1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 Montage Technology TS2020 - Silicon Tuner driver
4 Copyright (C) 2009-2012 Konstantin Dimitrov <kosio.dimitrov@gmail.com>
5
6 Copyright (C) 2009-2012 TurboSight.com
7
8 */
9
10 #include <media/dvb_frontend.h>
11 #include "ts2020.h"
12 #include <linux/regmap.h>
13 #include <linux/math64.h>
14
15 #define TS2020_XTAL_FREQ 27000 /* in kHz */
16 #define FREQ_OFFSET_LOW_SYM_RATE 3000
17
18 struct ts2020_priv {
19 struct i2c_client *client;
20 struct mutex regmap_mutex;
21 struct regmap_config regmap_config;
22 struct regmap *regmap;
23 struct dvb_frontend *fe;
24 struct delayed_work stat_work;
25 int (*get_agc_pwm)(struct dvb_frontend *fe, u8 *_agc_pwm);
26 /* i2c details */
27 struct i2c_adapter *i2c;
28 int i2c_address;
29 bool loop_through:1;
30 u8 clk_out:2;
31 u8 clk_out_div:5;
32 bool dont_poll:1;
33 u32 frequency_div; /* LO output divider switch frequency */
34 u32 frequency_khz; /* actual used LO frequency */
35 #define TS2020_M88TS2020 0
36 #define TS2020_M88TS2022 1
37 u8 tuner;
38 };
39
40 struct ts2020_reg_val {
41 u8 reg;
42 u8 val;
43 };
44
45 static void ts2020_stat_work(struct work_struct *work);
46
ts2020_release(struct dvb_frontend * fe)47 static void ts2020_release(struct dvb_frontend *fe)
48 {
49 struct ts2020_priv *priv = fe->tuner_priv;
50 struct i2c_client *client = priv->client;
51
52 dev_dbg(&client->dev, "\n");
53
54 i2c_unregister_device(client);
55 }
56
ts2020_sleep(struct dvb_frontend * fe)57 static int ts2020_sleep(struct dvb_frontend *fe)
58 {
59 struct ts2020_priv *priv = fe->tuner_priv;
60 int ret;
61 u8 u8tmp;
62
63 if (priv->tuner == TS2020_M88TS2020)
64 u8tmp = 0x0a; /* XXX: probably wrong */
65 else
66 u8tmp = 0x00;
67
68 ret = regmap_write(priv->regmap, u8tmp, 0x00);
69 if (ret < 0)
70 return ret;
71
72 /* stop statistics polling */
73 if (!priv->dont_poll)
74 cancel_delayed_work_sync(&priv->stat_work);
75 return 0;
76 }
77
ts2020_init(struct dvb_frontend * fe)78 static int ts2020_init(struct dvb_frontend *fe)
79 {
80 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
81 struct ts2020_priv *priv = fe->tuner_priv;
82 int i;
83 u8 u8tmp;
84
85 if (priv->tuner == TS2020_M88TS2020) {
86 regmap_write(priv->regmap, 0x42, 0x73);
87 regmap_write(priv->regmap, 0x05, priv->clk_out_div);
88 regmap_write(priv->regmap, 0x20, 0x27);
89 regmap_write(priv->regmap, 0x07, 0x02);
90 regmap_write(priv->regmap, 0x11, 0xff);
91 regmap_write(priv->regmap, 0x60, 0xf9);
92 regmap_write(priv->regmap, 0x08, 0x01);
93 regmap_write(priv->regmap, 0x00, 0x41);
94 } else {
95 static const struct ts2020_reg_val reg_vals[] = {
96 {0x7d, 0x9d},
97 {0x7c, 0x9a},
98 {0x7a, 0x76},
99 {0x3b, 0x01},
100 {0x63, 0x88},
101 {0x61, 0x85},
102 {0x22, 0x30},
103 {0x30, 0x40},
104 {0x20, 0x23},
105 {0x24, 0x02},
106 {0x12, 0xa0},
107 };
108
109 regmap_write(priv->regmap, 0x00, 0x01);
110 regmap_write(priv->regmap, 0x00, 0x03);
111
112 switch (priv->clk_out) {
113 case TS2020_CLK_OUT_DISABLED:
114 u8tmp = 0x60;
