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![Jörn Engel](/assets/img/avatar_default.png)
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
180 lines
4.1 KiB
C
180 lines
4.1 KiB
C
/*
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* $Id: wr_sbc82xx_flash.c,v 1.8 2005/11/07 11:14:29 gleixner Exp $
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*
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* Map for flash chips on Wind River PowerQUICC II SBC82xx board.
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*
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* Copyright (C) 2004 Red Hat, Inc.
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*
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* Author: David Woodhouse <dwmw2@infradead.org>
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*
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#include <asm/immap_cpm2.h>
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static struct mtd_info *sbcmtd[3];
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static struct mtd_partition *sbcmtd_parts[3];
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struct map_info sbc82xx_flash_map[3] = {
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{.name = "Boot flash"},
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{.name = "Alternate boot flash"},
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{.name = "User flash"}
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};
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static struct mtd_partition smallflash_parts[] = {
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{
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.name = "space",
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.size = 0x100000,
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.offset = 0,
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}, {
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.name = "bootloader",
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.size = MTDPART_SIZ_FULL,
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.offset = MTDPART_OFS_APPEND,
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}
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};
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static struct mtd_partition bigflash_parts[] = {
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{
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.name = "bootloader",
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.size = 0x00100000,
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.offset = 0,
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}, {
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.name = "file system",
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.size = 0x01f00000,
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.offset = MTDPART_OFS_APPEND,
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}, {
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.name = "boot config",
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.size = 0x00100000,
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.offset = MTDPART_OFS_APPEND,
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}, {
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.name = "space",
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.size = 0x01f00000,
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.offset = MTDPART_OFS_APPEND,
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}
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};
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static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL};
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#define init_sbc82xx_one_flash(map, br, or) \
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do { \
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(map).phys = (br & 1) ? (br & 0xffff8000) : 0; \
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(map).size = (br & 1) ? (~(or & 0xffff8000) + 1) : 0; \
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switch (br & 0x00001800) { \
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case 0x00000000: \
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case 0x00000800: (map).bankwidth = 1; break; \
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case 0x00001000: (map).bankwidth = 2; break; \
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case 0x00001800: (map).bankwidth = 4; break; \
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} \
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} while (0);
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int __init init_sbc82xx_flash(void)
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{
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volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl;
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int bigflash;
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int i;
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#ifdef CONFIG_SBC8560
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mc = ioremap(0xff700000 + 0x5000, sizeof(memctl_cpm2_t));
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#else
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mc = &cpm2_immr->im_memctl;
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#endif
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bigflash = 1;
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if ((mc->memc_br0 & 0x00001800) == 0x00001800)
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bigflash = 0;
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init_sbc82xx_one_flash(sbc82xx_flash_map[0], mc->memc_br0, mc->memc_or0);
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init_sbc82xx_one_flash(sbc82xx_flash_map[1], mc->memc_br6, mc->memc_or6);
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init_sbc82xx_one_flash(sbc82xx_flash_map[2], mc->memc_br1, mc->memc_or1);
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#ifdef CONFIG_SBC8560
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iounmap((void *) mc);
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#endif
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for (i=0; i<3; i++) {
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int8_t flashcs[3] = { 0, 6, 1 };
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int nr_parts;
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printk(KERN_NOTICE "PowerQUICC II %s (%ld MiB on CS%d",
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sbc82xx_flash_map[i].name,
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(sbc82xx_flash_map[i].size >> 20),
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flashcs[i]);
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if (!sbc82xx_flash_map[i].phys) {
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/* We know it can't be at zero. */
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printk("): disabled by bootloader.\n");
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continue;
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}
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printk(" at %08lx)\n", sbc82xx_flash_map[i].phys);
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sbc82xx_flash_map[i].virt = ioremap(sbc82xx_flash_map[i].phys, sbc82xx_flash_map[i].size);
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if (!sbc82xx_flash_map[i].virt) {
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printk("Failed to ioremap\n");
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continue;
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}
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simple_map_init(&sbc82xx_flash_map[i]);
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sbcmtd[i] = do_map_probe("cfi_probe", &sbc82xx_flash_map[i]);
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if (!sbcmtd[i])
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continue;
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sbcmtd[i]->owner = THIS_MODULE;
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nr_parts = parse_mtd_partitions(sbcmtd[i], part_probes,
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&sbcmtd_parts[i], 0);
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if (nr_parts > 0) {
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add_mtd_partitions (sbcmtd[i], sbcmtd_parts[i], nr_parts);
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continue;
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}
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/* No partitioning detected. Use default */
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if (i == 2) {
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add_mtd_device(sbcmtd[i]);
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} else if (i == bigflash) {
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add_mtd_partitions (sbcmtd[i], bigflash_parts, ARRAY_SIZE(bigflash_parts));
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} else {
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add_mtd_partitions (sbcmtd[i], smallflash_parts, ARRAY_SIZE(smallflash_parts));
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}
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}
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return 0;
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}
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static void __exit cleanup_sbc82xx_flash(void)
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{
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int i;
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for (i=0; i<3; i++) {
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if (!sbcmtd[i])
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continue;
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if (i<2 || sbcmtd_parts[i])
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del_mtd_partitions(sbcmtd[i]);
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else
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del_mtd_device(sbcmtd[i]);
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kfree(sbcmtd_parts[i]);
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map_destroy(sbcmtd[i]);
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iounmap((void *)sbc82xx_flash_map[i].virt);
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sbc82xx_flash_map[i].virt = 0;
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}
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}
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module_init(init_sbc82xx_flash);
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module_exit(cleanup_sbc82xx_flash);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
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MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II");
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