target/linux/linux-2.4/patches/brcm/004-flash-map.patch

   1 diff -Nur linux-2.4.32/drivers/mtd/maps/bcm947xx-flash.c linux-2.4.32-flash/drivers/mtd/maps/bcm947xx-flash.c
   2 --- linux-2.4.32/drivers/mtd/maps/bcm947xx-flash.c      1970-01-01 01:00:00.000000000 +0100
   3 +++ linux-2.4.32-flash/drivers/mtd/maps/bcm947xx-flash.c        2005-12-19 01:29:52.464670750 +0100
   4 @@ -0,0 +1,366 @@
   5 +/*
   6 + *  Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
   7 + *  Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
   8 + *
   9 + *  original functions for finding root filesystem from Mike Baker
  10 + *
  11 + *  This program is free software; you can redistribute  it and/or modify it
  12 + *  under  the terms of  the GNU General  Public License as published by the
  13 + *  Free Software Foundation;  either version 2 of the  License, or (at your
  14 + *  option) any later version.
  15 + *
  16 + *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  17 + *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  18 + *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  19 + *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  20 + *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21 + *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  22 + *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  23 + *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  24 + *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25 + *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 + *
  27 + *  You should have received a copy of the  GNU General Public License along
  28 + *  with this program; if not, write  to the Free Software Foundation, Inc.,
  29 + *  675 Mass Ave, Cambridge, MA 02139, USA.
  30 + *
  31 + *
  32 + * Copyright 2004, Broadcom Corporation
  33 + * All Rights Reserved.
  34 + *
  35 + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
  36 + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
  37 + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  38 + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  39 + *
  40 + * Flash mapping for BCM947XX boards
  41 + *
  42 + */
  43 +
  44 +#include <linux/module.h>
  45 +#include <linux/types.h>
  46 +#include <linux/kernel.h>
  47 +#include <asm/io.h>
  48 +#include <linux/mtd/mtd.h>
  49 +#include <linux/mtd/map.h>
  50 +#ifdef CONFIG_MTD_PARTITIONS
  51 +#include <linux/mtd/partitions.h>
  52 +#endif
  53 +#include <linux/config.h>
  54 +
  55 +#include <trxhdr.h>
  56 +
  57 +#define WINDOW_ADDR 0x1c000000
  58 +#define WINDOW_SIZE (0x400000*2)
  59 +#define BUSWIDTH 2
  60 +
  61 +static struct mtd_info *bcm947xx_mtd;
  62 +
  63 +__u8 bcm947xx_map_read8(struct map_info *map, unsigned long ofs)
  64 +{
  65 +       if (map->map_priv_2 == 1)
  66 +               return __raw_readb(map->map_priv_1 + ofs);
  67 +
  68 +       u16 val = __raw_readw(map->map_priv_1 + (ofs & ~1));
  69 +       if (ofs & 1)
  70 +               return ((val >> 8) & 0xff);
  71 +       else
  72 +               return (val & 0xff);
  73 +}
  74 +
  75 +__u16 bcm947xx_map_read16(struct map_info *map, unsigned long ofs)
  76 +{
  77 +       return __raw_readw(map->map_priv_1 + ofs);
  78 +}
  79 +
  80 +__u32 bcm947xx_map_read32(struct map_info *map, unsigned long ofs)
  81 +{
  82 +       return __raw_readl(map->map_priv_1 + ofs);
  83 +}
  84 +
  85 +void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
  86 +{
  87 +       if (len==1) {
  88 +               memcpy_fromio(to, map->map_priv_1 + from, len);
  89 +       } else {
  90 +               int i;
  91 +               u16 *dest = (u16 *) to;
  92 +               u16 *src  = (u16 *) (map->map_priv_1 + from);
  93 +               for (i = 0; i < (len / 2); i++) {
  94 +                       dest[i] = src[i];
  95 +               }
  96 +               if (len & 1)
