driver refactor into proper modular structure
This commit is contained in:
serifpersia
parent
ac0175e10d
commit
e522aadb53
12
Makefile
12
Makefile
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@ -1,10 +1,8 @@
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obj-m += us144mkii.o
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obj-m += snd-usb-us144mkii.o
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snd-usb-us144mkii-y := us144mkii.o pcm.o playback.o capture.o controls.o midi.o
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KDIR := /lib/modules/$(shell uname -r)/build
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PWD := $(shell pwd)
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default:
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$(MAKE) -C $(KDIR) M=$(PWD) modules
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all:
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make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
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clean:
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$(MAKE) -C $(KDIR) M=$(PWD) clean
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make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
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18
README.md
18
README.md
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@ -49,7 +49,7 @@ The standard kernel includes a driver that will conflict with our custom module.
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1. **Create a blacklist file.** This tells the system *not* to load the `snd-usb-us122l` module.
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```bash
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echo "blacklist snd_usb_us122l" | sudo tee /etc/modprobe.d/blacklist-us144mkii.conf
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echo "blacklist snd_usb_us122l" | sudo tee /etc/modprobe.d/blacklist-us122l.conf
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```
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2. **Rebuild your initramfs.** This is a critical step that ensures the blacklist is applied at the very start of the boot process, before the stock driver has a chance to load. Run the command corresponding to your distribution:
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@ -80,7 +80,7 @@ The standard kernel includes a driver that will conflict with our custom module.
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> ```
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> ATTR{idVendor}=="0644", ATTR{idProduct}=="8007", ATTR{authorized}="0"
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> ```
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> After saving, run `sudo udevadm control --reload` and reboot. Note that with this rule in place, you will likely need to load the `us144mkii` driver manually with `sudo insmod us144mkii.ko` each time. The `modprobe` method is preferred for automatic loading.
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> After saving, run `sudo udevadm control --reload` and reboot. Note that with this rule in place, you will likely need to load the `us144mkii` driver manually with `sudo insmod snd-usb-us144mkii.ko` each time. The `modprobe` method is preferred for automatic loading.
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### Step 3: Compile and Load the Driver
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@ -95,7 +95,7 @@ This process will build the module from source and load it for your current sess
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3. Load the compiled module into the kernel:
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```bash
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sudo insmod us144mkii.ko
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sudo insmod snd-usb-us144mkii.ko
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```
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4. Connect your TASCAM US-144MKII. Verify that the driver loaded and the audio card is recognized by the system:
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@ -111,17 +111,13 @@ This process will build the module from source and load it for your current sess
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### Step 4: Install for Automatic Loading on Boot
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To make the driver load automatically every time you start your computer, follow these steps after you have successfully compiled it in Step 3.
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1. **Tell the system to load the module on boot.**
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1. **Copy the compiled module to the kernel's extra modules directory.** This makes it available to system tools.
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```bash
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echo "us144mkii" | sudo tee /etc/modules-load.d/us144mkii.conf
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sudo mkdir -p /lib/modules/$(uname -r)/extra/us144mkii
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sudo cp snd-usb-us144mkii.ko /lib/modules/$(uname -r)/extra/us144mkii
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```
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2. **Copy the compiled module to the kernel's extra modules directory.** This makes it available to system tools.
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```bash
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sudo cp us144mkii.ko /lib/modules/$(uname -r)/extra/
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```
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3. **Update module dependencies.** This command rebuilds the map of modules so the kernel knows about our new driver.
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2. **Update module dependencies.** This command rebuilds the map of modules so the kernel knows about our new driver.
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```bash
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sudo depmod -a
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```
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@ -0,0 +1,212 @@
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// SPDX-License-Identifier: GPL-2.0-only
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#include "us144mkii.h"
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#include "capture.h"
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/**
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* process_capture_routing_us144mkii() - Apply capture routing matrix
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* @tascam: The driver instance.
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* @decoded_block: Buffer containing 4 channels of S32LE decoded audio.
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* @routed_block: Buffer to be filled for ALSA.
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*/
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void process_capture_routing_us144mkii(struct tascam_card *tascam,
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const s32 *decoded_block,
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s32 *routed_block)
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{
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int f;
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const s32 *src_frame;
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s32 *dst_frame;
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for (f = 0; f < FRAMES_PER_DECODE_BLOCK; f++) {
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src_frame = decoded_block + (f * DECODED_CHANNELS_PER_FRAME);
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dst_frame = routed_block + (f * DECODED_CHANNELS_PER_FRAME);
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/* ch1 and ch2 Source */
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if (tascam->capture_12_source == 0) { /* analog inputs */
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dst_frame[0] = src_frame[0]; /* Analog L */
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dst_frame[1] = src_frame[1]; /* Analog R */
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} else { /* digital inputs */
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dst_frame[0] = src_frame[2]; /* Digital L */
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dst_frame[1] = src_frame[3]; /* Digital R */
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}
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/* ch3 and ch4 Source */
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if (tascam->capture_34_source == 0) { /* analog inputs */
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dst_frame[2] = src_frame[0]; /* Analog L (Duplicate) */
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dst_frame[3] = src_frame[1]; /* Analog R (Duplicate) */
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} else { /* digital inputs */
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dst_frame[2] = src_frame[2]; /* Digital L */
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dst_frame[3] = src_frame[3]; /* Digital R */
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}
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}
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}
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/**
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* decode_tascam_capture_block() - Decodes a raw 512-byte block from the device.
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* @src_block: Pointer to the 512-byte raw source block.
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* @dst_block: Pointer to the destination buffer for decoded audio frames.
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*
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* The device sends audio data in a complex, multiplexed format. This function
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* demultiplexes the bits from the raw block into 8 frames of 4-channel,
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* 24-bit audio (stored in 32-bit containers).
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*/
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void decode_tascam_capture_block(const u8 *src_block, s32 *dst_block)
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{
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int frame, bit;
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memset(dst_block, 0, FRAMES_PER_DECODE_BLOCK * DECODED_CHANNELS_PER_FRAME * DECODED_SAMPLE_SIZE);
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for (frame = 0; frame < FRAMES_PER_DECODE_BLOCK; ++frame) {
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const u8 *p_src_frame_base = src_block + frame * 64;
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s32 *p_dst_frame = dst_block + frame * 4;
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s32 ch[4] = {0};
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for (bit = 0; bit < 24; ++bit) {
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u8 byte1 = p_src_frame_base[bit];
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u8 byte2 = p_src_frame_base[bit + 32];
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ch[0] = (ch[0] << 1) | (byte1 & 1);
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ch[2] = (ch[2] << 1) | ((byte1 >> 1) & 1);
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ch[1] = (ch[1] << 1) | (byte2 & 1);
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ch[3] = (ch[3] << 1) | ((byte2 >> 1) & 1);
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}
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/*
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* The result is a 24-bit sample. Shift left by 8 to align it to
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* the most significant bits of a 32-bit integer (S32_LE format).
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*/
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p_dst_frame[0] = ch[0] << 8;
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p_dst_frame[1] = ch[1] << 8;
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p_dst_frame[2] = ch[2] << 8;
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p_dst_frame[3] = ch[3] << 8;
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}
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}
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/**
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* tascam_capture_work_handler() - Deferred work for processing capture data.
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* @work: the work_struct instance
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*
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* This function runs in a kernel thread context, not an IRQ context. It reads
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* raw data from the capture ring buffer, decodes it, applies routing, and
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* copies the final audio data into the ALSA capture ring buffer. This offloads
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* the CPU-intensive decoding from the time-sensitive URB completion handlers.
