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git://projects.qi-hardware.com/openwrt-xburst.git
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[adm5120] remove 2.6.25 specific stuff
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12598 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
@@ -1,571 +0,0 @@
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/*
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* $Id$
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*
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* Platform driver for NOR flash devices on ADM5120 based boards
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*
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* Copyright (C) 2007 OpenWrt.org
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* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
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*
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* This file was derived from: drivers/mtd/map/physmap.c
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* Copyright (C) 2003 MontaVista Software Inc.
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* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#include <adm5120_defs.h>
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#include <adm5120_switch.h>
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#include <adm5120_mpmc.h>
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#include <adm5120_platform.h>
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#define DRV_NAME "adm5120-flash"
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#define DRV_DESC "ADM5120 flash MAP driver"
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#define MAX_PARSED_PARTS 8
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#ifdef ADM5120_FLASH_DEBUG
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#define MAP_DBG(m, f, a...) printk(KERN_INFO "%s: " f, (m->name) , ## a)
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#else
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#define MAP_DBG(m, f, a...) do {} while (0)
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#endif
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#define MAP_ERR(m, f, a...) printk(KERN_ERR "%s: " f, (m->name) , ## a)
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#define MAP_INFO(m, f, a...) printk(KERN_INFO "%s: " f, (m->name) , ## a)
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struct adm5120_map_info {
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struct map_info map;
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void (*switch_bank)(unsigned);
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unsigned long window_size;
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};
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struct adm5120_flash_info {
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struct mtd_info *mtd;
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struct resource *res;
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struct platform_device *dev;
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struct adm5120_map_info amap;
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#ifdef CONFIG_MTD_PARTITIONS
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int nr_parts;
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struct mtd_partition *parts[MAX_PARSED_PARTS];
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#endif
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};
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struct flash_desc {
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u32 phys;
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u32 srs_shift;
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};
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/*
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* Globals
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*/
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static DEFINE_SPINLOCK(adm5120_flash_spin);
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#define FLASH_LOCK() spin_lock(&adm5120_flash_spin)
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#define FLASH_UNLOCK() spin_unlock(&adm5120_flash_spin)
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static u32 flash_bankwidths[4] = { 1, 2, 4, 0 };
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static u32 flash_sizes[8] = {
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0, 512*1024, 1024*1024, 2*1024*1024,
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4*1024*1024, 0, 0, 0
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};
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static struct flash_desc flash_descs[2] = {
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{
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.phys = ADM5120_SRAM0_BASE,
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.srs_shift = MEMCTRL_SRS0_SHIFT,
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}, {
