Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * 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 Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 15 | #include <linux/device.h> |
| 16 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/mtd/mtd.h> |
| 18 | #include <linux/mtd/map.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/mtd/partitions.h> |
Adrian Bunk | 2b9175c | 2005-11-29 14:49:38 +0000 | [diff] [blame] | 20 | #include <linux/mtd/physmap.h> |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 21 | #include <linux/mtd/concat.h> |
Atsushi Nemoto | 3136e90 | 2008-11-26 10:26:29 +0000 | [diff] [blame] | 22 | #include <linux/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 24 | #define MAX_RESOURCES 4 |
| 25 | |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 26 | struct physmap_flash_info { |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 27 | struct mtd_info *mtd[MAX_RESOURCES]; |
| 28 | struct mtd_info *cmtd; |
| 29 | struct map_info map[MAX_RESOURCES]; |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 30 | #ifdef CONFIG_MTD_PARTITIONS |
| 31 | int nr_parts; |
Atsushi Nemoto | e480814 | 2009-02-11 13:12:17 -0800 | [diff] [blame] | 32 | struct mtd_partition *parts; |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 33 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | }; |
| 35 | |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 36 | static int physmap_flash_remove(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | { |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 38 | struct physmap_flash_info *info; |
| 39 | struct physmap_flash_data *physmap_data; |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 40 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 42 | info = platform_get_drvdata(dev); |
| 43 | if (info == NULL) |
| 44 | return 0; |
| 45 | platform_set_drvdata(dev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
H Hartley Sweeten | 4b56ffc | 2009-10-19 13:31:46 -0400 | [diff] [blame^] | 47 | if (info->cmtd == NULL) |
| 48 | return 0; |
| 49 | |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 50 | physmap_data = dev->dev.platform_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
H Hartley Sweeten | 4b56ffc | 2009-10-19 13:31:46 -0400 | [diff] [blame^] | 52 | if (mtd_has_partitions()) { |
| 53 | if (info->nr_parts || physmap_data->nr_parts) { |
Atsushi Nemoto | d58ab5c | 2009-03-10 12:55:55 -0700 | [diff] [blame] | 54 | del_mtd_partitions(info->cmtd); |
H Hartley Sweeten | 4b56ffc | 2009-10-19 13:31:46 -0400 | [diff] [blame^] | 55 | |
| 56 | if (info->nr_parts) |
| 57 | kfree(info->parts); |
| 58 | } else { |
Atsushi Nemoto | d58ab5c | 2009-03-10 12:55:55 -0700 | [diff] [blame] | 59 | del_mtd_device(info->cmtd); |
H Hartley Sweeten | 4b56ffc | 2009-10-19 13:31:46 -0400 | [diff] [blame^] | 60 | } |
| 61 | } else { |
Atsushi Nemoto | d58ab5c | 2009-03-10 12:55:55 -0700 | [diff] [blame] | 62 | del_mtd_device(info->cmtd); |
Atsushi Nemoto | d58ab5c | 2009-03-10 12:55:55 -0700 | [diff] [blame] | 63 | } |
Atsushi Nemoto | e480814 | 2009-02-11 13:12:17 -0800 | [diff] [blame] | 64 | |
| 65 | #ifdef CONFIG_MTD_CONCAT |
| 66 | if (info->cmtd != info->mtd[0]) |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 67 | mtd_concat_destroy(info->cmtd); |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 68 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 70 | for (i = 0; i < MAX_RESOURCES; i++) { |
