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path: root/drivers/ide/ide-iops.c
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Diffstat (limited to 'drivers/ide/ide-iops.c')
-rw-r--r--drivers/ide/ide-iops.c742
1 files changed, 29 insertions, 713 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index b1892bd95c6f..317c5dadd7c0 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -27,35 +27,7 @@
#include <asm/uaccess.h>
#include <asm/io.h>
-/*
- * Conventional PIO operations for ATA devices
- */
-
-static u8 ide_inb (unsigned long port)
-{
- return (u8) inb(port);
-}
-
-static void ide_outb (u8 val, unsigned long port)
-{
- outb(val, port);
-}
-
-/*
- * MMIO operations, typically used for SATA controllers
- */
-
-static u8 ide_mm_inb (unsigned long port)
-{
- return (u8) readb((void __iomem *) port);
-}
-
-static void ide_mm_outb (u8 value, unsigned long port)
-{
- writeb(value, (void __iomem *) port);
-}
-
-void SELECT_DRIVE (ide_drive_t *drive)
+void SELECT_DRIVE(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
const struct ide_port_ops *port_ops = hwif->port_ops;
@@ -78,277 +50,6 @@ void SELECT_MASK(ide_drive_t *drive, int mask)
port_ops->maskproc(drive, mask);
}
-void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
-{
- if (hwif->host_flags & IDE_HFLAG_MMIO)
- writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
- else
- outb(cmd, hwif->io_ports.command_addr);
-}
-EXPORT_SYMBOL_GPL(ide_exec_command);
-
-u8 ide_read_status(ide_hwif_t *hwif)
-{
- if (hwif->host_flags & IDE_HFLAG_MMIO)
- return readb((void __iomem *)hwif->io_ports.status_addr);
- else
- return inb(hwif->io_ports.status_addr);
-}
-EXPORT_SYMBOL_GPL(ide_read_status);
-
-u8 ide_read_altstatus(ide_hwif_t *hwif)
-{
- if (hwif->host_flags & IDE_HFLAG_MMIO)
- return readb((void __iomem *)hwif->io_ports.ctl_addr);
- else
- return inb(hwif->io_ports.ctl_addr);
-}
-EXPORT_SYMBOL_GPL(ide_read_altstatus);
-
-void ide_set_irq(ide_hwif_t *hwif, int on)
-{
- u8 ctl = ATA_DEVCTL_OBS;
-
- if (on == 4) { /* hack for SRST */
- ctl |= 4;
- on &= ~4;
- }
-
- ctl |= on ? 0 : 2;
-
- if (hwif->host_flags & IDE_HFLAG_MMIO)
- writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
- else
- outb(ctl, hwif->io_ports.ctl_addr);
-}
-EXPORT_SYMBOL_GPL(ide_set_irq);
-
-void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct ide_io_ports *io_ports = &hwif->io_ports;
- struct ide_taskfile *tf = &task->tf;
- void (*tf_outb)(u8 addr, unsigned long port);
- u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
- u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
-
- if (mmio)
- tf_outb = ide_mm_outb;
- else
- tf_outb = ide_outb;
-
- if (task->tf_flags & IDE_TFLAG_FLAGGED)
- HIHI = 0xFF;
-
- if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
- u16 data = (tf->hob_data << 8) | tf->data;
-
- if (mmio)
- writew(data, (void __iomem *)io_ports->data_addr);
- else
- outw(data, io_ports->data_addr);
- }
-
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
- tf_outb(tf->hob_feature, io_ports->feature_addr);
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
- tf_outb(tf->hob_nsect, io_ports->nsect_addr);
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
- tf_outb(tf->hob_lbal, io_ports->lbal_addr);
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
- tf_outb(tf->hob_lbam, io_ports->lbam_addr);
- if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
- tf_outb(tf->hob_lbah, io_ports->lbah_addr);
-
- if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
- tf_outb(tf->feature, io_ports->feature_addr);
- if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
- tf_outb(tf->nsect, io_ports->nsect_addr);
- if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
- tf_outb(tf->lbal, io_ports->lbal_addr);
- if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
- tf_outb(tf->lbam, io_ports->lbam_addr);
- if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
- tf_outb(tf->lbah, io_ports->lbah_addr);
-
- if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
- tf_outb((tf->device & HIHI) | drive->select,
- io_ports->device_addr);
-}
-EXPORT_SYMBOL_GPL(ide_tf_load);
-
