linux/drivers/ide/ide-floppy.c

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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
*/
/*
* The driver currently doesn't have any fancy features, just the bare
* minimum read/write support.
*
* 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 "0.99.newide"
#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>
/*
* The following are used to debug the driver.
*/
#define IDEFLOPPY_DEBUG_LOG 0
#define IDEFLOPPY_DEBUG_INFO 0
#define IDEFLOPPY_DEBUG_BUGS 1
/* #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)
/*
* Our view of a packet command.
*/
typedef struct idefloppy_packet_command_s {
u8 c[12]; /* Actual packet bytes */
int retries; /* On each retry, we increment retries */
int error; /* Error code */
int request_transfer; /* Bytes to transfer */
int actually_transferred; /* Bytes actually transferred */
int buffer_size; /* Size of our data buffer */
int b_count; /* Missing/Available data on the current buffer */
struct request *rq; /* The corresponding request */
u8 *buffer; /* Data buffer */
u8 *current_position; /* Pointer into the above buffer */
void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
unsigned long flags; /* Status/Action bit flags: long for set_bit */
} idefloppy_pc_t;
/*
* Packet command flag bits.
*/
#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */
#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
#define PC_WRITING 5 /* Data direction */
#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
/* 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 */
idefloppy_pc_t *pc;
/* Last failed packet command */
idefloppy_pc_t *failed_pc;
/* Packet command stack */
idefloppy_pc_t 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;
/* Status/Action flags */
unsigned long flags;
} idefloppy_floppy_t;
#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
/*
* Floppy flag bits values.
*/
#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */
#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
/*
* 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 codes which are returned in rq->errors to the higher part
* of the driver.
*/
#define IDEFLOPPY_ERROR_GENERAL 101
/*
* The following is used to format the general configuration word of
* the ATAPI IDENTIFY DEVICE command.
*/
struct idefloppy_id_gcw {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned packet_size :2; /* Packet Size */
unsigned reserved234 :3; /* Reserved */
unsigned drq_type :2; /* Command packet DRQ type */
unsigned removable :1; /* Removable media */
unsigned device_type :5; /* Device type */
unsigned reserved13 :1; /* Reserved */
unsigned protocol :2; /* Protocol type */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned protocol :2; /* Protocol type */
unsigned reserved13 :1; /* Reserved */
unsigned device_type :5; /* Device type */
unsigned removable :1; /* Removable media */
unsigned drq_type :2; /* Command packet DRQ type */
unsigned reserved234 :3; /* Reserved */
unsigned packet_size :2; /* Packet Size */
#else
#error "Bitfield endianness not defined! Check your byteorder.h"
#endif
};
/*
* 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 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);
mutex_unlock(&idefloppy_ref_mutex);
return floppy;
}
static void idefloppy_cleanup_obj(struct kref *);
static void ide_floppy_put(struct ide_floppy_obj *floppy)
{
mutex_lock(&idefloppy_ref_mutex);
kref_put(&floppy->kref, idefloppy_cleanup_obj);
mutex_unlock(&idefloppy_ref_mutex);
}
/*
* Too bad. The drive wants to send us data which we are not ready to accept.
* Just throw it away.
