2 * $Id: wr_sbc82xx_flash.c,v 1.8 2005/11/07 11:14:29 gleixner Exp $
4 * Map for flash chips on Wind River PowerQUICC II SBC82xx board.
6 * Copyright (C) 2004 Red Hat, Inc.
8 * Author: David Woodhouse <dwmw2@infradead.org>
12 #include <linux/module.h>
13 #include <linux/types.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
18 #include <linux/mtd/mtd.h>
19 #include <linux/mtd/map.h>
20 #include <linux/config.h>
21 #include <linux/mtd/partitions.h>
23 #include <asm/immap_cpm2.h>
25 static struct mtd_info
*sbcmtd
[3];
26 static struct mtd_partition
*sbcmtd_parts
[3];
28 struct map_info sbc82xx_flash_map
[3] = {
29 {.name
= "Boot flash"},
30 {.name
= "Alternate boot flash"},
31 {.name
= "User flash"}
34 static struct mtd_partition smallflash_parts
[] = {
41 .size
= MTDPART_SIZ_FULL
,
42 .offset
= MTDPART_OFS_APPEND
,
46 static struct mtd_partition bigflash_parts
[] = {
52 .name
= "file system",
54 .offset
= MTDPART_OFS_APPEND
,
56 .name
= "boot config",
58 .offset
= MTDPART_OFS_APPEND
,
62 .offset
= MTDPART_OFS_APPEND
,
66 static const char *part_probes
[] __initdata
= {"cmdlinepart", "RedBoot", NULL
};
68 #define init_sbc82xx_one_flash(map, br, or) \
70 (map).phys = (br & 1) ? (br & 0xffff8000) : 0; \
71 (map).size = (br & 1) ? (~(or & 0xffff8000) + 1) : 0; \
72 switch (br & 0x00001800) { \
74 case 0x00000800: (map).bankwidth = 1; break; \
75 case 0x00001000: (map).bankwidth = 2; break; \
76 case 0x00001800: (map).bankwidth = 4; break; \
80 int __init
init_sbc82xx_flash(void)
82 volatile memctl_cpm2_t
*mc
= &cpm2_immr
->im_memctl
;
87 mc
= ioremap(0xff700000 + 0x5000, sizeof(memctl_cpm2_t
));
89 mc
= &cpm2_immr
->im_memctl
;
93 if ((mc
->memc_br0
& 0x00001800) == 0x00001800)
96 init_sbc82xx_one_flash(sbc82xx_flash_map
[0], mc
->memc_br0
, mc
->memc_or0
);
97 init_sbc82xx_one_flash(sbc82xx_flash_map
[1], mc
->memc_br6
, mc
->memc_or6
);
98 init_sbc82xx_one_flash(sbc82xx_flash_map
[2], mc
->memc_br1
, mc
->memc_or1
);
100 #ifdef CONFIG_SBC8560
101 iounmap((void *) mc
);
104 for (i
=0; i
<3; i
++) {
105 int8_t flashcs
[3] = { 0, 6, 1 };
108 printk(KERN_NOTICE
"PowerQUICC II %s (%ld MiB on CS%d",
109 sbc82xx_flash_map
[i
].name
,
110 (sbc82xx_flash_map
[i
].size
>> 20),
112 if (!sbc82xx_flash_map
[i
].phys
) {
113 /* We know it can't be at zero. */
114 printk("): disabled by bootloader.\n");
117 printk(" at %08lx)\n", sbc82xx_flash_map
[i
].phys
);
119 sbc82xx_flash_map
[i
].virt
= ioremap(sbc82xx_flash_map
[i
].phys
, sbc82xx_flash_map
[i
].size
);
121 if (!sbc82xx_flash_map
[i
].virt
) {
122 printk("Failed to ioremap\n");
126 simple_map_init(&sbc82xx_flash_map
[i
]);
128 sbcmtd
[i
] = do_map_probe("cfi_probe", &sbc82xx_flash_map
[i
]);
133 sbcmtd
[i
]->owner
= THIS_MODULE
;
135 nr_parts
= parse_mtd_partitions(sbcmtd
[i
], part_probes
,
136 &sbcmtd_parts
[i
], 0);
138 add_mtd_partitions (sbcmtd
[i
], sbcmtd_parts
[i
], nr_parts
);
142 /* No partitioning detected. Use default */
144 add_mtd_device(sbcmtd
[i
]);
145 } else if (i
== bigflash
) {
146 add_mtd_partitions (sbcmtd
[i
], bigflash_parts
, ARRAY_SIZE(bigflash_parts
));
148 add_mtd_partitions (sbcmtd
[i
], smallflash_parts
, ARRAY_SIZE(smallflash_parts
));
154 static void __exit
cleanup_sbc82xx_flash(void)
158 for (i
=0; i
<3; i
++) {
162 if (i
<2 || sbcmtd_parts
[i
])
163 del_mtd_partitions(sbcmtd
[i
]);
165 del_mtd_device(sbcmtd
[i
]);
167 kfree(sbcmtd_parts
[i
]);
168 map_destroy(sbcmtd
[i
]);
170 iounmap((void *)sbc82xx_flash_map
[i
].virt
);
171 sbc82xx_flash_map
[i
].virt
= 0;
175 module_init(init_sbc82xx_flash
);
176 module_exit(cleanup_sbc82xx_flash
);
179 MODULE_LICENSE("GPL");
180 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
181 MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II");