Atsushi Nemoto | e480814 | 2009-02-11 13:12:17 -0800 | [diff] [blame] | 71 | if (info->mtd[i] != NULL) |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 72 | map_destroy(info->mtd[i]); |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 73 | } |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 74 | return 0; |
| 75 | } |
| 76 | |
Alexey Korolev | d814083 | 2008-12-16 18:22:39 +0000 | [diff] [blame] | 77 | static const char *rom_probe_types[] = { |
| 78 | "cfi_probe", |
| 79 | "jedec_probe", |
| 80 | "qinfo_probe", |
| 81 | "map_rom", |
| 82 | NULL }; |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 83 | #ifdef CONFIG_MTD_PARTITIONS |
| 84 | static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL }; |
| 85 | #endif |
| 86 | |
| 87 | static int physmap_flash_probe(struct platform_device *dev) |
| 88 | { |
| 89 | struct physmap_flash_data *physmap_data; |
| 90 | struct physmap_flash_info *info; |
| 91 | const char **probe_type; |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 92 | int err = 0; |
| 93 | int i; |
| 94 | int devices_found = 0; |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 95 | |
| 96 | physmap_data = dev->dev.platform_data; |
| 97 | if (physmap_data == NULL) |
| 98 | return -ENODEV; |
| 99 | |
Atsushi Nemoto | 3136e90 | 2008-11-26 10:26:29 +0000 | [diff] [blame] | 100 | info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info), |
| 101 | GFP_KERNEL); |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 102 | if (info == NULL) { |
| 103 | err = -ENOMEM; |
| 104 | goto err_out; |
| 105 | } |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 106 | |
| 107 | platform_set_drvdata(dev, info); |
| 108 | |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 109 | for (i = 0; i < dev->num_resources; i++) { |
| 110 | printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", |
| 111 | (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1), |
| 112 | (unsigned long long)dev->resource[i].start); |
| 113 | |
Atsushi Nemoto | 3136e90 | 2008-11-26 10:26:29 +0000 | [diff] [blame] | 114 | if (!devm_request_mem_region(&dev->dev, |
| 115 | dev->resource[i].start, |
| 116 | dev->resource[i].end - dev->resource[i].start + 1, |
Kay Sievers | 160bbab | 2008-12-23 10:00:14 +0000 | [diff] [blame] | 117 | dev_name(&dev->dev))) { |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 118 | dev_err(&dev->dev, "Could not reserve memory region\n"); |
| 119 | err = -ENOMEM; |
| 120 | goto err_out; |
| 121 | } |
| 122 | |
Kay Sievers | 160bbab | 2008-12-23 10:00:14 +0000 | [diff] [blame] | 123 | info->map[i].name = dev_name(&dev->dev); |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 124 | info->map[i].phys = dev->resource[i].start; |
| 125 | info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1; |
| 126 | info->map[i].bankwidth = physmap_data->width; |
| 127 | info->map[i].set_vpp = physmap_data->set_vpp; |
Alexey Korolev | d814083 | 2008-12-16 18:22:39 +0000 | [diff] [blame] | 128 | info->map[i].pfow_base = physmap_data->pfow_base; |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 129 | |
Atsushi Nemoto | 3136e90 | 2008-11-26 10:26:29 +0000 | [diff] [blame] | 130 | info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys, |
| 131 | info->map[i].size); |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 132 | if (info->map[i].virt == NULL) { |
| 133 | dev_err(&dev->dev, "Failed to ioremap flash region\n"); |
| 134 | err = EIO; |
| 135 | goto err_out; |
| 136 | } |
| 137 | |
| 138 | simple_map_init(&info->map[i]); |
| 139 | |
| 140 | probe_type = rom_probe_types; |
| 141 | for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++) |
| 142 | info->mtd[i] = do_map_probe(*probe_type, &info->map[i]); |
| 143 | if (info->mtd[i] == NULL) { |