115 break;
116 case TS2020_CLK_OUT_ENABLED:
117 u8tmp = 0x70;
118 regmap_write(priv->regmap, 0x05, priv->clk_out_div);
119 break;
120 case TS2020_CLK_OUT_ENABLED_XTALOUT:
121 u8tmp = 0x6c;
122 break;
123 default:
124 u8tmp = 0x60;
125 break;
126 }
127
128 regmap_write(priv->regmap, 0x42, u8tmp);
129
130 if (priv->loop_through)
131 u8tmp = 0xec;
132 else
133 u8tmp = 0x6c;
134
135 regmap_write(priv->regmap, 0x62, u8tmp);
136
137 for (i = 0; i < ARRAY_SIZE(reg_vals); i++)
138 regmap_write(priv->regmap, reg_vals[i].reg,
139 reg_vals[i].val);
140 }
141
142 /* Initialise v5 stats here */
143 c->strength.len = 1;
144 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
145 c->strength.stat[0].uvalue = 0;
146
147 /* Start statistics polling by invoking the work function */
148 ts2020_stat_work(&priv->stat_work.work);
149 return 0;
150 }
151
ts2020_tuner_gate_ctrl(struct dvb_frontend * fe,u8 offset)152 static int ts2020_tuner_gate_ctrl(struct dvb_frontend *fe, u8 offset)
153 {
154 struct ts2020_priv *priv = fe->tuner_priv;
155 int ret;
156 ret = regmap_write(priv->regmap, 0x51, 0x1f - offset);
157 ret |= regmap_write(priv->regmap, 0x51, 0x1f);
158 ret |= regmap_write(priv->regmap, 0x50, offset);
159 ret |= regmap_write(priv->regmap, 0x50, 0x00);
160 msleep(20);
161 return ret;
162 }
163
ts2020_set_tuner_rf(struct dvb_frontend * fe)164 static int ts2020_set_tuner_rf(struct dvb_frontend *fe)
165 {
166 struct ts2020_priv *dev = fe->tuner_priv;
167 int ret;
168 unsigned int utmp;
169
170 ret = regmap_read(dev->regmap, 0x3d, &utmp);
171 if (ret)
172 return ret;
173
174 utmp &= 0x7f;
175 if (utmp < 0x16)
176 utmp = 0xa1;
177 else if (utmp == 0x16)
178 utmp = 0x99;
179 else
180 utmp = 0xf9;
181
182 regmap_write(dev->regmap, 0x60, utmp);
183 ret = ts2020_tuner_gate_ctrl(fe, 0x08);
184
185 return ret;
186 }
187
ts2020_set_params(struct dvb_frontend * fe)188 static int ts2020_set_params(struct dvb_frontend *fe)
189 {
190 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
191 struct ts2020_priv *priv = fe->tuner_priv;
192 int ret;
193 unsigned int utmp;
194 u32 f3db, gdiv28;
195 u16 u16tmp, value, lpf_coeff;
196 u8 buf[3], reg10, lpf_mxdiv, mlpf_max, mlpf_min, nlpf;
197 unsigned int f_ref_khz, f_vco_khz, div_ref, div_out, pll_n;
198 unsigned int frequency_khz = c->frequency;
199
200 /*
201 * Integer-N PLL synthesizer
202 * kHz is used for all calculations to keep calculations within 32-bit
203 */
204 f_ref_khz = TS2020_XTAL_FREQ;
205 div_ref = DIV_ROUND_CLOSEST(f_ref_khz, 2000);
206
207 /* select LO output divider */
208 if (frequency_khz < priv->frequency_div) {
209 div_out = 4;
210 reg10 = 0x10;
211 } else {
212 div_out = 2;
213 reg10 = 0x00;
214 }
215
216 f_vco_khz = frequency_khz * div_out;
217 pll_n = f_vco_khz * div_ref / f_ref_khz;
218 pll_n += pll_n % 2;
219 priv->frequency_khz = pll_n * f_ref_khz / div_ref / div_out;
220
221 pr_debug("frequency=%u offset=%d f_vco_khz=%u pll_n=%u div_ref=%u div_out=%u\n",
222 priv->frequency_khz, priv->frequency_khz - c->frequency,
