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Submit final part of FS#12154. Optimization for WM8758 used in iPod Video: Significantly reduce popping noise during startup. Additionally improve crosstalk, THD and noise level. Thanks to Seheon Ryu.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30025 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andree Buschmann 2011-06-20 18:52:31 +00:00
parent f0c032a523
commit 8d7eb5d59e
1 changed files with 37 additions and 11 deletions
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48
firmware/drivers/audio/wm8758.c
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@ -121,36 +121,52 @@ static void audiohw_mute(bool mute)
if (mute) {
wmcodec_write(DACCTRL, DACCTRL_SOFTMUTE);
} else {
wmcodec_write(DACCTRL, 0);
wmcodec_write(DACCTRL, DACCTRL_DACOSR128);
}
}
void audiohw_preinit(void)
{
wmcodec_write(RESET, RESET_RESET);
wmcodec_write(PWRMGMT1, PWRMGMT1_PLLEN | PWRMGMT1_BIASEN
| PWRMGMT1_VMIDSEL_10K);
/* Set low bias mode */
wmcodec_write(BIASCTRL, BIASCTRL_BIASCUT);
/* Enable HPCOM, LINECOM */
wmcodec_write(OUTCTRL, OUTCTRL_HP_COM | OUTCTRL_LINE_COM
| OUTCTRL_TSOPCTRL | OUTCTRL_TSDEN | OUTCTRL_VROI);
/* Mute all Outputs and set PGAs minimum gain */
wmcodec_write(LOUT1VOL, 0x140);
wmcodec_write(ROUT1VOL, 0x140);
wmcodec_write(LOUT2VOL, 0x140);
wmcodec_write(ROUT2VOL, 0x140);
wmcodec_write(OUT3MIX, 0x40);
wmcodec_write(OUT4MIX, 0x40);
/* Enable L/ROUT1 */
wmcodec_write(PWRMGMT2, PWRMGMT2_ROUT1EN | PWRMGMT2_LOUT1EN);
wmcodec_write(PWRMGMT3, PWRMGMT3_LOUT2EN | PWRMGMT3_ROUT2EN
| PWRMGMT3_RMIXEN | PWRMGMT3_LMIXEN
/* Enable VMID independent current bias */
wmcodec_write(OUT4TOADC, OUT4TOADC_POBCTRL);
/* Enable required DACs and mixers */
wmcodec_write(PWRMGMT3, PWRMGMT3_RMIXEN | PWRMGMT3_LMIXEN
| PWRMGMT3_DACENR | PWRMGMT3_DACENL);
/* Enable VMIDSEL, BIASEN, BUFIOEN */
wmcodec_write(PWRMGMT1, PWRMGMT1_PLLEN | PWRMGMT1_BIASEN
| PWRMGMT1_BUFIOEN | PWRMGMT1_VMIDSEL_10K);
/* Setup digital interface, input amplifiers, PLL, ADCs and DACs */
wmcodec_write(AINTFCE, AINTFCE_IWL_16BIT | AINTFCE_FORMAT_I2S);
wmcodec_write(OUTCTRL, OUTCTRL_VROI);
wmcodec_write(CLKCTRL, CLKCTRL_MS); /* WM8758 is clock master */
audiohw_set_frequency(HW_FREQ_44);
wmcodec_write(LOUTMIX, LOUTMIX_DACL2LMIX);
wmcodec_write(ROUTMIX, ROUTMIX_DACR2RMIX);
/* Disable VMID independent current bias */
wmcodec_write(OUT4TOADC, 0);
}
void audiohw_postinit(void)
{
wmcodec_write(PWRMGMT1, PWRMGMT1_PLLEN | PWRMGMT1_BIASEN
| PWRMGMT1_VMIDSEL_100K);
| PWRMGMT1_BUFIOEN | PWRMGMT1_VMIDSEL_500K);
/* lower the VMID power consumption */
wmcodec_write(BIASCTRL, 0);
audiohw_mute(false);
}
@ -223,9 +239,19 @@ void audiohw_close(void)
{
audiohw_mute(true);
/* Disable Thermal shutdown */
wmcodec_write(OUTCTRL, OUTCTRL_HP_COM | OUTCTRL_VROI);
/* Enable VMIDTOG */
wmcodec_write(OUT4TOADC, OUT4TOADC_VMIDTOG);
/* Disable VMIDSEL and BUFIOEN */
wmcodec_write(PWRMGMT1, PWRMGMT1_PLLEN | PWRMGMT1_BIASEN
| PWRMGMT1_VMIDSEL_OFF);
/* Wait for VMID to discharge */
sleep(3*HZ/10);
/* Power off registers */
wmcodec_write(PWRMGMT2, 0);
wmcodec_write(PWRMGMT3, 0);
wmcodec_write(PWRMGMT1, 0);
wmcodec_write(PWRMGMT2, PWRMGMT2_SLEEP);
}
/* Note: Disable output before calling this function */