| 1 | |
| 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 |
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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("cfi_probe", &soleng_flash_map);
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| 48 | if (!flash_mtd) {
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| 49 |
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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("cfi_probe", &soleng_flash_map);
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| 56 | if (!flash_mtd) {
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| 57 |
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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("map_rom", &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(flash_mtd, probes, NULL, NULL, 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(eprom_mtd);
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| 82 | map_destroy(eprom_mtd);
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| 83 | }
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| 84 |
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| 85 | mtd_device_unregister(flash_mtd);
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| 86 | map_destroy(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 <[email protected]>");
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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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