ide-floppy.c revision 6ab3d5624e172c553004ecc862bfeac16d9d68b7
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 * IDE ATAPI floppy driver. 10 * 11 * The driver currently doesn't have any fancy features, just the bare 12 * minimum read/write support. 13 * 14 * This driver supports the following IDE floppy drives: 15 * 16 * LS-120/240 SuperDisk 17 * Iomega Zip 100/250 18 * Iomega PC Card Clik!/PocketZip 19 * 20 * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many 21 * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive. 22 * 23 * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c. 24 * Ver 0.2 Oct 31 96 Minor changes. 25 * Ver 0.3 Dec 2 96 Fixed error recovery bug. 26 * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl. 27 * Ver 0.5 Feb 21 97 Add partitions support. 28 * Use the minimum of the LBA and CHS capacities. 29 * Avoid hwgroup->rq == NULL on the last irq. 30 * Fix potential null dereferencing with DEBUG_LOG. 31 * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds. 32 * Add media write-protect detection. 33 * Issue START command only if TEST UNIT READY fails. 34 * Add work-around for IOMEGA ZIP revision 21.D. 35 * Remove idefloppy_get_capabilities(). 36 * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of 37 * bytes requested on each interrupt to be zero. 38 * Thanks to <shanos@es.co.nz> for pointing this out. 39 * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com> 40 * Implement low level formatting. Reimplemented 41 * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp 42 * bit. My LS-120 drive barfs on 43 * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me. 44 * Compromise by not reporting a failure to get this 45 * mode page. Implemented four IOCTLs in order to 46 * implement formatting. IOCTls begin with 0x4600, 47 * 0x46 is 'F' as in Format. 48 * Jan 9 01 Userland option to select format verify. 49 * Added PC_SUPPRESS_ERROR flag - some idefloppy drives 50 * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and 51 * return a sense error. Suppress error reporting in 52 * this particular case in order to avoid spurious 53 * errors in syslog. The culprit is 54 * idefloppy_get_capability_page(), so move it to 55 * idefloppy_begin_format() so that it's not used 56 * unless absolutely necessary. 57 * If drive does not support format progress indication 58 * monitor the dsc bit in the status register. 59 * Also, O_NDELAY on open will allow the device to be 60 * opened without a disk available. This can be used to 61 * open an unformatted disk, or get the device capacity. 62 * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by 63 * <paul@paulbristow.net> 64 * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this 65 * driver. Included Powerbook internal zip kludge. 66 * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive 67 * no disk on insert and disk change now works 68 * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere 69 * Ver 0.95 Nov 7 00 Brought across to kernel 2.4 70 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0 71 * including set_bit patch from Rusty Russell 72 * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series 73 * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3 74 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to 75 * fix a lost interrupt problem. It appears the busy 76 * bit was being deasserted by my IOMEGA ATAPI ZIP 100 77 * drive before the drive was actually ready. 78 * Ver 0.98a Oct 29 01 Expose delay value so we can play. 79 * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code 80 * to support new PocketZip drives 81 */ 82 83#define IDEFLOPPY_VERSION "0.99.newide" 84 85#include <linux/module.h> 86#include <linux/types.h> 87#include <linux/string.h> 88#include <linux/kernel.h> 89#include <linux/delay.h> 90#include <linux/timer.h> 91#include <linux/mm.h> 92#include <linux/interrupt.h> 93#include <linux/major.h> 94#include <linux/errno.h> 95#include <linux/genhd.h> 96#include <linux/slab.h> 97#include <linux/cdrom.h> 98#include <linux/ide.h> 99#include <linux/bitops.h> 100#include <linux/mutex.h> 101 102#include <asm/byteorder.h> 103#include <asm/irq.h> 104#include <asm/uaccess.h> 105#include <asm/io.h> 106#include <asm/unaligned.h> 107 108/* 109 * The following are used to debug the driver. 110 */ 111#define IDEFLOPPY_DEBUG_LOG 0 112#define IDEFLOPPY_DEBUG_INFO 0 113#define IDEFLOPPY_DEBUG_BUGS 1 114 115/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 116#define IDEFLOPPY_DEBUG( fmt, args... ) 117 118#if IDEFLOPPY_DEBUG_LOG 119#define debug_log printk 120#else 121#define debug_log(fmt, args... ) do {} while(0) 122#endif 123 124 125/* 126 * Some drives require a longer irq timeout. 127 */ 128#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 129 130/* 131 * After each failed packet command we issue a request sense command 132 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. 133 */ 134#define IDEFLOPPY_MAX_PC_RETRIES 3 135 136/* 137 * With each packet command, we allocate a buffer of 138 * IDEFLOPPY_PC_BUFFER_SIZE bytes. 139 */ 140#define IDEFLOPPY_PC_BUFFER_SIZE 256 141 142/* 143 * In various places in the driver, we need to allocate storage 144 * for packet commands and requests, which will remain valid while 145 * we leave the driver to wait for an interrupt or a timeout event. 146 */ 147#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 148 149/* 150 * Our view of a packet command. 151 */ 152typedef struct idefloppy_packet_command_s { 153 u8 c[12]; /* Actual packet bytes */ 154 int retries; /* On each retry, we increment retries */ 155 int error; /* Error code */ 156 int request_transfer; /* Bytes to transfer */ 157 int actually_transferred; /* Bytes actually transferred */ 158 int buffer_size; /* Size of our data buffer */ 159 int b_count; /* Missing/Available data on the current buffer */ 160 struct request *rq; /* The corresponding request */ 161 u8 *buffer; /* Data buffer */ 162 u8 *current_position; /* Pointer into the above buffer */ 163 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ 164 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ 165 unsigned long flags; /* Status/Action bit flags: long for set_bit */ 166} idefloppy_pc_t; 167 168/* 169 * Packet command flag bits. 170 */ 171#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ 172#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ 173#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ 174#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ 175#define PC_WRITING 5 /* Data direction */ 176 177#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ 178 179/* 180 * Removable Block Access Capabilities Page 181 */ 182typedef struct { 183#if defined(__LITTLE_ENDIAN_BITFIELD) 184 unsigned page_code :6; /* Page code - Should be 0x1b */ 185 unsigned reserved1_6 :1; /* Reserved */ 186 unsigned ps :1; /* Should be 0 */ 187#elif defined(__BIG_ENDIAN_BITFIELD) 188 unsigned ps :1; /* Should be 0 */ 189 unsigned reserved1_6 :1; /* Reserved */ 190 unsigned page_code :6; /* Page code - Should be 0x1b */ 191#else 192#error "Bitfield endianness not defined! Check your byteorder.h" 193#endif 194 u8 page_length; /* Page Length - Should be 0xa */ 195#if defined(__LITTLE_ENDIAN_BITFIELD) 196 unsigned reserved2 :6; 197 unsigned srfp :1; /* Supports reporting progress of format */ 198 unsigned sflp :1; /* System floppy type device */ 199 unsigned tlun :3; /* Total logical units supported by the device */ 200 unsigned reserved3 :3; 201 unsigned sml :1; /* Single / Multiple lun supported */ 202 unsigned ncd :1; /* Non cd optical device */ 203#elif defined(__BIG_ENDIAN_BITFIELD) 204 unsigned sflp :1; /* System floppy type device */ 205 unsigned srfp :1; /* Supports reporting progress of format */ 206 unsigned reserved2 :6; 207 unsigned ncd :1; /* Non cd optical device */ 208 unsigned sml :1; /* Single / Multiple lun supported */ 209 unsigned reserved3 :3; 210 unsigned tlun :3; /* Total logical units supported by the device */ 211#else 212#error "Bitfield endianness not defined! Check your byteorder.h" 213#endif 214 u8 reserved[8]; 215} idefloppy_capabilities_page_t; 216 217/* 218 * Flexible disk page. 219 */ 220typedef struct { 221#if defined(__LITTLE_ENDIAN_BITFIELD) 222 unsigned page_code :6; /* Page code - Should be 0x5 */ 223 unsigned reserved1_6 :1; /* Reserved */ 224 unsigned ps :1; /* The device is capable of saving the page */ 225#elif defined(__BIG_ENDIAN_BITFIELD) 226 unsigned ps :1; /* The device is capable of saving the page */ 227 unsigned reserved1_6 :1; /* Reserved */ 228 unsigned page_code :6; /* Page code - Should be 0x5 */ 229#else 230#error "Bitfield endianness not defined! Check your byteorder.h" 231#endif 232 u8 page_length; /* Page Length - Should be 0x1e */ 233 u16 transfer_rate; /* In kilobits per second */ 234 u8 heads, sectors; /* Number of heads, Number of sectors per track */ 235 u16 sector_size; /* Byes per sector */ 236 u16 cyls; /* Number of cylinders */ 237 u8 reserved10[10]; 238 u8 motor_delay; /* Motor off delay */ 239 u8 reserved21[7]; 240 u16 rpm; /* Rotations per minute */ 241 u8 reserved30[2]; 242} idefloppy_flexible_disk_page_t; 243 244/* 245 * Format capacity 246 */ 247typedef struct { 248 u8 reserved[3]; 249 u8 length; /* Length of the following descriptors in bytes */ 250} idefloppy_capacity_header_t; 251 252typedef struct { 253 u32 blocks; /* Number of blocks */ 254#if defined(__LITTLE_ENDIAN_BITFIELD) 255 unsigned dc :2; /* Descriptor Code */ 256 unsigned reserved :6; 257#elif defined(__BIG_ENDIAN_BITFIELD) 258 unsigned reserved :6; 259 unsigned dc :2; /* Descriptor Code */ 260#else 261#error "Bitfield endianness not defined! Check your byteorder.h" 262#endif 263 u8 length_msb; /* Block Length (MSB)*/ 264 u16 length; /* Block Length */ 265} idefloppy_capacity_descriptor_t; 266 267#define CAPACITY_INVALID 0x00 268#define CAPACITY_UNFORMATTED 0x01 269#define CAPACITY_CURRENT 0x02 270#define CAPACITY_NO_CARTRIDGE 0x03 271 272/* 273 * Most of our global data which we need to save even as we leave the 274 * driver due to an interrupt or a timer event is stored in a variable 275 * of type idefloppy_floppy_t, defined below. 