target/linux/linux-2.4/patches/ar7/001-flash_map.patch

   1 diff -urN linux-2.4.30/drivers/mtd/maps/Config.in linux-2.4.30.dev/drivers/mtd/maps/Config.in
   2 --- linux-2.4.30/drivers/mtd/maps/Config.in     2005-06-14 19:31:49.000000000 +0200
   3 +++ linux-2.4.30.dev/drivers/mtd/maps/Config.in 2005-06-14 15:36:59.000000000 +0200
   4 @@ -48,6 +48,21 @@
   5  fi
   6
   7  if [ "$CONFIG_MIPS" = "y" ]; then
   8 +    if [ "$CONFIG_AR7" = "y" ]; then
   9 +      dep_tristate '  Flash chip mapping on Texas Instruments AR7' CONFIG_MTD_AVALANCHE $CONFIG_MTD_CFI $CONFIG_MTD_PARTITIONS
  10 +      dep_bool     '    Use defaults for Texas Instruments AR7' CONFIG_MTD_AVALANCHE_DEFAULTS $CONFIG_MTD_AVALANCHE
  11 +      if [ "$CONFIG_MTD_AVALANCHE" = "y" -o "$CONFIG_MTD_AVALANCHE" = "m" ]; then
  12 +         if [ "$CONFIG_MTD_AVALANCHE_DEFAULTS" = "y" ]; then
  13 +            define_hex CONFIG_MTD_AVALANCHE_START 0x10000000
  14 +            define_hex CONFIG_MTD_AVALANCHE_LEN 0x400000
  15 +            define_int CONFIG_MTD_AVALANCHE_BUSWIDTH 2
  16 +         else
  17 +            hex '      Physical start address of flash mapping' CONFIG_MTD_AVALANCHE_START 0x10000000
  18 +            hex '      Physical length of flash mapping' CONFIG_MTD_AVALANCHE_LEN 0x400000
  19 +            int '      Bus width in octets' CONFIG_MTD_AVALANCHE_BUSWIDTH 2
  20 +         fi
  21 +      fi
  22 +   fi
  23     dep_tristate '  Pb1000 MTD support' CONFIG_MTD_PB1000 $CONFIG_MIPS_PB1000
  24     dep_tristate '  Pb1500 MTD support' CONFIG_MTD_PB1500 $CONFIG_MIPS_PB1500
  25     dep_tristate '  Pb1100 MTD support' CONFIG_MTD_PB1100 $CONFIG_MIPS_PB1100
  26 diff -urN linux-2.4.30/drivers/mtd/maps/Makefile linux-2.4.30.dev/drivers/mtd/maps/Makefile
  27 --- linux-2.4.30/drivers/mtd/maps/Makefile      2005-06-14 19:31:49.000000000 +0200
  28 +++ linux-2.4.30.dev/drivers/mtd/maps/Makefile  2005-06-14 15:36:59.000000000 +0200
  29 @@ -10,6 +10,7 @@
  30  endif
  31
  32  # Chip mappings
  33 +obj-$(CONFIG_MTD_AVALANCHE)    += ar7-flash.o
  34  obj-$(CONFIG_MTD_CDB89712)     += cdb89712.o
  35  obj-$(CONFIG_MTD_ARM_INTEGRATOR)+= integrator-flash.o
  36  obj-$(CONFIG_MTD_CFI_FLAGADM)  += cfi_flagadm.o
  37 diff -urN linux-2.4.30/drivers/mtd/maps/ar7-flash.c linux-2.4.30.dev/drivers/mtd/maps/ar7-flash.c
  38 --- linux-2.4.30/drivers/mtd/maps/ar7-flash.c   1970-01-01 01:00:00.000000000 +0100
  39 +++ linux-2.4.30.dev/drivers/mtd/maps/ar7-flash.c       2005-06-14 22:42:23.000000000 +0200
  40 @@ -0,0 +1,245 @@
  41 +/*
  42 + * $Id$
  43 + *
  44 + * Normal mappings of chips in physical memory
  45 + */
  46 +
  47 +#include <linux/module.h>
  48 +#include <linux/types.h>
  49 +#include <linux/kernel.h>
  50 +#include <asm/io.h>
  51 +#include <linux/mtd/mtd.h>
  52 +#include <linux/mtd/map.h>
  53 +#include <linux/config.h>
  54 +#include <linux/mtd/partitions.h>
  55 +#include "trxhdr.h"
  56 +
  57 +#define WINDOW_ADDR CONFIG_MTD_AVALANCHE_START
  58 +#define WINDOW_SIZE CONFIG_MTD_AVALANCHE_LEN
  59 +#define BUSWIDTH CONFIG_MTD_AVALANCHE_BUSWIDTH
  60 +
  61 +#include <asm/mips-boards/prom.h>
  62 +extern char *prom_getenv(char *name);
  63 +
  64 +static int create_mtd_partitions(void);
  65 +static void __exit avalanche_mtd_cleanup(void);
  66 +
  67 +/* avalanche__partition_info gives details on the logical partitions that splits
