target/linux/brcm47xx/patches-3.3/029-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 +84,115 @@ 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 find_nvram_size(void)
  36 +{
  37 +       struct nvram_header header;
  38 +       int nvram_sizes[] = {NVRAM_SPACE, 0xF000, 2 * NVRAM_SPACE};
  39 +       int i;
  40 +       int ret;
  41 +
  42 +       for (i = 0; i < sizeof(nvram_sizes); i++) {
  43 +               ret = bcm47xx_sflash.read(&bcm47xx_sflash, bcm47xx_sflash.size - nvram_sizes[i], sizeof(header), (u8 *)&header);
  44 +               if (ret != sizeof(header))
  45 +                       return ret;
  46 +               if (header.magic == NVRAM_HEADER)
  47 +                       return nvram_sizes[i];
  48 +       }
  49 +       return -1;
  50 +}
  51 +
  52 +static int early_nvram_init_sflash(void)
  53 +{
  54 +       u32 off;
  55 +       int ret;
  56 +       char *dst;
  57 +       int len;
  58 +       int size;
  59 +
  60 +       /* check if the struct is already initilized */
  61 +       if (!bcm47xx_sflash.size)
  62 +               return -1;
  63 +
  64 +       size = find_nvram_size();
  65 +       if (size <= 0)
  66 +               return size;
  67 +
  68 +       len = NVRAM_SPACE;
  69 +       dst = nvram_buf;
  70 +       off = bcm47xx_sflash.size;
  71 +       if (size > len) {
  72 +               printk(KERN_WARNING "nvram on flash is bigger than the reserved"
  73 +                      " space in memory, will just copy the first %i bytes\n",
  74 +                      len);
  75 +       }
  76 +       while (len) {
  77 +               ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - size, len, dst);
  78 +               if (ret < 0)
  79 +                       return ret;
  80 +               off += ret;
  81 +               len -= ret;
  82 +               dst += ret;
  83 +       }
  84 +       return 0;
  85 +}
  86 +
  87 +#ifdef CONFIG_BCM47XX_SSB
  88 +static void early_nvram_init_ssb(void)
  89 +{
  90 +       int err;
  91 +
  92 +       switch (bcm47xx_bus.ssb.chipco.flash_type) {
  93 +       case SSB_PFLASH:
  94 +               early_nvram_init_pflash();
  95 +               break;
  96 +       case SSB_SFLASH:
  97 +               err = early_nvram_init_sflash();
  98 +               if (err < 0)
  99 +                       printk(KERN_WARNING "can not read from flash: %i\n", err);
 100 +               break;
 101 +       default:
 102 +               printk(KERN_WARNING "unknow flash type\n");
 103 +       }
 104 +}
 105 +#endif
 106 +
 107 +#ifdef CONFIG_BCM47XX_BCMA
 108 +static void early_nvram_init_bcma(void)
 109 +{
 110 +       int err;
 111 +
 112 +       switch (bcm47xx_bus.bcma.bus.drv_cc.flash_type) {
 113 +       case BCMA_PFLASH:
 114 +               early_nvram_init_pflash();
 115 +               break;
 116 +       case BCMA_SFLASH:
 117 +               err = early_nvram_init_sflash();
 118 +               if (err < 0)
 119 +                       printk(KERN_WARNING "can not read from flash: %i\n", err);
 120 +               break;
 121 +       default:
 122 +               printk(KERN_WARNING "unknow flash type\n");
 123 +       }
 124 +}
 125 +#endif
 126 +
 127 +static void early_nvram_init(void)
 128 +{
 129 +       switch (bcm47xx_bus_type) {
 130 +#ifdef CONFIG_BCM47XX_SSB
 131 +       case BCM47XX_BUS_TYPE_SSB:
 132 +               early_nvram_init_ssb();
 133 +               break;
 134 +#endif
 135 +#ifdef CONFIG_BCM47XX_BCMA
 136 +       case BCM47XX_BUS_TYPE_BCMA:
 137 +               early_nvram_init_bcma();
 138 +               break;
 139 +#endif
 140 +       }
 141  }
 142
 143  int nvram_getenv(char *name, char *val, size_t val_len)