| Chen-Yu Tsai | d787dcd | 2015-10-23 20:41:31 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Allwinner Reduced Serial Bus Driver |
| 3 | * |
| 4 | * Copyright (c) 2015 Chen-Yu Tsai |
| 5 | * |
| 6 | * Author: Chen-Yu Tsai <wens@csie.org> |
| 7 | * |
| 8 | * This file is licensed under the terms of the GNU General Public |
| 9 | * License version 2. This program is licensed "as is" without any |
| 10 | * warranty of any kind, whether express or implied. |
| 11 | */ |
| 12 | #ifndef _SUNXI_RSB_H |
| 13 | #define _SUNXI_RSB_H |
| 14 | |
| 15 | #include <linux/device.h> |
| 16 | #include <linux/regmap.h> |
| 17 | #include <linux/types.h> |
| 18 | |
| 19 | struct sunxi_rsb; |
| 20 | |
| 21 | /** |
| 22 | * struct sunxi_rsb_device - Basic representation of an RSB device |
| 23 | * @dev: Driver model representation of the device. |
| 24 | * @ctrl: RSB controller managing the bus hosting this device. |
| 25 | * @rtaddr: This device's runtime address |
| 26 | * @hwaddr: This device's hardware address |
| 27 | */ |
| 28 | struct sunxi_rsb_device { |
| 29 | struct device dev; |
| 30 | struct sunxi_rsb *rsb; |
| 31 | int irq; |
| 32 | u8 rtaddr; |
| 33 | u16 hwaddr; |
| 34 | }; |
| 35 | |
| 36 | static inline struct sunxi_rsb_device *to_sunxi_rsb_device(struct device *d) |
| 37 | { |
| 38 | return container_of(d, struct sunxi_rsb_device, dev); |
| 39 | } |
| 40 | |
| 41 | static inline void *sunxi_rsb_device_get_drvdata(const struct sunxi_rsb_device *rdev) |
| 42 | { |
| 43 | return dev_get_drvdata(&rdev->dev); |
| 44 | } |
| 45 | |
| 46 | static inline void sunxi_rsb_device_set_drvdata(struct sunxi_rsb_device *rdev, |
| 47 | void *data) |
| 48 | { |
| 49 | dev_set_drvdata(&rdev->dev, data); |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * struct sunxi_rsb_driver - RSB slave device driver |
| 54 | * @driver: RSB device drivers should initialize name and owner field of |
| 55 | * this structure. |
| 56 | * @probe: binds this driver to a RSB device. |
| 57 | * @remove: unbinds this driver from the RSB device. |
| 58 | */ |
| 59 | struct sunxi_rsb_driver { |
| 60 | struct device_driver driver; |
| 61 | int (*probe)(struct sunxi_rsb_device *rdev); |
| 62 | int (*remove)(struct sunxi_rsb_device *rdev); |
| 63 | }; |
| 64 | |
| 65 | static inline struct sunxi_rsb_driver *to_sunxi_rsb_driver(struct device_driver *d) |
| 66 | { |
| 67 | return container_of(d, struct sunxi_rsb_driver, driver); |
| 68 | } |
| 69 | |
| 70 | int sunxi_rsb_driver_register(struct sunxi_rsb_driver *rdrv); |
| 71 | |
| 72 | /** |
| 73 | * sunxi_rsb_driver_unregister() - unregister an RSB client driver |
| 74 | * @rdrv: the driver to unregister |
| 75 | */ |
| 76 | static inline void sunxi_rsb_driver_unregister(struct sunxi_rsb_driver *rdrv) |
| 77 | { |
| 78 | if (rdrv) |
| 79 | driver_unregister(&rdrv->driver); |
| 80 | } |
| 81 | |
| 82 | #define module_sunxi_rsb_driver(__sunxi_rsb_driver) \ |
| 83 | module_driver(__sunxi_rsb_driver, sunxi_rsb_driver_register, \ |
| 84 | sunxi_rsb_driver_unregister) |
| 85 | |
| 86 | struct regmap *__devm_regmap_init_sunxi_rsb(struct sunxi_rsb_device *rdev, |
| 87 | const struct regmap_config *config, |
| 88 | struct lock_class_key *lock_key, |
| 89 | const char *lock_name); |
| 90 | |
| 91 | /** |
| 92 | * devm_regmap_init_sunxi_rsb(): Initialise managed register map |
| 93 | * |
| 94 | * @rdev: Device that will be interacted with |
| 95 | * @config: Configuration for register map |
| 96 | * |
| 97 | * The return value will be an ERR_PTR() on error or a valid pointer |
| 98 | * to a struct regmap. The regmap will be automatically freed by the |
| 99 | * device management code. |
| 100 | */ |
| 101 | #define devm_regmap_init_sunxi_rsb(rdev, config) \ |
| 102 | __regmap_lockdep_wrapper(__devm_regmap_init_sunxi_rsb, #config, \ |
| 103 | rdev, config) |
| 104 | |
| 105 | #endif /* _SUNXI_RSB_H */ |