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-rw-r--r--sound/usb/usbaudio.c4051
1 files changed, 0 insertions, 4051 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
deleted file mode 100644
index 5b91aa02b40b..000000000000
--- a/sound/usb/usbaudio.c
+++ /dev/null
@@ -1,4051 +0,0 @@
-/*
- * (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 <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 <linux/mutex.h>
-#include <linux/usb/audio.h>
-#include <linux/usb/ch9.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"
-#include "usbmidi.h"
-#include "usbmixer.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 */
-/* Vendor/product IDs for this card */
-static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
-static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
-static int nrpacks = 8; /* max. number of packets per urb */
-static int async_unlink = 1;
-static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
-static int ignore_ctl_error;
-
-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, 0644);
-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.");
-module_param_array(device_setup, int, NULL, 0444);
-MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
-module_param(ignore_ctl_error, bool, 0444);
-MODULE_PARM_DESC(ignore_ctl_error,
- "Ignore errors from USB controller for mixer interfaces.");
-
-/*
- * debug the h/w constraints
- */
-/* #define HW_CONST_DEBUG */
-
-
-/*
- *
- */
-
-#define MAX_PACKS 20
-#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
-#define MAX_URBS 8
-#define SYNC_URBS 4 /* always four urbs for sync */
-#define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */
-
-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 char datainterval; /* log_2 of data packet interval */
- 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_usb_substream;
-
-struct snd_urb_ctx {
- struct urb *urb;
- unsigned int buffer_size; /* size of data buffer, if data URB */
- struct snd_usb_substream *subs;
- int index; /* index for urb array */
- int packets; /* number of packets per urb */
-};
-
-struct snd_urb_ops {
- int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
- int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
- int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
- int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
-};
-
-struct snd_usb_substream {
- struct snd_usb_stream *stream;
- struct usb_device *dev;
- struct snd_pcm_substream *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 datainterval; /* log_2 of data packet interval */
- 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 txfr_quirk:1; /* allow sub-frame alignment */
- unsigned int fmt_type; /* USB audio format type (1-3) */
-
- unsigned int running: 1; /* running status */
-
- unsigned int hwptr_done; /* processed byte position in the buffer */
- 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 */
- struct snd_urb_ctx dataurb[MAX_URBS]; /* data urb table */
- struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
- char *syncbuf; /* sync buffer for all sync URBs */
- dma_addr_t sync_dma; /* DMA address of syncbuf */
-
- u64 formats; /* format bitmasks (all or'ed) */
- unsigned int num_formats; /* number of supported audio formats (list) */
- struct list_head fmt_list; /* format list */
- struct snd_pcm_hw_constraint_list rate_list; /* limited rates */
- spinlock_t lock;
-
- struct snd_urb_ops ops; /* callbacks (must be filled at init) */
-};
-
-
-struct snd_usb_stream {
- struct snd_usb_audio *chip;
- struct snd_pcm *pcm;
- int pcm_index;
- unsigned int fmt_type; /* USB audio format type (1-3) */
- struct snd_usb_substream 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 DEFINE_MUTEX(register_mutex);
-static struct snd_usb_audio *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
- */
-static inline 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
- */
-static inline 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 */
-static inline 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 */
-static inline 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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- unsigned char *cp = urb->transfer_buffer;
- struct snd_urb_ctx *ctx = urb->context;
-
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- urb->iso_frame_desc[0].length = 3;
- urb->iso_frame_desc[0].offset = 0;
- 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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- unsigned char *cp = urb->transfer_buffer;
- struct snd_urb_ctx *ctx = urb->context;
-
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- urb->iso_frame_desc[0].length = 4;
- urb->iso_frame_desc[0].offset = 0;
- 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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- int i, offs;
- struct snd_urb_ctx *ctx = urb->context;
-
- offs = 0;
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- 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->transfer_buffer_length = offs;
- urb->number_of_packets = ctx->packets;
- 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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- unsigned long flags;
- unsigned char *cp;
- int i;
- unsigned int stride, frames, bytes, oldptr;
- int period_elapsed = 0;
-
- 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;
- }
- bytes = urb->iso_frame_desc[i].actual_length;
- frames = bytes / stride;
- if (!subs->txfr_quirk)
- bytes = frames * stride;
- if (bytes % (runtime->sample_bits >> 3) != 0) {
-#ifdef CONFIG_SND_DEBUG_VERBOSE
- int oldbytes = bytes;
-#endif
- bytes = frames * stride;
- snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
- oldbytes, bytes);
- }
- /* update the current pointer */
- spin_lock_irqsave(&subs->lock, flags);
- oldptr = subs->hwptr_done;
- subs->hwptr_done += bytes;
- if (subs->hwptr_done >= runtime->buffer_size * stride)
- subs->hwptr_done -= runtime->buffer_size * stride;
- frames = (bytes + (oldptr % stride)) / stride;
- subs->transfer_done += frames;
- if (subs->transfer_done >= runtime->period_size) {
- subs->transfer_done -= runtime->period_size;
- period_elapsed = 1;
- }
- spin_unlock_irqrestore(&subs->lock, flags);
- /* copy a data chunk */
- if (oldptr + bytes > runtime->buffer_size * stride) {
- unsigned int bytes1 =
- runtime->buffer_size * stride - oldptr;
- memcpy(runtime->dma_area + oldptr, cp, bytes1);
- memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
- } else {
- memcpy(runtime->dma_area + oldptr, cp, bytes);
- }
- }
- if (period_elapsed)
- snd_pcm_period_elapsed(subs->pcm_substream);
- return 0;
-}
-
-/*
- * Process after capture complete when paused. Nothing to do.
- */
-static int retire_paused_capture_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- 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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- struct snd_urb_ctx *ctx = urb->context;
-
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- urb->iso_frame_desc[0].length = 3;
- urb->iso_frame_desc[0].offset = 0;
- 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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- struct snd_urb_ctx *ctx = urb->context;
-
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- urb->iso_frame_desc[0].length = 4;
- urb->iso_frame_desc[0].offset = 0;
- 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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- unsigned int f;
- unsigned long flags;
-
- if (urb->iso_frame_desc[0].status == 0 &&
- urb->iso_frame_desc[0].actual_length == 3) {
- f = combine_triple((u8*)urb->transfer_buffer) << 2;
- if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
- spin_lock_irqsave(&subs->lock, flags);
- subs->freqm = f;
- 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(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- unsigned int f;
- unsigned long flags;
-
- if (urb->iso_frame_desc[0].status == 0 &&
- urb->iso_frame_desc[0].actual_length == 4) {
- f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
- if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
- spin_lock_irqsave(&subs->lock, flags);
- subs->freqm = f;
- spin_unlock_irqrestore(&subs->lock, flags);
- }
- }
-
- return 0;
-}
-
-/*
- * process after E-Mu 0202/0404/Tracker Pre high speed playback sync complete
- *
- * These devices return the number of samples per packet instead of the number
- * of samples per microframe.
- */
-static int retire_playback_sync_urb_hs_emu(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- unsigned int f;
- unsigned long flags;
-
- if (urb->iso_frame_desc[0].status == 0 &&
- urb->iso_frame_desc[0].actual_length == 4) {
- f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
- f >>= subs->datainterval;
- if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
- spin_lock_irqsave(&subs->lock, flags);
- subs->freqm = f;
- spin_unlock_irqrestore(&subs->lock, flags);
- }
- }
-
- return 0;
-}
-
-/* determine the number of frames in the next packet */
-static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
-{
- if (subs->fill_max)
- return subs->maxframesize;
- else {
- subs->phase = (subs->phase & 0xffff)
- + (subs->freqm << subs->datainterval);
- return min(subs->phase >> 16, subs->maxframesize);
- }
-}
-
-/*
- * Prepare urb for streaming before playback starts or when paused.
- *
- * We don't have any data, so we send silence.
- */
-static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- unsigned int i, offs, counts;
- struct snd_urb_ctx *ctx = urb->context;
- int stride = runtime->frame_bits >> 3;
-
- offs = 0;
- urb->dev = ctx->subs->dev;
- for (i = 0; i < ctx->packets; ++i) {
- counts = snd_usb_audio_next_packet_size(subs);
- urb->iso_frame_desc[i].offset = offs * stride;
- urb->iso_frame_desc[i].length = counts * stride;
- offs += counts;
- }
- urb->number_of_packets = ctx->packets;
- urb->transfer_buffer_length = offs * stride;
- memset(urb->transfer_buffer,
- subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
- offs * stride);
- return 0;
-}
-
-/*
- * prepare urb for playback data pipe
- *
- * Since a URB can handle only a single linear buffer, we must use double
- * buffering when the data to be transferred overflows the buffer boundary.
