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/*
* Flash mapping for rtl8196 board
*
* Copyright (C) 2008 Realtek Corporation
*
*/
#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/root_dev.h>
#include <linux/mtd/partitions.h>
#include <linux/config.h>
#include <linux/delay.h>
#include <linux/autoconf.h>
#ifdef CONFIG_MTD_CONCAT
#include <linux/mtd/concat.h>
#endif
#define WINDOW_ADDR 0xbfe00000
#ifdef CONFIG_SPANSION_16M_FLASH
#define WINDOW_SIZE 0x1000000
#define FLASH_BANK_SIZE 0x400000
#else
#define WINDOW_SIZE 0x400000
#endif
#define BUSWIDTH 2
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
#define MAX_SPI_CS 2 /* Number of CS we are going to test */
#else
#define MAX_SPI_CS 1
#endif
static struct mtd_info *rtl8196_mtd;
__u8 rtl8196_map_read8(struct map_info *map, unsigned long ofs)
{
//printk("enter %s %d\n",__FILE__,__LINE__);
return __raw_readb(map->map_priv_1 + ofs);
}
__u16 rtl8196_map_read16(struct map_info *map, unsigned long ofs)
{
//printk("enter %s %d\n",__FILE__,__LINE__);
return __raw_readw(map->map_priv_1 + ofs);
}
__u32 rtl8196_map_read32(struct map_info *map, unsigned long ofs)
{
//printk("enter %s %d\n",__FILE__,__LINE__);
return __raw_readl(map->map_priv_1 + ofs);
}
void rtl8196_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
//printk("enter to %x from %x len %d\n",to, map->map_priv_1+from , len);
//11/15/05' hrchen, change the size to fit file systems block size if use different fs
//4096 for cramfs, 1024 for squashfs
if (from>0x10000)
memcpy(to, map->map_priv_1 + from, (len<=1024)?len:1024);//len);
else
memcpy(to, map->map_priv_1 + from, (len<=4096)?len:4096);//len);
//printk("enter %s %d\n", __FILE__,__LINE__);
}
void rtl8196_map_write8(struct map_info *map, __u8 d, unsigned long adr)
{
__raw_writeb(d, map->map_priv_1 + adr);
mb();
}
void rtl8196_map_write16(struct map_info *map, __u16 d, unsigned long adr)
{
__raw_writew(d, map->map_priv_1 + adr);
mb();
}
void rtl8196_map_write32(struct map_info *map, __u32 d, unsigned long adr)
{
__raw_writel(d, map->map_priv_1 + adr);
mb();
}
void rtl8196_map_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
{
//printk("enter %s %d\n",__FILE__,__LINE__);
memcpy_toio(map->map_priv_1 + to, from, len);
}
static struct map_info spi_map[MAX_SPI_CS] = {
{
name: "flash_bank_1",
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
size: CONFIG_RTL_SPI_FLASH1_SIZE,
#else
size: WINDOW_SIZE,
#endif
phys: 0xbd000000,
virt: 0xbd000000,
bankwidth: BUSWIDTH
},
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
{
name: "flash_bank_2",
size: CONFIG_RTL_SPI_FLASH2_SIZE,
phys: 0xbe000000,
virt: 0xbe000000,
bankwidth: BUSWIDTH
}
#endif
};
static struct mtd_info *my_sub_mtd[MAX_SPI_CS] = {
NULL,
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
NULL
#endif
};
static struct mtd_info *mymtd;
/////////////////////////////////////////////////////////////////////////////
#ifdef CONFIG_RTL_FLASH_MAPPING_ENABLE
#if defined( CONFIG_ROOTFS_JFFS2 )
