e733450b67
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
167 lines
4.1 KiB
C
167 lines
4.1 KiB
C
/*
|
|
* Flash memory access on AMD Alchemy evaluation boards
|
|
*
|
|
* (C) 2003, 2004 Pete Popov <ppopov@embeddedalley.com>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#ifdef CONFIG_MIPS_PB1000
|
|
#define BOARD_MAP_NAME "Pb1000 Flash"
|
|
#define BOARD_FLASH_SIZE 0x00800000 /* 8MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_PB1500
|
|
#define BOARD_MAP_NAME "Pb1500 Flash"
|
|
#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_PB1100
|
|
#define BOARD_MAP_NAME "Pb1100 Flash"
|
|
#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_PB1550
|
|
#define BOARD_MAP_NAME "Pb1550 Flash"
|
|
#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_PB1200
|
|
#define BOARD_MAP_NAME "Pb1200 Flash"
|
|
#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
|
|
#define BOARD_FLASH_WIDTH 2 /* 16-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_DB1000
|
|
#define BOARD_MAP_NAME "Db1000 Flash"
|
|
#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_DB1500
|
|
#define BOARD_MAP_NAME "Db1500 Flash"
|
|
#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_DB1100
|
|
#define BOARD_MAP_NAME "Db1100 Flash"
|
|
#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_DB1550
|
|
#define BOARD_MAP_NAME "Db1550 Flash"
|
|
#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_DB1200
|
|
#define BOARD_MAP_NAME "Db1200 Flash"
|
|
#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
|
|
#define BOARD_FLASH_WIDTH 2 /* 16-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_BOSPORUS
|
|
#define BOARD_MAP_NAME "Bosporus Flash"
|
|
#define BOARD_FLASH_SIZE 0x01000000 /* 16MB */
|
|
#define BOARD_FLASH_WIDTH 2 /* 16-bits */
|
|
#endif
|
|
|
|
#ifdef CONFIG_MIPS_MIRAGE
|
|
#define BOARD_MAP_NAME "Mirage Flash"
|
|
#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
|
|
#define BOARD_FLASH_WIDTH 4 /* 32-bits */
|
|
#define USE_LOCAL_ACCESSORS /* why? */
|
|
#endif
|
|
|
|
static struct map_info alchemy_map = {
|
|
.name = BOARD_MAP_NAME,
|
|
};
|
|
|
|
static struct mtd_partition alchemy_partitions[] = {
|
|
{
|
|
.name = "User FS",
|
|
.size = BOARD_FLASH_SIZE - 0x00400000,
|
|
.offset = 0x0000000
|
|
},{
|
|
.name = "YAMON",
|
|
.size = 0x0100000,
|
|
.offset = MTDPART_OFS_APPEND,
|
|
.mask_flags = MTD_WRITEABLE
|
|
},{
|
|
.name = "raw kernel",
|
|
.size = (0x300000 - 0x40000), /* last 256KB is yamon env */
|
|
.offset = MTDPART_OFS_APPEND,
|
|
}
|
|
};
|
|
|
|
static struct mtd_info *mymtd;
|
|
|
|
int __init alchemy_mtd_init(void)
|
|
{
|
|
struct mtd_partition *parts;
|
|
int nb_parts = 0;
|
|
unsigned long window_addr;
|
|
unsigned long window_size;
|
|
|
|
/* Default flash buswidth */
|
|
alchemy_map.bankwidth = BOARD_FLASH_WIDTH;
|
|
|
|
window_addr = 0x20000000 - BOARD_FLASH_SIZE;
|
|
window_size = BOARD_FLASH_SIZE;
|
|
|
|
/*
|
|
* Static partition definition selection
|
|
*/
|
|
parts = alchemy_partitions;
|
|
nb_parts = ARRAY_SIZE(alchemy_partitions);
|
|
alchemy_map.size = window_size;
|
|
|
|
/*
|
|
* Now let's probe for the actual flash. Do it here since
|
|
* specific machine settings might have been set above.
|
|
*/
|
|
printk(KERN_NOTICE BOARD_MAP_NAME ": probing %d-bit flash bus\n",
|
|
alchemy_map.bankwidth*8);
|
|
alchemy_map.virt = ioremap(window_addr, window_size);
|
|
mymtd = do_map_probe("cfi_probe", &alchemy_map);
|
|
if (!mymtd) {
|
|
iounmap(alchemy_map.virt);
|
|
return -ENXIO;
|
|
}
|
|
mymtd->owner = THIS_MODULE;
|
|
|
|
add_mtd_partitions(mymtd, parts, nb_parts);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alchemy_mtd_cleanup(void)
|
|
{
|
|
if (mymtd) {
|
|
del_mtd_partitions(mymtd);
|
|
map_destroy(mymtd);
|
|
iounmap(alchemy_map.virt);
|
|
}
|
|
}
|
|
|
|
module_init(alchemy_mtd_init);
|
|
module_exit(alchemy_mtd_cleanup);
|
|
|
|
MODULE_AUTHOR("Embedded Alley Solutions, Inc");
|
|
MODULE_DESCRIPTION(BOARD_MAP_NAME " MTD driver");
|
|
MODULE_LICENSE("GPL");
|