2
* Mapping of a custom board with both AMD CFI and JEDEC flash in partitions.
3
* Config with both CFI and JEDEC device support.
5
* Basically physmap.c with the addition of partitions and
6
* an array of mapping info to accommodate more than one flash type per board.
8
* Copyright 2005-2007 PMC-Sierra, Inc.
10
* This program is free software; you can redistribute it and/or modify it
11
* under the terms of the GNU General Public License as published by the
12
* Free Software Foundation; either version 2 of the License, or (at your
13
* option) any later version.
15
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
16
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
17
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
18
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
21
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
22
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
* You should have received a copy of the GNU General Public License along
27
* with this program; if not, write to the Free Software Foundation, Inc.,
28
* 675 Mass Ave, Cambridge, MA 02139, USA.
31
#include <linux/slab.h>
32
#include <linux/module.h>
33
#include <linux/types.h>
34
#include <linux/kernel.h>
35
#include <linux/mtd/mtd.h>
36
#include <linux/mtd/map.h>
37
#include <linux/mtd/partitions.h>
45
static struct mtd_info **msp_flash;
46
static struct mtd_partition **msp_parts;
47
static struct map_info *msp_maps;
50
#define DEBUG_MARKER printk(KERN_NOTICE "%s[%d]\n", __func__, __LINE__)
52
static int __init init_msp_flash(void)
54
int i, j, ret = -ENOMEM;
58
char flash_name[] = "flash0";
59
char part_name[] = "flash0_0";
62
/* If ELB is disabled by "ful-mux" mode, we can't get at flash */
63
if ((*DEV_ID_REG & DEV_ID_SINGLE_PC) &&
64
(*ELB_1PC_EN_REG & SINGLE_PCCARD)) {
65
printk(KERN_NOTICE "Single PC Card mode: no flash access\n");
69
/* examine the prom environment for flash devices */
70
for (fcnt = 0; (env = prom_getenv(flash_name)); fcnt++)
71
flash_name[5] = '0' + fcnt + 1;
76
printk(KERN_NOTICE "Found %d PMC flash devices\n", fcnt);
78
msp_flash = kmalloc(fcnt * sizeof(struct map_info *), GFP_KERNEL);
82
msp_parts = kmalloc(fcnt * sizeof(struct mtd_partition *), GFP_KERNEL);
86
msp_maps = kcalloc(fcnt, sizeof(struct mtd_info), GFP_KERNEL);
90
/* loop over the flash devices, initializing each */
91
for (i = 0; i < fcnt; i++) {
92
/* examine the prom environment for flash partititions */
93
part_name[5] = '0' + i;
95
for (pcnt = 0; (env = prom_getenv(part_name)); pcnt++)
96
part_name[7] = '0' + pcnt + 1;
99
printk(KERN_NOTICE "Skipping flash device %d "
100
"(no partitions defined)\n", i);
104
msp_parts[i] = kcalloc(pcnt, sizeof(struct mtd_partition),
109
/* now initialize the devices proper */
110
flash_name[5] = '0' + i;
111
env = prom_getenv(flash_name);
113
if (sscanf(env, "%x:%x", &addr, &size) < 2) {
118
addr = CPHYSADDR(addr);
121
"MSP flash device \"%s\": 0x%08x at 0x%08x\n",
122
flash_name, size, addr);
123
/* This must matchs the actual size of the flash chip */
124
msp_maps[i].size = size;
125
msp_maps[i].phys = addr;
128
* Platforms have a specific limit of the size of memory
129
* which may be mapped for flash:
131
if (size > CONFIG_MSP_FLASH_MAP_LIMIT)
132
size = CONFIG_MSP_FLASH_MAP_LIMIT;
134
msp_maps[i].virt = ioremap(addr, size);
135
if (msp_maps[i].virt == NULL) {
141
msp_maps[i].bankwidth = 1;
142
msp_maps[i].name = kmalloc(7, GFP_KERNEL);
143
if (!msp_maps[i].name) {
144
iounmap(msp_maps[i].virt);
149
msp_maps[i].name = strncpy(msp_maps[i].name, flash_name, 7);
151
for (j = 0; j < pcnt; j++) {
152
part_name[5] = '0' + i;
153
part_name[7] = '0' + j;
155
env = prom_getenv(part_name);
157
if (sscanf(env, "%x:%x:%n", &offset, &size,
160
kfree(msp_maps[i].name);
161
iounmap(msp_maps[i].virt);
166
msp_parts[i][j].size = size;
167
msp_parts[i][j].offset = offset;
168
msp_parts[i][j].name = env + coff;
171
/* now probe and add the device */
172
simple_map_init(&msp_maps[i]);
173
msp_flash[i] = do_map_probe("cfi_probe", &msp_maps[i]);
175
msp_flash[i]->owner = THIS_MODULE;
176
mtd_device_register(msp_flash[i], msp_parts[i], pcnt);
178
printk(KERN_ERR "map probe failed for flash\n");
180
kfree(msp_maps[i].name);
181
iounmap(msp_maps[i].virt);
191
mtd_device_unregister(msp_flash[i]);
192
map_destroy(msp_flash[i]);
193
kfree(msp_maps[i].name);
194
iounmap(msp_maps[i].virt);
205
static void __exit cleanup_msp_flash(void)
209
for (i = 0; i < fcnt; i++) {
210
mtd_device_unregister(msp_flash[i]);
211
map_destroy(msp_flash[i]);
212
iounmap((void *)msp_maps[i].virt);
214
/* free the memory */
215
kfree(msp_maps[i].name);
224
MODULE_AUTHOR("PMC-Sierra, Inc");
225
MODULE_DESCRIPTION("MTD map driver for PMC-Sierra MSP boards");
226
MODULE_LICENSE("GPL");
228
module_init(init_msp_flash);
229
module_exit(cleanup_msp_flash);