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path: root/drivers/ide/ide-probe.c
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Diffstat (limited to 'drivers/ide/ide-probe.c')
-rw-r--r--drivers/ide/ide-probe.c257
1 files changed, 58 insertions, 199 deletions
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index ee8e3e7cad51..974067043fba 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -181,16 +181,16 @@ static void ide_classify_atapi_dev(ide_drive_t *drive)
* do_identify - identify a drive
* @drive: drive to identify
* @cmd: command used
+ * @id: buffer for IDENTIFY data
*
* Called when we have issued a drive identify command to
* read and parse the results. This function is run with
* interrupts disabled.
*/
-static void do_identify(ide_drive_t *drive, u8 cmd)
+static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
{
ide_hwif_t *hwif = drive->hwif;
- u16 *id = drive->id;
char *m = (char *)&id[ATA_ID_PROD];
unsigned long flags;
int bswap = 1;
@@ -233,16 +233,6 @@ static void do_identify(ide_drive_t *drive, u8 cmd)
drive->dev_flags |= IDE_DFLAG_PRESENT;
drive->dev_flags &= ~IDE_DFLAG_DEAD;
- /*
- * Check for an ATAPI device
- */
- if (cmd == ATA_CMD_ID_ATAPI)
- ide_classify_atapi_dev(drive);
- else
- /*
- * Not an ATAPI device: looks like a "regular" hard disk
- */
- ide_classify_ata_dev(drive);
return;
err_misc:
kfree(id);
@@ -250,21 +240,19 @@ err_misc:
}
/**
- * actual_try_to_identify - send ata/atapi identify
+ * ide_dev_read_id - send ATA/ATAPI IDENTIFY command
* @drive: drive to identify
* @cmd: command to use
+ * @id: buffer for IDENTIFY data
*
- * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
- * and waits for a response. It also monitors irqs while this is
- * happening, in hope of automatically determining which one is
- * being used by the interface.
+ * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
*
* Returns: 0 device was identified
* 1 device timed-out (no response to identify request)
* 2 device aborted the command (refused to identify itself)
*/
-static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
+int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id)
{
ide_hwif_t *hwif = drive->hwif;
struct ide_io_ports *io_ports = &hwif->io_ports;
@@ -273,6 +261,13 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
unsigned long timeout;
u8 s = 0, a = 0;
+ /*
+ * Disable device IRQ. Otherwise we'll get spurious interrupts
+ * during the identify phase that the IRQ handler isn't expecting.
+ */
+ if (io_ports->ctl_addr)
+ tp_ops->set_irq(hwif, 0);
+
/* take a deep breath */
msleep(50);
@@ -317,7 +312,7 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
/* drive returned ID */
- do_identify(drive, cmd);
+ do_identify(drive, cmd, id);
/* drive responded with ID */
rc = 0;
/* clear drive IRQ */
@@ -329,63 +324,6 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
return rc;
}
-/**
- * try_to_identify - try to identify a drive
- * @drive: drive to probe
- * @cmd: command to use
- *
- * Issue the identify command and then do IRQ probing to
- * complete the identification when needed by finding the
- * IRQ the drive is attached to
- */
-
-static int try_to_identify (ide_drive_t *drive, u8 cmd)
-{
- ide_hwif_t *hwif = drive->hwif;
- const struct ide_tp_ops *tp_ops = hwif->tp_ops;
- int retval;
- int autoprobe = 0;
- unsigned long cookie = 0;
-
- /*
- * Disable device irq unless we need to
- * probe for it. Otherwise we'll get spurious
- * interrupts during the identify-phase that
- * the irq handler isn't expecting.
- */
- if (hwif->io_ports.ctl_addr) {
- if (!hwif->irq) {
- autoprobe = 1;
- cookie = probe_irq_on();
- }
- tp_ops->set_irq(hwif, autoprobe);
- }
-
- retval = actual_try_to_identify(drive, cmd);
-
- if (autoprobe) {
- int irq;
-
- tp_ops->set_irq(hwif, 0);
- /* clear drive IRQ */
- (void)tp_ops->read_status(hwif);
- udelay(5);
- irq = probe_irq_off(cookie);
- if (!hwif->irq) {
- if (irq > 0) {
- hwif->irq = irq;
- } else {
- /* Mmmm.. multiple IRQs..
