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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-chip-ident.h>
28#include <media/v4l2-ctrls.h>
29
30MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
31MODULE_AUTHOR("Hans Verkuil");
32MODULE_LICENSE("GPL");
33
34static bool debug;
35
36module_param(debug, bool, 0644);
37
38MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
39
40struct cs5345_state {
41 struct v4l2_subdev sd;
42 struct v4l2_ctrl_handler hdl;
43};
44
45static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)
46{
47 return container_of(sd, struct cs5345_state, sd);
48}
49
50static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
51{
52 return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;
53}
54
55
56
57static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
58{
59 struct i2c_client *client = v4l2_get_subdevdata(sd);
60
61 return i2c_smbus_write_byte_data(client, reg, value);
62}
63
64static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
65{
66 struct i2c_client *client = v4l2_get_subdevdata(sd);
67
68 return i2c_smbus_read_byte_data(client, reg);
69}
70
71static int cs5345_s_routing(struct v4l2_subdev *sd,
72 u32 input, u32 output, u32 config)
73{
74 if ((input & 0xf) > 6) {
75 v4l2_err(sd, "Invalid input %d.\n", input);
76 return -EINVAL;
77 }
78 cs5345_write(sd, 0x09, input & 0xf);
79 cs5345_write(sd, 0x05, input & 0xf0);
80 return 0;
81}
82
83static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl)
84{
85 struct v4l2_subdev *sd = to_sd(ctrl);
86
87 switch (ctrl->id) {
88 case V4L2_CID_AUDIO_MUTE:
89 cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0);
90 return 0;
91 case V4L2_CID_AUDIO_VOLUME:
92 cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f);
93 cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f);
94 return 0;
95 }
96 return -EINVAL;
97}
98
99#ifdef CONFIG_VIDEO_ADV_DEBUG
100static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
101{
102 struct i2c_client *client = v4l2_get_subdevdata(sd);
103
104 if (!v4l2_chip_match_i2c_client(client, ®->match))
105 return -EINVAL;
106 if (!capable(CAP_SYS_ADMIN))
107 return -EPERM;
108 reg->size = 1;
109 reg->val = cs5345_read(sd, reg->reg & 0x1f);
110 return 0;
111}
112
113static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
114{
115 struct i2c_client *client = v4l2_get_subdevdata(sd);
116
117 if (!v4l2_chip_match_i2c_client(client, ®->match))
118 return -EINVAL;
119 if (!capable(CAP_SYS_ADMIN))
120 return -EPERM;
121 cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
122 return 0;
123}
124#endif
125
126static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
127{
128 struct i2c_client *client = v4l2_get_subdevdata(sd);
129
130 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0);
131}
132
133static int cs5345_log_status(struct v4l2_subdev *sd)
134{
135 u8 v = cs5345_read(sd, 0x09) & 7;
136 u8 m = cs5345_read(sd, 0x04);
137 int vol = cs5345_read(sd, 0x08) & 0x3f;
138
139 v4l2_info(sd, "Input: %d%s\n", v,
140 (m & 0x80) ? " (muted)" : "");
141 if (vol >= 32)
142 vol = vol - 64;
143 v4l2_info(sd, "Volume: %d dB\n", vol);
144 return 0;
145}
146
147
148
149static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {
150 .s_ctrl = cs5345_s_ctrl,
151};
152
153static const struct v4l2_subdev_core_ops cs5345_core_ops = {
154 .log_status = cs5345_log_status,
155 .g_chip_ident = cs5345_g_chip_ident,
156 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
157 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
158 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
159 .g_ctrl = v4l2_subdev_g_ctrl,
160 .s_ctrl = v4l2_subdev_s_ctrl,
161 .queryctrl = v4l2_subdev_queryctrl,
162 .querymenu = v4l2_subdev_querymenu,
163#ifdef CONFIG_VIDEO_ADV_DEBUG
164 .g_register = cs5345_g_register,
165 .s_register = cs5345_s_register,
166#endif
167};
168
169static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
170 .s_routing = cs5345_s_routing,
171};
172
173static const struct v4l2_subdev_ops cs5345_ops = {
174 .core = &cs5345_core_ops,
175 .audio = &cs5345_audio_ops,
176};
177
178
179
180static int cs5345_probe(struct i2c_client *client,
181 const struct i2c_device_id *id)
182{
183 struct cs5345_state *state;
184 struct v4l2_subdev *sd;
185
186
187 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
188 return -EIO;
189
190 v4l_info(client, "chip found @ 0x%x (%s)\n",
191 client->addr << 1, client->adapter->name);
192
193 state = kzalloc(sizeof(struct cs5345_state), GFP_KERNEL);
194 if (state == NULL)
195 return -ENOMEM;
196 sd = &state->sd;
197 v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
198
199 v4l2_ctrl_handler_init(&state->hdl, 2);
200 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
201 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
202 v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
203 V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0);
204 sd->ctrl_handler = &state->hdl;
205 if (state->hdl.error) {
206 int err = state->hdl.error;
207
208 v4l2_ctrl_handler_free(&state->hdl);
209 kfree(state);
210 return err;
211 }
212
213 v4l2_ctrl_handler_setup(&state->hdl);
214
215 cs5345_write(sd, 0x02, 0x00);
216 cs5345_write(sd, 0x04, 0x01);
217 cs5345_write(sd, 0x09, 0x01);
218 return 0;
219}
220
221
222
223static int cs5345_remove(struct i2c_client *client)
224{
225 struct v4l2_subdev *sd = i2c_get_clientdata(client);
226 struct cs5345_state *state = to_state(sd);
227
228 v4l2_device_unregister_subdev(sd);
229 v4l2_ctrl_handler_free(&state->hdl);
230 kfree(state);
231 return 0;
232}
233
234
235
236static const struct i2c_device_id cs5345_id[] = {
237 { "cs5345", 0 },
238 { }
239};
240MODULE_DEVICE_TABLE(i2c, cs5345_id);
241
242static struct i2c_driver cs5345_driver = {
243 .driver = {
244 .owner = THIS_MODULE,
245 .name = "cs5345",
246 },
247 .probe = cs5345_probe,
248 .remove = cs5345_remove,
249 .id_table = cs5345_id,
250};
251
252module_i2c_driver(cs5345_driver);
253
