Author: ian
Date: Tue Feb 11 21:13:37 2014
New Revision: 261779
URL: http://svnweb.freebsd.org/changeset/base/261779
Log:
Check in the "real" board_tsc4370 file in place of the stubbed out one.
Real means the one TSC / Symmetricom / Microsemi actually uses on their 4370
and other rm9200 boards. This code demonstrates a variety of useful things
board init code can do, including adjusting the master clock frequency.
Modified:
head/sys/arm/at91/board_tsc4370.c
Modified: head/sys/arm/at91/board_tsc4370.c
==============================================================================
--- head/sys/arm/at91/board_tsc4370.c Tue Feb 11 20:14:54 2014
(r261778)
+++ head/sys/arm/at91/board_tsc4370.c Tue Feb 11 21:13:37 2014
(r261779)
@@ -1,6 +1,7 @@
/*-
* Copyright (c) 2005-2008 Olivier Houchard. All rights reserved.
* Copyright (c) 2005-2012 Warner Losh. All rights reserved.
+ * Copyright (c) 2007-2014 Ian Lepore. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -24,45 +25,573 @@
* SUCH DAMAGE.
*/
+/*
+ * Board init code for the TSC4370, and all other current TSC mainboards.
+ */
+
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
-#include <machine/board.h>
+#include <arm/at91/at91_pioreg.h>
+#include <arm/at91/at91_piovar.h>
+#include <arm/at91/at91_pmcreg.h>
+#include <arm/at91/at91_pmcvar.h>
+#include <arm/at91/at91_twireg.h>
+#include <arm/at91/at91_usartreg.h>
#include <arm/at91/at91board.h>
#include <arm/at91/at91var.h>
-#include <arm/at91/at91rm92reg.h>
#include <arm/at91/at91rm9200var.h>
-#include <arm/at91/at91_piovar.h>
-#include <arm/at91/at91_pioreg.h>
+#include <arm/at91/at91rm92reg.h>
+#include <arm/at91/if_atereg.h>
+#include <machine/board.h>
+#include <machine/cpu.h>
+#include <machine/machdep.h>
+#include <net/ethernet.h>
+#include <sys/reboot.h>
+
+/*
+ * RD4HW()/WR4HW() read and write at91rm9200 hardware register space directly.
+ * They serve the same purpose as the RD4()/WR4() idiom you see in many
drivers,
+ * except that those translate to bus_space calls, but in this code we need to
+ * access the registers directly before the at91 bus_space stuff is set up.
+ */
+
+static inline uint32_t
+RD4HW(uint32_t devbase, uint32_t regoff)
+{
+ return *(volatile uint32_t *)(AT91_BASE + devbase + regoff);
+}
+
+static inline void
+WR4HW(uint32_t devbase, uint32_t regoff, uint32_t val)
+{
+ *(volatile uint32_t *)(AT91_BASE + devbase + regoff) = val;
+}
+
+#ifndef BAUD2DIVISOR
+#define BAUD2DIVISOR(b) \
+ ((((at91_master_clock * 10) / ((b) * 16)) + 5) / 10)
+#endif
+
+/*
+ * If doing an in-house build, use tsc_bootinfo.h which is shared with our
+ * custom boot2. Otherwise define some crucial bits of it here, enough to
allow
+ * this code to compile.
+ */
+#ifdef TSC_BUILD
+#include <machine/tsc_bootinfo.h>
+#else
+struct tsc_bootinfo {
+ uint32_t bi_size;
+ uint32_t bi_version;
+ uint32_t bi_flags; /* RB_xxxxx flags from sys/reboot.h */
+ char bi_rootdevname[64];
+};
+#define TSC_BOOTINFO_MAGIC 0x06C30000
+#endif
+
+static struct arm_boot_params boot_params;
+static struct tsc_bootinfo inkernel_bootinfo;
+
+/*
+ * Override the default boot param parser (supplied via weak linkage) with one
+ * that knows how to handle our custom tsc_bootinfo passed in from boot2.
+ */
+vm_offset_t
+parse_boot_param(struct arm_boot_params *abp)
+{
+
+ boot_params = *abp;
+
+ /*
+ * If the right magic is in r0 and a non-NULL pointer is in r1, then
+ * it's our bootinfo, copy it. The pointer in r1 is a physical address
+ * passed from boot2. This routine is called immediately upon entry to
+ * initarm() and is in very nearly the same environment as boot2. In
+ * particular, va=pa and we can safely copy the args before we lose easy
+ * access to the memory they're stashed in right now.
+ *
+ * Note that all versions of boot2 that we've ever shipped have put
+ * zeroes into r2 and r3. Maybe that'll be useful some day.