| 144 | dev_err(&dev->dev, "map_probe failed\n"); |
| 145 | err = -ENXIO; |
| 146 | goto err_out; |
| 147 | } else { |
| 148 | devices_found++; |
| 149 | } |
| 150 | info->mtd[i]->owner = THIS_MODULE; |
David Brownell | 87f39f0 | 2009-03-26 00:42:50 -0700 | [diff] [blame] | 151 | info->mtd[i]->dev.parent = &dev->dev; |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 152 | } |
| 153 | |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 154 | if (devices_found == 1) { |
| 155 | info->cmtd = info->mtd[0]; |
| 156 | } else if (devices_found > 1) { |
| 157 | /* |
| 158 | * We detected multiple devices. Concatenate them together. |
| 159 | */ |
| 160 | #ifdef CONFIG_MTD_CONCAT |
Kay Sievers | 160bbab | 2008-12-23 10:00:14 +0000 | [diff] [blame] | 161 | info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev)); |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 162 | if (info->cmtd == NULL) |
| 163 | err = -ENXIO; |
| 164 | #else |
| 165 | printk(KERN_ERR "physmap-flash: multiple devices " |
| 166 | "found but MTD concat support disabled.\n"); |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 167 | err = -ENXIO; |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 168 | #endif |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 169 | } |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 170 | if (err) |
| 171 | goto err_out; |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 172 | |
H Hartley Sweeten | 4b56ffc | 2009-10-19 13:31:46 -0400 | [diff] [blame^] | 173 | if (mtd_has_partitions()) { |
| 174 | err = parse_mtd_partitions(info->cmtd, part_probe_types, |
| 175 | &info->parts, 0); |
| 176 | if (err > 0) { |
| 177 | add_mtd_partitions(info->cmtd, info->parts, err); |
| 178 | info->nr_parts = err; |
| 179 | return 0; |
| 180 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
H Hartley Sweeten | 4b56ffc | 2009-10-19 13:31:46 -0400 | [diff] [blame^] | 182 | if (physmap_data->nr_parts) { |
| 183 | printk(KERN_NOTICE "Using physmap partition information\n"); |
| 184 | add_mtd_partitions(info->cmtd, physmap_data->parts, |
| 185 | physmap_data->nr_parts); |
| 186 | return 0; |
| 187 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 190 | add_mtd_device(info->cmtd); |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 191 | return 0; |
| 192 | |
| 193 | err_out: |
| 194 | physmap_flash_remove(dev); |
| 195 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } |
| 197 | |
Lennert Buytenhek | 17c2dae | 2006-09-21 23:16:48 +0200 | [diff] [blame] | 198 | #ifdef CONFIG_PM |
Lennert Buytenhek | 17c2dae | 2006-09-21 23:16:48 +0200 | [diff] [blame] | 199 | static void physmap_flash_shutdown(struct platform_device *dev) |
| 200 | { |
| 201 | struct physmap_flash_info *info = platform_get_drvdata(dev); |
Stefan Roese | df66e71 | 2008-02-01 15:26:54 +0100 | [diff] [blame] | 202 | int i; |
| 203 | |
Anton Vorontsov | 4a5691c | 2008-03-28 14:16:09 -0700 | [diff] [blame] | 204 | for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++) |
Robert Jarzmik | 7b24919 | 2008-07-22 09:39:00 +0200 | [diff] [blame] | 205 | if (info->mtd[i]->suspend && info->mtd[i]->resume) |
| 206 | if (info->mtd[i]->suspend(info->mtd[i]) == 0) |
| 207 | info->mtd[i]->resume(info->mtd[i]); |
Lennert Buytenhek | 17c2dae | 2006-09-21 23:16:48 +0200 | [diff] [blame] | 208 | } |
akpm@linux-foundation.org | d547668 | 2008-02-03 12:56:03 -0800 | [diff] [blame] | 209 | #else |
akpm@linux-foundation.org | d547668 | 2008-02-03 12:56:03 -0800 | [diff] [blame] | 210 | #define physmap_flash_shutdown NULL |
Lennert Buytenhek | 17c2dae | 2006-09-21 23:16:48 +0200 | [diff] [blame] | 211 | #endif |
