forked from Minki/linux
c2df40dfb8
The req operation REQ_OP is separated from the rq_flag_bits definition. This converts the block layer drivers to use req_op to get the op from the request struct. Signed-off-by: Mike Christie <mchristi@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
543 lines
14 KiB
C
543 lines
14 KiB
C
/*
|
|
* IDE ATAPI floppy driver.
|
|
*
|
|
* Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
|
|
* Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net>
|
|
* Copyright (C) 2005 Bartlomiej Zolnierkiewicz
|
|
*
|
|
* This driver supports the following IDE floppy drives:
|
|
*
|
|
* LS-120/240 SuperDisk
|
|
* Iomega Zip 100/250
|
|
* Iomega PC Card Clik!/PocketZip
|
|
*
|
|
* For a historical changelog see
|
|
* Documentation/ide/ChangeLog.ide-floppy.1996-2002
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/major.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/genhd.h>
|
|
#include <linux/cdrom.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/hdreg.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/scatterlist.h>
|
|
|
|
#include <scsi/scsi_ioctl.h>
|
|
|
|
#include <asm/byteorder.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/io.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#include "ide-floppy.h"
|
|
|
|
/*
|
|
* After each failed packet command we issue a request sense command and retry
|
|
* the packet command IDEFLOPPY_MAX_PC_RETRIES times.
|
|
*/
|
|
#define IDEFLOPPY_MAX_PC_RETRIES 3
|
|
|
|
/* format capacities descriptor codes */
|
|
#define CAPACITY_INVALID 0x00
|
|
#define CAPACITY_UNFORMATTED 0x01
|
|
#define CAPACITY_CURRENT 0x02
|
|
#define CAPACITY_NO_CARTRIDGE 0x03
|
|
|
|
/*
|
|
* The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
|
|
* was apparently being deasserted before the unit was ready to receive data.
|
|
*/
|
|
#define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
|
|
|
|
static int ide_floppy_callback(ide_drive_t *drive, int dsc)
|
|
{
|
|
struct ide_disk_obj *floppy = drive->driver_data;
|
|
struct ide_atapi_pc *pc = drive->pc;
|
|
struct request *rq = pc->rq;
|
|
int uptodate = pc->error ? 0 : 1;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
if (drive->failed_pc == pc)
|
|
drive->failed_pc = NULL;
|
|
|
|
if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
|
|
rq->cmd_type == REQ_TYPE_BLOCK_PC)
|
|
uptodate = 1; /* FIXME */
|
|
else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
|
|
|
|
u8 *buf = bio_data(rq->bio);
|
|
|
|
if (!pc->error) {
|
|
floppy->sense_key = buf[2] & 0x0F;
|
|
floppy->asc = buf[12];
|
|
floppy->ascq = buf[13];
|
|
floppy->progress_indication = buf[15] & 0x80 ?
|
|
(u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
|
|
|
|
if (drive->failed_pc)
|
|
ide_debug_log(IDE_DBG_PC, "pc = %x",
|
|
drive->failed_pc->c[0]);
|
|
|
|
ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
|
|
"ascq = %x", floppy->sense_key,
|
|
floppy->asc, floppy->ascq);
|
|
} else
|
|
printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
|
|
"Aborting request!\n");
|
|
}
|
|
|
|
if (rq->cmd_type == REQ_TYPE_DRV_PRIV)
|
|
rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
|
|
|
|
return uptodate;
|
|
}
|
|
|
|
static void ide_floppy_report_error(struct ide_disk_obj *floppy,
|
|
struct ide_atapi_pc *pc)
|
|
{
|
|
/* suppress error messages resulting from Medium not present */
|
|
if (floppy->sense_key == 0x02 &&
|
|
floppy->asc == 0x3a &&
|
|
floppy->ascq == 0x00)
|
|
return;
|
|
|
|
printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, "
|
|
"asc = %2x, ascq = %2x\n",
|
|
floppy->drive->name, pc->c[0], floppy->sense_key,
|
|
floppy->asc, floppy->ascq);
|
|
|
|
}
|
|
|
|
static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
|
|
struct ide_cmd *cmd,
|
|
struct ide_atapi_pc *pc)
|
|
{
|
|
struct ide_disk_obj *floppy = drive->driver_data;
|
|
|
|
if (drive->failed_pc == NULL &&
|
|
pc->c[0] != GPCMD_REQUEST_SENSE)
|
|
drive->failed_pc = pc;
|
|
|
|
/* Set the current packet command */
|
|
drive->pc = pc;
|
|
|
|
if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
|
|
unsigned int done = blk_rq_bytes(drive->hwif->rq);
|
|
|
|
if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
|
|
ide_floppy_report_error(floppy, pc);
|
|
|
|
/* Giving up */
|
|
pc->error = IDE_DRV_ERROR_GENERAL;
|
|
|
|
drive->failed_pc = NULL;
|
|
drive->pc_callback(drive, 0);
