Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acsi.c -- Device driver for Atari ACSI hard disks |
| 3 | * |
| 4 | * Copyright 1994 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> |
| 5 | * |
| 6 | * Some parts are based on hd.c by Linus Torvalds |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General Public |
| 9 | * License. See the file COPYING in the main directory of this archive for |
| 10 | * more details. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | /* |
| 15 | * Still to in this file: |
| 16 | * - If a command ends with an error status (!= 0), the following |
| 17 | * REQUEST SENSE commands (4 to fill the ST-DMA FIFO) are done by |
| 18 | * polling the _IRQ signal (not interrupt-driven). This should be |
| 19 | * avoided in future because it takes up a non-neglectible time in |
| 20 | * the interrupt service routine while interrupts are disabled. |
| 21 | * Maybe a timer interrupt will get lost :-( |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * General notes: |
| 26 | * |
| 27 | * - All ACSI devices (disks, CD-ROMs, ...) use major number 28. |
| 28 | * Minors are organized like it is with SCSI: The upper 4 bits |
| 29 | * identify the device, the lower 4 bits the partition. |
| 30 | * The device numbers (the upper 4 bits) are given in the same |
| 31 | * order as the devices are found on the bus. |
| 32 | * - Up to 8 LUNs are supported for each target (if CONFIG_ACSI_MULTI_LUN |
| 33 | * is defined), but only a total of 16 devices (due to minor |
| 34 | * numbers...). Note that Atari allows only a maximum of 4 targets |
| 35 | * (i.e. controllers, not devices) on the ACSI bus! |
| 36 | * - A optimizing scheme similar to SCSI scatter-gather is implemented. |
| 37 | * - Removable media are supported. After a medium change to device |
| 38 | * is reinitialized (partition check etc.). Also, if the device |
| 39 | * knows the PREVENT/ALLOW MEDIUM REMOVAL command, the door should |
| 40 | * be locked and unlocked when mounting the first or unmounting the |
| 41 | * last filesystem on the device. The code is untested, because I |
| 42 | * don't have a removable hard disk. |
| 43 | * |
| 44 | */ |
| 45 | |
| 46 | #include <linux/config.h> |
| 47 | #include <linux/module.h> |
| 48 | #include <linux/errno.h> |
| 49 | #include <linux/signal.h> |
| 50 | #include <linux/sched.h> |
| 51 | #include <linux/timer.h> |
| 52 | #include <linux/fs.h> |
| 53 | #include <linux/kernel.h> |
| 54 | #include <linux/genhd.h> |
| 55 | #include <linux/delay.h> |
| 56 | #include <linux/mm.h> |
| 57 | #include <linux/major.h> |
| 58 | #include <linux/slab.h> |
| 59 | #include <linux/interrupt.h> |
| 60 | #include <scsi/scsi.h> /* for SCSI_IOCTL_GET_IDLUN */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <scsi/scsi_ioctl.h> |
| 62 | #include <linux/hdreg.h> /* for HDIO_GETGEO */ |
| 63 | #include <linux/blkpg.h> |
| 64 | #include <linux/buffer_head.h> |
| 65 | #include <linux/blkdev.h> |
| 66 | |
| 67 | #include <asm/setup.h> |
| 68 | #include <asm/pgtable.h> |
| 69 | #include <asm/system.h> |
| 70 | #include <asm/uaccess.h> |
| 71 | #include <asm/atarihw.h> |
| 72 | #include <asm/atariints.h> |
| 73 | #include <asm/atari_acsi.h> |
| 74 | #include <asm/atari_stdma.h> |
| 75 | #include <asm/atari_stram.h> |
| 76 | |
| 77 | static void (*do_acsi)(void) = NULL; |
| 78 | static struct request_queue *acsi_queue; |
| 79 | #define QUEUE (acsi_queue) |
| 80 | #define CURRENT elv_next_request(acsi_queue) |
| 81 | |
| 82 | #define DEBUG |
| 83 | #undef DEBUG_DETECT |
| 84 | #undef NO_WRITE |
| 85 | |
| 86 | #define MAX_ERRORS 8 /* Max read/write errors/sector */ |
| 87 | #define MAX_LUN 8 /* Max LUNs per target */ |
| 88 | #define MAX_DEV 16 |
| 89 | |
| 90 | #define ACSI_BUFFER_SIZE (16*1024) /* "normal" ACSI buffer size */ |
| 91 | #define ACSI_BUFFER_MINSIZE (2048) /* min. buf size if ext. DMA */ |
| 92 | #define ACSI_BUFFER_SIZE_ORDER 2 /* order size for above */ |
| 93 | #define ACSI_BUFFER_MINSIZE_ORDER 0 /* order size for above */ |
| 94 | #define ACSI_BUFFER_SECTORS (ACSI_BUFFER_SIZE/512) |
| 95 | |
| 96 | #define ACSI_BUFFER_ORDER \ |
| 97 | (ATARIHW_PRESENT(EXTD_DMA) ? \ |
| 98 | ACSI_BUFFER_MINSIZE_ORDER : \ |
| 99 | ACSI_BUFFER_SIZE_ORDER) |
| 100 | |
| 101 | #define ACSI_TIMEOUT (4*HZ) |
| 102 | |
| 103 | /* minimum delay between two commands */ |
| 104 | |
| 105 | #define COMMAND_DELAY 500 |
| 106 | |
| 107 | typedef enum { |
| 108 | NONE, HARDDISK, CDROM |
| 109 | } ACSI_TYPE; |
| 110 | |
| 111 | struct acsi_info_struct { |
| 112 | ACSI_TYPE type; /* type of device */ |
| 113 | unsigned target; /* target number */ |
| 114 | unsigned lun; /* LUN in target controller */ |
| 115 | unsigned removable : 1; /* Flag for removable media */ |
| 116 | unsigned read_only : 1; /* Flag for read only devices */ |
| 117 | unsigned old_atari_disk : 1; /* Is an old Atari disk */ |
| 118 | unsigned changed : 1; /* Medium has been changed */ |
| 119 | unsigned long size; /* #blocks */ |
| 120 | int access_count; |
| 121 | } acsi_info[MAX_DEV]; |
| 122 | |
| 123 | /* |
| 124 | * SENSE KEYS |
| 125 | */ |
| 126 | |
| 127 | #define NO_SENSE 0x00 |
| 128 | #define RECOVERED_ERROR 0x01 |
| 129 | #define NOT_READY 0x02 |
| 130 | #define MEDIUM_ERROR 0x03 |
| 131 | #define HARDWARE_ERROR 0x04 |
| 132 | #define ILLEGAL_REQUEST 0x05 |
| 133 | #define UNIT_ATTENTION 0x06 |
| 134 | #define DATA_PROTECT 0x07 |
| 135 | #define BLANK_CHECK 0x08 |
| 136 | #define COPY_ABORTED 0x0a |
| 137 | #define ABORTED_COMMAND 0x0b |
| 138 | #define VOLUME_OVERFLOW 0x0d |
| 139 | #define MISCOMPARE 0x0e |
| 140 | |
| 141 | |
| 142 | /* |
| 143 | * DEVICE TYPES |
| 144 | */ |
| 145 | |
| 146 | #define TYPE_DISK 0x00 |
| 147 | #define TYPE_TAPE 0x01 |
| 148 | #define TYPE_WORM 0x04 |
| 149 | #define TYPE_ROM 0x05 |
| 150 | #define TYPE_MOD 0x07 |
| 151 | #define TYPE_NO_LUN 0x7f |
| 152 | |
| 153 | /* The data returned by MODE SENSE differ between the old Atari |
| 154 | * hard disks and SCSI disks connected to ACSI. In the following, both |
| 155 | * formats are defined and some macros to operate on them potably. |
| 156 | */ |
| 157 | |
| 158 | typedef struct { |
| 159 | unsigned long dummy[2]; |
| 160 | unsigned long sector_size; |
| 161 | unsigned char format_code; |
| 162 | #define ATARI_SENSE_FORMAT_FIX 1 |
| 163 | #define ATARI_SENSE_FORMAT_CHNG 2 |
| 164 | unsigned char cylinders_h; |
| 165 | unsigned char cylinders_l; |
| 166 | unsigned char heads; |
| 167 | unsigned char reduced_h; |
| 168 | unsigned char reduced_l; |
| 169 | unsigned char precomp_h; |
| 170 | unsigned char precomp_l; |
| 171 | unsigned char landing_zone; |
| 172 | unsigned char steprate; |
| 173 | unsigned char type; |
| 174 | #define ATARI_SENSE_TYPE_FIXCHNG_MASK 4 |
| 175 | #define ATARI_SENSE_TYPE_SOFTHARD_MASK 8 |
| 176 | #define ATARI_SENSE_TYPE_FIX 4 |
| 177 | #define ATARI_SENSE_TYPE_CHNG 0 |
| 178 | #define ATARI_SENSE_TYPE_SOFT 0 |
| 179 | #define ATARI_SENSE_TYPE_HARD 8 |
| 180 | unsigned char sectors; |
| 181 | } ATARI_SENSE_DATA; |
| 182 | |
| 183 | #define ATARI_CAPACITY(sd) \ |
| 184 | (((int)((sd).cylinders_h<<8)|(sd).cylinders_l) * \ |
| 185 | (sd).heads * (sd).sectors) |
| 186 | |
| 187 | |
| 188 | typedef struct { |
| 189 | unsigned char dummy1; |
| 190 | unsigned char medium_type; |
| 191 | unsigned char dummy2; |
| 192 | unsigned char descriptor_size; |
| 193 | unsigned long block_count; |
| 194 | unsigned long sector_size; |
| 195 | /* Page 0 data */ |
| 196 | unsigned char page_code; |
| 197 | unsigned char page_size; |
| 198 | unsigned char page_flags; |
| 199 | unsigned char qualifier; |
| 200 | } SCSI_SENSE_DATA; |
| 201 | |
| 202 | #define SCSI_CAPACITY(sd) ((sd).block_count & 0xffffff) |
| 203 | |
| 204 | |
| 205 | typedef union { |
| 206 | ATARI_SENSE_DATA atari; |
