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28#include <linux/module.h>
29#include <linux/types.h>
30#include <linux/slab.h>
31#include <linux/ioctl.h>
32#include <asm/uaccess.h>
33#include <linux/i2c.h>
34#include <linux/videodev2.h>
35#include <media/v4l2-device.h>
36#include <media/v4l2-ctrls.h>
37#include <media/wm8775.h>
38
39MODULE_DESCRIPTION("wm8775 driver");
40MODULE_AUTHOR("Ulf Eklund, Hans Verkuil");
41MODULE_LICENSE("GPL");
42
43
44
45
46
47enum {
48 R7 = 7, R11 = 11,
49 R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R23 = 23,
50 TOT_REGS
51};
52
53#define ALC_HOLD 0x85
54#define ALC_EN 0x100
55
56struct wm8775_state {
57 struct v4l2_subdev sd;
58 struct v4l2_ctrl_handler hdl;
59 struct v4l2_ctrl *mute;
60 struct v4l2_ctrl *vol;
61 struct v4l2_ctrl *bal;
62 struct v4l2_ctrl *loud;
63 u8 input;
64};
65
66static inline struct wm8775_state *to_state(struct v4l2_subdev *sd)
67{
68 return container_of(sd, struct wm8775_state, sd);
69}
70
71static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
72{
73 return &container_of(ctrl->handler, struct wm8775_state, hdl)->sd;
74}
75
76static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val)
77{
78 struct i2c_client *client = v4l2_get_subdevdata(sd);
79 int i;
80
81 if (reg < 0 || reg >= TOT_REGS) {
82 v4l2_err(sd, "Invalid register R%d\n", reg);
83 return -1;
84 }
85
86 for (i = 0; i < 3; i++)
87 if (i2c_smbus_write_byte_data(client,
88 (reg << 1) | (val >> 8), val & 0xff) == 0)
89 return 0;
90 v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
91 return -1;
92}
93
94static void wm8775_set_audio(struct v4l2_subdev *sd, int quietly)
95{
96 struct wm8775_state *state = to_state(sd);
97 u8 vol_l, vol_r;
98 int muted = 0 != state->mute->val;
99 u16 volume = (u16)state->vol->val;
100 u16 balance = (u16)state->bal->val;
101
102
103 vol_l = (min(65536 - balance, 32768) * volume) >> 23;
104 vol_r = (min(balance, (u16)32768) * volume) >> 23;
105
106
107 if (muted || quietly)
108 wm8775_write(sd, R21, 0x0c0 | state->input);
109
110 wm8775_write(sd, R14, vol_l | 0x100);
111 wm8775_write(sd, R15, vol_r | 0x100);
112
113
114 if (!muted)
115 wm8775_write(sd, R21, state->input);
116}
117
118static int wm8775_s_routing(struct v4l2_subdev *sd,
119 u32 input, u32 output, u32 config)
120{
121 struct wm8775_state *state = to_state(sd);
122
123
124
125
126
127
128 if (input > 15) {
129 v4l2_err(sd, "Invalid input %d.\n", input);
130 return -EINVAL;
131 }
132 state->input = input;
133 if (!v4l2_ctrl_g_ctrl(state->mute))
134 return 0;
135 if (!v4l2_ctrl_g_ctrl(state->vol))
136 return 0;
137 if (!v4l2_ctrl_g_ctrl(state->bal))
138 return 0;
139 wm8775_set_audio(sd, 1);
140 return 0;
141}
142
143static int wm8775_s_ctrl(struct v4l2_ctrl *ctrl)
144{
145 struct v4l2_subdev *sd = to_sd(ctrl);
146
147 switch (ctrl->id) {
148 case V4L2_CID_AUDIO_MUTE:
149 case V4L2_CID_AUDIO_VOLUME:
150 case V4L2_CID_AUDIO_BALANCE:
151 wm8775_set_audio(sd, 0);
152 return 0;
153 case V4L2_CID_AUDIO_LOUDNESS:
154 wm8775_write(sd, R17, (ctrl->val ? ALC_EN : 0) | ALC_HOLD);
155 return 0;
156 }
157 return -EINVAL;
158}
159
160static int wm8775_log_status(struct v4l2_subdev *sd)
161{
162 struct wm8775_state *state = to_state(sd);
163
164 v4l2_info(sd, "Input: %d\n", state->input);
165 v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
166 return 0;
167}
168
169static int wm8775_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq)
170{
171 wm8775_set_audio(sd, 0);
172 return 0;
173}
174
175
176
177static const struct v4l2_ctrl_ops wm8775_ctrl_ops = {
178 .s_ctrl = wm8775_s_ctrl,
179};
180
181static const struct v4l2_subdev_core_ops wm8775_core_ops = {
