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[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>
This commit is contained in:
Marek Vasut 2009-07-18 16:51:41 +02:00 committed by Eric Miao
parent d7c307cfe7
commit 3eb37ff06b
2 changed files with 86 additions and 2 deletions
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5
arch/arm/mach-pxa/include/mach/palmtx.h
View File

@ -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

83
arch/arm/mach-pxa/palmtx.c
View File

@ -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 */
@ -421,6 +427,68 @@ static struct pxafb_mach_info palmtx_lcd_screen = {
.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
};
/******************************************************************************
* 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
******************************************************************************/
@ -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)