1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * drivers/block/ataflop.c 4 * 5 * Copyright (C) 1993 Greg Harp 6 * Atari Support by Bjoern Brauel, Roman Hodek 7 * 8 * Big cleanup Sep 11..14 1994 Roman Hodek: 9 * - Driver now works interrupt driven 10 * - Support for two drives; should work, but I cannot test that :-( 11 * - Reading is done in whole tracks and buffered to speed up things 12 * - Disk change detection and drive deselecting after motor-off 13 * similar to TOS 14 * - Autodetection of disk format (DD/HD); untested yet, because I 15 * don't have an HD drive :-( 16 * 17 * Fixes Nov 13 1994 Martin Schaller: 18 * - Autodetection works now 19 * - Support for 5 1/4'' disks 20 * - Removed drive type (unknown on atari) 21 * - Do seeks with 8 Mhz 22 * 23 * Changes by Andreas Schwab: 24 * - After errors in multiple read mode try again reading single sectors 25 * (Feb 1995): 26 * - Clean up error handling 27 * - Set blk_size for proper size checking 28 * - Initialize track register when testing presence of floppy 29 * - Implement some ioctl's 30 * 31 * Changes by Torsten Lang: 32 * - When probing the floppies we should add the FDCCMDADD_H flag since 33 * the FDC will otherwise wait forever when no disk is inserted... 34 * 35 * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa: 36 * - MFPDELAY() after each FDC access -> atari 37 * - more/other disk formats 38 * - DMA to the block buffer directly if we have a 32bit DMA 39 * - for medusa, the step rate is always 3ms 40 * - on medusa, use only cache_push() 41 * Roman: 42 * - Make disk format numbering independent from minors 43 * - Let user set max. supported drive type (speeds up format 44 * detection, saves buffer space) 45 * 46 * Roman 10/15/95: 47 * - implement some more ioctls 48 * - disk formatting 49 * 50 * Andreas 95/12/12: 51 * - increase gap size at start of track for HD/ED disks 52 * 53 * Michael (MSch) 11/07/96: 54 * - implemented FDSETPRM and FDDEFPRM ioctl 55 * 56 * Andreas (97/03/19): 57 * - implemented missing BLK* ioctls 58 * 59 * Things left to do: 60 * - Formatting 61 * - Maybe a better strategy for disk change detection (does anyone 62 * know one?) 63 */ 64 65 #include <linux/module.h> 66 67 #include <linux/fd.h> 68 #include <linux/delay.h> 69 #include <linux/init.h> 70 #include <linux/blk-mq.h> 71 #include <linux/mutex.h> 72 #include <linux/completion.h> 73 #include <linux/wait.h> 74 75 #include <asm/atariints.h> 76 #include <asm/atari_stdma.h> 77 #include <asm/atari_stram.h> 78 79 #define FD_MAX_UNITS 2 80 81 #undef DEBUG 82 83 static DEFINE_MUTEX(ataflop_mutex); 84 static struct request *fd_request; 85 86 /* 87 * WD1772 stuff 88 */ 89 90 /* register codes */ 91 92 #define FDCSELREG_STP (0x80) /* command/status register */ 93 #define FDCSELREG_TRA (0x82) /* track register */ 94 #define FDCSELREG_SEC (0x84) /* sector register */ 95 #define FDCSELREG_DTA (0x86) /* data register */ 96 97 /* register names for FDC_READ/WRITE macros */ 98 99 #define FDCREG_CMD 0 100 #define FDCREG_STATUS 0 101 #define FDCREG_TRACK 2 102 #define FDCREG_SECTOR 4 103 #define FDCREG_DATA 6 104 105 /* command opcodes */ 106 107 #define FDCCMD_RESTORE (0x00) /* - */ 108 #define FDCCMD_SEEK (0x10) /* | */ 109 #define FDCCMD_STEP (0x20) /* | TYP 1 Commands */ 110 #define FDCCMD_STIN (0x40) /* | */ 111 #define FDCCMD_STOT (0x60) /* - */ 112 #define FDCCMD_RDSEC (0x80) /* - TYP 2 Commands */ 113 #define FDCCMD_WRSEC (0xa0) /* - " */ 114 #define FDCCMD_RDADR (0xc0) /* - */ 115 #define FDCCMD_RDTRA (0xe0) /* | TYP 3 Commands */ 116 #define FDCCMD_WRTRA (0xf0) /* - */ 117 #define FDCCMD_FORCI (0xd0) /* - TYP 4 Command */ 118 119 /* command modifier bits */ 120 121 #define FDCCMDADD_SR6 (0x00) /* step rate settings */ 122 #define FDCCMDADD_SR12 (0x01) 123 #define FDCCMDADD_SR2 (0x02) 124 #define FDCCMDADD_SR3 (0x03) 125 #define FDCCMDADD_V (0x04) /* verify */ 126 #define FDCCMDADD_H (0x08) /* wait for spin-up */ 127 #define FDCCMDADD_U (0x10) /* update track register */ 128 #define FDCCMDADD_M (0x10) /* multiple sector access */ 129 #define FDCCMDADD_E (0x04) /* head settling flag */ 130 #define FDCCMDADD_P (0x02) /* precompensation off */ 131 #define FDCCMDADD_A0 (0x01) /* DAM flag */ 132 133 /* status register bits */ 134 135 #define FDCSTAT_MOTORON (0x80) /* motor on */ 136 #define FDCSTAT_WPROT (0x40) /* write protected (FDCCMD_WR*) */ 137 #define FDCSTAT_SPINUP (0x20) /* motor speed stable (Type I) */ 138 #define FDCSTAT_DELDAM (0x20) /* sector has deleted DAM (Type II+III) */ 139 #define FDCSTAT_RECNF (0x10) /* record not found */ 140 #define FDCSTAT_CRC (0x08) /* CRC error */ 141 #define FDCSTAT_TR00 (0x04) /* Track 00 flag (Type I) */ 142 #define FDCSTAT_LOST (0x04) /* Lost Data (Type II+III) */ 143 #define FDCSTAT_IDX (0x02) /* Index status (Type I) */ 144 #define FDCSTAT_DRQ (0x02) /* DRQ status (Type II+III) */ 145 #define FDCSTAT_BUSY (0x01) /* FDC is busy */ 146 147 148 /* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1 1 -> Side 2 */ 149 #define DSKSIDE (0x01) 150 151 #define DSKDRVNONE (0x06) 152 #define DSKDRV0 (0x02) 153 #define DSKDRV1 (0x04) 154 155 /* step rates */ 156 #define FDCSTEP_6 0x00 157 #define FDCSTEP_12 0x01 158 #define FDCSTEP_2 0x02 159 #define FDCSTEP_3 0x03 160 161 struct atari_format_descr { 162 int track; /* to be formatted */ 163 int head; /* "" "" */ 164 int sect_offset; /* offset of first sector */ 165 }; 166 167 /* Disk types: DD, HD, ED */ 168 static struct atari_disk_type { 169 const char *name; 170 unsigned spt; /* sectors per track */ 171 unsigned blocks; /* total number of blocks */ 172 unsigned fdc_speed; /* fdc_speed setting */ 173 unsigned stretch; /* track doubling ? */ 174 } atari_disk_type[] = { 175 { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */ 176 { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */ 177 { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */ 178 { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */ 179 /* formats above are probed for type DD */ 180 #define MAX_TYPE_DD 3 181 { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */ 182 { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */ 183 { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */ 184 /* formats above are probed for types DD and HD */ 185 #define MAX_TYPE_HD 6 186 { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */ 187 { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */ 188 /* formats above are probed for types DD, HD and ED */ 189 #define MAX_TYPE_ED 8 190 /* types below are never autoprobed */ 191 { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */ 192 { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */ 193 { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */ 194 { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */ 195 { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */ 196 { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */ 197 { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */ 198 { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */ 199 { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */ 200 { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */ 201 { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */ 202 { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */ 203 { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */ 204 { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */ 205 { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */ 206 { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */ 207 { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */ 208 { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */ 209 { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */ 210 }; 211 212 static int StartDiskType[] = { 213 MAX_TYPE_DD, 214 MAX_TYPE_HD, 215 MAX_TYPE_ED 