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libboard: complete but undebugged support for HMC830/7043 programming

This commit is contained in:
Sebastien Bourdeauducq 2017-09-06 10:46:02 +08:00
parent 4baf17cebe
commit 33f053cff8
1 changed files with 148 additions and 3 deletions

View File

@ -1,6 +1,151 @@
include!(concat!(env!("OUT_DIR"), "/hmc7043_writes.rs"));
/*
* HMC830 config:
* 100MHz input, 1GHz output
* fvco = (refclk / r_divider) * n_divider
* fout = fvco/2
*
* HMC7043 config:
* dac clock: 1GHz (div=1)
* fpga clock: 250MHz (div=4)
* sysref clock: 15.625MHz (div=64)
*/
mod hmc830 {
use csr;
const HMC830_WRITES: [(u8, u32); 16] = [
(0x0, 0x20),
(0x1, 0x2),
(0x2, 0x2), // r_divider
(0x5, 0x1628),
(0x5, 0x60a0),
(0x5, 0xe110),
(0x5, 0x2818),
(0x5, 0x0),
(0x6, 0x303ca),
(0x7, 0x14d),
(0x8, 0xc1beff),
(0x9, 0x153fff),
(0xa, 0x2046),
(0xb, 0x7c061),
(0xf, 0x81),
(0x3, 0x28), // n_divider
];
fn spi_setup() {
unsafe {
csr::converter_spi::offline_write(1);
csr::converter_spi::cs_polarity_write(0);
csr::converter_spi::clk_polarity_write(0);
csr::converter_spi::clk_phase_write(0);
csr::converter_spi::lsb_first_write(0);
csr::converter_spi::half_duplex_write(0);
csr::converter_spi::clk_div_write_write(8);
csr::converter_spi::clk_div_read_write(8);
csr::converter_spi::cs_write(1 << csr::CONFIG_CONVERTER_SPI_HMC830_CS);
csr::converter_spi::offline_write(0);
}
}
fn write(addr: u8, data: u32) {
let cmd = (0 << 6) | addr;
let val = ((cmd as u32) << 24) | data;
unsafe {
csr::converter_spi::xfer_len_write_write(32);
csr::converter_spi::xfer_len_read_write(0);
csr::converter_spi::data_write_write(val << (32-31));
while csr::converter_spi::pending_read() != 0 {}
while csr::converter_spi::active_read() != 0 {}
}
}
fn read(addr: u8) -> u32 {
let cmd = (1 << 6) | addr;
let val = (cmd as u32) << 24;
unsafe {
csr::converter_spi::xfer_len_write_write(7);
csr::converter_spi::xfer_len_read_write(25);
csr::converter_spi::data_write_write(val << (32-31));
while csr::converter_spi::pending_read() != 0 {}
while csr::converter_spi::active_read() != 0 {}
csr::converter_spi::data_read_read()
}
}
pub fn init() -> Result<(), &'static str> {
spi_setup();
let id = read(0);
if id != 0xa7975 {
error!("invalid HMC830 ID: 0x{:08x}", id);
return Err("invalid HMC830 identification");
}
for &(addr, data) in HMC830_WRITES.iter() {
write(addr, data);
}
Ok(())
}
}
mod hmc7043 {
use csr;
include!(concat!(env!("OUT_DIR"), "/hmc7043_writes.rs"));
fn spi_setup() {
unsafe {
csr::converter_spi::offline_write(1);
csr::converter_spi::cs_polarity_write(0);
csr::converter_spi::clk_polarity_write(0);
csr::converter_spi::clk_phase_write(0);
csr::converter_spi::lsb_first_write(0);
csr::converter_spi::half_duplex_write(1);
csr::converter_spi::clk_div_write_write(8);
csr::converter_spi::clk_div_read_write(8);
csr::converter_spi::cs_write(1 << csr::CONFIG_CONVERTER_SPI_HMC7043_CS);
csr::converter_spi::offline_write(0);
}
}
fn write(addr: u16, data: u8) {
let cmd = (0 << 15) | addr;
let val = ((cmd as u32) << 8) | data as u32;
unsafe {
csr::converter_spi::xfer_len_write_write(24);
csr::converter_spi::xfer_len_read_write(0);
csr::converter_spi::data_write_write(val << (32-24));
while csr::converter_spi::pending_read() != 0 {}
while csr::converter_spi::active_read() != 0 {}
}
}
fn read(addr: u16) -> u8 {
let cmd = (0 << 15) | addr;
let val = (cmd as u32) << 8;
unsafe {
csr::converter_spi::xfer_len_write_write(16);
csr::converter_spi::xfer_len_read_write(8);
csr::converter_spi::data_write_write(val << (32-24));
while csr::converter_spi::pending_read() != 0 {}
while csr::converter_spi::active_read() != 0 {}
csr::converter_spi::data_read_read() as u8
}
}
pub fn init() -> Result<(), &'static str> {
spi_setup();
let id = (read(0x78) as u32) << 16 | (read(0x79) as u32) << 8 | read(0x7a) as u32;
if id != 0xf17904 {
error!("invalid HMC7043 ID: 0x{:08x}", id);
return Err("invalid HMC7043 identification");
}
for &(addr, data) in HMC7043_WRITES.iter() {
write(addr, data);
}
Ok(())
}
}
pub fn init() -> Result<(), &'static str> {
error!("HMC830/7043 support is not implemented");
Ok(())
hmc830::init()?;
hmc7043::init()
}