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authorMarc St-Jean <stjeanma@pmc-sierra.com>2007-03-27 01:45:41 -0400
committerDavid Woodhouse <dwmw2@infradead.org>2007-04-02 14:10:58 -0400
commit68aa0fa87f6d4b2f5e8ad39ecaec8bba9137bb3d (patch)
tree0a80a878bb011dc6e808815cf08a6b9ad3453d68 /drivers/mtd/maps/pmcmsp-flash.c
parent9333907084da2b05db787dba3e714d0be7c84f36 (diff)
[MTD] PMC MSP71xx flash/rootfs mappings
Add flash and rootfs mappings for the PMC-Sierra MSP71xx devices. This patch references some platform support files previously submitted to the linux-mips@linux-mips.org list. Signed-off-by: Marc St-Jean <Marc_St-Jean@pmc-sierra.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'drivers/mtd/maps/pmcmsp-flash.c')
-rw-r--r--drivers/mtd/maps/pmcmsp-flash.c184
1 files changed, 184 insertions, 0 deletions
diff --git a/drivers/mtd/maps/pmcmsp-flash.c b/drivers/mtd/maps/pmcmsp-flash.c
new file mode 100644
index 000000000000..7e0377ec1c40
--- /dev/null
+++ b/drivers/mtd/maps/pmcmsp-flash.c
@@ -0,0 +1,184 @@
1/*
2 * Mapping of a custom board with both AMD CFI and JEDEC flash in partitions.
3 * Config with both CFI and JEDEC device support.
4 *
5 * Basically physmap.c with the addition of partitions and
6 * an array of mapping info to accomodate more than one flash type per board.
7 *
8 * Copyright 2005-2007 PMC-Sierra, Inc.
9 *
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.
14 *
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.
25 *
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.
29 */
30
31#include <linux/module.h>
32#include <linux/types.h>
33#include <linux/kernel.h>
34#include <linux/mtd/mtd.h>
35#include <linux/mtd/map.h>
36#include <linux/mtd/partitions.h>
37
38#include <asm/io.h>
39
40#include <msp_prom.h>
41#include <msp_regs.h>
42
43
44static struct mtd_info **msp_flash;
45static struct mtd_partition **msp_parts;
46static struct map_info *msp_maps;
47static int fcnt;
48
49#define DEBUG_MARKER printk(KERN_NOTICE "%s[%d]\n",__FUNCTION__,__LINE__)
50
51int __init init_msp_flash(void)
52{
53 int i, j;
54 int offset, coff;
55 char *env;
56 int pcnt;
57 char flash_name[] = "flash0";
58 char part_name[] = "flash0_0";
59 unsigned addr, size;
60
61 /* If ELB is disabled by "ful-mux" mode, we can't get at flash */
62 if ((*DEV_ID_REG & DEV_ID_SINGLE_PC) &&
63 (*ELB_1PC_EN_REG & SINGLE_PCCARD)) {
64 printk(KERN_NOTICE "Single PC Card mode: no flash access\n");
65 return -ENXIO;
66 }
67
68 /* examine the prom environment for flash devices */
69 for (fcnt = 0; (env = prom_getenv(flash_name)); fcnt++)
70 flash_name[5] = '0' + fcnt + 1;
71
72 if (fcnt < 1)
73 return -ENXIO;
74
75 printk(KERN_NOTICE "Found %d PMC flash devices\n", fcnt);
76 msp_flash = (struct mtd_info **)kmalloc(
77 fcnt * sizeof(struct map_info *), GFP_KERNEL);
78 msp_parts = (struct mtd_partition **)kmalloc(
79 fcnt * sizeof(struct mtd_partition *), GFP_KERNEL);
80 msp_maps = (struct map_info *)kmalloc(
81 fcnt * sizeof(struct mtd_info), GFP_KERNEL);
82 memset(msp_maps, 0, fcnt * sizeof(struct mtd_info));
83
84 /* loop over the flash devices, initializing each */
85 for (i = 0; i < fcnt; i++) {
86 /* examine the prom environment for flash partititions */
87 part_name[5] = '0' + i;
88 part_name[7] = '0';
89 for (pcnt = 0; (env = prom_getenv(part_name)); pcnt++)
90 part_name[7] = '0' + pcnt + 1;
91
92 if (pcnt == 0) {
93 printk(KERN_NOTICE "Skipping flash device %d "
94 "(no partitions defined)\n", i);
95 continue;
96 }
97
98 msp_parts[i] = (struct mtd_partition *)kmalloc(
99 pcnt * sizeof(struct mtd_partition), GFP_KERNEL);
100 memset(msp_parts[i], 0, pcnt * sizeof(struct mtd_partition));
101
102 /* now initialize the devices proper */
103 flash_name[5] = '0' + i;
104 env = prom_getenv(flash_name);
105
106 if (sscanf(env, "%x:%x", &addr, &size) < 2)
107 return -ENXIO;
108 addr = CPHYSADDR(addr);
109
110 printk(KERN_NOTICE
111 "MSP flash device \"%s\": 0x%08x at 0x%08x\n",
112 flash_name, size, addr);
113 /* This must matchs the actual size of the flash chip */
114 msp_maps[i].size = size;
115 msp_maps[i].phys = addr;
116
117 /*
118 * Platforms have a specific limit of the size of memory
119 * which may be mapped for flash:
120 */
121 if (size > CONFIG_MSP_FLASH_MAP_LIMIT)
122 size = CONFIG_MSP_FLASH_MAP_LIMIT;
123 msp_maps[i].virt = ioremap(addr, size);
124 msp_maps[i].bankwidth = 1;
125 msp_maps[i].name = strncpy(kmalloc(7, GFP_KERNEL),
126 flash_name, 7);
127
128 if (msp_maps[i].virt == NULL)
129 return -ENXIO;
130
131 for (j = 0; j < pcnt; j++) {
132 part_name[5] = '0' + i;
133 part_name[7] = '0' + j;
134
135 env = prom_getenv(part_name);
136
137 if (sscanf(env, "%x:%x:%n", &offset, &size, &coff) < 2)
138 return -ENXIO;
139
140 msp_parts[i][j].size = size;
141 msp_parts[i][j].offset = offset;
142 msp_parts[i][j].name = env + coff;
143 }
144
145 /* now probe and add the device */
146 simple_map_init(&msp_maps[i]);
147 msp_flash[i] = do_map_probe("cfi_probe", &msp_maps[i]);
148 if (msp_flash[i]) {
149 msp_flash[i]->owner = THIS_MODULE;
150 add_mtd_partitions(msp_flash[i], msp_parts[i], pcnt);
151 } else {
152 printk(KERN_ERR "map probe failed for flash\n");
153 return -ENXIO;
154 }
155 }
156
157 return 0;
158}
159
160static void __exit cleanup_msp_flash(void)
161{
162 int i;
163
164 for (i = 0; i < sizeof(msp_flash) / sizeof(struct mtd_info **); i++) {
165 del_mtd_partitions(msp_flash[i]);
166 map_destroy(msp_flash[i]);
167 iounmap((void *)msp_maps[i].virt);
168
169 /* free the memory */
170 kfree(msp_maps[i].name);
171 kfree(msp_parts[i]);
172 }
173
174 kfree(msp_flash);
175 kfree(msp_parts);
176 kfree(msp_maps);
177}
178
179MODULE_AUTHOR("PMC-Sierra, Inc");
180MODULE_DESCRIPTION("MTD map driver for PMC-Sierra MSP boards");
181MODULE_LICENSE("GPL");
182
183module_init(init_msp_flash);
184module_exit(cleanup_msp_flash);