From 77cef83304c92402a133fc936c44d182fc99ecf0 Mon Sep 17 00:00:00 2001 From: Saulo Veríssimo Date: Tue, 24 Mar 2026 23:38:14 -0300 Subject: test: add MIDI 2.0 Device and Host unit tests Add unit tests for MIDI 2.0 drivers: - Device: UMP word count (all 16 message types), descriptor macro validation (length, byte layout, alt settings, endpoints), CS endpoint subtypes, traversal integrity - Host: UMP word count, callback struct validation, CS endpoint subtypes Also add Sphinx documentation for MIDI 2.0 class drivers (Device and Host API reference, lifecycle, configuration, examples). Tests: 60/60 PASS (FIFO 26/26, USBD 5/5, MIDI2 Device 18/18, MIDI2 Host 6/6, USBD internal 5/5) --- docs/reference/class_drivers.rst | 316 +++++++++++++++++++++++++++++++++++++++ docs/reference/index.rst | 1 + 2 files changed, 317 insertions(+) create mode 100644 docs/reference/class_drivers.rst (limited to 'docs') diff --git a/docs/reference/class_drivers.rst b/docs/reference/class_drivers.rst new file mode 100644 index 000000000..9ed332acb --- /dev/null +++ b/docs/reference/class_drivers.rst @@ -0,0 +1,316 @@ +*************** +Class Drivers +*************** + +USB Class Drivers implement specific USB device classes (CDC, HID, MSC, MIDI, Audio, etc.) and are the main interface between the USB core and application code. + +MIDI 2.0 Device Driver +======================= + +Overview +-------- + +The MIDI 2.0 Device driver enables TinyUSB to act as a USB MIDI 2.0 device. It implements both Alt Setting 0 (MIDI 1.0 fallback) and Alt Setting 1 (native UMP) as required by the USB-MIDI 2.0 specification. + +**Key Features:** + +- **Dual Alt Settings**: Alt 0 (MIDI 1.0) and Alt 1 (UMP native) per USB-MIDI 2.0 spec +- **Protocol Negotiation**: Endpoint Discovery, Config Request/Notify, Function Block Discovery +- **Group Terminal Block**: Served via GET_DESCRIPTOR automatically +- **Atomic UMP Framing**: Read/write with correct message boundaries +- **Memory Safe**: No dynamic allocation, static instances + +Configuration +------------- + +Enable MIDI 2.0 Device support in ``tusb_config.h``: + +.. code-block:: c + + #define CFG_TUD_ENABLED 1 + #define CFG_TUD_MIDI2 1 + +Optional configuration: + +.. code-block:: c + + #define CFG_TUD_MIDI2_TX_BUFSIZE 256 + #define CFG_TUD_MIDI2_RX_BUFSIZE 256 + #define CFG_TUD_MIDI2_TX_EPSIZE 64 + #define CFG_TUD_MIDI2_RX_EPSIZE 64 + #define CFG_TUD_MIDI2_NUM_GROUPS 1 // 1..16 + #define CFG_TUD_MIDI2_NUM_FUNCTION_BLOCKS 1 // 1..32 + #define CFG_TUD_MIDI2_EP_NAME "TinyUSB MIDI 2.0" + #define CFG_TUD_MIDI2_PRODUCT_ID "TinyUSB-MIDI2" + +Public API +---------- + +Query Functions +^^^^^^^^^^^^^^^ + +.. code-block:: c + + bool tud_midi2_mounted(void); + uint32_t tud_midi2_available(void); + uint8_t tud_midi2_alt_setting(void); + bool tud_midi2_negotiated(void); + uint8_t tud_midi2_protocol(void); + +I/O Functions +^^^^^^^^^^^^^ + +.. code-block:: c + + uint32_t tud_midi2_ump_read(uint32_t* words, uint32_t max_words); + uint32_t tud_midi2_ump_write(const uint32_t* words, uint32_t count); + bool tud_midi2_packet_read(uint8_t packet[4]); + bool tud_midi2_packet_write(const uint8_t packet[4]); + +Callbacks +^^^^^^^^^ + +.. code-block:: c + + void tud_midi2_rx_cb(uint8_t itf); + void tud_midi2_set_itf_cb(uint8_t itf, uint8_t alt); + bool tud_midi2_get_req_itf_cb(uint8_t rhport, const tusb_control_request_t* request); + +MIDI 2.0 Host Driver +===================== + +Overview +-------- + +The MIDI 2.0 Host driver enables TinyUSB to enumerate and communicate with USB MIDI 2.0 devices. It implements the USB MIDI 2.0 specification, supporting both MIDI 1.0 legacy devices and modern MIDI 2.0 devices with UMP (Universal MIDI Packet) protocol. + +**Key Features:** + +- **Reactive Architecture**: Auto-detects Alt Setting 1 (MIDI 2.0) capability during enumeration +- **Auto-Selection**: Automatically selects the highest available protocol (MIDI 2.0 preferred) +- **Transparent Stream Messages**: All data (UMP packets + Stream Messages) flow through callbacks +- **Memory Safe**: No dynamic allocation, fixed-size instances per device + +Configuration +------------- + +Enable MIDI 2.0 Host support in ``tusb_config.h``: + +.. code-block:: c + + #define CFG_TUH_ENABLED 1 + #define CFG_TUH_MIDI2 4 // Number of MIDI 2.0 devices to support + +Optional buffer configuration: + +.. code-block:: c + + #define CFG_TUH_MIDI2_RX_BUFSIZE (4 * TUH_EPSIZE_BULK_MAX) + #define CFG_TUH_MIDI2_TX_BUFSIZE (4 * TUH_EPSIZE_BULK_MAX) + +Enumeration Lifecycle +--------------------- + +When a MIDI 2.0 device is connected, the host stack invokes callbacks in this order: + +.. code-block:: none + + Device Connected + | + [Host detects Alt 0 and Alt 1 descriptors] + | + tuh_midi2_descriptor_cb() <- Device detected, NOT yet ready + | + [Auto-select highest protocol] + | + tuh_midi2_mount_cb() <- Device ready to use + | + [Application can read/write data] + | + tuh_midi2_rx_cb() <- Data arrived + tuh_midi2_tx_cb() <- TX buffer space available + | + [Device disconnects] + | + tuh_midi2_umount_cb() <- Device removed + +Public API +---------- + +Query Functions +^^^^^^^^^^^^^^^ + +.. code-block:: c + + bool tuh_midi2_mounted(uint8_t idx); + uint8_t tuh_midi2_get_protocol_version(uint8_t idx); // 0=MIDI 1.0, 1=MIDI 2.0 + uint8_t tuh_midi2_get_alt_setting_active(uint8_t idx); // 0 or 1 + uint8_t tuh_midi2_get_cable_count(uint8_t idx); + +I/O Functions +^^^^^^^^^^^^^ + +Read and write UMP (Universal MIDI Packet) data: + +.. code-block:: c + + uint32_t tuh_midi2_ump_read(uint8_t idx, uint32_t* words, uint32_t max_words); + uint32_t tuh_midi2_ump_write(uint8_t idx, const uint32_t* words, uint32_t count); + uint32_t tuh_midi2_write_flush(uint8_t idx); + +Callbacks +--------- + +Application can define weak callback implementations to respond to device events. + +Descriptor Callback +^^^^^^^^^^^^^^^^^^^ + +Invoked when device is detected but not yet ready for I/O: + +.. code-block:: c + + void tuh_midi2_descriptor_cb(uint8_t idx, const tuh_midi2_descriptor_cb_t *desc_cb_data) { + printf("MIDI %s device detected\r\n", + desc_cb_data->protocol_version == 0 ? "1.0" : "2.0"); + } + +Mount Callback +^^^^^^^^^^^^^^ + +Invoked when device is ready for I/O: + +.. code-block:: c + + void tuh_midi2_mount_cb(uint8_t idx, const tuh_midi2_mount_cb_t *mount_cb_data) { + printf("Device mounted at idx=%u, protocol=%u, alt_setting=%u\r\n", + idx, mount_cb_data->protocol_version, mount_cb_data->alt_setting_active); + } + +RX Callback +^^^^^^^^^^^ + +Invoked when data arrives from device (both UMP packets and Stream Messages): + +.. code-block:: c + + void tuh_midi2_rx_cb(uint8_t idx, uint32_t xferred_bytes) { + uint32_t words[4]; + uint32_t n = tuh_midi2_ump_read(idx, words, 4); + + for (uint32_t i = 0; i < n; i++) { + uint8_t mt = (words[i] >> 28) & 0x0F; + if (mt == 0x0F) { + // Stream Message - app handles discovery, negotiation, etc. + } else { + // Regular MIDI UMP packet + } + } + } + +TX Callback +^^^^^^^^^^^ + +Invoked when TX buffer space becomes available: + +.. code-block:: c + + void tuh_midi2_tx_cb(uint8_t idx, uint32_t xferred_bytes) { + // Buffer space available for writing + } + +Unmount Callback +^^^^^^^^^^^^^^^^ + +Invoked when device is disconnected: + +.. code-block:: c + + void tuh_midi2_umount_cb(uint8_t idx) { + printf("Device at idx=%u disconnected\r\n", idx); + } + +Complete Example +---------------- + +.. code-block:: c + + #include "tusb.h" + + void tuh_midi2_mount_cb(uint8_t idx, const tuh_midi2_mount_cb_t *mount_cb_data) { + printf("MIDI 2.0 device mounted\r\n"); + } + + void tuh_midi2_rx_cb(uint8_t idx, uint32_t xferred_bytes) { + uint32_t words[4]; + uint32_t n = tuh_midi2_ump_read(idx, words, 4); + + for (uint32_t i = 0; i < n; i++) { + printf("RX: 0x%08lx\r\n", words[i]); + } + } + + void tuh_midi2_umount_cb(uint8_t idx) { + printf("MIDI 2.0 device disconnected\r\n"); + } + + int main(void) { + board_init(); + + tusb_rhport_init_t host_init = {.role = TUSB_ROLE_HOST, .speed = TUSB_SPEED_AUTO}; + tusb_init(BOARD_TUH_RHPORT, &host_init); + + while (1) { + tuh_task(); + } + } + +Architecture +------------ + +The MIDI 2.0 Host driver uses a **reactive, callback-driven architecture** that mirrors the proven patterns in TinyUSB's existing device drivers (CDC, HID, etc.): + +- **Auto-Detection**: Host automatically detects Alt Setting 1 capability +- **Auto-Selection**: Selects highest protocol available (MIDI 2.0 preferred) +- **Application Control**: App makes protocol behavior decisions via callbacks +- **Transparent I/O**: Stream Messages and UMP packets flow transparently + +Differences from MIDI 1.0 Host +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +.. list-table:: + :header-rows: 1 + + * - Aspect + - MIDI 1.0 Host + - MIDI 2.0 Host + * - Alt Settings + - Parses only Alt 0 + - Parses Alt 0 + Alt 1 + * - Data Format + - 4-byte MIDI packets + - UMP (32/64/128-bit) + * - Version Detection + - None + - bcdMSC from descriptor + * - GTB + - N/A + - Presence detection + * - Stream Messages + - N/A + - Transparent passthrough + * - Callbacks + - descriptor_cb, mount_cb, rx_cb, umount_cb + - descriptor_cb, mount_cb, rx_cb, tx_cb, umount_cb + * - Public API + - tuh_midi_* + - tuh_midi2_* + +Implementation Notes +-------------------- + +- All internal state is statically allocated (no dynamic allocation) +- Endpoint streams use TinyUSB's tu_edpt_stream_t for buffered I/O +- Protocol version detection via bcdMSC field +- Alt Setting is automatically selected during mount +- Compatible with all TinyUSB-supported MCU families diff --git a/docs/reference/index.rst b/docs/reference/index.rst index d3c96eeee..148e8a63b 100644 --- a/docs/reference/index.rst +++ b/docs/reference/index.rst @@ -9,6 +9,7 @@ Complete reference documentation for TinyUSB APIs, configuration, and supported architecture usb_concepts + class_drivers boards dependencies concurrency -- cgit v1.3.1 From fa9edeff9c00ee1fc4ee7ab9938b1a5955a6281a Mon Sep 17 00:00:00 2001 From: Saulo Veríssimo Date: Wed, 25 Mar 2026 07:05:56 -0300 Subject: fix: address PR review feedback for MIDI 2.0 drivers Host driver (midi2_host.c): - midih2_open() now returns actual parsed length instead of max_len, preventing composite device interface conflicts - Parsers (alt0/alt1) refactored to return const uint8_t* end pointer following midi_host.c switch/case pattern - Alt 1 CS Endpoint now parses MIDI 2.0 layout (bNumGrpTrmBlk at offset 3 with MIDI_CS_ENDPOINT_GENERAL_2_0 subtype check) instead of reusing MIDI 1.0 struct (bNumEmbMIDIJack) - midih2_set_config() now issues SET_INTERFACE control request via tuh_interface_set() before completing configuration. Falls back to alt 0 if SET_INTERFACE fails - Extracted midih2_set_config_complete() and midih2_set_interface_cb() for async SET_INTERFACE handling Device driver (midi2_device.c): - midi2d_open() skip loop now checks bInterfaceNumber, stopping at interfaces that belong to other functions in composite devices - SET_INTERFACE handler now rejects alt > 1 (returns false/stall) - Named constants for GTB descriptor types and MIDI protocol values Descriptor macros (usbd.h): - TUD_MIDI2_DESC_ALT1_HEAD: iInterface set to 0 (consistent with Alt 0), wTotalLength now uses TUD_MIDI2_DESC_ALT1_CS_LEN to cover all Alt 1 class-specific descriptors - TUD_MIDI2_DESC_ALT1_EP: now accepts GTB ID list via variadic args, emitting complete CS endpoint descriptor Host example: - CMakeLists.txt restricted to rp2040 family (display.c requires Pico SDK headers) - display.c: null terminator after strncpy in log scroll Documentation: - class_drivers.rst updated to reflect SET_INTERFACE behavior and auto-select with fallback Addresses: Codex P1 (#1, #2, #3), Copilot (#4-#9) --- docs/reference/class_drivers.rst | 8 +- examples/host/midi2_host/CMakeLists.txt | 3 +- examples/host/midi2_host/src/display.c | 1 + src/class/midi/midi2_device.c | 14 ++- src/class/midi/midi2_host.c | 213 ++++++++++++++++++++------------ src/device/usbd.h | 24 ++-- 6 files changed, 166 insertions(+), 97 deletions(-) (limited to 'docs') diff --git a/docs/reference/class_drivers.rst b/docs/reference/class_drivers.rst index 9ed332acb..3ac0d8d4e 100644 --- a/docs/reference/class_drivers.rst +++ b/docs/reference/class_drivers.rst @@ -87,7 +87,7 @@ The MIDI 2.0 Host driver enables TinyUSB to enumerate and communicate with USB M **Key Features:** - **Reactive Architecture**: Auto-detects Alt Setting 1 (MIDI 2.0) capability during enumeration -- **Auto-Selection**: Automatically selects the highest available protocol (MIDI 2.0 preferred) +- **Auto-Selection**: Automatically selects the highest available protocol and issues SET_INTERFACE to activate Alt Setting 1 when MIDI 2.0 is detected - **Transparent Stream Messages**: All data (UMP packets + Stream Messages) flow through callbacks - **Memory Safe**: No dynamic allocation, fixed-size instances per device @@ -271,9 +271,9 @@ Architecture The MIDI 2.0 Host driver uses a **reactive, callback-driven architecture** that mirrors the proven patterns in TinyUSB's existing device drivers (CDC, HID, etc.): - **Auto-Detection**: Host automatically detects Alt Setting 1 capability -- **Auto-Selection**: Selects highest protocol available (MIDI 2.0 preferred) -- **Application Control**: App makes protocol behavior decisions via callbacks -- **Transparent I/O**: Stream Messages and UMP packets flow transparently +- **Auto-Selection**: Selects highest protocol available and issues SET_INTERFACE +- **Transparent I/O**: Stream Messages and UMP packets flow through callbacks +- **Callback-Driven**: App receives events via callbacks (descriptor, mount, rx, tx, unmount) Differences from MIDI 1.0 Host ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ diff --git a/examples/host/midi2_host/CMakeLists.txt b/examples/host/midi2_host/CMakeLists.txt index 221de7adf..cd70d122a 100644 --- a/examples/host/midi2_host/CMakeLists.txt +++ b/examples/host/midi2_host/CMakeLists.txt @@ -6,7 +6,8 @@ project(midi2_host C CXX ASM) family_initialize_project(${PROJECT_NAME} ${CMAKE_CURRENT_LIST_DIR}) -if(FAMILY STREQUAL "espressif") +# This example requires PIO-USB and Pico SDK (I2C, SSD1306 display) +if(NOT FAMILY STREQUAL "rp2040") return() endif() diff --git a/examples/host/midi2_host/src/display.c b/examples/host/midi2_host/src/display.c index 6d81bcd5c..4745c2961 100644 --- a/examples/host/midi2_host/src/display.c +++ b/examples/host/midi2_host/src/display.c @@ -190,6 +190,7 @@ void display_log(const char* text, uint16_t color) { if (log_count >= LOG_LINES) { for (int i = 0; i < LOG_LINES - 1; i++) { strncpy(log_lines[i], log_lines[i + 1], CHARS_PER_LINE); + log_lines[i][CHARS_PER_LINE] = '\0'; } log_count = LOG_LINES - 1; } diff --git a/src/class/midi/midi2_device.c b/src/class/midi/midi2_device.c index 9363aac11..aecbda4c5 100644 --- a/src/class/midi/midi2_device.c +++ b/src/class/midi/midi2_device.c @@ -505,12 +505,19 @@ uint16_t midi2d_open(uint8_t rhport, const tusb_desc_interface_t* desc_itf, uint } // Skip remaining descriptors (alt setting 1, CS endpoints, GTB) + // Stop at any interface descriptor that is not our MIDI Streaming alt setting while (tu_desc_in_bounds(p_desc, desc_end)) { uint8_t dtype = tu_desc_type(p_desc); - if (dtype != TUSB_DESC_CS_INTERFACE && dtype != TUSB_DESC_CS_ENDPOINT && - dtype != TUSB_DESC_INTERFACE && dtype != TUSB_DESC_ENDPOINT) { + + if (dtype == TUSB_DESC_INTERFACE) { + const tusb_desc_interface_t* next_itf = (const tusb_desc_interface_t*) p_desc; + // Continue only if this is an alternate setting of our own interface + if (next_itf->bInterfaceNumber != desc_midi->bInterfaceNumber) break; + } else if (dtype != TUSB_DESC_CS_INTERFACE && dtype != TUSB_DESC_CS_ENDPOINT && + dtype != TUSB_DESC_ENDPOINT) { break; } + p_desc = tu_desc_next(p_desc); } @@ -528,6 +535,9 @@ bool midi2d_control_xfer_cb(uint8_t rhport, uint8_t stage, const tusb_control_re uint8_t itf_num = tu_u16_low(request->wIndex); uint8_t alt = tu_u16_low(request->wValue); + // Only Alt Setting 0 (MIDI 1.0) and 1 (UMP) are valid + if (alt > 1) return false; + uint8_t idx = find_midi2_itf_by_num(itf_num); if (idx >= CFG_TUD_MIDI2) return false; diff --git a/src/class/midi/midi2_host.c b/src/class/midi/midi2_host.c index beb441b56..5b9f98f8b 100644 --- a/src/class/midi/midi2_host.c +++ b/src/class/midi/midi2_host.c @@ -125,9 +125,10 @@ static inline uint8_t get_idx_by_ep_addr(uint8_t daddr, uint8_t ep_addr) { // Descriptor parsing //--------------------------------------------------------------------+ -static void midih2_parse_descriptors_alt0(midih2_interface_t *p_midi, +// Parse Alt Setting 0 (MIDI 1.0) descriptors. Returns pointer past last consumed descriptor. +static const uint8_t* midih2_parse_descriptors_alt0(midih2_interface_t *p_midi, const tusb_desc_interface_t *desc_itf, const uint8_t *desc_end) { - TU_VERIFY(AUDIO_SUBCLASS_MIDI_STREAMING == desc_itf->bInterfaceSubClass,); + TU_VERIFY(AUDIO_SUBCLASS_MIDI_STREAMING == desc_itf->bInterfaceSubClass, NULL); p_midi->bInterfaceNumber = desc_itf->bInterfaceNumber; @@ -136,93 +137,113 @@ static void midih2_parse_descriptors_alt0(midih2_interface_t *p_midi, uint8_t rx_cable_count = 0; uint8_t tx_cable_count = 0; + bool found_new_interface = false; - while (tu_desc_in_bounds(p_desc, desc_end)) { - if (tu_desc_type(p_desc) == TUSB_DESC_INTERFACE) { - break; - } - - if (tu_desc_type(p_desc) == TUSB_DESC_ENDPOINT) { - const tusb_desc_endpoint_t *p_ep = (const tusb_desc_endpoint_t *) p_desc; - - // Open endpoint and stream - TU_ASSERT(tuh_edpt_open(p_midi->daddr, p_ep),); - if (tu_edpt_dir(p_ep->bEndpointAddress) == TUSB_DIR_IN) { - tu_edpt_stream_open(&p_midi->ep_stream.rx, p_midi->daddr, p_ep, tu_edpt_packet_size(p_ep)); - tu_edpt_stream_clear(&p_midi->ep_stream.rx); - } else { - tu_edpt_stream_open(&p_midi->ep_stream.tx, p_midi->daddr, p_ep, tu_edpt_packet_size(p_ep)); - tu_edpt_stream_clear(&p_midi->ep_stream.tx); - } - - p_desc = tu_desc_next(p_desc); + while (tu_desc_in_bounds(p_desc, desc_end) && !found_new_interface) { + switch (tu_desc_type(p_desc)) { + case TUSB_DESC_INTERFACE: + found_new_interface = true; + break; - if (tu_desc_in_bounds(p_desc, desc_end) && tu_desc_type(p_desc) == TUSB_DESC_CS_ENDPOINT) { - const midi_desc_cs_endpoint_t *p_csep = (const midi_desc_cs_endpoint_t *) p_desc; + case TUSB_DESC_ENDPOINT: { + const tusb_desc_endpoint_t *p_ep = (const tusb_desc_endpoint_t *) p_desc; - if (tu_edpt_dir(p_ep->bEndpointAddress) == TUSB_DIR_OUT) { - tx_cable_count = p_csep->bNumEmbMIDIJack; + TU_ASSERT(tuh_edpt_open(p_midi->daddr, p_ep), NULL); + if (tu_edpt_dir(p_ep->bEndpointAddress) == TUSB_DIR_IN) { + tu_edpt_stream_open(&p_midi->ep_stream.rx, p_midi->daddr, p_ep, tu_edpt_packet_size(p_ep)); + tu_edpt_stream_clear(&p_midi->ep_stream.rx); } else { - rx_cable_count = p_csep->bNumEmbMIDIJack; + tu_edpt_stream_open(&p_midi->ep_stream.tx, p_midi->daddr, p_ep, tu_edpt_packet_size(p_ep)); + tu_edpt_stream_clear(&p_midi->ep_stream.tx); + } + + p_desc = tu_desc_next(p_desc); + if (tu_desc_in_bounds(p_desc, desc_end) && tu_desc_type(p_desc) == TUSB_DESC_CS_ENDPOINT) { + const midi_desc_cs_endpoint_t *p_csep = (const midi_desc_cs_endpoint_t *) p_desc; + if (tu_edpt_dir(p_ep->bEndpointAddress) == TUSB_DIR_OUT) { + tx_cable_count = p_csep->bNumEmbMIDIJack; + } else { + rx_cable_count = p_csep->bNumEmbMIDIJack; + } } + break; } + + default: + break; } - p_desc = tu_desc_next(p_desc); + if (!found_new_interface) { + p_desc = tu_desc_next(p_desc); + } } p_midi->rx_cable_count_alt0 = rx_cable_count; p_midi->tx_cable_count_alt0 = tx_cable_count; + return p_desc; } -static void midih2_parse_descriptors_alt1(midih2_interface_t *p_midi, +// Parse Alt Setting 1 (MIDI 2.0 UMP) descriptors. Returns pointer past last consumed descriptor. +static const uint8_t* midih2_parse_descriptors_alt1(midih2_interface_t *p_midi, const tusb_desc_interface_t *desc_itf, const uint8_t *desc_end) { - TU_VERIFY(AUDIO_SUBCLASS_MIDI_STREAMING == desc_itf->bInterfaceSubClass,); - TU_VERIFY(desc_itf->bAlternateSetting == 1,); + TU_VERIFY(AUDIO_SUBCLASS_MIDI_STREAMING == desc_itf->bInterfaceSubClass, NULL); + TU_VERIFY(desc_itf->bAlternateSetting == 1, NULL); const uint8_t *p_desc = (const uint8_t *) desc_itf; p_desc = tu_desc_next(p_desc); uint8_t rx_cable_count = 0; uint8_t tx_cable_count = 0; + bool found_new_interface = false; - while (tu_desc_in_bounds(p_desc, desc_end)) { - if (tu_desc_type(p_desc) == TUSB_DESC_INTERFACE) { - break; - } + while (tu_desc_in_bounds(p_desc, desc_end) && !found_new_interface) { + switch (tu_desc_type(p_desc)) { + case TUSB_DESC_INTERFACE: + found_new_interface = true; + break; - if (tu_desc_type(p_desc) == TUSB_DESC_CS_INTERFACE) { - if (tu_desc_subtype(p_desc) == MIDI_CS_INTERFACE_HEADER) { - const uint8_t *bcd_ptr = p_desc + 3; - p_midi->bcdMSC_lo = bcd_ptr[0]; - p_midi->bcdMSC_hi = bcd_ptr[1]; + case TUSB_DESC_CS_INTERFACE: + if (tu_desc_subtype(p_desc) == MIDI_CS_INTERFACE_HEADER) { + // bcdMSC at offset 3-4 in CS Interface Header + const uint8_t *bcd_ptr = p_desc + 3; + p_midi->bcdMSC_lo = bcd_ptr[0]; + p_midi->bcdMSC_hi = bcd_ptr[1]; + if (p_midi->bcdMSC_hi == 0x02) { // bcdMSC 0x0200 = USB-MIDI 2.0 + p_midi->protocol_version = 1; + } + } + break; - if (p_midi->bcdMSC_hi == 0x02) { - p_midi->protocol_version = 1; + case TUSB_DESC_ENDPOINT: { + const tusb_desc_endpoint_t *p_ep = (const tusb_desc_endpoint_t *) p_desc; + p_desc = tu_desc_next(p_desc); + + if (tu_desc_in_bounds(p_desc, desc_end) && tu_desc_type(p_desc) == TUSB_DESC_CS_ENDPOINT) { + // MIDI 2.0 CS Endpoint General 2.0: bNumGrpTrmBlk at offset 3 + if (p_desc[0] >= 4 && p_desc[2] == MIDI_CS_ENDPOINT_GENERAL_2_0) { + uint8_t num_grp_trm_blk = p_desc[3]; + if (tu_edpt_dir(p_ep->bEndpointAddress) == TUSB_DIR_OUT) { + tx_cable_count = num_grp_trm_blk; + } else { + rx_cable_count = num_grp_trm_blk; + } + } } + break; } + + default: + break; } - if (tu_desc_type(p_desc) == TUSB_DESC_ENDPOINT) { - const tusb_desc_endpoint_t *p_ep = (const tusb_desc_endpoint_t *) p_desc; + if (!found_new_interface) { p_desc = tu_desc_next(p_desc); - - if (tu_desc_in_bounds(p_desc, desc_end) && tu_desc_type(p_desc) == TUSB_DESC_CS_ENDPOINT) { - const midi_desc_cs_endpoint_t *p_csep = (const midi_desc_cs_endpoint_t *) p_desc; - - if (tu_edpt_dir(p_ep->bEndpointAddress) == TUSB_DIR_OUT) { - tx_cable_count = p_csep->bNumEmbMIDIJack; - } else { - rx_cable_count = p_csep->bNumEmbMIDIJack; - } - } } - - p_desc = tu_desc_next(p_desc); } p_midi->rx_cable_count_alt1 = rx_cable_count; p_midi->tx_cable_count_alt1 = tx_cable_count; + return p_desc; } //--------------------------------------------------------------------+ @@ -327,33 +348,20 @@ uint16_t midih2_open(uint8_t rhport, uint8_t dev_addr, const tusb_desc_interface desc_itf->bInterfaceNumber, desc_itf->bAlternateSetting, dev_addr); // Dispatch to appropriate parser based on Alt Setting + const uint8_t *p_end = NULL; if (desc_itf->bAlternateSetting == 0) { - midih2_parse_descriptors_alt0(p_midi, desc_itf, desc_end); + p_end = midih2_parse_descriptors_alt0(p_midi, desc_itf, desc_end); } else if (desc_itf->bAlternateSetting == 1) { - midih2_parse_descriptors_alt1(p_midi, desc_itf, desc_end); + p_end = midih2_parse_descriptors_alt1(p_midi, desc_itf, desc_end); } - return max_len; + // Return number of bytes consumed (following midi_host.c