1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC |
4 | * Copyright (C) 2007 Hans Verkuil |
5 | */ |
6 | |
7 | |
8 | #include <linux/module.h> |
9 | #include <linux/kernel.h> |
10 | #include <linux/i2c.h> |
11 | #include <linux/videodev2.h> |
12 | #include <linux/slab.h> |
13 | #include <media/v4l2-device.h> |
14 | #include <media/v4l2-ctrls.h> |
15 | |
16 | MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC" ); |
17 | MODULE_AUTHOR("Hans Verkuil" ); |
18 | MODULE_LICENSE("GPL" ); |
19 | |
20 | static bool debug; |
21 | |
22 | module_param(debug, bool, 0644); |
23 | |
24 | MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On" ); |
25 | |
26 | struct cs5345_state { |
27 | struct v4l2_subdev sd; |
28 | struct v4l2_ctrl_handler hdl; |
29 | }; |
30 | |
31 | static inline struct cs5345_state *to_state(struct v4l2_subdev *sd) |
32 | { |
33 | return container_of(sd, struct cs5345_state, sd); |
34 | } |
35 | |
36 | static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) |
37 | { |
38 | return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd; |
39 | } |
40 | |
41 | /* ----------------------------------------------------------------------- */ |
42 | |
43 | static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value) |
44 | { |
45 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
46 | |
47 | return i2c_smbus_write_byte_data(client, command: reg, value); |
48 | } |
49 | |
50 | static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg) |
51 | { |
52 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
53 | |
54 | return i2c_smbus_read_byte_data(client, command: reg); |
55 | } |
56 | |
57 | static int cs5345_s_routing(struct v4l2_subdev *sd, |
58 | u32 input, u32 output, u32 config) |
59 | { |
60 | if ((input & 0xf) > 6) { |
61 | v4l2_err(sd, "Invalid input %d.\n" , input); |
62 | return -EINVAL; |
63 | } |
64 | cs5345_write(sd, reg: 0x09, value: input & 0xf); |
65 | cs5345_write(sd, reg: 0x05, value: input & 0xf0); |
66 | return 0; |
67 | } |
68 | |
69 | static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl) |
70 | { |
71 | struct v4l2_subdev *sd = to_sd(ctrl); |
72 | |
73 | switch (ctrl->id) { |
74 | case V4L2_CID_AUDIO_MUTE: |
75 | cs5345_write(sd, reg: 0x04, value: ctrl->val ? 0x80 : 0); |
76 | return 0; |
77 | case V4L2_CID_AUDIO_VOLUME: |
78 | cs5345_write(sd, reg: 0x07, value: ((u8)ctrl->val) & 0x3f); |
79 | cs5345_write(sd, reg: 0x08, value: ((u8)ctrl->val) & 0x3f); |
80 | return 0; |
81 | } |
82 | return -EINVAL; |
83 | } |
84 | |
85 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
86 | static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
87 | { |
88 | reg->size = 1; |
89 | reg->val = cs5345_read(sd, reg: reg->reg & 0x1f); |
90 | return 0; |
91 | } |
92 | |
93 | static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) |
94 | { |
95 | cs5345_write(sd, reg: reg->reg & 0x1f, value: reg->val & 0xff); |
96 | return 0; |
97 | } |
98 | #endif |
99 | |
100 | static int cs5345_log_status(struct v4l2_subdev *sd) |
101 | { |
102 | u8 v = cs5345_read(sd, reg: 0x09) & 7; |
103 | u8 m = cs5345_read(sd, reg: 0x04); |
104 | int vol = cs5345_read(sd, reg: 0x08) & 0x3f; |
105 | |
106 | v4l2_info(sd, "Input: %d%s\n" , v, |
107 | (m & 0x80) ? " (muted)" : "" ); |
108 | if (vol >= 32) |
109 | vol = vol - 64; |
