V4L/DVB (12900): DiB8000: added support for DiBcom ISDB-T/ISDB-Tsb demodulator DiB8000

This commit adds support for the DiB8000 ISDB-T demodulator made by DiBcom.

Signed-off-by: Olivier Grenie <Olivier.Grenie@dibcom.fr>
Signed-off-by: Patrick Boettcher <pboettcher@dibcom.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

7 files changed, 2449 insertions, 47 deletions

diff --git a/drivers/media/dvb/dvb-usb/Kconfig b/drivers/media/dvb/dvb-usb/Kconfig
index 8b8bc04ee98..c5ec9a5f3b3 100644
--- a/drivers/media/dvb/dvb-usb/Kconfig
+++ b/drivers/media/dvb/dvb-usb/Kconfig
@@ -71,6 +71,7 @@ config DVB_USB_DIB0700
 	depends on DVB_USB
 	select DVB_DIB7000P if !DVB_FE_CUSTOMISE
 	select DVB_DIB7000M if !DVB_FE_CUSTOMISE
+	select DVB_DIB8000 if !DVB_FE_CUSTOMISE
 	select DVB_DIB3000MC if !DVB_FE_CUSTOMISE
 	select DVB_S5H1411 if !DVB_FE_CUSTOMISE
 	select DVB_LGDT3305 if !DVB_FE_CUSTOMISE
@@ -87,7 +88,7 @@ config DVB_USB_DIB0700
 	  Avermedia and other big and small companies.
 
 	  For an up-to-date list of devices supported by this driver, have a look
-	  on the Linux-DVB Wiki at www.linuxtv.org.
+	  on the LinuxTV Wiki at www.linuxtv.org.
 
 	  Say Y if you own such a device and want to use it. You should build it as
 	  a module.
diff --git a/drivers/media/dvb/frontends/Kconfig b/drivers/media/dvb/frontends/Kconfig
index b794e860b4e..d7c4837fa71 100644
--- a/drivers/media/dvb/frontends/Kconfig
+++ b/drivers/media/dvb/frontends/Kconfig
@@ -484,6 +484,14 @@ config DVB_S921
 	  AN ISDB-T DQPSK, QPSK, 16QAM and 64QAM 1seg tuner module.
 	  Say Y when you want to support this frontend.
 
+config DVB_DIB8000
+	tristate "DiBcom 8000MB/MC"
+	depends on DVB_CORE && I2C
+	default m if DVB_FE_CUSTOMISE
+	help
+	  A driver for DiBcom's DiB8000 ISDB-T/ISDB-Tsb demodulator.
+	  Say Y when you want to support this frontend.
+
 comment "Digital terrestrial only tuners/PLL"
 	depends on DVB_CORE
 
diff --git a/drivers/media/dvb/frontends/Makefile b/drivers/media/dvb/frontends/Makefile
index 3b49d37ab5f..3523767e7a7 100644
--- a/drivers/media/dvb/frontends/Makefile
+++ b/drivers/media/dvb/frontends/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_DVB_DIB3000MB) += dib3000mb.o
 obj-$(CONFIG_DVB_DIB3000MC) += dib3000mc.o dibx000_common.o
 obj-$(CONFIG_DVB_DIB7000M) += dib7000m.o dibx000_common.o
 obj-$(CONFIG_DVB_DIB7000P) += dib7000p.o dibx000_common.o
+obj-$(CONFIG_DVB_DIB8000) += dib8000.o dibx000_common.o
 obj-$(CONFIG_DVB_MT312) += mt312.o
 obj-$(CONFIG_DVB_VES1820) += ves1820.o
 obj-$(CONFIG_DVB_VES1X93) += ves1x93.o
diff --git a/drivers/media/dvb/frontends/dib8000.c b/drivers/media/dvb/frontends/dib8000.c
new file mode 100644
index 00000000000..99ee6b09ce1
--- /dev/null
+++ b/drivers/media/dvb/frontends/dib8000.c
@@ -0,0 +1,2279 @@
+/*
+ * Linux-DVB Driver for DiBcom's DiB8000 chip (ISDB-T).
+ *
+ * Copyright (C) 2009 DiBcom (http://www.dibcom.fr/)
+ *
+ * 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, version 2.