- * To avoid inconsistencies when updating hwptr_done, we use double buffering
- * for all URBs.
- */
-static int prepare_playback_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- int i, stride;
- unsigned int counts, frames, bytes;
- unsigned long flags;
- int period_elapsed = 0;
- struct snd_urb_ctx *ctx = urb->context;
-
- stride = runtime->frame_bits >> 3;
-
- frames = 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++) {
- counts = snd_usb_audio_next_packet_size(subs);
- /* set up descriptor */
- urb->iso_frame_desc[i].offset = frames * stride;
- urb->iso_frame_desc[i].length = counts * stride;
- frames += counts;
- urb->number_of_packets++;
- subs->transfer_done += counts;
- if (subs->transfer_done >= runtime->period_size) {
- subs->transfer_done -= runtime->period_size;
- period_elapsed = 1;
- if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
- if (subs->transfer_done > 0) {
- /* FIXME: fill-max mode is not
- * supported yet */
- frames -= subs->transfer_done;
- counts -= subs->transfer_done;
- urb->iso_frame_desc[i].length =
- counts * stride;
- subs->transfer_done = 0;
- }
- i++;
- if (i < ctx->packets) {
- /* add a transfer delimiter */
- urb->iso_frame_desc[i].offset =
- frames * stride;
- urb->iso_frame_desc[i].length = 0;
- urb->number_of_packets++;
- }
- break;
- }
- }
- if (period_elapsed) /* finish at the period boundary */
- break;
- }
- bytes = frames * stride;
- if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
- /* err, the transferred area goes over buffer boundary. */
- unsigned int bytes1 =
- runtime->buffer_size * stride - subs->hwptr_done;
- memcpy(urb->transfer_buffer,
- runtime->dma_area + subs->hwptr_done, bytes1);
- memcpy(urb->transfer_buffer + bytes1,
- runtime->dma_area, bytes - bytes1);
- } else {
- memcpy(urb->transfer_buffer,
- runtime->dma_area + subs->hwptr_done, bytes);
- }
- subs->hwptr_done += bytes;
- if (subs->hwptr_done >= runtime->buffer_size * stride)
- subs->hwptr_done -= runtime->buffer_size * stride;
- runtime->delay += frames;
- spin_unlock_irqrestore(&subs->lock, flags);
- urb->transfer_buffer_length = bytes;
- if (period_elapsed)
- snd_pcm_period_elapsed(subs->pcm_substream);
- return 0;
-}
-
-/*
- * process after playback data complete
- * - decrease the delay count again
- */
-static int retire_playback_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- unsigned long flags;
- int stride = runtime->frame_bits >> 3;
- int processed = urb->transfer_buffer_length / stride;
-
- spin_lock_irqsave(&subs->lock, flags);
- if (processed > runtime->delay)
- runtime->delay = 0;
- else
- runtime->delay -= processed;
- spin_unlock_irqrestore(&subs->lock, flags);
- return 0;
-}
-
-
-/*
- */
-static struct snd_urb_ops audio_urb_ops[2] = {
- {
- .prepare = prepare_nodata_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_nodata_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 snd_urb_ctx *ctx = urb->context;
- struct snd_usb_substream *subs = ctx->subs;
- struct snd_pcm_substream *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 snd_urb_ctx *ctx = urb->context;
- struct snd_usb_substream *subs = ctx->subs;
- struct snd_pcm_substream *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(struct snd_usb_substream *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)
- 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)
- usb_unlink_urb(u);
- else
- usb_kill_urb(u);
- }
- }
- }
- }
- return 0;
-}
-
-
-static const char *usb_error_string(int err)
-{
- switch (err) {
- case -ENODEV:
- return "no device";
- case -ENOENT:
- return "endpoint not enabled";
- case -EPIPE:
- return "endpoint stalled";
- case -ENOSPC:
- return "not enough bandwidth";
- case -ESHUTDOWN:
- return "device disabled";
- case -EHOSTUNREACH:
- return "device suspended";
- case -EINVAL:
- case -EAGAIN:
- case -EFBIG:
- case -EMSGSIZE:
- return "internal error";
- default:
- return "unknown error";
- }
-}
-
-/*
- * set up and start data/sync urbs
- */
-static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
-{
- unsigned int i;
- int err;
-
- if (subs->stream->chip->shutdown)
- return -EBADFD;
-
- for (i = 0; i < subs->nurbs; i++) {
- if (snd_BUG_ON(!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++) {
- if (snd_BUG_ON(!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++) {
- err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
- if (err < 0) {
- snd_printk(KERN_ERR "cannot submit datapipe "
- "for urb %d, error %d: %s\n",
- i, err, usb_error_string(err));
- goto __error;
- }
- set_bit(i, &subs->active_mask);
- }
- if (subs->syncpipe) {
- for (i = 0; i < SYNC_URBS; i++) {
- err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
- if (err < 0) {
- snd_printk(KERN_ERR "cannot submit syncpipe "
- "for urb %d, error %d: %s\n",
- i, err, usb_error_string(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(struct snd_usb_substream *subs)
-{
- unsigned long end_time = jiffies + msecs_to_jiffies(1000);
- 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;
- schedule_timeout_uninterruptible(1);
- } while (time_before(jiffies, end_time));
- if (alive)
- snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
- return 0;
-}
-
-
-/*
- * return the current pcm pointer. just based on the hwptr_done value.
- */
-static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
-{
- struct snd_usb_substream *subs;
- unsigned int hwptr_done;
-
- subs = (struct snd_usb_substream *)substream->runtime->private_data;
- spin_lock(&subs->lock);
- hwptr_done = subs->hwptr_done;
- spin_unlock(&subs->lock);
- return hwptr_done / (substream->runtime->frame_bits >> 3);
-}
-
-
-/*
- * start/stop playback substream
- */
-static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
- int cmd)
-{
- struct snd_usb_substream *subs = substream->runtime->private_data;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- subs->ops.prepare = prepare_playback_urb;
- return 0;
- case SNDRV_PCM_TRIGGER_STOP:
- return deactivate_urbs(subs, 0, 0);
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- subs->ops.prepare = prepare_nodata_playback_urb;
- return 0;
- default:
- return -EINVAL;
- }
-}
-
-/*
- * start/stop capture substream
- */
-static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
- int cmd)
-{
- struct snd_usb_substream *subs = substream->runtime->private_data;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- subs->ops.retire = retire_capture_urb;
- return start_urbs(subs, substream->runtime);
- case SNDRV_PCM_TRIGGER_STOP:
- return deactivate_urbs(subs, 0, 0);
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- subs->ops.retire = retire_paused_capture_urb;
- return 0;
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- subs->ops.retire = retire_capture_urb;
- return 0;
- default:
- return -EINVAL;
- }
-}
-
-
-/*
- * release a urb data
- */
-static void release_urb_ctx(struct snd_urb_ctx *u)
-{
- if (u->urb) {
- if (u->buffer_size)
- usb_buffer_free(u->subs->dev, u->buffer_size,
- u->urb->transfer_buffer,
- u->urb->transfer_dma);
- usb_free_urb(u->urb);
- u->urb = NULL;
- }
-}
-
-/*
- * release a substream
- */
-static void release_substream_urbs(struct snd_usb_substream *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]);
- usb_buffer_free(subs->dev, SYNC_URBS * 4,
- subs->syncbuf, subs->sync_dma);
- subs->syncbuf = NULL;
- subs->nurbs = 0;
-}
-
-/*
- * initialize a substream for plaback/capture
- */
-static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
- unsigned int rate, unsigned int frame_bits)
-{
- unsigned int maxsize, i;
- int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
- unsigned int urb_packs, total_packs, packs_per_ms;
-
- /* 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;
- /* calculate max. frequency */
- if (subs->maxpacksize) {
- /* whatever fits into a max. size packet */
- maxsize = subs->maxpacksize;
- subs->freqmax = (maxsize / (frame_bits >> 3))
- << (16 - subs->datainterval);
- } else {
- /* no max. packet size: just take 25% higher than nominal */
- subs->freqmax = subs->freqn + (subs->freqn >> 2);
- maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
- >> (16 - subs->datainterval);
- }
- subs->phase = 0;
-
- if (subs->fill_max)
- subs->curpacksize = subs->maxpacksize;
- else
- subs->curpacksize = maxsize;
-
- if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
- packs_per_ms = 8 >> subs->datainterval;
