1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Driver for WM8751 audio codec
12 * Based on code from the ipodlinux project - http://ipodlinux.org/
13 * Adapted for Rockbox in December 2005
15 * Original file: linux/arch/armnommu/mach-ipod/audio.c
17 * Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License
21 * as published by the Free Software Foundation; either version 2
22 * of the License, or (at your option) any later version.
24 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
25 * KIND, either express or implied.
27 ****************************************************************************/
34 const struct sound_settings_info audiohw_settings
[] = {
35 [SOUND_VOLUME
] = {"dB", 0, 1, -74, 6, -25},
36 #ifdef USE_ADAPTIVE_BASS
37 [SOUND_BASS
] = {"", 0, 1, 0, 15, 0},
39 [SOUND_BASS
] = {"dB", 1, 15, -60, 90, 0},
41 [SOUND_TREBLE
] = {"dB", 1, 15, -60, 90, 0},
42 [SOUND_BALANCE
] = {"%", 0, 1,-100, 100, 0},
43 [SOUND_CHANNELS
] = {"", 0, 1, 0, 5, 0},
44 [SOUND_STEREO_WIDTH
] = {"%", 0, 5, 0, 250, 100},
47 /* Flags used in combination with settings */
49 /* use zero crossing to reduce clicks during volume changes */
50 #define LOUT1_BITS (LOUT1_LO1ZC)
51 /* latch left volume first then update left+right together */
52 #define ROUT1_BITS (ROUT1_RO1ZC | ROUT1_RO1VU)
53 #define LOUT2_BITS (LOUT2_LO2ZC)
54 #define ROUT2_BITS (ROUT2_RO2ZC | ROUT2_RO2VU)
55 /* We use linear bass control with 200 Hz cutoff */
56 #ifdef USE_ADAPTIVE_BASE
57 #define BASSCTRL_BITS (BASSCTRL_BC | BASSCTRL_BB)
59 #define BASSCTRL_BITS (BASSCTRL_BC)
61 /* We use linear treble control with 4 kHz cutoff */
62 #define TREBCTRL_BITS (TREBCTRL_TC)
64 /* convert tenth of dB volume (-730..60) to master volume register value */
65 int tenthdb2master(int db
)
67 /* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
68 /* 1111111 == +6dB (0x7f) */
69 /* 1111001 == 0dB (0x79) */
70 /* 0110000 == -73dB (0x30) */
71 /* 0101111..0000000 == mute (<= 0x2f) */
75 return (db
/ 10) + 73 + 0x30;
78 static int tone_tenthdb2hw(int value
)
80 /* -6.0db..+0db..+9.0db step 1.5db - translate -60..+0..+90 step 15
83 value
= 10 - (value
+ 60) / 15;
86 value
= 0xf; /* 0db -> off */
92 #ifdef USE_ADAPTIVE_BASS
93 static int adaptivebass2hw(int value
)
95 /* 0 to 15 step 1 - step -1 0 = off is a 15 in the register */
102 /* Reset and power up the WM8751 */
103 void audiohw_preinit(void)
106 /* controls headphone ouput */
107 GPIOL_ENABLE
|= 0x10;
108 GPIOL_OUTPUT_EN
|= 0x10;
109 GPIOL_OUTPUT_VAL
|= 0x10; /* disable */
113 * 1. Switch on power supplies.
114 * By default the WM8751 is in Standby Mode, the DAC is
115 * digitally muted and the Audio Interface, Line outputs
116 * and Headphone outputs are all OFF (DACMU = 1 Power
117 * Management registers 1 and 2 are all zeros).
