Пример #1
0
/* only works for channels <=7, always divide by 2, never accumulates */
static inline void __attribute__((always_inline)) setup_lradc(int src)
{
    BF_CLR(LRADC_CTRL0, SFTRST);
    BF_CLR(LRADC_CTRL0, CLKGATE);
    /* don't bother changing the source, we are early enough at boot so that
     * channel x is mapped to source x */
    HW_LRADC_CHn_CLR(src) = BM_OR2(LRADC_CHn, NUM_SAMPLES, ACCUMULATE);
    BF_SETV(LRADC_CTRL2, DIVIDE_BY_TWO, 1 << src);
}
Пример #2
0
static inline void __attribute__((noreturn)) power_down()
{
#ifdef SANSA_FUZEPLUS
    /* B0P09: this pin seems to be important to shutdown the hardware properly */
    HW_PINCTRL_MUXSELn_SET(0) = 3 << 18;
    HW_PINCTRL_DOEn(0) = 1 << 9;
    HW_PINCTRL_DOUTn(0) = 1 << 9;
#endif
    /* power down */
    HW_POWER_RESET = BM_OR2(POWER_RESET, UNLOCK, PWD);
    while(1);
}
Пример #3
0
void imx233_audioout_preinit(void)
{

    /* Enable AUDIOOUT block */
    imx233_reset_block(&HW_AUDIOOUT_CTRL);
    /* Enable digital filter clock */
    imx233_clkctrl_enable(CLK_FILT, true);
    /* Enable DAC */
    BF_CLR(AUDIOOUT_ANACLKCTRL, CLKGATE);
    /* Set capless mode */
#if IMX233_AUDIO_COUPLING_MODE == ACM_CAP
    BF_SET(AUDIOOUT_PWRDN, CAPLESS);
#else
    BF_CLR(AUDIOOUT_PWRDN, CAPLESS);
#endif
    /* Set word-length to 16-bit */
    BF_SET(AUDIOOUT_CTRL, WORD_LENGTH);
    /* Power up DAC */
    BF_CLR(AUDIOOUT_PWRDN, DAC);
    /* Hold HP to ground to avoid pop, then release and power up HP */
    BF_SET(AUDIOOUT_ANACTRL, HP_HOLD_GND);
    BF_CLR(AUDIOOUT_PWRDN, HEADPHONE);
    /* Set HP mode to AB */
    BF_SET(AUDIOOUT_ANACTRL, HP_CLASSAB);
    /* change bias to -50% */
    BF_WR(AUDIOOUT_TEST, HP_I1_ADJ, 1);
    BF_WR(AUDIOOUT_REFCTRL, BIAS_CTRL, 1);
#if IMX233_SUBTARGET >= 3700
    BF_SET(AUDIOOUT_REFCTRL, RAISE_REF);
#endif
    BF_SET(AUDIOOUT_REFCTRL, XTAL_BGR_BIAS);
    /* Stop holding to ground */
    BF_CLR(AUDIOOUT_ANACTRL, HP_HOLD_GND);
    /* Set dmawait count to 31 (see errata, workaround random stop) */
    BF_WR(AUDIOOUT_CTRL, DMAWAIT_COUNT, 31);
    /* start converting audio */
    BF_SET(AUDIOOUT_CTRL, RUN);
    /* unmute DAC */
    HW_AUDIOOUT_DACVOLUME_CLR = BM_OR2(AUDIOOUT_DACVOLUME, MUTE_LEFT, MUTE_RIGHT);
    /* send a few samples to avoid pop */
    HW_AUDIOOUT_DATA = 0;
    HW_AUDIOOUT_DATA = 0;
    HW_AUDIOOUT_DATA = 0;
    HW_AUDIOOUT_DATA = 0;
}
Пример #4
0
void imx233_audioout_close(void)
{
    /* Switch to class A */
    BF_CLR(AUDIOOUT_ANACTRL, HP_CLASSAB);
    /* Hold HP to ground */
    BF_SET(AUDIOOUT_ANACTRL, HP_HOLD_GND);
    /* Mute HP and power down */
    BF_SET(AUDIOOUT_HPVOL, MUTE);
    /* Power down HP */
    BF_SET(AUDIOOUT_PWRDN, HEADPHONE);
    /* Mute DAC */
    HW_AUDIOOUT_DACVOLUME_SET = BM_OR2(AUDIOOUT_DACVOLUME, MUTE_LEFT, MUTE_RIGHT);
    /* Power down DAC */
    BF_SET(AUDIOOUT_PWRDN, DAC);
    /* Gate off DAC */
    BF_SET(AUDIOOUT_ANACLKCTRL, CLKGATE);
    /* Disable digital filter clock */
    imx233_clkctrl_enable(CLK_FILT, false);
    /* will also gate off the module */
    BF_CLR(AUDIOOUT_CTRL, RUN);
}