V4L/DVB (13374): AltoBeam ATBM8830 GB20600-2006(DMB-TH) demodulator (ec27b6aa) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/media/dvb/frontends/Kconfig

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Original line number	Diff line number	Diff line
		@@ -564,6 +564,13 @@ config DVB_LGS8GXX
		help
		A DMB-TH tuner module. Say Y when you want to support this frontend.

		config DVB_ATBM8830
		tristate "AltoBeam ATBM8830/8831 DMB-TH demodulator"
		depends on DVB_CORE && I2C
		default m if DVB_FE_CUSTOMISE
		help
		A DMB-TH tuner module. Say Y when you want to support this frontend.

		comment "Tools to develop new frontends"

		config DVB_DUMMY_FE

drivers/media/dvb/frontends/Makefile

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Original line number	Diff line number	Diff line
		@@ -64,6 +64,7 @@ obj-$(CONFIG_DVB_TUNER_CX24113) += cx24113.o
		obj-$(CONFIG_DVB_S5H1411) += s5h1411.o
		obj-$(CONFIG_DVB_LGS8GL5) += lgs8gl5.o
		obj-$(CONFIG_DVB_LGS8GXX) += lgs8gxx.o
		obj-$(CONFIG_DVB_ATBM8830) += atbm8830.o
		obj-$(CONFIG_DVB_DUMMY_FE) += dvb_dummy_fe.o
		obj-$(CONFIG_DVB_AF9013) += af9013.o
		obj-$(CONFIG_DVB_CX24116) += cx24116.o

drivers/media/dvb/frontends/atbm8830.c

0 → 100644

+495 −0

Original line number	Diff line number	Diff line
		/*
		* Support for AltoBeam GB20600 (a.k.a DMB-TH) demodulator
		* ATBM8830, ATBM8831
		*
		* Copyright (C) 2009 David T.L. Wong <davidtlwong@gmail.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.
		*
		* 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 "dvb_frontend.h"

		#include "atbm8830.h"
		#include "atbm8830_priv.h"

		#define dprintk(args...) \
		do { \
		if (debug) \
		printk(KERN_DEBUG "atbm8830: " args); \
		} while (0)

		static int debug;

		module_param(debug, int, 0644);
		MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

		static int atbm8830_write_reg(struct atbm_state *priv, u16 reg, u8 data)
		{
		int ret = 0;
		u8 dev_addr;
		u8 buf1[] = { reg >> 8, reg & 0xFF };
		u8 buf2[] = { data };
		struct i2c_msg msg1 = { .flags = 0, .buf = buf1, .len = 2 };
		struct i2c_msg msg2 = { .flags = 0, .buf = buf2, .len = 1 };

		dev_addr = priv->config->demod_address;
		msg1.addr = dev_addr;
		msg2.addr = dev_addr;

		if (debug >= 2)
		printk(KERN_DEBUG "%s: reg=0x%04X, data=0x%02X\n",
		__func__, reg, data);

		ret = i2c_transfer(priv->i2c, &msg1, 1);
		if (ret != 1)
		return -EIO;

		ret = i2c_transfer(priv->i2c, &msg2, 1);
		return (ret != 1) ? -EIO : 0;
		}

		static int atbm8830_read_reg(struct atbm_state priv, u16 reg, u8 p_data)
		{
		int ret;
		u8 dev_addr;

		u8 buf1[] = { reg >> 8, reg & 0xFF };
		u8 buf2[] = { 0 };
		struct i2c_msg msg1 = { .flags = 0, .buf = buf1, .len = 2 };
		struct i2c_msg msg2 = { .flags = I2C_M_RD, .buf = buf2, .len = 1 };

		dev_addr = priv->config->demod_address;
		msg1.addr = dev_addr;
		msg2.addr = dev_addr;

		ret = i2c_transfer(priv->i2c, &msg1, 1);
		if (ret != 1) {
		dprintk(KERN_DEBUG "%s: error reg=0x%04x, ret=%i\n",
		__func__, reg, ret);
		return -EIO;
		}

		ret = i2c_transfer(priv->i2c, &msg2, 1);
		if (ret != 1)
		return -EIO;

