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Diffstat (limited to 'drivers/mtd/maps/tqm834x.c')
-rw-r--r--drivers/mtd/maps/tqm834x.c286
1 files changed, 0 insertions, 286 deletions
diff --git a/drivers/mtd/maps/tqm834x.c b/drivers/mtd/maps/tqm834x.c
deleted file mode 100644
index 9adc970e55e6..000000000000
--- a/drivers/mtd/maps/tqm834x.c
+++ /dev/null
@@ -1,286 +0,0 @@
1/*
2 * drivers/mtd/maps/tqm834x.c
3 *
4 * MTD mapping driver for TQM834x boards
5 *
6 * Copyright 2005 Wolfgang Denk, DENX Software Engineering, <wd@denx.de>.
7 *
8 * This file is licensed under the terms of the GNU General Public License
9 * version 2. This program is licensed "as is" without any warranty of any
10 * kind, whether express or implied.
11 *
12 */
13
14#include <linux/init.h>
15#include <linux/module.h>
16#include <linux/types.h>
17#include <linux/kernel.h>
18#include <linux/slab.h>
19#include <asm/io.h>
20#include <asm/ppcboot.h>
21
22#include <linux/mtd/mtd.h>
23#include <linux/mtd/map.h>
24#include <linux/mtd/partitions.h>
25
26#define FLASH_BANK_MAX 2
27
28extern unsigned char __res[];
29
30/* trivial struct to describe partition information */
31struct mtd_part_def
32{
33 int nums;
34 unsigned char *type;
35 struct mtd_partition* mtd_part;
36};
37
38static struct mtd_info* mtd_banks[FLASH_BANK_MAX];
39static struct map_info* map_banks[FLASH_BANK_MAX];
40static struct mtd_part_def part_banks[FLASH_BANK_MAX];
41
42static unsigned long num_banks;
43static unsigned long start_scan_addr;
44
45#ifdef CONFIG_MTD_PARTITIONS
46/*
47 * The following defines the partition layout of TQM834x boards.
48 *
49 * See include/linux/mtd/partitions.h for definition of the
50 * mtd_partition structure.
51 *
52 * Assume minimal initial size of 4 MiB per bank, will be updated
53 * later in init_tqm834x_mtd() routine.
54 */
55
56/* Partition definition for the first flash bank which is always present. */
57static struct mtd_partition tqm834x_partitions_bank1[] = {
58 {
59 .name = "u-boot", /* u-boot firmware */
60 .offset = 0x00000000,
61 .size = 0x00040000, /* 256 KiB */
62 /*mask_flags: MTD_WRITEABLE, * force read-only */
63 },
64 {
65 .name = "env", /* u-boot environment */
66 .offset = 0x00040000,
67 .size = 0x00020000, /* 128 KiB */
68 /*mask_flags: MTD_WRITEABLE, * force read-only */
69 },
70 {
71 .name = "kernel", /* linux kernel image */
72 .offset = 0x00060000,
73 .size = 0x00100000, /* 1 MiB */
74 /*mask_flags: MTD_WRITEABLE, * force read-only */
75 },
76 {
77 .name = "initrd", /* ramdisk image */
78 .offset = 0x00160000,
79 .size = 0x00200000, /* 2 MiB */
80 },
81 {
82 .name = "user", /* user data */
83 .offset = 0x00360000,
84 .size = 0x000a0000, /* remaining space */
85 /* NOTE: this parttion size is re-calcated in */
86 /* init_tqm834x_mtd() to cover actual remaining space. */
87 },
88};
89
90/* Partition definition for the second flash bank which may be present on some
91 * TQM834x boards.
92 */
93static struct mtd_partition tqm834x_partitions_bank2[] = {
94 {
95 .name = "jffs2", /* jffs2 filesystem */
96 .offset = 0x00000000,
97 .size = 0x00400000, /* whole device */
98 /* NOTE: this parttion size is re-calcated in */
99 /* init_tqm834x_mtd() to cover actual device size. */
100 },
101};
102
103#endif /* CONFIG_MTD_PARTITIONS */
104
105static int __init init_tqm834x_mtd(void)
106{
107 int idx = 0, ret = 0;
108 unsigned long flash_addr, flash_size, mtd_size = 0;
109
110 /* pointer to TQM834x board info data */
111 bd_t *bd = (bd_t *)__res;
112#ifdef CONFIG_MTD_CMDLINE_PARTS
113 int n;
114 char mtdid[4];
115 const char *part_probes[] = { "cmdlinepart", NULL };
116#endif
117
118 flash_addr = bd->bi_flashstart;
119 flash_size = bd->bi_flashsize;
120
121 /* request maximum flash size address space */
122 start_scan_addr = (unsigned long)ioremap(flash_addr, flash_size);
123 if (!start_scan_addr) {
124 printk("%s: Failed to ioremap address: 0x%lx\n",
125 __FUNCTION__, flash_addr);
126 return -EIO;
127 }
128
129 for(idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
130 if (mtd_size >= flash_size)
131 break;
132
133 pr_debug("%s: chip probing count %d\n", __FUNCTION__, idx);
134
135 map_banks[idx] = kzalloc(sizeof(struct map_info), GFP_KERNEL);
136 if (map_banks[idx] == NULL) {
137 ret = -ENOMEM;
138 goto error_mem;
139 }
140 map_banks[idx]->name = kzalloc(16, GFP_KERNEL);
141 if (map_banks[idx]->name == NULL) {
142 ret = -ENOMEM;
143 goto error_mem;
144 }
145
146 sprintf(map_banks[idx]->name, "TQM834x-%d", idx);
147 map_banks[idx]->size = flash_size;
148 map_banks[idx]->bankwidth = 4;
149
150 simple_map_init(map_banks[idx]);
151
152 map_banks[idx]->virt = (void __iomem *)
153 (start_scan_addr + ((idx > 0) ?