216 }; 217 218 #define TYPE_DD 0 219 #define TYPE_HD 1 220 #define TYPE_ED 2 221 222 static int DriveType = TYPE_HD; 223 224 static DEFINE_SPINLOCK(ataflop_lock); 225 226 /* Array for translating minors into disk formats */ 227 static struct { 228 int index; 229 unsigned drive_types; 230 } minor2disktype[] = { 231 { 0, TYPE_DD }, /* 1: d360 */ 232 { 4, TYPE_HD }, /* 2: h1200 */ 233 { 1, TYPE_DD }, /* 3: D360 */ 234 { 2, TYPE_DD }, /* 4: D720 */ 235 { 1, TYPE_DD }, /* 5: h360 = D360 */ 236 { 2, TYPE_DD }, /* 6: h720 = D720 */ 237 { 5, TYPE_HD }, /* 7: H1440 */ 238 { 7, TYPE_ED }, /* 8: E2880 */ 239 /* some PC formats :-) */ 240 { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */ 241 { 5, TYPE_HD }, /* 10: h1440 = H1440 */ 242 { 9, TYPE_HD }, /* 11: H1680 */ 243 { 10, TYPE_DD }, /* 12: h410 */ 244 { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */ 245 { 11, TYPE_HD }, /* 14: h1476 */ 246 { 12, TYPE_HD }, /* 15: H1722 */ 247 { 13, TYPE_DD }, /* 16: h420 */ 248 { 14, TYPE_DD }, /* 17: H830 */ 249 { 15, TYPE_HD }, /* 18: h1494 */ 250 { 16, TYPE_HD }, /* 19: H1743 */ 251 { 17, TYPE_DD }, /* 20: h880 */ 252 { 18, TYPE_DD }, /* 21: D1040 */ 253 { 19, TYPE_DD }, /* 22: D1120 */ 254 { 20, TYPE_HD }, /* 23: h1600 */ 255 { 21, TYPE_HD }, /* 24: H1760 */ 256 { 22, TYPE_HD }, /* 25: H1920 */ 257 { 23, TYPE_ED }, /* 26: E3200 */ 258 { 24, TYPE_ED }, /* 27: E3520 */ 259 { 25, TYPE_ED }, /* 28: E3840 */ 260 { 26, TYPE_HD }, /* 29: H1840 */ 261 { 27, TYPE_DD }, /* 30: D800 */ 262 { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */ 263 }; 264 265 #define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype) 266 267 /* 268 * Maximum disk size (in kilobytes). This default is used whenever the 269 * current disk size is unknown. 270 */ 271 #define MAX_DISK_SIZE 3280 272 273 /* 274 * MSch: User-provided type information. 'drive' points to 275 * the respective entry of this array. Set by FDSETPRM ioctls. 276 */ 277 static struct atari_disk_type user_params[FD_MAX_UNITS]; 278 279 /* 280 * User-provided permanent type information. 'drive' points to 281 * the respective entry of this array. Set by FDDEFPRM ioctls, 282 * restored upon disk change by floppy_revalidate() if valid (as seen by 283 * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?) 284 */ 285 static struct atari_disk_type default_params[FD_MAX_UNITS]; 286 287 /* current info on each unit */ 288 static struct atari_floppy_struct { 289 int connected; /* !=0 : drive is connected */ 290 int autoprobe; /* !=0 : do autoprobe */ 291 292 struct atari_disk_type *disktype; /* current type of disk */ 293 294 int track; /* current head position or -1 if 295 unknown */ 296 unsigned int steprate; /* steprate setting */ 297 unsigned int wpstat; /* current state of WP signal (for 298 disk change detection) */ 299 int flags; /* flags */ 300 struct gendisk *disk[NUM_DISK_MINORS]; 301 int ref; 302 int type; 303 struct blk_mq_tag_set tag_set; 304 } unit[FD_MAX_UNITS]; 305 306 #define UD unit[drive] 307 #define UDT unit[drive].disktype 308 #define SUD unit[SelectedDrive] 309 #define SUDT unit[SelectedDrive].disktype 310 311 312 #define FDC_READ(reg) ({ \ 313 /* unsigned long __flags; */ \ 314 unsigned short __val; \ 315 /* local_irq_save(__flags); */ \ 316 dma_wd.dma_mode_status = 0x80 | (reg); \ 317 udelay(25); \ 318 __val = dma_wd.fdc_acces_seccount; \ 319 MFPDELAY(); \ 320 /* local_irq_restore(__flags); */ \ 321 __val & 0xff; \ 322 }) 323 324 #define FDC_WRITE(reg,val) \ 325 do { \ 326 /* unsigned long __flags; */ \ 327 /* local_irq_save(__flags); */ \ 328 dma_wd.dma_mode_status = 0x80 | (reg); \ 329 udelay(25); \ 330 dma_wd.fdc_acces_seccount = (val); \ 331 MFPDELAY(); \ 332 /* local_irq_restore(__flags); */ \ 333 } while(0) 334 335 336 /* Buffering variables: 337 * First, there is a DMA buffer in ST-RAM that is used for floppy DMA 338 * operations. Second, a track buffer is used to cache a whole track 339 * of the disk to save read operations. These are two separate buffers 340 * because that allows write operations without clearing the track buffer. 341 */ 342 343 static int MaxSectors[] = { 344 11, 22, 44 345 }; 346 static int BufferSize[] = { 347 15*512, 30*512, 60*512 348 }; 349 350 #define BUFFER_SIZE (BufferSize[DriveType]) 351 352 unsigned char *DMABuffer; /* buffer for writes */ 353 static unsigned long PhysDMABuffer; /* physical address */ 354 355 static int UseTrackbuffer = -1; /* Do track buffering? */ 356 module_param(UseTrackbuffer, int, 0); 357 358 unsigned char *TrackBuffer; /* buffer for reads */ 359 static unsigned long PhysTrackBuffer; /* physical address */ 360 static int BufferDrive, BufferSide, BufferTrack; 361 static int read_track; /* non-zero if we are reading whole tracks */ 362 363 #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512) 364 #define IS_BUFFERED(drive,side,track) \ 365 (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track)) 366 367 /* 368 * These are global variables, as that's the easiest way to give 369 * information to interrupts. They are the data used for the current 370 * request. 371 */ 372 static int SelectedDrive = 0; 373 static int ReqCmd, ReqBlock; 374 static int ReqSide, ReqTrack, ReqSector, ReqCnt; 375 static int HeadSettleFlag = 0; 376 static unsigned char *ReqData, *ReqBuffer; 377 static int MotorOn = 0, MotorOffTrys; 378 static int IsFormatting = 0, FormatError; 379 380 static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; 381 module_param_array(UserSteprate, int, NULL, 0); 382 383 static DECLARE_COMPLETION(format_wait); 384 385 static unsigned long changed_floppies = 0xff, fake_change = 0; 386 #define CHECK_CHANGE_DELAY HZ/2 387 388 #define FD_MOTOR_OFF_DELAY (3*HZ) 389 #define FD_MOTOR_OFF_MAXTRY (10*20) 390 391 #define FLOPPY_TIMEOUT (6*HZ) 392 #define RECALIBRATE_ERRORS 4 /* After this many errors the drive 393 * will be recalibrated. */ 394 #define MAX_ERRORS 8 /* After this many errors the driver 395 * will give up. */ 396 397 398 /* 399 * The driver is trying to determine the correct media format 400 * while Probing is set. fd_rwsec_done() clears it after a 401 * successful access. 402 */ 403 static int Probing = 0; 404 405 /* This flag is set when a dummy seek is necessary to make the WP 406 * status bit accessible. 407 */ 408 static int NeedSeek = 0; 409 410 411 #ifdef DEBUG 412 #define DPRINT(a) printk a 413 #else 414 #define DPRINT(a) 415 #endif 416 417 /***************************** Prototypes *****************************/ 418 419 static void fd_select_side( int side ); 420 static void fd_select_drive( int drive ); 421 static void fd_deselect( void ); 422 static void fd_motor_off_timer(struct timer_list *unused); 423 static void check_change(struct timer_list *unused); 424 static irqreturn_t floppy_irq (int irq, void *dummy); 425 static void fd_error( void ); 426 static int do_format(int drive, int type, struct atari_format_descr *desc); 427 static void do_fd_action( int drive ); 428 static void fd_calibrate( void ); 429 static void fd_calibrate_done( int status ); 430 static void fd_seek( void ); 431 static void fd_seek_done( int status ); 432 static void fd_rwsec( void ); 433 static void fd_readtrack_check(struct timer_list *unused); 434 static void fd_rwsec_done( int status ); 435 static void fd_rwsec_done1(int status); 436 static void fd_writetrack( void ); 437 static void fd_writetrack_done( int status ); 438 static void fd_times_out(struct timer_list *unused); 439 static void finish_fdc( void ); 440 static void finish_fdc_done( int dummy ); 441 static void setup_req_params( int drive ); 442 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int 443 cmd, unsigned long param); 444 static void fd_probe( int drive ); 445 static int fd_test_drive_present( int drive ); 446 static void config_types( void ); 447 static int floppy_open(struct block_device *bdev, fmode_t mode); 448 static void floppy_release(struct gendisk *disk, fmode_t mode); 449 450 /************************* End of Prototypes **************************/ 451 452 static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer); 453 static DEFINE_TIMER(readtrack_timer, fd_readtrack_check); 454 static DEFINE_TIMER(timeout_timer, fd_times_out); 455 static DEFINE_TIMER(fd_timer, check_change); 456 457 static void fd_end_request_cur(blk_status_t err) 458 { 459 if (!blk_update_request(fd_request, err, 460 blk_rq_cur_bytes(fd_request))) { 461 __blk_mq_end_request(fd_request, err); 462 fd_request = NULL; 463 } 464 } 465 466 static inline void start_motor_off_timer(void) 467 { 468 mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY); 469 MotorOffTrys = 0; 470 } 471 472 static inline void start_check_change_timer( void ) 473 { 474 mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY); 475 } 476 477 static inline void start_timeout(void) 478 { 479 mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT); 480 } 481 482 static inline void stop_timeout(void) 483 { 484 del_timer(&timeout_timer); 485 } 486 487 /* Select the side to use. */ 488 489 static void fd_select_side( int side ) 490 { 491 unsigned long flags; 492 493 /* protect against various other ints mucking around with the PSG */ 494 local_irq_save(flags); 495 496 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ 497 sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 : 498 sound_ym.rd_data_reg_sel & 0xfe; 499 500 local_irq_restore(flags); 501 } 502 503 504 /* Select a drive, update the FDC's track register and set the correct 505 * clock speed for this disk's type. 506 */ 507 508 static void fd_select_drive( int drive ) 509 { 510 unsigned long flags; 511 unsigned char tmp; 512 513 if (drive == SelectedDrive) 514 return; 515 516 /* protect against various other ints mucking around with the PSG */ 517 local_irq_save(flags); 518 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ 519 tmp = sound_ym.rd_data_reg_sel; 520 sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1); 521 atari_dont_touch_floppy_select = 1; 522 local_irq_restore(flags); 523 524 /* restore track register to saved value */ 525 FDC_WRITE( FDCREG_TRACK, UD.track ); 526 udelay(25); 527 528 /* select 8/16 MHz */ 529 if (UDT) 530 if (ATARIHW_PRESENT(FDCSPEED)) 531 dma_wd.fdc_speed = UDT->fdc_speed; 532 533 SelectedDrive = drive; 534 } 535 536 537 /* Deselect both drives. */ 538 539 static void fd_deselect( void ) 540 { 541 unsigned long flags; 542 543 /* protect against various other ints mucking around with the PSG */ 544 local_irq_save(flags); 545 atari_dont_touch_floppy_select = 0; 546 sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */ 547 sound_ym.wd_data = (sound_ym.rd_data_reg_sel | 548 (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */ 549 /* On Falcon, the drive B select line is used on the printer port, so 550 * leave it alone... */ 551 SelectedDrive = -1; 552 local_irq_restore(flags); 553 } 554 555 556 /* This timer function deselects the drives when the FDC switched the 557 * motor off. The deselection cannot happen earlier because the FDC 558 * counts the index signals, which arrive only if one drive is selected. 559 */ 560 561 static void fd_motor_off_timer(struct timer_list *unused) 562 { 563 unsigned char status; 564 565 if (SelectedDrive < 0) 566 /* no drive selected, needn't deselect anyone */ 567 return; 568 569 if (stdma_islocked()) 570 goto retry; 571 572 status = FDC_READ( FDCREG_STATUS ); 573 574 if (!(status & 0x80)) { 575 /* motor already turned off by FDC -> deselect drives */ 576 MotorOn = 0; 577 fd_deselect(); 578 return; 579 } 580 /* not yet off, try again */ 581 582 retry: 583 /* Test again later; if tested too often, it seems there is no disk 584 * in the drive and the FDC will leave the motor on forever (or, 585 * at least until a disk is inserted). So we'll test only twice 586 * per second from then on... 587 */ 588 mod_timer(&motor_off_timer, 589 jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2)); 590 } 591 592 593 /* This function is repeatedly called to detect disk changes (as good 594 * as possible) and keep track of the current state of the write protection. 595 */ 596 597 static void check_change(struct timer_list *unused) 598 { 599 static int drive = 0; 600 601 unsigned long flags; 602 unsigned char old_porta; 603 int stat; 604 605 if (++drive > 1 || !UD.connected) 606 drive = 0; 607 608 /* protect against various other ints mucking around with the PSG */ 609 local_irq_save(flags); 610 611 if (!stdma_islocked()) { 612 sound_ym.rd_data_reg_sel = 14; 613 old_porta = sound_ym.rd_data_reg_sel; 614 sound_ym.wd_data = (old_porta | DSKDRVNONE) & 615 ~(drive == 0 ? DSKDRV0 : DSKDRV1); 616 stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT); 617 sound_ym.wd_data = old_porta; 618 619 if (stat != UD.wpstat) { 620 DPRINT(( "wpstat[%d] = %d\n", drive, stat )); 621 UD.wpstat = stat; 622 set_bit (drive, &changed_floppies); 623 } 624 } 625 local_irq_restore(flags); 626 627 start_check_change_timer(); 628 } 629 630 631 /* Handling of the Head Settling Flag: This flag should be set after each 632 * seek operation, because we don't use seeks with verify. 633 */ 634 635 static inline void set_head_settle_flag(void) 636 { 637 HeadSettleFlag = FDCCMDADD_E; 638 } 639 640 static inline int get_head_settle_flag(void) 641 { 642 int tmp = HeadSettleFlag; 643 HeadSettleFlag = 0; 644 return( tmp ); 645 } 646 647 static inline void copy_buffer(void *from, void *to) 648 { 649 ulong *p1 = (ulong *)from, *p2 = (ulong *)to; 650 int cnt; 651 652 for (cnt = 512/4; cnt; cnt--) 653 *p2++ = *p1++; 654 } 655 656 657 658 659 /* General Interrupt Handling */ 660 661 static void (*FloppyIRQHandler)( int status ) = NULL; 662 663 static irqreturn_t floppy_irq (int irq, void *dummy) 664 { 665 unsigned char status; 666 void (*handler)( int ); 667 668 handler = xchg(&FloppyIRQHandler, NULL); 669 670 if (handler) { 671 nop(); 672 status = FDC_READ( FDCREG_STATUS ); 673 DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler)); 674 handler( status ); 675 } 676 else { 677 DPRINT(("FDC irq, no handler\n")); 678 } 679 return IRQ_HANDLED; 680 } 681 682 683 /* Error handling: If some error happened, retry some times, then 684 * recalibrate, then try again, and fail after MAX_ERRORS. 685 */ 686 687 static void fd_error( void ) 688 { 689 if (IsFormatting) { 690 IsFormatting = 0; 691 FormatError = 1; 692 complete(&format_wait); 693 return; 694 } 695 696 if (!fd_request) 697 return; 698 699 fd_request->error_count++; 700 if (fd_request->error_count >= MAX_ERRORS) { 701 printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); 702 fd_end_request_cur(BLK_STS_IOERR); 703 } 704 else if (fd_request->error_count == RECALIBRATE_ERRORS) { 705 printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); 706 if (SelectedDrive != -1) 707 SUD.track = -1; 708 } 709 } 710 711 712 713 #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0) 714 715 716 /* ---------- Formatting ---------- */ 717 718 #define FILL(n,val) \ 719 do { \ 720 memset( p, val, n ); \ 721 p += n; \ 722 } while(0) 723 724 static int do_format(int drive, int type, struct atari_format_descr *desc) 725 { 726 struct request_queue *q; 727 unsigned char *p; 728 int sect, nsect; 729 unsigned long flags; 730 int ret; 731 732 if (type) { 733 type--; 734 if (type >= NUM_DISK_MINORS || 735 minor2disktype[type].drive_types > DriveType) 736 return -EINVAL; 737 } 738 739 q = unit[drive].disk[type]->queue; 740 blk_mq_freeze_queue(q); 741 blk_mq_quiesce_queue(q); 742 743 local_irq_save(flags); 744 stdma_lock(floppy_irq, NULL); 745 atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ 746 