diff options
Diffstat (limited to 'sound/usb/ua101.c')
| -rw-r--r-- | sound/usb/ua101.c | 1387 |
1 files changed, 0 insertions, 1387 deletions
diff --git a/sound/usb/ua101.c b/sound/usb/ua101.c deleted file mode 100644 index 3d458d3b9962..000000000000 --- a/sound/usb/ua101.c +++ /dev/null @@ -1,1387 +0,0 @@ -/* - * Edirol UA-101/UA-1000 driver - * Copyright (c) Clemens Ladisch <clemens@ladisch.de> - * - * This driver is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2. - * - * This driver 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 driver. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/usb.h> -#include <linux/usb/audio.h> -#include <sound/core.h> -#include <sound/initval.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include "usbaudio.h" - -MODULE_DESCRIPTION("Edirol UA-101/1000 driver"); -MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); -MODULE_LICENSE("GPL v2"); -MODULE_SUPPORTED_DEVICE("{{Edirol,UA-101},{Edirol,UA-1000}}"); - -/* - * Should not be lower than the minimum scheduling delay of the host - * controller. Some Intel controllers need more than one frame; as long as - * that driver doesn't tell us about this, use 1.5 frames just to be sure. - */ -#define MIN_QUEUE_LENGTH 12 -/* Somewhat random. */ -#define MAX_QUEUE_LENGTH 30 -/* - * This magic value optimizes memory usage efficiency for the UA-101's packet - * sizes at all sample rates, taking into account the stupid cache pool sizes - * that usb_buffer_alloc() uses. - */ -#define DEFAULT_QUEUE_LENGTH 21 - -#define MAX_PACKET_SIZE 672 /* hardware specific */ -#define MAX_MEMORY_BUFFERS DIV_ROUND_UP(MAX_QUEUE_LENGTH, \ - PAGE_SIZE / MAX_PACKET_SIZE) - -static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; -static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; -static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; -static unsigned int queue_length = 21; - -module_param_array(index, int, NULL, 0444); -MODULE_PARM_DESC(index, "card index"); -module_param_array(id, charp, NULL, 0444); -MODULE_PARM_DESC(id, "ID string"); -module_param_array(enable, bool, NULL, 0444); -MODULE_PARM_DESC(enable, "enable card"); -module_param(queue_length, uint, 0644); -MODULE_PARM_DESC(queue_length, "USB queue length in microframes, " - __stringify(MIN_QUEUE_LENGTH)"-"__stringify(MAX_QUEUE_LENGTH)); - -enum { - INTF_PLAYBACK, - INTF_CAPTURE, - INTF_MIDI, - - INTF_COUNT -}; - -/* bits in struct ua101::states */ -enum { - USB_CAPTURE_RUNNING, - USB_PLAYBACK_RUNNING, - ALSA_CAPTURE_OPEN, - ALSA_PLAYBACK_OPEN, - ALSA_CAPTURE_RUNNING, - ALSA_PLAYBACK_RUNNING, - CAPTURE_URB_COMPLETED, - PLAYBACK_URB_COMPLETED, - DISCONNECTED, -}; - -struct ua101 { - struct usb_device *dev; - struct snd_card *card; - struct usb_interface *intf[INTF_COUNT]; - int card_index; - struct snd_pcm *pcm; - struct list_head midi_list; - u64 format_bit; - unsigned int rate; - unsigned int packets_per_second; - spinlock_t lock; - struct mutex mutex; - unsigned long states; - - /* FIFO to synchronize playback rate to capture rate */ - unsigned int rate_feedback_start; - unsigned int rate_feedback_count; - u8 rate_feedback[MAX_QUEUE_LENGTH]; - - struct list_head ready_playback_urbs; - struct tasklet_struct playback_tasklet; - wait_queue_head_t alsa_capture_wait; - wait_queue_head_t rate_feedback_wait; - wait_queue_head_t alsa_playback_wait; - struct ua101_stream { - struct snd_pcm_substream *substream; - unsigned int usb_pipe; - unsigned int channels; - unsigned int frame_bytes; - unsigned int max_packet_bytes; - unsigned int period_pos; - unsigned int buffer_pos; - unsigned int queue_length; - struct ua101_urb { - struct urb urb; - struct usb_iso_packet_descriptor iso_frame_desc[1]; - struct list_head ready_list; - } *urbs[MAX_QUEUE_LENGTH]; - struct { - unsigned int size; - void *addr; - dma_addr_t dma; - } buffers[MAX_MEMORY_BUFFERS]; - } capture, playback; -}; - -static DEFINE_MUTEX(devices_mutex); -static unsigned int devices_used; -static struct usb_driver ua101_driver; - -static void abort_alsa_playback(struct ua101 *ua); -static void abort_alsa_capture(struct ua101 *ua); - -static const char *usb_error_string(int err) -{ - switch (err) { - case -ENODEV: - return "no device"; - case -ENOENT: - return "endpoint not enabled"; - case -EPIPE: - return "endpoint stalled"; - case -ENOSPC: - return "not enough bandwidth"; - case -ESHUTDOWN: - return "device disabled"; - case -EHOSTUNREACH: - return "device suspended"; - case -EINVAL: - case -EAGAIN: - case -EFBIG: - case -EMSGSIZE: - return "internal error"; - default: - return "unknown error"; - } -} - -static void abort_usb_capture(struct ua101 *ua) -{ - if (test_and_clear_bit(USB_CAPTURE_RUNNING, &ua->states)) { - wake_up(&ua->alsa_capture_wait); - wake_up(&ua->rate_feedback_wait); - } -} - -static void abort_usb_playback(struct