Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
new file mode 100644
index 0000000..84b0bbd
--- /dev/null
+++ b/sound/usb/usbaudio.c
@@ -0,0 +1,3337 @@
+/*
+ * (Tentative) USB Audio Driver for ALSA
+ *
+ * Main and PCM part
+ *
+ * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
+ *
+ * Many codes borrowed from audio.c by
+ * Alan Cox (alan@lxorguk.ukuu.org.uk)
+ * Thomas Sailer (sailer@ife.ee.ethz.ch)
+ *
+ *
+ * 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
+ *
+ *
+ * NOTES:
+ *
+ * - async unlink should be used for avoiding the sleep inside lock.
+ * 2.4.22 usb-uhci seems buggy for async unlinking and results in
+ * oops. in such a cse, pass async_unlink=0 option.
+ * - the linked URBs would be preferred but not used so far because of
+ * the instability of unlinking.
+ * - type II is not supported properly. there is no device which supports
+ * this type *correctly*. SB extigy looks as if it supports, but it's
+ * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream).
+ */
+
+
+#include <sound/driver.h>
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/usb.h>
+#include <linux/moduleparam.h>
+#include <sound/core.h>
+#include <sound/info.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+
+#include "usbaudio.h"
+
+
+MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
+MODULE_DESCRIPTION("USB Audio");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
+
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
+static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
+static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
+static int nrpacks = 4; /* max. number of packets per urb */
+static int async_unlink = 1;
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for the USB audio adapter.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable USB audio adapter.");
+module_param_array(vid, int, NULL, 0444);
+MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
+module_param_array(pid, int, NULL, 0444);
+MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
+module_param(nrpacks, int, 0444);
+MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
+module_param(async_unlink, bool, 0444);
+MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
+
+
+/*
+ * debug the h/w constraints
+ */
+/* #define HW_CONST_DEBUG */
+
+
+/*
+ *
+ */
+
+#define MAX_PACKS 10
+#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
+#define MAX_URBS 5 /* max. 20ms long packets */
+#define SYNC_URBS 2 /* always two urbs for sync */
+#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
+
+typedef struct snd_usb_substream snd_usb_substream_t;
+typedef struct snd_usb_stream snd_usb_stream_t;
+typedef struct snd_urb_ctx snd_urb_ctx_t;
+
+struct audioformat {
+ struct list_head list;
+ snd_pcm_format_t format; /* format type */
+ unsigned int channels; /* # channels */
+ unsigned int fmt_type; /* USB audio format type (1-3) */
+ unsigned int frame_size; /* samples per frame for non-audio */
+ int iface; /* interface number */
+ unsigned char altsetting; /* corresponding alternate setting */
+ unsigned char altset_idx; /* array index of altenate setting */
+ unsigned char attributes; /* corresponding attributes of cs endpoint */
+ unsigned char endpoint; /* endpoint */
+ unsigned char ep_attr; /* endpoint attributes */
+ unsigned int maxpacksize; /* max. packet size */
+ unsigned int rates; /* rate bitmasks */
+ unsigned int rate_min, rate_max; /* min/max rates */
+ unsigned int nr_rates; /* number of rate table entries */
+ unsigned int *rate_table; /* rate table */
+};
+
+struct snd_urb_ctx {
+ struct urb *urb;
+ snd_usb_substream_t *subs;
+ int index; /* index for urb array */
+ int packets; /* number of packets per urb */
+ int transfer; /* transferred size */
+ char *buf; /* buffer for capture */
+};
+
+struct snd_urb_ops {
+ int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
+ int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
+ int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
+ int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
+};
+
+struct snd_usb_substream {
+ snd_usb_stream_t *stream;
+ struct usb_device *dev;
+ snd_pcm_substream_t *pcm_substream;
+ int direction; /* playback or capture */
+ int interface; /* current interface */
+ int endpoint; /* assigned endpoint */
+ struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */
+ unsigned int cur_rate; /* current rate (for hw_params callback) */
+ unsigned int period_bytes; /* current period bytes (for hw_params callback) */
+ unsigned int format; /* USB data format */
+ unsigned int datapipe; /* the data i/o pipe */
+ unsigned int syncpipe; /* 1 - async out or adaptive in */
+ unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
+ unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
+ unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
+ unsigned int freqmax; /* maximum sampling rate, used for buffer management */
+ unsigned int phase; /* phase accumulator */
+ unsigned int maxpacksize; /* max packet size in bytes */
+ unsigned int maxframesize; /* max packet size in frames */
+ unsigned int curpacksize; /* current packet size in bytes (for capture) */
+ unsigned int curframesize; /* current packet size in frames (for capture) */
+ unsigned int fill_max: 1; /* fill max packet size always */
+ unsigned int fmt_type; /* USB audio format type (1-3) */
+
+ unsigned int running: 1; /* running status */
+
+ unsigned int hwptr; /* free frame position in the buffer (only for playback) */
+ unsigned int hwptr_done; /* processed frame position in the buffer */
+ unsigned int transfer_sched; /* scheduled frames since last period (for playback) */
+ unsigned int transfer_done; /* processed frames since last period update */
+ unsigned long active_mask; /* bitmask of active urbs */
+ unsigned long unlink_mask; /* bitmask of unlinked urbs */
+
+ unsigned int nurbs; /* # urbs */
+ snd_urb_ctx_t dataurb[MAX_URBS]; /* data urb table */
+ snd_urb_ctx_t syncurb[SYNC_URBS]; /* sync urb table */
+ char syncbuf[SYNC_URBS * MAX_PACKS * 4]; /* sync buffer; it's so small - let's get static */
+ char *tmpbuf; /* temporary buffer for playback */
+
+ u64 formats; /* format bitmasks (all or'ed) */
+ unsigned int num_formats; /* number of supported audio formats (list) */
+ struct list_head fmt_list; /* format list */
+ spinlock_t lock;
+
+ struct snd_urb_ops ops; /* callbacks (must be filled at init) */
+};
+
+
+struct snd_usb_stream {
+ snd_usb_audio_t *chip;
+ snd_pcm_t *pcm;
+ int pcm_index;
+ unsigned int fmt_type; /* USB audio format type (1-3) */
+ snd_usb_substream_t substream[2];
+ struct list_head list;
+};
+
+
+/*
+ * we keep the snd_usb_audio_t instances by ourselves for merging
+ * the all interfaces on the same card as one sound device.
+ */
+
+static DECLARE_MUTEX(register_mutex);
+static snd_usb_audio_t *usb_chip[SNDRV_CARDS];
+
+
+/*
+ * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
+ * this will overflow at approx 524 kHz
+ */
+inline static unsigned get_usb_full_speed_rate(unsigned int rate)
+{
+ return ((rate << 13) + 62) / 125;
+}
+
+/*
+ * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
+ * this will overflow at approx 4 MHz
+ */
+inline static unsigned get_usb_high_speed_rate(unsigned int rate)
+{
+ return ((rate << 10) + 62) / 125;
+}
+
+/* convert our full speed USB rate into sampling rate in Hz */
+inline static unsigned get_full_speed_hz(unsigned int usb_rate)
+{
+ return (usb_rate * 125 + (1 << 12)) >> 13;
+}
+
+/* convert our high speed USB rate into sampling rate in Hz */
+inline static unsigned get_high_speed_hz(unsigned int usb_rate)
+{
+ return (usb_rate * 125 + (1 << 9)) >> 10;
+}
+
+
+/*
+ * prepare urb for full speed capture sync pipe
+ *
+ * fill the length and offset of each urb descriptor.
+ * the fixed 10.14 frequency is passed through the pipe.
+ */
+static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ unsigned char *cp = urb->transfer_buffer;
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+ int i, offs;
+
+ urb->number_of_packets = ctx->packets;
+ urb->dev = ctx->subs->dev; /* we need to set this at each time */
+ for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4, cp += 4) {
+ urb->iso_frame_desc[i].length = 3;
+ urb->iso_frame_desc[i].offset = offs;
+ cp[0] = subs->freqn >> 2;
+ cp[1] = subs->freqn >> 10;
+ cp[2] = subs->freqn >> 18;
+ }
+ return 0;
+}
+
+/*
+ * prepare urb for high speed capture sync pipe
+ *
+ * fill the length and offset of each urb descriptor.
+ * the fixed 12.13 frequency is passed as 16.16 through the pipe.
+ */
+static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ unsigned char *cp = urb->transfer_buffer;
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+ int i, offs;
+
+ urb->number_of_packets = ctx->packets;
+ urb->dev = ctx->subs->dev; /* we need to set this at each time */
+ for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4, cp += 4) {
+ urb->iso_frame_desc[i].length = 4;
+ urb->iso_frame_desc[i].offset = offs;
+ cp[0] = subs->freqn;
+ cp[1] = subs->freqn >> 8;
+ cp[2] = subs->freqn >> 16;
+ cp[3] = subs->freqn >> 24;
+ }
+ return 0;
+}
+
+/*
+ * process after capture sync complete
+ * - nothing to do
+ */
+static int retire_capture_sync_urb(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ return 0;
+}
+
+/*
+ * prepare urb for capture data pipe
+ *
+ * fill the offset and length of each descriptor.
+ *
+ * we use a temporary buffer to write the captured data.
+ * since the length of written data is determined by host, we cannot
+ * write onto the pcm buffer directly... the data is thus copied
+ * later at complete callback to the global buffer.
+ */
+static int prepare_capture_urb(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ int i, offs;
+ unsigned long flags;
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+
+ offs = 0;
+ urb->dev = ctx->subs->dev; /* we need to set this at each time */
+ urb->number_of_packets = 0;
+ spin_lock_irqsave(&subs->lock, flags);
+ for (i = 0; i < ctx->packets; i++) {
+ urb->iso_frame_desc[i].offset = offs;
+ urb->iso_frame_desc[i].length = subs->curpacksize;
+ offs += subs->curpacksize;
+ urb->number_of_packets++;
+ subs->transfer_sched += subs->curframesize;
+ if (subs->transfer_sched >= runtime->period_size) {
+ subs->transfer_sched -= runtime->period_size;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&subs->lock, flags);
+ urb->transfer_buffer = ctx->buf;
+ urb->transfer_buffer_length = offs;
+#if 0 // for check
+ if (! urb->bandwidth) {
+ int bustime;
+ bustime = usb_check_bandwidth(urb->dev, urb);
+ if (bustime < 0)
+ return bustime;
+ printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
+ usb_claim_bandwidth(urb->dev, urb, bustime, 1);
+ }
+#endif // for check
+ return 0;
+}
+
+/*
+ * process after capture complete
+ *
+ * copy the data from each desctiptor to the pcm buffer, and
+ * update the current position.
+ */
+static int retire_capture_urb(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ unsigned long flags;
+ unsigned char *cp;
+ int i;
+ unsigned int stride, len, oldptr;
+
+ stride = runtime->frame_bits >> 3;
+
+ for (i = 0; i < urb->number_of_packets; i++) {
+ cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+ if (urb->iso_frame_desc[i].status) {
+ snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
+ // continue;
+ }
+ len = urb->iso_frame_desc[i].actual_length / stride;
+ if (! len)
+ continue;
+ /* update the current pointer */
+ spin_lock_irqsave(&subs->lock, flags);
+ oldptr = subs->hwptr_done;
+ subs->hwptr_done += len;
+ if (subs->hwptr_done >= runtime->buffer_size)
+ subs->hwptr_done -= runtime->buffer_size;
+ subs->transfer_done += len;
+ spin_unlock_irqrestore(&subs->lock, flags);
+ /* copy a data chunk */
+ if (oldptr + len > runtime->buffer_size) {
+ unsigned int cnt = runtime->buffer_size - oldptr;
+ unsigned int blen = cnt * stride;
+ memcpy(runtime->dma_area + oldptr * stride, cp, blen);
+ memcpy(runtime->dma_area, cp + blen, len * stride - blen);
+ } else {
+ memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
+ }
+ /* update the pointer, call callback if necessary */
+ spin_lock_irqsave(&subs->lock, flags);
+ if (subs->transfer_done >= runtime->period_size) {
+ subs->transfer_done -= runtime->period_size;
+ spin_unlock_irqrestore(&subs->lock, flags);
+ snd_pcm_period_elapsed(subs->pcm_substream);
+ } else
+ spin_unlock_irqrestore(&subs->lock, flags);
+ }
+ return 0;
+}
+
+
+/*
+ * prepare urb for full speed playback sync pipe
+ *
+ * set up the offset and length to receive the current frequency.
