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us144mkii
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Revert "GUI fixes" 

This reverts commit 8b522452ed8bda17033d02620b72a406adb248ec. Driver logic caused capture regression.
This commit is contained in:
Šerif Rami 2025-08-06 13:21:38 +02:00
parent 81c133fb52
commit 8c047e6f7e
9 changed files with 1815 additions and 1681 deletions
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1
README.md
View File

@ -14,7 +14,6 @@ This driver is under active development.
### 📝 To-Do & Known Limitations
* Find Bugs, if possible improve performance/stablity
* *MIDI IN/OUT works only in active audio streaming(DAW ALSA/JACK or browser audio)
* Non MKII US-144 needs testing to see if the driver will work with it.
## Installation and Usage

146
us144mkii.c
View File

@ -16,8 +16,8 @@ MODULE_LICENSE("GPL");
* These parameters allow users to configure how the ALSA sound card
* for the TASCAM US-144MKII is instantiated.
*
* @param index: Array of integers specifying the ALSA card index for each
* device. Defaults to -1 (automatic).
* @param index: Array of integers specifying the ALSA card index for each device.
* Defaults to -1 (automatic).
* @param id: Array of strings specifying the ALSA card ID for each device.
* Defaults to "US144MKII".
* @param enable: Array of booleans to enable or disable each device.
@ -50,7 +50,8 @@ static int tascam_resume(struct usb_interface *intf);
* Return: The number of bytes written to the buffer.
*/
static ssize_t driver_version_show(struct device *dev,
struct device_attribute *attr, char *buf) {
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%s\n", DRIVER_VERSION);
}
static DEVICE_ATTR_RO(driver_version);
@ -63,13 +64,15 @@ static DEVICE_ATTR_RO(driver_version);
* capture, and MIDI URBs, along with their transfer buffers and the
* capture ring/decode buffers.
*/
void tascam_free_urbs(struct tascam_card *tascam) {
void tascam_free_urbs(struct tascam_card *tascam)
{
int i;
usb_kill_anchored_urbs(&tascam->playback_anchor);
for (i = 0; i < NUM_PLAYBACK_URBS; i++) {
if (tascam->playback_urbs[i]) {
usb_free_coherent(tascam->dev, tascam->playback_urb_alloc_size,
usb_free_coherent(
tascam->dev, tascam->playback_urb_alloc_size,
tascam->playback_urbs[i]->transfer_buffer,
tascam->playback_urbs[i]->transfer_dma);
usb_free_urb(tascam->playback_urbs[i]);
@ -80,7 +83,8 @@ void tascam_free_urbs(struct tascam_card *tascam) {
usb_kill_anchored_urbs(&tascam->feedback_anchor);
for (i = 0; i < NUM_FEEDBACK_URBS; i++) {
if (tascam->feedback_urbs[i]) {
usb_free_coherent(tascam->dev, tascam->feedback_urb_alloc_size,
usb_free_coherent(
tascam->dev, tascam->feedback_urb_alloc_size,
tascam->feedback_urbs[i]->transfer_buffer,
tascam->feedback_urbs[i]->transfer_dma);
usb_free_urb(tascam->feedback_urbs[i]);
@ -91,7 +95,8 @@ void tascam_free_urbs(struct tascam_card *tascam) {
usb_kill_anchored_urbs(&tascam->capture_anchor);
for (i = 0; i < NUM_CAPTURE_URBS; i++) {
if (tascam->capture_urbs[i]) {
usb_free_coherent(tascam->dev, tascam->capture_urb_alloc_size,
usb_free_coherent(
tascam->dev, tascam->capture_urb_alloc_size,
tascam->capture_urbs[i]->transfer_buffer,
tascam->capture_urbs[i]->transfer_dma);
usb_free_urb(tascam->capture_urbs[i]);
@ -102,7 +107,8 @@ 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,
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]);
@ -113,7 +119,8 @@ void tascam_free_urbs(struct tascam_card *tascam) {
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,
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]);
@ -142,22 +149,25 @@ void tascam_free_urbs(struct tascam_card *tascam) {
*
* Return: 0 on success, or a negative error code on failure.
*/
int tascam_alloc_urbs(struct tascam_card *tascam) {
int tascam_alloc_urbs(struct tascam_card *tascam)
{
int i;
size_t max_packet_size;
max_packet_size = ((96000 / 8000) + 2) * BYTES_PER_FRAME;
tascam->playback_urb_alloc_size = max_packet_size * PLAYBACK_URB_PACKETS;
tascam->playback_urb_alloc_size =
max_packet_size * PLAYBACK_URB_PACKETS;
for (i = 0; i < NUM_PLAYBACK_URBS; i++) {
struct urb *urb = usb_alloc_urb(PLAYBACK_URB_PACKETS, GFP_KERNEL);
struct urb *urb =
usb_alloc_urb(PLAYBACK_URB_PACKETS, GFP_KERNEL);
if (!urb)
goto error;
tascam->playback_urbs[i] = urb;
urb->transfer_buffer =
usb_alloc_coherent(tascam->dev, tascam->playback_urb_alloc_size,
urb->transfer_buffer = usb_alloc_coherent(
tascam->dev, tascam->playback_urb_alloc_size,
GFP_KERNEL, &urb->transfer_dma);
if (!urb->transfer_buffer)
goto error;
@ -170,23 +180,26 @@ int tascam_alloc_urbs(struct tascam_card *tascam) {
urb->complete = playback_urb_complete;
}
tascam->feedback_urb_alloc_size = FEEDBACK_PACKET_SIZE * MAX_FEEDBACK_PACKETS;
tascam->feedback_urb_alloc_size =
FEEDBACK_PACKET_SIZE * MAX_FEEDBACK_PACKETS;
for (i = 0; i < NUM_FEEDBACK_URBS; i++) {
struct urb *f_urb = usb_alloc_urb(MAX_FEEDBACK_PACKETS, GFP_KERNEL);
struct urb *f_urb =
usb_alloc_urb(MAX_FEEDBACK_PACKETS, GFP_KERNEL);
if (!f_urb)
goto error;
tascam->feedback_urbs[i] = f_urb;
f_urb->transfer_buffer =
usb_alloc_coherent(tascam->dev, tascam->feedback_urb_alloc_size,
f_urb->transfer_buffer = usb_alloc_coherent(
tascam->dev, tascam->feedback_urb_alloc_size,
GFP_KERNEL, &f_urb->transfer_dma);
if (!f_urb->transfer_buffer)
goto error;
f_urb->dev = tascam->dev;
f_urb->pipe = usb_rcvisocpipe(tascam->dev, EP_PLAYBACK_FEEDBACK);
f_urb->pipe =
usb_rcvisocpipe(tascam->dev, EP_PLAYBACK_FEEDBACK);
f_urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
f_urb->interval = 4;
f_urb->context = tascam;
@ -201,15 +214,16 @@ int tascam_alloc_urbs(struct tascam_card *tascam) {
goto error;
tascam->capture_urbs[i] = c_urb;
c_urb->transfer_buffer =
usb_alloc_coherent(tascam->dev, tascam->capture_urb_alloc_size,
GFP_KERNEL, &c_urb->transfer_dma);
c_urb->transfer_buffer = usb_alloc_coherent(
tascam->dev, tascam->capture_urb_alloc_size, GFP_KERNEL,
&c_urb->transfer_dma);
if (!c_urb->transfer_buffer)
goto error;
usb_fill_bulk_urb(c_urb, tascam->dev,
usb_rcvbulkpipe(tascam->dev, EP_AUDIO_IN),
c_urb->transfer_buffer, tascam->capture_urb_alloc_size,
c_urb->transfer_buffer,
tascam->capture_urb_alloc_size,
capture_urb_complete, tascam);
c_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