-void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct ide_io_ports *io_ports = &hwif->io_ports;
- struct ide_taskfile *tf = &task->tf;
- void (*tf_outb)(u8 addr, unsigned long port);
- u8 (*tf_inb)(unsigned long port);
- u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
-
- if (mmio) {
- tf_outb = ide_mm_outb;
- tf_inb = ide_mm_inb;
- } else {
- tf_outb = ide_outb;
- tf_inb = ide_inb;
- }
-
- if (task->tf_flags & IDE_TFLAG_IN_DATA) {
- u16 data;
-
- if (mmio)
- data = readw((void __iomem *)io_ports->data_addr);
- else
- data = inw(io_ports->data_addr);
-
- tf->data = data & 0xff;
- tf->hob_data = (data >> 8) & 0xff;
- }
-
- /* be sure we're looking at the low order bits */
- tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
-
- if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
- tf->feature = tf_inb(io_ports->feature_addr);
- if (task->tf_flags & IDE_TFLAG_IN_NSECT)
- tf->nsect = tf_inb(io_ports->nsect_addr);
- if (task->tf_flags & IDE_TFLAG_IN_LBAL)
- tf->lbal = tf_inb(io_ports->lbal_addr);
- if (task->tf_flags & IDE_TFLAG_IN_LBAM)
- tf->lbam = tf_inb(io_ports->lbam_addr);
- if (task->tf_flags & IDE_TFLAG_IN_LBAH)
- tf->lbah = tf_inb(io_ports->lbah_addr);
- if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
- tf->device = tf_inb(io_ports->device_addr);
-
- if (task->tf_flags & IDE_TFLAG_LBA48) {
- tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
-
- if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
- tf->hob_feature = tf_inb(io_ports->feature_addr);
- if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
- tf->hob_nsect = tf_inb(io_ports->nsect_addr);
- if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
- tf->hob_lbal = tf_inb(io_ports->lbal_addr);
- if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
- tf->hob_lbam = tf_inb(io_ports->lbam_addr);
- if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
- tf->hob_lbah = tf_inb(io_ports->lbah_addr);
- }
-}
-EXPORT_SYMBOL_GPL(ide_tf_read);
-
-/*
- * Some localbus EIDE interfaces require a special access sequence
- * when using 32-bit I/O instructions to transfer data. We call this
- * the "vlb_sync" sequence, which consists of three successive reads
- * of the sector count register location, with interrupts disabled
- * to ensure that the reads all happen together.
- */
-static void ata_vlb_sync(unsigned long port)
-{
- (void)inb(port);
- (void)inb(port);
- (void)inb(port);
-}
-
-/*
- * This is used for most PIO data transfers *from* the IDE interface
- *
- * These routines will round up any request for an odd number of bytes,
- * so if an odd len is specified, be sure that there's at least one
- * extra byte allocated for the buffer.
- */
-void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf,
- unsigned int len)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct ide_io_ports *io_ports = &hwif->io_ports;
- unsigned long data_addr = io_ports->data_addr;
- u8 io_32bit = drive->io_32bit;
- u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
-
- len++;
-
- if (io_32bit) {
- unsigned long uninitialized_var(flags);
-
- if ((io_32bit & 2) && !mmio) {
- local_irq_save(flags);
- ata_vlb_sync(io_ports->nsect_addr);
- }
-
- if (mmio)
- __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
- else
- insl(data_addr, buf, len / 4);
-
- if ((io_32bit & 2) && !mmio)
- local_irq_restore(flags);
-
- if ((len & 3) >= 2) {
- if (mmio)
- __ide_mm_insw((void __iomem *)data_addr,
- (u8 *)buf + (len & ~3), 1);
- else
- insw(data_addr, (u8 *)buf + (len & ~3), 1);
- }
- } else {
- if (mmio)
- __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
- else
- insw(data_addr, buf, len / 2);
- }
-}
-EXPORT_SYMBOL_GPL(ide_input_data);
-
-/*
- * This is used for most PIO data transfers *to* the IDE interface
- */
-void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf,
- unsigned int len)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct ide_io_ports *io_ports = &hwif->io_ports;
- unsigned long data_addr = io_ports->data_addr;
- u8 io_32bit = drive->io_32bit;
- u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
-
- len++;
-
- if (io_32bit) {
- unsigned long uninitialized_var(flags);
-
- if ((io_32bit & 2) && !mmio) {
- local_irq_save(flags);
