blob: 29a9011573522abbe7d8b021ddec46182dcfb2d2 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Normal mappings of chips in physical memory
3 *
4 * Copyright (C) 2003 MontaVista Software Inc.
5 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
6 *
7 * 031022 - [jsun] add run-time configure and partition setup
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>
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010015#include <linux/device.h>
16#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/mtd/mtd.h>
18#include <linux/mtd/map.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/mtd/partitions.h>
Adrian Bunk2b9175c2005-11-29 14:49:38 +000020#include <linux/mtd/physmap.h>
Stefan Roesedf66e712008-02-01 15:26:54 +010021#include <linux/mtd/concat.h>
Atsushi Nemoto3136e902008-11-26 10:26:29 +000022#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
Stefan Roesedf66e712008-02-01 15:26:54 +010024#define MAX_RESOURCES 4
25
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010026struct physmap_flash_info {
Stefan Roesedf66e712008-02-01 15:26:54 +010027 struct mtd_info *mtd[MAX_RESOURCES];
28 struct mtd_info *cmtd;
29 struct map_info map[MAX_RESOURCES];
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010030#ifdef CONFIG_MTD_PARTITIONS
31 int nr_parts;
Atsushi Nemotoe4808142009-02-11 13:12:17 -080032 struct mtd_partition *parts;
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010033#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070034};
35
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010036static int physmap_flash_remove(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070037{
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010038 struct physmap_flash_info *info;
39 struct physmap_flash_data *physmap_data;
Stefan Roesedf66e712008-02-01 15:26:54 +010040 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010042 info = platform_get_drvdata(dev);
43 if (info == NULL)
44 return 0;
45 platform_set_drvdata(dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010047 physmap_data = dev->dev.platform_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Atsushi Nemotod58ab5c2009-03-10 12:55:55 -070049 if (info->cmtd) {
Atsushi Nemotoe4808142009-02-11 13:12:17 -080050#ifdef CONFIG_MTD_PARTITIONS
Atsushi Nemotod58ab5c2009-03-10 12:55:55 -070051 if (info->nr_parts || physmap_data->nr_parts)
52 del_mtd_partitions(info->cmtd);
53 else
54 del_mtd_device(info->cmtd);
Atsushi Nemotoe4808142009-02-11 13:12:17 -080055#else
Atsushi Nemotod58ab5c2009-03-10 12:55:55 -070056 del_mtd_device(info->cmtd);
57#endif
58 }
59#ifdef CONFIG_MTD_PARTITIONS
60 if (info->nr_parts)
61 kfree(info->parts);
Atsushi Nemotoe4808142009-02-11 13:12:17 -080062#endif
63
64#ifdef CONFIG_MTD_CONCAT
65 if (info->cmtd != info->mtd[0])
Stefan Roesedf66e712008-02-01 15:26:54 +010066 mtd_concat_destroy(info->cmtd);
Stefan Roesedf66e712008-02-01 15:26:54 +010067#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Stefan Roesedf66e712008-02-01 15:26:54 +010069 for (i = 0; i < MAX_RESOURCES; i++) {
Atsushi Nemotoe4808142009-02-11 13:12:17 -080070 if (info->mtd[i] != NULL)
Stefan Roesedf66e712008-02-01 15:26:54 +010071 map_destroy(info->mtd[i]);
Stefan Roesedf66e712008-02-01 15:26:54 +010072 }
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010073 return 0;
74}
75
Alexey Korolevd8140832008-12-16 18:22:39 +000076static const char *rom_probe_types[] = {
77 "cfi_probe",
78 "jedec_probe",
79 "qinfo_probe",
80 "map_rom",
81 NULL };
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010082#ifdef CONFIG_MTD_PARTITIONS
83static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
84#endif
85
86static int physmap_flash_probe(struct platform_device *dev)
87{
88 struct physmap_flash_data *physmap_data;
89 struct physmap_flash_info *info;
90 const char **probe_type;
Stefan Roesedf66e712008-02-01 15:26:54 +010091 int err = 0;
92 int i;
93 int devices_found = 0;
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010094
95 physmap_data = dev->dev.platform_data;
96 if (physmap_data == NULL)
97 return -ENODEV;
98
Atsushi Nemoto3136e902008-11-26 10:26:29 +000099 info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info),
100 GFP_KERNEL);
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100101 if (info == NULL) {
102 err = -ENOMEM;
103 goto err_out;
104 }
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100105
106 platform_set_drvdata(dev, info);
107
Stefan Roesedf66e712008-02-01 15:26:54 +0100108 for (i = 0; i < dev->num_resources; i++) {
109 printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
