Initial import

1 files changed, 461 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/stv6110.c b/drivers/media/dvb-frontends/stv6110.c
new file mode 100644
index 000000000..b1425830a
--- /dev/null
+++ b/drivers/media/dvb-frontends/stv6110.c
@@ -0,0 +1,461 @@
+/*
+ * stv6110.c
+ *
+ * Driver for ST STV6110 satellite tuner IC.
+ *
+ * Copyright (C) 2009 NetUP Inc.
+ * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
+ *
+ * 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 <linux/slab.h>
+#include <linux/module.h>
+#include <linux/dvb/frontend.h>
+
+#include <linux/types.h>
+
+#include "stv6110.h"
+
+/* Max transfer size done by I2C transfer functions */
+#define MAX_XFER_SIZE  64
+
+static int debug;
+
+struct stv6110_priv {
+	int i2c_address;
+	struct i2c_adapter *i2c;
+
+	u32 mclk;
+	u8 clk_div;
+	u8 gain;
+	u8 regs[8];
+};
+
+#define dprintk(args...) \
+	do { \
+		if (debug) \
+			printk(KERN_DEBUG args); \
+	} while (0)
+
+static s32 abssub(s32 a, s32 b)
+{
+	if (a > b)
+		return a - b;
+	else
+		return b - a;
+};
+
+static int stv6110_release(struct dvb_frontend *fe)
+{
+	kfree(fe->tuner_priv);
+	fe->tuner_priv = NULL;
+	return 0;
+}
+
+static int stv6110_write_regs(struct dvb_frontend *fe, u8 buf[],
+							int start, int len)
+{
+	struct stv6110_priv *priv = fe->tuner_priv;
+	int rc;
+	u8 cmdbuf[MAX_XFER_SIZE];
+	struct i2c_msg msg = {
+		.addr	= priv->i2c_address,
+		.flags	= 0,
+		.buf	= cmdbuf,
+		.len	= len + 1
+	};
+
+	dprintk("%s\n", __func__);
+
+	if (1 + len > sizeof(cmdbuf)) {
+		printk(KERN_WARNING
+		       "%s: i2c wr: len=%d is too big!\n",
+		       KBUILD_MODNAME, len);
+		return -EINVAL;
+	}
+
+	if (start + len > 8)
+		return -EINVAL;
+
+	memcpy(&cmdbuf[1], buf, len);
+	cmdbuf[0] = start;
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	rc = i2c_transfer(priv->i2c, &msg, 1);
+	if (rc != 1)
+		dprintk("%s: i2c error\n", __func__);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	return 0;
+}
+
+static int stv6110_read_regs(struct dvb_frontend *fe, u8 regs[],
+							int start, int len)
+{
+	struct stv6110_priv *priv = fe->tuner_priv;
+	int rc;
+	u8 reg[] = { start };
+	struct i2c_msg msg[] = {
+		{
+			.addr	= priv->i2c_address,
+			.flags	= 0,
+			.buf	= reg,
+			.len	= 1,
+		}, {
+			.addr	= priv->i2c_address,
+			.flags	= I2C_M_RD,
+			.buf	= regs,
+			.len	= len,
+		},
+	};
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	rc = i2c_transfer(priv->i2c, msg, 2);
+	if (rc != 2)
+		dprintk("%s: i2c error\n", __func__);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	memcpy(&priv->regs[start], regs, len);
+
+	return 0;
+}
+
+static int stv6110_read_reg(struct dvb_frontend *fe, int start)
+{
+	u8 buf[] = { 0 };
+	stv6110_read_regs(fe, buf, start, 1);
+
+	return buf[0];
+}
+
+static int stv6110_sleep(struct dvb_frontend *fe)
+{
+	u8 reg[] = { 0 };
+	stv6110_write_regs(fe, reg, 0, 1);
+
+	return 0;
+}
+
+static u32 carrier_width(u32 symbol_rate, fe_rolloff_t rolloff)
+{
+	u32 rlf;
+
+	switch (rolloff) {
+	case ROLLOFF_20:
+		rlf = 20;
+		break;
+	case ROLLOFF_25:
+		rlf = 25;
+		break;
+	default:
+		rlf = 35;
+		break;
+	}
+
+	return symbol_rate  + ((symbol_rate * rlf) / 100);
+}
+
+static int stv6110_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
+{
+	struct stv6110_priv *priv = fe->tuner_priv;
+	u8 r8, ret = 0x04;
+	int i;
+
+	if ((bandwidth / 2) > 36000000) /*BW/2 max=31+5=36 mhz for r8=31*/
+		r8 = 31;
+	else if ((bandwidth / 2) < 5000000) /* BW/2 min=5Mhz for F=0 */
+		r8 = 0;
+	else /*if 5 < BW/2 < 36*/
+		r8 = (bandwidth / 2) / 1000000 - 5;
+
+	/* ctrl3, RCCLKOFF = 0 Activate the calibration Clock */
+	/* ctrl3, CF = r8 Set the LPF value */
