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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
18struct irq_affinity;
19struct mfd_cell;
20struct property_entry;
21struct platform_device_id;
22
23struct platform_device {
24 const char *name;
25 int id;
26 bool id_auto;
27 struct device dev;
28 u64 platform_dma_mask;
29 struct device_dma_parameters dma_parms;
30 u32 num_resources;
31 struct resource *resource;
32
33 const struct platform_device_id *id_entry;
34 char *driver_override; /* Driver name to force a match */
35
36 /* MFD cell pointer */
37 struct mfd_cell *mfd_cell;
38
39 /* arch specific additions */
40 struct pdev_archdata archdata;
41};
42
43#define platform_get_device_id(pdev) ((pdev)->id_entry)
44
45#define dev_is_platform(dev) ((dev)->bus == &platform_bus_type)
46#define to_platform_device(x) container_of((x), struct platform_device, dev)
47
48extern int platform_device_register(struct platform_device *);
49extern void platform_device_unregister(struct platform_device *);
50
51extern struct bus_type platform_bus_type;
52extern struct device platform_bus;
53
54extern struct resource *platform_get_resource(struct platform_device *,
55 unsigned int, unsigned int);
56extern struct resource *platform_get_mem_or_io(struct platform_device *,
57 unsigned int);
58
59extern struct device *
60platform_find_device_by_driver(struct device *start,
61 const struct device_driver *drv);
62extern void __iomem *
63devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
64 unsigned int index, struct resource **res);
65extern void __iomem *
66devm_platform_ioremap_resource(struct platform_device *pdev,
67 unsigned int index);
68extern void __iomem *
69devm_platform_ioremap_resource_byname(struct platform_device *pdev,
70 const char *name);
71extern int platform_get_irq(struct platform_device *, unsigned int);
72extern int platform_get_irq_optional(struct platform_device *, unsigned int);
73extern int platform_irq_count(struct platform_device *);
74extern int devm_platform_get_irqs_affinity(struct platform_device *dev,
75 struct irq_affinity *affd,
76 unsigned int minvec,
77 unsigned int maxvec,
78 int **irqs);
79extern struct resource *platform_get_resource_byname(struct platform_device *,
80 unsigned int,
81 const char *);
82extern int platform_get_irq_byname(struct platform_device *, const char *);
83extern int platform_get_irq_byname_optional(struct platform_device *dev,
84 const char *name);
85extern int platform_add_devices(struct platform_device **, int);
86
87struct platform_device_info {
88 struct device *parent;
89 struct fwnode_handle *fwnode;
90 bool of_node_reused;
91
92 const char *name;
93 int id;
94
95 const struct resource *res;
96 unsigned int num_res;
97
98 const void *data;
99 size_t size_data;
100 u64 dma_mask;
101
102 const struct property_entry *properties;
103};
104extern struct platform_device *platform_device_register_full(
105 const struct platform_device_info *pdevinfo);
106
107/**
108 * platform_device_register_resndata - add a platform-level device with
109 * resources and platform-specific data
110 *
111 * @parent: parent device for the device we're adding
112 * @name: base name of the device we're adding
113 * @id: instance id
114 * @res: set of resources that needs to be allocated for the device
115 * @num: number of resources
116 * @data: platform specific data for this platform device
117 * @size: size of platform specific data
118 *
119 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
120 */
121static inline struct platform_device *platform_device_register_resndata(
122 struct device *parent, const char *name, int id,
123 const struct resource *res, unsigned int num,
124 const void *data, size_t size) {
125
126 struct platform_device_info pdevinfo = {
127 .parent = parent,
128 .name = name,
129 .id = id,
130 .res = res,
131 .num_res = num,
132 .data = data,
133 .size_data = size,
134 .dma_mask = 0,
135 };
136
137 return platform_device_register_full(&pdevinfo);
138}
139
140/**
141 * platform_device_register_simple - add a platform-level device and its resources
142 * @name: base name of the device we're adding
143 * @id: instance id
144 * @res: set of resources that needs to be allocated for the device
145 * @num: number of resources
146 *
147 * This function creates a simple platform device that requires minimal
148 * resource and memory management. Canned release function freeing memory
149 * allocated for the device allows drivers using such devices to be
150 * unloaded without waiting for the last reference to the device to be
151 * dropped.
