2 * acsi.c -- Device driver for Atari ACSI hard disks
4 * Copyright 1994 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
6 * Some parts are based on hd.c by Linus Torvalds
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
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 :-(
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.
46 #define MAJOR_NR ACSI_MAJOR
48 #include <linux/config.h>
49 #include <linux/module.h>
50 #include <linux/errno.h>
51 #include <linux/signal.h>
52 #include <linux/sched.h>
53 #include <linux/timer.h>
55 #include <linux/kernel.h>
56 #include <linux/genhd.h>
57 #include <linux/devfs_fs_kernel.h>
58 #include <linux/delay.h>
60 #include <linux/major.h>
61 #include <linux/blk.h>
62 #include <linux/malloc.h>
63 #include <linux/interrupt.h>
64 #include <scsi/scsi.h> /* for SCSI_IOCTL_GET_IDLUN */
65 typedef void Scsi_Device
; /* hack to avoid including scsi.h */
66 #include <scsi/scsi_ioctl.h>
67 #include <linux/hdreg.h> /* for HDIO_GETGEO */
68 #include <linux/blkpg.h>
70 #include <asm/setup.h>
71 #include <asm/pgtable.h>
72 #include <asm/system.h>
73 #include <asm/uaccess.h>
74 #include <asm/atarihw.h>
75 #include <asm/atariints.h>
76 #include <asm/atari_acsi.h>
77 #include <asm/atari_stdma.h>
78 #include <asm/atari_stram.h>
85 #define MAX_ERRORS 8 /* Max read/write errors/sector */
86 #define MAX_LUN 8 /* Max LUNs per target */
89 #define ACSI_BUFFER_SIZE (16*1024) /* "normal" ACSI buffer size */
90 #define ACSI_BUFFER_MINSIZE (2048) /* min. buf size if ext. DMA */
91 #define ACSI_BUFFER_SIZE_ORDER 2 /* order size for above */
92 #define ACSI_BUFFER_MINSIZE_ORDER 0 /* order size for above */
93 #define ACSI_BUFFER_SECTORS (ACSI_BUFFER_SIZE/512)
95 #define ACSI_BUFFER_ORDER \
96 (ATARIHW_PRESENT(EXTD_DMA) ? \
97 ACSI_BUFFER_MINSIZE_ORDER : \
98 ACSI_BUFFER_SIZE_ORDER)
100 #define ACSI_TIMEOUT (4*HZ)
102 /* minimum delay between two commands */
104 #define COMMAND_DELAY 500
107 NONE
, HARDDISK
, CDROM
110 struct acsi_info_struct
{
111 ACSI_TYPE type
; /* type of device */
112 unsigned target
; /* target number */
113 unsigned lun
; /* LUN in target controller */
114 unsigned removable
: 1; /* Flag for removable media */
115 unsigned read_only
: 1; /* Flag for read only devices */
116 unsigned old_atari_disk
: 1; /* Is an old Atari disk */
117 unsigned changed
: 1; /* Medium has been changed */
118 unsigned long size
; /* #blocks */
119 } acsi_info
[MAX_DEV
];
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
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
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.
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
;
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
;
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
;
181 #define ATARI_CAPACITY(sd) \
182 (((int)((sd).cylinders_h<<8)|(sd).cylinders_l) * \
183 (sd).heads * (sd).sectors)
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
;
194 unsigned char page_code
;
195 unsigned char page_size
;
196 unsigned char page_flags
;
197 unsigned char qualifier
;
200 #define SCSI_CAPACITY(sd) ((sd).block_count & 0xffffff)
204 ATARI_SENSE_DATA atari
;
205 SCSI_SENSE_DATA scsi
;
208 #define SENSE_TYPE_UNKNOWN 0
209 #define SENSE_TYPE_ATARI 1
210 #define SENSE_TYPE_SCSI 2
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 : \
219 #define CAPACITY(sd) \
220 (SENSE_TYPE(sd) == SENSE_TYPE_ATARI ? \
221 ATARI_CAPACITY((sd).atari) : \
222 SCSI_CAPACITY((sd).scsi))
224 #define SECTOR_SIZE(sd) \
225 (SENSE_TYPE(sd) == SENSE_TYPE_ATARI ? \
226 (sd).atari.sector_size : \
227 (sd).scsi.sector_size & 0xffffff)
229 /* Default size if capacity cannot be determined (1 GByte) */
230 #define DEFAULT_SIZE 0x1fffff
232 #define CARTRCH_STAT(dev,buf) \
233 (acsi_info[(dev)].old_atari_disk ? \
234 (((buf)[0] & 0x7f) == 0x28) : \
235 ((((buf)[0] & 0x70) == 0x70) ? \
236 (((buf)[2] & 0x0f) == 0x06) : \
237 (((buf)[0] & 0x0f) == 0x06))) \
239 /* These two are also exported to other drivers that work on the ACSI bus and
240 * need an ST-RAM buffer. */
242 unsigned long phys_acsi_buffer
;
244 static int NDevices
= 0;
245 static int acsi_sizes
[MAX_DEV
<<4] = { 0, };
246 static int acsi_blocksizes
[MAX_DEV
<<4] = { 0, };
247 static struct hd_struct acsi_part
[MAX_DEV
<<4] = { {0,0}, };
248 static int access_count
[MAX_DEV
] = { 0, };
249 static char busy
[MAX_DEV
] = { 0, };
250 static DECLARE_WAIT_QUEUE_HEAD(busy_wait
);
252 static int CurrentNReq
;
253 static int CurrentNSect
;
254 static char *CurrentBuffer
;
257 #define SET_TIMER() mod_timer(&acsi_timer, jiffies + ACSI_TIMEOUT)
258 #define CLEAR_TIMER() del_timer(&acsi_timer)
260 static unsigned long STramMask
;
261 #define STRAM_ADDR(a) (((a) & STramMask) == 0)
267 static char tur_cmd
[6] = { 0x00, 0, 0, 0, 0, 0 };
268 static char modesense_cmd
[6] = { 0x1a, 0, 0, 0, 24, 0 };
269 static char modeselect_cmd
[6] = { 0x15, 0, 0, 0, 12, 0 };
270 static char inquiry_cmd
[6] = { 0x12, 0, 0, 0,255, 0 };
271 static char reqsense_cmd
[6] = { 0x03, 0, 0, 0, 4, 0 };
272 static char read_cmd
[6] = { 0x08, 0, 0, 0, 0, 0 };
273 static char write_cmd
[6] = { 0x0a, 0, 0, 0, 0, 0 };
274 static char pa_med_rem_cmd
[6] = { 0x1e, 0, 0, 0, 0, 0 };
276 #define CMDSET_TARG_LUN(cmd,targ,lun) \
278 cmd[0] = (cmd[0] & ~0xe0) | (targ)<<5; \
279 cmd[1] = (cmd[1] & ~0xe0) | (lun)<<5; \
282 #define CMDSET_BLOCK(cmd,blk) \
284 unsigned long __blk = (blk); \
285 cmd[3] = __blk; __blk >>= 8; \
286 cmd[2] = __blk; __blk >>= 8; \
287 cmd[1] = (cmd[1] & 0xe0) | (__blk & 0x1f); \
290 #define CMDSET_LEN(cmd,len) \
295 #define min(a,b) (((a)<(b))?(a):(b))
298 /* ACSI errors (from REQUEST SENSE); There are two tables, one for the
299 * old Atari disks and one for SCSI on ACSI disks.