276 */ 277typedef struct ide_floppy_obj { 278 ide_drive_t *drive; 279 ide_driver_t *driver; 280 struct gendisk *disk; 281 struct kref kref; 282 283 /* Current packet command */ 284 idefloppy_pc_t *pc; 285 /* Last failed packet command */ 286 idefloppy_pc_t *failed_pc; 287 /* Packet command stack */ 288 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; 289 /* Next free packet command storage space */ 290 int pc_stack_index; 291 struct request rq_stack[IDEFLOPPY_PC_STACK]; 292 /* We implement a circular array */ 293 int rq_stack_index; 294 295 /* 296 * Last error information 297 */ 298 u8 sense_key, asc, ascq; 299 /* delay this long before sending packet command */ 300 u8 ticks; 301 int progress_indication; 302 303 /* 304 * Device information 305 */ 306 /* Current format */ 307 int blocks, block_size, bs_factor; 308 /* Last format capacity */ 309 idefloppy_capacity_descriptor_t capacity; 310 /* Copy of the flexible disk page */ 311 idefloppy_flexible_disk_page_t flexible_disk_page; 312 /* Write protect */ 313 int wp; 314 /* Supports format progress report */ 315 int srfp; 316 /* Status/Action flags */ 317 unsigned long flags; 318} idefloppy_floppy_t; 319 320#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 321 322/* 323 * Floppy flag bits values. 324 */ 325#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ 326#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ 327#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ 328#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ 329#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ 330#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ 331 332/* 333 * ATAPI floppy drive packet commands 334 */ 335#define IDEFLOPPY_FORMAT_UNIT_CMD 0x04 336#define IDEFLOPPY_INQUIRY_CMD 0x12 337#define IDEFLOPPY_MODE_SELECT_CMD 0x55 338#define IDEFLOPPY_MODE_SENSE_CMD 0x5a 339#define IDEFLOPPY_READ10_CMD 0x28 340#define IDEFLOPPY_READ12_CMD 0xa8 341#define IDEFLOPPY_READ_CAPACITY_CMD 0x23 342#define IDEFLOPPY_REQUEST_SENSE_CMD 0x03 343#define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e 344#define IDEFLOPPY_SEEK_CMD 0x2b 345#define IDEFLOPPY_START_STOP_CMD 0x1b 346#define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00 347#define IDEFLOPPY_VERIFY_CMD 0x2f 348#define IDEFLOPPY_WRITE10_CMD 0x2a 349#define IDEFLOPPY_WRITE12_CMD 0xaa 350#define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e 351 352/* 353 * Defines for the mode sense command 354 */ 355#define MODE_SENSE_CURRENT 0x00 356#define MODE_SENSE_CHANGEABLE 0x01 357#define MODE_SENSE_DEFAULT 0x02 358#define MODE_SENSE_SAVED 0x03 359 360/* 361 * IOCTLs used in low-level formatting. 362 */ 363 364#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 365#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 366#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 367#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 368 369#if 0 370/* 371 * Special requests for our block device strategy routine. 372 */ 373#define IDEFLOPPY_FIRST_RQ 90 374 375/* 376 * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue. 377 */ 378#define IDEFLOPPY_PC_RQ 90 379 380#define IDEFLOPPY_LAST_RQ 90 381 382/* 383 * A macro which can be used to check if a given request command 384 * originated in the driver or in the buffer cache layer. 385 */ 386#define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ)) 387 388#endif 389 390/* 391 * Error codes which are returned in rq->errors to the higher part 392 * of the driver. 393 */ 394#define IDEFLOPPY_ERROR_GENERAL 101 395 396/* 397 * The following is used to format the general configuration word of 398 * the ATAPI IDENTIFY DEVICE command. 399 */ 400struct idefloppy_id_gcw { 401#if defined(__LITTLE_ENDIAN_BITFIELD) 402 unsigned packet_size :2; /* Packet Size */ 403 unsigned reserved234 :3; /* Reserved */ 404 unsigned drq_type :2; /* Command packet DRQ type */ 405 unsigned removable :1; /* Removable media */ 406 unsigned device_type :5; /* Device type */ 407 unsigned reserved13 :1; /* Reserved */ 408 unsigned protocol :2; /* Protocol type */ 409#elif defined(__BIG_ENDIAN_BITFIELD) 410 unsigned protocol :2; /* Protocol type */ 411 unsigned reserved13 :1; /* Reserved */ 412 unsigned device_type :5; /* Device type */ 413 unsigned removable :1; /* Removable media */ 414 unsigned drq_type :2; /* Command packet DRQ type */ 415 unsigned reserved234 :3; /* Reserved */ 416 unsigned packet_size :2; /* Packet Size */ 417#else 418#error "Bitfield endianness not defined! Check your byteorder.h" 419#endif 420}; 421 422/* 423 * INQUIRY packet command - Data Format 424 */ 425typedef struct { 426#if defined(__LITTLE_ENDIAN_BITFIELD) 427 unsigned device_type :5; /* Peripheral Device Type */ 428 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 429 unsigned reserved1_6t0 :7; /* Reserved */ 430 unsigned rmb :1; /* Removable Medium Bit */ 431 unsigned ansi_version :3; /* ANSI Version */ 432 unsigned ecma_version :3; /* ECMA Version */ 433 unsigned iso_version :2; /* ISO Version */ 434 unsigned response_format :4; /* Response Data Format */ 435 unsigned reserved3_45 :2; /* Reserved */ 436 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 437 unsigned reserved3_7 :1; /* AENC - Reserved */ 438#elif defined(__BIG_ENDIAN_BITFIELD) 439 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 440 unsigned device_type :5; /* Peripheral Device Type */ 441 unsigned rmb :1; /* Removable Medium Bit */ 442 unsigned reserved1_6t0 :7; /* Reserved */ 443 unsigned iso_version :2; /* ISO Version */ 444 unsigned ecma_version :3; /* ECMA Version */ 445 unsigned ansi_version :3; /* ANSI Version */ 446 unsigned reserved3_7 :1; /* AENC - Reserved */ 447 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 448 unsigned reserved3_45 :2; /* Reserved */ 449 unsigned response_format :4; /* Response Data Format */ 450#else 451#error "Bitfield endianness not defined! Check your byteorder.h" 452#endif 453 u8 additional_length; /* Additional Length (total_length-4) */ 454 u8 rsv5, rsv6, rsv7; /* Reserved */ 455 u8 vendor_id[8]; /* Vendor Identification */ 456 u8 product_id[16]; /* Product Identification */ 457 u8 revision_level[4]; /* Revision Level */ 458 u8 vendor_specific[20]; /* Vendor Specific - Optional */ 459 u8 reserved56t95[40]; /* Reserved - Optional */ 460 /* Additional information may be returned */ 461} idefloppy_inquiry_result_t; 462 463/* 464 * REQUEST SENSE packet command result - Data Format. 465 */ 466typedef struct { 467#if defined(__LITTLE_ENDIAN_BITFIELD) 468 unsigned error_code :7; /* Current error (0x70) */ 469 unsigned valid :1; /* The information field conforms to SFF-8070i */ 470 u8 reserved1 :8; /* Reserved */ 471 unsigned sense_key :4; /* Sense Key */ 472 unsigned reserved2_4 :1; /* Reserved */ 473 unsigned ili :1; /* Incorrect Length Indicator */ 474 unsigned reserved2_67 :2; 475#elif defined(__BIG_ENDIAN_BITFIELD) 476 unsigned valid :1; /* The information field conforms to SFF-8070i */ 477 unsigned error_code :7; /* Current error (0x70) */ 478 u8 reserved1 :8; /* Reserved */ 479 unsigned reserved2_67 :2; 480 unsigned ili :1; /* Incorrect Length Indicator */ 481 unsigned reserved2_4 :1; /* Reserved */ 482 unsigned sense_key :4; /* Sense Key */ 483#else 484#error "Bitfield endianness not defined! Check your byteorder.h" 485#endif 486 u32 information __attribute__ ((packed)); 487 u8 asl; /* Additional sense length (n-7) */ 488 u32 command_specific; /* Additional command specific information */ 489 u8 asc; /* Additional Sense Code */ 490 u8 ascq; /* Additional Sense Code Qualifier */ 491 u8 replaceable_unit_code; /* Field Replaceable Unit Code */ 492 u8 sksv[3]; 493 u8 pad[2]; /* Padding to 20 bytes */ 494} idefloppy_request_sense_result_t; 495 496/* 497 * Pages of the SELECT SENSE / MODE SENSE packet commands. 