diff options
Diffstat (limited to 'firmware/target/mips/ingenic_x1000/shanlingq1/audiohw-shanlingq1.c')
-rw-r--r-- | firmware/target/mips/ingenic_x1000/shanlingq1/audiohw-shanlingq1.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/firmware/target/mips/ingenic_x1000/shanlingq1/audiohw-shanlingq1.c b/firmware/target/mips/ingenic_x1000/shanlingq1/audiohw-shanlingq1.c new file mode 100644 index 0000000000..7314f20412 --- /dev/null +++ b/firmware/target/mips/ingenic_x1000/shanlingq1/audiohw-shanlingq1.c | |||
@@ -0,0 +1,191 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2021 Aidan MacDonald | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include "audiohw.h" | ||
23 | #include "system.h" | ||
24 | #include "pcm_sampr.h" | ||
25 | #include "aic-x1000.h" | ||
26 | #include "i2c-x1000.h" | ||
27 | #include "gpio-x1000.h" | ||
28 | #include "x1000/aic.h" | ||
29 | #include "x1000/cpm.h" | ||
30 | |||
31 | /* Codec has an dedicated oscillator connected, so it can operate | ||
32 | * as i2s master or slave. I can't distinguish any difference in | ||
33 | * terms of audio quality or power consumption. Code is left here | ||
34 | * for reference in case it proves useful to change it. */ | ||
35 | #define CODEC_MASTER_MODE 0 | ||
36 | |||
37 | static int cur_fsel = HW_FREQ_48; | ||
38 | static int cur_vol_l = 0, cur_vol_r = 0; | ||
39 | static int cur_filter = 0; | ||
40 | static enum es9218_amp_mode cur_amp_mode = ES9218_AMP_MODE_1VRMS; | ||
41 | |||
42 | static void codec_start(void) | ||
43 | { | ||
44 | es9218_open(); | ||
45 | es9218_mute(true); | ||
46 | es9218_set_iface_role(CODEC_MASTER_MODE ? ES9218_IFACE_ROLE_MASTER | ||
47 | : ES9218_IFACE_ROLE_SLAVE); | ||
48 | es9218_set_iface_format(ES9218_IFACE_FORMAT_I2S, ES9218_IFACE_BITS_32); | ||
49 | es9218_set_dpll_bandwidth(10); | ||
50 | es9218_set_thd_compensation(true); | ||
51 | es9218_set_thd_coeffs(0, 0); | ||
52 | audiohw_set_filter_roll_off(cur_filter); | ||
53 | audiohw_set_frequency(cur_fsel); | ||
54 | audiohw_set_volume(cur_vol_l, cur_vol_r); | ||
55 | es9218_set_amp_mode(cur_amp_mode); | ||
56 | } | ||
57 | |||
58 | static void codec_stop(void) | ||
59 | { | ||
60 | es9218_mute(true); | ||
61 | es9218_close(); | ||
62 | mdelay(1); | ||
63 | } | ||
64 | |||
65 | void audiohw_init(void) | ||
66 | { | ||
67 | /* Configure AIC */ | ||
68 | aic_set_external_codec(true); | ||
69 | aic_set_i2s_mode(CODEC_MASTER_MODE ? AIC_I2S_SLAVE_MODE | ||
70 | : AIC_I2S_MASTER_MODE); | ||
71 | aic_enable_i2s_bit_clock(true); | ||
72 | |||
73 | /* Open DAC driver */ | ||
74 | i2c_x1000_set_freq(1, I2C_FREQ_400K); | ||
75 | codec_start(); | ||
76 | } | ||
77 | |||
78 | void audiohw_postinit(void) | ||
79 | { | ||
80 | es9218_mute(false); | ||
81 | } | ||
82 | |||
83 | void audiohw_close(void) | ||
84 | { | ||
85 | codec_stop(); | ||
86 | } | ||
87 | |||
88 | void audiohw_set_frequency(int fsel) | ||
89 | { | ||
90 | int sampr = hw_freq_sampr[fsel]; | ||
91 | |||
92 | /* choose clock gear setting, in line with the OF */ | ||
