msp3400-kthreads.c

来自「linux2.6.16版本」· C语言 代码 · 共 1,011 行 · 第 1/2 页

		for (this = 0; this < count; this++) {
			msp3400c_setcarrier(client, cd[this].cdo,cd[this].cdo);
			if (msp_sleep(state,100))
				goto restart;
			val = msp_read_dsp(client, 0x1b);
			if (val > 32767)
				val -= 65536;
			if (val1 < val)
				val1 = val, max1 = this;
			v4l_dbg(1, msp_debug, client, "carrier1 val: %5d / %s\n", val,cd[this].name);
		}

		/* carrier detect pass #2 -- second (stereo) carrier */
		switch (max1) {
		case 1: /* 5.5 */
			cd = msp3400c_carrier_detect_55;
			count = ARRAY_SIZE(msp3400c_carrier_detect_55);
			break;
		case 3: /* 6.5 */
			cd = msp3400c_carrier_detect_65;
			count = ARRAY_SIZE(msp3400c_carrier_detect_65);
			break;
		case 0: /* 4.5 */
		case 2: /* 6.0 */
		default:
			cd = NULL;
			count = 0;
			break;
		}

		if (msp_amsound && (state->v4l2_std & V4L2_STD_SECAM)) {
			/* autodetect doesn't work well with AM ... */
			cd = NULL;
			count = 0;
			max2 = 0;
		}
		for (this = 0; this < count; this++) {
			msp3400c_setcarrier(client, cd[this].cdo,cd[this].cdo);
			if (msp_sleep(state,100))
				goto restart;
			val = msp_read_dsp(client, 0x1b);
			if (val > 32767)
				val -= 65536;
			if (val2 < val)
				val2 = val, max2 = this;
			v4l_dbg(1, msp_debug, client, "carrier2 val: %5d / %s\n", val,cd[this].name);
		}

		/* program the msp3400 according to the results */
		state->main   = msp3400c_carrier_detect_main[max1].cdo;
		switch (max1) {
		case 1: /* 5.5 */
			if (max2 == 0) {
				/* B/G FM-stereo */
				state->second = msp3400c_carrier_detect_55[max2].cdo;
				msp3400c_setmode(client, MSP_MODE_FM_TERRA);
				state->nicam_on = 0;
				msp3400c_setstereo(client, V4L2_TUNER_MODE_MONO);
				state->watch_stereo = 1;
			} else if (max2 == 1 && state->has_nicam) {
				/* B/G NICAM */
				state->second = msp3400c_carrier_detect_55[max2].cdo;
				msp3400c_setmode(client, MSP_MODE_FM_NICAM1);
				state->nicam_on = 1;
				msp3400c_setcarrier(client, state->second, state->main);
				state->watch_stereo = 1;
			} else {
				goto no_second;
			}
			break;
		case 2: /* 6.0 */
			/* PAL I NICAM */
			state->second = MSP_CARRIER(6.552);
			msp3400c_setmode(client, MSP_MODE_FM_NICAM2);
			state->nicam_on = 1;
			msp3400c_setcarrier(client, state->second, state->main);
			state->watch_stereo = 1;
			break;
		case 3: /* 6.5 */
			if (max2 == 1 || max2 == 2) {
				/* D/K FM-stereo */
				state->second = msp3400c_carrier_detect_65[max2].cdo;
				msp3400c_setmode(client, MSP_MODE_FM_TERRA);
				state->nicam_on = 0;
				msp3400c_setstereo(client, V4L2_TUNER_MODE_MONO);
				state->watch_stereo = 1;
			} else if (max2 == 0 && (state->v4l2_std & V4L2_STD_SECAM)) {
				/* L NICAM or AM-mono */
				state->second = msp3400c_carrier_detect_65[max2].cdo;
				msp3400c_setmode(client, MSP_MODE_AM_NICAM);
				state->nicam_on = 0;
				msp3400c_setstereo(client, V4L2_TUNER_MODE_MONO);
				msp3400c_setcarrier(client, state->second, state->main);
				/* volume prescale for SCART (AM mono input) */
				msp_write_dsp(client, 0x000d, 0x1900);
				state->watch_stereo = 1;
			} else if (max2 == 0 && state->has_nicam) {
				/* D/K NICAM */
				state->second = msp3400c_carrier_detect_65[max2].cdo;
				msp3400c_setmode(client, MSP_MODE_FM_NICAM1);
				state->nicam_on = 1;
				msp3400c_setcarrier(client, state->second, state->main);
				state->watch_stereo = 1;
			} else {
				goto no_second;
			}
			break;
		case 0: /* 4.5 */
		default:
		no_second:
			state->second = msp3400c_carrier_detect_main[max1].cdo;
			msp3400c_setmode(client, MSP_MODE_FM_TERRA);
			state->nicam_on = 0;
			msp3400c_setcarrier(client, state->second, state->main);
			state->rxsubchans = V4L2_TUNER_SUB_MONO;
			msp3400c_setstereo(client, V4L2_TUNER_MODE_MONO);
			break;
		}

