1/* 2 * linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002 3 * 4 * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il> 5 * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net> 6 */ 7 8 9#define IDEFLOPPY_VERSION "0.99.newide" 10 11#include <linux/module.h> 12#include <linux/types.h> 13#include <linux/string.h> 14#include <linux/kernel.h> 15#include <linux/delay.h> 16#include <linux/timer.h> 17#include <linux/mm.h> 18#include <linux/interrupt.h> 19#include <linux/major.h> 20#include <linux/errno.h> 21#include <linux/genhd.h> 22#include <linux/slab.h> 23#include <linux/cdrom.h> 24#include <linux/ide.h> 25#include <linux/bitops.h> 26#include <linux/mutex.h> 27 28#include <asm/byteorder.h> 29#include <asm/irq.h> 30#include <asm/uaccess.h> 31#include <asm/io.h> 32#include <asm/unaligned.h> 33 34/* 35 * The following are used to debug the driver. 36 */ 37#define IDEFLOPPY_DEBUG_LOG 0 38#define IDEFLOPPY_DEBUG_INFO 0 39#define IDEFLOPPY_DEBUG_BUGS 1 40 41/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 42#define IDEFLOPPY_DEBUG( fmt, args... ) 43 44#if IDEFLOPPY_DEBUG_LOG 45#define debug_log printk 46#else 47#define debug_log(fmt, args... ) do {} while(0) 48#endif 49 50 51/* 52 * Some drives require a longer irq timeout. 53 */ 54#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 55 56/* 57 * After each failed packet command we issue a request sense command 58 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. 59 */ 60#define IDEFLOPPY_MAX_PC_RETRIES 3 61 62/* 63 * With each packet command, we allocate a buffer of 64 * IDEFLOPPY_PC_BUFFER_SIZE bytes. 65 */ 66#define IDEFLOPPY_PC_BUFFER_SIZE 256 67 68/* 69 * In various places in the driver, we need to allocate storage 70 * for packet commands and requests, which will remain valid while 71 * we leave the driver to wait for an interrupt or a timeout event. 72 */ 73#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 74 75/* 76 * Our view of a packet command. 77 */ 78typedef struct idefloppy_packet_command_s { 79 u8 c[12]; /* Actual packet bytes */ 80 int retries; /* On each retry, we increment retries */ 81 int error; /* Error code */ 82 int request_transfer; /* Bytes to transfer */ 83 int actually_transferred; /* Bytes actually transferred */ 84 int buffer_size; /* Size of our data buffer */ 85 int b_count; /* Missing/Available data on the current buffer */ 86 struct request *rq; /* The corresponding request */ 87 u8 *buffer; /* Data buffer */ 88 u8 *current_position; /* Pointer into the above buffer */ 89 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ 90 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ 91 unsigned long flags; /* Status/Action bit flags: long for set_bit */ 92} idefloppy_pc_t; 93 94/* 95 * Packet command flag bits. 96 */ 97#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ 98#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ 99#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ 100#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ 101#define PC_WRITING 5 /* Data direction */ 102 103#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ 104 105/* 106 * Removable Block Access Capabilities Page 107 */ 108typedef struct { 109#if defined(__LITTLE_ENDIAN_BITFIELD) 110 unsigned page_code :6; /* Page code - Should be 0x1b */ 111 unsigned reserved1_6 :1; /* Reserved */ 112 unsigned ps :1; /* Should be 0 */ 113#elif defined(__BIG_ENDIAN_BITFIELD) 114 unsigned ps :1; /* Should be 0 */ 115 unsigned reserved1_6 :1; /* Reserved */ 116 unsigned page_code :6; /* Page code - Should be 0x1b */ 117#else 118#error "Bitfield endianness not defined! Check your byteorder.h" 119#endif 120 u8 page_length; /* Page Length - Should be 0xa */ 121#if defined(__LITTLE_ENDIAN_BITFIELD) 122 unsigned reserved2 :6; 123 unsigned srfp :1; /* Supports reporting progress of format */ 124 unsigned sflp :1; /* System floppy type device */ 125 unsigned tlun :3; /* Total logical units supported by the device */ 126 unsigned reserved3 :3; 127 unsigned sml :1; /* Single / Multiple lun supported */ 128 unsigned ncd :1; /* Non cd optical device */ 129#elif defined(__BIG_ENDIAN_BITFIELD) 130 unsigned sflp :1; /* System floppy type device */ 131 unsigned srfp :1; /* Supports reporting progress of format */ 132 unsigned reserved2 :6; 133 unsigned ncd :1; /* Non cd optical device */ 134 unsigned sml :1; /* Single / Multiple lun supported */ 135 unsigned reserved3 :3; 136 unsigned tlun :3; /* Total logical units supported by the device */ 137#else 138#error "Bitfield endianness not defined! Check your byteorder.h" 139#endif 140 u8 reserved[8]; 141} idefloppy_capabilities_page_t; 142 143/* 144 * Flexible disk page. 145 */ 146typedef struct { 147#if defined(__LITTLE_ENDIAN_BITFIELD) 148 unsigned page_code :6; /* Page code - Should be 0x5 */ 149 unsigned reserved1_6 :1; /* Reserved */ 150 unsigned ps :1; /* The device is capable of saving the page */ 151#elif defined(__BIG_ENDIAN_BITFIELD) 152 unsigned ps :1; /* The device is capable of saving the page */ 153 unsigned reserved1_6 :1; /* Reserved */ 154 unsigned page_code :6; /* Page code - Should be 0x5 */ 155#else 156#error "Bitfield endianness not defined! Check your byteorder.h" 157#endif 158 u8 page_length; /* Page Length - Should be 0x1e */ 159 u16 transfer_rate; /* In kilobits per second */ 160 u8 heads, sectors; /* Number of heads, Number of sectors per track */ 161 u16 sector_size; /* Byes per sector */ 162 u16 cyls; /* Number of cylinders */ 163 u8 reserved10[10]; 164 u8 motor_delay; /* Motor off delay */ 165 u8 reserved21[7]; 166 u16 rpm; /* Rotations per minute */ 167 u8 reserved30[2]; 168} idefloppy_flexible_disk_page_t; 169 170/* 171 * Format capacity 172 */ 173typedef struct { 174 u8 reserved[3]; 175 u8 length; /* Length of the following descriptors in bytes */ 176} idefloppy_capacity_header_t; 177 178typedef struct { 179 u32 blocks; /* Number of blocks */ 180#if defined(__LITTLE_ENDIAN_BITFIELD) 181 unsigned dc :2; /* Descriptor Code */ 182 unsigned reserved :6; 183#elif defined(__BIG_ENDIAN_BITFIELD) 184 unsigned reserved :6; 185 unsigned dc :2; /* Descriptor Code */ 186#else 187#error "Bitfield endianness not defined! Check your byteorder.h" 188#endif 189 u8 length_msb; /* Block Length (MSB)*/ 190 u16 length; /* Block Length */ 191} idefloppy_capacity_descriptor_t; 192 193#define CAPACITY_INVALID 0x00 194#define CAPACITY_UNFORMATTED 0x01 195#define CAPACITY_CURRENT 0x02 196#define CAPACITY_NO_CARTRIDGE 0x03 197 198/* 199 * Most of our global data which we need to save even as we leave the 200 * driver due to an interrupt or a timer event is stored in a variable 201 * of type idefloppy_floppy_t, defined below. 202 */ 203typedef struct ide_floppy_obj { 204 ide_drive_t *drive; 205 ide_driver_t *driver; 206 struct gendisk *disk; 207 struct kref kref; 208 unsigned int openers; /* protected by BKL for now */ 209 210 /* Current packet command */ 211 idefloppy_pc_t *pc; 212 /* Last failed packet command */ 213 idefloppy_pc_t *failed_pc; 214 /* Packet command stack */ 215 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; 216 /* Next free packet command storage space */ 217 int pc_stack_index; 218 struct request rq_stack[IDEFLOPPY_PC_STACK]; 219 /* We implement a circular array */ 220 int rq_stack_index; 221 222 /* 223 * Last error information 224 */ 225 u8 sense_key, asc, ascq; 226 /* delay this long before sending packet command */ 227 u8 ticks; 228 int progress_indication; 229 230 /* 231 * Device information 232 */ 233 /* Current format */ 234 int blocks, block_size, bs_factor; 235 /* Last format capacity */ 236 idefloppy_capacity_descriptor_t capacity; 237 /* Copy of the flexible disk page */ 238 idefloppy_flexible_disk_page_t flexible_disk_page; 239 /* Write protect */ 240 int wp; 241 /* Supports format progress report */ 242 int srfp; 243 /* Status/Action flags */ 244 unsigned long flags; 245} idefloppy_floppy_t; 246 247#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 248 249/* 250 * Floppy flag bits values. 