static void
spiinit(void)
{
spi.regs = (Spiregs*)SPIREGS;
spi.regs->clkdiv = 250; /* 1 MHz */
gpiosel(SPI0_MISO, Alt0);
gpiosel(SPI0_MOSI, Alt0);
gpiosel(SPI0_SCLK, Alt0);
gpiosel(SPI0_CE0_N, Alt0);
gpiosel(SPI0_CE1_N, Alt0);
}
static void
i2cinit(void)
{
i2c.regs = (Bsc*)I2CREGS;
i2c.regs->clkdiv = 2500;
gpiosel(SDA0Pin, Alt0);
gpiosel(SCL0Pin, Alt0);
gpiopullup(SDA0Pin);
gpiopullup(SCL0Pin);
intrenable(IRQi2c, i2cinterrupt, 0, 0, "i2c");
}
void
okay(int on)
{
static int first;
static int okled, polarity;
char *p;
if(!first++){
p = getconf("bcm2709.disk_led_gpio");
if(p == nil)
p = getconf("bcm2708.disk_led_gpio");
if(p != nil)
okled = strtol(p, 0, 0);
else
okled = 'v';
p = getconf("bcm2709.disk_led_active_low");
if(p == nil)
p = getconf("bcm2708.disk_led_active_low");
polarity = (p == nil || *p == '1');
if(okled != 'v')
gpiosel(okled, Output);
}
if(okled == 'v')
vgpset(0, on);
else if(okled != 0)
gpioout(okled, on^polarity);
}
void
okay(int on)
{
static int first;
if(!first++)
gpiosel(OkLed, Output);
gpioout(OkLed, !on);
}
static void
enable(Uart *uart, int ie)
{
u32int *ap;
ap = (u32int*)uart->regs;
delay(10);
gpiosel(TxPin, Alt5);
gpiosel(RxPin, Alt5);
gpiopulloff(TxPin);
gpiopulloff(RxPin);
ap[Enables] |= UartEn;
ap[MuIir] = 6;
ap[MuLcr] = Bits8;
ap[MuCntl] = TxEn|RxEn;
ap[MuBaud] = 250000000/(115200*8) - 1;
if(ie){
intrenable(IRQaux, interrupt, uart, 0, "uart");
ap[MuIer] = RxIen|TxIen;
}else
ap[MuIer] = 0;
}
