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 | |
Andrew Morton | daa4122 | 2009-08-06 16:00:44 -0700 | [diff] [blame] | 13 | #include <linux/string.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 14 | #include <linux/platform_device.h> |
Grant Likely | 0521215 | 2010-06-08 07:48:20 -0600 | [diff] [blame] | 15 | #include <linux/of_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/dma-mapping.h> |
| 19 | #include <linux/bootmem.h> |
| 20 | #include <linux/err.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 21 | #include <linux/slab.h> |
Magnus Damm | 9d73022 | 2009-08-20 20:25:32 +0200 | [diff] [blame] | 22 | #include <linux/pm_runtime.h> |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 23 | #include <linux/idr.h> |
Mika Westerberg | 91e5687 | 2012-10-31 22:45:02 +0100 | [diff] [blame] | 24 | #include <linux/acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Ben Dooks | a1bdc7a | 2005-10-13 17:54:41 +0100 | [diff] [blame] | 26 | #include "base.h" |
Rafael J. Wysocki | bed2b42 | 2012-08-06 01:45:11 +0200 | [diff] [blame] | 27 | #include "power/power.h" |
Ben Dooks | a1bdc7a | 2005-10-13 17:54:41 +0100 | [diff] [blame] | 28 | |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 29 | /* For automatically allocated device IDs */ |
| 30 | static DEFINE_IDA(platform_devid_ida); |
| 31 | |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 32 | #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \ |
| 33 | driver)) |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | struct device platform_bus = { |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 36 | .init_name = "platform", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | }; |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 38 | EXPORT_SYMBOL_GPL(platform_bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | /** |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 41 | * arch_setup_pdev_archdata - Allow manipulation of archdata before its used |
Randy Dunlap | 7de636f | 2011-07-27 12:11:25 -0700 | [diff] [blame] | 42 | * @pdev: platform device |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 43 | * |
| 44 | * This is called before platform_device_add() such that any pdev_archdata may |
| 45 | * be setup before the platform_notifier is called. So if a user needs to |
| 46 | * manipulate any relevant information in the pdev_archdata they can do: |
| 47 | * |
Sebastian Andrzej Siewior | b1d6d82 | 2012-10-29 18:04:53 +0100 | [diff] [blame] | 48 | * platform_device_alloc() |
Fabio Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 49 | * ... manipulate ... |
| 50 | * platform_device_add() |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 51 | * |
| 52 | * And if they don't care they can just call platform_device_register() and |
| 53 | * everything will just work out. |
| 54 | */ |
| 55 | void __weak arch_setup_pdev_archdata(struct platform_device *pdev) |
| 56 | { |
| 57 | } |
| 58 | |
| 59 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 60 | * platform_get_resource - get a resource for a device |
| 61 | * @dev: platform device |
| 62 | * @type: resource type |
| 63 | * @num: resource index |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 65 | struct resource *platform_get_resource(struct platform_device *dev, |
| 66 | unsigned int type, unsigned int num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | { |
| 68 | int i; |
| 69 | |
| 70 | for (i = 0; i < dev->num_resources; i++) { |
| 71 | struct resource *r = &dev->resource[i]; |
| 72 | |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 73 | if (type == resource_type(r) && num-- == 0) |
| 74 | return r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | } |
| 76 | return NULL; |
| 77 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 78 | EXPORT_SYMBOL_GPL(platform_get_resource); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 81 | * platform_get_irq - get an IRQ for a device |
| 82 | * @dev: platform device |
| 83 | * @num: IRQ number index |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | */ |
| 85 | int platform_get_irq(struct platform_device *dev, unsigned int num) |
| 86 | { |
Andreas Larsson | 5cf8f7d | 2012-10-29 23:26:56 +0000 | [diff] [blame] | 87 | #ifdef CONFIG_SPARC |
| 88 | /* sparc does not have irqs represented as IORESOURCE_IRQ resources */ |
| 89 | if (!dev || num >= dev->archdata.num_irqs) |
| 90 | return -ENXIO; |
| 91 | return dev->archdata.irqs[num]; |
| 92 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | struct resource *r = platform_get_resource(dev, IORESOURCE_IRQ, num); |
| 94 | |
David Vrabel | 305b322 | 2006-01-19 17:52:27 +0000 | [diff] [blame] | 95 | return r ? r->start : -ENXIO; |
Andreas Larsson | 5cf8f7d | 2012-10-29 23:26:56 +0000 | [diff] [blame] | 96 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 98 | EXPORT_SYMBOL_GPL(platform_get_irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 101 | * platform_get_resource_byname - get a resource for a device by name |
| 102 | * @dev: platform device |
| 103 | * @type: resource type |
| 104 | * @name: resource name |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 106 | struct resource *platform_get_resource_byname(struct platform_device *dev, |
Linus Walleij | c0afe7b | 2009-04-27 02:38:16 +0200 | [diff] [blame] | 107 | unsigned int type, |
| 108 | const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | { |
| 110 | int i; |
| 111 | |
| 112 | for (i = 0; i < dev->num_resources; i++) { |
| 113 | struct resource *r = &dev->resource[i]; |
| 114 | |
Peter Ujfalusi | 1b8cb92 | 2012-08-23 17:10:00 +0300 | [diff] [blame] | 115 | if (unlikely(!r->name)) |
| 116 | continue; |
| 117 | |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 118 | if (type == resource_type(r) && !strcmp(r->name, name)) |
| 119 | return r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
| 121 | return NULL; |
| 122 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 123 | EXPORT_SYMBOL_GPL(platform_get_resource_byname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | /** |
Wolfram Sang | d6ff855 | 2012-11-13 17:47:13 +0100 | [diff] [blame] | 126 | * platform_get_irq_byname - get an IRQ for a device by name |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 127 | * @dev: platform device |
| 128 | * @name: IRQ name |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | */ |
Linus Walleij | c0afe7b | 2009-04-27 02:38:16 +0200 | [diff] [blame] | 130 | int platform_get_irq_byname(struct platform_device *dev, const char *name) |
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 | struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, |
| 133 | name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
David Vrabel | 305b322 | 2006-01-19 17:52:27 +0000 | [diff] [blame] | 135 | return r ? r->start : -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 137 | EXPORT_SYMBOL_GPL(platform_get_irq_byname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 140 | * platform_add_devices - add a numbers of platform devices |
| 141 | * @devs: array of platform devices to add |
| 142 | * @num: number of platform devices in array |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | */ |
| 144 | int platform_add_devices(struct platform_device **devs, int num) |
| 145 | { |
| 146 | int i, ret = 0; |
| 147 | |
| 148 | for (i = 0; i < num; i++) { |
| 149 | ret = platform_device_register(devs[i]); |
| 150 | if (ret) { |
| 151 | while (--i >= 0) |
| 152 | platform_device_unregister(devs[i]); |
| 153 | break; |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | return ret; |
| 158 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 159 | EXPORT_SYMBOL_GPL(platform_add_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 161 | struct platform_object { |