119 wmcodec_write(RESET
, RESET_RESET
); /*Reset*/
121 /* 2. Enable Vmid and VREF. */
122 wmcodec_write(PWRMGMT1
, PWRMGMT1_VREF
| PWRMGMT1_VMIDSEL_5K
);
124 /* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
125 /* IWL=00(16 bit) FORMAT=10(I2S format) */
126 wmcodec_write(AINTFCE
, AINTFCE_MS
| AINTFCE_WL_16
|
129 /* Set default samplerate */
130 audiohw_set_frequency(HW_FREQ_DEFAULT
);
133 /* Enable DACs and audio output after a short delay */
134 void audiohw_postinit(void)
136 /* From app notes: allow Vref to stabilize to reduce clicks */
139 /* 3. Enable DACs as required. */
140 wmcodec_write(PWRMGMT2
, PWRMGMT2_DACL
| PWRMGMT2_DACR
);
142 /* 4. Enable line and / or headphone output buffers as required. */
144 wmcodec_write(PWRMGMT2
, PWRMGMT2_DACL
| PWRMGMT2_DACR
|
145 PWRMGMT2_LOUT1
| PWRMGMT2_ROUT1
);
147 wmcodec_write(PWRMGMT2
, PWRMGMT2_DACL
| PWRMGMT2_DACR
|
148 PWRMGMT2_LOUT1
| PWRMGMT2_ROUT1
| PWRMGMT2_LOUT2
|
152 wmcodec_write(ADDITIONAL1
, ADDITIONAL1_TSDEN
| ADDITIONAL1_TOEN
|
153 ADDITIONAL1_DMONOMIX_LLRR
| ADDITIONAL1_VSEL_DEFAULT
);
155 wmcodec_write(LEFTMIX1
, LEFTMIX1_LD2LO
| LEFTMIX1_LI2LO_DEFAULT
);
156 wmcodec_write(RIGHTMIX2
, RIGHTMIX2_RD2RO
| RIGHTMIX2_RI2RO_DEFAULT
);
158 #ifdef TOSHIBA_GIGABEAT_F
159 #ifdef HAVE_HARDWARE_BEEP
160 /* Single-ended mono input */
161 wmcodec_write(MONOMIX1
, 0);
163 /* Route mono input to both outputs at 0dB */
164 wmcodec_write(LEFTMIX2
, LEFTMIX2_MI2LO
| LEFTMIX2_MI2LOVOL(2));
165 wmcodec_write(RIGHTMIX1
, RIGHTMIX1_MI2RO
| RIGHTMIX1_MI2ROVOL(2));
172 /* enable headphone output */
173 GPIOL_OUTPUT_VAL
&= ~0x10;
174 GPIOL_OUTPUT_EN
|= 0x10;
178 void audiohw_set_master_vol(int vol_l
, int vol_r
)
180 /* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
181 /* 1111111 == +6dB */
183 /* 0110000 == -73dB */
184 /* 0101111 == mute (0x2f) */
186 wmcodec_write(LOUT1
, LOUT1_BITS
| LOUT1_LOUT1VOL(vol_l
));
187 wmcodec_write(ROUT1
, ROUT1_BITS
| ROUT1_ROUT1VOL(vol_r
));
191 void audiohw_set_lineout_vol(int vol_l
, int vol_r
)
193 wmcodec_write(LOUT2
, LOUT2_BITS
| LOUT2_LOUT2VOL(vol_l
));
194 wmcodec_write(ROUT2
, ROUT2_BITS
| ROUT2_ROUT2VOL(vol_r
));
198 void audiohw_set_bass(int value
)
200 wmcodec_write(BASSCTRL
, BASSCTRL_BITS
|
202 #ifdef USE_ADAPTIVE_BASS
203 BASSCTRL_BASS(adaptivebass2hw(value
)));
205 BASSCTRL_BASS(tone_tenthdb2hw(value
)));
209 void audiohw_set_treble(int value
)
211 wmcodec_write(TREBCTRL
, TREBCTRL_BITS
|
212 TREBCTRL_TREB(tone_tenthdb2hw(value
)));
215 void audiohw_mute(bool mute
)
217 /* Mute: Set DACMU = 1 to soft-mute the audio DACs. */
218 /* Unmute: Set DACMU = 0 to soft-un-mute the audio DACs. */
219 wmcodec_write(DACCTRL
, mute
? DACCTRL_DACMU
: 0);
222 /* Nice shutdown of WM8751 codec */
223 void audiohw_close(void)
225 /* 1. Set DACMU = 1 to soft-mute the audio DACs. */
228 /* 2. Disable all output buffers. */
229 wmcodec_write(PWRMGMT2
, 0x0);
231 /* 3. Switch off the power supplies. */
232 wmcodec_write(PWRMGMT1
, 0x0);
235 void audiohw_set_frequency(int fsel
)
237 static const unsigned char srctrl_table
[HW_NUM_FREQ
] =
239 HW_HAVE_11_([HW_FREQ_11
] = CODEC_SRCTRL_11025HZ
,)
240 HW_HAVE_22_([HW_FREQ_22
] = CODEC_SRCTRL_22050HZ
,)
241 HW_HAVE_44_([HW_FREQ_44
] = CODEC_SRCTRL_44100HZ
,)
242 HW_HAVE_88_([HW_FREQ_88
] = CODEC_SRCTRL_88200HZ
,)
245 if ((unsigned)fsel
>= HW_NUM_FREQ
)
246 fsel
= HW_FREQ_DEFAULT
;
248 wmcodec_write(CLOCKING
, srctrl_table
[fsel
]);