local_irq_restore(flags); 747 748 if (type) { 749 type = minor2disktype[type].index; 750 UDT = &atari_disk_type[type]; 751 } 752 753 if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { 754 ret = -EINVAL; 755 goto out; 756 } 757 758 nsect = UDT->spt; 759 p = TrackBuffer; 760 /* The track buffer is used for the raw track data, so its 761 contents become invalid! */ 762 BufferDrive = -1; 763 /* stop deselect timer */ 764 del_timer( &motor_off_timer ); 765 766 FILL( 60 * (nsect / 9), 0x4e ); 767 for( sect = 0; sect < nsect; ++sect ) { 768 FILL( 12, 0 ); 769 FILL( 3, 0xf5 ); 770 *p++ = 0xfe; 771 *p++ = desc->track; 772 *p++ = desc->head; 773 *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; 774 *p++ = 2; 775 *p++ = 0xf7; 776 FILL( 22, 0x4e ); 777 FILL( 12, 0 ); 778 FILL( 3, 0xf5 ); 779 *p++ = 0xfb; 780 FILL( 512, 0xe5 ); 781 *p++ = 0xf7; 782 FILL( 40, 0x4e ); 783 } 784 FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); 785 786 IsFormatting = 1; 787 FormatError = 0; 788 ReqTrack = desc->track; 789 ReqSide = desc->head; 790 do_fd_action( drive ); 791 792 wait_for_completion(&format_wait); 793 794 ret = FormatError ? -EIO : 0; 795 out: 796 blk_mq_unquiesce_queue(q); 797 blk_mq_unfreeze_queue(q); 798 return ret; 799 } 800 801 802 /* do_fd_action() is the general procedure for a fd request: All 803 * required parameter settings (drive select, side select, track 804 * position) are checked and set if needed. For each of these 805 * parameters and the actual reading or writing exist two functions: 806 * one that starts the setting (or skips it if possible) and one 807 * callback for the "done" interrupt. Each done func calls the next 808 * set function to propagate the request down to fd_rwsec_done(). 809 */ 810 811 static void do_fd_action( int drive ) 812 { 813 DPRINT(("do_fd_action\n")); 814 815 if (UseTrackbuffer && !IsFormatting) { 816 repeat: 817 if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { 818 if (ReqCmd == READ) { 819 copy_buffer( SECTOR_BUFFER(ReqSector), ReqData ); 820 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 821 /* read next sector */ 822 setup_req_params( drive ); 823 goto repeat; 824 } 825 else { 826 /* all sectors finished */ 827 fd_end_request_cur(BLK_STS_OK); 828 return; 829 } 830 } 831 else { 832 /* cmd == WRITE, pay attention to track buffer 833 * consistency! */ 834 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); 835 } 836 } 837 } 838 839 if (SelectedDrive != drive) 840 fd_select_drive( drive ); 841 842 if (UD.track == -1) 843 fd_calibrate(); 844 else if (UD.track != ReqTrack << UDT->stretch) 845 fd_seek(); 846 else if (IsFormatting) 847 fd_writetrack(); 848 else 849 fd_rwsec(); 850 } 851 852 853 /* Seek to track 0 if the current track is unknown */ 854 855 static void fd_calibrate( void ) 856 { 857 if (SUD.track >= 0) { 858 fd_calibrate_done( 0 ); 859 return; 860 } 861 862 if (ATARIHW_PRESENT(FDCSPEED)) 863 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */ 864 DPRINT(("fd_calibrate\n")); 865 SET_IRQ_HANDLER( fd_calibrate_done ); 866 /* we can't verify, since the speed may be incorrect */ 867 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); 868 869 NeedSeek = 1; 870 MotorOn = 1; 871 start_timeout(); 872 /* wait for IRQ */ 873 } 874 875 876 static void fd_calibrate_done( int status ) 877 { 878 DPRINT(("fd_calibrate_done()\n")); 879 stop_timeout(); 880 881 /* set the correct speed now */ 882 if (ATARIHW_PRESENT(FDCSPEED)) 883 dma_wd.fdc_speed = SUDT->fdc_speed; 884 if (status & FDCSTAT_RECNF) { 885 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); 886 fd_error(); 887 } 888 else { 889 SUD.track = 0; 890 fd_seek(); 891 } 892 } 893 894 895 /* Seek the drive to the requested track. The drive must have been 896 * calibrated at some point before this. 897 */ 898 899 static void fd_seek( void ) 900 { 901 if (SUD.track == ReqTrack << SUDT->stretch) { 902 fd_seek_done( 0 ); 903 return; 904 } 905 906 if (ATARIHW_PRESENT(FDCSPEED)) { 907 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ 908 MFPDELAY(); 909 } 910 911 DPRINT(("fd_seek() to track %d\n",ReqTrack)); 912 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); 913 udelay(25); 914 SET_IRQ_HANDLER( fd_seek_done ); 915 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); 916 917 MotorOn = 1; 918 set_head_settle_flag(); 919 start_timeout(); 920 /* wait for IRQ */ 921 } 922 923 924 static void fd_seek_done( int status ) 925 { 926 DPRINT(("fd_seek_done()\n")); 927 stop_timeout(); 928 929 /* set the correct speed */ 930 if (ATARIHW_PRESENT(FDCSPEED)) 931 dma_wd.fdc_speed = SUDT->fdc_speed; 932 if (status & FDCSTAT_RECNF) { 933 printk(KERN_ERR "fd%d: seek error (to track %d)\n", 934 SelectedDrive, ReqTrack ); 935 /* we don't know exactly which track we are on now! */ 936 SUD.track = -1; 937 fd_error(); 938 } 939 else { 940 SUD.track = ReqTrack << SUDT->stretch; 941 NeedSeek = 0; 942 if (IsFormatting) 943 fd_writetrack(); 944 else 945 fd_rwsec(); 946 } 947 } 948 949 950 /* This does the actual reading/writing after positioning the head 951 * over the correct track. 952 */ 953 954 static int MultReadInProgress = 0; 955 956 957 static void fd_rwsec( void ) 958 { 959 unsigned long paddr, flags; 960 unsigned int rwflag, old_motoron; 961 unsigned int track; 962 963 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); 964 if (ReqCmd == WRITE) { 965 if (ATARIHW_PRESENT(EXTD_DMA)) { 966 paddr = virt_to_phys(ReqData); 967 } 968 else { 969 copy_buffer( ReqData, DMABuffer ); 970 paddr = PhysDMABuffer; 971 } 972 dma_cache_maintenance( paddr, 512, 1 ); 973 rwflag = 0x100; 974 } 975 else { 976 if (read_track) 977 paddr = PhysTrackBuffer; 978 else 979 paddr = ATARIHW_PRESENT(EXTD_DMA) ? 980 virt_to_phys(ReqData) : PhysDMABuffer; 981 rwflag = 0; 982 } 983 984 fd_select_side( ReqSide ); 985 986 /* Start sector of this operation */ 987 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); 988 MFPDELAY(); 989 /* Cheat for track if stretch != 0 */ 990 if (SUDT->stretch) { 991 track = FDC_READ( FDCREG_TRACK); 992 MFPDELAY(); 993 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); 994 } 995 udelay(25); 996 997 /* Setup DMA */ 998 local_irq_save(flags); 999 dma_wd.dma_lo = (unsigned char)paddr; 1000 MFPDELAY(); 1001 paddr >>= 8; 1002 dma_wd.dma_md = (unsigned char)paddr; 1003 MFPDELAY(); 1004 paddr >>= 8; 1005 if (ATARIHW_PRESENT(EXTD_DMA)) 1006 st_dma_ext_dmahi = (unsigned short)paddr; 1007 else 1008 dma_wd.dma_hi = (unsigned char)paddr; 1009 MFPDELAY(); 1010 local_irq_restore(flags); 1011 1012 /* Clear FIFO and switch DMA to correct mode */ 1013 dma_wd.dma_mode_status = 0x90 | rwflag; 1014 MFPDELAY(); 1015 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); 1016 MFPDELAY(); 1017 dma_wd.dma_mode_status = 0x90 | rwflag; 1018 MFPDELAY(); 1019 1020 /* How many sectors for DMA */ 1021 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; 1022 1023 udelay(25); 1024 1025 /* Start operation */ 1026 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; 1027 udelay(25); 1028 SET_IRQ_HANDLER( fd_rwsec_done ); 1029 dma_wd.fdc_acces_seccount = 1030 (get_head_settle_flag() | 1031 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); 1032 1033 old_motoron = MotorOn; 1034 MotorOn = 1; 1035 NeedSeek = 1; 1036 /* wait for interrupt */ 1037 1038 if (read_track) { 1039 /* If reading a whole track, wait about one disk rotation and 1040 * then check if all sectors are read. The FDC will even 1041 * search for the first non-existent sector and need 1 sec to 1042 * recognise that it isn't present :-( 1043 */ 1044 MultReadInProgress = 1; 1045 mod_timer(&readtrack_timer, 1046 /* 1 rot. + 5 rot.s if motor was off */ 1047 jiffies + HZ/5 + (old_motoron ? 