Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * platform.c - platform 'pseudo' bus for legacy devices |
| 3 | * |
| 4 | * Copyright (c) 2002-3 Patrick Mochel |
| 5 | * Copyright (c) 2002-3 Open Source Development Labs |
| 6 | * |
| 7 | * This file is released under the GPLv2 |
| 8 | * |
| 9 | * Please see Documentation/driver-model/platform.txt for more |
| 10 | * information. |
| 11 | */ |
| 12 | |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 13 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/dma-mapping.h> |
| 17 | #include <linux/bootmem.h> |
| 18 | #include <linux/err.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 19 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
Ben Dooks | a1bdc7a | 2005-10-13 17:54:41 +0100 | [diff] [blame] | 21 | #include "base.h" |
| 22 | |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 23 | #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \ |
| 24 | driver)) |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 25 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | struct device platform_bus = { |
| 27 | .bus_id = "platform", |
| 28 | }; |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 29 | EXPORT_SYMBOL_GPL(platform_bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 32 | * platform_get_resource - get a resource for a device |
| 33 | * @dev: platform device |
| 34 | * @type: resource type |
| 35 | * @num: resource index |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 37 | struct resource *platform_get_resource(struct platform_device *dev, |
| 38 | unsigned int type, unsigned int num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | { |
| 40 | int i; |
| 41 | |
| 42 | for (i = 0; i < dev->num_resources; i++) { |
| 43 | struct resource *r = &dev->resource[i]; |
| 44 | |
| 45 | if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM| |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 46 | IORESOURCE_IRQ|IORESOURCE_DMA)) == type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | if (num-- == 0) |
| 48 | return r; |
| 49 | } |
| 50 | return NULL; |
| 51 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 52 | EXPORT_SYMBOL_GPL(platform_get_resource); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 55 | * platform_get_irq - get an IRQ for a device |
| 56 | * @dev: platform device |
| 57 | * @num: IRQ number index |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | */ |
| 59 | int platform_get_irq(struct platform_device *dev, unsigned int num) |
| 60 | { |
| 61 | struct resource *r = platform_get_resource(dev, IORESOURCE_IRQ, num); |
| 62 | |
David Vrabel | 305b322 | 2006-01-19 17:52:27 +0000 | [diff] [blame] | 63 | return r ? r->start : -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 65 | EXPORT_SYMBOL_GPL(platform_get_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 68 | * platform_get_resource_byname - get a resource for a device by name |
| 69 | * @dev: platform device |
| 70 | * @type: resource type |
| 71 | * @name: resource name |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 73 | struct resource *platform_get_resource_byname(struct platform_device *dev, |
| 74 | unsigned int type, char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
| 76 | int i; |
| 77 | |
| 78 | for (i = 0; i < dev->num_resources; i++) { |
| 79 | struct resource *r = &dev->resource[i]; |
| 80 | |
| 81 | if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM| |
| 82 | IORESOURCE_IRQ|IORESOURCE_DMA)) == type) |
| 83 | if (!strcmp(r->name, name)) |
| 84 | return r; |
| 85 | } |
| 86 | return NULL; |
| 87 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 88 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 91 | * platform_get_irq - get an IRQ for a device |
| 92 | * @dev: platform device |
| 93 | * @name: IRQ name |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | */ |
| 95 | int platform_get_irq_byname(struct platform_device *dev, char *name) |
| 96 | { |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 97 | struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, |
| 98 | name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
David Vrabel | 305b322 | 2006-01-19 17:52:27 +0000 | [diff] [blame] | 100 | return r ? r->start : -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 102 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 105 | * platform_add_devices - add a numbers of platform devices |
| 106 | * @devs: array of platform devices to add |
| 107 | * @num: number of platform devices in array |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | */ |
| 109 | int platform_add_devices(struct platform_device **devs, int num) |
| 110 | { |
| 111 | int i, ret = 0; |
| 112 | |
| 113 | for (i = 0; i < num; i++) { |
| 114 | ret = platform_device_register(devs[i]); |
| 115 | if (ret) { |
| 116 | while (--i >= 0) |
| 117 | platform_device_unregister(devs[i]); |
| 118 | break; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | return ret; |
| 123 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 124 | EXPORT_SYMBOL_GPL(platform_add_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 126 | struct platform_object { |
