diff --git a/.gitignore b/.gitignore index 8cf8ec7..d0f36c6 100644 --- a/.gitignore +++ b/.gitignore @@ -55,3 +55,4 @@ dkms.conf *.cmake /tascam_controls/build /tascam_controls/.tools +raw_jack_us144mkii/jack_tascam diff --git a/Linux Driver Development Specification for TASCAM US-144 MKII.txt b/Linux Driver Development Specification for TASCAM US-144 MKII.txt index ee56e6b..d824b08 100644 --- a/Linux Driver Development Specification for TASCAM US-144 MKII.txt +++ b/Linux Driver Development Specification for TASCAM US-144 MKII.txt @@ -358,7 +358,6 @@ Generated code * **Note:** The pattern tables provided are specifically for 48kHz. To support other sample rates (44.1kHz, 88.2kHz, 96kHz), the corresponding `fpoInitPattern` calls from the macOS driver's `PGFramePatternObserver::init` would need to be analyzed to derive their specific pattern tables. The `mExpectedFramesPerMicroframe` (`a1 + 24`) and `mExpectedFeedbackValue` (`a1 + 36`) would change based on the sample rate. - IGNORE_WHEN_COPYING_START Use code with caution. @@ -447,7 +446,7 @@ Normal 128 smp (2.7ms) 2 ms (2 packets/URB) High 256 smp (5.3ms) 5 ms (5 packets/URB) Highest 512 smp (10.7ms) 5 ms (5 packets/URB) -Table 3: 88.2kHz Latency Settings (Placeholder) +Table 3: 88.2kHz Latency Settings Latency Profile ASIO Buffer (Reported) Hardware Feedback (Observed) diff --git a/Makefile b/Makefile index b180f21..6e9ba66 100644 --- a/Makefile +++ b/Makefile @@ -1,5 +1,5 @@ obj-m += snd-usb-us144mkii.o -snd-usb-us144mkii-y := us144mkii.o us144mkii_pcm.o us144mkii_playback.o us144mkii_capture.o us144mkii_midi.o us144mkii_controls.o +snd-usb-us144mkii-y := us144mkii.o us144mkii_pcm.o us144mkii_playback.o us144mkii_capture.o us144mkii_midi.o all: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules diff --git a/README.md b/README.md index 6f0c2c2..bb4e929 100644 --- a/README.md +++ b/README.md @@ -4,13 +4,7 @@ An unofficial ALSA kernel module for the TASCAM US-144MKII USB audio interface. ## 📢 Project Status -✅ **Upstreamed** — This driver has been merged into the [`sound/for-next`](https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/log/?h=for-next) branch for inclusion in an upcoming Linux kernel release. - -📦 This repository will be **archived** once the driver appears in the official kernel. Until then, the out-of-tree version here can still be built and tested. - -## ❗ Current Status: Work in Progress - -This driver is under active development. +*--- OLD VERSION --- ✅ **Upstreamed** — This driver has been merged into the [`sound/for-next`](https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/log/?h=for-next) branch for inclusion in an upcoming Linux kernel release. ### ✅ Implemented Features * **Audio Playback:** @@ -18,7 +12,6 @@ This driver is under active development. * **MIDI IN/OUT:** ### 📝 To-Do & Known Limitations -* Find Bugs, if possible improve performance/stablity * *MIDI IN/OUT works only in active audio streaming(DAW ALSA/JACK or browser audio) * Non MKII US-144 needs testing to see if the driver will work with it. @@ -26,6 +19,15 @@ This driver is under active development. This is an out-of-tree kernel module, meaning you must compile it against the headers for your specific kernel version. +For Arch users, a community-maintained DKMS package is available in AUR. +Install it via: +```bash +paru -S us144mkii-dkms-git +``` +or if you are using yay: +```bash +yay -S us144mkii-dkms-git +``` ### Step 1: Blacklist the Stock `snd-usb-us122l` Driver The standard kernel includes a driver that will conflict with our custom module. You must prevent it from loading. @@ -115,17 +117,17 @@ cd us144mkii/ 4. Connect your TASCAM US-144MKII. Verify that the driver loaded and the audio card is recognized by the system: ```bash # Check if the kernel module is loaded - lsmod | grep us144mkii + lsmod | grep snd_usb_us144mkii # Check if ALSA sees the new sound card aplay -l ``` - The first command should show `us144mkii`. The second command should list your "TASCAM US-144MKII" as an available playback device. You should now be able to select it in your audio settings and play sound. + The first command should show `snd_usb_us144mkii`. The second command should list your "TASCAM US-144MKII" as an available playback device. You should now be able to select it in your audio settings and play sound. ### Step 4: Install for Automatic Loading on Boot To make the driver load automatically every time you start your computer, follow these steps after you have successfully compiled it in Step 3. -You can use build_install script to do automate this process just `sudo chmod +x build_install.sh` before you run it with `./build_install.sh` or just do it +You can use build_and_install script to do automate this process just `sudo chmod +x build_and_install.sh` before you run it with `./build_and_install.sh` or just do it the manual way. 1. **Copy the compiled module to the kernel's extra modules directory.** This makes it available to system tools. @@ -141,87 +143,6 @@ the manual way. Now, after a reboot, the `us144mkii` driver should load automatically. -### Tascam Control Panel - -image - - -A control panel app built with Qt6 and ALSA. - -Get it from releases or build it. - -## Prerequisites - -Before building the application, ensure you have the following installed on your system: - -* **CMake** (version 3.16 or higher) -* **C++ Compiler** (supporting C++17, e.g., GCC/G++) -* **Qt6 Development Libraries** (specifically the `Widgets` module) -* **ALSA Development Libraries** -* **Make** (or Ninja) - -### Installation of Prerequisites by Distribution - -#### Debian/Ubuntu - -sudo apt update -sudo apt install cmake build-essential qt6-base-dev qt6-base-dev-tools libasound2-dev - -#### Fedora/RHEL/CentOS - -sudo dnf install cmake "Development Tools" qt6-qtbase-devel alsa-lib-devel - -#### Arch Linux - -sudo pacman -Syu - -sudo pacman -S cmake base-devel qt6-base alsa-lib - -#### openSUSE - -sudo zypper install cmake gcc-c++ libqt6-qtbase-devel alsa-devel - -## Building the Application - -Follow these steps to build the `TascamControlPanel` application from source: - -1. **Clone the repository** (if you haven't already): - - ```git clone https://github.com/serifpersia/us144mkii.git``` - - ```cd tascam_controls/``` - -2. **Create a build directory** and navigate into it: - - ```mkdir build``` - ```cd build``` - -4. **Configure the project** with CMake: - - ```cmake ..``` - - This step will check for all necessary dependencies and generate the build files. - -5. **Build the application**: - - ```make -j$(nproc)``` - - This command compiles the source code. The -j$(nproc) option uses all available CPU cores to speed up the compilation process. - -## Running the Application - -After a successful build, the executable will be located in the `build` directory. - -```./TascamControlPanel``` - -## Cleaning the Build - -To remove all compiled files and intermediate artifacts, simply delete the `build` directory: - -cd .. -rm -rf build - - ## Reporting Issues & Feedback If you test this driver, please share your feedback to help improve it. Include: diff --git a/tascam_controls/CMakeLists.txt b/tascam_controls/CMakeLists.txt deleted file mode 100644 index 71c754b..0000000 --- a/tascam_controls/CMakeLists.txt +++ /dev/null @@ -1,29 +0,0 @@ -cmake_minimum_required(VERSION 3.16) -project(TascamControlPanel LANGUAGES CXX) - -set(CMAKE_CXX_STANDARD 17) -set(CMAKE_CXX_STANDARD_REQUIRED ON) -set(CMAKE_AUTOMOC ON) -set(CMAKE_AUTORCC ON) -set(CMAKE_AUTOUIC ON) - -find_package(Qt6 6.2 COMPONENTS Widgets REQUIRED) -find_package(ALSA REQUIRED) - -add_executable(TascamControlPanel - src/main.cpp - src/mainwindow.h - src/mainwindow.cpp - src/alsacontroller.h - src/alsacontroller.cpp - resources/resources.qrc -) - -target_link_libraries(TascamControlPanel PRIVATE - Qt6::Widgets - ALSA::ALSA -) - -install(TARGETS TascamControlPanel - RUNTIME DESTINATION bin -) diff --git a/tascam_controls/build_appimage.sh b/tascam_controls/build_appimage.sh deleted file mode 100755 index a5dfefb..0000000 --- a/tascam_controls/build_appimage.sh +++ /dev/null @@ -1,74 +0,0 @@ -#!/bin/bash - -set -e - -APP_NAME="TascamControlPanel" -PROJECT_DIR=$(pwd) -BUILD_DIR="${PROJECT_DIR}/build" - -TOOLS_DIR="${PROJECT_DIR}/.tools" - -LINUXDEPLOY_FILENAME="linuxdeploy-xnormal.AppImage" -LINUXDEPLOY_PATH="${TOOLS_DIR}/${LINUXDEPLOY_FILENAME}" -LINUXDEPLOY_URL="https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage" - -QT_PLUGIN_FILENAME="linuxdeploy-plugin-qt" -QT_PLUGIN_PATH="${TOOLS_DIR}/${QT_PLUGIN_FILENAME}" -QT_PLUGIN_URL="https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/download/continuous/linuxdeploy-plugin-qt-x86_64.AppImage" - -echo "--- Checking for deployment tools ---" -mkdir -p "${TOOLS_DIR}" - -if [ ! -f "${LINUXDEPLOY_PATH}" ]; then - echo "linuxdeploy not found. Downloading..." - wget -c -O "${LINUXDEPLOY_PATH}" "${LINUXDEPLOY_URL}" - chmod +x "${LINUXDEPLOY_PATH}" -fi - -if [ ! -f "${QT_PLUGIN_PATH}" ]; then - echo "linuxdeploy-plugin-qt not found. Downloading..." - wget -c -O "${QT_PLUGIN_PATH}" "${QT_PLUGIN_URL}" - chmod +x "${QT_PLUGIN_PATH}" -fi -echo "All tools are ready." - - -echo "--- Building the C++ application ---" -mkdir -p ${BUILD_DIR} -cd ${BUILD_DIR} -cmake .. -make -j$(nproc) -cd ${PROJECT_DIR} - -echo "--- Running linuxdeploy to create the AppImage ---" -rm -rf AppDir - -export NO_STRIP=1 - -export PATH="${TOOLS_DIR}:${PATH}" - -echo "--- Detecting Qt6 qmake ---" -if command -v qmake6 &> /dev/null; then - export QMAKE=$(command -v qmake6) -elif command -v qt6-qmake &> /dev/null; then - export QMAKE=$(command -v qt6-qmake) -elif command -v qmake &> /dev/null && qmake -v | grep -q "Qt version 6"; then - export QMAKE=$(command -v qmake) -else - echo "ERROR: Could not find a Qt6 qmake executable." - echo "Please install the Qt6 development package for your distribution." - echo "(e.g., 'sudo pacman -S qt6-base' or 'sudo apt install qt6-base-dev')" - exit 1 -fi -echo "Found qmake at: ${QMAKE}" - -"${LINUXDEPLOY_PATH}" --appdir AppDir \ - -e "${BUILD_DIR}/${APP_NAME}" \ - -i "${PROJECT_DIR}/resources/tascam-control-panel.png" \ - -d "${PROJECT_DIR}/tascam-control-panel.desktop" \ - --plugin qt \ - --output appimage - -echo "" -echo "--- DONE ---" -echo "AppImage created successfully!" diff --git a/tascam_controls/resources/bg.png b/tascam_controls/resources/bg.png deleted file mode 100644 index 5eec530..0000000 Binary files a/tascam_controls/resources/bg.png and /dev/null differ diff --git a/tascam_controls/resources/device.png b/tascam_controls/resources/device.png deleted file mode 100644 index 1b7c690..0000000 Binary files a/tascam_controls/resources/device.png and /dev/null differ diff --git a/tascam_controls/resources/logo.png b/tascam_controls/resources/logo.png deleted file mode 100644 index d3fd4e8..0000000 Binary files a/tascam_controls/resources/logo.png and /dev/null differ diff --git a/tascam_controls/resources/resources.qrc b/tascam_controls/resources/resources.qrc deleted file mode 100644 index 0718bf4..0000000 --- a/tascam_controls/resources/resources.qrc +++ /dev/null @@ -1,9 +0,0 @@ - - - - bg.png - logo.png - device.png - tascam-control-panel.png - - diff --git a/tascam_controls/resources/tascam-control-panel.png b/tascam_controls/resources/tascam-control-panel.png deleted file mode 100644 index 7b211c5..0000000 Binary files a/tascam_controls/resources/tascam-control-panel.png and /dev/null differ diff --git a/tascam_controls/src/alsacontroller.cpp b/tascam_controls/src/alsacontroller.cpp deleted file mode 100644 index 856b510..0000000 --- a/tascam_controls/src/alsacontroller.cpp +++ /dev/null @@ -1,130 +0,0 @@ -#include "alsacontroller.h" -#include -#include -#include -#include - -AlsaController::AlsaController(const std::vector& target_card_names) -{ - int card = -1; - if (snd_card_next(&card) < 0 || card < 0) { - std::cerr << "No sound cards found." << std::endl; - return; - } - - while (card >= 0) { - char* long_name = nullptr; - snd_card_get_longname(card, &long_name); - if (long_name) { - bool found_match_and_freed = false; - for (const auto& name : target_card_names) { - if (std::string(long_name).find(name) != std::string::npos) { - m_card_num = card; - m_card_id_str = "hw:" + std::to_string(card); - m_card_found = true; - free(long_name); - found_match_and_freed = true; - break; - } - } - if (!found_match_and_freed) { - free(long_name); - } - } - - if (m_card_found) break; - - if (snd_card_next(&card) < 0) { - break; - } - } - - if (!m_card_found) { - std::cerr << "Target sound card(s) not found." << std::endl; - } -} - -std::optional AlsaController::getCardId() const { - if (m_card_found) { - return m_card_id_str; - } - return std::nullopt; -} - -int AlsaController::getCardNumber() const { - return m_card_num; -} - -bool AlsaController::isCardFound() const { - return m_card_found; -} - -long AlsaController::getControlValue(const std::string& control_name) { - if (!m_card_found) return 0; - - snd_ctl_t *handle; - if (snd_ctl_open(&handle, m_card_id_str.c_str(), 0) < 0) return 0; - - snd_ctl_elem_id_t *id; - snd_ctl_elem_value_t *control; - snd_ctl_elem_id_alloca(&id); - snd_ctl_elem_value_alloca(&control); - - snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); - snd_ctl_elem_id_set_name(id, control_name.c_str()); - - snd_ctl_elem_value_set_id(control, id); - - if (snd_ctl_elem_read(handle, control) < 0) { - snd_ctl_close(handle); - return 0; - } - - long value = snd_ctl_elem_value_get_integer(control, 0); - snd_ctl_close(handle); - return value; -} - -bool AlsaController::setControlValue(const std::string& control_name, long value) { - if (!m_card_found) return false; - - snd_ctl_t *handle; - if (snd_ctl_open(&handle, m_card_id_str.c_str(), 0) < 0) return false; - - snd_ctl_elem_id_t *id; - snd_ctl_elem_value_t *control; - snd_ctl_elem_id_alloca(&id); - snd_ctl_elem_value_alloca(&control); - - snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); - snd_ctl_elem_id_set_name(id, control_name.c_str()); - snd_ctl_elem_value_set_id(control, id); - - if (snd_ctl_elem_read(handle, control) < 0) { - snd_ctl_close(handle); - return false; - } - - snd_ctl_elem_value_set_integer(control, 0, value); - - if (snd_ctl_elem_write(handle, control) < 0) { - snd_ctl_close(handle); - return false; - } - - snd_ctl_close(handle); - return true; -} - -std::string AlsaController::readSysfsAttr(const std::string& attr_name) { - if (!m_card_found) return "N/A"; - - std::string path = "/sys/class/sound/card" + std::to_string(m_card_num) + "/device/" + attr_name; - std::ifstream file(path); - if (file.is_open()) { - std::string line; - std::getline(file, line); - return line; - } - return "N/A"; -} \ No newline at end of file diff --git a/tascam_controls/src/alsacontroller.h b/tascam_controls/src/alsacontroller.h deleted file mode 100644 index f6f2d88..0000000 --- a/tascam_controls/src/alsacontroller.h +++ /dev/null @@ -1,27 +0,0 @@ -#ifndef ALSACONTROLLER_H -#define ALSACONTROLLER_H - -#include -#include -#include - -class AlsaController { -public: - AlsaController(const std::vector &target_card_names = { - "US-144MKII", "US-144"}); - - std::optional getCardId() const; - int getCardNumber() const; - bool isCardFound() const; - - long getControlValue(const std::string &control_name); - bool setControlValue(const std::string &control_name, long value); - std::string readSysfsAttr(const std::string &attr_name); - -private: - std::string m_card_id_str; - int m_card_num = -1; - bool m_card_found = false; -}; - -#endif \ No newline at end of file diff --git a/tascam_controls/src/main.cpp b/tascam_controls/src/main.cpp deleted file mode 100644 index f9d6aad..0000000 --- a/tascam_controls/src/main.cpp +++ /dev/null @@ -1,12 +0,0 @@ -#include -#include "mainwindow.h" - -int main(int argc, char *argv[]) -{ - QApplication app(argc, argv); - - MainWindow window; - window.show(); - - return app.exec(); -} diff --git a/tascam_controls/src/mainwindow.cpp b/tascam_controls/src/mainwindow.cpp deleted file mode 100644 index d5ac751..0000000 --- a/tascam_controls/src/mainwindow.cpp +++ /dev/null @@ -1,279 +0,0 @@ -#include "mainwindow.h" - -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include - -const QString DARK_STYLESHEET = R"( - QWidget { - background-color: transparent; - color: #DAE0ED; - font-family: Arial; - } - QLabel { - background-color: transparent; - } - QLabel#Title { - font-size: 15pt; - font-weight: bold; - color: #FFFFFF; - } - QLabel#SectionHeader { - font-size: 11pt; - font-weight: bold; - color: #92E8FF; - margin-top: 10px; - margin-bottom: 3px; - } - QLabel#ControlLabel { - font-size: 9pt; - color: #CBD2E6; - } - QComboBox { - background-color: rgba(10, 10, 20, 0.25); - border: 1px solid #3A4760; - border-radius: 4px; - padding: 4px; - color: #DAE0ED; - } - QComboBox:hover { - background-color: rgba(15, 15, 25, 0.35); - border: 1px solid #6482B4; - } - QComboBox::drop-down { - border: none; - } - QComboBox QAbstractItemView { - background-color: rgba(15, 15, 25, 0.9); - border: 1px solid #3A4760; - selection-background-color: #6A3AB1; - color: #DAE0ED; - } - QPushButton { - background-color: rgba(10, 10, 20, 0.25); - border: 1px solid #3A4760; - border-radius: 4px; - padding: 5px; - color: #92E8FF; - } - QPushButton:hover { - background-color: rgba(15, 15, 25, 0.35); - border: 1px solid #6482B4; - } - QPushButton:pressed { - background-color: rgba(20, 20, 30, 0.45); - border: 1px solid #A020F0; - } -)"; - -MainWindow::MainWindow(QWidget *parent) - : QWidget(parent) - , m_alsa() - , m_aboutDialog(nullptr) -{ - if (!m_alsa.isCardFound()) { - QMessageBox::critical(this, "Error", "TASCAM US-144/US-144MKII Not Found.