		/* unmute */
		msp_set_audio(client);

		if (msp_debug)
			msp3400c_print_mode(client);

		/* monitor tv audio mode */
		while (state->watch_stereo) {
			if (msp_sleep(state,5000))
				goto restart;
			watch_stereo(client);
		}
	}
	v4l_dbg(1, msp_debug, client, "thread: exit\n");
	return 0;
}


int msp3410d_thread(void *data)
{
	struct i2c_client *client = data;
	struct msp_state *state = i2c_get_clientdata(client);
	int val, i, std;

	v4l_dbg(1, msp_debug, client, "msp3410 daemon started\n");

	for (;;) {
		v4l_dbg(2, msp_debug, client, "msp3410 thread: sleep\n");
		msp_sleep(state,-1);
		v4l_dbg(2, msp_debug, client, "msp3410 thread: wakeup\n");

	restart:
		v4l_dbg(1, msp_debug, client, "thread: restart scan\n");
		state->restart = 0;
		if (kthread_should_stop())
			break;

		if (state->mode == MSP_MODE_EXTERN) {
			/* no carrier scan needed, just unmute */
			v4l_dbg(1, msp_debug, client, "thread: no carrier scan\n");
			msp_set_audio(client);
			continue;
		}

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

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

		/* start autodetect */
		if (state->radio)
			std = 0x40;
		else
			std = (state->v4l2_std & V4L2_STD_NTSC) ? 0x20 : 1;
		state->watch_stereo = 0;

		if (msp_debug)
			v4l_dbg(1, msp_debug, client, "setting standard: %s (0x%04x)\n",
			       msp_standard_std_name(std), std);

		if (std != 1) {
			/* programmed some specific mode */
			val = std;
		} else {
			/* triggered autodetect */
			msp_write_dem(client, 0x20, std);
			for (;;) {
				if (msp_sleep(state, 100))
					goto restart;

				/* check results */
				val = msp_read_dem(client, 0x7e);
				if (val < 0x07ff)
					break;
				v4l_dbg(1, msp_debug, client, "detection still in progress\n");
			}
		}
		for (i = 0; msp_stdlist[i].name != NULL; i++)
			if (msp_stdlist[i].retval == val)
				break;
		v4l_dbg(1, msp_debug, client, "current standard: %s (0x%04x)\n",
			msp_standard_std_name(val), val);
		state->main   = msp_stdlist[i].main;
		state->second = msp_stdlist[i].second;
		state->std = val;

		if (msp_amsound && !state->radio && (state->v4l2_std & V4L2_STD_SECAM) &&
				(val != 0x0009)) {
			/* autodetection has failed, let backup */
			v4l_dbg(1, msp_debug, client, "autodetection failed,"
				" switching to backup standard: %s (0x%04x)\n",
				msp_stdlist[8].name ? msp_stdlist[8].name : "unknown",val);
			val = 0x0009;
			msp_write_dem(client, 0x20, val);
		}

