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Blackfin arch: use the generic platform nand driver to support nand flash on bf53x board which do not have on-chip nand flash controller 

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger 2008-06-25 11:41:42 +08:00 committed by Bryan Wu
parent bce7f793da
commit fc68911ee3
1 changed files with 86 additions and 0 deletions
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86
arch/blackfin/mach-bf537/boards/stamp.c
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@ -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));