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Merge remote-tracking branch 'asoc/fix/dapm' into asoc-linus
[mirror_ubuntu-bionic-kernel.git] / drivers / media / dvb-frontends / rtl2832.c
1 /*
2 * Realtek RTL2832 DVB-T demodulator driver
3 *
4 * Copyright (C) 2012 Thomas Mair <thomas.mair86@gmail.com>
5 * Copyright (C) 2012-2014 Antti Palosaari <crope@iki.fi>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 */
21
22 #include "rtl2832_priv.h"
23
24 #define REG_MASK(b) (BIT(b + 1) - 1)
25
26 static const struct rtl2832_reg_entry registers[] = {
27 [DVBT_SOFT_RST] = {0x101, 2, 2},
28 [DVBT_IIC_REPEAT] = {0x101, 3, 3},
29 [DVBT_TR_WAIT_MIN_8K] = {0x188, 11, 2},
30 [DVBT_RSD_BER_FAIL_VAL] = {0x18f, 15, 0},
31 [DVBT_EN_BK_TRK] = {0x1a6, 7, 7},
32 [DVBT_AD_EN_REG] = {0x008, 7, 7},
33 [DVBT_AD_EN_REG1] = {0x008, 6, 6},
34 [DVBT_EN_BBIN] = {0x1b1, 0, 0},
35 [DVBT_MGD_THD0] = {0x195, 7, 0},
36 [DVBT_MGD_THD1] = {0x196, 7, 0},
37 [DVBT_MGD_THD2] = {0x197, 7, 0},
38 [DVBT_MGD_THD3] = {0x198, 7, 0},
39 [DVBT_MGD_THD4] = {0x199, 7, 0},
40 [DVBT_MGD_THD5] = {0x19a, 7, 0},
41 [DVBT_MGD_THD6] = {0x19b, 7, 0},
42 [DVBT_MGD_THD7] = {0x19c, 7, 0},
43 [DVBT_EN_CACQ_NOTCH] = {0x161, 4, 4},
44 [DVBT_AD_AV_REF] = {0x009, 6, 0},
45 [DVBT_REG_PI] = {0x00a, 2, 0},
46 [DVBT_PIP_ON] = {0x021, 3, 3},
47 [DVBT_SCALE1_B92] = {0x292, 7, 0},
48 [DVBT_SCALE1_B93] = {0x293, 7, 0},
49 [DVBT_SCALE1_BA7] = {0x2a7, 7, 0},
50 [DVBT_SCALE1_BA9] = {0x2a9, 7, 0},
51 [DVBT_SCALE1_BAA] = {0x2aa, 7, 0},
52 [DVBT_SCALE1_BAB] = {0x2ab, 7, 0},
53 [DVBT_SCALE1_BAC] = {0x2ac, 7, 0},
54 [DVBT_SCALE1_BB0] = {0x2b0, 7, 0},
55 [DVBT_SCALE1_BB1] = {0x2b1, 7, 0},
56 [DVBT_KB_P1] = {0x164, 3, 1},
57 [DVBT_KB_P2] = {0x164, 6, 4},
58 [DVBT_KB_P3] = {0x165, 2, 0},
59 [DVBT_OPT_ADC_IQ] = {0x006, 5, 4},
60 [DVBT_AD_AVI] = {0x009, 1, 0},
61 [DVBT_AD_AVQ] = {0x009, 3, 2},
62 [DVBT_K1_CR_STEP12] = {0x2ad, 9, 4},
63 [DVBT_TRK_KS_P2] = {0x16f, 2, 0},
64 [DVBT_TRK_KS_I2] = {0x170, 5, 3},
65 [DVBT_TR_THD_SET2] = {0x172, 3, 0},
66 [DVBT_TRK_KC_P2] = {0x173, 5, 3},
67 [DVBT_TRK_KC_I2] = {0x175, 2, 0},
68 [DVBT_CR_THD_SET2] = {0x176, 7, 6},
69 [DVBT_PSET_IFFREQ] = {0x119, 21, 0},
70 [DVBT_SPEC_INV] = {0x115, 0, 0},
71 [DVBT_RSAMP_RATIO] = {0x19f, 27, 2},
72 [DVBT_CFREQ_OFF_RATIO] = {0x19d, 23, 4},
73 [DVBT_FSM_STAGE] = {0x351, 6, 3},
74 [DVBT_RX_CONSTEL] = {0x33c, 3, 2},
75 [DVBT_RX_HIER] = {0x33c, 6, 4},
76 [DVBT_RX_C_RATE_LP] = {0x33d, 2, 0},
77 [DVBT_RX_C_RATE_HP] = {0x33d, 5, 3},
78 [DVBT_GI_IDX] = {0x351, 1, 0},
79 [DVBT_FFT_MODE_IDX] = {0x351, 2, 2},
80 [DVBT_RSD_BER_EST] = {0x34e, 15, 0},
81 [DVBT_CE_EST_EVM] = {0x40c, 15, 0},
82 [DVBT_RF_AGC_VAL] = {0x35b, 13, 0},
83 [DVBT_IF_AGC_VAL] = {0x359, 13, 0},
84 [DVBT_DAGC_VAL] = {0x305, 7, 0},
85 [DVBT_SFREQ_OFF] = {0x318, 13, 0},
86 [DVBT_CFREQ_OFF] = {0x35f, 17, 0},
87 [DVBT_POLAR_RF_AGC] = {0x00e, 1, 1},
88 [DVBT_POLAR_IF_AGC] = {0x00e, 0, 0},
89 [DVBT_AAGC_HOLD] = {0x104, 5, 5},
90 [DVBT_EN_RF_AGC] = {0x104, 6, 6},
91 [DVBT_EN_IF_AGC] = {0x104, 7, 7},
92 [DVBT_IF_AGC_MIN] = {0x108, 7, 0},
93 [DVBT_IF_AGC_MAX] = {0x109, 7, 0},
94 [DVBT_RF_AGC_MIN] = {0x10a, 7, 0},
95 [DVBT_RF_AGC_MAX] = {0x10b, 7, 0},
96 [DVBT_IF_AGC_MAN] = {0x10c, 6, 6},
97 [DVBT_IF_AGC_MAN_VAL] = {0x10c, 13, 0},
98 [DVBT_RF_AGC_MAN] = {0x10e, 6, 6},
99 [DVBT_RF_AGC_MAN_VAL] = {0x10e, 13, 0},
100 [DVBT_DAGC_TRG_VAL] = {0x112, 7, 0},
101 [DVBT_AGC_TARG_VAL_0] = {0x102, 0, 0},
102 [DVBT_AGC_TARG_VAL_8_1] = {0x103, 7, 0},
103 [DVBT_AAGC_LOOP_GAIN] = {0x1c7, 5, 1},
104 [DVBT_LOOP_GAIN2_3_0] = {0x104, 4, 1},
105 [DVBT_LOOP_GAIN2_4] = {0x105, 7, 7},
106 [DVBT_LOOP_GAIN3] = {0x1c8, 4, 0},
107 [DVBT_VTOP1] = {0x106, 5, 0},
108 [DVBT_VTOP2] = {0x1c9, 5, 0},
109 [DVBT_VTOP3] = {0x1ca, 5, 0},
110 [DVBT_KRF1] = {0x1cb, 7, 0},
111 [DVBT_KRF2] = {0x107, 7, 0},
112 [DVBT_KRF3] = {0x1cd, 7, 0},
113 [DVBT_KRF4] = {0x1ce, 7, 0},
114 [DVBT_EN_GI_PGA] = {0x1e5, 0, 0},
115 [DVBT_THD_LOCK_UP] = {0x1d9, 8, 0},
116 [DVBT_THD_LOCK_DW] = {0x1db, 8, 0},
117 [DVBT_THD_UP1] = {0x1dd, 7, 0},