|
|
ide_complete_rq(drive, -EIO, done);
|
|
return ide_stopped;
|
|
}
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries);
|
|
|
|
pc->retries++;
|
|
|
|
return ide_issue_pc(drive, cmd);
|
|
}
|
|
|
|
void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
|
|
{
|
|
ide_init_pc(pc);
|
|
pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
|
|
pc->c[7] = 255;
|
|
pc->c[8] = 255;
|
|
pc->req_xfer = 255;
|
|
}
|
|
|
|
/* A mode sense command is used to "sense" floppy parameters. */
|
|
void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
|
|
{
|
|
u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
|
|
|
|
ide_init_pc(pc);
|
|
pc->c[0] = GPCMD_MODE_SENSE_10;
|
|
pc->c[1] = 0;
|
|
pc->c[2] = page_code;
|
|
|
|
switch (page_code) {
|
|
case IDEFLOPPY_CAPABILITIES_PAGE:
|
|
length += 12;
|
|
break;
|
|
case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
|
|
length += 32;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
|
|
}
|
|
put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
|
|
pc->req_xfer = length;
|
|
}
|
|
|
|
static void idefloppy_create_rw_cmd(ide_drive_t *drive,
|
|
struct ide_atapi_pc *pc, struct request *rq,
|
|
unsigned long sector)
|
|
{
|
|
struct ide_disk_obj *floppy = drive->driver_data;
|
|
int block = sector / floppy->bs_factor;
|
|
int blocks = blk_rq_sectors(rq) / floppy->bs_factor;
|
|
int cmd = rq_data_dir(rq);
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", block, blocks);
|
|
|
|
ide_init_pc(pc);
|
|
pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
|
|
put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
|
|
put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
|
|
|
|
memcpy(rq->cmd, pc->c, 12);
|
|
|
|
pc->rq = rq;
|
|
if (cmd == WRITE)
|
|
pc->flags |= PC_FLAG_WRITING;
|
|
|
|
pc->flags |= PC_FLAG_DMA_OK;
|
|
}
|
|
|
|
static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
|
|
struct ide_atapi_pc *pc, struct request *rq)
|
|
{
|
|
ide_init_pc(pc);
|
|
memcpy(pc->c, rq->cmd, sizeof(pc->c));
|
|
pc->rq = rq;
|
|
if (blk_rq_bytes(rq)) {
|
|
pc->flags |= PC_FLAG_DMA_OK;
|
|
if (rq_data_dir(rq) == WRITE)
|
|
pc->flags |= PC_FLAG_WRITING;
|
|
}
|
|
}
|
|
|
|
static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
|
|
struct request *rq, sector_t block)
|
|
{
|
|
struct ide_disk_obj *floppy = drive->driver_data;
|
|
struct ide_cmd cmd;
|
|
struct ide_atapi_pc *pc;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]);
|
|
|
|
if (drive->debug_mask & IDE_DBG_RQ)
|
|
blk_dump_rq_flags(rq, (rq->rq_disk
|
|
? rq->rq_disk->disk_name
|
|
: "dev?"));
|
|
|
|
if (rq->errors >= ERROR_MAX) {
|
|
if (drive->failed_pc) {
|
|
ide_floppy_report_error(floppy, drive->failed_pc);
|
|
drive->failed_pc = NULL;
|
|
} else
|
|
printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
|
|
|
|
if (rq->cmd_type == REQ_TYPE_DRV_PRIV) {
|
|
rq->errors = 0;
|
|
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
|
|
return ide_stopped;
|
|
} else
|
|
goto out_end;
|
|
}
|
|
|
|
switch (rq->cmd_type) {
|
|
case REQ_TYPE_FS:
|
|
if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
|
|
(blk_rq_sectors(rq) % floppy->bs_factor)) {
|
|
printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
|
|
drive->name);
|
|
goto out_end;
|
|
}
|
|
pc = &floppy->queued_pc;
|
|
idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
|
|
break;
|
|
case REQ_TYPE_DRV_PRIV:
|
|
case REQ_TYPE_ATA_SENSE:
|
|
pc = (struct ide_atapi_pc *)rq->special;
|
|
break;
|
|
case REQ_TYPE_BLOCK_PC:
|
|
pc = &floppy->queued_pc;
|
|
idefloppy_blockpc_cmd(floppy, pc, rq);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
ide_prep_sense(drive, rq);
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
if (rq_data_dir(rq))
|
|
cmd.tf_flags |= IDE_TFLAG_WRITE;
|
|
|
|
cmd.rq = rq;
|
|
|
|
if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
|
|
ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
|
|
ide_map_sg(drive, &cmd);
|
|
}
|
|
|
|
pc->rq = rq;
|
|
|
|
return ide_floppy_issue_pc(drive, &cmd, pc);
|
|
out_end:
|
|
drive->failed_pc = NULL;
|
|
if (rq->cmd_type != REQ_TYPE_FS && rq->errors == 0)
|
|
rq->errors = -EIO;
|
|
ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
|
|
return ide_stopped;
|
|
}
|
|
|
|
/*
|
|
* Look at the flexible disk page parameters. We ignore the CHS capacity
|
|
* parameters and use the LBA parameters instead.
