forked from M-Labs/artiq
si5324: kasli support
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@ -1,5 +1,7 @@
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use core::result;
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use board::{csr, clock};
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use board::clock;
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#[cfg(not(si5324_soft_reset))]
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use board::csr;
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use i2c;
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type Result<T> = result::Result<T, &'static str>;
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@ -7,23 +9,27 @@ type Result<T> = result::Result<T, &'static str>;
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const BUSNO: u8 = 0;
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const ADDRESS: u8 = 0x68;
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#[cfg(any(soc_platform = "sayma_amc", soc_platform = "kc705"))]
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fn pca9548_select(address: u8, channel: u8) -> Result<()> {
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#[cfg(any(soc_platform = "kasli",
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soc_platform = "sayma_amc",
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soc_platform = "kc705"))]
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fn pca9548_select(address: u8, channels: u8) -> Result<()> {
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i2c::start(BUSNO).unwrap();
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if !i2c::write(BUSNO, (address << 1)).unwrap() {
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return Err("PCA9548 failed to ack write address")
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}
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if !i2c::write(BUSNO, 1 << channel).unwrap() {
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if !i2c::write(BUSNO, channels).unwrap() {
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return Err("PCA9548 failed to ack control word")
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}
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i2c::stop(BUSNO).unwrap();
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Ok(())
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}
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fn reset(en: bool) {
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unsafe {
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csr::si5324_rst_n::out_write(if en { 0 } else { 1 })
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}
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#[cfg(not(si5324_soft_reset))]
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fn hard_reset() {
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unsafe { csr::si5324_rst_n::out_write(0); }
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clock::spin_us(1_000);
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unsafe { csr::si5324_rst_n::out_write(1); }
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clock::spin_us(10_000);
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}
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// NOTE: the logical parameters DO NOT MAP to physical values written
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@ -127,6 +133,13 @@ fn ident() -> Result<u16> {
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Ok(((read(134)? as u16) << 8) | (read(135)? as u16))
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}
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#[cfg(si5324_soft_reset)]
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fn soft_reset() -> Result<()> {
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write(136, read(136)? | 0x80)?;
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clock::spin_us(10_000);
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Ok(())
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}
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fn has_xtal() -> Result<bool> {
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Ok((read(129)? & 0x01) == 0) // LOSX_INT=0
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}
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@ -154,20 +167,26 @@ fn monitor_lock() -> Result<()> {
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pub fn setup(settings: &FrequencySettings) -> Result<()> {
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let s = map_frequency_settings(settings)?;
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reset(true);
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clock::spin_us(1_000);
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reset(false);
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clock::spin_us(10_000);
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#[cfg(not(si5324_soft_reset))]
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hard_reset();
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#[cfg(soc_platform = "kc705")]
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pca9548_select(0x74, 7)?;
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#[cfg(soc_platform = "kasli")]
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{
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pca9548_select(0x70, 0)?;
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pca9548_select(0x71, 1 << 3)?;
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}
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#[cfg(soc_platform = "sayma_amc")]
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pca9548_select(0x70, 4)?;
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pca9548_select(0x70, 1 << 4)?;
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#[cfg(soc_platform = "kc705")]
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pca9548_select(0x74, 1 << 7)?;
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if ident()? != 0x0182 {
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return Err("Si5324 does not have expected product number");
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}
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#[cfg(si5324_soft_reset)]
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soft_reset()?;
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write(0, read(0)? | 0x40)?; // FREE_RUN=1
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write(2, (read(2)? & 0x0f) | (s.bwsel << 4))?;
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write(21, read(21)? & 0xfe)?; // CKSEL_PIN=0
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