| 162 | struct platform_device pdev; |
| 163 | char name[1]; |
| 164 | }; |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 167 | * platform_device_put - destroy a platform device |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 168 | * @pdev: platform device to free |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 169 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 170 | * Free all memory associated with a platform device. This function must |
| 171 | * _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] | 172 | */ |
| 173 | void platform_device_put(struct platform_device *pdev) |
| 174 | { |
| 175 | if (pdev) |
| 176 | put_device(&pdev->dev); |
| 177 | } |
| 178 | EXPORT_SYMBOL_GPL(platform_device_put); |
| 179 | |
| 180 | static void platform_device_release(struct device *dev) |
| 181 | { |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 182 | struct platform_object *pa = container_of(dev, struct platform_object, |
| 183 | pdev.dev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 184 | |
Grant Likely | 7096d04 | 2010-10-20 11:45:13 -0600 | [diff] [blame] | 185 | of_device_node_put(&pa->pdev.dev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 186 | kfree(pa->pdev.dev.platform_data); |
Samuel Ortiz | e710d7d | 2011-04-08 00:43:01 +0200 | [diff] [blame] | 187 | kfree(pa->pdev.mfd_cell); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 188 | kfree(pa->pdev.resource); |
| 189 | kfree(pa); |
| 190 | } |
| 191 | |
| 192 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 193 | * platform_device_alloc - create a platform device |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 194 | * @name: base name of the device we're adding |
| 195 | * @id: instance id |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 196 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 197 | * Create a platform device object which can have other objects attached |
| 198 | * 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] | 199 | */ |
Jean Delvare | 1359555e | 2007-09-09 12:54:16 +0200 | [diff] [blame] | 200 | struct platform_device *platform_device_alloc(const char *name, int id) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 201 | { |
| 202 | struct platform_object *pa; |
| 203 | |
| 204 | pa = kzalloc(sizeof(struct platform_object) + strlen(name), GFP_KERNEL); |
| 205 | if (pa) { |
| 206 | strcpy(pa->name, name); |
| 207 | pa->pdev.name = pa->name; |
| 208 | pa->pdev.id = id; |
| 209 | device_initialize(&pa->pdev.dev); |
| 210 | pa->pdev.dev.release = platform_device_release; |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 211 | arch_setup_pdev_archdata(&pa->pdev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 212 | } |
| 213 | |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 214 | return pa ? &pa->pdev : NULL; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 215 | } |
| 216 | EXPORT_SYMBOL_GPL(platform_device_alloc); |
| 217 | |
| 218 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 219 | * platform_device_add_resources - add resources to a platform device |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 220 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
| 221 | * @res: set of resources that needs to be allocated for the device |
| 222 | * @num: number of resources |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 223 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 224 | * Add a copy of the resources to the platform device. The memory |
| 225 | * associated with the resources will be freed when the platform device is |
| 226 | * released. |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 227 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 228 | int platform_device_add_resources(struct platform_device *pdev, |
Geert Uytterhoeven | 0b7f1a7 | 2009-01-28 21:01:02 +0100 | [diff] [blame] | 229 | const struct resource *res, unsigned int num) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 230 | { |
Uwe Kleine-König | cea8962 | 2011-04-20 09:44:44 +0200 | [diff] [blame] | 231 | struct resource *r = NULL; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 232 | |
Uwe Kleine-König | cea8962 | 2011-04-20 09:44:44 +0200 | [diff] [blame] | 233 | if (res) { |
| 234 | r = kmemdup(res, sizeof(struct resource) * num, GFP_KERNEL); |
| 235 | if (!r) |
| 236 | return -ENOMEM; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 237 | } |
Uwe Kleine-König | cea8962 | 2011-04-20 09:44:44 +0200 | [diff] [blame] | 238 | |
Uwe Kleine-König | 4a03d6f | 2011-04-20 09:44:45 +0200 | [diff] [blame] | 239 | kfree(pdev->resource); |
Uwe Kleine-König | cea8962 | 2011-04-20 09:44:44 +0200 | [diff] [blame] | 240 | pdev->resource = r; |
| 241 | pdev->num_resources = num; |
| 242 | return 0; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 243 | } |
| 244 | EXPORT_SYMBOL_GPL(platform_device_add_resources); |
| 245 | |
| 246 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 247 | * platform_device_add_data - add platform-specific data to a platform device |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 248 | * @pdev: platform device allocated by platform_device_alloc to add resources to |
| 249 | * @data: platform specific data for this platform device |
| 250 | * @size: size of platform specific data |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 251 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 252 | * Add a copy of platform specific data to the platform device's |
| 253 | * platform_data pointer. The memory associated with the platform data |
| 254 | * will be freed when the platform device is released. |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 255 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 256 | int platform_device_add_data(struct platform_device *pdev, const void *data, |
| 257 | size_t size) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 258 | { |
Uwe Kleine-König | 27a33f9 | 2011-04-20 09:44:42 +0200 | [diff] [blame] | 259 | void *d = NULL; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 260 | |
Uwe Kleine-König | 27a33f9 | 2011-04-20 09:44:42 +0200 | [diff] [blame] | 261 | if (data) { |
| 262 | d = kmemdup(data, size, GFP_KERNEL); |
| 263 | if (!d) |
| 264 | return -ENOMEM; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 265 | } |
Uwe Kleine-König | 27a33f9 | 2011-04-20 09:44:42 +0200 | [diff] [blame] | 266 | |
Uwe Kleine-König | 251e031 | 2011-04-20 09:44:43 +0200 | [diff] [blame] | 267 | kfree(pdev->dev.platform_data); |
Uwe Kleine-König | 27a33f9 | 2011-04-20 09:44:42 +0200 | [diff] [blame] | 268 | pdev->dev.platform_data = d; |
| 269 | return 0; |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 270 | } |
| 271 | EXPORT_SYMBOL_GPL(platform_device_add_data); |
| 272 | |
| 273 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 274 | * platform_device_add - add a platform device to device hierarchy |
| 275 | * @pdev: platform device we're adding |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 277 | * This is part 2 of platform_device_register(), though may be called |
| 278 | * separately _iff_ pdev was allocated by platform_device_alloc(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | */ |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 280 | int platform_device_add(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 282 | int i, ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
| 284 | if (!pdev) |
| 285 | return -EINVAL; |
| 286 | |
| 287 | if (!pdev->dev.parent) |
| 288 | pdev->dev.parent = &platform_bus; |
| 289 | |
| 290 | pdev->dev.bus = &platform_bus_type; |
