av7110_v4l.c

linux_dvb的驱动程序：linuxtv-dvb-1.1.1.rar

/*
 * av7110_v4l.c: av7110 video4linux interface for DVB and Siemens DVB-C analog module
 *
 * Copyright (C) 1999-2002 Ralph  Metzler
 *                       & Marcus Metzler for convergence integrated media GmbH
 *
 * originally based on code by:
 * Copyright (C) 1998,1999 Christian Theiss <[e-mail]>
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 *
 * the project's page is at http://www.linuxtv.org/dvb/
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/timer.h>
#include <linux/poll.h>
#include <linux/byteorder/swabb.h>
#include <linux/smp_lock.h>

#define DEBUG_VARIABLE av7110_debug
extern int av7110_debug;

#include "dvb_i2c.h"
#include "av7110.h"
#include "av7110_hw.h"
#include "av7110_av.h"
#include "dvb_functions.h"


int msp_writereg(struct av7110 *av7110, u8 dev, u16 reg, u16 val)
{
	u8 msg[5] = { dev, reg >> 8, reg & 0xff, val >> 8 , val & 0xff };
	struct dvb_i2c_bus *i2c = av7110->i2c_bus;
	struct i2c_msg msgs = { .flags = 0, .addr = 0x40, .len = 5, .buf = msg };

	if (i2c->xfer(i2c, &msgs, 1) != 1) {
		printk("av7110(%d): %s(%u = %u) failed\n",
		       av7110->dvb_adapter->num, __FUNCTION__, reg, val);
		return -EIO;
	}
	return 0;
}

int msp_readreg(struct av7110 *av7110, u8 dev, u16 reg, u16 *val)
{
	u8 msg1[3] = { dev, reg >> 8, reg & 0xff };
	u8 msg2[2];
	struct dvb_i2c_bus *i2c = av7110->i2c_bus;
	struct i2c_msg msgs[2] = {
		{ .flags = 0,	     .addr = 0x40, .len = 3, .buf = msg1 },
		{ .flags = I2C_M_RD, .addr = 0x40, .len = 2, .buf = msg2 }
	};

	if (i2c->xfer(i2c, msgs, 2) != 2) {
		printk("av7110(%d): %s(%u) failed\n",
		       av7110->dvb_adapter->num, __FUNCTION__, reg);
		return -EIO;
	}
	*val = (msg2[0] << 8) | msg2[1];
	return 0;
}



static struct v4l2_input inputs[2] = {
	{
		.index		= 0,
		.name		= "DVB",
		.type		= V4L2_INPUT_TYPE_CAMERA,
		.audioset	= 1,
		.tuner		= 0, /* ignored */
		.std		= V4L2_STD_PAL_BG|V4L2_STD_NTSC_M,
		.status		= 0,
	}, {
		.index		= 1,
		.name		= "Television",
		.type		= V4L2_INPUT_TYPE_TUNER,
		.audioset	= 2,
		.tuner		= 0,
		.std		= V4L2_STD_PAL_BG|V4L2_STD_NTSC_M,
		.status		= 0,
	}
};

/* for Siemens DVB-C analog module: (taken from ves1820.c) */
static int ves1820_writereg(struct saa7146_dev *dev, u8 reg, u8 data)
{
	u8 addr = 0x09;
	u8 buf[] = { 0x00, reg, data };
	struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = buf, .len = 3 };

	DEB_EE(("av7710: dev: %p\n", dev));

	if (1 != saa7146_i2c_transfer(dev, &msg, 1, 1))
		return -1;
	return 0;
}

static int tuner_write(struct saa7146_dev *dev, u8 addr, u8 data [4])
{
	struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = data, .len = 4 };

	DEB_EE(("av7710: dev: %p\n", dev));

	if (1 != saa7146_i2c_transfer(dev, &msg, 1, 1))
		return -1;
	return 0;
}


/**
 *   set up the downconverter frequency divisor for a
 *   reference clock comparision frequency of 62.5 kHz.
 */
static int tuner_set_tv_freq(struct saa7146_dev *dev, u32 freq)
{
	u32 div;
	u8 config;
	u8 buf[4];

	DEB_EE(("av7710: freq: 0x%08x\n", freq));

