[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>
diff --git a/arch/arm/mach-pxa/palmtx.c b/arch/arm/mach-pxa/palmtx.c
index fffa32a..052f998 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 @@
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 @@
};
/******************************************************************************
+ * 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 @@
&power_supply,
&palmtx_asoc,
&palmtx_gpio_vbus,
+ &palmtx_nand,
};
static struct map_desc palmtx_io_desc[] __initdata = {
@@ -454,8 +523,18 @@
.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)