/*
* NAND flash driver for the MikroTik RouterBOARD 750
*
- * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2010-2012 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/kernel.h>
+#include <linux/module.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 <linux/slab.h>
+#include <linux/version.h>
-#include <asm/mach-ar71xx/ar71xx.h>
-#include <asm/mach-ar71xx/mach-rb750.h>
+#include <asm/mach-ath79/ar71xx_regs.h>
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/mach-rb750.h>
#define DRV_NAME "rb750-nand"
#define DRV_VERSION "0.1.0"
#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;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
struct mtd_info mtd;
+#endif
+ struct rb7xx_nand_platform_data *pdata;
};
+static inline struct rb750_nand_info *mtd_to_rbinfo(struct mtd_info *mtd)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+ return container_of(mtd, struct rb750_nand_info, mtd);
+#else
+ struct nand_chip *chip = mtd_to_nand(mtd);
+
+ return container_of(chip, struct rb750_nand_info, chip);
+#endif
+}
+
+static struct mtd_info *rbinfo_to_mtd(struct rb750_nand_info *nfc)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+ return &nfc->mtd;
+#else
+ return nand_to_mtd(&nfc->chip);
+#endif
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
/*
* 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.
.oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } }
};
+#else
+
+static int rb750_ooblayout_ecc(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ switch (section) {
+ case 0:
+ oobregion->offset = 8;
+ oobregion->length = 3;
+ return 0;
+ case 1:
+ oobregion->offset = 13;
+ oobregion->length = 3;
+ return 0;
+ default:
+ return -ERANGE;
+ }
+}
+
+static int rb750_ooblayout_free(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ switch (section) {
+ case 0:
+ oobregion->offset = 0;
+ oobregion->length = 4;
+ return 0;
+ case 1:
+ oobregion->offset = 4;
+ oobregion->length = 1;
+ return 0;
+ case 2:
+ oobregion->offset = 6;
+ oobregion->length = 2;
+ return 0;
+ case 3:
+ oobregion->offset = 11;
+ oobregion->length = 2;
+ return 0;
+ default:
+ return -ERANGE;
+ }
+}
+
+static const struct mtd_ooblayout_ops rb750_nand_ecclayout_ops = {
+ .ecc = rb750_ooblayout_ecc,
+ .free = rb750_ooblayout_free,
+};
+#endif /* < 4.6 */
+
static struct mtd_partition rb750_nand_partitions[] = {
{
.name = "booter",
.offset = (256 * 1024),
.size = (4 * 1024 * 1024) - (256 * 1024),
}, {
- .name = "rootfs",
+ .name = "ubi",
.offset = MTDPART_OFS_NXTBLK,
.size = MTDPART_SIZ_FULL,
},
static void rb750_nand_write(const u8 *buf, unsigned len)
{
- void __iomem *base = ar71xx_gpio_base;
+ void __iomem *base = ath79_gpio_base;
u32 out;
+ u32 t;
unsigned i;
/* set data lines to output mode */
- __raw_writel(__raw_readl(base + GPIO_REG_OE) | RB750_NAND_DATA_BITS,
- base + GPIO_REG_OE);
+ t = __raw_readl(base + AR71XX_GPIO_REG_OE);
+ __raw_writel(t | RB750_NAND_DATA_BITS, base + AR71XX_GPIO_REG_OE);
- out = __raw_readl(base + GPIO_REG_OUT);
+ out = __raw_readl(base + AR71XX_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, base + AR71XX_GPIO_REG_OUT);
- __raw_writel(data | RB750_NAND_NWE, base + GPIO_REG_OUT);
+ __raw_writel(data | RB750_NAND_NWE, base + AR71XX_GPIO_REG_OUT);
/* flush write */
- __raw_readl(base + GPIO_REG_OUT);
+ __raw_readl(base + AR71XX_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);
+ t = __raw_readl(base + AR71XX_GPIO_REG_OE);