- * don't know which was ours
- */
- printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n",
- drive->name, cookie);
- }
- }
- }
- return retval;
-}
-
int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus)
{
u8 stat;
@@ -440,6 +378,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
{
ide_hwif_t *hwif = drive->hwif;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
+ u16 *id = drive->id;
int rc;
u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
@@ -475,11 +414,10 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
present || cmd == ATA_CMD_ID_ATAPI) {
- /* send cmd and wait */
- if ((rc = try_to_identify(drive, cmd))) {
+ rc = ide_dev_read_id(drive, cmd, id);
+ if (rc)
/* failed: try again */
- rc = try_to_identify(drive,cmd);
- }
+ rc = ide_dev_read_id(drive, cmd, id);
stat = tp_ops->read_status(hwif);
@@ -494,7 +432,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
msleep(50);
tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
(void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0);
- rc = try_to_identify(drive, cmd);
+ rc = ide_dev_read_id(drive, cmd, id);
}
/* ensure drive IRQ is clear */
@@ -517,37 +455,6 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
return rc;
}
-/*
- *
- */
-static void enable_nest (ide_drive_t *drive)
-{
- ide_hwif_t *hwif = drive->hwif;
- const struct ide_tp_ops *tp_ops = hwif->tp_ops;
- u8 stat;
-
- printk(KERN_INFO "%s: enabling %s -- ",
- hwif->name, (char *)&drive->id[ATA_ID_PROD]);
-
- SELECT_DRIVE(drive);
- msleep(50);
- tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST);
-
- if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) {
- printk(KERN_CONT "failed (timeout)\n");
- return;
- }
-
- msleep(50);
-
- stat = tp_ops->read_status(hwif);
-
- if (!OK_STAT(stat, 0, BAD_STAT))
- printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
- else
- printk(KERN_CONT "success\n");
-}
-
/**
* probe_for_drives - upper level drive probe
* @drive: drive to probe for
@@ -563,6 +470,8 @@ static void enable_nest (ide_drive_t *drive)
static u8 probe_for_drive(ide_drive_t *drive)
{
char *m;
+ int rc;
+ u8 cmd;
/*
* In order to keep things simple we have an id
@@ -586,21 +495,19 @@ static u8 probe_for_drive(ide_drive_t *drive)
/* skip probing? */
if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
-retry:
/* if !(success||timed-out) */
- if (do_probe(drive, ATA_CMD_ID_ATA) >= 2)
+ cmd = ATA_CMD_ID_ATA;
+ rc = do_probe(drive, cmd);
+ if (rc >= 2) {
/* look for ATAPI device */
- (void)do_probe(drive, ATA_CMD_ID_ATAPI);
+ cmd = ATA_CMD_ID_ATAPI;
+ rc = do_probe(drive, cmd);
+ }
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
/* drive not found */
return 0;
- if (strstr(m, "E X A B Y T E N E S T")) {
- enable_nest(drive);
- goto retry;
- }
-
/* identification failed? */
if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
if (drive->media == ide_disk) {
@@ -614,8 +521,12 @@ retry:
printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
drive->dev_flags &= ~IDE_DFLAG_PRESENT;
}
+ } else {
+ if (cmd == ATA_CMD_ID_ATAPI)
+ ide_classify_atapi_dev(drive);
+ else
+ ide_classify_ata_dev(drive);
}
- /* drive was found */
}
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
@@ -779,7 +690,6 @@ EXPORT_SYMBOL_GPL(ide_undecoded_slave);
static int ide_probe_port(ide_hwif_t *hwif)
{
ide_drive_t *drive;
- unsigned long flags;
unsigned int irqd;
int i, rc = -ENODEV;
@@ -797,9 +707,6 @@ static int ide_probe_port(ide_hwif_t *hwif)
if (irqd)
disable_irq(hwif->irq);
- local_save_flags(flags);
- local_irq_enable_in_hardirq();
-
if (ide_port_wait_ready(hwif) == -EBUSY)
printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
@@ -813,8 +720,6 @@ static int ide_probe_port(ide_hwif_t *hwif)
rc = 0;
}
- local_irq_restore(flags);
-
/*
* Use cached IRQ number. It might be (and is...) changed by probe
* code above
@@ -831,29 +736,18 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)
ide_drive_t *drive;
int i;
- ide_port_for_each_dev(i, drive, hwif) {
- if (drive->dev_flags & IDE_DFLAG_PRESENT) {
- if (port_ops && port_ops->quirkproc)
- port_ops->quirkproc(drive);
- }
+ ide_port_for_each_present_dev(i, drive, hwif) {
+ if (port_ops && port_ops->quirkproc)
+ port_ops->quirkproc(drive);
}
- ide_port_for_each_dev(i, drive, hwif) {
- if (drive->dev_flags & IDE_DFLAG_PRESENT) {
- ide_set_max_pio(drive);
+ ide_port_for_each_present_dev(i, drive, hwif) {
+ ide_set_max_pio(drive);
- drive->dev_flags |= IDE_DFLAG_NICE1;
-
- if (hwif->dma_ops)
- ide_set_dma(drive);
- }
- }
+ drive->dev_flags |= IDE_DFLAG_NICE1;
- ide_port_for_each_dev(i, drive, hwif) {