- else
- packs_per_ms = 1;
-
- if (is_playback) {
- urb_packs = max(nrpacks, 1);
- urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
- } else
- urb_packs = 1;
- urb_packs *= packs_per_ms;
- if (subs->syncpipe)
- urb_packs = min(urb_packs, 1U << subs->syncinterval);
-
- /* decide how many packets to be used */
- if (is_playback) {
- unsigned int minsize, maxpacks;
- /* determine how small a packet can be */
- minsize = (subs->freqn >> (16 - subs->datainterval))
- * (frame_bits >> 3);
- /* with sync from device, assume it can be 12% lower */
- if (subs->syncpipe)
- minsize -= minsize >> 3;
- minsize = max(minsize, 1u);
- total_packs = (period_bytes + minsize - 1) / minsize;
- /* we need at least two URBs for queueing */
- if (total_packs < 2) {
- total_packs = 2;
- } else {
- /* and we don't want too long a queue either */
- maxpacks = max(MAX_QUEUE * packs_per_ms, urb_packs * 2);
- total_packs = min(total_packs, maxpacks);
- }
- } else {
- while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
- urb_packs >>= 1;
- total_packs = MAX_URBS * urb_packs;
- }
- 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;
- } else if (subs->nurbs < 2) {
- /* too little - we need at least two packets
- * to ensure contiguous playback/capture
- */
- subs->nurbs = 2;
- }
-
- /* allocate and initialize data urbs */
- for (i = 0; i < subs->nurbs; i++) {
- struct snd_urb_ctx *u = &subs->dataurb[i];
- u->index = i;
- u->subs = subs;
- u->packets = (i + 1) * total_packs / subs->nurbs
- - i * total_packs / subs->nurbs;
- u->buffer_size = maxsize * u->packets;
- if (subs->fmt_type == UAC_FORMAT_TYPE_II)
- u->packets++; /* for transfer delimiter */
- u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
- if (!u->urb)
- goto out_of_memory;
- u->urb->transfer_buffer =
- usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
- &u->urb->transfer_dma);
- if (!u->urb->transfer_buffer)
- goto out_of_memory;
- u->urb->pipe = subs->datapipe;
- u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
- u->urb->interval = 1 << subs->datainterval;
- u->urb->context = u;
- u->urb->complete = snd_complete_urb;
- }
-
- if (subs->syncpipe) {
- /* allocate and initialize sync urbs */
- subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
- GFP_KERNEL, &subs->sync_dma);
- if (!subs->syncbuf)
- goto out_of_memory;
- for (i = 0; i < SYNC_URBS; i++) {
- struct snd_urb_ctx *u = &subs->syncurb[i];
- u->index = i;
- u->subs = subs;
- u->packets = 1;
- u->urb = usb_alloc_urb(1, GFP_KERNEL);
- if (!u->urb)
- goto out_of_memory;
- u->urb->transfer_buffer = subs->syncbuf + i * 4;
- u->urb->transfer_dma = subs->sync_dma + i * 4;
- u->urb->transfer_buffer_length = 4;
- u->urb->pipe = subs->syncpipe;
- u->urb->transfer_flags = URB_ISO_ASAP |
- URB_NO_TRANSFER_DMA_MAP;
- u->urb->number_of_packets = 1;
- u->urb->interval = 1 << subs->syncinterval;
- u->urb->context = u;
- u->urb->complete = snd_complete_sync_urb;
- }
- }
- return 0;
-
-out_of_memory:
- release_substream_urbs(subs, 0);
- return -ENOMEM;
-}
-
-
-/*
- * find a matching audio format
- */
-static struct audioformat *find_format(struct snd_usb_substream *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 & USB_ENDPOINT_SYNCTYPE;
- 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 == USB_ENDPOINT_SYNC_ASYNC &&
- subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
- (attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
- subs->direction == SNDRV_PCM_STREAM_CAPTURE))
- continue;
- if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
- subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
- (cur_attr == USB_ENDPOINT_SYNC_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 & UAC_EP_CS_ATTR_PITCH_CONTROL) {
- data[0] = 1;
- if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
- USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
- UAC_EP_CS_ATTR_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 & UAC_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), UAC_SET_CUR,
- USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
- UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000)) < 0) {
- snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep %#x\n",
- dev->devnum, iface, fmt->altsetting, rate, ep);
- return err;
- }
- if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC_GET_CUR,
- USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
- UAC_EP_CS_ATTR_SAMPLE_RATE << 8, ep, data, 3, 1000)) < 0) {
- snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep %#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;
-}
-
-/*
- * For E-Mu 0404USB/0202USB/TrackerPre sample rate should be set for device,
- * not for interface.
- */
-static void set_format_emu_quirk(struct snd_usb_substream *subs,
- struct audioformat *fmt)
-{
- unsigned char emu_samplerate_id = 0;
-
- /* When capture is active
- * sample rate shouldn't be changed
- * by playback substream
- */
- if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
- if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
- return;
- }
-
- switch (fmt->rate_min) {
- case 48000:
- emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
- break;
- case 88200:
- emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
- break;
- case 96000:
- emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
- break;
- case 176400:
- emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
- break;
- case 192000:
- emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
- break;
- default:
- emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
- break;
- }
- snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
-}
-
-/*
- * find a matching format and set up the interface
- */
-static int set_format(struct snd_usb_substream *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);
- if (WARN_ON(!iface))
- return -EINVAL;
- alts = &iface->altsetting[fmt->altset_idx];
- altsd = get_iface_desc(alts);
- if (WARN_ON(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) {
- if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
- snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
- dev->devnum, fmt->iface, fmt->altsetting);
- return -EIO;
- }
- 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->datainterval = fmt->datainterval;
- 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 & USB_ENDPOINT_SYNCTYPE;
- if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
- (! is_playback && attr == USB_ENDPOINT_SYNC_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);
- if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
- get_endpoint(alts, 1)->bRefresh >= 1 &&
- get_endpoint(alts, 1)->bRefresh <= 9)
- subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
- else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
- subs->syncinterval = 1;
- else if (get_endpoint(alts, 1)->bInterval >= 1 &&
- get_endpoint(alts, 1)->bInterval <= 16)
- subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
- else
- subs->syncinterval = 3;
- }
-
- /* always fill max packet size */
- if (fmt->attributes & UAC_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;
-
- switch (subs->stream->chip->usb_id) {
- case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
- case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
- case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
- set_format_emu_quirk(subs, fmt);
- break;
- }
-
-#if 0
- printk(KERN_DEBUG
- "setting done: format = %d, rate = %d..%d, channels = %d\n",
- fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
- printk(KERN_DEBUG
- " 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(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- struct snd_usb_substream *subs = substream->runtime->private_data;
- struct audioformat *fmt;
- unsigned int channels, rate, format;
- int ret, changed;
-
- ret = snd_pcm_lib_alloc_vmalloc_buffer(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 = %#x, rate = %d, channels = %d\n",
- 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(struct snd_pcm_substream *substream)
-{
- struct snd_usb_substream *subs = substream->runtime->private_data;
-
- subs->cur_audiofmt = NULL;
- subs->cur_rate = 0;
- subs->period_bytes = 0;
- if (!subs->stream->chip->shutdown)
- release_substream_urbs(subs, 0);
- return snd_pcm_lib_free_vmalloc_buffer(substream);
-}
-
-/*
- * prepare callback
- *
- * only a few subtle things...
