// SPDX-License-Identifier: GPL-2.0-or-later
/*
* FCI FC2580 silicon tuner driver
*
* Copyright (C) 2012 Antti Palosaari <[email protected]>
*/
#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_DEV)
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)
{
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, ®map_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_DEV)
/* 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 void fc2580_remove(struct i2c_client *client)
{
struct fc2580_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
#if IS_ENABLED(CONFIG_VIDEO_DEV)
v4l2_ctrl_handler_free(&dev->hdl);
#endif
kfree(dev);
}
static const struct i2c_device_id fc2580_id_table[] = {
{ "fc2580" },
{}
};
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 <[email protected]>");
MODULE_LICENSE("GPL");
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