+ */
+
+static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ int i, offs;
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+
+ urb->number_of_packets = ctx->packets;
+ urb->dev = ctx->subs->dev; /* we need to set this at each time */
+ for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4) {
+ urb->iso_frame_desc[i].length = 3;
+ urb->iso_frame_desc[i].offset = offs;
+ }
+ return 0;
+}
+
+/*
+ * prepare urb for high speed playback sync pipe
+ *
+ * set up the offset and length to receive the current frequency.
+ */
+
+static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ int i, offs;
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+
+ urb->number_of_packets = ctx->packets;
+ urb->dev = ctx->subs->dev; /* we need to set this at each time */
+ for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4) {
+ urb->iso_frame_desc[i].length = 4;
+ urb->iso_frame_desc[i].offset = offs;
+ }
+ return 0;
+}
+
+/*
+ * process after full speed playback sync complete
+ *
+ * retrieve the current 10.14 frequency from pipe, and set it.
+ * the value is referred in prepare_playback_urb().
+ */
+static int retire_playback_sync_urb(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ int i;
+ unsigned int f, found;
+ unsigned char *cp = urb->transfer_buffer;
+ unsigned long flags;
+
+ found = 0;
+ for (i = 0; i < urb->number_of_packets; i++, cp += 4) {
+ if (urb->iso_frame_desc[i].status ||
+ urb->iso_frame_desc[i].actual_length < 3)
+ continue;
+ f = combine_triple(cp) << 2;
+#if 0
+ if (f < subs->freqn - (subs->freqn>>3) || f > subs->freqmax) {
+ snd_printd(KERN_WARNING "requested frequency %d (%u,%03uHz) out of range (current nominal %d (%u,%03uHz))\n",
+ f, f >> 14, (f & ((1 << 14) - 1) * 1000) / ((1 << 14) - 1),
+ subs->freqn, subs->freqn >> 14, (subs->freqn & ((1 << 14) - 1) * 1000) / ((1 << 14) - 1));
+ continue;
+ }
+#endif
+ found = f;
+ }
+ if (found) {
+ spin_lock_irqsave(&subs->lock, flags);
+ subs->freqm = found;
+ spin_unlock_irqrestore(&subs->lock, flags);
+ }
+
+ return 0;
+}
+
+/*
+ * process after high speed playback sync complete
+ *
+ * retrieve the current 12.13 frequency from pipe, and set it.
+ * the value is referred in prepare_playback_urb().
+ */
+static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ int i;
+ unsigned int found;
+ unsigned char *cp = urb->transfer_buffer;
+ unsigned long flags;
+
+ found = 0;
+ for (i = 0; i < urb->number_of_packets; i++, cp += 4) {
+ if (urb->iso_frame_desc[i].status ||
+ urb->iso_frame_desc[i].actual_length < 4)
+ continue;
+ found = combine_quad(cp) & 0x0fffffff;
+ }
+ if (found) {
+ spin_lock_irqsave(&subs->lock, flags);
+ subs->freqm = found;
+ spin_unlock_irqrestore(&subs->lock, flags);
+ }
+
+ return 0;
+}
+
+/*
+ * prepare urb for playback data pipe
+ *
+ * we copy the data directly from the pcm buffer.
+ * the current position to be copied is held in hwptr field.
+ * since a urb can handle only a single linear buffer, if the total
+ * transferred area overflows the buffer boundary, we cannot send
+ * it directly from the buffer. thus the data is once copied to
+ * a temporary buffer and urb points to that.
+ */
+static int prepare_playback_urb(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ int i, stride, offs;
+ unsigned int counts;
+ unsigned long flags;
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+
+ stride = runtime->frame_bits >> 3;
+
+ offs = 0;
+ urb->dev = ctx->subs->dev; /* we need to set this at each time */
+ urb->number_of_packets = 0;
+ spin_lock_irqsave(&subs->lock, flags);
+ for (i = 0; i < ctx->packets; i++) {
+ /* calculate the size of a packet */
+ if (subs->fill_max)
+ counts = subs->maxframesize; /* fixed */
+ else {
+ subs->phase = (subs->phase & 0xffff) + subs->freqm;
+ counts = subs->phase >> 16;
+ if (counts > subs->maxframesize)
+ counts = subs->maxframesize;
+ }
+ /* set up descriptor */
+ urb->iso_frame_desc[i].offset = offs * stride;
+ urb->iso_frame_desc[i].length = counts * stride;
+ offs += counts;
+ urb->number_of_packets++;
+ subs->transfer_sched += counts;
+ if (subs->transfer_sched >= runtime->period_size) {
+ subs->transfer_sched -= runtime->period_size;
+ if (subs->fmt_type == USB_FORMAT_TYPE_II) {
+ if (subs->transfer_sched > 0) {
+ /* FIXME: fill-max mode is not supported yet */
+ offs -= subs->transfer_sched;
+ counts -= subs->transfer_sched;
+ urb->iso_frame_desc[i].length = counts * stride;
+ subs->transfer_sched = 0;
+ }
+ i++;
+ if (i < ctx->packets) {
+ /* add a transfer delimiter */
+ urb->iso_frame_desc[i].offset = offs * stride;
+ urb->iso_frame_desc[i].length = 0;
+ urb->number_of_packets++;
+ }
+ }
+ break;
+ }
+ }
+ if (subs->hwptr + offs > runtime->buffer_size) {
+ /* err, the transferred area goes over buffer boundary.
+ * copy the data to the temp buffer.
+ */
+ int len;
+ len = runtime->buffer_size - subs->hwptr;
+ urb->transfer_buffer = subs->tmpbuf;
+ memcpy(subs->tmpbuf, runtime->dma_area + subs->hwptr * stride, len * stride);
+ memcpy(subs->tmpbuf + len * stride, runtime->dma_area, (offs - len) * stride);
+ subs->hwptr += offs;
+ subs->hwptr -= runtime->buffer_size;
+ } else {
+ /* set the buffer pointer */
+ urb->transfer_buffer = runtime->dma_area + subs->hwptr * stride;
+ subs->hwptr += offs;
+ }
+ spin_unlock_irqrestore(&subs->lock, flags);
+ urb->transfer_buffer_length = offs * stride;
+ ctx->transfer = offs;
+
+ return 0;
+}
+
+/*
+ * process after playback data complete
+ *
+ * update the current position and call callback if a period is processed.
+ */
+static int retire_playback_urb(snd_usb_substream_t *subs,
+ snd_pcm_runtime_t *runtime,
+ struct urb *urb)
+{
+ unsigned long flags;
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+
+ spin_lock_irqsave(&subs->lock, flags);
+ subs->transfer_done += ctx->transfer;
+ subs->hwptr_done += ctx->transfer;
+ ctx->transfer = 0;
+ if (subs->hwptr_done >= runtime->buffer_size)
+ subs->hwptr_done -= runtime->buffer_size;
+ if (subs->transfer_done >= runtime->period_size) {
+ subs->transfer_done -= runtime->period_size;
+ spin_unlock_irqrestore(&subs->lock, flags);
+ snd_pcm_period_elapsed(subs->pcm_substream);
+ } else
+ spin_unlock_irqrestore(&subs->lock, flags);
+ return 0;
+}
+
+
+/*
+ */
+static struct snd_urb_ops audio_urb_ops[2] = {
+ {
+ .prepare = prepare_playback_urb,
+ .retire = retire_playback_urb,
+ .prepare_sync = prepare_playback_sync_urb,
+ .retire_sync = retire_playback_sync_urb,
+ },
+ {
+ .prepare = prepare_capture_urb,
+ .retire = retire_capture_urb,
+ .prepare_sync = prepare_capture_sync_urb,
+ .retire_sync = retire_capture_sync_urb,
+ },
+};
+
+static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
+ {
+ .prepare = prepare_playback_urb,
+ .retire = retire_playback_urb,
+ .prepare_sync = prepare_playback_sync_urb_hs,
+ .retire_sync = retire_playback_sync_urb_hs,
+ },
+ {
+ .prepare = prepare_capture_urb,
+ .retire = retire_capture_urb,
+ .prepare_sync = prepare_capture_sync_urb_hs,
+ .retire_sync = retire_capture_sync_urb,
+ },
+};
+
+/*
+ * complete callback from data urb
+ */
+static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
+{
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+ snd_usb_substream_t *subs = ctx->subs;
+ snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
+ int err = 0;
+
+ if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
+ ! subs->running || /* can be stopped during retire callback */
+ (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
+ (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
+ clear_bit(ctx->index, &subs->active_mask);
+ if (err < 0) {
+ snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
+ snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
+ }
+ }
+}
+
+
+/*
+ * complete callback from sync urb
+ */
+static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
+{
+ snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+ snd_usb_substream_t *subs = ctx->subs;
+ snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
+ int err = 0;
+
+ if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
+ ! subs->running || /* can be stopped during retire callback */
+ (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
+ (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
+ clear_bit(ctx->index + 16, &subs->active_mask);
+ if (err < 0) {
+ snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
+ snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
+ }
+ }
+}
+
+
+/*
+ * unlink active urbs.
+ */
+static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
+{
+ unsigned int i;
+ int async;
+
+ subs->running = 0;
+
+ if (!force && subs->stream->chip->shutdown) /* to be sure... */
+ return -EBADFD;
+
+ async = !can_sleep && async_unlink;
+
+ if (! async && in_interrupt())
+ return 0;
+
+ for (i = 0; i < subs->nurbs; i++) {
+ if (test_bit(i, &subs->active_mask)) {
+ if (! test_and_set_bit(i, &subs->unlink_mask)) {
+ struct urb *u = subs->dataurb[i].urb;
+ if (async) {
+ u->transfer_flags |= URB_ASYNC_UNLINK;
+ usb_unlink_urb(u);
+ } else
+ usb_kill_urb(u);
+ }
+ }
+ }
+ if (subs->syncpipe) {
+ for (i = 0; i < SYNC_URBS; i++) {
+ if (test_bit(i+16, &subs->active_mask)) {
+ if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
+ struct urb *u = subs->syncurb[i].urb;
+ if (async) {
+ u->transfer_flags |= URB_ASYNC_UNLINK;
+ usb_unlink_urb(u);
+ } else
+ usb_kill_urb(u);
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+
+/*
+ * set up and start data/sync urbs
+ */
+static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
+{
+ unsigned int i;
+ int err;
+
+ if (subs->stream->chip->shutdown)
+ return -EBADFD;
+
+ for (i = 0; i < subs->nurbs; i++) {
+ snd_assert(subs->dataurb[i].urb, return -EINVAL);
+ if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
+ snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
+ goto __error;
+ }
+ }
+ if (subs->syncpipe) {
+ for (i = 0; i < SYNC_URBS; i++) {
+ snd_assert(subs->syncurb[i].urb, return -EINVAL);
+ if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
+ snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
+ goto __error;
+ }
+ }
+ }
+
+ subs->active_mask = 0;
+ subs->unlink_mask = 0;
+ subs->running = 1;
+ for (i = 0; i < subs->nurbs; i++) {
+ if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
+ snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
+ goto __error;
+ }
+ set_bit(i, &subs->active_mask);
+ }
+ if (subs->syncpipe) {
+ for (i = 0; i < SYNC_URBS; i++) {
+ if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
+ snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
+ goto __error;
+ }
+ set_bit(i + 16, &subs->active_mask);
+ }
+ }
+ return 0;
+
+ __error:
+ // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
+ deactivate_urbs(subs, 0, 0);
+ return -EPIPE;
+}
+
+
+/*
+ * wait until all urbs are processed.