251 */ 252#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ 253#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ 254#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ 255#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ 256#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ 257#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ 258 259/* 260 * ATAPI floppy drive packet commands 261 */ 262#define IDEFLOPPY_FORMAT_UNIT_CMD 0x04 263#define IDEFLOPPY_INQUIRY_CMD 0x12 264#define IDEFLOPPY_MODE_SELECT_CMD 0x55 265#define IDEFLOPPY_MODE_SENSE_CMD 0x5a 266#define IDEFLOPPY_READ10_CMD 0x28 267#define IDEFLOPPY_READ12_CMD 0xa8 268#define IDEFLOPPY_READ_CAPACITY_CMD 0x23 269#define IDEFLOPPY_REQUEST_SENSE_CMD 0x03 270#define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e 271#define IDEFLOPPY_SEEK_CMD 0x2b 272#define IDEFLOPPY_START_STOP_CMD 0x1b 273#define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00 274#define IDEFLOPPY_VERIFY_CMD 0x2f 275#define IDEFLOPPY_WRITE10_CMD 0x2a 276#define IDEFLOPPY_WRITE12_CMD 0xaa 277#define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e 278 279/* 280 * Defines for the mode sense command 281 */ 282#define MODE_SENSE_CURRENT 0x00 283#define MODE_SENSE_CHANGEABLE 0x01 284#define MODE_SENSE_DEFAULT 0x02 285#define MODE_SENSE_SAVED 0x03 286 287/* 288 * IOCTLs used in low-level formatting. 289 */ 290 291#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 292#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 293#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 294#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 295 296 297/* 298 * Error codes which are returned in rq->errors to the higher part 299 * of the driver. 300 */ 301#define IDEFLOPPY_ERROR_GENERAL 101 302 303/* 304 * The following is used to format the general configuration word of 305 * the ATAPI IDENTIFY DEVICE command. 306 */ 307struct idefloppy_id_gcw { 308#if defined(__LITTLE_ENDIAN_BITFIELD) 309 unsigned packet_size :2; /* Packet Size */ 310 unsigned reserved234 :3; /* Reserved */ 311 unsigned drq_type :2; /* Command packet DRQ type */ 312 unsigned removable :1; /* Removable media */ 313 unsigned device_type :5; /* Device type */ 314 unsigned reserved13 :1; /* Reserved */ 315 unsigned protocol :2; /* Protocol type */ 316#elif defined(__BIG_ENDIAN_BITFIELD) 317 unsigned protocol :2; /* Protocol type */ 318 unsigned reserved13 :1; /* Reserved */ 319 unsigned device_type :5; /* Device type */ 320 unsigned removable :1; /* Removable media */ 321 unsigned drq_type :2; /* Command packet DRQ type */ 322 unsigned reserved234 :3; /* Reserved */ 323 unsigned packet_size :2; /* Packet Size */ 324#else 325#error "Bitfield endianness not defined! Check your byteorder.h" 326#endif 327}; 328 329/* 330 * INQUIRY packet command - Data Format 331 */ 332typedef struct { 333#if defined(__LITTLE_ENDIAN_BITFIELD) 334 unsigned device_type :5; /* Peripheral Device Type */ 335 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 336 unsigned reserved1_6t0 :7; /* Reserved */ 337 unsigned rmb :1; /* Removable Medium Bit */ 338 unsigned ansi_version :3; /* ANSI Version */ 339 unsigned ecma_version :3; /* ECMA Version */ 340 unsigned iso_version :2; /* ISO Version */ 341 unsigned response_format :4; /* Response Data Format */ 342 unsigned reserved3_45 :2; /* Reserved */ 343 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 344 unsigned reserved3_7 :1; /* AENC - Reserved */ 345#elif defined(__BIG_ENDIAN_BITFIELD) 346 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 347 unsigned device_type :5; /* Peripheral Device Type */ 348 unsigned rmb :1; /* Removable Medium Bit */ 349 unsigned reserved1_6t0 :7; /* Reserved */ 350 unsigned iso_version :2; /* ISO Version */ 351 unsigned ecma_version :3; /* ECMA Version */ 352 unsigned ansi_version :3; /* ANSI Version */ 353 unsigned reserved3_7 :1; /* AENC - Reserved */ 354 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 355 unsigned reserved3_45 :2; /* Reserved */ 356 unsigned response_format :4; /* Response Data Format */ 357#else 358#error "Bitfield endianness not defined! Check your byteorder.h" 359#endif 360 u8 additional_length; /* Additional Length (total_length-4) */ 361 u8 rsv5, rsv6, rsv7; /* Reserved */ 362 u8 vendor_id[8]; /* Vendor Identification */ 363 u8 product_id[16]; /* Product Identification */ 364 u8 revision_level[4]; /* Revision Level */ 365 u8 vendor_specific[20]; /* Vendor Specific - Optional */ 366 u8 reserved56t95[40]; /* Reserved - Optional */ 367 /* Additional information may be returned */ 368} idefloppy_inquiry_result_t; 369 370/* 371 * REQUEST SENSE packet command result - Data Format. 372 */ 373typedef struct { 374#if defined(__LITTLE_ENDIAN_BITFIELD) 375 unsigned error_code :7; /* Current error (0x70) */ 376 unsigned valid :1; /* The information field conforms to SFF-8070i */ 377 u8 reserved1 :8; /* Reserved */ 378 unsigned sense_key :4; /* Sense Key */ 379 unsigned reserved2_4 :1; /* Reserved */ 380 unsigned ili :1; /* Incorrect Length Indicator */ 381 unsigned reserved2_67 :2; 382#elif defined(__BIG_ENDIAN_BITFIELD) 383 unsigned valid :1; /* The information field conforms to SFF-8070i */ 384 unsigned error_code :7; /* Current error (0x70) */ 385 u8 reserved1 :8; /* Reserved */ 386 unsigned reserved2_67 :2; 387 unsigned ili :1; /* Incorrect Length Indicator */ 388 unsigned reserved2_4 :1; /* Reserved */ 389 unsigned sense_key :4; /* Sense Key */ 390#else 391#error "Bitfield endianness not defined! Check your byteorder.h" 392#endif 393 u32 information __attribute__ ((packed)); 394 u8 asl; /* Additional sense length (n-7) */ 395 u32 command_specific; /* Additional command specific information */ 396 u8 asc; /* Additional Sense Code */ 397 u8 ascq; /* Additional Sense Code Qualifier */ 398 u8 replaceable_unit_code; /* Field Replaceable Unit Code */ 399 u8 sksv[3]; 400 u8 pad[2]; /* Padding to 20 bytes */ 401} idefloppy_request_sense_result_t; 402 403/* 404 * Pages of the SELECT SENSE / MODE SENSE packet commands. 405 */ 406#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 407#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 408 409/* 410 * Mode Parameter Header for the MODE SENSE packet command 411 */ 412typedef struct { 413 u16 mode_data_length; /* Length of the following data transfer */ 414 u8 medium_type; /* Medium Type */ 415#if defined(__LITTLE_ENDIAN_BITFIELD) 416 unsigned reserved3 :7; 417 unsigned wp :1; /* Write protect */ 418#elif defined(__BIG_ENDIAN_BITFIELD) 419 unsigned wp :1; /* Write protect */ 420 unsigned reserved3 :7; 421#else 422#error "Bitfield endianness not defined! Check your byteorder.h" 423#endif 424 u8 reserved[4]; 425} idefloppy_mode_parameter_header_t; 426 427static DEFINE_MUTEX(idefloppy_ref_mutex); 428 429#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 430 431#define ide_floppy_g(disk) \ 432 container_of((disk)->private_data, struct ide_floppy_obj, driver) 433 434static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 435{ 436 struct ide_floppy_obj *floppy = NULL; 437 438 mutex_lock(&idefloppy_ref_mutex); 439 floppy = ide_floppy_g(disk); 440 if (floppy) 441 kref_get(&floppy->kref); 442 mutex_unlock(&idefloppy_ref_mutex); 443 return floppy; 444} 445 446static void ide_floppy_release(struct kref *); 447 448static void ide_floppy_put(struct ide_floppy_obj *floppy) 449{ 450 mutex_lock(&idefloppy_ref_mutex); 451 kref_put(&floppy->kref, ide_floppy_release); 452 mutex_unlock(&idefloppy_ref_mutex); 453} 454 455/* 456 * Too bad. The drive wants to send us data which we are not ready to accept. 457 * Just throw it away. 458 */ 459static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) 460{ 461 while (bcount--) 462 (void) HWIF(drive)->INB(IDE_DATA_REG); 463} 464 465#if IDEFLOPPY_DEBUG_BUGS 466static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) 467{ 468 while (bcount--) 469 HWIF(drive)->OUTB(0, IDE_DATA_REG); 470} 471#endif /* IDEFLOPPY_DEBUG_BUGS */ 472 473 474/* 475 * idefloppy_do_end_request is used to finish servicing a request. 476 * 477 * For read/write requests, we will call ide_end_request to pass to the 478 * next buffer. 