pattern) + uint16_t const parsed_len = (p_end != NULL) ? (uint16_t)(p_end - desc_start) : 0; + return parsed_len; } -bool midih2_set_config(uint8_t dev_addr, uint8_t itf_num) { - uint8_t idx = 0; - for (idx = 0; idx < CFG_TUH_MIDI2; idx++) { - if (_midi2_host[idx].daddr == dev_addr && _midi2_host[idx].bInterfaceNumber == itf_num) { - break; - } - } - - if (idx >= CFG_TUH_MIDI2) { - // Not our interface (e.g. Audio Control) - pass through to next - usbh_driver_set_config_complete(dev_addr, itf_num); - return true; - } - - midih2_interface_t *p_midi = &_midi2_host[idx]; - - // Auto-select alt setting - midih2_auto_select_alt_setting(p_midi); +static void midih2_set_config_complete(midih2_interface_t *p_midi, uint8_t idx) { + uint8_t dev_addr = p_midi->daddr; // Invoke descriptor_cb tuh_midi2_descriptor_cb_t desc_cb = { @@ -374,7 +382,7 @@ bool midih2_set_config(uint8_t dev_addr, uint8_t itf_num) { // Invoke mount_cb tuh_midi2_mount_cb_t mount_cb = { - .daddr = p_midi->daddr, + .daddr = dev_addr, .bInterfaceNumber = p_midi->bInterfaceNumber, .protocol_version = p_midi->protocol_version, .alt_setting_active = p_midi->alt_setting_current, @@ -387,7 +395,56 @@ bool midih2_set_config(uint8_t dev_addr, uint8_t itf_num) { tu_edpt_stream_read_xfer(&p_midi->ep_stream.rx); // Signal USBH that configuration is complete - usbh_driver_set_config_complete(dev_addr, itf_num); + usbh_driver_set_config_complete(dev_addr, p_midi->bInterfaceNumber); +} + +static void midih2_set_interface_cb(tuh_xfer_t *xfer) { + uint8_t const dev_addr = xfer->daddr; + uint8_t const itf_num = (uint8_t) tu_le16toh(xfer->setup->wIndex); + + // Find our interface + for (uint8_t idx = 0; idx < CFG_TUH_MIDI2; idx++) { + if (_midi2_host[idx].daddr == dev_addr && _midi2_host[idx].bInterfaceNumber == itf_num) { + if (xfer->result == XFER_RESULT_SUCCESS) { + midih2_set_config_complete(&_midi2_host[idx], idx); + } else { + // SET_INTERFACE failed, fall back to alt 0 + TU_LOG_DRV("MIDI2 SET_INTERFACE failed, falling back to alt 0\r\n"); + _midi2_host[idx].alt_setting_current = 0; + midih2_set_config_complete(&_midi2_host[idx], idx); + } + return; + } + } +} + +bool midih2_set_config(uint8_t dev_addr, uint8_t itf_num) { + uint8_t idx = 0; + for (idx = 0; idx < CFG_TUH_MIDI2; idx++) { + if (_midi2_host[idx].daddr == dev_addr && _midi2_host[idx].bInterfaceNumber == itf_num) { + break; + } + } + + if (idx >= CFG_TUH_MIDI2) { + // Not our interface (e.g. Audio Control) - pass through to next + usbh_driver_set_config_complete(dev_addr, itf_num); + return true; + } + + midih2_interface_t *p_midi = &_midi2_host[idx]; + + // Auto-select alt setting + midih2_auto_select_alt_setting(p_midi); + + // If MIDI 2.0 detected, issue SET_INTERFACE to activate Alt Setting 1 + if (p_midi->alt_setting_current == 1) { + TU_LOG_DRV("MIDI2 requesting SET_INTERFACE alt 1 for itf %u\r\n", itf_num); + TU_ASSERT(tuh_interface_set(dev_addr, itf_num, 1, midih2_set_interface_cb, 0)); + } else { + // MIDI 1.0 only, complete immediately + midih2_set_config_complete(p_midi, idx); + } return true; } diff --git a/src/device/usbd.h b/src/device/usbd.h index af37eff56..a9f4c5f08 100644 --- a/src/device/usbd.h +++ b/src/device/usbd.h @@ -429,18 +429,20 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ //--------------------------------------------------------------------+ // Alt Setting 1: MS Interface + MS Header (bcdMSC=0x0200) +// wTotalLength covers MS Header + all CS Endpoint descriptors +#define TUD_MIDI2_DESC_ALT1_CS_LEN(_numgtbs) (7 + (4 + (_numgtbs)) * 2) #define TUD_MIDI2_DESC_ALT1_HEAD_LEN (9 + 7) -#define TUD_MIDI2_DESC_ALT1_HEAD(_itfnum, _stridx) \ +#define TUD_MIDI2_DESC_ALT1_HEAD(_itfnum, _stridx, _numgtbs) \ /* MIDI Streaming Interface, Alt Setting 1 */\ - 9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum) + 1), 1, 2, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_MIDI_STREAMING, AUDIO_FUNC_PROTOCOL_CODE_UNDEF, _stridx,\ - /* MS Header (MIDI 2.0) */\ - 7, TUSB_DESC_CS_INTERFACE, MIDI_CS_INTERFACE_HEADER, U16_TO_U8S_LE(0x0200), U16_TO_U8S_LE(7) + 9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum) + 1), 1, 2, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_MIDI_STREAMING, AUDIO_FUNC_PROTOCOL_CODE_UNDEF, 0,\ + /* MS Header (MIDI 2.0): wTotalLength = header + 2x CS Endpoint */\ + 7, TUSB_DESC_CS_INTERFACE, MIDI_CS_INTERFACE_HEADER, U16_TO_U8S_LE(0x0200), U16_TO_U8S_LE(TUD_MIDI2_DESC_ALT1_CS_LEN(_numgtbs)) -// Alt Setting 1: Standard USB Endpoint (7 bytes) + CS Endpoint (subtype 0x02) +// Alt Setting 1: Standard USB Endpoint (7 bytes) + CS Endpoint General 2.0 #define TUD_MIDI2_DESC_ALT1_EP_LEN(_numgtbs) (7 + 4 + (_numgtbs)) -#define TUD_MIDI2_DESC_ALT1_EP(_ep, _epsize, _numgtbs) \ +#define TUD_MIDI2_DESC_ALT1_EP(_ep, _epsize, _numgtbs, ...) \ 7, TUSB_DESC_ENDPOINT, _ep, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0, \ - (uint8_t)(4 + (_numgtbs)), TUSB_DESC_CS_ENDPOINT, MIDI_CS_ENDPOINT_GENERAL_2_0, _numgtbs + (uint8_t)(4 + (_numgtbs)), TUSB_DESC_CS_ENDPOINT, MIDI_CS_ENDPOINT_GENERAL_2_0, _numgtbs, ## __VA_ARGS__ // Total length: Alt 0 (MIDI 1.0) + Alt 1 (UMP) #define TUD_MIDI2_DESC_LEN (TUD_MIDI_DESC_LEN + TUD_MIDI2_DESC_ALT1_HEAD_LEN + TUD_MIDI2_DESC_ALT1_EP_LEN(1) * 2) @@ -455,11 +457,9 @@ bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_requ TUD_MIDI_DESC_EP(_epin, _epsize, 1),\ TUD_MIDI_JACKID_OUT_EMB(1),\ /* Alt Setting 1 (UMP) */\ - TUD_MIDI2_DESC_ALT1_HEAD(_itfnum, _stridx),\ - TUD_MIDI2_DESC_ALT1_EP(_epout, _epsize, 1),\ - 1, /* bAssoGrpTrmBlkID = 1 */\ - TUD_MIDI2_DESC_ALT1_EP(_epin, _epsize, 1),\ - 1 /* bAssoGrpTrmBlkID = 1 */ + TUD_MIDI2_DESC_ALT1_HEAD(_itfnum, _stridx, 1),\ + TUD_MIDI2_DESC_ALT1_EP(_epout, _epsize, 1, 1 /* bAssoGrpTrmBlkID */),\ + TUD_MIDI2_DESC_ALT1_EP(_epin, _epsize, 1, 1 /* bAssoGrpTrmBlkID */) //--------------------------------------------------------------------+ // Audio Descriptor Templates -- cgit v1.3.1 From 4baf1883c194c2c4b6fa30cc0c443ad6c83e0b19 Mon Sep 17 00:00:00 2001 From: HiFiPhile Date: Mon, 18 May 2026 23:07:49 +0200 Subject: midi2: convert to raw Tx FIFO for better segmentation handling, add count to packet api Signed-off-by: HiFiPhile --- docs/reference/class_drivers.rst | 4 +- src/class/midi/midi2_device.c | 276 +++++++++++++++++++++++---------------- src/class/midi/midi2_device.h | 14 +- 3 files changed, 176 insertions(+), 118 deletions(-) (limited to 'docs') diff --git a/docs/reference/class_drivers.rst b/docs/reference/class_drivers.rst index 3ac0d8d4e..4a101fabc 100644 --- a/docs/reference/class_drivers.rst +++ b/docs/reference/class_drivers.rst @@ -64,8 +64,8 @@ I/O Functions uint32_t tud_midi2_ump_read(uint32_t* words, uint32_t max_words); uint32_t tud_midi2_ump_write(const uint32_t* words, uint32_t count); - bool tud_midi2_packet_read(uint8_t packet[4]); - bool tud_midi2_packet_write(const uint8_t packet[4]); + uint32_t tud_midi2_packet_read(uint8_t packets[], uint32_t max_packets); + uint32_t tud_midi2_packet_write(const uint8_t packets[], uint32_t count); Callbacks ^^^^^^^^^ diff --git a/src/class/midi/midi2_device.c b/src/class/midi/midi2_device.c index c61884689..b14f439f8 100644 --- a/src/class/midi/midi2_device.c +++ b/src/class/midi/midi2_device.c @@ -100,6 +100,16 @@ enum { //--------------------------------------------------------------------+ // MACRO CONSTANT TYPEDEF //--------------------------------------------------------------------+ +typedef struct { + uint8_t ep_addr; + uint16_t mps; + tu_fifo_t ff; + +#if CFG_TUD_EDPT_DEDICATED_HWFIFO == 0 + uint8_t* ep_buf; +#endif +} midi2d_tx_t; + typedef struct { uint8_t rhport; uint8_t itf_num; @@ -109,7 +119,7 @@ typedef struct { /*------------- From this point, data is not cleared by bus reset -------------*/ struct { - tu_edpt_stream_t tx; + midi2d_tx_t tx; tu_edpt_stream_t rx; uint8_t rx_ff_buf[CFG_TUD_MIDI2_RX_BUFSIZE]; @@ -117,19 +127,6 @@ typedef struct { } ep_stream; } midi2d_interface_t; -TU_VERIFY_STATIC(CFG_TUD_MIDI2_NUM_GROUPS >= 1 && CFG_TUD_MIDI2_NUM_GROUPS <= 16, - "CFG_TUD_MIDI2_NUM_GROUPS must be 1..16"); -TU_VERIFY_STATIC(CFG_TUD_MIDI2_NUM_FUNCTION_BLOCKS >= 1 && CFG_TUD_MIDI2_NUM_FUNCTION_BLOCKS <= 32, - "CFG_TUD_MIDI2_NUM_FUNCTION_BLOCKS must be 1..32"); - -#define ITF_MEM_RESET_SIZE offsetof(midi2d_interface_t, ep_stream) - -static midi2d_interface_t _midi2d_itf[CFG_TUD_MIDI2]; - -static inline uint8_t _itf_idx(const midi2d_interface_t* p_midi) { - return (uint8_t)(p_midi - _midi2d_itf); -} - // Skip local EP buffer if dedicated hw FIFO is supported #if CFG_TUD_EDPT_DEDICATED_HWFIFO == 0 typedef struct { @@ -140,6 +137,15 @@ typedef struct { CFG_TUD_MEM_SECTION static midi2d_epbuf_t _midi2d_epbuf[CFG_TUD_MIDI2]; #endif +TU_VERIFY_STATIC(CFG_TUD_MIDI2_NUM_GROUPS >= 1 && CFG_TUD_MIDI2_NUM_GROUPS <= 16, + "CFG_TUD_MIDI2_NUM_GROUPS must be 1..16"); +TU_VERIFY_STATIC(CFG_TUD_MIDI2_NUM_FUNCTION_BLOCKS >= 1 && CFG_TUD_MIDI2_NUM_FUNCTION_BLOCKS <= 32, + "CFG_TUD_MIDI2_NUM_FUNCTION_BLOCKS must be 1..32"); + +#define ITF_MEM_RESET_SIZE offsetof(midi2d_interface_t, ep_stream) + +static midi2d_interface_t _midi2d_itf[CFG_TUD_MIDI2]; + // Default Group Terminal Block descriptor (USB-MIDI 2.0 spec, Table 5-5/5-6) static const uint8_t _default_gtb_desc[] = { // GTB Header (5 bytes) @@ -162,15 +168,112 @@ static const uint8_t _default_gtb_desc[] = { 0, 0 // wMaxOutputBandwidth: unknown }; +//--------------------------------------------------------------------+ +// Common utility functions +//--------------------------------------------------------------------+ + +static inline uint8_t _itf_idx(const midi2d_interface_t* p_midi) { + return (uint8_t)(p_midi - _midi2d_itf); +} + +static inline bool _tx_opened(const midi2d_interface_t* p_midi) { + return p_midi->ep_stream.tx.ep_addr != 0; +} + +static uint8_t _tx_byte_at(const tu_fifo_buffer_info_t* info, uint16_t offset) { + if (offset < info->linear.len) { + return info->linear.ptr[offset]; + } + + offset = (uint16_t) (offset - info->linear.len); + if (offset < info->wrapped.len) { + return info->wrapped.ptr[offset]; + } + + return 0; +} + +// Calculate the largest byte count that contains only whole UMP packets and +// fits in one USB transfer (<= mps). +static uint16_t _tx_nonseg_len_to_mps(midi2d_tx_t* tx) { + tu_fifo_buffer_info_t info; + tu_fifo_get_read_info(&tx->ff, &info); + + const uint16_t available = (uint16_t) (info.linear.len + info.wrapped.len); + uint16_t bytes = 0; + + while (bytes < tx->mps) { + if ((uint16_t) (available - bytes) < 4) break; + + uint8_t mt = (uint8_t)((_tx_byte_at(&info, (uint16_t) (bytes + 3)) >> 4) & 0x0F); + uint8_t pkt_words = midi2_ump_word_count(mt); + uint16_t pkt_bytes = (uint16_t) pkt_words * 4; + + if (pkt_bytes == 0) break; + if ((uint16_t) (available - bytes) < pkt_bytes) break; + if ((uint16_t) (bytes + pkt_bytes) > tx->mps) break; + + bytes = (uint16_t) (bytes + pkt_bytes); + } + + return bytes; +} + +// Start one IN transfer capped at mps, return number of bytes queued to the controller, or 0 if nothing was queued. +static uint16_t _tx_start_xfer(midi2d_interface_t* p_midi) { + midi2d_tx_t* tx = &p_midi->ep_stream.tx; + uint16_t ff_count = tu_fifo_count(&tx->ff); + + if (ff_count == 0) return 0; + + if (!usbd_edpt_claim(p_midi->rhport, tx->ep_addr)) return 0; + + uint16_t bytes; + if (p_midi->alt_setting == 1) { + bytes = _tx_nonseg_len_to_mps(tx); + } else { + bytes = tu_min16(tu_fifo_count(&tx->ff), tx->mps); + } + if (bytes == 0) { + usbd_edpt_release(p_midi->rhport, tx->ep_addr); + return 0; + } + +#if CFG_TUD_EDPT_DEDICATED_HWFIFO + TU_ASSERT(usbd_edpt_xfer_fifo(p_midi->rhport, tx->ep_addr, &tx->ff, bytes, false), 0); +#else + tu_fifo_read_n(&tx->ff, tx->ep_buf, bytes); + TU_ASSERT(usbd_edpt_xfer(p_midi->rhport, tx->ep_addr, tx->ep_buf, bytes, false), 0); +#endif + + return bytes; +} + +static uint32_t _tx_ump_write(midi2d_interface_t* p_midi, const uint32_t* words, uint32_t count) { + uint32_t written = 0; + while (written < count) { + uint8_t mt = (uint8_t)((words[written] >> 28) & 0x0F); + uint8_t pkt_words = midi2_ump_word_count(mt); + uint16_t pkt_bytes = (uint16_t) pkt_words * 4; + + if (written + pkt_words > count) break; + if (tu_fifo_remaining(&p_midi->ep_stream.tx.ff) < pkt_bytes) break; + + if (tu_fifo_write_n(&p_midi->ep_stream.tx.ff, &words[written], pkt_bytes) != pkt_bytes) break; + written += pkt_words; + } + + (void) _tx_start_xfer(p_midi); + return written; +} + //--------------------------------------------------------------------+ // Protocol Negotiation //--------------------------------------------------------------------+ static void _nego_send_ump(midi2d_interface_t* p_midi, const uint32_t* words, uint8_t count) { - tu_edpt_stream_t* ep_tx = &p_midi->ep_stream.tx; - if (!tu_edpt_stream_is_opened(ep_tx)) return; - if (tu_edpt_stream_write_available(ep_tx) < count * 4) return; - tu_edpt_stream_write(ep_tx, words, count * 4); - tu_edpt_stream_write_xfer(ep_tx); + if (!_tx_opened(p_midi)) return; + if (tu_fifo_remaining(&p_midi->ep_stream.tx.ff) < (uint32_t) count * 4) return; + (void) _tx_ump_write(p_midi, words, count); } static void _nego_send_endpoint_info(midi2d_interface_t* p_midi) { @@ -307,7 +410,7 @@ static void _nego_process_rx(midi2d_interface_t* p_midi) { bool tud_midi2_n_mounted(uint8_t itf) { TU_VERIFY(itf < CFG_TUD_MIDI2, false); midi2d_interface_t* p_midi = &_midi2d_itf[itf]; - return tu_edpt_stream_is_opened(&p_midi->ep_stream.tx) && + return _tx_opened(p_midi) && tu_edpt_stream_is_opened(&p_midi->ep_stream.rx); } @@ -346,10 +449,10 @@ uint32_t tud_midi2_n_ump_read(uint8_t itf, uint32_t* words, uint32_t max_words) return total_read; } -bool tud_midi2_n_packet_read(uint8_t itf, uint8_t packet[4]) { - TU_VERIFY(itf < CFG_TUD_MIDI2, false); +uint32_t tud_midi2_n_packet_read(uint8_t itf, uint8_t packets[], uint32_t max_packets) { + TU_VERIFY(itf < CFG_TUD_MIDI2 && packets != NULL && max_packets > 0, 0); midi2d_interface_t* p_midi = &_midi2d_itf[itf]; - return 4 == tu_edpt_stream_read(&p_midi->ep_stream.rx, packet, 4); + return tu_edpt_stream_read(&p_midi->ep_stream.rx, packets, max_packets * 4u) >> 2u; } //--------------------------------------------------------------------+ @@ -362,44 +465,31 @@ uint32_t tud_midi2_n_ump_write(uint8_t itf, const uint32_t* words, uint32_t coun // UMP API is only valid on Alt Setting 1 (USB-MIDI 2.0). // Alt 0 carries USB-MIDI 1.0 32-bit Event Packets, not UMP words. if (p_midi->alt_setting != 1) { return 0; } + TU_VERIFY(_tx_opened(p_midi), 0); - tu_edpt_stream_t* ep_tx = &p_midi->ep_stream.tx; - TU_VERIFY(tu_edpt_stream_is_opened(ep_tx), 0); + return _tx_ump_write(p_midi, words, count); +} + +uint32_t tud_midi2_n_packet_write(uint8_t itf, const uint8_t packets[], uint32_t count) { + TU_VERIFY(itf < CFG_TUD_MIDI2 && packets != NULL && count > 0, 0); + midi2d_interface_t* p_midi = &_midi2d_itf[itf]; + midi2d_tx_t* tx = &p_midi->ep_stream.tx; + + // Packet API is for Alt Setting 0 (USB-MIDI 1.0) event packets. + TU_VERIFY(p_midi->alt_setting == 0, 0); + TU_VERIFY(_tx_opened(p_midi), 0); uint32_t written = 0; while (written < count) { - uint8_t mt = (uint8_t)((words[written] >> 28) & 0x0F); - uint8_t pkt_words = midi2_ump_word_count(mt); - uint32_t pkt_bytes = (uint32_t)pkt_words * 4; + if (tu_fifo_remaining(&tx->ff) < 4) break; - if (written + pkt_words > count) break; - if (tu_edpt_stream_write_available(ep_tx) < pkt_bytes) break; - - // Flush whole packets already queued before adding one that would cross - // the wMaxPacketSize boundary. Prevents an UMP message from being split - // across two USB transfers, which would corrupt the host RX context. - uint16_t ff_count = tu_fifo_count(&ep_tx->ff); - if (ff_count > 0 && ff_count + pkt_bytes > ep_tx->mps) { - tu_edpt_stream_write_xfer(ep_tx); - } - - tu_edpt_stream_write(ep_tx, &words[written], pkt_bytes); - written += pkt_words; + if (tu_fifo_write_n(&tx->ff, packets + written * 4u, 4) != 4) break; + written++; } - (void) tu_edpt_stream_write_xfer(ep_tx); - return written; -} + (void) _tx_start_xfer(p_midi); -bool tud_midi2_n_packet_write(uint8_t itf, const uint8_t packet[4]) { - TU_VERIFY(itf < CFG_TUD_MIDI2, false); - midi2d_interface_t* p_midi = &_midi2d_itf[itf]; - tu_edpt_stream_t* ep_tx = &p_midi->ep_stream.tx; - TU_VERIFY(tu_edpt_stream_is_opened(ep_tx), false); - TU_VERIFY(tu_edpt_stream_write_available(ep_tx) >= 4, false); - TU_VERIFY(tu_edpt_stream_write(ep_tx, packet, 4) > 0, false); - (void) tu_edpt_stream_write_xfer(ep_tx); - return true; + return written; } //--------------------------------------------------------------------+ @@ -439,8 +529,14 @@ void midi2d_init(void) { tu_edpt_stream_init(&p_midi->ep_stream.rx, false, false, false, p_midi->ep_stream.rx_ff_buf, CFG_TUD_MIDI2_RX_BUFSIZE, epout_buf); - tu_edpt_stream_init(&p_midi->ep_stream.tx, false, true, false, - p_midi->ep_stream.tx_ff_buf, CFG_TUD_MIDI2_TX_BUFSIZE, epin_buf); + + midi2d_tx_t* tx = &p_midi->ep_stream.tx; + (void) tu_fifo_config(&tx->ff, p_midi->ep_stream.tx_ff_buf, CFG_TUD_MIDI2_TX_BUFSIZE, false); +#if CFG_TUD_EDPT_DEDICATED_HWFIFO == 0 + tx->ep_buf = epin_buf; +#else + (void) epin_buf; +#endif } } @@ -448,7 +544,6 @@ bool midi2d_deinit(void) { for (uint8_t i = 0; i < CFG_TUD_MIDI2; i++) { midi2d_interface_t* p_midi = &_midi2d_itf[i]; tu_edpt_stream_deinit(&p_midi->ep_stream.rx); - tu_edpt_stream_deinit(&p_midi->ep_stream.tx); } return true; } @@ -462,8 +557,8 @@ void midi2d_reset(uint8_t