/* * Flash memory access on AMD Alchemy evaluation boards * * $Id: alchemy-flash.c,v 1.2 2005/11/07 11:14:26 gleixner Exp $ * * (C) 2003, 2004 Pete Popov <ppopov@embeddedalley.com> * */#include <linux/config.h>#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 	DEBUG_RW#define	DBG(x...)	printk(x)#else#define	DBG(x...)#endif#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_HYDROGEN3#define BOARD_MAP_NAME "Hydrogen3 Flash"#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */#define BOARD_FLASH_WIDTH 4 /* 32-bits */#define USE_LOCAL_ACCESSORS /* why? */#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? */#endifstatic 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,        }};#define NB_OF(x)  (sizeof(x)/sizeof(x[0]))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;#ifdef CONFIG_MIPS_MIRAGE_WHY	/* Boot ROM flash bank only; no user bank */	window_addr = 0x1C000000;	window_size = 0x04000000;	/* USERFS from 0x1C00 0000 to 0x1FC00000 */	alchemy_partitions[0].size = 0x03C00000;#endif	/*	 * Static partition definition selection	 */	parts = alchemy_partitions;	nb_parts = NB_OF(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");