174ba9207SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
26fef4fc7SKonstantin Dimitrov /*
36fef4fc7SKonstantin Dimitrov Montage Technology TS2020 - Silicon Tuner driver
46fef4fc7SKonstantin Dimitrov Copyright (C) 2009-2012 Konstantin Dimitrov <kosio.dimitrov@gmail.com>
56fef4fc7SKonstantin Dimitrov
66fef4fc7SKonstantin Dimitrov Copyright (C) 2009-2012 TurboSight.com
76fef4fc7SKonstantin Dimitrov
86fef4fc7SKonstantin Dimitrov */
96fef4fc7SKonstantin Dimitrov
10fada1935SMauro Carvalho Chehab #include <media/dvb_frontend.h>
116fef4fc7SKonstantin Dimitrov #include "ts2020.h"
12f158cbceSAntti Palosaari #include <linux/regmap.h>
1387b09bd0SMauro Carvalho Chehab #include <linux/math64.h>
146fef4fc7SKonstantin Dimitrov
156fef4fc7SKonstantin Dimitrov #define TS2020_XTAL_FREQ 27000 /* in kHz */
16b858c331SIgor M. Liplianin #define FREQ_OFFSET_LOW_SYM_RATE 3000
176fef4fc7SKonstantin Dimitrov
18b858c331SIgor M. Liplianin struct ts2020_priv {
19e6ad9ce3SAntti Palosaari struct i2c_client *client;
20f158cbceSAntti Palosaari struct mutex regmap_mutex;
21f158cbceSAntti Palosaari struct regmap_config regmap_config;
22f158cbceSAntti Palosaari struct regmap *regmap;
23dc245a5fSAntti Palosaari struct dvb_frontend *fe;
243366cd5dSDavid Howells struct delayed_work stat_work;
250f91c9d6SDavid Howells int (*get_agc_pwm)(struct dvb_frontend *fe, u8 *_agc_pwm);
26b858c331SIgor M. Liplianin /* i2c details */
276fef4fc7SKonstantin Dimitrov struct i2c_adapter *i2c;
283366cd5dSDavid Howells int i2c_address;
290f20baadSDavid Howells bool loop_through:1;
30abd9025bSAntti Palosaari u8 clk_out:2;
31abd9025bSAntti Palosaari u8 clk_out_div:5;
32c7275ae1SDavid Howells bool dont_poll:1;
33af9d5255SAntti Palosaari u32 frequency_div; /* LO output divider switch frequency */
34af9d5255SAntti Palosaari u32 frequency_khz; /* actual used LO frequency */
35abd9025bSAntti Palosaari #define TS2020_M88TS2020 0
36abd9025bSAntti Palosaari #define TS2020_M88TS2022 1
37abd9025bSAntti Palosaari u8 tuner;
38abd9025bSAntti Palosaari };
39abd9025bSAntti Palosaari
40abd9025bSAntti Palosaari struct ts2020_reg_val {
41abd9025bSAntti Palosaari u8 reg;
42abd9025bSAntti Palosaari u8 val;
436fef4fc7SKonstantin Dimitrov };
446fef4fc7SKonstantin Dimitrov
45c7275ae1SDavid Howells static void ts2020_stat_work(struct work_struct *work);
46c7275ae1SDavid Howells
ts2020_release(struct dvb_frontend * fe)47194ced7aSMax Kellermann static void ts2020_release(struct dvb_frontend *fe)
48b858c331SIgor M. Liplianin {
49e6ad9ce3SAntti Palosaari struct ts2020_priv *priv = fe->tuner_priv;
50e6ad9ce3SAntti Palosaari struct i2c_client *client = priv->client;
51e6ad9ce3SAntti Palosaari
52e6ad9ce3SAntti Palosaari dev_dbg(&client->dev, "\n");
53e6ad9ce3SAntti Palosaari
54e6ad9ce3SAntti Palosaari i2c_unregister_device(client);
55b858c331SIgor M. Liplianin }
56b858c331SIgor M. Liplianin
ts2020_sleep(struct dvb_frontend * fe)57b858c331SIgor M. Liplianin static int ts2020_sleep(struct dvb_frontend *fe)
586fef4fc7SKonstantin Dimitrov {
59b858c331SIgor M. Liplianin struct ts2020_priv *priv = fe->tuner_priv;
603366cd5dSDavid Howells int ret;
61b3226f96SAntti Palosaari u8 u8tmp;
626fef4fc7SKonstantin Dimitrov
63b3226f96SAntti Palosaari if (priv->tuner == TS2020_M88TS2020)
64b3226f96SAntti Palosaari u8tmp = 0x0a; /* XXX: probably wrong */
65b3226f96SAntti Palosaari else
66b3226f96SAntti Palosaari u8tmp = 0x00;
67abd9025bSAntti Palosaari
683366cd5dSDavid Howells ret = regmap_write(priv->regmap, u8tmp, 0x00);
693366cd5dSDavid Howells if (ret < 0)
703366cd5dSDavid Howells return ret;
713366cd5dSDavid Howells
723366cd5dSDavid Howells /* stop statistics polling */
73c7275ae1SDavid Howells if (!priv->dont_poll)
743366cd5dSDavid Howells cancel_delayed_work_sync(&priv->stat_work);
753366cd5dSDavid Howells return 0;
766fef4fc7SKonstantin Dimitrov }
776fef4fc7SKonstantin Dimitrov
ts2020_init(struct dvb_frontend * fe)786fef4fc7SKonstantin Dimitrov static int ts2020_init(struct dvb_frontend *fe)
796fef4fc7SKonstantin Dimitrov {
803366cd5dSDavid Howells struct dtv_frontend_properties *c = &fe->dtv_property_cache;
81b858c331SIgor M. Liplianin struct ts2020_priv *priv = fe->tuner_priv;
82abd9025bSAntti Palosaari int i;
83abd9025bSAntti Palosaari u8 u8tmp;
84b858c331SIgor M. Liplianin
85abd9025bSAntti Palosaari if (priv->tuner == TS2020_M88TS2020) {
86f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x42, 0x73);
87f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x05, priv->clk_out_div);
88f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x20, 0x27);
89f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x07, 0x02);
90f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x11, 0xff);
91f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x60, 0xf9);
92f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x08, 0x01);
93f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x00, 0x41);
94abd9025bSAntti Palosaari } else {
95abd9025bSAntti Palosaari static const struct ts2020_reg_val reg_vals[] = {
96abd9025bSAntti Palosaari {0x7d, 0x9d},
97abd9025bSAntti Palosaari {0x7c, 0x9a},
98abd9025bSAntti Palosaari {0x7a, 0x76},
