ar71xx: add platform data for the RB750 NAND driver
authorGabor Juhos <juhosg@openwrt.org>
Mon, 19 Mar 2012 15:56:59 +0000 (15:56 +0000)
committerGabor Juhos <juhosg@openwrt.org>
Mon, 19 Mar 2012 15:56:59 +0000 (15:56 +0000)
SVN-Revision: 31022

target/linux/ar71xx/files/arch/mips/ath79/mach-rb750.c
target/linux/ar71xx/files/arch/mips/include/asm/mach-ath79/mach-rb750.h
target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c

index 976617b..bcd961e 100644 (file)
@@ -1,5 +1,5 @@
 /*
- *  MikroTik RouterBOARD 750 support
+ *  MikroTik RouterBOARD 750/750GL support
  *
  *  Copyright (C) 2010-2012 Gabor Juhos <juhosg@openwrt.org>
  *
@@ -59,9 +59,13 @@ static struct platform_device rb750_leds_device = {
        }
 };
 
+static struct rb7xx_nand_platform_data rb750_nand_data;
 static struct platform_device rb750_nand_device = {
        .name   = "rb750-nand",
        .id     = -1,
+       .dev    = {
+               .platform_data = &rb750_nand_data,
+       }
 };
 
 int rb750_latch_change(u32 mask_clr, u32 mask_set)
@@ -113,19 +117,24 @@ unlock:
 }
 EXPORT_SYMBOL_GPL(rb750_latch_change);
 
-void rb750_nand_pins_enable(void)
+static void rb750_nand_enable_pins(void)
 {
+       rb750_latch_change(RB750_LVC573_LE, 0);
        ath79_gpio_function_setup(AR724X_GPIO_FUNC_JTAG_DISABLE,
                                  AR724X_GPIO_FUNC_SPI_EN);
 }
-EXPORT_SYMBOL_GPL(rb750_nand_pins_enable);
 
-void rb750_nand_pins_disable(void)
+static void rb750_nand_disable_pins(void)
 {
        ath79_gpio_function_setup(AR724X_GPIO_FUNC_SPI_EN,
                                  AR724X_GPIO_FUNC_JTAG_DISABLE);
+       rb750_latch_change(0, RB750_LVC573_LE);
+}
+
+static void rb750_nand_latch_change(u32 clear, u32 set)
+{
+       rb750_latch_change(clear, set);
 }
-EXPORT_SYMBOL_GPL(rb750_nand_pins_disable);
 
 static void __init rb750_setup(void)
 {
@@ -147,6 +156,11 @@ static void __init rb750_setup(void)
        ath79_register_eth(0);
 
        platform_device_register(&rb750_leds_device);
+
+       rb750_nand_data.nce_line = RB750_NAND_NCE;
+       rb750_nand_data.enable_pins = rb750_nand_enable_pins;
+       rb750_nand_data.disable_pins = rb750_nand_disable_pins;
+       rb750_nand_data.latch_change = rb750_nand_latch_change;
        platform_device_register(&rb750_nand_device);
 }
 
index 3e6fc50..9509fca 100644 (file)
@@ -43,6 +43,7 @@
 #define RB750_LED_PORT3                BIT(RB750_GPIO_LED_PORT3)
 #define RB750_LED_PORT4                BIT(RB750_GPIO_LED_PORT4)
 #define RB750_LED_PORT5                BIT(RB750_GPIO_LED_PORT5)
+#define RB750_NAND_NCE         BIT(RB750_GPIO_NAND_NCE)
 
 #define RB750_LVC573_LE                BIT(RB750_GPIO_LVC573_LE)
 
@@ -61,8 +62,14 @@ struct rb750_led_platform_data {
        struct rb750_led_data   *leds;
 };
 
+struct rb7xx_nand_platform_data {
+       u32 nce_line;
+
+       void (*enable_pins)(void);
+       void (*disable_pins)(void);
+       void (*latch_change)(u32, u32);
+};
+
 int rb750_latch_change(u32 mask_clr, u32 mask_set);
-void rb750_nand_pins_enable(void);
-void rb750_nand_pins_disable(void);
 
 #endif /* _MACH_RB750_H */
\ No newline at end of file
index f97e6e6..251e182 100644 (file)
 #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;