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linux-next/drivers/media/video/msp3400-kthreads.c
Hans Verkuil 8a4b275f9c V4L/DVB (3427): audmode and rxsubchans fixes (VIDIOC_G/S_TUNER) 
- Audmode and rxsubchans fixes in msp3400, tuner, tvaudio and cx25840.
- msp3400 cleanups

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-01-23 17:11:09 -02:00

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/*
* Programming the mspx4xx sound processor family
*
* (c) 1997-2001 Gerd Knorr <kraxel@bytesex.org>
*
* 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, 0x7c00
},
};
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 msp_set_source(struct i2c_client *client, u16 src)
{
struct msp_state *state = i2c_get_clientdata(client);
if (msp_dolby) {
msp_write_dsp(client, 0x0008, 0x0520); /* I2S1 */
msp_write_dsp(client, 0x0009, 0x0620); /* I2S2 */
} 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);
}
void msp3400c_set_carrier(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_set_mode(struct i2c_client *client, int mode)
{
struct msp_state *state = i2c_get_clientdata(client);
struct msp3400c_init_data_dem *data = &msp3400c_init_data[mode];
int i;
v4l_dbg(1, msp_debug, client, "set_mode: %d\n", mode);
state->mode = mode;
state->rxsubchans = V4L2_TUNER_SUB_MONO;
msp_write_dem(client, 0x00bb, data->ad_cv);
for (i = 5; i >= 0; i--) /* fir 1 */
msp_write_dem(client, 0x0001, data->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, data->fir2[i]);
msp_write_dem(client, 0x0083, data->mode_reg);
msp3400c_set_carrier(client, data->cdo1, data->cdo2);
msp_set_source(client, data->dsp_src);
msp_write_dsp(client, 0x000e, data->dsp_matrix);
if (state->has_nicam) {
/* nicam prescale */
msp_write_dsp(client, 0x0010, 0x5a00); /* was: 0x3000 */
}
}
/* Set audio mode. Note that the pre-'G' models do not support BTSC+SAP,
nor do they support stereo BTSC. */
void msp3400c_set_audmode(struct i2c_client *client)
{
static char *strmode[] = { "mono", "stereo", "lang2", "lang1" };
struct msp_state *state = i2c_get_clientdata(client);
char *modestr = (state->audmode >= 0 && state->audmode < 4) ?
strmode[state->audmode] : "unknown";
int src = 0; /* channel source: FM/AM, nicam or SCART */
if (state->opmode == OPMODE_AUTOSELECT) {
/* this method would break everything, let's make sure
* it's never called
*/
v4l_dbg(1, msp_debug, client,
"set_audmode called with mode=%d instead of set_source (ignored)\n",
state->audmode);
return;
}
/* switch demodulator */
switch (state->mode) {
case MSP_MODE_FM_TERRA:
v4l_dbg(1, msp_debug, client, "FM set_audmode: %s\n", modestr);
switch (state->audmode) {
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 set_audmode: %s\n", modestr);
switch (state->audmode) {
case V4L2_TUNER_MODE_MONO:
msp3400c_set_carrier(client, MSP_CARRIER(6.5), MSP_CARRIER(6.5));
break;
case V4L2_TUNER_MODE_STEREO:
msp3400c_set_carrier(client, MSP_CARRIER(7.2), MSP_CARRIER(7.02));
break;
case V4L2_TUNER_MODE_LANG1:
msp3400c_set_carrier(client, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
break;
case V4L2_TUNER_MODE_LANG2:
msp3400c_set_carrier(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 set_audmode: %s\n",modestr);
msp3400c_set_carrier(client, state->second, state->main);
if (state->nicam_on)
src = 0x0100; /* NICAM */
break;
case MSP_MODE_BTSC:
v4l_dbg(1, msp_debug, client, "BTSC set_audmode: %s\n",modestr);
break;
case MSP_MODE_EXTERN:
v4l_dbg(1, msp_debug, client, "extern set_audmode: %s\n",modestr);
src = 0x0200; /* SCART */
break;
case MSP_MODE_FM_RADIO:
v4l_dbg(1, msp_debug, client, "FM-Radio set_audmode: %s\n",modestr);
break;
default:
v4l_dbg(1, msp_debug, client, "mono set_audmode\n");
return;
}
/* switch audio */
switch (state->audmode) {
case V4L2_TUNER_MODE_STEREO:
src |= 0x0020;
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;
}
if (state->rxsubchans & V4L2_TUNER_SUB_STEREO)
src = 0x0030;
break;
case V4L2_TUNER_MODE_LANG1:
/* switch to stereo for stereo transmission, otherwise
keep first language */
if (state->rxsubchans & V4L2_TUNER_SUB_STEREO)
src |= 0x0020;
break;
case V4L2_TUNER_MODE_LANG2:
src |= 0x0010;
break;
}
v4l_dbg(1, msp_debug, client, "set_audmode final source/matrix = 0x%x\n", src);
msp_set_source(client, 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);
}
}
/* ----------------------------------------------------------------------- */
static int msp3400c_detect_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;
} 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;
break;
case 2:
case 10:
rxsubchans = 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;
}
if (rxsubchans != state->rxsubchans) {
update = 1;
