| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (c) 2006-2008 Daniel Mack, Karsten Wiese |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/spinlock.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/usb.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| |
| #include "device.h" |
| #include "audio.h" |
| |
| #define N_URBS 32 |
| #define CLOCK_DRIFT_TOLERANCE 5 |
| #define FRAMES_PER_URB 8 |
| #define BYTES_PER_FRAME 512 |
| #define CHANNELS_PER_STREAM 2 |
| #define BYTES_PER_SAMPLE 3 |
| #define BYTES_PER_SAMPLE_USB 4 |
| #define MAX_BUFFER_SIZE (128*1024) |
| #define MAX_ENDPOINT_SIZE 512 |
| |
| #define ENDPOINT_CAPTURE 2 |
| #define ENDPOINT_PLAYBACK 6 |
| |
| #define MAKE_CHECKBYTE(cdev,stream,i) \ |
| (stream << 1) | (~(i / (cdev->n_streams * BYTES_PER_SAMPLE_USB)) & 1) |
| |
| static const struct snd_pcm_hardware snd_usb_caiaq_pcm_hardware = { |
| .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_BLOCK_TRANSFER), |
| .formats = SNDRV_PCM_FMTBIT_S24_3BE, |
| .rates = (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | |
| SNDRV_PCM_RATE_96000), |
| .rate_min = 44100, |
| .rate_max = 0, /* will overwrite later */ |
| .channels_min = CHANNELS_PER_STREAM, |
| .channels_max = CHANNELS_PER_STREAM, |
| .buffer_bytes_max = MAX_BUFFER_SIZE, |
| .period_bytes_min = 128, |
| .period_bytes_max = MAX_BUFFER_SIZE, |
| .periods_min = 1, |
| .periods_max = 1024, |
| }; |
| |
| static void |
| activate_substream(struct snd_usb_caiaqdev *cdev, |
| struct snd_pcm_substream *sub) |
| { |
| spin_lock(&cdev->spinlock); |
| |
| if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| cdev->sub_playback[sub->number] = sub; |
| else |
| cdev->sub_capture[sub->number] = sub; |
| |
| spin_unlock(&cdev->spinlock); |
| } |
| |
| static void |
| deactivate_substream(struct snd_usb_caiaqdev *cdev, |
| struct snd_pcm_substream *sub) |
| { |
| unsigned long flags; |
| spin_lock_irqsave(&cdev->spinlock, flags); |
| |
| if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| cdev->sub_playback[sub->number] = NULL; |
| else |
| cdev->sub_capture[sub->number] = NULL; |
| |
| spin_unlock_irqrestore(&cdev->spinlock, flags); |
| } |
| |
| static int |
| all_substreams_zero(struct snd_pcm_substream **subs) |
| { |
| int i; |
| for (i = 0; i < MAX_STREAMS; i++) |
| if (subs[i] != NULL) |
| return 0; |
| return 1; |
| } |
| |
| static int stream_start(struct snd_usb_caiaqdev *cdev) |
| { |
| int i, ret; |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| dev_dbg(dev, "%s(%p)\n", __func__, cdev); |
| |
| if (cdev->streaming) |
| return -EINVAL; |
| |
| memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback)); |
| memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture)); |
| cdev->input_panic = 0; |
| cdev->output_panic = 0; |
| cdev->first_packet = 4; |
| cdev->streaming = 1; |
| cdev->warned = 0; |
| |
| for (i = 0; i < N_URBS; i++) { |
| ret = usb_submit_urb(cdev->data_urbs_in[i], GFP_ATOMIC); |
| if (ret) { |
| dev_err(dev, "unable to trigger read #%d! (ret %d)\n", |
| i, ret); |
| cdev->streaming = 0; |
| return -EPIPE; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void stream_stop(struct snd_usb_caiaqdev *cdev) |
| { |
| int i; |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| dev_dbg(dev, "%s(%p)\n", __func__, cdev); |
| if (!cdev->streaming) |
| return; |
| |
| cdev->streaming = 0; |
| |
| for (i = 0; i < N_URBS; i++) { |
