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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Fitipower FC0011 tuner driver4 *5 * Copyright (C) 2012 Michael Buesch <m@bues.ch>6 *7 * Derived from FC0012 tuner driver:8 * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>9 */10 11#include "fc0011.h"12 13 14/* Tuner registers */15enum {16 FC11_REG_0,17 FC11_REG_FA, /* FA */18 FC11_REG_FP, /* FP */19 FC11_REG_XINHI, /* XIN high 8 bit */20 FC11_REG_XINLO, /* XIN low 8 bit */21 FC11_REG_VCO, /* VCO */22 FC11_REG_VCOSEL, /* VCO select */23 FC11_REG_7, /* Unknown tuner reg 7 */24 FC11_REG_8, /* Unknown tuner reg 8 */25 FC11_REG_9,26 FC11_REG_10, /* Unknown tuner reg 10 */27 FC11_REG_11, /* Unknown tuner reg 11 */28 FC11_REG_12,29 FC11_REG_RCCAL, /* RC calibrate */30 FC11_REG_VCOCAL, /* VCO calibrate */31 FC11_REG_15,32 FC11_REG_16, /* Unknown tuner reg 16 */33 FC11_REG_17,34 35 FC11_NR_REGS, /* Number of registers */36};37 38enum FC11_REG_VCOSEL_bits {39 FC11_VCOSEL_2 = 0x08, /* VCO select 2 */40 FC11_VCOSEL_1 = 0x10, /* VCO select 1 */41 FC11_VCOSEL_CLKOUT = 0x20, /* Fix clock out */42 FC11_VCOSEL_BW7M = 0x40, /* 7MHz bw */43 FC11_VCOSEL_BW6M = 0x80, /* 6MHz bw */44};45 46enum FC11_REG_RCCAL_bits {47 FC11_RCCAL_FORCE = 0x10, /* force */48};49 50enum FC11_REG_VCOCAL_bits {51 FC11_VCOCAL_RUN = 0, /* VCO calibration run */52 FC11_VCOCAL_VALUEMASK = 0x3F, /* VCO calibration value mask */53 FC11_VCOCAL_OK = 0x40, /* VCO calibration Ok */54 FC11_VCOCAL_RESET = 0x80, /* VCO calibration reset */55};56 57 58struct fc0011_priv {59 struct i2c_adapter *i2c;60 u8 addr;61 62 u32 frequency;63 u32 bandwidth;64};65 66 67static int fc0011_writereg(struct fc0011_priv *priv, u8 reg, u8 val)68{69 u8 buf[2] = { reg, val };70 struct i2c_msg msg = { .addr = priv->addr,71 .flags = 0, .buf = buf, .len = 2 };72 73 if (i2c_transfer(priv->i2c, &msg, 1) != 1) {74 dev_err(&priv->i2c->dev,75 "I2C write reg failed, reg: %02x, val: %02x\n",76 reg, val);77 return -EIO;78 }79 80 return 0;81}82 83static int fc0011_readreg(struct fc0011_priv *priv, u8 reg, u8 *val)84{85 u8 dummy;86 struct i2c_msg msg[2] = {87 { .addr = priv->addr,88 .flags = 0, .buf = ®, .len = 1 },89 { .addr = priv->addr,90 .flags = I2C_M_RD, .buf = val ? : &dummy, .len = 1 },91 };92 93 if (i2c_transfer(priv->i2c, msg, 2) != 2) {94 dev_err(&priv->i2c->dev,95 "I2C read failed, reg: %02x\n", reg);96 return -EIO;97 }98 99 return 0;100}101 102static void fc0011_release(struct dvb_frontend *fe)103{104 kfree(fe->tuner_priv);105 fe->tuner_priv = NULL;106}107 108static int fc0011_init(struct dvb_frontend *fe)109{110 struct fc0011_priv *priv = fe->tuner_priv;111 int err;112 113 if (WARN_ON(!fe->callback))114 return -EINVAL;115 116 err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,117 FC0011_FE_CALLBACK_POWER, priv->addr);118 if (err) {119 dev_err(&priv->i2c->dev, "Power-on callback failed\n");120 return err;121 }122 err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,123 FC0011_FE_CALLBACK_RESET, priv->addr);124 if (err) {125 dev_err(&priv->i2c->dev, "Reset callback failed\n");126 return err;127 }128 129 return 0;130}131 132/* Initiate VCO calibration */133static int fc0011_vcocal_trigger(struct fc0011_priv *priv)134{135 int err;136 137 err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RESET);138 if (err)139 return err;140 err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN);141 if (err)142 return err;143 144 return 0;145}146 147/* Read VCO calibration value */148static int fc0011_vcocal_read(struct fc0011_priv *priv, u8 *value)149{150 int err;151 152 err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN);153 if (err)154 return err;155 usleep_range(10000, 20000);156 err = fc0011_readreg(priv, FC11_REG_VCOCAL, value);157 if (err)158 return err;159 160 return 0;161}162 163static int fc0011_set_params(struct dvb_frontend *fe)164{165 struct dtv_frontend_properties *p = &fe->dtv_property_cache;166 struct fc0011_priv *priv = fe->tuner_priv;167 int err;168 unsigned int i, vco_retries;169 u32 freq = p->frequency / 1000;170 u32 bandwidth = p->bandwidth_hz / 1000;171 u32 fvco, xin, frac, xdiv, xdivr;172 u8 fa, fp, vco_sel, vco_cal;173 u8 regs[FC11_NR_REGS] = { };174 175 regs[FC11_REG_7] = 0x0F;176 regs[FC11_REG_8] = 0x3E;177 regs[FC11_REG_10] = 0xB8;178 regs[FC11_REG_11] = 0x80;179 regs[FC11_REG_RCCAL] = 0x04;180 err = fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]);181 err |= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]);182 err |= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]);183 err |= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]);184 err |= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);185 if (err)186 return -EIO;187 188 /* Set VCO freq and VCO div */189 if (freq < 54000) {190 fvco = freq * 64;191 regs[FC11_REG_VCO] = 0x82;192 } else if (freq < 108000) {193 fvco = freq * 32;194 regs[FC11_REG_VCO] = 0x42;195 } else if (freq < 216000) {196 fvco = freq * 16;197 regs[FC11_REG_VCO] = 0x22;198 } else if (freq < 432000) {199 fvco = freq * 8;200 regs[FC11_REG_VCO] = 0x12;201 } else {202 fvco = freq * 4;203 regs[FC11_REG_VCO] = 0x0A;204 }205 206 /* Calc XIN. The PLL reference frequency is 18 MHz. */207 xdiv = fvco / 18000;208 WARN_ON(xdiv > 0xFF);209 frac = fvco - xdiv * 18000;210 frac = (frac << 15) / 18000;211 if (frac >= 16384)212 frac += 32786;213 if (!frac)214 xin = 0;215 else216 xin = clamp_t(u32, frac, 512, 65024);217 regs[FC11_REG_XINHI] = xin >> 8;218 regs[FC11_REG_XINLO] = xin;219 220 /* Calc FP and FA */221 xdivr = xdiv;222 if (fvco - xdiv * 18000 >= 9000)223 xdivr += 1; /* round */224 fp = xdivr / 8;225 fa = xdivr - fp * 8;226 if (fa < 2) {227 fp -= 1;228 fa += 8;229 }230 if (fp > 0x1F) {231 fp = 0x1F;232 fa = 0xF;233 }234 if (fa >= fp) {235 dev_warn(&priv->i2c->dev,236 "fa %02X >= fp %02X, but trying to continue\n",237 (unsigned int)(u8)fa, (unsigned int)(u8)fp);238 }239 regs[FC11_REG_FA] = fa;240 regs[FC11_REG_FP] = fp;241 242 /* Select bandwidth */243 switch (bandwidth) {244 case 8000:245 break;246 case 7000:247 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_BW7M;248 break;249 default:250 dev_warn(&priv->i2c->dev, "Unsupported bandwidth %u kHz. Using 6000 kHz.\n",251 bandwidth);252 bandwidth = 6000;253 fallthrough;254 case 6000:255 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_BW6M;256 break;257 }258 259 /* Pre VCO select */260 if (fvco < 2320000) {261 vco_sel = 0;262 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);263 } else if (fvco < 3080000) {264 vco_sel = 1;265 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);266 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;267 } else {268 vco_sel = 2;269 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);270 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;271 }272 273 /* Fix for low freqs */274 if (freq < 45000) {275 regs[FC11_REG_FA] = 0x6;276 regs[FC11_REG_FP] = 0x11;277 }278 279 /* Clock out fix */280 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_CLKOUT;281 282 /* Write the cached registers */283 for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++) {284 err = fc0011_writereg(priv, i, regs[i]);285 if (err)286 return err;287 }288 289 /* VCO calibration */290 err = fc0011_vcocal_trigger(priv);291 if (err)292 return err;293 err = fc0011_vcocal_read(priv, &vco_cal);294 if (err)295 return err;296 vco_retries = 0;297 while (!(vco_cal & FC11_VCOCAL_OK) && vco_retries < 3) {298 /* Reset the tuner and try again */299 err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,300 FC0011_FE_CALLBACK_RESET, priv->addr);301 if (err) {302 dev_err(&priv->i2c->dev, "Failed to reset tuner\n");303 return err;304 }305 /* Reinit tuner config */306 err = 0;307 for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++)308 err |= fc0011_writereg(priv, i, regs[i]);309 err |= fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]);310 err |= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]);311 err |= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]);312 err |= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]);313 err |= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);314 if (err)315 return -EIO;316 /* VCO calibration */317 err = fc0011_vcocal_trigger(priv);318 if (err)319 return err;320 err = fc0011_vcocal_read(priv, &vco_cal);321 if (err)322 return err;323 vco_retries++;324 }325 if (!