1827 lines
45 KiB
C
1827 lines
45 KiB
C
/*
|
||
* acsi.c -- Device driver for Atari ACSI hard disks
|
||
*
|
||
* Copyright 1994 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
|
||
*
|
||
* Some parts are based on hd.c by Linus Torvalds
|
||
*
|
||
* This file is subject to the terms and conditions of the GNU General Public
|
||
* License. See the file COPYING in the main directory of this archive for
|
||
* more details.
|
||
*
|
||
*/
|
||
|
||
/*
|
||
* Still to in this file:
|
||
* - If a command ends with an error status (!= 0), the following
|
||
* REQUEST SENSE commands (4 to fill the ST-DMA FIFO) are done by
|
||
* polling the _IRQ signal (not interrupt-driven). This should be
|
||
* avoided in future because it takes up a non-neglectible time in
|
||
* the interrupt service routine while interrupts are disabled.
|
||
* Maybe a timer interrupt will get lost :-(
|
||
*/
|
||
|
||
/*
|
||
* General notes:
|
||
*
|
||
* - All ACSI devices (disks, CD-ROMs, ...) use major number 28.
|
||
* Minors are organized like it is with SCSI: The upper 4 bits
|
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* identify the device, the lower 4 bits the partition.
|
||
* The device numbers (the upper 4 bits) are given in the same
|
||
* order as the devices are found on the bus.
|
||
* - Up to 8 LUNs are supported for each target (if CONFIG_ACSI_MULTI_LUN
|
||
* is defined), but only a total of 16 devices (due to minor
|
||
* numbers...). Note that Atari allows only a maximum of 4 targets
|
||
* (i.e. controllers, not devices) on the ACSI bus!
|
||
* - A optimizing scheme similar to SCSI scatter-gather is implemented.
|
||
* - Removable media are supported. After a medium change to device
|
||
* is reinitialized (partition check etc.). Also, if the device
|
||
* knows the PREVENT/ALLOW MEDIUM REMOVAL command, the door should
|
||
* be locked and unlocked when mounting the first or unmounting the
|
||
* last filesystem on the device. The code is untested, because I
|
||
* don't have a removable hard disk.
|
||
*
|
||
*/
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||
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||
#include <linux/module.h>
|
||
#include <linux/errno.h>
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||
#include <linux/signal.h>
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||
#include <linux/sched.h>
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||
#include <linux/timer.h>
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||
#include <linux/fs.h>
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||
#include <linux/kernel.h>
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#include <linux/genhd.h>
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#include <linux/delay.h>
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#include <linux/mm.h>
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||
#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <scsi/scsi.h> /* for SCSI_IOCTL_GET_IDLUN */
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#include <scsi/scsi_ioctl.h>
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#include <linux/hdreg.h> /* for HDIO_GETGEO */
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#include <linux/blkpg.h>
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#include <linux/buffer_head.h>
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#include <linux/blkdev.h>
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#include <asm/setup.h>
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#include <asm/pgtable.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <asm/atarihw.h>
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#include <asm/atariints.h>
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#include <asm/atari_acsi.h>
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#include <asm/atari_stdma.h>
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#include <asm/atari_stram.h>
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static void (*do_acsi)(void) = NULL;
|
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static struct request_queue *acsi_queue;
|
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#define QUEUE (acsi_queue)
|
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#define CURRENT elv_next_request(acsi_queue)
|
||
|
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#define DEBUG
|
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#undef DEBUG_DETECT
|
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#undef NO_WRITE
|
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|
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#define MAX_ERRORS 8 /* Max read/write errors/sector */
|
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#define MAX_LUN 8 /* Max LUNs per target */
|
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#define MAX_DEV 16
|
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#define ACSI_BUFFER_SIZE (16*1024) /* "normal" ACSI buffer size */
|
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#define ACSI_BUFFER_MINSIZE (2048) /* min. buf size if ext. DMA */
|
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#define ACSI_BUFFER_SIZE_ORDER 2 /* order size for above */
|
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#define ACSI_BUFFER_MINSIZE_ORDER 0 /* order size for above */
|
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#define ACSI_BUFFER_SECTORS (ACSI_BUFFER_SIZE/512)
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|
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#define ACSI_BUFFER_ORDER \
|
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(ATARIHW_PRESENT(EXTD_DMA) ? \
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ACSI_BUFFER_MINSIZE_ORDER : \
|
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ACSI_BUFFER_SIZE_ORDER)
|
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|
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#define ACSI_TIMEOUT (4*HZ)
|
||
|
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/* minimum delay between two commands */
|
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|
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#define COMMAND_DELAY 500
|
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|
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typedef enum {
|
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NONE, HARDDISK, CDROM
|
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} ACSI_TYPE;
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struct acsi_info_struct {
|
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ACSI_TYPE type; /* type of device */
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unsigned target; /* target number */
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unsigned lun; /* LUN in target controller */
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unsigned removable : 1; /* Flag for removable media */
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unsigned read_only : 1; /* Flag for read only devices */
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unsigned old_atari_disk : 1; /* Is an old Atari disk */
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unsigned changed : 1; /* Medium has been changed */
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unsigned long size; /* #blocks */
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int access_count;
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} acsi_info[MAX_DEV];
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/*
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* SENSE KEYS
|
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*/
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#define NO_SENSE 0x00
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#define RECOVERED_ERROR 0x01
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#define NOT_READY 0x02
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#define MEDIUM_ERROR 0x03
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#define HARDWARE_ERROR 0x04
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#define ILLEGAL_REQUEST 0x05
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#define UNIT_ATTENTION 0x06
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#define DATA_PROTECT 0x07
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#define BLANK_CHECK 0x08
|
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#define COPY_ABORTED 0x0a
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#define ABORTED_COMMAND 0x0b
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#define VOLUME_OVERFLOW 0x0d
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#define MISCOMPARE 0x0e
|
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/*
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* DEVICE TYPES
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*/
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#define TYPE_DISK 0x00
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#define TYPE_TAPE 0x01
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#define TYPE_WORM 0x04
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#define TYPE_ROM 0x05
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#define TYPE_MOD 0x07
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#define TYPE_NO_LUN 0x7f
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/* The data returned by MODE SENSE differ between the old Atari
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* hard disks and SCSI disks connected to ACSI. In the following, both
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* formats are defined and some macros to operate on them potably.
