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linux-next/drivers/ide/ide-floppy.c
Bartlomiej Zolnierkiewicz 08da591e14 ide: add ide_device_{get,put}() helpers 
* Add 'struct ide_host *host' field to ide_hwif_t and set it
  in ide_host_alloc_all().

* Add ide_device_{get,put}() helpers loosely based on SCSI's
  scsi_device_{get,put}() ones.

* Convert IDE device drivers to use ide_device_{get,put}().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-07-24 22:53:15 +02:00

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/*
* 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
*/
#define IDEFLOPPY_VERSION "1.00"
#include <linux/module.h>
#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/slab.h>
#include <linux/cdrom.h>
#include <linux/ide.h>
#include <linux/bitops.h>
#include <linux/mutex.h>
#include <scsi/scsi_ioctl.h>
#include <asm/byteorder.h>
#include <linux/irq.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <asm/unaligned.h>
/* define to see debug info */
#define IDEFLOPPY_DEBUG_LOG 0
/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
#define IDEFLOPPY_DEBUG(fmt, args...)
#if IDEFLOPPY_DEBUG_LOG
#define debug_log(fmt, args...) \
printk(KERN_INFO "ide-floppy: " fmt, ## args)
#else
#define debug_log(fmt, args...) do {} while (0)
#endif
/* Some drives require a longer irq timeout. */
#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
/*
* 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
/*
* With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
* bytes.
*/
#define IDEFLOPPY_PC_BUFFER_SIZE 256
/*
* In various places in the driver, we need to allocate storage for packet
* commands and requests, which will remain valid while we leave the driver to
* wait for an interrupt or a timeout event.
*/
#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
/* format capacities descriptor codes */
#define CAPACITY_INVALID 0x00
#define CAPACITY_UNFORMATTED 0x01
#define CAPACITY_CURRENT 0x02
#define CAPACITY_NO_CARTRIDGE 0x03
/*
* Most of our global data which we need to save even as we leave the driver
* due to an interrupt or a timer event is stored in a variable of type
* idefloppy_floppy_t, defined below.
*/
typedef struct ide_floppy_obj {
ide_drive_t *drive;
ide_driver_t *driver;
struct gendisk *disk;
struct kref kref;
unsigned int openers; /* protected by BKL for now */
/* Current packet command */
struct ide_atapi_pc *pc;
/* Last failed packet command */
struct ide_atapi_pc *failed_pc;
/* Packet command stack */
struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
/* Next free packet command storage space */
int pc_stack_index;
struct request rq_stack[IDEFLOPPY_PC_STACK];
/* We implement a circular array */
int rq_stack_index;
/* Last error information */
u8 sense_key, asc, ascq;
/* delay this long before sending packet command */
u8 ticks;
int progress_indication;
/* Device information */
/* Current format */
int blocks, block_size, bs_factor;
/* Last format capacity descriptor */
u8 cap_desc[8];
/* Copy of the flexible disk page */
u8 flexible_disk_page[32];
/* Write protect */
int wp;
/* Supports format progress report */
int srfp;
} idefloppy_floppy_t;
#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
/* Defines for the MODE SENSE command */
#define MODE_SENSE_CURRENT 0x00
#define MODE_SENSE_CHANGEABLE 0x01
#define MODE_SENSE_DEFAULT 0x02
#define MODE_SENSE_SAVED 0x03
/* IOCTLs used in low-level formatting. */
#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
/* Error code returned in rq->errors to the higher part of the driver. */
#define IDEFLOPPY_ERROR_GENERAL 101
/*
* Pages of the SELECT SENSE / MODE SENSE packet commands.
* See SFF-8070i spec.