|
|
*/
|
|
static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
|
|
struct ide_atapi_pc *pc)
|
|
{
|
|
struct ide_disk_obj *floppy = drive->driver_data;
|
|
struct gendisk *disk = floppy->disk;
|
|
u8 *page, buf[40];
|
|
int capacity, lba_capacity;
|
|
u16 transfer_rate, sector_size, cyls, rpm;
|
|
u8 heads, sectors;
|
|
|
|
ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
|
|
|
|
if (ide_queue_pc_tail(drive, disk, pc, buf, pc->req_xfer)) {
|
|
printk(KERN_ERR PFX "Can't get flexible disk page params\n");
|
|
return 1;
|
|
}
|
|
|
|
if (buf[3] & 0x80)
|
|
drive->dev_flags |= IDE_DFLAG_WP;
|
|
else
|
|
drive->dev_flags &= ~IDE_DFLAG_WP;
|
|
|
|
set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));
|
|
|
|
page = &buf[8];
|
|
|
|
transfer_rate = be16_to_cpup((__be16 *)&buf[8 + 2]);
|
|
sector_size = be16_to_cpup((__be16 *)&buf[8 + 6]);
|
|
cyls = be16_to_cpup((__be16 *)&buf[8 + 8]);
|
|
rpm = be16_to_cpup((__be16 *)&buf[8 + 28]);
|
|
heads = buf[8 + 4];
|
|
sectors = buf[8 + 5];
|
|
|
|
capacity = cyls * heads * sectors * sector_size;
|
|
|
|
if (memcmp(page, &floppy->flexible_disk_page, 32))
|
|
printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
|
|
"%d sector size, %d rpm\n",
|
|
drive->name, capacity / 1024, cyls, heads,
|
|
sectors, transfer_rate / 8, sector_size, rpm);
|
|
|
|
memcpy(&floppy->flexible_disk_page, page, 32);
|
|
drive->bios_cyl = cyls;
|
|
drive->bios_head = heads;
|
|
drive->bios_sect = sectors;
|
|
lba_capacity = floppy->blocks * floppy->block_size;
|
|
|
|
if (capacity < lba_capacity) {
|
|
printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
|
|
"bytes, but the drive only handles %d\n",
|
|
drive->name, lba_capacity, capacity);
|
|
floppy->blocks = floppy->block_size ?
|
|
capacity / floppy->block_size : 0;
|
|
drive->capacity64 = floppy->blocks * floppy->bs_factor;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Determine if a media is present in the floppy drive, and if so, its LBA
|
|
* capacity.
|
|
*/
|
|
static int ide_floppy_get_capacity(ide_drive_t *drive)
|
|
{
|
|
struct ide_disk_obj *floppy = drive->driver_data;
|
|
struct gendisk *disk = floppy->disk;
|
|
struct ide_atapi_pc pc;
|
|
u8 *cap_desc;
|
|
u8 pc_buf[256], header_len, desc_cnt;
|
|
int i, rc = 1, blocks, length;
|
|
|
|
ide_debug_log(IDE_DBG_FUNC, "enter");
|
|
|
|
drive->bios_cyl = 0;
|
|
drive->bios_head = drive->bios_sect = 0;
|
|
floppy->blocks = 0;
|
|
floppy->bs_factor = 1;
|
|
drive->capacity64 = 0;
|
|
|
|
ide_floppy_create_read_capacity_cmd(&pc);
|
|
if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
|
|
printk(KERN_ERR PFX "Can't get floppy parameters\n");
|
|
return 1;
|
|
}
|
|
header_len = pc_buf[3];
|
|
cap_desc = &pc_buf[4];
|
|
desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
|
|
|
|
for (i = 0; i < desc_cnt; i++) {
|
|
unsigned int desc_start = 4 + i*8;
|
|
|
|
blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
|
|
length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
|
|
|
|
ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
|
|
"%d sector size",
|
|
i, blocks * length / 1024,
|
|
blocks, length);
|
|
|
|
if (i)
|
|
continue;
|
|
/*
|
|
* the code below is valid only for the 1st descriptor, ie i=0
|
|
*/
|
|
|
|
switch (pc_buf[desc_start + 4] & 0x03) {
|
|
/* Clik! drive returns this instead of CAPACITY_CURRENT */
|
|
case CAPACITY_UNFORMATTED:
|
|
if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
|
|
/*
|
|
* If it is not a clik drive, break out
|
|
* (maintains previous driver behaviour)
|
|
*/
|
|
break;
|
|
case CAPACITY_CURRENT:
|
|
/* Normal Zip/LS-120 disks */
|
|
if (memcmp(cap_desc, &floppy->cap_desc, 8))