- */
-static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_usb_substream *subs = 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_done = 0;
- subs->transfer_done = 0;
- subs->phase = 0;
- runtime->delay = 0;
-
- /* clear urbs (to be sure) */
- deactivate_urbs(subs, 0, 1);
- wait_clear_urbs(subs);
-
- /* for playback, submit the URBs now; otherwise, the first hwptr_done
- * updates for all URBs would happen at the same time when starting */
- if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
- subs->ops.prepare = prepare_nodata_playback_urb;
- return start_urbs(subs, runtime);
- } else
- return 0;
-}
-
-static struct snd_pcm_hardware snd_usb_hardware =
-{
- .info = SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_BATCH |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_BLOCK_TRANSFER |
- SNDRV_PCM_INFO_PAUSE,
- .buffer_bytes_max = 1024 * 1024,
- .period_bytes_min = 64,
- .period_bytes_max = 512 * 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(struct snd_usb_substream *subs,
- struct snd_pcm_hw_params *params,
- struct audioformat *fp)
-{
- struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
- struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
- struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
- struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
- unsigned int ptime;
-
- /* 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;
- }
- /* check whether the period time is >= the data packet interval */
- if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) {
- ptime = 125 * (1 << fp->datainterval);
- if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
- hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
- return 0;
- }
- }
- return 1;
-}
-
-static int hw_rule_rate(struct snd_pcm_hw_params *params,
- struct snd_pcm_hw_rule *rule)
-{
- struct snd_usb_substream *subs = rule->private;
- struct list_head *p;
- struct snd_interval *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(subs, 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(struct snd_pcm_hw_params *params,
- struct snd_pcm_hw_rule *rule)
-{
- struct snd_usb_substream *subs = rule->private;
- struct list_head *p;
- struct snd_interval *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(subs, 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(struct snd_pcm_hw_params *params,
- struct snd_pcm_hw_rule *rule)
-{
- struct snd_usb_substream *subs = rule->private;
- struct list_head *p;
- struct snd_mask *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(subs, 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;
-}
-
-static int hw_rule_period_time(struct snd_pcm_hw_params *params,
- struct snd_pcm_hw_rule *rule)
-{
- struct snd_usb_substream *subs = rule->private;
- struct audioformat *fp;
- struct snd_interval *it;
- unsigned char min_datainterval;
- unsigned int pmin;
- int changed;
-
- it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
- hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
- min_datainterval = 0xff;
- list_for_each_entry(fp, &subs->fmt_list, list) {
- if (!hw_check_valid_format(subs, params, fp))
- continue;
- min_datainterval = min(min_datainterval, fp->datainterval);
- }
- if (min_datainterval == 0xff) {
- hwc_debug(" --> get emtpy\n");
- it->empty = 1;
- return -EINVAL;
- }
- pmin = 125 * (1 << min_datainterval);
- changed = 0;
- if (it->min < pmin) {
- it->min = pmin;
- it->openmin = 0;
- changed = 1;
- }
- if (snd_interval_checkempty(it)) {
- it->empty = 1;
- return -EINVAL;
- }
- hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
- return changed;
-}
-
-/*
- * If the device supports unusual bit rates, does the request meet these?
- */
-static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
- struct snd_usb_substream *subs)
-{
- struct audioformat *fp;
- int count = 0, needs_knot = 0;
- int err;
-
- list_for_each_entry(fp, &subs->fmt_list, list) {
- if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
- return 0;
- count += fp->nr_rates;
- if (fp->rates & SNDRV_PCM_RATE_KNOT)
- needs_knot = 1;
- }
- if (!needs_knot)
- return 0;
-
- subs->rate_list.count = count;
- subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
- subs->rate_list.mask = 0;
- count = 0;
- list_for_each_entry(fp, &subs->fmt_list, list) {
- int i;
- for (i = 0; i < fp->nr_rates; i++)
- subs->rate_list.list[count++] = fp->rate_table[i];
- }
- err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
- &subs->rate_list);
- if (err < 0)
- return err;
-
- return 0;
-}
-
-
-/*
- * set up the runtime hardware information.
- */
-
-static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
-{
- struct list_head *p;
- unsigned int pt, ptmin;
- int param_period_time_if_needed;
- 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;
- ptmin = UINT_MAX;
- /* 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 == UAC_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;
- }
- pt = 125 * (1 << fp->datainterval);
- ptmin = min(ptmin, pt);
- }
-
- param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
- if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH)
- /* full speed devices have fixed data packet interval */
- ptmin = 1000;
- if (ptmin == 1000)
- /* if period time doesn't go below 1 ms, no rules needed */
- param_period_time_if_needed = -1;
- snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
- ptmin, UINT_MAX);
-
- 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,
- param_period_time_if_needed,
- -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,
- param_period_time_if_needed,
- -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,
- param_period_time_if_needed,
- -1)) < 0)
- return err;
- if (param_period_time_if_needed >= 0) {
- err = snd_pcm_hw_rule_add(runtime, 0,
- SNDRV_PCM_HW_PARAM_PERIOD_TIME,
- hw_rule_period_time, subs,
- SNDRV_PCM_HW_PARAM_FORMAT,
- SNDRV_PCM_HW_PARAM_CHANNELS,
- SNDRV_PCM_HW_PARAM_RATE,
- -1);
- if (err < 0)
- return err;
- }
- if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
- return err;
- return 0;
-}
-
-static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
-{
- struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_usb_substream *subs = &as->substream[direction];
-
- subs->interface = -1;
- subs->format = 0;
- runtime->hw = snd_usb_hardware;
- runtime->private_data = subs;
- subs->pcm_substream = substream;
- return setup_hw_info(runtime, subs);
-}
-
-static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
-{
- struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
- struct snd_usb_substream *subs = &as->substream[direction];
-
- if (!as->chip->shutdown && 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(struct snd_pcm_substream *substream)
-{
- return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
-}
-
-static int snd_usb_playback_close(struct snd_pcm_substream *substream)
-{
- return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
-}
-
-static int snd_usb_capture_open(struct snd_pcm_substream *substream)
-{
- return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
-}
-
-static int snd_usb_capture_close(struct snd_pcm_substream *substream)
-{
- return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
-}
-
-static struct snd_pcm_ops 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_playback_trigger,
- .pointer = snd_usb_pcm_pointer,
- .page = snd_pcm_lib_get_vmalloc_page,
- .mmap = snd_pcm_lib_mmap_vmalloc,
-};
-
-static struct snd_pcm_ops 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_capture_trigger,
- .pointer = snd_usb_pcm_pointer,
- .page = snd_pcm_lib_get_vmalloc_page,
- .mmap = snd_pcm_lib_mmap_vmalloc,
-};
-
-
-
-/*
- * 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 = kmemdup(data, size, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- }
- 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);
-
-#ifdef CONFIG_PM
-static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message);
-static int usb_audio_resume(struct usb_interface *intf);
-#else
-#define usb_audio_suspend NULL
-#define usb_audio_resume NULL
-#endif
-
-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_AUDIOCONTROL },
- { } /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE (usb, usb_audio_ids);
-
-static struct usb_driver usb_audio_driver = {
- .name = "snd-usb-audio",
- .probe = usb_audio_probe,
- .disconnect = usb_audio_disconnect,
- .suspend = usb_audio_suspend,
- .resume = usb_audio_resume,
- .id_table = usb_audio_ids,
-};
-
-
-#if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
-
-/*
- * proc interface for list the supported pcm formats
- */
-static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *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 & USB_ENDPOINT_SYNCTYPE) >> 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");
- }
- if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
- snd_iprintf(buffer, " Data packet interval: %d us\n",
- 125 * (1 << fp->datainterval));
- // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
- // snd_iprintf(buffer, " EP Attribute = %#x\n", fp->attributes);
- }
-}
-
-static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *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 (%#x.%04x)\n",
- snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
- ? get_full_speed_hz(subs->freqm)
- : get_high_speed_hz(subs->freqm),
- subs->freqm >> 16, subs->freqm & 0xffff);
- } else {
- snd_iprintf(buffer, " Status: Stop\n");
- }
-}
-
-static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
-{
- struct snd_usb_stream *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(struct snd_usb_stream *stream)
-{
- struct snd_info_entry *entry;
- char name[32];
- struct snd_card *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, proc_pcm_format_read);
-}
-
-#else
-
-static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
-{
-}
-
-#endif
-
-/*
- * initialize the substream instance.
- */
-
-static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
-{
- struct snd_usb_substream *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;
- subs->txfr_quirk = as->chip->txfr_quirk;
- 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];
- switch (as->chip->usb_id) {
- case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
- case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
- case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
- subs->ops.retire_sync = retire_playback_sync_urb_hs_emu;
- break;
- }
- }
- 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(struct snd_usb_substream *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);
- }
- kfree(subs->rate_list.list);
-}
-
-
-/*
- * free a usb stream instance
- */
-static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
-{
- free_substream(&stream->substream[0]);
- free_substream(&stream->substream[1]);
- list_del(&stream->list);
- kfree(stream);
-}
-
-static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
-{
- struct snd_usb_stream *stream = pcm->private_data;
- if (stream) {
- stream->pcm = NULL;
- 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(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
-{
- struct list_head *p;
- struct snd_usb_stream *as;
- struct snd_usb_substream *subs;
- struct snd_pcm *pcm;
- int err;
-
- list_for_each(p, &chip->pcm_list) {
- as = list_entry(p, struct snd_usb_stream, 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, struct snd_usb_stream, 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 = kzalloc(sizeof(*as), GFP_KERNEL);
- if (!as)
- return -ENOMEM;
- 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 snd_usb_audio *chip, struct audioformat *fp)
-{
- switch (chip->usb_id) {
- case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
- if (fp->endpoint & USB_DIR_IN)
- return 1;
- break;
- case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
- if (device_setup[chip->index] == 0x00 ||
- fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
- 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 snd_usb_audio *chip,
- struct audioformat *fp,
- int format, void *_fmt,
- int protocol)
-{
- int pcm_format, i;
- int sample_width, sample_bytes;
-
- switch (protocol) {
- case UAC_VERSION_1: {
- struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
- sample_width = fmt->bBitResolution;
- sample_bytes = fmt->bSubframeSize;
- break;
- }
-
- case UAC_VERSION_2: {
- struct uac_format_type_i_ext_descriptor *fmt = _fmt;
- sample_width = fmt->bBitResolution;
- sample_bytes = fmt->bSubslotSize;
-
- /*
- * FIXME
- * USB audio class v2 devices specify a bitmap of possible
- * audio formats rather than one fix value. For now, we just
- * pick one of them and report that as the only possible
- * value for this setting.
