summaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb-frontends/ts2020.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/dvb-frontends/ts2020.c')
-rw-r--r--drivers/media/dvb-frontends/ts2020.c733
1 files changed, 733 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/ts2020.c b/drivers/media/dvb-frontends/ts2020.c
new file mode 100644
index 000000000..2f64f1a8b
--- /dev/null
+++ b/drivers/media/dvb-frontends/ts2020.c
@@ -0,0 +1,733 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ Montage Technology TS2020 - Silicon Tuner driver
+ Copyright (C) 2009-2012 Konstantin Dimitrov <kosio.dimitrov@gmail.com>
+
+ Copyright (C) 2009-2012 TurboSight.com
+
+ */
+
+#include <media/dvb_frontend.h>
+#include "ts2020.h"
+#include <linux/regmap.h>
+#include <linux/math64.h>
+
+#define TS2020_XTAL_FREQ 27000 /* in kHz */
+#define FREQ_OFFSET_LOW_SYM_RATE 3000
+
+struct ts2020_priv {
+ struct i2c_client *client;
+ struct mutex regmap_mutex;
+ struct regmap_config regmap_config;
+ struct regmap *regmap;
+ struct dvb_frontend *fe;
+ struct delayed_work stat_work;
+ int (*get_agc_pwm)(struct dvb_frontend *fe, u8 *_agc_pwm);
+ /* i2c details */
+ struct i2c_adapter *i2c;
+ int i2c_address;
+ bool loop_through:1;
+ u8 clk_out:2;
+ u8 clk_out_div:5;
+ bool dont_poll:1;
+ u32 frequency_div; /* LO output divider switch frequency */
+ u32 frequency_khz; /* actual used LO frequency */
+#define TS2020_M88TS2020 0
+#define TS2020_M88TS2022 1
+ u8 tuner;
+};
+
+struct ts2020_reg_val {
+ u8 reg;
+ u8 val;
+};
+
+static void ts2020_stat_work(struct work_struct *work);
+
+static void ts2020_release(struct dvb_frontend *fe)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ struct i2c_client *client = priv->client;
+
+ dev_dbg(&client->dev, "\n");
+
+ i2c_unregister_device(client);
+}
+
+static int ts2020_sleep(struct dvb_frontend *fe)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ int ret;
+ u8 u8tmp;
+
+ if (priv->tuner == TS2020_M88TS2020)
+ u8tmp = 0x0a; /* XXX: probably wrong */
+ else
+ u8tmp = 0x00;
+
+ ret = regmap_write(priv->regmap, u8tmp, 0x00);
+ if (ret < 0)
+ return ret;
+
+ /* stop statistics polling */
+ if (!priv->dont_poll)
+ cancel_delayed_work_sync(&priv->stat_work);
+ return 0;
+}
+
+static int ts2020_init(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ struct ts2020_priv *priv = fe->tuner_priv;
+ int i;
+ u8 u8tmp;
+
+ if (priv->tuner == TS2020_M88TS2020) {
+ regmap_write(priv->regmap, 0x42, 0x73);
+ regmap_write(priv->regmap, 0x05, priv->clk_out_div);
+ regmap_write(priv->regmap, 0x20, 0x27);
+ regmap_write(priv->regmap, 0x07, 0x02);
+ regmap_write(priv->regmap, 0x11, 0xff);
+ regmap_write(priv->regmap, 0x60, 0xf9);
+ regmap_write(priv->regmap, 0x08, 0x01);
+ regmap_write(priv->regmap, 0x00, 0x41);
+ } else {
+ static const struct ts2020_reg_val reg_vals[] = {
+ {0x7d, 0x9d},
+ {0x7c, 0x9a},
+ {0x7a, 0x76},
+ {0x3b, 0x01},
