+++ /dev/null
-/*****************************************************************************/
-
-/*
- * audio.c -- USB Audio Class driver
- *
- * Copyright (C) 1999, 2000, 2001, 2003, 2004
- * Alan Cox (alan@lxorguk.ukuu.org.uk)
- * Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * Debugging:
- * Use the 'lsusb' utility to dump the descriptors.
- *
- * 1999-09-07: Alan Cox
- * Parsing Audio descriptor patch
- * 1999-09-08: Thomas Sailer
- * Added OSS compatible data io functions; both parts of the
- * driver remain to be glued together
- * 1999-09-10: Thomas Sailer
- * Beautified the driver. Added sample format conversions.
- * Still not properly glued with the parsing code.
- * The parsing code seems to have its problems btw,
- * Since it parses all available configs but doesn't
- * store which iface/altsetting belongs to which config.
- * 1999-09-20: Thomas Sailer
- * Threw out Alan's parsing code and implemented my own one.
- * You cannot reasonnably linearly parse audio descriptors,
- * especially the AudioClass descriptors have to be considered
- * pointer lists. Mixer parsing untested, due to lack of device.
- * First stab at synch pipe implementation, the Dallas USB DAC
- * wants to use an Asynch out pipe. usb_audio_state now basically
- * only contains lists of mixer and wave devices. We can therefore
- * now have multiple mixer/wave devices per USB device.
- * 1999-10-28: Thomas Sailer
- * Converted to URB API. Fixed a taskstate/wakeup semantics mistake
- * that made the driver consume all available CPU cycles.
- * Now runs stable on UHCI-Acher/Fliegl/Sailer.
- * 1999-10-31: Thomas Sailer
- * Audio can now be unloaded if it is not in use by any mixer
- * or dsp client (formerly you had to disconnect the audio devices
- * from the USB port)
- * Finally, about three months after ordering, my "Maxxtro SPK222"
- * speakers arrived, isn't disdata a great mail order company 8-)
- * Parse class specific endpoint descriptor of the audiostreaming
- * interfaces and take the endpoint attributes from there.
- * Unbelievably, the Philips USB DAC has a sampling rate range
- * of over a decade, yet does not support the sampling rate control!
- * No wonder it sounds so bad, has very audible sampling rate
- * conversion distortion. Don't try to listen to it using
- * decent headphones!
- * "Let's make things better" -> but please Philips start with your
- * own stuff!!!!
- * 1999-11-02: Thomas Sailer
- * It takes the Philips boxes several seconds to acquire synchronisation
- * that means they won't play short sounds. Should probably maintain
- * the ISO datastream even if there's nothing to play.
- * Fix counting the total_bytes counter, RealPlayer G2 depends on it.
- * 1999-12-20: Thomas Sailer
- * Fix bad bug in conversion to per interface probing.
- * disconnect was called multiple times for the audio device,
- * leading to a premature freeing of the audio structures
- * 2000-05-13: Thomas Sailer
- * I don't remember who changed the find_format routine,
- * but the change was completely broken for the Dallas
- * chip. Anyway taking sampling rate into account in find_format
- * is bad and should not be done unless there are devices with
- * completely broken audio descriptors. Unless someone shows
- * me such a descriptor, I will not allow find_format to
- * take the sampling rate into account.
- * Also, the former find_format made:
- * - mpg123 play mono instead of stereo
- * - sox completely fail for wav's with sample rates < 44.1kHz
- * for the Dallas chip.
- * Also fix a rather long standing problem with applications that
- * use "small" writes producing no sound at all.
- * 2000-05-15: Thomas Sailer
- * My fears came true, the Philips camera indeed has pretty stupid
- * audio descriptors.
- * 2000-05-17: Thomas Sailer
- * Nemsoft spotted my stupid last minute change, thanks
- * 2000-05-19: Thomas Sailer
- * Fixed FEATURE_UNIT thinkos found thanks to the KC Technology
- * Xtend device. Basically the driver treated FEATURE_UNIT's sourced
- * by mono terminals as stereo.
- * 2000-05-20: Thomas Sailer
- * SELECTOR support (and thus selecting record channels from the mixer).
- * Somewhat peculiar due to OSS interface limitations. Only works
- * for channels where a "slider" is already in front of it (i.e.
- * a MIXER unit or a FEATURE unit with volume capability).
- * 2000-11-26: Thomas Sailer
- * Workaround for Dallas DS4201. The DS4201 uses PCM8 as format tag for
- * its 8 bit modes, but expects signed data (and should therefore have used PCM).
- * 2001-03-10: Thomas Sailer
- * provide abs function, prevent picking up a bogus kernel macro
- * for abs. Bug report by Andrew Morton <andrewm@uow.edu.au>
- * 2001-06-16: Bryce Nesbitt <bryce@obviously.com>
- * Fix SNDCTL_DSP_STEREO API violation
- * 2003-04-08: Oliver Neukum (oliver@neukum.name):
- * Setting a configuration is done by usbcore and must not be overridden
- * 2004-02-27: Workaround for broken synch descriptors
- * 2004-03-07: Alan Stern <stern@rowland.harvard.edu>
- * Add usb_ifnum_to_if() and usb_altnum_to_altsetting() support.
- * Use the in-memory descriptors instead of reading them from the device.