479 */ 480static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) 481{ 482 idefloppy_floppy_t *floppy = drive->driver_data; 483 struct request *rq = HWGROUP(drive)->rq; 484 int error; 485 486 debug_log(KERN_INFO "Reached idefloppy_end_request\n"); 487 488 switch (uptodate) { 489 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 490 case 1: error = 0; break; 491 default: error = uptodate; 492 } 493 if (error) 494 floppy->failed_pc = NULL; 495 /* Why does this happen? */ 496 if (!rq) 497 return 0; 498 if (!blk_special_request(rq)) { 499 /* our real local end request function */ 500 ide_end_request(drive, uptodate, nsecs); 501 return 0; 502 } 503 rq->errors = error; 504 ide_end_drive_cmd(drive, 0, 0); 505 return 0; 506} 507 508static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 509{ 510 struct request *rq = pc->rq; 511 struct bio_vec *bvec; 512 struct bio *bio; 513 unsigned long flags; 514 char *data; 515 int count, i, done = 0; 516 517 rq_for_each_bio(bio, rq) { 518 bio_for_each_segment(bvec, bio, i) { 519 if (!bcount) 520 break; 521 522 count = min(bvec->bv_len, bcount); 523 524 data = bvec_kmap_irq(bvec, &flags); 525 drive->hwif->atapi_input_bytes(drive, data, count); 526 bvec_kunmap_irq(data, &flags); 527 528 bcount -= count; 529 pc->b_count += count; 530 done += count; 531 } 532 } 533 534 idefloppy_do_end_request(drive, 1, done >> 9); 535 536 if (bcount) { 537 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); 538 idefloppy_discard_data(drive, bcount); 539 } 540} 541 542static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 543{ 544 struct request *rq = pc->rq; 545 struct bio *bio; 546 struct bio_vec *bvec; 547 unsigned long flags; 548 int count, i, done = 0; 549 char *data; 550 551 rq_for_each_bio(bio, rq) { 552 bio_for_each_segment(bvec, bio, i) { 553 if (!bcount) 554 break; 555 556 count = min(bvec->bv_len, bcount); 557 558 data = bvec_kmap_irq(bvec, &flags); 559 drive->hwif->atapi_output_bytes(drive, data, count); 560 bvec_kunmap_irq(data, &flags); 561 562 bcount -= count; 563 pc->b_count += count; 564 done += count; 565 } 566 } 567 568 idefloppy_do_end_request(drive, 1, done >> 9); 569 570#if IDEFLOPPY_DEBUG_BUGS 571 if (bcount) { 572 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); 573 idefloppy_write_zeros(drive, bcount); 574 } 575#endif 576} 577 578static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) 579{ 580 struct request *rq = pc->rq; 581 struct bio *bio = rq->bio; 582 583 while ((bio = rq->bio) != NULL) 584 idefloppy_do_end_request(drive, 1, 0); 585} 586 587/* 588 * idefloppy_queue_pc_head generates a new packet command request in front 589 * of the request queue, before the current request, so that it will be 590 * processed immediately, on the next pass through the driver. 591 */ 592static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) 593{ 594 struct ide_floppy_obj *floppy = drive->driver_data; 595 596 ide_init_drive_cmd(rq); 597 rq->buffer = (char *) pc; 598 rq->cmd_type = REQ_TYPE_SPECIAL; 599 rq->rq_disk = floppy->disk; 600 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 601} 602 603static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) 604{ 605 idefloppy_floppy_t *floppy = drive->driver_data; 606 607 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 608 floppy->pc_stack_index=0; 609 return (&floppy->pc_stack[floppy->pc_stack_index++]); 610} 611 612static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) 613{ 614 idefloppy_floppy_t *floppy = drive->driver_data; 615 616 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 617 floppy->rq_stack_index = 0; 618 return (&floppy->rq_stack[floppy->rq_stack_index++]); 619} 620 621/* 622 * idefloppy_analyze_error is called on each failed packet command retry 623 * to analyze the request sense. 624 */ 625static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result) 626{ 627 idefloppy_floppy_t *floppy = drive->driver_data; 628 629 floppy->sense_key = result->sense_key; 630 floppy->asc = result->asc; 631 floppy->ascq = result->ascq; 632 floppy->progress_indication = result->sksv[0] & 0x80 ? 633 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000; 634 if (floppy->failed_pc) 635 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, " 636 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0], 637 result->sense_key, result->asc, result->ascq); 638 else 639 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, " 640 "ascq = %x\n", result->sense_key, 641 result->asc, result->ascq); 642} 643 644static void idefloppy_request_sense_callback (ide_drive_t *drive) 645{ 646 idefloppy_floppy_t *floppy = drive->driver_data; 647 648 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 649 650 if (!floppy->pc->error) { 651 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer); 652 idefloppy_do_end_request(drive, 1, 0); 653 } else { 654 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n"); 655 idefloppy_do_end_request(drive, 0, 0); 656 } 657} 658 659/* 660 * General packet command callback function. 661 */ 662static void idefloppy_pc_callback (ide_drive_t *drive) 663{ 664 idefloppy_floppy_t *floppy = drive->driver_data; 665 666 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 667 668 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); 669} 670 671/* 672 * idefloppy_init_pc initializes a packet command. 673 */ 674static void idefloppy_init_pc (idefloppy_pc_t *pc) 675{ 676 memset(pc->c, 0, 12); 677 pc->retries = 0; 678 pc->flags = 0; 679 pc->request_transfer = 0; 680 pc->buffer = pc->pc_buffer; 681 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; 682 pc->callback = &idefloppy_pc_callback; 683} 684 685static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) 686{ 687 idefloppy_init_pc(pc); 688 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD; 689 pc->c[4] = 255; 690 pc->request_transfer = 18; 691 pc->callback = &idefloppy_request_sense_callback; 692} 693 694/* 695 * idefloppy_retry_pc is called when an error was detected during the 696 * last packet command. We queue a request sense packet command in 697 * the head of the request list. 698 */ 699static void idefloppy_retry_pc (ide_drive_t *drive) 700{ 701 idefloppy_pc_t *pc; 702 struct request *rq; 703 atapi_error_t error; 704 705 error.all = HWIF(drive)->INB(IDE_ERROR_REG); 706 pc = idefloppy_next_pc_storage(drive); 707 rq = idefloppy_next_rq_storage(drive); 708 idefloppy_create_request_sense_cmd(pc); 709 idefloppy_queue_pc_head(drive, pc, rq); 710} 711 712/* 713 * idefloppy_pc_intr is the usual interrupt handler which will be called 714 * during a packet command. 715 */ 716static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) 717{ 718 idefloppy_floppy_t *floppy = drive->driver_data; 719 atapi_status_t status; 720 atapi_bcount_t bcount; 721 atapi_ireason_t ireason; 722 idefloppy_pc_t *pc = floppy->pc; 723 struct request *rq = pc->rq; 724 unsigned int temp; 725 726 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n", 727 __FUNCTION__); 728 729 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 730 if (HWIF(drive)->ide_dma_end(drive)) { 731 set_bit(PC_DMA_ERROR, &pc->flags); 732 } else { 733 pc->actually_transferred = pc->request_transfer; 734 idefloppy_update_buffers(drive, pc); 735 } 736 debug_log(KERN_INFO "ide-floppy: DMA finished\n"); 737 } 738 739 /* Clear the interrupt */ 740 status.all = HWIF(drive)->INB(IDE_STATUS_REG); 741 742 if (!status.b.drq) { /* No more interrupts */ 743 debug_log(KERN_INFO "Packet command completed, %d bytes " 744 "transferred\n", pc->actually_transferred); 745 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); 746 747 local_irq_enable_in_hardirq(); 748 749 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) { 750 /* Error detected */ 751 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n", 752 drive->name); 753 rq->errors++; 754 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 755 printk(KERN_ERR "ide-floppy: I/O error in " 756 "request sense command\n"); 757 return ide_do_reset(drive); 758 } 759 /* Retry operation */ 760 idefloppy_retry_pc(drive); 761 /* queued, but not started */ 762 return ide_stopped; 763 } 764 pc->error = 0; 765 if (floppy->failed_pc == pc) 766 floppy->failed_pc = NULL; 767 /* Command finished - Call the callback function */ 768 pc->callback(drive); 769 return ide_stopped; 770 } 771 772 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 773 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 774 "more interrupts in DMA mode\n"); 775 ide_dma_off(drive); 776 return ide_do_reset(drive); 777 } 778 779 /* Get the number of bytes to transfer */ 780 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG); 781 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG); 782 /* on this interrupt */ 783 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 784 785 if (ireason.b.cod) { 786 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); 787 return ide_do_reset(drive); 788 } 789 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) { 790 /* Hopefully, we will never get here */ 791 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 792 ireason.b.io ? "Write":"Read"); 793 printk(KERN_ERR "but the floppy wants us to %s !