110 (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
111 (unsigned long long)dev->resource[i].start);
112
Atsushi Nemoto3136e902008-11-26 10:26:29 +0000113 if (!devm_request_mem_region(&dev->dev,
114 dev->resource[i].start,
115 dev->resource[i].end - dev->resource[i].start + 1,
Kay Sievers160bbab2008-12-23 10:00:14 +0000116 dev_name(&dev->dev))) {
Stefan Roesedf66e712008-02-01 15:26:54 +0100117 dev_err(&dev->dev, "Could not reserve memory region\n");
118 err = -ENOMEM;
119 goto err_out;
120 }
121
Kay Sievers160bbab2008-12-23 10:00:14 +0000122 info->map[i].name = dev_name(&dev->dev);
Stefan Roesedf66e712008-02-01 15:26:54 +0100123 info->map[i].phys = dev->resource[i].start;
124 info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
125 info->map[i].bankwidth = physmap_data->width;
126 info->map[i].set_vpp = physmap_data->set_vpp;
Alexey Korolevd8140832008-12-16 18:22:39 +0000127 info->map[i].pfow_base = physmap_data->pfow_base;
Stefan Roesedf66e712008-02-01 15:26:54 +0100128
Atsushi Nemoto3136e902008-11-26 10:26:29 +0000129 info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
130 info->map[i].size);
Stefan Roesedf66e712008-02-01 15:26:54 +0100131 if (info->map[i].virt == NULL) {
132 dev_err(&dev->dev, "Failed to ioremap flash region\n");
133 err = EIO;
134 goto err_out;
135 }
136
137 simple_map_init(&info->map[i]);
138
139 probe_type = rom_probe_types;
140 for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
141 info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
142 if (info->mtd[i] == NULL) {
143 dev_err(&dev->dev, "map_probe failed\n");
144 err = -ENXIO;
145 goto err_out;
146 } else {
147 devices_found++;
148 }
149 info->mtd[i]->owner = THIS_MODULE;
David Brownell87f39f02009-03-26 00:42:50 -0700150 info->mtd[i]->dev.parent = &dev->dev;
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100151 }
152
Stefan Roesedf66e712008-02-01 15:26:54 +0100153 if (devices_found == 1) {
154 info->cmtd = info->mtd[0];
155 } else if (devices_found > 1) {
156 /*
157 * We detected multiple devices. Concatenate them together.
158 */
159#ifdef CONFIG_MTD_CONCAT
Kay Sievers160bbab2008-12-23 10:00:14 +0000160 info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev));
Stefan Roesedf66e712008-02-01 15:26:54 +0100161 if (info->cmtd == NULL)
162 err = -ENXIO;
163#else
164 printk(KERN_ERR "physmap-flash: multiple devices "
165 "found but MTD concat support disabled.\n");
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100166 err = -ENXIO;
Stefan Roesedf66e712008-02-01 15:26:54 +0100167#endif
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100168 }
Stefan Roesedf66e712008-02-01 15:26:54 +0100169 if (err)
170 goto err_out;
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100171
172#ifdef CONFIG_MTD_PARTITIONS
Atsushi Nemotoe4808142009-02-11 13:12:17 -0800173 err = parse_mtd_partitions(info->cmtd, part_probe_types,
174 &info->parts, 0);
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100175 if (err > 0) {
Atsushi Nemotoe4808142009-02-11 13:12:17 -0800176 add_mtd_partitions(info->cmtd, info->parts, err);
177 info->nr_parts = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 return 0;
179 }
180
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100181 if (physmap_data->nr_parts) {
182 printk(KERN_NOTICE "Using physmap partition information\n");
Stefan Roesedf66e712008-02-01 15:26:54 +0100183 add_mtd_partitions(info->cmtd, physmap_data->parts,
184 physmap_data->nr_parts);
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100185 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Stefan Roesedf66e712008-02-01 15:26:54 +0100189 add_mtd_device(info->cmtd);
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100190 return 0;
191
192err_out:
193 physmap_flash_remove(dev);
194 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
196
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200197#ifdef CONFIG_PM
198static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state)
199{
200 struct physmap_flash_info *info = platform_get_drvdata(dev);
201 int ret = 0;
Stefan Roesedf66e712008-02-01 15:26:54 +0100202 int i;
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200203
Anton Vorontsov4a5691c2008-03-28 14:16:09 -0700204 for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
Uwe Kleine-König4b5e33a2008-07-22 09:39:01 +0200205 if (info->mtd[i]->suspend) {
206 ret = info->mtd[i]->suspend(info->mtd[i]);
207 if (ret)
208 goto fail;
209 }
210
211 return 0;
212fail:
213 for (--i; i >= 0; --i)
214 if (info->mtd[i]->suspend) {
215 BUG_ON(!info->mtd[i]->resume);
216 info->mtd[i]->resume(info->mtd[i]);
217 }
