| 1 | /* |
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| 2 | * Flash and EPROM on Hitachi Solution Engine and similar boards. |
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| 3 | * |
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| 4 | * (C) 2001 Red Hat, Inc. |
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| 5 | * |
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| 6 | * GPL'd |
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| 7 | */ |
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| 8 | |
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| 9 | #include <linux/module.h> |
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| 10 | #include <linux/types.h> |
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| 11 | #include <linux/kernel.h> |
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| 12 | #include <linux/init.h> |
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| 13 | #include <asm/io.h> |
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| 14 | #include <linux/mtd/mtd.h> |
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| 15 | #include <linux/mtd/map.h> |
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| 16 | #include <linux/mtd/partitions.h> |
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| 17 | #include <linux/errno.h> |
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| 18 | |
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| 19 | static struct mtd_info *flash_mtd; |
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| 20 | static struct mtd_info *eprom_mtd; |
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| 21 | |
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| 22 | struct map_info soleng_eprom_map = { |
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| 23 | .name = "Solution Engine EPROM" , |
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| 24 | .size = 0x400000, |
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| 25 | .bankwidth = 4, |
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| 26 | }; |
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| 27 | |
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| 28 | struct map_info soleng_flash_map = { |
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| 29 | .name = "Solution Engine FLASH" , |
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| 30 | .size = 0x400000, |
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| 31 | .bankwidth = 4, |
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| 32 | }; |
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| 33 | |
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| 34 | static const char * const probes[] = { "RedBoot" , "cmdlinepart" , NULL }; |
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| 35 | |
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| 36 | static int __init init_soleng_maps(void) |
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| 37 | { |
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| 38 | /* First probe at offset 0 */ |
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| 39 | soleng_flash_map.phys = 0; |
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| 40 | soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0); |
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| 41 | soleng_eprom_map.phys = 0x01000000; |
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| 42 | soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000); |
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| 43 | simple_map_init(&soleng_eprom_map); |
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| 44 | simple_map_init(&soleng_flash_map); |
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| 45 | |
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| 46 | printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n" ); |
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| 47 | flash_mtd = do_map_probe(name: "cfi_probe" , map: &soleng_flash_map); |
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| 48 | if (!flash_mtd) { |
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| 49 | /* Not there. Try swapping */ |
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| 50 | printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n" ); |
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| 51 | soleng_flash_map.phys = 0x01000000; |
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| 52 | soleng_flash_map.virt = P2SEGADDR(0x01000000); |
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| 53 | soleng_eprom_map.phys = 0; |
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| 54 | soleng_eprom_map.virt = P1SEGADDR(0); |
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| 55 | flash_mtd = do_map_probe(name: "cfi_probe" , map: &soleng_flash_map); |
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| 56 | if (!flash_mtd) { |
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| 57 | /* Eep. */ |
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| 58 | printk(KERN_NOTICE "Flash chips not detected at either possible location.\n" ); |
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| 59 | return -ENXIO; |
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| 60 | } |
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| 61 | } |
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| 62 | printk(KERN_NOTICE "Solution Engine: Flash at 0x%pap, EPROM at 0x%pap\n" , |
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| 63 | &soleng_flash_map.phys, |
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| 64 | &soleng_eprom_map.phys); |
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| 65 | flash_mtd->owner = THIS_MODULE; |
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| 66 | |
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| 67 | eprom_mtd = do_map_probe(name: "map_rom" , map: &soleng_eprom_map); |
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| 68 | if (eprom_mtd) { |
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| 69 | eprom_mtd->owner = THIS_MODULE; |
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| 70 | mtd_device_register(eprom_mtd, NULL, 0); |
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| 71 | } |
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| 72 | |
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| 73 | mtd_device_parse_register(mtd: flash_mtd, part_probe_types: probes, NULL, NULL, defnr_parts: 0); |
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| 74 | |
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| 75 | return 0; |
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| 76 | } |
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| 77 | |
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| 78 | static void __exit cleanup_soleng_maps(void) |
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| 79 | { |
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| 80 | if (eprom_mtd) { |
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| 81 | mtd_device_unregister(master: eprom_mtd); |
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| 82 | map_destroy(mtd: eprom_mtd); |
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| 83 | } |
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| 84 | |
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| 85 | mtd_device_unregister(master: flash_mtd); |
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| 86 | map_destroy(mtd: flash_mtd); |
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| 87 | } |
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| 88 | |
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| 89 | module_init(init_soleng_maps); |
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| 90 | module_exit(cleanup_soleng_maps); |
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| 91 | |
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| 92 | MODULE_LICENSE("GPL" ); |
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| 93 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>" ); |
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| 94 | MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards" ); |
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| 95 | |
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| 96 | |
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