static struct mtd_partition rtl8196_parts1[] = {
{
name: "boot+cfg",
size: (CONFIG_RTL_LINUX_IMAGE_OFFSET-0),
offset: 0x00000000,
},
{
name: "jffs2(linux+root fs)",
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
#ifdef CONFIG_MTD_CONCAT
size: (CONFIG_RTL_SPI_FLASH1_SIZE+CONFIG_RTL_SPI_FLASH2_SIZE-CONFIG_RTL_ROOT_IMAGE_OFFSET),
#else
size: (CONFIG_RTL_SPI_FLASH1_SIZE-CONFIG_RTL_ROOT_IMAGE_OFFSET),
#endif
#else
size: (WINDOW_SIZE - CONFIG_RTL_ROOT_IMAGE_OFFSET),
#endif
offset: (CONFIG_RTL_ROOT_IMAGE_OFFSET),
}
};
#elif defined( CONFIG_ROOTFS_RAMFS )
static struct mtd_partition rtl8196_parts1[] = {
{
name: "boot+cfg+linux+rootfs",
size: (CONFIG_RTL_FLASH_SIZE-0),
offset: 0x00000000,
},
};
#elif defined( CONFIG_ROOTFS_SQUASH )
#ifndef CONFIG_RTL_FLASH_DUAL_IMAGE_ENABLE
static struct mtd_partition rtl8196_parts1[] = {
{
name: "boot+cfg",
size: (CONFIG_RTL_LINUX_IMAGE_OFFSET - 0),
offset: 0x00000000,
},
{
name: "kernel",
size: (CONFIG_RTL_ROOT_IMAGE_OFFSET - CONFIG_RTL_LINUX_IMAGE_OFFSET),
offset: CONFIG_RTL_LINUX_IMAGE_OFFSET,
},
{
name: "rootfs",
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
#ifdef CONFIG_MTD_CONCAT
size: (CONFIG_RTL_SPI_FLASH1_SIZE + CONFIG_RTL_SPI_FLASH2_SIZE - CONFIG_RTL_ROOT_IMAGE_OFFSET),
#else
size: (CONFIG_RTL_SPI_FLASH1_SIZE - CONFIG_RTL_ROOT_IMAGE_OFFSET),
#endif
#else
size: (CONFIG_RTL_FLASH_SIZE - CONFIG_RTL_ROOT_IMAGE_OFFSET),
#endif
offset: CONFIG_RTL_ROOT_IMAGE_OFFSET,
},
{
name: "firmware",
size: (CONFIG_RTL_FLASH_SIZE - CONFIG_RTL_LINUX_IMAGE_OFFSET),
offset: CONFIG_RTL_LINUX_IMAGE_OFFSET,
},
};
#else //!CONFIG_RTL_FLASH_DUAL_IMAGE_ENABLE
static struct mtd_partition rtl8196_parts1[] = {
{
name: "boot+cfg+linux(bank1)",
size: (CONFIG_RTL_ROOT_IMAGE_OFFSET-0),
offset: 0x00000000,
},
{
name: "root fs(bank1)",
size: (CONFIG_RTL_FLASH_SIZE-CONFIG_RTL_ROOT_IMAGE_OFFSET),
offset: (CONFIG_RTL_ROOT_IMAGE_OFFSET),
},
{
name: "inux(bank2)",
size: (CONFIG_RTL_ROOT_IMAGE_OFFSET-0),
offset: CONFIG_RTL_FLASH_DUAL_IMAGE_OFFSET,
},
{
name: "root fs(bank2)",
size: (CONFIG_RTL_FLASH_SIZE-CONFIG_RTL_ROOT_IMAGE_OFFSET),
offset: CONFIG_RTL_FLASH_DUAL_IMAGE_OFFSET+(CONFIG_RTL_ROOT_IMAGE_OFFSET),
}
};
#endif //CONFIG_RTL_FLASH_DUAL_IMAGE_ENABLE
#else
#error "unknow flash filesystem type"
#endif
#else // !CONFIG_RTL_FLASH_MAPPING_ENABLE
static struct mtd_partition rtl8196_parts1[] = {
{
name: "boot+cfg+linux",
size: 0x00130000,
offset:0x00000000,
},
{
name: "root fs",
size: 0x002D0000,
offset: 0x00130000,
}
};
#endif
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
static struct mtd_partition rtl8196_parts2[] = {
{
name: "data",
size: CONFIG_RTL_SPI_FLASH2_SIZE,
offset: 0x00000000,
}
};
#endif
#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
#define init_rtl8196_map init_module
#define cleanup_rtl8196_map cleanup_module
#endif
#define mod_init_t static int __init
#define mod_exit_t static void __exit
mod_init_t init_rtl8196_map(void)
{
int i,chips;
#ifdef SIZE_REMAINING
struct mtd_partition *last_partition;
#endif
chips = 0;
