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alistair23-linux/drivers/media/tuners/fc2580.c
Thomas Gleixner 1621633323 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 
Based on 2 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 you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  51 franklin street fifth floor boston ma 02110 1301 usa

  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 [no]_[pad]_[ctrl] 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 you should have received a copy of the gnu general
  public license along with this program if not write to the free
  software foundation inc 51 franklin street fifth floor boston ma
  02110 1301 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 176 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190519154040.652910950@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 11:28:39 +02:00

625 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* FCI FC2580 silicon tuner driver
*
* Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
*/
#include "fc2580_priv.h"
/*
* TODO:
* I2C write and read works only for one single register. Multiple registers
* could not be accessed using normal register address auto-increment.
* There could be (very likely) register to change that behavior....
*/
/* write single register conditionally only when value differs from 0xff
* XXX: This is special routine meant only for writing fc2580_freq_regs_lut[]
* values. Do not use for the other purposes. */
static int fc2580_wr_reg_ff(struct fc2580_dev *dev, u8 reg, u8 val)
{
if (val == 0xff)
return 0;
else
return regmap_write(dev->regmap, reg, val);
}
static int fc2580_set_params(struct fc2580_dev *dev)
{
struct i2c_client *client = dev->client;
int ret, i;
unsigned int uitmp, div_ref, div_ref_val, div_n, k, k_cw, div_out;
u64 f_vco;
u8 synth_config;
unsigned long timeout;
if (!dev->active) {
dev_dbg(&client->dev, "tuner is sleeping\n");
return 0;
}
/*
* Fractional-N synthesizer
*
* +---------------------------------------+
* v |
* Fref +----+ +----+ +-------+ +----+ +------+ +---+
* ------> | /R | --> | PD | --> | VCO | ------> | /2 | --> | /N.F | <-- | K |
* +----+ +----+ +-------+ +----+ +------+ +---+
* |
* |
* v
* +-------+ Fout
* | /Rout | ------>
* +-------+
*/
for (i = 0; i < ARRAY_SIZE(fc2580_pll_lut); i++) {
if (dev->f_frequency <= fc2580_pll_lut[i].freq)
break;
}
if (i == ARRAY_SIZE(fc2580_pll_lut)) {
ret = -EINVAL;
goto err;
}
#define DIV_PRE_N 2
#define F_REF dev->clk
div_out = fc2580_pll_lut[i].div_out;
f_vco = (u64) dev->f_frequency * div_out;
synth_config = fc2580_pll_lut[i].band;
if (f_vco < 2600000000ULL)
synth_config |= 0x06;
else
synth_config |= 0x0e;
/* select reference divider R (keep PLL div N in valid range) */
#define DIV_N_MIN 76
if (f_vco >= div_u64((u64) DIV_PRE_N * DIV_N_MIN * F_REF, 1)) {
div_ref = 1;
div_ref_val = 0x00;
} else if (f_vco >= div_u64((u64) DIV_PRE_N * DIV_N_MIN * F_REF, 2)) {
div_ref = 2;
div_ref_val = 0x10;
} else {
div_ref = 4;
div_ref_val = 0x20;
}
/* calculate PLL integer and fractional control word */
uitmp = DIV_PRE_N * F_REF / div_ref;
div_n = div_u64_rem(f_vco, uitmp, &k);
k_cw = div_u64((u64) k * 0x100000, uitmp);
dev_dbg(&client->dev,
"frequency=%u bandwidth=%u f_vco=%llu F_REF=%u div_ref=%u div_n=%u k=%u div_out=%u k_cw=%0x\n",
dev->f_frequency, dev->f_bandwidth, f_vco, F_REF, div_ref,
div_n, k, div_out, k_cw);
ret = regmap_write(dev->regmap, 0x02, synth_config);
if (ret)
goto err;
ret = regmap_write(dev->regmap, 0x18, div_ref_val << 0 | k_cw >> 16);
if (ret)
goto err;
ret = regmap_write(dev->regmap, 0x1a, (k_cw >> 8) & 0xff);
if (ret)
goto err;
ret = regmap_write(dev->regmap, 0x1b, (k_cw >> 0) & 0xff);
if (ret)
goto err;
ret = regmap_write(dev->regmap, 0x1c, div_n);
if (ret)
goto err;
/* registers */
for (i = 0; i < ARRAY_SIZE(fc2580_freq_regs_lut); i++) {
if (dev->f_frequency <= fc2580_freq_regs_lut[i].freq)
break;
}
if (i == ARRAY_SIZE(fc2580_freq_regs_lut)) {
ret = -EINVAL;
goto err;
}