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*/
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void tascam_capture_work_handler(struct work_struct *work)
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{
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struct tascam_card *tascam = container_of(work, struct tascam_card, capture_work);
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struct snd_pcm_substream *substream = tascam->capture_substream;
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struct snd_pcm_runtime *runtime;
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unsigned long flags;
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u8 *raw_block = tascam->capture_decode_raw_block;
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s32 *decoded_block = tascam->capture_decode_dst_block;
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s32 *routed_block = tascam->capture_routing_buffer;
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if (!substream || !substream->runtime)
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return;
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runtime = substream->runtime;
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if (!raw_block || !decoded_block || !routed_block) {
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dev_err(tascam->card->dev, "Capture decode/routing buffers not allocated!\n");
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return;
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}
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while (atomic_read(&tascam->capture_active)) {
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size_t write_ptr, read_ptr, available_data;
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bool can_process;
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spin_lock_irqsave(&tascam->lock, flags);
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write_ptr = tascam->capture_ring_buffer_write_ptr;
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read_ptr = tascam->capture_ring_buffer_read_ptr;
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available_data = (write_ptr >= read_ptr) ? (write_ptr - read_ptr) : (CAPTURE_RING_BUFFER_SIZE - read_ptr + write_ptr);
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can_process = (available_data >= RAW_BYTES_PER_DECODE_BLOCK);
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if (can_process) {
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size_t i;
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for (i = 0; i < RAW_BYTES_PER_DECODE_BLOCK; i++)
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raw_block[i] = tascam->capture_ring_buffer[(read_ptr + i) % CAPTURE_RING_BUFFER_SIZE];
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tascam->capture_ring_buffer_read_ptr = (read_ptr + RAW_BYTES_PER_DECODE_BLOCK) % CAPTURE_RING_BUFFER_SIZE;
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}
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spin_unlock_irqrestore(&tascam->lock, flags);
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if (!can_process)
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break;
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decode_tascam_capture_block(raw_block, decoded_block);
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process_capture_routing_us144mkii(tascam, decoded_block, routed_block);
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spin_lock_irqsave(&tascam->lock, flags);
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if (atomic_read(&tascam->capture_active)) {
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int f;
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for (f = 0; f < FRAMES_PER_DECODE_BLOCK; ++f) {
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u8 *dst_frame_start = runtime->dma_area + frames_to_bytes(runtime, tascam->driver_capture_pos);
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s32 *routed_frame_start = routed_block + (f * NUM_CHANNELS);
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int c;
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for (c = 0; c < NUM_CHANNELS; c++) {
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u8 *dst_channel = dst_frame_start + (c * BYTES_PER_SAMPLE);
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s32 *src_channel_s32 = routed_frame_start + c;
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memcpy(dst_channel, ((char *)src_channel_s32) + 1, 3);
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}
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tascam->driver_capture_pos = (tascam->driver_capture_pos + 1) % runtime->buffer_size;
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}
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}
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spin_unlock_irqrestore(&tascam->lock, flags);
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}
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}
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/**
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* capture_urb_complete() - Completion handler for capture bulk URBs.
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* @urb: the completed URB
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*
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* This function runs in interrupt context. It copies the received raw data
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* into an intermediate ring buffer and then schedules the workqueue to process
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* it. It then resubmits the URB to receive more data.
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*/
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void capture_urb_complete(struct urb *urb)
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{
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struct tascam_card *tascam = urb->context;
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int ret;
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unsigned long flags;
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if (urb->status) {
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if (urb->status != -ENOENT && urb->status != -ECONNRESET && urb->status != -ESHUTDOWN &&
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urb->status != -ENODEV && urb->status != -EPROTO)
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dev_err_ratelimited(tascam->card->dev, "Capture URB failed: %d\n", urb->status);
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goto out;
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}
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if (!tascam || !atomic_read(&tascam->capture_active))
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goto out;
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if (urb->actual_length > 0) {
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size_t i;
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size_t write_ptr;
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spin_lock_irqsave(&tascam->lock, flags);
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write_ptr = tascam->capture_ring_buffer_write_ptr;
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for (i = 0; i < urb->actual_length; i++) {
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tascam->capture_ring_buffer[write_ptr] = ((u8 *)urb->transfer_buffer)[i];
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write_ptr = (write_ptr + 1) % CAPTURE_RING_BUFFER_SIZE;
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}
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tascam->capture_ring_buffer_write_ptr = write_ptr;
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spin_unlock_irqrestore(&tascam->lock, flags);
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schedule_work(&tascam->capture_work);
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}
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usb_get_urb(urb);
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usb_anchor_urb(urb, &tascam->capture_anchor);
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ret = usb_submit_urb(urb, GFP_ATOMIC);
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if (ret < 0) {
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dev_err_ratelimited(tascam->card->dev, "Failed to resubmit capture URB: %d\n", ret);
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usb_unanchor_urb(urb);
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usb_put_urb(urb);
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}
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out:
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usb_put_urb(urb);
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}
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@ -0,0 +1,12 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __US144MKII_CAPTURE_H
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#define __US144MKII_CAPTURE_H
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#include "us144mkii.h"
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void process_capture_routing_us144mkii(struct tascam_card *tascam, const s32 *decoded_block, s32 *routed_block);
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void decode_tascam_capture_block(const u8 *src_block, s32 *dst_block);
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void tascam_capture_work_handler(struct work_struct *work);
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void capture_urb_complete(struct urb *urb);
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#endif /* __US144MKII_CAPTURE_H */
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@ -0,0 +1,203 @@
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// SPDX-License-Identifier: GPL-2.0-only
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#include "us144mkii.h"
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#include "controls.h"
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static const char * const playback_source_texts[] = {"Playback 1-2", "Playback 3-4"};
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static const char * const capture_source_texts[] = {"Analog In", "Digital In"};
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static int tascam_playback_source_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
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uinfo->count = 1;
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uinfo->value.enumerated.items = 2;
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if (uinfo->value.enumerated.item >= 2)
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uinfo->value.enumerated.item = 1;
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strscpy(uinfo->value.enumerated.name,
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playback_source_texts[uinfo->value.enumerated.item],
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sizeof(uinfo->value.enumerated.name));
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return 0;
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}
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static int tascam_line_out_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
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{
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struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
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ucontrol->value.enumerated.item[0] = tascam->line_out_source;
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return 0;
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}
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static int tascam_line_out_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
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{
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struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
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if (ucontrol->value.enumerated.item[0] > 1)
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return -EINVAL;
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if (tascam->line_out_source == ucontrol->value.enumerated.item[0])
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return 0;
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tascam->line_out_source = ucontrol->value.enumerated.item[0];
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return 1;
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}
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static const struct snd_kcontrol_new tascam_line_out_control = {
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "Line OUTPUTS Source",
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.info = tascam_playback_source_info, .get = tascam_line_out_get, .put = tascam_line_out_put,
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};
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static int tascam_digital_out_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
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{
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struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
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ucontrol->value.enumerated.item[0] = tascam->digital_out_source;
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return 0;
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}
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static int tascam_digital_out_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
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{
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struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
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if (ucontrol->value.enumerated.item[0] > 1)
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return -EINVAL;
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if (tascam->digital_out_source == ucontrol->value.enumerated.item[0])
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return 0;
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tascam->digital_out_source = ucontrol->value.enumerated.item[0];
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return 1;
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}
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static const struct snd_kcontrol_new tascam_digital_out_control = {
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.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "Digital OUTPUTS Source",
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.info = tascam_playback_source_info, .get = tascam_digital_out_get, .put = tascam_digital_out_put,
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};
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static int tascam_capture_source_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
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uinfo->count = 1;
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uinfo->value.enumerated.items = 2;
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if (uinfo->value.enumerated.item >= 2)
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uinfo->value.enumerated.item = 1;
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strscpy(uinfo->value.enumerated.name,
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capture_source_texts[uinfo->value.enumerated.item],
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sizeof(uinfo->value.enumerated.name));
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return 0;
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}
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static int tascam_capture_12_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
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{
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struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
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ucontrol->value.enumerated.item[0] = tascam->capture_12_source;
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return 0;
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}
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static int tascam_capture_12_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
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{
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struct tascam_card *tascam = snd_kcontrol_chip(kcontrol);
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if (ucontrol->value.enumerated.item[0] > 1)
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return -EINVAL;
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if (tascam->capture_12_source == ucontrol->value.enumerated.item[0])
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return 0;
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tascam->capture_12_source = ucontrol->value.enumerated.item[0];
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return 1;
|
||||
}
|
||||
|
||||
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,
|
||||
};
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
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,
|
||||
};
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
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;
|
||||
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;
|
||||
kfree(buf);
|
||||
return 0;
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
#ifndef __US144MKII_CONTROLS_H
|
||||
#define __US144MKII_CONTROLS_H
|
||||
|
||||
#include "us144mkii.h"
|
||||
|
||||
int tascam_create_controls(struct tascam_card *tascam);
|
||||
|
||||
#endif /* __US144MKII_CONTROLS_H */
|
||||
|
|
@ -0,0 +1,331 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
|
||||
#include "us144mkii.h"
|
||||
#include "midi.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.