\n", 794 ireason.b.io ? "Read":"Write"); 795 return ide_do_reset(drive); 796 } 797 if (!test_bit(PC_WRITING, &pc->flags)) { 798 /* Reading - Check that we have enough space */ 799 temp = pc->actually_transferred + bcount.all; 800 if (temp > pc->request_transfer) { 801 if (temp > pc->buffer_size) { 802 printk(KERN_ERR "ide-floppy: The floppy wants " 803 "to send us more data than expected " 804 "- discarding data\n"); 805 idefloppy_discard_data(drive,bcount.all); 806 BUG_ON(HWGROUP(drive)->handler != NULL); 807 ide_set_handler(drive, 808 &idefloppy_pc_intr, 809 IDEFLOPPY_WAIT_CMD, 810 NULL); 811 return ide_started; 812 } 813 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to " 814 "send us more data than expected - " 815 "allowing transfer\n"); 816 } 817 } 818 if (test_bit(PC_WRITING, &pc->flags)) { 819 if (pc->buffer != NULL) 820 /* Write the current buffer */ 821 HWIF(drive)->atapi_output_bytes(drive, 822 pc->current_position, 823 bcount.all); 824 else 825 idefloppy_output_buffers(drive, pc, bcount.all); 826 } else { 827 if (pc->buffer != NULL) 828 /* Read the current buffer */ 829 HWIF(drive)->atapi_input_bytes(drive, 830 pc->current_position, 831 bcount.all); 832 else 833 idefloppy_input_buffers(drive, pc, bcount.all); 834 } 835 /* Update the current position */ 836 pc->actually_transferred += bcount.all; 837 pc->current_position += bcount.all; 838 839 BUG_ON(HWGROUP(drive)->handler != NULL); 840 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ 841 return ide_started; 842} 843 844/* 845 * This is the original routine that did the packet transfer. 846 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 847 * for that drive below. The algorithm is chosen based on drive type 848 */ 849static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) 850{ 851 ide_startstop_t startstop; 852 idefloppy_floppy_t *floppy = drive->driver_data; 853 atapi_ireason_t ireason; 854 855 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 856 printk(KERN_ERR "ide-floppy: Strange, packet command " 857 "initiated yet DRQ isn't asserted\n"); 858 return startstop; 859 } 860 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 861 if (!ireason.b.cod || ireason.b.io) { 862 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 863 "issuing a packet command\n"); 864 return ide_do_reset(drive); 865 } 866 BUG_ON(HWGROUP(drive)->handler != NULL); 867 /* Set the interrupt routine */ 868 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 869 /* Send the actual packet */ 870 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 871 return ide_started; 872} 873 874 875/* 876 * What we have here is a classic case of a top half / bottom half 877 * interrupt service routine. In interrupt mode, the device sends 878 * an interrupt to signal it's ready to receive a packet. However, 879 * we need to delay about 2-3 ticks before issuing the packet or we 880 * gets in trouble. 881 * 882 * So, follow carefully. transfer_pc1 is called as an interrupt (or 883 * directly). In either case, when the device says it's ready for a 884 * packet, we schedule the packet transfer to occur about 2-3 ticks 885 * later in transfer_pc2. 886 */ 887static int idefloppy_transfer_pc2 (ide_drive_t *drive) 888{ 889 idefloppy_floppy_t *floppy = drive->driver_data; 890 891 /* Send the actual packet */ 892 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 893 /* Timeout for the packet command */ 894 return IDEFLOPPY_WAIT_CMD; 895} 896 897static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) 898{ 899 idefloppy_floppy_t *floppy = drive->driver_data; 900 ide_startstop_t startstop; 901 atapi_ireason_t ireason; 902 903 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 904 printk(KERN_ERR "ide-floppy: Strange, packet command " 905 "initiated yet DRQ isn't asserted\n"); 906 return startstop; 907 } 908 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 909 if (!ireason.b.cod || ireason.b.io) { 910 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 911 "while issuing a packet command\n"); 912 return ide_do_reset(drive); 913 } 914 /* 915 * The following delay solves a problem with ATAPI Zip 100 drives 916 * where the Busy flag was apparently being deasserted before the 917 * unit was ready to receive data. This was happening on a 918 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 919 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 920 * used until after the packet is moved in about 50 msec. 921 */ 922 BUG_ON(HWGROUP(drive)->handler != NULL); 923 ide_set_handler(drive, 924 &idefloppy_pc_intr, /* service routine for packet command */ 925 floppy->ticks, /* wait this long before "failing" */ 926 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ 927 return ide_started; 928} 929 930/** 931 * idefloppy_should_report_error() 932 * 933 * Supresses error messages resulting from Medium not present 934 */ 935static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy) 936{ 937 if (floppy->sense_key == 0x02 && 938 floppy->asc == 0x3a && 939 floppy->ascq == 0x00) 940 return 0; 941 return 1; 942} 943 944/* 945 * Issue a packet command 946 */ 947static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) 948{ 949 idefloppy_floppy_t *floppy = drive->driver_data; 950 ide_hwif_t *hwif = drive->hwif; 951 atapi_feature_t feature; 952 atapi_bcount_t bcount; 953 ide_handler_t *pkt_xfer_routine; 954 955#if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone 956 and have lived on another thread's stack; that stack may have become 957 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */ 958#if IDEFLOPPY_DEBUG_BUGS 959 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD && 960 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 961 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - " 962 "Two request sense in serial were issued\n"); 963 } 964#endif /* IDEFLOPPY_DEBUG_BUGS */ 965#endif 966 967 if (floppy->failed_pc == NULL && 968 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) 969 floppy->failed_pc = pc; 970 /* Set the current packet command */ 971 floppy->pc = pc; 972 973 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || 974 test_bit(PC_ABORT, &pc->flags)) { 975 /* 976 * We will "abort" retrying a packet command in case 977 * a legitimate error code was received. 978 */ 979 if (!test_bit(PC_ABORT, &pc->flags)) { 980 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) { 981 if (idefloppy_should_report_error(floppy)) 982 printk(KERN_ERR "ide-floppy: %s: I/O error, " 983 "pc = %2x, key = %2x, " 984 "asc = %2x, ascq = %2x\n", 985 drive->name, pc->c[0], 986 floppy->sense_key, 987 floppy->asc, floppy->ascq); 988 } 989 /* Giving up */ 990 pc->error = IDEFLOPPY_ERROR_GENERAL; 991 } 992 floppy->failed_pc = NULL; 993 pc->callback(drive); 994 return ide_stopped; 995 } 996 997 debug_log(KERN_INFO "Retry number - %d\n",pc->retries); 998 999 pc->retries++; 1000 /* We haven't transferred any data yet */ 1001 pc->actually_transferred = 0; 1002 pc->current_position = pc->buffer; 1003 bcount.all = min(pc->request_transfer, 63 * 1024); 1004 1005 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) 1006 ide_dma_off(drive); 1007 1008 feature.all = 0; 1009 1010 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) 1011 feature.b.dma = !hwif->dma_setup(drive); 1012 1013 if (IDE_CONTROL_REG) 1014 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); 1015 /* Use PIO/DMA */ 1016 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG); 1017 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG); 1018 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG); 1019 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG); 1020 1021 if (feature.b.dma) { /* Begin DMA, if necessary */ 1022 set_bit(PC_DMA_IN_PROGRESS, &pc->flags); 1023 hwif->dma_start(drive); 1024 } 1025 1026 /* Can we transfer the packet when we get the interrupt or wait? */ 1027 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { 1028 /* wait */ 1029 pkt_xfer_routine = &idefloppy_transfer_pc1; 1030 } else { 1031 /* immediate */ 1032 pkt_xfer_routine = &idefloppy_transfer_pc; 1033 } 1034 1035 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { 1036 /* Issue the packet command */ 1037 ide_execute_command(drive, WIN_PACKETCMD, 1038 pkt_xfer_routine, 1039 IDEFLOPPY_WAIT_CMD, 1040 NULL); 1041 return ide_started; 1042 } else { 1043 /* Issue the packet command */ 1044 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); 1045 return (*pkt_xfer_routine) (drive); 1046 } 1047} 1048 1049static void idefloppy_rw_callback (ide_drive_t *drive) 1050{ 1051 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n"); 1052 1053 idefloppy_do_end_request(drive, 1, 0); 1054 return; 1055} 1056 1057static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) 1058{ 1059 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, " 1060 "prevent = %d\n", prevent); 1061 1062 idefloppy_init_pc(pc); 1063 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD; 1064 pc->c[4] = prevent; 1065} 1066 1067static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) 1068{ 1069 idefloppy_init_pc(pc); 1070 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD; 1071 pc->c[7] = 255; 1072 pc->c[8] = 255; 1073 pc->request_transfer = 255; 1074} 1075 1076static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, 1077 int flags) 1078{ 1079 idefloppy_init_pc(pc); 1080 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD; 1081 pc->c[1] = 0x17; 1082 1083 memset(pc->buffer, 0, 12); 1084 pc->buffer[1] = 0xA2; 1085 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 1086 1087 if (flags & 1) /* Verify bit on... */ 1088 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ 1089 pc->buffer[3] = 8; 1090 1091 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4])); 1092 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8])); 1093 pc->buffer_size=12; 1094 set_bit(PC_WRITING, &pc->flags); 1095} 1096 1097/* 1098 * A mode sense command is used to "sense" floppy parameters. 1099 */ 1100static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) 1101{ 1102 u16 length = sizeof(idefloppy_mode_parameter_header_t); 1103 1104 idefloppy_init_pc(pc); 1105 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD; 1106 pc->c[1] = 0; 1107 pc->c[2] = page_code + (type << 6); 1108 1109 switch (page_code) { 1110 case IDEFLOPPY_CAPABILITIES_PAGE: 1111 length += 12; 1112 break; 1113 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 1114 length += 32; 1115 break; 1116 default: 1117 printk(KERN_ERR "ide-floppy: unsupported page code " 1118 "in create_mode_sense_cmd\n"); 1119 } 1120 put_unaligned(htons(length), (u16 *) &pc->c[7]); 1121 pc->request_transfer = length; 1122} 1123 1124static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) 1125{ 1126 idefloppy_init_pc(pc); 1127 pc->c[0] = IDEFLOPPY_START_STOP_CMD; 1128 pc->c[4] = start; 1129} 1130 1131static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) 1132{ 1133 idefloppy_init_pc(pc); 1134 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD; 1135} 1136 1137static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) 1138{ 1139 int block = sector / floppy->bs_factor; 1140 int blocks = rq->nr_sectors / floppy->bs_factor; 1141 int cmd = rq_data_dir(rq); 1142 1143 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", 1144 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), 1145 block, blocks); 1146 1147 idefloppy_init_pc(pc); 1148 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { 1149 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD; 1150 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]); 1151 } else { 1152 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD; 1153 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]); 1154 } 1155 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]); 1156 pc->callback = &idefloppy_rw_callback; 1157 pc->rq = rq; 1158 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 1159 if (rq->cmd_flags & REQ_RW) 1160 set_bit(PC_WRITING, &pc->flags); 1161 pc->buffer = NULL; 1162 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; 1163 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 1164} 1165 1166static int 1167idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) 1168{ 1169 /* 1170 * just support eject for now, it would not be hard to make the 1171 * REQ_BLOCK_PC support fully-featured 1172 */ 1173 if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD) 1174 return 1; 1175 1176 idefloppy_init_pc(pc); 1177 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 1178 return 0; 1179} 1180 1181/* 1182 * idefloppy_do_request is our request handling function. 1183 */ 1184static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) 1185{ 1186 idefloppy_floppy_t *floppy = drive->driver_data; 1187 idefloppy_pc_t *pc; 1188 unsigned long block = (unsigned long)block_s; 1189 1190 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n", 1191 rq->rq_disk ? rq->rq_disk->disk_name : "?", 1192 rq->flags, rq->errors); 1193 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, " 1194 "current_nr_sectors: %d\n", (long)rq->sector, 1195 rq->nr_sectors, rq->current_nr_sectors); 1196 1197 if (rq->errors >= ERROR_MAX) { 1198 if (floppy->failed_pc != NULL) { 1199 if (idefloppy_should_report_error(floppy)) 1200 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x," 1201 " key = %2x, asc = %2x, ascq = %2x\n", 1202 drive->name, floppy->failed_pc->c[0], 1203 floppy->sense_key, floppy->asc, floppy->ascq); 1204 } 1205 else 1206 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 1207 drive->name); 1208 idefloppy_do_end_request(drive, 0, 0); 1209 return ide_stopped; 1210 } 1211 if (blk_fs_request(rq)) { 1212 if (((long)rq->sector % floppy->bs_factor) || 1213 (rq->nr_sectors % floppy->bs_factor)) { 1214 printk("%s: unsupported r/w request size\n", 1215 drive->name); 1216 idefloppy_do_end_request(drive, 0, 0); 1217 return ide_stopped; 1218 } 1219 pc = idefloppy_next_pc_storage(drive); 1220 idefloppy_create_rw_cmd(floppy, pc, rq, block); 1221 } else if (blk_special_request(rq)) { 1222 pc = (idefloppy_pc_t *) rq->buffer; 1223 } else if (blk_pc_request(rq)) { 1224 pc = idefloppy_next_pc_storage(drive); 1225 if (idefloppy_blockpc_cmd(floppy, pc, rq)) { 1226 idefloppy_do_end_request(drive, 0, 0); 1227 return ide_stopped; 1228 } 1229 } else { 1230 blk_dump_rq_flags(rq, 1231 "ide-floppy: unsupported command in queue"); 1232 idefloppy_do_end_request(drive, 0, 0); 1233 return ide_stopped; 1234 } 1235 1236 pc->rq = rq; 1237 return idefloppy_issue_pc(drive, pc); 1238} 1239 1240/* 1241 * idefloppy_queue_pc_tail adds a special packet command request to the 1242 * tail of the request queue, and waits for it to be serviced. 1243 */ 1244static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) 1245{ 1246 struct ide_floppy_obj *floppy = drive->driver_data; 1247 struct request rq; 1248 1249 ide_init_drive_cmd (&rq); 1250 rq.buffer = (char *) pc; 1251 rq.cmd_type = REQ_TYPE_SPECIAL; 1252 rq.rq_disk = floppy->disk; 1253 1254 return ide_do_drive_cmd(drive, &rq, ide_wait); 1255} 1256 1257/* 1258 * Look at the flexible disk page parameters. We will ignore the CHS 1259 * capacity parameters and use the LBA parameters instead. 