| 291 | |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 292 | switch (pdev->id) { |
| 293 | default: |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 294 | dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id); |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 295 | break; |
| 296 | case PLATFORM_DEVID_NONE: |
Greg Kroah-Hartman | acc0e90 | 2009-06-02 15:39:55 -0700 | [diff] [blame] | 297 | dev_set_name(&pdev->dev, "%s", pdev->name); |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 298 | break; |
| 299 | case PLATFORM_DEVID_AUTO: |
| 300 | /* |
| 301 | * Automatically allocated device ID. We mark it as such so |
| 302 | * that we remember it must be freed, and we append a suffix |
| 303 | * to avoid namespace collision with explicit IDs. |
| 304 | */ |
| 305 | ret = ida_simple_get(&platform_devid_ida, 0, 0, GFP_KERNEL); |
| 306 | if (ret < 0) |
| 307 | goto err_out; |
| 308 | pdev->id = ret; |
| 309 | pdev->id_auto = true; |
| 310 | dev_set_name(&pdev->dev, "%s.%d.auto", pdev->name, pdev->id); |
| 311 | break; |
| 312 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
| 314 | for (i = 0; i < pdev->num_resources; i++) { |
| 315 | struct resource *p, *r = &pdev->resource[i]; |
| 316 | |
| 317 | if (r->name == NULL) |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 318 | r->name = dev_name(&pdev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
| 320 | p = r->parent; |
| 321 | if (!p) { |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 322 | if (resource_type(r) == IORESOURCE_MEM) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | p = &iomem_resource; |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 324 | else if (resource_type(r) == IORESOURCE_IO) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | p = &ioport_resource; |
| 326 | } |
| 327 | |
Kumar Gala | d960bb4 | 2005-11-28 10:15:39 -0600 | [diff] [blame] | 328 | if (p && insert_resource(p, r)) { |
Fabio Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 329 | dev_err(&pdev->dev, "failed to claim resource %d\n", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | ret = -EBUSY; |
| 331 | goto failed; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | pr_debug("Registering platform device '%s'. Parent at %s\n", |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 336 | dev_name(&pdev->dev), dev_name(pdev->dev.parent)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Russell King | e391553 | 2006-05-06 08:15:26 +0100 | [diff] [blame] | 338 | ret = device_add(&pdev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (ret == 0) |
| 340 | return ret; |
| 341 | |
| 342 | failed: |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 343 | if (pdev->id_auto) { |
| 344 | ida_simple_remove(&platform_devid_ida, pdev->id); |
| 345 | pdev->id = PLATFORM_DEVID_AUTO; |
| 346 | } |
| 347 | |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 348 | while (--i >= 0) { |
| 349 | struct resource *r = &pdev->resource[i]; |
| 350 | unsigned long type = resource_type(r); |
| 351 | |
| 352 | if (type == IORESOURCE_MEM || type == IORESOURCE_IO) |
| 353 | release_resource(r); |
| 354 | } |
| 355 | |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 356 | err_out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | return ret; |
| 358 | } |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 359 | EXPORT_SYMBOL_GPL(platform_device_add); |
| 360 | |
| 361 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 362 | * platform_device_del - remove a platform-level device |
| 363 | * @pdev: platform device we're removing |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 364 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 365 | * Note that this function will also release all memory- and port-based |
| 366 | * resources owned by the device (@dev->resource). This function must |
| 367 | * _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] | 368 | */ |
| 369 | void platform_device_del(struct platform_device *pdev) |
| 370 | { |
| 371 | int i; |
| 372 | |
| 373 | if (pdev) { |
Jean Delvare | dc4c15d | 2007-05-02 20:55:54 +0200 | [diff] [blame] | 374 | device_del(&pdev->dev); |
| 375 | |
Jean Delvare | 689ae23 | 2012-07-27 22:14:59 +0200 | [diff] [blame] | 376 | if (pdev->id_auto) { |
| 377 | ida_simple_remove(&platform_devid_ida, pdev->id); |
| 378 | pdev->id = PLATFORM_DEVID_AUTO; |
| 379 | } |
| 380 | |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 381 | for (i = 0; i < pdev->num_resources; i++) { |
| 382 | struct resource *r = &pdev->resource[i]; |
Magnus Damm | c9f6616 | 2008-10-15 22:05:15 -0700 | [diff] [blame] | 383 | unsigned long type = resource_type(r); |
| 384 | |
| 385 | if (type == IORESOURCE_MEM || type == IORESOURCE_IO) |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 386 | release_resource(r); |
| 387 | } |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 388 | } |
| 389 | } |
| 390 | EXPORT_SYMBOL_GPL(platform_device_del); |
| 391 | |
| 392 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 393 | * platform_device_register - add a platform-level device |
| 394 | * @pdev: platform device we're adding |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 395 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 396 | int platform_device_register(struct platform_device *pdev) |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 397 | { |
| 398 | device_initialize(&pdev->dev); |
Kumar Gala | a77ce81 | 2011-06-10 01:52:57 -0500 | [diff] [blame] | 399 | arch_setup_pdev_archdata(pdev); |
Russell King | 37c12e7 | 2005-11-05 21:19:33 +0000 | [diff] [blame] | 400 | return platform_device_add(pdev); |
| 401 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 402 | EXPORT_SYMBOL_GPL(platform_device_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
| 404 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 405 | * platform_device_unregister - unregister a platform-level device |
| 406 | * @pdev: platform device we're unregistering |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 408 | * Unregistration is done in 2 steps. First we release all resources |
| 409 | * and remove it from the subsystem, then we drop reference count by |
| 410 | * calling platform_device_put(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 412 | void platform_device_unregister(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | { |
Dmitry Torokhov | 93ce306 | 2005-12-10 01:36:27 -0500 | [diff] [blame] | 414 | platform_device_del(pdev); |
| 415 | platform_device_put(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 417 | EXPORT_SYMBOL_GPL(platform_device_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | /** |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 420 | * platform_device_register_full - add a platform-level device with |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 421 | * resources and platform-specific data |
| 422 | * |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 423 | * @pdevinfo: data used to create device |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 424 | * |
Jani Nikula | f0eae0e | 2010-03-11 18:11:45 +0200 | [diff] [blame] | 425 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 426 | */ |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 427 | struct platform_device *platform_device_register_full( |