118 [DVBT_THD_DW1] = {0x1de, 7, 0},
119 [DVBT_INTER_CNT_LEN] = {0x1d8, 3, 0},
120 [DVBT_GI_PGA_STATE] = {0x1e6, 3, 3},
121 [DVBT_EN_AGC_PGA] = {0x1d7, 0, 0},
122 [DVBT_CKOUTPAR] = {0x17b, 5, 5},
123 [DVBT_CKOUT_PWR] = {0x17b, 6, 6},
124 [DVBT_SYNC_DUR] = {0x17b, 7, 7},
125 [DVBT_ERR_DUR] = {0x17c, 0, 0},
126 [DVBT_SYNC_LVL] = {0x17c, 1, 1},
127 [DVBT_ERR_LVL] = {0x17c, 2, 2},
128 [DVBT_VAL_LVL] = {0x17c, 3, 3},
129 [DVBT_SERIAL] = {0x17c, 4, 4},
130 [DVBT_SER_LSB] = {0x17c, 5, 5},
131 [DVBT_CDIV_PH0] = {0x17d, 3, 0},
132 [DVBT_CDIV_PH1] = {0x17d, 7, 4},
133 [DVBT_MPEG_IO_OPT_2_2] = {0x006, 7, 7},
134 [DVBT_MPEG_IO_OPT_1_0] = {0x007, 7, 6},
135 [DVBT_CKOUTPAR_PIP] = {0x0b7, 4, 4},
136 [DVBT_CKOUT_PWR_PIP] = {0x0b7, 3, 3},
137 [DVBT_SYNC_LVL_PIP] = {0x0b7, 2, 2},
138 [DVBT_ERR_LVL_PIP] = {0x0b7, 1, 1},
139 [DVBT_VAL_LVL_PIP] = {0x0b7, 0, 0},
140 [DVBT_CKOUTPAR_PID] = {0x0b9, 4, 4},
141 [DVBT_CKOUT_PWR_PID] = {0x0b9, 3, 3},
142 [DVBT_SYNC_LVL_PID] = {0x0b9, 2, 2},
143 [DVBT_ERR_LVL_PID] = {0x0b9, 1, 1},
144 [DVBT_VAL_LVL_PID] = {0x0b9, 0, 0},
145 [DVBT_SM_PASS] = {0x193, 11, 0},
146 [DVBT_AD7_SETTING] = {0x011, 15, 0},
147 [DVBT_RSSI_R] = {0x301, 6, 0},
148 [DVBT_ACI_DET_IND] = {0x312, 0, 0},
149 [DVBT_REG_MON] = {0x00d, 1, 0},
150 [DVBT_REG_MONSEL] = {0x00d, 2, 2},
151 [DVBT_REG_GPE] = {0x00d, 7, 7},
152 [DVBT_REG_GPO] = {0x010, 0, 0},
153 [DVBT_REG_4MSEL] = {0x013, 0, 0},
154 };
155
156 static int rtl2832_rd_demod_reg(struct rtl2832_dev *dev, int reg, u32 *val)
157 {
158 struct i2c_client *client = dev->client;
159 int ret, i;
160 u16 reg_start_addr;
161 u8 msb, lsb, reading[4], len;
162 u32 reading_tmp, mask;
163
164 reg_start_addr = registers[reg].start_address;
165 msb = registers[reg].msb;
166 lsb = registers[reg].lsb;
167 len = (msb >> 3) + 1;
168 mask = REG_MASK(msb - lsb);
169
170 ret = regmap_bulk_read(dev->regmap, reg_start_addr, reading, len);
171 if (ret)
172 goto err;
173
174 reading_tmp = 0;
175 for (i = 0; i < len; i++)
176 reading_tmp |= reading[i] << ((len - 1 - i) * 8);
177
178 *val = (reading_tmp >> lsb) & mask;
179
180 return 0;
181 err:
182 dev_dbg(&client->dev, "failed=%d\n", ret);
183 return ret;
184 }
185
186 static int rtl2832_wr_demod_reg(struct rtl2832_dev *dev, int reg, u32 val)
187 {
188 struct i2c_client *client = dev->client;
189 int ret, i;
190 u16 reg_start_addr;
191 u8 msb, lsb, reading[4], writing[4], len;
192 u32 reading_tmp, writing_tmp, mask;
193
194 reg_start_addr = registers[reg].start_address;
195 msb = registers[reg].msb;
196 lsb = registers[reg].lsb;
197 len = (msb >> 3) + 1;
198 mask = REG_MASK(msb - lsb);
199
200 ret = regmap_bulk_read(dev->regmap, reg_start_addr, reading, len);
201 if (ret)
202 goto err;
203
204 reading_tmp = 0;
205 for (i = 0; i < len; i++)
206 reading_tmp |= reading[i] << ((len - 1 - i) * 8);
207
208 writing_tmp = reading_tmp & ~(mask << lsb);
209 writing_tmp |= ((val & mask) << lsb);
210
211 for (i = 0; i < len; i++)
212 writing[i] = (writing_tmp >> ((len - 1 - i) * 8)) & 0xff;
213
214 ret = regmap_bulk_write(dev->regmap, reg_start_addr, writing, len);
215 if (ret)
216 goto err;
217
218 return 0;
219 err:
220 dev_dbg(&client->dev, "failed=%d\n", ret);
221 return ret;
222 }
223
224 static int rtl2832_set_if(struct dvb_frontend *fe, u32 if_freq)
225 {
226 struct rtl2832_dev *dev = fe->demodulator_priv;
227 struct i2c_client *client = dev->client;
228 int ret;
229 u64 pset_iffreq;
230 u8 en_bbin = (if_freq == 0 ? 0x1 : 0x0);
231
232 /*
233 * PSET_IFFREQ = - floor((IfFreqHz % CrystalFreqHz) * pow(2, 22)
234 * / CrystalFreqHz)
235 */
236 pset_iffreq = if_freq % dev->pdata->clk;
237 pset_iffreq *= 0x400000;
238 pset_iffreq = div_u64(pset_iffreq, dev->pdata->clk);
239 pset_iffreq = -pset_iffreq;
240 pset_iffreq = pset_iffreq & 0x3fffff;
241 dev_dbg(&client->dev, "if_frequency=%d pset_iffreq=%08x\n",
242 if_freq, (unsigned)pset_iffreq);
243
244 ret = rtl2832_wr_demod_reg(dev, DVBT_EN_BBIN, en_bbin);
245 if (ret)
246 goto err;
247
248 ret = rtl2832_wr_demod_reg(dev, DVBT_PSET_IFFREQ, pset_iffreq);