498 */ 499#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 500#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 501 502/* 503 * Mode Parameter Header for the MODE SENSE packet command 504 */ 505typedef struct { 506 u16 mode_data_length; /* Length of the following data transfer */ 507 u8 medium_type; /* Medium Type */ 508#if defined(__LITTLE_ENDIAN_BITFIELD) 509 unsigned reserved3 :7; 510 unsigned wp :1; /* Write protect */ 511#elif defined(__BIG_ENDIAN_BITFIELD) 512 unsigned wp :1; /* Write protect */ 513 unsigned reserved3 :7; 514#else 515#error "Bitfield endianness not defined! Check your byteorder.h" 516#endif 517 u8 reserved[4]; 518} idefloppy_mode_parameter_header_t; 519 520static DEFINE_MUTEX(idefloppy_ref_mutex); 521 522#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 523 524#define ide_floppy_g(disk) \ 525 container_of((disk)->private_data, struct ide_floppy_obj, driver) 526 527static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 528{ 529 struct ide_floppy_obj *floppy = NULL; 530 531 mutex_lock(&idefloppy_ref_mutex); 532 floppy = ide_floppy_g(disk); 533 if (floppy) 534 kref_get(&floppy->kref); 535 mutex_unlock(&idefloppy_ref_mutex); 536 return floppy; 537} 538 539static void ide_floppy_release(struct kref *); 540 541static void ide_floppy_put(struct ide_floppy_obj *floppy) 542{ 543 mutex_lock(&idefloppy_ref_mutex); 544 kref_put(&floppy->kref, ide_floppy_release); 545 mutex_unlock(&idefloppy_ref_mutex); 546} 547 548/* 549 * Too bad. The drive wants to send us data which we are not ready to accept. 550 * Just throw it away. 551 */ 552static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) 553{ 554 while (bcount--) 555 (void) HWIF(drive)->INB(IDE_DATA_REG); 556} 557 558#if IDEFLOPPY_DEBUG_BUGS 559static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) 560{ 561 while (bcount--) 562 HWIF(drive)->OUTB(0, IDE_DATA_REG); 563} 564#endif /* IDEFLOPPY_DEBUG_BUGS */ 565 566 567/* 568 * idefloppy_do_end_request is used to finish servicing a request. 569 * 570 * For read/write requests, we will call ide_end_request to pass to the 571 * next buffer. 572 */ 573static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) 574{ 575 idefloppy_floppy_t *floppy = drive->driver_data; 576 struct request *rq = HWGROUP(drive)->rq; 577 int error; 578 579 debug_log(KERN_INFO "Reached idefloppy_end_request\n"); 580 581 switch (uptodate) { 582 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 583 case 1: error = 0; break; 584 default: error = uptodate; 585 } 586 if (error) 587 floppy->failed_pc = NULL; 588 /* Why does this happen? */ 589 if (!rq) 590 return 0; 591 if (!(rq->flags & REQ_SPECIAL)) { //if (!IDEFLOPPY_RQ_CMD (rq->cmd)) { 592 /* our real local end request function */ 593 ide_end_request(drive, uptodate, nsecs); 594 return 0; 595 } 596 rq->errors = error; 597 /* fixme: need to move this local also */ 598 ide_end_drive_cmd(drive, 0, 0); 599 return 0; 600} 601 602static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 603{ 604 struct request *rq = pc->rq; 605 struct bio_vec *bvec; 606 struct bio *bio; 607 unsigned long flags; 608 char *data; 609 int count, i, done = 0; 610 611 rq_for_each_bio(bio, rq) { 612 bio_for_each_segment(bvec, bio, i) { 613 if (!bcount) 614 break; 615 616 count = min(bvec->bv_len, bcount); 617 618 data = bvec_kmap_irq(bvec, &flags); 619 drive->hwif->atapi_input_bytes(drive, data, count); 620 bvec_kunmap_irq(data, &flags); 621 622 bcount -= count; 623 pc->b_count += count; 624 done += count; 625 } 626 } 627 628 idefloppy_do_end_request(drive, 1, done >> 9); 629 630 if (bcount) { 631 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); 632 idefloppy_discard_data(drive, bcount); 633 } 634} 635 636static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 637{ 638 struct request *rq = pc->rq; 639 struct bio *bio; 640 struct bio_vec *bvec; 641 unsigned long flags; 642 int count, i, done = 0; 643 char *data; 644 645 rq_for_each_bio(bio, rq) { 646 bio_for_each_segment(bvec, bio, i) { 647 if (!bcount) 648 break; 649 650 count = min(bvec->bv_len, bcount); 651 652 data = bvec_kmap_irq(bvec, &flags); 653 drive->hwif->atapi_output_bytes(drive, data, count); 654 bvec_kunmap_irq(data, &flags); 655 656 bcount -= count; 657 pc->b_count += count; 658 done += count; 659 } 660 } 661 662 idefloppy_do_end_request(drive, 1, done >> 9); 663 664#if IDEFLOPPY_DEBUG_BUGS 665 if (bcount) { 666 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); 667 idefloppy_write_zeros(drive, bcount); 668 } 669#endif 670} 671 672static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) 673{ 674 struct request *rq = pc->rq; 675 struct bio *bio = rq->bio; 676 677 while ((bio = rq->bio) != NULL) 678 idefloppy_do_end_request(drive, 1, 0); 679} 680 681/* 682 * idefloppy_queue_pc_head generates a new packet command request in front 683 * of the request queue, before the current request, so that it will be 684 * processed immediately, on the next pass through the driver. 685 */ 686static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) 687{ 688 struct ide_floppy_obj *floppy = drive->driver_data; 689 690 ide_init_drive_cmd(rq); 691 rq->buffer = (char *) pc; 692 rq->flags = REQ_SPECIAL; //rq->cmd = IDEFLOPPY_PC_RQ; 693 rq->rq_disk = floppy->disk; 694 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 695} 696 697static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) 698{ 699 idefloppy_floppy_t *floppy = drive->driver_data; 700 701 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 702 floppy->pc_stack_index=0; 703 return (&floppy->pc_stack[floppy->pc_stack_index++]); 704} 705 706static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) 707{ 708 idefloppy_floppy_t *floppy = drive->driver_data; 709 710 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 711 floppy->rq_stack_index = 0; 712 return (&floppy->rq_stack[floppy->rq_stack_index++]); 713} 714 715/* 716 * idefloppy_analyze_error is called on each failed packet command retry 717 * to analyze the request sense. 718 */ 719static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result) 720{ 721 idefloppy_floppy_t *floppy = drive->driver_data; 722 723 floppy->sense_key = result->sense_key; 724 floppy->asc = result->asc; 725 floppy->ascq = result->ascq; 726 floppy->progress_indication = result->sksv[0] & 0x80 ? 727 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000; 728 if (floppy->failed_pc) 729 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, " 730 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0], 731 result->sense_key, result->asc, result->ascq); 732 else 733 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, " 734 "ascq = %x\n", result->sense_key, 735 result->asc, result->ascq); 736} 737 738static void idefloppy_request_sense_callback (ide_drive_t *drive) 739{ 740 idefloppy_floppy_t *floppy = drive->driver_data; 741 742 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 743 744 if (!floppy->pc->error) { 745 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer); 746 idefloppy_do_end_request(drive, 1, 0); 747 } else { 748 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n"); 749 idefloppy_do_end_request(drive, 0, 0); 750 } 751} 752 753/* 754 * General packet command callback function. 755 */ 756static void idefloppy_pc_callback (ide_drive_t *drive) 757{ 758 idefloppy_floppy_t *floppy = drive->driver_data; 759 760 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 761 762 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); 763} 764 765/* 766 * idefloppy_init_pc initializes a packet command. 767 */ 768static void idefloppy_init_pc (idefloppy_pc_t *pc) 769{ 770 memset(pc->c, 0, 12); 771 pc->retries = 0; 772 pc->flags = 0; 773 pc->request_transfer = 0; 774 pc->buffer = pc->pc_buffer; 775 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; 776 pc->callback = &idefloppy_pc_callback; 777} 778 779static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) 780{ 781 idefloppy_init_pc(pc); 782 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD; 783 pc->c[4] = 255; 784 pc->request_transfer = 18; 785 pc->callback = &idefloppy_request_sense_callback; 786} 787 788/* 789 * idefloppy_retry_pc is called when an error was detected during the 790 * last packet command. We queue a request sense packet command in 791 * the head of the request list. 792 */ 793static void idefloppy_retry_pc (ide_drive_t *drive) 794{ 795 idefloppy_pc_t *pc; 796 struct request *rq; 797 atapi_error_t error; 798 799 error.all = HWIF(drive)->INB(IDE_ERROR_REG); 800 pc = idefloppy_next_pc_storage(drive); 801 rq = idefloppy_next_rq_storage(drive); 802 idefloppy_create_request_sense_cmd(pc); 803 idefloppy_queue_pc_head(drive, pc, rq); 804} 805 806/* 807 * idefloppy_pc_intr is the usual interrupt handler which will be called 808 * during a packet command. 