1/* 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> 18#include <linux/mtd/partitions.h> 19 20#include <asm/immap_cpm2.h> 21 22static struct mtd_info *sbcmtd[3]; 23 24struct map_info sbc82xx_flash_map[3] = { 25 {.name = "Boot flash"}, 26 {.name = "Alternate boot flash"}, 27 {.name = "User flash"} 28}; 29 30static 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 42static 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 62static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; 63 64#define init_sbc82xx_one_flash(map, br, or) \ 65do { \ 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 76static int __init init_sbc82xx_flash(void) 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; 103 struct mtd_partition *defparts; 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); 115 116 sbc82xx_flash_map[i].virt = ioremap(sbc82xx_flash_map[i].phys, 117 sbc82xx_flash_map[i].size); 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; 132 133 /* No partitioning detected. Use default */ 134 if (i == 2) { 135 defparts = NULL; 136 nr_parts = 0; 137 } else if (i == bigflash) { 138 defparts = bigflash_parts; 139 nr_parts = ARRAY_SIZE(bigflash_parts); 140 } else { 141 defparts = smallflash_parts; 142 nr_parts = ARRAY_SIZE(smallflash_parts); 143 } 144 145 mtd_device_parse_register(sbcmtd[i], part_probes, 0, 146 defparts, nr_parts); 147 } 148 return 0; 149} 150 151static void __exit cleanup_sbc82xx_flash(void) 152{ 153 int i; 154 155 for (i=0; i<3; i++) { 156 if (!sbcmtd[i]) 157 continue; 158 159 mtd_device_unregister(sbcmtd[i]); 160 161 map_destroy(sbcmtd[i]); 162 163 iounmap((void *)sbc82xx_flash_map[i].virt); 164 sbc82xx_flash_map[i].virt = 0; 165 } 166} 167 168module_init(init_sbc82xx_flash); 169module_exit(cleanup_sbc82xx_flash); 170 171 172MODULE_LICENSE("GPL"); 173MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); 174MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II"); 175