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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 int platform_get_irq(struct platform_device *, unsigned int);
61 : : extern int platform_get_irq_optional(struct platform_device *, unsigned int);
62 : : extern int platform_irq_count(struct platform_device *);
63 : : extern struct resource *platform_get_resource_byname(struct platform_device *,
64 : : unsigned int,
65 : : const char *);
66 : : extern int platform_get_irq_byname(struct platform_device *, const char *);
67 : : extern int platform_get_irq_byname_optional(struct platform_device *dev,
68 : : const char *name);
69 : : extern int platform_add_devices(struct platform_device **, int);
70 : :
71 : : struct platform_device_info {
72 : : struct device *parent;
73 : : struct fwnode_handle *fwnode;
74 : : bool of_node_reused;
75 : :
76 : : const char *name;
77 : : int id;
78 : :
79 : : const struct resource *res;
80 : : unsigned int num_res;
81 : :
82 : : const void *data;
83 : : size_t size_data;
84 : : u64 dma_mask;
85 : :
86 : : struct property_entry *properties;
87 : : };
88 : : extern struct platform_device *platform_device_register_full(
89 : : const struct platform_device_info *pdevinfo);
90 : :
91 : : /**
92 : : * platform_device_register_resndata - add a platform-level device with
93 : : * resources and platform-specific data
94 : : *
95 : : * @parent: parent device for the device we're adding
96 : : * @name: base name of the device we're adding
97 : : * @id: instance id
98 : : * @res: set of resources that needs to be allocated for the device
99 : : * @num: number of resources
100 : : * @data: platform specific data for this platform device
101 : : * @size: size of platform specific data
102 : : *
103 : : * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
104 : : */
105 : : static inline struct platform_device *platform_device_register_resndata(
106 : : struct device *parent, const char *name, int id,
107 : : const struct resource *res, unsigned int num,
108 : : const void *data, size_t size) {
109 : :
110 : 1616 : struct platform_device_info pdevinfo = {
111 : : .parent = parent,
112 : : .name = name,
113 : : .id = id,
114 : : .res = res,
115 : : .num_res = num,
116 : : .data = data,
117 : : .size_data = size,
118 : : .dma_mask = 0,
119 : : };
120 : :
121 : 1616 : return platform_device_register_full(&pdevinfo);
122 : : }
123 : :
124 : : /**
125 : : * platform_device_register_simple - add a platform-level device and its resources
126 : : * @name: base name of the device we're adding
127 : : * @id: instance id
128 : : * @res: set of resources that needs to be allocated for the device
129 : : * @num: number of resources
130 : : *
131 : : * This function creates a simple platform device that requires minimal
132 : : * resource and memory management. Canned release function freeing memory
133 : : * allocated for the device allows drivers using such devices to be
134 : : * unloaded without waiting for the last reference to the device to be
135 : : * dropped.
136 : : *
137 : : * This interface is primarily intended for use with legacy drivers which
138 : : * probe hardware directly. Because such drivers create sysfs device nodes
139 : : * themselves, rather than letting system infrastructure handle such device
140 : : * enumeration tasks, they don't fully conform to the Linux driver model.
141 : : * In particular, when such drivers are built as modules, they can't be
142 : : * "hotplugged".
143 : : *
144 : : * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
145 : : */
146 : : static inline struct platform_device *platform_device_register_simple(
147 : : const char *name, int id,
148 : : const struct resource *res, unsigned int num)
149 : : {
150 : : return platform_device_register_resndata(NULL, name, id,
151 : : res, num, NULL, 0);
152 : : }
153 : :
154 : : /**
155 : : * platform_device_register_data - add a platform-level device with platform-specific data
156 : : * @parent: parent device for the device we're adding
157 : : * @name: base name of the device we're adding
158 : : * @id: instance id
159 : : * @data: platform specific data for this platform device
160 : : * @size: size of platform specific data
161 : : *
162 : : * This function creates a simple platform device that requires minimal
163 : : * resource and memory management. Canned release function freeing memory
164 : : * allocated for the device allows drivers using such devices to be
165 : : * unloaded without waiting for the last reference to the device to be
166 : : * dropped.
