target/linux/mvebu/patches-3.10/0118-mtd-nand-pxa3xx-Use-length-override-in-ONFI-paramate.patch

   1 From adbba4cf6ea15c2acb53e3fd9fc03c6b37f1f1fc Mon Sep 17 00:00:00 2001
   2 From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
   3 Date: Mon, 12 Aug 2013 14:14:51 -0300
   4 Subject: [PATCH 118/203] mtd: nand: pxa3xx: Use 'length override' in ONFI
   5  paramater page read
   6
   7 The ONFI command 'parameter page read' needs a non-standard length.
   8 Therefore, we enable the 'length override' field in NDCB0 and set
   9 a non-zero 'length count' in NDCB3.
  10
  11 Additionally, the 'spare enable' bit must be disabled for any command
  12 that sets a non-zero 'length count' in NDCB3.
  13
  14 Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
  15 Tested-by: Daniel Mack <zonque@gmail.com>
  16 Signed-off-by: Brian Norris <computersforpeace@gmail.com>
  17 Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
  18 ---
  19  drivers/mtd/nand/pxa3xx_nand.c | 6 ++++++
  20  1 file changed, 6 insertions(+)
  21
  22 --- a/drivers/mtd/nand/pxa3xx_nand.c
  23 +++ b/drivers/mtd/nand/pxa3xx_nand.c
  24 @@ -80,6 +80,7 @@
  25  #define NDSR_RDDREQ            (0x1 << 1)
  26  #define NDSR_WRCMDREQ          (0x1)
  27
  28 +#define NDCB0_LEN_OVRD         (0x1 << 28)
  29  #define NDCB0_ST_ROW_EN         (0x1 << 26)
  30  #define NDCB0_AUTO_RS          (0x1 << 25)
  31  #define NDCB0_CSEL             (0x1 << 24)
  32 @@ -562,6 +563,9 @@ static int prepare_command_pool(struct p
  33         case NAND_CMD_READOOB:
  34                 pxa3xx_set_datasize(info);
  35                 break;
  36 +       case NAND_CMD_PARAM:
  37 +               info->use_spare = 0;
  38 +               break;
  39         case NAND_CMD_SEQIN:
  40                 exec_cmd = 0;
  41                 break;
  42 @@ -637,8 +641,10 @@ static int prepare_command_pool(struct p
  43                 info->buf_count = 256;
  44                 info->ndcb0 |= NDCB0_CMD_TYPE(0)
  45                                 | NDCB0_ADDR_CYC(1)
  46 +                               | NDCB0_LEN_OVRD
  47                                 | cmd;
  48                 info->ndcb1 = (column & 0xFF);
  49 +               info->ndcb3 = 256;
  50                 info->data_size = 256;
  51                 break;
  52