99abd9025bSAntti Palosaari {0x3b, 0x01},
100abd9025bSAntti Palosaari {0x63, 0x88},
101abd9025bSAntti Palosaari {0x61, 0x85},
102abd9025bSAntti Palosaari {0x22, 0x30},
103abd9025bSAntti Palosaari {0x30, 0x40},
104abd9025bSAntti Palosaari {0x20, 0x23},
105abd9025bSAntti Palosaari {0x24, 0x02},
106abd9025bSAntti Palosaari {0x12, 0xa0},
107abd9025bSAntti Palosaari };
108abd9025bSAntti Palosaari
109f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x00, 0x01);
110f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x00, 0x03);
111abd9025bSAntti Palosaari
112abd9025bSAntti Palosaari switch (priv->clk_out) {
113abd9025bSAntti Palosaari case TS2020_CLK_OUT_DISABLED:
114abd9025bSAntti Palosaari u8tmp = 0x60;
115abd9025bSAntti Palosaari break;
116abd9025bSAntti Palosaari case TS2020_CLK_OUT_ENABLED:
117abd9025bSAntti Palosaari u8tmp = 0x70;
118f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x05, priv->clk_out_div);
119abd9025bSAntti Palosaari break;
120abd9025bSAntti Palosaari case TS2020_CLK_OUT_ENABLED_XTALOUT:
121abd9025bSAntti Palosaari u8tmp = 0x6c;
122abd9025bSAntti Palosaari break;
123abd9025bSAntti Palosaari default:
124abd9025bSAntti Palosaari u8tmp = 0x60;
125abd9025bSAntti Palosaari break;
126abd9025bSAntti Palosaari }
127abd9025bSAntti Palosaari
128f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x42, u8tmp);
129abd9025bSAntti Palosaari
130abd9025bSAntti Palosaari if (priv->loop_through)
131abd9025bSAntti Palosaari u8tmp = 0xec;
132abd9025bSAntti Palosaari else
133abd9025bSAntti Palosaari u8tmp = 0x6c;
134abd9025bSAntti Palosaari
135f158cbceSAntti Palosaari regmap_write(priv->regmap, 0x62, u8tmp);
136abd9025bSAntti Palosaari
137abd9025bSAntti Palosaari for (i = 0; i < ARRAY_SIZE(reg_vals); i++)
138f158cbceSAntti Palosaari regmap_write(priv->regmap, reg_vals[i].reg,
139f158cbceSAntti Palosaari reg_vals[i].val);
140abd9025bSAntti Palosaari }
141b858c331SIgor M. Liplianin
1423366cd5dSDavid Howells /* Initialise v5 stats here */
1433366cd5dSDavid Howells c->strength.len = 1;
1443366cd5dSDavid Howells c->strength.stat[0].scale = FE_SCALE_DECIBEL;
1453366cd5dSDavid Howells c->strength.stat[0].uvalue = 0;
1463366cd5dSDavid Howells
147c7275ae1SDavid Howells /* Start statistics polling by invoking the work function */
148c7275ae1SDavid Howells ts2020_stat_work(&priv->stat_work.work);
1496fef4fc7SKonstantin Dimitrov return 0;
1506fef4fc7SKonstantin Dimitrov }
1516fef4fc7SKonstantin Dimitrov
ts2020_tuner_gate_ctrl(struct dvb_frontend * fe,u8 offset)152b858c331SIgor M. Liplianin static int ts2020_tuner_gate_ctrl(struct dvb_frontend *fe, u8 offset)
1536fef4fc7SKonstantin Dimitrov {
154f158cbceSAntti Palosaari struct ts2020_priv *priv = fe->tuner_priv;
155b858c331SIgor M. Liplianin int ret;
156f158cbceSAntti Palosaari ret = regmap_write(priv->regmap, 0x51, 0x1f - offset);
157f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x51, 0x1f);
158f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x50, offset);
159f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x50, 0x00);
160b858c331SIgor M. Liplianin msleep(20);
161b858c331SIgor M. Liplianin return ret;
162b858c331SIgor M. Liplianin }
1636fef4fc7SKonstantin Dimitrov
ts2020_set_tuner_rf(struct dvb_frontend * fe)164b858c331SIgor M. Liplianin static int ts2020_set_tuner_rf(struct dvb_frontend *fe)
165b858c331SIgor M. Liplianin {
166f158cbceSAntti Palosaari struct ts2020_priv *dev = fe->tuner_priv;
167f158cbceSAntti Palosaari int ret;
168f158cbceSAntti Palosaari unsigned int utmp;
1696fef4fc7SKonstantin Dimitrov
170f158cbceSAntti Palosaari ret = regmap_read(dev->regmap, 0x3d, &utmp);
17137d1e62bSYizhuo if (ret)
17237d1e62bSYizhuo return ret;
17337d1e62bSYizhuo
174f158cbceSAntti Palosaari utmp &= 0x7f;
175f158cbceSAntti Palosaari if (utmp < 0x16)
176f158cbceSAntti Palosaari utmp = 0xa1;
177f158cbceSAntti Palosaari else if (utmp == 0x16)
178f158cbceSAntti Palosaari utmp = 0x99;
179b858c331SIgor M. Liplianin else
180f158cbceSAntti Palosaari utmp = 0xf9;
1816fef4fc7SKonstantin Dimitrov
182f158cbceSAntti Palosaari regmap_write(dev->regmap, 0x60, utmp);
183f158cbceSAntti Palosaari ret = ts2020_tuner_gate_ctrl(fe, 0x08);
1846fef4fc7SKonstantin Dimitrov
185f158cbceSAntti Palosaari return ret;
1866fef4fc7SKonstantin Dimitrov }
1876fef4fc7SKonstantin Dimitrov
ts2020_set_params(struct dvb_frontend * fe)1886fef4fc7SKonstantin Dimitrov static int ts2020_set_params(struct dvb_frontend *fe)
1896fef4fc7SKonstantin Dimitrov {
1906fef4fc7SKonstantin Dimitrov struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1919898df64SMalcolm Priestley struct ts2020_priv *priv = fe->tuner_priv;
192b858c331SIgor M. Liplianin int ret;
193f158cbceSAntti Palosaari unsigned int utmp;
194b858c331SIgor M. Liplianin u32 f3db, gdiv28;
195af9d5255SAntti Palosaari u16 u16tmp, value, lpf_coeff;
196af9d5255SAntti Palosaari u8 buf[3], reg10, lpf_mxdiv, mlpf_max, mlpf_min, nlpf;
197af9d5255SAntti Palosaari unsigned int f_ref_khz, f_vco_khz, div_ref, div_out, pll_n;
198af9d5255SAntti Palosaari unsigned int frequency_khz = c->frequency;
1996fef4fc7SKonstantin Dimitrov
200af9d5255SAntti Palosaari /*
