--- /dev/null
+diff -urN linux.old/drivers/mtd/maps/ar7-flash.c linux.dev/drivers/mtd/maps/ar7-flash.c
+--- linux.old/drivers/mtd/maps/ar7-flash.c 1970-01-01 01:00:00.000000000 +0100
++++ linux.dev/drivers/mtd/maps/ar7-flash.c 2005-07-22 04:35:26.624453992 +0200
+@@ -0,0 +1,267 @@
++/*
++ * $Id$
++ *
++ * Normal mappings of chips in physical memory
++ */
++
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <asm/io.h>
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/map.h>
++#include <linux/config.h>
++#include <linux/mtd/partitions.h>
++#include <linux/squashfs_fs.h>
++
++#define WINDOW_ADDR CONFIG_MTD_AR7_START
++#define WINDOW_SIZE CONFIG_MTD_AR7_LEN
++#define BUSWIDTH CONFIG_MTD_AR7_BUSWIDTH
++
++#include <asm/mips-boards/prom.h>
++extern char *prom_getenv(char *name);
++
++static int create_mtd_partitions(void);
++static void __exit ar7_mtd_cleanup(void);
++
++#define MAX_NUM_PARTITIONS 5
++static struct mtd_partition ar7_partinfo[MAX_NUM_PARTITIONS];
++
++static struct mtd_info *ar7_mtd_info;
++
++__u8 ar7_read8(struct map_info *map, unsigned long ofs)
++{
++ return __raw_readb(map->map_priv_1 + ofs);
++}
++
++__u16 ar7_read16(struct map_info *map, unsigned long ofs)
++{
++ return __raw_readw(map->map_priv_1 + ofs);
++}
++
++__u32 ar7_read32(struct map_info *map, unsigned long ofs)
++{
++ return __raw_readl(map->map_priv_1 + ofs);
++}
++
++void ar7_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
++{
++ memcpy_fromio(to, map->map_priv_1 + from, len);
++}
++
++void ar7_write8(struct map_info *map, __u8 d, unsigned long adr)
++{
++ __raw_writeb(d, map->map_priv_1 + adr);
++ mb();
++}
++
++void ar7_write16(struct map_info *map, __u16 d, unsigned long adr)
++{
++ __raw_writew(d, map->map_priv_1 + adr);
++ mb();
++}
++
++void ar7_write32(struct map_info *map, __u32 d, unsigned long adr)
++{
++ __raw_writel(d, map->map_priv_1 + adr);
++ mb();
++}
++
++void ar7_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
++{
++ memcpy_toio(map->map_priv_1 + to, from, len);
++}
++
++struct map_info ar7_map = {
++ name: "Physically mapped flash",
++ size: WINDOW_SIZE,
++ buswidth: BUSWIDTH,
++ read8: ar7_read8,
++ read16: ar7_read16,
++ read32: ar7_read32,
++ copy_from: ar7_copy_from,
++ write8: ar7_write8,
++ write16: ar7_write16,
++ write32: ar7_write32,
++ copy_to: ar7_copy_to
++};
++
++int __init ar7_mtd_init(void)
++{
++ int partitions;
++
++ printk(KERN_NOTICE "ar7 flash device: 0x%lx at 0x%lx.\n", (unsigned long)WINDOW_SIZE, (unsigned long)WINDOW_ADDR);
++ ar7_map.map_priv_1 = (unsigned long)ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
++
++ if (!ar7_map.map_priv_1) {
++ printk("Failed to ioremap\n");
++ return -EIO;
++ }
++
++ ar7_mtd_info = do_map_probe("cfi_probe", &ar7_map);
++ if (!ar7_mtd_info)
++ {
++ ar7_mtd_cleanup();
++ return -ENXIO;
++ }
++
++ ar7_mtd_info->module = THIS_MODULE;
++
++ if (!(partitions = create_mtd_partitions()))
++ add_mtd_device(ar7_mtd_info);
++ else
++ add_mtd_partitions(ar7_mtd_info, ar7_partinfo, partitions);
++
++ return 0;
++}
++
++static char *strdup(char *str)
++{
