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-rw-r--r--drivers/usb/class/audio.c3882
1 files changed, 3882 insertions, 0 deletions
diff --git a/drivers/usb/class/audio.c b/drivers/usb/class/audio.c
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index 00000000000..f432b7d5b23
--- /dev/null
+++ b/drivers/usb/class/audio.c
@@ -0,0 +1,3882 @@
+/*****************************************************************************/
+
+/*
+ * audio.c -- USB Audio Class driver
+ *
+ * Copyright (C) 1999, 2000, 2001, 2003, 2004
+ * 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.
+ *
+ * Debugging:
+ * Use the 'lsusb' utility to dump the descriptors.
+ *
+ * 1999-09-07: Alan Cox
+ * Parsing Audio descriptor patch
+ * 1999-09-08: Thomas Sailer
+ * Added OSS compatible data io functions; both parts of the
+ * driver remain to be glued together
+ * 1999-09-10: Thomas Sailer
+ * Beautified the driver. Added sample format conversions.
+ * Still not properly glued with the parsing code.
+ * The parsing code seems to have its problems btw,
+ * Since it parses all available configs but doesn't
+ * store which iface/altsetting belongs to which config.
+ * 1999-09-20: Thomas Sailer
+ * Threw out Alan's parsing code and implemented my own one.
+ * You cannot reasonnably linearly parse audio descriptors,
+ * especially the AudioClass descriptors have to be considered
+ * pointer lists. Mixer parsing untested, due to lack of device.
+ * First stab at synch pipe implementation, the Dallas USB DAC
+ * wants to use an Asynch out pipe. usb_audio_state now basically
+ * only contains lists of mixer and wave devices. We can therefore
+ * now have multiple mixer/wave devices per USB device.
+ * 1999-10-28: Thomas Sailer
+ * Converted to URB API. Fixed a taskstate/wakeup semantics mistake
+ * that made the driver consume all available CPU cycles.
+ * Now runs stable on UHCI-Acher/Fliegl/Sailer.
+ * 1999-10-31: Thomas Sailer
+ * Audio can now be unloaded if it is not in use by any mixer
+ * or dsp client (formerly you had to disconnect the audio devices
+ * from the USB port)
+ * Finally, about three months after ordering, my "Maxxtro SPK222"
+ * speakers arrived, isn't disdata a great mail order company 8-)
+ * Parse class specific endpoint descriptor of the audiostreaming
+ * interfaces and take the endpoint attributes from there.
+ * Unbelievably, the Philips USB DAC has a sampling rate range
+ * of over a decade, yet does not support the sampling rate control!
+ * No wonder it sounds so bad, has very audible sampling rate
+ * conversion distortion. Don't try to listen to it using
+ * decent headphones!
+ * "Let's make things better" -> but please Philips start with your
+ * own stuff!!!!
+ * 1999-11-02: Thomas Sailer
+ * It takes the Philips boxes several seconds to acquire synchronisation
+ * that means they won't play short sounds. Should probably maintain
+ * the ISO datastream even if there's nothing to play.
+ * Fix counting the total_bytes counter, RealPlayer G2 depends on it.
+ * 1999-12-20: Thomas Sailer
+ * Fix bad bug in conversion to per interface probing.
+ * disconnect was called multiple times for the audio device,
+ * leading to a premature freeing of the audio structures
+ * 2000-05-13: Thomas Sailer
+ * I don't remember who changed the find_format routine,
+ * but the change was completely broken for the Dallas
+ * chip. Anyway taking sampling rate into account in find_format
+ * is bad and should not be done unless there are devices with
+ * completely broken audio descriptors. Unless someone shows
+ * me such a descriptor, I will not allow find_format to
+ * take the sampling rate into account.
+ * Also, the former find_format made:
+ * - mpg123 play mono instead of stereo
+ * - sox completely fail for wav's with sample rates < 44.1kHz
+ * for the Dallas chip.
+ * Also fix a rather long standing problem with applications that
+ * use "small" writes producing no sound at all.
+ * 2000-05-15: Thomas Sailer
+ * My fears came true, the Philips camera indeed has pretty stupid
+ * audio descriptors.
+ * 2000-05-17: Thomas Sailer
+ * Nemsoft spotted my stupid last minute change, thanks
+ * 2000-05-19: Thomas Sailer
+ * Fixed FEATURE_UNIT thinkos found thanks to the KC Technology
+ * Xtend device. Basically the driver treated FEATURE_UNIT's sourced
+ * by mono terminals as stereo.
+ * 2000-05-20: Thomas Sailer
+ * SELECTOR support (and thus selecting record channels from the mixer).
+ * Somewhat peculiar due to OSS interface limitations. Only works
+ * for channels where a "slider" is already in front of it (i.e.
+ * a MIXER unit or a FEATURE unit with volume capability).
+ * 2000-11-26: Thomas Sailer
+ * Workaround for Dallas DS4201. The DS4201 uses PCM8 as format tag for
+ * its 8 bit modes, but expects signed data (and should therefore have used PCM).
+ * 2001-03-10: Thomas Sailer
+ * provide abs function, prevent picking up a bogus kernel macro
+ * for abs. Bug report by Andrew Morton <andrewm@uow.edu.au>
+ * 2001-06-16: Bryce Nesbitt <bryce@obviously.com>
+ * Fix SNDCTL_DSP_STEREO API violation
+ * 2003-04-08: Oliver Neukum (oliver@neukum.name):
+ * Setting a configuration is done by usbcore and must not be overridden
+ * 2004-02-27: Workaround for broken synch descriptors
+ * 2004-03-07: Alan Stern <stern@rowland.harvard.edu>
+ * Add usb_ifnum_to_if() and usb_altnum_to_altsetting() support.
+ * Use the in-memory descriptors instead of reading them from the device.
+ *
+ */
+
+/*
+ * Strategy:
+ *
+ * Alan Cox and Thomas Sailer are starting to dig at opposite ends and
+ * are hoping to meet in the middle, just like tunnel diggers :)
+ * Alan tackles the descriptor parsing, Thomas the actual data IO and the
+ * OSS compatible interface.
+ *
+ * Data IO implementation issues
+ *
+ * A mmap'able ring buffer per direction is implemented, because
+ * almost every OSS app expects it. It is however impractical to
+ * transmit/receive USB data directly into and out of the ring buffer,
+ * due to alignment and synchronisation issues. Instead, the ring buffer
+ * feeds a constant time delay line that handles the USB issues.
+ *
+ * Now we first try to find an alternate setting that exactly matches
+ * the sample format requested by the user. If we find one, we do not
+ * need to perform any sample rate conversions. If there is no matching
+ * altsetting, we choose the closest one and perform sample format
+ * conversions. We never do sample rate conversion; these are too
+ * expensive to be performed in the kernel.
+ *
+ * Current status: no known HCD-specific issues.
+ *
+ * Generally: Due to the brokenness of the Audio Class spec
+ * it seems generally impossible to write a generic Audio Class driver,
+ * so a reasonable driver should implement the features that are actually
+ * used.
+ *
+ * Parsing implementation issues
+ *
+ * One cannot reasonably parse the AudioClass descriptors linearly.
+ * Therefore the current implementation features routines to look
+ * for a specific descriptor in the descriptor list.
+ *
+ * How does the parsing work? First, all interfaces are searched
+ * for an AudioControl class interface. If found, the config descriptor
+ * that belongs to the current configuration is searched and
+ * the HEADER descriptor is found. It contains a list of
+ * all AudioStreaming and MIDIStreaming devices. This list is then walked,
+ * and all AudioStreaming interfaces are classified into input and output
+ * interfaces (according to the endpoint0 direction in altsetting1) (MIDIStreaming
+ * is currently not supported). The input & output list is then used
+ * to group inputs and outputs together and issued pairwise to the
+ * AudioStreaming class parser. Finally, all OUTPUT_TERMINAL descriptors
+ * are walked and issued to the mixer construction routine.
+ *
+ * The AudioStreaming parser simply enumerates all altsettings belonging
+ * to the specified interface. It looks for AS_GENERAL and FORMAT_TYPE
+ * class specific descriptors to extract the sample format/sample rate
+ * data. Only sample format types PCM and PCM8 are supported right now, and
+ * only FORMAT_TYPE_I is handled. The isochronous data endpoint needs to
+ * be the first endpoint of the interface, and the optional synchronisation
+ * isochronous endpoint the second one.
+ *
+ * Mixer construction works as follows: The various TERMINAL and UNIT
+ * descriptors span a tree from the root (OUTPUT_TERMINAL) through the
+ * intermediate nodes (UNITs) to the leaves (INPUT_TERMINAL). We walk
+ * that tree in a depth first manner. FEATURE_UNITs may contribute volume,
+ * bass and treble sliders to the mixer, MIXER_UNITs volume sliders.
+ * The terminal type encoded in the INPUT_TERMINALs feeds a heuristic
+ * to determine "meaningful" OSS slider numbers, however we will see
+ * how well this works in practice. Other features are not used at the
+ * moment, they seem less often used. Also, it seems difficult at least
+ * to construct recording source switches from SELECTOR_UNITs, but
+ * since there are not many USB ADC's available, we leave that for later.
+ */
+
+/*****************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/module.h>
+#include <linux/sound.h>
+#include <linux/soundcard.h>
+#include <linux/list.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/bitops.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <linux/usb.h>
+
+#include "audio.h"
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "v1.0.0"
+#define DRIVER_AUTHOR "Alan Cox <alan@lxorguk.ukuu.org.uk>, Thomas Sailer (sailer@ife.ee.ethz.ch)"
+#define DRIVER_DESC "USB Audio Class driver"
+
+#define AUDIO_DEBUG 1
+
+#define SND_DEV_DSP16 5
+
+#define dprintk(x)
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * Linked list of all audio devices...
+ */
+static struct list_head audiodevs = LIST_HEAD_INIT(audiodevs);
+static DECLARE_MUTEX(open_sem);
+
+/*
+ * wait queue for processes wanting to open an USB audio device
+ */
+static DECLARE_WAIT_QUEUE_HEAD(open_wait);
+
+
+#define MAXFORMATS MAX_ALT
+#define DMABUFSHIFT 17 /* 128k worth of DMA buffer */
+#define NRSGBUF (1U<<(DMABUFSHIFT-PAGE_SHIFT))
+
+/*
+ * This influences:
+ * - Latency
+ * - Interrupt rate
+ * - Synchronisation behaviour
+ * Don't touch this if you don't understand all of the above.
+ */
+#define DESCFRAMES 5
+#define SYNCFRAMES DESCFRAMES
+
+#define MIXFLG_STEREOIN 1
+#define MIXFLG_STEREOOUT 2
+
+struct mixerchannel {
+ __u16 value;
+ __u16 osschannel; /* number of the OSS channel */
+ __s16 minval, maxval;
+ __u16 slctunitid;
+ __u8 unitid;
+ __u8 selector;
+ __u8 chnum;
+ __u8 flags;
+};
+
+struct audioformat {
+ unsigned int format;
+ unsigned int sratelo;
+ unsigned int sratehi;
+ unsigned char altsetting;
+ unsigned char attributes;
+};
+
+struct dmabuf {
+ /* buffer data format */
+ unsigned int format;
+ unsigned int srate;
+ /* physical buffer */
+ unsigned char *sgbuf[NRSGBUF];
+ unsigned bufsize;
+ unsigned numfrag;
+ unsigned fragshift;
+ unsigned wrptr, rdptr;
+ unsigned total_bytes;
+ int count;
+ unsigned error; /* over/underrun */
+ wait_queue_head_t wait;
+ /* redundant, but makes calculations easier */
+ unsigned fragsize;
+ unsigned dmasize;
+ /* OSS stuff */
+ unsigned mapped:1;
+ unsigned ready:1;
+ unsigned ossfragshift;
+ int ossmaxfrags;
+ unsigned subdivision;
+};
+
+struct usb_audio_state;
+
+#define FLG_URB0RUNNING 1
+#define FLG_URB1RUNNING 2
+#define FLG_SYNC0RUNNING 4
+#define FLG_SYNC1RUNNING 8
+#define FLG_RUNNING 16
+#define FLG_CONNECTED 32
+
+struct my_data_urb {
+ struct urb *urb;
+};
+
+struct my_sync_urb {
+ struct urb *urb;
+};
+
+
+struct usb_audiodev {
+ struct list_head list;
+ struct usb_audio_state *state;
+
+ /* soundcore stuff */
+ int dev_audio;
+
+ /* wave stuff */
+ mode_t open_mode;
+ spinlock_t lock; /* DMA buffer access spinlock */
+
+ struct usbin {
+ int interface; /* Interface number, -1 means not used */
+ unsigned int format; /* USB data format */
+ unsigned int datapipe; /* the data input pipe */
+ unsigned int syncpipe; /* the synchronisation pipe - 0 for anything but adaptive IN mode */
+ unsigned int syncinterval; /* P for adaptive IN mode, 0 otherwise */
+ unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */
+ unsigned int freqmax; /* maximum sampling rate, used for buffer management */
+ unsigned int phase; /* phase accumulator */
+ unsigned int flags; /* see FLG_ defines */
+
+ struct my_data_urb durb[2]; /* ISO descriptors for the data endpoint */
+ struct my_sync_urb surb[2]; /* ISO sync pipe descriptor if needed */
+
+ struct dmabuf dma;
+ } usbin;
+
+ struct usbout {
+ int interface; /* Interface number, -1 means not used */
+ unsigned int format; /* USB data format */
+ unsigned int datapipe; /* the data input pipe */
+ unsigned int syncpipe; /* the synchronisation pipe - 0 for anything but asynchronous OUT mode */
+ unsigned int syncinterval; /* P for asynchronous OUT mode, 0 otherwise */
+ unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */
+ unsigned int freqm; /* momentary sampling rate in USB format, i.e. fs/1000 in Q10.14 */
+ unsigned int freqmax; /* maximum sampling rate, used for buffer management */
+ unsigned int phase; /* phase accumulator */
+ unsigned int flags; /* see FLG_ defines */
+
+ struct my_data_urb durb[2]; /* ISO descriptors for the data endpoint */
+ struct my_sync_urb surb[2]; /* ISO sync pipe descriptor if needed */
+
+ struct dmabuf dma;
+ } usbout;
+
+
+ unsigned int numfmtin, numfmtout;
+ struct audioformat fmtin[MAXFORMATS];
+ struct audioformat fmtout[MAXFORMATS];
+};
+
+struct usb_mixerdev {
+ struct list_head list;
+ struct usb_audio_state *state;
+
+ /* soundcore stuff */
+ int dev_mixer;
+
+ unsigned char iface; /* interface number of the AudioControl interface */
+
+ /* USB format descriptions */
+ unsigned int numch, modcnt;
+
+ /* mixch is last and gets allocated dynamically */
+ struct mixerchannel ch[0];
+};
+
+struct usb_audio_state {
+ struct list_head audiodev;
+
+ /* USB device */
+ struct usb_device *usbdev;
+
+ struct list_head audiolist;
+ struct list_head mixerlist;
+
+ unsigned count; /* usage counter; NOTE: the usb stack is also considered a user */
+};
+
+/* private audio format extensions */
+#define AFMT_STEREO 0x80000000
+#define AFMT_ISSTEREO(x) ((x) & AFMT_STEREO)
+#define AFMT_IS16BIT(x) ((x) & (AFMT_S16_LE|AFMT_S16_BE|AFMT_U16_LE|AFMT_U16_BE))
+#define AFMT_ISUNSIGNED(x) ((x) & (AFMT_U8|AFMT_U16_LE|AFMT_U16_BE))
+#define AFMT_BYTESSHIFT(x) ((AFMT_ISSTEREO(x) ? 1 : 0) + (AFMT_IS16BIT(x) ? 1 : 0))
+#define AFMT_BYTES(x) (1<<AFMT_BYTESSHFIT(x))
+
+/* --------------------------------------------------------------------- */
+
+static inline unsigned ld2(unsigned int x)
+{
+ unsigned r = 0;
+
+ if (x >= 0x10000) {
+ x >>= 16;
+ r += 16;
+ }
+ if (x >= 0x100) {
+ x >>= 8;
+ r += 8;
+ }
+ if (x >= 0x10) {
+ x >>= 4;
+ r += 4;
+ }
+ if (x >= 4) {
+ x >>= 2;
+ r += 2;
+ }
+ if (x >= 2)
+ r++;
+ return r;
+}
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * OSS compatible ring buffer management. The ring buffer may be mmap'ed into
+ * an application address space.
