sa1100-flash.c

移植到2410开发板上的源代码

#ifdef CONFIG_SA1100_JORNADA720
#define JORNADA720_FLASH_SIZE		0x02000000
static struct mtd_partition jornada720_partitions[] = {
	{
		name:		"JORNADA720 boot firmware",
		size:		0x00040000,
		offset:		0,
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}, {
		name:		"JORNADA720 kernel",
		size:		0x000c0000,
		offset:		0x00040000,
	}, {
		name:		"JORNADA720 params",
		size:		0x00040000,
		offset:		0x00100000,
	}, {
		name:		"JORNADA720 initrd",
		size:		0x00100000,
		offset:		0x00140000,
	}, {
		name:		"JORNADA720 root cramfs",
		size:		0x00300000,
		offset:		0x00240000,
	}, {
		name:		"JORNADA720 usr cramfs",
		size:		0x00800000,
		offset:		0x00540000,
	}, {
		name:		"JORNADA720 usr local",
		size:		0  /* will expand to the end of the flash */
		offset:		0x00d00000,
	}
};

static void jornada720_set_vpp(int vpp)
{
	if (vpp)
		PPSR |= 0x80;
	else
		PPSR &= ~0x80;
	PPDR |= 0x80;
}

#endif

#ifdef CONFIG_SA1100_NANOENGINE
/* nanoEngine has one 28F320B3B Flash part in bank 0: */
#define NANOENGINE_FLASH_SIZE		0x00400000
static struct mtd_partition nanoengine_partitions[] = {
	{
		name:		"nanoEngine boot firmware and parameter table",
		size:		0x00010000,  /* 32K */
		offset:		0x00000000,
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	},{
		name:		"kernel/initrd reserved",
		size:		0x002f0000,
		offset:		0x00010000,
	},{
		name:		"experimental filesystem allocation",
		size:		0x00100000,
		offset:		0x00300000,
	}
};
#endif

#ifdef CONFIG_SA1100_PANGOLIN
#define PANGOLIN_FLASH_SIZE		0x04000000
static struct mtd_partition pangolin_partitions[] = {
	{
		name:		"boot firmware",
		size:		0x00080000,
		offset:		0x00000000,
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}, {
		name:		"kernel",
		size:		0x00100000,
		offset:		0x00080000,
	}, {
		name:		"initrd",
		size:		0x00280000,
		offset:		0x00180000,
	}, {
		name:		"initrd-test",
		size:		0x03C00000,
		offset:		0x00400000,
	}
};
#endif

#ifdef CONFIG_SA1100_PT_SYSTEM3
/* erase size is 0x40000 == 256k partitions have to have this boundary */
#define SYSTEM3_FLASH_SIZE		0x01000000
static struct mtd_partition system3_partitions[] = {
	{
		name:		"BLOB",
		size:		0x00040000,
		offset:		0x00000000,
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}, {
		name:		"config",
		size:		0x00040000,
		offset:		MTDPART_OFS_APPEND,
	}, {
		name:		"kernel",
		size:		0x00100000,
		offset:		MTDPART_OFS_APPEND,
	}, {
		name:		"root",
		size:		MTDPART_SIZ_FULL,
		offset:		MTDPART_OFS_APPEND,
	}
};
#endif

#ifdef CONFIG_SA1100_SHANNON
#define SHANNON_FLASH_SIZE		0x00400000
static struct mtd_partition shannon_partitions[] = {
	{
		name: "BLOB boot loader",
		offset: 0,
		size: 0x20000
	},
	{
		name: "kernel",
		offset: MTDPART_OFS_APPEND,
		size: 0xe0000
	},
	{ 
		name: "initrd",
		offset: MTDPART_OFS_APPEND,	
		size: MTDPART_SIZ_FULL
	}
};

#endif

#ifdef CONFIG_SA1100_SHERMAN
#define SHERMAN_FLASH_SIZE		0x02000000
static struct mtd_partition sherman_partitions[] = {
	{
		size:		0x50000,
		offset:		0,
	}, {
		size:		0x70000,
		offset:		MTDPART_OFS_APPEND,
	}, {
		size:		0x600000,
		offset:		MTDPART_OFS_APPEND,
	}, {
		size:		0xA0000,
		offset:		MTDPART_OFS_APPEND,
	}
};
#endif