1260 */ 1261static int idefloppy_get_flexible_disk_page (ide_drive_t *drive) 1262{ 1263 idefloppy_floppy_t *floppy = drive->driver_data; 1264 idefloppy_pc_t pc; 1265 idefloppy_mode_parameter_header_t *header; 1266 idefloppy_flexible_disk_page_t *page; 1267 int capacity, lba_capacity; 1268 1269 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT); 1270 if (idefloppy_queue_pc_tail(drive,&pc)) { 1271 printk(KERN_ERR "ide-floppy: Can't get flexible disk " 1272 "page parameters\n"); 1273 return 1; 1274 } 1275 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1276 floppy->wp = header->wp; 1277 set_disk_ro(floppy->disk, floppy->wp); 1278 page = (idefloppy_flexible_disk_page_t *) (header + 1); 1279 1280 page->transfer_rate = ntohs(page->transfer_rate); 1281 page->sector_size = ntohs(page->sector_size); 1282 page->cyls = ntohs(page->cyls); 1283 page->rpm = ntohs(page->rpm); 1284 capacity = page->cyls * page->heads * page->sectors * page->sector_size; 1285 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t))) 1286 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 1287 "%d sector size, %d rpm\n", 1288 drive->name, capacity / 1024, page->cyls, 1289 page->heads, page->sectors, 1290 page->transfer_rate / 8, page->sector_size, page->rpm); 1291 1292 floppy->flexible_disk_page = *page; 1293 drive->bios_cyl = page->cyls; 1294 drive->bios_head = page->heads; 1295 drive->bios_sect = page->sectors; 1296 lba_capacity = floppy->blocks * floppy->block_size; 1297 if (capacity < lba_capacity) { 1298 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 1299 "bytes, but the drive only handles %d\n", 1300 drive->name, lba_capacity, capacity); 1301 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; 1302 } 1303 return 0; 1304} 1305 1306static int idefloppy_get_capability_page(ide_drive_t *drive) 1307{ 1308 idefloppy_floppy_t *floppy = drive->driver_data; 1309 idefloppy_pc_t pc; 1310 idefloppy_mode_parameter_header_t *header; 1311 idefloppy_capabilities_page_t *page; 1312 1313 floppy->srfp = 0; 1314 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 1315 MODE_SENSE_CURRENT); 1316 1317 set_bit(PC_SUPPRESS_ERROR, &pc.flags); 1318 if (idefloppy_queue_pc_tail(drive,&pc)) { 1319 return 1; 1320 } 1321 1322 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1323 page= (idefloppy_capabilities_page_t *)(header+1); 1324 floppy->srfp = page->srfp; 1325 return (0); 1326} 1327 1328/* 1329 * Determine if a media is present in the floppy drive, and if so, 1330 * its LBA capacity. 1331 */ 1332static int idefloppy_get_capacity (ide_drive_t *drive) 1333{ 1334 idefloppy_floppy_t *floppy = drive->driver_data; 1335 idefloppy_pc_t pc; 1336 idefloppy_capacity_header_t *header; 1337 idefloppy_capacity_descriptor_t *descriptor; 1338 int i, descriptors, rc = 1, blocks, length; 1339 1340 drive->bios_cyl = 0; 1341 drive->bios_head = drive->bios_sect = 0; 1342 floppy->blocks = 0; 1343 floppy->bs_factor = 1; 1344 set_capacity(floppy->disk, 0); 1345 1346 idefloppy_create_read_capacity_cmd(&pc); 1347 if (idefloppy_queue_pc_tail(drive, &pc)) { 1348 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1349 return 1; 1350 } 1351 header = (idefloppy_capacity_header_t *) pc.buffer; 1352 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); 1353 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1354 1355 for (i = 0; i < descriptors; i++, descriptor++) { 1356 blocks = descriptor->blocks = ntohl(descriptor->blocks); 1357 length = descriptor->length = ntohs(descriptor->length); 1358 1359 if (!i) 1360 { 1361 switch (descriptor->dc) { 1362 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1363 case CAPACITY_UNFORMATTED: 1364 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) 1365 /* 1366 * If it is not a clik drive, break out 1367 * (maintains previous driver behaviour) 1368 */ 1369 break; 1370 case CAPACITY_CURRENT: 1371 /* Normal Zip/LS-120 disks */ 1372 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) 1373 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1374 "sector size\n", drive->name, 1375 blocks * length / 1024, blocks, length); 1376 floppy->capacity = *descriptor; 1377 if (!length || length % 512) { 1378 printk(KERN_NOTICE "%s: %d bytes block size " 1379 "not supported\n", drive->name, length); 1380 } else { 1381 floppy->blocks = blocks; 1382 floppy->block_size = length; 1383 if ((floppy->bs_factor = length / 512) != 1) 1384 printk(KERN_NOTICE "%s: warning: non " 1385 "512 bytes block size not " 1386 "fully supported\n", 1387 drive->name); 1388 rc = 0; 1389 } 1390 break; 1391 case CAPACITY_NO_CARTRIDGE: 1392 /* 1393 * This is a KERN_ERR so it appears on screen 1394 * for the user to see 1395 */ 1396 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1397 break; 1398 case CAPACITY_INVALID: 1399 printk(KERN_ERR "%s: Invalid capacity for disk " 1400 "in drive\n", drive->name); 1401 break; 1402 } 1403 } 1404 if (!i) { 1405 debug_log( "Descriptor 0 Code: %d\n", 1406 descriptor->dc); 1407 } 1408 debug_log( "Descriptor %d: %dkB, %d blocks, %d " 1409 "sector size\n", i, blocks * length / 1024, blocks, 1410 length); 1411 } 1412 1413 /* Clik! disk does not support get_flexible_disk_page */ 1414 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1415 (void) idefloppy_get_flexible_disk_page(drive); 1416 } 1417 1418 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1419 return rc; 1420} 1421 1422/* 1423** Obtain the list of formattable capacities. 1424** Very similar to idefloppy_get_capacity, except that we push the capacity 1425** descriptors to userland, instead of our own structures. 1426** 1427** Userland gives us the following structure: 1428** 1429** struct idefloppy_format_capacities { 1430** int nformats; 1431** struct { 1432** int nblocks; 1433** int blocksize; 1434** } formats[]; 1435** } ; 1436** 1437** userland initializes nformats to the number of allocated formats[] 1438** records. On exit we set nformats to the number of records we've 1439** actually initialized. 1440** 1441*/ 1442 1443static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1444{ 1445 idefloppy_pc_t pc; 1446 idefloppy_capacity_header_t *header; 1447 idefloppy_capacity_descriptor_t *descriptor; 1448 int i, descriptors, blocks, length; 1449 int u_array_size; 1450 int u_index; 1451 int __user *argp; 1452 1453 if (get_user(u_array_size, arg)) 1454 return (-EFAULT); 1455 1456 if (u_array_size <= 0) 1457 return (-EINVAL); 1458 1459 idefloppy_create_read_capacity_cmd(&pc); 1460 if (idefloppy_queue_pc_tail(drive, &pc)) { 1461 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1462 return (-EIO); 1463 } 1464 header = (idefloppy_capacity_header_t *) pc.buffer; 1465 descriptors = header->length / 1466 sizeof(idefloppy_capacity_descriptor_t); 1467 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1468 1469 u_index = 0; 1470 argp = arg + 1; 1471 1472 /* 1473 ** We always skip the first capacity descriptor. That's the 1474 ** current capacity. We are interested in the remaining descriptors, 1475 ** the formattable capacities. 1476 */ 1477 1478 for (i=0; i<descriptors; i++, descriptor++) { 1479 if (u_index >= u_array_size) 1480 break; /* User-supplied buffer too small */ 1481 if (i == 0) 1482 continue; /* Skip the first descriptor */ 1483 1484 blocks = ntohl(descriptor->blocks); 1485 length = ntohs(descriptor->length); 1486 1487 if (put_user(blocks, argp)) 1488 return(-EFAULT); 1489 ++argp; 1490 1491 if (put_user(length, argp)) 1492 return (-EFAULT); 1493 ++argp; 1494 1495 ++u_index; 1496 } 1497 1498 if (put_user(u_index, arg)) 1499 return (-EFAULT); 1500 return (0); 1501} 1502 1503/* 1504** Send ATAPI_FORMAT_UNIT to the drive. 1505** 1506** Userland gives us the following structure: 1507** 1508** struct idefloppy_format_command { 1509** int nblocks; 1510** int blocksize; 1511** int flags; 1512** } ; 1513** 1514** flags is a bitmask, currently, the only defined flag is: 1515** 1516** 0x01 - verify media after format. 1517*/ 1518 1519static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg) 1520{ 1521 int blocks; 1522 int length; 1523 int flags; 1524 idefloppy_pc_t pc; 1525 1526 if (get_user(blocks, arg) || 1527 get_user(length, arg+1) || 1528 get_user(flags, arg+2)) { 1529 return (-EFAULT); 1530 } 1531 1532 /* Get the SFRP bit */ 1533 (void) idefloppy_get_capability_page(drive); 1534 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1535 if (idefloppy_queue_pc_tail(drive, &pc)) { 1536 return (-EIO); 1537 } 1538 1539 return (0); 1540} 1541 1542/* 1543** Get ATAPI_FORMAT_UNIT progress indication. 1544** 1545** Userland gives a pointer to an int. The int is set to a progress 1546** indicator 0-65536, with 65536=100%. 1547** 1548** If the drive does not support format progress indication, we just check 1549** the dsc bit, and return either 0 or 65536. 1550*/ 1551 1552static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1553{ 1554 idefloppy_floppy_t *floppy = drive->driver_data; 1555 idefloppy_pc_t pc; 1556 int progress_indication = 0x10000; 1557 1558 if (floppy->srfp) { 1559 idefloppy_create_request_sense_cmd(&pc); 1560 if (idefloppy_queue_pc_tail(drive, &pc)) { 1561 return (-EIO); 1562 } 1563 1564 if (floppy->sense_key == 2 && 1565 floppy->asc == 4 && 1566 floppy->ascq == 4) { 1567 progress_indication = floppy->progress_indication; 1568 } 1569 /* Else assume format_unit has finished, and we're 1570 ** at 0x10000 */ 1571 } else { 1572 atapi_status_t status; 1573 unsigned long flags; 1574 1575 local_irq_save(flags); 1576 status.all = HWIF(drive)->INB(IDE_STATUS_REG); 1577 local_irq_restore(flags); 1578 1579 progress_indication = !status.b.dsc ? 