X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fmedia%2Fdvb-frontends%2Fts2020.c;fp=kernel%2Fdrivers%2Fmedia%2Fdvb-frontends%2Fts2020.c;h=90164a38cd366bd5627140f2dc55d370cd62d7f1;hb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;hp=0000000000000000000000000000000000000000;hpb=98260f3884f4a202f9ca5eabed40b1354c489b29;p=kvmfornfv.git

diff --git a/kernel/drivers/media/dvb-frontends/ts2020.c b/kernel/drivers/media/dvb-frontends/ts2020.c
new file mode 100644
index 000000000..90164a38c
--- /dev/null
+++ b/kernel/drivers/media/dvb-frontends/ts2020.c
@@ -0,0 +1,614 @@
+/*
+    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");