+ *
+ * I first used the rvmalloc stuff copied from bttv. Alan Cox did not like it, so
+ * we now use an array of pointers to a single page each. This saves us the
+ * kernel page table manipulations, but we have to do a page table alike mechanism
+ * (though only one indirection) in software.
+ */
+
+static void dmabuf_release(struct dmabuf *db)
+{
+ unsigned int nr;
+ void *p;
+
+ for(nr = 0; nr < NRSGBUF; nr++) {
+ if (!(p = db->sgbuf[nr]))
+ continue;
+ ClearPageReserved(virt_to_page(p));
+ free_page((unsigned long)p);
+ db->sgbuf[nr] = NULL;
+ }
+ db->mapped = db->ready = 0;
+}
+
+static int dmabuf_init(struct dmabuf *db)
+{
+ unsigned int nr, bytepersec, bufs;
+ void *p;
+
+ /* initialize some fields */
+ db->rdptr = db->wrptr = db->total_bytes = db->count = db->error = 0;
+ /* calculate required buffer size */
+ bytepersec = db->srate << AFMT_BYTESSHIFT(db->format);
+ bufs = 1U << DMABUFSHIFT;
+ if (db->ossfragshift) {
+ if ((1000 << db->ossfragshift) < bytepersec)
+ db->fragshift = ld2(bytepersec/1000);
+ else
+ db->fragshift = db->ossfragshift;
+ } else {
+ db->fragshift = ld2(bytepersec/100/(db->subdivision ? db->subdivision : 1));
+ if (db->fragshift < 3)
+ db->fragshift = 3;
+ }
+ db->numfrag = bufs >> db->fragshift;
+ while (db->numfrag < 4 && db->fragshift > 3) {
+ db->fragshift--;
+ db->numfrag = bufs >> db->fragshift;
+ }
+ db->fragsize = 1 << db->fragshift;
+ if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
+ db->numfrag = db->ossmaxfrags;
+ db->dmasize = db->numfrag << db->fragshift;
+ for(nr = 0; nr < NRSGBUF; nr++) {
+ if (!db->sgbuf[nr]) {
+ p = (void *)get_zeroed_page(GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+ db->sgbuf[nr] = p;
+ SetPageReserved(virt_to_page(p));
+ }
+ memset(db->sgbuf[nr], AFMT_ISUNSIGNED(db->format) ? 0x80 : 0, PAGE_SIZE);
+ if ((nr << PAGE_SHIFT) >= db->dmasize)
+ break;
+ }
+ db->bufsize = nr << PAGE_SHIFT;
+ db->ready = 1;
+ dprintk((KERN_DEBUG "usbaudio: dmabuf_init bytepersec %d bufs %d ossfragshift %d ossmaxfrags %d "
+ "fragshift %d fragsize %d numfrag %d dmasize %d bufsize %d fmt 0x%x srate %d\n",
+ bytepersec, bufs, db->ossfragshift, db->ossmaxfrags, db->fragshift, db->fragsize,
+ db->numfrag, db->dmasize, db->bufsize, db->format, db->srate));
+ return 0;
+}
+
+static int dmabuf_mmap(struct vm_area_struct *vma, struct dmabuf *db, unsigned long start, unsigned long size, pgprot_t prot)
+{
+ unsigned int nr;
+
+ if (!db->ready || db->mapped || (start | size) & (PAGE_SIZE-1) || size > db->bufsize)
+ return -EINVAL;
+ size >>= PAGE_SHIFT;
+ for(nr = 0; nr < size; nr++)
+ if (!db->sgbuf[nr])
+ return -EINVAL;
+ db->mapped = 1;
+ for(nr = 0; nr < size; nr++) {
+ unsigned long pfn;
+
+ pfn = virt_to_phys(db->sgbuf[nr]) >> PAGE_SHIFT;
+ if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, prot))
+ return -EAGAIN;
+ start += PAGE_SIZE;
+ }
+ return 0;
+}
+
+static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int size)
+{
+ unsigned int pgrem, rem;
+
+ db->total_bytes += size;
+ for (;;) {
+ if (size <= 0)
+ return;
+ pgrem = ((~db->wrptr) & (PAGE_SIZE-1)) + 1;
+ if (pgrem > size)
+ pgrem = size;
+ rem = db->dmasize - db->wrptr;
+ if (pgrem > rem)
+ pgrem = rem;
+ memcpy((db->sgbuf[db->wrptr >> PAGE_SHIFT]) + (db->wrptr & (PAGE_SIZE-1)), buffer, pgrem);
+ size -= pgrem;
+ buffer += pgrem;
+ db->wrptr += pgrem;
+ if (db->wrptr >= db->dmasize)
+ db->wrptr = 0;
+ }
+}
+
+static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size)
+{
+ unsigned int pgrem, rem;
+
+ db->total_bytes += size;
+ for (;;) {
+ if (size <= 0)
+ return;
+ pgrem = ((~db->rdptr) & (PAGE_SIZE-1)) + 1;
+ if (pgrem > size)
+ pgrem = size;
+ rem = db->dmasize - db->rdptr;
+ if (pgrem > rem)
+ pgrem = rem;
+ memcpy(buffer, (db->sgbuf[db->rdptr >> PAGE_SHIFT]) + (db->rdptr & (PAGE_SIZE-1)), pgrem);
+ size -= pgrem;
+ buffer += pgrem;
+ db->rdptr += pgrem;
+ if (db->rdptr >= db->dmasize)
+ db->rdptr = 0;
+ }
+}
+
+static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void __user *buffer, unsigned int size)
+{
+ unsigned int pgrem, rem;
+
+ if (!db->ready || db->mapped)
+ return -EINVAL;
+ for (;;) {
+ if (size <= 0)
+ return 0;
+ pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
+ if (pgrem > size)
+ pgrem = size;
+ rem = db->dmasize - ptr;
+ if (pgrem > rem)
+ pgrem = rem;
+ if (copy_from_user((db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), buffer, pgrem))
+ return -EFAULT;
+ size -= pgrem;
+ buffer += pgrem;
+ ptr += pgrem;
+ if (ptr >= db->dmasize)
+ ptr = 0;
+ }
+}
+
+static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void __user *buffer, unsigned int size)
+{
+ unsigned int pgrem, rem;
+
+ if (!db->ready || db->mapped)
+ return -EINVAL;
+ for (;;) {
+ if (size <= 0)
+ return 0;
+ pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
+ if (pgrem > size)
+ pgrem = size;
+ rem = db->dmasize - ptr;
+ if (pgrem > rem)
+ pgrem = rem;
+ if (copy_to_user(buffer, (db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), pgrem))
+ return -EFAULT;
+ size -= pgrem;
+ buffer += pgrem;
+ ptr += pgrem;
+ if (ptr >= db->dmasize)
+ ptr = 0;
+ }
+}
+
+/* --------------------------------------------------------------------- */
+/*
+ * USB I/O code. We do sample format conversion if necessary
+ */
+
+static void usbin_stop(struct usb_audiodev *as)
+{
+ struct usbin *u = &as->usbin;
+ unsigned long flags;
+ unsigned int i, notkilled = 1;
+
+ spin_lock_irqsave(&as->lock, flags);
+ u->flags &= ~FLG_RUNNING;
+ i = u->flags;
+ spin_unlock_irqrestore(&as->lock, flags);
+ while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
+ set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ spin_lock_irqsave(&as->lock, flags);
+ i = u->flags;
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (notkilled && signal_pending(current)) {
+ if (i & FLG_URB0RUNNING)
+ usb_kill_urb(u->durb[0].urb);
+ if (i & FLG_URB1RUNNING)
+ usb_kill_urb(u->durb[1].urb);
+ if (i & FLG_SYNC0RUNNING)
+ usb_kill_urb(u->surb[0].urb);
+ if (i & FLG_SYNC1RUNNING)
+ usb_kill_urb(u->surb[1].urb);
+ notkilled = 0;
+ }
+ }
+ set_current_state(TASK_RUNNING);
+ if (u->durb[0].urb->transfer_buffer)
+ kfree(u->durb[0].urb->transfer_buffer);
+ if (u->durb[1].urb->transfer_buffer)
+ kfree(u->durb[1].urb->transfer_buffer);
+ if (u->surb[0].urb->transfer_buffer)
+ kfree(u->surb[0].urb->transfer_buffer);
+ if (u->surb[1].urb->transfer_buffer)
+ kfree(u->surb[1].urb->transfer_buffer);
+ u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
+ u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
+}
+
+static inline void usbin_release(struct usb_audiodev *as)
+{
+ usbin_stop(as);
+}
+
+static void usbin_disc(struct usb_audiodev *as)
+{
+ struct usbin *u = &as->usbin;
+
+ unsigned long flags;
+
+ spin_lock_irqsave(&as->lock, flags);
+ u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
+ spin_unlock_irqrestore(&as->lock, flags);
+ usbin_stop(as);
+}
+
+static void conversion(const void *ibuf, unsigned int ifmt, void *obuf, unsigned int ofmt, void *tmp, unsigned int scnt)
+{
+ unsigned int cnt, i;
+ __s16 *sp, *sp2, s;
+ unsigned char *bp;
+
+ cnt = scnt;
+ if (AFMT_ISSTEREO(ifmt))
+ cnt <<= 1;
+ sp = ((__s16 *)tmp) + cnt;
+ switch (ifmt & ~AFMT_STEREO) {
+ case AFMT_U8:
+ for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
+ bp--;
+ sp--;
+ *sp = (*bp ^ 0x80) << 8;
+ }
+ break;
+
+ case AFMT_S8:
+ for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
+ bp--;
+ sp--;
+ *sp = *bp << 8;
+ }
+ break;
+
+ case AFMT_U16_LE:
+ for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = (bp[0] | (bp[1] << 8)) ^ 0x8000;
+ }
+ break;
+
+ case AFMT_U16_BE:
+ for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = (bp[1] | (bp[0] << 8)) ^ 0x8000;
+ }
+ break;
+
+ case AFMT_S16_LE:
+ for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = bp[0] | (bp[1] << 8);
+ }
+ break;
+
+ case AFMT_S16_BE:
+ for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = bp[1] | (bp[0] << 8);
+ }
+ break;
+ }
+ if (!AFMT_ISSTEREO(ifmt) && AFMT_ISSTEREO(ofmt)) {
+ /* expand from mono to stereo */
+ for (sp = ((__s16 *)tmp)+scnt, sp2 = ((__s16 *)tmp)+2*scnt, i = 0; i < scnt; i++) {
+ sp--;
+ sp2 -= 2;
+ sp2[0] = sp2[1] = sp[0];
+ }
+ }
+ if (AFMT_ISSTEREO(ifmt) && !AFMT_ISSTEREO(ofmt)) {
+ /* contract from stereo to mono */
+ for (sp = sp2 = ((__s16 *)tmp), i = 0; i < scnt; i++, sp++, sp2 += 2)
+ sp[0] = (sp2[0] + sp2[1]) >> 1;
+ }
+ cnt = scnt;
+ if (AFMT_ISSTEREO(ofmt))
+ cnt <<= 1;
+ sp = ((__s16 *)tmp);
+ bp = ((unsigned char *)obuf);
+ switch (ofmt & ~AFMT_STEREO) {
+ case AFMT_U8:
+ for (i = 0; i < cnt; i++, sp++, bp++)
+ *bp = (*sp >> 8) ^ 0x80;
+ break;
+
+ case AFMT_S8:
+ for (i = 0; i < cnt; i++, sp++, bp++)
+ *bp = *sp >> 8;
+ break;
+
+ case AFMT_U16_LE:
+ for (i = 0; i < cnt; i++, sp++, bp += 2) {
+ s = *sp;
+ bp[0] = s;
+ bp[1] = (s >> 8) ^ 0x80;
+ }
+ break;
+
+ case AFMT_U16_BE:
+ for (i = 0; i < cnt; i++, sp++, bp += 2) {
+ s = *sp;
+ bp[1] = s;
+ bp[0] = (s >> 8) ^ 0x80;
+ }
+ break;
+
+ case AFMT_S16_LE:
+ for (i = 0; i < cnt; i++, sp++, bp += 2) {
+ s = *sp;
+ bp[0] = s;
+ bp[1] = s >> 8;
+ }
+ break;
+
+ case AFMT_S16_BE:
+ for (i = 0; i < cnt; i++, sp++, bp += 2) {
+ s = *sp;
+ bp[1] = s;
+ bp[0] = s >> 8;
+ }
+ break;
+ }
+
+}
+
+static void usbin_convert(struct usbin *u, unsigned char *buffer, unsigned int samples)
+{
+ union {
+ __s16 s[64];
+ unsigned char b[0];
+ } tmp;
+ unsigned int scnt, maxs, ufmtsh, dfmtsh;
+
+ ufmtsh = AFMT_BYTESSHIFT(u->format);
+ dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
+ maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
+ while (samples > 0) {
+ scnt = samples;
+ if (scnt > maxs)
+ scnt = maxs;
+ conversion(buffer, u->format, tmp.b, u->dma.format, tmp.b, scnt);
+ dmabuf_copyin(&u->dma, tmp.b, scnt << dfmtsh);
+ buffer += scnt << ufmtsh;
+ samples -= scnt;
+ }
+}
+
+static int usbin_prepare_desc(struct usbin *u, struct urb *urb)
+{
+ unsigned int i, maxsize, offs;
+
+ maxsize = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
+ //printk(KERN_DEBUG "usbin_prepare_desc: maxsize %d freq 0x%x format 0x%x\n", maxsize, u->freqn, u->format);
+ for (i = offs = 0; i < DESCFRAMES; i++, offs += maxsize) {
+ urb->iso_frame_desc[i].length = maxsize;
+ urb->iso_frame_desc[i].offset = offs;
+ }
+ urb->interval = 1;
+ return 0;
+}
+
+/*
+ * return value: 0 if descriptor should be restarted, -1 otherwise
+ * convert sample format on the fly if necessary
+ */
+static int usbin_retire_desc(struct usbin *u, struct urb *urb)
+{
+ unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, dmafree;
+ unsigned char *cp;
+
+ ufmtsh = AFMT_BYTESSHIFT(u->format);
+ dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
+ for (i = 0; i < DESCFRAMES; i++) {
+ cp = ((unsigned char *)urb->transfer_buffer) + urb->iso_frame_desc[i].offset;
+ if (urb->iso_frame_desc[i].status) {
+ dprintk((KERN_DEBUG "usbin_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
+ continue;
+ }
+ scnt = urb->iso_frame_desc[i].actual_length >> ufmtsh;
+ if (!scnt)
+ continue;
+ cnt = scnt << dfmtsh;
+ if (!u->dma.mapped) {
+ dmafree = u->dma.dmasize - u->dma.count;
+ if (cnt > dmafree) {
+ scnt = dmafree >> dfmtsh;
+ cnt = scnt << dfmtsh;
+ err++;
+ }
+ }
+ u->dma.count += cnt;
+ if (u->format == u->dma.format) {
+ /* we do not need format conversion */
+ dprintk((KERN_DEBUG "usbaudio: no sample format conversion\n"));
+ dmabuf_copyin(&u->dma, cp, cnt);
+ } else {
+ /* we need sampling format conversion */
+ dprintk((KERN_DEBUG "usbaudio: sample format conversion %x != %x\n", u->format, u->dma.format));
+ usbin_convert(u, cp, scnt);
+ }
+ }
+ if (err)
+ u->dma.error++;
+ if (u->dma.count >= (signed)u->dma.fragsize)
+ wake_up(&u->dma.wait);
+ return err ? -1 : 0;
+}
+
+static void usbin_completed(struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
+ struct usbin *u = &as->usbin;
+ unsigned long flags;
+ unsigned int mask;
+ int suret = 0;
+
+#if 0
+ printk(KERN_DEBUG "usbin_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
+#endif
+ if (urb == u->durb[0].urb)
+ mask = FLG_URB0RUNNING;
+ else if (urb == u->durb[1].urb)
+ mask = FLG_URB1RUNNING;
+ else {
+ mask = 0;
+ printk(KERN_ERR "usbin_completed: panic: unknown URB\n");
+ }
+ urb->dev = as->state->usbdev;
+ spin_lock_irqsave(&as->lock, flags);
+ if (!usbin_retire_desc(u, urb) &&
+ u->flags & FLG_RUNNING &&
+ !usbin_prepare_desc(u, urb) &&
+ (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
+ u->flags |= mask;
+ } else {
+ u->flags &= ~(mask | FLG_RUNNING);
+ wake_up(&u->dma.wait);
+ printk(KERN_DEBUG "usbin_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret);
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+}
+
+/*
+ * we output sync data
+ */
+static int usbin_sync_prepare_desc(struct usbin *u, struct urb *urb)
+{
+ unsigned char *cp = urb->transfer_buffer;
+ unsigned int i, offs;
+
+ for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3, cp += 3) {
+ urb->iso_frame_desc[i].length = 3;
+ urb->iso_frame_desc[i].offset = offs;
+ cp[0] = u->freqn;
+ cp[1] = u->freqn >> 8;
+ cp[2] = u->freqn >> 16;
+ }
+ urb->interval = 1;
+ return 0;
+}
+
+/*
+ * return value: 0 if descriptor should be restarted, -1 otherwise
+ */
+static int usbin_sync_retire_desc(struct usbin *u, struct urb *urb)
+{
+ unsigned int i;
+
+ for (i = 0; i < SYNCFRAMES; i++)
+ if (urb->iso_frame_desc[0].status)
+ dprintk((KERN_DEBUG "usbin_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
+ return 0;
+}
+
+static void usbin_sync_completed(struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
+ struct usbin *u = &as->usbin;
+ unsigned long flags;
+ unsigned int mask;
+ int suret = 0;
+
+#if 0
+ printk(KERN_DEBUG "usbin_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
+#endif
