summaryrefslogtreecommitdiffstats
path: root/kernel/sound/usb/6fire/pcm.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/sound/usb/6fire/pcm.c')
-rw-r--r--kernel/sound/usb/6fire/pcm.c708
1 files changed, 708 insertions, 0 deletions
diff --git a/kernel/sound/usb/6fire/pcm.c b/kernel/sound/usb/6fire/pcm.c
new file mode 100644
index 000000000..36f4115eb
--- /dev/null
+++ b/kernel/sound/usb/6fire/pcm.c
@@ -0,0 +1,708 @@
+/*
+ * Linux driver for TerraTec DMX 6Fire USB
+ *
+ * PCM driver
+ *
+ * Author: Torsten Schenk <torsten.schenk@zoho.com>
+ * Created: Jan 01, 2011
+ * Copyright: (C) Torsten Schenk
+ *
+ * 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.
+ */
+
+#include "pcm.h"
+#include "chip.h"
+#include "comm.h"
+#include "control.h"
+
+enum {
+ OUT_N_CHANNELS = 6, IN_N_CHANNELS = 4
+};
+
+/* keep next two synced with
+ * FW_EP_W_MAX_PACKET_SIZE[] and RATES_MAX_PACKET_SIZE
+ * and CONTROL_RATE_XXX in control.h */
+static const int rates_in_packet_size[] = { 228, 228, 420, 420, 404, 404 };
+static const int rates_out_packet_size[] = { 228, 228, 420, 420, 604, 604 };
+static const int rates[] = { 44100, 48000, 88200, 96000, 176400, 192000 };
+static const int rates_alsaid[] = {
+ SNDRV_PCM_RATE_44100, SNDRV_PCM_RATE_48000,
+ SNDRV_PCM_RATE_88200, SNDRV_PCM_RATE_96000,
+ SNDRV_PCM_RATE_176400, SNDRV_PCM_RATE_192000 };
+
+enum { /* settings for pcm */
+ OUT_EP = 6, IN_EP = 2, MAX_BUFSIZE = 128 * 1024
+};
+
+enum { /* pcm streaming states */
+ STREAM_DISABLED, /* no pcm streaming */
+ STREAM_STARTING, /* pcm streaming requested, waiting to become ready */
+ STREAM_RUNNING, /* pcm streaming running */
+ STREAM_STOPPING
+};
+
+static const struct snd_pcm_hardware pcm_hw = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_BATCH,
+
+ .formats = SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
+
+ .rates = SNDRV_PCM_RATE_44100 |
+ SNDRV_PCM_RATE_48000 |
+ SNDRV_PCM_RATE_88200 |
+ SNDRV_PCM_RATE_96000 |
+ SNDRV_PCM_RATE_176400 |
+ SNDRV_PCM_RATE_192000,
+
+ .rate_min = 44100,
+ .rate_max = 192000,
+ .channels_min = 1,
+ .channels_max = 0, /* set in pcm_open, depending on capture/playback */
+ .buffer_bytes_max = MAX_BUFSIZE,
+ .period_bytes_min = PCM_N_PACKETS_PER_URB * (PCM_MAX_PACKET_SIZE - 4),
+ .period_bytes_max = MAX_BUFSIZE,
+ .periods_min = 2,
+ .periods_max = 1024
+};
+
+static int usb6fire_pcm_set_rate(struct pcm_runtime *rt)
+{
+ int ret;
+ struct control_runtime *ctrl_rt = rt->chip->control;
+
+ ctrl_rt->usb_streaming = false;
+ ret = ctrl_rt->update_streaming(ctrl_rt);
+ if (ret < 0) {
+ dev_err(&rt->chip->dev->dev,
+ "error stopping streaming while setting samplerate %d.\n",
+ rates[rt->rate]);
+ return ret;
+ }
+
+ ret = ctrl_rt->set_rate(ctrl_rt, rt->rate);
+ if (ret < 0) {
+ dev_err(&rt->chip->dev->dev,
+ "error setting samplerate %d.\n",
+ rates[rt->rate]);
+ return ret;
+ }
+
+ ret = ctrl_rt->set_channels(ctrl_rt, OUT_N_CHANNELS, IN_N_CHANNELS,
+ false, false);
+ if (ret < 0) {
+ dev_err(&rt->chip->dev->dev,
+ "error initializing channels while setting samplerate %d.\n",
