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brcm47xx: add some more partition parser fixes by Rafał Miłecki

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SVN-Revision: 35912
v19.07.3_mercusys_ac12_duma
Hauke Mehrtens 11 years ago
parent 694050a4cf
commit 44ed7d664a
4 changed files with 156 additions and 14 deletions
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61
target/linux/brcm47xx/patches-3.8/024-Revert-mtd-bcm47xxpart-improve-probing-of-nvram-part.patch
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@ -0,0 +1,61 @@
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -19,6 +19,12 @@
/* 10 parts were found on sflash on Netgear WNDR4500 */
#define BCM47XXPART_MAX_PARTS 12
+/*
+ * Amount of bytes we read when analyzing each block of flash memory.
+ * Set it big enough to allow detecting partition and reading important data.
+ */
+#define BCM47XXPART_BYTES_TO_READ 0x404
+
/* Magics */
#define BOARD_DATA_MAGIC 0x5246504D /* MPFR */
#define POT_MAGIC1 0x54544f50 /* POTT */
@@ -57,17 +63,14 @@ static int bcm47xxpart_parse(struct mtd_
struct trx_header *trx;
int trx_part = -1;
int last_trx_part = -1;
- int max_bytes_to_read = 0x8004;
if (blocksize <= 0x10000)
blocksize = 0x10000;
- if (blocksize == 0x20000)
- max_bytes_to_read = 0x18004;
/* Alloc */
parts = kzalloc(sizeof(struct mtd_partition) * BCM47XXPART_MAX_PARTS,
GFP_KERNEL);
- buf = kzalloc(max_bytes_to_read, GFP_KERNEL);
+ buf = kzalloc(BCM47XXPART_BYTES_TO_READ, GFP_KERNEL);
/* Parse block by block looking for magics */
for (offset = 0; offset <= master->size - blocksize;
@@ -82,7 +85,7 @@ static int bcm47xxpart_parse(struct mtd_
}
/* Read beginning of the block */
- if (mtd_read(master, offset, max_bytes_to_read,
+ if (mtd_read(master, offset, BCM47XXPART_BYTES_TO_READ,
&bytes_read, (uint8_t *)buf) < 0) {
pr_err("mtd_read error while parsing (offset: 0x%X)!\n",
offset);
@@ -97,16 +100,9 @@ static int bcm47xxpart_parse(struct mtd_
}
/* Standard NVRAM */
- if (buf[0x000 / 4] == NVRAM_HEADER ||
- buf[0x1000 / 4] == NVRAM_HEADER ||
- buf[0x8000 / 4] == NVRAM_HEADER ||
- (blocksize == 0x20000 && (
- buf[0x10000 / 4] == NVRAM_HEADER ||
- buf[0x11000 / 4] == NVRAM_HEADER ||
- buf[0x18000 / 4] == NVRAM_HEADER))) {
+ if (buf[0x000 / 4] == NVRAM_HEADER) {
bcm47xxpart_add_part(&parts[curr_part++], "nvram",
offset, 0);
- offset = rounddown(offset, blocksize);
continue;
}

55
target/linux/brcm47xx/patches-3.8/025-mtd-bcm47xxpart-look-for-NVRAM-at-the-end-of-device.patch
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@ -0,0 +1,55 @@
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -63,6 +63,7 @@ static int bcm47xxpart_parse(struct mtd_
struct trx_header *trx;
int trx_part = -1;
int last_trx_part = -1;
+ int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
if (blocksize <= 0x10000)
blocksize = 0x10000;
@@ -99,13 +100,6 @@ static int bcm47xxpart_parse(struct mtd_
continue;
}
- /* Standard NVRAM */
- if (buf[0x000 / 4] == NVRAM_HEADER) {
- bcm47xxpart_add_part(&parts[curr_part++], "nvram",
- offset, 0);
- continue;
- }
-
/*
* board_data starts with board_id which differs across boards,
* but we can use 'MPFR' (hopefully) magic at 0x100
@@ -174,6 +168,30 @@ static int bcm47xxpart_parse(struct mtd_
continue;
}
}
+
+ /* Look for NVRAM at the end of the last block. */
+ for (i = 0; i < ARRAY_SIZE(possible_nvram_sizes); i++) {
+ if (curr_part > BCM47XXPART_MAX_PARTS) {
+ pr_warn("Reached maximum number of partitions, scanning stopped!\n");
+ break;
+ }
+
+ offset = master->size - possible_nvram_sizes[i];
+ if (mtd_read(master, offset, 0x4, &bytes_read,
+ (uint8_t *)buf) < 0) {
+ pr_err("mtd_read error while reading at offset 0x%X!\n",
+ offset);
+ continue;
+ }
+
+ /* Standard NVRAM */
+ if (buf[0] == NVRAM_HEADER) {
+ bcm47xxpart_add_part(&parts[curr_part++], "nvram",
+ master->size - blocksize, 0);
+ break;
+ }
+ }
+
kfree(buf);
/*

