From b8577dd5828b962238569277f96fe1a09321d813 Mon Sep 17 00:00:00 2001
From: Linus Nielsen Feltzing <linus@haxx.se>
Date: Fri, 18 Mar 2005 11:35:11 +0000
Subject: iRiver UDA1380 driver by Andy Young

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6204 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/drivers/uda1380.c | 145 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 firmware/drivers/uda1380.c

(limited to 'firmware/drivers/uda1380.c')

diff --git a/firmware/drivers/uda1380.c b/firmware/drivers/uda1380.c
new file mode 100644
index 0000000000..e8b8c14399
--- /dev/null
+++ b/firmware/drivers/uda1380.c
@@ -0,0 +1,145 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 by Andy Young
+ *
+ * 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-h100.h"
+#include "uda1380.h"
+
+/* ------------------------------------------------- */
+/* Local functions and variables */
+/* ------------------------------------------------- */
+
+int uda1380_write_reg(unsigned char reg, unsigned short value);
+unsigned short uda1380_regs[0x30];
+
+/* Definition of a good (?) configuration to start with */
+/* Not enabling ADC for now.. */
+
+#define NUM_DEFAULT_REGS 13
+unsigned short uda1380_defaults[2*NUM_DEFAULT_REGS] = 
+{
+        REG_0,        EN_DAC | EN_INT | EN_DEC | SYSCLK_256FS | WSPLL_25_50,
+        REG_I2S,      I2S_IFMT_IIS,
+        REG_PWR,      PON_PLL | PON_HP | PON_DAC | EN_AVC | PON_AVC | PON_BIAS,
+        REG_AMIX,     AMIX_RIGHT(0x10) | AMIX_LEFT(0x10), /* 00=max, 3f=mute */
+        REG_MASTER_VOL, MASTER_VOL_LEFT(0x7f) | MASTER_VOL_RIGHT(0x7f), /* 00=max, ff=mute */
+        REG_MIX_VOL,    MIX_VOL_CHANNEL_1(0) | MIX_VOL_CHANNEL_2(0xff), /* 00=max, ff=mute */
+        REG_EQ,         0,
+        REG_MUTE,       MUTE_CH2, /* Mute channel 2 (digital decimation filter) */
+        REG_MIX_CTL,    0,
+        REG_DEC_VOL,    0,
+        REG_PGA,        MUTE_ADC,
+        REG_ADC,        SKIP_DCFIL,
+        REG_AGC,        0
+};
+
+/* Returns 0 if register was written or -1 if write failed */
+int uda1380_write_reg(unsigned char reg, unsigned short value)
+{
+    unsigned char data[4];
+
+    data[0] = UDA1380_ADDR;
+    data[1] = reg;
+    data[2] = value >> 8;
+    data[3] = value & 0xff;
+
+    if (i2c_write(1, data, 4) != 4)
+    {
+        DEBUGF("uda1380 error reg=0x%x", reg);
+        return -1;
+    } 
+
+    uda1380_regs[reg] = value;
+
+    return 0;
+}
+
+/**
+ * Sets the master volume
+ *
+ * \param vol Range [0..255] 0=max, 255=mute
+ *
+ */
+int uda1380_setvol(int vol)
+{
+    return uda1380_write_reg(REG_MASTER_VOL,
+                             MASTER_VOL_LEFT(vol) | MASTER_VOL_RIGHT(vol));
+}
+
+/**
+ * Mute (mute=1) or enable sound (mute=0)
+ *
+ */
+int uda1380_mute(int mute)
+{
+    unsigned int value = uda1380_regs[REG_MUTE];
+
+    if (mute)
+        value = value | MUTE_MASTER;
+    else
+        value = value & ~MUTE_MASTER;
+
+    return uda1380_write_reg(REG_MUTE, value);
+}
+
+/* Returns 0 if successful or -1 if some register failed */
+int uda1380_set_regs(void)
+{
+    int i;
+    memset(uda1380_regs, 0, sizeof(uda1380_regs));
+
+    /* Initialize all registers */
+    for (i=0; i<NUM_DEFAULT_REGS; i++)
+    {
+        unsigned char reg = uda1380_defaults[i*2+0];
+        unsigned short value = uda1380_defaults[i*2+1];
+
+        if (uda1380_write_reg(reg, value) == -1)
+            return -1;
+    }
+
+    return 0;
+}
+
+/* Initialize UDA1380 codec with default register values (uda1380_defaults) */
+int uda1380_init(void)
+{
+    if (uda1380_set_regs() == -1)
+        return -1;
+    
+    return 0;
+}
+
+/* Nice shutdown of UDA1380 codec */
+void uda1380_close(void)
+{
+    uda1380_write_reg(REG_PWR, 0);  /* Disable power    */
+    uda1380_write_reg(REG_0, 0);    /* Disable codec    */
+}
-- 
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