msp3400-kthreads.c

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

/*
 * Programming the mspx4xx sound processor family
 *
 * (c) 1997-2001 Gerd Knorr <[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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */


#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/videodev.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/audiochip.h>
#include <linux/kthread.h>
#include <linux/suspend.h>
#include "msp3400.h"

/* this one uses the automatic sound standard detection of newer msp34xx
   chip versions */
static struct {
	int retval;
	int main, second;
	char *name;
} msp_stdlist[] = {
	{ 0x0000, 0, 0, "could not detect sound standard" },
	{ 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 struct msp3400c_init_data_dem {
	int fir1[6];
	int fir2[6];
	int cdo1;
	int cdo2;
	int ad_cv;
	int mode_reg;
	int dsp_src;
	int dsp_matrix;
} msp3400c_init_data[] = {
	{	/* AM (for carrier detect / msp3400) */
		{75, 19, 36, 35, 39, 40},
		{75, 19, 36, 35, 39, 40},
		MSP_CARRIER(5.5), MSP_CARRIER(5.5),
		0x00d0, 0x0500, 0x0020, 0x3000
	},{	/* AM (for carrier detect / msp3410) */
		{-1, -1, -8, 2, 59, 126},
		{-1, -1, -8, 2, 59, 126},
		MSP_CARRIER(5.5), MSP_CARRIER(5.5),
		0x00d0, 0x0100, 0x0020, 0x3000
	},{	/* FM Radio */
		{-8, -8, 4, 6, 78, 107},
		{-8, -8, 4, 6, 78, 107},
		MSP_CARRIER(10.7), MSP_CARRIER(10.7),
		0x00d0, 0x0480, 0x0020, 0x3000
	},{	/* Terrestial FM-mono + FM-stereo */
		{3, 18, 27, 48, 66, 72},
		{3, 18, 27, 48, 66, 72},
		MSP_CARRIER(5.5), MSP_CARRIER(5.5),
		0x00d0, 0x0480, 0x0030, 0x3000
	},{	/* Sat FM-mono */
		{ 1, 9, 14, 24, 33, 37},
		{ 3, 18, 27, 48, 66, 72},
		MSP_CARRIER(6.5), MSP_CARRIER(6.5),
		0x00c6, 0x0480, 0x0000, 0x3000
	},{	/* NICAM/FM --  B/G (5.5/5.85), D/K (6.5/5.85) */
		{-2, -8, -10, 10, 50, 86},
		{3, 18, 27, 48, 66, 72},
		MSP_CARRIER(5.5), MSP_CARRIER(5.5),
		0x00d0, 0x0040, 0x0120, 0x3000
	},{	/* NICAM/FM -- I (6.0/6.552) */
		{2, 4, -6, -4, 40, 94},
		{3, 18, 27, 48, 66, 72},
		MSP_CARRIER(6.0), MSP_CARRIER(6.0),
		0x00d0, 0x0040, 0x0120, 0x3000
	},{	/* NICAM/AM -- L (6.5/5.85) */
		{-2, -8, -10, 10, 50, 86},
		{-4, -12, -9, 23, 79, 126},
		MSP_CARRIER(6.5), MSP_CARRIER(6.5),
		0x00c6, 0x0140, 0x0120, 0x7c03
	},
};

struct msp3400c_carrier_detect {
	int   cdo;
	char *name;
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_main[] = {
	/* main carrier */
	{ MSP_CARRIER(4.5),        "4.5   NTSC"                   },
	{ MSP_CARRIER(5.5),        "5.5   PAL B/G"                },
	{ MSP_CARRIER(6.0),        "6.0   PAL I"                  },
	{ MSP_CARRIER(6.5),        "6.5   PAL D/K + SAT + SECAM"  }
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_55[] = {
	/* PAL B/G */
	{ MSP_CARRIER(5.7421875),  "5.742 PAL B/G FM-stereo"     },
	{ MSP_CARRIER(5.85),       "5.85  PAL B/G NICAM"         }
};

static struct msp3400c_carrier_detect msp3400c_carrier_detect_65[] = {
	/* PAL SAT / SECAM */
	{ MSP_CARRIER(5.85),       "5.85  PAL D/K + SECAM NICAM" },
	{ MSP_CARRIER(6.2578125),  "6.25  PAL D/K1 FM-stereo" },
	{ MSP_CARRIER(6.7421875),  "6.74  PAL D/K2 FM-stereo" },
	{ MSP_CARRIER(7.02),       "7.02  PAL SAT FM-stereo s/b" },
	{ MSP_CARRIER(7.20),       "7.20  PAL SAT FM-stereo s"   },
	{ MSP_CARRIER(7.38),       "7.38  PAL SAT FM-stereo b"   },
};

