// SPDX-License-Identifier: GPL-2.0-or-later /* * Fitipower FC0011 tuner driver * * Copyright (C) 2012 Michael Buesch <m@bues.ch> * * Derived from FC0012 tuner driver: * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net> */ #include "fc0011.h" /* Tuner registers */ enum { FC11_REG_0, FC11_REG_FA, /* FA */ FC11_REG_FP, /* FP */ FC11_REG_XINHI, /* XIN high 8 bit */ FC11_REG_XINLO, /* XIN low 8 bit */ FC11_REG_VCO, /* VCO */ FC11_REG_VCOSEL, /* VCO select */ FC11_REG_7, /* Unknown tuner reg 7 */ FC11_REG_8, /* Unknown tuner reg 8 */ FC11_REG_9, FC11_REG_10, /* Unknown tuner reg 10 */ FC11_REG_11, /* Unknown tuner reg 11 */ FC11_REG_12, FC11_REG_RCCAL, /* RC calibrate */ FC11_REG_VCOCAL, /* VCO calibrate */ FC11_REG_15, FC11_REG_16, /* Unknown tuner reg 16 */ FC11_REG_17, FC11_NR_REGS, /* Number of registers */ }; enum FC11_REG_VCOSEL_bits { FC11_VCOSEL_2 = 0x08, /* VCO select 2 */ FC11_VCOSEL_1 = 0x10, /* VCO select 1 */ FC11_VCOSEL_CLKOUT = 0x20, /* Fix clock out */ FC11_VCOSEL_BW7M = 0x40, /* 7MHz bw */ FC11_VCOSEL_BW6M = 0x80, /* 6MHz bw */ }; enum FC11_REG_RCCAL_bits { FC11_RCCAL_FORCE = 0x10, /* force */ }; enum FC11_REG_VCOCAL_bits { FC11_VCOCAL_RUN = 0, /* VCO calibration run */ FC11_VCOCAL_VALUEMASK = 0x3F, /* VCO calibration value mask */ FC11_VCOCAL_OK = 0x40, /* VCO calibration Ok */ FC11_VCOCAL_RESET = 0x80, /* VCO calibration reset */ }; struct fc0011_priv { struct i2c_adapter *i2c; u8 addr; u32 frequency; u32 bandwidth; }; static int fc0011_writereg(struct fc0011_priv *priv, u8 reg, u8 val) { u8 buf[2] = { reg, val }; struct i2c_msg msg = { .addr = priv->addr, .flags = 0, .buf = buf, .len = 2 }; if (i2c_transfer(priv->i2c, &msg, 1) != 1) { dev_err(&priv->i2c->dev, "I2C write reg failed, reg: %02x, val: %02x\n", reg, val); return -EIO; } return 0; } static int fc0011_readreg(struct fc0011_priv *priv, u8 reg, u8 *val) { u8 dummy; struct i2c_msg msg[2] = { { .addr = priv->addr, .flags = 0, .buf = ®, .len = 1 }, { .addr = priv->addr, .flags = I2C_M_RD, .buf = val ? : &dummy, .len = 1 }, }; if (i2c_transfer(priv->i2c, msg, 2) != 2) { dev_err(&priv->i2c->dev, "I2C read failed, reg: %02x\n", reg); return -EIO; } return 0; } static void fc0011_release(struct dvb_frontend *fe) { kfree(fe->tuner_priv); fe->tuner_priv = NULL; } static int fc0011_init(struct dvb_frontend *fe) { struct fc0011_priv *priv = fe->tuner_priv; int err; if (WARN_ON(!fe->callback)) return -EINVAL; err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER, FC0011_FE_CALLBACK_POWER, priv->addr); if (err) { dev_err(&priv->i2c->dev, "Power-on callback failed\n"); return err; } err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER, FC0011_FE_CALLBACK_RESET, priv->addr); if (err) { dev_err(&priv->i2c->dev, "Reset callback failed\n"); return err; } return 0; } /* Initiate VCO calibration */ static int fc0011_vcocal_trigger(struct fc0011_priv *priv) { int err; err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RESET); if (err) return err; err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN); if (err) return err; return 0; } /* Read VCO calibration value */ static int fc0011_vcocal_read(struct fc0011_priv *priv, u8 *value) { int err; err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN); if (err) return err; usleep_range(10000, 20000); err = fc0011_readreg(priv, FC11_REG_VCOCAL, value); if (err) return err; return 0; } static int fc0011_set_params(struct dvb_frontend *fe) { struct dtv_frontend_properties *p = &fe->dtv_property_cache; struct fc0011_priv *priv = fe->tuner_priv; int err; unsigned int i, vco_retries; u32 freq = p->frequency / 1000; u32 bandwidth = p->bandwidth_hz / 1000; u32 fvco, xin, frac, xdiv, xdivr; u8 fa, fp, vco_sel, vco_cal; u8 regs[FC11_NR_REGS] = { }; regs[FC11_REG_7] = 0x0F; regs[FC11_REG_8] = 