|
||||
*/
|
||||
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];
|
||||
unsigned int len;
|
||||
int i;
|
||||
|
||||
if (!tascam->midi_in_substream)
|
||||
return;
|
||||
|
||||
while (!kfifo_is_empty(&tascam->midi_in_fifo)) {
|
||||
len = kfifo_out_spinlocked(&tascam->midi_in_fifo,
|
||||
buf, sizeof(buf), &tascam->midi_in_lock);
|
||||
|
||||
if (len == 0)
|
||||
continue;
|
||||
|
||||
if (!tascam->midi_in_substream)
|
||||
continue;
|
||||
|
||||
for (i = 0; i < len; ++i) {
|
||||
/* Skip padding bytes */
|
||||
if (buf[i] == 0xfd)
|
||||
continue;
|
||||
|
||||
/* The last byte is often a terminator (0x00, 0xFF). Ignore it. */
|
||||
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);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 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)
|
||||
{
|
||||
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);
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
static int tascam_midi_in_close(struct snd_rawmidi_substream *substream)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void tascam_midi_in_trigger(struct snd_rawmidi_substream *substream, int up)
|
||||
{
|
||||
struct tascam_card *tascam = substream->rmidi->private_data;
|
||||
int i, err;
|
||||
unsigned long flags;
|
||||
|
||||
if (up) {
|
||||
if (atomic_xchg(&tascam->midi_in_active, 1) == 0) {
|
||||
spin_lock_irqsave(&tascam->midi_in_lock, flags);
|
||||
kfifo_reset(&tascam->midi_in_fifo);
|
||||
spin_unlock_irqrestore(&tascam->midi_in_lock, flags);
|
||||
|
||||
for (i = 0; i < NUM_MIDI_IN_URBS; i++) {
|
||||
usb_get_urb(tascam->midi_in_urbs[i]);
|
||||
usb_anchor_urb(tascam->midi_in_urbs[i], &tascam->midi_in_anchor);
|
||||
err = usb_submit_urb(tascam->midi_in_urbs[i], GFP_KERNEL);
|
||||
if (err < 0) {
|
||||
dev_err(tascam->card->dev, "Failed to submit MIDI IN URB %d: %d\n", i, err);
|
||||
usb_unanchor_urb(tascam->midi_in_urbs[i]);
|
||||
usb_put_urb(tascam->midi_in_urbs[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
} 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);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static struct snd_rawmidi_ops tascam_midi_in_ops = {
|
||||
.open = tascam_midi_in_open,
|
||||
.close = tascam_midi_in_close,
|
||||
.trigger = tascam_midi_in_trigger,
|
||||
};
|
||||
|
||||
/**
|
||||
* 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)
|
||||
{
|
||||
struct tascam_card *tascam = urb->context;
|
||||
unsigned long flags;
|
||||
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);
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
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.
|
||||
*/
|
||||
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) {
|
||||
unsigned long flags;
|
||||
int urb_index;
|
||||
struct urb *urb;
|
||||
u8 *buf;
|
||||
int bytes_to_send;
|
||||
|
||||
spin_lock_irqsave(&tascam->midi_out_lock, flags);
|
||||
|
||||
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) {
|
||||
spin_unlock_irqrestore(&tascam->midi_out_lock, flags);
|
||||
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) {
|
||||
spin_unlock_irqrestore(&tascam->midi_out_lock, flags);
|
||||
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;
|
||||
spin_unlock_irqrestore(&tascam->midi_out_lock, flags);
|
||||
|
||||
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);
|
||||
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);
|
||||
usb_unanchor_urb(urb);
|
||||
usb_put_urb(urb);
|
||||
break; /* Stop on error */
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
static int tascam_midi_out_close(struct snd_rawmidi_substream *substream)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
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);
|
||||
usb_kill_anchored_urbs(&tascam->midi_out_anchor);
|
||||
}
|
||||
|
||||
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);
|
||||
}
|
||||
}
|
||||
|
||||
static 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,
|
||||
};
|
||||
|
||||
/**
|
||||
* 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)
|
||||
{
|
||||
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;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
#ifndef __US144MKII_MIDI_H
|
||||
#define __US144MKII_MIDI_H
|
||||
|
||||
#include "us144mkii.h"
|
||||
|
||||
int tascam_create_midi(struct tascam_card *tascam);
|
||||
|
||||
#endif /* __US144MKII_MIDI_H */
|
||||
|
|
@ -0,0 +1,699 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
|
||||
#include "us144mkii.h"
|
||||
#include "pcm.h"
|
||||
#include "playback.h"
|
||||
#include "capture.h"
|
||||
|
||||
static const unsigned int patterns_48khz[5][8] = {
|
||||
{5, 6, 6, 6, 6, 6, 6, 6},
|
||||
{6, 6, 6, 6, 6, 6, 6, 6},
|
||||
{6, 6, 6, 6, 6, 6, 6, 6},
|
||||
{6, 6, 6, 7, 6, 6, 6, 6},
|
||||
{7, 6, 6, 7, 6, 6, 7, 6}
|
||||
};
|
||||
static const unsigned int patterns_96khz[5][8] = {
|
||||
{11, 12, 12, 12, 12, 12, 12, 12},
|
||||
{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}
|
||||
};
|
||||
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}
|
||||
};
|
||||
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},
|
||||
{5, 6, 5, 6, 5, 6, 5, 6},
|
||||
{6, 6, 6, 6, 6, 6, 6, 5}
|
||||
};
|
||||
|
||||
static const struct snd_pcm_hardware tascam_pcm_hw = {
|
||||
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
|
||||
SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID |
|
||||
SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
|
||||
.formats = SNDRV_PCM_FMTBIT_S24_3LE,
|
||||
.rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
|
||||
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000),
|
||||
.rate_min = 44100, .rate_max = 96000,
|
||||
.channels_min = NUM_CHANNELS,
|
||||
.channels_max = NUM_CHANNELS,
|
||||
.buffer_bytes_max = 1024 * 1024,
|
||||
.period_bytes_min = 48 * BYTES_PER_FRAME,
|
||||
.period_bytes_max = 1024 * BYTES_PER_FRAME,
|
||||
.periods_min = 2, .periods_max = 1024,
|
||||
};
|
||||
|
||||
/**
|
||||
* tascam_free_urbs() - Free all allocated URBs and associated buffers.
|
||||
* @tascam: the tascam_card instance
|
||||
*
|
||||
* This function kills, unlinks, and frees all playback, feedback, capture,
|
||||
* and MIDI URBs, along with their transfer buffers and the capture
|
||||
* ring/decode buffers.
|
||||
*/
|
||||
void tascam_free_urbs(struct tascam_card *tascam)
|
||||
{
|
||||
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,
|
||||
tascam->playback_urbs[i]->transfer_buffer,
|
||||
tascam->playback_urbs[i]->transfer_dma);
|
||||
usb_free_urb(tascam->playback_urbs[i]);
|
||||
tascam->playback_urbs[i] = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
usb_kill_anchored_urbs(&tascam->feedback_anchor);
|
||||
for (i = 0; i < NUM_FEEDBACK_URBS; i++) {
|
||||
if (tascam->feedback_urbs[i]) {
|
||||
usb_free_coherent(tascam->dev, tascam->feedback_urb_alloc_size,
|
||||
tascam->feedback_urbs[i]->transfer_buffer,
|
||||
tascam->feedback_urbs[i]->transfer_dma);
|
||||
usb_free_urb(tascam->feedback_urbs[i]);
|
||||
tascam->feedback_urbs[i] = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
usb_kill_anchored_urbs(&tascam->capture_anchor);
|
||||
for (i = 0; i < NUM_CAPTURE_URBS; i++) {
|
||||
if (tascam->capture_urbs[i]) {
|
||||
usb_free_coherent(tascam->dev, tascam->capture_urb_alloc_size,
|
||||
tascam->capture_urbs[i]->transfer_buffer,
|
||||
tascam->capture_urbs[i]->transfer_dma);
|
||||
usb_free_urb(tascam->capture_urbs[i]);
|
||||
tascam->capture_urbs[i] = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
usb_kill_anchored_urbs(&tascam->midi_in_anchor);
|
||||
for (i = 0; i < NUM_MIDI_IN_URBS; i++) {
|
||||
if (tascam->midi_in_urbs[i]) {
|
||||
usb_free_coherent(tascam->dev, MIDI_IN_BUF_SIZE,
|
||||
tascam->midi_in_urbs[i]->transfer_buffer,
|
||||
tascam->midi_in_urbs[i]->transfer_dma);
|
||||
usb_free_urb(tascam->midi_in_urbs[i]);
|
||||
tascam->midi_in_urbs[i] = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
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->playback_routing_buffer);
|
||||
tascam->playback_routing_buffer = NULL;
|
||||
kfree(tascam->capture_routing_buffer);
|
||||
tascam->capture_routing_buffer = NULL;
|
||||
kfree(tascam->capture_decode_dst_block);
|
||||
tascam->capture_decode_dst_block = NULL;
|
||||
kfree(tascam->capture_decode_raw_block);
|
||||
tascam->capture_decode_raw_block = NULL;
|
||||
kfree(tascam->capture_ring_buffer);
|
||||
tascam->capture_ring_buffer = NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* tascam_alloc_urbs() - Allocate all URBs and associated buffers.
|
||||
* @tascam: the tascam_card instance
|
||||
*
|
||||
* This function allocates and initializes all URBs for playback, feedback,
|
||||
* capture, and MIDI, as well as the necessary buffers for data processing.
|
||||
*
|
||||
* Return: 0 on success, or a negative error code on failure.