305 } atari_acsi_errors
[] = {
306 { 0x00, "No error (??)" },
307 { 0x01, "No index pulses" },
308 { 0x02, "Seek not complete" },
309 { 0x03, "Write fault" },
310 { 0x04, "Drive not ready" },
311 { 0x06, "No Track 00 signal" },
312 { 0x10, "ECC error in ID field" },
313 { 0x11, "Uncorrectable data error" },
314 { 0x12, "ID field address mark not found" },
315 { 0x13, "Data field address mark not found" },
316 { 0x14, "Record not found" },
317 { 0x15, "Seek error" },
318 { 0x18, "Data check in no retry mode" },
319 { 0x19, "ECC error during verify" },
320 { 0x1a, "Access to bad block" },
321 { 0x1c, "Unformatted or bad format" },
322 { 0x20, "Invalid command" },
323 { 0x21, "Invalid block address" },
324 { 0x23, "Volume overflow" },
325 { 0x24, "Invalid argument" },
326 { 0x25, "Invalid drive number" },
327 { 0x26, "Byte zero parity check" },
328 { 0x28, "Cartride changed" },
329 { 0x2c, "Error count overflow" },
330 { 0x30, "Controller selftest failed" }
333 scsi_acsi_errors
[] = {
334 { 0x00, "No error (??)" },
335 { 0x01, "Recovered error" },
336 { 0x02, "Drive not ready" },
337 { 0x03, "Uncorrectable medium error" },
338 { 0x04, "Hardware error" },
339 { 0x05, "Illegal request" },
340 { 0x06, "Unit attention (Reset or cartridge changed)" },
341 { 0x07, "Data protection" },
342 { 0x08, "Blank check" },
343 { 0x0b, "Aborted Command" },
344 { 0x0d, "Volume overflow" }
349 /***************************** Prototypes *****************************/
351 static int acsicmd_dma( const char *cmd
, char *buffer
, int blocks
, int
353 static int acsi_reqsense( char *buffer
, int targ
, int lun
);
354 static void acsi_print_error( const unsigned char *errblk
, int dev
);
355 static void acsi_interrupt (int irq
, void *data
, struct pt_regs
*fp
);
356 static void unexpected_acsi_interrupt( void );
357 static void bad_rw_intr( void );
358 static void read_intr( void );
359 static void write_intr( void);
360 static void acsi_times_out( unsigned long dummy
);
361 static void copy_to_acsibuffer( void );
362 static void copy_from_acsibuffer( void );
363 static void do_end_requests( void );
364 static void do_acsi_request( request_queue_t
* );
365 static void redo_acsi_request( void );
366 static int acsi_ioctl( struct inode
*inode
, struct file
*file
, unsigned int
367 cmd
, unsigned long arg
);
368 static int acsi_open( struct inode
* inode
, struct file
* filp
);
369 static int acsi_release( struct inode
* inode
, struct file
* file
);
370 static void acsi_prevent_removal( int target
, int flag
);
371 static int acsi_change_blk_size( int target
, int lun
);
372 static int acsi_mode_sense( int target
, int lun
, SENSE_DATA
*sd
);
373 static void acsi_geninit(void);
374 static int revalidate_acsidisk( int dev
, int maxusage
);
375 static int acsi_revalidate (dev_t
);
377 /************************* End of Prototypes **************************/
380 struct timer_list acsi_timer
= { NULL
, NULL
, 0, 0, acsi_times_out
};
383 #ifdef CONFIG_ATARI_SLM
385 extern int attach_slm( int target
, int lun
);
386 extern int slm_init( void );
392 /***********************************************************************
396 **********************************************************************/
400 * The following two functions wait for _IRQ to become Low or High,
401 * resp., with a timeout. The 'timeout' parameter is in jiffies
403 * If the functions are called with timer interrupts on (int level <
404 * 6), the timeout is based on the 'jiffies' variable to provide exact
405 * timeouts for device probing etc.
406 * If interrupts are disabled, the number of tries is based on the
407 * 'loops_per_sec' variable. A rough estimation is sufficient here...
412 __asm__ __volatile__ ( "movew %/sr,%0" : "=dm" (__sr) ); \
416 int acsi_wait_for_IRQ( unsigned timeout
)
420 unsigned long maxjif
= jiffies
+ timeout
;
421 while (time_before(jiffies
, maxjif
))
422 if (!(mfp
.par_dt_reg
& 0x20)) return( 1 );
425 long tries
= loops_per_sec
/ HZ
/ 8 * timeout
;
426 while( --tries
>= 0 )
427 if (!(mfp
.par_dt_reg
& 0x20)) return( 1 );
429 return( 0 ); /* timeout! */
433 int acsi_wait_for_noIRQ( unsigned timeout
)
437 unsigned long maxjif
= jiffies
+ timeout
;
438 while (time_before(jiffies
, maxjif
))
439 if (mfp
.par_dt_reg
& 0x20) return( 1 );
442 long tries
= loops_per_sec
* timeout
/ HZ
/ 8;
443 while( tries
-- >= 0 )
444 if (mfp
.par_dt_reg
& 0x20) return( 1 );
446 return( 0 ); /* timeout! */
449 static struct timeval start_time
;
452 acsi_delay_start(void)
454 do_gettimeofday(&start_time
);
457 /* wait from acsi_delay_start to now usec (<1E6) usec */
460 acsi_delay_end(long usec
)
462 struct timeval end_time
;
464 do_gettimeofday(&end_time
);
465 deltau
=end_time
.tv_usec
- start_time
.tv_usec
;
466 deltas
=end_time
.tv_sec
- start_time
.tv_sec
;
467 if (deltas
> 1 || deltas
< 0)
476 /* acsicmd_dma() sends an ACSI command and sets up the DMA to transfer
477 * 'blocks' blocks of 512 bytes from/to 'buffer'.
478 * Because the _IRQ signal is used for handshaking the command bytes,
479 * the ACSI interrupt has to be disabled in this function. If the end
480 * of the operation should be signalled by a real interrupt, it has to be
481 * reenabled afterwards.