| 207 | SCSI_SENSE_DATA scsi; |
| 208 | } SENSE_DATA; |
| 209 | |
| 210 | #define SENSE_TYPE_UNKNOWN 0 |
| 211 | #define SENSE_TYPE_ATARI 1 |
| 212 | #define SENSE_TYPE_SCSI 2 |
| 213 | |
| 214 | #define SENSE_TYPE(sd) \ |
| 215 | (((sd).atari.dummy[0] == 8 && \ |
| 216 | ((sd).atari.format_code == 1 || \ |
| 217 | (sd).atari.format_code == 2)) ? SENSE_TYPE_ATARI : \ |
| 218 | ((sd).scsi.dummy1 >= 11) ? SENSE_TYPE_SCSI : \ |
| 219 | SENSE_TYPE_UNKNOWN) |
| 220 | |
| 221 | #define CAPACITY(sd) \ |
| 222 | (SENSE_TYPE(sd) == SENSE_TYPE_ATARI ? \ |
| 223 | ATARI_CAPACITY((sd).atari) : \ |
| 224 | SCSI_CAPACITY((sd).scsi)) |
| 225 | |
| 226 | #define SECTOR_SIZE(sd) \ |
| 227 | (SENSE_TYPE(sd) == SENSE_TYPE_ATARI ? \ |
| 228 | (sd).atari.sector_size : \ |
| 229 | (sd).scsi.sector_size & 0xffffff) |
| 230 | |
| 231 | /* Default size if capacity cannot be determined (1 GByte) */ |
| 232 | #define DEFAULT_SIZE 0x1fffff |
| 233 | |
| 234 | #define CARTRCH_STAT(aip,buf) \ |
| 235 | (aip->old_atari_disk ? \ |
| 236 | (((buf)[0] & 0x7f) == 0x28) : \ |
| 237 | ((((buf)[0] & 0x70) == 0x70) ? \ |
| 238 | (((buf)[2] & 0x0f) == 0x06) : \ |
| 239 | (((buf)[0] & 0x0f) == 0x06))) \ |
| 240 | |
| 241 | /* These two are also exported to other drivers that work on the ACSI bus and |
| 242 | * need an ST-RAM buffer. */ |
| 243 | char *acsi_buffer; |
| 244 | unsigned long phys_acsi_buffer; |
| 245 | |
| 246 | static int NDevices; |
| 247 | |
| 248 | static int CurrentNReq; |
| 249 | static int CurrentNSect; |
| 250 | static char *CurrentBuffer; |
| 251 | |
| 252 | static DEFINE_SPINLOCK(acsi_lock); |
| 253 | |
| 254 | |
| 255 | #define SET_TIMER() mod_timer(&acsi_timer, jiffies + ACSI_TIMEOUT) |
| 256 | #define CLEAR_TIMER() del_timer(&acsi_timer) |
| 257 | |
| 258 | static unsigned long STramMask; |
| 259 | #define STRAM_ADDR(a) (((a) & STramMask) == 0) |
| 260 | |
| 261 | |
| 262 | |
| 263 | /* ACSI commands */ |
| 264 | |
| 265 | static char tur_cmd[6] = { 0x00, 0, 0, 0, 0, 0 }; |
| 266 | static char modesense_cmd[6] = { 0x1a, 0, 0, 0, 24, 0 }; |
| 267 | static char modeselect_cmd[6] = { 0x15, 0, 0, 0, 12, 0 }; |
| 268 | static char inquiry_cmd[6] = { 0x12, 0, 0, 0,255, 0 }; |
| 269 | static char reqsense_cmd[6] = { 0x03, 0, 0, 0, 4, 0 }; |
| 270 | static char read_cmd[6] = { 0x08, 0, 0, 0, 0, 0 }; |
| 271 | static char write_cmd[6] = { 0x0a, 0, 0, 0, 0, 0 }; |
| 272 | static char pa_med_rem_cmd[6] = { 0x1e, 0, 0, 0, 0, 0 }; |
| 273 | |
| 274 | #define CMDSET_TARG_LUN(cmd,targ,lun) \ |
| 275 | do { \ |
| 276 | cmd[0] = (cmd[0] & ~0xe0) | (targ)<<5; \ |
| 277 | cmd[1] = (cmd[1] & ~0xe0) | (lun)<<5; \ |
| 278 | } while(0) |
| 279 | |
| 280 | #define CMDSET_BLOCK(cmd,blk) \ |
| 281 | do { \ |
| 282 | unsigned long __blk = (blk); \ |
| 283 | cmd[3] = __blk; __blk >>= 8; \ |
| 284 | cmd[2] = __blk; __blk >>= 8; \ |
| 285 | cmd[1] = (cmd[1] & 0xe0) | (__blk & 0x1f); \ |
| 286 | } while(0) |
| 287 | |
| 288 | #define CMDSET_LEN(cmd,len) \ |
| 289 | do { \ |
| 290 | cmd[4] = (len); \ |
| 291 | } while(0) |
| 292 | |
| 293 | /* ACSI errors (from REQUEST SENSE); There are two tables, one for the |
| 294 | * old Atari disks and one for SCSI on ACSI disks. |
| 295 | */ |
| 296 | |
| 297 | struct acsi_error { |
| 298 | unsigned char code; |
| 299 | const char *text; |
| 300 | } atari_acsi_errors[] = { |
| 301 | { 0x00, "No error (??)" }, |
| 302 | { 0x01, "No index pulses" }, |
| 303 | { 0x02, "Seek not complete" }, |
| 304 | { 0x03, "Write fault" }, |
| 305 | { 0x04, "Drive not ready" }, |
| 306 | { 0x06, "No Track 00 signal" }, |
| 307 | { 0x10, "ECC error in ID field" }, |
| 308 | { 0x11, "Uncorrectable data error" }, |
| 309 | { 0x12, "ID field address mark not found" }, |
| 310 | { 0x13, "Data field address mark not found" }, |
| 311 | { 0x14, "Record not found" }, |
| 312 | { 0x15, "Seek error" }, |
| 313 | { 0x18, "Data check in no retry mode" }, |
| 314 | { 0x19, "ECC error during verify" }, |
| 315 | { 0x1a, "Access to bad block" }, |
| 316 | { 0x1c, "Unformatted or bad format" }, |
| 317 | { 0x20, "Invalid command" }, |
| 318 | { 0x21, "Invalid block address" }, |
| 319 | { 0x23, "Volume overflow" }, |
| 320 | { 0x24, "Invalid argument" }, |
| 321 | { 0x25, "Invalid drive number" }, |
| 322 | { 0x26, "Byte zero parity check" }, |
| 323 | { 0x28, "Cartride changed" }, |
| 324 | { 0x2c, "Error count overflow" }, |
| 325 | { 0x30, "Controller selftest failed" } |
| 326 | }, |
| 327 | |
| 328 | scsi_acsi_errors[] = { |
| 329 | { 0x00, "No error (??)" }, |
| 330 | { 0x01, "Recovered error" }, |
| 331 | { 0x02, "Drive not ready" }, |
| 332 | { 0x03, "Uncorrectable medium error" }, |
| 333 | { 0x04, "Hardware error" }, |
| 334 | { 0x05, "Illegal request" }, |
| 335 | { 0x06, "Unit attention (Reset or cartridge changed)" }, |
| 336 | { 0x07, "Data protection" }, |
| 337 | { 0x08, "Blank check" }, |
| 338 | { 0x0b, "Aborted Command" }, |
| 339 | { 0x0d, "Volume overflow" } |
| 340 | }; |
| 341 | |
| 342 | |
| 343 | |
| 344 | /***************************** Prototypes *****************************/ |
| 345 | |
| 346 | static int acsicmd_dma( const char *cmd, char *buffer, int blocks, int |
| 347 | rwflag, int enable); |
| 348 | static int acsi_reqsense( char *buffer, int targ, int lun); |
| 349 | static void acsi_print_error(const unsigned char *errblk, struct acsi_info_struct *aip); |
| 350 | static irqreturn_t acsi_interrupt (int irq, void *data, struct pt_regs *fp); |
| 351 | static void unexpected_acsi_interrupt( void ); |
| 352 | static void bad_rw_intr( void ); |
| 353 | static void read_intr( void ); |
| 354 | static void write_intr( void); |
| 355 | static void acsi_times_out( unsigned long dummy ); |
| 356 | static void copy_to_acsibuffer( void ); |
| 357 | static void copy_from_acsibuffer( void ); |
| 358 | static void do_end_requests( void ); |
| 359 | static void do_acsi_request( request_queue_t * ); |
| 360 | static void redo_acsi_request( void ); |
| 361 | static int acsi_ioctl( struct inode *inode, struct file *file, unsigned int |
| 362 | cmd, unsigned long arg ); |
| 363 | static int acsi_open( struct inode * inode, struct file * filp ); |
| 364 | static int acsi_release( struct inode * inode, struct file * file ); |
| 365 | static void acsi_prevent_removal(struct acsi_info_struct *aip, int flag ); |
| 366 | static int acsi_change_blk_size( int target, int lun); |
| 367 | static int acsi_mode_sense( int target, int lun, SENSE_DATA *sd ); |
| 368 | static int acsi_revalidate (struct gendisk *disk); |
| 369 | |
| 370 | /************************* End of Prototypes **************************/ |
| 371 | |
| 372 | |
Ingo Molnar | 8d06afa | 2005-09-09 13:10:40 -0700 | [diff] [blame] | 373 | DEFINE_TIMER(acsi_timer, acsi_times_out, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | |
| 375 | |
| 376 | #ifdef CONFIG_ATARI_SLM |
| 377 | |
| 378 | extern int attach_slm( int target, int lun ); |
| 379 | extern int slm_init( void ); |
| 380 | |
| 381 | #endif |
| 382 | |
| 383 | |
| 384 | |
| 385 | /*********************************************************************** |
| 386 | * |
| 387 | * ACSI primitives |
| 388 | * |
| 389 | **********************************************************************/ |
| 390 | |
| 391 | |
| 392 | /* |
| 393 | * The following two functions wait for _IRQ to become Low or High, |
| 394 | * resp., with a timeout. The 'timeout' parameter is in jiffies |
| 395 | * (10ms). |
| 396 | * If the functions are called with timer interrupts on (int level < |
| 397 | * 6), the timeout is based on the 'jiffies' variable to provide exact |
| 398 | * timeouts for device probing etc. |
| 399 | * If interrupts are disabled, the number of tries is based on the |
| 400 | * 'loops_per_jiffy' variable. A rough estimation is sufficient here... |