#ifdef CONFIG_SA1100_SIMPAD
#define SIMPAD_FLASH_SIZE		0x02000000
static struct mtd_partition simpad_partitions[] = {
	{
		name:		"SIMpad boot firmware",
		size:		0x00080000,
		offset:		0,
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}, {
		name:		"SIMpad kernel",
		size:		0x00100000,
		offset:		0x00080000,
	}, {
#ifdef CONFIG_JFFS2_FS
		name:		"SIMpad root jffs2",
		size:		MTDPART_SIZ_FULL,
		offset:		0x00180000,
#else
		name:		"SIMpad initrd",
		size:		0x00300000,
		offset:		0x00180000,
	}, {
		name:		"SIMpad root cramfs",
		size:		0x00300000,
		offset:		0x00480000,
	}, {
		name:		"SIMpad usr cramfs",
		size:		0x005c0000,
		offset:		0x00780000,
	}, {
		name:		"SIMpad usr local",
		size:		MTDPART_SIZ_FULL,
		offset:		0x00d40000,
#endif
	}
};
#endif /* CONFIG_SA1100_SIMPAD */

#ifdef CONFIG_SA1100_STORK
#define STORK_FLASH_SIZE		0x02000000
static struct mtd_partition stork_partitions[] = {
	{
		name:		"STORK boot firmware",
		size:		0x00040000,
		offset:		0,
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}, {
		name:		"STORK params",
		size:		0x00040000,
		offset:		0x00040000,
	}, {
		name:		"STORK kernel",
		size:		0x00100000,
		offset:		0x00080000,
	}, {
#ifdef CONFIG_JFFS2_FS
		name:		"STORK root jffs2",
		offset:		0x00180000,
		size:		MTDPART_SIZ_FULL,
#else
		name:		"STORK initrd",
		size:		0x00100000,
		offset:		0x00180000,
	}, {
		name:		"STORK root cramfs",
		size:		0x00300000,
		offset:		0x00280000,
	}, {
		name:		"STORK usr cramfs",
		size:		0x00800000,
		offset:		0x00580000,
	}, {
		name:		"STORK usr local",
		offset:		0x00d80000,
		size:		MTDPART_SIZ_FULL,
#endif
	}
};
#endif

#ifdef CONFIG_SA1100_YOPY
#define YOPY_FLASH_SIZE			0x08000000
static struct mtd_partition yopy_partitions[] = {
	{
		name:		"boot firmware",
		size:		0x00040000,
		offset:		0x00000000,
		mask_flags:	MTD_WRITEABLE,  /* force read-only */
	}, {
		name:		"kernel",
		size:		0x00080000,
		offset:		0x00080000,
	}, {
		name:		"initrd",
		size:		0x00300000,
		offset:		0x00100000,
	}, {
		name:		"root",
		size:		0x01000000,
		offset:		0x00400000,
	}
};
#endif

extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts);
extern int parse_bootldr_partitions(struct mtd_info *master, struct mtd_partition **pparts);

static struct mtd_partition *parsed_parts;
static struct mtd_info *mymtd;

int __init sa1100_mtd_init(void)
{
	struct mtd_partition *parts;
	int nb_parts = 0, ret;
	int parsed_nr_parts = 0;
	const char *part_type;
	unsigned long base = -1UL;

	/* Default flash buswidth */
	sa1100_map.buswidth = (MSC0 & MSC_RBW) ? 2 : 4;

	/*
	 * Static partition definition selection
	 */
	part_type = "static";

