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ALSA: pcxhr: Add LTC support 

add LTC (linear timecode) read function via proc interface to the pcxhr driver

Signed-off-by: Markus Bollinger <bollinger@digigram.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Markus Bollinger 2012-06-20 08:34:40 +02:00 committed by Takashi Iwai
parent d7dc9e32ae
commit fdfbaf69e0
6 changed files with 83 additions and 1 deletions
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63
sound/pci/pcxhr/pcxhr.c
View File

@ -1368,6 +1368,67 @@ static void pcxhr_proc_gpo_write(struct snd_info_entry *entry,
}
}
/* Access to the results of the CMD_GET_TIME_CODE RMH */
#define TIME_CODE_VALID_MASK 0x00800000
#define TIME_CODE_NEW_MASK 0x00400000
#define TIME_CODE_BACK_MASK 0x00200000
#define TIME_CODE_WAIT_MASK 0x00100000
/* Values for the CMD_MANAGE_SIGNAL RMH */
#define MANAGE_SIGNAL_TIME_CODE 0x01
#define MANAGE_SIGNAL_MIDI 0x02
/* linear time code read proc*/
static void pcxhr_proc_ltc(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct snd_pcxhr *chip = entry->private_data;
struct pcxhr_mgr *mgr = chip->mgr;
struct pcxhr_rmh rmh;
unsigned int ltcHrs, ltcMin, ltcSec, ltcFrm;
int err;
/* commands available when embedded DSP is running */
if (!(mgr->dsp_loaded & (1 << PCXHR_FIRMWARE_DSP_MAIN_INDEX))) {
snd_iprintf(buffer, "no firmware loaded\n");
return;
}
if (!mgr->capture_ltc) {
pcxhr_init_rmh(&rmh, CMD_MANAGE_SIGNAL);
rmh.cmd[0] |= MANAGE_SIGNAL_TIME_CODE;
err = pcxhr_send_msg(mgr, &rmh);
if (err) {
snd_iprintf(buffer, "ltc not activated (%d)\n", err);
return;
}
if (mgr->is_hr_stereo)
hr222_manage_timecode(mgr, 1);
else
pcxhr_write_io_num_reg_cont(mgr, REG_CONT_VALSMPTE,
REG_CONT_VALSMPTE, NULL);
mgr->capture_ltc = 1;
}
pcxhr_init_rmh(&rmh, CMD_GET_TIME_CODE);
err = pcxhr_send_msg(mgr, &rmh);
if (err) {
snd_iprintf(buffer, "ltc read error (err=%d)\n", err);
return ;
}
ltcHrs = 10*((rmh.stat[0] >> 8) & 0x3) + (rmh.stat[0] & 0xf);
ltcMin = 10*((rmh.stat[1] >> 16) & 0x7) + ((rmh.stat[1] >> 8) & 0xf);
ltcSec = 10*(rmh.stat[1] & 0x7) + ((rmh.stat[2] >> 16) & 0xf);
ltcFrm = 10*((rmh.stat[2] >> 8) & 0x3) + (rmh.stat[2] & 0xf);
snd_iprintf(buffer, "timecode: %02u:%02u:%02u-%02u\n",
ltcHrs, ltcMin, ltcSec, ltcFrm);
snd_iprintf(buffer, "raw: 0x%04x%06x%06x\n", rmh.stat[0] & 0x00ffff,
rmh.stat[1] & 0xffffff, rmh.stat[2] & 0xffffff);
/*snd_iprintf(buffer, "dsp ref time: 0x%06x%06x\n",
rmh.stat[3] & 0xffffff, rmh.stat[4] & 0xffffff);*/
if (!(rmh.stat[0] & TIME_CODE_VALID_MASK)) {
snd_iprintf(buffer, "warning: linear timecode not valid\n");
}
}
static void __devinit pcxhr_proc_init(struct snd_pcxhr *chip)
{
struct snd_info_entry *entry;
@ -1383,6 +1444,8 @@ static void __devinit pcxhr_proc_init(struct snd_pcxhr *chip)
entry->c.text.write = pcxhr_proc_gpo_write;
entry->mode |= S_IWUSR;
}
if (!snd_card_proc_new(chip->card, "ltc", &entry))
snd_info_set_text_ops(entry, chip, pcxhr_proc_ltc);
}
/* end of proc interface */

1
sound/pci/pcxhr/pcxhr.h
View File

@ -103,6 +103,7 @@ struct pcxhr_mgr {
unsigned int board_has_mic:1; /* if 1 the board has microphone input */
unsigned int board_aes_in_192k:1;/* if 1 the aes input plugs do support 192kHz */
unsigned int mono_capture:1; /* if 1 the board does mono capture */
unsigned int capture_ltc:1; /* if 1 the board captures LTC input */
struct snd_dma_buffer hostport;