	/* magic number: 614. tuning with the frequency given by v4l2
	   is always off by 614*62.5 = 38375 kHz...*/
	div = freq + 614;

	buf[0] = (div >> 8) & 0x7f;
	buf[1] = div & 0xff;
	buf[2] = 0x8e;

	if (freq < (u32) (16 * 168.25))
		config = 0xa0;
	else if (freq < (u32) (16 * 447.25))
		config = 0x90;
	else
		config = 0x30;
	config &= ~0x02;

	buf[3] = config;

	return tuner_write(dev, 0x61, buf);
}


static struct saa7146_standard analog_standard[];
static struct saa7146_standard dvb_standard[];
static struct saa7146_standard standard[];

static struct v4l2_audio msp3400_v4l2_audio = {
	.index = 0,
	.name = "Television",
	.capability = V4L2_AUDCAP_STEREO
};

int av7110_dvb_c_switch(struct saa7146_fh *fh)
{
	struct saa7146_dev *dev = fh->dev;
	struct saa7146_vv *vv = dev->vv_data;
	struct av7110 *av7110 = (struct av7110*)dev->ext_priv;
	u16 adswitch;
	u8 band = 0;
	int source, sync;
	struct saa7146_fh *ov_fh = NULL;
	int restart_overlay = 0;

	DEB_EE(("av7110: %p\n", av7110));

	if (vv->ov_data != NULL) {
		ov_fh = vv->ov_data->fh;
		saa7146_stop_preview(ov_fh);
		restart_overlay = 1;
	}

	if (0 != av7110->current_input) {
		adswitch = 1;
		band = 0x60; /* analog band */
		source = SAA7146_HPS_SOURCE_PORT_B;
		sync = SAA7146_HPS_SYNC_PORT_B;
		memcpy(standard, analog_standard, sizeof(struct saa7146_standard) * 2);
		printk("av7110: switching to analog TV\n");
		msp_writereg(av7110, MSP_WR_DSP, 0x0008, 0x0000); // loudspeaker source
		msp_writereg(av7110, MSP_WR_DSP, 0x0009, 0x0000); // headphone source
		msp_writereg(av7110, MSP_WR_DSP, 0x000a, 0x0000); // SCART 1 source
		msp_writereg(av7110, MSP_WR_DSP, 0x000e, 0x3000); // FM matrix, mono
		msp_writereg(av7110, MSP_WR_DSP, 0x0000, 0x4f00); // loudspeaker + headphone
		msp_writereg(av7110, MSP_WR_DSP, 0x0007, 0x4f00); // SCART 1 volume
	} else {
		adswitch = 0;
		band = 0x20; /* digital band */
		source = SAA7146_HPS_SOURCE_PORT_A;
		sync = SAA7146_HPS_SYNC_PORT_A;
		memcpy(standard, dvb_standard, sizeof(struct saa7146_standard) * 2);
		printk("av7110: switching DVB mode\n");
		msp_writereg(av7110, MSP_WR_DSP, 0x0008, 0x0220); // loudspeaker source
		msp_writereg(av7110, MSP_WR_DSP, 0x0009, 0x0220); // headphone source
		msp_writereg(av7110, MSP_WR_DSP, 0x000a, 0x0220); // SCART 1 source
		msp_writereg(av7110, MSP_WR_DSP, 0x000e, 0x3000); // FM matrix, mono
		msp_writereg(av7110, MSP_WR_DSP, 0x0000, 0x7f00); // loudspeaker + headphone
		msp_writereg(av7110, MSP_WR_DSP, 0x0007, 0x7f00); // SCART 1 volume
	}

	/* hmm, this does not do anything!? */
	if (av7110_fw_cmd(av7110, COMTYPE_AUDIODAC, ADSwitch, 1, adswitch))
		printk("ADSwitch error\n");

	if (ves1820_writereg(dev, 0x0f, band))
		printk("setting band in demodulator failed.\n");
	saa7146_set_hps_source_and_sync(dev, source, sync);

	if (restart_overlay)
		saa7146_start_preview(ov_fh);

	return 0;
}

int av7110_ioctl(struct saa7146_fh *fh, unsigned int cmd, void *arg)
{
	struct saa7146_dev *dev = fh->dev;
	struct av7110 *av7110 = (struct av7110*) dev->ext_priv;
	DEB_EE(("saa7146_dev: %p\n", dev));

	switch (cmd) {
	case VIDIOC_G_TUNER:
	{
		struct v4l2_tuner *t = arg;
		u16 stereo_det;
		s8 stereo;

