patch-2.3.20 linux/drivers/usb/audio.c
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- Lines: 3536
- Date:
Thu Oct 7 10:17:09 1999
- Orig file:
v2.3.19/linux/drivers/usb/audio.c
- Orig date:
Fri Sep 10 23:57:35 1999
diff -u --recursive --new-file v2.3.19/linux/drivers/usb/audio.c linux/drivers/usb/audio.c
@@ -1,25 +1,2495 @@
+/*****************************************************************************/
+
+/*
+ * audio.c -- USB Audio Class driver
+ *
+ * Copyright (C) 1999
+ * 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.
+ *
+ *
+ * 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.
+ *
+ */
+
+/*
+ * 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:
+ * - The IO code seems to work a couple of frames, but then gets
+ * UHCI into a "complaining" mode, i.e. uhci won't work again until
+ * removed and reloaded, it will not even notice disconnect/reconnect
+ * events.
+ * It seems to work more stably on OHCI-HCD.
+ *
+ * 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 fetched from the device.
+ * Then the HEADER descriptor is fetched. 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/malloc.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/sched.h>
#include <linux/module.h>
+#include <linux/sound.h>
+#include <linux/soundcard.h>
+#include <linux/list.h>
+#include <linux/vmalloc.h>
+#include <linux/wrapper.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/bitops.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <linux/spinlock.h>
+
+#include "usb.h"
+#include "audio.h"
+
+#define AUDIO_DEBUG 1
+
+#define SND_DEV_DSP16 5
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * 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 4
+
+#define MIXFLG_STEREOIN 1
+#define MIXFLG_STEREOOUT 2
+
+struct mixerchannel {
+ __u16 value;
+ __u16 osschannel; /* number of the OSS channel */
+ __s16 minval, maxval;
+ __u8 unitid;
+ __u8 selector;
+ __u8 chnum;
+ __u8 flags;
+};
+
+struct audioformat {
+ unsigned int format;
+ unsigned int sratelo;
+ unsigned int sratehi;
+ unsigned char altsetting;
+};
+
+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_NEXTID 1
+#define FLG_ID0RUNNING 2
+#define FLG_ID1RUNNING 4
+#define FLG_SYNCNEXTID 8
+#define FLG_SYNC0RUNNING 16
+#define FLG_SYNC1RUNNING 32
+#define FLG_RUNNING 64
+
+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 {
+ unsigned int interface; /* Interface number */
+ 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 phase; /* phase accumulator */
+ unsigned int flags; /* see FLG_ defines */
+
+ struct usb_isoc_desc *dataiso[2]; /* ISO descriptors for the data endpoint */
+ unsigned char *data[2]; /* data pages associated with the ISO descriptors */
+
+ struct usb_isoc_desc *synciso[2]; /* ISO sync pipe descriptor if needed */
+ unsigned char *syncdata[2]; /* data page for sync data */
+
+ struct dmabuf dma;
+ } usbin;
+
+ struct usbout {
+ unsigned int interface; /* Interface number */
+ 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 phase; /* phase accumulator */
+ unsigned int flags; /* see FLG_ defines */
+
+ struct usb_isoc_desc *dataiso[2]; /* ISO descriptors for the data endpoint */
+ unsigned char *data[2]; /* data pages associated with the ISO descriptors */
+
+ struct usb_isoc_desc *synciso[2]; /* ISO sync pipe descriptor if needed */
+ unsigned char *syncdata[2]; /* data page for sync data */
+
+ 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))
+
+/* --------------------------------------------------------------------- */
+
+extern 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;
+ mem_map_unreserve(MAP_NR(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_free_page(GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+ db->sgbuf[nr] = p;
+ mem_map_reserve(MAP_NR(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;
+ printk(KERN_DEBUG "dmabuf_init: bytepersec %d bufs %d ossfragshift %d ossmaxfrags %d "
+ "fragshift %d fragsize %d numfrag %d dmasize %d bufsize %d\n",
+ bytepersec, bufs, db->ossfragshift, db->ossmaxfrags, db->fragshift, db->fragsize,
+ db->numfrag, db->dmasize, db->bufsize);
+ return 0;
+}
+
+static int dmabuf_mmap(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++) {
+ if (remap_page_range(start, virt_to_phys(db->sgbuf[nr]), 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;
+
+ 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;
+ (char *)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;
+
+ 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;
+ (char *)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 *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;
+ copy_from_user_ret((db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), buffer, pgrem, -EFAULT);
+ size -= pgrem;
+ (char *)buffer += pgrem;
+ ptr += pgrem;
+ if (ptr >= db->dmasize)
+ ptr = 0;
+ }
+}
+
+static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void *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;
+ copy_to_user_ret(buffer, (db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), pgrem, -EFAULT);
+ size -= pgrem;
+ (char *)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;
+
+ spin_lock_irqsave(&as->lock, flags);
+ u->flags &= ~FLG_RUNNING;
+ i = u->flags;
+ spin_unlock_irqrestore(&as->lock, flags);
+ while (i & (FLG_ID0RUNNING|FLG_ID1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
+ schedule_timeout(1);
+ spin_lock_irqsave(&as->lock, flags);
+ i = u->flags;
+ spin_unlock_irqrestore(&as->lock, flags);
+ }
+ if (u->dataiso[0])
+ usb_free_isoc(u->dataiso[0]);
+ if (u->dataiso[1])
+ usb_free_isoc(u->dataiso[1]);
+ if (u->synciso[0])
+ usb_free_isoc(u->synciso[0]);
+ if (u->synciso[1])
+ usb_free_isoc(u->synciso[1]);
+ u->dataiso[0] = u->dataiso[1] = u->synciso[0] = u->synciso[1] = NULL;
+}
+
+static void usbin_release(struct usb_audiodev *as)
+{
+ struct usbin *u = &as->usbin;
+
+ usbin_stop(as);
+ if (u->data[0])
+ free_page((unsigned long)u->data[0]);
+ if (u->data[1])
+ free_page((unsigned long)u->data[1]);
+ if (u->syncdata[0])
+ free_page((unsigned long)u->syncdata[0]);
+ if (u->syncdata[1])
+ free_page((unsigned long)u->syncdata[1]);
+ u->data[0] = u->data[1] = u->syncdata[0] = u->syncdata[1] = NULL;
+}
+
+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, cnt, i;
+ __s16 *sp, *sp2, s;
+ unsigned char *bp;
+
+ 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;
+ cnt = scnt;
+ if (AFMT_ISSTEREO(u->format))
+ cnt <<= 1;
+ sp = tmp.s + cnt;
+ switch (u->format & ~AFMT_STEREO) {
+ case AFMT_U8:
+ for (bp = buffer+cnt, i = 0; i < cnt; i++) {
+ bp--;
+ sp--;
+ *sp = (*bp ^ 0x80) << 8;
+ }
+ break;
+
+ case AFMT_S8:
+ for (bp = buffer+cnt, i = 0; i < cnt; i++) {
+ bp--;
+ sp--;
+ *sp = *bp << 8;
+ }
+ break;
+
+ case AFMT_U16_LE:
+ for (bp = buffer+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = (bp[0] | (bp[1] << 8)) ^ 0x8000;
+ }
+ break;
+
+ case AFMT_U16_BE:
+ for (bp = buffer+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = (bp[1] | (bp[0] << 8)) ^ 0x8000;
+ }
+ break;
+
+ case AFMT_S16_LE:
+ for (bp = buffer+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = bp[0] | (bp[1] << 8);
+ }
+ break;
+
+ case AFMT_S16_BE:
+ for (bp = buffer+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = bp[1] | (bp[0] << 8);
+ }
+ break;
+ }
+ if (!AFMT_ISSTEREO(u->format) && AFMT_ISSTEREO(u->dma.format)) {
+ /* expand from mono to stereo */
+ for (sp = tmp.s+scnt, sp2 = tmp.s+2*scnt, i = 0; i < scnt; i++) {
+ sp--;
+ sp2 -= 2;
+ sp2[0] = sp2[1] = sp[0];
+ }
+ }
+ if (AFMT_ISSTEREO(u->format) && !AFMT_ISSTEREO(u->dma.format)) {
+ /* contract from stereo to mono */