+ rates[rt->rate]);
+ return ret;
+ }
+
+ ctrl_rt->usb_streaming = true;
+ ret = ctrl_rt->update_streaming(ctrl_rt);
+ if (ret < 0) {
+ dev_err(&rt->chip->dev->dev,
+ "error starting streaming while setting samplerate %d.\n",
+ rates[rt->rate]);
+ return ret;
+ }
+
+ rt->in_n_analog = IN_N_CHANNELS;
+ rt->out_n_analog = OUT_N_CHANNELS;
+ rt->in_packet_size = rates_in_packet_size[rt->rate];
+ rt->out_packet_size = rates_out_packet_size[rt->rate];
+ return 0;
+}
+
+static struct pcm_substream *usb6fire_pcm_get_substream(
+ struct snd_pcm_substream *alsa_sub)
+{
+ struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
+
+ if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ return &rt->playback;
+ else if (alsa_sub->stream == SNDRV_PCM_STREAM_CAPTURE)
+ return &rt->capture;
+ dev_err(&rt->chip->dev->dev, "error getting pcm substream slot.\n");
+ return NULL;
+}
+
+/* call with stream_mutex locked */
+static void usb6fire_pcm_stream_stop(struct pcm_runtime *rt)
+{
+ int i;
+ struct control_runtime *ctrl_rt = rt->chip->control;
+
+ if (rt->stream_state != STREAM_DISABLED) {
+
+ rt->stream_state = STREAM_STOPPING;
+
+ for (i = 0; i < PCM_N_URBS; i++) {
+ usb_kill_urb(&rt->in_urbs[i].instance);
+ usb_kill_urb(&rt->out_urbs[i].instance);
+ }
+ ctrl_rt->usb_streaming = false;
+ ctrl_rt->update_streaming(ctrl_rt);
+ rt->stream_state = STREAM_DISABLED;
+ }
+}
+
+/* call with stream_mutex locked */
+static int usb6fire_pcm_stream_start(struct pcm_runtime *rt)
+{
+ int ret;
+ int i;
+ int k;
+ struct usb_iso_packet_descriptor *packet;
+
+ if (rt->stream_state == STREAM_DISABLED) {
+ /* submit our in urbs */
+ rt->stream_wait_cond = false;
+ rt->stream_state = STREAM_STARTING;
+ for (i = 0; i < PCM_N_URBS; i++) {
+ for (k = 0; k < PCM_N_PACKETS_PER_URB; k++) {
+ packet = &rt->in_urbs[i].packets[k];
+ packet->offset = k * rt->in_packet_size;
+ packet->length = rt->in_packet_size;
+ packet->actual_length = 0;
+ packet->status = 0;
+ }
+ ret = usb_submit_urb(&rt->in_urbs[i].instance,
+ GFP_ATOMIC);
+ if (ret) {
+ usb6fire_pcm_stream_stop(rt);
+ return ret;
+ }
+ }
+
+ /* wait for first out urb to return (sent in in urb handler) */
+ wait_event_timeout(rt->stream_wait_queue, rt->stream_wait_cond,
+ HZ);
+ if (rt->stream_wait_cond)
+ rt->stream_state = STREAM_RUNNING;
+ else {
+ usb6fire_pcm_stream_stop(rt);
+ return -EIO;
+ }
+ }
+ return 0;
+}
+
+/* call with substream locked */
+static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb)
+{
+ int i;
+ int frame;
+ int frame_count;
+ unsigned int total_length = 0;
+ struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance);
+ struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
+ u32 *src = NULL;
+ u32 *dest = (u32 *) (alsa_rt->dma_area + sub->dma_off
+ * (alsa_rt->frame_bits >> 3));
+ u32 *dest_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size
+ * (alsa_rt->frame_bits >> 3));
+ int bytes_per_frame = alsa_rt->channels << 2;
+
+ for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
+ /* at least 4 header bytes for valid packet.