484 static int acsicmd_dma( const char *cmd
, char *buffer
, int blocks
, int rwflag
, int enable
)
486 { unsigned long flags
, paddr
;
490 if (rwflag
|| *cmd
== 0x0a) {
491 printk( "ACSI: Write commands disabled!\n" );
496 rwflag
= rwflag
? 0x100 : 0;
497 paddr
= virt_to_phys( buffer
);
499 acsi_delay_end(COMMAND_DELAY
);
505 dma_wd
.dma_mode_status
= 0x88 | rwflag
;
508 /* set DMA address */
509 dma_wd
.dma_lo
= (unsigned char)paddr
;
512 dma_wd
.dma_md
= (unsigned char)paddr
;
515 if (ATARIHW_PRESENT(EXTD_DMA
))
516 st_dma_ext_dmahi
= (unsigned short)paddr
;
518 dma_wd
.dma_hi
= (unsigned char)paddr
;
520 restore_flags(flags
);
522 /* send the command bytes except the last */
523 for( i
= 0; i
< 5; ++i
) {
524 DMA_LONG_WRITE( *cmd
++, 0x8a | rwflag
);
526 if (!acsi_wait_for_IRQ( HZ
/2 )) return( 0 ); /* timeout */
529 /* Clear FIFO and switch DMA to correct direction */
530 dma_wd
.dma_mode_status
= 0x92 | (rwflag
^ 0x100);
532 dma_wd
.dma_mode_status
= 0x92 | rwflag
;
535 /* How many sectors for DMA */
536 dma_wd
.fdc_acces_seccount
= blocks
;
539 /* send last command byte */
540 dma_wd
.dma_mode_status
= 0x8a | rwflag
;
542 DMA_LONG_WRITE( *cmd
++, 0x0a | rwflag
);
552 * acsicmd_nodma() sends an ACSI command that requires no DMA.
555 int acsicmd_nodma( const char *cmd
, int enable
)
559 acsi_delay_end(COMMAND_DELAY
);
562 /* send first command byte */
563 dma_wd
.dma_mode_status
= 0x88;
565 DMA_LONG_WRITE( *cmd
++, 0x8a );
567 if (!acsi_wait_for_IRQ( HZ
/2 )) return( 0 ); /* timeout */
569 /* send the intermediate command bytes */
570 for( i
= 0; i
< 4; ++i
) {
571 DMA_LONG_WRITE( *cmd
++, 0x8a );
573 if (!acsi_wait_for_IRQ( HZ
/2 )) return( 0 ); /* timeout */
576 /* send last command byte */
577 DMA_LONG_WRITE( *cmd
++, 0x0a );
583 /* Note that the ACSI interrupt is still disabled after this
584 * function. If you want to get the IRQ delivered, enable it manually!
589 static int acsi_reqsense( char *buffer
, int targ
, int lun
)
592 CMDSET_TARG_LUN( reqsense_cmd
, targ
, lun
);
593 if (!acsicmd_dma( reqsense_cmd
, buffer
, 1, 0, 0 )) return( 0 );
594 if (!acsi_wait_for_IRQ( 10 )) return( 0 );
596 if (!acsicmd_nodma( reqsense_cmd
, 0 )) return( 0 );
597 if (!acsi_wait_for_IRQ( 10 )) return( 0 );
599 if (!acsicmd_nodma( reqsense_cmd
, 0 )) return( 0 );
600 if (!acsi_wait_for_IRQ( 10 )) return( 0 );
602 if (!acsicmd_nodma( reqsense_cmd
, 0 )) return( 0 );
603 if (!acsi_wait_for_IRQ( 10 )) return( 0 );
605 dma_cache_maintenance( virt_to_phys(buffer
), 16, 0 );
612 * ACSI status phase: get the status byte from the bus
614 * I've seen several times that a 0xff status is read, propably due to
615 * a timing error. In this case, the procedure is repeated after the
619 int acsi_getstatus( void )
625 if (!acsi_wait_for_IRQ( 100 )) {
629 dma_wd
.dma_mode_status
= 0x8a;
631 status
= dma_wd
.fdc_acces_seccount
;
632 if (status
!= 0xff) break;
634 printk("ACSI: skipping 0xff status byte\n" );
637 acsi_wait_for_noIRQ( 20 );
639 dma_wd
.dma_mode_status
= 0x80;
641 acsi_wait_for_noIRQ( 20 );
644 return( status
& 0x1f ); /* mask of the device# */
648 #if (defined(CONFIG_ATARI_SLM) || defined(CONFIG_ATARI_SLM_MODULE))
650 /* Receive data in an extended status phase. Needed by SLM printer. */
652 int acsi_extstatus( char *buffer
, int cnt
)
659 if (!acsi_wait_for_IRQ( 40 )) return( 0 );
660 dma_wd
.dma_mode_status
= 0x8a;
662 status
= dma_wd
.fdc_acces_seccount
;
664 *buffer
++ = status
& 0xff;
671 /* Finish an extended status phase */
673 void acsi_end_extstatus( void )
676 dma_wd
.dma_mode_status
= 0x80;
678 acsi_wait_for_noIRQ( 20 );
683 /* Send data in an extended command phase */
685 int acsi_extcmd( unsigned char *buffer
, int cnt
)
689 DMA_LONG_WRITE( *buffer
++, 0x8a );
691 if (!acsi_wait_for_IRQ( HZ
/2 )) return( 0 ); /* timeout */
699 static void acsi_print_error( const unsigned char *errblk
, int dev
)
701 { int atari_err
, i
, errcode
;
702 struct acsi_error
*arr
;
704 atari_err
= acsi_info
[dev
].old_atari_disk
;
706 errcode
= errblk
[0] & 0x7f;
708 if ((errblk
[0] & 0x70) == 0x70)
709 errcode
= errblk
[2] & 0x0f;
711 errcode
= errblk
[0] & 0x0f;
713 printk( KERN_ERR
"ACSI error 0x%02x", errcode
);
715 if (errblk
[0] & 0x80)
716 printk( " for sector %d",
717 ((errblk
[1] & 0x1f) << 16) |
718 (errblk
[2] << 8) | errblk
[0] );
720 arr
= atari_err
? atari_acsi_errors
: scsi_acsi_errors
;
721 i
= atari_err
? sizeof(atari_acsi_errors
)/sizeof(*atari_acsi_errors
) :
722 sizeof(scsi_acsi_errors
)/sizeof(*scsi_acsi_errors
);
724 for( --i
; i
>= 0; --i
)
725 if (arr
[i
].code
== errcode
) break;
727 printk( ": %s\n", arr
[i
].text
);
730 /*******************************************************************
732 * ACSI interrupt routine
733 * Test, if this is a ACSI interrupt and call the irq handler
734 * Otherwise ignore this interrupt.