26
target/linux/brcm47xx/patches-3.8/026-mtd-bcm47xxpart-find-boot-partition-by-CFE-magic.patch
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@ -0,0 +1,26 @@
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -23,9 +23,10 @@
* Amount of bytes we read when analyzing each block of flash memory.
* Set it big enough to allow detecting partition and reading important data.
*/
-#define BCM47XXPART_BYTES_TO_READ 0x404
+#define BCM47XXPART_BYTES_TO_READ 0x4e8
/* Magics */
+#define CFE_MAGIC 0x43464531 /* 1EFC */
#define BOARD_DATA_MAGIC 0x5246504D /* MPFR */
#define POT_MAGIC1 0x54544f50 /* POTT */
#define POT_MAGIC2 0x504f /* OP */
@@ -93,8 +94,9 @@ static int bcm47xxpart_parse(struct mtd_
continue;
}
- /* CFE has small NVRAM at 0x400 */
- if (buf[0x400 / 4] == NVRAM_HEADER) {
+ /* Magic or small NVRAM at 0x400 */
+ if (buf[0x4e0 / 4] == CFE_MAGIC ||
+ buf[0x400 / 4] == NVRAM_HEADER) {
bcm47xxpart_add_part(&parts[curr_part++], "boot",
offset, MTD_WRITEABLE);
continue;

28
target/linux/brcm47xx/patches-3.8/024-mtd-bcm47xxpart-get-nvram.patch → target/linux/brcm47xx/patches-3.8/027-mtd-bcm47xxpart-get-nvram.patch
Unescape Escape View File

@ -1,34 +1,34 @@
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -58,6 +58,7 @@ static int bcm47xxpart_parse(struct mtd_
@@ -65,6 +65,7 @@ static int bcm47xxpart_parse(struct mtd_
int trx_part = -1;
int last_trx_part = -1;
int max_bytes_to_read = 0x8004;
int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
+ bool found_nvram = false;
if (blocksize <= 0x10000)
blocksize = 0x10000;
@@ -107,6 +108,7 @@ static int bcm47xxpart_parse(struct mtd_
@@ -190,12 +191,23 @@ static int bcm47xxpart_parse(struct mtd_
if (buf[0] == NVRAM_HEADER) {
bcm47xxpart_add_part(&parts[curr_part++], "nvram",
offset, 0);
offset = rounddown(offset, blocksize);
master->size - blocksize, 0);
+ found_nvram = true;
continue;
break;
}
@@ -194,6 +196,15 @@ static int bcm47xxpart_parse(struct mtd_
parts[trx_part].offset;
}
kfree(buf);
+ if (!found_nvram) {
+ pr_err("can not find a nvram partition reserve last block\n");
+ bcm47xxpart_add_part(&parts[curr_part++], "nvram_guess",
+ master->size - blocksize, MTD_WRITEABLE);
+ master->size - blocksize * 2, MTD_WRITEABLE);
+ for (i = 0; i < curr_part; i++) {
+ if (parts[i].size + parts[i].offset == master->size)
+ parts[i].offset -= blocksize;
+ parts[i].offset -= blocksize * 2;
+ }
+ }
*pparts = parts;
return curr_part;
};
+
/*
* Assume that partitions end at the beginning of the one they are
* followed by.
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