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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Flash memory access on SA11x0 based devices | |
69f34c98 | 3 | * |
2f82af08 | 4 | * (C) 2000 Nicolas Pitre <nico@fluxnic.net> |
1da177e4 | 5 | */ |
1da177e4 LT |
6 | #include <linux/module.h> |
7 | #include <linux/types.h> | |
8 | #include <linux/ioport.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/slab.h> | |
d052d1be | 13 | #include <linux/platform_device.h> |
1da177e4 | 14 | #include <linux/err.h> |
99730225 | 15 | #include <linux/io.h> |
1da177e4 LT |
16 | |
17 | #include <linux/mtd/mtd.h> | |
18 | #include <linux/mtd/map.h> | |
19 | #include <linux/mtd/partitions.h> | |
20 | #include <linux/mtd/concat.h> | |
21 | ||
a09e64fb | 22 | #include <mach/hardware.h> |
1da177e4 LT |
23 | #include <asm/sizes.h> |
24 | #include <asm/mach/flash.h> | |
25 | ||
26 | #if 0 | |
27 | /* | |
28 | * This is here for documentation purposes only - until these people | |
29 | * submit their machine types. It will be gone January 2005. | |
30 | */ | |
31 | static struct mtd_partition consus_partitions[] = { | |
32 | { | |
33 | .name = "Consus boot firmware", | |
34 | .offset = 0, | |
35 | .size = 0x00040000, | |
36 | .mask_flags = MTD_WRITABLE, /* force read-only */ | |
37 | }, { | |
38 | .name = "Consus kernel", | |
39 | .offset = 0x00040000, | |
40 | .size = 0x00100000, | |
41 | .mask_flags = 0, | |
42 | }, { | |
43 | .name = "Consus disk", | |
44 | .offset = 0x00140000, | |
45 | /* The rest (up to 16M) for jffs. We could put 0 and | |
46 | make it find the size automatically, but right now | |
47 | i have 32 megs. jffs will use all 32 megs if given | |
48 | the chance, and this leads to horrible problems | |
49 | when you try to re-flash the image because blob | |
50 | won't erase the whole partition. */ | |
51 | .size = 0x01000000 - 0x00140000, | |
52 | .mask_flags = 0, | |
53 | }, { | |
54 | /* this disk is a secondary disk, which can be used as | |
55 | needed, for simplicity, make it the size of the other | |
56 | consus partition, although realistically it could be | |
57 | the remainder of the disk (depending on the file | |
58 | system used) */ | |
59 | .name = "Consus disk2", | |
60 | .offset = 0x01000000, | |
61 | .size = 0x01000000 - 0x00140000, | |
62 | .mask_flags = 0, | |
63 | } | |
64 | }; | |
65 | ||
66 | /* Frodo has 2 x 16M 28F128J3A flash chips in bank 0: */ | |
67 | static struct mtd_partition frodo_partitions[] = | |
68 | { | |
69 | { | |
70 | .name = "bootloader", | |
71 | .size = 0x00040000, | |
72 | .offset = 0x00000000, | |
73 | .mask_flags = MTD_WRITEABLE | |
74 | }, { | |
75 | .name = "bootloader params", | |
76 | .size = 0x00040000, | |
77 | .offset = MTDPART_OFS_APPEND, | |
78 | .mask_flags = MTD_WRITEABLE | |
79 | }, { | |
80 | .name = "kernel", | |
81 | .size = 0x00100000, | |
82 | .offset = MTDPART_OFS_APPEND, | |
83 | .mask_flags = MTD_WRITEABLE | |
84 | }, { | |
85 | .name = "ramdisk", | |
86 | .size = 0x00400000, | |
87 | .offset = MTDPART_OFS_APPEND, | |
88 | .mask_flags = MTD_WRITEABLE | |
89 | }, { | |
90 | .name = "file system", | |
91 | .size = MTDPART_SIZ_FULL, | |
92 | .offset = MTDPART_OFS_APPEND | |
93 | } | |
94 | }; | |
95 | ||
96 | static struct mtd_partition jornada56x_partitions[] = { | |
97 | { | |
98 | .name = "bootldr", | |
99 | .size = 0x00040000, | |