736 *******************************************************************/
738 static void acsi_interrupt(int irq
, void *data
, struct pt_regs
*fp
)
740 { void (*acsi_irq_handler
)(void) = DEVICE_INTR
;
745 if (!acsi_irq_handler
)
746 acsi_irq_handler
= unexpected_acsi_interrupt
;
751 /******************************************************************
753 * The Interrupt handlers
755 *******************************************************************/
758 static void unexpected_acsi_interrupt( void )
761 printk( KERN_WARNING
"Unexpected ACSI interrupt\n" );
765 /* This function is called in case of errors. Because we cannot reset
766 * the ACSI bus or a single device, there is no other choice than
767 * retrying several times :-(
770 static void bad_rw_intr( void )
776 if (++CURRENT
->errors
>= MAX_ERRORS
)
778 /* Otherwise just retry */
782 static void read_intr( void )
786 status
= acsi_getstatus();
788 int dev
= DEVICE_NR(MINOR(CURRENT
->rq_dev
));
789 printk( KERN_ERR
"ad%c: ", dev
+'a' );
790 if (!acsi_reqsense( acsi_buffer
, acsi_info
[dev
].target
,
792 printk( "ACSI error and REQUEST SENSE failed (status=0x%02x)\n", status
);
794 acsi_print_error( acsi_buffer
, dev
);
795 if (CARTRCH_STAT( dev
, acsi_buffer
))
796 acsi_info
[dev
].changed
= 1;
804 dma_cache_maintenance( virt_to_phys(CurrentBuffer
), CurrentNSect
*512, 0 );
805 if (CurrentBuffer
== acsi_buffer
)
806 copy_from_acsibuffer();
813 static void write_intr(void)
817 status
= acsi_getstatus();
819 int dev
= DEVICE_NR(MINOR(CURRENT
->rq_dev
));
820 printk( KERN_ERR
"ad%c: ", dev
+'a' );
821 if (!acsi_reqsense( acsi_buffer
, acsi_info
[dev
].target
,
823 printk( "ACSI error and REQUEST SENSE failed (status=0x%02x)\n", status
);
825 acsi_print_error( acsi_buffer
, dev
);
826 if (CARTRCH_STAT( dev
, acsi_buffer
))
827 acsi_info
[dev
].changed
= 1;
839 static void acsi_times_out( unsigned long dummy
)
843 if (!DEVICE_INTR
) return;
846 printk( KERN_ERR
"ACSI timeout\n" );
847 if (QUEUE_EMPTY
) return;
848 if (++CURRENT
->errors
>= MAX_ERRORS
) {
850 printk( KERN_ERR
"ACSI: too many errors.\n" );
860 /***********************************************************************
862 * Scatter-gather utility functions
864 ***********************************************************************/
867 static void copy_to_acsibuffer( void )
871 struct buffer_head
*bh
;
873 src
= CURRENT
->buffer
;
878 memcpy( dst
, src
, CurrentNSect
*512 );
880 for( i
= 0; i
< CurrentNReq
; ++i
) {
881 memcpy( dst
, src
, bh
->b_size
);
883 if ((bh
= bh
->b_reqnext
))
889 static void copy_from_acsibuffer( void )
893 struct buffer_head
*bh
;
895 dst
= CURRENT
->buffer
;
900 memcpy( dst
, src
, CurrentNSect
*512 );
902 for( i
= 0; i
< CurrentNReq
; ++i
) {
903 memcpy( dst
, src
, bh
->b_size
);
905 if ((bh
= bh
->b_reqnext
))
911 static void do_end_requests( void )
916 CURRENT
->nr_sectors
-= CurrentNSect
;
917 CURRENT
->current_nr_sectors
-= CurrentNSect
;
918 CURRENT
->sector
+= CurrentNSect
;
919 if (CURRENT
->nr_sectors
== 0)
923 for( i
= 0; i
< CurrentNReq
; ++i
) {
924 n
= CURRENT
->bh
->b_size
>> 9;
925 CURRENT
->nr_sectors
-= n
;
926 CURRENT
->current_nr_sectors
-= n
;
927 CURRENT
->sector
+= n
;
936 /***********************************************************************
938 * do_acsi_request and friends
940 ***********************************************************************/
942 static void do_acsi_request( request_queue_t
* q
)
945 stdma_lock( acsi_interrupt
, NULL
);
950 static void redo_acsi_request( void )
952 { unsigned block
, dev
, target
, lun
, nsect
;
954 unsigned long pbuffer
;
955 struct buffer_head
*bh
;
957 if (!QUEUE_EMPTY
&& CURRENT
->rq_status
== RQ_INACTIVE
) {
970 /* Another check here: An interrupt or timer event could have
971 * happened since the last check!
973 if (!QUEUE_EMPTY
&& CURRENT
->rq_status
== RQ_INACTIVE
) {
990 if (MAJOR(CURRENT
->rq_dev
) != MAJOR_NR
)
991 panic(DEVICE_NAME
": request list destroyed");
993 if (!CURRENT
->bh
&& !buffer_locked(CURRENT
->bh
))
994 panic(DEVICE_NAME
": block not locked");
997 dev
= MINOR(CURRENT
->rq_dev
);
998 block
= CURRENT
->sector
;
999 if (DEVICE_NR(dev
) >= NDevices
||
1000 block
+CURRENT
->nr_sectors
>= acsi_part
[dev
].nr_sects
) {
1002 printk( "ad%c: attempted access for blocks %d...%ld past end of device at block %ld.\n",
1004 block
, block
+ CURRENT
->nr_sectors
- 1,
1005 acsi_part
[dev
].nr_sects
);
1010 if (acsi_info
[DEVICE_NR(dev
)].changed
) {
1011 printk( KERN_NOTICE
"ad%c: request denied because cartridge has "
1012 "been changed.\n", DEVICE_NR(dev
)+'a' );
1017 block
+= acsi_part
[dev
].start_sect
;
1018 target
= acsi_info
[DEVICE_NR(dev
)].target
;
1019 lun
= acsi_info
[DEVICE_NR(dev
)].lun
;
1021 /* Find out how many sectors should be transferred from/to
1022 * consecutive buffers and thus can be done with a single command.
1024 buffer
= CURRENT
->buffer
;
1025 pbuffer
= virt_to_phys(buffer
);
1026 nsect
= CURRENT
->current_nr_sectors
;
1029 if ((bh
= CURRENT
->bh
) && bh
!= CURRENT
->bhtail
) {
1030 if (!STRAM_ADDR(pbuffer
)) {
1031 /* If transfer is done via the ACSI buffer anyway, we can
1032 * assemble as much bh's as fit in the buffer.