*/
#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
static DEFINE_MUTEX(idefloppy_ref_mutex);
#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
#define ide_floppy_g(disk) \
container_of((disk)->private_data, struct ide_floppy_obj, driver)
static void idefloppy_cleanup_obj(struct kref *);
static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
{
struct ide_floppy_obj *floppy = NULL;
mutex_lock(&idefloppy_ref_mutex);
floppy = ide_floppy_g(disk);
if (floppy) {
kref_get(&floppy->kref);
if (ide_device_get(floppy->drive)) {
kref_put(&floppy->kref, idefloppy_cleanup_obj);
floppy = NULL;
}
}
mutex_unlock(&idefloppy_ref_mutex);
return floppy;
}
static void ide_floppy_put(struct ide_floppy_obj *floppy)
{
mutex_lock(&idefloppy_ref_mutex);
ide_device_put(floppy->drive);
kref_put(&floppy->kref, idefloppy_cleanup_obj);
mutex_unlock(&idefloppy_ref_mutex);
}
/*
* Used to finish servicing a request. For read/write requests, we will call
* ide_end_request to pass to the next buffer.
*/
static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct request *rq = HWGROUP(drive)->rq;
int error;
debug_log("Reached %s\n", __func__);
switch (uptodate) {
case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
case 1: error = 0; break;
default: error = uptodate;
}
if (error)
floppy->failed_pc = NULL;
/* Why does this happen? */
if (!rq)
return 0;
if (!blk_special_request(rq)) {
/* our real local end request function */
ide_end_request(drive, uptodate, nsecs);
return 0;
}
rq->errors = error;
/* fixme: need to move this local also */
ide_end_drive_cmd(drive, 0, 0);
return 0;
}
static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
unsigned int bcount, int direction)
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = pc->rq;
struct req_iterator iter;
struct bio_vec *bvec;
unsigned long flags;
int count, done = 0;
char *data;
rq_for_each_segment(bvec, rq, iter) {
if (!bcount)
break;
count = min(bvec->bv_len, bcount);
data = bvec_kmap_irq(bvec, &flags);
if (direction)
hwif->tp_ops->output_data(drive, NULL, data, count);
else
hwif->tp_ops->input_data(drive, NULL, data, count);
bvec_kunmap_irq(data, &flags);
bcount -= count;
pc->b_count += count;
done += count;
}
idefloppy_end_request(drive, 1, done >> 9);
if (bcount) {
printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
drive->name, __func__, bcount);
ide_pad_transfer(drive, direction, bcount);
}
}
static void idefloppy_update_buffers(ide_drive_t *drive,
struct ide_atapi_pc *pc)
{
struct request *rq = pc->rq;
struct bio *bio = rq->bio;
while ((bio = rq->bio) != NULL)
idefloppy_end_request(drive, 1, 0);
}
/*
* Generate a new packet command request in front of the request queue, before
* the current request so that it will be processed immediately, on the next
* pass through the driver.
*/
static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
struct request *rq)
{
struct ide_floppy_obj *floppy = drive->driver_data;
blk_rq_init(NULL, rq);
rq->buffer = (char *) pc;
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd_flags |= REQ_PREEMPT;
rq->rq_disk = floppy->disk;
memcpy(rq->cmd, pc->c, 12);
ide_do_drive_cmd(drive, rq);
}
static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
floppy->pc_stack_index = 0;
return (&floppy->pc_stack[floppy->pc_stack_index++]);
}
static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
floppy->rq_stack_index = 0;
return (&floppy->rq_stack[floppy->rq_stack_index++]);
}
static void ide_floppy_callback(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc *pc = floppy->pc;
int uptodate = pc->error ? 0 : 1;
debug_log("Reached %s\n", __func__);
if (floppy->failed_pc == pc)
floppy->failed_pc = NULL;
if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
(pc->rq && blk_pc_request(pc->rq)))
uptodate = 1; /* FIXME */
else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
u8 *buf = floppy->pc->buf;
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 (floppy->failed_pc)
debug_log("pc = %x, ", floppy->failed_pc->c[0]);
debug_log("sense key = %x, asc = %x, ascq = %x\n",
floppy->sense_key, floppy->asc, floppy->ascq);
} else
printk(KERN_ERR "Error in REQUEST SENSE itself - "
"Aborting request!\n");
}
idefloppy_end_request(drive, uptodate, 0);
}
static void idefloppy_init_pc(struct ide_atapi_pc *pc)
{
memset(pc, 0, sizeof(*pc));
pc->buf = pc->pc_buf;
pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
}
static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_REQUEST_SENSE;
pc->c[4] = 255;
pc->req_xfer = 18;
}
/*
* Called when an error was detected during the last packet command. We queue a
* request sense packet command in the head of the request list.
