target/linux/brcm63xx/patches-2.6.33/040-bcm963xx_flashmap.patch

   1 From e734ace5baa04e0e8af1d4483475fbd6bd2b32a1 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
   7 Signed-off-by: Axel Gembe <ago@bastart.eu.org>
   8 ---
   9  drivers/mtd/maps/Kconfig  |    7 +++++++
  10  drivers/mtd/maps/Makefile |    1 +
  11  drivers/mtd/redboot.c     |   13 ++++++++++---
  12  3 files changed, 18 insertions(+), 3 deletions(-)
  13
  14 --- a/drivers/mtd/maps/Kconfig
  15 +++ b/drivers/mtd/maps/Kconfig
  16 @@ -257,6 +257,13 @@ config MTD_ALCHEMY
  17         help
  18           Flash memory access on AMD Alchemy Pb/Db/RDK Reference Boards
  19
  20 +config MTD_BCM963XX
  21 +        tristate "BCM963xx Flash device"
  22 +        depends on MIPS && BCM63XX
  23 +        help
  24 +         Flash memory access on BCM963xx boards. Currently only works with
  25 +         RedBoot and CFE.
  26 +
  27  config MTD_DILNETPC
  28         tristate "CFI Flash device mapped on DIL/Net PC"
  29         depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
  30 --- a/drivers/mtd/redboot.c
  31 +++ b/drivers/mtd/redboot.c
  32 @@ -39,7 +39,7 @@ static inline int redboot_checksum(struc
  33         return 1;
  34  }
  35
  36 -static int parse_redboot_partitions(struct mtd_info *master,
  37 +int parse_redboot_partitions(struct mtd_info *master,
  38                               struct mtd_partition **pparts,
  39                               unsigned long fis_origin)
  40  {
  41 @@ -162,6 +162,14 @@ static int parse_redboot_partitions(stru
  42                 goto out;
  43         }
  44
  45 +       if (!fis_origin) {
  46 +               for (i = 0; i < numslots; i++) {
  47 +                       if (!strncmp(buf[i].name, "RedBoot", 8)) {
  48 +                               fis_origin = (buf[i].flash_base & (master->size << 1) - 1);
  49 +                       }
  50 +               }
  51 +       }
  52 +
  53         for (i = 0; i < numslots; i++) {
  54                 struct fis_list *new_fl, **prev;
  55
  56 @@ -184,9 +192,8 @@ static int parse_redboot_partitions(stru
  57                 new_fl->img = &buf[i];
  58                  if (fis_origin) {
  59                          buf[i].flash_base -= fis_origin;
  60 -                } else {
  61 -                        buf[i].flash_base &= master->size-1;
  62                  }
  63 +               buf[i].flash_base &= (master->size << 1) - 1;
  64
  65                 /* I'm sure the JFFS2 code has done me permanent damage.
  66                  * I now think the following is _normal_
  67 --- a/drivers/mtd/maps/Makefile
  68 +++ b/drivers/mtd/maps/Makefile
  69 @@ -61,3 +61,4 @@ obj-$(CONFIG_MTD_BFIN_ASYNC)  += bfin-asy
  70  obj-$(CONFIG_MTD_RBTX4939)     += rbtx4939-flash.o
  71  obj-$(CONFIG_MTD_VMU)          += vmu-flash.o
  72  obj-$(CONFIG_MTD_GPIO_ADDR)    += gpio-addr-flash.o
  73 +obj-$(CONFIG_MTD_BCM963XX)     += bcm963xx-flash.o
  74 --- /dev/null
  75 +++ b/drivers/mtd/maps/bcm963xx-flash.c
  76 @@ -0,0 +1,266 @@
  77 +/*
  78 + * Copyright (C) 2006-2008  Florian Fainelli <florian@openwrt.org>
  79 + *                         Mike Albon <malbon@openwrt.org>
  80 + *
  81 + * This program is free software; you can redistribute it and/or modify
  82 + * it under the terms of the GNU General Public License as published by
  83 + * the Free Software Foundation; either version 2 of the License, or
  84 + * (at your option) any later version.
