diff options
Diffstat (limited to 'drivers/mtd/maps/solutionengine.c')
| -rw-r--r-- | drivers/mtd/maps/solutionengine.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/mtd/maps/solutionengine.c b/drivers/mtd/maps/solutionengine.c new file mode 100644 index 000000000000..8ce5d897645c --- /dev/null +++ b/drivers/mtd/maps/solutionengine.c @@ -0,0 +1,137 @@ +/* + * $Id: solutionengine.c,v 1.14 2004/09/16 23:27:14 gleixner Exp $ + * + * Flash and EPROM on Hitachi Solution Engine and similar boards. + * + * (C) 2001 Red Hat, Inc. + * + * GPL'd + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <asm/io.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> +#include <linux/config.h> +#include <linux/errno.h> + +static struct mtd_info *flash_mtd; +static struct mtd_info *eprom_mtd; + +static struct mtd_partition *parsed_parts; + +struct map_info soleng_eprom_map = { + .name = "Solution Engine EPROM", + .size = 0x400000, + .bankwidth = 4, +}; + +struct map_info soleng_flash_map = { + .name = "Solution Engine FLASH", + .size = 0x400000, + .bankwidth = 4, +}; + +static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; + +#ifdef CONFIG_MTD_SUPERH_RESERVE +static struct mtd_partition superh_se_partitions[] = { + /* Reserved for boot code, read-only */ + { + .name = "flash_boot", + .offset = 0x00000000, + .size = CONFIG_MTD_SUPERH_RESERVE, + .mask_flags = MTD_WRITEABLE, + }, + /* All else is writable (e.g. JFFS) */ + { + .name = "Flash FS", + .offset = MTDPART_OFS_NXTBLK, + .size = MTDPART_SIZ_FULL, + } +}; +#endif /* CONFIG_MTD_SUPERH_RESERVE */ + +static int __init init_soleng_maps(void) +{ + int nr_parts = 0; + + /* First probe at offset 0 */ + soleng_flash_map.phys = 0; + soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0); + soleng_eprom_map.phys = 0x01000000; + soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000); + simple_map_init(&soleng_eprom_map); + simple_map_init(&soleng_flash_map); + + printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n"); + flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map); + if (!flash_mtd) { + /* Not there. Try swapping */ + printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n"); + soleng_flash_map.phys = 0x01000000; + soleng_flash_map.virt = P2SEGADDR(0x01000000); + soleng_eprom_map.phys = 0; + soleng_eprom_map.virt = P1SEGADDR(0); + flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map); + if (!flash_mtd) { + /* Eep. */ + printk(KERN_NOTICE "Flash chips not detected at either possible location.\n"); + return -ENXIO; + } + } + printk(KERN_NOTICE "Solution Engine: Flash at 0x%08lx, EPROM at 0x%08lx\n", + soleng_flash_map.phys & 0x1fffffff, + soleng_eprom_map.phys & 0x1fffffff); + flash_mtd->owner = THIS_MODULE; + + eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map); + if (eprom_mtd) { + eprom_mtd->owner = THIS_MODULE; + add_mtd_device(eprom_mtd); + } + + nr_parts = parse_mtd_partitions(flash_mtd, probes, &parsed_parts, 0); + +#ifdef CONFIG_MTD_SUPERH_RESERVE + if (nr_parts <= 0) { + printk(KERN_NOTICE "Using configured partition at 0x%08x.\n", + CONFIG_MTD_SUPERH_RESERVE); + parsed_parts = superh_se_partitions; + nr_parts = sizeof(superh_se_partitions)/sizeof(*parsed_parts); + } +#endif /* CONFIG_MTD_SUPERH_RESERVE */ + + if (nr_parts > 0) + add_mtd_partitions(flash_mtd, parsed_parts, nr_parts); + else + add_mtd_device(flash_mtd); + + return 0; +} + +static void __exit cleanup_soleng_maps(void) +{ + if (eprom_mtd) { + del_mtd_device(eprom_mtd); + map_destroy(eprom_mtd); + } + + if (parsed_parts) + del_mtd_partitions(flash_mtd); + else + del_mtd_device(flash_mtd); + map_destroy(flash_mtd); +} + +module_init(init_soleng_maps); +module_exit(cleanup_soleng_maps); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); +MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards"); + |