0x3E; regs[FC11_REG_10] = 0xB8; regs[FC11_REG_11] = 0x80; regs[FC11_REG_RCCAL] = 0x04; err = fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]); err |= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]); err |= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]); err |= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]); err |= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]); if (err) return -EIO; /* Set VCO freq and VCO div */ if (freq < 54000) { fvco = freq * 64; regs[FC11_REG_VCO] = 0x82; } else if (freq < 108000) { fvco = freq * 32; regs[FC11_REG_VCO] = 0x42; } else if (freq < 216000) { fvco = freq * 16; regs[FC11_REG_VCO] = 0x22; } else if (freq < 432000) { fvco = freq * 8; regs[FC11_REG_VCO] = 0x12; } else { fvco = freq * 4; regs[FC11_REG_VCO] = 0x0A; } /* Calc XIN. The PLL reference frequency is 18 MHz. */ xdiv = fvco / 18000; WARN_ON(xdiv > 0xFF); frac = fvco - xdiv * 18000; frac = (frac << 15) / 18000; if (frac >= 16384) frac += 32786; if (!frac) xin = 0; else xin = clamp_t(u32, frac, 512, 65024); regs[FC11_REG_XINHI] = xin >> 8; regs[FC11_REG_XINLO] = xin; /* Calc FP and FA */ xdivr = xdiv; if (fvco - xdiv * 18000 >= 9000) xdivr += 1; /* round */ fp = xdivr / 8; fa = xdivr - fp * 8; if (fa < 2) { fp -= 1; fa += 8; } if (fp > 0x1F) { fp = 0x1F; fa = 0xF; } if (fa >= fp) { dev_warn(&priv->i2c->dev, "fa %02X >= fp %02X, but trying to continue\n", (unsigned int)(u8)fa, (unsigned int)(u8)fp); } regs[FC11_REG_FA] = fa; regs[FC11_REG_FP] = fp; /* Select bandwidth */ switch (bandwidth) { case 8000: break; case 7000: regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_BW7M; break; default: dev_warn(&priv->i2c->dev, "Unsupported bandwidth %u kHz. Using 6000 kHz.\n", bandwidth); bandwidth = 6000; /* fallthrough */ case 6000: regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_BW6M; break; } /* Pre VCO select */ if (fvco < 2320000) { vco_sel = 0; regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); } else if (fvco < 3080000) { vco_sel = 1; regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1; } else { vco_sel = 2; regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2; } /* Fix for low freqs */ if (freq < 45000) { regs[FC11_REG_FA] = 0x6; regs[FC11_REG_FP] = 0x11; } /* Clock out fix */ regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_CLKOUT; /* Write the cached registers */ for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++) { err = fc0011_writereg(priv, i, regs[i]); if (err) return err; } /* VCO calibration */ err = fc0011_vcocal_trigger(priv); if (err) return err; err = fc0011_vcocal_read(priv, &vco_cal); if (err) return err; vco_retries = 0; while (!(vco_cal & FC11_VCOCAL_OK) && vco_retries < 3) { /* Reset the tuner and try again */ err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER, FC0011_FE_CALLBACK_RESET, priv->addr); if (err) { dev_err(&priv->i2c->dev, "Failed to reset tuner\n"); return err; } /* Reinit tuner config */ err = 0; for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++) err |= fc0011_writereg(priv, i, regs[i]); err |= fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]); err |= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]); err |= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]); err |= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]); err |= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]); if (err) return -EIO; /* VCO calibration */ err = fc0011_vcocal_trigger(priv); if (err) return err; err = fc0011_vcocal_read(priv, &vco_cal); if (err) return err; vco_retries++; } if (!