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b8720f5747
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6952 3c298f89-4303-0410-b956-a3cf2f4a3e73
278 lines
11 KiB
C
278 lines
11 KiB
C
/*
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* $Id$
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* Copyright (C) 2006 Florian Fainelli <florian@openwrt.org>
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* Mike Albon <malbon@openwrt.org>
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* Copyright (C) $Date$ $Author$
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* This is the BCM963xx flash map driver, in its actual state it only supports BCM96348 devices
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* this driver is able to manage both bootloader we found on these boards : CFE and RedBoot
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*
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* RedBoot :
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* - this bootloader allows us to parse partitions and therefore deduce the MTD partition table
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*
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* CFE :
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* - CFE partitionning can be detected as for BCM947xx devices
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*
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*/
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#include <asm/io.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/vmalloc.h>
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#include <board.h>
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#define WINDOW_ADDR 0x1FC00000 /* Real address of the flash */
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#define WINDOW_SIZE 0x400000 /* Size of flash */
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#define BUSWIDTH 2 /* Buswidth */
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#define EXTENDED_SIZE 0xBFC00000 /* Extended flash address */
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#define IMAGE_LEN 10 /* Length of Length Field */
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#define ADDRESS_LEN 12 /* Length of Address field */
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#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
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extern int boot_loader_type; /* For RedBoot / CFE detection */
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extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
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static struct mtd_partition *parsed_parts;
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static void __exit bcm963xx_mtd_cleanup(void);
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static struct mtd_info *bcm963xx_mtd_info;
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static struct map_info bcm963xx_map = {
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.name = "bcm963xx",
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.size = WINDOW_SIZE,
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.bankwidth = BUSWIDTH,
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.phys = WINDOW_ADDR,
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};
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int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
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{
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int nrparts = 2, curpart = 0; // CFE and NVRAM always present.
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struct bcm963xx_cfe_map {
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unsigned char tagVersion[4]; // Version of the image tag
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unsigned char sig_1[20]; // Company Line 1
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unsigned char sig_2[14]; // Company Line 2
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unsigned char chipid[6]; // Chip this image is for
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unsigned char boardid[16]; // Board name
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unsigned char bigEndian[2]; // Map endianness -- 1 BE 0 LE
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unsigned char totalLength[IMAGE_LEN]; //Total length of image
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unsigned char cfeAddress[ADDRESS_LEN]; // Address in memory of CFE
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unsigned char cfeLength[IMAGE_LEN]; // Size of CFE
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unsigned char rootAddress[ADDRESS_LEN]; // Address in memory of rootfs
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unsigned char rootLength[IMAGE_LEN]; // Size of rootfs
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unsigned char kernelAddress[ADDRESS_LEN]; // Address in memory of kernel
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unsigned char kernelLength[IMAGE_LEN]; // Size of kernel
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unsigned char dualImage[2]; // Unused at present
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unsigned char inactiveFlag[2]; // Unused at present
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unsigned char reserved1[74]; // Reserved area not in use
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unsigned char imageCRC[4]; // CRC32 of images
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unsigned char reserved2[16]; // Unused at present
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unsigned char headerCRC[4]; // CRC32 of header excluding tagVersion
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unsigned char reserved3[16]; // Unused at present
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} *buf;
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struct mtd_partition *parts;
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int ret;
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size_t retlen;
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unsigned int rootfsaddr, kerneladdr, spareaddr;
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unsigned int rootfslen, kernellen, sparelen, totallen;
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int namelen = 0;
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int i;
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// Allocate memory for buffer
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buf = vmalloc(sizeof(struct bcm963xx_cfe_map));
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if (!buf)
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return -ENOMEM;
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// Get the tag
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ret = master->read(master,master->erasesize,sizeof(struct bcm963xx_cfe_map), &retlen, (void *)buf);
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if (retlen != sizeof(struct bcm963xx_cfe_map)){
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vfree(buf);
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return -EIO;
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};
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printk("bcm963xx: CFE boot tag found with version %s and board type %s.\n",buf->tagVersion,buf->boardid);
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// Get the values and calculate
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sscanf(buf->rootAddress,"%u", &rootfsaddr);
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rootfsaddr = rootfsaddr - EXTENDED_SIZE;
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sscanf(buf->rootLength, "%u", &rootfslen);
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sscanf(buf->kernelAddress, "%u", &kerneladdr);
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kerneladdr = kerneladdr - EXTENDED_SIZE;
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sscanf(buf->kernelLength, "%u", &kernellen);
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sscanf(buf->totalLength, "%u", &totallen);
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spareaddr = ROUNDUP(totallen,master->erasesize) + master->erasesize;
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sparelen = master->size - spareaddr - master->erasesize;
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// Determine number of partitions
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namelen = 8;
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if (rootfslen > 0){
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nrparts++;
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namelen =+ 6;
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};
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if (kernellen > 0){
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nrparts++;
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namelen =+ 6;
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};
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if (sparelen > 0){
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nrparts++;
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namelen =+ 6;
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};
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// Ask kernel for more memory.
