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openwrt-xburst/target/linux/brcm63xx/patches-2.6.32/040-bcm963xx_flashmap.patch
florian 58dcac852c [brcm63xx] flashmap and image generation: reduced union bcm_tag to a single struct 
combining the elements so that it is no longer necessary to create an openwrt-only
tagid and tagcrc, and elimate the tagid detection and switch statements which
made dealing with imagetags overly complicated, especially since the logic would
need analogs in all code that touched the imagetag. Patch from cshore.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20652 3c298f89-4303-0410-b956-a3cf2f4a3e73
2010-04-01 21:20:43 +00:00

390 lines
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From e734ace5baa04e0e8af1d4483475fbd6bd2b32a1 Mon Sep 17 00:00:00 2001
From: Axel Gembe <ago@bastart.eu.org>
Date: Mon, 12 May 2008 18:54:09 +0200
Subject: [PATCH] bcm963xx: flashmap support
Signed-off-by: Axel Gembe <ago@bastart.eu.org>
---
drivers/mtd/maps/Kconfig | 7 +++++++
drivers/mtd/maps/Makefile | 1 +
drivers/mtd/redboot.c | 13 ++++++++++---
3 files changed, 18 insertions(+), 3 deletions(-)
Index: linux-2.6.32.10/drivers/mtd/maps/Kconfig
===================================================================
--- linux-2.6.32.10.orig/drivers/mtd/maps/Kconfig 2010-03-29 06:35:59.987293878 -0400
+++ linux-2.6.32.10/drivers/mtd/maps/Kconfig 2010-03-29 06:37:14.968545954 -0400
@@ -259,6 +259,13 @@
help
Flash memory access on AMD Alchemy Pb/Db/RDK Reference Boards
+config MTD_BCM963XX
+ tristate "BCM963xx Flash device"
+ depends on MIPS && BCM63XX
+ help
+ Flash memory access on BCM963xx boards. Currently only works with
+ RedBoot and CFE.
+
config MTD_DILNETPC
tristate "CFI Flash device mapped on DIL/Net PC"
depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
Index: linux-2.6.32.10/drivers/mtd/redboot.c
===================================================================
--- linux-2.6.32.10.orig/drivers/mtd/redboot.c 2010-03-29 06:36:00.017292877 -0400
+++ linux-2.6.32.10/drivers/mtd/redboot.c 2010-03-29 06:37:14.968545954 -0400
@@ -39,7 +39,7 @@
return 1;
}
-static int parse_redboot_partitions(struct mtd_info *master,
+int parse_redboot_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
unsigned long fis_origin)
{
@@ -162,6 +162,14 @@
goto out;
}
+ if (!fis_origin) {
+ for (i = 0; i < numslots; i++) {
+ if (!strncmp(buf[i].name, "RedBoot", 8)) {
+ fis_origin = (buf[i].flash_base & (master->size << 1) - 1);
+ }
+ }
+ }
+
for (i = 0; i < numslots; i++) {
struct fis_list *new_fl, **prev;
@@ -184,9 +192,8 @@
new_fl->img = &buf[i];
if (fis_origin) {
buf[i].flash_base -= fis_origin;
- } else {
- buf[i].flash_base &= master->size-1;
}
+ buf[i].flash_base &= (master->size << 1) - 1;
/* I'm sure the JFFS2 code has done me permanent damage.
