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>

6 files changed, 83 insertions, 1 deletions

diff --git a/sound/pci/pcxhr/pcxhr.c b/sound/pci/pcxhr/pcxhr.c
index 0435f45e9513..e3ac1f768ff6 100644
--- a/sound/pci/pcxhr/pcxhr.c
+++ b/sound/pci/pcxhr/pcxhr.c
@@ -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 */
 
diff --git a/sound/pci/pcxhr/pcxhr.h b/sound/pci/pcxhr/pcxhr.h
index bda776c49884..a4c602c45173 100644
--- a/sound/pci/pcxhr/pcxhr.h
+++ b/sound/pci/pcxhr/pcxhr.h
@@ -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;
 
diff --git a/sound/pci/pcxhr/pcxhr_core.c b/sound/pci/pcxhr/pcxhr_core.c
index 841703b5c52a..b33db1e006e7 100644
--- a/sound/pci/pcxhr/pcxhr_core.c
+++ b/sound/pci/pcxhr/pcxhr_core.c
@@ -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
 
diff --git a/sound/pci/pcxhr/pcxhr_core.h b/sound/pci/pcxhr/pcxhr_core.h
index be0173796cdb..a81ab6b811e7 100644
--- a/sound/pci/pcxhr/pcxhr_core.h
+++ b/sound/pci/pcxhr/pcxhr_core.h
@@ -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 */
diff --git a/sound/pci/pcxhr/pcxhr_mix22.c b/sound/pci/pcxhr/pcxhr_mix22.c
index 1cb82c0a9cb3..84fe57626eba 100644
--- a/sound/pci/pcxhr/pcxhr_mix22.c
+++ b/sound/pci/pcxhr/pcxhr_mix22.c
@@ -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)
diff --git a/sound/pci/pcxhr/pcxhr_mix22.h b/sound/pci/pcxhr/pcxhr_mix22.h
index 5a37a0007e8f..5971b9933f41 100644
--- a/sound/pci/pcxhr/pcxhr_mix22.h
+++ b/sound/pci/pcxhr/pcxhr_mix22.h
@@ -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 */