Uwe Kleine-König | 5a3072b | 2011-12-08 22:53:29 +0100 | [diff] [blame] | 428 | const struct platform_device_info *pdevinfo) |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 429 | { |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 430 | int ret = -ENOMEM; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 431 | struct platform_device *pdev; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 432 | |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 433 | pdev = platform_device_alloc(pdevinfo->name, pdevinfo->id); |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 434 | if (!pdev) |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 435 | goto err_alloc; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 436 | |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 437 | pdev->dev.parent = pdevinfo->parent; |
Rafael J. Wysocki | 863f9f3 | 2012-11-21 00:21:59 +0100 | [diff] [blame] | 438 | ACPI_HANDLE_SET(&pdev->dev, pdevinfo->acpi_node.handle); |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 439 | |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 440 | if (pdevinfo->dma_mask) { |
| 441 | /* |
| 442 | * This memory isn't freed when the device is put, |
| 443 | * I don't have a nice idea for that though. Conceptually |
| 444 | * dma_mask in struct device should not be a pointer. |
| 445 | * See http://thread.gmane.org/gmane.linux.kernel.pci/9081 |
| 446 | */ |
| 447 | pdev->dev.dma_mask = |
| 448 | kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL); |
| 449 | if (!pdev->dev.dma_mask) |
| 450 | goto err; |
| 451 | |
| 452 | *pdev->dev.dma_mask = pdevinfo->dma_mask; |
| 453 | pdev->dev.coherent_dma_mask = pdevinfo->dma_mask; |
| 454 | } |
| 455 | |
| 456 | ret = platform_device_add_resources(pdev, |
| 457 | pdevinfo->res, pdevinfo->num_res); |
Anton Vorontsov | 807508c | 2010-09-07 17:31:54 +0400 | [diff] [blame] | 458 | if (ret) |
| 459 | goto err; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 460 | |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 461 | ret = platform_device_add_data(pdev, |
| 462 | pdevinfo->data, pdevinfo->size_data); |
Anton Vorontsov | 807508c | 2010-09-07 17:31:54 +0400 | [diff] [blame] | 463 | if (ret) |
| 464 | goto err; |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 465 | |
| 466 | ret = platform_device_add(pdev); |
| 467 | if (ret) { |
| 468 | err: |
Rafael J. Wysocki | 863f9f3 | 2012-11-21 00:21:59 +0100 | [diff] [blame] | 469 | ACPI_HANDLE_SET(&pdev->dev, NULL); |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 470 | kfree(pdev->dev.dma_mask); |
| 471 | |
| 472 | err_alloc: |
Uwe Kleine-König | 44f28bd | 2010-06-21 16:11:44 +0200 | [diff] [blame] | 473 | platform_device_put(pdev); |
| 474 | return ERR_PTR(ret); |
| 475 | } |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 476 | |
| 477 | return pdev; |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 478 | } |
Uwe Kleine-König | 01dcc60 | 2011-08-25 11:16:00 +0200 | [diff] [blame] | 479 | EXPORT_SYMBOL_GPL(platform_device_register_full); |
Dmitry Baryshkov | d8bf254 | 2008-09-22 14:41:40 -0700 | [diff] [blame] | 480 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 481 | static int platform_drv_probe(struct device *_dev) |
| 482 | { |
| 483 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 484 | struct platform_device *dev = to_platform_device(_dev); |
Rafael J. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 485 | int ret; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 486 | |
Rafael J. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 487 | if (ACPI_HANDLE(_dev)) |
| 488 | acpi_dev_pm_attach(_dev, true); |
| 489 | |
| 490 | ret = drv->probe(dev); |
| 491 | if (ret && ACPI_HANDLE(_dev)) |
| 492 | acpi_dev_pm_detach(_dev, true); |
| 493 | |
| 494 | return ret; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 495 | } |
| 496 | |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 497 | static int platform_drv_probe_fail(struct device *_dev) |
| 498 | { |
| 499 | return -ENXIO; |
| 500 | } |
| 501 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 502 | static int platform_drv_remove(struct device *_dev) |
| 503 | { |
| 504 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 505 | struct platform_device *dev = to_platform_device(_dev); |
Rafael J. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 506 | int ret; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 507 | |
Rafael J. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 508 | ret = drv->remove(dev); |
| 509 | if (ACPI_HANDLE(_dev)) |
| 510 | acpi_dev_pm_detach(_dev, true); |
| 511 | |
| 512 | return ret; |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | static void platform_drv_shutdown(struct device *_dev) |
| 516 | { |
| 517 | struct platform_driver *drv = to_platform_driver(_dev->driver); |
| 518 | struct platform_device *dev = to_platform_device(_dev); |
| 519 | |
| 520 | drv->shutdown(dev); |
Rafael J. Wysocki | 94d76d5 | 2012-11-26 10:04:53 +0100 | [diff] [blame] | 521 | if (ACPI_HANDLE(_dev)) |
| 522 | acpi_dev_pm_detach(_dev, true); |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 523 | } |
| 524 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 525 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 526 | * platform_driver_register - register a driver for platform-level devices |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 527 | * @drv: platform driver structure |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 528 | */ |
| 529 | int platform_driver_register(struct platform_driver *drv) |
| 530 | { |
| 531 | drv->driver.bus = &platform_bus_type; |
| 532 | if (drv->probe) |
| 533 | drv->driver.probe = platform_drv_probe; |
| 534 | if (drv->remove) |
| 535 | drv->driver.remove = platform_drv_remove; |
| 536 | if (drv->shutdown) |
| 537 | drv->driver.shutdown = platform_drv_shutdown; |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 538 | |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 539 | return driver_register(&drv->driver); |
| 540 | } |
| 541 | EXPORT_SYMBOL_GPL(platform_driver_register); |
| 542 | |
| 543 | /** |
Ben Hutchings | 3c31f07 | 2010-02-14 14:18:53 +0000 | [diff] [blame] | 544 | * platform_driver_unregister - unregister a driver for platform-level devices |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 545 | * @drv: platform driver structure |
Russell King | 00d3dcd | 2005-11-09 17:23:39 +0000 | [diff] [blame] | 546 | */ |
| 547 | void platform_driver_unregister(struct platform_driver *drv) |
| 548 | { |
| 549 | driver_unregister(&drv->driver); |
| 550 | } |
| 551 | EXPORT_SYMBOL_GPL(platform_driver_unregister); |
| 552 | |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 553 | /** |
| 554 | * platform_driver_probe - register driver for non-hotpluggable device |
| 555 | * @drv: platform driver structure |
Fabio Porcedda | 647c86d | 2013-03-26 10:35:15 +0100 | [diff] [blame] | 556 | * @probe: the driver probe routine, probably from an __init section, |
| 557 | * must not return -EPROBE_DEFER. |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 558 | * |
| 559 | * Use this instead of platform_driver_register() when you know the device |
| 560 | * is not hotpluggable and has already been registered, and you want to |
| 561 | * remove its run-once probe() infrastructure from memory after the driver |
| 562 | * has bound to the device. |
| 563 | * |
| 564 | * One typical use for this would be with drivers for controllers integrated |
| 565 | * into system-on-chip processors, where the controller devices have been |
| 566 | * configured as part of board setup. |
| 567 | * |
Fabio Porcedda | 647c86d | 2013-03-26 10:35:15 +0100 | [diff] [blame] | 568 | * This is incompatible with deferred probing so probe() must not |
| 569 | * return -EPROBE_DEFER. |
| 570 | * |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 571 | * Returns zero if the driver registered and bound to a device, else returns |
| 572 | * a negative error code and with the driver not registered. |
| 573 | */ |