  85 + *
  86 + * This program is distributed in the hope that it will be useful,
  87 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  88 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  89 + * GNU General Public License for more details.
  90 + *
  91 + * You should have received a copy of the GNU General Public License
  92 + * along with this program; if not, write to the Free Software
  93 + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  94 + */
  95 +
  96 +#include <linux/init.h>
  97 +#include <linux/kernel.h>
  98 +#include <linux/mtd/map.h>
  99 +#include <linux/mtd/mtd.h>
 100 +#include <linux/mtd/partitions.h>
 101 +#include <linux/vmalloc.h>
 102 +#include <linux/platform_device.h>
 103 +
 104 +#include <bcm_tag.h>
 105 +#include <asm/io.h>
 106 +
 107 +#define BUSWIDTH 2                     /* Buswidth */
 108 +#define EXTENDED_SIZE 0xBFC00000       /* Extended flash address */
 109 +
 110 +#define PFX KBUILD_MODNAME ": "
 111 +
 112 +extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
 113 +static struct mtd_partition *parsed_parts;
 114 +
 115 +static struct mtd_info *bcm963xx_mtd_info;
 116 +
 117 +static struct map_info bcm963xx_map = {
 118 +       .name           = "bcm963xx",
 119 +       .bankwidth      = BUSWIDTH,
 120 +};
 121 +
 122 +
 123 +static int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
 124 +{
 125 +       int nrparts = 3, curpart = 0; /* CFE,NVRAM and global LINUX are always present. */
 126 +       struct bcm_tag *buf;
 127 +       struct mtd_partition *parts;
 128 +       int ret;
 129 +       size_t retlen;
 130 +       unsigned int rootfsaddr, kerneladdr, spareaddr;
 131 +       unsigned int rootfslen, kernellen, sparelen, totallen;
 132 +       int namelen = 0;
 133 +       int i;
 134 +       char *boardid;
 135 +        char *tagversion;
 136 +
 137 +       /* Allocate memory for buffer */
 138 +       buf = vmalloc(sizeof(struct bcm_tag));
 139 +       if (!buf)
 140 +               return -ENOMEM;
 141 +
 142 +       /* Get the tag */
 143 +       ret = master->read(master,0x10000,sizeof(struct bcm_tag), &retlen, (void *)buf);
 144 +       if (retlen != sizeof(struct bcm_tag)){
 145 +               vfree(buf);
 146 +               return -EIO;
 147 +       }
 148 +
 149 +       sscanf(buf->kernelAddress, "%u", &kerneladdr);
 150 +       sscanf(buf->kernelLength, "%u", &kernellen);
 151 +       sscanf(buf->totalLength, "%u", &totallen);
 152 +       tagversion = &(buf->tagVersion[0]);
 153 +       boardid = &(buf->boardid[0]);
 154 +
 155 +       printk(KERN_INFO PFX "CFE boot tag found with version %s and board type %s\n",tagversion, boardid);
 156 +
 157 +       kerneladdr = kerneladdr - EXTENDED_SIZE;
 158 +       rootfsaddr = kerneladdr + kernellen;
 159 +       spareaddr = roundup(totallen, master->erasesize) + master->erasesize;
 160 +       sparelen = master->size - spareaddr - master->erasesize;
 161 +       rootfslen = spareaddr - rootfsaddr;
 162 +
 163 +       /* Determine number of partitions */
 164 +       namelen = 8;
 165 +       if (rootfslen > 0){
 166 +               nrparts++;
 167 +               namelen =+ 6;
 168 +       };
 169 +       if (kernellen > 0) {
 170 +               nrparts++;
 171 +               namelen =+ 6;
 172 +       };
 173 +
 174 +       /* Ask kernel for more memory */
 175 +       parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
 176 +       if (!parts) {
 177 +               vfree(buf);
 178 +               return -ENOMEM;
 179 +       };
 180 +
 181 +       /* Start building partition list */
 182 +       parts[curpart].name = "CFE";
 183 +       parts[curpart].offset = 0;
