/* * $Id: wr_sbc82xx_flash.c,v 1.7 2004/11/04 13:24:15 gleixner Exp $ * * Map for flash chips on Wind River PowerQUICC II SBC82xx board. * * Copyright (C) 2004 Red Hat, Inc. * * Author: David Woodhouse <dwmw2@infradead.org> * */ #include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/slab.h> #include <asm/io.h> #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> #include <linux/config.h> #include <linux/mtd/partitions.h> #include <asm/immap_cpm2.h> static struct mtd_info *sbcmtd[3]; static struct mtd_partition *sbcmtd_parts[3]; struct map_info sbc82xx_flash_map[3] = { {.name = "Boot flash"}, {.name = "Alternate boot flash"}, {.name = "User flash"} }; static struct mtd_partition smallflash_parts[] = { { .name = "space", .size = 0x100000, .offset = 0, }, { .name = "bootloader", .size = MTDPART_SIZ_FULL, .offset = MTDPART_OFS_APPEND, } }; static struct mtd_partition bigflash_parts[] = { { .name = "bootloader", .size = 0x00100000, .offset = 0, }, { .name = "file system", .size = 0x01f00000, .offset = MTDPART_OFS_APPEND, }, { .name = "boot config", .size = 0x00100000, .offset = MTDPART_OFS_APPEND, }, { .name = "space", .size = 0x01f00000, .offset = MTDPART_OFS_APPEND, } }; static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; #define init_sbc82xx_one_flash(map, br, or) \ do { \ (map).phys = (br & 1) ? (br & 0xffff8000) : 0; \ (map).size = (br & 1) ? (~(or & 0xffff8000) + 1) : 0; \ switch (br & 0x00001800) { \ case 0x00000000: \ case 0x00000800: (map).bankwidth = 1; break; \ case 0x00001000: (map).bankwidth = 2; break; \ case 0x00001800: (map).bankwidth = 4; break; \ } \ } while (0); int __init init_sbc82xx_flash(void) { volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl; int bigflash; int i; #ifdef CONFIG_SBC8560 mc = ioremap(0xff700000 + 0x5000, sizeof(memctl_cpm2_t)); #else mc = &cpm2_immr->im_memctl; #endif bigflash = 1; if ((mc->memc_br0 & 0x00001800) == 0x00001800) bigflash = 0; init_sbc82xx_one_flash(sbc82xx_flash_map[0], mc->memc_br0, mc->memc_or0); init_sbc82xx_one_flash(sbc82xx_flash_map[1], mc->memc_br6, mc->memc_or6); init_sbc82xx_one_flash(sbc82xx_flash_map[2], mc->memc_br1, mc->memc_or1); #ifdef CONFIG_SBC8560 iounmap((void *) mc); #endif for (i=0; i<3; i++) { int8_t flashcs[3] = { 0, 6, 1 }; int nr_parts; printk(KERN_NOTICE "PowerQUICC II %s (%ld MiB on CS%d", sbc82xx_flash_map[i].name, (sbc82xx_flash_map[i].size >> 20), flashcs[i]); if (!sbc82xx_flash_map[i].phys) { /* We know it can't be at zero. */ printk("): disabled by bootloader.\n"); continue; } printk(" at %08lx)\n", sbc82xx_flash_map[i].phys); sbc82xx_flash_map[i].virt = ioremap(sbc82xx_flash_map[i].phys, sbc82xx_flash_map[i].size); if (!sbc82xx_flash_map[i].virt) { printk("Failed to ioremap\n"); continue; } simple_map_init(&sbc82xx_flash_map[i]); sbcmtd[i] = do_map_probe("cfi_probe", &sbc82xx_flash_map[i]); if (!sbcmtd[i]) continue; sbcmtd[i]->owner = THIS_MODULE; nr_parts = parse_mtd_partitions(sbcmtd[i], part_probes, &sbcmtd_parts[i], 0); if (nr_parts > 0) { add_mtd_partitions (sbcmtd[i], sbcmtd_parts[i], nr_parts); continue; } /* No partitioning detected. Use default */ if (i == 2) { add_mtd_device(sbcmtd[i]); } else if (i == bigflash) { add_mtd_partitions (sbcmtd[i], bigflash_parts, ARRAY_SIZE(bigflash_parts)); } else { add_mtd_partitions (sbcmtd[i], smallflash_parts, ARRAY_SIZE(smallflash_parts)); } } return 0; } static void __exit cleanup_sbc82xx_flash(void) { int i; for (i=0; i<3; i++) { if (!sbcmtd[i]) continue; if (i<2 || sbcmtd_parts[i]) del_mtd_partitions(sbcmtd[i]); else del_mtd_device(sbcmtd[i]); kfree(sbcmtd_parts[i]); map_destroy(sbcmtd[i]); iounmap((void *)sbc82xx_flash_map[i].virt); sbc82xx_flash_map[i].virt = 0; } } module_init(init_sbc82xx_flash); module_exit(cleanup_sbc82xx_flash); MODULE_LICENSE("GPL"); MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II");