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.phys = ADM5120_SRAM1_BASE,
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.srs_shift = MEMCTRL_SRS1_SHIFT,
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}
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};
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static const char *probe_types[] = {
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"cfi_probe",
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"jedec_probe",
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"map_rom",
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NULL
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};
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#ifdef CONFIG_MTD_PARTITIONS
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static const char *parse_types[] = {
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"cmdlinepart",
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#ifdef CONFIG_MTD_REDBOOT_PARTS
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"RedBoot",
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#endif
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#ifdef CONFIG_MTD_MYLOADER_PARTS
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"MyLoader",
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#endif
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};
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#endif
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#define BANK_SIZE (2<<20)
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#define BANK_SIZE_MAX (4<<20)
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#define BANK_OFFS_MASK (BANK_SIZE-1)
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#define BANK_START_MASK (~BANK_OFFS_MASK)
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static inline struct adm5120_map_info *map_to_amap(struct map_info *map)
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{
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return (struct adm5120_map_info *)map;
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}
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static void adm5120_flash_switchbank(struct map_info *map,
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unsigned long ofs)
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{
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struct adm5120_map_info *amap = map_to_amap(map);
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unsigned bank;
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if (amap->switch_bank == NULL)
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return;
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bank = (ofs & BANK_START_MASK) >> 21;
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if (bank > 1)
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BUG();
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MAP_DBG(map, "switching to bank %u, ofs=%lX\n", bank, ofs);
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amap->switch_bank(bank);
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}
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static map_word adm5120_flash_read(struct map_info *map, unsigned long ofs)
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{
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struct adm5120_map_info *amap = map_to_amap(map);
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map_word ret;
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MAP_DBG(map, "reading from ofs %lX\n", ofs);
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if (ofs >= amap->window_size)
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return map_word_ff(map);
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FLASH_LOCK();
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adm5120_flash_switchbank(map, ofs);
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ret = inline_map_read(map, (ofs & (amap->window_size-1)));
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FLASH_UNLOCK();
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return ret;
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}
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static void adm5120_flash_write(struct map_info *map, const map_word datum,
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unsigned long ofs)
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{
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struct adm5120_map_info *amap = map_to_amap(map);
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MAP_DBG(map, "writing to ofs %lX\n", ofs);
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if (ofs > amap->window_size)
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return;
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FLASH_LOCK();
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adm5120_flash_switchbank(map, ofs);
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inline_map_write(map, datum, (ofs & (amap->window_size-1)));