ret = fc2580_wr_reg_ff(dev, 0x25, fc2580_freq_regs_lut[i].r25_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x27, fc2580_freq_regs_lut[i].r27_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x28, fc2580_freq_regs_lut[i].r28_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x29, fc2580_freq_regs_lut[i].r29_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x2b, fc2580_freq_regs_lut[i].r2b_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x2c, fc2580_freq_regs_lut[i].r2c_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x2d, fc2580_freq_regs_lut[i].r2d_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x30, fc2580_freq_regs_lut[i].r30_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x44, fc2580_freq_regs_lut[i].r44_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x50, fc2580_freq_regs_lut[i].r50_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x53, fc2580_freq_regs_lut[i].r53_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x5f, fc2580_freq_regs_lut[i].r5f_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x61, fc2580_freq_regs_lut[i].r61_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x62, fc2580_freq_regs_lut[i].r62_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x63, fc2580_freq_regs_lut[i].r63_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x67, fc2580_freq_regs_lut[i].r67_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x68, fc2580_freq_regs_lut[i].r68_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x69, fc2580_freq_regs_lut[i].r69_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x6a, fc2580_freq_regs_lut[i].r6a_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x6b, fc2580_freq_regs_lut[i].r6b_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x6c, fc2580_freq_regs_lut[i].r6c_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x6d, fc2580_freq_regs_lut[i].r6d_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x6e, fc2580_freq_regs_lut[i].r6e_val);
if (ret)
goto err;
ret = fc2580_wr_reg_ff(dev, 0x6f, fc2580_freq_regs_lut[i].r6f_val);
if (ret)
goto err;
/* IF filters */
for (i = 0; i < ARRAY_SIZE(fc2580_if_filter_lut); i++) {
if (dev->f_bandwidth <= fc2580_if_filter_lut[i].freq)
break;
}
if (i == ARRAY_SIZE(fc2580_if_filter_lut)) {
ret = -EINVAL;
goto err;
}
ret = regmap_write(dev->regmap, 0x36, fc2580_if_filter_lut[i].r36_val);
if (ret)
goto err;
uitmp = (unsigned int) 8058000 - (dev->f_bandwidth * 122 / 100 / 2);
uitmp = div64_u64((u64) dev->clk * uitmp, 1000000000000ULL);
ret = regmap_write(dev->regmap, 0x37, uitmp);
if (ret)
goto err;
ret = regmap_write(dev->regmap, 0x39, fc2580_if_filter_lut[i].r39_val);
if (ret)
goto err;
timeout = jiffies + msecs_to_jiffies(30);
for (uitmp = ~0xc0; !time_after(jiffies, timeout) && uitmp != 0xc0;) {
/* trigger filter */
ret = regmap_write(dev->regmap, 0x2e, 0x09);
if (ret)
goto err;
/* locked when [7:6] are set (val: d7 6MHz, d5 7MHz, cd 8MHz) */
ret = regmap_read(dev->regmap, 0x2f, &uitmp);
if (ret)
goto err;
uitmp &= 0xc0;
ret = regmap_write(dev->regmap, 0x2e, 0x01);
if (ret)
goto err;
}
if (uitmp != 0xc0)
dev_dbg(&client->dev, "filter did not lock %02x\n", uitmp);
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int fc2580_init(struct fc2580_dev *dev)
{
struct i2c_client *client = dev->client;
int ret, i;
dev_dbg(&client->dev, "\n");
for (i = 0; i < ARRAY_SIZE(fc2580_init_reg_vals); i++) {
ret = regmap_write(dev->regmap, fc2580_init_reg_vals[i].reg,
fc2580_init_reg_vals[i].val);
if (ret)
goto err;
}
dev->active = true;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int fc2580_sleep(struct fc2580_dev *dev)
{
struct i2c_client *client = dev->client;
int ret;
dev_dbg(&client->dev, "\n");
dev->active = false;
ret = regmap_write(dev->regmap, 0x02, 0x0a);
if (ret)
goto err;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
/*
* DVB API
*/
static int fc2580_dvb_set_params(struct dvb_frontend *fe)
{
struct fc2580_dev *dev = fe->tuner_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
dev->f_frequency = c->frequency;