\nPlease ensure the device is connected and the 'us144mkii' driver is loaded."); - QTimer::singleShot(0, this, &QWidget::close); - return; - } - - initUi(); - loadDynamicSettings(); -} - -void MainWindow::initUi() { - setWindowTitle("TASCAM US-144MKII Control Panel"); - setWindowIcon(QIcon(":/tascam-control-panel.png")); - setFixedSize(550, 450); - setStyleSheet(DARK_STYLESHEET); - - m_background.load(":/bg.png"); - if (m_background.isNull()) { - qWarning() << "Failed to load background image from resources!"; - } - - auto *topLevelLayout = new QHBoxLayout(this); - topLevelLayout->setContentsMargins(20, 20, 20, 20); - topLevelLayout->setSpacing(25); - - auto *leftPanel = new QVBoxLayout(); - auto *middlePanel = new QVBoxLayout(); - - auto *logoLabel = new QLabel(); - logoLabel->setPixmap(QPixmap(":/logo.png").scaledToWidth(250, Qt::SmoothTransformation)); - auto *titleLabel = new QLabel("US-144 MKII Control Panel"); - titleLabel->setObjectName("Title"); - - auto *infoGrid = new QGridLayout(); - infoGrid->setSpacing(5); - const QMap infoData = { - {"Device:", "device"}, - {"Sample Width:", "sample_width"}, {"Sample Rate:", "sample_rate"} - }; - int row = 0; - for (auto it = infoData.constBegin(); it != infoData.constEnd(); ++it) { - auto *label = new QLabel(it.key()); - label->setFont(QFont("Arial", 9, QFont::Bold)); - auto *valueLabel = new QLabel("N/A"); - valueLabel->setFont(QFont("Arial", 9)); - infoGrid->addWidget(label, row, 0); - infoGrid->addWidget(valueLabel, row, 1); - m_infoLabels[it.value()] = valueLabel; - row++; - } - - auto *deviceImageLabel = new QLabel(); - deviceImageLabel->setPixmap(QPixmap(":/device.png").scaled(250, 250, Qt::KeepAspectRatio, Qt::SmoothTransformation)); - deviceImageLabel->setAlignment(Qt::AlignCenter); - - leftPanel->addWidget(logoLabel); - leftPanel->addWidget(titleLabel); - leftPanel->addLayout(infoGrid); - leftPanel->addStretch(); - leftPanel->addWidget(deviceImageLabel); - - middlePanel->setSpacing(0); - - auto addSection = [&](const QString& title, QWidget* widget) { - auto* header = new QLabel(title); - header->setObjectName("SectionHeader"); - middlePanel->addWidget(header); - middlePanel->addWidget(widget); - }; - - auto capture12Pair = createControlWidget("Ch1/2 Capture Source", {"Analog In", "Digital In"}); - m_capture12Combo = capture12Pair.second; - m_capture12Combo->setToolTip("Select the source for capture channels 1 and 2."); - auto capture34Pair = createControlWidget("Ch3/4 Capture Source", {"Analog In", "Digital In"}); - m_capture34Combo = capture34Pair.second; - m_capture34Combo->setToolTip("Select the source for capture channels 3 and 4."); - addSection("INPUTS", capture12Pair.first); - middlePanel->addWidget(capture34Pair.first); - - auto lineOutPair = createControlWidget("Line Playback Source", {"Playback 1-2", "Playback 3-4"}); - m_lineOutCombo = lineOutPair.second; - m_lineOutCombo->setToolTip("Select the source for the line outputs."); - addSection("LINE OUTPUTS", lineOutPair.first); - - auto digitalOutPair = createControlWidget("Digital Playback Source", {"Playback 1-2", "Playback 3-4"}); - m_digitalOutCombo = digitalOutPair.second; - m_digitalOutCombo->setToolTip("Select the source for the digital outputs."); - addSection("DIGITAL OUTPUTS", digitalOutPair.first); - - middlePanel->addStretch(); - - auto *buttonLayout = new QHBoxLayout(); - auto *aboutButton = new QPushButton("About"); - aboutButton->setFixedSize(100, 30); - connect(aboutButton, &QPushButton::clicked, this, &MainWindow::showAboutDialog); - buttonLayout->addWidget(aboutButton); - middlePanel->addLayout(buttonLayout); - - topLevelLayout->addLayout(leftPanel, 1); - topLevelLayout->addLayout(middlePanel, 1); - - connect(m_lineOutCombo, &QComboBox::currentIndexChanged, this, [this](int index){ onControlChanged("Line Playback Source", index, m_lineOutCombo); }); - connect(m_digitalOutCombo, &QComboBox::currentIndexChanged, this, [this](int index){ onControlChanged("Digital Playback Source", index, m_digitalOutCombo); }); - connect(m_capture12Combo, &QComboBox::currentIndexChanged, this, [this](int index){ onControlChanged("Ch1/2 Capture Source", index, m_capture12Combo); }); - connect(m_capture34Combo, &QComboBox::currentIndexChanged, this, [this](int index){ onControlChanged("Ch3/4 Capture Source", index, m_capture34Combo); }); -} - -void MainWindow::loadDynamicSettings() { - m_infoLabels["device"]->setText("US-144 MKII"); - m_infoLabels["sample_width"]->setText("24 bits"); - - long rate_val = m_alsa.getControlValue("Sample Rate"); - m_infoLabels["sample_rate"]->setText(rate_val > 0 ? QString("%1 kHz").arg(rate_val / 1000.0, 0, 'f', 1) : "N/A (inactive)"); - - updateCombo(m_lineOutCombo, "Line Playback Source"); - updateCombo(m_digitalOutCombo, "Digital Playback Source"); - updateCombo(m_capture12Combo, "Ch1/2 Capture Source"); - updateCombo(m_capture34Combo, "Ch3/4 Capture Source"); -} - -void MainWindow::updateCombo(QComboBox* combo, const std::string& controlName) { - long value = m_alsa.getControlValue(controlName); - combo->blockSignals(true); - combo->setCurrentIndex(static_cast(value)); - combo->blockSignals(false); -} - -void MainWindow::onControlChanged(const std::string& controlName, int index, QComboBox* combo) { - m_alsa.setControlValue(controlName, index); - - if (combo) { - QString originalStyle = combo->styleSheet(); - combo->setStyleSheet(originalStyle + " QComboBox { border: 1px solid #A020F0; }"); - QTimer::singleShot(200, [combo, originalStyle]() { - combo->setStyleSheet(originalStyle); - }); - } -} - -std::pair MainWindow::createControlWidget(const QString& labelText, const QStringList& items) { - auto *container = new QWidget(); - auto *layout = new QVBoxLayout(container); - layout->setContentsMargins(0, 8, 0, 8); - layout->setSpacing(2); - - auto *label = new QLabel(labelText); - label->setObjectName("ControlLabel"); - auto *combo = new QComboBox(); - combo->addItems(items); - - layout->addWidget(label); - layout->addWidget(combo); - - return {container, combo}; -} - -void MainWindow::showAboutDialog() { - if (m_aboutDialog && m_aboutDialog->isVisible()) { - m_aboutDialog->raise(); - m_aboutDialog->activateWindow(); - return; - } - - if (!m_aboutDialog) { - m_aboutDialog = new QDialog(this); - m_aboutDialog->setWindowTitle("About TASCAM US-144MKII Control Panel"); - m_aboutDialog->setWindowIcon(QIcon(":/tascam-control-panel.png")); - m_aboutDialog->setFixedSize(400, 250); - - auto *layout = new QVBoxLayout(m_aboutDialog); - auto *textLabel = new QLabel(m_aboutDialog); - textLabel->setTextFormat(Qt::RichText); - textLabel->setOpenExternalLinks(true); - textLabel->setText(QString("TASCAM US-144MKII Control Panel
" - "Copyright @serifpersia 2025

" - "This application provides a graphical interface to control the TASCAM US-144MKII audio interface on Linux. " - "It utilizes the 'us144mkii' ALSA driver.

" - "For more information, bug reports, and contributions, please visit the GitHub repository:
" - "https://github.com/serifpersia/us144mkii")); - textLabel->setWordWrap(true); - - layout->addWidget(textLabel); - } - - m_aboutDialog->show(); -} - -void MainWindow::paintEvent(QPaintEvent *event) { - QPainter painter(this); - if (!m_background.isNull()) { - painter.drawPixmap(this->rect(), m_background); - } - QWidget::paintEvent(event); -} diff --git a/tascam_controls/src/mainwindow.h b/tascam_controls/src/mainwindow.h deleted file mode 100644 index 6576c35..0000000 --- a/tascam_controls/src/mainwindow.h +++ /dev/null @@ -1,47 +0,0 @@ -#ifndef MAINWINDOW_H -#define MAINWINDOW_H - -#include "alsacontroller.h" -#include -#include -#include - -class QLabel; -class QComboBox; -class QPushButton; -class QDialog; - -class MainWindow : public QWidget { - Q_OBJECT - -public: - explicit MainWindow(QWidget *parent = nullptr); - -protected: - void paintEvent(QPaintEvent *event) override; - -private: - void initUi(); - void loadDynamicSettings(); - std::pair - createControlWidget(const QString &labelText, const QStringList &items); - void updateCombo(QComboBox *combo, const std::string &controlName); - -private slots: - void onControlChanged(const std::string &controlName, int index, - QComboBox *combo); - void showAboutDialog(); - -private: - AlsaController m_alsa; - QPixmap m_background; - - QMap m_infoLabels; - QComboBox *m_capture12Combo; - QComboBox *m_capture34Combo; - QComboBox *m_lineOutCombo; - QComboBox *m_digitalOutCombo; - QDialog *m_aboutDialog; -}; - -#endif \ No newline at end of file diff --git a/tascam_controls/tascam-control-panel.desktop b/tascam_controls/tascam-control-panel.desktop deleted file mode 100644 index 0c39a7d..0000000 --- a/tascam_controls/tascam-control-panel.desktop +++ /dev/null @@ -1,6 +0,0 @@ -[Desktop Entry] -Name=TASCAM US-144MKII Control Panel -Exec=TascamControlPanel -Icon=tascam-control-panel -Type=Application -Categories=AudioVideo;Audio; diff --git a/us144mkii.c b/us144mkii.c index f6572a5..5e5f2a3 100644 --- a/us144mkii.c +++ b/us144mkii.c @@ -1,8 +1,5 @@ // SPDX-License-Identifier: GPL-2.0-only // Copyright (c) 2025 Šerif Rami -/* - * ALSA Driver for TASCAM US-144MKII Audio Interface - */ #include "us144mkii.h" @@ -10,128 +7,98 @@ MODULE_AUTHOR("Šerif Rami "); MODULE_DESCRIPTION("ALSA Driver for TASCAM US-144MKII"); MODULE_LICENSE("GPL"); -/** - * @brief Module parameters for ALSA card instantiation. - * - * These parameters allow users to configure how the ALSA sound card - * for the TASCAM US-144MKII is instantiated. - * - * @param index: Array of integers specifying the ALSA card index for each - * device. Defaults to -1 (automatic). - * @param id: Array of strings specifying the ALSA card ID for each device. - * Defaults to "US144MKII". - * @param enable: Array of booleans to enable or disable each device. - * Defaults to {1, 0, ..., 0} (first device enabled). - * @param dev_idx: Internal counter for the number of TASCAM devices probed. - */ static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; static bool enable[SNDRV_CARDS] = { 1, [1 ...(SNDRV_CARDS - 1)] = 0 }; -static int dev_idx; +static atomic_t dev_idx = ATOMIC_INIT(0); static int tascam_probe(struct usb_interface *intf, - const struct usb_device_id *usb_id); + const struct usb_device_id *usb_id); static void tascam_disconnect(struct usb_interface *intf); static int tascam_suspend(struct usb_interface *intf, pm_message_t message); static int tascam_resume(struct usb_interface *intf); +/** + * tascam_free_urbs - free all URBs + * @tascam: the tascam_card instance + */ void tascam_free_urbs(struct tascam_card *tascam) { int i; usb_kill_anchored_urbs(&tascam->playback_anchor); + usb_kill_anchored_urbs(&tascam->feedback_anchor); + usb_kill_anchored_urbs(&tascam->capture_anchor); + usb_kill_anchored_urbs(&tascam->midi_anchor); + for (i = 0; i < NUM_PLAYBACK_URBS; i++) { if (tascam->playback_urbs[i]) { - usb_free_coherent( - tascam->dev, tascam->playback_urb_alloc_size, - tascam->playback_urbs[i]->transfer_buffer, - tascam->playback_urbs[i]->transfer_dma); + usb_free_coherent(tascam->dev, tascam->playback_urb_alloc_size, + tascam->playback_urbs[i]->transfer_buffer, + tascam->playback_urbs[i]->transfer_dma); usb_free_urb(tascam->playback_urbs[i]); tascam->playback_urbs[i] = NULL; } } - usb_kill_anchored_urbs(&tascam->feedback_anchor); for (i = 0; i < NUM_FEEDBACK_URBS; i++) { if (tascam->feedback_urbs[i]) { - usb_free_coherent( - tascam->dev, tascam->feedback_urb_alloc_size, - tascam->feedback_urbs[i]->transfer_buffer, - tascam->feedback_urbs[i]->transfer_dma); + usb_free_coherent(tascam->dev, tascam->feedback_urb_alloc_size, + tascam->feedback_urbs[i]->transfer_buffer, + tascam->feedback_urbs[i]->transfer_dma); usb_free_urb(tascam->feedback_urbs[i]); tascam->feedback_urbs[i] = NULL; } } - usb_kill_anchored_urbs(&tascam->capture_anchor); for (i = 0; i < NUM_CAPTURE_URBS; i++) { if (tascam->capture_urbs[i]) { - usb_free_coherent( - tascam->dev, tascam->capture_urb_alloc_size, - tascam->capture_urbs[i]->transfer_buffer, - tascam->capture_urbs[i]->transfer_dma); + usb_free_coherent(tascam->dev, CAPTURE_PACKET_SIZE, + tascam->capture_urbs[i]->transfer_buffer, + tascam->capture_urbs[i]->transfer_dma); usb_free_urb(tascam->capture_urbs[i]); tascam->capture_urbs[i] = NULL; } } - usb_kill_anchored_urbs(&tascam->midi_in_anchor); - for (i = 0; i < NUM_MIDI_IN_URBS; i++) { - if (tascam->midi_in_urbs[i]) { - usb_free_coherent( - tascam->dev, MIDI_IN_BUF_SIZE, - tascam->midi_in_urbs[i]->transfer_buffer, - tascam->midi_in_urbs[i]->transfer_dma); - usb_free_urb(tascam->midi_in_urbs[i]); - tascam->midi_in_urbs[i] = NULL; - } + if (tascam->midi_out_urb) { + usb_free_coherent(tascam->dev, MIDI_PACKET_SIZE, + tascam->midi_out_buf, + tascam->midi_out_urb->transfer_dma); + usb_free_urb(tascam->midi_out_urb); + tascam->midi_out_urb = NULL; } - - usb_kill_anchored_urbs(&tascam->midi_out_anchor); - for (i = 0; i < NUM_MIDI_OUT_URBS; i++) { - if (tascam->midi_out_urbs[i]) { - usb_free_coherent( - tascam->dev, MIDI_OUT_BUF_SIZE, - tascam->midi_out_urbs[i]->transfer_buffer, - tascam->midi_out_urbs[i]->transfer_dma); - usb_free_urb(tascam->midi_out_urbs[i]); - tascam->midi_out_urbs[i] = NULL; - } + if (tascam->midi_in_urb) { + usb_free_coherent(tascam->dev, MIDI_PACKET_SIZE, + tascam->midi_in_buf, + tascam->midi_in_urb->transfer_dma); + usb_free_urb(tascam->midi_in_urb); + tascam->midi_in_urb = NULL; } - - kfree(tascam->capture_routing_buffer); - tascam->capture_routing_buffer = NULL; - kfree(tascam->capture_decode_dst_block); - tascam->capture_decode_dst_block = NULL; - kfree(tascam->capture_decode_raw_block); - tascam->capture_decode_raw_block = NULL; - kfree(tascam->capture_ring_buffer); - tascam->capture_ring_buffer = NULL; } +/** + * tascam_alloc_urbs - allocate all URBs + * @tascam: the tascam_card instance + * + * Return: 0 on success, or a negative error code on failure. + */ int tascam_alloc_urbs(struct tascam_card *tascam) { int i; - size_t max_packet_size; - - max_packet_size = ((96000 / 8000) + 2) * BYTES_PER_FRAME; - tascam->playback_urb_alloc_size = - max_packet_size * PLAYBACK_URB_PACKETS; + tascam->playback_urb_alloc_size = PLAYBACK_URB_PACKETS * (12 + 2) * BYTES_PER_FRAME; for (i = 0; i < NUM_PLAYBACK_URBS; i++) { - struct urb *urb = - usb_alloc_urb(PLAYBACK_URB_PACKETS, GFP_KERNEL); + struct urb *urb = usb_alloc_urb(PLAYBACK_URB_PACKETS, GFP_KERNEL); if (!urb) - goto error; + return -ENOMEM; tascam->playback_urbs[i] = urb; - - urb->transfer_buffer = usb_alloc_coherent( - tascam->dev, tascam->playback_urb_alloc_size, - GFP_KERNEL, &urb->transfer_dma); + urb->transfer_buffer = usb_alloc_coherent(tascam->dev, + tascam->playback_urb_alloc_size, + GFP_KERNEL, &urb->transfer_dma); if (!urb->transfer_buffer) - goto error; - + return -ENOMEM; urb->dev = tascam->dev; urb->pipe = usb_sndisocpipe(tascam->dev, EP_AUDIO_OUT); urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; @@ -140,150 +107,67 @@ int tascam_alloc_urbs(struct tascam_card *tascam) urb->complete = playback_urb_complete; } - tascam->feedback_urb_alloc_size = - FEEDBACK_PACKET_SIZE * FEEDBACK_URB_PACKETS; - + tascam->feedback_urb_alloc_size = FEEDBACK_URB_PACKETS * FEEDBACK_PACKET_SIZE; for (i = 0; i < NUM_FEEDBACK_URBS; i++) { - struct urb *f_urb = - usb_alloc_urb(FEEDBACK_URB_PACKETS, GFP_KERNEL); + struct urb *urb = usb_alloc_urb(FEEDBACK_URB_PACKETS, GFP_KERNEL); - if (!f_urb) - goto error; - tascam->feedback_urbs[i] = f_urb; - - f_urb->transfer_buffer = usb_alloc_coherent( - tascam->dev, tascam->feedback_urb_alloc_size, - GFP_KERNEL, &f_urb->transfer_dma); - if (!f_urb->transfer_buffer) - goto error; - - f_urb->dev = tascam->dev; - f_urb->pipe = - usb_rcvisocpipe(tascam->dev, EP_PLAYBACK_FEEDBACK); - f_urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; - f_urb->interval = 4; - f_urb->context = tascam; - f_urb->complete = feedback_urb_complete; + if (!urb) + return -ENOMEM; + tascam->feedback_urbs[i] = urb; + urb->transfer_buffer = usb_alloc_coherent(tascam->dev, + tascam->feedback_urb_alloc_size, + GFP_KERNEL, &urb->transfer_dma); + if (!urb->transfer_buffer) + return -ENOMEM; + urb->dev = tascam->dev; + urb->pipe = usb_rcvisocpipe(tascam->dev, EP_PLAYBACK_FEEDBACK); + urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; + urb->interval = 4; + urb->context = tascam; + urb->complete = feedback_urb_complete; } - tascam->capture_urb_alloc_size = CAPTURE_URB_SIZE; for (i = 0; i < NUM_CAPTURE_URBS; i++) { - struct urb *c_urb = usb_alloc_urb(0, GFP_KERNEL); + struct urb *urb = usb_alloc_urb(0, GFP_KERNEL); - if (!c_urb) - goto error; - tascam->capture_urbs[i] = c_urb; - - c_urb->transfer_buffer = usb_alloc_coherent( - tascam->dev, tascam->capture_urb_alloc_size, GFP_KERNEL, - &c_urb->transfer_dma); - if (!c_urb->transfer_buffer) - goto error; - - usb_fill_bulk_urb(c_urb, tascam->dev, - usb_rcvbulkpipe(tascam->dev, EP_AUDIO_IN), - c_urb->transfer_buffer, - tascam->capture_urb_alloc_size, - capture_urb_complete, tascam); - c_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + if (!urb) + return -ENOMEM; + tascam->capture_urbs[i] = urb; + void *buf = usb_alloc_coherent(tascam->dev, CAPTURE_PACKET_SIZE, + GFP_KERNEL, &urb->transfer_dma); + if (!buf) + return -ENOMEM; + usb_fill_bulk_urb(urb, tascam->dev, + usb_rcvbulkpipe(tascam->dev, EP_AUDIO_IN), + buf, CAPTURE_PACKET_SIZE, + capture_urb_complete, tascam); + urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; } - /* MIDI URB and buffer allocation */ - for (i = 0; i < NUM_MIDI_IN_URBS; i++) { - struct urb *m_urb = usb_alloc_urb(0, GFP_KERNEL); - - if (!m_urb) - goto error; - tascam->midi_in_urbs[i] = m_urb; - m_urb->transfer_buffer = - usb_alloc_coherent(tascam->dev, MIDI_IN_BUF_SIZE, - GFP_KERNEL, &m_urb->transfer_dma); - if (!m_urb->transfer_buffer) - goto error; - usb_fill_bulk_urb(m_urb, tascam->dev, - usb_rcvbulkpipe(tascam->dev, EP_MIDI_IN), - m_urb->transfer_buffer, MIDI_IN_BUF_SIZE, - tascam_midi_in_urb_complete, tascam); - m_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - } - - for (i = 0; i < NUM_MIDI_OUT_URBS; i++) { - struct urb *m_urb = usb_alloc_urb(0, GFP_KERNEL); - - if (!m_urb) - goto error; - tascam->midi_out_urbs[i] = m_urb; - m_urb->transfer_buffer = - usb_alloc_coherent(tascam->dev, MIDI_OUT_BUF_SIZE, - GFP_KERNEL, &m_urb->transfer_dma); - if (!m_urb->transfer_buffer) - goto error; - usb_fill_bulk_urb(m_urb, tascam->dev, - usb_sndbulkpipe(tascam->dev, EP_MIDI_OUT), - m_urb->transfer_buffer, - 0, /* length set later */ - tascam_midi_out_urb_complete, tascam); - m_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; - } - - tascam->capture_ring_buffer = - kmalloc(CAPTURE_RING_BUFFER_SIZE, GFP_KERNEL); - if (!tascam->capture_ring_buffer) - goto error; - - tascam->capture_decode_raw_block = - kmalloc(RAW_BYTES_PER_DECODE_BLOCK, GFP_KERNEL); - if (!tascam->capture_decode_raw_block) - goto error; - - tascam->capture_decode_dst_block = - kmalloc(FRAMES_PER_DECODE_BLOCK * DECODED_CHANNELS_PER_FRAME * - DECODED_SAMPLE_SIZE, - GFP_KERNEL); - if (!tascam->capture_decode_dst_block) - goto error; - - tascam->capture_routing_buffer = - kmalloc(FRAMES_PER_DECODE_BLOCK * DECODED_CHANNELS_PER_FRAME * - DECODED_SAMPLE_SIZE, - GFP_KERNEL); - if (!tascam->capture_routing_buffer) - goto error; - return 0; - -error: - dev_err(tascam->card->dev, "Failed to allocate URBs\n"); - tascam_free_urbs(tascam); - return -ENOMEM; } +/** + * tascam_stop_work_handler - work handler to stop all streams + * @work: pointer to the work_struct + */ void tascam_stop_work_handler(struct work_struct *work) { - struct tascam_card *tascam = - container_of(work, struct tascam_card, stop_work); + struct tascam_card *tascam = container_of(work, struct tascam_card, stop_work); usb_kill_anchored_urbs(&tascam->playback_anchor); usb_kill_anchored_urbs(&tascam->feedback_anchor); usb_kill_anchored_urbs(&tascam->capture_anchor); + usb_kill_anchored_urbs(&tascam->midi_anchor); atomic_set(&tascam->active_urbs, 0); } -/** - * tascam_card_private_free() - Frees private data associated with the sound - * card. - * @card: Pointer to the ALSA sound card instance. - * - * This function is called when the sound card is being freed. It releases - * resources allocated for the tascam_card structure, including the MIDI - * input FIFO and decrements the USB device reference count. - */ static void tascam_card_private_free(struct snd_card *card) { struct tascam_card *tascam = card->private_data; if (tascam) { - kfifo_free(&tascam->midi_in_fifo); + tascam_free_urbs(tascam); if (tascam->dev) { usb_put_dev(tascam->dev); tascam->dev = NULL; @@ -291,17 +175,6 @@ static void tascam_card_private_free(struct snd_card *card) } } -/** - * tascam_suspend() - Handles device suspension. - * @intf: The USB interface being suspended. - * @message: Power management message. - * - * This function is called when the device is suspended. It stops all active - * streams, kills all URBs, and sends a vendor-specific deep sleep command - * to the device to ensure a stable low-power state. - * - * Return: 0 on success. - */ static int tascam_suspend(struct usb_interface *intf, pm_message_t message) { struct tascam_card *tascam = usb_get_intfdata(intf); @@ -310,38 +183,20 @@ static int tascam_suspend(struct usb_interface *intf, pm_message_t message) return 0; snd_pcm_suspend_all(tascam->pcm); - cancel_work_sync(&tascam->stop_work); - cancel_work_sync(&tascam->capture_work); - cancel_work_sync(&tascam->midi_in_work); - cancel_work_sync(&tascam->midi_out_work); cancel_work_sync(&tascam->stop_pcm_work); + usb_kill_anchored_urbs(&tascam->playback_anchor); - usb_kill_anchored_urbs(&tascam->capture_anchor); usb_kill_anchored_urbs(&tascam->feedback_anchor); - usb_kill_anchored_urbs(&tascam->midi_in_anchor); - usb_kill_anchored_urbs(&tascam->midi_out_anchor); - - dev_info(&intf->dev, "sending deep sleep command\n"); - int err = usb_control_msg(tascam->dev, usb_sndctrlpipe(tascam->dev, 0), - VENDOR_REQ_DEEP_SLEEP, RT_H2D_VENDOR_DEV, - 0x0000, 0x0000, NULL, 0, USB_CTRL_TIMEOUT_MS); - if (err < 0) - dev_err(&intf->dev, "deep sleep command failed: %d\n", err); + usb_kill_anchored_urbs(&tascam->capture_anchor); + usb_kill_anchored_urbs(&tascam->midi_anchor); + usb_control_msg(tascam->dev, usb_sndctrlpipe(tascam->dev, 0), + VENDOR_REQ_DEEP_SLEEP, RT_H2D_VENDOR_DEV, + 0x0000, 0x0000, NULL, 0, USB_CTRL_TIMEOUT_MS); return 0; } -/** - * tascam_resume() - Handles device resumption from suspend. - * @intf: The USB interface being resumed. - * - * This function is called when the device resumes from suspend. It - * re-establishes the active USB interface settings and re-configures the sample - * rate if it was previously active. - * - * Return: 0 on success, or a negative error code on failure. - */ static int tascam_resume(struct usb_interface *intf) { struct tascam_card *tascam = usb_get_intfdata(intf); @@ -350,137 +205,66 @@ static int tascam_resume(struct usb_interface *intf) if (!tascam) return 0; - dev_info(&intf->dev, "resuming TASCAM US-144MKII\n"); - - /* - * The device requires a full re-initialization sequence upon resume. - * First, re-establish the active USB interface settings. - */ err = usb_set_interface(tascam->dev, 0, 1); - if (err < 0) { - dev_err(&intf->dev, - "resume: failed to set alt setting on intf 0: %d\n", - err); + if (err < 0) return err; - } err = usb_set_interface(tascam->dev, 1, 1); - if (err < 0) { - dev_err(&intf->dev, - "resume: failed to set alt setting on intf 1: %d\n", - err); + if (err < 0) return err; - } - /* Re-configure the sample rate if one was previously active */ if (tascam->current_rate > 0) - us144mkii_configure_device_for_rate(tascam, - tascam->current_rate); + us144mkii_configure_device_for_rate(tascam, tascam->current_rate); return 0; } -static void tascam_error_timer(struct timer_list *t) -{ - struct tascam_card *tascam = - container_of(t, struct tascam_card, error_timer); - - if (atomic_read(&tascam->midi_in_active)) - schedule_work(&tascam->midi_in_work); - if (atomic_read(&tascam->midi_out_active)) - schedule_work(&tascam->midi_out_work); -} - -/** - * tascam_probe() - Probes for the TASCAM US-144MKII device. - * @intf: The USB interface being probed. - * @usb_id: The USB device ID. - * - * This function is the entry point for the USB driver when a matching device - * is found. It performs initial device setup, including: - * - Checking for the second interface (MIDI) and associating it. - * - Performing a vendor-specific handshake with the device. - * - Setting alternate settings for USB interfaces. - * - Creating and registering the ALSA sound card, PCM device, and MIDI device. - * - Allocating and initializing URBs for audio and MIDI transfers. - * - * Return: 0 on success, or a negative error code on failure. - */ -static int tascam_probe(struct usb_interface *intf, - const struct usb_device_id *usb_id) +static int tascam_probe(struct usb_interface *intf, const struct usb_device_id *usb_id) { struct usb_device *dev = interface_to_usbdev(intf); struct snd_card *card; struct tascam_card *tascam; int err; + int idx; + char *handshake_buf __free(kfree) = NULL; - if (dev->speed != USB_SPEED_HIGH) - dev_info( - &dev->dev, - "Device is connected to a USB 1.1 port, this is not supported.\n"); - /* The device has two interfaces; we drive both from this driver. */ - if (intf->cur_altsetting->desc.bInterfaceNumber == 1) { - tascam = usb_get_intfdata(usb_ifnum_to_if(dev, 0)); - if (tascam) { - usb_set_intfdata(intf, tascam); - tascam->iface1 = intf; - } - return 0; /* Let the core handle this interface */ - } + if (intf->cur_altsetting->desc.bInterfaceNumber == 1) + return 0; - if (dev_idx >= SNDRV_CARDS) { - dev_err(&dev->dev, "Too many TASCAM devices present"); + idx = atomic_fetch_inc(&dev_idx); + if (idx >= SNDRV_CARDS) { + atomic_dec(&dev_idx); return -ENODEV; } - - if (!enable[dev_idx]) { - dev_info(&dev->dev, "TASCAM US-144MKII device disabled"); + if (!enable[idx]) { + atomic_dec(&dev_idx); return -ENOENT; } handshake_buf = kmalloc(1, GFP_KERNEL); - if (!handshake_buf) + if (!handshake_buf) { + atomic_dec(&dev_idx); return -ENOMEM; + } - /* Perform vendor-specific handshake */ err = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), - VENDOR_REQ_MODE_CONTROL, RT_D2H_VENDOR_DEV, - MODE_VAL_HANDSHAKE_READ, 0x0000, handshake_buf, 1, - USB_CTRL_TIMEOUT_MS); + VENDOR_REQ_MODE_CONTROL, RT_D2H_VENDOR_DEV, + MODE_VAL_HANDSHAKE_READ, 0x0000, handshake_buf, 1, + USB_CTRL_TIMEOUT_MS); if (err < 0) { - dev_err(&dev->dev, "Handshake read failed with %d\n", err); + dev_err(&dev->dev, "Handshake failed: %d\n", err); + atomic_dec(&dev_idx); return err; } - if (handshake_buf[0] != 0x12 && handshake_buf[0] != 0x16 && - handshake_buf[0] != 0x30 && handshake_buf[0] != 0x32) { - dev_err(&dev->dev, "Unexpected handshake value: 0x%x\n", - handshake_buf[0]); - return -ENODEV; - } + usb_set_interface(dev, 0, 1); + usb_set_interface(dev, 1, 1); - /* Set alternate settings to enable audio/MIDI endpoints */ - err = usb_set_interface(dev, 0, 1); + err = snd_card_new(&dev->dev, index[idx], id[idx], THIS_MODULE, + sizeof(struct tascam_card), &card); if (err < 0) { - dev_err(&dev->dev, - "Failed to set alt setting 1 on interface 0: %d\n", - err); - return err; - } - - err = usb_set_interface(dev, 1, 1); - if (err < 0) { - dev_err(&dev->dev, - "Failed to set alt setting 1 on interface 1: %d\n", - err); - return err; - } - - err = snd_card_new(&dev->dev, index[dev_idx], id[dev_idx], THIS_MODULE, - sizeof(struct tascam_card), &card); - if (err < 0) { - dev_err(&dev->dev, "Failed to create sound card instance\n"); + atomic_dec(&dev_idx); return err; } @@ -489,90 +273,63 @@ static int tascam_probe(struct usb_interface *intf, tascam->dev = usb_get_dev(dev); tascam->card = card; tascam->iface0 = intf; - tascam->digital_out_source = 1; - tascam->capture_34_source = 1; spin_lock_init(&tascam->lock); - spin_lock_init(&tascam->midi_in_lock); - spin_lock_init(&tascam->midi_out_lock); init_usb_anchor(&tascam->playback_anchor); - init_usb_anchor(&tascam->capture_anchor); init_usb_anchor(&tascam->feedback_anchor); - init_usb_anchor(&tascam->midi_in_anchor); - init_usb_anchor(&tascam->midi_out_anchor); - - timer_setup(&tascam->error_timer, tascam_error_timer, 0); + init_usb_anchor(&tascam->capture_anchor); + init_usb_anchor(&tascam->midi_anchor); INIT_WORK(&tascam->stop_work, tascam_stop_work_handler); INIT_WORK(&tascam->stop_pcm_work, tascam_stop_pcm_work_handler); - INIT_WORK(&tascam->capture_work, tascam_capture_work_handler); - init_completion(&tascam->midi_out_drain_completion); - - if (kfifo_alloc(&tascam->midi_in_fifo, MIDI_IN_FIFO_SIZE, GFP_KERNEL)) { - snd_card_free(card); - return -ENOMEM; - } strscpy(card->driver, DRIVER_NAME, sizeof(card->driver)); - if (le16_to_cpu(dev->descriptor.idProduct) == USB_PID_TASCAM_US144) { - strscpy(card->shortname, "TASCAM US-144", - sizeof(card->shortname)); - } else if (le16_to_cpu(dev->descriptor.idProduct) == USB_PID_TASCAM_US144MKII) { - strscpy(card->shortname, "TASCAM US-144MKII", - sizeof(card->shortname)); - } else { - strscpy(card->shortname, "TASCAM Unknown", - sizeof(card->shortname)); - } + if (le16_to_cpu(dev->descriptor.idProduct) == USB_PID_TASCAM_US144) + strscpy(card->shortname, "US-144", sizeof(card->shortname)); + else + strscpy(card->shortname, "US-144MKII", sizeof(card->shortname)); + snprintf(card->longname, sizeof(card->longname), "%s (%04x:%04x) at %s", - card->shortname, USB_VID_TASCAM, dev->descriptor.idProduct, - dev_name(&dev->dev)); + card->shortname, USB_VID_TASCAM, dev->descriptor.idProduct, + dev_name(&dev->dev)); err = snd_pcm_new(card, "US144MKII PCM", 0, 1, 1, &tascam->pcm); if (err < 0) goto free_card; tascam->pcm->private_data = tascam; strscpy(tascam->pcm->name, "US144MKII PCM", sizeof(tascam->pcm->name)); + snd_pcm_set_ops(tascam->pcm, SNDRV_PCM_STREAM_PLAYBACK, &tascam_playback_ops); + snd_pcm_set_ops(tascam->pcm, SNDRV_PCM_STREAM_CAPTURE, &tascam_capture_ops); - err = tascam_init_pcm(tascam->pcm); - if (err < 0) - goto free_card; + snd_pcm_set_managed_buffer_all(tascam->pcm, SNDRV_DMA_TYPE_VMALLOC, + NULL, 0, 0); err = tascam_create_midi(tascam); if (err < 0) goto free_card; - err = tascam_create_controls(tascam); - if (err < 0) - goto free_card; - err = tascam_alloc_urbs(tascam); if (err < 0) goto free_card; + if (us144mkii_configure_device_for_rate(tascam, 48000) < 0) + dev_warn(&dev->dev, "Failed to initialize device at 48khz\n"); + else + tascam->current_rate = 48000; + err = snd_card_register(card); if (err < 0) goto free_card; usb_set_intfdata(intf, tascam); - - dev_idx++; return 0; free_card: - tascam_free_urbs(tascam); snd_card_free(card); + atomic_dec(&dev_idx); return err; } -/** - * tascam_disconnect() - Disconnects the TASCAM US-144MKII device. - * @intf: The USB interface being disconnected. - * - * This function is called when the device is disconnected from the system. - * It cleans up all allocated resources, including killing URBs, freeing - * the sound card, and releasing memory. - */ static void tascam_disconnect(struct usb_interface *intf) { struct tascam_card *tascam = usb_get_intfdata(intf); @@ -581,30 +338,28 @@ static void tascam_disconnect(struct usb_interface *intf) return; if (intf->cur_altsetting->desc.bInterfaceNumber == 0) { - /* Ensure all deferred work is complete before freeing resources */ - snd_card_disconnect(tascam->card); - cancel_work_sync(&tascam->stop_work); - cancel_work_sync(&tascam->capture_work); - cancel_work_sync(&tascam->midi_in_work); - cancel_work_sync(&tascam->midi_out_work); - cancel_work_sync(&tascam->stop_pcm_work); + atomic_set(&tascam->playback_active, 0); + atomic_set(&tascam->capture_active, 0); usb_kill_anchored_urbs(&tascam->playback_anchor); - usb_kill_anchored_urbs(&tascam->capture_anchor); usb_kill_anchored_urbs(&tascam->feedback_anchor); - usb_kill_anchored_urbs(&tascam->midi_in_anchor); - usb_kill_anchored_urbs(&tascam->midi_out_anchor); - timer_delete_sync(&tascam->error_timer); - tascam_free_urbs(tascam); + usb_kill_anchored_urbs(&tascam->capture_anchor); + usb_kill_anchored_urbs(&tascam->midi_anchor); + + snd_card_disconnect(tascam->card); + cancel_work_sync(&tascam->stop_work); + cancel_work_sync(&tascam->stop_pcm_work); + + usb_set_intfdata(intf, NULL); snd_card_free(tascam->card); - dev_idx--; + atomic_dec(&dev_idx); } } static const struct usb_device_id tascam_usb_ids[] = { { USB_DEVICE(USB_VID_TASCAM, USB_PID_TASCAM_US144) }, { USB_DEVICE(USB_VID_TASCAM, USB_PID_TASCAM_US144MKII) }, - { /* Terminating entry */ } + { } }; MODULE_DEVICE_TABLE(usb, tascam_usb_ids); diff --git a/us144mkii.h b/us144mkii.h index ecc4c2f..f600be6 100644 --- a/us144mkii.h +++ b/us144mkii.h @@ -4,32 +4,27 @@ #ifndef __US144MKII_H #define __US144MKII_H -#include #include #include #include -#include +#include #include #include #include #include #define DRIVER_NAME "us144mkii" -#define DRIVER_VERSION "1.7.6" -/* --- USB Device Identification --- */ #define USB_VID_TASCAM 0x0644 #define USB_PID_TASCAM_US144 0x800f #define USB_PID_TASCAM_US144MKII 0x8020 -/* --- USB Endpoints (Alternate Setting 1) --- */ #define EP_PLAYBACK_FEEDBACK 0x81 #define EP_AUDIO_OUT 0x02 #define EP_MIDI_IN 0x83 #define EP_MIDI_OUT 0x04 #define EP_AUDIO_IN 0x86 -/* --- USB Control Message Protocol --- */ #define RT_H2D_CLASS_EP (USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT) #define RT_D2H_CLASS_EP (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT) #define RT_H2D_VENDOR_DEV (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE) @@ -56,8 +51,6 @@ enum tascam_mode_value { MODE_VAL_STREAM_START = 0x0030, }; -#define HANDSHAKE_SUCCESS_VAL 0x12 - enum tascam_register { REG_ADDR_UNKNOWN_0D = 0x0d04, REG_ADDR_UNKNOWN_0E = 0x0e00, @@ -71,298 +64,130 @@ enum tascam_register { #define REG_VAL_ENABLE 0x0101 -/* --- URB Configuration --- */ -#define NUM_PLAYBACK_URBS 4 -#define PLAYBACK_URB_PACKETS 8 -#define NUM_FEEDBACK_URBS 4 +#define NUM_PLAYBACK_URBS 8 +#define PLAYBACK_URB_PACKETS 2 +#define NUM_FEEDBACK_URBS 2 #define FEEDBACK_URB_PACKETS 1 #define FEEDBACK_PACKET_SIZE 3 -#define NUM_CAPTURE_URBS 8 -#define CAPTURE_URB_SIZE 512 -#define CAPTURE_RING_BUFFER_SIZE (CAPTURE_URB_SIZE * NUM_CAPTURE_URBS * 4) -#define NUM_MIDI_IN_URBS 4 -#define MIDI_IN_BUF_SIZE 64 -#define MIDI_IN_FIFO_SIZE (MIDI_IN_BUF_SIZE * NUM_MIDI_IN_URBS) -#define MIDI_OUT_BUF_SIZE 64 -#define NUM_MIDI_OUT_URBS 4 -#define USB_CTRL_TIMEOUT_MS 1000 -#define FEEDBACK_SYNC_LOSS_THRESHOLD 41 +#define NUM_CAPTURE_URBS 4 +#define CAPTURE_PACKET_SIZE 512 + +#define MIDI_PACKET_SIZE 9 +#define MIDI_PAYLOAD_SIZE 8 -/* --- Audio Format Configuration --- */ #define BYTES_PER_SAMPLE 3 #define NUM_CHANNELS 4 #define BYTES_PER_FRAME (NUM_CHANNELS * BYTES_PER_SAMPLE) -#define FEEDBACK_ACCUMULATOR_SIZE 128 -/* --- Capture Decoding Defines --- */ -#define DECODED_CHANNELS_PER_FRAME 4 -#define DECODED_SAMPLE_SIZE 4 -#define FRAMES_PER_DECODE_BLOCK 8 -#define RAW_BYTES_PER_DECODE_BLOCK 512 +#define PLL_FILTER_OLD_WEIGHT 3 +#define PLL_FILTER_NEW_WEIGHT 1 +#define PLL_FILTER_DIVISOR (PLL_FILTER_OLD_WEIGHT + PLL_FILTER_NEW_WEIGHT) + +#define USB_CTRL_TIMEOUT_MS 1000 /** - * struct us144mkii_frame_pattern_observer - State for dynamic feedback - * patterns. - * @sample_rate_khz: The current sample rate in kHz. - * @base_feedback_value: The nominal feedback value for the current rate. - * @feedback_offset: An offset to align the feedback value range. - * @full_frame_patterns: A 2D array of pre-calculated packet size patterns. - * @current_index: The current index into the pattern array. - * @previous_index: The previous index, used for state tracking. - * @sync_locked: A flag indicating if the pattern has locked to the stream. - */ -struct us144mkii_frame_pattern_observer { - unsigned int sample_rate_khz; - unsigned int base_feedback_value; - int feedback_offset; - unsigned int full_frame_patterns[5][8]; - unsigned int current_index; - unsigned int previous_index; - bool sync_locked; -}; - -/** - * struct tascam_card - Main driver data structure for the TASCAM US-144MKII. - * @dev: Pointer to the USB device. - * @iface0: Pointer to USB interface 0 (audio). - * @iface1: Pointer to USB interface 1 (MIDI). - * @card: Pointer to the ALSA sound card instance. - * @pcm: Pointer to the ALSA PCM device. - * @rmidi: Pointer to the ALSA rawmidi device. - * - * @playback_substream: Pointer to the active playback PCM substream. - * @playback_urbs: Array of URBs for playback. - * @playback_urb_alloc_size: Size of allocated buffer for each playback URB. - * @feedback_urbs: Array of URBs for feedback. - * @feedback_urb_alloc_size: Size of allocated buffer for each feedback URB. - * @playback_active: Atomic flag indicating if playback is active. - * @playback_frames_consumed: Total frames consumed by playback. - * @driver_playback_pos: Current position in the ALSA playback buffer (frames). - * @last_period_pos: Last reported period position for playback. - * - * @capture_substream: Pointer to the active capture PCM substream. - * @capture_urbs: Array of URBs for capture. - * @capture_urb_alloc_size: Size of allocated buffer for each capture URB. - * @capture_active: Atomic flag indicating if capture is active. - * @driver_capture_pos: Current position in the ALSA capture buffer (frames). - * @capture_frames_processed: Total frames processed for capture. - * @last_capture_period_pos: Last reported period position for capture. - * @capture_ring_buffer: Ring buffer for raw capture data from USB. - * @capture_ring_buffer_read_ptr: Read pointer for the capture ring buffer. - * @capture_ring_buffer_write_ptr: Write pointer for the capture ring buffer. - * @capture_decode_raw_block: Buffer for a raw 512-byte capture block. - * @capture_decode_dst_block: Buffer for decoded 32-bit capture samples. - * @capture_routing_buffer: Intermediate buffer for capture routing. - * @capture_work: Work struct for deferred capture processing. - * @stop_work: Work struct for deferred stream stopping. - * @stop_pcm_work: Work struct for stopping PCM due to a fatal error (e.g. - * xrun). - * - * @midi_in_substream: Pointer to the active MIDI input substream. - * @midi_out_substream: Pointer to the active MIDI output substream. - * @midi_in_urbs: Array of URBs for MIDI input. - * @midi_out_urbs: Array of URBs for MIDI output. - * @midi_in_active: Atomic flag indicating if MIDI input is active. - * @midi_out_active: Atomic flag indicating if MIDI output is active. - * @midi_in_fifo: FIFO for raw MIDI input data. - * @midi_in_work: Work struct for deferred MIDI input processing. - * @midi_out_work: Work struct for deferred MIDI output processing. - * @midi_in_lock: Spinlock for MIDI input FIFO. - * @midi_out_lock: Spinlock for MIDI output. - * @midi_out_urbs_in_flight: Bitmap of MIDI output URBs currently in flight. - * @midi_running_status: Stores the last MIDI status byte for running status. - * @error_timer: Timer for MIDI error retry logic. - * - * @lock: Main spinlock for protecting shared driver state. - * @active_urbs: Atomic counter for active URBs. - * @current_rate: Currently configured sample rate of the device. - * @line_out_source: Source for Line Outputs (0: Playback 1-2, 1: Playback 3-4). - * @digital_out_source: Source for Digital Outputs (0: Playback 1-2, 1: Playback - * 3-4). - * @capture_12_source: Source for Capture channels 1-2 (0: Analog In, 1: Digital - * In). - * @capture_34_source: Source for Capture channels 3-4 (0: Analog In, 1: Digital - * In). - * - * @feedback_accumulator_pattern: Stores the calculated frames per packet for - * feedback. - * @feedback_pattern_out_idx: Read index for feedback_accumulator_pattern. - * @feedback_pattern_in_idx: Write index for feedback_accumulator_pattern. - * @feedback_synced: Flag indicating if feedback is synced. - * @feedback_consecutive_errors: Counter for consecutive feedback errors. - * @feedback_urb_skip_count: Number of feedback URBs to skip initially for - * stabilization. - * @fpo: Holds the state for the dynamic feedback pattern generation. - * - * @playback_anchor: USB anchor for playback URBs. - * @capture_anchor: USB anchor for capture URBs. - * @feedback_anchor: USB anchor for feedback URBs. - * @midi_in_anchor: USB anchor for MIDI input URBs. - * @midi_out_anchor: USB anchor for MIDI output URBs. + * struct tascam_card - private data for the TASCAM US-144MKII driver + * @dev: pointer to the USB device + * @iface0: pointer to the first interface + * @card: pointer to the ALSA sound card + * @pcm: pointer to the ALSA PCM device + * @rmidi: pointer to the ALSA raw MIDI device + * @playback_substream: pointer to the PCM playback substream + * @capture_substream: pointer to the PCM capture substream + * @playback_urbs: array of URBs for PCM playback + * @playback_urb_alloc_size: allocated size of each playback URB + * @feedback_urbs: array of URBs for feedback + * @feedback_urb_alloc_size: allocated size of each feedback URB + * @capture_urbs: array of URBs for PCM capture + * @playback_anchor: anchor for playback URBs + * @feedback_anchor: anchor for feedback URBs + * @capture_anchor: anchor for capture URBs + * @midi_input: pointer to the MIDI input substream + * @midi_output: pointer to the MIDI output substream + * @midi_in_urb: URB for MIDI input + * @midi_out_urb: URB for MIDI output + * @midi_in_buf: buffer for MIDI input + * @midi_out_buf: buffer for MIDI output + * @midi_anchor: anchor for MIDI URBs + * @midi_out_active: flag indicating if MIDI output is active + * @midi_lock: spinlock for MIDI operations + * @lock: spinlock for PCM operations + * @playback_active: atomic flag indicating if PCM playback is active + * @capture_active: atomic flag indicating if PCM capture is active + * @active_urbs: atomic counter for active URBs + * @current_rate: current sample rate + * @playback_frames_consumed: number of frames consumed by the playback device + * @driver_playback_pos: playback position in the ring buffer + * @last_pb_period_pos: last playback period position + * @capture_frames_processed: number of frames processed from the capture device + * @driver_capture_pos: capture position in the ring buffer + * @last_cap_period_pos: last capture period position + * @phase_accum: phase accumulator for the playback PLL + * @freq_q16: current frequency for the playback PLL in Q16.16 format + * @feedback_synced: flag indicating if feedback is synced + * @feedback_urb_skip_count: number of feedback URBs to skip at startup + * @stop_work: work struct for stopping all streams + * @stop_pcm_work: work struct for stopping PCM streams */ struct tascam_card { - /* --- Core device pointers --- */ struct usb_device *dev; struct usb_interface *iface0; - struct usb_interface *iface1; struct snd_card *card; struct snd_pcm *pcm; struct snd_rawmidi *rmidi; - /* --- PCM Substreams --- */ struct snd_pcm_substream *playback_substream; struct snd_pcm_substream *capture_substream; - /* --- URBs and Anchors --- */ struct urb *playback_urbs[NUM_PLAYBACK_URBS]; size_t playback_urb_alloc_size; struct urb *feedback_urbs[NUM_FEEDBACK_URBS]; size_t feedback_urb_alloc_size; struct urb *capture_urbs[NUM_CAPTURE_URBS]; - size_t capture_urb_alloc_size; - struct urb *midi_in_urbs[NUM_MIDI_IN_URBS]; - struct urb *midi_out_urbs[NUM_MIDI_OUT_URBS]; - struct usb_anchor playback_anchor; - struct usb_anchor capture_anchor; - struct usb_anchor feedback_anchor; - struct usb_anchor midi_in_anchor; - struct usb_anchor midi_out_anchor; - /* --- Stream State --- */ + struct usb_anchor playback_anchor; + struct usb_anchor feedback_anchor; + struct usb_anchor capture_anchor; + + struct snd_rawmidi_substream *midi_input; + struct snd_rawmidi_substream *midi_output; + struct urb *midi_in_urb; + struct urb *midi_out_urb; + u8 *midi_in_buf; + u8 *midi_out_buf; + struct usb_anchor midi_anchor; + bool midi_out_active; + spinlock_t midi_lock; + spinlock_t lock; atomic_t playback_active; atomic_t capture_active; atomic_t active_urbs; int current_rate; - /* --- Playback State --- */ u64 playback_frames_consumed; snd_pcm_uframes_t driver_playback_pos; - u64 last_period_pos; + u64 last_pb_period_pos; - /* --- Capture State --- */ u64 capture_frames_processed; snd_pcm_uframes_t driver_capture_pos; - u64 last_capture_period_pos; - u8 *capture_ring_buffer; - size_t capture_ring_buffer_read_ptr; - size_t capture_ring_buffer_write_ptr; - u8 *capture_decode_raw_block; - s32 *capture_decode_dst_block; - s32 *capture_routing_buffer; + u64 last_cap_period_pos; - /* --- MIDI State --- */ - struct snd_rawmidi_substream *midi_in_substream; - struct snd_rawmidi_substream *midi_out_substream; - atomic_t midi_in_active; - atomic_t midi_out_active; - struct kfifo midi_in_fifo; - spinlock_t midi_in_lock; - spinlock_t midi_out_lock; - unsigned long midi_out_urbs_in_flight; - u8 midi_running_status; - struct timer_list error_timer; - struct completion midi_out_drain_completion; - - /* --- Feedback Sync State --- */ - unsigned int feedback_accumulator_pattern[FEEDBACK_ACCUMULATOR_SIZE]; - unsigned int feedback_pattern_out_idx; - unsigned int feedback_pattern_in_idx; + u32 phase_accum; + u32 freq_q16; bool feedback_synced; - unsigned int feedback_consecutive_errors; unsigned int feedback_urb_skip_count; - struct us144mkii_frame_pattern_observer fpo; - /* --- Workqueues --- */ struct work_struct stop_work; struct work_struct stop_pcm_work; - struct work_struct capture_work; - struct work_struct midi_in_work; - struct work_struct midi_out_work; - - /* --- Mixer/Routing State --- */ - unsigned int line_out_source; - unsigned int digital_out_source; - unsigned int capture_12_source; - unsigned int capture_34_source; }; -/* main.c */ -/** - * tascam_free_urbs() - Free all allocated URBs and associated buffers. - * @tascam: the tascam_card instance - * - * This function kills, unlinks, and frees all playback, feedback, capture, - * and MIDI URBs, along with their transfer buffers and the capture - * ring/decode buffers. - */ void tascam_free_urbs(struct tascam_card *tascam); - -/** - * tascam_alloc_urbs() - Allocate all URBs and associated buffers. - * @tascam: the tascam_card instance - * - * This function allocates and initializes all URBs for playback, feedback, - * capture, and MIDI, as well as the necessary buffers for data processing. - * - * Return: 0 on success, or a negative error code on failure. - */ int tascam_alloc_urbs(struct tascam_card *tascam); - -/** - * tascam_stop_work_handler() - Work handler to stop all active streams. - * @work: Pointer to the work_struct. - * - * This function is scheduled to stop all active URBs (playback, feedback, - * capture) and reset the active_urbs counter. - */ void tascam_stop_work_handler(struct work_struct *work); -/* us144mkii_pcm.h */ #include "us144mkii_pcm.h" -/* us144mkii_midi.c */ -/** - * tascam_midi_in_urb_complete() - Completion handler for MIDI IN URBs - * @urb: The completed URB. - * - * This function runs in interrupt context. It places the raw data from the - * USB endpoint into a kfifo and schedules a work item to process it later, - * ensuring the interrupt handler remains fast. - */ -void tascam_midi_in_urb_complete(struct urb *urb); - -/** - * tascam_midi_out_urb_complete() - Completion handler for MIDI OUT bulk URB. - * @urb: The completed URB. - * - * This function runs in interrupt context. It marks the output URB as no - * longer in-flight. It then re-schedules the work handler to check for and - * send any more data waiting in the ALSA buffer. This is a safe, non-blocking - * way to continue the data transmission chain. - */ -void tascam_midi_out_urb_complete(struct urb *urb); - -/** - * tascam_create_midi() - Create and initialize the ALSA rawmidi device. - * @tascam: The driver instance. - * - * Return: 0 on success, or a negative error code on failure. - */ int tascam_create_midi(struct tascam_card *tascam); -/* us144mkii_controls.c */ -/** - * tascam_create_controls() - Creates and adds ALSA mixer controls for the - * device. - * @tascam: The driver instance. - * - * This function registers custom ALSA controls for managing audio routing - * (line out source, digital out source, capture 1-2 source, capture 3-4 source) - * and displaying the current sample rate. - * - * Return: 0 on success, or a negative error code on failure. - */ -int tascam_create_controls(struct tascam_card *tascam); - #endif /* __US144MKII_H */ diff --git a/us144mkii_capture.c b/us144mkii_capture.c index 00188ff..ae6f974 100644 --- a/us144mkii_capture.c +++ b/us144mkii_capture.c @@ -1,319 +1,268 @@ // SPDX-License-Identifier: GPL-2.0-only // Copyright (c) 2025 Šerif Rami -#include "us144mkii.h" +#include "us144mkii_pcm.h" + +const struct snd_pcm_hardware tascam_capture_hw = { + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), + .formats = SNDRV_PCM_FMTBIT_S32_LE, + .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000), + .rate_min = 44100, + .rate_max = 96000, + .channels_min = NUM_CHANNELS, + .channels_max = NUM_CHANNELS, + .buffer_bytes_max = 1024 * 1024, + .period_bytes_min = 32 * BYTES_PER_FRAME, + .period_bytes_max = 1024 * BYTES_PER_FRAME, + .periods_min = 2, + .periods_max = 1024, +}; -/** - * tascam_capture_open() - Opens the PCM capture substream. - * @substream: The ALSA PCM substream to open. - * - * This function sets the hardware parameters for the capture substream - * and stores a reference to the substream in the driver's private data. - * - * Return: 0 on success. - */ static int tascam_capture_open(struct snd_pcm_substream *substream) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); - substream->runtime->hw = tascam_pcm_hw; + substream->runtime->hw = tascam_capture_hw; tascam->capture_substream = substream; atomic_set(&tascam->capture_active, 0); - return 0; } -/** - * tascam_capture_close() - Closes the PCM capture substream. - * @substream: The ALSA PCM substream to close. - * - * This function clears the reference to the capture substream in the - * driver's private data. - * - * Return: 0 on success. - */ static int tascam_capture_close(struct snd_pcm_substream *substream) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); tascam->capture_substream = NULL; - return 0; } -/** - * tascam_capture_prepare() - Prepares the PCM capture substream for use. - * @substream: The ALSA PCM substream to prepare. - * - * This function initializes capture-related counters and ring buffer pointers. - * - * Return: 0 on success. - */ static int tascam_capture_prepare(struct snd_pcm_substream *substream) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); + usb_kill_anchored_urbs(&tascam->capture_anchor); + tascam->driver_capture_pos = 0; tascam->capture_frames_processed = 0; - tascam->last_capture_period_pos = 0; - tascam->capture_ring_buffer_read_ptr = 0; - tascam->capture_ring_buffer_write_ptr = 0; - + tascam->last_cap_period_pos = 0; return 0; } -/** - * tascam_capture_pointer() - Returns the current capture pointer position. - * @substream: The ALSA PCM substream. - * - * This function returns the current position of the capture pointer within - * the ALSA ring buffer, in frames. - * - * Return: The current capture pointer position in frames. - */ -static snd_pcm_uframes_t -tascam_capture_pointer(struct snd_pcm_substream *substream) +static snd_pcm_uframes_t tascam_capture_pointer(struct snd_pcm_substream *substream) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; + unsigned long flags; u64 pos; + snd_pcm_uframes_t buffer_size = substream->runtime->buffer_size; if (!atomic_read(&tascam->capture_active)) return 0; + spin_lock_irqsave(&tascam->lock, flags); + pos = tascam->capture_frames_processed; + spin_unlock_irqrestore(&tascam->lock, flags); - scoped_guard(spinlock_irqsave, &tascam->lock) { - pos = tascam->capture_frames_processed; + return (snd_pcm_uframes_t)(pos % buffer_size); +} + +static int tascam_capture_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct tascam_card *tascam = snd_pcm_substream_chip(substream); + int i, ret = 0; + bool start = false; + bool stop = false; + unsigned long flags; + + spin_lock_irqsave(&tascam->lock, flags); + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + if (!atomic_read(&tascam->capture_active)) { + atomic_set(&tascam->capture_active, 1); + start = true; + } + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + atomic_set(&tascam->capture_active, 0); + stop = true; + break; + default: + ret = -EINVAL; + break; + } + spin_unlock_irqrestore(&tascam->lock, flags); + + if (stop) { + /* Ensure capture_active is updated before unlinking URBs */ + smp_mb(); + for (i = 0; i < NUM_CAPTURE_URBS; i++) { + if (tascam->capture_urbs[i]) + usb_unlink_urb(tascam->capture_urbs[i]); + } } - if (runtime->buffer_size == 0) - return 0; + if (start) { + for (i = 0; i < NUM_CAPTURE_URBS; i++) { + usb_anchor_urb(tascam->capture_urbs[i], &tascam->capture_anchor); + if (usb_submit_urb(tascam->capture_urbs[i], GFP_ATOMIC) < 0) { + usb_unanchor_urb(tascam->capture_urbs[i]); + atomic_set(&tascam->capture_active, 0); + /* Ensure capture_active is cleared before unlinking URBs */ + smp_mb(); + for (int j = 0; j < i; j++) + usb_unlink_urb(tascam->capture_urbs[j]); + ret = -EIO; + break; + } + atomic_inc(&tascam->active_urbs); + } + } + return ret; +} - return do_div(pos, runtime->buffer_size); +static inline u8 tascam_pack_byte(const u8 *src, int bit_offset) +{ + return (((src[0] >> bit_offset) & 1) << 7) | + (((src[1] >> bit_offset) & 1) << 6) | + (((src[2] >> bit_offset) & 1) << 5) | + (((src[3] >> bit_offset) & 1) << 4) | + (((src[4] >> bit_offset) & 1) << 3) | + (((src[5] >> bit_offset) & 1) << 2) | + (((src[6] >> bit_offset) & 1) << 1) | + (((src[7] >> bit_offset) & 1)); +} + +static void tascam_decode_capture_chunk(const u8 *src, u32 *dst, int frames_to_decode) +{ + int frame; + u8 h, m, l; + + for (frame = 0; frame < frames_to_decode; frame++) { + const u8 *p_src_a = src + (frame * 64); + const u8 *p_src_b = src + (frame * 64) + 32; + + h = tascam_pack_byte(p_src_a, 0); + m = tascam_pack_byte(p_src_a + 8, 0); + l = tascam_pack_byte(p_src_a + 16, 0); + *dst++ = (h << 24) | (m << 16) | (l << 8); + + h = tascam_pack_byte(p_src_b, 0); + m = tascam_pack_byte(p_src_b + 8, 0); + l = tascam_pack_byte(p_src_b + 16, 0); + *dst++ = (h << 24) | (m << 16) | (l << 8); + + h = tascam_pack_byte(p_src_a, 1); + m = tascam_pack_byte(p_src_a + 8, 1); + l = tascam_pack_byte(p_src_a + 16, 1); + *dst++ = (h << 24) | (m << 16) | (l << 8); + + h = tascam_pack_byte(p_src_b, 1); + m = tascam_pack_byte(p_src_b + 8, 1); + l = tascam_pack_byte(p_src_b + 16, 1); + *dst++ = (h << 24) | (m << 16) | (l << 8); + } } /** - * tascam_capture_ops - ALSA PCM operations for capture. + * capture_urb_complete() - completion handler for capture bulk URBs + * @urb: the completed URB * - * This structure defines the callback functions for capture stream operations, - * including open, close, ioctl, hardware parameters, hardware free, prepare, - * trigger, and pointer. + * This function runs in interrupt context. It copies the received raw data + * into an intermediate ring buffer and then schedules the workqueue to process + * it. It then resubmits the URB to receive more data. */ +void capture_urb_complete(struct urb *urb) +{ + struct tascam_card *tascam = urb->context; + struct snd_pcm_substream *substream; + struct snd_pcm_runtime *runtime; + unsigned long flags; + int frames_received; + snd_pcm_uframes_t write_pos; + snd_pcm_uframes_t buffer_size, period_size; + bool need_period_elapsed = false; + + if (!tascam) + return; + + if (urb->status) { + atomic_dec(&tascam->active_urbs); + return; + } + + if (!atomic_read(&tascam->capture_active)) { + atomic_dec(&tascam->active_urbs); + return; + } + + substream = tascam->capture_substream; + if (!substream) { + atomic_dec(&tascam->active_urbs); + return; + } + runtime = substream->runtime; + if (!runtime) { + atomic_dec(&tascam->active_urbs); + return; + } + + buffer_size = runtime->buffer_size; + period_size = runtime->period_size; + frames_received = urb->actual_length / 64; + + if (frames_received > 0) { + spin_lock_irqsave(&tascam->lock, flags); + write_pos = tascam->driver_capture_pos; + spin_unlock_irqrestore(&tascam->lock, flags); + + u32 *dma_ptr = (u32 *)(runtime->dma_area + frames_to_bytes(runtime, write_pos)); + + if (write_pos + frames_received <= buffer_size) { + tascam_decode_capture_chunk(urb->transfer_buffer, dma_ptr, frames_received); + } else { + int part1 = buffer_size - write_pos; + int part2 = frames_received - part1; + + tascam_decode_capture_chunk(urb->transfer_buffer, dma_ptr, part1); + tascam_decode_capture_chunk(urb->transfer_buffer + (part1 * 64), (u32 *)runtime->dma_area, part2); + } + + spin_lock_irqsave(&tascam->lock, flags); + tascam->driver_capture_pos += frames_received; + if (tascam->driver_capture_pos >= buffer_size) + tascam->driver_capture_pos -= buffer_size; + + tascam->capture_frames_processed += frames_received; + + if (period_size > 0) { + u64 current_period = div_u64(tascam->capture_frames_processed, period_size); + + if (current_period > tascam->last_cap_period_pos) { + tascam->last_cap_period_pos = current_period; + need_period_elapsed = true; + } + } + spin_unlock_irqrestore(&tascam->lock, flags); + + if (need_period_elapsed) + snd_pcm_period_elapsed(substream); + } + + if (usb_submit_urb(urb, GFP_ATOMIC) < 0) + atomic_dec(&tascam->active_urbs); +} + const struct snd_pcm_ops tascam_capture_ops = { .open = tascam_capture_open, .close = tascam_capture_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = tascam_pcm_hw_params, - .hw_free = tascam_pcm_hw_free, + .hw_free = NULL, .prepare = tascam_capture_prepare, - .trigger = tascam_pcm_trigger, + .trigger = tascam_capture_trigger, .pointer = tascam_capture_pointer, }; - -/** - * decode_tascam_capture_block() - Decodes a raw 512-byte block from the device. - * @src_block: Pointer to the 512-byte raw source block. - * @dst_block: Pointer to the destination buffer for decoded audio frames. - * - * The device sends audio data in a complex, multiplexed format. This function - * demultiplexes the bits from the raw block into 8 frames of 4-channel, - * 24-bit audio (stored in 32-bit containers). - */ -static void decode_tascam_capture_block(const u8 *src_block, s32 *dst_block) -{ - int frame, bit; - - memset(dst_block, 0, - FRAMES_PER_DECODE_BLOCK * DECODED_CHANNELS_PER_FRAME * - DECODED_SAMPLE_SIZE); - - for (frame = 0; frame < FRAMES_PER_DECODE_BLOCK; ++frame) { - const u8 *p_src_frame_base = src_block + frame * 64; - s32 *p_dst_frame = dst_block + frame * 4; - - s32 ch[4] = { 0 }; - - for (bit = 0; bit < 24; ++bit) { - u8 byte1 = p_src_frame_base[bit]; - u8 byte2 = p_src_frame_base[bit + 32]; - - ch[0] = (ch[0] << 1) | (byte1 & 1); - ch[2] = (ch[2] << 1) | ((byte1 >> 1) & 1); - - ch[1] = (ch[1] << 1) | (byte2 & 1); - ch[3] = (ch[3] << 1) | ((byte2 >> 1) & 1); - } - - /* - * The result is a 24-bit sample. Shift left by 8 to align it to - * the most significant bits of a 32-bit integer (S32_LE format). - */ - p_dst_frame[0] = ch[0] << 8; - p_dst_frame[1] = ch[1] << 8; - p_dst_frame[2] = ch[2] << 8; - p_dst_frame[3] = ch[3] << 8; - } -} - -void tascam_capture_work_handler(struct work_struct *work) -{ - struct tascam_card *tascam = - container_of(work, struct tascam_card, capture_work); - struct snd_pcm_substream *substream = tascam->capture_substream; - struct snd_pcm_runtime *runtime; - u8 *raw_block = tascam->capture_decode_raw_block; - s32 *decoded_block = tascam->capture_decode_dst_block; - s32 *routed_block = tascam->capture_routing_buffer; - - if (!substream || !substream->runtime) - return; - runtime = substream->runtime; - - if (!raw_block || !decoded_block || !routed_block) { - dev_err(tascam->card->dev, - "Capture decode/routing buffers not allocated!