[deliverable/linux.git] / drivers / mtd / maps / alchemy-flash.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;

static 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");
Commit	Line	Data
002fa301 PP	1	/*
002fa301 PP	2	* Flash memory access on AMD Alchemy evaluation boards
69f34c98	3	*
002fa301	4	* (C) 2003, 2004 Pete Popov <ppopov@embeddedalley.com>
002fa301 PP	5	*/
002fa301 PP	6
002fa301 PP	7	#include <linux/init.h>
	8	#include <linux/module.h>
	9	#include <linux/types.h>
	10	#include <linux/kernel.h>
	11
	12	#include <linux/mtd/mtd.h>
	13	#include <linux/mtd/map.h>
	14	#include <linux/mtd/partitions.h>
	15
	16	#include <asm/io.h>
	17
002fa301 PP	18	#ifdef CONFIG_MIPS_PB1000
	19	#define BOARD_MAP_NAME "Pb1000 Flash"
	20	#define BOARD_FLASH_SIZE 0x00800000 /* 8MB */
	21	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	22	#endif
	23
	24	#ifdef CONFIG_MIPS_PB1500
	25	#define BOARD_MAP_NAME "Pb1500 Flash"
	26	#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
	27	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	28	#endif
	29
	30	#ifdef CONFIG_MIPS_PB1100
	31	#define BOARD_MAP_NAME "Pb1100 Flash"
	32	#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
	33	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	34	#endif
	35
	36	#ifdef CONFIG_MIPS_PB1550
	37	#define BOARD_MAP_NAME "Pb1550 Flash"
	38	#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
	39	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	40	#endif
	41
	42	#ifdef CONFIG_MIPS_PB1200
	43	#define BOARD_MAP_NAME "Pb1200 Flash"
	44	#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
	45	#define BOARD_FLASH_WIDTH 2 /* 16-bits */
	46	#endif
	47
	48	#ifdef CONFIG_MIPS_DB1000
	49	#define BOARD_MAP_NAME "Db1000 Flash"
	50	#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
	51	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	52	#endif
	53
	54	#ifdef CONFIG_MIPS_DB1500
	55	#define BOARD_MAP_NAME "Db1500 Flash"
	56	#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
	57	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	58	#endif
	59
	60	#ifdef CONFIG_MIPS_DB1100
	61	#define BOARD_MAP_NAME "Db1100 Flash"
	62	#define BOARD_FLASH_SIZE 0x02000000 /* 32MB */
	63	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	64	#endif
	65
	66	#ifdef CONFIG_MIPS_DB1550
	67	#define BOARD_MAP_NAME "Db1550 Flash"
	68	#define BOARD_FLASH_SIZE 0x08000000 /* 128MB */
	69	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	70	#endif
	71
	72	#ifdef CONFIG_MIPS_DB1200
	73	#define BOARD_MAP_NAME "Db1200 Flash"
	74	#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
	75	#define BOARD_FLASH_WIDTH 2 /* 16-bits */
	76	#endif
	77
002fa301 PP	78	#ifdef CONFIG_MIPS_BOSPORUS
	79	#define BOARD_MAP_NAME "Bosporus Flash"
	80	#define BOARD_FLASH_SIZE 0x01000000 /* 16MB */
	81	#define BOARD_FLASH_WIDTH 2 /* 16-bits */
	82	#endif
	83
	84	#ifdef CONFIG_MIPS_MIRAGE
	85	#define BOARD_MAP_NAME "Mirage Flash"
	86	#define BOARD_FLASH_SIZE 0x04000000 /* 64MB */
	87	#define BOARD_FLASH_WIDTH 4 /* 32-bits */
	88	#define USE_LOCAL_ACCESSORS /* why? */
	89	#endif
	90
	91	static struct map_info alchemy_map = {
	92	.name = BOARD_MAP_NAME,
	93	};
	94
	95	static struct mtd_partition alchemy_partitions[] = {
	96	{
	97	.name = "User FS",
	98	.size = BOARD_FLASH_SIZE - 0x00400000,
	99	.offset = 0x0000000
	100	},{
	101	.name = "YAMON",
	102	.size = 0x0100000,
	103	.offset = MTDPART_OFS_APPEND,
	104	.mask_flags = MTD_WRITEABLE
	105	},{
	106	.name = "raw kernel",
	107	.size = (0x300000 - 0x40000), /* last 256KB is yamon env */
	108	.offset = MTDPART_OFS_APPEND,
	109	}
	110	};
	111
002fa301 PP	112	static struct mtd_info *mymtd;
002fa301 PP	113
b93dc2e9	114	static int __init alchemy_mtd_init(void)
002fa301 PP	115	{
	116	struct mtd_partition *parts;
	117	int nb_parts = 0;
	118	unsigned long window_addr;
	119	unsigned long window_size;
69f34c98	120
002fa301 PP	121	/* Default flash buswidth */
	122	alchemy_map.bankwidth = BOARD_FLASH_WIDTH;
	123
	124	window_addr = 0x20000000 - BOARD_FLASH_SIZE;
	125	window_size = BOARD_FLASH_SIZE;
002fa301 PP	126
	127	/*
	128	* Static partition definition selection
	129	*/
	130	parts = alchemy_partitions;
87d10f3c	131	nb_parts = ARRAY_SIZE(alchemy_partitions);
002fa301 PP	132	alchemy_map.size = window_size;
	133
	134	/*
	135	* Now let's probe for the actual flash. Do it here since
	136	* specific machine settings might have been set above.
	137	*/
69f34c98	138	printk(KERN_NOTICE BOARD_MAP_NAME ": probing %d-bit flash bus\n",
002fa301 PP	139	alchemy_map.bankwidth*8);
	140	alchemy_map.virt = ioremap(window_addr, window_size);
	141	mymtd = do_map_probe("cfi_probe", &alchemy_map);
	142	if (!mymtd) {
	143	iounmap(alchemy_map.virt);
	144	return -ENXIO;
	145	}
	146	mymtd->owner = THIS_MODULE;
	147
	148	add_mtd_partitions(mymtd, parts, nb_parts);
	149	return 0;
	150	}
	151
	152	static void __exit alchemy_mtd_cleanup(void)
	153	{
	154	if (mymtd) {
	155	del_mtd_partitions(mymtd);
	156	map_destroy(mymtd);
	157	iounmap(alchemy_map.virt);
	158	}
	159	}
	160
	161	module_init(alchemy_mtd_init);
	162	module_exit(alchemy_mtd_cleanup);
	163
	164	MODULE_AUTHOR("Embedded Alley Solutions, Inc");
	165	MODULE_DESCRIPTION(BOARD_MAP_NAME " MTD driver");
	166	MODULE_LICENSE("GPL");