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1da177e4 LT |
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 | ||
1da177e4 LT |
46 | #include <linux/module.h> |
47 | #include <linux/errno.h> | |
48 | #include <linux/signal.h> | |
1da177e4 LT |
49 | #include <linux/timer.h> |
50 | #include <linux/fs.h> | |
51 | #include <linux/kernel.h> | |
52 | #include <linux/genhd.h> | |
53 | #include <linux/delay.h> | |
54 | #include <linux/mm.h> | |
55 | #include <linux/major.h> | |
56 | #include <linux/slab.h> | |
57 | #include <linux/interrupt.h> | |
58 | #include <scsi/scsi.h> /* for SCSI_IOCTL_GET_IDLUN */ | |
1da177e4 LT |
59 | #include <scsi/scsi_ioctl.h> |
60 | #include <linux/hdreg.h> /* for HDIO_GETGEO */ | |
61 | #include <linux/blkpg.h> | |
62 | #include <linux/buffer_head.h> | |
63 | #include <linux/blkdev.h> | |
64 | ||
65 | #include <asm/setup.h> | |
66 | #include <asm/pgtable.h> | |
67 | #include <asm/system.h> | |
68 | #include <asm/uaccess.h> | |
69 | #include <asm/atarihw.h> | |
70 | #include <asm/atariints.h> | |
71 | #include <asm/atari_acsi.h> | |
72 | #include <asm/atari_stdma.h> | |
73 | #include <asm/atari_stram.h> | |
74 | ||
75 | static void (*do_acsi)(void) = NULL; | |
76 | static struct request_queue *acsi_queue; | |
77 | #define QUEUE (acsi_queue) | |
78 | #define CURRENT elv_next_request(acsi_queue) | |
79 | ||
80 | #define DEBUG | |
81 | #undef DEBUG_DETECT | |
82 | #undef NO_WRITE | |
83 | ||
84 | #define MAX_ERRORS 8 /* Max read/write errors/sector */ | |
85 | #define MAX_LUN 8 /* Max LUNs per target */ | |
86 | #define MAX_DEV 16 | |
87 | ||
88 | #define ACSI_BUFFER_SIZE (16*1024) /* "normal" ACSI buffer size */ | |
89 | #define ACSI_BUFFER_MINSIZE (2048) /* min. buf size if ext. DMA */ | |
90 | #define ACSI_BUFFER_SIZE_ORDER 2 /* order size for above */ | |
91 | #define ACSI_BUFFER_MINSIZE_ORDER 0 /* order size for above */ | |
92 | #define ACSI_BUFFER_SECTORS (ACSI_BUFFER_SIZE/512) | |
93 | ||
94 | #define ACSI_BUFFER_ORDER \ | |
95 | (ATARIHW_PRESENT(EXTD_DMA) ? \ | |
96 | ACSI_BUFFER_MINSIZE_ORDER : \ | |
97 | ACSI_BUFFER_SIZE_ORDER) | |
98 | ||
99 | #define ACSI_TIMEOUT (4*HZ) | |
100 | ||
101 | /* minimum delay between two commands */ | |
102 | ||
103 | #define COMMAND_DELAY 500 | |
104 | ||
105 | typedef enum { | |
106 | NONE, HARDDISK, CDROM | |
107 | } ACSI_TYPE; | |
108 | ||
109 | struct acsi_info_struct { | |
110 | ACSI_TYPE type; /* type of device */ | |
111 | unsigned target; /* target number */ | |
112 | unsigned lun; /* LUN in target controller */ | |
113 | unsigned removable : 1; /* Flag for removable media */ | |
114 | unsigned read_only : 1; /* Flag for read only devices */ | |
115 | unsigned old_atari_disk : 1; /* Is an old Atari disk */ | |
116 | unsigned changed : 1; /* Medium has been changed */ | |
117 | unsigned long size; /* #blocks */ | |
118 | int access_count; | |
119 | } acsi_info[MAX_DEV]; | |
120 | ||
121 | /* | |
122 | * SENSE KEYS | |
123 | */ | |
124 | ||
125 | #define NO_SENSE 0x00 | |
126 | #define RECOVERED_ERROR 0x01 | |
127 | #define NOT_READY 0x02 | |
128 | #define MEDIUM_ERROR 0x03 | |
129 | #define HARDWARE_ERROR 0x04 | |
130 | #define ILLEGAL_REQUEST 0x05 | |
131 | #define UNIT_ATTENTION 0x06 | |
132 | #define DATA_PROTECT 0x07 | |
133 | #define BLANK_CHECK 0x08 | |
134 | #define COPY_ABORTED 0x0a | |
135 | #define ABORTED_COMMAND 0x0b | |
136 | #define VOLUME_OVERFLOW 0x0d | |
137 | #define MISCOMPARE 0x0e | |
138 | ||
139 | ||
140 | /* | |
141 | * DEVICE TYPES | |
142 | */ | |
143 | ||
144 | #define TYPE_DISK 0x00 | |
145 | #define TYPE_TAPE 0x01 | |
146 | #define TYPE_WORM 0x04 | |
147 | #define TYPE_ROM 0x05 | |
148 | #define TYPE_MOD 0x07 | |
149 | #define TYPE_NO_LUN 0x7f | |
150 | ||
151 | /* The data returned by MODE SENSE differ between the old Atari | |
152 | * hard disks and SCSI disks connected to ACSI. In the following, both | |
153 | * formats are defined and some macros to operate on them potably. | |
154 | */ | |
155 | ||
156 | typedef struct { | |
157 | unsigned long dummy[2]; | |
158 | unsigned long sector_size; | |
159 | unsigned char format_code; | |
160 | #define ATARI_SENSE_FORMAT_FIX 1 | |
161 | #define ATARI_SENSE_FORMAT_CHNG 2 | |
162 | unsigned char cylinders_h; | |
163 | unsigned char cylinders_l; | |
164 | unsigned char heads; | |
165 | unsigned char reduced_h; | |
166 | unsigned char reduced_l; | |
167 | unsigned char precomp_h; | |
168 | unsigned char precomp_l; | |
169 | unsigned char landing_zone; | |
170 | unsigned char steprate; | |
171 | unsigned char type; | |
172 | #define ATARI_SENSE_TYPE_FIXCHNG_MASK 4 | |
173 | #define ATARI_SENSE_TYPE_SOFTHARD_MASK 8 | |
174 | #define ATARI_SENSE_TYPE_FIX 4 | |
175 | #define ATARI_SENSE_TYPE_CHNG 0 | |
176 | #define ATARI_SENSE_TYPE_SOFT 0 | |
177 | #define ATARI_SENSE_TYPE_HARD 8 | |
178 | unsigned char sectors; | |
179 | } ATARI_SENSE_DATA; | |
180 | ||
181 | #define ATARI_CAPACITY(sd) \ | |
182 | (((int)((sd).cylinders_h<<8)|(sd).cylinders_l) * \ | |
183 | (sd).heads * (sd).sectors) | |
184 | ||
185 | ||
186 | typedef struct { | |
187 | unsigned char dummy1; | |
188 | unsigned char medium_type; | |
189 | unsigned char dummy2; | |
190 | unsigned char descriptor_size; | |
191 | unsigned long block_count; | |
192 | unsigned long sector_size; | |
193 | /* Page 0 data */ | |
194 | unsigned char page_code; | |
195 | unsigned char page_size; | |
196 | unsigned char page_flags; | |
197 | unsigned char qualifier; | |
198 | } SCSI_SENSE_DATA; | |
199 | ||
200 | #define SCSI_CAPACITY(sd) ((sd).block_count & 0xffffff) | |
201 | ||
202 | ||
203 | typedef union { | |
204 | ATARI_SENSE_DATA atari; | |
205 | SCSI_SENSE_DATA scsi; | |
206 | } SENSE_DATA; | |
207 | ||
208 | #define SENSE_TYPE_UNKNOWN 0 | |
209 | #define SENSE_TYPE_ATARI 1 | |
210 | #define SENSE_TYPE_SCSI 2 | |
211 | ||
212 | #define SENSE_TYPE(sd) \ | |
213 | (((sd).atari.dummy[0] == 8 && \ | |
214 | ((sd).atari.format_code == 1 || \ | |
215 | (sd).atari.format_code == 2)) ? SENSE_TYPE_ATARI : \ | |
216 | ((sd).scsi.dummy1 >= 11) ? SENSE_TYPE_SCSI : \ | |
217 | SENSE_TYPE_UNKNOWN) | |
218 | ||
219 | #define CAPACITY(sd) \ | |
220 | (SENSE_TYPE(sd) == SENSE_TYPE_ATARI ? \ | |
221 | ATARI_CAPACITY((sd).atari) : \ | |
222 | SCSI_CAPACITY((sd).scsi)) | |
223 | ||
224 | #define SECTOR_SIZE(sd) \ | |
225 | (SENSE_TYPE(sd) == SENSE_TYPE_ATARI ? \ | |
226 | (sd).atari.sector_size : \ | |
227 | (sd).scsi.sector_size & 0xffffff) | |
228 | ||
229 | /* Default size if capacity cannot be determined (1 GByte) */ | |
230 | #define DEFAULT_SIZE 0x1fffff | |
231 | ||
232 | #define CARTRCH_STAT(aip,buf) \ | |
233 | (aip->old_atari_disk ? \ | |
234 | (((buf)[0] & 0x7f) == 0x28) : \ | |
235 | ((((buf)[0] & 0x70) == 0x70) ? \ | |
236 | (((buf)[2] & 0x0f) == 0x06) : \ | |
237 | (((buf)[0] & 0x0f) == 0x06))) \ | |
238 | ||
239 | /* These two are also exported to other drivers that work on the ACSI bus and | |
240 | * need an ST-RAM buffer. */ | |
241 | char *acsi_buffer; | |
242 | unsigned long phys_acsi_buffer; | |
243 | ||
244 | static int NDevices; | |
245 | ||
246 | static int CurrentNReq; | |
247 | static int CurrentNSect; | |
248 | static char *CurrentBuffer; | |
249 | ||
250 | static DEFINE_SPINLOCK(acsi_lock); | |
251 | ||
252 | ||
253 | #define SET_TIMER() mod_timer(&acsi_timer, jiffies + ACSI_TIMEOUT) | |
254 | #define CLEAR_TIMER() del_timer(&acsi_timer) | |
255 | ||
256 | static unsigned long STramMask; | |
