diff options
Diffstat (limited to 'target/linux/lantiq/patches-3.8/0033-MTD-lantiq-xway-make-nand-actually-work.patch')
| -rw-r--r-- | target/linux/lantiq/patches-3.8/0033-MTD-lantiq-xway-make-nand-actually-work.patch | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.8/0033-MTD-lantiq-xway-make-nand-actually-work.patch b/target/linux/lantiq/patches-3.8/0033-MTD-lantiq-xway-make-nand-actually-work.patch new file mode 100644 index 0000000000..89044d5770 --- /dev/null +++ b/target/linux/lantiq/patches-3.8/0033-MTD-lantiq-xway-make-nand-actually-work.patch @@ -0,0 +1,122 @@ +From cc77f36d2ea812027dc2a8a94c788c4c145f82dc Mon Sep 17 00:00:00 2001 +From: John Crispin <blogic@openwrt.org> +Date: Mon, 22 Oct 2012 10:25:39 +0200 +Subject: [PATCH 33/40] MTD: lantiq: xway: make nand actually work + +http://lists.infradead.org/pipermail/linux-mtd/2012-September/044240.html + +Signed-off-by: John Crispin <blogic@openwrt.org> +--- + drivers/mtd/nand/xway_nand.c | 54 +++++++++++++++++++++++++++++++++++------- + 1 file changed, 45 insertions(+), 9 deletions(-) + +diff --git a/drivers/mtd/nand/xway_nand.c b/drivers/mtd/nand/xway_nand.c +index 3f81dc8..49b2e47 100644 +--- a/drivers/mtd/nand/xway_nand.c ++++ b/drivers/mtd/nand/xway_nand.c +@@ -54,19 +54,29 @@ + #define NAND_CON_CSMUX (1 << 1) + #define NAND_CON_NANDM 1 + ++static u32 xway_latchcmd; ++ + static void xway_reset_chip(struct nand_chip *chip) + { + unsigned long nandaddr = (unsigned long) chip->IO_ADDR_W; + unsigned long flags; ++ unsigned long timeout; + + nandaddr &= ~NAND_WRITE_ADDR; + nandaddr |= NAND_WRITE_CMD; + + /* finish with a reset */ ++ timeout = jiffies + msecs_to_jiffies(200); ++ + spin_lock_irqsave(&ebu_lock, flags); ++ + writeb(NAND_WRITE_CMD_RESET, (void __iomem *) nandaddr); +- while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0) +- ; ++ do { ++ if ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0) ++ break; ++ cond_resched(); ++ } while (!time_after_eq(jiffies, timeout)); ++ + spin_unlock_irqrestore(&ebu_lock, flags); + } + +@@ -94,17 +104,15 @@ static void xway_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) + unsigned long flags; + + if (ctrl & NAND_CTRL_CHANGE) { +- nandaddr &= ~(NAND_WRITE_CMD | NAND_WRITE_ADDR); + if (ctrl & NAND_CLE) +- nandaddr |= NAND_WRITE_CMD; +- else +- nandaddr |= NAND_WRITE_ADDR; +- this->IO_ADDR_W = (void __iomem *) nandaddr; ++ xway_latchcmd = NAND_WRITE_CMD; ++ else if (ctrl & NAND_ALE) ++ xway_latchcmd = NAND_WRITE_ADDR; + } + + if (cmd != NAND_CMD_NONE) { + spin_lock_irqsave(&ebu_lock, flags); +- writeb(cmd, this->IO_ADDR_W); ++ writeb(cmd, (void __iomem *) (nandaddr | xway_latchcmd)); + while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0) + ; + spin_unlock_irqrestore(&ebu_lock, flags); +@@ -124,12 +132,38 @@ static unsigned char xway_read_byte(struct mtd_info *mtd) + int ret; + + spin_lock_irqsave(&ebu_lock, flags); +- ret = ltq_r8((void __iomem *)(nandaddr + NAND_READ_DATA)); ++ ret = ltq_r8((void __iomem *)(nandaddr | NAND_READ_DATA)); + spin_unlock_irqrestore(&ebu_lock, flags); + + return ret; + } + ++static void xway_read_buf(struct mtd_info *mtd, u_char *buf, int len) ++{ ++ struct nand_chip *this = mtd->priv; ++ unsigned long nandaddr = (unsigned long) this->IO_ADDR_R; ++ unsigned long flags; ++ int i; ++ ++ spin_lock_irqsave(&ebu_lock, flags); ++ for (i = 0; i < len; i++) ++ buf[i] = ltq_r8((void __iomem *)(nandaddr | NAND_READ_DATA)); ++ spin_unlock_irqrestore(&ebu_lock, flags); ++} ++ ++static void xway_write_buf(struct mtd_info *mtd, const u_char *buf, int len) ++{ ++ struct nand_chip *this = mtd->priv; ++ unsigned long nandaddr = (unsigned long) this->IO_ADDR_W; ++ unsigned long flags; ++ int i; ++ ++ spin_lock_irqsave(&ebu_lock, flags); ++ for (i = 0; i < len; i++) ++ ltq_w8(buf[i], (void __iomem *)nandaddr); ++ spin_unlock_irqrestore(&ebu_lock, flags); ++} ++ + static int xway_nand_probe(struct platform_device *pdev) + { + struct nand_chip *this = platform_get_drvdata(pdev); +@@ -175,6 +209,8 @@ static struct platform_nand_data xway_nand_data = { + .dev_ready = xway_dev_ready, + .select_chip = xway_select_chip, + .read_byte = xway_read_byte, ++ .read_buf = xway_read_buf, ++ .write_buf = xway_write_buf, + } + }; + +-- +1.7.10.4 + |