+ */
+static int wait_clear_urbs(snd_usb_substream_t *subs)
+{
+ int timeout = HZ;
+ unsigned int i;
+ int alive;
+
+ do {
+ alive = 0;
+ for (i = 0; i < subs->nurbs; i++) {
+ if (test_bit(i, &subs->active_mask))
+ alive++;
+ }
+ if (subs->syncpipe) {
+ for (i = 0; i < SYNC_URBS; i++) {
+ if (test_bit(i + 16, &subs->active_mask))
+ alive++;
+ }
+ }
+ if (! alive)
+ break;
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ } while (--timeout > 0);
+ if (alive)
+ snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
+ return 0;
+}
+
+
+/*
+ * return the current pcm pointer. just return the hwptr_done value.
+ */
+static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
+{
+ snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
+ return subs->hwptr_done;
+}
+
+
+/*
+ * start/stop substream
+ */
+static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
+{
+ snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
+ int err;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ err = start_urbs(subs, substream->runtime);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ err = deactivate_urbs(subs, 0, 0);
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+ return err < 0 ? err : 0;
+}
+
+
+/*
+ * release a urb data
+ */
+static void release_urb_ctx(snd_urb_ctx_t *u)
+{
+ if (u->urb) {
+ usb_free_urb(u->urb);
+ u->urb = NULL;
+ }
+ if (u->buf) {
+ kfree(u->buf);
+ u->buf = NULL;
+ }
+}
+
+/*
+ * release a substream
+ */
+static void release_substream_urbs(snd_usb_substream_t *subs, int force)
+{
+ int i;
+
+ /* stop urbs (to be sure) */
+ deactivate_urbs(subs, force, 1);
+ wait_clear_urbs(subs);
+
+ for (i = 0; i < MAX_URBS; i++)
+ release_urb_ctx(&subs->dataurb[i]);
+ for (i = 0; i < SYNC_URBS; i++)
+ release_urb_ctx(&subs->syncurb[i]);
+ if (subs->tmpbuf) {
+ kfree(subs->tmpbuf);
+ subs->tmpbuf = NULL;
+ }
+ subs->nurbs = 0;
+}
+
+/*
+ * initialize a substream for plaback/capture
+ */
+static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
+ unsigned int rate, unsigned int frame_bits)
+{
+ unsigned int maxsize, n, i;
+ int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
+ unsigned int npacks[MAX_URBS], urb_packs, total_packs;
+
+ /* calculate the frequency in 16.16 format */
+ if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
+ subs->freqn = get_usb_full_speed_rate(rate);
+ else
+ subs->freqn = get_usb_high_speed_rate(rate);
+ subs->freqm = subs->freqn;
+ subs->freqmax = subs->freqn + (subs->freqn >> 2); /* max. allowed frequency */
+ subs->phase = 0;
+
+ /* calculate the max. size of packet */
+ maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3)) >> 16;
+ if (subs->maxpacksize && maxsize > subs->maxpacksize) {
+ //snd_printd(KERN_DEBUG "maxsize %d is greater than defined size %d\n",
+ // maxsize, subs->maxpacksize);
+ maxsize = subs->maxpacksize;
+ }
+
+ if (subs->fill_max)
+ subs->curpacksize = subs->maxpacksize;
+ else
+ subs->curpacksize = maxsize;
+
+ if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
+ urb_packs = nrpacks;
+ else
+ urb_packs = nrpacks * 8;
+
+ /* allocate a temporary buffer for playback */
+ if (is_playback) {
+ subs->tmpbuf = kmalloc(maxsize * urb_packs, GFP_KERNEL);
+ if (! subs->tmpbuf) {
+ snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
+ return -ENOMEM;
+ }
+ }
+
+ /* decide how many packets to be used */
+ total_packs = (period_bytes + maxsize - 1) / maxsize;
+ if (total_packs < 2 * MIN_PACKS_URB)
+ total_packs = 2 * MIN_PACKS_URB;
+ subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
+ if (subs->nurbs > MAX_URBS) {
+ /* too much... */
+ subs->nurbs = MAX_URBS;
+ total_packs = MAX_URBS * urb_packs;
+ }
+ n = total_packs;
+ for (i = 0; i < subs->nurbs; i++) {
+ npacks[i] = n > urb_packs ? urb_packs : n;
+ n -= urb_packs;
+ }
+ if (subs->nurbs <= 1) {
+ /* too little - we need at least two packets
+ * to ensure contiguous playback/capture
+ */
+ subs->nurbs = 2;
+ npacks[0] = (total_packs + 1) / 2;
+ npacks[1] = total_packs - npacks[0];
+ } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB) {
+ /* the last packet is too small.. */
+ if (subs->nurbs > 2) {
+ /* merge to the first one */
+ npacks[0] += npacks[subs->nurbs - 1];
+ subs->nurbs--;
+ } else {
+ /* divide to two */
+ subs->nurbs = 2;
+ npacks[0] = (total_packs + 1) / 2;
+ npacks[1] = total_packs - npacks[0];
+ }
+ }
+
+ /* allocate and initialize data urbs */
+ for (i = 0; i < subs->nurbs; i++) {
+ snd_urb_ctx_t *u = &subs->dataurb[i];
+ u->index = i;
+ u->subs = subs;
+ u->transfer = 0;
+ u->packets = npacks[i];
+ if (subs->fmt_type == USB_FORMAT_TYPE_II)
+ u->packets++; /* for transfer delimiter */
+ if (! is_playback) {
+ /* allocate a capture buffer per urb */
+ u->buf = kmalloc(maxsize * u->packets, GFP_KERNEL);
+ if (! u->buf) {
+ release_substream_urbs(subs, 0);
+ return -ENOMEM;
+ }
+ }
+ u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
+ if (! u->urb) {
+ release_substream_urbs(subs, 0);
+ return -ENOMEM;
+ }
+ u->urb->dev = subs->dev;
+ u->urb->pipe = subs->datapipe;
+ u->urb->transfer_flags = URB_ISO_ASAP;
+ u->urb->number_of_packets = u->packets;
+ u->urb->interval = 1;
+ u->urb->context = u;
+ u->urb->complete = snd_usb_complete_callback(snd_complete_urb);
+ }
+
+ if (subs->syncpipe) {
+ /* allocate and initialize sync urbs */
+ for (i = 0; i < SYNC_URBS; i++) {
+ snd_urb_ctx_t *u = &subs->syncurb[i];
+ u->index = i;
+ u->subs = subs;
+ u->packets = nrpacks;
+ u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
+ if (! u->urb) {
+ release_substream_urbs(subs, 0);
+ return -ENOMEM;
+ }
+ u->urb->transfer_buffer = subs->syncbuf + i * nrpacks * 4;
+ u->urb->transfer_buffer_length = nrpacks * 4;
+ u->urb->dev = subs->dev;
+ u->urb->pipe = subs->syncpipe;
+ u->urb->transfer_flags = URB_ISO_ASAP;
+ u->urb->number_of_packets = u->packets;
+ if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
+ u->urb->interval = 8;
+ else
+ u->urb->interval = 1;
+ u->urb->context = u;
+ u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb);
+ }
+ }
+ return 0;
+}
+
+
+/*
+ * find a matching audio format
+ */
+static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
+ unsigned int rate, unsigned int channels)
+{
+ struct list_head *p;
+ struct audioformat *found = NULL;
+ int cur_attr = 0, attr;
+
+ list_for_each(p, &subs->fmt_list) {
+ struct audioformat *fp;
+ fp = list_entry(p, struct audioformat, list);
+ if (fp->format != format || fp->channels != channels)
+ continue;
+ if (rate < fp->rate_min || rate > fp->rate_max)
+ continue;
+ if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
+ unsigned int i;
+ for (i = 0; i < fp->nr_rates; i++)
+ if (fp->rate_table[i] == rate)
+ break;
+ if (i >= fp->nr_rates)
+ continue;
+ }
+ attr = fp->ep_attr & EP_ATTR_MASK;
+ if (! found) {
+ found = fp;
+ cur_attr = attr;
+ continue;
+ }
+ /* avoid async out and adaptive in if the other method
+ * supports the same format.
+ * this is a workaround for the case like
+ * M-audio audiophile USB.
+ */
+ if (attr != cur_attr) {
+ if ((attr == EP_ATTR_ASYNC &&
+ subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
+ (attr == EP_ATTR_ADAPTIVE &&
+ subs->direction == SNDRV_PCM_STREAM_CAPTURE))
+ continue;
+ if ((cur_attr == EP_ATTR_ASYNC &&
+ subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
+ (cur_attr == EP_ATTR_ADAPTIVE &&
+ subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
+ found = fp;
+ cur_attr = attr;
+ continue;
+ }
+ }
+ /* find the format with the largest max. packet size */
+ if (fp->maxpacksize > found->maxpacksize) {
+ found = fp;
+ cur_attr = attr;
+ }
+ }
+ return found;
+}
+
+
+/*
+ * initialize the picth control and sample rate
+ */
+static int init_usb_pitch(struct usb_device *dev, int iface,
+ struct usb_host_interface *alts,
+ struct audioformat *fmt)
+{
+ unsigned int ep;
+ unsigned char data[1];
+ int err;
+
+ ep = get_endpoint(alts, 0)->bEndpointAddress;
+ /* if endpoint has pitch control, enable it */
+ if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) {
+ data[0] = 1;
+ if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
+ USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
+ PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
+ snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n",
+ dev->devnum, iface, ep);
+ return err;
+ }
+ }
+ return 0;
+}
+
+static int init_usb_sample_rate(struct usb_device *dev, int iface,
+ struct usb_host_interface *alts,
+ struct audioformat *fmt, int rate)
+{
+ unsigned int ep;
+ unsigned char data[3];
+ int err;
+
+ ep = get_endpoint(alts, 0)->bEndpointAddress;
+ /* if endpoint has sampling rate control, set it */
+ if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) {
+ int crate;
+ data[0] = rate;
+ data[1] = rate >> 8;
+ data[2] = rate >> 16;
+ if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
+ USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
+ SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
+ snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
+ dev->devnum, iface, fmt->altsetting, rate, ep);
+ return err;
+ }
+ if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
+ USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
+ SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
+ snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
+ dev->devnum, iface, fmt->altsetting, ep);
+ return 0; /* some devices don't support reading */
+ }
+ crate = data[0] | (data[1] << 8) | (data[2] << 16);
+ if (crate != rate) {
+ snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate);
+ // runtime->rate = crate;
+ }
+ }
+ return 0;
+}
+
+/*
+ * find a matching format and set up the interface
+ */
+static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
+{
+ struct usb_device *dev = subs->dev;
+ struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
+ struct usb_interface *iface;
+ unsigned int ep, attr;
+ int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
+ int err;
+
+ iface = usb_ifnum_to_if(dev, fmt->iface);
+ snd_assert(iface, return -EINVAL);
+ alts = &iface->altsetting[fmt->altset_idx];
+ altsd = get_iface_desc(alts);
+ snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
+
+ if (fmt == subs->cur_audiofmt)
+ return 0;
+
+ /* close the old interface */
+ if (subs->interface >= 0 && subs->interface != fmt->iface) {
+ usb_set_interface(subs->dev, subs->interface, 0);
+ subs->interface = -1;
+ subs->format = 0;
+ }
+
+ /* set interface */
+ if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) {
+ if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
+ snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
+ dev->devnum, fmt->iface, fmt->altsetting);
+ return -EIO;
+ }
+ snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
+ subs->interface = fmt->iface;
+ subs->format = fmt->altset_idx;
+ }
+
+ /* create a data pipe */
+ ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
+ if (is_playback)
+ subs->datapipe = usb_sndisocpipe(dev, ep);
+ else
+ subs->datapipe = usb_rcvisocpipe(dev, ep);
+ subs->syncpipe = subs->syncinterval = 0;
+ subs->maxpacksize = fmt->maxpacksize;
+ subs->fill_max = 0;
+
+ /* we need a sync pipe in async OUT or adaptive IN mode */
+ /* check the number of EP, since some devices have broken
+ * descriptors which fool us. if it has only one EP,
+ * assume it as adaptive-out or sync-in.
