Initial import

1 files changed, 353 insertions, 0 deletions

diff --git a/drivers/media/tuners/mt2266.c b/drivers/media/tuners/mt2266.c
new file mode 100644
index 000000000..bca4d75e4
--- /dev/null
+++ b/drivers/media/tuners/mt2266.c
@@ -0,0 +1,353 @@
+/*
+ *  Driver for Microtune MT2266 "Direct conversion low power broadband tuner"
+ *
+ *  Copyright (c) 2007 Olivier DANET <odanet@caramail.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.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/dvb/frontend.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+
+#include "dvb_frontend.h"
+#include "mt2266.h"
+
+#define I2C_ADDRESS 0x60
+
+#define REG_PART_REV   0
+#define REG_TUNE       1
+#define REG_BAND       6
+#define REG_BANDWIDTH  8
+#define REG_LOCK       0x12
+
+#define PART_REV 0x85
+
+struct mt2266_priv {
+	struct mt2266_config *cfg;
+	struct i2c_adapter   *i2c;
+
+	u32 frequency;
+	u32 bandwidth;
+	u8 band;
+};
+
+#define MT2266_VHF 1
+#define MT2266_UHF 0
+
+/* Here, frequencies are expressed in kiloHertz to avoid 32 bits overflows */
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
+
+#define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "MT2266: " args); printk("\n"); }} while (0)
+
+// Reads a single register
+static int mt2266_readreg(struct mt2266_priv *priv, u8 reg, u8 *val)
+{
+	struct i2c_msg msg[2] = {
+		{ .addr = priv->cfg->i2c_address, .flags = 0,        .buf = &reg, .len = 1 },
+		{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val,  .len = 1 },
+	};
+	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
+		printk(KERN_WARNING "MT2266 I2C read failed\n");
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+// Writes a single register
+static int mt2266_writereg(struct mt2266_priv *priv, u8 reg, u8 val)
+{
+	u8 buf[2] = { reg, val };
+	struct i2c_msg msg = {
+		.addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2
+	};
+	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+		printk(KERN_WARNING "MT2266 I2C write failed\n");
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+// Writes a set of consecutive registers
+static int mt2266_writeregs(struct mt2266_priv *priv,u8 *buf, u8 len)
+{
+	struct i2c_msg msg = {
+		.addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len
+	};
+	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
+		printk(KERN_WARNING "MT2266 I2C write failed (len=%i)\n",(int)len);
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+// Initialisation sequences
+static u8 mt2266_init1[] = { REG_TUNE, 0x00, 0x00, 0x28,
+				 0x00, 0x52, 0x99, 0x3f };
+
+static u8 mt2266_init2[] = {
+    0x17, 0x6d, 0x71, 0x61, 0xc0, 0xbf, 0xff, 0xdc, 0x00, 0x0a, 0xd4,
+    0x03, 0x64, 0x64, 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14,
+    0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f, 0x5e, 0x3f, 0xff, 0xff,
+    0xff, 0x00, 0x77, 0x0f, 0x2d
+};
+
+static u8 mt2266_init_8mhz[] = { REG_BANDWIDTH, 0x22, 0x22, 0x22, 0x22,
+						0x22, 0x22, 0x22, 0x22 };
+
+static u8 mt2266_init_7mhz[] = { REG_BANDWIDTH, 0x32, 0x32, 0x32, 0x32,
