0x80 ? 470 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 471 472 if (floppy->failed_pc) 473 debug_log("pc = %x, sense key = %x, asc = %x," 474 " ascq = %x\n", 475 floppy->failed_pc->c[0], 476 floppy->sense_key, 477 floppy->asc, 478 floppy->ascq); 479 else 480 debug_log("sense key = %x, asc = %x, ascq = %x\n", 481 floppy->sense_key, 482 floppy->asc, 483 floppy->ascq); 484 485 486 idefloppy_do_end_request(drive, 1, 0); 487 } else { 488 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting" 489 " request!\n"); 490 idefloppy_do_end_request(drive, 0, 0); 491 } 492} 493 494/* 495 * General packet command callback function. 496 */ 497static void idefloppy_pc_callback (ide_drive_t *drive) 498{ 499 idefloppy_floppy_t *floppy = drive->driver_data; 500 501 debug_log("Reached %s\n", __func__); 502 503 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); 504} 505 506/* 507 * idefloppy_init_pc initializes a packet command. 508 */ 509static void idefloppy_init_pc (idefloppy_pc_t *pc) 510{ 511 memset(pc->c, 0, 12); 512 pc->retries = 0; 513 pc->flags = 0; 514 pc->request_transfer = 0; 515 pc->buffer = pc->pc_buffer; 516 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; 517 pc->callback = &idefloppy_pc_callback; 518} 519 520static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) 521{ 522 idefloppy_init_pc(pc); 523 pc->c[0] = GPCMD_REQUEST_SENSE; 524 pc->c[4] = 255; 525 pc->request_transfer = 18; 526 pc->callback = &idefloppy_request_sense_callback; 527} 528 529/* 530 * idefloppy_retry_pc is called when an error was detected during the 531 * last packet command. We queue a request sense packet command in 532 * the head of the request list. 533 */ 534static void idefloppy_retry_pc (ide_drive_t *drive) 535{ 536 idefloppy_pc_t *pc; 537 struct request *rq; 538 539 (void)drive->hwif->INB(IDE_ERROR_REG); 540 pc = idefloppy_next_pc_storage(drive); 541 rq = idefloppy_next_rq_storage(drive); 542 idefloppy_create_request_sense_cmd(pc); 543 idefloppy_queue_pc_head(drive, pc, rq); 544} 545 546/* 547 * idefloppy_pc_intr is the usual interrupt handler which will be called 548 * during a packet command. 549 */ 550static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) 551{ 552 idefloppy_floppy_t *floppy = drive->driver_data; 553 ide_hwif_t *hwif = drive->hwif; 554 idefloppy_pc_t *pc = floppy->pc; 555 struct request *rq = pc->rq; 556 unsigned int temp; 557 u16 bcount; 558 u8 stat, ireason; 559 560 debug_log("Reached %s interrupt handler\n", __func__); 561 562 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 563 if (HWIF(drive)->ide_dma_end(drive)) { 564 set_bit(PC_DMA_ERROR, &pc->flags); 565 } else { 566 pc->actually_transferred = pc->request_transfer; 567 idefloppy_update_buffers(drive, pc); 568 } 569 debug_log("DMA finished\n"); 570 } 571 572 /* Clear the interrupt */ 573 stat = drive->hwif->INB(IDE_STATUS_REG); 574 575 if ((stat & DRQ_STAT) == 0) { /* No more interrupts */ 576 debug_log("Packet command completed, %d bytes transferred\n", 577 pc->actually_transferred); 578 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); 579 580 local_irq_enable_in_hardirq(); 581 582 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) { 583 /* Error detected */ 584 debug_log("%s: I/O error\n", drive->name); 585 rq->errors++; 586 if (pc->c[0] == GPCMD_REQUEST_SENSE) { 587 printk(KERN_ERR "ide-floppy: I/O error in " 588 "request sense command\n"); 589 return ide_do_reset(drive); 590 } 591 /* Retry operation */ 592 idefloppy_retry_pc(drive); 593 /* queued, but not started */ 594 return ide_stopped; 595 } 596 pc->error = 0; 597 if (floppy->failed_pc == pc) 598 floppy->failed_pc = NULL; 599 /* Command finished - Call the callback function */ 600 pc->callback(drive); 601 return ide_stopped; 602 } 603 604 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 605 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 606 "more interrupts in DMA mode\n"); 607 ide_dma_off(drive); 608 return ide_do_reset(drive); 609 } 610 611 /* Get the number of bytes to transfer */ 612 bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) | 613 hwif->INB(IDE_BCOUNTL_REG); 614 /* on this interrupt */ 615 ireason = hwif->INB(IDE_IREASON_REG); 616 617 if (ireason & CD) { 618 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); 619 return ide_do_reset(drive); 620 } 621 if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) { 622 /* Hopefully, we will never get here */ 623 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 624 (ireason & IO) ? "Write" : "Read"); 625 printk(KERN_ERR "but the floppy wants us to %s !\n", 626 (ireason & IO) ? "Read" : "Write"); 627 return ide_do_reset(drive); 628 } 629 if (!test_bit(PC_WRITING, &pc->flags)) { 630 /* Reading - Check that we have enough space */ 631 temp = pc->actually_transferred + bcount; 632 if (temp > pc->request_transfer) { 633 if (temp > pc->buffer_size) { 634 printk(KERN_ERR "ide-floppy: The floppy wants " 635 "to send us more data than expected " 636 "- discarding data\n"); 637 idefloppy_discard_data(drive, bcount); 638 639 ide_set_handler(drive, 640 &idefloppy_pc_intr, 641 IDEFLOPPY_WAIT_CMD, 642 NULL); 643 return ide_started; 644 } 645 debug_log("The floppy wants to send us more data than" 646 " expected - allowing transfer\n"); 647 } 648 } 649 if (test_bit(PC_WRITING, &pc->flags)) { 650 if (pc->buffer != NULL) 651 /* Write the current buffer */ 652 hwif->atapi_output_bytes(drive, pc->current_position, 653 bcount); 654 else 655 idefloppy_output_buffers(drive, pc, bcount); 656 } else { 657 if (pc->buffer != NULL) 658 /* Read the current buffer */ 659 hwif->atapi_input_bytes(drive, pc->current_position, 660 bcount); 661 else 662 idefloppy_input_buffers(drive, pc, bcount); 663 } 664 /* Update the current position */ 665 pc->actually_transferred += bcount; 666 pc->current_position += bcount; 667 668 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ 669 return ide_started; 670} 671 672/* 673 * This is the original routine that did the packet transfer. 