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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Map for flash chips on Wind River PowerQUICC II SBC82xx board. |
3 | * | |
4 | * Copyright (C) 2004 Red Hat, Inc. | |
5 | * | |
6 | * Author: David Woodhouse <dwmw2@infradead.org> | |
7 | * | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/slab.h> | |
15 | #include <asm/io.h> | |
16 | #include <linux/mtd/mtd.h> | |
17 | #include <linux/mtd/map.h> | |
1da177e4 LT |
18 | #include <linux/mtd/partitions.h> |
19 | ||
20 | #include <asm/immap_cpm2.h> | |
21 | ||
22 | static struct mtd_info *sbcmtd[3]; | |
23 | static struct mtd_partition *sbcmtd_parts[3]; | |
24 | ||
25 | struct map_info sbc82xx_flash_map[3] = { | |
26 | {.name = "Boot flash"}, | |
27 | {.name = "Alternate boot flash"}, | |
28 | {.name = "User flash"} | |
29 | }; | |
30 | ||
31 | static struct mtd_partition smallflash_parts[] = { | |
32 | { | |
33 | .name = "space", | |
34 | .size = 0x100000, | |
35 | .offset = 0, | |
36 | }, { | |
37 | .name = "bootloader", | |
38 | .size = MTDPART_SIZ_FULL, | |
39 | .offset = MTDPART_OFS_APPEND, | |
40 | } | |
41 | }; | |
42 | ||
43 | static struct mtd_partition bigflash_parts[] = { | |
44 | { | |
45 | .name = "bootloader", | |
46 | .size = 0x00100000, | |
47 | .offset = 0, | |
48 | }, { | |
49 | .name = "file system", | |
50 | .size = 0x01f00000, | |
51 | .offset = MTDPART_OFS_APPEND, | |
52 | }, { | |
53 | .name = "boot config", | |
54 | .size = 0x00100000, | |
55 | .offset = MTDPART_OFS_APPEND, | |
56 | }, { | |
57 | .name = "space", | |
58 | .size = 0x01f00000, | |
59 | .offset = MTDPART_OFS_APPEND, | |
60 | } | |
61 | }; | |
62 | ||
63 | static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL}; | |
64 | ||
65 | #define init_sbc82xx_one_flash(map, br, or) \ | |
66 | do { \ | |
67 | (map).phys = (br & 1) ? (br & 0xffff8000) : 0; \ | |
68 | (map).size = (br & 1) ? (~(or & 0xffff8000) + 1) : 0; \ | |
69 | switch (br & 0x00001800) { \ | |
70 | case 0x00000000: \ | |
71 | case 0x00000800: (map).bankwidth = 1; break; \ | |
72 | case 0x00001000: (map).bankwidth = 2; break; \ | |
73 | case 0x00001800: (map).bankwidth = 4; break; \ | |
74 | } \ | |
75 | } while (0); | |
76 | ||
8d240325 | 77 | static int __init init_sbc82xx_flash(void) |
1da177e4 LT |
78 | { |
79 | volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl; | |
80 | int bigflash; | |
81 | int i; | |
82 | ||
83 | #ifdef CONFIG_SBC8560 | |
84 | mc = ioremap(0xff700000 + 0x5000, sizeof(memctl_cpm2_t)); | |
85 | #else | |
86 | mc = &cpm2_immr->im_memctl; | |
87 | #endif | |
88 | ||
89 | bigflash = 1; | |
90 | if ((mc->memc_br0 & 0x00001800) == 0x00001800) | |
91 | bigflash = 0; | |
92 | ||
93 | init_sbc82xx_one_flash(sbc82xx_flash_map[0], mc->memc_br0, mc->memc_or0); | |
94 | init_sbc82xx_one_flash(sbc82xx_flash_map[1], mc->memc_br6, mc->memc_or6); | |
95 | init_sbc82xx_one_flash(sbc82xx_flash_map[2], mc->memc_br1, mc->memc_or1); | |
96 | ||
97 | #ifdef CONFIG_SBC8560 | |
98 | iounmap((void *) mc); | |
99 | #endif | |
100 | ||
101 | for (i=0; i<3; i++) { | |
102 | int8_t flashcs[3] = { 0, 6, 1 }; | |
103 | int nr_parts; | |
104 | ||
105 | printk(KERN_NOTICE "PowerQUICC II %s (%ld MiB on CS%d", | |
106 | sbc82xx_flash_map[i].name, | |
107 | (sbc82xx_flash_map[i].size >> 20), | |
108 | flashcs[i]); | |
109 | if (!sbc82xx_flash_map[i].phys) { | |
110 | /* We know it can't be at zero. */ | |
111 | printk("): disabled by bootloader.\n"); | |
112 | continue; | |
113 | } | |
114 | printk(" at %08lx)\n", sbc82xx_flash_map[i].phys); | |
115 | ||
116 | sbc82xx_flash_map[i].virt = ioremap(sbc82xx_flash_map[i].phys, sbc82xx_flash_map[i].size); | |
117 | ||
118 | if (!sbc82xx_flash_map[i].virt) { | |
119 | printk("Failed to ioremap\n"); | |
120 | continue; | |
121 | } | |
122 | ||
123 | simple_map_init(&sbc82xx_flash_map[i]); | |
124 | ||
125 | sbcmtd[i] = do_map_probe("cfi_probe", &sbc82xx_flash_map[i]); | |
126 | ||
127 | if (!sbcmtd[i]) | |
128 | continue; | |
129 | ||
130 | sbcmtd[i]->owner = THIS_MODULE; | |
131 | ||
132 | nr_parts = parse_mtd_partitions(sbcmtd[i], part_probes, | |
133 | &sbcmtd_parts[i], 0); | |
134 | if (nr_parts > 0) { | |
135 | add_mtd_partitions (sbcmtd[i], sbcmtd_parts[i], nr_parts); | |
136 | continue; | |
137 | } | |
138 | ||
139 | /* No partitioning detected. Use default */ | |
140 | if (i == 2) { | |
141 | add_mtd_device(sbcmtd[i]); | |
142 | } else if (i == bigflash) { | |
143 | add_mtd_partitions (sbcmtd[i], bigflash_parts, ARRAY_SIZE(bigflash_parts)); | |
144 | } else { | |
145 | add_mtd_partitions (sbcmtd[i], smallflash_parts, ARRAY_SIZE(smallflash_parts)); | |
146 | } | |
147 | } | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static void __exit cleanup_sbc82xx_flash(void) | |
152 | { | |
153 | int i; | |
154 | ||
155 | for (i=0; i<3; i++) { | |
156 | if (!sbcmtd[i]) | |
157 | continue; | |
158 | ||
159 | if (i<2 || sbcmtd_parts[i]) | |
160 | del_mtd_partitions(sbcmtd[i]); | |
161 | else | |
162 | del_mtd_device(sbcmtd[i]); | |
69f34c98 | 163 | |
1da177e4 LT |
164 | kfree(sbcmtd_parts[i]); |
165 | map_destroy(sbcmtd[i]); | |
69f34c98 | 166 | |
1da177e4 LT |
167 | iounmap((void *)sbc82xx_flash_map[i].virt); |
168 | sbc82xx_flash_map[i].virt = 0; | |
169 | } | |
170 | } | |
171 | ||
172 | module_init(init_sbc82xx_flash); | |
173 | module_exit(cleanup_sbc82xx_flash); | |
174 | ||
175 | ||
176 | MODULE_LICENSE("GPL"); | |
177 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
178 | MODULE_DESCRIPTION("Flash map driver for WindRiver PowerQUICC II"); |