*/
static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
(void) HWIF(drive)->INB(IDE_DATA_REG);
}
#if IDEFLOPPY_DEBUG_BUGS
static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
{
while (bcount--)
HWIF(drive)->OUTB(0, IDE_DATA_REG);
}
#endif /* IDEFLOPPY_DEBUG_BUGS */
/*
* idefloppy_do_end_request is 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_do_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 idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
{
struct request *rq = pc->rq;
struct bio_vec *bvec;
struct req_iterator iter;
unsigned long flags;
char *data;
int count, done = 0;
rq_for_each_segment(bvec, rq, iter) {
if (!bcount)
break;
count = min(bvec->bv_len, bcount);
data = bvec_kmap_irq(bvec, &flags);
drive->hwif->atapi_input_bytes(drive, data, count);
bvec_kunmap_irq(data, &flags);
bcount -= count;
pc->b_count += count;
done += count;
}
idefloppy_do_end_request(drive, 1, done >> 9);
if (bcount) {
printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
idefloppy_discard_data(drive, bcount);
}
}
static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
{
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);
drive->hwif->atapi_output_bytes(drive, data, count);
bvec_kunmap_irq(data, &flags);
bcount -= count;
pc->b_count += count;
done += count;
}
idefloppy_do_end_request(drive, 1, done >> 9);
#if IDEFLOPPY_DEBUG_BUGS
if (bcount) {
printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
idefloppy_write_zeros(drive, bcount);
}
#endif
}
static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
{
struct request *rq = pc->rq;
struct bio *bio = rq->bio;
while ((bio = rq->bio) != NULL)
idefloppy_do_end_request(drive, 1, 0);
}
/*
* idefloppy_queue_pc_head generates 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,idefloppy_pc_t *pc,struct request *rq)
{
struct ide_floppy_obj *floppy = drive->driver_data;
ide_init_drive_cmd(rq);
rq->buffer = (char *) pc;
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->rq_disk = floppy->disk;
(void) ide_do_drive_cmd(drive, rq, ide_preempt);
}
static idefloppy_pc_t *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 idefloppy_request_sense_callback(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
u8 *buf = floppy->pc->buffer;
debug_log("Reached %s\n", __func__);
if (!floppy->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, sense key = %x, asc = %x,"
" ascq = %x\n",
floppy->failed_pc->c[0],
floppy->sense_key,
floppy->asc,
floppy->ascq);
else
debug_log("sense key = %x, asc = %x, ascq = %x\n",
floppy->sense_key,
floppy->asc,
floppy->ascq);
idefloppy_do_end_request(drive, 1, 0);
} else {
printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
" request!\n");
idefloppy_do_end_request(drive, 0, 0);
}
}
/*
* General packet command callback function.
*/
static void idefloppy_pc_callback (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
debug_log("Reached %s\n", __func__);
idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
}
/*
* idefloppy_init_pc initializes a packet command.
*/
static void idefloppy_init_pc (idefloppy_pc_t *pc)
{
memset(pc->c, 0, 12);
pc->retries = 0;
pc->flags = 0;
pc->request_transfer = 0;
pc->buffer = pc->pc_buffer;
pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
pc->callback = &idefloppy_pc_callback;
}
static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_REQUEST_SENSE;
pc->c[4] = 255;
pc->request_transfer = 18;
pc->callback = &idefloppy_request_sense_callback;
}
/*
* idefloppy_retry_pc is 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)
{
idefloppy_pc_t *pc;
struct request *rq;
(void)drive->hwif->INB(IDE_ERROR_REG);
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);
}
/*
* idefloppy_pc_intr is the usual interrupt handler which will be called
* during a packet command.