}
@ -221,8 +235,9 @@ int tascam_alloc_urbs(struct tascam_card *tascam) {
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);
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,
@ -238,18 +253,21 @@ int tascam_alloc_urbs(struct tascam_card *tascam) {
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);
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 */
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);
tascam->capture_ring_buffer =
kmalloc(CAPTURE_RING_BUFFER_SIZE, GFP_KERNEL);
if (!tascam->capture_ring_buffer)
goto error;
@ -285,7 +303,8 @@ error:
return -ENOMEM;
}
void tascam_stop_work_handler(struct work_struct *work) {
void tascam_stop_work_handler(struct work_struct *work)
{
struct tascam_card *tascam =
container_of(work, struct tascam_card, stop_work);
@ -297,15 +316,15 @@ void tascam_stop_work_handler(struct work_struct *work) {
}
/**
* tascam_card_private_free() - Frees private data associated with the sound
* card.
* tascam_card_private_free() - Frees private data associated with the sound card.
* @card: Pointer to the ALSA sound card instance.
*
* This function is called when the sound card is being freed. It releases
* resources allocated for the tascam_card structure, including the MIDI
* input FIFO and decrements the USB device reference count.
*/
static void tascam_card_private_free(struct snd_card *card) {
static void tascam_card_private_free(struct snd_card *card)
{
struct tascam_card *tascam = card->private_data;
if (tascam) {
@ -328,7 +347,8 @@ static void tascam_card_private_free(struct snd_card *card) {
*
* Return: 0 on success.
*/
static int tascam_suspend(struct usb_interface *intf, pm_message_t message) {
static int tascam_suspend(struct usb_interface *intf, pm_message_t message)
{
struct tascam_card *tascam = usb_get_intfdata(intf);
int err;
@ -371,7 +391,8 @@ static int tascam_suspend(struct usb_interface *intf, pm_message_t message) {
0, /* size */
1000); /* timeout */
if (err < 0)
dev_err(&intf->dev, "failed to send deep sleep command: %d\n", err);
dev_err(&intf->dev, "failed to send deep sleep command: %d\n",
err);
return 0;
}
@ -380,13 +401,14 @@ static int tascam_suspend(struct usb_interface *intf, pm_message_t message) {
* 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.
* 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) {
static int tascam_resume(struct usb_interface *intf)
{
struct tascam_card *tascam = usb_get_intfdata(intf);
int err;
@ -401,20 +423,23 @@ static int tascam_resume(struct usb_interface *intf) {
*/
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",
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",
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);
us144mkii_configure_device_for_rate(tascam,
tascam->current_rate);
return 0;
}
@ -435,7 +460,8 @@ static int tascam_resume(struct usb_interface *intf) {
* Return: 0 on success, or a negative error code on failure.
*/
static int tascam_probe(struct usb_interface *intf,
const struct usb_device_id *usb_id) {
const struct usb_device_id *usb_id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct snd_card *card;
struct tascam_card *tascam;
@ -443,7 +469,8 @@ static int tascam_probe(struct usb_interface *intf,
char *handshake_buf;
if (dev->speed != USB_SPEED_HIGH)
dev_info(&dev->dev,
dev_info(
&dev->dev,
"Device is connected to a USB 1.1 port, this is not supported.\n");
if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
@ -469,9 +496,10 @@ static int tascam_probe(struct usb_interface *intf,
if (!handshake_buf)
return -ENOMEM;
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);
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);
if (err < 0) {
dev_err(&dev->dev, "Handshake read failed with %d\n", err);
kfree(handshake_buf);
@ -480,7 +508,8 @@ static int tascam_probe(struct usb_interface *intf,
if (handshake_buf[0] != 0x12 && handshake_buf[0] != 0x16 &&
handshake_buf[0] != 0x30) {
dev_err(&dev->dev, "Unexpected handshake value: 0x%x\n", handshake_buf[0]);
dev_err(&dev->dev, "Unexpected handshake value: 0x%x\n",
handshake_buf[0]);
kfree(handshake_buf);
return -ENODEV;
}
@ -488,13 +517,17 @@ static int tascam_probe(struct usb_interface *intf,
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);
dev_err(&dev->dev,
"Failed to set alt setting 1 on interface 0: %d\n",
err);
return err;
}
err = usb_set_interface(dev, 1, 1);
if (err < 0) {
dev_err(&dev->dev, "Failed to set alt setting 1 on interface 1: %d\n", err);
dev_err(&dev->dev,
"Failed to set alt setting 1 on interface 1: %d\n",
err);
return err;
}
@ -528,9 +561,9 @@ static int tascam_probe(struct usb_interface *intf,
strscpy(card->driver, DRIVER_NAME, sizeof(card->driver));
if (dev->descriptor.idProduct == USB_PID_TASCAM_US144) {
strscpy(card->shortname, "TASCAM US-144", sizeof(card->shortname));
strscpy(card->shortname, "TASCAM US144", sizeof(card->shortname));
} else if (dev->descriptor.idProduct == USB_PID_TASCAM_US144MKII) {
strscpy(card->shortname, "TASCAM US-144MKII", sizeof(card->shortname));
strscpy(card->shortname, "TASCAM US144MKII", sizeof(card->shortname));
} else {
strscpy(card->shortname, "TASCAM Unknown", sizeof(card->shortname));
}
@ -540,7 +573,8 @@ static int tascam_probe(struct usb_interface *intf,
err = device_create_file(&dev->dev, &dev_attr_driver_version);
if (err < 0)
dev_warn(&dev->dev, "could not create driver_version attribute, err: %d\n",
dev_warn(&dev->dev,
"could not create driver_version attribute, err: %d\n",
err);
err = snd_pcm_new(card, "US144MKII PCM", 0, 1, 1, &tascam->pcm);
@ -587,7 +621,8 @@ free_card:
* It cleans up all allocated resources, including killing URBs, freeing
* the sound card, and releasing memory.
*/
static void tascam_disconnect(struct usb_interface *intf) {
static void tascam_disconnect(struct usb_interface *intf)
{
struct tascam_card *tascam = usb_get_intfdata(intf);
if (!tascam)
@ -611,7 +646,8 @@ static void tascam_disconnect(struct usb_interface *intf) {
static const struct usb_device_id tascam_usb_ids[] = {
{ USB_DEVICE(USB_VID_TASCAM, USB_PID_TASCAM_US144) },
{ USB_DEVICE(USB_VID_TASCAM, USB_PID_TASCAM_US144MKII) },
{/* Terminating entry */}};
{ /* Terminating entry */ }
};
MODULE_DEVICE_TABLE(usb, tascam_usb_ids);
static struct usb_driver tascam_alsa_driver = {