+ */
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include "dvb_math.h"
+
+#include "dvb_frontend.h"
+
+#include "dib8000.h"
+
+#define LAYER_ALL -1
+#define LAYER_A   1
+#define LAYER_B   2
+#define LAYER_C   3
+
+#define FE_CALLBACK_TIME_NEVER 0xffffffff
+
+static int debug = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
+
+#define dprintk(args...) do { if (debug) { printk(KERN_DEBUG "DiB8000: "); printk(args); printk("\n"); } } while (0)
+
+enum frontend_tune_state {
+	CT_AGC_START = 20,
+	CT_AGC_STEP_0,
+	CT_AGC_STEP_1,
+	CT_AGC_STEP_2,
+	CT_AGC_STEP_3,
+	CT_AGC_STEP_4,
+	CT_AGC_STOP,
+
+	CT_DEMOD_START = 30,
+};
+
+#define FE_STATUS_TUNE_FAILED 0
+
+struct i2c_device {
+	struct i2c_adapter *adap;
+	u8 addr;
+};
+
+struct dib8000_state {
+	struct dvb_frontend fe;
+	struct dib8000_config cfg;
+
+	struct i2c_device i2c;
+
+	struct dibx000_i2c_master i2c_master;
+
+	u16 wbd_ref;
+
+	u8 current_band;
+	u32 current_bandwidth;
+	struct dibx000_agc_config *current_agc;
+	u32 timf;
+	u32 timf_default;
+
+	u8 div_force_off:1;
+	u8 div_state:1;
+	u16 div_sync_wait;
+
+	u8 agc_state;
+	u8 differential_constellation;
+	u8 diversity_onoff;
+
+	s16 ber_monitored_layer;
+	u16 gpio_dir;
+	u16 gpio_val;
+
+	u16 revision;
+	u8 isdbt_cfg_loaded;
+	enum frontend_tune_state tune_state;
+	u32 status;
+};
+
+enum dib8000_power_mode {
+	DIB8000M_POWER_ALL = 0,
+	DIB8000M_POWER_INTERFACE_ONLY,
+};
+
+static u16 dib8000_i2c_read16(struct i2c_device *i2c, u16 reg)
+{
+	u8 wb[2] = { reg >> 8, reg & 0xff };
+	u8 rb[2];
+	struct i2c_msg msg[2] = {
+		{.addr = i2c->addr >> 1,.flags = 0,.buf = wb,.len = 2},
+		{.addr = i2c->addr >> 1,.flags = I2C_M_RD,.buf = rb,.len = 2},
+	};
+
+	if (i2c_transfer(i2c->adap, msg, 2) != 2)
+		dprintk("i2c read error on %d", reg);
+
+	return (rb[0] << 8) | rb[1];
+}
+
+static u16 dib8000_read_word(struct dib8000_state *state, u16 reg)
+{
+	return dib8000_i2c_read16(&state->i2c, reg);
+}
+
+static u32 dib8000_read32(struct dib8000_state *state, u16 reg)
+{
+	u16 rw[2];
+
+	rw[0] = dib8000_read_word(state, reg + 0);
+	rw[1] = dib8000_read_word(state, reg + 1);
+
+	return ((rw[0] << 16) | (rw[1]));
+}
+
+static int dib8000_i2c_write16(struct i2c_device *i2c, u16 reg, u16 val)
+{
+	u8 b[4] = {
+		(reg >> 8) & 0xff, reg & 0xff,
+		(val >> 8) & 0xff, val & 0xff,
+	};
+	struct i2c_msg msg = {
+		.addr = i2c->addr >> 1,.flags = 0,.buf = b,.len = 4
+	};
+	return i2c_transfer(i2c->adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
+}
+
+static int dib8000_write_word(struct dib8000_state *state, u16 reg, u16 val)
+{
+	return dib8000_i2c_write16(&state->i2c, reg, val);
+}
+
+const int16_t coeff_2k_sb_1seg_dqpsk[8] = {
+	(769 << 5) | 0x0a, (745 << 5) | 0x03, (595 << 5) | 0x0d, (769 << 5) | 0x0a, (920 << 5) | 0x09, (784 << 5) | 0x02, (519 << 5) | 0x0c,
+	    (920 << 5) | 0x09
+};
+
+const int16_t coeff_2k_sb_1seg[8] = {
+	(692 << 5) | 0x0b, (683 << 5) | 0x01, (519 << 5) | 0x09, (692 << 5) | 0x0b, 0 | 0x1f, 0 | 0x1f, 0 | 0x1f, 0 | 0x1f
+};
+
+const int16_t coeff_2k_sb_3seg_0dqpsk_1dqpsk[8] = {
+	(832 << 5) | 0x10, (912 << 5) | 0x05, (900 << 5) | 0x12, (832 << 5) | 0x10, (-931 << 5) | 0x0f, (912 << 5) | 0x04, (807 << 5) | 0x11,
+	    (-931 << 5) | 0x0f
+};
+
+const int16_t coeff_2k_sb_3seg_0dqpsk[8] = {
+	(622 << 5) | 0x0c, (941 << 5) | 0x04, (796 << 5) | 0x10, (622 << 5) | 0x0c, (982 << 5) | 0x0c, (519 << 5) | 0x02, (572 << 5) | 0x0e,
+	    (982 << 5) | 0x0c
+};
+
+const int16_t coeff_2k_sb_3seg_1dqpsk[8] = {
+	(699 << 5) | 0x14, (607 << 5) | 0x04, (944 << 5) | 0x13, (699 << 5) | 0x14, (-720 << 5) | 0x0d, (640 << 5) | 0x03, (866 << 5) | 0x12,
+	    (-720 << 5) | 0x0d
+};
+
+const int16_t coeff_2k_sb_3seg[8] = {
+	(664 << 5) | 0x0c, (925 << 5) | 0x03, (937 << 5) | 0x10, (664 << 5) | 0x0c, (-610 << 5) | 0x0a, (697 << 5) | 0x01, (836 << 5) | 0x0e,
+	    (-610 << 5) | 0x0a
+};
+
+const int16_t coeff_4k_sb_1seg_dqpsk[8] = {
+	(-955 << 5) | 0x0e, (687 << 5) | 0x04, (818 << 5) | 0x10, (-955 << 5) | 0x0e, (-922 << 5) | 0x0d, (750 << 5) | 0x03, (665 << 5) | 0x0f,
+	    (-922 << 5) | 0x0d
+};
+
+const int16_t coeff_4k_sb_1seg[8] = {