- *
- */
-
-/*
- * Strategy:
- *
- * Alan Cox and Thomas Sailer are starting to dig at opposite ends and
- * are hoping to meet in the middle, just like tunnel diggers :)
- * Alan tackles the descriptor parsing, Thomas the actual data IO and the
- * OSS compatible interface.
- *
- * Data IO implementation issues
- *
- * A mmap'able ring buffer per direction is implemented, because
- * almost every OSS app expects it. It is however impractical to
- * transmit/receive USB data directly into and out of the ring buffer,
- * due to alignment and synchronisation issues. Instead, the ring buffer
- * feeds a constant time delay line that handles the USB issues.
- *
- * Now we first try to find an alternate setting that exactly matches
- * the sample format requested by the user. If we find one, we do not
- * need to perform any sample rate conversions. If there is no matching
- * altsetting, we choose the closest one and perform sample format
- * conversions. We never do sample rate conversion; these are too
- * expensive to be performed in the kernel.
- *
- * Current status: no known HCD-specific issues.
- *
- * Generally: Due to the brokenness of the Audio Class spec
- * it seems generally impossible to write a generic Audio Class driver,
- * so a reasonable driver should implement the features that are actually
- * used.
- *
- * Parsing implementation issues
- *
- * One cannot reasonably parse the AudioClass descriptors linearly.
- * Therefore the current implementation features routines to look
- * for a specific descriptor in the descriptor list.
- *
- * How does the parsing work? First, all interfaces are searched
- * for an AudioControl class interface. If found, the config descriptor
- * that belongs to the current configuration is searched and
- * the HEADER descriptor is found. It contains a list of
- * all AudioStreaming and MIDIStreaming devices. This list is then walked,
- * and all AudioStreaming interfaces are classified into input and output
- * interfaces (according to the endpoint0 direction in altsetting1) (MIDIStreaming
- * is currently not supported). The input & output list is then used
- * to group inputs and outputs together and issued pairwise to the
- * AudioStreaming class parser. Finally, all OUTPUT_TERMINAL descriptors
- * are walked and issued to the mixer construction routine.
- *
- * The AudioStreaming parser simply enumerates all altsettings belonging
- * to the specified interface. It looks for AS_GENERAL and FORMAT_TYPE
- * class specific descriptors to extract the sample format/sample rate
- * data. Only sample format types PCM and PCM8 are supported right now, and
- * only FORMAT_TYPE_I is handled. The isochronous data endpoint needs to
- * be the first endpoint of the interface, and the optional synchronisation
- * isochronous endpoint the second one.
- *
- * Mixer construction works as follows: The various TERMINAL and UNIT
- * descriptors span a tree from the root (OUTPUT_TERMINAL) through the
- * intermediate nodes (UNITs) to the leaves (INPUT_TERMINAL). We walk
- * that tree in a depth first manner. FEATURE_UNITs may contribute volume,
- * bass and treble sliders to the mixer, MIXER_UNITs volume sliders.
- * The terminal type encoded in the INPUT_TERMINALs feeds a heuristic
- * to determine "meaningful" OSS slider numbers, however we will see
- * how well this works in practice. Other features are not used at the
- * moment, they seem less often used. Also, it seems difficult at least
- * to construct recording source switches from SELECTOR_UNITs, but
- * since there are not many USB ADC's available, we leave that for later.
- */
-
-/*****************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/sched.h>
-#include <linux/smp_lock.h>
-#include <linux/module.h>
-#include <linux/sound.h>
-#include <linux/soundcard.h>
-#include <linux/list.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/bitops.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <linux/usb.h>
-
-#include "audio.h"
-
-/*
- * Version Information
- */
-#define DRIVER_VERSION "v1.0.0"
-#define DRIVER_AUTHOR "Alan Cox <alan@lxorguk.ukuu.org.uk>, Thomas Sailer (sailer@ife.ee.ethz.ch)"
-#define DRIVER_DESC "USB Audio Class driver"
-
-#define AUDIO_DEBUG 1
-
-#define SND_DEV_DSP16 5
-
-#define dprintk(x)
-
-/* --------------------------------------------------------------------- */
-
-/*
- * Linked list of all audio devices...
- */
-static struct list_head audiodevs = LIST_HEAD_INIT(audiodevs);
-static DECLARE_MUTEX(open_sem);
-
-/*
- * wait queue for processes wanting to open an USB audio device
- */
-static DECLARE_WAIT_QUEUE_HEAD(open_wait);
-
-
-#define MAXFORMATS MAX_ALT
-#define DMABUFSHIFT 17 /* 128k worth of DMA buffer */
-#define NRSGBUF (1U<<(DMABUFSHIFT-PAGE_SHIFT))
-
-/*
- * This influences:
- * - Latency
- * - Interrupt rate
- * - Synchronisation behaviour
- * Don't touch this if you don't understand all of the above.