- ata_vlb_sync(io_ports->nsect_addr);
- }
-
- if (mmio)
- __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
- else
- outsl(data_addr, buf, len / 4);
-
- if ((io_32bit & 2) && !mmio)
- local_irq_restore(flags);
-
- if ((len & 3) >= 2) {
- if (mmio)
- __ide_mm_outsw((void __iomem *)data_addr,
- (u8 *)buf + (len & ~3), 1);
- else
- outsw(data_addr, (u8 *)buf + (len & ~3), 1);
- }
- } else {
- if (mmio)
- __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
- else
- outsw(data_addr, buf, len / 2);
- }
-}
-EXPORT_SYMBOL_GPL(ide_output_data);
-
u8 ide_read_error(ide_drive_t *drive)
{
ide_task_t task;
@@ -362,35 +63,6 @@ u8 ide_read_error(ide_drive_t *drive)
}
EXPORT_SYMBOL_GPL(ide_read_error);
-void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
-{
- ide_task_t task;
-
- memset(&task, 0, sizeof(task));
- task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
- IDE_TFLAG_IN_NSECT;
-
- drive->hwif->tp_ops->tf_read(drive, &task);
-
- *bcount = (task.tf.lbah << 8) | task.tf.lbam;
- *ireason = task.tf.nsect & 3;
-}
-EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
-
-const struct ide_tp_ops default_tp_ops = {
- .exec_command = ide_exec_command,
- .read_status = ide_read_status,
- .read_altstatus = ide_read_altstatus,
-
- .set_irq = ide_set_irq,
-
- .tf_load = ide_tf_load,
- .tf_read = ide_tf_read,
-
- .input_data = ide_input_data,
- .output_data = ide_output_data,
-};
-
void ide_fix_driveid(u16 *id)
{
#ifndef __LITTLE_ENDIAN
@@ -412,7 +84,7 @@ void ide_fix_driveid(u16 *id)
* returned by the ATA_CMD_ID_ATA[PI] commands.
*/
-void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
+void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
{
u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
@@ -435,44 +107,9 @@ void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
while (p != end)
*p++ = '\0';
}
-
EXPORT_SYMBOL(ide_fixstring);
/*
- * Needed for PCI irq sharing
- */
-int drive_is_ready (ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- u8 stat = 0;
-
- if (drive->waiting_for_dma)
- return hwif->dma_ops->dma_test_irq(drive);
-
- /*
- * We do a passive status test under shared PCI interrupts on
- * cards that truly share the ATA side interrupt, but may also share
- * an interrupt with another pci card/device. We make no assumptions
- * about possible isa-pnp and pci-pnp issues yet.
- */
- if (hwif->io_ports.ctl_addr &&
- (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0)
- stat = hwif->tp_ops->read_altstatus(hwif);
- else
- /* Note: this may clear a pending IRQ!! */
- stat = hwif->tp_ops->read_status(hwif);
-
- if (stat & ATA_BUSY)
- /* drive busy: definitely not interrupting */
- return 0;
-
- /* drive ready: *might* be interrupting */
- return 1;
-}
-
-EXPORT_SYMBOL(drive_is_ready);
-
-/*
* This routine busy-waits for the drive status to be not "busy".
* It then checks the status for all of the "good" bits and none
* of the "bad" bits, and if all is okay it returns 0. All other
@@ -483,7 +120,8 @@ EXPORT_SYMBOL(drive_is_ready);
* setting a timer to wake up at half second intervals thereafter,
* until timeout is achieved, before timing out.
*/
-static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
+static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
+ unsigned long timeout, u8 *rstat)
{
ide_hwif_t *hwif = drive->hwif;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
@@ -541,7 +179,8 @@ static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long ti
* The caller should return the updated value of "startstop" in this case,
* "startstop" is unchanged when the function returns 0.
*/
-int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
+int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
+ u8 bad, unsigned long timeout)
{
int err;
u8 stat;
@@ -561,7 +200,6 @@ int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 ba
return err;
}
-
EXPORT_SYMBOL(ide_wait_stat);
/**
@@ -582,7 +220,6 @@ int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
return 1;
return 0;
}
-
EXPORT_SYMBOL_GPL(ide_in_drive_list);
/*
@@ -607,7 +244,7 @@ static const struct drive_list_entry ivb_list[] = {
* All hosts that use the 80c ribbon must use!
