blob: 4305fd607015367cea988c9c8dcdbc21b1116d8d [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];
Paul Parsons876fe762012-03-07 14:12:08 +000030 spinlock_t vpp_lock;
31 int vpp_refcnt;
Linus Torvalds1da177e2005-04-16 15:20:36 -070032};
33
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010034static int physmap_flash_remove(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070035{
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010036 struct physmap_flash_info *info;
37 struct physmap_flash_data *physmap_data;
Stefan Roesedf66e712008-02-01 15:26:54 +010038 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010040 info = platform_get_drvdata(dev);
41 if (info == NULL)
42 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Jingoo Hand20d5a52013-07-30 17:18:06 +090044 physmap_data = dev_get_platdata(&dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
H Hartley Sweeten8ce110a2009-10-20 12:23:33 -040046 if (info->cmtd) {
Jamie Iles984e6d82011-05-23 10:22:45 +010047 mtd_device_unregister(info->cmtd);
H Hartley Sweeten8ce110a2009-10-20 12:23:33 -040048 if (info->cmtd != info->mtd[0])
49 mtd_concat_destroy(info->cmtd);
H Hartley Sweeten8ce110a2009-10-20 12:23:33 -040050 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Stefan Roesedf66e712008-02-01 15:26:54 +010052 for (i = 0; i < MAX_RESOURCES; i++) {
Atsushi Nemotoe4808142009-02-11 13:12:17 -080053 if (info->mtd[i] != NULL)
Stefan Roesedf66e712008-02-01 15:26:54 +010054 map_destroy(info->mtd[i]);
Stefan Roesedf66e712008-02-01 15:26:54 +010055 }
Marc Zyngierb7281ca2011-05-18 10:51:48 +010056
57 if (physmap_data->exit)
58 physmap_data->exit(dev);
59
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010060 return 0;
61}
62
Marc Zyngier667f3902011-05-18 10:51:55 +010063static void physmap_set_vpp(struct map_info *map, int state)
64{
65 struct platform_device *pdev;
66 struct physmap_flash_data *physmap_data;
Paul Parsons876fe762012-03-07 14:12:08 +000067 struct physmap_flash_info *info;
68 unsigned long flags;
Marc Zyngier667f3902011-05-18 10:51:55 +010069
70 pdev = (struct platform_device *)map->map_priv_1;
Jingoo Hand20d5a52013-07-30 17:18:06 +090071 physmap_data = dev_get_platdata(&pdev->dev);
Marc Zyngier667f3902011-05-18 10:51:55 +010072
Paul Parsons876fe762012-03-07 14:12:08 +000073 if (!physmap_data->set_vpp)
74 return;
75
76 info = platform_get_drvdata(pdev);
77
78 spin_lock_irqsave(&info->vpp_lock, flags);
79 if (state) {
80 if (++info->vpp_refcnt == 1) /* first nested 'on' */
81 physmap_data->set_vpp(pdev, 1);
82 } else {
83 if (--info->vpp_refcnt == 0) /* last nested 'off' */
84 physmap_data->set_vpp(pdev, 0);
85 }
86 spin_unlock_irqrestore(&info->vpp_lock, flags);
Marc Zyngier667f3902011-05-18 10:51:55 +010087}
88
Artem Bityutskiyf39cf6c2013-03-12 10:32:52 +020089static const char * const rom_probe_types[] = {
90 "cfi_probe", "jedec_probe", "qinfo_probe", "map_rom", NULL };
91
92static const char * const part_probe_types[] = {
93 "cmdlinepart", "RedBoot", "afs", NULL };
Lennert Buytenhek73566ed2006-05-07 17:16:36 +010094
95static int physmap_flash_probe(struct platform_device *dev)
96{
97 struct physmap_flash_data *physmap_data;
98 struct physmap_flash_info *info;
Artem Bityutskiyf39cf6c2013-03-12 10:32:52 +020099 const char * const *probe_type;
100 const char * const *part_types;
Stefan Roesedf66e712008-02-01 15:26:54 +0100101 int err = 0;
102 int i;
103 int devices_found = 0;
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100104
Jingoo Hand20d5a52013-07-30 17:18:06 +0900105 physmap_data = dev_get_platdata(&dev->dev);