809 */ 810static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) 811{ 812 idefloppy_floppy_t *floppy = drive->driver_data; 813 atapi_status_t status; 814 atapi_bcount_t bcount; 815 atapi_ireason_t ireason; 816 idefloppy_pc_t *pc = floppy->pc; 817 struct request *rq = pc->rq; 818 unsigned int temp; 819 820 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n", 821 __FUNCTION__); 822 823 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 824 if (HWIF(drive)->ide_dma_end(drive)) { 825 set_bit(PC_DMA_ERROR, &pc->flags); 826 } else { 827 pc->actually_transferred = pc->request_transfer; 828 idefloppy_update_buffers(drive, pc); 829 } 830 debug_log(KERN_INFO "ide-floppy: DMA finished\n"); 831 } 832 833 /* Clear the interrupt */ 834 status.all = HWIF(drive)->INB(IDE_STATUS_REG); 835 836 if (!status.b.drq) { /* No more interrupts */ 837 debug_log(KERN_INFO "Packet command completed, %d bytes " 838 "transferred\n", pc->actually_transferred); 839 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); 840 841 local_irq_enable(); 842 843 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) { 844 /* Error detected */ 845 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n", 846 drive->name); 847 rq->errors++; 848 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 849 printk(KERN_ERR "ide-floppy: I/O error in " 850 "request sense command\n"); 851 return ide_do_reset(drive); 852 } 853 /* Retry operation */ 854 idefloppy_retry_pc(drive); 855 /* queued, but not started */ 856 return ide_stopped; 857 } 858 pc->error = 0; 859 if (floppy->failed_pc == pc) 860 floppy->failed_pc = NULL; 861 /* Command finished - Call the callback function */ 862 pc->callback(drive); 863 return ide_stopped; 864 } 865 866 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 867 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 868 "more interrupts in DMA mode\n"); 869 (void)__ide_dma_off(drive); 870 return ide_do_reset(drive); 871 } 872 873 /* Get the number of bytes to transfer */ 874 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG); 875 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG); 876 /* on this interrupt */ 877 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 878 879 if (ireason.b.cod) { 880 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); 881 return ide_do_reset(drive); 882 } 883 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) { 884 /* Hopefully, we will never get here */ 885 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 886 ireason.b.io ? "Write":"Read"); 887 printk(KERN_ERR "but the floppy wants us to %s !\n", 888 ireason.b.io ? "Read":"Write"); 889 return ide_do_reset(drive); 890 } 891 if (!test_bit(PC_WRITING, &pc->flags)) { 892 /* Reading - Check that we have enough space */ 893 temp = pc->actually_transferred + bcount.all; 894 if (temp > pc->request_transfer) { 895 if (temp > pc->buffer_size) { 896 printk(KERN_ERR "ide-floppy: The floppy wants " 897 "to send us more data than expected " 898 "- discarding data\n"); 899 idefloppy_discard_data(drive,bcount.all); 900 BUG_ON(HWGROUP(drive)->handler != NULL); 901 ide_set_handler(drive, 902 &idefloppy_pc_intr, 903 IDEFLOPPY_WAIT_CMD, 904 NULL); 905 return ide_started; 906 } 907 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to " 908 "send us more data than expected - " 909 "allowing transfer\n"); 910 } 911 } 912 if (test_bit(PC_WRITING, &pc->flags)) { 913 if (pc->buffer != NULL) 914 /* Write the current buffer */ 915 HWIF(drive)->atapi_output_bytes(drive, 916 pc->current_position, 917 bcount.all); 918 else 919 idefloppy_output_buffers(drive, pc, bcount.all); 920 } else { 921 if (pc->buffer != NULL) 922 /* Read the current buffer */ 923 HWIF(drive)->atapi_input_bytes(drive, 924 pc->current_position, 925 bcount.all); 926 else 927 idefloppy_input_buffers(drive, pc, bcount.all); 928 } 929 /* Update the current position */ 930 pc->actually_transferred += bcount.all; 931 pc->current_position += bcount.all; 932 933 BUG_ON(HWGROUP(drive)->handler != NULL); 934 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ 935 return ide_started; 936} 937 938/* 939 * This is the original routine that did the packet transfer. 940 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 941 * for that drive below. The algorithm is chosen based on drive type 942 */ 943static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) 944{ 945 ide_startstop_t startstop; 946 idefloppy_floppy_t *floppy = drive->driver_data; 947 atapi_ireason_t ireason; 948 949 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 950 printk(KERN_ERR "ide-floppy: Strange, packet command " 951 "initiated yet DRQ isn't asserted\n"); 952 return startstop; 953 } 954 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 955 if (!ireason.b.cod || ireason.b.io) { 956 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 957 "issuing a packet command\n"); 958 return ide_do_reset(drive); 959 } 960 BUG_ON(HWGROUP(drive)->handler != NULL); 961 /* Set the interrupt routine */ 962 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 963 /* Send the actual packet */ 964 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 965 return ide_started; 966} 967 968 969/* 970 * What we have here is a classic case of a top half / bottom half 971 * interrupt service routine. In interrupt mode, the device sends 972 * an interrupt to signal it's ready to receive a packet. However, 973 * we need to delay about 2-3 ticks before issuing the packet or we 974 * gets in trouble. 975 * 976 * So, follow carefully. transfer_pc1 is called as an interrupt (or 977 * directly). In either case, when the device says it's ready for a 978 * packet, we schedule the packet transfer to occur about 2-3 ticks 979 * later in transfer_pc2. 980 */ 981static int idefloppy_transfer_pc2 (ide_drive_t *drive) 982{ 983 idefloppy_floppy_t *floppy = drive->driver_data; 984 985 /* Send the actual packet */ 986 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 987 /* Timeout for the packet command */ 988 return IDEFLOPPY_WAIT_CMD; 989} 990 991static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) 992{ 993 idefloppy_floppy_t *floppy = drive->driver_data; 994 ide_startstop_t startstop; 995 atapi_ireason_t ireason; 996 997 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 998 printk(KERN_ERR "ide-floppy: Strange, packet command " 999 "initiated yet DRQ isn't asserted\n"); 1000 return startstop; 1001 } 1002 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 1003 if (!ireason.b.cod || ireason.b.io) { 1004 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 1005 "while issuing a packet command\n"); 1006 return ide_do_reset(drive); 1007 } 1008 /* 1009 * The following delay solves a problem with ATAPI Zip 100 drives 1010 * where the Busy flag was apparently being deasserted before the 1011 * unit was ready to receive data. This was happening on a 1012 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 1013 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 1014 * used until after the packet is moved in about 50 msec. 1015 */ 1016 BUG_ON(HWGROUP(drive)->handler != NULL); 1017 ide_set_handler(drive, 1018 &idefloppy_pc_intr, /* service routine for packet command */ 1019 floppy->ticks, /* wait this long before "failing" */ 1020 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ 1021 return ide_started; 1022} 1023 1024/** 1025 * idefloppy_should_report_error() 1026 * 1027 * Supresses error messages resulting from Medium not present 1028 */ 1029static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy) 1030{ 1031 if (floppy->sense_key == 0x02 && 1032 floppy->asc == 0x3a && 1033 floppy->ascq == 0x00) 1034 return 0; 1035 return 1; 1036} 1037 1038/* 1039 * Issue a packet command 1040 */ 1041static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) 1042{ 1043 idefloppy_floppy_t *floppy = drive->driver_data; 1044 ide_hwif_t *hwif = drive->hwif; 1045 atapi_feature_t feature; 1046 atapi_bcount_t bcount; 1047 ide_handler_t *pkt_xfer_routine; 1048 1049#if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone 1050 and have lived on another thread's stack; that stack may have become 1051 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */ 1052#if IDEFLOPPY_DEBUG_BUGS 1053 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD && 1054 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 1055 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - " 1056 "Two request sense in serial were issued\n"); 1057 } 1058#endif /* IDEFLOPPY_DEBUG_BUGS */ 1059#endif 1060 1061 if (floppy->failed_pc == NULL && 1062 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) 1063 floppy->failed_pc = pc; 1064 /* Set the current packet command */ 1065 floppy->pc = pc; 1066 1067 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || 1068 test_bit(PC_ABORT, &pc->flags)) { 1069 /* 1070 * We will "abort" retrying a packet command in case 1071 * a legitimate error code was received. 