674 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 675 * for that drive below. The algorithm is chosen based on drive type 676 */ 677static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) 678{ 679 ide_startstop_t startstop; 680 idefloppy_floppy_t *floppy = drive->driver_data; 681 u8 ireason; 682 683 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 684 printk(KERN_ERR "ide-floppy: Strange, packet command " 685 "initiated yet DRQ isn't asserted\n"); 686 return startstop; 687 } 688 ireason = drive->hwif->INB(IDE_IREASON_REG); 689 if ((ireason & CD) == 0 || (ireason & IO)) { 690 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 691 "issuing a packet command\n"); 692 return ide_do_reset(drive); 693 } 694 695 /* Set the interrupt routine */ 696 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 697 /* Send the actual packet */ 698 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 699 return ide_started; 700} 701 702 703/* 704 * What we have here is a classic case of a top half / bottom half 705 * interrupt service routine. In interrupt mode, the device sends 706 * an interrupt to signal it's ready to receive a packet. However, 707 * we need to delay about 2-3 ticks before issuing the packet or we 708 * gets in trouble. 709 * 710 * So, follow carefully. transfer_pc1 is called as an interrupt (or 711 * directly). In either case, when the device says it's ready for a 712 * packet, we schedule the packet transfer to occur about 2-3 ticks 713 * later in transfer_pc2. 714 */ 715static int idefloppy_transfer_pc2 (ide_drive_t *drive) 716{ 717 idefloppy_floppy_t *floppy = drive->driver_data; 718 719 /* Send the actual packet */ 720 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 721 /* Timeout for the packet command */ 722 return IDEFLOPPY_WAIT_CMD; 723} 724 725static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) 726{ 727 idefloppy_floppy_t *floppy = drive->driver_data; 728 ide_startstop_t startstop; 729 u8 ireason; 730 731 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 732 printk(KERN_ERR "ide-floppy: Strange, packet command " 733 "initiated yet DRQ isn't asserted\n"); 734 return startstop; 735 } 736 ireason = drive->hwif->INB(IDE_IREASON_REG); 737 if ((ireason & CD) == 0 || (ireason & IO)) { 738 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 739 "while issuing a packet command\n"); 740 return ide_do_reset(drive); 741 } 742 /* 743 * The following delay solves a problem with ATAPI Zip 100 drives 744 * where the Busy flag was apparently being deasserted before the 745 * unit was ready to receive data. This was happening on a 746 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 747 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 748 * used until after the packet is moved in about 50 msec. 749 */ 750 751 ide_set_handler(drive, 752 &idefloppy_pc_intr, /* service routine for packet command */ 753 floppy->ticks, /* wait this long before "failing" */ 754 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ 755 return ide_started; 756} 757 758/** 759 * idefloppy_should_report_error() 760 * 761 * Supresses error messages resulting from Medium not present 762 */ 763static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy) 764{ 765 if (floppy->sense_key == 0x02 && 766 floppy->asc == 0x3a && 767 floppy->ascq == 0x00) 768 return 0; 769 return 1; 770} 771 772/* 773 * Issue a packet command 774 */ 775static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) 776{ 777 idefloppy_floppy_t *floppy = drive->driver_data; 778 ide_hwif_t *hwif = drive->hwif; 779 ide_handler_t *pkt_xfer_routine; 780 u16 bcount; 781 u8 dma; 782 783 if (floppy->failed_pc == NULL && 784 pc->c[0] != GPCMD_REQUEST_SENSE) 785 floppy->failed_pc = pc; 786 /* Set the current packet command */ 787 floppy->pc = pc; 788 789 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || 790 test_bit(PC_ABORT, &pc->flags)) { 791 /* 792 * We will "abort" retrying a packet command in case 793 * a legitimate error code was received. 