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*/
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typedef struct {
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unsigned long dummy[2];
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unsigned long sector_size;
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unsigned char format_code;
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#define ATARI_SENSE_FORMAT_FIX 1
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#define ATARI_SENSE_FORMAT_CHNG 2
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unsigned char cylinders_h;
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unsigned char cylinders_l;
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unsigned char heads;
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unsigned char reduced_h;
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unsigned char reduced_l;
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unsigned char precomp_h;
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unsigned char precomp_l;
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unsigned char landing_zone;
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unsigned char steprate;
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unsigned char type;
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#define ATARI_SENSE_TYPE_FIXCHNG_MASK 4
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#define ATARI_SENSE_TYPE_SOFTHARD_MASK 8
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#define ATARI_SENSE_TYPE_FIX 4
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#define ATARI_SENSE_TYPE_CHNG 0
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#define ATARI_SENSE_TYPE_SOFT 0
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#define ATARI_SENSE_TYPE_HARD 8
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unsigned char sectors;
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} ATARI_SENSE_DATA;
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#define ATARI_CAPACITY(sd) \
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(((int)((sd).cylinders_h<<8)|(sd).cylinders_l) * \
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(sd).heads * (sd).sectors)
|
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|
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|
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typedef struct {
|
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unsigned char dummy1;
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unsigned char medium_type;
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unsigned char dummy2;
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unsigned char descriptor_size;
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unsigned long block_count;
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unsigned long sector_size;
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/* Page 0 data */
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unsigned char page_code;
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unsigned char page_size;
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unsigned char page_flags;
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unsigned char qualifier;
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} SCSI_SENSE_DATA;
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#define SCSI_CAPACITY(sd) ((sd).block_count & 0xffffff)
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typedef union {
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ATARI_SENSE_DATA atari;
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SCSI_SENSE_DATA scsi;
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} SENSE_DATA;
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#define SENSE_TYPE_UNKNOWN 0
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#define SENSE_TYPE_ATARI 1
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#define SENSE_TYPE_SCSI 2
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#define SENSE_TYPE(sd) \
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(((sd).atari.dummy[0] == 8 && \
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((sd).atari.format_code == 1 || \
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(sd).atari.format_code == 2)) ? SENSE_TYPE_ATARI : \
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((sd).scsi.dummy1 >= 11) ? SENSE_TYPE_SCSI : \
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SENSE_TYPE_UNKNOWN)
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#define CAPACITY(sd) \
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(SENSE_TYPE(sd) == SENSE_TYPE_ATARI ? \
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ATARI_CAPACITY((sd).atari) : \
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SCSI_CAPACITY((sd).scsi))
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#define SECTOR_SIZE(sd) \
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(SENSE_TYPE(sd) == SENSE_TYPE_ATARI ? \
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(sd).atari.sector_size : \
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(sd).scsi.sector_size & 0xffffff)
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/* Default size if capacity cannot be determined (1 GByte) */
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#define DEFAULT_SIZE 0x1fffff
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#define CARTRCH_STAT(aip,buf) \
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(aip->old_atari_disk ? \
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(((buf)[0] & 0x7f) == 0x28) : \
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((((buf)[0] & 0x70) == 0x70) ? \
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(((buf)[2] & 0x0f) == 0x06) : \
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(((buf)[0] & 0x0f) == 0x06))) \
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/* These two are also exported to other drivers that work on the ACSI bus and
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* need an ST-RAM buffer. */
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char *acsi_buffer;
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unsigned long phys_acsi_buffer;
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static int NDevices;
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static int CurrentNReq;
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static int CurrentNSect;
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static char *CurrentBuffer;
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static DEFINE_SPINLOCK(acsi_lock);
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#define SET_TIMER() mod_timer(&acsi_timer, jiffies + ACSI_TIMEOUT)
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#define CLEAR_TIMER() del_timer(&acsi_timer)
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static unsigned long STramMask;
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#define STRAM_ADDR(a) (((a) & STramMask) == 0)
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/* ACSI commands */
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static char tur_cmd[6] = { 0x00, 0, 0, 0, 0, 0 };
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static char modesense_cmd[6] = { 0x1a, 0, 0, 0, 24, 0 };
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static char modeselect_cmd[6] = { 0x15, 0, 0, 0, 12, 0 };
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static char inquiry_cmd[6] = { 0x12, 0, 0, 0,255, 0 };
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static char reqsense_cmd[6] = { 0x03, 0, 0, 0, 4, 0 };
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static char read_cmd[6] = { 0x08, 0, 0, 0, 0, 0 };
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static char write_cmd[6] = { 0x0a, 0, 0, 0, 0, 0 };
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static char pa_med_rem_cmd[6] = { 0x1e, 0, 0, 0, 0, 0 };
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#define CMDSET_TARG_LUN(cmd,targ,lun) \
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do { \
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cmd[0] = (cmd[0] & ~0xe0) | (targ)<<5; \
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cmd[1] = (cmd[1] & ~0xe0) | (lun)<<5; \
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} while(0)
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#define CMDSET_BLOCK(cmd,blk) \
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do { \
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unsigned long __blk = (blk); \
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cmd[3] = __blk; __blk >>= 8; \
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cmd[2] = __blk; __blk >>= 8; \
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cmd[1] = (cmd[1] & 0xe0) | (__blk & 0x1f); \
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} while(0)
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#define CMDSET_LEN(cmd,len) \
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do { \
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cmd[4] = (len); \
|
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} while(0)
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/* ACSI errors (from REQUEST SENSE); There are two tables, one for the
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* old Atari disks and one for SCSI on ACSI disks.
|
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*/
|
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struct acsi_error {
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unsigned char code;
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const char *text;
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} atari_acsi_errors[] = {
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{ 0x00, "No error (??)" },
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{ 0x01, "No index pulses" },
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{ 0x02, "Seek not complete" },
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{ 0x03, "Write fault" },
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{ 0x04, "Drive not ready" },
|
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{ 0x06, "No Track 00 signal" },
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{ 0x10, "ECC error in ID field" },
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{ 0x11, "Uncorrectable data error" },
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{ 0x12, "ID field address mark not found" },
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{ 0x13, "Data field address mark not found" },
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{ 0x14, "Record not found" },
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{ 0x15, "Seek error" },
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{ 0x18, "Data check in no retry mode" },
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{ 0x19, "ECC error during verify" },
|
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{ 0x1a, "Access to bad block" },
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{ 0x1c, "Unformatted or bad format" },
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{ 0x20, "Invalid command" },
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{ 0x21, "Invalid block address" },
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{ 0x23, "Volume overflow" },
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{ 0x24, "Invalid argument" },
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{ 0x25, "Invalid drive number" },
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{ 0x26, "Byte zero parity check" },
|
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{ 0x28, "Cartride changed" },
|
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{ 0x2c, "Error count overflow" },
|
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{ 0x30, "Controller selftest failed" }
|
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},
|
||
|
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scsi_acsi_errors[] = {
|
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{ 0x00, "No error (??)" },
|
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{ 0x01, "Recovered error" },
|
||
{ 0x02, "Drive not ready" },
|
||
{ 0x03, "Uncorrectable medium error" },
|
||
{ 0x04, "Hardware error" },
|
||
{ 0x05, "Illegal request" },
|
||
{ 0x06, "Unit attention (Reset or cartridge changed)" },
|
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{ 0x07, "Data protection" },
|
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{ 0x08, "Blank check" },
|
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{ 0x0b, "Aborted Command" },
|
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{ 0x0d, "Volume overflow" }
|
||
};
|
||
|
||
|
||
|
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/***************************** Prototypes *****************************/
|
||
|
||
static int acsicmd_dma( const char *cmd, char *buffer, int blocks, int
|
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rwflag, int enable);
|
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static int acsi_reqsense( char *buffer, int targ, int lun);
|
||
static void acsi_print_error(const unsigned char *errblk, struct acsi_info_struct *aip);
|
||
static irqreturn_t acsi_interrupt (int irq, void *data);
|
||
static void unexpected_acsi_interrupt( void );
|
||
static void bad_rw_intr( void );
|
||
static void read_intr( void );
|
||
static void write_intr( void);
|
||
static void acsi_times_out( unsigned long dummy );
|
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static void copy_to_acsibuffer( void );
|
||
static void copy_from_acsibuffer( void );
|
||
static void do_end_requests( void );
|
||
static void do_acsi_request( request_queue_t * );
|
||
static void redo_acsi_request( void );
|
||
static int acsi_ioctl( struct inode *inode, struct file *file, unsigned int
|
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cmd, unsigned long arg );
|
||
static int acsi_open( struct inode * inode, struct file * filp );
|
||
static int acsi_release( struct inode * inode, struct file * file );
|
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static void acsi_prevent_removal(struct acsi_info_struct *aip, int flag );
|
||
static int acsi_change_blk_size( int target, int lun);
|
||
static int acsi_mode_sense( int target, int lun, SENSE_DATA *sd );
|
||
static int acsi_revalidate (struct gendisk *disk);
|
||
|
||
/************************* End of Prototypes **************************/
|
||
|
||
|
||
DEFINE_TIMER(acsi_timer, acsi_times_out, 0, 0);
|
||
|
||
|
||
#ifdef CONFIG_ATARI_SLM
|
||
|
||
extern int attach_slm( int target, int lun );
|
||
extern int slm_init( void );
|
||
|
||
#endif
|
||
|
||
|
||
|
||
/***********************************************************************
|
||
*
|
||
* ACSI primitives
|
||
*
|
||
**********************************************************************/
|
||
|
||
|
||
/*
|
||
* The following two functions wait for _IRQ to become Low or High,
|
||
* resp., with a timeout. The 'timeout' parameter is in jiffies
|
||
* (10ms).
|
||
* If the functions are called with timer interrupts on (int level <
|
||
* 6), the timeout is based on the 'jiffies' variable to provide exact
|
||
* timeouts for device probing etc.
|
||
* If interrupts are disabled, the number of tries is based on the
|
||
* 'loops_per_jiffy' variable. A rough estimation is sufficient here...