1072 */ 1073 if (!test_bit(PC_ABORT, &pc->flags)) { 1074 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) { 1075 if (idefloppy_should_report_error(floppy)) 1076 printk(KERN_ERR "ide-floppy: %s: I/O error, " 1077 "pc = %2x, key = %2x, " 1078 "asc = %2x, ascq = %2x\n", 1079 drive->name, pc->c[0], 1080 floppy->sense_key, 1081 floppy->asc, floppy->ascq); 1082 } 1083 /* Giving up */ 1084 pc->error = IDEFLOPPY_ERROR_GENERAL; 1085 } 1086 floppy->failed_pc = NULL; 1087 pc->callback(drive); 1088 return ide_stopped; 1089 } 1090 1091 debug_log(KERN_INFO "Retry number - %d\n",pc->retries); 1092 1093 pc->retries++; 1094 /* We haven't transferred any data yet */ 1095 pc->actually_transferred = 0; 1096 pc->current_position = pc->buffer; 1097 bcount.all = min(pc->request_transfer, 63 * 1024); 1098 1099 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) { 1100 (void)__ide_dma_off(drive); 1101 } 1102 feature.all = 0; 1103 1104 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) 1105 feature.b.dma = !hwif->dma_setup(drive); 1106 1107 if (IDE_CONTROL_REG) 1108 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); 1109 /* Use PIO/DMA */ 1110 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG); 1111 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG); 1112 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG); 1113 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG); 1114 1115 if (feature.b.dma) { /* Begin DMA, if necessary */ 1116 set_bit(PC_DMA_IN_PROGRESS, &pc->flags); 1117 hwif->dma_start(drive); 1118 } 1119 1120 /* Can we transfer the packet when we get the interrupt or wait? */ 1121 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { 1122 /* wait */ 1123 pkt_xfer_routine = &idefloppy_transfer_pc1; 1124 } else { 1125 /* immediate */ 1126 pkt_xfer_routine = &idefloppy_transfer_pc; 1127 } 1128 1129 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { 1130 /* Issue the packet command */ 1131 ide_execute_command(drive, WIN_PACKETCMD, 1132 pkt_xfer_routine, 1133 IDEFLOPPY_WAIT_CMD, 1134 NULL); 1135 return ide_started; 1136 } else { 1137 /* Issue the packet command */ 1138 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); 1139 return (*pkt_xfer_routine) (drive); 1140 } 1141} 1142 1143static void idefloppy_rw_callback (ide_drive_t *drive) 1144{ 1145 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n"); 1146 1147 idefloppy_do_end_request(drive, 1, 0); 1148 return; 1149} 1150 1151static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) 1152{ 1153 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, " 1154 "prevent = %d\n", prevent); 1155 1156 idefloppy_init_pc(pc); 1157 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD; 1158 pc->c[4] = prevent; 1159} 1160 1161static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) 1162{ 1163 idefloppy_init_pc(pc); 1164 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD; 1165 pc->c[7] = 255; 1166 pc->c[8] = 255; 1167 pc->request_transfer = 255; 1168} 1169 1170static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, 1171 int flags) 1172{ 1173 idefloppy_init_pc(pc); 1174 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD; 1175 pc->c[1] = 0x17; 1176 1177 memset(pc->buffer, 0, 12); 1178 pc->buffer[1] = 0xA2; 1179 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 1180 1181 if (flags & 1) /* Verify bit on... */ 1182 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ 1183 pc->buffer[3] = 8; 1184 1185 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4])); 1186 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8])); 1187 pc->buffer_size=12; 1188 set_bit(PC_WRITING, &pc->flags); 1189} 1190 1191/* 1192 * A mode sense command is used to "sense" floppy parameters. 1193 */ 1194static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) 1195{ 1196 u16 length = sizeof(idefloppy_mode_parameter_header_t); 1197 1198 idefloppy_init_pc(pc); 1199 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD; 1200 pc->c[1] = 0; 1201 pc->c[2] = page_code + (type << 6); 1202 1203 switch (page_code) { 1204 case IDEFLOPPY_CAPABILITIES_PAGE: 1205 length += 12; 1206 break; 1207 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 1208 length += 32; 1209 break; 1210 default: 1211 printk(KERN_ERR "ide-floppy: unsupported page code " 1212 "in create_mode_sense_cmd\n"); 1213 } 1214 put_unaligned(htons(length), (u16 *) &pc->c[7]); 1215 pc->request_transfer = length; 1216} 1217 1218static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) 1219{ 1220 idefloppy_init_pc(pc); 1221 pc->c[0] = IDEFLOPPY_START_STOP_CMD; 1222 pc->c[4] = start; 1223} 1224 1225static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) 1226{ 1227 idefloppy_init_pc(pc); 1228 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD; 1229} 1230 1231static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) 1232{ 1233 int block = sector / floppy->bs_factor; 1234 int blocks = rq->nr_sectors / floppy->bs_factor; 1235 int cmd = rq_data_dir(rq); 1236 1237 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", 1238 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), 1239 block, blocks); 1240 1241 idefloppy_init_pc(pc); 1242 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { 1243 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD; 1244 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]); 1245 } else { 1246 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD; 1247 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]); 1248 } 1249 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]); 1250 pc->callback = &idefloppy_rw_callback; 1251 pc->rq = rq; 1252 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 1253 if (rq->flags & REQ_RW) 1254 set_bit(PC_WRITING, &pc->flags); 1255 pc->buffer = NULL; 1256 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; 1257 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 1258} 1259 1260static int 1261idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) 1262{ 1263 /* 1264 * just support eject for now, it would not be hard to make the 1265 * REQ_BLOCK_PC support fully-featured 1266 */ 1267 if (rq->cmd[0] != IDEFLOPPY_START_STOP_CMD) 1268 return 1; 1269 1270 idefloppy_init_pc(pc); 1271 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 1272 return 0; 1273} 1274 1275/* 1276 * idefloppy_do_request is our request handling function. 1277 */ 1278static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) 1279{ 1280 idefloppy_floppy_t *floppy = drive->driver_data; 1281 idefloppy_pc_t *pc; 1282 unsigned long block = (unsigned long)block_s; 1283 1284 debug_log(KERN_INFO "rq_status: %d, dev: %s, flags: %lx, errors: %d\n", 1285 rq->rq_status, 1286 rq->rq_disk ? rq->rq_disk->disk_name : "?", 1287 rq->flags, rq->errors); 1288 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, " 1289 "current_nr_sectors: %d\n", (long)rq->sector, 1290 rq->nr_sectors, rq->current_nr_sectors); 1291 1292 if (rq->errors >= ERROR_MAX) { 1293 if (floppy->failed_pc != NULL) { 1294 if (idefloppy_should_report_error(floppy)) 1295 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x," 1296 " key = %2x, asc = %2x, ascq = %2x\n", 1297 drive->name, floppy->failed_pc->c[0], 1298 floppy->sense_key, floppy->asc, floppy->ascq); 1299 } 1300 else 1301 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 1302 drive->name); 1303 idefloppy_do_end_request(drive, 0, 0); 1304 return ide_stopped; 1305 } 1306 if (rq->flags & REQ_CMD) { 1307 if (((long)rq->sector % floppy->bs_factor) || 1308 (rq->nr_sectors % floppy->bs_factor)) { 1309 printk("%s: unsupported r/w request size\n", 1310 drive->name); 1311 idefloppy_do_end_request(drive, 0, 0); 1312 return ide_stopped; 1313 } 1314 pc = idefloppy_next_pc_storage(drive); 1315 idefloppy_create_rw_cmd(floppy, pc, rq, block); 1316 } else if (rq->flags & REQ_SPECIAL) { 1317 pc = (idefloppy_pc_t *) rq->buffer; 1318 } else if (rq->flags & REQ_BLOCK_PC) { 1319 pc = idefloppy_next_pc_storage(drive); 1320 if (idefloppy_blockpc_cmd(floppy, pc, rq)) { 1321 idefloppy_do_end_request(drive, 0, 0); 1322 return ide_stopped; 1323 } 1324 } else { 1325 blk_dump_rq_flags(rq, 1326 "ide-floppy: unsupported command in queue"); 1327 idefloppy_do_end_request(drive, 0, 0); 1328 return ide_stopped; 1329 } 1330 1331 pc->rq = rq; 1332 return idefloppy_issue_pc(drive, pc); 1333} 1334 1335/* 1336 * idefloppy_queue_pc_tail adds a special packet command request to the 1337 * tail of the request queue, and waits for it to be serviced. 1338 */ 1339static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) 1340{ 1341 struct ide_floppy_obj *floppy = drive->driver_data; 1342 struct request rq; 1343 1344 ide_init_drive_cmd (&rq); 1345 rq.buffer = (char *) pc; 1346 rq.flags = REQ_SPECIAL; // rq.cmd = IDEFLOPPY_PC_RQ; 1347 rq.rq_disk = floppy->disk; 1348 1349 return ide_do_drive_cmd(drive, &rq, ide_wait); 1350} 1351 1352/* 1353 * Look at the flexible disk page parameters. We will ignore the CHS 1354 * capacity parameters and use the LBA parameters instead. 