#ifdef CONFIG_SA1100_ADSBITSY
	if (machine_is_adsbitsy()) {
		parts = adsbitsy_partitions;
		nb_parts = ARRAY_SIZE(adsbitsy_partitions);
		sa1100_map.size = ADSBITSY_FLASH_SIZE;
		sa1100_map.buswidth = (MSC1 & MSC_RBW) ? 2 : 4;
	}
#endif
#ifdef CONFIG_SA1100_ASSABET
	if (machine_is_assabet()) {
		parts = assabet_partitions;
		nb_parts = ARRAY_SIZE(assabet_partitions);
		sa1100_map.size = ASSABET_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_BADGE4
	if (machine_is_badge4()) {
		parts = badge4_partitions;
		nb_parts = ARRAY_SIZE(badge4_partitions);
		sa1100_map.size = BADGE4_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_CERF
	if (machine_is_cerf()) {
		parts = cerf_partitions;
		nb_parts = ARRAY_SIZE(cerf_partitions);
		sa1100_map.size = CERF_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_CONSUS
	if (machine_is_consus()) {
		parts = consus_partitions;
		nb_parts = ARRAY_SIZE(consus_partitions);
		sa1100_map.size = CONSUS_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_FLEXANET
	if (machine_is_flexanet()) {
		parts = flexanet_partitions;
		nb_parts = ARRAY_SIZE(flexanet_partitions);
		sa1100_map.size = FLEXANET_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_FREEBIRD
	if (machine_is_freebird()) {
		parts = freebird_partitions;
		nb_parts = ARRAY_SIZE(freebird_partitions);
		sa1100_map.size = FREEBIRD_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_FRODO
	if (machine_is_frodo()) {
		parts = frodo_partitions;
		nb_parts = ARRAY_SIZE(frodo_partitions);
		sa1100_map.size = FRODO_FLASH_SIZE;
		base = 0x00000000;
	}
#endif
#ifdef CONFIG_SA1100_GRAPHICSCLIENT
	if (machine_is_graphicsclient()) {
		parts = graphicsclient_partitions;
		nb_parts = ARRAY_SIZE(graphicsclient_partitions);
		sa1100_map.size = GRAPHICSCLIENT_FLASH_SIZE;
		sa1100_map.buswidth = (MSC1 & MSC_RBW) ? 2:4;
	}
#endif
#ifdef CONFIG_SA1100_GRAPHICSMASTER
	if (machine_is_graphicsmaster()) {
		parts = graphicsmaster_partitions;
		nb_parts = ARRAY_SIZE(graphicsmaster_partitions);
		sa1100_map.size = GRAPHICSMASTER_FLASH_SIZE;
		sa1100_map.buswidth = (MSC1 & MSC_RBW) ? 2:4;
	}
#endif
#ifdef CONFIG_SA1100_H3600
	if (machine_is_h3600()) {
		parts = h3600_partitions;
		nb_parts = ARRAY_SIZE(h3600_partitions);
		sa1100_map.size = H3600_FLASH_SIZE;
		sa1100_map.set_vpp = h3600_set_vpp;
	}
#endif
#ifdef CONFIG_SA1100_HUW_WEBPANEL
	if (machine_is_huw_webpanel()) {
		parts = huw_webpanel_partitions;
		nb_parts = ARRAY_SIZE(huw_webpanel_partitions);
		sa1100_map.size = HUW_WEBPANEL_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_JORNADA720
	if (machine_is_jornada720()) {
		parts = jornada720_partitions;
		nb_parts = ARRAY_SIZE(jornada720_partitions);
		sa1100_map.size = JORNADA720_FLASH_SIZE;
		sa1100_map.set_vpp = jornada720_set_vpp;
	}
#endif
#ifdef CONFIG_SA1100_NANOENGINE
	if (machine_is_nanoengine()) {
		parts = nanoengine_partitions;
		nb_parts = ARRAY_SIZE(nanoengine_partitions);
		sa1100_map.size = NANOENGINE_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_PANGOLIN
	if (machine_is_pangolin()) {
		parts = pangolin_partitions;
		nb_parts = ARRAY_SIZE(pangolin_partitions);
		sa1100_map.size = PANGOLIN_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_PT_SYSTEM3
	if (machine_is_pt_system3()) {
		parts = system3_partitions;
		nb_parts = ARRAY_SIZE(system3_partitions);
		sa1100_map.size = SYSTEM3_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_SHANNON
	if (machine_is_shannon()) {
		parts = shannon_partitions;
		nb_parts = ARRAY_SIZE(shannon_partitions);
		sa1100_map.size = SHANNON_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_SHERMAN
	if (machine_is_sherman()) {
		parts = sherman_partitions;
		nb_parts = ARRAY_SIZE(sherman_partitions);
		sa1100_map.size = SHERMAN_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_SIMPAD
	if (machine_is_simpad()) {
		parts = simpad_partitions;
		nb_parts = ARRAY_SIZE(simpad_partitions);
		sa1100_map.size = SIMPAD_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_STORK
	if (machine_is_stork()) {
		parts = stork_partitions;
		nb_parts = ARRAY_SIZE(stork_partitions);
		sa1100_map.size = STORK_FLASH_SIZE;
	}
#endif
#ifdef CONFIG_SA1100_YOPY
	if (machine_is_yopy()) {
		parts = yopy_partitions;
		nb_parts = ARRAY_SIZE(yopy_partitions);
		sa1100_map.size = YOPY_FLASH_SIZE;
	}
#endif

