msp3400.c

h内核

			msp3400c_print_mode(msp);

		/* monitor tv audio mode */
		while (msp->watch_stereo) {
			if (msp34xx_sleep(msp,5000))
				goto restart;
			watch_stereo(client);
		}
	}
	dprintk(KERN_DEBUG "msp3400: thread: exit\n");
	return 0;
}

/* ----------------------------------------------------------------------- */
/* this one uses the automatic sound standard detection of newer           */
/* msp34xx chip versions                                                   */

static struct MODES {
	int retval;
	int main, second;
	char *name;
} modelist[] = {
	{ 0x0000, 0, 0, "ERROR" },
	{ 0x0001, 0, 0, "autodetect start" },
	{ 0x0002, MSP_CARRIER(4.5), MSP_CARRIER(4.72), "4.5/4.72  M Dual FM-Stereo" },
	{ 0x0003, MSP_CARRIER(5.5), MSP_CARRIER(5.7421875), "5.5/5.74  B/G Dual FM-Stereo" },
	{ 0x0004, MSP_CARRIER(6.5), MSP_CARRIER(6.2578125), "6.5/6.25  D/K1 Dual FM-Stereo" },
	{ 0x0005, MSP_CARRIER(6.5), MSP_CARRIER(6.7421875), "6.5/6.74  D/K2 Dual FM-Stereo" },
	{ 0x0006, MSP_CARRIER(6.5), MSP_CARRIER(6.5), "6.5  D/K FM-Mono (HDEV3)" },
	{ 0x0008, MSP_CARRIER(5.5), MSP_CARRIER(5.85), "5.5/5.85  B/G NICAM FM" },
	{ 0x0009, MSP_CARRIER(6.5), MSP_CARRIER(5.85), "6.5/5.85  L NICAM AM" },
	{ 0x000a, MSP_CARRIER(6.0), MSP_CARRIER(6.55), "6.0/6.55  I NICAM FM" },
	{ 0x000b, MSP_CARRIER(6.5), MSP_CARRIER(5.85), "6.5/5.85  D/K NICAM FM" },
	{ 0x000c, MSP_CARRIER(6.5), MSP_CARRIER(5.85), "6.5/5.85  D/K NICAM FM (HDEV2)" },
	{ 0x0020, MSP_CARRIER(4.5), MSP_CARRIER(4.5), "4.5  M BTSC-Stereo" },
	{ 0x0021, MSP_CARRIER(4.5), MSP_CARRIER(4.5), "4.5  M BTSC-Mono + SAP" },
	{ 0x0030, MSP_CARRIER(4.5), MSP_CARRIER(4.5), "4.5  M EIA-J Japan Stereo" },
	{ 0x0040, MSP_CARRIER(10.7), MSP_CARRIER(10.7), "10.7  FM-Stereo Radio" },
	{ 0x0050, MSP_CARRIER(6.5), MSP_CARRIER(6.5), "6.5  SAT-Mono" },
	{ 0x0051, MSP_CARRIER(7.02), MSP_CARRIER(7.20), "7.02/7.20  SAT-Stereo" },
	{ 0x0060, MSP_CARRIER(7.2), MSP_CARRIER(7.2), "7.2  SAT ADR" },
	{     -1, 0, 0, NULL }, /* EOF */
};

static inline const char *msp34xx_standard_mode_name(int mode)
{
	int i;
	for (i = 0; modelist[i].name != NULL; i++)
		if (modelist[i].retval == mode)
			return modelist[i].name;
	return "unknown";
}

static int msp34xx_modus(int norm)
{
	switch (norm) {
	case VIDEO_MODE_PAL:
		return 0x1003;
	case VIDEO_MODE_NTSC:  /* BTSC */
		return 0x2003;
	case VIDEO_MODE_SECAM:
		return 0x0003;
	case VIDEO_MODE_RADIO:
		return 0x0003;
	case VIDEO_MODE_AUTO:
		return 0x2003;
	default:
		return 0x0003;
	}
}

static int msp34xx_standard(int norm)
{
	switch (norm) {
	case VIDEO_MODE_PAL:
		return 1;
	case VIDEO_MODE_NTSC:  /* BTSC */
		return 0x0020;
	case VIDEO_MODE_SECAM:
		return 1;
	case VIDEO_MODE_RADIO:
		return 0x0040;
	default:
		return 1;
	}
}

static int msp3410d_thread(void *data)
{
	struct i2c_client *client = data;
	struct msp3400c *msp = i2c_get_clientdata(client);
	int mode,val,i,std;

	printk("msp3410: daemon started\n");
	for (;;) {
		d2printk(KERN_DEBUG "msp3410: thread: sleep\n");
		msp34xx_sleep(msp,-1);
		d2printk(KERN_DEBUG "msp3410: thread: wakeup\n");

	restart:
		dprintk("msp3410: thread: restart scan\n");
		msp->restart = 0;
		if (kthread_should_stop())
			break;

		if (msp->mode == MSP_MODE_EXTERN) {
			/* no carrier scan needed, just unmute */
			dprintk(KERN_DEBUG "msp3410: thread: no carrier scan\n");
			msp3400c_setvolume(client, msp->muted,
					   msp->volume, msp->balance);
			continue;
		}