\n"); - return; - } - - while (atomic_read(&tascam->capture_active)) { - size_t write_ptr, read_ptr, available_data; - bool can_process; - - scoped_guard(spinlock_irqsave, &tascam->lock) { - write_ptr = tascam->capture_ring_buffer_write_ptr; - read_ptr = tascam->capture_ring_buffer_read_ptr; - available_data = (write_ptr >= read_ptr) ? - (write_ptr - read_ptr) : - (CAPTURE_RING_BUFFER_SIZE - - read_ptr + write_ptr); - can_process = - (available_data >= RAW_BYTES_PER_DECODE_BLOCK); - - if (can_process) { - size_t bytes_to_end = - CAPTURE_RING_BUFFER_SIZE - read_ptr; - if (bytes_to_end >= - RAW_BYTES_PER_DECODE_BLOCK) { - memcpy(raw_block, - tascam->capture_ring_buffer + - read_ptr, - RAW_BYTES_PER_DECODE_BLOCK); - } else { - memcpy(raw_block, - tascam->capture_ring_buffer + - read_ptr, - bytes_to_end); - memcpy(raw_block + bytes_to_end, - tascam->capture_ring_buffer, - RAW_BYTES_PER_DECODE_BLOCK - - bytes_to_end); - } - tascam->capture_ring_buffer_read_ptr = - (read_ptr + - RAW_BYTES_PER_DECODE_BLOCK) % - CAPTURE_RING_BUFFER_SIZE; - } - } - - if (!can_process) - break; - - decode_tascam_capture_block(raw_block, decoded_block); - process_capture_routing_us144mkii(tascam, decoded_block, - routed_block); - - scoped_guard(spinlock_irqsave, &tascam->lock) { - if (atomic_read(&tascam->capture_active)) { - int f; - - for (f = 0; f < FRAMES_PER_DECODE_BLOCK; ++f) { - u8 *dst_frame_start = - runtime->dma_area + - frames_to_bytes( - runtime, - tascam->driver_capture_pos); - s32 *routed_frame_start = - routed_block + - (f * NUM_CHANNELS); - int c; - - for (c = 0; c < NUM_CHANNELS; c++) { - u8 *dst_channel = - dst_frame_start + - (c * BYTES_PER_SAMPLE); - s32 *src_channel_s32 = - routed_frame_start + c; - - memcpy(dst_channel, - ((char *)src_channel_s32) + - 1, - 3); - } - - tascam->driver_capture_pos = - (tascam->driver_capture_pos + - 1) % - runtime->buffer_size; - } - } - } - } -} - -void capture_urb_complete(struct urb *urb) -{ - struct tascam_card *tascam = urb->context; - int ret; - - if (urb->status) { - if (urb->status != -ENOENT && urb->status != -ECONNRESET && - urb->status != -ESHUTDOWN && urb->status != -ENODEV && - urb->status != -EPROTO) - dev_err_ratelimited(tascam->card->dev, - "Capture URB failed: %d\n", - urb->status); - goto out; - } - if (!tascam || !atomic_read(&tascam->capture_active)) - goto out; - - if (urb->actual_length > 0) { - scoped_guard(spinlock_irqsave, &tascam->lock) { - size_t write_ptr = tascam->capture_ring_buffer_write_ptr; - size_t bytes_to_end = CAPTURE_RING_BUFFER_SIZE - write_ptr; - - if (urb->actual_length > bytes_to_end) { - memcpy(tascam->capture_ring_buffer + write_ptr, - urb->transfer_buffer, bytes_to_end); - memcpy(tascam->capture_ring_buffer, - urb->transfer_buffer + bytes_to_end, - urb->actual_length - bytes_to_end); - } else { - memcpy(tascam->capture_ring_buffer + write_ptr, - urb->transfer_buffer, - urb->actual_length); - } - - tascam->capture_ring_buffer_write_ptr = - (write_ptr + urb->actual_length) % - CAPTURE_RING_BUFFER_SIZE; - } - - schedule_work(&tascam->capture_work); - } - - usb_get_urb(urb); - usb_anchor_urb(urb, &tascam->capture_anchor); - ret = usb_submit_urb(urb, GFP_ATOMIC); - if (ret < 0) { - dev_err_ratelimited(tascam->card->dev, - "Failed to resubmit capture URB: %d\n", - ret); - usb_unanchor_urb(urb); - usb_put_urb(urb); - atomic_dec( - &tascam->active_urbs); /* Decrement on failed resubmission */ - } -out: - usb_put_urb(urb); -} - diff --git a/us144mkii_controls.c b/us144mkii_controls.c deleted file mode 100644 index 5d69441..0000000 --- a/us144mkii_controls.c +++ /dev/null @@ -1,444 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -// Copyright (c) 2025 Šerif Rami - -#include "us144mkii.h" - -/** - * @brief Text descriptions for playback output source options. - * - * Used by ALSA kcontrol elements to provide user-friendly names for - * the playback routing options (e.g., "Playback 1-2", "Playback 3-4"). - */ -static const char *const playback_source_texts[] = { "Playback 1-2", - "Playback 3-4" }; - -/** - * @brief Text descriptions for capture input source options. - * - * Used by ALSA kcontrol elements to provide user-friendly names for - * the capture routing options (e.g., "Analog In", "Digital In"). - */ -static const char *const capture_source_texts[] = { "Analog In", "Digital In" }; - -/** - * tascam_playback_source_info() - ALSA control info callback for playback - * source. - * @kcontrol: The ALSA kcontrol instance. - * @uinfo: The ALSA control element info structure to fill. - * - * This function provides information about the enumerated playback source - * control, including its type, count, and available items (Playback 1-2, - * Playback 3-4). - * - * Return: 0 on success. - */ -static int tascam_playback_source_info(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_info *uinfo) -{ - return snd_ctl_enum_info(uinfo, 1, 2, playback_source_texts); -} - -/** - * tascam_line_out_get() - ALSA control get callback for Line Outputs Source. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure to fill. - * - * This function retrieves the current selection for the Line Outputs source - * (Playback 1-2 or Playback 3-4) from the driver's private data and populates - * the ALSA control element value. - * - * Return: 0 on success. - */ -static int tascam_line_out_get(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = snd_kcontrol_chip(kcontrol); - - scoped_guard(spinlock_irqsave, &tascam->lock) { - ucontrol->value.enumerated.item[0] = tascam->line_out_source; - } - return 0; -} - -/** - * tascam_line_out_put() - ALSA control put callback for Line Outputs Source. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure containing the new value. - * - * This function sets the Line Outputs source (Playback 1-2 or Playback 3-4) - * based on the user's selection from the ALSA control element. It validates - * the input and updates the driver's private data. - * - * Return: 1 if the value was changed, 0 if unchanged, or a negative error code. - */ -static int tascam_line_out_put(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = snd_kcontrol_chip(kcontrol); - int changed = 0; - - if (ucontrol->value.enumerated.item[0] > 1) - return -EINVAL; - - scoped_guard(spinlock_irqsave, &tascam->lock) { - if (tascam->line_out_source != ucontrol->value.enumerated.item[0]) { - tascam->line_out_source = ucontrol->value.enumerated.item[0]; - changed = 1; - } - } - return changed; -} - -/** - * tascam_line_out_control - ALSA kcontrol definition for Line Outputs Source. - * - * This defines a new ALSA mixer control named "Line OUTPUTS Source" that allows - * the user to select between "Playback 1-2" and "Playback 3-4" for the analog - * line outputs of the device. It uses the `tascam_playback_source_info` for - * information and `tascam_line_out_get`/`tascam_line_out_put` for value - * handling. - */ -static const struct snd_kcontrol_new tascam_line_out_control = { - .iface = SNDRV_CTL_ELEM_IFACE_MIXER, - .name = "Line Playback Source", - .info = tascam_playback_source_info, - .get = tascam_line_out_get, - .put = tascam_line_out_put, -}; - -/** - * tascam_digital_out_get() - ALSA control get callback for Digital Outputs - * Source. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure to fill. - * - * This function retrieves the current selection for the Digital Outputs source - * (Playback 1-2 or Playback 3-4) from the driver's private data and populates - * the ALSA control element value. - * - * Return: 0 on success. - */ -static int tascam_digital_out_get(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = snd_kcontrol_chip(kcontrol); - - scoped_guard(spinlock_irqsave, &tascam->lock) { - ucontrol->value.enumerated.item[0] = tascam->digital_out_source; - } - return 0; -} - -/** - * tascam_digital_out_put() - ALSA control put callback for Digital Outputs - * Source. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure containing the new value. - * - * This function sets the Digital Outputs source (Playback 1-2 or Playback 3-4) - * based on the user's selection from the ALSA control element. It validates - * the input and updates the driver's private data. - * - * Return: 1 if the value was changed, 0 if unchanged, or a negative error code. - */ -static int tascam_digital_out_put(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = snd_kcontrol_chip(kcontrol); - int changed = 0; - - if (ucontrol->value.enumerated.item[0] > 1) - return -EINVAL; - - scoped_guard(spinlock_irqsave, &tascam->lock) { - if (tascam->digital_out_source != ucontrol->value.enumerated.item[0]) { - tascam->digital_out_source = ucontrol->value.enumerated.item[0]; - changed = 1; - } - } - return changed; -} - -/** - * tascam_digital_out_control - ALSA kcontrol definition for Digital Outputs - * Source. - * - * This defines a new ALSA mixer control named "Digital OUTPUTS Source" that - * allows the user to select between "Playback 1-2" and "Playback 3-4" for the - * digital outputs of the device. It uses the `tascam_playback_source_info` for - * information and `tascam_digital_out_get`/`tascam_digital_out_put` for value - * handling. - */ -static const struct snd_kcontrol_new tascam_digital_out_control = { - .iface = SNDRV_CTL_ELEM_IFACE_MIXER, - .name = "Digital Playback Source", - .info = tascam_playback_source_info, - .get = tascam_digital_out_get, - .put = tascam_digital_out_put, -}; - -/** - * tascam_capture_source_info() - ALSA control info callback for capture source. - * @kcontrol: The ALSA kcontrol instance. - * @uinfo: The ALSA control element info structure to fill. - * - * This function provides information about the enumerated capture source - * control, including its type, count, and available items (Analog In, Digital - * In). - * - * Return: 0 on success. - */ -static int tascam_capture_source_info(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_info *uinfo) -{ - return snd_ctl_enum_info(uinfo, 1, 2, capture_source_texts); -} - -/** - * tascam_capture_12_get() - ALSA control get callback for Capture channels 1 - * and 2 Source. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure to fill. - * - * This function retrieves the current selection for the Capture channels 1 and - * 2 source (Analog In or Digital In) from the driver's private data and - * populates the ALSA control element value. - * - * Return: 0 on success. - */ -static int tascam_capture_12_get(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = snd_kcontrol_chip(kcontrol); - - scoped_guard(spinlock_irqsave, &tascam->lock) { - ucontrol->value.enumerated.item[0] = tascam->capture_12_source; - } - return 0; -} - -/** - * tascam_capture_12_put() - ALSA control put callback for Capture channels 1 - * and 2 Source. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure containing the new value. - * - * This function sets the Capture channels 1 and 2 source (Analog In or Digital - * In) based on the user's selection from the ALSA control element. It validates - * the input and updates the driver's private data. - * - * Return: 1 if the value was changed, 0 if unchanged, or a negative error code. - */ -static int tascam_capture_12_put(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = snd_kcontrol_chip(kcontrol); - int changed = 0; - - if (ucontrol->value.enumerated.item[0] > 1) - return -EINVAL; - - scoped_guard(spinlock_irqsave, &tascam->lock) { - if (tascam->capture_12_source != ucontrol->value.enumerated.item[0]) { - tascam->capture_12_source = ucontrol->value.enumerated.item[0]; - changed = 1; - } - } - return changed; -} - -/** - * tascam_capture_12_control - ALSA kcontrol definition for Capture channels 1 - * and 2 Source. - * - * This defines a new ALSA mixer control named "ch1 and ch2 Source" that allows - * the user to select between "Analog In" and "Digital In" for the first two - * capture channels of the device. It uses the `tascam_capture_source_info` for - * information and `tascam_capture_12_get`/`tascam_capture_12_put` for value - * handling. - */ -static const struct snd_kcontrol_new tascam_capture_12_control = { - .iface = SNDRV_CTL_ELEM_IFACE_MIXER, - .name = "Ch1/2 Capture Source", - .info = tascam_capture_source_info, - .get = tascam_capture_12_get, - .put = tascam_capture_12_put, -}; - -/** - * tascam_capture_34_get() - ALSA control get callback for Capture channels 3 - * and 4 Source. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure to fill. - * - * This function retrieves the current selection for the Capture channels 3 and - * 4 source (Analog In or Digital In) from the driver's private data and - * populates the ALSA control element value. - * - * Return: 0 on success. - */ -static int tascam_capture_34_get(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = snd_kcontrol_chip(kcontrol); - - scoped_guard(spinlock_irqsave, &tascam->lock) { - ucontrol->value.enumerated.item[0] = tascam->capture_34_source; - } - return 0; -} - -/** - * tascam_capture_34_put() - ALSA control put callback for Capture channels 3 - * and 4 Source. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure containing the new value. - * - * This function sets the Capture channels 3 and 4 source (Analog In or Digital - * In) based on the user's selection from the ALSA control element. It validates - * the input and updates the driver's private data. - * - * Return: 1 if the value was changed, 0 if unchanged, or a negative error code. - */ -static int tascam_capture_34_put(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = snd_kcontrol_chip(kcontrol); - int changed = 0; - - if (ucontrol->value.enumerated.item[0] > 1) - return -EINVAL; - - scoped_guard(spinlock_irqsave, &tascam->lock) { - if (tascam->capture_34_source != ucontrol->value.enumerated.item[0]) { - tascam->capture_34_source = ucontrol->value.enumerated.item[0]; - changed = 1; - } - } - return changed; -} - -/** - * tascam_capture_34_control - ALSA kcontrol definition for Capture channels 3 - * and 4 Source. - * - * This defines a new ALSA mixer control named "ch3 and ch4 Source" that allows - * the user to select between "Analog In" and "Digital In" for the third and - * fourth capture channels of the device. It uses the - * `tascam_capture_source_info` for information and - * `tascam_capture_34_get`/`tascam_capture_34_put` for value handling. - */ -static const struct snd_kcontrol_new tascam_capture_34_control = { - .iface = SNDRV_CTL_ELEM_IFACE_MIXER, - .name = "Ch3/4 Capture Source", - .info = tascam_capture_source_info, - .get = tascam_capture_34_get, - .put = tascam_capture_34_put, -}; - -/** - * tascam_samplerate_info() - ALSA control info callback for Sample Rate. - * @kcontrol: The ALSA kcontrol instance. - * @uinfo: The ALSA control element info structure to fill. - * - * This function provides information about the Sample Rate control, defining - * it as an integer type with a minimum value of 0 and a maximum of 96000. - * - * Return: 0 on success. - */ -static int tascam_samplerate_info(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_info *uinfo) -{ - uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; - uinfo->count = 1; - uinfo->value.integer.min = 0; - uinfo->value.integer.max = 96000; - return 0; -} - -/** - * tascam_samplerate_get() - ALSA control get callback for Sample Rate. - * @kcontrol: The ALSA kcontrol instance. - * @ucontrol: The ALSA control element value structure to fill. - * - * This function retrieves the current sample rate from the device via a USB - * control message and populates the ALSA control element value. If the rate - * is already known (i.e., `current_rate` is set), it returns that value - * directly. - * - * Return: 0 on success, or a negative error code on failure. - */ -static int tascam_samplerate_get(struct snd_kcontrol *kcontrol, - struct snd_ctl_elem_value *ucontrol) -{ - struct tascam_card *tascam = - (struct tascam_card *)snd_kcontrol_chip(kcontrol); - u8 *buf __free(kfree) = NULL; - int err; - u32 rate = 0; - - scoped_guard(spinlock_irqsave, &tascam->lock) { - if (tascam->current_rate > 0) { - ucontrol->value.integer.value[0] = tascam->current_rate; - return 0; - } - } - - buf = kmalloc(3, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - err = usb_control_msg(tascam->dev, usb_rcvctrlpipe(tascam->dev, 0), - UAC_GET_CUR, RT_D2H_CLASS_EP, - UAC_SAMPLING_FREQ_CONTROL, EP_AUDIO_IN, buf, 3, - USB_CTRL_TIMEOUT_MS); - - if (err >= 3) - rate = buf[0] | (buf[1] << 8) | (buf[2] << 16); - - ucontrol->value.integer.value[0] = rate; - return 0; -} - -/** - * tascam_samplerate_control - ALSA kcontrol definition for Sample Rate. - * - * This defines a new ALSA mixer control named "Sample Rate" that displays - * the current sample rate of the device. It is a read-only control. - */ -static const struct snd_kcontrol_new tascam_samplerate_control = { - .iface = SNDRV_CTL_ELEM_IFACE_MIXER, - .name = "Sample Rate", - .info = tascam_samplerate_info, - .get = tascam_samplerate_get, - .access = SNDRV_CTL_ELEM_ACCESS_READ, -}; - -int tascam_create_controls(struct tascam_card *tascam) -{ - int err; - - err = snd_ctl_add(tascam->card, - snd_ctl_new1(&tascam_line_out_control, tascam)); - if (err < 0) - return err; - err = snd_ctl_add(tascam->card, - snd_ctl_new1(&tascam_digital_out_control, tascam)); - if (err < 0) - return err; - err = snd_ctl_add(tascam->card, - snd_ctl_new1(&tascam_capture_12_control, tascam)); - if (err < 0) - return err; - err = snd_ctl_add(tascam->card, - snd_ctl_new1(&tascam_capture_34_control, tascam)); - if (err < 0) - return err; - - err = snd_ctl_add(tascam->card, - snd_ctl_new1(&tascam_samplerate_control, tascam)); - if (err < 0) - return err; - - return 0; -} diff --git a/us144mkii_midi.c b/us144mkii_midi.c index ed2afec..a732a34 100644 --- a/us144mkii_midi.c +++ b/us144mkii_midi.c @@ -3,401 +3,247 @@ #include "us144mkii.h" -/** - * tascam_midi_in_work_handler() - Deferred work for processing MIDI input. - * @work: The work_struct instance. - * - * This function runs in a thread context. It safely reads raw USB data from - * the kfifo, processes it by stripping protocol-specific padding bytes, and - * passes the clean MIDI data to the