| 127 | struct platform_device pdev; |
| 128 | char name[1]; |
| 129 | }; |
| 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 132 | * platform_device_put |
| 133 | * @pdev: platform device to free |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 134 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 135 | * Free all memory associated with a platform device. This function must |
| 136 | * _only_ be externally called in error cases. All other usage is a bug. |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 137 | */ |
| 138 | void platform_device_put(struct platform_device *pdev) |
| 139 | { |
| 140 | if (pdev) |
| 141 | put_device(&pdev->dev); |
| 142 | } |
| 143 | EXPORT_SYMBOL_GPL(platform_device_put); |
| 144 | |
| 145 | static void platform_device_release(struct device *dev) |
| 146 | { |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 147 | struct platform_object *pa = container_of(dev, struct platform_object, |
| 148 | pdev.dev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 149 | |
| 150 | kfree(pa->pdev.dev.platform_data); |
| 151 | kfree(pa->pdev.resource); |
| 152 | kfree(pa); |
| 153 | } |
| 154 | |
| 155 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 156 | * platform_device_alloc |
| 157 | * @name: base name of the device we're adding |
| 158 | * @id: instance id |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 159 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 160 | * Create a platform device object which can have other objects attached |
| 161 | * to it, and which will have attached objects freed when it is released. |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 162 | */ |
Jean Delvare | 1359555 | 2007-09-09 12:54:16 +0200 | [diff] [blame] | 163 | struct platform_device *platform_device_alloc(const char *name, int id) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 164 | { |
| 165 | struct platform_object *pa; |
| 166 | |
| 167 | pa = kzalloc(sizeof(struct platform_object) + strlen(name), GFP_KERNEL); |
| 168 | if (pa) { |
| 169 | strcpy(pa->name, name); |
| 170 | pa->pdev.name = pa->name; |
| 171 | pa->pdev.id = id; |
| 172 | device_initialize(&pa->pdev.dev); |
| 173 | pa->pdev.dev.release = platform_device_release; |
| 174 | } |
| 175 | |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 176 | return pa ? &pa->pdev : NULL; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 177 | } |
| 178 | EXPORT_SYMBOL_GPL(platform_device_alloc); |
| 179 | |
| 180 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 181 | * platform_device_add_resources |
| 182 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
| 183 | * @res: set of resources that needs to be allocated for the device |
| 184 | * @num: number of resources |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 185 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 186 | * Add a copy of the resources to the platform device. The memory |
| 187 | * associated with the resources will be freed when the platform device is |
| 188 | * released. |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 189 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 190 | int platform_device_add_resources(struct platform_device *pdev, |
| 191 | struct resource *res, unsigned int num) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 192 | { |
| 193 | struct resource *r; |
| 194 | |
| 195 | r = kmalloc(sizeof(struct resource) * num, GFP_KERNEL); |
| 196 | if (r) { |
| 197 | memcpy(r, res, sizeof(struct resource) * num); |
| 198 | pdev->resource = r; |
| 199 | pdev->num_resources = num; |
| 200 | } |
| 201 | return r ? 0 : -ENOMEM; |
| 202 | } |
| 203 | EXPORT_SYMBOL_GPL(platform_device_add_resources); |
| 204 | |
| 205 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 206 | * platform_device_add_data |
| 207 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
| 208 | * @data: platform specific data for this platform device |
| 209 | * @size: size of platform specific data |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 210 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 211 | * Add a copy of platform specific data to the platform device's |
| 212 | * platform_data pointer. The memory associated with the platform data |
| 213 | * will be freed when the platform device is released. |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 214 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 215 | int platform_device_add_data(struct platform_device *pdev, const void *data, |
| 216 | size_t size) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 217 | { |
| 218 | void *d; |
| 219 | |
| 220 | d = kmalloc(size, GFP_KERNEL); |
| 221 | if (d) { |
| 222 | memcpy(d, data, size); |
| 223 | pdev->dev.platform_data = d; |
| 224 | } |
| 225 | return d ? 0 : -ENOMEM; |
| 226 | } |
| 227 | EXPORT_SYMBOL_GPL(platform_device_add_data); |
| 228 | |
| 229 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 230 | * platform_device_add - add a platform device to device hierarchy |