+ * after that: 32 bits per sample for analog channels */
+ if (urb->packets[i].actual_length > 4)
+ frame_count = (urb->packets[i].actual_length - 4)
+ / (rt->in_n_analog << 2);
+ else
+ frame_count = 0;
+
+ if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE)
+ src = (u32 *) (urb->buffer + total_length);
+ else if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE)
+ src = (u32 *) (urb->buffer - 1 + total_length);
+ else
+ return;
+ src++; /* skip leading 4 bytes of every packet */
+ total_length += urb->packets[i].length;
+ for (frame = 0; frame < frame_count; frame++) {
+ memcpy(dest, src, bytes_per_frame);
+ dest += alsa_rt->channels;
+ src += rt->in_n_analog;
+ sub->dma_off++;
+ sub->period_off++;
+ if (dest == dest_end) {
+ sub->dma_off = 0;
+ dest = (u32 *) alsa_rt->dma_area;
+ }
+ }
+ }
+}
+
+/* call with substream locked */
+static void usb6fire_pcm_playback(struct pcm_substream *sub,
+ struct pcm_urb *urb)
+{
+ int i;
+ int frame;
+ int frame_count;
+ struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance);
+ struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
+ u32 *src = (u32 *) (alsa_rt->dma_area + sub->dma_off
+ * (alsa_rt->frame_bits >> 3));
+ u32 *src_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size
+ * (alsa_rt->frame_bits >> 3));
+ u32 *dest;
+ int bytes_per_frame = alsa_rt->channels << 2;
+
+ if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE)
+ dest = (u32 *) (urb->buffer - 1);
+ else if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE)
+ dest = (u32 *) (urb->buffer);
+ else {
+ dev_err(&rt->chip->dev->dev, "Unknown sample format.");
+ return;
+ }
+
+ for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
+ /* at least 4 header bytes for valid packet.
+ * after that: 32 bits per sample for analog channels */
+ if (urb->packets[i].length > 4)
+ frame_count = (urb->packets[i].length - 4)
+ / (rt->out_n_analog << 2);
+ else
+ frame_count = 0;
+ dest++; /* skip leading 4 bytes of every frame */
+ for (frame = 0; frame < frame_count; frame++) {
+ memcpy(dest, src, bytes_per_frame);
+ src += alsa_rt->channels;
+ dest += rt->out_n_analog;
+ sub->dma_off++;
+ sub->period_off++;
+ if (src == src_end) {
+ src = (u32 *) alsa_rt->dma_area;
+ sub->dma_off = 0;
+ }
+ }
+ }
+}
+
+static void usb6fire_pcm_in_urb_handler(struct urb *usb_urb)
+{
+ struct pcm_urb *in_urb = usb_urb->context;
+ struct pcm_urb *out_urb = in_urb->peer;
+ struct pcm_runtime *rt = in_urb->chip->pcm;
+ struct pcm_substream *sub;
+ unsigned long flags;
+ int total_length = 0;
+ int frame_count;
+ int frame;
+ int channel;
+ int i;
+ u8 *dest;
+
+ if (usb_urb->status || rt->panic || rt->stream_state == STREAM_STOPPING)
+ return;
+ for (i = 0; i < PCM_N_PACKETS_PER_URB; i++)
+ if (in_urb->packets[i].status) {
+ rt->panic = true;
+ return;
+ }
+
+ if (rt->stream_state == STREAM_DISABLED) {
+ dev_err(&rt->chip->dev->dev,
+ "internal error: stream disabled in in-urb handler.\n");
+ return;
+ }
+
+ /* receive our capture data */
+ sub = &rt->capture;
+ spin_lock_irqsave(&sub->lock, flags);
+ if (sub->active) {
+ usb6fire_pcm_capture(sub, in_urb);
+ if (sub->period_off >= sub->instance->runtime->period_size) {
+ sub->period_off %= sub->instance->runtime->period_size;
+ spin_unlock_irqrestore(&sub->lock, flags);