- * The bit allocation map is in fact compatible to the
- * wFormatTag of the v1 AS streaming descriptors, which is why
- * we can simply map the matrix.
- */
-
- for (i = 0; i < 5; i++)
- if (format & (1UL << i)) {
- format = i + 1;
- break;
- }
-
- break;
- }
-
- default:
- return -EINVAL;
- }
-
- /* FIXME: correct endianess and sign? */
- pcm_format = -1;
-
- switch (format) {
- case UAC_FORMAT_TYPE_I_UNDEFINED: /* some devices don't define this correctly... */
- snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
- chip->dev->devnum, fp->iface, fp->altsetting);
- /* fall-through */
- case UAC_FORMAT_TYPE_I_PCM:
- if (sample_width > sample_bytes * 8) {
- snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
- chip->dev->devnum, fp->iface, fp->altsetting,
- sample_width, sample_bytes);
- }
- /* check the format byte size */
- switch (sample_bytes) {
- case 1:
- pcm_format = SNDRV_PCM_FORMAT_S8;
- break;
- case 2:
- if (is_big_endian_format(chip, 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(chip, 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",
- chip->dev->devnum, fp->iface, fp->altsetting,
- sample_width, sample_bytes);
- break;
- }
- break;
- case UAC_FORMAT_TYPE_I_PCM8:
- pcm_format = SNDRV_PCM_FORMAT_U8;
-
- /* Dallas DS4201 workaround: it advertises U8 format, but really
- supports S8. */
- if (chip->usb_id == USB_ID(0x04fa, 0x4201))
- pcm_format = SNDRV_PCM_FORMAT_S8;
- break;
- case UAC_FORMAT_TYPE_I_IEEE_FLOAT:
- pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
- break;
- case UAC_FORMAT_TYPE_I_ALAW:
- pcm_format = SNDRV_PCM_FORMAT_A_LAW;
- break;
- case UAC_FORMAT_TYPE_I_MULAW:
- pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
- break;
- default:
- snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
- chip->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 (audio class v1).
- *
- * @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_v1(struct snd_usb_audio *chip, 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 UAC_FORMAT_TYPE desc\n",
- chip->dev->devnum, fp->iface, fp->altsetting);
- return -1;
- }
-
- if (nr_rates) {
- /*
- * build the rate table and bitmap flags
- */
- int r, idx;
-
- 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 = 0;
- fp->rate_min = fp->rate_max = 0;
- for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
- unsigned int rate = combine_triple(&fmt[idx]);
- if (!rate)
- continue;
- /* C-Media CM6501 mislabels its 96 kHz altsetting */
- if (rate == 48000 && nr_rates == 1 &&
- (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
- chip->usb_id == USB_ID(0x0d8c, 0x0102)) &&
- fp->altsetting == 5 && fp->maxpacksize == 392)
- rate = 96000;
- /* Creative VF0470 Live Cam reports 16 kHz instead of 8kHz */
- if (rate == 16000 && chip->usb_id == USB_ID(0x041e, 0x4068))
- rate = 8000;
- fp->rate_table[fp->nr_rates] = rate;
- if (!fp->rate_min || rate < fp->rate_min)
- fp->rate_min = rate;
- if (!fp->rate_max || rate > fp->rate_max)
- fp->rate_max = rate;
- fp->rates |= snd_pcm_rate_to_rate_bit(rate);
- fp->nr_rates++;
- }
- if (!fp->nr_rates) {
- hwc_debug("All rates were zero. Skipping format!\n");
- return -1;
- }
- } 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 descriptor and stores the possible sample rates
- * on the audioformat table (audio class v2).
- */
-static int parse_audio_format_rates_v2(struct snd_usb_audio *chip,
- struct audioformat *fp,
- struct usb_host_interface *iface)
-{
- struct usb_device *dev = chip->dev;
- unsigned char tmp[2], *data;
- int i, nr_rates, data_size, ret = 0;
-
- /* get the number of sample rates first by only fetching 2 bytes */
- ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
- USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
- 0x0100, chip->clock_id << 8, tmp, sizeof(tmp), 1000);
-
- if (ret < 0) {
- snd_printk(KERN_ERR "unable to retrieve number of sample rates\n");
- goto err;
- }
-
- nr_rates = (tmp[1] << 8) | tmp[0];
- data_size = 2 + 12 * nr_rates;
- data = kzalloc(data_size, GFP_KERNEL);
- if (!data) {
- ret = -ENOMEM;
- goto err;
- }
-
- /* now get the full information */
- ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
- USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
- 0x0100, chip->clock_id << 8, data, data_size, 1000);
-
- if (ret < 0) {
- snd_printk(KERN_ERR "unable to retrieve sample rate range\n");
- ret = -EINVAL;
- goto err_free;
- }
-
- fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
- if (!fp->rate_table) {
- ret = -ENOMEM;
- goto err_free;
- }
-
- fp->nr_rates = 0;
- fp->rate_min = fp->rate_max = 0;
-
- for (i = 0; i < nr_rates; i++) {
- int rate = combine_quad(&data[2 + 12 * i]);
-
- fp->rate_table[fp->nr_rates] = rate;
- if (!fp->rate_min || rate < fp->rate_min)
- fp->rate_min = rate;
- if (!fp->rate_max || rate > fp->rate_max)
- fp->rate_max = rate;
- fp->rates |= snd_pcm_rate_to_rate_bit(rate);
- fp->nr_rates++;
- }
-
-err_free:
- kfree(data);
-err:
- return ret;
-}
-
-/*
- * parse the format type I and III descriptors
- */
-static int parse_audio_format_i(struct snd_usb_audio *chip,
- struct audioformat *fp,
- int format, void *_fmt,
- struct usb_host_interface *iface)
-{
- struct usb_interface_descriptor *altsd = get_iface_desc(iface);
- struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
- int protocol = altsd->bInterfaceProtocol;
- int pcm_format, ret;
-
- if (fmt->bFormatType == UAC_FORMAT_TYPE_III) {
- /* FIXME: the format type is really IECxxx
- * but we give normal PCM format to get the existing
- * apps working...
- */
- switch (chip->usb_id) {
-
- case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
- if (device_setup[chip->index] == 0x00 &&
- fp->altsetting == 6)
- pcm_format = SNDRV_PCM_FORMAT_S16_BE;
- else
- pcm_format = SNDRV_PCM_FORMAT_S16_LE;
- break;
- default:
- pcm_format = SNDRV_PCM_FORMAT_S16_LE;
- }
- } else {
- pcm_format = parse_audio_format_i_type(chip, fp, format, fmt, protocol);
- if (pcm_format < 0)
- return -1;
- }
-
- fp->format = pcm_format;
-
- /* gather possible sample rates */
- /* audio class v1 reports possible sample rates as part of the
- * proprietary class specific descriptor.
- * audio class v2 uses class specific EP0 range requests for that.
