--- /dev/null
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+// SPDX-FileCopyrightText: 2022 Linaro Ltd.
+// SPDX-FileCopyrightTest: 2022 Viresh Kumar <viresh.kumar@linaro.org>
+
+use libgpiod::{Error, Result};
+
+#[allow(non_camel_case_types, non_upper_case_globals)]
+#[cfg_attr(test, allow(deref_nullptr, non_snake_case))]
+#[allow(dead_code)]
+mod bindings_raw {
+ include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
+}
+use bindings_raw::*;
+
+mod sim;
+pub use sim::*;
+
+/// Value settings.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum Value {
+ /// Active
+ Active,
+ /// Inactive
+ InActive,
+}
+
+impl Value {
+ pub(crate) fn new(val: u32) -> Result<Self> {
+ match val {
+ GPIOSIM_VALUE_INACTIVE => Ok(Value::InActive),
+ GPIOSIM_VALUE_ACTIVE => Ok(Value::Active),
+ _ => Err(Error::InvalidEnumValue("Value", val as u32)),
+ }
+ }
+}
+
+/// Direction settings.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum Direction {
+ /// Direction is input - for reading the value of an externally driven GPIO line.
+ Input,
+ /// Direction is output - for driving the GPIO line, value is high.
+ OutputHigh,
+ /// Direction is output - for driving the GPIO line, value is low.
+ OutputLow,
+}
+
+impl Direction {
+ fn val(self) -> i32 {
+ (match self {
+ Direction::Input => GPIOSIM_HOG_DIR_INPUT,
+ Direction::OutputHigh => GPIOSIM_HOG_DIR_OUTPUT_HIGH,
+ Direction::OutputLow => GPIOSIM_HOG_DIR_OUTPUT_LOW,
+ }) as i32
+ }
+}
+
+/// Internal pull settings.
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub enum Pull {
+ /// The internal pull-up is enabled.
+ Up,
+ /// The internal pull-down is enabled.
+ Down,
+}
+
+impl Pull {
+ fn val(self) -> i32 {
+ (match self {
+ Pull::Up => GPIOSIM_PULL_UP,
+ Pull::Down => GPIOSIM_PULL_DOWN,
+ }) as i32
+ }
+}
--- /dev/null
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
+// SPDX-FileCopyrightText: 2022 Linaro Ltd.
+// SPDX-FileCopyrightTest: 2022 Viresh Kumar <viresh.kumar@linaro.org>
+
+use std::ffi::{CStr, CString};
+use std::os::raw::c_char;
+use std::path::PathBuf;
+use std::str;
+
+use libgpiod::{line::Offset, Error, OperationType, Result};
+
+use crate::*;
+
+/// Sim Ctx
+#[derive(Debug)]
+struct SimCtx {
+ ctx: *mut gpiosim_ctx,
+}
+
+// Safe as the pointer is guaranteed to be valid and the associated resource
+// won't be freed until the object is dropped.
+unsafe impl Send for SimCtx {}
+
+impl SimCtx {
+ fn new() -> Result<Self> {
+ // SAFETY: `gpiosim_ctx` returned by gpiosim is guaranteed to live
+ // as long as the `struct SimCtx`.
+ let ctx = unsafe { gpiosim_ctx_new() };
+ if ctx.is_null() {
+ return Err(Error::OperationFailed(
+ OperationType::SimCtxNew,
+ errno::errno(),
+ ));
+ }
+
+ Ok(Self { ctx })
+ }
+}
+
+impl Drop for SimCtx {
+ fn drop(&mut self) {
+ // SAFETY: `gpiosim_ctx` is guaranteed to be valid here.
+ unsafe { gpiosim_ctx_unref(self.ctx) }
+ }
+}
+
+/// Sim Dev
+#[derive(Debug)]
+struct SimDev {
+ dev: *mut gpiosim_dev,
+}
+
+// Safe as the pointer is guaranteed to be valid and the associated resource
+// won't be freed until the object is dropped.
+unsafe impl Send for SimDev {}
+
+impl SimDev {
+ fn new(ctx: &SimCtx) -> Result<Self> {
+ // SAFETY: `gpiosim_dev` returned by gpiosim is guaranteed to live
+ // as long as the `struct SimDev`.
