/*
* Flash device on the ADM5120 board
*
- * Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005
+ * Copyright Florian Fainelli <florian@openwrt.org>
+ *
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
#include <linux/kernel.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/vmalloc.h>
+
#define FLASH_PHYS_ADDR 0x1FC00000
-#define FLASH_SIZE 0x200000
+#define FLASH_SIZE 0x400000
+
+#define IMAGE_LEN 10 /* Length of Length Field */
+#define ADDRESS_LEN 12 /* Length of Address field */
+#define EXTENDED_SIZE 0xBFC00000 /* Extended flash address */
+#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
+
static struct mtd_info *adm5120_mtd;
+static struct mtd_partition *parsed_parts;
static struct map_info adm5120_mtd_map = {
- .name = "ADM5120",
+ .name = "adm5120",
.size = FLASH_SIZE,
.bankwidth = 2,
.phys = FLASH_PHYS_ADDR,
};
+static int parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts)
+{
+ int nrparts = 2, curpart = 0; // CFE and NVRAM always present.
+ struct adm5120_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 adm5120_cfe_map));
+
+ if (!buf)
+ return -ENOMEM;
+
+ // Get the tag
+ ret = master->read(master,master->erasesize,sizeof(struct adm5120_cfe_map), &retlen, (void *)buf);
+
+ if (retlen != sizeof(struct adm5120_cfe_map)){
+ vfree(buf);
+ return -EIO;
+ };
+
+ printk("adm5120: 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("adm5120: 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 int adm5120_detect_cfe(struct mtd_info *master)
+{
+ int idoffset = 0x4e0;
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ static char idstring[8] = "CFE1CFE1";
+#else
+ static char idstring[8] = "1EFC1EFC";
+#endif
+ char buf[8];
+ int ret;
+ size_t retlen;
+
+ ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
+ printk("adm5120: Read Signature value of %s\n", buf);
+ return strcmp(idstring,buf);
+}
+
static int __init adm5120_mtd_init(void)
{
- printk(KERN_INFO "ADM5120 board flash (0x%x at 0x%x)\n", FLASH_SIZE,
+ printk(KERN_INFO "ADM5120 board flash (0x%08x at 0x%08x)\n", FLASH_SIZE,
FLASH_PHYS_ADDR);
- adm5120_mtd_map.virt = ioremap_nocache(FLASH_PHYS_ADDR, FLASH_SIZE);
+
+ adm5120_mtd_map.virt = ioremap(FLASH_PHYS_ADDR, FLASH_SIZE);
+
+ if (!adm5120_mtd_map.virt) {
+ printk("ADM5120: failed to ioremap\n");
+ return -EIO;
+ }
+
simple_map_init(&adm5120_mtd_map);
+
adm5120_mtd = do_map_probe("cfi_probe", &adm5120_mtd_map);
+
if (adm5120_mtd) {
adm5120_mtd->owner = THIS_MODULE;
- add_mtd_device(adm5120_mtd);
+
+ if (adm5120_detect_cfe(adm5120_mtd) == 0)
+ {
+ int parsed_nr_parts = 0;
+ char * part_type;
+
+ printk("adm5120: CFE bootloader detected\n");
+
+ if (parsed_nr_parts == 0) {
+ int ret = parse_cfe_partitions(adm5120_mtd, &parsed_parts);
+
+ if (ret > 0) {
+ part_type = "CFE";
+ parsed_nr_parts = ret;
+ }
+ }
+ add_mtd_partitions(adm5120_mtd, parsed_parts, parsed_nr_parts);
+ return 0;
+ } else {
+ add_mtd_device(adm5120_mtd);
+ }
return 0;
}
+ iounmap(adm5120_mtd);
return -ENXIO;
}
static void __exit adm5120_mtd_exit(void)
{
- del_mtd_device(adm5120_mtd);
- map_destroy(adm5120_mtd);
+ if (adm5120_mtd) {
+ del_mtd_device(adm5120_mtd);
+ map_destroy(adm5120_mtd);
+ }
+
+ if (adm5120_mtd_map.virt) {
+ iounmap(adm5120_mtd_map.virt);
+ adm5120_mtd_map.virt = 0;
+ }
+
}
module_init(adm5120_mtd_init);
module_exit(adm5120_mtd_exit);
MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)");
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
MODULE_DESCRIPTION("MTD map driver for ADM5120 boards");
projects / openwrt / svn-archive / archive.git / blobdiff