target/linux/brcm63xx/patches-3.2/040-bcm963xx_flashmap.patch

   1 From a4d005c91d403d9f3d0272db6cc46202c06ec774 Mon Sep 17 00:00:00 2001
   2 From: Axel Gembe <ago@bastart.eu.org>
   3 Date: Mon, 12 May 2008 18:54:09 +0200
   4 Subject: [PATCH] bcm963xx: flashmap support
   5
   6 Signed-off-by: Axel Gembe <ago@bastart.eu.org>
   7 ---
   8  arch/mips/bcm63xx/boards/board_bcm963xx.c |   19 +----------------
   9  drivers/mtd/maps/bcm963xx-flash.c         |   32 ++++++++++++++++++++++++----
  10  drivers/mtd/redboot.c                     |   13 +++++++++--
  11  3 files changed, 38 insertions(+), 26 deletions(-)
  12
  13 --- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
  14 +++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
  15 @@ -822,20 +822,6 @@ void __init board_setup(void)
  16                 panic("unexpected CPU for bcm963xx board");
  17  }
  18
  19 -static struct mtd_partition mtd_partitions[] = {
  20 -       {
  21 -               .name           = "cfe",
  22 -               .offset         = 0x0,
  23 -               .size           = 0x40000,
  24 -       }
  25 -};
  26 -
  27 -static struct physmap_flash_data flash_data = {
  28 -       .width                  = 2,
  29 -       .nr_parts               = ARRAY_SIZE(mtd_partitions),
  30 -       .parts                  = mtd_partitions,
  31 -};
  32 -
  33  static struct resource mtd_resources[] = {
  34         {
  35                 .start          = 0,    /* filled at runtime */
  36 @@ -845,12 +831,9 @@ static struct resource mtd_resources[] =
  37  };
  38
  39  static struct platform_device mtd_dev = {
  40 -       .name                   = "physmap-flash",
  41 +       .name                   = "bcm963xx-flash",
  42         .resource               = mtd_resources,
  43         .num_resources          = ARRAY_SIZE(mtd_resources),
  44 -       .dev                    = {
  45 -               .platform_data  = &flash_data,
  46 -       },
  47  };
  48
  49  static struct gpio_led_platform_data bcm63xx_led_data;
  50 --- a/drivers/mtd/maps/bcm963xx-flash.c
  51 +++ b/drivers/mtd/maps/bcm963xx-flash.c
  52 @@ -28,6 +28,8 @@
  53  #include <linux/vmalloc.h>
  54  #include <linux/platform_device.h>
  55  #include <linux/io.h>
  56 +#include <linux/magic.h>
  57 +#include <linux/jffs2.h>
  58
  59  #include <asm/mach-bcm63xx/bcm963xx_tag.h>
  60
  61 @@ -36,6 +38,14 @@
  62
  63  #define PFX KBUILD_MODNAME ": "
  64
  65 +struct squashfs_super_block {
  66 +       __le32 s_magic;
  67 +       __le32 pad0[9];
  68 +       __le64 bytes_used;
  69 +};
  70 +
  71 +extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
  72 +
  73  static struct mtd_partition *parsed_parts;
  74
  75  static struct mtd_info *bcm963xx_mtd_info;
  76 @@ -220,9 +230,21 @@ probe_ok:
  77                         }
  78                 }
  79         } else {
  80 -               dev_info(&pdev->dev, "unsupported bootloader\n");
  81 -               err = -ENODEV;
  82 -               goto err_probe;
  83 +               printk(KERN_INFO PFX "assuming RedBoot bootloader\n");
  84 +               if (bcm963xx_mtd_info->size > 0x00400000) {
  85 +                       printk(KERN_INFO PFX "Support for extended flash memory size : 0x%lx ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd_info->size);
  86 +                       bcm963xx_map.virt = (u32)(BCM63XX_EXTENDED_SIZE);
  87 +               }
  88 +
  89 +#ifdef CONFIG_MTD_REDBOOT_PARTS
  90 +               if (parsed_nr_parts == 0) {
  91 +                       int ret = parse_redboot_partitions(bcm963xx_mtd_info, &parsed_parts, 0);
  92 +                       if (ret > 0) {
  93 +                               part_type = "RedBoot";
  94 +                               parsed_nr_parts = ret;
  95 +                       }
  96 +               }
  97 +#endif
  98         }
  99
 100         return mtd_device_register(bcm963xx_mtd_info, parsed_parts,
 101 --- a/drivers/mtd/redboot.c
 102 +++ b/drivers/mtd/redboot.c
 103 @@ -58,7 +58,7 @@ static inline int redboot_checksum(struc
 104         return 1;
 105  }
 106
 107 -static int parse_redboot_partitions(struct mtd_info *master,
 108 +int parse_redboot_partitions(struct mtd_info *master,
 109                                     struct mtd_partition **pparts,
 110                                     struct mtd_part_parser_data *data)
 111  {
 112 @@ -75,6 +75,7 @@ static int parse_redboot_partitions(stru
 113         int nulllen = 0;
 114         int numslots;
 115         unsigned long offset;
 116 +       unsigned long fis_origin = 0;
 117  #ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
 118         static char nullstring[] = "unallocated";
 119  #endif
 120 @@ -181,6 +182,16 @@ static int parse_redboot_partitions(stru
 121                 goto out;
 122         }
 123
 124 +       if (data && data->origin) {
 125 +               fis_origin = data->origin;
 126 +       } else {
 127 +               for (i = 0; i < numslots; i++) {
 128 +                       if (!strncmp(buf[i].name, "RedBoot", 8)) {
 129 +                               fis_origin = (buf[i].flash_base & (master->size << 1) - 1);
 130 +                       }
 131 +               }
 132 +       }
 133 +
 134         for (i = 0; i < numslots; i++) {
 135                 struct fis_list *new_fl, **prev;
 136
 137 @@ -201,10 +212,10 @@ static int parse_redboot_partitions(stru
 138                         goto out;
 139                 }
 140                 new_fl->img = &buf[i];
 141 -               if (data && data->origin)
 142 -                       buf[i].flash_base -= data->origin;
 143 -               else
 144 -                       buf[i].flash_base &= master->size-1;
 145 +               if (fis_origin)
 146 +                       buf[i].flash_base -= fis_origin;
 147 +
 148 +               buf[i].flash_base &= (master->size << 1) - 1;
 149
 150                 /* I'm sure the JFFS2 code has done me permanent damage.
 151                  * I now think the following is _normal_