+ let dev = unsafe { gpiosim_dev_new(ctx.ctx) };
+ if dev.is_null() {
+ return Err(Error::OperationFailed(
+ OperationType::SimDevNew,
+ errno::errno(),
+ ));
+ }
+
+ Ok(Self { dev })
+ }
+
+ fn enable(&self) -> Result<()> {
+ // SAFETY: `gpiosim_dev` is guaranteed to be valid here.
+ let ret = unsafe { gpiosim_dev_enable(self.dev) };
+
+ if ret == -1 {
+ Err(Error::OperationFailed(
+ OperationType::SimDevEnable,
+ errno::errno(),
+ ))
+ } else {
+ Ok(())
+ }
+ }
+
+ fn disable(&self) -> Result<()> {
+ // SAFETY: `gpiosim_dev` is guaranteed to be valid here.
+ let ret = unsafe { gpiosim_dev_disable(self.dev) };
+
+ if ret == -1 {
+ Err(Error::OperationFailed(
+ OperationType::SimDevDisable,
+ errno::errno(),
+ ))
+ } else {
+ Ok(())
+ }
+ }
+}
+
+impl Drop for SimDev {
+ fn drop(&mut self) {
+ // SAFETY: `gpiosim_dev` is guaranteed to be valid here.
+ unsafe { gpiosim_dev_unref(self.dev) }
+ }
+}
+
+/// Sim Bank
+#[derive(Debug)]
+struct SimBank {
+ bank: *mut gpiosim_bank,
+}
+
+// Safe as the pointer is guaranteed to be valid and the associated resource
+// won't be freed until the object is dropped.
+unsafe impl Send for SimBank {}
+
+impl SimBank {
+ fn new(dev: &SimDev) -> Result<Self> {
+ // SAFETY: `gpiosim_bank` returned by gpiosim is guaranteed to live
+ // as long as the `struct SimBank`.
+ let bank = unsafe { gpiosim_bank_new(dev.dev) };
+ if bank.is_null() {
+ return Err(Error::OperationFailed(
+ OperationType::SimBankNew,
+ errno::errno(),
+ ));
+ }
+
+ Ok(Self { bank })
+ }
+
+ fn chip_name(&self) -> Result<&str> {
+ // SAFETY: The string returned by gpiosim is guaranteed to live as long
+ // as the `struct SimBank`.
+ let name = unsafe { gpiosim_bank_get_chip_name(self.bank) };
+
+ // SAFETY: The string is guaranteed to be valid here.
+ unsafe { CStr::from_ptr(name) }
+ .to_str()
+ .map_err(Error::StringNotUtf8)
+ }
+
+ fn dev_path(&self) -> Result<PathBuf> {
+ // SAFETY: The string returned by gpiosim is guaranteed to live as long
+ // as the `struct SimBank`.
+ let path = unsafe { gpiosim_bank_get_dev_path(self.bank) };
+
+ // SAFETY: The string is guaranteed to be valid here.
+ let path = unsafe { CStr::from_ptr(path) }
+ .to_str()
+ .map_err(Error::StringNotUtf8)?;
+
+ Ok(PathBuf::from(path))
+ }
+
+ fn val(&self, offset: Offset) -> Result<Value> {
+ // SAFETY: `gpiosim_bank` is guaranteed to be valid here.
+ let ret = unsafe { gpiosim_bank_get_value(self.bank, offset) };
+
+ if ret == -1 {
+ Err(Error::OperationFailed(
+ OperationType::SimBankGetVal,
+ errno::errno(),
+ ))
+ } else {
+ Value::new(ret as u32)
+ }
+ }
+
+ fn set_label(&self, label: &str) -> Result<()> {
+ let label = CString::new(label).map_err(|_| Error::InvalidString)?;
+
+ // SAFETY: `gpiosim_bank` is guaranteed to be valid here.
+ let ret = unsafe { gpiosim_bank_set_label(self.bank, label.as_ptr() as *const c_char) };
+
+ if ret == -1 {
+ Err(Error::OperationFailed(
+ OperationType::SimBankSetLabel,
+ errno::errno(),
+ ))
+ } else {
+ Ok(())
+ }
+ }
+
+ fn set_num_lines(&self, num: usize) -> Result<()> {
+ // SAFETY: `gpiosim_bank` is guaranteed to be valid here.