35
us144mkii.h
View File

@ -4,17 +4,17 @@
#ifndef __US144MKII_H
#define __US144MKII_H
#include <linux/kfifo.h>
#include <linux/usb.h>
#include <linux/workqueue.h>
#include <sound/control.h>
#include <linux/kfifo.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/rawmidi.h>
#include <sound/initval.h>
#include <sound/control.h>
#define DRIVER_NAME "us144mkii"
#define DRIVER_VERSION "1.7.5"
#define DRIVER_VERSION "1.7.4"
/* --- USB Device Identification --- */
#define USB_VID_TASCAM 0x0644
@ -152,23 +152,17 @@ enum tascam_register {
* @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).
* @digital_out_source: Source for Digital Outputs (0: Playback 1-2, 1: Playback 3-4).
* @capture_12_source: Source for Capture channels 1-2 (0: Analog In, 1: Digital In).
* @capture_34_source: Source for Capture channels 3-4 (0: Analog In, 1: Digital In).
*
* @feedback_accumulator_pattern: Stores the calculated frames per packet for
* feedback.
* @feedback_accumulator_pattern: Stores the calculated frames per packet for feedback.
* @feedback_pattern_out_idx: Read index for feedback_accumulator_pattern.
* @feedback_pattern_in_idx: Write index for feedback_accumulator_pattern.
* @feedback_synced: Flag indicating if feedback is synced.
* @feedback_consecutive_errors: Counter for consecutive feedback errors.
* @feedback_urb_skip_count: Number of feedback URBs to skip initially for
* stabilization.
* @feedback_patterns: Pointer to the current feedback patterns based on sample
* rate.
* @feedback_urb_skip_count: Number of feedback URBs to skip initially for stabilization.
* @feedback_patterns: Pointer to the current feedback patterns based on sample rate.
* @feedback_base_value: Base value for feedback pattern lookup.
* @feedback_max_value: Max value for feedback pattern lookup.
*
@ -283,9 +277,9 @@ int tascam_alloc_urbs(struct tascam_card *tascam);
* tascam_stop_work_handler() - Work handler to stop all active streams.
* @work: Pointer to the work_struct.
*
* This function is scheduled to stop all active URBs (playback, feedback,
* capture) and reset the active_urbs counter. It is used to gracefully stop
* streams from a workqueue context.
* This function is scheduled to stop all active URBs (playback, feedback, capture)
* and reset the active_urbs counter. It is used to gracefully stop streams
* from a workqueue context.
*/
void tascam_stop_work_handler(struct work_struct *work);
@ -324,8 +318,7 @@ int tascam_create_midi(struct tascam_card *tascam);
/* us144mkii_controls.c */
/**
* tascam_create_controls() - Creates and adds ALSA mixer controls for the
* device.
* 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

70
us144mkii_capture.c
View File

@ -12,7 +12,8 @@
*
* Return: 0 on success.
*/
static int tascam_capture_open(struct snd_pcm_substream *substream) {
static int tascam_capture_open(struct snd_pcm_substream *substream)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
substream->runtime->hw = tascam_pcm_hw;
@ -31,7 +32,8 @@ static int tascam_capture_open(struct snd_pcm_substream *substream) {
*
* Return: 0 on success.
*/
static int tascam_capture_close(struct snd_pcm_substream *substream) {
static int tascam_capture_close(struct snd_pcm_substream *substream)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
tascam->capture_substream = NULL;
@ -47,7 +49,8 @@ static int tascam_capture_close(struct snd_pcm_substream *substream) {
*
* Return: 0 on success.
*/
static int tascam_capture_prepare(struct snd_pcm_substream *substream) {
static int tascam_capture_prepare(struct snd_pcm_substream *substream)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
tascam->driver_capture_pos = 0;
@ -69,7 +72,8 @@ static int tascam_capture_prepare(struct snd_pcm_substream *substream) {
* Return: The current capture pointer position in frames.
*/
static snd_pcm_uframes_t
tascam_capture_pointer(struct snd_pcm_substream *substream) {
tascam_capture_pointer(struct snd_pcm_substream *substream)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
u64 pos;
@ -82,8 +86,10 @@ tascam_capture_pointer(struct snd_pcm_substream *substream) {
pos = tascam->capture_frames_processed;
spin_unlock_irqrestore(&tascam->lock, flags);
u64 remainder = do_div(pos, runtime->buffer_size);
return runtime ? remainder : 0;
}
/**
@ -113,7 +119,8 @@ const struct snd_pcm_ops tascam_capture_ops = {
* demultiplexes the bits from the raw block into 8 frames of 4-channel,
* 24-bit audio (stored in 32-bit containers).
*/
static void decode_tascam_capture_block(const u8 *src_block, s32 *dst_block) {
static void decode_tascam_capture_block(const u8 *src_block, s32 *dst_block)
{
int frame, bit;
memset(dst_block, 0,
@ -157,7 +164,8 @@ static void decode_tascam_capture_block(const u8 *src_block, s32 *dst_block) {
* copies the final audio data into the ALSA capture ring buffer. This offloads
* * the CPU-intensive decoding from the time-sensitive URB completion handlers.
*/
void tascam_capture_work_handler(struct work_struct *work) {
void tascam_capture_work_handler(struct work_struct *work)
{
struct tascam_card *tascam =
container_of(work, struct tascam_card, capture_work);
struct snd_pcm_substream *substream = tascam->capture_substream;
@ -184,19 +192,23 @@ void tascam_capture_work_handler(struct work_struct *work) {
spin_lock_irqsave(&tascam->lock, flags);
write_ptr = tascam->capture_ring_buffer_write_ptr;
read_ptr = tascam->capture_ring_buffer_read_ptr;
available_data = (write_ptr >= read_ptr)
? (write_ptr - read_ptr)
: (CAPTURE_RING_BUFFER_SIZE - read_ptr + write_ptr);
available_data = (write_ptr >= read_ptr) ?
(write_ptr - read_ptr) :
(CAPTURE_RING_BUFFER_SIZE - read_ptr +
write_ptr);
can_process = (available_data >= RAW_BYTES_PER_DECODE_BLOCK);
if (can_process) {
size_t i;
for (i = 0; i < RAW_BYTES_PER_DECODE_BLOCK; i++)
raw_block[i] = tascam->capture_ring_buffer[(read_ptr + i) %
raw_block[i] =
tascam->capture_ring_buffer
[(read_ptr + i) %
CAPTURE_RING_BUFFER_SIZE];
tascam->capture_ring_buffer_read_ptr =
(read_ptr + RAW_BYTES_PER_DECODE_BLOCK) % CAPTURE_RING_BUFFER_SIZE;
(read_ptr + RAW_BYTES_PER_DECODE_BLOCK) %
CAPTURE_RING_BUFFER_SIZE;
}
spin_unlock_irqrestore(&tascam->lock, flags);
@ -204,7 +216,8 @@ void tascam_capture_work_handler(struct work_struct *work) {
break;
decode_tascam_capture_block(raw_block, decoded_block);
process_capture_routing_us144mkii(tascam, decoded_block, routed_block);
process_capture_routing_us144mkii(tascam, decoded_block,
routed_block);
spin_lock_irqsave(&tascam->lock, flags);
if (atomic_read(&tascam->capture_active)) {
@ -213,19 +226,28 @@ void tascam_capture_work_handler(struct work_struct *work) {
for (f = 0; f < FRAMES_PER_DECODE_BLOCK; ++f) {
u8 *dst_frame_start =
runtime->dma_area +
frames_to_bytes(runtime, tascam->driver_capture_pos);
s32 *routed_frame_start = routed_block + (f * NUM_CHANNELS);
frames_to_bytes(
runtime,
tascam->driver_capture_pos);
s32 *routed_frame_start =
routed_block + (f * NUM_CHANNELS);
int c;
for (c = 0; c < NUM_CHANNELS; c++) {
u8 *dst_channel = dst_frame_start + (c * BYTES_PER_SAMPLE);
s32 *src_channel_s32 = routed_frame_start + c;
u8 *dst_channel =
dst_frame_start +
(c * BYTES_PER_SAMPLE);
s32 *src_channel_s32 =
routed_frame_start + c;
memcpy(dst_channel, ((char *)src_channel_s32) + 1, 3);
memcpy(dst_channel,
((char *)src_channel_s32) + 1,
3);
}
tascam->driver_capture_pos =
(tascam->driver_capture_pos + 1) % runtime->buffer_size;
(tascam->driver_capture_pos + 1) %
runtime->buffer_size;
}
}
spin_unlock_irqrestore(&tascam->lock, flags);
@ -240,7 +262,8 @@ void tascam_capture_work_handler(struct work_struct *work) {
* into an intermediate ring buffer and then schedules the workqueue to process
* it. It then resubmits the URB to receive more data.
*/
void capture_urb_complete(struct urb *urb) {
void capture_urb_complete(struct urb *urb)
{
struct tascam_card *tascam = urb->context;
int ret;
unsigned long flags;
@ -249,7 +272,8 @@ void capture_urb_complete(struct urb *urb) {
if (urb->status != -ENOENT && urb->status != -ECONNRESET &&
urb->status != -ESHUTDOWN && urb->status != -ENODEV &&
urb->status != -EPROTO)
dev_err_ratelimited(tascam->card->dev, "Capture URB failed: %d\n",
dev_err_ratelimited(tascam->card->dev,
"Capture URB failed: %d\n",
urb->status);
goto out;
}
@ -263,7 +287,8 @@ void capture_urb_complete(struct urb *urb) {
spin_lock_irqsave(&tascam->lock, flags);
write_ptr = tascam->capture_ring_buffer_write_ptr;
for (i = 0; i < urb->actual_length; i++) {
tascam->capture_ring_buffer[write_ptr] = ((u8 *)urb->transfer_buffer)[i];
tascam->capture_ring_buffer[write_ptr] =
((u8 *)urb->transfer_buffer)[i];
write_ptr = (write_ptr + 1) % CAPTURE_RING_BUFFER_SIZE;
}
tascam->capture_ring_buffer_write_ptr = write_ptr;
@ -277,7 +302,8 @@ void capture_urb_complete(struct urb *urb) {
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
dev_err_ratelimited(tascam->card->dev,
"Failed to resubmit capture URB: %d\n", ret);
"Failed to resubmit capture URB: %d\n",
ret);
usb_unanchor_urb(urb);
usb_put_urb(urb);
}

