--- /dev/null
+/*
+ * $Id$
+ * Copyright (C) 2006 Florian Fainelli <florian@openwrt.org>
+ * Mike Albon <malbon@openwrt.org>
+ * Copyright (C) $Date$ $Author$
+ *
+ * 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
+ */
+
+/* This is the BCM963xx flash map driver, in its actual state it only supports BCM96348 devices
+ * this driver is able to manage both bootloader we found on these boards : CFE and RedBoot
+ *
+ * RedBoot :
+ * - this bootloader allows us to parse partitions and therefore deduce the MTD partition table
+ *
+ * CFE :
+ * - CFE partitionning can be detected as for BCM947xx devices
+ *
+ */
+
+#include <asm/io.h>
+#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 <board.h>
+
+#define WINDOW_ADDR 0x1FC00000 /* Real address of the flash */
+#define WINDOW_SIZE 0x400000 /* Size of flash */
+#define BUSWIDTH 2 /* Buswidth */
+#define EXTENDED_SIZE 0xBFC00000 /* Extended flash address */
+#define IMAGE_LEN 10 /* Length of Length Field */
+#define ADDRESS_LEN 12 /* Length of Address field */
+#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
+
+extern int boot_loader_type; /* For RedBoot / CFE detection */
+extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
+static struct mtd_partition *parsed_parts;
+
+static void __exit bcm963xx_mtd_cleanup(void);
+
+static struct mtd_info *bcm963xx_mtd_info;
+
+static struct map_info bcm963xx_map = {
+ .name = "bcm963xx",
+ .size = WINDOW_SIZE,
+ .bankwidth = BUSWIDTH,
+ .phys = WINDOW_ADDR,
+};
+
+
+int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
+{
+ int nrparts = 2, curpart = 0; // CFE and NVRAM always present.
+ struct bcm963xx_cfe_map {
+ unsigned char tagVersion[4]; // Version of the image tag
+ unsigned char sig_1[20]; // Company Line 1
+ unsigned char sig_2[14]; // Company Line 2
+ unsigned char chipid[6]; // Chip this image is for
+ unsigned char boardid[16]; // Board name
+ unsigned char bigEndian[2]; // Map endianness -- 1 BE 0 LE
+ unsigned char totalLength[IMAGE_LEN]; //Total length of image
+ unsigned char cfeAddress[ADDRESS_LEN]; // Address in memory of CFE
+ unsigned char cfeLength[IMAGE_LEN]; // Size of CFE
+ unsigned char rootAddress[ADDRESS_LEN]; // Address in memory of rootfs
+ unsigned char rootLength[IMAGE_LEN]; // Size of rootfs
+ unsigned char kernelAddress[ADDRESS_LEN]; // Address in memory of kernel
+ unsigned char kernelLength[IMAGE_LEN]; // Size of kernel
+ unsigned char dualImage[2]; // Unused at present
+ unsigned char inactiveFlag[2]; // Unused at present
+ unsigned char reserved1[74]; // Reserved area not in use
+ unsigned char imageCRC[4]; // CRC32 of images
+ unsigned char reserved2[16]; // Unused at present
+ unsigned char headerCRC[4]; // CRC32 of header excluding tagVersion
+ unsigned char reserved3[16]; // Unused at present
+ } *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;
+ // Allocate memory for buffer
+ buf = vmalloc(sizeof(struct bcm963xx_cfe_map));
+
+ if (!buf)
+ return -ENOMEM;
+
+ // Get the tag
+ ret = master->read(master,master->erasesize,sizeof(struct bcm963xx_cfe_map), &retlen, (void *)buf);
+ if (retlen != sizeof(struct bcm963xx_cfe_map)){
+ vfree(buf);
+ return -EIO;
+ };
+ printk("bcm963xx: CFE boot tag found with version %s and board type %s.\n",buf->tagVersion,buf->boardid);
+ // Get the values and calculate
+ sscanf(buf->rootAddress,"%u", &rootfsaddr);
+ rootfsaddr = rootfsaddr - EXTENDED_SIZE;
+ sscanf(buf->rootLength, "%u", &rootfslen);
+ sscanf(buf->kernelAddress, "%u", &kerneladdr);
+ kerneladdr = kerneladdr - EXTENDED_SIZE;
+ sscanf(buf->kernelLength, "%u", &kernellen);
+ sscanf(buf->totalLength, "%u", &totallen);
+ spareaddr = ROUNDUP(totallen,master->erasesize) + master->erasesize;
+ sparelen = master->size - spareaddr - master->erasesize;
+ // Determine number of partitions
+ namelen = 8;
+ if (rootfslen > 0){
+ nrparts++;
+ namelen =+ 6;
+ };
+ if (kernellen > 0){
+ nrparts++;
+ namelen =+ 6;
+ };
+ if (sparelen > 0){
+ nrparts++;
+ namelen =+ 6;
+ };
+ // Ask kernel for more memory.
