tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 1.9 2004/11/04 13:24:15 gleixner 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 <linux/config.h>
23#include <asm/lasat/lasat.h>
24
25static struct mtd_info *lasat_mtd;
26
27static struct mtd_partition partition_info[LASAT_MTD_LAST];
28static char *lasat_mtd_partnames[] = {"Bootloader", "Service", "Normal", "Filesystem", "Config"};
29
30static void lasat_set_vpp(struct map_info *map, int vpp)
31{
32 if (vpp)
33 *lasat_misc->flash_wp_reg |= 1 << lasat_misc->flash_wp_bit;
34 else
35 *lasat_misc->flash_wp_reg &= ~(1 << lasat_misc->flash_wp_bit);
36}
37
38static struct map_info lasat_map = {
39 .name = "LASAT flash",
40 .bankwidth = 4,
41 .set_vpp = lasat_set_vpp
42};
43
44static int __init init_lasat(void)
45{
46 int i;
47 /* since we use AMD chips and set_vpp is not implimented
48 * for these (yet) we still have to permanently enable flash write */
49 printk(KERN_NOTICE "Unprotecting flash\n");
50 ENABLE_VPP((&lasat_map));
51
52 lasat_map.phys = lasat_flash_partition_start(LASAT_MTD_BOOTLOADER);
53 lasat_map.virt = ioremap_nocache(
54 lasat_map.phys, lasat_board_info.li_flash_size);
55 lasat_map.size = lasat_board_info.li_flash_size;
56
57 simple_map_init(&lasat_map);
58
59 for (i=0; i < LASAT_MTD_LAST; i++)
60 partition_info[i].name = lasat_mtd_partnames[i];
61
62 lasat_mtd = do_map_probe("cfi_probe", &lasat_map);
63
64 if (!lasat_mtd)
65 lasat_mtd = do_map_probe("jedec_probe", &lasat_map);
66
67 if (lasat_mtd) {
68 u32 size, offset = 0;
69
70 lasat_mtd->owner = THIS_MODULE;
71
72 for (i=0; i < LASAT_MTD_LAST; i++) {
73 size = lasat_flash_partition_size(i);
74 partition_info[i].size = size;
75 partition_info[i].offset = offset;
76 offset += size;
77 }
78
79 add_mtd_partitions( lasat_mtd, partition_info, LASAT_MTD_LAST );
80 return 0;
81 }
82
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 lasat_map.virt = 0;
94 }
95}
96
97module_init(init_lasat);
98module_exit(cleanup_lasat);
99
100MODULE_LICENSE("GPL");
101MODULE_AUTHOR("Brian Murphy <brian@murphy.dk>");
102MODULE_DESCRIPTION("Lasat Safepipe/Masquerade MTD map driver");