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21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/i2c.h>
24#include <linux/videodev2.h>
25#include <linux/slab.h>
26#include <media/v4l2-device.h>
27#include <media/v4l2-ctrls.h>
28
29MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
30MODULE_AUTHOR("Hans Verkuil");
31MODULE_LICENSE("GPL");
32
33static bool debug;
34
35module_param(debug, bool, 0644);
36
37MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
38
39struct cs5345_state {
40 struct v4l2_subdev sd;
41 struct v4l2_ctrl_handler hdl;
42};
43
44static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)
45{
46 return container_of(sd, struct cs5345_state, sd);
47}
48
49static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
50{
51 return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;
52}
53
54
55
56static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
57{
58 struct i2c_client *client = v4l2_get_subdevdata(sd);
59
60 return i2c_smbus_write_byte_data(client, reg, value);
61}
62
63static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
64{
65 struct i2c_client *client = v4l2_get_subdevdata(sd);
66
67 return i2c_smbus_read_byte_data(client, reg);
68}
69
70static int cs5345_s_routing(struct v4l2_subdev *sd,
71 u32 input, u32 output, u32 config)
72{
73 if ((input & 0xf) > 6) {
74 v4l2_err(sd, "Invalid input %d.\n", input);
75 return -EINVAL;
76 }
77 cs5345_write(sd, 0x09, input & 0xf);
78 cs5345_write(sd, 0x05, input & 0xf0);
79 return 0;
80}
81
82static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl)
83{
84 struct v4l2_subdev *sd = to_sd(ctrl);
85
86 switch (ctrl->id) {
87 case V4L2_CID_AUDIO_MUTE:
88 cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0);
89 return 0;
90 case V4L2_CID_AUDIO_VOLUME:
91 cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f);
92 cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f);
93 return 0;
94 }
95 return -EINVAL;
96}
97
98#ifdef CONFIG_VIDEO_ADV_DEBUG
99static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
100{
101 reg->size = 1;
102 reg->val = cs5345_read(sd, reg->reg & 0x1f);
103 return 0;
104}
105
106static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
107{
108 cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
109 return 0;
110}
111#endif
112
113static int cs5345_log_status(struct v4l2_subdev *sd)
114{
115 u8 v = cs5345_read(sd, 0x09) & 7;
116 u8 m = cs5345_read(sd, 0x04);
117 int vol = cs5345_read(sd, 0x08) & 0x3f;
118
119 v4l2_info(sd, "Input: %d%s\n", v,
120 (m & 0x80) ? " (muted)" : "");
121 if (vol >= 32)
122 vol = vol - 64;
123 v4l2_info(sd, "Volume: %d dB\n", vol);
124 return 0;
125}
126
127
128
129static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {
130 .s_ctrl = cs5345_s_ctrl,
131};
132
133static const struct v4l2_subdev_core_ops cs5345_core_ops = {
134 .log_status = cs5345_log_status,
135 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
136 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
137 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
138 .g_ctrl = v4l2_subdev_g_ctrl,
139 .s_ctrl = v4l2_subdev_s_ctrl,
140 .queryctrl = v4l2_subdev_queryctrl,
141 .querymenu = v4l2_subdev_querymenu,
142#ifdef CONFIG_VIDEO_ADV_DEBUG
143 .g_register = cs5345_g_register,
144 .s_register = cs5345_s_register,
145#endif
146};
147
148static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
149 .s_routing = cs5345_s_routing,
150};
151
152static const struct v4l2_subdev_ops cs5345_ops = {
153 .core = &cs5345_core_ops,
154 .audio = &cs5345_audio_ops,
155};
156
157
158
159static int cs5345_probe(struct i2c_client *client,
160 const struct i2c_device_id *id)
161{
162 struct cs5345_state *state;
163 struct v4l2_subdev *sd;
164
165
166 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
167 return -EIO;
168
169 v4l_info(client, "chip found @ 0x%x (%s)\n",
170 client->addr << 1, client->adapter->name);
171
172 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
173 if (state == NULL)
174 return -ENOMEM;
175 sd = &state->sd;
176 v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
177
178 v4l2_ctrl_handler_init(&state->hdl, 2);
179 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
180 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
181 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
182 V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0);
183 sd->ctrl_handler = &state->hdl;
184 if (state->hdl.error) {
185 int err = state->hdl.error;
186
187 v4l2_ctrl_handler_free(&state->hdl);
188 return err;
189 }
190
191 v4l2_ctrl_handler_setup(&state->hdl);
192
193 cs5345_write(sd, 0x02, 0x00);
194 cs5345_write(sd, 0x04, 0x01);
195 cs5345_write(sd, 0x09, 0x01);
196 return 0;
197}
198
199
200
201static int cs5345_remove(struct i2c_client *client)
202{
203 struct v4l2_subdev *sd = i2c_get_clientdata(client);
204 struct cs5345_state *state = to_state(sd);
205
206 v4l2_device_unregister_subdev(sd);
207 v4l2_ctrl_handler_free(&state->hdl);
208 return 0;
209}
210
211
212
213static const struct i2c_device_id cs5345_id[] = {
214 { "cs5345", 0 },
215 { }
216};
217MODULE_DEVICE_TABLE(i2c, cs5345_id);
218
219static struct i2c_driver cs5345_driver = {
220 .driver = {
221 .owner = THIS_MODULE,
222 .name = "cs5345",
223 },
224 .probe = cs5345_probe,
225 .remove = cs5345_remove,
226 .id_table = cs5345_id,
227};
228
229module_i2c_driver(cs5345_driver);
230