*/
static void idefloppy_retry_pc(ide_drive_t *drive)
{
struct ide_atapi_pc *pc;
struct request *rq;
(void)ide_read_error(drive);
pc = idefloppy_next_pc_storage(drive);
rq = idefloppy_next_rq_storage(drive);
idefloppy_create_request_sense_cmd(pc);
idefloppy_queue_pc_head(drive, pc, rq);
}
/* The usual interrupt handler called during a packet command. */
static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
}
/*
* What we have here is a classic case of a top half / bottom half interrupt
* service routine. In interrupt mode, the device sends an interrupt to signal
* that it is ready to receive a packet. However, we need to delay about 2-3
* ticks before issuing the packet or we gets in trouble.
*/
static int idefloppy_transfer_pc(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
/* Send the actual packet */
drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
/* Timeout for the packet command */
return IDEFLOPPY_WAIT_CMD;
}
/*
* Called as an interrupt (or directly). When the device says it's ready for a
* packet, we schedule the packet transfer to occur about 2-3 ticks later in
* transfer_pc.
*/
static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc *pc = floppy->pc;
ide_expiry_t *expiry;
unsigned int timeout;
/*
* The following delay solves a problem with ATAPI Zip 100 drives
* where the Busy flag was apparently being deasserted before the
* unit was ready to receive data. This was happening on a
* 1200 MHz Athlon system. 10/26/01 25msec is too short,
* 40 and 50msec work well. idefloppy_pc_intr will not be actually
* used until after the packet is moved in about 50 msec.
*/
if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
timeout = floppy->ticks;
expiry = &idefloppy_transfer_pc;
} else {
timeout = IDEFLOPPY_WAIT_CMD;
expiry = NULL;
}
return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
}
static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
struct ide_atapi_pc *pc)
{
/* supress error messages resulting from Medium not present */
if (floppy->sense_key == 0x02 &&
floppy->asc == 0x3a &&
floppy->ascq == 0x00)
return;
printk(KERN_ERR "ide-floppy: %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 idefloppy_issue_pc(ide_drive_t *drive,
struct ide_atapi_pc *pc)
{
idefloppy_floppy_t *floppy = drive->driver_data;
if (floppy->failed_pc == NULL &&
pc->c[0] != GPCMD_REQUEST_SENSE)
floppy->failed_pc = pc;
/* Set the current packet command */
floppy->pc = pc;
if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
ide_floppy_report_error(floppy, pc);
/* Giving up */
pc->error = IDEFLOPPY_ERROR_GENERAL;
floppy->failed_pc = NULL;
drive->pc_callback(drive);
return ide_stopped;
}
debug_log("Retry number - %d\n", pc->retries);
pc->retries++;
return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
IDEFLOPPY_WAIT_CMD, NULL);
}
static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
{
debug_log("creating prevent removal command, prevent = %d\n", prevent);
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
pc->c[4] = prevent;
}
static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
pc->c[7] = 255;
pc->c[8] = 255;
pc->req_xfer = 255;
}
static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
int l, int flags)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_FORMAT_UNIT;
pc->c[1] = 0x17;
memset(pc->buf, 0, 12);
pc->buf[1] = 0xA2;
/* Default format list header, u8 1: FOV/DCRT/IMM bits set */
if (flags & 1) /* Verify bit on... */
pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */
pc->buf[3] = 8;
put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
pc->buf_size = 12;
pc->flags |= PC_FLAG_WRITING;
}
/* A mode sense command is used to "sense" floppy parameters. */
static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
u8 page_code, u8 type)
{
u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_MODE_SENSE_10;
pc->c[1] = 0;
pc->c[2] = page_code + (type << 6);
switch (page_code) {
case IDEFLOPPY_CAPABILITIES_PAGE:
length += 12;
break;
case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
length += 32;
break;
default:
printk(KERN_ERR "ide-floppy: unsupported page code "
"in create_mode_sense_cmd\n");
}
put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
pc->req_xfer = length;
}
static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_START_STOP_UNIT;
pc->c[4] = start;
}
static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
struct ide_atapi_pc *pc, struct request *rq,
unsigned long sector)
{
int block = sector / floppy->bs_factor;
int blocks = rq->nr_sectors / floppy->bs_factor;
int cmd = rq_data_dir(rq);
debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
block, blocks);
idefloppy_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;
pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
if (rq->cmd_flags & REQ_RW)
pc->flags |= PC_FLAG_WRITING;
pc->buf = NULL;
pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
pc->flags |= PC_FLAG_DMA_OK;
}
static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
struct ide_atapi_pc *pc, struct request *rq)
{
idefloppy_init_pc(pc);
memcpy(pc->c, rq->cmd, sizeof(pc->c));
pc->rq = rq;
pc->b_count = rq->data_len;
if (rq->data_len && rq_data_dir(rq) == WRITE)
pc->flags |= PC_FLAG_WRITING;
pc->buf = rq->data;
if (rq->bio)
pc->flags |= PC_FLAG_DMA_OK;
/*
* possibly problematic, doesn't look like ide-floppy correctly
* handled scattered requests if dma fails...
*/
pc->req_xfer = pc->buf_size = rq->data_len;
}
static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
struct request *rq, sector_t block_s)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc *pc;
unsigned long block = (unsigned long)block_s;
debug_log("dev: %s, cmd_type: %x, errors: %d\n",
rq->rq_disk ? rq->rq_disk->disk_name : "?",
rq->cmd_type, rq->errors);
debug_log("sector: %ld, nr_sectors: %ld, "
"current_nr_sectors: %d\n", (long)rq->sector,
rq->nr_sectors, rq->current_nr_sectors);
if (rq->errors >= ERROR_MAX) {
if (floppy->failed_pc)
ide_floppy_report_error(floppy, floppy->failed_pc);
else
printk(KERN_ERR "ide-floppy: %s: I/O error\n",
drive->name);
idefloppy_end_request(drive, 0, 0);
return ide_stopped;
}
if (blk_fs_request(rq)) {
if (((long)rq->sector % floppy->bs_factor) ||
(rq->nr_sectors % floppy->bs_factor)) {
printk(KERN_ERR "%s: unsupported r/w request size\n",
drive->name);
idefloppy_end_request(drive, 0, 0);
return ide_stopped;
}
pc = idefloppy_next_pc_storage(drive);
idefloppy_create_rw_cmd(floppy, pc, rq, block);
} else if (blk_special_request(rq)) {
pc = (struct ide_atapi_pc *) rq->buffer;
} else if (blk_pc_request(rq)) {
pc = idefloppy_next_pc_storage(drive);
idefloppy_blockpc_cmd(floppy, pc, rq);
} else {
blk_dump_rq_flags(rq,
"ide-floppy: unsupported command in queue");
idefloppy_end_request(drive, 0, 0);
return ide_stopped;
}
pc->rq = rq;
return idefloppy_issue_pc(drive, pc);
}
/*
* Add a special packet command request to the tail of the request queue,
* and wait for it to be serviced.