  97 +                       *((u8 *)dest+len-1) = src[i] & 0xff;
  98 +       }
  99 +}
 100 +
 101 +void bcm947xx_map_write8(struct map_info *map, __u8 d, unsigned long adr)
 102 +{
 103 +       __raw_writeb(d, map->map_priv_1 + adr);
 104 +       mb();
 105 +}
 106 +
 107 +void bcm947xx_map_write16(struct map_info *map, __u16 d, unsigned long adr)
 108 +{
 109 +       __raw_writew(d, map->map_priv_1 + adr);
 110 +       mb();
 111 +}
 112 +
 113 +void bcm947xx_map_write32(struct map_info *map, __u32 d, unsigned long adr)
 114 +{
 115 +       __raw_writel(d, map->map_priv_1 + adr);
 116 +       mb();
 117 +}
 118 +
 119 +void bcm947xx_map_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
 120 +{
 121 +       memcpy_toio(map->map_priv_1 + to, from, len);
 122 +}
 123 +
 124 +struct map_info bcm947xx_map = {
 125 +       name: "Physically mapped flash",
 126 +       size: WINDOW_SIZE,
 127 +       buswidth: BUSWIDTH,
 128 +       read8: bcm947xx_map_read8,
 129 +       read16: bcm947xx_map_read16,
 130 +       read32: bcm947xx_map_read32,
 131 +       copy_from: bcm947xx_map_copy_from,
 132 +       write8: bcm947xx_map_write8,
 133 +       write16: bcm947xx_map_write16,
 134 +       write32: bcm947xx_map_write32,
 135 +       copy_to: bcm947xx_map_copy_to
 136 +};
 137 +
 138 +#ifdef CONFIG_MTD_PARTITIONS
 139 +
 140 +static struct mtd_partition bcm947xx_parts[] = {
 141 +       { name: "cfe",  offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
 142 +       { name: "linux", offset: 0, size: 0, },
 143 +       { name: "rootfs", offset: 0, size: 0, },
 144 +       { name: "nvram", offset: 0, size: 0, },
 145 +       { name: "OpenWrt", offset: 0, size: 0, },
 146 +       { name: NULL, },
 147 +};
 148 +
 149 +static int __init
 150 +find_cfe_size(struct mtd_info *mtd, size_t size)
 151 +{
 152 +       struct trx_header *trx;
 153 +       unsigned char buf[512];
 154 +       int off;
 155 +       size_t len;
 156 +       int cfe_size_flag;
 157 +
 158 +       trx = (struct trx_header *) buf;
 159 +
 160 +       cfe_size_flag=0;
 161 +
 162 +       for (off = (256*1024); off < size; off += mtd->erasesize) {
 163 +               memset(buf, 0xe5, sizeof(buf));
 164 +
 165 +               /*
 166 +                * Read into buffer
 167 +                */
 168 +               if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
 169 +                   len != sizeof(buf))
 170 +                       continue;
 171 +
 172 +               /* found a TRX header */
 173 +               if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
 174 +                       goto done;
 175 +               }
 176 +               cfe_size_flag += 1;
 177 +       }
 178 +
 179 +       printk(KERN_NOTICE
 180 +              "%s: Couldn't find bootloader size\n",
 181 +              mtd->name);
 182 +       return -1;
 183 +
 184 + done:
 185 +       printk(KERN_NOTICE "bootloader size flag: %d\n", cfe_size_flag);
 186 +       return cfe_size_flag;
 187 +
 188 +}
 189 +
 190 +static int __init
 191 +find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
 192 +{
 193 +       struct trx_header *trx;
 194 +       unsigned char buf[512];
 195 +       int off;
 196 +       size_t len;
 197 +
 198 +       trx = (struct trx_header *) buf;
 199 +
 200 +       for (off = (256*1024); off < size; off += mtd->erasesize) {
 201 +               memset(buf, 0xe5, sizeof(buf));
 202 +
 203 +               /*
 204 +                * Read into buffer
 205 +                */
 206 +               if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
 207 +                   len != sizeof(buf))
 208 +                       continue;
 209 +
 210 +               /* found a TRX header */
 211 +               if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
 212 +                       part->offset = le32_to_cpu(trx->offsets[2]) ? :