* I now think the following is _normal_
Index: linux-2.6.32.10/drivers/mtd/maps/Makefile
===================================================================
--- linux-2.6.32.10.orig/drivers/mtd/maps/Makefile 2010-03-29 06:35:59.947294290 -0400
+++ linux-2.6.32.10/drivers/mtd/maps/Makefile 2010-03-29 06:37:14.968545954 -0400
@@ -61,3 +61,4 @@
obj-$(CONFIG_MTD_RBTX4939) += rbtx4939-flash.o
obj-$(CONFIG_MTD_VMU) += vmu-flash.o
obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o
+obj-$(CONFIG_MTD_BCM963XX) += bcm963xx-flash.o
Index: linux-2.6.32.10/drivers/mtd/maps/bcm963xx-flash.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.32.10/drivers/mtd/maps/bcm963xx-flash.c 2010-03-29 13:33:58.797288897 -0400
@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2006-2008 Florian Fainelli <florian@openwrt.org>
+ * Mike Albon <malbon@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/vmalloc.h>
+#include <linux/platform_device.h>
+
+#include <bcm_tag.h>
+#include <asm/io.h>
+
+#define BUSWIDTH 2 /* Buswidth */
+#define EXTENDED_SIZE 0xBFC00000 /* Extended flash address */
+
+#define PFX KBUILD_MODNAME ": "
+
+extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
+static struct mtd_partition *parsed_parts;
+
+static struct mtd_info *bcm963xx_mtd_info;
+
+static struct map_info bcm963xx_map = {
+ .name = "bcm963xx",
+ .bankwidth = BUSWIDTH,
+};
+
+
+static int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
+{
+ int nrparts = 3, curpart = 0; /* CFE,NVRAM and global LINUX are always present. */
+ struct bcm_tag *buf;
+ struct mtd_partition *parts;
+ int ret;
+ size_t retlen;
+ unsigned int rootfsaddr, kerneladdr, spareaddr;
+ unsigned int rootfslen, kernellen, sparelen, totallen;
+ int namelen = 0;
+ int i;
+ char *boardid;
+ char *tagversion;
+
+ /* Allocate memory for buffer */
+ buf = vmalloc(sizeof(struct bcm_tag));
+ if (!buf)
+ return -ENOMEM;
+
+ /* Get the tag */
+ ret = master->read(master,master->erasesize,sizeof(struct bcm_tag), &retlen, (void *)buf);
+ if (retlen != sizeof(struct bcm_tag)){
+ vfree(buf);
+ return -EIO;
+ }
+
+ sscanf(buf->kernelAddress, "%u", &kerneladdr);
+ sscanf(buf->kernelLength, "%u", &kernellen);
+ sscanf(buf->totalLength, "%u", &totallen);
+ tagversion = &(buf->tagVersion[0]);
+ boardid = &(buf->boardid[0]);
+
+ printk(KERN_INFO PFX "CFE boot tag found with version %s and board type %s\n",tagversion, boardid);
+
+ kerneladdr = kerneladdr - EXTENDED_SIZE;
+ rootfsaddr = kerneladdr + kernellen;
+ spareaddr = roundup(totallen, master->erasesize) + master->erasesize;
+ sparelen = master->size - spareaddr - master->erasesize;
+ rootfslen = spareaddr - rootfsaddr;
+
+ /* Determine number of partitions */
+ namelen = 8;
+ if (rootfslen > 0){
+ nrparts++;
+ namelen =+ 6;
+ };
+ if (kernellen > 0) {
+ nrparts++;
+ namelen =+ 6;
+ };
+
+ /* Ask kernel for more memory */
+ parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
+ if (!parts) {
+ vfree(buf);
+ return -ENOMEM;
+ };
+
+ /* Start building partition list */
+ parts[curpart].name = "CFE";
+ parts[curpart].offset = 0;
+ parts[curpart].size = master->erasesize;
+ curpart++;
+
+ if (kernellen > 0) {
+ parts[curpart].name = "kernel";
+ parts[curpart].offset = kerneladdr;
+ parts[curpart].size = kernellen;
+ curpart++;
+ };
+
+ if (rootfslen > 0) {
+ parts[curpart].name = "rootfs";
+ parts[curpart].offset = rootfsaddr;
+ parts[curpart].size = rootfslen;
+ if (sparelen > 0)
+ parts[curpart].size += sparelen;
+ curpart++;
+ };
+
+ parts[curpart].name = "nvram";
+ parts[curpart].offset = master->size - master->erasesize;
+ parts[curpart].size = master->erasesize;
+
+ /* Global partition "linux" to make easy firmware upgrade */
+ curpart++;
+ parts[curpart].name = "linux";
+ parts[curpart].offset = parts[0].size;
+ parts[curpart].size = master->size - parts[0].size - parts[3].size;
+
+ for (i = 0; i < nrparts; i++)
+ 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));
+
+ printk(KERN_INFO PFX "Spare partition is %x offset and length %x\n", spareaddr, sparelen);
+ *pparts = parts;
