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>

diff --git a/arch/mips/alchemy/devboards/db1200.c b/arch/mips/alchemy/devboards/db1200.c
index 4bcf2f4..9e46667 100644 (file)
--- 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,

diff --git a/arch/mips/configs/db1xxx_defconfig b/arch/mips/configs/db1xxx_defconfig
index 3bccd5b..c99b6ee 100644 (file)
--- a/arch/mips/configs/db1xxx_defconfig
+++ b/arch/mips/configs/db1xxx_defconfig
@@ -115,9 +115,6 @@ CONFIG_MTD_NAND_AU1550=y
 CONFIG_MTD_NAND_PLATFORM=y
 CONFIG_EEPROM_AT24=y
 CONFIG_EEPROM_AT25=y
-CONFIG_IDE=y
-CONFIG_IDE_TASK_IOCTL=y
-CONFIG_BLK_DEV_IDE_AU1XXX=y
 CONFIG_SCSI_TGT=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_CHR_DEV_SG=y