+ if (urb == u->surb[0].urb)
+ mask = FLG_SYNC0RUNNING;
+ else if (urb == u->surb[1].urb)
+ mask = FLG_SYNC1RUNNING;
+ else {
+ mask = 0;
+ printk(KERN_ERR "usbin_sync_completed: panic: unknown URB\n");
+ }
+ urb->dev = as->state->usbdev;
+ spin_lock_irqsave(&as->lock, flags);
+ if (!usbin_sync_retire_desc(u, urb) &&
+ u->flags & FLG_RUNNING &&
+ !usbin_sync_prepare_desc(u, urb) &&
+ (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
+ u->flags |= mask;
+ } else {
+ u->flags &= ~(mask | FLG_RUNNING);
+ wake_up(&u->dma.wait);
+ dprintk((KERN_DEBUG "usbin_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+}
+
+static int usbin_start(struct usb_audiodev *as)
+{
+ struct usb_device *dev = as->state->usbdev;
+ struct usbin *u = &as->usbin;
+ struct urb *urb;
+ unsigned long flags;
+ unsigned int maxsze, bufsz;
+
+#if 0
+ printk(KERN_DEBUG "usbin_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
+ dev->devnum, u->format, u->dma.format, u->dma.srate);
+#endif
+ /* allocate USB storage if not already done */
+ spin_lock_irqsave(&as->lock, flags);
+ if (!(u->flags & FLG_CONNECTED)) {
+ spin_unlock_irqrestore(&as->lock, flags);
+ return -EIO;
+ }
+ if (!(u->flags & FLG_RUNNING)) {
+ spin_unlock_irqrestore(&as->lock, flags);
+ u->freqn = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
+ u->freqmax = u->freqn + (u->freqn >> 2);
+ u->phase = 0;
+ maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
+ bufsz = DESCFRAMES * maxsze;
+ if (u->durb[0].urb->transfer_buffer)
+ kfree(u->durb[0].urb->transfer_buffer);
+ u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
+ u->durb[0].urb->transfer_buffer_length = bufsz;
+ if (u->durb[1].urb->transfer_buffer)
+ kfree(u->durb[1].urb->transfer_buffer);
+ u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
+ u->durb[1].urb->transfer_buffer_length = bufsz;
+ if (u->syncpipe) {
+ if (u->surb[0].urb->transfer_buffer)
+ kfree(u->surb[0].urb->transfer_buffer);
+ u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
+ u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
+ if (u->surb[1].urb->transfer_buffer)
+ kfree(u->surb[1].urb->transfer_buffer);
+ u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
+ u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
+ }
+ if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
+ (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
+ printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
+ return 0;
+ }
+ spin_lock_irqsave(&as->lock, flags);
+ }
+ if (u->dma.count >= u->dma.dmasize && !u->dma.mapped) {
+ spin_unlock_irqrestore(&as->lock, flags);
+ return 0;
+ }
+ u->flags |= FLG_RUNNING;
+ if (!(u->flags & FLG_URB0RUNNING)) {
+ urb = u->durb[0].urb;
+ urb->dev = dev;
+ urb->pipe = u->datapipe;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = DESCFRAMES;
+ urb->context = as;
+ urb->complete = usbin_completed;
+ if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
+ u->flags |= FLG_URB0RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
+ urb = u->durb[1].urb;
+ urb->dev = dev;
+ urb->pipe = u->datapipe;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = DESCFRAMES;
+ urb->context = as;
+ urb->complete = usbin_completed;
+ if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
+ u->flags |= FLG_URB1RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ if (u->syncpipe) {
+ if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
+ urb = u->surb[0].urb;
+ urb->dev = dev;
+ urb->pipe = u->syncpipe;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = SYNCFRAMES;
+ urb->context = as;
+ urb->complete = usbin_sync_completed;
+ /* stride: u->syncinterval */
+ if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
+ u->flags |= FLG_SYNC0RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
+ urb = u->surb[1].urb;
+ urb->dev = dev;
+ urb->pipe = u->syncpipe;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = SYNCFRAMES;
+ urb->context = as;
+ urb->complete = usbin_sync_completed;
+ /* stride: u->syncinterval */
+ if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
+ u->flags |= FLG_SYNC1RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+ return 0;
+}
+
+static void usbout_stop(struct usb_audiodev *as)
+{
+ struct usbout *u = &as->usbout;
+ unsigned long flags;
+ unsigned int i, notkilled = 1;
+
+ spin_lock_irqsave(&as->lock, flags);
+ u->flags &= ~FLG_RUNNING;
+ i = u->flags;
+ spin_unlock_irqrestore(&as->lock, flags);
+ while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
+ set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
+ schedule_timeout(1);
+ spin_lock_irqsave(&as->lock, flags);
+ i = u->flags;
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (notkilled && signal_pending(current)) {
+ if (i & FLG_URB0RUNNING)
+ usb_kill_urb(u->durb[0].urb);
+ if (i & FLG_URB1RUNNING)
+ usb_kill_urb(u->durb[1].urb);
+ if (i & FLG_SYNC0RUNNING)
+ usb_kill_urb(u->surb[0].urb);
+ if (i & FLG_SYNC1RUNNING)
+ usb_kill_urb(u->surb[1].urb);
+ notkilled = 0;
+ }
+ }
+ set_current_state(TASK_RUNNING);
+ if (u->durb[0].urb->transfer_buffer)
+ kfree(u->durb[0].urb->transfer_buffer);
+ if (u->durb[1].urb->transfer_buffer)
+ kfree(u->durb[1].urb->transfer_buffer);
+ if (u->surb[0].urb->transfer_buffer)
+ kfree(u->surb[0].urb->transfer_buffer);
+ if (u->surb[1].urb->transfer_buffer)
+ kfree(u->surb[1].urb->transfer_buffer);
+ u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
+ u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
+}
+
+static inline void usbout_release(struct usb_audiodev *as)
+{
+ usbout_stop(as);
+}
+
+static void usbout_disc(struct usb_audiodev *as)
+{
+ struct usbout *u = &as->usbout;
+ unsigned long flags;
+
+ spin_lock_irqsave(&as->lock, flags);
+ u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
+ spin_unlock_irqrestore(&as->lock, flags);
+ usbout_stop(as);
+}
+
+static void usbout_convert(struct usbout *u, unsigned char *buffer, unsigned int samples)
+{
+ union {
+ __s16 s[64];
+ unsigned char b[0];
+ } tmp;
+ unsigned int scnt, maxs, ufmtsh, dfmtsh;
+
+ ufmtsh = AFMT_BYTESSHIFT(u->format);
+ dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
+ maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
+ while (samples > 0) {
+ scnt = samples;
+ if (scnt > maxs)
+ scnt = maxs;
+ dmabuf_copyout(&u->dma, tmp.b, scnt << dfmtsh);
+ conversion(tmp.b, u->dma.format, buffer, u->format, tmp.b, scnt);
+ buffer += scnt << ufmtsh;
+ samples -= scnt;
+ }
+}
+
+static int usbout_prepare_desc(struct usbout *u, struct urb *urb)
+{
+ unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, offs;
+ unsigned char *cp = urb->transfer_buffer;
+
+ ufmtsh = AFMT_BYTESSHIFT(u->format);
+ dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
+ for (i = offs = 0; i < DESCFRAMES; i++) {
+ urb->iso_frame_desc[i].offset = offs;
+ u->phase = (u->phase & 0x3fff) + u->freqm;
+ scnt = u->phase >> 14;
+ if (!scnt) {
+ urb->iso_frame_desc[i].length = 0;
+ continue;
+ }
+ cnt = scnt << dfmtsh;
+ if (!u->dma.mapped) {
+ if (cnt > u->dma.count) {
+ scnt = u->dma.count >> dfmtsh;
+ cnt = scnt << dfmtsh;
+ err++;
+ }
+ u->dma.count -= cnt;
+ } else
+ u->dma.count += cnt;
+ if (u->format == u->dma.format) {
+ /* we do not need format conversion */
+ dmabuf_copyout(&u->dma, cp, cnt);
+ } else {
+ /* we need sampling format conversion */
+ usbout_convert(u, cp, scnt);
+ }
+ cnt = scnt << ufmtsh;
+ urb->iso_frame_desc[i].length = cnt;
+ offs += cnt;
+ cp += cnt;
+ }
+ urb->interval = 1;
+ if (err)
+ u->dma.error++;
+ if (u->dma.mapped) {
+ if (u->dma.count >= (signed)u->dma.fragsize)
+ wake_up(&u->dma.wait);
+ } else {
+ if ((signed)u->dma.dmasize >= u->dma.count + (signed)u->dma.fragsize)
+ wake_up(&u->dma.wait);
+ }
+ return err ? -1 : 0;
+}
+
+/*
+ * return value: 0 if descriptor should be restarted, -1 otherwise
+ */
+static int usbout_retire_desc(struct usbout *u, struct urb *urb)
+{
+ unsigned int i;
+
+ for (i = 0; i < DESCFRAMES; i++) {
+ if (urb->iso_frame_desc[i].status) {
+ dprintk((KERN_DEBUG "usbout_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
+ continue;
+ }
+ }
+ return 0;
+}
+
+static void usbout_completed(struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
+ struct usbout *u = &as->usbout;
+ unsigned long flags;
+ unsigned int mask;
+ int suret = 0;
+
+#if 0
+ printk(KERN_DEBUG "usbout_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
+#endif
+ if (urb == u->durb[0].urb)
+ mask = FLG_URB0RUNNING;
+ else if (urb == u->durb[1].urb)
+ mask = FLG_URB1RUNNING;
+ else {
+ mask = 0;
+ printk(KERN_ERR "usbout_completed: panic: unknown URB\n");
+ }
+ urb->dev = as->state->usbdev;
+ spin_lock_irqsave(&as->lock, flags);
+ if (!usbout_retire_desc(u, urb) &&
+ u->flags & FLG_RUNNING &&
+ !usbout_prepare_desc(u, urb) &&
+ (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
+ u->flags |= mask;
+ } else {
+ u->flags &= ~(mask | FLG_RUNNING);
+ wake_up(&u->dma.wait);
+ dprintk((KERN_DEBUG "usbout_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+}
+
+static int usbout_sync_prepare_desc(struct usbout *u, struct urb *urb)
+{
+ unsigned int i, offs;
+
+ for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3) {
+ urb->iso_frame_desc[i].length = 3;
+ urb->iso_frame_desc[i].offset = offs;
+ }
+ urb->interval = 1;
+ return 0;
+}
+
+/*
+ * return value: 0 if descriptor should be restarted, -1 otherwise
+ */
+static int usbout_sync_retire_desc(struct usbout *u, struct urb *urb)
+{
+ unsigned char *cp = urb->transfer_buffer;
+ unsigned int f, i;
+
+ for (i = 0; i < SYNCFRAMES; i++, cp += 3) {
+ if (urb->iso_frame_desc[i].status) {
+ dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
+ continue;
+ }
+ if (urb->iso_frame_desc[i].actual_length < 3) {
+ dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u length %d\n", i, urb->iso_frame_desc[i].actual_length));
+ continue;
+ }
+ f = cp[0] | (cp[1] << 8) | (cp[2] << 16);
+ if (abs(f - u->freqn) > (u->freqn >> 3) || f > u->freqmax) {
+ printk(KERN_WARNING "usbout_sync_retire_desc: requested frequency %u (nominal %u) out of range!\n", f, u->freqn);
+ continue;
+ }
+ u->freqm = f;
+ }
+ return 0;
+}
+
+static void usbout_sync_completed(struct urb *urb, struct pt_regs *regs)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
+ struct usbout *u = &as->usbout;
+ unsigned long flags;
+ unsigned int mask;
+ int suret = 0;
+
+#if 0
+ printk(KERN_DEBUG "usbout_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
+#endif
+ if (urb == u->surb[0].urb)
+ mask = FLG_SYNC0RUNNING;
+ else if (urb == u->surb[1].urb)
+ mask = FLG_SYNC1RUNNING;
+ else {
+ mask = 0;
+ printk(KERN_ERR "usbout_sync_completed: panic: unknown URB\n");
+ }
+ urb->dev = as->state->usbdev;
+ spin_lock_irqsave(&as->lock, flags);
+ if (!usbout_sync_retire_desc(u, urb) &&
+ u->flags & FLG_RUNNING &&
+ !usbout_sync_prepare_desc(u, urb) &&
+ (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
+ u->flags |= mask;
+ } else {
+ u->flags &= ~(mask | FLG_RUNNING);
+ wake_up(&u->dma.wait);
+ dprintk((KERN_DEBUG "usbout_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+}
+
+static int usbout_start(struct usb_audiodev *as)
+{
+ struct usb_device *dev = as->state->usbdev;
+ struct usbout *u = &as->usbout;
+ struct urb *urb;
+ unsigned long flags;
+ unsigned int maxsze, bufsz;
+
+#if 0
+ printk(KERN_DEBUG "usbout_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
+ dev->devnum, u->format, u->dma.format, u->dma.srate);
+#endif
+ /* allocate USB storage if not already done */
+ spin_lock_irqsave(&as->lock, flags);
+ if (!(u->flags & FLG_CONNECTED)) {
+ spin_unlock_irqrestore(&as->lock, flags);
+ return -EIO;
+ }
+ if (!(u->flags & FLG_RUNNING)) {
+ spin_unlock_irqrestore(&as->lock, flags);
+ u->freqn = u->freqm = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
+ u->freqmax = u->freqn + (u->freqn >> 2);
+ u->phase = 0;
+ maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
+ bufsz = DESCFRAMES * maxsze;
+ if (u->durb[0].urb->transfer_buffer)
+ kfree(u->durb[0].urb->transfer_buffer);
+ u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
+ u->durb[0].urb->transfer_buffer_length = bufsz;
+ if (u->durb[1].urb->transfer_buffer)
+ kfree(u->durb[1].urb->transfer_buffer);
+ u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
+ u->durb[1].urb->transfer_buffer_length = bufsz;
+ if (u->syncpipe) {
+ if (u->surb[0].urb->transfer_buffer)
+ kfree(u->surb[0].urb->transfer_buffer);
+ u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
+ u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
+ if (u->surb[1].urb->transfer_buffer)
+ kfree(u->surb[1].urb->transfer_buffer);
+ u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
+ u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
+ }
+ if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
+ (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
+ printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
+ return 0;
+ }
+ spin_lock_irqsave(&as->lock, flags);
+ }
+ if (u->dma.count <= 0 && !u->dma.mapped) {
+ spin_unlock_irqrestore(&as->lock, flags);
+ return 0;
+ }
+ u->flags |= FLG_RUNNING;
+ if (!(u->flags & FLG_URB0RUNNING)) {
+ urb = u->durb[0].urb;
+ urb->dev = dev;
+ urb->pipe = u->datapipe;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = DESCFRAMES;
+ urb->context = as;
+ urb->complete = usbout_completed;
+ if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
+ u->flags |= FLG_URB0RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
+ urb = u->durb[1].urb;
+ urb->dev = dev;
+ urb->pipe = u->datapipe;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = DESCFRAMES;
+ urb->context = as;
+ urb->complete = usbout_completed;
+ if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
+ u->flags |= FLG_URB1RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ if (u->syncpipe) {