| 212 | |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 213 | static struct platform_driver physmap_flash_driver = { |
| 214 | .probe = physmap_flash_probe, |
| 215 | .remove = physmap_flash_remove, |
Lennert Buytenhek | 17c2dae | 2006-09-21 23:16:48 +0200 | [diff] [blame] | 216 | .shutdown = physmap_flash_shutdown, |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 217 | .driver = { |
| 218 | .name = "physmap-flash", |
Kay Sievers | 41d867c | 2008-04-18 13:44:26 -0700 | [diff] [blame] | 219 | .owner = THIS_MODULE, |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 220 | }, |
| 221 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | |
Mike Frysinger | dcb3e13 | 2008-12-01 14:23:40 -0800 | [diff] [blame] | 224 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 225 | static struct physmap_flash_data physmap_flash_data = { |
| 226 | .width = CONFIG_MTD_PHYSMAP_BANKWIDTH, |
| 227 | }; |
| 228 | |
| 229 | static struct resource physmap_flash_resource = { |
| 230 | .start = CONFIG_MTD_PHYSMAP_START, |
Sascha Hauer | 6d4f822 | 2006-06-27 14:38:15 +0100 | [diff] [blame] | 231 | .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1, |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 232 | .flags = IORESOURCE_MEM, |
| 233 | }; |
| 234 | |
| 235 | static 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 | }; |
| 244 | |
| 245 | void physmap_configure(unsigned long addr, unsigned long size, |
| 246 | int bankwidth, void (*set_vpp)(struct map_info *, int)) |
| 247 | { |
| 248 | physmap_flash_resource.start = addr; |
| 249 | physmap_flash_resource.end = addr + size - 1; |
| 250 | physmap_flash_data.width = bankwidth; |
| 251 | physmap_flash_data.set_vpp = set_vpp; |
| 252 | } |
| 253 | |
| 254 | #ifdef CONFIG_MTD_PARTITIONS |
| 255 | void physmap_set_partitions(struct mtd_partition *parts, int num_parts) |
| 256 | { |
| 257 | physmap_flash_data.nr_parts = num_parts; |
| 258 | physmap_flash_data.parts = parts; |
| 259 | } |
| 260 | #endif |
| 261 | #endif |
| 262 | |
| 263 | static int __init physmap_init(void) |
| 264 | { |
| 265 | int err; |
| 266 | |
| 267 | err = platform_driver_register(&physmap_flash_driver); |
Mike Frysinger | dcb3e13 | 2008-12-01 14:23:40 -0800 | [diff] [blame] | 268 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 269 | if (err == 0) |
| 270 | platform_device_register(&physmap_flash); |
| 271 | #endif |
| 272 | |
| 273 | return err; |
| 274 | } |
| 275 | |
| 276 | static void __exit physmap_exit(void) |
| 277 | { |
Mike Frysinger | dcb3e13 | 2008-12-01 14:23:40 -0800 | [diff] [blame] | 278 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
Lennert Buytenhek | 73566ed | 2006-05-07 17:16:36 +0100 | [diff] [blame] | 279 | platform_device_unregister(&physmap_flash); |
| 280 | #endif |
| 281 | platform_driver_unregister(&physmap_flash_driver); |
| 282 | } |
| 283 | |
| 284 | module_init(physmap_init); |
| 285 | module_exit(physmap_exit); |
| 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | MODULE_LICENSE("GPL"); |
| 288 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); |
| 289 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); |
Kay Sievers | 41d867c | 2008-04-18 13:44:26 -0700 | [diff] [blame] | 290 | |
| 291 | /* legacy platform drivers can't hotplug or coldplg */ |
Mike Frysinger | dcb3e13 | 2008-12-01 14:23:40 -0800 | [diff] [blame] | 292 | #ifndef CONFIG_MTD_PHYSMAP_COMPAT |
Kay Sievers | 41d867c | 2008-04-18 13:44:26 -0700 | [diff] [blame] | 293 | /* work with hotplug and coldplug */ |
| 294 | MODULE_ALIAS("platform:physmap-flash"); |
| 295 | #endif |