		*p_data = buf2[0];
		if (debug >= 2)
		printk(KERN_DEBUG "%s: reg=0x%04X, data=0x%02X\n",
		__func__, reg, buf2[0]);

		return 0;
		}

		/* Lock register latch so that multi-register read is atomic */
		static inline int atbm8830_reglatch_lock(struct atbm_state *priv, int lock)
		{
		return atbm8830_write_reg(priv, REG_READ_LATCH, lock ? 1 : 0);
		}

		static int set_osc_freq(struct atbm_state priv, u32 freq /in kHz*/)
		{
		u32 val;

		val = (u64)0x100000 * freq / 30400;

		atbm8830_write_reg(priv, REG_OSC_CLK, val);
		atbm8830_write_reg(priv, REG_OSC_CLK + 1, val >> 8);
		atbm8830_write_reg(priv, REG_OSC_CLK + 2, val >> 16);

		return 0;
		}

		static int set_if_freq(struct atbm_state priv, u32 freq /in kHz*/)
		{

		u32 fs = priv->config->osc_clk_freq;
		double t;
		u32 val;
		u8 dat;

		t = 2 * 3.141593 * (freq - fs) / fs * (1 << 22);
		val = t;

		if (freq != 0) {
		atbm8830_write_reg(priv, REG_TUNER_BASEBAND, 1);
		atbm8830_write_reg(priv, REG_IF_FREQ, val);
		atbm8830_write_reg(priv, REG_IF_FREQ+1, val >> 8);
		atbm8830_write_reg(priv, REG_IF_FREQ+2, val >> 16);

		atbm8830_read_reg(priv, REG_ADC_CONFIG, &dat);
		dat &= 0xFC;
		atbm8830_write_reg(priv, REG_ADC_CONFIG, dat);
		} else {
		/* Zero IF */
		atbm8830_write_reg(priv, REG_TUNER_BASEBAND, 0);

		atbm8830_read_reg(priv, REG_ADC_CONFIG, &dat);
		dat &= 0xFC;
		dat \|= 0x02;
		atbm8830_write_reg(priv, REG_ADC_CONFIG, dat);

		if (priv->config->zif_swap_iq)
		atbm8830_write_reg(priv, REG_SWAP_I_Q, 0x03);
		else
		atbm8830_write_reg(priv, REG_SWAP_I_Q, 0x01);
		}

		return 0;
		}

		static int is_locked(struct atbm_state priv, u8 locked)
		{
		u8 status;

		atbm8830_read_reg(priv, REG_LOCK_STATUS, &status);

		if (locked != NULL)
		*locked = (status == 1);
		return 0;
		}

		static int set_agc_config(struct atbm_state *priv,
		u8 min, u8 max, u8 hold_loop)
		{
		atbm8830_write_reg(priv, REG_AGC_MIN, min);
		atbm8830_write_reg(priv, REG_AGC_MAX, max);
		atbm8830_write_reg(priv, REG_AGC_HOLD_LOOP, hold_loop);

		return 0;
		}

		static int set_static_channel_mode(struct atbm_state *priv)
		{
		int i;

		for (i = 0; i < 5; i++)
		atbm8830_write_reg(priv, 0x099B + i, 0x08);

		atbm8830_write_reg(priv, 0x095B, 0x7F);
		atbm8830_write_reg(priv, 0x09CB, 0x01);
		atbm8830_write_reg(priv, 0x09CC, 0x7F);
		atbm8830_write_reg(priv, 0x09CD, 0x7F);
		atbm8830_write_reg(priv, 0x0E01, 0x20);

		/* For single carrier */
		atbm8830_write_reg(priv, 0x0B03, 0x0A);
		atbm8830_write_reg(priv, 0x0935, 0x10);
		atbm8830_write_reg(priv, 0x0936, 0x08);
		atbm8830_write_reg(priv, 0x093E, 0x08);
		atbm8830_write_reg(priv, 0x096E, 0x06);

		/* frame_count_max0 */
		atbm8830_write_reg(priv, 0x0B09, 0x00);
		/* frame_count_max1 */
		atbm8830_write_reg(priv, 0x0B0A, 0x08);

		return 0;
		}

		static int set_ts_config(struct atbm_state *priv)
		{
		const struct atbm8830_config *cfg = priv->config;

		/Set parallel/serial ts mode/
		atbm8830_write_reg(priv, REG_TS_SERIAL, cfg->serial_ts ? 1 : 0);
		atbm8830_write_reg(priv, REG_TS_CLK_MODE, cfg->serial_ts ? 1 : 0);
		/Set ts sampling edge/
		atbm8830_write_reg(priv, REG_TS_SAMPLE_EDGE,
		cfg->ts_sampling_edge ? 1 : 0);
		/Set ts clock freerun/
		atbm8830_write_reg(priv, REG_TS_CLK_FREERUN,
		cfg->ts_clk_gated ? 0 : 1);

		return 0;
		}

		static int atbm8830_init(struct dvb_frontend *fe)
		{
		struct atbm_state *priv = fe->demodulator_priv;
		const struct atbm8830_config *cfg = priv->config;