1034 while( (bh
= bh
->b_reqnext
) ) {
1035 if (nsect
+ (bh
->b_size
>>9) > ACSI_BUFFER_SECTORS
) break;
1036 nsect
+= bh
->b_size
>> 9;
1038 if (bh
== CURRENT
->bhtail
) break;
1040 buffer
= acsi_buffer
;
1041 pbuffer
= phys_acsi_buffer
;
1044 unsigned long pendadr
, pnewadr
;
1045 pendadr
= pbuffer
+ nsect
*512;
1046 while( (bh
= bh
->b_reqnext
) ) {
1047 pnewadr
= virt_to_phys(bh
->b_data
);
1048 if (!STRAM_ADDR(pnewadr
) || pendadr
!= pnewadr
) break;
1049 nsect
+= bh
->b_size
>> 9;
1050 pendadr
= pnewadr
+ bh
->b_size
;
1052 if (bh
== CURRENT
->bhtail
) break;
1057 if (!STRAM_ADDR(pbuffer
)) {
1058 buffer
= acsi_buffer
;
1059 pbuffer
= phys_acsi_buffer
;
1060 if (nsect
> ACSI_BUFFER_SECTORS
)
1061 nsect
= ACSI_BUFFER_SECTORS
;
1064 CurrentBuffer
= buffer
;
1065 CurrentNSect
= nsect
;
1067 if (CURRENT
->cmd
== WRITE
) {
1068 CMDSET_TARG_LUN( write_cmd
, target
, lun
);
1069 CMDSET_BLOCK( write_cmd
, block
);
1070 CMDSET_LEN( write_cmd
, nsect
);
1071 if (buffer
== acsi_buffer
)
1072 copy_to_acsibuffer();
1073 dma_cache_maintenance( pbuffer
, nsect
*512, 1 );
1074 SET_INTR(write_intr
);
1075 if (!acsicmd_dma( write_cmd
, buffer
, nsect
, 1, 1)) {
1077 printk( KERN_ERR
"ACSI (write): Timeout in command block\n" );
1084 if (CURRENT
->cmd
== READ
) {
1085 CMDSET_TARG_LUN( read_cmd
, target
, lun
);
1086 CMDSET_BLOCK( read_cmd
, block
);
1087 CMDSET_LEN( read_cmd
, nsect
);
1088 SET_INTR(read_intr
);
1089 if (!acsicmd_dma( read_cmd
, buffer
, nsect
, 0, 1)) {
1091 printk( KERN_ERR
"ACSI (read): Timeout in command block\n" );
1098 panic("unknown ACSI command");
1103 /***********************************************************************
1105 * Misc functions: ioctl, open, release, check_change, ...
1107 ***********************************************************************/
1110 static int acsi_ioctl( struct inode
*inode
, struct file
*file
,
1111 unsigned int cmd
, unsigned long arg
)
1116 dev
= DEVICE_NR(MINOR(inode
->i_rdev
));
1117 if (dev
>= NDevices
)
1121 /* HDIO_GETGEO is supported more for getting the partition's
1122 * start sector... */
1123 { struct hd_geometry
*geo
= (struct hd_geometry
*)arg
;
1124 /* just fake some geometry here, it's nonsense anyway; to make it
1125 * easy, use Adaptec's usual 64/32 mapping */
1126 put_user( 64, &geo
->heads
);
1127 put_user( 32, &geo
->sectors
);
1128 put_user( acsi_info
[dev
].size
>> 11, &geo
->cylinders
);
1129 put_user( acsi_part
[MINOR(inode
->i_rdev
)].start_sect
, &geo
->start
);
1133 case SCSI_IOCTL_GET_IDLUN
:
1134 /* SCSI compatible GET_IDLUN call to get target's ID and LUN number */
1135 put_user( acsi_info
[dev
].target
| (acsi_info
[dev
].lun
<< 8),
1136 &((Scsi_Idlun
*) arg
)->dev_id
);
1137 put_user( 0, &((Scsi_Idlun
*) arg
)->host_unique_id
);
1140 case BLKGETSIZE
: /* Return device size */
1141 return put_user(acsi_part
[MINOR(inode
->i_rdev
)].nr_sects
,
1148 return blk_ioctl(inode
->i_rdev
, cmd
, arg
);
1150 case BLKRRPART
: /* Re-read partition tables */
1151 if (!capable(CAP_SYS_ADMIN
))
1153 return revalidate_acsidisk(inode
->i_rdev
, 1);
1162 * Open a device, check for read-only and lock the medium if it is
1165 * Changes by Martin Rogge, 9th Aug 1995:
1166 * Check whether check_disk_change (and therefore revalidate_acsidisk)
1167 * was successful. They fail when there is no medium in the drive.
1169 * The problem of media being changed during an operation can be
1170 * ignored because of the prevent_removal code.
1172 * Added check for the validity of the device number.
1176 static int acsi_open( struct inode
* inode
, struct file
* filp
)
1179 struct acsi_info_struct
*aip
;
1181 device
= DEVICE_NR(MINOR(inode
->i_rdev
));
1182 if (device
>= NDevices
)
1184 aip
= &acsi_info
[device
];
1185 while (busy
[device
])
1186 sleep_on(&busy_wait
);
1188 if (access_count
[device
] == 0 && aip
->removable
) {
1190 aip
->changed
= 1; /* safety first */
1192 check_disk_change( inode
->i_rdev
);
1193 if (aip
->changed
) /* revalidate was not successful (no medium) */
1195 acsi_prevent_removal(device
, 1);
1197 access_count
[device
]++;
1200 if (filp
&& filp
->f_mode
) {
1201 check_disk_change( inode
->i_rdev
);
1202 if (filp
->f_mode
& 2) {
1203 if (aip
->read_only
) {
1204 acsi_release( inode
, filp
);
1214 * Releasing a block device means we sync() it, so that it can safely
1215 * be forgotten about...
1218 static int acsi_release( struct inode
* inode
, struct file
* file
)
1220 int device
= DEVICE_NR(MINOR(inode
->i_rdev
));
1221 if (--access_count
[device
] == 0 && acsi_info
[device
].removable
)
1222 acsi_prevent_removal(device
, 0);
1228 * Prevent or allow a media change for removable devices.
1231 static void acsi_prevent_removal(int device
, int flag
)
1233 stdma_lock( NULL
, NULL
);
1235 CMDSET_TARG_LUN(pa_med_rem_cmd
, acsi_info
[device
].target
,
1236 acsi_info
[device
].lun
);
1237 CMDSET_LEN( pa_med_rem_cmd
, flag
);
1239 if (acsicmd_nodma(pa_med_rem_cmd
, 0) && acsi_wait_for_IRQ(3*HZ
))
1241 /* Do not report errors -- some devices may not know this command. */
1247 static int acsi_media_change (dev_t dev
)
1249 int device
= DEVICE_NR(MINOR(dev
));
1250 struct acsi_info_struct
*aip
;
1252 aip
= &acsi_info
[device
];
1253 if (!aip
->removable
)
1257 /* We can be sure that the medium has been changed -- REQUEST
1258 * SENSE has reported this earlier.
