path: root/drivers/media/video/saa7134/saa7134-tvaudio.c

/*
 *
 * device driver for philips saa7134 based TV cards
 * tv audio decoder (fm stereo, nicam, ...)
 *
 * (c) 2001-03 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
 *
 *  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/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/freezer.h>
#include <asm/div64.h>

#include "saa7134-reg.h"
#include "saa7134.h"

/* ------------------------------------------------------------------ */

static unsigned int audio_debug;
module_param(audio_debug, int, 0644);
MODULE_PARM_DESC(audio_debug,"enable debug messages [tv audio]");

static unsigned int audio_ddep;
module_param(audio_ddep, int, 0644);
MODULE_PARM_DESC(audio_ddep,"audio ddep overwrite");

static int audio_clock_override = UNSET;
module_param(audio_clock_override, int, 0644);

static int audio_clock_tweak;
module_param(audio_clock_tweak, int, 0644);
MODULE_PARM_DESC(audio_clock_tweak, "Audio clock tick fine tuning for cards with audio crystal that's slightly off (range [-1024 .. 1024])");

#define dprintk(fmt, arg...)	if (audio_debug) \
	printk(KERN_DEBUG "%s/audio: " fmt, dev->name , ## arg)
#define d2printk(fmt, arg...)	if (audio_debug > 1) \
	printk(KERN_DEBUG "%s/audio: " fmt, dev->name, ## arg)

#define print_regb(reg) printk("%s:   reg 0x%03x [%-16s]: 0x%02x\n", \
		dev->name,(SAA7134_##reg),(#reg),saa_readb((SAA7134_##reg)))

/* msecs */
#define SCAN_INITIAL_DELAY     1000
#define SCAN_SAMPLE_DELAY       200
#define SCAN_SUBCARRIER_DELAY  2000

/* ------------------------------------------------------------------ */
/* saa7134 code                                                       */

static struct mainscan {
	char         *name;
	v4l2_std_id  std;
	int          carr;
} mainscan[] = {
	{
		.name = "MN",
		.std  = V4L2_STD_MN,
		.carr = 4500,
	},{
		.name = "BGH",
		.std  = V4L2_STD_B | V4L2_STD_GH,
		.carr = 5500,
	},{
		.name = "I",
		.std  = V4L2_STD_PAL_I,
		.carr = 6000,
	},{
		.name = "DKL",
		.std  = V4L2_STD_DK | V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC,
		.carr = 6500,
	}
};

static struct saa7134_tvaudio tvaudio[] = {
	{
		.name          = "PAL-B/G FM-stereo",
		.std           = V4L2_STD_PAL_BG,
		.mode          = TVAUDIO_FM_BG_STEREO,
		.carr1         = 5500,
		.carr2         = 5742,
	},{
		.name          = "PAL-D/K1 FM-stereo",
		.std           = V4L2_STD_PAL_DK,
		.carr1         = 6500,
		.carr2         = 6258,
		.mode          = TVAUDIO_FM_BG_STEREO,
	},{
		.name          = "PAL-D/K2 FM-stereo",
		.std           = V4L2_STD_PAL_DK,
		.carr1         = 6500,
		.carr2         = 6742,
		.mode          = TVAUDIO_FM_BG_STEREO,
	},{
		.name          = "PAL-D/K3 FM-stereo",
		.std           = V4L2_STD_PAL_DK,
		.carr1         = 6500,
		.carr2         = 5742,
		.mode          = TVAUDIO_FM_BG_STEREO,
	},{
		.name          = "PAL-B/G NICAM",
		.std           = V4L2_STD_PAL_BG,
		.carr1         = 5500,
		.carr2         = 5850,
		.mode          = TVAUDIO_NICAM_FM,
	},{
		.name          = "PAL-I NICAM",
		.std           = V4L2_STD_PAL_I,
		.carr1         = 6000,
		.carr2         = 6552,
		.mode          = TVAUDIO_NICAM_FM,
	},{
		.name          = "PAL-D/K NICAM",
		.std           = V4L2_STD_PAL_DK,
		.carr1         = 6500,
		.carr2         = 5850,
		.mode          = TVAUDIO_NICAM_FM,
	},{
		.name          = "SECAM-L NICAM",
		.std           = V4L2_STD_SECAM_L,
		.carr1         = 6500,
		.carr2         = 5850,
		.mode          = TVAUDIO_NICAM_AM,
	},{
		.name          = "SECAM-D/K NICAM"