|
||||
*/
|
||||
int tascam_alloc_urbs(struct tascam_card *tascam)
|
||||
{
|
||||
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;
|
||||
|
||||
for (i = 0; i < NUM_PLAYBACK_URBS; i++) {
|
||||
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,
|
||||
GFP_KERNEL, &urb->transfer_dma);
|
||||
if (!urb->transfer_buffer)
|
||||
goto error;
|
||||
|
||||
urb->dev = tascam->dev;
|
||||
urb->pipe = usb_sndisocpipe(tascam->dev, EP_AUDIO_OUT);
|
||||
urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
|
||||
urb->interval = 1;
|
||||
urb->context = tascam;
|
||||
urb->complete = playback_urb_complete;
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
if (!f_urb)
|
||||
goto error;
|
||||
tascam->feedback_urbs[i] = f_urb;
|
||||
|
||||
f_urb->transfer_buffer = usb_alloc_coherent(tascam->dev, tascam->feedback_urb_alloc_size,
|
||||
GFP_KERNEL, &f_urb->transfer_dma);
|
||||
if (!f_urb->transfer_buffer)
|
||||
goto error;
|
||||
|
||||
f_urb->dev = tascam->dev;
|
||||
f_urb->pipe = usb_rcvisocpipe(tascam->dev, EP_PLAYBACK_FEEDBACK);
|
||||
f_urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
|
||||
f_urb->interval = 4;
|
||||
f_urb->context = tascam;
|
||||
f_urb->complete = feedback_urb_complete;
|
||||
}
|
||||
|
||||
tascam->capture_urb_alloc_size = CAPTURE_URB_SIZE;
|
||||
for (i = 0; i < NUM_CAPTURE_URBS; i++) {
|
||||
struct urb *c_urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
|
||||
if (!c_urb)
|
||||
goto error;
|
||||
tascam->capture_urbs[i] = c_urb;
|
||||
|
||||
c_urb->transfer_buffer = usb_alloc_coherent(tascam->dev, tascam->capture_urb_alloc_size,
|
||||
GFP_KERNEL, &c_urb->transfer_dma);
|
||||
if (!c_urb->transfer_buffer)
|
||||
goto error;
|
||||
|
||||
usb_fill_bulk_urb(c_urb, tascam->dev,
|
||||
usb_rcvbulkpipe(tascam->dev, EP_AUDIO_IN),
|
||||
c_urb->transfer_buffer,
|
||||
tascam->capture_urb_alloc_size,
|
||||
capture_urb_complete,
|
||||
tascam);
|
||||
c_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
||||
}
|
||||
|
||||
/* MIDI URB and buffer allocation */
|
||||
for (i = 0; i < NUM_MIDI_IN_URBS; i++) {
|
||||
struct urb *m_urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
|
||||
if (!m_urb)
|
||||
goto error;
|
||||
tascam->midi_in_urbs[i] = m_urb;
|
||||
m_urb->transfer_buffer = usb_alloc_coherent(tascam->dev,
|
||||
MIDI_IN_BUF_SIZE, GFP_KERNEL, &m_urb->transfer_dma);
|
||||
if (!m_urb->transfer_buffer)
|
||||
goto error;
|
||||
usb_fill_bulk_urb(m_urb, tascam->dev, usb_rcvbulkpipe(tascam->dev, EP_MIDI_IN),
|
||||
m_urb->transfer_buffer, MIDI_IN_BUF_SIZE,
|
||||
tascam_midi_in_urb_complete, tascam);
|
||||
m_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
||||
}
|
||||
|
||||
for (i = 0; i < NUM_MIDI_OUT_URBS; i++) {
|
||||
struct urb *m_urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
|
||||
if (!m_urb)
|
||||
goto error;
|
||||
tascam->midi_out_urbs[i] = m_urb;
|
||||
m_urb->transfer_buffer = usb_alloc_coherent(tascam->dev,
|
||||
MIDI_OUT_BUF_SIZE, GFP_KERNEL, &m_urb->transfer_dma);
|
||||
if (!m_urb->transfer_buffer)
|
||||
goto error;
|
||||
usb_fill_bulk_urb(m_urb, tascam->dev,
|
||||
usb_sndbulkpipe(tascam->dev, EP_MIDI_OUT),
|
||||
m_urb->transfer_buffer, 0, /* length set later */
|
||||
tascam_midi_out_urb_complete, tascam);
|
||||
m_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
||||
}
|
||||
|
||||
tascam->capture_ring_buffer = kmalloc(CAPTURE_RING_BUFFER_SIZE, GFP_KERNEL);
|
||||
if (!tascam->capture_ring_buffer)
|
||||
goto error;
|
||||
|
||||
tascam->capture_decode_raw_block = kmalloc(RAW_BYTES_PER_DECODE_BLOCK, GFP_KERNEL);
|
||||
if (!tascam->capture_decode_raw_block)
|
||||
goto error;
|
||||
|
||||
tascam->capture_decode_dst_block = kmalloc(FRAMES_PER_DECODE_BLOCK * DECODED_CHANNELS_PER_FRAME * DECODED_SAMPLE_SIZE, GFP_KERNEL);
|
||||
if (!tascam->capture_decode_dst_block)
|
||||
goto error;
|
||||
|
||||
tascam->playback_routing_buffer = kmalloc(tascam->playback_urb_alloc_size, GFP_KERNEL);
|
||||
if (!tascam->playback_routing_buffer)
|
||||
goto error;
|
||||
|
||||
tascam->capture_routing_buffer = kmalloc(FRAMES_PER_DECODE_BLOCK * DECODED_CHANNELS_PER_FRAME * DECODED_SAMPLE_SIZE, GFP_KERNEL);
|
||||
if (!tascam->capture_routing_buffer)
|
||||
goto error;
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
dev_err(tascam->card->dev, "Failed to allocate URBs\n");
|
||||
tascam_free_urbs(tascam);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/**
|
||||
* us144mkii_configure_device_for_rate() - Set sample rate via USB control msgs
|
||||
* @tascam: the tascam_card instance
|
||||
* @rate: the target sample rate (e.g., 44100, 96000)
|
||||
*
|
||||
* This function sends a sequence of vendor-specific and UAC control messages
|
||||
* to configure the device hardware for the specified sample rate.
|
||||
*
|
||||
* Return: 0 on success, or a negative error code on failure.
|
||||
*/
|
||||
int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate)
|
||||
{
|
||||
struct usb_device *dev = tascam->dev;
|
||||
u8 *rate_payload_buf;
|
||||
u16 rate_vendor_wValue;
|
||||
int err = 0;
|
||||
const u8 *current_payload_src;
|
||||
|
||||
static const u8 payload_44100[] = {0x44, 0xac, 0x00};
|
||||
static const u8 payload_48000[] = {0x80, 0xbb, 0x00};
|
||||
static const u8 payload_88200[] = {0x88, 0x58, 0x01};
|
||||
static const u8 payload_96000[] = {0x00, 0x77, 0x01};
|
||||
|
||||
switch (rate) {
|
||||
case 44100:
|
||||
current_payload_src = payload_44100;
|
||||
rate_vendor_wValue = REG_ADDR_RATE_44100;
|
||||
break;
|
||||
case 48000:
|
||||
current_payload_src = payload_48000;
|
||||
rate_vendor_wValue = REG_ADDR_RATE_48000;
|
||||
break;
|
||||
case 88200:
|
||||
current_payload_src = payload_88200;
|
||||
rate_vendor_wValue = REG_ADDR_RATE_88200;
|
||||
break;
|
||||
case 96000:
|
||||
current_payload_src = payload_96000;
|
||||
rate_vendor_wValue = REG_ADDR_RATE_96000;
|
||||
break;
|
||||
default:
|
||||
dev_err(&dev->dev, "Unsupported sample rate %d for configuration\n", rate);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
rate_payload_buf = kmemdup(current_payload_src, 3, GFP_KERNEL);
|
||||
if (!rate_payload_buf)
|
||||
return -ENOMEM;
|
||||
|
||||
dev_info(&dev->dev, "Configuring device for %d Hz\n", rate);
|
||||
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_MODE_CONTROL, RT_H2D_VENDOR_DEV, MODE_VAL_CONFIG, 0x0000, NULL, 0, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL, EP_AUDIO_IN, rate_payload_buf, 3, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, RT_H2D_CLASS_EP, UAC_SAMPLING_FREQ_CONTROL, EP_AUDIO_OUT, rate_payload_buf, 3, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, REG_ADDR_UNKNOWN_0D, REG_VAL_ENABLE, NULL, 0, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, REG_ADDR_UNKNOWN_0E, REG_VAL_ENABLE, NULL, 0, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, REG_ADDR_UNKNOWN_0F, REG_VAL_ENABLE, NULL, 0, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, rate_vendor_wValue, REG_VAL_ENABLE, NULL, 0, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_REGISTER_WRITE, RT_H2D_VENDOR_DEV, REG_ADDR_UNKNOWN_11, REG_VAL_ENABLE, NULL, 0, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), VENDOR_REQ_MODE_CONTROL, RT_H2D_VENDOR_DEV, MODE_VAL_STREAM_START, 0x0000, NULL, 0, USB_CTRL_TIMEOUT_MS);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
|
||||
kfree(rate_payload_buf);
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
dev_err(&dev->dev, "Device configuration failed at rate %d with error %d\n", rate, err);