| usb_kill_urb(cdev->data_urbs_in[i]); |
| |
| if (test_bit(i, &cdev->outurb_active_mask)) |
| usb_kill_urb(cdev->data_urbs_out[i]); |
| } |
| |
| cdev->outurb_active_mask = 0; |
| } |
| |
| static int snd_usb_caiaq_substream_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream); |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| dev_dbg(dev, "%s(%p)\n", __func__, substream); |
| substream->runtime->hw = cdev->pcm_info; |
| snd_pcm_limit_hw_rates(substream->runtime); |
| |
| return 0; |
| } |
| |
| static int snd_usb_caiaq_substream_close(struct snd_pcm_substream *substream) |
| { |
| struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream); |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| dev_dbg(dev, "%s(%p)\n", __func__, substream); |
| if (all_substreams_zero(cdev->sub_playback) && |
| all_substreams_zero(cdev->sub_capture)) { |
| /* when the last client has stopped streaming, |
| * all sample rates are allowed again */ |
| stream_stop(cdev); |
| cdev->pcm_info.rates = cdev->samplerates; |
| } |
| |
| return 0; |
| } |
| |
| static int snd_usb_caiaq_pcm_hw_free(struct snd_pcm_substream *sub) |
| { |
| struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub); |
| deactivate_substream(cdev, sub); |
| return 0; |
| } |
| |
| static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream) |
| { |
| int bytes_per_sample, bpp, ret; |
| int index = substream->number; |
| struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(substream); |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| dev_dbg(dev, "%s(%p)\n", __func__, substream); |
| |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| int out_pos; |
| |
| switch (cdev->spec.data_alignment) { |
| case 0: |
| case 2: |
| out_pos = BYTES_PER_SAMPLE + 1; |
| break; |
| case 3: |
| default: |
| out_pos = 0; |
| break; |
| } |
| |
| cdev->period_out_count[index] = out_pos; |
| cdev->audio_out_buf_pos[index] = out_pos; |
| } else { |
| int in_pos; |
| |
| switch (cdev->spec.data_alignment) { |
| case 0: |
| in_pos = BYTES_PER_SAMPLE + 2; |
| break; |
| case 2: |
| in_pos = BYTES_PER_SAMPLE; |
| break; |
| case 3: |
| default: |
| in_pos = 0; |
| break; |
| } |
| |
| cdev->period_in_count[index] = in_pos; |
| cdev->audio_in_buf_pos[index] = in_pos; |
| } |
| |
| if (cdev->streaming) |
| return 0; |
| |
| /* the first client that opens a stream defines the sample rate |
| * setting for all subsequent calls, until the last client closed. */ |
| cdev->pcm_info.rates = snd_pcm_rate_to_rate_bit(runtime->rate); |
| snd_pcm_limit_hw_rates(runtime); |
| |
| bytes_per_sample = BYTES_PER_SAMPLE; |
| if (cdev->spec.data_alignment >= 2) |
| bytes_per_sample++; |
| |
| bpp = ((runtime->rate / 8000) + CLOCK_DRIFT_TOLERANCE) |
| * bytes_per_sample * CHANNELS_PER_STREAM * cdev->n_streams; |
| |
| if (bpp > MAX_ENDPOINT_SIZE) |
| bpp = MAX_ENDPOINT_SIZE; |
| |
| ret = snd_usb_caiaq_set_audio_params(cdev, runtime->rate, |
| runtime->sample_bits, bpp); |
| if (ret) |
| return ret; |
| |
| ret = stream_start(cdev); |
| if (ret) |
| return ret; |
| |
| cdev->output_running = 0; |
| wait_event_timeout(cdev->prepare_wait_queue, cdev->output_running, HZ); |
| if (!cdev->output_running) { |
| stream_stop(cdev); |
| return -EPIPE; |
| } |
| |
| return 0; |
| } |
| |
| static int snd_usb_caiaq_pcm_trigger(struct snd_pcm_substream *sub, int cmd) |
| { |
| struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub); |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| dev_dbg(dev, "%s(%p) cmd %d\n", __func__, sub, cmd); |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| activate_substream(cdev, sub); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| deactivate_substream(cdev, sub); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static snd_pcm_uframes_t |
| snd_usb_caiaq_pcm_pointer(struct snd_pcm_substream *sub) |
| { |
| int index = sub->number; |
| struct snd_usb_caiaqdev *cdev = snd_pcm_substream_chip(sub); |
| snd_pcm_uframes_t ptr; |
| |
| spin_lock(&cdev->spinlock); |
| |
| if (cdev->input_panic || cdev->output_panic) { |
| ptr = SNDRV_PCM_POS_XRUN; |
| goto unlock; |
| } |
| |
| if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| ptr = bytes_to_frames(sub->runtime, |
| cdev->audio_out_buf_pos[index]); |
| else |
| ptr = bytes_to_frames(sub->runtime, |
| cdev->audio_in_buf_pos[index]); |
| |
| unlock: |
| spin_unlock(&cdev->spinlock); |
| return ptr; |
| } |
| |
| /* operators for both playback and capture */ |
| static const struct snd_pcm_ops snd_usb_caiaq_ops = { |
| .open = snd_usb_caiaq_substream_open, |
| .close = snd_usb_caiaq_substream_close, |
| .hw_free = snd_usb_caiaq_pcm_hw_free, |
| .prepare = snd_usb_caiaq_pcm_prepare, |
| .trigger = snd_usb_caiaq_pcm_trigger, |
| .pointer = snd_usb_caiaq_pcm_pointer, |
| }; |
| |
| static void check_for_elapsed_periods(struct snd_usb_caiaqdev *cdev, |
| struct snd_pcm_substream **subs) |
| { |
| int stream, pb, *cnt; |
| struct snd_pcm_substream *sub; |
| |
| for (stream = 0; stream < cdev->n_streams; stream++) { |
| sub = subs[stream]; |
| if (!sub) |
| continue; |
| |
| pb = snd_pcm_lib_period_bytes(sub); |
| cnt = (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
| &cdev->period_out_count[stream] : |
| &cdev->period_in_count[stream]; |
| |
| if (*cnt >= pb) { |
| snd_pcm_period_elapsed(sub); |
| *cnt %= pb; |
| } |
| } |
| } |
| |
| static void read_in_urb_mode0(struct snd_usb_caiaqdev *cdev, |
| const struct urb *urb, |
| const struct usb_iso_packet_descriptor *iso) |
| { |
| unsigned char *usb_buf = urb->transfer_buffer + iso->offset; |
| struct snd_pcm_substream *sub; |
| int stream, i; |
| |
| if (all_substreams_zero(cdev->sub_capture)) |
| return; |
| |
| for (i = 0; i < iso->actual_length;) { |
| for (stream = 0; stream < cdev->n_streams; stream++, i++) { |
| sub = cdev->sub_capture[stream]; |
| if (sub) { |
| struct snd_pcm_runtime *rt = sub->runtime; |
| char *audio_buf = rt->dma_area; |
| int sz = frames_to_bytes(rt, rt->buffer_size); |
| audio_buf[cdev->audio_in_buf_pos[stream]++] |
| = usb_buf[i]; |
| cdev->period_in_count[stream]++; |
| if (cdev->audio_in_buf_pos[stream] == sz) |
| cdev->audio_in_buf_pos[stream] = 0; |
| } |
| } |
| } |
| } |
| |
| static void read_in_urb_mode2(struct snd_usb_caiaqdev *cdev, |
| const struct urb *urb, |
| const struct usb_iso_packet_descriptor *iso) |
| { |
| unsigned char *usb_buf = urb->transfer_buffer + iso->offset; |
| unsigned char check_byte; |
| struct snd_pcm_substream *sub; |
| int stream, i; |
| |
| for (i = 0; i < iso->actual_length;) { |
| if (i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == 0) { |
| for (stream = 0; |
| stream < cdev->n_streams; |
| stream++, i++) { |
| if (cdev->first_packet) |
| continue; |
| |
| check_byte = MAKE_CHECKBYTE(cdev, stream, i); |
| |
| if ((usb_buf[i] & 0x3f) != check_byte) |
| cdev->input_panic = 1; |