+	priv->regs[RSTV6110_CTRL3] &= ~((1 << 6) | 0x1f);
+	priv->regs[RSTV6110_CTRL3] |= (r8 & 0x1f);
+	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
+	/* stat1, CALRCSTRT = 1 Start LPF auto calibration*/
+	priv->regs[RSTV6110_STAT1] |= 0x02;
+	stv6110_write_regs(fe, &priv->regs[RSTV6110_STAT1], RSTV6110_STAT1, 1);
+
+	i = 0;
+	/* Wait for CALRCSTRT == 0 */
+	while ((i < 10) && (ret != 0)) {
+		ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x02);
+		mdelay(1);	/* wait for LPF auto calibration */
+		i++;
+	}
+
+	/* RCCLKOFF = 1 calibration done, desactivate the calibration Clock */
+	priv->regs[RSTV6110_CTRL3] |= (1 << 6);
+	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL3], RSTV6110_CTRL3, 1);
+	return 0;
+}
+
+static int stv6110_init(struct dvb_frontend *fe)
+{
+	struct stv6110_priv *priv = fe->tuner_priv;
+	u8 buf0[] = { 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
+
+	memcpy(priv->regs, buf0, 8);
+	/* K = (Reference / 1000000) - 16 */
+	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
+	priv->regs[RSTV6110_CTRL1] |=
+				((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
+
+	/* divisor value for the output clock */
+	priv->regs[RSTV6110_CTRL2] &= ~0xc0;
+	priv->regs[RSTV6110_CTRL2] |= (priv->clk_div << 6);
+
+	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1], RSTV6110_CTRL1, 8);
+	msleep(1);
+	stv6110_set_bandwidth(fe, 72000000);
+
+	return 0;
+}
+
+static int stv6110_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct stv6110_priv *priv = fe->tuner_priv;
+	u32 nbsteps, divider, psd2, freq;
+	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+
+	stv6110_read_regs(fe, regs, 0, 8);
+	/*N*/
+	divider = (priv->regs[RSTV6110_TUNING2] & 0x0f) << 8;
+	divider += priv->regs[RSTV6110_TUNING1];
+
+	/*R*/
+	nbsteps  = (priv->regs[RSTV6110_TUNING2] >> 6) & 3;
+	/*p*/
+	psd2  = (priv->regs[RSTV6110_TUNING2] >> 4) & 1;
+
+	freq = divider * (priv->mclk / 1000);
+	freq /= (1 << (nbsteps + psd2));
+	freq /= 4;
+
+	*frequency = freq;
+
+	return 0;
+}
+
+static int stv6110_set_frequency(struct dvb_frontend *fe, u32 frequency)
+{
+	struct stv6110_priv *priv = fe->tuner_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	u8 ret = 0x04;
+	u32 divider, ref, p, presc, i, result_freq, vco_freq;
+	s32 p_calc, p_calc_opt = 1000, r_div, r_div_opt = 0, p_val;
+	s32 srate;
+
+	dprintk("%s, freq=%d kHz, mclk=%d Hz\n", __func__,
+						frequency, priv->mclk);
+
+	/* K = (Reference / 1000000) - 16 */
+	priv->regs[RSTV6110_CTRL1] &= ~(0x1f << 3);
+	priv->regs[RSTV6110_CTRL1] |=
+				((((priv->mclk / 1000000) - 16) & 0x1f) << 3);
+
+	/* BB_GAIN = db/2 */
+	if (fe->ops.set_property && fe->ops.get_property) {
+		srate = c->symbol_rate;
+		dprintk("%s: Get Frontend parameters: srate=%d\n",
+							__func__, srate);
+	} else
+		srate = 15000000;
+
+	priv->regs[RSTV6110_CTRL2] &= ~0x0f;
+	priv->regs[RSTV6110_CTRL2] |= (priv->gain & 0x0f);
+
+	if (frequency <= 1023000) {
+		p = 1;
+		presc = 0;
+	} else if (frequency <= 1300000) {
+		p = 1;
+		presc = 1;
+	} else if (frequency <= 2046000) {
+		p = 0;
+		presc = 0;
+	} else {
+		p = 0;
+		presc = 1;
+	}
+	/* DIV4SEL = p*/
+	priv->regs[RSTV6110_TUNING2] &= ~(1 << 4);
+	priv->regs[RSTV6110_TUNING2] |= (p << 4);
+
+	/* PRESC32ON = presc */
+	priv->regs[RSTV6110_TUNING2] &= ~(1 << 5);
+	priv->regs[RSTV6110_TUNING2] |= (presc << 5);
+
+	p_val = (int)(1 << (p + 1)) * 10;/* P = 2 or P = 4 */
+	for (r_div = 0; r_div <= 3; r_div++) {
+		p_calc = (priv->mclk / 100000);
+		p_calc /= (1 << (r_div + 1));
+		if ((abssub(p_calc, p_val)) < (abssub(p_calc_opt, p_val)))
+			r_div_opt = r_div;
+
+		p_calc_opt = (priv->mclk / 100000);
