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 accomodate 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 add_mtd_partitions(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 del_mtd_partitions(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 del_mtd_partitions(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
);