v4l_dbg(1, msp_debug, client, "watch: rxsubchans %02x => %02x\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 (msp3400c_detect_stereo(client)) {
msp3400c_set_audmode(client);
}
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(2, 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_set_mode(client, MSP_MODE_AM_DETECT /* +1 */ );
val1 = val2 = 0;
max1 = max2 = -1;
state->watch_stereo = 0;
state->nicam_on = 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");
}
for (this = 0; this < count; this++) {
msp3400c_set_carrier(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_set_carrier(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_set_mode(client, MSP_MODE_FM_TERRA);
state->watch_stereo = 1;
} else if (max2 == 1 && state->has_nicam) {
/* B/G NICAM */
state->second = msp3400c_carrier_detect_55[max2].cdo;
msp3400c_set_mode(client, MSP_MODE_FM_NICAM1);
msp3400c_set_carrier(client, state->second, state->main);
state->nicam_on = 1;
state->watch_stereo = 1;
} else {
goto no_second;
}
break;
case 2: /* 6.0 */
/* PAL I NICAM */
state->second = MSP_CARRIER(6.552);
msp3400c_set_mode(client, MSP_MODE_FM_NICAM2);
msp3400c_set_carrier(client, state->second, state->main);
state->nicam_on = 1;
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_set_mode(client, MSP_MODE_FM_TERRA);
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_set_mode(client, MSP_MODE_AM_NICAM);
msp3400c_set_carrier(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_set_mode(client, MSP_MODE_FM_NICAM1);
msp3400c_set_carrier(client, state->second, state->main);
state->nicam_on = 1;
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_set_mode(client, MSP_MODE_FM_TERRA);
msp3400c_set_carrier(client, state->second, state->main);
state->rxsubchans = V4L2_TUNER_SUB_MONO;
break;
}
/* unmute */
msp_set_audio(client);
msp3400c_set_audmode(client);
if (msp_debug)
msp3400c_print_mode(client);
/* monitor tv audio mode, the first time don't wait
so long to get a quick stereo/bilingual result */
if (msp_sleep(state, 1000))
goto restart;
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(2, 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;
state->nicam_on = 0;
if (msp_debug)
v4l_dbg(2, 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(2, 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;
break;
case 0x0009:
state->mode = MSP_MODE_AM_NICAM;
state->rxsubchans = V4L2_TUNER_SUB_MONO;
state->nicam_on = 1;
state->watch_stereo = 1;
break;
case 0x0020: /* BTSC */
/* The pre-'G' models only have BTSC-mono */
state->mode = MSP_MODE_BTSC;
state->rxsubchans = V4L2_TUNER_SUB_MONO;
break;
case 0x0040: /* FM radio */
state->mode = MSP_MODE_FM_RADIO;
state->rxsubchans = V4L2_TUNER_SUB_STEREO;
/* not needed in theory if we have radio, but
short programming enables carrier mute */
msp3400c_set_mode(client, MSP_MODE_FM_RADIO);
msp3400c_set_carrier(client, MSP_CARRIER(10.7),
MSP_CARRIER(10.7));
/* scart routing (this doesn't belong here I think) */
msp_set_scart(client,SCART_IN2,0);
break;
case 0x0003:
case 0x0004:
case 0x0005:
state->mode = MSP_MODE_FM_TERRA;
state->rxsubchans = V4L2_TUNER_SUB_MONO;
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);
msp3400c_set_audmode(client);
/* monitor tv audio mode, the first time don't wait
so long to get a quick stereo/bilingual result */
if (msp_sleep(state, 1000))
goto restart;
while (state->watch_stereo) {
watch_stereo(client);
if (msp_sleep(state, 5000))
goto restart;
}
}
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_set_audmode
*/
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);
msp_set_source(client, 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;
if (state->has_i2s_conf)
msp_write_dem(client, 0x40, state->i2s_mode);
}
v4l_dbg(1, msp_debug, client, "thread: exit\n");
return 0;
}
static 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)
{
struct msp_state *state = i2c_get_clientdata(client);
int source;
switch (state->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:
source = 1;
break;
}
msp34xxg_set_source(client, source);
}
void msp_set_audmode(struct i2c_client *client)
{
struct msp_state *state = i2c_get_clientdata(client);
switch (state->opmode) {
case OPMODE_MANUAL:
case OPMODE_AUTODETECT:
state->watch_stereo = 0;
msp3400c_set_audmode(client);
break;
case OPMODE_AUTOSELECT:
msp34xxg_set_audmode(client);
break;
}
}
void msp_detect_stereo(struct i2c_client *client)
{
struct msp_state *state = i2c_get_clientdata(client);
switch (state->opmode) {
case OPMODE_MANUAL:
case OPMODE_AUTODETECT:
msp3400c_detect_stereo(client);
break;
case OPMODE_AUTOSELECT:
msp34xxg_detect_stereo(client);
break;
}
}
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