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68aa0fa8 MSJ |
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 | ||
44 | static struct mtd_info **msp_flash; | |
45 | static struct mtd_partition **msp_parts; | |
46 | static struct map_info *msp_maps; | |
47 | static int fcnt; | |
48 | ||
cb53b3b9 | 49 | #define DEBUG_MARKER printk(KERN_NOTICE "%s[%d]\n", __func__, __LINE__) |
68aa0fa8 | 50 | |
6127cfcd | 51 | static int __init init_msp_flash(void) |
68aa0fa8 MSJ |
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); | |
4fb4caa6 MK |
76 | |
77 | msp_flash = kmalloc(fcnt * sizeof(struct map_info *), GFP_KERNEL); | |
78 | msp_parts = kmalloc(fcnt * sizeof(struct mtd_partition *), GFP_KERNEL); | |
79 | msp_maps = kcalloc(fcnt, sizeof(struct mtd_info), GFP_KERNEL); | |
80 | if (!msp_flash || !msp_parts || !msp_maps) { | |
81 | kfree(msp_maps); | |
82 | kfree(msp_parts); | |
83 | kfree(msp_flash); | |
84 | return -ENOMEM; | |
85 | } | |
68aa0fa8 MSJ |
86 | |
87 | /* loop over the flash devices, initializing each */ | |
88 | for (i = 0; i < fcnt; i++) { | |
89 | /* examine the prom environment for flash partititions */ | |
90 | part_name[5] = '0' + i; | |
91 | part_name[7] = '0'; | |
92 | for (pcnt = 0; (env = prom_getenv(part_name)); pcnt++) | |
93 | part_name[7] = '0' + pcnt + 1; | |
94 | ||
95 | if (pcnt == 0) { | |
96 | printk(KERN_NOTICE "Skipping flash device %d " | |
97 | "(no partitions defined)\n", i); | |
98 | continue; | |
99 | } | |
100 | ||
4fb4caa6 MK |
101 | msp_parts[i] = kcalloc(pcnt, sizeof(struct mtd_partition), |
102 | GFP_KERNEL); | |
68aa0fa8 MSJ |
103 | |
104 | /* now initialize the devices proper */ | |
105 | flash_name[5] = '0' + i; | |
106 | env = prom_getenv(flash_name); | |
107 | ||
108 | if (sscanf(env, "%x:%x", &addr, &size) < 2) | |
109 | return -ENXIO; | |
110 | addr = CPHYSADDR(addr); | |
111 | ||
112 | printk(KERN_NOTICE | |
113 | "MSP flash device \"%s\": 0x%08x at 0x%08x\n", | |
114 | flash_name, size, addr); | |
115 | /* This must matchs the actual size of the flash chip */ | |
116 | msp_maps[i].size = size; | |
117 | msp_maps[i].phys = addr; | |
118 | ||
119 | /* | |
120 | * Platforms have a specific limit of the size of memory | |
121 | * which may be mapped for flash: | |
122 | */ | |
123 | if (size > CONFIG_MSP_FLASH_MAP_LIMIT) | |
124 | size = CONFIG_MSP_FLASH_MAP_LIMIT; | |
125 | msp_maps[i].virt = ioremap(addr, size); | |
126 | msp_maps[i].bankwidth = 1; | |
127 | msp_maps[i].name = strncpy(kmalloc(7, GFP_KERNEL), | |
128 | flash_name, 7); | |
129 | ||
130 | if (msp_maps[i].virt == NULL) | |
131 | return -ENXIO; | |
132 | ||
133 | for (j = 0; j < pcnt; j++) { | |
134 | part_name[5] = '0' + i; | |
135 | part_name[7] = '0' + j; | |
136 | ||
137 | env = prom_getenv(part_name); | |
138 | ||
139 | if (sscanf(env, "%x:%x:%n", &offset, &size, &coff) < 2) | |
140 | return -ENXIO; | |
141 | ||
142 | msp_parts[i][j].size = size; | |
143 | msp_parts[i][j].offset = offset; | |
144 | msp_parts[i][j].name = env + coff; | |
145 | } | |
146 | ||
147 | /* now probe and add the device */ | |
148 | simple_map_init(&msp_maps[i]); | |
149 | msp_flash[i] = do_map_probe("cfi_probe", &msp_maps[i]); | |
150 | if (msp_flash[i]) { | |
151 | msp_flash[i]->owner = THIS_MODULE; | |
152 | add_mtd_partitions(msp_flash[i], msp_parts[i], pcnt); | |
153 | } else { | |
154 | printk(KERN_ERR "map probe failed for flash\n"); | |
155 | return -ENXIO; | |
156 | } | |
157 | } | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static void __exit cleanup_msp_flash(void) | |
163 | { | |
164 | int i; | |
165 | ||
166 | for (i = 0; i < sizeof(msp_flash) / sizeof(struct mtd_info **); i++) { | |
167 | del_mtd_partitions(msp_flash[i]); | |
168 | map_destroy(msp_flash[i]); | |
169 | iounmap((void *)msp_maps[i].virt); | |
170 | ||
171 | /* free the memory */ | |
172 | kfree(msp_maps[i].name); | |
173 | kfree(msp_parts[i]); | |
174 | } | |
175 | ||
176 | kfree(msp_flash); | |
177 | kfree(msp_parts); | |
178 | kfree(msp_maps); | |
179 | } | |
180 | ||
181 | MODULE_AUTHOR("PMC-Sierra, Inc"); | |
182 | MODULE_DESCRIPTION("MTD map driver for PMC-Sierra MSP boards"); | |
183 | MODULE_LICENSE("GPL"); | |
184 | ||
185 | module_init(init_msp_flash); | |
186 | module_exit(cleanup_msp_flash); |