* The name is derived from upper byte of word 93 and the 80c ribbon.
*/
-u8 eighty_ninty_three (ide_drive_t *drive)
+u8 eighty_ninty_three(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u16 *id = drive->id;
@@ -652,47 +289,19 @@ no_80w:
int ide_driveid_update(ide_drive_t *drive)
{
- ide_hwif_t *hwif = drive->hwif;
- const struct ide_tp_ops *tp_ops = hwif->tp_ops;
u16 *id;
- unsigned long flags;
- u8 stat;
-
- /*
- * Re-read drive->id for possible DMA mode
- * change (copied from ide-probe.c)
- */
-
- SELECT_MASK(drive, 1);
- tp_ops->set_irq(hwif, 0);
- msleep(50);
- tp_ops->exec_command(hwif, ATA_CMD_ID_ATA);
+ int rc;
- if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) {
- SELECT_MASK(drive, 0);
+ id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
+ if (id == NULL)
return 0;
- }
-
- msleep(50); /* wait for IRQ and ATA_DRQ */
- stat = tp_ops->read_status(hwif);
- if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) {
- SELECT_MASK(drive, 0);
- printk("%s: CHECK for good STATUS\n", drive->name);
- return 0;
- }
- local_irq_save(flags);
+ SELECT_MASK(drive, 1);
+ rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id);
SELECT_MASK(drive, 0);
- id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
- if (!id) {
- local_irq_restore(flags);
- return 0;
- }
- tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
- (void)tp_ops->read_status(hwif); /* clear drive IRQ */
- local_irq_enable();
- local_irq_restore(flags);
- ide_fix_driveid(id);
+
+ if (rc)
+ goto out_err;
drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
@@ -705,6 +314,12 @@ int ide_driveid_update(ide_drive_t *drive)
ide_dma_off(drive);
return 1;
+out_err:
+ SELECT_MASK(drive, 0);
+ if (rc == 2)
+ printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
+ kfree(id);
+ return 0;
}
int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
@@ -731,18 +346,15 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
* but for some reason these don't work at
* this point (lost interrupt).
*/
- /*
- * Select the drive, and issue the SETFEATURES command
- */
- disable_irq_nosync(hwif->irq);
-
+
/*
* FIXME: we race against the running IRQ here if
* this is called from non IRQ context. If we use
* disable_irq() we hang on the error path. Work
* is needed.
*/
-
+ disable_irq_nosync(hwif->irq);
+
udelay(1);
SELECT_DRIVE(drive);
SELECT_MASK(drive, 1);
@@ -812,8 +424,8 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
*
* See also ide_execute_command
*/
-static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
- unsigned int timeout, ide_expiry_t *expiry)
+void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
+ unsigned int timeout, ide_expiry_t *expiry)
{
ide_hwif_t *hwif = drive->hwif;
@@ -835,9 +447,8 @@ void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
__ide_set_handler(drive, handler, timeout, expiry);
spin_unlock_irqrestore(&hwif->lock, flags);
}
-
EXPORT_SYMBOL(ide_set_handler);
-
+
/**
* ide_execute_command - execute an IDE command
* @drive: IDE drive to issue the command against
@@ -847,7 +458,7 @@ EXPORT_SYMBOL(ide_set_handler);
* @expiry: handler to run on timeout
*
* Helper function to issue an IDE command. This handles the
- * atomicity requirements, command timing and ensures that the
+ * atomicity requirements, command timing and ensures that the
* handler and IRQ setup do not race. All IDE command kick off
* should go via this function or do equivalent locking.
*/
@@ -884,301 +495,6 @@ void ide_execute_pkt_cmd(ide_drive_t *drive)
}
EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
-static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
-{
- struct request *rq = drive->hwif->rq;
-
- if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
- ide_end_request(drive, err ? err : 1, 0);
-}
-
-/* needed below */
-static ide_startstop_t do_reset1 (ide_drive_t *, int);
-
-/*
- * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
- * during an atapi drive reset operation. If the drive has not yet responded,
- * and we have not yet hit our maximum waiting time, then the timer is restarted
- * for another 50ms.