dev->f_bandwidth = c->bandwidth_hz;
return fc2580_set_params(dev);
}
static int fc2580_dvb_init(struct dvb_frontend *fe)
{
return fc2580_init(fe->tuner_priv);
}
static int fc2580_dvb_sleep(struct dvb_frontend *fe)
{
return fc2580_sleep(fe->tuner_priv);
}
static int fc2580_dvb_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
*frequency = 0; /* Zero-IF */
return 0;
}
static const struct dvb_tuner_ops fc2580_dvb_tuner_ops = {
.info = {
.name = "FCI FC2580",
.frequency_min_hz = 174 * MHz,
.frequency_max_hz = 862 * MHz,
},
.init = fc2580_dvb_init,
.sleep = fc2580_dvb_sleep,
.set_params = fc2580_dvb_set_params,
.get_if_frequency = fc2580_dvb_get_if_frequency,
};
/*
* V4L2 API
*/
#if IS_ENABLED(CONFIG_VIDEO_V4L2)
static const struct v4l2_frequency_band bands[] = {
{
.type = V4L2_TUNER_RF,
.index = 0,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 130000000,
.rangehigh = 2000000000,
},
};
static inline struct fc2580_dev *fc2580_subdev_to_dev(struct v4l2_subdev *sd)
{
return container_of(sd, struct fc2580_dev, subdev);
}
static int fc2580_standby(struct v4l2_subdev *sd)
{
struct fc2580_dev *dev = fc2580_subdev_to_dev(sd);
int ret;
ret = fc2580_sleep(dev);
if (ret)
return ret;
return fc2580_set_params(dev);
}
static int fc2580_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v)
{
struct fc2580_dev *dev = fc2580_subdev_to_dev(sd);
struct i2c_client *client = dev->client;
dev_dbg(&client->dev, "index=%d\n", v->index);
strscpy(v->name, "FCI FC2580", sizeof(v->name));
v->type = V4L2_TUNER_RF;
v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
v->rangelow = bands[0].rangelow;
v->rangehigh = bands[0].rangehigh;
return 0;
}
static int fc2580_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v)
{
struct fc2580_dev *dev = fc2580_subdev_to_dev(sd);
struct i2c_client *client = dev->client;
dev_dbg(&client->dev, "index=%d\n", v->index);
return 0;
}
static int fc2580_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
{
struct fc2580_dev *dev = fc2580_subdev_to_dev(sd);
struct i2c_client *client = dev->client;
dev_dbg(&client->dev, "tuner=%d\n", f->tuner);
f->frequency = dev->f_frequency;
return 0;
}
static int fc2580_s_frequency(struct v4l2_subdev *sd,
const struct v4l2_frequency *f)
{
struct fc2580_dev *dev = fc2580_subdev_to_dev(sd);
struct i2c_client *client = dev->client;
dev_dbg(&client->dev, "tuner=%d type=%d frequency=%u\n",
f->tuner, f->type, f->frequency);
dev->f_frequency = clamp_t(unsigned int, f->frequency,
bands[0].rangelow, bands[0].rangehigh);
return fc2580_set_params(dev);
}
static int fc2580_enum_freq_bands(struct v4l2_subdev *sd,
struct v4l2_frequency_band *band)
{
struct fc2580_dev *dev = fc2580_subdev_to_dev(sd);
struct i2c_client *client = dev->client;
dev_dbg(&client->dev, "tuner=%d type=%d index=%d\n",
band->tuner, band->type, band->index);
if (band->index >= ARRAY_SIZE(bands))
return -EINVAL;
band->capability = bands[band->index].capability;
band->rangelow = bands[band->index].rangelow;
band->rangehigh = bands[band->index].rangehigh;
return 0;
}
static const struct v4l2_subdev_tuner_ops fc2580_subdev_tuner_ops = {
.standby = fc2580_standby,
.g_tuner = fc2580_g_tuner,
.s_tuner = fc2580_s_tuner,
.g_frequency = fc2580_g_frequency,
.s_frequency = fc2580_s_frequency,
.enum_freq_bands = fc2580_enum_freq_bands,
};
static const struct v4l2_subdev_ops fc2580_subdev_ops = {
.tuner = &fc2580_subdev_tuner_ops,
};
static int fc2580_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct fc2580_dev *dev = container_of(ctrl->handler, struct fc2580_dev, hdl);
struct i2c_client *client = dev->client;
int ret;
dev_dbg(&client->dev, "ctrl: id=%d name=%s cur.val=%d val=%d\n",
ctrl->id, ctrl->name, ctrl->cur.val, ctrl->val);
switch (ctrl->id) {
case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
case V4L2_CID_RF_TUNER_BANDWIDTH:
/*
* TODO: Auto logic does not work 100% correctly as tuner driver
* do not have information to calculate maximum suitable
* bandwidth. Calculating it is responsible of master driver.