257 | #define STRAM_ADDR(a) (((a) & STramMask) == 0) | |
258 | ||
259 | ||
260 | ||
261 | /* ACSI commands */ | |
262 | ||
263 | static char tur_cmd[6] = { 0x00, 0, 0, 0, 0, 0 }; | |
264 | static char modesense_cmd[6] = { 0x1a, 0, 0, 0, 24, 0 }; | |
265 | static char modeselect_cmd[6] = { 0x15, 0, 0, 0, 12, 0 }; | |
266 | static char inquiry_cmd[6] = { 0x12, 0, 0, 0,255, 0 }; | |
267 | static char reqsense_cmd[6] = { 0x03, 0, 0, 0, 4, 0 }; | |
268 | static char read_cmd[6] = { 0x08, 0, 0, 0, 0, 0 }; | |
269 | static char write_cmd[6] = { 0x0a, 0, 0, 0, 0, 0 }; | |
270 | static char pa_med_rem_cmd[6] = { 0x1e, 0, 0, 0, 0, 0 }; | |
271 | ||
272 | #define CMDSET_TARG_LUN(cmd,targ,lun) \ | |
273 | do { \ | |
274 | cmd[0] = (cmd[0] & ~0xe0) | (targ)<<5; \ | |
275 | cmd[1] = (cmd[1] & ~0xe0) | (lun)<<5; \ | |
276 | } while(0) | |
277 | ||
278 | #define CMDSET_BLOCK(cmd,blk) \ | |
279 | do { \ | |
280 | unsigned long __blk = (blk); \ | |
281 | cmd[3] = __blk; __blk >>= 8; \ | |
282 | cmd[2] = __blk; __blk >>= 8; \ | |
283 | cmd[1] = (cmd[1] & 0xe0) | (__blk & 0x1f); \ | |
284 | } while(0) | |
285 | ||
286 | #define CMDSET_LEN(cmd,len) \ | |
287 | do { \ | |
288 | cmd[4] = (len); \ | |
289 | } while(0) | |
290 | ||
291 | /* ACSI errors (from REQUEST SENSE); There are two tables, one for the | |
292 | * old Atari disks and one for SCSI on ACSI disks. | |
293 | */ | |
294 | ||
295 | struct acsi_error { | |
296 | unsigned char code; | |
297 | const char *text; | |
298 | } atari_acsi_errors[] = { | |
299 | { 0x00, "No error (??)" }, | |
300 | { 0x01, "No index pulses" }, | |
301 | { 0x02, "Seek not complete" }, | |
302 | { 0x03, "Write fault" }, | |
303 | { 0x04, "Drive not ready" }, | |
304 | { 0x06, "No Track 00 signal" }, | |
305 | { 0x10, "ECC error in ID field" }, | |
306 | { 0x11, "Uncorrectable data error" }, | |
307 | { 0x12, "ID field address mark not found" }, | |
308 | { 0x13, "Data field address mark not found" }, | |
309 | { 0x14, "Record not found" }, | |
310 | { 0x15, "Seek error" }, | |
311 | { 0x18, "Data check in no retry mode" }, | |
312 | { 0x19, "ECC error during verify" }, | |
313 | { 0x1a, "Access to bad block" }, | |
314 | { 0x1c, "Unformatted or bad format" }, | |
315 | { 0x20, "Invalid command" }, | |
316 | { 0x21, "Invalid block address" }, | |
317 | { 0x23, "Volume overflow" }, | |
318 | { 0x24, "Invalid argument" }, | |
319 | { 0x25, "Invalid drive number" }, | |
320 | { 0x26, "Byte zero parity check" }, | |
321 | { 0x28, "Cartride changed" }, | |
322 | { 0x2c, "Error count overflow" }, | |
323 | { 0x30, "Controller selftest failed" } | |
324 | }, | |
325 | ||
326 | scsi_acsi_errors[] = { | |
327 | { 0x00, "No error (??)" }, | |
328 | { 0x01, "Recovered error" }, | |
329 | { 0x02, "Drive not ready" }, | |
330 | { 0x03, "Uncorrectable medium error" }, | |
331 | { 0x04, "Hardware error" }, | |
332 | { 0x05, "Illegal request" }, | |
333 | { 0x06, "Unit attention (Reset or cartridge changed)" }, | |
334 | { 0x07, "Data protection" }, | |
335 | { 0x08, "Blank check" }, | |
336 | { 0x0b, "Aborted Command" }, | |
337 | { 0x0d, "Volume overflow" } | |
338 | }; | |
339 | ||
340 | ||
341 | ||
342 | /***************************** Prototypes *****************************/ | |
343 | ||
344 | static int acsicmd_dma( const char *cmd, char *buffer, int blocks, int | |
345 | rwflag, int enable); | |
346 | static int acsi_reqsense( char *buffer, int targ, int lun); | |
347 | static void acsi_print_error(const unsigned char *errblk, struct acsi_info_struct *aip); | |
7d12e780 | 348 | static irqreturn_t acsi_interrupt (int irq, void *data); |
1da177e4 LT |
349 | static void unexpected_acsi_interrupt( void ); |
350 | static void bad_rw_intr( void ); | |
351 | static void read_intr( void ); | |
352 | static void write_intr( void); | |
353 | static void acsi_times_out( unsigned long dummy ); | |
354 | static void copy_to_acsibuffer( void ); | |
355 | static void copy_from_acsibuffer( void ); | |
356 | static void do_end_requests( void ); | |
357 | static void do_acsi_request( request_queue_t * ); | |
358 | static void redo_acsi_request( void ); | |
359 | static int acsi_ioctl( struct inode *inode, struct file *file, unsigned int | |
360 | cmd, unsigned long arg ); | |
361 | static int acsi_open( struct inode * inode, struct file * filp ); | |
362 | static int acsi_release( struct inode * inode, struct file * file ); | |
363 | static void acsi_prevent_removal(struct acsi_info_struct *aip, int flag ); | |
364 | static int acsi_change_blk_size( int target, int lun); | |
365 | static int acsi_mode_sense( int target, int lun, SENSE_DATA *sd ); | |
366 | static int acsi_revalidate (struct gendisk *disk); | |
367 | ||
368 | /************************* End of Prototypes **************************/ | |
369 | ||
370 | ||
8d06afab | 371 | DEFINE_TIMER(acsi_timer, acsi_times_out, 0, 0); |
1da177e4 LT |
372 | |
373 | ||
374 | #ifdef CONFIG_ATARI_SLM | |
375 | ||
376 | extern int attach_slm( int target, int lun ); | |
377 | extern int slm_init( void ); | |
378 | ||
379 | #endif | |
380 | ||
381 | ||
382 | \f | |
383 | /*********************************************************************** | |
384 | * | |
385 | * ACSI primitives | |
386 | * | |
387 | **********************************************************************/ | |
388 | ||
389 | ||
390 | /* | |
391 | * The following two functions wait for _IRQ to become Low or High, | |
392 | * resp., with a timeout. The 'timeout' parameter is in jiffies | |
393 | * (10ms). | |
394 | * If the functions are called with timer interrupts on (int level < | |
395 | * 6), the timeout is based on the 'jiffies' variable to provide exact | |
396 | * timeouts for device probing etc. | |
397 | * If interrupts are disabled, the number of tries is based on the | |
398 | * 'loops_per_jiffy' variable. A rough estimation is sufficient here... | |
399 | */ | |
400 | ||
401 | #define INT_LEVEL \ | |
402 | ({ unsigned __sr; \ | |
403 | __asm__ __volatile__ ( "movew %/sr,%0" : "=dm" (__sr) ); \ | |
404 | (__sr >> 8) & 7; \ | |
405 | }) | |
406 | ||
407 | int acsi_wait_for_IRQ( unsigned timeout ) | |
408 | ||
409 | { | |
410 | if (INT_LEVEL < 6) { | |
411 | unsigned long maxjif = jiffies + timeout; | |
412 | while (time_before(jiffies, maxjif)) | |
413 | if (!(mfp.par_dt_reg & 0x20)) return( 1 ); | |
414 | } | |
415 | else { | |
416 | long tries = loops_per_jiffy / 8 * timeout; | |
417 | while( --tries >= 0 ) | |
418 | if (!(mfp.par_dt_reg & 0x20)) return( 1 ); | |
419 | } | |
420 | return( 0 ); /* timeout! */ | |
421 | } | |
422 | ||
423 | ||
424 | int acsi_wait_for_noIRQ( unsigned timeout ) | |
425 | ||
426 | { | |
427 | if (INT_LEVEL < 6) { | |
428 | unsigned long maxjif = jiffies + timeout; | |
429 | while (time_before(jiffies, maxjif)) | |
430 | if (mfp.par_dt_reg & 0x20) return( 1 ); | |
431 | } | |
432 | else { | |
433 | long tries = loops_per_jiffy * timeout / 8; | |
434 | while( tries-- >= 0 ) | |
435 | if (mfp.par_dt_reg & 0x20) return( 1 ); | |
436 | } | |
437 | return( 0 ); /* timeout! */ | |
438 | } | |
439 | ||
440 | static struct timeval start_time; | |
441 | ||
442 | void | |
443 | acsi_delay_start(void) | |
444 | { | |
445 | do_gettimeofday(&start_time); | |
446 | } | |
447 | ||
448 | /* wait from acsi_delay_start to now usec (<1E6) usec */ | |
449 | ||
450 | void | |
451 | acsi_delay_end(long usec) | |
452 | { | |
453 | struct timeval end_time; | |
454 | long deltau,deltas; | |