*/
static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
ide_hwif_t *hwif = drive->hwif;
idefloppy_pc_t *pc = floppy->pc;
struct request *rq = pc->rq;
unsigned int temp;
int dma_error = 0;
u16 bcount;
u8 stat, ireason;
debug_log("Reached %s interrupt handler\n", __func__);
if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
dma_error = hwif->ide_dma_end(drive);
if (dma_error) {
printk(KERN_ERR "%s: DMA %s error\n", drive->name,
rq_data_dir(rq) ? "write" : "read");
set_bit(PC_DMA_ERROR, &pc->flags);
} else {
pc->actually_transferred = pc->request_transfer;
idefloppy_update_buffers(drive, pc);
}
debug_log("DMA finished\n");
}
/* Clear the interrupt */
stat = drive->hwif->INB(IDE_STATUS_REG);
if ((stat & DRQ_STAT) == 0) { /* No more interrupts */
debug_log("Packet command completed, %d bytes transferred\n",
pc->actually_transferred);
clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
local_irq_enable_in_hardirq();
if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
/* Error detected */
debug_log("%s: I/O error\n", drive->name);
rq->errors++;
if (pc->c[0] == GPCMD_REQUEST_SENSE) {
printk(KERN_ERR "ide-floppy: I/O error in "
"request sense command\n");
return ide_do_reset(drive);
}
/* Retry operation */
idefloppy_retry_pc(drive);
/* queued, but not started */
return ide_stopped;
}
pc->error = 0;
if (floppy->failed_pc == pc)
floppy->failed_pc = NULL;
/* Command finished - Call the callback function */
pc->callback(drive);
return ide_stopped;
}
if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
printk(KERN_ERR "ide-floppy: The floppy wants to issue "
"more interrupts in DMA mode\n");
ide_dma_off(drive);
return ide_do_reset(drive);
}
/* Get the number of bytes to transfer */
bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
hwif->INB(IDE_BCOUNTL_REG);
/* on this interrupt */
ireason = hwif->INB(IDE_IREASON_REG);
if (ireason & CD) {
printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
return ide_do_reset(drive);
}
if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
/* Hopefully, we will never get here */
printk(KERN_ERR "ide-floppy: We wanted to %s, ",
(ireason & IO) ? "Write" : "Read");
printk(KERN_ERR "but the floppy wants us to %s !\n",
(ireason & IO) ? "Read" : "Write");
return ide_do_reset(drive);
}
if (!test_bit(PC_WRITING, &pc->flags)) {
/* Reading - Check that we have enough space */
temp = pc->actually_transferred + bcount;
if (temp > pc->request_transfer) {
if (temp > pc->buffer_size) {
printk(KERN_ERR "ide-floppy: The floppy wants "
"to send us more data than expected "
"- discarding data\n");
idefloppy_discard_data(drive, bcount);
ide_set_handler(drive,
&idefloppy_pc_intr,
IDEFLOPPY_WAIT_CMD,
NULL);
return ide_started;
}
debug_log("The floppy wants to send us more data than"
" expected - allowing transfer\n");
}
}
if (test_bit(PC_WRITING, &pc->flags)) {
if (pc->buffer != NULL)
/* Write the current buffer */
hwif->atapi_output_bytes(drive, pc->current_position,
bcount);
else
idefloppy_output_buffers(drive, pc, bcount);
} else {
if (pc->buffer != NULL)
/* Read the current buffer */
hwif->atapi_input_bytes(drive, pc->current_position,
bcount);
else
idefloppy_input_buffers(drive, pc, bcount);
}
/* Update the current position */
pc->actually_transferred += bcount;
pc->current_position += bcount;
ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */
return ide_started;
}
/*
* This is the original routine that did the packet transfer.
* It fails at high speeds on the Iomega ZIP drive, so there's a slower version
* for that drive below. The algorithm is chosen based on drive type
*/
static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
{
ide_startstop_t startstop;
idefloppy_floppy_t *floppy = drive->driver_data;
u8 ireason;
if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
printk(KERN_ERR "ide-floppy: Strange, packet command "
"initiated yet DRQ isn't asserted\n");
return startstop;
}
ireason = drive->hwif->INB(IDE_IREASON_REG);
if ((ireason & CD) == 0 || (ireason & IO)) {
printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
"issuing a packet command\n");
return ide_do_reset(drive);
}
/* Set the interrupt routine */
ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
/* Send the actual packet */
HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
return ide_started;
}
/*
* 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 it's ready to receive a packet. However,
* we need to delay about 2-3 ticks before issuing the packet or we
* gets in trouble.
*
* So, follow carefully. transfer_pc1 is called as an interrupt (or
* directly). In either case, when the device says it's ready for a
* packet, we schedule the packet transfer to occur about 2-3 ticks
* later in transfer_pc2.
