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
16MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
17MODULE_AUTHOR("Hans Verkuil");
18MODULE_LICENSE("GPL");
19
20static bool debug;
21
22module_param(debug, bool, 0644);
23
24MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
25
26struct cs5345_state {
27 struct v4l2_subdev sd;
28 struct v4l2_ctrl_handler hdl;
29};
30
31static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)
32{
33 return container_of(sd, struct cs5345_state, sd);
34}
35
36static 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
43static 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
50static 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
57static 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
69static 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
86static 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
93static 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
100static 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
116static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {
117 .s_ctrl = cs5345_s_ctrl,
118};
119
120static 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
128static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
129 .s_routing = cs5345_s_routing,
130};
131
132static const struct v4l2_subdev_ops cs5345_ops = {
133 .core = &cs5345_core_ops,
134 .audio = &cs5345_audio_ops,
135};
136
137/* ----------------------------------------------------------------------- */
138
139static 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
180static 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
191static const struct i2c_device_id cs5345_id[] = {
192 { "cs5345", 0 },
193 { }
194};
195MODULE_DEVICE_TABLE(i2c, cs5345_id);
196
197static 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
206module_i2c_driver(cs5345_driver);
207

source code of linux/drivers/media/i2c/cs5345.c