+ __raw_writel(t & ~RB750_NAND_DATA_BITS, base + AR71XX_GPIO_REG_OE);
/* flush write */
- __raw_readl(base + GPIO_REG_OE);
+ __raw_readl(base + AR71XX_GPIO_REG_OE);
}
-static int rb750_nand_read_verify(u8 *read_buf, unsigned len,
- const u8 *verify_buf)
+static void rb750_nand_read(u8 *read_buf, unsigned len)
{
- void __iomem *base = ar71xx_gpio_base;
+ void __iomem *base = ath79_gpio_base;
unsigned i;
for (i = 0; i < len; i++) {
u8 data;
/* activate RE line */
- __raw_writel(RB750_NAND_NRE, base + GPIO_REG_CLEAR);
+ __raw_writel(RB750_NAND_NRE, base + AR71XX_GPIO_REG_CLEAR);
/* flush write */
- __raw_readl(base + GPIO_REG_CLEAR);
+ __raw_readl(base + AR71XX_GPIO_REG_CLEAR);
/* read input lines */
- data = __raw_readl(base + GPIO_REG_IN) >> RB750_NAND_DATA_SHIFT;
+ data = __raw_readl(base + AR71XX_GPIO_REG_IN) >>
+ RB750_NAND_DATA_SHIFT;
/* deactivate RE line */
- __raw_writel(RB750_NAND_NRE, base + GPIO_REG_SET);
+ __raw_writel(RB750_NAND_NRE, base + AR71XX_GPIO_REG_SET);
- if (read_buf)
- read_buf[i] = data;
- else if (verify_buf && verify_buf[i] != data)
- return -EFAULT;
+ read_buf[i] = data;
}
-
- return 0;
}
static void rb750_nand_select_chip(struct mtd_info *mtd, int chip)
{
- void __iomem *base = ar71xx_gpio_base;
- u32 func;
+ struct rb750_nand_info *rbinfo = mtd_to_rbinfo(mtd);
+ void __iomem *base = ath79_gpio_base;
+ u32 t;
- 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);
+ rbinfo->pdata->enable_pins();
/* set input mode for data lines */
- __raw_writel(__raw_readl(base + GPIO_REG_OE) &
- ~RB750_NAND_INPUT_BITS,
- base + GPIO_REG_OE);
+ t = __raw_readl(base + AR71XX_GPIO_REG_OE);
+ __raw_writel(t & ~RB750_NAND_INPUT_BITS,
+ base + AR71XX_GPIO_REG_OE);
/* deactivate RE and WE lines */
__raw_writel(RB750_NAND_NRE | RB750_NAND_NWE,
- base + GPIO_REG_SET);
+ base + AR71XX_GPIO_REG_SET);
/* flush write */
- (void) __raw_readl(base + GPIO_REG_SET);
+ (void) __raw_readl(base + AR71XX_GPIO_REG_SET);
/* activate CE line */
- __raw_writel(RB750_NAND_NCE, base + GPIO_REG_CLEAR);
+ __raw_writel(rbinfo->pdata->nce_line,
+ base + AR71XX_GPIO_REG_CLEAR);
} else {
/* deactivate CE line */
- __raw_writel(RB750_NAND_NCE, base + GPIO_REG_SET);
+ __raw_writel(rbinfo->pdata->nce_line,
+ base + AR71XX_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);
+ (void) __raw_readl(base + AR71XX_GPIO_REG_SET);
- /* restore alternate functions */
- ar71xx_gpio_function_setup(AR724X_GPIO_FUNC_SPI_EN,
- AR724X_GPIO_FUNC_JTAG_DISABLE);
+ t = __raw_readl(base + AR71XX_GPIO_REG_OE);
+ __raw_writel(t | RB750_NAND_IO0 | RB750_NAND_RDY,
+ base + AR71XX_GPIO_REG_OE);
- /* enable latch */
- rb750_latch_change(0, RB750_LVC573_LE);
+ rbinfo->pdata->disable_pins();
}
}
static int rb750_nand_dev_ready(struct mtd_info *mtd)
{
- void __iomem *base = ar71xx_gpio_base;
+ void __iomem *base = ath79_gpio_base;
- return !!(__raw_readl(base + GPIO_REG_IN) & RB750_NAND_RDY);
+ return !!(__raw_readl(base + AR71XX_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;
+ void __iomem *base = ath79_gpio_base;
u32 t;
- t = __raw_readl(base + GPIO_REG_OUT);
+ t = __raw_readl(base + AR71XX_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);
+ __raw_writel(t, base + AR71XX_GPIO_REG_OUT);
/* flush write */
- __raw_readl(base + GPIO_REG_OUT);
+ __raw_readl(base + AR71XX_GPIO_REG_OUT);
}
if (cmd != NAND_CMD_NONE) {
static u8 rb750_nand_read_byte(struct mtd_info *mtd)
{
u8 data = 0;
- rb750_nand_read_verify(&data, 1, NULL);
