Radio and radio recording for Samsung YH-920.

There is no simple method to detect radio through the 3-wire interface, so it's
not implemented for the YH-925 for now. YH-920 always has a radio.

Change-Id: Iea484d752915fcd40dbbbd7dbbf13e81aaf548db

2 files changed, 105 insertions, 40 deletions

diff --git a/firmware/drivers/audio/ak4537.c b/firmware/drivers/audio/ak4537.c
index bea3dc7..a42b134 100644
--- a/firmware/drivers/audio/ak4537.c
+++ b/firmware/drivers/audio/ak4537.c
@@ -221,34 +221,64 @@ void audiohw_set_frequency(int fsel)
 }
 
 #if defined(HAVE_RECORDING)
-void audiohw_enable_recording(bool source_mic)
+void audiohw_set_recsrc(int source)
 {
-    if (source_mic)
+    switch(source)
     {
-        /* enable mic power supply */
+    case AUDIO_SRC_PLAYBACK:
+        /* disable mic power supply */
 #if defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
-        /* additionally select external mic */
-        akc_set(AK4537_MIC, MPWRE | MSEL);
+        akc_clear(AK4537_MIC, MPWRE);
 #else
-        akc_set(AK4537_MIC, MPWRI);
+        akc_clear(AK4537_MIC, MPWRI);
 #endif
+        /* power down ADC, mic preamp and line amp */
+        akc_clear(AK4537_PM1, PMADL | PMMICL | PMIPGL);
+        akc_clear(AK4537_PM3, PMADR | PMMICR | PMIPGR);
 
-        /* mic out is connected to line1 input */
-        akc_clear(AK4537_PM3, INL | INR);
+        /* break ADC -> DAC connection */
+        akc_clear(AK4537_MODE2, LOOP);
+
+        break;
+
+#if (INPUT_SRC_CAPS & SRC_CAP_FMRADIO)
+    case AUDIO_SRC_FMRADIO:
+        /* disable mic power supply */
+#if defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
+        akc_clear(AK4537_MIC, MPWRE);
+#else
+        akc_clear(AK4537_MIC, MPWRI);
+#endif
+        /* disable mic preamp */
+        akc_clear(AK4537_PM1, PMMICL);
 
+        /* Select line2 input: Radio */
+        akc_set(AK4537_PM3, INL | INR);
         /* route ALC output to ADC input */
         akc_set(AK4537_MIC, MICAD);
         /* set ALC (automatic level control) to manual mode */
         akc_clear(AK4537_ALC1, ALC1);
-        /* set gain control to 'dependent' (left&right at the same time) */
-        akc_clear(AK4537_MIC, IPGAC);
-        /* power up mic preamp, left channel ADC and line in */
-        akc_set(AK4537_PM1, PMMICL | PMIPGL | PMADL);
-        /* power up right channel ADC and line in */
+
+        /* set gain control to independent left & right gain */
+        akc_set(AK4537_MIC, IPGAC);
+
+        /* power up left channel input and ADC */
+        akc_set(AK4537_PM1, PMADL | PMIPGL);
+        /* power up right channel input and ADC */
         akc_set(AK4537_PM3, PMADR | PMIPGR);
-    }
-    else
-    {
+
+        /* set line in vol = 0 dB */
+        akc_write(AK4537_IPGAL, 0x2f);
+        akc_write(AK4537_IPGAR, 0x2f);
+
+        /* ADC -> DAC, external data to DAC ignored */
+        akc_set(AK4537_MODE2, LOOP);
+
+        break;
+#endif /* INPUT_SRC_CAPS & SRC_CAP_FMRADIO */
+
+#if (INPUT_SRC_CAPS & SRC_CAP_LINEIN)
+    case AUDIO_SRC_LINEIN:
         /* disable mic power supply */
 #if defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
         akc_clear(AK4537_MIC, MPWRE);
@@ -272,25 +302,44 @@ void audiohw_enable_recording(bool source_mic)
         akc_set(AK4537_PM1, PMADL | PMIPGL);
         /* power up right channel input and ADC */
         akc_set(AK4537_PM3, PMADR | PMIPGR);
-    }
-    /* ADC -> DAC, external data to DAC ignored */
-    akc_set(AK4537_MODE2, LOOP);
-}
 
-void audiohw_disable_recording(void)
-{
-    /* disable mic power supply */
+        /* ADC -> DAC, external data to DAC ignored */
+        akc_set(AK4537_MODE2, LOOP);
+
+        break;
+#endif /* INPUT_SRC_CAPS & SRC_CAP_LINEIN */
+
+#if (INPUT_SRC_CAPS & SRC_CAP_MIC)
+    case AUDIO_SRC_MIC:
+        /* enable mic power supply */
 #if defined(SAMSUNG_YH920) || defined(SAMSUNG_YH925)
-        akc_clear(AK4537_MIC, MPWRE);
+        /* additionally select external mic */
+        akc_set(AK4537_MIC, MPWRE | MSEL);
 #else
-        akc_clear(AK4537_MIC, MPWRI);
+        akc_set(AK4537_MIC, MPWRI);
 #endif
-    /* power down ADC, mic preamp and line amp */
-    akc_clear(AK4537_PM1, PMADL | PMMICL | PMIPGL);
-    akc_clear(AK4537_PM3, PMADR | PMMICR | PMIPGR);
 
