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ar71xx: add NAND driver for the RB750

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SVN-Revision: 20054
This commit is contained in:
Gabor Juhos 2010-03-08 12:10:23 +00:00
parent 6c1be20c2a
commit d58a367083
6 changed files with 410 additions and 1 deletions
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1
target/linux/ar71xx/config-2.6.32
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@ -162,6 +162,7 @@ CONFIG_MTD_M25P80=y
CONFIG_MTD_MYLOADER_PARTS=y
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_RB4XX=y
CONFIG_MTD_NAND_RB750=y
CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK=-2
CONFIG_MTD_REDBOOT_PARTS=y
CONFIG_MTD_WRT160NL_PARTS=y

1
target/linux/ar71xx/config-2.6.33
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@ -205,6 +205,7 @@ CONFIG_MTD_M25P80=y
CONFIG_MTD_MYLOADER_PARTS=y
CONFIG_MTD_NAND=y
CONFIG_MTD_NAND_RB4XX=y
CONFIG_MTD_NAND_RB750=y
CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK=-2
CONFIG_MTD_REDBOOT_PARTS=y
CONFIG_MTD_WRT160NL_PARTS=y

7
target/linux/ar71xx/files/arch/mips/ar71xx/mach-rb750.c
View file

@ -50,12 +50,16 @@ static struct rb750_led_platform_data rb750_leds_data = {
static struct platform_device rb750_leds_device = {
.name = "leds-rb750",
.id = -1,
.dev = {
.platform_data = &rb750_leds_data,
}
};
static struct platform_device rb750_nand_device = {
.name = "rb750-nand",
.id = -1,
};
int rb750_latch_change(u32 mask_clr, u32 mask_set)
{
static DEFINE_SPINLOCK(lock);
@ -115,6 +119,7 @@ static void __init rb750_setup(void)
ap91_eth_init(NULL);
platform_device_register(&rb750_leds_device);
platform_device_register(&rb750_nand_device);
}
MIPS_MACHINE(AR71XX_MACH_RB_750, "750i", "MikroTik RouterBOARD 750",