+	(638 << 5) | 0x0d, (683 << 5) | 0x02, (638 << 5) | 0x0d, (638 << 5) | 0x0d, (-655 << 5) | 0x0a, (517 << 5) | 0x00, (698 << 5) | 0x0d,
+	    (-655 << 5) | 0x0a
+};
+
+const int16_t coeff_4k_sb_3seg_0dqpsk_1dqpsk[8] = {
+	(-707 << 5) | 0x14, (910 << 5) | 0x06, (889 << 5) | 0x16, (-707 << 5) | 0x14, (-958 << 5) | 0x13, (993 << 5) | 0x05, (523 << 5) | 0x14,
+	    (-958 << 5) | 0x13
+};
+
+const int16_t coeff_4k_sb_3seg_0dqpsk[8] = {
+	(-723 << 5) | 0x13, (910 << 5) | 0x05, (777 << 5) | 0x14, (-723 << 5) | 0x13, (-568 << 5) | 0x0f, (547 << 5) | 0x03, (696 << 5) | 0x12,
+	    (-568 << 5) | 0x0f
+};
+
+const int16_t coeff_4k_sb_3seg_1dqpsk[8] = {
+	(-940 << 5) | 0x15, (607 << 5) | 0x05, (915 << 5) | 0x16, (-940 << 5) | 0x15, (-848 << 5) | 0x13, (683 << 5) | 0x04, (543 << 5) | 0x14,
+	    (-848 << 5) | 0x13
+};
+
+const int16_t coeff_4k_sb_3seg[8] = {
+	(612 << 5) | 0x12, (910 << 5) | 0x04, (864 << 5) | 0x14, (612 << 5) | 0x12, (-869 << 5) | 0x13, (683 << 5) | 0x02, (869 << 5) | 0x12,
+	    (-869 << 5) | 0x13
+};
+
+const int16_t coeff_8k_sb_1seg_dqpsk[8] = {
+	(-835 << 5) | 0x12, (684 << 5) | 0x05, (735 << 5) | 0x14, (-835 << 5) | 0x12, (-598 << 5) | 0x10, (781 << 5) | 0x04, (739 << 5) | 0x13,
+	    (-598 << 5) | 0x10
+};
+
+const int16_t coeff_8k_sb_1seg[8] = {
+	(673 << 5) | 0x0f, (683 << 5) | 0x03, (808 << 5) | 0x12, (673 << 5) | 0x0f, (585 << 5) | 0x0f, (512 << 5) | 0x01, (780 << 5) | 0x0f,
+	    (585 << 5) | 0x0f
+};
+
+const int16_t coeff_8k_sb_3seg_0dqpsk_1dqpsk[8] = {
+	(863 << 5) | 0x17, (930 << 5) | 0x07, (878 << 5) | 0x19, (863 << 5) | 0x17, (0 << 5) | 0x14, (521 << 5) | 0x05, (980 << 5) | 0x18,
+	    (0 << 5) | 0x14
+};
+
+const int16_t coeff_8k_sb_3seg_0dqpsk[8] = {
+	(-924 << 5) | 0x17, (910 << 5) | 0x06, (774 << 5) | 0x17, (-924 << 5) | 0x17, (-877 << 5) | 0x15, (565 << 5) | 0x04, (553 << 5) | 0x15,
+	    (-877 << 5) | 0x15
+};
+
+const int16_t coeff_8k_sb_3seg_1dqpsk[8] = {
+	(-921 << 5) | 0x19, (607 << 5) | 0x06, (881 << 5) | 0x19, (-921 << 5) | 0x19, (-921 << 5) | 0x14, (713 << 5) | 0x05, (1018 << 5) | 0x18,
+	    (-921 << 5) | 0x14
+};
+
+const int16_t coeff_8k_sb_3seg[8] = {
+	(514 << 5) | 0x14, (910 << 5) | 0x05, (861 << 5) | 0x17, (514 << 5) | 0x14, (690 << 5) | 0x14, (683 << 5) | 0x03, (662 << 5) | 0x15,
+	    (690 << 5) | 0x14
+};
+
+const int16_t ana_fe_coeff_3seg[24] = {
+	81, 80, 78, 74, 68, 61, 54, 45, 37, 28, 19, 11, 4, 1022, 1017, 1013, 1010, 1008, 1008, 1008, 1008, 1010, 1014, 1017
+};
+
+const int16_t ana_fe_coeff_1seg[24] = {
+	249, 226, 164, 82, 5, 981, 970, 988, 1018, 20, 31, 26, 8, 1012, 1000, 1018, 1012, 8, 15, 14, 9, 3, 1017, 1003
+};
+
+const int16_t ana_fe_coeff_13seg[24] = {
+	396, 305, 105, -51, -77, -12, 41, 31, -11, -30, -11, 14, 15, -2, -13, -7, 5, 8, 1, -6, -7, -3, 0, 1
+};
+
+static u16 fft_to_mode(struct dib8000_state *state)
+{
+	u16 mode;
+	switch (state->fe.dtv_property_cache.transmission_mode) {
+	case TRANSMISSION_MODE_2K:
+		mode = 1;
+		break;
+	case TRANSMISSION_MODE_4K:
+		mode = 2;
+		break;
+	default:
+	case TRANSMISSION_MODE_AUTO:
+	case TRANSMISSION_MODE_8K:
+		mode = 3;
+		break;
+	}
+	return mode;
+}
+
+static void dib8000_set_acquisition_mode(struct dib8000_state *state)
+{
+	u16 nud = dib8000_read_word(state, 298);
+	nud |= (1 << 3) | (1 << 0);
+	dprintk("acquisition mode activated");
+	dib8000_write_word(state, 298, nud);
+}
+
+static int dib8000_set_output_mode(struct dib8000_state *state, int mode)
+{
+	u16 outreg, fifo_threshold, smo_mode, sram = 0x0205;	/* by default SDRAM deintlv is enabled */
+
+	outreg = 0;
+	fifo_threshold = 1792;
+	smo_mode = (dib8000_read_word(state, 299) & 0x0050) | (1 << 1);
+
+	dprintk("-I-  Setting output mode for demod %p to %d", &state->fe, mode);
+
+	switch (mode) {
+	case OUTMODE_MPEG2_PAR_GATED_CLK:	// STBs with parallel gated clock
+		outreg = (1 << 10);	/* 0x0400 */
+		break;
+	case OUTMODE_MPEG2_PAR_CONT_CLK:	// STBs with parallel continues clock
+		outreg = (1 << 10) | (1 << 6);	/* 0x0440 */
+		break;
+	case OUTMODE_MPEG2_SERIAL:	// STBs with serial input
+		outreg = (1 << 10) | (2 << 6) | (0 << 1);	/* 0x0482 */
+		break;
+	case OUTMODE_DIVERSITY:
+		if (state->cfg.hostbus_diversity) {