132
us144mkii_controls.c
View File

@ -21,19 +21,18 @@ static const char *const playback_source_texts[] = {"Playback 1-2",
static const char *const capture_source_texts[] = { "Analog In", "Digital In" };
/**
* tascam_playback_source_info() - ALSA control info callback for playback
* source.
* 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).
* 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) {
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = 1;
uinfo->value.enumerated.items = 2;
@ -57,7 +56,8 @@ static int tascam_playback_source_info(struct snd_kcontrol *kcontrol,
* Return: 0 on success.
*/
static int tascam_line_out_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol) {
struct snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
ucontrol->value.enumerated.item[0] = tascam->line_out_source;
@ -76,7 +76,8 @@ static int tascam_line_out_get(struct snd_kcontrol *kcontrol,
* 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 snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
if (ucontrol->value.enumerated.item[0] > 1)
@ -93,8 +94,7 @@ static int tascam_line_out_put(struct snd_kcontrol *kcontrol,
* 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.
* 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,
@ -105,8 +105,7 @@ static const struct snd_kcontrol_new tascam_line_out_control = {
};
/**
* tascam_digital_out_get() - ALSA control get callback for Digital Outputs
* Source.
* 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.
*
@ -117,7 +116,8 @@ static const struct snd_kcontrol_new tascam_line_out_control = {
* Return: 0 on success.
*/
static int tascam_digital_out_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol) {
struct snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
ucontrol->value.enumerated.item[0] = tascam->digital_out_source;
@ -125,8 +125,7 @@ static int tascam_digital_out_get(struct snd_kcontrol *kcontrol,
}
/**
* tascam_digital_out_put() - ALSA control put callback for Digital Outputs
* Source.
* 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.
*
@ -137,7 +136,8 @@ static int tascam_digital_out_get(struct snd_kcontrol *kcontrol,
* 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 snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
if (ucontrol->value.enumerated.item[0] > 1)
@ -149,14 +149,12 @@ static int tascam_digital_out_put(struct snd_kcontrol *kcontrol,
}
/**
* tascam_digital_out_control - ALSA kcontrol definition for Digital Outputs
* Source.
* 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.
* 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,
@ -172,13 +170,13 @@ static const struct snd_kcontrol_new tascam_digital_out_control = {
* @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).
* 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) {
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
uinfo->count = 1;
uinfo->value.enumerated.items = 2;
@ -191,19 +189,19 @@ static int tascam_capture_source_info(struct snd_kcontrol *kcontrol,
}
/**
* tascam_capture_12_get() - ALSA control get callback for Capture channels 1
* and 2 Source.
* 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.
* 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 snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
ucontrol->value.enumerated.item[0] = tascam->capture_12_source;
@ -211,19 +209,19 @@ static int tascam_capture_12_get(struct snd_kcontrol *kcontrol,
}
/**
* tascam_capture_12_put() - ALSA control put callback for Capture channels 1
* and 2 Source.
* 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
* 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 snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
if (ucontrol->value.enumerated.item[0] > 1)
@ -235,14 +233,12 @@ static int tascam_capture_12_put(struct snd_kcontrol *kcontrol,
}
/**
* tascam_capture_12_control - ALSA kcontrol definition for Capture channels 1
* and 2 Source.
* 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.
* 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,
@ -253,19 +249,19 @@ static const struct snd_kcontrol_new tascam_capture_12_control = {
};
/**
* tascam_capture_34_get() - ALSA control get callback for Capture channels 3
* and 4 Source.
* 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.
* 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 snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
ucontrol->value.enumerated.item[0] = tascam->capture_34_source;
@ -273,19 +269,19 @@ static int tascam_capture_34_get(struct snd_kcontrol *kcontrol,
}
/**
* tascam_capture_34_put() - ALSA control put callback for Capture channels 3
* and 4 Source.
* 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
* 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 snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
if (ucontrol->value.enumerated.item[0] > 1)
@ -297,14 +293,12 @@ static int tascam_capture_34_put(struct snd_kcontrol *kcontrol,
}
/**
* tascam_capture_34_control - ALSA kcontrol definition for Capture channels 3
* and 4 Source.
* 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.
* 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,
@ -325,7 +319,8 @@ static const struct snd_kcontrol_new tascam_capture_34_control = {
* Return: 0 on success.
*/
static int tascam_samplerate_info(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_info *uinfo) {
struct snd_ctl_elem_info *uinfo)
{
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
uinfo->count = 1;
uinfo->value.integer.min = 0;
@ -340,13 +335,13 @@ static int tascam_samplerate_info(struct snd_kcontrol *kcontrol,
*
* 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.
* 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 snd_ctl_elem_value *ucontrol)
{
struct tascam_card *tascam =
(struct tascam_card *)snd_kcontrol_chip(kcontrol);
u8 *buf;
@ -363,8 +358,9 @@ static int tascam_samplerate_get(struct snd_kcontrol *kcontrol,
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);
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);
@ -389,8 +385,7 @@ static const struct snd_kcontrol_new tascam_samplerate_control = {
};
/**
* tascam_create_controls() - Creates and adds ALSA mixer controls for the
* device.
* 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
@ -399,11 +394,12 @@ static const struct snd_kcontrol_new tascam_samplerate_control = {
*
* Return: 0 on success, or a negative error code on failure.
*/
int tascam_create_controls(struct tascam_card *tascam) {
int tascam_create_controls(struct tascam_card *tascam)
{
int err;
err =
snd_ctl_add(tascam->card, snd_ctl_new1(&tascam_line_out_control, tascam));
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,