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200218
219 return ret;
220}
221
222static int physmap_flash_resume(struct platform_device *dev)
223{
224 struct physmap_flash_info *info = platform_get_drvdata(dev);
Stefan Roesedf66e712008-02-01 15:26:54 +0100225 int i;
226
Anton Vorontsov4a5691c2008-03-28 14:16:09 -0700227 for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
Robert Jarzmik7b249192008-07-22 09:39:00 +0200228 if (info->mtd[i]->resume)
229 info->mtd[i]->resume(info->mtd[i]);
Anton Vorontsov4a5691c2008-03-28 14:16:09 -0700230
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200231 return 0;
232}
233
234static void physmap_flash_shutdown(struct platform_device *dev)
235{
236 struct physmap_flash_info *info = platform_get_drvdata(dev);
Stefan Roesedf66e712008-02-01 15:26:54 +0100237 int i;
238
Anton Vorontsov4a5691c2008-03-28 14:16:09 -0700239 for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
Robert Jarzmik7b249192008-07-22 09:39:00 +0200240 if (info->mtd[i]->suspend && info->mtd[i]->resume)
241 if (info->mtd[i]->suspend(info->mtd[i]) == 0)
242 info->mtd[i]->resume(info->mtd[i]);
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200243}
akpm@linux-foundation.orgd5476682008-02-03 12:56:03 -0800244#else
245#define physmap_flash_suspend NULL
246#define physmap_flash_resume NULL
247#define physmap_flash_shutdown NULL
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200248#endif
249
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100250static struct platform_driver physmap_flash_driver = {
251 .probe = physmap_flash_probe,
252 .remove = physmap_flash_remove,
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200253 .suspend = physmap_flash_suspend,
254 .resume = physmap_flash_resume,
255 .shutdown = physmap_flash_shutdown,
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100256 .driver = {
257 .name = "physmap-flash",
Kay Sievers41d867c2008-04-18 13:44:26 -0700258 .owner = THIS_MODULE,
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100259 },
260};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262
Mike Frysingerdcb3e132008-12-01 14:23:40 -0800263#ifdef CONFIG_MTD_PHYSMAP_COMPAT
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100264static struct physmap_flash_data physmap_flash_data = {
265 .width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
266};
267
268static struct resource physmap_flash_resource = {
269 .start = CONFIG_MTD_PHYSMAP_START,
Sascha Hauer6d4f8222006-06-27 14:38:15 +0100270 .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100271 .flags = IORESOURCE_MEM,
272};
273
274static struct platform_device physmap_flash = {
275 .name = "physmap-flash",
276 .id = 0,
277 .dev = {
278 .platform_data = &physmap_flash_data,
279 },
280 .num_resources = 1,
281 .resource = &physmap_flash_resource,
282};
283
284void physmap_configure(unsigned long addr, unsigned long size,
285 int bankwidth, void (*set_vpp)(struct map_info *, int))
286{
287 physmap_flash_resource.start = addr;
288 physmap_flash_resource.end = addr + size - 1;
289 physmap_flash_data.width = bankwidth;
290 physmap_flash_data.set_vpp = set_vpp;
291}
292
293#ifdef CONFIG_MTD_PARTITIONS
294void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
295{
296 physmap_flash_data.nr_parts = num_parts;
297 physmap_flash_data.parts = parts;
298}
299#endif
300#endif
301
302static int __init physmap_init(void)
303{
304 int err;
305
306 err = platform_driver_register(&physmap_flash_driver);
Mike Frysingerdcb3e132008-12-01 14:23:40 -0800307#ifdef CONFIG_MTD_PHYSMAP_COMPAT
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100308 if (err == 0)
309 platform_device_register(&physmap_flash);
310#endif
311
312 return err;
313}
314
315static void __exit physmap_exit(void)
316{
Mike Frysingerdcb3e132008-12-01 14:23:40 -0800317#ifdef CONFIG_MTD_PHYSMAP_COMPAT
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100318 platform_device_unregister(&physmap_flash);
319#endif
320 platform_driver_unregister(&physmap_flash_driver);
321}
322
323module_init(physmap_init);
324module_exit(physmap_exit);
325
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326MODULE_LICENSE("GPL");
327MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
328MODULE_DESCRIPTION("Generic configurable MTD map driver");
Kay Sievers41d867c2008-04-18 13:44:26 -0700329
330/* legacy platform drivers can't hotplug or coldplg */
Mike Frysingerdcb3e132008-12-01 14:23:40 -0800331#ifndef CONFIG_MTD_PHYSMAP_COMPAT
Kay Sievers41d867c2008-04-18 13:44:26 -0700332/* work with hotplug and coldplug */
333MODULE_ALIAS("platform:physmap-flash");
334#endif