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

const char *msp_standard_std_name(int std)
{
	int i;

	for (i = 0; msp_stdlist[i].name != NULL; i++)
		if (msp_stdlist[i].retval == std)
			return msp_stdlist[i].name;
	return "unknown";
}

void msp3400c_setcarrier(struct i2c_client *client, int cdo1, int cdo2)
{
	msp_write_dem(client, 0x0093, cdo1 & 0xfff);
	msp_write_dem(client, 0x009b, cdo1 >> 12);
	msp_write_dem(client, 0x00a3, cdo2 & 0xfff);
	msp_write_dem(client, 0x00ab, cdo2 >> 12);
	msp_write_dem(client, 0x0056, 0); /*LOAD_REG_1/2*/
}

void msp3400c_setmode(struct i2c_client *client, int type)
{
	struct msp_state *state = i2c_get_clientdata(client);
	int i;

	v4l_dbg(1, msp_debug, client, "setmode: %d\n", type);
	state->mode       = type;
	state->audmode    = V4L2_TUNER_MODE_MONO;
	state->rxsubchans = V4L2_TUNER_SUB_MONO;

	msp_write_dem(client, 0x00bb, msp3400c_init_data[type].ad_cv);

	for (i = 5; i >= 0; i--)               /* fir 1 */
		msp_write_dem(client, 0x0001, msp3400c_init_data[type].fir1[i]);

	msp_write_dem(client, 0x0005, 0x0004); /* fir 2 */
	msp_write_dem(client, 0x0005, 0x0040);
	msp_write_dem(client, 0x0005, 0x0000);
	for (i = 5; i >= 0; i--)
		msp_write_dem(client, 0x0005, msp3400c_init_data[type].fir2[i]);

	msp_write_dem(client, 0x0083, msp3400c_init_data[type].mode_reg);

	msp3400c_setcarrier(client, msp3400c_init_data[type].cdo1,
			    msp3400c_init_data[type].cdo2);

	msp_write_dem(client, 0x0056, 0); /*LOAD_REG_1/2*/

	if (msp_dolby) {
		msp_write_dsp(client, 0x0008, 0x0520); /* I2S1 */
		msp_write_dsp(client, 0x0009, 0x0620); /* I2S2 */
		msp_write_dsp(client, 0x000b, msp3400c_init_data[type].dsp_src);
	} else {
		msp_write_dsp(client, 0x0008, msp3400c_init_data[type].dsp_src);
		msp_write_dsp(client, 0x0009, msp3400c_init_data[type].dsp_src);
		msp_write_dsp(client, 0x000b, msp3400c_init_data[type].dsp_src);
	}
	msp_write_dsp(client, 0x000a, msp3400c_init_data[type].dsp_src);
	msp_write_dsp(client, 0x000e, msp3400c_init_data[type].dsp_matrix);

	if (state->has_nicam) {
		/* nicam prescale */
		msp_write_dsp(client, 0x0010, 0x5a00); /* was: 0x3000 */
	}
}

/* turn on/off nicam + stereo */
void msp3400c_setstereo(struct i2c_client *client, int mode)
{
	static char *strmode[] = { "mono", "stereo", "lang2", "lang1" };
	struct msp_state *state = i2c_get_clientdata(client);
	int nicam = 0;		/* channel source: FM/AM or nicam */
	int src = 0;

	if (state->opmode == OPMODE_AUTOSELECT) {
		/* this method would break everything, let's make sure
		 * it's never called
		 */
		v4l_dbg(1, msp_debug, client, "setstereo called with mode=%d instead of set_source (ignored)\n",
		     mode);
		return;
	}

