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From 45a115b858cf82a35e51a7541a3f83c4dd4e08ea Mon Sep 17 00:00:00 2001
From: Matthieu Crapet <mcrapet@gmail.com>
Date: Sun, 20 Jun 2010 11:31:22 +0200
Subject: [PATCH 16/18] ts72xx_nand_flash
This is Hartley Sweeten's patch:
Update the ts72xx platform's nand driver support.
It's available since 2.6.35-rc1
Only one concern here, it's the size of TS72XX_BOOTROM_PART_SIZE,
defined here to SZ_16K but can be SZ_128K for boards with 128mb flash.
---
arch/arm/mach-ep93xx/ts72xx.c | 186 ++++++++++++++++++++++++++++-------------
drivers/mtd/nand/Kconfig | 2 +-
2 files changed, 129 insertions(+), 59 deletions(-)
diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c
index 7fd8f80..475559e 100644
--- a/arch/arm/mach-ep93xx/ts72xx.c
+++ b/arch/arm/mach-ep93xx/ts72xx.c
@@ -10,6 +10,8 @@
* 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>
@@ -19,6 +21,8 @@
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/i2c-gpio.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
#include <mach/hardware.h>
#include <mach/ts72xx.h>
@@ -91,90 +95,156 @@ 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 void __init ts72xx_map_io(void)
+{
+ ep93xx_map_io();
+ iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_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 struct map_desc ts72xx_alternate_nand_io_desc[] __initdata = {
+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[] = {
{
- .virtual = TS72XX_NAND_DATA_VIRT_BASE,
- .pfn = __phys_to_pfn(TS72XX_NAND2_DATA_PHYS_BASE),
- .length = TS72XX_NAND_DATA_SIZE,
- .type = MT_DEVICE,
+ .name = "TS-BOOTROM",
+ .offset = 0,
+ .size = TS72XX_BOOTROM_PART_SIZE,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
}, {
- .virtual = TS72XX_NAND_CONTROL_VIRT_BASE,
- .pfn = __phys_to_pfn(TS72XX_NAND2_CONTROL_PHYS_BASE),
- .length = TS72XX_NAND_CONTROL_SIZE,
- .type = MT_DEVICE,
+ .name = "Linux",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 0, /* filled in later */
}, {
- .virtual = TS72XX_NAND_BUSY_VIRT_BASE,
- .pfn = __phys_to_pfn(TS72XX_NAND2_BUSY_PHYS_BASE),
- .length = TS72XX_NAND_BUSY_SIZE,
- .type = MT_DEVICE,
- }
+ .name = "RedBoot",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ },
};
-static void __init ts72xx_map_io(void)
+static void ts72xx_nand_set_parts(uint64_t size,
+ struct platform_nand_chip *chip)
{
- 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));
- }
+ /* 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);
+ }
}
/*************************************************************************
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 42e5ea4..952ae85 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -96,7 +96,7 @@ config MTD_NAND_OMAP_PREFETCH_DMA
Say y for DMA mode or MPU mode will be used
config MTD_NAND_TS7250
- tristate "NAND Flash device on TS-7250 board"
+ tristate "NAND Flash device on TS-7250 board (DEPRECATED)"
depends on MACH_TS72XX
help
Support for NAND flash on Technologic Systems TS-7250 platform.
--
1.7.1
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