201af9d5255SAntti Palosaari * Integer-N PLL synthesizer
202af9d5255SAntti Palosaari * kHz is used for all calculations to keep calculations within 32-bit
203af9d5255SAntti Palosaari */
204af9d5255SAntti Palosaari f_ref_khz = TS2020_XTAL_FREQ;
205af9d5255SAntti Palosaari div_ref = DIV_ROUND_CLOSEST(f_ref_khz, 2000);
206af9d5255SAntti Palosaari
207af9d5255SAntti Palosaari /* select LO output divider */
208af9d5255SAntti Palosaari if (frequency_khz < priv->frequency_div) {
209af9d5255SAntti Palosaari div_out = 4;
210af9d5255SAntti Palosaari reg10 = 0x10;
211af9d5255SAntti Palosaari } else {
212af9d5255SAntti Palosaari div_out = 2;
213af9d5255SAntti Palosaari reg10 = 0x00;
214af9d5255SAntti Palosaari }
215af9d5255SAntti Palosaari
216af9d5255SAntti Palosaari f_vco_khz = frequency_khz * div_out;
217af9d5255SAntti Palosaari pll_n = f_vco_khz * div_ref / f_ref_khz;
218af9d5255SAntti Palosaari pll_n += pll_n % 2;
219af9d5255SAntti Palosaari priv->frequency_khz = pll_n * f_ref_khz / div_ref / div_out;
220af9d5255SAntti Palosaari
221af9d5255SAntti Palosaari pr_debug("frequency=%u offset=%d f_vco_khz=%u pll_n=%u div_ref=%u div_out=%u\n",
222af9d5255SAntti Palosaari priv->frequency_khz, priv->frequency_khz - c->frequency,
223af9d5255SAntti Palosaari f_vco_khz, pll_n, div_ref, div_out);
2246fef4fc7SKonstantin Dimitrov
225abd9025bSAntti Palosaari if (priv->tuner == TS2020_M88TS2020) {
226abd9025bSAntti Palosaari lpf_coeff = 2766;
227af9d5255SAntti Palosaari reg10 |= 0x01;
228f158cbceSAntti Palosaari ret = regmap_write(priv->regmap, 0x10, reg10);
229abd9025bSAntti Palosaari } else {
230abd9025bSAntti Palosaari lpf_coeff = 3200;
231af9d5255SAntti Palosaari reg10 |= 0x0b;
232f158cbceSAntti Palosaari ret = regmap_write(priv->regmap, 0x10, reg10);
233f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x11, 0x40);
234abd9025bSAntti Palosaari }
2356fef4fc7SKonstantin Dimitrov
236af9d5255SAntti Palosaari u16tmp = pll_n - 1024;
237af9d5255SAntti Palosaari buf[0] = (u16tmp >> 8) & 0xff;
238af9d5255SAntti Palosaari buf[1] = (u16tmp >> 0) & 0xff;
239af9d5255SAntti Palosaari buf[2] = div_ref - 8;
2406fef4fc7SKonstantin Dimitrov
241f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x01, buf[0]);
242f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x02, buf[1]);
243f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x03, buf[2]);
244af9d5255SAntti Palosaari
245b858c331SIgor M. Liplianin ret |= ts2020_tuner_gate_ctrl(fe, 0x10);
246b858c331SIgor M. Liplianin if (ret < 0)
247b858c331SIgor M. Liplianin return -ENODEV;
2486fef4fc7SKonstantin Dimitrov
249b858c331SIgor M. Liplianin ret |= ts2020_tuner_gate_ctrl(fe, 0x08);
2506fef4fc7SKonstantin Dimitrov
251b858c331SIgor M. Liplianin /* Tuner RF */
252abd9025bSAntti Palosaari if (priv->tuner == TS2020_M88TS2020)
253b858c331SIgor M. Liplianin ret |= ts2020_set_tuner_rf(fe);
2546fef4fc7SKonstantin Dimitrov
255b858c331SIgor M. Liplianin gdiv28 = (TS2020_XTAL_FREQ / 1000 * 1694 + 500) / 1000;
256f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x04, gdiv28 & 0xff);
257b858c331SIgor M. Liplianin ret |= ts2020_tuner_gate_ctrl(fe, 0x04);
258b858c331SIgor M. Liplianin if (ret < 0)
259b858c331SIgor M. Liplianin return -ENODEV;
2606fef4fc7SKonstantin Dimitrov
261abd9025bSAntti Palosaari if (priv->tuner == TS2020_M88TS2022) {
262f158cbceSAntti Palosaari ret = regmap_write(priv->regmap, 0x25, 0x00);
263f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x27, 0x70);
264f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x41, 0x09);
265f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x08, 0x0b);
266abd9025bSAntti Palosaari if (ret < 0)
267abd9025bSAntti Palosaari return -ENODEV;
268abd9025bSAntti Palosaari }
269abd9025bSAntti Palosaari
270f158cbceSAntti Palosaari regmap_read(priv->regmap, 0x26, &utmp);
271f158cbceSAntti Palosaari value = utmp;
2726fef4fc7SKonstantin Dimitrov
2732ca58f45SAntti Palosaari f3db = (c->bandwidth_hz / 1000 / 2) + 2000;
2742ca58f45SAntti Palosaari f3db += FREQ_OFFSET_LOW_SYM_RATE; /* FIXME: ~always too wide filter */
2752ca58f45SAntti Palosaari f3db = clamp(f3db, 7000U, 40000U);
2766fef4fc7SKonstantin Dimitrov
277b858c331SIgor M. Liplianin gdiv28 = gdiv28 * 207 / (value * 2 + 151);
278b858c331SIgor M. Liplianin mlpf_max = gdiv28 * 135 / 100;
279b858c331SIgor M. Liplianin mlpf_min = gdiv28 * 78 / 100;
2806fef4fc7SKonstantin Dimitrov if (mlpf_max > 63)
2816fef4fc7SKonstantin Dimitrov mlpf_max = 63;
2826fef4fc7SKonstantin Dimitrov
283b858c331SIgor M. Liplianin nlpf = (f3db * gdiv28 * 2 / lpf_coeff /
284b858c331SIgor M. Liplianin (TS2020_XTAL_FREQ / 1000) + 1) / 2;
2856fef4fc7SKonstantin Dimitrov if (nlpf > 23)
2866fef4fc7SKonstantin Dimitrov nlpf = 23;
2876fef4fc7SKonstantin Dimitrov if (nlpf < 1)
2886fef4fc7SKonstantin Dimitrov nlpf = 1;
2896fef4fc7SKonstantin Dimitrov
290b858c331SIgor M. Liplianin lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000)
291b858c331SIgor M. Liplianin * lpf_coeff * 2 / f3db + 1) / 2;
2926fef4fc7SKonstantin Dimitrov
293b858c331SIgor M. Liplianin if (lpf_mxdiv < mlpf_min) {
2946fef4fc7SKonstantin Dimitrov nlpf++;