- */
-#define DESCFRAMES 5
-#define SYNCFRAMES DESCFRAMES
-
-#define MIXFLG_STEREOIN 1
-#define MIXFLG_STEREOOUT 2
-
-struct mixerchannel {
- __u16 value;
- __u16 osschannel; /* number of the OSS channel */
- __s16 minval, maxval;
- __u16 slctunitid;
- __u8 unitid;
- __u8 selector;
- __u8 chnum;
- __u8 flags;
-};
-
-struct audioformat {
- unsigned int format;
- unsigned int sratelo;
- unsigned int sratehi;
- unsigned char altsetting;
- unsigned char attributes;
-};
-
-struct dmabuf {
- /* buffer data format */
- unsigned int format;
- unsigned int srate;
- /* physical buffer */
- unsigned char *sgbuf[NRSGBUF];
- unsigned bufsize;
- unsigned numfrag;
- unsigned fragshift;
- unsigned wrptr, rdptr;
- unsigned total_bytes;
- int count;
- unsigned error; /* over/underrun */
- wait_queue_head_t wait;
- /* redundant, but makes calculations easier */
- unsigned fragsize;
- unsigned dmasize;
- /* OSS stuff */
- unsigned mapped:1;
- unsigned ready:1;
- unsigned ossfragshift;
- int ossmaxfrags;
- unsigned subdivision;
-};
-
-struct usb_audio_state;
-
-#define FLG_URB0RUNNING 1
-#define FLG_URB1RUNNING 2
-#define FLG_SYNC0RUNNING 4
-#define FLG_SYNC1RUNNING 8
-#define FLG_RUNNING 16
-#define FLG_CONNECTED 32
-
-struct my_data_urb {
- struct urb *urb;
-};
-
-struct my_sync_urb {
- struct urb *urb;
-};
-
-
-struct usb_audiodev {
- struct list_head list;
- struct usb_audio_state *state;
-
- /* soundcore stuff */
- int dev_audio;
-
- /* wave stuff */
- mode_t open_mode;
- spinlock_t lock; /* DMA buffer access spinlock */
-
- struct usbin {
- int interface; /* Interface number, -1 means not used */
- unsigned int format; /* USB data format */
- unsigned int datapipe; /* the data input pipe */
- unsigned int syncpipe; /* the synchronisation pipe - 0 for anything but adaptive IN mode */
- unsigned int syncinterval; /* P for adaptive IN mode, 0 otherwise */
- unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */
- unsigned int freqmax; /* maximum sampling rate, used for buffer management */
- unsigned int phase; /* phase accumulator */
- unsigned int flags; /* see FLG_ defines */
-
- struct my_data_urb durb[2]; /* ISO descriptors for the data endpoint */
- struct my_sync_urb surb[2]; /* ISO sync pipe descriptor if needed */
-
- struct dmabuf dma;
- } usbin;
-
- struct usbout {
- int interface; /* Interface number, -1 means not used */
- unsigned int format; /* USB data format */
- unsigned int datapipe; /* the data input pipe */
- unsigned int syncpipe; /* the synchronisation pipe - 0 for anything but asynchronous OUT mode */
- unsigned int syncinterval; /* P for asynchronous OUT mode, 0 otherwise */
- unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */
- unsigned int freqm; /* momentary sampling rate in USB format, i.e. fs/1000 in Q10.14 */
- unsigned int freqmax; /* maximum sampling rate, used for buffer management */
- unsigned int phase; /* phase accumulator */
- unsigned int flags; /* see FLG_ defines */
-
- struct my_data_urb durb[2]; /* ISO descriptors for the data endpoint */
- struct my_sync_urb surb[2]; /* ISO sync pipe descriptor if needed */
-
- struct dmabuf dma;
- } usbout;
-
-
- unsigned int numfmtin, numfmtout;
- struct audioformat fmtin[MAXFORMATS];
- struct audioformat fmtout[MAXFORMATS];
-};
-
-struct usb_mixerdev {
- struct list_head list;
- struct usb_audio_state *state;
-
- /* soundcore stuff */
- int dev_mixer;
-
- unsigned char iface; /* interface number of the AudioControl interface */
-
- /* USB format descriptions */
- unsigned int numch, modcnt;
-
- /* mixch is last and gets allocated dynamically */
- struct mixerchannel ch[0];
-};
-
-struct usb_audio_state {
- struct list_head audiodev;
-
- /* USB device */
- struct usb_device *usbdev;
-
- struct list_head audiolist;
- struct list_head mixerlist;
-
- unsigned count; /* usage counter; NOTE: the usb stack is also considered a user */
-};
-
-/* private audio format extensions */
-#define AFMT_STEREO 0x80000000
-#define AFMT_ISSTEREO(x) ((x) & AFMT_STEREO)
-#define AFMT_IS16BIT(x) ((x) & (AFMT_S16_LE|AFMT_S16_BE|AFMT_U16_LE|AFMT_U16_BE))
-#define AFMT_ISUNSIGNED(x) ((x) & (AFMT_U8|AFMT_U16_LE|AFMT_U16_BE))
-#define AFMT_BYTESSHIFT(x) ((AFMT_ISSTEREO(x) ? 1 : 0) + (AFMT_IS16BIT(x) ? 1 : 0))
-#define AFMT_BYTES(x) (1<<AFMT_BYTESSHFIT(x))
-
-/* --------------------------------------------------------------------- */
-
-static inline unsigned ld2(unsigned int x)
-{
- unsigned r = 0;
-
- if (x >= 0x10000) {
- x >>= 16;
- r += 16;
- }
- if (x >= 0x100) {
- x >>= 8;
- r += 8;
- }
- if (x >= 0x10) {
- x >>= 4;
- r += 4;
- }
- if (x >= 4) {
- x >>= 2;
- r += 2;
- }
- if (x >= 2)
- r++;
- return r;
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * OSS compatible ring buffer management. The ring buffer may be mmap'ed into
- * an application address space.
