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port the brcm-2.4 flash map driver changes to 2.6

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git-svn-id: svn://svn.openwrt.org/openwrt/branches/buildroot-ng/openwrt@4061 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2006-06-23 19:53:20 +00:00
parent e325df1263
commit 52aafe7489
1 changed files with 188 additions and 53 deletions
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241
target/linux/brcm-2.6/patches/002-flash-map.patch
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@ -1,10 +1,11 @@
diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-flash/drivers/mtd/maps/bcm47xx-flash.c
--- linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.15-rc5-flash/drivers/mtd/maps/bcm47xx-flash.c 2005-12-19 00:33:31.276241000 +0100
@@ -0,0 +1,316 @@
diff -urN linux.old/drivers/mtd/maps/bcm47xx-flash.c linux.dev/drivers/mtd/maps/bcm47xx-flash.c
--- linux.old/drivers/mtd/maps/bcm47xx-flash.c 1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/drivers/mtd/maps/bcm47xx-flash.c 2006-06-23 19:54:06.000000000 +0200
@@ -0,0 +1,451 @@
+/*
+ * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
+ * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
+ *
+ * original functions for finding root filesystem from Mike Baker
+ *
@ -43,18 +44,24 @@ diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-fla
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <linux/wait.h>
+#include <linux/config.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#ifdef CONFIG_MTD_PARTITIONS
+#include <linux/mtd/partitions.h>
+#endif
+#include <linux/config.h>
+#include <linux/squashfs_fs.h>
+#include <linux/jffs2.h>
+#include <linux/crc32.h>
+#include <asm/io.h>
+
+#include <trxhdr.h>
+
+#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
+#define NVRAM_SPACE 0x8000
+#define WINDOW_ADDR 0x1c000000
+#define WINDOW_SIZE (0x400000*2)
+#define WINDOW_SIZE 0x800000
+#define BUSWIDTH 2
+
+static struct mtd_info *bcm947xx_mtd;
@ -104,13 +111,15 @@ diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-fla
+ unsigned char buf[512];
+ int off;
+ size_t len;
+ int cfe_size_flag;
+ int blocksize;
+
+ trx = (struct trx_header *) buf;
+
+ cfe_size_flag=0;
+ blocksize = mtd->erasesize;
+ if (blocksize < 0x10000)
+ blocksize = 0x10000;
+
+ for (off = (256*1024); off < size; off += mtd->erasesize) {
+ for (off = (128*1024); off < size; off += blocksize) {
+ memset(buf, 0xe5, sizeof(buf));
+
+ /*
@ -122,9 +131,8 @@ diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-fla
+
+ /* found a TRX header */
+ if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
+ goto done;
+ goto found;
+ }
+ cfe_size_flag += 1;
+ }
+
+ printk(KERN_NOTICE
@ -132,42 +140,115 @@ diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-fla
+ mtd->name);
+ return -1;
+
+ done:
+ printk(KERN_NOTICE "bootloader size flag: %d\n", cfe_size_flag);
+ return cfe_size_flag;
+ found:
+ printk(KERN_NOTICE "bootloader size: %d\n", off);
+ return off;
+
+}
+
+/*
+ * Copied from mtdblock.c
+ *
+ * Cache stuff...
+ *
+ * Since typical flash erasable sectors are much larger than what Linux's
+ * buffer cache can handle, we must implement read-modify-write on flash
+ * sectors for each block write requests. To avoid over-erasing flash sectors
+ * and to speed things up, we locally cache a whole flash sector while it is
+ * being written to until a different sector is required.
+ */
+
+static void erase_callback(struct erase_info *done)
+{
+ wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
+ wake_up(wait_q);
+}
+
+static int erase_write (struct mtd_info *mtd, unsigned long pos,
+ int len, const char *buf)
+{
+ struct erase_info erase;
+ DECLARE_WAITQUEUE(wait, current);
+ wait_queue_head_t wait_q;
+ size_t retlen;
+ int ret;
+
+ /*
+ * First, let's erase the flash block.
+ */
+
+ init_waitqueue_head(&wait_q);
+ erase.mtd = mtd;
+ erase.callback = erase_callback;
+ erase.addr = pos;
+ erase.len = len;
+ erase.priv = (u_long)&wait_q;
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&wait_q, &wait);
+
+ ret = MTD_ERASE(mtd, &erase);
+ if (ret) {
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&wait_q, &wait);
+ printk (KERN_WARNING "erase of region [0x%lx, 0x%x] "
+ "on \"%s\" failed\n",
+ pos, len, mtd->name);
+ return ret;
+ }
+
+ schedule(); /* Wait for erase to finish. */
+ remove_wait_queue(&wait_q, &wait);
+
+ /*
+ * Next, writhe data to flash.
