From 14e80671afca494b26354753c8fddc3c3a787d4c Mon Sep 17 00:00:00 2001
From: Christian Gmeiner <christian.gmeiner@gmail.com>
Date: Sat, 6 Aug 2005 10:12:19 +0000
Subject: iAudio: First unfinished attempt for tlv320 driver and rockbox
 integration

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7286 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/drivers/tlv320.c | 223 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 223 insertions(+)
 create mode 100644 firmware/drivers/tlv320.c

(limited to 'firmware/drivers')

diff --git a/firmware/drivers/tlv320.c b/firmware/drivers/tlv320.c
new file mode 100644
index 0000000..bafd77c
--- /dev/null
+++ b/firmware/drivers/tlv320.c
@@ -0,0 +1,223 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 by Christian Gmeiner
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "lcd.h"
+#include "cpu.h"
+#include "kernel.h"
+#include "thread.h"
+#include "power.h"
+#include "debug.h"
+#include "system.h"
+#include "sprintf.h"
+#include "button.h"
+#include "string.h"
+#include "file.h"
+#include "buffer.h"
+
+#include "i2c-coldfire.h"
+#include "tlv320.h"
+
+/* local functions and definations */
+#define TLV320_ADDR 0x34
+
+struct tlv320_info
+{
+    int vol_l;
+    int vol_r;
+} tlv320;
+
+/* Definition of a playback configuration to start with */
+#define NUM_DEFAULT_REGS 10
+unsigned tlv320_defaults[2*NUM_DEFAULT_REGS] =
+{
+    REG_PC,         PC_ON | PC_OSC | PC_CLK | PC_DAC | ~PC_OUT,     /* do we need to enable osciliator and clock? */
+    REG_LLIV,       LLIV_LIM,                                       /* mute adc input */
+    REG_RLIV,       RLIV_RIM,                                       /* mute adc input */
+    REG_LHV,        LHV_LHV(HEADPHONE_MUTE),                        /* mute headphone */
+    REG_RHV,        RHV_RHV(HEADPHONE_MUTE),                        /* mute headphone */
+    REG_AAP,        AAP_MICM,                                       /* mute microphone */
+    REG_DAP,        DAP_DEEMP_DIS,                                  /* de-emphasis control: disabled */
+    REG_DAIF,       DAIF_FOR_I2S | DAIF_IWL_24 | ~DAIF_MS,          /* i2s with 24 bit data len and slave mode */
+    REG_SRC,        0,                                              /* ToDo */
+    REG_DIA,        DIA_ACT,                                        /* activate digital interface */
+};
+unsigned tlv320_regs[0xf];
+
+void tlv320_write_reg(unsigned reg, unsigned value)
+{
+    unsigned data[3];
+
+    data[0] = TLV320_ADDR;
+    data[1] = reg << 1;
+    data[2] = value & 0xff; 
+
+    if (i2c_write(1, data, 3) != 3)
+    {
+        DEBUGF("tlv320 error reg=0x%x", reg);
+        return;
+    } 
+
+    tlv320_regs[reg] = value;
+}
+
+/* Returns 0 if successful or -1 if some register failed */
+void tlv320_set_regs()
+{
+    int i;
+    memset(tlv320_regs, 0, sizeof(tlv320_regs));
+
+    /* Initialize all registers */
+    for (i=0; i<NUM_DEFAULT_REGS; i++)
+    {
+        unsigned reg = tlv320_defaults[i*2+0];
+        unsigned value = tlv320_defaults[i*2+1];
+
+        tlv320_write_reg(reg, value);
+    }
+}
+
+/* public functions */
+
+/**
+ * Init our tlv with default values
+ */
+void tlv320_init()
+{
+    tlv320_reset();
+    tlv320_set_regs();
+}
+
+/**
+ * Resets tlv320 to default values
+ */
+void tlv320_reset()
+{
+    tlv320_write_reg(REG_RR, RR_RESET):
+}
+
+void tlv320_enable_output(bool enable)
+{
+    unsigned value = tlv320regs[REG_PC];
+
+    if (enable)
+        value |= PC_OUT;
+    else
+        value &= ~PC_OUT;
+
+    tlv320_write_reg(REG_PC, value);
+}
+
+/**
+ * Sets left and right headphone volume  (127(max) to 48(muted))
+ */
+void tlv320_set_headphone_vol(int vol_l, int vol_r)
+{
+    unsigned value_l = tlv320_regs[REG_LHV];
+    unsigned value_r = tlv320_regs[REG_RHV];
+
+    /* keep track of current setting */
+    tlv320.vol_l = vol_l;
+    tlv320.vol_r = vol_r;
+
+    /* set new values in local register holders */
+    value_l |= LHV_LHV(vol_l);
+    value_r |= LHV_LHV(vol_r);
+
+    /* update */
+    tlv320_write_reg(REG_LHV, value_l);
+    tlv320_write_reg(REG_RHV, value_r);
+}
+
+/**
+ * Sets left and right linein volume  (31(max) to 0(muted))
+ */
+void tlv320_set_linein_vol(int vol_l, int vol_r)
+{
+    unsigned value_l = tlv320regs[REG_LLIV];
+    unsigned value_r = tlv320regs[REG_RLIV];
+
+    value_l |= LLIV_LHV(vol_l);
+    value_r |= RLIV_RHV(vol_r);
+
+    tlv320_write_reg(REG_LLIV, value_l);
+    tlv320_write_reg(REG_RLIV, value_r);
+}
+
+/**
+ * Mute (mute=true) or enable sound (mute=false)
+ *
+ */
+void tlv320_mute(bool mute)
+{
+    unsigned value_l = tlv320regs[REG_LHV];
+    unsigned value_r = tlv320regs[REG_RHV];
+
+    if (mute)
+    {
+        value_l |= LHV_LHV(HEADPHONE_MUTE);
+        value_r |= RHV_RHV(HEADPHONE_MUTE);
+    }
+    else
+    {
+        value_l |= LHV_LHV(tlv320.vol_l);
+        value_r |= RHV_RHV(tlv320.vol_r);
+    }
+
+    tlv320_write_reg(REG_LHV, value_r);
+    tlv320_write_reg(REG_RHV, value_r);
+}
+
+void tlv320_close()
+{
+    /* todo */
+}
+
+void tlv320_enable_recording(bool source_mic)
+{
+    unsigned value_pc = tlv320regs[REG_PC];
+    unsigned value_aap = tlv320regs[REG_AAP];
+
+    /* select source*/
+    if (source_mic)
+    {
+        value_aap &= ~AAP_INSEL;
+        value_pc |= PC_MIC;
+    }
+    else
+    {
+        value_aap |= AAP_INSEL;
+        value_pc |= PC_LINE;
+    }
+
+    /* poweron adc */
+    value_pc |= PC_ADC;
+
+    tlv320_write_reg(REG_AAP, value_aap);
+    tlv320_write_reg(REG_PC, value_pc);
+}
+
+void tlv320_disable_recording()
+{
+    unsigned value = tlv320regs[REG_PC];
+
+    /* powerdown mic, linein and adc */
+    value &= ~(PC_MIC | PC_LINE | PC_ADC);
+
+    /* powerdown mic, linein and adc */
+    tlv320_write_reg(REG_PC, value);
+}
\ No newline at end of file
-- 
cgit v1.1