0 : 0x10000; 1580 } 1581 if (put_user(progress_indication, arg)) 1582 return (-EFAULT); 1583 1584 return (0); 1585} 1586 1587/* 1588 * Return the current floppy capacity. 1589 */ 1590static sector_t idefloppy_capacity (ide_drive_t *drive) 1591{ 1592 idefloppy_floppy_t *floppy = drive->driver_data; 1593 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1594 1595 return capacity; 1596} 1597 1598/* 1599 * idefloppy_identify_device checks if we can support a drive, 1600 * based on the ATAPI IDENTIFY command results. 1601 */ 1602static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) 1603{ 1604 struct idefloppy_id_gcw gcw; 1605#if IDEFLOPPY_DEBUG_INFO 1606 u16 mask,i; 1607 char buffer[80]; 1608#endif /* IDEFLOPPY_DEBUG_INFO */ 1609 1610 *((u16 *) &gcw) = id->config; 1611 1612#ifdef CONFIG_PPC 1613 /* kludge for Apple PowerBook internal zip */ 1614 if ((gcw.device_type == 5) && 1615 !strstr(id->model, "CD-ROM") && 1616 strstr(id->model, "ZIP")) 1617 gcw.device_type = 0; 1618#endif 1619 1620#if IDEFLOPPY_DEBUG_INFO 1621 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); 1622 switch (gcw.protocol) { 1623 case 0: case 1: sprintf(buffer, "ATA");break; 1624 case 2: sprintf(buffer, "ATAPI");break; 1625 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; 1626 } 1627 printk(KERN_INFO "Protocol Type: %s\n", buffer); 1628 switch (gcw.device_type) { 1629 case 0: sprintf(buffer, "Direct-access Device");break; 1630 case 1: sprintf(buffer, "Streaming Tape Device");break; 1631 case 2: case 3: case 4: sprintf (buffer, "Reserved");break; 1632 case 5: sprintf(buffer, "CD-ROM Device");break; 1633 case 6: sprintf(buffer, "Reserved"); 1634 case 7: sprintf(buffer, "Optical memory Device");break; 1635 case 0x1f: sprintf(buffer, "Unknown or no Device type");break; 1636 default: sprintf(buffer, "Reserved"); 1637 } 1638 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); 1639 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 1640 switch (gcw.drq_type) { 1641 case 0: sprintf(buffer, "Microprocessor DRQ");break; 1642 case 1: sprintf(buffer, "Interrupt DRQ");break; 1643 case 2: sprintf(buffer, "Accelerated DRQ");break; 1644 case 3: sprintf(buffer, "Reserved");break; 1645 } 1646 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); 1647 switch (gcw.packet_size) { 1648 case 0: sprintf(buffer, "12 bytes");break; 1649 case 1: sprintf(buffer, "16 bytes");break; 1650 default: sprintf(buffer, "Reserved");break; 1651 } 1652 printk(KERN_INFO "Command Packet Size: %s\n", buffer); 1653 printk(KERN_INFO "Model: %.40s\n",id->model); 1654 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev); 1655 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no); 1656 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512); 1657 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n"); 1658 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n"); 1659 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n"); 1660 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n"); 1661 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n"); 1662 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO); 1663 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA); 1664 printk(KERN_INFO "Single Word DMA supported modes:\n"); 1665 for (i=0,mask=1;i<8;i++,mask=mask << 1) { 1666 if (id->dma_1word & mask) 1667 printk(KERN_INFO " Mode %d%s\n", i, 1668 (id->dma_1word & (mask << 8)) ? " (active)" : ""); 1669 } 1670 printk(KERN_INFO "Multi Word DMA supported modes:\n"); 1671 for (i=0,mask=1;i<8;i++,mask=mask << 1) { 1672 if (id->dma_mword & mask) 1673 printk(KERN_INFO " Mode %d%s\n", i, 1674 (id->dma_mword & (mask << 8)) ? " (active)" : ""); 1675 } 1676 if (id->field_valid & 0x0002) { 1677 printk(KERN_INFO "Enhanced PIO Modes: %s\n", 1678 id->eide_pio_modes & 1 ? "Mode 3":"None"); 1679 if (id->eide_dma_min == 0) 1680 sprintf(buffer, "Not supported"); 1681 else 1682 sprintf(buffer, "%d ns",id->eide_dma_min); 1683 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer); 1684 if (id->eide_dma_time == 0) 1685 sprintf(buffer, "Not supported"); 1686 else 1687 sprintf(buffer, "%d ns",id->eide_dma_time); 1688 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer); 1689 if (id->eide_pio == 0) 1690 sprintf(buffer, "Not supported"); 1691 else 1692 sprintf(buffer, "%d ns",id->eide_pio); 1693 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n", 1694 buffer); 1695 if (id->eide_pio_iordy == 0) 1696 sprintf(buffer, "Not supported"); 1697 else 1698 sprintf(buffer, "%d ns",id->eide_pio_iordy); 1699 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer); 1700 } else 1701 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n"); 1702#endif /* IDEFLOPPY_DEBUG_INFO */ 1703 1704 if (gcw.protocol != 2) 1705 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); 1706 else if (gcw.device_type != 0) 1707 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); 1708 else if (!gcw.removable) 1709 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1710 else if (gcw.drq_type == 3) { 1711 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); 1712 } else if (gcw.packet_size != 0) { 1713 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); 1714 } else 1715 return 1; 1716 return 0; 1717} 1718 1719#ifdef CONFIG_IDE_PROC_FS 1720static void idefloppy_add_settings(ide_drive_t *drive) 1721{ 1722 idefloppy_floppy_t *floppy = drive->driver_data; 1723 1724/* 1725 * drive setting name read/write data type min max mul_factor div_factor data pointer set function 1726 */ 1727 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); 1728 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); 1729 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); 1730 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); 1731} 1732#else 1733static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1734#endif 1735 1736/* 1737 * Driver initialization. 1738 */ 1739static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) 1740{ 1741 struct idefloppy_id_gcw gcw; 1742 1743 *((u16 *) &gcw) = drive->id->config; 1744 floppy->pc = floppy->pc_stack; 1745 if (gcw.drq_type == 1) 1746 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); 1747 1748 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1749 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); 1750 /* This value will be visible in the /proc/ide/hdx/settings */ 1751 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1752 blk_queue_max_sectors(drive->queue, 64); 1753 } 1754 1755 /* 1756 * Guess what? The IOMEGA Clik! drive also needs the 1757 * above fix. It makes nasty clicking noises without 1758 * it, so please don't remove this. 1759 */ 1760 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1761 blk_queue_max_sectors(drive->queue, 64); 1762 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); 1763 } 1764 1765 1766 (void) idefloppy_get_capacity(drive); 1767 idefloppy_add_settings(drive); 1768} 1769 1770static void ide_floppy_remove(ide_drive_t *drive) 1771{ 1772 idefloppy_floppy_t *floppy = drive->driver_data; 1773 struct gendisk *g = floppy->disk; 1774 1775 ide_proc_unregister_driver(drive, floppy->driver); 1776 1777 del_gendisk(g); 1778 1779 ide_floppy_put(floppy); 1780} 1781 1782static void ide_floppy_release(struct kref *kref) 1783{ 1784 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1785 ide_drive_t *drive = floppy->drive; 1786 struct gendisk *g = floppy->disk; 1787 1788 drive->driver_data = NULL; 1789 g->private_data = NULL; 1790 put_disk(g); 1791 kfree(floppy); 1792} 1793 1794#ifdef CONFIG_IDE_PROC_FS 1795static int proc_idefloppy_read_capacity 1796 (char *page, char **start, off_t off, int count, int *eof, void *data) 1797{ 1798 ide_drive_t*drive = (ide_drive_t *)data; 1799 int len; 1800 1801 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); 1802 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 1803} 1804 1805static ide_proc_entry_t idefloppy_proc[] = { 1806 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1807 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1808 { NULL, 0, NULL, NULL } 1809}; 1810#endif /* CONFIG_IDE_PROC_FS */ 1811 1812static int ide_floppy_probe(ide_drive_t *); 1813 1814static ide_driver_t idefloppy_driver = { 1815 .gen_driver = { 1816 .owner = THIS_MODULE, 1817 .name = "ide-floppy", 1818 .bus = &ide_bus_type, 1819 }, 1820 .probe = ide_floppy_probe, 1821 .remove = ide_floppy_remove, 1822 .version = IDEFLOPPY_VERSION, 1823 .media = ide_floppy, 1824 .supports_dsc_overlap = 0, 1825 .do_request = idefloppy_do_request, 1826 .end_request = idefloppy_do_end_request, 1827 .error = __ide_error, 1828 .abort = __ide_abort, 1829#ifdef CONFIG_IDE_PROC_FS 1830 .proc = idefloppy_proc, 1831#endif 1832}; 1833 1834static int idefloppy_open(struct inode *inode, struct file *filp) 1835{ 1836 struct gendisk *disk = inode->i_bdev->bd_disk; 1837 struct ide_floppy_obj *floppy; 1838 ide_drive_t *drive; 1839 idefloppy_pc_t pc; 1840 int ret = 0; 1841 1842 debug_log(KERN_INFO "Reached idefloppy_open\n"); 1843 1844 if (!