4
sound/pci/pcxhr/pcxhr_core.c
View File

@ -504,6 +504,8 @@ static struct pcxhr_cmd_info pcxhr_dsp_cmds[] = {
[CMD_FORMAT_STREAM_IN] = { 0x870000, 0, RMH_SSIZE_FIXED },
[CMD_STREAM_SAMPLE_COUNT] = { 0x902000, 2, RMH_SSIZE_FIXED },
[CMD_AUDIO_LEVEL_ADJUST] = { 0xc22000, 0, RMH_SSIZE_FIXED },
[CMD_GET_TIME_CODE] = { 0x060000, 5, RMH_SSIZE_FIXED },
[CMD_MANAGE_SIGNAL] = { 0x0f0000, 0, RMH_SSIZE_FIXED },
};
#ifdef CONFIG_SND_DEBUG_VERBOSE
@ -533,6 +535,8 @@ static char* cmd_names[] = {
[CMD_FORMAT_STREAM_IN] = "CMD_FORMAT_STREAM_IN",
[CMD_STREAM_SAMPLE_COUNT] = "CMD_STREAM_SAMPLE_COUNT",
[CMD_AUDIO_LEVEL_ADJUST] = "CMD_AUDIO_LEVEL_ADJUST",
[CMD_GET_TIME_CODE] = "CMD_GET_TIME_CODE",
[CMD_MANAGE_SIGNAL] = "CMD_MANAGE_SIGNAL",
};
#endif

4
sound/pci/pcxhr/pcxhr_core.h
View File

@ -79,6 +79,8 @@ enum {
CMD_FORMAT_STREAM_IN, /* cmd_len >= 4 stat_len = 0 */
CMD_STREAM_SAMPLE_COUNT, /* cmd_len = 2 stat_len = (2 * nb_stream) */
CMD_AUDIO_LEVEL_ADJUST, /* cmd_len = 3 stat_len = 0 */
CMD_GET_TIME_CODE, /* cmd_len = 1 stat_len = 5 */
CMD_MANAGE_SIGNAL, /* cmd_len = 1 stat_len = 0 */
CMD_LAST_INDEX
};
@ -116,7 +118,7 @@ int pcxhr_send_msg(struct pcxhr_mgr *mgr, struct pcxhr_rmh *rmh);
#define IO_NUM_REG_OUT_ANA_LEVEL 20
#define IO_NUM_REG_IN_ANA_LEVEL 21
#define REG_CONT_VALSMPTE 0x000800
#define REG_CONT_UNMUTE_INPUTS 0x020000
/* parameters used with register IO_NUM_REG_STATUS */

11
sound/pci/pcxhr/pcxhr_mix22.c
View File

@ -53,6 +53,7 @@
#define PCXHR_DSP_RESET_DSP 0x01
#define PCXHR_DSP_RESET_MUTE 0x02
#define PCXHR_DSP_RESET_CODEC 0x08
#define PCXHR_DSP_RESET_SMPTE 0x10
#define PCXHR_DSP_RESET_GPO_OFFSET 5
#define PCXHR_DSP_RESET_GPO_MASK 0x60
@ -527,6 +528,16 @@ int hr222_write_gpo(struct pcxhr_mgr *mgr, int value)
return 0;
}
int hr222_manage_timecode(struct pcxhr_mgr *mgr, int enable)
{
if (enable)
mgr->dsp_reset |= PCXHR_DSP_RESET_SMPTE;
else
mgr->dsp_reset &= ~PCXHR_DSP_RESET_SMPTE;
PCXHR_OUTPB(mgr, PCXHR_DSP_RESET, mgr->dsp_reset);
return 0;
}
int hr222_update_analog_audio_level(struct snd_pcxhr *chip,
int is_capture, int channel)

1
sound/pci/pcxhr/pcxhr_mix22.h
View File

@ -34,6 +34,7 @@ int hr222_get_external_clock(struct pcxhr_mgr *mgr,
int hr222_read_gpio(struct pcxhr_mgr *mgr, int is_gpi, int *value);
int hr222_write_gpo(struct pcxhr_mgr *mgr, int value);
int hr222_manage_timecode(struct pcxhr_mgr *mgr, int enable);
#define HR222_LINE_PLAYBACK_LEVEL_MIN 0 /* -25.5 dB */
#define HR222_LINE_PLAYBACK_ZERO_LEVEL 51 /* 0.0 dB */