Andrew Morton | c63e078 | 2006-12-04 14:56:36 -0800 | [diff] [blame] | 574 | int __init_or_module platform_driver_probe(struct platform_driver *drv, |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 575 | int (*probe)(struct platform_device *)) |
| 576 | { |
| 577 | int retval, code; |
| 578 | |
Dmitry Torokhov | 1a6f2a7 | 2009-10-12 20:17:41 -0700 | [diff] [blame] | 579 | /* make sure driver won't have bind/unbind attributes */ |
| 580 | drv->driver.suppress_bind_attrs = true; |
| 581 | |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 582 | /* temporary section violation during probe() */ |
| 583 | drv->probe = probe; |
| 584 | retval = code = platform_driver_register(drv); |
| 585 | |
Dmitry Torokhov | 1a6f2a7 | 2009-10-12 20:17:41 -0700 | [diff] [blame] | 586 | /* |
| 587 | * Fixup that section violation, being paranoid about code scanning |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 588 | * the list of drivers in order to probe new devices. Check to see |
| 589 | * if the probe was successful, and make sure any forced probes of |
| 590 | * new devices fail. |
| 591 | */ |
Patrick Pannuto | d79d324 | 2010-08-06 17:12:41 -0700 | [diff] [blame] | 592 | spin_lock(&drv->driver.bus->p->klist_drivers.k_lock); |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 593 | drv->probe = NULL; |
Greg Kroah-Hartman | e5dd127 | 2007-11-28 15:59:15 -0800 | [diff] [blame] | 594 | if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list)) |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 595 | retval = -ENODEV; |
| 596 | drv->driver.probe = platform_drv_probe_fail; |
Patrick Pannuto | d79d324 | 2010-08-06 17:12:41 -0700 | [diff] [blame] | 597 | spin_unlock(&drv->driver.bus->p->klist_drivers.k_lock); |
David Brownell | c67334f | 2006-11-16 23:28:47 -0800 | [diff] [blame] | 598 | |
| 599 | if (code != retval) |
| 600 | platform_driver_unregister(drv); |
| 601 | return retval; |
| 602 | } |
| 603 | EXPORT_SYMBOL_GPL(platform_driver_probe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 605 | /** |
| 606 | * platform_create_bundle - register driver and create corresponding device |
| 607 | * @driver: platform driver structure |
| 608 | * @probe: the driver probe routine, probably from an __init section |
| 609 | * @res: set of resources that needs to be allocated for the device |
| 610 | * @n_res: number of resources |
| 611 | * @data: platform specific data for this platform device |
| 612 | * @size: size of platform specific data |
| 613 | * |
| 614 | * Use this in legacy-style modules that probe hardware directly and |
| 615 | * register a single platform device and corresponding platform driver. |
Jani Nikula | f0eae0e | 2010-03-11 18:11:45 +0200 | [diff] [blame] | 616 | * |
| 617 | * Returns &struct platform_device pointer on success, or ERR_PTR() on error. |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 618 | */ |
| 619 | struct platform_device * __init_or_module platform_create_bundle( |
| 620 | struct platform_driver *driver, |
| 621 | int (*probe)(struct platform_device *), |
| 622 | struct resource *res, unsigned int n_res, |
| 623 | const void *data, size_t size) |
| 624 | { |
| 625 | struct platform_device *pdev; |
| 626 | int error; |
| 627 | |
| 628 | pdev = platform_device_alloc(driver->driver.name, -1); |
| 629 | if (!pdev) { |
| 630 | error = -ENOMEM; |
| 631 | goto err_out; |
| 632 | } |
| 633 | |
Anton Vorontsov | 807508c | 2010-09-07 17:31:54 +0400 | [diff] [blame] | 634 | error = platform_device_add_resources(pdev, res, n_res); |
| 635 | if (error) |
| 636 | goto err_pdev_put; |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 637 | |
Anton Vorontsov | 807508c | 2010-09-07 17:31:54 +0400 | [diff] [blame] | 638 | error = platform_device_add_data(pdev, data, size); |
| 639 | if (error) |
| 640 | goto err_pdev_put; |
Dmitry Torokhov | ecdf6ce | 2009-12-29 20:11:20 -0800 | [diff] [blame] | 641 | |
| 642 | error = platform_device_add(pdev); |
| 643 | if (error) |
| 644 | goto err_pdev_put; |
| 645 | |
| 646 | error = platform_driver_probe(driver, probe); |
| 647 | if (error) |
| 648 | goto err_pdev_del; |
| 649 | |
| 650 | return pdev; |
| 651 | |
| 652 | err_pdev_del: |
| 653 | platform_device_del(pdev); |
| 654 | err_pdev_put: |
| 655 | platform_device_put(pdev); |
| 656 | err_out: |
| 657 | return ERR_PTR(error); |
| 658 | } |
| 659 | EXPORT_SYMBOL_GPL(platform_create_bundle); |
| 660 | |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 661 | /* modalias support enables more hands-off userspace setup: |
| 662 | * (a) environment variable lets new-style hotplug events work once system is |
| 663 | * fully running: "modprobe $MODALIAS" |
| 664 | * (b) sysfs attribute lets new-style coldplug recover from hotplug events |
| 665 | * mishandled before system is fully running: "modprobe $(cat modalias)" |
| 666 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 667 | static ssize_t modalias_show(struct device *dev, struct device_attribute *a, |
| 668 | char *buf) |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 669 | { |
| 670 | struct platform_device *pdev = to_platform_device(dev); |
Kay Sievers | 43cc71e | 2007-08-18 04:40:39 +0200 | [diff] [blame] | 671 | int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name); |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 672 | |
| 673 | return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len; |
| 674 | } |
| 675 | |
| 676 | static struct device_attribute platform_dev_attrs[] = { |
| 677 | __ATTR_RO(modalias), |
| 678 | __ATTR_NULL, |
| 679 | }; |
| 680 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 681 | static int platform_uevent(struct device *dev, struct kobj_uevent_env *env) |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 682 | { |
| 683 | struct platform_device *pdev = to_platform_device(dev); |
Grant Likely | eca3930 | 2010-06-08 07:48:21 -0600 | [diff] [blame] | 684 | int rc; |
| 685 | |
| 686 | /* Some devices have extra OF data and an OF-style MODALIAS */ |
Fabio Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 687 | rc = of_device_uevent_modalias(dev, env); |
Grant Likely | eca3930 | 2010-06-08 07:48:21 -0600 | [diff] [blame] | 688 | if (rc != -ENODEV) |
| 689 | return rc; |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 690 | |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 691 | add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX, |
Sebastian Andrzej Siewior | 0a26813 | 2011-08-15 16:51:22 +0200 | [diff] [blame] | 692 | pdev->name); |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 693 | return 0; |
| 694 | } |
| 695 | |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 696 | static const struct platform_device_id *platform_match_id( |
Uwe Kleine-König | 831fad2 | 2010-01-26 09:35:00 +0100 | [diff] [blame] | 697 | const struct platform_device_id *id, |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 698 | struct platform_device *pdev) |
| 699 | { |
| 700 | while (id->name[0]) { |
| 701 | if (strcmp(pdev->name, id->name) == 0) { |
| 702 | pdev->id_entry = id; |
| 703 | return id; |
| 704 | } |
| 705 | id++; |
| 706 | } |
| 707 | return NULL; |
| 708 | } |
| 709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | /** |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 711 | * platform_match - bind platform device to platform driver. |
| 712 | * @dev: device. |
| 713 | * @drv: driver. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | * |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 715 | * Platform device IDs are assumed to be encoded like this: |
| 716 | * "<name><instance>", where <name> is a short description of the type of |
