target/linux/brcm63xx-2.6/patches/040-bcm963xx_flashmap.patch

   1 diff -urN linux-2.6.16.7/drivers/mtd/maps/bcm963xx.c linux-2.6.16.7-brcm63xx/drivers/mtd/maps/bcm963xx.c
   2 --- linux-2.6.16.7/drivers/mtd/maps/bcm963xx.c  1970-01-01 01:00:00.000000000 +0100
   3 +++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/bcm963xx.c 2006-07-07 22:00:36.000000000 +0200
   4 @@ -0,0 +1,106 @@
   5 +/*
   6 + * A simple flash mapping code for BCM963xx board flash memory
   7 + * It is simple because it only treats all the flash memory as ROM
   8 + * It is used with chips/map_rom.c
   9 + *
  10 + *  Song Wang (songw@broadcom.com)
  11 + */
  12 +
  13 +#include <linux/module.h>
  14 +#include <linux/types.h>
  15 +#include <linux/kernel.h>
  16 +#include <linux/init.h>
  17 +#include <asm/io.h>
  18 +#include <linux/mtd/mtd.h>
  19 +#include <linux/mtd/map.h>
  20 +#include <linux/config.h>
  21 +
  22 +#include <board.h>
  23 +#include <bcmTag.h>
  24 +#define  VERSION       "1.0"
  25 +
  26 +extern PFILE_TAG kerSysImageTagGet(void);
  27 +
  28 +static struct mtd_info *mymtd;
  29 +
  30 +static map_word brcm_physmap_read16(struct map_info *map, unsigned long ofs)
  31 +{
  32 +       map_word val;
  33 +
  34 +       val.x[0] = __raw_readw(map->map_priv_1 + ofs);
  35 +
  36 +       return val;
  37 +}
  38 +
  39 +static void brcm_physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
  40 +{
  41 +       memcpy_fromio(to, map->map_priv_1 + from, len);
  42 +}
  43 +
  44 +static struct map_info brcm_physmap_map = {
  45 +       .name           = "Physically mapped flash",
  46 +       .bankwidth      = 2,
  47 +       .read           = brcm_physmap_read16,
  48 +       .copy_from      = brcm_physmap_copy_from
  49 +};
  50 +
  51 +static int __init init_brcm_physmap(void)
  52 +{
  53 +        PFILE_TAG pTag = NULL;
  54 +        u_int32_t rootfs_addr, kernel_addr;
  55 +        FLASH_ADDR_INFO info;
  56 +
  57 +       printk("bcm963xx_mtd driver v%s\n", VERSION);
  58 +        kerSysFlashAddrInfoGet( &info );
  59 +
  60 +        /* Read the flash memory map from flash memory. */
  61 +        if (!(pTag = kerSysImageTagGet())) {
  62 +                printk("Failed to read image tag from flash\n");
  63 +                return -EIO;
  64 +        }
  65 +
  66 +        rootfs_addr = (u_int32_t) simple_strtoul(pTag->rootfsAddress, NULL, 10);
  67 +        kernel_addr = (u_int32_t) simple_strtoul(pTag->kernelAddress, NULL, 10);
  68 +
  69 +       brcm_physmap_map.size = kernel_addr - rootfs_addr;
  70 +       brcm_physmap_map.map_priv_1 = (unsigned long)rootfs_addr;
  71 +
  72 +       if (!brcm_physmap_map.map_priv_1) {
  73 +               printk("Wrong rootfs starting address\n");
  74 +               return -EIO;
  75 +       }
  76 +
  77 +       if (brcm_physmap_map.size <= 0) {
  78 +               printk("Wrong rootfs size\n");
  79 +               return -EIO;
  80 +       }
  81 +
  82 +       mymtd = do_map_probe("map_rom", &brcm_physmap_map);
  83 +       if (mymtd) {
  84 +               mymtd->owner = THIS_MODULE;
  85 +               add_mtd_device(mymtd);
  86 +
  87 +               return 0;
  88 +       }
  89 +
  90 +       return -ENXIO;
  91 +}
  92 +
  93 +static void __exit cleanup_brcm_physmap(void)
  94 +{
  95 +       if (mymtd) {
  96 +               del_mtd_device(mymtd);
  97 +               map_destroy(mymtd);
  98 +       }
  99 +       if (brcm_physmap_map.map_priv_1) {
 100 +               brcm_physmap_map.map_priv_1 = 0;
 101 +       }
 102 +}
 103 +
 104 +module_init(init_brcm_physmap);
 105 +module_exit(cleanup_brcm_physmap);
 106 +
 107 +
 108 +MODULE_LICENSE("GPL");
 109 +MODULE_AUTHOR("Song Wang songw@broadcom.com");
 110 +MODULE_DESCRIPTION("Configurable MTD map driver for read-only root file system");
 111 diff -urN linux-2.6.16.7/drivers/mtd/maps/Kconfig linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Kconfig
 112 --- linux-2.6.16.7/drivers/mtd/maps/Kconfig     2006-04-17 23:53:25.000000000 +0200
 113 +++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Kconfig    2006-07-07 22:02:13.000000000 +0200
 114 @@ -224,6 +224,13 @@
 115           Flash memory access on 4G Systems MTX-1 Board. If you have one of
 116           these boards and would like to use the flash chips on it, say 'Y'.
 117
 118 +config MTD_BCM963XX
 119 +       tristate "BCM963xx Flash device"
 120 +       depends on MIPS && MIPS_BRCM
 121 +       help
 122 +         This driver seems to detect and provide a valid flash map to the system
 123 +         of course, it needs checking and testing.
 124 +
 125  config MTD_DILNETPC
 126         tristate "CFI Flash device mapped on DIL/Net PC"
 127         depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT
 128 diff -urN linux-2.6.16.7/drivers/mtd/maps/Makefile linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Makefile
 129 --- linux-2.6.16.7/drivers/mtd/maps/Makefile    2006-04-17 23:53:25.000000000 +0200
 130 +++ linux-2.6.16.7-brcm63xx/drivers/mtd/maps/Makefile   2006-07-07 22:01:29.000000000 +0200
 131 @@ -71,3 +71,4 @@
 132  obj-$(CONFIG_MTD_OMAP_NOR)     += omap_nor.o
 133  obj-$(CONFIG_MTD_MTX1)         += mtx-1_flash.o
 134  obj-$(CONFIG_MTD_TQM834x)      += tqm834x.o
 135 +obj-$(CONFIG_MTD_BCM963XX)      += bcm963xx.o