1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * hdac-ext-bus.c - HD-audio extended core bus functions. |
4 | * |
5 | * Copyright (C) 2014-2015 Intel Corp |
6 | * Author: Jeeja KP <jeeja.kp@intel.com> |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
8 | * |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
10 | */ |
11 | |
12 | #include <linux/module.h> |
13 | #include <linux/slab.h> |
14 | #include <linux/io.h> |
15 | #include <sound/hdaudio_ext.h> |
16 | |
17 | MODULE_DESCRIPTION("HDA extended core" ); |
18 | MODULE_LICENSE("GPL v2" ); |
19 | |
20 | /** |
21 | * snd_hdac_ext_bus_init - initialize a HD-audio extended bus |
22 | * @bus: the pointer to HDAC bus object |
23 | * @dev: device pointer |
24 | * @ops: bus verb operators |
25 | * @ext_ops: operators used for ASoC HDA codec drivers |
26 | * |
27 | * Returns 0 if successful, or a negative error code. |
28 | */ |
29 | int snd_hdac_ext_bus_init(struct hdac_bus *bus, struct device *dev, |
30 | const struct hdac_bus_ops *ops, |
31 | const struct hdac_ext_bus_ops *ext_ops) |
32 | { |
33 | int ret; |
34 | |
35 | ret = snd_hdac_bus_init(bus, dev, ops); |
36 | if (ret < 0) |
37 | return ret; |
38 | |
39 | bus->ext_ops = ext_ops; |
40 | /* FIXME: |
41 | * Currently only one bus is supported, if there is device with more |
42 | * buses, bus->idx should be greater than 0, but there needs to be a |
43 | * reliable way to always assign same number. |
44 | */ |
45 | bus->idx = 0; |
46 | bus->cmd_dma_state = true; |
47 | |
48 | return 0; |
49 | } |
50 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_init); |
51 | |
52 | /** |
53 | * snd_hdac_ext_bus_exit - clean up a HD-audio extended bus |
54 | * @bus: the pointer to HDAC bus object |
55 | */ |
56 | void snd_hdac_ext_bus_exit(struct hdac_bus *bus) |
57 | { |
58 | snd_hdac_bus_exit(bus); |
59 | WARN_ON(!list_empty(&bus->hlink_list)); |
60 | } |
61 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_exit); |
62 | |
63 | /** |
64 | * snd_hdac_ext_bus_device_remove - remove HD-audio extended codec base devices |
65 | * |
66 | * @bus: the pointer to HDAC bus object |
67 | */ |
68 | void snd_hdac_ext_bus_device_remove(struct hdac_bus *bus) |
69 | { |
70 | struct hdac_device *codec, *__codec; |
71 | /* |
72 | * we need to remove all the codec devices objects created in the |
73 | * snd_hdac_ext_bus_device_init |
74 | */ |
75 | list_for_each_entry_safe(codec, __codec, &bus->codec_list, list) { |
76 | snd_hdac_device_unregister(codec); |
77 | put_device(dev: &codec->dev); |
78 | } |
79 | } |
80 | EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_device_remove); |
81 | #define dev_to_hdac(dev) (container_of((dev), \ |
82 | struct hdac_device, dev)) |
83 | |
84 | static inline struct hdac_driver *get_hdrv(struct device *dev) |
85 | { |
86 | struct hdac_driver *hdrv = drv_to_hdac_driver(dev->driver); |
87 | return hdrv; |
88 | } |
89 | |
90 | static inline struct hdac_device *get_hdev(struct device *dev) |
91 | { |
92 | struct hdac_device *hdev = dev_to_hdac_dev(dev); |
93 | return hdev; |
94 | } |
95 | |
96 | static int hda_ext_drv_probe(struct device *dev) |
97 | { |
98 | return (get_hdrv(dev))->probe(get_hdev(dev)); |
99 | } |
100 | |
101 | static int hdac_ext_drv_remove(struct device *dev) |
102 | { |
103 | return (get_hdrv(dev))->remove(get_hdev(dev)); |
104 | } |
105 | |
106 | static void hdac_ext_drv_shutdown(struct device *dev) |
107 | { |
108 | return (get_hdrv(dev))->shutdown(get_hdev(dev)); |
109 | } |
110 | |
111 | /** |
112 | * snd_hda_ext_driver_register - register a driver for ext hda devices |
113 | * |
114 | * @drv: ext hda driver structure |
115 | */ |
116 | int snd_hda_ext_driver_register(struct hdac_driver *drv) |
117 | { |
118 | drv->type = HDA_DEV_ASOC; |
119 | drv->driver.bus = &snd_hda_bus_type; |
120 | /* we use default match */ |
121 | |
122 | if (drv->probe) |
123 | drv->driver.probe = hda_ext_drv_probe; |
124 | if (drv->remove) |
125 | drv->driver.remove = hdac_ext_drv_remove; |
126 | if (drv->shutdown) |
127 | drv->driver.shutdown = hdac_ext_drv_shutdown; |
128 | |
129 | return driver_register(drv: &drv->driver); |
130 | } |
131 | EXPORT_SYMBOL_GPL(snd_hda_ext_driver_register); |
132 | |
133 | /** |
134 | * snd_hda_ext_driver_unregister - unregister a driver for ext hda devices |
135 | * |
136 | * @drv: ext hda driver structure |
137 | */ |
138 | void snd_hda_ext_driver_unregister(struct hdac_driver *drv) |
139 | { |
140 | driver_unregister(drv: &drv->driver); |
141 | } |
142 | EXPORT_SYMBOL_GPL(snd_hda_ext_driver_unregister); |
143 | |