+ {0x63, 0x88},
+ {0x61, 0x85},
+ {0x22, 0x30},
+ {0x30, 0x40},
+ {0x20, 0x23},
+ {0x24, 0x02},
+ {0x12, 0xa0},
+ };
+
+ regmap_write(priv->regmap, 0x00, 0x01);
+ regmap_write(priv->regmap, 0x00, 0x03);
+
+ switch (priv->clk_out) {
+ case TS2020_CLK_OUT_DISABLED:
+ u8tmp = 0x60;
+ break;
+ case TS2020_CLK_OUT_ENABLED:
+ u8tmp = 0x70;
+ regmap_write(priv->regmap, 0x05, priv->clk_out_div);
+ break;
+ case TS2020_CLK_OUT_ENABLED_XTALOUT:
+ u8tmp = 0x6c;
+ break;
+ default:
+ u8tmp = 0x60;
+ break;
+ }
+
+ regmap_write(priv->regmap, 0x42, u8tmp);
+
+ if (priv->loop_through)
+ u8tmp = 0xec;
+ else
+ u8tmp = 0x6c;
+
+ regmap_write(priv->regmap, 0x62, u8tmp);
+
+ for (i = 0; i < ARRAY_SIZE(reg_vals); i++)
+ regmap_write(priv->regmap, reg_vals[i].reg,
+ reg_vals[i].val);
+ }
+
+ /* Initialise v5 stats here */
+ c->strength.len = 1;
+ c->strength.stat[0].scale = FE_SCALE_DECIBEL;
+ c->strength.stat[0].uvalue = 0;
+
+ /* Start statistics polling by invoking the work function */
+ ts2020_stat_work(&priv->stat_work.work);
+ return 0;
+}
+
+static int ts2020_tuner_gate_ctrl(struct dvb_frontend *fe, u8 offset)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ int ret;
+ ret = regmap_write(priv->regmap, 0x51, 0x1f - offset);
+ ret |= regmap_write(priv->regmap, 0x51, 0x1f);
+ ret |= regmap_write(priv->regmap, 0x50, offset);
+ ret |= regmap_write(priv->regmap, 0x50, 0x00);
+ msleep(20);
+ return ret;
+}
+
+static int ts2020_set_tuner_rf(struct dvb_frontend *fe)
+{
+ struct ts2020_priv *dev = fe->tuner_priv;
+ int ret;
+ unsigned int utmp;
+
+ ret = regmap_read(dev->regmap, 0x3d, &utmp);
+ if (ret)
+ return ret;
+
+ utmp &= 0x7f;
+ if (utmp < 0x16)
+ utmp = 0xa1;
+ else if (utmp == 0x16)
+ utmp = 0x99;
+ else
+ utmp = 0xf9;
+
+ regmap_write(dev->regmap, 0x60, utmp);
+ ret = ts2020_tuner_gate_ctrl(fe, 0x08);
+
+ return ret;
+}
+
+static int ts2020_set_params(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ struct ts2020_priv *priv = fe->tuner_priv;
+ int ret;
+ unsigned int utmp;
+ u32 f3db, gdiv28;
+ u16 u16tmp, value, lpf_coeff;
+ u8 buf[3], reg10, lpf_mxdiv, mlpf_max, mlpf_min, nlpf;
+ unsigned int f_ref_khz, f_vco_khz, div_ref, div_out, pll_n;
+ unsigned int frequency_khz = c->frequency;
+
+ /*
+ * Integer-N PLL synthesizer
+ * kHz is used for all calculations to keep calculations within 32-bit
+ */
+ f_ref_khz = TS2020_XTAL_FREQ;
+ div_ref = DIV_ROUND_CLOSEST(f_ref_khz, 2000);
+
+ /* select LO output divider */
+ if (frequency_khz < priv->frequency_div) {
+ div_out = 4;
+ reg10 = 0x10;
+ } else {
+ div_out = 2;
+ reg10 = 0x00;
+ }
+
+ f_vco_khz = frequency_khz * div_out;
+ pll_n = f_vco_khz * div_ref / f_ref_khz;
+ pll_n += pll_n % 2;
+ priv->frequency_khz = pll_n * f_ref_khz / div_ref / div_out;
+
+ pr_debug("frequency=%u offset=%d f_vco_khz=%u pll_n=%u div_ref=%u div_out=%u\n",
+ priv->frequency_khz, priv->frequency_khz - c->frequency,