ALSA rawmidi subsystem. - */ -static void tascam_midi_in_work_handler(struct work_struct *work) -{ - struct tascam_card *tascam = - container_of(work, struct tascam_card, midi_in_work); - u8 buf[9]; - u8 clean_buf[8]; - unsigned int count, clean_count; - - if (!tascam->midi_in_substream) - return; - - while (kfifo_out_spinlocked(&tascam->midi_in_fifo, buf, sizeof(buf), - &tascam->midi_in_lock) == sizeof(buf)) { - clean_count = 0; - for (count = 0; count < 8; ++count) { - if (buf[count] != 0xfd) - clean_buf[clean_count++] = buf[count]; - } - - if (clean_count > 0) - snd_rawmidi_receive(tascam->midi_in_substream, - clean_buf, clean_count); - } -} - -void tascam_midi_in_urb_complete(struct urb *urb) +static void tascam_midi_out_complete(struct urb *urb) { struct tascam_card *tascam = urb->context; - int ret; + unsigned long flags; + int count; + bool submit = false; + bool active; - if (!tascam) - goto out; + spin_lock_irqsave(&tascam->midi_lock, flags); - if (urb->status) { - if (urb->status != -ENOENT && urb->status != -ECONNRESET && - urb->status != -ESHUTDOWN && urb->status != -EPROTO) { - dev_err_ratelimited(tascam->card->dev, - "MIDI IN URB failed: status %d\n", - urb->status); + if (urb->status || !tascam->midi_output) { + tascam->midi_out_active = false; + spin_unlock_irqrestore(&tascam->midi_lock, flags); + return; + } + + active = tascam->midi_out_active; + spin_unlock_irqrestore(&tascam->midi_lock, flags); + + if (!active) + return; + + count = snd_rawmidi_transmit(tascam->midi_output, tascam->midi_out_buf, MIDI_PAYLOAD_SIZE); + if (count > 0) { + if (count < MIDI_PAYLOAD_SIZE) + memset(tascam->midi_out_buf + count, 0xFD, MIDI_PAYLOAD_SIZE - count); + + tascam->midi_out_buf[8] = 0xE0; + urb->transfer_buffer_length = MIDI_PACKET_SIZE; + submit = true; + } else { + spin_lock_irqsave(&tascam->midi_lock, flags); + tascam->midi_out_active = false; + spin_unlock_irqrestore(&tascam->midi_lock, flags); + } + + if (submit) { + if (usb_submit_urb(urb, GFP_ATOMIC) < 0) { + spin_lock_irqsave(&tascam->midi_lock, flags); + tascam->midi_out_active = false; + spin_unlock_irqrestore(&tascam->midi_lock, flags); } - goto out; } - - if (atomic_read(&tascam->midi_in_active) && - urb->actual_length > 0) { - kfifo_in_spinlocked(&tascam->midi_in_fifo, urb->transfer_buffer, - urb->actual_length, &tascam->midi_in_lock); - schedule_work(&tascam->midi_in_work); - } - - usb_get_urb(urb); - usb_anchor_urb(urb, &tascam->midi_in_anchor); - ret = usb_submit_urb(urb, GFP_ATOMIC); - if (ret < 0) { - dev_err(tascam->card->dev, - "Failed to resubmit MIDI IN URB: error %d\n", ret); - usb_unanchor_urb(urb); - goto out; - } - -out: - usb_put_urb(urb); } -/** - * tascam_midi_in_open() - Opens the MIDI input substream. - * @substream: The ALSA rawmidi substream to open. - * - * This function stores a reference to the MIDI input substream in the - * driver's private data. - * - * Return: 0 on success. - */ -static int tascam_midi_in_open(struct snd_rawmidi_substream *substream) +static void tascam_midi_output_trigger(struct snd_rawmidi_substream *substream, int up) { struct tascam_card *tascam = substream->rmidi->private_data; - - tascam->midi_in_substream = substream; - return 0; -} - -/** - * tascam_midi_in_close() - Closes the MIDI input substream. - * @substream: The ALSA rawmidi substream to close. - * - * Return: 0 on success. - */ -static int tascam_midi_in_close(struct snd_rawmidi_substream *substream) -{ - return 0; -} - -/** - * tascam_midi_in_trigger() - Triggers MIDI input stream activity. - * @substream: The ALSA rawmidi substream. - * @up: Boolean indicating whether to start (1) or stop (0) the stream. - * - * This function starts or stops the MIDI input URBs based on the 'up' - * parameter. When starting, it resets the kfifo and submits all MIDI input - * URBs. When stopping, it kills all anchored MIDI input URBs and cancels the - * associated workqueue. - */ -static void tascam_midi_in_trigger(struct snd_rawmidi_substream *substream, - int up) -{ - struct tascam_card *tascam = substream->rmidi->private_data; - int i, err; + unsigned long flags; + int count; + bool do_submit = false; if (up) { - if (atomic_xchg(&tascam->midi_in_active, 1) == 0) { - scoped_guard(spinlock_irqsave, &tascam->midi_in_lock) - { - kfifo_reset(&tascam->midi_in_fifo); - } + spin_lock_irqsave(&tascam->midi_lock, flags); + tascam->midi_output = substream; + if (!tascam->midi_out_active) { + tascam->midi_out_active = true; + do_submit = true; + } + spin_unlock_irqrestore(&tascam->midi_lock, flags); - for (i = 0; i < NUM_MIDI_IN_URBS; i++) { - usb_get_urb(tascam->midi_in_urbs[i]); - usb_anchor_urb(tascam->midi_in_urbs[i], - &tascam->midi_in_anchor); - err = usb_submit_urb(tascam->midi_in_urbs[i], - GFP_KERNEL); - if (err < 0) { - dev_err(tascam->card->dev, - "Failed to submit MIDI IN URB %d: %d\n", - i, err); - usb_unanchor_urb( - tascam->midi_in_urbs[i]); - usb_put_urb(tascam->midi_in_urbs[i]); + if (do_submit) { + count = snd_rawmidi_transmit(substream, tascam->midi_out_buf, MIDI_PAYLOAD_SIZE); + if (count > 0) { + if (count < MIDI_PAYLOAD_SIZE) + memset(tascam->midi_out_buf + count, 0xFD, MIDI_PAYLOAD_SIZE - count); + + tascam->midi_out_buf[8] = 0xE0; + tascam->midi_out_urb->transfer_buffer_length = MIDI_PACKET_SIZE; + + usb_anchor_urb(tascam->midi_out_urb, &tascam->midi_anchor); + if (usb_submit_urb(tascam->midi_out_urb, GFP_ATOMIC) < 0) { + usb_unanchor_urb(tascam->midi_out_urb); + spin_lock_irqsave(&tascam->midi_lock, flags); + tascam->midi_out_active = false; + spin_unlock_irqrestore(&tascam->midi_lock, flags); } + } else { + spin_lock_irqsave(&tascam->midi_lock, flags); + tascam->midi_out_active = false; + spin_unlock_irqrestore(&tascam->midi_lock, flags); } } } else { - if (atomic_xchg(&tascam->midi_in_active, 0) == 1) { - usb_kill_anchored_urbs(&tascam->midi_in_anchor); - cancel_work_sync(&tascam->midi_in_work); - } + spin_lock_irqsave(&tascam->midi_lock, flags); + tascam->midi_output = NULL; + spin_unlock_irqrestore(&tascam->midi_lock, flags); } } -/** - * tascam_midi_in_ops - ALSA rawmidi operations for MIDI input. - * - * This structure defines the callback functions for MIDI input stream - * operations, including open, close, and trigger. - */ -static const struct snd_rawmidi_ops tascam_midi_in_ops = { - .open = tascam_midi_in_open, - .close = tascam_midi_in_close, - .trigger = tascam_midi_in_trigger, -}; - -void tascam_midi_out_urb_complete(struct urb *urb) +static void tascam_midi_in_complete(struct urb *urb) { struct tascam_card *tascam = urb->context; - int i, urb_index = -1; - - if (urb->status) { - if (urb->status != -ENOENT && urb->status != -ECONNRESET && - urb->status != -ESHUTDOWN) { - dev_err_ratelimited(tascam->card->dev, - "MIDI OUT URB failed: %d\n", - urb->status); - } - goto out; - } - - if (!tascam) - goto out; - - for (i = 0; i < NUM_MIDI_OUT_URBS; i++) { - if (tascam->midi_out_urbs[i] == urb) { - urb_index = i; - break; - } - } - - if (urb_index < 0) { - dev_err_ratelimited(tascam->card->dev, - "Unknown MIDI OUT URB completed!\n"); - goto out; - } - - scoped_guard(spinlock_irqsave, &tascam->midi_out_lock) - { - clear_bit(urb_index, &tascam->midi_out_urbs_in_flight); - } - - if (atomic_read(&tascam->midi_out_active)) - schedule_work(&tascam->midi_out_work); - -out: - usb_put_urb(urb); -} - -/** - * tascam_midi_out_work_handler() - Deferred work for sending MIDI data - * @work: The work_struct instance. - * - * This function handles the proprietary output protocol: take the raw MIDI - * message bytes from the application, place them at the start of a 9-byte - * buffer, pad the rest with 0xFD, and add a terminator byte (0x00). - * This function pulls as many bytes as will fit into one packet from the - * ALSA buffer and sends them. - */ -static void tascam_midi_out_work_handler(struct work_struct *work) -{ - struct tascam_card *tascam = - container_of(work, struct tascam_card, midi_out_work); - struct snd_rawmidi_substream *substream = tascam->midi_out_substream; int i; - if (!substream || !atomic_read(&tascam->midi_out_active)) + if (urb->status) return; - while (snd_rawmidi_transmit_peek(substream, (u8[]){ 0 }, 1) == 1) { - int urb_index; - struct urb *urb; - u8 *buf; - int bytes_to_send; + if (urb->actual_length == MIDI_PACKET_SIZE && tascam->midi_input) { + u8 *data = urb->transfer_buffer; - scoped_guard(spinlock_irqsave, &tascam->midi_out_lock) { - urb_index = -1; - for (i = 0; i < NUM_MIDI_OUT_URBS; i++) { - if (!test_bit( - i, - &tascam->midi_out_urbs_in_flight)) { - urb_index = i; - break; - } - } - - if (urb_index < 0) - return; /* No free URBs, will be rescheduled by - * completion handler - */ - - urb = tascam->midi_out_urbs[urb_index]; - buf = urb->transfer_buffer; - bytes_to_send = snd_rawmidi_transmit(substream, buf, 8); - - if (bytes_to_send <= 0) - break; /* No more data */ - - if (bytes_to_send < 9) - memset(buf + bytes_to_send, 0xfd, - 9 - bytes_to_send); - buf[8] = 0xe0; - - set_bit(urb_index, &tascam->midi_out_urbs_in_flight); - urb->transfer_buffer_length = 9; - } - - usb_get_urb(urb); - usb_anchor_urb(urb, &tascam->midi_out_anchor); - if (usb_submit_urb(urb, GFP_KERNEL) < 0) { - dev_err_ratelimited( - tascam->card->dev, - "Failed to submit MIDI OUT URB %d\n", - urb_index); - scoped_guard(spinlock_irqsave, &tascam->midi_out_lock) - { - clear_bit(urb_index, - &tascam->midi_out_urbs_in_flight); - } - usb_unanchor_urb(urb); - usb_put_urb(urb); - break; /* Stop on error */ - } - } -} - -/** - * tascam_midi_out_open() - Opens the MIDI output substream. - * @substream: The ALSA rawmidi substream to open. - * - * This function stores a reference to the MIDI output substream in the - * driver's private data and initializes the MIDI running status. - * - * Return: 0 on success. - */ -static int tascam_midi_out_open(struct snd_rawmidi_substream *substream) -{ - struct tascam_card *tascam = substream->rmidi->private_data; - - tascam->midi_out_substream = substream; - /* Initialize the running status state for the packet packer. */ - tascam->midi_running_status = 0; - return 0; -} - -/** - * tascam_midi_out_close() - Closes the MIDI output substream. - * @substream: The ALSA rawmidi substream to close. - * - * Return: 0 on success. - */ -static int tascam_midi_out_close(struct snd_rawmidi_substream *substream) -{ - return 0; -} - -/** - * tascam_midi_out_drain() - Drains the MIDI output stream. - * @substream: The ALSA rawmidi substream. - * - * This function cancels any pending MIDI output work and kills all - * anchored MIDI output URBs, ensuring all data is sent or discarded. - */ -static void tascam_midi_out_drain(struct snd_rawmidi_substream *substream) -{ - struct tascam_card *tascam = substream->rmidi->private_data; - bool in_flight = true; - - while (in_flight) { - in_flight = false; - for (int i = 0; i < NUM_MIDI_OUT_URBS; i++) { - if (test_bit(i, &tascam->midi_out_urbs_in_flight)) { - in_flight = true; + for (i = 0; i < MIDI_PAYLOAD_SIZE; i++) { + if (data[i] == 0xFD) break; - } + snd_rawmidi_receive(tascam->midi_input, &data[i], 1); } - if (in_flight) - schedule_timeout_uninterruptible(1); } - cancel_work_sync(&tascam->midi_out_work); - usb_kill_anchored_urbs(&tascam->midi_out_anchor); + if (usb_submit_urb(urb, GFP_ATOMIC) < 0) + usb_unanchor_urb(urb); } -/** - * tascam_midi_out_trigger() - Triggers MIDI output stream activity. - * @substream: The ALSA rawmidi substream. - * @up: Boolean indicating whether to start (1) or stop (0) the stream. - * - * This function starts or stops the MIDI output workqueue based on the - * 'up' parameter. - */ -static void tascam_midi_out_trigger(struct snd_rawmidi_substream *substream, - int up) +static void tascam_midi_input_trigger(struct snd_rawmidi_substream *substream, int up) { struct tascam_card *tascam = substream->rmidi->private_data; - if (up) { - atomic_set(&tascam->midi_out_active, 1); - schedule_work(&tascam->midi_out_work); - } else { - atomic_set(&tascam->midi_out_active, 0); - } + if (up) + tascam->midi_input = substream; + else + tascam->midi_input = NULL; } -/** - * tascam_midi_out_ops - ALSA rawmidi operations for MIDI output. - * - * This structure defines the callback functions for MIDI output stream - * operations, including open, close, trigger, and drain. - */ -static const struct snd_rawmidi_ops tascam_midi_out_ops = { - .open = tascam_midi_out_open, - .close = tascam_midi_out_close, - .trigger = tascam_midi_out_trigger, - .drain = tascam_midi_out_drain, +static int tascam_midi_open(struct snd_rawmidi_substream *substream) +{ + struct tascam_card *tascam = substream->rmidi->private_data; + + if (substream->stream == SNDRV_RAWMIDI_STREAM_OUTPUT) { + unsigned long flags; + + spin_lock_irqsave(&tascam->midi_lock, flags); + tascam->midi_out_active = false; + spin_unlock_irqrestore(&tascam->midi_lock, flags); + } else if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) { + usb_anchor_urb(tascam->midi_in_urb, &tascam->midi_anchor); + if (usb_submit_urb(tascam->midi_in_urb, GFP_KERNEL) < 0) { + usb_unanchor_urb(tascam->midi_in_urb); + return -EIO; + } + } + return 0; +} + +static int tascam_midi_close(struct snd_rawmidi_substream *substream) +{ + struct tascam_card *tascam = substream->rmidi->private_data; + + if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) + usb_kill_urb(tascam->midi_in_urb); + return 0; +} + +static const struct snd_rawmidi_ops midi_output_ops = { + .open = tascam_midi_open, + .close = tascam_midi_close, + .trigger = tascam_midi_output_trigger, }; +static const struct snd_rawmidi_ops midi_input_ops = { + .open = tascam_midi_open, + .close = tascam_midi_close, + .trigger = tascam_midi_input_trigger, +}; + +/** + * tascam_create_midi - create and initialize the MIDI device + * @tascam: the tascam_card instance + * + * Return: 0 on success, or a negative error code on failure. + */ int tascam_create_midi(struct tascam_card *tascam) { int err; + struct snd_rawmidi *rmidi; - err = snd_rawmidi_new(tascam->card, "US144MKII MIDI", 0, 1, 1, - &tascam->rmidi); + err = snd_rawmidi_new(tascam->card, "TASCAM MIDI", 0, 1, 1, &rmidi); if (err < 0) return err; - strscpy(tascam->rmidi->name, "US144MKII MIDI", - sizeof(tascam->rmidi->name)); - tascam->rmidi->private_data = tascam; + rmidi->private_data = tascam; + strscpy(rmidi->name, "TASCAM US-144MKII MIDI", sizeof(rmidi->name)); - snd_rawmidi_set_ops(tascam->rmidi, SNDRV_RAWMIDI_STREAM_INPUT, - &tascam_midi_in_ops); - snd_rawmidi_set_ops(tascam->rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, - &tascam_midi_out_ops); + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &midi_output_ops); + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &midi_input_ops); - tascam->rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT | - SNDRV_RAWMIDI_INFO_OUTPUT | - SNDRV_RAWMIDI_INFO_DUPLEX; + rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | + SNDRV_RAWMIDI_INFO_INPUT | + SNDRV_RAWMIDI_INFO_DUPLEX; + tascam->rmidi = rmidi; - INIT_WORK(&tascam->midi_in_work, tascam_midi_in_work_handler); - INIT_WORK(&tascam->midi_out_work, tascam_midi_out_work_handler); + tascam->midi_out_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!tascam->midi_out_urb) { + err = -ENOMEM; + goto err_out_urb; + } + + tascam->midi_in_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!tascam->midi_in_urb) { + err = -ENOMEM; + goto err_in_urb; + } + + tascam->midi_out_buf = usb_alloc_coherent(tascam->dev, MIDI_PACKET_SIZE, + GFP_KERNEL, &tascam->midi_out_urb->transfer_dma); + if (!tascam->midi_out_buf) { + err = -ENOMEM; + goto err_out_buf; + } + + tascam->midi_in_buf = usb_alloc_coherent(tascam->dev, MIDI_PACKET_SIZE, + GFP_KERNEL, &tascam->midi_in_urb->transfer_dma); + if (!tascam->midi_in_buf) { + err = -ENOMEM; + goto err_in_buf; + } + + usb_fill_bulk_urb(tascam->midi_out_urb, tascam->dev, + usb_sndbulkpipe(tascam->dev, EP_MIDI_OUT), + tascam->midi_out_buf, MIDI_PACKET_SIZE, + tascam_midi_out_complete, tascam); + tascam->midi_out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + usb_fill_bulk_urb(tascam->midi_in_urb, tascam->dev, + usb_rcvbulkpipe(tascam->dev, EP_MIDI_IN), + tascam->midi_in_buf, MIDI_PACKET_SIZE, + tascam_midi_in_complete, tascam); + tascam->midi_in_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; + + spin_lock_init(&tascam->midi_lock); + init_usb_anchor(&tascam->midi_anchor); return 0; + +err_in_buf: + usb_free_coherent(tascam->dev, MIDI_PACKET_SIZE, + tascam->midi_out_buf, tascam->midi_out_urb->transfer_dma); +err_out_buf: + usb_free_urb(tascam->midi_in_urb); + tascam->midi_in_urb = NULL; +err_in_urb: + usb_free_urb(tascam->midi_out_urb); + tascam->midi_out_urb = NULL; +err_out_urb: + return err; } diff --git a/us144mkii_pcm.c b/us144mkii_pcm.c index 0c84304..acc432f 100644 --- a/us144mkii_pcm.c +++ b/us144mkii_pcm.c @@ -1,124 +1,40 @@ // SPDX-License-Identifier: GPL-2.0-only // Copyright (c) 2025 Šerif Rami -#include "us144mkii.h" +#include "us144mkii_pcm.h" + +static int tascam_write_regs(struct tascam_card *tascam, const u16 *regs, size_t count) +{ + int i, err = 0; + struct usb_device *dev = tascam->dev; + + for (i = 0; i < count; i++) { + err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, + regs[i], REG_VAL_ENABLE, NULL, 0, USB_CTRL_TIMEOUT_MS); + if (err < 0) + return err; + } + return 0; +} /** - * fpo_init_pattern() - Generates a packet distribution pattern. - * @size: The number of elements in the pattern array (e.g., 8). - * @pattern_array: Pointer to the array to be populated. - * @initial_value: The base value to initialize each element with. - * @target_sum: The desired sum of all elements in the final array. + * us144mkii_configure_device_for_rate() - set sample rate via USB control msgs + * @tascam: the tascam_card instance + * @rate: the target sample rate (e.g., 44100, 96000) * - * This function initializes an array with a base value and then iteratively - * adjusts the elements to match a target sum, distributing the difference - * as evenly as possible. + * This function sends a sequence of vendor-specific and UAC control messages + * to configure the device hardware for the specified sample rate. + * + * Return: 0 on success, or a negative error code on failure. */ -static void fpo_init_pattern(unsigned int size, unsigned int *pattern_array, - unsigned int initial_value, int target_sum) -{ - int diff, i; - - if (!size) - return; - - for (i = 0; i < size; ++i) - pattern_array[i] = initial_value; - - diff = target_sum - (size * initial_value); - for (i = 0; i < abs(diff); ++i) { - if (diff > 0) - pattern_array[i]++; - else - pattern_array[i]--; - } -} - -const struct snd_pcm_hardware tascam_pcm_hw = { - .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | - SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), - .formats = SNDRV_PCM_FMTBIT_S24_3LE, - .