- *
- * I first used the rvmalloc stuff copied from bttv. Alan Cox did not like it, so
- * we now use an array of pointers to a single page each. This saves us the
- * kernel page table manipulations, but we have to do a page table alike mechanism
- * (though only one indirection) in software.
- */
-
-static void dmabuf_release(struct dmabuf *db)
-{
- unsigned int nr;
- void *p;
-
- for(nr = 0; nr < NRSGBUF; nr++) {
- if (!(p = db->sgbuf[nr]))
- continue;
- ClearPageReserved(virt_to_page(p));
- free_page((unsigned long)p);
- db->sgbuf[nr] = NULL;
- }
- db->mapped = db->ready = 0;
-}
-
-static int dmabuf_init(struct dmabuf *db)
-{
- unsigned int nr, bytepersec, bufs;
- void *p;
-
- /* initialize some fields */
- db->rdptr = db->wrptr = db->total_bytes = db->count = db->error = 0;
- /* calculate required buffer size */
- bytepersec = db->srate << AFMT_BYTESSHIFT(db->format);
- bufs = 1U << DMABUFSHIFT;
- if (db->ossfragshift) {
- if ((1000 << db->ossfragshift) < bytepersec)
- db->fragshift = ld2(bytepersec/1000);
- else
- db->fragshift = db->ossfragshift;
- } else {
- db->fragshift = ld2(bytepersec/100/(db->subdivision ? db->subdivision : 1));
- if (db->fragshift < 3)
- db->fragshift = 3;
- }
- db->numfrag = bufs >> db->fragshift;
- while (db->numfrag < 4 && db->fragshift > 3) {
- db->fragshift--;
- db->numfrag = bufs >> db->fragshift;
- }
- db->fragsize = 1 << db->fragshift;
- if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
- db->numfrag = db->ossmaxfrags;
- db->dmasize = db->numfrag << db->fragshift;
- for(nr = 0; nr < NRSGBUF; nr++) {
- if (!db->sgbuf[nr]) {
- p = (void *)get_zeroed_page(GFP_KERNEL);
- if (!p)
- return -ENOMEM;
- db->sgbuf[nr] = p;
- SetPageReserved(virt_to_page(p));
- }
- memset(db->sgbuf[nr], AFMT_ISUNSIGNED(db->format) ? 0x80 : 0, PAGE_SIZE);
- if ((nr << PAGE_SHIFT) >= db->dmasize)
- break;
- }
- db->bufsize = nr << PAGE_SHIFT;
- db->ready = 1;
- dprintk((KERN_DEBUG "usbaudio: dmabuf_init bytepersec %d bufs %d ossfragshift %d ossmaxfrags %d "
- "fragshift %d fragsize %d numfrag %d dmasize %d bufsize %d fmt 0x%x srate %d\n",
- bytepersec, bufs, db->ossfragshift, db->ossmaxfrags, db->fragshift, db->fragsize,
- db->numfrag, db->dmasize, db->bufsize, db->format, db->srate));
- return 0;
-}
-
-static int dmabuf_mmap(struct vm_area_struct *vma, struct dmabuf *db, unsigned long start, unsigned long size, pgprot_t prot)
-{
- unsigned int nr;
-
- if (!db->ready || db->mapped || (start | size) & (PAGE_SIZE-1) || size > db->bufsize)
- return -EINVAL;
- size >>= PAGE_SHIFT;
- for(nr = 0; nr < size; nr++)
- if (!db->sgbuf[nr])
- return -EINVAL;
- db->mapped = 1;
- for(nr = 0; nr < size; nr++) {
- unsigned long pfn;
-
- pfn = virt_to_phys(db->sgbuf[nr]) >> PAGE_SHIFT;
- if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, prot))
- return -EAGAIN;
- start += PAGE_SIZE;
- }
- return 0;
-}
-
-static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int size)
-{
- unsigned int pgrem, rem;
-
- db->total_bytes += size;
- for (;;) {
- if (size <= 0)
- return;
- pgrem = ((~db->wrptr) & (PAGE_SIZE-1)) + 1;
- if (pgrem > size)
- pgrem = size;
- rem = db->dmasize - db->wrptr;
- if (pgrem > rem)
- pgrem = rem;
- memcpy((db->sgbuf[db->wrptr >> PAGE_SHIFT]) + (db->wrptr & (PAGE_SIZE-1)), buffer, pgrem);
- size -= pgrem;
- buffer += pgrem;
- db->wrptr += pgrem;
- if (db->wrptr >= db->dmasize)
- db->wrptr = 0;
- }
-}
-
-static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size)
-{
- unsigned int pgrem, rem;
-
- db->total_bytes += size;
- for (;;) {
- if (size <= 0)
- return;
- pgrem = ((~db->rdptr) & (PAGE_SIZE-1)) + 1;
- if (pgrem > size)
- pgrem = size;
- rem = db->dmasize - db->rdptr;
- if (pgrem > rem)
- pgrem = rem;
- memcpy(buffer, (db->sgbuf[db->rdptr >> PAGE_SHIFT]) + (db->rdptr & (PAGE_SIZE-1)), pgrem);
- size -= pgrem;
- buffer += pgrem;
- db->rdptr += pgrem;
- if (db->rdptr >= db->dmasize)
- db->rdptr = 0;
- }
-}
-
-static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void __user *buffer, unsigned int size)
-{
- unsigned int pgrem, rem;
-
- if (!db->ready || db->mapped)
- return -EINVAL;
- for (;;) {
- if (size <= 0)
- return 0;
- pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
- if (pgrem > size)
- pgrem = size;
- rem = db->dmasize - ptr;
- if (pgrem > rem)
- pgrem = rem;