+ */
+ attr = fmt->ep_attr & EP_ATTR_MASK;
+ if (((is_playback && attr == EP_ATTR_ASYNC) ||
+ (! is_playback && attr == EP_ATTR_ADAPTIVE)) &&
+ altsd->bNumEndpoints >= 2) {
+ /* check sync-pipe endpoint */
+ /* ... and check descriptor size before accessing bSynchAddress
+ because there is a version of the SB Audigy 2 NX firmware lacking
+ the audio fields in the endpoint descriptors */
+ if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
+ (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
+ get_endpoint(alts, 1)->bSynchAddress != 0)) {
+ snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
+ dev->devnum, fmt->iface, fmt->altsetting);
+ return -EINVAL;
+ }
+ ep = get_endpoint(alts, 1)->bEndpointAddress;
+ if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
+ (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
+ (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
+ snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
+ dev->devnum, fmt->iface, fmt->altsetting);
+ return -EINVAL;
+ }
+ ep &= USB_ENDPOINT_NUMBER_MASK;
+ if (is_playback)
+ subs->syncpipe = usb_rcvisocpipe(dev, ep);
+ else
+ subs->syncpipe = usb_sndisocpipe(dev, ep);
+ subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
+ }
+
+ /* always fill max packet size */
+ if (fmt->attributes & EP_CS_ATTR_FILL_MAX)
+ subs->fill_max = 1;
+
+ if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0)
+ return err;
+
+ subs->cur_audiofmt = fmt;
+
+#if 0
+ printk("setting done: format = %d, rate = %d, channels = %d\n",
+ fmt->format, fmt->rate, fmt->channels);
+ printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
+ subs->datapipe, subs->syncpipe);
+#endif
+
+ return 0;
+}
+
+/*
+ * hw_params callback
+ *
+ * allocate a buffer and set the given audio format.
+ *
+ * so far we use a physically linear buffer although packetize transfer
+ * doesn't need a continuous area.
+ * if sg buffer is supported on the later version of alsa, we'll follow
+ * that.
+ */
+static int snd_usb_hw_params(snd_pcm_substream_t *substream,
+ snd_pcm_hw_params_t *hw_params)
+{
+ snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
+ struct audioformat *fmt;
+ unsigned int channels, rate, format;
+ int ret, changed;
+
+ ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+ if (ret < 0)
+ return ret;
+
+ format = params_format(hw_params);
+ rate = params_rate(hw_params);
+ channels = params_channels(hw_params);
+ fmt = find_format(subs, format, rate, channels);
+ if (! fmt) {
+ snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
+ snd_pcm_format_name(format), rate, channels);
+ return -EINVAL;
+ }
+
+ changed = subs->cur_audiofmt != fmt ||
+ subs->period_bytes != params_period_bytes(hw_params) ||
+ subs->cur_rate != rate;
+ if ((ret = set_format(subs, fmt)) < 0)
+ return ret;
+
+ if (subs->cur_rate != rate) {
+ struct usb_host_interface *alts;
+ struct usb_interface *iface;
+ iface = usb_ifnum_to_if(subs->dev, fmt->iface);
+ alts = &iface->altsetting[fmt->altset_idx];
+ ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate);
+ if (ret < 0)
+ return ret;
+ subs->cur_rate = rate;
+ }
+
+ if (changed) {
+ /* format changed */
+ release_substream_urbs(subs, 0);
+ /* influenced: period_bytes, channels, rate, format, */
+ ret = init_substream_urbs(subs, params_period_bytes(hw_params),
+ params_rate(hw_params),
+ snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params));
+ }
+
+ return ret;
+}
+
+/*
+ * hw_free callback
+ *
+ * reset the audio format and release the buffer
+ */
+static int snd_usb_hw_free(snd_pcm_substream_t *substream)
+{
+ snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
+
+ subs->cur_audiofmt = NULL;
+ subs->cur_rate = 0;
+ subs->period_bytes = 0;
+ release_substream_urbs(subs, 0);
+ return snd_pcm_lib_free_pages(substream);
+}
+
+/*
+ * prepare callback
+ *
+ * only a few subtle things...
+ */
+static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data;
+
+ if (! subs->cur_audiofmt) {
+ snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
+ return -ENXIO;
+ }
+
+ /* some unit conversions in runtime */
+ subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
+ subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
+
+ /* reset the pointer */
+ subs->hwptr = 0;
+ subs->hwptr_done = 0;
+ subs->transfer_sched = 0;
+ subs->transfer_done = 0;
+ subs->phase = 0;
+
+ /* clear urbs (to be sure) */
+ deactivate_urbs(subs, 0, 1);
+ wait_clear_urbs(subs);
+
+ return 0;
+}
+
+static snd_pcm_hardware_t snd_usb_playback =
+{
+ .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .buffer_bytes_max = (128*1024),
+ .period_bytes_min = 64,
+ .period_bytes_max = (128*1024),
+ .periods_min = 2,
+ .periods_max = 1024,
+};
+
+static snd_pcm_hardware_t snd_usb_capture =
+{
+ .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .buffer_bytes_max = (128*1024),
+ .period_bytes_min = 64,
+ .period_bytes_max = (128*1024),
+ .periods_min = 2,
+ .periods_max = 1024,
+};
+
+/*
+ * h/w constraints
+ */
+
+#ifdef HW_CONST_DEBUG
+#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args)
+#else
+#define hwc_debug(fmt, args...) /**/
+#endif
+
+static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
+{
+ snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+ snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+ snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+
+ /* check the format */
+ if (! snd_mask_test(fmts, fp->format)) {
+ hwc_debug(" > check: no supported format %d\n", fp->format);
+ return 0;
+ }
+ /* check the channels */
+ if (fp->channels < ct->min || fp->channels > ct->max) {
+ hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max);
+ return 0;
+ }
+ /* check the rate is within the range */
+ if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) {
+ hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max);
+ return 0;
+ }
+ if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) {
+ hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min);
+ return 0;
+ }
+ return 1;
+}
+
+static int hw_rule_rate(snd_pcm_hw_params_t *params,
+ snd_pcm_hw_rule_t *rule)
+{
+ snd_usb_substream_t *subs = rule->private;
+ struct list_head *p;
+ snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+ unsigned int rmin, rmax;
+ int changed;
+
+ hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
+ changed = 0;
+ rmin = rmax = 0;
+ list_for_each(p, &subs->fmt_list) {
+ struct audioformat *fp;
+ fp = list_entry(p, struct audioformat, list);
+ if (! hw_check_valid_format(params, fp))
+ continue;
+ if (changed++) {
+ if (rmin > fp->rate_min)
+ rmin = fp->rate_min;
+ if (rmax < fp->rate_max)
+ rmax = fp->rate_max;
+ } else {
+ rmin = fp->rate_min;
+ rmax = fp->rate_max;
+ }
+ }
+
+ if (! changed) {
+ hwc_debug(" --> get empty\n");
+ it->empty = 1;
+ return -EINVAL;
+ }
+
+ changed = 0;
+ if (it->min < rmin) {
+ it->min = rmin;
+ it->openmin = 0;
+ changed = 1;
+ }
+ if (it->max > rmax) {
+ it->max = rmax;
+ it->openmax = 0;
+ changed = 1;
+ }
+ if (snd_interval_checkempty(it)) {
+ it->empty = 1;
+ return -EINVAL;
+ }
+ hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
+ return changed;
+}
+
+
+static int hw_rule_channels(snd_pcm_hw_params_t *params,
+ snd_pcm_hw_rule_t *rule)
+{
+ snd_usb_substream_t *subs = rule->private;
+ struct list_head *p;
+ snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+ unsigned int rmin, rmax;
+ int changed;
+
+ hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
+ changed = 0;
+ rmin = rmax = 0;
+ list_for_each(p, &subs->fmt_list) {
+ struct audioformat *fp;
+ fp = list_entry(p, struct audioformat, list);
+ if (! hw_check_valid_format(params, fp))
+ continue;
+ if (changed++) {
+ if (rmin > fp->channels)
+ rmin = fp->channels;
+ if (rmax < fp->channels)
+ rmax = fp->channels;
+ } else {
+ rmin = fp->channels;
+ rmax = fp->channels;
+ }
+ }
+
+ if (! changed) {
+ hwc_debug(" --> get empty\n");
+ it->empty = 1;
+ return -EINVAL;
+ }
+
+ changed = 0;
+ if (it->min < rmin) {
+ it->min = rmin;
+ it->openmin = 0;
+ changed = 1;
+ }
+ if (it->max > rmax) {
+ it->max = rmax;
+ it->openmax = 0;
+ changed = 1;
+ }
+ if (snd_interval_checkempty(it)) {
+ it->empty = 1;
+ return -EINVAL;
+ }
+ hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed);
+ return changed;
+}
+
+static int hw_rule_format(snd_pcm_hw_params_t *params,
+ snd_pcm_hw_rule_t *rule)
+{
+ snd_usb_substream_t *subs = rule->private;
+ struct list_head *p;
+ snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+ u64 fbits;
+ u32 oldbits[2];
+ int changed;
+
+ hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]);
+ fbits = 0;
+ list_for_each(p, &subs->fmt_list) {
+ struct audioformat *fp;
+ fp = list_entry(p, struct audioformat, list);
+ if (! hw_check_valid_format(params, fp))
+ continue;
+ fbits |= (1ULL << fp->format);
+ }
+
+ oldbits[0] = fmt->bits[0];
+ oldbits[1] = fmt->bits[1];
+ fmt->bits[0] &= (u32)fbits;
+ fmt->bits[1] &= (u32)(fbits >> 32);
+ if (! fmt->bits[0] && ! fmt->bits[1]) {
+ hwc_debug(" --> get empty\n");
+ return -EINVAL;
+ }
+ changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]);
+ hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed);
+ return changed;
+}
+
+#define MAX_MASK 64
+
+/*
+ * check whether the registered audio formats need special hw-constraints
+ */
+static int check_hw_params_convention(snd_usb_substream_t *subs)
+{
+ int i;
+ u32 *channels;
+ u32 *rates;
+ u32 cmaster, rmaster;
+ u32 rate_min = 0, rate_max = 0;
+ struct list_head *p;
+ int err = 1;
+
+ channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
+ rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
+
+ list_for_each(p, &subs->fmt_list) {
+ struct audioformat *f;
+ f = list_entry(p, struct audioformat, list);
+ /* unconventional channels? */
+ if (f->channels > 32)
+ goto __out;
+ /* continuous rate min/max matches? */
+ if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
+ if (rate_min && f->rate_min != rate_min)
+ goto __out;
+ if (rate_max && f->rate_max != rate_max)
+ goto __out;
+ rate_min = f->rate_min;
+ rate_max = f->rate_max;
+ }
+ /* combination of continuous rates and fixed rates? */
+ if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
+ if (f->rates != rates[f->format])
+ goto __out;
+ }
+ if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
+ if (rates[f->format] && rates[f->format] != f->rates)
+ goto __out;
+ }
+ channels[f->format] |= (1 << f->channels);
+ rates[f->format] |= f->rates;
+ }
+ /* check whether channels and rates match for all formats */
+ cmaster = rmaster = 0;
+ for (i = 0; i < MAX_MASK; i++) {
+ if (cmaster != channels[i] && cmaster && channels[i])
+ goto __out;
+ if (rmaster != rates[i] && rmaster && rates[i])
+ goto __out;
+ if (channels[i])
+ cmaster = channels[i];
+ if (rates[i])
+ rmaster = rates[i];
+ }
+ /* check whether channels match for all distinct rates */
+ memset(channels, 0, MAX_MASK * sizeof(u32));
+ list_for_each(p, &subs->fmt_list) {
+ struct audioformat *f;
+ f = list_entry(p, struct audioformat, list);
+ if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
+ continue;
+ for (i = 0; i < 32; i++) {
+ if (f->rates & (1 << i))
+ channels[i] |= (1 << f->channels);
+ }
+ }
+ cmaster = 0;
+ for (i = 0; i < 32; i++) {
+ if (cmaster != channels[i] && cmaster && channels[i])
+ goto __out;
+ if (channels[i])
+ cmaster = channels[i];
+ }
+ err = 0;
+
+ __out:
+ kfree(channels);
+ kfree(rates);
+ return err;
+}
+
+
+/*
+ * set up the runtime hardware information.