794 */ 795 if (!test_bit(PC_ABORT, &pc->flags)) { 796 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) { 797 if (idefloppy_should_report_error(floppy)) 798 printk(KERN_ERR "ide-floppy: %s: I/O error, " 799 "pc = %2x, key = %2x, " 800 "asc = %2x, ascq = %2x\n", 801 drive->name, pc->c[0], 802 floppy->sense_key, 803 floppy->asc, floppy->ascq); 804 } 805 /* Giving up */ 806 pc->error = IDEFLOPPY_ERROR_GENERAL; 807 } 808 floppy->failed_pc = NULL; 809 pc->callback(drive); 810 return ide_stopped; 811 } 812 813 debug_log("Retry number - %d\n", pc->retries); 814 815 pc->retries++; 816 /* We haven't transferred any data yet */ 817 pc->actually_transferred = 0; 818 pc->current_position = pc->buffer; 819 bcount = min(pc->request_transfer, 63 * 1024); 820 821 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) 822 ide_dma_off(drive); 823 824 dma = 0; 825 826 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) 827 dma = !hwif->dma_setup(drive); 828 829 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK | 830 IDE_TFLAG_OUT_DEVICE, bcount, dma); 831 832 if (dma) { /* Begin DMA, if necessary */ 833 set_bit(PC_DMA_IN_PROGRESS, &pc->flags); 834 hwif->dma_start(drive); 835 } 836 837 /* Can we transfer the packet when we get the interrupt or wait? */ 838 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { 839 /* wait */ 840 pkt_xfer_routine = &idefloppy_transfer_pc1; 841 } else { 842 /* immediate */ 843 pkt_xfer_routine = &idefloppy_transfer_pc; 844 } 845 846 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { 847 /* Issue the packet command */ 848 ide_execute_command(drive, WIN_PACKETCMD, 849 pkt_xfer_routine, 850 IDEFLOPPY_WAIT_CMD, 851 NULL); 852 return ide_started; 853 } else { 854 /* Issue the packet command */ 855 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); 856 return (*pkt_xfer_routine) (drive); 857 } 858} 859 860static void idefloppy_rw_callback (ide_drive_t *drive) 861{ 862 debug_log("Reached %s\n", __func__); 863 864 idefloppy_do_end_request(drive, 1, 0); 865 return; 866} 867 868static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) 869{ 870 debug_log("creating prevent removal command, prevent = %d\n", prevent); 871 872 idefloppy_init_pc(pc); 873 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; 874 pc->c[4] = prevent; 875} 876 877static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) 878{ 879 idefloppy_init_pc(pc); 880 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 881 pc->c[7] = 255; 882 pc->c[8] = 255; 883 pc->request_transfer = 255; 884} 885 886static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, 887 int flags) 888{ 889 idefloppy_init_pc(pc); 890 pc->c[0] = GPCMD_FORMAT_UNIT; 891 pc->c[1] = 0x17; 892 893 memset(pc->buffer, 0, 12); 894 pc->buffer[1] = 0xA2; 895 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 896 897 if (flags & 1) /* Verify bit on... */ 898 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ 899 pc->buffer[3] = 8; 900 901 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4])); 902 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8])); 903 pc->buffer_size=12; 904 set_bit(PC_WRITING, &pc->flags); 905} 906 907/* 908 * A mode sense command is used to "sense" floppy parameters. 909 */ 910static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) 911{ 912 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 913 914 idefloppy_init_pc(pc); 915 pc->c[0] = GPCMD_MODE_SENSE_10; 916 pc->c[1] = 0; 917 pc->c[2] = page_code + (type << 6); 918 919 switch (page_code) { 920 case IDEFLOPPY_CAPABILITIES_PAGE: 921 length += 12; 922 break; 923 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 924 length += 32; 925 break; 926 default: 927 printk(KERN_ERR "ide-floppy: unsupported page code " 928 "in create_mode_sense_cmd\n"); 929 } 930 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 931 pc->request_transfer = length; 932} 933 934static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) 935{ 936 idefloppy_init_pc(pc); 937 pc->c[0] = GPCMD_START_STOP_UNIT; 938 pc->c[4] = start; 939} 940 941static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) 942{ 943 idefloppy_init_pc(pc); 944 pc->c[0] = GPCMD_TEST_UNIT_READY; 945} 946 947static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) 948{ 949 int block = sector / floppy->bs_factor; 950 int blocks = rq->nr_sectors / floppy->bs_factor; 951 int cmd = rq_data_dir(rq); 952 953 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", 954 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), 955 block, blocks); 956 957 idefloppy_init_pc(pc); 958 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { 959 pc->c[0] = cmd == READ ? GPCMD_READ_12 : GPCMD_WRITE_12; 960 put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]); 961 } else { 962 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 963 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 964 } 965 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 966 pc->callback = &idefloppy_rw_callback; 967 pc->rq = rq; 968 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 969 if (rq->cmd_flags & REQ_RW) 970 set_bit(PC_WRITING, &pc->flags); 971 pc->buffer = NULL; 972 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; 973 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 974} 975 976static void 977idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) 978{ 979 idefloppy_init_pc(pc); 980 pc->callback = &idefloppy_rw_callback; 981 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 982 pc->rq = rq; 983 pc->b_count = rq->data_len; 984 if (rq->data_len && rq_data_dir(rq) == WRITE) 985 set_bit(PC_WRITING, &pc->flags); 986 pc->buffer = rq->data; 987 if (rq->bio) 988 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 989 990 /* 991 * possibly problematic, doesn't look like ide-floppy correctly 992 * handled scattered requests if dma fails... 993 */ 994 pc->request_transfer = pc->buffer_size = rq->data_len; 995} 996 997/* 998 * idefloppy_do_request is our request handling function. 