package/boot/uboot-lantiq/patches/0006-sf-add-support-for-4-byte-addressing.patch

   1 From 3af3addee645bd81537be1ddee49969f8dfc64ee Mon Sep 17 00:00:00 2001
   2 From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   3 Date: Sun, 13 Oct 2013 15:24:56 +0200
   4 Subject: sf: add support for 4-byte addressing
   5
   6 Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
   7
   8 --- a/drivers/mtd/spi/sf_internal.h
   9 +++ b/drivers/mtd/spi/sf_internal.h
  10 @@ -38,12 +38,14 @@
  11  #define CMD_READ_ID                    0x9f
  12
  13  /* Bank addr access commands */
  14 -#ifdef CONFIG_SPI_FLASH_BAR
  15 -# define CMD_BANKADDR_BRWR             0x17
  16 -# define CMD_BANKADDR_BRRD             0x16
  17 -# define CMD_EXTNADDR_WREAR            0xC5
  18 -# define CMD_EXTNADDR_RDEAR            0xC8
  19 -#endif
  20 +#define CMD_BANKADDR_BRWR              0x17
  21 +#define CMD_BANKADDR_BRRD              0x16
  22 +#define CMD_EXTNADDR_WREAR             0xC5
  23 +#define CMD_EXTNADDR_RDEAR             0xC8
  24 +
  25 +/* Macronix style 4-byte addressing */
  26 +#define CMD_EN4B                       0xb7
  27 +#define CMD_EX4B                       0xe9
  28
  29  /* Common status */
  30  #define STATUS_WIP                     0x01
  31 --- a/drivers/mtd/spi/sf_ops.c
  32 +++ b/drivers/mtd/spi/sf_ops.c
  33 @@ -21,6 +21,7 @@ static void spi_flash_addr(const struct
  34         cmd[1] = addr >> (flash->addr_width * 8 - 8);
  35         cmd[2] = addr >> (flash->addr_width * 8 - 16);
  36         cmd[3] = addr >> (flash->addr_width * 8 - 24);
  37 +       cmd[4] = addr >> (flash->addr_width * 8 - 32);
  38  }
  39
  40  static int spi_flash_cmdsz(const struct spi_flash *flash)
  41 @@ -163,7 +164,7 @@ int spi_flash_write_common(struct spi_fl
  42  int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len)
  43  {
  44         u32 erase_size;
  45 -       u8 cmd[4], cmd_len;
  46 +       u8 cmd[5], cmd_len;
  47         int ret = -1;
  48
  49         erase_size = flash->erase_size;
  50 @@ -188,8 +189,8 @@ int spi_flash_cmd_erase_ops(struct spi_f
  51                 spi_flash_addr(flash, offset, cmd);
  52                 cmd_len = spi_flash_cmdsz(flash);
  53
  54 -               debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
  55 -                     cmd[2], cmd[3], offset);
  56 +               debug("SF: erase %2x %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
  57 +                     cmd[2], cmd[3], cmd[4], offset);
  58
  59                 ret = spi_flash_write_common(flash, cmd, cmd_len, NULL, 0);
  60                 if (ret < 0) {
  61 @@ -212,7 +213,7 @@ int spi_flash_cmd_write_ops(struct spi_f
  62  {
  63         unsigned long byte_addr, page_size;
  64         size_t chunk_len, actual;
  65 -       u8 cmd[4], cmd_len;
  66 +       u8 cmd[5], cmd_len;
  67         int ret = -1;
  68
  69         ret = spi_claim_bus(flash->spi);
  70 @@ -239,8 +240,8 @@ int spi_flash_cmd_write_ops(struct spi_f
  71                 spi_flash_addr(flash, offset, cmd);
  72                 cmd_len = spi_flash_cmdsz(flash);
  73
  74 -               debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
  75 -                     buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
  76 +               debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x%02x } chunk_len = %zu\n",
  77 +                     buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], chunk_len);
  78
  79                 ret = spi_flash_write_common(flash, cmd, cmd_len,
  80                                         buf + actual, chunk_len);
  81 @@ -276,9 +277,13 @@ int spi_flash_read_common(struct spi_fla
  82  int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
  83                 size_t len, void *data)
  84  {
  85 -       u8 cmd[5], cmd_len, bank_sel = 0;
  86 -       u32 remain_len, read_len;
  87 +       u8 cmd[6], cmd_len;
  88 +       u32 read_len;
  89         int ret = -1;
  90 +#ifdef CONFIG_SPI_FLASH_BAR
  91 +       u8 bank_sel = 0;
  92 +       u32 remain_len;
  93 +#endif
  94
  95         ret = spi_claim_bus(flash->spi);
  96         if (ret) {
  97 @@ -305,12 +310,15 @@ int spi_flash_cmd_read_ops(struct spi_fl
  98                         debug("SF: fail to set bank%d\n", bank_sel);
  99                         goto done;
 100                 }
 101 -#endif
 102 +
 103                 remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1)) - offset;
 104                 if (len < remain_len)
 105                         read_len = len;
 106                 else
 107                         read_len = remain_len;
 108 +#else
 109 +               read_len = len;
 110 +#endif
 111
 112                 spi_flash_addr(flash, offset, cmd);
 113                 cmd_len = spi_flash_cmdsz(flash);
 114 --- a/drivers/mtd/spi/sf_probe.c
 115 +++ b/drivers/mtd/spi/sf_probe.c
 116 @@ -153,6 +153,25 @@ static const struct spi_flash_params spi
 117          */
 118  };
 119
 120 +int spi_flash_4byte_set(struct spi_flash *flash, u8 idcode0, int enable)
 121 +{
 122 +       u8 cmd, bankaddr;
 123 +
 124 +       switch (idcode0) {
 125 +       case 0xc2:
 126 +       case 0xef:
 127 +       case 0x1c:
 128 +               /* Macronix style */
 129 +               cmd = enable ? CMD_EN4B : CMD_EX4B;
 130 +               return spi_flash_cmd(flash->spi, cmd, NULL, 0);
 131 +       default:
 132 +               /* Spansion style */
 133 +               cmd = CMD_BANKADDR_BRWR;
 134 +               bankaddr = enable << 7;
 135 +               return spi_flash_cmd_write(flash->spi, &cmd, 1, &bankaddr, 1);
 136 +       }
 137 +}
 138 +
 139  static int spi_flash_validate_params(struct spi_flash *flash,
 140                 u8 *idcode)
 141  {
 142 @@ -218,8 +237,18 @@ static int spi_flash_validate_params(str
 143                 flash->poll_cmd = CMD_FLAG_STATUS;
 144  #endif
 145
 146 +#ifndef CONFIG_SPI_FLASH_BAR
 147 +       /* enable 4-byte addressing if the device exceeds 16MiB */
 148 +       if (flash->size > SPI_FLASH_16MB_BOUN) {
 149 +               flash->addr_width = 4;
 150 +               spi_flash_4byte_set(flash, idcode[0], 1);
 151 +       } else {
 152 +               flash->addr_width = 3;
 153 +       }
 154 +#else
 155         /* Configure default 3-byte addressing */
 156         flash->addr_width = 3;
 157 +#endif
 158
 159         /* Configure the BAR - discover bank cmds and read current bank */
 160  #ifdef CONFIG_SPI_FLASH_BAR