|
||||
kfree(rate_payload_buf);
|
||||
return err;
|
||||
}
|
||||
|
||||
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;
|
||||
tascam->playback_substream = substream;
|
||||
atomic_set(&tascam->playback_active, 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
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;
|
||||
tascam->capture_substream = substream;
|
||||
atomic_set(&tascam->capture_active, 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tascam_playback_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
|
||||
|
||||
tascam->playback_substream = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tascam_capture_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
|
||||
|
||||
tascam->capture_substream = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tascam_pcm_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params)
|
||||
{
|
||||
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
|
||||
int err;
|
||||
unsigned int rate = params_rate(params);
|
||||
|
||||
err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
||||
switch (rate) {
|
||||
case 44100:
|
||||
tascam->feedback_patterns = patterns_44khz;
|
||||
tascam->feedback_base_value = 43;
|
||||
tascam->feedback_max_value = 45;
|
||||
break;
|
||||
case 48000:
|
||||
tascam->feedback_patterns = patterns_48khz;
|
||||
tascam->feedback_base_value = 47;
|
||||
tascam->feedback_max_value = 49;
|
||||
break;
|
||||
case 88200:
|
||||
tascam->feedback_patterns = patterns_88khz;
|
||||
tascam->feedback_base_value = 87;
|
||||
tascam->feedback_max_value = 89;
|
||||
break;
|
||||
case 96000:
|
||||
tascam->feedback_patterns = patterns_96khz;
|
||||
tascam->feedback_base_value = 95;
|
||||
tascam->feedback_max_value = 97;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
if (tascam->current_rate != rate) {
|
||||
err = us144mkii_configure_device_for_rate(tascam, rate);
|
||||
if (err < 0) {
|
||||
tascam->current_rate = 0;
|
||||
return err;
|
||||
}
|
||||
tascam->current_rate = rate;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tascam_pcm_hw_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
return snd_pcm_lib_free_pages(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;
|
||||
size_t nominal_frames_per_packet, nominal_bytes_per_packet;
|
||||
size_t total_bytes_in_urb;
|
||||
unsigned int feedback_packets;
|
||||
|
||||
tascam->driver_playback_pos = 0;
|
||||
tascam->playback_frames_consumed = 0;
|
||||
tascam->last_period_pos = 0;
|
||||
tascam->feedback_pattern_in_idx = 0;
|
||||
tascam->feedback_pattern_out_idx = 0;
|
||||
tascam->feedback_synced = false;
|
||||
tascam->feedback_consecutive_errors = 0;
|
||||
tascam->feedback_urb_skip_count = NUM_FEEDBACK_URBS;
|
||||
|
||||
nominal_frames_per_packet = runtime->rate / 8000;
|
||||
for (i = 0; i < FEEDBACK_ACCUMULATOR_SIZE; i++)
|
||||
tascam->feedback_accumulator_pattern[i] = nominal_frames_per_packet;
|
||||
|
||||
feedback_packets = 1;
|
||||
|
||||
for (i = 0; i < NUM_FEEDBACK_URBS; i++) {
|
||||
struct urb *f_urb = tascam->feedback_urbs[i];
|
||||
int j;
|
||||
|
||||
f_urb->number_of_packets = feedback_packets;
|
||||
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].length = FEEDBACK_PACKET_SIZE;
|
||||
}
|
||||
}
|
||||
|
||||
nominal_bytes_per_packet = nominal_frames_per_packet * BYTES_PER_FRAME;
|
||||
total_bytes_in_urb = nominal_bytes_per_packet * PLAYBACK_URB_PACKETS;
|
||||
|
||||
for (u = 0; u < NUM_PLAYBACK_URBS; u++) {
|
||||
struct urb *urb = tascam->playback_urbs[u];
|
||||
|
||||
memset(urb->transfer_buffer, 0, tascam->playback_urb_alloc_size);
|
||||
urb->transfer_buffer_length = total_bytes_in_urb;
|
||||
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;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tascam_capture_prepare(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
|
||||
|
||||
tascam->driver_capture_pos = 0;
|
||||
tascam->capture_frames_processed = 0;
|
||||
tascam->last_capture_period_pos = 0;
|
||||
tascam->capture_ring_buffer_read_ptr = 0;
|
||||
tascam->capture_ring_buffer_write_ptr = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void tascam_stop_work_handler(struct work_struct *work)
|
||||
{
|
||||
struct tascam_card *tascam = container_of(work, struct tascam_card, stop_work);
|
||||
|
||||
usb_kill_anchored_urbs(&tascam->playback_anchor);
|
||||
usb_kill_anchored_urbs(&tascam->feedback_anchor);
|
||||
usb_kill_anchored_urbs(&tascam->capture_anchor);
|
||||
atomic_set(&tascam->active_urbs, 0);
|
||||
cancel_work_sync(&tascam->capture_work);
|
||||
}
|
||||
|
||||
static 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;
|
||||
int i;
|
||||
bool do_start = false;
|
||||
bool do_stop = false;
|
||||
|
||||
spin_lock_irqsave(&tascam->lock, flags);
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
if (!atomic_read(&tascam->playback_active)) {
|
||||
atomic_set(&tascam->playback_active, 1);
|
||||
atomic_set(&tascam->capture_active, 1);
|
||||
do_start = true;
|
||||
}
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
||||
if (atomic_read(&tascam->playback_active)) {
|
||||
atomic_set(&tascam->playback_active, 0);
|
||||
atomic_set(&tascam->capture_active, 0);
|
||||
do_stop = true;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
err = -EINVAL;
|
||||
break;
|
||||
}
|
||||
spin_unlock_irqrestore(&tascam->lock, flags);
|
||||
|
||||
if (do_start) {
|
||||
if (atomic_read(&tascam->active_urbs) > 0) {
|
||||
dev_warn(tascam->card->dev, "Cannot start, URBs still active.\n");
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
for (i = 0; i < NUM_FEEDBACK_URBS; i++) {
|
||||
usb_get_urb(tascam->feedback_urbs[i]);
|
||||
usb_anchor_urb(tascam->feedback_urbs[i], &tascam->feedback_anchor);
|
||||
err = usb_submit_urb(tascam->feedback_urbs[i], GFP_ATOMIC);
|
||||
if (err < 0) {
|
||||
usb_unanchor_urb(tascam->feedback_urbs[i]);
|
||||
usb_put_urb(tascam->feedback_urbs[i]);
|
||||
goto start_rollback;
|
||||
}
|
||||
atomic_inc(&tascam->active_urbs);
|
||||
}
|
||||
for (i = 0; i < NUM_PLAYBACK_URBS; i++) {
|
||||
usb_get_urb(tascam->playback_urbs[i]);
|
||||
usb_anchor_urb(tascam->playback_urbs[i], &tascam->playback_anchor);
|
||||
err = usb_submit_urb(tascam->playback_urbs[i], GFP_ATOMIC);
|
||||
if (err < 0) {
|
||||
usb_unanchor_urb(tascam->playback_urbs[i]);
|
||||
usb_put_urb(tascam->playback_urbs[i]);
|
||||
goto start_rollback;
|
||||
}
|
||||
atomic_inc(&tascam->active_urbs);
|
||||
}
|
||||
for (i = 0; i < NUM_CAPTURE_URBS; i++) {
|
||||
usb_get_urb(tascam->capture_urbs[i]);
|
||||
usb_anchor_urb(tascam->capture_urbs[i], &tascam->capture_anchor);
|
||||
err = usb_submit_urb(tascam->capture_urbs[i], GFP_ATOMIC);
|
||||
if (err < 0) {
|
||||
usb_unanchor_urb(tascam->capture_urbs[i]);
|
||||
usb_put_urb(tascam->capture_urbs[i]);
|
||||
goto start_rollback;
|
||||
}
|
||||
atomic_inc(&tascam->active_urbs);
|
||||
}
|
||||
|
||||
return 0;
|
||||
start_rollback:
|
||||
dev_err(tascam->card->dev, "Failed to submit URBs to start stream: %d\n", err);
|
||||
do_stop = true;
|
||||
}
|
||||
|
||||
if (do_stop)
|
||||
schedule_work(&tascam->stop_work);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
static snd_pcm_uframes_t tascam_playback_pointer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
u64 pos;
|
||||
unsigned long flags;
|
||||
|
||||
if (!atomic_read(&tascam->playback_active))
|
||||
return 0;
|
||||
|
||||
spin_lock_irqsave(&tascam->lock, flags);
|
||||
