Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

ARM: OMAP3: igep0020: Add support for Micron NAND Flash storage memory

Browse source 
IGEP-based boards can have two different flash memories, a OneNAND or
a NAND device. The boot configuration pins (sys_boot) are used to
specify which memory is available.

Also, this patch removes unnecesary code for registering the OneNAND.

Signed-off-by: Javier Martinez Canillas <javier@dowhile0.org>
Acked-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Tested-by: Enric Balletbo i Serra <eballetbo@gmail.com>
[tony@atomide.com: fixed up a minor checkpatch warning]
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Javier Martinez Canillas 2012-05-09 14:19:14 -07:00 committed by Tony Lindgren
parent 8259573b32
commit a42cf2c6c6
1 changed files with 30 additions and 42 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

72
arch/arm/mach-omap2/board-igep0020.c
View file

@ -24,6 +24,8 @@
#include <linux/i2c/twl.h>
#include <linux/mmc/host.h>
#include <linux/mtd/nand.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@ -39,6 +41,8 @@
#include "hsmmc.h"
#include "sdram-numonyx-m65kxxxxam.h"
#include "common-board-devices.h"
#include "board-flash.h"
#include "control.h"
#define IGEP2_SMSC911X_CS 5
#define IGEP2_SMSC911X_GPIO 176
@ -60,6 +64,10 @@
#define IGEP3_GPIO_LED1_RED 16
#define IGEP3_GPIO_USBH_NRESET 183
#define IGEP_SYSBOOT_MASK 0x1f
#define IGEP_SYSBOOT_NAND 0x0f
#define IGEP_SYSBOOT_ONENAND 0x10
/*
* IGEP2 Hardware Revision Table
*
@ -110,8 +118,10 @@ static void __init igep2_get_revision(void)
gpio_free(IGEP2_GPIO_LED1_RED);
}
#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
defined(CONFIG_MTD_ONENAND_OMAP2_MODULE)
#if defined(CONFIG_MTD_ONENAND_OMAP2) || \
defined(CONFIG_MTD_ONENAND_OMAP2_MODULE) || \
defined(CONFIG_MTD_NAND_OMAP2) || \
defined(CONFIG_MTD_NAND_OMAP2_MODULE)
#define ONENAND_MAP 0x20000000
@ -123,7 +133,7 @@ static void __init igep2_get_revision(void)
* So MTD regards it as 4KiB page size and 256KiB block size 64*(2*2048)
*/
static struct mtd_partition igep_onenand_partitions[] = {
static struct mtd_partition igep_flash_partitions[] = {
{
.name = "X-Loader",
.offset = 0,
@ -151,50 +161,28 @@ static struct mtd_partition igep_onenand_partitions[] = {
},
};
static struct omap_onenand_platform_data igep_onenand_data = {
.parts = igep_onenand_partitions,
.nr_parts = ARRAY_SIZE(igep_onenand_partitions),
.dma_channel = -1, /* disable DMA in OMAP OneNAND driver */
};
static struct platform_device igep_onenand_device = {
.name = "omap2-onenand",
.id = -1,
.dev = {
.platform_data = &igep_onenand_data,
},
};
static inline u32 igep_get_sysboot_value(void)
{
return omap_ctrl_readl(OMAP343X_CONTROL_STATUS) & IGEP_SYSBOOT_MASK;
}
static void __init igep_flash_init(void)
{
u8 cs = 0;
u8 onenandcs = GPMC_CS_NUM + 1;
u32 mux;
mux = igep_get_sysboot_value();
for (cs = 0; cs < GPMC_CS_NUM; cs++) {
u32 ret;
ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
/* Check if NAND/oneNAND is configured */
if ((ret & 0xC00) == 0x800)
/* NAND found */
pr_err("IGEP: Unsupported NAND found\n");
else {
ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
if ((ret & 0x3F) == (ONENAND_MAP >> 24))
/* ONENAND found */
onenandcs = cs;
}
if (mux == IGEP_SYSBOOT_NAND) {
pr_info("IGEP: initializing NAND memory device\n");
board_nand_init(igep_flash_partitions,
ARRAY_SIZE(igep_flash_partitions),
0, NAND_BUSWIDTH_16);
} else if (mux == IGEP_SYSBOOT_ONENAND) {
pr_info("IGEP: initializing OneNAND memory device\n");
board_onenand_init(igep_flash_partitions,
ARRAY_SIZE(igep_flash_partitions), 0);
} else {
pr_err("IGEP: Flash: unsupported sysboot sequence found\n");
}
if (onenandcs > GPMC_CS_NUM) {
pr_err("IGEP: Unable to find configuration in GPMC\n");
return;
}
igep_onenand_data.cs = onenandcs;
if (platform_device_register(&igep_onenand_device) < 0)
pr_err("IGEP: Unable to register OneNAND device\n");
}
#else