zynq-rs/libboard_zynq/src/i2c/regs.rs

106 lines
3.6 KiB
Rust
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use libregister::{
register, register_at,
register_bit, register_bits
};
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// With reference to:
//
// artiq:artiq/gateware/targets/kasli.py:
// self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
//
// misoc:misoc/cores/gpio.py:
// class GPIOTristate(Module, AutoCSR):
// def __init__(self, signals, reset_out=0, reset_oe=0):
// l = len(signals)
// self._in = CSRStatus(l)
// self._out = CSRStorage(l, reset=reset_out)
// self._oe = CSRStorage(l, reset=reset_oe)
//
// Hence, using GPIOs as SCL and SDA GPIOs respectively.
//
// Current compatibility:
// zc706: GPIO 50, 51 == SCL, SDA
// kasli_soc: GPIO 50, 51 == SCL, SDA
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pub struct RegisterBlock {
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pub gpio_output_mask: &'static mut GPIOOutputMask,
pub gpio_input: &'static mut GPIOInput,
pub gpio_direction: &'static mut GPIODirection,
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pub gpio_output_enable: &'static mut GPIOOutputEnable,
}
impl RegisterBlock {
pub fn i2c() -> Self {
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Self {
gpio_output_mask: GPIOOutputMask::new(),
gpio_input: GPIOInput::new(),
gpio_direction: GPIODirection::new(),
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gpio_output_enable: GPIOOutputEnable::new()
}
}
}
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register!(gpio_output_mask,
/// MASK_DATA_1_MSW:
/// Maskable output data for MIO[53:48]
GPIOOutputMask, RW, u32);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
register_at!(GPIOOutputMask, 0xE000A00C, new);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bit!(gpio_output_mask,
/// Output for SCL
scl_o, 2);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bit!(gpio_output_mask,
/// Output for SDA
sda_o, 3);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bits!(gpio_output_mask,
/// Mask for keeping bits except SCL and SDA unchanged
mask, u16, 16, 31);
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register!(gpio_input,
/// DATA_1_RO:
/// Input data for MIO[53:32]
GPIOInput, RO, u32);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
register_at!(GPIOInput, 0xE000A064, new);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bit!(gpio_input,
/// Input for SCL
scl, 18);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bit!(gpio_input,
/// Input for SDA
sda, 19);
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register!(gpio_direction,
/// DIRM_1:
/// Direction mode for MIO[53:32]; 0/1 = in/out
GPIODirection, RW, u32);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
register_at!(GPIODirection, 0xE000A244, new);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bit!(gpio_direction,
/// Direction for SCL
scl, 18);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bit!(gpio_direction,
/// Direction for SDA
sda, 19);
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register!(gpio_output_enable,
/// OEN_1:
/// Output enable for MIO[53:32]
GPIOOutputEnable, RW, u32);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
register_at!(GPIOOutputEnable, 0xE000A248, new);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bit!(gpio_output_enable,
/// Output enable for SCL
scl, 18);
#[cfg(any(feature = "target_zc706", feature = "target_kasli_soc"))]
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register_bit!(gpio_output_enable,
/// Output enable for SDA
sda, 19);