1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Driver for WM8975 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 * All files in this archive are subject to the GNU General Public License.
20 * See the file COPYING in the source tree root for full license agreement.
22 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
23 * KIND, either express or implied.
25 ****************************************************************************/
35 /* use zero crossing to reduce clicks during volume changes */
36 #define VOLUME_ZC_WAIT (1<<7)
38 const struct sound_settings_info audiohw_settings
[] = {
39 [SOUND_VOLUME
] = {"dB", 0, 1, -74, 6, -25},
40 [SOUND_BASS
] = {"dB", 0, 1, -6, 9, 0},
41 [SOUND_TREBLE
] = {"dB", 0, 1, -6, 9, 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},
45 [SOUND_LEFT_GAIN
] = {"dB", 1, 1,-128, 96, 0},
46 [SOUND_RIGHT_GAIN
] = {"dB", 1, 1,-128, 96, 0},
47 [SOUND_MIC_GAIN
] = {"dB", 1, 1,-128, 108, 16},
50 /* convert tenth of dB volume (-730..60) to master volume register value */
51 int tenthdb2master(int db
)
53 /* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
54 /* 1111111 == +6dB (0x7f) */
55 /* 1111001 == 0dB (0x79) */
56 /* 0110000 == -73dB (0x30 */
57 /* 0101111..0000000 == mute (0x2f) */
59 if (db
< VOLUME_MIN
) {
62 return((db
/10)+73+0x30);
66 #define IPOD_PCM_LEVEL 0x65 /* -6dB */
69 /* Silently enable / disable audio output */
70 void audiohw_enable_output(bool enable
)
74 /* reset the I2S controller into known state */
78 * 1. Switch on power supplies.
79 * By default the WM8750L is in Standby Mode, the DAC is
80 * digitally muted and the Audio Interface, Line outputs
81 * and Headphone outputs are all OFF (DACMU = 1 Power
82 * Management registers 1 and 2 are all zeros).
84 wmcodec_write(RESET
, 0x1ff); /*Reset*/
85 wmcodec_write(RESET
, 0x0);
87 /* 2. Enable Vmid and VREF. */
88 wmcodec_write(PWRMGMT1
, 0xc0); /*Pwr Mgmt(1)*/
90 /* From app notes: allow Vref to stabilize to reduce clicks */
93 /* 3. Enable DACs as required. */
94 wmcodec_write(PWRMGMT2
, 0x180); /*Pwr Mgmt(2)*/
96 /* 4. Enable line and / or headphone output buffers as required. */
97 wmcodec_write(PWRMGMT2
, 0x1f8); /*Pwr Mgmt(2)*/
99 /* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
100 /* IWL=00(16 bit) FORMAT=10(I2S format) */
101 wmcodec_write(AINTFCE
, 0x42);
103 /* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
104 audiohw_set_sample_rate(WM8975_44100HZ
);
106 /* set the volume to -6dB */
107 wmcodec_write(LOUT1VOL
, VOLUME_ZC_WAIT
| IPOD_PCM_LEVEL
);
108 wmcodec_write(ROUT1VOL
, VOLUME_ZC_WAIT
| 0x100 | IPOD_PCM_LEVEL
);
110 wmcodec_write(LOUTMIX1
, 0x150); /* Left out Mix(def) */
111 wmcodec_write(LOUTMIX2
, 0x50);
113 wmcodec_write(ROUTMIX1
, 0x50); /* Right out Mix(def) */
114 wmcodec_write(ROUTMIX2
, 0x150);
116 wmcodec_write(MOUTMIX1
, 0x0); /* Mono out Mix */
117 wmcodec_write(MOUTMIX2
, 0x0);
127 int audiohw_set_master_vol(int vol_l
, int vol_r
)
129 /* +6 to -73dB 1dB steps (plus mute == 80levels) 7bits */
130 /* 1111111 == +6dB */
132 /* 0110000 == -73dB */
133 /* 0101111 == mute (0x2f) */
136 wmcodec_write(LOUT1VOL
, VOLUME_ZC_WAIT
| vol_l
);
137 wmcodec_write(ROUT1VOL
, VOLUME_ZC_WAIT
| 0x100 | vol_r
);
142 int audiohw_set_lineout_vol(int vol_l
, int vol_r
)
145 wmcodec_write(LOUT2VOL
, VOLUME_ZC_WAIT
| vol_l
);
146 wmcodec_write(ROUT2VOL
, VOLUME_ZC_WAIT
| 0x100 | vol_r
);
151 void audiohw_set_bass(int value
)
153 const int regvalues
[] = {
154 11, 10, 10, 9, 8, 8, 0xf, 6, 6, 5, 4, 4, 3, 2, 1, 0
157 if ((value
>= -6) && (value
<= 9)) {
158 /* We use linear bass control with 200 Hz cutoff */
159 wmcodec_write(BASSCTRL
, regvalues
[value
+ 6] | 0x40);
