diff --git a/us144mkii.c b/us144mkii.c index a97ff06..67dcd59 100644 --- a/us144mkii.c +++ b/us144mkii.c @@ -71,6 +71,28 @@ void tascam_free_urbs(struct tascam_card *tascam) { } } + 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; + } + } + + 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; + } + } + kfree(tascam->capture_routing_buffer); tascam->capture_routing_buffer = NULL; kfree(tascam->capture_decode_dst_block); @@ -153,6 +175,41 @@ int tascam_alloc_urbs(struct tascam_card *tascam) { c_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; @@ -200,17 +257,106 @@ void tascam_stop_work_handler(struct work_struct *work) { * @card: Pointer to the ALSA sound card instance. * * This function is called when the sound card is being freed. It releases - * the reference to the USB device. + * 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 && tascam->dev) { - usb_put_dev(tascam->dev); - tascam->dev = NULL; + if (tascam) { + kfifo_free(&tascam->midi_in_fifo); + if (tascam->dev) { + usb_put_dev(tascam->dev); + tascam->dev = NULL; + } } } +/** + * 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); + + if (!tascam) + 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); + + 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); + int err; + + 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); + 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); + 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); + + 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. @@ -221,8 +367,8 @@ static void tascam_card_private_free(struct snd_card *card) { * - 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 and PCM device. - * - Allocating and initializing URBs for audio transfers. + * - 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. */ @@ -238,14 +384,13 @@ static int tascam_probe(struct usb_interface *intf, 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 */ + return 0; } if (dev_idx >= SNDRV_CARDS) { @@ -262,7 +407,6 @@ static int tascam_probe(struct usb_interface *intf, if (!handshake_buf) 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); @@ -277,7 +421,6 @@ static int tascam_probe(struct usb_interface *intf, return -ENODEV; } - /* Set alternate settings to enable audio/MIDI endpoints */ err = usb_set_interface(dev, 0, 1); if (err < 0) { dev_err(&dev->dev, "Failed to set alt setting 1 on interface 0: %d\n", err); @@ -304,27 +447,24 @@ static int tascam_probe(struct usb_interface *intf, tascam->iface0 = intf; 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_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); - 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)); - - err = tascam_init_pcm(tascam->pcm); - if (err < 0) - goto free_card; - - err = tascam_alloc_urbs(tascam); - if (err < 0) - goto free_card; + 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 (dev->descriptor.idProduct == USB_PID_TASCAM_US144) { @@ -338,6 +478,28 @@ static int tascam_probe(struct usb_interface *intf, 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)); + + err = tascam_init_pcm(tascam->pcm); + if (err < 0) + goto free_card; + + 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; + err = snd_card_register(card); if (err < 0) goto free_card; @@ -358,8 +520,8 @@ free_card: * @intf: The USB interface being disconnected. * * This function is called when the device is disconnected from the system. - * It cleans up all allocated resources by freeing the sound card, which in - * turn triggers freeing of URBs and other resources. + * 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); @@ -368,84 +530,27 @@ 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); + + 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); snd_card_free(tascam->card); dev_idx--; } } -/** - * 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 and kills all URBs. - * - * Return: 0 on success. - */ -static int tascam_suspend(struct usb_interface *intf, pm_message_t message) { - struct tascam_card *tascam = usb_get_intfdata(intf); - - if (!tascam) - return 0; - - snd_pcm_suspend_all(tascam->pcm); - - cancel_work_sync(&tascam->stop_work); - cancel_work_sync(&tascam->capture_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); - - 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); - int err; - - if (!tascam) - return 0; - - dev_info(&intf->dev, "resuming TASCAM US-144MKII\n"); - - /* 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); - 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); - 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); - - return 0; -} - 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)}, diff --git a/us144mkii.h b/us144mkii.h index 3457069..71a9ddc 100644 --- a/us144mkii.h +++ b/us144mkii.h @@ -4,13 +4,18 @@ #ifndef __US144MKII_H #define __US144MKII_H +#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 @@ -20,13 +25,15 @@ /* --- 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_D2H_VENDOR_DEV (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE) #define RT_H2D_VENDOR_DEV (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE) +#define RT_D2H_VENDOR_DEV (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE) enum uac_request { UAC_SET_CUR = 0x01, @@ -48,6 +55,8 @@ 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, @@ -70,6 +79,11 @@ enum tascam_register { #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 @@ -85,10 +99,6 @@ enum tascam_register { #define FRAMES_PER_DECODE_BLOCK 8 #define RAW_BYTES_PER_DECODE_BLOCK 512 -struct tascam_card; - -#include "us144mkii_pcm.h" - /** * struct us144mkii_frame_pattern_observer - State for dynamic feedback * patterns. @@ -117,6 +127,7 @@ struct us144mkii_frame_pattern_observer { * @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. @@ -142,14 +153,35 @@ struct us144mkii_frame_pattern_observer { * @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. @@ -164,6 +196,8 @@ struct us144mkii_frame_pattern_observer { * @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 { /* --- Core device pointers --- */ @@ -172,6 +206,7 @@ struct tascam_card { struct usb_interface *iface1; struct snd_card *card; struct snd_pcm *pcm; + struct snd_rawmidi *rmidi; /* --- PCM Substreams --- */ struct snd_pcm_substream *playback_substream; @@ -184,9 +219,13 @@ struct tascam_card { 