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- /*
- * 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/mtd/partitions.h>
- #include <asm/immap_cpm2.h>
- static struct mtd_info *sbcmtd[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);
- static 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;
- struct mtd_partition *defparts;
- 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;
- /* No partitioning detected. Use default */
- if (i == 2) {
- defparts = NULL;
- nr_parts = 0;
- } else if (i == bigflash) {
- defparts = bigflash_parts;
- nr_parts = ARRAY_SIZE(bigflash_parts);
- } else {
- defparts = smallflash_parts;
- nr_parts = ARRAY_SIZE(smallflash_parts);
- }
- mtd_device_parse_register(sbcmtd[i], part_probes, NULL,
- defparts, nr_parts);
- }
- return 0;
- }
- static void __exit cleanup_sbc82xx_flash(void)
- {
- int i;
- for (i=0; i<3; i++) {
- if (!sbcmtd[i])
- continue;
- mtd_device_unregister(sbcmtd[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");
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