| 401 | */ |
| 402 | |
| 403 | #define INT_LEVEL \ |
| 404 | ({ unsigned __sr; \ |
| 405 | __asm__ __volatile__ ( "movew %/sr,%0" : "=dm" (__sr) ); \ |
| 406 | (__sr >> 8) & 7; \ |
| 407 | }) |
| 408 | |
| 409 | int acsi_wait_for_IRQ( unsigned timeout ) |
| 410 | |
| 411 | { |
| 412 | if (INT_LEVEL < 6) { |
| 413 | unsigned long maxjif = jiffies + timeout; |
| 414 | while (time_before(jiffies, maxjif)) |
| 415 | if (!(mfp.par_dt_reg & 0x20)) return( 1 ); |
| 416 | } |
| 417 | else { |
| 418 | long tries = loops_per_jiffy / 8 * timeout; |
| 419 | while( --tries >= 0 ) |
| 420 | if (!(mfp.par_dt_reg & 0x20)) return( 1 ); |
| 421 | } |
| 422 | return( 0 ); /* timeout! */ |
| 423 | } |
| 424 | |
| 425 | |
| 426 | int acsi_wait_for_noIRQ( unsigned timeout ) |
| 427 | |
| 428 | { |
| 429 | if (INT_LEVEL < 6) { |
| 430 | unsigned long maxjif = jiffies + timeout; |
| 431 | while (time_before(jiffies, maxjif)) |
| 432 | if (mfp.par_dt_reg & 0x20) return( 1 ); |
| 433 | } |
| 434 | else { |
| 435 | long tries = loops_per_jiffy * timeout / 8; |
| 436 | while( tries-- >= 0 ) |
| 437 | if (mfp.par_dt_reg & 0x20) return( 1 ); |
| 438 | } |
| 439 | return( 0 ); /* timeout! */ |
| 440 | } |
| 441 | |
| 442 | static struct timeval start_time; |
| 443 | |
| 444 | void |
| 445 | acsi_delay_start(void) |
| 446 | { |
| 447 | do_gettimeofday(&start_time); |
| 448 | } |
| 449 | |
| 450 | /* wait from acsi_delay_start to now usec (<1E6) usec */ |
| 451 | |
| 452 | void |
| 453 | acsi_delay_end(long usec) |
| 454 | { |
| 455 | struct timeval end_time; |
| 456 | long deltau,deltas; |
| 457 | do_gettimeofday(&end_time); |
| 458 | deltau=end_time.tv_usec - start_time.tv_usec; |
| 459 | deltas=end_time.tv_sec - start_time.tv_sec; |
| 460 | if (deltas > 1 || deltas < 0) |
| 461 | return; |
| 462 | if (deltas > 0) |
| 463 | deltau += 1000*1000; |
| 464 | if (deltau >= usec) |
| 465 | return; |
| 466 | udelay(usec-deltau); |
| 467 | } |
| 468 | |
| 469 | /* acsicmd_dma() sends an ACSI command and sets up the DMA to transfer |
| 470 | * 'blocks' blocks of 512 bytes from/to 'buffer'. |
| 471 | * Because the _IRQ signal is used for handshaking the command bytes, |
| 472 | * the ACSI interrupt has to be disabled in this function. If the end |
| 473 | * of the operation should be signalled by a real interrupt, it has to be |
| 474 | * reenabled afterwards. |
| 475 | */ |
| 476 | |
| 477 | static int acsicmd_dma( const char *cmd, char *buffer, int blocks, int rwflag, int enable) |
| 478 | |
| 479 | { unsigned long flags, paddr; |
| 480 | int i; |
| 481 | |
| 482 | #ifdef NO_WRITE |
| 483 | if (rwflag || *cmd == 0x0a) { |
| 484 | printk( "ACSI: Write commands disabled!\n" ); |
| 485 | return( 0 ); |
| 486 | } |
| 487 | #endif |
| 488 | |
| 489 | rwflag = rwflag ? 0x100 : 0; |
| 490 | paddr = virt_to_phys( buffer ); |
| 491 | |
| 492 | acsi_delay_end(COMMAND_DELAY); |
| 493 | DISABLE_IRQ(); |
| 494 | |
| 495 | local_irq_save(flags); |
| 496 | /* Low on A1 */ |
| 497 | dma_wd.dma_mode_status = 0x88 | rwflag; |
| 498 | MFPDELAY(); |
| 499 | |
| 500 | /* set DMA address */ |
| 501 | dma_wd.dma_lo = (unsigned char)paddr; |
| 502 | paddr >>= 8; |
| 503 | MFPDELAY(); |
| 504 | dma_wd.dma_md = (unsigned char)paddr; |
| 505 | paddr >>= 8; |
| 506 | MFPDELAY(); |
| 507 | if (ATARIHW_PRESENT(EXTD_DMA)) |
| 508 | st_dma_ext_dmahi = (unsigned short)paddr; |
| 509 | else |
| 510 | dma_wd.dma_hi = (unsigned char)paddr; |
| 511 | MFPDELAY(); |
| 512 | local_irq_restore(flags); |
| 513 | |
| 514 | /* send the command bytes except the last */ |
| 515 | for( i = 0; i < 5; ++i ) { |
| 516 | DMA_LONG_WRITE( *cmd++, 0x8a | rwflag ); |
| 517 | udelay(20); |
| 518 | if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */ |
| 519 | } |
| 520 | |
| 521 | /* Clear FIFO and switch DMA to correct direction */ |
| 522 | dma_wd.dma_mode_status = 0x92 | (rwflag ^ 0x100); |
| 523 | MFPDELAY(); |
| 524 | dma_wd.dma_mode_status = 0x92 | rwflag; |
| 525 | MFPDELAY(); |
| 526 | |
| 527 | /* How many sectors for DMA */ |
| 528 | dma_wd.fdc_acces_seccount = blocks; |
| 529 | MFPDELAY(); |
| 530 | |
| 531 | /* send last command byte */ |
| 532 | dma_wd.dma_mode_status = 0x8a | rwflag; |
| 533 | MFPDELAY(); |
| 534 | DMA_LONG_WRITE( *cmd++, 0x0a | rwflag ); |
| 535 | if (enable) |
| 536 | ENABLE_IRQ(); |
| 537 | udelay(80); |
| 538 | |
| 539 | return( 1 ); |
| 540 | } |
| 541 | |
| 542 | |
| 543 | /* |
| 544 | * acsicmd_nodma() sends an ACSI command that requires no DMA. |
| 545 | */ |
| 546 | |
| 547 | int acsicmd_nodma( const char *cmd, int enable) |
| 548 | |
| 549 | { int i; |
| 550 | |
| 551 | acsi_delay_end(COMMAND_DELAY); |
| 552 | DISABLE_IRQ(); |
| 553 | |
| 554 | /* send first command byte */ |
| 555 | dma_wd.dma_mode_status = 0x88; |
| 556 | MFPDELAY(); |
| 557 | DMA_LONG_WRITE( *cmd++, 0x8a ); |
| 558 | udelay(20); |
| 559 | if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */ |
| 560 | |
| 561 | /* send the intermediate command bytes */ |
| 562 | for( i = 0; i < 4; ++i ) { |
| 563 | DMA_LONG_WRITE( *cmd++, 0x8a ); |
| 564 | udelay(20); |
| 565 | if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */ |
| 566 | } |
| 567 | |
| 568 | /* send last command byte */ |
| 569 | DMA_LONG_WRITE( *cmd++, 0x0a ); |
| 570 | if (enable) |
| 571 | ENABLE_IRQ(); |
| 572 | udelay(80); |
| 573 | |
| 574 | return( 1 ); |
| 575 | /* Note that the ACSI interrupt is still disabled after this |
| 576 | * function. If you want to get the IRQ delivered, enable it manually! |
| 577 | */ |
| 578 | } |
| 579 | |
| 580 | |
| 581 | static int acsi_reqsense( char *buffer, int targ, int lun) |
| 582 | |
| 583 | { |
| 584 | CMDSET_TARG_LUN( reqsense_cmd, targ, lun); |
| 585 | if (!acsicmd_dma( reqsense_cmd, buffer, 1, 0, 0 )) return( 0 ); |
| 586 | if (!acsi_wait_for_IRQ( 10 )) return( 0 ); |
| 587 | acsi_getstatus(); |
| 588 | if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 ); |
| 589 | if (!acsi_wait_for_IRQ( 10 )) return( 0 ); |
| 590 | acsi_getstatus(); |
| 591 | if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 ); |
| 592 | if (!acsi_wait_for_IRQ( 10 )) return( 0 ); |
| 593 | acsi_getstatus(); |
| 594 | if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 ); |
| 595 | if (!acsi_wait_for_IRQ( 10 )) return( 0 ); |
| 596 | acsi_getstatus(); |
| 597 | dma_cache_maintenance( virt_to_phys(buffer), 16, 0 ); |
| 598 | |
| 599 | return( 1 ); |
| 600 | } |
| 601 | |
| 602 | |
| 603 | /* |
| 604 | * ACSI status phase: get the status byte from the bus |
| 605 | * |
| 606 | * I've seen several times that a 0xff status is read, propably due to |
| 607 | * a timing error. In this case, the procedure is repeated after the |
| 608 | * next _IRQ edge. |
| 609 | */ |
| 610 | |
| 611 | int acsi_getstatus( void ) |
| 612 | |
| 613 | { int status; |
| 614 | |
| 615 | DISABLE_IRQ(); |
| 616 | for(;;) { |
| 617 | if (!acsi_wait_for_IRQ( 100 )) { |
| 618 | acsi_delay_start(); |
| 619 | return( -1 ); |
| 620 | } |
| 621 | dma_wd.dma_mode_status = 0x8a; |
| 622 | MFPDELAY(); |
| 623 | status = dma_wd.fdc_acces_seccount; |
| 624 | if (status != 0xff) break; |
| 625 | #ifdef DEBUG |
| 626 | printk("ACSI: skipping 0xff status byte\n" ); |
| 627 | #endif |
| 628 | udelay(40); |
| 629 | acsi_wait_for_noIRQ( 20 ); |
| 630 | } |
| 631 | dma_wd.dma_mode_status = 0x80; |
| 632 | udelay(40); |
| 633 | acsi_wait_for_noIRQ( 20 ); |
| 634 | |
| 635 | acsi_delay_start(); |
| 636 | return( status & 0x1f ); /* mask of the device# */ |
| 637 | } |
| 638 | |
| 639 | |
| 640 | #if (defined(CONFIG_ATARI_SLM) || defined(CONFIG_ATARI_SLM_MODULE)) |
| 641 | |
| 642 | /* Receive data in an extended status phase. Needed by SLM printer. */ |
| 643 | |
| 644 | int acsi_extstatus( char *buffer, int cnt ) |
| 645 | |
| 646 | { int status; |
| 647 | |