 184 +       parts[curpart].size = master->erasesize;
 185 +       curpart++;
 186 +
 187 +       if (kernellen > 0) {
 188 +               parts[curpart].name = "kernel";
 189 +               parts[curpart].offset = kerneladdr;
 190 +               parts[curpart].size = kernellen;
 191 +               curpart++;
 192 +       };
 193 +
 194 +       if (rootfslen > 0) {
 195 +               parts[curpart].name = "rootfs";
 196 +               parts[curpart].offset = rootfsaddr;
 197 +               parts[curpart].size = rootfslen;
 198 +               if (sparelen > 0)
 199 +                       parts[curpart].size += sparelen;
 200 +               curpart++;
 201 +       };
 202 +
 203 +       parts[curpart].name = "nvram";
 204 +       parts[curpart].offset = master->size - master->erasesize;
 205 +       parts[curpart].size = master->erasesize;
 206 +
 207 +       /* Global partition "linux" to make easy firmware upgrade */
 208 +       curpart++;
 209 +       parts[curpart].name = "linux";
 210 +       parts[curpart].offset = parts[0].size;
 211 +       parts[curpart].size = master->size - parts[0].size - parts[3].size;
 212 +
 213 +       for (i = 0; i < nrparts; i++)
 214 +               printk(KERN_INFO PFX "Partition %d is %s offset %lx and length %lx\n", i, parts[i].name, (long unsigned int)(parts[i].offset), (long unsigned int)(parts[i].size));
 215 +
 216 +       printk(KERN_INFO PFX "Spare partition is %x offset and length %x\n", spareaddr, sparelen);
 217 +       *pparts = parts;
 218 +       vfree(buf);
 219 +
 220 +       return nrparts;
 221 +};
 222 +
 223 +static int bcm963xx_detect_cfe(struct mtd_info *master)
 224 +{
 225 +       int idoffset = 0x4e0;
 226 +       static char idstring[8] = "CFE1CFE1";
 227 +       char buf[9];
 228 +       int ret;
 229 +       size_t retlen;
 230 +
 231 +       ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
 232 +       buf[retlen] = 0;
 233 +       printk(KERN_INFO PFX "Read Signature value of %s\n", buf);
 234 +
 235 +       return strncmp(idstring, buf, 8);
 236 +}
 237 +
 238 +static int bcm963xx_probe(struct platform_device *pdev)
 239 +{
 240 +       int err = 0;
 241 +       int parsed_nr_parts = 0;
 242 +       char *part_type;
 243 +       struct resource *r;
 244 +
 245 +       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 246 +       bcm963xx_map.phys = r->start;
 247 +       bcm963xx_map.size = (r->end - r->start) + 1;
 248 +       bcm963xx_map.virt = ioremap(r->start, r->end - r->start + 1);
 249 +
 250 +       if (!bcm963xx_map.virt) {
 251 +               printk(KERN_ERR PFX "Failed to ioremap\n");
 252 +               return -EIO;
 253 +       }
 254 +       printk(KERN_INFO PFX "0x%08lx at 0x%08x\n", bcm963xx_map.size, bcm963xx_map.phys);
 255 +
 256 +       simple_map_init(&bcm963xx_map);
 257 +
 258 +       bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
 259 +       if (!bcm963xx_mtd_info) {
 260 +               printk(KERN_ERR PFX "Failed to probe using CFI\n");
 261 +               err = -EIO;
 262 +               goto err_probe;
 263 +       }
 264 +
 265 +       bcm963xx_mtd_info->owner = THIS_MODULE;
 266 +
 267 +       /* This is mutually exclusive */
 268 +       if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0) {
 269 +               printk(KERN_INFO PFX "CFE bootloader detected\n");
 270 +               if (parsed_nr_parts == 0) {
 271 +                       int ret = parse_cfe_partitions(bcm963xx_mtd_info, &parsed_parts);
 272 +                       if (ret > 0) {
 273 +                               part_type = "CFE";
 274 +                               parsed_nr_parts = ret;
 275 +                       }
 276 +               }