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100106 if (physmap_data == NULL)
107 return -ENODEV;
108
Atsushi Nemoto3136e902008-11-26 10:26:29 +0000109 info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info),
110 GFP_KERNEL);
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100111 if (info == NULL) {
112 err = -ENOMEM;
113 goto err_out;
114 }
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100115
Marc Zyngierb7281ca2011-05-18 10:51:48 +0100116 if (physmap_data->init) {
117 err = physmap_data->init(dev);
118 if (err)
119 goto err_out;
120 }
121
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100122 platform_set_drvdata(dev, info);
123
Stefan Roesedf66e712008-02-01 15:26:54 +0100124 for (i = 0; i < dev->num_resources; i++) {
125 printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
H Hartley Sweeten1d90d2c2010-06-14 11:57:54 -0500126 (unsigned long long)resource_size(&dev->resource[i]),
Stefan Roesedf66e712008-02-01 15:26:54 +0100127 (unsigned long long)dev->resource[i].start);
128
Atsushi Nemoto3136e902008-11-26 10:26:29 +0000129 if (!devm_request_mem_region(&dev->dev,
130 dev->resource[i].start,
H Hartley Sweeten1d90d2c2010-06-14 11:57:54 -0500131 resource_size(&dev->resource[i]),
Kay Sievers160bbab2008-12-23 10:00:14 +0000132 dev_name(&dev->dev))) {
Stefan Roesedf66e712008-02-01 15:26:54 +0100133 dev_err(&dev->dev, "Could not reserve memory region\n");
134 err = -ENOMEM;
135 goto err_out;
136 }
137
Kay Sievers160bbab2008-12-23 10:00:14 +0000138 info->map[i].name = dev_name(&dev->dev);
Stefan Roesedf66e712008-02-01 15:26:54 +0100139 info->map[i].phys = dev->resource[i].start;
H Hartley Sweeten1d90d2c2010-06-14 11:57:54 -0500140 info->map[i].size = resource_size(&dev->resource[i]);
Stefan Roesedf66e712008-02-01 15:26:54 +0100141 info->map[i].bankwidth = physmap_data->width;
Marc Zyngier667f3902011-05-18 10:51:55 +0100142 info->map[i].set_vpp = physmap_set_vpp;
Alexey Korolevd8140832008-12-16 18:22:39 +0000143 info->map[i].pfow_base = physmap_data->pfow_base;
Marc Zyngier667f3902011-05-18 10:51:55 +0100144 info->map[i].map_priv_1 = (unsigned long)dev;
Stefan Roesedf66e712008-02-01 15:26:54 +0100145
Atsushi Nemoto3136e902008-11-26 10:26:29 +0000146 info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
147 info->map[i].size);
Stefan Roesedf66e712008-02-01 15:26:54 +0100148 if (info->map[i].virt == NULL) {
149 dev_err(&dev->dev, "Failed to ioremap flash region\n");
Roel Kluin895fb492009-11-11 21:47:06 +0100150 err = -EIO;
Stefan Roesedf66e712008-02-01 15:26:54 +0100151 goto err_out;
152 }
153
154 simple_map_init(&info->map[i]);
155
156 probe_type = rom_probe_types;
Barry Song78ef7fa2010-01-15 15:50:14 +0800157 if (physmap_data->probe_type == NULL) {
158 for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
159 info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
160 } else
161 info->mtd[i] = do_map_probe(physmap_data->probe_type, &info->map[i]);
162
Stefan Roesedf66e712008-02-01 15:26:54 +0100163 if (info->mtd[i] == NULL) {
164 dev_err(&dev->dev, "map_probe failed\n");
165 err = -ENXIO;
166 goto err_out;
167 } else {
168 devices_found++;
169 }
170 info->mtd[i]->owner = THIS_MODULE;
David Brownell87f39f02009-03-26 00:42:50 -0700171 info->mtd[i]->dev.parent = &dev->dev;
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100172 }
173
Stefan Roesedf66e712008-02-01 15:26:54 +0100174 if (devices_found == 1) {
175 info->cmtd = info->mtd[0];
176 } else if (devices_found > 1) {
177 /*
178 * We detected multiple devices. Concatenate them together.