+ for (sp = sp2 = tmp.s, i = 0; i < scnt; i++, sp++, sp2 += 2)
+ sp[0] = (sp2[0] + sp2[1]) >> 1;
+ }
+ cnt = scnt;
+ if (AFMT_ISSTEREO(u->dma.format))
+ cnt <<= 1;
+ sp = tmp.s;
+ bp = tmp.b;
+ switch (u->dma.format & ~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;
+ }
+ dmabuf_copyin(&u->dma, tmp.b, scnt << dfmtsh);
+ buffer += scnt << ufmtsh;
+ samples -= scnt;
+ }
+}
+
+static int usbin_prepare_desc(struct usbin *u, struct usb_isoc_desc *id)
+{
+ unsigned int i, maxsize;
+
+ maxsize = (u->freqn + 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 = 0; i < DESCFRAMES; i++)
+ id->frames[i].frame_length = maxsize;
+ 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 usb_isoc_desc *id)
+{
+ unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, dmafree, maxsize;
+ unsigned char *cp = id->data;
+
+ ufmtsh = AFMT_BYTESSHIFT(u->format);
+ maxsize = (u->freqn + 0x3fff) >> (14 - ufmtsh);
+ dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
+ for (i = 0; i < DESCFRAMES; i++, cp += maxsize) {
+ if (id->frames[i].frame_status) {
+ printk(KERN_DEBUG "usbin_retire_desc: frame %u status %d\n", i, id->frames[i].frame_status);
+ continue;
+ }
+ scnt = id->frames[i].frame_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 */
+ dmabuf_copyin(&u->dma, cp, cnt);
+ } else {
+ /* we need sampling format conversion */
+ 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 int usbin_completed(int status, void *__buffer, int rval, void *dev_id)
+{
+#if 0
+ struct usb_isoc_desc *id = (struct usb_isoc_desc *)dev_id;
+ struct usb_audiodev *as = (struct usb_audiodev *)id->context;
+#else
+ struct usb_audiodev *as = (struct usb_audiodev *)dev_id;
+ struct usb_isoc_desc *id;
+#endif
+ struct usbin *u = &as->usbin;
+ unsigned int next, idmask;
+
+ printk(KERN_DEBUG "usbin_completed: status %d rval %d flags 0x%x\n", status, rval, u->flags);
+ spin_lock(&as->lock);
+ next = !(u->flags & FLG_NEXTID);
+ idmask = FLG_ID1RUNNING >> next;
+ u->flags = (u->flags & ~(FLG_NEXTID | idmask)) | next;
+ id = u->dataiso[!next];
+ if (!usbin_retire_desc(u, id) &&
+ u->flags & FLG_RUNNING &&
+ !usbin_prepare_desc(u, id) &&
+ !usb_run_isoc(id, u->dataiso[next])) {
+ u->flags |= idmask;
+ } else {
+ u->flags &= ~FLG_RUNNING;
+ printk(KERN_DEBUG "usbin_completed: descriptor not restarted\n");
+ }
+ spin_unlock(&as->lock);
+ return 0;
+}
+
+/*
+ * we output sync data
+ */
+static int usbin_sync_prepare_desc(struct usbin *u, struct usb_isoc_desc *id)
+{
+ unsigned char *cp = id->data;
+ unsigned int i;
+
+ for (i = 0; i < DESCFRAMES; i++, cp += 3) {
+ id->frames[i].frame_length = 3;
+ cp[0] = u->freqn;
+ cp[1] = u->freqn >> 8;
+ cp[2] = u->freqn >> 16;
+ }
+ return 0;
+}
+
+/*
+ * return value: 0 if descriptor should be restarted, -1 otherwise
+ */
+static int usbin_sync_retire_desc(struct usbin *u, struct usb_isoc_desc *id)
+{
+ unsigned int i;
+
+ for (i = 0; i < DESCFRAMES; i++) {
+ if (id->frames[i].frame_status) {
+ printk(KERN_DEBUG "usbin_sync_retire_desc: frame %u status %d\n", i, id->frames[i].frame_status);
+ continue;
+ }
+ }
+ return 0;
+}
+
+static int usbin_sync_completed(int status, void *__buffer, int rval, void *dev_id)
+{
+#if 0
+ struct usb_isoc_desc *id = (struct usb_isoc_desc *)dev_id;
+ struct usb_audiodev *as = (struct usb_audiodev *)id->context;
+#else
+ struct usb_audiodev *as = (struct usb_audiodev *)dev_id;
+ struct usb_isoc_desc *id;
+#endif
+ struct usbin *u = &as->usbin;
+ unsigned int next, idmask;
+
+ printk(KERN_DEBUG "usbin_sync_completed: status %d rval %d flags 0x%x\n", status, rval, u->flags);
+ spin_lock(&as->lock);
+ next = !(u->flags & FLG_SYNCNEXTID);
+ idmask = FLG_SYNC1RUNNING >> next;
+ u->flags = (u->flags & ~(FLG_SYNCNEXTID | idmask)) | (-next & FLG_SYNCNEXTID);
+ id = u->synciso[!next];
+ if (!usbin_sync_retire_desc(u, id) &&
+ u->flags & FLG_RUNNING &&
+ !usbin_sync_prepare_desc(u, id) &&
+ !usb_run_isoc(id, u->synciso[next])) {
+ u->flags |= idmask;
+ } else {
+ u->flags &= ~FLG_RUNNING;
+ printk(KERN_DEBUG "usbin_sync_completed: descriptor not restarted\n");
+ }
+ spin_unlock(&as->lock);
+ return 0;
+}
+
+static void usbin_start(struct usb_audiodev *as)
+{
+ struct usb_device *dev = as->state->usbdev;
+ struct usbin *u = &as->usbin;
+ struct usb_isoc_desc *id;
+ unsigned long flags;
+ unsigned int which, i;
+
+ printk(KERN_DEBUG "usbin_start: device %d ufmt %d dfmt %d srate %d\n",
+ dev->devnum, u->format, u->dma.format, u->dma.srate);
+ /* allocate USB storage if not already done */
+ /* UHCI wants the data to be page aligned - this is silly */
+ if (!u->data[0])
+ u->data[0] = (void *)get_free_page(GFP_KERNEL);
+ if (!u->data[1])
+ u->data[1] = (void *)get_free_page(GFP_KERNEL);
+ if (!u->dataiso[0] && usb_init_isoc(dev, u->datapipe, DESCFRAMES, as, u->dataiso+0)) {
+ printk(KERN_ERR "usbaudio: cannot init isoc descriptor device %d pipe 0x%08x\n",
+ dev->devnum, u->datapipe);
+ u->dataiso[0] = NULL;
+ }
+ if (!u->dataiso[1] && usb_init_isoc(dev, u->datapipe, DESCFRAMES, as, u->dataiso+1)) {
+ printk(KERN_ERR "usbaudio: cannot init isoc descriptor device %d pipe 0x%08x\n",
+ dev->devnum, u->datapipe);
+ u->dataiso[1] = NULL;
+ }
+ if (u->syncpipe) {
+ if (!u->syncdata[0])
+ u->syncdata[0] = (void *)get_free_page(GFP_KERNEL);
+ if (!u->syncdata[1])
+ u->syncdata[1] = (void *)get_free_page(GFP_KERNEL);
+ if (!u->synciso[0] && usb_init_isoc(dev, u->syncpipe, DESCFRAMES, as, u->synciso+0)) {
+ printk(KERN_ERR "usbaudio: cannot init isoc descriptor device %d pipe 0x%08x\n",
+ dev->devnum, u->syncpipe);
+ u->synciso[0] = NULL;
+ }
+ if (!u->synciso[1] && usb_init_isoc(dev, u->syncpipe, DESCFRAMES, as, u->synciso+1)) {
+ printk(KERN_ERR "usbaudio: cannot init isoc descriptor device %d pipe 0x%08x\n",
+ dev->devnum, u->syncpipe);
+ u->synciso[1] = NULL;
+ }
+ }
+ if (!u->data[0] || !u->data[1] || !u->dataiso[0] || !u->dataiso[1] ||
+ (u->syncpipe && (!u->syncdata[0] || !u->syncdata[1] || !u->synciso[0] || !u->synciso[1]))) {
+ printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
+ return;
+ }
+ spin_lock_irqsave(&as->lock, flags);
+ if (!(u->flags & FLG_RUNNING)) {
+ u->freqn = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
+ u->phase = 0;
+ }
+ u->flags |= FLG_RUNNING;
+ if (!(u->flags & (FLG_ID0RUNNING|FLG_ID1RUNNING))) {
+ id = u->dataiso[0];
+ id->start_type = START_ASAP;
+ id->start_frame = 0;
+ id->callback_frames = /*0*/DESCFRAMES;
+ id->callback_fn = usbin_completed;
+ id->data = u->data[0];
+ id->buf_size = PAGE_SIZE;
+ u->flags &= ~FLG_NEXTID;
+ if (!usbin_prepare_desc(u, id) && !usb_run_isoc(id, NULL))
+ u->flags |= FLG_ID0RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ i = u->flags & (FLG_ID0RUNNING|FLG_ID1RUNNING);
+ if (u->flags & FLG_RUNNING && (i == FLG_ID0RUNNING || i == FLG_ID1RUNNING)) {
+ which = !(u->flags & FLG_ID1RUNNING);
+ id = u->dataiso[which];
+ id->callback_frames = /*0*/DESCFRAMES;
+ id->callback_fn = usbin_completed;
+ id->data = u->data[which];
+ id->buf_size = PAGE_SIZE;
+ if (!usbin_prepare_desc(u, id) && !usb_run_isoc(id, u->dataiso[!which]))
+ u->flags |= FLG_ID0RUNNING << which;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ if (u->syncpipe) {
+ if (!(u->flags & (FLG_SYNC0RUNNING|FLG_SYNC1RUNNING))) {
+ id = u->synciso[0];
+ id->start_type = START_ASAP;
+ id->start_frame = 0;
+ id->callback_frames = /*0*/DESCFRAMES;
+ id->callback_fn = usbin_sync_completed;
+ id->data = u->syncdata[0];
+ id->buf_size = PAGE_SIZE;
+ u->flags &= ~FLG_SYNCNEXTID;
+ if (!usbin_sync_prepare_desc(u, id) && !usb_run_isoc(id, NULL))