+ if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
+ urb = u->surb[0].urb;
+ urb->dev = dev;
+ urb->pipe = u->syncpipe;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = SYNCFRAMES;
+ urb->context = as;
+ urb->complete = usbout_sync_completed;
+ /* stride: u->syncinterval */
+ if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
+ u->flags |= FLG_SYNC0RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
+ urb = u->surb[1].urb;
+ urb->dev = dev;
+ urb->pipe = u->syncpipe;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->number_of_packets = SYNCFRAMES;
+ urb->context = as;
+ urb->complete = usbout_sync_completed;
+ /* stride: u->syncinterval */
+ if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
+ u->flags |= FLG_SYNC1RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+ return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static unsigned int format_goodness(struct audioformat *afp, unsigned int fmt, unsigned int srate)
+{
+ unsigned int g = 0;
+
+ if (srate < afp->sratelo)
+ g += afp->sratelo - srate;
+ if (srate > afp->sratehi)
+ g += srate - afp->sratehi;
+ if (AFMT_ISSTEREO(afp->format) && !AFMT_ISSTEREO(fmt))
+ g += 0x100000;
+ if (!AFMT_ISSTEREO(afp->format) && AFMT_ISSTEREO(fmt))
+ g += 0x400000;
+ if (AFMT_IS16BIT(afp->format) && !AFMT_IS16BIT(fmt))
+ g += 0x100000;
+ if (!AFMT_IS16BIT(afp->format) && AFMT_IS16BIT(fmt))
+ g += 0x400000;
+ return g;
+}
+
+static int find_format(struct audioformat *afp, unsigned int nr, unsigned int fmt, unsigned int srate)
+{
+ unsigned int i, g, gb = ~0;
+ int j = -1; /* default to failure */
+
+ /* find "best" format (according to format_goodness) */
+ for (i = 0; i < nr; i++) {
+ g = format_goodness(&afp[i], fmt, srate);
+ if (g >= gb)
+ continue;
+ j = i;
+ gb = g;
+ }
+ return j;
+}
+
+static int set_format_in(struct usb_audiodev *as)
+{
+ struct usb_device *dev = as->state->usbdev;
+ struct usb_host_interface *alts;
+ struct usb_interface *iface;
+ struct usbin *u = &as->usbin;
+ struct dmabuf *d = &u->dma;
+ struct audioformat *fmt;
+ unsigned int ep;
+ unsigned char data[3];
+ int fmtnr, ret;
+
+ iface = usb_ifnum_to_if(dev, u->interface);
+ if (!iface)
+ return 0;
+
+ fmtnr = find_format(as->fmtin, as->numfmtin, d->format, d->srate);
+ if (fmtnr < 0) {
+ printk(KERN_ERR "usbaudio: set_format_in(): failed to find desired format/speed combination.\n");
+ return -1;
+ }
+
+ fmt = as->fmtin + fmtnr;
+ alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
+ u->format = fmt->format;
+ u->datapipe = usb_rcvisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
+ u->syncpipe = u->syncinterval = 0;
+ if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x08) {
+ if (alts->desc.bNumEndpoints < 2 ||
+ alts->endpoint[1].desc.bmAttributes != 0x01 ||
+ alts->endpoint[1].desc.bSynchAddress != 0 ||
+ alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress & 0x7f)) {
+ printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims adaptive in "
+ "but has invalid synch pipe; treating as asynchronous in\n",
+ dev->devnum, u->interface, fmt->altsetting);
+ } else {
+ u->syncpipe = usb_sndisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
+ u->syncinterval = alts->endpoint[1].desc.bRefresh;
+ }
+ }
+ if (d->srate < fmt->sratelo)
+ d->srate = fmt->sratelo;
+ if (d->srate > fmt->sratehi)
+ d->srate = fmt->sratehi;
+ dprintk((KERN_DEBUG "usbaudio: set_format_in: usb_set_interface %u %u\n",
+ u->interface, fmt->altsetting));
+ if (usb_set_interface(dev, alts->desc.bInterfaceNumber, fmt->altsetting) < 0) {
+ printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
+ dev->devnum, u->interface, fmt->altsetting);
+ return -1;
+ }
+ if (fmt->sratelo == fmt->sratehi)
+ return 0;
+ ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
+ /* if endpoint has pitch control, enable it */
+ if (fmt->attributes & 0x02) {
+ data[0] = 1;
+ if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
+ PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
+ printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
+ ret, dev->devnum, u->interface, ep, d->srate);
+ return -1;
+ }
+ }
+ /* if endpoint has sampling rate control, set it */
+ if (fmt->attributes & 0x01) {
+ data[0] = d->srate;
+ data[1] = d->srate >> 8;
+ data[2] = d->srate >> 16;
+ if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
+ SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
+ printk(KERN_ERR "usbaudio: failure (error %d) to set input sampling frequency device %d interface %u endpoint 0x%x to %u\n",
+ ret, dev->devnum, u->interface, ep, d->srate);
+ return -1;
+ }
+ if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
+ SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
+ printk(KERN_ERR "usbaudio: failure (error %d) to get input sampling frequency device %d interface %u endpoint 0x%x\n",
+ ret, dev->devnum, u->interface, ep);
+ return -1;
+ }
+ dprintk((KERN_DEBUG "usbaudio: set_format_in: device %d interface %d altsetting %d srate req: %u real %u\n",
+ dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
+ d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
+ }
+ dprintk((KERN_DEBUG "usbaudio: set_format_in: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
+ return 0;
+}
+
+static int set_format_out(struct usb_audiodev *as)
+{
+ struct usb_device *dev = as->state->usbdev;
+ struct usb_host_interface *alts;
+ struct usb_interface *iface;
+ struct usbout *u = &as->usbout;
+ struct dmabuf *d = &u->dma;
+ struct audioformat *fmt;
+ unsigned int ep;
+ unsigned char data[3];
+ int fmtnr, ret;
+
+ iface = usb_ifnum_to_if(dev, u->interface);
+ if (!iface)
+ return 0;
+
+ fmtnr = find_format(as->fmtout, as->numfmtout, d->format, d->srate);
+ if (fmtnr < 0) {
+ printk(KERN_ERR "usbaudio: set_format_out(): failed to find desired format/speed combination.\n");
+ return -1;
+ }
+
+ fmt = as->fmtout + fmtnr;
+ u->format = fmt->format;
+ alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
+ u->datapipe = usb_sndisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
+ u->syncpipe = u->syncinterval = 0;
+ if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x04) {
+#if 0
+ printk(KERN_DEBUG "bNumEndpoints 0x%02x endpoint[1].bmAttributes 0x%02x\n"
+ KERN_DEBUG "endpoint[1].bSynchAddress 0x%02x endpoint[1].bEndpointAddress 0x%02x\n"
+ KERN_DEBUG "endpoint[0].bSynchAddress 0x%02x\n", alts->bNumEndpoints,
+ alts->endpoint[1].bmAttributes, alts->endpoint[1].bSynchAddress,
+ alts->endpoint[1].bEndpointAddress, alts->endpoint[0].bSynchAddress);
+#endif
+ if (alts->desc.bNumEndpoints < 2 ||
+ alts->endpoint[1].desc.bmAttributes != 0x01 ||
+ alts->endpoint[1].desc.bSynchAddress != 0 ||
+ alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress | 0x80)) {
+ printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims asynch out "
+ "but has invalid synch pipe; treating as adaptive out\n",
+ dev->devnum, u->interface, fmt->altsetting);
+ } else {
+ u->syncpipe = usb_rcvisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
+ u->syncinterval = alts->endpoint[1].desc.bRefresh;
+ }
+ }
+ if (d->srate < fmt->sratelo)
+ d->srate = fmt->sratelo;
+ if (d->srate > fmt->sratehi)
+ d->srate = fmt->sratehi;
+ dprintk((KERN_DEBUG "usbaudio: set_format_out: usb_set_interface %u %u\n",
+ u->interface, fmt->altsetting));
+ if (usb_set_interface(dev, u->interface, fmt->altsetting) < 0) {
+ printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
+ dev->devnum, u->interface, fmt->altsetting);
+ return -1;
+ }
+ if (fmt->sratelo == fmt->sratehi)
+ return 0;
+ ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
+ /* if endpoint has pitch control, enable it */
+ if (fmt->attributes & 0x02) {
+ data[0] = 1;
+ if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
+ PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
+ printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
+ ret, dev->devnum, u->interface, ep, d->srate);
+ return -1;
+ }
+ }
+ /* if endpoint has sampling rate control, set it */
+ if (fmt->attributes & 0x01) {
+ data[0] = d->srate;
+ data[1] = d->srate >> 8;
+ data[2] = d->srate >> 16;
+ if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
+ SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
+ printk(KERN_ERR "usbaudio: failure (error %d) to set output sampling frequency device %d interface %u endpoint 0x%x to %u\n",
+ ret, dev->devnum, u->interface, ep, d->srate);
+ return -1;
+ }
+ if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
+ SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
+ printk(KERN_ERR "usbaudio: failure (error %d) to get output sampling frequency device %d interface %u endpoint 0x%x\n",
+ ret, dev->devnum, u->interface, ep);
+ return -1;
+ }
+ dprintk((KERN_DEBUG "usbaudio: set_format_out: device %d interface %d altsetting %d srate req: %u real %u\n",
+ dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
+ d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
+ }
+ dprintk((KERN_DEBUG "usbaudio: set_format_out: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
+ return 0;
+}
+
+static int set_format(struct usb_audiodev *s, unsigned int fmode, unsigned int fmt, unsigned int srate)
+{
+ int ret1 = 0, ret2 = 0;
+
+ if (!(fmode & (FMODE_READ|FMODE_WRITE)))
+ return -EINVAL;
+ if (fmode & FMODE_READ) {
+ usbin_stop(s);
+ s->usbin.dma.ready = 0;
+ if (fmt == AFMT_QUERY)
+ fmt = s->usbin.dma.format;
+ else
+ s->usbin.dma.format = fmt;
+ if (!srate)
+ srate = s->usbin.dma.srate;
+ else
+ s->usbin.dma.srate = srate;
+ }
+ if (fmode & FMODE_WRITE) {
+ usbout_stop(s);
+ s->usbout.dma.ready = 0;
+ if (fmt == AFMT_QUERY)
+ fmt = s->usbout.dma.format;
+ else
+ s->usbout.dma.format = fmt;
+ if (!srate)
+ srate = s->usbout.dma.srate;
+ else
+ s->usbout.dma.srate = srate;
+ }
+ if (fmode & FMODE_READ)
+ ret1 = set_format_in(s);
+ if (fmode & FMODE_WRITE)
+ ret2 = set_format_out(s);
+ return ret1 ? ret1 : ret2;
+}
+
+/* --------------------------------------------------------------------- */
+
+static int wrmixer(struct usb_mixerdev *ms, unsigned mixch, unsigned value)
+{
+ struct usb_device *dev = ms->state->usbdev;
+ unsigned char data[2];
+ struct mixerchannel *ch;
+ int v1, v2, v3;
+
+ if (mixch >= ms->numch)
+ return -1;
+ ch = &ms->ch[mixch];
+ v3 = ch->maxval - ch->minval;
+ v1 = value & 0xff;
+ v2 = (value >> 8) & 0xff;
+ if (v1 > 100)
+ v1 = 100;
+ if (v2 > 100)
+ v2 = 100;
+ if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
+ v2 = v1;
+ ch->value = v1 | (v2 << 8);
+ v1 = (v1 * v3) / 100 + ch->minval;
+ v2 = (v2 * v3) / 100 + ch->minval;
+ switch (ch->selector) {
+ case 0: /* mixer unit request */
+ data[0] = v1;
+ data[1] = v1 >> 8;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ (ch->chnum << 8) | 1, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
+ goto err;
+ if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
+ return 0;
+ data[0] = v2;
+ data[1] = v2 >> 8;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
+ ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
+ goto err;
+ return 0;
+
+ /* various feature unit controls */
+ case VOLUME_CONTROL:
+ data[0] = v1;
+ data[1] = v1 >> 8;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
+ goto err;
+ if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
+ return 0;
+ data[0] = v2;
+ data[1] = v2 >> 8;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
+ goto err;
+ return 0;
+
+ case BASS_CONTROL:
+ case MID_CONTROL:
+ case TREBLE_CONTROL:
+ data[0] = v1 >> 8;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 1, 1000) < 0)
+ goto err;
+ if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
+ return 0;
+ data[0] = v2 >> 8;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 1, 1000) < 0)
+ goto err;
+ return 0;
+
+ default:
+ return -1;
+ }
+ return 0;
+
+ err:
+ printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
+ dev->devnum, ms->iface, ch->unitid, ch->chnum, ch->selector);
+ return -1;
+}
+
+static int get_rec_src(struct usb_mixerdev *ms)
+{
+ struct usb_device *dev = ms->state->usbdev;
+ unsigned int mask = 0, retmask = 0;
+ unsigned int i, j;
+ unsigned char buf;
+ int err = 0;
+
+ for (i = 0; i < ms->numch; i++) {
+ if (!ms->ch[i].slctunitid || (mask & (1 << i)))
+ continue;
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ 0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) {
+ err = -EIO;
+ printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
+ dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
+ continue;
+ }
+ for (j = i; j < ms->numch; j++) {
+ if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
+ continue;
+ mask |= 1 << j;
+ if (buf == (ms->ch[j].slctunitid >> 8))
+ retmask |= 1 << ms->ch[j].osschannel;
+ }
+ }
+ if (err)
+ return -EIO;
+ return retmask;
+}
+
+static int set_rec_src(struct usb_mixerdev *ms, int srcmask)
+{
+ struct usb_device *dev = ms->state->usbdev;
+ unsigned int mask = 0, smask, bmask;
+ unsigned int i, j;
+ unsigned char buf;
+ int err = 0;
+
+ for (i = 0; i < ms->numch; i++) {
+ if (!ms->ch[i].slctunitid || (mask & (1 << i)))
+ continue;
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ 0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) {
+ err = -EIO;
+ printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
+ dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
+ continue;
+ }
+ /* first generate smask */
+ smask = bmask = 0;
+ for (j = i; j < ms->numch; j++) {
+ if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
+ continue;
+ smask |= 1 << ms->ch[j].osschannel;
+ if (buf == (ms->ch[j].slctunitid >> 8))
+ bmask |= 1 << ms->ch[j].osschannel;
+ mask |= 1 << j;
+ }
+ /* check for multiple set sources */
+ j = hweight32(srcmask & smask);
+ if (j == 0)
+ continue;