+ snd_pcm_period_elapsed(sub->instance);
+ } else
+ spin_unlock_irqrestore(&sub->lock, flags);
+ } else
+ spin_unlock_irqrestore(&sub->lock, flags);
+
+ /* setup out urb structure */
+ for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
+ out_urb->packets[i].offset = total_length;
+ out_urb->packets[i].length = (in_urb->packets[i].actual_length
+ - 4) / (rt->in_n_analog << 2)
+ * (rt->out_n_analog << 2) + 4;
+ out_urb->packets[i].status = 0;
+ total_length += out_urb->packets[i].length;
+ }
+ memset(out_urb->buffer, 0, total_length);
+
+ /* now send our playback data (if a free out urb was found) */
+ sub = &rt->playback;
+ spin_lock_irqsave(&sub->lock, flags);
+ if (sub->active) {
+ usb6fire_pcm_playback(sub, out_urb);
+ if (sub->period_off >= sub->instance->runtime->period_size) {
+ sub->period_off %= sub->instance->runtime->period_size;
+ spin_unlock_irqrestore(&sub->lock, flags);
+ snd_pcm_period_elapsed(sub->instance);
+ } else
+ spin_unlock_irqrestore(&sub->lock, flags);
+ } else
+ spin_unlock_irqrestore(&sub->lock, flags);
+
+ /* setup the 4th byte of each sample (0x40 for analog channels) */
+ dest = out_urb->buffer;
+ for (i = 0; i < PCM_N_PACKETS_PER_URB; i++)
+ if (out_urb->packets[i].length >= 4) {
+ frame_count = (out_urb->packets[i].length - 4)
+ / (rt->out_n_analog << 2);
+ *(dest++) = 0xaa;
+ *(dest++) = 0xaa;
+ *(dest++) = frame_count;
+ *(dest++) = 0x00;
+ for (frame = 0; frame < frame_count; frame++)
+ for (channel = 0;
+ channel < rt->out_n_analog;
+ channel++) {
+ dest += 3; /* skip sample data */
+ *(dest++) = 0x40;
+ }
+ }
+ usb_submit_urb(&out_urb->instance, GFP_ATOMIC);
+ usb_submit_urb(&in_urb->instance, GFP_ATOMIC);
+}
+
+static void usb6fire_pcm_out_urb_handler(struct urb *usb_urb)
+{
+ struct pcm_urb *urb = usb_urb->context;
+ struct pcm_runtime *rt = urb->chip->pcm;
+
+ if (rt->stream_state == STREAM_STARTING) {
+ rt->stream_wait_cond = true;
+ wake_up(&rt->stream_wait_queue);
+ }
+}
+
+static int usb6fire_pcm_open(struct snd_pcm_substream *alsa_sub)
+{
+ struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
+ struct pcm_substream *sub = NULL;
+ struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
+
+ if (rt->panic)
+ return -EPIPE;
+
+ mutex_lock(&rt->stream_mutex);
+ alsa_rt->hw = pcm_hw;
+
+ if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (rt->rate < ARRAY_SIZE(rates))
+ alsa_rt->hw.rates = rates_alsaid[rt->rate];
+ alsa_rt->hw.channels_max = OUT_N_CHANNELS;
+ sub = &rt->playback;
+ } else if (alsa_sub->stream == SNDRV_PCM_STREAM_CAPTURE) {
+ if (rt->rate < ARRAY_SIZE(rates))
+ alsa_rt->hw.rates = rates_alsaid[rt->rate];
+ alsa_rt->hw.channels_max = IN_N_CHANNELS;
+ sub = &rt->capture;
+ }
+
+ if (!sub) {
+ mutex_unlock(&rt->stream_mutex);
+ dev_err(&rt->chip->dev->dev, "invalid stream type.\n");
+ return -EINVAL;
+ }
+
+ sub->instance = alsa_sub;
+ sub->active = false;
+ mutex_unlock(&rt->stream_mutex);
+ return 0;
+}
+
+static int usb6fire_pcm_close(struct snd_pcm_substream *alsa_sub)
+{
+ struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
+ struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
+ unsigned long flags;
+
+ if (rt->panic)
+ return 0;
+
+ mutex_lock(&rt->stream_mutex);
+ if (sub) {
+ /* deactivate substream */
+ spin_lock_irqsave(&sub->lock, flags);