100 | .offset = 0, | |
101 | .mask_flags = MTD_WRITEABLE, | |
102 | }, { | |
103 | .name = "rootfs", | |
104 | .size = MTDPART_SIZ_FULL, | |
105 | .offset = MTDPART_OFS_APPEND, | |
106 | } | |
107 | }; | |
108 | ||
109 | static void jornada56x_set_vpp(int vpp) | |
110 | { | |
111 | if (vpp) | |
112 | GPSR = GPIO_GPIO26; | |
113 | else | |
114 | GPCR = GPIO_GPIO26; | |
115 | GPDR |= GPIO_GPIO26; | |
116 | } | |
117 | ||
118 | /* | |
119 | * Machine Phys Size set_vpp | |
120 | * Consus : SA1100_CS0_PHYS SZ_32M | |
121 | * Frodo : SA1100_CS0_PHYS SZ_32M | |
122 | * Jornada56x: SA1100_CS0_PHYS SZ_32M jornada56x_set_vpp | |
123 | */ | |
124 | #endif | |
125 | ||
126 | struct sa_subdev_info { | |
127 | char name[16]; | |
128 | struct map_info map; | |
129 | struct mtd_info *mtd; | |
57725f0a | 130 | struct flash_platform_data *plat; |
1da177e4 LT |
131 | }; |
132 | ||
133 | struct sa_info { | |
1da177e4 LT |
134 | struct mtd_info *mtd; |
135 | int num_subdev; | |
136 | struct sa_subdev_info subdev[0]; | |
137 | }; | |
138 | ||
139 | static void sa1100_set_vpp(struct map_info *map, int on) | |
140 | { | |
141 | struct sa_subdev_info *subdev = container_of(map, struct sa_subdev_info, map); | |
57725f0a | 142 | subdev->plat->set_vpp(on); |
1da177e4 LT |
143 | } |
144 | ||
145 | static void sa1100_destroy_subdev(struct sa_subdev_info *subdev) | |
146 | { | |
147 | if (subdev->mtd) | |
148 | map_destroy(subdev->mtd); | |
149 | if (subdev->map.virt) | |
150 | iounmap(subdev->map.virt); | |
151 | release_mem_region(subdev->map.phys, subdev->map.size); | |
152 | } | |
153 | ||
154 | static int sa1100_probe_subdev(struct sa_subdev_info *subdev, struct resource *res) | |
155 | { | |
156 | unsigned long phys; | |
157 | unsigned int size; | |
158 | int ret; | |
159 | ||
160 | phys = res->start; | |
161 | size = res->end - phys + 1; | |
162 | ||
163 | /* | |
164 | * Retrieve the bankwidth from the MSC registers. | |
165 | * We currently only implement CS0 and CS1 here. | |
166 | */ | |
167 | switch (phys) { | |
168 | default: | |
169 | printk(KERN_WARNING "SA1100 flash: unknown base address " | |
170 | "0x%08lx, assuming CS0\n", phys); | |
171 | ||
172 | case SA1100_CS0_PHYS: | |
173 | subdev->map.bankwidth = (MSC0 & MSC_RBW) ? 2 : 4; | |
174 | break; | |
175 | ||
176 | case SA1100_CS1_PHYS: | |
177 | subdev->map.bankwidth = ((MSC0 >> 16) & MSC_RBW) ? 2 : 4; | |
178 | break; | |
179 | } | |
180 | ||
181 | if (!request_mem_region(phys, size, subdev->name)) { | |
182 | ret = -EBUSY; | |
183 | goto out; | |
184 | } | |
185 | ||
57725f0a | 186 | if (subdev->plat->set_vpp) |
1da177e4 LT |
187 | subdev->map.set_vpp = sa1100_set_vpp; |
188 | ||
189 | subdev->map.phys = phys; | |
190 | subdev->map.size = size; | |
191 | subdev->map.virt = ioremap(phys, size); | |
192 | if (!subdev->map.virt) { | |
193 | ret = -ENOMEM; | |
194 | goto err; | |
195 | } | |
196 | ||
197 | simple_map_init(&subdev->map); | |
198 | ||
199 | /* | |
200 | * Now let's probe for the actual flash. Do it here since | |
201 | * specific machine settings might have been set above. | |
202 | */ | |
57725f0a | 203 | subdev->mtd = do_map_probe(subdev->plat->map_name, &subdev->map); |
1da177e4 LT |
204 | if (subdev->mtd == NULL) { |
205 | ret = -ENXIO; | |
206 | goto err; | |
207 | } | |
208 | subdev->mtd->owner = THIS_MODULE; | |
209 | ||
794d579a RK |