| 648 | DISABLE_IRQ(); |
| 649 | udelay(80); |
| 650 | while( cnt-- > 0 ) { |
| 651 | if (!acsi_wait_for_IRQ( 40 )) return( 0 ); |
| 652 | dma_wd.dma_mode_status = 0x8a; |
| 653 | MFPDELAY(); |
| 654 | status = dma_wd.fdc_acces_seccount; |
| 655 | MFPDELAY(); |
| 656 | *buffer++ = status & 0xff; |
| 657 | udelay(40); |
| 658 | } |
| 659 | return( 1 ); |
| 660 | } |
| 661 | |
| 662 | |
| 663 | /* Finish an extended status phase */ |
| 664 | |
| 665 | void acsi_end_extstatus( void ) |
| 666 | |
| 667 | { |
| 668 | dma_wd.dma_mode_status = 0x80; |
| 669 | udelay(40); |
| 670 | acsi_wait_for_noIRQ( 20 ); |
| 671 | acsi_delay_start(); |
| 672 | } |
| 673 | |
| 674 | |
| 675 | /* Send data in an extended command phase */ |
| 676 | |
| 677 | int acsi_extcmd( unsigned char *buffer, int cnt ) |
| 678 | |
| 679 | { |
| 680 | while( cnt-- > 0 ) { |
| 681 | DMA_LONG_WRITE( *buffer++, 0x8a ); |
| 682 | udelay(20); |
| 683 | if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */ |
| 684 | } |
| 685 | return( 1 ); |
| 686 | } |
| 687 | |
| 688 | #endif |
| 689 | |
| 690 | |
| 691 | static void acsi_print_error(const unsigned char *errblk, struct acsi_info_struct *aip) |
| 692 | |
| 693 | { int atari_err, i, errcode; |
| 694 | struct acsi_error *arr; |
| 695 | |
| 696 | atari_err = aip->old_atari_disk; |
| 697 | if (atari_err) |
| 698 | errcode = errblk[0] & 0x7f; |
| 699 | else |
| 700 | if ((errblk[0] & 0x70) == 0x70) |
| 701 | errcode = errblk[2] & 0x0f; |
| 702 | else |
| 703 | errcode = errblk[0] & 0x0f; |
| 704 | |
| 705 | printk( KERN_ERR "ACSI error 0x%02x", errcode ); |
| 706 | |
| 707 | if (errblk[0] & 0x80) |
| 708 | printk( " for sector %d", |
| 709 | ((errblk[1] & 0x1f) << 16) | |
| 710 | (errblk[2] << 8) | errblk[0] ); |
| 711 | |
| 712 | arr = atari_err ? atari_acsi_errors : scsi_acsi_errors; |
| 713 | i = atari_err ? sizeof(atari_acsi_errors)/sizeof(*atari_acsi_errors) : |
| 714 | sizeof(scsi_acsi_errors)/sizeof(*scsi_acsi_errors); |
| 715 | |
| 716 | for( --i; i >= 0; --i ) |
| 717 | if (arr[i].code == errcode) break; |
| 718 | if (i >= 0) |
| 719 | printk( ": %s\n", arr[i].text ); |
| 720 | } |
| 721 | |
| 722 | /******************************************************************* |
| 723 | * |
| 724 | * ACSI interrupt routine |
| 725 | * Test, if this is a ACSI interrupt and call the irq handler |
| 726 | * Otherwise ignore this interrupt. |
| 727 | * |
| 728 | *******************************************************************/ |
| 729 | |
| 730 | static irqreturn_t acsi_interrupt(int irq, void *data, struct pt_regs *fp ) |
| 731 | |
| 732 | { void (*acsi_irq_handler)(void) = do_acsi; |
| 733 | |
| 734 | do_acsi = NULL; |
| 735 | CLEAR_TIMER(); |
| 736 | |
| 737 | if (!acsi_irq_handler) |
| 738 | acsi_irq_handler = unexpected_acsi_interrupt; |
| 739 | acsi_irq_handler(); |
| 740 | return IRQ_HANDLED; |
| 741 | } |
| 742 | |
| 743 | |
| 744 | /****************************************************************** |
| 745 | * |
| 746 | * The Interrupt handlers |
| 747 | * |
| 748 | *******************************************************************/ |
| 749 | |
| 750 | |
| 751 | static void unexpected_acsi_interrupt( void ) |
| 752 | |
| 753 | { |
| 754 | printk( KERN_WARNING "Unexpected ACSI interrupt\n" ); |
| 755 | } |
| 756 | |
| 757 | |
| 758 | /* This function is called in case of errors. Because we cannot reset |
| 759 | * the ACSI bus or a single device, there is no other choice than |
| 760 | * retrying several times :-( |
| 761 | */ |
| 762 | |
| 763 | static void bad_rw_intr( void ) |
| 764 | |
| 765 | { |
| 766 | if (!CURRENT) |
| 767 | return; |
| 768 | |
| 769 | if (++CURRENT->errors >= MAX_ERRORS) |
| 770 | end_request(CURRENT, 0); |
| 771 | /* Otherwise just retry */ |
| 772 | } |
| 773 | |
| 774 | |
| 775 | static void read_intr( void ) |
| 776 | |
| 777 | { int status; |
| 778 | |
| 779 | status = acsi_getstatus(); |
| 780 | if (status != 0) { |
| 781 | struct gendisk *disk = CURRENT->rq_disk; |
| 782 | struct acsi_info_struct *aip = disk->private_data; |
| 783 | printk(KERN_ERR "%s: ", disk->disk_name); |
| 784 | if (!acsi_reqsense(acsi_buffer, aip->target, aip->lun)) |
| 785 | printk( "ACSI error and REQUEST SENSE failed (status=0x%02x)\n", status ); |
| 786 | else { |
| 787 | acsi_print_error(acsi_buffer, aip); |
| 788 | if (CARTRCH_STAT(aip, acsi_buffer)) |
| 789 | aip->changed = 1; |
| 790 | } |
| 791 | ENABLE_IRQ(); |
| 792 | bad_rw_intr(); |
| 793 | redo_acsi_request(); |
| 794 | return; |
| 795 | } |
| 796 | |
| 797 | dma_cache_maintenance( virt_to_phys(CurrentBuffer), CurrentNSect*512, 0 ); |
| 798 | if (CurrentBuffer == acsi_buffer) |
| 799 | copy_from_acsibuffer(); |
| 800 | |
| 801 | do_end_requests(); |
| 802 | redo_acsi_request(); |
| 803 | } |
| 804 | |
| 805 | |
| 806 | static void write_intr(void) |
| 807 | |
| 808 | { int status; |
| 809 | |
| 810 | status = acsi_getstatus(); |
| 811 | if (status != 0) { |
| 812 | struct gendisk *disk = CURRENT->rq_disk; |
| 813 | struct acsi_info_struct *aip = disk->private_data; |
| 814 | printk( KERN_ERR "%s: ", disk->disk_name); |
| 815 | if (!acsi_reqsense( acsi_buffer, aip->target, aip->lun)) |
| 816 | printk( "ACSI error and REQUEST SENSE failed (status=0x%02x)\n", status ); |
| 817 | else { |
| 818 | acsi_print_error(acsi_buffer, aip); |
| 819 | if (CARTRCH_STAT(aip, acsi_buffer)) |
| 820 | aip->changed = 1; |
| 821 | } |
| 822 | bad_rw_intr(); |
| 823 | redo_acsi_request(); |
| 824 | return; |
| 825 | } |
| 826 | |
| 827 | do_end_requests(); |
| 828 | redo_acsi_request(); |
| 829 | } |
| 830 | |
| 831 | |
| 832 | static void acsi_times_out( unsigned long dummy ) |
| 833 | |
| 834 | { |
| 835 | DISABLE_IRQ(); |
| 836 | if (!do_acsi) return; |
| 837 | |
| 838 | do_acsi = NULL; |
| 839 | printk( KERN_ERR "ACSI timeout\n" ); |
| 840 | if (!CURRENT) |
| 841 | return; |
| 842 | if (++CURRENT->errors >= MAX_ERRORS) { |
| 843 | #ifdef DEBUG |
| 844 | printk( KERN_ERR "ACSI: too many errors.\n" ); |
| 845 | #endif |
| 846 | end_request(CURRENT, 0); |
| 847 | } |
| 848 | |
| 849 | redo_acsi_request(); |
| 850 | } |
| 851 | |
| 852 | |
| 853 | |
| 854 | /*********************************************************************** |
| 855 | * |
| 856 | * Scatter-gather utility functions |
| 857 | * |
| 858 | ***********************************************************************/ |
| 859 | |
| 860 | |
| 861 | static void copy_to_acsibuffer( void ) |
| 862 | |
| 863 | { int i; |
| 864 | char *src, *dst; |
| 865 | struct buffer_head *bh; |
| 866 | |
| 867 | src = CURRENT->buffer; |
| 868 | dst = acsi_buffer; |
| 869 | bh = CURRENT->bh; |
| 870 | |
| 871 | if (!bh) |
| 872 | memcpy( dst, src, CurrentNSect*512 ); |
| 873 | else |
| 874 | for( i = 0; i < CurrentNReq; ++i ) { |
| 875 | memcpy( dst, src, bh->b_size ); |
| 876 | dst += bh->b_size; |
| 877 | if ((bh = bh->b_reqnext)) |
| 878 | src = bh->b_data; |
| 879 | } |
| 880 | } |
| 881 | |
| 882 | |
| 883 | static void copy_from_acsibuffer( void ) |
| 884 | |
| 885 | { int i; |
| 886 | char *src, *dst; |
| 887 | struct buffer_head *bh; |
| 888 | |
| 889 | dst = CURRENT->buffer; |
| 890 | src = acsi_buffer; |
| 891 | bh = CURRENT->bh; |
| 892 | |
| 893 | if (!bh) |
| 894 | memcpy( dst, src, CurrentNSect*512 ); |
| 895 | else |
| 896 | for( i = 0; i < CurrentNReq; ++i ) { |
| 897 | memcpy( dst, src, bh->b_size ); |
| 898 | src += bh->b_size; |
| 899 | if ((bh = bh->b_reqnext)) |
| 900 | dst = bh->b_data; |
| 901 | } |
| 902 | } |
| 903 | |
| 904 | |
| 905 | static void do_end_requests( void ) |
| 906 | |
| 907 | { int i, n; |
| 908 | |
| 909 | if (!CURRENT->bh) { |
| 910 | CURRENT->nr_sectors -= CurrentNSect; |
| 911 | CURRENT->current_nr_sectors -= CurrentNSect; |
| 912 | CURRENT->sector += CurrentNSect; |
| 913 | if (CURRENT->nr_sectors == 0) |