455 | do_gettimeofday(&end_time); | |
456 | deltau=end_time.tv_usec - start_time.tv_usec; | |
457 | deltas=end_time.tv_sec - start_time.tv_sec; | |
458 | if (deltas > 1 || deltas < 0) | |
459 | return; | |
460 | if (deltas > 0) | |
461 | deltau += 1000*1000; | |
462 | if (deltau >= usec) | |
463 | return; | |
464 | udelay(usec-deltau); | |
465 | } | |
466 | ||
467 | /* acsicmd_dma() sends an ACSI command and sets up the DMA to transfer | |
468 | * 'blocks' blocks of 512 bytes from/to 'buffer'. | |
469 | * Because the _IRQ signal is used for handshaking the command bytes, | |
470 | * the ACSI interrupt has to be disabled in this function. If the end | |
471 | * of the operation should be signalled by a real interrupt, it has to be | |
472 | * reenabled afterwards. | |
473 | */ | |
474 | ||
475 | static int acsicmd_dma( const char *cmd, char *buffer, int blocks, int rwflag, int enable) | |
476 | ||
477 | { unsigned long flags, paddr; | |
478 | int i; | |
479 | ||
480 | #ifdef NO_WRITE | |
481 | if (rwflag || *cmd == 0x0a) { | |
482 | printk( "ACSI: Write commands disabled!\n" ); | |
483 | return( 0 ); | |
484 | } | |
485 | #endif | |
486 | ||
487 | rwflag = rwflag ? 0x100 : 0; | |
488 | paddr = virt_to_phys( buffer ); | |
489 | ||
490 | acsi_delay_end(COMMAND_DELAY); | |
491 | DISABLE_IRQ(); | |
492 | ||
493 | local_irq_save(flags); | |
494 | /* Low on A1 */ | |
495 | dma_wd.dma_mode_status = 0x88 | rwflag; | |
496 | MFPDELAY(); | |
497 | ||
498 | /* set DMA address */ | |
499 | dma_wd.dma_lo = (unsigned char)paddr; | |
500 | paddr >>= 8; | |
501 | MFPDELAY(); | |
502 | dma_wd.dma_md = (unsigned char)paddr; | |
503 | paddr >>= 8; | |
504 | MFPDELAY(); | |
505 | if (ATARIHW_PRESENT(EXTD_DMA)) | |
506 | st_dma_ext_dmahi = (unsigned short)paddr; | |
507 | else | |
508 | dma_wd.dma_hi = (unsigned char)paddr; | |
509 | MFPDELAY(); | |
510 | local_irq_restore(flags); | |
511 | ||
512 | /* send the command bytes except the last */ | |
513 | for( i = 0; i < 5; ++i ) { | |
514 | DMA_LONG_WRITE( *cmd++, 0x8a | rwflag ); | |
515 | udelay(20); | |
516 | if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */ | |
517 | } | |
518 | ||
519 | /* Clear FIFO and switch DMA to correct direction */ | |
520 | dma_wd.dma_mode_status = 0x92 | (rwflag ^ 0x100); | |
521 | MFPDELAY(); | |
522 | dma_wd.dma_mode_status = 0x92 | rwflag; | |
523 | MFPDELAY(); | |
524 | ||
525 | /* How many sectors for DMA */ | |
526 | dma_wd.fdc_acces_seccount = blocks; | |
527 | MFPDELAY(); | |
528 | ||
529 | /* send last command byte */ | |
530 | dma_wd.dma_mode_status = 0x8a | rwflag; | |
531 | MFPDELAY(); | |
532 | DMA_LONG_WRITE( *cmd++, 0x0a | rwflag ); | |
533 | if (enable) | |
534 | ENABLE_IRQ(); | |
535 | udelay(80); | |
536 | ||
537 | return( 1 ); | |
538 | } | |
539 | ||
540 | ||
541 | /* | |
542 | * acsicmd_nodma() sends an ACSI command that requires no DMA. | |
543 | */ | |
544 | ||
545 | int acsicmd_nodma( const char *cmd, int enable) | |
546 | ||
547 | { int i; | |
548 | ||
549 | acsi_delay_end(COMMAND_DELAY); | |
550 | DISABLE_IRQ(); | |
551 | ||
552 | /* send first command byte */ | |
553 | dma_wd.dma_mode_status = 0x88; | |
554 | MFPDELAY(); | |
555 | DMA_LONG_WRITE( *cmd++, 0x8a ); | |
556 | udelay(20); | |
557 | if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */ | |
558 | ||
559 | /* send the intermediate command bytes */ | |
560 | for( i = 0; i < 4; ++i ) { | |
561 | DMA_LONG_WRITE( *cmd++, 0x8a ); | |
562 | udelay(20); | |
563 | if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */ | |
564 | } | |
565 | ||
566 | /* send last command byte */ | |
567 | DMA_LONG_WRITE( *cmd++, 0x0a ); | |
568 | if (enable) | |
569 | ENABLE_IRQ(); | |
570 | udelay(80); | |
571 | ||
572 | return( 1 ); | |
573 | /* Note that the ACSI interrupt is still disabled after this | |
574 | * function. If you want to get the IRQ delivered, enable it manually! | |
575 | */ | |
576 | } | |
577 | ||
578 | ||
579 | static int acsi_reqsense( char *buffer, int targ, int lun) | |
580 | ||
581 | { | |
582 | CMDSET_TARG_LUN( reqsense_cmd, targ, lun); | |
583 | if (!acsicmd_dma( reqsense_cmd, buffer, 1, 0, 0 )) return( 0 ); | |
584 | if (!acsi_wait_for_IRQ( 10 )) return( 0 ); | |
585 | acsi_getstatus(); | |
586 | if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 ); | |
587 | if (!acsi_wait_for_IRQ( 10 )) return( 0 ); | |
588 | acsi_getstatus(); | |
589 | if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 ); | |
590 | if (!acsi_wait_for_IRQ( 10 )) return( 0 ); | |
591 | acsi_getstatus(); | |
592 | if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 ); | |
593 | if (!acsi_wait_for_IRQ( 10 )) return( 0 ); | |
594 | acsi_getstatus(); | |
595 | dma_cache_maintenance( virt_to_phys(buffer), 16, 0 ); | |
596 | ||
597 | return( 1 ); | |
598 | } | |
599 | ||
600 | ||
601 | /* | |
602 | * ACSI status phase: get the status byte from the bus | |
603 | * | |
604 | * I've seen several times that a 0xff status is read, propably due to | |
605 | * a timing error. In this case, the procedure is repeated after the | |
606 | * next _IRQ edge. | |
607 | */ | |
608 | ||
609 | int acsi_getstatus( void ) | |
610 | ||
611 | { int status; | |
612 | ||
613 | DISABLE_IRQ(); | |
614 | for(;;) { | |
615 | if (!acsi_wait_for_IRQ( 100 )) { | |
616 | acsi_delay_start(); | |
617 | return( -1 ); | |
618 | } | |
619 | dma_wd.dma_mode_status = 0x8a; | |
620 | MFPDELAY(); | |
621 | status = dma_wd.fdc_acces_seccount; | |
622 | if (status != 0xff) break; | |
623 | #ifdef DEBUG | |
624 | printk("ACSI: skipping 0xff status byte\n" ); | |
625 | #endif | |
626 | udelay(40); | |
627 | acsi_wait_for_noIRQ( 20 ); | |
628 | } | |
629 | dma_wd.dma_mode_status = 0x80; | |
630 | udelay(40); | |
631 | acsi_wait_for_noIRQ( 20 ); | |
632 | ||
633 | acsi_delay_start(); | |
634 | return( status & 0x1f ); /* mask of the device# */ | |
635 | } | |
636 | ||
637 | ||
638 | #if (defined(CONFIG_ATARI_SLM) || defined(CONFIG_ATARI_SLM_MODULE)) | |
639 | ||
640 | /* Receive data in an extended status phase. Needed by SLM printer. */ | |
641 | ||
642 | int acsi_extstatus( char *buffer, int cnt ) | |
643 | ||
644 | { int status; | |
645 | ||
646 | DISABLE_IRQ(); | |
647 | udelay(80); | |
648 | while( cnt-- > 0 ) { | |
649 | if (!acsi_wait_for_IRQ( 40 )) return( 0 ); | |
650 | dma_wd.dma_mode_status = 0x8a; | |
651 | MFPDELAY(); | |
652 | status = dma_wd.fdc_acces_seccount; | |
653 | MFPDELAY(); | |
654 | *buffer++ = status & 0xff; | |
655 | udelay(40); | |
656 | } | |
657 | return( 1 ); | |
658 | } | |
659 | ||
660 | ||
661 | /* Finish an extended status phase */ | |
662 | ||
663 | void acsi_end_extstatus( void ) | |
664 | ||
665 | { | |
666 | dma_wd.dma_mode_status = 0x80; | |
667 | udelay(40); | |
668 | acsi_wait_for_noIRQ( 20 ); | |
669 | acsi_delay_start(); | |
670 | } | |
671 | ||
672 | ||
673 | /* Send data in an extended command phase */ | |
674 | ||
675 | int acsi_extcmd( unsigned char *buffer, int cnt ) | |
676 | ||
677 | { | |
678 | while( cnt-- > 0 ) { | |
679 | DMA_LONG_WRITE( *buffer++, 0x8a ); | |
680 | udelay(20); | |
681 | if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */ | |
682 | } | |
683 | return( 1 ); | |
684 | } | |
685 | ||
686 | #endif | |
687 | ||
688 | ||
689 | static void acsi_print_error(const unsigned char *errblk, struct acsi_info_struct *aip) | |
690 | ||
691 | { int atari_err, i, errcode; | |
692 | struct acsi_error *arr; | |
693 | ||
694 | atari_err = aip->old_atari_disk; | |