360
target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c Normal file
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@ -0,0 +1,360 @@
/*
* NAND flash driver for the MikroTik RouterBOARD 750
*
* Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <asm/mach-ar71xx/ar71xx.h>
#include <asm/mach-ar71xx/mach-rb750.h>
#define DRV_NAME "rb750-nand"
#define DRV_VERSION "0.1.0"
#define DRV_DESC "NAND flash driver for the RouterBOARD 750"
#define RB750_NAND_IO0 BIT(RB750_GPIO_NAND_IO0)
#define RB750_NAND_ALE BIT(RB750_GPIO_NAND_ALE)
#define RB750_NAND_CLE BIT(RB750_GPIO_NAND_CLE)
#define RB750_NAND_NRE BIT(RB750_GPIO_NAND_NRE)
#define RB750_NAND_NWE BIT(RB750_GPIO_NAND_NWE)
#define RB750_NAND_RDY BIT(RB750_GPIO_NAND_RDY)
#define RB750_NAND_NCE BIT(RB750_GPIO_NAND_NCE)
#define RB750_NAND_DATA_SHIFT 1
#define RB750_NAND_DATA_BITS (0xff << RB750_NAND_DATA_SHIFT)
#define RB750_NAND_INPUT_BITS (RB750_NAND_DATA_BITS | RB750_NAND_RDY)
#define RB750_NAND_OUTPUT_BITS (RB750_NAND_ALE | RB750_NAND_CLE | \
RB750_NAND_NRE | RB750_NAND_NWE | \
RB750_NAND_NCE)
struct rb750_nand_info {
struct nand_chip chip;
struct mtd_info mtd;
};
/*
* We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader
* will not be able to find the kernel that we load.
*/
static struct nand_ecclayout rb750_nand_ecclayout = {
.eccbytes = 6,
.eccpos = { 8, 9, 10, 13, 14, 15 },
.oobavail = 9,
.oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
};
static struct mtd_partition rb750_nand_partitions[] = {
{
.name = "booter",
.offset = 0,
.size = (256 * 1024),
.mask_flags = MTD_WRITEABLE,
}, {
.name = "kernel",
.offset = (256 * 1024),
.size = (4 * 1024 * 1024) - (256 * 1024),
}, {
.name = "rootfs",
.offset = MTDPART_OFS_NXTBLK,
.size = MTDPART_SIZ_FULL,
},
};
static void rb750_nand_write(const u8 *buf, unsigned len)
{
void __iomem *base = ar71xx_gpio_base;
u32 out;
unsigned i;
/* set data lines to output mode */
__raw_writel(__raw_readl(base + GPIO_REG_OE) | RB750_NAND_DATA_BITS,
base + GPIO_REG_OE);
out = __raw_readl(base + GPIO_REG_OUT);
out &= ~(RB750_NAND_DATA_BITS | RB750_NAND_NWE);
for (i = 0; i != len; i++) {
u32 data;
data = buf[i];
data <<= RB750_NAND_DATA_SHIFT;
data |= out;
__raw_writel(data, base + GPIO_REG_OUT);
__raw_writel(data | RB750_NAND_NWE, base + GPIO_REG_OUT);
/* flush write */
__raw_readl(base + GPIO_REG_OUT);
}
/* set data lines to input mode */
__raw_writel(__raw_readl(base + GPIO_REG_OE) & ~RB750_NAND_DATA_BITS,
base + GPIO_REG_OE);
/* flush write */
__raw_readl(base + GPIO_REG_OE);
}
static int rb750_nand_read_verify(u8 *read_buf, unsigned len,
const u8 *verify_buf)
{
void __iomem *base = ar71xx_gpio_base;
unsigned i;
for (i = 0; i < len; i++) {
u8 data;
/* activate RE line */
__raw_writel(RB750_NAND_NRE, base + GPIO_REG_CLEAR);
/* flush write */
__raw_readl(base + GPIO_REG_CLEAR);
/* read input lines */
data = __raw_readl(base + GPIO_REG_IN) >> RB750_NAND_DATA_SHIFT;
/* deactivate RE line */
__raw_writel(RB750_NAND_NRE, base + GPIO_REG_SET);
if (read_buf)
read_buf[i] = data;
else if (verify_buf && verify_buf[i] != data)
return -EFAULT;
}
return 0;
}
static void rb750_nand_select_chip(struct mtd_info *mtd, int chip)
{
void __iomem *base = ar71xx_gpio_base;
u32 func;
func = __raw_readl(base + GPIO_REG_FUNC);
if (chip >= 0) {
/* disable latch */
rb750_latch_change(RB750_LVC573_LE, 0);
/* disable alternate functions */
ar71xx_gpio_function_setup(AR724X_GPIO_FUNC_JTAG_DISABLE,
AR724X_GPIO_FUNC_SPI_EN);
/* set input mode for data lines */
__raw_writel(__raw_readl(base + GPIO_REG_OE) &
~RB750_NAND_INPUT_BITS,
base + GPIO_REG_OE);
/* deactivate RE and WE lines */
__raw_writel(RB750_NAND_NRE | RB750_NAND_NWE,
base + GPIO_REG_SET);
/* flush write */
(void) __raw_readl(base + GPIO_REG_SET);
/* activate CE line */
__raw_writel(RB750_NAND_NCE, base + GPIO_REG_CLEAR);
} else {
/* deactivate CE line */
__raw_writel(RB750_NAND_NCE, base + GPIO_REG_SET);
/* flush write */
(void) __raw_readl(base + GPIO_REG_SET);
__raw_writel(__raw_readl(base + GPIO_REG_OE) |
RB750_NAND_IO0 | RB750_NAND_RDY,
base + GPIO_REG_OE);
/* restore alternate functions */
ar71xx_gpio_function_setup(AR724X_GPIO_FUNC_SPI_EN,
AR724X_GPIO_FUNC_JTAG_DISABLE);
/* enable latch */
rb750_latch_change(0, RB750_LVC573_LE);
}
}
static int rb750_nand_dev_ready(struct mtd_info *mtd)
{
void __iomem *base = ar71xx_gpio_base;
return !!(__raw_readl(base + GPIO_REG_IN) & RB750_NAND_RDY);
}
static void rb750_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
if (ctrl & NAND_CTRL_CHANGE) {
void __iomem *base = ar71xx_gpio_base;
u32 t;
t = __raw_readl(base + GPIO_REG_OUT);
t &= ~(RB750_NAND_CLE | RB750_NAND_ALE);
t |= (ctrl & NAND_CLE) ? RB750_NAND_CLE : 0;
t |= (ctrl & NAND_ALE) ? RB750_NAND_ALE : 0;
__raw_writel(t, base + GPIO_REG_OUT);
/* flush write */
__raw_readl(base + GPIO_REG_OUT);
}
if (cmd != NAND_CMD_NONE) {
u8 t = cmd;
rb750_nand_write(&t, 1);
}
}
static u8 rb750_nand_read_byte(struct mtd_info *mtd)
{
u8 data = 0;
rb750_nand_read_verify(&data, 1, NULL);
return data;
}
static void rb750_nand_read_buf(struct mtd_info *mtd, u8 *buf, int len)
{
rb750_nand_read_verify(buf, len, NULL);
}
static void rb750_nand_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
{
rb750_nand_write(buf, len);
}
static int rb750_nand_verify_buf(struct mtd_info *mtd, const u8 *buf, int len)
{
return rb750_nand_read_verify(NULL, len, buf);
}
static void __init rb750_nand_gpio_init(void)
{
void __iomem *base = ar71xx_gpio_base;
u32 out;
out = __raw_readl(base + GPIO_REG_OUT);
/* setup output levels */
__raw_writel(RB750_NAND_NCE | RB750_NAND_NRE | RB750_NAND_NWE,
base + GPIO_REG_SET);
__raw_writel(RB750_NAND_ALE | RB750_NAND_CLE,
base + GPIO_REG_CLEAR);
/* setup input lines */
__raw_writel(__raw_readl(base + GPIO_REG_OE) & ~(RB750_NAND_INPUT_BITS),
base + GPIO_REG_OE);
/* setup output lines */
__raw_writel(__raw_readl(base + GPIO_REG_OE) | RB750_NAND_OUTPUT_BITS,
base + GPIO_REG_OE);
rb750_latch_change(~out & RB750_NAND_IO0, out & RB750_NAND_IO0);
}
static int __init rb750_nand_probe(struct platform_device *pdev)
{
struct rb750_nand_info *info;
int ret;
printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
rb750_nand_gpio_init();
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->chip.priv = &info;
info->mtd.priv = &info->chip;
info->mtd.owner = THIS_MODULE;
info->chip.select_chip = rb750_nand_select_chip;
info->chip.cmd_ctrl = rb750_nand_cmd_ctrl;
info->chip.dev_ready = rb750_nand_dev_ready;
info->chip.read_byte = rb750_nand_read_byte;
info->chip.write_buf = rb750_nand_write_buf;
info->chip.read_buf = rb750_nand_read_buf;
info->chip.verify_buf = rb750_nand_verify_buf;
info->chip.chip_delay = 25;
info->chip.ecc.mode = NAND_ECC_SOFT;
info->chip.options |= NAND_NO_AUTOINCR;
platform_set_drvdata(pdev, info);
ret = nand_scan_ident(&info->mtd, 1);
if (ret) {
ret = -ENXIO;
goto err_free_info;
}
if (info->mtd.writesize == 512)
info->chip.ecc.layout = &rb750_nand_ecclayout;
ret = nand_scan_tail(&info->mtd);
if (ret) {
return -ENXIO;
goto err_set_drvdata;
}
#ifdef CONFIG_MTD_PARTITIONS
ret = add_mtd_partitions(&info->mtd, rb750_nand_partitions,
ARRAY_SIZE(rb750_nand_partitions));
#else
ret = add_mtd_device(&info->mtd);
#endif
if (ret)
goto err_release_nand;
return 0;
err_release_nand:
nand_release(&info->mtd);
err_set_drvdata:
platform_set_drvdata(pdev, NULL);
err_free_info:
kfree(info);
return ret;
}
static int __devexit rb750_nand_remove(struct platform_device *pdev)
{
struct rb750_nand_info *info = platform_get_drvdata(pdev);
nand_release(&info->mtd);
platform_set_drvdata(pdev, NULL);
kfree(info);
return 0;
}
static struct platform_driver rb750_nand_driver = {
.probe = rb750_nand_probe,
.remove = __devexit_p(rb750_nand_remove),
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
},
};
static int __init rb750_nand_init(void)
{
return platform_driver_register(&rb750_nand_driver);
}
static void __exit rb750_nand_exit(void)
{
platform_driver_unregister(&rb750_nand_driver);
}
module_init(rb750_nand_init);
module_exit(rb750_nand_exit);
MODULE_DESCRIPTION(DRV_DESC);
MODULE_VERSION(DRV_VERSION);
MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
MODULE_LICENSE("GPL v2");