| 914 | end_request(CURRENT, 1); |
| 915 | } |
| 916 | else { |
| 917 | for( i = 0; i < CurrentNReq; ++i ) { |
| 918 | n = CURRENT->bh->b_size >> 9; |
| 919 | CURRENT->nr_sectors -= n; |
| 920 | CURRENT->current_nr_sectors -= n; |
| 921 | CURRENT->sector += n; |
| 922 | end_request(CURRENT, 1); |
| 923 | } |
| 924 | } |
| 925 | } |
| 926 | |
| 927 | |
| 928 | |
| 929 | |
| 930 | /*********************************************************************** |
| 931 | * |
| 932 | * do_acsi_request and friends |
| 933 | * |
| 934 | ***********************************************************************/ |
| 935 | |
| 936 | static void do_acsi_request( request_queue_t * q ) |
| 937 | |
| 938 | { |
| 939 | stdma_lock( acsi_interrupt, NULL ); |
| 940 | redo_acsi_request(); |
| 941 | } |
| 942 | |
| 943 | |
| 944 | static void redo_acsi_request( void ) |
| 945 | { |
| 946 | unsigned block, target, lun, nsect; |
| 947 | char *buffer; |
| 948 | unsigned long pbuffer; |
| 949 | struct buffer_head *bh; |
| 950 | struct gendisk *disk; |
| 951 | struct acsi_info_struct *aip; |
| 952 | |
| 953 | repeat: |
| 954 | CLEAR_TIMER(); |
| 955 | |
| 956 | if (do_acsi) |
| 957 | return; |
| 958 | |
| 959 | if (!CURRENT) { |
| 960 | do_acsi = NULL; |
| 961 | ENABLE_IRQ(); |
| 962 | stdma_release(); |
| 963 | return; |
| 964 | } |
| 965 | |
| 966 | disk = CURRENT->rq_disk; |
| 967 | aip = disk->private_data; |
| 968 | if (CURRENT->bh) { |
| 969 | if (!CURRENT->bh && !buffer_locked(CURRENT->bh)) |
| 970 | panic("ACSI: block not locked"); |
| 971 | } |
| 972 | |
| 973 | block = CURRENT->sector; |
| 974 | if (block+CURRENT->nr_sectors >= get_capacity(disk)) { |
| 975 | #ifdef DEBUG |
| 976 | printk( "%s: attempted access for blocks %d...%ld past end of device at block %ld.\n", |
| 977 | disk->disk_name, |
| 978 | block, block + CURRENT->nr_sectors - 1, |
| 979 | get_capacity(disk)); |
| 980 | #endif |
| 981 | end_request(CURRENT, 0); |
| 982 | goto repeat; |
| 983 | } |
| 984 | if (aip->changed) { |
| 985 | printk( KERN_NOTICE "%s: request denied because cartridge has " |
| 986 | "been changed.\n", disk->disk_name); |
| 987 | end_request(CURRENT, 0); |
| 988 | goto repeat; |
| 989 | } |
| 990 | |
| 991 | target = aip->target; |
| 992 | lun = aip->lun; |
| 993 | |
| 994 | /* Find out how many sectors should be transferred from/to |
| 995 | * consecutive buffers and thus can be done with a single command. |
| 996 | */ |
| 997 | buffer = CURRENT->buffer; |
| 998 | pbuffer = virt_to_phys(buffer); |
| 999 | nsect = CURRENT->current_nr_sectors; |
| 1000 | CurrentNReq = 1; |
| 1001 | |
| 1002 | if ((bh = CURRENT->bh) && bh != CURRENT->bhtail) { |
| 1003 | if (!STRAM_ADDR(pbuffer)) { |
| 1004 | /* If transfer is done via the ACSI buffer anyway, we can |
| 1005 | * assemble as much bh's as fit in the buffer. |
| 1006 | */ |
| 1007 | while( (bh = bh->b_reqnext) ) { |
| 1008 | if (nsect + (bh->b_size>>9) > ACSI_BUFFER_SECTORS) break; |
| 1009 | nsect += bh->b_size >> 9; |
| 1010 | ++CurrentNReq; |
| 1011 | if (bh == CURRENT->bhtail) break; |
| 1012 | } |
| 1013 | buffer = acsi_buffer; |
| 1014 | pbuffer = phys_acsi_buffer; |
| 1015 | } |
| 1016 | else { |
| 1017 | unsigned long pendadr, pnewadr; |
| 1018 | pendadr = pbuffer + nsect*512; |
| 1019 | while( (bh = bh->b_reqnext) ) { |
| 1020 | pnewadr = virt_to_phys(bh->b_data); |
| 1021 | if (!STRAM_ADDR(pnewadr) || pendadr != pnewadr) break; |
| 1022 | nsect += bh->b_size >> 9; |
| 1023 | pendadr = pnewadr + bh->b_size; |
| 1024 | ++CurrentNReq; |
| 1025 | if (bh == CURRENT->bhtail) break; |
| 1026 | } |
| 1027 | } |
| 1028 | } |
| 1029 | else { |
| 1030 | if (!STRAM_ADDR(pbuffer)) { |
| 1031 | buffer = acsi_buffer; |
| 1032 | pbuffer = phys_acsi_buffer; |
| 1033 | if (nsect > ACSI_BUFFER_SECTORS) |
| 1034 | nsect = ACSI_BUFFER_SECTORS; |
| 1035 | } |
| 1036 | } |
| 1037 | CurrentBuffer = buffer; |
| 1038 | CurrentNSect = nsect; |
| 1039 | |
| 1040 | if (rq_data_dir(CURRENT) == WRITE) { |
| 1041 | CMDSET_TARG_LUN( write_cmd, target, lun ); |
| 1042 | CMDSET_BLOCK( write_cmd, block ); |
| 1043 | CMDSET_LEN( write_cmd, nsect ); |
| 1044 | if (buffer == acsi_buffer) |
| 1045 | copy_to_acsibuffer(); |
| 1046 | dma_cache_maintenance( pbuffer, nsect*512, 1 ); |
| 1047 | do_acsi = write_intr; |
| 1048 | if (!acsicmd_dma( write_cmd, buffer, nsect, 1, 1)) { |
| 1049 | do_acsi = NULL; |
| 1050 | printk( KERN_ERR "ACSI (write): Timeout in command block\n" ); |
| 1051 | bad_rw_intr(); |
| 1052 | goto repeat; |
| 1053 | } |
| 1054 | SET_TIMER(); |
| 1055 | return; |
| 1056 | } |
| 1057 | if (rq_data_dir(CURRENT) == READ) { |
| 1058 | CMDSET_TARG_LUN( read_cmd, target, lun ); |
| 1059 | CMDSET_BLOCK( read_cmd, block ); |
| 1060 | CMDSET_LEN( read_cmd, nsect ); |
| 1061 | do_acsi = read_intr; |
| 1062 | if (!acsicmd_dma( read_cmd, buffer, nsect, 0, 1)) { |
| 1063 | do_acsi = NULL; |
| 1064 | printk( KERN_ERR "ACSI (read): Timeout in command block\n" ); |
| 1065 | bad_rw_intr(); |
| 1066 | goto repeat; |
| 1067 | } |
| 1068 | SET_TIMER(); |
| 1069 | return; |
| 1070 | } |
| 1071 | panic("unknown ACSI command"); |
| 1072 | } |
| 1073 | |
| 1074 | |
| 1075 | |
| 1076 | /*********************************************************************** |
| 1077 | * |
| 1078 | * Misc functions: ioctl, open, release, check_change, ... |
| 1079 | * |
| 1080 | ***********************************************************************/ |
| 1081 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame^] | 1082 | static int acsi_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
| 1083 | { |
| 1084 | struct acsi_info_struct *aip = bdev->bd_disk->private_data; |
| 1085 | |
| 1086 | /* |
| 1087 | * Just fake some geometry here, it's nonsense anyway |
| 1088 | * To make it easy, use Adaptec's usual 64/32 mapping |
| 1089 | */ |
| 1090 | geo->heads = 64; |
| 1091 | geo->sectors = 32; |
| 1092 | geo->cylinders = aip->size >> 11; |
| 1093 | return 0; |
| 1094 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | |
| 1096 | static int acsi_ioctl( struct inode *inode, struct file *file, |
| 1097 | unsigned int cmd, unsigned long arg ) |
| 1098 | { |
| 1099 | struct gendisk *disk = inode->i_bdev->bd_disk; |
| 1100 | struct acsi_info_struct *aip = disk->private_data; |
| 1101 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | case SCSI_IOCTL_GET_IDLUN: |
| 1103 | /* SCSI compatible GET_IDLUN call to get target's ID and LUN number */ |
| 1104 | put_user( aip->target | (aip->lun << 8), |
| 1105 | &((Scsi_Idlun *) arg)->dev_id ); |
| 1106 | put_user( 0, &((Scsi_Idlun *) arg)->host_unique_id ); |
| 1107 | return 0; |
| 1108 | default: |
| 1109 | return -EINVAL; |
| 1110 | } |
| 1111 | } |
| 1112 | |
| 1113 | |
| 1114 | /* |
| 1115 | * Open a device, check for read-only and lock the medium if it is |
| 1116 | * removable. |
| 1117 | * |
| 1118 | * Changes by Martin Rogge, 9th Aug 1995: |
| 1119 | * Check whether check_disk_change (and therefore revalidate_acsidisk) |
| 1120 | * was successful. They fail when there is no medium in the drive. |
| 1121 | * |
| 1122 | * The problem of media being changed during an operation can be |
| 1123 | * ignored because of the prevent_removal code. |
| 1124 | * |
| 1125 | * Added check for the validity of the device number. |
| 1126 | * |
| 1127 | */ |
| 1128 | |
| 1129 | static int acsi_open( struct inode * inode, struct file * filp ) |
| 1130 | { |
| 1131 | struct gendisk *disk = inode->i_bdev->bd_disk; |
| 1132 | struct acsi_info_struct *aip = disk->private_data; |
| 1133 | |
| 1134 | if (aip->access_count == 0 && aip->removable) { |
| 1135 | #if 0 |
| 1136 | aip->changed = 1; /* safety first */ |
| 1137 | #endif |
| 1138 | check_disk_change( inode->i_bdev ); |
| 1139 | if (aip->changed) /* revalidate was not successful (no medium) */ |