695 | if (atari_err) | |
696 | errcode = errblk[0] & 0x7f; | |
697 | else | |
698 | if ((errblk[0] & 0x70) == 0x70) | |
699 | errcode = errblk[2] & 0x0f; | |
700 | else | |
701 | errcode = errblk[0] & 0x0f; | |
702 | ||
703 | printk( KERN_ERR "ACSI error 0x%02x", errcode ); | |
704 | ||
705 | if (errblk[0] & 0x80) | |
706 | printk( " for sector %d", | |
707 | ((errblk[1] & 0x1f) << 16) | | |
708 | (errblk[2] << 8) | errblk[0] ); | |
709 | ||
710 | arr = atari_err ? atari_acsi_errors : scsi_acsi_errors; | |
711 | i = atari_err ? sizeof(atari_acsi_errors)/sizeof(*atari_acsi_errors) : | |
712 | sizeof(scsi_acsi_errors)/sizeof(*scsi_acsi_errors); | |
713 | ||
714 | for( --i; i >= 0; --i ) | |
715 | if (arr[i].code == errcode) break; | |
716 | if (i >= 0) | |
717 | printk( ": %s\n", arr[i].text ); | |
718 | } | |
719 | ||
720 | /******************************************************************* | |
721 | * | |
722 | * ACSI interrupt routine | |
723 | * Test, if this is a ACSI interrupt and call the irq handler | |
724 | * Otherwise ignore this interrupt. | |
725 | * | |
726 | *******************************************************************/ | |
727 | ||
7d12e780 | 728 | static irqreturn_t acsi_interrupt(int irq, void *data ) |
1da177e4 LT |
729 | |
730 | { void (*acsi_irq_handler)(void) = do_acsi; | |
731 | ||
732 | do_acsi = NULL; | |
733 | CLEAR_TIMER(); | |
734 | ||
735 | if (!acsi_irq_handler) | |
736 | acsi_irq_handler = unexpected_acsi_interrupt; | |
737 | acsi_irq_handler(); | |
738 | return IRQ_HANDLED; | |
739 | } | |
740 | ||
741 | ||
742 | /****************************************************************** | |
743 | * | |
744 | * The Interrupt handlers | |
745 | * | |
746 | *******************************************************************/ | |
747 | ||
748 | ||
749 | static void unexpected_acsi_interrupt( void ) | |
750 | ||
751 | { | |
752 | printk( KERN_WARNING "Unexpected ACSI interrupt\n" ); | |
753 | } | |
754 | ||
755 | ||
756 | /* This function is called in case of errors. Because we cannot reset | |
757 | * the ACSI bus or a single device, there is no other choice than | |
758 | * retrying several times :-( | |
759 | */ | |
760 | ||
761 | static void bad_rw_intr( void ) | |
762 | ||
763 | { | |
764 | if (!CURRENT) | |
765 | return; | |
766 | ||
767 | if (++CURRENT->errors >= MAX_ERRORS) | |
768 | end_request(CURRENT, 0); | |
769 | /* Otherwise just retry */ | |
770 | } | |
771 | ||
772 | ||
773 | static void read_intr( void ) | |
774 | ||
775 | { int status; | |
776 | ||
777 | status = acsi_getstatus(); | |
778 | if (status != 0) { | |
779 | struct gendisk *disk = CURRENT->rq_disk; | |
780 | struct acsi_info_struct *aip = disk->private_data; | |
781 | printk(KERN_ERR "%s: ", disk->disk_name); | |
782 | if (!acsi_reqsense(acsi_buffer, aip->target, aip->lun)) | |
783 | printk( "ACSI error and REQUEST SENSE failed (status=0x%02x)\n", status ); | |
784 | else { | |
785 | acsi_print_error(acsi_buffer, aip); | |
786 | if (CARTRCH_STAT(aip, acsi_buffer)) | |
787 | aip->changed = 1; | |
788 | } | |
789 | ENABLE_IRQ(); | |
790 | bad_rw_intr(); | |
791 | redo_acsi_request(); | |
792 | return; | |
793 | } | |
794 | ||
795 | dma_cache_maintenance( virt_to_phys(CurrentBuffer), CurrentNSect*512, 0 ); | |
796 | if (CurrentBuffer == acsi_buffer) | |
797 | copy_from_acsibuffer(); | |
798 | ||
799 | do_end_requests(); | |
800 | redo_acsi_request(); | |
801 | } | |
802 | ||
803 | ||
804 | static void write_intr(void) | |
805 | ||
806 | { int status; | |
807 | ||
808 | status = acsi_getstatus(); | |
809 | if (status != 0) { | |
810 | struct gendisk *disk = CURRENT->rq_disk; | |
811 | struct acsi_info_struct *aip = disk->private_data; | |
812 | printk( KERN_ERR "%s: ", disk->disk_name); | |
813 | if (!acsi_reqsense( acsi_buffer, aip->target, aip->lun)) | |
814 | printk( "ACSI error and REQUEST SENSE failed (status=0x%02x)\n", status ); | |
815 | else { | |
816 | acsi_print_error(acsi_buffer, aip); | |
817 | if (CARTRCH_STAT(aip, acsi_buffer)) | |
818 | aip->changed = 1; | |
819 | } | |
820 | bad_rw_intr(); | |
821 | redo_acsi_request(); | |
822 | return; | |
823 | } | |
824 | ||
825 | do_end_requests(); | |
826 | redo_acsi_request(); | |
827 | } | |
828 | ||
829 | ||
830 | static void acsi_times_out( unsigned long dummy ) | |
831 | ||
832 | { | |
833 | DISABLE_IRQ(); | |
834 | if (!do_acsi) return; | |
835 | ||
836 | do_acsi = NULL; | |
837 | printk( KERN_ERR "ACSI timeout\n" ); | |
838 | if (!CURRENT) | |
839 | return; | |
840 | if (++CURRENT->errors >= MAX_ERRORS) { | |
841 | #ifdef DEBUG | |
842 | printk( KERN_ERR "ACSI: too many errors.\n" ); | |
843 | #endif | |
844 | end_request(CURRENT, 0); | |
845 | } | |
846 | ||
847 | redo_acsi_request(); | |
848 | } | |
849 | ||
850 | ||
851 | \f | |
852 | /*********************************************************************** | |
853 | * | |
854 | * Scatter-gather utility functions | |
855 | * | |
856 | ***********************************************************************/ | |
857 | ||
858 | ||
859 | static void copy_to_acsibuffer( void ) | |
860 | ||
861 | { int i; | |
862 | char *src, *dst; | |
863 | struct buffer_head *bh; | |
864 | ||
865 | src = CURRENT->buffer; | |
866 | dst = acsi_buffer; | |
867 | bh = CURRENT->bh; | |
868 | ||
869 | if (!bh) | |
870 | memcpy( dst, src, CurrentNSect*512 ); | |
871 | else | |
872 | for( i = 0; i < CurrentNReq; ++i ) { | |
873 | memcpy( dst, src, bh->b_size ); | |
874 | dst += bh->b_size; | |
875 | if ((bh = bh->b_reqnext)) | |
876 | src = bh->b_data; | |
877 | } | |
878 | } | |
879 | ||
880 | ||
881 | static void copy_from_acsibuffer( void ) | |
882 | ||
883 | { int i; | |
884 | char *src, *dst; | |
885 | struct buffer_head *bh; | |
886 | ||
887 | dst = CURRENT->buffer; | |
888 | src = acsi_buffer; | |
889 | bh = CURRENT->bh; | |
890 | ||
891 | if (!bh) | |
892 | memcpy( dst, src, CurrentNSect*512 ); | |
893 | else | |
894 | for( i = 0; i < CurrentNReq; ++i ) { | |
895 | memcpy( dst, src, bh->b_size ); | |
896 | src += bh->b_size; | |
897 | if ((bh = bh->b_reqnext)) | |
898 | dst = bh->b_data; | |
899 | } | |
900 | } | |
901 | ||
902 | ||
903 | static void do_end_requests( void ) | |
904 | ||
905 | { int i, n; | |
906 | ||
907 | if (!CURRENT->bh) { | |
908 | CURRENT->nr_sectors -= CurrentNSect; | |
909 | CURRENT->current_nr_sectors -= CurrentNSect; | |
910 | CURRENT->sector += CurrentNSect; | |
911 | if (CURRENT->nr_sectors == 0) | |
912 | end_request(CURRENT, 1); | |
913 | } | |
914 | else { | |
915 | for( i = 0; i < CurrentNReq; ++i ) { | |
916 | n = CURRENT->bh->b_size >> 9; | |
917 | CURRENT->nr_sectors -= n; | |
918 | CURRENT->current_nr_sectors -= n; | |
919 | CURRENT->sector += n; | |
920 | end_request(CURRENT, 1); | |
921 | } | |
922 | } | |
923 | } | |
924 | ||
925 | ||
926 | ||
927 | \f | |
928 | /*********************************************************************** | |
929 | * | |
930 | * do_acsi_request and friends | |
931 | * | |
932 | ***********************************************************************/ | |
933 | ||
934 | static void do_acsi_request( request_queue_t * q ) | |
935 | ||
936 | { | |
937 | stdma_lock( acsi_interrupt, NULL ); | |
938 | redo_acsi_request(); | |
939 | } | |
940 | ||
941 | ||
942 | static void redo_acsi_request( void ) | |
943 | { | |
944 | unsigned block, target, lun, nsect; | |
945 | char *buffer; | |
946 | unsigned long pbuffer; | |
947 | struct buffer_head *bh; | |