		/* put into sane state (and mute) */
		msp3400c_reset(client);

		/* some time for the tuner to sync */
		if (msp34xx_sleep(msp,200))
			goto restart;

		/* start autodetect */
		mode = msp34xx_modus(msp->norm);
		std  = msp34xx_standard(msp->norm);
		msp3400c_write(client, I2C_MSP3400C_DEM, 0x30, mode);
		msp3400c_write(client, I2C_MSP3400C_DEM, 0x20, std);
		msp->watch_stereo = 0;

		if (debug)
			printk(KERN_DEBUG "msp3410: setting mode: %s (0x%04x)\n",
			       msp34xx_standard_mode_name(std) ,std);

		if (std != 1) {
			/* programmed some specific mode */
			val = std;
		} else {
			/* triggered autodetect */
			for (;;) {
				if (msp34xx_sleep(msp,100))
					goto restart;

				/* check results */
				val = msp3400c_read(client, I2C_MSP3400C_DEM, 0x7e);
				if (val < 0x07ff)
					break;
				dprintk(KERN_DEBUG "msp3410: detection still in progress\n");
			}
		}
		for (i = 0; modelist[i].name != NULL; i++)
			if (modelist[i].retval == val)
				break;
		dprintk(KERN_DEBUG "msp3410: current mode: %s (0x%04x)\n",
			modelist[i].name ? modelist[i].name : "unknown",
			val);
		msp->main   = modelist[i].main;
		msp->second = modelist[i].second;

		if (amsound && (msp->norm == VIDEO_MODE_SECAM) && (val != 0x0009)) {
			/* autodetection has failed, let backup */
			dprintk(KERN_DEBUG "msp3410: autodetection failed,"
				" switching to backup mode: %s (0x%04x)\n",
				modelist[8].name ? modelist[8].name : "unknown",val);
			val = 0x0009;
			msp3400c_write(client, I2C_MSP3400C_DEM, 0x20, val);
		}

		/* set various prescales */
		msp3400c_write(client, I2C_MSP3400C_DFP, 0x0d, 0x1900); /* scart */
		msp3400c_write(client, I2C_MSP3400C_DFP, 0x0e, 0x2403); /* FM */
		msp3400c_write(client, I2C_MSP3400C_DFP, 0x10, 0x5a00); /* nicam */

		/* set stereo */
		switch (val) {
		case 0x0008: /* B/G NICAM */
		case 0x000a: /* I NICAM */
			if (val == 0x0008)
				msp->mode = MSP_MODE_FM_NICAM1;
			else
				msp->mode = MSP_MODE_FM_NICAM2;
			/* just turn on stereo */
			msp->rxsubchans = V4L2_TUNER_SUB_STEREO;
			msp->nicam_on = 1;
			msp->watch_stereo = 1;
			msp3400c_set_audmode(client,V4L2_TUNER_MODE_STEREO);
			break;
		case 0x0009:
			msp->mode = MSP_MODE_AM_NICAM;
			msp->rxsubchans = V4L2_TUNER_SUB_MONO;
			msp->nicam_on = 1;
			msp3400c_set_audmode(client,V4L2_TUNER_MODE_MONO);
			msp->watch_stereo = 1;
			break;
		case 0x0020: /* BTSC */
			/* just turn on stereo */
			msp->mode = MSP_MODE_BTSC;
			msp->rxsubchans = V4L2_TUNER_SUB_STEREO;
			msp->nicam_on = 0;
			msp->watch_stereo = 1;
			msp3400c_set_audmode(client,V4L2_TUNER_MODE_STEREO);
			break;
		case 0x0040: /* FM radio */
			msp->mode   = MSP_MODE_FM_RADIO;
			msp->rxsubchans = V4L2_TUNER_SUB_STEREO;
			msp->audmode = V4L2_TUNER_MODE_STEREO;
			msp->nicam_on = 0;
			msp->watch_stereo = 0;
			/* not needed in theory if HAVE_RADIO(), but
			   short programming enables carrier mute */
			msp3400c_setmode(client,MSP_MODE_FM_RADIO);
			msp3400c_setcarrier(client, MSP_CARRIER(10.7),
					    MSP_CARRIER(10.7));
			/* scart routing */
			msp3400c_set_scart(client,SCART_IN2,0);
#if 0
			/* radio from SCART_IN2 */
			msp3400c_write(client,I2C_MSP3400C_DFP, 0x08, 0x0220);
			msp3400c_write(client,I2C_MSP3400C_DFP, 0x09, 0x0220);
			msp3400c_write(client,I2C_MSP3400C_DFP, 0x0b, 0x0220);
#else
			/* msp34xx does radio decoding */
			msp3400c_write(client,I2C_MSP3400C_DFP, 0x08, 0x0020);
			msp3400c_write(client,I2C_MSP3400C_DFP, 0x09, 0x0020);
			msp3400c_write(client,I2C_MSP3400C_DFP, 0x0b, 0x0020);
#endif
			break;
		case 0x0003:
		case 0x0004:
		case 0x0005:
			msp->mode   = MSP_MODE_FM_TERRA;
			msp->rxsubchans = V4L2_TUNER_SUB_MONO;
			msp->audmode = V4L2_TUNER_MODE_MONO;
			msp->nicam_on = 0;
			msp->watch_stereo = 1;
			break;
		}