0 : HZ)); 1048 } 1049 start_timeout(); 1050 } 1051 1052 1053 static void fd_readtrack_check(struct timer_list *unused) 1054 { 1055 unsigned long flags, addr, addr2; 1056 1057 local_irq_save(flags); 1058 1059 if (!MultReadInProgress) { 1060 /* This prevents a race condition that could arise if the 1061 * interrupt is triggered while the calling of this timer 1062 * callback function takes place. The IRQ function then has 1063 * already cleared 'MultReadInProgress' when flow of control 1064 * gets here. 1065 */ 1066 local_irq_restore(flags); 1067 return; 1068 } 1069 1070 /* get the current DMA address */ 1071 /* ++ f.a. read twice to avoid being fooled by switcher */ 1072 addr = 0; 1073 do { 1074 addr2 = addr; 1075 addr = dma_wd.dma_lo & 0xff; 1076 MFPDELAY(); 1077 addr |= (dma_wd.dma_md & 0xff) << 8; 1078 MFPDELAY(); 1079 if (ATARIHW_PRESENT( EXTD_DMA )) 1080 addr |= (st_dma_ext_dmahi & 0xffff) << 16; 1081 else 1082 addr |= (dma_wd.dma_hi & 0xff) << 16; 1083 MFPDELAY(); 1084 } while(addr != addr2); 1085 1086 if (addr >= PhysTrackBuffer + SUDT->spt*512) { 1087 /* already read enough data, force an FDC interrupt to stop 1088 * the read operation 1089 */ 1090 SET_IRQ_HANDLER( NULL ); 1091 MultReadInProgress = 0; 1092 local_irq_restore(flags); 1093 DPRINT(("fd_readtrack_check(): done\n")); 1094 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1095 udelay(25); 1096 1097 /* No error until now -- the FDC would have interrupted 1098 * otherwise! 1099 */ 1100 fd_rwsec_done1(0); 1101 } 1102 else { 1103 /* not yet finished, wait another tenth rotation */ 1104 local_irq_restore(flags); 1105 DPRINT(("fd_readtrack_check(): not yet finished\n")); 1106 mod_timer(&readtrack_timer, jiffies + HZ/5/10); 1107 } 1108 } 1109 1110 1111 static void fd_rwsec_done( int status ) 1112 { 1113 DPRINT(("fd_rwsec_done()\n")); 1114 1115 if (read_track) { 1116 del_timer(&readtrack_timer); 1117 if (!MultReadInProgress) 1118 return; 1119 MultReadInProgress = 0; 1120 } 1121 fd_rwsec_done1(status); 1122 } 1123 1124 static void fd_rwsec_done1(int status) 1125 { 1126 unsigned int track; 1127 1128 stop_timeout(); 1129 1130 /* Correct the track if stretch != 0 */ 1131 if (SUDT->stretch) { 1132 track = FDC_READ( FDCREG_TRACK); 1133 MFPDELAY(); 1134 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); 1135 } 1136 1137 if (!UseTrackbuffer) { 1138 dma_wd.dma_mode_status = 0x90; 1139 MFPDELAY(); 1140 if (!(dma_wd.dma_mode_status & 0x01)) { 1141 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); 1142 goto err_end; 1143 } 1144 } 1145 MFPDELAY(); 1146 1147 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { 1148 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1149 goto err_end; 1150 } 1151 if ((status & FDCSTAT_RECNF) && 1152 /* RECNF is no error after a multiple read when the FDC 1153 searched for a non-existent sector! */ 1154 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { 1155 if (Probing) { 1156 if (SUDT > atari_disk_type) { 1157 if (SUDT[-1].blocks > ReqBlock) { 1158 /* try another disk type */ 1159 SUDT--; 1160 set_capacity(unit[SelectedDrive].disk[0], 1161 SUDT->blocks); 1162 } else 1163 Probing = 0; 1164 } 1165 else { 1166 if (SUD.flags & FTD_MSG) 1167 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", 1168 SelectedDrive, SUDT->name ); 1169 Probing=0; 1170 } 1171 } else { 1172 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ 1173 if (SUD.autoprobe) { 1174 SUDT = atari_disk_type + StartDiskType[DriveType]; 1175 set_capacity(unit[SelectedDrive].disk[0], 1176 SUDT->blocks); 1177 Probing = 1; 1178 } 1179 } 1180 if (Probing) { 1181 if (ATARIHW_PRESENT(FDCSPEED)) { 1182 dma_wd.fdc_speed = SUDT->fdc_speed; 1183 MFPDELAY(); 1184 } 1185 setup_req_params( SelectedDrive ); 1186 BufferDrive = -1; 1187 do_fd_action( SelectedDrive ); 1188 return; 1189 } 1190 1191 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", 1192 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); 1193 goto err_end; 1194 } 1195 if (status & FDCSTAT_CRC) { 1196 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", 1197 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1198 goto err_end; 1199 } 1200 if (status & FDCSTAT_LOST) { 1201 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", 1202 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1203 goto err_end; 1204 } 1205 1206 Probing = 0; 1207 1208 if (ReqCmd == READ) { 1209 if (!read_track) { 1210 void *addr; 1211 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; 1212 dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); 1213 if (!ATARIHW_PRESENT( EXTD_DMA )) 1214 copy_buffer (addr, ReqData); 1215 } else { 1216 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); 1217 BufferDrive = SelectedDrive; 1218 BufferSide = ReqSide; 1219 BufferTrack = ReqTrack; 1220 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); 1221 } 1222 } 1223 1224 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 1225 /* read next sector */ 1226 setup_req_params( SelectedDrive ); 1227 do_fd_action( SelectedDrive ); 1228 } 1229 else { 1230 /* all sectors finished */ 1231 fd_end_request_cur(BLK_STS_OK); 1232 } 1233 return; 1234 1235 err_end: 1236 BufferDrive = -1; 1237 fd_error(); 1238 } 1239 1240 1241 static void fd_writetrack( void ) 1242 { 1243 unsigned long paddr, flags; 1244 unsigned int track; 1245 1246 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); 1247 1248 paddr = PhysTrackBuffer; 1249 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); 1250 1251 fd_select_side( ReqSide ); 1252 1253 /* Cheat for track if stretch != 0 */ 1254 if (SUDT->stretch) { 1255 track = FDC_READ( FDCREG_TRACK); 1256 MFPDELAY(); 1257 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); 1258 } 1259 udelay(40); 1260 1261 /* Setup DMA */ 1262 local_irq_save(flags); 1263 dma_wd.dma_lo = (unsigned char)paddr; 1264 MFPDELAY(); 1265 paddr >>= 8; 1266 dma_wd.dma_md = (unsigned char)paddr; 1267 MFPDELAY(); 1268 paddr >>= 8; 1269 if (ATARIHW_PRESENT( EXTD_DMA )) 1270 st_dma_ext_dmahi = (unsigned short)paddr; 1271 else 1272 dma_wd.dma_hi = (unsigned char)paddr; 1273 MFPDELAY(); 1274 local_irq_restore(flags); 1275 1276 /* Clear FIFO and switch DMA to correct mode */ 1277 dma_wd.dma_mode_status = 0x190; 1278 MFPDELAY(); 1279 dma_wd.dma_mode_status = 0x90; 1280 MFPDELAY(); 1281 dma_wd.dma_mode_status = 0x190; 1282 MFPDELAY(); 1283 1284 /* How many sectors for DMA */ 1285 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; 1286 udelay(40); 1287 1288 /* Start operation */ 1289 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; 1290 udelay(40); 1291 SET_IRQ_HANDLER( fd_writetrack_done ); 1292 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); 1293 1294 MotorOn = 1; 1295 start_timeout(); 1296 /* wait for interrupt */ 1297 } 1298 1299 1300 static void fd_writetrack_done( int status ) 1301 { 1302 DPRINT(("fd_writetrack_done()\n")); 1303 1304 stop_timeout(); 1305 1306 if (status & FDCSTAT_WPROT) { 1307 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1308 goto err_end; 1309 } 1310 if (status & FDCSTAT_LOST) { 1311 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", 1312 SelectedDrive, ReqSide, ReqTrack ); 1313 goto err_end; 1314 } 1315 1316 complete(&format_wait); 1317 return; 1318 1319 err_end: 1320 fd_error(); 1321 } 1322 1323 static void fd_times_out(struct timer_list *unused) 1324 { 1325 atari_disable_irq( IRQ_MFP_FDC ); 1326 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but 1327 * before we came here... */ 1328 1329 SET_IRQ_HANDLER( NULL ); 1330 /* If the timeout occurred while the readtrack_check timer was 1331 * active, we need to cancel it, else bad things will happen */ 1332 if (UseTrackbuffer) 1333 del_timer( &readtrack_timer ); 1334 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1335 udelay( 25 ); 1336 1337 printk(KERN_ERR "floppy timeout\n" ); 1338 fd_error(); 1339 end: 1340 atari_enable_irq( IRQ_MFP_FDC ); 1341 } 1342 1343 1344 /* The (noop) seek operation here is needed to make the WP bit in the 1345 * FDC status register accessible for check_change. If the last disk 1346 * operation would have been a RDSEC, this bit would always read as 0 1347 * no matter what :-( To save time, the seek goes to the track we're 1348 * already on. 1349 */ 1350 1351 static void finish_fdc( void ) 1352 { 1353 if (!NeedSeek) { 1354 finish_fdc_done( 0 ); 1355 } 1356 else { 1357 DPRINT(("finish_fdc: dummy seek started\n")); 1358 FDC_WRITE (FDCREG_DATA, SUD.track); 1359 SET_IRQ_HANDLER( finish_fdc_done ); 1360 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); 1361 MotorOn = 1; 1362 start_timeout(); 1363 /* we must wait for the IRQ here, because the ST-DMA 1364 is released immediately afterwards and the interrupt 1365 may be delivered to the wrong driver. */ 1366 } 1367 } 1368 1369 1370 static void finish_fdc_done( int dummy ) 1371 { 1372 unsigned long flags; 1373 1374 DPRINT(("finish_fdc_done entered\n")); 1375 stop_timeout(); 1376 NeedSeek = 0; 1377 1378 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) 1379 /* If the check for a disk change is done too early after this 1380 * last seek command, the WP bit still reads wrong :-(( 1381 */ 1382 mod_timer(&fd_timer, jiffies + 5); 1383 else 1384 start_check_change_timer(); 1385 start_motor_off_timer(); 1386 1387 local_irq_save(flags); 1388 stdma_release(); 1389 local_irq_restore(flags); 1390 1391 DPRINT(("finish_fdc() finished\n")); 1392 } 1393 1394 /* The detection of disk changes is a dark chapter in Atari history :-( 1395 * Because the "Drive ready" signal isn't present in the Atari 1396 * hardware, one has to rely on the "Write Protect". This works fine, 1397 * as long as no write protected disks are used. TOS solves this 1398 * problem by introducing tri-state logic ("maybe changed") and 1399 * looking at the serial number in block 0. This isn't possible for 1400 * Linux, since the floppy driver can't make assumptions about the 1401 * filesystem used on the disk and thus the contents of block 0. I've 1402 * chosen the method to always say "The disk was changed" if it is 1403 * unsure whether it was. This implies that every open or mount 1404 * invalidates the disk buffers if you work with write protected 1405 * disks. But at least this is better than working with incorrect data 1406 * due to unrecognised disk changes. 1407 */ 1408 1409 static unsigned int floppy_check_events(struct gendisk *disk, 1410 unsigned int clearing) 1411 { 1412 struct atari_floppy_struct *p = disk->private_data; 1413 unsigned int drive = p - unit; 1414 if (test_bit (drive, &fake_change)) { 1415 /* simulated change (e.g. after formatting) */ 1416 return DISK_EVENT_MEDIA_CHANGE; 1417 } 1418 if (test_bit (drive, &changed_floppies)) { 1419 /* surely changed (the WP signal changed at least once) */ 1420 return DISK_EVENT_MEDIA_CHANGE; 1421 } 1422 if (UD.wpstat) { 1423 /* WP is on -> could be changed: to be sure, buffers should be 1424 * invalidated... 1425 */ 1426 return DISK_EVENT_MEDIA_CHANGE; 1427 } 1428 1429 return 0; 1430 } 1431 1432 static int floppy_revalidate(struct gendisk *disk) 1433 { 1434 struct atari_floppy_struct *p = disk->private_data; 1435 unsigned int drive = p - unit; 1436 1437 if (test_bit(drive, &changed_floppies) || 1438 test_bit(drive, &fake_change) || 1439 p->disktype == 0) { 1440 if (UD.flags & FTD_MSG) 1441 printk(KERN_ERR "floppy: clear format %p!\n", UDT); 1442 BufferDrive = -1; 1443 clear_bit(drive, &fake_change); 1444 clear_bit(drive, &changed_floppies); 1445 /* MSch: clearing geometry makes sense only for autoprobe 1446 formats, for 'permanent user-defined' parameter: 1447 restore default_params[] here if flagged valid! */ 1448 if (default_params[drive].blocks == 0) 1449 UDT = NULL; 1450 else 1451 UDT = &default_params[drive]; 1452 } 1453 return 0; 1454 } 1455 1456 1457 /* This sets up the global variables describing the current request. */ 1458 1459 static void setup_req_params( int drive ) 1460 { 1461 int block = ReqBlock + ReqCnt; 1462 1463 ReqTrack = block / UDT->spt; 1464 ReqSector = block - ReqTrack * UDT->spt + 1; 1465 ReqSide = ReqTrack & 1; 1466 ReqTrack >>= 1; 1467 ReqData = ReqBuffer + 512 * ReqCnt; 1468 1469 if (UseTrackbuffer) 1470 read_track = (ReqCmd == READ && fd_request->error_count == 0); 1471 else 1472 read_track = 0; 1473 1474 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, 1475 ReqTrack, ReqSector, (unsigned long)ReqData )); 1476 } 1477 1478 static void ataflop_commit_rqs(struct blk_mq_hw_ctx *hctx) 1479 { 1480 spin_lock_irq(&ataflop_lock); 1481 atari_disable_irq(IRQ_MFP_FDC); 1482 finish_fdc(); 1483 atari_enable_irq(IRQ_MFP_FDC); 1484 spin_unlock_irq(&ataflop_lock); 1485 } 1486 1487 static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx, 1488 const struct blk_mq_queue_data *bd) 1489 { 1490 struct atari_floppy_struct *floppy = bd->rq->rq_disk->private_data; 1491 int drive = floppy - unit; 1492 int type = floppy->type; 1493 1494 spin_lock_irq(&ataflop_lock); 1495 if (fd_request) { 1496 spin_unlock_irq(&ataflop_lock); 1497 return BLK_STS_DEV_RESOURCE; 1498 } 1499 if (!stdma_try_lock(floppy_irq, NULL)) { 1500 spin_unlock_irq(&ataflop_lock); 1501 return BLK_STS_RESOURCE; 1502 } 1503 fd_request = bd->rq; 1504 blk_mq_start_request(fd_request); 1505 1506 atari_disable_irq( IRQ_MFP_FDC ); 1507 1508 IsFormatting = 0; 1509 1510 if (!UD.connected) { 1511 /* drive not connected */ 1512 printk(KERN_ERR "Unknown Device: fd%d\n", drive ); 1513 fd_end_request_cur(BLK_STS_IOERR); 1514 goto out; 1515 } 1516 1517 if (type == 0) { 1518 if (!UDT) { 1519 Probing = 1; 1520 UDT = atari_disk_type + StartDiskType[DriveType]; 1521 set_capacity(bd->rq->rq_disk, UDT->blocks); 1522 UD.autoprobe = 1; 1523 } 1524 } 1525 else { 1526 /* user supplied disk type */ 1527 if (--type >= NUM_DISK_MINORS) { 1528 printk(KERN_WARNING "fd%d: invalid disk format", drive ); 1529 fd_end_request_cur(BLK_STS_IOERR); 1530 goto out; 1531 } 1532 if (minor2disktype[type].drive_types > DriveType) { 1533 printk(KERN_WARNING "fd%d: unsupported disk format", drive ); 1534 fd_end_request_cur(BLK_STS_IOERR); 1535 goto out; 1536 } 1537 type = minor2disktype[type].index; 1538 UDT = &atari_disk_type[type]; 1539 set_capacity(bd->rq->rq_disk, UDT->blocks); 1540 UD.autoprobe = 0; 1541 } 1542 1543 /* stop deselect timer */ 1544 del_timer( &motor_off_timer ); 1545 1546 ReqCnt = 0; 1547 ReqCmd = rq_data_dir(fd_request); 1548 ReqBlock = blk_rq_pos(fd_request); 1549 ReqBuffer = bio_data(fd_request->bio); 1550 setup_req_params( drive ); 1551 do_fd_action( drive ); 1552 1553 if (bd->last) 1554 finish_fdc(); 1555 atari_enable_irq( IRQ_MFP_FDC ); 1556 1557 out: 1558 spin_unlock_irq(&ataflop_lock); 1559 return BLK_STS_OK; 1560 } 1561 1562 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, 1563 unsigned int cmd, unsigned long param) 1564 { 1565 struct gendisk *disk = bdev->bd_disk; 1566 struct atari_floppy_struct *floppy = disk->private_data; 1567 int drive = floppy - unit; 1568 int type = floppy->type; 1569 struct atari_format_descr fmt_desc; 1570 struct atari_disk_type *dtp; 1571 struct floppy_struct getprm; 1572 int settype; 1573 struct floppy_struct setprm; 1574 void __user *argp = (void __user *)param; 1575 1576 switch (cmd) { 1577 case FDGETPRM: 1578 if (type) { 1579 if (--type >= NUM_DISK_MINORS) 1580 return -ENODEV; 1581 if (minor2disktype[type].drive_types > DriveType) 1582 return -ENODEV; 1583 type = minor2disktype[type].index; 1584 dtp = &atari_disk_type[type]; 1585 if (UD.flags & FTD_MSG) 1586 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", 1587 drive, dtp, dtp->name); 1588 } 1589 else { 1590 if (!UDT) 1591 return -ENXIO; 1592 else 1593 dtp = UDT; 1594 } 1595 memset((void *)&getprm, 0, sizeof(getprm)); 1596 getprm.size = dtp->blocks; 1597 getprm.sect = dtp->spt; 1598 getprm.head = 2; 1599 getprm.track = dtp->blocks/dtp->spt/2; 1600 getprm.stretch = dtp->stretch; 1601 if (copy_to_user(argp, &getprm, sizeof(getprm))) 1602 return -EFAULT; 1603 return 0; 1604 } 1605 switch (cmd) { 1606 case FDSETPRM: 1607 case FDDEFPRM: 1608 /* 1609 * MSch 7/96: simple 'set geometry' case: just set the 1610 * 'default' device params (minor == 0). 