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FLASH_UNLOCK();
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}
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static void adm5120_flash_copy_from(struct map_info *map, void *to,
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unsigned long from, ssize_t len)
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{
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struct adm5120_map_info *amap = map_to_amap(map);
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char *p;
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ssize_t t;
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MAP_DBG(map, "copy_from, to=%lX, from=%lX, len=%lX\n",
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(unsigned long)to, from, (unsigned long)len);
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if (from > amap->window_size)
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return;
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p = (char *)to;
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while (len > 0) {
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t = len;
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if ((from < BANK_SIZE) && ((from+len) > BANK_SIZE))
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t = BANK_SIZE-from;
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FLASH_LOCK();
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MAP_DBG(map, "copying %lu byte(s) from %lX to %lX\n",
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(unsigned long)t, (from & (amap->window_size-1)),
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(unsigned long)p);
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adm5120_flash_switchbank(map, from);
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inline_map_copy_from(map, p, (from & (amap->window_size-1)), t);
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FLASH_UNLOCK();
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p += t;
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from += t;
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len -= t;
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}
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}
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static int adm5120_flash_initres(struct adm5120_flash_info *info)
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{
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struct map_info *map = &info->amap.map;
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int err = 0;
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info->res = request_mem_region(map->phys, info->amap.window_size,
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map->name);
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if (info->res == NULL) {
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MAP_ERR(map, "could not reserve memory region\n");
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err = -ENOMEM;
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goto out;
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}
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map->virt = ioremap_nocache(map->phys, info->amap.window_size);
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if (map->virt == NULL) {
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MAP_ERR(map, "failed to ioremap flash region\n");
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err = -ENOMEM;
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goto out;
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}
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out:
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return err;
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}
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static int adm5120_flash_initinfo(struct adm5120_flash_info *info,
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struct platform_device *dev)
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{
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struct map_info *map = &info->amap.map;
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struct adm5120_flash_platform_data *pdata = dev->dev.platform_data;
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struct flash_desc *fdesc;
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u32 t = 0;
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map->name = dev->dev.bus_id;
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if (dev->id > 1) {
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MAP_ERR(map, "invalid flash id\n");
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goto err_out;
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}
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fdesc = &flash_descs[dev->id];
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if (pdata)
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info->amap.window_size = pdata->window_size;
