[PATCH] Support for tuner FC0012, revised version 0.4

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Support for tuner Fitipower FC0012, revised version 0.4.
Changes compared to version 0.3:
- write function for multiple bytes at once removed again (because the maximum allowable length of an i2c 
transfer may be different between various demodulators),
- introduction of i2c_gate_ctrl calls,
- usage of pr_debug instead of self designed deb_info,
- corrected setting of priv->frequency. Error spotted by Michael Büsch, thanks very much!
- replaced a few spaces with tabs (superfluous spaces also identified by Michael Büsch),

The patch is against the snapshot linux-media-2012-03-28.

Support for tuner Fitipower FC0012

Signed-off-by: Hans-Frieder Vogt <hfvogt@xxxxxxx>

 drivers/media/common/tuners/Kconfig       |    7 
 drivers/media/common/tuners/Makefile      |    1 
 drivers/media/common/tuners/fc0012-priv.h |   42 +++
 drivers/media/common/tuners/fc0012.c      |  385 ++++++++++++++++++++++++++++++
 drivers/media/common/tuners/fc0012.h      |   49 +++
 5 files changed, 484 insertions(+)

diff -Nupr a/drivers/media/common/tuners/fc0012.c b/drivers/media/common/tuners/fc0012.c
--- a/drivers/media/common/tuners/fc0012.c	1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/media/common/tuners/fc0012.c	2012-04-01 00:16:15.956198248 +0200
@@ -0,0 +1,385 @@
+/*
+ * Fitipower FC0012 tuner driver
+ *
+ * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@xxxxxxx>
+ *
+ * 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 "fc0012.h"
+#include "fc0012-priv.h"
+
+static int fc0012_writereg(struct fc0012_priv *priv, u8 reg, u8 val)
+{
+	u8 buf[2] = {reg, val};
+	struct i2c_msg msg = { .addr = priv->addr,
+		.flags = 0, .buf = buf, .len = 2 };
+
+	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+		err("I2C write reg failed, reg: %02x, val: %02x", reg, val);
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+static int fc0012_readreg(struct fc0012_priv *priv, u8 reg, u8 *val)
+{
+	struct i2c_msg msg[2] = {
+		{ .addr = priv->addr,
+		  .flags = 0, .buf = &reg, .len = 1 },
+		{ .addr = priv->addr,
+		  .flags = I2C_M_RD, .buf = val, .len = 1 },
+	};
+
+	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
+		err("I2C read failed, reg: %02x", reg);
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+static int fc0012_release(struct dvb_frontend *fe)
+{
+	kfree(fe->tuner_priv);
+	fe->tuner_priv = NULL;
+	return 0;
+}
+
+static int fc0012_init(struct dvb_frontend *fe)
+{
+	struct fc0012_priv *priv = fe->tuner_priv;
+	int i, ret = 0;
+	unsigned char reg[] = {
+		0x00,	/* dummy reg. 0 */
+		0x05,	/* reg. 0x01 */
+		0x10,	/* reg. 0x02 */
+		0x00,	/* reg. 0x03 */
+		0x00,	/* reg. 0x04 */
+		0x0a,	/* reg. 0x05 CHECK: correct? */
+		0x00,	/* reg. 0x06: divider 2, VCO slow */ 
+		0x0f,	/* reg. 0x07 */
+		0xff,	/* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256,
+			   Loop Bw 1/8 */
+		0x6e,	/* reg. 0x09: Disable LoopThrough, Enable LoopThrough: 0x6f */
+		0xb8,	/* reg. 0x0a: Disable LO Test Buffer */
+		0x83,	/* reg. 0x0b: Output Clock is same as clock frequency */
+		0xfe,	/* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */
+		0x02,	/* reg. 0x0d: AGC Not Forcing & LNA Forcing, 0x02 for DVB-T */
+		0x00,	/* reg. 0x0e */
+		0x00,	/* reg. 0x0f */
+		0x0d,	/* reg. 0x10 */
+		0x00,	/* reg. 0x11 */
+		0x1f,	/* reg. 0x12: Set to maximum gain */
+		0x90,	/* reg. 0x13: Enable IX2, Set to Middle Gain: 0x08,
+			   Low Gain: 0x00, High Gain: 0x10 */
+		0x00,	/* reg. 0x14 */
+		0x04,	/* reg. 0x15: Enable LNA COMPS */
+	};
+
+	switch (priv->xtal_freq) {
+	case FC_XTAL_27_MHZ:
+	case FC_XTAL_28_8_MHZ:
+		reg[0x07] |= 0x20;
+		break;
+	case FC_XTAL_36_MHZ:
+	default:
+		break;
+	}
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+	for (i = 1; i < sizeof(reg); i++) {
+		ret = fc0012_writereg(priv, i, reg[i]);
+		if (ret)
+			break;
+	}
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+
+	if (ret)
+		pr_debug("%s: failed: %d\n", __func__, ret);
+
+	return ret;
+}
+
+static int fc0012_sleep(struct dvb_frontend *fe)
+{
+	/* nothing to do here */
+	return 0;
+}
+
