1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
/*
* Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org>
* Mike Albon <malbon@openwrt.org>
* Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mtd/map.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/vmalloc.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <asm/mach-bcm63xx/bcm963xx_tag.h>
#define BCM63XX_BUSWIDTH 2 /* Buswidth */
#define BCM63XX_EXTENDED_SIZE 0xBFC00000 /* Extended flash address */
static struct mtd_partition *parsed_parts;
static struct mtd_info *bcm963xx_mtd_info;
static struct map_info bcm963xx_map = {
.name = "bcm963xx",
.bankwidth = BCM63XX_BUSWIDTH,
};
static int parse_cfe_partitions(struct mtd_info *master,
struct mtd_partition **pparts)
{
/* CFE, NVRAM and global Linux are always present */
int nrparts = 3, curpart = 0;
struct bcm_tag *buf;
struct mtd_partition *parts;
int ret;
size_t retlen;
unsigned int rootfsaddr, kerneladdr, spareaddr;
unsigned int rootfslen, kernellen, sparelen, totallen;
int namelen = 0;
int i;
char *boardid;
char *tagversion;
/* Allocate memory for buffer */
buf = vmalloc(sizeof(struct bcm_tag));
if (!buf)
return -ENOMEM;
/* Get the tag */
ret = master->read(master, master->erasesize, sizeof(struct bcm_tag),
&retlen, (void *)buf);
if (retlen != sizeof(struct bcm_tag)) {
vfree(buf);
return -EIO;
}
sscanf(buf->kernel_address, "%u", &kerneladdr);
sscanf(buf->kernel_length, "%u", &kernellen);
sscanf(buf->total_length, "%u", &totallen);
tagversion = &(buf->tag_version[0]);
boardid = &(buf->board_id[0]);
pr_info("CFE boot tag found with version %s and board type %s\n",
tagversion, boardid);
kerneladdr = kerneladdr - BCM63XX_EXTENDED_SIZE;
rootfsaddr = kerneladdr + kernellen;
spareaddr = roundup(totallen, master->erasesize) + master->erasesize;
sparelen = master->size - spareaddr - master->erasesize;
rootfslen = spareaddr - rootfsaddr;
/* Determine number of partitions */
namelen = 8;
if (rootfslen > 0) {
nrparts++;
namelen += 6;
}
if (kernellen > 0) {
nrparts++;
namelen += 6;
}
/* Ask kernel for more memory */
parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
if (!parts) {
vfree(buf);
return -ENOMEM;
}
/* Start building partition list */
parts[curpart].name = "CFE";
parts[curpart].offset = 0;
parts[curpart].size = master->erasesize;
curpart++;
if (kernellen > 0) {
parts[curpart].name = "kernel";
parts[curpart].offset = kerneladdr;
parts[curpart].size = kernellen;
curpart++;
}
if (rootfslen > 0) {
parts[curpart].name = "rootfs";
parts[curpart].offset = rootfsaddr;
parts[curpart].size = rootfslen;
if (sparelen > 0)
parts[curpart].size += sparelen;
curpart++;
}
parts[curpart].name = "nvram";
parts[curpart].offset = master->size - master->erasesize;
parts[curpart].size = master->erasesize;
/* Global partition "linux" to make easy firmware upgrade */
curpart++;
parts[curpart].name = "linux";
parts[curpart].offset = parts[0].size;
parts[curpart].size = master->size - parts[0].size - parts[3].size;
for (i = 0; i < nrparts; i++)
pr_info("Partition %d is %s offset %lx and length %lx\n", i,
parts[i].name, (long unsigned int)(parts[i].offset),
(long unsigned int)(parts[i].size));
pr_info("Spare partition is offset %x and length %x\n", spareaddr,
sparelen);
*pparts = parts;
vfree(buf);
return nrparts;
};
static int bcm963xx_detect_cfe(struct mtd_info *master)
{
int idoffset = 0x4e0;
static char idstring[8] = "CFE1CFE1";
char buf[9];
int ret;
size_t retlen;
ret = master->read(master, idoffset, 8, &retlen, (void *)buf);
buf[retlen] = 0;
printk(KERN_INFO PFX "Read Signature value of %s\n", buf);
return strncmp(idstring, buf, 8);
}
static int bcm963xx_probe(struct platform_device *pdev)
{
int err = 0;
int parsed_nr_parts = 0;
char *part_type;
struct resource *r;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r) {
dev_err(&pdev->dev, "no resource supplied\n");
return -ENODEV;
}
bcm963xx_map.phys = r->start;
bcm963xx_map.size = resource_size(r);
bcm963xx_map.virt = ioremap(r->start, resource_size(r));
if (!bcm963xx_map.virt) {
dev_err(&pdev->dev, "failed to ioremap\n");
return -EIO;
}
dev_info(&pdev->dev, "0x%08lx at 0x%08x\n",
bcm963xx_map.size, bcm963xx_map.phys);
simple_map_init(&bcm963xx_map);
bcm963xx_mtd_info = do_map_probe("cfi_probe", &bcm963xx_map);
if (!bcm963xx_mtd_info) {
dev_err(&pdev->dev, "failed to probe using CFI\n");
bcm963xx_mtd_info = do_map_probe("jedec_probe", &bcm963xx_map);
if (bcm963xx_mtd_info)
goto probe_ok;
dev_err(&pdev->dev, "failed to probe using JEDEC\n");
err = -EIO;
goto err_probe;
}
probe_ok:
bcm963xx_mtd_info->owner = THIS_MODULE;
/* This is mutually exclusive */
if (bcm963xx_detect_cfe(bcm963xx_mtd_info) == 0) {
dev_info(&pdev->dev, "CFE bootloader detected\n");
if (parsed_nr_parts == 0) {
int ret = parse_cfe_partitions(bcm963xx_mtd_info,
&parsed_parts);
if (ret > 0) {
part_type = "CFE";
parsed_nr_parts = ret;
}
}
} else {
dev_info(&pdev->dev, "unsupported bootloader\n");
err = -ENODEV;
goto err_probe;
}
return mtd_device_register(bcm963xx_mtd_info, parsed_parts,
parsed_nr_parts);
err_probe:
iounmap(bcm963xx_map.virt);
return err;
}
static int bcm963xx_remove(struct platform_device *pdev)
{
if (bcm963xx_mtd_info) {
mtd_device_unregister(bcm963xx_mtd_info);
map_destroy(bcm963xx_mtd_info);
}
if (bcm963xx_map.virt) {
iounmap(bcm963xx_map.virt);
bcm963xx_map.virt = 0;
}
return 0;
}
static struct platform_driver bcm63xx_mtd_dev = {
.probe = bcm963xx_probe,
.remove = bcm963xx_remove,
.driver = {
.name = "bcm963xx-flash",
.owner = THIS_MODULE,
},
};
module_platform_driver(bcm63xx_mtd_dev);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Broadcom BCM63xx MTD driver for CFE and RedBoot");
MODULE_AUTHOR("Daniel Dickinson <openwrt@cshore.neomailbox.net>");
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>");
|