|
|
printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
|
|
"sector size\n",
|
|
drive->name, blocks * length / 1024,
|
|
blocks, length);
|
|
memcpy(&floppy->cap_desc, cap_desc, 8);
|
|
|
|
if (!length || length % 512) {
|
|
printk(KERN_NOTICE PFX "%s: %d bytes block size"
|
|
" not supported\n", drive->name, length);
|
|
} else {
|
|
floppy->blocks = blocks;
|
|
floppy->block_size = length;
|
|
floppy->bs_factor = length / 512;
|
|
if (floppy->bs_factor != 1)
|
|
printk(KERN_NOTICE PFX "%s: Warning: "
|
|
"non 512 bytes block size not "
|
|
"fully supported\n",
|
|
drive->name);
|
|
drive->capacity64 =
|
|
floppy->blocks * floppy->bs_factor;
|
|
rc = 0;
|
|
}
|
|
break;
|
|
case CAPACITY_NO_CARTRIDGE:
|
|
/*
|
|
* This is a KERN_ERR so it appears on screen
|
|
* for the user to see
|
|
*/
|
|
printk(KERN_ERR PFX "%s: No disk in drive\n",
|
|
drive->name);
|
|
break;
|
|
case CAPACITY_INVALID:
|
|
printk(KERN_ERR PFX "%s: Invalid capacity for disk "
|
|
"in drive\n", drive->name);
|
|
break;
|
|
}
|
|
ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
|
|
pc_buf[desc_start + 4] & 0x03);
|
|
}
|
|
|
|
/* Clik! disk does not support get_flexible_disk_page */
|
|
if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
|
|
(void) ide_floppy_get_flexible_disk_page(drive, &pc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void ide_floppy_setup(ide_drive_t *drive)
|
|
{
|
|
struct ide_disk_obj *floppy = drive->driver_data;
|
|
u16 *id = drive->id;
|
|
|
|
drive->pc_callback = ide_floppy_callback;
|
|
|
|
/*
|
|
* We used to check revisions here. At this point however I'm giving up.
|
|
* Just assume they are all broken, its easier.
|
|
*
|
|
* The actual reason for the workarounds was likely a driver bug after
|
|
* all rather than a firmware bug, and the workaround below used to hide
|
|
* it. It should be fixed as of version 1.9, but to be on the safe side
|
|
* we'll leave the limitation below for the 2.2.x tree.
|
|
*/
|
|
if (strstarts((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI")) {
|
|
drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
|
|
/* This value will be visible in the /proc/ide/hdx/settings */
|
|
drive->pc_delay = IDEFLOPPY_PC_DELAY;
|
|
blk_queue_max_hw_sectors(drive->queue, 64);
|
|
}
|
|
|
|
/*
|
|
* Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
|
|
* nasty clicking noises without it, so please don't remove this.
|
|
*/
|
|
if (strstarts((char *)&id[ATA_ID_PROD], "IOMEGA Clik!")) {
|
|
blk_queue_max_hw_sectors(drive->queue, 64);
|
|
drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
|
|
/* IOMEGA Clik! drives do not support lock/unlock commands */
|
|
drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
|
|
}
|
|
|
|
(void) ide_floppy_get_capacity(drive);
|
|
|
|
ide_proc_register_driver(drive, floppy->driver);
|
|
|
|
drive->dev_flags |= IDE_DFLAG_ATTACH;
|
|
}
|
|
|
|
static void ide_floppy_flush(ide_drive_t *drive)
|
|
{
|
|
}
|
|
|
|
static int ide_floppy_init_media(ide_drive_t *drive, struct gendisk *disk)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (ide_do_test_unit_ready(drive, disk))
|
|
ide_do_start_stop(drive, disk, 1);
|
|
|
|
ret = ide_floppy_get_capacity(drive);
|
|
|
|
set_capacity(disk, ide_gd_capacity(drive));
|
|
|
|
return ret;
|
|
}
|
|
|
|
const struct ide_disk_ops ide_atapi_disk_ops = {
|
|
.check = ide_check_atapi_device,
|
|
.get_capacity = ide_floppy_get_capacity,
|
|
.setup = ide_floppy_setup,
|
|
.flush = ide_floppy_flush,
|
|
.init_media = ide_floppy_init_media,
|
|
.set_doorlock = ide_set_media_lock,
|
|
.do_request = ide_floppy_do_request,
|
|
.ioctl = ide_floppy_ioctl,
|
|
};
|