+			outreg = (1 << 10) | (4 << 6);	/* 0x0500 */
+			sram &= 0xfdff;
+		} else
+			sram |= 0x0c00;
+		break;
+	case OUTMODE_MPEG2_FIFO:	// e.g. USB feeding
+		smo_mode |= (3 << 1);
+		fifo_threshold = 512;
+		outreg = (1 << 10) | (5 << 6);
+		break;
+	case OUTMODE_HIGH_Z:	// disable
+		outreg = 0;
+		break;
+
+	case OUTMODE_ANALOG_ADC:
+		outreg = (1 << 10) | (3 << 6);
+		dib8000_set_acquisition_mode(state);
+		break;
+
+	default:
+		dprintk("Unhandled output_mode passed to be set for demod %p", &state->fe);
+		return -EINVAL;
+	}
+
+	if (state->cfg.output_mpeg2_in_188_bytes)
+		smo_mode |= (1 << 5);
+
+	dib8000_write_word(state, 299, smo_mode);
+	dib8000_write_word(state, 300, fifo_threshold);	/* synchronous fread */
+	dib8000_write_word(state, 1286, outreg);
+	dib8000_write_word(state, 1291, sram);
+
+	return 0;
+}
+
+static int dib8000_set_diversity_in(struct dvb_frontend *fe, int onoff)
+{
+	struct dib8000_state *state = fe->demodulator_priv;
+	u16 sync_wait = dib8000_read_word(state, 273) & 0xfff0;
+
+	if (!state->differential_constellation) {
+		dib8000_write_word(state, 272, 1 << 9);	//dvsy_off_lmod4 = 1
+		dib8000_write_word(state, 273, sync_wait | (1 << 2) | 2);	// sync_enable = 1; comb_mode = 2
+	} else {
+		dib8000_write_word(state, 272, 0);	//dvsy_off_lmod4 = 0
+		dib8000_write_word(state, 273, sync_wait);	// sync_enable = 0; comb_mode = 0
+	}
+	state->diversity_onoff = onoff;
+
+	switch (onoff) {
+	case 0:		/* only use the internal way - not the diversity input */
+		dib8000_write_word(state, 270, 1);
+		dib8000_write_word(state, 271, 0);
+		break;
+	case 1:		/* both ways */
+		dib8000_write_word(state, 270, 6);
+		dib8000_write_word(state, 271, 6);
+		break;
+	case 2:		/* only the diversity input */
+		dib8000_write_word(state, 270, 0);
+		dib8000_write_word(state, 271, 1);
+		break;
+	}
+	return 0;
+}
+
+static void dib8000_set_power_mode(struct dib8000_state *state, enum dib8000_power_mode mode)
+{
+	/* by default everything is going to be powered off */
+	u16 reg_774 = 0x3fff, reg_775 = 0xffff, reg_776 = 0xffff,
+	    reg_900 = (dib8000_read_word(state, 900) & 0xfffc) | 0x3, reg_1280 = (dib8000_read_word(state, 1280) & 0x00ff) | 0xff00;
+
+	/* now, depending on the requested mode, we power on */
+	switch (mode) {
+		/* power up everything in the demod */
+	case DIB8000M_POWER_ALL:
+		reg_774 = 0x0000;
+		reg_775 = 0x0000;
+		reg_776 = 0x0000;
+		reg_900 &= 0xfffc;
+		reg_1280 &= 0x00ff;
+		break;
+	case DIB8000M_POWER_INTERFACE_ONLY:
+		reg_1280 &= 0x00ff;
+		break;
+	}
+
+	dprintk("powermode : 774 : %x ; 775 : %x; 776 : %x ; 900 : %x; 1280 : %x", reg_774, reg_775, reg_776, reg_900, reg_1280);
+	dib8000_write_word(state, 774, reg_774);
+	dib8000_write_word(state, 775, reg_775);
+	dib8000_write_word(state, 776, reg_776);
+	dib8000_write_word(state, 900, reg_900);
+	dib8000_write_word(state, 1280, reg_1280);
+}
+
+static int dib8000_set_adc_state(struct dib8000_state *state, enum dibx000_adc_states no)
+{
+	int ret = 0;
+	u16 reg_907 = dib8000_read_word(state, 907), reg_908 = dib8000_read_word(state, 908);
+
+	switch (no) {
+	case DIBX000_SLOW_ADC_ON:
+		reg_908 |= (1 << 1) | (1 << 0);
+		ret |= dib8000_write_word(state, 908, reg_908);
+		reg_908 &= ~(1 << 1);
+		break;
+
+	case DIBX000_SLOW_ADC_OFF:
+		reg_908 |= (1 << 1) | (1 << 0);
+		break;
+
+	case DIBX000_ADC_ON:
+		reg_907 &= 0x0fff;
+		reg_908 &= 0x0003;
+		break;
+
+	case DIBX000_ADC_OFF:	// leave the VBG voltage on
+		reg_907 |= (1 << 14) | (1 << 13) | (1 << 12);
+		reg_908 |= (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2);
+		break;
+
+	case DIBX000_VBG_ENABLE:
+		reg_907 &= ~(1 << 15);
+		break;
+
+	case DIBX000_VBG_DISABLE:
+		reg_907 |= (1 << 15);
+		break;
+
+	default:
+		break;
+	}
+
+	ret |= dib8000_write_word(state, 907, reg_907);
+	ret |= dib8000_write_word(state, 908, reg_908);
+
+	return ret;
+}
+
+static int dib8000_set_bandwidth(struct dib8000_state *state, u32 bw)
+{
+	u32 timf;
+
+	if (bw == 0)
+		bw = 6000;
+
+	if (state->timf == 0) {
+		dprintk("using default timf");
+		timf = state->timf_default;
+	} else {
+		dprintk("using updated timf");
+		timf = state->timf;
+	}
+
