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Commit cddb483a authored by Enric Balletbo i Serra's avatar Enric Balletbo i Serra Committed by Tony Lindgren
Browse files

omap3: Add support for flash on IGEP v2 board 



This patch adds support for flashes on IGEP v2 boards. For now
only OneNAND is supported.

Signed-off-by: default avatarEnric Balletbo i Serra <eballetbo@iseebcn.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 691de27f

arch/arm/mach-omap2/board-igep0020.c

+101 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <plat/gpmc.h>

#include <plat/usb.h>

#include <plat/display.h>

#include <plat/onenand.h>



#include "mux.h"

#include "hsmmc.h"
@@ -41,6 +42,105 @@ 
#define IGEP2_GPIO_LED1_RED   	28

#define IGEP2_GPIO_DVI_PUP	170



#if defined(CONFIG_MTD_ONENAND_OMAP2) || \

	defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)



#define ONENAND_MAP             0x20000000



/* NAND04GR4E1A ( x2 Flash built-in COMBO POP MEMORY )

 * Since the device is equipped with two DataRAMs, and two-plane NAND

 * Flash memory array, these two component enables simultaneous program

 * of 4KiB. Plane1 has only even blocks such as block0, block2, block4

 * while Plane2 has only odd blocks such as block1, block3, block5.

 * So MTD regards it as 4KiB page size and 256KiB block size 64*(2*2048)

 */



static struct mtd_partition igep2_onenand_partitions[] = {

	{

		.name           = "X-Loader",

		.offset         = 0,

		.size           = 2 * (64*(2*2048))

	},

	{

		.name           = "U-Boot",

		.offset         = MTDPART_OFS_APPEND,

		.size           = 6 * (64*(2*2048)),

	},

	{

		.name           = "Environment",

		.offset         = MTDPART_OFS_APPEND,

		.size           = 2 * (64*(2*2048)),

	},

	{

		.name           = "Kernel",

		.offset         = MTDPART_OFS_APPEND,

		.size           = 12 * (64*(2*2048)),

	},

	{

		.name           = "File System",

		.offset         = MTDPART_OFS_APPEND,

		.size           = MTDPART_SIZ_FULL,

	},

};



static int igep2_onenand_setup(void __iomem *onenand_base, int freq)

{

       /* nothing is required to be setup for onenand as of now */

       return 0;

}



static struct omap_onenand_platform_data igep2_onenand_data = {

	.parts = igep2_onenand_partitions,

	.nr_parts = ARRAY_SIZE(igep2_onenand_partitions),

	.onenand_setup = igep2_onenand_setup,

	.dma_channel	= -1,	/* disable DMA in OMAP OneNAND driver */

};



static struct platform_device igep2_onenand_device = {

	.name		= "omap2-onenand",

	.id		= -1,

	.dev = {

		.platform_data = &igep2_onenand_data,

	},

};



void __init igep2_flash_init(void)

{

	u8		cs = 0;

	u8		onenandcs = GPMC_CS_NUM + 1;



	while (cs < GPMC_CS_NUM) {

		u32 ret = 0;

		ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);



		/* Check if NAND/oneNAND is configured */

		if ((ret & 0xC00) == 0x800)

			/* NAND found */

			pr_err("IGEP v2: Unsupported NAND found\n");

		else {

			ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);

			if ((ret & 0x3F) == (ONENAND_MAP >> 24))

				/* ONENAND found */

				onenandcs = cs;

		}

		cs++;

	}

	if (onenandcs > GPMC_CS_NUM) {

		pr_err("IGEP v2: Unable to find configuration in GPMC\n");

		return;

	}



	if (onenandcs < GPMC_CS_NUM) {

		igep2_onenand_data.cs = onenandcs;

		if (platform_device_register(&igep2_onenand_device) < 0)

			pr_err("IGEP v2: Unable to register OneNAND device\n");

	}

}



#else

void __init igep2_flash_init(void) {}

#endif



#if defined(CONFIG_SMSC911X) || defined(CONFIG_SMSC911X_MODULE)



#include <linux/smsc911x.h>
@@ -314,6 +414,7 @@ static void __init igep2_init(void) 
	usb_musb_init();

	usb_ehci_init(&ehci_pdata);



	igep2_flash_init();

	igep2_display_init();

	igep2_init_smsc911x();