999 */ 1000static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) 1001{ 1002 idefloppy_floppy_t *floppy = drive->driver_data; 1003 idefloppy_pc_t *pc; 1004 unsigned long block = (unsigned long)block_s; 1005 1006 debug_log("dev: %s, cmd_type: %x, errors: %d\n", 1007 rq->rq_disk ? rq->rq_disk->disk_name : "?", 1008 rq->cmd_type, rq->errors); 1009 debug_log("sector: %ld, nr_sectors: %ld, " 1010 "current_nr_sectors: %d\n", (long)rq->sector, 1011 rq->nr_sectors, rq->current_nr_sectors); 1012 1013 if (rq->errors >= ERROR_MAX) { 1014 if (floppy->failed_pc != NULL) { 1015 if (idefloppy_should_report_error(floppy)) 1016 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x," 1017 " key = %2x, asc = %2x, ascq = %2x\n", 1018 drive->name, floppy->failed_pc->c[0], 1019 floppy->sense_key, floppy->asc, floppy->ascq); 1020 } 1021 else 1022 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 1023 drive->name); 1024 idefloppy_do_end_request(drive, 0, 0); 1025 return ide_stopped; 1026 } 1027 if (blk_fs_request(rq)) { 1028 if (((long)rq->sector % floppy->bs_factor) || 1029 (rq->nr_sectors % floppy->bs_factor)) { 1030 printk("%s: unsupported r/w request size\n", 1031 drive->name); 1032 idefloppy_do_end_request(drive, 0, 0); 1033 return ide_stopped; 1034 } 1035 pc = idefloppy_next_pc_storage(drive); 1036 idefloppy_create_rw_cmd(floppy, pc, rq, block); 1037 } else if (blk_special_request(rq)) { 1038 pc = (idefloppy_pc_t *) rq->buffer; 1039 } else if (blk_pc_request(rq)) { 1040 pc = idefloppy_next_pc_storage(drive); 1041 idefloppy_blockpc_cmd(floppy, pc, rq); 1042 } else { 1043 blk_dump_rq_flags(rq, 1044 "ide-floppy: unsupported command in queue"); 1045 idefloppy_do_end_request(drive, 0, 0); 1046 return ide_stopped; 1047 } 1048 1049 pc->rq = rq; 1050 return idefloppy_issue_pc(drive, pc); 1051} 1052 1053/* 1054 * idefloppy_queue_pc_tail adds a special packet command request to the 1055 * tail of the request queue, and waits for it to be serviced. 1056 */ 1057static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) 1058{ 1059 struct ide_floppy_obj *floppy = drive->driver_data; 1060 struct request rq; 1061 1062 ide_init_drive_cmd (&rq); 1063 rq.buffer = (char *) pc; 1064 rq.cmd_type = REQ_TYPE_SPECIAL; 1065 rq.rq_disk = floppy->disk; 1066 1067 return ide_do_drive_cmd(drive, &rq, ide_wait); 1068} 1069 1070/* 1071 * Look at the flexible disk page parameters. We ignore the CHS capacity 1072 * parameters and use the LBA parameters instead. 1073 */ 1074static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 1075{ 1076 idefloppy_floppy_t *floppy = drive->driver_data; 1077 idefloppy_pc_t pc; 1078 u8 *page; 1079 int capacity, lba_capacity; 1080 u16 transfer_rate, sector_size, cyls, rpm; 1081 u8 heads, sectors; 1082 1083 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, 1084 MODE_SENSE_CURRENT); 1085 1086 if (idefloppy_queue_pc_tail(drive, &pc)) { 1087 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 1088 " parameters\n"); 1089 return 1; 1090 } 1091 floppy->wp = !!(pc.buffer[3] & 0x80); 1092 set_disk_ro(floppy->disk, floppy->wp); 1093 page = &pc.buffer[8]; 1094 1095 transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]); 1096 sector_size = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]); 1097 cyls = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]); 1098 rpm = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]); 1099 heads = pc.buffer[8 + 4]; 1100 sectors = pc.buffer[8 + 5]; 1101 1102 capacity = cyls * heads * sectors * sector_size; 1103 1104 if (memcmp(page, &floppy->flexible_disk_page, 32)) 1105 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 1106 "%d sector size, %d rpm\n", 1107 drive->name, capacity / 1024, cyls, heads, 1108 sectors, transfer_rate / 8, sector_size, rpm); 1109 1110 memcpy(&floppy->flexible_disk_page, page, 32); 1111 drive->bios_cyl = cyls; 1112 drive->bios_head = heads; 1113 drive->bios_sect = sectors; 1114 lba_capacity = floppy->blocks * floppy->block_size; 1115 1116 if (capacity < lba_capacity) { 1117 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 1118 "bytes, but the drive only handles %d\n", 1119 drive->name, lba_capacity, capacity); 1120 floppy->blocks = floppy->block_size ? 1121 capacity / floppy->block_size : 0; 1122 } 1123 return 0; 1124} 1125 1126static int idefloppy_get_sfrp_bit(ide_drive_t *drive) 1127{ 1128 idefloppy_floppy_t *floppy = drive->driver_data; 1129 idefloppy_pc_t pc; 1130 1131 floppy->srfp = 0; 1132 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 1133 MODE_SENSE_CURRENT); 1134 1135 set_bit(PC_SUPPRESS_ERROR, &pc.flags); 1136 if (idefloppy_queue_pc_tail(drive, &pc)) 1137 return 1; 1138 1139 floppy->srfp = pc.buffer[8 + 2] & 0x40; 1140 return (0); 1141} 1142 1143/* 1144 * Determine if a media is present in the floppy drive, and if so, 1145 * its LBA capacity. 