Enable Nand suport on the OMAP3EVM.
Signed-off-by: Sriramakrishnan <[email protected]>
---
This patch has been generated against the tip of for-next branch.
arch/arm/configs/omap3_evm_defconfig | 2 +
arch/arm/mach-omap2/board-omap3evm.c | 102 ++++++++++++++++++++++++++++++++++
2 files changed, 104 insertions(+), 0 deletions(-)
diff --git a/arch/arm/configs/omap3_evm_defconfig
b/arch/arm/configs/omap3_evm_defconfig
index d5ff477..5675281 100644
--- a/arch/arm/configs/omap3_evm_defconfig
+++ b/arch/arm/configs/omap3_evm_defconfig
@@ -516,6 +516,8 @@ CONFIG_MTD_NAND=y
# CONFIG_MTD_NAND_ECC_SMC is not set
# CONFIG_MTD_NAND_MUSEUM_IDS is not set
# CONFIG_MTD_NAND_GPIO is not set
+CONFIG_MTD_NAND_OMAP2=y
+# CONFIG_MTD_NAND_OMAP_PREFETCH is not set
CONFIG_MTD_NAND_IDS=y
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_NANDSIM is not set
diff --git a/arch/arm/mach-omap2/board-omap3evm.c
b/arch/arm/mach-omap2/board-omap3evm.c
index 5d2310e..91772f2 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -27,6 +27,11 @@
#include <linux/i2c/twl4030.h>
#include <linux/usb/otg.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand.h>
+
+
#include <linux/regulator/machine.h>
#include <mach/hardware.h>
@@ -36,6 +41,8 @@
#include <plat/board.h>
#include <plat/mux.h>
+#include <plat/gpmc.h>
+#include <plat/nand.h>
#include <plat/usb.h>
#include <plat/common.h>
#include <plat/mcspi.h>
@@ -44,6 +51,11 @@
#include "sdram-micron-mt46h32m32lf-6.h"
#include "mmc-twl4030.h"
+#define GPMC_CS0_BASE 0x60
+#define GPMC_CS_SIZE 0x30
+
+#define NAND_BLOCK_SIZE SZ_128K
+
#define OMAP3_EVM_TS_GPIO 175
#define OMAP3EVM_ETHR_START 0x2c000000
@@ -51,6 +63,95 @@
#define OMAP3EVM_ETHR_GPIO_IRQ 176
#define OMAP3EVM_SMC911X_CS 5
+
+static struct mtd_partition omap3evm_nand_partitions[] = {
+ /* All the partition sizes are listed in terms of NAND block size */
+ {
+ .name = "xloader-nand",
+ .offset = 0,
+ .size = 4*(SZ_128K),
+ .mask_flags = MTD_WRITEABLE
+ },
+ {
+ .name = "uboot-nand",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 14*(SZ_128K),
+ .mask_flags = MTD_WRITEABLE
+ },
+ {
+ .name = "params-nand",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 2*(SZ_128K)
+ },
+ {
+ .name = "linux-nand",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 40*(SZ_128K)
+ },
+ {
+ .name = "jffs2-nand",
+ .size = MTDPART_SIZ_FULL,
+ .offset = MTDPART_OFS_APPEND,
+ },
+};
+
+static struct omap_nand_platform_data omap3evm_nand_data = {
+ .parts = omap3evm_nand_partitions,
+ .nr_parts = ARRAY_SIZE(omap3evm_nand_partitions),
+ .nand_setup = NULL,
+ .dma_channel = -1, /* disable DMA in OMAP NAND driver */
+ .dev_ready = NULL,
+};
+
+static struct resource omap3evm_nand_resource = {
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device omap3evm_nand_device = {
+ .name = "omap2-nand",
+ .id = 0,
+ .dev = {
+ .platform_data = &omap3evm_nand_data,
+ },
+ .num_resources = 1,
+ .resource = &omap3evm_nand_resource,
+};
+
+void __init omap3evm_flash_init(void)
+{
+ u8 cs = 0;
+ u8 nandcs = GPMC_CS_NUM + 1;
+ u32 gpmc_base_add = OMAP34XX_GPMC_VIRT;
+
+ while (cs < GPMC_CS_NUM) {
+ u32 ret = 0;
+ ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
+
+ if ((ret & 0xC00) == 0x800) {
+ /* Found it!! */
+ 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) {
+ omap3evm_nand_data.cs = nandcs;
+ omap3evm_nand_data.gpmc_cs_baseaddr = (void *)(gpmc_base_add +
+ GPMC_CS0_BASE + nandcs*GPMC_CS_SIZE);
+ omap3evm_nand_data.gpmc_baseaddr = (void *) (gpmc_base_add);
+
+ if (platform_device_register(&omap3evm_nand_device) < 0) {
+ printk(KERN_ERR "Unable to register NAND device\n");
+ }
+ }
+}
+
static struct resource omap3evm_smc911x_resources[] = {
[0] = {
.start = OMAP3EVM_ETHR_START,
@@ -358,6 +459,7 @@ static void __init omap3_evm_init(void)
usb_nop_xceiv_register();
#endif
usb_musb_init();
+ omap3evm_flash_init();
ads7846_dev_init();
}
--
1.6.2.4
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