package/boot/uboot-lantiq/patches/0005-sf-factor-out-the-flash-address-calculation.patch

   1 From acb2721e1cd2e7488a7b08a4ed590177369a1689 Mon Sep 17 00:00:00 2001
   2 From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   3 Date: Tue, 6 Nov 2012 19:10:40 +0100
   4 Subject: sf: factor out the flash address calculation
   5
   6 Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   7
   8 --- a/drivers/mtd/spi/spi_flash.c
   9 +++ b/drivers/mtd/spi/spi_flash.c
  10 @@ -15,12 +15,22 @@
  11
  12  #include "spi_flash_internal.h"
  13
  14 -static void spi_flash_addr(u32 addr, u8 *cmd)
  15 +static void spi_flash_addr(struct spi_flash *flash, u32 addr, u8 *cmd, u8 *cmd_len)
  16  {
  17         /* cmd[0] is actual command */
  18         cmd[1] = addr >> 16;
  19         cmd[2] = addr >> 8;
  20         cmd[3] = addr >> 0;
  21 +       *cmd_len = 4;
  22 +}
  23 +
  24 +static void spi_flash_page_addr(struct spi_flash *flash, u32 page_addr, u32 byte_addr, u8 *cmd, u8 *cmd_len)
  25 +{
  26 +       /* cmd[0] is actual command */
  27 +       cmd[1] = page_addr >> 8;
  28 +       cmd[2] = page_addr >> 0;
  29 +       cmd[3] = byte_addr;
  30 +       *cmd_len = 4;
  31  }
  32
  33  static int spi_flash_read_write(struct spi_slave *spi,
  34 @@ -71,7 +81,7 @@ int spi_flash_cmd_write_multi(struct spi
  35         unsigned long page_addr, byte_addr, page_size;
  36         size_t chunk_len, actual;
  37         int ret;
  38 -       u8 cmd[4];
  39 +       u8 cmd[4], cmd_len;
  40
  41         page_size = flash->page_size;
  42         page_addr = offset / page_size;
  43 @@ -87,9 +97,7 @@ int spi_flash_cmd_write_multi(struct spi
  44         for (actual = 0; actual < len; actual += chunk_len) {
  45                 chunk_len = min(len - actual, page_size - byte_addr);
  46
  47 -               cmd[1] = page_addr >> 8;
  48 -               cmd[2] = page_addr;
  49 -               cmd[3] = byte_addr;
  50 +               spi_flash_page_addr(flash, page_addr, byte_addr, cmd, &cmd_len);
  51
  52                 debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
  53                       buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
  54 @@ -100,7 +108,7 @@ int spi_flash_cmd_write_multi(struct spi
  55                         break;
  56                 }
  57
  58 -               ret = spi_flash_cmd_write(flash->spi, cmd, 4,
  59 +               ret = spi_flash_cmd_write(flash->spi, cmd, cmd_len,
  60                                           buf + actual, chunk_len);
  61                 if (ret < 0) {
  62                         debug("SF: write failed\n");
  63 @@ -138,13 +146,13 @@ int spi_flash_read_common(struct spi_fla
  64  int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
  65                 size_t len, void *data)
  66  {
  67 -       u8 cmd[5];
  68 +       u8 cmd[5], cmd_len;
  69
  70         cmd[0] = CMD_READ_ARRAY_FAST;
  71 -       spi_flash_addr(offset, cmd);
  72 -       cmd[4] = 0x00;
  73 +       spi_flash_addr(flash, offset, cmd, &cmd_len);
  74 +       cmd[cmd_len] = 0x00;
  75
  76 -       return spi_flash_read_common(flash, cmd, sizeof(cmd), data, len);
  77 +       return spi_flash_read_common(flash, cmd, cmd_len + 1, data, len);
  78  }
  79
  80  int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
  81 @@ -194,7 +202,7 @@ int spi_flash_cmd_erase(struct spi_flash
  82  {
  83         u32 start, end, erase_size;
  84         int ret;
  85 -       u8 cmd[4];
  86 +       u8 cmd[4], cmd_len;
  87
  88         erase_size = flash->sector_size;
  89         if (offset % erase_size || len % erase_size) {
  90 @@ -216,7 +224,7 @@ int spi_flash_cmd_erase(struct spi_flash
  91         end = start + len;
  92
  93         while (offset < end) {
  94 -               spi_flash_addr(offset, cmd);
  95 +               spi_flash_addr(flash, offset, cmd, &cmd_len);
  96                 offset += erase_size;
  97
  98                 debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
  99 @@ -226,7 +234,7 @@ int spi_flash_cmd_erase(struct spi_flash
 100                 if (ret)
 101                         goto out;
 102
 103 -               ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
 104 +               ret = spi_flash_cmd_write(flash->spi, cmd, cmd_len, NULL, 0);
 105                 if (ret)
 106                         goto out;
 107