210 | printk(KERN_INFO "SA1100 flash: CFI device at 0x%08lx, %uMiB, %d-bit\n", |
211 | phys, (unsigned)(subdev->mtd->size >> 20), | |
1da177e4 LT |
212 | subdev->map.bankwidth * 8); |
213 | ||
214 | return 0; | |
215 | ||
216 | err: | |
217 | sa1100_destroy_subdev(subdev); | |
218 | out: | |
219 | return ret; | |
220 | } | |
221 | ||
0d2ef7d7 | 222 | static void sa1100_destroy(struct sa_info *info, struct flash_platform_data *plat) |
1da177e4 LT |
223 | { |
224 | int i; | |
225 | ||
226 | if (info->mtd) { | |
2fe2e24e | 227 | mtd_device_unregister(info->mtd); |
1da177e4 LT |
228 | if (info->mtd != info->subdev[0].mtd) |
229 | mtd_concat_destroy(info->mtd); | |
1da177e4 LT |
230 | } |
231 | ||
1da177e4 LT |
232 | for (i = info->num_subdev - 1; i >= 0; i--) |
233 | sa1100_destroy_subdev(&info->subdev[i]); | |
234 | kfree(info); | |
0d2ef7d7 RK |
235 | |
236 | if (plat->exit) | |
237 | plat->exit(); | |
1da177e4 LT |
238 | } |
239 | ||
5a134239 | 240 | static struct sa_info *__devinit |
57725f0a | 241 | sa1100_setup_mtd(struct platform_device *pdev, struct flash_platform_data *plat) |
1da177e4 LT |
242 | { |
243 | struct sa_info *info; | |
244 | int nr, size, i, ret = 0; | |
245 | ||
246 | /* | |
247 | * Count number of devices. | |
248 | */ | |
249 | for (nr = 0; ; nr++) | |
250 | if (!platform_get_resource(pdev, IORESOURCE_MEM, nr)) | |
251 | break; | |
252 | ||
253 | if (nr == 0) { | |
254 | ret = -ENODEV; | |
255 | goto out; | |
256 | } | |
257 | ||
258 | size = sizeof(struct sa_info) + sizeof(struct sa_subdev_info) * nr; | |
259 | ||
260 | /* | |
261 | * Allocate the map_info structs in one go. | |
262 | */ | |
95b93a0c | 263 | info = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
264 | if (!info) { |
265 | ret = -ENOMEM; | |
266 | goto out; | |
267 | } | |
268 | ||
0d2ef7d7 RK |
269 | if (plat->init) { |
270 | ret = plat->init(); | |
271 | if (ret) | |
272 | goto err; | |
273 | } | |
274 | ||
1da177e4 LT |
275 | /* |
276 | * Claim and then map the memory regions. | |
277 | */ | |
278 | for (i = 0; i < nr; i++) { | |
279 | struct sa_subdev_info *subdev = &info->subdev[i]; | |
280 | struct resource *res; | |
281 | ||
282 | res = platform_get_resource(pdev, IORESOURCE_MEM, i); | |
283 | if (!res) | |
284 | break; | |
285 | ||
286 | subdev->map.name = subdev->name; | |
14e66f76 | 287 | sprintf(subdev->name, "%s-%d", plat->name, i); |
57725f0a | 288 | subdev->plat = plat; |
1da177e4 LT |
289 | |
290 | ret = sa1100_probe_subdev(subdev, res); | |
291 | if (ret) | |
292 | break; | |
293 | } | |
294 | ||
295 | info->num_subdev = i; | |
296 | ||
297 | /* | |
298 | * ENXIO is special. It means we didn't find a chip when we probed. | |
299 | */ | |
300 | if (ret != 0 && !(ret == -ENXIO && info->num_subdev > 0)) | |
301 | goto err; | |
302 | ||
303 | /* | |
304 | * If we found one device, don't bother with concat support. If | |
305 | * we found multiple devices, use concat if we have it available, | |
306 | * otherwise fail. Either way, it'll be called "sa1100". | |
307 | */ | |
308 | if (info->num_subdev == 1) { | |
14e66f76 | 309 | strcpy(info->subdev[0].name, plat->name); |
1da177e4 LT |
310 | info->mtd = info->subdev[0].mtd; |
311 | ret = 0; | |
312 | } else if (info->num_subdev > 1) { | |
1da177e4 LT |
313 | struct mtd_info *cdev[nr]; |
314 | /* | |
315 | * We detected multiple devices. Concatenate them together. | |
