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Subject[PATCH 09/18] ide: rework PowerMac media-bay support
Rework PowerMac media-bay support in such way that instead of
un/registering the IDE interface we un/register IDE devices:

* Add ide_port_scan() helper for probing+registerering devices on a port.

* Rename ide_port_unregister_devices() to __ide_port_unregister_devices().

* Add ide_port_unregister_devices() helper for unregistering devices on a port.

* Add 'ide_hwif_t *cd_port' to 'struct media_bay_info', pass 'hwif' instead
of hwif->index to media_bay_set_ide_infos() and use it to setup 'cd_port'.

* Use ide_port_unregister_devices() instead of ide_unregister()
and ide_port_scan() instead of ide_register_hw() in media_bay_step().

* Unexport ide_register_hw() and make it static.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/ide-probe.c | 18 ++++++++++++++++++
drivers/ide/ide.c | 22 ++++++++++++++++------
drivers/ide/ppc/pmac.c | 3 ++-
drivers/macintosh/mediabay.c | 17 +++++++----------
include/asm-powerpc/mediabay.h | 4 +++-
include/linux/ide.h | 6 ++----
6 files changed, 48 insertions(+), 22 deletions(-)
Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1490,3 +1490,21 @@ int ide_device_add(u8 idx[4], const stru
return ide_device_add_all(idx_all, d);
}
EXPORT_SYMBOL_GPL(ide_device_add);
+
+void ide_port_scan(ide_hwif_t *hwif)
+{
+ ide_port_cable_detect(hwif);
+ ide_port_init_devices(hwif);
+
+ if (ide_probe_port(hwif) < 0)
+ return;
+
+ hwif->present = 1;
+
+ ide_port_tune_devices(hwif);
+ ide_acpi_port_init_devices(hwif);
+ ide_port_setup_devices(hwif);
+ hwif_register_devices(hwif);
+ ide_proc_port_register_devices(hwif);
+}
+EXPORT_SYMBOL_GPL(ide_port_scan);
Index: b/drivers/ide/ide.c
===================================================================
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -506,7 +506,7 @@ void ide_remove_port_from_hwgroup(ide_hw
}

/* Called with ide_lock held. */
-static void ide_port_unregister_devices(ide_hwif_t *hwif)
+static void __ide_port_unregister_devices(ide_hwif_t *hwif)
{
int i;

@@ -522,6 +522,18 @@ static void ide_port_unregister_devices(
}
}

+void ide_port_unregister_devices(ide_hwif_t *hwif)
+{
+ mutex_lock(&ide_cfg_mtx);
+ spin_lock_irq(&ide_lock);
+ __ide_port_unregister_devices(hwif);
+ hwif->present = 0;
+ ide_port_init_devices_data(hwif);
+ spin_unlock_irq(&ide_lock);
+ mutex_unlock(&ide_cfg_mtx);
+}
+EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
+
/**
* ide_unregister - free an IDE interface
* @index: index of interface (will change soon to a pointer)
@@ -562,7 +574,7 @@ void ide_unregister(unsigned int index,
hwif = &ide_hwifs[index];
if (!hwif->present)
goto abort;
- ide_port_unregister_devices(hwif);
+ __ide_port_unregister_devices(hwif);
hwif->present = 0;

spin_unlock_irq(&ide_lock);
@@ -657,8 +669,8 @@ EXPORT_SYMBOL_GPL(ide_init_port_hw);
* Returns -1 on error.
*/

-int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
- ide_hwif_t **hwifp)
+static int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
+ ide_hwif_t **hwifp)
{
int index, retry = 1;
ide_hwif_t *hwif;
@@ -692,8 +704,6 @@ found:
return hwif->present ? index : -1;
}