152 *
153 * This interface is primarily intended for use with legacy drivers which
154 * probe hardware directly. Because such drivers create sysfs device nodes
155 * themselves, rather than letting system infrastructure handle such device
156 * enumeration tasks, they don't fully conform to the Linux driver model.
157 * In particular, when such drivers are built as modules, they can't be
158 * "hotplugged".
159 *
160 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
161 */
162static inline struct platform_device *platform_device_register_simple(
163 const char *name, int id,
164 const struct resource *res, unsigned int num)
165{
166 return platform_device_register_resndata(NULL, name, id,
167 res, num, NULL, 0);
168}
169
170/**
171 * platform_device_register_data - add a platform-level device with platform-specific data
172 * @parent: parent device for the device we're adding
173 * @name: base name of the device we're adding
174 * @id: instance id
175 * @data: platform specific data for this platform device
176 * @size: size of platform specific data
177 *
178 * This function creates a simple platform device that requires minimal
179 * resource and memory management. Canned release function freeing memory
180 * allocated for the device allows drivers using such devices to be
181 * unloaded without waiting for the last reference to the device to be
182 * dropped.
183 *
184 * Returns &struct platform_device pointer on success, or ERR_PTR() on error.
185 */
186static inline struct platform_device *platform_device_register_data(
187 struct device *parent, const char *name, int id,
188 const void *data, size_t size)
189{
190 return platform_device_register_resndata(parent, name, id,
191 NULL, 0, data, size);
192}
193
194extern struct platform_device *platform_device_alloc(const char *name, int id);
195extern int platform_device_add_resources(struct platform_device *pdev,
196 const struct resource *res,
197 unsigned int num);
198extern int platform_device_add_data(struct platform_device *pdev,
199 const void *data, size_t size);
200extern int platform_device_add(struct platform_device *pdev);
201extern void platform_device_del(struct platform_device *pdev);
202extern void platform_device_put(struct platform_device *pdev);
203
204struct platform_driver {
205 int (*probe)(struct platform_device *);
206 int (*remove)(struct platform_device *);
207 void (*shutdown)(struct platform_device *);
208 int (*suspend)(struct platform_device *, pm_message_t state);
209 int (*resume)(struct platform_device *);
210 struct device_driver driver;
211 const struct platform_device_id *id_table;
212 bool prevent_deferred_probe;
213};
214
215#define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
216 driver))
217
218/*
219 * use a macro to avoid include chaining to get THIS_MODULE
220 */
221#define platform_driver_register(drv) \
222 __platform_driver_register(drv, THIS_MODULE)
223extern int __platform_driver_register(struct platform_driver *,
224 struct module *);
225extern void platform_driver_unregister(struct platform_driver *);
226
227/* non-hotpluggable platform devices may use this so that probe() and
228 * its support may live in __init sections, conserving runtime memory.
229 */
230#define platform_driver_probe(drv, probe) \
231 __platform_driver_probe(drv, probe, THIS_MODULE)
232extern int __platform_driver_probe(struct platform_driver *driver,
233 int (*probe)(struct platform_device *), struct module *module);
234
235static inline void *platform_get_drvdata(const struct platform_device *pdev)
236{
237 return dev_get_drvdata(&pdev->dev);
238}
239
240static inline void platform_set_drvdata(struct platform_device *pdev,
241 void *data)
242{
243 dev_set_drvdata(&pdev->dev, data);
244}
245
246/* module_platform_driver() - Helper macro for drivers that don't do
247 * anything special in module init/exit. This eliminates a lot of
248 * boilerplate. Each module may only use this macro once, and
249 * calling it replaces module_init() and module_exit()
250 */
251#define module_platform_driver(__platform_driver) \
252 module_driver(__platform_driver, platform_driver_register, \
253 platform_driver_unregister)
254
255/* builtin_platform_driver() - Helper macro for builtin drivers that
256 * don't do anything special in driver init. This eliminates some
257 * boilerplate. Each driver may only use this macro once, and
258 * calling it replaces device_initcall(). Note this is meant to be
259 * a parallel of module_platform_driver() above, but w/o _exit stuff.