154 (mtd_banks[idx-1] ? mtd_banks[idx-1]->size : 0) : 0));
155 map_banks[idx]->phys =
156 flash_addr + ((idx > 0) ?
157 (mtd_banks[idx-1] ? mtd_banks[idx-1]->size : 0) : 0);
158
159 /* start to probe flash chips */
160 mtd_banks[idx] = do_map_probe("cfi_probe", map_banks[idx]);
161 if (mtd_banks[idx]) {
162 mtd_banks[idx]->owner = THIS_MODULE;
163 mtd_size += mtd_banks[idx]->size;
164 num_banks++;
165 pr_debug("%s: bank %ld, name: %s, size: %d bytes \n",
166 __FUNCTION__, num_banks,
167 mtd_banks[idx]->name, mtd_banks[idx]->size);
168 }
169 }
170
171 /* no supported flash chips found */
172 if (!num_banks) {
173 printk("TQM834x: No supported flash chips found!\n");
174 ret = -ENXIO;
175 goto error_mem;
176 }
177
178#ifdef CONFIG_MTD_PARTITIONS
179 /*
180 * Select static partition definitions
181 */
182 n = ARRAY_SIZE(tqm834x_partitions_bank1);
183 part_banks[0].mtd_part = tqm834x_partitions_bank1;
184 part_banks[0].type = "static image bank1";
185 part_banks[0].nums = n;
186
187 /* update last partition size to cover actual remaining space */
188 tqm834x_partitions_bank1[n - 1].size =
189 mtd_banks[0]->size -
190 tqm834x_partitions_bank1[n - 1].offset;
191
192 /* check if we have second bank? */
193 if (num_banks == 2) {
194 n = ARRAY_SIZE(tqm834x_partitions_bank2);
195 part_banks[1].mtd_part = tqm834x_partitions_bank2;
196 part_banks[1].type = "static image bank2";
197 part_banks[1].nums = n;
198
199 /* update last partition size to cover actual remaining space */
200 tqm834x_partitions_bank2[n - 1].size =
201 mtd_banks[1]->size -
202 tqm834x_partitions_bank2[n - 1].offset;
203 }
204
205 for(idx = 0; idx < num_banks ; idx++) {
206#ifdef CONFIG_MTD_CMDLINE_PARTS
207 sprintf(mtdid, "%d", idx);
208 n = parse_mtd_partitions(mtd_banks[idx],
209 part_probes,
210 &part_banks[idx].mtd_part,
211 0);
212 pr_debug("%s: %d command line partitions on bank %s\n",
213 __FUNCTION__, n, mtdid);
214 if (n > 0) {
215 part_banks[idx].type = "command line";
216 part_banks[idx].nums = n;
217 }
218#endif /* CONFIG_MTD_CMDLINE_PARTS */
219 if (part_banks[idx].nums == 0) {
220 printk(KERN_NOTICE
221 "TQM834x flash bank %d: no partition info "
222 "available, registering whole device\n", idx);
223 add_mtd_device(mtd_banks[idx]);
224 } else {
225 printk(KERN_NOTICE
226 "TQM834x flash bank %d: Using %s partition "
227 "definition\n", idx, part_banks[idx].type);
228 add_mtd_partitions(mtd_banks[idx],
229 part_banks[idx].mtd_part,
230 part_banks[idx].nums);
231 }
232 }
233#else /* ! CONFIG_MTD_PARTITIONS */
234 printk(KERN_NOTICE "TQM834x flash: registering %d flash banks "
235 "at once\n", num_banks);
236
237 for(idx = 0 ; idx < num_banks ; idx++)
238 add_mtd_device(mtd_banks[idx]);
239
240#endif /* CONFIG_MTD_PARTITIONS */
241
242 return 0;
243error_mem:
244 for (idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
245 if (map_banks[idx] != NULL) {
246 if (map_banks[idx]->name != NULL) {
247 kfree(map_banks[idx]->name);
248 map_banks[idx]->name = NULL;
249 }
250 kfree(map_banks[idx]);
251 map_banks[idx] = NULL;
252 }
253 }
254
255 iounmap((void *)start_scan_addr);
256
257 return ret;
258}
259
260static void __exit cleanup_tqm834x_mtd(void)
261{
262 unsigned int idx = 0;
263 for(idx = 0 ; idx < num_banks ; idx++) {
264 /* destroy mtd_info previously allocated */
265 if (mtd_banks[idx]) {
266 del_mtd_partitions(mtd_banks[idx]);
267 map_destroy(mtd_banks[idx]);
268 }
269
270 /* release map_info not used anymore */
271 kfree(map_banks[idx]->name);
272 kfree(map_banks[idx]);
273 }
274
275 if (start_scan_addr) {
276 iounmap((void *)start_scan_addr);
277 start_scan_addr = 0;
278 }
279}
280
281module_init(init_tqm834x_mtd);
282module_exit(cleanup_tqm834x_mtd);
283
284MODULE_LICENSE("GPL");
285MODULE_AUTHOR("Wolfgang Denk <wd@denx.de>");
286MODULE_DESCRIPTION("MTD map driver for TQM834x boards");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 08:54:23 -0500