/* * Flash memory access on Alchemy Pb1xxx boards *  * (C) 2001 Pete Popov <ppopov@mvista.com> *  * $Id: pb1xxx-flash.c,v 1.2 2007/09/21 03:09:24 quy Exp $ */#include <linux/config.h>#include <linux/module.h>#include <linux/types.h>#include <linux/init.h>#include <linux/kernel.h>#include <linux/mtd/mtd.h>#include <linux/mtd/map.h>#include <linux/mtd/partitions.h>#include <asm/io.h>#include <asm/au1000.h>#ifdef 	DEBUG_RW#define	DBG(x...)	printk(x)#else#define	DBG(x...)	#endif#ifdef CONFIG_MIPS_PB1000#define WINDOW_ADDR 0x1F800000#define WINDOW_SIZE 0x800000static struct mtd_partition pb1xxx_partitions[] = {        {                .name         =  "yamon env",                .size         =   0x00020000,                .offset       =   0,                .mask_flags   =   MTD_WRITEABLE},	{                .name         =   "User FS",                .size         =   0x003e0000,                .offset       =   0x20000,},	{                .name         =   "boot code",                .size         =   0x100000,                .offset       =   0x400000,                .mask_flags   =   MTD_WRITEABLE},	{                .name         =   "raw/kernel",                .size         =   0x300000,                .offset       =   0x500000}};#elif defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_PB1100)#if defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)/* both 32MB banks will be used. Combine the first 32MB bank and the * first 28MB of the second bank together into a single jffs/jffs2 * partition. */#define WINDOW_ADDR 0x1C000000#define WINDOW_SIZE 0x4000000static struct mtd_partition pb1xxx_partitions[] = {        {                .name         =   "User FS",                .size         =   0x3c00000,                .offset       =   0x0000000        },{                .name         =   "yamon",                .size         =   0x0100000,                .offset       =   0x3c00000,                .mask_flags   =   MTD_WRITEABLE        },{                .name         =   "raw kernel",                .size         =   0x02c0000,                .offset       =   0x3d00000        }};#elif defined(CONFIG_MTD_PB1500_BOOT) && !defined(CONFIG_MTD_PB1500_USER)#define WINDOW_ADDR 0x1E000000#define WINDOW_SIZE 0x2000000static struct mtd_partition pb1xxx_partitions[] = {        {                .name         =   "User FS",                .size         =   0x1c00000,                .offset       =   0x0000000        },{                .name         =   "yamon",                .size         =   0x0100000,                .offset       =   0x1c00000,                .mask_flags   =   MTD_WRITEABLE        },{                .name         =   "raw kernel",                .size         =   0x02c0000,                .offset       =   0x1d00000        }};#elif !defined(CONFIG_MTD_PB1500_BOOT) && defined(CONFIG_MTD_PB1500_USER)#define WINDOW_ADDR 0x1C000000#define WINDOW_SIZE 0x2000000static struct mtd_partition pb1xxx_partitions[] = {        {                .name         =   "User FS",                .size         =    0x1e00000,                .offset       =    0x0000000        },{                .name         =    "raw kernel",                .size         =    0x0200000,                .offset       =    0x1e00000,        }};#else#error MTD_PB1500 define combo error /* should never happen */#endif#else#error Unsupported board#endif#define NAME     	"Pb1x00 Linux Flash"#define PADDR    	WINDOW_ADDR#define BUSWIDTH	4#define SIZE		WINDOW_SIZE#define PARTITIONS	4static struct map_info pb1xxx_mtd_map = {	.name		= NAME,	.size		= SIZE,	.bankwidth	= BUSWIDTH,	.phys		= PADDR,};static struct mtd_info *pb1xxx_mtd;int __init pb1xxx_mtd_init(void){	struct mtd_partition *parts;	int nb_parts = 0;	char *part_type;		/*	 * Static partition definition selection	 */	part_type = "static";	parts = pb1xxx_partitions;	nb_parts = ARRAY_SIZE(pb1xxx_partitions);	/*	 * Now let's probe for the actual flash.  Do it here since	 * specific machine settings might have been set above.	 */	printk(KERN_NOTICE "Pb1xxx flash: probing %d-bit flash bus\n", 			BUSWIDTH*8);	pb1xxx_mtd_map.virt = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);	simple_map_init(&pb1xxx_mtd_map);	pb1xxx_mtd = do_map_probe("cfi_probe", &pb1xxx_mtd_map);	if (!pb1xxx_mtd) return -ENXIO;	pb1xxx_mtd->owner = THIS_MODULE;	add_mtd_partitions(pb1xxx_mtd, parts, nb_parts);	return 0;}static void __exit pb1xxx_mtd_cleanup(void){	if (pb1xxx_mtd) {		del_mtd_partitions(pb1xxx_mtd);		map_destroy(pb1xxx_mtd);		iounmap((void *) pb1xxx_mtd_map.virt);	}}module_init(pb1xxx_mtd_init);module_exit(pb1xxx_mtd_cleanup);MODULE_AUTHOR("Pete Popov");MODULE_DESCRIPTION("Pb1xxx CFI map driver");MODULE_LICENSE("GPL");