1 /* SPDX-License-Identifier: GPL-2.0
2 *
3 * Copyright (C) 2016 Robert Jarzmik <robert.jarzmik@free.fr>
4 */
5
6 #ifndef __SOUND_AC97_CODEC2_H
7 #define __SOUND_AC97_CODEC2_H
8
9 #include <linux/device.h>
10
11 #define AC97_ID(vendor_id1, vendor_id2) \
12 ((((vendor_id1) & 0xffff) << 16) | ((vendor_id2) & 0xffff))
13 #define AC97_DRIVER_ID(vendor_id1, vendor_id2, mask_id1, mask_id2, _data) \
14 { .id = (((vendor_id1) & 0xffff) << 16) | ((vendor_id2) & 0xffff), \
15 .mask = (((mask_id1) & 0xffff) << 16) | ((mask_id2) & 0xffff), \
16 .data = (_data) }
17
18 struct ac97_controller;
19 struct clk;
20
21 /**
22 * struct ac97_id - matches a codec device and driver on an ac97 bus
23 * @id: The significant bits if the codec vendor ID1 and ID2
24 * @mask: Bitmask specifying which bits of the id field are significant when
25 * matching. A driver binds to a device when :
26 * ((vendorID1 << 8 | vendorID2) & (mask_id1 << 8 | mask_id2)) == id.
27 * @data: Private data used by the driver.
28 */
29 struct ac97_id {
30 unsigned int id;
31 unsigned int mask;
32 void *data;
33 };
34
35 /**
36 * ac97_codec_device - a ac97 codec
37 * @dev: the core device
38 * @vendor_id: the vendor_id of the codec, as sensed on the AC-link
39 * @num: the codec number, 0 is primary, 1 is first slave, etc ...
40 * @clk: the clock BIT_CLK provided by the codec
41 * @ac97_ctrl: ac97 digital controller on the same AC-link
42 *
43 * This is the device instantiated for each codec living on a AC-link. There are
44 * normally 0 to 4 codec devices per AC-link, and all of them are controlled by
45 * an AC97 digital controller.
46 */
47 struct ac97_codec_device {
48 struct device dev;
49 unsigned int vendor_id;
50 unsigned int num;
51 struct clk *clk;
52 struct ac97_controller *ac97_ctrl;
53 };
54
55 /**
56 * ac97_codec_driver - a ac97 codec driver
57 * @driver: the device driver structure
58 * @probe: the function called when a ac97_codec_device is matched
59 * @remove: the function called when the device is unbound/removed
60 * @shutdown: shutdown function (might be NULL)
61 * @id_table: ac97 vendor_id match table, { } member terminated
62 */
63 struct ac97_codec_driver {
64 struct device_driver driver;
65 int (*probe)(struct ac97_codec_device *);
66 int (*remove)(struct ac97_codec_device *);
67 void (*shutdown)(struct ac97_codec_device *);
68 const struct ac97_id *id_table;
69 };
70
to_ac97_device(struct device * d)71 static inline struct ac97_codec_device *to_ac97_device(struct device *d)
72 {
73 return container_of(d, struct ac97_codec_device, dev);
74 }
75
to_ac97_driver(struct device_driver * d)76 static inline struct ac97_codec_driver *to_ac97_driver(struct device_driver *d)
77 {
78 return container_of(d, struct ac97_codec_driver, driver);
79 }
80
81 #if IS_ENABLED(CONFIG_AC97_BUS_NEW)
82 int snd_ac97_codec_driver_register(struct ac97_codec_driver *drv);
83 void snd_ac97_codec_driver_unregister(struct ac97_codec_driver *drv);
84 #else
85 static inline int
snd_ac97_codec_driver_register(struct ac97_codec_driver * drv)86 snd_ac97_codec_driver_register(struct ac97_codec_driver *drv)
87 {
88 return 0;
89 }
90 static inline void
snd_ac97_codec_driver_unregister(struct ac97_codec_driver * drv)91 snd_ac97_codec_driver_unregister(struct ac97_codec_driver *drv)
92 {
93 }
94 #endif
95
96
97 static inline struct device *
ac97_codec_dev2dev(struct ac97_codec_device * adev)98 ac97_codec_dev2dev(struct ac97_codec_device *adev)
99 {
100 return &adev->dev;
101 }
102
ac97_get_drvdata(struct ac97_codec_device * adev)103 static inline void *ac97_get_drvdata(struct ac97_codec_device *adev)
104 {
105 return dev_get_drvdata(ac97_codec_dev2dev(adev));
106 }
107
ac97_set_drvdata(struct ac97_codec_device * adev,void * data)108 static inline void ac97_set_drvdata(struct ac97_codec_device *adev,
109 void *data)
110 {
111 dev_set_drvdata(ac97_codec_dev2dev(adev), data);
112 }
113
114 void *snd_ac97_codec_get_platdata(const struct ac97_codec_device *adev);
115
116 #endif
117