249 if (ret)
250 goto err;
251
252 return 0;
253 err:
254 dev_dbg(&client->dev, "failed=%d\n", ret);
255 return ret;
256 }
257
258 static int rtl2832_init(struct dvb_frontend *fe)
259 {
260 struct rtl2832_dev *dev = fe->demodulator_priv;
261 struct i2c_client *client = dev->client;
262 struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
263 const struct rtl2832_reg_value *init;
264 int i, ret, len;
265 /* initialization values for the demodulator registers */
266 struct rtl2832_reg_value rtl2832_initial_regs[] = {
267 {DVBT_AD_EN_REG, 0x1},
268 {DVBT_AD_EN_REG1, 0x1},
269 {DVBT_RSD_BER_FAIL_VAL, 0x2800},
270 {DVBT_MGD_THD0, 0x10},
271 {DVBT_MGD_THD1, 0x20},
272 {DVBT_MGD_THD2, 0x20},
273 {DVBT_MGD_THD3, 0x40},
274 {DVBT_MGD_THD4, 0x22},
275 {DVBT_MGD_THD5, 0x32},
276 {DVBT_MGD_THD6, 0x37},
277 {DVBT_MGD_THD7, 0x39},
278 {DVBT_EN_BK_TRK, 0x0},
279 {DVBT_EN_CACQ_NOTCH, 0x0},
280 {DVBT_AD_AV_REF, 0x2a},
281 {DVBT_REG_PI, 0x6},
282 {DVBT_PIP_ON, 0x0},
283 {DVBT_CDIV_PH0, 0x8},
284 {DVBT_CDIV_PH1, 0x8},
285 {DVBT_SCALE1_B92, 0x4},
286 {DVBT_SCALE1_B93, 0xb0},
287 {DVBT_SCALE1_BA7, 0x78},
288 {DVBT_SCALE1_BA9, 0x28},
289 {DVBT_SCALE1_BAA, 0x59},
290 {DVBT_SCALE1_BAB, 0x83},
291 {DVBT_SCALE1_BAC, 0xd4},
292 {DVBT_SCALE1_BB0, 0x65},
293 {DVBT_SCALE1_BB1, 0x43},
294 {DVBT_KB_P1, 0x1},
295 {DVBT_KB_P2, 0x4},
296 {DVBT_KB_P3, 0x7},
297 {DVBT_K1_CR_STEP12, 0xa},
298 {DVBT_REG_GPE, 0x1},
299 {DVBT_SERIAL, 0x0},
300 {DVBT_CDIV_PH0, 0x9},
301 {DVBT_CDIV_PH1, 0x9},
302 {DVBT_MPEG_IO_OPT_2_2, 0x0},
303 {DVBT_MPEG_IO_OPT_1_0, 0x0},
304 {DVBT_TRK_KS_P2, 0x4},
305 {DVBT_TRK_KS_I2, 0x7},
306 {DVBT_TR_THD_SET2, 0x6},
307 {DVBT_TRK_KC_I2, 0x5},
308 {DVBT_CR_THD_SET2, 0x1},
309 };
310
311 dev_dbg(&client->dev, "\n");
312
313 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0);
314 if (ret)
315 goto err;
316
317 for (i = 0; i < ARRAY_SIZE(rtl2832_initial_regs); i++) {
318 ret = rtl2832_wr_demod_reg(dev, rtl2832_initial_regs[i].reg,
319 rtl2832_initial_regs[i].value);
320 if (ret)
321 goto err;
322 }
323
324 /* load tuner specific settings */
325 dev_dbg(&client->dev, "load settings for tuner=%02x\n",
326 dev->pdata->tuner);
327 switch (dev->pdata->tuner) {
328 case RTL2832_TUNER_FC2580:
329 len = ARRAY_SIZE(rtl2832_tuner_init_fc2580);
330 init = rtl2832_tuner_init_fc2580;
331 break;
332 case RTL2832_TUNER_FC0012:
333 case RTL2832_TUNER_FC0013:
334 len = ARRAY_SIZE(rtl2832_tuner_init_fc0012);
335 init = rtl2832_tuner_init_fc0012;
336 break;
337 case RTL2832_TUNER_TUA9001:
338 len = ARRAY_SIZE(rtl2832_tuner_init_tua9001);
339 init = rtl2832_tuner_init_tua9001;
340 break;
341 case RTL2832_TUNER_E4000:
342 len = ARRAY_SIZE(rtl2832_tuner_init_e4000);
343 init = rtl2832_tuner_init_e4000;
344 break;
345 case RTL2832_TUNER_R820T:
346 case RTL2832_TUNER_R828D:
347 len = ARRAY_SIZE(rtl2832_tuner_init_r820t);
348 init = rtl2832_tuner_init_r820t;
349 break;
350 case RTL2832_TUNER_SI2157:
351 len = ARRAY_SIZE(rtl2832_tuner_init_si2157);
352 init = rtl2832_tuner_init_si2157;
353 break;
354 default:
355 ret = -EINVAL;
356 goto err;
357 }
358
359 for (i = 0; i < len; i++) {
360 ret = rtl2832_wr_demod_reg(dev, init[i].reg, init[i].value);
361 if (ret)
362 goto err;
363 }
364
365 /* init stats here in order signal app which stats are supported */
366 c->strength.len = 1;
367 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
368 c->cnr.len = 1;
369 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
370 c->post_bit_error.len = 1;
371 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
372 c->post_bit_count.len = 1;
373 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
374 dev->sleeping = false;
375
376 return 0;
377 err:
378 dev_dbg(&client->dev, "failed=%d\n", ret);
379 return ret;
380 }
381
382 static int rtl2832_sleep(struct dvb_frontend *fe)
383 {
384 struct rtl2832_dev *dev = fe->demodulator_priv;
385 struct i2c_client *client = dev->client;
386 int ret;
387
388 dev_dbg(&client->dev, "\n");
389
390 dev->sleeping = true;