- */
-static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- u8 stat;
-
- SELECT_DRIVE(drive);
- udelay (10);
- stat = hwif->tp_ops->read_status(hwif);
-
- if (OK_STAT(stat, 0, ATA_BUSY))
- printk("%s: ATAPI reset complete\n", drive->name);
- else {
- if (time_before(jiffies, hwif->poll_timeout)) {
- ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
- /* continue polling */
- return ide_started;
- }
- /* end of polling */
- hwif->polling = 0;
- printk("%s: ATAPI reset timed-out, status=0x%02x\n",
- drive->name, stat);
- /* do it the old fashioned way */
- return do_reset1(drive, 1);
- }
- /* done polling */
- hwif->polling = 0;
- ide_complete_drive_reset(drive, 0);
- return ide_stopped;
-}
-
-static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
-{
- static const char *err_master_vals[] =
- { NULL, "passed", "formatter device error",
- "sector buffer error", "ECC circuitry error",
- "controlling MPU error" };
-
- u8 err_master = err & 0x7f;
-
- printk(KERN_ERR "%s: reset: master: ", hwif->name);
- if (err_master && err_master < 6)
- printk(KERN_CONT "%s", err_master_vals[err_master]);
- else
- printk(KERN_CONT "error (0x%02x?)", err);
- if (err & 0x80)
- printk(KERN_CONT "; slave: failed");
- printk(KERN_CONT "\n");
-}
-
-/*
- * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
- * during an ide reset operation. If the drives have not yet responded,
- * and we have not yet hit our maximum waiting time, then the timer is restarted
- * for another 50ms.
- */
-static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- const struct ide_port_ops *port_ops = hwif->port_ops;
- u8 tmp;
- int err = 0;
-
- if (port_ops && port_ops->reset_poll) {
- err = port_ops->reset_poll(drive);
- if (err) {
- printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
- hwif->name, drive->name);
- goto out;
- }
- }
-
- tmp = hwif->tp_ops->read_status(hwif);
-
- if (!OK_STAT(tmp, 0, ATA_BUSY)) {
- if (time_before(jiffies, hwif->poll_timeout)) {
- ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
- /* continue polling */
- return ide_started;
- }
- printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
- drive->failures++;
- err = -EIO;
- } else {
- tmp = ide_read_error(drive);
-
- if (tmp == 1) {
- printk(KERN_INFO "%s: reset: success\n", hwif->name);
- drive->failures = 0;
- } else {
- ide_reset_report_error(hwif, tmp);
- drive->failures++;
- err = -EIO;
- }
- }
-out:
- hwif->polling = 0; /* done polling */
- ide_complete_drive_reset(drive, err);
- return ide_stopped;
-}
-
-static void ide_disk_pre_reset(ide_drive_t *drive)
-{
- int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
-
- drive->special.all = 0;
- drive->special.b.set_geometry = legacy;
- drive->special.b.recalibrate = legacy;
-
- drive->mult_count = 0;
- drive->dev_flags &= ~IDE_DFLAG_PARKED;
-
- if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
- (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
- drive->mult_req = 0;
-
- if (drive->mult_req != drive->mult_count)
- drive->special.b.set_multmode = 1;
-}
-
-static void pre_reset(ide_drive_t *drive)
-{
- const struct ide_port_ops *port_ops = drive->hwif->port_ops;
-
- if (drive->media == ide_disk)
- ide_disk_pre_reset(drive);
- else
- drive->dev_flags |= IDE_DFLAG_POST_RESET;
-
- if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
- if (drive->crc_count)
- ide_check_dma_crc(drive);
- else
- ide_dma_off(drive);
- }
-
- if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
- if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
- drive->dev_flags &= ~IDE_DFLAG_UNMASK;
- drive->io_32bit = 0;
- }
- return;
- }
-
- if (port_ops && port_ops->pre_reset)
- port_ops->pre_reset(drive);
-
- if (drive->current_speed != 0xff)
- drive->desired_speed = drive->current_speed;
- drive->current_speed = 0xff;
-}
-
-/*
- * do_reset1() attempts to recover a confused drive by resetting it.
- * Unfortunately, resetting a disk drive actually resets all devices on
- * the same interface, so it can really be thought of as resetting the
- * interface rather than resetting the drive.
- *
- * ATAPI devices have their own reset mechanism which allows them to be
- * individually reset without clobbering other devices on the same interface.