100
us144mkii_midi.c
View File

@ -11,7 +11,8 @@
* 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) {
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[MIDI_IN_BUF_SIZE];
@ -22,8 +23,8 @@ static void tascam_midi_in_work_handler(struct work_struct *work) {
return;
while (!kfifo_is_empty(&tascam->midi_in_fifo)) {
len = kfifo_out_spinlocked(&tascam->midi_in_fifo, buf, sizeof(buf),
&tascam->midi_in_lock);
len = kfifo_out_spinlocked(&tascam->midi_in_fifo, buf,
sizeof(buf), &tascam->midi_in_lock);
if (len == 0)
continue;
@ -37,11 +38,13 @@ static void tascam_midi_in_work_handler(struct work_struct *work) {
continue;
/* The last byte is often a terminator (0x00, 0xFF). Ignore it. */
if (i == (len - 1) && (buf[i] == 0x00 || buf[i] == 0xff))
if (i == (len - 1) &&
(buf[i] == 0x00 || buf[i] == 0xff))
continue;
/* Submit valid MIDI bytes one by one */
snd_rawmidi_receive(tascam->midi_in_substream, &buf[i], 1);
snd_rawmidi_receive(tascam->midi_in_substream, &buf[i],
1);
}
}
}
@ -54,14 +57,16 @@ static void tascam_midi_in_work_handler(struct work_struct *work) {
* 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) {
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",
dev_err_ratelimited(tascam->card->dev,
"MIDI IN URB failed: status %d\n",
urb->status);
goto out;
}
@ -77,8 +82,8 @@ void tascam_midi_in_urb_complete(struct 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);
dev_err(tascam->card->dev,
"Failed to resubmit MIDI IN URB: error %d\n", ret);
usb_unanchor_urb(urb);
usb_put_urb(urb);
}
@ -95,7 +100,8 @@ out:
*
* Return: 0 on success.
*/
static int tascam_midi_in_open(struct snd_rawmidi_substream *substream) {
static int tascam_midi_in_open(struct snd_rawmidi_substream *substream)
{
struct tascam_card *tascam = substream->rmidi->private_data;
tascam->midi_in_substream = substream;
@ -108,7 +114,8 @@ static int tascam_midi_in_open(struct snd_rawmidi_substream *substream) {
*
* Return: 0 on success.
*/
static int tascam_midi_in_close(struct snd_rawmidi_substream *substream) {
static int tascam_midi_in_close(struct snd_rawmidi_substream *substream)
{
return 0;
}
@ -117,13 +124,14 @@ static int tascam_midi_in_close(struct snd_rawmidi_substream *substream) {
* @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
* 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) {
int up)
{
struct tascam_card *tascam = substream->rmidi->private_data;
int i, err;
unsigned long flags;
@ -136,12 +144,16 @@ static void tascam_midi_in_trigger(struct snd_rawmidi_substream *substream,
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);
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]);
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]);
}
}
@ -157,8 +169,8 @@ static void tascam_midi_in_trigger(struct snd_rawmidi_substream *substream,
/**
* 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.
* 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,
@ -175,7 +187,8 @@ static const struct snd_rawmidi_ops tascam_midi_in_ops = {
* 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) {
void tascam_midi_out_urb_complete(struct urb *urb)
{
struct tascam_card *tascam = urb->context;
unsigned long flags;
int i, urb_index = -1;
@ -183,7 +196,8 @@ void tascam_midi_out_urb_complete(struct urb *urb) {
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",
dev_err_ratelimited(tascam->card->dev,
"MIDI OUT URB failed: %d\n",
urb->status);
}
@ -198,7 +212,8 @@ void tascam_midi_out_urb_complete(struct urb *urb) {
}
if (urb_index < 0) {
dev_err_ratelimited(tascam->card->dev, "Unknown MIDI OUT URB completed!\n");
dev_err_ratelimited(tascam->card->dev,
"Unknown MIDI OUT URB completed!\n");
goto out;
}
@ -222,7 +237,8 @@ out:
* 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) {
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;
@ -273,8 +289,10 @@ static void tascam_midi_out_work_handler(struct work_struct *work) {
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);
dev_err_ratelimited(
tascam->card->dev,
"Failed to submit MIDI OUT URB %d\n",
urb_index);
spin_lock_irqsave(&tascam->midi_out_lock, flags);
clear_bit(urb_index, &tascam->midi_out_urbs_in_flight);
spin_unlock_irqrestore(&tascam->midi_out_lock, flags);
@ -294,7 +312,8 @@ static void tascam_midi_out_work_handler(struct work_struct *work) {
*
* Return: 0 on success.
*/
static int tascam_midi_out_open(struct snd_rawmidi_substream *substream) {
static int tascam_midi_out_open(struct snd_rawmidi_substream *substream)
{
struct tascam_card *tascam = substream->rmidi->private_data;
tascam->midi_out_substream = substream;
@ -309,7 +328,8 @@ static int tascam_midi_out_open(struct snd_rawmidi_substream *substream) {
*
* Return: 0 on success.
*/
static int tascam_midi_out_close(struct snd_rawmidi_substream *substream) {
static int tascam_midi_out_close(struct snd_rawmidi_substream *substream)
{
return 0;
}
@ -320,7 +340,8 @@ static int tascam_midi_out_close(struct snd_rawmidi_substream *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) {
static void tascam_midi_out_drain(struct snd_rawmidi_substream *substream)
{
struct tascam_card *tascam = substream->rmidi->private_data;
cancel_work_sync(&tascam->midi_out_work);
@ -336,7 +357,8 @@ static void tascam_midi_out_drain(struct snd_rawmidi_substream *substream) {
* 'up' parameter.
*/
static void tascam_midi_out_trigger(struct snd_rawmidi_substream *substream,
int up) {
int up)
{
struct tascam_card *tascam = substream->rmidi->private_data;
if (up) {
@ -350,8 +372,8 @@ static void tascam_midi_out_trigger(struct snd_rawmidi_substream *substream,
/**
* 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.
* 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,
@ -366,15 +388,17 @@ static const struct snd_rawmidi_ops tascam_midi_out_ops = {
*
* Return: 0 on success, or a negative error code on failure.
*/
int tascam_create_midi(struct tascam_card *tascam) {
int tascam_create_midi(struct tascam_card *tascam)
{
int err;
err =
snd_rawmidi_new(tascam->card, "US144MKII MIDI", 0, 1, 1, &tascam->rmidi);
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));
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,