182 .log_status = wm8775_log_status,
183 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
184 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
185 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
186 .g_ctrl = v4l2_subdev_g_ctrl,
187 .s_ctrl = v4l2_subdev_s_ctrl,
188 .queryctrl = v4l2_subdev_queryctrl,
189 .querymenu = v4l2_subdev_querymenu,
190};
191
192static const struct v4l2_subdev_tuner_ops wm8775_tuner_ops = {
193 .s_frequency = wm8775_s_frequency,
194};
195
196static const struct v4l2_subdev_audio_ops wm8775_audio_ops = {
197 .s_routing = wm8775_s_routing,
198};
199
200static const struct v4l2_subdev_ops wm8775_ops = {
201 .core = &wm8775_core_ops,
202 .tuner = &wm8775_tuner_ops,
203 .audio = &wm8775_audio_ops,
204};
205
206
207
208
209
210
211
212
213
214
215static int wm8775_probe(struct i2c_client *client,
216 const struct i2c_device_id *id)
217{
218 struct wm8775_state *state;
219 struct v4l2_subdev *sd;
220 int err;
221 bool is_nova_s = false;
222
223 if (client->dev.platform_data) {
224 struct wm8775_platform_data *data = client->dev.platform_data;
225 is_nova_s = data->is_nova_s;
226 }
227
228
229 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
230 return -EIO;
231
232 v4l_info(client, "chip found @ 0x%02x (%s)\n",
233 client->addr << 1, client->adapter->name);
234
235 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
236 if (state == NULL)
237 return -ENOMEM;
238 sd = &state->sd;
239 v4l2_i2c_subdev_init(sd, client, &wm8775_ops);
240 state->input = 2;
241
242 v4l2_ctrl_handler_init(&state->hdl, 4);
243 state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
244 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
245 state->vol = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
246 V4L2_CID_AUDIO_VOLUME, 0, 65535, (65535+99)/100, 0xCF00);
247 state->bal = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
248 V4L2_CID_AUDIO_BALANCE, 0, 65535, (65535+99)/100, 32768);
249 state->loud = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
250 V4L2_CID_AUDIO_LOUDNESS, 0, 1, 1, 1);
251 sd->ctrl_handler = &state->hdl;
252 err = state->hdl.error;
253 if (err) {
254 v4l2_ctrl_handler_free(&state->hdl);
255 return err;
256 }
257
258
259
260
261 wm8775_write(sd, R23, 0x000);
262
263 wm8775_write(sd, R7, 0x000);
264
265 wm8775_write(sd, R11, 0x021);
266
267 wm8775_write(sd, R12, 0x102);
268
269 wm8775_write(sd, R13, 0x000);
270
271 if (!is_nova_s) {
272
273 wm8775_write(sd, R14, 0x1d4);
274
275 wm8775_write(sd, R15, 0x1d4);
276
277 wm8775_write(sd, R16, 0x1bf);
278
279
280 wm8775_write(sd, R17, 0x185);
281 } else {
282
283 wm8775_write(sd, R16, 0x1bb);
284
285 wm8775_write(sd, R17, (state->loud->val ? ALC_EN : 0) | ALC_HOLD);
286 }
287
288 wm8775_write(sd, R18, 0x0a2);
289
290 wm8775_write(sd, R19, 0x005);
291 if (!is_nova_s) {
292
293 wm8775_write(sd, R20, 0x07a);
294
295 wm8775_write(sd, R21, 0x102);
296 } else {
297
298 wm8775_write(sd, R20, 0x0fb);
299
300 wm8775_set_audio(sd, 1);
301 }
302 return 0;
303}
304
305static int wm8775_remove(struct i2c_client *client)
306{
307 struct v4l2_subdev *sd = i2c_get_clientdata(client);
308 struct wm8775_state *state = to_state(sd);
309
310 v4l2_device_unregister_subdev(sd);
311 v4l2_ctrl_handler_free(&state->hdl);
312 return 0;
313}
314
315static const struct i2c_device_id wm8775_id[] = {
316 { "wm8775", 0 },
317 { }
318};
319MODULE_DEVICE_TABLE(i2c, wm8775_id);
320
321static struct i2c_driver wm8775_driver = {
322 .driver = {
323 .owner = THIS_MODULE,
324 .name = "wm8775",
325 },
326 .probe = wm8775_probe,
327 .remove = wm8775_remove,
328 .id_table = wm8775_id,
329};
330
331module_i2c_driver(wm8775_driver);
332