davinci: dm365: add NAND support to EVM board

Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index e62d1ab3bb2a..3675e844b9b1 100644
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -20,6 +20,9 @@
 #include <linux/io.h>
 #include <linux/clk.h>
 #include <linux/i2c/at24.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand.h>
 #include <asm/setup.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -34,10 +37,84 @@
 #include <mach/serial.h>
 #include <mach/common.h>
 #include <mach/mmc.h>
+#include <mach/nand.h>
+
+#define DM365_ASYNC_EMIF_CONTROL_BASE   0x01d10000
+#define DM365_ASYNC_EMIF_DATA_CE0_BASE  0x02000000
 
 #define DM365_EVM_PHY_MASK              (0x2)
 #define DM365_EVM_MDIO_FREQUENCY        (2200000) /* PHY bus frequency */
 
+/* NOTE:  this is geared for the standard config, with a socketed
+ * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors.  If you
+ * swap chips with a different block size, partitioning will
+ * need to be changed. This NAND chip MT29F16G08FAA is the default
+ * NAND shipped with the Spectrum Digital DM365 EVM
+ */
+#define NAND_BLOCK_SIZE         SZ_128K
+
+static struct mtd_partition davinci_nand_partitions[] = {
+        {
+                /* UBL (a few copies) plus U-Boot */
+                .name           = "bootloader",
+                .offset         = 0,
+                .size           = 28 * NAND_BLOCK_SIZE,
+                .mask_flags     = MTD_WRITEABLE, /* force read-only */
+        }, {
+                /* U-Boot environment */
+                .name           = "params",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = 2 * NAND_BLOCK_SIZE,
+                .mask_flags     = 0,
+        }, {
+                .name           = "kernel",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_4M,
+                .mask_flags     = 0,
+        }, {
+                .name           = "filesystem1",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_512M,
+                .mask_flags     = 0,
+        }, {
+                .name           = "filesystem2",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = MTDPART_SIZ_FULL,
+                .mask_flags     = 0,
+        }
+        /* two blocks with bad block table (and mirror) at the end */
+};
+
+static struct davinci_nand_pdata davinci_nand_data = {
+        .mask_chipsel           = BIT(14),
+        .parts                  = davinci_nand_partitions,
+        .nr_parts               = ARRAY_SIZE(davinci_nand_partitions),
+        .ecc_mode               = NAND_ECC_HW,
+        .options                = NAND_USE_FLASH_BBT,
+};
+
+static struct resource davinci_nand_resources[] = {
+        {
+                .start          = DM365_ASYNC_EMIF_DATA_CE0_BASE,
+                .end            = DM365_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
+                .flags          = IORESOURCE_MEM,
+        }, {
+                .start          = DM365_ASYNC_EMIF_CONTROL_BASE,
+                .end            = DM365_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
+                .flags          = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device davinci_nand_device = {
+        .name                   = "davinci_nand",
+        .id                     = 0,
+        .num_resources          = ARRAY_SIZE(davinci_nand_resources),
+        .resource               = davinci_nand_resources,
+        .dev                    = {
+                .platform_data  = &davinci_nand_data,
+        },
+};
+
 static struct at24_platform_data eeprom_info = {
         .byte_len       = (256*1024) / 8,
         .page_size      = 64,
@@ -122,6 +199,10 @@ static void __init evm_init_i2c(void)
         i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
 }
 
+static struct platform_device *dm365_evm_devices[] __initdata = {
+        &davinci_nand_device,
+};
+
 static struct davinci_uart_config uart_config __initdata = {
         .enabled_uarts = (1 << 0),
 };
@@ -135,6 +216,9 @@ static __init void dm365_evm_init(void)
 {
         struct davinci_soc_info *soc_info = &davinci_soc_info;
 
+        platform_add_devices(dm365_evm_devices,
+                                ARRAY_SIZE(dm365_evm_devices));
+
         evm_init_i2c();
         davinci_serial_init(&uart_config);