++ int n = strlen(str)+1;
++ char *s = kmalloc(n, GFP_KERNEL);
++ if (!s) return NULL;
++ return strcpy(s, str);
++}
++
++
++static int create_mtd_partitions(void)
++{
++ unsigned int offset;
++ unsigned int size;
++ unsigned int found = 0;
++ unsigned int p = 0;
++ unsigned char *flash_base;
++ unsigned char *flash_end;
++ char *env_ptr;
++ char *base_ptr;
++ char *end_ptr;
++ unsigned int adam2_size = 0x20000;
++ unsigned int config_offset = WINDOW_SIZE;
++ unsigned int rootfs_start = 0xe0000;
++
++ printk("Parsing ADAM2 partition map...\n");
++
++ do {
++ char env_name[20];
++
++ /* get base and end addresses of flash file system from environment */
++ sprintf(env_name, "mtd%1u", p);
++ printk("Looking for mtd device :%s:\n", env_name);
++
++ env_ptr = prom_getenv(env_name);
++ if(env_ptr == NULL) {
++ /* No more partitions to find */
++ break;
++ }
++
++ /* Extract the start and stop addresses of the partition */
++ base_ptr = strtok(env_ptr, ",");
++ end_ptr = strtok(NULL, ",");
++ if ((base_ptr == NULL) || (end_ptr == NULL)) {
++ printk("ADAM2 partition error: Invalid %s start,end.\n", env_name);
++ break;
++ }
++
++ flash_base = (unsigned char*) simple_strtol(base_ptr, NULL, 0);
++ flash_end = (unsigned char*) simple_strtol(end_ptr, NULL, 0);
++ if((!flash_base) || (!flash_end)) {
++ printk("ADAM2 partition error: Invalid %s start,end.\n", env_name);
++ break;
++ }
++
++ offset = virt_to_bus(flash_base) - WINDOW_ADDR;
++ size = flash_end - flash_base;
++ printk("Found a %s image (0x%x), with size (0x%x).\n",env_name, offset, size);
++
++
++ if (offset == 0) {
++ printk("Assuming adam2 size of 0x%x\n", size);
++ adam2_size = size; // boot loader
++ } else if (offset > 0x120000) {
++ if (config_offset > offset)
++ config_offset = offset; // reserved at the end of the flash chip
++ } else if (offset > 0x30000) {
++ printk("Assuming default rootfs offset of 0x%x\n", offset);
++ rootfs_start = offset; // probably root fs
++ }
++
++ p++;
++ } while (p < MAX_NUM_PARTITIONS);
++
++ p = 0;
++
++ ar7_partinfo[p].name = strdup("adam2");
++ ar7_partinfo[p].offset = 0;
++ ar7_partinfo[p].size = adam2_size;
++ ar7_partinfo[p++].mask_flags = 0;
++
++ ar7_partinfo[p].name = strdup("linux");
++ ar7_partinfo[p].offset = adam2_size;
++ ar7_partinfo[p].size = config_offset - adam2_size;
++ ar7_partinfo[p++].mask_flags = 0;
++
++ if (ar7_read32(&ar7_map, adam2_size) == 0xfeedfa42) {
++ rootfs_start = ar7_read32(&ar7_map, adam2_size + 4) + adam2_size + 28;
++ printk("Setting new rootfs offset to %08x\n", rootfs_start);
++ }
++
++ ar7_partinfo[p].name = strdup("rootfs");
++ ar7_partinfo[p].offset = rootfs_start;
++ ar7_partinfo[p].size = config_offset - rootfs_start;
++
++ ar7_partinfo[p++].mask_flags = 0;
++
++ ar7_partinfo[p].name = strdup("config");
++ ar7_partinfo[p].offset = config_offset;
++ ar7_partinfo[p].size = WINDOW_SIZE - config_offset;
++ ar7_partinfo[p++].mask_flags = 0;
++
++ if (ar7_read32(&ar7_map, rootfs_start) == SQUASHFS_MAGIC) {
++ int newsize, newoffset;
++ squashfs_super_block sb;
++
++ ar7_copy_from(&ar7_map, &sb, rootfs_start, sizeof(sb));