| 231 | * @pdev: platform device we're adding |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 233 | * This is part 2 of platform_device_register(), though may be called |
| 234 | * separately _iff_ pdev was allocated by platform_device_alloc(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | */ |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 236 | int platform_device_add(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | { |
| 238 | int i, ret = 0; |
| 239 | |
| 240 | if (!pdev) |
| 241 | return -EINVAL; |
| 242 | |
| 243 | if (!pdev->dev.parent) |
| 244 | pdev->dev.parent = &platform_bus; |
| 245 | |
| 246 | pdev->dev.bus = &platform_bus_type; |
| 247 | |
| 248 | if (pdev->id != -1) |
Jean Delvare | 1359555 | 2007-09-09 12:54:16 +0200 | [diff] [blame] | 249 | snprintf(pdev->dev.bus_id, BUS_ID_SIZE, "%s.%d", pdev->name, |
| 250 | pdev->id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | else |
| 252 | strlcpy(pdev->dev.bus_id, pdev->name, BUS_ID_SIZE); |
| 253 | |
| 254 | for (i = 0; i < pdev->num_resources; i++) { |
| 255 | struct resource *p, *r = &pdev->resource[i]; |
| 256 | |
| 257 | if (r->name == NULL) |
| 258 | r->name = pdev->dev.bus_id; |
| 259 | |
| 260 | p = r->parent; |
| 261 | if (!p) { |
| 262 | if (r->flags & IORESOURCE_MEM) |
| 263 | p = &iomem_resource; |
| 264 | else if (r->flags & IORESOURCE_IO) |
| 265 | p = &ioport_resource; |
| 266 | } |
| 267 | |
Kumar Gala | d960bb4 | 2005-11-28 10:15:39 -0600 | [diff] [blame] | 268 | if (p && insert_resource(p, r)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | printk(KERN_ERR |
| 270 | "%s: failed to claim resource %d\n", |
| 271 | pdev->dev.bus_id, i); |
| 272 | ret = -EBUSY; |
| 273 | goto failed; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | pr_debug("Registering platform device '%s'. Parent at %s\n", |
| 278 | pdev->dev.bus_id, pdev->dev.parent->bus_id); |
| 279 | |
Russell King | e391553 | 2006-05-06 08:15:26 +0100 | [diff] [blame] | 280 | ret = device_add(&pdev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | if (ret == 0) |
| 282 | return ret; |
| 283 | |
| 284 | failed: |
| 285 | while (--i >= 0) |
| 286 | if (pdev->resource[i].flags & (IORESOURCE_MEM|IORESOURCE_IO)) |
| 287 | release_resource(&pdev->resource[i]); |
| 288 | return ret; |
| 289 | } |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 290 | EXPORT_SYMBOL_GPL(platform_device_add); |
| 291 | |
| 292 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 293 | * platform_device_del - remove a platform-level device |
| 294 | * @pdev: platform device we're removing |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 295 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 296 | * Note that this function will also release all memory- and port-based |
| 297 | * resources owned by the device (@dev->resource). This function must |
| 298 | * _only_ be externally called in error cases. All other usage is a bug. |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 299 | */ |
| 300 | void platform_device_del(struct platform_device *pdev) |
| 301 | { |
| 302 | int i; |
| 303 | |
| 304 | if (pdev) { |
Jean Delvare | dc4c15d | 2007-05-02 20:55:54 +0200 | [diff] [blame] | 305 | device_del(&pdev->dev); |
| 306 | |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 307 | for (i = 0; i < pdev->num_resources; i++) { |
| 308 | struct resource *r = &pdev->resource[i]; |
| 309 | if (r->flags & (IORESOURCE_MEM|IORESOURCE_IO)) |
| 310 | release_resource(r); |
| 311 | } |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 312 | } |
| 313 | } |
| 314 | EXPORT_SYMBOL_GPL(platform_device_del); |
| 315 | |
| 316 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 317 | * platform_device_register - add a platform-level device |
| 318 | * @pdev: platform device we're adding |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 319 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 320 | int platform_device_register(struct platform_device *pdev) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 321 | { |
| 322 | device_initialize(&pdev->dev); |
| 323 | return platform_device_add(pdev); |
| 324 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 325 | EXPORT_SYMBOL_GPL(platform_device_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 328 | * platform_device_unregister - unregister a platform-level device |
| 329 | * @pdev: platform device we're unregistering |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 331 | * Unregistration is done in 2 steps. First we release all resources |
| 332 | * and remove it from the subsystem, then we drop reference count by |
| 333 | * calling platform_device_put(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 335 | void platform_device_unregister(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | { |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 337 | platform_device_del(pdev); |
| 338 | platform_device_put(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 340 | EXPORT_SYMBOL_GPL(platform_device_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 343 | * platform_device_register_simple |