| 1140 | return -ENXIO; |
| 1141 | acsi_prevent_removal(aip, 1); |
| 1142 | } |
| 1143 | aip->access_count++; |
| 1144 | |
| 1145 | if (filp && filp->f_mode) { |
| 1146 | check_disk_change( inode->i_bdev ); |
| 1147 | if (filp->f_mode & 2) { |
| 1148 | if (aip->read_only) { |
| 1149 | acsi_release( inode, filp ); |
| 1150 | return -EROFS; |
| 1151 | } |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | /* |
| 1159 | * Releasing a block device means we sync() it, so that it can safely |
| 1160 | * be forgotten about... |
| 1161 | */ |
| 1162 | |
| 1163 | static int acsi_release( struct inode * inode, struct file * file ) |
| 1164 | { |
| 1165 | struct gendisk *disk = inode->i_bdev->bd_disk; |
| 1166 | struct acsi_info_struct *aip = disk->private_data; |
| 1167 | if (--aip->access_count == 0 && aip->removable) |
| 1168 | acsi_prevent_removal(aip, 0); |
| 1169 | return( 0 ); |
| 1170 | } |
| 1171 | |
| 1172 | /* |
| 1173 | * Prevent or allow a media change for removable devices. |
| 1174 | */ |
| 1175 | |
| 1176 | static void acsi_prevent_removal(struct acsi_info_struct *aip, int flag) |
| 1177 | { |
| 1178 | stdma_lock( NULL, NULL ); |
| 1179 | |
| 1180 | CMDSET_TARG_LUN(pa_med_rem_cmd, aip->target, aip->lun); |
| 1181 | CMDSET_LEN( pa_med_rem_cmd, flag ); |
| 1182 | |
| 1183 | if (acsicmd_nodma(pa_med_rem_cmd, 0) && acsi_wait_for_IRQ(3*HZ)) |
| 1184 | acsi_getstatus(); |
| 1185 | /* Do not report errors -- some devices may not know this command. */ |
| 1186 | |
| 1187 | ENABLE_IRQ(); |
| 1188 | stdma_release(); |
| 1189 | } |
| 1190 | |
| 1191 | static int acsi_media_change(struct gendisk *disk) |
| 1192 | { |
| 1193 | struct acsi_info_struct *aip = disk->private_data; |
| 1194 | |
| 1195 | if (!aip->removable) |
| 1196 | return 0; |
| 1197 | |
| 1198 | if (aip->changed) |
| 1199 | /* We can be sure that the medium has been changed -- REQUEST |
| 1200 | * SENSE has reported this earlier. |
| 1201 | */ |
| 1202 | return 1; |
| 1203 | |
| 1204 | /* If the flag isn't set, make a test by reading block 0. |
| 1205 | * If errors happen, it seems to be better to say "changed"... |
| 1206 | */ |
| 1207 | stdma_lock( NULL, NULL ); |
| 1208 | CMDSET_TARG_LUN(read_cmd, aip->target, aip->lun); |
| 1209 | CMDSET_BLOCK( read_cmd, 0 ); |
| 1210 | CMDSET_LEN( read_cmd, 1 ); |
| 1211 | if (acsicmd_dma(read_cmd, acsi_buffer, 1, 0, 0) && |
| 1212 | acsi_wait_for_IRQ(3*HZ)) { |
| 1213 | if (acsi_getstatus()) { |
| 1214 | if (acsi_reqsense(acsi_buffer, aip->target, aip->lun)) { |
| 1215 | if (CARTRCH_STAT(aip, acsi_buffer)) |
| 1216 | aip->changed = 1; |
| 1217 | } |
| 1218 | else { |
| 1219 | printk( KERN_ERR "%s: REQUEST SENSE failed in test for " |
| 1220 | "medium change; assuming a change\n", disk->disk_name ); |
| 1221 | aip->changed = 1; |
| 1222 | } |
| 1223 | } |
| 1224 | } |
| 1225 | else { |
| 1226 | printk( KERN_ERR "%s: Test for medium changed timed out; " |
| 1227 | "assuming a change\n", disk->disk_name); |
| 1228 | aip->changed = 1; |
| 1229 | } |
| 1230 | ENABLE_IRQ(); |
| 1231 | stdma_release(); |
| 1232 | |
| 1233 | /* Now, after reading a block, the changed status is surely valid. */ |
| 1234 | return aip->changed; |
| 1235 | } |
| 1236 | |
| 1237 | |
| 1238 | static int acsi_change_blk_size( int target, int lun) |
| 1239 | |
| 1240 | { int i; |
| 1241 | |
| 1242 | for (i=0; i<12; i++) |
| 1243 | acsi_buffer[i] = 0; |
| 1244 | |
| 1245 | acsi_buffer[3] = 8; |
| 1246 | acsi_buffer[10] = 2; |
| 1247 | CMDSET_TARG_LUN( modeselect_cmd, target, lun); |
| 1248 | |
| 1249 | if (!acsicmd_dma( modeselect_cmd, acsi_buffer, 1,1,0) || |
| 1250 | !acsi_wait_for_IRQ( 3*HZ ) || |
| 1251 | acsi_getstatus() != 0 ) { |
| 1252 | return(0); |
| 1253 | } |
| 1254 | return(1); |
| 1255 | } |
| 1256 | |
| 1257 | |
| 1258 | static int acsi_mode_sense( int target, int lun, SENSE_DATA *sd ) |
| 1259 | |
| 1260 | { |
| 1261 | int page; |
| 1262 | |
| 1263 | CMDSET_TARG_LUN( modesense_cmd, target, lun ); |
| 1264 | for (page=0; page<4; page++) { |
| 1265 | modesense_cmd[2] = page; |
| 1266 | if (!acsicmd_dma( modesense_cmd, acsi_buffer, 1, 0, 0 ) || |
| 1267 | !acsi_wait_for_IRQ( 3*HZ ) || |
| 1268 | acsi_getstatus()) |
| 1269 | continue; |
| 1270 | |
| 1271 | /* read twice to jump over the second 16-byte border! */ |
| 1272 | udelay(300); |
| 1273 | if (acsi_wait_for_noIRQ( 20 ) && |
| 1274 | acsicmd_nodma( modesense_cmd, 0 ) && |
| 1275 | acsi_wait_for_IRQ( 3*HZ ) && |
| 1276 | acsi_getstatus() == 0) |
| 1277 | break; |
| 1278 | } |
| 1279 | if (page == 4) { |
| 1280 | return(0); |
| 1281 | } |
| 1282 | |
| 1283 | dma_cache_maintenance( phys_acsi_buffer, sizeof(SENSE_DATA), 0 ); |
| 1284 | *sd = *(SENSE_DATA *)acsi_buffer; |
| 1285 | |
| 1286 | /* Validity check, depending on type of data */ |
| 1287 | |
| 1288 | switch( SENSE_TYPE(*sd) ) { |
| 1289 | |
| 1290 | case SENSE_TYPE_ATARI: |
| 1291 | if (CAPACITY(*sd) == 0) |
| 1292 | goto invalid_sense; |
| 1293 | break; |
| 1294 | |
| 1295 | case SENSE_TYPE_SCSI: |
| 1296 | if (sd->scsi.descriptor_size != 8) |
| 1297 | goto invalid_sense; |
| 1298 | break; |
| 1299 | |
| 1300 | case SENSE_TYPE_UNKNOWN: |
| 1301 | |
| 1302 | printk( KERN_ERR "ACSI target %d, lun %d: Cannot interpret " |
| 1303 | "sense data\n", target, lun ); |
| 1304 | |
| 1305 | invalid_sense: |
| 1306 | |
| 1307 | #ifdef DEBUG |
| 1308 | { int i; |
| 1309 | printk( "Mode sense data for ACSI target %d, lun %d seem not valid:", |
| 1310 | target, lun ); |
| 1311 | for( i = 0; i < sizeof(SENSE_DATA); ++i ) |
| 1312 | printk( "%02x ", (unsigned char)acsi_buffer[i] ); |
| 1313 | printk( "\n" ); |
| 1314 | } |
| 1315 | #endif |
| 1316 | return( 0 ); |
| 1317 | } |
| 1318 | |
| 1319 | return( 1 ); |
| 1320 | } |
| 1321 | |
| 1322 | |
| 1323 | |
| 1324 | /******************************************************************* |
| 1325 | * |
| 1326 | * Initialization |
| 1327 | * |
| 1328 | ********************************************************************/ |
| 1329 | |
| 1330 | |
| 1331 | extern struct block_device_operations acsi_fops; |
| 1332 | |
| 1333 | static struct gendisk *acsi_gendisk[MAX_DEV]; |
| 1334 | |
| 1335 | #define MAX_SCSI_DEVICE_CODE 10 |
| 1336 | |
| 1337 | static const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE] = |
| 1338 | { |
| 1339 | "Direct-Access ", |
| 1340 | "Sequential-Access", |
| 1341 | "Printer ", |
| 1342 | "Processor ", |
| 1343 | "WORM ", |
| 1344 | "CD-ROM ", |
| 1345 | "Scanner ", |
| 1346 | "Optical Device ", |
| 1347 | "Medium Changer ", |
| 1348 | "Communications " |
| 1349 | }; |
| 1350 | |
| 1351 | static void print_inquiry(unsigned char *data) |
| 1352 | { |
| 1353 | int i; |
| 1354 | |
| 1355 | printk(KERN_INFO " Vendor: "); |
| 1356 | for (i = 8; i < 16; i++) |
| 1357 | { |
| 1358 | if (data[i] >= 0x20 && i < data[4] + 5) |
| 1359 | printk("%c", data[i]); |
| 1360 | else |
| 1361 | printk(" "); |
| 1362 | } |
| 1363 | |
| 1364 | printk(" Model: "); |
| 1365 | for (i = 16; i < 32; i++) |
| 1366 | { |
| 1367 | if (data[i] >= 0x20 && i < data[4] + 5) |
| 1368 | printk("%c", data[i]); |
| 1369 | else |
| 1370 | printk(" "); |
| 1371 | } |
| 1372 | |
| 1373 | printk(" Rev: "); |
| 1374 | for (i = 32; i < 36; i++) |
| 1375 | { |
| 1376 | if (data[i] >= 0x20 && i < data[4] + 5) |
| 1377 | printk("%c", data[i]); |
| 1378 | else |
| 1379 | printk(" "); |
| 1380 | } |
| 1381 | |
| 1382 | printk("\n"); |
| 1383 | |
| 1384 | i = data[0] & 0x1f; |
| 1385 | |
| 1386 | printk(KERN_INFO " Type: %s ", (i < MAX_SCSI_DEVICE_CODE |
| 1387 | ? scsi_device_types[i] |
| 1388 | : "Unknown ")); |
| 1389 | printk(" ANSI SCSI revision: %02x", data[2] & 0x07); |
| 1390 | if ((data[2] & 0x07) == 1 && (data[3] & 0x0f) == 1) |
| 1391 | printk(" CCS\n"); |
| 1392 | else |
| 1393 | printk("\n"); |
| 1394 | } |