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if (info->amap.window_size == 0) {
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/* get memory window size */
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t = SW_READ_REG(SWITCH_REG_MEMCTRL) >> fdesc->srs_shift;
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t &= MEMCTRL_SRS_MASK;
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info->amap.window_size = flash_sizes[t];
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}
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if (info->amap.window_size == 0) {
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MAP_ERR(map, "unable to determine window size\n");
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goto err_out;
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}
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/* get flash bus width */
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switch (dev->id) {
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case 0:
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t = MPMC_READ_REG(SC1) & SC_MW_MASK;
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break;
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case 1:
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t = MPMC_READ_REG(SC0) & SC_MW_MASK;
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break;
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}
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map->bankwidth = flash_bankwidths[t];
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if (map->bankwidth == 0) {
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MAP_ERR(map, "invalid bus width detected\n");
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goto err_out;
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}
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map->phys = fdesc->phys;
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map->size = BANK_SIZE_MAX;
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simple_map_init(map);
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map->read = adm5120_flash_read;
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map->write = adm5120_flash_write;
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map->copy_from = adm5120_flash_copy_from;
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if (pdata) {
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map->set_vpp = pdata->set_vpp;
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info->amap.switch_bank = pdata->switch_bank;
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}
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info->dev = dev;
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MAP_INFO(map, "probing at 0x%lX, size:%ldKiB, width:%d bits\n",
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(unsigned long)map->phys,
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(unsigned long)info->amap.window_size >> 10,
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map->bankwidth*8);
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return 0;
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err_out:
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return -ENODEV;
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}
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static void adm5120_flash_initbanks(struct adm5120_flash_info *info)
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{
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struct map_info *map = &info->amap.map;
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if (info->mtd->size <= BANK_SIZE)
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/* no bank switching needed */
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return;
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if (info->amap.switch_bank) {
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info->amap.window_size = info->mtd->size;
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return;
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}
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MAP_ERR(map, "reduce visibility from %ldKiB to %ldKiB\n",
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(unsigned long)map->size >> 10,
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(unsigned long)info->mtd->size >> 10);
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info->mtd->size = info->amap.window_size;
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}
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#ifdef CONFIG_MTD_PARTITIONS
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static int adm5120_flash_initparts(struct adm5120_flash_info *info)
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{
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struct adm5120_flash_platform_data *pdata;
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struct map_info *map = &info->amap.map;
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int num_parsers;
