davinci: Add NAND support for DA830/OMAP-L137 EVM platform

Add support for NAND flash parts on the DA830/OMAP-L137 EVM
User Interface board.  This includes overriding the default
bad block tables used by the davinci_nand driver.

Signed-off-by: David A. Griego <dgriego@mvista.com>
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

2 files changed, 136 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig
index 43bb9587b571..89548287ca0f 100644
--- a/arch/arm/mach-davinci/Kconfig
+++ b/arch/arm/mach-davinci/Kconfig
@@ -122,6 +122,11 @@ config DA830_UI_LCD
           Say Y here to use the LCD as a framebuffer or simple character
           display.
 
+config DA830_UI_NAND
+        bool "NAND flash"
+        help
+          Say Y here to use the NAND flash.  Do not forget to setup
+          the switch correctly.
 endchoice
 
 config MACH_DAVINCI_DA850_EVM
diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c
index ccf66c755a7f..ea9bc25e9288 100644
--- a/arch/arm/mach-davinci/board-da830-evm.c
+++ b/arch/arm/mach-davinci/board-da830-evm.c
@@ -14,21 +14,28 @@
 #include <linux/console.h>
 #include <linux/interrupt.h>
 #include <linux/gpio.h>
+#include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/i2c/pcf857x.h>
 #include <linux/i2c/at24.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 
 #include <mach/cp_intc.h>
 #include <mach/mux.h>
+#include <mach/nand.h>
 #include <mach/da8xx.h>
 #include <mach/usb.h>
 
 #define DA830_EVM_PHY_MASK              0x0
 #define DA830_EVM_MDIO_FREQUENCY        2200000 /* PHY bus frequency */
 
+#define DA830_EMIF25_ASYNC_DATA_CE3_BASE        0x62000000
+#define DA830_EMIF25_CONTROL_BASE               0x68000000
+
 static struct at24_platform_data da830_evm_i2c_eeprom_info = {
         .byte_len       = SZ_256K / 8,
         .page_size      = 64,
@@ -313,6 +320,118 @@ static inline void da830_evm_init_mmc(void)
         }
 }
 