1146 */ 1147static int idefloppy_get_capacity (ide_drive_t *drive) 1148{ 1149 idefloppy_floppy_t *floppy = drive->driver_data; 1150 idefloppy_pc_t pc; 1151 idefloppy_capacity_header_t *header; 1152 idefloppy_capacity_descriptor_t *descriptor; 1153 int i, descriptors, rc = 1, blocks, length; 1154 1155 drive->bios_cyl = 0; 1156 drive->bios_head = drive->bios_sect = 0; 1157 floppy->blocks = 0; 1158 floppy->bs_factor = 1; 1159 set_capacity(floppy->disk, 0); 1160 1161 idefloppy_create_read_capacity_cmd(&pc); 1162 if (idefloppy_queue_pc_tail(drive, &pc)) { 1163 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1164 return 1; 1165 } 1166 header = (idefloppy_capacity_header_t *) pc.buffer; 1167 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); 1168 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1169 1170 for (i = 0; i < descriptors; i++, descriptor++) { 1171 blocks = descriptor->blocks = be32_to_cpu(descriptor->blocks); 1172 length = descriptor->length = be16_to_cpu(descriptor->length); 1173 1174 if (!i) 1175 { 1176 switch (descriptor->dc) { 1177 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1178 case CAPACITY_UNFORMATTED: 1179 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) 1180 /* 1181 * If it is not a clik drive, break out 1182 * (maintains previous driver behaviour) 1183 */ 1184 break; 1185 case CAPACITY_CURRENT: 1186 /* Normal Zip/LS-120 disks */ 1187 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) 1188 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1189 "sector size\n", drive->name, 1190 blocks * length / 1024, blocks, length); 1191 floppy->capacity = *descriptor; 1192 if (!length || length % 512) { 1193 printk(KERN_NOTICE "%s: %d bytes block size " 1194 "not supported\n", drive->name, length); 1195 } else { 1196 floppy->blocks = blocks; 1197 floppy->block_size = length; 1198 if ((floppy->bs_factor = length / 512) != 1) 1199 printk(KERN_NOTICE "%s: warning: non " 1200 "512 bytes block size not " 1201 "fully supported\n", 1202 drive->name); 1203 rc = 0; 1204 } 1205 break; 1206 case CAPACITY_NO_CARTRIDGE: 1207 /* 1208 * This is a KERN_ERR so it appears on screen 1209 * for the user to see 1210 */ 1211 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1212 break; 1213 case CAPACITY_INVALID: 1214 printk(KERN_ERR "%s: Invalid capacity for disk " 1215 "in drive\n", drive->name); 1216 break; 1217 } 1218 } 1219 if (!i) { 1220 debug_log("Descriptor 0 Code: %d\n", descriptor->dc); 1221 } 1222 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 1223 i, blocks * length / 1024, blocks, length); 1224 } 1225 1226 /* Clik! disk does not support get_flexible_disk_page */ 1227 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1228 (void) ide_floppy_get_flexible_disk_page(drive); 1229 } 1230 1231 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1232 return rc; 1233} 1234 1235/* 1236** Obtain the list of formattable capacities. 1237** Very similar to idefloppy_get_capacity, except that we push the capacity 1238** descriptors to userland, instead of our own structures. 1239** 1240** Userland gives us the following structure: 1241** 1242** struct idefloppy_format_capacities { 1243** int nformats; 1244** struct { 1245** int nblocks; 1246** int blocksize; 1247** } formats[]; 1248** } ; 1249** 1250** userland initializes nformats to the number of allocated formats[] 1251** records. On exit we set nformats to the number of records we've 1252** actually initialized. 1253** 1254*/ 1255 1256static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1257{ 1258 idefloppy_pc_t pc; 1259 idefloppy_capacity_header_t *header; 1260 idefloppy_capacity_descriptor_t *descriptor; 1261 int i, descriptors, blocks, length; 1262 int u_array_size; 1263 int u_index; 1264 int __user *argp; 1265 1266 if (get_user(u_array_size, arg)) 1267 return (-EFAULT); 1268 1269 if (u_array_size <= 0) 1270 return (-EINVAL); 1271 1272 idefloppy_create_read_capacity_cmd(&pc); 1273 if (idefloppy_queue_pc_tail(drive, &pc)) { 1274 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1275 return (-EIO); 1276 } 1277 header = (idefloppy_capacity_header_t *) pc.buffer; 1278 descriptors = header->length / 1279 sizeof(idefloppy_capacity_descriptor_t); 1280 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1281 1282 u_index = 0; 1283 argp = arg + 1; 1284 1285 /* 1286 ** We always skip the first capacity descriptor. That's the 1287 ** current capacity. We are interested in the remaining descriptors, 1288 ** the formattable capacities. 1289 */ 1290 1291 for (i=0; i<descriptors; i++, descriptor++) { 1292 if (u_index >= u_array_size) 1293 break; /* User-supplied buffer too small */ 1294 if (i == 0) 1295 continue; /* Skip the first descriptor */ 1296 1297 blocks = be32_to_cpu(descriptor->blocks); 1298 length = be16_to_cpu(descriptor->length); 1299 1300 if (put_user(blocks, argp)) 1301 return(-EFAULT); 1302 ++argp; 1303 1304 if (put_user(length, argp)) 1305 return (-EFAULT); 1306 ++argp; 1307 1308 ++u_index; 1309 } 1310 1311 if (put_user(u_index, arg)) 1312 return (-EFAULT); 1313 return (0); 1314} 1315 1316/* 1317** Send ATAPI_FORMAT_UNIT to the drive. 1318** 1319** Userland gives us the following structure: 1320** 1321** struct idefloppy_format_command { 1322** int nblocks; 1323** int blocksize; 1324** int flags; 1325** } ; 1326** 1327** flags is a bitmask, currently, the only defined flag is: 1328** 1329** 0x01 - verify media after format. 1330*/ 1331 1332static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg) 1333{ 1334 int blocks; 1335 int length; 1336 int flags; 1337 idefloppy_pc_t pc; 1338 1339 if (get_user(blocks, arg) || 1340 get_user(length, arg+1) || 1341 get_user(flags, arg+2)) { 1342 return (-EFAULT); 1343 } 1344 1345 (void) idefloppy_get_sfrp_bit(drive); 1346 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1347 if (idefloppy_queue_pc_tail(drive, &pc)) { 1348 return (-EIO); 1349 } 1350 1351 return (0); 1352} 1353 1354/* 1355** Get ATAPI_FORMAT_UNIT progress indication. 