- if (copy_from_user((db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), buffer, pgrem))
- return -EFAULT;
- size -= pgrem;
- buffer += pgrem;
- ptr += pgrem;
- if (ptr >= db->dmasize)
- ptr = 0;
- }
-}
-
-static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void __user *buffer, unsigned int size)
-{
- unsigned int pgrem, rem;
-
- if (!db->ready || db->mapped)
- return -EINVAL;
- for (;;) {
- if (size <= 0)
- return 0;
- pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
- if (pgrem > size)
- pgrem = size;
- rem = db->dmasize - ptr;
- if (pgrem > rem)
- pgrem = rem;
- if (copy_to_user(buffer, (db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), pgrem))
- return -EFAULT;
- size -= pgrem;
- buffer += pgrem;
- ptr += pgrem;
- if (ptr >= db->dmasize)
- ptr = 0;
- }
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * USB I/O code. We do sample format conversion if necessary
- */
-
-static void usbin_stop(struct usb_audiodev *as)
-{
- struct usbin *u = &as->usbin;
- unsigned long flags;
- unsigned int i, notkilled = 1;
-
- spin_lock_irqsave(&as->lock, flags);
- u->flags &= ~FLG_RUNNING;
- i = u->flags;
- spin_unlock_irqrestore(&as->lock, flags);
- while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
- if (notkilled)
- schedule_timeout_interruptible(1);
- else
- schedule_timeout_uninterruptible(1);
- spin_lock_irqsave(&as->lock, flags);
- i = u->flags;
- spin_unlock_irqrestore(&as->lock, flags);
- if (notkilled && signal_pending(current)) {
- if (i & FLG_URB0RUNNING)
- usb_kill_urb(u->durb[0].urb);
- if (i & FLG_URB1RUNNING)
- usb_kill_urb(u->durb[1].urb);
- if (i & FLG_SYNC0RUNNING)
- usb_kill_urb(u->surb[0].urb);
- if (i & FLG_SYNC1RUNNING)
- usb_kill_urb(u->surb[1].urb);
- notkilled = 0;
- }
- }
- set_current_state(TASK_RUNNING);
- kfree(u->durb[0].urb->transfer_buffer);
- kfree(u->durb[1].urb->transfer_buffer);
- kfree(u->surb[0].urb->transfer_buffer);
- kfree(u->surb[1].urb->transfer_buffer);
- u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
- u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
-}
-
-static inline void usbin_release(struct usb_audiodev *as)
-{
- usbin_stop(as);
-}
-
-static void usbin_disc(struct usb_audiodev *as)
-{
- struct usbin *u = &as->usbin;
-
- unsigned long flags;
-
- spin_lock_irqsave(&as->lock, flags);
- u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
- spin_unlock_irqrestore(&as->lock, flags);
- usbin_stop(as);
-}
-
-static void conversion(const void *ibuf, unsigned int ifmt, void *obuf, unsigned int ofmt, void *tmp, unsigned int scnt)
-{
- unsigned int cnt, i;
- __s16 *sp, *sp2, s;
- unsigned char *bp;
-
- cnt = scnt;
- if (AFMT_ISSTEREO(ifmt))
- cnt <<= 1;
- sp = ((__s16 *)tmp) + cnt;
- switch (ifmt & ~AFMT_STEREO) {
- case AFMT_U8:
- for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
- bp--;
- sp--;
- *sp = (*bp ^ 0x80) << 8;
- }
- break;
-
- case AFMT_S8:
- for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
- bp--;
- sp--;
- *sp = *bp << 8;
- }
- break;
-
- case AFMT_U16_LE:
- for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
- bp -= 2;
- sp--;
- *sp = (bp[0] | (bp[1] << 8)) ^ 0x8000;
- }
- break;
-
- case AFMT_U16_BE:
- for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
- bp -= 2;
- sp--;
- *sp = (bp[1] | (bp[0] << 8)) ^ 0x8000;
- }
- break;
-
- case AFMT_S16_LE:
- for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
- bp -= 2;
- sp--;
- *sp = bp[0] | (bp[1] << 8);
- }
- break;
-
- case AFMT_S16_BE:
- for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
- bp -= 2;
- sp--;
- *sp = bp[1] | (bp[0] << 8);
- }
- break;
- }
- if (!AFMT_ISSTEREO(ifmt) && AFMT_ISSTEREO(ofmt)) {
- /* expand from mono to stereo */
- for (sp = ((__s16 *)tmp)+scnt, sp2 = ((__s16 *)tmp)+2*scnt, i = 0; i < scnt; i++) {
- sp--;
- sp2 -= 2;
- sp2[0] = sp2[1] = sp[0];
- }
- }
- if (AFMT_ISSTEREO(ifmt) && !AFMT_ISSTEREO(ofmt)) {
- /* contract from stereo to mono */
- for (sp = sp2 = ((__s16 *)tmp), i = 0; i < scnt; i++, sp++, sp2 += 2)
- sp[0] = (sp2[0] + sp2[1]) >> 1;
- }
- cnt = scnt;
- if (AFMT_ISSTEREO(ofmt))
- cnt <<= 1;
- sp = ((__s16 *)tmp);
- bp = ((unsigned char *)obuf);
- switch (ofmt & ~AFMT_STEREO) {
- case AFMT_U8:
- for (i = 0; i < cnt; i++, sp++, bp++)
- *bp = (*sp >> 8) ^ 0x80;
- break;
-
- case AFMT_S8:
- for (i = 0; i < cnt; i++, sp++, bp++)
- *bp = *sp >> 8;
- break;
-
- case AFMT_U16_LE:
- for (i = 0; i < cnt; i++, sp++, bp += 2) {
- s = *sp;
- bp[0] = s;
- bp[1] = (s >> 8) ^ 0x80;
- }
- break;
-
- case AFMT_U16_BE:
- for (i = 0; i < cnt; i++, sp++, bp += 2) {
- s = *sp;
- bp[1] = s;
- bp[0] = (s >> 8) ^ 0x80;
- }
- break;
-
- case AFMT_S16_LE:
- for (i = 0; i < cnt; i++, sp++, bp += 2) {
- s = *sp;
- bp[0] = s;
- bp[1] = s >> 8;
- }
- break;
-
- case AFMT_S16_BE:
- for (i = 0; i < cnt; i++, sp++, bp += 2) {
- s = *sp;
- bp[1] = s;
- bp[0] = s >> 8;
- }
- break;
- }
-
-}
-
-static void usbin_convert(struct usbin *u, unsigned char *buffer, unsigned int samples)
-{
- union {
- __s16 s[64];
- unsigned char b[0];
- } tmp;
- unsigned int scnt, maxs, ufmtsh, dfmtsh;
-
- ufmtsh = AFMT_BYTESSHIFT(u->format);
- dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
- maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
- while (samples > 0) {
- scnt = samples;
- if (scnt > maxs)
- scnt = maxs;
- conversion(buffer, u->format, tmp.b, u->dma.format, tmp.b, scnt);
- dmabuf_copyin(&u->dma, tmp.b, scnt << dfmtsh);
- buffer += scnt << ufmtsh;
- samples -= scnt;
- }
-}
-
-static int usbin_prepare_desc(struct usbin *u, struct urb *urb)
-{
- unsigned int i, maxsize, offs;
-
- maxsize = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
- //printk(KERN_DEBUG "usbin_prepare_desc: maxsize %d freq 0x%x format 0x%x\n", maxsize, u->freqn, u->format);
- for (i = offs = 0; i < DESCFRAMES; i++, offs += maxsize) {
- urb->iso_frame_desc[i].length = maxsize;
- urb->iso_frame_desc[i].offset = offs;
- }
- urb->interval = 1;
- return 0;
-}
-
-/*
- * return value: 0 if descriptor should be restarted, -1 otherwise
- * convert sample format on the fly if necessary
- */
-static int usbin_retire_desc(struct usbin *u, struct urb *urb)
-{
- unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, dmafree;
- unsigned char *cp;
-
- ufmtsh = AFMT_BYTESSHIFT(u->format);
- dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
- for (i = 0; i < DESCFRAMES; i++) {
- cp = ((unsigned char *)urb->transfer_buffer) + urb->iso_frame_desc[i].offset;
- if (urb->iso_frame_desc[i].status) {
- dprintk((KERN_DEBUG "usbin_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
- continue;
- }
- scnt = urb->iso_frame_desc[i].actual_length >> ufmtsh;
- if (!scnt)
- continue;
- cnt = scnt << dfmtsh;
- if (!u->dma.mapped) {
- dmafree = u->dma.dmasize - u->dma.count;
- if (cnt > dmafree) {
- scnt = dmafree >> dfmtsh;
- cnt = scnt << dfmtsh;
- err++;
- }
- }
- u->dma.count += cnt;
- if (u->format == u->dma.format) {
- /* we do not need format conversion */
- dprintk((KERN_DEBUG "usbaudio: no sample format conversion\n"));
- dmabuf_copyin(&u->dma, cp, cnt);
- } else {
- /* we need sampling format conversion */
- dprintk((KERN_DEBUG "usbaudio: sample format conversion %x != %x\n", u->format, u->dma.format));
- usbin_convert(u, cp, scnt);
- }
- }
- if (err)
- u->dma.error++;
- if (u->dma.count >= (signed)u->dma.fragsize)
- wake_up(&u->dma.wait);
- return err ? -1 : 0;
-}
-
-static void usbin_completed(struct urb *urb, struct pt_regs *regs)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
- struct usbin *u = &as->usbin;
- unsigned long flags;
- unsigned int mask;
- int suret = 0;
-
-#if 0
- printk(KERN_DEBUG "usbin_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
-#endif
- if (urb == u->durb[0].urb)
- mask = FLG_URB0RUNNING;
- else if (urb == u->durb[1].urb)
- mask = FLG_URB1RUNNING;
- else {
- mask = 0;
- printk(KERN_ERR "usbin_completed: panic: unknown URB\n");
- }
- urb->dev = as->state->usbdev;
- spin_lock_irqsave(&as->lock, flags);
- if (!usbin_retire_desc(u, urb) &&
- u->flags & FLG_RUNNING &&
- !usbin_prepare_desc(u, urb) &&
- (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
- u->flags |= mask;
- } else {
- u->flags &= ~(mask | FLG_RUNNING);
- wake_up(&u->dma.wait);
- printk(KERN_DEBUG "usbin_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret);
- }
- spin_unlock_irqrestore(&as->lock, flags);
-}
-
-/*
- * we output sync data
- */
-static int usbin_sync_prepare_desc(struct usbin *u, struct urb *urb)
-{
- unsigned char *cp = urb->transfer_buffer;
- unsigned int i, offs;
-
- for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3, cp += 3) {
- urb->iso_frame_desc[i].length = 3;
