1 /* 2 * platform_device.h - generic, centralized driver model 3 * 4 * Copyright (c) 2001-2003 Patrick Mochel <[email protected]> 5 * 6 * This file is released under the GPLv2 7 * 8 * See Documentation/driver-model/ for more information. 9 */ 10 11 #ifndef _PLATFORM_DEVICE_H_ 12 #define _PLATFORM_DEVICE_H_ 13 14 #include <linux/device.h> 15 #include <linux/mod_devicetable.h> 16 17 struct platform_device { 18 const char * name; 19 int id; 20 struct device dev; 21 u32 num_resources; 22 struct resource * resource; 23 24 const struct platform_device_id *id_entry; 25 26 /* arch specific additions */ 27 struct pdev_archdata archdata; 28 }; 29 30 #define platform_get_device_id(pdev) ((pdev)->id_entry) 31 32 #define to_platform_device(x) container_of((x), struct platform_device, dev) 33 34 extern int platform_device_register(struct platform_device *); 35 extern void platform_device_unregister(struct platform_device *); 36 37 extern struct bus_type platform_bus_type; 38 extern struct device platform_bus; 39 40 extern struct resource *platform_get_resource(struct platform_device *, unsigned int, unsigned int); 41 extern int platform_get_irq(struct platform_device *, unsigned int); 42 extern struct resource *platform_get_resource_byname(struct platform_device *, unsigned int, const char *); 43 extern int platform_get_irq_byname(struct platform_device *, const char *); 44 extern int platform_add_devices(struct platform_device **, int); 45 46 extern struct platform_device *platform_device_register_simple(const char *, int id, 47 const struct resource *, unsigned int); 48 extern struct platform_device *platform_device_register_data(struct device *, 49 const char *, int, const void *, size_t); 50 51 extern struct platform_device *platform_device_alloc(const char *name, int id); 52 extern int platform_device_add_resources(struct platform_device *pdev, 53 const struct resource *res, 54 unsigned int num); 55 extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size); 56 extern int platform_device_add(struct platform_device *pdev); 57 extern void platform_device_del(struct platform_device *pdev); 58 extern void platform_device_put(struct platform_device *pdev); 59 60 struct platform_driver { 61 int (*probe)(struct platform_device *); 62 int (*remove)(struct platform_device *); 63 void (*shutdown)(struct platform_device *); 64 int (*suspend)(struct platform_device *, pm_message_t state); 65 int (*resume)(struct platform_device *); 66 struct device_driver driver; 67 const struct platform_device_id *id_table; 68 }; 69 70 extern int platform_driver_register(struct platform_driver *); 71 extern void platform_driver_unregister(struct platform_driver *); 72 73 /* non-hotpluggable platform devices may use this so that probe() and 74 * its support may live in __init sections, conserving runtime memory. 75 */ 76 extern int platform_driver_probe(struct platform_driver *driver, 77 int (*probe)(struct platform_device *)); 78 79 #define platform_get_drvdata(_dev) dev_get_drvdata(&(_dev)->dev) 80 #define platform_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data)) 81 82 extern struct platform_device *platform_create_bundle(struct platform_driver *driver, 83 int (*probe)(struct platform_device *), 84 struct resource *res, unsigned int n_res, 85 const void *data, size_t size); 86 87 /* early platform driver interface */ 88 struct early_platform_driver { 89 const char *class_str; 90 struct platform_driver *pdrv; 91 struct list_head list; 92 int requested_id; 93 char *buffer; 94 int bufsize; 95 }; 96 97 #define EARLY_PLATFORM_ID_UNSET -2 98 #define EARLY_PLATFORM_ID_ERROR -3 99 100 extern int early_platform_driver_register(struct early_platform_driver *epdrv, 101 char *buf); 102 extern void early_platform_add_devices(struct platform_device **devs, int num); 103 104 static inline int is_early_platform_device(struct platform_device *pdev) 105 { 106 return !pdev->dev.driver; 107 } 108 109 extern void early_platform_driver_register_all(char *class_str); 110 extern int early_platform_driver_probe(char *class_str, 111 int nr_probe, int user_only); 112 extern void early_platform_cleanup(void); 113 114 #define early_platform_init(class_string, platdrv) \ 115 early_platform_init_buffer(class_string, platdrv, NULL, 0) 116 117 #ifndef MODULE 118 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \ 119 static __initdata struct early_platform_driver early_driver = { \ 120 .class_str = class_string, \ 121 .buffer = buf, \ 122 .bufsize = bufsiz, \ 123 .pdrv = platdrv, \ 124 .requested_id = EARLY_PLATFORM_ID_UNSET, \ 125 }; \ 126 static int __init early_platform_driver_setup_func(char *buffer) \ 127 { \ 128 return early_platform_driver_register(&early_driver, buffer); \ 129 } \ 130 early_param(class_string, early_platform_driver_setup_func) 131 #else /* MODULE */ 132 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \ 133 static inline char *early_platform_driver_setup_func(void) \ 134 { \ 135 return bufsiz ? buf : NULL; \ 136 } 137 #endif /* MODULE */ 138 139 #endif /* _PLATFORM_DEVICE_H_ */ 140