391 dev->fe_status = 0;
392
393 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1);
394 if (ret)
395 goto err;
396
397 return 0;
398 err:
399 dev_dbg(&client->dev, "failed=%d\n", ret);
400 return ret;
401 }
402
403 static int rtl2832_get_tune_settings(struct dvb_frontend *fe,
404 struct dvb_frontend_tune_settings *s)
405 {
406 struct rtl2832_dev *dev = fe->demodulator_priv;
407 struct i2c_client *client = dev->client;
408
409 dev_dbg(&client->dev, "\n");
410 s->min_delay_ms = 1000;
411 s->step_size = fe->ops.info.frequency_stepsize * 2;
412 s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
413 return 0;
414 }
415
416 static int rtl2832_set_frontend(struct dvb_frontend *fe)
417 {
418 struct rtl2832_dev *dev = fe->demodulator_priv;
419 struct i2c_client *client = dev->client;
420 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
421 int ret, i, j;
422 u64 bw_mode, num, num2;
423 u32 resamp_ratio, cfreq_off_ratio;
424 static u8 bw_params[3][32] = {
425 /* 6 MHz bandwidth */
426 {
427 0xf5, 0xff, 0x15, 0x38, 0x5d, 0x6d, 0x52, 0x07, 0xfa, 0x2f,
428 0x53, 0xf5, 0x3f, 0xca, 0x0b, 0x91, 0xea, 0x30, 0x63, 0xb2,
429 0x13, 0xda, 0x0b, 0xc4, 0x18, 0x7e, 0x16, 0x66, 0x08, 0x67,
430 0x19, 0xe0,
431 },
432
433 /* 7 MHz bandwidth */
434 {
435 0xe7, 0xcc, 0xb5, 0xba, 0xe8, 0x2f, 0x67, 0x61, 0x00, 0xaf,
436 0x86, 0xf2, 0xbf, 0x59, 0x04, 0x11, 0xb6, 0x33, 0xa4, 0x30,
437 0x15, 0x10, 0x0a, 0x42, 0x18, 0xf8, 0x17, 0xd9, 0x07, 0x22,
438 0x19, 0x10,
439 },
440
441 /* 8 MHz bandwidth */
442 {
443 0x09, 0xf6, 0xd2, 0xa7, 0x9a, 0xc9, 0x27, 0x77, 0x06, 0xbf,
444 0xec, 0xf4, 0x4f, 0x0b, 0xfc, 0x01, 0x63, 0x35, 0x54, 0xa7,
445 0x16, 0x66, 0x08, 0xb4, 0x19, 0x6e, 0x19, 0x65, 0x05, 0xc8,
446 0x19, 0xe0,
447 },
448 };
449
450 dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n",
451 c->frequency, c->bandwidth_hz, c->inversion);
452
453 /* program tuner */
454 if (fe->ops.tuner_ops.set_params)
455 fe->ops.tuner_ops.set_params(fe);
456
457 /* If the frontend has get_if_frequency(), use it */
458 if (fe->ops.tuner_ops.get_if_frequency) {
459 u32 if_freq;
460
461 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
462 if (ret)
463 goto err;
464
465 ret = rtl2832_set_if(fe, if_freq);
466 if (ret)
467 goto err;
468 }
469
470 switch (c->bandwidth_hz) {
471 case 6000000:
472 i = 0;
473 bw_mode = 48000000;
474 break;
475 case 7000000:
476 i = 1;
477 bw_mode = 56000000;
478 break;
479 case 8000000:
480 i = 2;
481 bw_mode = 64000000;
482 break;
483 default:
484 dev_err(&client->dev, "invalid bandwidth_hz %u\n",
485 c->bandwidth_hz);
486 ret = -EINVAL;
487 goto err;
488 }
489
490 for (j = 0; j < sizeof(bw_params[0]); j++) {
491 ret = regmap_bulk_write(dev->regmap,
492 0x11c + j, &bw_params[i][j], 1);
493 if (ret)
494 goto err;
495 }
496
497 /* calculate and set resample ratio
498 * RSAMP_RATIO = floor(CrystalFreqHz * 7 * pow(2, 22)
499 * / ConstWithBandwidthMode)
500 */
501 num = dev->pdata->clk * 7;
502 num *= 0x400000;
503 num = div_u64(num, bw_mode);
504 resamp_ratio = num & 0x3ffffff;
505 ret = rtl2832_wr_demod_reg(dev, DVBT_RSAMP_RATIO, resamp_ratio);
506 if (ret)
507 goto err;
508
509 /* calculate and set cfreq off ratio
510 * CFREQ_OFF_RATIO = - floor(ConstWithBandwidthMode * pow(2, 20)
511 * / (CrystalFreqHz * 7))
512 */
513 num = bw_mode << 20;
514 num2 = dev->pdata->clk * 7;
515 num = div_u64(num, num2);
516 num = -num;
517 cfreq_off_ratio = num & 0xfffff;
518 ret = rtl2832_wr_demod_reg(dev, DVBT_CFREQ_OFF_RATIO, cfreq_off_ratio);
519 if (ret)
520 goto err;
521
522 /* soft reset */
523 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1);
524 if (ret)
525 goto err;
526
527 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0);
528 if (ret)
529 goto err;
530
531 return 0;
532 err:
533 dev_dbg(&client->dev, "failed=%d\n", ret);
534 return ret;
535 }
536
537 static int rtl2832_get_frontend(struct dvb_frontend *fe,
538 struct dtv_frontend_properties *c)
539 {
540 struct rtl2832_dev *dev = fe->demodulator_priv;
541 struct i2c_client *client = dev->client;
