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6#include <linux/module.h>
7#include <linux/init.h>
8#include <linux/i2c.h>
9#include <linux/videodev2.h>
10#include <media/tuner.h>
11#include <media/v4l2-common.h>
12#include <media/v4l2-ioctl.h>
13#include <media/v4l2-device.h>
14#include <linux/slab.h>
15
16MODULE_DESCRIPTION("sony-btf-mpx driver");
17MODULE_LICENSE("GPL v2");
18
19static int debug;
20module_param(debug, int, 0644);
21MODULE_PARM_DESC(debug, "debug level 0=off(default) 1=on");
22
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31
32
33static int force_mpx_mode = -1;
34module_param(force_mpx_mode, int, 0644);
35
36struct sony_btf_mpx {
37 struct v4l2_subdev sd;
38 int mpxmode;
39 u32 audmode;
40};
41
42static inline struct sony_btf_mpx *to_state(struct v4l2_subdev *sd)
43{
44 return container_of(sd, struct sony_btf_mpx, sd);
45}
46
47static int mpx_write(struct i2c_client *client, int dev, int addr, int val)
48{
49 u8 buffer[5];
50 struct i2c_msg msg;
51
52 buffer[0] = dev;
53 buffer[1] = addr >> 8;
54 buffer[2] = addr & 0xff;
55 buffer[3] = val >> 8;
56 buffer[4] = val & 0xff;
57 msg.addr = client->addr;
58 msg.flags = 0;
59 msg.len = 5;
60 msg.buf = buffer;
61 i2c_transfer(client->adapter, &msg, 1);
62 return 0;
63}
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116static const struct {
117 enum { AUD_MONO, AUD_A2, AUD_NICAM, AUD_NICAM_L } audio_mode;
118 u16 modus;
119 u16 source;
120 u16 acb;
121 u16 fm_prescale;
122 u16 nicam_prescale;
123 u16 scart_prescale;
124 u16 system;
125 u16 volume;
126} mpx_audio_modes[] = {
127 { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
128 0x5000, 0x0000, 0x0001, 0x7500 },
129 { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
130 0x5000, 0x0000, 0x0003, 0x7500 },
131 { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
132 0x5000, 0x0000, 0x0003, 0x7500 },
133 { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
134 0x5000, 0x0000, 0x0008, 0x7500 },
135 { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
136 0x7900, 0x0000, 0x000A, 0x7500 },
137 { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
138 0x7900, 0x0000, 0x000A, 0x7500 },
139 { AUD_MONO, 0x1003, 0x0020, 0x0100, 0x2603,
140 0x5000, 0x0000, 0x0004, 0x7500 },
141 { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
142 0x5000, 0x0000, 0x0004, 0x7500 },
143 { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
144 0x5000, 0x0000, 0x0005, 0x7500 },
145 { AUD_A2, 0x1003, 0x0020, 0x0100, 0x2601,
146 0x5000, 0x0000, 0x0007, 0x7500 },
147 { AUD_NICAM, 0x1003, 0x0120, 0x0100, 0x2603,
148 0x5000, 0x0000, 0x000B, 0x7500 },
149 { AUD_MONO, 0x0003, 0x0200, 0x0100, 0x7C03,
150 0x5000, 0x2200, 0x0009, 0x7500 },
151 { AUD_NICAM_L, 0x0003, 0x0120, 0x0100, 0x7C03,
152 0x5000, 0x0000, 0x0009, 0x7500 },
153};
154
155#define MPX_NUM_MODES ARRAY_SIZE(mpx_audio_modes)
156
157static int mpx_setup(struct sony_btf_mpx *t)
158{