948 | struct gendisk *disk; | |
949 | struct acsi_info_struct *aip; | |
950 | ||
951 | repeat: | |
952 | CLEAR_TIMER(); | |
953 | ||
954 | if (do_acsi) | |
955 | return; | |
956 | ||
957 | if (!CURRENT) { | |
958 | do_acsi = NULL; | |
959 | ENABLE_IRQ(); | |
960 | stdma_release(); | |
961 | return; | |
962 | } | |
963 | ||
964 | disk = CURRENT->rq_disk; | |
965 | aip = disk->private_data; | |
966 | if (CURRENT->bh) { | |
967 | if (!CURRENT->bh && !buffer_locked(CURRENT->bh)) | |
968 | panic("ACSI: block not locked"); | |
969 | } | |
970 | ||
971 | block = CURRENT->sector; | |
972 | if (block+CURRENT->nr_sectors >= get_capacity(disk)) { | |
973 | #ifdef DEBUG | |
974 | printk( "%s: attempted access for blocks %d...%ld past end of device at block %ld.\n", | |
975 | disk->disk_name, | |
976 | block, block + CURRENT->nr_sectors - 1, | |
977 | get_capacity(disk)); | |
978 | #endif | |
979 | end_request(CURRENT, 0); | |
980 | goto repeat; | |
981 | } | |
982 | if (aip->changed) { | |
983 | printk( KERN_NOTICE "%s: request denied because cartridge has " | |
984 | "been changed.\n", disk->disk_name); | |
985 | end_request(CURRENT, 0); | |
986 | goto repeat; | |
987 | } | |
988 | ||
989 | target = aip->target; | |
990 | lun = aip->lun; | |
991 | ||
992 | /* Find out how many sectors should be transferred from/to | |
993 | * consecutive buffers and thus can be done with a single command. | |
994 | */ | |
995 | buffer = CURRENT->buffer; | |
996 | pbuffer = virt_to_phys(buffer); | |
997 | nsect = CURRENT->current_nr_sectors; | |
998 | CurrentNReq = 1; | |
999 | ||
1000 | if ((bh = CURRENT->bh) && bh != CURRENT->bhtail) { | |
1001 | if (!STRAM_ADDR(pbuffer)) { | |
1002 | /* If transfer is done via the ACSI buffer anyway, we can | |
1003 | * assemble as much bh's as fit in the buffer. | |
1004 | */ | |
1005 | while( (bh = bh->b_reqnext) ) { | |
1006 | if (nsect + (bh->b_size>>9) > ACSI_BUFFER_SECTORS) break; | |
1007 | nsect += bh->b_size >> 9; | |
1008 | ++CurrentNReq; | |
1009 | if (bh == CURRENT->bhtail) break; | |
1010 | } | |
1011 | buffer = acsi_buffer; | |
1012 | pbuffer = phys_acsi_buffer; | |
1013 | } | |
1014 | else { | |
1015 | unsigned long pendadr, pnewadr; | |
1016 | pendadr = pbuffer + nsect*512; | |
1017 | while( (bh = bh->b_reqnext) ) { | |
1018 | pnewadr = virt_to_phys(bh->b_data); | |
1019 | if (!STRAM_ADDR(pnewadr) || pendadr != pnewadr) break; | |
1020 | nsect += bh->b_size >> 9; | |
1021 | pendadr = pnewadr + bh->b_size; | |
1022 | ++CurrentNReq; | |
1023 | if (bh == CURRENT->bhtail) break; | |
1024 | } | |
1025 | } | |
1026 | } | |
1027 | else { | |
1028 | if (!STRAM_ADDR(pbuffer)) { | |
1029 | buffer = acsi_buffer; | |
1030 | pbuffer = phys_acsi_buffer; | |
1031 | if (nsect > ACSI_BUFFER_SECTORS) | |
1032 | nsect = ACSI_BUFFER_SECTORS; | |
1033 | } | |
1034 | } | |
1035 | CurrentBuffer = buffer; | |
1036 | CurrentNSect = nsect; | |
1037 | ||
1038 | if (rq_data_dir(CURRENT) == WRITE) { | |
1039 | CMDSET_TARG_LUN( write_cmd, target, lun ); | |
1040 | CMDSET_BLOCK( write_cmd, block ); | |
1041 | CMDSET_LEN( write_cmd, nsect ); | |
1042 | if (buffer == acsi_buffer) | |
1043 | copy_to_acsibuffer(); | |
1044 | dma_cache_maintenance( pbuffer, nsect*512, 1 ); | |
1045 | do_acsi = write_intr; | |
1046 | if (!acsicmd_dma( write_cmd, buffer, nsect, 1, 1)) { | |
1047 | do_acsi = NULL; | |
1048 | printk( KERN_ERR "ACSI (write): Timeout in command block\n" ); | |
1049 | bad_rw_intr(); | |
1050 | goto repeat; | |
1051 | } | |
1052 | SET_TIMER(); | |
1053 | return; | |
1054 | } | |
1055 | if (rq_data_dir(CURRENT) == READ) { | |
1056 | CMDSET_TARG_LUN( read_cmd, target, lun ); | |
1057 | CMDSET_BLOCK( read_cmd, block ); | |
1058 | CMDSET_LEN( read_cmd, nsect ); | |
1059 | do_acsi = read_intr; | |
1060 | if (!acsicmd_dma( read_cmd, buffer, nsect, 0, 1)) { | |
1061 | do_acsi = NULL; | |
1062 | printk( KERN_ERR "ACSI (read): Timeout in command block\n" ); | |
1063 | bad_rw_intr(); | |
1064 | goto repeat; | |
1065 | } | |
1066 | SET_TIMER(); | |
1067 | return; | |
1068 | } | |
1069 | panic("unknown ACSI command"); | |
1070 | } | |
1071 | ||
1072 | ||
1073 | \f | |
1074 | /*********************************************************************** | |
1075 | * | |
1076 | * Misc functions: ioctl, open, release, check_change, ... | |
1077 | * | |
1078 | ***********************************************************************/ | |
1079 | ||
a885c8c4 CH |
1080 | static int acsi_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1081 | { | |
1082 | struct acsi_info_struct *aip = bdev->bd_disk->private_data; | |
1083 | ||
1084 | /* | |
1085 | * Just fake some geometry here, it's nonsense anyway | |
1086 | * To make it easy, use Adaptec's usual 64/32 mapping | |
1087 | */ | |
1088 | geo->heads = 64; | |
1089 | geo->sectors = 32; | |
1090 | geo->cylinders = aip->size >> 11; | |
1091 | return 0; | |
1092 | } | |
1da177e4 LT |
1093 | |
1094 | static int acsi_ioctl( struct inode *inode, struct file *file, | |
1095 | unsigned int cmd, unsigned long arg ) | |
1096 | { | |
1097 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1098 | struct acsi_info_struct *aip = disk->private_data; | |
1099 | switch (cmd) { | |
1da177e4 LT |
1100 | case SCSI_IOCTL_GET_IDLUN: |
1101 | /* SCSI compatible GET_IDLUN call to get target's ID and LUN number */ | |
1102 | put_user( aip->target | (aip->lun << 8), | |
1103 | &((Scsi_Idlun *) arg)->dev_id ); | |
1104 | put_user( 0, &((Scsi_Idlun *) arg)->host_unique_id ); | |
1105 | return 0; | |
1106 | default: | |
1107 | return -EINVAL; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | ||
1112 | /* | |
1113 | * Open a device, check for read-only and lock the medium if it is | |
1114 | * removable. | |
1115 | * | |
1116 | * Changes by Martin Rogge, 9th Aug 1995: | |
1117 | * Check whether check_disk_change (and therefore revalidate_acsidisk) | |
1118 | * was successful. They fail when there is no medium in the drive. | |
1119 | * | |
1120 | * The problem of media being changed during an operation can be | |
1121 | * ignored because of the prevent_removal code. | |
1122 | * | |
1123 | * Added check for the validity of the device number. | |
1124 | * | |
1125 | */ | |
1126 | ||
1127 | static int acsi_open( struct inode * inode, struct file * filp ) | |
1128 | { | |
1129 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1130 | struct acsi_info_struct *aip = disk->private_data; | |
1131 | ||
1132 | if (aip->access_count == 0 && aip->removable) { | |
1133 | #if 0 | |
1134 | aip->changed = 1; /* safety first */ | |
1135 | #endif | |
1136 | check_disk_change( inode->i_bdev ); | |
1137 | if (aip->changed) /* revalidate was not successful (no medium) */ | |
1138 | return -ENXIO; | |
1139 | acsi_prevent_removal(aip, 1); | |
1140 | } | |
1141 | aip->access_count++; | |
1142 | ||
1143 | if (filp && filp->f_mode) { | |
1144 | check_disk_change( inode->i_bdev ); | |
1145 | if (filp->f_mode & 2) { | |
1146 | if (aip->read_only) { | |
1147 | acsi_release( inode, filp ); | |
1148 | return -EROFS; | |
1149 | } | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | /* | |
1157 | * Releasing a block device means we sync() it, so that it can safely | |
1158 | * be forgotten about... | |
1159 | */ | |
1160 | ||
1161 | static int acsi_release( struct inode * inode, struct file * file ) | |
1162 | { | |
1163 | struct gendisk *disk = inode->i_bdev->bd_disk; | |
1164 | struct acsi_info_struct *aip = disk->private_data; | |