 277 +       } else {
 278 +               printk(KERN_INFO PFX "assuming RedBoot bootloader\n");
 279 +               if (bcm963xx_mtd_info->size > 0x00400000) {
 280 +                       printk(KERN_INFO PFX "Support for extended flash memory size : 0x%lx ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd_info->size);
 281 +                       bcm963xx_map.virt = (u32)(EXTENDED_SIZE);
 282 +               }
 283 +
 284 +#ifdef CONFIG_MTD_REDBOOT_PARTS
 285 +               if (parsed_nr_parts == 0) {
 286 +                       int ret = parse_redboot_partitions(bcm963xx_mtd_info, &parsed_parts, 0);
 287 +                       if (ret > 0) {
 288 +                               part_type = "RedBoot";
 289 +                               parsed_nr_parts = ret;
 290 +                       }
 291 +               }
 292 +#endif
 293 +       }
 294 +
 295 +       return add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
 296 +
 297 +err_probe:
 298 +       iounmap(bcm963xx_map.virt);
 299 +       return err;
 300 +}
 301 +
 302 +static int bcm963xx_remove(struct platform_device *pdev)
 303 +{
 304 +       if (bcm963xx_mtd_info) {
 305 +               del_mtd_partitions(bcm963xx_mtd_info);
 306 +               map_destroy(bcm963xx_mtd_info);
 307 +       }
 308 +
 309 +       if (bcm963xx_map.virt) {
 310 +               iounmap(bcm963xx_map.virt);
 311 +               bcm963xx_map.virt = 0;
 312 +       }
 313 +
 314 +       return 0;
 315 +}
 316 +
 317 +static struct platform_driver bcm63xx_mtd_dev = {
 318 +       .probe  = bcm963xx_probe,
 319 +       .remove = bcm963xx_remove,
 320 +       .driver = {
 321 +               .name   = "bcm963xx-flash",
 322 +               .owner  = THIS_MODULE,
 323 +       },
 324 +};
 325 +
 326 +static int __init bcm963xx_mtd_init(void)
 327 +{
 328 +       return platform_driver_register(&bcm63xx_mtd_dev);
 329 +}
 330 +
 331 +static void __exit bcm963xx_mtd_exit(void)
 332 +{
 333 +       platform_driver_unregister(&bcm63xx_mtd_dev);
 334 +}
 335 +
 336 +module_init(bcm963xx_mtd_init);
 337 +module_exit(bcm963xx_mtd_exit);
 338 +
 339 +MODULE_LICENSE("GPL");
 340 +MODULE_DESCRIPTION("Broadcom BCM63xx MTD partition parser/mapping for CFE and RedBoot");
 341 +MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
 342 +MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
 343 --- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
 344 +++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
 345 @@ -721,20 +721,6 @@ static int board_get_mac_address(u8 *mac
 346         return 0;
 347  }
 348
 349 -static struct mtd_partition mtd_partitions[] = {
 350 -       {
 351 -               .name           = "cfe",
 352 -               .offset         = 0x0,
 353 -               .size           = 0x40000,
 354 -       }
 355 -};
 356 -
 357 -static struct physmap_flash_data flash_data = {
 358 -       .width                  = 2,
 359 -       .nr_parts               = ARRAY_SIZE(mtd_partitions),
 360 -       .parts                  = mtd_partitions,
 361 -};
 362 -
 363  static struct resource mtd_resources[] = {
 364         {
 365                 .start          = 0,    /* filled at runtime */
 366 @@ -744,12 +730,9 @@ static struct resource mtd_resources[] =
 367  };
 368
 369  static struct platform_device mtd_dev = {
 370 -       .name                   = "physmap-flash",
 371 +       .name                   = "bcm963xx-flash",
 372         .resource               = mtd_resources,
 373         .num_resources          = ARRAY_SIZE(mtd_resources),
 374 -       .dev                    = {
 375 -               .platform_data  = &flash_data,
 376 -       },
 377  };
 378
 379  /*