+ f_vco_khz, pll_n, div_ref, div_out);
+
+ if (priv->tuner == TS2020_M88TS2020) {
+ lpf_coeff = 2766;
+ reg10 |= 0x01;
+ ret = regmap_write(priv->regmap, 0x10, reg10);
+ } else {
+ lpf_coeff = 3200;
+ reg10 |= 0x0b;
+ ret = regmap_write(priv->regmap, 0x10, reg10);
+ ret |= regmap_write(priv->regmap, 0x11, 0x40);
+ }
+
+ u16tmp = pll_n - 1024;
+ buf[0] = (u16tmp >> 8) & 0xff;
+ buf[1] = (u16tmp >> 0) & 0xff;
+ buf[2] = div_ref - 8;
+
+ ret |= regmap_write(priv->regmap, 0x01, buf[0]);
+ ret |= regmap_write(priv->regmap, 0x02, buf[1]);
+ ret |= regmap_write(priv->regmap, 0x03, buf[2]);
+
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x10);
+ if (ret < 0)
+ return -ENODEV;
+
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x08);
+
+ /* Tuner RF */
+ if (priv->tuner == TS2020_M88TS2020)
+ ret |= ts2020_set_tuner_rf(fe);
+
+ gdiv28 = (TS2020_XTAL_FREQ / 1000 * 1694 + 500) / 1000;
+ ret |= regmap_write(priv->regmap, 0x04, gdiv28 & 0xff);
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x04);
+ if (ret < 0)
+ return -ENODEV;
+
+ if (priv->tuner == TS2020_M88TS2022) {
+ ret = regmap_write(priv->regmap, 0x25, 0x00);
+ ret |= regmap_write(priv->regmap, 0x27, 0x70);
+ ret |= regmap_write(priv->regmap, 0x41, 0x09);
+ ret |= regmap_write(priv->regmap, 0x08, 0x0b);
+ if (ret < 0)
+ return -ENODEV;
+ }
+
+ regmap_read(priv->regmap, 0x26, &utmp);
+ value = utmp;
+
+ f3db = (c->bandwidth_hz / 1000 / 2) + 2000;
+ f3db += FREQ_OFFSET_LOW_SYM_RATE; /* FIXME: ~always too wide filter */
+ f3db = clamp(f3db, 7000U, 40000U);
+
+ gdiv28 = gdiv28 * 207 / (value * 2 + 151);
+ mlpf_max = gdiv28 * 135 / 100;
+ mlpf_min = gdiv28 * 78 / 100;
+ if (mlpf_max > 63)
+ mlpf_max = 63;
+
+ nlpf = (f3db * gdiv28 * 2 / lpf_coeff /
+ (TS2020_XTAL_FREQ / 1000) + 1) / 2;
+ if (nlpf > 23)
+ nlpf = 23;
+ if (nlpf < 1)
+ nlpf = 1;
+
+ lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000)
+ * lpf_coeff * 2 / f3db + 1) / 2;
+
+ if (lpf_mxdiv < mlpf_min) {
+ nlpf++;
+ lpf_mxdiv = (nlpf * (TS2020_XTAL_FREQ / 1000)
+ * lpf_coeff * 2 / f3db + 1) / 2;
+ }
+
+ if (lpf_mxdiv > mlpf_max)
+ lpf_mxdiv = mlpf_max;
+
+ ret = regmap_write(priv->regmap, 0x04, lpf_mxdiv);
+ ret |= regmap_write(priv->regmap, 0x06, nlpf);
+
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x04);
+
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x01);
+
+ msleep(80);
+
+ return (ret < 0) ? -EINVAL : 0;
+}
+
+static int ts2020_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+
+ *frequency = priv->frequency_khz;
+ return 0;
+}
+
+static int ts2020_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ *frequency = 0; /* Zero-IF */
+ return 0;
+}
+
+/*
+ * Get the tuner gain.
+ * @fe: The front end for which we're determining the gain
+ * @v_agc: The voltage of the AGC from the demodulator (0-2600mV)
+ * @_gain: Where to store the gain (in 0.001dB units)
+ *
+ * Returns 0 or a negative error code.