542 int ret;
543 u8 buf[3];
544
545 if (dev->sleeping)
546 return 0;
547
548 ret = regmap_bulk_read(dev->regmap, 0x33c, buf, 2);
549 if (ret)
550 goto err;
551
552 ret = regmap_bulk_read(dev->regmap, 0x351, &buf[2], 1);
553 if (ret)
554 goto err;
555
556 dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf);
557
558 switch ((buf[0] >> 2) & 3) {
559 case 0:
560 c->modulation = QPSK;
561 break;
562 case 1:
563 c->modulation = QAM_16;
564 break;
565 case 2:
566 c->modulation = QAM_64;
567 break;
568 }
569
570 switch ((buf[2] >> 2) & 1) {
571 case 0:
572 c->transmission_mode = TRANSMISSION_MODE_2K;
573 break;
574 case 1:
575 c->transmission_mode = TRANSMISSION_MODE_8K;
576 }
577
578 switch ((buf[2] >> 0) & 3) {
579 case 0:
580 c->guard_interval = GUARD_INTERVAL_1_32;
581 break;
582 case 1:
583 c->guard_interval = GUARD_INTERVAL_1_16;
584 break;
585 case 2:
586 c->guard_interval = GUARD_INTERVAL_1_8;
587 break;
588 case 3:
589 c->guard_interval = GUARD_INTERVAL_1_4;
590 break;
591 }
592
593 switch ((buf[0] >> 4) & 7) {
594 case 0:
595 c->hierarchy = HIERARCHY_NONE;
596 break;
597 case 1:
598 c->hierarchy = HIERARCHY_1;
599 break;
600 case 2:
601 c->hierarchy = HIERARCHY_2;
602 break;
603 case 3:
604 c->hierarchy = HIERARCHY_4;
605 break;
606 }
607
608 switch ((buf[1] >> 3) & 7) {
609 case 0:
610 c->code_rate_HP = FEC_1_2;
611 break;
612 case 1:
613 c->code_rate_HP = FEC_2_3;
614 break;
615 case 2:
616 c->code_rate_HP = FEC_3_4;
617 break;
618 case 3:
619 c->code_rate_HP = FEC_5_6;
620 break;
621 case 4:
622 c->code_rate_HP = FEC_7_8;
623 break;
624 }
625
626 switch ((buf[1] >> 0) & 7) {
627 case 0:
628 c->code_rate_LP = FEC_1_2;
629 break;
630 case 1:
631 c->code_rate_LP = FEC_2_3;
632 break;
633 case 2:
634 c->code_rate_LP = FEC_3_4;
635 break;
636 case 3:
637 c->code_rate_LP = FEC_5_6;
638 break;
639 case 4:
640 c->code_rate_LP = FEC_7_8;
641 break;
642 }
643
644 return 0;
645 err:
646 dev_dbg(&client->dev, "failed=%d\n", ret);
647 return ret;
648 }
649
650 static int rtl2832_read_status(struct dvb_frontend *fe, enum fe_status *status)
651 {
652 struct rtl2832_dev *dev = fe->demodulator_priv;
653 struct i2c_client *client = dev->client;
654 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
655 int ret;
656 u32 uninitialized_var(tmp);
657 u8 u8tmp, buf[2];
658 u16 u16tmp;
659
660 dev_dbg(&client->dev, "\n");
661
662 *status = 0;
663 if (dev->sleeping)
664 return 0;
665
666 ret = rtl2832_rd_demod_reg(dev, DVBT_FSM_STAGE, &tmp);
667 if (ret)
668 goto err;
669
670 if (tmp == 11) {
671 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
672 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
673 } else if (tmp == 10) {
674 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
675 FE_HAS_VITERBI;
676 }
677
678 dev->fe_status = *status;
679
680 /* signal strength */
681 if (dev->fe_status & FE_HAS_SIGNAL) {
682 /* read digital AGC */
683 ret = regmap_bulk_read(dev->regmap, 0x305, &u8tmp, 1);
684 if (ret)
685 goto err;
686
687 dev_dbg(&client->dev, "digital agc=%02x", u8tmp);
688
689 u8tmp = ~u8tmp;
690 u16tmp = u8tmp << 8 | u8tmp << 0;
691
692 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
693 c->strength.stat[0].uvalue = u16tmp;
694 } else {
695 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
696 }
697
698 /* CNR */
699 if (dev->fe_status & FE_HAS_VITERBI) {
700 unsigned hierarchy, constellation;
701 #define CONSTELLATION_NUM 3
702 #define HIERARCHY_NUM 4
703 static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = {
704 {85387325, 85387325, 85387325, 85387325},
705 {86676178, 86676178, 87167949, 87795660},
706 {87659938, 87659938, 87885178, 88241743},
707 };
708
709 ret = regmap_bulk_read(dev->regmap, 0x33c, &u8tmp, 1);
710 if (ret)
711 goto err;
712
713 constellation = (u8tmp >> 2) & 0x03; /* [3:2] */
714 if (constellation > CONSTELLATION_NUM - 1)
715 goto err;
716
717 hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */
718 if (hierarchy > HIERARCHY_NUM - 1)
719 goto err;
720