1356** 1357** Userland gives a pointer to an int. The int is set to a progress 1358** indicator 0-65536, with 65536=100%. 1359** 1360** If the drive does not support format progress indication, we just check 1361** the dsc bit, and return either 0 or 65536. 1362*/ 1363 1364static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1365{ 1366 idefloppy_floppy_t *floppy = drive->driver_data; 1367 idefloppy_pc_t pc; 1368 int progress_indication = 0x10000; 1369 1370 if (floppy->srfp) { 1371 idefloppy_create_request_sense_cmd(&pc); 1372 if (idefloppy_queue_pc_tail(drive, &pc)) { 1373 return (-EIO); 1374 } 1375 1376 if (floppy->sense_key == 2 && 1377 floppy->asc == 4 && 1378 floppy->ascq == 4) { 1379 progress_indication = floppy->progress_indication; 1380 } 1381 /* Else assume format_unit has finished, and we're 1382 ** at 0x10000 */ 1383 } else { 1384 unsigned long flags; 1385 u8 stat; 1386 1387 local_irq_save(flags); 1388 stat = drive->hwif->INB(IDE_STATUS_REG); 1389 local_irq_restore(flags); 1390 1391 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; 1392 } 1393 if (put_user(progress_indication, arg)) 1394 return (-EFAULT); 1395 1396 return (0); 1397} 1398 1399/* 1400 * Return the current floppy capacity. 1401 */ 1402static sector_t idefloppy_capacity (ide_drive_t *drive) 1403{ 1404 idefloppy_floppy_t *floppy = drive->driver_data; 1405 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1406 1407 return capacity; 1408} 1409 1410/* 1411 * idefloppy_identify_device checks if we can support a drive, 1412 * based on the ATAPI IDENTIFY command results. 1413 */ 1414static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) 1415{ 1416 struct idefloppy_id_gcw gcw; 1417#if IDEFLOPPY_DEBUG_INFO 1418 char buffer[80]; 1419#endif /* IDEFLOPPY_DEBUG_INFO */ 1420 1421 *((u16 *) &gcw) = id->config; 1422 1423#ifdef CONFIG_PPC 1424 /* kludge for Apple PowerBook internal zip */ 1425 if ((gcw.device_type == 5) && 1426 !strstr(id->model, "CD-ROM") && 1427 strstr(id->model, "ZIP")) 1428 gcw.device_type = 0; 1429#endif 1430 1431#if IDEFLOPPY_DEBUG_INFO 1432 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); 1433 switch (gcw.protocol) { 1434 case 0: case 1: sprintf(buffer, "ATA");break; 1435 case 2: sprintf(buffer, "ATAPI");break; 1436 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; 1437 } 1438 printk(KERN_INFO "Protocol Type: %s\n", buffer); 1439 switch (gcw.device_type) { 1440 case 0: sprintf(buffer, "Direct-access Device");break; 1441 case 1: sprintf(buffer, "Streaming Tape Device");break; 1442 case 2: case 3: case 4: sprintf (buffer, "Reserved");break; 1443 case 5: sprintf(buffer, "CD-ROM Device");break; 1444 case 6: sprintf(buffer, "Reserved"); 1445 case 7: sprintf(buffer, "Optical memory Device");break; 1446 case 0x1f: sprintf(buffer, "Unknown or no Device type");break; 1447 default: sprintf(buffer, "Reserved"); 1448 } 1449 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); 1450 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 1451 switch (gcw.drq_type) { 1452 case 0: sprintf(buffer, "Microprocessor DRQ");break; 1453 case 1: sprintf(buffer, "Interrupt DRQ");break; 1454 case 2: sprintf(buffer, "Accelerated DRQ");break; 1455 case 3: sprintf(buffer, "Reserved");break; 1456 } 1457 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); 1458 switch (gcw.packet_size) { 1459 case 0: sprintf(buffer, "12 bytes");break; 1460 case 1: sprintf(buffer, "16 bytes");break; 1461 default: sprintf(buffer, "Reserved");break; 1462 } 1463 printk(KERN_INFO "Command Packet Size: %s\n", buffer); 1464#endif /* IDEFLOPPY_DEBUG_INFO */ 1465 1466 if (gcw.protocol != 2) 1467 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); 1468 else if (gcw.device_type != 0) 1469 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); 1470 else if (!gcw.removable) 1471 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1472 else if (gcw.drq_type == 3) { 1473 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); 1474 } else if (gcw.packet_size != 0) { 1475 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); 1476 } else 1477 return 1; 1478 return 0; 1479} 1480 1481#ifdef CONFIG_IDE_PROC_FS 1482static void idefloppy_add_settings(ide_drive_t *drive) 1483{ 1484 idefloppy_floppy_t *floppy = drive->driver_data; 1485 1486/* 1487 * drive setting name read/write data type min max mul_factor div_factor data pointer set function 1488 */ 1489 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); 1490 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); 1491 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); 1492 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); 1493} 1494#else 1495static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1496#endif 1497 1498/* 1499 * Driver initialization. 1500 */ 1501static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) 1502{ 1503 struct idefloppy_id_gcw gcw; 1504 1505 *((u16 *) &gcw) = drive->id->config; 1506 floppy->pc = floppy->pc_stack; 1507 if (gcw.drq_type == 1) 1508 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); 1509 /* 1510 * We used to check revisions here. At this point however 1511 * I'm giving up. Just assume they are all broken, its easier. 