1/* 2 * $Id: wr_sbc82xx_flash.c,v 1.1.1.1 2007/08/03 18:52:44 Exp $ 3 * 4 * Map for flash chips on Wind River PowerQUICC II SBC82xx board. 5 * 6 * Copyright (C) 2004 Red Hat, Inc. 7 * 8 * Author: David Woodhouse <dwmw2@infradead.org> 9 * 10 */ 11 12#include <linux/module.h> 13#include <linux/types.h> 14#include <linux/kernel.h> 15#include <linux/init.h> 16#include <linux/slab.h> 17#include <asm/io.h> 18#include <linux/mtd/mtd.h> 19#include <linux/mtd/map.h> 20#include <linux/mtd/partitions.h> 21 22#include <asm/immap_cpm2.h> 23 24static struct mtd_info *sbcmtd[3]; 25static struct mtd_partition *sbcmtd_parts[3]; 26 27struct map_info sbc82xx_flash_map[3] = { 28 {.name = "Boot flash"}, 29 {.name = "Alternate boot flash"}, 30 {.name = "User flash"} 31}; 32 33static struct mtd_partition smallflash_parts[] = { 34 { 35 .name = "space", 36 .size = 0x100000, 37 .offset = 0, 38 }, { 39 .name = "bootloader", 40 .size = MTDPART_SIZ_FULL, 41 .offset = MTDPART_OFS_APPEND, 42 } 43}; 44 45static struct mtd_partition bigflash_parts[] = { 46 { 47 .name = "bootloader", 48 .size = 0x00100000, 49 .offset = 0, 50 }, { 51 .name = "file system", 52 .size = 0x01f00000, 53 .offset = MTDPART_OFS_APPEND, 54 }, { 55 .name = "boot config", 56 .size = 0x00100000, 57 .offset = MTDPART_OFS_APPEND, 58 }, { 59 .name = "space", 60 .size = 0x01f00000, 61 .offset = MTDPART_OFS_APPEND, 62 } 63}; 64 65static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; 66 67#define init_sbc82xx_one_flash(map, br, or) \ 68do { \ 69 (map).phys = (br & 1) ? (br & 0xffff8000) : 0; \ 70 (map).size = (br & 1) ? (~(or & 0xffff8000) + 1) : 0; \ 71 switch (br & 0x00001800) { \ 72 case 0x00000000: \ 73 case 0x00000800: (map).bankwidth = 1; break; \ 74 case 0x00001000: (map).bankwidth = 2; break; \ 75 case 0x00001800: (map).bankwidth = 4; break; \ 76 } \ 77} while (0); 78 79int __init init_sbc82xx_flash(void) 80{ 81 volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl; 82 int bigflash; 83 int i; 84 85#ifdef CONFIG_SBC8560 86 mc = ioremap(0xff700000 + 0x5000, sizeof(memctl_cpm2_t)); 87#else 88 mc = &cpm2_immr->im_memctl; 89#endif 90 91 bigflash = 1; 92 if ((mc->memc_br0 & 0x00001800) == 0x00001800) 93 bigflash = 0; 94 95 init_sbc82xx_one_flash(sbc82xx_flash_map[0], mc->memc_br0, mc->memc_or0); 96 init_sbc82xx_one_flash(sbc82xx_flash_map[1], mc->memc_br6, mc->memc_or6); 97 init_sbc82xx_one_flash(sbc82xx_flash_map[2], mc->memc_br1, mc->memc_or1); 98 99#ifdef CONFIG_SBC8560 100 iounmap((void *) mc); 101#endif 102 103 for (i=0; i<3; i++) { 104 int8_t flashcs[3] = { 0, 6, 1 }; 105 int nr_parts; 106 107 printk(KERN_NOTICE "PowerQUICC II %s (%ld MiB on CS%d", 108 sbc82xx_flash_map[i].name, 109 (sbc82xx_flash_map[i].size >> 20), 110 flashcs[i]); 111 if (!sbc82xx_flash_map[i].phys) { 112 /* We know it can't be at zero. */ 113 printk("): disabled by bootloader.\n"); 114 continue; 115 } 116 printk(" at %08lx)\n", sbc82xx_flash_map[i].phys); 117 118 sbc82xx_flash_map[i].virt = ioremap(sbc82xx_flash_map[i].phys, sbc82xx_flash_map[i].size); 119 120 if (!sbc82xx_flash_map[i].virt) { 121 printk("Failed to ioremap\n"); 122 continue; 123 } 124 125 simple_map_init(&sbc82xx_flash_map[i]); 126 127 sbcmtd[i] = do_map_probe("cfi_probe", &sbc82xx_flash_map[i]); 128 129 if (!sbcmtd[i]) 130 continue; 131 132 sbcmtd[i]->owner = THIS_MODULE; 133 134 nr_parts = parse_mtd_partitions(sbcmtd[i], part_probes, 135 &sbcmtd_parts[i], 0); 136 if (nr_parts > 0) { 137 add_mtd_partitions (sbcmtd[i], sbcmtd_parts[i], nr_parts); 138 continue; 139 } 140 141 /* No partitioning detected. Use default */ 142 if (i == 2) { 143 add_mtd_device(sbcmtd[i]); 144 } else if (i == bigflash) { 145 add_mtd_partitions (sbcmtd[i], bigflash_parts, ARRAY_SIZE(bigflash_parts)); 146 } else { 147 add_mtd_partitions (sbcmtd[i], smallflash_parts, ARRAY_SIZE(smallflash_parts)); 148 } 149 } 150 return 0; 151} 152 153static void __exit cleanup_sbc82xx_flash(void) 154{ 155 int i; 156 157 for (i=0; i<3; i++) { 158 if (!sbcmtd[i]) 159 continue; 160 161 if (i<2 || sbcmtd_parts[i]) 162 del_mtd_partitions(sbcmtd[i]); 163 else 164 del_mtd_device(sbcmtd[i]); 165 166 kfree(sbcmtd_parts[i]); 167 map_destroy(sbcmtd[i]); 168 169 iounmap((void *)sbc82xx_flash_map[i].virt); 170 sbc82xx_flash_map[i].virt = 0; 171 } 172} 173 174module_init(init_sbc82xx_flash); 175module_exit(cleanup_sbc82xx_flash); 176 177 178MODULE_LICENSE("GPL"); 179MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); 180MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II"); 181