+static int fc0012_set_params(struct dvb_frontend *fe)
+{
+	struct fc0012_priv *priv = fe->tuner_priv;
+	int i, ret = 0;
+	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+	u32 freq = p->frequency / 1000;
+	u32 delsys = p->delivery_system;
+	unsigned char reg[0x16], am, pm, multi;
+	unsigned long fVCO;
+	unsigned short xtal_freq_khz_2, xin, xdiv;
+	int vco_select = false;
+
+	switch (priv->xtal_freq) {
+	case FC_XTAL_27_MHZ:
+		xtal_freq_khz_2 = 27000 / 2;
+		break;
+	case FC_XTAL_36_MHZ:
+		xtal_freq_khz_2 = 36000 / 2;
+		break;
+	case FC_XTAL_28_8_MHZ:
+	default:
+		xtal_freq_khz_2 = 28800 / 2;
+		break;
+	}
+
+	/* select frequency divider and the frequency of VCO */
+	if (freq * 96 < 3560000) {
+		multi = 96;
+		reg[5] = 0x82;
+		reg[6] = 0x00;
+	} else if (freq * 64 < 3560000) {
+		multi = 64;
+		reg[5] = 0x82;
+		reg[6] = 0x02;
+	} else if (freq * 48 < 3560000) {
+		multi = 48;
+		reg[5] = 0x42;
+		reg[6] = 0x00;
+	} else if (freq * 32 < 3560000) {
+		multi = 32;
+		reg[5] = 0x42;
+		reg[6] = 0x02;
+	} else if (freq * 24 < 3560000) {
+		multi = 24;
+		reg[5] = 0x22;
+		reg[6] = 0x00;
+	} else if (freq * 16 < 3560000) {
+		multi = 16;
+		reg[5] = 0x22;
+		reg[6] = 0x02;
+	} else if (freq * 12 < 3560000) {
+		multi = 12;
+		reg[5] = 0x12;
+		reg[6] = 0x00;
+	} else if (freq * 8 < 3560000) {
+		multi = 8;
+		reg[5] = 0x12;
+		reg[6] = 0x02;
+	} else if (freq * 6 < 3560000) {
+		multi = 6;
+		reg[5] = 0x0a;
+		reg[6] = 0x00;
+	} else {
+		multi = 4;
+		reg[5] = 0x0a;
+		reg[6] = 0x02;
+	}
+
+	fVCO = freq * multi;
+
+	if (fVCO >= 3060000) {
+		reg[6] |= 0x08;
+		vco_select = true;
+	}
+
+	if (freq >= 45000) {
+		/* From divided value (XDIV) determined the FA and FP value */
+		xdiv = (unsigned short)(fVCO / xtal_freq_khz_2);
+		if ((fVCO - xdiv * xtal_freq_khz_2) >= (xtal_freq_khz_2 / 2))
+			xdiv++;
+
+		pm = (unsigned char)(xdiv / 8);
+		am = (unsigned char)(xdiv - (8 * pm));
+
+		if (am < 2) {
+			reg[1] = am + 8;
+			reg[2] = pm - 1;
+		} else {
+			reg[1] = am;
+			reg[2] = pm;
+		}
+	} else {
+		/* fix for frequency less than 45 MHz */
+		reg[1] = 0x06;
+		reg[2] = 0x11;
+	}
+
+	/* fix clock out */
+	reg[6] |= 0x20;
+
+	/* From VCO frequency determines the XIN ( fractional part of Delta
+	   Sigma PLL) and divided value (XDIV) */
+	xin = (unsigned short)(fVCO - (fVCO / xtal_freq_khz_2) * xtal_freq_khz_2);
+	xin = (xin << 15) / xtal_freq_khz_2;
+	if (xin >= 16384)
+		xin += 32768;
+
+	reg[3] = xin >> 8;	/* xin with 9 bit resolution */
+	reg[4] = xin & 0xff;
+
+	if (delsys == SYS_DVBT) {
+		reg[6] &= 0x3f;	/* bits 6 and 7 describe the bandwidth */
+		switch (p->bandwidth_hz) {
+		case 6000000:
+			reg[6] |= 0x80;
+			break;
+		case 7000000:
+			reg[6] |= 0x40;
+			break;
+		case 8000000:
+		default:
+			break;
+		}
+	} else {
+		err("%s: modulation type not supported!\n", __func__);
+		return -EINVAL;
+	}
+
+	/* modified for Realtek demod */
+	reg[5] |= 0x07;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
+
+	for (i = 1; i <= 6; i++) {
+		ret = fc0012_writereg(priv, i, reg[i]);
+		if (ret)
+			goto exit;
+	}
+
+	/* VCO Calibration */
+	ret = fc0012_writereg(priv, 0x0e, 0x80);
+	if (!ret)
+		ret = fc0012_writereg(priv, 0x0e, 0x00);
+	/* VCO Re-Calibration if needed */
+	if (!ret)
+		ret = fc0012_writereg(priv, 0x0e, 0x00);
+
+	if (!ret) {
+		msleep(10);
+		ret = fc0012_readreg(priv, 0x0e, &reg[0x0e]);
+	}
+	if (ret)
+		goto exit;
+
+	/* vco selection */
+	reg[0x0e] &= 0x3f;
+
+	if (vco_select) {
+		if (reg[0x0e] > 0x3c) {
+			reg[6] &= ~0x08;
+			ret = fc0012_writereg(priv, 0x06, reg[6]);
+			if (!ret)
+				ret = fc0012_writereg(priv, 0x0e, 0x80);
+			if (!ret)
+				ret = fc0012_writereg(priv, 0x0e, 0x00);
+		}
+	} else {
+		if (reg[0x0e] < 0x02) {
+			reg[6] |= 0x08;
+			ret = fc0012_writereg(priv, 0x06, reg[6]);
+			if (!ret)
+				ret = fc0012_writereg(priv, 0x0e, 0x80);
+			if (!ret)
+				ret = fc0012_writereg(priv, 0x0e, 0x00);
+		}
+	}
+
+	priv->frequency = p->frequency;
+	priv->bandwidth = p->bandwidth_hz;
+
+exit:
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
+	if (ret)
+		pr_debug("%s: failed: %d\n", __func__, ret);
+	return ret;
+}
+