*/
static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
{
struct ide_floppy_obj *floppy = drive->driver_data;
struct request *rq;
int error;
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
rq->buffer = (char *) pc;
rq->cmd_type = REQ_TYPE_SPECIAL;
memcpy(rq->cmd, pc->c, 12);
error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
blk_put_request(rq);
return error;
}
/*
* 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)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc pc;
u8 *page;
int capacity, lba_capacity;
u16 transfer_rate, sector_size, cyls, rpm;
u8 heads, sectors;
idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
MODE_SENSE_CURRENT);
if (idefloppy_queue_pc_tail(drive, &pc)) {
printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
" parameters\n");
return 1;
}
floppy->wp = !!(pc.buf[3] & 0x80);
set_disk_ro(floppy->disk, floppy->wp);
page = &pc.buf[8];
transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
heads = pc.buf[8 + 4];
sectors = pc.buf[8 + 5];
capacity = cyls * heads * sectors * sector_size;
if (memcmp(page, &floppy->flexible_disk_page, 32))
printk(KERN_INFO "%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 "%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;
}
return 0;
}
static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc pc;
floppy->srfp = 0;
idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
MODE_SENSE_CURRENT);
pc.flags |= PC_FLAG_SUPPRESS_ERROR;
if (idefloppy_queue_pc_tail(drive, &pc))
return 1;
floppy->srfp = pc.buf[8 + 2] & 0x40;
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)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc pc;
u8 *cap_desc;
u8 header_len, desc_cnt;
int i, rc = 1, blocks, length;
drive->bios_cyl = 0;
drive->bios_head = drive->bios_sect = 0;
floppy->blocks = 0;
floppy->bs_factor = 1;
set_capacity(floppy->disk, 0);
idefloppy_create_read_capacity_cmd(&pc);
if (idefloppy_queue_pc_tail(drive, &pc)) {
printk(KERN_ERR "ide-floppy: 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]);
debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
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 "%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 "%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 "%s: warning: non "
"512 bytes block size not "
"fully supported\n",
drive->name);
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 "%s: No disk in drive\n", drive->name);
break;
case CAPACITY_INVALID:
printk(KERN_ERR "%s: Invalid capacity for disk "
"in drive\n", drive->name);
break;
}
debug_log("Descriptor 0 Code: %d\n",
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);
set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
return rc;
}
/*
* Obtain the list of formattable capacities.
* Very similar to ide_floppy_get_capacity, except that we push the capacity
* descriptors to userland, instead of our own structures.
*
* Userland gives us the following structure:
*
* struct idefloppy_format_capacities {
* int nformats;
* struct {
* int nblocks;
* int blocksize;
* } formats[];
* };
*
* userland initializes nformats to the number of allocated formats[] records.
* On exit we set nformats to the number of records we've actually initialized.
*/
static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
{
struct ide_atapi_pc pc;
u8 header_len, desc_cnt;
int i, blocks, length, u_array_size, u_index;
int __user *argp;
if (get_user(u_array_size, arg))
return (-EFAULT);
if (u_array_size <= 0)
return (-EINVAL);
idefloppy_create_read_capacity_cmd(&pc);
if (idefloppy_queue_pc_tail(drive, &pc)) {
printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
return (-EIO);
}
header_len = pc.buf[3];
desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
u_index = 0;
argp = arg + 1;
/*
* We always skip the first capacity descriptor. That's the current
* capacity. We are interested in the remaining descriptors, the
* formattable capacities.
*/
for (i = 1; i < desc_cnt; i++) {
unsigned int desc_start = 4 + i*8;
if (u_index >= u_array_size)
break; /* User-supplied buffer too small */
blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
if (put_user(blocks, argp))
return(-EFAULT);
++argp;
if (put_user(length, argp))
return (-EFAULT);
++argp;
++u_index;
}
if (put_user(u_index, arg))
return (-EFAULT);
return (0);
}
/*
* Get ATAPI_FORMAT_UNIT progress indication.
*
* Userland gives a pointer to an int. The int is set to a progress
* indicator 0-65536, with 65536=100%.
*
* If the drive does not support format progress indication, we just check
* the dsc bit, and return either 0 or 65536.