295b858c331SIgor M. Liplianin lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000)
296b858c331SIgor M. Liplianin * lpf_coeff * 2 / f3db + 1) / 2;
2976fef4fc7SKonstantin Dimitrov }
2986fef4fc7SKonstantin Dimitrov
299b858c331SIgor M. Liplianin if (lpf_mxdiv > mlpf_max)
300b858c331SIgor M. Liplianin lpf_mxdiv = mlpf_max;
3016fef4fc7SKonstantin Dimitrov
302f158cbceSAntti Palosaari ret = regmap_write(priv->regmap, 0x04, lpf_mxdiv);
303f158cbceSAntti Palosaari ret |= regmap_write(priv->regmap, 0x06, nlpf);
3046fef4fc7SKonstantin Dimitrov
305b858c331SIgor M. Liplianin ret |= ts2020_tuner_gate_ctrl(fe, 0x04);
3066fef4fc7SKonstantin Dimitrov
307b858c331SIgor M. Liplianin ret |= ts2020_tuner_gate_ctrl(fe, 0x01);
308b858c331SIgor M. Liplianin
309b858c331SIgor M. Liplianin msleep(80);
310b858c331SIgor M. Liplianin
311b858c331SIgor M. Liplianin return (ret < 0) ? -EINVAL : 0;
3126fef4fc7SKonstantin Dimitrov }
3136fef4fc7SKonstantin Dimitrov
ts2020_get_frequency(struct dvb_frontend * fe,u32 * frequency)314b858c331SIgor M. Liplianin static int ts2020_get_frequency(struct dvb_frontend *fe, u32 *frequency)
3156fef4fc7SKonstantin Dimitrov {
316b858c331SIgor M. Liplianin struct ts2020_priv *priv = fe->tuner_priv;
317abd9025bSAntti Palosaari
318af9d5255SAntti Palosaari *frequency = priv->frequency_khz;
319abd9025bSAntti Palosaari return 0;
320abd9025bSAntti Palosaari }
321abd9025bSAntti Palosaari
ts2020_get_if_frequency(struct dvb_frontend * fe,u32 * frequency)322abd9025bSAntti Palosaari static int ts2020_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
323abd9025bSAntti Palosaari {
324abd9025bSAntti Palosaari *frequency = 0; /* Zero-IF */
3256fef4fc7SKonstantin Dimitrov return 0;
3266fef4fc7SKonstantin Dimitrov }
3276fef4fc7SKonstantin Dimitrov
3280f91c9d6SDavid Howells /*
3290f91c9d6SDavid Howells * Get the tuner gain.
3300f91c9d6SDavid Howells * @fe: The front end for which we're determining the gain
3310f91c9d6SDavid Howells * @v_agc: The voltage of the AGC from the demodulator (0-2600mV)
3320f91c9d6SDavid Howells * @_gain: Where to store the gain (in 0.001dB units)
3330f91c9d6SDavid Howells *
3340f91c9d6SDavid Howells * Returns 0 or a negative error code.
3350f91c9d6SDavid Howells */
ts2020_read_tuner_gain(struct dvb_frontend * fe,unsigned v_agc,__s64 * _gain)3360f91c9d6SDavid Howells static int ts2020_read_tuner_gain(struct dvb_frontend *fe, unsigned v_agc,
3370f91c9d6SDavid Howells __s64 *_gain)
3380f91c9d6SDavid Howells {
3390f91c9d6SDavid Howells struct ts2020_priv *priv = fe->tuner_priv;
3400f91c9d6SDavid Howells unsigned long gain1, gain2, gain3;
3410f91c9d6SDavid Howells unsigned utmp;
3420f91c9d6SDavid Howells int ret;
3430f91c9d6SDavid Howells
3440f91c9d6SDavid Howells /* Read the RF gain */
3450f91c9d6SDavid Howells ret = regmap_read(priv->regmap, 0x3d, &utmp);
3460f91c9d6SDavid Howells if (ret < 0)
3470f91c9d6SDavid Howells return ret;
3480f91c9d6SDavid Howells gain1 = utmp & 0x1f;
3490f91c9d6SDavid Howells
3500f91c9d6SDavid Howells /* Read the baseband gain */
3510f91c9d6SDavid Howells ret = regmap_read(priv->regmap, 0x21, &utmp);
3520f91c9d6SDavid Howells if (ret < 0)
3530f91c9d6SDavid Howells return ret;
3540f91c9d6SDavid Howells gain2 = utmp & 0x1f;
3550f91c9d6SDavid Howells
3560f91c9d6SDavid Howells switch (priv->tuner) {
3570f91c9d6SDavid Howells case TS2020_M88TS2020:
3580f91c9d6SDavid Howells gain1 = clamp_t(long, gain1, 0, 15);
3590f91c9d6SDavid Howells gain2 = clamp_t(long, gain2, 0, 13);
3600f91c9d6SDavid Howells v_agc = clamp_t(long, v_agc, 400, 1100);
3610f91c9d6SDavid Howells
36281742be1SMauro Carvalho Chehab *_gain = -((__s64)gain1 * 2330 +
3630f91c9d6SDavid Howells gain2 * 3500 +
3640f91c9d6SDavid Howells v_agc * 24 / 10 * 10 +
3650f91c9d6SDavid Howells 10000);
3660f91c9d6SDavid Howells /* gain in range -19600 to -116850 in units of 0.001dB */
3670f91c9d6SDavid Howells break;
3680f91c9d6SDavid Howells
3690f91c9d6SDavid Howells case TS2020_M88TS2022:
3700f91c9d6SDavid Howells ret = regmap_read(priv->regmap, 0x66, &utmp);
3710f91c9d6SDavid Howells if (ret < 0)
3720f91c9d6SDavid Howells return ret;
3730f91c9d6SDavid Howells gain3 = (utmp >> 3) & 0x07;
3740f91c9d6SDavid Howells
3750f91c9d6SDavid Howells gain1 = clamp_t(long, gain1, 0, 15);
3760f91c9d6SDavid Howells gain2 = clamp_t(long, gain2, 2, 16);
3770f91c9d6SDavid Howells gain3 = clamp_t(long, gain3, 0, 6);
3780f91c9d6SDavid Howells v_agc = clamp_t(long, v_agc, 600, 1600);
3790f91c9d6SDavid Howells
38081742be1SMauro Carvalho Chehab *_gain = -((__s64)gain1 * 2650 +
3810f91c9d6SDavid Howells gain2 * 3380 +
3820f91c9d6SDavid Howells gain3 * 2850 +
3830f91c9d6SDavid Howells v_agc * 176 / 100 * 10 -
3840f91c9d6SDavid Howells 30000);
3850f91c9d6SDavid Howells /* gain in range -47320 to -158950 in units of 0.001dB */
3860f91c9d6SDavid Howells break;
3870f91c9d6SDavid Howells }
3880f91c9d6SDavid Howells
3890f91c9d6SDavid Howells return 0;
3900f91c9d6SDavid Howells }
3910f91c9d6SDavid Howells
3920f91c9d6SDavid Howells /*
3930f91c9d6SDavid Howells * Get the AGC information from the demodulator and use that to calculate the
3940f91c9d6SDavid Howells * tuner gain.