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

		/* set stereo */
		switch (val) {
		case 0x0008: /* B/G NICAM */
		case 0x000a: /* I NICAM */
			if (val == 0x0008)
				state->mode = MSP_MODE_FM_NICAM1;
			else
				state->mode = MSP_MODE_FM_NICAM2;
			/* just turn on stereo */
			state->rxsubchans = V4L2_TUNER_SUB_STEREO;
			state->nicam_on = 1;
			state->watch_stereo = 1;
			msp3400c_setstereo(client,V4L2_TUNER_MODE_STEREO);
			break;
		case 0x0009:
			state->mode = MSP_MODE_AM_NICAM;
			state->rxsubchans = V4L2_TUNER_SUB_MONO;
			state->nicam_on = 1;
			msp3400c_setstereo(client,V4L2_TUNER_MODE_MONO);
			state->watch_stereo = 1;
			break;
		case 0x0020: /* BTSC */
			/* just turn on stereo */
			state->mode = MSP_MODE_BTSC;
			state->rxsubchans = V4L2_TUNER_SUB_STEREO;
			state->nicam_on = 0;
			state->watch_stereo = 1;
			msp3400c_setstereo(client,V4L2_TUNER_MODE_STEREO);
			break;
		case 0x0040: /* FM radio */
			state->mode = MSP_MODE_FM_RADIO;
			state->rxsubchans = V4L2_TUNER_SUB_STEREO;
			state->audmode = V4L2_TUNER_MODE_STEREO;
			state->nicam_on = 0;
			state->watch_stereo = 0;
			/* not needed in theory if we 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 */
			msp_set_scart(client,SCART_IN2,0);
			/* msp34xx does radio decoding */
			msp_write_dsp(client, 0x08, 0x0020);
			msp_write_dsp(client, 0x09, 0x0020);
			msp_write_dsp(client, 0x0b, 0x0020);
			break;
		case 0x0003:
		case 0x0004:
		case 0x0005:
			state->mode = MSP_MODE_FM_TERRA;
			state->rxsubchans = V4L2_TUNER_SUB_MONO;
			state->audmode = V4L2_TUNER_MODE_MONO;
			state->nicam_on = 0;
			state->watch_stereo = 1;
			break;
		}

		/* unmute, restore misc registers */
		msp_set_audio(client);
		msp_write_dsp(client, 0x13, state->acb);
		if (state->has_i2s_conf)
			msp_write_dem(client, 0x40, state->i2s_mode);

		/* monitor tv audio mode */
		while (state->watch_stereo) {
			if (msp_sleep(state,5000))
				goto restart;
			watch_stereo(client);
		}
	}
	v4l_dbg(1, msp_debug, client, "thread: exit\n");
	return 0;
}

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

/* msp34xxG + (autoselect 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      */

/* set the same 'source' for the loudspeaker, scart and quasi-peak detector
 * the value for source is the same as bit 15:8 of DSP 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 msp_state *state = i2c_get_clientdata(client);

	/* fix matrix mode to stereo and let the msp choose what
	 * to output according to 'source', as recommended
	 * for MONO (source==0) downmixing set bit[7:0] to 0x30
	 */
	int value = (source & 0x07) << 8 | (source == 0 ? 0x30 : 0x20);

	v4l_dbg(1, msp_debug, client, "set source to %d (0x%x)\n", source, value);
	/* Loudspeaker Output */
	msp_write_dsp(client, 0x08, value);
	/* SCART1 DA Output */
	msp_write_dsp(client, 0x0a, value);
	/* Quasi-peak detector */
	msp_write_dsp(client, 0x0c, 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
	 */
	/* a2 threshold for stereo/bilingual */
	msp_write_dem(client, 0x22, msp_stereo_thresh);
	state->source = source;
}