|
||
*/
|
||
|
||
#define INT_LEVEL \
|
||
({ unsigned __sr; \
|
||
__asm__ __volatile__ ( "movew %/sr,%0" : "=dm" (__sr) ); \
|
||
(__sr >> 8) & 7; \
|
||
})
|
||
|
||
int acsi_wait_for_IRQ( unsigned timeout )
|
||
|
||
{
|
||
if (INT_LEVEL < 6) {
|
||
unsigned long maxjif = jiffies + timeout;
|
||
while (time_before(jiffies, maxjif))
|
||
if (!(mfp.par_dt_reg & 0x20)) return( 1 );
|
||
}
|
||
else {
|
||
long tries = loops_per_jiffy / 8 * timeout;
|
||
while( --tries >= 0 )
|
||
if (!(mfp.par_dt_reg & 0x20)) return( 1 );
|
||
}
|
||
return( 0 ); /* timeout! */
|
||
}
|
||
|
||
|
||
int acsi_wait_for_noIRQ( unsigned timeout )
|
||
|
||
{
|
||
if (INT_LEVEL < 6) {
|
||
unsigned long maxjif = jiffies + timeout;
|
||
while (time_before(jiffies, maxjif))
|
||
if (mfp.par_dt_reg & 0x20) return( 1 );
|
||
}
|
||
else {
|
||
long tries = loops_per_jiffy * timeout / 8;
|
||
while( tries-- >= 0 )
|
||
if (mfp.par_dt_reg & 0x20) return( 1 );
|
||
}
|
||
return( 0 ); /* timeout! */
|
||
}
|
||
|
||
static struct timeval start_time;
|
||
|
||
void
|
||
acsi_delay_start(void)
|
||
{
|
||
do_gettimeofday(&start_time);
|
||
}
|
||
|
||
/* wait from acsi_delay_start to now usec (<1E6) usec */
|
||
|
||
void
|
||
acsi_delay_end(long usec)
|
||
{
|
||
struct timeval end_time;
|
||
long deltau,deltas;
|
||
do_gettimeofday(&end_time);
|
||
deltau=end_time.tv_usec - start_time.tv_usec;
|
||
deltas=end_time.tv_sec - start_time.tv_sec;
|
||
if (deltas > 1 || deltas < 0)
|
||
return;
|
||
if (deltas > 0)
|
||
deltau += 1000*1000;
|
||
if (deltau >= usec)
|
||
return;
|
||
udelay(usec-deltau);
|
||
}
|
||
|
||
/* acsicmd_dma() sends an ACSI command and sets up the DMA to transfer
|
||
* 'blocks' blocks of 512 bytes from/to 'buffer'.
|
||
* Because the _IRQ signal is used for handshaking the command bytes,
|
||
* the ACSI interrupt has to be disabled in this function. If the end
|
||
* of the operation should be signalled by a real interrupt, it has to be
|
||
* reenabled afterwards.
|
||
*/
|
||
|
||
static int acsicmd_dma( const char *cmd, char *buffer, int blocks, int rwflag, int enable)
|
||
|
||
{ unsigned long flags, paddr;
|
||
int i;
|
||
|
||
#ifdef NO_WRITE
|
||
if (rwflag || *cmd == 0x0a) {
|
||
printk( "ACSI: Write commands disabled!\n" );
|
||
return( 0 );
|
||
}
|
||
#endif
|
||
|
||
rwflag = rwflag ? 0x100 : 0;
|
||
paddr = virt_to_phys( buffer );
|
||
|
||
acsi_delay_end(COMMAND_DELAY);
|
||
DISABLE_IRQ();
|
||
|
||
local_irq_save(flags);
|
||
/* Low on A1 */
|
||
dma_wd.dma_mode_status = 0x88 | rwflag;
|
||
MFPDELAY();
|
||
|
||
/* set DMA address */
|
||
dma_wd.dma_lo = (unsigned char)paddr;
|
||
paddr >>= 8;
|
||
MFPDELAY();
|
||
dma_wd.dma_md = (unsigned char)paddr;
|
||
paddr >>= 8;
|
||
MFPDELAY();
|
||
if (ATARIHW_PRESENT(EXTD_DMA))
|
||
st_dma_ext_dmahi = (unsigned short)paddr;
|
||
else
|
||
dma_wd.dma_hi = (unsigned char)paddr;
|
||
MFPDELAY();
|
||
local_irq_restore(flags);
|
||
|
||
/* send the command bytes except the last */
|
||
for( i = 0; i < 5; ++i ) {
|
||
DMA_LONG_WRITE( *cmd++, 0x8a | rwflag );
|
||
udelay(20);
|
||
if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */
|
||
}
|
||
|
||
/* Clear FIFO and switch DMA to correct direction */
|
||
dma_wd.dma_mode_status = 0x92 | (rwflag ^ 0x100);
|
||
MFPDELAY();
|
||
dma_wd.dma_mode_status = 0x92 | rwflag;
|
||
MFPDELAY();
|
||
|
||
/* How many sectors for DMA */
|
||
dma_wd.fdc_acces_seccount = blocks;
|
||
MFPDELAY();
|
||
|
||
/* send last command byte */
|
||
dma_wd.dma_mode_status = 0x8a | rwflag;
|
||
MFPDELAY();
|
||
DMA_LONG_WRITE( *cmd++, 0x0a | rwflag );
|
||
if (enable)
|
||
ENABLE_IRQ();
|
||
udelay(80);
|
||
|
||
return( 1 );
|
||
}
|
||
|
||
|
||
/*
|
||
* acsicmd_nodma() sends an ACSI command that requires no DMA.
|
||
*/
|
||
|
||
int acsicmd_nodma( const char *cmd, int enable)
|
||
|
||
{ int i;
|
||
|
||
acsi_delay_end(COMMAND_DELAY);
|
||
DISABLE_IRQ();
|
||
|
||
/* send first command byte */
|
||
dma_wd.dma_mode_status = 0x88;
|
||
MFPDELAY();
|
||
DMA_LONG_WRITE( *cmd++, 0x8a );
|
||
udelay(20);
|
||
if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */
|
||
|
||
/* send the intermediate command bytes */
|
||
for( i = 0; i < 4; ++i ) {
|
||
DMA_LONG_WRITE( *cmd++, 0x8a );
|
||
udelay(20);
|
||
if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */
|
||
}
|
||
|
||
/* send last command byte */
|
||
DMA_LONG_WRITE( *cmd++, 0x0a );
|
||
if (enable)
|
||
ENABLE_IRQ();
|
||
udelay(80);
|
||
|
||
return( 1 );
|
||
/* Note that the ACSI interrupt is still disabled after this
|
||
* function. If you want to get the IRQ delivered, enable it manually!
|
||
*/
|
||
}
|
||
|
||
|
||
static int acsi_reqsense( char *buffer, int targ, int lun)
|
||
|
||
{
|
||
CMDSET_TARG_LUN( reqsense_cmd, targ, lun);
|
||
if (!acsicmd_dma( reqsense_cmd, buffer, 1, 0, 0 )) return( 0 );
|
||
if (!acsi_wait_for_IRQ( 10 )) return( 0 );
|
||
acsi_getstatus();
|
||
if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 );
|
||
if (!acsi_wait_for_IRQ( 10 )) return( 0 );
|
||
acsi_getstatus();
|
||
if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 );
|
||
if (!acsi_wait_for_IRQ( 10 )) return( 0 );
|
||
acsi_getstatus();
|
||
if (!acsicmd_nodma( reqsense_cmd, 0 )) return( 0 );
|
||
if (!acsi_wait_for_IRQ( 10 )) return( 0 );
|
||
acsi_getstatus();
|
||
dma_cache_maintenance( virt_to_phys(buffer), 16, 0 );
|
||
|
||
return( 1 );
|
||
}
|
||
|
||
|
||
/*
|
||
* ACSI status phase: get the status byte from the bus
|
||
*
|
||
* I've seen several times that a 0xff status is read, propably due to
|
||
* a timing error. In this case, the procedure is repeated after the
|
||
* next _IRQ edge.