+ let ret = unsafe { gpiosim_bank_set_num_lines(self.bank, num.try_into().unwrap()) };
+ if ret == -1 {
+ Err(Error::OperationFailed(
+ OperationType::SimBankSetNumLines,
+ errno::errno(),
+ ))
+ } else {
+ Ok(())
+ }
+ }
+
+ fn set_line_name(&self, offset: Offset, name: &str) -> Result<()> {
+ let name = CString::new(name).map_err(|_| Error::InvalidString)?;
+
+ // SAFETY: `gpiosim_bank` is guaranteed to be valid here.
+ let ret = unsafe {
+ gpiosim_bank_set_line_name(self.bank, offset, name.as_ptr() as *const c_char)
+ };
+
+ if ret == -1 {
+ Err(Error::OperationFailed(
+ OperationType::SimBankSetLineName,
+ errno::errno(),
+ ))
+ } else {
+ Ok(())
+ }
+ }
+
+ fn set_pull(&self, offset: Offset, pull: Pull) -> Result<()> {
+ // SAFETY: `gpiosim_bank` is guaranteed to be valid here.
+ let ret = unsafe { gpiosim_bank_set_pull(self.bank, offset, pull.val()) };
+
+ if ret == -1 {
+ Err(Error::OperationFailed(
+ OperationType::SimBankSetPull,
+ errno::errno(),
+ ))
+ } else {
+ Ok(())
+ }
+ }
+
+ fn hog_line(&self, offset: Offset, name: &str, dir: Direction) -> Result<()> {
+ let name = CString::new(name).map_err(|_| Error::InvalidString)?;
+
+ // SAFETY: `gpiosim_bank` is guaranteed to be valid here.
+ let ret = unsafe {
+ gpiosim_bank_hog_line(self.bank, offset, name.as_ptr() as *const c_char, dir.val())
+ };
+
+ if ret == -1 {
+ Err(Error::OperationFailed(
+ OperationType::SimBankHogLine,
+ errno::errno(),
+ ))
+ } else {
+ Ok(())
+ }
+ }
+}
+
+impl Drop for SimBank {
+ fn drop(&mut self) {
+ // SAFETY: `gpiosim_bank` is guaranteed to be valid here.
+ unsafe { gpiosim_bank_unref(self.bank) }
+ }
+}
+
+/// GPIO SIM
+#[derive(Debug)]
+pub struct Sim {
+ _ctx: SimCtx,
+ dev: SimDev,
+ bank: SimBank,
+}
+
+impl Sim {
+ pub fn new(ngpio: Option<usize>, label: Option<&str>, enable: bool) -> Result<Self> {
+ let ctx = SimCtx::new()?;
+ let dev = SimDev::new(&ctx)?;
+ let bank = SimBank::new(&dev)?;
+
+ if let Some(ngpio) = ngpio {
+ bank.set_num_lines(ngpio)?;
+ }
+
+ if let Some(label) = label {
+ bank.set_label(label)?;
+ }
+
+ if enable {
+ dev.enable()?;
+ }
+
+ Ok(Self {
+ _ctx: ctx,
+ dev,
+ bank,
+ })
+ }
+
+ pub fn chip_name(&self) -> &str {
+ self.bank.chip_name().unwrap()
+ }
+
+ pub fn dev_path(&self) -> PathBuf {
+ self.bank.dev_path().unwrap()
+ }
+
+ pub fn val(&self, offset: Offset) -> Result<Value> {
+ self.bank.val(offset)
+ }
+
+ pub fn set_label(&self, label: &str) -> Result<()> {
+ self.bank.set_label(label)
+ }
+
+ pub fn set_num_lines(&self, num: usize) -> Result<()> {
+ self.bank.set_num_lines(num)
+ }
+
+ pub fn set_line_name(&self, offset: Offset, name: &str) -> Result<()> {
+ self.bank.set_line_name(offset, name)
+ }
+
+ pub fn set_pull(&self, offset: Offset, pull: Pull) -> Result<()> {
+ self.bank.set_pull(offset, pull)
+ }
+
+ pub fn hog_line(&self, offset: Offset, name: &str, dir: Direction) -> Result<()> {
+ self.bank.hog_line(offset, name, dir)
+ }
+
+ pub fn enable(&self) -> Result<()> {
+ self.dev.enable()
+ }
+
+ pub fn disable(&self) -> Result<()> {
+ self.dev.disable()
+ }
+}
projects / qemu-gpiodev / libgpiod.git / commitdiff