+ sub->instance = NULL;
+ sub->active = false;
+ spin_unlock_irqrestore(&sub->lock, flags);
+
+ /* all substreams closed? if so, stop streaming */
+ if (!rt->playback.instance && !rt->capture.instance) {
+ usb6fire_pcm_stream_stop(rt);
+ rt->rate = ARRAY_SIZE(rates);
+ }
+ }
+ mutex_unlock(&rt->stream_mutex);
+ return 0;
+}
+
+static int usb6fire_pcm_hw_params(struct snd_pcm_substream *alsa_sub,
+ struct snd_pcm_hw_params *hw_params)
+{
+ return snd_pcm_lib_alloc_vmalloc_buffer(alsa_sub,
+ params_buffer_bytes(hw_params));
+}
+
+static int usb6fire_pcm_hw_free(struct snd_pcm_substream *alsa_sub)
+{
+ return snd_pcm_lib_free_vmalloc_buffer(alsa_sub);
+}
+
+static int usb6fire_pcm_prepare(struct snd_pcm_substream *alsa_sub)
+{
+ struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
+ struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
+ struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
+ int ret;
+
+ if (rt->panic)
+ return -EPIPE;
+ if (!sub)
+ return -ENODEV;
+
+ mutex_lock(&rt->stream_mutex);
+ sub->dma_off = 0;
+ sub->period_off = 0;
+
+ if (rt->stream_state == STREAM_DISABLED) {
+ for (rt->rate = 0; rt->rate < ARRAY_SIZE(rates); rt->rate++)
+ if (alsa_rt->rate == rates[rt->rate])
+ break;
+ if (rt->rate == ARRAY_SIZE(rates)) {
+ mutex_unlock(&rt->stream_mutex);
+ dev_err(&rt->chip->dev->dev,
+ "invalid rate %d in prepare.\n",
+ alsa_rt->rate);
+ return -EINVAL;
+ }
+
+ ret = usb6fire_pcm_set_rate(rt);
+ if (ret) {
+ mutex_unlock(&rt->stream_mutex);
+ return ret;
+ }
+ ret = usb6fire_pcm_stream_start(rt);
+ if (ret) {
+ mutex_unlock(&rt->stream_mutex);
+ dev_err(&rt->chip->dev->dev,
+ "could not start pcm stream.\n");
+ return ret;
+ }
+ }
+ mutex_unlock(&rt->stream_mutex);
+ return 0;
+}
+
+static int usb6fire_pcm_trigger(struct snd_pcm_substream *alsa_sub, int cmd)
+{
+ struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
+ struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
+ unsigned long flags;
+
+ if (rt->panic)
+ return -EPIPE;
+ if (!sub)
+ return -ENODEV;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ spin_lock_irqsave(&sub->lock, flags);
+ sub->active = true;
+ spin_unlock_irqrestore(&sub->lock, flags);
+ return 0;
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ spin_lock_irqsave(&sub->lock, flags);
+ sub->active = false;
+ spin_unlock_irqrestore(&sub->lock, flags);
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static snd_pcm_uframes_t usb6fire_pcm_pointer(
+ struct snd_pcm_substream *alsa_sub)
+{
+ struct pcm_substream *sub = usb6fire_pcm_get_substream(alsa_sub);
+ struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
+ unsigned long flags;
+ snd_pcm_uframes_t ret;
+
+ if (rt->panic || !sub)
+ return SNDRV_PCM_POS_XRUN;
+
+ spin_lock_irqsave(&sub->lock, flags);
+ ret = sub->dma_off;
+ spin_unlock_irqrestore(&sub->lock, flags);
+ return ret;
+}
+
+static struct snd_pcm_ops pcm_ops = {
+ .open = usb6fire_pcm_open,
+ .close = usb6fire_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = usb6fire_pcm_hw_params,
+ .hw_free = usb6fire_pcm_hw_free,
+ .prepare = usb6fire_pcm_prepare,
+ .trigger = usb6fire_pcm_trigger,
+ .pointer = usb6fire_pcm_pointer,
+ .page = snd_pcm_lib_get_vmalloc_page,
+ .mmap = snd_pcm_lib_mmap_vmalloc,
+};
+
+static void usb6fire_pcm_init_urb(struct pcm_urb *urb,
