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linux/drivers/media/tuners/fc0011.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 
Based on 3 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] this program is distributed in the hope that
  it will be useful but without any warranty without even the implied
  warranty of merchantability or fitness for a particular purpose see
  the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] this program is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

507 lines
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// 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 = &reg, .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, &regs[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");
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