1355 */ 1356static int idefloppy_get_flexible_disk_page (ide_drive_t *drive) 1357{ 1358 idefloppy_floppy_t *floppy = drive->driver_data; 1359 idefloppy_pc_t pc; 1360 idefloppy_mode_parameter_header_t *header; 1361 idefloppy_flexible_disk_page_t *page; 1362 int capacity, lba_capacity; 1363 1364 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT); 1365 if (idefloppy_queue_pc_tail(drive,&pc)) { 1366 printk(KERN_ERR "ide-floppy: Can't get flexible disk " 1367 "page parameters\n"); 1368 return 1; 1369 } 1370 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1371 floppy->wp = header->wp; 1372 set_disk_ro(floppy->disk, floppy->wp); 1373 page = (idefloppy_flexible_disk_page_t *) (header + 1); 1374 1375 page->transfer_rate = ntohs(page->transfer_rate); 1376 page->sector_size = ntohs(page->sector_size); 1377 page->cyls = ntohs(page->cyls); 1378 page->rpm = ntohs(page->rpm); 1379 capacity = page->cyls * page->heads * page->sectors * page->sector_size; 1380 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t))) 1381 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 1382 "%d sector size, %d rpm\n", 1383 drive->name, capacity / 1024, page->cyls, 1384 page->heads, page->sectors, 1385 page->transfer_rate / 8, page->sector_size, page->rpm); 1386 1387 floppy->flexible_disk_page = *page; 1388 drive->bios_cyl = page->cyls; 1389 drive->bios_head = page->heads; 1390 drive->bios_sect = page->sectors; 1391 lba_capacity = floppy->blocks * floppy->block_size; 1392 if (capacity < lba_capacity) { 1393 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 1394 "bytes, but the drive only handles %d\n", 1395 drive->name, lba_capacity, capacity); 1396 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; 1397 } 1398 return 0; 1399} 1400 1401static int idefloppy_get_capability_page(ide_drive_t *drive) 1402{ 1403 idefloppy_floppy_t *floppy = drive->driver_data; 1404 idefloppy_pc_t pc; 1405 idefloppy_mode_parameter_header_t *header; 1406 idefloppy_capabilities_page_t *page; 1407 1408 floppy->srfp = 0; 1409 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 1410 MODE_SENSE_CURRENT); 1411 1412 set_bit(PC_SUPPRESS_ERROR, &pc.flags); 1413 if (idefloppy_queue_pc_tail(drive,&pc)) { 1414 return 1; 1415 } 1416 1417 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1418 page= (idefloppy_capabilities_page_t *)(header+1); 1419 floppy->srfp = page->srfp; 1420 return (0); 1421} 1422 1423/* 1424 * Determine if a media is present in the floppy drive, and if so, 1425 * its LBA capacity. 1426 */ 1427static int idefloppy_get_capacity (ide_drive_t *drive) 1428{ 1429 idefloppy_floppy_t *floppy = drive->driver_data; 1430 idefloppy_pc_t pc; 1431 idefloppy_capacity_header_t *header; 1432 idefloppy_capacity_descriptor_t *descriptor; 1433 int i, descriptors, rc = 1, blocks, length; 1434 1435 drive->bios_cyl = 0; 1436 drive->bios_head = drive->bios_sect = 0; 1437 floppy->blocks = floppy->bs_factor = 0; 1438 set_capacity(floppy->disk, 0); 1439 1440 idefloppy_create_read_capacity_cmd(&pc); 1441 if (idefloppy_queue_pc_tail(drive, &pc)) { 1442 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1443 return 1; 1444 } 1445 header = (idefloppy_capacity_header_t *) pc.buffer; 1446 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); 1447 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1448 1449 for (i = 0; i < descriptors; i++, descriptor++) { 1450 blocks = descriptor->blocks = ntohl(descriptor->blocks); 1451 length = descriptor->length = ntohs(descriptor->length); 1452 1453 if (!i) 1454 { 1455 switch (descriptor->dc) { 1456 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1457 case CAPACITY_UNFORMATTED: 1458 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) 1459 /* 1460 * If it is not a clik drive, break out 1461 * (maintains previous driver behaviour) 1462 */ 1463 break; 1464 case CAPACITY_CURRENT: 1465 /* Normal Zip/LS-120 disks */ 1466 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) 1467 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1468 "sector size\n", drive->name, 1469 blocks * length / 1024, blocks, length); 1470 floppy->capacity = *descriptor; 1471 if (!length || length % 512) { 1472 printk(KERN_NOTICE "%s: %d bytes block size " 1473 "not supported\n", drive->name, length); 1474 } else { 1475 floppy->blocks = blocks; 1476 floppy->block_size = length; 1477 if ((floppy->bs_factor = length / 512) != 1) 1478 printk(KERN_NOTICE "%s: warning: non " 1479 "512 bytes block size not " 1480 "fully supported\n", 1481 drive->name); 1482 rc = 0; 1483 } 1484 break; 1485 case CAPACITY_NO_CARTRIDGE: 1486 /* 1487 * This is a KERN_ERR so it appears on screen 1488 * for the user to see 1489 */ 1490 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1491 break; 1492 case CAPACITY_INVALID: 1493 printk(KERN_ERR "%s: Invalid capacity for disk " 1494 "in drive\n", drive->name); 1495 break; 1496 } 1497 } 1498 if (!i) { 1499 debug_log( "Descriptor 0 Code: %d\n", 1500 descriptor->dc); 1501 } 1502 debug_log( "Descriptor %d: %dkB, %d blocks, %d " 1503 "sector size\n", i, blocks * length / 1024, blocks, 1504 length); 1505 } 1506 1507 /* Clik! disk does not support get_flexible_disk_page */ 1508 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1509 (void) idefloppy_get_flexible_disk_page(drive); 1510 } 1511 1512 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1513 return rc; 1514} 1515 1516/* 1517** Obtain the list of formattable capacities. 1518** Very similar to idefloppy_get_capacity, except that we push the capacity 1519** descriptors to userland, instead of our own structures. 1520** 1521** Userland gives us the following structure: 1522** 1523** struct idefloppy_format_capacities { 1524** int nformats; 1525** struct { 1526** int nblocks; 1527** int blocksize; 1528** } formats[]; 1529** } ; 1530** 1531** userland initializes nformats to the number of allocated formats[] 1532** records. On exit we set nformats to the number of records we've 1533** actually initialized. 1534** 1535*/ 1536 1537static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1538{ 1539 idefloppy_pc_t pc; 1540 idefloppy_capacity_header_t *header; 1541 idefloppy_capacity_descriptor_t *descriptor; 1542 int i, descriptors, blocks, length; 1543 int u_array_size; 1544 int u_index; 1545 int __user *argp; 1546 1547 if (get_user(u_array_size, arg)) 1548 return (-EFAULT); 1549 1550 if (u_array_size <= 0) 1551 return (-EINVAL); 1552 1553 idefloppy_create_read_capacity_cmd(&pc); 1554 if (idefloppy_queue_pc_tail(drive, &pc)) { 1555 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1556 return (-EIO); 1557 } 1558 header = (idefloppy_capacity_header_t *) pc.buffer; 1559 descriptors = header->length / 1560 sizeof(idefloppy_capacity_descriptor_t); 1561 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1562 1563 u_index = 0; 1564 argp = arg + 1; 1565 1566 /* 1567 ** We always skip the first capacity descriptor. That's the 1568 ** current capacity. We are interested in the remaining descriptors, 1569 ** the formattable capacities. 1570 */ 1571 1572 for (i=0; i<descriptors; i++, descriptor++) { 1573 if (u_index >= u_array_size) 1574 break; /* User-supplied buffer too small */ 1575 if (i == 0) 1576 continue; /* Skip the first descriptor */ 1577 1578 blocks = ntohl(descriptor->blocks); 1579 length = ntohs(descriptor->length); 1580 1581 if (put_user(blocks, argp)) 1582 return(-EFAULT); 1583 ++argp; 1584 1585 if (put_user(length, argp)) 1586 return (-EFAULT); 1587 ++argp; 1588 1589 ++u_index; 1590 } 1591 1592 if (put_user(u_index, arg)) 1593 return (-EFAULT); 1594 return (0); 1595} 1596 1597/* 1598** Send ATAPI_FORMAT_UNIT to the drive. 1599** 1600** Userland gives us the following structure: 1601** 1602** struct idefloppy_format_command { 1603** int nblocks; 1604** int blocksize; 1605** int flags; 1606** } ; 1607** 1608** flags is a bitmask, currently, the only defined flag is: 1609** 1610** 0x01 - verify media after format. 1611*/ 1612 1613static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg) 1614{ 1615 int blocks; 1616 int length; 1617 int flags; 1618 idefloppy_pc_t pc; 1619 1620 if (get_user(blocks, arg) || 1621 get_user(length, arg+1) || 1622 get_user(flags, arg+2)) { 1623 return (-EFAULT); 1624 } 1625 1626 /* Get the SFRP bit */ 1627 (void) idefloppy_get_capability_page(drive); 1628 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1629 if (idefloppy_queue_pc_tail(drive, &pc)) { 1630 return (-EIO); 1631 } 1632 1633 return (0); 1634} 1635 1636/* 1637** Get ATAPI_FORMAT_UNIT progress indication. 1638** 1639** Userland gives a pointer to an int. The int is set to a progresss 1640** indicator 0-65536, with 65536=100%. 