xref: /openbmc/linux/drivers/mtd/maps/solutionengine.c (revision 3eb66e91a25497065c5322b1268cbc3953642227)
11da177e4SLinus Torvalds /*
21da177e4SLinus Torvalds  * Flash and EPROM on Hitachi Solution Engine and similar boards.
31da177e4SLinus Torvalds  *
41da177e4SLinus Torvalds  * (C) 2001 Red Hat, Inc.
51da177e4SLinus Torvalds  *
61da177e4SLinus Torvalds  * GPL'd
71da177e4SLinus Torvalds  */
81da177e4SLinus Torvalds 
91da177e4SLinus Torvalds #include <linux/module.h>
101da177e4SLinus Torvalds #include <linux/types.h>
111da177e4SLinus Torvalds #include <linux/kernel.h>
121da177e4SLinus Torvalds #include <linux/init.h>
131da177e4SLinus Torvalds #include <asm/io.h>
141da177e4SLinus Torvalds #include <linux/mtd/mtd.h>
151da177e4SLinus Torvalds #include <linux/mtd/map.h>
161da177e4SLinus Torvalds #include <linux/mtd/partitions.h>
171da177e4SLinus Torvalds #include <linux/errno.h>
181da177e4SLinus Torvalds 
191da177e4SLinus Torvalds static struct mtd_info *flash_mtd;
201da177e4SLinus Torvalds static struct mtd_info *eprom_mtd;
211da177e4SLinus Torvalds 
221da177e4SLinus Torvalds struct map_info soleng_eprom_map = {
231da177e4SLinus Torvalds 	.name = "Solution Engine EPROM",
241da177e4SLinus Torvalds 	.size = 0x400000,
251da177e4SLinus Torvalds 	.bankwidth = 4,
261da177e4SLinus Torvalds };
271da177e4SLinus Torvalds 
281da177e4SLinus Torvalds struct map_info soleng_flash_map = {
291da177e4SLinus Torvalds 	.name = "Solution Engine FLASH",
301da177e4SLinus Torvalds 	.size = 0x400000,
311da177e4SLinus Torvalds 	.bankwidth = 4,
321da177e4SLinus Torvalds };
331da177e4SLinus Torvalds 
340984c891SArtem Bityutskiy static const char * const probes[] = { "RedBoot", "cmdlinepart", NULL };
351da177e4SLinus Torvalds 
init_soleng_maps(void)361da177e4SLinus Torvalds static int __init init_soleng_maps(void)
371da177e4SLinus Torvalds {
381da177e4SLinus Torvalds 	/* First probe at offset 0 */
391da177e4SLinus Torvalds 	soleng_flash_map.phys = 0;
401da177e4SLinus Torvalds 	soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0);
411da177e4SLinus Torvalds 	soleng_eprom_map.phys = 0x01000000;
421da177e4SLinus Torvalds 	soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000);
431da177e4SLinus Torvalds 	simple_map_init(&soleng_eprom_map);
441da177e4SLinus Torvalds 	simple_map_init(&soleng_flash_map);
451da177e4SLinus Torvalds 
461da177e4SLinus Torvalds 	printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");
471da177e4SLinus Torvalds 	flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
481da177e4SLinus Torvalds 	if (!flash_mtd) {
491da177e4SLinus Torvalds 		/* Not there. Try swapping */
501da177e4SLinus Torvalds 		printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n");
511da177e4SLinus Torvalds 		soleng_flash_map.phys = 0x01000000;
521da177e4SLinus Torvalds 		soleng_flash_map.virt = P2SEGADDR(0x01000000);
531da177e4SLinus Torvalds 		soleng_eprom_map.phys = 0;
541da177e4SLinus Torvalds 		soleng_eprom_map.virt = P1SEGADDR(0);
551da177e4SLinus Torvalds 		flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
561da177e4SLinus Torvalds 		if (!flash_mtd) {
571da177e4SLinus Torvalds 			/* Eep. */
581da177e4SLinus Torvalds 			printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");
591da177e4SLinus Torvalds 			return -ENXIO;
601da177e4SLinus Torvalds 		}
611da177e4SLinus Torvalds 	}
62*1d25e3eeSRandy Dunlap 	printk(KERN_NOTICE "Solution Engine: Flash at 0x%pap, EPROM at 0x%pap\n",
63*1d25e3eeSRandy Dunlap 	       &soleng_flash_map.phys,
64*1d25e3eeSRandy Dunlap 	       &soleng_eprom_map.phys);
651da177e4SLinus Torvalds 	flash_mtd->owner = THIS_MODULE;
661da177e4SLinus Torvalds 
671da177e4SLinus Torvalds 	eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map);
681da177e4SLinus Torvalds 	if (eprom_mtd) {
691da177e4SLinus Torvalds 		eprom_mtd->owner = THIS_MODULE;
70ee0e87b1SJamie Iles 		mtd_device_register(eprom_mtd, NULL, 0);
711da177e4SLinus Torvalds 	}
721da177e4SLinus Torvalds 
73390e9eacSPaul Bolle 	mtd_device_parse_register(flash_mtd, probes, NULL, NULL, 0);
741da177e4SLinus Torvalds 
751da177e4SLinus Torvalds 	return 0;
761da177e4SLinus Torvalds }
771da177e4SLinus Torvalds 
cleanup_soleng_maps(void)781da177e4SLinus Torvalds static void __exit cleanup_soleng_maps(void)
791da177e4SLinus Torvalds {
801da177e4SLinus Torvalds 	if (eprom_mtd) {
81ee0e87b1SJamie Iles 		mtd_device_unregister(eprom_mtd);
821da177e4SLinus Torvalds 		map_destroy(eprom_mtd);
831da177e4SLinus Torvalds 	}
841da177e4SLinus Torvalds 
85ee0e87b1SJamie Iles 	mtd_device_unregister(flash_mtd);
861da177e4SLinus Torvalds 	map_destroy(flash_mtd);
871da177e4SLinus Torvalds }
881da177e4SLinus Torvalds 
891da177e4SLinus Torvalds module_init(init_soleng_maps);
901da177e4SLinus Torvalds module_exit(cleanup_soleng_maps);
911da177e4SLinus Torvalds 
921da177e4SLinus Torvalds MODULE_LICENSE("GPL");
931da177e4SLinus Torvalds MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
941da177e4SLinus Torvalds MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards");
951da177e4SLinus Torvalds 
96