FORCE_POWER

you-ass-bee-see/Cargo.lock

@@ -24,6 +24,29 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
+[[package]]
+name = "coreboot-collector"
+version = "0.1.0"
+dependencies = [
+ "err-derive",
+ "libc",
+ "sysfs-class",
+]
+
+[[package]]
+name = "err-derive"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22deed3a8124cff5fa835713fa105621e43bbdc46690c3a6b68328a012d350d4"
+dependencies = [
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "rustversion",
+ "syn",
+ "synstructure",
+]
+
 [[package]]
 name = "i2cdev"
 version = "0.4.4"
@@ -55,6 +78,103 @@ dependencies = [
  "void",
 ]
 
+[[package]]
+name = "numtoa"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e521b6adefa0b2c1fa5d2abdf9a5216288686fe6146249215d884c0e5ab320b0"
+
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa563d17ecb180e500da1cfd2b028310ac758de548efdd203e18f283af693f37"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "rustversion"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb5d2a036dc6d2d8fd16fde3498b04306e29bd193bf306a57427019b823d5acd"
+
+[[package]]
+name = "syn"
+version = "1.0.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8833e20724c24de12bbaba5ad230ea61c3eafb05b881c7c9d3cfe8638b187e68"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-xid",
+]
+
+[[package]]
+name = "synstructure"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b834f2d66f734cb897113e34aaff2f1ab4719ca946f9a7358dba8f8064148701"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "unicode-xid",
+]
+
+[[package]]
+name = "sysfs-class"
+version = "0.1.3"
+source = "git+https://github.com/pop-os/sysfs-class.git#c3b86e07c36feb9b705b8c24af1498cbd396de4e"
+dependencies = [
+ "numtoa",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
+[[package]]
+name = "version_check"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
+
 [[package]]
 name = "void"
 version = "1.0.2"
@@ -65,5 +185,6 @@ checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 name = "you-ass-bee-see"
 version = "0.1.0"
 dependencies = [
+ "coreboot-collector",
  "i2cdev",
 ]

you-ass-bee-see/Cargo.toml

@@ -7,4 +7,5 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+coreboot-collector = { path = "../tools/coreboot-collector" }
 i2cdev = "0.4.4"

you-ass-bee-see/src/main.rs

@@ -1,6 +1,7 @@
+use coreboot_collector::sideband::Sideband;
 use i2cdev::core::I2CDevice;
 use i2cdev::linux::LinuxI2CDevice;
-use std::fs;
+use std::{fs, thread, time};
 
 const IECS_CMD: u8 = 8;
 const IECS_DATA: u8 = 9;
@@ -12,6 +13,8 @@ const CMD_BLKW: u32 = 0x574b4c42;
 const CMD_BOPS: u32 = 0x53504f42;
 const CMD_PCYC: u32 = 0x43594350;
 
+const GPIO_FORCE_POWER: (u8, u8) = (0x6E, 0x82); // GPP_A23
+
 fn read<I: I2CDevice>(dev: &mut I, reg: u8) -> Result<u32, I::Error> {
     let bytes = dev.smbus_read_block_data(reg)?;
     //TODO: return error on bytes.len() != 4
@@ -46,7 +49,20 @@ fn command<I: I2CDevice>(dev: &mut I, cmd: u32) -> Result<u32, I::Error> {
 }
 
 fn main() {
-    //TODO: force power and sleep 40ms
+    //TODO: check model
+
+    let sideband = unsafe { Sideband::new(0xFD00_0000).unwrap() };
+
+    // Set FORCE_POWER high
+    unsafe {
+        let (port, pad) = GPIO_FORCE_POWER;
+        let mut value = sideband.gpio(port, pad);
+        value |= 1;
+        sideband.set_gpio(port, pad, value);
+    }
+
+    // Sleep 40ms
+    thread::sleep(time::Duration::from_millis(40));
 
     let mut dev = LinuxI2CDevice::new("/dev/i2c-11", 0x40).unwrap();
     eprintln!("Vendor: {:X}", read(&mut dev, 0).unwrap());
@@ -58,6 +74,9 @@ fn main() {
         println!("{}: {:X}", i, read(&mut dev, i).unwrap());
     }
 
+    write(&mut dev, IECS_DATA, 0).unwrap();
+    println!("IECS_DATA: {:X}", read(&mut dev, IECS_DATA).unwrap());
+
     /*
     eprintln!("Set offset to 0");
     write(&mut dev, IECS_DATA, 0).unwrap();
@@ -105,4 +124,12 @@ fn main() {
 
     eprintln!("Successfully flashed retimer");
     */
+
+    // Set FORCE_POWER low
+    unsafe {
+        let (port, pad) = GPIO_FORCE_POWER;
+        let mut value = sideband.gpio(port, pad);
+        value &= !1;
+        sideband.set_gpio(port, pad, value);
+    }
 }