+ vfree(buf);
+
+ return nrparts;
+};
+
+static int bcm963xx_detect_cfe(struct mtd_info *master)
+{
+ int idoffset = 0x4e0;
+ static char idstring[8] = "CFE1CFE1";
+ char buf[9];
+ int ret;
+ size_t retlen;
+
+ ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
+ buf[retlen] = 0;
+ printk(KERN_INFO PFX "Read Signature value of %s\n", buf);
+
+ return strncmp(idstring, buf, 8);
+}
+
+static int bcm963xx_probe(struct platform_device *pdev)
+{
+ int err = 0;
+ int parsed_nr_parts = 0;
+ char *part_type;
+ struct resource *r;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ bcm963xx_map.phys = r->start;
+ bcm963xx_map.size = (r->end - r->start) + 1;
+ bcm963xx_map.virt = ioremap(r->start, r->end - r->start + 1);
+
+ if (!bcm963xx_map.virt) {
+ printk(KERN_ERR PFX "Failed to ioremap\n");
+ return -EIO;
+ }
+ printk(KERN_INFO PFX "0x%08lx at 0x%08x\n", bcm963xx_map.size, bcm963xx_map.phys);
+
+ simple_map_init(&bcm963xx_map);
+
+ bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
+ if (!bcm963xx_mtd_info) {
+ printk(KERN_ERR PFX "Failed to probe using CFI\n");
+ err = -EIO;
+ goto err_probe;
+ }
+
+ bcm963xx_mtd_info->owner = THIS_MODULE;
+
+ /* This is mutually exclusive */
+ if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0) {
+ printk(KERN_INFO PFX "CFE bootloader detected\n");
+ if (parsed_nr_parts == 0) {
+ int ret = parse_cfe_partitions(bcm963xx_mtd_info, &parsed_parts);
+ if (ret > 0) {
+ part_type = "CFE";
+ parsed_nr_parts = ret;
+ }
+ }
+ } else {
+ printk(KERN_INFO PFX "assuming RedBoot bootloader\n");
+ if (bcm963xx_mtd_info->size > 0x00400000) {
+ printk(KERN_INFO PFX "Support for extended flash memory size : 0x%lx ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd_info->size);
+ bcm963xx_map.virt = (u32)(EXTENDED_SIZE);
+ }
+
+#ifdef CONFIG_MTD_REDBOOT_PARTS
+ if (parsed_nr_parts == 0) {
+ int ret = parse_redboot_partitions(bcm963xx_mtd_info, &parsed_parts, 0);
+ if (ret > 0) {
+ part_type = "RedBoot";
+ parsed_nr_parts = ret;
+ }
+ }
+#endif
+ }
+
+ return add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
+
+err_probe:
+ iounmap(bcm963xx_map.virt);
+ return err;
+}
+
+static int bcm963xx_remove(struct platform_device *pdev)
+{
+ if (bcm963xx_mtd_info) {
+ del_mtd_partitions(bcm963xx_mtd_info);
+ map_destroy(bcm963xx_mtd_info);
+ }
+
+ if (bcm963xx_map.virt) {
+ iounmap(bcm963xx_map.virt);
+ bcm963xx_map.virt = 0;
+ }
+
+ return 0;
+}
+
+static struct platform_driver bcm63xx_mtd_dev = {
+ .probe = bcm963xx_probe,
+ .remove = bcm963xx_remove,
+ .driver = {
+ .name = "bcm963xx-flash",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init bcm963xx_mtd_init(void)
+{
+ return platform_driver_register(&bcm63xx_mtd_dev);
+}
+
+static void __exit bcm963xx_mtd_exit(void)
+{
+ platform_driver_unregister(&bcm63xx_mtd_dev);
+}
+
+module_init(bcm963xx_mtd_init);
+module_exit(bcm963xx_mtd_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Broadcom BCM63xx MTD partition parser/mapping for CFE and RedBoot");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
Index: linux-2.6.32.10/arch/mips/bcm63xx/boards/board_bcm963xx.c
===================================================================
--- linux-2.6.32.10.orig/arch/mips/bcm63xx/boards/board_bcm963xx.c 2010-03-29 06:35:59.927292275 -0400
+++ linux-2.6.32.10/arch/mips/bcm63xx/boards/board_bcm963xx.c 2010-03-29 06:37:35.178541753 -0400
@@ -722,20 +722,6 @@
return 0;
}
-static struct mtd_partition mtd_partitions[] = {
- {
- .name = "cfe",
- .offset = 0x0,
- .size = 0x40000,
- }
-};
-
-static struct physmap_flash_data flash_data = {
- .width = 2,
- .nr_parts = ARRAY_SIZE(mtd_partitions),
- .parts = mtd_partitions,
-};
-
static struct resource mtd_resources[] = {
{
.start = 0, /* filled at runtime */
@@ -745,12 +731,9 @@
};
static struct platform_device mtd_dev = {
- .name = "physmap-flash",
+ .name = "bcm963xx-flash",
.resource = mtd_resources,
.num_resources = ARRAY_SIZE(mtd_resources),
- .dev = {
- .platform_data = &flash_data,
- },
};
/*
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