- urb->iso_frame_desc[i].offset = offs;
- cp[0] = u->freqn;
- cp[1] = u->freqn >> 8;
- cp[2] = u->freqn >> 16;
- }
- urb->interval = 1;
- return 0;
-}
-
-/*
- * return value: 0 if descriptor should be restarted, -1 otherwise
- */
-static int usbin_sync_retire_desc(struct usbin *u, struct urb *urb)
-{
- unsigned int i;
-
- for (i = 0; i < SYNCFRAMES; i++)
- if (urb->iso_frame_desc[0].status)
- dprintk((KERN_DEBUG "usbin_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
- return 0;
-}
-
-static void usbin_sync_completed(struct urb *urb, struct pt_regs *regs)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
- struct usbin *u = &as->usbin;
- unsigned long flags;
- unsigned int mask;
- int suret = 0;
-
-#if 0
- printk(KERN_DEBUG "usbin_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
-#endif
- if (urb == u->surb[0].urb)
- mask = FLG_SYNC0RUNNING;
- else if (urb == u->surb[1].urb)
- mask = FLG_SYNC1RUNNING;
- else {
- mask = 0;
- printk(KERN_ERR "usbin_sync_completed: panic: unknown URB\n");
- }
- urb->dev = as->state->usbdev;
- spin_lock_irqsave(&as->lock, flags);
- if (!usbin_sync_retire_desc(u, urb) &&
- u->flags & FLG_RUNNING &&
- !usbin_sync_prepare_desc(u, urb) &&
- (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
- u->flags |= mask;
- } else {
- u->flags &= ~(mask | FLG_RUNNING);
- wake_up(&u->dma.wait);
- dprintk((KERN_DEBUG "usbin_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
- }
- spin_unlock_irqrestore(&as->lock, flags);
-}
-
-static int usbin_start(struct usb_audiodev *as)
-{
- struct usb_device *dev = as->state->usbdev;
- struct usbin *u = &as->usbin;
- struct urb *urb;
- unsigned long flags;
- unsigned int maxsze, bufsz;
-
-#if 0
- printk(KERN_DEBUG "usbin_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
- dev->devnum, u->format, u->dma.format, u->dma.srate);
-#endif
- /* allocate USB storage if not already done */
- spin_lock_irqsave(&as->lock, flags);
- if (!(u->flags & FLG_CONNECTED)) {
- spin_unlock_irqrestore(&as->lock, flags);
- return -EIO;
- }
- if (!(u->flags & FLG_RUNNING)) {
- spin_unlock_irqrestore(&as->lock, flags);
- u->freqn = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
- u->freqmax = u->freqn + (u->freqn >> 2);
- u->phase = 0;
- maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
- bufsz = DESCFRAMES * maxsze;
- kfree(u->durb[0].urb->transfer_buffer);
- u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
- u->durb[0].urb->transfer_buffer_length = bufsz;
- kfree(u->durb[1].urb->transfer_buffer);
- u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
- u->durb[1].urb->transfer_buffer_length = bufsz;
- if (u->syncpipe) {
- kfree(u->surb[0].urb->transfer_buffer);
- u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
- u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
- kfree(u->surb[1].urb->transfer_buffer);
- u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
- u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
- }
- if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
- (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
- printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
- return 0;
- }
- spin_lock_irqsave(&as->lock, flags);
- }
- if (u->dma.count >= u->dma.dmasize && !u->dma.mapped) {
- spin_unlock_irqrestore(&as->lock, flags);
- return 0;
- }
- u->flags |= FLG_RUNNING;
- if (!(u->flags & FLG_URB0RUNNING)) {
- urb = u->durb[0].urb;
- urb->dev = dev;
- urb->pipe = u->datapipe;
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = DESCFRAMES;
- urb->context = as;
- urb->complete = usbin_completed;
- if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
- u->flags |= FLG_URB0RUNNING;
- else
- u->flags &= ~FLG_RUNNING;
- }
- if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
- urb = u->durb[1].urb;
- urb->dev = dev;
- urb->pipe = u->datapipe;
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = DESCFRAMES;
- urb->context = as;
- urb->complete = usbin_completed;
- if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
- u->flags |= FLG_URB1RUNNING;
- else
- u->flags &= ~FLG_RUNNING;
- }
- if (u->syncpipe) {
- if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
- urb = u->surb[0].urb;
- urb->dev = dev;
- urb->pipe = u->syncpipe;
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = SYNCFRAMES;