++ printk("Squashfs detected (size = 0x%08x)\n", sb.bytes_used);
++
++ newoffset = rootfs_start + sb.bytes_used;
++
++ if ((newoffset % ar7_mtd_info->erasesize) > 0)
++ newoffset += ar7_mtd_info->erasesize - (newoffset % ar7_mtd_info->erasesize);
++
++ ar7_partinfo[p - 2].size = newoffset - rootfs_start;
++
++ ar7_partinfo[p].name = strdup("OpenWrt");
++ ar7_partinfo[p].offset = newoffset;
++ ar7_partinfo[p].size = config_offset - newoffset;
++ ar7_partinfo[p++].mask_flags = 0;
++ } else {
++ printk("Unknown filesystem. Moving rootfs partition to next erase block");
++ if ((rootfs_start % ar7_mtd_info->erasesize) > 0) {
++ ar7_partinfo[p - 2].offset += ar7_mtd_info->erasesize - (rootfs_start % ar7_mtd_info->erasesize);
++ ar7_partinfo[p - 2].size -= ar7_mtd_info->erasesize - (rootfs_start % ar7_mtd_info->erasesize);
++ }
++ }
++
++ return p;
++}
++
++static void __exit ar7_mtd_cleanup(void)
++{
++ if (ar7_mtd_info) {
++ del_mtd_partitions(ar7_mtd_info);
++ del_mtd_device(ar7_mtd_info);
++ map_destroy(ar7_mtd_info);
++ }
++
++ if (ar7_map.map_priv_1) {
++ iounmap((void *)ar7_map.map_priv_1);
++ ar7_map.map_priv_1 = 0;
++ }
++}
++
++module_init(ar7_mtd_init);
++module_exit(ar7_mtd_cleanup);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Felix Fietkau");
++MODULE_DESCRIPTION("AR7 CFI map driver");
+diff -urN linux.old/drivers/mtd/maps/Config.in linux.dev/drivers/mtd/maps/Config.in
+--- linux.old/drivers/mtd/maps/Config.in 2005-07-21 05:36:32.414242296 +0200
++++ linux.dev/drivers/mtd/maps/Config.in 2005-07-21 06:29:04.067118232 +0200
+@@ -48,6 +48,21 @@
+ fi
+
+ if [ "$CONFIG_MIPS" = "y" ]; then
++ if [ "$CONFIG_AR7" = "y" ]; then
++ dep_tristate ' Flash chip mapping on Texas Instruments AR7' CONFIG_MTD_AR7 $CONFIG_MTD_CFI $CONFIG_MTD_PARTITIONS
++ dep_bool ' Use defaults for Texas Instruments AR7' CONFIG_MTD_AR7_DEFAULTS $CONFIG_MTD_AR7
++ if [ "$CONFIG_MTD_AR7" = "y" -o "$CONFIG_MTD_AR7" = "m" ]; then
++ if [ "$CONFIG_MTD_AR7_DEFAULTS" = "y" ]; then
++ define_hex CONFIG_MTD_AR7_START 0x10000000
++ define_hex CONFIG_MTD_AR7_LEN 0x400000
++ define_int CONFIG_MTD_AR7_BUSWIDTH 2
++ else
++ hex ' Physical start address of flash mapping' CONFIG_MTD_AR7_START 0x10000000
++ hex ' Physical length of flash mapping' CONFIG_MTD_AR7_LEN 0x400000
++ int ' Bus width in octets' CONFIG_MTD_AR7_BUSWIDTH 2
++ fi
++ fi
++ fi
+ dep_tristate ' Pb1000 MTD support' CONFIG_MTD_PB1000 $CONFIG_MIPS_PB1000
+ dep_tristate ' Pb1500 MTD support' CONFIG_MTD_PB1500 $CONFIG_MIPS_PB1500
+ dep_tristate ' Pb1100 MTD support' CONFIG_MTD_PB1100 $CONFIG_MIPS_PB1100
+diff -urN linux.old/drivers/mtd/maps/Makefile linux.dev/drivers/mtd/maps/Makefile
+--- linux.old/drivers/mtd/maps/Makefile 2005-07-21 05:36:32.414242296 +0200
++++ linux.dev/drivers/mtd/maps/Makefile 2005-07-21 06:56:33.265401984 +0200
+@@ -10,6 +10,7 @@
+ endif
+
+ # Chip mappings
++obj-$(CONFIG_MTD_AR7) += ar7-flash.o
+ obj-$(CONFIG_MTD_CDB89712) += cdb89712.o
+ obj-$(CONFIG_MTD_ARM_INTEGRATOR)+= integrator-flash.o
+ obj-$(CONFIG_MTD_CFI_FLAGADM) += cfi_flagadm.o
projects / openwrt.git / blobdiff