721 ret = regmap_bulk_read(dev->regmap, 0x40c, buf, 2);
722 if (ret)
723 goto err;
724
725 u16tmp = buf[0] << 8 | buf[1] << 0;
726 if (u16tmp)
727 tmp = (constant[constellation][hierarchy] -
728 intlog10(u16tmp)) / ((1 << 24) / 10000);
729 else
730 tmp = 0;
731
732 dev_dbg(&client->dev, "cnr raw=%u\n", u16tmp);
733
734 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
735 c->cnr.stat[0].svalue = tmp;
736 } else {
737 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
738 }
739
740 /* BER */
741 if (dev->fe_status & FE_HAS_LOCK) {
742 ret = regmap_bulk_read(dev->regmap, 0x34e, buf, 2);
743 if (ret)
744 goto err;
745
746 u16tmp = buf[0] << 8 | buf[1] << 0;
747 dev->post_bit_error += u16tmp;
748 dev->post_bit_count += 1000000;
749
750 dev_dbg(&client->dev, "ber errors=%u total=1000000\n", u16tmp);
751
752 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
753 c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
754 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
755 c->post_bit_count.stat[0].uvalue = dev->post_bit_count;
756 } else {
757 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
758 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
759 }
760
761 return 0;
762 err:
763 dev_dbg(&client->dev, "failed=%d\n", ret);
764 return ret;
765 }
766
767 static int rtl2832_read_snr(struct dvb_frontend *fe, u16 *snr)
768 {
769 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
770
771 /* report SNR in resolution of 0.1 dB */
772 if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
773 *snr = div_s64(c->cnr.stat[0].svalue, 100);
774 else
775 *snr = 0;
776
777 return 0;
778 }
779
780 static int rtl2832_read_ber(struct dvb_frontend *fe, u32 *ber)
781 {
782 struct rtl2832_dev *dev = fe->demodulator_priv;
783
784 *ber = (dev->post_bit_error - dev->post_bit_error_prev);
785 dev->post_bit_error_prev = dev->post_bit_error;
786
787 return 0;
788 }
789
790 /*
791 * I2C gate/mux/repeater logic
792 * There is delay mechanism to avoid unneeded I2C gate open / close. Gate close
793 * is delayed here a little bit in order to see if there is sequence of I2C
794 * messages sent to same I2C bus.
795 */
796 static void rtl2832_i2c_gate_work(struct work_struct *work)
797 {
798 struct rtl2832_dev *dev = container_of(work, struct rtl2832_dev, i2c_gate_work.work);
799 struct i2c_client *client = dev->client;
800 int ret;
801
802 /* close gate */
803 ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x00);
804 if (ret)
805 goto err;
806
807 return;
808 err:
809 dev_dbg(&client->dev, "failed=%d\n", ret);
810 }
811
812 static int rtl2832_select(struct i2c_mux_core *muxc, u32 chan_id)
813 {
814 struct rtl2832_dev *dev = i2c_mux_priv(muxc);
815 struct i2c_client *client = dev->client;
816 int ret;
817
818 /* terminate possible gate closing */
819 cancel_delayed_work(&dev->i2c_gate_work);
820
821 /* open gate */
822 ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08);
823 if (ret)
824 goto err;
825
826 return 0;
827 err:
828 dev_dbg(&client->dev, "failed=%d\n", ret);
829 return ret;
830 }
831
832 static int rtl2832_deselect(struct i2c_mux_core *muxc, u32 chan_id)
833 {
834 struct rtl2832_dev *dev = i2c_mux_priv(muxc);
835
836 schedule_delayed_work(&dev->i2c_gate_work, usecs_to_jiffies(100));
837 return 0;
838 }
839
840 static struct dvb_frontend_ops rtl2832_ops = {
841 .delsys = { SYS_DVBT },
842 .info = {
843 .name = "Realtek RTL2832 (DVB-T)",
844 .frequency_min = 174000000,
845 .frequency_max = 862000000,
846 .frequency_stepsize = 166667,
847 .caps = FE_CAN_FEC_1_2 |
848 FE_CAN_FEC_2_3 |
849 FE_CAN_FEC_3_4 |
850 FE_CAN_FEC_5_6 |
851 FE_CAN_FEC_7_8 |
852 FE_CAN_FEC_AUTO |
853 FE_CAN_QPSK |
854 FE_CAN_QAM_16 |
855 FE_CAN_QAM_64 |
856 FE_CAN_QAM_AUTO |
857 FE_CAN_TRANSMISSION_MODE_AUTO |
858 FE_CAN_GUARD_INTERVAL_AUTO |
859 FE_CAN_HIERARCHY_AUTO |
860 FE_CAN_RECOVER |
861 FE_CAN_MUTE_TS
862 },
863
864 .init = rtl2832_init,
865 .sleep = rtl2832_sleep,
866
867 .get_tune_settings = rtl2832_get_tune_settings,
868
869 .set_frontend = rtl2832_set_frontend,