ua101 *ua) -{ - if (test_and_clear_bit(USB_PLAYBACK_RUNNING, &ua->states)) - wake_up(&ua->alsa_playback_wait); -} - -static void playback_urb_complete(struct urb *usb_urb) -{ - struct ua101_urb *urb = (struct ua101_urb *)usb_urb; - struct ua101 *ua = urb->urb.context; - unsigned long flags; - - if (unlikely(urb->urb.status == -ENOENT || /* unlinked */ - urb->urb.status == -ENODEV || /* device removed */ - urb->urb.status == -ECONNRESET || /* unlinked */ - urb->urb.status == -ESHUTDOWN)) { /* device disabled */ - abort_usb_playback(ua); - abort_alsa_playback(ua); - return; - } - - if (test_bit(USB_PLAYBACK_RUNNING, &ua->states)) { - /* append URB to FIFO */ - spin_lock_irqsave(&ua->lock, flags); - list_add_tail(&urb->ready_list, &ua->ready_playback_urbs); - if (ua->rate_feedback_count > 0) - tasklet_schedule(&ua->playback_tasklet); - ua->playback.substream->runtime->delay -= - urb->urb.iso_frame_desc[0].length / - ua->playback.frame_bytes; - spin_unlock_irqrestore(&ua->lock, flags); - } -} - -static void first_playback_urb_complete(struct urb *urb) -{ - struct ua101 *ua = urb->context; - - urb->complete = playback_urb_complete; - playback_urb_complete(urb); - - set_bit(PLAYBACK_URB_COMPLETED, &ua->states); - wake_up(&ua->alsa_playback_wait); -} - -/* copy data from the ALSA ring buffer into the URB buffer */ -static bool copy_playback_data(struct ua101_stream *stream, struct urb *urb, - unsigned int frames) -{ - struct snd_pcm_runtime *runtime; - unsigned int frame_bytes, frames1; - const u8 *source; - - runtime = stream->substream->runtime; - frame_bytes = stream->frame_bytes; - source = runtime->dma_area + stream->buffer_pos * frame_bytes; - if (stream->buffer_pos + frames <= runtime->buffer_size) { - memcpy(urb->transfer_buffer, source, frames * frame_bytes); - } else { - /* wrap around at end of ring buffer */ - frames1 = runtime->buffer_size - stream->buffer_pos; - memcpy(urb->transfer_buffer, source, frames1 * frame_bytes); - memcpy(urb->transfer_buffer + frames1 * frame_bytes, - runtime->dma_area, (frames - frames1) * frame_bytes); - } - - stream->buffer_pos += frames; - if (stream->buffer_pos >= runtime->buffer_size) - stream->buffer_pos -= runtime->buffer_size; - stream->period_pos += frames; - if (stream->period_pos >= runtime->period_size) { - stream->period_pos -= runtime->period_size; - return true; - } - return false; -} - -static inline void add_with_wraparound(struct ua101 *ua, - unsigned int *value, unsigned int add) -{ - *value += add; - if (*value >= ua->playback.queue_length) - *value -= ua->playback.queue_length; -} - -static void playback_tasklet(unsigned long data) -{ - struct ua101 *ua = (void *)data; - unsigned long flags; - unsigned int frames; - struct ua101_urb *urb; - bool do_period_elapsed = false; - int err; - - if (unlikely(!test_bit(USB_PLAYBACK_RUNNING, &ua->states))) - return; - - /* - * Synchronizing the playback rate to the capture rate is done by using - * the same sequence of packet sizes for both streams. - * Submitting a playback URB therefore requires both a ready URB and - * the size of the corresponding capture packet, i.e., both playback - * and capture URBs must have been completed. Since the USB core does - * not guarantee that playback and capture complete callbacks are - * called alternately, we use two FIFOs for packet sizes and read URBs; - * submitting playback URBs is possible as long as both FIFOs are - * nonempty. - */ - spin_lock_irqsave(&ua->lock, flags); - while (ua->rate_feedback_count > 0 && - !list_empty(&ua->ready_playback_urbs)) { - /* take packet size out of FIFO */ - frames = ua->rate_feedback[ua->rate_feedback_start]; - add_with_wraparound(ua, &ua->rate_feedback_start, 1); - ua->rate_feedback_count--; - - /* take URB out of FIFO */ - urb = list_first_entry(&ua->ready_playback_urbs, - struct ua101_urb, ready_list); - list_del(&urb->ready_list); - - /* fill packet with data or silence */ - urb->urb.iso_frame_desc[0].length = - frames * ua->playback.frame_bytes; - if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states)) - do_period_elapsed |= copy_playback_data(&ua->playback, - &urb->urb, - frames); - else - memset(urb->urb.transfer_buffer, 0, - urb->urb.iso_frame_desc[0].length); - - /* and off you go ... */ - err = usb_submit_urb(&urb->urb, GFP_ATOMIC); - if (unlikely(err < 0)) { - spin_unlock_irqrestore(&ua->lock, flags); - abort_usb_playback(ua); - abort_alsa_playback(ua); - dev_err(&ua->dev->dev, "USB request error %d: %s\n", - err, usb_error_string(err)); - return; - } - ua->playback.substream->runtime->delay += frames; - } - spin_unlock_irqrestore(&ua->lock, flags); - if (do_period_elapsed) - snd_pcm_period_elapsed(ua->playback.substream); -} - -/* copy data from the URB buffer into the ALSA ring buffer */ -static bool copy_capture_data(struct