This patch adds nand support to omap2evm board
Signed-off-by: Arun KS <arunks@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/mach-omap2/board-omap2evm.c | 107 ++++++++++++++++++++++++++++++++++
1 files changed, 107 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap2evm.c
b/arch/arm/mach-omap2/board-omap2evm.c
index 4188222..138e80c 100644
--- a/arch/arm/mach-omap2/board-omap2evm.c
+++ b/arch/arm/mach-omap2/board-omap2evm.c
@@ -19,17 +19,123 @@
#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>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
+#include <asm/mach/flash.h>
#include <mach/gpio.h>
#include <mach/board.h>
#include <mach/common.h>
#include <mach/hsmmc.h>
#include <mach/keypad.h>
+#include <mach/gpmc.h>
+#include <mach/nand.h>
+
+#define GPMC_OFF_CONFIG1_0 0x60
+
+static struct mtd_partition omap2evm_nand_partitions[] = {
+ {
+ .name = "X-Loader",
+ .offset = 0,
+ .size = 1 * (64 * 2048),
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ },
+ {
+ .name = "U-Boot",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 3 * (64 * 2048),
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ },
+ {
+ .name = "U-Boot Environment",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 1 * (64 * 2048),
+ },
+ {
+ .name = "Kernel",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 16 * (64 * 2048), /* 2MB */
+ },
+ {
+ .name = "Ramdisk",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 32 * (64 * 2048), /* 4MB */
+ },
+ {
+ .name = "Filesystem",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL,
+ }
+};
+
+static struct omap_nand_platform_data omap2evm_nand_data = {
+ .parts = omap2evm_nand_partitions,
+ .nr_parts = ARRAY_SIZE(omap2evm_nand_partitions),
+ .dma_channel = -1, /* disable DMA in OMAP NAND 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,
+};
+
+void __init omap2evm_flash_init(void)
+{
+ void __iomem *gpmc_base_add, *gpmc_cs_base_add;
+ unsigned char cs = 0;
+
+ gpmc_base_add = (__force void __iomem *)OMAP243X_GPMC_VIRT;
+ while (cs < GPMC_CS_NUM) {
+ int ret = 0;
+
+ /* Each GPMC set for a single CS is at offset 0x30 */
+ gpmc_cs_base_add = (gpmc_base_add + GPMC_OFF_CONFIG1_0 +
+ (cs * 0x30));
+
+ /* xloader/Uboot would have programmed the NAND
+ * base address for us This is a ugly hack. The proper
+ * way of doing this is to pass the setup of u-boot up
+ * to kernel using kernel params - something on the
+ * lines of machineID. Check if Nand is
+ * configured */
+ ret = __raw_readl(gpmc_cs_base_add + GPMC_CS_CONFIG1);
+ if ((ret & 0xC00) == (0x800)) {
+ /* Found it!! */
+ printk(KERN_INFO "NAND: Found NAND on CS %d \n", cs);
+ break;
+ }
+ cs++;
+ }
+ if (cs >= GPMC_CS_NUM) {
+ printk(KERN_INFO "MTD: Unable to find MTD configuration in "
+ "GPMC - not registering.\n");
+ return;
+ }
+
+ omap2evm_nand_data.cs = cs;
+ omap2evm_nand_data.gpmc_cs_baseaddr = gpmc_cs_base_add;
+ omap2evm_nand_data.gpmc_baseaddr = gpmc_base_add;
+
+ if (platform_device_register(&omap2evm_nand_device) < 0) {
+ printk(KERN_ERR "Unable to register NAND device\n");
+ return;
+ }
+}
static struct resource omap2evm_smc911x_resources[] = {
[0] = {
@@ -160,6 +266,7 @@ 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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