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const char *parser[2];
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int err = 0;
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int nr_parts;
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int i;
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info->nr_parts = 0;
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pdata = info->dev->dev.platform_data;
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if (pdata == NULL)
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goto out;
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if (pdata->nr_parts) {
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MAP_INFO(map, "adding static partitions\n");
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err = add_mtd_partitions(info->mtd, pdata->parts,
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pdata->nr_parts);
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if (err == 0) {
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info->nr_parts += pdata->nr_parts;
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goto out;
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}
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}
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num_parsers = ARRAY_SIZE(parse_types);
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if (num_parsers > MAX_PARSED_PARTS)
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num_parsers = MAX_PARSED_PARTS;
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parser[1] = NULL;
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for (i = 0; i < num_parsers; i++) {
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parser[0] = parse_types[i];
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MAP_INFO(map, "parsing \"%s\" partitions\n",
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parser[0]);
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nr_parts = parse_mtd_partitions(info->mtd, parser,
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&info->parts[i], 0);
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if (nr_parts <= 0)
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continue;
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MAP_INFO(map, "adding \"%s\" partitions\n",
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parser[0]);
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err = add_mtd_partitions(info->mtd, info->parts[i], nr_parts);
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if (err)
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break;
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info->nr_parts += nr_parts;
|
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}
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out:
|
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return err;
|
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}
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#else
|
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static int adm5120_flash_initparts(struct adm5120_flash_info *info)
|
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{
|
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return 0;
|
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}
|
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#endif /* CONFIG_MTD_PARTITIONS */
|
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|
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#ifdef CONFIG_MTD_PARTITIONS
|
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static void adm5120_flash_remove_mtd(struct adm5120_flash_info *info)
|
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{
|
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int i;
|
||||
|
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if (info->nr_parts) {
|
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del_mtd_partitions(info->mtd);
|
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for (i = 0; i < MAX_PARSED_PARTS; i++)
|
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if (info->parts[i] != NULL)
|
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kfree(info->parts[i]);
|
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} else {
|
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del_mtd_device(info->mtd);
|
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}
|
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}
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#else
|
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static void adm5120_flash_remove_mtd(struct adm5120_flash_info *info)
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{
|
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del_mtd_device(info->mtd);
|
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}
|
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#endif
|
||||
|
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static int adm5120_flash_remove(struct platform_device *dev)
|
||||
{
|
||||
struct adm5120_flash_info *info;
|
||||
|
||||