*/
static int idefloppy_transfer_pc2 (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
/* Send the actual packet */
HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
/* Timeout for the packet command */
return IDEFLOPPY_WAIT_CMD;
}
static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
ide_startstop_t startstop;
u8 ireason;
if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
printk(KERN_ERR "ide-floppy: Strange, packet command "
"initiated yet DRQ isn't asserted\n");
return startstop;
}
ireason = drive->hwif->INB(IDE_IREASON_REG);
if ((ireason & CD) == 0 || (ireason & IO)) {
printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
"while issuing a packet command\n");
return ide_do_reset(drive);
}
/*
* 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.
*/
ide_set_handler(drive,
&idefloppy_pc_intr, /* service routine for packet command */
floppy->ticks, /* wait this long before "failing" */
&idefloppy_transfer_pc2); /* fail == transfer_pc2 */
return ide_started;
}
/**
* idefloppy_should_report_error()
*
* Supresses error messages resulting from Medium not present
*/
static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
{
if (floppy->sense_key == 0x02 &&
floppy->asc == 0x3a &&
floppy->ascq == 0x00)
return 0;
return 1;
}
/*
* Issue a packet command
*/
static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
{
idefloppy_floppy_t *floppy = drive->driver_data;
ide_hwif_t *hwif = drive->hwif;
ide_handler_t *pkt_xfer_routine;
u16 bcount;
u8 dma;
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 ||
test_bit(PC_ABORT, &pc->flags)) {
/*
* We will "abort" retrying a packet command in case
* a legitimate error code was received.
*/
if (!test_bit(PC_ABORT, &pc->flags)) {
if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
if (idefloppy_should_report_error(floppy))
printk(KERN_ERR "ide-floppy: %s: I/O error, "
"pc = %2x, key = %2x, "
"asc = %2x, ascq = %2x\n",
drive->name, pc->c[0],
floppy->sense_key,
floppy->asc, floppy->ascq);
}
/* Giving up */
pc->error = IDEFLOPPY_ERROR_GENERAL;
}
floppy->failed_pc = NULL;
pc->callback(drive);
return ide_stopped;
}
debug_log("Retry number - %d\n", pc->retries);
pc->retries++;
/* We haven't transferred any data yet */
pc->actually_transferred = 0;
pc->current_position = pc->buffer;
bcount = min(pc->request_transfer, 63 * 1024);
if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
ide_dma_off(drive);
dma = 0;
if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
dma = !hwif->dma_setup(drive);
ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
IDE_TFLAG_OUT_DEVICE, bcount, dma);
if (dma) { /* Begin DMA, if necessary */
set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
hwif->dma_start(drive);
}
/* Can we transfer the packet when we get the interrupt or wait? */
if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
/* wait */
pkt_xfer_routine = &idefloppy_transfer_pc1;
} else {
/* immediate */
pkt_xfer_routine = &idefloppy_transfer_pc;
}
if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
/* Issue the packet command */
ide_execute_command(drive, WIN_PACKETCMD,
pkt_xfer_routine,
IDEFLOPPY_WAIT_CMD,
NULL);
return ide_started;
} else {
/* Issue the packet command */
HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
return (*pkt_xfer_routine) (drive);
}
}
static void idefloppy_rw_callback (ide_drive_t *drive)
{
debug_log("Reached %s\n", __func__);
idefloppy_do_end_request(drive, 1, 0);
return;
}
static void idefloppy_create_prevent_cmd (idefloppy_pc_t *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 (idefloppy_pc_t *pc)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
pc->c[7] = 255;
pc->c[8] = 255;
pc->request_transfer = 255;
}
static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
int flags)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_FORMAT_UNIT;
pc->c[1] = 0x17;
memset(pc->buffer, 0, 12);
pc->buffer[1] = 0xA2;
/* Default format list header, u8 1: FOV/DCRT/IMM bits set */
if (flags & 1) /* Verify bit on... */
pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
pc->buffer[3] = 8;
put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
pc->buffer_size=12;
set_bit(PC_WRITING, &pc->flags);
}
/*
* A mode sense command is used to "sense" floppy parameters.