1641** 1642** If the drive does not support format progress indication, we just check 1643** the dsc bit, and return either 0 or 65536. 1644*/ 1645 1646static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1647{ 1648 idefloppy_floppy_t *floppy = drive->driver_data; 1649 idefloppy_pc_t pc; 1650 int progress_indication = 0x10000; 1651 1652 if (floppy->srfp) { 1653 idefloppy_create_request_sense_cmd(&pc); 1654 if (idefloppy_queue_pc_tail(drive, &pc)) { 1655 return (-EIO); 1656 } 1657 1658 if (floppy->sense_key == 2 && 1659 floppy->asc == 4 && 1660 floppy->ascq == 4) { 1661 progress_indication = floppy->progress_indication; 1662 } 1663 /* Else assume format_unit has finished, and we're 1664 ** at 0x10000 */ 1665 } else { 1666 atapi_status_t status; 1667 unsigned long flags; 1668 1669 local_irq_save(flags); 1670 status.all = HWIF(drive)->INB(IDE_STATUS_REG); 1671 local_irq_restore(flags); 1672 1673 progress_indication = !status.b.dsc ? 0 : 0x10000; 1674 } 1675 if (put_user(progress_indication, arg)) 1676 return (-EFAULT); 1677 1678 return (0); 1679} 1680 1681/* 1682 * Return the current floppy capacity. 1683 */ 1684static sector_t idefloppy_capacity (ide_drive_t *drive) 1685{ 1686 idefloppy_floppy_t *floppy = drive->driver_data; 1687 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1688 1689 return capacity; 1690} 1691 1692/* 1693 * idefloppy_identify_device checks if we can support a drive, 1694 * based on the ATAPI IDENTIFY command results. 1695 */ 1696static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) 1697{ 1698 struct idefloppy_id_gcw gcw; 1699#if IDEFLOPPY_DEBUG_INFO 1700 u16 mask,i; 1701 char buffer[80]; 1702#endif /* IDEFLOPPY_DEBUG_INFO */ 1703 1704 *((u16 *) &gcw) = id->config; 1705 1706#ifdef CONFIG_PPC 1707 /* kludge for Apple PowerBook internal zip */ 1708 if ((gcw.device_type == 5) && 1709 !strstr(id->model, "CD-ROM") && 1710 strstr(id->model, "ZIP")) 1711 gcw.device_type = 0; 1712#endif 1713 1714#if IDEFLOPPY_DEBUG_INFO 1715 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); 1716 switch (gcw.protocol) { 1717 case 0: case 1: sprintf(buffer, "ATA");break; 1718 case 2: sprintf(buffer, "ATAPI");break; 1719 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; 1720 } 1721 printk(KERN_INFO "Protocol Type: %s\n", buffer); 1722 switch (gcw.device_type) { 1723 case 0: sprintf(buffer, "Direct-access Device");break; 1724 case 1: sprintf(buffer, "Streaming Tape Device");break; 1725 case 2: case 3: case 4: sprintf (buffer, "Reserved");break; 1726 case 5: sprintf(buffer, "CD-ROM Device");break; 1727 case 6: sprintf(buffer, "Reserved"); 1728 case 7: sprintf(buffer, "Optical memory Device");break; 1729 case 0x1f: sprintf(buffer, "Unknown or no Device type");break; 1730 default: sprintf(buffer, "Reserved"); 1731 } 1732 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); 1733 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 1734 switch (gcw.drq_type) { 1735 case 0: sprintf(buffer, "Microprocessor DRQ");break; 1736 case 1: sprintf(buffer, "Interrupt DRQ");break; 1737 case 2: sprintf(buffer, "Accelerated DRQ");break; 1738 case 3: sprintf(buffer, "Reserved");break; 1739 } 1740 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); 1741 switch (gcw.packet_size) { 1742 case 0: sprintf(buffer, "12 bytes");break; 1743 case 1: sprintf(buffer, "16 bytes");break; 1744 default: sprintf(buffer, "Reserved");break; 1745 } 1746 printk(KERN_INFO "Command Packet Size: %s\n", buffer); 1747 printk(KERN_INFO "Model: %.40s\n",id->model); 1748 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev); 1749 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no); 1750 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512); 1751 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n"); 1752 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n"); 1753 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n"); 1754 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n"); 1755 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n"); 1756 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO); 1757 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA); 1758 printk(KERN_INFO "Single Word DMA supported modes:\n"); 1759 for (i=0,mask=1;i<8;i++,mask=mask << 1) { 1760 if (id->dma_1word & mask) 1761 printk(KERN_INFO " Mode %d%s\n", i, 1762 (id->dma_1word & (mask << 8)) ? " (active)" : ""); 1763 } 1764 printk(KERN_INFO "Multi Word DMA supported modes:\n"); 1765 for (i=0,mask=1;i<8;i++,mask=mask << 1) { 1766 if (id->dma_mword & mask) 1767 printk(KERN_INFO " Mode %d%s\n", i, 1768 (id->dma_mword & (mask << 8)) ? " (active)" : ""); 1769 } 1770 if (id->field_valid & 0x0002) { 1771 printk(KERN_INFO "Enhanced PIO Modes: %s\n", 1772 id->eide_pio_modes & 1 ? "Mode 3":"None"); 1773 if (id->eide_dma_min == 0) 1774 sprintf(buffer, "Not supported"); 1775 else 1776 sprintf(buffer, "%d ns",id->eide_dma_min); 1777 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer); 1778 if (id->eide_dma_time == 0) 1779 sprintf(buffer, "Not supported"); 1780 else 1781 sprintf(buffer, "%d ns",id->eide_dma_time); 1782 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer); 1783 if (id->eide_pio == 0) 1784 sprintf(buffer, "Not supported"); 1785 else 1786 sprintf(buffer, "%d ns",id->eide_pio); 1787 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n", 1788 buffer); 1789 if (id->eide_pio_iordy == 0) 1790 sprintf(buffer, "Not supported"); 1791 else 1792 sprintf(buffer, "%d ns",id->eide_pio_iordy); 1793 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer); 1794 } else 1795 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n"); 1796#endif /* IDEFLOPPY_DEBUG_INFO */ 1797 1798 if (gcw.protocol != 2) 1799 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); 1800 else if (gcw.device_type != 0) 1801 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); 1802 else if (!gcw.removable) 1803 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1804 else if (gcw.drq_type == 3) { 1805 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); 1806 } else if (gcw.packet_size != 0) { 1807 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); 1808 } else 1809 return 1; 1810 return 0; 1811} 1812 1813static void idefloppy_add_settings(ide_drive_t *drive) 1814{ 1815 idefloppy_floppy_t *floppy = drive->driver_data; 1816 1817/* 1818 * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function 1819 */ 1820 ide_add_setting(drive, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); 1821 ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); 1822 ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); 1823 ide_add_setting(drive, "ticks", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); 1824} 1825 1826/* 1827 * Driver initialization. 1828 */ 1829static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) 1830{ 1831 struct idefloppy_id_gcw gcw; 1832 1833 *((u16 *) &gcw) = drive->id->config; 1834 floppy->pc = floppy->pc_stack; 1835 if (gcw.drq_type == 1) 1836 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); 1837 /* 1838 * We used to check revisions here. At this point however 1839 * I'm giving up. Just assume they are all broken, its easier. 1840 * 1841 * The actual reason for the workarounds was likely 1842 * a driver bug after all rather than a firmware bug, 1843 * and the workaround below used to hide it. It should 1844 * be fixed as of version 1.9, but to be on the safe side 1845 * we'll leave the limitation below for the 2.2.x tree. 1846 */ 1847 1848 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1849 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); 1850 /* This value will be visible in the /proc/ide/hdx/settings */ 1851 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1852 blk_queue_max_sectors(drive->queue, 64); 1853 } 1854 1855 /* 1856 * Guess what? The IOMEGA Clik! drive also needs the 1857 * above fix. It makes nasty clicking noises without 1858 * it, so please don't remove this. 1859 */ 1860 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1861 blk_queue_max_sectors(drive->queue, 64); 1862 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); 1863 } 1864 1865 1866 (void) idefloppy_get_capacity(drive); 1867 idefloppy_add_settings(drive); 1868} 1869 1870static void ide_floppy_remove(ide_drive_t *drive) 1871{ 1872 idefloppy_floppy_t *floppy = drive->driver_data; 1873 struct gendisk *g = floppy->disk; 1874 1875 ide_unregister_subdriver(drive, floppy->driver); 1876 1877 del_gendisk(g); 1878 1879 ide_floppy_put(floppy); 1880} 1881 1882static void ide_floppy_release(struct kref *kref) 1883{ 1884 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1885 ide_drive_t *drive = floppy->drive; 1886 struct gendisk *g = floppy->disk; 1887 1888 drive->driver_data = NULL; 1889 g->private_data = NULL; 1890 put_disk(g); 1891 kfree(floppy); 1892} 1893 1894#ifdef CONFIG_PROC_FS 1895 1896static int proc_idefloppy_read_capacity 