|
||
*/
|
||
|
||
int acsi_getstatus( void )
|
||
|
||
{ int status;
|
||
|
||
DISABLE_IRQ();
|
||
for(;;) {
|
||
if (!acsi_wait_for_IRQ( 100 )) {
|
||
acsi_delay_start();
|
||
return( -1 );
|
||
}
|
||
dma_wd.dma_mode_status = 0x8a;
|
||
MFPDELAY();
|
||
status = dma_wd.fdc_acces_seccount;
|
||
if (status != 0xff) break;
|
||
#ifdef DEBUG
|
||
printk("ACSI: skipping 0xff status byte\n" );
|
||
#endif
|
||
udelay(40);
|
||
acsi_wait_for_noIRQ( 20 );
|
||
}
|
||
dma_wd.dma_mode_status = 0x80;
|
||
udelay(40);
|
||
acsi_wait_for_noIRQ( 20 );
|
||
|
||
acsi_delay_start();
|
||
return( status & 0x1f ); /* mask of the device# */
|
||
}
|
||
|
||
|
||
#if (defined(CONFIG_ATARI_SLM) || defined(CONFIG_ATARI_SLM_MODULE))
|
||
|
||
/* Receive data in an extended status phase. Needed by SLM printer. */
|
||
|
||
int acsi_extstatus( char *buffer, int cnt )
|
||
|
||
{ int status;
|
||
|
||
DISABLE_IRQ();
|
||
udelay(80);
|
||
while( cnt-- > 0 ) {
|
||
if (!acsi_wait_for_IRQ( 40 )) return( 0 );
|
||
dma_wd.dma_mode_status = 0x8a;
|
||
MFPDELAY();
|
||
status = dma_wd.fdc_acces_seccount;
|
||
MFPDELAY();
|
||
*buffer++ = status & 0xff;
|
||
udelay(40);
|
||
}
|
||
return( 1 );
|
||
}
|
||
|
||
|
||
/* Finish an extended status phase */
|
||
|
||
void acsi_end_extstatus( void )
|
||
|
||
{
|
||
dma_wd.dma_mode_status = 0x80;
|
||
udelay(40);
|
||
acsi_wait_for_noIRQ( 20 );
|
||
acsi_delay_start();
|
||
}
|
||
|
||
|
||
/* Send data in an extended command phase */
|
||
|
||
int acsi_extcmd( unsigned char *buffer, int cnt )
|
||
|
||
{
|
||
while( cnt-- > 0 ) {
|
||
DMA_LONG_WRITE( *buffer++, 0x8a );
|
||
udelay(20);
|
||
if (!acsi_wait_for_IRQ( HZ/2 )) return( 0 ); /* timeout */
|
||
}
|
||
return( 1 );
|
||
}
|
||
|
||
#endif
|
||
|
||
|
||
static void acsi_print_error(const unsigned char *errblk, struct acsi_info_struct *aip)
|
||
|
||
{ int atari_err, i, errcode;
|
||
struct acsi_error *arr;
|
||
|
||
atari_err = aip->old_atari_disk;
|
||
if (atari_err)
|
||
errcode = errblk[0] & 0x7f;
|
||
else
|
||
if ((errblk[0] & 0x70) == 0x70)
|
||
errcode = errblk[2] & 0x0f;
|
||
else
|
||
errcode = errblk[0] & 0x0f;
|
||
|
||
printk( KERN_ERR "ACSI error 0x%02x", errcode );
|
||
|
||
if (errblk[0] & 0x80)
|
||
printk( " for sector %d",
|
||
((errblk[1] & 0x1f) << 16) |
|
||
(errblk[2] << 8) | errblk[0] );
|
||
|
||
arr = atari_err ? atari_acsi_errors : scsi_acsi_errors;
|
||
i = atari_err ? sizeof(atari_acsi_errors)/sizeof(*atari_acsi_errors) :
|
||
sizeof(scsi_acsi_errors)/sizeof(*scsi_acsi_errors);
|
||
|
||
for( --i; i >= 0; --i )
|
||
if (arr[i].code == errcode) break;
|
||
if (i >= 0)
|
||
printk( ": %s\n", arr[i].text );
|
||
}
|
||
|
||
/*******************************************************************
|
||
*
|
||
* ACSI interrupt routine
|
||
* Test, if this is a ACSI interrupt and call the irq handler
|
||
* Otherwise ignore this interrupt.
|
||
*
|
||
*******************************************************************/
|
||
|
||
static irqreturn_t acsi_interrupt(int irq, void *data )
|
||
|
||
{ void (*acsi_irq_handler)(void) = do_acsi;
|
||
|
||
do_acsi = NULL;
|
||
CLEAR_TIMER();
|
||
|
||
if (!acsi_irq_handler)
|
||
acsi_irq_handler = unexpected_acsi_interrupt;
|
||
acsi_irq_handler();
|
||
return IRQ_HANDLED;
|
||
}
|
||
|
||
|
||
/******************************************************************
|
||
*
|
||
* The Interrupt handlers
|
||
*
|
||
*******************************************************************/
|
||
|
||
|
||
static void unexpected_acsi_interrupt( void )
|
||
|
||
{
|
||
printk( KERN_WARNING "Unexpected ACSI interrupt\n" );
|
||
}
|
||
|
||
|
||
/* This function is called in case of errors. Because we cannot reset
|
||
* the ACSI bus or a single device, there is no other choice than
|
||
* retrying several times :-(
|
||
*/
|
||
|
||
static void bad_rw_intr( void )
|
||
|
||
{
|
||
if (!CURRENT)
|
||
return;
|
||
|
||
if (++CURRENT->errors >= MAX_ERRORS)
|
||
end_request(CURRENT, 0);
|
||
/* Otherwise just retry */
|
||
}
|
||
|
||
|
||
static void read_intr( void )
|
||
|
||
{ int status;
|
||
|
||
status = acsi_getstatus();
|
||
if (status != 0) {
|
||
struct gendisk *disk = CURRENT->rq_disk;
|
||
struct acsi_info_struct *aip = disk->private_data;
|
||
printk(KERN_ERR "%s: ", disk->disk_name);
|
||
if (!acsi_reqsense(acsi_buffer, aip->target, aip->lun))
|
||
printk( "ACSI error and REQUEST SENSE failed (status=0x%02x)\n", status );
|
||
else {
|
||
acsi_print_error(acsi_buffer, aip);
|
||
if (CARTRCH_STAT(aip, acsi_buffer))
|
||
aip->changed = 1;
|
||
}
|
||
ENABLE_IRQ();
|
||
bad_rw_intr();
|
||
redo_acsi_request();
|
||
return;
|
||
}
|
||
|
||
dma_cache_maintenance( virt_to_phys(CurrentBuffer), CurrentNSect*512, 0 );
|
||
if (CurrentBuffer == acsi_buffer)
|
||
copy_from_acsibuffer();
|
||
|
||
do_end_requests();
|
||
redo_acsi_request();
|
||
}
|
||
|
||
|
||
static void write_intr(void)
|
||
|
||
{ int status;
|
||
|
||
status = acsi_getstatus();
|
||
if (status != 0) {
|
||
struct gendisk *disk = CURRENT->rq_disk;
|
||
struct acsi_info_struct *aip = disk->private_data;
|
||
printk( KERN_ERR "%s: ", disk->disk_name);
|
||
if (!acsi_reqsense( acsi_buffer, aip->target, aip->lun))
|
||
printk( "ACSI error and REQUEST SENSE failed (status=0x%02x)\n", status );
|
||
else {
|
||
acsi_print_error(acsi_buffer, aip);
|
||
if (CARTRCH_STAT(aip, acsi_buffer))
|
||
aip->changed = 1;
|
||
}
|
||
bad_rw_intr();
|
||
redo_acsi_request();
|
||
return;
|
||
}
|
||
|
||
do_end_requests();
|
||
redo_acsi_request();
|
||
}
|
||
|
||
|
||
static void acsi_times_out( unsigned long dummy )
|
||
|
||
{
|
||
DISABLE_IRQ();
|
||
if (!do_acsi) return;
|
||
|
||
do_acsi = NULL;
|
||
printk( KERN_ERR "ACSI timeout\n" );
|
||
if (!CURRENT)
|
||
return;
|
||
if (++CURRENT->errors >= MAX_ERRORS) {
|
||
#ifdef DEBUG
|
||
printk( KERN_ERR "ACSI: too many errors.\n" );
|
||
#endif
|
||
end_request(CURRENT, 0);
|
||
}
|
||
|
||
redo_acsi_request();
|
||
}
|
||
|
||
|
||
|
||
/***********************************************************************
|
||
*
|
||
* Scatter-gather utility functions
|
||
*
|
||
***********************************************************************/
|
||
|
||
|
||
static void copy_to_acsibuffer( void )
|
||
|
||
{ int i;
|
||
char *src, *dst;
|
||
struct buffer_head *bh;
|
||
|
||
src = CURRENT->buffer;
|
||
dst = acsi_buffer;
|
||
bh = CURRENT->bh;
|
||
|
||
if (!bh)
|
||
memcpy( dst, src, CurrentNSect*512 );
|
||
else
|
||
for( i = 0; i < CurrentNReq; ++i ) {
|
||
memcpy( dst, src, bh->b_size );
|
||
dst += bh->b_size;
|
||
if ((bh = bh->b_reqnext))
|
||
src = bh->b_data;
|
||
}
|
||
}
|
||
|
||
|
||
static void copy_from_acsibuffer( void )
|
||
|
||
{ int i;
|
||
char *src, *dst;
|
||
struct buffer_head *bh;
|
||
|
||
dst = CURRENT->buffer;
|
||
src = acsi_buffer;
|
||
bh = CURRENT->bh;
|
||
|
||
if (!bh)
|
||
memcpy( dst, src, CurrentNSect*512 );
|
||
else
|
||
for( i = 0; i < CurrentNReq; ++i ) {
|
||
memcpy( dst, src, bh->b_size );
|
||
src += bh->b_size;
|
||
if ((bh = bh->b_reqnext))
|
||
dst = bh->b_data;
|
||
}
|
||
}
|
||
|
||
|
||
static void do_end_requests( void )
|
||
|
||
{ int i, n;
|
||
|
||
if (!CURRENT->bh) {
|
||
CURRENT->nr_sectors -= CurrentNSect;
|
||
CURRENT->current_nr_sectors -= CurrentNSect;
|
||
CURRENT->sector += CurrentNSect;
|
||
if (CURRENT->nr_sectors == 0)
|
||
end_request(CURRENT, 1);
|
||
}
|
||
else {
|
||
for( i = 0; i < CurrentNReq; ++i ) {
|
||
n = CURRENT->bh->b_size >> 9;
|
||
CURRENT->nr_sectors -= n;
|
||
CURRENT->current_nr_sectors -= n;
|
||
CURRENT->sector += n;
|
||
end_request(CURRENT, 1);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
|
||
|
||
/***********************************************************************
|
||
*
|
||
* do_acsi_request and friends
|
||
*
|
||
***********************************************************************/
|
||
|
||
static void do_acsi_request( request_queue_t * q )
|
||
|
||
{
|
||
stdma_lock( acsi_interrupt, NULL );
|
||
redo_acsi_request();
|
||
}
|
||
|
||
|
||
static void redo_acsi_request( void )
|
||
{
|
||
unsigned block, target, lun, nsect;
|
||
char *buffer;
|
||
unsigned long pbuffer;
|
||
struct buffer_head *bh;
|
||
struct gendisk *disk;
|
||
struct acsi_info_struct *aip;
|
||
|
||
repeat:
|
||
CLEAR_TIMER();
|
||
|
||
if (do_acsi)
|
||
return;
|
||
|
||
if (!CURRENT) {
|
||
do_acsi = NULL;
|
||
ENABLE_IRQ();
|
||
stdma_release();
|
||
return;
|
||
}
|
||
|
||
disk = CURRENT->rq_disk;
|
||
aip = disk->private_data;
|
||
if (CURRENT->bh) {
|
||
if (!CURRENT->bh && !buffer_locked(CURRENT->bh))
|
||
panic("ACSI: block not locked");
|
||
}
|
||
|
||
block = CURRENT->sector;
|
||
if (block+CURRENT->nr_sectors >= get_capacity(disk)) {
|
||
#ifdef DEBUG
|
||
printk( "%s: attempted access for blocks %d...%ld past end of device at block %ld.\n",
|
||
disk->disk_name,
|
||
block, block + CURRENT->nr_sectors - 1,
|
||
get_capacity(disk));
|
||
#endif
|
||
end_request(CURRENT, 0);
|
||
goto repeat;
|
||
}
|
||
if (aip->changed) {
|
||
printk( KERN_NOTICE "%s: request denied because cartridge has "
|
||
"been changed.\n", disk->disk_name);
|
||
end_request(CURRENT, 0);
|
||
goto repeat;
|
||
}
|
||
|
||
target = aip->target;
|
||
lun = aip->lun;
|
||
|
||
/* Find out how many sectors should be transferred from/to
|
||
* consecutive buffers and thus can be done with a single command.
