--- /dev/null
+/*
+ Montage Technology TS2020 - Silicon Tuner driver
+ Copyright (C) 2009-2012 Konstantin Dimitrov <kosio.dimitrov@gmail.com>
+
+ Copyright (C) 2009-2012 TurboSight.com
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "dvb_frontend.h"
+#include "ts2020.h"
+
+#define TS2020_XTAL_FREQ 27000 /* in kHz */
+#define FREQ_OFFSET_LOW_SYM_RATE 3000
+
+struct ts2020_priv {
+ struct dvb_frontend *fe;
+ /* i2c details */
+ int i2c_address;
+ struct i2c_adapter *i2c;
+ u8 clk_out:2;
+ u8 clk_out_div:5;
+ u32 frequency;
+ u32 frequency_div;
+#define TS2020_M88TS2020 0
+#define TS2020_M88TS2022 1
+ u8 tuner;
+ u8 loop_through:1;
+};
+
+struct ts2020_reg_val {
+ u8 reg;
+ u8 val;
+};
+
+static int ts2020_release(struct dvb_frontend *fe)
+{
+ kfree(fe->tuner_priv);
+ fe->tuner_priv = NULL;
+ return 0;
+}
+
+static int ts2020_writereg(struct dvb_frontend *fe, int reg, int data)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ u8 buf[] = { reg, data };
+ struct i2c_msg msg[] = {
+ {
+ .addr = priv->i2c_address,
+ .flags = 0,
+ .buf = buf,
+ .len = 2
+ }
+ };
+ int err;
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ err = i2c_transfer(priv->i2c, msg, 1);
+ if (err != 1) {
+ printk(KERN_ERR
+ "%s: writereg error(err == %i, reg == 0x%02x, value == 0x%02x)\n",
+ __func__, err, reg, data);
+ return -EREMOTEIO;
+ }
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+ return 0;
+}
+
+static int ts2020_readreg(struct dvb_frontend *fe, u8 reg)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ int ret;
+ u8 b0[] = { reg };
+ u8 b1[] = { 0 };
+ struct i2c_msg msg[] = {
+ {
+ .addr = priv->i2c_address,
+ .flags = 0,
+ .buf = b0,
+ .len = 1
+ }, {
+ .addr = priv->i2c_address,
+ .flags = I2C_M_RD,
+ .buf = b1,
+ .len = 1
+ }
+ };
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ ret = i2c_transfer(priv->i2c, msg, 2);
+
+ if (ret != 2) {
+ printk(KERN_ERR "%s: reg=0x%x(error=%d)\n",
+ __func__, reg, ret);
+ return ret;
+ }
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+
+ return b1[0];
+}
+
+static int ts2020_sleep(struct dvb_frontend *fe)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ u8 u8tmp;
+
+ if (priv->tuner == TS2020_M88TS2020)
+ u8tmp = 0x0a; /* XXX: probably wrong */
+ else
+ u8tmp = 0x00;
+
+ return ts2020_writereg(fe, u8tmp, 0x00);
+}
+
+static int ts2020_init(struct dvb_frontend *fe)
+{
+ struct ts2020_priv *priv = fe->tuner_priv;
+ int i;
+ u8 u8tmp;
+
+ if (priv->tuner == TS2020_M88TS2020) {
+ ts2020_writereg(fe, 0x42, 0x73);
+ ts2020_writereg(fe, 0x05, priv->clk_out_div);
+ ts2020_writereg(fe, 0x20, 0x27);
+ ts2020_writereg(fe, 0x07, 0x02);
+ ts2020_writereg(fe, 0x11, 0xff);
+ ts2020_writereg(fe, 0x60, 0xf9);
+ ts2020_writereg(fe, 0x08, 0x01);
+ ts2020_writereg(fe, 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},
+ };
+
+ ts2020_writereg(fe, 0x00, 0x01);
+ ts2020_writereg(fe, 0x00, 0x03);
+
+ switch (priv->clk_out) {
+ case TS2020_CLK_OUT_DISABLED:
+ u8tmp = 0x60;
+ break;
+ case TS2020_CLK_OUT_ENABLED:
+ u8tmp = 0x70;
+ ts2020_writereg(fe, 0x05, priv->clk_out_div);
+ break;
+ case TS2020_CLK_OUT_ENABLED_XTALOUT:
+ u8tmp = 0x6c;
+ break;
+ default:
+ u8tmp = 0x60;
+ break;
+ }
+
+ ts2020_writereg(fe, 0x42, u8tmp);
+
+ if (priv->loop_through)
+ u8tmp = 0xec;
+ else
+ u8tmp = 0x6c;
+
+ ts2020_writereg(fe, 0x62, u8tmp);
+
+ for (i = 0; i < ARRAY_SIZE(reg_vals); i++)
+ ts2020_writereg(fe, reg_vals[i].reg, reg_vals[i].val);
+ }
+
+ return 0;
+}
+
