Commit 3eb37ff0 authored by Marek Vasut's avatar Marek Vasut Committed by Eric Miao
Browse files

[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: default avatarMarek Vasut <marek.vasut@gmail.com>
Signed-off-by: default avatarEric Miao <eric.y.miao@gmail.com>
parent d7c307cf

arch/arm/mach-pxa/include/mach/palmtx.h

+5 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/mach-pxa/palmtx.c

+81 −2
Original line number Diff line number Diff line
@@ -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)