+ if (j > 1)
+ srcmask &= ~bmask;
+ for (j = i; j < ms->numch; j++) {
+ if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
+ continue;
+ if (!(srcmask & (1 << ms->ch[j].osschannel)))
+ continue;
+ buf = ms->ch[j].slctunitid >> 8;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ 0, ms->iface | (ms->ch[j].slctunitid << 8), &buf, 1, 1000) < 0) {
+ err = -EIO;
+ printk(KERN_ERR "usbaudio: selector write request device %u if %u unit %u failed\n",
+ dev->devnum, ms->iface, ms->ch[j].slctunitid & 0xff);
+ continue;
+ }
+ }
+ }
+ return err ? -EIO : 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * should be called with open_sem hold, so that no new processes
+ * look at the audio device to be destroyed
+ */
+
+static void release(struct usb_audio_state *s)
+{
+ struct usb_audiodev *as;
+ struct usb_mixerdev *ms;
+
+ s->count--;
+ if (s->count) {
+ up(&open_sem);
+ return;
+ }
+ up(&open_sem);
+ wake_up(&open_wait);
+ while (!list_empty(&s->audiolist)) {
+ as = list_entry(s->audiolist.next, struct usb_audiodev, list);
+ list_del(&as->list);
+ usbin_release(as);
+ usbout_release(as);
+ dmabuf_release(&as->usbin.dma);
+ dmabuf_release(&as->usbout.dma);
+ usb_free_urb(as->usbin.durb[0].urb);
+ usb_free_urb(as->usbin.durb[1].urb);
+ usb_free_urb(as->usbin.surb[0].urb);
+ usb_free_urb(as->usbin.surb[1].urb);
+ usb_free_urb(as->usbout.durb[0].urb);
+ usb_free_urb(as->usbout.durb[1].urb);
+ usb_free_urb(as->usbout.surb[0].urb);
+ usb_free_urb(as->usbout.surb[1].urb);
+ kfree(as);
+ }
+ while (!list_empty(&s->mixerlist)) {
+ ms = list_entry(s->mixerlist.next, struct usb_mixerdev, list);
+ list_del(&ms->list);
+ kfree(ms);
+ }
+ kfree(s);
+}
+
+static inline int prog_dmabuf_in(struct usb_audiodev *as)
+{
+ usbin_stop(as);
+ return dmabuf_init(&as->usbin.dma);
+}
+
+static inline int prog_dmabuf_out(struct usb_audiodev *as)
+{
+ usbout_stop(as);
+ return dmabuf_init(&as->usbout.dma);
+}
+
+/* --------------------------------------------------------------------- */
+
+static int usb_audio_open_mixdev(struct inode *inode, struct file *file)
+{
+ unsigned int minor = iminor(inode);
+ struct usb_mixerdev *ms;
+ struct usb_audio_state *s;
+
+ down(&open_sem);
+ list_for_each_entry(s, &audiodevs, audiodev) {
+ list_for_each_entry(ms, &s->mixerlist, list) {
+ if (ms->dev_mixer == minor)
+ goto mixer_found;
+ }
+ }
+ up(&open_sem);
+ return -ENODEV;
+
+ mixer_found:
+ if (!s->usbdev) {
+ up(&open_sem);
+ return -EIO;
+ }
+ file->private_data = ms;
+ s->count++;
+
+ up(&open_sem);
+ return nonseekable_open(inode, file);
+}
+
+static int usb_audio_release_mixdev(struct inode *inode, struct file *file)
+{
+ struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
+ struct usb_audio_state *s;
+
+ lock_kernel();
+ s = ms->state;
+ down(&open_sem);
+ release(s);
+ unlock_kernel();
+ return 0;
+}
+
+static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
+ int i, j, val;
+ int __user *user_arg = (int __user *)arg;
+
+ if (!ms->state->usbdev)
+ return -ENODEV;
+
+ if (cmd == SOUND_MIXER_INFO) {
+ mixer_info info;
+
+ memset(&info, 0, sizeof(info));
+ strncpy(info.id, "USB_AUDIO", sizeof(info.id));
+ strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
+ info.modify_counter = ms->modcnt;
+ if (copy_to_user((void __user *)arg, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == SOUND_OLD_MIXER_INFO) {
+ _old_mixer_info info;
+
+ memset(&info, 0, sizeof(info));
+ strncpy(info.id, "USB_AUDIO", sizeof(info.id));
+ strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
+ if (copy_to_user((void __user *)arg, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == OSS_GETVERSION)
+ return put_user(SOUND_VERSION, user_arg);
+ if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
+ return -EINVAL;
+ if (_IOC_DIR(cmd) == _IOC_READ) {
+ switch (_IOC_NR(cmd)) {
+ case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
+ val = get_rec_src(ms);
+ if (val < 0)
+ return val;
+ return put_user(val, user_arg);
+
+ case SOUND_MIXER_DEVMASK: /* Arg contains a bit for each supported device */
+ for (val = i = 0; i < ms->numch; i++)
+ val |= 1 << ms->ch[i].osschannel;
+ return put_user(val, user_arg);
+
+ case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
+ for (val = i = 0; i < ms->numch; i++)
+ if (ms->ch[i].slctunitid)
+ val |= 1 << ms->ch[i].osschannel;
+ return put_user(val, user_arg);
+
+ case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
+ for (val = i = 0; i < ms->numch; i++)
+ if (ms->ch[i].flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))
+ val |= 1 << ms->ch[i].osschannel;
+ return put_user(val, user_arg);
+
+ case SOUND_MIXER_CAPS:
+ return put_user(SOUND_CAP_EXCL_INPUT, user_arg);
+
+ default:
+ i = _IOC_NR(cmd);
+ if (i >= SOUND_MIXER_NRDEVICES)
+ return -EINVAL;
+ for (j = 0; j < ms->numch; j++) {
+ if (ms->ch[j].osschannel == i) {
+ return put_user(ms->ch[j].value, user_arg);
+ }
+ }
+ return -EINVAL;
+ }
+ }
+ if (_IOC_DIR(cmd) != (_IOC_READ|_IOC_WRITE))
+ return -EINVAL;
+ ms->modcnt++;
+ switch (_IOC_NR(cmd)) {
+ case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ return set_rec_src(ms, val);
+
+ default:
+ i = _IOC_NR(cmd);
+ if (i >= SOUND_MIXER_NRDEVICES)
+ return -EINVAL;
+ for (j = 0; j < ms->numch && ms->ch[j].osschannel != i; j++);
+ if (j >= ms->numch)
+ return -EINVAL;
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ if (wrmixer(ms, j, val))
+ return -EIO;
+ return put_user(ms->ch[j].value, user_arg);
+ }
+}
+
+static /*const*/ struct file_operations usb_mixer_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .ioctl = usb_audio_ioctl_mixdev,
+ .open = usb_audio_open_mixdev,
+ .release = usb_audio_release_mixdev,
+};
+
+/* --------------------------------------------------------------------- */
+
+static int drain_out(struct usb_audiodev *as, int nonblock)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ unsigned long flags;
+ int count, tmo;
+
+ if (as->usbout.dma.mapped || !as->usbout.dma.ready)
+ return 0;
+ usbout_start(as);
+ add_wait_queue(&as->usbout.dma.wait, &wait);
+ for (;;) {
+ __set_current_state(TASK_INTERRUPTIBLE);
+ spin_lock_irqsave(&as->lock, flags);
+ count = as->usbout.dma.count;
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (count <= 0)
+ break;
+ if (signal_pending(current))
+ break;
+ if (nonblock) {
+ remove_wait_queue(&as->usbout.dma.wait, &wait);
+ set_current_state(TASK_RUNNING);
+ return -EBUSY;
+ }
+ tmo = 3 * HZ * count / as->usbout.dma.srate;
+ tmo >>= AFMT_BYTESSHIFT(as->usbout.dma.format);
+ if (!schedule_timeout(tmo + 1)) {
+ printk(KERN_DEBUG "usbaudio: dma timed out??\n");
+ break;
+ }
+ }
+ remove_wait_queue(&as->usbout.dma.wait, &wait);
+ set_current_state(TASK_RUNNING);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ return 0;
+}
+
+/* --------------------------------------------------------------------- */
+
+static ssize_t usb_audio_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
+ DECLARE_WAITQUEUE(wait, current);
+ ssize_t ret = 0;
+ unsigned long flags;
+ unsigned int ptr;
+ int cnt, err;
+
+ if (as->usbin.dma.mapped)
+ return -ENXIO;
+ if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
+ return ret;
+ if (!access_ok(VERIFY_WRITE, buffer, count))
+ return -EFAULT;
+ add_wait_queue(&as->usbin.dma.wait, &wait);
+ while (count > 0) {
+ spin_lock_irqsave(&as->lock, flags);
+ ptr = as->usbin.dma.rdptr;
+ cnt = as->usbin.dma.count;
+ /* set task state early to avoid wakeup races */
+ if (cnt <= 0)
+ __set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (cnt > count)
+ cnt = count;
+ if (cnt <= 0) {
+ if (usbin_start(as)) {
+ if (!ret)
+ ret = -ENODEV;
+ break;
+ }
+ if (file->f_flags & O_NONBLOCK) {
+ if (!ret)
+ ret = -EAGAIN;
+ break;
+ }
+ schedule();
+ if (signal_pending(current)) {
+ if (!ret)
+ ret = -ERESTARTSYS;
+ break;
+ }
+ continue;
+ }
+ if ((err = dmabuf_copyout_user(&as->usbin.dma, ptr, buffer, cnt))) {
+ if (!ret)
+ ret = err;
+ break;
+ }
+ ptr += cnt;
+ if (ptr >= as->usbin.dma.dmasize)
+ ptr -= as->usbin.dma.dmasize;
+ spin_lock_irqsave(&as->lock, flags);
+ as->usbin.dma.rdptr = ptr;
+ as->usbin.dma.count -= cnt;
+ spin_unlock_irqrestore(&as->lock, flags);
+ count -= cnt;
+ buffer += cnt;
+ ret += cnt;
+ }
+ __set_current_state(TASK_RUNNING);
+ remove_wait_queue(&as->usbin.dma.wait, &wait);
+ return ret;
+}
+
+static ssize_t usb_audio_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
+ DECLARE_WAITQUEUE(wait, current);
+ ssize_t ret = 0;
+ unsigned long flags;
+ unsigned int ptr;
+ unsigned int start_thr;
+ int cnt, err;
+
+ if (as->usbout.dma.mapped)
+ return -ENXIO;
+ if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
+ return ret;
+ if (!access_ok(VERIFY_READ, buffer, count))
+ return -EFAULT;
+ start_thr = (as->usbout.dma.srate << AFMT_BYTESSHIFT(as->usbout.dma.format)) / (1000 / (3 * DESCFRAMES));
+ add_wait_queue(&as->usbout.dma.wait, &wait);
+ while (count > 0) {
+#if 0
+ printk(KERN_DEBUG "usb_audio_write: count %u dma: count %u rdptr %u wrptr %u dmasize %u fragsize %u flags 0x%02x taskst 0x%lx\n",
+ count, as->usbout.dma.count, as->usbout.dma.rdptr, as->usbout.dma.wrptr, as->usbout.dma.dmasize, as->usbout.dma.fragsize,
+ as->usbout.flags, current->state);
+#endif
+ spin_lock_irqsave(&as->lock, flags);
+ if (as->usbout.dma.count < 0) {
+ as->usbout.dma.count = 0;
+ as->usbout.dma.rdptr = as->usbout.dma.wrptr;
+ }
+ ptr = as->usbout.dma.wrptr;
+ cnt = as->usbout.dma.dmasize - as->usbout.dma.count;
+ /* set task state early to avoid wakeup races */
+ if (cnt <= 0)
+ __set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (cnt > count)
+ cnt = count;
+ if (cnt <= 0) {
+ if (usbout_start(as)) {
+ if (!ret)
+ ret = -ENODEV;
+ break;
+ }
+ if (file->f_flags & O_NONBLOCK) {
+ if (!ret)
+ ret = -EAGAIN;
+ break;
+ }
+ schedule();
+ if (signal_pending(current)) {
+ if (!ret)
+ ret = -ERESTARTSYS;
+ break;
+ }
+ continue;
+ }
+ if ((err = dmabuf_copyin_user(&as->usbout.dma, ptr, buffer, cnt))) {
+ if (!ret)
+ ret = err;
+ break;
+ }
+ ptr += cnt;
+ if (ptr >= as->usbout.dma.dmasize)
+ ptr -= as->usbout.dma.dmasize;
+ spin_lock_irqsave(&as->lock, flags);
+ as->usbout.dma.wrptr = ptr;
+ as->usbout.dma.count += cnt;
+ spin_unlock_irqrestore(&as->lock, flags);
+ count -= cnt;
+ buffer += cnt;
+ ret += cnt;
+ if (as->usbout.dma.count >= start_thr && usbout_start(as)) {
+ if (!ret)
+ ret = -ENODEV;
+ break;
+ }
+ }
+ __set_current_state(TASK_RUNNING);
+ remove_wait_queue(&as->usbout.dma.wait, &wait);
+ return ret;
+}
+
+/* Called without the kernel lock - fine */
+static unsigned int usb_audio_poll(struct file *file, struct poll_table_struct *wait)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
+ unsigned long flags;
+ unsigned int mask = 0;
+
+ if (file->f_mode & FMODE_WRITE) {
+ if (!as->usbout.dma.ready)
+ prog_dmabuf_out(as);
+ poll_wait(file, &as->usbout.dma.wait, wait);
+ }
+ if (file->f_mode & FMODE_READ) {
+ if (!as->usbin.dma.ready)
+ prog_dmabuf_in(as);
+ poll_wait(file, &as->usbin.dma.wait, wait);
+ }
+ spin_lock_irqsave(&as->lock, flags);
+ if (file->f_mode & FMODE_READ) {
+ if (as->usbin.dma.count >= (signed)as->usbin.dma.fragsize)
+ mask |= POLLIN | POLLRDNORM;
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ if (as->usbout.dma.mapped) {
+ if (as->usbout.dma.count >= (signed)as->usbout.dma.fragsize)
+ mask |= POLLOUT | POLLWRNORM;
+ } else {
+ if ((signed)as->usbout.dma.dmasize >= as->usbout.dma.count + (signed)as->usbout.dma.fragsize)
+ mask |= POLLOUT | POLLWRNORM;
+ }
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+ return mask;
+}
+
+static int usb_audio_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
+ struct dmabuf *db;
+ int ret = -EINVAL;
+
+ lock_kernel();
+ if (vma->vm_flags & VM_WRITE) {
+ if ((ret = prog_dmabuf_out(as)) != 0)
+ goto out;
+ db = &as->usbout.dma;
+ } else if (vma->vm_flags & VM_READ) {
+ if ((ret = prog_dmabuf_in(as)) != 0)
+ goto out;
+ db = &as->usbin.dma;
+ } else
+ goto out;
+
+ ret = -EINVAL;
+ if (vma->vm_pgoff != 0)
+ goto out;
+
+ ret = dmabuf_mmap(vma, db, vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_page_prot);
+out:
+ unlock_kernel();
+ return ret;
+}
+
+static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
+ struct usb_audio_state *s = as->state;
+ int __user *user_arg = (int __user *)arg;
+ unsigned long flags;
+ audio_buf_info abinfo;
+ count_info cinfo;
+ int val = 0;
+ int val2, mapped, ret;
+
+ if (!s->usbdev)
+ return -EIO;
+ mapped = ((file->f_mode & FMODE_WRITE) && as->usbout.dma.mapped) ||
+ ((file->f_mode & FMODE_READ) && as->usbin.dma.mapped);
+#if 0
+ if (arg)
+ get_user(val, (int *)arg);
+ printk(KERN_DEBUG "usbaudio: usb_audio_ioctl cmd=%x arg=%lx *arg=%d\n", cmd, arg, val)
+#endif
+ switch (cmd) {
+ case OSS_GETVERSION:
+ return put_user(SOUND_VERSION, user_arg);
+
+ case SNDCTL_DSP_SYNC:
+ if (file->f_mode & FMODE_WRITE)
+ return drain_out(as, 0/*file->f_flags & O_NONBLOCK*/);
+ return 0;
+
+ case SNDCTL_DSP_SETDUPLEX:
+ return 0;
+
+ case SNDCTL_DSP_GETCAPS:
+ return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER |
+ DSP_CAP_MMAP | DSP_CAP_BATCH, user_arg);
+
+ case SNDCTL_DSP_RESET:
+ if (file->f_mode & FMODE_WRITE) {
+ usbout_stop(as);
+ as->usbout.dma.rdptr = as->usbout.dma.wrptr = as->usbout.dma.count = as->usbout.dma.total_bytes = 0;
+ }
+ if (file->f_mode & FMODE_READ) {
+ usbin_stop(as);
+ as->usbin.dma.rdptr = as->usbin.dma.wrptr = as->usbin.dma.count = as->usbin.dma.total_bytes = 0;
+ }
+ return 0;
+
+ case SNDCTL_DSP_SPEED:
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ if (val >= 0) {
+ if (val < 4000)
+ val = 4000;
+ if (val > 100000)
+ val = 100000;
+ if (set_format(as, file->f_mode, AFMT_QUERY, val))
+ return -EIO;
+ }
+ return put_user((file->f_mode & FMODE_READ) ?