260 */
261#define builtin_platform_driver(__platform_driver) \
262 builtin_driver(__platform_driver, platform_driver_register)
263
264/* module_platform_driver_probe() - Helper macro for drivers that don't do
265 * anything special in module init/exit. This eliminates a lot of
266 * boilerplate. Each module may only use this macro once, and
267 * calling it replaces module_init() and module_exit()
268 */
269#define module_platform_driver_probe(__platform_driver, __platform_probe) \
270static int __init __platform_driver##_init(void) \
271{ \
272 return platform_driver_probe(&(__platform_driver), \
273 __platform_probe); \
274} \
275module_init(__platform_driver##_init); \
276static void __exit __platform_driver##_exit(void) \
277{ \
278 platform_driver_unregister(&(__platform_driver)); \
279} \
280module_exit(__platform_driver##_exit);
281
282/* builtin_platform_driver_probe() - Helper macro for drivers that don't do
283 * anything special in device init. This eliminates some boilerplate. Each
284 * driver may only use this macro once, and using it replaces device_initcall.
285 * This is meant to be a parallel of module_platform_driver_probe above, but
286 * without the __exit parts.
287 */
288#define builtin_platform_driver_probe(__platform_driver, __platform_probe) \
289static int __init __platform_driver##_init(void) \
290{ \
291 return platform_driver_probe(&(__platform_driver), \
292 __platform_probe); \
293} \
294device_initcall(__platform_driver##_init); \
295
296#define platform_create_bundle(driver, probe, res, n_res, data, size) \
297 __platform_create_bundle(driver, probe, res, n_res, data, size, THIS_MODULE)
298extern struct platform_device *__platform_create_bundle(
299 struct platform_driver *driver, int (*probe)(struct platform_device *),
300 struct resource *res, unsigned int n_res,
301 const void *data, size_t size, struct module *module);
302
303int __platform_register_drivers(struct platform_driver * const *drivers,
304 unsigned int count, struct module *owner);
305void platform_unregister_drivers(struct platform_driver * const *drivers,
306 unsigned int count);
307
308#define platform_register_drivers(drivers, count) \
309 __platform_register_drivers(drivers, count, THIS_MODULE)
310
311#ifdef CONFIG_SUSPEND
312extern int platform_pm_suspend(struct device *dev);
313extern int platform_pm_resume(struct device *dev);
314#else
315#define platform_pm_suspend NULL
316#define platform_pm_resume NULL
317#endif
318
319#ifdef CONFIG_HIBERNATE_CALLBACKS
320extern int platform_pm_freeze(struct device *dev);
321extern int platform_pm_thaw(struct device *dev);
322extern int platform_pm_poweroff(struct device *dev);
323extern int platform_pm_restore(struct device *dev);
324#else
325#define platform_pm_freeze NULL
326#define platform_pm_thaw NULL
327#define platform_pm_poweroff NULL
328#define platform_pm_restore NULL
329#endif
330
331extern int platform_dma_configure(struct device *dev);
332
333#ifdef CONFIG_PM_SLEEP
334#define USE_PLATFORM_PM_SLEEP_OPS \
335 .suspend = platform_pm_suspend, \
336 .resume = platform_pm_resume, \
337 .freeze = platform_pm_freeze, \
338 .thaw = platform_pm_thaw, \
339 .poweroff = platform_pm_poweroff, \
340 .restore = platform_pm_restore,
341#else
342#define USE_PLATFORM_PM_SLEEP_OPS
343#endif
344
345#ifndef CONFIG_SUPERH
346/*
347 * REVISIT: This stub is needed for all non-SuperH users of early platform
348 * drivers. It should go away once we introduce the new platform_device-based
349 * early driver framework.
350 */
351static inline int is_sh_early_platform_device(struct platform_device *pdev)
352{
353 return 0;
354}
355#endif /* CONFIG_SUPERH */
356
357/* For now only SuperH uses it */
358void early_platform_cleanup(void);
359
360#endif /* _PLATFORM_DEVICE_H_ */