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

9 files changed, 307 insertions, 42 deletions

diff --git a/firmware/SOURCES b/firmware/SOURCES
index 374210e30b..ef71a2b048 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -1705,6 +1705,7 @@ target/arm/samsung/yh920/backlight-yh920.c
 target/arm/samsung/yh920/lcd-yh920.c
 target/arm/samsung/yh920/lcd-as-yh920.S
 target/arm/samsung/yh920/powermgmt-yh920.c
+target/arm/samsung/fmradio-yh92x.c
 #endif /* SAMSUNG_YH920 */
 
 #ifdef SAMSUNG_YH925
diff --git a/firmware/drivers/audio/ak4537.c b/firmware/drivers/audio/ak4537.c
index bea3dc7019..a42b1346d2 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 d0041f9ce1..74adb54997 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);
 }
diff --git a/firmware/export/ak4537.h b/firmware/export/ak4537.h
index 1c09b5aa2f..0ab0ca1594 100644
--- a/firmware/export/ak4537.h
+++ b/firmware/export/ak4537.h
@@ -34,6 +34,8 @@ AUDIOHW_SETTING(RIGHT_GAIN, "dB", 0,  1, -23, 12, 0)
 /* mic gain: +15dB fixed +20dB switchable mic preamp gain
    and the line stage of -23..+12dB make a total range of -8..+47dB */
 AUDIOHW_SETTING(MIC_GAIN,   "dB", 0,  1,   -8,   47,   20)
+
+void audiohw_set_recsrc(int source);
 #endif /* HAVE_RECORDING */
 
 #define AKC_NUM_REGS        0x11
diff --git a/firmware/export/config/samsungyh920.h b/firmware/export/config/samsungyh920.h
index 7d6d590d96..d40a065e00 100644
--- a/firmware/export/config/samsungyh920.h
+++ b/firmware/export/config/samsungyh920.h
@@ -11,7 +11,7 @@
 
 /* Define bitmask of input sources - recordable bitmask can be defined
    explicitly if different */
-#define INPUT_SRC_CAPS (SRC_CAP_MIC | SRC_CAP_LINEIN )
+#define INPUT_SRC_CAPS (SRC_CAP_MIC | SRC_CAP_LINEIN | SRC_CAP_FMRADIO)
 
 /* define the bitmask of hardware sample rates */
 #define HW_SAMPR_CAPS   (SAMPR_CAP_48 | SAMPR_CAP_44 | SAMPR_CAP_32 | \
@@ -133,6 +133,12 @@
 /* AK4537 has no tone controls, so we use the software ones */
 #define HAVE_SW_TONE_CONTROLS
 
+/* FM Tuner */
+#define CONFIG_TUNER      TEA5767
+#define CONFIG_TUNER_XTAL 32768
+/* Define this if the tuner uses 3-wire bus instead of classic i2c */
+#define CONFIG_TUNER_3WIRE
+
 #define AB_REPEAT_ENABLE
 
 #define BATTERY_CAPACITY_DEFAULT 1550 /* default battery capacity */
diff --git a/firmware/export/fmradio_3wire.h b/firmware/export/fmradio_3wire.h
new file mode 100644
index 0000000000..cafce9c8ec
--- /dev/null
+++ b/firmware/export/fmradio_3wire.h
@@ -0,0 +1,33 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ * Physical interface of the Philips TEA5767
+ *
+ * Copyright (C) 2014 by Szymon Dziok
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef FMRADIO_TRIWIRE_H
+#define FMRADIO_TRIWIRE_H
+
+#include "config.h" /* for INIT_ATTR */
+#include <stdbool.h>
+
+void fmradio_3wire_init(void) INIT_ATTR;
+void fmradio_3wire_enable(bool enable);
+int fmradio_3wire_write(const unsigned char* buf);
+int fmradio_3wire_read(unsigned char* buf);
+
+#endif
diff --git a/firmware/target/arm/pp/audio-pp.c b/firmware/target/arm/pp/audio-pp.c
index 6b5b082cc7..76740f2e42 100644
--- a/firmware/target/arm/pp/audio-pp.c
+++ b/firmware/target/arm/pp/audio-pp.c
@@ -30,6 +30,25 @@ void audio_set_output_source(int source)
         source = AUDIO_SRC_PLAYBACK;
 } /* audio_set_output_source */
 
+#ifdef HAVE_AK4537
+void audio_input_mux(int source, unsigned flags)
+{
+    (void)flags;
+    /* Prevent pops from unneeded switching */
+    static int last_source = AUDIO_SRC_PLAYBACK;
+
+#ifdef HAVE_FMRADIO_REC
+    bool recording = flags & SRCF_RECORDING;
+
+    if ((source == AUDIO_SRC_FMRADIO) && (!recording))
+        audiohw_set_recvol(0, 0, AUDIO_GAIN_LINEIN); /* Set line-in vol to 0dB*/
+#endif
+    if (source != last_source)
+        audiohw_set_recsrc(source);
+
+    last_source = source;
+}
+#else
 void audio_input_mux(int source, unsigned flags)
 {
     (void)flags;
@@ -132,4 +151,6 @@ void audio_input_mux(int source, unsigned flags)
 