+ */
+
+static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
+{
+ struct list_head *p;
+ int err;
+
+ runtime->hw.formats = subs->formats;
+
+ runtime->hw.rate_min = 0x7fffffff;
+ runtime->hw.rate_max = 0;
+ runtime->hw.channels_min = 256;
+ runtime->hw.channels_max = 0;
+ runtime->hw.rates = 0;
+ /* check min/max rates and channels */
+ list_for_each(p, &subs->fmt_list) {
+ struct audioformat *fp;
+ fp = list_entry(p, struct audioformat, list);
+ runtime->hw.rates |= fp->rates;
+ if (runtime->hw.rate_min > fp->rate_min)
+ runtime->hw.rate_min = fp->rate_min;
+ if (runtime->hw.rate_max < fp->rate_max)
+ runtime->hw.rate_max = fp->rate_max;
+ if (runtime->hw.channels_min > fp->channels)
+ runtime->hw.channels_min = fp->channels;
+ if (runtime->hw.channels_max < fp->channels)
+ runtime->hw.channels_max = fp->channels;
+ if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) {
+ /* FIXME: there might be more than one audio formats... */
+ runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
+ fp->frame_size;
+ }
+ }
+
+ /* set the period time minimum 1ms */
+ snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
+ 1000 * MIN_PACKS_URB,
+ /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
+
+ if (check_hw_params_convention(subs)) {
+ hwc_debug("setting extra hw constraints...\n");
+ if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+ hw_rule_rate, subs,
+ SNDRV_PCM_HW_PARAM_FORMAT,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ -1)) < 0)
+ return err;
+ if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+ hw_rule_channels, subs,
+ SNDRV_PCM_HW_PARAM_FORMAT,
+ SNDRV_PCM_HW_PARAM_RATE,
+ -1)) < 0)
+ return err;
+ if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
+ hw_rule_format, subs,
+ SNDRV_PCM_HW_PARAM_RATE,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ -1)) < 0)
+ return err;
+ }
+ return 0;
+}
+
+static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
+ snd_pcm_hardware_t *hw)
+{
+ snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ snd_usb_substream_t *subs = &as->substream[direction];
+
+ subs->interface = -1;
+ subs->format = 0;
+ runtime->hw = *hw;
+ runtime->private_data = subs;
+ subs->pcm_substream = substream;
+ return setup_hw_info(runtime, subs);
+}
+
+static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
+{
+ snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
+ snd_usb_substream_t *subs = &as->substream[direction];
+
+ if (subs->interface >= 0) {
+ usb_set_interface(subs->dev, subs->interface, 0);
+ subs->interface = -1;
+ }
+ subs->pcm_substream = NULL;
+ return 0;
+}
+
+static int snd_usb_playback_open(snd_pcm_substream_t *substream)
+{
+ return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
+}
+
+static int snd_usb_playback_close(snd_pcm_substream_t *substream)
+{
+ return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
+}
+
+static int snd_usb_capture_open(snd_pcm_substream_t *substream)
+{
+ return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
+}
+
+static int snd_usb_capture_close(snd_pcm_substream_t *substream)
+{
+ return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
+}
+
+static snd_pcm_ops_t snd_usb_playback_ops = {
+ .open = snd_usb_playback_open,
+ .close = snd_usb_playback_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_usb_hw_params,
+ .hw_free = snd_usb_hw_free,
+ .prepare = snd_usb_pcm_prepare,
+ .trigger = snd_usb_pcm_trigger,
+ .pointer = snd_usb_pcm_pointer,
+};
+
+static snd_pcm_ops_t snd_usb_capture_ops = {
+ .open = snd_usb_capture_open,
+ .close = snd_usb_capture_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_usb_hw_params,
+ .hw_free = snd_usb_hw_free,
+ .prepare = snd_usb_pcm_prepare,
+ .trigger = snd_usb_pcm_trigger,
+ .pointer = snd_usb_pcm_pointer,
+};
+
+
+
+/*
+ * helper functions
+ */
+
+/*
+ * combine bytes and get an integer value
+ */
+unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size)
+{
+ switch (size) {
+ case 1: return *bytes;
+ case 2: return combine_word(bytes);
+ case 3: return combine_triple(bytes);
+ case 4: return combine_quad(bytes);
+ default: return 0;
+ }
+}
+
+/*
+ * parse descriptor buffer and return the pointer starting the given
+ * descriptor type.
+ */
+void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype)
+{
+ u8 *p, *end, *next;
+
+ p = descstart;
+ end = p + desclen;
+ for (; p < end;) {
+ if (p[0] < 2)
+ return NULL;
+ next = p + p[0];
+ if (next > end)
+ return NULL;
+ if (p[1] == dtype && (!after || (void *)p > after)) {
+ return p;
+ }
+ p = next;
+ }
+ return NULL;
+}
+
+/*
+ * find a class-specified interface descriptor with the given subtype.
+ */
+void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype)
+{
+ unsigned char *p = after;
+
+ while ((p = snd_usb_find_desc(buffer, buflen, p,
+ USB_DT_CS_INTERFACE)) != NULL) {
+ if (p[0] >= 3 && p[2] == dsubtype)
+ return p;
+ }
+ return NULL;
+}
+
+/*
+ * Wrapper for usb_control_msg().
+ * Allocates a temp buffer to prevent dmaing from/to the stack.
+ */
+int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
+ __u8 requesttype, __u16 value, __u16 index, void *data,
+ __u16 size, int timeout)
+{
+ int err;
+ void *buf = NULL;
+
+ if (size > 0) {
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ memcpy(buf, data, size);
+ }
+ err = usb_control_msg(dev, pipe, request, requesttype,
+ value, index, buf, size, timeout);
+ if (size > 0) {
+ memcpy(data, buf, size);
+ kfree(buf);
+ }
+ return err;
+}
+
+
+/*
+ * entry point for linux usb interface
+ */
+
+static int usb_audio_probe(struct usb_interface *intf,
+ const struct usb_device_id *id);
+static void usb_audio_disconnect(struct usb_interface *intf);
+
+static struct usb_device_id usb_audio_ids [] = {
+#include "usbquirks.h"
+ { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, usb_audio_ids);
+
+static struct usb_driver usb_audio_driver = {
+ .owner = THIS_MODULE,
+ .name = "snd-usb-audio",
+ .probe = usb_audio_probe,
+ .disconnect = usb_audio_disconnect,
+ .id_table = usb_audio_ids,
+};
+
+
+/*
+ * proc interface for list the supported pcm formats
+ */
+static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
+{
+ struct list_head *p;
+ static char *sync_types[4] = {
+ "NONE", "ASYNC", "ADAPTIVE", "SYNC"
+ };
+
+ list_for_each(p, &subs->fmt_list) {
+ struct audioformat *fp;
+ fp = list_entry(p, struct audioformat, list);
+ snd_iprintf(buffer, " Interface %d\n", fp->iface);
+ snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
+ snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format));
+ snd_iprintf(buffer, " Channels: %d\n", fp->channels);
+ snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
+ fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
+ fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
+ sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]);
+ if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
+ snd_iprintf(buffer, " Rates: %d - %d (continuous)\n",
+ fp->rate_min, fp->rate_max);
+ } else {
+ unsigned int i;
+ snd_iprintf(buffer, " Rates: ");
+ for (i = 0; i < fp->nr_rates; i++) {
+ if (i > 0)
+ snd_iprintf(buffer, ", ");
+ snd_iprintf(buffer, "%d", fp->rate_table[i]);
+ }
+ snd_iprintf(buffer, "\n");
+ }
+ // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
+ // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
+ }
+}
+
+static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
+{
+ if (subs->running) {
+ unsigned int i;
+ snd_iprintf(buffer, " Status: Running\n");
+ snd_iprintf(buffer, " Interface = %d\n", subs->interface);
+ snd_iprintf(buffer, " Altset = %d\n", subs->format);
+ snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs);
+ for (i = 0; i < subs->nurbs; i++)
+ snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
+ snd_iprintf(buffer, "]\n");
+ snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
+ snd_iprintf(buffer, " Momentary freq = %u Hz\n",
+ snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
+ ? get_full_speed_hz(subs->freqm)
+ : get_high_speed_hz(subs->freqm));
+ } else {
+ snd_iprintf(buffer, " Status: Stop\n");
+ }
+}
+
+static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
+{
+ snd_usb_stream_t *stream = entry->private_data;
+
+ snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
+
+ if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
+ snd_iprintf(buffer, "\nPlayback:\n");
+ proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
+ proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
+ }
+ if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
+ snd_iprintf(buffer, "\nCapture:\n");
+ proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
+ proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
+ }
+}
+
+static void proc_pcm_format_add(snd_usb_stream_t *stream)
+{
+ snd_info_entry_t *entry;
+ char name[32];
+ snd_card_t *card = stream->chip->card;
+
+ sprintf(name, "stream%d", stream->pcm_index);
+ if (! snd_card_proc_new(card, name, &entry))
+ snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
+}
+
+
+/*
+ * initialize the substream instance.
+ */
+
+static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
+{
+ snd_usb_substream_t *subs = &as->substream[stream];
+
+ INIT_LIST_HEAD(&subs->fmt_list);
+ spin_lock_init(&subs->lock);
+
+ subs->stream = as;
+ subs->direction = stream;
+ subs->dev = as->chip->dev;
+ if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
+ subs->ops = audio_urb_ops[stream];
+ else
+ subs->ops = audio_urb_ops_high_speed[stream];
+ snd_pcm_lib_preallocate_pages(as->pcm->streams[stream].substream,
+ SNDRV_DMA_TYPE_CONTINUOUS,
+ snd_dma_continuous_data(GFP_KERNEL),
+ 64 * 1024, 128 * 1024);
+ snd_pcm_set_ops(as->pcm, stream,
+ stream == SNDRV_PCM_STREAM_PLAYBACK ?
+ &snd_usb_playback_ops : &snd_usb_capture_ops);
+
+ list_add_tail(&fp->list, &subs->fmt_list);
+ subs->formats |= 1ULL << fp->format;
+ subs->endpoint = fp->endpoint;
+ subs->num_formats++;
+ subs->fmt_type = fp->fmt_type;
+}
+
+
+/*
+ * free a substream
+ */
+static void free_substream(snd_usb_substream_t *subs)
+{
+ struct list_head *p, *n;
+
+ if (! subs->num_formats)
+ return; /* not initialized */
+ list_for_each_safe(p, n, &subs->fmt_list) {
+ struct audioformat *fp = list_entry(p, struct audioformat, list);
+ kfree(fp->rate_table);
+ kfree(fp);
+ }
+}
+
+
+/*
+ * free a usb stream instance
+ */
+static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
+{
+ free_substream(&stream->substream[0]);
+ free_substream(&stream->substream[1]);
+ list_del(&stream->list);
+ kfree(stream);
+}
+
+static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
+{
+ snd_usb_stream_t *stream = pcm->private_data;
+ if (stream) {
+ stream->pcm = NULL;
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+ snd_usb_audio_stream_free(stream);
+ }
+}
+
+
+/*
+ * add this endpoint to the chip instance.
+ * if a stream with the same endpoint already exists, append to it.
+ * if not, create a new pcm stream.