  68 + * the flash device into. If the size if zero we use up to the end of
  69 + * the device. */
  70 +#define MAX_NUM_PARTITIONS 5
  71 +static struct mtd_partition avalanche_partition_info[MAX_NUM_PARTITIONS];
  72 +static int num_of_partitions = 0;
  73 +
  74 +static struct mtd_info *avalanche_mtd_info;
  75 +
  76 +int avalanche_mtd_ready=0;
  77 +
  78 +__u8 avalanche_read8(struct map_info *map, unsigned long ofs)
  79 +{
  80 +       return __raw_readb(map->map_priv_1 + ofs);
  81 +}
  82 +
  83 +__u16 avalanche_read16(struct map_info *map, unsigned long ofs)
  84 +{
  85 +       return __raw_readw(map->map_priv_1 + ofs);
  86 +}
  87 +
  88 +__u32 avalanche_read32(struct map_info *map, unsigned long ofs)
  89 +{
  90 +       return __raw_readl(map->map_priv_1 + ofs);
  91 +}
  92 +
  93 +void avalanche_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
  94 +{
  95 +       memcpy_fromio(to, map->map_priv_1 + from, len);
  96 +}
  97 +
  98 +void avalanche_write8(struct map_info *map, __u8 d, unsigned long adr)
  99 +{
 100 +       __raw_writeb(d, map->map_priv_1 + adr);
 101 +       mb();
 102 +}
 103 +
 104 +void avalanche_write16(struct map_info *map, __u16 d, unsigned long adr)
 105 +{
 106 +       __raw_writew(d, map->map_priv_1 + adr);
 107 +       mb();
 108 +}
 109 +
 110 +void avalanche_write32(struct map_info *map, __u32 d, unsigned long adr)
 111 +{
 112 +       __raw_writel(d, map->map_priv_1 + adr);
 113 +       mb();
 114 +}
 115 +
 116 +void avalanche_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
 117 +{
 118 +       memcpy_toio(map->map_priv_1 + to, from, len);
 119 +}
 120 +
 121 +struct map_info avalanche_map = {
 122 +       name: "Physically mapped flash",
 123 +       size: WINDOW_SIZE,
 124 +       buswidth: BUSWIDTH,
 125 +       read8: avalanche_read8,
 126 +       read16: avalanche_read16,
 127 +       read32: avalanche_read32,
 128 +       copy_from: avalanche_copy_from,
 129 +       write8: avalanche_write8,
 130 +       write16: avalanche_write16,
 131 +       write32: avalanche_write32,
 132 +       copy_to: avalanche_copy_to
 133 +};
 134 +
 135 +int __init avalanche_mtd_init(void)
 136 +{
 137 +               printk(KERN_NOTICE "avalanche flash device: 0x%lx at 0x%lx.\n", (unsigned long)WINDOW_SIZE, (unsigned long)WINDOW_ADDR);
 138 +       avalanche_map.map_priv_1 = (unsigned long)ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
 139 +
 140 +       if (!avalanche_map.map_priv_1) {
 141 +               printk("Failed to ioremap\n");
 142 +               return -EIO;
 143 +       }
 144 +
 145 +       avalanche_mtd_info = do_map_probe("cfi_probe", &avalanche_map);
 146 +       if (!avalanche_mtd_info)
 147 +       {
 148 +               avalanche_mtd_cleanup();
 149 +               return -ENXIO;
 150 +       }
 151 +
 152 +       avalanche_mtd_info->module = THIS_MODULE;
 153 +
 154 +       if (!create_mtd_partitions())
 155 +               add_mtd_device(avalanche_mtd_info);
 156 +       else
 157 +               add_mtd_partitions(avalanche_mtd_info, avalanche_partition_info, num_of_partitions);
 158 +
 159 +       avalanche_mtd_ready=1;
 160 +
 161 +       return 0;
 162 +}
 163 +
 164 +static char *strdup(char *str)
 165 +{
 166 +       int n = strlen(str)+1;
 167 +       char *s = kmalloc(n, GFP_KERNEL);