+ u->flags |= FLG_SYNC0RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ i = u->flags & (FLG_SYNC0RUNNING|FLG_SYNC1RUNNING);
+ if (u->flags & FLG_RUNNING && (i == FLG_SYNC0RUNNING || i == FLG_SYNC1RUNNING)) {
+ which = !(u->flags & FLG_SYNC1RUNNING);
+ id = u->synciso[which];
+ id->callback_frames = /*0*/DESCFRAMES;
+ id->callback_fn = usbin_sync_completed;
+ id->data = u->syncdata[which];
+ id->buf_size = PAGE_SIZE;
+ if (!usbin_sync_prepare_desc(u, id) && !usb_run_isoc(id, u->synciso[!which]))
+ u->flags |= FLG_SYNC0RUNNING << which;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+}
+
+static void usbout_stop(struct usb_audiodev *as)
+{
+ struct usbout *u = &as->usbout;
+ unsigned long flags;
+ unsigned int i;
+
+ spin_lock_irqsave(&as->lock, flags);
+ u->flags &= ~FLG_RUNNING;
+ i = u->flags;
+ spin_unlock_irqrestore(&as->lock, flags);
+ while (i & (FLG_ID0RUNNING|FLG_ID1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
+ schedule_timeout(1);
+ spin_lock_irqsave(&as->lock, flags);
+ i = u->flags;
+ spin_unlock_irqrestore(&as->lock, flags);
+ }
+ if (u->dataiso[0])
+ usb_free_isoc(u->dataiso[0]);
+ if (u->dataiso[1])
+ usb_free_isoc(u->dataiso[1]);
+ if (u->synciso[0])
+ usb_free_isoc(u->synciso[0]);
+ if (u->synciso[1])
+ usb_free_isoc(u->synciso[1]);
+ u->dataiso[0] = u->dataiso[1] = u->synciso[0] = u->synciso[1] = NULL;
+}
+
+static void usbout_release(struct usb_audiodev *as)
+{
+ struct usbout *u = &as->usbout;
+
+ usbout_stop(as);
+ if (u->data[0])
+ free_page((unsigned long)u->data[0]);
+ if (u->data[1])
+ free_page((unsigned long)u->data[1]);
+ if (u->syncdata[0])
+ free_page((unsigned long)u->syncdata[0]);
+ if (u->syncdata[1])
+ free_page((unsigned long)u->syncdata[1]);
+ u->data[0] = u->data[1] = u->syncdata[0] = u->syncdata[1] = NULL;
+}
+
+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, cnt, i;
+ __s16 *sp, *sp2, s;
+ unsigned char *bp;
+
+ 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;
+ cnt = scnt;
+ if (AFMT_ISSTEREO(u->dma.format))
+ cnt <<= 1;
+ dmabuf_copyout(&u->dma, tmp.b, scnt << dfmtsh);
+ sp = tmp.s + cnt;
+ switch (u->dma.format & ~AFMT_STEREO) {
+ case AFMT_U8:
+ for (bp = tmp.b+cnt, i = 0; i < cnt; i++) {
+ bp--;
+ sp--;
+ *sp = (*bp ^ 0x80) << 8;
+ }
+ break;
+
+ case AFMT_S8:
+ for (bp = tmp.b+cnt, i = 0; i < cnt; i++) {
+ bp--;
+ sp--;
+ *sp = *bp << 8;
+ }
+ break;
+
+ case AFMT_U16_LE:
+ for (bp = tmp.b+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = (bp[0] | (bp[1] << 8)) ^ 0x8000;
+ }
+ break;
+
+ case AFMT_U16_BE:
+ for (bp = tmp.b+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = (bp[1] | (bp[0] << 8)) ^ 0x8000;
+ }
+ break;
+
+ case AFMT_S16_LE:
+ for (bp = tmp.b+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = bp[0] | (bp[1] << 8);
+ }
+ break;
+
+ case AFMT_S16_BE:
+ for (bp = tmp.b+2*cnt, i = 0; i < cnt; i++) {
+ bp -= 2;
+ sp--;
+ *sp = bp[1] | (bp[0] << 8);
+ }
+ break;
+ }
+ if (!AFMT_ISSTEREO(u->dma.format) && AFMT_ISSTEREO(u->format)) {
+ /* expand from mono to stereo */
+ for (sp = tmp.s+scnt, sp2 = tmp.s+2*scnt, i = 0; i < scnt; i++) {
+ sp--;
+ sp2 -= 2;
+ sp2[0] = sp2[1] = sp[0];
+ }
+ }
+ if (AFMT_ISSTEREO(u->dma.format) && !AFMT_ISSTEREO(u->format)) {
+ /* contract from stereo to mono */
+ for (sp = sp2 = tmp.s, i = 0; i < scnt; i++, sp++, sp2 += 2)
+ sp[0] = (sp2[0] + sp2[1]) >> 1;
+ }
+ cnt = scnt;
+ if (AFMT_ISSTEREO(u->format))
+ cnt <<= 1;
+ sp = tmp.s;
+ bp = buffer;
+ switch (u->format & ~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;
+ }
+ buffer += scnt << ufmtsh;
+ samples -= scnt;
+ }
+}
+
+static int usbout_prepare_desc(struct usbout *u, struct usb_isoc_desc *id)
+{
+ unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt;
+ unsigned char *cp = id->data;
+
+ ufmtsh = AFMT_BYTESSHIFT(u->format);
+ dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
+ for (i = 0; i < DESCFRAMES; i++) {
+ u->phase = (u->phase & 0x3fff) + u->freqm;
+ scnt = u->phase >> 14;
+ if (!scnt) {
+ id->frames[i].frame_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;
+ id->frames[i].frame_length = cnt;
+ cp += cnt;
+ }
+ 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 usb_isoc_desc *id)
+{
+ unsigned int i;
+
+ for (i = 0; i < DESCFRAMES; i++) {
+ if (id->frames[i].frame_status) {
+ printk(KERN_DEBUG "usbout_retire_desc: frame %u status %d\n", i, id->frames[i].frame_status);
+ continue;
+ }
+ }
+ return 0;
+}
+
+static int usbout_completed(int status, void *__buffer, int rval, void *dev_id)
+{
+#if 0
+ struct usb_isoc_desc *id = (struct usb_isoc_desc *)dev_id;
+ struct usb_audiodev *as = (struct usb_audiodev *)id->context;
+#else
+ struct usb_audiodev *as = (struct usb_audiodev *)dev_id;
+ struct usb_isoc_desc *id;
+#endif
+ struct usbout *u = &as->usbout;
+ unsigned int next, idmask;
+
+ printk(KERN_DEBUG "usbout_completed: status %d rval %d flags 0x%x\n", status, rval, u->flags);
+ spin_lock(&as->lock);
+ next = !(u->flags & FLG_NEXTID);
+ idmask = FLG_ID1RUNNING >> next;
+ u->flags = (u->flags & ~(FLG_NEXTID | idmask)) | next;
+ id = u->dataiso[!next];
+ if (!usbout_retire_desc(u, id) &&
+ u->flags & FLG_RUNNING &&
+ !usbout_prepare_desc(u, id) &&
+ !usb_run_isoc(id, u->dataiso[next])) {
+ u->flags |= idmask;
+ } else {
+ u->flags &= ~FLG_RUNNING;
+ printk(KERN_DEBUG "usbout_completed: descriptor not restarted\n");
+ }
+ spin_unlock(&as->lock);
+ return 0;
+}
+
+static int usbout_sync_prepare_desc(struct usbout *u, struct usb_isoc_desc *id)
+{
+ unsigned int i;
+
+ for (i = 0; i < DESCFRAMES; i++)
+ id->frames[i].frame_length = 3;
+ return 0;
+}
+
+/*
+ * return value: 0 if descriptor should be restarted, -1 otherwise
+ */
+static int usbout_sync_retire_desc(struct usbout *u, struct usb_isoc_desc *id)
+{
+ unsigned char *cp = id->data;
+ unsigned int i, f;
+
+ for (i = 0; i < DESCFRAMES; i++, cp += 3) {
+ if (id->frames[i].frame_status) {
+ printk(KERN_DEBUG "usbout_sync_retire_desc: frame %u status %d\n", i, id->frames[i].frame_status);
+ continue;
+ }
+ if (id->frames[i].frame_length < 3) {
+ printk(KERN_DEBUG "usbout_sync_retire_desc: frame %u length %d\n", i, id->frames[i].frame_length);
+ continue;
+ }
+ f = cp[0] | (cp[1] << 8) | (cp[2] << 16);
+ if (abs(f - u->freqn) > (u->freqn >> 3)) {
+ 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 int usbout_sync_completed(int status, void *__buffer, int rval, void *dev_id)
+{
+#if 0
+ struct usb_isoc_desc *id = (struct usb_isoc_desc *)dev_id;
+ struct usb_audiodev *as = (struct usb_audiodev *)id->context;
+#else
+ struct usb_audiodev *as = (struct usb_audiodev *)dev_id;
+ struct usb_isoc_desc *id;
+#endif
+ struct usbout *u = &as->usbout;
+ unsigned int next, idmask;
+
+ printk(KERN_DEBUG "usbout_sync_completed: status %d rval %d flags 0x%x\n", status, rval, u->flags);
+ spin_lock(&as->lock);
+ next = !(u->flags & FLG_SYNCNEXTID);
+ idmask = FLG_SYNC1RUNNING >> next;
+ u->flags = (u->flags & ~(FLG_SYNCNEXTID | idmask)) | (-next & FLG_SYNCNEXTID);
+ id = u->synciso[!next];
+ if (!usbout_sync_retire_desc(u, id) &&
+ u->flags & FLG_RUNNING &&
+ !usbout_sync_prepare_desc(u, id) &&
+ !usb_run_isoc(id, u->synciso[next])) {
+ u->flags |= idmask;
+ } else {
+ u->flags &= ~FLG_RUNNING;
+ printk(KERN_DEBUG "usbout_sync_completed: descriptor not restarted\n");
+ }
+ spin_unlock(&as->lock);
+ return 0;
+}
+
+static void usbout_start(struct usb_audiodev *as)
+{
+ struct usb_device *dev = as->state->usbdev;
+ struct usbout *u = &as->usbout;
+ struct usb_isoc_desc *id;
+ unsigned long flags;
+ unsigned int which, i;
+
+ printk(KERN_DEBUG "usbout_start: device %d ufmt %d dfmt %d srate %d\n",
+ dev->devnum, u->format, u->dma.format, u->dma.srate);