+ struct sfire_chip *chip, bool in, int ep,
+ void (*handler)(struct urb *))
+{
+ urb->chip = chip;
+ usb_init_urb(&urb->instance);
+ urb->instance.transfer_buffer = urb->buffer;
+ urb->instance.transfer_buffer_length =
+ PCM_N_PACKETS_PER_URB * PCM_MAX_PACKET_SIZE;
+ urb->instance.dev = chip->dev;
+ urb->instance.pipe = in ? usb_rcvisocpipe(chip->dev, ep)
+ : usb_sndisocpipe(chip->dev, ep);
+ urb->instance.interval = 1;
+ urb->instance.complete = handler;
+ urb->instance.context = urb;
+ urb->instance.number_of_packets = PCM_N_PACKETS_PER_URB;
+}
+
+static int usb6fire_pcm_buffers_init(struct pcm_runtime *rt)
+{
+ int i;
+
+ for (i = 0; i < PCM_N_URBS; i++) {
+ rt->out_urbs[i].buffer = kzalloc(PCM_N_PACKETS_PER_URB
+ * PCM_MAX_PACKET_SIZE, GFP_KERNEL);
+ if (!rt->out_urbs[i].buffer)
+ return -ENOMEM;
+ rt->in_urbs[i].buffer = kzalloc(PCM_N_PACKETS_PER_URB
+ * PCM_MAX_PACKET_SIZE, GFP_KERNEL);
+ if (!rt->in_urbs[i].buffer)
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static void usb6fire_pcm_buffers_destroy(struct pcm_runtime *rt)
+{
+ int i;
+
+ for (i = 0; i < PCM_N_URBS; i++) {
+ kfree(rt->out_urbs[i].buffer);
+ kfree(rt->in_urbs[i].buffer);
+ }
+}
+
+int usb6fire_pcm_init(struct sfire_chip *chip)
+{
+ int i;
+ int ret;
+ struct snd_pcm *pcm;
+ struct pcm_runtime *rt =
+ kzalloc(sizeof(struct pcm_runtime), GFP_KERNEL);
+
+ if (!rt)
+ return -ENOMEM;
+
+ ret = usb6fire_pcm_buffers_init(rt);
+ if (ret) {
+ usb6fire_pcm_buffers_destroy(rt);
+ kfree(rt);
+ return ret;
+ }
+
+ rt->chip = chip;
+ rt->stream_state = STREAM_DISABLED;
+ rt->rate = ARRAY_SIZE(rates);
+ init_waitqueue_head(&rt->stream_wait_queue);
+ mutex_init(&rt->stream_mutex);
+
+ spin_lock_init(&rt->playback.lock);
+ spin_lock_init(&rt->capture.lock);
+
+ for (i = 0; i < PCM_N_URBS; i++) {
+ usb6fire_pcm_init_urb(&rt->in_urbs[i], chip, true, IN_EP,
+ usb6fire_pcm_in_urb_handler);
+ usb6fire_pcm_init_urb(&rt->out_urbs[i], chip, false, OUT_EP,
+ usb6fire_pcm_out_urb_handler);
+
+ rt->in_urbs[i].peer = &rt->out_urbs[i];
+ rt->out_urbs[i].peer = &rt->in_urbs[i];
+ }
+
+ ret = snd_pcm_new(chip->card, "DMX6FireUSB", 0, 1, 1, &pcm);
+ if (ret < 0) {
+ usb6fire_pcm_buffers_destroy(rt);
+ kfree(rt);
+ dev_err(&chip->dev->dev, "cannot create pcm instance.\n");
+ return ret;
+ }
+
+ pcm->private_data = rt;
+ strcpy(pcm->name, "DMX 6Fire USB");
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_ops);
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_ops);
+
+ if (ret) {
+ usb6fire_pcm_buffers_destroy(rt);
+ kfree(rt);
+ dev_err(&chip->dev->dev,
+ "error preallocating pcm buffers.\n");
+ return ret;
+ }
+ rt->instance = pcm;
+
+ chip->pcm = rt;
+ return 0;
+}
+
+void usb6fire_pcm_abort(struct sfire_chip *chip)
+{
+ struct pcm_runtime *rt = chip->pcm;
+ int i;
+
+ if (rt) {
+ rt->panic = true;
+
+ if (rt->playback.instance)
+ snd_pcm_stop_xrun(rt->playback.instance);
+
+ if (rt->capture.instance)
+ snd_pcm_stop_xrun(rt->capture.instance);
+
+ for (i = 0; i < PCM_N_URBS; i++) {
+ usb_poison_urb(&rt->in_urbs[i].instance);
+ usb_poison_urb(&rt->out_urbs[i].instance);
+ }
+
+ }
+}
+
+void usb6fire_pcm_destroy(struct sfire_chip *chip)
+{
+ struct pcm_runtime *rt = chip->pcm;
+
+ usb6fire_pcm_buffers_destroy(rt);
+ kfree(rt);
+ chip->pcm = NULL;
+}