1/*
2 * $Id: dbox2-flash.c,v 1.1.1.1 2007/08/03 18:52:43 Exp $
3 *
4 * D-Box 2 flash driver
5 */
6
7#include <linux/module.h>
8#include <linux/types.h>
9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <asm/io.h>
12#include <linux/mtd/mtd.h>
13#include <linux/mtd/map.h>
14#include <linux/mtd/partitions.h>
15#include <linux/errno.h>
16
17/* partition_info gives details on the logical partitions that the split the
18 * single flash device into. If the size if zero we use up to the end of the
19 * device. */
20static struct mtd_partition partition_info[]= {
21	{
22	.name		= "BR bootloader",
23	.size		= 128 * 1024,
24	.offset		= 0,
25	.mask_flags	= MTD_WRITEABLE
26	},
27	{
28	.name		= "FLFS (U-Boot)",
29	.size		= 128 * 1024,
30	.offset		= MTDPART_OFS_APPEND,
31	.mask_flags	= 0
32	},
33	{
34	.name		= "Root (SquashFS)",
35	.size		= 7040 * 1024,
36	.offset		= MTDPART_OFS_APPEND,
37	.mask_flags	= 0
38	},
39	{
40	.name		= "var (JFFS2)",
41	.size		= 896 * 1024,
42	.offset		= MTDPART_OFS_APPEND,
43	.mask_flags	= 0
44	},
45	{
46	.name		= "Flash without bootloader",
47	.size		= MTDPART_SIZ_FULL,
48	.offset		= 128 * 1024,
49	.mask_flags	= 0
50	},
51	{
52	.name		= "Complete Flash",
53	.size		= MTDPART_SIZ_FULL,
54	.offset		= 0,
55	.mask_flags	= MTD_WRITEABLE
56	}
57};
58
59#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
60
61#define WINDOW_ADDR 0x10000000
62#define WINDOW_SIZE 0x800000
63
64static struct mtd_info *mymtd;
65
66
67struct map_info dbox2_flash_map = {
68	.name		= "D-Box 2 flash memory",
69	.size		= WINDOW_SIZE,
70	.bankwidth	= 4,
71	.phys		= WINDOW_ADDR,
72};
73
74int __init init_dbox2_flash(void)
75{
76       	printk(KERN_NOTICE "D-Box 2 flash driver (size->0x%X mem->0x%X)\n", WINDOW_SIZE, WINDOW_ADDR);
77	dbox2_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
78
79	if (!dbox2_flash_map.virt) {
80		printk("Failed to ioremap\n");
81		return -EIO;
82	}
83	simple_map_init(&dbox2_flash_map);
84
85	// Probe for dual Intel 28F320 or dual AMD
86	mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
87	if (!mymtd) {
88	    // Probe for single Intel 28F640
89	    dbox2_flash_map.bankwidth = 2;
90
91	    mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
92	}
93
94	if (mymtd) {
95		mymtd->owner = THIS_MODULE;
96
97                /* Create MTD devices for each partition. */
98	        add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
99
100		return 0;
101	}
102
103	iounmap((void *)dbox2_flash_map.virt);
104	return -ENXIO;
105}
106
107static void __exit cleanup_dbox2_flash(void)
108{
109	if (mymtd) {
110		del_mtd_partitions(mymtd);
111		map_destroy(mymtd);
112	}
113	if (dbox2_flash_map.virt) {
114		iounmap((void *)dbox2_flash_map.virt);
115		dbox2_flash_map.virt = 0;
116	}
117}
118
119module_init(init_dbox2_flash);
120module_exit(cleanup_dbox2_flash);
121
122
123MODULE_LICENSE("GPL");
124MODULE_AUTHOR("K��ri Dav����sson <kd@flaga.is>, Bastian Blank <waldi@tuxbox.org>, Alexander Wild <wild@te-elektronik.com>");
125MODULE_DESCRIPTION("MTD map driver for D-Box 2 board");
126