1512 * 1513 * The actual reason for the workarounds was likely 1514 * a driver bug after all rather than a firmware bug, 1515 * and the workaround below used to hide it. It should 1516 * be fixed as of version 1.9, but to be on the safe side 1517 * we'll leave the limitation below for the 2.2.x tree. 1518 */ 1519 1520 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1521 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); 1522 /* This value will be visible in the /proc/ide/hdx/settings */ 1523 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1524 blk_queue_max_sectors(drive->queue, 64); 1525 } 1526 1527 /* 1528 * Guess what? The IOMEGA Clik! drive also needs the 1529 * above fix. It makes nasty clicking noises without 1530 * it, so please don't remove this. 1531 */ 1532 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1533 blk_queue_max_sectors(drive->queue, 64); 1534 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); 1535 } 1536 1537 1538 (void) idefloppy_get_capacity(drive); 1539 idefloppy_add_settings(drive); 1540} 1541 1542static void ide_floppy_remove(ide_drive_t *drive) 1543{ 1544 idefloppy_floppy_t *floppy = drive->driver_data; 1545 struct gendisk *g = floppy->disk; 1546 1547 ide_proc_unregister_driver(drive, floppy->driver); 1548 1549 del_gendisk(g); 1550 1551 ide_floppy_put(floppy); 1552} 1553 1554static void idefloppy_cleanup_obj(struct kref *kref) 1555{ 1556 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1557 ide_drive_t *drive = floppy->drive; 1558 struct gendisk *g = floppy->disk; 1559 1560 drive->driver_data = NULL; 1561 g->private_data = NULL; 1562 put_disk(g); 1563 kfree(floppy); 1564} 1565 1566#ifdef CONFIG_IDE_PROC_FS 1567static int proc_idefloppy_read_capacity 1568 (char *page, char **start, off_t off, int count, int *eof, void *data) 1569{ 1570 ide_drive_t*drive = (ide_drive_t *)data; 1571 int len; 1572 1573 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); 1574 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 1575} 1576 1577static ide_proc_entry_t idefloppy_proc[] = { 1578 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1579 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1580 { NULL, 0, NULL, NULL } 1581}; 1582#endif /* CONFIG_IDE_PROC_FS */ 1583 1584static int ide_floppy_probe(ide_drive_t *); 1585 1586static ide_driver_t idefloppy_driver = { 1587 .gen_driver = { 1588 .owner = THIS_MODULE, 1589 .name = "ide-floppy", 1590 .bus = &ide_bus_type, 1591 }, 1592 .probe = ide_floppy_probe, 1593 .remove = ide_floppy_remove, 1594 .version = IDEFLOPPY_VERSION, 1595 .media = ide_floppy, 1596 .supports_dsc_overlap = 0, 1597 .do_request = idefloppy_do_request, 1598 .end_request = idefloppy_do_end_request, 1599 .error = __ide_error, 1600 .abort = __ide_abort, 1601#ifdef CONFIG_IDE_PROC_FS 1602 .proc = idefloppy_proc, 1603#endif 1604}; 1605 1606static int idefloppy_open(struct inode *inode, struct file *filp) 1607{ 1608 struct gendisk *disk = inode->i_bdev->bd_disk; 1609 struct ide_floppy_obj *floppy; 1610 ide_drive_t *drive; 1611 idefloppy_pc_t pc; 1612 int ret = 0; 1613 1614 debug_log("Reached %s\n", __func__); 1615 1616 if (!(floppy = ide_floppy_get(disk))) 1617 return -ENXIO; 1618 1619 drive = floppy->drive; 1620 1621 floppy->openers++; 1622 1623 if (floppy->openers == 1) { 1624 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1625 /* Just in case */ 1626 1627 idefloppy_create_test_unit_ready_cmd(&pc); 1628 if (idefloppy_queue_pc_tail(drive, &pc)) { 1629 idefloppy_create_start_stop_cmd(&pc, 1); 1630 (void) idefloppy_queue_pc_tail(drive, &pc); 1631 } 1632 1633 if (idefloppy_get_capacity (drive) 1634 && (filp->f_flags & O_NDELAY) == 0 1635 /* 1636 ** Allow O_NDELAY to open a drive without a disk, or with 1637 ** an unreadable disk, so that we can get the format 1638 ** capacity of the drive or begin the format - Sam 1639 */ 1640 ) { 1641 ret = -EIO; 1642 goto out_put_floppy; 1643 } 1644 1645 if (floppy->wp && (filp->f_mode & 2)) { 1646 ret = -EROFS; 1647 goto out_put_floppy; 1648 } 1649 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1650 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1651 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1652 idefloppy_create_prevent_cmd(&pc, 1); 1653 (void) idefloppy_queue_pc_tail(drive, &pc); 1654 } 1655 check_disk_change(inode->i_bdev); 1656 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { 1657 ret = -EBUSY; 1658 goto out_put_floppy; 1659 } 1660 return 0; 1661 1662out_put_floppy: 1663 floppy->openers--; 1664 ide_floppy_put(floppy); 1665 return ret; 1666} 1667 1668static int idefloppy_release(struct inode *inode, struct file *filp) 1669{ 1670 struct gendisk *disk = inode->i_bdev->bd_disk; 1671 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1672 ide_drive_t *drive = floppy->drive; 1673 idefloppy_pc_t pc; 1674 1675 debug_log("Reached %s\n", __func__); 1676 1677 if (floppy->openers == 1) { 1678 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1679 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1680 idefloppy_create_prevent_cmd(&pc, 0); 1681 (void) idefloppy_queue_pc_tail(drive, &pc); 1682 } 1683 1684 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1685 } 1686 1687 floppy->openers--; 1688 1689 ide_floppy_put(floppy); 1690 1691 return 0; 1692} 1693 1694static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1695{ 1696 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1697 ide_drive_t *drive = floppy->drive; 1698 1699 geo->heads = drive->bios_head; 1700 geo->sectors = drive->bios_sect; 1701 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1702 return 0; 1703} 1704 1705static int idefloppy_ioctl(struct inode *inode, struct file *file, 1706 unsigned int cmd, unsigned long arg) 1707{ 1708 struct block_device *bdev = inode->i_bdev; 1709 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1710 ide_drive_t *drive = floppy->drive; 1711 void __user *argp = (void __user *)arg; 1712 int err; 1713 int prevent = (arg) ? 