| 717 | * device, like "pci" or "floppy", and <instance> is the enumerated |
| 718 | * instance of the device, like '0' or '42'. Driver IDs are simply |
| 719 | * "<name>". So, extract the <name> from the platform_device structure, |
| 720 | * and compare it against the name of the driver. Return whether they match |
| 721 | * or not. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | */ |
Greg Kroah-Hartman | 4a3ad20 | 2008-01-24 22:50:12 -0800 | [diff] [blame] | 723 | static int platform_match(struct device *dev, struct device_driver *drv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | { |
Eric Miao | 71b3e0c | 2009-01-31 22:47:44 +0800 | [diff] [blame] | 725 | struct platform_device *pdev = to_platform_device(dev); |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 726 | struct platform_driver *pdrv = to_platform_driver(drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
Grant Likely | 0521215 | 2010-06-08 07:48:20 -0600 | [diff] [blame] | 728 | /* Attempt an OF style match first */ |
| 729 | if (of_driver_match_device(dev, drv)) |
| 730 | return 1; |
| 731 | |
Mika Westerberg | 91e5687 | 2012-10-31 22:45:02 +0100 | [diff] [blame] | 732 | /* Then try ACPI style match */ |
| 733 | if (acpi_driver_match_device(dev, drv)) |
| 734 | return 1; |
| 735 | |
Grant Likely | 0521215 | 2010-06-08 07:48:20 -0600 | [diff] [blame] | 736 | /* Then try to match against the id table */ |
Eric Miao | 57fee4a | 2009-02-04 11:52:40 +0800 | [diff] [blame] | 737 | if (pdrv->id_table) |
| 738 | return platform_match_id(pdrv->id_table, pdev) != NULL; |
| 739 | |
| 740 | /* fall-back to driver name match */ |
Kay Sievers | 1e0b2cf | 2008-10-30 01:36:48 +0100 | [diff] [blame] | 741 | return (strcmp(pdev->name, drv->name) == 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | } |
| 743 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 744 | #ifdef CONFIG_PM_SLEEP |
| 745 | |
| 746 | static int platform_legacy_suspend(struct device *dev, pm_message_t mesg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | { |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 748 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
| 749 | struct platform_device *pdev = to_platform_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | int ret = 0; |
| 751 | |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 752 | if (dev->driver && pdrv->suspend) |
| 753 | ret = pdrv->suspend(pdev, mesg); |
David Brownell | 386415d | 2006-09-03 13:16:45 -0700 | [diff] [blame] | 754 | |
| 755 | return ret; |
| 756 | } |
| 757 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 758 | static int platform_legacy_resume(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | { |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 760 | struct platform_driver *pdrv = to_platform_driver(dev->driver); |
| 761 | struct platform_device *pdev = to_platform_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | int ret = 0; |
| 763 | |
Magnus Damm | 783ea7d | 2009-06-04 22:13:33 +0200 | [diff] [blame] | 764 | if (dev->driver && pdrv->resume) |
| 765 | ret = pdrv->resume(pdev); |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 766 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | return ret; |
| 768 | } |
| 769 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 770 | #endif /* CONFIG_PM_SLEEP */ |
Magnus Damm | 9d73022 | 2009-08-20 20:25:32 +0200 | [diff] [blame] | 771 | |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 772 | #ifdef CONFIG_SUSPEND |
| 773 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 774 | int platform_pm_suspend(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 775 | { |
| 776 | struct device_driver *drv = dev->driver; |
| 777 | int ret = 0; |
| 778 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 779 | if (!drv) |
| 780 | return 0; |
| 781 | |
| 782 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 783 | if (drv->pm->suspend) |
| 784 | ret = drv->pm->suspend(dev); |
| 785 | } else { |
| 786 | ret = platform_legacy_suspend(dev, PMSG_SUSPEND); |
| 787 | } |
| 788 | |
| 789 | return ret; |
| 790 | } |
| 791 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 792 | int platform_pm_resume(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 793 | { |
| 794 | struct device_driver *drv = dev->driver; |
| 795 | int ret = 0; |
| 796 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 797 | if (!drv) |
| 798 | return 0; |
| 799 | |
| 800 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 801 | if (drv->pm->resume) |
| 802 | ret = drv->pm->resume(dev); |
| 803 | } else { |
| 804 | ret = platform_legacy_resume(dev); |
| 805 | } |
| 806 | |
| 807 | return ret; |
| 808 | } |
| 809 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 810 | #endif /* CONFIG_SUSPEND */ |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 811 | |
Rafael J. Wysocki | 1f112ce | 2011-04-11 22:54:42 +0200 | [diff] [blame] | 812 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 813 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 814 | int platform_pm_freeze(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 815 | { |
| 816 | struct device_driver *drv = dev->driver; |
| 817 | int ret = 0; |
| 818 | |
| 819 | if (!drv) |
| 820 | return 0; |
| 821 | |
| 822 | if (drv->pm) { |
| 823 | if (drv->pm->freeze) |
| 824 | ret = drv->pm->freeze(dev); |
| 825 | } else { |
| 826 | ret = platform_legacy_suspend(dev, PMSG_FREEZE); |
| 827 | } |
| 828 | |
| 829 | return ret; |
| 830 | } |
| 831 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 832 | int platform_pm_thaw(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 833 | { |
| 834 | struct device_driver *drv = dev->driver; |
| 835 | int ret = 0; |
| 836 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 837 | if (!drv) |
| 838 | return 0; |
| 839 | |
| 840 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 841 | if (drv->pm->thaw) |
| 842 | ret = drv->pm->thaw(dev); |
| 843 | } else { |
| 844 | ret = platform_legacy_resume(dev); |
| 845 | } |
| 846 | |
| 847 | return ret; |
| 848 | } |
| 849 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 850 | int platform_pm_poweroff(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 851 | { |
| 852 | struct device_driver *drv = dev->driver; |
| 853 | int ret = 0; |
| 854 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 855 | if (!drv) |
| 856 | return 0; |
| 857 | |
| 858 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 859 | if (drv->pm->poweroff) |
| 860 | ret = drv->pm->poweroff(dev); |
| 861 | } else { |
| 862 | ret = platform_legacy_suspend(dev, PMSG_HIBERNATE); |
| 863 | } |
| 864 | |
| 865 | return ret; |
| 866 | } |
| 867 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 868 | int platform_pm_restore(struct device *dev) |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 869 | { |
| 870 | struct device_driver *drv = dev->driver; |
| 871 | int ret = 0; |
| 872 | |
Rafael J. Wysocki | adf0949 | 2008-10-06 22:46:05 +0200 | [diff] [blame] | 873 | if (!drv) |
| 874 | return 0; |
| 875 | |
| 876 | if (drv->pm) { |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 877 | if (drv->pm->restore) |
| 878 | ret = drv->pm->restore(dev); |
| 879 | } else { |
| 880 | ret = platform_legacy_resume(dev); |
| 881 | } |
| 882 | |
| 883 | return ret; |
| 884 | } |
| 885 | |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 886 | #endif /* CONFIG_HIBERNATE_CALLBACKS */ |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 887 | |
Dmitry Torokhov | d9ab771 | 2009-07-22 00:37:25 +0200 | [diff] [blame] | 888 | static const struct dev_pm_ops platform_dev_pm_ops = { |
Rafael J. Wysocki | 8b313a3 | 2011-04-29 00:36:32 +0200 | [diff] [blame] | 889 | .runtime_suspend = pm_generic_runtime_suspend, |