159 struct i2c_client *client = v4l2_get_subdevdata(&t->sd);
160 u16 source = 0;
161 u8 buffer[3];
162 struct i2c_msg msg;
163 int mode = t->mpxmode;
164
165
166 buffer[0] = 0x00;
167 buffer[1] = 0x80;
168 buffer[2] = 0x00;
169 msg.addr = client->addr;
170 msg.flags = 0;
171 msg.len = 3;
172 msg.buf = buffer;
173 i2c_transfer(client->adapter, &msg, 1);
174 buffer[1] = 0x00;
175 i2c_transfer(client->adapter, &msg, 1);
176
177 if (t->audmode != V4L2_TUNER_MODE_MONO)
178 mode++;
179
180 if (mpx_audio_modes[mode].audio_mode != AUD_MONO) {
181 switch (t->audmode) {
182 case V4L2_TUNER_MODE_MONO:
183 switch (mpx_audio_modes[mode].audio_mode) {
184 case AUD_A2:
185 source = mpx_audio_modes[mode].source;
186 break;
187 case AUD_NICAM:
188 source = 0x0000;
189 break;
190 case AUD_NICAM_L:
191 source = 0x0200;
192 break;
193 default:
194 break;
195 }
196 break;
197 case V4L2_TUNER_MODE_STEREO:
198 source = mpx_audio_modes[mode].source;
199 break;
200 case V4L2_TUNER_MODE_LANG1:
201 source = 0x0300;
202 break;
203 case V4L2_TUNER_MODE_LANG2:
204 source = 0x0400;
205 break;
206 }
207 source |= mpx_audio_modes[mode].source & 0x00ff;
208 } else
209 source = mpx_audio_modes[mode].source;
210
211 mpx_write(client, 0x10, 0x0030, mpx_audio_modes[mode].modus);
212 mpx_write(client, 0x12, 0x0008, source);
213 mpx_write(client, 0x12, 0x0013, mpx_audio_modes[mode].acb);
214 mpx_write(client, 0x12, 0x000e,
215 mpx_audio_modes[mode].fm_prescale);
216 mpx_write(client, 0x12, 0x0010,
217 mpx_audio_modes[mode].nicam_prescale);
218 mpx_write(client, 0x12, 0x000d,
219 mpx_audio_modes[mode].scart_prescale);
220 mpx_write(client, 0x10, 0x0020, mpx_audio_modes[mode].system);
221 mpx_write(client, 0x12, 0x0000, mpx_audio_modes[mode].volume);
222 if (mpx_audio_modes[mode].audio_mode == AUD_A2)
223 mpx_write(client, 0x10, 0x0022,
224 t->audmode == V4L2_TUNER_MODE_MONO ? 0x07f0 : 0x0190);
225
226#ifdef MPX_DEBUG
227 {
228 u8 buf1[3], buf2[2];
229 struct i2c_msg msgs[2];
230
231 v4l2_info(client,
232 "MPX registers: %04x %04x %04x %04x %04x %04x %04x %04x\n",
233 mpx_audio_modes[mode].modus,
234 source,
235 mpx_audio_modes[mode].acb,
236 mpx_audio_modes[mode].fm_prescale,
237 mpx_audio_modes[mode].nicam_prescale,
238 mpx_audio_modes[mode].scart_prescale,
239 mpx_audio_modes[mode].system,
240 mpx_audio_modes[mode].volume);
241 buf1[0] = 0x11;
242 buf1[1] = 0x00;
243 buf1[2] = 0x7e;
244 msgs[0].addr = client->addr;
245 msgs[0].flags = 0;
246 msgs[0].len = 3;
247 msgs[0].buf = buf1;
248 msgs[1].addr = client->addr;
249 msgs[1].flags = I2C_M_RD;
250 msgs[1].len = 2;
251 msgs[1].buf = buf2;
252 i2c_transfer(client->adapter, msgs, 2);
253 v4l2_info(client, "MPX system: %02x%02x\n",
254 buf2[0], buf2[1]);
255 buf1[0] = 0x11;
256 buf1[1] = 0x02;
257 buf1[2] = 0x00;
258 i2c_transfer(client->adapter, msgs, 2);
259 v4l2_info(client, "MPX status: %02x%02x\n",
260 buf2[0], buf2[1]);
261 }
262#endif
263 return 0;
264}
265
266
