* Arun KS <arunks@xxxxxxxxxxxxxxxxxxxx> [080823 02:18]:
> This patch adds nand support to omap2evm board
Pushing today.
Tony
>
> Signed-off-by: Arun KS <arunks@xxxxxxxxxxxxxxxxxxxx>
> ---
> arch/arm/mach-omap2/board-omap2evm.c | 107 ++++++++++++++++++++++++++++++++++
> 1 files changed, 107 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/board-omap2evm.c
> b/arch/arm/mach-omap2/board-omap2evm.c
> index 4188222..138e80c 100644
> --- 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)
> --
> 1.5.3.4
> --
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