	/* switch demodulator */
	switch (state->mode) {
	case MSP_MODE_FM_TERRA:
		v4l_dbg(1, msp_debug, client, "FM setstereo: %s\n", strmode[mode]);
		msp3400c_setcarrier(client, state->second, state->main);
		switch (mode) {
		case V4L2_TUNER_MODE_STEREO:
			msp_write_dsp(client, 0x000e, 0x3001);
			break;
		case V4L2_TUNER_MODE_MONO:
		case V4L2_TUNER_MODE_LANG1:
		case V4L2_TUNER_MODE_LANG2:
			msp_write_dsp(client, 0x000e, 0x3000);
			break;
		}
		break;
	case MSP_MODE_FM_SAT:
		v4l_dbg(1, msp_debug, client, "SAT setstereo: %s\n", strmode[mode]);
		switch (mode) {
		case V4L2_TUNER_MODE_MONO:
			msp3400c_setcarrier(client, MSP_CARRIER(6.5), MSP_CARRIER(6.5));
			break;
		case V4L2_TUNER_MODE_STEREO:
			msp3400c_setcarrier(client, MSP_CARRIER(7.2), MSP_CARRIER(7.02));
			break;
		case V4L2_TUNER_MODE_LANG1:
			msp3400c_setcarrier(client, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
			break;
		case V4L2_TUNER_MODE_LANG2:
			msp3400c_setcarrier(client, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
			break;
		}
		break;
	case MSP_MODE_FM_NICAM1:
	case MSP_MODE_FM_NICAM2:
	case MSP_MODE_AM_NICAM:
		v4l_dbg(1, msp_debug, client, "NICAM setstereo: %s\n",strmode[mode]);
		msp3400c_setcarrier(client,state->second,state->main);
		if (state->nicam_on)
			nicam=0x0100;
		break;
	case MSP_MODE_BTSC:
		v4l_dbg(1, msp_debug, client, "BTSC setstereo: %s\n",strmode[mode]);
		nicam=0x0300;
		break;
	case MSP_MODE_EXTERN:
		v4l_dbg(1, msp_debug, client, "extern setstereo: %s\n",strmode[mode]);
		nicam = 0x0200;
		break;
	case MSP_MODE_FM_RADIO:
		v4l_dbg(1, msp_debug, client, "FM-Radio setstereo: %s\n",strmode[mode]);
		break;
	default:
		v4l_dbg(1, msp_debug, client, "mono setstereo\n");
		return;
	}

	/* switch audio */
	switch (mode) {
	case V4L2_TUNER_MODE_STEREO:
		src = 0x0020 | nicam;
		break;
	case V4L2_TUNER_MODE_MONO:
		if (state->mode == MSP_MODE_AM_NICAM) {
			v4l_dbg(1, msp_debug, client, "switching to AM mono\n");
			/* AM mono decoding is handled by tuner, not MSP chip */
			/* SCART switching control register */
			msp_set_scart(client, SCART_MONO, 0);
			src = 0x0200;
			break;
		}
	case V4L2_TUNER_MODE_LANG1:
		src = 0x0000 | nicam;
		break;
	case V4L2_TUNER_MODE_LANG2:
		src = 0x0010 | nicam;
		break;
	}
	v4l_dbg(1, msp_debug, client, "setstereo final source/matrix = 0x%x\n", src);

	if (msp_dolby) {
		msp_write_dsp(client, 0x0008, 0x0520);
		msp_write_dsp(client, 0x0009, 0x0620);
		msp_write_dsp(client, 0x000a, src);
		msp_write_dsp(client, 0x000b, src);
	} else {
		msp_write_dsp(client, 0x0008, src);
		msp_write_dsp(client, 0x0009, src);
		msp_write_dsp(client, 0x000a, src);
		msp_write_dsp(client, 0x000b, src);
		msp_write_dsp(client, 0x000c, src);
		if (state->has_scart23_in_scart2_out)
			msp_write_dsp(client, 0x0041, src);
	}
}

static void msp3400c_print_mode(struct i2c_client *client)
{
	struct msp_state *state = i2c_get_clientdata(client);

	if (state->main == state->second) {
		v4l_dbg(1, msp_debug, client, "mono sound carrier: %d.%03d MHz\n",
		       state->main / 910000, (state->main / 910) % 1000);
	} else {
		v4l_dbg(1, msp_debug, client, "main sound carrier: %d.%03d MHz\n",
		       state->main / 910000, (state->main / 910) % 1000);
	}
	if (state->mode == MSP_MODE_FM_NICAM1 || state->mode == MSP_MODE_FM_NICAM2)
		v4l_dbg(1, msp_debug, client, "NICAM/FM carrier  : %d.%03d MHz\n",
		       state->second / 910000, (state->second/910) % 1000);
	if (state->mode == MSP_MODE_AM_NICAM)
		v4l_dbg(1, msp_debug, client, "NICAM/AM carrier  : %d.%03d MHz\n",
		       state->second / 910000, (state->second / 910) % 1000);
	if (state->mode == MSP_MODE_FM_TERRA && state->main != state->second) {
		v4l_dbg(1, msp_debug, client, "FM-stereo carrier : %d.%03d MHz\n",
		       state->second / 910000, (state->second / 910) % 1000);
	}
}