*/
static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct ide_atapi_pc pc;
int progress_indication = 0x10000;
if (floppy->srfp) {
idefloppy_create_request_sense_cmd(&pc);
if (idefloppy_queue_pc_tail(drive, &pc))
return (-EIO);
if (floppy->sense_key == 2 &&
floppy->asc == 4 &&
floppy->ascq == 4)
progress_indication = floppy->progress_indication;
/* Else assume format_unit has finished, and we're at 0x10000 */
} else {
ide_hwif_t *hwif = drive->hwif;
unsigned long flags;
u8 stat;
local_irq_save(flags);
stat = hwif->tp_ops->read_status(hwif);
local_irq_restore(flags);
progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
}
if (put_user(progress_indication, arg))
return (-EFAULT);
return (0);
}
static sector_t idefloppy_capacity(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
unsigned long capacity = floppy->blocks * floppy->bs_factor;
return capacity;
}
/*
* Check whether we can support a drive, based on the ATAPI IDENTIFY command
* results.
*/
static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
{
u8 gcw[2];
u8 device_type, protocol, removable, drq_type, packet_size;
*((u16 *) &gcw) = id->config;
device_type = gcw[1] & 0x1F;
removable = (gcw[0] & 0x80) >> 7;
protocol = (gcw[1] & 0xC0) >> 6;
drq_type = (gcw[0] & 0x60) >> 5;
packet_size = gcw[0] & 0x03;
#ifdef CONFIG_PPC
/* kludge for Apple PowerBook internal zip */
if (device_type == 5 &&
!strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
device_type = 0;
#endif
if (protocol != 2)
printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
protocol);
else if (device_type != 0)
printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
"to floppy\n", device_type);
else if (!removable)
printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
else if (drq_type == 3)
printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
"supported\n", drq_type);
else if (packet_size != 0)
printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
"bytes\n", packet_size);
else
return 1;
return 0;
}
#ifdef CONFIG_IDE_PROC_FS
static void idefloppy_add_settings(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
&drive->bios_cyl, NULL);
ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
&drive->bios_head, NULL);
ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1,
&drive->bios_sect, NULL);
ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
&floppy->ticks, NULL);
}
#else
static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
#endif
static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
{
u8 gcw[2];
*((u16 *) &gcw) = drive->id->config;
floppy->pc = floppy->pc_stack;
drive->pc_callback = ide_floppy_callback;
if (((gcw[0] & 0x60) >> 5) == 1)
drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
/*
* 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 (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
/* This value will be visible in the /proc/ide/hdx/settings */
floppy->ticks = IDEFLOPPY_TICKS_DELAY;
blk_queue_max_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 (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
blk_queue_max_sectors(drive->queue, 64);
drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
}
(void) ide_floppy_get_capacity(drive);
idefloppy_add_settings(drive);
}
static void ide_floppy_remove(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct gendisk *g = floppy->disk;
ide_proc_unregister_driver(drive, floppy->driver);
del_gendisk(g);
ide_floppy_put(floppy);
}
static void idefloppy_cleanup_obj(struct kref *kref)
{
struct ide_floppy_obj *floppy = to_ide_floppy(kref);
ide_drive_t *drive = floppy->drive;
struct gendisk *g = floppy->disk;
drive->driver_data = NULL;
g->private_data = NULL;
put_disk(g);
kfree(floppy);
}
#ifdef CONFIG_IDE_PROC_FS
static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
ide_drive_t*drive = (ide_drive_t *)data;
int len;
len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
}
static ide_proc_entry_t idefloppy_proc[] = {
{ "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
{ "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
