This patch enables the nand support for omap2evm board
Signed-off-by: Arun KS <arunks@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/board-omap2evm.c | 96 ++++++++++++++++++++++++++++++++++
1 files changed, 96 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap2evm.c
b/arch/arm/mach-omap2/board-omap2evm.c
index 4188222..0dc3205 100644
--- a/arch/arm/mach-omap2/board-omap2evm.c
+++ b/arch/arm/mach-omap2/board-omap2evm.c
@@ -19,6 +19,9 @@
#include <linux/io.h>
#include <linux/input.h>
#include <linux/i2c/twl4030.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -30,6 +33,62 @@
#include <mach/common.h>
#include <mach/hsmmc.h>
#include <mach/keypad.h>
+#include <mach/gpmc.h>
+#include <mach/nand.h>
+
+#define GPMC_CS0_BASE 0x60
+#define GPMC_CS_SIZE 0x30
+
+static struct mtd_partition nand_partitions[] = {
+ {
+ .name = "X-Loader",
+ .offset = 0,
+ .size = 4*(64*2048), /* 0-3 blks reserved.
+ Mandated by ROM code */
+ .mask_flags = MTD_WRITEABLE /* force read-only */
+ },
+ {
+ .name = "U-Boot",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 4*(64*2048),
+ .mask_flags = MTD_WRITEABLE /* force read-only */
+ },
+ {
+ .name = "U-Boot Environment",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 2*(64*2048),
+ },
+ {
+ .name = "Kernel",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 32*(64*2048), /* 4*1M */
+ },
+ {
+ .name = "File System",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL,
+ },
+};
+
+static struct omap_nand_platform_data omap2evm_nand_data = {
+ .parts = nand_partitions,
+ .nr_parts = ARRAY_SIZE(nand_partitions),
+ .dma_channel = -1, /* disable DMA in OMAP OneNAND driver */
+};
+
+static struct resource omap2evm_nand_resource = {
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device omap2evm_nand_device = {
+ .name = "omap2-nand",
+ .id = -1,
+ .dev = {
+ .platform_data = &omap2evm_nand_data,
+ },
+ .num_resources = 1,
+ .resource = &omap2evm_nand_resource,
+};
static struct resource omap2evm_smc911x_resources[] = {
[0] = {
@@ -152,6 +211,42 @@ static struct platform_device
*omap2_evm_devices[] __initdata = {
&omap2evm_smc911x_device,
&omap2evm_kp_device,
};
+void __init omap2evm_flash_init(void)
+{
+ u8 cs = 0;
+ u8 nandcs = GPMC_CS_NUM + 1;
+
+ u32 gpmc_base_add = OMAP243X_GPMC_VIRT;
+
+ /* find out the chip-select on which NAND exists */
+ while (cs < GPMC_CS_NUM) {
+ u32 ret = 0;
+ ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
+
+ if ((ret & 0xC00) == 0x800) {
+ printk(KERN_INFO "Found NAND on CS%d\n", cs);
+ if (nandcs > GPMC_CS_NUM)
+ nandcs = cs;
+ }
+ cs++;
+ }
+
+ if (nandcs > GPMC_CS_NUM) {
+ printk(KERN_INFO "NAND: Unable to find configuration "
+ "in GPMC\n ");
+ return;
+ }
+ if (nandcs < GPMC_CS_NUM) {
+ omap2evm_nand_data.cs = nandcs;
+ omap2evm_nand_data.gpmc_cs_baseaddr = (void *)
+ (gpmc_base_add + GPMC_CS0_BASE + nandcs * GPMC_CS_SIZE);
+ omap2evm_nand_data.gpmc_baseaddr = (void *) (gpmc_base_add);
+
+ printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
+ if (platform_device_register(&omap2evm_nand_device) < 0)
+ printk(KERN_ERR "Unable to register NAND device\n");
+ }
+}
static void __init omap2_evm_init(void)
{
@@ -160,6 +255,7 @@ static void __init omap2_evm_init(void)
omap_board_config_size = ARRAY_SIZE(omap2_evm_config);
omap_serial_init();
hsmmc_init();
+ omap2evm_flash_init();
}
static void __init omap2_evm_map_io(void)
--
1.5.3.4
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