2 * $Id: solutionengine.c,v 1.15 2005/11/07 11:14:28 gleixner Exp $
4 * Flash and EPROM on Hitachi Solution Engine and similar boards.
6 * (C) 2001 Red Hat, Inc.
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
16 #include <linux/mtd/mtd.h>
17 #include <linux/mtd/map.h>
18 #include <linux/mtd/partitions.h>
19 #include <linux/config.h>
20 #include <linux/errno.h>
22 static struct mtd_info *flash_mtd;
23 static struct mtd_info *eprom_mtd;
25 static struct mtd_partition *parsed_parts;
27 struct map_info soleng_eprom_map = {
28 .name = "Solution Engine EPROM",
33 struct map_info soleng_flash_map = {
34 .name = "Solution Engine FLASH",
39 static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
41 #ifdef CONFIG_MTD_SUPERH_RESERVE
42 static struct mtd_partition superh_se_partitions[] = {
43 /* Reserved for boot code, read-only */
47 .size = CONFIG_MTD_SUPERH_RESERVE,
48 .mask_flags = MTD_WRITEABLE,
50 /* All else is writable (e.g. JFFS) */
53 .offset = MTDPART_OFS_NXTBLK,
54 .size = MTDPART_SIZ_FULL,
57 #endif /* CONFIG_MTD_SUPERH_RESERVE */
59 static int __init init_soleng_maps(void)
63 /* First probe at offset 0 */
64 soleng_flash_map.phys = 0;
65 soleng_flash_map.virt = (void __iomem *)P2SEGADDR(0);
66 soleng_eprom_map.phys = 0x01000000;
67 soleng_eprom_map.virt = (void __iomem *)P1SEGADDR(0x01000000);
68 simple_map_init(&soleng_eprom_map);
69 simple_map_init(&soleng_flash_map);
71 printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");
72 flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
74 /* Not there. Try swapping */
75 printk(KERN_NOTICE "Probing for flash chips at 0x01000000:\n");
76 soleng_flash_map.phys = 0x01000000;
77 soleng_flash_map.virt = P2SEGADDR(0x01000000);
78 soleng_eprom_map.phys = 0;
79 soleng_eprom_map.virt = P1SEGADDR(0);
80 flash_mtd = do_map_probe("cfi_probe", &soleng_flash_map);
83 printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");
87 printk(KERN_NOTICE "Solution Engine: Flash at 0x%08lx, EPROM at 0x%08lx\n",
88 soleng_flash_map.phys & 0x1fffffff,
89 soleng_eprom_map.phys & 0x1fffffff);
90 flash_mtd->owner = THIS_MODULE;
92 eprom_mtd = do_map_probe("map_rom", &soleng_eprom_map);
94 eprom_mtd->owner = THIS_MODULE;
95 add_mtd_device(eprom_mtd);
98 nr_parts = parse_mtd_partitions(flash_mtd, probes, &parsed_parts, 0);
100 #ifdef CONFIG_MTD_SUPERH_RESERVE
102 printk(KERN_NOTICE "Using configured partition at 0x%08x.\n",
103 CONFIG_MTD_SUPERH_RESERVE);
104 parsed_parts = superh_se_partitions;
105 nr_parts = sizeof(superh_se_partitions)/sizeof(*parsed_parts);
107 #endif /* CONFIG_MTD_SUPERH_RESERVE */
110 add_mtd_partitions(flash_mtd, parsed_parts, nr_parts);
112 add_mtd_device(flash_mtd);
117 static void __exit cleanup_soleng_maps(void)
120 del_mtd_device(eprom_mtd);
121 map_destroy(eprom_mtd);
125 del_mtd_partitions(flash_mtd);
127 del_mtd_device(flash_mtd);
128 map_destroy(flash_mtd);
131 module_init(init_soleng_maps);
132 module_exit(cleanup_soleng_maps);
134 MODULE_LICENSE("GPL");
135 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
136 MODULE_DESCRIPTION("MTD map driver for Hitachi SolutionEngine (and similar) boards");