void
at91_ebi_disable(int bank)
{
WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, ~(1 << bank) &
RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA));
}
void
at91_ebi_enable(int bank)
{
WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, (1 << bank) |
RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA));
}
/*
* Allow the master clock frequency to be changed from whatever the bootloader
* set up, because sometimes it's harder to change/update a bootloader than it
* is to change/update the kernel once a product is in the field.
*/
static void
master_clock_init(void)
{
uint32_t mckr = RD4HW(AT91RM92_PMC_BASE, PMC_MCKR);
int hintvalue = 0;
int newmckr = 0;
/*
* If there's a hint that specifies the contents of MCKR, use it
* without question (it had better be right).
*
* If there's a "mckfreq" hint it might be in hertz or mhz (convert the
* latter to hz). Calculate the new MCK divider. If the CPU frequency
* is not a sane multiple of the hinted MCK frequency this is likely to
* behave badly. The moral is: don't hint at impossibilities.
*/
if (resource_int_value("at91", 0, "mckr", &hintvalue) == 0) {
newmckr = hintvalue;
} else {
hintvalue = 90; /* Default to 90mhz if not specified. */
resource_int_value("at91", 0, "mckfreq", &hintvalue);
if (hintvalue != 0) {
if (hintvalue < 1000)
hintvalue *= 1000000;
if (hintvalue != at91_master_clock) {
uint32_t divider;
struct at91_pmc_clock * cpuclk;
cpuclk = at91_pmc_clock_ref("cpu");
divider = (cpuclk->hz / hintvalue) - 1;
newmckr = (mckr & 0xFFFFFCFF) | ((divider & 0x03) << 8);
at91_pmc_clock_deref(cpuclk);
}
}
}
/* If the new mckr value is different than what's in the register now,
* make the change and wait for the clocks to settle (MCKRDY status).
*
* MCKRDY will never be asserted unless either the selected clock or the
* prescaler value changes (but not both at once) [this is detailed in
* the rm9200 errata]. This code assumes the prescaler value is always
* zero and that by time we get to here we're running on something other
* than the slow clock, so to change the mckr divider we first change
* back to the slow clock (keeping prescaler and divider unchanged),
* then go back to the original selected clock with the new divider.
*
* After changing MCK, go re-init everything clock-related, and reset
* the baud rate generator for the console (doing this here is kind of a
* rude hack, but hey, you do what you have to to run MCK faster).
*/
if (newmckr != 0 && newmckr != mckr) {
if (mckr & 0x03)
change_mckr(mckr & ~0x03);
change_mckr(newmckr);
at91_pmc_init_clock();
WR4HW(AT91RM92_DBGU_BASE, USART_BRGR, BAUD2DIVISOR(115200));
}
}
/*
* Change the master clock config and wait for it to stabilize.
*/
static void
change_mckr(uint32_t mckr)
{
int i;
WR4HW(AT91RM92_PMC_BASE, PMC_MCKR, mckr);
for (i = 0; i < 1000; ++i)
if ((RD4HW(AT91RM92_PMC_BASE, PMC_SR) & PMC_IER_MCKRDY))
return;
}
static int
eeprom_read(uint32_t EE_DEV_ADDR, uint32_t ee_off, void * buf, uint32_t size)
{
uint8_t *bufptr = (uint8_t *)buf;
uint32_t status;
uint32_t count;
/* Clean out any old status and received byte. */
status = RD4HW(AT91RM92_TWI_BASE, TWI_SR);
status = RD4HW(AT91RM92_TWI_BASE, TWI_RHR);
/* Set the TWI Master Mode Register */
WR4HW(AT91RM92_TWI_BASE, TWI_MMR,
TWI_MMR_DADR(EE_DEV_ADDR) | TWI_MMR_IADRSZ(2) | TWI_MMR_MREAD);
/* Set TWI Internal Address Register */
WR4HW(AT91RM92_TWI_BASE, TWI_IADR, ee_off);
/* Start transfer */
WR4HW(AT91RM92_TWI_BASE, TWI_CR, TWI_CR_START);
status = RD4HW(AT91RM92_TWI_BASE, TWI_SR);
while (size-- > 1){
/* Wait until Receive Holding Register is full */
count = 1000000;
while (!(RD4HW(AT91RM92_TWI_BASE, TWI_SR) & TWI_SR_RXRDY) &&
--count != 0)
continue;
if (count <= 0)
return -1;
/* Read and store byte */
*bufptr++ = (uint8_t)RD4HW(AT91RM92_TWI_BASE, TWI_RHR);
}
WR4HW(AT91RM92_TWI_BASE, TWI_CR, TWI_CR_STOP);
status = RD4HW(AT91RM92_TWI_BASE, TWI_SR);
/* Wait until transfer is finished */
while (!(RD4HW(AT91RM92_TWI_BASE, TWI_SR) & TWI_SR_TXCOMP))
continue;
/* Read last byte */
*bufptr = (uint8_t)RD4HW(AT91RM92_TWI_BASE, TWI_RHR);
return 0;
}
BOARD_INIT long
board_init(void)
{
int is_bga, rev_mii;
/*
* Deal with bootinfo (if any) passed in from the boot2 bootloader and
* copied to the static inkernel_bootinfo earlier in the init. Do this
* early so that bootverbose is set from this point on.