21
target/linux/ar71xx/patches-2.6.32/208-rb750-nand-driver.patch Normal file
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@ -0,0 +1,21 @@
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -486,4 +486,8 @@ config MTD_NAND_RB4XX
tristate "NAND flash driver for RouterBoard 4xx series"
depends on MTD_NAND && AR71XX_MACH_RB4XX
+config MTD_NAND_RB750
+ tristate "NAND flash driver for the RouterBoard 750"
+ depends on MTD_NAND && AR71XX_MACH_RB750
+
endif # MTD_NAND
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_MTD_NAND_PXA3xx) += pxa3xx
obj-$(CONFIG_MTD_NAND_TMIO) += tmio_nand.o
obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o
obj-$(CONFIG_MTD_NAND_RB4XX) += rb4xx_nand.o
+obj-$(CONFIG_MTD_NAND_RB750) += rb750_nand.o
obj-$(CONFIG_MTD_ALAUDA) += alauda.o
obj-$(CONFIG_MTD_NAND_PASEMI) += pasemi_nand.o
obj-$(CONFIG_MTD_NAND_ORION) += orion_nand.o

21
target/linux/ar71xx/patches-2.6.33/208-rb750-nand-driver.patch Normal file
View file

@ -0,0 +1,21 @@
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -486,4 +486,8 @@ config MTD_NAND_RB4XX
tristate "NAND flash driver for RouterBoard 4xx series"
depends on MTD_NAND && AR71XX_MACH_RB4XX
+config MTD_NAND_RB750
+ tristate "NAND flash driver for the RouterBoard 750"
+ depends on MTD_NAND && AR71XX_MACH_RB750
+
endif # MTD_NAND
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_MTD_NAND_PXA3xx) += pxa3xx
obj-$(CONFIG_MTD_NAND_TMIO) += tmio_nand.o
obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o
obj-$(CONFIG_MTD_NAND_RB4XX) += rb4xx_nand.o
+obj-$(CONFIG_MTD_NAND_RB750) += rb750_nand.o
obj-$(CONFIG_MTD_ALAUDA) += alauda.o
obj-$(CONFIG_MTD_NAND_PASEMI) += pasemi_nand.o
obj-$(CONFIG_MTD_NAND_ORION) += orion_nand.o