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22#include <linux/module.h>
23#include <linux/types.h>
24#include <linux/slab.h>
25#include <linux/ioctl.h>
26#include <linux/uaccess.h>
27#include <linux/i2c.h>
28#include <linux/videodev2.h>
29#include <media/v4l2-device.h>
30#include <media/v4l2-ctrls.h>
31
32MODULE_DESCRIPTION("tlv320aic23b driver");
33MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
34MODULE_LICENSE("GPL");
35
36
37
38
39struct tlv320aic23b_state {
40 struct v4l2_subdev sd;
41 struct v4l2_ctrl_handler hdl;
42};
43
44static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd)
45{
46 return container_of(sd, struct tlv320aic23b_state, sd);
47}
48
49static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
50{
51 return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd;
52}
53
54static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val)
55{
56 struct i2c_client *client = v4l2_get_subdevdata(sd);
57 int i;
58
59 if ((reg < 0 || reg > 9) && (reg != 15)) {
60 v4l2_err(sd, "Invalid register R%d\n", reg);
61 return -1;
62 }
63
64 for (i = 0; i < 3; i++)
65 if (i2c_smbus_write_byte_data(client,
66 (reg << 1) | (val >> 8), val & 0xff) == 0)
67 return 0;
68 v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
69 return -1;
70}
71
72static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
73{
74 switch (freq) {
75 case 32000:
76 tlv320aic23b_write(sd, 8, 0x018);
77 break;
78 case 44100:
79 tlv320aic23b_write(sd, 8, 0x022);
80 break;
81 case 48000:
82 tlv320aic23b_write(sd, 8, 0x000);
83 break;
84 default:
85 return -EINVAL;
86 }
87 return 0;
88}
89
90static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl)
91{
92 struct v4l2_subdev *sd = to_sd(ctrl);
93
94 switch (ctrl->id) {
95 case V4L2_CID_AUDIO_MUTE:
96 tlv320aic23b_write(sd, 0, 0x180);
97
98 if (!ctrl->val)
99 tlv320aic23b_write(sd, 0, 0x119);
100 return 0;
101 }
102 return -EINVAL;
103}
104
105static int tlv320aic23b_log_status(struct v4l2_subdev *sd)
106{
107 struct tlv320aic23b_state *state = to_state(sd);
108
109 v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
110 return 0;
111}
112
113
114
115static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = {
116 .s_ctrl = tlv320aic23b_s_ctrl,
117};
118
119static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = {
120 .log_status = tlv320aic23b_log_status,
121};
122
123static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = {
124 .s_clock_freq = tlv320aic23b_s_clock_freq,
125};
126
127static const struct v4l2_subdev_ops tlv320aic23b_ops = {
128 .core = &tlv320aic23b_core_ops,
129 .audio = &tlv320aic23b_audio_ops,
130};
131
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133
134
135
136
137
138
139
140
141static int tlv320aic23b_probe(struct i2c_client *client,
142 const struct i2c_device_id *id)
143{
144 struct tlv320aic23b_state *state;
145 struct v4l2_subdev *sd;
146
147
148 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
149 return -EIO;
150
151 v4l_info(client, "chip found @ 0x%x (%s)\n",
152 client->addr << 1, client->adapter->name);
153
154 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
155 if (state == NULL)
156 return -ENOMEM;
157 sd = &state->sd;
158 v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops);
159
160
161
162
163 tlv320aic23b_write(sd, 15, 0x000);
164
165 tlv320aic23b_write(sd, 6, 0x00A);
166
167 tlv320aic23b_write(sd, 7, 0x049);
168
169 tlv320aic23b_write(sd, 0, 0x119);
170
171 tlv320aic23b_write(sd, 8, 0x000);
172
173 tlv320aic23b_write(sd, 9, 0x001);
174
175 v4l2_ctrl_handler_init(&state->hdl, 1);
176 v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops,
177 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
178 sd->ctrl_handler = &state->hdl;
179 if (state->hdl.error) {
180 int err = state->hdl.error;
181
182 v4l2_ctrl_handler_free(&state->hdl);
183 return err;
184 }
185 v4l2_ctrl_handler_setup(&state->hdl);
186 return 0;
187}
188
189static int tlv320aic23b_remove(struct i2c_client *client)
190{
191 struct v4l2_subdev *sd = i2c_get_clientdata(client);
192 struct tlv320aic23b_state *state = to_state(sd);
193
194 v4l2_device_unregister_subdev(sd);
195 v4l2_ctrl_handler_free(&state->hdl);
196 return 0;
197}
198
199
200
201static const struct i2c_device_id tlv320aic23b_id[] = {
202 { "tlv320aic23b", 0 },
203 { }
204};
205MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id);
206
207static struct i2c_driver tlv320aic23b_driver = {
208 .driver = {
209 .name = "tlv320aic23b",
210 },
211 .probe = tlv320aic23b_probe,
212 .remove = tlv320aic23b_remove,
213 .id_table = tlv320aic23b_id,
214};
215
216module_i2c_driver(tlv320aic23b_driver);
217