3950f91c9d6SDavid Howells */
ts2020_get_tuner_gain(struct dvb_frontend * fe,__s64 * _gain)3960f91c9d6SDavid Howells static int ts2020_get_tuner_gain(struct dvb_frontend *fe, __s64 *_gain)
3970f91c9d6SDavid Howells {
3980f91c9d6SDavid Howells struct ts2020_priv *priv = fe->tuner_priv;
3990f91c9d6SDavid Howells int v_agc = 0, ret;
4000f91c9d6SDavid Howells u8 agc_pwm;
4010f91c9d6SDavid Howells
4020f91c9d6SDavid Howells /* Read the AGC PWM rate from the demodulator */
4030f91c9d6SDavid Howells if (priv->get_agc_pwm) {
4040f91c9d6SDavid Howells ret = priv->get_agc_pwm(fe, &agc_pwm);
4050f91c9d6SDavid Howells if (ret < 0)
4060f91c9d6SDavid Howells return ret;
4070f91c9d6SDavid Howells
4080f91c9d6SDavid Howells switch (priv->tuner) {
4090f91c9d6SDavid Howells case TS2020_M88TS2020:
4100f91c9d6SDavid Howells v_agc = (int)agc_pwm * 20 - 1166;
4110f91c9d6SDavid Howells break;
4120f91c9d6SDavid Howells case TS2020_M88TS2022:
4130f91c9d6SDavid Howells v_agc = (int)agc_pwm * 16 - 670;
4140f91c9d6SDavid Howells break;
4150f91c9d6SDavid Howells }
4160f91c9d6SDavid Howells
4170f91c9d6SDavid Howells if (v_agc < 0)
4180f91c9d6SDavid Howells v_agc = 0;
4190f91c9d6SDavid Howells }
4200f91c9d6SDavid Howells
4210f91c9d6SDavid Howells return ts2020_read_tuner_gain(fe, v_agc, _gain);
4220f91c9d6SDavid Howells }
4230f91c9d6SDavid Howells
4240f91c9d6SDavid Howells /*
4253366cd5dSDavid Howells * Gather statistics on a regular basis
4263366cd5dSDavid Howells */
ts2020_stat_work(struct work_struct * work)4273366cd5dSDavid Howells static void ts2020_stat_work(struct work_struct *work)
4283366cd5dSDavid Howells {
4293366cd5dSDavid Howells struct ts2020_priv *priv = container_of(work, struct ts2020_priv,
4303366cd5dSDavid Howells stat_work.work);
4313366cd5dSDavid Howells struct i2c_client *client = priv->client;
4323366cd5dSDavid Howells struct dtv_frontend_properties *c = &priv->fe->dtv_property_cache;
4333366cd5dSDavid Howells int ret;
4343366cd5dSDavid Howells
4353366cd5dSDavid Howells dev_dbg(&client->dev, "\n");
4363366cd5dSDavid Howells
4373366cd5dSDavid Howells ret = ts2020_get_tuner_gain(priv->fe, &c->strength.stat[0].svalue);
4383366cd5dSDavid Howells if (ret < 0)
4393366cd5dSDavid Howells goto err;
4403366cd5dSDavid Howells
4413366cd5dSDavid Howells c->strength.stat[0].scale = FE_SCALE_DECIBEL;
4423366cd5dSDavid Howells
443c7275ae1SDavid Howells if (!priv->dont_poll)
4443366cd5dSDavid Howells schedule_delayed_work(&priv->stat_work, msecs_to_jiffies(2000));
4453366cd5dSDavid Howells return;
4463366cd5dSDavid Howells err:
4473366cd5dSDavid Howells dev_dbg(&client->dev, "failed=%d\n", ret);
4483366cd5dSDavid Howells }
4493366cd5dSDavid Howells
4503366cd5dSDavid Howells /*
4510f91c9d6SDavid Howells * Read TS2020 signal strength in v3 format.
