/*
* TSC-specific code to read the ID eeprom on the mainboard and extract the
* unit's EUI-64 which gets translated into a MAC-48 for ethernet.
*/
static void
eeprom_init(void)
{
const uint32_t twiHz = 400000;
const uint32_t twiCkDiv = 1 << 16;
const uint32_t twiChDiv = ((at91_master_clock / twiHz) - 2) << 8;
const uint32_t twiClDiv = ((at91_master_clock / twiHz) - 2);
/*
* Set the TWCK and TWD lines for Periph A, no pullup, open-drain.
*/
at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
AT91C_PIO_PA25 | AT91C_PIO_PA26, 0);
at91_pio_gpio_high_z(AT91RM92_PIOA_BASE, AT91C_PIO_PA25, 1);
/*
* Enable TWI power (irq numbers are also device IDs for power)
*/
WR4HW(AT91RM92_PMC_BASE, PMC_PCER, 1u << AT91RM92_IRQ_TWI);
/*
* Disable TWI interrupts, reset device, enable Master mode,
* disable Slave mode, set the clock.
*/
WR4HW(AT91RM92_TWI_BASE, TWI_IDR, 0xffffffff);
WR4HW(AT91RM92_TWI_BASE, TWI_CR, TWI_CR_SWRST);
WR4HW(AT91RM92_TWI_BASE, TWI_CR, TWI_CR_MSEN | TWI_CR_SVDIS);
WR4HW(AT91RM92_TWI_BASE, TWI_CWGR, twiCkDiv | twiChDiv | twiClDiv);
}
static int
pinctrl_configure_pins(device_t bus, phandle_t cfgxref)
{
struct pinctrl_softc *sc;
struct pincfg *cfg, *cfgdata;
char name[32];
phandle_t node;
ssize_t npins;
int i;
sc = device_get_softc(bus);
node = OF_node_from_xref(cfgxref);
memset(name, 0, sizeof(name));
OF_getprop(node, "name", name, sizeof(name));
npins = OF_getencprop_alloc(node, "atmel,pins", sizeof(*cfgdata),
(void **)&cfgdata);
if (npins < 0) {
printf("We're doing it wrong %s\n", name);
return (ENXIO);
}
if (npins == 0)
return (0);
for (i = 0, cfg = cfgdata; i < npins; i++, cfg++) {
uint32_t pio;
pio = (0xfffffff & sc->ranges[0].bus) + 0x200 * cfg->unit;
printf("P%c%d %s %#x\n", cfg->unit + 'A', cfg->pin,
periphs[cfg->periph], cfg->flags);
switch (cfg->periph) {
case 0:
at91_pio_use_gpio(pio, 1u << cfg->pin);
at91_pio_gpio_pullup(pio, 1u << cfg->pin,
!!(cfg->flags & 1));
at91_pio_gpio_high_z(pio, 1u << cfg->pin,
!!(cfg->flags & 2));
at91_pio_gpio_set_deglitch(pio,
1u << cfg->pin, !!(cfg->flags & 4));
// at91_pio_gpio_pulldown(pio, 1u << cfg->pin,
// !!(cfg->flags & 8));
// at91_pio_gpio_dis_schmidt(pio,
// 1u << cfg->pin, !!(cfg->flags & 16));
break;
case 1:
at91_pio_use_periph_a(pio, 1u << cfg->pin, cfg->flags);
break;
case 2:
at91_pio_use_periph_b(pio, 1u << cfg->pin, cfg->flags);
break;
}
}
OF_prop_free(cfgdata);
return (0);
}