+ /* allocate USB storage if not already done */
+ /* UHCI wants the data to be page aligned - this is silly */
+ if (!u->data[0])
+ u->data[0] = (void *)get_free_page(GFP_KERNEL);
+ if (!u->data[1])
+ u->data[1] = (void *)get_free_page(GFP_KERNEL);
+ if (!u->dataiso[0] && usb_init_isoc(dev, u->datapipe, DESCFRAMES, as, u->dataiso+0)) {
+ printk(KERN_ERR "usbaudio: cannot init isoc descriptor device %d pipe 0x%08x\n",
+ dev->devnum, u->datapipe);
+ u->dataiso[0] = NULL;
+ }
+ if (!u->dataiso[1] && usb_init_isoc(dev, u->datapipe, DESCFRAMES, as, u->dataiso+1)) {
+ printk(KERN_ERR "usbaudio: cannot init isoc descriptor device %d pipe 0x%08x\n",
+ dev->devnum, u->datapipe);
+ u->dataiso[1] = NULL;
+ }
+ if (u->syncpipe) {
+ if (!u->syncdata[0])
+ u->syncdata[0] = (void *)get_free_page(GFP_KERNEL);
+ if (!u->syncdata[1])
+ u->syncdata[1] = (void *)get_free_page(GFP_KERNEL);
+ if (!u->synciso[0] && usb_init_isoc(dev, u->syncpipe, DESCFRAMES, as, u->synciso+0)) {
+ printk(KERN_ERR "usbaudio: cannot init isoc descriptor device %d pipe 0x%08x\n",
+ dev->devnum, u->syncpipe);
+ u->synciso[0] = NULL;
+ }
+ if (!u->synciso[1] && usb_init_isoc(dev, u->syncpipe, DESCFRAMES, as, u->synciso+1)) {
+ printk(KERN_ERR "usbaudio: cannot init isoc descriptor device %d pipe 0x%08x\n",
+ dev->devnum, u->syncpipe);
+ u->synciso[1] = NULL;
+ }
+ }
+ if (!u->data[0] || !u->data[1] || !u->dataiso[0] || !u->dataiso[1] ||
+ (u->syncpipe && (!u->syncdata[0] || !u->syncdata[1] || !u->synciso[0] || !u->synciso[1]))) {
+ printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
+ return;
+ }
+ spin_lock_irqsave(&as->lock, flags);
+ if (!(u->flags & FLG_RUNNING)) {
+ u->freqn = u->freqm = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
+ u->phase = 0;
+ }
+ u->flags |= FLG_RUNNING;
+ if (!(u->flags & (FLG_ID0RUNNING|FLG_ID1RUNNING))) {
+ id = u->dataiso[0];
+ id->start_type = START_ASAP;
+ id->start_frame = 0;
+ id->callback_frames = /*0*/DESCFRAMES;
+ id->callback_fn = usbout_completed;
+ id->data = u->data[0];
+ id->buf_size = PAGE_SIZE;
+ u->flags &= ~FLG_NEXTID;
+ if (!usbout_prepare_desc(u, id) && !usb_run_isoc(id, NULL))
+ u->flags |= FLG_ID0RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ i = u->flags & (FLG_ID0RUNNING|FLG_ID1RUNNING);
+ if (u->flags & FLG_RUNNING && (i == FLG_ID0RUNNING || i == FLG_ID1RUNNING)) {
+ which = !(u->flags & FLG_ID1RUNNING);
+ id = u->dataiso[which];
+ id->callback_frames = /*0*/DESCFRAMES;
+ id->callback_fn = usbout_completed;
+ id->data = u->data[which];
+ id->buf_size = PAGE_SIZE;
+ if (!usbout_prepare_desc(u, id) && !usb_run_isoc(id, u->dataiso[!which]))
+ u->flags |= FLG_ID0RUNNING << which;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ if (u->syncpipe) {
+ if (!(u->flags & (FLG_SYNC0RUNNING|FLG_SYNC1RUNNING))) {
+ id = u->synciso[0];
+ id->start_type = START_ASAP;
+ id->start_frame = 0;
+ id->callback_frames = /*0*/DESCFRAMES;
+ id->callback_fn = usbout_sync_completed;
+ id->data = u->syncdata[0];
+ id->buf_size = PAGE_SIZE;
+ u->flags &= ~FLG_NEXTID;
+ if (!usbout_sync_prepare_desc(u, id) && !usb_run_isoc(id, NULL))
+ u->flags |= FLG_SYNC0RUNNING;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ i = u->flags & (FLG_SYNC0RUNNING|FLG_SYNC1RUNNING);
+ if (u->flags & FLG_RUNNING && (i == FLG_SYNC0RUNNING || i == FLG_SYNC1RUNNING)) {
+ which = !(u->flags & FLG_SYNC1RUNNING);
+ id = u->synciso[which];
+ id->callback_frames = /*0*/DESCFRAMES;
+ id->callback_fn = usbout_sync_completed;
+ id->data = u->syncdata[which];
+ id->buf_size = PAGE_SIZE;
+ if (!usbout_sync_prepare_desc(u, id) && !usb_run_isoc(id, u->synciso[!which]))
+ u->flags |= FLG_SYNC0RUNNING << which;
+ else
+ u->flags &= ~FLG_RUNNING;
+ }
+ }
+ spin_unlock_irqrestore(&as->lock, flags);
+}
+
+/* --------------------------------------------------------------------- */
+
+static unsigned int find_format(struct audioformat *afp, unsigned int nr, unsigned int fmt)
+{
+ unsigned int i;
+
+ /* first find an exact match */
+ for (i = 0; i < nr; i++)
+ if (afp[i].format == fmt)
+ return i;
+ /* second find a match with the same stereo/mono and 8bit/16bit property */
+ for (i = 0; i < nr; i++)
+ if (!AFMT_ISSTEREO(afp[i].format) == !AFMT_ISSTEREO(fmt) &&
+ !AFMT_IS16BIT(afp[i].format) == !AFMT_IS16BIT(fmt))
+ return i;
+ /* third find a match with the same number of channels */
+ for (i = 0; i < nr; i++)
+ if (!AFMT_ISSTEREO(afp[i].format) == !AFMT_ISSTEREO(fmt))
+ return i;
+ /* return anything */
+ return 0;
+}
+
+static int set_format_in(struct usb_audiodev *as)
+{
+ struct usb_device *dev = as->state->usbdev;
+ struct usb_config_descriptor *config = dev->actconfig;
+ struct usb_interface_descriptor *alts;
+ struct usb_interface *iface;
+ struct usbin *u = &as->usbin;
+ struct dmabuf *d = &u->dma;
+ struct audioformat *fmt;
+ unsigned int fmtnr;
+ unsigned char data[3];
+
+ if (u->interface < 0 || u->interface >= config->bNumInterfaces)
+ return 0;
+ iface = &config->interface[u->interface];
+ fmtnr = find_format(as->fmtin, as->numfmtin, d->format);
+ fmt = as->fmtin + fmtnr;
+ alts = &iface->altsetting[fmt->altsetting];
+ u->format = fmt->format;
+ u->datapipe = usb_rcvisocpipe(dev, alts->endpoint[0].bEndpointAddress & 0xf);
+ u->syncpipe = u->syncinterval = 0;
+ if ((alts->endpoint[0].bmAttributes & 0x0c) == 0x08) {
+ if (alts->bNumEndpoints < 2 ||
+ alts->endpoint[1].bmAttributes != 0x01 ||
+ alts->endpoint[1].bSynchAddress == 0 ||
+ alts->endpoint[1].bEndpointAddress != (alts->endpoint[0].bSynchAddress & 0x7f)) {
+ printk(KERN_ERR "usb_audio: device %d interface %d altsetting %d invalid synch pipe\n",
+ dev->devnum, u->interface, fmt->altsetting);
+ return -1;
+ }
+ u->syncpipe = usb_sndisocpipe(dev, alts->endpoint[1].bEndpointAddress & 0xf);
+ u->syncinterval = alts->endpoint[1].bRefresh;
+ }
+ if (d->srate < fmt->sratelo)
+ d->srate = fmt->sratelo;
+ if (d->srate > fmt->sratehi)
+ d->srate = fmt->sratehi;
+ 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;
+ data[0] = d->srate;
+ data[1] = d->srate >> 8;
+ data[2] = d->srate >> 16;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
+ SAMPLING_FREQ_CONTROL << 8, usb_pipeendpoint(u->datapipe), data, 3, HZ) != 3) {
+ printk(KERN_ERR "usbaudio: failure to set sampling frequency device %d endpoint %d\n",
+ dev->devnum, usb_pipeendpoint(u->datapipe));
+ return -1;
+ }
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
+ SAMPLING_FREQ_CONTROL << 8, usb_pipeendpoint(u->datapipe), data, 3, HZ) != 3) {
+ printk(KERN_ERR "usbaudio: failure to get sampling frequency device %d endpoint %d\n",
+ dev->devnum, usb_pipeendpoint(u->datapipe));
+ return -1;
+ }
+ d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
+ return 0;
+}
+
+static int set_format_out(struct usb_audiodev *as)
+{
+ struct usb_device *dev = as->state->usbdev;
+ struct usb_config_descriptor *config = dev->actconfig;
+ struct usb_interface_descriptor *alts;
+ struct usb_interface *iface;
+ struct usbout *u = &as->usbout;
+ struct dmabuf *d = &u->dma;
+ struct audioformat *fmt;
+ unsigned int fmtnr;
+ unsigned char data[3];
+
+ if (u->interface < 0 || u->interface >= config->bNumInterfaces)
+ return 0;
+ iface = &config->interface[u->interface];
+ fmtnr = find_format(as->fmtout, as->numfmtout, d->format);
+ fmt = as->fmtout + fmtnr;
+ u->format = fmt->format;
+ alts = &iface->altsetting[fmt->altsetting];
+ u->datapipe = usb_sndisocpipe(dev, alts->endpoint[0].bEndpointAddress & 0xf);
+ u->syncpipe = u->syncinterval = 0;
+ if ((alts->endpoint[0].bmAttributes & 0x0c) == 0x04) {
+ if (alts->bNumEndpoints < 2 ||
+ alts->endpoint[1].bmAttributes != 0x01 ||
