OMAP2EVM : Add nand support

This patch adds nand support to omap2evm board

Signed-off-by: Arun KS <arunks@mistralsolutions.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap2/board-omap2evm.c b/arch/arm/mach-omap2/board-omap2evm.c
index 41882222376f3a15be65d9bf02f7fade5ce94c03..138e80c33fc2225f971942c1812ed23c2217838d 100644 (file)
--- 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)