target/linux/mvebu/patches-3.10/0145-mtd-nand-pxa3xx-Add-helper-function-to-set-page-addr.patch

   1 From 09a84f8e89c3715160423701b0606ef99e2a05bf Mon Sep 17 00:00:00 2001
   2 From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
   3 Date: Thu, 14 Nov 2013 18:25:31 -0300
   4 Subject: [PATCH 145/203] mtd: nand: pxa3xx: Add helper function to set page
   5  address
   6
   7 Let's simplify the code by first introducing a helper function
   8 to set the page address, as done by the READ0, READOOB and SEQIN
   9 commands.
  10
  11 Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
  12 Tested-by: Daniel Mack <zonque@gmail.com>
  13 Signed-off-by: Brian Norris <computersforpeace@gmail.com>
  14 ---
  15  drivers/mtd/nand/pxa3xx_nand.c | 36 +++++++++++++++++++++---------------
  16  1 file changed, 21 insertions(+), 15 deletions(-)
  17
  18 --- a/drivers/mtd/nand/pxa3xx_nand.c
  19 +++ b/drivers/mtd/nand/pxa3xx_nand.c
  20 @@ -587,6 +587,26 @@ static inline int is_buf_blank(uint8_t *
  21         return 1;
  22  }
  23
  24 +static void set_command_address(struct pxa3xx_nand_info *info,
  25 +               unsigned int page_size, uint16_t column, int page_addr)
  26 +{
  27 +       /* small page addr setting */
  28 +       if (page_size < PAGE_CHUNK_SIZE) {
  29 +               info->ndcb1 = ((page_addr & 0xFFFFFF) << 8)
  30 +                               | (column & 0xFF);
  31 +
  32 +               info->ndcb2 = 0;
  33 +       } else {
  34 +               info->ndcb1 = ((page_addr & 0xFFFF) << 16)
  35 +                               | (column & 0xFFFF);
  36 +
  37 +               if (page_addr & 0xFF0000)
  38 +                       info->ndcb2 = (page_addr & 0xFF0000) >> 16;
  39 +               else
  40 +                       info->ndcb2 = 0;
  41 +       }
  42 +}
  43 +
  44  static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
  45                 uint16_t column, int page_addr)
  46  {
  47 @@ -650,22 +670,8 @@ static int prepare_command_pool(struct p
  48                         info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8);
  49
  50         case NAND_CMD_SEQIN:
  51 -               /* small page addr setting */
  52 -               if (unlikely(mtd->writesize < PAGE_CHUNK_SIZE)) {
  53 -                       info->ndcb1 = ((page_addr & 0xFFFFFF) << 8)
  54 -                                       | (column & 0xFF);
  55 -
  56 -                       info->ndcb2 = 0;
  57 -               } else {
  58 -                       info->ndcb1 = ((page_addr & 0xFFFF) << 16)
  59 -                                       | (column & 0xFFFF);
  60 -
  61 -                       if (page_addr & 0xFF0000)
  62 -                               info->ndcb2 = (page_addr & 0xFF0000) >> 16;
  63 -                       else
  64 -                               info->ndcb2 = 0;
  65 -               }
  66
  67 +               set_command_address(info, mtd->writesize, column, page_addr);
  68                 info->buf_count = mtd->writesize + mtd->oobsize;
  69                 memset(info->data_buff, 0xFF, info->buf_count);
  70