+ */
+static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
+{
+ struct list_head *p;
+ snd_usb_stream_t *as;
+ snd_usb_substream_t *subs;
+ snd_pcm_t *pcm;
+ int err;
+
+ list_for_each(p, &chip->pcm_list) {
+ as = list_entry(p, snd_usb_stream_t, list);
+ if (as->fmt_type != fp->fmt_type)
+ continue;
+ subs = &as->substream[stream];
+ if (! subs->endpoint)
+ continue;
+ if (subs->endpoint == fp->endpoint) {
+ list_add_tail(&fp->list, &subs->fmt_list);
+ subs->num_formats++;
+ subs->formats |= 1ULL << fp->format;
+ return 0;
+ }
+ }
+ /* look for an empty stream */
+ list_for_each(p, &chip->pcm_list) {
+ as = list_entry(p, snd_usb_stream_t, list);
+ if (as->fmt_type != fp->fmt_type)
+ continue;
+ subs = &as->substream[stream];
+ if (subs->endpoint)
+ continue;
+ err = snd_pcm_new_stream(as->pcm, stream, 1);
+ if (err < 0)
+ return err;
+ init_substream(as, stream, fp);
+ return 0;
+ }
+
+ /* create a new pcm */
+ as = kmalloc(sizeof(*as), GFP_KERNEL);
+ if (! as)
+ return -ENOMEM;
+ memset(as, 0, sizeof(*as));
+ as->pcm_index = chip->pcm_devs;
+ as->chip = chip;
+ as->fmt_type = fp->fmt_type;
+ err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
+ stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
+ stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
+ &pcm);
+ if (err < 0) {
+ kfree(as);
+ return err;
+ }
+ as->pcm = pcm;
+ pcm->private_data = as;
+ pcm->private_free = snd_usb_audio_pcm_free;
+ pcm->info_flags = 0;
+ if (chip->pcm_devs > 0)
+ sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
+ else
+ strcpy(pcm->name, "USB Audio");
+
+ init_substream(as, stream, fp);
+
+ list_add(&as->list, &chip->pcm_list);
+ chip->pcm_devs++;
+
+ proc_pcm_format_add(as);
+
+ return 0;
+}
+
+
+/*
+ * check if the device uses big-endian samples
+ */
+static int is_big_endian_format(struct usb_device *dev, struct audioformat *fp)
+{
+ /* M-Audio */
+ if (le16_to_cpu(dev->descriptor.idVendor) == 0x0763) {
+ /* Quattro: captured data only */
+ if (le16_to_cpu(dev->descriptor.idProduct) == 0x2001 &&
+ fp->endpoint & USB_DIR_IN)
+ return 1;
+ /* Audiophile USB */
+ if (le16_to_cpu(dev->descriptor.idProduct) == 0x2003)
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * parse the audio format type I descriptor
+ * and returns the corresponding pcm format
+ *
+ * @dev: usb device
+ * @fp: audioformat record
+ * @format: the format tag (wFormatTag)
+ * @fmt: the format type descriptor
+ */
+static int parse_audio_format_i_type(struct usb_device *dev, struct audioformat *fp,
+ int format, unsigned char *fmt)
+{
+ int pcm_format;
+ int sample_width, sample_bytes;
+
+ /* FIXME: correct endianess and sign? */
+ pcm_format = -1;
+ sample_width = fmt[6];
+ sample_bytes = fmt[5];
+ switch (format) {
+ case 0: /* some devices don't define this correctly... */
+ snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
+ dev->devnum, fp->iface, fp->altsetting);
+ /* fall-through */
+ case USB_AUDIO_FORMAT_PCM:
+ if (sample_width > sample_bytes * 8) {
+ snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
+ dev->devnum, fp->iface, fp->altsetting,
+ sample_width, sample_bytes);
+ }
+ /* check the format byte size */
+ switch (fmt[5]) {
+ case 1:
+ pcm_format = SNDRV_PCM_FORMAT_S8;
+ break;
+ case 2:
+ if (is_big_endian_format(dev, fp))
+ pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
+ else
+ pcm_format = SNDRV_PCM_FORMAT_S16_LE;
+ break;
+ case 3:
+ if (is_big_endian_format(dev, fp))
+ pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
+ else
+ pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
+ break;
+ case 4:
+ pcm_format = SNDRV_PCM_FORMAT_S32_LE;
+ break;
+ default:
+ snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
+ dev->devnum, fp->iface, fp->altsetting, sample_width, sample_bytes);
+ break;
+ }
+ break;
+ case USB_AUDIO_FORMAT_PCM8:
+ /* Dallas DS4201 workaround */
+ if (le16_to_cpu(dev->descriptor.idVendor) == 0x04fa &&
+ le16_to_cpu(dev->descriptor.idProduct) == 0x4201)
+ pcm_format = SNDRV_PCM_FORMAT_S8;
+ else
+ pcm_format = SNDRV_PCM_FORMAT_U8;
+ break;
+ case USB_AUDIO_FORMAT_IEEE_FLOAT:
+ pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
+ break;
+ case USB_AUDIO_FORMAT_ALAW:
+ pcm_format = SNDRV_PCM_FORMAT_A_LAW;
+ break;
+ case USB_AUDIO_FORMAT_MU_LAW:
+ pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
+ break;
+ default:
+ snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
+ dev->devnum, fp->iface, fp->altsetting, format);
+ break;
+ }
+ return pcm_format;
+}
+
+
+/*
+ * parse the format descriptor and stores the possible sample rates
+ * on the audioformat table.
+ *
+ * @dev: usb device
+ * @fp: audioformat record
+ * @fmt: the format descriptor
+ * @offset: the start offset of descriptor pointing the rate type
+ * (7 for type I and II, 8 for type II)
+ */
+static int parse_audio_format_rates(struct usb_device *dev, struct audioformat *fp,
+ unsigned char *fmt, int offset)
+{
+ int nr_rates = fmt[offset];
+ if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
+ snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
+ dev->devnum, fp->iface, fp->altsetting);
+ return -1;
+ }
+
+ if (nr_rates) {
+ /*
+ * build the rate table and bitmap flags
+ */
+ int r, idx, c;
+ /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
+ static unsigned int conv_rates[] = {
+ 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
+ 64000, 88200, 96000, 176400, 192000
+ };
+ fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
+ if (fp->rate_table == NULL) {
+ snd_printk(KERN_ERR "cannot malloc\n");
+ return -1;
+ }
+
+ fp->nr_rates = nr_rates;
+ fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
+ for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
+ unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
+ if (rate < fp->rate_min)
+ fp->rate_min = rate;
+ else if (rate > fp->rate_max)
+ fp->rate_max = rate;
+ for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
+ if (rate == conv_rates[c]) {
+ fp->rates |= (1 << c);
+ break;
+ }
+ }
+ }
+ } else {
+ /* continuous rates */
+ fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
+ fp->rate_min = combine_triple(&fmt[offset + 1]);
+ fp->rate_max = combine_triple(&fmt[offset + 4]);
+ }
+ return 0;
+}
+
+/*
+ * parse the format type I and III descriptors
+ */
+static int parse_audio_format_i(struct usb_device *dev, struct audioformat *fp,
+ int format, unsigned char *fmt)
+{
+ int pcm_format;
+
+ if (fmt[3] == USB_FORMAT_TYPE_III) {
+ /* FIXME: the format type is really IECxxx
+ * but we give normal PCM format to get the existing
+ * apps working...
+ */
+ pcm_format = SNDRV_PCM_FORMAT_S16_LE;
+ } else {
+ pcm_format = parse_audio_format_i_type(dev, fp, format, fmt);
+ if (pcm_format < 0)
+ return -1;
+ }
+ fp->format = pcm_format;
+ fp->channels = fmt[4];
+ if (fp->channels < 1) {
+ snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
+ dev->devnum, fp->iface, fp->altsetting, fp->channels);
+ return -1;
+ }
+ return parse_audio_format_rates(dev, fp, fmt, 7);
+}
+
+/*
+ * prase the format type II descriptor
+ */
+static int parse_audio_format_ii(struct usb_device *dev, struct audioformat *fp,
+ int format, unsigned char *fmt)
+{
+ int brate, framesize;
+ switch (format) {
+ case USB_AUDIO_FORMAT_AC3:
+ /* FIXME: there is no AC3 format defined yet */
+ // fp->format = SNDRV_PCM_FORMAT_AC3;
+ fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */
+ break;
+ case USB_AUDIO_FORMAT_MPEG:
+ fp->format = SNDRV_PCM_FORMAT_MPEG;
+ break;
+ default:
+ snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
+ dev->devnum, fp->iface, fp->altsetting, format);
+ fp->format = SNDRV_PCM_FORMAT_MPEG;
+ break;
+ }
+ fp->channels = 1;
+ brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */
+ framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
+ snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
+ fp->frame_size = framesize;
+ return parse_audio_format_rates(dev, fp, fmt, 8); /* fmt[8..] sample rates */
+}
+
+static int parse_audio_format(struct usb_device *dev, struct audioformat *fp,
+ int format, unsigned char *fmt, int stream)
+{
+ int err;
+
+ switch (fmt[3]) {
+ case USB_FORMAT_TYPE_I:
+ case USB_FORMAT_TYPE_III:
+ err = parse_audio_format_i(dev, fp, format, fmt);
+ break;
+ case USB_FORMAT_TYPE_II:
+ err = parse_audio_format_ii(dev, fp, format, fmt);
+ break;
+ default:
+ snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
+ dev->devnum, fp->iface, fp->altsetting, fmt[3]);
+ return -1;
+ }
+ fp->fmt_type = fmt[3];
+ if (err < 0)
+ return err;
+#if 1
+ /* FIXME: temporary hack for extigy */
+ /* extigy apparently supports sample rates other than 48k
+ * but not in ordinary way. so we enable only 48k atm.
+ */
+ if (le16_to_cpu(dev->descriptor.idVendor) == 0x041e &&
+ le16_to_cpu(dev->descriptor.idProduct) == 0x3000) {
+ if (fmt[3] == USB_FORMAT_TYPE_I &&
+ stream == SNDRV_PCM_STREAM_PLAYBACK &&
+ fp->rates != SNDRV_PCM_RATE_48000)
+ return -1; /* use 48k only */
+ }
+#endif
+ return 0;
+}
+
+static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
+{
+ struct usb_device *dev;
+ struct usb_interface *iface;
+ struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
+ int i, altno, err, stream;
+ int format;
+ struct audioformat *fp;
+ unsigned char *fmt, *csep;
+
+ dev = chip->dev;
+
+ /* parse the interface's altsettings */
+ iface = usb_ifnum_to_if(dev, iface_no);
+ for (i = 0; i < iface->num_altsetting; i++) {
+ alts = &iface->altsetting[i];
+ altsd = get_iface_desc(alts);
+ /* skip invalid one */
+ if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
+ altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
+ (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING &&
+ altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
+ altsd->bNumEndpoints < 1 ||
+ le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
+ continue;
+ /* must be isochronous */
+ if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
+ USB_ENDPOINT_XFER_ISOC)
+ continue;
+ /* check direction */
+ stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
+ SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+ altno = altsd->bAlternateSetting;
+
+ /* get audio formats */
+ fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
+ if (!fmt) {
+ snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n",
+ dev->devnum, iface_no, altno);
+ continue;
+ }
+
+ if (fmt[0] < 7) {
+ snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n",
+ dev->devnum, iface_no, altno);
+ continue;
+ }
+
+ format = (fmt[6] << 8) | fmt[5]; /* remember the format value */
+
+ /* get format type */
+ fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, FORMAT_TYPE);
+ if (!fmt) {
+ snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n",
+ dev->devnum, iface_no, altno);
+ continue;
+ }
+ if (fmt[0] < 8) {
+ snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
+ dev->devnum, iface_no, altno);
+ continue;
+ }
+
+ csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
+ /* Creamware Noah has this descriptor after the 2nd endpoint */
+ if (!csep && altsd->bNumEndpoints >= 2)
+ csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
+ if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
+ snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
+ dev->devnum, iface_no, altno);
+ continue;
+ }
+
+ fp = kmalloc(sizeof(*fp), GFP_KERNEL);
+ if (! fp) {
+ snd_printk(KERN_ERR "cannot malloc\n");
+ return -ENOMEM;
+ }
+
+ memset(fp, 0, sizeof(*fp));
+ fp->iface = iface_no;
+ fp->altsetting = altno;
+ fp->altset_idx = i;
+ fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
+ fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+ /* FIXME: decode wMaxPacketSize of high bandwith endpoints */
+ fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+ fp->attributes = csep[3];
+
+ /* some quirks for attributes here */
+
+ /* workaround for AudioTrak Optoplay */
+ if (le16_to_cpu(dev->descriptor.idVendor) == 0x0a92 &&
+ le16_to_cpu(dev->descriptor.idProduct) == 0x0053) {
+ /* Optoplay sets the sample rate attribute although
+ * it seems not supporting it in fact.