info = platform_get_drvdata(dev);
|
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if (info == NULL)
|
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return 0;
|
||||
|
||||
platform_set_drvdata(dev, NULL);
|
||||
|
||||
if (info->mtd != NULL) {
|
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adm5120_flash_remove_mtd(info);
|
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map_destroy(info->mtd);
|
||||
}
|
||||
|
||||
if (info->amap.map.virt != NULL)
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iounmap(info->amap.map.virt);
|
||||
|
||||
if (info->res != NULL) {
|
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release_resource(info->res);
|
||||
kfree(info->res);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int adm5120_flash_probe(struct platform_device *dev)
|
||||
{
|
||||
struct adm5120_flash_info *info;
|
||||
struct map_info *map;
|
||||
const char **probe_type;
|
||||
int err;
|
||||
|
||||
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
||||
if (info == NULL) {
|
||||
err = -ENOMEM;
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
platform_set_drvdata(dev, info);
|
||||
|
||||
err = adm5120_flash_initinfo(info, dev);
|
||||
if (err)
|
||||
goto err_out;
|
||||
|
||||
err = adm5120_flash_initres(info);
|
||||
if (err)
|
||||
goto err_out;
|
||||
|
||||
map = &info->amap.map;
|
||||
for (probe_type = probe_types; info->mtd == NULL && *probe_type != NULL;
|
||||
probe_type++)
|
||||
info->mtd = do_map_probe(*probe_type, map);
|
||||
|
||||
if (info->mtd == NULL) {
|
||||
MAP_ERR(map, "map_probe failed\n");
|
||||
err = -ENXIO;
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
adm5120_flash_initbanks(info);
|
||||
|
||||
if (info->mtd->size < info->amap.window_size) {
|
||||
/* readjust resources */
|
||||
iounmap(map->virt);
|
||||
release_resource(info->res);
|
||||
kfree(info->res);
|
||||
|
||||
info->amap.window_size = info->mtd->size;
|
||||
map->size = info->mtd->size;
|
||||
MAP_INFO(map, "reducing map size to %ldKiB\n",
|
||||
(unsigned long)map->size >> 10);
|
||||
err = adm5120_flash_initres(info);
|
||||
if (err)
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
MAP_INFO(map, "found at 0x%lX, size:%ldKiB, width:%d bits\n",
|
||||
(unsigned long)map->phys, (unsigned long)info->mtd->size >> 10,
|
||||
map->bankwidth*8);
|
||||
|
||||
info->mtd->owner = THIS_MODULE;
|
||||
|
||||
err = adm5120_flash_initparts(info);
|
||||
if (err)
|
||||
goto err_out;
|
||||
|
||||
if (info->nr_parts == 0) {
|
||||
MAP_INFO(map, "no partitions available, registering "
|
||||
"whole flash\n");
|
||||
add_mtd_device(info->mtd);
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_out:
|
||||
adm5120_flash_remove(dev);
|
||||
return err;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int adm5120_flash_suspend(struct platform_device *dev,
|
||||
pm_message_t state)
|
||||
{
|
||||
struct adm5120_flash_info *info = platform_get_drvdata(dev);
|
||||
int ret = 0;
|
||||
|
||||
if (info)
|
||||
ret = info->mtd->suspend(info->mtd);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int adm5120_flash_resume(struct platform_device *dev)
|
||||
{
|
||||
struct adm5120_flash_info *info = platform_get_drvdata(dev);
|
||||
|
||||
if (info)
|
||||
info->mtd->resume(info->mtd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void adm5120_flash_shutdown(struct platform_device *dev)
|
||||
{
|
||||
struct adm5120_flash_info *info = platform_get_drvdata(dev);
|
||||
|
||||
if (info && info->mtd->suspend(info->mtd) == 0)
|
||||
info->mtd->resume(info->mtd);
|
||||
}
|
||||
#endif
|
||||
|
||||
static struct platform_driver adm5120_flash_driver = {
|
||||
.probe = adm5120_flash_probe,
|
||||
.remove = adm5120_flash_remove,
|
||||
#ifdef CONFIG_PM
|
||||
.suspend = adm5120_flash_suspend,
|
||||
.resume = adm5120_flash_resume,
|
||||
.shutdown = adm5120_flash_shutdown,
|
||||
#endif
|
||||
.driver = {
|
||||
.name = DRV_NAME,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init adm5120_flash_init(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = platform_driver_register(&adm5120_flash_driver);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void __exit adm5120_flash_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&adm5120_flash_driver);
|
||||
}
|
||||
|
||||
module_init(adm5120_flash_init);
|
||||
module_exit(adm5120_flash_exit);
|
||||
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
|
||||
MODULE_DESCRIPTION(DRV_DESC);
|
||||
@@ -1,167 +0,0 @@
|
||||
/*
|
||||
* $Id$
|
||||
*
|
||||
* Parse MyLoader-style flash partition tables and produce a Linux partition
|
||||
* array to match.
|
||||
*
|
||||
* Copyright (C) 2007 OpenWrt.org
|
||||
* Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
|
||||
*
|
||||
* This file was based on drivers/mtd/redboot.c
|
||||
* Author: Red Hat, Inc. - David Woodhouse <dwmw2@cambridge.redhat.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License version 2 as published
|
||||
* by the Free Software Foundation.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/vmalloc.h>
|
||||
|
||||