1262 /* If the flag isn't set, make a test by reading block 0.
1263 * If errors happen, it seems to be better to say "changed"...
1265 stdma_lock( NULL
, NULL
);
1266 CMDSET_TARG_LUN(read_cmd
, aip
->target
, aip
->lun
);
1267 CMDSET_BLOCK( read_cmd
, 0 );
1268 CMDSET_LEN( read_cmd
, 1 );
1269 if (acsicmd_dma(read_cmd
, acsi_buffer
, 1, 0, 0) &&
1270 acsi_wait_for_IRQ(3*HZ
)) {
1271 if (acsi_getstatus()) {
1272 if (acsi_reqsense(acsi_buffer
, aip
->target
, aip
->lun
)) {
1273 if (CARTRCH_STAT(device
, acsi_buffer
))
1277 printk( KERN_ERR
"ad%c: REQUEST SENSE failed in test for "
1278 "medium change; assuming a change\n", device
+ 'a' );
1284 printk( KERN_ERR
"ad%c: Test for medium changed timed out; "
1285 "assuming a change\n", device
+ 'a');
1291 /* Now, after reading a block, the changed status is surely valid. */
1292 return aip
->changed
;
1296 static int acsi_change_blk_size( int target
, int lun
)
1300 for (i
=0; i
<12; i
++)
1304 acsi_buffer
[10] = 2;
1305 CMDSET_TARG_LUN( modeselect_cmd
, target
, lun
);
1307 if (!acsicmd_dma( modeselect_cmd
, acsi_buffer
, 1,1,0) ||
1308 !acsi_wait_for_IRQ( 3*HZ
) ||
1309 acsi_getstatus() != 0 ) {
1316 static int acsi_mode_sense( int target
, int lun
, SENSE_DATA
*sd
)
1321 CMDSET_TARG_LUN( modesense_cmd
, target
, lun
);
1322 for (page
=0; page
<4; page
++) {
1323 modesense_cmd
[2] = page
;
1324 if (!acsicmd_dma( modesense_cmd
, acsi_buffer
, 1, 0, 0 ) ||
1325 !acsi_wait_for_IRQ( 3*HZ
) ||
1329 /* read twice to jump over the second 16-byte border! */
1331 if (acsi_wait_for_noIRQ( 20 ) &&
1332 acsicmd_nodma( modesense_cmd
, 0 ) &&
1333 acsi_wait_for_IRQ( 3*HZ
) &&
1334 acsi_getstatus() == 0)
1341 dma_cache_maintenance( phys_acsi_buffer
, sizeof(SENSE_DATA
), 0 );
1342 *sd
= *(SENSE_DATA
*)acsi_buffer
;
1344 /* Validity check, depending on type of data */
1346 switch( SENSE_TYPE(*sd
) ) {
1348 case SENSE_TYPE_ATARI
:
1349 if (CAPACITY(*sd
) == 0)
1353 case SENSE_TYPE_SCSI
:
1354 if (sd
->scsi
.descriptor_size
!= 8)
1358 case SENSE_TYPE_UNKNOWN
:
1360 printk( KERN_ERR
"ACSI target %d, lun %d: Cannot interpret "
1361 "sense data\n", target
, lun
);
1367 printk( "Mode sense data for ACSI target %d, lun %d seem not valid:",
1369 for( i
= 0; i
< sizeof(SENSE_DATA
); ++i
)
1370 printk( "%02x ", (unsigned char)acsi_buffer
[i
] );
1382 /*******************************************************************
1386 ********************************************************************/
1389 extern struct block_device_operations acsi_fops
;
1391 static struct gendisk acsi_gendisk
= {
1392 MAJOR_NR
, /* Major number */
1393 "ad", /* Major name */
1394 4, /* Bits to shift to get real from partition */
1395 1 << 4, /* Number of partitions per real */
1396 acsi_part
, /* hd struct */
1397 acsi_sizes
, /* block sizes */
1399 (void *)acsi_info
, /* internal */
1401 &acsi_fops
, /* file operations */
1404 #define MAX_SCSI_DEVICE_CODE 10
1406 static const char *const scsi_device_types
[MAX_SCSI_DEVICE_CODE
] =
1409 "Sequential-Access",
1420 static void print_inquiry(unsigned char *data
)
1424 printk(KERN_INFO
" Vendor: ");
1425 for (i
= 8; i
< 16; i
++)
1427 if (data
[i
] >= 0x20 && i
< data
[4] + 5)
1428 printk("%c", data
[i
]);
1434 for (i
= 16; i
< 32; i
++)
1436 if (data
[i
] >= 0x20 && i
< data
[4] + 5)
1437 printk("%c", data
[i
]);
1443 for (i
= 32; i
< 36; i
++)
1445 if (data
[i
] >= 0x20 && i
< data
[4] + 5)
1446 printk("%c", data
[i
]);
1455 printk(KERN_INFO
" Type: %s ", (i
< MAX_SCSI_DEVICE_CODE
1456 ? scsi_device_types
[i
]
1458 printk(" ANSI SCSI revision: %02x", data
[2] & 0x07);
1459 if ((data
[2] & 0x07) == 1 && (data
[3] & 0x0f) == 1)
1467 * Changes by Martin Rogge, 9th Aug 1995:
1468 * acsi_devinit has been taken out of acsi_geninit, because it needs
1469 * to be called from revalidate_acsidisk. The result of request sense
1470 * is now checked for DRIVE NOT READY.
1472 * The structure *aip is only valid when acsi_devinit returns
1478 #define DEV_UNKNOWN 1
1479 #define DEV_SUPPORTED 2
1482 static int acsi_devinit(struct acsi_info_struct
*aip
)
1484 int status
, got_inquiry
;
1486 unsigned char reqsense
, extsense
;
1488 /*****************************************************************/
1489 /* Do a TEST UNIT READY command to test the presence of a device */
1490 /*****************************************************************/
1492 CMDSET_TARG_LUN(tur_cmd
, aip
->target
, aip
->lun
);
1493 if (!acsicmd_nodma(tur_cmd
, 0)) {
1494 /* timed out -> no device here */
1496 printk("target %d lun %d: timeout\n", aip
->target
, aip
->lun
);
1501 /*************************/
1502 /* Read the ACSI status. */
1503 /*************************/
1505 status
= acsi_getstatus();
1507 if (status
== 0x12) {
1508 /* The SLM printer should be the only device that
1509 * responds with the error code in the status byte. In
1510 * correct status bytes, bit 4 is never set.
