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1 : : /* SPDX-License-Identifier: GPL-2.0-only */
2 : : /*
3 : : * platform_device.h - generic, centralized driver model
4 : : *
5 : : * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
6 : : *
7 : : * See Documentation/driver-api/driver-model/ for more information.
8 : : */
9 : :
10 : : #ifndef _PLATFORM_DEVICE_H_
11 : : #define _PLATFORM_DEVICE_H_
12 : :
13 : : #include <linux/device.h>
14 : :
15 : : #define PLATFORM_DEVID_NONE (-1)
16 : : #define PLATFORM_DEVID_AUTO (-2)
17 : :
18 : : struct mfd_cell;
19 : : struct property_entry;
20 : : struct platform_device_id;
21 : :
22 : : struct platform_device {
23 : : const char *name;
24 : : int id;
25 : : bool id_auto;
26 : : struct device dev;
27 : : u64 platform_dma_mask;
28 : : u32 num_resources;
29 : : struct resource *resource;
30 : :
31 : : const struct platform_device_id *id_entry;
32 : : char *driver_override; /* Driver name to force a match */
33 : :
34 : : /* MFD cell pointer */
35 : : struct mfd_cell *mfd_cell;
36 : :
37 : : /* arch specific additions */
38 : : struct pdev_archdata archdata;
39 : : };
40 : :
41 : : #define platform_get_device_id(pdev) ((pdev)->id_entry)
42 : :
43 : : #define dev_is_platform(dev) ((dev)->bus == &platform_bus_type)
44 : : #define to_platform_device(x) container_of((x), struct platform_device, dev)
45 : :
46 : : extern int platform_device_register(struct platform_device *);
47 : : extern void platform_device_unregister(struct platform_device *);
48 : :
49 : : extern struct bus_type platform_bus_type;
50 : : extern struct device platform_bus;
51 : :
52 : : extern struct resource *platform_get_resource(struct platform_device *,
53 : : unsigned int, unsigned int);
54 : : extern struct device *
55 : : platform_find_device_by_driver(struct device *start,
56 : : const struct device_driver *drv);
57 : : extern void __iomem *
58 : : devm_platform_ioremap_resource(struct platform_device *pdev,
59 : : unsigned int index);
60 : : extern void __iomem *
61 : : devm_platform_ioremap_resource_wc(struct platform_device *pdev,
62 : : unsigned int index);
63 : : extern void __iomem *
64 : : devm_platform_ioremap_resource_byname(struct platform_device *pdev,
65 : : const char *name);
66 : : extern int platform_get_irq(struct platform_device *, unsigned int);
67 : : extern int platform_get_irq_optional(struct platform_device *, unsigned int);
68 : : extern int platform_irq_count(struct platform_device *);
69 : : extern struct resource *platform_get_resource_byname(struct platform_device *,
70 : : unsigned int,
71 : : const char *);
72 : : extern int platform_get_irq_byname(struct platform_device *, const char *);
73 : : extern int platform_get_irq_byname_optional(struct platform_device *dev,
74 : : const char *name);
75 : : extern int platform_add_devices(struct platform_device **, int);
76 : :
77 : : struct platform_device_info {
78 : : struct device *parent;
79 : : struct fwnode_handle *fwnode;
80 : : bool of_node_reused;
81 : :
82 : : const char *name;
83 : : int id;
84 : :
85 : : const struct resource *res;
86 : : unsigned int num_res;
87 : :
88 : : const void *data;
89 : : size_t size_data;
90 : : u64 dma_mask;
91 : :
92 : : struct property_entry *properties;
93 : : };
94 : : extern struct platform_device *platform_device_register_full(
95 : : const struct platform_device_info *pdevinfo);
96 : :
97 : : /**
98 : : * platform_device_register_resndata - add a platform-level device with
99 : : * resources and platform-specific data
100 : : *
101 : : * @parent: parent device for the device we're adding
102 : : * @name: base name of the device we're adding
103 : : * @id: instance id
104 : : * @res: set of resources that needs to be allocated for the device
105 : : * @num: number of resources
106 : : * @data: platform specific data for this platform device
107 : : * @size: size of platform specific data
108 : : *
109 : : * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
110 : : */
111 : 312 : static inline struct platform_device *platform_device_register_resndata(
112 : : struct device *parent, const char *name, int id,
113 : : const struct resource *res, unsigned int num,
114 : : const void *data, size_t size) {
115 : :
116 : 312 : struct platform_device_info pdevinfo = {
117 : : .parent = parent,
118 : : .name = name,
119 : : .id = id,
120 : : .res = res,
121 : : .num_res = num,
122 : : .data = data,
123 : : .size_data = size,
124 : : .dma_mask = 0,
125 : : };
126 : :
127 : 312 : return platform_device_register_full(&pdevinfo);
128 : : }
129 : :
130 : : /**
131 : : * platform_device_register_simple - add a platform-level device and its resources
132 : : * @name: base name of the device we're adding
133 : : * @id: instance id
134 : : * @res: set of resources that needs to be allocated for the device
135 : : * @num: number of resources
136 : : *
137 : : * This function creates a simple platform device that requires minimal
138 : : * resource and memory management. Canned release function freeing memory
139 : : * allocated for the device allows drivers using such devices to be
140 : : * unloaded without waiting for the last reference to the device to be
141 : : * dropped.