+						0x32, 0x32, 0x32, 0x32 };
+
+static u8 mt2266_init_6mhz[] = { REG_BANDWIDTH, 0xa7, 0xa7, 0xa7, 0xa7,
+						0xa7, 0xa7, 0xa7, 0xa7 };
+
+static u8 mt2266_uhf[] = { 0x1d, 0xdc, 0x00, 0x0a, 0xd4, 0x03, 0x64, 0x64,
+			   0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14 };
+
+static u8 mt2266_vhf[] = { 0x1d, 0xfe, 0x00, 0x00, 0xb4, 0x03, 0xa5, 0xa5,
+			   0xa5, 0xa5, 0x82, 0xaa, 0xf1, 0x17, 0x80, 0x1f };
+
+#define FREF 30000       // Quartz oscillator 30 MHz
+
+static int mt2266_set_params(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	struct mt2266_priv *priv;
+	int ret=0;
+	u32 freq;
+	u32 tune;
+	u8  lnaband;
+	u8  b[10];
+	int i;
+	u8 band;
+
+	priv = fe->tuner_priv;
+
+	freq = priv->frequency / 1000; /* Hz -> kHz */
+	if (freq < 470000 && freq > 230000)
+		return -EINVAL; /* Gap between VHF and UHF bands */
+
+	priv->frequency = c->frequency;
+	tune = 2 * freq * (8192/16) / (FREF/16);
+	band = (freq < 300000) ? MT2266_VHF : MT2266_UHF;
+	if (band == MT2266_VHF)
+		tune *= 2;
+
+	switch (c->bandwidth_hz) {
+	case 6000000:
+		mt2266_writeregs(priv, mt2266_init_6mhz,
+				 sizeof(mt2266_init_6mhz));
+		break;
+	case 8000000:
+		mt2266_writeregs(priv, mt2266_init_8mhz,
+				 sizeof(mt2266_init_8mhz));
+		break;
+	case 7000000:
+	default:
+		mt2266_writeregs(priv, mt2266_init_7mhz,
+				 sizeof(mt2266_init_7mhz));
+		break;
+	}
+	priv->bandwidth = c->bandwidth_hz;
+
+	if (band == MT2266_VHF && priv->band == MT2266_UHF) {
+		dprintk("Switch from UHF to VHF");
+		mt2266_writereg(priv, 0x05, 0x04);
+		mt2266_writereg(priv, 0x19, 0x61);
+		mt2266_writeregs(priv, mt2266_vhf, sizeof(mt2266_vhf));
+	} else if (band == MT2266_UHF && priv->band == MT2266_VHF) {
+		dprintk("Switch from VHF to UHF");
+		mt2266_writereg(priv, 0x05, 0x52);
+		mt2266_writereg(priv, 0x19, 0x61);
+		mt2266_writeregs(priv, mt2266_uhf, sizeof(mt2266_uhf));
+	}
+	msleep(10);
+
+	if (freq <= 495000)
+		lnaband = 0xEE;
+	else if (freq <= 525000)
+		lnaband = 0xDD;
+	else if (freq <= 550000)
+		lnaband = 0xCC;
+	else if (freq <= 580000)
+		lnaband = 0xBB;
+	else if (freq <= 605000)
+		lnaband = 0xAA;
+	else if (freq <= 630000)
+		lnaband = 0x99;
+	else if (freq <= 655000)
+		lnaband = 0x88;
+	else if (freq <= 685000)
+		lnaband = 0x77;
+	else if (freq <= 710000)
+		lnaband = 0x66;
+	else if (freq <= 735000)
+		lnaband = 0x55;
+	else if (freq <= 765000)
+		lnaband = 0x44;
+	else if (freq <= 802000)
+		lnaband = 0x33;
+	else if (freq <= 840000)
+		lnaband = 0x22;
+	else
+		lnaband = 0x11;
+
+	b[0] = REG_TUNE;
+	b[1] = (tune >> 8) & 0x1F;
+	b[2] = tune & 0xFF;
+	b[3] = tune >> 13;
+	mt2266_writeregs(priv,b,4);
+
+	dprintk("set_parms: tune=%d band=%d %s",
+		(int) tune, (int) lnaband,
+		(band == MT2266_UHF) ? "UHF" : "VHF");
+	dprintk("set_parms: [1..3]: %2x %2x %2x",
+		(int) b[1], (int) b[2], (int)b[3]);
+
+	if (band == MT2266_UHF) {
+		b[0] = 0x05;
+		b[1] = (priv->band == MT2266_VHF) ? 0x52 : 0x62;
+		b[2] = lnaband;
+		mt2266_writeregs(priv, b, 3);
+	}
+
+	/* Wait for pll lock or timeout */
+	i = 0;
+	do {