+	dib8000_write_word(state, 29, (u16) ((timf >> 16) & 0xffff));
+	dib8000_write_word(state, 30, (u16) ((timf) & 0xffff));
+
+	return 0;
+}
+
+static int dib8000_sad_calib(struct dib8000_state *state)
+{
+/* internal */
+	dib8000_write_word(state, 923, (0 << 1) | (0 << 0));
+	dib8000_write_word(state, 924, 776);	// 0.625*3.3 / 4096
+
+	/* do the calibration */
+	dib8000_write_word(state, 923, (1 << 0));
+	dib8000_write_word(state, 923, (0 << 0));
+
+	msleep(1);
+	return 0;
+}
+
+int dib8000_set_wbd_ref(struct dvb_frontend *fe, u16 value)
+{
+	struct dib8000_state *state = fe->demodulator_priv;
+	if (value > 4095)
+		value = 4095;
+	state->wbd_ref = value;
+	return dib8000_write_word(state, 106, value);
+}
+
+EXPORT_SYMBOL(dib8000_set_wbd_ref);
+static void dib8000_reset_pll_common(struct dib8000_state *state, const struct dibx000_bandwidth_config *bw)
+{
+	dprintk("ifreq: %d %x, inversion: %d", bw->ifreq, bw->ifreq, bw->ifreq >> 25);
+	dib8000_write_word(state, 23, (u16) (((bw->internal * 1000) >> 16) & 0xffff));	/* P_sec_len */
+	dib8000_write_word(state, 24, (u16) ((bw->internal * 1000) & 0xffff));
+	dib8000_write_word(state, 27, (u16) ((bw->ifreq >> 16) & 0x01ff));
+	dib8000_write_word(state, 28, (u16) (bw->ifreq & 0xffff));
+	dib8000_write_word(state, 26, (u16) ((bw->ifreq >> 25) & 0x0003));
+
+	dib8000_write_word(state, 922, bw->sad_cfg);
+}
+
+static void dib8000_reset_pll(struct dib8000_state *state)
+{
+	const struct dibx000_bandwidth_config *pll = state->cfg.pll;
+	u16 clk_cfg1;
+
+	// clk_cfg0
+	dib8000_write_word(state, 901, (pll->pll_prediv << 8) | (pll->pll_ratio << 0));
+
+	// clk_cfg1
+	clk_cfg1 = (1 << 10) | (0 << 9) | (pll->IO_CLK_en_core << 8) |
+	    (pll->bypclk_div << 5) | (pll->enable_refdiv << 4) | (1 << 3) | (pll->pll_range << 1) | (pll->pll_reset << 0);
+
+	dib8000_write_word(state, 902, clk_cfg1);
+	clk_cfg1 = (clk_cfg1 & 0xfff7) | (pll->pll_bypass << 3);
+	dib8000_write_word(state, 902, clk_cfg1);
+
+	dprintk("clk_cfg1: 0x%04x", clk_cfg1);	/* 0x507 1 0 1 000 0 0 11 1 */
+
+	/* smpl_cfg: P_refclksel=2, P_ensmplsel=1 nodivsmpl=1 */
+	if (state->cfg.pll->ADClkSrc == 0)
+		dib8000_write_word(state, 904, (0 << 15) | (0 << 12) | (0 << 10) | (pll->modulo << 8) | (pll->ADClkSrc << 7) | (0 << 1));
+	else if (state->cfg.refclksel != 0)
+		dib8000_write_word(state, 904,
+				   (0 << 15) | (1 << 12) | ((state->cfg.refclksel & 0x3) << 10) | (pll->modulo << 8) | (pll->
+															ADClkSrc << 7) | (0 << 1));
+	else
+		dib8000_write_word(state, 904, (0 << 15) | (1 << 12) | (3 << 10) | (pll->modulo << 8) | (pll->ADClkSrc << 7) | (0 << 1));
+
+	dib8000_reset_pll_common(state, pll);
+}
+
+static int dib8000_reset_gpio(struct dib8000_state *st)
+{
+	/* reset the GPIOs */
+	dib8000_write_word(st, 1029, st->cfg.gpio_dir);
+	dib8000_write_word(st, 1030, st->cfg.gpio_val);
+
+	/* TODO 782 is P_gpio_od */
+
+	dib8000_write_word(st, 1032, st->cfg.gpio_pwm_pos);
+
+	dib8000_write_word(st, 1037, st->cfg.pwm_freq_div);
+	return 0;
+}
+
+static int dib8000_cfg_gpio(struct dib8000_state *st, u8 num, u8 dir, u8 val)
+{
+	st->cfg.gpio_dir = dib8000_read_word(st, 1029);
+	st->cfg.gpio_dir &= ~(1 << num);	/* reset the direction bit */
+	st->cfg.gpio_dir |= (dir & 0x1) << num;	/* set the new direction */
+	dib8000_write_word(st, 1029, st->cfg.gpio_dir);
+
+	st->cfg.gpio_val = dib8000_read_word(st, 1030);
+	st->cfg.gpio_val &= ~(1 << num);	/* reset the direction bit */
+	st->cfg.gpio_val |= (val & 0x01) << num;	/* set the new value */
+	dib8000_write_word(st, 1030, st->cfg.gpio_val);
+
+	dprintk("gpio dir: %x: gpio val: %x", st->cfg.gpio_dir, st->cfg.gpio_val);
+
+	return 0;
+}
+
+int dib8000_set_gpio(struct dvb_frontend *fe, u8 num, u8 dir, u8 val)
+{
+	struct dib8000_state *state = fe->demodulator_priv;
+	return dib8000_cfg_gpio(state, num, dir, val);
+}
+
+EXPORT_SYMBOL(dib8000_set_gpio);
+static const u16 dib8000_defaults[] = {
+	/* auto search configuration - lock0 by default waiting
+	 * for cpil_lock; lock1 cpil_lock; lock2 tmcc_sync_lock */
+	3, 7,
+	0x0004,
+	0x0400,
+	0x0814,
+
+	12, 11,
+	0x001b,
+	0x7740,
+	0x005b,
+	0x8d80,
+	0x01c9,
+	0xc380,
+	0x0000,