+		p_calc_opt /= (1 << (r_div_opt + 1));
+	}
+
+	ref = priv->mclk / ((1 << (r_div_opt + 1))  * (1 << (p + 1)));
+	divider = (((frequency * 1000) + (ref >> 1)) / ref);
+
+	/* RDIV = r_div_opt */
+	priv->regs[RSTV6110_TUNING2] &= ~(3 << 6);
+	priv->regs[RSTV6110_TUNING2] |= (((r_div_opt) & 3) << 6);
+
+	/* NDIV_MSB = MSB(divider) */
+	priv->regs[RSTV6110_TUNING2] &= ~0x0f;
+	priv->regs[RSTV6110_TUNING2] |= (((divider) >> 8) & 0x0f);
+
+	/* NDIV_LSB, LSB(divider) */
+	priv->regs[RSTV6110_TUNING1] = (divider & 0xff);
+
+	/* CALVCOSTRT = 1 VCO Auto Calibration */
+	priv->regs[RSTV6110_STAT1] |= 0x04;
+	stv6110_write_regs(fe, &priv->regs[RSTV6110_CTRL1],
+						RSTV6110_CTRL1, 8);
+
+	i = 0;
+	/* Wait for CALVCOSTRT == 0 */
+	while ((i < 10) && (ret != 0)) {
+		ret = ((stv6110_read_reg(fe, RSTV6110_STAT1)) & 0x04);
+		msleep(1); /* wait for VCO auto calibration */
+		i++;
+	}
+
+	ret = stv6110_read_reg(fe, RSTV6110_STAT1);
+	stv6110_get_frequency(fe, &result_freq);
+
+	vco_freq = divider * ((priv->mclk / 1000) / ((1 << (r_div_opt + 1))));
+	dprintk("%s, stat1=%x, lo_freq=%d kHz, vco_frec=%d kHz\n", __func__,
+						ret, result_freq, vco_freq);
+
+	return 0;
+}
+
+static int stv6110_set_params(struct dvb_frontend *fe)
+{
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	u32 bandwidth = carrier_width(c->symbol_rate, c->rolloff);
+
+	stv6110_set_frequency(fe, c->frequency);
+	stv6110_set_bandwidth(fe, bandwidth);
+
+	return 0;
+}
+
+static int stv6110_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+	struct stv6110_priv *priv = fe->tuner_priv;
+	u8 r8 = 0;
+	u8 regs[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+	stv6110_read_regs(fe, regs, 0, 8);
+
+	/* CF */
+	r8 = priv->regs[RSTV6110_CTRL3] & 0x1f;
+	*bandwidth = (r8 + 5) * 2000000;/* x2 for ZIF tuner BW/2 = F+5 Mhz */
+
+	return 0;
+}
+
+static struct dvb_tuner_ops stv6110_tuner_ops = {
+	.info = {
+		.name = "ST STV6110",
+		.frequency_min = 950000,
+		.frequency_max = 2150000,
+		.frequency_step = 1000,
+	},
+	.init = stv6110_init,
+	.release = stv6110_release,
+	.sleep = stv6110_sleep,
+	.set_params = stv6110_set_params,
+	.get_frequency = stv6110_get_frequency,
+	.set_frequency = stv6110_set_frequency,
+	.get_bandwidth = stv6110_get_bandwidth,
+	.set_bandwidth = stv6110_set_bandwidth,
+
+};
+
+struct dvb_frontend *stv6110_attach(struct dvb_frontend *fe,
+					const struct stv6110_config *config,
+					struct i2c_adapter *i2c)
+{
+	struct stv6110_priv *priv = NULL;
+	u8 reg0[] = { 0x00, 0x07, 0x11, 0xdc, 0x85, 0x17, 0x01, 0xe6, 0x1e };
+
+	struct i2c_msg msg[] = {
+		{
+			.addr = config->i2c_address,
+			.flags = 0,
+			.buf = reg0,
+			.len = 9
+		}
+	};
+	int ret;
+
+	/* divisor value for the output clock */
+	reg0[2] &= ~0xc0;
+	reg0[2] |= (config->clk_div << 6);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1);
+
+	ret = i2c_transfer(i2c, msg, 1);
+
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0);
+
+	if (ret != 1)
+		return NULL;
+
+	priv = kzalloc(sizeof(struct stv6110_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return NULL;
+
+	priv->i2c_address = config->i2c_address;
+	priv->i2c = i2c;
+	priv->mclk = config->mclk;
+	priv->clk_div = config->clk_div;
+	priv->gain = config->gain;
+
+	memcpy(&priv->regs, &reg0[1], 8);
+
+	memcpy(&fe->ops.tuner_ops, &stv6110_tuner_ops,
+				sizeof(struct dvb_tuner_ops));
+	fe->tuner_priv = priv;
+	printk(KERN_INFO "STV6110 attached on addr=%x!\n", priv->i2c_address);
+
+	return fe;
+}
+EXPORT_SYMBOL(stv6110_attach);
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_DESCRIPTION("ST STV6110 driver");
+MODULE_AUTHOR("Igor M. Liplianin");
+MODULE_LICENSE("GPL");