*/
static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *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->request_transfer = length;
}
static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_START_STOP_UNIT;
pc->c[4] = start;
}
static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
{
idefloppy_init_pc(pc);
pc->c[0] = GPCMD_TEST_UNIT_READY;
}
static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *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_rw1%d_cmd: block == %d, blocks == %d\n",
2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
block, blocks);
idefloppy_init_pc(pc);
if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
pc->c[0] = cmd == READ ? GPCMD_READ_12 : GPCMD_WRITE_12;
put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]);
} else {
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]);
pc->callback = &idefloppy_rw_callback;
pc->rq = rq;
pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
if (rq->cmd_flags & REQ_RW)
set_bit(PC_WRITING, &pc->flags);
pc->buffer = NULL;
pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
set_bit(PC_DMA_RECOMMENDED, &pc->flags);
}
static void
idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
{
idefloppy_init_pc(pc);
pc->callback = &idefloppy_rw_callback;
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)
set_bit(PC_WRITING, &pc->flags);
pc->buffer = rq->data;
if (rq->bio)
set_bit(PC_DMA_RECOMMENDED, &pc->flags);
/*
* possibly problematic, doesn't look like ide-floppy correctly
* handled scattered requests if dma fails...
*/
pc->request_transfer = pc->buffer_size = rq->data_len;
}
/*
* idefloppy_do_request is our request handling function.
*/
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;
idefloppy_pc_t *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 != NULL) {
if (idefloppy_should_report_error(floppy))
printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
" key = %2x, asc = %2x, ascq = %2x\n",
drive->name, floppy->failed_pc->c[0],
floppy->sense_key, floppy->asc, floppy->ascq);
}
else
printk(KERN_ERR "ide-floppy: %s: I/O error\n",
drive->name);
idefloppy_do_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("%s: unsupported r/w request size\n",
drive->name);
idefloppy_do_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 = (idefloppy_pc_t *) 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_do_end_request(drive, 0, 0);
return ide_stopped;
}
pc->rq = rq;
return idefloppy_issue_pc(drive, pc);
}
/*
* idefloppy_queue_pc_tail adds a special packet command request to the
* tail of the request queue, and waits for it to be serviced.
*/
static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
{
struct ide_floppy_obj *floppy = drive->driver_data;
struct request rq;
ide_init_drive_cmd (&rq);
rq.buffer = (char *) pc;
rq.cmd_type = REQ_TYPE_SPECIAL;
rq.rq_disk = floppy->disk;
return ide_do_drive_cmd(drive, &rq, ide_wait);
}
/*
* 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;
idefloppy_pc_t 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.buffer[3] & 0x80);
set_disk_ro(floppy->disk, floppy->wp);
page = &pc.buffer[8];
transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
sector_size = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
cyls = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
rpm = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
heads = pc.buffer[8 + 4];
sectors = pc.buffer[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;
idefloppy_pc_t pc;
floppy->srfp = 0;
idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
MODE_SENSE_CURRENT);
set_bit(PC_SUPPRESS_ERROR, &pc.flags);
if (idefloppy_queue_pc_tail(drive, &pc))
return 1;
floppy->srfp = pc.buffer[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;
idefloppy_pc_t 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.buffer[3];
cap_desc = &pc.buffer[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_cpu(*(u32 *)&pc.buffer[desc_start]);
length = be16_to_cpu(*(u16 *)&pc.buffer[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.buffer[desc_start + 4] & 0x03) {
/* Clik! drive returns this instead of CAPACITY_CURRENT */
case CAPACITY_UNFORMATTED:
if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
/*
* 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.buffer[desc_start + 4] & 0x03);
}
/* Clik! disk does not support get_flexible_disk_page */
if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
(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)
{
idefloppy_pc_t 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.buffer[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_cpu(*(u32 *)&pc.buffer[desc_start]);
length = be16_to_cpu(*(u16 *)&pc.buffer[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;
idefloppy_pc_t 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 {
unsigned long flags;
u8 stat;
local_irq_save(flags);
stat = drive->hwif->INB(IDE_STATUS_REG);
local_irq_restore(flags);
progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
}
if (put_user(progress_indication, arg))
return (-EFAULT);
return (0);
}
/*
* Return the current floppy capacity.