+	0x0080,
+	0x0000,
+	0x0090,
+	0x0001,
+	0xd4c0,
+
+	/*1, 32,
+	   0x6680 // P_corm_thres Lock algorithms configuration */
+
+	11, 80,			/* set ADC level to -16 */
+	(1 << 13) - 825 - 117,
+	(1 << 13) - 837 - 117,
+	(1 << 13) - 811 - 117,
+	(1 << 13) - 766 - 117,
+	(1 << 13) - 737 - 117,
+	(1 << 13) - 693 - 117,
+	(1 << 13) - 648 - 117,
+	(1 << 13) - 619 - 117,
+	(1 << 13) - 575 - 117,
+	(1 << 13) - 531 - 117,
+	(1 << 13) - 501 - 117,
+
+	4, 108,
+	0,
+	0,
+	0,
+	0,
+
+	1, 175,
+	0x0410,
+	1, 179,
+	8192,			// P_fft_nb_to_cut
+
+	6, 181,
+	0x2800,			// P_coff_corthres_ ( 2k 4k 8k ) 0x2800
+	0x2800,
+	0x2800,
+	0x2800,			// P_coff_cpilthres_ ( 2k 4k 8k ) 0x2800
+	0x2800,
+	0x2800,
+
+	2, 193,
+	0x0666,			// P_pha3_thres
+	0x0000,			// P_cti_use_cpe, P_cti_use_prog
+
+	2, 205,
+	0x200f,			// P_cspu_regul, P_cspu_win_cut
+	0x000f,			// P_des_shift_work
+
+	5, 215,
+	0x023d,			// P_adp_regul_cnt
+	0x00a4,			// P_adp_noise_cnt
+	0x00a4,			// P_adp_regul_ext
+	0x7ff0,			// P_adp_noise_ext
+	0x3ccc,			// P_adp_fil
+
+	1, 230,
+	0x0000,			// P_2d_byp_ti_num
+
+	1, 263,
+	0x800,			//P_equal_thres_wgn
+
+	1, 268,
+	(2 << 9) | 39,		// P_equal_ctrl_synchro, P_equal_speedmode
+
+	1, 270,
+	0x0001,			// P_div_lock0_wait
+	1, 285,
+	0x0020,			//p_fec_
+	1, 299,
+	0x0062,			// P_smo_mode, P_smo_rs_discard, P_smo_fifo_flush, P_smo_pid_parse, P_smo_error_discard
+
+	1, 338,
+	(1 << 12) |		// P_ctrl_corm_thres4pre_freq_inh=1
+	    (1 << 10) |		// P_ctrl_pre_freq_mode_sat=1
+	    (0 << 9) |		// P_ctrl_pre_freq_inh=0
+	    (3 << 5) |		// P_ctrl_pre_freq_step=3
+	    (1 << 0),		// P_pre_freq_win_len=1
+
+	1, 903,
+	(0 << 4) | 2,		// P_divclksel=0 P_divbitsel=2 (was clk=3,bit=1 for MPW)
+
+	0,
+};
+
+static u16 dib8000_identify(struct i2c_device *client)
+{
+	u16 value;
+
+	//because of glitches sometimes
+	value = dib8000_i2c_read16(client, 896);
+
+	if ((value = dib8000_i2c_read16(client, 896)) != 0x01b3) {
+		dprintk("wrong Vendor ID (read=0x%x)", value);
+		return 0;
+	}
+
+	value = dib8000_i2c_read16(client, 897);
+	if (value != 0x8000 && value != 0x8001 && value != 0x8002) {
+		dprintk("wrong Device ID (%x)", value);
+		return 0;
+	}
+
+	switch (value) {
+	case 0x8000:
+		dprintk("found DiB8000A");
+		break;
+	case 0x8001:
+		dprintk("found DiB8000B");
+		break;
+	case 0x8002:
+		dprintk("found DiB8000C");
+		break;
+	}
+	return value;
+}
+
+static int dib8000_reset(struct dvb_frontend *fe)
+{
+	struct dib8000_state *state = fe->demodulator_priv;
+
+	dib8000_write_word(state, 1287, 0x0003);	/* sram lead in, rdy */
+
+	if ((state->revision = dib8000_identify(&state->i2c)) == 0)
+		return -EINVAL;
+
+	if (state->revision == 0x8000)
+		dprintk("error : dib8000 MA not supported");
+
+	dibx000_reset_i2c_master(&state->i2c_master);
+
+	dib8000_set_power_mode(state, DIB8000M_POWER_ALL);
+
+	/* always leave the VBG voltage on - it consumes almost nothing but takes a long time to start */
+	dib8000_set_adc_state(state, DIBX000_VBG_ENABLE);
+
+	/* restart all parts */
+	dib8000_write_word(state, 770, 0xffff);
+	dib8000_write_word(state, 771, 0xffff);
+	dib8000_write_word(state, 772, 0xfffc);
+	dib8000_write_word(state, 898, 0x000c);	// sad
+	dib8000_write_word(state, 1280, 0x004d);
+	dib8000_write_word(state, 1281, 0x000c);
+
+	dib8000_write_word(state, 770, 0x0000);
+	dib8000_write_word(state, 771, 0x0000);
+	dib8000_write_word(state, 772, 0x0000);
+	dib8000_write_word(state, 898, 0x0004);	// sad
+	dib8000_write_word(state, 1280, 0x0000);
+	dib8000_write_word(state, 1281, 0x0000);
+
+	/* drives */
+	if (state->cfg.drives)
+		dib8000_write_word(state, 906, state->cfg.drives);
+	else {
+		dprintk("using standard PAD-drive-settings, please adjust settings in config-struct to be optimal.");
+		dib8000_write_word(state, 906, 0x2d98);	// min drive SDRAM - not optimal - adjust
+	}
+
+	dib8000_reset_pll(state);
+
+	if (dib8000_reset_gpio(state) != 0)
+		dprintk("GPIO reset was not successful.");
+
+	if (dib8000_set_output_mode(state, OUTMODE_HIGH_Z) != 0)
+		dprintk("OUTPUT_MODE could not be resetted.");
+
+	state->current_agc = NULL;
+
+	// P_iqc_alpha_pha, P_iqc_alpha_amp, P_iqc_dcc_alpha, ...
