Add nand flash init code for am3517evm.
Signed-off-by: Stanley.Miao <[email protected]>
---
arch/arm/mach-omap2/board-am3517evm.c | 84 +++++++++++++++++++++++++++++++++
1 files changed, 84 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-am3517evm.c
b/arch/arm/mach-omap2/board-am3517evm.c
index 879c13f..a76ff11 100644
--- a/arch/arm/mach-omap2/board-am3517evm.c
+++ b/arch/arm/mach-omap2/board-am3517evm.c
@@ -23,6 +23,9 @@
#include <linux/davinci_emac.h>
#include <linux/i2c/pca953x.h>
#include <linux/regulator/machine.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand.h>
#include <mach/hardware.h>
#include <mach/am35xx.h>
@@ -35,6 +38,8 @@
#include <plat/control.h>
#include <plat/usb.h>
#include <plat/display.h>
+#include <plat/nand.h>
+#include <plat/gpmc.h>
#include "mux.h"
@@ -42,6 +47,84 @@
#define LCD_PANEL_BKLIGHT_PWR 182
#define LCD_PANEL_PWM 181
+#define GPMC_CS0_BASE 0x60
+#define GPMC_CS_SIZE 0x30
+
+#define NAND_BLOCK_SIZE SZ_128K
+
+static struct mtd_partition am3517evm_nand_partitions[] = {
+ /* All the partition sizes are listed in terms of NAND block size */
+ {
+ .name = "xloader",
+ .offset = 0,
+ .size = 4 * (SZ_128K),
+ .mask_flags = MTD_WRITEABLE
+ },
+ {
+ .name = "uboot",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 14 * (SZ_128K),
+ .mask_flags = MTD_WRITEABLE
+ },
+ {
+ .name = "uboot-params",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 2 * (SZ_128K)
+ },
+ {
+ .name = "linux-kernel",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 40 * (SZ_128K)
+ },
+ {
+ .name = "rootfs",
+ .size = MTDPART_SIZ_FULL,
+ .offset = MTDPART_OFS_APPEND,
+ },
+};
+
+static struct omap_nand_platform_data am3517evm_nand_data = {
+ .parts = am3517evm_nand_partitions,
+ .nr_parts = ARRAY_SIZE(am3517evm_nand_partitions),
+ .nand_setup = NULL,
+ .dma_channel = -1, /* disable DMA in OMAP NAND driver */
+ .devsize = 1,
+ .dev_ready = NULL,
+};
+
+void __init am3517evm_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) {
+ am3517evm_nand_data.cs = nandcs;
+ am3517evm_nand_data.gpmc_cs_baseaddr = (void *)(gpmc_base_add +
+ GPMC_CS0_BASE + nandcs*GPMC_CS_SIZE);
+ am3517evm_nand_data.gpmc_baseaddr = (void *) (gpmc_base_add);
+ gpmc_nand_init(&am3517evm_nand_data);
+ }
+}
+
+
#define AM35XX_EVM_PHY_MASK (0xF)
#define AM35XX_EVM_MDIO_FREQUENCY (1000000) /*PHY bus frequency */
@@ -539,6 +622,7 @@ static void __init am3517_evm_init(void)
ARRAY_SIZE(am3517_evm_devices));
omap_serial_init();
+ am3517evm_flash_init();
/* Configure GPIO for EHCI port */
omap_mux_init_gpio(57, OMAP_PIN_OUTPUT);
--
1.5.4.3
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