/* (re-)initialize the msp34xxg, according to the current norm in state->norm
 * return 0 if it worked, -1 if it failed
 */
static int msp34xxg_reset(struct i2c_client *client)
{
	struct msp_state *state = i2c_get_clientdata(client);
	int modus, std;

	if (msp_reset(client))
		return -1;

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

	if (state->has_i2s_conf)
		msp_write_dem(client, 0x40, state->i2s_mode);

	/* step-by-step initialisation, as described in the manual */
	modus = msp_modus(client);
	if (state->radio)
		std = 0x40;
	else
		std = (state->v4l2_std & V4L2_STD_NTSC) ? 0x20 : 1;
	modus &= ~0x03; /* STATUS_CHANGE = 0 */
	modus |= 0x01;  /* AUTOMATIC_SOUND_DETECTION = 1 */
	if (msp_write_dem(client, 0x30, modus))
		return -1;
	if (msp_write_dem(client, 0x20, std))
		return -1;

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

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

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

	return 0;
}

int msp34xxg_thread(void *data)
{
	struct i2c_client *client = data;
	struct msp_state *state = i2c_get_clientdata(client);
	int val, std, i;

	v4l_dbg(1, msp_debug, client, "msp34xxg daemon started\n");

	state->source = 1; /* default */
	for (;;) {
		v4l_dbg(2, msp_debug, client, "msp34xxg thread: sleep\n");
		msp_sleep(state, -1);
		v4l_dbg(2, msp_debug, client, "msp34xxg thread: wakeup\n");

	restart:
		v4l_dbg(1, msp_debug, client, "thread: restart scan\n");
		state->restart = 0;
		if (kthread_should_stop())
			break;

		/* setup the chip*/
		msp34xxg_reset(client);
		std = msp_standard;
		if (std != 0x01)
			goto unmute;

		/* watch autodetect */
		v4l_dbg(1, msp_debug, client, "triggered autodetect, waiting for result\n");
		for (i = 0; i < 10; i++) {
			if (msp_sleep(state, 100))
				goto restart;

			/* check results */
			val = msp_read_dem(client, 0x7e);
			if (val < 0x07ff) {
				std = val;
				break;
			}
			v4l_dbg(2, msp_debug, client, "detection still in progress\n");
		}
		if (std == 1) {
			v4l_dbg(1, msp_debug, client, "detection still in progress after 10 tries. giving up.\n");
			continue;
		}

	unmute:
		state->std = std;
		v4l_dbg(1, msp_debug, client, "current standard: %s (0x%04x)\n",
			msp_standard_std_name(std), std);

		/* unmute: dispatch sound to scart output, set scart volume */
		msp_set_audio(client);

		/* restore ACB */
		if (msp_write_dsp(client, 0x13, state->acb))
			return -1;

		msp_write_dem(client, 0x40, state->i2s_mode);
	}
	v4l_dbg(1, msp_debug, client, "thread: exit\n");
	return 0;
}

void msp34xxg_detect_stereo(struct i2c_client *client)
{
	struct msp_state *state = i2c_get_clientdata(client);

	int status = msp_read_dem(client, 0x0200);
	int is_bilingual = status & 0x100;
	int is_stereo = status & 0x40;

	state->rxsubchans = 0;
	if (is_stereo)
		state->rxsubchans |= V4L2_TUNER_SUB_STEREO;
	else
		state->rxsubchans |= V4L2_TUNER_SUB_MONO;
	if (is_bilingual) {
		state->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.
		 */
	}
	v4l_dbg(1, msp_debug, client, "status=0x%x, stereo=%d, bilingual=%d -> rxsubchans=%d\n",
		status, is_stereo, is_bilingual, state->rxsubchans);
}

void msp34xxg_set_audmode(struct i2c_client *client, int audmode)
{
	struct msp_state *state = i2c_get_clientdata(client);
	int source;

	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 */
		break;
	default:
		audmode = 0;
		source  = 1;
		break;
	}
	state->audmode = audmode;
	msp34xxg_set_source(client, source);
}