+	/* P_iqc_ca2 = 0; P_iqc_impnc_on = 0; P_iqc_mode = 0; */
+	if (state->cfg.pll->ifreq == 0)
+		dib8000_write_word(state, 40, 0x0755);	/* P_iqc_corr_inh = 0 enable IQcorr block */
+	else
+		dib8000_write_word(state, 40, 0x1f55);	/* P_iqc_corr_inh = 1 disable IQcorr block */
+
+	{
+		u16 l = 0, r;
+		const u16 *n;
+		n = dib8000_defaults;
+		l = *n++;
+		while (l) {
+			r = *n++;
+			do {
+				dib8000_write_word(state, r, *n++);
+				r++;
+			} while (--l);
+			l = *n++;
+		}
+	}
+	state->isdbt_cfg_loaded = 0;
+
+	//div_cfg override for special configs
+	if (state->cfg.div_cfg != 0)
+		dib8000_write_word(state, 903, state->cfg.div_cfg);
+
+	/* unforce divstr regardless whether i2c enumeration was done or not */
+	dib8000_write_word(state, 1285, dib8000_read_word(state, 1285) & ~(1 << 1));
+
+	dib8000_set_bandwidth(state, 6000);
+
+	dib8000_set_adc_state(state, DIBX000_SLOW_ADC_ON);
+	dib8000_sad_calib(state);
+	dib8000_set_adc_state(state, DIBX000_SLOW_ADC_OFF);
+
+	dib8000_set_power_mode(state, DIB8000M_POWER_INTERFACE_ONLY);
+
+	return 0;
+}
+
+static void dib8000_restart_agc(struct dib8000_state *state)
+{
+	// P_restart_iqc & P_restart_agc
+	dib8000_write_word(state, 770, 0x0a00);
+	dib8000_write_word(state, 770, 0x0000);
+}
+
+static int dib8000_update_lna(struct dib8000_state *state)
+{
+	u16 dyn_gain;
+
+	if (state->cfg.update_lna) {
+		// read dyn_gain here (because it is demod-dependent and not tuner)
+		dyn_gain = dib8000_read_word(state, 390);
+
+		if (state->cfg.update_lna(&state->fe, dyn_gain)) {	// LNA has changed
+			dib8000_restart_agc(state);
+			return 1;
+		}
+	}
+	return 0;
+}
+
+static int dib8000_set_agc_config(struct dib8000_state *state, u8 band)
+{
+	struct dibx000_agc_config *agc = NULL;
+	int i;
+	if (state->current_band == band && state->current_agc != NULL)
+		return 0;
+	state->current_band = band;
+
+	for (i = 0; i < state->cfg.agc_config_count; i++)
+		if (state->cfg.agc[i].band_caps & band) {
+			agc = &state->cfg.agc[i];
+			break;
+		}
+
+	if (agc == NULL) {
+		dprintk("no valid AGC configuration found for band 0x%02x", band);
+		return -EINVAL;
+	}
+
+	state->current_agc = agc;
+
+	/* AGC */
+	dib8000_write_word(state, 76, agc->setup);
+	dib8000_write_word(state, 77, agc->inv_gain);
+	dib8000_write_word(state, 78, agc->time_stabiliz);
+	dib8000_write_word(state, 101, (agc->alpha_level << 12) | agc->thlock);
+
+	// Demod AGC loop configuration
+	dib8000_write_word(state, 102, (agc->alpha_mant << 5) | agc->alpha_exp);
+	dib8000_write_word(state, 103, (agc->beta_mant << 6) | agc->beta_exp);
+
+	dprintk("WBD: ref: %d, sel: %d, active: %d, alpha: %d",
+		state->wbd_ref != 0 ? state->wbd_ref : agc->wbd_ref, agc->wbd_sel, !agc->perform_agc_softsplit, agc->wbd_sel);
+
+	/* AGC continued */
+	if (state->wbd_ref != 0)
+		dib8000_write_word(state, 106, state->wbd_ref);
+	else			// use default
+		dib8000_write_word(state, 106, agc->wbd_ref);
+	dib8000_write_word(state, 107, (agc->wbd_alpha << 9) | (agc->perform_agc_softsplit << 8));
+	dib8000_write_word(state, 108, agc->agc1_max);
+	dib8000_write_word(state, 109, agc->agc1_min);
+	dib8000_write_word(state, 110, agc->agc2_max);
+	dib8000_write_word(state, 111, agc->agc2_min);
+	dib8000_write_word(state, 112, (agc->agc1_pt1 << 8) | agc->agc1_pt2);
+	dib8000_write_word(state, 113, (agc->agc1_slope1 << 8) | agc->agc1_slope2);
+	dib8000_write_word(state, 114, (agc->agc2_pt1 << 8) | agc->agc2_pt2);
+	dib8000_write_word(state, 115, (agc->agc2_slope1 << 8) | agc->agc2_slope2);