+ */
+ if (abp->abp_r0 == TSC_BOOTINFO_MAGIC && abp->abp_r1 != 0) {
+ inkernel_bootinfo = *(struct tsc_bootinfo *)(abp->abp_r1);
+ }
+
+ return fake_preload_metadata(abp);
+}
+
+/*
+ * 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;
+}
+
+/*
+ * 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));
+ }
+}
+
+/*
+ * 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
+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;
+}
+
+static int
+set_mac_from_idprom(void)
+{
+#define SIGNATURE_SIZE 4
+#define EETYPE_SIZE 2
+#define BSLENGTH_SIZE 2
+#define RAW_SIZE 52
+#define EUI64_SIZE 8
+#define BS_SIGNATURE 0x21706d69
+#define BSO_SIGNATURE 0x216f7362
+#define DEVOFFSET_BSO_SIGNATURE 0x20
+#define OFFSET_BS_SIGNATURE 0
+#define SIZE_BS_SIGNATURE SIGNATURE_SIZE
+#define OFFSET_EETYPE (OFFSET_BS_SIGNATURE + SIZE_BS_SIGNATURE)
+#define SIZE_EETYPE EETYPE_SIZE
+#define OFFSET_BOOTSECTSIZE (OFFSET_EETYPE + SIZE_EETYPE)
+#define SIZE_BOOTSECTSIZE BSLENGTH_SIZE
+#define OFFSET_RAW (OFFSET_BOOTSECTSIZE + SIZE_BOOTSECTSIZE)
+#define OFFSET_EUI64 (OFFSET_RAW + RAW_SIZE)
+#define EE_DEV_ADDR 0xA0 /* eeprom is AT24C256 at address 0xA0
*/
+
+ int status;
+ uint32_t dev_offset = 0;
+ uint32_t sig;
+ uint8_t eui64[EUI64_SIZE];
+ uint8_t eaddr[ETHER_ADDR_LEN];
+
+ eeprom_init();
+
+ /* Check for the boot section signature at offset 0. */
+ status = eeprom_read(EE_DEV_ADDR, OFFSET_BS_SIGNATURE, &sig,
sizeof(sig));
+ if (status == -1)
+ return -1;
+
+ if (sig != BS_SIGNATURE) {
+ /* Check for the boot section offset signature. */
+ status = eeprom_read(EE_DEV_ADDR,
+ DEVOFFSET_BSO_SIGNATURE, &sig, sizeof(sig));
+ if ((status == -1) || (sig != BSO_SIGNATURE))
+ return -1;
+
+ /* Read the device offset of the boot section structure. */
+ status = eeprom_read(EE_DEV_ADDR,
+ DEVOFFSET_BSO_SIGNATURE + sizeof(sig),
+ &dev_offset, sizeof(dev_offset));
+ if (status == -1)
+ return -1;;
+
+ /* Check for the boot section signature. */
+ status = eeprom_read(EE_DEV_ADDR,
+ dev_offset + OFFSET_BS_SIGNATURE, &sig, sizeof(sig));
+ if ((status == -1) || (sig != BS_SIGNATURE))
+ return -1;;
+ }
+ dev_offset += OFFSET_EUI64;
+
+ /* Read the EUI64 from the device. */
+ if (eeprom_read(EE_DEV_ADDR, dev_offset, eui64, sizeof(eui64)) == -1)
+ return -1;;
+
+ /* Transcribe the EUI-64 to a MAC-48.
+ *
+ * Given an EUI-64 of aa:bb:cc:dd:ee:ff:gg:hh
+ *
+ * if (ff is zero and ee is non-zero)
+ * mac is aa:bb:cc:ee:gg:hh
+ * else
+ * mac is aa:bb:cc:ff:gg:hh
+ *
+ * This logic fixes a glitch in our mfg process in which the ff byte was
+ * always zero and the ee byte contained a non-zero value. This
+ * resulted in duplicate MAC addresses because we discarded the ee byte.
+ * Now they've fixed the process so that the ff byte is non-zero and
+ * unique addresses are formed from the ff:gg:hh bytes. If the ff byte
+ * is zero, then we have a unit manufactured during the glitch era, and
+ * we fix the problem by grabbing the ee byte rather than the ff byte.
+ */
+ eaddr[0] = eui64[0];
+ eaddr[1] = eui64[1];
+ eaddr[2] = eui64[2];
+ eaddr[3] = eui64[5];
+ eaddr[4] = eui64[6];
+ eaddr[5] = eui64[7];
+
+ if (eui64[5] == 0 && eui64[4] != 0) {
+ eaddr[3] = eui64[4];
+ }
+
+ /*
+ * Set the address in the hardware regs where the ate driver
+ * looks for it.