| 1395 | |
| 1396 | |
| 1397 | /* |
| 1398 | * Changes by Martin Rogge, 9th Aug 1995: |
| 1399 | * acsi_devinit has been taken out of acsi_geninit, because it needs |
| 1400 | * to be called from revalidate_acsidisk. The result of request sense |
| 1401 | * is now checked for DRIVE NOT READY. |
| 1402 | * |
| 1403 | * The structure *aip is only valid when acsi_devinit returns |
| 1404 | * DEV_SUPPORTED. |
| 1405 | * |
| 1406 | */ |
| 1407 | |
| 1408 | #define DEV_NONE 0 |
| 1409 | #define DEV_UNKNOWN 1 |
| 1410 | #define DEV_SUPPORTED 2 |
| 1411 | #define DEV_SLM 3 |
| 1412 | |
| 1413 | static int acsi_devinit(struct acsi_info_struct *aip) |
| 1414 | { |
| 1415 | int status, got_inquiry; |
| 1416 | SENSE_DATA sense; |
| 1417 | unsigned char reqsense, extsense; |
| 1418 | |
| 1419 | /*****************************************************************/ |
| 1420 | /* Do a TEST UNIT READY command to test the presence of a device */ |
| 1421 | /*****************************************************************/ |
| 1422 | |
| 1423 | CMDSET_TARG_LUN(tur_cmd, aip->target, aip->lun); |
| 1424 | if (!acsicmd_nodma(tur_cmd, 0)) { |
| 1425 | /* timed out -> no device here */ |
| 1426 | #ifdef DEBUG_DETECT |
| 1427 | printk("target %d lun %d: timeout\n", aip->target, aip->lun); |
| 1428 | #endif |
| 1429 | return DEV_NONE; |
| 1430 | } |
| 1431 | |
| 1432 | /*************************/ |
| 1433 | /* Read the ACSI status. */ |
| 1434 | /*************************/ |
| 1435 | |
| 1436 | status = acsi_getstatus(); |
| 1437 | if (status) { |
| 1438 | if (status == 0x12) { |
| 1439 | /* The SLM printer should be the only device that |
| 1440 | * responds with the error code in the status byte. In |
| 1441 | * correct status bytes, bit 4 is never set. |
| 1442 | */ |
| 1443 | printk( KERN_INFO "Detected SLM printer at id %d lun %d\n", |
| 1444 | aip->target, aip->lun); |
| 1445 | return DEV_SLM; |
| 1446 | } |
| 1447 | /* ignore CHECK CONDITION, since some devices send a |
| 1448 | UNIT ATTENTION */ |
| 1449 | if ((status & 0x1e) != 0x2) { |
| 1450 | #ifdef DEBUG_DETECT |
| 1451 | printk("target %d lun %d: status %d\n", |
| 1452 | aip->target, aip->lun, status); |
| 1453 | #endif |
| 1454 | return DEV_UNKNOWN; |
| 1455 | } |
| 1456 | } |
| 1457 | |
| 1458 | /*******************************/ |
| 1459 | /* Do a REQUEST SENSE command. */ |
| 1460 | /*******************************/ |
| 1461 | |
| 1462 | if (!acsi_reqsense(acsi_buffer, aip->target, aip->lun)) { |
| 1463 | printk( KERN_WARNING "acsi_reqsense failed\n"); |
| 1464 | acsi_buffer[0] = 0; |
| 1465 | acsi_buffer[2] = UNIT_ATTENTION; |
| 1466 | } |
| 1467 | reqsense = acsi_buffer[0]; |
| 1468 | extsense = acsi_buffer[2] & 0xf; |
| 1469 | if (status) { |
| 1470 | if ((reqsense & 0x70) == 0x70) { /* extended sense */ |
| 1471 | if (extsense != UNIT_ATTENTION && |
| 1472 | extsense != NOT_READY) { |
| 1473 | #ifdef DEBUG_DETECT |
| 1474 | printk("target %d lun %d: extended sense %d\n", |
| 1475 | aip->target, aip->lun, extsense); |
| 1476 | #endif |
| 1477 | return DEV_UNKNOWN; |
| 1478 | } |
| 1479 | } |
| 1480 | else { |
| 1481 | if (reqsense & 0x7f) { |
| 1482 | #ifdef DEBUG_DETECT |
| 1483 | printk("target %d lun %d: sense %d\n", |
| 1484 | aip->target, aip->lun, reqsense); |
| 1485 | #endif |
| 1486 | return DEV_UNKNOWN; |
| 1487 | } |
| 1488 | } |
| 1489 | } |
| 1490 | else |
| 1491 | if (reqsense == 0x4) { /* SH204 Bug workaround */ |
| 1492 | #ifdef DEBUG_DETECT |
| 1493 | printk("target %d lun %d status=0 sense=4\n", |
| 1494 | aip->target, aip->lun); |
| 1495 | #endif |
| 1496 | return DEV_UNKNOWN; |
| 1497 | } |
| 1498 | |
| 1499 | /***********************************************************/ |
| 1500 | /* Do an INQUIRY command to get more infos on this device. */ |
| 1501 | /***********************************************************/ |
| 1502 | |
| 1503 | /* Assume default values */ |
| 1504 | aip->removable = 1; |
| 1505 | aip->read_only = 0; |
| 1506 | aip->old_atari_disk = 0; |
| 1507 | aip->changed = (extsense == NOT_READY); /* medium inserted? */ |
| 1508 | aip->size = DEFAULT_SIZE; |
| 1509 | got_inquiry = 0; |
| 1510 | /* Fake inquiry result for old atari disks */ |
| 1511 | memcpy(acsi_buffer, "\000\000\001\000 Adaptec 40xx" |
| 1512 | " ", 40); |
| 1513 | CMDSET_TARG_LUN(inquiry_cmd, aip->target, aip->lun); |
| 1514 | if (acsicmd_dma(inquiry_cmd, acsi_buffer, 1, 0, 0) && |
| 1515 | acsi_getstatus() == 0) { |
| 1516 | acsicmd_nodma(inquiry_cmd, 0); |
| 1517 | acsi_getstatus(); |
| 1518 | dma_cache_maintenance( phys_acsi_buffer, 256, 0 ); |
| 1519 | got_inquiry = 1; |
| 1520 | aip->removable = !!(acsi_buffer[1] & 0x80); |
| 1521 | } |
| 1522 | if (aip->type == NONE) /* only at boot time */ |
| 1523 | print_inquiry(acsi_buffer); |
| 1524 | switch(acsi_buffer[0]) { |
| 1525 | case TYPE_DISK: |
| 1526 | aip->type = HARDDISK; |
| 1527 | break; |
| 1528 | case TYPE_ROM: |
| 1529 | aip->type = CDROM; |
| 1530 | aip->read_only = 1; |
| 1531 | break; |
| 1532 | default: |
| 1533 | return DEV_UNKNOWN; |
| 1534 | } |
| 1535 | /****************************/ |
| 1536 | /* Do a MODE SENSE command. */ |
| 1537 | /****************************/ |
| 1538 | |
| 1539 | if (!acsi_mode_sense(aip->target, aip->lun, &sense)) { |
| 1540 | printk( KERN_WARNING "No mode sense data.\n" ); |
| 1541 | return DEV_UNKNOWN; |
| 1542 | } |
| 1543 | if ((SECTOR_SIZE(sense) != 512) && |
| 1544 | ((aip->type != CDROM) || |
| 1545 | !acsi_change_blk_size(aip->target, aip->lun) || |
| 1546 | !acsi_mode_sense(aip->target, aip->lun, &sense) || |
| 1547 | (SECTOR_SIZE(sense) != 512))) { |
| 1548 | printk( KERN_WARNING "Sector size != 512 not supported.\n" ); |
| 1549 | return DEV_UNKNOWN; |
| 1550 | } |
| 1551 | /* There are disks out there that claim to have 0 sectors... */ |
| 1552 | if (CAPACITY(sense)) |
| 1553 | aip->size = CAPACITY(sense); /* else keep DEFAULT_SIZE */ |
| 1554 | if (!got_inquiry && SENSE_TYPE(sense) == SENSE_TYPE_ATARI) { |
| 1555 | /* If INQUIRY failed and the sense data suggest an old |
| 1556 | * Atari disk (SH20x, Megafile), the disk is not removable |
| 1557 | */ |
| 1558 | aip->removable = 0; |
| 1559 | aip->old_atari_disk = 1; |
| 1560 | } |
| 1561 | |
| 1562 | /******************/ |
| 1563 | /* We've done it. */ |
| 1564 | /******************/ |
| 1565 | |
| 1566 | return DEV_SUPPORTED; |
| 1567 | } |
| 1568 | |
| 1569 | EXPORT_SYMBOL(acsi_delay_start); |
| 1570 | EXPORT_SYMBOL(acsi_delay_end); |
| 1571 | EXPORT_SYMBOL(acsi_wait_for_IRQ); |
| 1572 | EXPORT_SYMBOL(acsi_wait_for_noIRQ); |
| 1573 | EXPORT_SYMBOL(acsicmd_nodma); |
| 1574 | EXPORT_SYMBOL(acsi_getstatus); |
| 1575 | EXPORT_SYMBOL(acsi_buffer); |
| 1576 | EXPORT_SYMBOL(phys_acsi_buffer); |
| 1577 | |
| 1578 | #ifdef CONFIG_ATARI_SLM_MODULE |
| 1579 | void acsi_attach_SLMs( int (*attach_func)( int, int ) ); |
| 1580 | |
| 1581 | EXPORT_SYMBOL(acsi_extstatus); |
| 1582 | EXPORT_SYMBOL(acsi_end_extstatus); |
| 1583 | EXPORT_SYMBOL(acsi_extcmd); |
| 1584 | EXPORT_SYMBOL(acsi_attach_SLMs); |
| 1585 | |
| 1586 | /* to remember IDs of SLM devices, SLM module is loaded later |
| 1587 | * (index is target#, contents is lun#, -1 means "no SLM") */ |
| 1588 | int SLM_devices[8]; |
| 1589 | #endif |
| 1590 | |
| 1591 | static struct block_device_operations acsi_fops = { |
| 1592 | .owner = THIS_MODULE, |
| 1593 | .open = acsi_open, |
| 1594 | .release = acsi_release, |
| 1595 | .ioctl = acsi_ioctl, |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame^] | 1596 | .getgeo = acsi_getgeo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | .media_changed = acsi_media_change, |
| 1598 | .revalidate_disk= acsi_revalidate, |
| 1599 | }; |
| 1600 | |
| 1601 | #ifdef CONFIG_ATARI_SLM_MODULE |
| 1602 | /* call attach_slm() for each device that is a printer; needed for init of SLM |