pos = tascam->playback_frames_consumed;
|
||||
spin_unlock_irqrestore(&tascam->lock, flags);
|
||||
|
||||
return runtime ? pos % runtime->buffer_size : 0;
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t tascam_capture_pointer(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct tascam_card *tascam = snd_pcm_substream_chip(substream);
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
u64 pos;
|
||||
unsigned long flags;
|
||||
|
||||
if (!atomic_read(&tascam->capture_active))
|
||||
return 0;
|
||||
|
||||
spin_lock_irqsave(&tascam->lock, flags);
|
||||
pos = tascam->capture_frames_processed;
|
||||
spin_unlock_irqrestore(&tascam->lock, flags);
|
||||
|
||||
return runtime ? pos % runtime->buffer_size : 0;
|
||||
}
|
||||
|
||||
const struct snd_pcm_ops tascam_playback_ops = {
|
||||
.open = tascam_playback_open,
|
||||
.close = tascam_playback_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = tascam_pcm_hw_params,
|
||||
.hw_free = tascam_pcm_hw_free,
|
||||
.prepare = tascam_playback_prepare,
|
||||
.trigger = tascam_pcm_trigger,
|
||||
.pointer = tascam_playback_pointer,
|
||||
};
|
||||
|
||||
const struct snd_pcm_ops tascam_capture_ops = {
|
||||
.open = tascam_capture_open,
|
||||
.close = tascam_capture_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = tascam_pcm_hw_params,
|
||||
.hw_free = tascam_pcm_hw_free,
|
||||
.prepare = tascam_capture_prepare,
|
||||
.trigger = tascam_pcm_trigger,
|
||||
.pointer = tascam_capture_pointer,
|
||||
};
|
||||
|
||||
int tascam_create_pcm(struct tascam_card *tascam)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = snd_pcm_new(tascam->card, "US144MKII", 0, 1, 1, &tascam->pcm);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
tascam->pcm->private_data = tascam;
|
||||
strscpy(tascam->pcm->name, "US144MKII", sizeof(tascam->pcm->name));
|
||||
|
||||
snd_pcm_set_ops(tascam->pcm, SNDRV_PCM_STREAM_PLAYBACK, &tascam_playback_ops);
|
||||
snd_pcm_set_ops(tascam->pcm, SNDRV_PCM_STREAM_CAPTURE, &tascam_capture_ops);
|
||||
|
||||
snd_pcm_lib_preallocate_pages_for_all(tascam->pcm, SNDRV_DMA_TYPE_CONTINUOUS,
|
||||
tascam->dev->dev.parent,
|
||||
64 * 1024, tascam_pcm_hw.buffer_bytes_max);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
#ifndef __US144MKII_PCM_H
|
||||
#define __US144MKII_PCM_H
|
||||
|
||||
#include "us144mkii.h"
|
||||
|
||||
extern const struct snd_pcm_ops tascam_playback_ops;
|
||||
extern const struct snd_pcm_ops tascam_capture_ops;
|
||||
|
||||
int tascam_create_pcm(struct tascam_card *tascam);
|
||||
void tascam_free_urbs(struct tascam_card *tascam);
|
||||
int tascam_alloc_urbs(struct tascam_card *tascam);
|
||||
int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate);
|
||||
void tascam_stop_work_handler(struct work_struct *work);
|
||||
|
||||
#endif /* __US144MKII_PCM_H */
|
||||
|
|
@ -0,0 +1,288 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
|
||||
#include "us144mkii.h"
|
||||
#include "playback.h"
|
||||
|
||||
/**
|
||||
* process_playback_routing_us144mkii() - Apply playback routing matrix
|
||||
* @tascam: The driver instance.
|
||||
* @src_buffer: Buffer containing 4 channels of S24_3LE audio from ALSA.
|
||||
* @dst_buffer: Buffer to be filled for the USB device.
|
||||
* @frames: Number of frames to process.
|
||||
*/
|
||||
void process_playback_routing_us144mkii(struct tascam_card *tascam,
|
||||
const u8 *src_buffer,
|
||||
u8 *dst_buffer, size_t frames)
|
||||
{
|
||||
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);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* playback_urb_complete() - Completion handler for playback isochronous URBs.
|
||||
* @urb: the completed URB
|
||||
*
|
||||
* This function runs in interrupt context. It calculates the number of bytes
|
||||
* to send in the next set of packets based on the feedback-driven clock,
|
||||
* copies the audio data from the ALSA ring buffer (applying routing), and
|
||||
* resubmits the URB.
|
||||
*/
|
||||
void playback_urb_complete(struct urb *urb)
|
||||
{
|
||||
struct tascam_card *tascam = urb->context;
|
||||
struct snd_pcm_substream *substream;
|
||||
struct snd_pcm_runtime *runtime;
|
||||
unsigned long flags;
|
||||
u8 *src_buf, *dst_buf;
|
||||
size_t total_bytes_for_urb = 0;
|
||||
snd_pcm_uframes_t offset_frames;
|
||||
snd_pcm_uframes_t frames_to_copy;
|
||||
int ret, i;
|
||||
|
||||
if (urb->status) {
|
||||
if (urb->status != -ENOENT && urb->status != -ECONNRESET && urb->status != -ESHUTDOWN &&
|
||||
urb->status != -ENODEV)
|
||||
dev_err_ratelimited(tascam->card->dev, "Playback URB failed: %d\n", urb->status);
|
||||
goto out;
|
||||
}
|
||||
if (!tascam || !atomic_read(&tascam->playback_active))
|
||||
goto out;
|
||||
|
||||
substream = tascam->playback_substream;
|
||||
if (!substream || !substream->runtime)
|
||||
goto out;
|
||||
runtime = substream->runtime;
|
||||
|
||||
spin_lock_irqsave(&tascam->lock, flags);
|
||||
|
||||
for (i = 0; i < urb->number_of_packets; i++) {
|
||||
unsigned int frames_for_packet;
|
||||
size_t bytes_for_packet;
|
||||
|
||||
if (tascam->feedback_synced) {
|
||||
frames_for_packet = tascam->feedback_accumulator_pattern[tascam->feedback_pattern_out_idx];
|
||||
tascam->feedback_pattern_out_idx = (tascam->feedback_pattern_out_idx + 1) % FEEDBACK_ACCUMULATOR_SIZE;
|
||||
} else {
|
||||
frames_for_packet = runtime->rate / 8000;
|
||||
}
|
||||
bytes_for_packet = frames_for_packet * BYTES_PER_FRAME;
|
||||
|
||||
urb->iso_frame_desc[i].offset = total_bytes_for_urb;
|
||||
urb->iso_frame_desc[i].length = bytes_for_packet;
|
||||
total_bytes_for_urb += bytes_for_packet;
|
||||
}
|
||||
urb->transfer_buffer_length = total_bytes_for_urb;
|
||||
|
||||
offset_frames = tascam->driver_playback_pos;
|
||||
frames_to_copy = bytes_to_frames(runtime, total_bytes_for_urb);
|
||||
tascam->driver_playback_pos = (offset_frames + frames_to_copy) % runtime->buffer_size;
|
||||
|
||||
spin_unlock_irqrestore(&tascam->lock, flags);
|
||||
|
||||
if (total_bytes_for_urb > 0) {
|
||||
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;
|
||||
|
||||
memcpy(dst_buf, src_buf, first_chunk_bytes);
|
||||
memcpy(dst_buf + first_chunk_bytes, runtime->dma_area, second_chunk_bytes);
|
||||
} else {
|
||||
memcpy(dst_buf, src_buf, total_bytes_for_urb);
|
||||
}
|
||||
|
||||
/* Apply routing to the contiguous data in our routing buffer */
|
||||
process_playback_routing_us144mkii(tascam, dst_buf, dst_buf, frames_to_copy);
|
||||
memcpy(urb->transfer_buffer, dst_buf, total_bytes_for_urb);
|
||||
}
|
||||
|
||||
urb->dev = tascam->dev;
|
||||
usb_get_urb(urb);
|
||||
usb_anchor_urb(urb, &tascam->playback_anchor);
|
||||
ret = usb_submit_urb(urb, GFP_ATOMIC);
|
||||
if (ret < 0) {
|
||||
dev_err_ratelimited(tascam->card->dev, "Failed to resubmit playback URB: %d\n", ret);
|
||||
usb_unanchor_urb(urb);
|
||||
usb_put_urb(urb);
|
||||
}
|
||||
out:
|
||||
usb_put_urb(urb);
|
||||
}
|
||||
|
||||
/**
|
||||
* feedback_urb_complete() - Completion handler for feedback isochronous URBs.
|
||||
* @urb: the completed URB
|
||||
*
|
||||
* This is the master clock for the driver. It runs in interrupt context.
|
||||
* It reads the feedback value from the device, which indicates how many
|
||||
* samples the device has consumed. This information is used to adjust the
|
||||
* playback rate and to advance the capture stream pointer, keeping both
|
||||
* streams in sync. It then calls snd_pcm_period_elapsed if necessary and
|
||||
* resubmits itself.