1165 | if (--aip->access_count == 0 && aip->removable) | |
1166 | acsi_prevent_removal(aip, 0); | |
1167 | return( 0 ); | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Prevent or allow a media change for removable devices. | |
1172 | */ | |
1173 | ||
1174 | static void acsi_prevent_removal(struct acsi_info_struct *aip, int flag) | |
1175 | { | |
1176 | stdma_lock( NULL, NULL ); | |
1177 | ||
1178 | CMDSET_TARG_LUN(pa_med_rem_cmd, aip->target, aip->lun); | |
1179 | CMDSET_LEN( pa_med_rem_cmd, flag ); | |
1180 | ||
1181 | if (acsicmd_nodma(pa_med_rem_cmd, 0) && acsi_wait_for_IRQ(3*HZ)) | |
1182 | acsi_getstatus(); | |
1183 | /* Do not report errors -- some devices may not know this command. */ | |
1184 | ||
1185 | ENABLE_IRQ(); | |
1186 | stdma_release(); | |
1187 | } | |
1188 | ||
1189 | static int acsi_media_change(struct gendisk *disk) | |
1190 | { | |
1191 | struct acsi_info_struct *aip = disk->private_data; | |
1192 | ||
1193 | if (!aip->removable) | |
1194 | return 0; | |
1195 | ||
1196 | if (aip->changed) | |
1197 | /* We can be sure that the medium has been changed -- REQUEST | |
1198 | * SENSE has reported this earlier. | |
1199 | */ | |
1200 | return 1; | |
1201 | ||
1202 | /* If the flag isn't set, make a test by reading block 0. | |
1203 | * If errors happen, it seems to be better to say "changed"... | |
1204 | */ | |
1205 | stdma_lock( NULL, NULL ); | |
1206 | CMDSET_TARG_LUN(read_cmd, aip->target, aip->lun); | |
1207 | CMDSET_BLOCK( read_cmd, 0 ); | |
1208 | CMDSET_LEN( read_cmd, 1 ); | |
1209 | if (acsicmd_dma(read_cmd, acsi_buffer, 1, 0, 0) && | |
1210 | acsi_wait_for_IRQ(3*HZ)) { | |
1211 | if (acsi_getstatus()) { | |
1212 | if (acsi_reqsense(acsi_buffer, aip->target, aip->lun)) { | |
1213 | if (CARTRCH_STAT(aip, acsi_buffer)) | |
1214 | aip->changed = 1; | |
1215 | } | |
1216 | else { | |
1217 | printk( KERN_ERR "%s: REQUEST SENSE failed in test for " | |
1218 | "medium change; assuming a change\n", disk->disk_name ); | |
1219 | aip->changed = 1; | |
1220 | } | |
1221 | } | |
1222 | } | |
1223 | else { | |
1224 | printk( KERN_ERR "%s: Test for medium changed timed out; " | |
1225 | "assuming a change\n", disk->disk_name); | |
1226 | aip->changed = 1; | |
1227 | } | |
1228 | ENABLE_IRQ(); | |
1229 | stdma_release(); | |
1230 | ||
1231 | /* Now, after reading a block, the changed status is surely valid. */ | |
1232 | return aip->changed; | |
1233 | } | |
1234 | ||
1235 | ||
1236 | static int acsi_change_blk_size( int target, int lun) | |
1237 | ||
1238 | { int i; | |
1239 | ||
1240 | for (i=0; i<12; i++) | |
1241 | acsi_buffer[i] = 0; | |
1242 | ||
1243 | acsi_buffer[3] = 8; | |
1244 | acsi_buffer[10] = 2; | |
1245 | CMDSET_TARG_LUN( modeselect_cmd, target, lun); | |
1246 | ||
1247 | if (!acsicmd_dma( modeselect_cmd, acsi_buffer, 1,1,0) || | |
1248 | !acsi_wait_for_IRQ( 3*HZ ) || | |
1249 | acsi_getstatus() != 0 ) { | |
1250 | return(0); | |
1251 | } | |
1252 | return(1); | |
1253 | } | |
1254 | ||
1255 | ||
1256 | static int acsi_mode_sense( int target, int lun, SENSE_DATA *sd ) | |
1257 | ||
1258 | { | |
1259 | int page; | |
1260 | ||
1261 | CMDSET_TARG_LUN( modesense_cmd, target, lun ); | |
1262 | for (page=0; page<4; page++) { | |
1263 | modesense_cmd[2] = page; | |
1264 | if (!acsicmd_dma( modesense_cmd, acsi_buffer, 1, 0, 0 ) || | |
1265 | !acsi_wait_for_IRQ( 3*HZ ) || | |
1266 | acsi_getstatus()) | |
1267 | continue; | |
1268 | ||
1269 | /* read twice to jump over the second 16-byte border! */ | |
1270 | udelay(300); | |
1271 | if (acsi_wait_for_noIRQ( 20 ) && | |
1272 | acsicmd_nodma( modesense_cmd, 0 ) && | |
1273 | acsi_wait_for_IRQ( 3*HZ ) && | |
1274 | acsi_getstatus() == 0) | |
1275 | break; | |
1276 | } | |
1277 | if (page == 4) { | |
1278 | return(0); | |
1279 | } | |
1280 | ||
1281 | dma_cache_maintenance( phys_acsi_buffer, sizeof(SENSE_DATA), 0 ); | |
1282 | *sd = *(SENSE_DATA *)acsi_buffer; | |
1283 | ||
1284 | /* Validity check, depending on type of data */ | |
1285 | ||
1286 | switch( SENSE_TYPE(*sd) ) { | |
1287 | ||
1288 | case SENSE_TYPE_ATARI: | |
1289 | if (CAPACITY(*sd) == 0) | |
1290 | goto invalid_sense; | |
1291 | break; | |
1292 | ||
1293 | case SENSE_TYPE_SCSI: | |
1294 | if (sd->scsi.descriptor_size != 8) | |
1295 | goto invalid_sense; | |
1296 | break; | |
1297 | ||
1298 | case SENSE_TYPE_UNKNOWN: | |
1299 | ||
1300 | printk( KERN_ERR "ACSI target %d, lun %d: Cannot interpret " | |
1301 | "sense data\n", target, lun ); | |
1302 | ||
1303 | invalid_sense: | |
1304 | ||
1305 | #ifdef DEBUG | |
1306 | { int i; | |
1307 | printk( "Mode sense data for ACSI target %d, lun %d seem not valid:", | |
1308 | target, lun ); | |
1309 | for( i = 0; i < sizeof(SENSE_DATA); ++i ) | |
1310 | printk( "%02x ", (unsigned char)acsi_buffer[i] ); | |
1311 | printk( "\n" ); | |
1312 | } | |
1313 | #endif | |
1314 | return( 0 ); | |
1315 | } | |
1316 | ||
1317 | return( 1 ); | |
1318 | } | |
1319 | ||
1320 | ||
1321 | ||
1322 | /******************************************************************* | |
1323 | * | |
1324 | * Initialization | |
1325 | * | |
1326 | ********************************************************************/ | |
1327 | ||
1328 | ||
1329 | extern struct block_device_operations acsi_fops; | |
1330 | ||
1331 | static struct gendisk *acsi_gendisk[MAX_DEV]; | |
1332 | ||
1333 | #define MAX_SCSI_DEVICE_CODE 10 | |
1334 | ||
1335 | static const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE] = | |
1336 | { | |
1337 | "Direct-Access ", | |
1338 | "Sequential-Access", | |
1339 | "Printer ", | |
1340 | "Processor ", | |
1341 | "WORM ", | |
1342 | "CD-ROM ", | |
1343 | "Scanner ", | |
1344 | "Optical Device ", | |
1345 | "Medium Changer ", | |
1346 | "Communications " | |
1347 | }; | |
1348 | ||
1349 | static void print_inquiry(unsigned char *data) | |
1350 | { | |
1351 | int i; | |
1352 | ||
1353 | printk(KERN_INFO " Vendor: "); | |
1354 | for (i = 8; i < 16; i++) | |
1355 | { | |
1356 | if (data[i] >= 0x20 && i < data[4] + 5) | |
1357 | printk("%c", data[i]); | |
1358 | else | |
1359 | printk(" "); | |
1360 | } | |
1361 | ||
1362 | printk(" Model: "); | |
1363 | for (i = 16; i < 32; i++) | |
1364 | { | |
1365 | if (data[i] >= 0x20 && i < data[4] + 5) | |
1366 | printk("%c", data[i]); | |
1367 | else | |
1368 | printk(" "); | |
1369 | } | |
1370 | ||
1371 | printk(" Rev: "); | |
1372 | for (i = 32; i < 36; i++) | |
1373 | { | |
1374 | if (data[i] >= 0x20 && i < data[4] + 5) | |
1375 | printk("%c", data[i]); | |
1376 | else | |
1377 | printk(" "); | |
1378 | } | |
1379 | ||
1380 | printk("\n"); | |
1381 | ||
1382 | i = data[0] & 0x1f; | |
1383 | ||
1384 | printk(KERN_INFO " Type: %s ", (i < MAX_SCSI_DEVICE_CODE | |
1385 | ? scsi_device_types[i] | |
1386 | : "Unknown ")); | |
1387 | printk(" ANSI SCSI revision: %02x", data[2] & 0x07); | |
1388 | if ((data[2] & 0x07) == 1 && (data[3] & 0x0f) == 1) | |
1389 | printk(" CCS\n"); | |
1390 | else | |
1391 | printk("\n"); | |
1392 | } | |
1393 | ||
1394 | ||
1395 | /* | |
1396 | * Changes by Martin Rogge, 9th Aug 1995: | |
1397 | * acsi_devinit has been taken out of acsi_geninit, because it needs | |
1398 | * to be called from revalidate_acsidisk. The result of request sense | |
1399 | * is now checked for DRIVE NOT READY. | |
1400 | * | |
1401 | * The structure *aip is only valid when acsi_devinit returns | |
1402 | * DEV_SUPPORTED. | |
1403 | * | |
1404 | */ | |
1405 | ||
1406 | #define DEV_NONE 0 | |
