vasilito
b9874d0941
Add redbear-usb-storage-check in-guest binary that validates USB mass storage read and write I/O: discovers /scheme/disk/ devices, writes a test pattern to sector 2048, reads it back, verifies match, restores original content. Updates test-usb-storage-qemu.sh with write-proof verification step. Includes all accumulated Red Bear OS work: kernel patches, relibc patches, driver infrastructure, DRM/GPU, KDE recipes, firmware, validation tooling, build system hardening, and documentation.
100 lines
2.4 KiB
Rust
100 lines
2.4 KiB
Rust
use std::convert::Infallible;
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use std::time::Duration;
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use common::io::{Io, MmioPtr};
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use embedded_hal::digital::v2 as digital;
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use crate::device::HalTimer;
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use super::MmioRegion;
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const GPIO_DIR_MASK: u32 = 1 << 0;
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const GPIO_DIR_OUT: u32 = 1 << 1;
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const GPIO_VAL_MASK: u32 = 1 << 2;
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const GPIO_VAL_OUT: u32 = 1 << 3;
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const GPIO_VAL_IN: u32 = 1 << 4;
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const GPIO_CLOCK_SHIFT: u32 = 0;
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const GPIO_DATA_SHIFT: u32 = 8;
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#[derive(Copy, Clone, Debug)]
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#[repr(usize)]
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pub enum GpioPort {
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Port0 = 0xC5010,
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Port1 = 0xC5014,
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Port2 = 0xC5018,
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Port3 = 0xC501C,
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Port4 = 0xC5020,
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Port5 = 0xC5024,
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Port6 = 0xC5028,
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Port7 = 0xC502C,
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Port8 = 0xC5030,
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Port9 = 0xC5034,
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Port10 = 0xC5038,
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Port11 = 0xC503C,
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Port12 = 0xC5040,
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Port13 = 0xC5044,
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Port14 = 0xC5048,
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Port15 = 0xC504C,
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}
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impl GpioPort {
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pub unsafe fn i2c(
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&self,
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gttmm: &MmioRegion,
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) -> syscall::Result<bitbang_hal::i2c::I2cBB<GpioPin, GpioPin, HalTimer>> {
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let i2c_freq = 100_000.0;
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let (scl, sda) = unsafe {
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(
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GpioPin {
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ctl: gttmm.mmio(*self as usize)?,
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shift: GPIO_CLOCK_SHIFT,
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},
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GpioPin {
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ctl: gttmm.mmio(*self as usize)?,
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shift: GPIO_DATA_SHIFT,
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},
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)
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};
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Ok(bitbang_hal::i2c::I2cBB::new(
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scl,
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sda,
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HalTimer::new(Duration::from_secs_f64(1.0 / i2c_freq)),
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))
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}
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}
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pub struct GpioPin {
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ctl: MmioPtr<u32>,
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shift: u32,
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}
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impl digital::InputPin for GpioPin {
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type Error = Infallible;
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fn is_high(&self) -> Result<bool, Infallible> {
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Ok(((self.ctl.read() >> self.shift) & GPIO_VAL_IN) == GPIO_VAL_IN)
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}
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fn is_low(&self) -> Result<bool, Infallible> {
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Ok(((self.ctl.read() >> self.shift) & GPIO_VAL_IN) == 0)
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}
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}
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impl digital::OutputPin for GpioPin {
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type Error = Infallible;
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fn set_low(&mut self) -> Result<(), Infallible> {
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// Set GPIO to output with value 0
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let value = GPIO_DIR_MASK | GPIO_DIR_OUT | GPIO_VAL_MASK;
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self.ctl.write(value << self.shift);
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Ok(())
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}
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fn set_high(&mut self) -> Result<(), Infallible> {
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// Assuming external pull-up, set GPIO to input
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let value = GPIO_DIR_MASK;
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self.ctl.write(value << self.shift);
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Ok(())
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}
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}
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