121
us144mkii_pcm.c
View File

@ -25,13 +25,15 @@ static const unsigned int patterns_96khz[5][8] = {
{ 12, 12, 12, 12, 12, 12, 12, 12 },
{ 12, 12, 12, 12, 12, 12, 12, 12 },
{ 12, 12, 13, 12, 12, 12, 12, 12 },
{13, 12, 12, 13, 12, 12, 13, 12}};
{ 13, 12, 12, 13, 12, 12, 13, 12 }
};
static const unsigned int patterns_88khz[5][8] = {
{ 10, 11, 11, 11, 11, 11, 11, 11 },
{ 11, 11, 11, 11, 11, 11, 11, 11 },
{ 11, 11, 11, 11, 11, 11, 11, 11 },
{ 11, 11, 12, 11, 11, 11, 11, 11 },
{12, 11, 11, 12, 11, 11, 12, 11}};
{ 12, 11, 11, 12, 11, 11, 12, 11 }
};
static const unsigned int patterns_44khz[5][8] = { { 5, 5, 5, 5, 5, 5, 5, 6 },
{ 5, 5, 5, 6, 5, 5, 5, 6 },
{ 5, 5, 6, 5, 6, 5, 5, 6 },
@ -65,7 +67,8 @@ 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) {
size_t frames)
{
size_t f;
const u8 *src_12, *src_34;
u8 *dst_line, *dst_digital;
@ -98,7 +101,8 @@ void process_playback_routing_us144mkii(struct tascam_card *tascam,
*/
void process_capture_routing_us144mkii(struct tascam_card *tascam,
const s32 *decoded_block,
s32 *routed_block) {
s32 *routed_block)
{
int f;
const s32 *src_frame;
s32 *dst_frame;
@ -137,7 +141,8 @@ void process_capture_routing_us144mkii(struct tascam_card *tascam,
*
* Return: 0 on success, or a negative error code on failure.
*/
int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate) {
int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate)
{
struct usb_device *dev = tascam->dev;
u8 *rate_payload_buf;
u16 rate_vendor_wValue;
@ -167,7 +172,8 @@ int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate) {
rate_vendor_wValue = REG_ADDR_RATE_96000;
break;
default:
dev_err(&dev->dev, "Unsupported sample rate %d for configuration\n", rate);
dev_err(&dev->dev,
"Unsupported sample rate %d for configuration\n", rate);
return -EINVAL;
}
@ -177,49 +183,58 @@ int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate) {
dev_info(&dev->dev, "Configuring device for %d Hz\n", rate);
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_MODE_CONTROL,
RT_H2D_VENDOR_DEV, MODE_VAL_CONFIG, 0x0000, NULL, 0,
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
VENDOR_REQ_MODE_CONTROL, RT_H2D_VENDOR_DEV,
MODE_VAL_CONFIG, 0x0000, NULL, 0,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL, EP_AUDIO_IN,
rate_payload_buf, 3, USB_CTRL_TIMEOUT_MS);
RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL,
EP_AUDIO_IN, rate_payload_buf, 3,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL,
EP_AUDIO_OUT, rate_payload_buf, 3, USB_CTRL_TIMEOUT_MS);
EP_AUDIO_OUT, rate_payload_buf, 3,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE,
RT_H2D_VENDOR_DEV, REG_ADDR_UNKNOWN_0D, REG_VAL_ENABLE,
NULL, 0, USB_CTRL_TIMEOUT_MS);
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV,
REG_ADDR_UNKNOWN_0D, REG_VAL_ENABLE, NULL, 0,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE,
RT_H2D_VENDOR_DEV, REG_ADDR_UNKNOWN_0E, REG_VAL_ENABLE,
NULL, 0, USB_CTRL_TIMEOUT_MS);
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV,
REG_ADDR_UNKNOWN_0E, REG_VAL_ENABLE, NULL, 0,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE,
RT_H2D_VENDOR_DEV, REG_ADDR_UNKNOWN_0F, REG_VAL_ENABLE,
NULL, 0, USB_CTRL_TIMEOUT_MS);
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV,
REG_ADDR_UNKNOWN_0F, REG_VAL_ENABLE, NULL, 0,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE,
RT_H2D_VENDOR_DEV, rate_vendor_wValue, REG_VAL_ENABLE,
NULL, 0, USB_CTRL_TIMEOUT_MS);
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV,
rate_vendor_wValue, REG_VAL_ENABLE, NULL, 0,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE,
RT_H2D_VENDOR_DEV, REG_ADDR_UNKNOWN_11, REG_VAL_ENABLE,
NULL, 0, USB_CTRL_TIMEOUT_MS);
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV,
REG_ADDR_UNKNOWN_11, REG_VAL_ENABLE, NULL, 0,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_MODE_CONTROL,
RT_H2D_VENDOR_DEV, MODE_VAL_STREAM_START, 0x0000, NULL,
0, USB_CTRL_TIMEOUT_MS);
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
VENDOR_REQ_MODE_CONTROL, RT_H2D_VENDOR_DEV,
MODE_VAL_STREAM_START, 0x0000, NULL, 0,
USB_CTRL_TIMEOUT_MS);
if (err < 0)
goto fail;
@ -227,8 +242,9 @@ int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate) {
return 0;
fail:
dev_err(&dev->dev, "Device configuration failed at rate %d with error %d\n",
rate, err);
dev_err(&dev->dev,
"Device configuration failed at rate %d with error %d\n", rate,
err);
kfree(rate_payload_buf);
return err;
}
@ -246,7 +262,8 @@ fail:
* Return: 0 on success, or a negative error code on failure.
*/
int tascam_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params) {
struct snd_pcm_hw_params *params)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
int err;
unsigned int rate = params_rate(params);
@ -302,15 +319,15 @@ int tascam_pcm_hw_params(struct snd_pcm_substream *substream,
*
* Return: 0 on success.
*/
int tascam_pcm_hw_free(struct snd_pcm_substream *substream) {
int tascam_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
/**
* tascam_pcm_trigger() - Triggers the start or stop of PCM streams.
* @substream: The ALSA PCM substream.
* @cmd: The trigger command (e.g., SNDRV_PCM_TRIGGER_START,
* SNDRV_PCM_TRIGGER_STOP).
* @cmd: The trigger command (e.g., SNDRV_PCM_TRIGGER_START, SNDRV_PCM_TRIGGER_STOP).
*
* This function handles starting and stopping of playback and capture streams
* by submitting or killing the associated URBs. It ensures that both streams
@ -318,7 +335,8 @@ int tascam_pcm_hw_free(struct snd_pcm_substream *substream) {
*
* Return: 0 on success, or a negative error code on failure.
*/
int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd) {
int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
unsigned long flags;
int err = 0;
@ -353,14 +371,17 @@ int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd) {
if (do_start) {
if (atomic_read(&tascam->active_urbs) > 0) {
dev_WARN(tascam->card->dev, "Cannot start, URBs still active.\n");
dev_WARN(tascam->card->dev,
"Cannot start, URBs still active.\n");
return -EAGAIN;
}
for (i = 0; i < NUM_FEEDBACK_URBS; i++) {
usb_get_urb(tascam->feedback_urbs[i]);
usb_anchor_urb(tascam->feedback_urbs[i], &tascam->feedback_anchor);
err = usb_submit_urb(tascam->feedback_urbs[i], GFP_ATOMIC);
usb_anchor_urb(tascam->feedback_urbs[i],
&tascam->feedback_anchor);
err = usb_submit_urb(tascam->feedback_urbs[i],
GFP_ATOMIC);
if (err < 0) {
usb_unanchor_urb(tascam->feedback_urbs[i]);
usb_put_urb(tascam->feedback_urbs[i]);
@ -370,8 +391,10 @@ int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd) {
}
for (i = 0; i < NUM_PLAYBACK_URBS; i++) {
usb_get_urb(tascam->playback_urbs[i]);
usb_anchor_urb(tascam->playback_urbs[i], &tascam->playback_anchor);
err = usb_submit_urb(tascam->playback_urbs[i], GFP_ATOMIC);
usb_anchor_urb(tascam->playback_urbs[i],
&tascam->playback_anchor);
err = usb_submit_urb(tascam->playback_urbs[i],
GFP_ATOMIC);
if (err < 0) {
usb_unanchor_urb(tascam->playback_urbs[i]);
usb_put_urb(tascam->playback_urbs[i]);
@ -381,8 +404,10 @@ int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd) {
}
for (i = 0; i < NUM_CAPTURE_URBS; i++) {
usb_get_urb(tascam->capture_urbs[i]);
usb_anchor_urb(tascam->capture_urbs[i], &tascam->capture_anchor);
err = usb_submit_urb(tascam->capture_urbs[i], GFP_ATOMIC);
usb_anchor_urb(tascam->capture_urbs[i],
&tascam->capture_anchor);
err = usb_submit_urb(tascam->capture_urbs[i],
GFP_ATOMIC);
if (err < 0) {
usb_unanchor_urb(tascam->capture_urbs[i]);
usb_put_urb(tascam->capture_urbs[i]);
@ -393,8 +418,8 @@ int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd) {
return 0;
start_rollback:
dev_err(tascam->card->dev, "Failed to submit URBs to start stream: %d\n",
err);
dev_err(tascam->card->dev,
"Failed to submit URBs to start stream: %d\n", err);
do_stop = true;
}
@ -414,13 +439,15 @@ int tascam_pcm_trigger(struct snd_pcm_substream *substream, int cmd) {
*
* Return: 0 on success.
*/
int tascam_init_pcm(struct snd_pcm *pcm) {
int tascam_init_pcm(struct snd_pcm *pcm)
{
struct tascam_card *tascam = pcm->private_data;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &tascam_playback_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &tascam_capture_ops);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
tascam->dev->dev.parent, 64 * 1024,
tascam->dev->dev.parent,
64 * 1024,
tascam_pcm_hw.buffer_bytes_max);
INIT_WORK(&tascam->capture_work, tascam_capture_work_handler);