(vco_cal & FC11_VCOCAL_OK)) { dev_err(&priv->i2c->dev, "Failed to read VCO calibration value (got %02X)\n", (unsigned int)vco_cal); return -EIO; } vco_cal &= FC11_VCOCAL_VALUEMASK; switch (vco_sel) { default: WARN_ON(1); return -EINVAL; case 0: if (vco_cal < 8) { regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1; err = fc0011_writereg(priv, FC11_REG_VCOSEL, regs[FC11_REG_VCOSEL]); if (err) return err; err = fc0011_vcocal_trigger(priv); if (err) return err; } else { regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); err = fc0011_writereg(priv, FC11_REG_VCOSEL, regs[FC11_REG_VCOSEL]); if (err) return err; } break; case 1: if (vco_cal < 5) { regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2; err = fc0011_writereg(priv, FC11_REG_VCOSEL, regs[FC11_REG_VCOSEL]); if (err) return err; err = fc0011_vcocal_trigger(priv); if (err) return err; } else if (vco_cal <= 48) { regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1; err = fc0011_writereg(priv, FC11_REG_VCOSEL, regs[FC11_REG_VCOSEL]); if (err) return err; } else { regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); err = fc0011_writereg(priv, FC11_REG_VCOSEL, regs[FC11_REG_VCOSEL]); if (err) return err; err = fc0011_vcocal_trigger(priv); if (err) return err; } break; case 2: if (vco_cal > 53) { regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1; err = fc0011_writereg(priv, FC11_REG_VCOSEL, regs[FC11_REG_VCOSEL]); if (err) return err; err = fc0011_vcocal_trigger(priv); if (err) return err; } else { regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2); regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2; err = fc0011_writereg(priv, FC11_REG_VCOSEL, regs[FC11_REG_VCOSEL]); if (err) return err; } break; } err = fc0011_vcocal_read(priv, NULL); if (err) return err; usleep_range(10000, 50000); err = fc0011_readreg(priv, FC11_REG_RCCAL, ®s[FC11_REG_RCCAL]); if (err) return err; regs[FC11_REG_RCCAL] |= FC11_RCCAL_FORCE; err = fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]); if (err) return err; regs[FC11_REG_16] = 0xB; err = fc0011_writereg(priv, FC11_REG_16, regs[FC11_REG_16]); if (err) return err; dev_dbg(&priv->i2c->dev, "Tuned to fa=%02X fp=%02X xin=%02X%02X vco=%02X vcosel=%02X vcocal=%02X(%u) bw=%u\n", (unsigned int)regs[FC11_REG_FA], (unsigned int)regs[FC11_REG_FP], (unsigned int)regs[FC11_REG_XINHI], (unsigned int)regs[FC11_REG_XINLO], (unsigned int)regs[FC11_REG_VCO], (unsigned int)regs[FC11_REG_VCOSEL], (unsigned int)vco_cal, vco_retries, (unsigned int)bandwidth); priv->frequency = p->frequency; priv->bandwidth = p->bandwidth_hz; return 0; } static int fc0011_get_frequency(struct dvb_frontend *fe, u32 *frequency) { struct fc0011_priv *priv = fe->tuner_priv; *frequency = priv->frequency; return 0; } static int fc0011_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) { *frequency = 0; return 0; } static int fc0011_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) { struct fc0011_priv *priv = fe->tuner_priv; *bandwidth = priv->bandwidth; return 0; } static const struct dvb_tuner_ops fc0011_tuner_ops = { .info = { .name = "Fitipower FC0011", .frequency_min_hz = 45 * MHz, .frequency_max_hz = 1000 * MHz, }, .release = fc0011_release, .init = fc0011_init, .set_params = fc0011_set_params, .get_frequency = fc0011_get_frequency, .get_if_frequency = fc0011_get_if_frequency, .get_bandwidth = fc0011_get_bandwidth, }; struct dvb_frontend *fc0011_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, const struct fc0011_config *config) { struct fc0011_priv *priv; priv = kzalloc(sizeof(struct fc0011_priv), GFP_KERNEL); if (!priv) return NULL; priv->i2c = i2c; priv->addr = config->i2c_address; fe->tuner_priv = priv; fe->ops.tuner_ops = fc0011_tuner_ops; dev_info(&priv->i2c->dev, "Fitipower FC0011 tuner attached\n"); return fe; } EXPORT_SYMBOL(fc0011_attach); MODULE_DESCRIPTION("Fitipower FC0011 silicon tuner driver"); MODULE_AUTHOR("Michael Buesch <m@bues.ch>"); MODULE_LICENSE("GPL");