1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Gigabeat S specific code for the WM8978 codec
*
* Copyright (C) 2008 Michael Sevakis
*
* 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 "kernel.h"
#include "sound.h"
#include "i2c-imx31.h"
/* NOTE: Some port-specific bits will have to be moved away (node and GPIO
* writes) for cleanest implementation. */
static struct i2c_node wm8978_i2c_node =
{
.num = I2C1_NUM,
.ifdr = I2C_IFDR_DIV192, /* 66MHz/.4MHz = 165, closest = 192 = 343750Hz */
/* Just hard-code for now - scaling may require
* updating */
.addr = WMC_I2C_ADDR,
};
void audiohw_init(void)
{
/* USB PLL = 338.688MHz, /30 = 11.2896MHz = 256Fs */
imx31_regmod32(&CLKCTL_PDR1,
PDR1_SSI1_PODFw(64-1) | PDR1_SSI2_PODFw(5-1),
PDR1_SSI1_PODF | PDR1_SSI2_PODF);
imx31_regmod32(&CLKCTL_PDR1,
PDR1_SSI1_PRE_PODFw(4-1) | PDR1_SSI2_PRE_PODFw(1-1),
PDR1_SSI1_PRE_PODF | PDR1_SSI2_PRE_PODF);
i2c_enable_node(&wm8978_i2c_node, true);
audiohw_preinit();
GPIO3_DR |= (1 << 21); /* Turn on analogue LDO */
}
void audiohw_enable_headphone_jack(bool enable)
{
if (enable)
{
GPIO3_DR |= (1 << 22); /* Turn on headphone jack output */
}
else
{
GPIO3_DR &= ~(1 << 22); /* Turn off headphone jack output */
}
}
void wmcodec_write(int reg, int data)
{
unsigned char d[2];
/* |aaaaaaad|dddddddd| */
d[0] = (reg << 1) | ((data & 0x100) >> 8);
d[1] = data;
i2c_write(&wm8978_i2c_node, d, 2);
}
|