- if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
- drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
- else
- drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT;
+ if (hwif->dma_ops)
+ ide_set_dma(drive);
}
}
@@ -924,10 +818,7 @@ static int ide_port_setup_devices(ide_hwif_t *hwif)
int i, j = 0;
mutex_lock(&ide_cfg_mtx);
- ide_port_for_each_dev(i, drive, hwif) {
- if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
- continue;
-
+ ide_port_for_each_present_dev(i, drive, hwif) {
if (ide_init_queue(drive)) {
printk(KERN_ERR "ide: failed to init %s\n",
drive->name);
@@ -953,13 +844,6 @@ static int init_irq (ide_hwif_t *hwif)
irq_handler_t irq_handler;
int sa = 0;
- mutex_lock(&ide_cfg_mtx);
- spin_lock_init(&hwif->lock);
-
- init_timer(&hwif->timer);
- hwif->timer.function = &ide_timer_expiry;
- hwif->timer.data = (unsigned long)hwif;
-
irq_handler = hwif->host->irq_handler;
if (irq_handler == NULL)
irq_handler = ide_intr;
@@ -997,10 +881,8 @@ static int init_irq (ide_hwif_t *hwif)
printk(KERN_CONT " (serialized)");
printk(KERN_CONT "\n");
- mutex_unlock(&ide_cfg_mtx);
return 0;
out_up:
- mutex_unlock(&ide_cfg_mtx);
return 1;
}
@@ -1099,14 +981,9 @@ static void drive_release_dev (struct device *dev)
static int hwif_init(ide_hwif_t *hwif)
{
- int old_irq;
-
if (!hwif->irq) {
- hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
- if (!hwif->irq) {
- printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
- return 0;
- }
+ printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
+ return 0;
}
if (register_blkdev(hwif->major, hwif->name))
@@ -1124,29 +1001,12 @@ static int hwif_init(ide_hwif_t *hwif)
sg_init_table(hwif->sg_table, hwif->sg_max_nents);
- if (init_irq(hwif) == 0)
- goto done;
-
- old_irq = hwif->irq;
- /*
- * It failed to initialise. Find the default IRQ for
- * this port and try that.
- */
- hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
- if (!hwif->irq) {
- printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
- hwif->name, old_irq);
- goto out;
- }
if (init_irq(hwif)) {
- printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n",
- hwif->name, old_irq, hwif->irq);
+ printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
+ hwif->name, hwif->irq);
goto out;
}
- printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n",
- hwif->name, hwif->irq);
-done:
blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
THIS_MODULE, ata_probe, ata_lock, hwif);
return 1;
@@ -1161,13 +1021,10 @@ static void hwif_register_devices(ide_hwif_t *hwif)
ide_drive_t *drive;
unsigned int i;
- ide_port_for_each_dev(i, drive, hwif) {
+ ide_port_for_each_present_dev(i, drive, hwif) {
struct device *dev = &drive->gendev;
int ret;
- if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
- continue;
-
dev_set_name(dev, "%u.%u", hwif->index, i);
dev->parent = &hwif->gendev;
dev->bus = &ide_bus_type;
@@ -1192,6 +1049,8 @@ static void ide_port_init_devices(ide_hwif_t *hwif)
if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
drive->io_32bit = 1;
+ if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
+ drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
drive->dev_flags |= IDE_DFLAG_UNMASK;
if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
@@ -1213,10 +1072,6 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
if (d->init_iops)
d->init_iops(hwif);
- if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
- (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
- hwif->irq = port ? 15 : 14;
-
/* ->host_flags may be set by ->init_iops (or even earlier...) */
hwif->host_flags |= d->host_flags;
hwif->pio_mask = d->pio_mask;
@@ -1317,6 +1172,12 @@ static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
hwif->name[2] = 'e';
hwif->name[3] = '0' + index;
+ spin_lock_init(&hwif->lock);
+
+ init_timer(&hwif->timer);
+ hwif->timer.function = &ide_timer_expiry;
+ hwif->timer.data = (unsigned long)hwif;
+
init_completion(&hwif->gendev_rel_comp);
hwif->tp_ops = &default_tp_ops;
@@ -1567,7 +1428,7 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
j++;
- ide_acpi_init(hwif);
+ ide_acpi_init_port(hwif);
if (hwif->present)
ide_acpi_port_init_devices(hwif);
@@ -1624,11 +1485,9 @@ static void __ide_port_unregister_devices(ide_hwif_t *hwif)
ide_drive_t *drive;
int i;
- ide_port_for_each_dev(i, drive, hwif) {
- if (drive->dev_flags & IDE_DFLAG_PRESENT) {
- device_unregister(&drive->gendev);
- wait_for_completion(&drive->gendev_rel_comp);
- }
+ ide_port_for_each_present_dev(i, drive, hwif) {
+ device_unregister(&drive->gendev);
+ wait_for_completion(&drive->gendev_rel_comp);
}
}