1 files changed, 58 insertions, 0 deletions
diff --git a/sound_card_init/amp/src/lib.rs b/sound_card_init/amp/src/lib.rs
new file mode 100644
index 00000000..7114233d
--- /dev/null
+++ b/sound_card_init/amp/src/lib.rs
@@ -0,0 +1,58 @@
+// Copyright 2021 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//! `amp` crate provides `Amp` trait for amplifier initializations and `AmpBuilder`
+//! to create `Amp` objects.
+#![deny(missing_docs)]
+
+mod max98373d;
+mod max98390d;
+use std::path::PathBuf;
+
+use dsm::Error;
+
+use max98373d::Max98373;
+use max98390d::Max98390;
+
+type Result<T> = std::result::Result<T, Error>;
+const CONF_DIR: &str = "/etc/sound_card_init";
+
+/// It creates `Amp` object based on the sound card name.
+pub struct AmpBuilder<'a> {
+    sound_card_id: &'a str,
+    config_path: PathBuf,
+}
+
+impl<'a> AmpBuilder<'a> {
+    /// Creates an `AmpBuilder`.
+    /// # Arguments
+    ///
+    /// * `card_name` - card name.
+    /// * `conf_file` - config file name.
+    pub fn new(sound_card_id: &'a str, conf_file: &'a str) -> Self {
+        let config_path = PathBuf::from(CONF_DIR).join(conf_file);
+        AmpBuilder {
+            sound_card_id,
+            config_path,
+        }
+    }
+
+    /// Creates an `Amp` based on the sound card name.
+    pub fn build(&self) -> Result<Box<dyn Amp>> {
+        match self.sound_card_id {
+            "sofcmlmax98390d" => {
+                Ok(Box::new(Max98390::new(self.sound_card_id, &self.config_path)?) as Box<dyn Amp>)
+            }
+            "sofrt5682" => {
+                Ok(Box::new(Max98373::new(self.sound_card_id, &self.config_path)?) as Box<dyn Amp>)
+            }
+            _ => Err(Error::UnsupportedSoundCard(self.sound_card_id.to_owned())),
+        }
+    }
+}
+
+/// It defines the required functions of amplifier objects.
+pub trait Amp {
+    /// The amplifier boot time calibration flow.
+    fn boot_time_calibration(&mut self) -> Result<()>;
+}