142 : : *
143 : : * This interface is primarily intended for use with legacy drivers which
144 : : * probe hardware directly. Because such drivers create sysfs device nodes
145 : : * themselves, rather than letting system infrastructure handle such device
146 : : * enumeration tasks, they don't fully conform to the Linux driver model.
147 : : * In particular, when such drivers are built as modules, they can't be
148 : : * "hotplugged".
149 : : *
150 : : * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
151 : : */
152 : 156 : static inline struct platform_device *platform_device_register_simple(
153 : : const char *name, int id,
154 : : const struct resource *res, unsigned int num)
155 : : {
156 : 156 : return platform_device_register_resndata(NULL, name, id,
157 : : res, num, NULL, 0);
158 : : }
159 : :
160 : : /**
161 : : * platform_device_register_data - add a platform-level device with platform-specific data
162 : : * @parent: parent device for the device we're adding
163 : : * @name: base name of the device we're adding
164 : : * @id: instance id
165 : : * @data: platform specific data for this platform device
166 : : * @size: size of platform specific data
167 : : *
168 : : * This function creates a simple platform device that requires minimal
169 : : * resource and memory management. Canned release function freeing memory
170 : : * allocated for the device allows drivers using such devices to be
171 : : * unloaded without waiting for the last reference to the device to be
172 : : * dropped.
173 : : *
174 : : * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
175 : : */
176 : 78 : static inline struct platform_device *platform_device_register_data(
177 : : struct device *parent, const char *name, int id,
178 : : const void *data, size_t size)
179 : : {
180 : 78 : return platform_device_register_resndata(parent, name, id,
181 : : NULL, 0, data, size);
182 : : }
183 : :
184 : : extern struct platform_device *platform_device_alloc(const char *name, int id);
185 : : extern int platform_device_add_resources(struct platform_device *pdev,
186 : : const struct resource *res,
187 : : unsigned int num);
188 : : extern int platform_device_add_data(struct platform_device *pdev,
189 : : const void *data, size_t size);
190 : : extern int platform_device_add_properties(struct platform_device *pdev,
191 : : const struct property_entry *properties);
192 : : extern int platform_device_add(struct platform_device *pdev);
193 : : extern void platform_device_del(struct platform_device *pdev);
194 : : extern void platform_device_put(struct platform_device *pdev);
195 : :
196 : : struct platform_driver {
197 : : int (*probe)(struct platform_device *);
198 : : int (*remove)(struct platform_device *);
199 : : void (*shutdown)(struct platform_device *);
200 : : int (*suspend)(struct platform_device *, pm_message_t state);
201 : : int (*resume)(struct platform_device *);
202 : : struct device_driver driver;
203 : : const struct platform_device_id *id_table;
204 : : bool prevent_deferred_probe;
205 : : };
206 : :
207 : : #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
208 : : driver))
209 : :
210 : : /*
211 : : * use a macro to avoid include chaining to get THIS_MODULE
212 : : */
213 : : #define platform_driver_register(drv) \
214 : : __platform_driver_register(drv, THIS_MODULE)
215 : : extern int __platform_driver_register(struct platform_driver *,
216 : : struct module *);
217 : : extern void platform_driver_unregister(struct platform_driver *);
218 : :
219 : : /* non-hotpluggable platform devices may use this so that probe() and
220 : : * its support may live in __init sections, conserving runtime memory.
221 : : */
222 : : #define platform_driver_probe(drv, probe) \
223 : : __platform_driver_probe(drv, probe, THIS_MODULE)
224 : : extern int __platform_driver_probe(struct platform_driver *driver,
225 : : int (*probe)(struct platform_device *), struct module *module);
226 : :
227 : 0 : static inline void *platform_get_drvdata(const struct platform_device *pdev)
228 : : {
229 [ # # ]: 0 : return dev_get_drvdata(&pdev->dev);
230 : : }
231 : :
232 : 0 : static inline void platform_set_drvdata(struct platform_device *pdev,
233 : : void *data)
234 : : {
235 : 0 : dev_set_drvdata(&pdev->dev, data);
236 : : }
237 : :
238 : : /* module_platform_driver() - Helper macro for drivers that don't do
239 : : * anything special in module init/exit. This eliminates a lot of
240 : : * boilerplate. Each module may only use this macro once, and
241 : : * calling it replaces module_init() and module_exit()
242 : : */
243 : : #define module_platform_driver(__platform_driver) \
244 : : module_driver(__platform_driver, platform_driver_register, \
245 : : platform_driver_unregister)
246 : :
247 : : /* builtin_platform_driver() - Helper macro for builtin drivers that
248 : : * don't do anything special in driver init. This eliminates some
249 : : * boilerplate. Each driver may only use this macro once, and
250 : : * calling it replaces device_initcall(). Note this is meant to be
251 : : * a parallel of module_platform_driver() above, but w/o _exit stuff.
