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ide: make ide_transfer_pc() static

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* Move ->ticks field from struct ide_floppy_obj to ide_drive_t.

* Move idefloppy_transfer_pc() to ide-atapi.c and make
  ide_transfer_pc() use it.

* Always use ide_transfer_pc as a handler in ide_issue_pc().

* Remove no longer used idefloppy_start_pc_transfer(),
  ide*_transfer_pc() and 'handler' argument from ide_issue_pc().

* Make ide_transfer_pc() static.

While at it:

* idefloppy_transfer_pc() -> ide_delayed_transfer_pc()

* IDEFLOPPY_TICKS_DELAY -> IDEFLOPPY_PC_DELAY

* ->ticks -> ->pc_delay

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-10-13 21:39:32 +02:00
parent aa5d2de7b0
commit baf08f0be6
6 changed files with 49 additions and 89 deletions
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41
drivers/ide/ide-atapi.c
View File

@ -468,12 +468,22 @@ static u8 ide_wait_ireason(ide_drive_t *drive, u8 ireason)
return ireason;
}
ide_startstop_t ide_transfer_pc(ide_drive_t *drive, unsigned int timeout,
ide_expiry_t *expiry)
static int ide_delayed_transfer_pc(ide_drive_t *drive)
{
/* Send the actual packet */
drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
/* Timeout for the packet command */
return WAIT_FLOPPY_CMD;
}
static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
{
struct ide_atapi_pc *pc = drive->pc;
ide_hwif_t *hwif = drive->hwif;
struct request *rq = hwif->hwgroup->rq;
ide_expiry_t *expiry;
unsigned int timeout;
ide_startstop_t startstop;
u8 ireason;
@ -493,6 +503,25 @@ ide_startstop_t ide_transfer_pc(ide_drive_t *drive, unsigned int timeout,
return ide_do_reset(drive);
}
/*
* If necessary schedule the packet transfer to occur 'timeout'
* miliseconds later in ide_delayed_transfer_pc() after the device
* says it's ready for a packet.
*/
if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
timeout = drive->pc_delay;
expiry = &ide_delayed_transfer_pc;
} else {
if (drive->scsi) {
timeout = ide_scsi_get_timeout(pc);
expiry = ide_scsi_expiry;
} else {
timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
: WAIT_TAPE_CMD;
expiry = NULL;
}
}
/* Set the interrupt routine */
ide_set_handler(drive, ide_pc_intr, timeout, expiry);
@ -508,10 +537,8 @@ ide_startstop_t ide_transfer_pc(ide_drive_t *drive, unsigned int timeout,
return ide_started;
}
EXPORT_SYMBOL_GPL(ide_transfer_pc);
ide_startstop_t ide_issue_pc(ide_drive_t *drive,
ide_handler_t *handler, unsigned int timeout,
ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
ide_expiry_t *expiry)
{
struct ide_atapi_pc *pc = drive->pc;
@ -550,12 +577,12 @@ ide_startstop_t ide_issue_pc(ide_drive_t *drive,
/* Issue the packet command */
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
ide_execute_command(drive, ATA_CMD_PACKET, handler,
ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc,
timeout, NULL);
return ide_started;
} else {
ide_execute_pkt_cmd(drive);
return (*handler)(drive);
return ide_transfer_pc(drive);
}
}
EXPORT_SYMBOL_GPL(ide_issue_pc);

