272 строки
6.9 KiB
C
272 строки
6.9 KiB
C
/*
|
|
* Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
|
|
* Mike Albon <malbon@openwrt.org>
|
|
* Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
|
|
*
|
|
* 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/slab.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 <linux/io.h>
|
|
|
|
#include <asm/mach-bcm63xx/bcm963xx_tag.h>
|
|
|
|
#define BCM63XX_BUSWIDTH 2 /* Buswidth */
|
|
#define BCM63XX_EXTENDED_SIZE 0xBFC00000 /* Extended flash address */
|
|
|
|
#define PFX KBUILD_MODNAME ": "
|
|
|
|
static struct mtd_partition *parsed_parts;
|
|
|
|
static struct mtd_info *bcm963xx_mtd_info;
|
|
|
|
static struct map_info bcm963xx_map = {
|
|
.name = "bcm963xx",
|
|
.bankwidth = BCM63XX_BUSWIDTH,
|
|
};
|
|
|
|
static int parse_cfe_partitions(struct mtd_info *master,
|
|
struct mtd_partition **pparts)
|
|
{
|
|
/* CFE, NVRAM and global Linux are always present */
|
|
int nrparts = 3, curpart = 0;
|
|
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->kernel_address, "%u", &kerneladdr);
|
|
sscanf(buf->kernel_length, "%u", &kernellen);
|
|
sscanf(buf->total_length, "%u", &totallen);
|
|
tagversion = &(buf->tag_version[0]);
|
|
boardid = &(buf->board_id[0]);
|
|
|
|
printk(KERN_INFO PFX "CFE boot tag found with version %s "
|
|
"and board type %s\n", tagversion, boardid);
|
|
|
|
kerneladdr = kerneladdr - BCM63XX_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);
|
|
if (!r) {
|
|
dev_err(&pdev->dev, "no resource supplied\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
bcm963xx_map.phys = r->start;
|
|
bcm963xx_map.size = resource_size(r);
|
|
bcm963xx_map.virt = ioremap(r->start, resource_size(r));
|
|
if (!bcm963xx_map.virt) {
|
|
dev_err(&pdev->dev, "failed to ioremap\n");
|
|
return -EIO;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "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) {
|
|
dev_err(&pdev->dev, "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) {
|
|
dev_info(&pdev->dev, "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 {
|
|
dev_info(&pdev->dev, "unsupported bootloader\n");
|
|
err = -ENODEV;
|
|
goto err_probe;
|
|
}
|
|
|
|
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 driver for CFE and RedBoot");
|
|
MODULE_AUTHOR("Daniel Dickinson <openwrt@cshore.neomailbox.net>");
|
|
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
|
|
MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
|