| |
| if (usb_buf[i] & 0x80) |
| cdev->output_panic = 1; |
| } |
| } |
| cdev->first_packet = 0; |
| |
| for (stream = 0; stream < cdev->n_streams; stream++, i++) { |
| sub = cdev->sub_capture[stream]; |
| if (cdev->input_panic) |
| usb_buf[i] = 0; |
| |
| if (sub) { |
| struct snd_pcm_runtime *rt = sub->runtime; |
| char *audio_buf = rt->dma_area; |
| int sz = frames_to_bytes(rt, rt->buffer_size); |
| audio_buf[cdev->audio_in_buf_pos[stream]++] = |
| usb_buf[i]; |
| cdev->period_in_count[stream]++; |
| if (cdev->audio_in_buf_pos[stream] == sz) |
| cdev->audio_in_buf_pos[stream] = 0; |
| } |
| } |
| } |
| } |
| |
| static void read_in_urb_mode3(struct snd_usb_caiaqdev *cdev, |
| const struct urb *urb, |
| const struct usb_iso_packet_descriptor *iso) |
| { |
| unsigned char *usb_buf = urb->transfer_buffer + iso->offset; |
| struct device *dev = caiaqdev_to_dev(cdev); |
| int stream, i; |
| |
| /* paranoia check */ |
| if (iso->actual_length % (BYTES_PER_SAMPLE_USB * CHANNELS_PER_STREAM)) |
| return; |
| |
| for (i = 0; i < iso->actual_length;) { |
| for (stream = 0; stream < cdev->n_streams; stream++) { |
| struct snd_pcm_substream *sub = cdev->sub_capture[stream]; |
| char *audio_buf = NULL; |
| int c, n, sz = 0; |
| |
| if (sub && !cdev->input_panic) { |
| struct snd_pcm_runtime *rt = sub->runtime; |
| audio_buf = rt->dma_area; |
| sz = frames_to_bytes(rt, rt->buffer_size); |
| } |
| |
| for (c = 0; c < CHANNELS_PER_STREAM; c++) { |
| /* 3 audio data bytes, followed by 1 check byte */ |
| if (audio_buf) { |
| for (n = 0; n < BYTES_PER_SAMPLE; n++) { |
| audio_buf[cdev->audio_in_buf_pos[stream]++] = usb_buf[i+n]; |
| |
| if (cdev->audio_in_buf_pos[stream] == sz) |
| cdev->audio_in_buf_pos[stream] = 0; |
| } |
| |
| cdev->period_in_count[stream] += BYTES_PER_SAMPLE; |
| } |
| |
| i += BYTES_PER_SAMPLE; |
| |
| if (usb_buf[i] != ((stream << 1) | c) && |
| !cdev->first_packet) { |
| if (!cdev->input_panic) |
| dev_warn(dev, " EXPECTED: %02x got %02x, c %d, stream %d, i %d\n", |
| ((stream << 1) | c), usb_buf[i], c, stream, i); |
| cdev->input_panic = 1; |
| } |
| |
| i++; |
| } |
| } |
| } |
| |
| if (cdev->first_packet > 0) |
| cdev->first_packet--; |
| } |
| |
| static void read_in_urb(struct snd_usb_caiaqdev *cdev, |
| const struct urb *urb, |
| const struct usb_iso_packet_descriptor *iso) |
| { |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| if (!cdev->streaming) |
| return; |
| |
| if (iso->actual_length < cdev->bpp) |
| return; |
| |
| switch (cdev->spec.data_alignment) { |
| case 0: |
| read_in_urb_mode0(cdev, urb, iso); |
| break; |
| case 2: |
| read_in_urb_mode2(cdev, urb, iso); |
| break; |
| case 3: |
| read_in_urb_mode3(cdev, urb, iso); |
| break; |
| } |
| |
| if ((cdev->input_panic || cdev->output_panic) && !cdev->warned) { |
| dev_warn(dev, "streaming error detected %s %s\n", |
| cdev->input_panic ? "(input)" : "", |
| cdev->output_panic ? "(output)" : ""); |
| cdev->warned = 1; |
| } |
| } |
| |
| static void fill_out_urb_mode_0(struct snd_usb_caiaqdev *cdev, |
| struct urb *urb, |
| const struct usb_iso_packet_descriptor *iso) |
| { |
| unsigned char *usb_buf = urb->transfer_buffer + iso->offset; |
| struct snd_pcm_substream *sub; |
| int stream, i; |
| |
| for (i = 0; i < iso->length;) { |
| for (stream = 0; stream < cdev->n_streams; stream++, i++) { |
| sub = cdev->sub_playback[stream]; |
| if (sub) { |
| struct snd_pcm_runtime *rt = sub->runtime; |
