target/linux/lantiq/patches-4.4/0016-MTD-lantiq-xway-add-missing-write_buf-and-read_buf-t.patch

   1 From 65df9d63eaee02c25e879b33dd42aceb78e57842 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 16/36] 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 --- a/drivers/mtd/nand/xway_nand.c
  13 +++ b/drivers/mtd/nand/xway_nand.c
  14 @@ -136,6 +136,32 @@ static unsigned char xway_read_byte(stru
  15         return ret;
  16  }
  17
  18 +static void xway_read_buf(struct mtd_info *mtd, u_char *buf, int len)
  19 +{
  20 +       struct nand_chip *this = mtd->priv;
  21 +       unsigned long nandaddr = (unsigned long) this->IO_ADDR_R;
  22 +       unsigned long flags;
  23 +       int i;
  24 +
  25 +       spin_lock_irqsave(&ebu_lock, flags);
  26 +       for (i = 0; i < len; i++)
  27 +               buf[i] = ltq_r8((void __iomem *)(nandaddr | NAND_READ_DATA));
  28 +       spin_unlock_irqrestore(&ebu_lock, flags);
  29 +}
  30 +
  31 +static void xway_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
  32 +{
  33 +       struct nand_chip *this = mtd->priv;
  34 +       unsigned long nandaddr = (unsigned long) this->IO_ADDR_W;
  35 +       unsigned long flags;
  36 +       int i;
  37 +
  38 +       spin_lock_irqsave(&ebu_lock, flags);
  39 +       for (i = 0; i < len; i++)
  40 +               ltq_w8(buf[i], (void __iomem *)(nandaddr | NAND_WRITE_DATA));
  41 +       spin_unlock_irqrestore(&ebu_lock, flags);
  42 +}
  43 +
  44  static int xway_nand_probe(struct platform_device *pdev)
  45  {
  46         struct nand_chip *this = platform_get_drvdata(pdev);
  47 @@ -177,6 +203,8 @@ static struct platform_nand_data xway_na
  48                 .dev_ready      = xway_dev_ready,
  49                 .select_chip    = xway_select_chip,
  50                 .read_byte      = xway_read_byte,
  51 +               .read_buf       = xway_read_buf,
  52 +               .write_buf      = xway_write_buf,
  53         }
  54  };
  55