223 f_vco_khz, pll_n, div_ref, div_out);
224
225 if (priv->tuner == TS2020_M88TS2020) {
226 lpf_coeff = 2766;
227 reg10 |= 0x01;
228 ret = regmap_write(priv->regmap, 0x10, reg10);
229 } else {
230 lpf_coeff = 3200;
231 reg10 |= 0x0b;
232 ret = regmap_write(priv->regmap, 0x10, reg10);
233 ret |= regmap_write(priv->regmap, 0x11, 0x40);
234 }
235
236 u16tmp = pll_n - 1024;
237 buf[0] = (u16tmp >> 8) & 0xff;
238 buf[1] = (u16tmp >> 0) & 0xff;
239 buf[2] = div_ref - 8;
240
241 ret |= regmap_write(priv->regmap, 0x01, buf[0]);
242 ret |= regmap_write(priv->regmap, 0x02, buf[1]);
243 ret |= regmap_write(priv->regmap, 0x03, buf[2]);
244
245 ret |= ts2020_tuner_gate_ctrl(fe, 0x10);
246 if (ret < 0)
247 return -ENODEV;
248
249 ret |= ts2020_tuner_gate_ctrl(fe, 0x08);
250
251 /* Tuner RF */
252 if (priv->tuner == TS2020_M88TS2020)
253 ret |= ts2020_set_tuner_rf(fe);
254
255 gdiv28 = (TS2020_XTAL_FREQ / 1000 * 1694 + 500) / 1000;
256 ret |= regmap_write(priv->regmap, 0x04, gdiv28 & 0xff);
257 ret |= ts2020_tuner_gate_ctrl(fe, 0x04);
258 if (ret < 0)
259 return -ENODEV;
260
261 if (priv->tuner == TS2020_M88TS2022) {
262 ret = regmap_write(priv->regmap, 0x25, 0x00);
263 ret |= regmap_write(priv->regmap, 0x27, 0x70);
264 ret |= regmap_write(priv->regmap, 0x41, 0x09);
265 ret |= regmap_write(priv->regmap, 0x08, 0x0b);
266 if (ret < 0)
267 return -ENODEV;
268 }
269
270 regmap_read(priv->regmap, 0x26, &utmp);
271 value = utmp;
272
273 f3db = (c->bandwidth_hz / 1000 / 2) + 2000;
274 f3db += FREQ_OFFSET_LOW_SYM_RATE; /* FIXME: ~always too wide filter */
275 f3db = clamp(f3db, 7000U, 40000U);
276
277 gdiv28 = gdiv28 * 207 / (value * 2 + 151);
278 mlpf_max = gdiv28 * 135 / 100;
279 mlpf_min = gdiv28 * 78 / 100;
280 if (mlpf_max > 63)
281 mlpf_max = 63;
282
283 nlpf = (f3db * gdiv28 * 2 / lpf_coeff /
284 (TS2020_XTAL_FREQ / 1000) + 1) / 2;
285 if (nlpf > 23)
286 nlpf = 23;
287 if (nlpf < 1)
288 nlpf = 1;
289
290 lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000)
291 * lpf_coeff * 2 / f3db + 1) / 2;
292
293 if (lpf_mxdiv < mlpf_min) {
294 nlpf++;
295 lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000)
296 * lpf_coeff * 2 / f3db + 1) / 2;
297 }
298
299 if (lpf_mxdiv > mlpf_max)
300 lpf_mxdiv = mlpf_max;
301
302 ret = regmap_write(priv->regmap, 0x04, lpf_mxdiv);
303 ret |= regmap_write(priv->regmap, 0x06, nlpf);
304
305 ret |= ts2020_tuner_gate_ctrl(fe, 0x04);
306
307 ret |= ts2020_tuner_gate_ctrl(fe, 0x01);
308
309 msleep(80);
310
311 return (ret < 0) ? -EINVAL : 0;
312 }
313
ts2020_get_frequency(struct dvb_frontend * fe,u32 * frequency)314 static int ts2020_get_frequency(struct dvb_frontend *fe, u32 *frequency)
315 {
316 struct ts2020_priv *priv = fe->tuner_priv;
317
318 *frequency = priv->frequency_khz;
319 return 0;
320 }
321
ts2020_get_if_frequency(struct dvb_frontend * fe,u32 * frequency)322 static int ts2020_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
323 {
324 *frequency = 0; /* Zero-IF */
325 return 0;
326 }
327
328 /*
329 * Get the tuner gain.