-EXPORT_SYMBOL(ide_register_hw);
-
/*
* Locks for IDE setting functionality
*/
Index: b/drivers/ide/ppc/pmac.c
===================================================================
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -1088,7 +1088,8 @@ pmac_ide_setup_device(pmac_ide_hwif_t *p
if (np->parent && np->parent->name
&& strcasecmp(np->parent->name, "media-bay") == 0) {
#ifdef CONFIG_PMAC_MEDIABAY
- media_bay_set_ide_infos(np->parent, pmif->regbase, pmif->irq, hwif->index);
+ media_bay_set_ide_infos(np->parent, pmif->regbase, pmif->irq,
+ hwif);
#endif /* CONFIG_PMAC_MEDIABAY */
pmif->mediabay = 1;
if (!bidp)
Index: b/drivers/macintosh/mediabay.c
===================================================================
--- a/drivers/macintosh/mediabay.c
+++ b/drivers/macintosh/mediabay.c
@@ -79,6 +79,7 @@ struct media_bay_info {
int sleeping;
struct semaphore lock;
#ifdef CONFIG_BLK_DEV_IDE_PMAC
+ ide_hwif_t *cd_port;
void __iomem *cd_base;
int cd_irq;
int cd_retry;
@@ -450,7 +451,7 @@ int check_media_bay_by_base(unsigned lon
}

int media_bay_set_ide_infos(struct device_node* which_bay, unsigned long base,
- int irq, int index)
+ int irq, ide_hwif_t *hwif)
{
int i;

@@ -458,10 +459,11 @@ int media_bay_set_ide_infos(struct devic
struct media_bay_info* bay = &media_bays[i];

if (bay->mdev && which_bay == bay->mdev->ofdev.node) {
- int timeout = 5000;
+ int timeout = 5000, index = hwif->index;

down(&bay->lock);

+ bay->cd_port = hwif;
bay->cd_base = (void __iomem *) base;
bay->cd_irq = irq;

@@ -553,15 +555,10 @@ static void media_bay_step(int i)
bay->timer = 0;
bay->state = mb_up;
if (bay->cd_index < 0) {
- hw_regs_t hw;
-
printk("mediabay %d, registering IDE...\n", i);
pmu_suspend();
- ide_init_hwif_ports(&hw, (unsigned long) bay->cd_base, (unsigned long) 0, NULL);
- hw.irq = bay->cd_irq;
- hw.chipset = ide_pmac;
- bay->cd_index =
- ide_register_hw(&hw, NULL, NULL);
+ ide_port_scan(bay->cd_port);
+ bay->cd_index = bay->cd_port->index;
pmu_resume();
}
if (bay->cd_index == -1) {
@@ -591,7 +588,7 @@ static void media_bay_step(int i)
if (bay->cd_index >= 0) {
printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i,
bay->cd_index);
- ide_unregister(bay->cd_index, 1, 1);
+ ide_port_unregister_devices(bay->cd_port);
bay->cd_index = -1;
}
if (bay->cd_retry) {
Index: b/include/asm-powerpc/mediabay.h
===================================================================
--- a/include/asm-powerpc/mediabay.h
+++ b/include/asm-powerpc/mediabay.h
@@ -22,10 +22,12 @@ int check_media_bay(struct device_node *
/* Number of bays in the machine or 0 */
extern int media_bay_count;

+#ifdef CONFIG_BLK_DEV_IDE_PMAC
int check_media_bay_by_base(unsigned long base, int what);
/* called by IDE PMAC host driver to register IDE controller for media bay */
int media_bay_set_ide_infos(struct device_node *which_bay, unsigned long base,
- int irq, int index);
+ int irq, ide_hwif_t *hwif);
+#endif

#endif /* __KERNEL__ */
#endif /* _PPC_MEDIABAY_H */
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -189,10 +189,6 @@ struct hwif_s * ide_find_port(unsigned l
void ide_init_port_data(struct hwif_s *, unsigned int);
void ide_init_port_hw(struct hwif_s *, hw_regs_t *);

-struct ide_drive_s;
-int ide_register_hw(hw_regs_t *, void (*)(struct ide_drive_s *),
- struct hwif_s **);
-
static inline void ide_std_init_ports(hw_regs_t *hw,
unsigned long io_addr,
unsigned long ctl_addr)
@@ -1202,6 +1198,8 @@ void ide_undecoded_slave(ide_drive_t *);

int ide_device_add_all(u8 *idx, const struct ide_port_info *);
int ide_device_add(u8 idx[4], const struct ide_port_info *);
+void ide_port_unregister_devices(ide_hwif_t *);
+void ide_port_scan(ide_hwif_t *);

static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
{

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