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | - SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000), - .rate_min = 44100, - .rate_max = 96000, - .channels_min = NUM_CHANNELS, - .channels_max = NUM_CHANNELS, - .buffer_bytes_max = 1024 * 1024, - .period_bytes_min = 48 * BYTES_PER_FRAME, - .period_bytes_max = 1024 * BYTES_PER_FRAME, - .periods_min = 2, - .periods_max = 1024, -}; - -void process_playback_routing_us144mkii(struct tascam_card *tascam, - const u8 *src_buffer, u8 *dst_buffer, - size_t frames) -{ - size_t f; - const u8 *src_12, *src_34; - u8 *dst_line, *dst_digital; - - for (f = 0; f < frames; ++f) { - src_12 = src_buffer + f * BYTES_PER_FRAME; - src_34 = src_12 + (2 * BYTES_PER_SAMPLE); - dst_line = dst_buffer + f * BYTES_PER_FRAME; - dst_digital = dst_line + (2 * BYTES_PER_SAMPLE); - - /* LINE OUTPUTS (ch1/2 on device) */ - if (tascam->line_out_source == 0) /* "ch1 and ch2" */ - memcpy(dst_line, src_12, 2 * BYTES_PER_SAMPLE); - else /* "ch3 and ch4" */ - memcpy(dst_line, src_34, 2 * BYTES_PER_SAMPLE); - - /* DIGITAL OUTPUTS (ch3/4 on device) */ - if (tascam->digital_out_source == 0) /* "ch1 and ch2" */ - memcpy(dst_digital, src_12, 2 * BYTES_PER_SAMPLE); - else /* "ch3 and ch4" */ - memcpy(dst_digital, src_34, 2 * BYTES_PER_SAMPLE); - } -} - -void process_capture_routing_us144mkii(struct tascam_card *tascam, - const s32 *decoded_block, - s32 *routed_block) -{ - int f; - const s32 *src_frame; - s32 *dst_frame; - - for (f = 0; f < FRAMES_PER_DECODE_BLOCK; f++) { - src_frame = decoded_block + (f * DECODED_CHANNELS_PER_FRAME); - dst_frame = routed_block + (f * DECODED_CHANNELS_PER_FRAME); - - /* ch1 and ch2 Source */ - if (tascam->capture_12_source == 0) { /* analog inputs */ - dst_frame[0] = src_frame[0]; /* Analog L */ - dst_frame[1] = src_frame[1]; /* Analog R */ - } else { /* digital inputs */ - dst_frame[0] = src_frame[2]; /* Digital L */ - dst_frame[1] = src_frame[3]; /* Digital R */ - } - - /* ch3 and ch4 Source */ - if (tascam->capture_34_source == 0) { /* analog inputs */ - dst_frame[2] = src_frame[0]; /* Analog L (Duplicate) */ - dst_frame[3] = src_frame[1]; /* Analog R (Duplicate) */ - } else { /* digital inputs */ - dst_frame[2] = src_frame[2]; /* Digital L */ - dst_frame[3] = src_frame[3]; /* Digital R */ - } - } -} - int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate) { struct usb_device *dev = tascam->dev; - u8 *rate_payload_buf __free(kfree) = NULL; - u16 rate_vendor_wValue; + u8 *rate_payload_buf; int err = 0; const u8 *current_payload_src; + u16 rate_reg; static const u8 payload_44100[] = { 0x44, 0xac, 0x00 }; static const u8 payload_48000[] = { 0x80, 0xbb, 0x00 }; @@ -128,23 +44,21 @@ int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate) switch (rate) { case 44100: current_payload_src = payload_44100; - rate_vendor_wValue = REG_ADDR_RATE_44100; + rate_reg = REG_ADDR_RATE_44100; break; case 48000: current_payload_src = payload_48000; - rate_vendor_wValue = REG_ADDR_RATE_48000; + rate_reg = REG_ADDR_RATE_48000; break; case 88200: current_payload_src = payload_88200; - rate_vendor_wValue = REG_ADDR_RATE_88200; + rate_reg = REG_ADDR_RATE_88200; break; case 96000: current_payload_src = payload_96000; - rate_vendor_wValue = REG_ADDR_RATE_96000; + rate_reg = REG_ADDR_RATE_96000; break; default: - dev_err(&dev->dev, - "Unsupported sample rate %d for configuration\n", rate); return -EINVAL; } @@ -152,97 +66,69 @@ int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate) if (!rate_payload_buf) return -ENOMEM; - dev_info(&dev->dev, "Configuring device for %d Hz\n", rate); + err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + VENDOR_REQ_MODE_CONTROL, RT_H2D_VENDOR_DEV, + MODE_VAL_CONFIG, 0x0000, NULL, 0, USB_CTRL_TIMEOUT_MS); + if (err < 0) + goto fail; + + usb_control_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, + RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL, + EP_AUDIO_IN, rate_payload_buf, 3, USB_CTRL_TIMEOUT_MS); + usb_control_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, + RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL, + EP_AUDIO_OUT, rate_payload_buf, 3, USB_CTRL_TIMEOUT_MS); + + { + const u16 regs_to_write[] = { + REG_ADDR_UNKNOWN_0D, REG_ADDR_UNKNOWN_0E, + REG_ADDR_UNKNOWN_0F, rate_reg, REG_ADDR_UNKNOWN_11 + }; + err = tascam_write_regs(tascam, regs_to_write, ARRAY_SIZE(regs_to_write)); + if (err < 0) + goto fail; + } err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - VENDOR_REQ_MODE_CONTROL, RT_H2D_VENDOR_DEV, - MODE_VAL_CONFIG, 0x0000, NULL, 0, - USB_CTRL_TIMEOUT_MS); - if (err < 0) - goto fail; - err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, - RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL, - EP_AUDIO_IN, rate_payload_buf, 3, - USB_CTRL_TIMEOUT_MS); - if (err < 0) - goto fail; - err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, - RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL, - EP_AUDIO_OUT, rate_payload_buf, 3, - USB_CTRL_TIMEOUT_MS); - if (err < 0) - goto fail; - err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, - REG_ADDR_UNKNOWN_0D, REG_VAL_ENABLE, NULL, 0, - USB_CTRL_TIMEOUT_MS); - if (err < 0) - goto fail; - err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, - REG_ADDR_UNKNOWN_0E, REG_VAL_ENABLE, NULL, 0, - USB_CTRL_TIMEOUT_MS); - if (err < 0) - goto fail; - err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, - REG_ADDR_UNKNOWN_0F, REG_VAL_ENABLE, NULL, 0, - USB_CTRL_TIMEOUT_MS); - if (err < 0) - goto fail; - err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, - rate_vendor_wValue, REG_VAL_ENABLE, NULL, 0, - USB_CTRL_TIMEOUT_MS); - if (err < 0) - goto fail; - err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, - REG_ADDR_UNKNOWN_11, REG_VAL_ENABLE, NULL, 0, - USB_CTRL_TIMEOUT_MS); - if (err < 0) - goto fail; - err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), - VENDOR_REQ_MODE_CONTROL, RT_H2D_VENDOR_DEV, - MODE_VAL_STREAM_START, 0x0000, NULL, 0, - USB_CTRL_TIMEOUT_MS); + VENDOR_REQ_MODE_CONTROL, RT_H2D_VENDOR_DEV, + MODE_VAL_STREAM_START, 0x0000, NULL, 0, USB_CTRL_TIMEOUT_MS); if (err < 0) goto fail; + + kfree(rate_payload_buf); return 0; - fail: - dev_err(&dev->dev, - "Device configuration failed at rate %d with error %d\n", rate, - err); + kfree(rate_payload_buf); return err; } +/** + * tascam_pcm_hw_params() - configure hardware parameters for PCM streams + * @substream: the ALSA PCM substream + * @params: the hardware parameters to apply + * + * This function allocates pages for the PCM buffer and, for playback streams, + * selects the appropriate feedback patterns based on the requested sample rate. + * It also configures the device hardware for the selected sample rate if it + * has changed. + * + * Return: 0 on success, or a negative error code on failure. + */ int tascam_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params) + struct snd_pcm_hw_params *params) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); - int err; unsigned int rate = params_rate(params); - - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - tascam->fpo.sample_rate_khz = rate / 1000; - tascam->fpo.base_feedback_value = tascam->fpo.sample_rate_khz; - tascam->fpo.feedback_offset = 2; - tascam->fpo.current_index = 0; - tascam->fpo.previous_index = 0; - tascam->fpo.sync_locked = false; - - unsigned int initial_value = tascam->fpo.sample_rate_khz / 8; - - for (int i = 0; i < 5; i++) { - int target_sum = tascam->fpo.sample_rate_khz - - tascam->fpo.feedback_offset + i; - fpo_init_pattern(8, tascam->fpo.full_frame_patterns[i], - initial_value, target_sum); - } - } + int err; if (tascam->current_rate != rate) { + + usb_kill_anchored_urbs(&tascam->playback_anchor); + usb_kill_anchored_urbs(&tascam->feedback_anchor); + usb_kill_anchored_urbs(&tascam->capture_anchor); + + atomic_set(&tascam->active_urbs, 0); + err = us144mkii_configure_device_for_rate(tascam, rate); if (err < 0) { tascam->current_rate = 0; @@ -250,121 +136,17 @@ int tascam_pcm_hw_params(struct snd_pcm_substream *substream, } tascam->current_rate = rate; } - return 0; } -int tascam_pcm_hw_free(struct snd_pcm_substream *substream) +/** + * tascam_stop_pcm_work_handler() - work handler to stop PCM streams + * @work: pointer to the work_struct + */ +void tascam_stop_pcm_work_handler(struct work_struct *work) { - return 0; -} - -int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct tascam_card *tascam = snd_pcm_substream_chip(substream); - int err = 0; - int i; - bool do_start = false; - bool do_stop = false; - - scoped_guard(spinlock_irqsave, &tascam->lock) { - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - case SNDRV_PCM_TRIGGER_RESUME: - if (!atomic_read(&tascam->playback_active)) { - atomic_set(&tascam->playback_active, 1); - atomic_set(&tascam->capture_active, 1); - do_start = true; - } - break; - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - if (atomic_read(&tascam->playback_active)) { - atomic_set(&tascam->playback_active, 0); - atomic_set(&tascam->capture_active, 0); - do_stop = true; - } - break; - default: - err = -EINVAL; - break; - } - } - - if (do_start) { - if (atomic_read(&tascam->active_urbs) > 0) { - dev_warn(tascam->card->dev, - "Cannot start, URBs still active.\n"); - return -EAGAIN; - } - - for (i = 0; i < NUM_FEEDBACK_URBS; i++) { - usb_get_urb(tascam->feedback_urbs[i]); - usb_anchor_urb(tascam->feedback_urbs[i], - &tascam->feedback_anchor); - err = usb_submit_urb(tascam->feedback_urbs[i], - GFP_ATOMIC); - if (err < 0) { - usb_unanchor_urb(tascam->feedback_urbs[i]); - usb_put_urb(tascam->feedback_urbs[i]); - atomic_dec(&tascam->active_urbs); - goto start_rollback; - } - atomic_inc(&tascam->active_urbs); - } - for (i = 0; i < NUM_PLAYBACK_URBS; i++) { - usb_get_urb(tascam->playback_urbs[i]); - usb_anchor_urb(tascam->playback_urbs[i], - &tascam->playback_anchor); - err = usb_submit_urb(tascam->playback_urbs[i], - GFP_ATOMIC); - if (err < 0) { - usb_unanchor_urb(tascam->playback_urbs[i]); - usb_put_urb(tascam->playback_urbs[i]); - atomic_dec(&tascam->active_urbs); - goto start_rollback; - } - atomic_inc(&tascam->active_urbs); - } - for (i = 0; i < NUM_CAPTURE_URBS; i++) { - usb_get_urb(tascam->capture_urbs[i]); - usb_anchor_urb(tascam->capture_urbs[i], - &tascam->capture_anchor); - err = usb_submit_urb(tascam->capture_urbs[i], - GFP_ATOMIC); - if (err < 0) { - usb_unanchor_urb(tascam->capture_urbs[i]); - usb_put_urb(tascam->capture_urbs[i]); - atomic_dec(&tascam->active_urbs); - goto start_rollback; - } - atomic_inc(&tascam->active_urbs); - } - - return 0; -start_rollback: - dev_err(tascam->card->dev, - "Failed to submit URBs to start stream: %d\n", err); - do_stop = true; - } - - if (do_stop) - schedule_work(&tascam->stop_work); - - return err; -} - -int tascam_init_pcm(struct snd_pcm *pcm) -{ - struct tascam_card *tascam = pcm->private_data; - - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &tascam_playback_ops); - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &tascam_capture_ops); - - snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, - tascam->dev->dev.parent, 64 * 1024, - tascam_pcm_hw.buffer_bytes_max); - - return 0; + struct tascam_card *tascam = container_of(work, struct tascam_card, stop_pcm_work); + + if (tascam->playback_substream) + snd_pcm_stop(tascam->playback_substream, SNDRV_PCM_STATE_XRUN); } diff --git a/us144mkii_pcm.h b/us144mkii_pcm.h index 74da856..e1c6119 100644 --- a/us144mkii_pcm.h +++ b/us144mkii_pcm.h @@ -6,160 +6,18 @@ #include "us144mkii.h" -/** - * tascam_pcm_hw - Hardware capabilities for TASCAM US-144MKII PCM. - * - * Defines the supported PCM formats, rates, channels, and buffer/period sizes - * for the TASCAM US-144MKII audio interface. - */ -extern const struct snd_pcm_hardware tascam_pcm_hw; +extern const struct snd_pcm_hardware tascam_playback_hw; +extern const struct snd_pcm_hardware tascam_capture_hw; -/** - * tascam_playback_ops - ALSA PCM operations for playback. - * - * This structure defines the callback functions for playback stream operations. - */ extern const struct snd_pcm_ops tascam_playback_ops; - -/** - * tascam_capture_ops - ALSA PCM operations for capture. - * - * This structure defines the callback functions for capture stream operations. - */ extern const struct snd_pcm_ops tascam_capture_ops; -/** - * playback_urb_complete() - Completion handler for playback isochronous URBs. - * @urb: the completed URB - * - * This function runs in interrupt context. It calculates the number of bytes - * to send in the next set of packets based on the feedback-driven clock, - * copies the audio data from the ALSA ring buffer, and resubmits the URB. - */ void playback_urb_complete(struct urb *urb); - -/** - * feedback_urb_complete() - Completion handler for feedback isochronous URBs. - * @urb: the completed URB - * - * This is the master clock for the driver. It runs in interrupt context. - * It reads the feedback value from the device, which indicates how many - * samples the device has consumed. This information is used to adjust the - * playback rate and to advance the capture stream pointer, keeping both - * streams in sync. It then calls snd_pcm_period_elapsed if necessary and - * resubmits itself. - */ void feedback_urb_complete(struct urb *urb); - -/** - * capture_urb_complete() - Completion handler for capture bulk URBs. - * @urb: the completed URB - * - * This function runs in interrupt context. It copies the received raw data - * into an intermediate ring buffer and then schedules the workqueue to process - * it. It then resubmits the URB to receive more data. - */ void capture_urb_complete(struct urb *urb); - -/** - * tascam_stop_pcm_work_handler() - Work handler to stop PCM streams. - * @work: Pointer to the work_struct. - * - * This function is scheduled to stop PCM streams (playback and capture) - * from a workqueue context, avoiding blocking operations in interrupt context. - */ -void tascam_stop_pcm_work_handler(struct work_struct *work); - -/** - * tascam_init_pcm() - Initializes the ALSA PCM device. - * @pcm: Pointer to the ALSA PCM device to initialize. - * - * This function sets up the PCM operations, adds ALSA controls for routing - * and sample rate, and preallocates pages for the PCM buffer. - * - * Return: 0 on success, or a negative error code on failure. - */ -int tascam_init_pcm(struct snd_pcm *pcm); - -/** - * us144mkii_configure_device_for_rate() - Set sample rate via USB control msgs - * @tascam: the tascam_card instance - * @rate: the target sample rate (e.g., 44100, 96000) - * - * This function sends a sequence of vendor-specific and UAC control messages - * to configure the device hardware for the specified sample rate. - * - * Return: 0 on success, or a negative error code on failure. - */ int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate); - -/** - * process_playback_routing_us144mkii() - Apply playback routing matrix - * @tascam: The driver instance. - * @src_buffer: Buffer containing 4 channels of S24_3LE audio from ALSA. - * @dst_buffer: Buffer to be filled for the USB device. - * @frames: Number of frames to process. - */ -void process_playback_routing_us144mkii(struct tascam_card *tascam, - const u8 *src_buffer, u8 *dst_buffer, - size_t frames); - -/** - * process_capture_routing_us144mkii() - Apply capture routing matrix - * @tascam: The driver instance. - * @decoded_block: Buffer containing 4 channels of S32LE decoded audio. - * @routed_block: Buffer to be filled for ALSA. - */ -void process_capture_routing_us144mkii(struct tascam_card *tascam, - const s32 *decoded_block, - s32 *routed_block); - -/** - * tascam_pcm_hw_params() - Configures hardware parameters for PCM streams. - * @substream: The ALSA PCM substream. - * @params: The hardware parameters to apply. - * - * This function allocates pages for the PCM buffer and, for playback streams, - * selects the appropriate feedback patterns based on the requested sample rate. - * It also configures the device hardware for the selected sample rate if it - * has changed. - * - * Return: 0 on success, or a negative error code on failure. - */ +void tascam_stop_pcm_work_handler(struct work_struct *work); int tascam_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *params); - -/** - * tascam_pcm_hw_free() - Frees hardware parameters for PCM streams. - * @substream: The ALSA PCM substream. - * - * This function is a stub for freeing hardware-related resources. - * - * Return: 0 on success. - */ -int tascam_pcm_hw_free(struct snd_pcm_substream *substream); - -/** - * tascam_pcm_trigger() - Triggers the start or stop of PCM streams. - * @substream: The ALSA PCM substream. - * @cmd: The trigger command (e.g., SNDRV_PCM_TRIGGER_START). - * - * This function handles starting and stopping of playback and capture streams - * by submitting or killing the associated URBs. - * - * Return: 0 on success, or a negative error code on failure. - */ -int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd); - -/** - * tascam_capture_work_handler() - Deferred work for processing capture data. - * @work: the work_struct instance - * - * This function runs in a kernel thread context, not an IRQ context. It reads - * raw data from the capture ring buffer, decodes it, applies routing, and - * copies the final audio data into the ALSA capture ring buffer. This offloads - * the CPU-intensive decoding from the time-sensitive URB completion handlers. - */ -void tascam_capture_work_handler(struct work_struct *work); + struct snd_pcm_hw_params *params); #endif /* __US144MKII_PCM_H */ diff --git a/us144mkii_playback.c b/us144mkii_playback.c index 0cb9699..5c037c2 100644 --- a/us144mkii_playback.c +++ b/us144mkii_playback.c @@ -1,160 +1,196 @@ // SPDX-License-Identifier: GPL-2.0-only // Copyright (c) 2025 Šerif Rami -#include "us144mkii.h" +#include "us144mkii_pcm.h" + +const struct snd_pcm_hardware tascam_playback_hw = { + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), + .formats = SNDRV_PCM_FMTBIT_S24_3LE, + .