[ARM] pxa/palm: add NAND Flash support for PalmTX

This patch adds support for NAND chip found in PalmTX handheld. Support
is implemented through the gen_nand driver.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

2 files changed, 86 insertions, 2 deletions

diff --git a/arch/arm/mach-pxa/include/mach/palmtx.h b/arch/arm/mach-pxa/include/mach/palmtx.h
index e74082c872e1..1be0db6ed55e 100644
--- a/arch/arm/mach-pxa/include/mach/palmtx.h
+++ b/arch/arm/mach-pxa/include/mach/palmtx.h
@@ -82,6 +82,11 @@
 #define PALMTX_PHYS_FLASH_START PXA_CS0_PHYS    /* ChipSelect 0 */
 #define PALMTX_PHYS_NAND_START  PXA_CS1_PHYS    /* ChipSelect 1 */
 
+#define PALMTX_NAND_ALE_PHYS    (PALMTX_PHYS_NAND_START | (1 << 24))
+#define PALMTX_NAND_CLE_PHYS    (PALMTX_PHYS_NAND_START | (1 << 25))
+#define PALMTX_NAND_ALE_VIRT    0xff100000
+#define PALMTX_NAND_CLE_VIRT    0xff200000
+
 /* TOUCHSCREEN */
 #define AC97_LINK_FRAME                 21
 
diff --git a/arch/arm/mach-pxa/palmtx.c b/arch/arm/mach-pxa/palmtx.c
index fffa32a6fa3f..052f99863dab 100644
--- a/arch/arm/mach-pxa/palmtx.c
+++ b/arch/arm/mach-pxa/palmtx.c
@@ -28,6 +28,8 @@
 #include <linux/wm97xx_batt.h>
 #include <linux/power_supply.h>
 #include <linux/usb/gpio_vbus.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -131,6 +133,10 @@ static unsigned long palmtx_pin_config[] __initdata = {
         GPIO34_FFUART_RXD,
         GPIO39_FFUART_TXD,
 
+        /* NAND */
+        GPIO15_nCS_1,
+        GPIO18_RDY,
+
         /* MISC. */
         GPIO10_GPIO,    /* hotsync button */
         GPIO12_GPIO,    /* power detect */
@@ -422,6 +428,68 @@ static struct pxafb_mach_info palmtx_lcd_screen = {
 };
 
 /******************************************************************************
+ * NAND Flash
+ ******************************************************************************/
+static void palmtx_nand_cmd_ctl(struct mtd_info *mtd, int cmd,
+                                 unsigned int ctrl)
+{
+        struct nand_chip *this = mtd->priv;
+        unsigned long nandaddr = (unsigned long)this->IO_ADDR_W;
+
+        if (cmd == NAND_CMD_NONE)
+                return;
+
+        if (ctrl & NAND_CLE)
+                writeb(cmd, PALMTX_NAND_CLE_VIRT);
+        else if (ctrl & NAND_ALE)
+                writeb(cmd, PALMTX_NAND_ALE_VIRT);
+        else
+                writeb(cmd, nandaddr);
+}
+
+static struct mtd_partition palmtx_partition_info[] = {
+        [0] = {
+                .name   = "palmtx-0",
+                .offset = 0,
+                .size   = MTDPART_SIZ_FULL
+        },
+};
+
+static const char *palmtx_part_probes[] = { "cmdlinepart", NULL };
+
+struct platform_nand_data palmtx_nand_platdata = {
+        .chip   = {
+                .nr_chips               = 1,
+                .chip_offset            = 0,
+                .nr_partitions          = ARRAY_SIZE(palmtx_partition_info),
+                .partitions             = palmtx_partition_info,
+                .chip_delay             = 20,
+                .part_probe_types       = palmtx_part_probes,
+        },
+        .ctrl   = {
+                .cmd_ctrl       = palmtx_nand_cmd_ctl,
+        },
+};
+
+static struct resource palmtx_nand_resource[] = {
+        [0]     = {
+                .start  = PXA_CS1_PHYS,
+                .end    = PXA_CS1_PHYS + SZ_1M - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device palmtx_nand = {
+        .name           = "gen_nand",
+        .num_resources  = ARRAY_SIZE(palmtx_nand_resource),
+        .resource       = palmtx_nand_resource,
+        .id             = -1,
+        .dev            = {
+                .platform_data  = &palmtx_nand_platdata,
+        }
+};
+
+/******************************************************************************
  * Power management - standby
  ******************************************************************************/
 static void __init palmtx_pm_init(void)
@@ -447,6 +515,7 @@ static struct platform_device *devices[] __initdata = {
         &power_supply,
         &palmtx_asoc,
         &palmtx_gpio_vbus,
+        &palmtx_nand,
 };
 
 static struct map_desc palmtx_io_desc[] __initdata = {
@@ -454,8 +523,18 @@ static struct map_desc palmtx_io_desc[] __initdata = {
         .virtual        = PALMTX_PCMCIA_VIRT,
         .pfn            = __phys_to_pfn(PALMTX_PCMCIA_PHYS),
         .length         = PALMTX_PCMCIA_SIZE,
-        .type           = MT_DEVICE
-},
+        .type           = MT_DEVICE,
+}, {
+        .virtual        = PALMTX_NAND_ALE_VIRT,
+        .pfn            = __phys_to_pfn(PALMTX_NAND_ALE_PHYS),
+        .length         = SZ_1M,
+        .type           = MT_DEVICE,
+}, {
+        .virtual        = PALMTX_NAND_CLE_VIRT,
+        .pfn            = __phys_to_pfn(PALMTX_NAND_CLE_PHYS),
+        .length         = SZ_1M,
+        .type           = MT_DEVICE,
+}
 };
 
 static void __init palmtx_map_io(void)