+++ /dev/null
-/*
- * Handle mapping of the flash memory access routines
- * on Amazon based devices.
- *
- * Copyright(C) 2004 peng.liu@infineon.com
- *
- * This code is GPLed
- *
- */
-// 000005:fchang 2005/6/2 Modified by Bingtao to double check if the EBU is enabled/disabled
-// 506231:tc.chen 2005/06/23 increase firmware partition size form 192KB to 256KB
-// 050701:linmars 2005/07/01 fix flash size wrong alignment after increase firmware partition
-// 165001:henryhsu 2005/8/18 Remove the support for Intel flash because of 2.1 not enough rootfs partition size
-// 165001:henryhsu 2005/9/7 Rolback to support INtel flash
-// 509071:tc.chen 2005/09/07 Reduced flash writing time
-// 511046:linmars 2005/11/04 change bootloader size from 128 into 64
-// 511241:linmars 2005/11/24 merge TaiChen's IRM patch
-
-// copyright 2005 infineon
-
-// copyright 2007 john crispin <blogic@openwrt.org>
-// copyright 2007 felix fietkau <nbd@openwrt.org>
-// copyright 2009 hauke mehrtens <hauke@hauke-m.de>
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <asm/io.h>
-
-#include <linux/init.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/cfi.h>
-#include <linux/mutex.h>
-#include <linux/platform_device.h>
-#include <asm/amazon/amazon.h>
-
-#define AMAZON_PCI_ARB_CTL_ALT 0xb100205c
-#define AMAZON_MTD_REG32( addr ) (*(volatile u32 *)(addr))
-
-
-static struct map_info amazon_map = {
- .name = "AMAZON_FLASH",
- .bankwidth = 2,
-};
-
-static map_word amazon_read16(struct map_info * map, unsigned long ofs)
-{
- map_word temp;
- ofs ^= 2;
- temp.x[0] = *((__u16 *) (map->virt + ofs));
- return temp;
-}
-
-static void amazon_write16(struct map_info *map, map_word d, unsigned long adr)
-{
- adr ^= 2;
- *((__u16 *) (map->virt + adr)) = d.x[0];
-}
-
-void amazon_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
-{
- u8 *p;
- u8 *to_8;
- from = (unsigned long) (from + map->virt);
- p = (u8 *) from;
- to_8 = (u8 *) to;
- while(len--){
- *to_8++ = *p++;
- }
-}
-
-void amazon_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
-{
- u8 *p = (u8*) from;
- u8 *to_8;
- to += (unsigned long) map->virt;
- to_8 = (u8*)to;
- while(len--){
- *p++ = *to_8++;
- }
-}
-
-#define UBOOT_SIZE 0x40000
-
-static struct mtd_partition amazon_partitions[3] = {
- {
- name:"U-Boot", /* U-Boot firmware */
- offset:0x00000000,
- size:UBOOT_SIZE , /* 128k */
- },
- {
- name:"kernel", /* firmware */
- offset:UBOOT_SIZE,
- size:0x00100000, /* 192K */
- },
- {
- name:"rootfs", /* default partition */
- offset:0x00200000,
- size:0x00200000,
- },
-};
-
-unsigned long uImage_size = 0x10000d;
-
-int find_uImage_size(unsigned long start_offset)
-{
- unsigned long magic;
- unsigned long temp;
- amazon_copy_from(&amazon_map, &magic, start_offset, 4);
- if (!(ntohl(magic) == 0x27051956)) {
- printk(KERN_INFO "amazon_mtd: invalid magic (0x%08X) of kernel at 0x%08lx \n", ntohl(magic), start_offset);
- return 0;
- }
- amazon_copy_from(&amazon_map, &temp, start_offset + 12, 4);
- printk(KERN_INFO "amazon_mtd: kernel size is %ld \n", temp + 0x40);
- return temp + 0x40;
-}
-
-static int amazon_mtd_probe(struct platform_device *dev)
-{
- unsigned long uimage_size;
- struct mtd_info *mymtd = NULL;
- struct mtd_partition *parts = NULL;
-
- *AMAZON_EBU_BUSCON0 = 0x1d7ff;
-
- amazon_map.read = amazon_read16;
- amazon_map.write = amazon_write16;
- amazon_map.copy_from = amazon_copy_from;
- amazon_map.copy_to = amazon_copy_to;
-
- amazon_map.phys = dev->resource->start;
- amazon_map.size = dev->resource->end - amazon_map.phys + 1;
- amazon_map.virt = ioremap_nocache(amazon_map.phys, amazon_map.size);
-
- if (!amazon_map.virt) {
- printk(KERN_WARNING "amazon_mtd: Failed to ioremap!\n");
- return -EIO;
- }
-
- mymtd = (struct mtd_info *) do_map_probe("cfi_probe", &amazon_map);
- if (!mymtd) {
- iounmap(amazon_map.virt);
- printk(KERN_WARNING "amazon_mtd: probing failed\n");
- return -ENXIO;
- }
-
- mymtd->owner = THIS_MODULE;
- parts = &amazon_partitions[0];
-
- /* Some Samsung devices are containing a 16 MB flash chip with a bigger U-Boot partition. */
- if(mymtd->size == 0x01000000 && mymtd->erasesize == 0x00020000) {
- printk(KERN_INFO "amazon_mtd: Found big flash chip!\n");
- amazon_partitions[0].size = 0x60000;
- amazon_partitions[1].offset = 0x60000;
- uimage_size = find_uImage_size(amazon_partitions[1].offset);
- amazon_partitions[1].size = uimage_size;
- amazon_partitions[2].offset = 0x60000 + uimage_size;
- amazon_partitions[2].size = mymtd->size - amazon_partitions[2].offset - mymtd->erasesize;
- } else {
- printk(KERN_INFO "amazon_mtd: Found small flash chip!\n");
- uimage_size = find_uImage_size(amazon_partitions[1].offset);
- amazon_partitions[1].size = uimage_size;
- amazon_partitions[2].offset = UBOOT_SIZE + uimage_size;
- amazon_partitions[2].size = mymtd->size - amazon_partitions[2].offset - (2 * mymtd->erasesize);
- }
-
- mtd_device_register(mymtd, parts, 3);
-
- printk(KERN_INFO "amazon_mtd: added %s flash with %dMB\n",
- amazon_map.name, ((int)mymtd->size) >> 20);
- return 0;
-}
-
-static struct platform_driver amazon_mtd_driver = {
- .probe = amazon_mtd_probe,
- .driver = {
- .name = "amazon_mtd",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init amazon_mtd_init(void)
-{
- int ret = platform_driver_register(&amazon_mtd_driver);
- if (ret)
- printk(KERN_WARNING "amazon_mtd: error registering platfom driver!\n");
- return ret;
-}
-
-static void __exit amazon_mtd_cleanup(void)
-{
- platform_driver_unregister(&amazon_mtd_driver);
-}
-
-module_init(amazon_mtd_init);
-module_exit(amazon_mtd_cleanup);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("john crispin blogic@openwrt.org");
-MODULE_DESCRIPTION("MTD map driver for AMAZON boards");
-
projects / openwrt / svn-archive / archive.git / blobdiff