+static int fc0012_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct fc0012_priv *priv = fe->tuner_priv;
+	*frequency = priv->frequency;
+	return 0;
+}
+
+static int fc0012_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	/* CHECK: always ? */
+	*frequency = 0;
+	return 0;
+}
+
+static int fc0012_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+	struct fc0012_priv *priv = fe->tuner_priv;
+	*bandwidth = priv->bandwidth;
+	return 0;
+}
+
+
+static const struct dvb_tuner_ops fc0012_tuner_ops = {
+	.info = {
+		.name           = "Fitipower FC0012",
+
+		.frequency_min  = 170000000,
+		.frequency_max  = 860000000,
+		.frequency_step = 0,
+	},
+
+	.release       = fc0012_release,
+
+	.init          = fc0012_init,
+	.sleep         = fc0012_sleep,
+
+	.set_params    = fc0012_set_params,
+
+	.get_frequency = fc0012_get_frequency,
+	.get_if_frequency = fc0012_get_if_frequency,
+	.get_bandwidth = fc0012_get_bandwidth,
+};
+
+struct dvb_frontend * fc0012_attach(struct dvb_frontend *fe,
+	struct i2c_adapter *i2c, u8 i2c_address,
+	enum fc0012_xtal_freq xtal_freq)
+{
+	struct fc0012_priv *priv = NULL;
+
+	priv = kzalloc(sizeof(struct fc0012_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return NULL;
+
+	priv->i2c = i2c;
+	priv->addr = i2c_address;
+	priv->xtal_freq = xtal_freq;
+
+	info("Fitipower FC0012 successfully attached.");
+
+	fe->tuner_priv = priv;
+
+	memcpy(&fe->ops.tuner_ops, &fc0012_tuner_ops,
+		sizeof(struct dvb_tuner_ops));
+
+	return fe;
+}
+EXPORT_SYMBOL(fc0012_attach);
+
+MODULE_DESCRIPTION("Fitipower FC0012 silicon tuner driver");
+MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@xxxxxxx>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("0.4");
diff -Nupr a/drivers/media/common/tuners/fc0012.h b/drivers/media/common/tuners/fc0012.h
--- a/drivers/media/common/tuners/fc0012.h	1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/media/common/tuners/fc0012.h	2012-04-01 00:13:06.811166635 +0200
@@ -0,0 +1,49 @@
+/*
+ * Fitipower FC0012 tuner driver - include
+ *
+ * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@xxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef _FC0012_H_
+#define _FC0012_H_
+
+#include "dvb_frontend.h"
+
+enum fc0012_xtal_freq {
+	FC_XTAL_27_MHZ,		/* 27000000 */
+	FC_XTAL_28_8_MHZ,	/* 28800000 */
+	FC_XTAL_36_MHZ,		/* 36000000 */
+};
+
+#if defined(CONFIG_MEDIA_TUNER_FC0012) || \
+        (defined(CONFIG_MEDIA_TUNER_FC0012_MODULE) && defined(MODULE))
+extern struct dvb_frontend *fc0012_attach(struct dvb_frontend *fe,
+					struct i2c_adapter *i2c,
+					u8 i2c_address,
+					enum fc0012_xtal_freq xtal_freq);
+#else
+static inline struct dvb_frontend *fc0012_attach(struct dvb_frontend *fe,
+						struct i2c_adapter *i2c,
+						u8 i2c_address,
+						enum fc0012_xtal_freq xtal_freq)
+{
+	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+	return NULL;
+}
+#endif
+
+#endif
diff -Nupr a/drivers/media/common/tuners/fc0012-priv.h b/drivers/media/common/tuners/fc0012-priv.h
--- a/drivers/media/common/tuners/fc0012-priv.h	1970-01-01 01:00:00.000000000 +0100
+++ b/drivers/media/common/tuners/fc0012-priv.h	2012-04-01 00:13:22.801066482 +0200
@@ -0,0 +1,42 @@
+/*
+ * Fitipower FC0012 tuner driver - private includes
+ *
+ * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@xxxxxxx>
+ *
+ * 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.
+ */
+
+#ifndef _FC0012_PRIV_H_
+#define _FC0012_PRIV_H_
+
+#define LOG_PREFIX "fc0012"
+
+#undef err
+#define err(f, arg...)  printk(KERN_ERR     LOG_PREFIX": " f "\n" , ## arg)
+#undef info
+#define info(f, arg...) printk(KERN_INFO    LOG_PREFIX": " f "\n" , ## arg)
+#undef warn
+#define warn(f, arg...) printk(KERN_WARNING LOG_PREFIX": " f "\n" , ## arg)
+
+struct fc0012_priv {
+	struct i2c_adapter *i2c;
+	u8 addr;
+	u8 xtal_freq;
+
+	u32 frequency;
+	u32 bandwidth;
+};
+
+#endif
diff -Nupr a/drivers/media/common/tuners/Kconfig b/drivers/media/common/tuners/Kconfig
--- a/drivers/media/common/tuners/Kconfig	2012-01-08 05:45:35.000000000 +0100
+++ b/drivers/media/common/tuners/Kconfig	2012-03-31 23:59:03.098424806 +0200
@@ -211,4 +211,11 @@ config MEDIA_TUNER_TDA18212
 	help
 	  NXP TDA18212 silicon tuner driver.
 