+ parts = kmalloc(sizeof(*parts)*nrparts+10*nrparts, GFP_KERNEL);
+ if (!parts){
+ vfree(buf);
+ return -ENOMEM;
+ };
+ memset(parts,0,sizeof(*parts)*nrparts+10*nrparts);
+ // 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;
+ curpart++;
+ };
+ if (sparelen > 0){
+ parts[curpart].name = "OpenWrt";
+ parts[curpart].offset = spareaddr;
+ parts[curpart].size = sparelen;
+ curpart++;
+ };
+ parts[curpart].name = "NVRAM";
+ parts[curpart].offset = master->size - master->erasesize;
+ parts[curpart].size = master->erasesize;
+ for (i = 0; i < nrparts; i++) {
+ printk("bcm963xx: Partition %d is %s offset %x and length %x\n", i, parts[i].name, parts[i].offset, parts[i].size);
+ }
+ *pparts = parts;
+ vfree(buf);
+ return nrparts;
+};
+
+static struct mtd_partition bcm963xx_parts[] = {
+ { name: "bootloader", size: 0, offset: 0, mask_flags: MTD_WRITEABLE },
+ { name: "rootfs", size: 0, offset: 0},
+ { name: "jffs2", size: 5 * 0x10000, offset: 57*0x10000}
+};
+
+static int bcm963xx_parts_size = sizeof(bcm963xx_parts) / sizeof(bcm963xx_parts[0]);
+
+static int bcm963xx_detect_cfe(struct mtd_info *master)
+{
+ int idoffset = 0x4e0;
+ static char idstring[8] = "CFE1CFE1";
+ char buf[8];
+ int ret;
+ size_t retlen;
+
+ ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
+ printk("bcm963xx: Read Signature value of %s\n", buf);
+ return strcmp(idstring,buf);
+}
+
+static int __init bcm963xx_mtd_init(void)
+{
+ printk("bcm963xx: 0x%08x at 0x%08x\n", WINDOW_SIZE, WINDOW_ADDR);
+ bcm963xx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
+
+ if (!bcm963xx_map.virt) {
+ printk("bcm963xx: Failed to ioremap\n");
+ return -EIO;
+ }
+
+ simple_map_init(&bcm963xx_map);
+
+ bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
+
+ if (bcm963xx_mtd_info) {
+ bcm963xx_mtd_info->owner = THIS_MODULE;
+
+ //if (boot_loader_type == BOOT_CFE)
+ if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0)
+ {
+ int parsed_nr_parts = 0;
+ char * part_type;
+ printk("bcm963xx: CFE bootloader detected\n");
+ //add_mtd_device(bcm963xx_mtd_info);
+ //add_mtd_partitions(bcm963xx_mtd_info, bcm963xx_parts, bcm963xx_parts_size);
+ 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;
+ }
+ }
+ add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
+ return 0;
+ }
+ else
+ {
+ int parsed_nr_parts = 0;
+ char * part_type;
+
+ if (bcm963xx_mtd_info->size > 0x00400000) {
+ printk("Support for extended flash memory size : 0x%08X ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd_info->size);
+ bcm963xx_map.virt = (unsigned long)(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
+ add_mtd_partitions(bcm963xx_mtd_info, parsed_parts, parsed_nr_parts);
+
+ return 0;
+ }
+ }
+ iounmap(bcm963xx_map.virt);
+ return -ENXIO;
+}
+
+static void __exit bcm963xx_mtd_cleanup(void)
+{
+ 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;
+ }
+}
+
+module_init(bcm963xx_mtd_init);
+module_exit(bcm963xx_mtd_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org> Mike Albon <malbon@openwrt.org>");
projects / openwrt.git / blobdiff