4520f91c9d6SDavid Howells */
ts2020_read_signal_strength(struct dvb_frontend * fe,u16 * _signal_strength)453b858c331SIgor M. Liplianin static int ts2020_read_signal_strength(struct dvb_frontend *fe,
4543366cd5dSDavid Howells u16 *_signal_strength)
4556fef4fc7SKonstantin Dimitrov {
4563366cd5dSDavid Howells struct dtv_frontend_properties *c = &fe->dtv_property_cache;
457c7275ae1SDavid Howells struct ts2020_priv *priv = fe->tuner_priv;
4580f91c9d6SDavid Howells unsigned strength;
4590f91c9d6SDavid Howells __s64 gain;
4606fef4fc7SKonstantin Dimitrov
461c7275ae1SDavid Howells if (priv->dont_poll)
462c7275ae1SDavid Howells ts2020_stat_work(&priv->stat_work.work);
463c7275ae1SDavid Howells
4643366cd5dSDavid Howells if (c->strength.stat[0].scale == FE_SCALE_NOT_AVAILABLE) {
4653366cd5dSDavid Howells *_signal_strength = 0;
4663366cd5dSDavid Howells return 0;
4673366cd5dSDavid Howells }
4683366cd5dSDavid Howells
4693366cd5dSDavid Howells gain = c->strength.stat[0].svalue;
4706fef4fc7SKonstantin Dimitrov
4710f91c9d6SDavid Howells /* Calculate the signal strength based on the total gain of the tuner */
4720f91c9d6SDavid Howells if (gain < -85000)
4730f91c9d6SDavid Howells /* 0%: no signal or weak signal */
4740f91c9d6SDavid Howells strength = 0;
4750f91c9d6SDavid Howells else if (gain < -65000)
4760f91c9d6SDavid Howells /* 0% - 60%: weak signal */
47787b09bd0SMauro Carvalho Chehab strength = 0 + div64_s64((85000 + gain) * 3, 1000);
4780f91c9d6SDavid Howells else if (gain < -45000)
4790f91c9d6SDavid Howells /* 60% - 90%: normal signal */
48087b09bd0SMauro Carvalho Chehab strength = 60 + div64_s64((65000 + gain) * 3, 2000);
4810f91c9d6SDavid Howells else
4820f91c9d6SDavid Howells /* 90% - 99%: strong signal */
48387b09bd0SMauro Carvalho Chehab strength = 90 + div64_s64((45000 + gain), 5000);
4846fef4fc7SKonstantin Dimitrov
4853366cd5dSDavid Howells *_signal_strength = strength * 65535 / 100;
4866fef4fc7SKonstantin Dimitrov return 0;
4876fef4fc7SKonstantin Dimitrov }
4886fef4fc7SKonstantin Dimitrov
48914c4bf3cSJulia Lawall static const struct dvb_tuner_ops ts2020_tuner_ops = {
4906fef4fc7SKonstantin Dimitrov .info = {
491b858c331SIgor M. Liplianin .name = "TS2020",
492a3f90c75SMauro Carvalho Chehab .frequency_min_hz = 950 * MHz,
493a3f90c75SMauro Carvalho Chehab .frequency_max_hz = 2150 * MHz
4946fef4fc7SKonstantin Dimitrov },
4956fef4fc7SKonstantin Dimitrov .init = ts2020_init,
4966fef4fc7SKonstantin Dimitrov .release = ts2020_release,
497b858c331SIgor M. Liplianin .sleep = ts2020_sleep,
4986fef4fc7SKonstantin Dimitrov .set_params = ts2020_set_params,
4996fef4fc7SKonstantin Dimitrov .get_frequency = ts2020_get_frequency,
500abd9025bSAntti Palosaari .get_if_frequency = ts2020_get_if_frequency,
501b858c331SIgor M. Liplianin .get_rf_strength = ts2020_read_signal_strength,
5026fef4fc7SKonstantin Dimitrov };
5036fef4fc7SKonstantin Dimitrov
ts2020_attach(struct dvb_frontend * fe,const struct ts2020_config * config,struct i2c_adapter * i2c)5046fef4fc7SKonstantin Dimitrov struct dvb_frontend *ts2020_attach(struct dvb_frontend *fe,
505b858c331SIgor M. Liplianin const struct ts2020_config *config,
506b858c331SIgor M. Liplianin struct i2c_adapter *i2c)
5076fef4fc7SKonstantin Dimitrov {
508e6ad9ce3SAntti Palosaari struct i2c_client *client;
509e6ad9ce3SAntti Palosaari struct i2c_board_info board_info;
51080868c8eSDavid Howells
51180868c8eSDavid Howells /* This is only used by ts2020_probe() so can be on the stack */
512e6ad9ce3SAntti Palosaari struct ts2020_config pdata;
5136fef4fc7SKonstantin Dimitrov
514e6ad9ce3SAntti Palosaari memcpy(&pdata, config, sizeof(pdata));
515e6ad9ce3SAntti Palosaari pdata.fe = fe;
516e6ad9ce3SAntti Palosaari pdata.attach_in_use = true;
517e6ad9ce3SAntti Palosaari
518e6ad9ce3SAntti Palosaari memset(&board_info, 0, sizeof(board_info));
519c0decac1SMauro Carvalho Chehab strscpy(board_info.type, "ts2020", I2C_NAME_SIZE);
520e6ad9ce3SAntti Palosaari board_info.addr = config->tuner_address;
521e6ad9ce3SAntti Palosaari board_info.platform_data = &pdata;
5222f507ffaSWolfram Sang client = i2c_new_client_device(i2c, &board_info);
5232f507ffaSWolfram Sang if (!i2c_client_has_driver(client))
5246fef4fc7SKonstantin Dimitrov return NULL;
5256fef4fc7SKonstantin Dimitrov
5266fef4fc7SKonstantin Dimitrov return fe;
5276fef4fc7SKonstantin Dimitrov }
528*86495af1SGreg Kroah-Hartman EXPORT_SYMBOL_GPL(ts2020_attach);
5296fef4fc7SKonstantin Dimitrov
530f158cbceSAntti Palosaari /*
531f158cbceSAntti Palosaari * We implement own regmap locking due to legacy DVB attach which uses frontend
532f158cbceSAntti Palosaari * gate control callback to control I2C bus access. We can open / close gate and
533f158cbceSAntti Palosaari * serialize whole open / I2C-operation / close sequence at the same.