179 */
Kay Sievers160bbab2008-12-23 10:00:14 +0000180 info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev));
Stefan Roesedf66e712008-02-01 15:26:54 +0100181 if (info->cmtd == NULL)
182 err = -ENXIO;
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100183 }
Stefan Roesedf66e712008-02-01 15:26:54 +0100184 if (err)
185 goto err_out;
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100186
Paul Parsons876fe762012-03-07 14:12:08 +0000187 spin_lock_init(&info->vpp_lock);
188
Jonas Gorski529688f2011-12-05 16:08:09 +0100189 part_types = physmap_data->part_probe_types ? : part_probe_types;
190
Artem Bityutskiy42d7fbe2012-03-09 19:24:26 +0200191 mtd_device_parse_register(info->cmtd, part_types, NULL,
Dmitry Eremin-Solenikovd45fd122011-06-02 17:59:58 +0400192 physmap_data->parts, physmap_data->nr_parts);
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100193 return 0;
194
195err_out:
196 physmap_flash_remove(dev);
197 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198}
199
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200200#ifdef CONFIG_PM
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200201static void physmap_flash_shutdown(struct platform_device *dev)
202{
203 struct physmap_flash_info *info = platform_get_drvdata(dev);
Stefan Roesedf66e712008-02-01 15:26:54 +0100204 int i;
205
Anton Vorontsov4a5691c2008-03-28 14:16:09 -0700206 for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
Artem Bityutskiy079c9852011-12-30 17:15:59 +0200207 if (mtd_suspend(info->mtd[i]) == 0)
208 mtd_resume(info->mtd[i]);
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200209}
akpm@linux-foundation.orgd5476682008-02-03 12:56:03 -0800210#else
akpm@linux-foundation.orgd5476682008-02-03 12:56:03 -0800211#define physmap_flash_shutdown NULL
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200212#endif
213
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100214static struct platform_driver physmap_flash_driver = {
215 .probe = physmap_flash_probe,
216 .remove = physmap_flash_remove,
Lennert Buytenhek17c2dae2006-09-21 23:16:48 +0200217 .shutdown = physmap_flash_shutdown,
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100218 .driver = {
219 .name = "physmap-flash",
220 },
221};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223
Mike Frysingerdcb3e132008-12-01 14:23:40 -0800224#ifdef CONFIG_MTD_PHYSMAP_COMPAT
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100225static struct physmap_flash_data physmap_flash_data = {
226 .width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
227};
228
229static struct resource physmap_flash_resource = {
230 .start = CONFIG_MTD_PHYSMAP_START,
Sascha Hauer6d4f8222006-06-27 14:38:15 +0100231 .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100232 .flags = IORESOURCE_MEM,
233};
234
235static struct platform_device physmap_flash = {
236 .name = "physmap-flash",
237 .id = 0,
238 .dev = {
239 .platform_data = &physmap_flash_data,
240 },
241 .num_resources = 1,
242 .resource = &physmap_flash_resource,
243};
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100244#endif
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100245
246static int __init physmap_init(void)
247{
248 int err;
249
250 err = platform_driver_register(&physmap_flash_driver);
Mike Frysingerdcb3e132008-12-01 14:23:40 -0800251#ifdef CONFIG_MTD_PHYSMAP_COMPAT
H Hartley Sweeten1ca5d2f2010-04-02 17:46:30 -0500252 if (err == 0) {
253 err = platform_device_register(&physmap_flash);
254 if (err)
255 platform_driver_unregister(&physmap_flash_driver);
256 }
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100257#endif
258
259 return err;
260}
261
262static void __exit physmap_exit(void)
263{
Mike Frysingerdcb3e132008-12-01 14:23:40 -0800264#ifdef CONFIG_MTD_PHYSMAP_COMPAT
Lennert Buytenhek73566ed2006-05-07 17:16:36 +0100265 platform_device_unregister(&physmap_flash);
266#endif
267 platform_driver_unregister(&physmap_flash_driver);
268}
269
270module_init(physmap_init);
271module_exit(physmap_exit);
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273MODULE_LICENSE("GPL");
274MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
275MODULE_DESCRIPTION("Generic configurable MTD map driver");
Kay Sievers41d867c2008-04-18 13:44:26 -0700276
277/* legacy platform drivers can't hotplug or coldplg */
Mike Frysingerdcb3e132008-12-01 14:23:40 -0800278#ifndef CONFIG_MTD_PHYSMAP_COMPAT
Kay Sievers41d867c2008-04-18 13:44:26 -0700279/* work with hotplug and coldplug */
280MODULE_ALIAS("platform:physmap-flash");
281#endif