+ alts->endpoint[1].bSynchAddress == 0 ||
+ alts->endpoint[1].bEndpointAddress != (alts->endpoint[0].bSynchAddress | 0x80)) {
+ printk(KERN_ERR "usb_audio: device %d interface %d altsetting %d invalid synch pipe\n",
+ dev->devnum, u->interface, fmt->altsetting);
+ return -1;
+ }
+ u->syncpipe = usb_rcvisocpipe(dev, alts->endpoint[1].bEndpointAddress & 0xf);
+ u->syncinterval = alts->endpoint[1].bRefresh;
+ }
+ if (d->srate < fmt->sratelo)
+ d->srate = fmt->sratelo;
+ if (d->srate > fmt->sratehi)
+ d->srate = fmt->sratehi;
+ 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;
+ data[0] = d->srate;
+ data[1] = d->srate >> 8;
+ data[2] = d->srate >> 16;
+ if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
+ SAMPLING_FREQ_CONTROL << 8, usb_pipeendpoint(u->datapipe), data, 3, HZ) != 3) {
+ printk(KERN_ERR "usbaudio: failure to set sampling frequency device %d endpoint %d\n",
+ dev->devnum, usb_pipeendpoint(u->datapipe));
+ return -1;
+ }
+ if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
+ SAMPLING_FREQ_CONTROL << 8, usb_pipeendpoint(u->datapipe), data, 3, HZ) != 3) {
+ printk(KERN_ERR "usbaudio: failure to get sampling frequency device %d endpoint %d\n",
+ dev->devnum, usb_pipeendpoint(u->datapipe));
+ return -1;
+ }
+ d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
+ 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, HZ) < 2)
+ 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, HZ) < 2)
+ 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, HZ) < 2)
+ goto err;
+ if (ch->chnum == 0)
+ 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, HZ) < 2)
+ 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, HZ) < 1)
+ goto err;
+ if (ch->chnum == 0)
+ 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, HZ) < 1)
+ goto err;
+ return 0;
+
+ default:
+ return -1;
+ }
+ return 0;
+
+ err:
+ printk(KERN_ERR "usb_audio: 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;
+}
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * 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);
+ 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);
+ MOD_DEC_USE_COUNT;
+}
+
+extern inline int prog_dmabuf_in(struct usb_audiodev *as)
+{
+ usbin_stop(as);
+ return dmabuf_init(&as->usbin.dma);
+}
+
+extern inline int prog_dmabuf_out(struct usb_audiodev *as)
+{
+ usbout_stop(as);
+ return dmabuf_init(&as->usbout.dma);
+}
-#include "usb.h"
-#define AUDIO_DEBUG 1
+/* --------------------------------------------------------------------- */
-static int usb_audio_probe(struct usb_device *dev);
-static void usb_audio_disconnect(struct usb_device *dev);
-static LIST_HEAD(usb_audio_list);
+static loff_t usb_audio_llseek(struct file *file, loff_t offset, int origin)
+{
+ return -ESPIPE;
+}
-struct usb_audio {
- struct usb_device *dev;
- struct list_head list;
+/* --------------------------------------------------------------------- */
+
+static int usb_audio_open_mixdev(struct inode *inode, struct file *file)
+{
+ int minor = MINOR(inode->i_rdev);
+ struct list_head *devs, *mdevs;
+ struct usb_mixerdev *ms;
+ struct usb_audio_state *s;
+
+ down(&open_sem);
+ for (devs = audiodevs.next; devs != &audiodevs; devs = devs->next) {
+ s = list_entry(devs, struct usb_audio_state, audiodev);
+ for (mdevs = s->mixerlist.next; mdevs != &s->mixerlist; mdevs = mdevs->next) {
+ ms = list_entry(mdevs, struct usb_mixerdev, 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 0;
+}
+
+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 = ms->state;
+
+ down(&open_sem);
+ release(s);
+ 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;
+
+ if (cmd == SOUND_MIXER_INFO) {
+ mixer_info 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 *)arg, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == SOUND_OLD_MIXER_INFO) {
+ _old_mixer_info info;
+ strncpy(info.id, "USB_AUDIO", sizeof(info.id));
+ strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
+ if (copy_to_user((void *)arg, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (cmd == OSS_GETVERSION)
+ return put_user(SOUND_VERSION, (int *)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 */
+ /* don't know how to handle this yet */
+ return put_user(0, (int *)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, (int *)arg);
+
+ case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
+ /* don't know how to handle this yet */
+ return put_user(0, (int *)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(0, (int *)arg);
+
+ case SOUND_MIXER_CAPS:
+ return put_user(0, (int *)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, (int *)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 */
+ get_user_ret(val, (int *)arg, -EFAULT);
+ /* set recording source: val */
+ return 0;
+
+ 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;
+ get_user_ret(val, (int *)arg, -EFAULT);
+ if (wrmixer(ms, j, val))
+ return -EIO;
+ return put_user(ms->ch[j].value, (int *)arg);
+ }
+}
+
+static /*const*/ struct file_operations usb_mixer_fops = {
+ &usb_audio_llseek,
+ NULL, /* read */
+ NULL, /* write */
+ NULL, /* readdir */
+ NULL, /* poll */
+ &usb_audio_ioctl_mixdev,
+ NULL, /* mmap */
+ &usb_audio_open_mixdev,
+ NULL, /* flush */
+ &usb_audio_release_mixdev,
+ NULL, /* fsync */
+ NULL, /* fasync */
+ NULL, /* check_media_change */
+ NULL, /* revalidate */
+ NULL, /* lock */
+};
+
+/* --------------------------------------------------------------------- */
+
+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;
+ __set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&as->usbout.dma.wait, &wait);
+ for (;;) {
+ 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");
+ }
+ 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 *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 (ppos != &file->f_pos)
+ return -ESPIPE;
+ 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;
+ __set_current_state(TASK_INTERRUPTIBLE);
+ 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;
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (cnt > count)
+ cnt = count;
+ if (cnt <= 0) {
+ usbin_start(as);
+ 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 *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 (ppos != &file->f_pos)
+ return -ESPIPE;
+ 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;
+ __set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&as->usbout.dma.wait, &wait);
+ while (count > 0) {
+ 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;
+ spin_unlock_irqrestore(&as->lock, flags);
+ if (cnt > count)
+ cnt = count;
+ if (cnt <= 0) {
+ usbout_start(as);
+ 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;
+ usbout_start(as);
+ }
+ __set_current_state(TASK_RUNNING);
+ remove_wait_queue(&as->usbout.dma.wait, &wait);
+ return ret;
+}
+
+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;
+
+ if (vma->vm_flags & VM_WRITE) {
+ if ((ret = prog_dmabuf_out(as)) != 0)
+ return ret;
+ db = &as->usbout.dma;
+ } else if (vma->vm_flags & VM_READ) {
+ if ((ret = prog_dmabuf_in(as)) != 0)
+ return ret;
+ db = &as->usbin.dma;
+ } else
+ return -EINVAL;
+ if (vma->vm_offset != 0)
+ return -EINVAL;
+ return dmabuf_mmap(db, vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_page_prot);
+}
+
+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;
+ unsigned long flags;
+ audio_buf_info abinfo;
+ count_info cinfo;
+ int val, 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);
+ switch (cmd) {
+ case OSS_GETVERSION:
+ return put_user(SOUND_VERSION, (int *)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, (int *)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:
