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95 lines
2.4 KiB
95 lines
2.4 KiB
/* |
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* Flash and EPROM on Hitachi Solution Engine and similar boards. |
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* |
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* (C) 2001 Red Hat, Inc. |
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* |
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* GPL'd |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <asm/io.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/map.h> |
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#include <linux/mtd/partitions.h> |
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#include <linux/errno.h> |
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static struct mtd_info *flash_mtd; |
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static struct mtd_info *eprom_mtd; |
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struct map_info soleng_eprom_map = { |
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.name = "Solution Engine EPROM", |
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.size = 0x400000, |
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.bankwidth = 4, |
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}; |
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struct map_info soleng_flash_map = { |
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.name = "Solution Engine FLASH", |
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.size = 0x400000, |
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.bankwidth = 4, |
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}; |
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static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL }; |
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static int __init init_soleng_maps(void) |
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{ |
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/* First probe at offset 0 */ |
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soleng_flash_map.phys = 0; |
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soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0); |
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soleng_eprom_map.phys = 0x01000000; |
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soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000); |
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simple_map_init(&soleng_eprom_map); |
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simple_map_init(&soleng_flash_map); |
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printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n"); |
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flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map); |
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if (!flash_mtd) { |
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/* Not there. Try swapping */ |
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printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n"); |
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soleng_flash_map.phys = 0x01000000; |
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soleng_flash_map.virt = P2SEGADDR(0x01000000); |
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soleng_eprom_map.phys = 0; |
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soleng_eprom_map.virt = P1SEGADDR(0); |
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flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map); |
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if (!flash_mtd) { |
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/* Eep. */ |
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printk(KERN_NOTICE "Flash chips not detected at either possible location.\n"); |
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return -ENXIO; |
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} |
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} |
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printk(KERN_NOTICE "Solution Engine: Flash at 0x%pap, EPROM at 0x%pap\n", |
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&soleng_flash_map.phys, |
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&soleng_eprom_map.phys); |
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flash_mtd->owner = THIS_MODULE; |
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eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map); |
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if (eprom_mtd) { |
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eprom_mtd->owner = THIS_MODULE; |
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mtd_device_register(eprom_mtd, NULL, 0); |
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} |
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mtd_device_parse_register(flash_mtd, probes, NULL, NULL, 0); |
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return 0; |
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} |
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static void __exit cleanup_soleng_maps(void) |
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{ |
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if (eprom_mtd) { |
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mtd_device_unregister(eprom_mtd); |
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map_destroy(eprom_mtd); |
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} |
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mtd_device_unregister(flash_mtd); |
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map_destroy(flash_mtd); |
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} |
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module_init(init_soleng_maps); |
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module_exit(cleanup_soleng_maps); |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("David Woodhouse <[email protected]>"); |
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MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards"); |
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