316 | */ | |
317 | for (i = 0; i < info->num_subdev; i++) | |
318 | cdev[i] = info->subdev[i].mtd; | |
319 | ||
320 | info->mtd = mtd_concat_create(cdev, info->num_subdev, | |
14e66f76 | 321 | plat->name); |
1da177e4 LT |
322 | if (info->mtd == NULL) |
323 | ret = -ENXIO; | |
1da177e4 LT |
324 | } |
325 | ||
326 | if (ret == 0) | |
327 | return info; | |
328 | ||
329 | err: | |
0d2ef7d7 | 330 | sa1100_destroy(info, plat); |
1da177e4 LT |
331 | out: |
332 | return ERR_PTR(ret); | |
333 | } | |
334 | ||
335 | static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL }; | |
336 | ||
f0b1e589 | 337 | static int __devinit sa1100_mtd_probe(struct platform_device *pdev) |
1da177e4 | 338 | { |
57725f0a | 339 | struct flash_platform_data *plat = pdev->dev.platform_data; |
1da177e4 | 340 | struct sa_info *info; |
769dc431 | 341 | int err; |
1da177e4 | 342 | |
57725f0a | 343 | if (!plat) |
1da177e4 LT |
344 | return -ENODEV; |
345 | ||
57725f0a | 346 | info = sa1100_setup_mtd(pdev, plat); |
1da177e4 LT |
347 | if (IS_ERR(info)) { |
348 | err = PTR_ERR(info); | |
349 | goto out; | |
350 | } | |
351 | ||
352 | /* | |
353 | * Partition selection stuff. | |
354 | */ | |
769dc431 DB |
355 | mtd_device_parse_register(info->mtd, part_probes, 0, |
356 | plat->parts, plat->nr_parts); | |
822e5e72 | 357 | |
3ae5eaec | 358 | platform_set_drvdata(pdev, info); |
1da177e4 LT |
359 | err = 0; |
360 | ||
361 | out: | |
362 | return err; | |
363 | } | |
364 | ||
3ae5eaec | 365 | static int __exit sa1100_mtd_remove(struct platform_device *pdev) |
1da177e4 | 366 | { |
3ae5eaec RK |
367 | struct sa_info *info = platform_get_drvdata(pdev); |
368 | struct flash_platform_data *plat = pdev->dev.platform_data; | |
0d2ef7d7 | 369 | |
3ae5eaec | 370 | platform_set_drvdata(pdev, NULL); |
0d2ef7d7 RK |
371 | sa1100_destroy(info, plat); |
372 | ||
1da177e4 LT |
373 | return 0; |
374 | } | |
375 | ||
376 | #ifdef CONFIG_PM | |
3ae5eaec | 377 | static void sa1100_mtd_shutdown(struct platform_device *dev) |
13bfb34c | 378 | { |
3ae5eaec | 379 | struct sa_info *info = platform_get_drvdata(dev); |
13bfb34c RK |
380 | if (info && info->mtd->suspend(info->mtd) == 0) |
381 | info->mtd->resume(info->mtd); | |
382 | } | |
1da177e4 | 383 | #else |
13bfb34c | 384 | #define sa1100_mtd_shutdown NULL |
1da177e4 LT |
385 | #endif |
386 | ||
3ae5eaec | 387 | static struct platform_driver sa1100_mtd_driver = { |
1da177e4 LT |
388 | .probe = sa1100_mtd_probe, |
389 | .remove = __exit_p(sa1100_mtd_remove), | |
13bfb34c | 390 | .shutdown = sa1100_mtd_shutdown, |
3ae5eaec | 391 | .driver = { |
bcc8f3e0 | 392 | .name = "sa1100-mtd", |
41d867c9 | 393 | .owner = THIS_MODULE, |
3ae5eaec | 394 | }, |
1da177e4 LT |
395 | }; |
396 | ||
397 | static int __init sa1100_mtd_init(void) | |
398 | { | |
3ae5eaec | 399 | return platform_driver_register(&sa1100_mtd_driver); |
1da177e4 LT |
400 | } |
401 | ||
402 | static void __exit sa1100_mtd_exit(void) | |
403 | { | |
3ae5eaec | 404 | platform_driver_unregister(&sa1100_mtd_driver); |
1da177e4 LT |
405 | } |
406 | ||
407 | module_init(sa1100_mtd_init); | |
408 | module_exit(sa1100_mtd_exit); | |
409 | ||
410 | MODULE_AUTHOR("Nicolas Pitre"); | |
411 | MODULE_DESCRIPTION("SA1100 CFI map driver"); | |
412 | MODULE_LICENSE("GPL"); | |
bcc8f3e0 | 413 | MODULE_ALIAS("platform:sa1100-mtd"); |