ua101_stream *stream, struct urb *urb, - unsigned int frames) -{ - struct snd_pcm_runtime *runtime; - unsigned int frame_bytes, frames1; - u8 *dest; - - runtime = stream->substream->runtime; - frame_bytes = stream->frame_bytes; - dest = runtime->dma_area + stream->buffer_pos * frame_bytes; - if (stream->buffer_pos + frames <= runtime->buffer_size) { - memcpy(dest, urb->transfer_buffer, frames * frame_bytes); - } else { - /* wrap around at end of ring buffer */ - frames1 = runtime->buffer_size - stream->buffer_pos; - memcpy(dest, urb->transfer_buffer, frames1 * frame_bytes); - memcpy(runtime->dma_area, - urb->transfer_buffer + frames1 * frame_bytes, - (frames - frames1) * frame_bytes); - } - - stream->buffer_pos += frames; - if (stream->buffer_pos >= runtime->buffer_size) - stream->buffer_pos -= runtime->buffer_size; - stream->period_pos += frames; - if (stream->period_pos >= runtime->period_size) { - stream->period_pos -= runtime->period_size; - return true; - } - return false; -} - -static void capture_urb_complete(struct urb *urb) -{ - struct ua101 *ua = urb->context; - struct ua101_stream *stream = &ua->capture; - unsigned long flags; - unsigned int frames, write_ptr; - bool do_period_elapsed; - int err; - - if (unlikely(urb->status == -ENOENT || /* unlinked */ - urb->status == -ENODEV || /* device removed */ - urb->status == -ECONNRESET || /* unlinked */ - urb->status == -ESHUTDOWN)) /* device disabled */ - goto stream_stopped; - - if (urb->status >= 0 && urb->iso_frame_desc[0].status >= 0) - frames = urb->iso_frame_desc[0].actual_length / - stream->frame_bytes; - else - frames = 0; - - spin_lock_irqsave(&ua->lock, flags); - - if (frames > 0 && test_bit(ALSA_CAPTURE_RUNNING, &ua->states)) - do_period_elapsed = copy_capture_data(stream, urb, frames); - else - do_period_elapsed = false; - - if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) { - err = usb_submit_urb(urb, GFP_ATOMIC); - if (unlikely(err < 0)) { - spin_unlock_irqrestore(&ua->lock, flags); - dev_err(&ua->dev->dev, "USB request error %d: %s\n", - err, usb_error_string(err)); - goto stream_stopped; - } - - /* append packet size to FIFO */ - write_ptr = ua->rate_feedback_start; - add_with_wraparound(ua, &write_ptr, ua->rate_feedback_count); - ua->rate_feedback[write_ptr] = frames; - if (ua->rate_feedback_count < ua->playback.queue_length) { - ua->rate_feedback_count++; - if (ua->rate_feedback_count == - ua->playback.queue_length) - wake_up(&ua->rate_feedback_wait); - } else { - /* - * Ring buffer overflow; this happens when the playback - * stream is not running. Throw away the oldest entry, - * so that the playback stream, when it starts, sees - * the most recent packet sizes. - */ - add_with_wraparound(ua, &ua->rate_feedback_start, 1); - } - if (test_bit(USB_PLAYBACK_RUNNING, &ua->states) && - !list_empty(&ua->ready_playback_urbs)) - tasklet_schedule(&ua->playback_tasklet); - } - - spin_unlock_irqrestore(&ua->lock, flags); - - if (do_period_elapsed) - snd_pcm_period_elapsed(stream->substream); - - return; - -stream_stopped: - abort_usb_playback(ua); - abort_usb_capture(ua); - abort_alsa_playback(ua); - abort_alsa_capture(ua); -} - -static void first_capture_urb_complete(struct urb *urb) -{ - struct ua101 *ua = urb->context; - - urb->complete = capture_urb_complete; - capture_urb_complete(urb); - - set_bit(CAPTURE_URB_COMPLETED, &ua->states); - wake_up(&ua->alsa_capture_wait); -} - -static int submit_stream_urbs(struct ua101 *ua, struct ua101_stream *stream) -{ - unsigned int i; - - for (i = 0; i < stream->queue_length; ++i) { - int err = usb_submit_urb(&stream->urbs[i]->urb, GFP_KERNEL); - if (err < 0) { - dev_err(&ua->dev->dev, "USB request error %d: %s\n", - err, usb_error_string(err)); - return err; - } - } - return 0; -} - -static void kill_stream_urbs(struct ua101_stream *stream) -{ - unsigned int i; - - for (i = 0; i < stream->queue_length; ++i) - usb_kill_urb(&stream->urbs[i]->urb); -} - -static int enable_iso_interface(struct ua101 *ua, unsigned int intf_index) -{ - struct usb_host_interface *alts; - - alts = ua->intf[intf_index]->cur_altsetting; - if (alts->desc.bAlternateSetting != 1) { - int err = usb_set_interface(ua->dev, - alts->desc.bInterfaceNumber, 1); - if (err < 0) { - dev_err(&ua->dev->dev, - "cannot initialize interface; error %d: %s\n", - err, usb_error_string(err)); - return err; - } - } - return 0; -} - -static void disable_iso_interface(struct ua101 *ua, unsigned int intf_index) -{ - struct usb_host_interface *alts; - - alts = ua->intf[intf_index]->cur_altsetting; - if (alts->desc.bAlternateSetting != 0) { - int err = usb_set_interface(ua->dev, - alts->desc.bInterfaceNumber, 0); - if (err < 0 && !test_bit(DISCONNECTED, &ua->states)) - dev_warn(&ua->dev->dev, - "interface reset failed; error %d: %s\n", - err, usb_error_string(err)); - } -} - -static