1897 (char *page, char **start, off_t off, int count, int *eof, void *data) 1898{ 1899 ide_drive_t*drive = (ide_drive_t *)data; 1900 int len; 1901 1902 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); 1903 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 1904} 1905 1906static ide_proc_entry_t idefloppy_proc[] = { 1907 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1908 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1909 { NULL, 0, NULL, NULL } 1910}; 1911 1912#else 1913 1914#define idefloppy_proc NULL 1915 1916#endif /* CONFIG_PROC_FS */ 1917 1918static int ide_floppy_probe(ide_drive_t *); 1919 1920static ide_driver_t idefloppy_driver = { 1921 .gen_driver = { 1922 .owner = THIS_MODULE, 1923 .name = "ide-floppy", 1924 .bus = &ide_bus_type, 1925 }, 1926 .probe = ide_floppy_probe, 1927 .remove = ide_floppy_remove, 1928 .version = IDEFLOPPY_VERSION, 1929 .media = ide_floppy, 1930 .supports_dsc_overlap = 0, 1931 .do_request = idefloppy_do_request, 1932 .end_request = idefloppy_do_end_request, 1933 .error = __ide_error, 1934 .abort = __ide_abort, 1935 .proc = idefloppy_proc, 1936}; 1937 1938static int idefloppy_open(struct inode *inode, struct file *filp) 1939{ 1940 struct gendisk *disk = inode->i_bdev->bd_disk; 1941 struct ide_floppy_obj *floppy; 1942 ide_drive_t *drive; 1943 idefloppy_pc_t pc; 1944 int ret = 0; 1945 1946 debug_log(KERN_INFO "Reached idefloppy_open\n"); 1947 1948 if (!(floppy = ide_floppy_get(disk))) 1949 return -ENXIO; 1950 1951 drive = floppy->drive; 1952 1953 drive->usage++; 1954 1955 if (drive->usage == 1) { 1956 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1957 /* Just in case */ 1958 1959 idefloppy_create_test_unit_ready_cmd(&pc); 1960 if (idefloppy_queue_pc_tail(drive, &pc)) { 1961 idefloppy_create_start_stop_cmd(&pc, 1); 1962 (void) idefloppy_queue_pc_tail(drive, &pc); 1963 } 1964 1965 if (idefloppy_get_capacity (drive) 1966 && (filp->f_flags & O_NDELAY) == 0 1967 /* 1968 ** Allow O_NDELAY to open a drive without a disk, or with 1969 ** an unreadable disk, so that we can get the format 1970 ** capacity of the drive or begin the format - Sam 1971 */ 1972 ) { 1973 drive->usage--; 1974 ret = -EIO; 1975 goto out_put_floppy; 1976 } 1977 1978 if (floppy->wp && (filp->f_mode & 2)) { 1979 drive->usage--; 1980 ret = -EROFS; 1981 goto out_put_floppy; 1982 } 1983 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1984 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1985 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1986 idefloppy_create_prevent_cmd(&pc, 1); 1987 (void) idefloppy_queue_pc_tail(drive, &pc); 1988 } 1989 check_disk_change(inode->i_bdev); 1990 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { 1991 drive->usage--; 1992 ret = -EBUSY; 1993 goto out_put_floppy; 1994 } 1995 return 0; 1996 1997out_put_floppy: 1998 ide_floppy_put(floppy); 1999 return ret; 2000} 2001 2002static int idefloppy_release(struct inode *inode, struct file *filp) 2003{ 2004 struct gendisk *disk = inode->i_bdev->bd_disk; 2005 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2006 ide_drive_t *drive = floppy->drive; 2007 idefloppy_pc_t pc; 2008 2009 debug_log(KERN_INFO "Reached idefloppy_release\n"); 2010 2011 if (drive->usage == 1) { 2012 /* IOMEGA Clik! drives do not support lock/unlock commands */ 2013 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 2014 idefloppy_create_prevent_cmd(&pc, 0); 2015 (void) idefloppy_queue_pc_tail(drive, &pc); 2016 } 2017 2018 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2019 } 2020 drive->usage--; 2021 2022 ide_floppy_put(floppy); 2023 2024 return 0; 2025} 2026 2027static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 2028{ 2029 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 2030 ide_drive_t *drive = floppy->drive; 2031 2032 geo->heads = drive->bios_head; 2033 geo->sectors = drive->bios_sect; 2034 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 2035 return 0; 2036} 2037 2038static int idefloppy_ioctl(struct inode *inode, struct file *file, 2039 unsigned int cmd, unsigned long arg) 2040{ 2041 struct block_device *bdev = inode->i_bdev; 2042 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 2043 ide_drive_t *drive = floppy->drive; 2044 void __user *argp = (void __user *)arg; 2045 int err; 2046 int prevent = (arg) ? 1 : 0; 2047 idefloppy_pc_t pc; 2048 2049 switch (cmd) { 2050 case CDROMEJECT: 2051 prevent = 0; 2052 /* fall through */ 2053 case CDROM_LOCKDOOR: 2054 if (drive->usage > 1) 2055 return -EBUSY; 2056 2057 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */ 2058 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 2059 idefloppy_create_prevent_cmd(&pc, prevent); 2060 (void) idefloppy_queue_pc_tail(drive, &pc); 2061 } 2062 if (cmd == CDROMEJECT) { 2063 idefloppy_create_start_stop_cmd(&pc, 2); 2064 (void) idefloppy_queue_pc_tail(drive, &pc); 2065 } 2066 return 0; 2067 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 2068 return 0; 2069 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 2070 return idefloppy_get_format_capacities(drive, argp); 2071 case IDEFLOPPY_IOCTL_FORMAT_START: 2072 2073 if (!(file->f_mode & 2)) 2074 return -EPERM; 2075 2076 if (drive->usage > 1) { 2077 /* Don't format if someone is using the disk */ 2078 2079 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, 2080 &floppy->flags); 2081 return -EBUSY; 2082 } 2083 2084 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2085 2086 err = idefloppy_begin_format(drive, argp); 2087 if (err) 2088 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2089 return err; 2090 /* 2091 ** Note, the bit will be cleared when the device is 2092 ** closed. This is the cleanest way to handle the 2093 ** situation where the drive does not support 2094 ** format progress reporting. 2095 */ 2096 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 2097 return idefloppy_get_format_progress(drive, argp); 2098 } 2099 return generic_ide_ioctl(drive, file, bdev, cmd, arg); 2100} 2101 2102static int idefloppy_media_changed(struct gendisk *disk) 2103{ 2104 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2105 ide_drive_t *drive = floppy->drive; 2106 2107 /* do not scan partitions twice if this is a removable device */ 2108 if (drive->attach) { 2109 drive->attach = 0; 2110 return 0; 2111 } 2112 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 2113} 2114 2115static int idefloppy_revalidate_disk(struct gendisk *disk) 2116{ 2117 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2118 set_capacity(disk, idefloppy_capacity(floppy->drive)); 2119 return 0; 2120} 2121 2122static struct block_device_operations idefloppy_ops = { 2123 .owner = THIS_MODULE, 2124 .open = idefloppy_open, 2125 .release = idefloppy_release, 2126 .ioctl = idefloppy_ioctl, 2127 .getgeo = idefloppy_getgeo, 2128 .media_changed = idefloppy_media_changed, 2129 .revalidate_disk= idefloppy_revalidate_disk 2130}; 2131 2132static int ide_floppy_probe(ide_drive_t *drive) 2133{ 2134 idefloppy_floppy_t *floppy; 2135 struct gendisk *g; 2136 2137 if (!strstr("ide-floppy", drive->driver_req)) 2138 goto failed; 2139 if (!drive->present) 2140 goto failed; 2141 if (drive->media != ide_floppy) 2142 goto failed; 2143 if (!idefloppy_identify_device (drive, drive->id)) { 2144 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); 2145 goto failed; 2146 } 2147 if (drive->scsi) { 2148 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); 2149 goto failed; 2150 } 2151 if ((floppy = (idefloppy_floppy_t *) kzalloc (sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { 2152 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); 2153 goto failed; 2154 } 2155 2156 g = alloc_disk(1 << PARTN_BITS); 2157 if (!g) 2158 goto out_free_floppy; 2159 2160 ide_init_disk(g, drive); 2161 2162 ide_register_subdriver(drive, &idefloppy_driver); 2163 2164 kref_init(&floppy->kref); 2165 2166 floppy->drive = drive; 2167 floppy->driver = &idefloppy_driver; 2168 floppy->disk = g; 2169 2170 g->private_data = &floppy->driver; 2171 2172 drive->driver_data = floppy; 2173 2174 idefloppy_setup (drive, floppy); 2175 2176 g->minors = 1 << PARTN_BITS; 2177 g->driverfs_dev = &drive->gendev; 2178 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 2179 g->fops = &idefloppy_ops; 2180 drive->attach = 1; 2181 add_disk(g); 2182 return 0; 2183 2184out_free_floppy: 2185 kfree(floppy); 2186failed: 2187 return -ENODEV; 2188} 2189 2190MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 2191 2192static void __exit idefloppy_exit (void) 2193{ 2194 driver_unregister(&idefloppy_driver.gen_driver); 2195} 2196 2197static int __init idefloppy_init(void) 2198{ 2199 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 2200 return driver_register(&idefloppy_driver.gen_driver); 2201} 2202 2203MODULE_ALIAS("ide:*m-floppy*"); 2204module_init(idefloppy_init); 2205module_exit(idefloppy_exit); 2206MODULE_LICENSE("GPL"); 2207