1/*
2 * Flash device on Lasat 100 and 200 boards
3 *
4 * (C) 2002 Brian Murphy <brian@murphy.dk>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
9 *
10 * $Id: lasat.c,v 1.1.1.1 2007/08/03 18:52:43 Exp $
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
16#include <linux/kernel.h>
17#include <linux/init.h>
18#include <asm/io.h>
19#include <linux/mtd/mtd.h>
20#include <linux/mtd/map.h>
21#include <linux/mtd/partitions.h>
22#include <asm/lasat/lasat.h>
23
24static struct mtd_info *lasat_mtd;
25
26static struct mtd_partition partition_info[LASAT_MTD_LAST];
27static char *lasat_mtd_partnames[] = {"Bootloader", "Service", "Normal", "Filesystem", "Config"};
28
29static void lasat_set_vpp(struct map_info *map, int vpp)
30{
31	if (vpp)
32	    *lasat_misc->flash_wp_reg |= 1 << lasat_misc->flash_wp_bit;
33	else
34	    *lasat_misc->flash_wp_reg &= ~(1 << lasat_misc->flash_wp_bit);
35}
36
37static struct map_info lasat_map = {
38	.name = "LASAT flash",
39	.bankwidth = 4,
40	.set_vpp = lasat_set_vpp
41};
42
43static int __init init_lasat(void)
44{
45	int i;
46	/* since we use AMD chips and set_vpp is not implimented
47	 * for these (yet) we still have to permanently enable flash write */
48	printk(KERN_NOTICE "Unprotecting flash\n");
49	ENABLE_VPP((&lasat_map));
50
51	lasat_map.phys = lasat_flash_partition_start(LASAT_MTD_BOOTLOADER);
52	lasat_map.virt = (unsigned long)ioremap_nocache(
53		        lasat_map.phys, lasat_board_info.li_flash_size);
54	lasat_map.size = lasat_board_info.li_flash_size;
55
56	simple_map_init(&lasat_map);
57
58	for (i=0; i < LASAT_MTD_LAST; i++)
59		partition_info[i].name = lasat_mtd_partnames[i];
60
61	lasat_mtd = do_map_probe("cfi_probe", &lasat_map);
62
63	if (!lasat_mtd)
64	    lasat_mtd = do_map_probe("jedec_probe", &lasat_map);
65
66	if (lasat_mtd) {
67		u32 size, offset = 0;
68
69		lasat_mtd->owner = THIS_MODULE;
70
71		for (i=0; i < LASAT_MTD_LAST; i++) {
72			size = lasat_flash_partition_size(i);
73			partition_info[i].size = size;
74			partition_info[i].offset = offset;
75			offset += size;
76		}
77
78		add_mtd_partitions( lasat_mtd, partition_info, LASAT_MTD_LAST );
79		return 0;
80	}
81
82	iounmap(lasat_map.virt);
83	return -ENXIO;
84}
85
86static void __exit cleanup_lasat(void)
87{
88	if (lasat_mtd) {
89		del_mtd_partitions(lasat_mtd);
90		map_destroy(lasat_mtd);
91	}
92	if (lasat_map.virt) {
93		iounmap(lasat_map.virt);
94		lasat_map.virt = 0;
95	}
96}
97
98module_init(init_lasat);
99module_exit(cleanup_lasat);
100
101MODULE_LICENSE("GPL");
102MODULE_AUTHOR("Brian Murphy <brian@murphy.dk>");
103MODULE_DESCRIPTION("Lasat Safepipe/Masquerade MTD map driver");
104