	/*
	 * For simple flash devices, use ioremap to map the flash.
	 */
	if (base != (unsigned long)-1) {
		if (!request_mem_region(base, sa1100_map.size, "flash"))
			return -EBUSY;
		sa1100_map.map_priv_2 = base;
		sa1100_map.map_priv_1 = (unsigned long)
				ioremap(base, sa1100_map.size);
		ret = -ENOMEM;
		if (!sa1100_map.map_priv_1)
			goto out_err;
	}

	/*
	 * Now let's probe for the actual flash.  Do it here since
	 * specific machine settings might have been set above.
	 */
	printk(KERN_NOTICE "SA1100 flash: probing %d-bit flash bus\n", sa1100_map.buswidth*8);
	mymtd = do_map_probe("jedec_probe", &sa1100_map);
	if (!mymtd)
		mymtd = do_map_probe("cfi_probe", &sa1100_map);
	ret = -ENXIO;
	if (!mymtd)
		goto out_err;
	mymtd->module = THIS_MODULE;

	/*
	 * Dynamic partition selection stuff (might override the static ones)
	 */
#ifdef CONFIG_MTD_REDBOOT_PARTS
	if (parsed_nr_parts == 0) {
		int ret = parse_redboot_partitions(mymtd, &parsed_parts);

		if (ret > 0) {
			part_type = "RedBoot";
			parsed_nr_parts = ret;
		}
	}
#endif
#ifdef CONFIG_MTD_CMDLINE_PARTS
	if (parsed_nr_parts == 0) {
		int ret = parse_cmdline_partitions(mymtd, &parsed_parts, "sa1100");
		if (ret > 0) {
			part_type = "Command Line";
			parsed_nr_parts = ret;
		}
	}
#endif

	if (parsed_nr_parts > 0) {
		parts = parsed_parts;
		nb_parts = parsed_nr_parts;
	}

	if (nb_parts == 0) {
		printk(KERN_NOTICE "SA1100 flash: no partition info available, registering whole flash at once\n");
		add_mtd_device(mymtd);
	} else {
		printk(KERN_NOTICE "Using %s partition definition\n", part_type);
		add_mtd_partitions(mymtd, parts, nb_parts);
	}
	return 0;

 out_err:
	if (sa1100_map.map_priv_2 != -1) {
		iounmap((void *)sa1100_map.map_priv_1);
		release_mem_region(sa1100_map.map_priv_2, sa1100_map.size);
	}
	return ret;
}

static void __exit sa1100_mtd_cleanup(void)
{
	if (mymtd) {
		del_mtd_partitions(mymtd);
		map_destroy(mymtd);
		if (parsed_parts)
			kfree(parsed_parts);
	}
	if (sa1100_map.map_priv_2 != -1) {
		iounmap((void *)sa1100_map.map_priv_1);
		release_mem_region(sa1100_map.map_priv_2, sa1100_map.size);
	}
}

module_init(sa1100_mtd_init);
module_exit(sa1100_mtd_cleanup);

MODULE_AUTHOR("Nicolas Pitre");
MODULE_DESCRIPTION("SA1100 CFI map driver");
MODULE_LICENSE("GPL");