+ */
+
+ ret = MTD_WRITE (mtd, pos, len, &retlen, buf);
+ if (ret)
+ return ret;
+ if (retlen != len)
+ return -EIO;
+ return 0;
+}
+
+
+
+
+static int __init
+find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
+{
+ struct trx_header *trx;
+ unsigned char buf[512];
+ int off;
+ struct trx_header trx, *trx2;
+ unsigned char buf[512], *block;
+ int off, blocksize;
+ u32 i, crc = ~0;
+ size_t len;
+ struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
+
+ trx = (struct trx_header *) buf;
+ blocksize = mtd->erasesize;
+ if (blocksize < 0x10000)
+ blocksize = 0x10000;
+
+ for (off = (256*1024); off < size; off += mtd->erasesize) {
+ memset(buf, 0xe5, sizeof(buf));
+ for (off = (128*1024); off < size; off += blocksize) {
+ memset(&trx, 0xe5, sizeof(trx));
+
+ /*
+ * Read into buffer
+ */
+ if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
+ len != sizeof(buf))
+ if (MTD_READ(mtd, off, sizeof(trx), &len, (char *) &trx) ||
+ len != sizeof(trx))
+ continue;
+
+ /* found a TRX header */
+ if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
+ part->offset = le32_to_cpu(trx->offsets[2]) ? :
+ le32_to_cpu(trx->offsets[1]);
+ part->size = le32_to_cpu(trx->len);
+ if (le32_to_cpu(trx.magic) == TRX_MAGIC) {
+ part->offset = le32_to_cpu(trx.offsets[2]) ? :
+ le32_to_cpu(trx.offsets[1]);
+ part->size = le32_to_cpu(trx.len);
+
+ part->size -= part->offset;
+ part->offset += off;
+
+ goto done;
+ goto found;
+ }
+ }
+
@ -176,39 +257,93 @@ diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-fla
+ mtd->name);
+ return -1;
+
+ done:
+ found:
+ if (part->size == 0)
+ return 0;
+
+ if (MTD_READ(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf))
+ return 0;
+
+ if (*((__u32 *) buf) == SQUASHFS_MAGIC) {
+ printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n", mtd->name, (u32) sb->bytes_used);
+
+ /* Update the squashfs partition size based on the superblock info */
+ part->size = sb->bytes_used;
+ len = part->offset + part->size;
+ len += (mtd->erasesize - 1);
+ len &= ~(mtd->erasesize - 1);
+ part->size = len - part->offset;
+ } else if (*((__u16 *) buf) == JFFS2_MAGIC_BITMASK) {
+ printk(KERN_INFO "%s: Filesystem type: jffs2\n", mtd->name);
+
+ /* Move the squashfs outside of the trx */
+ part->size = 0;
+ } else {
+ printk(KERN_INFO "%s: Filesystem type: unknown\n", mtd->name);
+ return 0;
+ }
+
+ if (trx.len != part->offset + part->size - off) {
+ /* Update the trx offsets and length */
+ trx.len = part->offset + part->size - off;
+
+ /* Update the trx crc32 */
+ for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) {
+ if (MTD_READ(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf))
+ return 0;
+ crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i));
+ }
+ trx.crc32 = crc;
+
+ /* read first eraseblock from the trx */
+ block = kmalloc(mtd->erasesize, GFP_KERNEL);
+ trx2 = (struct trx_header *) block;
+ if (MTD_READ(mtd, off, mtd->erasesize, &len, block) || len != mtd->erasesize) {
+ printk("Error accessing the first trx eraseblock\n");
+ return 0;
+ }
+
+ printk("Updating TRX offsets and length:\n");
+ printk("old trx = [0x%08x, 0x%08x, 0x%08x], len=0x%08x crc32=0x%08x\n", trx2->offsets[0], trx2->offsets[1], trx2->offsets[2], trx2->len, trx2->crc32);
+ printk("new trx = [0x%08x, 0x%08x, 0x%08x], len=0x%08x crc32=0x%08x\n", trx.offsets[0], trx.offsets[1], trx.offsets[2], trx.len, trx.crc32);
+
+ /* Write updated trx header to the flash */
+ memcpy(block, &trx, sizeof(trx));
+ if (mtd->unlock)
+ mtd->unlock(mtd, off, mtd->erasesize);
+ erase_write(mtd, off, mtd->erasesize, block);