+static int ts2020_tuner_gate_ctrl(struct dvb_frontend *fe, u8 offset)
+{
+ int ret;
+ ret = ts2020_writereg(fe, 0x51, 0x1f - offset);
+ ret |= ts2020_writereg(fe, 0x51, 0x1f);
+ ret |= ts2020_writereg(fe, 0x50, offset);
+ ret |= ts2020_writereg(fe, 0x50, 0x00);
+ msleep(20);
+ return ret;
+}
+
+static int ts2020_set_tuner_rf(struct dvb_frontend *fe)
+{
+ int reg;
+
+ reg = ts2020_readreg(fe, 0x3d);
+ reg &= 0x7f;
+ if (reg < 0x16)
+ reg = 0xa1;
+ else if (reg == 0x16)
+ reg = 0x99;
+ else
+ reg = 0xf9;
+
+ ts2020_writereg(fe, 0x60, reg);
+ reg = ts2020_tuner_gate_ctrl(fe, 0x08);
+
+ return reg;
+}
+
+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;
+ u32 frequency = c->frequency;
+ s32 offset_khz;
+ u32 symbol_rate = (c->symbol_rate / 1000);
+ u32 f3db, gdiv28;
+ u16 value, ndiv, lpf_coeff;
+ u8 lpf_mxdiv, mlpf_max, mlpf_min, nlpf;
+ u8 lo = 0x01, div4 = 0x0;
+
+ /* Calculate frequency divider */
+ if (frequency < priv->frequency_div) {
+ lo |= 0x10;
+ div4 = 0x1;
+ ndiv = (frequency * 14 * 4) / TS2020_XTAL_FREQ;
+ } else
+ ndiv = (frequency * 14 * 2) / TS2020_XTAL_FREQ;
+ ndiv = ndiv + ndiv % 2;
+ ndiv = ndiv - 1024;
+
+ if (priv->tuner == TS2020_M88TS2020) {
+ lpf_coeff = 2766;
+ ret = ts2020_writereg(fe, 0x10, 0x80 | lo);
+ } else {
+ lpf_coeff = 3200;
+ ret = ts2020_writereg(fe, 0x10, 0x0b);
+ ret |= ts2020_writereg(fe, 0x11, 0x40);
+ }
+
+ /* Set frequency divider */
+ ret |= ts2020_writereg(fe, 0x01, (ndiv >> 8) & 0xf);
+ ret |= ts2020_writereg(fe, 0x02, ndiv & 0xff);
+
+ ret |= ts2020_writereg(fe, 0x03, 0x06);
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x10);
+ if (ret < 0)
+ return -ENODEV;
+
+ /* Tuner Frequency Range */
+ ret = ts2020_writereg(fe, 0x10, lo);
+
+ 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 |= ts2020_writereg(fe, 0x04, gdiv28 & 0xff);
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x04);
+ if (ret < 0)
+ return -ENODEV;
+
+ if (priv->tuner == TS2020_M88TS2022) {
+ ret = ts2020_writereg(fe, 0x25, 0x00);
+ ret |= ts2020_writereg(fe, 0x27, 0x70);
+ ret |= ts2020_writereg(fe, 0x41, 0x09);
+ ret |= ts2020_writereg(fe, 0x08, 0x0b);
+ if (ret < 0)
+ return -ENODEV;
+ }
+
+ value = ts2020_readreg(fe, 0x26);
+
+ f3db = (symbol_rate * 135) / 200 + 2000;
+ f3db += FREQ_OFFSET_LOW_SYM_RATE;
+ if (f3db < 7000)
+ f3db = 7000;
+ if (f3db > 40000)
+ f3db = 40000;
+
+ 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 = ts2020_writereg(fe, 0x04, lpf_mxdiv);
+ ret |= ts2020_writereg(fe, 0x06, nlpf);
+
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x04);
+
+ ret |= ts2020_tuner_gate_ctrl(fe, 0x01);
+
+ msleep(80);
+ /* calculate offset assuming 96000kHz*/
+ offset_khz = (ndiv - ndiv % 2 + 1024) * TS2020_XTAL_FREQ
+ / (6 + 8) / (div4 + 1) / 2;
+
+ priv->frequency = offset_khz;
+
+ 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;
+
+ return 0;
+}
+
+static int ts2020_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ *frequency = 0; /* Zero-IF */
+ return 0;
+}
+
+/* read TS2020 signal strength */
+static int ts2020_read_signal_strength(struct dvb_frontend *fe,
+ u16 *signal_strength)
+{
+ u16 sig_reading, sig_strength;
+ u8 rfgain, bbgain;
+
+ rfgain = ts2020_readreg(fe, 0x3d) & 0x1f;
+ bbgain = ts2020_readreg(fe, 0x21) & 0x1f;
+
+ if (rfgain > 15)
+ rfgain = 15;
+ if (bbgain > 13)
+ bbgain = 13;
+
+ sig_reading = rfgain * 2 + bbgain * 3;
+
+ sig_strength = 40 + (64 - sig_reading) * 50 / 64 ;
+
+ /* cook the value to be suitable for szap-s2 human readable output */