1611 * Currently, the drive geometry is cleared after each 1612 * disk change and subsequent revalidate()! simple 1613 * implementation of FDDEFPRM: save geometry from a 1614 * FDDEFPRM call and restore it in floppy_revalidate() ! 1615 */ 1616 1617 /* get the parameters from user space */ 1618 if (floppy->ref != 1 && floppy->ref != -1) 1619 return -EBUSY; 1620 if (copy_from_user(&setprm, argp, sizeof(setprm))) 1621 return -EFAULT; 1622 /* 1623 * first of all: check for floppy change and revalidate, 1624 * or the next access will revalidate - and clear UDT :-( 1625 */ 1626 1627 if (floppy_check_events(disk, 0)) 1628 floppy_revalidate(disk); 1629 1630 if (UD.flags & FTD_MSG) 1631 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", 1632 drive, setprm.size, setprm.sect, setprm.stretch); 1633 1634 /* what if type > 0 here? Overwrite specified entry ? */ 1635 if (type) { 1636 /* refuse to re-set a predefined type for now */ 1637 return -EINVAL; 1638 } 1639 1640 /* 1641 * type == 0: first look for a matching entry in the type list, 1642 * and set the UD.disktype field to use the perdefined entry. 1643 * TODO: add user-defined format to head of autoprobe list ? 1644 * Useful to include the user-type for future autodetection! 1645 */ 1646 1647 for (settype = 0; settype < NUM_DISK_MINORS; settype++) { 1648 int setidx = 0; 1649 if (minor2disktype[settype].drive_types > DriveType) { 1650 /* skip this one, invalid for drive ... */ 1651 continue; 1652 } 1653 setidx = minor2disktype[settype].index; 1654 dtp = &atari_disk_type[setidx]; 1655 1656 /* found matching entry ?? */ 1657 if ( dtp->blocks == setprm.size 1658 && dtp->spt == setprm.sect 1659 && dtp->stretch == setprm.stretch ) { 1660 if (UD.flags & FTD_MSG) 1661 printk (KERN_INFO "floppy%d: setting %s %p!\n", 1662 drive, dtp->name, dtp); 1663 UDT = dtp; 1664 set_capacity(disk, UDT->blocks); 1665 1666 if (cmd == FDDEFPRM) { 1667 /* save settings as permanent default type */ 1668 default_params[drive].name = dtp->name; 1669 default_params[drive].spt = dtp->spt; 1670 default_params[drive].blocks = dtp->blocks; 1671 default_params[drive].fdc_speed = dtp->fdc_speed; 1672 default_params[drive].stretch = dtp->stretch; 1673 } 1674 1675 return 0; 1676 } 1677 1678 } 1679 1680 /* no matching disk type found above - setting user_params */ 1681 1682 if (cmd == FDDEFPRM) { 1683 /* set permanent type */ 1684 dtp = &default_params[drive]; 1685 } else 1686 /* set user type (reset by disk change!) */ 1687 dtp = &user_params[drive]; 1688 1689 dtp->name = "user format"; 1690 dtp->blocks = setprm.size; 1691 dtp->spt = setprm.sect; 1692 if (setprm.sect > 14) 1693 dtp->fdc_speed = 3; 1694 else 1695 dtp->fdc_speed = 0; 1696 dtp->stretch = setprm.stretch; 1697 1698 if (UD.flags & FTD_MSG) 1699 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", 1700 drive, dtp->blocks, dtp->spt, dtp->stretch); 1701 1702 /* sanity check */ 1703 if (setprm.track != dtp->blocks/dtp->spt/2 || 1704 setprm.head != 2) 1705 return -EINVAL; 1706 1707 UDT = dtp; 1708 set_capacity(disk, UDT->blocks); 1709 1710 return 0; 1711 case FDMSGON: 1712 UD.flags |= FTD_MSG; 1713 return 0; 1714 case FDMSGOFF: 1715 UD.flags &= ~FTD_MSG; 1716 return 0; 1717 case FDSETEMSGTRESH: 1718 return -EINVAL; 1719 case FDFMTBEG: 1720 return 0; 1721 case FDFMTTRK: 1722 if (floppy->ref != 1 && floppy->ref != -1) 1723 return -EBUSY; 1724 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc))) 1725 return -EFAULT; 1726 return do_format(drive, type, &fmt_desc); 1727 case FDCLRPRM: 1728 UDT = NULL; 1729 /* MSch: invalidate default_params */ 1730 default_params[drive].blocks = 0; 1731 set_capacity(disk, MAX_DISK_SIZE * 2); 1732 fallthrough; 1733 case FDFMTEND: 1734 case FDFLUSH: 1735 /* invalidate the buffer track to force a reread */ 1736 BufferDrive = -1; 1737 set_bit(drive, &fake_change); 1738 if (bdev_check_media_change(bdev)) 1739 floppy_revalidate(bdev->bd_disk); 1740 return 0; 1741 default: 1742 return -EINVAL; 1743 } 1744 } 1745 1746 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 1747 unsigned int cmd, unsigned long arg) 1748 { 1749 int ret; 1750 1751 mutex_lock(&ataflop_mutex); 1752 ret = fd_locked_ioctl(bdev, mode, cmd, arg); 1753 mutex_unlock(&ataflop_mutex); 1754 1755 return ret; 1756 } 1757 1758 /* Initialize the 'unit' variable for drive 'drive' */ 1759 1760 static void __init fd_probe( int drive ) 1761 { 1762 UD.connected = 0; 1763 UDT = NULL; 1764 1765 if (!fd_test_drive_present( drive )) 1766 return; 1767 1768 UD.connected = 1; 1769 UD.track = 0; 1770 switch( UserSteprate[drive] ) { 1771 case 2: 1772 UD.steprate = FDCSTEP_2; 1773 break; 1774 case 3: 1775 UD.steprate = FDCSTEP_3; 1776 break; 1777 case 6: 1778 UD.steprate = FDCSTEP_6; 1779 break; 1780 case 12: 1781 UD.steprate = FDCSTEP_12; 1782 break; 1783 default: /* should be -1 for "not set by user" */ 1784 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) 1785 UD.steprate = FDCSTEP_3; 1786 else 1787 UD.steprate = FDCSTEP_6; 1788 break; 1789 } 1790 MotorOn = 1; /* from probe restore operation! */ 1791 } 1792 1793 1794 /* This function tests the physical presence of a floppy drive (not 1795 * whether a disk is inserted). This is done by issuing a restore 1796 * command, waiting max. 2 seconds (that should be enough to move the 1797 * head across the whole disk) and looking at the state of the "TR00" 1798 * signal. This should now be raised if there is a drive connected 1799 * (and there is no hardware failure :-) Otherwise, the drive is 1800 * declared absent. 1801 */ 1802 1803 static int __init fd_test_drive_present( int drive ) 1804 { 1805 unsigned long timeout; 1806 unsigned char status; 1807 int ok; 1808 1809 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); 1810 fd_select_drive( drive ); 1811 1812 /* disable interrupt temporarily */ 1813 atari_turnoff_irq( IRQ_MFP_FDC ); 1814 FDC_WRITE (FDCREG_TRACK, 0xff00); 1815 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); 1816 1817 timeout = jiffies + 2*HZ+HZ/2; 1818 while (time_before(jiffies, timeout)) 1819 if (!(st_mfp.par_dt_reg & 0x20)) 1820 break; 1821 1822 status = FDC_READ( FDCREG_STATUS ); 1823 ok = (status & FDCSTAT_TR00) != 0; 1824 1825 /* force interrupt to abort restore operation (FDC would try 1826 * about 50 seconds!) */ 1827 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1828 udelay(500); 1829 status = FDC_READ( FDCREG_STATUS ); 1830 udelay(20); 1831 1832 if (ok) { 1833 /* dummy seek command to make WP bit accessible */ 1834 FDC_WRITE( FDCREG_DATA, 0 ); 1835 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); 1836 while( st_mfp.par_dt_reg & 0x20 ) 1837 ; 1838 status = FDC_READ( FDCREG_STATUS ); 1839 } 1840 1841 atari_turnon_irq( IRQ_MFP_FDC ); 1842 return( ok ); 1843 } 1844 1845 1846 /* Look how many and which kind of drives are connected. If there are 1847 * floppies, additionally start the disk-change and motor-off timers. 