534f158cbceSAntti Palosaari */
ts2020_regmap_lock(void * __dev)535f158cbceSAntti Palosaari static void ts2020_regmap_lock(void *__dev)
536f158cbceSAntti Palosaari {
537f158cbceSAntti Palosaari struct ts2020_priv *dev = __dev;
538f158cbceSAntti Palosaari
539f158cbceSAntti Palosaari mutex_lock(&dev->regmap_mutex);
540f158cbceSAntti Palosaari if (dev->fe->ops.i2c_gate_ctrl)
541f158cbceSAntti Palosaari dev->fe->ops.i2c_gate_ctrl(dev->fe, 1);
542f158cbceSAntti Palosaari }
543f158cbceSAntti Palosaari
ts2020_regmap_unlock(void * __dev)544f158cbceSAntti Palosaari static void ts2020_regmap_unlock(void *__dev)
545f158cbceSAntti Palosaari {
546f158cbceSAntti Palosaari struct ts2020_priv *dev = __dev;
547f158cbceSAntti Palosaari
548f158cbceSAntti Palosaari if (dev->fe->ops.i2c_gate_ctrl)
549f158cbceSAntti Palosaari dev->fe->ops.i2c_gate_ctrl(dev->fe, 0);
550f158cbceSAntti Palosaari mutex_unlock(&dev->regmap_mutex);
551f158cbceSAntti Palosaari }
552f158cbceSAntti Palosaari
ts2020_probe(struct i2c_client * client)55349a7233fSUwe Kleine-König static int ts2020_probe(struct i2c_client *client)
554dc245a5fSAntti Palosaari {
555dc245a5fSAntti Palosaari struct ts2020_config *pdata = client->dev.platform_data;
556dc245a5fSAntti Palosaari struct dvb_frontend *fe = pdata->fe;
557dc245a5fSAntti Palosaari struct ts2020_priv *dev;
558dc245a5fSAntti Palosaari int ret;
559dc245a5fSAntti Palosaari u8 u8tmp;
560dc245a5fSAntti Palosaari unsigned int utmp;
561dc245a5fSAntti Palosaari char *chip_str;
562dc245a5fSAntti Palosaari
563dc245a5fSAntti Palosaari dev = kzalloc(sizeof(*dev), GFP_KERNEL);
564dc245a5fSAntti Palosaari if (!dev) {
565dc245a5fSAntti Palosaari ret = -ENOMEM;
566dc245a5fSAntti Palosaari goto err;
567dc245a5fSAntti Palosaari }
568dc245a5fSAntti Palosaari
569f158cbceSAntti Palosaari /* create regmap */
570f158cbceSAntti Palosaari mutex_init(&dev->regmap_mutex);
571fa71ae71SJulia Lawall dev->regmap_config.reg_bits = 8;
572fa71ae71SJulia Lawall dev->regmap_config.val_bits = 8;
573fa71ae71SJulia Lawall dev->regmap_config.lock = ts2020_regmap_lock;
574fa71ae71SJulia Lawall dev->regmap_config.unlock = ts2020_regmap_unlock;
575fa71ae71SJulia Lawall dev->regmap_config.lock_arg = dev;
576f158cbceSAntti Palosaari dev->regmap = regmap_init_i2c(client, &dev->regmap_config);
577f158cbceSAntti Palosaari if (IS_ERR(dev->regmap)) {
578f158cbceSAntti Palosaari ret = PTR_ERR(dev->regmap);
579f158cbceSAntti Palosaari goto err_kfree;
580f158cbceSAntti Palosaari }
581f158cbceSAntti Palosaari
582dc245a5fSAntti Palosaari dev->i2c = client->adapter;
583dc245a5fSAntti Palosaari dev->i2c_address = client->addr;
5840f20baadSDavid Howells dev->loop_through = pdata->loop_through;
585dc245a5fSAntti Palosaari dev->clk_out = pdata->clk_out;
586dc245a5fSAntti Palosaari dev->clk_out_div = pdata->clk_out_div;
587c7275ae1SDavid Howells dev->dont_poll = pdata->dont_poll;
588dc245a5fSAntti Palosaari dev->frequency_div = pdata->frequency_div;
589dc245a5fSAntti Palosaari dev->fe = fe;
5900f91c9d6SDavid Howells dev->get_agc_pwm = pdata->get_agc_pwm;
591dc245a5fSAntti Palosaari fe->tuner_priv = dev;
592e6ad9ce3SAntti Palosaari dev->client = client;
5933366cd5dSDavid Howells INIT_DELAYED_WORK(&dev->stat_work, ts2020_stat_work);
594dc245a5fSAntti Palosaari
595dc245a5fSAntti Palosaari /* check if the tuner is there */
596f158cbceSAntti Palosaari ret = regmap_read(dev->regmap, 0x00, &utmp);
597f158cbceSAntti Palosaari if (ret)
598f158cbceSAntti Palosaari goto err_regmap_exit;
599dc245a5fSAntti Palosaari
600dc245a5fSAntti Palosaari if ((utmp & 0x03) == 0x00) {
601f158cbceSAntti Palosaari ret = regmap_write(dev->regmap, 0x00, 0x01);
602dc245a5fSAntti Palosaari if (ret)
603f158cbceSAntti Palosaari goto err_regmap_exit;
604dc245a5fSAntti Palosaari
605dc245a5fSAntti Palosaari usleep_range(2000, 50000);
606dc245a5fSAntti Palosaari }
607dc245a5fSAntti Palosaari
608f158cbceSAntti Palosaari ret = regmap_write(dev->regmap, 0x00, 0x03);
609dc245a5fSAntti Palosaari if (ret)
610f158cbceSAntti Palosaari goto err_regmap_exit;
611dc245a5fSAntti Palosaari
612dc245a5fSAntti Palosaari usleep_range(2000, 50000);
613dc245a5fSAntti Palosaari
614f158cbceSAntti Palosaari ret = regmap_read(dev->regmap, 0x00, &utmp);
615f158cbceSAntti Palosaari if (ret)
616f158cbceSAntti Palosaari goto err_regmap_exit;
617dc245a5fSAntti Palosaari
618dc245a5fSAntti Palosaari dev_dbg(&client->dev, "chip_id=%02x\n", utmp);
619dc245a5fSAntti Palosaari
620dc245a5fSAntti Palosaari switch (utmp) {
621dc245a5fSAntti Palosaari case 0x01:
622dc245a5fSAntti Palosaari case 0x41:
623dc245a5fSAntti Palosaari case 0x81:
624dc245a5fSAntti Palosaari dev->tuner = TS2020_M88TS2020;
625dc245a5fSAntti Palosaari chip_str = "TS2020";
626dc245a5fSAntti Palosaari if (!dev->frequency_div)
627dc245a5fSAntti Palosaari dev->frequency_div = 1060000;
628dc245a5fSAntti Palosaari break;
629dc245a5fSAntti Palosaari case 0xc3:
630dc245a5fSAntti Palosaari case 0x83:
