static void set_serial_descriptor(void)
{
unsigned char serial[16];
/* Align 32 digits right in the 40-digit serial number */
short* p = &usb_string_iSerial.wString[1];
int i;
ascodec_readbytes(AS3514_UID_0, 0x10, serial);
for(i = 0; i < 16; i++) {
*p++ = hex[(serial[i] >> 4) & 0xF];
*p++ = hex[(serial[i] >> 0) & 0xF];
}
usb_string_iSerial.bLength = 68;
}
/* Read 10-bit channel data */
unsigned short adc_read(int channel)
{
if ((unsigned)channel >= NUM_ADC_CHANNELS)
return 0;
/* Select channel */
ascodec_write(AS3514_ADC_0, (channel << 4));
unsigned char buf[2];
/* Read data */
if (ascodec_readbytes(AS3514_ADC_0, 2, buf) < 0)
return 0;
/* decode to 10-bit and return */
return (((buf[0] & 0x3) << 8) | buf[1]);
}
/* Read 10-bit channel data */
unsigned short adc_read(int channel)
{
unsigned short data = 0;
if ((unsigned)channel >= NUM_ADC_CHANNELS)
return 0;
ascodec_lock();
/* Select channel */
if (ascodec_write(AS3514_ADC_0, (channel << 4)) >= 0)
{
unsigned char buf[2];
/*
* The AS3514 ADC will trigger an interrupt when the conversion
* is finished, if the corresponding enable bit in IRQ_ENRD2
* is set.
* Previously the code did not wait and this apparently did
* not pose any problems, but this should be more correct.
* Without the wait the data read back may be completely or
* partially (first one of the two bytes) stale.
*/
ascodec_wait_adc_finished();
/* Read data */
if (ascodec_readbytes(AS3514_ADC_0, 2, buf) >= 0)
{
data = (((buf[0] & 0x3) << 8) | buf[1]);
}
}
ascodec_unlock();
return data;
}
/*
* Initialise the PP I2C and I2S.
*/
void audiohw_preinit(void)
{
/* read all reg values */
ascodec_readbytes(0x0, AS3514_NUM_AUDIO_REGS, as3514_regs);
#ifdef HAVE_AS3543
as3514_write(AS3514_AUDIOSET1, AUDIOSET1_DAC_on | AUDIOSET1_DAC_GAIN_on);
as3514_write(AS3514_AUDIOSET2, AUDIOSET2_HPH_QUALITY_LOW_POWER);
/* common ground on, delay playback unmuting when inserting headphones */
as3514_write(AS3514_AUDIOSET3, AUDIOSET3_HPCM_on | AUDIOSET3_HP_LONGSTART);
as3514_write(AS3543_DAC_IF, AS3543_DAC_INT_PLL);
/* Select Line 2 for FM radio */
as3514_set(AS3514_LINE_IN1_R, LINE_IN_R_LINE_SELECT);
/* Output SUM of microphone/line/DAC */
as3514_write(AS3514_HPH_OUT_R, HPH_OUT_R_HEADPHONES | HPH_OUT_R_HP_OUT_SUM);
#else
/* as3514/as3515 */
#if defined(SANSA_E200V2) || defined(SANSA_FUZE)
/* Set ADC off, mixer on, DAC on, line out on, line in off, mic off */
/* Turn on SUM, DAC */
as3514_write(AS3514_AUDIOSET1, AUDIOSET1_DAC_on | AUDIOSET1_LOUT_on |
AUDIOSET1_SUM_on);
#else
/* Set ADC off, mixer on, DAC on, line out off, line in off, mic off */
/* Turn on SUM, DAC */
as3514_write(AS3514_AUDIOSET1, AUDIOSET1_DAC_on | AUDIOSET1_SUM_on);
#endif /* SANSA_E200V2 || SANSA_FUZE */
/* Set BIAS on, DITH off, AGC off, IBR_DAC max reduction, LSP_LP on,
IBR_LSP max reduction (50%), taken from c200v2 OF
*/
as3514_write(AS3514_AUDIOSET2, AUDIOSET2_IBR_LSP_50 | AUDIOSET2_LSP_LP |
AUDIOSET2_IBR_DAC_50 | AUDIOSET2_AGC_off | AUDIOSET2_DITH_off );
/* Mute and disable speaker */
as3514_write(AS3514_LSP_OUT_R, LSP_OUT_R_SP_OVC_TO_256MS | 0x00);
as3514_write(AS3514_LSP_OUT_L, LSP_OUT_L_SP_MUTE | 0x00);
#ifdef PHILIPS_SA9200
/* LRCK 8-23kHz (there are audible clicks while reading the ADC otherwise) */
as3514_write(AS3514_PLLMODE, PLLMODE_LRCK_8_23);
#else
/* LRCK 24-48kHz */
as3514_write(AS3514_PLLMODE, PLLMODE_LRCK_24_48);
#endif /* PHILIPS_SA9200 */
/* Set headphone over-current to 0, Min volume */
as3514_write(AS3514_HPH_OUT_R, HPH_OUT_R_HP_OVC_TO_0MS | 0x00);
/* AMS Sansas based on the AS3525 need HPCM enabled, otherwise they output the
L-R signal on both L and R headphone outputs instead of normal stereo.
Turning it off saves a little power on targets that don't need it. */
#if (CONFIG_CPU == AS3525)
/* Set HPCM on, ZCU off, reduce bias current, settings taken from c200v2 OF
*/
as3514_write(AS3514_AUDIOSET3, AUDIOSET3_IBR_HPH | AUDIOSET3_ZCU_off);
#else
/* TODO: check if AS3525 settings save power on e200v1 or as3525v2 */
/* Set HPCM off, ZCU on */
as3514_write(AS3514_AUDIOSET3, AUDIOSET3_HPCM_off);
#endif /* CONFIG_CPU == AS3525 */
/* M2_Sup_off */
as3514_set(AS3514_MIC2_L, MIC2_L_M2_SUP_off);
#endif /* HAVE_AS3543 */
/* registers identical on as3514/as3515 and as3543 */
/* M1_Sup_off */
as3514_set(AS3514_MIC1_L, MIC1_L_M1_SUP_off);
/* Headphone ON, MUTE, Min volume */
as3514_write(AS3514_HPH_OUT_L, HPH_OUT_L_HP_ON | HPH_OUT_L_HP_MUTE | 0x00);
#if defined(SANSA_E200V2) || defined(SANSA_FUZE)
/* Line Out Stereo, MUTE, Min volume */
as3514_write(AS3514_LINE_OUT_L, LINE_OUT_L_LO_SES_DM_SE_ST |
LINE_OUT_L_LO_SES_DM_MUTE | 0x00);
#endif /* SANSA_E200V2 || SANSA_FUZE */
/* DAC_Mute_off */
as3514_set(AS3514_DAC_L, DAC_L_DAC_MUTE_off);
}