| char *audio_buf = rt->dma_area; |
| int sz = frames_to_bytes(rt, rt->buffer_size); |
| usb_buf[i] = |
| audio_buf[cdev->audio_out_buf_pos[stream]]; |
| cdev->period_out_count[stream]++; |
| cdev->audio_out_buf_pos[stream]++; |
| if (cdev->audio_out_buf_pos[stream] == sz) |
| cdev->audio_out_buf_pos[stream] = 0; |
| } else |
| usb_buf[i] = 0; |
| } |
| |
| /* fill in the check bytes */ |
| if (cdev->spec.data_alignment == 2 && |
| i % (cdev->n_streams * BYTES_PER_SAMPLE_USB) == |
| (cdev->n_streams * CHANNELS_PER_STREAM)) |
| for (stream = 0; stream < cdev->n_streams; stream++, i++) |
| usb_buf[i] = MAKE_CHECKBYTE(cdev, stream, i); |
| } |
| } |
| |
| static void fill_out_urb_mode_3(struct snd_usb_caiaqdev *cdev, |
| struct urb *urb, |
| const struct usb_iso_packet_descriptor *iso) |
| { |
| unsigned char *usb_buf = urb->transfer_buffer + iso->offset; |
| int stream, i; |
| |
| for (i = 0; i < iso->length;) { |
| for (stream = 0; stream < cdev->n_streams; stream++) { |
| struct snd_pcm_substream *sub = cdev->sub_playback[stream]; |
| char *audio_buf = NULL; |
| int c, n, sz = 0; |
| |
| if (sub) { |
| struct snd_pcm_runtime *rt = sub->runtime; |
| audio_buf = rt->dma_area; |
| sz = frames_to_bytes(rt, rt->buffer_size); |
| } |
| |
| for (c = 0; c < CHANNELS_PER_STREAM; c++) { |
| for (n = 0; n < BYTES_PER_SAMPLE; n++) { |
| if (audio_buf) { |
| usb_buf[i+n] = audio_buf[cdev->audio_out_buf_pos[stream]++]; |
| |
| if (cdev->audio_out_buf_pos[stream] == sz) |
| cdev->audio_out_buf_pos[stream] = 0; |
| } else { |
| usb_buf[i+n] = 0; |
| } |
| } |
| |
| if (audio_buf) |
| cdev->period_out_count[stream] += BYTES_PER_SAMPLE; |
| |
| i += BYTES_PER_SAMPLE; |
| |
| /* fill in the check byte pattern */ |
| usb_buf[i++] = (stream << 1) | c; |
| } |
| } |
| } |
| } |
| |
| static inline void fill_out_urb(struct snd_usb_caiaqdev *cdev, |
| struct urb *urb, |
| const struct usb_iso_packet_descriptor *iso) |
| { |
| switch (cdev->spec.data_alignment) { |
| case 0: |
| case 2: |
| fill_out_urb_mode_0(cdev, urb, iso); |
| break; |
| case 3: |
| fill_out_urb_mode_3(cdev, urb, iso); |
| break; |
| } |
| } |
| |
| static void read_completed(struct urb *urb) |
| { |
| struct snd_usb_caiaq_cb_info *info = urb->context; |
| struct snd_usb_caiaqdev *cdev; |
| struct device *dev; |
| struct urb *out = NULL; |
| int i, frame, len, send_it = 0, outframe = 0; |
| unsigned long flags; |
| size_t offset = 0; |
| |
| if (urb->status || !info) |
| return; |
| |
| cdev = info->cdev; |
| dev = caiaqdev_to_dev(cdev); |
| |
| if (!cdev->streaming) |
| return; |
| |
| /* find an unused output urb that is unused */ |
| for (i = 0; i < N_URBS; i++) |
| if (test_and_set_bit(i, &cdev->outurb_active_mask) == 0) { |
| out = cdev->data_urbs_out[i]; |
| break; |
| } |
| |
| if (!out) { |
| dev_err(dev, "Unable to find an output urb to use\n"); |
| goto requeue; |
| } |
| |
| /* read the recently received packet and send back one which has |
| * the same layout */ |
| for (frame = 0; frame < FRAMES_PER_URB; frame++) { |
| if (urb->iso_frame_desc[frame].status) |
| continue; |
| |
| len = urb->iso_frame_desc[outframe].actual_length; |
| out->iso_frame_desc[outframe].length = len; |
| out->iso_frame_desc[outframe].actual_length = 0; |
| out->iso_frame_desc[outframe].offset = offset; |
| offset += len; |
| |
| if (len > 0) { |
| spin_lock_irqsave(&cdev->spinlock, flags); |
