target/linux/brcm63xx/patches-3.8/436-MTD-bcm63xxpart-allow-passing-a-caldata-offset.patch

   1 Allow bcm63xxpart to receive a caldata offset if calibration data is
   2 contained in flash.
   3 ---
   4  drivers/mtd/bcm63xxpart.c      |   51 ++++++++++++++++++++++++++++++++++++---
   5  include/linux/mtd/partitions.h |    2 +
   6  2 files changed, 49 insertions(+), 4 deletions(-)
   7
   8 --- a/drivers/mtd/bcm63xxpart.c
   9 +++ b/drivers/mtd/bcm63xxpart.c
  10 @@ -76,10 +76,12 @@ static int bcm63xx_parse_cfe_partitions(
  11         struct mtd_partition *parts;
  12         int ret;
  13         size_t retlen;
  14 -       unsigned int rootfsaddr, kerneladdr, spareaddr;
  15 +       unsigned int rootfsaddr, kerneladdr, spareaddr, nvramaddr;
  16         unsigned int rootfslen, kernellen, sparelen, totallen;
  17         unsigned int cfelen, nvramlen;
  18         unsigned int cfe_erasesize;
  19 +       unsigned int caldatalen1 = 0, caldataaddr1 = 0;
  20 +       unsigned int caldatalen2 = 0, caldataaddr2 = 0;
  21         int i;
  22         u32 computed_crc;
  23         bool rootfs_first = false;
  24 @@ -93,6 +95,24 @@ static int bcm63xx_parse_cfe_partitions(
  25         cfelen = cfe_erasesize;
  26         nvramlen = bcm63xx_nvram_get_psi_size() * 1024;
  27         nvramlen = roundup(nvramlen, cfe_erasesize);
  28 +       nvramaddr = master->size - nvramlen;
  29 +
  30 +       if (data) {
  31 +               if (data->caldata[0]) {
  32 +                       caldatalen1 = cfe_erasesize;
  33 +                       caldataaddr1 = rounddown(data->caldata[0],
  34 +                                                cfe_erasesize);
  35 +               }
  36 +               if (data->caldata[1]) {
  37 +                       caldatalen2 = cfe_erasesize;
  38 +                       caldataaddr2 = rounddown(data->caldata[1],
  39 +                                                cfe_erasesize);
  40 +               }
  41 +               if (caldataaddr1 == caldataaddr2) {
  42 +                       caldataaddr2 = 0;
  43 +                       caldatalen2 = 0;
  44 +               }
  45 +       }
  46
  47         /* Allocate memory for buffer */
  48         buf = vmalloc(sizeof(struct bcm_tag));
  49 @@ -144,7 +164,7 @@ static int bcm63xx_parse_cfe_partitions(
  50                 rootfsaddr = 0;
  51                 spareaddr = cfelen;
  52         }
  53 -       sparelen = master->size - spareaddr - nvramlen;
  54 +       sparelen = min_not_zero(nvramaddr, caldataaddr1) - spareaddr;
  55
  56         /* Determine number of partitions */
  57         if (rootfslen > 0)
  58 @@ -153,6 +173,12 @@ static int bcm63xx_parse_cfe_partitions(
  59         if (kernellen > 0)
  60                 nrparts++;
  61
  62 +       if (caldatalen1 > 0)
  63 +               nrparts++;
  64 +
  65 +       if (caldatalen2 > 0)
  66 +               nrparts++;
  67 +
  68         /* Ask kernel for more memory */
  69         parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
  70         if (!parts) {
  71 @@ -190,15 +216,32 @@ static int bcm63xx_parse_cfe_partitions(
  72                 curpart++;
  73         }
  74
  75 +       if (caldatalen1 > 0) {
  76 +               if (caldatalen2 > 0)
  77 +                       parts[curpart].name = "cal_data1";
  78 +               else
  79 +                       parts[curpart].name = "cal_data";
  80 +               parts[curpart].offset = caldataaddr1;
  81 +               parts[curpart].size = caldatalen1;
  82 +               curpart++;
  83 +       }
  84 +
  85 +       if (caldatalen2 > 0) {
  86 +               parts[curpart].name = "cal_data2";
  87 +               parts[curpart].offset = caldataaddr2;
  88 +               parts[curpart].size = caldatalen2;
  89 +               curpart++;
  90 +       }
  91 +
  92         parts[curpart].name = "nvram";
  93 -       parts[curpart].offset = master->size - nvramlen;
  94 +       parts[curpart].offset = nvramaddr;
  95         parts[curpart].size = nvramlen;
  96         curpart++;
  97
  98         /* Global partition "linux" to make easy firmware upgrade */
  99         parts[curpart].name = "linux";
 100         parts[curpart].offset = cfelen;
 101 -       parts[curpart].size = master->size - cfelen - nvramlen;
 102 +       parts[curpart].size = min_not_zero(nvramaddr, caldataaddr1) - cfelen;
 103
 104         for (i = 0; i < nrparts; i++)
 105                 pr_info("Partition %d is %s offset %llx and length %llx\n", i,
 106 --- a/include/linux/mtd/partitions.h
 107 +++ b/include/linux/mtd/partitions.h
 108 @@ -58,10 +58,12 @@ struct device_node;
 109  /**
 110   * struct mtd_part_parser_data - used to pass data to MTD partition parsers.
 111   * @origin: for RedBoot, start address of MTD device
 112 + * @caldata: for CFE, start address of wifi calibration data
 113   * @of_node: for OF parsers, device node containing partitioning information
 114   */
 115  struct mtd_part_parser_data {
 116         unsigned long origin;
 117 +       unsigned long caldata[2];
 118         struct device_node *of_node;
 119  };
 120