Cleaned up AMD Au1200 IDE driver:

- converted to platform bus
- removed pci dependencies
- removed virt_to_phys/phys_to_virt calls
    
System now can root off of a disk.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/Documentation/mips/AU1xxx_IDE.README b/Documentation/mips/AU1xxx_IDE.README
new file mode 100644

4 files changed, 41 insertions, 5 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 8746e1b1621b..dc5c629af106 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -799,7 +799,7 @@ config MIPS_BOSPORUS
 config MIPS_DB1200
         bool "AMD Alchemy DB1200 board"
         select SOC_AU1200
-        select DMA_NONCOHERENT
+        select DMA_COHERENT
         select MIPS_DISABLE_OBSOLETE_IDE
         select SYS_SUPPORTS_LITTLE_ENDIAN
 
diff --git a/arch/mips/au1000/common/dbdma.c b/arch/mips/au1000/common/dbdma.c
index 8f78c2fe7cf5..eb5803aed91b 100644
--- a/arch/mips/au1000/common/dbdma.c
+++ b/arch/mips/au1000/common/dbdma.c
@@ -197,6 +197,12 @@ find_dbdev_id (u32 id)
         return NULL;
 }
 
+void * au1xxx_ddma_get_nextptr_virt(au1x_ddma_desc_t *dp)
+{
+        return phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
+}
+EXPORT_SYMBOL(au1xxx_ddma_get_nextptr_virt);
+
 u32
 au1xxx_ddma_add_device(dbdev_tab_t *dev)
 {
diff --git a/arch/mips/au1000/common/platform.c b/arch/mips/au1000/common/platform.c
index 0c3fd726c3d6..4aca18f0e290 100644
--- a/arch/mips/au1000/common/platform.c
+++ b/arch/mips/au1000/common/platform.c
@@ -12,7 +12,7 @@
 #include <linux/init.h>
 #include <linux/resource.h>
 
-#include <asm/mach-au1x00/au1000.h>
+#include <asm/mach-au1x00/au1xxx.h>
 
 /* OHCI (USB full speed host controller) */
 static struct resource au1xxx_usb_ohci_resources[] = {
@@ -154,7 +154,6 @@ static struct platform_device au1xxx_usb_otg_device = {
         .resource       = au1xxx_usb_otg_resources,
 };
 
-/*** AU1200 LCD controller ***/
 static struct resource au1200_lcd_resources[] = {
         [0] = {
                 .start          = LCD_PHYS_ADDR,
@@ -168,6 +167,19 @@ static struct resource au1200_lcd_resources[] = {
         }
 };
 
+static struct resource au1200_ide0_resources[] = {
+        [0] = {
+                .start          = AU1XXX_ATA_PHYS_ADDR,
+                .end            = AU1XXX_ATA_PHYS_ADDR + AU1XXX_ATA_PHYS_LEN,
+                .flags          = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start          = AU1XXX_ATA_INT,
+                .end            = AU1XXX_ATA_INT,
+                .flags          = IORESOURCE_IRQ,
+        }
+};
+
 static u64 au1200_lcd_dmamask = ~(u32)0;
 
 static struct platform_device au1200_lcd_device = {
@@ -180,6 +192,21 @@ static struct platform_device au1200_lcd_device = {
         .num_resources  = ARRAY_SIZE(au1200_lcd_resources),
         .resource       = au1200_lcd_resources,
 };
+
+
+static u64 ide0_dmamask = ~(u32)0;
+
+static struct platform_device au1200_ide0_device = {
+        .name           = "au1200-ide",
+        .id             = 0,
+        .dev = {
+                .dma_mask               = &ide0_dmamask,
+                .coherent_dma_mask      = 0xffffffff,
+        },
+        .num_resources = ARRAY_SIZE(au1200_ide0_resources),
+        .resource       = au1200_ide0_resources,
+};
+
 #endif
 
 static struct platform_device *au1xxx_platform_devices[] __initdata = {
@@ -194,6 +221,7 @@ static struct platform_device *au1xxx_platform_devices[] __initdata = {
         &au1xxx_usb_gdt_device,
         &au1xxx_usb_otg_device,
         &au1200_lcd_device,
+        &au1200_ide0_device,
 #endif
 };
 
diff --git a/arch/mips/au1000/pb1200/irqmap.c b/arch/mips/au1000/pb1200/irqmap.c
index 2ec64e78aa01..59e70e5cf325 100644
--- a/arch/mips/au1000/pb1200/irqmap.c
+++ b/arch/mips/au1000/pb1200/irqmap.c
@@ -22,6 +22,7 @@
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
+#include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/init.h>
 #include <linux/irq.h>
@@ -65,7 +66,7 @@ int au1xxx_nr_irqs = sizeof(au1xxx_irq_map)/sizeof(au1xxx_irq_map_t);
  */
 static volatile int pb1200_cascade_en=0;
 
-void pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
 {
         unsigned short bisr = bcsr->int_status;
         int extirq_nr = 0;
@@ -78,6 +79,7 @@ void pb1200_cascade_handler( int irq, void *dev_id, struct pt_regs *regs)
                 /* Ack and dispatch IRQ */
                 do_IRQ(extirq_nr,regs);
         }
+        return IRQ_RETVAL(1);
 }
 
 inline void pb1200_enable_irq(unsigned int irq_nr)
@@ -97,7 +99,7 @@ static unsigned int pb1200_startup_irq( unsigned int irq_nr )
         if (++pb1200_cascade_en == 1)
         {
                 request_irq(AU1000_GPIO_7, &pb1200_cascade_handler,
-                        0, "Pb1200 Cascade", &pb1200_cascade_handler );
+                        0, "Pb1200 Cascade", (void *)&pb1200_cascade_handler );
 #ifdef CONFIG_MIPS_PB1200
     /* We have a problem with CPLD rev3. Enable a workaround */
         if( ((bcsr->whoami & BCSR_WHOAMI_CPLD)>>4) <= 3)