(vco_cal & FC11_VCOCAL_OK)) {326 dev_err(&priv->i2c->dev,327 "Failed to read VCO calibration value (got %02X)\n",328 (unsigned int)vco_cal);329 return -EIO;330 }331 vco_cal &= FC11_VCOCAL_VALUEMASK;332 333 switch (vco_sel) {334 default:335 WARN_ON(1);336 return -EINVAL;337 case 0:338 if (vco_cal < 8) {339 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);340 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;341 err = fc0011_writereg(priv, FC11_REG_VCOSEL,342 regs[FC11_REG_VCOSEL]);343 if (err)344 return err;345 err = fc0011_vcocal_trigger(priv);346 if (err)347 return err;348 } else {349 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);350 err = fc0011_writereg(priv, FC11_REG_VCOSEL,351 regs[FC11_REG_VCOSEL]);352 if (err)353 return err;354 }355 break;356 case 1:357 if (vco_cal < 5) {358 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);359 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;360 err = fc0011_writereg(priv, FC11_REG_VCOSEL,361 regs[FC11_REG_VCOSEL]);362 if (err)363 return err;364 err = fc0011_vcocal_trigger(priv);365 if (err)366 return err;367 } else if (vco_cal <= 48) {368 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);369 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;370 err = fc0011_writereg(priv, FC11_REG_VCOSEL,371 regs[FC11_REG_VCOSEL]);372 if (err)373 return err;374 } else {375 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);376 err = fc0011_writereg(priv, FC11_REG_VCOSEL,377 regs[FC11_REG_VCOSEL]);378 if (err)379 return err;380 err = fc0011_vcocal_trigger(priv);381 if (err)382 return err;383 }384 break;385 case 2:386 if (vco_cal > 53) {387 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);388 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;389 err = fc0011_writereg(priv, FC11_REG_VCOSEL,390 regs[FC11_REG_VCOSEL]);391 if (err)392 return err;393 err = fc0011_vcocal_trigger(priv);394 if (err)395 return err;396 } else {397 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);398 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;399 err = fc0011_writereg(priv, FC11_REG_VCOSEL,400 regs[FC11_REG_VCOSEL]);401 if (err)402 return err;403 }404 break;405 }406 err = fc0011_vcocal_read(priv, NULL);407 if (err)408 return err;409 usleep_range(10000, 50000);410 411 err = fc0011_readreg(priv, FC11_REG_RCCAL, ®s[FC11_REG_RCCAL]);412 if (err)413 return err;414 regs[FC11_REG_RCCAL] |= FC11_RCCAL_FORCE;415 err = fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);416 if (err)417 return err;418 regs[FC11_REG_16] = 0xB;419 err = fc0011_writereg(priv, FC11_REG_16, regs[FC11_REG_16]);420 if (err)421 return err;422 423 dev_dbg(&priv->i2c->dev, "Tuned to fa=%02X fp=%02X xin=%02X%02X vco=%02X vcosel=%02X vcocal=%02X(%u) bw=%u\n",424 (unsigned int)regs[FC11_REG_FA],425 (unsigned int)regs[FC11_REG_FP],426 (unsigned int)regs[FC11_REG_XINHI],427 (unsigned int)regs[FC11_REG_XINLO],428 (unsigned int)regs[FC11_REG_VCO],429 (unsigned int)regs[FC11_REG_VCOSEL],430 (unsigned int)vco_cal, vco_retries,431 (unsigned int)bandwidth);432 433 priv->frequency = p->frequency;434 priv->bandwidth = p->bandwidth_hz;435 436 return 0;437}438 439static int fc0011_get_frequency(struct dvb_frontend *fe, u32 *frequency)440{441 struct fc0011_priv *priv = fe->tuner_priv;442 443 *frequency = priv->frequency;444 445 return 0;446}447 448static int fc0011_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)449{450 *frequency = 0;451 452 return 0;453}454 455static int fc0011_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)456{457 struct fc0011_priv *priv = fe->tuner_priv;458 459 *bandwidth = priv->bandwidth;460 461 return 0;462}463 464static const struct dvb_tuner_ops fc0011_tuner_ops = {465 .info = {466 .name = "Fitipower FC0011",467 468 .frequency_min_hz = 45 * MHz,469 .frequency_max_hz = 1000 * MHz,470 },471 472 .release = fc0011_release,473 .init = fc0011_init,474 475 .set_params = fc0011_set_params,476 477 .get_frequency = fc0011_get_frequency,478 .get_if_frequency = fc0011_get_if_frequency,479 .get_bandwidth = fc0011_get_bandwidth,480};481 482struct dvb_frontend *fc0011_attach(struct dvb_frontend *fe,483 struct i2c_adapter *i2c,484 const struct fc0011_config *config)485{486 struct fc0011_priv *priv;487 488 priv = kzalloc(sizeof(struct fc0011_priv), GFP_KERNEL);489 if (!priv)490 return NULL;491 492 priv->i2c = i2c;493 priv->addr = config->i2c_address;494 495 fe->tuner_priv = priv;496 fe->ops.tuner_ops = fc0011_tuner_ops;497 498 dev_info(&priv->i2c->dev, "Fitipower FC0011 tuner attached\n");499 500 return fe;501}502EXPORT_SYMBOL_GPL(fc0011_attach);503 504MODULE_DESCRIPTION("Fitipower FC0011 silicon tuner driver");505MODULE_AUTHOR("Michael Buesch <m@bues.ch>");506MODULE_LICENSE("GPL");507