+ get_user_ret(val, (int *)arg, -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, (int *)arg);
+
+ case SNDCTL_DSP_STEREO:
+ val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
+ if (set_format(as, file->f_mode, val2 | AFMT_STEREO, 0))
+ return -EIO;
+ return 0;
+
+ case SNDCTL_DSP_CHANNELS:
+ get_user_ret(val, (int *)arg, -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, (int *)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, (int *)arg);
+
+ case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
+ get_user_ret(val, (int *)arg, -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, (int *)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, (int *)arg);
+
+ case SNDCTL_DSP_SETTRIGGER:
+ get_user_ret(val, (int *)arg, -EFAULT);
+ if (file->f_mode & FMODE_READ) {
+ if (val & PCM_ENABLE_INPUT) {
+ if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
+ return ret;
+ usbin_start(as);
+ } 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;
+ usbout_start(as);
+ } 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 *)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 *)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, (int *)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);
+ return copy_to_user((void *)arg, &cinfo, sizeof(cinfo));
+
+ 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);
+ return copy_to_user((void *)arg, &cinfo, sizeof(cinfo));
+
+ 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, (int *)arg);
+ }
+ if ((val = prog_dmabuf_in(as)))
+ return val;
+ return put_user(as->usbin.dma.fragsize, (int *)arg);
+
+ case SNDCTL_DSP_SETFRAGMENT:
+ get_user_ret(val, (int *)arg, -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;
+ get_user_ret(val, (int *)arg, -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, (int *)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, (int *)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, (int *)arg);
+
+ case SOUND_PCM_WRITE_FILTER:
+ case SNDCTL_DSP_SETSYNCRO:
+ case SOUND_PCM_READ_FILTER:
+ return -EINVAL;
+ }
+ return -ENOIOCTLCMD;
+}
+
+static int usb_audio_open(struct inode *inode, struct file *file)
+{
+ int minor = MINOR(inode->i_rdev);
+ DECLARE_WAITQUEUE(wait, current);
+ struct list_head *devs, *adevs;
+ struct usb_audiodev *as;
+ struct usb_audio_state *s;
+
+ for (;;) {
+ down(&open_sem);
+ for (devs = audiodevs.next; devs != &audiodevs; devs = devs->next) {
+ s = list_entry(devs, struct usb_audio_state, audiodev);
+ for (adevs = s->audiolist.next; adevs != &s->audiolist; adevs = adevs->next) {
+ as = list_entry(adevs, struct usb_audiodev, 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 0;
+}
+
+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 = as->state;
+
+ 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 (s->usbdev)
+ usb_set_interface(s->usbdev, as->usbout.interface, 0);
+ dmabuf_release(&as->usbout.dma);
+ usbout_release(as);
+ }
+ if (file->f_mode & FMODE_READ) {
+ usbin_stop(as);
+ if (s->usbdev)
+ usb_set_interface(s->usbdev, 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);
+ return 0;
+}
- void *irq_handle;
- unsigned int irqpipe;
+static /*const*/ struct file_operations usb_audio_fops = {
+ &usb_audio_llseek,
+ &usb_audio_read,
+ &usb_audio_write,
+ NULL, /* readdir */
+ &usb_audio_poll,
+ &usb_audio_ioctl,
+ &usb_audio_mmap,
+ &usb_audio_open,
+ NULL, /* flush */
+ &usb_audio_release,
+ NULL, /* fsync */
+ NULL, /* fasync */
+ NULL, /* check_media_change */
+ NULL, /* revalidate */
+ NULL, /* lock */
};
+/* --------------------------------------------------------------------- */
+
+/*
+ * TO DO in order to get to the point of building an OSS interface
+ * structure, let alone playing music..
+ *
+ * Use kmalloc/kfree for the descriptors we build
+ * Write the descriptor->OSS convertor code
+ * Figure how we deal with mixers
+ * Check alternate configurations. For now assume we will find one
+ * zero bandwidth (idle) config and one or more live one pers interface.
+ */
+
+static int usb_audio_probe(struct usb_device *dev);
+static void usb_audio_disconnect(struct usb_device *dev);
+
static struct usb_driver usb_audio_driver = {
"audio",
usb_audio_probe,
@@ -32,7 +2502,7 @@
static int usb_audio_irq(int state, void *buffer, int len, void *dev_id)
{
#if 0
- struct usb_audio *aud = (struct usb_audio *)dev_id;
+ struct usb_audio_device *aud = (struct usb_audio_device *)dev_id;
printk("irq on %p\n", aud);
#endif
@@ -41,107 +2511,943 @@
}
#endif
-static int usb_audio_probe(struct usb_device *dev)
+static void *find_descriptor(void *descstart, unsigned int desclen, void *after,
+ u8 dtype, int iface, int altsetting)
{
- struct usb_interface_descriptor *interface;
- struct usb_audio *aud;
- int i;
- int na=0;
-
- for (i=0; i<dev->config[0].bNumInterfaces; i++) {
- interface = &dev->config->interface[i].altsetting[0];
-
- if (interface->bInterfaceClass != 1)
- continue;
-
- printk(KERN_INFO "USB audio device detected.\n");
-
- switch(interface->bInterfaceSubClass) {
- case 0x01:
- printk(KERN_INFO "audio: control device\n");
- break;
- case 0x02:
- printk(KERN_INFO "audio: streaming\n");
- break;
- case 0x03:
- printk(KERN_INFO "audio: nonstreaming\n");
- break;
+ 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;
}
- na++;
+ p = next;
}
-
- if (!na)
- return -1;
+ return NULL;
+}
- aud = kmalloc(sizeof(struct usb_audio), GFP_KERNEL);
- if (!aud)
- return -1;
+static void *find_csinterface_descriptor(void *descstart, unsigned int desclen, void *after, u8 dsubtype, int iface, int altsetting)
+{
+ unsigned char *p;
- memset(aud, 0, sizeof(*aud));
- aud->dev = dev;
- dev->private = aud;
+ 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;
+}
-/*
- if (usb_set_configuration(dev, dev->config[0].bConfigurationValue)) {
- printk (KERN_INFO "Failed usb_set_configuration: Audio\n");
- break;
+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);
}
- usb_set_protocol(dev, 0);
- usb_set_idle(dev, 0, 0);
-*/
-
-/*
- aud->irqpipe = usb_rcvctrlpipe(dev, endpoint->bEndpointAddress);
- na = usb_request_irq(dev, aud->irqpipe,
- usb_audio_irq, endpoint->bInterval,
- aud, &aud->irq_handle);
- if (na) {
- printk (KERN_WARNING "usb-audio: usb_request_irq failed (0x%x)\n", na);
+ 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_config_descriptor *config = dev->actconfig;
+ struct usb_interface_descriptor *alts;
+ struct usb_interface *iface;
+ struct audioformat *fp;
+ unsigned char *fmt;
+ unsigned int i, j, k, format;
+
+ 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->state = s;
+ as->usbin.interface = asifin;
+ as->usbout.interface = asifout;
+ /* search for input formats */
+ if (asifin >= 0) {
+ iface = &config->interface[asifin];
+ for (i = 0; i < iface->num_altsetting; i++) {
+ alts = &iface->altsetting[i];
+ if (alts->bInterfaceClass != USB_CLASS_AUDIO || alts->bInterfaceSubClass != 2)
+ continue;
+ if (alts->bNumEndpoints < 1) {
+ printk(KERN_ERR "usb_audio: device %u interface %u altsetting %u does not have an endpoint\n",
+ dev->devnum, asifin, i);
+ continue;
+ }
+ if ((alts->endpoint[0].bmAttributes & 0x03) != 0x01 ||
+ !(alts->endpoint[0].bEndpointAddress & 0x80)) {
+ printk(KERN_ERR "usb_audio: 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 "usb_audio: 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 "usb_audio: 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 "usb_audio: 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 "usb_audio: 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 "usb_audio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