+ rb750_nand_read(&data, 1);
return data;
}
static void rb750_nand_read_buf(struct mtd_info *mtd, u8 *buf, int len)
{
- rb750_nand_read_verify(buf, len, NULL);
+ rb750_nand_read(buf, len);
}
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)
+static void __init rb750_nand_gpio_init(struct rb750_nand_info *info)
{
- void __iomem *base = ar71xx_gpio_base;
+ void __iomem *base = ath79_gpio_base;
u32 out;
+ u32 t;
- out = __raw_readl(base + GPIO_REG_OUT);
+ out = __raw_readl(base + AR71XX_GPIO_REG_OUT);
/* setup output levels */
__raw_writel(RB750_NAND_NCE | RB750_NAND_NRE | RB750_NAND_NWE,
- base + GPIO_REG_SET);
+ base + AR71XX_GPIO_REG_SET);
__raw_writel(RB750_NAND_ALE | RB750_NAND_CLE,
- base + GPIO_REG_CLEAR);
+ base + AR71XX_GPIO_REG_CLEAR);
/* setup input lines */
- __raw_writel(__raw_readl(base + GPIO_REG_OE) & ~(RB750_NAND_INPUT_BITS),
- base + GPIO_REG_OE);
+ t = __raw_readl(base + AR71XX_GPIO_REG_OE);
+ __raw_writel(t & ~(RB750_NAND_INPUT_BITS), base + AR71XX_GPIO_REG_OE);
/* setup output lines */
- __raw_writel(__raw_readl(base + GPIO_REG_OE) | RB750_NAND_OUTPUT_BITS,
- base + GPIO_REG_OE);
+ t = __raw_readl(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 __init rb750_nand_probe(struct platform_device *pdev)
+static int rb750_nand_probe(struct platform_device *pdev)
{
struct rb750_nand_info *info;
+ struct rb7xx_nand_platform_data *pdata;
+ struct mtd_info *mtd;
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)
return -ENOMEM;
info->chip.priv = &info;
- info->mtd.priv = &info->chip;
- info->mtd.owner = THIS_MODULE;
+
+ mtd = rbinfo_to_mtd(info);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
+ mtd->priv = &info->chip;
+#endif
+ mtd->owner = THIS_MODULE;
info->chip.select_chip = rb750_nand_select_chip;
info->chip.cmd_ctrl = rb750_nand_cmd_ctrl;
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;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)
+ info->chip.ecc.algo = NAND_ECC_HAMMING;
+#endif
+ info->chip.options = NAND_NO_SUBPAGE_WRITE;
+
+ info->pdata = pdata;
platform_set_drvdata(pdev, info);
- ret = nand_scan_ident(&info->mtd, 1);
+ rb750_nand_gpio_init(info);
+
+ ret = nand_scan_ident(mtd, 1, NULL);
if (ret) {
ret = -ENXIO;
goto err_free_info;
}
- if (info->mtd.writesize == 512)
+ if (mtd->writesize == 512)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
info->chip.ecc.layout = &rb750_nand_ecclayout;
+#else
+ mtd_set_ooblayout(mtd, &rb750_nand_ecclayout_ops);
+#endif
- ret = nand_scan_tail(&info->mtd);
+ ret = nand_scan_tail(mtd);
if (ret) {
return -ENXIO;
goto err_set_drvdata;
}
-#ifdef CONFIG_MTD_PARTITIONS
- ret = add_mtd_partitions(&info->mtd, rb750_nand_partitions,
+ ret = mtd_device_register(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:
+err_release_nand:
+ nand_release(mtd);
+err_set_drvdata:
platform_set_drvdata(pdev, NULL);
- err_free_info:
+err_free_info:
kfree(info);
return ret;
}
-static int __devexit rb750_nand_remove(struct platform_device *pdev)
+static int rb750_nand_remove(struct platform_device *pdev)
{
struct rb750_nand_info *info = platform_get_drvdata(pdev);
- nand_release(&info->mtd);
+ nand_release(rbinfo_to_mtd(info));
platform_set_drvdata(pdev, NULL);
kfree(info);
static struct platform_driver rb750_nand_driver = {
.probe = rb750_nand_probe,
- .remove = __devexit_p(rb750_nand_remove),
+ .remove = rb750_nand_remove,
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
projects / openwrt / openwrt.git / blobdiff