167 : : *
168 : : * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
169 : : */
170 : : static inline struct platform_device *platform_device_register_data(
171 : : struct device *parent, const char *name, int id,
172 : : const void *data, size_t size)
173 : : {
174 : : return platform_device_register_resndata(parent, name, id,
175 : : NULL, 0, data, size);
176 : : }
177 : :
178 : : extern struct platform_device *platform_device_alloc(const char *name, int id);
179 : : extern int platform_device_add_resources(struct platform_device *pdev,
180 : : const struct resource *res,
181 : : unsigned int num);
182 : : extern int platform_device_add_data(struct platform_device *pdev,
183 : : const void *data, size_t size);
184 : : extern int platform_device_add_properties(struct platform_device *pdev,
185 : : const struct property_entry *properties);
186 : : extern int platform_device_add(struct platform_device *pdev);
187 : : extern void platform_device_del(struct platform_device *pdev);
188 : : extern void platform_device_put(struct platform_device *pdev);
189 : :
190 : : struct platform_driver {
191 : : int (*probe)(struct platform_device *);
192 : : int (*remove)(struct platform_device *);
193 : : void (*shutdown)(struct platform_device *);
194 : : int (*suspend)(struct platform_device *, pm_message_t state);
195 : : int (*resume)(struct platform_device *);
196 : : struct device_driver driver;
197 : : const struct platform_device_id *id_table;
198 : : bool prevent_deferred_probe;
199 : : };
200 : :
201 : : #define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
202 : : driver))
203 : :
204 : : /*
205 : : * use a macro to avoid include chaining to get THIS_MODULE
206 : : */
207 : : #define platform_driver_register(drv) \
208 : : __platform_driver_register(drv, THIS_MODULE)
209 : : extern int __platform_driver_register(struct platform_driver *,
210 : : struct module *);
211 : : extern void platform_driver_unregister(struct platform_driver *);
212 : :
213 : : /* non-hotpluggable platform devices may use this so that probe() and
214 : : * its support may live in __init sections, conserving runtime memory.
215 : : */
216 : : #define platform_driver_probe(drv, probe) \
217 : : __platform_driver_probe(drv, probe, THIS_MODULE)
218 : : extern int __platform_driver_probe(struct platform_driver *driver,
219 : : int (*probe)(struct platform_device *), struct module *module);
220 : :
221 : : static inline void *platform_get_drvdata(const struct platform_device *pdev)
222 : : {
223 : : return dev_get_drvdata(&pdev->dev);
224 : : }
225 : :
226 : : static inline void platform_set_drvdata(struct platform_device *pdev,
227 : : void *data)
228 : : {
229 : : dev_set_drvdata(&pdev->dev, data);
230 : : }
231 : :
232 : : /* module_platform_driver() - Helper macro for drivers that don't do
233 : : * anything special in module init/exit. This eliminates a lot of
234 : : * boilerplate. Each module may only use this macro once, and
235 : : * calling it replaces module_init() and module_exit()
236 : : */
237 : : #define module_platform_driver(__platform_driver) \
238 : : module_driver(__platform_driver, platform_driver_register, \
239 : : platform_driver_unregister)
240 : :
241 : : /* builtin_platform_driver() - Helper macro for builtin drivers that
242 : : * don't do anything special in driver init. This eliminates some
243 : : * boilerplate. Each driver may only use this macro once, and
244 : : * calling it replaces device_initcall(). Note this is meant to be
245 : : * a parallel of module_platform_driver() above, but w/o _exit stuff.
246 : : */
247 : : #define builtin_platform_driver(__platform_driver) \
248 : : builtin_driver(__platform_driver, platform_driver_register)
249 : :
250 : : /* module_platform_driver_probe() - Helper macro for drivers that don't do
251 : : * anything special in module init/exit. This eliminates a lot of
252 : : * boilerplate. Each module may only use this macro once, and
253 : : * calling it replaces module_init() and module_exit()
254 : : */
255 : : #define module_platform_driver_probe(__platform_driver, __platform_probe) \
256 : : static int __init __platform_driver##_init(void) \
257 : : { \
258 : : return platform_driver_probe(&(__platform_driver), \
259 : : __platform_probe); \
260 : : } \
261 : : module_init(__platform_driver##_init); \
262 : : static void __exit __platform_driver##_exit(void) \
263 : : { \
264 : : platform_driver_unregister(&(__platform_driver)); \
265 : : } \
266 : : module_exit(__platform_driver##_exit);
267 : :
268 : : /* builtin_platform_driver_probe() - Helper macro for drivers that don't do
269 : : * anything special in device init. This eliminates some boilerplate. Each
270 : : * driver may only use this macro once, and using it replaces device_initcall.
271 : : * This is meant to be a parallel of module_platform_driver_probe above, but
272 : : * without the __exit parts.