| 344 | * @name: base name of the device we're adding |
| 345 | * @id: instance id |
| 346 | * @res: set of resources that needs to be allocated for the device |
| 347 | * @num: number of resources |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 349 | * This function creates a simple platform device that requires minimal |
| 350 | * resource and memory management. Canned release function freeing memory |
| 351 | * allocated for the device allows drivers using such devices to be |
| 352 | * unloaded without waiting for the last reference to the device to be |
| 353 | * dropped. |
David Brownell | 49a4ec1 | 2007-05-08 00:29:39 -0700 | [diff] [blame] | 354 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 355 | * This interface is primarily intended for use with legacy drivers which |
| 356 | * probe hardware directly. Because such drivers create sysfs device nodes |
| 357 | * themselves, rather than letting system infrastructure handle such device |
| 358 | * enumeration tasks, they don't fully conform to the Linux driver model. |
| 359 | * In particular, when such drivers are built as modules, they can't be |
| 360 | * "hotplugged". |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 362 | struct platform_device *platform_device_register_simple(const char *name, |
| 363 | int id, |
| 364 | struct resource *res, |
| 365 | unsigned int num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | { |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 367 | struct platform_device *pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | int retval; |
| 369 | |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 370 | pdev = platform_device_alloc(name, id); |
| 371 | if (!pdev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | retval = -ENOMEM; |
| 373 | goto error; |
| 374 | } |
| 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | if (num) { |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 377 | retval = platform_device_add_resources(pdev, res, num); |
| 378 | if (retval) |
| 379 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } |
| 381 | |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 382 | retval = platform_device_add(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | if (retval) |
| 384 | goto error; |
| 385 | |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 386 | return pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
| 388 | error: |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 389 | platform_device_put(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | return ERR_PTR(retval); |
| 391 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 392 | EXPORT_SYMBOL_GPL(platform_device_register_simple); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame^] | 394 | /** |
| 395 | * platform_device_register_data |
| 396 | * @parent: parent device for the device we're adding |
| 397 | * @name: base name of the device we're adding |
| 398 | * @id: instance id |
| 399 | * @data: platform specific data for this platform device |
| 400 | * @size: size of platform specific data |
| 401 | * |
| 402 | * This function creates a simple platform device that requires minimal |
| 403 | * resource and memory management. Canned release function freeing memory |
| 404 | * allocated for the device allows drivers using such devices to be |
| 405 | * unloaded without waiting for the last reference to the device to be |
| 406 | * dropped. |
| 407 | */ |
| 408 | struct platform_device *platform_device_register_data( |
| 409 | struct device *parent, |
| 410 | const char *name, int id, |
| 411 | const void *data, size_t size) |
| 412 | { |
| 413 | struct platform_device *pdev; |
| 414 | int retval; |
| 415 | |
| 416 | pdev = platform_device_alloc(name, id); |
| 417 | if (!pdev) { |
| 418 | retval = -ENOMEM; |
| 419 | goto error; |
| 420 | } |
| 421 | |
| 422 | pdev->dev.parent = parent; |
| 423 | |
| 424 | if (size) { |
| 425 | retval = platform_device_add_data(pdev, data, size); |
| 426 | if (retval) |
| 427 | goto error; |
| 428 | } |
| 429 | |
| 430 | retval = platform_device_add(pdev); |
| 431 | if (retval) |
| 432 | goto error; |
| 433 | |
| 434 | return pdev; |
| 435 | |
| 436 | error: |
| 437 | platform_device_put(pdev); |
| 438 | return ERR_PTR(retval); |
| 439 | } |
| 440 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 441 | static int platform_drv_probe(struct device *_dev) |
| 442 | { |
| 443 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 444 | struct platform_device *dev = to_platform_device(_dev); |
| 445 | |
| 446 | return drv->probe(dev); |
| 447 | } |
| 448 | |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 449 | static int platform_drv_probe_fail(struct device *_dev) |
| 450 | { |
| 451 | return -ENXIO; |
| 452 | } |
| 453 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 454 | static int platform_drv_remove(struct device *_dev) |
| 455 | { |
| 456 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 457 | struct platform_device *dev = to_platform_device(_dev); |