3
us144mkii_pcm.h
View File

@ -138,8 +138,7 @@ int tascam_pcm_hw_free(struct snd_pcm_substream *substream);
/**
* tascam_pcm_trigger() - Triggers the start or stop of PCM streams.
* @substream: The ALSA PCM substream.
* @cmd: The trigger command (e.g., SNDRV_PCM_TRIGGER_START,
* SNDRV_PCM_TRIGGER_STOP).
* @cmd: The trigger command (e.g., SNDRV_PCM_TRIGGER_START, SNDRV_PCM_TRIGGER_STOP).
*
* This function handles starting and stopping of playback and capture streams
* by submitting or killing the associated URBs. It ensures that both streams

120
us144mkii_playback.c
View File

@ -12,7 +12,8 @@
*
* Return: 0 on success.
*/
static int tascam_playback_open(struct snd_pcm_substream *substream) {
static int tascam_playback_open(struct snd_pcm_substream *substream)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
substream->runtime->hw = tascam_pcm_hw;
@ -31,7 +32,8 @@ static int tascam_playback_open(struct snd_pcm_substream *substream) {
*
* Return: 0 on success.
*/
static int tascam_playback_close(struct snd_pcm_substream *substream) {
static int tascam_playback_close(struct snd_pcm_substream *substream)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
tascam->playback_substream = NULL;
@ -49,7 +51,8 @@ static int tascam_playback_close(struct snd_pcm_substream *substream) {
*
* Return: 0 on success.
*/
static int tascam_playback_prepare(struct snd_pcm_substream *substream) {
static int tascam_playback_prepare(struct snd_pcm_substream *substream)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int i, u;
@ -68,7 +71,8 @@ static int tascam_playback_prepare(struct snd_pcm_substream *substream) {
nominal_frames_per_packet = runtime->rate / 8000;
for (i = 0; i < FEEDBACK_ACCUMULATOR_SIZE; i++)
tascam->feedback_accumulator_pattern[i] = nominal_frames_per_packet;
tascam->feedback_accumulator_pattern[i] =
nominal_frames_per_packet;
feedback_packets = 1;
@ -77,9 +81,11 @@ static int tascam_playback_prepare(struct snd_pcm_substream *substream) {
int j;
f_urb->number_of_packets = feedback_packets;
f_urb->transfer_buffer_length = feedback_packets * FEEDBACK_PACKET_SIZE;
f_urb->transfer_buffer_length =
feedback_packets * FEEDBACK_PACKET_SIZE;
for (j = 0; j < feedback_packets; j++) {
f_urb->iso_frame_desc[j].offset = j * FEEDBACK_PACKET_SIZE;
f_urb->iso_frame_desc[j].offset =
j * FEEDBACK_PACKET_SIZE;
f_urb->iso_frame_desc[j].length = FEEDBACK_PACKET_SIZE;
}
}
@ -90,12 +96,15 @@ static int tascam_playback_prepare(struct snd_pcm_substream *substream) {
for (u = 0; u < NUM_PLAYBACK_URBS; u++) {
struct urb *urb = tascam->playback_urbs[u];
memset(urb->transfer_buffer, 0, tascam->playback_urb_alloc_size);
memset(urb->transfer_buffer, 0,
tascam->playback_urb_alloc_size);
urb->transfer_buffer_length = total_bytes_in_urb;
urb->number_of_packets = PLAYBACK_URB_PACKETS;
for (i = 0; i < PLAYBACK_URB_PACKETS; i++) {
urb->iso_frame_desc[i].offset = i * nominal_bytes_per_packet;
urb->iso_frame_desc[i].length = nominal_bytes_per_packet;
urb->iso_frame_desc[i].offset =
i * nominal_bytes_per_packet;
urb->iso_frame_desc[i].length =
nominal_bytes_per_packet;
}
}
@ -112,7 +121,8 @@ static int tascam_playback_prepare(struct snd_pcm_substream *substream) {
* Return: The current playback pointer position in frames.
*/
static snd_pcm_uframes_t
tascam_playback_pointer(struct snd_pcm_substream *substream) {
tascam_playback_pointer(struct snd_pcm_substream *substream)
{
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
u64 pos;
@ -156,7 +166,8 @@ const struct snd_pcm_ops tascam_playback_ops = {
* copies the audio data from the ALSA ring buffer (applying routing), and
* resubmits the URB.
*/
void playback_urb_complete(struct urb *urb) {
void playback_urb_complete(struct urb *urb)
{
struct tascam_card *tascam = urb->context;
struct snd_pcm_substream *substream;
struct snd_pcm_runtime *runtime;
@ -170,7 +181,8 @@ void playback_urb_complete(struct urb *urb) {
if (urb->status) {
if (urb->status != -ENOENT && urb->status != -ECONNRESET &&
urb->status != -ESHUTDOWN && urb->status != -ENODEV)
dev_err_ratelimited(tascam->card->dev, "Playback URB failed: %d\n",
dev_err_ratelimited(tascam->card->dev,
"Playback URB failed: %d\n",
urb->status);
goto out;
}
@ -190,10 +202,11 @@ void playback_urb_complete(struct urb *urb) {
if (tascam->feedback_synced) {
frames_for_packet =
tascam
->feedback_accumulator_pattern[tascam->feedback_pattern_out_idx];
tascam->feedback_accumulator_pattern
[tascam->feedback_pattern_out_idx];
tascam->feedback_pattern_out_idx =
(tascam->feedback_pattern_out_idx + 1) % FEEDBACK_ACCUMULATOR_SIZE;
(tascam->feedback_pattern_out_idx + 1) %
FEEDBACK_ACCUMULATOR_SIZE;
} else {
frames_for_packet = runtime->rate / 8000;
}
@ -213,14 +226,16 @@ void playback_urb_complete(struct urb *urb) {
spin_unlock_irqrestore(&tascam->lock, flags);
if (total_bytes_for_urb > 0) {
src_buf = runtime->dma_area + frames_to_bytes(runtime, offset_frames);
src_buf = runtime->dma_area +
frames_to_bytes(runtime, offset_frames);
dst_buf = tascam->playback_routing_buffer;
/* Handle ring buffer wrap-around */
if (offset_frames + frames_to_copy > runtime->buffer_size) {
size_t first_chunk_bytes =
frames_to_bytes(runtime, runtime->buffer_size - offset_frames);