1512 printk( KERN_INFO
"Detected SLM printer at id %d lun %d\n",
1513 aip
->target
, aip
->lun
);
1516 /* ignore CHECK CONDITION, since some devices send a
1518 if ((status
& 0x1e) != 0x2) {
1520 printk("target %d lun %d: status %d\n",
1521 aip
->target
, aip
->lun
, status
);
1527 /*******************************/
1528 /* Do a REQUEST SENSE command. */
1529 /*******************************/
1531 if (!acsi_reqsense(acsi_buffer
, aip
->target
, aip
->lun
)) {
1532 printk( KERN_WARNING
"acsi_reqsense failed\n");
1534 acsi_buffer
[2] = UNIT_ATTENTION
;
1536 reqsense
= acsi_buffer
[0];
1537 extsense
= acsi_buffer
[2] & 0xf;
1539 if ((reqsense
& 0x70) == 0x70) { /* extended sense */
1540 if (extsense
!= UNIT_ATTENTION
&&
1541 extsense
!= NOT_READY
) {
1543 printk("target %d lun %d: extended sense %d\n",
1544 aip
->target
, aip
->lun
, extsense
);
1550 if (reqsense
& 0x7f) {
1552 printk("target %d lun %d: sense %d\n",
1553 aip
->target
, aip
->lun
, reqsense
);
1560 if (reqsense
== 0x4) { /* SH204 Bug workaround */
1562 printk("target %d lun %d status=0 sense=4\n",
1563 aip
->target
, aip
->lun
);
1568 /***********************************************************/
1569 /* Do an INQUIRY command to get more infos on this device. */
1570 /***********************************************************/
1572 /* Assume default values */
1575 aip
->old_atari_disk
= 0;
1576 aip
->changed
= (extsense
== NOT_READY
); /* medium inserted? */
1577 aip
->size
= DEFAULT_SIZE
;
1579 /* Fake inquiry result for old atari disks */
1580 memcpy(acsi_buffer
, "\000\000\001\000 Adaptec 40xx"
1582 CMDSET_TARG_LUN(inquiry_cmd
, aip
->target
, aip
->lun
);
1583 if (acsicmd_dma(inquiry_cmd
, acsi_buffer
, 1, 0, 0) &&
1584 acsi_getstatus() == 0) {
1585 acsicmd_nodma(inquiry_cmd
, 0);
1587 dma_cache_maintenance( phys_acsi_buffer
, 256, 0 );
1589 aip
->removable
= !!(acsi_buffer
[1] & 0x80);
1591 if (aip
->type
== NONE
) /* only at boot time */
1592 print_inquiry(acsi_buffer
);
1593 switch(acsi_buffer
[0]) {
1595 aip
->type
= HARDDISK
;
1604 /****************************/
1605 /* Do a MODE SENSE command. */
1606 /****************************/
1608 if (!acsi_mode_sense(aip
->target
, aip
->lun
, &sense
)) {
1609 printk( KERN_WARNING
"No mode sense data.\n" );
1612 if ((SECTOR_SIZE(sense
) != 512) &&
1613 ((aip
->type
!= CDROM
) ||
1614 !acsi_change_blk_size(aip
->target
, aip
->lun
) ||
1615 !acsi_mode_sense(aip
->target
, aip
->lun
, &sense
) ||
1616 (SECTOR_SIZE(sense
) != 512))) {
1617 printk( KERN_WARNING
"Sector size != 512 not supported.\n" );
1620 /* There are disks out there that claim to have 0 sectors... */
1621 if (CAPACITY(sense
))
1622 aip
->size
= CAPACITY(sense
); /* else keep DEFAULT_SIZE */
1623 if (!got_inquiry
&& SENSE_TYPE(sense
) == SENSE_TYPE_ATARI
) {
1624 /* If INQUIRY failed and the sense data suggest an old
1625 * Atari disk (SH20x, Megafile), the disk is not removable
1628 aip
->old_atari_disk
= 1;
1631 /******************/
1632 /* We've done it. */
1633 /******************/
1635 return DEV_SUPPORTED
;
1638 EXPORT_SYMBOL(acsi_delay_start
);
1639 EXPORT_SYMBOL(acsi_delay_end
);
1640 EXPORT_SYMBOL(acsi_wait_for_IRQ
);
1641 EXPORT_SYMBOL(acsi_wait_for_noIRQ
);
1642 EXPORT_SYMBOL(acsicmd_nodma
);
1643 EXPORT_SYMBOL(acsi_getstatus
);
1644 EXPORT_SYMBOL(acsi_buffer
);
1645 EXPORT_SYMBOL(phys_acsi_buffer
);
1647 #ifdef CONFIG_ATARI_SLM_MODULE
1648 void acsi_attach_SLMs( int (*attach_func
)( int, int ) );
1650 EXPORT_SYMBOL(acsi_extstatus
);
1651 EXPORT_SYMBOL(acsi_end_extstatus
);
1652 EXPORT_SYMBOL(acsi_extcmd
);
1653 EXPORT_SYMBOL(acsi_attach_SLMs
);
1655 /* to remember IDs of SLM devices, SLM module is loaded later
1656 * (index is target#, contents is lun#, -1 means "no SLM") */
1660 static struct block_device_operations acsi_fops
= {
1662 release
: acsi_release
,
1664 check_media_change
: acsi_media_change
,
1665 revalidate
: acsi_revalidate
,
1668 static void acsi_geninit(void)
1671 struct acsi_info_struct
*aip
;
1672 #ifdef CONFIG_ATARI_SLM
1676 printk( KERN_INFO
"Probing ACSI devices:\n" );
1678 #ifdef CONFIG_ATARI_SLM_MODULE
1679 for( i
= 0; i
< 8; ++i
)
1680 SLM_devices
[i
] = -1;
1682 stdma_lock(NULL
, NULL
);
1684 for (target
= 0; target
< 8 && NDevices
< MAX_DEV
; ++target
) {
1687 aip
= &acsi_info
[NDevices
];
1689 aip
->target
= target
;
1691 i
= acsi_devinit(aip
);
1694 printk( KERN_INFO
"Detected ");
1695 switch (aip
->type
) {
1704 printk(" ad%c at id %d lun %d ",
1705 'a' + NDevices
, target
, lun
);
1707 printk("(removable) ");
1709 printk("(read-only) ");
1710 if (aip
->size
== DEFAULT_SIZE
)
1711 printk(" unkown size, using default ");
1712 printk("%ld MByte\n",
1713 (aip
->size
*512+1024*1024/2)/(1024*1024));
1717 #ifdef CONFIG_ATARI_SLM
1718 n_slm
+= attach_slm( target
, lun
);
1721 #ifdef CONFIG_ATARI_SLM_MODULE
1722 SLM_devices
[target
] = lun