| 458 | |
| 459 | return drv->remove(dev); |
| 460 | } |
| 461 | |
| 462 | static void platform_drv_shutdown(struct device *_dev) |
| 463 | { |
| 464 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 465 | struct platform_device *dev = to_platform_device(_dev); |
| 466 | |
| 467 | drv->shutdown(dev); |
| 468 | } |
| 469 | |
| 470 | static int platform_drv_suspend(struct device *_dev, pm_message_t state) |
| 471 | { |
| 472 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 473 | struct platform_device *dev = to_platform_device(_dev); |
| 474 | |
| 475 | return drv->suspend(dev, state); |
| 476 | } |
| 477 | |
| 478 | static int platform_drv_resume(struct device *_dev) |
| 479 | { |
| 480 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 481 | struct platform_device *dev = to_platform_device(_dev); |
| 482 | |
| 483 | return drv->resume(dev); |
| 484 | } |
| 485 | |
| 486 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 487 | * platform_driver_register |
| 488 | * @drv: platform driver structure |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 489 | */ |
| 490 | int platform_driver_register(struct platform_driver *drv) |
| 491 | { |
| 492 | drv->driver.bus = &platform_bus_type; |
| 493 | if (drv->probe) |
| 494 | drv->driver.probe = platform_drv_probe; |
| 495 | if (drv->remove) |
| 496 | drv->driver.remove = platform_drv_remove; |
| 497 | if (drv->shutdown) |
| 498 | drv->driver.shutdown = platform_drv_shutdown; |
| 499 | if (drv->suspend) |
| 500 | drv->driver.suspend = platform_drv_suspend; |
| 501 | if (drv->resume) |
| 502 | drv->driver.resume = platform_drv_resume; |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 503 | if (drv->pm) |
| 504 | drv->driver.pm = &drv->pm->base; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 505 | return driver_register(&drv->driver); |
| 506 | } |
| 507 | EXPORT_SYMBOL_GPL(platform_driver_register); |
| 508 | |
| 509 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 510 | * platform_driver_unregister |
| 511 | * @drv: platform driver structure |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 512 | */ |
| 513 | void platform_driver_unregister(struct platform_driver *drv) |
| 514 | { |
| 515 | driver_unregister(&drv->driver); |
| 516 | } |
| 517 | EXPORT_SYMBOL_GPL(platform_driver_unregister); |
| 518 | |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 519 | /** |
| 520 | * platform_driver_probe - register driver for non-hotpluggable device |
| 521 | * @drv: platform driver structure |
| 522 | * @probe: the driver probe routine, probably from an __init section |
| 523 | * |
| 524 | * Use this instead of platform_driver_register() when you know the device |
| 525 | * is not hotpluggable and has already been registered, and you want to |
| 526 | * remove its run-once probe() infrastructure from memory after the driver |
| 527 | * has bound to the device. |
| 528 | * |
| 529 | * One typical use for this would be with drivers for controllers integrated |
| 530 | * into system-on-chip processors, where the controller devices have been |
| 531 | * configured as part of board setup. |
| 532 | * |
| 533 | * Returns zero if the driver registered and bound to a device, else returns |
| 534 | * a negative error code and with the driver not registered. |
| 535 | */ |
Andrew Morton | c63e078 | 2006-12-04 14:56:36 -0800 | [diff] [blame] | 536 | int __init_or_module platform_driver_probe(struct platform_driver *drv, |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 537 | int (*probe)(struct platform_device *)) |
| 538 | { |
| 539 | int retval, code; |
| 540 | |
| 541 | /* temporary section violation during probe() */ |
| 542 | drv->probe = probe; |
| 543 | retval = code = platform_driver_register(drv); |
| 544 | |
| 545 | /* Fixup that section violation, being paranoid about code scanning |
| 546 | * the list of drivers in order to probe new devices. Check to see |
| 547 | * if the probe was successful, and make sure any forced probes of |
| 548 | * new devices fail. |
| 549 | */ |
Greg Kroah-Hartman | c6f7e72 | 2007-11-01 19:41:16 -0700 | [diff] [blame] | 550 | spin_lock(&platform_bus_type.p->klist_drivers.k_lock); |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 551 | drv->probe = NULL; |
Greg Kroah-Hartman | e5dd127 | 2007-11-28 15:59:15 -0800 | [diff] [blame] | 552 | if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list)) |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 553 | retval = -ENODEV; |
| 554 | drv->driver.probe = platform_drv_probe_fail; |
Greg Kroah-Hartman | c6f7e72 | 2007-11-01 19:41:16 -0700 | [diff] [blame] | 555 | spin_unlock(&platform_bus_type.p->klist_drivers.k_lock); |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 556 | |
| 557 | if (code != retval) |
| 558 | platform_driver_unregister(drv); |
| 559 | return retval; |
| 560 | } |
| 561 | EXPORT_SYMBOL_GPL(platform_driver_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 563 | /* modalias support enables more hands-off userspace setup: |
| 564 | * (a) environment variable lets new-style hotplug events work once system is |
