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/*
*
* 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/mtd/partitions.h>
#include <linux/config.h>
#define WINDOW_ADDR 0xffe00000
#define WINDOW_SIZE 0x200000
#define BUSWIDTH 2
extern char* ppcboot_getenv(char* v);
static struct mtd_info *mymtd;
__u8 m5272c3_read8(struct map_info *map, unsigned long ofs)
{
return __raw_readb(map->map_priv_1 + ofs);
}
__u16 m5272c3_read16(struct map_info *map, unsigned long ofs)
{
return __raw_readw(map->map_priv_1 + ofs);
}
__u32 m5272c3_read32(struct map_info *map, unsigned long ofs)
{
return __raw_readl(map->map_priv_1 + ofs);
}
void m5272c3_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
memcpy_fromio(to, map->map_priv_1 + from, len);
}
void m5272c3_write8(struct map_info *map, __u8 d, unsigned long adr)
{
__raw_writeb(d, map->map_priv_1 + adr);
mb();
}
void m5272c3_write16(struct map_info *map, __u16 d, unsigned long adr)
{
__raw_writew(d, map->map_priv_1 + adr);
mb();
}
void m5272c3_write32(struct map_info *map, __u32 d, unsigned long adr)
{
__raw_writel(d, map->map_priv_1 + adr);
mb();
}
void m5272c3_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 m5272c3_map = {
name: "MCF5272C3 flash device",
size: WINDOW_SIZE,
buswidth: BUSWIDTH,
read8: m5272c3_read8,
read16: m5272c3_read16,
read32: m5272c3_read32,
copy_from: m5272c3_copy_from,
write8: m5272c3_write8,
write16: m5272c3_write16,
write32: m5272c3_write32,
copy_to: m5272c3_copy_to
};
/*
* MTD 'PARTITIONING' STUFF
*/
#ifndef CONFIG_PPCBOOT
static struct mtd_partition m5272c3_partitions[] = {
{
name: "kernel (768K)",
size: 0xc0000,
offset: 0x40000
},
{
name: "rootfs (1024K)",
size: 0x100000,
offset: 0x100000
},
{
name: "environment (8K)",
size: 0x2000,
offset: 0x4000
}
};
#else
#define M5272C3_MAX_PARTITIONS 8
#define M5272C3_MAX_PARTARGENTRIES 3
#define M5272C3_PTABLE_BUFSIZE 256
static struct mtd_partition m5272c3_partitions[M5272C3_MAX_PARTITIONS];
static int m5272c3_partitions_cnt=0;
static char* m5272c3_emptyentry = "";
static void read_m5272c3_partitiontable(void) {
char* envptable=ppcboot_getenv("ptable");
if(envptable) {
char ptable[M5272C3_PTABLE_BUFSIZE],*p,*pt;
int pcnt,acnt,i;
char *ptableargentry[M5272C3_MAX_PARTITIONS][M5272C3_MAX_PARTARGENTRIES];
strncpy(ptable,envptable,M5272C3_PTABLE_BUFSIZE-1);
ptable[M5272C3_PTABLE_BUFSIZE-1]=0;
for(pcnt=0;pcnt<M5272C3_MAX_PARTITIONS;pcnt++) {
for(acnt=0;acnt<M5272C3_MAX_PARTARGENTRIES;acnt++) {
ptableargentry[pcnt][acnt]=m5272c3_emptyentry;
};
};
pcnt=acnt=0;
p=pt=ptable;
while(1) {
if((*p == ',') || (*p == ':') || (*p == 0)) {
if(pcnt<M5272C3_MAX_PARTITIONS) {
if(acnt<M5272C3_MAX_PARTARGENTRIES)
ptableargentry[pcnt][acnt++]=pt;
if((*p == ':') || ( *p == 0 ))
{ acnt=0; pcnt++; };
if( *p == 0 )
break;
pt=p+1;
};
*p=0;
};
p++;
};
for(i=0;i<pcnt;i++) {
m5272c3_partitions[i].name=
(char*)kmalloc(strlen(ptableargentry[i][0])+1,GFP_KERNEL);
strcpy(m5272c3_partitions[i].name,ptableargentry[i][0]);
m5272c3_partitions[i].size=
simple_strtoul(ptableargentry[i][1],0,16)*0x1000;
m5272c3_partitions[i].offset=
simple_strtoul(ptableargentry[i][2],0,16)*0x1000;
};
m5272c3_partitions_cnt=pcnt;
};
};
#endif
#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
#define init_m5272c3 init_module
#define cleanup_m5272c3 cleanup_module
#endif
int __init init_m5272c3(void)
{
printk(KERN_NOTICE "m5272c3 flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
m5272c3_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
if (!m5272c3_map.map_priv_1) {
printk("Failed to ioremap\n");
return -EIO;
}
mymtd = do_map_probe("cfi_probe", &m5272c3_map);
if (mymtd) {
mymtd->module = THIS_MODULE;
#ifdef CONFIG_PPCBOOT
read_m5272c3_partitiontable();
if(m5272c3_partitions_cnt) {
return add_mtd_partitions(mymtd, m5272c3_partitions, m5272c3_partitions_cnt);
}
else {
return -ENXIO;
};
#else
return add_mtd_partitions(mymtd, m5272c3_partitions,
sizeof(m5272c3_partitions) /
sizeof(struct mtd_partition));
#endif
}
iounmap((void *)m5272c3_map.map_priv_1);
return -ENXIO;
}
static void __exit cleanup_m5272c3(void)
{
if (mymtd) {
del_mtd_partitions(mymtd);
map_destroy(mymtd);
}
if (m5272c3_map.map_priv_1) {
iounmap((void *)m5272c3_map.map_priv_1);
m5272c3_map.map_priv_1 = 0;
}
}
module_init(init_m5272c3);
module_exit(cleanup_m5272c3);
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