		/Set oscillator frequency/
		set_osc_freq(priv, cfg->osc_clk_freq);

		/Set IF frequency/
		set_if_freq(priv, cfg->if_freq);


		/Set static channel mode/
		set_static_channel_mode(priv);

		set_ts_config(priv);
		/Turn off DSP reset/
		atbm8830_write_reg(priv, 0x000A, 0);

		/SW version test/
		atbm8830_write_reg(priv, 0x020C, 11);

		/* Run */
		atbm8830_write_reg(priv, REG_DEMOD_RUN, 1);

		return 0;
		}


		static void atbm8830_release(struct dvb_frontend *fe)
		{
		struct atbm_state *state = fe->demodulator_priv;
		dprintk("%s\n", __func__);

		kfree(state);
		}

		static int atbm8830_set_fe(struct dvb_frontend *fe,
		struct dvb_frontend_parameters *fe_params)
		{
		struct atbm_state *priv = fe->demodulator_priv;
		int i;
		u8 locked = 0;
		dprintk("%s\n", __func__);

		/* set frequency */
		if (fe->ops.tuner_ops.set_params) {
		if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
		fe->ops.tuner_ops.set_params(fe, fe_params);
		if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);
		}

		/* start auto lock */
		for (i = 0; i < 10; i++) {
		mdelay(100);
		dprintk("Try %d\n", i);
		is_locked(priv, &locked);
		if (locked != 0) {
		dprintk("ATBM8830 locked!\n");
		break;
		}
		}

		return 0;
		}

		static int atbm8830_get_fe(struct dvb_frontend *fe,
		struct dvb_frontend_parameters *fe_params)
		{
		dprintk("%s\n", __func__);

		/* TODO: get real readings from device */
		/* inversion status */
		fe_params->inversion = INVERSION_OFF;

		/* bandwidth */
		fe_params->u.ofdm.bandwidth = BANDWIDTH_8_MHZ;

		fe_params->u.ofdm.code_rate_HP = FEC_AUTO;
		fe_params->u.ofdm.code_rate_LP = FEC_AUTO;

		fe_params->u.ofdm.constellation = QAM_AUTO;

		/* transmission mode */
		fe_params->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;

		/* guard interval */
		fe_params->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;

		/* hierarchy */
		fe_params->u.ofdm.hierarchy_information = HIERARCHY_NONE;

		return 0;
		}

		static int atbm8830_get_tune_settings(struct dvb_frontend *fe,
		struct dvb_frontend_tune_settings *fesettings)
		{
		fesettings->min_delay_ms = 0;
		fesettings->step_size = 0;
		fesettings->max_drift = 0;
		return 0;
		}

		static int atbm8830_read_status(struct dvb_frontend fe, fe_status_t fe_status)
		{
		struct atbm_state *priv = fe->demodulator_priv;
		u8 locked = 0;
		u8 agc_locked = 0;

		dprintk("%s\n", __func__);
		*fe_status = 0;

		is_locked(priv, &locked);
		if (locked) {
		*fe_status \|= FE_HAS_SIGNAL \| FE_HAS_CARRIER \|
		FE_HAS_VITERBI \| FE_HAS_SYNC \| FE_HAS_LOCK;
		}
		dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);

		atbm8830_read_reg(priv, REG_AGC_LOCK, &agc_locked);
		dprintk("AGC Lock: %d\n", agc_locked);

		return 0;
		}

		static int atbm8830_read_ber(struct dvb_frontend fe, u32 ber)
		{
		struct atbm_state *priv = fe->demodulator_priv;
		u32 frame_err;
		u8 t;

		dprintk("%s\n", __func__);

		atbm8830_reglatch_lock(priv, 1);

		atbm8830_read_reg(priv, REG_FRAME_ERR_CNT + 1, &t);
		frame_err = t & 0x7F;
		frame_err <<= 8;
		atbm8830_read_reg(priv, REG_FRAME_ERR_CNT, &t);
		frame_err \|= t;

		atbm8830_reglatch_lock(priv, 0);

		ber = frame_err 100 / 32767;

		dprintk("%s: ber=0x%x\n", __func__, *ber);
		return 0;
		}

		static int atbm8830_read_signal_strength(struct dvb_frontend fe, u16 signal)
		{
		struct atbm_state *priv = fe->demodulator_priv;
		u32 pwm;
		u8 t;