		/* unmute, restore misc registers */
		msp3400c_setbass(client, msp->bass);
		msp3400c_settreble(client, msp->treble);
		msp3400c_setvolume(client, msp->muted,
				    msp->volume, msp->balance);
		msp3400c_write(client, I2C_MSP3400C_DFP, 0x0013, msp->acb);

		/* monitor tv audio mode */
		while (msp->watch_stereo) {
			if (msp34xx_sleep(msp,5000))
				goto restart;
			watch_stereo(client);
		}
	}
	dprintk(KERN_DEBUG "msp3410: thread: exit\n");
	return 0;
}

/* ----------------------------------------------------------------------- */
/* msp34xxG + (simpler no-thread)                                          */
/* this one uses both automatic standard detection and automatic sound     */
/* select which are available in the newer G versions                      */
/* struct msp: only norm, acb and source are really used in this mode      */

static void msp34xxg_set_source(struct i2c_client *client, int source);

/* (re-)initialize the msp34xxg, according to the current norm in msp->norm
 * return 0 if it worked, -1 if it failed
 */
static int msp34xxg_init(struct i2c_client *client)
{
	struct msp3400c *msp = i2c_get_clientdata(client);
	int modus,std;

	if (msp3400c_reset(client))
		return -1;

	/* make sure that input/output is muted (paranoid mode) */
	if (msp3400c_write(client,
			   I2C_MSP3400C_DFP,
			   0x13, /* ACB */
			   0x0f20 /* mute DSP input, mute SCART 1 */))
		return -1;

	/* step-by-step initialisation, as described in the manual */
	modus = msp34xx_modus(msp->norm);
	std   = msp34xx_standard(msp->norm);
	modus &= ~0x03; /* STATUS_CHANGE=0 */
	modus |= 0x01;  /* AUTOMATIC_SOUND_DETECTION=1 */
	if (msp3400c_write(client,
			   I2C_MSP3400C_DEM,
			   0x30/*MODUS*/,
			   modus))
		return -1;
	if (msp3400c_write(client,
			   I2C_MSP3400C_DEM,
			   0x20/*stanard*/,
			   std))
		return -1;

	/* write the dfps that may have an influence on
	   standard/audio autodetection right now */
	msp34xxg_set_source(client, msp->source);

	if (msp3400c_write(client, I2C_MSP3400C_DFP,
			   0x0e, /* AM/FM Prescale */
			   0x3000 /* default: [15:8] 75khz deviation */))
		return -1;

	if (msp3400c_write(client, I2C_MSP3400C_DFP,
			   0x10, /* NICAM Prescale */
			   0x5a00 /* default: 9db gain (as recommended) */))
		return -1;

	if (msp3400c_write(client,
			   I2C_MSP3400C_DEM,
			   0x20, /* STANDARD SELECT  */
			   standard /* default: 0x01 for automatic standard select*/))
		return -1;
	return 0;
}

static int msp34xxg_thread(void *data)
{
	struct i2c_client *client = data;
	struct msp3400c *msp = i2c_get_clientdata(client);
	int val, std, i;

	printk("msp34xxg: daemon started\n");
	for (;;) {
		d2printk(KERN_DEBUG "msp34xxg: thread: sleep\n");
		msp34xx_sleep(msp,-1);
		d2printk(KERN_DEBUG "msp34xxg: thread: wakeup\n");

	restart:
		dprintk("msp34xxg: thread: restart scan\n");
		msp->restart = 0;
		if (kthread_should_stop())
			break;

		/* setup the chip*/
		msp34xxg_init(client);
		std = standard;
		if (std != 0x01)
			goto unmute;

		/* watch autodetect */
		dprintk("msp34xxg: triggered autodetect, waiting for result\n");
		for (i = 0; i < 10; i++) {
			if (msp34xx_sleep(msp,100))
				goto restart;