110 | v4l2_info(sd, "Volume: %d dB\n" , vol); |
111 | return 0; |
112 | } |
113 | |
114 | /* ----------------------------------------------------------------------- */ |
115 | |
116 | static const struct v4l2_ctrl_ops cs5345_ctrl_ops = { |
117 | .s_ctrl = cs5345_s_ctrl, |
118 | }; |
119 | |
120 | static const struct v4l2_subdev_core_ops cs5345_core_ops = { |
121 | .log_status = cs5345_log_status, |
122 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
123 | .g_register = cs5345_g_register, |
124 | .s_register = cs5345_s_register, |
125 | #endif |
126 | }; |
127 | |
128 | static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { |
129 | .s_routing = cs5345_s_routing, |
130 | }; |
131 | |
132 | static const struct v4l2_subdev_ops cs5345_ops = { |
133 | .core = &cs5345_core_ops, |
134 | .audio = &cs5345_audio_ops, |
135 | }; |
136 | |
137 | /* ----------------------------------------------------------------------- */ |
138 | |
139 | static int cs5345_probe(struct i2c_client *client) |
140 | { |
141 | struct cs5345_state *state; |
142 | struct v4l2_subdev *sd; |
143 | |
144 | /* Check if the adapter supports the needed features */ |
145 | if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
146 | return -EIO; |
147 | |
148 | v4l_info(client, "chip found @ 0x%x (%s)\n" , |
149 | client->addr << 1, client->adapter->name); |
150 | |
151 | state = devm_kzalloc(dev: &client->dev, size: sizeof(*state), GFP_KERNEL); |
152 | if (state == NULL) |
153 | return -ENOMEM; |
154 | sd = &state->sd; |
155 | v4l2_i2c_subdev_init(sd, client, ops: &cs5345_ops); |
156 | |
157 | v4l2_ctrl_handler_init(&state->hdl, 2); |
158 | v4l2_ctrl_new_std(hdl: &state->hdl, ops: &cs5345_ctrl_ops, |
159 | V4L2_CID_AUDIO_MUTE, min: 0, max: 1, step: 1, def: 0); |
160 | v4l2_ctrl_new_std(hdl: &state->hdl, ops: &cs5345_ctrl_ops, |
161 | V4L2_CID_AUDIO_VOLUME, min: -24, max: 24, step: 1, def: 0); |
162 | sd->ctrl_handler = &state->hdl; |
163 | if (state->hdl.error) { |
164 | int err = state->hdl.error; |
165 | |
166 | v4l2_ctrl_handler_free(hdl: &state->hdl); |
167 | return err; |
168 | } |
169 | /* set volume/mute */ |
170 | v4l2_ctrl_handler_setup(hdl: &state->hdl); |
171 | |
172 | cs5345_write(sd, reg: 0x02, value: 0x00); |
173 | cs5345_write(sd, reg: 0x04, value: 0x01); |
174 | cs5345_write(sd, reg: 0x09, value: 0x01); |
175 | return 0; |
176 | } |
177 | |
178 | /* ----------------------------------------------------------------------- */ |
179 | |
180 | static void cs5345_remove(struct i2c_client *client) |
181 | { |
182 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
183 | struct cs5345_state *state = to_state(sd); |
184 | |
185 | v4l2_device_unregister_subdev(sd); |
186 | v4l2_ctrl_handler_free(hdl: &state->hdl); |
187 | } |
188 | |
189 | /* ----------------------------------------------------------------------- */ |
190 | |
191 | static const struct i2c_device_id cs5345_id[] = { |
192 | { "cs5345" , 0 }, |
193 | { } |
194 | }; |
195 | MODULE_DEVICE_TABLE(i2c, cs5345_id); |
196 | |
197 | static struct i2c_driver cs5345_driver = { |
198 | .driver = { |
199 | .name = "cs5345" , |
200 | }, |
201 | .probe = cs5345_probe, |
202 | .remove = cs5345_remove, |
203 | .id_table = cs5345_id, |
204 | }; |
205 | |
206 | module_i2c_driver(cs5345_driver); |
207 | |