		dprintk("%s\n", __func__);
		atbm8830_reglatch_lock(priv, 1);

		atbm8830_read_reg(priv, REG_AGC_PWM_VAL + 1, &t);
		pwm = t & 0x03;
		pwm <<= 8;
		atbm8830_read_reg(priv, REG_AGC_PWM_VAL, &t);
		pwm \|= t;

		atbm8830_reglatch_lock(priv, 0);

		dprintk("AGC PWM = 0x%02X\n", pwm);
		pwm = 0x400 - pwm;

		signal = pwm 0x10000 / 0x400;

		return 0;
		}

		static int atbm8830_read_snr(struct dvb_frontend fe, u16 snr)
		{
		dprintk("%s\n", __func__);
		*snr = 0;
		return 0;
		}

		static int atbm8830_read_ucblocks(struct dvb_frontend fe, u32 ucblocks)
		{
		dprintk("%s\n", __func__);
		*ucblocks = 0;
		return 0;
		}

		static int atbm8830_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
		{
		struct atbm_state *priv = fe->demodulator_priv;

		return atbm8830_write_reg(priv, REG_I2C_GATE, enable ? 1 : 0);
		}

		static struct dvb_frontend_ops atbm8830_ops = {
		.info = {
		.name = "AltoBeam ATBM8830/8831 DMB-TH",
		.type = FE_OFDM,
		.frequency_min = 474000000,
		.frequency_max = 858000000,
		.frequency_stepsize = 10000,
		.caps =
		FE_CAN_FEC_AUTO \|
		FE_CAN_QAM_AUTO \|
		FE_CAN_TRANSMISSION_MODE_AUTO \|
		FE_CAN_GUARD_INTERVAL_AUTO
		},

		.release = atbm8830_release,

		.init = atbm8830_init,
		.sleep = NULL,
		.write = NULL,
		.i2c_gate_ctrl = atbm8830_i2c_gate_ctrl,

		.set_frontend = atbm8830_set_fe,
		.get_frontend = atbm8830_get_fe,
		.get_tune_settings = atbm8830_get_tune_settings,

		.read_status = atbm8830_read_status,
		.read_ber = atbm8830_read_ber,
		.read_signal_strength = atbm8830_read_signal_strength,
		.read_snr = atbm8830_read_snr,
		.read_ucblocks = atbm8830_read_ucblocks,
		};

		struct dvb_frontend atbm8830_attach(const struct atbm8830_config config,
		struct i2c_adapter *i2c)
		{
		struct atbm_state *priv = NULL;
		u8 data = 0;

		dprintk("%s()\n", __func__);

		if (config == NULL \|\| i2c == NULL)
		return NULL;

		priv = kzalloc(sizeof(struct atbm_state), GFP_KERNEL);
		if (priv == NULL)
		goto error_out;

		priv->config = config;
		priv->i2c = i2c;

		/* check if the demod is there */
		if (atbm8830_read_reg(priv, REG_CHIP_ID, &data) != 0) {
		dprintk("%s atbm8830/8831 not found at i2c addr 0x%02X\n",
		__func__, priv->config->demod_address);
		goto error_out;
		}
		dprintk("atbm8830 chip id: 0x%02X\n", data);

		memcpy(&priv->frontend.ops, &atbm8830_ops,
		sizeof(struct dvb_frontend_ops));
		priv->frontend.demodulator_priv = priv;

		atbm8830_init(&priv->frontend);

		atbm8830_i2c_gate_ctrl(&priv->frontend, 1);

		return &priv->frontend;

		error_out:
		dprintk("%s() error_out\n", __func__);
		kfree(priv);
		return NULL;

		}
		EXPORT_SYMBOL(atbm8830_attach);

		MODULE_DESCRIPTION("AltoBeam ATBM8830/8831 GB20600 demodulator driver");
		MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
		MODULE_LICENSE("GPL");

drivers/media/dvb/frontends/atbm8830.h

0 → 100644

+76 −0

Original line number	Diff line number	Diff line
		/*
		* Support for AltoBeam GB20600 (a.k.a DMB-TH) demodulator
		* ATBM8830, ATBM8831
		*
		* Copyright (C) 2009 David T.L. Wong <davidtlwong@gmail.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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		*/

		#ifndef __ATBM8830_H__
		#define __ATBM8830_H__

		#include <linux/dvb/frontend.h>
		#include <linux/i2c.h>

		#define ATBM8830_PROD_8830 0
		#define ATBM8830_PROD_8831 1

		struct atbm8830_config {

		/* product type */
		u8 prod;