330 * @fe: The front end for which we're determining the gain
331 * @v_agc: The voltage of the AGC from the demodulator (0-2600mV)
332 * @_gain: Where to store the gain (in 0.001dB units)
333 *
334 * Returns 0 or a negative error code.
335 */
ts2020_read_tuner_gain(struct dvb_frontend * fe,unsigned v_agc,__s64 * _gain)336 static int ts2020_read_tuner_gain(struct dvb_frontend *fe, unsigned v_agc,
337 __s64 *_gain)
338 {
339 struct ts2020_priv *priv = fe->tuner_priv;
340 unsigned long gain1, gain2, gain3;
341 unsigned utmp;
342 int ret;
343
344 /* Read the RF gain */
345 ret = regmap_read(priv->regmap, 0x3d, &utmp);
346 if (ret < 0)
347 return ret;
348 gain1 = utmp & 0x1f;
349
350 /* Read the baseband gain */
351 ret = regmap_read(priv->regmap, 0x21, &utmp);
352 if (ret < 0)
353 return ret;
354 gain2 = utmp & 0x1f;
355
356 switch (priv->tuner) {
357 case TS2020_M88TS2020:
358 gain1 = clamp_t(long, gain1, 0, 15);
359 gain2 = clamp_t(long, gain2, 0, 13);
360 v_agc = clamp_t(long, v_agc, 400, 1100);
361
362 *_gain = -((__s64)gain1 * 2330 +
363 gain2 * 3500 +
364 v_agc * 24 / 10 * 10 +
365 10000);
366 /* gain in range -19600 to -116850 in units of 0.001dB */
367 break;
368
369 case TS2020_M88TS2022:
370 ret = regmap_read(priv->regmap, 0x66, &utmp);
371 if (ret < 0)
372 return ret;
373 gain3 = (utmp >> 3) & 0x07;
374
375 gain1 = clamp_t(long, gain1, 0, 15);
376 gain2 = clamp_t(long, gain2, 2, 16);
377 gain3 = clamp_t(long, gain3, 0, 6);
378 v_agc = clamp_t(long, v_agc, 600, 1600);
379
380 *_gain = -((__s64)gain1 * 2650 +
381 gain2 * 3380 +
382 gain3 * 2850 +
383 v_agc * 176 / 100 * 10 -
384 30000);
385 /* gain in range -47320 to -158950 in units of 0.001dB */
386 break;
387 }
388
389 return 0;
390 }
391
392 /*
393 * Get the AGC information from the demodulator and use that to calculate the
394 * tuner gain.
