diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/usb/caiaq/audio.c | 903 |
1 files changed, 903 insertions, 0 deletions
diff --git a/sound/usb/caiaq/audio.c b/sound/usb/caiaq/audio.c new file mode 100644 index 000000000..c6108a3d7 --- /dev/null +++ b/sound/usb/caiaq/audio.c @@ -0,0 +1,903 @@ +/* + * Copyright (c) 2006-2008 Daniel Mack, Karsten Wiese + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#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 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_params(struct snd_pcm_substream *sub, + struct snd_pcm_hw_params *hw_params) +{ + return snd_pcm_lib_alloc_vmalloc_buffer(sub, + params_buffer_bytes(hw_params)); +} + +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 snd_pcm_lib_free_vmalloc_buffer(sub); +} + +/* this should probably go upstream */ +#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 +#error "Change this table" +#endif + +static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100, + 48000, 64000, 88200, 96000, 176400, 192000 }; + +static int snd_usb_caiaq_pcm_prepare(struct snd_pcm_substream *substream) +{ + int bytes_per_sample, bpp, ret, i; + 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. */ + for (i=0; i < ARRAY_SIZE(rates); i++) + if (runtime->rate == rates[i]) + cdev->pcm_info.rates = 1 << i; + + 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, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = snd_usb_caiaq_pcm_hw_params, + .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, + .page = snd_pcm_lib_get_vmalloc_page, +}; + +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; + strlcpy(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; + /* fall thru */ + 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); + + 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_free(struct snd_usb_caiaqdev *cdev) +{ + struct device *dev = caiaqdev_to_dev(cdev); + + dev_dbg(dev, "%s(%p)\n", __func__, cdev); + stream_stop(cdev); + free_urbs(cdev->data_urbs_in); + free_urbs(cdev->data_urbs_out); + kfree(cdev->data_cb_info); +} + |