target/linux/brcm47xx/patches-3.2/029-bcm47xx-read-nvram-from-sflash.patch

   1 --- a/arch/mips/bcm47xx/nvram.c
   2 +++ b/arch/mips/bcm47xx/nvram.c
   3 @@ -20,11 +20,12 @@
   4  #include <asm/addrspace.h>
   5  #include <asm/mach-bcm47xx/nvram.h>
   6  #include <asm/mach-bcm47xx/bcm47xx.h>
   7 +#include <asm/mach-bcm47xx/bus.h>
   8
   9  static char nvram_buf[NVRAM_SPACE];
  10
  11  /* Probe for NVRAM header */
  12 -static void early_nvram_init(void)
  13 +static void early_nvram_init_pflash(void)
  14  {
  15  #ifdef CONFIG_BCM47XX_SSB
  16         struct ssb_chipcommon *ssb_cc;
  17 @@ -50,9 +51,6 @@ static void early_nvram_init(void)
  18  #ifdef CONFIG_BCM47XX_BCMA
  19         case BCM47XX_BUS_TYPE_BCMA:
  20                 bcma_cc = &bcm47xx_bus.bcma.bus.drv_cc;
  21 -               if (bcma_cc->flash_type != BCMA_PFLASH)
  22 -                       return;
  23 -
  24                 base = bcma_cc->pflash.window;
  25                 lim = bcma_cc->pflash.window_size;
  26                 break;
  27 @@ -86,7 +84,110 @@ found:
  28         for (i = 0; i < sizeof(struct nvram_header); i += 4)
  29                 *dst++ = *src++;
  30         for (; i < header->len && i < NVRAM_SPACE; i += 4)
  31 -               *dst++ = le32_to_cpu(*src++);
  32 +               *dst++ = *src++;
  33 +}
  34 +
  35 +static int early_nvram_init_sflash(void)
  36 +{
  37 +       struct nvram_header header;
  38 +       u32 off;
  39 +       int ret;
  40 +       char *dst;
  41 +       int len;
  42 +
  43 +       /* check if the struct is already initilized */
  44 +       if (!bcm47xx_sflash.size)
  45 +               return -1;
  46 +
  47 +       off = FLASH_MIN;
  48 +       while (off <= bcm47xx_sflash.size) {
  49 +               ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - NVRAM_SPACE, sizeof(header), (u8 *)&header);
  50 +               if (ret != sizeof(header))
  51 +                       return ret;
  52 +               if (header.magic == NVRAM_HEADER)
  53 +                       goto found;
  54 +               off <<= 1;
  55 +       }
  56 +
  57 +       off = FLASH_MIN;
  58 +       while (off <= bcm47xx_sflash.size) {
  59 +               ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - (2 * NVRAM_SPACE), sizeof(header), (u8 *)&header);
  60 +               if (ret != sizeof(header))
  61 +                       return ret;
  62 +               if (header.magic == NVRAM_HEADER)
  63 +                       goto found;
  64 +               off <<= 1;
  65 +       }
  66 +       return -1;
  67 +
  68 +found:
  69 +       len = NVRAM_SPACE;
  70 +       dst = nvram_buf;
  71 +       while (len) {
  72 +               ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - (2 * NVRAM_SPACE), len, dst);
  73 +               if (ret < 0)
  74 +                       return ret;
  75 +               off += ret;
  76 +               len -= ret;
  77 +               dst += ret;
  78 +       }
  79 +       return 0;
  80 +}
  81 +
  82 +#ifdef CONFIG_BCM47XX_SSB
  83 +static void early_nvram_init_ssb(void)
  84 +{
  85 +       int err;
  86 +
  87 +       switch (bcm47xx_bus.ssb.chipco.flash_type) {
  88 +       case SSB_PFLASH:
  89 +               early_nvram_init_pflash();
  90 +               break;
  91 +       case SSB_SFLASH:
  92 +               err = early_nvram_init_sflash();
  93 +               if (err < 0)
  94 +                       printk(KERN_WARNING "can not read from flash: %i\n", err);
  95 +               break;
  96 +       default:
  97 +               printk(KERN_WARNING "unknow flash type\n");
  98 +       }
  99 +}
 100 +#endif
 101 +
 102 +#ifdef CONFIG_BCM47XX_BCMA
 103 +static void early_nvram_init_bcma(void)
 104 +{
 105 +       int err;
 106 +
 107 +       switch (bcm47xx_bus.bcma.bus.drv_cc.flash_type) {
 108 +       case BCMA_PFLASH:
 109 +               early_nvram_init_pflash();
 110 +               break;
 111 +       case BCMA_SFLASH:
 112 +               err = early_nvram_init_sflash();
 113 +               if (err < 0)
 114 +                       printk(KERN_WARNING "can not read from flash: %i\n", err);
 115 +               break;
 116 +       default:
 117 +               printk(KERN_WARNING "unknow flash type\n");
 118 +       }
 119 +}
 120 +#endif
 121 +
 122 +static void early_nvram_init(void)
 123 +{
 124 +       switch (bcm47xx_bus_type) {
 125 +#ifdef CONFIG_BCM47XX_SSB
 126 +       case BCM47XX_BUS_TYPE_SSB:
 127 +               early_nvram_init_ssb();
 128 +               break;
 129 +#endif
 130 +#ifdef CONFIG_BCM47XX_BCMA
 131 +       case BCM47XX_BUS_TYPE_BCMA:
 132 +               early_nvram_init_bcma();
 133 +               break;
 134 +#endif
 135 +       }
 136  }
 137
 138  int nvram_getenv(char *name, char *val, size_t val_len)