		/* the demodulator's i2c address */
		u8 demod_address;

		/* parallel or serial transport stream */
		u8 serial_ts;

		/* transport stream clock output only when receving valid stream */
		u8 ts_clk_gated;

		/* Decoder sample TS data at rising edge of clock */
		u8 ts_sampling_edge;

		/* Oscillator clock frequency */
		u32 osc_clk_freq; /* in kHz */

		/* IF frequency */
		u32 if_freq; /* in kHz */

		/* Swap I/Q for zero IF */
		u8 zif_swap_iq;

		/* Tuner AGC settings */
		u8 agc_min;
		u8 agc_max;
		u8 agc_hold_loop;
		};

		#if defined(CONFIG_DVB_ATBM8830) \|\| \
		(defined(CONFIG_DVB_ATBM8830_MODULE) && defined(MODULE))
		extern struct dvb_frontend atbm8830_attach(const struct atbm8830_config config,
		struct i2c_adapter *i2c);
		#else
		static inline
		struct dvb_frontend atbm8830_attach(const struct atbm8830_config config,
		struct i2c_adapter *i2c) {
		printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
		return NULL;
		}
		#endif /* CONFIG_DVB_ATBM8830 */

		#endif /* __ATBM8830_H__ */

drivers/media/dvb/frontends/atbm8830_priv.h

0 → 100644

+75 −0

Original line number	Diff line number	Diff line
		/*
		* Support for AltoBeam GB20600 (a.k.a DMB-TH) demodulator
		* ATBM8830, ATBM8831
		*
		* Copyright (C) 2009 David T.L. Wong <davidtlwong@gmail.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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		*/

		#ifndef __ATBM8830_PRIV_H
		#define __ATBM8830_PRIV_H

		struct atbm_state {
		struct i2c_adapter *i2c;
		/* configuration settings */
		const struct atbm8830_config *config;
		struct dvb_frontend frontend;
		};

		#define REG_CHIP_ID 0x0000
		#define REG_TUNER_BASEBAND 0x0001
		#define REG_DEMOD_RUN 0x0004
		#define REG_DSP_RESET 0x0005
		#define REG_RAM_RESET 0x0006
		#define REG_ADC_RESET 0x0007
		#define REG_TSPORT_RESET 0x0008
		#define REG_BLKERR_POL 0x000C
		#define REG_I2C_GATE 0x0103
		#define REG_TS_SAMPLE_EDGE 0x0301
		#define REG_TS_PKT_LEN_204 0x0302
		#define REG_TS_PKT_LEN_AUTO 0x0303
		#define REG_TS_SERIAL 0x0305
		#define REG_TS_CLK_FREERUN 0x0306
		#define REG_TS_VALID_MODE 0x0307
		#define REG_TS_CLK_MODE 0x030B /* 1 for serial, 0 for parallel */

		#define REG_TS_ERRBIT_USE 0x030C
		#define REG_LOCK_STATUS 0x030D
		#define REG_ADC_CONFIG 0x0602
		#define REG_CARRIER_OFFSET 0x0827 /* 0x0827-0x0829 little endian */
		#define REG_DETECTED_PN_MODE 0x082D
		#define REG_READ_LATCH 0x084D
		#define REG_IF_FREQ 0x0A00 /* 0x0A00-0x0A02 little endian */
		#define REG_OSC_CLK 0x0A03 /* 0x0A03-0x0A05 little endian */
		#define REG_BYPASS_CCI 0x0A06
		#define REG_ANALOG_LUMA_DETECTED 0x0A25
		#define REG_ANALOG_AUDIO_DETECTED 0x0A26
		#define REG_ANALOG_CHROMA_DETECTED 0x0A39
		#define REG_FRAME_ERR_CNT 0x0B04
		#define REG_USE_EXT_ADC 0x0C00
		#define REG_SWAP_I_Q 0x0C01
		#define REG_TPS_MANUAL 0x0D01
		#define REG_TPS_CONFIG 0x0D02
		#define REG_BYPASS_DEINTERLEAVER 0x0E00
		#define REG_AGC_TARGET 0x1003 /* 0x1003-0x1005 little endian */
		#define REG_AGC_MIN 0x1020
		#define REG_AGC_MAX 0x1023
		#define REG_AGC_LOCK 0x1027
		#define REG_AGC_PWM_VAL 0x1028 /* 0x1028-0x1029 little endian */
		#define REG_AGC_HOLD_LOOP 0x1031

		#endif