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parts = kmalloc(sizeof(*parts)*nrparts+10*nrparts, GFP_KERNEL);
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if (!parts){
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vfree(buf);
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return -ENOMEM;
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};
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memset(parts,0,sizeof(*parts)*nrparts+10*nrparts);
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// Start building partition list
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parts[curpart].name = "CFE";
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parts[curpart].offset = 0;
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parts[curpart].size = master->erasesize;
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curpart++;
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if (kernellen > 0){
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parts[curpart].name = "Kernel";
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parts[curpart].offset = kerneladdr;
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parts[curpart].size = kernellen;
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curpart++;
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};
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if (rootfslen > 0){
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parts[curpart].name = "Rootfs";
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parts[curpart].offset = rootfsaddr;
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parts[curpart].size = rootfslen;
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curpart++;
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};
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if (sparelen > 0){
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parts[curpart].name = "OpenWrt";
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parts[curpart].offset = spareaddr;
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parts[curpart].size = sparelen;
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curpart++;
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};
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parts[curpart].name = "NVRAM";
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parts[curpart].offset = master->size - master->erasesize;
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parts[curpart].size = master->erasesize;
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for (i = 0; i < nrparts; i++) {
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printk("bcm963xx: Partition %d is %s offset %x and length %x\n", i, parts[i].name, parts[i].offset, parts[i].size);
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}
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*pparts = parts;
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vfree(buf);
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return nrparts;
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};
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static struct mtd_partition bcm963xx_parts[] = {
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{ name: "bootloader", size: 0, offset: 0, mask_flags: MTD_WRITEABLE },
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{ name: "rootfs", size: 0, offset: 0},
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{ name: "jffs2", size: 5 * 0x10000, offset: 57*0x10000}
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};
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static int bcm963xx_parts_size = sizeof(bcm963xx_parts) / sizeof(bcm963xx_parts[0]);
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static int bcm963xx_detect_cfe(struct mtd_info *master)
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{
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int idoffset = 0x4e0;
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static char idstring[8] = "CFE1CFE1";
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char buf[8];
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int ret;
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size_t retlen;
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ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
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printk("bcm963xx: Read Signature value of %s\n", buf);
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return strcmp(idstring,buf);
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}
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static int __init bcm963xx_mtd_init(void)
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{
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printk("bcm963xx: 0x%08x at 0x%08x\n", WINDOW_SIZE, WINDOW_ADDR);
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bcm963xx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
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if (!bcm963xx_map.virt) {
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printk("bcm963xx: Failed to ioremap\n");
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return -EIO;
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}
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simple_map_init(&bcm963xx_map);
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bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
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if (bcm963xx_mtd_info) {
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bcm963xx_mtd_info->owner = THIS_MODULE;
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//if (boot_loader_type == BOOT_CFE)
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if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0)
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{
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int parsed_nr_parts = 0;
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char * part_type;
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printk("bcm963xx: CFE bootloader detected\n");
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//add_mtd_device(bcm963xx_mtd_info);
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//add_mtd_partitions(bcm963xx_mtd_info, bcm963xx_parts, bcm963xx_parts_size);
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if (parsed_nr_parts == 0) {
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int ret = parse_cfe_partitions(bcm963xx_mtd_info, &parsed_parts);
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if (ret > 0) {
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part_type = "CFE";
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parsed_nr_parts = ret;
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}
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}
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add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
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return 0;
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}
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else
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{
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int parsed_nr_parts = 0;
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char * part_type;
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if (bcm963xx_mtd_info->size > 0x00400000) {
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printk("Support for extended flash memory size : 0x%08X ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd_info->size);
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bcm963xx_map.virt = (unsigned long)(EXTENDED_SIZE);
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}
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#ifdef CONFIG_MTD_REDBOOT_PARTS
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if (parsed_nr_parts == 0) {
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int ret = parse_redboot_partitions(bcm963xx_mtd_info, &parsed_parts, 0);
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if (ret > 0) {
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part_type = "RedBoot";
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parsed_nr_parts = ret;
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}
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}
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#endif
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add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
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return 0;
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}
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}
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iounmap(bcm963xx_map.virt);
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return -ENXIO;
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}
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static void __exit bcm963xx_mtd_cleanup(void)
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{
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if (bcm963xx_mtd_info) {
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del_mtd_partitions(bcm963xx_mtd_info);
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map_destroy(bcm963xx_mtd_info);
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}
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if (bcm963xx_map.virt) {
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iounmap(bcm963xx_map.virt);
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bcm963xx_map.virt = 0;
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}
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}
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module_init(bcm963xx_mtd_init);
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module_exit(bcm963xx_mtd_cleanup);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org> Mike Albon <malbon@openwrt.org>");
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