+ if (mtd->sync)
+ mtd->sync(mtd);
+ kfree(block);
+ printk("Done\n");
+ }
+
+ return part->size;
+}
+
+struct mtd_partition * __init
+init_mtd_partitions(struct mtd_info *mtd, size_t size)
+{
+ int cfe_size;
+
+ int cfe_size_flag;
+
+ /* if cfe_size_flag=0, cfe size is 256 kb, else 384 kb */
+ cfe_size_flag = find_cfe_size(mtd, size);
+ cfe_size = find_cfe_size(mtd,size);
+
+ /* boot loader */
+ bcm947xx_parts[0].offset = 0;
+ if (cfe_size_flag == 0) {
+ bcm947xx_parts[0].size = 1024*256;
+ } else {
+ /* netgear wgt634u has 384 kb bootloader */
+ bcm947xx_parts[0].size = 1024*384;
+ }
+ bcm947xx_parts[0].size = cfe_size;
+
+ /* nvram */
+ if (cfe_size_flag == 0) {
+ bcm947xx_parts[3].offset = size - mtd->erasesize;
+ if (cfe_size != 384 * 1024) {
+ bcm947xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
+ bcm947xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
+ } else {
+ /* nvram (old 128kb config partition on netgear wgt634u) */
+ bcm947xx_parts[3].offset = bcm947xx_parts[0].size;
+ bcm947xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
+ }
+ bcm947xx_parts[3].size = mtd->erasesize;
+
+ /* linux (kernel and rootfs) */
+ if (cfe_size_flag == 0) {
+ if (cfe_size != 384 * 1024) {
+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
+ bcm947xx_parts[1].size = bcm947xx_parts[3].offset -
+ bcm947xx_parts[1].offset;
@ -227,11 +362,11 @@ diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-fla
+ /* entirely jffs2 */
+ bcm947xx_parts[4].name = NULL;
+ bcm947xx_parts[2].size = size - bcm947xx_parts[2].offset -
+ bcm947xx_parts[3].size;
+ bcm947xx_parts[3].size;
+ } else {
+ /* legacy setup */
+ /* calculate leftover flash, and assign it to the jffs2 partition */
+ if (cfe_size_flag == 0) {
+ if (cfe_size != 384 * 1024) {
+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
+ bcm947xx_parts[2].size;
+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
@ -318,9 +453,9 @@ diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-fla
+
+module_init(init_bcm947xx_map);
+module_exit(cleanup_bcm947xx_map);
diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/Kconfig linux-2.6.15-rc5-flash/drivers/mtd/maps/Kconfig
--- linux-2.6.15-rc5/drivers/mtd/maps/Kconfig 2005-12-04 06:10:42.000000000 +0100
+++ linux-2.6.15-rc5-flash/drivers/mtd/maps/Kconfig 2005-12-18 19:36:11.555087000 +0100
diff -urN linux.old/drivers/mtd/maps/Kconfig linux.dev/drivers/mtd/maps/Kconfig
--- linux.old/drivers/mtd/maps/Kconfig 2006-06-23 19:13:51.000000000 +0200
+++ linux.dev/drivers/mtd/maps/Kconfig 2006-06-23 18:47:58.000000000 +0200
@@ -299,6 +299,12 @@
Mapping for the Flaga digital module. If you don't have one, ignore
this setting.
@ -334,10 +469,10 @@ diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/Kconfig linux-2.6.15-rc5-flash/drive
config MTD_BEECH
tristate "CFI Flash device mapped on IBM 405LP Beech"
depends on MTD_CFI && BEECH
diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/Makefile linux-2.6.15-rc5-flash/drivers/mtd/maps/Makefile
--- linux-2.6.15-rc5/drivers/mtd/maps/Makefile 2005-12-04 06:10:42.000000000 +0100
+++ linux-2.6.15-rc5-flash/drivers/mtd/maps/Makefile 2005-12-18 19:36:11.555087000 +0100
@@ -31,6 +31,7 @@
diff -urN linux.old/drivers/mtd/maps/Makefile linux.dev/drivers/mtd/maps/Makefile
--- linux.old/drivers/mtd/maps/Makefile 2006-06-23 19:13:51.000000000 +0200
+++ linux.dev/drivers/mtd/maps/Makefile 2006-06-23 18:47:58.000000000 +0200
@@ -30,6 +30,7 @@
obj-$(CONFIG_MTD_PCMCIA) += pcmciamtd.o
obj-$(CONFIG_MTD_RPXLITE) += rpxlite.o
obj-$(CONFIG_MTD_TQM8XXL) += tqm8xxl.o