#include <linux/mtd/mtd.h>
|
||||
#include <linux/mtd/partitions.h>
|
||||
|
||||
#include <linux/byteorder/generic.h>
|
||||
|
||||
#include <prom/myloader.h>
|
||||
|
||||
#define NAME_LEN_MAX 20
|
||||
#define NAME_MYLOADER "MyLoader"
|
||||
#define NAME_PARTITION_TABLE "Partition Table"
|
||||
#define BLOCK_LEN_MIN 0x10000
|
||||
|
||||
int parse_myloader_partitions(struct mtd_info *master,
|
||||
struct mtd_partition **pparts,
|
||||
unsigned long origin)
|
||||
{
|
||||
struct mylo_partition_table *tab;
|
||||
struct mylo_partition *part;
|
||||
struct mtd_partition *mtd_parts;
|
||||
struct mtd_partition *mtd_part;
|
||||
int num_parts;
|
||||
int ret, i;
|
||||
size_t retlen;
|
||||
char *names;
|
||||
unsigned long offset;
|
||||
unsigned long blocklen;
|
||||
|
||||
tab = vmalloc(sizeof(*tab));
|
||||
if (!tab) {
|
||||
return -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
blocklen = master->erasesize;
|
||||
if (blocklen < BLOCK_LEN_MIN)
|
||||
blocklen = BLOCK_LEN_MIN;
|
||||
|
||||
/* Partition Table is always located on the second erase block */
|
||||
offset = blocklen;
|
||||
printk(KERN_NOTICE "%s: searching for MyLoader partition table at "
|
||||
"offset 0x%lx\n", master->name, offset);
|
||||
|
||||
ret = master->read(master, offset, sizeof(*tab), &retlen, (void *)tab);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
if (retlen != sizeof(*tab)) {
|
||||
ret = -EIO;
|
||||
goto out_free_buf;
|
||||
}
|
||||
|
||||
/* Check for Partition Table magic number */
|
||||
if (tab->magic != le32_to_cpu(MYLO_MAGIC_PARTITIONS)) {
|
||||
printk(KERN_NOTICE "%s: no MyLoader partition table found\n",
|
||||
master->name);
|
||||
ret = 0;
|
||||
goto out_free_buf;
|
||||
}
|
||||
|
||||
/* The MyLoader and the Partition Table is always present */
|
||||
num_parts = 2;
|
||||
|
||||
/* Detect number of used partitions */
|
||||
for (i = 0; i < MYLO_MAX_PARTITIONS; i++) {
|
||||
part = &tab->partitions[i];
|
||||
|
||||
if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE)
|
||||
continue;
|
||||
|
||||
num_parts++;
|
||||
}
|
||||
|
||||
mtd_parts = kzalloc((num_parts * sizeof(*mtd_part) +
|
||||
num_parts * NAME_LEN_MAX), GFP_KERNEL);
|
||||
|
||||
if (!mtd_parts) {
|
||||
ret = -ENOMEM;
|
||||
goto out_free_buf;
|
||||
}
|
||||
|
||||
mtd_part = mtd_parts;
|
||||
names = (char *)&mtd_parts[num_parts];
|
||||
|
||||
strncpy(names, NAME_MYLOADER, NAME_LEN_MAX-1);
|
||||
mtd_part->name = names;
|
||||
mtd_part->offset = 0;
|
||||
mtd_part->size = blocklen;
|
||||
mtd_part->mask_flags = MTD_WRITEABLE;
|
||||
mtd_part++;
|
||||
names += NAME_LEN_MAX;
|
||||
|
||||
strncpy(names, NAME_PARTITION_TABLE, NAME_LEN_MAX-1);
|
||||
mtd_part->name = names;
|
||||
mtd_part->offset = blocklen;
|
||||
mtd_part->size = blocklen;
|
||||
mtd_part->mask_flags = MTD_WRITEABLE;
|
||||
mtd_part++;
|
||||
names += NAME_LEN_MAX;
|
||||
|
||||
for (i = 0; i < MYLO_MAX_PARTITIONS; i++) {
|
||||
part = &tab->partitions[i];
|
||||
|
||||
if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE)
|
||||
continue;
|
||||
|
||||
sprintf(names, "partition%d", i);
|
||||
mtd_part->offset = le32_to_cpu(part->addr);
|
||||
mtd_part->size = le32_to_cpu(part->size);
|
||||
mtd_part->name = names;
|
||||
mtd_part++;
|
||||
names += NAME_LEN_MAX;
|
||||
}
|
||||
|
||||
*pparts = mtd_parts;
|
||||
ret = num_parts;
|
||||
|
||||
out_free_buf:
|
||||
vfree(tab);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct mtd_part_parser mylo_mtd_parser = {
|
||||
.owner = THIS_MODULE,
|
||||
.parse_fn = parse_myloader_partitions,
|
||||
.name = NAME_MYLOADER,
|
||||
};
|
||||
|
||||
static int __init mylo_mtd_parser_init(void)
|
||||
{
|
||||
return register_mtd_parser(&mylo_mtd_parser);
|
||||
}
|
||||
|
||||
static void __exit mylo_mtd_parser_exit(void)
|
||||
{
|
||||
deregister_mtd_parser(&mylo_mtd_parser);
|
||||
}
|
||||
|
||||
module_init(mylo_mtd_parser_init);
|
||||
module_exit(mylo_mtd_parser_exit);
|
||||
|
||||
MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
|
||||
MODULE_DESCRIPTION("Parsing code for MyLoader partition tables");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
@@ -1,220 +0,0 @@
|
||||
/*
|
||||
* $Id$
|
||||
*
|
||||
* Copyright (C) 2007 OpenWrt.org
|
||||
* Copyright (C) Gabor Juhos <juhosg at 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 2 as published
|
||||
* by the Free Software Foundation.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/kmod.h>
|
||||
#include <linux/root_dev.h>
|
||||
|
||||
#include <linux/mtd/mtd.h>
|
||||
#include <linux/mtd/partitions.h>
|
||||
|
||||
#include <linux/byteorder/generic.h>
|
||||
|
||||
#define PFX "trxsplit: "
|
||||
|
||||
#define TRX_MAGIC 0x30524448 /* "HDR0" */
|
||||
#define TRX_VERSION 1
|
||||
#define TRX_MAX_LEN 0x3A0000
|
||||
#define TRX_NO_HEADER 0x1 /* do not write TRX header */
|
||||
#define TRX_GZ_FILES 0x2 /* contains individual gzip files */
|
||||
#define TRX_MAX_OFFSET 3
|
||||
#define TRX_MIN_KERNEL_SIZE 256*1024
|
||||
|
||||
struct trx_header {
|
||||
u32 magic; /* "HDR0" */
|
||||