 213 +                               le32_to_cpu(trx->offsets[1]);
 214 +                       part->size = le32_to_cpu(trx->len);
 215 +
 216 +                       part->size -= part->offset;
 217 +                       part->offset += off;
 218 +
 219 +                       goto done;
 220 +               }
 221 +       }
 222 +
 223 +       printk(KERN_NOTICE
 224 +              "%s: Couldn't find root filesystem\n",
 225 +              mtd->name);
 226 +       return -1;
 227 +
 228 + done:
 229 +       return part->size;
 230 +}
 231 +
 232 +struct mtd_partition * __init
 233 +init_mtd_partitions(struct mtd_info *mtd, size_t size)
 234 +{
 235 +
 236 +       int cfe_size_flag;
 237 +
 238 +       /* if cfe_size_flag=0, cfe size is 256 kb, else 384 kb */
 239 +       cfe_size_flag = find_cfe_size(mtd,size);
 240 +
 241 +       /* boot loader */
 242 +       bcm947xx_parts[0].offset = 0;
 243 +       if (cfe_size_flag == 0) {
 244 +               bcm947xx_parts[0].size   = 1024*256;
 245 +       } else {
 246 +               /* netgear wgt634u has 384 kb bootloader */
 247 +               bcm947xx_parts[0].size   = 1024*384;
 248 +       }
 249 +
 250 +       /* nvram */
 251 +       if (cfe_size_flag == 0) {
 252 +               bcm947xx_parts[3].offset = size - mtd->erasesize;
 253 +       } else {
 254 +               /* nvram (old 128kb config partition on netgear wgt634u) */
 255 +               bcm947xx_parts[3].offset = bcm947xx_parts[0].size;
 256 +       }
 257 +       bcm947xx_parts[3].size = mtd->erasesize;
 258 +
 259 +       /* linux (kernel and rootfs) */
 260 +       if (cfe_size_flag == 0) {
 261 +               bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
 262 +               bcm947xx_parts[1].size   = bcm947xx_parts[3].offset -
 263 +                       bcm947xx_parts[1].offset;
 264 +       } else {
 265 +               /* do not count the elf loader, which is on one block */
 266 +               bcm947xx_parts[1].offset = bcm947xx_parts[0].size +
 267 +                       bcm947xx_parts[3].size + mtd->erasesize;
 268 +               bcm947xx_parts[1].size   = size -
 269 +                       bcm947xx_parts[0].size -
 270 +                       (2*bcm947xx_parts[3].size) -
 271 +                       mtd->erasesize;
 272 +       }
 273 +
 274 +       /* find and size rootfs */
 275 +       if (find_root(mtd,size,&bcm947xx_parts[2])==0) {
 276 +               /* entirely jffs2 */
 277 +               bcm947xx_parts[4].name = NULL;
 278 +               bcm947xx_parts[2].size = size - bcm947xx_parts[2].offset -
 279 +                               bcm947xx_parts[3].size;
 280 +       } else {
 281 +               /* legacy setup */
 282 +               /* calculate leftover flash, and assign it to the jffs2 partition */
 283 +               if (cfe_size_flag == 0) {
 284 +                       bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
 285 +                               bcm947xx_parts[2].size;
 286 +                       if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
 287 +                               bcm947xx_parts[4].offset += mtd->erasesize -
 288 +                                       (bcm947xx_parts[4].offset % mtd->erasesize);
 289 +                       }
 290 +                       bcm947xx_parts[4].size = bcm947xx_parts[3].offset -
 291 +                               bcm947xx_parts[4].offset;
 292 +               } else {
 293 +                       bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
 294 +                               bcm947xx_parts[2].size;
 295 +                       if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
 296 +                               bcm947xx_parts[4].offset += mtd->erasesize -
 297 +                                       (bcm947xx_parts[4].offset % mtd->erasesize);
