MIPS: Alchemy: pata_platform for DB1200

The au1xxx-ide driver isn't any faster than pata_platform since it
spends a lot of time busy waiting for DMA to finish; faster PIO/DMA
modes only work on the db1200 with a certain cpu speed, UDMA is broken,
and finally the old IDE layer is on death row, so time to switch to
the newer ATA layer.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/6662/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 14 insertions, 7 deletions

diff --git a/arch/mips/alchemy/devboards/db1200.c b/arch/mips/alchemy/devboards/db1200.c
index 4bcf2f4e4f93..9e46667f2597 100644
--- a/arch/mips/alchemy/devboards/db1200.c
+++ b/arch/mips/alchemy/devboards/db1200.c
@@ -35,6 +35,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/flash.h>
 #include <linux/smc91x.h>
+#include <linux/ata_platform.h>
 #include <asm/mach-au1x00/au1000.h>
 #include <asm/mach-au1x00/au1100_mmc.h>
 #include <asm/mach-au1x00/au1xxx_dbdma.h>
@@ -330,32 +331,38 @@ static struct platform_device db1200_eth_dev = {
 
 /**********************************************************************/
 
+static struct pata_platform_info db1200_ide_info = {
+        .ioport_shift   = DB1200_IDE_REG_SHIFT,
+};
+
+#define IDE_ALT_START   (14 << DB1200_IDE_REG_SHIFT)
 static struct resource db1200_ide_res[] = {
         [0] = {
                 .start  = DB1200_IDE_PHYS_ADDR,
-                .end    = DB1200_IDE_PHYS_ADDR + DB1200_IDE_PHYS_LEN - 1,
+                .end    = DB1200_IDE_PHYS_ADDR + IDE_ALT_START - 1,
                 .flags  = IORESOURCE_MEM,
         },
         [1] = {
+                .start  = DB1200_IDE_PHYS_ADDR + IDE_ALT_START,
+                .end    = DB1200_IDE_PHYS_ADDR + DB1200_IDE_PHYS_LEN - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [2] = {
                 .start  = DB1200_IDE_INT,
                 .end    = DB1200_IDE_INT,
                 .flags  = IORESOURCE_IRQ,
         },
-        [2] = {
-                .start  = AU1200_DSCR_CMD0_DMA_REQ1,
-                .end    = AU1200_DSCR_CMD0_DMA_REQ1,
-                .flags  = IORESOURCE_DMA,
-        },
 };
 
 static u64 au1200_ide_dmamask = DMA_BIT_MASK(32);
 
 static struct platform_device db1200_ide_dev = {
-        .name           = "au1200-ide",
+        .name           = "pata_platform",
         .id             = 0,
         .dev = {
                 .dma_mask               = &au1200_ide_dmamask,
                 .coherent_dma_mask      = DMA_BIT_MASK(32),
+                .platform_data          = &db1200_ide_info,
         },
         .num_resources  = ARRAY_SIZE(db1200_ide_res),
         .resource       = db1200_ide_res,