			/* check results */
			val = msp3400c_read(client, I2C_MSP3400C_DEM, 0x7e);
			if (val < 0x07ff) {
				std = val;
				break;
			}
			dprintk("msp34xxg: detection still in progress\n");
		}
		if (0x01 == std) {
			dprintk("msp34xxg: detection still in progress after 10 tries. giving up.\n");
			continue;
		}

	unmute:
		dprintk("msp34xxg: current mode: %s (0x%04x)\n",
			msp34xx_standard_mode_name(std), std);

		/* unmute: dispatch sound to scart output, set scart volume */
		dprintk("msp34xxg: unmute\n");

		msp3400c_setbass(client, msp->bass);
		msp3400c_settreble(client, msp->treble);
		msp3400c_setvolume(client, msp->muted, msp->volume, msp->balance);

		/* restore ACB */
		if (msp3400c_write(client,
				   I2C_MSP3400C_DFP,
				   0x13, /* ACB */
				   msp->acb))
			return -1;
	}
	dprintk(KERN_DEBUG "msp34xxg: thread: exit\n");
	return 0;
}

/* set the same 'source' for the loudspeaker, scart and quasi-peak detector
 * the value for source is the same as bit 15:8 of DFP registers 0x08,
 * 0x0a and 0x0c: 0=mono, 1=stereo or A|B, 2=SCART, 3=stereo or A, 4=stereo or B
 *
 * this function replaces msp3400c_setstereo
 */
static void msp34xxg_set_source(struct i2c_client *client, int source)
{
	struct msp3400c *msp = i2c_get_clientdata(client);

	/* fix matrix mode to stereo and let the msp choose what
	 * to output according to 'source', as recommended
	 */
	int value = (source&0x07)<<8|(source==0 ? 0x00:0x20);
	dprintk("msp34xxg: set source to %d (0x%x)\n", source, value);
	msp3400c_write(client,
		       I2C_MSP3400C_DFP,
		       0x08, /* Loudspeaker Output */
		       value);
	msp3400c_write(client,
		       I2C_MSP3400C_DFP,
		       0x0a, /* SCART1 DA Output */
		       value);
	msp3400c_write(client,
		       I2C_MSP3400C_DFP,
		       0x0c, /* Quasi-peak detector */
		       value);
	/*
	 * set identification threshold. Personally, I
	 * I set it to a higher value that the default
	 * of 0x190 to ignore noisy stereo signals.
	 * this needs tuning. (recommended range 0x00a0-0x03c0)
	 * 0x7f0 = forced mono mode
	 */
	msp3400c_write(client,
		       I2C_MSP3400C_DEM,
		       0x22, /* a2 threshold for stereo/bilingual */
		       source==0 ? 0x7f0:stereo_threshold);
	msp->source=source;
}

static void msp34xxg_detect_stereo(struct i2c_client *client)
{
	struct msp3400c *msp = i2c_get_clientdata(client);

	int status = msp3400c_read(client,
				   I2C_MSP3400C_DEM,
				   0x0200 /* STATUS */);
	int is_bilingual = status&0x100;
	int is_stereo = status&0x40;

	msp->rxsubchans = 0;
	if (is_stereo)
		msp->rxsubchans |= V4L2_TUNER_SUB_STEREO;
	else
		msp->rxsubchans |= V4L2_TUNER_SUB_MONO;
	if (is_bilingual) {
		msp->rxsubchans |= V4L2_TUNER_SUB_LANG1|V4L2_TUNER_SUB_LANG2;
		/* I'm supposed to check whether it's SAP or not
		 * and set only LANG2/SAP in this case. Yet, the MSP
		 * does a lot of work to hide this and handle everything
		 * the same way. I don't want to work around it so unless
		 * this is a problem, I'll handle SAP just like lang1/lang2.
		 */
	}
	dprintk("msp34xxg: status=0x%x, stereo=%d, bilingual=%d -> rxsubchans=%d\n",
		status, is_stereo, is_bilingual, msp->rxsubchans);
}

static void msp34xxg_set_audmode(struct i2c_client *client, int audmode)
{
	struct msp3400c *msp = i2c_get_clientdata(client);
	int source = 0;

	switch (audmode) {
	case V4L2_TUNER_MODE_MONO:
		source=0; /* mono only */
		break;
	case V4L2_TUNER_MODE_STEREO:
		source=1; /* stereo or A|B, see comment in msp34xxg_get_v4l2_stereo() */
		/* problem: that could also mean 2 (scart input) */
		break;
	case V4L2_TUNER_MODE_LANG1:
		source=3; /* stereo or A */
		break;
	case V4L2_TUNER_MODE_LANG2:
		source=4; /* stereo or B */