- */
- switch (protocol) {
- case UAC_VERSION_1:
- fp->channels = fmt->bNrChannels;
- ret = parse_audio_format_rates_v1(chip, fp, _fmt, 7);
- break;
- case UAC_VERSION_2:
- /* fp->channels is already set in this case */
- ret = parse_audio_format_rates_v2(chip, fp, iface);
- break;
- }
-
- if (fp->channels < 1) {
- snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
- chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
- return -1;
- }
-
- return ret;
-}
-
-/*
- * parse the format type II descriptor
- */
-static int parse_audio_format_ii(struct snd_usb_audio *chip,
- struct audioformat *fp,
- int format, void *_fmt,
- struct usb_host_interface *iface)
-{
- int brate, framesize, ret;
- struct usb_interface_descriptor *altsd = get_iface_desc(iface);
- int protocol = altsd->bInterfaceProtocol;
-
- switch (format) {
- case UAC_FORMAT_TYPE_II_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 UAC_FORMAT_TYPE_II_MPEG:
- fp->format = SNDRV_PCM_FORMAT_MPEG;
- break;
- default:
- snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
- chip->dev->devnum, fp->iface, fp->altsetting, format);
- fp->format = SNDRV_PCM_FORMAT_MPEG;
- break;
- }
-
- fp->channels = 1;
-
- switch (protocol) {
- case UAC_VERSION_1: {
- struct uac_format_type_ii_discrete_descriptor *fmt = _fmt;
- brate = le16_to_cpu(fmt->wMaxBitRate);
- framesize = le16_to_cpu(fmt->wSamplesPerFrame);
- snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
- fp->frame_size = framesize;
- ret = parse_audio_format_rates_v1(chip, fp, _fmt, 8); /* fmt[8..] sample rates */
- break;
- }
- case UAC_VERSION_2: {
- struct uac_format_type_ii_ext_descriptor *fmt = _fmt;
- brate = le16_to_cpu(fmt->wMaxBitRate);
- framesize = le16_to_cpu(fmt->wSamplesPerFrame);
- snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
- fp->frame_size = framesize;
- ret = parse_audio_format_rates_v2(chip, fp, iface);
- break;
- }
- }
-
- return ret;
-}
-
-static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
- int format, unsigned char *fmt, int stream,
- struct usb_host_interface *iface)
-{
- int err;
-
- switch (fmt[3]) {
- case UAC_FORMAT_TYPE_I:
- case UAC_FORMAT_TYPE_III:
- err = parse_audio_format_i(chip, fp, format, fmt, iface);
- break;
- case UAC_FORMAT_TYPE_II:
- err = parse_audio_format_ii(chip, fp, format, fmt, iface);
- break;
- default:
- snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
- chip->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/audigy 2 nx/zs */
- /* extigy apparently supports sample rates other than 48k
- * but not in ordinary way. so we enable only 48k atm.
- */
- if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
- chip->usb_id == USB_ID(0x041e, 0x3020) ||
- chip->usb_id == USB_ID(0x041e, 0x3061)) {
- if (fmt[3] == UAC_FORMAT_TYPE_I &&
- fp->rates != SNDRV_PCM_RATE_48000 &&
- fp->rates != SNDRV_PCM_RATE_96000)
- return -1;
- }
-#endif
- return 0;
-}
-
-static unsigned char parse_datainterval(struct snd_usb_audio *chip,
- struct usb_host_interface *alts)
-{
- if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH &&
- get_endpoint(alts, 0)->bInterval >= 1 &&
- get_endpoint(alts, 0)->bInterval <= 4)
- return get_endpoint(alts, 0)->bInterval - 1;
- else
- return 0;
-}
-
-static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
- int iface, int altno);
-static int parse_audio_endpoints(struct snd_usb_audio *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 = 0, num_channels = 0;
- struct audioformat *fp = NULL;
- unsigned char *fmt, *csep;
- int num, protocol;
-
- dev = chip->dev;
-
- /* parse the interface's altsettings */
- iface = usb_ifnum_to_if(dev, iface_no);
-
- num = iface->num_altsetting;
-
- /*
- * Dallas DS4201 workaround: It presents 5 altsettings, but the last
- * one misses syncpipe, and does not produce any sound.
- */
- if (chip->usb_id == USB_ID(0x04fa, 0x4201))
- num = 4;
-
- for (i = 0; i < num; i++) {
- alts = &iface->altsetting[i];
- altsd = get_iface_desc(alts);
- protocol = altsd->bInterfaceProtocol;
- /* skip invalid one */
- if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
- altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
- (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
- 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;
-
- /* audiophile usb: skip altsets incompatible with device_setup
- */
- if (chip->usb_id == USB_ID(0x0763, 0x2003) &&
- audiophile_skip_setting_quirk(chip, iface_no, altno))
- continue;
-
- /* get audio formats */
- switch (protocol) {
- case UAC_VERSION_1: {
- struct uac_as_header_descriptor_v1 *as =
- snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
-
- if (!as) {
- snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
- dev->devnum, iface_no, altno);
- continue;
- }
-
- if (as->bLength < sizeof(*as)) {
- snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
- dev->devnum, iface_no, altno);
- continue;
- }
-
- format = le16_to_cpu(as->wFormatTag); /* remember the format value */
- break;
- }
-
- case UAC_VERSION_2: {
- struct uac_as_header_descriptor_v2 *as =
- snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
-
- if (!as) {
- snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
- dev->devnum, iface_no, altno);
- continue;
- }
-
- if (as->bLength < sizeof(*as)) {
- snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
- dev->devnum, iface_no, altno);
- continue;
- }
-
- num_channels = as->bNrChannels;
- format = le32_to_cpu(as->bmFormats);
-
- break;
- }
-
- default:
- snd_printk(KERN_ERR "%d:%u:%d : unknown interface protocol %04x\n",
- dev->devnum, iface_no, altno, protocol);
- continue;
- }
-
- /* get format type */
- fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
- if (!fmt) {
- snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n",
- dev->devnum, iface_no, altno);
- continue;
- }
- if (((protocol == UAC_VERSION_1) && (fmt[0] < 8)) ||
- ((protocol == UAC_VERSION_2) && (fmt[0] != 6))) {
- snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
- dev->devnum, iface_no, altno);
- continue;
- }
-
- /*
- * Blue Microphones workaround: The last altsetting is identical
- * with the previous one, except for a larger packet size, but
- * is actually a mislabeled two-channel setting; ignore it.
- */
- if (fmt[4] == 1 && fmt[5] == 2 && altno == 2 && num == 3 &&
- fp && fp->altsetting == 1 && fp->channels == 1 &&
- fp->format == SNDRV_PCM_FORMAT_S16_LE &&
- protocol == UAC_VERSION_1 &&
- le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
- fp->maxpacksize * 2)
- 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] != UAC_EP_GENERAL) {
- snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
- " class specific endpoint descriptor\n",
- dev->devnum, iface_no, altno);
- csep = NULL;
- }
-
- fp = kzalloc(sizeof(*fp), GFP_KERNEL);
- if (! fp) {
- snd_printk(KERN_ERR "cannot malloc\n");
- return -ENOMEM;
- }
-
- 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;
- fp->datainterval = parse_datainterval(chip, alts);
- fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
- /* num_channels is only set for v2 interfaces */
- fp->channels = num_channels;
- if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
- fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
- * (fp->maxpacksize & 0x7ff);
- fp->attributes = csep ? csep[3] : 0;
-
- /* some quirks for attributes here */
-
- switch (chip->usb_id) {
- case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
- /* Optoplay sets the sample rate attribute although
- * it seems not supporting it in fact.
- */
- fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
- break;
- case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
- case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
- /* doesn't set the sample rate attribute, but supports it */
- fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
- break;
- case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
- case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
- an older model 77d:223) */
- /*
- * plantronics headset and Griffin iMic have set adaptive-in
- * although it's really not...
- */
- fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
- if (stream == SNDRV_PCM_STREAM_PLAYBACK)
- fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
- else
- fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
- break;
- }
-
- /* ok, let's parse further... */
- if (parse_audio_format(chip, fp, format, fmt, stream, alts) < 0) {
- kfree(fp->rate_table);
- kfree(fp);
- continue;
- }
-
- snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, 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)
-{
- int idx;
- struct snd_usb_stream *as;
- struct snd_usb_substream *subs;
-
- as = list_entry(head, struct snd_usb_stream, list);
- for (idx = 0; idx < 2; idx++) {
- subs = &as->substream[idx];
- if (!subs->num_formats)
- return;
- release_substream_urbs(subs, 1);
- subs->interface = -1;
- }
-}
-
-static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface)
-{
- struct usb_device *dev = chip->dev;
- struct usb_host_interface *alts;
- struct usb_interface_descriptor *altsd;
- struct usb_interface *iface = usb_ifnum_to_if(dev, interface);
-
- if (!iface) {
- snd_printk(KERN_ERR "%d:%u:%d : does not exist\n",
- dev->devnum, ctrlif, interface);
- return -EINVAL;
- }
-
- if (usb_interface_claimed(iface)) {
- snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n",
- dev->devnum, ctrlif, interface);
- return -EINVAL;
- }
-
- 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_MIDISTREAMING) {
- int err = snd_usbmidi_create(chip->card, iface,
- &chip->midi_list, NULL);
- if (err < 0) {
- snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n",
- dev->devnum, ctrlif, interface);
- return -EINVAL;
- }
- usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
-
- return 0;
- }
-
- if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
- altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
- altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) {
- snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n",
- dev->devnum, ctrlif, interface, altsd->bInterfaceClass);
- /* skip non-supported classes */
- return -EINVAL;
- }
-
- if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
- snd_printk(KERN_ERR "low speed audio streaming not supported\n");
- return -EINVAL;
- }
-
- if (! parse_audio_endpoints(chip, interface)) {
- usb_set_interface(dev, interface, 0); /* reset the current interface */
- usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * parse audio control descriptor and create pcm/midi streams
- */
-static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
-{
- struct usb_device *dev = chip->dev;
- struct usb_host_interface *host_iface;
- struct usb_interface_descriptor *altsd;
- void *control_header;
- int i, protocol;
-
- /* find audiocontrol interface */
- host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0];
- control_header = snd_usb_find_csint_desc(host_iface->extra,
- host_iface->extralen,
- NULL, UAC_HEADER);
- altsd = get_iface_desc(host_iface);
- protocol = altsd->bInterfaceProtocol;
-
- if (!control_header) {
- snd_printk(KERN_ERR "cannot find UAC_HEADER\n");
- return -EINVAL;
- }
-
- switch (protocol) {
- case UAC_VERSION_1: {
- struct uac_ac_header_descriptor_v1 *h1 = control_header;
-
- if (!h1->bInCollection) {
- snd_printk(KERN_INFO "skipping empty audio interface (v1)\n");
- return -EINVAL;
- }
-
- if (h1->bLength < sizeof(*h1) + h1->bInCollection) {
- snd_printk(KERN_ERR "invalid UAC_HEADER (v1)\n");
- return -EINVAL;
- }
-
- for (i = 0; i < h1->bInCollection; i++)
- snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]);
-
- break;
- }
-
- case UAC_VERSION_2: {
- struct uac_clock_source_descriptor *cs;
- struct usb_interface_assoc_descriptor *assoc =
- usb_ifnum_to_if(dev, ctrlif)->intf_assoc;
-
- if (!assoc) {
- snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n");
- return -EINVAL;
- }
-
- /* FIXME: for now, we expect there is at least one clock source
- * descriptor and we always take the first one.