void stop_usb_capture(struct ua101 *ua) -{ - clear_bit(USB_CAPTURE_RUNNING, &ua->states); - - kill_stream_urbs(&ua->capture); - - disable_iso_interface(ua, INTF_CAPTURE); -} - -static int start_usb_capture(struct ua101 *ua) -{ - int err; - - if (test_bit(DISCONNECTED, &ua->states)) - return -ENODEV; - - if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) - return 0; - - kill_stream_urbs(&ua->capture); - - err = enable_iso_interface(ua, INTF_CAPTURE); - if (err < 0) - return err; - - clear_bit(CAPTURE_URB_COMPLETED, &ua->states); - ua->capture.urbs[0]->urb.complete = first_capture_urb_complete; - ua->rate_feedback_start = 0; - ua->rate_feedback_count = 0; - - set_bit(USB_CAPTURE_RUNNING, &ua->states); - err = submit_stream_urbs(ua, &ua->capture); - if (err < 0) - stop_usb_capture(ua); - return err; -} - -static void stop_usb_playback(struct ua101 *ua) -{ - clear_bit(USB_PLAYBACK_RUNNING, &ua->states); - - kill_stream_urbs(&ua->playback); - - tasklet_kill(&ua->playback_tasklet); - - disable_iso_interface(ua, INTF_PLAYBACK); -} - -static int start_usb_playback(struct ua101 *ua) -{ - unsigned int i, frames; - struct urb *urb; - int err = 0; - - if (test_bit(DISCONNECTED, &ua->states)) - return -ENODEV; - - if (test_bit(USB_PLAYBACK_RUNNING, &ua->states)) - return 0; - - kill_stream_urbs(&ua->playback); - tasklet_kill(&ua->playback_tasklet); - - err = enable_iso_interface(ua, INTF_PLAYBACK); - if (err < 0) - return err; - - clear_bit(PLAYBACK_URB_COMPLETED, &ua->states); - ua->playback.urbs[0]->urb.complete = - first_playback_urb_complete; - spin_lock_irq(&ua->lock); - INIT_LIST_HEAD(&ua->ready_playback_urbs); - spin_unlock_irq(&ua->lock); - - /* - * We submit the initial URBs all at once, so we have to wait for the - * packet size FIFO to be full. - */ - wait_event(ua->rate_feedback_wait, - ua->rate_feedback_count >= ua->playback.queue_length || - !test_bit(USB_CAPTURE_RUNNING, &ua->states) || - test_bit(DISCONNECTED, &ua->states)); - if (test_bit(DISCONNECTED, &ua->states)) { - stop_usb_playback(ua); - return -ENODEV; - } - if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) { - stop_usb_playback(ua); - return -EIO; - } - - for (i = 0; i < ua->playback.queue_length; ++i) { - /* all initial URBs contain silence */ - spin_lock_irq(&ua->lock); - frames = ua->rate_feedback[ua->rate_feedback_start]; - add_with_wraparound(ua, &ua->rate_feedback_start, 1); - ua->rate_feedback_count--; - spin_unlock_irq(&ua->lock); - urb = &ua->playback.urbs[i]->urb; - urb->iso_frame_desc[0].length = - frames * ua->playback.frame_bytes; - memset(urb->transfer_buffer, 0, - urb->iso_frame_desc[0].length); - } - - set_bit(USB_PLAYBACK_RUNNING, &ua->states); - err = submit_stream_urbs(ua, &ua->playback); - if (err < 0) - stop_usb_playback(ua); - return err; -} - -static void abort_alsa_capture(struct ua101 *ua) -{ - if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states)) - snd_pcm_stop(ua->capture.substream, SNDRV_PCM_STATE_XRUN); -} - -static void abort_alsa_playback(struct ua101 *ua) -{ - if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states)) - snd_pcm_stop(ua->playback.substream, SNDRV_PCM_STATE_XRUN); -} - -static int set_stream_hw(struct ua101 *ua, struct snd_pcm_substream *substream, - unsigned int channels) -{ - int err; - - substream->runtime->hw.info = - SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_MMAP_VALID | - SNDRV_PCM_INFO_BATCH | - SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_BLOCK_TRANSFER | - SNDRV_PCM_INFO_FIFO_IN_FRAMES; - substream->runtime->hw.formats = ua->format_bit; - substream->runtime->hw.rates = snd_pcm_rate_to_rate_bit(ua->rate); - substream->runtime->hw.rate_min = ua->rate; - substream->runtime->hw.rate_max = ua->rate; - substream->runtime->hw.channels_min = channels; - substream->runtime->hw.channels_max = channels; - substream->runtime->hw.buffer_bytes_max = 45000 * 1024; - substream->runtime->hw.period_bytes_min = 1; - substream->runtime->hw.period_bytes_max = UINT_MAX; - substream->runtime->hw.periods_min = 2; - substream->runtime->hw.periods_max = UINT_MAX; - err = snd_pcm_hw_constraint_minmax(substream->runtime, - SNDRV_PCM_HW_PARAM_PERIOD_TIME, - 1500000 / ua->packets_per_second, - 8192000); - if (err < 0) - return err; - err = snd_pcm_hw_constraint_msbits(substream->runtime, 0, 32, 24); - return err; -} - -static int capture_pcm_open(struct snd_pcm_substream *substream) -{ - struct ua101 *ua = substream->private_data; - int err; - - ua->capture.substream = substream; - err = set_stream_hw(ua, substream, ua->capture.channels); - if (err < 0) - return err; - substream->runtime->hw.fifo_size = - DIV_ROUND_CLOSEST(ua->rate, ua->packets_per_second); - substream->runtime->delay = substream->runtime->hw.fifo_size; - - mutex_lock(&ua->mutex); - err = start_usb_capture(ua); - if (err >= 0) - set_bit(ALSA_CAPTURE_OPEN, &ua->states); - mutex_unlock(&ua->mutex); - return err; -} - -static int playback_pcm_open(struct snd_pcm_substream *substream) -{ - struct ua101 *ua = substream->private_data; - int err; - - ua->playback.substream = substream; - err = set_stream_hw(ua, substream, ua->playback.channels); - if (err < 0) - return err; - substream->runtime->hw.fifo_size = - DIV_ROUND_CLOSEST(ua->rate * ua->playback.queue_length, - ua->packets_per_second); - - mutex_lock(&ua->mutex); - err = start_usb_capture(ua); - if (err < 0) - goto error; - err = start_usb_playback(ua); - if (err < 0) { - if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states)) - stop_usb_capture(ua); - goto error; - } - set_bit(ALSA_PLAYBACK_OPEN, &ua->states); -error: - mutex_unlock(&ua->mutex); - return err; -} - -static int capture_pcm_close(struct snd_pcm_substream *substream) -{ - struct ua101 *ua = substream->private_data; - - mutex_lock(&ua->mutex); - clear_bit(ALSA_CAPTURE_OPEN, &ua->states); - if (!test_bit(ALSA_PLAYBACK_OPEN, &ua->states)) - stop_usb_capture(ua); - mutex_unlock(&ua->mutex); - return 0; -} - -static int playback_pcm_close(struct snd_pcm_substream *substream) -{ - struct ua101 *ua = substream->private_data; - - mutex_lock(&ua->mutex); - stop_usb_playback(ua); - clear_bit(ALSA_PLAYBACK_OPEN, &ua->states); - if (!test_bit(ALSA_CAPTURE_OPEN, &ua->states)) - stop_usb_capture(ua); - mutex_unlock(&ua->mutex); - return 0; -} - -static int capture_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) -{ - struct ua101 *ua = substream->private_data; - int err; - - mutex_lock(&ua->mutex); - err = start_usb_capture(ua); - mutex_unlock(&ua->mutex); - if (err < 0) - return err; - - return snd_pcm_lib_alloc_vmalloc_buffer(substream, - params_buffer_bytes(hw_params)); -} - -static int playback_pcm_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) -{ - struct ua101 *ua = substream->private_data; - int err; - - mutex_lock(&ua->mutex); - err = start_usb_capture(ua); - if (err >= 0) - err = start_usb_playback(ua); - mutex_unlock(&ua->mutex); - if (err < 0) - return err; - - return snd_pcm_lib_alloc_vmalloc_buffer(substream, - params_buffer_bytes(hw_params)); -} - -static int ua101_pcm_hw_free(struct snd_pcm_substream *substream) -{ - return snd_pcm_lib_free_vmalloc_buffer(substream); -} - -static int capture_pcm_prepare(struct snd_pcm_substream *substream) -{ - struct ua101 *ua = substream->private_data; - int err; - - mutex_lock(&ua->mutex); - err = start_usb_capture(ua); - mutex_unlock(&ua->mutex); - if (err < 0) - return err; - - /* - * The EHCI driver schedules the first packet of an iso stream at 10 ms - * in the future, i.e., no data is actually captured for that long. - * Take the wait here so that the stream is known to be actually - * running when the start trigger has been called. - */ - wait_event(ua->alsa_capture_wait, - test_bit(CAPTURE_URB_COMPLETED, &ua->states) || - !test_bit(USB_CAPTURE_RUNNING, &ua->states)); - if (test_bit(DISCONNECTED, &ua->states)) - return -ENODEV; - if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) - return -EIO; - - ua->capture.period_pos = 0; - ua->capture.buffer_pos = 0; - return 0; -} - -static int playback_pcm_prepare(struct snd_pcm_substream *substream) -{ - struct ua101 *ua = substream->private_data; - int err; - - mutex_lock(&ua->mutex); - err = start_usb_capture(ua); - if (err >= 0) - err = start_usb_playback(ua); - mutex_unlock(&ua->mutex); - if (err < 0) - return err; - - /* see the comment in capture_pcm_prepare() */ - wait_event(ua->alsa_playback_wait, - test_bit(PLAYBACK_URB_COMPLETED, &ua->states) || - !test_bit(USB_PLAYBACK_RUNNING, &ua->states)); - if (test_bit(DISCONNECTED, &ua->states)) - return -ENODEV; - if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states)) - return -EIO; - - substream->runtime->delay = 0; - ua->playback.period_pos = 0; - ua->playback.buffer_pos = 0; - return 0; -} - -static int capture_pcm_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct ua101 *ua = substream->private_data; - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - if (!test_bit(USB_CAPTURE_RUNNING, &ua->states)) - return -EIO; - set_bit(ALSA_CAPTURE_RUNNING, &ua->states); - return 0; - case SNDRV_PCM_TRIGGER_STOP: - clear_bit(ALSA_CAPTURE_RUNNING, &ua->states); - return 0; - default: - return -EINVAL; - } -} - -static int playback_pcm_trigger(struct snd_pcm_substream *substream, int cmd) -{ - struct ua101 *ua = substream->private_data; - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - if (!test_bit(USB_PLAYBACK_RUNNING, &ua->states)) - return -EIO; - set_bit(ALSA_PLAYBACK_RUNNING, &ua->states); - return 0; - case SNDRV_PCM_TRIGGER_STOP: - clear_bit(ALSA_PLAYBACK_RUNNING, &ua->states); - return 0; - default: - return -EINVAL; - } -} - -static inline