| 565 | * fully running: "modprobe $MODALIAS" |
| 566 | * (b) sysfs attribute lets new-style coldplug recover from hotplug events |
| 567 | * mishandled before system is fully running: "modprobe $(cat modalias)" |
| 568 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 569 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
| 570 | char *buf) |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 571 | { |
| 572 | struct platform_device *pdev = to_platform_device(dev); |
Kay Sievers | 43cc71e | 2007-08-18 04:40:39 +0200 | [diff] [blame] | 573 | int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 574 | |
| 575 | return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; |
| 576 | } |
| 577 | |
| 578 | static struct device_attribute platform_dev_attrs[] = { |
| 579 | __ATTR_RO(modalias), |
| 580 | __ATTR_NULL, |
| 581 | }; |
| 582 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 583 | static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 584 | { |
| 585 | struct platform_device *pdev = to_platform_device(dev); |
| 586 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 587 | add_uevent_var(env, "MODALIAS=platform:%s", pdev->name); |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 588 | return 0; |
| 589 | } |
| 590 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 592 | * platform_match - bind platform device to platform driver. |
| 593 | * @dev: device. |
| 594 | * @drv: driver. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 596 | * Platform device IDs are assumed to be encoded like this: |
| 597 | * "<name><instance>", where <name> is a short description of the type of |
| 598 | * device, like "pci" or "floppy", and <instance> is the enumerated |
| 599 | * instance of the device, like '0' or '42'. Driver IDs are simply |
| 600 | * "<name>". So, extract the <name> from the platform_device structure, |
| 601 | * and compare it against the name of the driver. Return whether they match |
| 602 | * or not. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 604 | static int platform_match(struct device *dev, struct device_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | { |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 606 | struct platform_device *pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 608 | pdev = container_of(dev, struct platform_device, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0); |
| 610 | } |
| 611 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 612 | #ifdef CONFIG_PM_SLEEP |
| 613 | |
| 614 | static int platform_legacy_suspend(struct device *dev, pm_message_t mesg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | { |
| 616 | int ret = 0; |
| 617 | |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 618 | if (dev->driver && dev->driver->suspend) |
David Brownell | 386415d | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 619 | ret = dev->driver->suspend(dev, mesg); |
| 620 | |
| 621 | return ret; |
| 622 | } |
| 623 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 624 | static int platform_legacy_suspend_late(struct device *dev, pm_message_t mesg) |
David Brownell | 386415d | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 625 | { |
| 626 | struct platform_driver *drv = to_platform_driver(dev->driver); |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 627 | struct platform_device *pdev; |
David Brownell | 386415d | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 628 | int ret = 0; |
| 629 | |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 630 | pdev = container_of(dev, struct platform_device, dev); |
David Brownell | 386415d | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 631 | if (dev->driver && drv->suspend_late) |
| 632 | ret = drv->suspend_late(pdev, mesg); |
| 633 | |
| 634 | return ret; |
| 635 | } |
| 636 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 637 | static int platform_legacy_resume_early(struct device *dev) |
David Brownell | 386415d | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 638 | { |
| 639 | struct platform_driver *drv = to_platform_driver(dev->driver); |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 640 | struct platform_device *pdev; |
David Brownell | 386415d | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 641 | int ret = 0; |
| 642 | |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 643 | pdev = container_of(dev, struct platform_device, dev); |
David Brownell | 386415d | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 644 | if (dev->driver && drv->resume_early) |
| 645 | ret = drv->resume_early(pdev); |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | return ret; |
| 648 | } |
| 649 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 650 | static int platform_legacy_resume(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | { |
| 652 | int ret = 0; |
| 653 | |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 654 | if (dev->driver && dev->driver->resume) |
| 655 | ret = dev->driver->resume(dev); |