+config MEDIA_TUNER_FC0012
+	tristate "Fitipower FC0012 silicon tuner"
+	depends on VIDEO_MEDIA && I2C
+	default m if MEDIA_TUNER_CUSTOMISE
+	help
+	  Fitipower FC0012 silicon tuner driver.
+
 endmenu
diff -Nupr a/drivers/media/common/tuners/Makefile b/drivers/media/common/tuners/Makefile
--- a/drivers/media/common/tuners/Makefile	2012-03-09 05:45:19.000000000 +0100
+++ b/drivers/media/common/tuners/Makefile	2012-04-01 00:00:05.697863847 +0200
@@ -28,6 +28,7 @@ obj-$(CONFIG_MEDIA_TUNER_MC44S803) += mc
 obj-$(CONFIG_MEDIA_TUNER_MAX2165) += max2165.o
 obj-$(CONFIG_MEDIA_TUNER_TDA18218) += tda18218.o
 obj-$(CONFIG_MEDIA_TUNER_TDA18212) += tda18212.o
+obj-$(CONFIG_MEDIA_TUNER_FC0012) += fc0012.o
 
 ccflags-y += -I$(srctree)/drivers/media/dvb/dvb-core
 ccflags-y += -I$(srctree)/drivers/media/dvb/frontends


Hans-Frieder Vogt                       e-mail: hfvogt <at> gmx .dot. net
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Input]     [Video for Linux]     [Gstreamer Embedded]     [Mplayer Users]     [Linux USB Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux