V4L/DVB (8971): initial driver for af9013 demodulator

- initial driver for the Afatech AF9013 demodulator

Signed-off-by: Antti Palosaari <crope@iki.fi>
[mchehab.redhat.com: having a global var called 'debug' is not a good idea. rename it to af9013_debug]
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 1691 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/af9013.c b/drivers/media/dvb/frontends/af9013.c
new file mode 100644
index 00000000000..9f2129d544c
--- /dev/null
+++ b/drivers/media/dvb/frontends/af9013.c
@@ -0,0 +1,1691 @@
+/*
+ * DVB USB Linux driver for Afatech AF9015 DVB-T USB2.0 receiver
+ *
+ * Copyright (C) 2007 Antti Palosaari <crope@iki.fi>
+ *
+ * Thanks to Afatech who kindly provided information.
+ *
+ *    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/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/firmware.h>
+
+#include "dvb_frontend.h"
+#include "af9013_priv.h"
+#include "af9013.h"
+
+int af9013_debug;
+
+struct af9013_state {
+	struct i2c_adapter *i2c;
+	struct dvb_frontend frontend;
+
+	struct af9013_config config;
+
+	u16 signal_strength;
+	u32 ber;
+	u32 ucblocks;
+	u16 snr;
+	u32 frequency;
+	unsigned long next_statistics_check;
+};
+
+static u8 regmask[8] = { 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff };
+
+static int af9013_write_regs(struct af9013_state *state, u8 mbox, u16 reg,
+	u8 *val, u8 len)
+{
+	u8 buf[3+len];
+	struct i2c_msg msg = {
+		.addr = state->config.demod_address,
+		.flags = 0,
+		.len = sizeof(buf),
+		.buf = buf };
+
+	buf[0] = reg >> 8;
+	buf[1] = reg & 0xff;
+	buf[2] = mbox;
+	memcpy(&buf[3], val, len);
+
+	if (i2c_transfer(state->i2c, &msg, 1) != 1) {
+		warn("I2C write failed reg:%04x len:%d", reg, len);
+		return -EREMOTEIO;
+	}
+	return 0;
+}
+
+static int af9013_write_ofdm_regs(struct af9013_state *state, u16 reg, u8 *val,
+	u8 len)
+{
+	u8 mbox = (1 << 0)|(1 << 1)|((len - 1) << 2)|(0 << 6)|(0 << 7);
+	return af9013_write_regs(state, mbox, reg, val, len);
+}
+
+static int af9013_write_ofsm_regs(struct af9013_state *state, u16 reg, u8 *val,
+	u8 len)
+{
+	u8 mbox = (1 << 0)|(1 << 1)|((len - 1) << 2)|(1 << 6)|(1 << 7);
+	return af9013_write_regs(state, mbox, reg, val, len);
+}
+
+/* write single register */
+static int af9013_write_reg(struct af9013_state *state, u16 reg, u8 val)
+{
+	return af9013_write_ofdm_regs(state, reg, &val, 1);
+}
+
+/* read single register */
+static int af9013_read_reg(struct af9013_state *state, u16 reg, u8 *val)
+{
+	u8 obuf[3] = { reg >> 8, reg & 0xff, 0 };
+	u8 ibuf[1];
+	struct i2c_msg msg[2] = {
+		{
+			.addr = state->config.demod_address,
+			.flags = 0,
+			.len = sizeof(obuf),
+			.buf = obuf
+		}, {
+			.addr = state->config.demod_address,
+			.flags = I2C_M_RD,
+			.len = sizeof(ibuf),
+			.buf = ibuf
+		}
+	};
+
+	if (i2c_transfer(state->i2c, msg, 2) != 2) {
+		warn("I2C read failed reg:%04x", reg);
+		return -EREMOTEIO;
+	}
+	*val = ibuf[0];
+	return 0;
+}
+
+static int af9013_write_reg_bits(struct af9013_state *state, u16 reg, u8 pos,
+	u8 len, u8 val)
+{
+	int ret;
+	u8 tmp, mask;
+
+	ret = af9013_read_reg(state, reg, &tmp);
+	if (ret)
+		return ret;
+
+	mask = regmask[len - 1] << pos;
+	tmp = (tmp & ~mask) | ((val << pos) & mask);
+
+	return af9013_write_reg(state, reg, tmp);
+}
+
+static int af9013_read_reg_bits(struct af9013_state *state, u16 reg, u8 pos,
+	u8 len, u8 *val)
+{
+	int ret;
+	u8 tmp;
+
+	ret = af9013_read_reg(state, reg, &tmp);
+	if (ret)
+		return ret;
+	*val = (tmp >> pos) & regmask[len - 1];
+	return 0;
+}
+
+static int af9013_set_gpio(struct af9013_state *state, u8 gpio, u8 gpioval)
+{
+	int ret;
+	u8 pos;
+	u16 addr;
+	deb_info("%s: gpio:%d gpioval:%02x\n", __func__, gpio, gpioval);
+
+/* GPIO0 & GPIO1 0xd735
+   GPIO2 & GPIO3 0xd736 */
+
+	switch (gpio) {
+	case 0:
+	case 1:
+		addr = 0xd735;
+		break;
+	case 2:
+	case 3:
+		addr = 0xd736;
+		break;
+
+	default:
+		err("invalid gpio:%d\n", gpio);
+		ret = -EINVAL;
+		goto error;
+	};
+
+	switch (gpio) {
+	case 0:
+	case 2:
+		pos = 0;
+		break;
+	case 1:
+	case 3:
+	default:
+		pos = 4;
+		break;
+	};
+
+	ret = af9013_write_reg_bits(state, addr, pos, 4, gpioval);
+
+error:
+	return ret;
+}
+
+static u32 af913_div(u32 a, u32 b, u32 x)
+{
+	u32 r = 0, c = 0, i;
+	deb_info("%s: a:%d b:%d x:%d\n", __func__, a, b, x);
+
+	if (a > b) {
+		c = a / b;
+		a = a - c * b;
+	}
+
+	for (i = 0; i < x; i++) {
+		if (a >= b) {
+			r += 1;
+			a -= b;
+		}
+		a <<= 1;
+		r <<= 1;
+	}
+	r = (c << (u32)x) + r;
+
+	deb_info("%s: a:%d b:%d x:%d r:%d r:%x\n", __func__, a, b, x, r, r);
+	return r;
+}
+
+static int af9013_set_coeff(struct af9013_state *state, fe_bandwidth_t bw)
+{
+	int ret = 0;
+	u8 i = 0;
+	u8 buf[24];
+	u32 ns_coeff1_2048nu;
+	u32 ns_coeff1_8191nu;
+	u32 ns_coeff1_8192nu;
+	u32 ns_coeff1_8193nu;
+	u32 ns_coeff2_2k;
+	u32 ns_coeff2_8k;
+
+	deb_info("%s: adc_clock:%d bw:%d\n", __func__,
+		state->config.adc_clock, bw);
+
+	switch (state->config.adc_clock) {
+	case 28800: /* 28.800 MHz */
+		switch (bw) {
+		case BANDWIDTH_6_MHZ:
+			ns_coeff1_2048nu = 0x01e79e7a;
+			ns_coeff1_8191nu = 0x0079eb6e;
+			ns_coeff1_8192nu = 0x0079e79e;
+			ns_coeff1_8193nu = 0x0079e3cf;
+			ns_coeff2_2k     = 0x00f3cf3d;
+			ns_coeff2_8k     = 0x003cf3cf;
+			break;
+		case BANDWIDTH_7_MHZ:
+			ns_coeff1_2048nu = 0x0238e38e;
+			ns_coeff1_8191nu = 0x008e3d55;
+			ns_coeff1_8192nu = 0x008e38e4;
+			ns_coeff1_8193nu = 0x008e3472;
+			ns_coeff2_2k     = 0x011c71c7;
+			ns_coeff2_8k     = 0x00471c72;
+			break;
+		case BANDWIDTH_8_MHZ:
+			ns_coeff1_2048nu = 0x028a28a3;
+			ns_coeff1_8191nu = 0x00a28f3d;
+			ns_coeff1_8192nu = 0x00a28a29;
+			ns_coeff1_8193nu = 0x00a28514;
+			ns_coeff2_2k     = 0x01451451;
+			ns_coeff2_8k     = 0x00514514;
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		break;
+	case 20480: /* 20.480 MHz */
+		switch (bw) {
+		case BANDWIDTH_6_MHZ:
+			ns_coeff1_2048nu = 0x02adb6dc;
+			ns_coeff1_8191nu = 0x00ab7313;
+			ns_coeff1_8192nu = 0x00ab6db7;
+			ns_coeff1_8193nu = 0x00ab685c;
+			ns_coeff2_2k     = 0x0156db6e;
+			ns_coeff2_8k     = 0x0055b6dc;
+			break;
+		case BANDWIDTH_7_MHZ:
+			ns_coeff1_2048nu = 0x03200001;
+			ns_coeff1_8191nu = 0x00c80640;
+			ns_coeff1_8192nu = 0x00c80000;
+			ns_coeff1_8193nu = 0x00c7f9c0;
+			ns_coeff2_2k     = 0x01900000;
+			ns_coeff2_8k     = 0x00640000;
+			break;
+		case BANDWIDTH_8_MHZ:
+			ns_coeff1_2048nu = 0x03924926;
+			ns_coeff1_8191nu = 0x00e4996e;
+			ns_coeff1_8192nu = 0x00e49249;
+			ns_coeff1_8193nu = 0x00e48b25;
+			ns_coeff2_2k     = 0x01c92493;
+			ns_coeff2_8k     = 0x00724925;
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		break;
+	case 28000: /* 28.000 MHz */
+		switch (bw) {
+		case BANDWIDTH_6_MHZ:
+			ns_coeff1_2048nu = 0x01f58d10;
+			ns_coeff1_8191nu = 0x007d672f;
+			ns_coeff1_8192nu = 0x007d6344;
+			ns_coeff1_8193nu = 0x007d5f59;
+			ns_coeff2_2k     = 0x00fac688;
+			ns_coeff2_8k     = 0x003eb1a2;
+			break;
+		case BANDWIDTH_7_MHZ:
+			ns_coeff1_2048nu = 0x02492492;
+			ns_coeff1_8191nu = 0x00924db7;
+			ns_coeff1_8192nu = 0x00924925;
+			ns_coeff1_8193nu = 0x00924492;
+			ns_coeff2_2k     = 0x01249249;
+			ns_coeff2_8k     = 0x00492492;
+			break;
+		case BANDWIDTH_8_MHZ:
+			ns_coeff1_2048nu = 0x029cbc15;
+			ns_coeff1_8191nu = 0x00a7343f;
+			ns_coeff1_8192nu = 0x00a72f05;
+			ns_coeff1_8193nu = 0x00a729cc;
+			ns_coeff2_2k     = 0x014e5e0a;
+			ns_coeff2_8k     = 0x00539783;
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		break;
+	case 25000: /* 25.000 MHz */
+		switch (bw) {
+		case BANDWIDTH_6_MHZ:
+			ns_coeff1_2048nu = 0x0231bcb5;
+			ns_coeff1_8191nu = 0x008c7391;
+			ns_coeff1_8192nu = 0x008c6f2d;
+			ns_coeff1_8193nu = 0x008c6aca;
+			ns_coeff2_2k     = 0x0118de5b;
+			ns_coeff2_8k     = 0x00463797;
+			break;
+		case BANDWIDTH_7_MHZ:
+			ns_coeff1_2048nu = 0x028f5c29;
+			ns_coeff1_8191nu = 0x00a3dc29;
+			ns_coeff1_8192nu = 0x00a3d70a;
+			ns_coeff1_8193nu = 0x00a3d1ec;
+			ns_coeff2_2k     = 0x0147ae14;
+			ns_coeff2_8k     = 0x0051eb85;
+			break;
+		case BANDWIDTH_8_MHZ:
+			ns_coeff1_2048nu = 0x02ecfb9d;
+			ns_coeff1_8191nu = 0x00bb44c1;
+			ns_coeff1_8192nu = 0x00bb3ee7;
+			ns_coeff1_8193nu = 0x00bb390d;
+			ns_coeff2_2k     = 0x01767dce;
+			ns_coeff2_8k     = 0x005d9f74;
+			break;
+		default:
+			ret = -EINVAL;
+		}
+		break;
+	default:
+		err("invalid xtal");
+		return -EINVAL;
+	}
+	if (ret) {
+		err("invalid bandwidth");
+		return ret;
+	}
+
+	buf[i++] = (u8) ((ns_coeff1_2048nu & 0x03000000) >> 24);
+	buf[i++] = (u8) ((ns_coeff1_2048nu & 0x00ff0000) >> 16);
+	buf[i++] = (u8) ((ns_coeff1_2048nu & 0x0000ff00) >> 8);
+	buf[i++] = (u8) ((ns_coeff1_2048nu & 0x000000ff));
+	buf[i++] = (u8) ((ns_coeff2_2k     & 0x01c00000) >> 22);
+	buf[i++] = (u8) ((ns_coeff2_2k     & 0x003fc000) >> 14);
+	buf[i++] = (u8) ((ns_coeff2_2k     & 0x00003fc0) >> 6);
+	buf[i++] = (u8) ((ns_coeff2_2k     & 0x0000003f));
+	buf[i++] = (u8) ((ns_coeff1_8191nu & 0x03000000) >> 24);
+	buf[i++] = (u8) ((ns_coeff1_8191nu & 0x00ffc000) >> 16);
+	buf[i++] = (u8) ((ns_coeff1_8191nu & 0x0000ff00) >> 8);
+	buf[i++] = (u8) ((ns_coeff1_8191nu & 0x000000ff));
+	buf[i++] = (u8) ((ns_coeff1_8192nu & 0x03000000) >> 24);
+	buf[i++] = (u8) ((ns_coeff1_8192nu & 0x00ffc000) >> 16);
+	buf[i++] = (u8) ((ns_coeff1_8192nu & 0x0000ff00) >> 8);
+	buf[i++] = (u8) ((ns_coeff1_8192nu & 0x000000ff));
+	buf[i++] = (u8) ((ns_coeff1_8193nu & 0x03000000) >> 24);
+	buf[i++] = (u8) ((ns_coeff1_8193nu & 0x00ffc000) >> 16);
+	buf[i++] = (u8) ((ns_coeff1_8193nu & 0x0000ff00) >> 8);
+	buf[i++] = (u8) ((ns_coeff1_8193nu & 0x000000ff));
+	buf[i++] = (u8) ((ns_coeff2_8k     & 0x01c00000) >> 22);
+	buf[i++] = (u8) ((ns_coeff2_8k     & 0x003fc000) >> 14);
+	buf[i++] = (u8) ((ns_coeff2_8k     & 0x00003fc0) >> 6);
+	buf[i++] = (u8) ((ns_coeff2_8k     & 0x0000003f));
+
+	deb_info("%s: coeff:", __func__);
+	debug_dump(buf, sizeof(buf), deb_info);
+
+	/* program */
+	for (i = 0; i < sizeof(buf); i++) {
+		ret = af9013_write_reg(state, 0xae00 + i, buf[i]);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int af9013_set_adc_ctrl(struct af9013_state *state)
+{
+	int ret;
+	u8 buf[3], tmp, i;
+	u32 adc_cw;
+
+	deb_info("%s: adc_clock:%d\n", __func__, state->config.adc_clock);
+
+	/* adc frequency type */
+	switch (state->config.adc_clock) {
+	case 28800: /* 28.800 MHz */
+		tmp = 0;
+		break;
+	case 20480: /* 20.480 MHz */
+		tmp = 1;
+		break;
+	case 28000: /* 28.000 MHz */
+		tmp = 2;
+		break;
+	case 25000: /* 25.000 MHz */
+		tmp = 3;
+		break;
+	default:
+		err("invalid xtal");
+		return -EINVAL;
+	}
+
+	adc_cw = af913_div(state->config.adc_clock*1000, 1000000ul, 19ul);
+
+	buf[0] = (u8) ((adc_cw & 0x000000ff));
+	buf[1] = (u8) ((adc_cw & 0x0000ff00) >> 8);
+	buf[2] = (u8) ((adc_cw & 0x00ff0000) >> 16);
+
+	deb_info("%s: adc_cw:", __func__);
+	debug_dump(buf, sizeof(buf), deb_info);
+
+	/* program */
+	for (i = 0; i < sizeof(buf); i++) {
+		ret = af9013_write_reg(state, 0xd180 + i, buf[i]);
+		if (ret)
+			goto error;
+	}
+	ret = af9013_write_reg_bits(state, 0x9bd2, 0, 4, tmp);
+error:
+	return ret;
+}
+
+static int af9013_set_freq_ctrl(struct af9013_state *state, fe_bandwidth_t bw)
+{
+	int ret;
+	u16 addr;
+	u8 buf[3], i, j;
+	u32 adc_freq, freq_cw;
+	s8 bfs_spec_inv;
+	int if_sample_freq;
+
+	for (j = 0; j < 3; j++) {
+		if (j == 0) {
+			addr = 0xd140; /* fcw normal */
+			bfs_spec_inv = state->config.rf_spec_inv ? -1 : 1;
+		} else if (j == 1) {
+			addr = 0x9be7; /* fcw dummy ram */
+			bfs_spec_inv = state->config.rf_spec_inv ? -1 : 1;
+		} else {
+			addr = 0x9bea; /* fcw inverted */
+			bfs_spec_inv = state->config.rf_spec_inv ? 1 : -1;
+		}
+
+		adc_freq       = state->config.adc_clock * 1000;
+		if_sample_freq = state->config.tuner_if * 1000;
+
+		/* TDA18271 uses different sampling freq for every bw */
+		if (state->config.tuner == AF9013_TUNER_TDA18271) {
+			switch (bw) {
+			case BANDWIDTH_6_MHZ:
+				if_sample_freq = 3300000; /* 3.3 MHz */
+				break;
+			case BANDWIDTH_7_MHZ:
+				if_sample_freq = 3800000; /* 3.8 MHz */
+				break;
+			case BANDWIDTH_8_MHZ:
+			default:
+				if_sample_freq = 4300000; /* 4.3 MHz */
+				break;
+			}
+		}
+
+		while (if_sample_freq > (adc_freq / 2))
+			if_sample_freq = if_sample_freq - adc_freq;
+
+		if (if_sample_freq >= 0)
+			bfs_spec_inv = bfs_spec_inv * (-1);
+		else
+			if_sample_freq = if_sample_freq * (-1);
+
+		freq_cw = af913_div(if_sample_freq, adc_freq, 23ul);
+
+		if (bfs_spec_inv == -1)
+			freq_cw = 0x00800000 - freq_cw;
+
+		buf[0] = (u8) ((freq_cw & 0x000000ff));
+		buf[1] = (u8) ((freq_cw & 0x0000ff00) >> 8);
+		buf[2] = (u8) ((freq_cw & 0x007f0000) >> 16);
+
+
+		deb_info("%s: freq_cw:", __func__);
+		debug_dump(buf, sizeof(buf), deb_info);
+
+		/* program */
+		for (i = 0; i < sizeof(buf); i++) {
+			ret = af9013_write_reg(state, addr++, buf[i]);
+			if (ret)
+				goto error;
+		}
+	}
+error:
+	return ret;
+}
+
+static int af9013_set_ofdm_params(struct af9013_state *state,
+	struct dvb_ofdm_parameters *params, u8 *auto_mode)
+{
+	int ret;
+	u8 i, buf[3] = {0, 0, 0};
+	*auto_mode = 0; /* set if parameters are requested to auto set */
+
+	switch (params->transmission_mode) {
+	case TRANSMISSION_MODE_AUTO:
+		*auto_mode = 1;
+	case TRANSMISSION_MODE_2K:
+		break;
+	case TRANSMISSION_MODE_8K:
+		buf[0] |= (1 << 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (params->guard_interval) {
+	case GUARD_INTERVAL_AUTO:
+		*auto_mode = 1;
+	case GUARD_INTERVAL_1_32:
+		break;
+	case GUARD_INTERVAL_1_16:
+		buf[0] |= (1 << 2);
+		break;
+	case GUARD_INTERVAL_1_8:
+		buf[0] |= (2 << 2);
+		break;
+	case GUARD_INTERVAL_1_4:
+		buf[0] |= (3 << 2);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (params->hierarchy_information) {
+	case HIERARCHY_AUTO:
+		*auto_mode = 1;
+	case HIERARCHY_NONE:
+		break;
+	case HIERARCHY_1:
+		buf[0] |= (1 << 4);
+		break;
+	case HIERARCHY_2:
+		buf[0] |= (2 << 4);
+		break;
+	case HIERARCHY_4:
+		buf[0] |= (3 << 4);
+		break;
+	default:
+		return -EINVAL;
+	};
+
+	switch (params->constellation) {
+	case QAM_AUTO:
+		*auto_mode = 1;
+	case QPSK:
+		break;
+	case QAM_16:
+		buf[1] |= (1 << 6);
+		break;
+	case QAM_64:
+		buf[1] |= (2 << 6);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* Use HP. How and which case we can switch to LP? */
+	buf[1] |= (1 << 4);
+
+	switch (params->code_rate_HP) {
+	case FEC_AUTO:
+		*auto_mode = 1;
+	case FEC_1_2:
+		break;
+	case FEC_2_3:
+		buf[2] |= (1 << 0);
+		break;
+	case FEC_3_4:
+		buf[2] |= (2 << 0);
+		break;
+	case FEC_5_6:
+		buf[2] |= (3 << 0);
+		break;
+	case FEC_7_8:
+		buf[2] |= (4 << 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (params->code_rate_LP) {
+	case FEC_AUTO:
+	/* if HIERARCHY_NONE and FEC_NONE then LP FEC is set to FEC_AUTO
+	   by dvb_frontend.c for compatibility */
+		if (params->hierarchy_information != HIERARCHY_NONE)
+			*auto_mode = 1;
+	case FEC_1_2:
+		break;
+	case FEC_2_3:
+		buf[2] |= (1 << 3);
+		break;
+	case FEC_3_4:
+		buf[2] |= (2 << 3);
+		break;
+	case FEC_5_6:
+		buf[2] |= (3 << 3);
+		break;
+	case FEC_7_8:
+		buf[2] |= (4 << 3);
+		break;
+	case FEC_NONE:
+		if (params->hierarchy_information == HIERARCHY_AUTO)
+			break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (params->bandwidth) {
+	case BANDWIDTH_6_MHZ:
+		break;
+	case BANDWIDTH_7_MHZ:
+		buf[1] |= (1 << 2);
+		break;
+	case BANDWIDTH_8_MHZ:
+		buf[1] |= (2 << 2);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/* program */
+	for (i = 0; i < sizeof(buf); i++) {
+		ret = af9013_write_reg(state, 0xd3c0 + i, buf[i]);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int af9013_reset(struct af9013_state *state, u8 sleep)
+{
+	int ret;
+	u8 tmp, i;
+	deb_info("%s\n", __func__);
+
+	/* enable OFDM reset */
+	ret = af9013_write_reg_bits(state, 0xd417, 4, 1, 1);
+	if (ret)
+		goto error;
+
+	/* start reset mechanism */
+	ret = af9013_write_reg(state, 0xaeff, 1);
+	if (ret)
+		goto error;
+
+	/* reset is done when bit 1 is set */
+	for (i = 0; i < 150; i++) {
+		ret = af9013_read_reg_bits(state, 0xd417, 1, 1, &tmp);
+		if (ret)
+			goto error;
+		if (tmp)
+			break; /* reset done */
+		msleep(10);
+	}
+	if (!tmp)
+		return -ETIMEDOUT;
+
+	/* don't clear reset when going to sleep */
+	if (!sleep) {
+		/* clear OFDM reset */
+		ret = af9013_write_reg_bits(state, 0xd417, 1, 1, 0);
+		if (ret)
+			goto error;
+
+		/* disable OFDM reset */
+		ret = af9013_write_reg_bits(state, 0xd417, 4, 1, 0);
+	}
+error:
+	return ret;
+}
+
+static int af9013_power_ctrl(struct af9013_state *state, u8 onoff)
+{
+	int ret;
+	deb_info("%s: onoff:%d\n", __func__, onoff);
+
+	if (onoff) {
+		/* power on */
+		ret = af9013_write_reg_bits(state, 0xd73a, 3, 1, 0);
+		if (ret)
+			goto error;
+		ret = af9013_write_reg_bits(state, 0xd417, 1, 1, 0);
+		if (ret)
+			goto error;
+		ret = af9013_write_reg_bits(state, 0xd417, 4, 1, 0);
+	} else {
+		/* power off */
+		ret = af9013_reset(state, 1);
+		if (ret)
+			goto error;
+		ret = af9013_write_reg_bits(state, 0xd73a, 3, 1, 1);
+	}
+error:
+	return ret;
+}
+
+static int af9013_lock_led(struct af9013_state *state, u8 onoff)
+{
+	deb_info("%s: onoff:%d\n", __func__, onoff);
+
+	return af9013_write_reg_bits(state, 0xd730, 0, 1, onoff);
+}
+
+static int af9013_set_frontend(struct dvb_frontend *fe,
+	struct dvb_frontend_parameters *params)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	u8 auto_mode; /* auto set TPS */
+
+	deb_info("%s: freq:%d bw:%d\n", __func__, params->frequency,
+		params->u.ofdm.bandwidth);
+
+	state->frequency = params->frequency;
+
+	/* program CFOE coefficients */
+	ret = af9013_set_coeff(state, params->u.ofdm.bandwidth);
+	if (ret)
+		goto error;
+
+	/* program frequency control */
+	ret = af9013_set_freq_ctrl(state, params->u.ofdm.bandwidth);
+	if (ret)
+		goto error;
+
+	/* clear TPS lock flag (inverted flag) */
+	ret = af9013_write_reg_bits(state, 0xd330, 3, 1, 1);
+	if (ret)
+		goto error;
+
+	/* clear MPEG2 lock flag */
+	ret = af9013_write_reg_bits(state, 0xd507, 6, 1, 0);
+	if (ret)
+		goto error;
+
+	/* empty channel function */
+	ret = af9013_write_reg_bits(state, 0x9bfe, 0, 1, 0);
+	if (ret)
+		goto error;
+
+	/* empty DVB-T channel function */
+	ret = af9013_write_reg_bits(state, 0x9bc2, 0, 1, 0);
+	if (ret)
+		goto error;
+
+	/* program tuner */
+	if (fe->ops.tuner_ops.set_params)
+		fe->ops.tuner_ops.set_params(fe, params);
+
+	/* program TPS and bandwidth, check if auto mode needed */
+	ret = af9013_set_ofdm_params(state, &params->u.ofdm, &auto_mode);
+	if (ret)
+		goto error;
+
+	if (auto_mode) {
+		/* clear easy mode flag */
+		ret = af9013_write_reg(state, 0xaefd, 0);
+		deb_info("%s: auto TPS\n", __func__);
+	} else {
+		/* set easy mode flag */
+		ret = af9013_write_reg(state, 0xaefd, 1);
+		if (ret)
+			goto error;
+		ret = af9013_write_reg(state, 0xaefe, 0);
+		deb_info("%s: manual TPS\n", __func__);
+	}
+	if (ret)
+		goto error;
+
+	/* everything is set, lets try to receive channel - OFSM GO! */
+	ret = af9013_write_reg(state, 0xffff, 0);
+	if (ret)
+		goto error;
+
+error:
+	return ret;
+}
+
+static int af9013_get_frontend(struct dvb_frontend *fe,
+	struct dvb_frontend_parameters *p)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	u8 i, buf[3];
+	deb_info("%s\n", __func__);
+
+	/* read TPS registers */
+	for (i = 0; i < 3; i++) {
+		ret = af9013_read_reg(state, 0xd3c0 + i, &buf[i]);
+		if (ret)
+			goto error;
+	}
+
+	switch ((buf[1] >> 6) & 3) {
+	case 0:
+		p->u.ofdm.constellation = QPSK;
+		break;
+	case 1:
+		p->u.ofdm.constellation = QAM_16;
+		break;
+	case 2:
+		p->u.ofdm.constellation = QAM_64;
+		break;
+	}
+
+	switch ((buf[0] >> 0) & 3) {
+	case 0:
+		p->u.ofdm.transmission_mode = TRANSMISSION_MODE_2K;
+		break;
+	case 1:
+		p->u.ofdm.transmission_mode = TRANSMISSION_MODE_8K;
+	}
+
+	switch ((buf[0] >> 2) & 3) {
+	case 0:
+		p->u.ofdm.guard_interval = GUARD_INTERVAL_1_32;
+		break;
+	case 1:
+		p->u.ofdm.guard_interval = GUARD_INTERVAL_1_16;
+		break;
+	case 2:
+		p->u.ofdm.guard_interval = GUARD_INTERVAL_1_8;
+		break;
+	case 3:
+		p->u.ofdm.guard_interval = GUARD_INTERVAL_1_4;
+		break;
+	}
+
+	switch ((buf[0] >> 4) & 7) {
+	case 0:
+		p->u.ofdm.hierarchy_information = HIERARCHY_NONE;
+		break;
+	case 1:
+		p->u.ofdm.hierarchy_information = HIERARCHY_1;
+		break;
+	case 2:
+		p->u.ofdm.hierarchy_information = HIERARCHY_2;
+		break;
+	case 3:
+		p->u.ofdm.hierarchy_information = HIERARCHY_4;
+		break;
+	}
+
+	switch ((buf[2] >> 0) & 7) {
+	case 0:
+		p->u.ofdm.code_rate_HP = FEC_1_2;
+		break;
+	case 1:
+		p->u.ofdm.code_rate_HP = FEC_2_3;
+		break;
+	case 2:
+		p->u.ofdm.code_rate_HP = FEC_3_4;
+		break;
+	case 3:
+		p->u.ofdm.code_rate_HP = FEC_5_6;
+		break;
+	case 4:
+		p->u.ofdm.code_rate_HP = FEC_7_8;
+		break;
+	}
+
+	switch ((buf[2] >> 3) & 7) {
+	case 0:
+		p->u.ofdm.code_rate_LP = FEC_1_2;
+		break;
+	case 1:
+		p->u.ofdm.code_rate_LP = FEC_2_3;
+		break;
+	case 2:
+		p->u.ofdm.code_rate_LP = FEC_3_4;
+		break;
+	case 3:
+		p->u.ofdm.code_rate_LP = FEC_5_6;
+		break;
+	case 4:
+		p->u.ofdm.code_rate_LP = FEC_7_8;
+		break;
+	}
+
+	switch ((buf[1] >> 2) & 3) {
+	case 0:
+		p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ;
+		break;
+	case 1:
+		p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ;
+		break;
+	case 2:
+		p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;
+		break;
+	}
+
+	p->inversion = INVERSION_AUTO;
+	p->frequency = state->frequency;
+
+error:
+	return ret;
+}
+
+static int af9013_update_ber_unc(struct dvb_frontend *fe)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	u8 buf[3], i;
+	u32 error_bit_count = 0;
+	u32 total_bit_count = 0;
+	u32 abort_packet_count = 0;
+	u64 numerator, denominator;
+
+	state->ber = 0;
+
+	/* check if error bit count is ready */
+	ret = af9013_read_reg_bits(state, 0xd391, 4, 1, &buf[0]);
+	if (ret)
+		goto error;
+	if (!buf[0])
+		goto exit;
+
+	/* get RSD packet abort count */
+	for (i = 0; i < 2; i++) {
+		ret = af9013_read_reg(state, 0xd38a + i, &buf[i]);
+		if (ret)
+			goto error;
+	}
+	abort_packet_count = (buf[1] << 8) + buf[0];
+
+	/* get error bit count */
+	for (i = 0; i < 3; i++) {
+		ret = af9013_read_reg(state, 0xd387 + i, &buf[i]);
+		if (ret)
+			goto error;
+	}
+	error_bit_count = (buf[2] << 16) + (buf[1] << 8) + buf[0];
+	error_bit_count = error_bit_count - abort_packet_count * 8 * 8;
+
+	/* get used RSD counting period (10000 RSD packets used) */
+	for (i = 0; i < 2; i++) {
+		ret = af9013_read_reg(state, 0xd385 + i, &buf[i]);
+		if (ret)
+			goto error;
+	}
+	total_bit_count = (buf[1] << 8) + buf[0];
+	total_bit_count = total_bit_count - abort_packet_count;
+	total_bit_count = total_bit_count * 204 * 8;
+
+	if (total_bit_count) {
+		numerator = error_bit_count * 1000000000;
+		denominator = total_bit_count;
+		state->ber = numerator / denominator;
+	}
+
+	state->ucblocks += abort_packet_count;
+
+	deb_info("%s: err bits:%d total bits:%d abort count:%d\n", __func__,
+		error_bit_count, total_bit_count, abort_packet_count);
+
+	/* set BER counting range */
+	ret = af9013_write_reg(state, 0xd385, 10000 & 0xff);
+	if (ret)
+		goto error;
+	ret = af9013_write_reg(state, 0xd386, 10000 >> 8);
+	if (ret)
+		goto error;
+	/* reset and start BER counter */
+	ret = af9013_write_reg_bits(state, 0xd391, 4, 1, 1);
+	if (ret)
+		goto error;
+
+exit:
+error:
+	return ret;
+}
+
+static int af9013_update_snr(struct dvb_frontend *fe)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	u8 buf[3], i, len;
+	u32 quant = 0;
+	struct snr_table *snr_table;
+
+	/* check if quantizer ready (for snr) */
+	ret = af9013_read_reg_bits(state, 0xd2e1, 3, 1, &buf[0]);
+	if (ret)
+		goto error;
+	if (buf[0]) {
+		/* quantizer ready - read it */
+		for (i = 0; i < 3; i++) {
+			ret = af9013_read_reg(state, 0xd2e3 + i, &buf[i]);
+			if (ret)
+				goto error;
+		}
+		quant = (buf[2] << 16) + (buf[1] << 8) + buf[0];
+
+		/* read current constellation */
+		ret = af9013_read_reg(state, 0xd3c1, &buf[0]);
+		if (ret)
+			goto error;
+
+		switch ((buf[0] >> 6) & 3) {
+		case 0:
+			len = ARRAY_SIZE(qpsk_snr_table);
+			snr_table = qpsk_snr_table;
+			break;
+		case 1:
+			len = ARRAY_SIZE(qam16_snr_table);
+			snr_table = qam16_snr_table;
+			break;
+		case 2:
+			len = ARRAY_SIZE(qam64_snr_table);
+			snr_table = qam64_snr_table;
+			break;
+		default:
+			len = 0;
+			break;
+		}
+
+		if (len) {
+			for (i = 0; i < len; i++) {
+				if (quant < snr_table[i].val) {
+					state->snr = snr_table[i].snr * 10;
+					break;
+				}
+			}
+		}
+
+		/* set quantizer super frame count */
+		ret = af9013_write_reg(state, 0xd2e2, 1);
+		if (ret)
+			goto error;
+
+		/* check quantizer availability */
+		for (i = 0; i < 10; i++) {
+			msleep(10);
+			ret = af9013_read_reg_bits(state, 0xd2e6, 0, 1,
+				&buf[0]);
+			if (ret)
+				goto error;
+			if (!buf[0])
+				break;
+		}
+
+		/* reset quantizer */
+		ret = af9013_write_reg_bits(state, 0xd2e1, 3, 1, 1);
+		if (ret)
+			goto error;
+	}
+
+error:
+	return ret;
+}
+
+static int af9013_update_signal_strength(struct dvb_frontend *fe)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	u8 tmp0;
+	u8 rf_gain, rf_50, rf_80, if_gain, if_50, if_80;
+	int signal_strength;
+
+	deb_info("%s\n", __func__);
+
+	state->signal_strength = 0;
+
+	ret = af9013_read_reg_bits(state, 0x9bee, 0, 1, &tmp0);
+	if (ret)
+		goto error;
+	if (tmp0) {
+		ret = af9013_read_reg(state, 0x9bbd, &rf_50);
+		if (ret)
+			goto error;
+		ret = af9013_read_reg(state, 0x9bd0, &rf_80);
+		if (ret)
+			goto error;
+		ret = af9013_read_reg(state, 0x9be2, &if_50);
+		if (ret)
+			goto error;
+		ret = af9013_read_reg(state, 0x9be4, &if_80);
+		if (ret)
+			goto error;
+		ret = af9013_read_reg(state, 0xd07c, &rf_gain);
+		if (ret)
+			goto error;
+		ret = af9013_read_reg(state, 0xd07d, &if_gain);
+		if (ret)
+			goto error;
+		signal_strength = (0xffff / (9 * (rf_50 + if_50) - \
+			11 * (rf_80 + if_80))) * (10 * (rf_gain + if_gain) - \
+			11 * (rf_80 + if_80));
+		if (signal_strength < 0)
+			signal_strength = 0;
+		else if (signal_strength > 0xffff)
+			signal_strength = 0xffff;
+
+		state->signal_strength = signal_strength;
+	}
+
+error:
+	return ret;
+}
+
+static int af9013_update_statistics(struct dvb_frontend *fe)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+
+	if (time_before(jiffies, state->next_statistics_check))
+		return 0;
+
+	/* set minimum statistic update interval */
+	state->next_statistics_check = jiffies + msecs_to_jiffies(1200);
+
+	ret = af9013_update_signal_strength(fe);
+	if (ret)
+		goto error;
+	ret = af9013_update_snr(fe);
+	if (ret)
+		goto error;
+	ret = af9013_update_ber_unc(fe);
+	if (ret)
+		goto error;
+
+error:
+	return ret;
+}
+
+static int af9013_get_tune_settings(struct dvb_frontend *fe,
+	struct dvb_frontend_tune_settings *fesettings)
+{
+	fesettings->min_delay_ms = 800;
+	fesettings->step_size = 0;
+	fesettings->max_drift = 0;
+
+	return 0;
+}
+
+static int af9013_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret = 0;
+	u8 tmp;
+	*status = 0;
+
+	/* TPS lock */
+	ret = af9013_read_reg_bits(state, 0xd330, 3, 1, &tmp);
+	if (ret)
+		goto error;
+	if (tmp)
+		*status |= FE_HAS_VITERBI | FE_HAS_CARRIER | FE_HAS_SIGNAL;
+
+	/* MPEG2 lock */
+	ret = af9013_read_reg_bits(state, 0xd507, 6, 1, &tmp);
+	if (ret)
+		goto error;
+	if (tmp)
+		*status |= FE_HAS_SYNC | FE_HAS_LOCK;
+
+	if (!*status & FE_HAS_SIGNAL) {
+		/* AGC lock */
+		ret = af9013_read_reg_bits(state, 0xd1a0, 6, 1, &tmp);
+		if (ret)
+			goto error;
+		if (tmp)
+			*status |= FE_HAS_SIGNAL;
+	}
+
+	if (!*status & FE_HAS_CARRIER) {
+		/* CFO lock */
+		ret = af9013_read_reg_bits(state, 0xd333, 7, 1, &tmp);
+		if (ret)
+			goto error;
+		if (tmp)
+			*status |= FE_HAS_CARRIER;
+	}
+
+	if (!*status & FE_HAS_CARRIER) {
+		/* SFOE lock */
+		ret = af9013_read_reg_bits(state, 0xd334, 6, 1, &tmp);
+		if (ret)
+			goto error;
+		if (tmp)
+			*status |= FE_HAS_CARRIER;
+	}
+
+	ret = af9013_update_statistics(fe);
+
+error:
+	return ret;
+}
+
+
+static int af9013_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	ret = af9013_update_statistics(fe);
+	*ber = state->ber;
+	return ret;
+}
+
+static int af9013_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	ret = af9013_update_statistics(fe);
+	*strength = state->signal_strength;
+	return ret;
+}
+
+static int af9013_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	ret = af9013_update_statistics(fe);
+	*snr = state->snr;
+	return ret;
+}
+
+static int af9013_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	ret = af9013_update_statistics(fe);
+	*ucblocks = state->ucblocks;
+	return ret;
+}
+
+static int af9013_sleep(struct dvb_frontend *fe)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret;
+	deb_info("%s\n", __func__);
+
+	ret = af9013_lock_led(state, 0);
+	if (ret)
+		goto error;
+
+	ret = af9013_power_ctrl(state, 0);
+error:
+	return ret;
+}
+
+static int af9013_init(struct dvb_frontend *fe)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	int ret, i, len;
+	u8 tmp0, tmp1;
+	struct regdesc *init;
+	deb_info("%s\n", __func__);
+
+	/* reset OFDM */
+	ret = af9013_reset(state, 0);
+	if (ret)
+		goto error;
+
+	/* power on */
+	ret = af9013_power_ctrl(state, 1);
+	if (ret)
+		goto error;
+
+	/* enable ADC */
+	ret = af9013_write_reg(state, 0xd73a, 0xa4);
+	if (ret)
+		goto error;
+
+	/* write API version to firmware */
+	for (i = 0; i < sizeof(state->config.api_version); i++) {
+		ret = af9013_write_reg(state, 0x9bf2 + i,
+			state->config.api_version[i]);
+		if (ret)
+			goto error;
+	}
+
+	/* program ADC control */
+	ret = af9013_set_adc_ctrl(state);
+	if (ret)
+		goto error;
+
+	/* set I2C master clock */
+	ret = af9013_write_reg(state, 0xd416, 0x14);
+	if (ret)
+		goto error;
+
+	/* set 16 embx */
+	ret = af9013_write_reg_bits(state, 0xd700, 1, 1, 1);
+	if (ret)
+		goto error;
+
+	/* set no trigger */
+	ret = af9013_write_reg_bits(state, 0xd700, 2, 1, 0);
+	if (ret)
+		goto error;
+
+	/* set read-update bit for constellation */
+	ret = af9013_write_reg_bits(state, 0xd371, 1, 1, 1);
+	if (ret)
+		goto error;
+
+	/* enable FEC monitor */
+	ret = af9013_write_reg_bits(state, 0xd392, 1, 1, 1);
+	if (ret)
+		goto error;
+
+	/* load OFSM settings */
+	deb_info("%s: load ofsm settings\n", __func__);
+	len = ARRAY_SIZE(ofsm_init);
+	init = ofsm_init;
+	for (i = 0; i < len; i++) {
+		ret = af9013_write_reg_bits(state, init[i].addr, init[i].pos,
+			init[i].len, init[i].val);
+		if (ret)
+			goto error;
+	}
+
+	/* load tuner specific settings */
+	deb_info("%s: load tuner specific settings\n", __func__);
+	switch (state->config.tuner) {
+	case AF9013_TUNER_MXL5003D:
+		len = ARRAY_SIZE(tuner_init_mxl5003d);
+		init = tuner_init_mxl5003d;
+		break;
+	case AF9013_TUNER_MXL5005D:
+	case AF9013_TUNER_MXL5005R:
+		len = ARRAY_SIZE(tuner_init_mxl5005);
+		init = tuner_init_mxl5005;
+		break;
+	case AF9013_TUNER_ENV77H11D5:
+		len = ARRAY_SIZE(tuner_init_env77h11d5);
+		init = tuner_init_env77h11d5;
+		break;
+	case AF9013_TUNER_MT2060:
+		len = ARRAY_SIZE(tuner_init_mt2060);
+		init = tuner_init_mt2060;
+		break;
+	case AF9013_TUNER_MC44S803:
+		len = ARRAY_SIZE(tuner_init_mc44s803);
+		init = tuner_init_mc44s803;
+		break;
+	case AF9013_TUNER_QT1010:
+	case AF9013_TUNER_QT1010A:
+		len = ARRAY_SIZE(tuner_init_qt1010);
+		init = tuner_init_qt1010;
+		break;
+	case AF9013_TUNER_MT2060_2:
+		len = ARRAY_SIZE(tuner_init_mt2060_2);
+		init = tuner_init_mt2060_2;
+		break;
+	case AF9013_TUNER_TDA18271:
+		len = ARRAY_SIZE(tuner_init_tda18271);
+		init = tuner_init_tda18271;
+		break;
+	case AF9013_TUNER_UNKNOWN:
+	default:
+		len = ARRAY_SIZE(tuner_init_unknown);
+		init = tuner_init_unknown;
+		break;
+	}
+
+	for (i = 0; i < len; i++) {
+		ret = af9013_write_reg_bits(state, init[i].addr, init[i].pos,
+			init[i].len, init[i].val);
+		if (ret)
+			goto error;
+	}
+
+	/* set TS mode */
+	deb_info("%s: setting ts mode\n", __func__);
+	tmp0 = 0; /* parallel mode */
+	tmp1 = 0; /* serial mode */
+	switch (state->config.output_mode) {
+	case AF9013_OUTPUT_MODE_PARALLEL:
+		tmp0 = 1;
+		break;
+	case AF9013_OUTPUT_MODE_SERIAL:
+		tmp1 = 1;
+		break;
+	case AF9013_OUTPUT_MODE_USB:
+		/* usb mode for AF9015 */
+	default:
+		break;
+	}
+	ret = af9013_write_reg_bits(state, 0xd500, 1, 1, tmp0); /* parallel */
+	if (ret)
+		goto error;
+	ret = af9013_write_reg_bits(state, 0xd500, 2, 1, tmp1); /* serial */
+	if (ret)
+		goto error;
+
+	/* enable lock led */
+	ret = af9013_lock_led(state, 1);
+	if (ret)
+		goto error;
+
+error:
+	return ret;
+}
+
+static struct dvb_frontend_ops af9013_ops;
+
+static int af9013_download_firmware(struct af9013_state *state)
+{
+	int i, len, packets, remainder, ret;
+	const struct firmware *fw;
+	u16 addr = 0x5100; /* firmware start address */
+	u16 checksum = 0;
+	u8 val;
+	u8 fw_params[4];
+	u8 *data;
+	u8 *fw_file = AF9013_DEFAULT_FIRMWARE;
+
+	msleep(100);
+	/* check whether firmware is already running */
+	ret = af9013_read_reg(state, 0x98be, &val);
+	if (ret)
+		goto error;
+	else
+		deb_info("%s: firmware status:%02x\n", __func__, val);
+
+	if (val == 0x0c) /* fw is running, no need for download */
+		goto exit;
+
+	info("found a '%s' in cold state, will try to load a firmware",
+		af9013_ops.info.name);
+
+	/* request the firmware, this will block and timeout */
+	ret = request_firmware(&fw, fw_file,  &state->i2c->dev);
+	if (ret) {
+		err("did not find the firmware file. (%s) "
+			"Please see linux/Documentation/dvb/ for more details" \
+			" on firmware-problems. (%d)",
+			fw_file, ret);
+		goto error;
+	}
+
+	info("downloading firmware from file '%s'", fw_file);
+
+	/* calc checksum */
+	for (i = 0; i < fw->size; i++)
+		checksum += fw->data[i];
+
+	fw_params[0] = checksum >> 8;
+	fw_params[1] = checksum & 0xff;
+	fw_params[2] = fw->size >> 8;
+	fw_params[3] = fw->size & 0xff;
+
+	/* write fw checksum & size */
+	ret = af9013_write_ofsm_regs(state, 0x50fc,
+		fw_params, sizeof(fw_params));
+	if (ret)
+		goto error_release;
+
+	#define FW_PACKET_MAX_DATA  16
+
+	packets = fw->size / FW_PACKET_MAX_DATA;
+	remainder = fw->size % FW_PACKET_MAX_DATA;
+	len = FW_PACKET_MAX_DATA;
+	for (i = 0; i <= packets; i++) {
+		if (i == packets)  /* set size of the last packet */
+			len = remainder;
+
+		data = (fw->data + i * FW_PACKET_MAX_DATA);
+		ret = af9013_write_ofsm_regs(state, addr, data, len);
+		addr += FW_PACKET_MAX_DATA;
+
+		if (ret) {
+			err("firmware download failed at %d with %d", i, ret);
+			goto error_release;
+		}
+	}
+
+	#undef FW_PACKET_MAX_DATA
+
+	/* request boot firmware */
+	ret = af9013_write_reg(state, 0xe205, 1);
+	if (ret)
+		goto error_release;
+
+	for (i = 0; i < 15; i++) {
+		msleep(100);
+
+		/* check firmware status */
+		ret = af9013_read_reg(state, 0x98be, &val);
+		if (ret)
+			goto error_release;
+
+		deb_info("%s: firmware status:%02x\n", __func__, val);
+
+		if (val == 0x0c || val == 0x04) /* success or fail */
+			break;
+	}
+
+	if (val == 0x04) {
+		err("firmware did not run");
+		ret = -1;
+	} else if (val != 0x0c) {
+		err("firmware boot timeout");
+		ret = -1;
+	}
+
+error_release:
+	release_firmware(fw);
+error:
+exit:
+	if (!ret)
+		info("found a '%s' in warm state.", af9013_ops.info.name);
+	return ret;
+}
+
+static int af9013_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+	int ret;
+	struct af9013_state *state = fe->demodulator_priv;
+	deb_info("%s: enable:%d\n", __func__, enable);
+
+	if (state->config.output_mode == AF9013_OUTPUT_MODE_USB)
+		ret = af9013_write_reg_bits(state, 0xd417, 3, 1, enable);
+	else
+		ret = af9013_write_reg_bits(state, 0xd607, 2, 1, enable);
+
+	return ret;
+}
+
+static void af9013_release(struct dvb_frontend *fe)
+{
+	struct af9013_state *state = fe->demodulator_priv;
+	kfree(state);
+}
+
+static struct dvb_frontend_ops af9013_ops;
+
+struct dvb_frontend *af9013_attach(const struct af9013_config *config,
+	struct i2c_adapter *i2c)
+{
+	int ret;
+	struct af9013_state *state = NULL;
+	u8 buf[3], i;
+
+	/* allocate memory for the internal state */
+	state = kzalloc(sizeof(struct af9013_state), GFP_KERNEL);
+	if (state == NULL)
+		goto error;
+
+	/* setup the state */
+	state->i2c = i2c;
+	memcpy(&state->config, config, sizeof(struct af9013_config));
+
+	/* chip version */
+	ret = af9013_read_reg_bits(state, 0xd733, 4, 4, &buf[2]);
+	if (ret)
+		goto error;
+
+	/* ROM version */
+	for (i = 0; i < 2; i++) {
+		ret = af9013_read_reg(state, 0x116b + i, &buf[i]);
+		if (ret)
+			goto error;
+	}
+	deb_info("%s: chip version:%d ROM version:%d.%d\n", __func__,
+		buf[2], buf[0], buf[1]);
+
+	/* download firmware */
+	if (state->config.output_mode != AF9013_OUTPUT_MODE_USB) {
+		ret = af9013_download_firmware(state);
+		if (ret)
+			goto error;
+	}
+
+	/* firmware version */
+	for (i = 0; i < 3; i++) {
+		ret = af9013_read_reg(state, 0x5103 + i, &buf[i]);
+		if (ret)
+			goto error;
+	}
+	info("firmware version:%d.%d.%d", buf[0], buf[1], buf[2]);
+
+	/* settings for mp2if */
+	if (state->config.output_mode == AF9013_OUTPUT_MODE_USB) {
+		/* AF9015 split PSB to 1.5k + 0.5k */
+		ret = af9013_write_reg_bits(state, 0xd50b, 2, 1, 1);
+	} else {
+		/* AF9013 change the output bit to data7 */
+		ret = af9013_write_reg_bits(state, 0xd500, 3, 1, 1);
+		if (ret)
+			goto error;
+		/* AF9013 set mpeg to full speed */
+		ret = af9013_write_reg_bits(state, 0xd502, 4, 1, 1);
+	}
+	if (ret)
+		goto error;
+	ret = af9013_write_reg_bits(state, 0xd520, 4, 1, 1);
+	if (ret)
+		goto error;
+
+	/* set GPIOs */
+	for (i = 0; i < sizeof(state->config.gpio); i++) {
+		ret = af9013_set_gpio(state, i, state->config.gpio[i]);
+		if (ret)
+			goto error;
+	}
+
+	/* create dvb_frontend */
+	memcpy(&state->frontend.ops, &af9013_ops,
+		sizeof(struct dvb_frontend_ops));
+	state->frontend.demodulator_priv = state;
+
+	return &state->frontend;
+error:
+	kfree(state);
+	return NULL;
+}
+EXPORT_SYMBOL(af9013_attach);
+
+static struct dvb_frontend_ops af9013_ops = {
+	.info = {
+		.name = "Afatech AF9013 DVB-T",
+		.type = FE_OFDM,
+		.frequency_min = 174000000,
+		.frequency_max = 862000000,
+		.frequency_stepsize = 250000,
+		.frequency_tolerance = 0,
+		.caps =
+			FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
+			FE_CAN_QPSK | FE_CAN_QAM_16 |
+			FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
+			FE_CAN_TRANSMISSION_MODE_AUTO |
+			FE_CAN_GUARD_INTERVAL_AUTO |
+			FE_CAN_HIERARCHY_AUTO |
+			FE_CAN_RECOVER |
+			FE_CAN_MUTE_TS
+	},
+
+	.release = af9013_release,
+	.init = af9013_init,
+	.sleep = af9013_sleep,
+	.i2c_gate_ctrl = af9013_i2c_gate_ctrl,
+
+	.set_frontend = af9013_set_frontend,
+	.get_frontend = af9013_get_frontend,
+
+	.get_tune_settings = af9013_get_tune_settings,
+
+	.read_status = af9013_read_status,
+	.read_ber = af9013_read_ber,
+	.read_signal_strength = af9013_read_signal_strength,
+	.read_snr = af9013_read_snr,
+	.read_ucblocks = af9013_read_ucblocks,
+};
+
+module_param_named(debug, af9013_debug, int, 0644);
+MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Afatech AF9013 DVB-T demodulator driver");
+MODULE_LICENSE("GPL");