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000), + .rate_min = 44100, + .rate_max = 96000, + .channels_min = NUM_CHANNELS, + .channels_max = NUM_CHANNELS, + .buffer_bytes_max = 1024 * 1024, + .period_bytes_min = 32 * BYTES_PER_FRAME, + .period_bytes_max = 1024 * BYTES_PER_FRAME, + .periods_min = 2, + .periods_max = 1024, +}; -/** - * tascam_playback_open() - Opens the PCM playback substream. - * @substream: The ALSA PCM substream to open. - * - * This function sets the hardware parameters for the playback substream - * and stores a reference to the substream in the driver's private data. - * - * Return: 0 on success. - */ static int tascam_playback_open(struct snd_pcm_substream *substream) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); - substream->runtime->hw = tascam_pcm_hw; + substream->runtime->hw = tascam_playback_hw; tascam->playback_substream = substream; atomic_set(&tascam->playback_active, 0); - return 0; } -/** - * tascam_playback_close() - Closes the PCM playback substream. - * @substream: The ALSA PCM substream to close. - * - * This function clears the reference to the playback substream in the - * driver's private data. - * - * Return: 0 on success. - */ static int tascam_playback_close(struct snd_pcm_substream *substream) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); + cancel_work_sync(&tascam->stop_pcm_work); tascam->playback_substream = NULL; - return 0; } -/** - * tascam_playback_prepare() - Prepares the PCM playback substream for use. - * @substream: The ALSA PCM substream to prepare. - * - * This function initializes playback-related counters and flags, and configures - * the playback URBs with appropriate packet sizes based on the nominal frame - * rate. - * - * Return: 0 on success. - */ static int tascam_playback_prepare(struct snd_pcm_substream *substream) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; int i, u; - size_t nominal_frames_per_packet, nominal_bytes_per_packet; - size_t total_bytes_in_urb; + u32 nominal_q16 = (runtime->rate << 16) / 8000; + size_t nominal_bytes = (runtime->rate / 8000) * BYTES_PER_FRAME; + + usb_kill_anchored_urbs(&tascam->playback_anchor); + usb_kill_anchored_urbs(&tascam->feedback_anchor); tascam->driver_playback_pos = 0; tascam->playback_frames_consumed = 0; - tascam->last_period_pos = 0; - tascam->feedback_pattern_in_idx = 0; - tascam->feedback_pattern_out_idx = 0; + tascam->last_pb_period_pos = 0; tascam->feedback_synced = false; - tascam->feedback_consecutive_errors = 0; tascam->feedback_urb_skip_count = NUM_FEEDBACK_URBS; - - nominal_frames_per_packet = runtime->rate / 8000; - for (i = 0; i < FEEDBACK_ACCUMULATOR_SIZE; i++) - tascam->feedback_accumulator_pattern[i] = - nominal_frames_per_packet; + tascam->phase_accum = 0; + tascam->freq_q16 = nominal_q16; for (i = 0; i < NUM_FEEDBACK_URBS; i++) { struct urb *f_urb = tascam->feedback_urbs[i]; - int j; f_urb->number_of_packets = FEEDBACK_URB_PACKETS; - f_urb->transfer_buffer_length = - FEEDBACK_URB_PACKETS * FEEDBACK_PACKET_SIZE; - for (j = 0; j < FEEDBACK_URB_PACKETS; j++) { - f_urb->iso_frame_desc[j].offset = - j * FEEDBACK_PACKET_SIZE; - f_urb->iso_frame_desc[j].length = FEEDBACK_PACKET_SIZE; + f_urb->transfer_buffer_length = FEEDBACK_URB_PACKETS * FEEDBACK_PACKET_SIZE; + for (u = 0; u < FEEDBACK_URB_PACKETS; u++) { + f_urb->iso_frame_desc[u].offset = u * FEEDBACK_PACKET_SIZE; + f_urb->iso_frame_desc[u].length = FEEDBACK_PACKET_SIZE; } } - nominal_bytes_per_packet = nominal_frames_per_packet * BYTES_PER_FRAME; - total_bytes_in_urb = nominal_bytes_per_packet * PLAYBACK_URB_PACKETS; - for (u = 0; u < NUM_PLAYBACK_URBS; u++) { struct urb *urb = tascam->playback_urbs[u]; - memset(urb->transfer_buffer, 0, - tascam->playback_urb_alloc_size); - urb->transfer_buffer_length = total_bytes_in_urb; + memset(urb->transfer_buffer, 0, tascam->playback_urb_alloc_size); urb->number_of_packets = PLAYBACK_URB_PACKETS; + urb->transfer_buffer_length = PLAYBACK_URB_PACKETS * nominal_bytes; for (i = 0; i < PLAYBACK_URB_PACKETS; i++) { - urb->iso_frame_desc[i].offset = - i * nominal_bytes_per_packet; - urb->iso_frame_desc[i].length = - nominal_bytes_per_packet; + urb->iso_frame_desc[i].offset = i * nominal_bytes; + urb->iso_frame_desc[i].length = nominal_bytes; } } - return 0; } -/** - * tascam_playback_pointer() - Returns the current playback pointer position. - * @substream: The ALSA PCM substream. - * - * This function returns the current position of the playback pointer within - * the ALSA ring buffer, in frames. - * - * Return: The current playback pointer position in frames. - */ -static snd_pcm_uframes_t -tascam_playback_pointer(struct snd_pcm_substream *substream) +static snd_pcm_uframes_t tascam_playback_pointer(struct snd_pcm_substream *substream) { struct tascam_card *tascam = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; + unsigned long flags; u64 pos; + snd_pcm_uframes_t buffer_size = substream->runtime->buffer_size; if (!atomic_read(&tascam->playback_active)) return 0; + spin_lock_irqsave(&tascam->lock, flags); + pos = tascam->playback_frames_consumed; + spin_unlock_irqrestore(&tascam->lock, flags); - scoped_guard(spinlock_irqsave, &tascam->lock) { - pos = tascam->playback_frames_consumed; + return (snd_pcm_uframes_t)(pos % buffer_size); +} + +static int tascam_playback_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct tascam_card *tascam = snd_pcm_substream_chip(substream); + int i, ret = 0; + bool start = false; + bool stop = false; + unsigned long flags; + + spin_lock_irqsave(&tascam->lock, flags); + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + if (!atomic_read(&tascam->playback_active)) { + atomic_set(&tascam->playback_active, 1); + start = true; + } + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + atomic_set(&tascam->playback_active, 0); + stop = true; + break; + default: + ret = -EINVAL; + break; + } + spin_unlock_irqrestore(&tascam->lock, flags); + + if (stop) { + /* Ensure playback_active is updated before unlinking URBs */ + smp_mb(); + for (i = 0; i < NUM_FEEDBACK_URBS; i++) { + if (tascam->feedback_urbs[i]) + usb_unlink_urb(tascam->feedback_urbs[i]); + } + for (i = 0; i < NUM_PLAYBACK_URBS; i++) { + if (tascam->playback_urbs[i]) + usb_unlink_urb(tascam->playback_urbs[i]); + } } - if (runtime->buffer_size == 0) - return 0; + if (start) { + for (i = 0; i < NUM_FEEDBACK_URBS; i++) { + usb_anchor_urb(tascam->feedback_urbs[i], &tascam->feedback_anchor); + if (usb_submit_urb(tascam->feedback_urbs[i], GFP_ATOMIC) < 0) { + usb_unanchor_urb(tascam->feedback_urbs[i]); + dev_err(&tascam->dev->dev, "Failed to submit feedback URB %d\n", i); + atomic_set(&tascam->playback_active, 0); + /* Ensure playback_active is cleared before unlinking URBs */ + smp_mb(); + for (int j = 0; j < i; j++) + usb_unlink_urb(tascam->feedback_urbs[j]); + ret = -EIO; + goto error; + } + atomic_inc(&tascam->active_urbs); + } + for (i = 0; i < NUM_PLAYBACK_URBS; i++) { + usb_anchor_urb(tascam->playback_urbs[i], &tascam->playback_anchor); + if (usb_submit_urb(tascam->playback_urbs[i], GFP_ATOMIC) < 0) { + usb_unanchor_urb(tascam->playback_urbs[i]); + dev_err(&tascam->dev->dev, "Failed to submit playback URB %d\n", i); + atomic_set(&tascam->playback_active, 0); + /* Ensure playback_active is cleared before unlinking URBs */ + smp_mb(); + for (int j = 0; j < NUM_FEEDBACK_URBS; j++) + usb_unlink_urb(tascam->feedback_urbs[j]); + for (int j = 0; j < i; j++) + usb_unlink_urb(tascam->playback_urbs[j]); + ret = -EIO; + goto error; + } + atomic_inc(&tascam->active_urbs); + } + } else if (stop && ret == 0) { + schedule_work(&tascam->stop_work); + } - return do_div(pos, runtime->buffer_size); +error: + return ret; } /** - * tascam_playback_ops - ALSA PCM operations for playback. + * playback_urb_complete() - completion handler for playback isochronous URBs + * @urb: the completed URB * - * This structure defines the callback functions for playback stream operations, - * including open, close, ioctl, hardware parameters, hardware free, prepare, - * trigger, and pointer. + * This function runs in interrupt context. It calculates the number of bytes + * to send in the next set of packets based on the feedback-driven clock, + * copies the audio data from the ALSA ring buffer, and resubmits the URB. */ -const struct snd_pcm_ops tascam_playback_ops = { - .open = tascam_playback_open, - .close = tascam_playback_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = tascam_pcm_hw_params, - .hw_free = tascam_pcm_hw_free, - .prepare = tascam_playback_prepare, - .trigger = tascam_pcm_trigger, - .pointer = tascam_playback_pointer, -}; - void playback_urb_complete(struct urb *urb) { struct tascam_card *tascam = urb->context; @@ -163,294 +199,152 @@ void playback_urb_complete(struct urb *urb) size_t total_bytes_for_urb = 0; snd_pcm_uframes_t offset_frames; snd_pcm_uframes_t frames_to_copy; - int ret, i; + int i; + unsigned long flags; + bool need_period_elapsed = false; + snd_pcm_uframes_t buffer_size, period_size; + + if (!tascam) + return; if (urb->status) { - if (urb->status != -ENOENT && urb->status != -ECONNRESET && - urb->status != -ESHUTDOWN && urb->status != -ENODEV) - dev_err_ratelimited(tascam->card->dev, - "Playback URB failed: %d\n", - urb->status); - goto out; + atomic_dec(&tascam->active_urbs); + return; + } + if (!atomic_read(&tascam->playback_active)) { + atomic_dec(&tascam->active_urbs); + return; } - if (!tascam || !atomic_read(&tascam->playback_active)) - goto out; substream = tascam->playback_substream; - if (!substream || !substream->runtime) - goto out; - runtime = substream->runtime; - - scoped_guard(spinlock_irqsave, &tascam->lock) { - for (i = 0; i < urb->number_of_packets; i++) { - unsigned int frames_for_packet; - size_t bytes_for_packet; - - if (tascam->feedback_synced) { - frames_for_packet = - tascam->feedback_accumulator_pattern - [tascam->feedback_pattern_out_idx]; - tascam->feedback_pattern_out_idx = - (tascam->feedback_pattern_out_idx + 1) % - FEEDBACK_ACCUMULATOR_SIZE; - } else { - frames_for_packet = runtime->rate / 8000; - } - bytes_for_packet = frames_for_packet * BYTES_PER_FRAME; - - urb->iso_frame_desc[i].offset = total_bytes_for_urb; - urb->iso_frame_desc[i].length = bytes_for_packet; - total_bytes_for_urb += bytes_for_packet; - } - urb->transfer_buffer_length = total_bytes_for_urb; - - offset_frames = tascam->driver_playback_pos; - frames_to_copy = bytes_to_frames(runtime, total_bytes_for_urb); - tascam->driver_playback_pos = - (offset_frames + frames_to_copy) % runtime->buffer_size; + if (!substream) { + atomic_dec(&tascam->active_urbs); + return; } + runtime = substream->runtime; + if (!runtime) { + atomic_dec(&tascam->active_urbs); + return; + } + + buffer_size = runtime->buffer_size; + period_size = runtime->period_size; + + spin_lock_irqsave(&tascam->lock, flags); + for (i = 0; i < urb->number_of_packets; i++) { + unsigned int frames_for_packet; + + tascam->phase_accum += tascam->freq_q16; + frames_for_packet = tascam->phase_accum >> 16; + tascam->phase_accum &= 0xFFFF; + urb->iso_frame_desc[i].offset = total_bytes_for_urb; + urb->iso_frame_desc[i].length = frames_for_packet * BYTES_PER_FRAME; + total_bytes_for_urb += urb->iso_frame_desc[i].length; + } + urb->transfer_buffer_length = total_bytes_for_urb; + + offset_frames = tascam->driver_playback_pos; + frames_to_copy = bytes_to_frames(runtime, total_bytes_for_urb); + tascam->driver_playback_pos = (offset_frames + frames_to_copy) % buffer_size; + spin_unlock_irqrestore(&tascam->lock, flags); if (total_bytes_for_urb > 0) { u8 *dst_buf = urb->transfer_buffer; + size_t ptr_bytes = frames_to_bytes(runtime, offset_frames); - /* Handle ring buffer wrap-around */ - if (offset_frames + frames_to_copy > runtime->buffer_size) { - size_t first_chunk_bytes = frames_to_bytes( - runtime, runtime->buffer_size - offset_frames); - size_t second_chunk_bytes = - total_bytes_for_urb - first_chunk_bytes; + if (offset_frames + frames_to_copy > buffer_size) { + size_t part1 = buffer_size - offset_frames; - memcpy(dst_buf, - runtime->dma_area + - frames_to_bytes(runtime, offset_frames), - first_chunk_bytes); - memcpy(dst_buf + first_chunk_bytes, runtime->dma_area, - second_chunk_bytes); + memcpy(dst_buf, runtime->dma_area + ptr_bytes, frames_to_bytes(runtime, part1)); + memcpy(dst_buf + frames_to_bytes(runtime, part1), runtime->dma_area, total_bytes_for_urb - frames_to_bytes(runtime, part1)); } else { - memcpy(dst_buf, - runtime->dma_area + - frames_to_bytes(runtime, offset_frames), - total_bytes_for_urb); + memcpy(dst_buf, runtime->dma_area + ptr_bytes, total_bytes_for_urb); } - - process_playback_routing_us144mkii(tascam, dst_buf, dst_buf, - frames_to_copy); } - urb->dev = tascam->dev; - usb_get_urb(urb); - usb_anchor_urb(urb, &tascam->playback_anchor); - ret = usb_submit_urb(urb, GFP_ATOMIC); - if (ret < 0) { - dev_err_ratelimited(tascam->card->dev, - "Failed to resubmit playback URB: %d\n", - ret); - usb_unanchor_urb(urb); - usb_put_urb(urb); - atomic_dec( - &tascam->active_urbs); /* Decrement on failed resubmission */ + spin_lock_irqsave(&tascam->lock, flags); + tascam->playback_frames_consumed += frames_to_copy; + + if (period_size > 0) { + u64 current_period = div_u64(tascam->playback_frames_consumed, period_size); + + if (current_period > tascam->last_pb_period_pos) { + tascam->last_pb_period_pos = current_period; + need_period_elapsed = true; + } } -out: - usb_put_urb(urb); + spin_unlock_irqrestore(&tascam->lock, flags); + + if (need_period_elapsed) + snd_pcm_period_elapsed(substream); + + if (usb_submit_urb(urb, GFP_ATOMIC) < 0) + atomic_dec(&tascam->active_urbs); } +/** + * feedback_urb_complete() - completion handler for feedback isochronous URBs + * @urb: the completed URB + * + * This is the master clock for the driver. It runs in interrupt context. + * It reads the feedback value from the device, which indicates how many + * samples the device has consumed. This information is used to adjust the + * playback rate and to advance the capture stream pointer, keeping both + * streams in sync. It then calls snd_pcm_period_elapsed if necessary and + * resubmits itself. + */ void feedback_urb_complete(struct urb *urb) { struct tascam_card *tascam = urb->context; - struct snd_pcm_substream *playback_ss, *capture_ss; - struct snd_pcm_runtime *playback_rt, *capture_rt; - u64 total_frames_in_urb = 0; int ret, p; - unsigned int old_in_idx, new_in_idx; - bool playback_period_elapsed = false; - bool capture_period_elapsed = false; + unsigned long flags; + + if (!tascam) + return; if (urb->status) { - if (urb->status != -ENOENT && urb->status != -ECONNRESET && - urb->status != -ESHUTDOWN && urb->status != -ENODEV) { - dev_err_ratelimited(tascam->card->dev, - "Feedback URB failed: %d\n", - urb->status); - atomic_dec( - &tascam->active_urbs); /* Decrement on failed resubmission */ - } - goto out; + atomic_dec(&tascam->active_urbs); + return; + } + if (!atomic_read(&tascam->playback_active)) { + atomic_dec(&tascam->active_urbs); + return; } - if (!tascam || !atomic_read(&tascam->playback_active)) - goto out; - playback_ss = tascam->playback_substream; - if (!playback_ss || !playback_ss->runtime) - goto out; - playback_rt = playback_ss->runtime; + spin_lock_irqsave(&tascam->lock, flags); + if (tascam->feedback_urb_skip_count > 0) { + tascam->feedback_urb_skip_count--; + spin_unlock_irqrestore(&tascam->lock, flags); + goto resubmit; + } - capture_ss = tascam->capture_substream; - capture_rt = capture_ss ? capture_ss->runtime : NULL; + for (p = 0; p < urb->number_of_packets; p++) { + if (urb->iso_frame_desc[p].status == 0 && urb->iso_frame_desc[p].actual_length >= 3) { + u8 *data = (u8 *)urb->transfer_buffer + urb->iso_frame_desc[p].offset; + u32 sum = data[0] + data[1] + data[2]; + u32 target_freq_q16 = ((sum * 65536) / 3) / 8; - scoped_guard(spinlock_irqsave, &tascam->lock) { - if (tascam->feedback_urb_skip_count > 0) { - tascam->feedback_urb_skip_count--; - break; - } - - old_in_idx = tascam->feedback_pattern_in_idx; - - for (p = 0; p < urb->number_of_packets; p++) { - u8 feedback_value = 0; - const unsigned int *pattern; - bool packet_ok = - (urb->iso_frame_desc[p].status == 0 && - urb->iso_frame_desc[p].actual_length >= 1); - - if (packet_ok) - feedback_value = - *((u8 *)urb->transfer_buffer + - urb->iso_frame_desc[p].offset); - - if (packet_ok) { - int delta = feedback_value - - tascam->fpo.base_feedback_value + - tascam->fpo.feedback_offset; - int pattern_idx; - - if (delta < 0) { - pattern_idx = - 0; // Clamp to the lowest pattern - } else if (delta >= 5) { - pattern_idx = - 4; // Clamp to the highest pattern - } else { - pattern_idx = delta; - } - - pattern = - tascam->fpo - .full_frame_patterns[pattern_idx]; - tascam->feedback_consecutive_errors = 0; - int i; - - for (i = 0; i < 8; i++) { - unsigned int in_idx = - (tascam->feedback_pattern_in_idx + - i) % - FEEDBACK_ACCUMULATOR_SIZE; - - tascam->feedback_accumulator_pattern - [in_idx] = pattern[i]; - total_frames_in_urb += pattern[i]; - } - } else { - unsigned int nominal_frames = - playback_rt->rate / 8000; - int i; - - if (tascam->feedback_synced) { - tascam->feedback_consecutive_errors++; - if (tascam->feedback_consecutive_errors > - FEEDBACK_SYNC_LOSS_THRESHOLD) { - dev_err(tascam->card->dev, - "Fatal: Feedback sync lost. Stopping stream.\n"); - schedule_work( - &tascam->stop_pcm_work); - tascam->feedback_synced = false; - break; - } - } - for (i = 0; i < 8; i++) { - unsigned int in_idx = - (tascam->feedback_pattern_in_idx + - i) % - FEEDBACK_ACCUMULATOR_SIZE; - - tascam->feedback_accumulator_pattern - [in_idx] = nominal_frames; - total_frames_in_urb += nominal_frames; - } - } - tascam->feedback_pattern_in_idx = - (tascam->feedback_pattern_in_idx + 8) % - FEEDBACK_ACCUMULATOR_SIZE; - } - - new_in_idx = tascam->feedback_pattern_in_idx; - - if (!tascam->feedback_synced) { - unsigned int out_idx = tascam->feedback_pattern_out_idx; - bool is_ahead = (new_in_idx - out_idx) % - FEEDBACK_ACCUMULATOR_SIZE < - (FEEDBACK_ACCUMULATOR_SIZE / 2); - bool was_behind = (old_in_idx - out_idx) % - FEEDBACK_ACCUMULATOR_SIZE >= - (FEEDBACK_ACCUMULATOR_SIZE / 2); - - if (is_ahead && was_behind) { - dev_dbg(tascam->card->dev, - "Sync Acquired! (in: %u, out: %u)\n", - new_in_idx, out_idx); - tascam->feedback_synced = true; - tascam->feedback_consecutive_errors = 0; - } - } - - if (total_frames_in_urb > 0) { - tascam->playback_frames_consumed += total_frames_in_urb; - if (atomic_read(&tascam->capture_active)) - tascam->capture_frames_processed += - total_frames_in_urb; - } - - if (playback_rt->period_size > 0) { - u64 current_period = - div_u64(tascam->playback_frames_consumed, - playback_rt->period_size); - - if (current_period > tascam->last_period_pos) { - tascam->last_period_pos = current_period; - playback_period_elapsed = true; - } - } - - if (atomic_read(&tascam->capture_active) && capture_rt && - capture_rt->period_size > 0) { - u64 current_capture_period = - div_u64(tascam->capture_frames_processed, - capture_rt->period_size); - - if (current_capture_period > - tascam->last_capture_period_pos) { - tascam->last_capture_period_pos = - current_capture_period; - capture_period_elapsed = true; - } + tascam->freq_q16 = (tascam->freq_q16 * PLL_FILTER_OLD_WEIGHT + target_freq_q16 * PLL_FILTER_NEW_WEIGHT) / PLL_FILTER_DIVISOR; + tascam->feedback_synced = true; } } - if (playback_period_elapsed) - snd_pcm_period_elapsed(playback_ss); - if (capture_period_elapsed) - snd_pcm_period_elapsed(capture_ss); + spin_unlock_irqrestore(&tascam->lock, flags); - urb->dev = tascam->dev; - usb_get_urb(urb); - usb_anchor_urb(urb, &tascam->feedback_anchor); +resubmit: ret = usb_submit_urb(urb, GFP_ATOMIC); if (ret < 0) { - dev_err_ratelimited(tascam->card->dev, - "Failed to resubmit feedback URB: %d\n", - ret); usb_unanchor_urb(urb); - usb_put_urb(urb); + atomic_dec(&tascam->active_urbs); } -out: - usb_put_urb(urb); } -void tascam_stop_pcm_work_handler(struct work_struct *work) -{ - struct tascam_card *tascam = - container_of(work, struct tascam_card, stop_pcm_work); - - if (tascam->playback_substream) - snd_pcm_stop(tascam->playback_substream, SNDRV_PCM_STATE_XRUN); - if (tascam->capture_substream) - snd_pcm_stop(tascam->capture_substream, SNDRV_PCM_STATE_XRUN); -} +const struct snd_pcm_ops tascam_playback_ops = { + .open = tascam_playback_open, + .close = tascam_playback_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = tascam_pcm_hw_params, + .hw_free = NULL, + .prepare = tascam_playback_prepare, + .trigger = tascam_playback_trigger, + .pointer = tascam_playback_pointer, +};