|
||||
*/
|
||||
void feedback_urb_complete(struct urb *urb)
|
||||
{
|
||||
struct tascam_card *tascam = urb->context;
|
||||
struct snd_pcm_substream *playback_ss, *capture_ss;
|
||||
struct snd_pcm_runtime *playback_rt, *capture_rt;
|
||||
unsigned long flags;
|
||||
u64 total_frames_in_urb = 0;
|
||||
int ret, p;
|
||||
unsigned int old_in_idx, new_in_idx;
|
||||
bool playback_period_elapsed = false;
|
||||
bool capture_period_elapsed = false;
|
||||
|
||||
if (urb->status) {
|
||||
if (urb->status != -ENOENT && urb->status != -ECONNRESET && urb->status != -ESHUTDOWN &&
|
||||
urb->status != -ENODEV)
|
||||
dev_err_ratelimited(tascam->card->dev, "Feedback URB failed: %d\n", urb->status);
|
||||
goto out;
|
||||
}
|
||||
if (!tascam || !atomic_read(&tascam->playback_active))
|
||||
goto out;
|
||||
|
||||
playback_ss = tascam->playback_substream;
|
||||
if (!playback_ss || !playback_ss->runtime)
|
||||
goto out;
|
||||
playback_rt = playback_ss->runtime;
|
||||
|
||||
capture_ss = tascam->capture_substream;
|
||||
capture_rt = capture_ss ? capture_ss->runtime : NULL;
|
||||
|
||||
spin_lock_irqsave(&tascam->lock, flags);
|
||||
|
||||
if (tascam->feedback_urb_skip_count > 0) {
|
||||
tascam->feedback_urb_skip_count--;
|
||||
goto unlock_and_continue;
|
||||
}
|
||||
|
||||
old_in_idx = tascam->feedback_pattern_in_idx;
|
||||
|
||||
for (p = 0; p < urb->number_of_packets; p++) {
|
||||
u8 feedback_value = 0;
|
||||
const unsigned int *pattern;
|
||||
bool packet_ok = (urb->iso_frame_desc[p].status == 0 &&
|
||||
urb->iso_frame_desc[p].actual_length >= 1);
|
||||
|
||||
if (packet_ok)
|
||||
feedback_value = *((u8 *)urb->transfer_buffer + urb->iso_frame_desc[p].offset);
|
||||
|
||||
if (packet_ok && feedback_value >= tascam->feedback_base_value &&
|
||||
feedback_value <= tascam->feedback_max_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_accumulator_pattern[in_idx] = pattern[i];
|
||||
total_frames_in_urb += pattern[i];
|
||||
}
|
||||
} else {
|
||||
unsigned int nominal_frames = playback_rt->rate / 8000;
|
||||
int i;
|
||||
|
||||
if (tascam->feedback_synced) {
|
||||
tascam->feedback_consecutive_errors++;
|
||||
if (tascam->feedback_consecutive_errors > FEEDBACK_SYNC_LOSS_THRESHOLD) {
|
||||
dev_err(tascam->card->dev, "Fatal: Feedback sync lost. Stopping stream.\n");
|
||||
if (playback_ss)
|
||||
snd_pcm_stop(playback_ss, SNDRV_PCM_STATE_XRUN);
|
||||
if (capture_ss)
|
||||
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_accumulator_pattern[in_idx] = nominal_frames;
|
||||
total_frames_in_urb += nominal_frames;
|
||||
}
|
||||
}
|
||||
tascam->feedback_pattern_in_idx = (tascam->feedback_pattern_in_idx + 8) % FEEDBACK_ACCUMULATOR_SIZE;
|
||||
}
|
||||
|
||||
new_in_idx = tascam->feedback_pattern_in_idx;
|
||||
|
||||
if (!tascam->feedback_synced) {
|
||||
unsigned int out_idx = tascam->feedback_pattern_out_idx;
|
||||
bool is_ahead = (new_in_idx - out_idx) % FEEDBACK_ACCUMULATOR_SIZE < (FEEDBACK_ACCUMULATOR_SIZE / 2);
|
||||
bool was_behind = (old_in_idx - out_idx) % FEEDBACK_ACCUMULATOR_SIZE >= (FEEDBACK_ACCUMULATOR_SIZE / 2);
|
||||
|
||||
if (is_ahead && was_behind) {
|
||||
dev_dbg(tascam->card->dev, "Sync Acquired! (in: %u, out: %u)\n", new_in_idx, out_idx);
|
||||
tascam->feedback_synced = true;
|
||||
tascam->feedback_consecutive_errors = 0;
|
||||
}
|
||||
}
|
||||
|
||||
if (total_frames_in_urb > 0) {
|
||||
tascam->playback_frames_consumed += total_frames_in_urb;
|
||||
if (atomic_read(&tascam->capture_active))
|
||||
tascam->capture_frames_processed += total_frames_in_urb;
|
||||
}
|
||||
|
||||
if (playback_rt->period_size > 0) {
|
||||
u64 current_period = div_u64(tascam->playback_frames_consumed, playback_rt->period_size);
|
||||
|
||||
if (current_period > tascam->last_period_pos) {
|
||||
tascam->last_period_pos = current_period;
|
||||
playback_period_elapsed = true;
|
||||
}
|
||||
}
|
||||
|
||||
if (atomic_read(&tascam->capture_active) && capture_rt && capture_rt->period_size > 0) {
|
||||
u64 current_capture_period = div_u64(tascam->capture_frames_processed, capture_rt->period_size);
|
||||
|
||||
if (current_capture_period > tascam->last_capture_period_pos) {
|
||||
tascam->last_capture_period_pos = current_capture_period;
|
||||
capture_period_elapsed = true;
|
||||
}
|
||||
}
|
||||
|
||||
unlock_and_continue:
|
||||
spin_unlock_irqrestore(&tascam->lock, flags);
|
||||
|
||||
if (playback_period_elapsed)
|
||||
snd_pcm_period_elapsed(playback_ss);
|
||||
if (capture_period_elapsed)
|
||||
snd_pcm_period_elapsed(capture_ss);
|
||||
|
||||
urb->dev = tascam->dev;
|
||||
usb_get_urb(urb);
|
||||
usb_anchor_urb(urb, &tascam->feedback_anchor);
|
||||
ret = usb_submit_urb(urb, GFP_ATOMIC);
|
||||
if (ret < 0) {
|
||||
dev_err_ratelimited(tascam->card->dev, "Failed to resubmit feedback URB: %d\n", ret);
|
||||
usb_unanchor_urb(urb);
|
||||
usb_put_urb(urb);
|
||||
}
|
||||
out:
|
||||
usb_put_urb(urb);
|
||||
}
|
||||
|
|
@ -0,0 +1,11 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
#ifndef __US144MKII_PLAYBACK_H
|
||||
#define __US144MKII_PLAYBACK_H
|
||||
|
||||
#include "us144mkii.h"
|
||||
|
||||
void process_playback_routing_us144mkii(struct tascam_card *tascam, const u8 *src_buffer, u8 *dst_buffer, size_t frames);
|
||||
void playback_urb_complete(struct urb *urb);
|
||||
void feedback_urb_complete(struct urb *urb);
|
||||
|
||||
#endif /* __US144MKII_PLAYBACK_H */
|
||||
|
|
@ -0,0 +1,211 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-only */
|
||||
#ifndef __US144MKII_H
|
||||
#define __US144MKII_H
|
||||
|
||||
#include <linux/usb.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <linux/kfifo.h>
|
||||
#include <sound/core.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/pcm_params.h>
|
||||
#include <sound/rawmidi.h>
|
||||
#include <sound/initval.h>
|
||||
#include <sound/control.h>
|
||||
|
||||
#define DRIVER_NAME "snd-usb-us144mkii"
|
||||
#define DRIVER_VERSION "1.7.4"
|
||||
|
||||
/* --- USB Device Identification --- */
|
||||
#define USB_VID_TASCAM 0x0644
|
||||
#define USB_PID_TASCAM_US144MKII 0x8020
|
||||
|
||||
/* --- USB Endpoints (Alternate Setting 1) --- */
|
||||
#define EP_PLAYBACK_FEEDBACK 0x81
|
||||
#define EP_AUDIO_OUT 0x02
|
||||
#define EP_MIDI_IN 0x83
|
||||
#define EP_MIDI_OUT 0x04
|
||||
#define EP_AUDIO_IN 0x86
|
||||
|
||||
/* --- USB Control Message Protocol --- */
|
||||
#define RT_H2D_CLASS_EP (USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT)
|
||||
#define RT_D2H_CLASS_EP (USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT)
|
||||
#define RT_H2D_VENDOR_DEV (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE)
|
||||