;
1725 /* neither of the above: fall through to unknown device */
1727 printk( KERN_INFO
"Detected unsupported device at "
1728 "id %d lun %d\n", target
, lun
);
1732 #ifdef CONFIG_ACSI_MULTI_LUN
1733 while (i
!= DEV_NONE
&& ++lun
< MAX_LUN
);
1739 /* reenable interrupt */
1743 #ifndef CONFIG_ATARI_SLM
1744 printk( KERN_INFO
"Found %d ACSI device(s) total.\n", NDevices
);
1746 printk( KERN_INFO
"Found %d ACSI device(s) and %d SLM printer(s) total.\n",
1750 for( i
= 0; i
< (MAX_DEV
<< 4); i
++ )
1751 acsi_blocksizes
[i
] = 1024;
1752 blksize_size
[MAJOR_NR
] = acsi_blocksizes
;
1753 for( i
= 0; i
< NDevices
; ++i
)
1754 register_disk(&acsi_gendisk
, MKDEV(MAJOR_NR
,i
<<4),
1755 (acsi_info
[i
].type
==HARDDISK
)?1<<4:1,
1758 acsi_gendisk
.nr_real
= NDevices
;
1761 #ifdef CONFIG_ATARI_SLM_MODULE
1762 /* call attach_slm() for each device that is a printer; needed for init of SLM
1763 * driver as a module, since it's not yet present if acsi.c is inited and thus
1764 * the bus gets scanned. */
1765 void acsi_attach_SLMs( int (*attach_func
)( int, int ) )
1769 for( i
= 0; i
< 8; ++i
)
1770 if (SLM_devices
[i
] >= 0)
1771 n
+= (*attach_func
)( i
, SLM_devices
[i
] );
1772 printk( KERN_INFO
"Found %d SLM printer(s) total.\n", n
);
1774 #endif /* CONFIG_ATARI_SLM_MODULE */
1777 int acsi_init( void )
1781 if (!MACH_IS_ATARI
|| !ATARIHW_PRESENT(ACSI
))
1783 if (devfs_register_blkdev( MAJOR_NR
, "ad", &acsi_fops
)) {
1784 printk( KERN_ERR
"Unable to get major %d for ACSI\n", MAJOR_NR
);
1788 (char *)atari_stram_alloc( ACSI_BUFFER_SIZE
, NULL
, "acsi" ))) {
1789 printk( KERN_ERR
"Unable to get ACSI ST-Ram buffer.\n" );
1790 devfs_unregister_blkdev( MAJOR_NR
, "ad" );
1793 phys_acsi_buffer
= virt_to_phys( acsi_buffer
);
1794 STramMask
= ATARIHW_PRESENT(EXTD_DMA
) ? 0x00000000 : 0xff000000;
1796 blk_init_queue(BLK_DEFAULT_QUEUE(MAJOR_NR
), DEVICE_REQUEST
);
1797 read_ahead
[MAJOR_NR
] = 8; /* 8 sector (4kB) read-ahead */
1798 acsi_gendisk
.next
= gendisk_head
;
1799 gendisk_head
= &acsi_gendisk
;
1801 #ifdef CONFIG_ATARI_SLM
1811 int init_module(void)
1815 if ((err
= acsi_init()))
1817 printk( KERN_INFO
"ACSI driver loaded as module.\n");
1821 void cleanup_module(void)
1823 struct gendisk
** gdp
;
1825 del_timer( &acsi_timer
);
1826 blk_cleanup_queue(BLK_DEFAULT_QUEUE(MAJOR_NR
));
1827 atari_stram_free( acsi_buffer
);
1829 if (devfs_unregister_blkdev( MAJOR_NR
, "ad" ) != 0)
1830 printk( KERN_ERR
"acsi: cleanup_module failed\n");
1832 for (gdp
= &gendisk_head
; *gdp
; gdp
= &((*gdp
)->next
))
1833 if (*gdp
== &acsi_gendisk
)
1836 printk( KERN_ERR
"acsi: entry in disk chain missing!\n" );
1838 *gdp
= (*gdp
)->next
;
1842 #define DEVICE_BUSY busy[device]
1843 #define USAGE access_count[device]
1844 #define GENDISK_STRUCT acsi_gendisk
1847 * This routine is called to flush all partitions and partition tables
1848 * for a changed scsi disk, and then re-read the new partition table.
1849 * If we are revalidating a disk because of a media change, then we
1850 * enter with usage == 0. If we are using an ioctl, we automatically have
1851 * usage == 1 (we need an open channel to use an ioctl :-), so this
1854 * Changes by Martin Rogge, 9th Aug 1995:
1855 * got cd-roms to work by calling acsi_devinit. There are only two problems:
1856 * First, if there is no medium inserted, the status will remain "changed".
1857 * That is no problem at all, but our design of three-valued logic (medium
1858 * changed, medium not changed, no medium inserted).
1859 * Secondly the check could fail completely and the drive could deliver
1860 * nonsensical data, which could mess up the acsi_info[] structure. In
1861 * that case we try to make the entry safe.
1865 static int revalidate_acsidisk( int dev
, int maxusage
)
1868 struct gendisk
* gdev
;
1869 int max_p
, start
, i
;
1870 struct acsi_info_struct
*aip
;
1872 device
= DEVICE_NR(MINOR(dev
));
1873 aip
= &acsi_info
[device
];
1874 gdev
= &GENDISK_STRUCT
;
1877 if (DEVICE_BUSY
|| USAGE
> maxusage
) {
1884 max_p
= gdev
->max_p
;
1885 start
= device
<< gdev
->minor_shift
;
1887 for( i
= max_p
- 1; i
>= 0 ; i
-- ) {
1888 if (gdev
->part
[start
+ i
].nr_sects
!= 0) {
1889 kdev_t devp
= MKDEV(MAJOR_NR
, start
+ i
);
1890 struct super_block
*sb
= get_super(devp
);
1894 invalidate_inodes(sb
);
1895 invalidate_buffers(devp
);
1896 gdev
->part
[start
+ i
].nr_sects
= 0;
1898 gdev
->part
[start
+i
].start_sect
= 0;
1901 stdma_lock( NULL
, NULL
);
1903 if (acsi_devinit(aip
) != DEV_SUPPORTED
) {
1904 printk( KERN_ERR
"ACSI: revalidate failed for target %d lun %d\n",
1905 aip
->target
, aip
->lun
);
1909 aip
->changed
= 1; /* next acsi_open will try again... */
1915 grok_partitions(gdev
, device
, (aip
->type
==HARDDISK
)?1<<4:1, aip
->size
);
1918 wake_up(&busy_wait
);
1923 static int acsi_revalidate (dev_t dev
)
1925 return revalidate_acsidisk (dev
, 0);