| 890 | .runtime_resume = pm_generic_runtime_resume, |
| 891 | .runtime_idle = pm_generic_runtime_idle, |
Rafael J. Wysocki | 69c9dd1 | 2011-04-29 00:36:05 +0200 | [diff] [blame] | 892 | USE_PLATFORM_PM_SLEEP_OPS |
Rafael J. Wysocki | 25e1849 | 2008-05-21 01:40:43 +0200 | [diff] [blame] | 893 | }; |
| 894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | struct bus_type platform_bus_type = { |
| 896 | .name = "platform", |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 897 | .dev_attrs = platform_dev_attrs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | .match = platform_match, |
David Brownell | a0245f7 | 2006-05-29 10:37:33 -0700 | [diff] [blame] | 899 | .uevent = platform_uevent, |
Magnus Damm | 9d73022 | 2009-08-20 20:25:32 +0200 | [diff] [blame] | 900 | .pm = &platform_dev_pm_ops, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | }; |
Dmitry Torokhov | a96b204 | 2005-12-10 01:36:28 -0500 | [diff] [blame] | 902 | EXPORT_SYMBOL_GPL(platform_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
| 904 | int __init platform_bus_init(void) |
| 905 | { |
Cornelia Huck | fbfb144 | 2006-11-27 10:35:08 +0100 | [diff] [blame] | 906 | int error; |
| 907 | |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 908 | early_platform_cleanup(); |
| 909 | |
Cornelia Huck | fbfb144 | 2006-11-27 10:35:08 +0100 | [diff] [blame] | 910 | error = device_register(&platform_bus); |
| 911 | if (error) |
| 912 | return error; |
| 913 | error = bus_register(&platform_bus_type); |
| 914 | if (error) |
| 915 | device_unregister(&platform_bus); |
| 916 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
| 918 | |
| 919 | #ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK |
| 920 | u64 dma_get_required_mask(struct device *dev) |
| 921 | { |
| 922 | u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT); |
| 923 | u32 high_totalram = ((max_pfn - 1) >> (32 - PAGE_SHIFT)); |
| 924 | u64 mask; |
| 925 | |
| 926 | if (!high_totalram) { |
| 927 | /* convert to mask just covering totalram */ |
| 928 | low_totalram = (1 << (fls(low_totalram) - 1)); |
| 929 | low_totalram += low_totalram - 1; |
| 930 | mask = low_totalram; |
| 931 | } else { |
| 932 | high_totalram = (1 << (fls(high_totalram) - 1)); |
| 933 | high_totalram += high_totalram - 1; |
| 934 | mask = (((u64)high_totalram) << 32) + 0xffffffff; |
| 935 | } |
James Bottomley | e88a0c2 | 2008-03-09 11:57:56 -0500 | [diff] [blame] | 936 | return mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | } |
| 938 | EXPORT_SYMBOL_GPL(dma_get_required_mask); |
| 939 | #endif |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 940 | |
| 941 | static __initdata LIST_HEAD(early_platform_driver_list); |
| 942 | static __initdata LIST_HEAD(early_platform_device_list); |
| 943 | |
| 944 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 945 | * early_platform_driver_register - register early platform driver |
Randy Dunlap | d86c130 | 2009-04-21 07:22:53 -0700 | [diff] [blame] | 946 | * @epdrv: early_platform driver structure |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 947 | * @buf: string passed from early_param() |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 948 | * |
| 949 | * Helper function for early_platform_init() / early_platform_init_buffer() |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 950 | */ |
| 951 | int __init early_platform_driver_register(struct early_platform_driver *epdrv, |
| 952 | char *buf) |
| 953 | { |
Magnus Damm | c60e050 | 2009-11-27 17:38:51 +0900 | [diff] [blame] | 954 | char *tmp; |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 955 | int n; |
| 956 | |
| 957 | /* Simply add the driver to the end of the global list. |
| 958 | * Drivers will by default be put on the list in compiled-in order. |
| 959 | */ |
| 960 | if (!epdrv->list.next) { |
| 961 | INIT_LIST_HEAD(&epdrv->list); |
| 962 | list_add_tail(&epdrv->list, &early_platform_driver_list); |
| 963 | } |
| 964 | |
| 965 | /* If the user has specified device then make sure the driver |
| 966 | * gets prioritized. The driver of the last device specified on |
| 967 | * command line will be put first on the list. |
| 968 | */ |
| 969 | n = strlen(epdrv->pdrv->driver.name); |
| 970 | if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) { |
| 971 | list_move(&epdrv->list, &early_platform_driver_list); |
| 972 | |
Magnus Damm | c60e050 | 2009-11-27 17:38:51 +0900 | [diff] [blame] | 973 | /* Allow passing parameters after device name */ |
| 974 | if (buf[n] == '\0' || buf[n] == ',') |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 975 | epdrv->requested_id = -1; |
Magnus Damm | c60e050 | 2009-11-27 17:38:51 +0900 | [diff] [blame] | 976 | else { |
| 977 | epdrv->requested_id = simple_strtoul(&buf[n + 1], |
| 978 | &tmp, 10); |
| 979 | |
| 980 | if (buf[n] != '.' || (tmp == &buf[n + 1])) { |
| 981 | epdrv->requested_id = EARLY_PLATFORM_ID_ERROR; |
| 982 | n = 0; |
| 983 | } else |
| 984 | n += strcspn(&buf[n + 1], ",") + 1; |
| 985 | } |
| 986 | |
| 987 | if (buf[n] == ',') |
| 988 | n++; |
| 989 | |
| 990 | if (epdrv->bufsize) { |
| 991 | memcpy(epdrv->buffer, &buf[n], |
| 992 | min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1)); |
| 993 | epdrv->buffer[epdrv->bufsize - 1] = '\0'; |
| 994 | } |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 995 | } |
| 996 | |
| 997 | return 0; |
| 998 | } |
| 999 | |
| 1000 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1001 | * early_platform_add_devices - adds a number of early platform devices |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1002 | * @devs: array of early platform devices to add |
| 1003 | * @num: number of early platform devices in array |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1004 | * |
| 1005 | * Used by early architecture code to register early platform devices and |
| 1006 | * their platform data. |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1007 | */ |
| 1008 | void __init early_platform_add_devices(struct platform_device **devs, int num) |
| 1009 | { |
| 1010 | struct device *dev; |
| 1011 | int i; |
| 1012 | |
| 1013 | /* simply add the devices to list */ |
| 1014 | for (i = 0; i < num; i++) { |
| 1015 | dev = &devs[i]->dev; |
| 1016 | |
| 1017 | if (!dev->devres_head.next) { |
Rafael J. Wysocki | bed2b42 | 2012-08-06 01:45:11 +0200 | [diff] [blame] | 1018 | pm_runtime_early_init(dev); |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1019 | INIT_LIST_HEAD(&dev->devres_head); |
| 1020 | list_add_tail(&dev->devres_head, |
| 1021 | &early_platform_device_list); |
| 1022 | } |
| 1023 | } |
| 1024 | } |
| 1025 | |
| 1026 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1027 | * early_platform_driver_register_all - register early platform drivers |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1028 | * @class_str: string to identify early platform driver class |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1029 | * |
| 1030 | * Used by architecture code to register all early platform drivers |
| 1031 | * for a certain class. If omitted then only early platform drivers |
| 1032 | * with matching kernel command line class parameters will be registered. |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1033 | */ |
| 1034 | void __init early_platform_driver_register_all(char *class_str) |
| 1035 | { |
| 1036 | /* The "class_str" parameter may or may not be present on the kernel |
| 1037 | * command line. If it is present then there may be more than one |
| 1038 | * matching parameter. |
| 1039 | * |
| 1040 | * Since we register our early platform drivers using early_param() |
| 1041 | * we need to make sure that they also get registered in the case |
