Blackfin arch: use the generic platform nand driver to support nand flash on... (fc68911e) · Commits · 戴 / test

arch/blackfin/mach-bf537/boards/stamp.c

+86 −0

Original line number	Diff line number	Diff line
		@@ -29,9 +29,12 @@
		*/

		#include <linux/device.h>
		#include <linux/kernel.h>
		#include <linux/platform_device.h>
		#include <linux/mtd/mtd.h>
		#include <linux/mtd/nand.h>
		#include <linux/mtd/partitions.h>
		#include <linux/mtd/plat-ram.h>
		#include <linux/mtd/physmap.h>
		#include <linux/spi/spi.h>
		#include <linux/spi/flash.h>
		@@ -355,6 +358,84 @@ static struct platform_device net2272_bfin_device = {
		};
		#endif

		#if defined(CONFIG_MTD_NAND_PLATFORM) \|\| defined(CONFIG_MTD_NAND_PLATFORM_MODULE)
		#ifdef CONFIG_MTD_PARTITIONS
		const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL };

		static struct mtd_partition bfin_plat_nand_partitions[] = {
		{
		.name = "linux kernel",
		.size = 0x400000,
		.offset = 0,
		}, {
		.name = "file system",
		.size = MTDPART_SIZ_FULL,
		.offset = MTDPART_OFS_APPEND,
		},
		};
		#endif

		#define BFIN_NAND_PLAT_CLE 2
		#define BFIN_NAND_PLAT_ALE 1
		static void bfin_plat_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
		{
		struct nand_chip *this = mtd->priv;

		if (cmd == NAND_CMD_NONE)
		return;

		if (ctrl & NAND_CLE)
		writeb(cmd, this->IO_ADDR_W + (1 << BFIN_NAND_PLAT_CLE));
		else
		writeb(cmd, this->IO_ADDR_W + (1 << BFIN_NAND_PLAT_ALE));
		}

		#define BFIN_NAND_PLAT_READY GPIO_PF3
		static int bfin_plat_nand_dev_ready(struct mtd_info *mtd)
		{
		return gpio_get_value(BFIN_NAND_PLAT_READY);
		}

		static struct platform_nand_data bfin_plat_nand_data = {
		.chip = {
		.chip_delay = 30,
		#ifdef CONFIG_MTD_PARTITIONS
		.part_probe_types = part_probes,
		.partitions = bfin_plat_nand_partitions,
		.nr_partitions = ARRAY_SIZE(bfin_plat_nand_partitions),
		#endif
		},
		.ctrl = {
		.cmd_ctrl = bfin_plat_nand_cmd_ctrl,
		.dev_ready = bfin_plat_nand_dev_ready,
		},
		};

		#define MAX(x, y) (x > y ? x : y)
		static struct resource bfin_plat_nand_resources = {
		.start = 0x20212000,
		.end = 0x20212000 + (1 << MAX(BFIN_NAND_PLAT_CLE, BFIN_NAND_PLAT_ALE)),
		.flags = IORESOURCE_IO,
		};

		static struct platform_device bfin_async_nand_device = {
		.name = "gen_nand",
		.id = -1,
		.num_resources = 1,
		.resource = &bfin_plat_nand_resources,
		.dev = {
		.platform_data = &bfin_plat_nand_data,
		},
		};

		static void bfin_plat_nand_init(void)
		{
		gpio_request(BFIN_NAND_PLAT_READY, "bfin_nand_plat");
		}
		#else
		static void bfin_plat_nand_init(void) {}
		#endif

		#if defined(CONFIG_MTD_PHYSMAP) \|\| defined(CONFIG_MTD_PHYSMAP_MODULE)
		static struct mtd_partition stamp_partitions[] = {
		{
		@@ -922,6 +1003,10 @@ static struct platform_device *stamp_devices[] __initdata = {

		&bfin_gpios_device,

		#if defined(CONFIG_MTD_NAND_PLATFORM) \|\| defined(CONFIG_MTD_NAND_PLATFORM_MODULE)
		&bfin_async_nand_device,
		#endif

		#if defined(CONFIG_MTD_PHYSMAP) \|\| defined(CONFIG_MTD_PHYSMAP_MODULE)
		&stamp_flash_device,
		#endif
		@@ -936,6 +1021,7 @@ static int __init stamp_init(void)
		ARRAY_SIZE(bfin_i2c_board_info));
		#endif

		bfin_plat_nand_init();
		platform_add_devices(stamp_devices, ARRAY_SIZE(stamp_devices));
		spi_register_board_info(bfin_spi_board_info, ARRAY_SIZE(bfin_spi_board_info));

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