-    /* break ADC -> DAC connection */
-    akc_clear(AK4537_MODE2, LOOP);
+        /* mic out is connected to line1 input */
+        akc_clear(AK4537_PM3, INL | INR);
+
+        /* route ALC output to ADC input */
+        akc_set(AK4537_MIC, MICAD);
+        /* set ALC (automatic level control) to manual mode */
+        akc_clear(AK4537_ALC1, ALC1);
+        /* set gain control to 'dependent' (left&right at the same time) */
+        akc_clear(AK4537_MIC, IPGAC);
+        /* power up mic preamp, left channel ADC and line in */
+        akc_set(AK4537_PM1, PMMICL | PMIPGL | PMADL);
+        /* power up right channel ADC and line in */
+        akc_set(AK4537_PM3, PMADR | PMIPGR);
+
+        /* ADC -> DAC, external data to DAC ignored */
+        akc_set(AK4537_MODE2, LOOP);
+
+        break;
+#endif /* INPUT_SRC_CAPS & SRC_CAP_MIC) */
+
+    } /* switch(source) */
 }
 
 void audiohw_set_recvol(int left, int right, int type)
@@ -331,9 +380,4 @@ void audiohw_set_recvol(int left, int right, int type)
         return;
     }
 }
-
-void audiohw_set_monitor(bool enable)
-{
-    (void)enable;
-}
 #endif /* HAVE_RECORDING */
diff --git a/firmware/drivers/tuner/tea5767.c b/firmware/drivers/tuner/tea5767.c
index d0041f9..74adb54 100644
--- a/firmware/drivers/tuner/tea5767.c
+++ b/firmware/drivers/tuner/tea5767.c
@@ -27,7 +27,9 @@
 #include "power.h"
 #include "tuner.h" /* tuner abstraction interface */
 #include "fmradio.h"
-#include "fmradio_i2c.h" /* physical interface driver */
+#include "fmradio_i2c.h"   /* physical interface driver - i2c */
+#include "fmradio_3wire.h" /* physical interface driver - 3-wire bus */
+
 
 #if defined(PHILIPS_HDD1630) || defined(ONDA_VX747) || defined(ONDA_VX777) || defined(PHILIPS_HDD6330)
 #define I2C_ADR 0x60
@@ -109,7 +111,11 @@ int tea5767_set(int setting, int value)
 
     if(setting == RADIO_SLEEP && !value)
         tuner_power(true); /* wakeup */
+#if defined(CONFIG_TUNER_3WIRE)
+    fmradio_3wire_write(write_bytes);
+#else
     fmradio_i2c_write(I2C_ADR, write_bytes, sizeof(write_bytes));
+#endif
     if(setting == RADIO_SLEEP && value)
         tuner_power(false); /* sleep */
     return 1;
@@ -121,7 +127,11 @@ int tea5767_get(int setting)
     unsigned char read_bytes[5];
     int val = -1; /* default for unsupported query */
 
+#if defined(CONFIG_TUNER_3WIRE)
+    fmradio_3wire_read(read_bytes);
+#else
     fmradio_i2c_read(I2C_ADR, read_bytes, sizeof(read_bytes));
+#endif
 
     switch(setting)
     {
@@ -141,7 +151,7 @@ int tea5767_get(int setting)
         case RADIO_STEREO:
             val = read_bytes[2] >> 7;
             break;
-        
+
         case RADIO_RSSI:
             val = 10 + 3*(read_bytes[3] >> 4);
             break;
@@ -161,15 +171,22 @@ int tea5767_get(int setting)
 void tea5767_init(void)
 {
 /* save binsize by only detecting presence for targets where it may be absent */
-#if defined(PHILIPS_HDD1630) || defined(PHILIPS_HDD6330)
+#if defined(PHILIPS_HDD1630) || defined(PHILIPS_HDD6330) || defined(SAMSUNG_YH920)
     unsigned char buf[5];
     unsigned char chipid;
 
     /* init chipid register with 0xFF in case fmradio_i2c_read fails silently */
     buf[3] = 0xFF;
     tuner_power(true);
-    if (fmradio_i2c_read(I2C_ADR, buf, sizeof(buf)) < 0) {
-        /* no i2c device detected */
+
+#if defined(CONFIG_TUNER_3WIRE)
+    int res = fmradio_3wire_read(buf);
+#else
+    int res = fmradio_i2c_read(I2C_ADR, buf, sizeof(buf));
+#endif
+
+    if (res < 0) {
+        /* no device detected on bus */
         tuner_present = false;
     } else {
         /* check chip id */
@@ -182,6 +199,10 @@ void tea5767_init(void)
 
 void tea5767_dbg_info(struct tea5767_dbg_info *info)
 {
+#if defined(CONFIG_TUNER_3WIRE)
+    fmradio_3wire_read(info->read_regs);
+#else
     fmradio_i2c_read(I2C_ADR, info->read_regs, 5);
+#endif
     memcpy(info->write_regs, write_bytes, 5);
 }