for (i=0;i<MAX_SPI_CS;i++) {
simple_map_init(&spi_map[i]);
my_sub_mtd[i] = do_map_probe(spi_map[i].name, &spi_map[i]);
if (my_sub_mtd[i]) {
my_sub_mtd[i]->owner = THIS_MODULE;
chips++;
//printk("%s, %d, i=%d, chips=%d\n", __FUNCTION__, __LINE__, i, chips);
}
}
#ifdef CONFIG_MTD_CONCAT
if (chips == 1)
mymtd = my_sub_mtd[0];
else
{
//printk("%s, %d\n, size=0x%x\n", __FUNCTION__, __LINE__, my_sub_mtd[0]->size);
mymtd = mtd_concat_create(&my_sub_mtd[0], chips,"flash_concat");
//printk("%s, %d, size=0x%x\n", __FUNCTION__, __LINE__, (mymtd->size));
}
if (!mymtd) {
printk("Cannot create flash concat device\n");
return -ENXIO;
}
#endif
#ifdef SIZE_REMAINING
#ifdef CONFIG_MTD_CONCAT
last_partition = &rtl8196_parts1[ ARRAY_SIZE(rtl8196_parts1) - 1 ];
if( last_partition->size == SIZE_REMAINING ) {
if( last_partition->offset > mymtd->size ) {
printk( "Warning: partition offset larger than mtd size\n" );
}else{
last_partition->size = mymtd->size - last_partition->offset;
}
#ifdef DEBUG_MAP
printk(KERN_NOTICE "last_partition size: 0x%x\n",last_partition->size );
#endif
}
#else
//for (i=0;i<chips;i++)
{
last_partition = &rtl8196_parts1[ ARRAY_SIZE(rtl8196_parts1) - 1 ];
if( last_partition->size == SIZE_REMAINING ) {
if( last_partition->offset > my_sub_mtd[0]->size ) {
printk( "Warning: partition offset larger than mtd size\n" );
}else{
last_partition->size = my_sub_mtd[0]->size - last_partition->offset;
}
#ifdef DEBUG_MAP
printk(KERN_NOTICE "last_partition size: 0x%x\n",last_partition->size );
#endif
}
last_partition = &rtl8196_parts2[ ARRAY_SIZE(rtl8196_parts2) - 1 ];
if( last_partition->size == SIZE_REMAINING ) {
if( last_partition->offset > my_sub_mtd[1]->size ) {
printk( "Warning: partition offset larger than mtd size\n" );
}else{
last_partition->size = my_sub_mtd[1]->size - last_partition->offset;
}
#ifdef DEBUG_MAP
printk(KERN_NOTICE "last_partition size: 0x%x\n",last_partition->size );
#endif
}
}
#endif
#endif
#ifdef CONFIG_MTD_CONCAT
add_mtd_partitions(mymtd, rtl8196_parts1, ARRAY_SIZE(rtl8196_parts1));
#ifdef DEBUG_MAP
printk(KERN_NOTICE "name=%s, size=0x%x\n", mymtd->name, mymtd->size);
#endif
#else
if (my_sub_mtd[0]) {
add_mtd_partitions(my_sub_mtd[0], rtl8196_parts1,
ARRAY_SIZE(rtl8196_parts1));
#ifdef DEBUG_MAP
printk(KERN_NOTICE "name=%s, size=0x%x\n", my_sub_mtd[0]->name,
my_sub_mtd[0]->size);
#endif
}
#ifdef CONFIG_RTL_TWO_SPI_FLASH_ENABLE
if (my_sub_mtd[1]) {
add_mtd_partitions(my_sub_mtd[1], rtl8196_parts2,
ARRAY_SIZE(rtl8196_parts2));
#ifdef DEBUG_MAP
printk(KERN_NOTICE "name=%s, size=0x%x\n", my_sub_mtd[1]->name,
my_sub_mtd[1]->size);
#endif
}
#endif
#endif
ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, 0);
return 0;
}
mod_exit_t cleanup_rtl8196_map(void)
{
int i;
if (mymtd) {
del_mtd_partitions(mymtd);
map_destroy(mymtd);
}
for(i=0; i<MAX_SPI_CS; i++)
{
if (my_sub_mtd[i])
{
del_mtd_partitions(my_sub_mtd[i]);
map_destroy(my_sub_mtd[i]);
}
}
}
MODULE_LICENSE("GPL");
module_init(init_rtl8196_map);
module_exit(cleanup_rtl8196_map);
|