870 .get_frontend = rtl2832_get_frontend,
871
872 .read_status = rtl2832_read_status,
873 .read_snr = rtl2832_read_snr,
874 .read_ber = rtl2832_read_ber,
875 };
876
877 static bool rtl2832_volatile_reg(struct device *dev, unsigned int reg)
878 {
879 switch (reg) {
880 case 0x305:
881 case 0x33c:
882 case 0x34e:
883 case 0x351:
884 case 0x40c ... 0x40d:
885 return true;
886 default:
887 break;
888 }
889
890 return false;
891 }
892
893 static struct dvb_frontend *rtl2832_get_dvb_frontend(struct i2c_client *client)
894 {
895 struct rtl2832_dev *dev = i2c_get_clientdata(client);
896
897 dev_dbg(&client->dev, "\n");
898 return &dev->fe;
899 }
900
901 static struct i2c_adapter *rtl2832_get_i2c_adapter(struct i2c_client *client)
902 {
903 struct rtl2832_dev *dev = i2c_get_clientdata(client);
904
905 dev_dbg(&client->dev, "\n");
906 return dev->muxc->adapter[0];
907 }
908
909 static int rtl2832_slave_ts_ctrl(struct i2c_client *client, bool enable)
910 {
911 struct rtl2832_dev *dev = i2c_get_clientdata(client);
912 int ret;
913
914 dev_dbg(&client->dev, "enable=%d\n", enable);
915
916 if (enable) {
917 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x0);
918 if (ret)
919 goto err;
920 ret = regmap_bulk_write(dev->regmap, 0x10c, "\x5f\xff", 2);
921 if (ret)
922 goto err;
923 ret = rtl2832_wr_demod_reg(dev, DVBT_PIP_ON, 0x1);
924 if (ret)
925 goto err;
926 ret = regmap_bulk_write(dev->regmap, 0x0bc, "\x18", 1);
927 if (ret)
928 goto err;
929 ret = regmap_bulk_write(dev->regmap, 0x192, "\x7f\xf7\xff", 3);
930 if (ret)
931 goto err;
932 } else {
933 ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
934 if (ret)
935 goto err;
936 ret = regmap_bulk_write(dev->regmap, 0x0bc, "\x08", 1);
937 if (ret)
938 goto err;
939 ret = rtl2832_wr_demod_reg(dev, DVBT_PIP_ON, 0x0);
940 if (ret)
941 goto err;
942 ret = regmap_bulk_write(dev->regmap, 0x10c, "\x00\x00", 2);
943 if (ret)
944 goto err;
945 ret = rtl2832_wr_demod_reg(dev, DVBT_SOFT_RST, 0x1);
946 if (ret)
947 goto err;
948 }
949
950 dev->slave_ts = enable;
951
952 return 0;
953 err:
954 dev_dbg(&client->dev, "failed=%d\n", ret);
955 return ret;
956 }
957
958 static int rtl2832_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
959 {
960 struct rtl2832_dev *dev = fe->demodulator_priv;
961 struct i2c_client *client = dev->client;
962 int ret;
963 u8 u8tmp;
964
965 dev_dbg(&client->dev, "onoff=%d, slave_ts=%d\n", onoff, dev->slave_ts);
966
967 /* enable / disable PID filter */
968 if (onoff)
969 u8tmp = 0x80;
970 else
971 u8tmp = 0x00;
972
973 if (dev->slave_ts)
974 ret = regmap_update_bits(dev->regmap, 0x021, 0xc0, u8tmp);
975 else
976 ret = regmap_update_bits(dev->regmap, 0x061, 0xc0, u8tmp);
977 if (ret)
978 goto err;
979
980 return 0;
981 err:
982 dev_dbg(&client->dev, "failed=%d\n", ret);
983 return ret;
984 }
985
986 static int rtl2832_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid,
987 int onoff)
988 {
989 struct rtl2832_dev *dev = fe->demodulator_priv;
990 struct i2c_client *client = dev->client;
991 int ret;
992 u8 buf[4];
993
994 dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d slave_ts=%d\n",
995 index, pid, onoff, dev->slave_ts);
996
997 /* skip invalid PIDs (0x2000) */
998 if (pid > 0x1fff || index > 32)
999 return 0;
1000
1001 if (onoff)
1002 set_bit(index, &dev->filters);
1003 else
1004 clear_bit(index, &dev->filters);
1005
1006 /* enable / disable PIDs */
1007 buf[0] = (dev->filters >> 0) & 0xff;
1008 buf[1] = (dev->filters >> 8) & 0xff;
1009 buf[2] = (dev->filters >> 16) & 0xff;
1010 buf[3] = (dev->filters >> 24) & 0xff;
1011
1012 if (dev->slave_ts)
1013 ret = regmap_bulk_write(dev->regmap, 0x022, buf, 4);
1014 else
1015 ret = regmap_bulk_write(dev->regmap, 0x062, buf, 4);
1016 if (ret)
1017 goto err;
1018
1019 /* add PID */
1020 buf[0] = (pid >> 8) & 0xff;
1021 buf[1] = (pid >> 0) & 0xff;
1022
1023 if (dev->slave_ts)
1024 ret = regmap_bulk_write(dev->regmap, 0x026 + 2 * index, buf, 2);
1025 else
1026 ret = regmap_bulk_write(dev->regmap, 0x066 + 2 * index, buf, 2);