+
+	dib8000_write_word(state, 75, agc->agc1_pt3);
+	dib8000_write_word(state, 923, (dib8000_read_word(state, 923) & 0xffe3) | (agc->wbd_inv << 4) | (agc->wbd_sel << 2));	/*LB : 929 -> 923 */
+
+	return 0;
+}
+
+static int dib8000_agc_soft_split(struct dib8000_state *state)
+{
+	u16 agc, split_offset;
+
+	if (!state->current_agc || !state->current_agc->perform_agc_softsplit || state->current_agc->split.max == 0)
+		return FE_CALLBACK_TIME_NEVER;
+
+	// n_agc_global
+	agc = dib8000_read_word(state, 390);
+
+	if (agc > state->current_agc->split.min_thres)
+		split_offset = state->current_agc->split.min;
+	else if (agc < state->current_agc->split.max_thres)
+		split_offset = state->current_agc->split.max;
+	else
+		split_offset = state->current_agc->split.max *
+		    (agc - state->current_agc->split.min_thres) / (state->current_agc->split.max_thres - state->current_agc->split.min_thres);
+
+	dprintk("AGC split_offset: %d", split_offset);
+
+	// P_agc_force_split and P_agc_split_offset
+	dib8000_write_word(state, 107, (dib8000_read_word(state, 107) & 0xff00) | split_offset);
+	return 5000;
+}
+
+static int dib8000_agc_startup(struct dvb_frontend *fe)
+{
+	struct dib8000_state *state = fe->demodulator_priv;
+	enum frontend_tune_state *tune_state = &state->tune_state;
+
+	int ret = 0;
+
+	switch (*tune_state) {
+	case CT_AGC_START:
+		// set power-up level: interf+analog+AGC
+
+		dib8000_set_adc_state(state, DIBX000_ADC_ON);
+
+		if (dib8000_set_agc_config(state, (unsigned char)(BAND_OF_FREQUENCY(fe->dtv_property_cache.frequency / 1000))) != 0) {
+			*tune_state = CT_AGC_STOP;
+			state->status = FE_STATUS_TUNE_FAILED;
+			break;
+		}
+
+		ret = 70;
+		*tune_state = CT_AGC_STEP_0;
+		break;
+
+	case CT_AGC_STEP_0:
+		//AGC initialization
+		if (state->cfg.agc_control)
+			state->cfg.agc_control(&state->fe, 1);
+
+		dib8000_restart_agc(state);
+
+		// wait AGC rough lock time
+		ret = 50;
+		*tune_state = CT_AGC_STEP_1;
+		break;
+
+	case CT_AGC_STEP_1:
+		// wait AGC accurate lock time
+		ret = 70;
+
+		if (dib8000_update_lna(state))
+			// wait only AGC rough lock time
+			ret = 50;
+		else
+			*tune_state = CT_AGC_STEP_2;
+		break;
+
+	case CT_AGC_STEP_2:
+		dib8000_agc_soft_split(state);
+
+		if (state->cfg.agc_control)
+			state->cfg.agc_control(&state->fe, 0);
+
+		*tune_state = CT_AGC_STOP;
+		break;
+	default:
+		ret = dib8000_agc_soft_split(state);
+		break;
+	}
+	return ret;
+
+}
+
+static void dib8000_update_timf(struct dib8000_state *state)
+{
+	u32 timf = state->timf = dib8000_read32(state, 435);
+
+	dib8000_write_word(state, 29, (u16) (timf >> 16));
+	dib8000_write_word(state, 30, (u16) (timf & 0xffff));
+	dprintk("Updated timing frequency: %d (default: %d)", state->timf, state->timf_default);
+}
+
+static void dib8000_set_channel(struct dib8000_state *state, u8 seq, u8 autosearching)
+{
+	u16 mode, max_constellation, seg_diff_mask = 0, nbseg_diff = 0;
+	u8 guard, crate, constellation, timeI;
+	u8 permu_seg[] = { 6, 5, 7, 4, 8, 3, 9, 2, 10, 1, 11, 0, 12 };
+	u16 i, coeff[4], P_cfr_left_edge = 0, P_cfr_right_edge = 0, seg_mask13 = 0x1fff;	// All 13 segments enabled
+	const s16 *ncoeff, *ana_fe;
+	u16 tmcc_pow = 0;
+	u16 coff_pow = 0x2800;
+	u16 init_prbs = 0xfff;
+	u16 ana_gain = 0;
+	u16 adc_target_16dB[11] = {
+		(1 << 13) - 825 - 117,
+		(1 << 13) - 837 - 117,
+		(1 << 13) - 811 - 117,
+		(1 << 13) - 766 - 117,
+		(1 << 13) - 737 - 117,
+		(1 << 13) - 693 - 117,
+		(1 << 13) - 648 - 117,
+		(1 << 13) - 619 - 117,