163 void audiohw_set_treble(int value
)
165 const int regvalues
[] = {
166 11, 10, 10, 9, 8, 8, 0xf, 6, 6, 5, 4, 4, 3, 2, 1, 0
169 if ((value
>= -6) && (value
<= 9)) {
170 /* We use linear treble control with 4 kHz cutoff */
171 wmcodec_write(TREBCTRL
, regvalues
[value
+ 6] | 0x40);
175 void audiohw_mute(bool mute
)
179 /* Set DACMU = 1 to soft-mute the audio DACs. */
180 wmcodec_write(DACCTRL
, 0x8);
182 /* Set DACMU = 0 to soft-un-mute the audio DACs. */
183 wmcodec_write(DACCTRL
, 0x0);
187 /* Nice shutdown of WM8975 codec */
188 void audiohw_close(void)
190 /* 1. Set DACMU = 1 to soft-mute the audio DACs. */
191 wmcodec_write(DACCTRL
, 0x8);
193 /* 2. Disable all output buffers. */
194 wmcodec_write(PWRMGMT2
, 0x0); /*Pwr Mgmt(2)*/
196 /* 3. Switch off the power supplies. */
197 wmcodec_write(PWRMGMT1
, 0x0); /*Pwr Mgmt(1)*/
200 /* Change the order of the noise shaper, 5th order is recommended above 32kHz */
201 void audiohw_set_nsorder(int order
)
206 /* Note: Disable output before calling this function */
207 void audiohw_set_sample_rate(int sampling_control
) {
209 wmcodec_write(0x08, sampling_control
);
213 void audiohw_enable_recording(bool source_mic
)
217 /* reset the I2S controller into known state */
221 * 1. Switch on power supplies.
222 * By default the WM8750L is in Standby Mode, the DAC is
223 * digitally muted and the Audio Interface, Line outputs
224 * and Headphone outputs are all OFF (DACMU = 1 Power
225 * Management registers 1 and 2 are all zeros).
227 wmcodec_write(0x0f, 0x1ff);
228 wmcodec_write(0x0f, 0x000);
230 /* 2. Enable Vmid and VREF. */
231 wmcodec_write(0x19, 0xc0); /*Pwr Mgmt(1)*/
233 /* 3. Enable ADCs as required. */
234 wmcodec_write(0x19, 0xcc); /*Pwr Mgmt(1)*/
235 wmcodec_write(0x1a, 0x180); /*Pwr Mgmt(2)*/
237 /* 4. Enable line and / or headphone output buffers as required. */
238 wmcodec_write(0x19, 0xfc); /*Pwr Mgmt(1)*/
240 /* BCLKINV=0(Dont invert BCLK) MS=1(Enable Master) LRSWAP=0 LRP=0 */
241 /* IWL=00(16 bit) FORMAT=10(I2S format) */
242 wmcodec_write(0x07, 0x42);
244 /* The iPod can handle multiple frequencies, but fix at 44.1KHz for now */
245 audiohw_set_sample_rate(WM8975_44100HZ
);
248 wmcodec_write(0x00, 0x17); /* LINVOL (def 0dB) */
249 wmcodec_write(0x01, 0x117); /* RINVOL (def 0dB) */
251 wmcodec_write(0x15, 0x1d7); /* LADCVOL max vol x was ff */
252 wmcodec_write(0x16, 0x1d7); /* RADCVOL max vol x was ff */
255 /* VSEL=10(def) DATSEL=10 (use right ADC only) */
256 wmcodec_write(0x17, 0xc9); /* Additional control(1) */
258 /* VROI=1 (sets output resistance to 40kohms) */
259 wmcodec_write(0x1b, 0x40); /* Additional control(3) */
261 /* LINSEL=1 (LINPUT2) LMICBOOST=10 (20dB boost) */
262 wmcodec_write(0x20, 0x60); /* ADCL signal path */
263 wmcodec_write(0x21, 0x60); /* ADCR signal path */
265 /* VSEL=10(def) DATSEL=00 (left->left, right->right) */
266 wmcodec_write(0x17, 0xc1); /* Additional control(1) */
268 /* VROI=1 (sets output resistance to 40kohms) */
269 wmcodec_write(0x1b, 0x40); /* Additional control(3) */
271 /* LINSEL=0 (LINPUT1) LMICBOOST=00 (bypass boost) */
272 wmcodec_write(0x20, 0x00); /* ADCL signal path */
273 /* RINSEL=0 (RINPUT1) RMICBOOST=00 (bypass boost) */
274 wmcodec_write(0x21, 0x00); /* ADCR signal path */
278 void audiohw_disable_recording(void) {
279 /* 1. Set DACMU = 1 to soft-mute the audio DACs. */
280 wmcodec_write(0x05, 0x8);
282 /* 2. Disable all output buffers. */
283 wmcodec_write(0x1a, 0x0); /*Pwr Mgmt(2)*/
285 /* 3. Switch off the power supplies. */
286 wmcodec_write(0x19, 0x0); /*Pwr Mgmt(1)*/
289 void audiohw_set_recvol(int left
, int right
, int type
) {
296 void audiohw_set_monitor(bool enable
) {