{ NULL, 0, NULL, NULL }
};
#endif /* CONFIG_IDE_PROC_FS */
static int ide_floppy_probe(ide_drive_t *);
static ide_driver_t idefloppy_driver = {
.gen_driver = {
.owner = THIS_MODULE,
.name = "ide-floppy",
.bus = &ide_bus_type,
},
.probe = ide_floppy_probe,
.remove = ide_floppy_remove,
.version = IDEFLOPPY_VERSION,
.media = ide_floppy,
.supports_dsc_overlap = 0,
.do_request = idefloppy_do_request,
.end_request = idefloppy_end_request,
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc = idefloppy_proc,
#endif
};
static int idefloppy_open(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct ide_floppy_obj *floppy;
ide_drive_t *drive;
struct ide_atapi_pc pc;
int ret = 0;
debug_log("Reached %s\n", __func__);
floppy = ide_floppy_get(disk);
if (!floppy)
return -ENXIO;
drive = floppy->drive;
floppy->openers++;
if (floppy->openers == 1) {
drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
/* Just in case */
idefloppy_init_pc(&pc);
pc.c[0] = GPCMD_TEST_UNIT_READY;
if (idefloppy_queue_pc_tail(drive, &pc)) {
idefloppy_create_start_stop_cmd(&pc, 1);
(void) idefloppy_queue_pc_tail(drive, &pc);
}
if (ide_floppy_get_capacity(drive)
&& (filp->f_flags & O_NDELAY) == 0
/*
* Allow O_NDELAY to open a drive without a disk, or with an
* unreadable disk, so that we can get the format capacity
* of the drive or begin the format - Sam
*/
) {
ret = -EIO;
goto out_put_floppy;
}
if (floppy->wp && (filp->f_mode & 2)) {
ret = -EROFS;
goto out_put_floppy;
}
drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
/* IOMEGA Clik! drives do not support lock/unlock commands */
if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
idefloppy_create_prevent_cmd(&pc, 1);
(void) idefloppy_queue_pc_tail(drive, &pc);
}
check_disk_change(inode->i_bdev);
} else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
ret = -EBUSY;
goto out_put_floppy;
}
return 0;
out_put_floppy:
floppy->openers--;
ide_floppy_put(floppy);
return ret;
}
static int idefloppy_release(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct ide_floppy_obj *floppy = ide_floppy_g(disk);
ide_drive_t *drive = floppy->drive;
struct ide_atapi_pc pc;
debug_log("Reached %s\n", __func__);
if (floppy->openers == 1) {
/* IOMEGA Clik! drives do not support lock/unlock commands */
if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
idefloppy_create_prevent_cmd(&pc, 0);
(void) idefloppy_queue_pc_tail(drive, &pc);
}
drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
}
floppy->openers--;
ide_floppy_put(floppy);
return 0;
}
static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
ide_drive_t *drive = floppy->drive;
geo->heads = drive->bios_head;
geo->sectors = drive->bios_sect;
geo->cylinders = (u16)drive->bios_cyl; /* truncate */
return 0;
}
static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
unsigned long arg, unsigned int cmd)
{
idefloppy_floppy_t *floppy = drive->driver_data;
if (floppy->openers > 1)
return -EBUSY;
/* The IOMEGA Clik! Drive doesn't support this command -
* no room for an eject mechanism */
if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
int prevent = arg ? 1 : 0;
if (cmd == CDROMEJECT)
prevent = 0;
idefloppy_create_prevent_cmd(pc, prevent);
(void) idefloppy_queue_pc_tail(floppy->drive, pc);
}
if (cmd == CDROMEJECT) {
idefloppy_create_start_stop_cmd(pc, 2);
(void) idefloppy_queue_pc_tail(floppy->drive, pc);
}
return 0;
}
static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
int __user *arg)
{
struct ide_atapi_pc pc;
ide_drive_t *drive = floppy->drive;
int blocks, length, flags, err = 0;
if (floppy->openers > 1) {
/* Don't format if someone is using the disk */
drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
return -EBUSY;
}
drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
/*
* Send ATAPI_FORMAT_UNIT to the drive.
*
* Userland gives us the following structure:
*
* struct idefloppy_format_command {
* int nblocks;
* int blocksize;
* int flags;
* } ;
*
* flags is a bitmask, currently, the only defined flag is:
*
* 0x01 - verify media after format.