395 */
ts2020_get_tuner_gain(struct dvb_frontend * fe,__s64 * _gain)396 static int ts2020_get_tuner_gain(struct dvb_frontend *fe, __s64 *_gain)
397 {
398 struct ts2020_priv *priv = fe->tuner_priv;
399 int v_agc = 0, ret;
400 u8 agc_pwm;
401
402 /* Read the AGC PWM rate from the demodulator */
403 if (priv->get_agc_pwm) {
404 ret = priv->get_agc_pwm(fe, &agc_pwm);
405 if (ret < 0)
406 return ret;
407
408 switch (priv->tuner) {
409 case TS2020_M88TS2020:
410 v_agc = (int)agc_pwm * 20 - 1166;
411 break;
412 case TS2020_M88TS2022:
413 v_agc = (int)agc_pwm * 16 - 670;
414 break;
415 }
416
417 if (v_agc < 0)
418 v_agc = 0;
419 }
420
421 return ts2020_read_tuner_gain(fe, v_agc, _gain);
422 }
423
424 /*
425 * Gather statistics on a regular basis
426 */
ts2020_stat_work(struct work_struct * work)427 static void ts2020_stat_work(struct work_struct *work)
428 {
429 struct ts2020_priv *priv = container_of(work, struct ts2020_priv,
430 stat_work.work);
431 struct i2c_client *client = priv->client;
432 struct dtv_frontend_properties *c = &priv->fe->dtv_property_cache;
433 int ret;
434
435 dev_dbg(&client->dev, "\n");
436
437 ret = ts2020_get_tuner_gain(priv->fe, &c->strength.stat[0].svalue);
438 if (ret < 0)
439 goto err;
440
441 c->strength.stat[0].scale = FE_SCALE_DECIBEL;
442
443 if (!priv->dont_poll)
444 schedule_delayed_work(&priv->stat_work, msecs_to_jiffies(2000));
445 return;
446 err:
447 dev_dbg(&client->dev, "failed=%d\n", ret);
448 }
449
450 /*
451 * Read TS2020 signal strength in v3 format.
452 */
ts2020_read_signal_strength(struct dvb_frontend * fe,u16 * _signal_strength)453 static int ts2020_read_signal_strength(struct dvb_frontend *fe,
454 u16 *_signal_strength)
455 {
456 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
457 struct ts2020_priv *priv = fe->tuner_priv;
458 unsigned strength;
459 __s64 gain;
460
461 if (priv->dont_poll)
462 ts2020_stat_work(&priv->stat_work.work);
463
464 if (c->strength.stat[0].scale == FE_SCALE_NOT_AVAILABLE) {
465 *_signal_strength = 0;
466 return 0;
467 }
468
469 gain = c->strength.stat[0].svalue;
470
471 /* Calculate the signal strength based on the total gain of the tuner */
472 if (gain < -85000)
473 /* 0%: no signal or weak signal */
474 strength = 0;
475 else if (gain < -65000)
476 /* 0% - 60%: weak signal */
477 strength = 0 + div64_s64((85000 + gain) * 3, 1000);
478 else if (gain < -45000)
479 /* 60% - 90%: normal signal */
480 strength = 60 + div64_s64((65000 + gain) * 3, 2000);
481 else
482 /* 90% - 99%: strong signal */
483 strength = 90 + div64_s64((45000 + gain), 5000);
484
485 *_signal_strength = strength * 65535 / 100;
486 return 0;
487 }
488
489 static const struct dvb_tuner_ops ts2020_tuner_ops = {
490 .info = {
491 .name = "TS2020",
492 .frequency_min_hz = 950 * MHz,
493 .frequency_max_hz = 2150 * MHz
494 },
495 .init = ts2020_init,
496 .release = ts2020_release,
497 .sleep = ts2020_sleep,
498 .set_params = ts2020_set_params,
499 .get_frequency = ts2020_get_frequency,
500 .get_if_frequency = ts2020_get_if_frequency,
501 .get_rf_strength = ts2020_read_signal_strength,
502 };
503
ts2020_attach(struct dvb_frontend * fe,const struct ts2020_config * config,struct i2c_adapter * i2c)504 struct dvb_frontend *ts2020_attach(struct dvb_frontend *fe,
505 const struct ts2020_config *config,
506 struct i2c_adapter *i2c)
507 {
508 struct i2c_client *client;
509 struct i2c_board_info board_info;
510
511 /* This is only used by ts2020_probe() so can be on the stack */
512 struct ts2020_config pdata;
513
514 memcpy(&pdata, config, sizeof(pdata));
515 pdata.fe = fe;
516 pdata.attach_in_use = true;
517
518 memset(&board_info, 0, sizeof(board_info));
519 strscpy(board_info.type, "ts2020", I2C_NAME_SIZE);
520 board_info.addr = config->tuner_address;
521 board_info.platform_data = &pdata;
522 client = i2c_new_client_device(i2c, &board_info);
523 if (!i2c_client_has_driver(client))
524 return NULL;
525
526 return fe;
527 }
528 EXPORT_SYMBOL_GPL(ts2020_attach);
529
530 /*
531 * We implement own regmap locking due to legacy DVB attach which uses frontend
532 * gate control callback to control I2C bus access. We can open / close gate and
533 * serialize whole open / I2C-operation / close sequence at the same.