(floppy = ide_floppy_get(disk))) 1845 return -ENXIO; 1846 1847 drive = floppy->drive; 1848 1849 floppy->openers++; 1850 1851 if (floppy->openers == 1) { 1852 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1853 /* Just in case */ 1854 1855 idefloppy_create_test_unit_ready_cmd(&pc); 1856 if (idefloppy_queue_pc_tail(drive, &pc)) { 1857 idefloppy_create_start_stop_cmd(&pc, 1); 1858 (void) idefloppy_queue_pc_tail(drive, &pc); 1859 } 1860 1861 if (idefloppy_get_capacity (drive) 1862 && (filp->f_flags & O_NDELAY) == 0 1863 /* 1864 ** Allow O_NDELAY to open a drive without a disk, or with 1865 ** an unreadable disk, so that we can get the format 1866 ** capacity of the drive or begin the format - Sam 1867 */ 1868 ) { 1869 ret = -EIO; 1870 goto out_put_floppy; 1871 } 1872 1873 if (floppy->wp && (filp->f_mode & 2)) { 1874 ret = -EROFS; 1875 goto out_put_floppy; 1876 } 1877 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1878 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1879 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1880 idefloppy_create_prevent_cmd(&pc, 1); 1881 (void) idefloppy_queue_pc_tail(drive, &pc); 1882 } 1883 check_disk_change(inode->i_bdev); 1884 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { 1885 ret = -EBUSY; 1886 goto out_put_floppy; 1887 } 1888 return 0; 1889 1890out_put_floppy: 1891 floppy->openers--; 1892 ide_floppy_put(floppy); 1893 return ret; 1894} 1895 1896static int idefloppy_release(struct inode *inode, struct file *filp) 1897{ 1898 struct gendisk *disk = inode->i_bdev->bd_disk; 1899 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1900 ide_drive_t *drive = floppy->drive; 1901 idefloppy_pc_t pc; 1902 1903 debug_log(KERN_INFO "Reached idefloppy_release\n"); 1904 1905 if (floppy->openers == 1) { 1906 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1907 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1908 idefloppy_create_prevent_cmd(&pc, 0); 1909 (void) idefloppy_queue_pc_tail(drive, &pc); 1910 } 1911 1912 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1913 } 1914 1915 floppy->openers--; 1916 1917 ide_floppy_put(floppy); 1918 1919 return 0; 1920} 1921 1922static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1923{ 1924 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1925 ide_drive_t *drive = floppy->drive; 1926 1927 geo->heads = drive->bios_head; 1928 geo->sectors = drive->bios_sect; 1929 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1930 return 0; 1931} 1932 1933static int idefloppy_ioctl(struct inode *inode, struct file *file, 1934 unsigned int cmd, unsigned long arg) 1935{ 1936 struct block_device *bdev = inode->i_bdev; 1937 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1938 ide_drive_t *drive = floppy->drive; 1939 void __user *argp = (void __user *)arg; 1940 int err; 1941 int prevent = (arg) ? 1 : 0; 1942 idefloppy_pc_t pc; 1943 1944 switch (cmd) { 1945 case CDROMEJECT: 1946 prevent = 0; 1947 /* fall through */ 1948 case CDROM_LOCKDOOR: 1949 if (floppy->openers > 1) 1950 return -EBUSY; 1951 1952 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */ 1953 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1954 idefloppy_create_prevent_cmd(&pc, prevent); 1955 (void) idefloppy_queue_pc_tail(drive, &pc); 1956 } 1957 if (cmd == CDROMEJECT) { 1958 idefloppy_create_start_stop_cmd(&pc, 2); 1959 (void) idefloppy_queue_pc_tail(drive, &pc); 1960 } 1961 return 0; 1962 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1963 return 0; 1964 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1965 return idefloppy_get_format_capacities(drive, argp); 1966 case IDEFLOPPY_IOCTL_FORMAT_START: 1967 1968 if (!(file->f_mode & 2)) 1969 return -EPERM; 1970 1971 if (floppy->openers > 1) { 1972 /* Don't format if someone is using the disk */ 1973 1974 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, 1975 &floppy->flags); 1976 return -EBUSY; 1977 } 1978 1979 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1980 1981 err = idefloppy_begin_format(drive, argp); 1982 if (err) 1983 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1984 return err; 1985 /* 1986 ** Note, the bit will be cleared when the device is 1987 ** closed. This is the cleanest way to handle the 1988 ** situation where the drive does not support 1989 ** format progress reporting. 1990 */ 1991 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1992 return idefloppy_get_format_progress(drive, argp); 1993 } 1994 return generic_ide_ioctl(drive, file, bdev, cmd, arg); 1995} 1996 1997static int idefloppy_media_changed(struct gendisk *disk) 1998{ 1999 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2000 ide_drive_t *drive = floppy->drive; 2001 2002 /* do not scan partitions twice if this is a removable device */ 2003 if (drive->attach) { 2004 drive->attach = 0; 2005 return 0; 2006 } 2007 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 2008} 2009 2010static int idefloppy_revalidate_disk(struct gendisk *disk) 2011{ 2012 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2013 set_capacity(disk, idefloppy_capacity(floppy->drive)); 2014 return 0; 2015} 2016 2017static struct block_device_operations idefloppy_ops = { 2018 .owner = THIS_MODULE, 2019 .open = idefloppy_open, 2020 .release = idefloppy_release, 2021 .ioctl = idefloppy_ioctl, 2022 .getgeo = idefloppy_getgeo, 2023 .media_changed = idefloppy_media_changed, 2024 .revalidate_disk= idefloppy_revalidate_disk 2025}; 2026 2027static int ide_floppy_probe(ide_drive_t *drive) 2028{ 2029 idefloppy_floppy_t *floppy; 2030 struct gendisk *g; 2031 2032 if (!strstr("ide-floppy", drive->driver_req)) 2033 goto failed; 2034 if (!drive->present) 2035 goto failed; 2036 if (drive->media != ide_floppy) 2037 goto failed; 2038 if (!idefloppy_identify_device (drive, drive->id)) { 2039 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); 2040 goto failed; 2041 } 2042 if (drive->scsi) { 2043 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); 2044 goto failed; 2045 } 2046 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { 2047 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); 2048 goto failed; 2049 } 2050 2051 g = alloc_disk(1 << PARTN_BITS); 2052 if (!g) 2053 goto out_free_floppy; 2054 2055 ide_init_disk(g, drive); 2056 2057 ide_proc_register_driver(drive, &idefloppy_driver); 2058 2059 kref_init(&floppy->kref); 2060 2061 floppy->drive = drive; 2062 floppy->driver = &idefloppy_driver; 2063 floppy->disk = g; 2064 2065 g->private_data = &floppy->driver; 2066 2067 drive->driver_data = floppy; 2068 2069 idefloppy_setup (drive, floppy); 2070 2071 g->minors = 1 << PARTN_BITS; 2072 g->driverfs_dev = &drive->gendev; 2073 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 2074 g->fops = &idefloppy_ops; 2075 drive->attach = 1; 2076 add_disk(g); 2077 return 0; 2078 2079out_free_floppy: 2080 kfree(floppy); 2081failed: 2082 return -ENODEV; 2083} 2084 2085MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 2086 2087static void __exit idefloppy_exit (void) 2088{ 2089 driver_unregister(&idefloppy_driver.gen_driver); 2090} 2091 2092static int __init idefloppy_init(void) 2093{ 2094 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 2095 return driver_register(&idefloppy_driver.gen_driver); 2096} 2097 2098MODULE_ALIAS("ide:*m-floppy*"); 2099module_init(idefloppy_init); 2100module_exit(idefloppy_exit); 2101MODULE_LICENSE("GPL"); 2102