+ as->usbin.dma.srate : as->usbout.dma.srate,
+ user_arg);
+
+ case SNDCTL_DSP_STEREO:
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
+ if (val)
+ val2 |= AFMT_STEREO;
+ else
+ val2 &= ~AFMT_STEREO;
+ if (set_format(as, file->f_mode, val2, 0))
+ return -EIO;
+ return 0;
+
+ case SNDCTL_DSP_CHANNELS:
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ if (val != 0) {
+ val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
+ if (val == 1)
+ val2 &= ~AFMT_STEREO;
+ else
+ val2 |= AFMT_STEREO;
+ if (set_format(as, file->f_mode, val2, 0))
+ return -EIO;
+ }
+ val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
+ return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);
+
+ case SNDCTL_DSP_GETFMTS: /* Returns a mask */
+ return put_user(AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
+ AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE, user_arg);
+
+ case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ if (val != AFMT_QUERY) {
+ if (hweight32(val) != 1)
+ return -EINVAL;
+ if (!(val & (AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
+ AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE)))
+ return -EINVAL;
+ val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
+ val |= val2 & AFMT_STEREO;
+ if (set_format(as, file->f_mode, val, 0))
+ return -EIO;
+ }
+ val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
+ return put_user(val2 & ~AFMT_STEREO, user_arg);
+
+ case SNDCTL_DSP_POST:
+ return 0;
+
+ case SNDCTL_DSP_GETTRIGGER:
+ val = 0;
+ if (file->f_mode & FMODE_READ && as->usbin.flags & FLG_RUNNING)
+ val |= PCM_ENABLE_INPUT;
+ if (file->f_mode & FMODE_WRITE && as->usbout.flags & FLG_RUNNING)
+ val |= PCM_ENABLE_OUTPUT;
+ return put_user(val, user_arg);
+
+ case SNDCTL_DSP_SETTRIGGER:
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ if (file->f_mode & FMODE_READ) {
+ if (val & PCM_ENABLE_INPUT) {
+ if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
+ return ret;
+ if (usbin_start(as))
+ return -ENODEV;
+ } else
+ usbin_stop(as);
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ if (val & PCM_ENABLE_OUTPUT) {
+ if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
+ return ret;
+ if (usbout_start(as))
+ return -ENODEV;
+ } else
+ usbout_stop(as);
+ }
+ return 0;
+
+ case SNDCTL_DSP_GETOSPACE:
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EINVAL;
+ if (!(as->usbout.flags & FLG_RUNNING) && (val = prog_dmabuf_out(as)) != 0)
+ return val;
+ spin_lock_irqsave(&as->lock, flags);
+ abinfo.fragsize = as->usbout.dma.fragsize;
+ abinfo.bytes = as->usbout.dma.dmasize - as->usbout.dma.count;
+ abinfo.fragstotal = as->usbout.dma.numfrag;
+ abinfo.fragments = abinfo.bytes >> as->usbout.dma.fragshift;
+ spin_unlock_irqrestore(&as->lock, flags);
+ return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+
+ case SNDCTL_DSP_GETISPACE:
+ if (!(file->f_mode & FMODE_READ))
+ return -EINVAL;
+ if (!(as->usbin.flags & FLG_RUNNING) && (val = prog_dmabuf_in(as)) != 0)
+ return val;
+ spin_lock_irqsave(&as->lock, flags);
+ abinfo.fragsize = as->usbin.dma.fragsize;
+ abinfo.bytes = as->usbin.dma.count;
+ abinfo.fragstotal = as->usbin.dma.numfrag;
+ abinfo.fragments = abinfo.bytes >> as->usbin.dma.fragshift;
+ spin_unlock_irqrestore(&as->lock, flags);
+ return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+
+ case SNDCTL_DSP_NONBLOCK:
+ file->f_flags |= O_NONBLOCK;
+ return 0;
+
+ case SNDCTL_DSP_GETODELAY:
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EINVAL;
+ spin_lock_irqsave(&as->lock, flags);
+ val = as->usbout.dma.count;
+ spin_unlock_irqrestore(&as->lock, flags);
+ return put_user(val, user_arg);
+
+ case SNDCTL_DSP_GETIPTR:
+ if (!(file->f_mode & FMODE_READ))
+ return -EINVAL;
+ spin_lock_irqsave(&as->lock, flags);
+ cinfo.bytes = as->usbin.dma.total_bytes;
+ cinfo.blocks = as->usbin.dma.count >> as->usbin.dma.fragshift;
+ cinfo.ptr = as->usbin.dma.wrptr;
+ if (as->usbin.dma.mapped)
+ as->usbin.dma.count &= as->usbin.dma.fragsize-1;
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
+ return -EFAULT;
+ return 0;
+
+ case SNDCTL_DSP_GETOPTR:
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EINVAL;
+ spin_lock_irqsave(&as->lock, flags);
+ cinfo.bytes = as->usbout.dma.total_bytes;
+ cinfo.blocks = as->usbout.dma.count >> as->usbout.dma.fragshift;
+ cinfo.ptr = as->usbout.dma.rdptr;
+ if (as->usbout.dma.mapped)
+ as->usbout.dma.count &= as->usbout.dma.fragsize-1;
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
+ return -EFAULT;
+ return 0;
+
+ case SNDCTL_DSP_GETBLKSIZE:
+ if (file->f_mode & FMODE_WRITE) {
+ if ((val = prog_dmabuf_out(as)))
+ return val;
+ return put_user(as->usbout.dma.fragsize, user_arg);
+ }
+ if ((val = prog_dmabuf_in(as)))
+ return val;
+ return put_user(as->usbin.dma.fragsize, user_arg);
+
+ case SNDCTL_DSP_SETFRAGMENT:
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ if (file->f_mode & FMODE_READ) {
+ as->usbin.dma.ossfragshift = val & 0xffff;
+ as->usbin.dma.ossmaxfrags = (val >> 16) & 0xffff;
+ if (as->usbin.dma.ossfragshift < 4)
+ as->usbin.dma.ossfragshift = 4;
+ if (as->usbin.dma.ossfragshift > 15)
+ as->usbin.dma.ossfragshift = 15;
+ if (as->usbin.dma.ossmaxfrags < 4)
+ as->usbin.dma.ossmaxfrags = 4;
+ }
+ if (file->f_mode & FMODE_WRITE) {
+ as->usbout.dma.ossfragshift = val & 0xffff;
+ as->usbout.dma.ossmaxfrags = (val >> 16) & 0xffff;
+ if (as->usbout.dma.ossfragshift < 4)
+ as->usbout.dma.ossfragshift = 4;
+ if (as->usbout.dma.ossfragshift > 15)
+ as->usbout.dma.ossfragshift = 15;
+ if (as->usbout.dma.ossmaxfrags < 4)
+ as->usbout.dma.ossmaxfrags = 4;
+ }
+ return 0;
+
+ case SNDCTL_DSP_SUBDIVIDE:
+ if ((file->f_mode & FMODE_READ && as->usbin.dma.subdivision) ||
+ (file->f_mode & FMODE_WRITE && as->usbout.dma.subdivision))
+ return -EINVAL;
+ if (get_user(val, user_arg))
+ return -EFAULT;
+ if (val != 1 && val != 2 && val != 4)
+ return -EINVAL;
+ if (file->f_mode & FMODE_READ)
+ as->usbin.dma.subdivision = val;
+ if (file->f_mode & FMODE_WRITE)
+ as->usbout.dma.subdivision = val;
+ return 0;
+
+ case SOUND_PCM_READ_RATE:
+ return put_user((file->f_mode & FMODE_READ) ?
+ as->usbin.dma.srate : as->usbout.dma.srate,
+ user_arg);
+
+ case SOUND_PCM_READ_CHANNELS:
+ val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
+ return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);
+
+ case SOUND_PCM_READ_BITS:
+ val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
+ return put_user(AFMT_IS16BIT(val2) ? 16 : 8, user_arg);
+
+ case SOUND_PCM_WRITE_FILTER:
+ case SNDCTL_DSP_SETSYNCRO:
+ case SOUND_PCM_READ_FILTER:
+ return -EINVAL;
+ }
+ dprintk((KERN_DEBUG "usbaudio: usb_audio_ioctl - no command found\n"));
+ return -ENOIOCTLCMD;
+}
+
+static int usb_audio_open(struct inode *inode, struct file *file)
+{
+ unsigned int minor = iminor(inode);
+ DECLARE_WAITQUEUE(wait, current);
+ struct usb_audiodev *as;
+ struct usb_audio_state *s;
+
+ for (;;) {
+ down(&open_sem);
+ list_for_each_entry(s, &audiodevs, audiodev) {
+ list_for_each_entry(as, &s->audiolist, list) {
+ if (!((as->dev_audio ^ minor) & ~0xf))
+ goto device_found;
+ }
+ }
+ up(&open_sem);
+ return -ENODEV;
+
+ device_found:
+ if (!s->usbdev) {
+ up(&open_sem);
+ return -EIO;
+ }
+ /* wait for device to become free */
+ if (!(as->open_mode & file->f_mode))
+ break;
+ if (file->f_flags & O_NONBLOCK) {
+ up(&open_sem);
+ return -EBUSY;
+ }
+ __set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&open_wait, &wait);
+ up(&open_sem);
+ schedule();
+ __set_current_state(TASK_RUNNING);
+ remove_wait_queue(&open_wait, &wait);
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ }
+ if (file->f_mode & FMODE_READ)
+ as->usbin.dma.ossfragshift = as->usbin.dma.ossmaxfrags = as->usbin.dma.subdivision = 0;
+ if (file->f_mode & FMODE_WRITE)
+ as->usbout.dma.ossfragshift = as->usbout.dma.ossmaxfrags = as->usbout.dma.subdivision = 0;
+ if (set_format(as, file->f_mode, ((minor & 0xf) == SND_DEV_DSP16) ? AFMT_S16_LE : AFMT_U8 /* AFMT_ULAW */, 8000)) {
+ up(&open_sem);
+ return -EIO;
+ }
+ file->private_data = as;
+ as->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
+ s->count++;
+ up(&open_sem);
+ return nonseekable_open(inode, file);
+}
+
+static int usb_audio_release(struct inode *inode, struct file *file)
+{
+ struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
+ struct usb_audio_state *s;
+ struct usb_device *dev;
+
+ lock_kernel();
+ s = as->state;
+ dev = s->usbdev;
+ if (file->f_mode & FMODE_WRITE)
+ drain_out(as, file->f_flags & O_NONBLOCK);
+ down(&open_sem);
+ if (file->f_mode & FMODE_WRITE) {
+ usbout_stop(as);
+ if (dev && as->usbout.interface >= 0)
+ usb_set_interface(dev, as->usbout.interface, 0);
+ dmabuf_release(&as->usbout.dma);
+ usbout_release(as);
+ }
+ if (file->f_mode & FMODE_READ) {
+ usbin_stop(as);
+ if (dev && as->usbin.interface >= 0)
+ usb_set_interface(dev, as->usbin.interface, 0);
+ dmabuf_release(&as->usbin.dma);
+ usbin_release(as);
+ }
+ as->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
+ release(s);
+ wake_up(&open_wait);
+ unlock_kernel();
+ return 0;
+}
+
+static /*const*/ struct file_operations usb_audio_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = usb_audio_read,
+ .write = usb_audio_write,
+ .poll = usb_audio_poll,
+ .ioctl = usb_audio_ioctl,
+ .mmap = usb_audio_mmap,
+ .open = usb_audio_open,
+ .release = usb_audio_release,
+};
+
+/* --------------------------------------------------------------------- */
+
+static int usb_audio_probe(struct usb_interface *iface,
+ const struct usb_device_id *id);
+static void usb_audio_disconnect(struct usb_interface *iface);
+
+static struct usb_device_id usb_audio_ids [] = {
+ { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
+ .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = 1},
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, usb_audio_ids);
+
+static struct usb_driver usb_audio_driver = {
+ .owner = THIS_MODULE,
+ .name = "audio",
+ .probe = usb_audio_probe,
+ .disconnect = usb_audio_disconnect,
+ .id_table = usb_audio_ids,
+};
+
+static void *find_descriptor(void *descstart, unsigned int desclen, void *after,
+ u8 dtype, int iface, int altsetting)
+{
+ u8 *p, *end, *next;
+ int ifc = -1, as = -1;
+
+ 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] == USB_DT_INTERFACE) {
+ /* minimum length of interface descriptor */
+ if (p[0] < 9)
+ return NULL;
+ ifc = p[2];
+ as = p[3];
+ }
+ if (p[1] == dtype && (!after || (void *)p > after) &&
+ (iface == -1 || iface == ifc) && (altsetting == -1 || altsetting == as)) {
+ return p;
+ }
+ p = next;
+ }
+ return NULL;
+}
+
+static void *find_csinterface_descriptor(void *descstart, unsigned int desclen, void *after, u8 dsubtype, int iface, int altsetting)
+{
+ unsigned char *p;
+
+ p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, altsetting);
+ while (p) {
+ if (p[0] >= 3 && p[2] == dsubtype)
+ return p;
+ p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, altsetting);
+ }
+ return NULL;
+}
+
+static void *find_audiocontrol_unit(void *descstart, unsigned int desclen, void *after, u8 unit, int iface)
+{
+ unsigned char *p;
+
+ p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, -1);
+ while (p) {
+ if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
+ return p;
+ p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, -1);
+ }
+ return NULL;
+}
+
+static void usb_audio_parsestreaming(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, int asifin, int asifout)
+{
+ struct usb_device *dev = s->usbdev;
+ struct usb_audiodev *as;
+ struct usb_host_interface *alts;
+ struct usb_interface *iface;
+ struct audioformat *fp;
+ unsigned char *fmt, *csep;
+ unsigned int i, j, k, format, idx;
+
+ if (!(as = kmalloc(sizeof(struct usb_audiodev), GFP_KERNEL)))
+ return;
+ memset(as, 0, sizeof(struct usb_audiodev));
+ init_waitqueue_head(&as->usbin.dma.wait);
+ init_waitqueue_head(&as->usbout.dma.wait);
+ spin_lock_init(&as->lock);
+ as->usbin.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
+ as->usbin.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
+ as->usbin.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
+ as->usbin.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
+ as->usbout.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
+ as->usbout.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
+ as->usbout.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
+ as->usbout.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
+ if ((!as->usbin.durb[0].urb) ||
+ (!as->usbin.durb[1].urb) ||
+ (!as->usbin.surb[0].urb) ||
+ (!as->usbin.surb[1].urb) ||
+ (!as->usbout.durb[0].urb) ||
+ (!as->usbout.durb[1].urb) ||
+ (!as->usbout.surb[0].urb) ||
+ (!as->usbout.surb[1].urb)) {
+ usb_free_urb(as->usbin.durb[0].urb);
+ usb_free_urb(as->usbin.durb[1].urb);
+ usb_free_urb(as->usbin.surb[0].urb);
+ usb_free_urb(as->usbin.surb[1].urb);
+ usb_free_urb(as->usbout.durb[0].urb);
+ usb_free_urb(as->usbout.durb[1].urb);
+ usb_free_urb(as->usbout.surb[0].urb);
+ usb_free_urb(as->usbout.surb[1].urb);
+ kfree(as);
+ return;
+ }
+ as->state = s;
+ as->usbin.interface = asifin;
+ as->usbout.interface = asifout;
+ /* search for input formats */
+ if (asifin >= 0) {
+ as->usbin.flags = FLG_CONNECTED;
+ iface = usb_ifnum_to_if(dev, asifin);
+ for (idx = 0; idx < iface->num_altsetting; idx++) {
+ alts = &iface->altsetting[idx];
+ i = alts->desc.bAlternateSetting;
+ if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
+ continue;
+ if (alts->desc.bNumEndpoints < 1) {
+ if (i != 0) { /* altsetting 0 has no endpoints (Section B.3.4.1) */
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
+ dev->devnum, asifin, i);
+ }
+ continue;
+ }
+ if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
+ !(alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous in\n",
+ dev->devnum, asifin, i);
+ continue;
+ }
+ fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifin, i);
+ if (!fmt) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
+ dev->devnum, asifin, i);
+ continue;
+ }
+ if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
+ dev->devnum, asifin, i);
+ continue;
+ }
+ format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
+ fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifin, i);