- * We should properly support devices with multiple clock sources,
- * clock selectors and sample rate conversion units. */
-
- cs = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen,
- NULL, UAC_CLOCK_SOURCE);
-
- if (!cs) {
- snd_printk(KERN_ERR "CLOCK_SOURCE descriptor not found\n");
- return -EINVAL;
- }
-
- chip->clock_id = cs->bClockID;
-
- for (i = 0; i < assoc->bInterfaceCount; i++) {
- int intf = assoc->bFirstInterface + i;
-
- if (intf != ctrlif)
- snd_usb_create_stream(chip, ctrlif, intf);
- }
-
- break;
- }
-
- default:
- snd_printk(KERN_ERR "unknown protocol version 0x%02x\n", protocol);
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * create a stream for an endpoint/altsetting without proper descriptors
- */
-static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
- struct usb_interface *iface,
- const struct snd_usb_audio_quirk *quirk)
-{
- struct audioformat *fp;
- struct usb_host_interface *alts;
- int stream, err;
- unsigned *rate_table = NULL;
-
- fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
- if (! fp) {
- snd_printk(KERN_ERR "cannot memdup\n");
- return -ENOMEM;
- }
- 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];
- fp->datainterval = parse_datainterval(chip, alts);
- fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
- 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_audio_quirk(struct snd_usb_audio *chip,
- struct usb_interface *iface,
- const struct snd_usb_audio_quirk *quirk)
-{
- struct usb_host_interface *alts;
- struct usb_interface_descriptor *altsd;
- int err;
-
- alts = &iface->altsetting[0];
- altsd = get_iface_desc(alts);
- err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
- if (err < 0) {
- snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
- altsd->bInterfaceNumber, err);
- return err;
- }
- /* reset the current interface */
- usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
- return 0;
-}
-
-/*
- * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
- * The only way to detect the sample rate is by looking at wMaxPacketSize.
- */
-static int create_uaxx_quirk(struct snd_usb_audio *chip,
- struct usb_interface *iface,
- const struct snd_usb_audio_quirk *quirk)
-{
- static const struct audioformat ua_format = {
- .format = SNDRV_PCM_FORMAT_S24_3LE,
- .channels = 2,
- .fmt_type = UAC_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 or more altsettings */
- if (iface->num_altsetting < 2)
- return -ENXIO;
- alts = &iface->altsetting[1];
- altsd = get_iface_desc(alts);
-
- if (altsd->bNumEndpoints == 2) {
- static const struct snd_usb_midi_endpoint_info ua700_ep = {
- .out_cables = 0x0003,
- .in_cables = 0x0003
- };
- static const struct snd_usb_audio_quirk ua700_quirk = {
- .type = QUIRK_MIDI_FIXED_ENDPOINT,
- .data = &ua700_ep
- };
- static const struct snd_usb_midi_endpoint_info uaxx_ep = {
- .out_cables = 0x0001,
- .in_cables = 0x0001
- };
- static const struct snd_usb_audio_quirk uaxx_quirk = {
- .type = QUIRK_MIDI_FIXED_ENDPOINT,
- .data = &uaxx_ep
- };
- const struct snd_usb_audio_quirk *quirk =
- chip->usb_id == USB_ID(0x0582, 0x002b)
- ? &ua700_quirk : &uaxx_quirk;
- return snd_usbmidi_create(chip->card, iface,
- &chip->midi_list, 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->datainterval = 0;
- 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;
-}
-
-static int snd_usb_create_quirk(struct snd_usb_audio *chip,
- struct usb_interface *iface,
- const struct snd_usb_audio_quirk *quirk);
-
-/*
- * handle the quirks for the contained interfaces
- */
-static int create_composite_quirk(struct snd_usb_audio *chip,
- struct usb_interface *iface,
- const struct snd_usb_audio_quirk *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;
-}
-
-static int ignore_interface_quirk(struct snd_usb_audio *chip,
- struct usb_interface *iface,
- const struct snd_usb_audio_quirk *quirk)
-{
- return 0;
-}
-
-/*
- * Allow alignment on audio sub-slot (channel samples) rather than
- * on audio slots (audio frames)
- */
-static int create_align_transfer_quirk(struct snd_usb_audio *chip,
- struct usb_interface *iface,
- const struct snd_usb_audio_quirk *quirk)
-{
- chip->txfr_quirk = 1;
- return 1; /* Continue with creating streams and mixer */
-}
-
-
-/*
- * 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;
-}
-
-static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
-{
- u8 buf = 1;
-
- snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
- USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
- 0, 0, &buf, 1, 1000);
- if (buf == 0) {
- snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
- USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
- 1, 2000, NULL, 0, 1000);
- return -ENODEV;
- }
- return 0;
-}
-
-/*
- * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
- * documented in the device's data sheet.
- */
-static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
-{
- u8 buf[4];
- buf[0] = 0x20;
- buf[1] = value & 0xff;
- buf[2] = (value >> 8) & 0xff;
- buf[3] = reg;
- return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
- USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
- 0, 0, &buf, 4, 1000);
-}
-
-static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
-{
- /*
- * Enable line-out driver mode, set headphone source to front
- * channels, enable stereo mic.
- */
- return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
-}
-
-/*
- * C-Media CM6206 is based on CM106 with two additional
- * registers that are not documented in the data sheet.
- * Values here are chosen based on sniffing USB traffic
- * under Windows.
- */
-static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
-{
- int err, reg;
- int val[] = {0x200c, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
-
- for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
- err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
- if (err < 0)
- return err;
- }
-
- return err;
-}
-
-/*
- * This call will put the synth in "USB send" mode, i.e it will send MIDI
- * messages through USB (this is disabled at startup). The synth will
- * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
- * sign on its LCD. Values here are chosen based on sniffing USB traffic
- * under Windows.
- */
-static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
-{
- int err, actual_length;
-
- /* "midi send" enable */
- static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
-
- void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
- ARRAY_SIZE(seq), &actual_length, 1000);
- kfree(buf);
- if (err < 0)
- return err;
-
- return 0;
-}
-
-/*
- * Setup quirks
- */
-#define AUDIOPHILE_SET 0x01 /* if set, parse device_setup */
-#define AUDIOPHILE_SET_DTS 0x02 /* if set, enable DTS Digital Output */
-#define AUDIOPHILE_SET_96K 0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
-#define AUDIOPHILE_SET_24B 0x08 /* 24bits sample if set, 16bits otherwise */
-#define AUDIOPHILE_SET_DI 0x10 /* if set, enable Digital Input */
-#define AUDIOPHILE_SET_MASK 0x1F /* bit mask for setup value */
-#define AUDIOPHILE_SET_24B_48K_DI 0x19 /* value for 24bits+48KHz+Digital Input */
-#define AUDIOPHILE_SET_24B_48K_NOTDI 0x09 /* value for 24bits+48KHz+No Digital Input */
-#define AUDIOPHILE_SET_16B_48K_DI 0x11 /* value for 16bits+48KHz+Digital Input */
-#define AUDIOPHILE_SET_16B_48K_NOTDI 0x01 /* value for 16bits+48KHz+No Digital Input */
-
-static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
- int iface, int altno)
-{
- /* Reset ALL ifaces to 0 altsetting.