*/
if (get_user(blocks, arg) ||
get_user(length, arg+1) ||
get_user(flags, arg+2)) {
err = -EFAULT;
goto out;
}
(void) idefloppy_get_sfrp_bit(drive);
idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
if (idefloppy_queue_pc_tail(drive, &pc))
err = -EIO;
out:
if (err)
drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
return err;
}
static int idefloppy_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct block_device *bdev = inode->i_bdev;
struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
ide_drive_t *drive = floppy->drive;
struct ide_atapi_pc pc;
void __user *argp = (void __user *)arg;
int err;
switch (cmd) {
case CDROMEJECT:
/* fall through */
case CDROM_LOCKDOOR:
return ide_floppy_lockdoor(drive, &pc, arg, cmd);
case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
return 0;
case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
return ide_floppy_get_format_capacities(drive, argp);
case IDEFLOPPY_IOCTL_FORMAT_START:
if (!(file->f_mode & 2))
return -EPERM;
return ide_floppy_format_unit(floppy, (int __user *)arg);
case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
return idefloppy_get_format_progress(drive, argp);
}
/*
* skip SCSI_IOCTL_SEND_COMMAND (deprecated)
* and CDROM_SEND_PACKET (legacy) ioctls
*/
if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
bdev->bd_disk, cmd, argp);
else
err = -ENOTTY;
if (err == -ENOTTY)
err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
return err;
}
static int idefloppy_media_changed(struct gendisk *disk)
{
struct ide_floppy_obj *floppy = ide_floppy_g(disk);
ide_drive_t *drive = floppy->drive;
int ret;
/* do not scan partitions twice if this is a removable device */
if (drive->attach) {
drive->attach = 0;
return 0;
}
ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
return ret;
}
static int idefloppy_revalidate_disk(struct gendisk *disk)
{
struct ide_floppy_obj *floppy = ide_floppy_g(disk);
set_capacity(disk, idefloppy_capacity(floppy->drive));
return 0;
}
static struct block_device_operations idefloppy_ops = {
.owner = THIS_MODULE,
.open = idefloppy_open,
.release = idefloppy_release,
.ioctl = idefloppy_ioctl,
.getgeo = idefloppy_getgeo,
.media_changed = idefloppy_media_changed,
.revalidate_disk = idefloppy_revalidate_disk
};
static int ide_floppy_probe(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy;
struct gendisk *g;
if (!strstr("ide-floppy", drive->driver_req))
goto failed;
if (!drive->present)
goto failed;
if (drive->media != ide_floppy)
goto failed;
if (!idefloppy_identify_device(drive, drive->id)) {
printk(KERN_ERR "ide-floppy: %s: not supported by this version"
" of ide-floppy\n", drive->name);
goto failed;
}
floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
if (!floppy) {
printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
" structure\n", drive->name);
goto failed;
}
g = alloc_disk(1 << PARTN_BITS);
if (!g)
goto out_free_floppy;
ide_init_disk(g, drive);
ide_proc_register_driver(drive, &idefloppy_driver);
kref_init(&floppy->kref);
floppy->drive = drive;
floppy->driver = &idefloppy_driver;
floppy->disk = g;
g->private_data = &floppy->driver;
drive->driver_data = floppy;
idefloppy_setup(drive, floppy);
g->minors = 1 << PARTN_BITS;
g->driverfs_dev = &drive->gendev;
g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
g->fops = &idefloppy_ops;
drive->attach = 1;
add_disk(g);
return 0;
out_free_floppy:
kfree(floppy);
failed:
return -ENODEV;
}
static void __exit idefloppy_exit(void)
{
driver_unregister(&idefloppy_driver.gen_driver);
}
static int __init idefloppy_init(void)
{
printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
return driver_register(&idefloppy_driver.gen_driver);
}
MODULE_ALIAS("ide:*m-floppy*");
module_init(idefloppy_init);
module_exit(idefloppy_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
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