+ dev->devnum, asifin, i, fmt[4], fmt[5]);
+ 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);
+ 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);
+ if (k > fp->sratehi)
+ fp->sratehi = k;
+ if (k < fp->sratelo)
+ fp->sratelo = k;
+ }
+ printk(KERN_INFO "usb_audio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u\n",
+ dev->devnum, asifin, i, fp->format, fp->sratelo, fp->sratehi);
+ }
+ }
+ /* search for output formats */
+ if (asifout >= 0) {
+ iface = &config->interface[asifout];
+ for (i = 0; i < iface->num_altsetting; i++) {
+ alts = &iface->altsetting[i];
+ if (alts->bInterfaceClass != USB_CLASS_AUDIO || alts->bInterfaceSubClass != 2)
+ continue;
+ if (alts->bNumEndpoints < 1) {
+ printk(KERN_ERR "usb_audio: device %u interface %u altsetting %u does not have an endpoint\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ if ((alts->endpoint[0].bmAttributes & 0x03) != 0x01 ||
+ (alts->endpoint[0].bEndpointAddress & 0x80)) {
+ printk(KERN_ERR "usb_audio: device %u interface %u altsetting %u first endpoint not isochronous out\n",
+ dev->devnum, asifout, i);
+ continue;
+ }
+ fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifout, i);
+ if (!fmt) {
+ printk(KERN_ERR "usb_audio: 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 "usb_audio: 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);
+ fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifout, i);
+ if (!fmt) {
+ printk(KERN_ERR "usb_audio: 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 "usb_audio: 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 "usb_audio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
+ dev->devnum, asifout, i, fmt[4], fmt[5]);
+ 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);
+ 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);
+ if (k > fp->sratehi)
+ fp->sratehi = k;
+ if (k < fp->sratelo)
+ fp->sratelo = k;
+ }
+ printk(KERN_INFO "usb_audio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u\n",
+ dev->devnum, asifout, i, fp->format, fp->sratelo, fp->sratehi);
+ }
+ }
+ if (as->numfmtin == 0 && as->numfmtout == 0) {
+ kfree(as);
+ return;
+ }
+ if ((as->dev_audio = register_sound_dsp(&usb_audio_fops, -1)) < 0) {
+ printk(KERN_ERR "usb_audio: cannot register dsp\n");
+ kfree(as);
+ return;
+ }
+ /* 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 "usb_audio: invalid OSS mixer channel %u\n", nr);
+ return NULL;
+ }
+ if (!(state->mixchmask & (1 << nr))) {
+ printk(KERN_WARNING "usb_audio: 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) == 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[2];
+ __s16 v1;
+ unsigned int v2, v3;
+
+ if (!state->nrmixch || state->nrmixch > SOUND_MIXER_NRDEVICES)
+ 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, HZ) < 2)
+ 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, HZ) < 2)
+ 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, HZ) < 2)
+ 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, HZ) < 2)
+ 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;
- list_add(&aud->list, &usb_audio_list);
+ /* 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, HZ) < 2)
+ 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, HZ) < 2)
+ 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, HZ) < 2)
+ 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->chnum != 0) {
+ 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, HZ) < 2)
+ 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;
- return 0;
+ 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, HZ) < 1)
+ 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, HZ) < 1)
+ 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, HZ) < 1)
+ 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->chnum != 0) {
+ 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, HZ) < 1)
+ 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;
+ }
+ return;
+
+ err:
+ printk(KERN_ERR "usb_audio: 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--;
}
-static void usb_audio_disconnect(struct usb_device *dev)
+
+static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid);
+
+extern 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] & (1 << (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] & (1 << (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;
+ struct mixerchannel *ch;
+ unsigned int i;
+
+ if (!mixer[4]) {
+ printk(KERN_ERR "usb_audio: unit %u invalid MIXER_UNIT descriptor\n", mixer[3]);
+ return;
+ }
+ if (mixer[4] > SOUND_MIXER_NRDEVICES) {
+ printk(KERN_ERR "usb_audio: 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);
+ if (mixer[0] < 10+mixer[4]+((nroutch * chidx[mixer[4]] + 7) >> 3)) {
+ printk(KERN_ERR "usb_audio: 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(&mixer[9+mixer[4]], 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(&mixer[9+mixer[4]], 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 void usb_audio_selectorunit(struct consmixstate *state, unsigned char *selector)
{
- struct usb_audio *aud = (struct usb_audio*) dev->private;
+ unsigned int chnum, i;
- if (!aud)
+ if (!selector[4]) {
+ printk(KERN_ERR "usb_audio: unit %u invalid SELECTOR_UNIT descriptor\n", selector[3]);
return;
+ }
+ usb_audio_recurseunit(state, selector[5]);
+ chnum = state->nrchannels;
+ for (i = 1; i < selector[4]; i++) {
+ usb_audio_recurseunit(state, selector[5+i]);
+ if (chnum != state->nrchannels) {
+ printk(KERN_ERR "usb_audio: selector unit %u: input pins with varying channel numbers\n", selector[3]);
+ state->termtype = 0;
+ state->chconfig = 0;
+ state->nrchannels = 0;
+ return;
+ }
+ }
+ state->termtype = 0;
+ state->chconfig = 0;
+}
- list_del(&aud->list);
+/* in the future we might try to handle 3D etc. effect units */
- usb_release_irq(aud->dev, aud->irq_handle, aud->irqpipe);
+static void usb_audio_processingunit(struct consmixstate *state, unsigned char *proc)
+{
+ unsigned int i;
- kfree(aud);
- dev->private = NULL;
+ 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);
}
-int usb_audio_init(void)
+static void usb_audio_featureunit(struct consmixstate *state, unsigned char *ftr)
{
- usb_register(&usb_audio_driver);
+ struct mixerchannel *ch;
+ unsigned short chftr, mchftr;
+
+ usb_audio_recurseunit(state, ftr[4]);
+ if (state->nrchannels == 0) {
+ printk(KERN_ERR "usb_audio: feature unit %u source has no channels\n", ftr[3]);
+ return;
+ }
+ if (state->nrchannels > 2)
+ printk(KERN_WARNING "usb_audio: feature unit %u: OSS mixer interface does not support more than 2 channels\n", ftr[3]);
+ if (ftr[0] < 7+ftr[5]*(1+state->nrchannels)) {
+ printk(KERN_ERR "usb_audio: unit %u: invalid FEATURE_UNIT descriptor\n", ftr[3]);
+ return;
+ }
+ mchftr = ftr[6];
+ chftr = ftr[6+ftr[5]];
+ if (state->nrchannels > 1)
+ chftr &= ftr[6+2*ftr[5]];
+ /* 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 = MIXFLG_STEREOIN | MIXFLG_STEREOOUT;
+ 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 = MIXFLG_STEREOIN | MIXFLG_STEREOOUT;
+ prepmixch(state);
+ }
+ } else if (mchftr & 4) {
+ ch = getmixchannel(state, getvolchannel(state));
+ 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 = MIXFLG_STEREOIN | MIXFLG_STEREOOUT;
+ prepmixch(state);
+ }
+ } else if (mchftr & 16) {
+ ch = getmixchannel(state, getvolchannel(state));
+ if (ch) {
+ ch->unitid = ftr[3];
+ ch->selector = TREBLE_CONTROL;
+ ch->chnum = 0;
+ ch->flags = 0;
+ prepmixch(state);
+ }
+ }
+}
+
+static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid)
+{
+ unsigned char *p1;
+
+ if (test_and_set_bit(unitid, &state->unitbitmap)) {
+ printk(KERN_ERR "usb_audio: mixer path recursion detected, unit %d!\n", unitid);