- * Call it for every possible altsetting of every interface.
- */
- usb_set_interface(chip->dev, iface, 0);
-
- if (device_setup[chip->index] & AUDIOPHILE_SET) {
- if ((device_setup[chip->index] & AUDIOPHILE_SET_DTS)
- && altno != 6)
- return 1; /* skip this altsetting */
- if ((device_setup[chip->index] & AUDIOPHILE_SET_96K)
- && altno != 1)
- return 1; /* skip this altsetting */
- if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
- AUDIOPHILE_SET_24B_48K_DI && altno != 2)
- return 1; /* skip this altsetting */
- if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
- AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
- return 1; /* skip this altsetting */
- if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
- AUDIOPHILE_SET_16B_48K_DI && altno != 4)
- return 1; /* skip this altsetting */
- if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
- AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
- return 1; /* skip this altsetting */
- }
- return 0; /* keep this altsetting */
-}
-
-static int create_any_midi_quirk(struct snd_usb_audio *chip,
- struct usb_interface *intf,
- const struct snd_usb_audio_quirk *quirk)
-{
- return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
-}
-
-/*
- * 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(struct snd_usb_audio *chip,
- struct usb_interface *iface,
- const struct snd_usb_audio_quirk *quirk)
-{
- typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
- const struct snd_usb_audio_quirk *);
- static const quirk_func_t quirk_funcs[] = {
- [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
- [QUIRK_COMPOSITE] = create_composite_quirk,
- [QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
- [QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
- [QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
- [QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
- [QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
- [QUIRK_MIDI_FASTLANE] = create_any_midi_quirk,
- [QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
- [QUIRK_MIDI_CME] = create_any_midi_quirk,
- [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
- [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
- [QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
- [QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk
- };
-
- if (quirk->type < QUIRK_TYPE_COUNT) {
- return quirk_funcs[quirk->type](chip, iface, quirk);
- } else {
- 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(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
-{
- struct snd_usb_audio *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(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
-{
- struct snd_usb_audio *chip = entry->private_data;
- if (!chip->shutdown)
- snd_iprintf(buffer, "%04x:%04x\n",
- USB_ID_VENDOR(chip->usb_id),
- USB_ID_PRODUCT(chip->usb_id));
-}
-
-static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
-{
- struct snd_info_entry *entry;
- if (!snd_card_proc_new(chip->card, "usbbus", &entry))
- snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
- if (!snd_card_proc_new(chip->card, "usbid", &entry))
- snd_info_set_text_ops(entry, chip, 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(struct snd_usb_audio *chip)
-{
- kfree(chip);
- return 0;
-}
-
-static int snd_usb_audio_dev_free(struct snd_device *device)
-{
- struct snd_usb_audio *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 struct snd_usb_audio_quirk *quirk,
- struct snd_usb_audio **rchip)
-{
- struct snd_card *card;
- struct snd_usb_audio *chip;
- int err, len;
- char component[14];
- static struct snd_device_ops ops = {
- .dev_free = snd_usb_audio_dev_free,
- };
-
- *rchip = NULL;
-
- if (snd_usb_get_speed(dev) != USB_SPEED_LOW &&
- 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;
- }
-
- err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
- if (err < 0) {
- snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
- return err;
- }
-
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
- if (! chip) {
- snd_card_free(card);
- return -ENOMEM;
- }
-
- chip->index = idx;
- chip->dev = dev;
- chip->card = card;
- chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
- le16_to_cpu(dev->descriptor.idProduct));
- INIT_LIST_HEAD(&chip->pcm_list);
- INIT_LIST_HEAD(&chip->midi_list);
- INIT_LIST_HEAD(&chip->mixer_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",
- USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
- 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",
- USB_ID_VENDOR(chip->usb_id),
- USB_ID_PRODUCT(chip->usb_id));
- }
- }
-
- /* 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_LOW ? ", low speed" :
- snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" :
- ", high speed",
- sizeof(card->longname));
-
- snd_usb_audio_create_proc(chip);
-
- *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)
-{
- const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
- int i, err;
- struct snd_usb_audio *chip;
- struct usb_host_interface *alts;
- int ifnum;
- u32 id;
-
- alts = &intf->altsetting[0];
- ifnum = get_iface_desc(alts)->bInterfaceNumber;
- id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
- le16_to_cpu(dev->descriptor.idProduct));
- 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 (id == USB_ID(0x041e, 0x3000)) {
- if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
- goto __err_val;
- }
- /* SB Audigy 2 NX needs its own boot-up magic, too */
- if (id == USB_ID(0x041e, 0x3020)) {
- if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
- goto __err_val;
- }
-
- /* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
- if (id == USB_ID(0x10f5, 0x0200)) {
- if (snd_usb_cm106_boot_quirk(dev) < 0)
- goto __err_val;
- }
-
- /* C-Media CM6206 / CM106-Like Sound Device */
- if (id == USB_ID(0x0d8c, 0x0102)) {
- if (snd_usb_cm6206_boot_quirk(dev) < 0)
- goto __err_val;
- }
-
- /* Access Music VirusTI Desktop */
- if (id == USB_ID(0x133e, 0x0815)) {
- if (snd_usb_accessmusic_boot_quirk(dev) < 0)
- goto __err_val;
- }
-
- /*
- * found a config. now register to ALSA
- */
-
- /* check whether it's already registered */
- chip = NULL;
- mutex_lock(&register_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
- */
- for (i = 0; i < SNDRV_CARDS; i++)
- if (enable[i] && ! usb_chip[i] &&
- (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
- (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
- if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
- goto __error;
- }
- snd_card_set_dev(chip->card, &intf->dev);
- break;
- }
- if (!chip) {
- printk(KERN_ERR "no available usb audio device\n");
- goto __error;
- }
- }
-
- chip->txfr_quirk = 0;
- 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, ignore_ctl_error) < 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++;
- mutex_unlock(&register_mutex);
- return chip;
-
- __error:
- if (chip && !chip->num_interfaces)
- snd_card_free(chip->card);
- mutex_unlock(&register_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)
-{
- struct snd_usb_audio *chip;
- struct snd_card *card;
- struct list_head *p;
-
- if (ptr == (void *)-1L)
- return;
-
- chip = ptr;
- card = chip->card;
- mutex_lock(&register_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);
- }
- /* release the midi resources */
- list_for_each(p, &chip->midi_list) {
- snd_usbmidi_disconnect(p);
- }
- /* release mixer resources */
- list_for_each(p, &chip->mixer_list) {
- snd_usb_mixer_disconnect(p);
- }
- usb_chip[chip->index] = NULL;
- mutex_unlock(&register_mutex);
- snd_card_free_when_closed(card);
- } else {
- mutex_unlock(&register_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) {
- usb_set_intfdata(intf, chip);
- return 0;
- } else
- return -EIO;
-}
-
-static void usb_audio_disconnect(struct usb_interface *intf)
-{
- snd_usb_audio_disconnect(interface_to_usbdev(intf),
- usb_get_intfdata(intf));
-}
-
-#ifdef CONFIG_PM
-static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
-{
- struct snd_usb_audio *chip = usb_get_intfdata(intf);
- struct list_head *p;
- struct snd_usb_stream *as;
-
- if (chip == (void *)-1L)
- return 0;
-
- snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
- if (!chip->num_suspended_intf++) {
- list_for_each(p, &chip->pcm_list) {
- as = list_entry(p, struct snd_usb_stream, list);
- snd_pcm_suspend_all(as->pcm);
- }
- }
-
- return 0;
-}
-
-static int usb_audio_resume(struct usb_interface *intf)
-{
- struct snd_usb_audio *chip = usb_get_intfdata(intf);
-
- if (chip == (void *)-1L)
- return 0;
- if (--chip->num_suspended_intf)
- return 0;
- /*
- * ALSA leaves material resumption to user space
- * we just notify
- */
-
- snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
-
- return 0;
-}
-#endif /* CONFIG_PM */
-
-static int __init snd_usb_audio_init(void)
-{
- if (nrpacks < 1 || nrpacks > MAX_PACKS) {
- printk(KERN_WARNING "invalid nrpacks value.\n");
- return -EINVAL;
- }
- return usb_register(&usb_audio_driver);
-}
-
-
-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);