snd_pcm_uframes_t ua101_pcm_pointer(struct ua101 *ua, - struct ua101_stream *stream) -{ - unsigned long flags; - unsigned int pos; - - spin_lock_irqsave(&ua->lock, flags); - pos = stream->buffer_pos; - spin_unlock_irqrestore(&ua->lock, flags); - return pos; -} - -static snd_pcm_uframes_t capture_pcm_pointer(struct snd_pcm_substream *subs) -{ - struct ua101 *ua = subs->private_data; - - return ua101_pcm_pointer(ua, &ua->capture); -} - -static snd_pcm_uframes_t playback_pcm_pointer(struct snd_pcm_substream *subs) -{ - struct ua101 *ua = subs->private_data; - - return ua101_pcm_pointer(ua, &ua->playback); -} - -static struct snd_pcm_ops capture_pcm_ops = { - .open = capture_pcm_open, - .close = capture_pcm_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = capture_pcm_hw_params, - .hw_free = ua101_pcm_hw_free, - .prepare = capture_pcm_prepare, - .trigger = capture_pcm_trigger, - .pointer = capture_pcm_pointer, - .page = snd_pcm_lib_get_vmalloc_page, - .mmap = snd_pcm_lib_mmap_vmalloc, -}; - -static struct snd_pcm_ops playback_pcm_ops = { - .open = playback_pcm_open, - .close = playback_pcm_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = playback_pcm_hw_params, - .hw_free = ua101_pcm_hw_free, - .prepare = playback_pcm_prepare, - .trigger = playback_pcm_trigger, - .pointer = playback_pcm_pointer, - .page = snd_pcm_lib_get_vmalloc_page, - .mmap = snd_pcm_lib_mmap_vmalloc, -}; - -static const struct uac_format_type_i_discrete_descriptor * -find_format_descriptor(struct usb_interface *interface) -{ - struct usb_host_interface *alt; - u8 *extra; - int extralen; - - if (interface->num_altsetting != 2) { - dev_err(&interface->dev, "invalid num_altsetting\n"); - return NULL; - } - - alt = &interface->altsetting[0]; - if (alt->desc.bNumEndpoints != 0) { - dev_err(&interface->dev, "invalid bNumEndpoints\n"); - return NULL; - } - - alt = &interface->altsetting[1]; - if (alt->desc.bNumEndpoints != 1) { - dev_err(&interface->dev, "invalid bNumEndpoints\n"); - return NULL; - } - - extra = alt->extra; - extralen = alt->extralen; - while (extralen >= sizeof(struct usb_descriptor_header)) { - struct uac_format_type_i_discrete_descriptor *desc; - - desc = (struct uac_format_type_i_discrete_descriptor *)extra; - if (desc->bLength > extralen) { - dev_err(&interface->dev, "descriptor overflow\n"); - return NULL; - } - if (desc->bLength == UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1) && - desc->bDescriptorType == USB_DT_CS_INTERFACE && - desc->bDescriptorSubtype == UAC_FORMAT_TYPE) { - if (desc->bFormatType != UAC_FORMAT_TYPE_I_PCM || - desc->bSamFreqType != 1) { - dev_err(&interface->dev, - "invalid format type\n"); - return NULL; - } - return desc; - } - extralen -= desc->bLength; - extra += desc->bLength; - } - dev_err(&interface->dev, "sample format descriptor not found\n"); - return NULL; -} - -static int detect_usb_format(struct ua101 *ua) -{ - const struct uac_format_type_i_discrete_descriptor *fmt_capture; - const struct uac_format_type_i_discrete_descriptor *fmt_playback; - const struct usb_endpoint_descriptor *epd; - unsigned int rate2; - - fmt_capture = find_format_descriptor(ua->intf[INTF_CAPTURE]); - fmt_playback = find_format_descriptor(ua->intf[INTF_PLAYBACK]); - if (!fmt_capture || !fmt_playback) - return -ENXIO; - - switch (fmt_capture->bSubframeSize) { - case 3: - ua->format_bit = SNDRV_PCM_FMTBIT_S24_3LE; - break; - case 4: - ua->format_bit = SNDRV_PCM_FMTBIT_S32_LE; - break; - default: - dev_err(&ua->dev->dev, "sample width is not 24 or 32 bits\n"); - return -ENXIO; - } - if (fmt_capture->bSubframeSize != fmt_playback->bSubframeSize) { - dev_err(&ua->dev->dev, - "playback/capture sample widths do not match\n"); - return -ENXIO; - } - - if (fmt_capture->bBitResolution != 24 || - fmt_playback->bBitResolution != 24) { - dev_err(&ua->dev->dev, "sample width is not 24 bits\n"); - return -ENXIO; - } - - ua->rate = combine_triple(fmt_capture->tSamFreq[0]); - rate2 = combine_triple(fmt_playback->tSamFreq[0]); - if (ua->rate != rate2) { - dev_err(&ua->dev->dev, - "playback/capture rates do not match: %u/%u\n", - rate2, ua->rate); - return -ENXIO; - } - - switch (ua->dev->speed) { - case USB_SPEED_FULL: - ua->packets_per_second = 1000; - break; - case USB_SPEED_HIGH: - ua->packets_per_second = 8000; - break; - default: - dev_err(&ua->dev->dev, "unknown device speed\n"); - return -ENXIO; - } - - ua->capture.channels = fmt_capture->bNrChannels; - ua->playback.channels = fmt_playback->bNrChannels; - ua->capture.frame_bytes = - fmt_capture->bSubframeSize * ua->capture.channels; - ua->playback.frame_bytes = - fmt_playback->bSubframeSize * ua->playback.channels; - - epd = &ua->intf[INTF_CAPTURE]->altsetting[1].endpoint[0].desc; - if (!usb_endpoint_is_isoc_in(epd)) { - dev_err(&ua->dev->dev, "invalid capture endpoint\n"); - return -ENXIO; - } - ua->capture.usb_pipe = usb_rcvisocpipe(ua->dev, usb_endpoint_num(epd)); - ua->capture.