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authorjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-03-19 15:56:59 +0000
committerjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-03-19 15:56:59 +0000
commite929396e1934302d402a5608fecb9554e95d6673 (patch)
tree73e73c314d68ff0e92bcc9e9db9b54f9ed4d0166 /target/linux/ar71xx/files/drivers/mtd
parent580a413385ed8640fb90d5b7dcdf6443df2502da (diff)
ar71xx: add platform data for the RB750 NAND driver
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31022 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar71xx/files/drivers/mtd')
-rw-r--r--target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c46
1 files changed, 27 insertions, 19 deletions
diff --git a/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c b/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c
index f97e6e6c6..251e18220 100644
--- a/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c
+++ b/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c
@@ -31,20 +31,24 @@
#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)
+ RB750_NAND_NRE | RB750_NAND_NWE)
struct rb750_nand_info {
struct nand_chip chip;
struct mtd_info mtd;
+ struct rb7xx_nand_platform_data *pdata;
};
+static inline struct rb750_nand_info *mtd_to_rbinfo(struct mtd_info *mtd)
+{
+ return container_of(mtd, struct rb750_nand_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.
@@ -138,16 +142,12 @@ static int rb750_nand_read_verify(u8 *read_buf, unsigned len,
static void rb750_nand_select_chip(struct mtd_info *mtd, int chip)
{
+ struct rb750_nand_info *rbinfo = mtd_to_rbinfo(mtd);
void __iomem *base = ath79_gpio_base;
- u32 func;
u32 t;
- func = __raw_readl(base + AR71XX_GPIO_REG_FUNC);
if (chip >= 0) {
- /* disable latch */
- rb750_latch_change(RB750_LVC573_LE, 0);
-
- rb750_nand_pins_enable();
+ rbinfo->pdata->enable_pins();
/* set input mode for data lines */
t = __raw_readl(base + AR71XX_GPIO_REG_OE);
@@ -161,10 +161,12 @@ static void rb750_nand_select_chip(struct mtd_info *mtd, int chip)
(void) __raw_readl(base + AR71XX_GPIO_REG_SET);
/* activate CE line */
- __raw_writel(RB750_NAND_NCE, base + AR71XX_GPIO_REG_CLEAR);
+ __raw_writel(rbinfo->pdata->nce_line,
+ base + AR71XX_GPIO_REG_CLEAR);
} else {
/* deactivate CE line */
- __raw_writel(RB750_NAND_NCE, base + AR71XX_GPIO_REG_SET);
+ __raw_writel(rbinfo->pdata->nce_line,
+ base + AR71XX_GPIO_REG_SET);
/* flush write */
(void) __raw_readl(base + AR71XX_GPIO_REG_SET);
@@ -172,10 +174,7 @@ static void rb750_nand_select_chip(struct mtd_info *mtd, int chip)
__raw_writel(t | RB750_NAND_IO0 | RB750_NAND_RDY,
base + AR71XX_GPIO_REG_OE);
- rb750_nand_pins_disable();
-
- /* enable latch */
- rb750_latch_change(0, RB750_LVC573_LE);
+ rbinfo->pdata->disable_pins();
}
}
@@ -232,7 +231,7 @@ 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)
+static void __init rb750_nand_gpio_init(struct rb750_nand_info *info)
{
void __iomem *base = ath79_gpio_base;
u32 out;
@@ -253,19 +252,24 @@ static void __init rb750_nand_gpio_init(void)
/* setup output lines */
t = __raw_readl(base + AR71XX_GPIO_REG_OE);
- __raw_writel(t | RB750_NAND_OUTPUT_BITS, base + AR71XX_GPIO_REG_OE);
+ t |= RB750_NAND_OUTPUT_BITS;
+ t |= info->pdata->nce_line;
+ __raw_writel(t, base + AR71XX_GPIO_REG_OE);
- rb750_latch_change(~out & RB750_NAND_IO0, out & RB750_NAND_IO0);
+ info->pdata->latch_change(~out & RB750_NAND_IO0, out & RB750_NAND_IO0);
}
static int __devinit rb750_nand_probe(struct platform_device *pdev)
{
struct rb750_nand_info *info;
+ struct rb7xx_nand_platform_data *pdata;
int ret;
printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n");
- rb750_nand_gpio_init();
+ pdata = pdev->dev.platform_data;
+ if (!pdata)
+ return -EINVAL;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
@@ -287,8 +291,12 @@ static int __devinit rb750_nand_probe(struct platform_device *pdev)
info->chip.ecc.mode = NAND_ECC_SOFT;
info->chip.options |= NAND_NO_AUTOINCR;
+ info->pdata = pdata;
+
platform_set_drvdata(pdev, info);
+ rb750_nand_gpio_init(info);
+
ret = nand_scan_ident(&info->mtd, 1, NULL);
if (ret) {
ret = -ENXIO;