projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 1da177e4 LT |
2 | * Map for flash chips on Wind River PowerQUICC II SBC82xx board. |
| 3 | * | |
| 4 | * Copyright (C) 2004 Red Hat, Inc. | |
| 5 | * | |
| 6 | * Author: David Woodhouse <dwmw2@infradead.org> | |
| 7 | * | |
| 8 | */ | |
| 9 | ||
| 10 | #include <linux/module.h> | |
| 11 | #include <linux/types.h> | |
| 12 | #include <linux/kernel.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/slab.h> | |
| 15 | #include <asm/io.h> | |
| 16 | #include <linux/mtd/mtd.h> | |
| 17 | #include <linux/mtd/map.h> | |
| 1da177e4 LT |
18 | #include <linux/mtd/partitions.h> |
| 19 | ||
| 20 | #include <asm/immap_cpm2.h> | |
| 21 | ||
| 22 | static struct mtd_info *sbcmtd[3]; | |
| 1da177e4 LT |
23 | |
| 24 | struct map_info sbc82xx_flash_map[3] = { | |
| 25 | {.name = "Boot flash"}, | |
| 26 | {.name = "Alternate boot flash"}, | |
| 27 | {.name = "User flash"} | |
| 28 | }; | |
| 29 | ||
| 30 | static struct mtd_partition smallflash_parts[] = { | |
| 31 | { | |
| 32 | .name = "space", | |
| 33 | .size = 0x100000, | |
| 34 | .offset = 0, | |
| 35 | }, { | |
| 36 | .name = "bootloader", | |
| 37 | .size = MTDPART_SIZ_FULL, | |
| 38 | .offset = MTDPART_OFS_APPEND, | |
| 39 | } | |
| 40 | }; | |
| 41 | ||
| 42 | static struct mtd_partition bigflash_parts[] = { | |
| 43 | { | |
| 44 | .name = "bootloader", | |
| 45 | .size = 0x00100000, | |
| 46 | .offset = 0, | |
| 47 | }, { | |
| 48 | .name = "file system", | |
| 49 | .size = 0x01f00000, | |
| 50 | .offset = MTDPART_OFS_APPEND, | |
| 51 | }, { | |
| 52 | .name = "boot config", | |
| 53 | .size = 0x00100000, | |
| 54 | .offset = MTDPART_OFS_APPEND, | |
| 55 | }, { | |
| 56 | .name = "space", | |
| 57 | .size = 0x01f00000, | |
| 58 | .offset = MTDPART_OFS_APPEND, | |
| 59 | } | |
| 60 | }; | |
| 61 | ||
| 62 | static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; | |
| 63 | ||
| 64 | #define init_sbc82xx_one_flash(map, br, or) \ | |
| 65 | do { \ | |
| 66 | (map).phys = (br & 1) ? (br & 0xffff8000) : 0; \ | |
| 67 | (map).size = (br & 1) ? (~(or & 0xffff8000) + 1) : 0; \ | |
| 68 | switch (br & 0x00001800) { \ | |
| 69 | case 0x00000000: \ | |
| 70 | case 0x00000800: (map).bankwidth = 1; break; \ | |
| 71 | case 0x00001000: (map).bankwidth = 2; break; \ | |
| 72 | case 0x00001800: (map).bankwidth = 4; break; \ | |
| 73 | } \ | |
| 74 | } while (0); | |
| 75 | ||
| 8d240325 | 76 | static int __init init_sbc82xx_flash(void) |
| 1da177e4 LT |
77 | { |
| 78 | volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl; | |
| 79 | int bigflash; | |
| 80 | int i; | |
| 81 | ||
| 82 | #ifdef CONFIG_SBC8560 | |
| 83 | mc = ioremap(0xff700000 + 0x5000, sizeof(memctl_cpm2_t)); | |
| 84 | #else | |
| 85 | mc = &cpm2_immr->im_memctl; | |
| 86 | #endif | |
| 87 | ||
| 88 | bigflash = 1; | |
| 89 | if ((mc->memc_br0 & 0x00001800) == 0x00001800) | |
| 90 | bigflash = 0; | |
| 91 | ||