| fill_out_urb(cdev, out, &out->iso_frame_desc[outframe]); |
| read_in_urb(cdev, urb, &urb->iso_frame_desc[frame]); |
| spin_unlock_irqrestore(&cdev->spinlock, flags); |
| check_for_elapsed_periods(cdev, cdev->sub_playback); |
| check_for_elapsed_periods(cdev, cdev->sub_capture); |
| send_it = 1; |
| } |
| |
| outframe++; |
| } |
| |
| if (send_it) { |
| out->number_of_packets = outframe; |
| usb_submit_urb(out, GFP_ATOMIC); |
| } else { |
| struct snd_usb_caiaq_cb_info *oinfo = out->context; |
| clear_bit(oinfo->index, &cdev->outurb_active_mask); |
| } |
| |
| requeue: |
| /* re-submit inbound urb */ |
| for (frame = 0; frame < FRAMES_PER_URB; frame++) { |
| urb->iso_frame_desc[frame].offset = BYTES_PER_FRAME * frame; |
| urb->iso_frame_desc[frame].length = BYTES_PER_FRAME; |
| urb->iso_frame_desc[frame].actual_length = 0; |
| } |
| |
| urb->number_of_packets = FRAMES_PER_URB; |
| usb_submit_urb(urb, GFP_ATOMIC); |
| } |
| |
| static void write_completed(struct urb *urb) |
| { |
| struct snd_usb_caiaq_cb_info *info = urb->context; |
| struct snd_usb_caiaqdev *cdev = info->cdev; |
| |
| if (!cdev->output_running) { |
| cdev->output_running = 1; |
| wake_up(&cdev->prepare_wait_queue); |
| } |
| |
| clear_bit(info->index, &cdev->outurb_active_mask); |
| } |
| |
| static struct urb **alloc_urbs(struct snd_usb_caiaqdev *cdev, int dir, int *ret) |
| { |
| int i, frame; |
| struct urb **urbs; |
| struct usb_device *usb_dev = cdev->chip.dev; |
| unsigned int pipe; |
| |
| pipe = (dir == SNDRV_PCM_STREAM_PLAYBACK) ? |
| usb_sndisocpipe(usb_dev, ENDPOINT_PLAYBACK) : |
| usb_rcvisocpipe(usb_dev, ENDPOINT_CAPTURE); |
| |
| urbs = kmalloc_array(N_URBS, sizeof(*urbs), GFP_KERNEL); |
| if (!urbs) { |
| *ret = -ENOMEM; |
| return NULL; |
| } |
| |
| for (i = 0; i < N_URBS; i++) { |
| urbs[i] = usb_alloc_urb(FRAMES_PER_URB, GFP_KERNEL); |
| if (!urbs[i]) { |
| *ret = -ENOMEM; |
| return urbs; |
| } |
| |
| urbs[i]->transfer_buffer = |
| kmalloc_array(BYTES_PER_FRAME, FRAMES_PER_URB, |
| GFP_KERNEL); |
| if (!urbs[i]->transfer_buffer) { |
| *ret = -ENOMEM; |
| return urbs; |
| } |
| |
| for (frame = 0; frame < FRAMES_PER_URB; frame++) { |
| struct usb_iso_packet_descriptor *iso = |
| &urbs[i]->iso_frame_desc[frame]; |
| |
| iso->offset = BYTES_PER_FRAME * frame; |
| iso->length = BYTES_PER_FRAME; |
| } |
| |
| urbs[i]->dev = usb_dev; |
| urbs[i]->pipe = pipe; |
| urbs[i]->transfer_buffer_length = FRAMES_PER_URB |
| * BYTES_PER_FRAME; |
| urbs[i]->context = &cdev->data_cb_info[i]; |
| urbs[i]->interval = 1; |
| urbs[i]->number_of_packets = FRAMES_PER_URB; |
| urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ? |
| read_completed : write_completed; |
| } |
| |
| *ret = 0; |
| return urbs; |
| } |
| |
| static void free_urbs(struct urb **urbs) |
| { |
| int i; |
| |
| if (!urbs) |
| return; |
| |
| for (i = 0; i < N_URBS; i++) { |
| if (!urbs[i]) |
| continue; |
| |
| usb_kill_urb(urbs[i]); |
| kfree(urbs[i]->transfer_buffer); |
| usb_free_urb(urbs[i]); |
| } |
| |
| kfree(urbs); |
| } |
| |
| int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *cdev) |
| { |
| int i, ret; |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| cdev->n_audio_in = max(cdev->spec.num_analog_audio_in, |
| cdev->spec.num_digital_audio_in) / |
| CHANNELS_PER_STREAM; |
| cdev->n_audio_out = max(cdev->spec.num_analog_audio_out, |
| cdev->spec.num_digital_audio_out) / |
| CHANNELS_PER_STREAM; |