1 : 0; 1714 idefloppy_pc_t pc; 1715 1716 switch (cmd) { 1717 case CDROMEJECT: 1718 prevent = 0; 1719 /* fall through */ 1720 case CDROM_LOCKDOOR: 1721 if (floppy->openers > 1) 1722 return -EBUSY; 1723 1724 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */ 1725 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1726 idefloppy_create_prevent_cmd(&pc, prevent); 1727 (void) idefloppy_queue_pc_tail(drive, &pc); 1728 } 1729 if (cmd == CDROMEJECT) { 1730 idefloppy_create_start_stop_cmd(&pc, 2); 1731 (void) idefloppy_queue_pc_tail(drive, &pc); 1732 } 1733 return 0; 1734 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1735 return 0; 1736 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1737 return idefloppy_get_format_capacities(drive, argp); 1738 case IDEFLOPPY_IOCTL_FORMAT_START: 1739 1740 if (!(file->f_mode & 2)) 1741 return -EPERM; 1742 1743 if (floppy->openers > 1) { 1744 /* Don't format if someone is using the disk */ 1745 1746 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, 1747 &floppy->flags); 1748 return -EBUSY; 1749 } 1750 1751 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1752 1753 err = idefloppy_begin_format(drive, argp); 1754 if (err) 1755 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1756 return err; 1757 /* 1758 ** Note, the bit will be cleared when the device is 1759 ** closed. This is the cleanest way to handle the 1760 ** situation where the drive does not support 1761 ** format progress reporting. 1762 */ 1763 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1764 return idefloppy_get_format_progress(drive, argp); 1765 } 1766 1767 /* 1768 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 1769 * and CDROM_SEND_PACKET (legacy) ioctls 1770 */ 1771 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 1772 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 1773 bdev->bd_disk, cmd, argp); 1774 else 1775 err = -ENOTTY; 1776 1777 if (err == -ENOTTY) 1778 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 1779 1780 return err; 1781} 1782 1783static int idefloppy_media_changed(struct gendisk *disk) 1784{ 1785 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1786 ide_drive_t *drive = floppy->drive; 1787 1788 /* do not scan partitions twice if this is a removable device */ 1789 if (drive->attach) { 1790 drive->attach = 0; 1791 return 0; 1792 } 1793 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1794} 1795 1796static int idefloppy_revalidate_disk(struct gendisk *disk) 1797{ 1798 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1799 set_capacity(disk, idefloppy_capacity(floppy->drive)); 1800 return 0; 1801} 1802 1803static struct block_device_operations idefloppy_ops = { 1804 .owner = THIS_MODULE, 1805 .open = idefloppy_open, 1806 .release = idefloppy_release, 1807 .ioctl = idefloppy_ioctl, 1808 .getgeo = idefloppy_getgeo, 1809 .media_changed = idefloppy_media_changed, 1810 .revalidate_disk= idefloppy_revalidate_disk 1811}; 1812 1813static int ide_floppy_probe(ide_drive_t *drive) 1814{ 1815 idefloppy_floppy_t *floppy; 1816 struct gendisk *g; 1817 1818 if (!strstr("ide-floppy", drive->driver_req)) 1819 goto failed; 1820 if (!drive->present) 1821 goto failed; 1822 if (drive->media != ide_floppy) 1823 goto failed; 1824 if (!idefloppy_identify_device (drive, drive->id)) { 1825 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); 1826 goto failed; 1827 } 1828 if (drive->scsi) { 1829 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); 1830 goto failed; 1831 } 1832 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { 1833 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); 1834 goto failed; 1835 } 1836 1837 g = alloc_disk(1 << PARTN_BITS); 1838 if (!g) 1839 goto out_free_floppy; 1840 1841 ide_init_disk(g, drive); 1842 1843 ide_proc_register_driver(drive, &idefloppy_driver); 1844 1845 kref_init(&floppy->kref); 1846 1847 floppy->drive = drive; 1848 floppy->driver = &idefloppy_driver; 1849 floppy->disk = g; 1850 1851 g->private_data = &floppy->driver; 1852 1853 drive->driver_data = floppy; 1854 1855 idefloppy_setup (drive, floppy); 1856 1857 g->minors = 1 << PARTN_BITS; 1858 g->driverfs_dev = &drive->gendev; 1859 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 1860 g->fops = &idefloppy_ops; 1861 drive->attach = 1; 1862 add_disk(g); 1863 return 0; 1864 1865out_free_floppy: 1866 kfree(floppy); 1867failed: 1868 return -ENODEV; 1869} 1870 1871MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1872 1873static void __exit idefloppy_exit (void) 1874{ 1875 driver_unregister(&idefloppy_driver.gen_driver); 1876} 1877 1878static int __init idefloppy_init(void) 1879{ 1880 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 1881 return driver_register(&idefloppy_driver.gen_driver); 1882} 1883 1884MODULE_ALIAS("ide:*m-floppy*"); 1885module_init(idefloppy_init); 1886module_exit(idefloppy_exit); 1887MODULE_LICENSE("GPL"); 1888