*/
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;
}
/*
* idefloppy_identify_device checks if 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)
{
struct idefloppy_id_gcw gcw;
#if IDEFLOPPY_DEBUG_INFO
char buffer[80];
#endif /* IDEFLOPPY_DEBUG_INFO */
*((u16 *) &gcw) = id->config;
#ifdef CONFIG_PPC
/* kludge for Apple PowerBook internal zip */
if ((gcw.device_type == 5) &&
!strstr(id->model, "CD-ROM") &&
strstr(id->model, "ZIP"))
gcw.device_type = 0;
#endif
#if IDEFLOPPY_DEBUG_INFO
printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
switch (gcw.protocol) {
case 0: case 1: sprintf(buffer, "ATA");break;
case 2: sprintf(buffer, "ATAPI");break;
case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
}
printk(KERN_INFO "Protocol Type: %s\n", buffer);
switch (gcw.device_type) {
case 0: sprintf(buffer, "Direct-access Device");break;
case 1: sprintf(buffer, "Streaming Tape Device");break;
case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
case 5: sprintf(buffer, "CD-ROM Device");break;
case 6: sprintf(buffer, "Reserved");
case 7: sprintf(buffer, "Optical memory Device");break;
case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
default: sprintf(buffer, "Reserved");
}
printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");
switch (gcw.drq_type) {
case 0: sprintf(buffer, "Microprocessor DRQ");break;
case 1: sprintf(buffer, "Interrupt DRQ");break;
case 2: sprintf(buffer, "Accelerated DRQ");break;
case 3: sprintf(buffer, "Reserved");break;
}
printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
switch (gcw.packet_size) {
case 0: sprintf(buffer, "12 bytes");break;
case 1: sprintf(buffer, "16 bytes");break;
default: sprintf(buffer, "Reserved");break;
}
printk(KERN_INFO "Command Packet Size: %s\n", buffer);
#endif /* IDEFLOPPY_DEBUG_INFO */
if (gcw.protocol != 2)
printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
else if (gcw.device_type != 0)
printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
else if (!gcw.removable)
printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
else if (gcw.drq_type == 3) {
printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
} else if (gcw.packet_size != 0) {
printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
} 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;
/*
* drive setting name read/write data type min max mul_factor div_factor data pointer set function
*/
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
/*
* Driver initialization.
