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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
*
* Copyright (c) 2023 Dana Conrad
*
* 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 "system.h"
#include "es9018k2m.h"
#include "i2c-async.h"
#ifndef BOOTLOADER
# include "action.h"
#endif
//======================================================================================
// ES9018K2M support stuff
#ifndef ES9018K2M_BUS
# error "No definition for ES9018K2M I2C bus!"
#endif
#ifndef ES9018K2M_ADDR
# error "No definition for ES9018K2M I2C address!"
#endif
#ifndef BOOTLOADER
static int vol_tenthdb2hw(const int tdb)
{
if (tdb < ES9018K2M_VOLUME_MIN) {
return 0xff;
} else if (tdb > ES9018K2M_VOLUME_MAX) {
return 0x00;
} else {
return (-tdb/5);
}
}
/* NOTE: This implementation is for the ES9018K2M specifically. */
/* Register defaults from the datasheet. */
/* These are basically just for reference. All defaults work out for us.
* static uint8_t reg0_system_settings = 0x00; // System settings. Default value of register 0
* static uint8_t reg1_input_configuration = 0x8C; // Input settings. I2S input, 32-bit
* static uint8_t reg4_automute_time = 0x00; // Automute time. Default = disabled
* static uint8_t reg5_automute_level = 0x68; // Automute level. Default is some level
* static uint8_t reg6_deemphasis = 0x4A; // Deemphasis. Default = disabled
*/
static uint8_t reg7_general_settings = 0x80; // General settings. Default sharp fir, pcm iir and unmuted
/*
* static uint8_t reg8_gpio_configuration = 0x10; // GPIO configuration
* static uint8_t reg10_master_mode_control = 0x05; // Master Mode Control. Default value: master mode off
* static uint8_t reg11_channel_mapping = 0x02; // Channel Mapping. Default stereo is Ch1=left, Ch2=right
* static uint8_t reg12_dpll_settings = 0x5A; // DPLL Settings. Default = 5 for I2S, A for DSD
* static uint8_t reg13_thd_comp = 0x40; // THD Compensation
* static uint8_t reg14_softstart_settings = 0x8A; // Soft Start Settings
*/
static uint8_t reg21_gpio_input_selection = 0x00; // Oversampling filter. Default: oversampling ON
#define bitSet(value, bit) ((value) |= (1UL << (bit)))
#define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
static uint8_t vol_reg_l = ES9018K2M_REG15_VOLUME_L;
static uint8_t reg15_vol_l = 0;
i2c_descriptor vol_desc_l = {
.slave_addr = ES9018K2M_ADDR,
.bus_cond = I2C_START | I2C_STOP,
.tran_mode = I2C_WRITE,
.buffer[0] = &vol_reg_l,
.count[0] = 1,
.buffer[1] = ®15_vol_l,
.count[1] = 1,
.callback = NULL,
.arg = 0,
.next = NULL,
};
static uint8_t vol_reg_r = ES9018K2M_REG16_VOLUME_R;
static uint8_t reg16_vol_r = 0;
i2c_descriptor vol_desc_r = {
.slave_addr = ES9018K2M_ADDR,
.bus_cond = I2C_START | I2C_STOP,
.tran_mode = I2C_WRITE,
.buffer[0] = &vol_reg_r,
.count[0] = 1,
.buffer[1] = ®16_vol_r,
.count[1] = 1,
.callback = NULL,
.arg = 0,
.next = NULL,
};
void es9018k2m_set_volume_async(int vol_l, int vol_r)
{
/* Queue writes to the DAC's volume.
* Note that this needs to be done asynchronously. From testing, calling
* synchronous writes from HP/LO detect causes hangs. */
reg15_vol_l = vol_tenthdb2hw(vol_l);
reg16_vol_r = vol_tenthdb2hw(vol_r);
i2c_async_queue(ES9018K2M_BUS, TIMEOUT_NOBLOCK, I2C_Q_ADD, 0, &vol_desc_l);
i2c_async_queue(ES9018K2M_BUS, TIMEOUT_NOBLOCK, I2C_Q_ADD, 0, &vol_desc_r);
}
void es9018k2m_set_filter_roll_off(int value)
{
/* Note: the ihifi800 implementation manipulates
* bit 0 of reg21, but I think that is incorrect?
* Bit 2 is the bypass for the IIR digital filters,
* Whereas Bit 0 is the oversampling filter, which
* the datasheet seems to say should be left on. */
/* 0 = "Sharp" / Fast Rolloff (Default)
1 = Slow Rolloff
2 = "Short" / Minimum Phase
3 = Bypass */
switch(value)
{
case 0:
bitClear(reg7_general_settings, 5);
bitClear(reg7_general_settings, 6);
bitClear(reg21_gpio_input_selection, 2);
break;
case 1:
bitSet(reg7_general_settings, 5);
bitClear(reg7_general_settings, 6);
bitClear(reg21_gpio_input_selection, 2);
break;
case 2:
bitClear(reg7_general_settings, 5);
bitSet(reg7_general_settings, 6);
bitClear(reg21_gpio_input_selection, 2);
break;
case 3:
bitSet(reg21_gpio_input_selection, 2);
break;
}
es9018k2m_write_reg(ES9018K2M_REG7_GENERAL_SETTINGS, reg7_general_settings);
es9018k2m_write_reg(ES9018K2M_REG21_GPIO_INPUT_SELECT, reg21_gpio_input_selection);
}
#endif /* !defined(BOOTLOADER) */
/* returns I2C_STATUS_OK upon success, I2C_STATUS_* errors upon error */
int es9018k2m_write_reg(uint8_t reg, uint8_t val)
{
return i2c_reg_write1(ES9018K2M_BUS, ES9018K2M_ADDR, reg, val);
}
/* returns register value, or -1 upon error */
int es9018k2m_read_reg(uint8_t reg)
{
return i2c_reg_read1(ES9018K2M_BUS, ES9018K2M_ADDR, reg);
}
|
