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1/*2 * Flash and EPROM on Hitachi Solution Engine and similar boards.3 *4 * (C) 2001 Red Hat, Inc.5 *6 * GPL'd7 */8 9#include <linux/module.h>10#include <linux/types.h>11#include <linux/kernel.h>12#include <linux/init.h>13#include <asm/io.h>14#include <linux/mtd/mtd.h>15#include <linux/mtd/map.h>16#include <linux/mtd/partitions.h>17#include <linux/errno.h>18 19static struct mtd_info *flash_mtd;20static struct mtd_info *eprom_mtd;21 22struct map_info soleng_eprom_map = {23 .name = "Solution Engine EPROM",24 .size = 0x400000,25 .bankwidth = 4,26};27 28struct map_info soleng_flash_map = {29 .name = "Solution Engine FLASH",30 .size = 0x400000,31 .bankwidth = 4,32};33 34static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL };35 36static int __init init_soleng_maps(void)37{38 /* First probe at offset 0 */39 soleng_flash_map.phys = 0;40 soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0);41 soleng_eprom_map.phys = 0x01000000;42 soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000);43 simple_map_init(&soleng_eprom_map);44 simple_map_init(&soleng_flash_map);45 46 printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");47 flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);48 if (!flash_mtd) {49 /* Not there. Try swapping */50 printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n");51 soleng_flash_map.phys = 0x01000000;52 soleng_flash_map.virt = P2SEGADDR(0x01000000);53 soleng_eprom_map.phys = 0;54 soleng_eprom_map.virt = P1SEGADDR(0);55 flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);56 if (!flash_mtd) {57 /* Eep. */58 printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");59 return -ENXIO;60 }61 }62 printk(KERN_NOTICE "Solution Engine: Flash at 0x%pap, EPROM at 0x%pap\n",63 &soleng_flash_map.phys,64 &soleng_eprom_map.phys);65 flash_mtd->owner = THIS_MODULE;66 67 eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map);68 if (eprom_mtd) {69 eprom_mtd->owner = THIS_MODULE;70 mtd_device_register(eprom_mtd, NULL, 0);71 }72 73 mtd_device_parse_register(flash_mtd, probes, NULL, NULL, 0);74 75 return 0;76}77 78static void __exit cleanup_soleng_maps(void)79{80 if (eprom_mtd) {81 mtd_device_unregister(eprom_mtd);82 map_destroy(eprom_mtd);83 }84 85 mtd_device_unregister(flash_mtd);86 map_destroy(flash_mtd);87}88 89module_init(init_soleng_maps);90module_exit(cleanup_soleng_maps);91 92MODULE_LICENSE("GPL");93MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");94MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards");95 96