*/
static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
{
struct idefloppy_id_gcw gcw;
*((u16 *) &gcw) = drive->id->config;
floppy->pc = floppy->pc_stack;
if (gcw.drq_type == 1)
set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
/*
* 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)) {
set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
/* 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);
set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
}
(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_do_end_request,
.error = __ide_error,
.abort = __ide_abort,
#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;
idefloppy_pc_t pc;
int ret = 0;
debug_log("Reached %s\n", __func__);
if (!(floppy = ide_floppy_get(disk)))
return -ENXIO;
drive = floppy->drive;
floppy->openers++;
if (floppy->openers == 1) {
clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
/* Just in case */
idefloppy_create_test_unit_ready_cmd(&pc);
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;
}
set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
/* IOMEGA Clik! drives do not support lock/unlock commands */
if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
idefloppy_create_prevent_cmd(&pc, 1);
(void) idefloppy_queue_pc_tail(drive, &pc);
}
check_disk_change(inode->i_bdev);
} else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
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;
idefloppy_pc_t pc;
debug_log("Reached %s\n", __func__);
if (floppy->openers == 1) {
/* IOMEGA Clik! drives do not support lock/unlock commands */
if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
idefloppy_create_prevent_cmd(&pc, 0);
(void) idefloppy_queue_pc_tail(drive, &pc);
}
clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
}
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(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
unsigned long arg, unsigned int cmd)
{
if (floppy->openers > 1)
return -EBUSY;
/* The IOMEGA Clik! Drive doesn't support this command -
* no room for an eject mechanism */
if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
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)
{
int blocks, length, flags, err = 0;
idefloppy_pc_t pc;
if (floppy->openers > 1) {
/* Don't format if someone is using the disk */
clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
return -EBUSY;
}
set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
/*
* 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(floppy->drive);
idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
if (idefloppy_queue_pc_tail(floppy->drive, &pc))
err = -EIO;
out:
if (err)
clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
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;
idefloppy_pc_t pc;
void __user *argp = (void __user *)arg;
int err;
switch (cmd) {
case CDROMEJECT:
/* fall through */
case CDROM_LOCKDOOR:
return ide_floppy_lockdoor(floppy, &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;
/* do not scan partitions twice if this is a removable device */
if (drive->attach) {
drive->attach = 0;
return 0;
}
return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
}
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;
}
if (drive->scsi) {
printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
goto failed;
}
[PATCH] getting rid of all casts of k[cmz]alloc() calls Run this: #!/bin/sh for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do echo "De-casting $f..." perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f done And then go through and reinstate those cases where code is casting pointers to non-pointers. And then drop a few hunks which conflicted with outstanding work. Cc: Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Greg KH <greg@kroah.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Karsten Keil <kkeil@suse.de> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Ian Kent <raven@themaw.net> Cc: Steven French <sfrench@us.ibm.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-13 08:35:56 +00:00
if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
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;
}
MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
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);
}
[PATCH] ide: MODALIAS support for autoloading of ide-cd, ide-disk, ... IDE: MODALIAS support for autoloading of ide-cd, ide-disk, ... Add MODULE_ALIAS to IDE midlayer modules: ide-disk, ide-cd, ide-floppy and ide-tape, to autoload these modules depending on the probed media type of the IDE device. It is used by udev and replaces the former agent shell script of the hotplug package, which was required to lookup the media type in the proc filesystem. Using proc was racy, cause the media file is created after the hotplug event is sent out. The module autoloading does not take any effect, until something like the following udev rule is configured: SUBSYSTEM=="ide", ACTION=="add", ENV{MODALIAS}=="?*", RUN+="/sbin/modprobe $env{MODALIAS}" The module ide-scsi will not be autoloaded, cause it requires manual configuration. It can't be, and never was supported for automatic setup in the hotplug package. Adding a MODULE_ALIAS to ide-scsi for all supported media types, would just lead to a default blacklist entry anyway. $ modinfo ide-disk filename: /lib/modules/2.6.15-rc4-g1b0997f5/kernel/drivers/ide/ide-disk.ko description: ATA DISK Driver alias: ide:*m-disk* license: GPL ... $ modprobe -vn ide:m-disk insmod /lib/modules/2.6.15-rc4-g1b0997f5/kernel/drivers/ide/ide-disk.ko $ cat /sys/bus/ide/devices/0.0/modalias ide:m-disk It also adds attributes to the IDE device: $ tree /sys/bus/ide/devices/0.0/ /sys/bus/ide/devices/0.0/ |-- bus -> ../../../../../../../bus/ide |-- drivename |-- media |-- modalias |-- power | |-- state | `-- wakeup `-- uevent $ cat /sys/bus/ide/devices/0.0/{modalias,drivename,media} ide:m-disk hda disk Signed-off-by: Kay Sievers <kay.sievers@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-12-12 17:03:44 +00:00
MODULE_ALIAS("ide:*m-floppy*");
module_init(idefloppy_init);
module_exit(idefloppy_exit);
MODULE_LICENSE("GPL");