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]; 23static struct mtd_partition *sbcmtd_parts[3]; 24 25struct map_info sbc82xx_flash_map[3] = { 26 {.name = "Boot flash"}, 27 {.name = "Alternate boot flash"}, 28 {.name = "User flash"} 29}; 30 31static struct mtd_partition smallflash_parts[] = { 32 { 33 .name = "space", 34 .size = 0x100000, 35 .offset = 0, 36 }, { 37 .name = "bootloader", 38 .size = MTDPART_SIZ_FULL, 39 .offset = MTDPART_OFS_APPEND, 40 } 41}; 42 43static struct mtd_partition bigflash_parts[] = { 44 { 45 .name = "bootloader", 46 .size = 0x00100000, 47 .offset = 0, 48 }, { 49 .name = "file system", 50 .size = 0x01f00000, 51 .offset = MTDPART_OFS_APPEND, 52 }, { 53 .name = "boot config", 54 .size = 0x00100000, 55 .offset = MTDPART_OFS_APPEND, 56 }, { 57 .name = "space", 58 .size = 0x01f00000, 59 .offset = MTDPART_OFS_APPEND, 60 } 61}; 62 63static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; 64 65#define init_sbc82xx_one_flash(map, br, or) \ 66do { \ 67 (map).phys = (br & 1) ? (br & 0xffff8000) : 0; \ 68 (map).size = (br & 1) ? (~(or & 0xffff8000) + 1) : 0; \ 69 switch (br & 0x00001800) { \ 70 case 0x00000000: \ 71 case 0x00000800: (map).bankwidth = 1; break; \ 72 case 0x00001000: (map).bankwidth = 2; break; \ 73 case 0x00001800: (map).bankwidth = 4; break; \ 74 } \ 75} while (0); 76 77static int __init init_sbc82xx_flash(void) 78{ 79 volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl; 80 int bigflash; 81 int i; 82 83#ifdef CONFIG_SBC8560 84 mc = ioremap(0xff700000 + 0x5000, sizeof(memctl_cpm2_t)); 85#else 86 mc = &cpm2_immr->im_memctl; 87#endif 88 89 bigflash = 1; 90 if ((mc->memc_br0 & 0x00001800) == 0x00001800) 91 bigflash = 0; 92 93 init_sbc82xx_one_flash(sbc82xx_flash_map[0], mc->memc_br0, mc->memc_or0); 94 init_sbc82xx_one_flash(sbc82xx_flash_map[1], mc->memc_br6, mc->memc_or6); 95 init_sbc82xx_one_flash(sbc82xx_flash_map[2], mc->memc_br1, mc->memc_or1); 96 97#ifdef CONFIG_SBC8560 98 iounmap((void *) mc); 99#endif 100 101 for (i=0; i<3; i++) { 102 int8_t flashcs[3] = { 0, 6, 1 }; 103 int nr_parts; 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, sbc82xx_flash_map[i].size); 117 118 if (!sbc82xx_flash_map[i].virt) { 119 printk("Failed to ioremap\n"); 120 continue; 121 } 122 123 simple_map_init(&sbc82xx_flash_map[i]); 124 125 sbcmtd[i] = do_map_probe("cfi_probe", &sbc82xx_flash_map[i]); 126 127 if (!sbcmtd[i]) 128 continue; 129 130 sbcmtd[i]->owner = THIS_MODULE; 131 132 nr_parts = parse_mtd_partitions(sbcmtd[i], part_probes, 133 &sbcmtd_parts[i], 0); 134 if (nr_parts > 0) { 135 add_mtd_partitions (sbcmtd[i], sbcmtd_parts[i], nr_parts); 136 continue; 137 } 138 139 /* No partitioning detected. Use default */ 140 if (i == 2) { 141 add_mtd_device(sbcmtd[i]); 142 } else if (i == bigflash) { 143 add_mtd_partitions (sbcmtd[i], bigflash_parts, ARRAY_SIZE(bigflash_parts)); 144 } else { 145 add_mtd_partitions (sbcmtd[i], smallflash_parts, ARRAY_SIZE(smallflash_parts)); 146 } 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 if (i<2 || sbcmtd_parts[i]) 160 del_mtd_partitions(sbcmtd[i]); 161 else 162 del_mtd_device(sbcmtd[i]); 163 164 kfree(sbcmtd_parts[i]); 165 map_destroy(sbcmtd[i]); 166 167 iounmap((void *)sbc82xx_flash_map[i].virt); 168 sbc82xx_flash_map[i].virt = 0; 169 } 170} 171 172module_init(init_sbc82xx_flash); 173module_exit(cleanup_sbc82xx_flash); 174 175 176MODULE_LICENSE("GPL"); 177MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); 178MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II"); 179