|
||
*/
|
||
buffer = CURRENT->buffer;
|
||
pbuffer = virt_to_phys(buffer);
|
||
nsect = CURRENT->current_nr_sectors;
|
||
CurrentNReq = 1;
|
||
|
||
if ((bh = CURRENT->bh) && bh != CURRENT->bhtail) {
|
||
if (!STRAM_ADDR(pbuffer)) {
|
||
/* If transfer is done via the ACSI buffer anyway, we can
|
||
* assemble as much bh's as fit in the buffer.
|
||
*/
|
||
while( (bh = bh->b_reqnext) ) {
|
||
if (nsect + (bh->b_size>>9) > ACSI_BUFFER_SECTORS) break;
|
||
nsect += bh->b_size >> 9;
|
||
++CurrentNReq;
|
||
if (bh == CURRENT->bhtail) break;
|
||
}
|
||
buffer = acsi_buffer;
|
||
pbuffer = phys_acsi_buffer;
|
||
}
|
||
else {
|
||
unsigned long pendadr, pnewadr;
|
||
pendadr = pbuffer + nsect*512;
|
||
while( (bh = bh->b_reqnext) ) {
|
||
pnewadr = virt_to_phys(bh->b_data);
|
||
if (!STRAM_ADDR(pnewadr) || pendadr != pnewadr) break;
|
||
nsect += bh->b_size >> 9;
|
||
pendadr = pnewadr + bh->b_size;
|
||
++CurrentNReq;
|
||
if (bh == CURRENT->bhtail) break;
|
||
}
|
||
}
|
||
}
|
||
else {
|
||
if (!STRAM_ADDR(pbuffer)) {
|
||
buffer = acsi_buffer;
|
||
pbuffer = phys_acsi_buffer;
|
||
if (nsect > ACSI_BUFFER_SECTORS)
|
||
nsect = ACSI_BUFFER_SECTORS;
|
||
}
|
||
}
|
||
CurrentBuffer = buffer;
|
||
CurrentNSect = nsect;
|
||
|
||
if (rq_data_dir(CURRENT) == WRITE) {
|
||
CMDSET_TARG_LUN( write_cmd, target, lun );
|
||
CMDSET_BLOCK( write_cmd, block );
|
||
CMDSET_LEN( write_cmd, nsect );
|
||
if (buffer == acsi_buffer)
|
||
copy_to_acsibuffer();
|
||
dma_cache_maintenance( pbuffer, nsect*512, 1 );
|
||
do_acsi = write_intr;
|
||
if (!acsicmd_dma( write_cmd, buffer, nsect, 1, 1)) {
|
||
do_acsi = NULL;
|
||
printk( KERN_ERR "ACSI (write): Timeout in command block\n" );
|
||
bad_rw_intr();
|
||
goto repeat;
|
||
}
|
||
SET_TIMER();
|
||
return;
|
||
}
|
||
if (rq_data_dir(CURRENT) == READ) {
|
||
CMDSET_TARG_LUN( read_cmd, target, lun );
|
||
CMDSET_BLOCK( read_cmd, block );
|
||
CMDSET_LEN( read_cmd, nsect );
|
||
do_acsi = read_intr;
|
||
if (!acsicmd_dma( read_cmd, buffer, nsect, 0, 1)) {
|
||
do_acsi = NULL;
|
||
printk( KERN_ERR "ACSI (read): Timeout in command block\n" );
|
||
bad_rw_intr();
|
||
goto repeat;
|
||
}
|
||
SET_TIMER();
|
||
return;
|
||
}
|
||
panic("unknown ACSI command");
|
||
}
|
||
|
||
|
||
|
||
/***********************************************************************
|
||
*
|
||
* Misc functions: ioctl, open, release, check_change, ...
|
||
*
|
||
***********************************************************************/
|
||
|
||
static int acsi_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
||
{
|
||
struct acsi_info_struct *aip = bdev->bd_disk->private_data;
|
||
|
||
/*
|
||
* Just fake some geometry here, it's nonsense anyway
|
||
* To make it easy, use Adaptec's usual 64/32 mapping
|
||
*/
|
||
geo->heads = 64;
|
||
geo->sectors = 32;
|
||
geo->cylinders = aip->size >> 11;
|
||
return 0;
|
||
}
|
||
|
||
static int acsi_ioctl( struct inode *inode, struct file *file,
|
||
unsigned int cmd, unsigned long arg )
|
||
{
|
||
struct gendisk *disk = inode->i_bdev->bd_disk;
|
||
struct acsi_info_struct *aip = disk->private_data;
|
||
switch (cmd) {
|
||
case SCSI_IOCTL_GET_IDLUN:
|
||
/* SCSI compatible GET_IDLUN call to get target's ID and LUN number */
|
||
put_user( aip->target | (aip->lun << 8),
|
||
&((Scsi_Idlun *) arg)->dev_id );
|
||
put_user( 0, &((Scsi_Idlun *) arg)->host_unique_id );
|
||
return 0;
|
||
default:
|
||
return -EINVAL;
|
||
}
|
||
}
|
||
|
||
|
||
/*
|
||
* Open a device, check for read-only and lock the medium if it is
|
||
* removable.
|
||
*
|
||
* Changes by Martin Rogge, 9th Aug 1995:
|
||
* Check whether check_disk_change (and therefore revalidate_acsidisk)
|
||
* was successful. They fail when there is no medium in the drive.
|
||
*
|
||
* The problem of media being changed during an operation can be
|
||
* ignored because of the prevent_removal code.
|
||
*
|
||
* Added check for the validity of the device number.
|
||
*
|
||
*/
|
||
|
||
static int acsi_open( struct inode * inode, struct file * filp )
|
||
{
|
||
struct gendisk *disk = inode->i_bdev->bd_disk;
|
||
struct acsi_info_struct *aip = disk->private_data;
|
||
|
||
if (aip->access_count == 0 && aip->removable) {
|
||
#if 0
|
||
aip->changed = 1; /* safety first */
|
||
#endif
|
||
check_disk_change( inode->i_bdev );
|
||
if (aip->changed) /* revalidate was not successful (no medium) */
|
||
return -ENXIO;
|
||
acsi_prevent_removal(aip, 1);
|
||
}
|
||
aip->access_count++;
|
||
|
||
if (filp && filp->f_mode) {
|
||
check_disk_change( inode->i_bdev );
|
||
if (filp->f_mode & 2) {
|
||
if (aip->read_only) {
|
||
acsi_release( inode, filp );
|
||
return -EROFS;
|
||
}
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* Releasing a block device means we sync() it, so that it can safely
|
||
* be forgotten about...