1027 if (ret)
1028 goto err;
1029
1030 return 0;
1031 err:
1032 dev_dbg(&client->dev, "failed=%d\n", ret);
1033 return ret;
1034 }
1035
1036 static int rtl2832_probe(struct i2c_client *client,
1037 const struct i2c_device_id *id)
1038 {
1039 struct rtl2832_platform_data *pdata = client->dev.platform_data;
1040 struct i2c_adapter *i2c = client->adapter;
1041 struct rtl2832_dev *dev;
1042 int ret;
1043 u8 tmp;
1044 static const struct regmap_range_cfg regmap_range_cfg[] = {
1045 {
1046 .selector_reg = 0x00,
1047 .selector_mask = 0xff,
1048 .selector_shift = 0,
1049 .window_start = 0,
1050 .window_len = 0x100,
1051 .range_min = 0 * 0x100,
1052 .range_max = 5 * 0x100,
1053 },
1054 };
1055
1056 dev_dbg(&client->dev, "\n");
1057
1058 /* allocate memory for the internal state */
1059 dev = kzalloc(sizeof(struct rtl2832_dev), GFP_KERNEL);
1060 if (dev == NULL) {
1061 ret = -ENOMEM;
1062 goto err;
1063 }
1064
1065 /* setup the state */
1066 i2c_set_clientdata(client, dev);
1067 dev->client = client;
1068 dev->pdata = client->dev.platform_data;
1069 dev->sleeping = true;
1070 INIT_DELAYED_WORK(&dev->i2c_gate_work, rtl2832_i2c_gate_work);
1071 /* create regmap */
1072 dev->regmap_config.reg_bits = 8,
1073 dev->regmap_config.val_bits = 8,
1074 dev->regmap_config.volatile_reg = rtl2832_volatile_reg,
1075 dev->regmap_config.max_register = 5 * 0x100,
1076 dev->regmap_config.ranges = regmap_range_cfg,
1077 dev->regmap_config.num_ranges = ARRAY_SIZE(regmap_range_cfg),
1078 dev->regmap_config.cache_type = REGCACHE_NONE,
1079 dev->regmap = regmap_init_i2c(client, &dev->regmap_config);
1080 if (IS_ERR(dev->regmap)) {
1081 ret = PTR_ERR(dev->regmap);
1082 goto err_kfree;
1083 }
1084
1085 /* check if the demod is there */
1086 ret = regmap_bulk_read(dev->regmap, 0x000, &tmp, 1);
1087 if (ret)
1088 goto err_regmap_exit;
1089
1090 /* create muxed i2c adapter for demod tuner bus */
1091 dev->muxc = i2c_mux_alloc(i2c, &i2c->dev, 1, 0, I2C_MUX_LOCKED,
1092 rtl2832_select, rtl2832_deselect);
1093 if (!dev->muxc) {
1094 ret = -ENOMEM;
1095 goto err_regmap_exit;
1096 }
1097 dev->muxc->priv = dev;
1098 ret = i2c_mux_add_adapter(dev->muxc, 0, 0, 0);
1099 if (ret)
1100 goto err_regmap_exit;
1101
1102 /* create dvb_frontend */
1103 memcpy(&dev->fe.ops, &rtl2832_ops, sizeof(struct dvb_frontend_ops));
1104 dev->fe.demodulator_priv = dev;
1105
1106 /* setup callbacks */
1107 pdata->get_dvb_frontend = rtl2832_get_dvb_frontend;
1108 pdata->get_i2c_adapter = rtl2832_get_i2c_adapter;
1109 pdata->slave_ts_ctrl = rtl2832_slave_ts_ctrl;
1110 pdata->pid_filter = rtl2832_pid_filter;
1111 pdata->pid_filter_ctrl = rtl2832_pid_filter_ctrl;
1112 pdata->regmap = dev->regmap;
1113
1114 dev_info(&client->dev, "Realtek RTL2832 successfully attached\n");
1115 return 0;
1116 err_regmap_exit:
1117 regmap_exit(dev->regmap);
1118 err_kfree:
1119 kfree(dev);
1120 err:
1121 dev_dbg(&client->dev, "failed=%d\n", ret);
1122 return ret;
1123 }
1124
1125 static int rtl2832_remove(struct i2c_client *client)
1126 {
1127 struct rtl2832_dev *dev = i2c_get_clientdata(client);
1128
1129 dev_dbg(&client->dev, "\n");
1130
1131 cancel_delayed_work_sync(&dev->i2c_gate_work);
1132
1133 i2c_mux_del_adapters(dev->muxc);
1134
1135 regmap_exit(dev->regmap);
1136
1137 kfree(dev);
1138
1139 return 0;
1140 }
1141
1142 static const struct i2c_device_id rtl2832_id_table[] = {
1143 {"rtl2832", 0},
1144 {}
1145 };
1146 MODULE_DEVICE_TABLE(i2c, rtl2832_id_table);
1147
1148 static struct i2c_driver rtl2832_driver = {
1149 .driver = {
1150 .name = "rtl2832",
1151 .suppress_bind_attrs = true,
1152 },
1153 .probe = rtl2832_probe,
1154 .remove = rtl2832_remove,
1155 .id_table = rtl2832_id_table,
1156 };
1157
1158 module_i2c_driver(rtl2832_driver);
1159
1160 MODULE_AUTHOR("Thomas Mair <mair.thomas86@gmail.com>");
1161 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1162 MODULE_DESCRIPTION("Realtek RTL2832 DVB-T demodulator driver");
1163 MODULE_LICENSE("GPL");
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