diff options
Diffstat (limited to 'linux-2.4.x/drivers/mtd/maps/wr_sbc82xx_flash.c')
| -rw-r--r-- | linux-2.4.x/drivers/mtd/maps/wr_sbc82xx_flash.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/linux-2.4.x/drivers/mtd/maps/wr_sbc82xx_flash.c b/linux-2.4.x/drivers/mtd/maps/wr_sbc82xx_flash.c new file mode 100644 index 0000000..60c197e --- /dev/null +++ b/linux-2.4.x/drivers/mtd/maps/wr_sbc82xx_flash.c @@ -0,0 +1,181 @@ +/* + * $Id: wr_sbc82xx_flash.c,v 1.8 2005/11/07 11:14:29 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"); |