+#ifdef CONFIG_DA830_UI_NAND
+static struct mtd_partition da830_evm_nand_partitions[] = {
+        /* bootloader (U-Boot, etc) in first sector */
+        [0] = {
+                .name           = "bootloader",
+                .offset         = 0,
+                .size           = SZ_128K,
+                .mask_flags     = MTD_WRITEABLE,        /* force read-only */
+        },
+        /* bootloader params in the next sector */
+        [1] = {
+                .name           = "params",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_128K,
+                .mask_flags     = MTD_WRITEABLE,        /* force read-only */
+        },
+        /* kernel */
+        [2] = {
+                .name           = "kernel",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_2M,
+                .mask_flags     = 0,
+        },
+        /* file system */
+        [3] = {
+                .name           = "filesystem",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = MTDPART_SIZ_FULL,
+                .mask_flags     = 0,
+        }
+};
+
+/* flash bbt decriptors */
+static uint8_t da830_evm_nand_bbt_pattern[] = { 'B', 'b', 't', '0' };
+static uint8_t da830_evm_nand_mirror_pattern[] = { '1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr da830_evm_nand_bbt_main_descr = {
+        .options        = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE |
+                          NAND_BBT_WRITE | NAND_BBT_2BIT |
+                          NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+        .offs           = 2,
+        .len            = 4,
+        .veroffs        = 16,
+        .maxblocks      = 4,
+        .pattern        = da830_evm_nand_bbt_pattern
+};
+
+static struct nand_bbt_descr da830_evm_nand_bbt_mirror_descr = {
+        .options        = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE |
+                          NAND_BBT_WRITE | NAND_BBT_2BIT |
+                          NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+        .offs           = 2,
+        .len            = 4,
+        .veroffs        = 16,
+        .maxblocks      = 4,
+        .pattern        = da830_evm_nand_mirror_pattern
+};
+
+static struct davinci_nand_pdata da830_evm_nand_pdata = {
+        .parts          = da830_evm_nand_partitions,
+        .nr_parts       = ARRAY_SIZE(da830_evm_nand_partitions),
+        .ecc_mode       = NAND_ECC_HW,
+        .ecc_bits       = 4,
+        .options        = NAND_USE_FLASH_BBT,
+        .bbt_td         = &da830_evm_nand_bbt_main_descr,
+        .bbt_md         = &da830_evm_nand_bbt_mirror_descr,
+};
+
+static struct resource da830_evm_nand_resources[] = {
+        [0] = {         /* First memory resource is NAND I/O window */
+                .start  = DA830_EMIF25_ASYNC_DATA_CE3_BASE,
+                .end    = DA830_EMIF25_ASYNC_DATA_CE3_BASE + PAGE_SIZE - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {         /* Second memory resource is AEMIF control registers */
+                .start  = DA830_EMIF25_CONTROL_BASE,
+                .end    = DA830_EMIF25_CONTROL_BASE + SZ_32K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device da830_evm_nand_device = {
+        .name           = "davinci_nand",
+        .id             = 1,
+        .dev            = {
+                .platform_data  = &da830_evm_nand_pdata,
+        },
+        .num_resources  = ARRAY_SIZE(da830_evm_nand_resources),
+        .resource       = da830_evm_nand_resources,
+};
+#endif
+
+static struct platform_device *da830_evm_devices[] __initdata = {
+#ifdef CONFIG_DA830_UI_NAND
+        &da830_evm_nand_device,
+#endif
+};
+
+/*
+ * UI board NAND/NOR flashes only use 8-bit data bus.
+ */
+static const short da830_evm_emif25_pins[] = {
+        DA830_EMA_D_0, DA830_EMA_D_1, DA830_EMA_D_2, DA830_EMA_D_3,
+        DA830_EMA_D_4, DA830_EMA_D_5, DA830_EMA_D_6, DA830_EMA_D_7,
+        DA830_EMA_A_0, DA830_EMA_A_1, DA830_EMA_A_2, DA830_EMA_A_3,
+        DA830_EMA_A_4, DA830_EMA_A_5, DA830_EMA_A_6, DA830_EMA_A_7,
+        DA830_EMA_A_8, DA830_EMA_A_9, DA830_EMA_A_10, DA830_EMA_A_11,
+        DA830_EMA_A_12, DA830_EMA_BA_0, DA830_EMA_BA_1, DA830_NEMA_WE,
+        DA830_NEMA_CS_2, DA830_NEMA_CS_3, DA830_NEMA_OE, DA830_EMA_WAIT_0,
+        -1
+};
+
 static __init void da830_evm_init(void)
 {
         struct davinci_soc_info *soc_info = &davinci_soc_info;
@@ -367,6 +486,7 @@ static __init void da830_evm_init(void)
 
         da830_evm_init_mmc();
 
+#ifdef CONFIG_DA830_UI
 #ifdef CONFIG_DA830_UI_LCD
         ret = da8xx_pinmux_setup(da830_lcdcntl_pins);
         if (ret)
@@ -376,6 +496,17 @@ static __init void da830_evm_init(void)
         ret = da8xx_register_lcdc(&sharp_lcd035q3dg01_pdata);
         if (ret)
                 pr_warning("da830_evm_init: lcd setup failed: %d\n", ret);
+#else /* Must be NAND or NOR */
+        ret = da8xx_pinmux_setup(da830_evm_emif25_pins);
+        if (ret)
+                pr_warning("da830_evm_init: emif25 mux setup failed: %d\n",
+                                ret);
+
+        ret = platform_add_devices(da830_evm_devices,
+                        ARRAY_SIZE(da830_evm_devices));
+        if (ret)
+                pr_warning("da830_evm_init: EVM devices not added\n");
+#endif
 #endif
 
         ret = da8xx_register_rtc();