Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial
[linux-2.6] / drivers / mtd / maps / wr_sbc82xx_flash.c
1 /*
2  * $Id: wr_sbc82xx_flash.c,v 1.8 2005/11/07 11:14:29 gleixner Exp $
3  *
4  * Map for flash chips on Wind River PowerQUICC II SBC82xx board.
5  *
6  * Copyright (C) 2004 Red Hat, Inc.
7  *
8  * Author: David Woodhouse <dwmw2@infradead.org>
9  *
10  */
11
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>
17 #include <asm/io.h>
18 #include <linux/mtd/mtd.h>
19 #include <linux/mtd/map.h>
20 #include <linux/mtd/partitions.h>
21
22 #include <asm/immap_cpm2.h>
23
24 static struct mtd_info *sbcmtd[3];
25 static struct mtd_partition *sbcmtd_parts[3];
26
27 struct map_info sbc82xx_flash_map[3] = {
28         {.name = "Boot flash"},
29         {.name = "Alternate boot flash"},
30         {.name = "User flash"}
31 };
32
33 static struct mtd_partition smallflash_parts[] = {
34         {
35                 .name =         "space",
36                 .size =         0x100000,
37                 .offset =       0,
38         }, {
39                 .name =         "bootloader",
40                 .size =         MTDPART_SIZ_FULL,
41                 .offset =       MTDPART_OFS_APPEND,
42         }
43 };
44
45 static struct mtd_partition bigflash_parts[] = {
46         {
47                 .name =         "bootloader",
48                 .size =         0x00100000,
49                 .offset =       0,
50         }, {
51                 .name =         "file system",
52                 .size =         0x01f00000,
53                 .offset =       MTDPART_OFS_APPEND,
54         }, {
55                 .name =         "boot config",
56                 .size =         0x00100000,
57                 .offset =       MTDPART_OFS_APPEND,
58         }, {
59                 .name =         "space",
60                 .size =         0x01f00000,
61                 .offset =       MTDPART_OFS_APPEND,
62         }
63 };
64
65 static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL};
66
67 #define init_sbc82xx_one_flash(map, br, or)                     \
68 do {                                                            \
69         (map).phys = (br & 1) ? (br & 0xffff8000) : 0;          \
70         (map).size = (br & 1) ? (~(or & 0xffff8000) + 1) : 0;   \
71         switch (br & 0x00001800) {                              \
72         case 0x00000000:                                        \
73         case 0x00000800:        (map).bankwidth = 1;    break;  \
74         case 0x00001000:        (map).bankwidth = 2;    break;  \
75         case 0x00001800:        (map).bankwidth = 4;    break;  \
76         }                                                       \
77 } while (0);
78
79 int __init init_sbc82xx_flash(void)
80 {
81         volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl;
82         int bigflash;
83         int i;
84
85 #ifdef CONFIG_SBC8560
86         mc = ioremap(0xff700000 + 0x5000, sizeof(memctl_cpm2_t));
87 #else
88         mc = &cpm2_immr->im_memctl;
89 #endif
90
91         bigflash = 1;
92         if ((mc->memc_br0 & 0x00001800) == 0x00001800)
93                 bigflash = 0;
94
95         init_sbc82xx_one_flash(sbc82xx_flash_map[0], mc->memc_br0, mc->memc_or0);
96         init_sbc82xx_one_flash(sbc82xx_flash_map[1], mc->memc_br6, mc->memc_or6);
97         init_sbc82xx_one_flash(sbc82xx_flash_map[2], mc->memc_br1, mc->memc_or1);
98
99 #ifdef CONFIG_SBC8560
100         iounmap((void *) mc);
101 #endif
102
103         for (i=0; i<3; i++) {
104                 int8_t flashcs[3] = { 0, 6, 1 };
105                 int nr_parts;
106
107                 printk(KERN_NOTICE "PowerQUICC II %s (%ld MiB on CS%d",
108                        sbc82xx_flash_map[i].name,
109                        (sbc82xx_flash_map[i].size >> 20),
110                        flashcs[i]);
111                 if (!sbc82xx_flash_map[i].phys) {
112                         /* We know it can't be at zero. */
113                         printk("): disabled by bootloader.\n");
114                         continue;
115                 }
116                 printk(" at %08lx)\n",  sbc82xx_flash_map[i].phys);
117
118                 sbc82xx_flash_map[i].virt = ioremap(sbc82xx_flash_map[i].phys, sbc82xx_flash_map[i].size);
119
120                 if (!sbc82xx_flash_map[i].virt) {
121                         printk("Failed to ioremap\n");
122                         continue;
123                 }
124
125                 simple_map_init(&sbc82xx_flash_map[i]);
126
127                 sbcmtd[i] = do_map_probe("cfi_probe", &sbc82xx_flash_map[i]);
128
129                 if (!sbcmtd[i])
130                         continue;
131
132                 sbcmtd[i]->owner = THIS_MODULE;
133
134                 nr_parts = parse_mtd_partitions(sbcmtd[i], part_probes,
135                                                 &sbcmtd_parts[i], 0);
136                 if (nr_parts > 0) {
137                         add_mtd_partitions (sbcmtd[i], sbcmtd_parts[i], nr_parts);
138                         continue;
139                 }
140
141                 /* No partitioning detected. Use default */
142                 if (i == 2) {
143                         add_mtd_device(sbcmtd[i]);
144                 } else if (i == bigflash) {
145                         add_mtd_partitions (sbcmtd[i], bigflash_parts, ARRAY_SIZE(bigflash_parts));
146                 } else {
147                         add_mtd_partitions (sbcmtd[i], smallflash_parts, ARRAY_SIZE(smallflash_parts));
148                 }
149         }
150         return 0;
151 }
152
153 static void __exit cleanup_sbc82xx_flash(void)
154 {
155         int i;
156
157         for (i=0; i<3; i++) {
158                 if (!sbcmtd[i])
159                         continue;
160
161                 if (i<2 || sbcmtd_parts[i])
162                         del_mtd_partitions(sbcmtd[i]);
163                 else
164                         del_mtd_device(sbcmtd[i]);
165
166                 kfree(sbcmtd_parts[i]);
167                 map_destroy(sbcmtd[i]);
168
169                 iounmap((void *)sbc82xx_flash_map[i].virt);
170                 sbc82xx_flash_map[i].virt = 0;
171         }
172 }
173
174 module_init(init_sbc82xx_flash);
175 module_exit(cleanup_sbc82xx_flash);
176
177
178 MODULE_LICENSE("GPL");
179 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
180 MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II");