 168 +       if (!s) return NULL;
 169 +       return strcpy(s, str);
 170 +}
 171 +
 172 +
 173 +static int create_mtd_partitions(void)
 174 +{
 175 +       unsigned int offset;
 176 +       unsigned int size;
 177 +       unsigned int found;
 178 +       unsigned char *flash_base;
 179 +       unsigned char *flash_end;
 180 +       struct trx_header hdr;
 181 +       char *env_ptr;
 182 +       char *base_ptr;
 183 +       char *end_ptr;
 184 +
 185 +       do {
 186 +               char    env_name[20];
 187 +
 188 +               found = 0;
 189 +
 190 +               /* get base and end addresses of flash file system from environment */
 191 +               sprintf(env_name, "mtd%1u", num_of_partitions);
 192 +               printk("Looking for mtd device :%s:\n", env_name);
 193 +
 194 +               env_ptr = prom_getenv(env_name);
 195 +               if(env_ptr == NULL) {
 196 +                       /* No more partitions to find */
 197 +                       break;
 198 +               }
 199 +
 200 +               /* Extract the start and stop addresses of the partition */
 201 +               base_ptr = strtok(env_ptr, ",");
 202 +               end_ptr = strtok(NULL, ",");
 203 +               if ((base_ptr == NULL) || (end_ptr == NULL)) {
 204 +                       printk("JFFS2 ERROR: Invalid %s start,end.\n", env_name);
 205 +                       break;
 206 +               }
 207 +
 208 +               flash_base = (unsigned char*) simple_strtol(base_ptr, NULL, 0);
 209 +               flash_end = (unsigned char*) simple_strtol(end_ptr, NULL, 0);
 210 +               if((!flash_base) || (!flash_end)) {
 211 +                       printk("JFFS2 ERROR: Invalid %s start,end.\n", env_name);
 212 +                       break;
 213 +               }
 214 +
 215 +               offset = virt_to_bus(flash_base) - WINDOW_ADDR;
 216 +               size = flash_end - flash_base;
 217 +               printk("Found a %s image (0x%x), with size (0x%x).\n",env_name, offset, size);
 218 +
 219 +               /* Setup the partition info. We duplicate the env_name for the partiton name */
 220 +               avalanche_partition_info[num_of_partitions].offset = offset;
 221 +               avalanche_partition_info[num_of_partitions].size = size;
 222 +               avalanche_partition_info[num_of_partitions].mask_flags = 0;
 223 +
 224 +               switch (num_of_partitions ) {
 225 +                       case 0:
 226 +                               avalanche_partition_info[num_of_partitions].name = strdup("rootfs");
 227 +                               avalanche_copy_from(&avalanche_map, &hdr, offset, sizeof(hdr));
 228 +                               if (hdr.magic == TRX_MAGIC) {
 229 +                                       printk("TRX partition detected. First offset: %08x\n", hdr.offsets[0]);
 230 +                                       avalanche_partition_info[num_of_partitions].offset += hdr.offsets[0];
 231 +                                       avalanche_partition_info[num_of_partitions].size -= hdr.offsets[0];
 232 +                               } else {
 233 +                                       printk("No TRX partition detected\n");
 234 +                               }
 235 +                               break;
 236 +
 237 +                       case 1:
 238 +                               avalanche_partition_info[num_of_partitions].name = strdup("linux");
 239 +                               break;
 240 +
 241 +                       case 2:
 242 +                               avalanche_partition_info[num_of_partitions].name = strdup("adam2");
 243 +                               break;
 244 +
 245 +                       case 3:
 246 +                               avalanche_partition_info[num_of_partitions].name = strdup("config");
 247 +                               break;
 248 +
 249 +                       case 4:
 250 +                               avalanche_partition_info[num_of_partitions].name = strdup("firmware");
 251 +                               break;
 252 +
 253 +                       default:
 254 +                               avalanche_partition_info[num_of_partitions].name = strdup(env_name);
 255 +                               break;
 256 +               }
 257 +
 258 +               num_of_partitions++;
 259 +       } while (num_of_partitions < MAX_NUM_PARTITIONS);
 260 +
 261 +       return num_of_partitions;
 262 +}
 263 +
 264 +static void __exit avalanche_mtd_cleanup(void)
 265 +{
 266 +       avalanche_mtd_ready=0;
 267 +
 268 +       if (avalanche_mtd_info) {
 269 +               del_mtd_partitions(avalanche_mtd_info);
 270 +               del_mtd_device(avalanche_mtd_info);
 271 +               map_destroy(avalanche_mtd_info);
 272 +       }
 273 +
 274 +       if (avalanche_map.map_priv_1) {
 275 +               iounmap((void *)avalanche_map.map_priv_1);
 276 +               avalanche_map.map_priv_1 = 0;
 277 +       }
 278 +}
 279 +
 280 +module_init(avalanche_mtd_init);
 281 +module_exit(avalanche_mtd_cleanup);
 282 +
 283 +MODULE_LICENSE("GPL");
 284 +MODULE_AUTHOR("Snehaprabha Narnakaje");
 285 +MODULE_DESCRIPTION("Avalanche CFI map driver");
 286 diff -urN linux-2.4.30/drivers/mtd/maps/trxhdr.h linux-2.4.30.dev/drivers/mtd/maps/trxhdr.h
 287 --- linux-2.4.30/drivers/mtd/maps/trxhdr.h      1970-01-01 01:00:00.000000000 +0100
 288 +++ linux-2.4.30.dev/drivers/mtd/maps/trxhdr.h  2005-06-14 21:57:04.000000000 +0200
 289 @@ -0,0 +1,29 @@
 290 +/*
 291 + * TRX image file header format.
 292 + *
 293 + * Copyright 2005, Broadcom Corporation
 294 + * All Rights Reserved.
 295 + *
 296 + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 297 + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 298 + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 299 + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 300 + *
 301 + * $Id$
 302 + */
 303 +
 304 +
 305 +#define TRX_MAGIC      0x30524448      /* "HDR0" */
 306 +#define TRX_VERSION    1
 307 +#define TRX_MAX_LEN    0x3A0000
 308 +#define TRX_NO_HEADER  1               /* Do not write TRX header */
 309 +#define TRX_GZ_FILES   0x2     /* Contains up to TRX_MAX_OFFSET individual gzip files */
 310 +#define TRX_MAX_OFFSET 3
 311 +
 312 +struct trx_header {
 313 +       __u32 magic;            /* "HDR0" */
 314 +       __u32 len;              /* Length of file including header */
 315 +       __u32 crc32;            /* 32-bit CRC from flag_version to end of file */
 316 +       __u32 flag_version;     /* 0:15 flags, 16:31 version */
 317 +       __u32 offsets[TRX_MAX_OFFSET];  /* Offsets of partitions from start of header */
 318 +};