| 1042 | * when the parameter is missing from the kernel command line. |
| 1043 | * |
| 1044 | * We use parse_early_options() to make sure the early_param() gets |
| 1045 | * called at least once. The early_param() may be called more than |
| 1046 | * once since the name of the preferred device may be specified on |
| 1047 | * the kernel command line. early_platform_driver_register() handles |
| 1048 | * this case for us. |
| 1049 | */ |
| 1050 | parse_early_options(class_str); |
| 1051 | } |
| 1052 | |
| 1053 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1054 | * early_platform_match - find early platform device matching driver |
Randy Dunlap | d86c130 | 2009-04-21 07:22:53 -0700 | [diff] [blame] | 1055 | * @epdrv: early platform driver structure |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1056 | * @id: id to match against |
| 1057 | */ |
| 1058 | static __init struct platform_device * |
| 1059 | early_platform_match(struct early_platform_driver *epdrv, int id) |
| 1060 | { |
| 1061 | struct platform_device *pd; |
| 1062 | |
| 1063 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) |
| 1064 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) |
| 1065 | if (pd->id == id) |
| 1066 | return pd; |
| 1067 | |
| 1068 | return NULL; |
| 1069 | } |
| 1070 | |
| 1071 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1072 | * early_platform_left - check if early platform driver has matching devices |
Randy Dunlap | d86c130 | 2009-04-21 07:22:53 -0700 | [diff] [blame] | 1073 | * @epdrv: early platform driver structure |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1074 | * @id: return true if id or above exists |
| 1075 | */ |
| 1076 | static __init int early_platform_left(struct early_platform_driver *epdrv, |
| 1077 | int id) |
| 1078 | { |
| 1079 | struct platform_device *pd; |
| 1080 | |
| 1081 | list_for_each_entry(pd, &early_platform_device_list, dev.devres_head) |
| 1082 | if (platform_match(&pd->dev, &epdrv->pdrv->driver)) |
| 1083 | if (pd->id >= id) |
| 1084 | return 1; |
| 1085 | |
| 1086 | return 0; |
| 1087 | } |
| 1088 | |
| 1089 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1090 | * early_platform_driver_probe_id - probe drivers matching class_str and id |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1091 | * @class_str: string to identify early platform driver class |
| 1092 | * @id: id to match against |
| 1093 | * @nr_probe: number of platform devices to successfully probe before exiting |
| 1094 | */ |
| 1095 | static int __init early_platform_driver_probe_id(char *class_str, |
| 1096 | int id, |
| 1097 | int nr_probe) |
| 1098 | { |
| 1099 | struct early_platform_driver *epdrv; |
| 1100 | struct platform_device *match; |
| 1101 | int match_id; |
| 1102 | int n = 0; |
| 1103 | int left = 0; |
| 1104 | |
| 1105 | list_for_each_entry(epdrv, &early_platform_driver_list, list) { |
| 1106 | /* only use drivers matching our class_str */ |
| 1107 | if (strcmp(class_str, epdrv->class_str)) |
| 1108 | continue; |
| 1109 | |
| 1110 | if (id == -2) { |
| 1111 | match_id = epdrv->requested_id; |
| 1112 | left = 1; |
| 1113 | |
| 1114 | } else { |
| 1115 | match_id = id; |
| 1116 | left += early_platform_left(epdrv, id); |
| 1117 | |
| 1118 | /* skip requested id */ |
| 1119 | switch (epdrv->requested_id) { |
| 1120 | case EARLY_PLATFORM_ID_ERROR: |
| 1121 | case EARLY_PLATFORM_ID_UNSET: |
| 1122 | break; |
| 1123 | default: |
| 1124 | if (epdrv->requested_id == id) |
| 1125 | match_id = EARLY_PLATFORM_ID_UNSET; |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | switch (match_id) { |
| 1130 | case EARLY_PLATFORM_ID_ERROR: |
Fabio Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 1131 | pr_warn("%s: unable to parse %s parameter\n", |
| 1132 | class_str, epdrv->pdrv->driver.name); |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1133 | /* fall-through */ |
| 1134 | case EARLY_PLATFORM_ID_UNSET: |
| 1135 | match = NULL; |
| 1136 | break; |
| 1137 | default: |
| 1138 | match = early_platform_match(epdrv, match_id); |
| 1139 | } |
| 1140 | |
| 1141 | if (match) { |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1142 | /* |
| 1143 | * Set up a sensible init_name to enable |
| 1144 | * dev_name() and others to be used before the |
| 1145 | * rest of the driver core is initialized. |
| 1146 | */ |
Paul Mundt | 06fe53b | 2010-05-13 17:56:56 +0900 | [diff] [blame] | 1147 | if (!match->dev.init_name && slab_is_available()) { |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1148 | if (match->id != -1) |
Paul Mundt | bd05086 | 2010-03-29 15:51:35 +0900 | [diff] [blame] | 1149 | match->dev.init_name = |
| 1150 | kasprintf(GFP_KERNEL, "%s.%d", |
| 1151 | match->name, |
| 1152 | match->id); |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1153 | else |
Paul Mundt | bd05086 | 2010-03-29 15:51:35 +0900 | [diff] [blame] | 1154 | match->dev.init_name = |
| 1155 | kasprintf(GFP_KERNEL, "%s", |
| 1156 | match->name); |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1157 | |
Paul Mundt | a636ee7 | 2010-03-09 06:57:53 +0000 | [diff] [blame] | 1158 | if (!match->dev.init_name) |
| 1159 | return -ENOMEM; |
| 1160 | } |
Paul Mundt | bd05086 | 2010-03-29 15:51:35 +0900 | [diff] [blame] | 1161 | |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1162 | if (epdrv->pdrv->probe(match)) |
Fabio Porcedda | 0258e18 | 2013-03-26 10:35:16 +0100 | [diff] [blame] | 1163 | pr_warn("%s: unable to probe %s early.\n", |
| 1164 | class_str, match->name); |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1165 | else |
| 1166 | n++; |
| 1167 | } |
| 1168 | |
| 1169 | if (n >= nr_probe) |
| 1170 | break; |
| 1171 | } |
| 1172 | |
| 1173 | if (left) |
| 1174 | return n; |
| 1175 | else |
| 1176 | return -ENODEV; |
| 1177 | } |
| 1178 | |
| 1179 | /** |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1180 | * early_platform_driver_probe - probe a class of registered drivers |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1181 | * @class_str: string to identify early platform driver class |
| 1182 | * @nr_probe: number of platform devices to successfully probe before exiting |
| 1183 | * @user_only: only probe user specified early platform devices |
Magnus Damm | 4d26e139 | 2010-03-10 20:50:38 +0900 | [diff] [blame] | 1184 | * |
| 1185 | * Used by architecture code to probe registered early platform drivers |
| 1186 | * within a certain class. For probe to happen a registered early platform |
| 1187 | * device matching a registered early platform driver is needed. |
Magnus Damm | 1397709 | 2009-03-30 14:37:25 -0700 | [diff] [blame] | 1188 | */ |
| 1189 | int __init early_platform_driver_probe(char *class_str, |
| 1190 | int nr_probe, |
| 1191 | int user_only) |
| 1192 | { |
| 1193 | int k, n, i; |
| 1194 | |
| 1195 | n = 0; |
| 1196 | for (i = -2; n < nr_probe; i++) { |
| 1197 | k = early_platform_driver_probe_id(class_str, i, nr_probe - n); |
| 1198 | |
| 1199 | if (k < 0) |
| 1200 | break; |
| 1201 | |
| 1202 | n += k; |
| 1203 | |
| 1204 | if (user_only) |
| 1205 | break; |
| 1206 | } |
| 1207 | |
| 1208 | return n; |
| 1209 | } |
| 1210 | |
| 1211 | /** |
| 1212 | * early_platform_cleanup - clean up early platform code |
| 1213 | */ |
| 1214 | void __init early_platform_cleanup(void) |
| 1215 | { |
| 1216 | struct platform_device *pd, *pd2; |
| 1217 | |
| 1218 | /* clean up the devres list used to chain devices */ |
| 1219 | list_for_each_entry_safe(pd, pd2, &early_platform_device_list, |
| 1220 | dev.devres_head) { |
| 1221 | list_del(&pd->dev.devres_head); |
| 1222 | memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head)); |
| 1223 | } |
| 1224 | } |
| 1225 | |