1407 | #define DEV_UNKNOWN 1 | |
1408 | #define DEV_SUPPORTED 2 | |
1409 | #define DEV_SLM 3 | |
1410 | ||
1411 | static int acsi_devinit(struct acsi_info_struct *aip) | |
1412 | { | |
1413 | int status, got_inquiry; | |
1414 | SENSE_DATA sense; | |
1415 | unsigned char reqsense, extsense; | |
1416 | ||
1417 | /*****************************************************************/ | |
1418 | /* Do a TEST UNIT READY command to test the presence of a device */ | |
1419 | /*****************************************************************/ | |
1420 | ||
1421 | CMDSET_TARG_LUN(tur_cmd, aip->target, aip->lun); | |
1422 | if (!acsicmd_nodma(tur_cmd, 0)) { | |
1423 | /* timed out -> no device here */ | |
1424 | #ifdef DEBUG_DETECT | |
1425 | printk("target %d lun %d: timeout\n", aip->target, aip->lun); | |
1426 | #endif | |
1427 | return DEV_NONE; | |
1428 | } | |
1429 | ||
1430 | /*************************/ | |
1431 | /* Read the ACSI status. */ | |
1432 | /*************************/ | |
1433 | ||
1434 | status = acsi_getstatus(); | |
1435 | if (status) { | |
1436 | if (status == 0x12) { | |
1437 | /* The SLM printer should be the only device that | |
1438 | * responds with the error code in the status byte. In | |
1439 | * correct status bytes, bit 4 is never set. | |
1440 | */ | |
1441 | printk( KERN_INFO "Detected SLM printer at id %d lun %d\n", | |
1442 | aip->target, aip->lun); | |
1443 | return DEV_SLM; | |
1444 | } | |
1445 | /* ignore CHECK CONDITION, since some devices send a | |
1446 | UNIT ATTENTION */ | |
1447 | if ((status & 0x1e) != 0x2) { | |
1448 | #ifdef DEBUG_DETECT | |
1449 | printk("target %d lun %d: status %d\n", | |
1450 | aip->target, aip->lun, status); | |
1451 | #endif | |
1452 | return DEV_UNKNOWN; | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | /*******************************/ | |
1457 | /* Do a REQUEST SENSE command. */ | |
1458 | /*******************************/ | |
1459 | ||
1460 | if (!acsi_reqsense(acsi_buffer, aip->target, aip->lun)) { | |
1461 | printk( KERN_WARNING "acsi_reqsense failed\n"); | |
1462 | acsi_buffer[0] = 0; | |
1463 | acsi_buffer[2] = UNIT_ATTENTION; | |
1464 | } | |
1465 | reqsense = acsi_buffer[0]; | |
1466 | extsense = acsi_buffer[2] & 0xf; | |
1467 | if (status) { | |
1468 | if ((reqsense & 0x70) == 0x70) { /* extended sense */ | |
1469 | if (extsense != UNIT_ATTENTION && | |
1470 | extsense != NOT_READY) { | |
1471 | #ifdef DEBUG_DETECT | |
1472 | printk("target %d lun %d: extended sense %d\n", | |
1473 | aip->target, aip->lun, extsense); | |
1474 | #endif | |
1475 | return DEV_UNKNOWN; | |
1476 | } | |
1477 | } | |
1478 | else { | |
1479 | if (reqsense & 0x7f) { | |
1480 | #ifdef DEBUG_DETECT | |
1481 | printk("target %d lun %d: sense %d\n", | |
1482 | aip->target, aip->lun, reqsense); | |
1483 | #endif | |
1484 | return DEV_UNKNOWN; | |
1485 | } | |
1486 | } | |
1487 | } | |
1488 | else | |
1489 | if (reqsense == 0x4) { /* SH204 Bug workaround */ | |
1490 | #ifdef DEBUG_DETECT | |
1491 | printk("target %d lun %d status=0 sense=4\n", | |
1492 | aip->target, aip->lun); | |
1493 | #endif | |
1494 | return DEV_UNKNOWN; | |
1495 | } | |
1496 | ||
1497 | /***********************************************************/ | |
1498 | /* Do an INQUIRY command to get more infos on this device. */ | |
1499 | /***********************************************************/ | |
1500 | ||
1501 | /* Assume default values */ | |
1502 | aip->removable = 1; | |
1503 | aip->read_only = 0; | |
1504 | aip->old_atari_disk = 0; | |
1505 | aip->changed = (extsense == NOT_READY); /* medium inserted? */ | |
1506 | aip->size = DEFAULT_SIZE; | |
1507 | got_inquiry = 0; | |
1508 | /* Fake inquiry result for old atari disks */ | |
1509 | memcpy(acsi_buffer, "\000\000\001\000 Adaptec 40xx" | |
1510 | " ", 40); | |
1511 | CMDSET_TARG_LUN(inquiry_cmd, aip->target, aip->lun); | |
1512 | if (acsicmd_dma(inquiry_cmd, acsi_buffer, 1, 0, 0) && | |
1513 | acsi_getstatus() == 0) { | |
1514 | acsicmd_nodma(inquiry_cmd, 0); | |
1515 | acsi_getstatus(); | |
1516 | dma_cache_maintenance( phys_acsi_buffer, 256, 0 ); | |
1517 | got_inquiry = 1; | |
1518 | aip->removable = !!(acsi_buffer[1] & 0x80); | |
1519 | } | |
1520 | if (aip->type == NONE) /* only at boot time */ | |
1521 | print_inquiry(acsi_buffer); | |
1522 | switch(acsi_buffer[0]) { | |
1523 | case TYPE_DISK: | |
1524 | aip->type = HARDDISK; | |
1525 | break; | |
1526 | case TYPE_ROM: | |
1527 | aip->type = CDROM; | |
1528 | aip->read_only = 1; | |
1529 | break; | |
1530 | default: | |
1531 | return DEV_UNKNOWN; | |
1532 | } | |
1533 | /****************************/ | |
1534 | /* Do a MODE SENSE command. */ | |
1535 | /****************************/ | |
1536 | ||
1537 | if (!acsi_mode_sense(aip->target, aip->lun, &sense)) { | |
1538 | printk( KERN_WARNING "No mode sense data.\n" ); | |
1539 | return DEV_UNKNOWN; | |
1540 | } | |
1541 | if ((SECTOR_SIZE(sense) != 512) && | |
1542 | ((aip->type != CDROM) || | |
1543 | !acsi_change_blk_size(aip->target, aip->lun) || | |
1544 | !acsi_mode_sense(aip->target, aip->lun, &sense) || | |
1545 | (SECTOR_SIZE(sense) != 512))) { | |
1546 | printk( KERN_WARNING "Sector size != 512 not supported.\n" ); | |
1547 | return DEV_UNKNOWN; | |
1548 | } | |
1549 | /* There are disks out there that claim to have 0 sectors... */ | |
1550 | if (CAPACITY(sense)) | |
1551 | aip->size = CAPACITY(sense); /* else keep DEFAULT_SIZE */ | |
1552 | if (!got_inquiry && SENSE_TYPE(sense) == SENSE_TYPE_ATARI) { | |
1553 | /* If INQUIRY failed and the sense data suggest an old | |
1554 | * Atari disk (SH20x, Megafile), the disk is not removable | |
1555 | */ | |
1556 | aip->removable = 0; | |
1557 | aip->old_atari_disk = 1; | |
1558 | } | |
1559 | ||
1560 | /******************/ | |
1561 | /* We've done it. */ | |
1562 | /******************/ | |
1563 | ||
1564 | return DEV_SUPPORTED; | |
1565 | } | |
1566 | ||
1567 | EXPORT_SYMBOL(acsi_delay_start); | |
1568 | EXPORT_SYMBOL(acsi_delay_end); | |
1569 | EXPORT_SYMBOL(acsi_wait_for_IRQ); | |
1570 | EXPORT_SYMBOL(acsi_wait_for_noIRQ); | |
1571 | EXPORT_SYMBOL(acsicmd_nodma); | |
1572 | EXPORT_SYMBOL(acsi_getstatus); | |
1573 | EXPORT_SYMBOL(acsi_buffer); | |
1574 | EXPORT_SYMBOL(phys_acsi_buffer); | |
1575 | ||
1576 | #ifdef CONFIG_ATARI_SLM_MODULE | |
1577 | void acsi_attach_SLMs( int (*attach_func)( int, int ) ); | |
1578 | ||
1579 | EXPORT_SYMBOL(acsi_extstatus); | |
1580 | EXPORT_SYMBOL(acsi_end_extstatus); | |
1581 | EXPORT_SYMBOL(acsi_extcmd); | |
1582 | EXPORT_SYMBOL(acsi_attach_SLMs); | |
1583 | ||
1584 | /* to remember IDs of SLM devices, SLM module is loaded later | |
1585 | * (index is target#, contents is lun#, -1 means "no SLM") */ | |
1586 | int SLM_devices[8]; | |
1587 | #endif | |
1588 | ||
1589 | static struct block_device_operations acsi_fops = { | |
1590 | .owner = THIS_MODULE, | |
1591 | .open = acsi_open, | |
1592 | .release = acsi_release, | |
1593 | .ioctl = acsi_ioctl, | |
a885c8c4 | 1594 | .getgeo = acsi_getgeo, |
1da177e4 LT |
1595 | .media_changed = acsi_media_change, |
1596 | .revalidate_disk= acsi_revalidate, | |
1597 | }; | |
1598 | ||
1599 | #ifdef CONFIG_ATARI_SLM_MODULE | |
1600 | /* call attach_slm() for each device that is a printer; needed for init of SLM | |
1601 | * driver as a module, since it's not yet present if acsi.c is inited and thus | |
1602 | * the bus gets scanned. */ | |
1603 | void acsi_attach_SLMs( int (*attach_func)( int, int ) ) | |
