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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>
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parent
d7c307cfe7
commit
3eb37ff06b
2 changed files with 86 additions and 2 deletions
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@ -82,6 +82,11 @@
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#define PALMTX_PHYS_FLASH_START PXA_CS0_PHYS /* ChipSelect 0 */
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#define PALMTX_PHYS_NAND_START PXA_CS1_PHYS /* ChipSelect 1 */
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#define PALMTX_NAND_ALE_PHYS (PALMTX_PHYS_NAND_START | (1 << 24))
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#define PALMTX_NAND_CLE_PHYS (PALMTX_PHYS_NAND_START | (1 << 25))
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#define PALMTX_NAND_ALE_VIRT 0xff100000
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#define PALMTX_NAND_CLE_VIRT 0xff200000
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/* TOUCHSCREEN */
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#define AC97_LINK_FRAME 21
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@ -28,6 +28,8 @@
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#include <linux/wm97xx_batt.h>
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#include <linux/power_supply.h>
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#include <linux/usb/gpio_vbus.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/partitions.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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@ -131,6 +133,10 @@ static unsigned long palmtx_pin_config[] __initdata = {
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GPIO34_FFUART_RXD,
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GPIO39_FFUART_TXD,
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/* NAND */
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GPIO15_nCS_1,
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GPIO18_RDY,
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/* MISC. */
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GPIO10_GPIO, /* hotsync button */
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GPIO12_GPIO, /* power detect */
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@ -421,6 +427,68 @@ static struct pxafb_mach_info palmtx_lcd_screen = {
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.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
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};
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/******************************************************************************
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* NAND Flash
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******************************************************************************/
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static void palmtx_nand_cmd_ctl(struct mtd_info *mtd, int cmd,
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unsigned int ctrl)
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{
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struct nand_chip *this = mtd->priv;
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unsigned long nandaddr = (unsigned long)this->IO_ADDR_W;
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if (cmd == NAND_CMD_NONE)
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return;
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if (ctrl & NAND_CLE)
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writeb(cmd, PALMTX_NAND_CLE_VIRT);
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else if (ctrl & NAND_ALE)
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writeb(cmd, PALMTX_NAND_ALE_VIRT);
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else
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writeb(cmd, nandaddr);
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}
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static struct mtd_partition palmtx_partition_info[] = {
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[0] = {
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.name = "palmtx-0",
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.offset = 0,
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.size = MTDPART_SIZ_FULL
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},
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};
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static const char *palmtx_part_probes[] = { "cmdlinepart", NULL };
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struct platform_nand_data palmtx_nand_platdata = {
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.chip = {
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.nr_chips = 1,
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.chip_offset = 0,
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.nr_partitions = ARRAY_SIZE(palmtx_partition_info),
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.partitions = palmtx_partition_info,
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.chip_delay = 20,
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.part_probe_types = palmtx_part_probes,
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},
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.ctrl = {
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.cmd_ctrl = palmtx_nand_cmd_ctl,
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},
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};
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static struct resource palmtx_nand_resource[] = {
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[0] = {
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.start = PXA_CS1_PHYS,
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.end = PXA_CS1_PHYS + SZ_1M - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct platform_device palmtx_nand = {
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.name = "gen_nand",
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.num_resources = ARRAY_SIZE(palmtx_nand_resource),
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.resource = palmtx_nand_resource,
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.id = -1,
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.dev = {
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.platform_data = &palmtx_nand_platdata,
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}
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};
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/******************************************************************************
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* Power management - standby
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******************************************************************************/
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@ -447,6 +515,7 @@ static struct platform_device *devices[] __initdata = {
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&power_supply,
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&palmtx_asoc,
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&palmtx_gpio_vbus,
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&palmtx_nand,
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};
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static struct map_desc palmtx_io_desc[] __initdata = {
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@ -454,8 +523,18 @@ static struct map_desc palmtx_io_desc[] __initdata = {
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.virtual = PALMTX_PCMCIA_VIRT,
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.pfn = __phys_to_pfn(PALMTX_PCMCIA_PHYS),
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.length = PALMTX_PCMCIA_SIZE,
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.type = MT_DEVICE
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},
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.type = MT_DEVICE,
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}, {
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.virtual = PALMTX_NAND_ALE_VIRT,
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.pfn = __phys_to_pfn(PALMTX_NAND_ALE_PHYS),
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.length = SZ_1M,
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.type = MT_DEVICE,
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}, {
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.virtual = PALMTX_NAND_CLE_VIRT,
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.pfn = __phys_to_pfn(PALMTX_NAND_CLE_PHYS),
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.length = SZ_1M,
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.type = MT_DEVICE,
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}
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};
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static void __init palmtx_map_io(void)
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