target/linux/lantiq/patches-3.10/0018-MTD-lantiq-xway-add-missing-write_buf-and-read_buf-t.patch

   1 From 0e75433962d619e4f9dcab57643223d85db0b880 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Sun, 28 Jul 2013 17:59:51 +0200
   4 Subject: [PATCH 18/34] MTD: lantiq: xway: add missing write_buf and read_buf
   5  to nand driver
   6
   7 Signed-off-by: John Crispin <blogic@openwrt.org>
   8 ---
   9  drivers/mtd/nand/xway_nand.c |   28 ++++++++++++++++++++++++++++
  10  1 file changed, 28 insertions(+)
  11
  12 diff --git a/drivers/mtd/nand/xway_nand.c b/drivers/mtd/nand/xway_nand.c
  13 index 8d14f1b..f813a55 100644
  14 --- a/drivers/mtd/nand/xway_nand.c
  15 +++ b/drivers/mtd/nand/xway_nand.c
  16 @@ -136,6 +136,32 @@ static unsigned char xway_read_byte(struct mtd_info *mtd)
  17         return ret;
  18  }
  19
  20 +static void xway_read_buf(struct mtd_info *mtd, u_char *buf, int len)
  21 +{
  22 +       struct nand_chip *this = mtd->priv;
  23 +       unsigned long nandaddr = (unsigned long) this->IO_ADDR_R;
  24 +       unsigned long flags;
  25 +       int i;
  26 +
  27 +       spin_lock_irqsave(&ebu_lock, flags);
  28 +       for (i = 0; i < len; i++)
  29 +               buf[i] = ltq_r8((void __iomem *)(nandaddr | NAND_READ_DATA));
  30 +       spin_unlock_irqrestore(&ebu_lock, flags);
  31 +}
  32 +
  33 +static void xway_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
  34 +{
  35 +       struct nand_chip *this = mtd->priv;
  36 +       unsigned long nandaddr = (unsigned long) this->IO_ADDR_W;
  37 +       unsigned long flags;
  38 +       int i;
  39 +
  40 +       spin_lock_irqsave(&ebu_lock, flags);
  41 +       for (i = 0; i < len; i++)
  42 +               ltq_w8(buf[i], (void __iomem *)nandaddr);
  43 +       spin_unlock_irqrestore(&ebu_lock, flags);
  44 +}
  45 +
  46  static int xway_nand_probe(struct platform_device *pdev)
  47  {
  48         struct nand_chip *this = platform_get_drvdata(pdev);
  49 @@ -181,6 +207,8 @@ static struct platform_nand_data xway_nand_data = {
  50                 .dev_ready      = xway_dev_ready,
  51                 .select_chip    = xway_select_chip,
  52                 .read_byte      = xway_read_byte,
  53 +               .read_buf       = xway_read_buf,
  54 +               .write_buf      = xway_write_buf,
  55         }
  56  };
  57
  58 --
  59 1.7.10.4
  60