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>
diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig
index 43bb958..8954828 100644
--- a/arch/arm/mach-davinci/Kconfig
+++ b/arch/arm/mach-davinci/Kconfig
@@ -122,6 +122,11 @@
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 ccf66c7..ea9bc25 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 @@
}
}
+#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 @@
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 @@
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();