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize); - - epd = &ua->intf[INTF_PLAYBACK]->altsetting[1].endpoint[0].desc; - if (!usb_endpoint_is_isoc_out(epd)) { - dev_err(&ua->dev->dev, "invalid playback endpoint\n"); - return -ENXIO; - } - ua->playback.usb_pipe = usb_sndisocpipe(ua->dev, usb_endpoint_num(epd)); - ua->playback.max_packet_bytes = le16_to_cpu(epd->wMaxPacketSize); - return 0; -} - -static int alloc_stream_buffers(struct ua101 *ua, struct ua101_stream *stream) -{ - unsigned int remaining_packets, packets, packets_per_page, i; - size_t size; - - stream->queue_length = queue_length; - stream->queue_length = max(stream->queue_length, - (unsigned int)MIN_QUEUE_LENGTH); - stream->queue_length = min(stream->queue_length, - (unsigned int)MAX_QUEUE_LENGTH); - - /* - * The cache pool sizes used by usb_buffer_alloc() (128, 512, 2048) are - * quite bad when used with the packet sizes of this device (e.g. 280, - * 520, 624). Therefore, we allocate and subdivide entire pages, using - * a smaller buffer only for the last chunk. - */ - remaining_packets = stream->queue_length; - packets_per_page = PAGE_SIZE / stream->max_packet_bytes; - for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i) { - packets = min(remaining_packets, packets_per_page); - size = packets * stream->max_packet_bytes; - stream->buffers[i].addr = - usb_buffer_alloc(ua->dev, size, GFP_KERNEL, - &stream->buffers[i].dma); - if (!stream->buffers[i].addr) - return -ENOMEM; - stream->buffers[i].size = size; - remaining_packets -= packets; - if (!remaining_packets) - break; - } - if (remaining_packets) { - dev_err(&ua->dev->dev, "too many packets\n"); - return -ENXIO; - } - return 0; -} - -static void free_stream_buffers(struct ua101 *ua, struct ua101_stream *stream) -{ - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(stream->buffers); ++i) - usb_buffer_free(ua->dev, - stream->buffers[i].size, - stream->buffers[i].addr, - stream->buffers[i].dma); -} - -static int alloc_stream_urbs(struct ua101 *ua, struct ua101_stream *stream, - void (*urb_complete)(struct urb *)) -{ - unsigned max_packet_size = stream->max_packet_bytes; - struct ua101_urb *urb; - unsigned int b, u = 0; - - for (b = 0; b < ARRAY_SIZE(stream->buffers); ++b) { - unsigned int size = stream->buffers[b].size; - u8 *addr = stream->buffers[b].addr; - dma_addr_t dma = stream->buffers[b].dma; - - while (size >= max_packet_size) { - if (u >= stream->queue_length) - goto bufsize_error; - urb = kmalloc(sizeof(*urb), GFP_KERNEL); - if (!urb) - return -ENOMEM; - usb_init_urb(&urb->urb); - urb->urb.dev = ua->dev; - urb->urb.pipe = stream->usb_pipe; - urb->urb.transfer_flags = URB_ISO_ASAP | - URB_NO_TRANSFER_DMA_MAP; - urb->urb.transfer_buffer = addr; - urb->urb.transfer_dma = dma; - urb->urb.transfer_buffer_length = max_packet_size; - urb->urb.number_of_packets = 1; - urb->urb.interval = 1; - urb->urb.context = ua; - urb->urb.complete = urb_complete; - urb->urb.iso_frame_desc[0].offset = 0; - urb->urb.iso_frame_desc[0].length = max_packet_size; - stream->urbs[u++] = urb; - size -= max_packet_size; - addr += max_packet_size; - dma += max_packet_size; - } - } - if (u == stream->queue_length) - return 0; -bufsize_error: - dev_err(&ua->dev->dev, "internal buffer size error\n"); - return -ENXIO; -} - -static void free_stream_urbs(struct ua101_stream *stream) -{ - unsigned int i; - - for (i = 0; i < stream->queue_length; ++i) - kfree(stream->urbs[i]); -} - -static void free_usb_related_resources(struct ua101 *ua, - struct usb_interface *interface) -{ - unsigned int i; - - free_stream_urbs(&ua->capture); - free_stream_urbs(&ua->playback); - free_stream_buffers(ua, &ua->capture); - free_stream_buffers(ua, &ua->playback); - - for (i = 0; i < ARRAY_SIZE(ua->intf); ++i) - if (ua->intf[i]) { - usb_set_intfdata(ua->intf[i], NULL); - if (ua->intf[i] != interface) - usb_driver_release_interface(&ua101_driver, - ua->intf[i]); - } -} - -static void ua101_card_free(struct snd_card *card) -{ - struct ua101 *ua = card->private_data; - - mutex_destroy(&ua->mutex); -} - -static int ua101_probe(struct usb_interface *interface, - const struct usb_device_id *usb_id) -{ - static const struct snd_usb_midi_endpoint_info midi_ep = { - .out_cables = 0x0001, - .in_cables = 0x0001 - }; - static const struct snd_usb_audio_quirk midi_quirk = { - .type = QUIRK_MIDI_FIXED_ENDPOINT, - .data = &midi_ep - }; - static const int intf_numbers[2][3] = { - { /* UA-101 */ - [INTF_PLAYBACK] = 0, - [INTF_CAPTURE] = 1, - [INTF_MIDI] = 2, - }, - { /* UA-1000 */ - [INTF_CAPTURE] = 1, - [INTF_PLAYBACK] = 2, - [INTF_MIDI] = 3, - }, - }; - struct snd_card *card; - struct ua101 *ua; - unsigned int card_index, i; - int is_ua1000; - const char *name; - char usb_path[32]; - int err; - - is_ua1000 = usb_id->idProduct == 0x0044; - - if (interface->altsetting->desc.bInterfaceNumber != - intf_numbers[is_ua1000][0]) - return -ENODEV; - - mutex_lock(&devices_mutex); - - for (card_index = 0; card_index < SNDRV_CARDS; ++card_index) - if (enable[card_index] && !