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 diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
   9 index 732ddf8..c5e8eb1 100644
  10 --- a/drivers/mtd/spi/sf_internal.h
  11 +++ b/drivers/mtd/spi/sf_internal.h
  12 @@ -38,12 +38,14 @@
  13  #define CMD_READ_ID                    0x9f
  14
  15  /* Bank addr access commands */
  16 -#ifdef CONFIG_SPI_FLASH_BAR
  17 -# define CMD_BANKADDR_BRWR             0x17
  18 -# define CMD_BANKADDR_BRRD             0x16
  19 -# define CMD_EXTNADDR_WREAR            0xC5
  20 -# define CMD_EXTNADDR_RDEAR            0xC8
  21 -#endif
  22 +#define CMD_BANKADDR_BRWR              0x17
  23 +#define CMD_BANKADDR_BRRD              0x16
  24 +#define CMD_EXTNADDR_WREAR             0xC5
  25 +#define CMD_EXTNADDR_RDEAR             0xC8
  26 +
  27 +/* Macronix style 4-byte addressing */
  28 +#define CMD_EN4B                       0xb7
  29 +#define CMD_EX4B                       0xe9
  30
  31  /* Common status */
  32  #define STATUS_WIP                     0x01
  33 diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
  34 index 207adf5..1d072f8 100644
  35 --- a/drivers/mtd/spi/sf_ops.c
  36 +++ b/drivers/mtd/spi/sf_ops.c
  37 @@ -21,6 +21,7 @@ static void spi_flash_addr(const struct spi_flash *flash, u32 addr, u8 *cmd)
  38         cmd[1] = addr >> (flash->addr_width * 8 - 8);
  39         cmd[2] = addr >> (flash->addr_width * 8 - 16);
  40         cmd[3] = addr >> (flash->addr_width * 8 - 24);
  41 +       cmd[4] = addr >> (flash->addr_width * 8 - 32);
  42  }
  43
  44  static int spi_flash_cmdsz(const struct spi_flash *flash)
  45 @@ -163,7 +164,7 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
  46  int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len)
  47  {
  48         u32 erase_size;
  49 -       u8 cmd[4], cmd_len;
  50 +       u8 cmd[5], cmd_len;
  51         int ret = -1;
  52
  53         erase_size = flash->erase_size;
  54 @@ -188,8 +189,8 @@ int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len)
  55                 spi_flash_addr(flash, offset, cmd);
  56                 cmd_len = spi_flash_cmdsz(flash);
  57
  58 -               debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
  59 -                     cmd[2], cmd[3], offset);
  60 +               debug("SF: erase %2x %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
  61 +                     cmd[2], cmd[3], cmd[4], offset);
  62
  63                 ret = spi_flash_write_common(flash, cmd, cmd_len, NULL, 0);
  64                 if (ret < 0) {
  65 @@ -212,7 +213,7 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
  66  {
  67         unsigned long byte_addr, page_size;
  68         size_t chunk_len, actual;
  69 -       u8 cmd[4], cmd_len;
  70 +       u8 cmd[5], cmd_len;
  71         int ret = -1;
  72
  73         ret = spi_claim_bus(flash->spi);
  74 @@ -239,8 +240,8 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
  75                 spi_flash_addr(flash, offset, cmd);
  76                 cmd_len = spi_flash_cmdsz(flash);
  77
  78 -               debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
  79 -                     buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
  80 +               debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x%02x } chunk_len = %zu\n",
  81 +                     buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], chunk_len);
  82
  83                 ret = spi_flash_write_common(flash, cmd, cmd_len,
  84                                         buf + actual, chunk_len);
  85 @@ -276,9 +277,13 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
  86  int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
  87                 size_t len, void *data)
  88  {
  89 -       u8 cmd[5], cmd_len, bank_sel = 0;
  90 -       u32 remain_len, read_len;
  91 +       u8 cmd[6], cmd_len;
  92 +       u32 read_len;
  93         int ret = -1;
  94 +#ifdef CONFIG_SPI_FLASH_BAR
  95 +       u8 bank_sel = 0;
  96 +       u32 remain_len;
  97 +#endif
  98
  99         ret = spi_claim_bus(flash->spi);
 100         if (ret) {
 101 @@ -305,12 +310,15 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
 102                         debug("SF: fail to set bank%d\n", bank_sel);
 103                         goto done;
 104                 }
 105 -#endif
 106 +
 107                 remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1)) - offset;
 108                 if (len < remain_len)
 109                         read_len = len;
 110                 else
 111                         read_len = remain_len;
 112 +#else
 113 +               read_len = len;
 114 +#endif
 115
 116                 spi_flash_addr(flash, offset, cmd);
 117                 cmd_len = spi_flash_cmdsz(flash);
 118 diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
 119 index 84289db..ac44287 100644
 120 --- a/drivers/mtd/spi/sf_probe.c
 121 +++ b/drivers/mtd/spi/sf_probe.c
 122 @@ -153,6 +153,25 @@ static const struct spi_flash_params spi_flash_params_table[] = {
 123          */
 124  };
 125
 126 +int spi_flash_4byte_set(struct spi_flash *flash, u8 idcode0, int enable)
 127 +{
 128 +       u8 cmd, bankaddr;
 129 +
 130 +       switch (idcode0) {
 131 +       case 0xc2:
 132 +       case 0xef:
 133 +       case 0x1c:
 134 +               /* Macronix style */
 135 +               cmd = enable ? CMD_EN4B : CMD_EX4B;
 136 +               return spi_flash_cmd(flash->spi, cmd, NULL, 0);
 137 +       default:
 138 +               /* Spansion style */
 139 +               cmd = CMD_BANKADDR_BRWR;
 140 +               bankaddr = enable << 7;
 141 +               return spi_flash_cmd_write(flash->spi, &cmd, 1, &bankaddr, 1);
 142 +       }
 143 +}
 144 +
 145  static int spi_flash_validate_params(struct spi_flash *flash,
 146                 u8 *idcode)
 147  {
 148 @@ -218,8 +237,18 @@ static int spi_flash_validate_params(struct spi_flash *flash,
 149                 flash->poll_cmd = CMD_FLAG_STATUS;
 150  #endif
 151
 152 +#ifndef CONFIG_SPI_FLASH_BAR
 153 +       /* enable 4-byte addressing if the device exceeds 16MiB */
 154 +       if (flash->size > SPI_FLASH_16MB_BOUN) {
 155 +               flash->addr_width = 4;
 156 +               spi_flash_4byte_set(flash, idcode[0], 1);
 157 +       } else {
 158 +               flash->addr_width = 3;
 159 +       }
 160 +#else
 161         /* Configure default 3-byte addressing */
 162         flash->addr_width = 3;
 163 +#endif
 164
 165         /* Configure the BAR - discover bank cmds and read current bank */
 166  #ifdef CONFIG_SPI_FLASH_BAR
 167 --
 168 1.8.3.2
 169