+ */
+ fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
+ }
+
+ /* workaround for M-Audio Audiophile USB */
+ if (le16_to_cpu(dev->descriptor.idVendor) == 0x0763 &&
+ le16_to_cpu(dev->descriptor.idProduct) == 0x2003) {
+ /* doesn't set the sample rate attribute, but supports it */
+ fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
+ }
+
+ /*
+ * plantronics headset and Griffin iMic have set adaptive-in
+ * although it's really not...
+ */
+ if ((le16_to_cpu(dev->descriptor.idVendor) == 0x047f &&
+ le16_to_cpu(dev->descriptor.idProduct) == 0x0ca1) ||
+ /* Griffin iMic (note that there is an older model 77d:223) */
+ (le16_to_cpu(dev->descriptor.idVendor) == 0x077d &&
+ le16_to_cpu(dev->descriptor.idProduct) == 0x07af)) {
+ fp->ep_attr &= ~EP_ATTR_MASK;
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
+ fp->ep_attr |= EP_ATTR_ADAPTIVE;
+ else
+ fp->ep_attr |= EP_ATTR_SYNC;
+ }
+
+ /* ok, let's parse further... */
+ if (parse_audio_format(dev, fp, format, fmt, stream) < 0) {
+ kfree(fp->rate_table);
+ kfree(fp);
+ continue;
+ }
+
+ snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
+ err = add_audio_endpoint(chip, stream, fp);
+ if (err < 0) {
+ kfree(fp->rate_table);
+ kfree(fp);
+ return err;
+ }
+ /* try to set the interface... */
+ usb_set_interface(chip->dev, iface_no, altno);
+ init_usb_pitch(chip->dev, iface_no, alts, fp);
+ init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
+ }
+ return 0;
+}
+
+
+/*
+ * disconnect streams
+ * called from snd_usb_audio_disconnect()
+ */
+static void snd_usb_stream_disconnect(struct list_head *head, struct usb_driver *driver)
+{
+ int idx;
+ snd_usb_stream_t *as;
+ snd_usb_substream_t *subs;
+
+ as = list_entry(head, snd_usb_stream_t, list);
+ for (idx = 0; idx < 2; idx++) {
+ subs = &as->substream[idx];
+ if (!subs->num_formats)
+ return;
+ release_substream_urbs(subs, 1);
+ subs->interface = -1;
+ }
+}
+
+/*
+ * parse audio control descriptor and create pcm/midi streams
+ */
+static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
+{
+ struct usb_device *dev = chip->dev;
+ struct usb_host_interface *host_iface;
+ struct usb_interface *iface;
+ unsigned char *p1;
+ int i, j;
+
+ /* find audiocontrol interface */
+ host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
+ if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) {
+ snd_printk(KERN_ERR "cannot find HEADER\n");
+ return -EINVAL;
+ }
+ if (! p1[7] || p1[0] < 8 + p1[7]) {
+ snd_printk(KERN_ERR "invalid HEADER\n");
+ return -EINVAL;
+ }
+
+ /*
+ * parse all USB audio streaming interfaces
+ */
+ for (i = 0; i < p1[7]; i++) {
+ struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
+ j = p1[8 + i];
+ iface = usb_ifnum_to_if(dev, j);
+ if (!iface) {
+ snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (usb_interface_claimed(iface)) {
+ snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j);
+ continue;
+ }
+ alts = &iface->altsetting[0];
+ altsd = get_iface_desc(alts);
+ if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
+ altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
+ altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
+ if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
+ snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
+ continue;
+ }
+ usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
+ continue;
+ }
+ if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
+ altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
+ altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) {
+ snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass);
+ /* skip non-supported classes */
+ continue;
+ }
+ if (! parse_audio_endpoints(chip, j)) {
+ usb_set_interface(dev, j, 0); /* reset the current interface */
+ usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * create a stream for an endpoint/altsetting without proper descriptors
+ */
+static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
+ struct usb_interface *iface,
+ const snd_usb_audio_quirk_t *quirk)
+{
+ struct audioformat *fp;
+ struct usb_host_interface *alts;
+ int stream, err;
+ int *rate_table = NULL;
+
+ fp = kmalloc(sizeof(*fp), GFP_KERNEL);
+ if (! fp) {
+ snd_printk(KERN_ERR "cannot malloc\n");
+ return -ENOMEM;
+ }
+ memcpy(fp, quirk->data, sizeof(*fp));
+ if (fp->nr_rates > 0) {
+ rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
+ if (!rate_table) {
+ kfree(fp);
+ return -ENOMEM;
+ }
+ memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
+ fp->rate_table = rate_table;
+ }
+
+ stream = (fp->endpoint & USB_DIR_IN)
+ ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+ err = add_audio_endpoint(chip, stream, fp);
+ if (err < 0) {
+ kfree(fp);
+ kfree(rate_table);
+ return err;
+ }
+ if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
+ fp->altset_idx >= iface->num_altsetting) {
+ kfree(fp);
+ kfree(rate_table);
+ return -EINVAL;
+ }
+ alts = &iface->altsetting[fp->altset_idx];
+ usb_set_interface(chip->dev, fp->iface, 0);
+ init_usb_pitch(chip->dev, fp->iface, alts, fp);
+ init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
+ return 0;
+}
+
+/*
+ * create a stream for an interface with proper descriptors
+ */
+static int create_standard_interface_quirk(snd_usb_audio_t *chip,
+ struct usb_interface *iface,
+ const snd_usb_audio_quirk_t *quirk)
+{
+ struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
+ int err;
+
+ alts = &iface->altsetting[0];
+ altsd = get_iface_desc(alts);
+ switch (quirk->type) {
+ case QUIRK_AUDIO_STANDARD_INTERFACE:
+ err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
+ if (!err)
+ usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0); /* reset the current interface */
+ break;
+ case QUIRK_MIDI_STANDARD_INTERFACE:
+ err = snd_usb_create_midi_interface(chip, iface, NULL);
+ break;
+ default:
+ snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
+ return -ENXIO;
+ }
+ if (err < 0) {
+ snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
+ altsd->bInterfaceNumber, err);
+ return err;
+ }
+ return 0;
+}
+
+/*
+ * Create a stream for an Edirol UA-700/UA-25 interface. The only way
+ * to detect the sample rate is by looking at wMaxPacketSize.
+ */
+static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
+ struct usb_interface *iface)
+{
+ static const struct audioformat ua_format = {
+ .format = SNDRV_PCM_FORMAT_S24_3LE,
+ .channels = 2,
+ .fmt_type = USB_FORMAT_TYPE_I,
+ .altsetting = 1,
+ .altset_idx = 1,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ };
+ struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
+ struct audioformat *fp;
+ int stream, err;
+
+ /* both PCM and MIDI interfaces have 2 altsettings */
+ if (iface->num_altsetting != 2)
+ return -ENXIO;
+ alts = &iface->altsetting[1];
+ altsd = get_iface_desc(alts);
+
+ if (altsd->bNumEndpoints == 2) {
+ static const snd_usb_midi_endpoint_info_t ua700_ep = {
+ .out_cables = 0x0003,
+ .in_cables = 0x0003
+ };
+ static const snd_usb_audio_quirk_t ua700_quirk = {
+ .type = QUIRK_MIDI_FIXED_ENDPOINT,
+ .data = &ua700_ep
+ };
+ static const snd_usb_midi_endpoint_info_t ua25_ep = {
+ .out_cables = 0x0001,
+ .in_cables = 0x0001
+ };
+ static const snd_usb_audio_quirk_t ua25_quirk = {
+ .type = QUIRK_MIDI_FIXED_ENDPOINT,
+ .data = &ua25_ep
+ };
+ if (le16_to_cpu(chip->dev->descriptor.idProduct) == 0x002b)
+ return snd_usb_create_midi_interface(chip, iface,
+ &ua700_quirk);
+ else
+ return snd_usb_create_midi_interface(chip, iface,
+ &ua25_quirk);
+ }
+
+ if (altsd->bNumEndpoints != 1)
+ return -ENXIO;
+
+ fp = kmalloc(sizeof(*fp), GFP_KERNEL);
+ if (!fp)
+ return -ENOMEM;
+ memcpy(fp, &ua_format, sizeof(*fp));
+
+ fp->iface = altsd->bInterfaceNumber;
+ fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
+ fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+ fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+
+ switch (fp->maxpacksize) {
+ case 0x120:
+ fp->rate_max = fp->rate_min = 44100;
+ break;
+ case 0x138:
+ case 0x140:
+ fp->rate_max = fp->rate_min = 48000;
+ break;
+ case 0x258:
+ case 0x260:
+ fp->rate_max = fp->rate_min = 96000;
+ break;
+ default:
+ snd_printk(KERN_ERR "unknown sample rate\n");
+ kfree(fp);
+ return -ENXIO;
+ }
+
+ stream = (fp->endpoint & USB_DIR_IN)
+ ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+ err = add_audio_endpoint(chip, stream, fp);
+ if (err < 0) {
+ kfree(fp);
+ return err;
+ }
+ usb_set_interface(chip->dev, fp->iface, 0);
+ return 0;
+}
+
+/*
+ * Create a stream for an Edirol UA-1000 interface.
+ */
+static int create_ua1000_quirk(snd_usb_audio_t *chip, struct usb_interface *iface)
+{
+ static const struct audioformat ua1000_format = {
+ .format = SNDRV_PCM_FORMAT_S32_LE,
+ .fmt_type = USB_FORMAT_TYPE_I,
+ .altsetting = 1,
+ .altset_idx = 1,
+ .attributes = 0,
+ .rates = SNDRV_PCM_RATE_CONTINUOUS,
+ };
+ struct usb_host_interface *alts;
+ struct usb_interface_descriptor *altsd;
+ struct audioformat *fp;
+ int stream, err;
+
+ if (iface->num_altsetting != 2)
+ return -ENXIO;
+ alts = &iface->altsetting[1];
+ altsd = get_iface_desc(alts);
+ if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
+ altsd->bNumEndpoints != 1)
+ return -ENXIO;
+
+ fp = kmalloc(sizeof(*fp), GFP_KERNEL);
+ if (!fp)
+ return -ENOMEM;
+ memcpy(fp, &ua1000_format, sizeof(*fp));
+
+ fp->channels = alts->extra[4];
+ fp->iface = altsd->bInterfaceNumber;
+ fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
+ fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+ fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+ fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
+
+ stream = (fp->endpoint & USB_DIR_IN)
+ ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+ err = add_audio_endpoint(chip, stream, fp);
+ if (err < 0) {
+ kfree(fp);
+ return err;
+ }
+ /* FIXME: playback must be synchronized to capture */
+ usb_set_interface(chip->dev, fp->iface, 0);
+ return 0;
+}
+
+static int snd_usb_create_quirk(snd_usb_audio_t *chip,
+ struct usb_interface *iface,
+ const snd_usb_audio_quirk_t *quirk);
+
+/*
+ * handle the quirks for the contained interfaces
+ */
+static int create_composite_quirk(snd_usb_audio_t *chip,
+ struct usb_interface *iface,
+ const snd_usb_audio_quirk_t *quirk)
+{
+ int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
+ int err;
+
+ for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
+ iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
+ if (!iface)
+ continue;
+ if (quirk->ifnum != probed_ifnum &&
+ usb_interface_claimed(iface))
+ continue;
+ err = snd_usb_create_quirk(chip, iface, quirk);
+ if (err < 0)
+ return err;
+ if (quirk->ifnum != probed_ifnum)
+ usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
+ }
+ return 0;
+}
+
+
+/*
+ * boot quirks
+ */
+
+#define EXTIGY_FIRMWARE_SIZE_OLD 794
+#define EXTIGY_FIRMWARE_SIZE_NEW 483
+
+static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
+{
+ struct usb_host_config *config = dev->actconfig;
+ int err;
+
+ if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
+ le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
+ snd_printdd("sending Extigy boot sequence...\n");
+ /* Send message to force it to reconnect with full interface. */
+ err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
+ 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
+ if (err < 0) snd_printdd("error sending boot message: %d\n", err);
+ err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
+ &dev->descriptor, sizeof(dev->descriptor));
+ config = dev->actconfig;
+ if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
+ err = usb_reset_configuration(dev);
+ if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
+ snd_printdd("extigy_boot: new boot length = %d\n",
+ le16_to_cpu(get_cfg_desc(config)->wTotalLength));
+ return -ENODEV; /* quit this anyway */
+ }
+ return 0;
+}
+
+
+/*
+ * audio-interface quirks
+ *
+ * returns zero if no standard audio/MIDI parsing is needed.