|
||
*/
|
||
|
||
static int acsi_release( struct inode * inode, struct file * file )
|
||
{
|
||
struct gendisk *disk = inode->i_bdev->bd_disk;
|
||
struct acsi_info_struct *aip = disk->private_data;
|
||
if (--aip->access_count == 0 && aip->removable)
|
||
acsi_prevent_removal(aip, 0);
|
||
return( 0 );
|
||
}
|
||
|
||
/*
|
||
* Prevent or allow a media change for removable devices.
|
||
*/
|
||
|
||
static void acsi_prevent_removal(struct acsi_info_struct *aip, int flag)
|
||
{
|
||
stdma_lock( NULL, NULL );
|
||
|
||
CMDSET_TARG_LUN(pa_med_rem_cmd, aip->target, aip->lun);
|
||
CMDSET_LEN( pa_med_rem_cmd, flag );
|
||
|
||
if (acsicmd_nodma(pa_med_rem_cmd, 0) && acsi_wait_for_IRQ(3*HZ))
|
||
acsi_getstatus();
|
||
/* Do not report errors -- some devices may not know this command. */
|
||
|
||
ENABLE_IRQ();
|
||
stdma_release();
|
||
}
|
||
|
||
static int acsi_media_change(struct gendisk *disk)
|
||
{
|
||
struct acsi_info_struct *aip = disk->private_data;
|
||
|
||
if (!aip->removable)
|
||
return 0;
|
||
|
||
if (aip->changed)
|
||
/* We can be sure that the medium has been changed -- REQUEST
|
||
* SENSE has reported this earlier.
|
||
*/
|
||
return 1;
|
||
|
||
/* If the flag isn't set, make a test by reading block 0.
|
||
* If errors happen, it seems to be better to say "changed"...
|
||
*/
|
||
stdma_lock( NULL, NULL );
|
||
CMDSET_TARG_LUN(read_cmd, aip->target, aip->lun);
|
||
CMDSET_BLOCK( read_cmd, 0 );
|
||
CMDSET_LEN( read_cmd, 1 );
|
||
if (acsicmd_dma(read_cmd, acsi_buffer, 1, 0, 0) &&
|
||
acsi_wait_for_IRQ(3*HZ)) {
|
||
if (acsi_getstatus()) {
|
||
if (acsi_reqsense(acsi_buffer, aip->target, aip->lun)) {
|
||
if (CARTRCH_STAT(aip, acsi_buffer))
|
||
aip->changed = 1;
|
||
}
|
||
else {
|
||
printk( KERN_ERR "%s: REQUEST SENSE failed in test for "
|
||
"medium change; assuming a change\n", disk->disk_name );
|
||
aip->changed = 1;
|
||
}
|
||
}
|
||
}
|
||
else {
|
||
printk( KERN_ERR "%s: Test for medium changed timed out; "
|
||
"assuming a change\n", disk->disk_name);
|
||
aip->changed = 1;
|
||
}
|
||
ENABLE_IRQ();
|
||
stdma_release();
|
||
|
||
/* Now, after reading a block, the changed status is surely valid. */
|
||
return aip->changed;
|
||
}
|
||
|
||
|
||
static int acsi_change_blk_size( int target, int lun)
|
||
|
||
{ int i;
|
||
|
||
for (i=0; i<12; i++)
|
||
acsi_buffer[i] = 0;
|
||
|
||
acsi_buffer[3] = 8;
|
||
acsi_buffer[10] = 2;
|
||
CMDSET_TARG_LUN( modeselect_cmd, target, lun);
|
||
|
||
if (!acsicmd_dma( modeselect_cmd, acsi_buffer, 1,1,0) ||
|
||
!acsi_wait_for_IRQ( 3*HZ ) ||
|
||
acsi_getstatus() != 0 ) {
|
||
return(0);
|
||
}
|
||
return(1);
|
||
}
|
||
|
||
|
||
static int acsi_mode_sense( int target, int lun, SENSE_DATA *sd )
|
||
|
||
{
|
||
int page;
|
||
|
||
CMDSET_TARG_LUN( modesense_cmd, target, lun );
|
||
for (page=0; page<4; page++) {
|
||
modesense_cmd[2] = page;
|
||
if (!acsicmd_dma( modesense_cmd, acsi_buffer, 1, 0, 0 ) ||
|
||
!acsi_wait_for_IRQ( 3*HZ ) ||
|
||
acsi_getstatus())
|
||
continue;
|
||
|
||
/* read twice to jump over the second 16-byte border! */
|
||
udelay(300);
|
||
if (acsi_wait_for_noIRQ( 20 ) &&
|
||
acsicmd_nodma( modesense_cmd, 0 ) &&
|
||
acsi_wait_for_IRQ( 3*HZ ) &&
|
||
acsi_getstatus() == 0)
|
||
break;
|
||
}
|
||
if (page == 4) {
|
||
return(0);
|
||
}
|
||
|
||
dma_cache_maintenance( phys_acsi_buffer, sizeof(SENSE_DATA), 0 );
|
||
*sd = *(SENSE_DATA *)acsi_buffer;
|
||
|
||
/* Validity check, depending on type of data */
|
||
|
||
switch( SENSE_TYPE(*sd) ) {
|
||
|
||
case SENSE_TYPE_ATARI:
|
||
if (CAPACITY(*sd) == 0)
|
||
goto invalid_sense;
|
||
break;
|
||
|
||
case SENSE_TYPE_SCSI:
|
||
if (sd->scsi.descriptor_size != 8)
|
||
goto invalid_sense;
|
||
break;
|
||
|
||
case SENSE_TYPE_UNKNOWN:
|
||
|
||
printk( KERN_ERR "ACSI target %d, lun %d: Cannot interpret "
|
||
"sense data\n", target, lun );
|
||
|
||
invalid_sense:
|
||
|
||
#ifdef DEBUG
|
||
{ int i;
|
||
printk( "Mode sense data for ACSI target %d, lun %d seem not valid:",
|
||
target, lun );
|
||
for( i = 0; i < sizeof(SENSE_DATA); ++i )
|
||
printk( "%02x ", (unsigned char)acsi_buffer[i] );
|
||
printk( "\n" );
|
||
}
|
||
#endif
|
||
return( 0 );
|
||
}
|
||
|
||
return( 1 );
|
||
}
|
||
|
||
|
||
|
||
/*******************************************************************
|
||
*
|
||
* Initialization
|
||
*
|
||
********************************************************************/
|
||
|
||
|
||
extern struct block_device_operations acsi_fops;
|
||
|
||
static struct gendisk *acsi_gendisk[MAX_DEV];
|
||
|
||
#define MAX_SCSI_DEVICE_CODE 10
|
||
|
||
static const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE] =
|
||
{
|
||
"Direct-Access ",
|
||
"Sequential-Access",
|
||
"Printer ",
|
||
"Processor ",
|
||
"WORM ",
|
||
"CD-ROM ",
|
||
"Scanner ",
|
||
"Optical Device ",
|
||
"Medium Changer ",
|
||
"Communications "
|
||
};
|
||
|
||
static void print_inquiry(unsigned char *data)
|
||
{
|
||
int i;
|
||
|
||
printk(KERN_INFO " Vendor: ");
|
||
for (i = 8; i < 16; i++)
|
||
{
|
||
if (data[i] >= 0x20 && i < data[4] + 5)
|
||
printk("%c", data[i]);
|
||
else
|
||
printk(" ");
|
||
}
|
||
|
||
printk(" Model: ");
|
||
for (i = 16; i < 32; i++)
|
||
{
|
||
if (data[i] >= 0x20 && i < data[4] + 5)
|
||
printk("%c", data[i]);
|
||
else
|
||
printk(" ");
|
||
}
|
||
|
||
printk(" Rev: ");
|
||
for (i = 32; i < 36; i++)
|
||
{
|
||
if (data[i] >= 0x20 && i < data[4] + 5)
|
||
printk("%c", data[i]);
|
||
else
|
||
printk(" ");
|
||
}
|
||
|
||
printk("\n");
|
||
|
||
i = data[0] & 0x1f;
|
||
|
||
printk(KERN_INFO " Type: %s ", (i < MAX_SCSI_DEVICE_CODE
|
||
? scsi_device_types[i]
|
||
: "Unknown "));
|
||
printk(" ANSI SCSI revision: %02x", data[2] & 0x07);
|
||
if ((data[2] & 0x07) == 1 && (data[3] & 0x0f) == 1)
|
||
printk(" CCS\n");
|
||
else
|
||
printk("\n");
|
||
}
|
||
|
||
|
||
/*
|
||
* Changes by Martin Rogge, 9th Aug 1995:
|
||
* acsi_devinit has been taken out of acsi_geninit, because it needs
|
||
* to be called from revalidate_acsidisk. The result of request sense
|
||
* is now checked for DRIVE NOT READY.