rhport) { tu_edpt_stream_clear(&p_midi->ep_stream.rx); tu_edpt_stream_close(&p_midi->ep_stream.rx); - tu_edpt_stream_clear(&p_midi->ep_stream.tx); - tu_edpt_stream_close(&p_midi->ep_stream.tx); + tu_fifo_clear(&p_midi->ep_stream.tx.ff); + p_midi->ep_stream.tx.ep_addr = 0; } } @@ -533,8 +628,9 @@ uint16_t midi2d_open(uint8_t rhport, const tusb_desc_interface_t* desc_itf, uint const uint8_t ep_addr = desc_ep->bEndpointAddress; if (tu_edpt_dir(ep_addr) == TUSB_DIR_IN) { - tu_edpt_stream_open(&p_midi->ep_stream.tx, rhport, desc_ep, CFG_TUD_MIDI2_TX_EPSIZE); - tu_edpt_stream_clear(&p_midi->ep_stream.tx); + p_midi->ep_stream.tx.ep_addr = ep_addr; + p_midi->ep_stream.tx.mps = tu_edpt_packet_size(desc_ep); + tu_fifo_clear(&p_midi->ep_stream.tx.ff); } else { tu_edpt_stream_open(&p_midi->ep_stream.rx, rhport, desc_ep, tu_edpt_packet_size(desc_ep)); tu_edpt_stream_clear(&p_midi->ep_stream.rx); @@ -588,7 +684,7 @@ bool midi2d_control_xfer_cb(uint8_t rhport, uint8_t stage, const tusb_control_re p_midi->alt_setting = alt; tu_edpt_stream_clear(&p_midi->ep_stream.rx); - tu_edpt_stream_clear(&p_midi->ep_stream.tx); + tu_fifo_clear(&p_midi->ep_stream.tx.ff); if (alt == 1) { p_midi->negotiated = false; @@ -635,53 +731,6 @@ bool midi2d_control_xfer_cb(uint8_t rhport, uint8_t stage, const tusb_control_re } } -// Drain whole UMP packets from the TX FIFO into the EP buffer, capped at -// wMaxPacketSize. Needed when CFG_TUD_MIDI2_TX_BUFSIZE > mps: the FIFO can -// then hold more bytes than fit in a single USB transfer, and a blind -// tu_edpt_stream_write_xfer would split a UMP across two transfers. -static void midi2d_flush_tx_boundary_aware(midi2d_interface_t* p_midi, uint32_t last_xferred) { - tu_edpt_stream_t* ep_tx = &p_midi->ep_stream.tx; - const uint16_t mps = ep_tx->mps; - const uint16_t ff_count = tu_fifo_count(&ep_tx->ff); - - if (ff_count == 0) { - (void) tu_edpt_stream_write_zlp_if_needed(ep_tx, last_xferred); - return; - } - if (ff_count <= mps) { - // Whole FIFO fits in one transfer; the stream API drain is safe. - (void) tu_edpt_stream_write_xfer(ep_tx); - return; - } - if (ep_tx->ep_buf == NULL) { - // HWFIFO mode: relies on CFG_TUD_MIDI2_TX_BUFSIZE <= mps for UMP integrity. - (void) tu_edpt_stream_write_xfer(ep_tx); - return; - } - - // ff_count > mps and a local EP buffer is available: drain only whole UMP - // packets up to mps to preserve packet boundaries on the USB wire. - uint8_t word_bytes[4]; - uint8_t* buf = ep_tx->ep_buf; - uint16_t bytes = 0; - while (bytes < mps) { - if (tu_fifo_count(&ep_tx->ff) < 4) break; - if (4 != tu_fifo_peek_n(&ep_tx->ff, word_bytes, 4)) break; - uint8_t mt = (uint8_t)((word_bytes[3] >> 4) & 0x0F); - uint8_t pkt_words = midi2_ump_word_count(mt); - uint16_t pkt_bytes = (uint16_t)(pkt_words * 4); - if (tu_fifo_count(&ep_tx->ff) < pkt_bytes) break; - if (bytes + pkt_bytes > mps) break; - tu_fifo_read_n(&ep_tx->ff, buf + bytes, pkt_bytes); - bytes = (uint16_t)(bytes + pkt_bytes); - } - if (bytes == 0) return; - if (!usbd_edpt_claim(p_midi->rhport, ep_tx->ep_addr)) return; - if (!usbd_edpt_xfer(p_midi->rhport, ep_tx->ep_addr, buf, bytes, false)) { - usbd_edpt_release(p_midi->rhport, ep_tx->ep_addr); - } -} - bool midi2d_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes) { (void) rhport; @@ -690,7 +739,7 @@ bool midi2d_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint3 midi2d_interface_t* p_midi = &_midi2d_itf[idx]; tu_edpt_stream_t* ep_rx = &p_midi->ep_stream.rx; - tu_edpt_stream_t* ep_tx = &p_midi->ep_stream.tx; + midi2d_tx_t* ep_tx = &p_midi->ep_stream.tx; if (ep_addr == ep_rx->ep_addr) { if (result == XFER_RESULT_SUCCESS) { @@ -702,7 +751,14 @@ bool midi2d_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint3 } tu_edpt_stream_read_xfer(ep_rx); } else if (ep_addr == ep_tx->ep_addr && result == XFER_RESULT_SUCCESS) { - midi2d_flush_tx_boundary_aware(p_midi, xferred_bytes); + uint16_t queued = _tx_start_xfer(p_midi); + // Send ZLP if no more data is queued but the last transfer was exactly mps + if (queued == 0 && tu_fifo_count(&ep_tx->ff) == 0 && xferred_bytes > 0 && + (0 == (xferred_bytes & (ep_tx->mps - 1)))) { + if (usbd_edpt_claim(rhport, ep_tx->ep_addr)) { + usbd_edpt_xfer(rhport, ep_tx->ep_addr, NULL, 0, false); + } + } } else { return false; } diff --git a/src/class/midi/midi2_device.h b/src/class/midi/midi2_device.h index 6c29b8ddf..e53535693 100644 --- a/src/class/midi/midi2_device.h +++ b/src/class/midi/midi2_device.h @@ -130,8 +130,8 @@ uint8_t tud_midi2_n_protocol(uint8_t itf); uint32_t tud_midi2_n_ump_read(uint8_t itf, uint32_t* words, uint32_t max_words); uint32_t tud_midi2_n_ump_write(uint8_t itf, const uint32_t* words, uint32_t count); -bool tud_midi2_n_packet_read(uint8_t itf, uint8_t packet[4]); -bool tud_midi2_n_packet_write(uint8_t itf, const uint8_t packet[4]); +uint32_t tud_midi2_n_packet_read(uint8_t itf, uint8_t packets[], uint32_t max_packets); +uint32_t tud_midi2_n_packet_write(uint8_t itf, const uint8_t packets[], uint32_t count); //--------------------------------------------------------------------+ // Application API (Single Interface) @@ -166,12 +166,14 @@ tud_midi2_ump_write(const uint32_t* words, uint32_t count) { return tud_midi2_n_ump_write(0, words, count); } -TU_ATTR_ALWAYS_INLINE static inline bool tud_midi2_packet_read(uint8_t packet[4]) { - return tud_midi2_n_packet_read(0, packet); +TU_ATTR_ALWAYS_INLINE static inline uint32_t +tud_midi2_packet_read(uint8_t packets[], uint32_t max_packets) { + return tud_midi2_n_packet_read(0, packets, max_packets); } -TU_ATTR_ALWAYS_INLINE static inline bool tud_midi2_packet_write(const uint8_t packet[4]) { - return tud_midi2_n_packet_write(0, packet); +TU_ATTR_ALWAYS_INLINE static inline uint32_t +tud_midi2_packet_write(const uint8_t packets[], uint32_t count) { + return tud_midi2_n_packet_write(0, packets, count); } //--------------------------------------------------------------------+ -- cgit v1.3.1