libata: PATA driver for Celleb

This is the patch for PATA controller of Celleb.

This driver uses the managed iomap (devres).

Because this driver needs special taskfile accesses, there is
a copy of ata_std_softreset(). ata_dev_try_classify() is exported
so that it can be used in this function.
Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
Signed-off-by: Akira Iguchi <akira2.iguchi@toshiba.co.jp>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/Kconfig

@@ -562,6 +562,15 @@ config PATA_IXP4XX_CF
 
 	  If unsure, say N.
 
+config PATA_SCC
+	tristate "Toshiba's Cell Reference Set IDE support"
+	depends on PCI
+	help
+	  This option enables support for the built-in IDE controller on
+	  Toshiba Cell Reference Board.
+
+	  If unsure, say N.
+
 endif
 endmenu
 

drivers/ata/Makefile

@@ -59,6 +59,7 @@ obj-$(CONFIG_PATA_WINBOND_VLB)	+= pata_winbond.o
 obj-$(CONFIG_PATA_SIS)		+= pata_sis.o
 obj-$(CONFIG_PATA_TRIFLEX)	+= pata_triflex.o
 obj-$(CONFIG_PATA_IXP4XX_CF)	+= pata_ixp4xx_cf.o
+obj-$(CONFIG_PATA_SCC)		+= pata_scc.o
 obj-$(CONFIG_PATA_PLATFORM)	+= pata_platform.o
 # Should be last but one libata driver
 obj-$(CONFIG_ATA_GENERIC)	+= ata_generic.o

drivers/ata/libata-core.c

@@ -708,7 +708,7 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
  *	Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
  */
 
-static unsigned int
+unsigned int
 ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
 {
 	struct ata_taskfile tf;
@@ -6311,3 +6311,4 @@ EXPORT_SYMBOL_GPL(ata_irq_on);
 EXPORT_SYMBOL_GPL(ata_dummy_irq_on);
 EXPORT_SYMBOL_GPL(ata_irq_ack);
 EXPORT_SYMBOL_GPL(ata_dummy_irq_ack);
+EXPORT_SYMBOL_GPL(ata_dev_try_classify);

include/linux/libata.h

@@ -759,6 +759,7 @@ extern void ata_port_queue_task(struct ata_port *ap, work_func_t fn,
 extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
 			     unsigned long interval_msec,
 			     unsigned long timeout_msec);
+extern unsigned int ata_dev_try_classify(struct ata_port *, unsigned int, u8 *);
 
 /*
  * Default driver ops implementations