+ return;
+ }
+ p1 = find_audiocontrol_unit(state->buffer, state->buflen, NULL, unitid, state->ctrlif);
+ if (!p1) {
+ printk(KERN_ERR "usb_audio: 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 "usb_audio: 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 "usb_audio: 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 "usb_audio: unit %u: invalid SELECTOR_UNIT descriptor\n", unitid);
+ return;
+ }
+ usb_audio_selectorunit(state, p1);
+ return;
+
+ case FEATURE_UNIT:
+ if (p1[0] < 7 || p1[0] < 7+p1[5]) {
+ printk(KERN_ERR "usb_audio: 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]] || p1[0] < 13+p1[6]+p1[11+p1[6]]+p1[13+p1[6]+p1[11+p1[6]]]) {
+ printk(KERN_ERR "usb_audio: 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 "usb_audio: unit %u: invalid EXTENSION_UNIT descriptor\n", unitid);
+ return;
+ }
+ {
+ unsigned int i;
+
+ for (i = 0; i < p1[6]; i++)
+ usb_audio_recurseunit(state, p1[7+i]);
+ }
+ state->nrchannels = p1[7+p1[6]];
+ state->chconfig = p1[8+p1[6]] | (p1[9+p1[6]] << 8);
+ state->termtype = 0;
+ return;
+
+ default:
+ printk(KERN_ERR "usb_audio: 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_INFO "usb_audio: 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 "usb_audio: 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 "usb_audio: cannot register mixer\n");
+ kfree(ms);
+ return;
+ }
+ list_add_tail(&ms->list, &s->mixerlist);
+}
+
+static int usb_audio_parsecontrol(struct usb_device *dev, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif)
+{
+ struct usb_audio_state *s;
+ struct usb_config_descriptor *config = dev->actconfig;
+ struct usb_interface *iface;
+ unsigned char ifin[USB_MAXINTERFACES], ifout[USB_MAXINTERFACES];
+ unsigned char *p1;
+ unsigned int i, j, numifin = 0, numifout = 0;
+
+ if (!(s = kmalloc(sizeof(struct usb_audio_state), GFP_KERNEL)))
+ return -1;
+ 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 "usb_audio: device %d audiocontrol interface %u no HEADER found\n",
+ dev->devnum, ctrlif);
+ goto ret;
+ }
+ if (p1[0] < 8 + p1[7]) {
+ printk(KERN_ERR "usb_audio: device %d audiocontrol interface %u HEADER error\n",
+ dev->devnum, ctrlif);
+ goto ret;
+ }
+ if (!p1[7])
+ printk(KERN_INFO "usb_audio: 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];
+ if (j >= config->bNumInterfaces) {
+ printk(KERN_ERR "usb_audio: device %d audiocontrol interface %u interface %u does not exist\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ iface = &config->interface[j];
+ if (iface->altsetting[0].bInterfaceClass != USB_CLASS_AUDIO) {
+ printk(KERN_ERR "usb_audio: device %d audiocontrol interface %u interface %u is not an AudioClass interface\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (iface->altsetting[0].bInterfaceSubClass == 3) {
+ printk(KERN_INFO "usb_audio: device %d audiocontrol interface %u interface %u MIDIStreaming not supported\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (iface->altsetting[0].bInterfaceSubClass != 2) {
+ printk(KERN_ERR "usb_audio: device %d audiocontrol interface %u interface %u invalid AudioClass subtype\n",
+ dev->devnum, ctrlif, j);
+ continue;
+ }
+ if (iface->num_altsetting < 2 ||
+ iface->altsetting[0].bNumEndpoints > 0) {
+ printk(KERN_ERR "usb_audio: device %d audiocontrol interface %u altsetting 0 not zero bandwidth\n",
+ dev->devnum, ctrlif);
+ continue;
+ }
+ if (iface->altsetting[1].bNumEndpoints < 1) {
+ printk(KERN_ERR "usb_audio: 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 (iface->altsetting[1].endpoint[0].bEndpointAddress & USB_DIR_IN) {
+ if (numifin < USB_MAXINTERFACES)
+ ifin[numifin++] = j;
+ } else {
+ if (numifout < USB_MAXINTERFACES)
+ ifout[numifout++] = j;
+ }
+ }
+ printk(KERN_INFO "usb_audio: 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 -1;
+ }
+ /* everything successful */
+ dev->private = s;
+ down(&open_sem);
+ list_add_tail(&s->audiodev, &audiodevs);
+ up(&open_sem);
+ MOD_INC_USE_COUNT;
return 0;
}
-/*
- * Support functions for parsing
- */
-
-void usb_audio_interface(struct usb_interface_descriptor *interface, u8 *data)
+/* we only care for the currently active configuration */
+
+static int usb_audio_probe(struct usb_device *dev)
{
-#ifdef AUDIO_DEBUG
- printk(KERN_DEBUG "usb_audio_interface.\n");
-#endif
+ struct usb_config_descriptor *config = dev->actconfig;
+ unsigned char *buffer;
+ unsigned char buf[8];
+ unsigned int i, buflen;
+ int ret;
+
+ for (i = 0; i < config->bNumInterfaces; i++)
+ if (config->interface[i].altsetting[0].bInterfaceClass == USB_CLASS_AUDIO &&
+ config->interface[i].altsetting[0].bInterfaceSubClass == 1) /* audiocontrol interface found */
+ goto audioctrlfound;
+ printk(KERN_DEBUG "usb_audio: vendor id 0x%04x, product id 0x%04x contains no AudioControl interface\n",
+ dev->descriptor.idVendor, dev->descriptor.idProduct);
+ return -1;
+
+ audioctrlfound:
+ /* find which configuration number is active */
+ for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
+ if (dev->config+i == config)
+ goto configfound;
+ printk(KERN_ERR "usb_audio: cannot find active configuration number of device %d\n", dev->devnum);
+ return -1;
+
+ configfound:
+ ret = usb_get_descriptor(dev, USB_DT_CONFIG, i, buf, 8);
+ if (ret) {
+ printk(KERN_ERR "usb_audio: cannot get first 8 bytes of config descriptor %d of device %d\n", i, dev->devnum);
+ return -1;
+ }
+ if (buf[1] != USB_DT_CONFIG || buf[0] < 9) {
+ printk(KERN_ERR "usb_audio: invalid config descriptor %d of device %d\n", i, dev->devnum);
+ return -1;
+ }
+ buflen = buf[2] | (buf[3] << 8);
+ if (!(buffer = kmalloc(buflen, GFP_KERNEL)))
+ return -1;
+ ret = usb_get_descriptor(dev, USB_DT_CONFIG, i, buffer, buflen);
+ if (ret) {
+ kfree(buffer);
+ printk(KERN_ERR "usb_audio: cannot get config descriptor %d of device %d\n", i, dev->devnum);
+ return -1;
+ }
+ /* find first audio control interface; we currently cannot handle more than one */
+ for (i = 0; i < config->bNumInterfaces; i++) {
+ if (config->interface[i].altsetting[0].bInterfaceClass != USB_CLASS_AUDIO ||
+ config->interface[i].altsetting[0].bInterfaceSubClass != 1)
+ continue;
+ /* audiocontrol interface found */
+ if (!usb_audio_parsecontrol(dev, buffer, buflen, i))
+ return 0;
+ }
+ return -1;
}
-void usb_audio_endpoint(struct usb_endpoint_descriptor *interface, u8 *data)
+
+/* a revoke facility would make things simpler */
+
+static void usb_audio_disconnect(struct usb_device *dev)
{
-#ifdef AUDIO_DEBUG
- printk(KERN_DEBUG "usb_audio_interface.\n");
+ struct usb_audio_state *s = (struct usb_audio_state *)dev->private;
+ struct list_head *list;
+ struct usb_audiodev *as;
+ struct usb_mixerdev *ms;
+
+ down(&open_sem);
+ list_del(&s->audiodev);
+ INIT_LIST_HEAD(&s->audiodev);
+ s->usbdev = NULL;
+ /* deregister all audio and mixer devices, so no new processes can open this device */
+ for(list = s->audiolist.next; list != &s->audiolist; list = list->next) {
+ as = list_entry(list, struct usb_audiodev, list);
+ if (as->dev_audio >= 0)
+ unregister_sound_dsp(as->dev_audio);
+ as->dev_audio = -1;
+ }
+ for(list = s->mixerlist.next; list != &s->mixerlist; list = list->next) {
+ ms = list_entry(list, struct usb_mixerdev, list);
+ if (ms->dev_mixer >= 0)
+ unregister_sound_mixer(ms->dev_mixer);
+ }
+#if 0
+ if(aud->irq_handle)
+ usb_release_irq(dev, aud->irq_handle, aud->irqpipe);
+ aud->irq_handle = NULL;
#endif
+ release(s);
+ wake_up(&open_wait);
+ dev->private = NULL;
+}
+
+int usb_audio_init(void)
+{
+ usb_register(&usb_audio_driver);
+ return 0;
}
#ifdef MODULE
@@ -156,4 +3462,3 @@
}
#endif
-
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)