size_t second_chunk_bytes = total_bytes_for_urb - first_chunk_bytes;
size_t first_chunk_bytes = frames_to_bytes(
runtime, runtime->buffer_size - offset_frames);
size_t second_chunk_bytes =
total_bytes_for_urb - first_chunk_bytes;
memcpy(dst_buf, src_buf, first_chunk_bytes);
memcpy(dst_buf + first_chunk_bytes, runtime->dma_area,
@ -241,7 +256,8 @@ void playback_urb_complete(struct urb *urb) {
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
dev_err_ratelimited(tascam->card->dev,
"Failed to resubmit playback URB: %d\n", ret);
"Failed to resubmit playback URB: %d\n",
ret);
usb_unanchor_urb(urb);
usb_put_urb(urb);
}
@ -260,7 +276,8 @@ out:
* streams in sync. It then calls snd_pcm_period_elapsed if necessary and
* resubmits itself.
*/
void feedback_urb_complete(struct urb *urb) {
void feedback_urb_complete(struct urb *urb)
{
struct tascam_card *tascam = urb->context;
struct snd_pcm_substream *playback_ss, *capture_ss;
struct snd_pcm_runtime *playback_rt, *capture_rt;
@ -274,7 +291,8 @@ void feedback_urb_complete(struct urb *urb) {
if (urb->status) {
if (urb->status != -ENOENT && urb->status != -ECONNRESET &&
urb->status != -ESHUTDOWN && urb->status != -ENODEV)
dev_err_ratelimited(tascam->card->dev, "Feedback URB failed: %d\n",
dev_err_ratelimited(tascam->card->dev,
"Feedback URB failed: %d\n",
urb->status);
goto out;
}
@ -305,22 +323,25 @@ void feedback_urb_complete(struct urb *urb) {
urb->iso_frame_desc[p].actual_length >= 1);
if (packet_ok)
feedback_value =
*((u8 *)urb->transfer_buffer + urb->iso_frame_desc[p].offset);
feedback_value = *((u8 *)urb->transfer_buffer +
urb->iso_frame_desc[p].offset);
if (packet_ok && feedback_value >= tascam->feedback_base_value &&
if (packet_ok &&
feedback_value >= tascam->feedback_base_value &&
feedback_value <= tascam->feedback_max_value) {
pattern =
tascam
->feedback_patterns[feedback_value - tascam->feedback_base_value];
pattern = tascam->feedback_patterns
[feedback_value -
tascam->feedback_base_value];
tascam->feedback_consecutive_errors = 0;
int i;
for (i = 0; i < 8; i++) {
unsigned int in_idx =
(tascam->feedback_pattern_in_idx + i) % FEEDBACK_ACCUMULATOR_SIZE;
(tascam->feedback_pattern_in_idx + i) %
FEEDBACK_ACCUMULATOR_SIZE;
tascam->feedback_accumulator_pattern[in_idx] = pattern[i];
tascam->feedback_accumulator_pattern[in_idx] =
pattern[i];
total_frames_in_urb += pattern[i];
}
} else {
@ -334,36 +355,46 @@ void feedback_urb_complete(struct urb *urb) {
dev_err(tascam->card->dev,
"Fatal: Feedback sync lost. Stopping stream.\n");
if (playback_ss)
snd_pcm_stop(playback_ss, SNDRV_PCM_STATE_XRUN);
snd_pcm_stop(
playback_ss,
SNDRV_PCM_STATE_XRUN);
if (capture_ss)
snd_pcm_stop(capture_ss, SNDRV_PCM_STATE_XRUN);
snd_pcm_stop(
capture_ss,
SNDRV_PCM_STATE_XRUN);
tascam->feedback_synced = false;
goto unlock_and_continue;
}
}
for (i = 0; i < 8; i++) {
unsigned int in_idx =
(tascam->feedback_pattern_in_idx + i) % FEEDBACK_ACCUMULATOR_SIZE;
(tascam->feedback_pattern_in_idx + i) %
FEEDBACK_ACCUMULATOR_SIZE;
tascam->feedback_accumulator_pattern[in_idx] = nominal_frames;
tascam->feedback_accumulator_pattern[in_idx] =
nominal_frames;
total_frames_in_urb += nominal_frames;
}
}
tascam->feedback_pattern_in_idx =
(tascam->feedback_pattern_in_idx + 8) % FEEDBACK_ACCUMULATOR_SIZE;
(tascam->feedback_pattern_in_idx + 8) %
FEEDBACK_ACCUMULATOR_SIZE;
}
new_in_idx = tascam->feedback_pattern_in_idx;
if (!tascam->feedback_synced) {
unsigned int out_idx = tascam->feedback_pattern_out_idx;
bool is_ahead = (new_in_idx - out_idx) % FEEDBACK_ACCUMULATOR_SIZE <
bool is_ahead =
(new_in_idx - out_idx) % FEEDBACK_ACCUMULATOR_SIZE <
(FEEDBACK_ACCUMULATOR_SIZE / 2);
bool was_behind = (old_in_idx - out_idx) % FEEDBACK_ACCUMULATOR_SIZE >=
bool was_behind =
(old_in_idx - out_idx) % FEEDBACK_ACCUMULATOR_SIZE >=
(FEEDBACK_ACCUMULATOR_SIZE / 2);
if (is_ahead && was_behind) {
dev_dbg(tascam->card->dev, "Sync Acquired! (in: %u, out: %u)\n",
dev_dbg(tascam->card->dev,
"Sync Acquired! (in: %u, out: %u)\n",
new_in_idx, out_idx);
tascam->feedback_synced = true;
tascam->feedback_consecutive_errors = 0;
@ -377,8 +408,8 @@ void feedback_urb_complete(struct urb *urb) {
}
if (playback_rt->period_size > 0) {
u64 current_period =
div_u64(tascam->playback_frames_consumed, playback_rt->period_size);
u64 current_period = div_u64(tascam->playback_frames_consumed,
playback_rt->period_size);
if (current_period > tascam->last_period_pos) {
tascam->last_period_pos = current_period;
@ -389,10 +420,12 @@ void feedback_urb_complete(struct urb *urb) {
if (atomic_read(&tascam->capture_active) && capture_rt &&
capture_rt->period_size > 0) {
u64 current_capture_period =
div_u64(tascam->capture_frames_processed, capture_rt->period_size);
div_u64(tascam->capture_frames_processed,
capture_rt->period_size);
if (current_capture_period > tascam->last_capture_period_pos) {
tascam->last_capture_period_pos = current_capture_period;
tascam->last_capture_period_pos =
current_capture_period;
capture_period_elapsed = true;
}
}
@ -411,7 +444,8 @@ unlock_and_continue:
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret < 0) {
dev_err_ratelimited(tascam->card->dev,
"Failed to resubmit feedback URB: %d\n", ret);
"Failed to resubmit feedback URB: %d\n",
ret);
usb_unanchor_urb(urb);
usb_put_urb(urb);
}