273 : : */
274 : : #define builtin_platform_driver_probe(__platform_driver, __platform_probe) \
275 : : static int __init __platform_driver##_init(void) \
276 : : { \
277 : : return platform_driver_probe(&(__platform_driver), \
278 : : __platform_probe); \
279 : : } \
280 : : device_initcall(__platform_driver##_init); \
281 : :
282 : : #define platform_create_bundle(driver, probe, res, n_res, data, size) \
283 : : __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE)
284 : : extern struct platform_device *__platform_create_bundle(
285 : : struct platform_driver *driver, int (*probe)(struct platform_device *),
286 : : struct resource *res, unsigned int n_res,
287 : : const void *data, size_t size, struct module *module);
288 : :
289 : : int __platform_register_drivers(struct platform_driver * const *drivers,
290 : : unsigned int count, struct module *owner);
291 : : void platform_unregister_drivers(struct platform_driver * const *drivers,
292 : : unsigned int count);
293 : :
294 : : #define platform_register_drivers(drivers, count) \
295 : : __platform_register_drivers(drivers, count, THIS_MODULE)
296 : :
297 : : /* early platform driver interface */
298 : : struct early_platform_driver {
299 : : const char *class_str;
300 : : struct platform_driver *pdrv;
301 : : struct list_head list;
302 : : int requested_id;
303 : : char *buffer;
304 : : int bufsize;
305 : : };
306 : :
307 : : #define EARLY_PLATFORM_ID_UNSET -2
308 : : #define EARLY_PLATFORM_ID_ERROR -3
309 : :
310 : : extern int early_platform_driver_register(struct early_platform_driver *epdrv,
311 : : char *buf);
312 : : extern void early_platform_add_devices(struct platform_device **devs, int num);
313 : :
314 : : static inline int is_early_platform_device(struct platform_device *pdev)
315 : : {
316 : : return !pdev->dev.driver;
317 : : }
318 : :
319 : : extern void early_platform_driver_register_all(char *class_str);
320 : : extern int early_platform_driver_probe(char *class_str,
321 : : int nr_probe, int user_only);
322 : : extern void early_platform_cleanup(void);
323 : :
324 : : #define early_platform_init(class_string, platdrv) \
325 : : early_platform_init_buffer(class_string, platdrv, NULL, 0)
326 : :
327 : : #ifndef MODULE
328 : : #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
329 : : static __initdata struct early_platform_driver early_driver = { \
330 : : .class_str = class_string, \
331 : : .buffer = buf, \
332 : : .bufsize = bufsiz, \
333 : : .pdrv = platdrv, \
334 : : .requested_id = EARLY_PLATFORM_ID_UNSET, \
335 : : }; \
336 : : static int __init early_platform_driver_setup_func(char *buffer) \
337 : : { \
338 : : return early_platform_driver_register(&early_driver, buffer); \
339 : : } \
340 : : early_param(class_string, early_platform_driver_setup_func)
341 : : #else /* MODULE */
342 : : #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \
343 : : static inline char *early_platform_driver_setup_func(void) \
344 : : { \
345 : : return bufsiz ? buf : NULL; \
346 : : }
347 : : #endif /* MODULE */
348 : :
349 : : #ifdef CONFIG_SUSPEND
350 : : extern int platform_pm_suspend(struct device *dev);
351 : : extern int platform_pm_resume(struct device *dev);
352 : : #else
353 : : #define platform_pm_suspend NULL
354 : : #define platform_pm_resume NULL
355 : : #endif
356 : :
357 : : #ifdef CONFIG_HIBERNATE_CALLBACKS
358 : : extern int platform_pm_freeze(struct device *dev);
359 : : extern int platform_pm_thaw(struct device *dev);
360 : : extern int platform_pm_poweroff(struct device *dev);
361 : : extern int platform_pm_restore(struct device *dev);
362 : : #else
363 : : #define platform_pm_freeze NULL
364 : : #define platform_pm_thaw NULL
365 : : #define platform_pm_poweroff NULL
366 : : #define platform_pm_restore NULL
367 : : #endif
368 : :
369 : : extern int platform_dma_configure(struct device *dev);
370 : :
371 : : #ifdef CONFIG_PM_SLEEP
372 : : #define USE_PLATFORM_PM_SLEEP_OPS \
373 : : .suspend = platform_pm_suspend, \
374 : : .resume = platform_pm_resume, \
375 : : .freeze = platform_pm_freeze, \
376 : : .thaw = platform_pm_thaw, \
377 : : .poweroff = platform_pm_poweroff, \
378 : : .restore = platform_pm_restore,
379 : : #else
380 : : #define USE_PLATFORM_PM_SLEEP_OPS
381 : : #endif
382 : :
383 : : #endif /* _PLATFORM_DEVICE_H_ */
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