1848 */ 1849 1850 static void __init config_types( void ) 1851 { 1852 int drive, cnt = 0; 1853 1854 /* for probing drives, set the FDC speed to 8 MHz */ 1855 if (ATARIHW_PRESENT(FDCSPEED)) 1856 dma_wd.fdc_speed = 0; 1857 1858 printk(KERN_INFO "Probing floppy drive(s):\n"); 1859 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { 1860 fd_probe( drive ); 1861 if (UD.connected) { 1862 printk(KERN_INFO "fd%d\n", drive); 1863 ++cnt; 1864 } 1865 } 1866 1867 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { 1868 /* If FDC is still busy from probing, give it another FORCI 1869 * command to abort the operation. If this isn't done, the FDC 1870 * will interrupt later and its IRQ line stays low, because 1871 * the status register isn't read. And this will block any 1872 * interrupts on this IRQ line :-( 1873 */ 1874 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1875 udelay(500); 1876 FDC_READ( FDCREG_STATUS ); 1877 udelay(20); 1878 } 1879 1880 if (cnt > 0) { 1881 start_motor_off_timer(); 1882 if (cnt == 1) fd_select_drive( 0 ); 1883 start_check_change_timer(); 1884 } 1885 } 1886 1887 /* 1888 * floppy_open check for aliasing (/dev/fd0 can be the same as 1889 * /dev/PS0 etc), and disallows simultaneous access to the same 1890 * drive with different device numbers. 1891 */ 1892 1893 static int floppy_open(struct block_device *bdev, fmode_t mode) 1894 { 1895 struct atari_floppy_struct *p = bdev->bd_disk->private_data; 1896 int type = MINOR(bdev->bd_dev) >> 2; 1897 1898 DPRINT(("fd_open: type=%d\n",type)); 1899 if (p->ref && p->type != type) 1900 return -EBUSY; 1901 1902 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL)) 1903 return -EBUSY; 1904 1905 if (mode & FMODE_EXCL) 1906 p->ref = -1; 1907 else 1908 p->ref++; 1909 1910 p->type = type; 1911 1912 if (mode & FMODE_NDELAY) 1913 return 0; 1914 1915 if (mode & (FMODE_READ|FMODE_WRITE)) { 1916 if (bdev_check_media_change(bdev)) 1917 floppy_revalidate(bdev->bd_disk); 1918 if (mode & FMODE_WRITE) { 1919 if (p->wpstat) { 1920 if (p->ref < 0) 1921 p->ref = 0; 1922 else 1923 p->ref--; 1924 return -EROFS; 1925 } 1926 } 1927 } 1928 return 0; 1929 } 1930 1931 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) 1932 { 1933 int ret; 1934 1935 mutex_lock(&ataflop_mutex); 1936 ret = floppy_open(bdev, mode); 1937 mutex_unlock(&ataflop_mutex); 1938 1939 return ret; 1940 } 1941 1942 static void floppy_release(struct gendisk *disk, fmode_t mode) 1943 { 1944 struct atari_floppy_struct *p = disk->private_data; 1945 mutex_lock(&ataflop_mutex); 1946 if (p->ref < 0) 1947 p->ref = 0; 1948 else if (!p->ref--) { 1949 printk(KERN_ERR "floppy_release with fd_ref == 0"); 1950 p->ref = 0; 1951 } 1952 mutex_unlock(&ataflop_mutex); 1953 } 1954 1955 static const struct block_device_operations floppy_fops = { 1956 .owner = THIS_MODULE, 1957 .open = floppy_unlocked_open, 1958 .release = floppy_release, 1959 .ioctl = fd_ioctl, 1960 .check_events = floppy_check_events, 1961 }; 1962 1963 static const struct blk_mq_ops ataflop_mq_ops = { 1964 .queue_rq = ataflop_queue_rq, 1965 .commit_rqs = ataflop_commit_rqs, 1966 }; 1967 1968 static int ataflop_alloc_disk(unsigned int drive, unsigned int type) 1969 { 1970 struct gendisk *disk; 1971 int ret; 1972 1973 disk = alloc_disk(1); 1974 if (!disk) 1975 return -ENOMEM; 1976 1977 disk->queue = blk_mq_init_queue(&unit[drive].tag_set); 1978 if (IS_ERR(disk->queue)) { 1979 ret = PTR_ERR(disk->queue); 1980 disk->queue = NULL; 1981 put_disk(disk); 1982 return ret; 1983 } 1984 1985 disk->major = FLOPPY_MAJOR; 1986 disk->first_minor = drive + (type << 2); 1987 sprintf(disk->disk_name, "fd%d", drive); 1988 disk->fops = &floppy_fops; 1989 disk->events = DISK_EVENT_MEDIA_CHANGE; 1990 disk->private_data = &unit[drive]; 1991 set_capacity(disk, MAX_DISK_SIZE * 2); 1992 1993 unit[drive].disk[type] = disk; 1994 return 0; 1995 } 1996 1997 static DEFINE_MUTEX(ataflop_probe_lock); 1998 1999 static void ataflop_probe(dev_t dev) 2000 { 2001 int drive = MINOR(dev) & 3; 2002 int type = MINOR(dev) >> 2; 2003 2004 if (type) 2005 type--; 2006 2007 if (drive >= FD_MAX_UNITS || type >= NUM_DISK_MINORS) 2008 return; 2009 mutex_lock(&ataflop_probe_lock); 2010 if (!unit[drive].disk[type]) { 2011 if (ataflop_alloc_disk(drive, type) == 0) 2012 add_disk(unit[drive].disk[type]); 2013 } 2014 mutex_unlock(&ataflop_probe_lock); 2015 } 2016 2017 static int __init atari_floppy_init (void) 2018 { 2019 int i; 2020 int ret; 2021 2022 if (!MACH_IS_ATARI) 2023 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ 2024 return -ENODEV; 2025 2026 mutex_lock(&ataflop_probe_lock); 2027 ret = __register_blkdev(FLOPPY_MAJOR, "fd", ataflop_probe); 2028 if (ret) 2029 goto out_unlock; 2030 2031 for (i = 0; i < FD_MAX_UNITS; i++) { 2032 memset(&unit[i].tag_set, 0, sizeof(unit[i].tag_set)); 2033 unit[i].tag_set.ops = &ataflop_mq_ops; 2034 unit[i].tag_set.nr_hw_queues = 1; 2035 unit[i].tag_set.nr_maps = 1; 2036 unit[i].tag_set.queue_depth = 2; 2037 unit[i].tag_set.numa_node = NUMA_NO_NODE; 2038 unit[i].tag_set.flags = BLK_MQ_F_SHOULD_MERGE; 2039 ret = blk_mq_alloc_tag_set(&unit[i].tag_set); 2040 if (ret) 2041 goto err; 2042 2043 ret = ataflop_alloc_disk(i, 0); 2044 if (ret) { 2045 blk_mq_free_tag_set(&unit[i].tag_set); 2046 goto err; 2047 } 2048 } 2049 2050 if (UseTrackbuffer < 0) 2051 /* not set by user -> use default: for now, we turn 2052 track buffering off for all Medusas, though it 2053 could be used with ones that have a counter 2054 card. But the test is too hard :-( */ 2055 UseTrackbuffer = !MACH_IS_MEDUSA; 2056 2057 /* initialize variables */ 2058 SelectedDrive = -1; 2059 BufferDrive = -1; 2060 2061 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); 2062 if (!DMABuffer) { 2063 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); 2064 ret = -ENOMEM; 2065 goto err; 2066 } 2067 TrackBuffer = DMABuffer + 512; 2068 PhysDMABuffer = atari_stram_to_phys(DMABuffer); 2069 PhysTrackBuffer = virt_to_phys(TrackBuffer); 2070 BufferDrive = BufferSide = BufferTrack = -1; 2071 2072 for (i = 0; i < FD_MAX_UNITS; i++) { 2073 unit[i].track = -1; 2074 unit[i].flags = 0; 2075 add_disk(unit[i].disk[0]); 2076 } 2077 2078 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", 2079 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', 2080 UseTrackbuffer ? "" : "no "); 2081 config_types(); 2082 2083 return 0; 2084 2085 err: 2086 while (--i >= 0) { 2087 blk_cleanup_queue(unit[i].disk[0]->queue); 2088 put_disk(unit[i].disk[0]); 2089 blk_mq_free_tag_set(&unit[i].tag_set); 2090 } 2091 2092 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2093 out_unlock: 2094 mutex_unlock(&ataflop_probe_lock); 2095 return ret; 2096 } 2097 2098 #ifndef MODULE 2099 static int __init atari_floppy_setup(char *str) 2100 { 2101 int ints[3 + FD_MAX_UNITS]; 2102 int i; 2103 2104 if (!MACH_IS_ATARI) 2105 return 0; 2106 2107 str = get_options(str, 3 + FD_MAX_UNITS, ints); 2108 2109 if (ints[0] < 1) { 2110 printk(KERN_ERR "ataflop_setup: no arguments!\n" ); 2111 return 0; 2112 } 2113 else if (ints[0] > 2+FD_MAX_UNITS) { 2114 printk(KERN_ERR "ataflop_setup: too many arguments\n" ); 2115 } 2116 2117 if (ints[1] < 0 || ints[1] > 2) 2118 printk(KERN_ERR "ataflop_setup: bad drive type\n" ); 2119 else 2120 DriveType = ints[1]; 2121 2122 if (ints[0] >= 2) 2123 UseTrackbuffer = (ints[2] > 0); 2124 2125 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { 2126 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) 2127 printk(KERN_ERR "ataflop_setup: bad steprate\n" ); 2128 else 2129 UserSteprate[i-3] = ints[i]; 2130 } 2131 return 1; 2132 } 2133 2134 __setup("floppy=", atari_floppy_setup); 2135 #endif 2136 2137 static void __exit atari_floppy_exit(void) 2138 { 2139 int i, type; 2140 2141 for (i = 0; i < FD_MAX_UNITS; i++) { 2142 for (type = 0; type < NUM_DISK_MINORS; type++) { 2143 if (!unit[i].disk[type]) 2144 continue; 2145 del_gendisk(unit[i].disk[type]); 2146 blk_cleanup_queue(unit[i].disk[type]->queue); 2147 put_disk(unit[i].disk[type]); 2148 } 2149 blk_mq_free_tag_set(&unit[i].tag_set); 2150 } 2151 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2152 2153 del_timer_sync(&fd_timer); 2154 atari_stram_free( DMABuffer ); 2155 } 2156 2157 module_init(atari_floppy_init) 2158 module_exit(atari_floppy_exit) 2159 2160 MODULE_LICENSE("GPL"); 2161