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 --- */ spinlock_t lock; @@ -211,6 +250,18 @@ struct tascam_card { s32 *capture_decode_dst_block; s32 *capture_routing_buffer; + /* --- 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; + /* --- Feedback Sync State --- */ unsigned int feedback_accumulator_pattern[FEEDBACK_ACCUMULATOR_SIZE]; unsigned int feedback_pattern_out_idx; @@ -224,14 +275,23 @@ struct tascam_card { 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, and - * capture URBs, along with their transfer buffers and the capture + * 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); @@ -241,7 +301,7 @@ void tascam_free_urbs(struct tascam_card *tascam); * @tascam: the tascam_card instance * * This function allocates and initializes all URBs for playback, feedback, - * and capture, as well as the necessary buffers for data processing. + * capture, and MIDI, as well as the necessary buffers for data processing. * * Return: 0 on success, or a negative error code on failure. */ @@ -256,4 +316,51 @@ int tascam_alloc_urbs(struct tascam_card *tascam); */ 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_controls.c b/us144mkii_controls.c new file mode 100644 index 0000000..63215d0 --- /dev/null +++ b/us144mkii_controls.c @@ -0,0 +1,400 @@ +// 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); + + 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); + + if (ucontrol->value.enumerated.item[0] > 1) + return -EINVAL; + if (tascam->line_out_source == ucontrol->value.enumerated.item[0]) + return 0; + tascam->line_out_source = ucontrol->value.enumerated.item[0]; + return 1; +} + +/** + * 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 OUTPUTS 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); + + 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); + + if (ucontrol->value.enumerated.item[0] > 1) + return -EINVAL; + if (tascam->digital_out_source == ucontrol->value.enumerated.item[0]) + return 0; + tascam->digital_out_source = ucontrol->value.enumerated.item[0]; + return 1; +} + +/** + * 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 OUTPUTS 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); + + 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); + + if (ucontrol->value.enumerated.item[0] > 1) + return -EINVAL; + if (tascam->capture_12_source == ucontrol->value.enumerated.item[0]) + return 0; + tascam->capture_12_source = ucontrol->value.enumerated.item[0]; + return 1; +} + +/** + * 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 and ch2 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); + + 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); + + if (ucontrol->value.enumerated.item[0] > 1) + return -EINVAL; + if (tascam->capture_34_source == ucontrol->value.enumerated.item[0]) + return 0; + tascam->capture_34_source = ucontrol->value.enumerated.item[0]; + return 1; +} + +/** + * 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 and ch4 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); + int err; + u32 rate = 0; + + 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 new file mode 100644 index 0000000..2a278a8 --- /dev/null +++ b/us144mkii_midi.c @@ -0,0 +1,374 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (c) 2025 Šerif Rami + +#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) { + struct tascam_card *tascam = urb->context; + int ret; + + 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); + } + goto out; + } + + if (tascam && 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); + usb_put_urb(urb); + } +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) { + 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; + + if (up) { + if (atomic_xchg(&tascam->midi_in_active, 1) == 0) { + { + guard(spinlock_irqsave)(&tascam->midi_in_lock); + kfifo_reset(&tascam->midi_in_fifo); + } + + 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]); + } + } + } + } 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); + } + } +} + +/** + * 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) { + 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; + } + + { + 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)) + return; + + while (snd_rawmidi_transmit_peek(substream, (u8[]){0}, 1) == 1) { + int urb_index; + struct urb *urb; + u8 *buf; + int bytes_to_send; + + { + 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] = 0x00; + + 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); + { + 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; + break; + } + } + if (in_flight) + schedule_timeout_uninterruptible(1); + } + + cancel_work_sync(&tascam->midi_out_work); + usb_kill_anchored_urbs(&tascam->midi_out_anchor); +} + +/** + * 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) { + 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); + } +} + +/** + * 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, +}; + +int tascam_create_midi(struct tascam_card *tascam) { + int err; + + err = + snd_rawmidi_new(tascam->card, "US144MKII MIDI", 0, 1, 1, &tascam->rmidi); + if (err < 0) + return err; + + strscpy(tascam->rmidi->name, "US144MKII MIDI", sizeof(tascam->rmidi->name)); + tascam->rmidi->private_data = tascam; + + 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); + + tascam->rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT | + SNDRV_RAWMIDI_INFO_OUTPUT | + SNDRV_RAWMIDI_INFO_DUPLEX; + + INIT_WORK(&tascam->midi_in_work, tascam_midi_in_work_handler); + INIT_WORK(&tascam->midi_out_work, tascam_midi_out_work_handler); + + return 0; +} diff --git a/us144mkii_pcm.c b/us144mkii_pcm.c index d5fafba..8a7e1a6 100644 --- a/us144mkii_pcm.c +++ b/us144mkii_pcm.c @@ -54,18 +54,59 @@ const struct snd_pcm_hardware tascam_pcm_hw = { void process_playback_routing_us144mkii(struct tascam_card *tascam, const u8 *src_buffer, u8 *dst_buffer, size_t frames) { - /* This is a stub. Routing will be added in a later commit. */ - if (src_buffer != dst_buffer) - memcpy(dst_buffer, src_buffer, frames * BYTES_PER_FRAME); + 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) { - /* This is a stub. Routing will be added in a later commit. */ - memcpy(routed_block, decoded_block, - FRAMES_PER_DECODE_BLOCK * DECODED_CHANNELS_PER_FRAME * - DECODED_SAMPLE_SIZE); + 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) {