 298 +                       }
 299 +                       bcm947xx_parts[4].size = size - bcm947xx_parts[3].size -
 300 +                               bcm947xx_parts[4].offset;
 301 +               }
 302 +       }
 303 +
 304 +       return bcm947xx_parts;
 305 +}
 306 +
 307 +#endif
 308 +
 309 +
 310 +mod_init_t init_bcm947xx_map(void)
 311 +{
 312 +       size_t size;
 313 +       int ret = 0;
 314 +#ifdef CONFIG_MTD_PARTITIONS
 315 +       struct mtd_partition *parts;
 316 +       int i;
 317 +#endif
 318 +
 319 +       bcm947xx_map.map_priv_1 = (unsigned long) ioremap(WINDOW_ADDR, WINDOW_SIZE);
 320 +
 321 +       if (!bcm947xx_map.map_priv_1) {
 322 +               printk(KERN_ERR "Failed to ioremap\n");
 323 +               return -EIO;
 324 +       }
 325 +
 326 +       if (!(bcm947xx_mtd = do_map_probe("cfi_probe", &bcm947xx_map))) {
 327 +               printk(KERN_ERR "pflash: cfi_probe failed\n");
 328 +               iounmap((void *)bcm947xx_map.map_priv_1);
 329 +               return -ENXIO;
 330 +       }
 331 +
 332 +       bcm947xx_mtd->module = THIS_MODULE;
 333 +
 334 +       size = bcm947xx_mtd->size;
 335 +
 336 +       printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
 337 +
 338 +#ifdef CONFIG_MTD_PARTITIONS
 339 +       parts = init_mtd_partitions(bcm947xx_mtd, size);
 340 +       for (i = 0; parts[i].name; i++);
 341 +       ret = add_mtd_partitions(bcm947xx_mtd, parts, i);
 342 +       if (ret) {
 343 +               printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
 344 +               goto fail;
 345 +       }
 346 +#endif
 347 +
 348 +       return 0;
 349 +
 350 + fail:
 351 +       if (bcm947xx_mtd)
 352 +               map_destroy(bcm947xx_mtd);
 353 +       if (bcm947xx_map.map_priv_1)
 354 +               iounmap((void *) bcm947xx_map.map_priv_1);
 355 +       bcm947xx_map.map_priv_1 = 0;
 356 +       return ret;
 357 +}
 358 +
 359 +mod_exit_t cleanup_bcm947xx_map(void)
 360 +{
 361 +#ifdef CONFIG_MTD_PARTITIONS
 362 +       del_mtd_partitions(bcm947xx_mtd);
 363 +#endif
 364 +       map_destroy(bcm947xx_mtd);
 365 +       iounmap((void *) bcm947xx_map.map_priv_1);
 366 +       bcm947xx_map.map_priv_1 = 0;
 367 +}
 368 +
 369 +module_init(init_bcm947xx_map);
 370 +module_exit(cleanup_bcm947xx_map);
 371 diff -Nur linux-2.4.32/drivers/mtd/maps/Config.in linux-2.4.32-flash/drivers/mtd/maps/Config.in
 372 --- linux-2.4.32/drivers/mtd/maps/Config.in     2003-06-13 16:51:34.000000000 +0200
 373 +++ linux-2.4.32-flash/drivers/mtd/maps/Config.in       2005-12-18 15:53:52.003277250 +0100
 374 @@ -48,6 +48,7 @@
 375  fi
 376
 377  if [ "$CONFIG_MIPS" = "y" ]; then
 378 +   dep_tristate '  CFI Flash device mapped on Broadcom BCM947XX boards' CONFIG_MTD_BCM947XX $CONFIG_MTD_CFI
 379     dep_tristate '  Pb1000 MTD support' CONFIG_MTD_PB1000 $CONFIG_MIPS_PB1000
 380     dep_tristate '  Pb1500 MTD support' CONFIG_MTD_PB1500 $CONFIG_MIPS_PB1500
 381     dep_tristate '  Pb1100 MTD support' CONFIG_MTD_PB1100 $CONFIG_MIPS_PB1100
 382 diff -Nur linux-2.4.32/drivers/mtd/maps/Makefile linux-2.4.32-flash/drivers/mtd/maps/Makefile
 383 --- linux-2.4.32/drivers/mtd/maps/Makefile      2003-06-13 16:51:34.000000000 +0200
 384 +++ linux-2.4.32-flash/drivers/mtd/maps/Makefile        2005-12-18 15:54:39.022215750 +0100
 385 @@ -3,6 +3,8 @@
 386  #
 387  # $Id: Makefile,v 1.37 2003/01/24 14:26:38 dwmw2 Exp $
 388
 389 +EXTRA_CFLAGS := -I$(TOPDIR)/arch/mips/bcm947xx/include
 390 +
 391  BELOW25                := $(shell echo $(PATCHLEVEL) | sed s/[1234]/y/)
 392
 393  ifeq ($(BELOW25),y)
 394 @@ -10,6 +12,7 @@
 395  endif
 396
 397  # Chip mappings
 398 +obj-$(CONFIG_MTD_BCM947XX)     += bcm947xx-flash.o
 399  obj-$(CONFIG_MTD_CDB89712)     += cdb89712.o
 400  obj-$(CONFIG_MTD_ARM_INTEGRATOR)+= integrator-flash.o
 401  obj-$(CONFIG_MTD_CFI_FLAGADM)  += cfi_flagadm.o