|
||
*
|
||
* The structure *aip is only valid when acsi_devinit returns
|
||
* DEV_SUPPORTED.
|
||
*
|
||
*/
|
||
|
||
#define DEV_NONE 0
|
||
#define DEV_UNKNOWN 1
|
||
#define DEV_SUPPORTED 2
|
||
#define DEV_SLM 3
|
||
|
||
static int acsi_devinit(struct acsi_info_struct *aip)
|
||
{
|
||
int status, got_inquiry;
|
||
SENSE_DATA sense;
|
||
unsigned char reqsense, extsense;
|
||
|
||
/*****************************************************************/
|
||
/* Do a TEST UNIT READY command to test the presence of a device */
|
||
/*****************************************************************/
|
||
|
||
CMDSET_TARG_LUN(tur_cmd, aip->target, aip->lun);
|
||
if (!acsicmd_nodma(tur_cmd, 0)) {
|
||
/* timed out -> no device here */
|
||
#ifdef DEBUG_DETECT
|
||
printk("target %d lun %d: timeout\n", aip->target, aip->lun);
|
||
#endif
|
||
return DEV_NONE;
|
||
}
|
||
|
||
/*************************/
|
||
/* Read the ACSI status. */
|
||
/*************************/
|
||
|
||
status = acsi_getstatus();
|
||
if (status) {
|
||
if (status == 0x12) {
|
||
/* The SLM printer should be the only device that
|
||
* responds with the error code in the status byte. In
|
||
* correct status bytes, bit 4 is never set.
|
||
*/
|
||
printk( KERN_INFO "Detected SLM printer at id %d lun %d\n",
|
||
aip->target, aip->lun);
|
||
return DEV_SLM;
|
||
}
|
||
/* ignore CHECK CONDITION, since some devices send a
|
||
UNIT ATTENTION */
|
||
if ((status & 0x1e) != 0x2) {
|
||
#ifdef DEBUG_DETECT
|
||
printk("target %d lun %d: status %d\n",
|
||
aip->target, aip->lun, status);
|
||
#endif
|
||
return DEV_UNKNOWN;
|
||
}
|
||
}
|
||
|
||
/*******************************/
|
||
/* Do a REQUEST SENSE command. */
|
||
/*******************************/
|
||
|
||
if (!acsi_reqsense(acsi_buffer, aip->target, aip->lun)) {
|
||
printk( KERN_WARNING "acsi_reqsense failed\n");
|
||
acsi_buffer[0] = 0;
|
||
acsi_buffer[2] = UNIT_ATTENTION;
|
||
}
|
||
reqsense = acsi_buffer[0];
|
||
extsense = acsi_buffer[2] & 0xf;
|
||
if (status) {
|
||
if ((reqsense & 0x70) == 0x70) { /* extended sense */
|
||
if (extsense != UNIT_ATTENTION &&
|
||
extsense != NOT_READY) {
|
||
#ifdef DEBUG_DETECT
|
||
printk("target %d lun %d: extended sense %d\n",
|
||
aip->target, aip->lun, extsense);
|
||
#endif
|
||
return DEV_UNKNOWN;
|
||
}
|
||
}
|
||
else {
|
||
if (reqsense & 0x7f) {
|
||
#ifdef DEBUG_DETECT
|
||
printk("target %d lun %d: sense %d\n",
|
||
aip->target, aip->lun, reqsense);
|
||
#endif
|
||
return DEV_UNKNOWN;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
if (reqsense == 0x4) { /* SH204 Bug workaround */
|
||
#ifdef DEBUG_DETECT
|
||
printk("target %d lun %d status=0 sense=4\n",
|
||
aip->target, aip->lun);
|
||
#endif
|
||
return DEV_UNKNOWN;
|
||
}
|
||
|
||
/***********************************************************/
|
||
/* Do an INQUIRY command to get more infos on this device. */
|
||
/***********************************************************/
|
||
|
||
/* Assume default values */
|
||
aip->removable = 1;
|
||
aip->read_only = 0;
|
||
aip->old_atari_disk = 0;
|
||
aip->changed = (extsense == NOT_READY); /* medium inserted? */
|
||
aip->size = DEFAULT_SIZE;
|
||
got_inquiry = 0;
|
||
/* Fake inquiry result for old atari disks */
|
||
memcpy(acsi_buffer, "\000\000\001\000 Adaptec 40xx"
|
||
" ", 40);
|
||
CMDSET_TARG_LUN(inquiry_cmd, aip->target, aip->lun);
|
||
if (acsicmd_dma(inquiry_cmd, acsi_buffer, 1, 0, 0) &&
|
||
acsi_getstatus() == 0) {
|
||
acsicmd_nodma(inquiry_cmd, 0);
|
||
acsi_getstatus();
|
||
dma_cache_maintenance( phys_acsi_buffer, 256, 0 );
|
||
got_inquiry = 1;
|
||
aip->removable = !!(acsi_buffer[1] & 0x80);
|
||
}
|
||
if (aip->type == NONE) /* only at boot time */
|
||
print_inquiry(acsi_buffer);
|
||
switch(acsi_buffer[0]) {
|
||
case TYPE_DISK:
|
||
aip->type = HARDDISK;
|
||
break;
|
||
case TYPE_ROM:
|
||
aip->type = CDROM;
|
||
aip->read_only = 1;
|
||
break;
|
||
default:
|
||
return DEV_UNKNOWN;
|
||
}
|
||
/****************************/
|
||
/* Do a MODE SENSE command. */
|
||
/****************************/
|
||
|
||
if (!acsi_mode_sense(aip->target, aip->lun, &sense)) {
|
||
printk( KERN_WARNING "No mode sense data.\n" );
|
||
return DEV_UNKNOWN;
|
||
}
|
||
if ((SECTOR_SIZE(sense) != 512) &&
|
||
((aip->type != CDROM) ||
|
||
!acsi_change_blk_size(aip->target, aip->lun) ||
|
||
!acsi_mode_sense(aip->target, aip->lun, &sense) ||
|
||
(SECTOR_SIZE(sense) != 512))) {
|
||
printk( KERN_WARNING "Sector size != 512 not supported.\n" );
|
||
return DEV_UNKNOWN;
|
||
}
|
||
/* There are disks out there that claim to have 0 sectors... */
|
||
if (CAPACITY(sense))
|
||
aip->size = CAPACITY(sense); /* else keep DEFAULT_SIZE */
|
||
if (!got_inquiry && SENSE_TYPE(sense) == SENSE_TYPE_ATARI) {
|
||
/* If INQUIRY failed and the sense data suggest an old
|
||
* Atari disk (SH20x, Megafile), the disk is not removable
|
||
*/
|
||
aip->removable = 0;
|
||
aip->old_atari_disk = 1;
|
||
}
|
||
|
||
/******************/
|
||
/* We've done it. */
|
||
/******************/
|
||
|
||
return DEV_SUPPORTED;
|
||
}
|
||
|
||
EXPORT_SYMBOL(acsi_delay_start);
|
||
EXPORT_SYMBOL(acsi_delay_end);
|
||
EXPORT_SYMBOL(acsi_wait_for_IRQ);
|
||
EXPORT_SYMBOL(acsi_wait_for_noIRQ);
|
||
EXPORT_SYMBOL(acsicmd_nodma);
|
||
EXPORT_SYMBOL(acsi_getstatus);
|
||
EXPORT_SYMBOL(acsi_buffer);
|
||
EXPORT_SYMBOL(phys_acsi_buffer);
|
||
|
||
#ifdef CONFIG_ATARI_SLM_MODULE
|
||
void acsi_attach_SLMs( int (*attach_func)( int, int ) );
|
||
|
||
EXPORT_SYMBOL(acsi_extstatus);
|
||
EXPORT_SYMBOL(acsi_end_extstatus);
|
||
EXPORT_SYMBOL(acsi_extcmd);
|
||
EXPORT_SYMBOL(acsi_attach_SLMs);
|
||
|
||
/* to remember IDs of SLM devices, SLM module is loaded later
|
||
* (index is target#, contents is lun#, -1 means "no SLM") */
|
||
int SLM_devices[8];
|
||
#endif
|
||
|
||
static struct block_device_operations acsi_fops = {
|
||
.owner = THIS_MODULE,
|
||
.open = acsi_open,
|
||
.release = acsi_release,
|
||
.ioctl = acsi_ioctl,
|
||
.getgeo = acsi_getgeo,
|
||
.media_changed = acsi_media_change,
|
||
.revalidate_disk= acsi_revalidate,
|
||
};
|
||
|
||
#ifdef CONFIG_ATARI_SLM_MODULE
|
||
/* call attach_slm() for each device that is a printer; needed for init of SLM
|
||