| 656 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | return ret; |
| 658 | } |
| 659 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 660 | static int platform_pm_prepare(struct device *dev) |
| 661 | { |
| 662 | struct device_driver *drv = dev->driver; |
| 663 | int ret = 0; |
| 664 | |
| 665 | if (drv && drv->pm && drv->pm->prepare) |
| 666 | ret = drv->pm->prepare(dev); |
| 667 | |
| 668 | return ret; |
| 669 | } |
| 670 | |
| 671 | static void platform_pm_complete(struct device *dev) |
| 672 | { |
| 673 | struct device_driver *drv = dev->driver; |
| 674 | |
| 675 | if (drv && drv->pm && drv->pm->complete) |
| 676 | drv->pm->complete(dev); |
| 677 | } |
| 678 | |
| 679 | #ifdef CONFIG_SUSPEND |
| 680 | |
| 681 | static int platform_pm_suspend(struct device *dev) |
| 682 | { |
| 683 | struct device_driver *drv = dev->driver; |
| 684 | int ret = 0; |
| 685 | |
| 686 | if (drv && drv->pm) { |
| 687 | if (drv->pm->suspend) |
| 688 | ret = drv->pm->suspend(dev); |
| 689 | } else { |
| 690 | ret = platform_legacy_suspend(dev, PMSG_SUSPEND); |
| 691 | } |
| 692 | |
| 693 | return ret; |
| 694 | } |
| 695 | |
| 696 | static int platform_pm_suspend_noirq(struct device *dev) |
| 697 | { |
| 698 | struct platform_driver *pdrv; |
| 699 | int ret = 0; |
| 700 | |
| 701 | if (!dev->driver) |
| 702 | return 0; |
| 703 | |
| 704 | pdrv = to_platform_driver(dev->driver); |
| 705 | if (pdrv->pm) { |
| 706 | if (pdrv->pm->suspend_noirq) |
| 707 | ret = pdrv->pm->suspend_noirq(dev); |
| 708 | } else { |
| 709 | ret = platform_legacy_suspend_late(dev, PMSG_SUSPEND); |
| 710 | } |
| 711 | |
| 712 | return ret; |
| 713 | } |
| 714 | |
| 715 | static int platform_pm_resume(struct device *dev) |
| 716 | { |
| 717 | struct device_driver *drv = dev->driver; |
| 718 | int ret = 0; |
| 719 | |
| 720 | if (drv && drv->pm) { |
| 721 | if (drv->pm->resume) |
| 722 | ret = drv->pm->resume(dev); |
| 723 | } else { |
| 724 | ret = platform_legacy_resume(dev); |
| 725 | } |
| 726 | |
| 727 | return ret; |
| 728 | } |
| 729 | |
| 730 | static int platform_pm_resume_noirq(struct device *dev) |
| 731 | { |
| 732 | struct platform_driver *pdrv; |
| 733 | int ret = 0; |
| 734 | |
| 735 | if (!dev->driver) |
| 736 | return 0; |
| 737 | |
| 738 | pdrv = to_platform_driver(dev->driver); |
| 739 | if (pdrv->pm) { |
| 740 | if (pdrv->pm->resume_noirq) |
| 741 | ret = pdrv->pm->resume_noirq(dev); |
| 742 | } else { |
| 743 | ret = platform_legacy_resume_early(dev); |
| 744 | } |
| 745 | |
| 746 | return ret; |
| 747 | } |
| 748 | |
| 749 | #else /* !CONFIG_SUSPEND */ |
| 750 | |
| 751 | #define platform_pm_suspend NULL |
| 752 | #define platform_pm_resume NULL |
| 753 | #define platform_pm_suspend_noirq NULL |
| 754 | #define platform_pm_resume_noirq NULL |
| 755 | |
| 756 | #endif /* !CONFIG_SUSPEND */ |
| 757 | |
| 758 | #ifdef CONFIG_HIBERNATION |
| 759 | |
| 760 | static int platform_pm_freeze(struct device *dev) |
| 761 | { |
| 762 | struct device_driver *drv = dev->driver; |
| 763 | int ret = 0; |
| 764 | |
| 765 | if (!drv) |
| 766 | return 0; |
| 767 | |
| 768 | if (drv->pm) { |
| 769 | if (drv->pm->freeze) |
| 770 | ret = drv->pm->freeze(dev); |
| 771 | } else { |
| 772 | ret = platform_legacy_suspend(dev, PMSG_FREEZE); |
| 773 | } |
| 774 | |
| 775 | return ret; |
| 776 | } |
| 777 | |
| 778 | static int platform_pm_freeze_noirq(struct device *dev) |
| 779 | { |
| 780 | struct platform_driver *pdrv; |
| 781 | int ret = 0; |
| 782 | |
| 783 | if (!dev->driver) |
| 784 | return 0; |
| 785 | |
| 786 | pdrv = to_platform_driver(dev->driver); |
| 787 | if (pdrv->pm) { |
| 788 | if (pdrv->pm->freeze_noirq) |
| 789 | ret = pdrv->pm->freeze_noirq(dev); |
| 790 | } else { |
| 791 | ret = platform_legacy_suspend_late(dev, PMSG_FREEZE); |
| 792 | } |
| 793 | |
| 794 | return ret; |
| 795 | } |
| 796 | |
| 797 | static int platform_pm_thaw(struct device *dev) |
| 798 | { |
| 799 | struct device_driver *drv = dev->driver; |
| 800 | int ret = 0; |
| 801 | |
| 802 | if (drv && drv->pm) { |
| 803 | if (drv->pm->thaw) |
| 804 | ret = drv->pm->thaw(dev); |
| 805 | } else { |
| 806 | ret = platform_legacy_resume(dev); |
| 807 | } |
| 808 | |
| 809 | return ret; |
| 810 | } |
| 811 | |
| 812 | static int platform_pm_thaw_noirq(struct device *dev) |
| 813 | { |
| 814 | struct platform_driver *pdrv; |
| 815 | int ret = 0; |
| 816 | |
| 817 | if (!dev->driver) |
| 818 | return 0; |
| 819 | |
| 820 | pdrv = to_platform_driver(dev->driver); |
| 821 | if (pdrv->pm) { |
| 822 | if (pdrv->pm->thaw_noirq) |
| 823 | ret = pdrv->pm->thaw_noirq(dev); |
| 824 | } else { |
| 825 | ret = platform_legacy_resume_early(dev); |
| 826 | } |
| 827 | |
| 828 | return ret; |
| 829 | } |
| 830 | |
| 831 | static int platform_pm_poweroff(struct device *dev) |
| 832 | { |
| 833 | struct device_driver *drv = dev->driver; |
| 834 | int ret = 0; |
| 835 | |
| 836 | if (drv && drv->pm) { |
| 837 | if (drv->pm->poweroff) |
| 838 | ret = drv->pm->poweroff(dev); |
| 839 | } else { |
| 840 | ret = platform_legacy_suspend(dev, PMSG_HIBERNATE); |
| 841 | } |
| 842 | |
