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