* driver as a module, since it's not yet present if acsi.c is inited and thus
|
||
* the bus gets scanned. */
|
||
void acsi_attach_SLMs( int (*attach_func)( int, int ) )
|
||
{
|
||
int i, n = 0;
|
||
|
||
for( i = 0; i < 8; ++i )
|
||
if (SLM_devices[i] >= 0)
|
||
n += (*attach_func)( i, SLM_devices[i] );
|
||
printk( KERN_INFO "Found %d SLM printer(s) total.\n", n );
|
||
}
|
||
#endif /* CONFIG_ATARI_SLM_MODULE */
|
||
|
||
|
||
int acsi_init( void )
|
||
{
|
||
int err = 0;
|
||
int i, target, lun;
|
||
struct acsi_info_struct *aip;
|
||
#ifdef CONFIG_ATARI_SLM
|
||
int n_slm = 0;
|
||
#endif
|
||
if (!MACH_IS_ATARI || !ATARIHW_PRESENT(ACSI))
|
||
return 0;
|
||
if (register_blkdev(ACSI_MAJOR, "ad")) {
|
||
err = -EBUSY;
|
||
goto out1;
|
||
}
|
||
if (!(acsi_buffer =
|
||
(char *)atari_stram_alloc(ACSI_BUFFER_SIZE, "acsi"))) {
|
||
err = -ENOMEM;
|
||
printk( KERN_ERR "Unable to get ACSI ST-Ram buffer.\n" );
|
||
goto out2;
|
||
}
|
||
phys_acsi_buffer = virt_to_phys( acsi_buffer );
|
||
STramMask = ATARIHW_PRESENT(EXTD_DMA) ? 0x00000000 : 0xff000000;
|
||
|
||
acsi_queue = blk_init_queue(do_acsi_request, &acsi_lock);
|
||
if (!acsi_queue) {
|
||
err = -ENOMEM;
|
||
goto out2a;
|
||
}
|
||
#ifdef CONFIG_ATARI_SLM
|
||
err = slm_init();
|
||
#endif
|
||
if (err)
|
||
goto out3;
|
||
|
||
printk( KERN_INFO "Probing ACSI devices:\n" );
|
||
NDevices = 0;
|
||
#ifdef CONFIG_ATARI_SLM_MODULE
|
||
for( i = 0; i < 8; ++i )
|
||
SLM_devices[i] = -1;
|
||
#endif
|
||
stdma_lock(NULL, NULL);
|
||
|
||
for (target = 0; target < 8 && NDevices < MAX_DEV; ++target) {
|
||
lun = 0;
|
||
do {
|
||
aip = &acsi_info[NDevices];
|
||
aip->type = NONE;
|
||
aip->target = target;
|
||
aip->lun = lun;
|
||
i = acsi_devinit(aip);
|
||
switch (i) {
|
||
case DEV_SUPPORTED:
|
||
printk( KERN_INFO "Detected ");
|
||
switch (aip->type) {
|
||
case HARDDISK:
|
||
printk("disk");
|
||
break;
|
||
case CDROM:
|
||
printk("cdrom");
|
||
break;
|
||
default:
|
||
}
|
||
printk(" ad%c at id %d lun %d ",
|
||
'a' + NDevices, target, lun);
|
||
if (aip->removable)
|
||
printk("(removable) ");
|
||
if (aip->read_only)
|
||
printk("(read-only) ");
|
||
if (aip->size == DEFAULT_SIZE)
|
||
printk(" unkown size, using default ");
|
||
printk("%ld MByte\n",
|
||
(aip->size*512+1024*1024/2)/(1024*1024));
|
||
NDevices++;
|
||
break;
|
||
case DEV_SLM:
|
||
#ifdef CONFIG_ATARI_SLM
|
||
n_slm += attach_slm( target, lun );
|
||
break;
|
||
#endif
|
||
#ifdef CONFIG_ATARI_SLM_MODULE
|
||
SLM_devices[target] = lun;
|
||
break;
|
||
#endif
|
||
/* neither of the above: fall through to unknown device */
|
||
case DEV_UNKNOWN:
|
||
printk( KERN_INFO "Detected unsupported device at "
|
||
"id %d lun %d\n", target, lun);
|
||
break;
|
||
}
|
||
}
|
||
#ifdef CONFIG_ACSI_MULTI_LUN
|
||
while (i != DEV_NONE && ++lun < MAX_LUN);
|
||
#else
|
||
while (0);
|
||
#endif
|
||
}
|
||
|
||
/* reenable interrupt */
|
||
ENABLE_IRQ();
|
||
stdma_release();
|
||
|
||
#ifndef CONFIG_ATARI_SLM
|
||
printk( KERN_INFO "Found %d ACSI device(s) total.\n", NDevices );
|
||
#else
|
||
printk( KERN_INFO "Found %d ACSI device(s) and %d SLM printer(s) total.\n",
|
||
NDevices, n_slm );
|
||
#endif
|
||
err = -ENOMEM;
|
||
for( i = 0; i < NDevices; ++i ) {
|
||
acsi_gendisk[i] = alloc_disk(16);
|
||
if (!acsi_gendisk[i])
|
||
goto out4;
|
||
}
|
||
|
||
for( i = 0; i < NDevices; ++i ) {
|
||
struct gendisk *disk = acsi_gendisk[i];
|
||
sprintf(disk->disk_name, "ad%c", 'a'+i);
|
||
aip = &acsi_info[NDevices];
|
||
disk->major = ACSI_MAJOR;
|
||
disk->first_minor = i << 4;
|
||
if (acsi_info[i].type != HARDDISK)
|
||
disk->minors = 1;
|
||
disk->fops = &acsi_fops;
|
||
disk->private_data = &acsi_info[i];
|
||
set_capacity(disk, acsi_info[i].size);
|
||
disk->queue = acsi_queue;
|
||
add_disk(disk);
|
||
}
|
||
return 0;
|
||
out4:
|
||
while (i--)
|
||
put_disk(acsi_gendisk[i]);
|
||
out3:
|
||
blk_cleanup_queue(acsi_queue);
|
||
out2a:
|
||
atari_stram_free( acsi_buffer );
|
||
out2:
|
||
unregister_blkdev( ACSI_MAJOR, "ad" );
|
||
out1:
|
||
return err;
|
||
}
|
||
|
||
|
||
#ifdef MODULE
|
||
|
||
MODULE_LICENSE("GPL");
|
||
|
||
int init_module(void)
|
||
{
|
||
int err;
|
||
|
||
if ((err = acsi_init()))
|
||
return( err );
|
||
printk( KERN_INFO "ACSI driver loaded as module.\n");
|
||
return( 0 );
|
||
}
|
||
|
||
void cleanup_module(void)
|
||
{
|
||
int i;
|
||
del_timer( &acsi_timer );
|
||
blk_cleanup_queue(acsi_queue);
|
||
atari_stram_free( acsi_buffer );
|
||
|
||
if (unregister_blkdev( ACSI_MAJOR, "ad" ) != 0)
|
||
printk( KERN_ERR "acsi: cleanup_module failed\n");
|
||
|
||
for (i = 0; i < NDevices; i++) {
|
||
del_gendisk(acsi_gendisk[i]);
|
||
put_disk(acsi_gendisk[i]);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* This routine is called to flush all partitions and partition tables
|
||
* for a changed scsi disk, and then re-read the new partition table.
|
||
* If we are revalidating a disk because of a media change, then we
|
||
* enter with usage == 0. If we are using an ioctl, we automatically have
|
||
* usage == 1 (we need an open channel to use an ioctl :-), so this
|
||
* is our limit.
|
||
*
|
||
* Changes by Martin Rogge, 9th Aug 1995:
|
||
* got cd-roms to work by calling acsi_devinit. There are only two problems:
|
||
* First, if there is no medium inserted, the status will remain "changed".
|
||
* That is no problem at all, but our design of three-valued logic (medium
|
||
* changed, medium not changed, no medium inserted).
|
||
* Secondly the check could fail completely and the drive could deliver
|
||
* nonsensical data, which could mess up the acsi_info[] structure. In
|
||
* that case we try to make the entry safe.
|
||
*
|
||
*/
|
||
|
||
static int acsi_revalidate(struct gendisk *disk)
|
||
{
|
||
struct acsi_info_struct *aip = disk->private_data;
|
||
stdma_lock( NULL, NULL );
|
||
if (acsi_devinit(aip) != DEV_SUPPORTED) {
|
||
printk( KERN_ERR "ACSI: revalidate failed for target %d lun %d\n",
|
||
aip->target, aip->lun);
|
||
aip->size = 0;
|
||
aip->read_only = 1;
|
||
aip->removable = 1;
|
||
aip->changed = 1; /* next acsi_open will try again... */
|
||
}
|
||
|
||
ENABLE_IRQ();
|
||
stdma_release();
|
||
set_capacity(disk, aip->size);
|
||
return 0;
|
||
}
|