| 1603 | * driver as a module, since it's not yet present if acsi.c is inited and thus |
| 1604 | * the bus gets scanned. */ |
| 1605 | void acsi_attach_SLMs( int (*attach_func)( int, int ) ) |
| 1606 | { |
| 1607 | int i, n = 0; |
| 1608 | |
| 1609 | for( i = 0; i < 8; ++i ) |
| 1610 | if (SLM_devices[i] >= 0) |
| 1611 | n += (*attach_func)( i, SLM_devices[i] ); |
| 1612 | printk( KERN_INFO "Found %d SLM printer(s) total.\n", n ); |
| 1613 | } |
| 1614 | #endif /* CONFIG_ATARI_SLM_MODULE */ |
| 1615 | |
| 1616 | |
| 1617 | int acsi_init( void ) |
| 1618 | { |
| 1619 | int err = 0; |
| 1620 | int i, target, lun; |
| 1621 | struct acsi_info_struct *aip; |
| 1622 | #ifdef CONFIG_ATARI_SLM |
| 1623 | int n_slm = 0; |
| 1624 | #endif |
| 1625 | if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ACSI)) |
| 1626 | return 0; |
| 1627 | if (register_blkdev(ACSI_MAJOR, "ad")) { |
| 1628 | err = -EBUSY; |
| 1629 | goto out1; |
| 1630 | } |
| 1631 | if (!(acsi_buffer = |
| 1632 | (char *)atari_stram_alloc(ACSI_BUFFER_SIZE, "acsi"))) { |
| 1633 | err = -ENOMEM; |
| 1634 | printk( KERN_ERR "Unable to get ACSI ST-Ram buffer.\n" ); |
| 1635 | goto out2; |
| 1636 | } |
| 1637 | phys_acsi_buffer = virt_to_phys( acsi_buffer ); |
| 1638 | STramMask = ATARIHW_PRESENT(EXTD_DMA) ? 0x00000000 : 0xff000000; |
| 1639 | |
| 1640 | acsi_queue = blk_init_queue(do_acsi_request, &acsi_lock); |
| 1641 | if (!acsi_queue) { |
| 1642 | err = -ENOMEM; |
| 1643 | goto out2a; |
| 1644 | } |
| 1645 | #ifdef CONFIG_ATARI_SLM |
| 1646 | err = slm_init(); |
| 1647 | #endif |
| 1648 | if (err) |
| 1649 | goto out3; |
| 1650 | |
| 1651 | printk( KERN_INFO "Probing ACSI devices:\n" ); |
| 1652 | NDevices = 0; |
| 1653 | #ifdef CONFIG_ATARI_SLM_MODULE |
| 1654 | for( i = 0; i < 8; ++i ) |
| 1655 | SLM_devices[i] = -1; |
| 1656 | #endif |
| 1657 | stdma_lock(NULL, NULL); |
| 1658 | |
| 1659 | for (target = 0; target < 8 && NDevices < MAX_DEV; ++target) { |
| 1660 | lun = 0; |
| 1661 | do { |
| 1662 | aip = &acsi_info[NDevices]; |
| 1663 | aip->type = NONE; |
| 1664 | aip->target = target; |
| 1665 | aip->lun = lun; |
| 1666 | i = acsi_devinit(aip); |
| 1667 | switch (i) { |
| 1668 | case DEV_SUPPORTED: |
| 1669 | printk( KERN_INFO "Detected "); |
| 1670 | switch (aip->type) { |
| 1671 | case HARDDISK: |
| 1672 | printk("disk"); |
| 1673 | break; |
| 1674 | case CDROM: |
| 1675 | printk("cdrom"); |
| 1676 | break; |
| 1677 | default: |
| 1678 | } |
| 1679 | printk(" ad%c at id %d lun %d ", |
| 1680 | 'a' + NDevices, target, lun); |
| 1681 | if (aip->removable) |
| 1682 | printk("(removable) "); |
| 1683 | if (aip->read_only) |
| 1684 | printk("(read-only) "); |
| 1685 | if (aip->size == DEFAULT_SIZE) |
| 1686 | printk(" unkown size, using default "); |
| 1687 | printk("%ld MByte\n", |
| 1688 | (aip->size*512+1024*1024/2)/(1024*1024)); |
| 1689 | NDevices++; |
| 1690 | break; |
| 1691 | case DEV_SLM: |
| 1692 | #ifdef CONFIG_ATARI_SLM |
| 1693 | n_slm += attach_slm( target, lun ); |
| 1694 | break; |
| 1695 | #endif |
| 1696 | #ifdef CONFIG_ATARI_SLM_MODULE |
| 1697 | SLM_devices[target] = lun; |
| 1698 | break; |
| 1699 | #endif |
| 1700 | /* neither of the above: fall through to unknown device */ |
| 1701 | case DEV_UNKNOWN: |
| 1702 | printk( KERN_INFO "Detected unsupported device at " |
| 1703 | "id %d lun %d\n", target, lun); |
| 1704 | break; |
| 1705 | } |
| 1706 | } |
| 1707 | #ifdef CONFIG_ACSI_MULTI_LUN |
| 1708 | while (i != DEV_NONE && ++lun < MAX_LUN); |
| 1709 | #else |
| 1710 | while (0); |
| 1711 | #endif |
| 1712 | } |
| 1713 | |
| 1714 | /* reenable interrupt */ |
| 1715 | ENABLE_IRQ(); |
| 1716 | stdma_release(); |
| 1717 | |
| 1718 | #ifndef CONFIG_ATARI_SLM |
| 1719 | printk( KERN_INFO "Found %d ACSI device(s) total.\n", NDevices ); |
| 1720 | #else |
| 1721 | printk( KERN_INFO "Found %d ACSI device(s) and %d SLM printer(s) total.\n", |
| 1722 | NDevices, n_slm ); |
| 1723 | #endif |
| 1724 | err = -ENOMEM; |
| 1725 | for( i = 0; i < NDevices; ++i ) { |
| 1726 | acsi_gendisk[i] = alloc_disk(16); |
| 1727 | if (!acsi_gendisk[i]) |
| 1728 | goto out4; |
| 1729 | } |
| 1730 | |
| 1731 | for( i = 0; i < NDevices; ++i ) { |
| 1732 | struct gendisk *disk = acsi_gendisk[i]; |
| 1733 | sprintf(disk->disk_name, "ad%c", 'a'+i); |
| 1734 | aip = &acsi_info[NDevices]; |
| 1735 | sprintf(disk->devfs_name, "ad/target%d/lun%d", aip->target, aip->lun); |
| 1736 | disk->major = ACSI_MAJOR; |
| 1737 | disk->first_minor = i << 4; |
| 1738 | if (acsi_info[i].type != HARDDISK) { |
| 1739 | disk->minors = 1; |
| 1740 | strcat(disk->devfs_name, "/disc"); |
| 1741 | } |
| 1742 | disk->fops = &acsi_fops; |
| 1743 | disk->private_data = &acsi_info[i]; |
| 1744 | set_capacity(disk, acsi_info[i].size); |
| 1745 | disk->queue = acsi_queue; |
| 1746 | add_disk(disk); |
| 1747 | } |
| 1748 | return 0; |
| 1749 | out4: |
| 1750 | while (i--) |
| 1751 | put_disk(acsi_gendisk[i]); |
| 1752 | out3: |
| 1753 | blk_cleanup_queue(acsi_queue); |
| 1754 | out2a: |
| 1755 | atari_stram_free( acsi_buffer ); |
| 1756 | out2: |
| 1757 | unregister_blkdev( ACSI_MAJOR, "ad" ); |
| 1758 | out1: |
| 1759 | return err; |
| 1760 | } |
| 1761 | |
| 1762 | |
| 1763 | #ifdef MODULE |
| 1764 | |
| 1765 | MODULE_LICENSE("GPL"); |
| 1766 | |
| 1767 | int init_module(void) |
| 1768 | { |
| 1769 | int err; |
| 1770 | |
| 1771 | if ((err = acsi_init())) |
| 1772 | return( err ); |
| 1773 | printk( KERN_INFO "ACSI driver loaded as module.\n"); |
| 1774 | return( 0 ); |
| 1775 | } |
| 1776 | |
| 1777 | void cleanup_module(void) |
| 1778 | { |
| 1779 | int i; |
| 1780 | del_timer( &acsi_timer ); |
| 1781 | blk_cleanup_queue(acsi_queue); |
| 1782 | atari_stram_free( acsi_buffer ); |
| 1783 | |
| 1784 | if (unregister_blkdev( ACSI_MAJOR, "ad" ) != 0) |
| 1785 | printk( KERN_ERR "acsi: cleanup_module failed\n"); |
| 1786 | |
| 1787 | for (i = 0; i < NDevices; i++) { |
| 1788 | del_gendisk(acsi_gendisk[i]); |
| 1789 | put_disk(acsi_gendisk[i]); |
| 1790 | } |
| 1791 | } |
| 1792 | #endif |
| 1793 | |
| 1794 | /* |
| 1795 | * This routine is called to flush all partitions and partition tables |
| 1796 | * for a changed scsi disk, and then re-read the new partition table. |
| 1797 | * If we are revalidating a disk because of a media change, then we |
| 1798 | * enter with usage == 0. If we are using an ioctl, we automatically have |
| 1799 | * usage == 1 (we need an open channel to use an ioctl :-), so this |
| 1800 | * is our limit. |
| 1801 | * |
| 1802 | * Changes by Martin Rogge, 9th Aug 1995: |
| 1803 | * got cd-roms to work by calling acsi_devinit. There are only two problems: |
| 1804 | * First, if there is no medium inserted, the status will remain "changed". |
| 1805 | * That is no problem at all, but our design of three-valued logic (medium |
| 1806 | * changed, medium not changed, no medium inserted). |
| 1807 | * Secondly the check could fail completely and the drive could deliver |
| 1808 | * nonsensical data, which could mess up the acsi_info[] structure. In |
| 1809 | * that case we try to make the entry safe. |
| 1810 | * |
| 1811 | */ |
| 1812 | |
| 1813 | static int acsi_revalidate(struct gendisk *disk) |
| 1814 | { |
| 1815 | struct acsi_info_struct *aip = disk->private_data; |
| 1816 | stdma_lock( NULL, NULL ); |
| 1817 | if (acsi_devinit(aip) != DEV_SUPPORTED) { |
| 1818 | printk( KERN_ERR "ACSI: revalidate failed for target %d lun %d\n", |
| 1819 | aip->target, aip->lun); |
| 1820 | aip->size = 0; |
| 1821 | aip->read_only = 1; |
| 1822 | aip->removable = 1; |
| 1823 | aip->changed = 1; /* next acsi_open will try again... */ |
| 1824 | } |
| 1825 | |
| 1826 | ENABLE_IRQ(); |
| 1827 | stdma_release(); |
| 1828 | set_capacity(disk, aip->size); |
| 1829 | return 0; |
| 1830 | } |