ar71xx: Add kernel 4.9 support

[openwrt/staging/mkresin.git] / target / linux / ar71xx / files / drivers / mtd / nand / rb750_nand.c

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 9a0eadb93d291e5ae33b5061c47dcbfba236a854..f8a6722cba3f095924ea0e06d6953002cef78285 100644 (file)
--- a/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c
+++ b/target/linux/ar71xx/files/drivers/mtd/nand/rb750_nand.c
@@ -16,6 +16,7 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/slab.h>
+#include <linux/version.h>
 
 #include <asm/mach-ath79/ar71xx_regs.h>
 #include <asm/mach-ath79/ath79.h>
@@ -49,6 +50,7 @@ static inline struct rb750_nand_info *mtd_to_rbinfo(struct mtd_info *mtd)
        return container_of(mtd, struct rb750_nand_info, mtd);
 }
 
+#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.
@@ -60,6 +62,56 @@ static struct nand_ecclayout rb750_nand_ecclayout = {
        .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",
@@ -71,7 +123,7 @@ static struct mtd_partition rb750_nand_partitions[] = {
                .offset = (256 * 1024),
                .size   = (4 * 1024 * 1024) - (256 * 1024),
        }, {
-               .name   = "rootfs",
+               .name   = "ubi",
                .offset = MTDPART_OFS_NXTBLK,
                .size   = MTDPART_SIZ_FULL,
        },
@@ -110,8 +162,7 @@ static void rb750_nand_write(const u8 *buf, unsigned len)
        __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 = ath79_gpio_base;
        unsigned i;
@@ -131,13 +182,8 @@ static int rb750_nand_read_verify(u8 *read_buf, unsigned len,
                /* deactivate RE line */
                __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)
@@ -212,13 +258,13 @@ static void rb750_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
 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)
@@ -226,11 +272,6 @@ 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(struct rb750_nand_info *info)
 {
        void __iomem *base = ath79_gpio_base;
@@ -259,7 +300,7 @@ static void __init rb750_nand_gpio_init(struct rb750_nand_info *info)
        info->pdata->latch_change(~out & RB750_NAND_IO0, out & RB750_NAND_IO0);
 }
 
-static int __devinit 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;
@@ -285,10 +326,10 @@ static int __devinit rb750_nand_probe(struct platform_device *pdev)
        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_SUBPAGE_WRITE;
 
        info->pdata = pdata;
 
@@ -303,7 +344,11 @@ static int __devinit rb750_nand_probe(struct platform_device *pdev)
        }
 
        if (info->mtd.writesize == 512)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0)
                info->chip.ecc.layout = &rb750_nand_ecclayout;
+#else
+               mtd_set_ooblayout(&info->mtd, &rb750_nand_ecclayout_ops);
+#endif
 
        ret = nand_scan_tail(&info->mtd);
        if (ret) {
@@ -327,7 +372,7 @@ err_free_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);
 
@@ -340,7 +385,7 @@ static int __devexit rb750_nand_remove(struct platform_device *pdev)
 
 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,