1604 | { | |
1605 | int i, n = 0; | |
1606 | ||
1607 | for( i = 0; i < 8; ++i ) | |
1608 | if (SLM_devices[i] >= 0) | |
1609 | n += (*attach_func)( i, SLM_devices[i] ); | |
1610 | printk( KERN_INFO "Found %d SLM printer(s) total.\n", n ); | |
1611 | } | |
1612 | #endif /* CONFIG_ATARI_SLM_MODULE */ | |
1613 | ||
1614 | ||
1615 | int acsi_init( void ) | |
1616 | { | |
1617 | int err = 0; | |
1618 | int i, target, lun; | |
1619 | struct acsi_info_struct *aip; | |
1620 | #ifdef CONFIG_ATARI_SLM | |
1621 | int n_slm = 0; | |
1622 | #endif | |
1623 | if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ACSI)) | |
1624 | return 0; | |
1625 | if (register_blkdev(ACSI_MAJOR, "ad")) { | |
1626 | err = -EBUSY; | |
1627 | goto out1; | |
1628 | } | |
1629 | if (!(acsi_buffer = | |
1630 | (char *)atari_stram_alloc(ACSI_BUFFER_SIZE, "acsi"))) { | |
1631 | err = -ENOMEM; | |
1632 | printk( KERN_ERR "Unable to get ACSI ST-Ram buffer.\n" ); | |
1633 | goto out2; | |
1634 | } | |
1635 | phys_acsi_buffer = virt_to_phys( acsi_buffer ); | |
1636 | STramMask = ATARIHW_PRESENT(EXTD_DMA) ? 0x00000000 : 0xff000000; | |
1637 | ||
1638 | acsi_queue = blk_init_queue(do_acsi_request, &acsi_lock); | |
1639 | if (!acsi_queue) { | |
1640 | err = -ENOMEM; | |
1641 | goto out2a; | |
1642 | } | |
1643 | #ifdef CONFIG_ATARI_SLM | |
1644 | err = slm_init(); | |
1645 | #endif | |
1646 | if (err) | |
1647 | goto out3; | |
1648 | ||
1649 | printk( KERN_INFO "Probing ACSI devices:\n" ); | |
1650 | NDevices = 0; | |
1651 | #ifdef CONFIG_ATARI_SLM_MODULE | |
1652 | for( i = 0; i < 8; ++i ) | |
1653 | SLM_devices[i] = -1; | |
1654 | #endif | |
1655 | stdma_lock(NULL, NULL); | |
1656 | ||
1657 | for (target = 0; target < 8 && NDevices < MAX_DEV; ++target) { | |
1658 | lun = 0; | |
1659 | do { | |
1660 | aip = &acsi_info[NDevices]; | |
1661 | aip->type = NONE; | |
1662 | aip->target = target; | |
1663 | aip->lun = lun; | |
1664 | i = acsi_devinit(aip); | |
1665 | switch (i) { | |
1666 | case DEV_SUPPORTED: | |
1667 | printk( KERN_INFO "Detected "); | |
1668 | switch (aip->type) { | |
1669 | case HARDDISK: | |
1670 | printk("disk"); | |
1671 | break; | |
1672 | case CDROM: | |
1673 | printk("cdrom"); | |
1674 | break; | |
1675 | default: | |
1676 | } | |
1677 | printk(" ad%c at id %d lun %d ", | |
1678 | 'a' + NDevices, target, lun); | |
1679 | if (aip->removable) | |
1680 | printk("(removable) "); | |
1681 | if (aip->read_only) | |
1682 | printk("(read-only) "); | |
1683 | if (aip->size == DEFAULT_SIZE) | |
1684 | printk(" unkown size, using default "); | |
1685 | printk("%ld MByte\n", | |
1686 | (aip->size*512+1024*1024/2)/(1024*1024)); | |
1687 | NDevices++; | |
1688 | break; | |
1689 | case DEV_SLM: | |
1690 | #ifdef CONFIG_ATARI_SLM | |
1691 | n_slm += attach_slm( target, lun ); | |
1692 | break; | |
1693 | #endif | |
1694 | #ifdef CONFIG_ATARI_SLM_MODULE | |
1695 | SLM_devices[target] = lun; | |
1696 | break; | |
1697 | #endif | |
1698 | /* neither of the above: fall through to unknown device */ | |
1699 | case DEV_UNKNOWN: | |
1700 | printk( KERN_INFO "Detected unsupported device at " | |
1701 | "id %d lun %d\n", target, lun); | |
1702 | break; | |
1703 | } | |
1704 | } | |
1705 | #ifdef CONFIG_ACSI_MULTI_LUN | |
1706 | while (i != DEV_NONE && ++lun < MAX_LUN); | |
1707 | #else | |
1708 | while (0); | |
1709 | #endif | |
1710 | } | |
1711 | ||
1712 | /* reenable interrupt */ | |
1713 | ENABLE_IRQ(); | |
1714 | stdma_release(); | |
1715 | ||
1716 | #ifndef CONFIG_ATARI_SLM | |
1717 | printk( KERN_INFO "Found %d ACSI device(s) total.\n", NDevices ); | |
1718 | #else | |
1719 | printk( KERN_INFO "Found %d ACSI device(s) and %d SLM printer(s) total.\n", | |
1720 | NDevices, n_slm ); | |
1721 | #endif | |
1722 | err = -ENOMEM; | |
1723 | for( i = 0; i < NDevices; ++i ) { | |
1724 | acsi_gendisk[i] = alloc_disk(16); | |
1725 | if (!acsi_gendisk[i]) | |
1726 | goto out4; | |
1727 | } | |
1728 | ||
1729 | for( i = 0; i < NDevices; ++i ) { | |
1730 | struct gendisk *disk = acsi_gendisk[i]; | |
1731 | sprintf(disk->disk_name, "ad%c", 'a'+i); | |
1732 | aip = &acsi_info[NDevices]; | |
1da177e4 LT |
1733 | disk->major = ACSI_MAJOR; |
1734 | disk->first_minor = i << 4; | |
ce7b0f46 | 1735 | if (acsi_info[i].type != HARDDISK) |
1da177e4 | 1736 | disk->minors = 1; |
1da177e4 LT |
1737 | disk->fops = &acsi_fops; |
1738 | disk->private_data = &acsi_info[i]; | |
1739 | set_capacity(disk, acsi_info[i].size); | |
1740 | disk->queue = acsi_queue; | |
1741 | add_disk(disk); | |
1742 | } | |
1743 | return 0; | |
1744 | out4: | |
1745 | while (i--) | |
1746 | put_disk(acsi_gendisk[i]); | |
1747 | out3: | |
1748 | blk_cleanup_queue(acsi_queue); | |
1749 | out2a: | |
1750 | atari_stram_free( acsi_buffer ); | |
1751 | out2: | |
1752 | unregister_blkdev( ACSI_MAJOR, "ad" ); | |
1753 | out1: | |
1754 | return err; | |
1755 | } | |
1756 | ||
1757 | ||
1758 | #ifdef MODULE | |
1759 | ||
1760 | MODULE_LICENSE("GPL"); | |
1761 | ||
1762 | int init_module(void) | |
1763 | { | |
1764 | int err; | |
1765 | ||
1766 | if ((err = acsi_init())) | |
1767 | return( err ); | |
1768 | printk( KERN_INFO "ACSI driver loaded as module.\n"); | |
1769 | return( 0 ); | |
1770 | } | |
1771 | ||
1772 | void cleanup_module(void) | |
1773 | { | |
1774 | int i; | |
1775 | del_timer( &acsi_timer ); | |
1776 | blk_cleanup_queue(acsi_queue); | |
1777 | atari_stram_free( acsi_buffer ); | |
1778 | ||
1779 | if (unregister_blkdev( ACSI_MAJOR, "ad" ) != 0) | |
1780 | printk( KERN_ERR "acsi: cleanup_module failed\n"); | |
1781 | ||
1782 | for (i = 0; i < NDevices; i++) { | |
1783 | del_gendisk(acsi_gendisk[i]); | |
1784 | put_disk(acsi_gendisk[i]); | |
1785 | } | |
1786 | } | |
1787 | #endif | |
1788 | ||
1789 | /* | |
1790 | * This routine is called to flush all partitions and partition tables | |
1791 | * for a changed scsi disk, and then re-read the new partition table. | |
1792 | * If we are revalidating a disk because of a media change, then we | |
1793 | * enter with usage == 0. If we are using an ioctl, we automatically have | |
1794 | * usage == 1 (we need an open channel to use an ioctl :-), so this | |
1795 | * is our limit. | |
1796 | * | |
1797 | * Changes by Martin Rogge, 9th Aug 1995: | |
1798 | * got cd-roms to work by calling acsi_devinit. There are only two problems: | |
1799 | * First, if there is no medium inserted, the status will remain "changed". | |
1800 | * That is no problem at all, but our design of three-valued logic (medium | |
1801 | * changed, medium not changed, no medium inserted). | |
1802 | * Secondly the check could fail completely and the drive could deliver | |
1803 | * nonsensical data, which could mess up the acsi_info[] structure. In | |
1804 | * that case we try to make the entry safe. | |
1805 | * | |
1806 | */ | |
1807 | ||
1808 | static int acsi_revalidate(struct gendisk *disk) | |
1809 | { | |
1810 | struct acsi_info_struct *aip = disk->private_data; | |
1811 | stdma_lock( NULL, NULL ); | |
1812 | if (acsi_devinit(aip) != DEV_SUPPORTED) { | |
1813 | printk( KERN_ERR "ACSI: revalidate failed for target %d lun %d\n", | |
1814 | aip->target, aip->lun); | |
1815 | aip->size = 0; | |
1816 | aip->read_only = 1; | |
1817 | aip->removable = 1; | |
1818 | aip->changed = 1; /* next acsi_open will try again... */ | |
1819 | } | |
1820 | ||
1821 | ENABLE_IRQ(); | |
1822 | stdma_release(); | |
1823 | set_capacity(disk, aip->size); | |
1824 | return 0; | |
1825 | } |