mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 09:02:00 +00:00
mtd: Update ep93xx/ts72xx to use generic platform nand driver
Update the ts72xx platform's nand driver support. This changes the ts72xx platform from using a custom nand driver (ts7250.c) to the generic platform nand driver (plat_nand.c). Tested on TS-7250 with 32MiB NAND. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Tested-by: Matthieu Crapet <mcrapet@gmail.com> Cc: Jesse Off <joff@embeddedARM.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
H Hartley Sweeten
David Woodhouse
parent
de58288d1d
commit
030d2dd450
@ -10,12 +10,16 @@
|
||||
* your option) any later version.
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/m48t86.h>
|
||||
#include <linux/mtd/physmap.h>
|
||||
#include <linux/mtd/nand.h>
|
||||
#include <linux/mtd/partitions.h>
|
||||
|
||||
#include <mach/hardware.h>
|
||||
#include <mach/ts72xx.h>
|
||||
@ -54,92 +58,162 @@ static struct map_desc ts72xx_io_desc[] __initdata = {
|
||||
}
|
||||
};
|
||||
|
||||
static struct map_desc ts72xx_nand_io_desc[] __initdata = {
|
||||
{
|
||||
.virtual = TS72XX_NAND_DATA_VIRT_BASE,
|
||||
.pfn = __phys_to_pfn(TS72XX_NAND1_DATA_PHYS_BASE),
|
||||
.length = TS72XX_NAND_DATA_SIZE,
|
||||
.type = MT_DEVICE,
|
||||
}, {
|
||||
.virtual = TS72XX_NAND_CONTROL_VIRT_BASE,
|
||||
.pfn = __phys_to_pfn(TS72XX_NAND1_CONTROL_PHYS_BASE),
|
||||
.length = TS72XX_NAND_CONTROL_SIZE,
|
||||
.type = MT_DEVICE,
|
||||
}, {
|
||||
.virtual = TS72XX_NAND_BUSY_VIRT_BASE,
|
||||
.pfn = __phys_to_pfn(TS72XX_NAND1_BUSY_PHYS_BASE),
|
||||
.length = TS72XX_NAND_BUSY_SIZE,
|
||||
.type = MT_DEVICE,
|
||||
}
|
||||
};
|
||||
|
||||
static struct map_desc ts72xx_alternate_nand_io_desc[] __initdata = {
|
||||
{
|
||||
.virtual = TS72XX_NAND_DATA_VIRT_BASE,
|
||||
.pfn = __phys_to_pfn(TS72XX_NAND2_DATA_PHYS_BASE),
|
||||
.length = TS72XX_NAND_DATA_SIZE,
|
||||
.type = MT_DEVICE,
|
||||
}, {
|
||||
.virtual = TS72XX_NAND_CONTROL_VIRT_BASE,
|
||||
.pfn = __phys_to_pfn(TS72XX_NAND2_CONTROL_PHYS_BASE),
|
||||
.length = TS72XX_NAND_CONTROL_SIZE,
|
||||
.type = MT_DEVICE,
|
||||
}, {
|
||||
.virtual = TS72XX_NAND_BUSY_VIRT_BASE,
|
||||
.pfn = __phys_to_pfn(TS72XX_NAND2_BUSY_PHYS_BASE),
|
||||
.length = TS72XX_NAND_BUSY_SIZE,
|
||||
.type = MT_DEVICE,
|
||||
}
|
||||
};
|
||||
|
||||
static void __init ts72xx_map_io(void)
|
||||
{
|
||||
ep93xx_map_io();
|
||||
iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
|
||||
}
|
||||
|
||||
/*
|
||||
* The TS-7200 has NOR flash, the other models have NAND flash.
|
||||
*/
|
||||
if (!board_is_ts7200()) {
|
||||
if (is_ts9420_installed()) {
|
||||
iotable_init(ts72xx_alternate_nand_io_desc,
|
||||
ARRAY_SIZE(ts72xx_alternate_nand_io_desc));
|
||||
} else {
|
||||
iotable_init(ts72xx_nand_io_desc,
|
||||
ARRAY_SIZE(ts72xx_nand_io_desc));
|
||||
}
|
||||
|
||||
/*************************************************************************
|
||||
* NAND flash
|
||||
*************************************************************************/
|
||||
#define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
|
||||
#define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
|
||||
|
||||
static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
|
||||
int cmd, unsigned int ctrl)
|
||||
{
|
||||
struct nand_chip *chip = mtd->priv;
|
||||
|
||||
if (ctrl & NAND_CTRL_CHANGE) {
|
||||
void __iomem *addr = chip->IO_ADDR_R;
|
||||
unsigned char bits;
|
||||
|
||||
addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
|
||||
|
||||
bits = __raw_readb(addr) & ~0x07;
|
||||
bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
|
||||
bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
|
||||
bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
|
||||
|
||||
__raw_writeb(bits, addr);
|
||||
}
|
||||
|
||||
if (cmd != NAND_CMD_NONE)
|
||||
__raw_writeb(cmd, chip->IO_ADDR_W);
|
||||
}
|
||||
|
||||
static int ts72xx_nand_device_ready(struct mtd_info *mtd)
|
||||
{
|
||||
struct nand_chip *chip = mtd->priv;
|
||||
void __iomem *addr = chip->IO_ADDR_R;
|
||||
|
||||
addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
|
||||
|
||||
return !!(__raw_readb(addr) & 0x20);
|
||||
}
|
||||
|
||||
static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL };
|
||||
|
||||
#define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
|
||||
#define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
|
||||
|
||||
static struct mtd_partition ts72xx_nand_parts[] = {
|
||||
{
|
||||
.name = "TS-BOOTROM",
|
||||
.offset = 0,
|
||||
.size = TS72XX_BOOTROM_PART_SIZE,
|
||||
.mask_flags = MTD_WRITEABLE, /* force read-only */
|
||||
}, {
|
||||
.name = "Linux",
|
||||
.offset = MTDPART_OFS_APPEND,
|
||||
.size = 0, /* filled in later */
|
||||
}, {
|
||||
.name = "RedBoot",
|
||||
.offset = MTDPART_OFS_APPEND,
|
||||
.size = MTDPART_SIZ_FULL,
|
||||
.mask_flags = MTD_WRITEABLE, /* force read-only */
|
||||
},
|
||||
};
|
||||
|
||||
static void ts72xx_nand_set_parts(uint64_t size,
|
||||
struct platform_nand_chip *chip)
|
||||
{
|
||||
/* Factory TS-72xx boards only come with 32MiB or 128MiB NAND options */
|
||||
if (size == SZ_32M || size == SZ_128M) {
|
||||
/* Set the "Linux" partition size */
|
||||
ts72xx_nand_parts[1].size = size - TS72XX_REDBOOT_PART_SIZE;
|
||||
|
||||
chip->partitions = ts72xx_nand_parts;
|
||||
chip->nr_partitions = ARRAY_SIZE(ts72xx_nand_parts);
|
||||
} else {
|
||||
pr_warning("Unknown nand disk size:%lluMiB\n", size >> 20);
|
||||
}
|
||||
}
|
||||
|
||||
static struct platform_nand_data ts72xx_nand_data = {
|
||||
.chip = {
|
||||
.nr_chips = 1,
|
||||
.chip_offset = 0,
|
||||
.chip_delay = 15,
|
||||
.part_probe_types = ts72xx_nand_part_probes,
|
||||
.set_parts = ts72xx_nand_set_parts,
|
||||
},
|
||||
.ctrl = {
|
||||
.cmd_ctrl = ts72xx_nand_hwcontrol,
|
||||
.dev_ready = ts72xx_nand_device_ready,
|
||||
},
|
||||
};
|
||||
|
||||
static struct resource ts72xx_nand_resource[] = {
|
||||
{
|
||||
.start = 0, /* filled in later */
|
||||
.end = 0, /* filled in later */
|
||||
.flags = IORESOURCE_MEM,
|
||||
},
|
||||
};
|
||||
|
||||
static struct platform_device ts72xx_nand_flash = {
|
||||
.name = "gen_nand",
|
||||
.id = -1,
|
||||
.dev.platform_data = &ts72xx_nand_data,
|
||||
.resource = ts72xx_nand_resource,
|
||||
.num_resources = ARRAY_SIZE(ts72xx_nand_resource),
|
||||
};
|
||||
|
||||
|
||||
/*************************************************************************
|
||||
* NOR flash (TS-7200 only)
|
||||
*************************************************************************/
|
||||
static struct physmap_flash_data ts72xx_flash_data = {
|
||||
static struct physmap_flash_data ts72xx_nor_data = {
|
||||
.width = 2,
|
||||
};
|
||||
|
||||
static struct resource ts72xx_flash_resource = {
|
||||
static struct resource ts72xx_nor_resource = {
|
||||
.start = EP93XX_CS6_PHYS_BASE,
|
||||
.end = EP93XX_CS6_PHYS_BASE + SZ_16M - 1,
|
||||
.flags = IORESOURCE_MEM,
|
||||
};
|
||||
|
||||
static struct platform_device ts72xx_flash = {
|
||||
.name = "physmap-flash",
|
||||
.id = 0,
|
||||
.dev = {
|
||||
.platform_data = &ts72xx_flash_data,
|
||||
},
|
||||
.num_resources = 1,
|
||||
.resource = &ts72xx_flash_resource,
|
||||
static struct platform_device ts72xx_nor_flash = {
|
||||
.name = "physmap-flash",
|
||||
.id = 0,
|
||||
.dev.platform_data = &ts72xx_nor_data,
|
||||
.resource = &ts72xx_nor_resource,
|
||||
.num_resources = 1,
|
||||
};
|
||||
|
||||
static void __init ts72xx_register_flash(void)
|
||||
{
|
||||
if (board_is_ts7200())
|
||||
platform_device_register(&ts72xx_flash);
|
||||
if (board_is_ts7200()) {
|
||||
platform_device_register(&ts72xx_nor_flash);
|
||||
} else {
|
||||
resource_size_t start;
|
||||
|
||||
if (is_ts9420_installed())
|
||||
start = EP93XX_CS7_PHYS_BASE;
|
||||
else
|
||||
start = EP93XX_CS6_PHYS_BASE;
|
||||
|
||||
ts72xx_nand_resource[0].start = start;
|
||||
ts72xx_nand_resource[0].end = start + SZ_16M - 1;
|
||||
|
||||
platform_device_register(&ts72xx_nand_flash);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
|
||||
{
|
||||
__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user