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authorhauke <hauke@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-08-03 20:35:53 +0000
committerhauke <hauke@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-08-03 20:35:53 +0000
commitfa5411e7e4ae9c4c99a897069ac7757d8748d5df (patch)
treeda29a34d8c96d1f17c3083456ecb6c0f8473e510 /target/linux/brcm47xx/files-2.6.35/drivers/mtd/maps
parent9fa626205413672f096809af86d3e87ce788c1d4 (diff)
brcm47xx: ignore some parts of flash on some netgear devices. This
space is used to store config values. When overwriting it the device will not start any more. closes #7630 Thank you realopty for testing. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22475 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/brcm47xx/files-2.6.35/drivers/mtd/maps')
-rw-r--r--target/linux/brcm47xx/files-2.6.35/drivers/mtd/maps/bcm47xx-flash.c91
1 files changed, 88 insertions, 3 deletions
diff --git a/target/linux/brcm47xx/files-2.6.35/drivers/mtd/maps/bcm47xx-flash.c b/target/linux/brcm47xx/files-2.6.35/drivers/mtd/maps/bcm47xx-flash.c
index 61605d3f4..3159bf3f6 100644
--- a/target/linux/brcm47xx/files-2.6.35/drivers/mtd/maps/bcm47xx-flash.c
+++ b/target/linux/brcm47xx/files-2.6.35/drivers/mtd/maps/bcm47xx-flash.c
@@ -52,6 +52,8 @@
#include <linux/ssb/ssb.h>
#endif
#include <asm/io.h>
+#include <asm/mach-bcm47xx/nvram.h>
+#include <asm/fw/cfe/cfe_api.h>
#define TRX_MAGIC 0x30524448 /* "HDR0" */
@@ -75,6 +77,11 @@ struct trx_header {
#define WINDOW_SIZE 0x400000
#define BUSWIDTH 2
+#define ROUTER_NETGEAR_WGR614L 1
+#define ROUTER_NETGEAR_WNR834B 2
+#define ROUTER_NETGEAR_WNDR3300 3
+#define ROUTER_NETGEAR_WNR3500L 4
+
#ifdef CONFIG_SSB
extern struct ssb_bus ssb_bcm47xx;
#endif
@@ -344,11 +351,87 @@ find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
return part->size;
}
+static int get_router(void)
+{
+ char buf[20];
+ u32 boardnum = 0;
+ u16 boardtype = 0;
+ u16 boardrev = 0;
+ u32 boardflags = 0;
+ u16 sdram_init = 0;
+ u16 cardbus = 0;
+
+ if (nvram_getenv("boardnum", buf, sizeof(buf)) >= 0 ||
+ cfe_getenv("boardnum", buf, sizeof(buf)) >= 0)
+ boardnum = simple_strtoul(buf, NULL, 0);
+ if (nvram_getenv("boardtype", buf, sizeof(buf)) >= 0 ||
+ cfe_getenv("boardtype", buf, sizeof(buf)) >= 0)
+ boardtype = simple_strtoul(buf, NULL, 0);
+ if (nvram_getenv("boardrev", buf, sizeof(buf)) >= 0 ||
+ cfe_getenv("boardrev", buf, sizeof(buf)) >= 0)
+ boardrev = simple_strtoul(buf, NULL, 0);
+ if (nvram_getenv("boardflags", buf, sizeof(buf)) >= 0 ||
+ cfe_getenv("boardflags", buf, sizeof(buf)) >= 0)
+ boardflags = simple_strtoul(buf, NULL, 0);
+ if (nvram_getenv("sdram_init", buf, sizeof(buf)) >= 0 ||
+ cfe_getenv("sdram_init", buf, sizeof(buf)) >= 0)
+ sdram_init = simple_strtoul(buf, NULL, 0);
+ if (nvram_getenv("cardbus", buf, sizeof(buf)) >= 0 ||
+ cfe_getenv("cardbus", buf, sizeof(buf)) >= 0)
+ cardbus = simple_strtoul(buf, NULL, 0);
+
+ if ((boardnum == 8 || boardnum == 01)
+ && boardtype == 0x0472 && cardbus == 1) {
+ /* Netgear WNR834B, Netgear WNR834Bv2 */
+ return ROUTER_NETGEAR_WNR834B;
+ }
+
+ if (boardnum == 01 && boardtype == 0x0472 && boardrev == 0x23) {
+ /* Netgear WNDR-3300 */
+ return ROUTER_NETGEAR_WNDR3300;
+ }
+
+ if ((boardnum == 83258 || boardnum == 01)
+ && boardtype == 0x048e
+ && (boardrev == 0x11 || boardrev == 0x10)
+ && boardflags == 0x750
+ && sdram_init == 0x000A) {
+ /* Netgear WGR614v8/L/WW 16MB ram, cfe v1.3 or v1.5 */
+ return ROUTER_NETGEAR_WGR614L;
+ }
+
+ if ((boardnum == 1 || boardnum == 3500)
+ && boardtype == 0x04CF
+ && (boardrev == 0x1213 || boardrev == 02)) {
+ /* Netgear WNR3500v2/U/L */
+ return ROUTER_NETGEAR_WNR3500L;
+ }
+
+ return 0;
+}
+
struct mtd_partition * __init
init_mtd_partitions(struct mtd_info *mtd, size_t size)
{
int cfe_size;
int dual_image_offset = 0;
+ /* e.g Netgear 0x003e0000-0x003f0000 : "board_data", we exclude this
+ * part from our mapping to prevent overwriting len/checksum on e.g.
+ * Netgear WGR614v8/L/WW
+ */
+ int board_data_size = 0;
+
+ switch (get_router()) {
+ case ROUTER_NETGEAR_WGR614L:
+ case ROUTER_NETGEAR_WNR834B:
+ case ROUTER_NETGEAR_WNDR3300:
+ case ROUTER_NETGEAR_WNR3500L:
+ /* Netgear: checksum is @ 0x003AFFF8 for 4M flash or checksum
+ * is @ 0x007AFFF8 for 8M flash
+ */
+ board_data_size = 4 * mtd->erasesize;
+ break;
+ }
if ((cfe_size = find_cfe_size(mtd,size)) < 0)
return NULL;
@@ -374,7 +457,7 @@ init_mtd_partitions(struct mtd_info *mtd, size_t size)
if (cfe_size != 384 * 1024) {
bcm47xx_parts[1].offset = bcm47xx_parts[0].size;
bcm47xx_parts[1].size = bcm47xx_parts[3].offset - dual_image_offset -
- bcm47xx_parts[1].offset;
+ bcm47xx_parts[1].offset - board_data_size;
} else {
/* do not count the elf loader, which is on one block */
bcm47xx_parts[1].offset = bcm47xx_parts[0].size +
@@ -382,12 +465,14 @@ init_mtd_partitions(struct mtd_info *mtd, size_t size)
bcm47xx_parts[1].size = size -
bcm47xx_parts[0].size -
(2*bcm47xx_parts[3].size) -
- mtd->erasesize;
+ mtd->erasesize - board_data_size;
}
/* find and size rootfs */
find_root(mtd,size,&bcm47xx_parts[2]);
- bcm47xx_parts[2].size = size - dual_image_offset - bcm47xx_parts[2].offset - bcm47xx_parts[3].size;
+ bcm47xx_parts[2].size = size - dual_image_offset -
+ bcm47xx_parts[2].offset -
+ bcm47xx_parts[3].size - board_data_size;
return bcm47xx_parts;
}