#define RT_D2H_VENDOR_DEV (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE)
|
||||
|
||||
enum uac_request {
|
||||
UAC_SET_CUR = 0x01,
|
||||
UAC_GET_CUR = 0x81,
|
||||
};
|
||||
|
||||
enum uac_control_selector {
|
||||
UAC_SAMPLING_FREQ_CONTROL = 0x0100,
|
||||
};
|
||||
|
||||
enum tascam_vendor_request {
|
||||
VENDOR_REQ_REGISTER_WRITE = 0x41,
|
||||
VENDOR_REQ_MODE_CONTROL = 0x49,
|
||||
};
|
||||
|
||||
enum tascam_mode_value {
|
||||
MODE_VAL_HANDSHAKE_READ = 0x0000,
|
||||
MODE_VAL_CONFIG = 0x0010,
|
||||
MODE_VAL_STREAM_START = 0x0030,
|
||||
};
|
||||
|
||||
#define HANDSHAKE_SUCCESS_VAL 0x12
|
||||
|
||||
enum tascam_register {
|
||||
REG_ADDR_UNKNOWN_0D = 0x0d04,
|
||||
REG_ADDR_UNKNOWN_0E = 0x0e00,
|
||||
REG_ADDR_UNKNOWN_0F = 0x0f00,
|
||||
REG_ADDR_RATE_44100 = 0x1000,
|
||||
REG_ADDR_RATE_48000 = 0x1002,
|
||||
REG_ADDR_RATE_88200 = 0x1008,
|
||||
REG_ADDR_RATE_96000 = 0x100a,
|
||||
REG_ADDR_UNKNOWN_11 = 0x110b,
|
||||
};
|
||||
|
||||
#define REG_VAL_ENABLE 0x0101
|
||||
|
||||
|
||||
|
||||
/* --- URB Configuration --- */
|
||||
#define NUM_PLAYBACK_URBS 8
|
||||
#define PLAYBACK_URB_PACKETS 4
|
||||
#define NUM_FEEDBACK_URBS 4
|
||||
#define MAX_FEEDBACK_PACKETS 5
|
||||
#define FEEDBACK_PACKET_SIZE 3
|
||||
#define NUM_CAPTURE_URBS 8
|
||||
#define CAPTURE_URB_SIZE 512
|
||||
#define CAPTURE_RING_BUFFER_SIZE (CAPTURE_URB_SIZE * NUM_CAPTURE_URBS * 4)
|
||||
#define NUM_MIDI_IN_URBS 4
|
||||
#define MIDI_IN_BUF_SIZE 64
|
||||
#define MIDI_IN_FIFO_SIZE (MIDI_IN_BUF_SIZE * NUM_MIDI_IN_URBS)
|
||||
#define MIDI_OUT_BUF_SIZE 64
|
||||
#define NUM_MIDI_OUT_URBS 4
|
||||
#define USB_CTRL_TIMEOUT_MS 1000
|
||||
#define FEEDBACK_SYNC_LOSS_THRESHOLD 41
|
||||
|
||||
/* --- Audio Format Configuration --- */
|
||||
#define BYTES_PER_SAMPLE 3
|
||||
#define NUM_CHANNELS 4
|
||||
#define BYTES_PER_FRAME (NUM_CHANNELS * BYTES_PER_SAMPLE)
|
||||
#define FEEDBACK_ACCUMULATOR_SIZE 128
|
||||
|
||||
/* --- Capture Decoding Defines --- */
|
||||
#define DECODED_CHANNELS_PER_FRAME 4
|
||||
#define DECODED_SAMPLE_SIZE 4
|
||||
#define FRAMES_PER_DECODE_BLOCK 8
|
||||
#define RAW_BYTES_PER_DECODE_BLOCK 512
|
||||
|
||||
/* --- Main Driver Data Structure --- */
|
||||
struct tascam_card {
|
||||
struct usb_device *dev;
|
||||
struct usb_interface *iface0;
|
||||
struct usb_interface *iface1;
|
||||
struct snd_card *card;
|
||||
struct snd_pcm *pcm;
|
||||
struct snd_rawmidi *rmidi;
|
||||
|
||||
/* Playback stream */
|
||||
struct snd_pcm_substream *playback_substream;
|
||||
struct urb *playback_urbs[NUM_PLAYBACK_URBS];
|
||||
size_t playback_urb_alloc_size;
|
||||
struct urb *feedback_urbs[NUM_FEEDBACK_URBS];
|
||||
size_t feedback_urb_alloc_size;
|
||||
atomic_t playback_active;
|
||||
u64 playback_frames_consumed;
|
||||
snd_pcm_uframes_t driver_playback_pos;
|
||||
u64 last_period_pos;
|
||||
u8 *playback_routing_buffer;
|
||||
|
||||
/* Capture stream */
|
||||
struct snd_pcm_substream *capture_substream;
|
||||
struct urb *capture_urbs[NUM_CAPTURE_URBS];
|
||||
size_t capture_urb_alloc_size;
|
||||
atomic_t capture_active;
|
||||
snd_pcm_uframes_t driver_capture_pos;
|
||||
u64 capture_frames_processed;
|
||||
u64 last_capture_period_pos;
|
||||
u8 *capture_ring_buffer;
|
||||
size_t capture_ring_buffer_read_ptr;
|
||||
size_t capture_ring_buffer_write_ptr;
|
||||
u8 *capture_decode_raw_block;
|
||||
s32 *capture_decode_dst_block;
|
||||
s32 *capture_routing_buffer;
|
||||
struct work_struct capture_work;
|
||||
struct work_struct stop_work;
|
||||
|
||||
/* MIDI streams */
|
||||
struct snd_rawmidi_substream *midi_in_substream;
|
||||
struct snd_rawmidi_substream *midi_out_substream;
|
||||
struct urb *midi_in_urbs[NUM_MIDI_IN_URBS];
|
||||
atomic_t midi_in_active;
|
||||
struct kfifo midi_in_fifo;
|
||||
struct work_struct midi_in_work;
|
||||
spinlock_t midi_in_lock;
|
||||
struct urb *midi_out_urbs[NUM_MIDI_OUT_URBS];
|
||||
atomic_t midi_out_active;
|
||||
struct work_struct midi_out_work;
|
||||
unsigned long midi_out_urbs_in_flight;
|
||||
spinlock_t midi_out_lock;
|
||||
u8 midi_running_status;
|
||||
|
||||
/* Shared state & Routing Matrix */
|
||||
spinlock_t lock;
|
||||
atomic_t active_urbs;
|
||||
int current_rate;
|
||||
unsigned int line_out_source; /* 0: Playback 1-2, 1: Playback 3-4 */
|
||||
unsigned int digital_out_source; /* 0: Playback 1-2, 1: Playback 3-4 */
|
||||
unsigned int capture_12_source; /* 0: Analog In, 1: Digital In */
|
||||
unsigned int capture_34_source; /* 0: Analog In, 1: Digital In */
|
||||
|
||||
unsigned int feedback_accumulator_pattern[FEEDBACK_ACCUMULATOR_SIZE];
|
||||
unsigned int feedback_pattern_out_idx;
|
||||
unsigned int feedback_pattern_in_idx;
|
||||
bool feedback_synced;
|
||||
unsigned int feedback_consecutive_errors;
|
||||
unsigned int feedback_urb_skip_count;
|
||||
|
||||
const unsigned int (*feedback_patterns)[8];
|
||||
unsigned int feedback_base_value;
|
||||
unsigned int feedback_max_value;
|
||||
|
||||
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;
|
||||
};
|
||||
|
||||
/* from pcm.c */
|
||||
extern const struct snd_pcm_ops tascam_playback_ops;
|
||||
extern const struct snd_pcm_ops tascam_capture_ops;
|
||||
int tascam_create_pcm(struct tascam_card *tascam);
|
||||
void tascam_free_urbs(struct tascam_card *tascam);
|
||||
int tascam_alloc_urbs(struct tascam_card *tascam);
|
||||
int us144mkii_configure_device_for_rate(struct tascam_card *tascam, int rate);
|
||||
void tascam_stop_work_handler(struct work_struct *work);
|
||||
|
||||
/* from playback.c */
|
||||
void process_playback_routing_us144mkii(struct tascam_card *tascam, const u8 *src_buffer, u8 *dst_buffer, size_t frames);
|
||||
void playback_urb_complete(struct urb *urb);
|
||||
void feedback_urb_complete(struct urb *urb);
|
||||
|
||||
/* from capture.c */
|
||||
void process_capture_routing_us144mkii(struct tascam_card *tascam, const s32 *decoded_block, s32 *routed_block);
|
||||
void decode_tascam_capture_block(const u8 *src_block, s32 *dst_block);
|
||||
void tascam_capture_work_handler(struct work_struct *work);
|
||||
void capture_urb_complete(struct urb *urb);
|
||||
|
||||
/* from controls.c */
|
||||
int tascam_create_controls(struct tascam_card *tascam);
|
||||
|
||||
/* from midi.c */
|
||||
int tascam_create_midi(struct tascam_card *tascam);
|
||||
void tascam_midi_in_work_handler(struct work_struct *work);
|
||||
void tascam_midi_out_work_handler(struct work_struct *work);
|
||||
void tascam_midi_in_urb_complete(struct urb *urb);
|
||||
void tascam_midi_out_urb_complete(struct urb *urb);
|
||||
|
||||
#endif /* __US144MKII_H */
|
||||
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Reference in New Issue