u32 len; /* Length of file including header */
|
||||
u32 crc32; /* 32-bit CRC from flag_version to end of file */
|
||||
u32 flag_version; /* 0:15 flags, 16:31 version */
|
||||
u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions */
|
||||
};
|
||||
|
||||
#define TRX_ALIGN 0x1000
|
||||
|
||||
static int trx_nr_parts;
|
||||
static unsigned long trx_offset;
|
||||
static struct mtd_info *trx_mtd;
|
||||
static struct mtd_partition trx_parts[TRX_MAX_OFFSET];
|
||||
static struct trx_header trx_hdr;
|
||||
|
||||
static int trxsplit_refresh_partitions(struct mtd_info *mtd);
|
||||
|
||||
static int trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
|
||||
{
|
||||
size_t retlen;
|
||||
int err;
|
||||
|
||||
err = mtd->read(mtd, offset, sizeof(trx_hdr), &retlen,
|
||||
(void *)&trx_hdr);
|
||||
if (err) {
|
||||
printk(KERN_ALERT PFX "unable to read from '%s'\n", mtd->name);
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
if (retlen != sizeof(trx_hdr)) {
|
||||
printk(KERN_ALERT PFX "reading failed on '%s'\n", mtd->name);
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
trx_hdr.magic = le32_to_cpu(trx_hdr.magic);
|
||||
trx_hdr.len = le32_to_cpu(trx_hdr.len);
|
||||
trx_hdr.crc32 = le32_to_cpu(trx_hdr.crc32);
|
||||
trx_hdr.flag_version = le32_to_cpu(trx_hdr.flag_version);
|
||||
trx_hdr.offsets[0] = le32_to_cpu(trx_hdr.offsets[0]);
|
||||
trx_hdr.offsets[1] = le32_to_cpu(trx_hdr.offsets[1]);
|
||||
trx_hdr.offsets[2] = le32_to_cpu(trx_hdr.offsets[2]);
|
||||
|
||||
/* sanity checks */
|
||||
if (trx_hdr.magic != TRX_MAGIC)
|
||||
goto err_out;
|
||||
|
||||
if (trx_hdr.len > mtd->size - offset)
|
||||
goto err_out;
|
||||
|
||||
/* TODO: add crc32 checking too? */
|
||||
|
||||
return 0;
|
||||
|
||||
err_out:
|
||||
return -1;
|
||||
}
|
||||
|
||||
static void trxsplit_findtrx(struct mtd_info *mtd)
|
||||
{
|
||||
unsigned long offset;
|
||||
int err;
|
||||
|
||||
printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name);
|
||||
|
||||
err = 0;
|
||||
for (offset = 0; offset < mtd->size; offset += TRX_ALIGN) {
|
||||
err = trxsplit_checktrx(mtd, offset);
|
||||
if (err == 0)
|
||||
break;
|
||||
}
|
||||
|
||||
if (err)
|
||||
return;
|
||||
|
||||
printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset);
|
||||
|
||||
trx_mtd = mtd;
|
||||
trx_offset = offset;
|
||||
}
|
||||
|
||||
static void trxsplit_create_partitions(struct mtd_info *mtd)
|
||||
{
|
||||
struct mtd_partition *part = trx_parts;
|
||||
int err;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < TRX_MAX_OFFSET; i++) {
|
||||
part = &trx_parts[i];
|
||||
if (trx_hdr.offsets[i] == 0)
|
||||
continue;
|
||||
part->offset = trx_offset + trx_hdr.offsets[i];
|
||||
trx_nr_parts++;
|
||||
}
|
||||
|
||||
for (i = 0; i < trx_nr_parts-1; i++)
|
||||
trx_parts[i].size = trx_parts[i+1].offset - trx_parts[i].offset;
|
||||
|
||||
trx_parts[i].size = mtd->size - trx_parts[i].offset;
|
||||
|
||||
i = 0;
|
||||
part = &trx_parts[i];
|
||||
if (part->size < TRX_MIN_KERNEL_SIZE) {
|
||||
part->name = "loader";
|
||||
i++;
|
||||
}
|
||||
|
||||
part = &trx_parts[i];
|
||||
part->name = "kernel";
|
||||
i++;
|
||||
|
||||
part = &trx_parts[i];
|
||||
part->name = "rootfs";
|
||||
|
||||
err = add_mtd_partitions(mtd, trx_parts, trx_nr_parts);
|
||||
if (err) {
|
||||
printk(KERN_ALERT PFX "adding TRX partitions failed\n");
|
||||
return;
|
||||
}
|
||||
|
||||
mtd->refresh_device = trxsplit_refresh_partitions;
|
||||
}
|
||||
|
||||
static int trxsplit_refresh_partitions(struct mtd_info *mtd)
|
||||
{
|
||||
printk(KERN_INFO PFX "refreshing TRX partitions in '%s' (%d,%d)\n",
|
||||
mtd->name, MTD_BLOCK_MAJOR, mtd->index);
|
||||
|
||||
/* remove old partitions */
|
||||
del_mtd_partitions(mtd);
|
||||
|
||||
trxsplit_findtrx(mtd);
|
||||
if (!trx_mtd)
|
||||
goto err;
|
||||
|
||||
trxsplit_create_partitions(trx_mtd);
|
||||
return 1;
|
||||
|
||||
err:
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __init trxsplit_add_mtd(struct mtd_info *mtd)
|
||||
{
|
||||
if (mtd->type != MTD_NORFLASH) {
|
||||
printk(KERN_INFO PFX "'%s' is not a NOR flash, skipped\n",
|
||||
mtd->name);
|
||||
return;
|
||||
}
|
||||
|
||||
if (!trx_mtd)
|
||||
trxsplit_findtrx(mtd);
|
||||
}
|
||||
|
||||
static void __init trxsplit_remove_mtd(struct mtd_info *mtd)
|
||||
{
|
||||
/* nothing to do */
|
||||
}
|
||||
|
||||
static struct mtd_notifier trxsplit_notifier __initdata = {
|
||||
.add = trxsplit_add_mtd,
|
||||
.remove = trxsplit_remove_mtd,
|
||||
};
|
||||
|
||||
static void __init trxsplit_scan(void)
|
||||
{
|
||||
register_mtd_user(&trxsplit_notifier);
|
||||
unregister_mtd_user(&trxsplit_notifier);
|
||||
}
|
||||
|
||||
static int __init trxsplit_init(void)
|
||||
{
|
||||
trxsplit_scan();
|
||||
|
||||
if (trx_mtd) {
|
||||
printk(KERN_INFO PFX "creating TRX partitions in '%s' "
|
||||
"(%d,%d)\n", trx_mtd->name, MTD_BLOCK_MAJOR,
|
||||
trx_mtd->index);
|
||||
trxsplit_create_partitions(trx_mtd);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
late_initcall(trxsplit_init);
|
||||
Reference in New Issue
Block a user