(devices_used & (1 << card_index))) - break; - if (card_index >= SNDRV_CARDS) { - mutex_unlock(&devices_mutex); - return -ENOENT; - } - err = snd_card_create(index[card_index], id[card_index], THIS_MODULE, - sizeof(*ua), &card); - if (err < 0) { - mutex_unlock(&devices_mutex); - return err; - } - card->private_free = ua101_card_free; - ua = card->private_data; - ua->dev = interface_to_usbdev(interface); - ua->card = card; - ua->card_index = card_index; - INIT_LIST_HEAD(&ua->midi_list); - spin_lock_init(&ua->lock); - mutex_init(&ua->mutex); - INIT_LIST_HEAD(&ua->ready_playback_urbs); - tasklet_init(&ua->playback_tasklet, - playback_tasklet, (unsigned long)ua); - init_waitqueue_head(&ua->alsa_capture_wait); - init_waitqueue_head(&ua->rate_feedback_wait); - init_waitqueue_head(&ua->alsa_playback_wait); - - ua->intf[0] = interface; - for (i = 1; i < ARRAY_SIZE(ua->intf); ++i) { - ua->intf[i] = usb_ifnum_to_if(ua->dev, - intf_numbers[is_ua1000][i]); - if (!ua->intf[i]) { - dev_err(&ua->dev->dev, "interface %u not found\n", - intf_numbers[is_ua1000][i]); - err = -ENXIO; - goto probe_error; - } - err = usb_driver_claim_interface(&ua101_driver, - ua->intf[i], ua); - if (err < 0) { - ua->intf[i] = NULL; - err = -EBUSY; - goto probe_error; - } - } - - snd_card_set_dev(card, &interface->dev); - - err = detect_usb_format(ua); - if (err < 0) - goto probe_error; - - name = usb_id->idProduct == 0x0044 ? "UA-1000" : "UA-101"; - strcpy(card->driver, "UA-101"); - strcpy(card->shortname, name); - usb_make_path(ua->dev, usb_path, sizeof(usb_path)); - snprintf(ua->card->longname, sizeof(ua->card->longname), - "EDIROL %s (serial %s), %u Hz at %s, %s speed", name, - ua->dev->serial ? ua->dev->serial : "?", ua->rate, usb_path, - ua->dev->speed == USB_SPEED_HIGH ? "high" : "full"); - - err = alloc_stream_buffers(ua, &ua->capture); - if (err < 0) - goto probe_error; - err = alloc_stream_buffers(ua, &ua->playback); - if (err < 0) - goto probe_error; - - err = alloc_stream_urbs(ua, &ua->capture, capture_urb_complete); - if (err < 0) - goto probe_error; - err = alloc_stream_urbs(ua, &ua->playback, playback_urb_complete); - if (err < 0) - goto probe_error; - - err = snd_pcm_new(card, name, 0, 1, 1, &ua->pcm); - if (err < 0) - goto probe_error; - ua->pcm->private_data = ua; - strcpy(ua->pcm->name, name); - snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_pcm_ops); - snd_pcm_set_ops(ua->pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_pcm_ops); - - err = snd_usbmidi_create(card, ua->intf[INTF_MIDI], - &ua->midi_list, &midi_quirk); - if (err < 0) - goto probe_error; - - err = snd_card_register(card); - if (err < 0) - goto probe_error; - - usb_set_intfdata(interface, ua); - devices_used |= 1 << card_index; - - mutex_unlock(&devices_mutex); - return 0; - -probe_error: - free_usb_related_resources(ua, interface); - snd_card_free(card); - mutex_unlock(&devices_mutex); - return err; -} - -static void ua101_disconnect(struct usb_interface *interface) -{ - struct ua101 *ua = usb_get_intfdata(interface); - struct list_head *midi; - - if (!ua) - return; - - mutex_lock(&devices_mutex); - - set_bit(DISCONNECTED, &ua->states); - wake_up(&ua->rate_feedback_wait); - - /* make sure that userspace cannot create new requests */ - snd_card_disconnect(ua->card); - - /* make sure that there are no pending USB requests */ - __list_for_each(midi, &ua->midi_list) - snd_usbmidi_disconnect(midi); - abort_alsa_playback(ua); - abort_alsa_capture(ua); - mutex_lock(&ua->mutex); - stop_usb_playback(ua); - stop_usb_capture(ua); - mutex_unlock(&ua->mutex); - - free_usb_related_resources(ua, interface); - - devices_used &= ~(1 << ua->card_index); - - snd_card_free_when_closed(ua->card); - - mutex_unlock(&devices_mutex); -} - -static struct usb_device_id ua101_ids[] = { - { USB_DEVICE(0x0582, 0x0044) }, /* UA-1000 high speed */ - { USB_DEVICE(0x0582, 0x007d) }, /* UA-101 high speed */ - { USB_DEVICE(0x0582, 0x008d) }, /* UA-101 full speed */ - { } -}; -MODULE_DEVICE_TABLE(usb, ua101_ids); - -static struct usb_driver ua101_driver = { - .name = "snd-ua101", - .id_table = ua101_ids, - .probe = ua101_probe, - .disconnect = ua101_disconnect, -#if 0 - .suspend = ua101_suspend, - .resume = ua101_resume, -#endif -}; - -static int __init alsa_card_ua101_init(void) -{ - return usb_register(&ua101_driver); -} - -static void __exit alsa_card_ua101_exit(void) -{ - usb_deregister(&ua101_driver); - mutex_destroy(&devices_mutex); -} - -module_init(alsa_card_ua101_init); -module_exit(alsa_card_ua101_exit); |