| cdev->n_streams = max(cdev->n_audio_in, cdev->n_audio_out); |
| |
| dev_dbg(dev, "cdev->n_audio_in = %d\n", cdev->n_audio_in); |
| dev_dbg(dev, "cdev->n_audio_out = %d\n", cdev->n_audio_out); |
| dev_dbg(dev, "cdev->n_streams = %d\n", cdev->n_streams); |
| |
| if (cdev->n_streams > MAX_STREAMS) { |
| dev_err(dev, "unable to initialize device, too many streams.\n"); |
| return -EINVAL; |
| } |
| |
| if (cdev->n_streams < 1) { |
| dev_err(dev, "bogus number of streams: %d\n", cdev->n_streams); |
| return -EINVAL; |
| } |
| |
| ret = snd_pcm_new(cdev->chip.card, cdev->product_name, 0, |
| cdev->n_audio_out, cdev->n_audio_in, &cdev->pcm); |
| |
| if (ret < 0) { |
| dev_err(dev, "snd_pcm_new() returned %d\n", ret); |
| return ret; |
| } |
| |
| cdev->pcm->private_data = cdev; |
| strscpy(cdev->pcm->name, cdev->product_name, sizeof(cdev->pcm->name)); |
| |
| memset(cdev->sub_playback, 0, sizeof(cdev->sub_playback)); |
| memset(cdev->sub_capture, 0, sizeof(cdev->sub_capture)); |
| |
| memcpy(&cdev->pcm_info, &snd_usb_caiaq_pcm_hardware, |
| sizeof(snd_usb_caiaq_pcm_hardware)); |
| |
| /* setup samplerates */ |
| cdev->samplerates = cdev->pcm_info.rates; |
| switch (cdev->chip.usb_id) { |
| case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1): |
| case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3): |
| case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO): |
| case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE): |
| cdev->samplerates |= SNDRV_PCM_RATE_192000; |
| fallthrough; |
| case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ): |
| case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ): |
| case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ): |
| case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_TRAKTORAUDIO2): |
| cdev->samplerates |= SNDRV_PCM_RATE_88200; |
| break; |
| } |
| |
| snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_PLAYBACK, |
| &snd_usb_caiaq_ops); |
| snd_pcm_set_ops(cdev->pcm, SNDRV_PCM_STREAM_CAPTURE, |
| &snd_usb_caiaq_ops); |
| snd_pcm_set_managed_buffer_all(cdev->pcm, SNDRV_DMA_TYPE_VMALLOC, |
| NULL, 0, 0); |
| |
| cdev->data_cb_info = |
| kmalloc_array(N_URBS, sizeof(struct snd_usb_caiaq_cb_info), |
| GFP_KERNEL); |
| |
| if (!cdev->data_cb_info) |
| return -ENOMEM; |
| |
| cdev->outurb_active_mask = 0; |
| BUILD_BUG_ON(N_URBS > (sizeof(cdev->outurb_active_mask) * 8)); |
| |
| for (i = 0; i < N_URBS; i++) { |
| cdev->data_cb_info[i].cdev = cdev; |
| cdev->data_cb_info[i].index = i; |
| } |
| |
| cdev->data_urbs_in = alloc_urbs(cdev, SNDRV_PCM_STREAM_CAPTURE, &ret); |
| if (ret < 0) { |
| kfree(cdev->data_cb_info); |
| free_urbs(cdev->data_urbs_in); |
| return ret; |
| } |
| |
| cdev->data_urbs_out = alloc_urbs(cdev, SNDRV_PCM_STREAM_PLAYBACK, &ret); |
| if (ret < 0) { |
| kfree(cdev->data_cb_info); |
| free_urbs(cdev->data_urbs_in); |
| free_urbs(cdev->data_urbs_out); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| void snd_usb_caiaq_audio_disconnect(struct snd_usb_caiaqdev *cdev) |
| { |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| dev_dbg(dev, "%s(%p)\n", __func__, cdev); |
| stream_stop(cdev); |
| } |
| |
| void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *cdev) |
| { |
| struct device *dev = caiaqdev_to_dev(cdev); |
| |
| dev_dbg(dev, "%s(%p)\n", __func__, cdev); |
| free_urbs(cdev->data_urbs_in); |
| free_urbs(cdev->data_urbs_out); |
| kfree(cdev->data_cb_info); |
| } |