+ if (!fmt) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
+ dev->devnum, asifin, i);
+ continue;
+ }
+ if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
+ dev->devnum, asifin, i);
+ continue;
+ }
+ if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
+ dev->devnum, asifin, i, fmt[4], fmt[5]);
+ continue;
+ }
+ csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifin, i);
+ if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
+ dev->devnum, asifin, i);
+ continue;
+ }
+ if (as->numfmtin >= MAXFORMATS)
+ continue;
+ fp = &as->fmtin[as->numfmtin++];
+ if (fmt[5] == 2)
+ format &= (AFMT_U16_LE | AFMT_S16_LE);
+ else
+ format &= (AFMT_U8 | AFMT_S8);
+ if (fmt[4] == 2)
+ format |= AFMT_STEREO;
+ fp->format = format;
+ fp->altsetting = i;
+ fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
+ printk(KERN_INFO "usbaudio: valid input sample rate %u\n", fp->sratelo);
+ for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
+ k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
+ printk(KERN_INFO "usbaudio: valid input sample rate %u\n", k);
+ if (k > fp->sratehi)
+ fp->sratehi = k;
+ if (k < fp->sratelo)
+ fp->sratelo = k;
+ }
+ fp->attributes = csep[3];
+ printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
+ dev->devnum, asifin, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
+ }
+ }
+ /* search for output formats */
+ if (asifout >= 0) {
+ as->usbout.flags = FLG_CONNECTED;
+ iface = usb_ifnum_to_if(dev, asifout);
+ for (idx = 0; idx < iface->num_altsetting; idx++) {
+ alts = &iface->altsetting[idx];
+ i = alts->desc.bAlternateSetting;
+ if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
+ continue;
+ if (alts->desc.bNumEndpoints < 1) {
+ /* altsetting 0 should never have iso EPs */
+ if (i != 0)
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
+ (alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous out\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ /* See USB audio formats manual, section 2 */
+ fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifout, i);
+ if (!fmt) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
+ /* Dallas DS4201 workaround */
+ if (le16_to_cpu(dev->descriptor.idVendor) == 0x04fa &&
+ le16_to_cpu(dev->descriptor.idProduct) == 0x4201)
+ format = (AFMT_S16_LE | AFMT_S8);
+ fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifout, i);
+ if (!fmt) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
+ dev->devnum, asifout, i, fmt[4], fmt[5]);
+ continue;
+ }
+ csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifout, i);
+ if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
+ printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ if (as->numfmtout >= MAXFORMATS)
+ continue;
+ fp = &as->fmtout[as->numfmtout++];
+ if (fmt[5] == 2)
+ format &= (AFMT_U16_LE | AFMT_S16_LE);
+ else
+ format &= (AFMT_U8 | AFMT_S8);
+ if (fmt[4] == 2)
+ format |= AFMT_STEREO;
+ fp->format = format;
+ fp->altsetting = i;
+ fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
+ printk(KERN_INFO "usbaudio: valid output sample rate %u\n", fp->sratelo);
+ for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
+ k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
+ printk(KERN_INFO "usbaudio: valid output sample rate %u\n", k);
+ if (k > fp->sratehi)
+ fp->sratehi = k;
+ if (k < fp->sratelo)
+ fp->sratelo = k;
+ }
+ fp->attributes = csep[3];
+ printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
+ dev->devnum, asifout, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
+ }
+ }
+ if (as->numfmtin == 0 && as->numfmtout == 0) {
+ usb_free_urb(as->usbin.durb[0].urb);
+ usb_free_urb(as->usbin.durb[1].urb);
+ usb_free_urb(as->usbin.surb[0].urb);
+ usb_free_urb(as->usbin.surb[1].urb);
+ usb_free_urb(as->usbout.durb[0].urb);
+ usb_free_urb(as->usbout.durb[1].urb);
+ usb_free_urb(as->usbout.surb[0].urb);
+ usb_free_urb(as->usbout.surb[1].urb);
+ kfree(as);
+ return;
+ }
+ if ((as->dev_audio = register_sound_dsp(&usb_audio_fops, -1)) < 0) {
+ printk(KERN_ERR "usbaudio: cannot register dsp\n");
+ usb_free_urb(as->usbin.durb[0].urb);
+ usb_free_urb(as->usbin.durb[1].urb);
+ usb_free_urb(as->usbin.surb[0].urb);
+ usb_free_urb(as->usbin.surb[1].urb);
+ usb_free_urb(as->usbout.durb[0].urb);
+ usb_free_urb(as->usbout.durb[1].urb);
+ usb_free_urb(as->usbout.surb[0].urb);
+ usb_free_urb(as->usbout.surb[1].urb);
+ kfree(as);
+ return;
+ }
+ printk(KERN_INFO "usbaudio: registered dsp 14,%d\n", as->dev_audio);
+ /* everything successful */
+ list_add_tail(&as->list, &s->audiolist);
+}
+
+struct consmixstate {
+ struct usb_audio_state *s;
+ unsigned char *buffer;
+ unsigned int buflen;
+ unsigned int ctrlif;
+ struct mixerchannel mixch[SOUND_MIXER_NRDEVICES];
+ unsigned int nrmixch;
+ unsigned int mixchmask;
+ unsigned long unitbitmap[32/sizeof(unsigned long)];
+ /* return values */
+ unsigned int nrchannels;
+ unsigned int termtype;
+ unsigned int chconfig;
+};
+
+static struct mixerchannel *getmixchannel(struct consmixstate *state, unsigned int nr)
+{
+ struct mixerchannel *c;
+
+ if (nr >= SOUND_MIXER_NRDEVICES) {
+ printk(KERN_ERR "usbaudio: invalid OSS mixer channel %u\n", nr);
+ return NULL;
+ }
+ if (!(state->mixchmask & (1 << nr))) {
+ printk(KERN_WARNING "usbaudio: OSS mixer channel %u already in use\n", nr);
+ return NULL;
+ }
+ c = &state->mixch[state->nrmixch++];
+ c->osschannel = nr;
+ state->mixchmask &= ~(1 << nr);
+ return c;
+}
+
+static unsigned int getvolchannel(struct consmixstate *state)
+{
+ unsigned int u;
+
+ if ((state->termtype & 0xff00) == 0x0000 && (state->mixchmask & SOUND_MASK_VOLUME))
+ return SOUND_MIXER_VOLUME;
+ if ((state->termtype & 0xff00) == 0x0100) {
+ if (state->mixchmask & SOUND_MASK_PCM)
+ return SOUND_MIXER_PCM;
+ if (state->mixchmask & SOUND_MASK_ALTPCM)
+ return SOUND_MIXER_ALTPCM;
+ }
+ if ((state->termtype & 0xff00) == 0x0200 && (state->mixchmask & SOUND_MASK_MIC))
+ return SOUND_MIXER_MIC;
+ if ((state->termtype & 0xff00) == 0x0300 && (state->mixchmask & SOUND_MASK_SPEAKER))
+ return SOUND_MIXER_SPEAKER;
+ if ((state->termtype & 0xff00) == 0x0500) {
+ if (state->mixchmask & SOUND_MASK_PHONEIN)
+ return SOUND_MIXER_PHONEIN;
+ if (state->mixchmask & SOUND_MASK_PHONEOUT)
+ return SOUND_MIXER_PHONEOUT;
+ }
+ if (state->termtype >= 0x710 && state->termtype <= 0x711 && (state->mixchmask & SOUND_MASK_RADIO))
+ return SOUND_MIXER_RADIO;
+ if (state->termtype >= 0x709 && state->termtype <= 0x70f && (state->mixchmask & SOUND_MASK_VIDEO))
+ return SOUND_MIXER_VIDEO;
+ u = ffs(state->mixchmask & (SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_LINE1 | SOUND_MASK_LINE2 | SOUND_MASK_LINE3 |
+ SOUND_MASK_DIGITAL1 | SOUND_MASK_DIGITAL2 | SOUND_MASK_DIGITAL3));
+ return u-1;
+}
+
+static void prepmixch(struct consmixstate *state)
+{
+ struct usb_device *dev = state->s->usbdev;
+ struct mixerchannel *ch;
+ unsigned char *buf;
+ __s16 v1;
+ unsigned int v2, v3;
+
+ if (!state->nrmixch || state->nrmixch > SOUND_MIXER_NRDEVICES)
+ return;
+ buf = kmalloc(sizeof(*buf) * 2, GFP_KERNEL);
+ if (!buf) {
+ printk(KERN_ERR "prepmixch: out of memory\n") ;
+ return;
+ }
+
+ ch = &state->mixch[state->nrmixch-1];
+ switch (ch->selector) {
+ case 0: /* mixer unit request */
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
+ goto err;
+ ch->minval = buf[0] | (buf[1] << 8);
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
+ goto err;
+ ch->maxval = buf[0] | (buf[1] << 8);
+ v2 = ch->maxval - ch->minval;
+ if (!v2)
+ v2 = 1;
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
+ goto err;
+ v1 = buf[0] | (buf[1] << 8);
+ v3 = v1 - ch->minval;
+ v3 = 100 * v3 / v2;
+ if (v3 > 100)
+ v3 = 100;
+ ch->value = v3;
+ if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
+ state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
+ goto err;
+ v1 = buf[0] | (buf[1] << 8);
+ v3 = v1 - ch->minval;
+ v3 = 100 * v3 / v2;
+ if (v3 > 100)
+ v3 = 100;
+ }
+ ch->value |= v3 << 8;
+ break;
+
+ /* various feature unit controls */
+ case VOLUME_CONTROL:
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
+ goto err;
+ ch->minval = buf[0] | (buf[1] << 8);
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
+ goto err;
+ ch->maxval = buf[0] | (buf[1] << 8);
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
+ goto err;
+ v1 = buf[0] | (buf[1] << 8);
+ v2 = ch->maxval - ch->minval;
+ v3 = v1 - ch->minval;
+ if (!v2)
+ v2 = 1;
+ v3 = 100 * v3 / v2;
+ if (v3 > 100)
+ v3 = 100;
+ ch->value = v3;
+ if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
+ goto err;
+ v1 = buf[0] | (buf[1] << 8);
+ v3 = v1 - ch->minval;
+ v3 = 100 * v3 / v2;
+ if (v3 > 100)
+ v3 = 100;
+ }
+ ch->value |= v3 << 8;
+ break;
+
+ case BASS_CONTROL:
+ case MID_CONTROL:
+ case TREBLE_CONTROL:
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
+ goto err;
+ ch->minval = buf[0] << 8;
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
+ goto err;
+ ch->maxval = buf[0] << 8;
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
+ goto err;
+ v1 = buf[0] << 8;
+ v2 = ch->maxval - ch->minval;
+ v3 = v1 - ch->minval;
+ if (!v2)
+ v2 = 1;
+ v3 = 100 * v3 / v2;
+ if (v3 > 100)
+ v3 = 100;
+ ch->value = v3;
+ if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
+ goto err;
+ v1 = buf[0] << 8;
+ v3 = v1 - ch->minval;
+ v3 = 100 * v3 / v2;
+ if (v3 > 100)
+ v3 = 100;
+ }
+ ch->value |= v3 << 8;
+ break;
+
+ default:
+ goto err;
+ }
+
+ freebuf:
+ kfree(buf);
+ return;
+ err:
+ printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
+ dev->devnum, state->ctrlif, ch->unitid, ch->chnum, ch->selector);
+ if (state->nrmixch)
+ state->nrmixch--;
+ goto freebuf;
+}
+
+
+static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid);
+
+static inline int checkmixbmap(unsigned char *bmap, unsigned char flg, unsigned int inidx, unsigned int numoch)
+{
+ unsigned int idx;
+
+ idx = inidx*numoch;
+ if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
+ return 0;
+ if (!(flg & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
+ return 1;
+ idx = (inidx+!!(flg & MIXFLG_STEREOIN))*numoch+!!(flg & MIXFLG_STEREOOUT);
+ if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
+ return 0;
+ return 1;
+}
+
+static void usb_audio_mixerunit(struct consmixstate *state, unsigned char *mixer)
+{
+ unsigned int nroutch = mixer[5+mixer[4]];
+ unsigned int chidx[SOUND_MIXER_NRDEVICES+1];
+ unsigned int termt[SOUND_MIXER_NRDEVICES];
+ unsigned char flg = (nroutch >= 2) ? MIXFLG_STEREOOUT : 0;
+ unsigned char *bmap = &mixer[9+mixer[4]];
+ unsigned int bmapsize;
+ struct mixerchannel *ch;
+ unsigned int i;
+
+ if (!mixer[4]) {
+ printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor\n", mixer[3]);
+ return;
+ }
+ if (mixer[4] > SOUND_MIXER_NRDEVICES) {
+ printk(KERN_ERR "usbaudio: mixer unit %u: too many input pins\n", mixer[3]);
+ return;
+ }
+ chidx[0] = 0;
+ for (i = 0; i < mixer[4]; i++) {
+ usb_audio_recurseunit(state, mixer[5+i]);
+ chidx[i+1] = chidx[i] + state->nrchannels;
+ termt[i] = state->termtype;
+ }
+ state->termtype = 0;
+ state->chconfig = mixer[6+mixer[4]] | (mixer[7+mixer[4]] << 8);
+ bmapsize = (nroutch * chidx[mixer[4]] + 7) >> 3;
+ bmap += bmapsize - 1;
+ if (mixer[0] < 10+mixer[4]+bmapsize) {
+ printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor (bitmap too small)\n", mixer[3]);
+ return;
+ }
+ for (i = 0; i < mixer[4]; i++) {
+ state->termtype = termt[i];
+ if (chidx[i+1]-chidx[i] >= 2) {
+ flg |= MIXFLG_STEREOIN;
+ if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
+ ch = getmixchannel(state, getvolchannel(state));
+ if (ch) {
+ ch->unitid = mixer[3];
+ ch->selector = 0;
+ ch->chnum = chidx[i]+1;
+ ch->flags = flg;
+ prepmixch(state);
+ }
+ continue;
+ }
+ }
+ flg &= ~MIXFLG_STEREOIN;
+ if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
+ ch = getmixchannel(state, getvolchannel(state));
+ if (ch) {
+ ch->unitid = mixer[3];
+ ch->selector = 0;
+ ch->chnum = chidx[i]+1;
+ ch->flags = flg;
+ prepmixch(state);
+ }
+ }
+ }
+ state->termtype = 0;
+}
+
+static struct mixerchannel *slctsrc_findunit(struct consmixstate *state, __u8 unitid)
+{
+ unsigned int i;
+
+ for (i = 0; i < state->nrmixch; i++)
+ if (state->mixch[i].unitid == unitid)
+ return &state->mixch[i];
+ return NULL;
+}
+
+static void usb_audio_selectorunit(struct consmixstate *state, unsigned char *selector)
+{
+ unsigned int chnum, i, mixch;
+ struct mixerchannel *mch;
+
+ if (!selector[4]) {
+ printk(KERN_ERR "usbaudio: unit %u invalid SELECTOR_UNIT descriptor\n", selector[3]);
+ return;
+ }
+ mixch = state->nrmixch;
+ usb_audio_recurseunit(state, selector[5]);
+ if (state->nrmixch != mixch) {
+ mch = &state->mixch[state->nrmixch-1];
+ mch->slctunitid = selector[3] | (1 << 8);
+ } else if ((mch = slctsrc_findunit(state, selector[5]))) {
+ mch->slctunitid = selector[3] | (1 << 8);
+ } else {
+ printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel 1\n", selector[3]);
+ }
+ chnum = state->nrchannels;
+ for (i = 1; i < selector[4]; i++) {
+ mixch = state->nrmixch;
+ usb_audio_recurseunit(state, selector[5+i]);
+ if (chnum != state->nrchannels) {
+ printk(KERN_ERR "usbaudio: selector unit %u: input pins with varying channel numbers\n", selector[3]);
+ state->termtype = 0;
+ state->chconfig = 0;
+ state->nrchannels = 0;
+ return;
+ }
+ if (state->nrmixch != mixch) {
+ mch = &state->mixch[state->nrmixch-1];
+ mch->slctunitid = selector[3] | ((i + 1) << 8);
+ } else if ((mch = slctsrc_findunit(state, selector[5+i]))) {
+ mch->slctunitid = selector[3] | ((i + 1) << 8);
+ } else {
+ printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel %u\n", selector[3], i+1);
+ }
+ }
+ state->termtype = 0;
+ state->chconfig = 0;
+}
+
+/* in the future we might try to handle 3D etc. effect units */
+
+static void usb_audio_processingunit(struct consmixstate *state, unsigned char *proc)
+{
+ unsigned int i;
+
+ for (i = 0; i < proc[6]; i++)
+ usb_audio_recurseunit(state, proc[7+i]);
+ state->nrchannels = proc[7+proc[6]];
+ state->termtype = 0;
+ state->chconfig = proc[8+proc[6]] | (proc[9+proc[6]] << 8);
+}
+
+
+/* See Audio Class Spec, section 4.3.2.5 */
+static void usb_audio_featureunit(struct consmixstate *state, unsigned char *ftr)
+{
+ struct mixerchannel *ch;
+ unsigned short chftr, mchftr;
+#if 0
+ struct usb_device *dev = state->s->usbdev;