| 92 | init_sbc82xx_one_flash(sbc82xx_flash_map[0], mc->memc_br0, mc->memc_or0); | |
| 93 | init_sbc82xx_one_flash(sbc82xx_flash_map[1], mc->memc_br6, mc->memc_or6); | |
| 94 | init_sbc82xx_one_flash(sbc82xx_flash_map[2], mc->memc_br1, mc->memc_or1); | |
| 95 | ||
| 96 | #ifdef CONFIG_SBC8560 | |
| 97 | iounmap((void *) mc); | |
| 98 | #endif | |
| 99 | ||
| 100 | for (i=0; i<3; i++) { | |
| 101 | int8_t flashcs[3] = { 0, 6, 1 }; | |
| 102 | int nr_parts; | |
| e062e2f5 | 103 | struct mtd_partition *defparts; |
| 1da177e4 LT |
104 | |
| 105 | printk(KERN_NOTICE "PowerQUICC II %s (%ld MiB on CS%d", | |
| 106 | sbc82xx_flash_map[i].name, | |
| 107 | (sbc82xx_flash_map[i].size >> 20), | |
| 108 | flashcs[i]); | |
| 109 | if (!sbc82xx_flash_map[i].phys) { | |
| 110 | /* We know it can't be at zero. */ | |
| 111 | printk("): disabled by bootloader.\n"); | |
| 112 | continue; | |
| 113 | } | |
| 114 | printk(" at %08lx)\n", sbc82xx_flash_map[i].phys); | |
| 115 | ||
| e062e2f5 DES |
116 | sbc82xx_flash_map[i].virt = ioremap(sbc82xx_flash_map[i].phys, |
| 117 | sbc82xx_flash_map[i].size); | |
| 1da177e4 LT |
118 | |
| 119 | if (!sbc82xx_flash_map[i].virt) { | |
| 120 | printk("Failed to ioremap\n"); | |
| 121 | continue; | |
| 122 | } | |
| 123 | ||
| 124 | simple_map_init(&sbc82xx_flash_map[i]); | |
| 125 | ||
| 126 | sbcmtd[i] = do_map_probe("cfi_probe", &sbc82xx_flash_map[i]); | |
| 127 | ||
| 128 | if (!sbcmtd[i]) | |
| 129 | continue; | |
| 130 | ||
| 131 | sbcmtd[i]->owner = THIS_MODULE; | |
| 132 | ||
| 1da177e4 LT |
133 | /* No partitioning detected. Use default */ |
| 134 | if (i == 2) { | |
| e062e2f5 DES |
135 | defparts = NULL; |
| 136 | nr_parts = 0; | |
| 1da177e4 | 137 | } else if (i == bigflash) { |
| e062e2f5 DES |
138 | defparts = bigflash_parts; |
| 139 | nr_parts = ARRAY_SIZE(bigflash_parts); | |
| 1da177e4 | 140 | } else { |
| e062e2f5 DES |
141 | defparts = smallflash_parts; |
| 142 | nr_parts = ARRAY_SIZE(smallflash_parts); | |
| 1da177e4 | 143 | } |
| e062e2f5 | 144 | |
| 42d7fbe2 | 145 | mtd_device_parse_register(sbcmtd[i], part_probes, NULL, |
| e062e2f5 | 146 | defparts, nr_parts); |
| 1da177e4 LT |
147 | } |
| 148 | return 0; | |
| 149 | } | |
| 150 | ||
| 151 | static void __exit cleanup_sbc82xx_flash(void) | |
| 152 | { | |
| 153 | int i; | |
| 154 | ||
| 155 | for (i=0; i<3; i++) { | |
| 156 | if (!sbcmtd[i]) | |
| 157 | continue; | |
| 158 | ||
| e062e2f5 | 159 | mtd_device_unregister(sbcmtd[i]); |
| 69f34c98 | 160 | |
| 1da177e4 | 161 | map_destroy(sbcmtd[i]); |
| 69f34c98 | 162 | |
| 1da177e4 LT |
163 | iounmap((void *)sbc82xx_flash_map[i].virt); |
| 164 | sbc82xx_flash_map[i].virt = 0; | |
| 165 | } | |
| 166 | } | |
| 167 | ||
| 168 | module_init(init_sbc82xx_flash); | |
| 169 | module_exit(cleanup_sbc82xx_flash); | |
| 170 | ||
| 171 | ||
| 172 | MODULE_LICENSE("GPL"); | |
| 173 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
| 174 | MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II"); |