     last_source = source;
 } /* audio_input_mux */
+#endif
+
 #endif /* INPUT_SRC_CAPS != 0 */
diff --git a/firmware/target/arm/samsung/fmradio-yh92x.c b/firmware/target/arm/samsung/fmradio-yh92x.c
new file mode 100644
index 0000000000..4637aca287
--- /dev/null
+++ b/firmware/target/arm/samsung/fmradio-yh92x.c
@@ -0,0 +1,120 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ * Physical interface of the Philips TEA5767 in Samsung YH-92x
+ *
+ * Copyright (C) 2014 by Szymon Dziok
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include "system.h"
+#include "cpu.h"
+#include "fmradio_3wire.h"
+
+#define CLOCK_EN      GPIO_SET_BITWISE(GPIOL_ENABLE, 0x10)
+#define CLOCK_OUT     GPIO_SET_BITWISE(GPIOL_OUTPUT_EN, 0x10)
+#define CLOCK_LO      GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_VAL, 0x10)
+#define CLOCK_HI      GPIO_SET_BITWISE(GPIOL_OUTPUT_VAL, 0x10)
+
+#define DATA          (GPIOL_INPUT_VAL & 0x08)
+#define DATA_EN       GPIO_SET_BITWISE(GPIOL_ENABLE, 0x08)
+#define DATA_IN       GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_EN, 0x08)
+#define DATA_OUT      GPIO_SET_BITWISE(GPIOL_OUTPUT_EN, 0x08)
+#define DATA_LO       GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_VAL, 0x08)
+#define DATA_HI       GPIO_SET_BITWISE(GPIOL_OUTPUT_VAL, 0x08)
+
+#define READWRITE_EN  GPIO_SET_BITWISE(GPIOL_ENABLE, 0x01)
+#define READWRITE_OUT GPIO_SET_BITWISE(GPIOL_OUTPUT_EN, 0x01)
+#define READWRITE_LO  GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_VAL, 0x01)
+#define READWRITE_HI  GPIO_SET_BITWISE(GPIOL_OUTPUT_VAL, 0x01)
+
+#define DELAY1   udelay(1)
+#define DELAY2   udelay(2)
+
+void fmradio_3wire_init(void)
+{
+    READWRITE_EN;
+    READWRITE_OUT;
+
+    DATA_EN;
+    DATA_IN;
+
+    CLOCK_EN;
+    CLOCK_HI;
+    CLOCK_OUT;
+
+    DELAY2;
+}
+
+int fmradio_3wire_write(const unsigned char* buf)
+{
+    int i, j;
+
+    CLOCK_LO;
+    READWRITE_LO;
+    DELAY2;
+    READWRITE_HI;
+    DELAY1;
+    DATA_OUT;
+
+    /* 5 bytes to the tuner */
+    for (j = 0; j < 5; j++)
+    {
+        for (i = 7; i >= 0; i--)
+        {
+            if ((buf[j] >> i) & 0x1) DATA_HI;
+                else DATA_LO;
+            DELAY1;
+            CLOCK_HI;
+            DELAY2;
+            CLOCK_LO;
+            DELAY1;
+        }
+    }
+    READWRITE_LO;
+
+    return j;
+}
+
+int fmradio_3wire_read(unsigned char* buf)
+{
+    int i, j;
+
+    CLOCK_LO;
+    READWRITE_HI;
+    DELAY2;
+    READWRITE_LO;
+    DELAY2;
+    DATA_IN;
+
+    /* 5 bytes from the tuner */
+    for (j = 0; j < 5; j++)
+    {
+        buf[j] = 0;
+        for (i = 7; i >= 0; i--)
+        {
+            buf[j] |= ((DATA >> 3) << i);
+
+            CLOCK_HI;
+            DELAY2;
+            CLOCK_LO;
+            DELAY2;
+        }
+    }
+    READWRITE_HI;
+
+    return j;
+}
diff --git a/firmware/target/arm/samsung/power-yh82x_yh92x.c b/firmware/target/arm/samsung/power-yh82x_yh92x.c
index 021ddade4d..b6c18c5fd0 100644
--- a/firmware/target/arm/samsung/power-yh82x_yh92x.c
+++ b/firmware/target/arm/samsung/power-yh82x_yh92x.c
@@ -20,7 +20,7 @@
  ****************************************************************************/
 
 /* Created from power.c using some iPod code, and some custom stuff based on 
-   GPIO analysis 
+   GPIO analysis
 */
 
 #include "config.h"
@@ -32,9 +32,26 @@
 #include "power.h"
 #include "logf.h"
 #include "usb.h"
+#include "fmradio_3wire.h"
+
+#if CONFIG_TUNER
+bool tuner_power(bool status)
+{
+    GPIO_SET_BITWISE(GPIOL_ENABLE, 0x04);
+    GPIO_SET_BITWISE(GPIOL_OUTPUT_EN, 0x04);
+    if (status)
+        GPIO_CLEAR_BITWISE(GPIOL_OUTPUT_VAL, 0x04);
+    else
+        GPIO_SET_BITWISE(GPIOL_OUTPUT_VAL, 0x04);
+    return status;
+}
+#endif
 
 void power_init(void)
 {
+#if CONFIG_TUNER
+    fmradio_3wire_init();
+#endif
 }
 
 unsigned int power_input_status(void)