+ unsigned char data[1];
+#endif
+ unsigned char nr_logical_channels, i;
+
+ usb_audio_recurseunit(state, ftr[4]);
+
+ if (ftr[5] == 0 ) {
+ printk(KERN_ERR "usbaudio: wrong controls size in feature unit %u\n",ftr[3]);
+ return;
+ }
+
+ if (state->nrchannels == 0) {
+ printk(KERN_ERR "usbaudio: feature unit %u source has no channels\n", ftr[3]);
+ return;
+ }
+ if (state->nrchannels > 2)
+ printk(KERN_WARNING "usbaudio: feature unit %u: OSS mixer interface does not support more than 2 channels\n", ftr[3]);
+
+ nr_logical_channels=(ftr[0]-7)/ftr[5]-1;
+
+ if (nr_logical_channels != state->nrchannels) {
+ printk(KERN_WARNING "usbaudio: warning: found %d of %d logical channels.\n", state->nrchannels,nr_logical_channels);
+
+ if (state->nrchannels == 1 && nr_logical_channels==0) {
+ printk(KERN_INFO "usbaudio: assuming the channel found is the master channel (got a Philips camera?). Should be fine.\n");
+ } else if (state->nrchannels == 1 && nr_logical_channels==2) {
+ printk(KERN_INFO "usbaudio: assuming that a stereo channel connected directly to a mixer is missing in search (got Labtec headset?). Should be fine.\n");
+ state->nrchannels=nr_logical_channels;
+ } else {
+ printk(KERN_WARNING "usbaudio: no idea what's going on..., contact linux-usb-devel@lists.sourceforge.net\n");
+ }
+ }
+
+ /* There is always a master channel */
+ mchftr = ftr[6];
+ /* Binary AND over logical channels if they exist */
+ if (nr_logical_channels) {
+ chftr = ftr[6+ftr[5]];
+ for (i = 2; i <= nr_logical_channels; i++)
+ chftr &= ftr[6+i*ftr[5]];
+ } else {
+ chftr = 0;
+ }
+
+ /* volume control */
+ if (chftr & 2) {
+ ch = getmixchannel(state, getvolchannel(state));
+ if (ch) {
+ ch->unitid = ftr[3];
+ ch->selector = VOLUME_CONTROL;
+ ch->chnum = 1;
+ ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
+ prepmixch(state);
+ }
+ } else if (mchftr & 2) {
+ ch = getmixchannel(state, getvolchannel(state));
+ if (ch) {
+ ch->unitid = ftr[3];
+ ch->selector = VOLUME_CONTROL;
+ ch->chnum = 0;
+ ch->flags = 0;
+ prepmixch(state);
+ }
+ }
+ /* bass control */
+ if (chftr & 4) {
+ ch = getmixchannel(state, SOUND_MIXER_BASS);
+ if (ch) {
+ ch->unitid = ftr[3];
+ ch->selector = BASS_CONTROL;
+ ch->chnum = 1;
+ ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
+ prepmixch(state);
+ }
+ } else if (mchftr & 4) {
+ ch = getmixchannel(state, SOUND_MIXER_BASS);
+ if (ch) {
+ ch->unitid = ftr[3];
+ ch->selector = BASS_CONTROL;
+ ch->chnum = 0;
+ ch->flags = 0;
+ prepmixch(state);
+ }
+ }
+ /* treble control */
+ if (chftr & 16) {
+ ch = getmixchannel(state, SOUND_MIXER_TREBLE);
+ if (ch) {
+ ch->unitid = ftr[3];
+ ch->selector = TREBLE_CONTROL;
+ ch->chnum = 1;
+ ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
+ prepmixch(state);
+ }
+ } else if (mchftr & 16) {
+ ch = getmixchannel(state, SOUND_MIXER_TREBLE);
+ if (ch) {
+ ch->unitid = ftr[3];
+ ch->selector = TREBLE_CONTROL;
+ ch->chnum = 0;
+ ch->flags = 0;
+ prepmixch(state);
+ }
+ }
+#if 0
+ /* if there are mute controls, unmute them */
+ /* does not seem to be necessary, and the Dallas chip does not seem to support the "all" channel (255) */
+ if ((chftr & 1) || (mchftr & 1)) {
+ printk(KERN_DEBUG "usbaudio: unmuting feature unit %u interface %u\n", ftr[3], state->ctrlif);
+ data[0] = 0;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ (MUTE_CONTROL << 8) | 0xff, state->ctrlif | (ftr[3] << 8), data, 1, 1000) < 0)
+ printk(KERN_WARNING "usbaudio: failure to unmute feature unit %u interface %u\n", ftr[3], state->ctrlif);
+ }
+#endif
+}
+
+static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid)
+{
+ unsigned char *p1;
+ unsigned int i, j;
+
+ if (test_and_set_bit(unitid, state->unitbitmap)) {
+ printk(KERN_INFO "usbaudio: mixer path revisits unit %d\n", unitid);
+ return;
+ }
+ p1 = find_audiocontrol_unit(state->buffer, state->buflen, NULL, unitid, state->ctrlif);
+ if (!p1) {
+ printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
+ return;
+ }
+ state->nrchannels = 0;
+ state->termtype = 0;
+ state->chconfig = 0;
+ switch (p1[2]) {
+ case INPUT_TERMINAL:
+ if (p1[0] < 12) {
+ printk(KERN_ERR "usbaudio: unit %u: invalid INPUT_TERMINAL descriptor\n", unitid);
+ return;
+ }
+ state->nrchannels = p1[7];
+ state->termtype = p1[4] | (p1[5] << 8);
+ state->chconfig = p1[8] | (p1[9] << 8);
+ return;
+
+ case MIXER_UNIT:
+ if (p1[0] < 10 || p1[0] < 10+p1[4]) {
+ printk(KERN_ERR "usbaudio: unit %u: invalid MIXER_UNIT descriptor\n", unitid);
+ return;
+ }
+ usb_audio_mixerunit(state, p1);
+ return;
+
+ case SELECTOR_UNIT:
+ if (p1[0] < 6 || p1[0] < 6+p1[4]) {
+ printk(KERN_ERR "usbaudio: unit %u: invalid SELECTOR_UNIT descriptor\n", unitid);
+ return;
+ }
+ usb_audio_selectorunit(state, p1);
+ return;
+
+ case FEATURE_UNIT: /* See USB Audio Class Spec 4.3.2.5 */
+ if (p1[0] < 7 || p1[0] < 7+p1[5]) {
+ printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
+ return;
+ }
+ usb_audio_featureunit(state, p1);
+ return;
+
+ case PROCESSING_UNIT:
+ if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
+ printk(KERN_ERR "usbaudio: unit %u: invalid PROCESSING_UNIT descriptor\n", unitid);
+ return;
+ }
+ usb_audio_processingunit(state, p1);
+ return;
+
+ case EXTENSION_UNIT:
+ if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
+ printk(KERN_ERR "usbaudio: unit %u: invalid EXTENSION_UNIT descriptor\n", unitid);
+ return;
+ }
+ for (j = i = 0; i < p1[6]; i++) {
+ usb_audio_recurseunit(state, p1[7+i]);
+ if (!i)
+ j = state->termtype;
+ else if (j != state->termtype)
+ j = 0;
+ }
+ state->nrchannels = p1[7+p1[6]];
+ state->chconfig = p1[8+p1[6]] | (p1[9+p1[6]] << 8);
+ state->termtype = j;
+ return;
+
+ default:
+ printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
+ return;
+ }
+}
+
+static void usb_audio_constructmixer(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif, unsigned char *oterm)
+{
+ struct usb_mixerdev *ms;
+ struct consmixstate state;
+
+ memset(&state, 0, sizeof(state));
+ state.s = s;
+ state.nrmixch = 0;
+ state.mixchmask = ~0;
+ state.buffer = buffer;
+ state.buflen = buflen;
+ state.ctrlif = ctrlif;
+ set_bit(oterm[3], state.unitbitmap); /* mark terminal ID as visited */
+ printk(KERN_DEBUG "usbaudio: constructing mixer for Terminal %u type 0x%04x\n",
+ oterm[3], oterm[4] | (oterm[5] << 8));
+ usb_audio_recurseunit(&state, oterm[7]);
+ if (!state.nrmixch) {
+ printk(KERN_INFO "usbaudio: no mixer controls found for Terminal %u\n", oterm[3]);
+ return;
+ }
+ if (!(ms = kmalloc(sizeof(struct usb_mixerdev)+state.nrmixch*sizeof(struct mixerchannel), GFP_KERNEL)))
+ return;
+ memset(ms, 0, sizeof(struct usb_mixerdev));
+ memcpy(&ms->ch, &state.mixch, state.nrmixch*sizeof(struct mixerchannel));
+ ms->state = s;
+ ms->iface = ctrlif;
+ ms->numch = state.nrmixch;
+ if ((ms->dev_mixer = register_sound_mixer(&usb_mixer_fops, -1)) < 0) {
+ printk(KERN_ERR "usbaudio: cannot register mixer\n");
+ kfree(ms);
+ return;
+ }
+ printk(KERN_INFO "usbaudio: registered mixer 14,%d\n", ms->dev_mixer);
+ list_add_tail(&ms->list, &s->mixerlist);
+}
+
+/* arbitrary limit, we won't check more interfaces than this */
+#define USB_MAXINTERFACES 32
+
+static struct usb_audio_state *usb_audio_parsecontrol(struct usb_device *dev, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif)
+{
+ struct usb_audio_state *s;
+ struct usb_interface *iface;
+ struct usb_host_interface *alt;
+ unsigned char ifin[USB_MAXINTERFACES], ifout[USB_MAXINTERFACES];
+ unsigned char *p1;
+ unsigned int i, j, k, numifin = 0, numifout = 0;
+
+ if (!(s = kmalloc(sizeof(struct usb_audio_state), GFP_KERNEL)))
+ return NULL;
+ memset(s, 0, sizeof(struct usb_audio_state));
+ INIT_LIST_HEAD(&s->audiolist);
+ INIT_LIST_HEAD(&s->mixerlist);
+ s->usbdev = dev;
+ s->count = 1;
+
+ /* find audiocontrol interface */
+ if (!(p1 = find_csinterface_descriptor(buffer, buflen, NULL, HEADER, ctrlif, -1))) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u no HEADER found\n",
+ dev->devnum, ctrlif);
+ goto ret;
+ }
+ if (p1[0] < 8 + p1[7]) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u HEADER error\n",
+ dev->devnum, ctrlif);
+ goto ret;
+ }
+ if (!p1[7])
+ printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has no AudioStreaming and MidiStreaming interfaces\n",
+ dev->devnum, ctrlif);
+ for (i = 0; i < p1[7]; i++) {
+ j = p1[8+i];
+ iface = usb_ifnum_to_if(dev, j);
+ if (!iface) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u does not exist\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (iface->num_altsetting == 1) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u has only 1 altsetting.\n", dev->devnum, ctrlif);
+ continue;
+ }
+ alt = usb_altnum_to_altsetting(iface, 0);
+ if (!alt) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 0\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (alt->desc.bInterfaceClass != USB_CLASS_AUDIO) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u is not an AudioClass interface\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (alt->desc.bInterfaceSubClass == 3) {
+ printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u interface %u MIDIStreaming not supported\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (alt->desc.bInterfaceSubClass != 2) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u invalid AudioClass subtype\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (alt->desc.bNumEndpoints > 0) {
+ /* Check all endpoints; should they all have a bandwidth of 0 ? */
+ for (k = 0; k < alt->desc.bNumEndpoints; k++) {
+ if (le16_to_cpu(alt->endpoint[k].desc.wMaxPacketSize) > 0) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u endpoint %d does not have 0 bandwidth at alt[0]\n", dev->devnum, ctrlif, k);
+ break;
+ }
+ }
+ if (k < alt->desc.bNumEndpoints)
+ continue;
+ }
+
+ alt = usb_altnum_to_altsetting(iface, 1);
+ if (!alt) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 1\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (alt->desc.bNumEndpoints < 1) {
+ printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no endpoint\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ /* note: this requires the data endpoint to be ep0 and the optional sync
+ ep to be ep1, which seems to be the case */
+ if (alt->endpoint[0].desc.bEndpointAddress & USB_DIR_IN) {
+ if (numifin < USB_MAXINTERFACES) {
+ ifin[numifin++] = j;
+ usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
+ }
+ } else {
+ if (numifout < USB_MAXINTERFACES) {
+ ifout[numifout++] = j;
+ usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
+ }
+ }
+ }
+ printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has %u input and %u output AudioStreaming interfaces\n",
+ dev->devnum, ctrlif, numifin, numifout);
+ for (i = 0; i < numifin && i < numifout; i++)
+ usb_audio_parsestreaming(s, buffer, buflen, ifin[i], ifout[i]);
+ for (j = i; j < numifin; j++)
+ usb_audio_parsestreaming(s, buffer, buflen, ifin[i], -1);
+ for (j = i; j < numifout; j++)
+ usb_audio_parsestreaming(s, buffer, buflen, -1, ifout[i]);
+ /* now walk through all OUTPUT_TERMINAL descriptors to search for mixers */
+ p1 = find_csinterface_descriptor(buffer, buflen, NULL, OUTPUT_TERMINAL, ctrlif, -1);
+ while (p1) {
+ if (p1[0] >= 9)
+ usb_audio_constructmixer(s, buffer, buflen, ctrlif, p1);
+ p1 = find_csinterface_descriptor(buffer, buflen, p1, OUTPUT_TERMINAL, ctrlif, -1);
+ }
+
+ret:
+ if (list_empty(&s->audiolist) && list_empty(&s->mixerlist)) {
+ kfree(s);
+ return NULL;
+ }
+ /* everything successful */
+ down(&open_sem);
+ list_add_tail(&s->audiodev, &audiodevs);
+ up(&open_sem);
+ printk(KERN_DEBUG "usb_audio_parsecontrol: usb_audio_state at %p\n", s);
+ return s;
+}
+
+/* we only care for the currently active configuration */
+
+static int usb_audio_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *dev = interface_to_usbdev (intf);
+ struct usb_audio_state *s;
+ unsigned char *buffer;
+ unsigned int buflen;
+
+#if 0
+ printk(KERN_DEBUG "usbaudio: Probing if %i: IC %x, ISC %x\n", ifnum,
+ config->interface[ifnum].altsetting[0].desc.bInterfaceClass,
+ config->interface[ifnum].altsetting[0].desc.bInterfaceSubClass);
+#endif
+
+ /*
+ * audiocontrol interface found
+ * find which configuration number is active
+ */
+ buffer = dev->rawdescriptors[dev->actconfig - dev->config];
+ buflen = le16_to_cpu(dev->actconfig->desc.wTotalLength);
+ s = usb_audio_parsecontrol(dev, buffer, buflen, intf->altsetting->desc.bInterfaceNumber);
+ if (s) {
+ usb_set_intfdata (intf, s);
+ return 0;
+ }
+ return -ENODEV;
+}
+
+
+/* a revoke facility would make things simpler */
+
+static void usb_audio_disconnect(struct usb_interface *intf)
+{
+ struct usb_audio_state *s = usb_get_intfdata (intf);
+ struct usb_audiodev *as;
+ struct usb_mixerdev *ms;
+
+ if (!s)
+ return;
+
+ /* we get called with -1 for every audiostreaming interface registered */
+ if (s == (struct usb_audio_state *)-1) {
+ dprintk((KERN_DEBUG "usbaudio: note, usb_audio_disconnect called with -1\n"));
+ return;
+ }
+ if (!s->usbdev) {
+ dprintk((KERN_DEBUG "usbaudio: error, usb_audio_disconnect already called for %p!\n", s));
+ return;
+ }
+ down(&open_sem);
+ list_del_init(&s->audiodev);
+ s->usbdev = NULL;
+ usb_set_intfdata (intf, NULL);
+
+ /* deregister all audio and mixer devices, so no new processes can open this device */
+ list_for_each_entry(as, &s->audiolist, list) {
+ usbin_disc(as);
+ usbout_disc(as);
+ wake_up(&as->usbin.dma.wait);
+ wake_up(&as->usbout.dma.wait);
+ if (as->dev_audio >= 0) {
+ unregister_sound_dsp(as->dev_audio);
+ printk(KERN_INFO "usbaudio: unregister dsp 14,%d\n", as->dev_audio);
+ }
+ as->dev_audio = -1;
+ }
+ list_for_each_entry(ms, &s->mixerlist, list) {
+ if (ms->dev_mixer >= 0) {
+ unregister_sound_mixer(ms->dev_mixer);
+ printk(KERN_INFO "usbaudio: unregister mixer 14,%d\n", ms->dev_mixer);
+ }
+ ms->dev_mixer = -1;
+ }
+ release(s);
+ wake_up(&open_wait);
+}
+
+static int __init usb_audio_init(void)
+{
+ int result = usb_register(&usb_audio_driver);
+ if (result == 0)
+ info(DRIVER_VERSION ":" DRIVER_DESC);
+ return result;
+}
+
+
+static void __exit usb_audio_cleanup(void)
+{
+ usb_deregister(&usb_audio_driver);
+}
+
+module_init(usb_audio_init);
+module_exit(usb_audio_cleanup);
+
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+