+ */
+ WR4HW(AT91RM92_EMAC_BASE, ETH_SA1L,
+ (eaddr[3] << 24) | (eaddr[2] << 16) | (eaddr[1] << 8) | eaddr[0]);
+ WR4HW(AT91RM92_EMAC_BASE, ETH_SA1H,
+ (eaddr[5] << 8) | (eaddr[4]));
+
+ printf(
+ "ID: EUI-64 %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n"
+ " MAC-48 %02x:%02x:%02x:%02x:%02x:%02x\n"
+ " read from i2c device 0x%02X offset 0x%x\n",
+ eui64[0], eui64[1], eui64[2], eui64[3],
+ eui64[4], eui64[5], eui64[6], eui64[7],
+ eaddr[0], eaddr[1], eaddr[2],
+ eaddr[3], eaddr[4], eaddr[5],
+ EE_DEV_ADDR, dev_offset);
+
+ return (0);
+}
+
+/*
+ * Assign SPI chip select pins based on which chip selects are found in hints.
+ */
+static void
+assign_spi_pins(void)
+{
+ struct {
+ uint32_t num;
+ const char * name;
+ } chipsel_pins[] = {
+ { AT91C_PIO_PA3, "PA3", },
+ { AT91C_PIO_PA4, "PA4", },
+ { AT91C_PIO_PA5, "PA5", },
+ { AT91C_PIO_PA6, "PA6", },
+ };
+ int anchor = 0;
+ uint32_t chipsel_inuse = 0;
+
+ /*
+ * Search through all device hints looking for any that have
+ * ".at=spibus0". For each one found, ensure that there is also a
+ * chip select hint ".cs=<num>" and that <num> is 0-3, and assign the
+ * corresponding pin to the SPI peripheral. Whine if we find a SPI
+ * device with a missing or invalid chipsel hint.
+ */
+ for (;;) {
+ const char * rName = "";
+ int unit = 0;
+ int cs = 0;
+ int ret;
+
+ ret = resource_find_match(&anchor, &rName, &unit, "at",
"spibus0");
+ if (ret != 0)
+ break;
+
+ ret = resource_int_value(rName, unit, "cs", &cs);
+ if (ret != 0) {
+ printf( "Error: hint for SPI device %s%d "
+ "without a chip select hint; "
+ "device will not function.\n",
+ rName, unit);
+ continue;
+ }
+ if (cs < 0 || cs > 3) {
+ printf( "Error: hint for SPI device %s%d "
+ "contains an invalid chip select "
+ "value: %d\n",
+ rName, unit, cs);
+ continue;
+ }
+ if (chipsel_inuse & (1 << cs)) {
+ printf( "Error: hint for SPI device %s%d "
+ "specifies chip select %d, which "
+ "is already used by another device\n",
+ rName, unit, cs);
+ continue;
+ }
+ chipsel_inuse |= 1 << cs;
+ at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
+ chipsel_pins[cs].num, 1);
+ printf( "Configured pin %s as SPI chip "
+ "select %d for %s%d\n",
+ chipsel_pins[cs].name, cs, rName, unit);
+ }
+
+ /*
+ * If there were hints for any SPI devices, assign the basic SPI IO pins
+ * and enable SPI power (irq numbers are also device IDs for power).
+ */
+ if (chipsel_inuse != 0) {
+ at91_pio_use_periph_a(AT91RM92_PIOA_BASE,
+ AT91C_PIO_PA1 | AT91C_PIO_PA0 | AT91C_PIO_PA2, 0);
+ WR4HW(AT91RM92_PMC_BASE, PMC_PCER, 1u << AT91RM92_IRQ_SPI);
+ }
+}
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;
+ }
- at91rm9200_set_subtype(AT91_ST_RM9200_PQFP);
+ /*
+ * 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 */
- at91rm9200_config_mci(0); /* tsc4370 board has
only 1 wire */
- /* Newer boards may
have 4 wires */
+ /*
+ * 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);
+ }
- /* Configure TWI */
- /* Configure SPI + dataflash */
- /* Configure SSC */
- /* Configure USB Host */
- /* Configure FPGA attached to chip selects */
-
- /* Pin assignment */
- /* Assert PA24 low -- talk to rubidium */
- at91_pio_use_gpio(AT91RM92_PIOA_BASE, AT91C_PIO_PA24);
- at91_pio_gpio_output(AT91RM92_PIOA_BASE, AT91C_PIO_PA24, 0);
- at91_pio_gpio_clear(AT91RM92_PIOA_BASE, AT91C_PIO_PA24);
+ /*
+ * 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);
@@ -70,3 +599,4 @@ board_init(void)
}
ARM_BOARD(NONE, "TSC4370 Controller Board");
+
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