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

int autodetect_stereo(struct i2c_client *client)
{
	struct msp_state *state = i2c_get_clientdata(client);
	int val;
	int rxsubchans = state->rxsubchans;
	int newnicam   = state->nicam_on;
	int update = 0;

	switch (state->mode) {
	case MSP_MODE_FM_TERRA:
		val = msp_read_dsp(client, 0x18);
		if (val > 32767)
			val -= 65536;
		v4l_dbg(2, msp_debug, client, "stereo detect register: %d\n", val);
		if (val > 4096) {
			rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO;
		} else if (val < -4096) {
			rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
		} else {
			rxsubchans = V4L2_TUNER_SUB_MONO;
		}
		newnicam = 0;
		break;
	case MSP_MODE_FM_NICAM1:
	case MSP_MODE_FM_NICAM2:
	case MSP_MODE_AM_NICAM:
		val = msp_read_dem(client, 0x23);
		v4l_dbg(2, msp_debug, client, "nicam sync=%d, mode=%d\n",
			val & 1, (val & 0x1e) >> 1);

		if (val & 1) {
			/* nicam synced */
			switch ((val & 0x1e) >> 1)  {
			case 0:
			case 8:
				rxsubchans = V4L2_TUNER_SUB_STEREO;
				break;
			case 1:
			case 9:
				rxsubchans = V4L2_TUNER_SUB_MONO
					| V4L2_TUNER_SUB_LANG1;
				break;
			case 2:
			case 10:
				rxsubchans = V4L2_TUNER_SUB_MONO
					| V4L2_TUNER_SUB_LANG1
					| V4L2_TUNER_SUB_LANG2;
				break;
			default:
				rxsubchans = V4L2_TUNER_SUB_MONO;
				break;
			}
			newnicam = 1;
		} else {
			newnicam = 0;
			rxsubchans = V4L2_TUNER_SUB_MONO;
		}
		break;
	case MSP_MODE_BTSC:
		val = msp_read_dem(client, 0x200);
		v4l_dbg(2, msp_debug, client, "status=0x%x (pri=%s, sec=%s, %s%s%s)\n",
			val,
			(val & 0x0002) ? "no"     : "yes",
			(val & 0x0004) ? "no"     : "yes",
			(val & 0x0040) ? "stereo" : "mono",
			(val & 0x0080) ? ", nicam 2nd mono" : "",
			(val & 0x0100) ? ", bilingual/SAP"  : "");
		rxsubchans = V4L2_TUNER_SUB_MONO;
		if (val & 0x0040) rxsubchans |= V4L2_TUNER_SUB_STEREO;
		if (val & 0x0100) rxsubchans |= V4L2_TUNER_SUB_LANG1;
		break;
	}
	if (rxsubchans != state->rxsubchans) {
		update = 1;
		v4l_dbg(1, msp_debug, client, "watch: rxsubchans %d => %d\n",
			state->rxsubchans,rxsubchans);
		state->rxsubchans = rxsubchans;
	}
	if (newnicam != state->nicam_on) {
		update = 1;
		v4l_dbg(1, msp_debug, client, "watch: nicam %d => %d\n",
			state->nicam_on,newnicam);
		state->nicam_on = newnicam;
	}
	return update;
}

/*
 * A kernel thread for msp3400 control -- we don't want to block the
 * in the ioctl while doing the sound carrier & stereo detect
 */
/* stereo/multilang monitoring */
static void watch_stereo(struct i2c_client *client)
{
	struct msp_state *state = i2c_get_clientdata(client);

	if (autodetect_stereo(client)) {
		if (state->rxsubchans & V4L2_TUNER_SUB_STEREO)
			msp3400c_setstereo(client, V4L2_TUNER_MODE_STEREO);
		else if (state->rxsubchans & V4L2_TUNER_SUB_LANG1)
			msp3400c_setstereo(client, V4L2_TUNER_MODE_LANG1);
		else
			msp3400c_setstereo(client, V4L2_TUNER_MODE_MONO);
	}

	if (msp_once)
		state->watch_stereo = 0;
}

int msp3400c_thread(void *data)
{
	struct i2c_client *client = data;
	struct msp_state *state = i2c_get_clientdata(client);
	struct msp3400c_carrier_detect *cd;
	int count, max1,max2,val1,val2, val,this;


	v4l_dbg(1, msp_debug, client, "msp3400 daemon started\n");
	for (;;) {
		v4l_dbg(2, msp_debug, client, "msp3400 thread: sleep\n");
		msp_sleep(state, -1);
		v4l_dbg(2, msp_debug, client, "msp3400 thread: wakeup\n");

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

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

		/* mute */
		msp_set_mute(client);
		msp3400c_setmode(client, MSP_MODE_AM_DETECT /* +1 */ );
		val1 = val2 = 0;
		max1 = max2 = -1;
		state->watch_stereo = 0;

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

		/* carrier detect pass #1 -- main carrier */
		cd = msp3400c_carrier_detect_main;
		count = ARRAY_SIZE(msp3400c_carrier_detect_main);

		if (msp_amsound && (state->v4l2_std & V4L2_STD_SECAM)) {
			/* autodetect doesn't work well with AM ... */
			max1 = 3;
			count = 0;
			v4l_dbg(1, msp_debug, client, "AM sound override\n");
		}