tool: Implement usbc_mux_info command

tool/src/ec.rs

@@ -40,6 +40,7 @@ enum Cmd {
     SecurityGet = 20,
     SecuritySet = 21,
     FanTach = 22,
+    UsbcMuxInfo = 23,
 }
 
 const CMD_SPI_FLAG_READ: u8 = 1 << 0;
@@ -328,6 +329,16 @@ impl<A: Access> Ec<A> {
        self.command(Cmd::SecuritySet, &mut data)
     }
 
+    /// Get USB-C mux info
+    pub unsafe fn usbc_mux_info(&mut self, port: u8) -> Result<u16, Error> {
+       let mut data = [port, 0, 0];
+       self.command(Cmd::UsbcMuxInfo, &mut data)?;
+        Ok(
+            (data[1] as u16) |
+            ((data[2] as u16) << 8)
+        )
+    }
+
     /// Read fan tachometer by fan index
     pub unsafe fn fan_tach(&mut self, index: u8) -> Result<u16, Error> {
         let mut data = [

tool/src/main.rs

@@ -300,6 +300,13 @@ unsafe fn security_set(ec: &mut Ec<Box<dyn Access>>, state: SecurityState) -> Re
     Ok(())
 }
 
+unsafe fn usbc_mux_info(ec: &mut Ec<Box<dyn Access>>, port: u8) -> Result<(), Error> {
+    let info = ec.usbc_mux_info(port)?;
+    println!("{:04X}", info);
+
+    Ok(())
+}
+
 fn parse_color(s: &str) -> Result<(u8, u8, u8), String> {
     let r = u8::from_str_radix(&s[0..2], 16);
     let g = u8::from_str_radix(&s[2..4], 16);
@@ -364,6 +371,9 @@ enum SubCommand {
     Security {
         state: Option<String>,
     },
+    UsbcMuxInfo {
+        port: u8,
+    },
 }
 
 #[derive(clap::ArgEnum, Clone)]
@@ -652,5 +662,14 @@ fn main() {
                 },
             }
         },
+        SubCommand::UsbcMuxInfo { port }  => {
+            match unsafe { usbc_mux_info(&mut ec, port) } {
+                Ok(()) => (),
+                Err(err) => {
+                    eprintln!("failed to get usbc_mux_info {}: {:X?}", port, err);
+                    process::exit(1);
+                },
+            }
+        },
     }
 }