72
drivers/ide/ide-floppy.c
View File

@ -73,7 +73,11 @@
#define CAPACITY_CURRENT 0x02
#define CAPACITY_NO_CARTRIDGE 0x03
#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
/*
* 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) */
/* Error code returned in rq->errors to the higher part of the driver. */
#define IDEFLOPPY_ERROR_GENERAL 101
@ -193,51 +197,6 @@ static void ide_floppy_callback(ide_drive_t *drive, int dsc)
idefloppy_end_request(drive, uptodate, 0);
}
/*
* 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)
{
/* Send the actual packet */
drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
/* Timeout for the packet command */
return WAIT_FLOPPY_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;
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. ide_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 = WAIT_FLOPPY_CMD;
expiry = NULL;
}
return ide_transfer_pc(drive, timeout, expiry);
}
static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
struct ide_atapi_pc *pc)
{
@ -281,8 +240,7 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
pc->retries++;
return ide_issue_pc(drive, idefloppy_start_pc_transfer,
WAIT_FLOPPY_CMD, NULL);
return ide_issue_pc(drive, WAIT_FLOPPY_CMD, NULL);
}
void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
@ -597,21 +555,7 @@ static sector_t idefloppy_capacity(ide_drive_t *drive)
ide_devset_rw_field(bios_cyl, bios_cyl);
ide_devset_rw_field(bios_head, bios_head);
ide_devset_rw_field(bios_sect, bios_sect);
static int get_ticks(ide_drive_t *drive)
{
idefloppy_floppy_t *floppy = drive->driver_data;
return floppy->ticks;
}
static int set_ticks(ide_drive_t *drive, int arg)
{
idefloppy_floppy_t *floppy = drive->driver_data;
floppy->ticks = arg;
return 0;
}
IDE_DEVSET(ticks, DS_SYNC, get_ticks, set_ticks);
ide_devset_rw_field(ticks, pc_delay);
static const struct ide_proc_devset idefloppy_settings[] = {
IDE_PROC_DEVSET(bios_cyl, 0, 1023),
@ -647,7 +591,7 @@ static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
if (!strncmp((char *)&id[ATA_ID_PROD], "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;
drive->pc_delay = IDEFLOPPY_PC_DELAY;
blk_queue_max_sectors(drive->queue, 64);
}

3
drivers/ide/ide-floppy.h
View File

@ -20,8 +20,7 @@ typedef struct ide_floppy_obj {
/* Last error information */
u8 sense_key, asc, ascq;
/* delay this long before sending packet command */
u8 ticks;
int progress_indication;
/* Device information */

6
drivers/ide/ide-tape.c
View File

@ -654,10 +654,6 @@ static int ide_tape_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
* again, the callback function will be called and then we will handle the next
* request.
*/
static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
{
return ide_transfer_pc(drive, WAIT_TAPE_CMD, NULL);
}
static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
struct ide_atapi_pc *pc)
@ -705,7 +701,7 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
pc->retries++;
return ide_issue_pc(drive, idetape_transfer_pc, WAIT_TAPE_CMD, NULL);
return ide_issue_pc(drive, WAIT_TAPE_CMD, NULL);
}
/* A mode sense command is used to "sense" tape parameters. */

9
drivers/scsi/ide-scsi.c
View File

@ -270,12 +270,6 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
return 0;
}
static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
{
return ide_transfer_pc(drive, ide_scsi_get_timeout(drive->pc),
ide_scsi_expiry);
}
static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
{
switch (pc->c[0]) {
@ -321,8 +315,7 @@ static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
/* Set the current packet command */
drive->pc = pc;
return ide_issue_pc(drive, idescsi_transfer_pc,
ide_scsi_get_timeout(pc), ide_scsi_expiry);
return ide_issue_pc(drive, ide_scsi_get_timeout(pc), ide_scsi_expiry);
}
/*

7
include/linux/ide.h
View File

@ -531,6 +531,9 @@ struct ide_drive_s {
u8 bios_head; /* BIOS/fdisk/LILO number of heads */
u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
/* delay this long before sending packet command */
u8 pc_delay;
unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
unsigned int cyl; /* "real" number of cyls */
unsigned int drive_data; /* used by set_pio_mode/selectproc */
@ -1188,9 +1191,7 @@ static inline unsigned long ide_scsi_get_timeout(struct ide_atapi_pc *pc)
int ide_scsi_expiry(ide_drive_t *);
ide_startstop_t ide_transfer_pc(ide_drive_t *, unsigned int, ide_expiry_t *);
ide_startstop_t ide_issue_pc(ide_drive_t *,
ide_handler_t *, unsigned int, ide_expiry_t *);
ide_startstop_t ide_issue_pc(ide_drive_t *, unsigned int, ide_expiry_t *);
ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);