| 843 | return ret; |
| 844 | } |
| 845 | |
| 846 | static int platform_pm_poweroff_noirq(struct device *dev) |
| 847 | { |
| 848 | struct platform_driver *pdrv; |
| 849 | int ret = 0; |
| 850 | |
| 851 | if (!dev->driver) |
| 852 | return 0; |
| 853 | |
| 854 | pdrv = to_platform_driver(dev->driver); |
| 855 | if (pdrv->pm) { |
| 856 | if (pdrv->pm->poweroff_noirq) |
| 857 | ret = pdrv->pm->poweroff_noirq(dev); |
| 858 | } else { |
| 859 | ret = platform_legacy_suspend_late(dev, PMSG_HIBERNATE); |
| 860 | } |
| 861 | |
| 862 | return ret; |
| 863 | } |
| 864 | |
| 865 | static int platform_pm_restore(struct device *dev) |
| 866 | { |
| 867 | struct device_driver *drv = dev->driver; |
| 868 | int ret = 0; |
| 869 | |
| 870 | if (drv && drv->pm) { |
| 871 | if (drv->pm->restore) |
| 872 | ret = drv->pm->restore(dev); |
| 873 | } else { |
| 874 | ret = platform_legacy_resume(dev); |
| 875 | } |
| 876 | |
| 877 | return ret; |
| 878 | } |
| 879 | |
| 880 | static int platform_pm_restore_noirq(struct device *dev) |
| 881 | { |
| 882 | struct platform_driver *pdrv; |
| 883 | int ret = 0; |
| 884 | |
| 885 | if (!dev->driver) |
| 886 | return 0; |
| 887 | |
| 888 | pdrv = to_platform_driver(dev->driver); |
| 889 | if (pdrv->pm) { |
| 890 | if (pdrv->pm->restore_noirq) |
| 891 | ret = pdrv->pm->restore_noirq(dev); |
| 892 | } else { |
| 893 | ret = platform_legacy_resume_early(dev); |
| 894 | } |
| 895 | |
| 896 | return ret; |
| 897 | } |
| 898 | |
| 899 | #else /* !CONFIG_HIBERNATION */ |
| 900 | |
| 901 | #define platform_pm_freeze NULL |
| 902 | #define platform_pm_thaw NULL |
| 903 | #define platform_pm_poweroff NULL |
| 904 | #define platform_pm_restore NULL |
| 905 | #define platform_pm_freeze_noirq NULL |
| 906 | #define platform_pm_thaw_noirq NULL |
| 907 | #define platform_pm_poweroff_noirq NULL |
| 908 | #define platform_pm_restore_noirq NULL |
| 909 | |
| 910 | #endif /* !CONFIG_HIBERNATION */ |
| 911 | |
Adrian Bunk | ec748fa | 2008-07-21 22:33:36 +0300 | [diff] [blame] | 912 | static struct pm_ext_ops platform_pm_ops = { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 913 | .base = { |
| 914 | .prepare = platform_pm_prepare, |
| 915 | .complete = platform_pm_complete, |
| 916 | .suspend = platform_pm_suspend, |
| 917 | .resume = platform_pm_resume, |
| 918 | .freeze = platform_pm_freeze, |
| 919 | .thaw = platform_pm_thaw, |
| 920 | .poweroff = platform_pm_poweroff, |
| 921 | .restore = platform_pm_restore, |
| 922 | }, |
| 923 | .suspend_noirq = platform_pm_suspend_noirq, |
| 924 | .resume_noirq = platform_pm_resume_noirq, |
| 925 | .freeze_noirq = platform_pm_freeze_noirq, |
| 926 | .thaw_noirq = platform_pm_thaw_noirq, |
| 927 | .poweroff_noirq = platform_pm_poweroff_noirq, |
| 928 | .restore_noirq = platform_pm_restore_noirq, |
| 929 | }; |
| 930 | |
| 931 | #define PLATFORM_PM_OPS_PTR &platform_pm_ops |
| 932 | |
| 933 | #else /* !CONFIG_PM_SLEEP */ |
| 934 | |
| 935 | #define PLATFORM_PM_OPS_PTR NULL |
| 936 | |
| 937 | #endif /* !CONFIG_PM_SLEEP */ |
| 938 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | struct bus_type platform_bus_type = { |
| 940 | .name = "platform", |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 941 | .dev_attrs = platform_dev_attrs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | .match = platform_match, |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 943 | .uevent = platform_uevent, |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 944 | .pm = PLATFORM_PM_OPS_PTR, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | }; |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 946 | EXPORT_SYMBOL_GPL(platform_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | |
| 948 | int __init platform_bus_init(void) |
| 949 | { |
Cornelia Huck | fbfb144 | 2006-11-27 10:35:08 +0100 | [diff] [blame] | 950 | int error; |
| 951 | |
| 952 | error = device_register(&platform_bus); |
| 953 | if (error) |
| 954 | return error; |
| 955 | error = bus_register(&platform_bus_type); |
| 956 | if (error) |
| 957 | device_unregister(&platform_bus); |
| 958 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | } |
| 960 | |
| 961 | #ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK |
| 962 | u64 dma_get_required_mask(struct device *dev) |
| 963 | { |
| 964 | u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT); |
| 965 | u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT)); |
| 966 | u64 mask; |
| 967 | |
| 968 | if (!high_totalram) { |
| 969 | /* convert to mask just covering totalram */ |
| 970 | low_totalram = (1 << (fls(low_totalram) - 1)); |
| 971 | low_totalram += low_totalram - 1; |
| 972 | mask = low_totalram; |
| 973 | } else { |
| 974 | high_totalram = (1 << (fls(high_totalram) - 1)); |
| 975 | high_totalram += high_totalram - 1; |
| 976 | mask = (((u64)high_totalram) << 32) + 0xffffffff; |
| 977 | } |
James Bottomley | e88a0c2 | 2008-03-09 11:57:56 -0500 | [diff] [blame] | 978 | return mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | } |
| 980 | EXPORT_SYMBOL_GPL(dma_get_required_mask); |
| 981 | #endif |