267static int sony_btf_mpx_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
268{
269 struct sony_btf_mpx *t = to_state(sd);
270 int default_mpx_mode = 0;
271
272 if (std & V4L2_STD_PAL_BG)
273 default_mpx_mode = 1;
274 else if (std & V4L2_STD_PAL_I)
275 default_mpx_mode = 4;
276 else if (std & V4L2_STD_PAL_DK)
277 default_mpx_mode = 6;
278 else if (std & V4L2_STD_SECAM_L)
279 default_mpx_mode = 11;
280
281 if (default_mpx_mode != t->mpxmode) {
282 t->mpxmode = default_mpx_mode;
283 mpx_setup(t);
284 }
285 return 0;
286}
287
288static int sony_btf_mpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
289{
290 struct sony_btf_mpx *t = to_state(sd);
291
292 vt->capability = V4L2_TUNER_CAP_NORM |
293 V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 |
294 V4L2_TUNER_CAP_LANG2;
295 vt->rxsubchans = V4L2_TUNER_SUB_MONO |
296 V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_LANG1 |
297 V4L2_TUNER_SUB_LANG2;
298 vt->audmode = t->audmode;
299 return 0;
300}
301
302static int sony_btf_mpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
303{
304 struct sony_btf_mpx *t = to_state(sd);
305
306 if (vt->type != V4L2_TUNER_ANALOG_TV)
307 return -EINVAL;
308
309 if (vt->audmode != t->audmode) {
310 t->audmode = vt->audmode;
311 mpx_setup(t);
312 }
313 return 0;
314}
315
316
317
318static const struct v4l2_subdev_tuner_ops sony_btf_mpx_tuner_ops = {
319 .s_tuner = sony_btf_mpx_s_tuner,
320 .g_tuner = sony_btf_mpx_g_tuner,
321};
322
323static const struct v4l2_subdev_video_ops sony_btf_mpx_video_ops = {
324 .s_std = sony_btf_mpx_s_std,
325};
326
327static const struct v4l2_subdev_ops sony_btf_mpx_ops = {
328 .tuner = &sony_btf_mpx_tuner_ops,
329 .video = &sony_btf_mpx_video_ops,
330};
331
332
333
334static int sony_btf_mpx_probe(struct i2c_client *client,
335 const struct i2c_device_id *id)
336{
337 struct sony_btf_mpx *t;
338 struct v4l2_subdev *sd;
339
340 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
341 return -ENODEV;
342
343 v4l_info(client, "chip found @ 0x%x (%s)\n",
344 client->addr << 1, client->adapter->name);
345
346 t = devm_kzalloc(&client->dev, sizeof(*t), GFP_KERNEL);
347 if (t == NULL)
348 return -ENOMEM;
349
350 sd = &t->sd;
351 v4l2_i2c_subdev_init(sd, client, &sony_btf_mpx_ops);
352
353
354 t->mpxmode = 0;
355 t->audmode = V4L2_TUNER_MODE_STEREO;
356
357 return 0;
358}
359
360static int sony_btf_mpx_remove(struct i2c_client *client)
361{
362 struct v4l2_subdev *sd = i2c_get_clientdata(client);
363
364 v4l2_device_unregister_subdev(sd);
365
366 return 0;
367}
368
369
370
371static const struct i2c_device_id sony_btf_mpx_id[] = {
372 { "sony-btf-mpx", 0 },
373 { }
374};
375MODULE_DEVICE_TABLE(i2c, sony_btf_mpx_id);
376
377static struct i2c_driver sony_btf_mpx_driver = {
378 .driver = {
379 .name = "sony-btf-mpx",
380 },
381 .probe = sony_btf_mpx_probe,
382 .remove = sony_btf_mpx_remove,
383 .id_table = sony_btf_mpx_id,
384};
385module_i2c_driver(sony_btf_mpx_driver);
386