534 */
ts2020_regmap_lock(void * __dev)535 static void ts2020_regmap_lock(void *__dev)
536 {
537 struct ts2020_priv *dev = __dev;
538
539 mutex_lock(&dev->regmap_mutex);
540 if (dev->fe->ops.i2c_gate_ctrl)
541 dev->fe->ops.i2c_gate_ctrl(dev->fe, 1);
542 }
543
ts2020_regmap_unlock(void * __dev)544 static void ts2020_regmap_unlock(void *__dev)
545 {
546 struct ts2020_priv *dev = __dev;
547
548 if (dev->fe->ops.i2c_gate_ctrl)
549 dev->fe->ops.i2c_gate_ctrl(dev->fe, 0);
550 mutex_unlock(&dev->regmap_mutex);
551 }
552
ts2020_probe(struct i2c_client * client)553 static int ts2020_probe(struct i2c_client *client)
554 {
555 struct ts2020_config *pdata = client->dev.platform_data;
556 struct dvb_frontend *fe;
557 struct ts2020_priv *dev;
558 int ret;
559 u8 u8tmp;
560 unsigned int utmp;
561 char *chip_str;
562
563 if (!pdata) {
564 dev_err(&client->dev, "platform data is mandatory\n");
565 return -EINVAL;
566 }
567
568 fe = pdata->fe;
569 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
570 if (!dev) {
571 ret = -ENOMEM;
572 goto err;
573 }
574
575 /* create regmap */
576 mutex_init(&dev->regmap_mutex);
577 dev->regmap_config.reg_bits = 8;
578 dev->regmap_config.val_bits = 8;
579 dev->regmap_config.lock = ts2020_regmap_lock;
580 dev->regmap_config.unlock = ts2020_regmap_unlock;
581 dev->regmap_config.lock_arg = dev;
582 dev->regmap = regmap_init_i2c(client, &dev->regmap_config);
583 if (IS_ERR(dev->regmap)) {
584 ret = PTR_ERR(dev->regmap);
585 goto err_kfree;
586 }
587
588 dev->i2c = client->adapter;
589 dev->i2c_address = client->addr;
590 dev->loop_through = pdata->loop_through;
591 dev->clk_out = pdata->clk_out;
592 dev->clk_out_div = pdata->clk_out_div;
593 dev->dont_poll = pdata->dont_poll;
594 dev->frequency_div = pdata->frequency_div;
595 dev->fe = fe;
596 dev->get_agc_pwm = pdata->get_agc_pwm;
597 fe->tuner_priv = dev;
598 dev->client = client;
599 INIT_DELAYED_WORK(&dev->stat_work, ts2020_stat_work);
600
601 /* check if the tuner is there */
602 ret = regmap_read(dev->regmap, 0x00, &utmp);
603 if (ret)
604 goto err_regmap_exit;
605
606 if ((utmp & 0x03) == 0x00) {
607 ret = regmap_write(dev->regmap, 0x00, 0x01);
608 if (ret)
609 goto err_regmap_exit;
610
611 usleep_range(2000, 50000);
612 }
613
614 ret = regmap_write(dev->regmap, 0x00, 0x03);
615 if (ret)
616 goto err_regmap_exit;
617
618 usleep_range(2000, 50000);
619
620 ret = regmap_read(dev->regmap, 0x00, &utmp);
621 if (ret)
622 goto err_regmap_exit;
623
624 dev_dbg(&client->dev, "chip_id=%02x\n", utmp);
625
626 switch (utmp) {
627 case 0x01:
628 case 0x41:
629 case 0x81:
630 dev->tuner = TS2020_M88TS2020;
631 chip_str = "TS2020";
632 if (!dev->frequency_div)
633 dev->frequency_div = 1060000;
634 break;
635 case 0xc3:
636 case 0x83:
637 dev->tuner = TS2020_M88TS2022;
638 chip_str = "TS2022";
639 if (!dev->frequency_div)
640 dev->frequency_div = 1103000;
641 break;
642 default:
643 ret = -ENODEV;
644 goto err_regmap_exit;
645 }
646
647 if (dev->tuner == TS2020_M88TS2022) {
648 switch (dev->clk_out) {
649 case TS2020_CLK_OUT_DISABLED:
650 u8tmp = 0x60;
651 break;
652 case TS2020_CLK_OUT_ENABLED:
653 u8tmp = 0x70;
654 ret = regmap_write(dev->regmap, 0x05, dev->clk_out_div);
655 if (ret)
656 goto err_regmap_exit;
657 break;
658 case TS2020_CLK_OUT_ENABLED_XTALOUT:
659 u8tmp = 0x6c;
660 break;
661 default:
662 ret = -EINVAL;
663 goto err_regmap_exit;
664 }
665
666 ret = regmap_write(dev->regmap, 0x42, u8tmp);
667 if (ret)
668 goto err_regmap_exit;
669
670 if (dev->loop_through)
671 u8tmp = 0xec;
672 else
673 u8tmp = 0x6c;
674
675 ret = regmap_write(dev->regmap, 0x62, u8tmp);
676 if (ret)
677 goto err_regmap_exit;
678 }
679
680 /* sleep */
681 ret = regmap_write(dev->regmap, 0x00, 0x00);
682 if (ret)
683 goto err_regmap_exit;
684
685 dev_info(&client->dev,
686 "Montage Technology %s successfully identified\n", chip_str);
687
688 memcpy(&fe->ops.tuner_ops, &ts2020_tuner_ops,
689 sizeof(struct dvb_tuner_ops));
690 if (!pdata->attach_in_use)
691 fe->ops.tuner_ops.release = NULL;
692
693 i2c_set_clientdata(client, dev);
694 return 0;
695 err_regmap_exit:
696 regmap_exit(dev->regmap);
697 err_kfree:
698 kfree(dev);
699 err:
700 dev_dbg(&client->dev, "failed=%d\n", ret);
701 return ret;
702 }
703
ts2020_remove(struct i2c_client * client)704 static void ts2020_remove(struct i2c_client *client)
705 {
706 struct ts2020_priv *dev = i2c_get_clientdata(client);
707
708 dev_dbg(&client->dev, "\n");
709
710 /* stop statistics polling */
711 if (!dev->dont_poll)
712 cancel_delayed_work_sync(&dev->stat_work);
713
714 regmap_exit(dev->regmap);
715 kfree(dev);
716 }
717
718 static const struct i2c_device_id ts2020_id_table[] = {
719 { "ts2020" },
720 { "ts2022" },
721 {}
722 };
723 MODULE_DEVICE_TABLE(i2c, ts2020_id_table);
724
725 static struct i2c_driver ts2020_driver = {
726 .driver = {
727 .name = "ts2020",
728 },
729 .probe = ts2020_probe,
730 .remove = ts2020_remove,
731 .id_table = ts2020_id_table,
732 };
733
734 module_i2c_driver(ts2020_driver);
735
736 MODULE_AUTHOR("Konstantin Dimitrov <kosio.dimitrov@gmail.com>");
737 MODULE_DESCRIPTION("Montage Technology TS2020 - Silicon tuner driver module");
738 MODULE_LICENSE("GPL");
739