*/
if (inkernel_bootinfo.bi_size > 0 &&
(inkernel_bootinfo.bi_flags & RB_BOOTINFO)) {
struct tsc_bootinfo *bip = &inkernel_bootinfo;
printf("TSC_BOOTINFO: size %u howtoflags=0x%08x rootdev='%s'\n",
bip->bi_size, bip->bi_flags, bip->bi_rootdevname);
boothowto = bip->bi_flags;
bootverbose = (boothowto & RB_VERBOSE);
if (bip->bi_rootdevname[0] != 0)
rootdevnames[0] = bip->bi_rootdevname;
}
/*
* The only way to know if we're in a BGA package (and thus have PIOD)
* is to be told via a hint; there's nothing detectable in the silicon.
* This is esentially an rm92-specific extension to getting the chip ID
* (which was done by at91_machdep just before calling this routine).
* If it is the BGA package, enable the clock for PIOD.
*/
is_bga = 0;
resource_int_value("at91", 0, "is_bga_package", &is_bga);
if (is_bga)
WR4HW(AT91RM92_PMC_BASE, PMC_PCER, 1u << AT91RM92_IRQ_PIOD);
#if __FreeBSD_version >= 1000000
at91rm9200_set_subtype(is_bga ? AT91_ST_RM9200_BGA :
AT91_ST_RM9200_PQFP);
#endif
/*
* Go reprogram the MCK frequency based on hints.
*/
master_clock_init();
/*
* Configure UARTs.
*/
at91rm9200_config_uart(AT91_ID_DBGU, 0, 0); /* DBGU just Tx and Rx */
at91rm9200_config_uart(AT91RM9200_ID_USART0, 1, 0); /* Tx and Rx */
at91rm9200_config_uart(AT91RM9200_ID_USART1, 2, 0); /* Tx and Rx */
at91rm9200_config_uart(AT91RM9200_ID_USART2, 3, 0); /* Tx and Rx */
at91rm9200_config_uart(AT91RM9200_ID_USART3, 4, 0); /* Tx and Rx */
/*
* Configure MCI (sdcard)
*/
at91rm9200_config_mci(0);
/*
* Assign the pins needed by the emac device, and power it up. Also,
* configure it for RMII operation unless the 'revmii_mode' hint is set,
* in which case configure the full set of MII pins. The revmii_mode
* hint is for so-called reverse-MII, used for connections to a Broadcom
* 5325E switch on some boards. Note that order is important here:
* configure pins, then power on the device, then access the device's
* config registers.
*/
rev_mii = 0;
resource_int_value("ate", 0, "phy_revmii_mode", &rev_mii);
at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
AT91C_PIO_PA7 | AT91C_PIO_PA8 | AT91C_PIO_PA9 |
AT91C_PIO_PA10 | AT91C_PIO_PA11 | AT91C_PIO_PA12 |
AT91C_PIO_PA13 | AT91C_PIO_PA14 | AT91C_PIO_PA15 |
AT91C_PIO_PA16, 0);
if (rev_mii) {
at91_pio_use_periph_b(AT91RM92_PIOB_BASE,
AT91C_PIO_PB12 | AT91C_PIO_PB13 | AT91C_PIO_PB14 |
AT91C_PIO_PB15 | AT91C_PIO_PB16 | AT91C_PIO_PB17 |
AT91C_PIO_PB18 | AT91C_PIO_PB19, 0);
}
WR4HW(AT91RM92_PMC_BASE, PMC_PCER, 1u << AT91RM92_IRQ_EMAC);
if (!rev_mii) {
WR4HW(AT91RM92_EMAC_BASE, ETH_CFG,
RD4HW(AT91RM92_EMAC_BASE, ETH_CFG) | ETH_CFG_RMII);
}
/*
* Get our ethernet MAC address from the ID eeprom.
* Configures TWI as a side effect.
*/
set_mac_from_idprom();
/*
* Configure SPI
*/
assign_spi_pins();
/*
* Configure SSC
*/
at91_pio_use_periph_a(
AT91RM92_PIOB_BASE,
AT91C_PIO_PB6 | AT91C_PIO_PB7 | AT91C_PIO_PB8 | /* transmit */
AT91C_PIO_PB9 | AT91C_PIO_PB10 | AT91C_PIO_PB11, /* receive */
0); /* no pullup */
/*
* We're using TC1's A1 input for PPS measurements that drive the
* kernel PLL and our NTP refclock. On some old boards we route a 5mhz
* signal to TC1's A2 input (pin PA21), but we have never used that
* clock (it rolls over too fast for hz=100), and now newer boards are
* using pin PA21 as a CTS0 for USART1, so we no longer assign it to
* the timer block like we used to here.
*/
at91_pio_use_periph_b(AT91RM92_PIOA_BASE, AT91C_PIO_PA19, 0);
/*
* Configure pins used to bitbang-upload the firmware to the main FPGA.
*/
at91_pio_use_gpio(AT91RM92_PIOB_BASE,
AT91C_PIO_PB16 | AT91C_PIO_PB17 | AT91C_PIO_PB18 | AT91C_PIO_PB19);
return (at91_ramsize());
}