+ *signal_strength = sig_strength * 1000;
+
+ return 0;
+}
+
+static struct dvb_tuner_ops ts2020_tuner_ops = {
+ .info = {
+ .name = "TS2020",
+ .frequency_min = 950000,
+ .frequency_max = 2150000
+ },
+ .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 ts2020_priv *priv = NULL;
+ u8 buf;
+
+ priv = kzalloc(sizeof(struct ts2020_priv), GFP_KERNEL);
+ if (priv == NULL)
+ return NULL;
+
+ priv->i2c_address = config->tuner_address;
+ priv->i2c = i2c;
+ priv->clk_out = config->clk_out;
+ priv->clk_out_div = config->clk_out_div;
+ priv->frequency_div = config->frequency_div;
+ priv->fe = fe;
+ fe->tuner_priv = priv;
+
+ if (!priv->frequency_div)
+ priv->frequency_div = 1060000;
+
+ /* Wake Up the tuner */
+ if ((0x03 & ts2020_readreg(fe, 0x00)) == 0x00) {
+ ts2020_writereg(fe, 0x00, 0x01);
+ msleep(2);
+ }
+
+ ts2020_writereg(fe, 0x00, 0x03);
+ msleep(2);
+
+ /* Check the tuner version */
+ buf = ts2020_readreg(fe, 0x00);
+ if ((buf == 0x01) || (buf == 0x41) || (buf == 0x81)) {
+ printk(KERN_INFO "%s: Find tuner TS2020!\n", __func__);
+ priv->tuner = TS2020_M88TS2020;
+ } else if ((buf == 0x83) || (buf == 0xc3)) {
+ printk(KERN_INFO "%s: Find tuner TS2022!\n", __func__);
+ priv->tuner = TS2020_M88TS2022;
+ } else {
+ printk(KERN_ERR "%s: Read tuner reg[0] = %d\n", __func__, buf);
+ kfree(priv);
+ return NULL;
+ }
+
+ memcpy(&fe->ops.tuner_ops, &ts2020_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+
+ return fe;
+}
+EXPORT_SYMBOL(ts2020_attach);
+
+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;
+ }
+
+ dev->i2c = client->adapter;
+ dev->i2c_address = client->addr;
+ dev->clk_out = pdata->clk_out;
+ dev->clk_out_div = pdata->clk_out_div;
+ dev->frequency_div = pdata->frequency_div;
+ dev->fe = fe;
+ fe->tuner_priv = dev;
+
+ /* check if the tuner is there */
+ ret = ts2020_readreg(fe, 0x00);
+ if (ret < 0)
+ goto err;
+ utmp = ret;
+
+ if ((utmp & 0x03) == 0x00) {
+ ret = ts2020_writereg(fe, 0x00, 0x01);
+ if (ret)
+ goto err;
+
+ usleep_range(2000, 50000);
+ }
+
+ ret = ts2020_writereg(fe, 0x00, 0x03);
+ if (ret)
+ goto err;
+
+ usleep_range(2000, 50000);
+
+ ret = ts2020_readreg(fe, 0x00);
+ if (ret < 0)
+ goto err;
+ utmp = ret;
+
+ 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;
+ }
+
+ 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 = ts2020_writereg(fe, 0x05, dev->clk_out_div);
+ if (ret)
+ goto err;
+ break;
+ case TS2020_CLK_OUT_ENABLED_XTALOUT:
+ u8tmp = 0x6c;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = ts2020_writereg(fe, 0x42, u8tmp);
+ if (ret)
+ goto err;
+
+ if (dev->loop_through)
+ u8tmp = 0xec;
+ else
+ u8tmp = 0x6c;
+
+ ret = ts2020_writereg(fe, 0x62, u8tmp);
+ if (ret)
+ goto err;
+ }
+
+ /* sleep */
+ ret = ts2020_writereg(fe, 0x00, 0x00);
+ if (ret)
+ goto err;
+
+ 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));
+ fe->ops.tuner_ops.release = NULL;
+
+ i2c_set_clientdata(client, dev);
+ return 0;
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ kfree(dev);
+ return ret;
+}
+
+static int ts2020_remove(struct i2c_client *client)
+{
+ struct ts2020_priv *dev = i2c_get_clientdata(client);
+ struct dvb_frontend *fe = dev->fe;
+
+ dev_dbg(&client->dev, "\n");
+
+ memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
+ fe->tuner_priv = NULL;
+ kfree(dev);
+
+ return 0;
+}
+
+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 = {
+ .owner = THIS_MODULE,
+ .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");
Code Review / kvmfornfv.git / blobdiff