*/
dev->f_bandwidth = dev->bandwidth->val;
ret = fc2580_set_params(dev);
break;
default:
dev_dbg(&client->dev, "unknown ctrl");
ret = -EINVAL;
}
return ret;
}
static const struct v4l2_ctrl_ops fc2580_ctrl_ops = {
.s_ctrl = fc2580_s_ctrl,
};
#endif
static struct v4l2_subdev *fc2580_get_v4l2_subdev(struct i2c_client *client)
{
struct fc2580_dev *dev = i2c_get_clientdata(client);
if (dev->subdev.ops)
return &dev->subdev;
else
return NULL;
}
static int fc2580_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct fc2580_dev *dev;
struct fc2580_platform_data *pdata = client->dev.platform_data;
struct dvb_frontend *fe = pdata->dvb_frontend;
int ret;
unsigned int uitmp;
static const struct regmap_config regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
ret = -ENOMEM;
goto err;
}
if (pdata->clk)
dev->clk = pdata->clk;
else
dev->clk = 16384000; /* internal clock */
dev->client = client;
dev->regmap = devm_regmap_init_i2c(client, &regmap_config);
if (IS_ERR(dev->regmap)) {
ret = PTR_ERR(dev->regmap);
goto err_kfree;
}
/* check if the tuner is there */
ret = regmap_read(dev->regmap, 0x01, &uitmp);
if (ret)
goto err_kfree;
dev_dbg(&client->dev, "chip_id=%02x\n", uitmp);
switch (uitmp) {
case 0x56:
case 0x5a:
break;
default:
ret = -ENODEV;
goto err_kfree;
}
#if IS_ENABLED(CONFIG_VIDEO_V4L2)
/* Register controls */
v4l2_ctrl_handler_init(&dev->hdl, 2);
dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &fc2580_ctrl_ops,
V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
0, 1, 1, 1);
dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &fc2580_ctrl_ops,
V4L2_CID_RF_TUNER_BANDWIDTH,
3000, 10000000, 1, 3000);
v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
if (dev->hdl.error) {
ret = dev->hdl.error;
dev_err(&client->dev, "Could not initialize controls\n");
v4l2_ctrl_handler_free(&dev->hdl);
goto err_kfree;
}
dev->subdev.ctrl_handler = &dev->hdl;
dev->f_frequency = bands[0].rangelow;
dev->f_bandwidth = dev->bandwidth->val;
v4l2_i2c_subdev_init(&dev->subdev, client, &fc2580_subdev_ops);
#endif
fe->tuner_priv = dev;
memcpy(&fe->ops.tuner_ops, &fc2580_dvb_tuner_ops,
sizeof(fe->ops.tuner_ops));
pdata->get_v4l2_subdev = fc2580_get_v4l2_subdev;
i2c_set_clientdata(client, dev);
dev_info(&client->dev, "FCI FC2580 successfully identified\n");
return 0;
err_kfree:
kfree(dev);
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int fc2580_remove(struct i2c_client *client)
{
struct fc2580_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
#if IS_ENABLED(CONFIG_VIDEO_V4L2)
v4l2_ctrl_handler_free(&dev->hdl);
#endif
kfree(dev);
return 0;
}
static const struct i2c_device_id fc2580_id_table[] = {
{"fc2580", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, fc2580_id_table);
static struct i2c_driver fc2580_driver = {
.driver = {
.name = "fc2580",
.suppress_bind_attrs = true,
},
.probe = fc2580_probe,
.remove = fc2580_remove,
.id_table = fc2580_id_table,
};
module_i2c_driver(fc2580_driver);
MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");
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