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 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 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, struct resource *res, unsigned int num); 53 extern int platform_device_add_data(struct platform_device *pdev, const void *data, size_t size); 54 extern int platform_device_add(struct platform_device *pdev); 55 extern void platform_device_del(struct platform_device *pdev); 56 extern void platform_device_put(struct platform_device *pdev); 57 58 struct platform_driver { 59 int (*probe)(struct platform_device *); 60 int (*remove)(struct platform_device *); 61 void (*shutdown)(struct platform_device *); 62 int (*suspend)(struct platform_device *, pm_message_t state); 63 int (*resume)(struct platform_device *); 64 struct device_driver driver; 65 struct platform_device_id *id_table; 66 }; 67 68 extern int platform_driver_register(struct platform_driver *); 69 extern void platform_driver_unregister(struct platform_driver *); 70 71 /* non-hotpluggable platform devices may use this so that probe() and 72 * its support may live in __init sections, conserving runtime memory. 73 */ 74 extern int platform_driver_probe(struct platform_driver *driver, 75 int (*probe)(struct platform_device *)); 76 77 #define platform_get_drvdata(_dev) dev_get_drvdata(&(_dev)->dev) 78 #define platform_set_drvdata(_dev,data) dev_set_drvdata(&(_dev)->dev, (data)) 79 80 /* early platform driver interface */ 81 struct early_platform_driver { 82 const char *class_str; 83 struct platform_driver *pdrv; 84 struct list_head list; 85 int requested_id; 86 char *buffer; 87 int bufsize; 88 }; 89 90 #define EARLY_PLATFORM_ID_UNSET -2 91 #define EARLY_PLATFORM_ID_ERROR -3 92 93 extern int early_platform_driver_register(struct early_platform_driver *epdrv, 94 char *buf); 95 extern void early_platform_add_devices(struct platform_device **devs, int num); 96 97 static inline int is_early_platform_device(struct platform_device *pdev) 98 { 99 return !pdev->dev.driver; 100 } 101 102 extern void early_platform_driver_register_all(char *class_str); 103 extern int early_platform_driver_probe(char *class_str, 104 int nr_probe, int user_only); 105 extern void early_platform_cleanup(void); 106 107 #define early_platform_init(class_string, platdrv) \ 108 early_platform_init_buffer(class_string, platdrv, NULL, 0) 109 110 #ifndef MODULE 111 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \ 112 static __initdata struct early_platform_driver early_driver = { \ 113 .class_str = class_string, \ 114 .buffer = buf, \ 115 .bufsize = bufsiz, \ 116 .pdrv = platdrv, \ 117 .requested_id = EARLY_PLATFORM_ID_UNSET, \ 118 }; \ 119 static int __init early_platform_driver_setup_func(char *buffer) \ 120 { \ 121 return early_platform_driver_register(&early_driver, buffer); \ 122 } \ 123 early_param(class_string, early_platform_driver_setup_func) 124 #else /* MODULE */ 125 #define early_platform_init_buffer(class_string, platdrv, buf, bufsiz) \ 126 static inline char *early_platform_driver_setup_func(void) \ 127 { \ 128 return bufsiz ? buf : NULL; \ 129 } 130 #endif /* MODULE */ 131 132 #endif /* _PLATFORM_DEVICE_H_ */ 133