631dc245a5fSAntti Palosaari dev->tuner = TS2020_M88TS2022;
632dc245a5fSAntti Palosaari chip_str = "TS2022";
633dc245a5fSAntti Palosaari if (!dev->frequency_div)
634dc245a5fSAntti Palosaari dev->frequency_div = 1103000;
635dc245a5fSAntti Palosaari break;
636dc245a5fSAntti Palosaari default:
637dc245a5fSAntti Palosaari ret = -ENODEV;
638f158cbceSAntti Palosaari goto err_regmap_exit;
639dc245a5fSAntti Palosaari }
640dc245a5fSAntti Palosaari
641dc245a5fSAntti Palosaari if (dev->tuner == TS2020_M88TS2022) {
642dc245a5fSAntti Palosaari switch (dev->clk_out) {
643dc245a5fSAntti Palosaari case TS2020_CLK_OUT_DISABLED:
644dc245a5fSAntti Palosaari u8tmp = 0x60;
645dc245a5fSAntti Palosaari break;
646dc245a5fSAntti Palosaari case TS2020_CLK_OUT_ENABLED:
647dc245a5fSAntti Palosaari u8tmp = 0x70;
648f158cbceSAntti Palosaari ret = regmap_write(dev->regmap, 0x05, dev->clk_out_div);
649dc245a5fSAntti Palosaari if (ret)
650f158cbceSAntti Palosaari goto err_regmap_exit;
651dc245a5fSAntti Palosaari break;
652dc245a5fSAntti Palosaari case TS2020_CLK_OUT_ENABLED_XTALOUT:
653dc245a5fSAntti Palosaari u8tmp = 0x6c;
654dc245a5fSAntti Palosaari break;
655dc245a5fSAntti Palosaari default:
656dc245a5fSAntti Palosaari ret = -EINVAL;
657f158cbceSAntti Palosaari goto err_regmap_exit;
658dc245a5fSAntti Palosaari }
659dc245a5fSAntti Palosaari
660f158cbceSAntti Palosaari ret = regmap_write(dev->regmap, 0x42, u8tmp);
661dc245a5fSAntti Palosaari if (ret)
662f158cbceSAntti Palosaari goto err_regmap_exit;
663dc245a5fSAntti Palosaari
664dc245a5fSAntti Palosaari if (dev->loop_through)
665dc245a5fSAntti Palosaari u8tmp = 0xec;
666dc245a5fSAntti Palosaari else
667dc245a5fSAntti Palosaari u8tmp = 0x6c;
668dc245a5fSAntti Palosaari
669f158cbceSAntti Palosaari ret = regmap_write(dev->regmap, 0x62, u8tmp);
670dc245a5fSAntti Palosaari if (ret)
671f158cbceSAntti Palosaari goto err_regmap_exit;
672dc245a5fSAntti Palosaari }
673dc245a5fSAntti Palosaari
674dc245a5fSAntti Palosaari /* sleep */
675f158cbceSAntti Palosaari ret = regmap_write(dev->regmap, 0x00, 0x00);
676dc245a5fSAntti Palosaari if (ret)
677f158cbceSAntti Palosaari goto err_regmap_exit;
678dc245a5fSAntti Palosaari
679dc245a5fSAntti Palosaari dev_info(&client->dev,
680dc245a5fSAntti Palosaari "Montage Technology %s successfully identified\n", chip_str);
681dc245a5fSAntti Palosaari
682dc245a5fSAntti Palosaari memcpy(&fe->ops.tuner_ops, &ts2020_tuner_ops,
683dc245a5fSAntti Palosaari sizeof(struct dvb_tuner_ops));
684e6ad9ce3SAntti Palosaari if (!pdata->attach_in_use)
685dc245a5fSAntti Palosaari fe->ops.tuner_ops.release = NULL;
686dc245a5fSAntti Palosaari
687dc245a5fSAntti Palosaari i2c_set_clientdata(client, dev);
688dc245a5fSAntti Palosaari return 0;
689f158cbceSAntti Palosaari err_regmap_exit:
690f158cbceSAntti Palosaari regmap_exit(dev->regmap);
691f158cbceSAntti Palosaari err_kfree:
692f158cbceSAntti Palosaari kfree(dev);
693dc245a5fSAntti Palosaari err:
694dc245a5fSAntti Palosaari dev_dbg(&client->dev, "failed=%d\n", ret);
695dc245a5fSAntti Palosaari return ret;
696dc245a5fSAntti Palosaari }
697dc245a5fSAntti Palosaari
ts2020_remove(struct i2c_client * client)698ed5c2f5fSUwe Kleine-König static void ts2020_remove(struct i2c_client *client)
699dc245a5fSAntti Palosaari {
700dc245a5fSAntti Palosaari struct ts2020_priv *dev = i2c_get_clientdata(client);
701dc245a5fSAntti Palosaari
702dc245a5fSAntti Palosaari dev_dbg(&client->dev, "\n");
703dc245a5fSAntti Palosaari
70441ff9142SErnst Martin Witte /* stop statistics polling */
70541ff9142SErnst Martin Witte if (!dev->dont_poll)
70641ff9142SErnst Martin Witte cancel_delayed_work_sync(&dev->stat_work);
70741ff9142SErnst Martin Witte
708f158cbceSAntti Palosaari regmap_exit(dev->regmap);
709dc245a5fSAntti Palosaari kfree(dev);
710dc245a5fSAntti Palosaari }
711dc245a5fSAntti Palosaari
712dc245a5fSAntti Palosaari static const struct i2c_device_id ts2020_id_table[] = {
713dc245a5fSAntti Palosaari {"ts2020", 0},
714dc245a5fSAntti Palosaari {"ts2022", 0},
715dc245a5fSAntti Palosaari {}
716dc245a5fSAntti Palosaari };
717dc245a5fSAntti Palosaari MODULE_DEVICE_TABLE(i2c, ts2020_id_table);
718dc245a5fSAntti Palosaari
719dc245a5fSAntti Palosaari static struct i2c_driver ts2020_driver = {
720dc245a5fSAntti Palosaari .driver = {
721dc245a5fSAntti Palosaari .name = "ts2020",
722dc245a5fSAntti Palosaari },
723aaeb31c0SUwe Kleine-König .probe = ts2020_probe,
724dc245a5fSAntti Palosaari .remove = ts2020_remove,
725dc245a5fSAntti Palosaari .id_table = ts2020_id_table,
726dc245a5fSAntti Palosaari };
727dc245a5fSAntti Palosaari
728dc245a5fSAntti Palosaari module_i2c_driver(ts2020_driver);
729dc245a5fSAntti Palosaari
7306fef4fc7SKonstantin Dimitrov MODULE_AUTHOR("Konstantin Dimitrov <kosio.dimitrov@gmail.com>");
7316fef4fc7SKonstantin Dimitrov MODULE_DESCRIPTION("Montage Technology TS2020 - Silicon tuner driver module");
7326fef4fc7SKonstantin Dimitrov MODULE_LICENSE("GPL");
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