- *
- * Unfortunately, the IDE interface does not generate an interrupt to let
- * us know when the reset operation has finished, so we must poll for this.
- * Equally poor, though, is the fact that this may a very long time to complete,
- * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
- * we set a timer to poll at 50ms intervals.
- */
-static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
-{
- ide_hwif_t *hwif = drive->hwif;
- struct ide_io_ports *io_ports = &hwif->io_ports;
- const struct ide_tp_ops *tp_ops = hwif->tp_ops;
- const struct ide_port_ops *port_ops;
- ide_drive_t *tdrive;
- unsigned long flags, timeout;
- int i;
- DEFINE_WAIT(wait);
-
- spin_lock_irqsave(&hwif->lock, flags);
-
- /* We must not reset with running handlers */
- BUG_ON(hwif->handler != NULL);
-
- /* For an ATAPI device, first try an ATAPI SRST. */
- if (drive->media != ide_disk && !do_not_try_atapi) {
- pre_reset(drive);
- SELECT_DRIVE(drive);
- udelay (20);
- tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
- ndelay(400);
- hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
- hwif->polling = 1;
- __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
- spin_unlock_irqrestore(&hwif->lock, flags);
- return ide_started;
- }
-
- /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
- do {
- unsigned long now;
-
- prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
- timeout = jiffies;
- ide_port_for_each_dev(i, tdrive, hwif) {
- if (tdrive->dev_flags & IDE_DFLAG_PRESENT &&
- tdrive->dev_flags & IDE_DFLAG_PARKED &&
- time_after(tdrive->sleep, timeout))
- timeout = tdrive->sleep;
- }
-
- now = jiffies;
- if (time_before_eq(timeout, now))
- break;
-
- spin_unlock_irqrestore(&hwif->lock, flags);
- timeout = schedule_timeout_uninterruptible(timeout - now);
- spin_lock_irqsave(&hwif->lock, flags);
- } while (timeout);
- finish_wait(&ide_park_wq, &wait);
-
- /*
- * First, reset any device state data we were maintaining
- * for any of the drives on this interface.
- */
- ide_port_for_each_dev(i, tdrive, hwif)
- pre_reset(tdrive);
-
- if (io_ports->ctl_addr == 0) {
- spin_unlock_irqrestore(&hwif->lock, flags);
- ide_complete_drive_reset(drive, -ENXIO);
- return ide_stopped;
- }
-
- /*
- * Note that we also set nIEN while resetting the device,
- * to mask unwanted interrupts from the interface during the reset.
- * However, due to the design of PC hardware, this will cause an
- * immediate interrupt due to the edge transition it produces.
- * This single interrupt gives us a "fast poll" for drives that
- * recover from reset very quickly, saving us the first 50ms wait time.
- *
- * TODO: add ->softreset method and stop abusing ->set_irq
- */
- /* set SRST and nIEN */
- tp_ops->set_irq(hwif, 4);
- /* more than enough time */
- udelay(10);
- /* clear SRST, leave nIEN (unless device is on the quirk list) */
- tp_ops->set_irq(hwif, drive->quirk_list == 2);
- /* more than enough time */
- udelay(10);
- hwif->poll_timeout = jiffies + WAIT_WORSTCASE;
- hwif->polling = 1;
- __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
-
- /*
- * Some weird controller like resetting themselves to a strange
- * state when the disks are reset this way. At least, the Winbond
- * 553 documentation says that
- */
- port_ops = hwif->port_ops;
- if (port_ops && port_ops->resetproc)
- port_ops->resetproc(drive);
-
- spin_unlock_irqrestore(&hwif->lock, flags);
- return ide_started;
-}
-
-/*
- * ide_do_reset() is the entry point to the drive/interface reset code.
- */
-
-ide_startstop_t ide_do_reset (ide_drive_t *drive)
-{
- return do_reset1(drive, 0);
-}
-
-EXPORT_SYMBOL(ide_do_reset);
-
/*
* ide_wait_not_busy() waits for the currently selected device on the hwif
* to report a non-busy status, see comments in ide_probe_port().
@@ -1187,7 +503,7 @@ int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
{
u8 stat = 0;
- while(timeout--) {
+ while (timeout--) {
/*
* Turn this into a schedule() sleep once I'm sure
* about locking issues (2.5 work ?).