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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596/* * 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/errno.h>
static struct mtd_info *flash_mtd;static struct mtd_info *eprom_mtd;
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 * const probes[] = { "RedBoot", "cmdlinepart", NULL };
static int __init init_soleng_maps(void){ /* 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%pap, EPROM at 0x%pap\n", &soleng_flash_map.phys, &soleng_eprom_map.phys); flash_mtd->owner = THIS_MODULE;
eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map); if (eprom_mtd) { eprom_mtd->owner = THIS_MODULE; mtd_device_register(eprom_mtd, NULL, 0); }
mtd_device_parse_register(flash_mtd, probes, NULL, NULL, 0);
return 0;}
static void __exit cleanup_soleng_maps(void){ if (eprom_mtd) { mtd_device_unregister(eprom_mtd); map_destroy(eprom_mtd); }
mtd_device_unregister(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");