+		mt2266_readreg(priv,REG_LOCK,b);
+		if (b[0] & 0x40)
+			break;
+		msleep(10);
+		i++;
+	} while (i<10);
+	dprintk("Lock when i=%i",(int)i);
+
+	if (band == MT2266_UHF && priv->band == MT2266_VHF)
+		mt2266_writereg(priv, 0x05, 0x62);
+
+	priv->band = band;
+
+	return ret;
+}
+
+static void mt2266_calibrate(struct mt2266_priv *priv)
+{
+	mt2266_writereg(priv, 0x11, 0x03);
+	mt2266_writereg(priv, 0x11, 0x01);
+	mt2266_writeregs(priv, mt2266_init1, sizeof(mt2266_init1));
+	mt2266_writeregs(priv, mt2266_init2, sizeof(mt2266_init2));
+	mt2266_writereg(priv, 0x33, 0x5e);
+	mt2266_writereg(priv, 0x10, 0x10);
+	mt2266_writereg(priv, 0x10, 0x00);
+	mt2266_writeregs(priv, mt2266_init_8mhz, sizeof(mt2266_init_8mhz));
+	msleep(25);
+	mt2266_writereg(priv, 0x17, 0x6d);
+	mt2266_writereg(priv, 0x1c, 0x00);
+	msleep(75);
+	mt2266_writereg(priv, 0x17, 0x6d);
+	mt2266_writereg(priv, 0x1c, 0xff);
+}
+
+static int mt2266_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct mt2266_priv *priv = fe->tuner_priv;
+	*frequency = priv->frequency;
+	return 0;
+}
+
+static int mt2266_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+	struct mt2266_priv *priv = fe->tuner_priv;
+	*bandwidth = priv->bandwidth;
+	return 0;
+}
+
+static int mt2266_init(struct dvb_frontend *fe)
+{
+	int ret;
+	struct mt2266_priv *priv = fe->tuner_priv;
+	ret = mt2266_writereg(priv, 0x17, 0x6d);
+	if (ret < 0)
+		return ret;
+	ret = mt2266_writereg(priv, 0x1c, 0xff);
+	if (ret < 0)
+		return ret;
+	return 0;
+}
+
+static int mt2266_sleep(struct dvb_frontend *fe)
+{
+	struct mt2266_priv *priv = fe->tuner_priv;
+	mt2266_writereg(priv, 0x17, 0x6d);
+	mt2266_writereg(priv, 0x1c, 0x00);
+	return 0;
+}
+
+static int mt2266_release(struct dvb_frontend *fe)
+{
+	kfree(fe->tuner_priv);
+	fe->tuner_priv = NULL;
+	return 0;
+}
+
+static const struct dvb_tuner_ops mt2266_tuner_ops = {
+	.info = {
+		.name           = "Microtune MT2266",
+		.frequency_min  = 174000000,
+		.frequency_max  = 862000000,
+		.frequency_step =     50000,
+	},
+	.release       = mt2266_release,
+	.init          = mt2266_init,
+	.sleep         = mt2266_sleep,
+	.set_params    = mt2266_set_params,
+	.get_frequency = mt2266_get_frequency,
+	.get_bandwidth = mt2266_get_bandwidth
+};
+
+struct dvb_frontend * mt2266_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2266_config *cfg)
+{
+	struct mt2266_priv *priv = NULL;
+	u8 id = 0;
+
+	priv = kzalloc(sizeof(struct mt2266_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return NULL;
+
+	priv->cfg      = cfg;
+	priv->i2c      = i2c;
+	priv->band     = MT2266_UHF;
+
+	if (mt2266_readreg(priv, 0, &id)) {
+		kfree(priv);
+		return NULL;
+	}
+	if (id != PART_REV) {
+		kfree(priv);
+		return NULL;
+	}
+	printk(KERN_INFO "MT2266: successfully identified\n");
+	memcpy(&fe->ops.tuner_ops, &mt2266_tuner_ops, sizeof(struct dvb_tuner_ops));
+
+	fe->tuner_priv = priv;
+	mt2266_calibrate(priv);
+	return fe;
+}
+EXPORT_SYMBOL(mt2266_attach);
+
+MODULE_AUTHOR("Olivier DANET");
+MODULE_DESCRIPTION("Microtune MT2266 silicon tuner driver");
+MODULE_LICENSE("GPL");