+ */
+static int ts2020_read_tuner_gain(struct dvb_frontend *fe, unsigned v_agc,
+ __s64 *_gain)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ unsigned long gain1, gain2, gain3;
+ unsigned utmp;
+ int ret;
+
+ /* Read the RF gain */
+ ret = regmap_read(priv->regmap, 0x3d, &utmp);
+ if (ret < 0)
+ return ret;
+ gain1 = utmp & 0x1f;
+
+ /* Read the baseband gain */
+ ret = regmap_read(priv->regmap, 0x21, &utmp);
+ if (ret < 0)
+ return ret;
+ gain2 = utmp & 0x1f;
+
+ switch (priv->tuner) {
+ case TS2020_M88TS2020:
+ gain1 = clamp_t(long, gain1, 0, 15);
+ gain2 = clamp_t(long, gain2, 0, 13);
+ v_agc = clamp_t(long, v_agc, 400, 1100);
+
+ *_gain = -((__s64)gain1 * 2330 +
+ gain2 * 3500 +
+ v_agc * 24 / 10 * 10 +
+ 10000);
+ /* gain in range -19600 to -116850 in units of 0.001dB */
+ break;
+
+ case TS2020_M88TS2022:
+ ret = regmap_read(priv->regmap, 0x66, &utmp);
+ if (ret < 0)
+ return ret;
+ gain3 = (utmp >> 3) & 0x07;
+
+ gain1 = clamp_t(long, gain1, 0, 15);
+ gain2 = clamp_t(long, gain2, 2, 16);
+ gain3 = clamp_t(long, gain3, 0, 6);
+ v_agc = clamp_t(long, v_agc, 600, 1600);
+
+ *_gain = -((__s64)gain1 * 2650 +
+ gain2 * 3380 +
+ gain3 * 2850 +
+ v_agc * 176 / 100 * 10 -
+ 30000);
+ /* gain in range -47320 to -158950 in units of 0.001dB */
+ break;
+ }
+
+ return 0;
+}
+
+/*
+ * Get the AGC information from the demodulator and use that to calculate the
+ * tuner gain.
+ */
+static int ts2020_get_tuner_gain(struct dvb_frontend *fe, __s64 *_gain)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ int v_agc = 0, ret;
+ u8 agc_pwm;
+
+ /* Read the AGC PWM rate from the demodulator */
+ if (priv->get_agc_pwm) {
+ ret = priv->get_agc_pwm(fe, &agc_pwm);
+ if (ret < 0)
+ return ret;
+
+ switch (priv->tuner) {
+ case TS2020_M88TS2020:
+ v_agc = (int)agc_pwm * 20 - 1166;
+ break;
+ case TS2020_M88TS2022:
+ v_agc = (int)agc_pwm * 16 - 670;
+ break;
+ }
+
+ if (v_agc < 0)
+ v_agc = 0;
+ }
+
+ return ts2020_read_tuner_gain(fe, v_agc, _gain);
+}
+
+/*
+ * Gather statistics on a regular basis
+ */
+static void ts2020_stat_work(struct work_struct *work)
+{
+ struct ts2020_priv *priv = container_of(work, struct ts2020_priv,
+ stat_work.work);
+ struct i2c_client *client = priv->client;
+ struct dtv_frontend_properties *c = &priv->fe->dtv_property_cache;
+ int ret;
+
+ dev_dbg(&client->dev, "\n");
+
+ ret = ts2020_get_tuner_gain(priv->fe, &c->strength.stat[0].svalue);
+ if (ret < 0)
+ goto err;
+
+ c->strength.stat[0].scale = FE_SCALE_DECIBEL;
+
+ if (!priv->dont_poll)
+ schedule_delayed_work(&priv->stat_work, msecs_to_jiffies(2000));
+ return;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+}
+
+/*
+ * Read TS2020 signal strength in v3 format.
+ */
+static int ts2020_read_signal_strength(struct dvb_frontend *fe,
+ u16 *_signal_strength)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+ struct ts2020_priv *priv = fe->tuner_priv;
+ unsigned strength;
+ __s64 gain;
+
+ if (priv->dont_poll)
+ ts2020_stat_work(&priv->stat_work.work);
+
+ if (c->strength.stat[0].scale == FE_SCALE_NOT_AVAILABLE) {
+ *_signal_strength = 0;
+ return 0;
+ }
+
+ gain = c->strength.stat[0].svalue;
+
+ /* Calculate the signal strength based on the total gain of the tuner */
+ if (gain < -85000)
+ /* 0%: no signal or weak signal */
+ strength = 0;
+ else if (gain < -65000)
+ /* 0% - 60%: weak signal */
+ strength = 0 + div64_s64((85000 + gain) * 3, 1000);
+ else if (gain < -45000)
+ /* 60% - 90%: normal signal */
+ strength = 60 + div64_s64((65000 + gain) * 3, 2000);
+ else
+ /* 90% - 99%: strong signal */
+ strength = 90 + div64_s64((45000 + gain), 5000);
+
+ *_signal_strength = strength * 65535 / 100;
+ return 0;
+}
+
+static const struct dvb_tuner_ops ts2020_tuner_ops = {
+ .info = {
+ .name = "TS2020",
+ .frequency_min_hz = 950 * MHz,
+ .frequency_max_hz = 2150 * MHz
+ },
+ .init = ts2020_init,
+ .release = ts2020_release,
+ .sleep = ts2020_sleep,
+ .set_params = ts2020_set_params,
+ .get_frequency = ts2020_get_frequency,
+ .get_if_frequency = ts2020_get_if_frequency,
+ .get_rf_strength = ts2020_read_signal_strength,
+};
+
+struct dvb_frontend *ts2020_attach(struct dvb_frontend *fe,
+ const struct ts2020_config *config,
+ struct i2c_adapter *i2c)
+{
+ struct i2c_client *client;
+ struct i2c_board_info board_info;
+
+ /* This is only used by ts2020_probe() so can be on the stack */
+ struct ts2020_config pdata;
+
+ memcpy(&pdata, config, sizeof(pdata));
+ pdata.fe = fe;
+ pdata.attach_in_use = true;
+
+ memset(&board_info, 0, sizeof(board_info));
+ strscpy(board_info.type, "ts2020", I2C_NAME_SIZE);
+ board_info.addr = config->tuner_address;
+ board_info.platform_data = &pdata;
+ client = i2c_new_client_device(i2c, &board_info);
+ if (!i2c_client_has_driver(client))
+ return NULL;
+
+ return fe;
+}
+EXPORT_SYMBOL_GPL(ts2020_attach);
+
+/*
+ * We implement own regmap locking due to legacy DVB attach which uses frontend
+ * gate control callback to control I2C bus access. We can open / close gate and
+ * serialize whole open / I2C-operation / close sequence at the same.
+ */
+static void ts2020_regmap_lock(void *__dev)
+{
+ struct ts2020_priv *dev = __dev;
+
+ mutex_lock(&dev->regmap_mutex);
+ if (dev->fe->ops.i2c_gate_ctrl)
+ dev->fe->ops.i2c_gate_ctrl(dev->fe, 1);
+}
+
+static void ts2020_regmap_unlock(void *__dev)
+{
+ struct ts2020_priv *dev = __dev;
+
+ if (dev->fe->ops.i2c_gate_ctrl)
+ dev->fe->ops.i2c_gate_ctrl(dev->fe, 0);
+ mutex_unlock(&dev->regmap_mutex);
+}
+
+static int ts2020_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ts2020_config *pdata = client->dev.platform_data;
+ struct dvb_frontend *fe = pdata->fe;
+ struct ts2020_priv *dev;
+ int ret;
+ u8 u8tmp;
+ unsigned int utmp;
+ char *chip_str;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /* create regmap */
+ mutex_init(&dev->regmap_mutex);
+ dev->regmap_config.reg_bits = 8;
+ dev->regmap_config.val_bits = 8;
+ dev->regmap_config.lock = ts2020_regmap_lock;
+ dev->regmap_config.unlock = ts2020_regmap_unlock;
+ dev->regmap_config.lock_arg = dev;
+ dev->regmap = regmap_init_i2c(client, &dev->regmap_config);
+ if (IS_ERR(dev->regmap)) {
+ ret = PTR_ERR(dev->regmap);
+ goto err_kfree;
+ }
+
+ dev->i2c = client->adapter;
+ dev->i2c_address = client->addr;
+ dev->loop_through = pdata->loop_through;
+ dev->clk_out = pdata->clk_out;
+ dev->clk_out_div = pdata->clk_out_div;
+ dev->dont_poll = pdata->dont_poll;
+ dev->frequency_div = pdata->frequency_div;
+ dev->fe = fe;
+ dev->get_agc_pwm = pdata->get_agc_pwm;
+ fe->tuner_priv = dev;
+ dev->client = client;
+ INIT_DELAYED_WORK(&dev->stat_work, ts2020_stat_work);
+
+ /* check if the tuner is there */
+ ret = regmap_read(dev->regmap, 0x00, &utmp);
+ if (ret)
+ goto err_regmap_exit;
+
+ if ((utmp & 0x03) == 0x00) {
+ ret = regmap_write(dev->regmap, 0x00, 0x01);
+ if (ret)
+ goto err_regmap_exit;
+
+ usleep_range(2000, 50000);
+ }
+
+ ret = regmap_write(dev->regmap, 0x00, 0x03);
+ if (ret)
+ goto err_regmap_exit;
+
+ usleep_range(2000, 50000);
+
+ ret = regmap_read(dev->regmap, 0x00, &utmp);
+ if (ret)
+ goto err_regmap_exit;
+
+ dev_dbg(&client->dev, "chip_id=%02x\n", utmp);
+
+ switch (utmp) {
+ case 0x01:
+ case 0x41:
+ case 0x81:
+ dev->tuner = TS2020_M88TS2020;
+ chip_str = "TS2020";
+ if (!dev->frequency_div)
+ dev->frequency_div = 1060000;
+ break;
+ case 0xc3:
+ case 0x83:
+ dev->tuner = TS2020_M88TS2022;
+ chip_str = "TS2022";
+ if (!dev->frequency_div)
+ dev->frequency_div = 1103000;
+ break;
+ default:
+ ret = -ENODEV;
+ goto err_regmap_exit;
+ }
+
+ if (dev->tuner == TS2020_M88TS2022) {
+ switch (dev->clk_out) {
+ case TS2020_CLK_OUT_DISABLED:
+ u8tmp = 0x60;
+ break;
+ case TS2020_CLK_OUT_ENABLED:
+ u8tmp = 0x70;
+ ret = regmap_write(dev->regmap, 0x05, dev->clk_out_div);
+ if (ret)
+ goto err_regmap_exit;
+ break;
+ case TS2020_CLK_OUT_ENABLED_XTALOUT:
+ u8tmp = 0x6c;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err_regmap_exit;
+ }
+
+ ret = regmap_write(dev->regmap, 0x42, u8tmp);
+ if (ret)
+ goto err_regmap_exit;
+
+ if (dev->loop_through)
+ u8tmp = 0xec;
+ else
+ u8tmp = 0x6c;
+
+ ret = regmap_write(dev->regmap, 0x62, u8tmp);
+ if (ret)
+ goto err_regmap_exit;
+ }
+
+ /* sleep */
+ ret = regmap_write(dev->regmap, 0x00, 0x00);
+ if (ret)
+ goto err_regmap_exit;
+
+ dev_info(&client->dev,
+ "Montage Technology %s successfully identified\n", chip_str);
+
+ memcpy(&fe->ops.tuner_ops, &ts2020_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+ if (!pdata->attach_in_use)
+ fe->ops.tuner_ops.release = NULL;
+
+ i2c_set_clientdata(client, dev);
+ return 0;
+err_regmap_exit:
+ regmap_exit(dev->regmap);
+err_kfree:
+ kfree(dev);
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static void ts2020_remove(struct i2c_client *client)
+{
+ struct ts2020_priv *dev = i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "\n");
+
+ /* stop statistics polling */
+ if (!dev->dont_poll)
+ cancel_delayed_work_sync(&dev->stat_work);
+
+ regmap_exit(dev->regmap);
+ kfree(dev);
+}
+
+static const struct i2c_device_id ts2020_id_table[] = {
+ {"ts2020", 0},
+ {"ts2022", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ts2020_id_table);
+
+static struct i2c_driver ts2020_driver = {
+ .driver = {
+ .name = "ts2020",
+ },
+ .probe = ts2020_probe,
+ .remove = ts2020_remove,
+ .id_table = ts2020_id_table,
+};
+
+module_i2c_driver(ts2020_driver);
+
+MODULE_AUTHOR("Konstantin Dimitrov <kosio.dimitrov@gmail.com>");
+MODULE_DESCRIPTION("Montage Technology TS2020 - Silicon tuner driver module");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 04:56:52 +0000