+ * returns a postive value if standard audio/midi interfaces are parsed
+ * after this.
+ * returns a negative value at error.
+ */
+static int snd_usb_create_quirk(snd_usb_audio_t *chip,
+ struct usb_interface *iface,
+ const snd_usb_audio_quirk_t *quirk)
+{
+ switch (quirk->type) {
+ case QUIRK_MIDI_FIXED_ENDPOINT:
+ case QUIRK_MIDI_YAMAHA:
+ case QUIRK_MIDI_MIDIMAN:
+ case QUIRK_MIDI_NOVATION:
+ case QUIRK_MIDI_MOTU:
+ case QUIRK_MIDI_EMAGIC:
+ return snd_usb_create_midi_interface(chip, iface, quirk);
+ case QUIRK_COMPOSITE:
+ return create_composite_quirk(chip, iface, quirk);
+ case QUIRK_AUDIO_FIXED_ENDPOINT:
+ return create_fixed_stream_quirk(chip, iface, quirk);
+ case QUIRK_AUDIO_STANDARD_INTERFACE:
+ case QUIRK_MIDI_STANDARD_INTERFACE:
+ return create_standard_interface_quirk(chip, iface, quirk);
+ case QUIRK_AUDIO_EDIROL_UA700_UA25:
+ return create_ua700_ua25_quirk(chip, iface);
+ case QUIRK_AUDIO_EDIROL_UA1000:
+ return create_ua1000_quirk(chip, iface);
+ case QUIRK_IGNORE_INTERFACE:
+ return 0;
+ default:
+ snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
+ return -ENXIO;
+ }
+}
+
+
+/*
+ * common proc files to show the usb device info
+ */
+static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
+{
+ snd_usb_audio_t *chip = entry->private_data;
+ if (! chip->shutdown)
+ snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
+}
+
+static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
+{
+ snd_usb_audio_t *chip = entry->private_data;
+ if (! chip->shutdown)
+ snd_iprintf(buffer, "%04x:%04x\n",
+ le16_to_cpu(chip->dev->descriptor.idVendor),
+ le16_to_cpu(chip->dev->descriptor.idProduct));
+}
+
+static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
+{
+ snd_info_entry_t *entry;
+ if (! snd_card_proc_new(chip->card, "usbbus", &entry))
+ snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
+ if (! snd_card_proc_new(chip->card, "usbid", &entry))
+ snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
+}
+
+/*
+ * free the chip instance
+ *
+ * here we have to do not much, since pcm and controls are already freed
+ *
+ */
+
+static int snd_usb_audio_free(snd_usb_audio_t *chip)
+{
+ kfree(chip);
+ return 0;
+}
+
+static int snd_usb_audio_dev_free(snd_device_t *device)
+{
+ snd_usb_audio_t *chip = device->device_data;
+ return snd_usb_audio_free(chip);
+}
+
+
+/*
+ * create a chip instance and set its names.
+ */
+static int snd_usb_audio_create(struct usb_device *dev, int idx,
+ const snd_usb_audio_quirk_t *quirk,
+ snd_usb_audio_t **rchip)
+{
+ snd_card_t *card;
+ snd_usb_audio_t *chip;
+ int err, len;
+ char component[14];
+ static snd_device_ops_t ops = {
+ .dev_free = snd_usb_audio_dev_free,
+ };
+
+ *rchip = NULL;
+
+ if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
+ snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
+ snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
+ return -ENXIO;
+ }
+
+ card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
+ if (card == NULL) {
+ snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
+ return -ENOMEM;
+ }
+
+ chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
+ if (! chip) {
+ snd_card_free(card);
+ return -ENOMEM;
+ }
+
+ chip->index = idx;
+ chip->dev = dev;
+ chip->card = card;
+ INIT_LIST_HEAD(&chip->pcm_list);
+ INIT_LIST_HEAD(&chip->midi_list);
+
+ if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
+ snd_usb_audio_free(chip);
+ snd_card_free(card);
+ return err;
+ }
+
+ strcpy(card->driver, "USB-Audio");
+ sprintf(component, "USB%04x:%04x",
+ le16_to_cpu(dev->descriptor.idVendor),
+ le16_to_cpu(dev->descriptor.idProduct));
+ snd_component_add(card, component);
+
+ /* retrieve the device string as shortname */
+ if (quirk && quirk->product_name) {
+ strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname));
+ } else {
+ if (!dev->descriptor.iProduct ||
+ usb_string(dev, dev->descriptor.iProduct,
+ card->shortname, sizeof(card->shortname)) <= 0) {
+ /* no name available from anywhere, so use ID */
+ sprintf(card->shortname, "USB Device %#04x:%#04x",
+ le16_to_cpu(dev->descriptor.idVendor),
+ le16_to_cpu(dev->descriptor.idProduct));
+ }
+ }
+
+ /* retrieve the vendor and device strings as longname */
+ if (quirk && quirk->vendor_name) {
+ len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname));
+ } else {
+ if (dev->descriptor.iManufacturer)
+ len = usb_string(dev, dev->descriptor.iManufacturer,
+ card->longname, sizeof(card->longname));
+ else
+ len = 0;
+ /* we don't really care if there isn't any vendor string */
+ }
+ if (len > 0)
+ strlcat(card->longname, " ", sizeof(card->longname));
+
+ strlcat(card->longname, card->shortname, sizeof(card->longname));
+
+ len = strlcat(card->longname, " at ", sizeof(card->longname));
+
+ if (len < sizeof(card->longname))
+ usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
+
+ strlcat(card->longname,
+ snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
+ sizeof(card->longname));
+
+ snd_usb_audio_create_proc(chip);
+
+ snd_card_set_dev(card, &dev->dev);
+
+ *rchip = chip;
+ return 0;
+}
+
+
+/*
+ * probe the active usb device
+ *
+ * note that this can be called multiple times per a device, when it
+ * includes multiple audio control interfaces.
+ *
+ * thus we check the usb device pointer and creates the card instance
+ * only at the first time. the successive calls of this function will
+ * append the pcm interface to the corresponding card.
+ */
+static void *snd_usb_audio_probe(struct usb_device *dev,
+ struct usb_interface *intf,
+ const struct usb_device_id *usb_id)
+{
+ struct usb_host_config *config = dev->actconfig;
+ const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
+ int i, err;
+ snd_usb_audio_t *chip;
+ struct usb_host_interface *alts;
+ int ifnum;
+
+ alts = &intf->altsetting[0];
+ ifnum = get_iface_desc(alts)->bInterfaceNumber;
+
+ if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
+ goto __err_val;
+
+ /* SB Extigy needs special boot-up sequence */
+ /* if more models come, this will go to the quirk list. */
+ if (le16_to_cpu(dev->descriptor.idVendor) == 0x041e &&
+ le16_to_cpu(dev->descriptor.idProduct) == 0x3000) {
+ if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
+ goto __err_val;
+ config = dev->actconfig;
+ }
+
+ /*
+ * found a config. now register to ALSA
+ */
+
+ /* check whether it's already registered */
+ chip = NULL;
+ down(®ister_mutex);
+ for (i = 0; i < SNDRV_CARDS; i++) {
+ if (usb_chip[i] && usb_chip[i]->dev == dev) {
+ if (usb_chip[i]->shutdown) {
+ snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n");
+ goto __error;
+ }
+ chip = usb_chip[i];
+ break;
+ }
+ }
+ if (! chip) {
+ /* it's a fresh one.
+ * now look for an empty slot and create a new card instance
+ */
+ /* first, set the current configuration for this device */
+ if (usb_reset_configuration(dev) < 0) {
+ snd_printk(KERN_ERR "cannot reset configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue);
+ goto __error;
+ }
+ for (i = 0; i < SNDRV_CARDS; i++)
+ if (enable[i] && ! usb_chip[i] &&
+ (vid[i] == -1 || vid[i] == le16_to_cpu(dev->descriptor.idVendor)) &&
+ (pid[i] == -1 || pid[i] == le16_to_cpu(dev->descriptor.idProduct))) {
+ if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
+ goto __error;
+ }
+ break;
+ }
+ if (! chip) {
+ snd_printk(KERN_ERR "no available usb audio device\n");
+ goto __error;
+ }
+ }
+
+ err = 1; /* continue */
+ if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) {
+ /* need some special handlings */
+ if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0)
+ goto __error;
+ }
+
+ if (err > 0) {
+ /* create normal USB audio interfaces */
+ if (snd_usb_create_streams(chip, ifnum) < 0 ||
+ snd_usb_create_mixer(chip, ifnum) < 0) {
+ goto __error;
+ }
+ }
+
+ /* we are allowed to call snd_card_register() many times */
+ if (snd_card_register(chip->card) < 0) {
+ goto __error;
+ }
+
+ usb_chip[chip->index] = chip;
+ chip->num_interfaces++;
+ up(®ister_mutex);
+ return chip;
+
+ __error:
+ if (chip && !chip->num_interfaces)
+ snd_card_free(chip->card);
+ up(®ister_mutex);
+ __err_val:
+ return NULL;
+}
+
+/*
+ * we need to take care of counter, since disconnection can be called also
+ * many times as well as usb_audio_probe().
+ */
+static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
+{
+ snd_usb_audio_t *chip;
+ snd_card_t *card;
+ struct list_head *p;
+
+ if (ptr == (void *)-1L)
+ return;
+
+ chip = ptr;
+ card = chip->card;
+ down(®ister_mutex);
+ chip->shutdown = 1;
+ chip->num_interfaces--;
+ if (chip->num_interfaces <= 0) {
+ snd_card_disconnect(card);
+ /* release the pcm resources */
+ list_for_each(p, &chip->pcm_list) {
+ snd_usb_stream_disconnect(p, &usb_audio_driver);
+ }
+ /* release the midi resources */
+ list_for_each(p, &chip->midi_list) {
+ snd_usbmidi_disconnect(p, &usb_audio_driver);
+ }
+ usb_chip[chip->index] = NULL;
+ up(®ister_mutex);
+ snd_card_free_in_thread(card);
+ } else {
+ up(®ister_mutex);
+ }
+}
+
+/*
+ * new 2.5 USB kernel API
+ */
+static int usb_audio_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ void *chip;
+ chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
+ if (chip) {
+ dev_set_drvdata(&intf->dev, chip);
+ return 0;
+ } else
+ return -EIO;
+}
+
+static void usb_audio_disconnect(struct usb_interface *intf)
+{
+ snd_usb_audio_disconnect(interface_to_usbdev(intf),
+ dev_get_drvdata(&intf->dev));
+}
+
+
+static int __init snd_usb_audio_init(void)
+{
+ if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
+ printk(KERN_WARNING "invalid nrpacks value.\n");
+ return -EINVAL;
+ }
+ usb_register(&usb_audio_driver);
+ return 0;
+}
+
+
+static void __exit snd_usb_audio_cleanup(void)
+{
+ usb_deregister(&usb_audio_driver);
+}
+
+module_init(snd_usb_audio_init);
+module_exit(snd_usb_audio_cleanup);