		DEB_EE(("VIDIOC_G_TUNER: %d\n", t->index));

		if (!av7110->has_analog_tuner || t->index != 0)
			return -EINVAL;

		memset(t, 0, sizeof(*t));
		strcpy(t->name, "Television");

		t->type = V4L2_TUNER_ANALOG_TV;
		t->capability = V4L2_TUNER_CAP_NORM | V4L2_TUNER_CAP_STEREO |
			V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2 | V4L2_TUNER_CAP_SAP;
		t->rangelow = 772;	/* 48.25 MHZ / 62.5 kHz = 772, see fi1216mk2-specs, page 2 */
		t->rangehigh = 13684;	/* 855.25 MHz / 62.5 kHz = 13684 */
		/* FIXME: add the real signal strength here */
		t->signal = 0xffff;
		t->afc = 0;

// FIXME: standard / stereo detection is still broken
msp_readreg(av7110, MSP_RD_DEM, 0x007e, &stereo_det);
printk("VIDIOC_G_TUNER: msp3400 TV standard detection: 0x%04x\n", stereo_det);

		msp_readreg(av7110, MSP_RD_DSP, 0x0018, &stereo_det);
		printk("VIDIOC_G_TUNER: msp3400 stereo detection: 0x%04x\n", stereo_det);
		stereo = (s8)(stereo_det >> 8);
		if (stereo > 0x10) {
			/* stereo */
			t->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
			t->audmode = V4L2_TUNER_MODE_STEREO;
		}
		else if (stereo < -0x10) {
			/* bilingual*/
			t->rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
			t->audmode = V4L2_TUNER_MODE_LANG1;
		}
		else /* mono */
			t->rxsubchans = V4L2_TUNER_SUB_MONO;

		return 0;
	}
	case VIDIOC_S_TUNER:
	{
		struct v4l2_tuner *t = arg;
		u16 fm_matrix, src;
		DEB_EE(("VIDIOC_S_TUNER: %d\n", t->index));

		if (!av7110->has_analog_tuner || av7110->current_input != 1)
			return -EINVAL;

		switch (t->audmode) {
		case V4L2_TUNER_MODE_STEREO:
			DEB_D(("VIDIOC_S_TUNER: V4L2_TUNER_MODE_STEREO\n"));
			fm_matrix = 0x3001; // stereo
			src = 0x0020;
			break;
		case V4L2_TUNER_MODE_LANG1:
			DEB_D(("VIDIOC_S_TUNER: V4L2_TUNER_MODE_LANG1\n"));
			fm_matrix = 0x3000; // mono
			src = 0x0000;
			break;
		case V4L2_TUNER_MODE_LANG2:
			DEB_D(("VIDIOC_S_TUNER: V4L2_TUNER_MODE_LANG2\n"));
			fm_matrix = 0x3000; // mono
			src = 0x0010;
			break;
		default: /* case V4L2_TUNER_MODE_MONO: {*/
			DEB_D(("VIDIOC_S_TUNER: TDA9840_SET_MONO\n"));
			fm_matrix = 0x3000; // mono
			src = 0x0030;
			break;
		}
		msp_writereg(av7110, MSP_WR_DSP, 0x000e, fm_matrix);
		msp_writereg(av7110, MSP_WR_DSP, 0x0008, src);
		msp_writereg(av7110, MSP_WR_DSP, 0x0009, src);
		msp_writereg(av7110, MSP_WR_DSP, 0x000a, src);
		return 0;
	}
	case VIDIOC_G_FREQUENCY:
	{
		struct v4l2_frequency *f = arg;

		DEB_EE(("VIDIOC_G_FREQ: freq:0x%08x.\n", f->frequency));

		if (!av7110->has_analog_tuner || av7110->current_input != 1)
			return -EINVAL;

		memset(f, 0, sizeof(*f));
		f->type = V4L2_TUNER_ANALOG_TV;
		f->frequency =	av7110->current_freq;
		return 0;
	}
	case VIDIOC_S_FREQUENCY:
	{
		struct v4l2_frequency *f = arg;

		DEB_EE(("VIDIOC_S_FREQUENCY: freq:0x%08x.\n", f->frequency));

		if (!av7110->has_analog_tuner || av7110->current_input != 1)
			return -EINVAL;

		if (V4L2_TUNER_ANALOG_TV != f->type)
			return -EINVAL;

		msp_writereg(av7110, MSP_WR_DSP, 0x0000, 0xffe0); // fast mute
		msp_writereg(av7110, MSP_WR_DSP, 0x0007, 0xffe0);

		/* tune in desired frequency */
		tuner_set_tv_freq(dev, f->frequency);
		av7110->current_freq = f->frequency;

		msp_writereg(av7110, MSP_WR_DSP, 0x0015, 0x003f); // start stereo detection
		msp_writereg(av7110, MSP_WR_DSP, 0x0015, 0x0000);