252 : : */
253 : : #define builtin_platform_driver(__platform_driver) \
254 : : builtin_driver(__platform_driver, platform_driver_register)
255 : :
256 : : /* module_platform_driver_probe() - Helper macro for drivers that don't do
257 : : * anything special in module init/exit. This eliminates a lot of
258 : : * boilerplate. Each module may only use this macro once, and
259 : : * calling it replaces module_init() and module_exit()
260 : : */
261 : : #define module_platform_driver_probe(__platform_driver, __platform_probe) \
262 : : static int __init __platform_driver##_init(void) \
263 : : { \
264 : : return platform_driver_probe(&(__platform_driver), \
265 : : __platform_probe); \
266 : : } \
267 : : module_init(__platform_driver##_init); \
268 : : static void __exit __platform_driver##_exit(void) \
269 : : { \
270 : : platform_driver_unregister(&(__platform_driver)); \
271 : : } \
272 : : module_exit(__platform_driver##_exit);
273 : :
274 : : /* builtin_platform_driver_probe() - Helper macro for drivers that don't do
275 : : * anything special in device init. This eliminates some boilerplate. Each
276 : : * driver may only use this macro once, and using it replaces device_initcall.
277 : : * This is meant to be a parallel of module_platform_driver_probe above, but
278 : : * without the __exit parts.
279 : : */
280 : : #define builtin_platform_driver_probe(__platform_driver, __platform_probe) \
281 : : static int __init __platform_driver##_init(void) \
282 : : { \
283 : : return platform_driver_probe(&(__platform_driver), \
284 : : __platform_probe); \
285 : : } \
286 : : device_initcall(__platform_driver##_init); \
287 : :
288 : : #define platform_create_bundle(driver, probe, res, n_res, data, size) \
289 : : __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE)
290 : : extern struct platform_device *__platform_create_bundle(
291 : : struct platform_driver *driver, int (*probe)(struct platform_device *),
292 : : struct resource *res, unsigned int n_res,
293 : : const void *data, size_t size, struct module *module);
294 : :
295 : : int __platform_register_drivers(struct platform_driver * const *drivers,
296 : : unsigned int count, struct module *owner);
297 : : void platform_unregister_drivers(struct platform_driver * const *drivers,
298 : : unsigned int count);
299 : :
300 : : #define platform_register_drivers(drivers, count) \
301 : : __platform_register_drivers(drivers, count, THIS_MODULE)
302 : :
303 : : #ifdef CONFIG_SUSPEND
304 : : extern int platform_pm_suspend(struct device *dev);
305 : : extern int platform_pm_resume(struct device *dev);
306 : : #else
307 : : #define platform_pm_suspend NULL
308 : : #define platform_pm_resume NULL
309 : : #endif
310 : :
311 : : #ifdef CONFIG_HIBERNATE_CALLBACKS
312 : : extern int platform_pm_freeze(struct device *dev);
313 : : extern int platform_pm_thaw(struct device *dev);
314 : : extern int platform_pm_poweroff(struct device *dev);
315 : : extern int platform_pm_restore(struct device *dev);
316 : : #else
317 : : #define platform_pm_freeze NULL
318 : : #define platform_pm_thaw NULL
319 : : #define platform_pm_poweroff NULL
320 : : #define platform_pm_restore NULL
321 : : #endif
322 : :
323 : : extern int platform_dma_configure(struct device *dev);
324 : :
325 : : #ifdef CONFIG_PM_SLEEP
326 : : #define USE_PLATFORM_PM_SLEEP_OPS \
327 : : .suspend = platform_pm_suspend, \
328 : : .resume = platform_pm_resume, \
329 : : .freeze = platform_pm_freeze, \
330 : : .thaw = platform_pm_thaw, \
331 : : .poweroff = platform_pm_poweroff, \
332 : : .restore = platform_pm_restore,
333 : : #else
334 : : #define USE_PLATFORM_PM_SLEEP_OPS
335 : : #endif
336 : :
337 : : #ifndef CONFIG_SUPERH
338 : : /*
339 : : * REVISIT: This stub is needed for all non-SuperH users of early platform
340 : : * drivers. It should go away once we introduce the new platform_device-based
341 : : * early driver framework.
342 : : */
343 : : static inline int is_sh_early_platform_device(struct platform_device *pdev)
344 : : {
345 : : return 0;
346 : : }
347 : : #endif /* CONFIG_SUPERH */
348 : :
349 : : #endif /* _PLATFORM_DEVICE_H_ */
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