forked from M-Labs/artiq
firmware: I2C I/O expander support
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@ -0,0 +1,101 @@
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use i2c;
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pub struct IoExpander {
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busno: u8,
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port: u8,
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address: u8,
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virtual_led_mapping: &'static [(u8, u8, u8)],
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out_current: [u8; 2],
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out_target: [u8; 2],
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}
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impl IoExpander {
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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pub fn new(index: u8) -> Self {
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const VIRTUAL_LED_MAPPING0: [(u8, u8, u8); 2] = [(0, 0, 6), (1, 1, 6)];
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const VIRTUAL_LED_MAPPING1: [(u8, u8, u8); 2] = [(2, 0, 6), (3, 1, 6)];
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// Both expanders on SHARED I2C bus
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match index {
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0 => IoExpander {
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busno: 0,
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port: 11,
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address: 0x40,
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virtual_led_mapping: &VIRTUAL_LED_MAPPING0,
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out_current: [0; 2],
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out_target: [0; 2],
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},
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1 => IoExpander {
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busno: 0,
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port: 11,
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address: 0x42,
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virtual_led_mapping: &VIRTUAL_LED_MAPPING1,
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out_current: [0; 2],
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out_target: [0; 2],
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},
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_ => panic!("incorrect I/O expander index"),
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}
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}
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#[cfg(soc_platform = "kasli")]
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fn select(&self) -> Result<(), &'static str> {
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let mask: u16 = 1 << self.port;
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i2c::pca9548_select(self.busno, 0x70, mask as u8)?;
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i2c::pca9548_select(self.busno, 0x71, (mask >> 8) as u8)?;
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Ok(())
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}
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fn write(&self, addr: u8, value: u8) -> Result<(), &'static str> {
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i2c::start(self.busno)?;
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i2c::write(self.busno, self.address)?;
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i2c::write(self.busno, addr)?;
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i2c::write(self.busno, value)?;
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i2c::stop(self.busno)?;
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Ok(())
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}
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pub fn init(&mut self) -> Result<(), &'static str> {
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self.select()?;
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let mut iodir = [0xffu8; 2];
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for (_led, port, bit) in self.virtual_led_mapping.iter() {
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iodir[*port as usize] &= !(1 << *bit);
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}
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self.write(0x00, iodir[0])?;
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self.write(0x01, iodir[1])?;
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self.out_current[0] = 0x00;
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self.write(0x12, 0x00)?;
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self.out_current[1] = 0x00;
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self.write(0x13, 0x00)?;
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Ok(())
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}
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pub fn set(&mut self, port: u8, bit: u8, high: bool) {
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if high {
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self.out_target[port as usize] |= 1 << bit;
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} else {
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self.out_target[port as usize] &= !(1 << bit);
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}
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}
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pub fn service(&mut self) -> Result<(), &'static str> {
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for (led, port, bit) in self.virtual_led_mapping.iter() {
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// TODO: get level from gateware
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self.set(*port, *bit, false);
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}
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if self.out_target != self.out_current {
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self.select()?;
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if self.out_target[0] != self.out_current[0] {
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self.write(0x12, self.out_target[0])?;
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self.out_current[0] = self.out_target[0];
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}
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if self.out_target[1] != self.out_current[1] {
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self.write(0x13, self.out_target[1])?;
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self.out_current[1] = self.out_target[1];
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}
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}
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Ok(())
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}
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}
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@ -37,6 +37,8 @@ pub mod ethmac;
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pub mod i2c;
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#[cfg(soc_platform = "kasli")]
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pub mod i2c_eeprom;
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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pub mod io_expander;
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#[cfg(all(has_ethmac, feature = "smoltcp"))]
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pub mod net_settings;
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#[cfg(has_slave_fpga_cfg)]
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@ -99,6 +99,15 @@ fn startup() {
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setup_log_levels();
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#[cfg(has_i2c)]
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board_misoc::i2c::init().expect("I2C initialization failed");
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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let (mut io_expander0, mut io_expander1);
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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{
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io_expander0 = board_misoc::io_expander::IoExpander::new(0);
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io_expander1 = board_misoc::io_expander::IoExpander::new(1);
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io_expander0.init().expect("I2C I/O expander #0 initialization failed");
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io_expander1.init().expect("I2C I/O expander #1 initialization failed");
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}
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rtio_clocking::init();
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let mut net_device = unsafe { ethmac::EthernetDevice::new() };
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@ -210,6 +219,12 @@ fn startup() {
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if let Some(_net_stats_diff) = net_stats.update() {
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debug!("ethernet mac:{}", ethmac::EthernetStatistics::new());
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}
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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{
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io_expander0.service().expect("I2C I/O expander #0 service failed");
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io_expander1.service().expect("I2C I/O expander #1 service failed");
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}
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}
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}
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@ -454,13 +454,23 @@ pub extern fn main() -> i32 {
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info!("software ident {}", csr::CONFIG_IDENTIFIER_STR);
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info!("gateware ident {}", ident::read(&mut [0; 64]));
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#[cfg(has_si5324)]
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#[cfg(has_i2c)]
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i2c::init().expect("I2C initialization failed");
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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let (mut io_expander0, mut io_expander1);
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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{
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i2c::init().expect("I2C initialization failed");
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si5324::setup(&SI5324_SETTINGS, si5324::Input::Ckin1).expect("cannot initialize Si5324");
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io_expander0 = board_misoc::io_expander::IoExpander::new(0);
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io_expander1 = board_misoc::io_expander::IoExpander::new(1);
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io_expander0.init().expect("I2C I/O expander #0 initialization failed");
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io_expander1.init().expect("I2C I/O expander #1 initialization failed");
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}
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#[cfg(has_si5324)]
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si5324::setup(&SI5324_SETTINGS, si5324::Input::Ckin1).expect("cannot initialize Si5324");
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#[cfg(has_wrpll)]
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wrpll::init();
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unsafe {
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csr::drtio_transceiver::stable_clkin_write(1);
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}
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@ -507,6 +517,11 @@ pub extern fn main() -> i32 {
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for mut rep in repeaters.iter_mut() {
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rep.service(&routing_table, rank);
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}
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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{
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io_expander0.service().expect("I2C I/O expander #0 service failed");
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io_expander1.service().expect("I2C I/O expander #1 service failed");
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}
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hardware_tick(&mut hardware_tick_ts);
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}
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@ -531,6 +546,11 @@ pub extern fn main() -> i32 {
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for mut rep in repeaters.iter_mut() {
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rep.service(&routing_table, rank);
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}
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#[cfg(all(soc_platform = "kasli", hw_rev = "v2.0"))]
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{
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io_expander0.service().expect("I2C I/O expander #0 service failed");
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io_expander1.service().expect("I2C I/O expander #1 service failed");
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}
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hardware_tick(&mut hardware_tick_ts);
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if drtiosat_tsc_loaded() {
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info!("TSC loaded from uplink");
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