93 | enum es9218_clock_gear clkgear; | ||
94 | if(sampr <= 48000) | ||
95 | clkgear = ES9218_CLK_GEAR_4; | ||
96 | else if(sampr <= 96000) | ||
97 | clkgear = ES9218_CLK_GEAR_2; | ||
98 | else | ||
99 | clkgear = ES9218_CLK_GEAR_1; | ||
100 | |||
101 | aic_enable_i2s_bit_clock(false); | ||
102 | es9218_set_clock_gear(clkgear); | ||
103 | |||
104 | if(CODEC_MASTER_MODE) | ||
105 | es9218_set_nco_frequency(sampr); | ||
106 | else | ||
107 | aic_set_i2s_clock(X1000_CLK_SCLK_A, sampr, 64); | ||
108 | |||
109 | aic_enable_i2s_bit_clock(true); | ||
110 | |||
111 | /* save frequency selection */ | ||
112 | cur_fsel = fsel; | ||
113 | } | ||
114 | |||
115 | static int round_step_up(int x, int step) | ||
116 | { | ||
117 | int rem = x % step; | ||
118 | if(rem > 0) | ||
119 | rem -= step; | ||
120 | return x - rem; | ||
121 | } | ||
122 | |||
123 | void audiohw_set_volume(int vol_l, int vol_r) | ||
124 | { | ||
125 | /* save volume */ | ||
126 | cur_vol_l = vol_l; | ||
127 | cur_vol_r = vol_r; | ||
128 | |||
129 | /* adjust the amp setting first */ | ||
130 | int amp = round_step_up(MAX(vol_l, vol_r), ES9218_AMP_VOLUME_STEP); | ||
131 | amp = MIN(amp, ES9218_AMP_VOLUME_MAX); | ||
132 | amp = MAX(amp, ES9218_AMP_VOLUME_MIN); | ||
133 | |||
134 | /* adjust digital volumes */ | ||
135 | vol_l -= amp; | ||
136 | vol_l = MIN(vol_l, ES9218_DIG_VOLUME_MAX); | ||
137 | vol_l = MAX(vol_l, ES9218_DIG_VOLUME_MIN); | ||
138 | |||
139 | vol_r -= amp; | ||
140 | vol_r = MIN(vol_r, ES9218_DIG_VOLUME_MAX); | ||
141 | vol_r = MAX(vol_r, ES9218_DIG_VOLUME_MIN); | ||
142 | |||
143 | /* program DAC */ | ||
144 | es9218_set_amp_volume(amp); | ||
145 | es9218_set_dig_volume(vol_l, vol_r); | ||
146 | } | ||
147 | |||
148 | void audiohw_set_filter_roll_off(int value) | ||
149 | { | ||
150 | cur_filter = value; | ||
151 | es9218_set_filter(value); | ||
152 | } | ||
153 | |||
154 | void audiohw_set_power_mode(int mode) | ||
155 | { | ||
156 | enum es9218_amp_mode new_amp_mode; | ||
157 | if(mode == 0) | ||
158 | new_amp_mode = ES9218_AMP_MODE_2VRMS; | ||
159 | else | ||
160 | new_amp_mode = ES9218_AMP_MODE_1VRMS; | ||
161 | |||
162 | if(new_amp_mode != cur_amp_mode) { | ||
163 | codec_stop(); | ||
164 | cur_amp_mode = new_amp_mode; | ||
165 | codec_start(); | ||
166 | es9218_mute(false); | ||
167 | } | ||
168 | } | ||
169 | |||
170 | void es9218_set_power_pin(int level) | ||
171 | { | ||
172 | gpio_set_level(GPIO_ES9218_POWER, level ? 1 : 0); | ||
173 | } | ||
174 | |||
175 | void es9218_set_reset_pin(int level) | ||
176 | { | ||
177 | gpio_set_level(GPIO_ES9218_RESET, level ? 1 : 0); | ||
178 | } | ||
179 | |||
180 | uint32_t es9218_get_mclk(void) | ||
181 | { | ||
182 | /* Measured by running the DAC in asynchronous I2S slave mode, | ||
183 | * and reading back the DPLL number from regs 0x42-0x45 while | ||
184 | * playing back 44.1 KHz audio. | ||
185 | * | ||
186 | * CLK = (44_100 * 2**32) / 0x4b46e5 | ||
187 | * = 38_393_403.29532737 | ||
188 | * ~ 38.4 Mhz | ||
189 | */ | ||
190 | return 38400000; | ||
191 | } | ||