- urb->context = as;
- urb->complete = usbin_sync_completed;
- /* stride: u->syncinterval */
- if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
- u->flags |= FLG_SYNC0RUNNING;
- else
- u->flags &= ~FLG_RUNNING;
- }
- if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
- urb = u->surb[1].urb;
- urb->dev = dev;
- urb->pipe = u->syncpipe;
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = SYNCFRAMES;
- urb->context = as;
- urb->complete = usbin_sync_completed;
- /* stride: u->syncinterval */
- if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
- u->flags |= FLG_SYNC1RUNNING;
- else
- u->flags &= ~FLG_RUNNING;
- }
- }
- spin_unlock_irqrestore(&as->lock, flags);
- return 0;
-}
-
-static void usbout_stop(struct usb_audiodev *as)
-{
- struct usbout *u = &as->usbout;
- unsigned long flags;
- unsigned int i, notkilled = 1;
-
- spin_lock_irqsave(&as->lock, flags);
- u->flags &= ~FLG_RUNNING;
- i = u->flags;
- spin_unlock_irqrestore(&as->lock, flags);
- while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
- if (notkilled)
- schedule_timeout_interruptible(1);
- else
- schedule_timeout_uninterruptible(1);
- spin_lock_irqsave(&as->lock, flags);
- i = u->flags;
- spin_unlock_irqrestore(&as->lock, flags);
- if (notkilled && signal_pending(current)) {
- if (i & FLG_URB0RUNNING)
- usb_kill_urb(u->durb[0].urb);
- if (i & FLG_URB1RUNNING)
- usb_kill_urb(u->durb[1].urb);
- if (i & FLG_SYNC0RUNNING)
- usb_kill_urb(u->surb[0].urb);
- if (i & FLG_SYNC1RUNNING)
- usb_kill_urb(u->surb[1].urb);
- notkilled = 0;
- }
- }
- set_current_state(TASK_RUNNING);
- kfree(u->durb[0].urb->transfer_buffer);
- kfree(u->durb[1].urb->transfer_buffer);
- kfree(u->surb[0].urb->transfer_buffer);
- kfree(u->surb[1].urb->transfer_buffer);
- u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer =
- u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
-}
-
-static inline void usbout_release(struct usb_audiodev *as)
-{
- usbout_stop(as);
-}
-
-static void usbout_disc(struct usb_audiodev *as)
-{
- struct usbout *u = &as->usbout;
- unsigned long flags;
-
- spin_lock_irqsave(&as->lock, flags);
- u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
- spin_unlock_irqrestore(&as->lock, flags);
- usbout_stop(as);
-}
-
-static void usbout_convert(struct usbout *u, unsigned char *buffer, unsigned int samples)
-{
- union {
- __s16 s[64];
- unsigned char b[0];
- } tmp;
- unsigned int scnt, maxs, ufmtsh, dfmtsh;
-
- ufmtsh = AFMT_BYTESSHIFT(u->format);
- dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
- maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
- while (samples > 0) {
- scnt = samples;
- if (scnt > maxs)
- scnt = maxs;
- dmabuf_copyout(&u->dma, tmp.b, scnt << dfmtsh);
- conversion(tmp.b, u->dma.format, buffer, u->format, tmp.b, scnt);
- buffer += scnt << ufmtsh;
- samples -= scnt;
- }
-}
-
-static int usbout_prepare_desc(struct usbout *u, struct urb *urb)
-{
- unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, offs;
- unsigned char *cp = urb->transfer_buffer;
-
- ufmtsh = AFMT_BYTESSHIFT(u->format);
- dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
- for (i = offs = 0; i < DESCFRAMES; i++) {
- urb->iso_frame_desc[i].offset = offs;
- u->phase = (u->phase & 0x3fff) + u->freqm;
- scnt = u->phase >> 14;
- if (!scnt) {
- urb->iso_frame_desc[i].length = 0;
- continue;
- }
- cnt = scnt << dfmtsh;
- if (!u->dma.mapped) {
- if (cnt > u->dma.count) {
- scnt = u->dma.count >> dfmtsh;
- cnt = scnt << dfmtsh;
- err++;
- }
- u->dma.count -= cnt;
- } else
- u->dma.count += cnt;
- if (u->format == u->dma.format) {
- /* we do not need format conversion */
- dmabuf_copyout(&u->dma, cp, cnt);
- } else {
- /* we need sampling format conversion */
- usbout_convert(u, cp, scnt);
- }
- cnt = scnt << ufmtsh;
- urb->iso_frame_desc[i].length = cnt;
- offs += cnt;
- cp += cnt;
- }
- urb->interval = 1;
- if (err)
- u->dma.error++;
- if (u->dma.mapped) {
- if (u->dma.count >= (signed)u->dma.fragsize)
- wake_up(&u->dma.wait);
- } else {
- if ((signed)u->dma.dmasize >= u->dma.count + (signed)u->dma.fragsize)
- wake_up(&u->dma.wait);
- }
- return err ? -1 : 0;
-}
-
-/*
- * return value: 0 if descriptor should be restarted, -1 otherwise
- */
-static int usbout_retire_desc(struct usbout *u, struct urb *urb)
-{
- unsigned int i;
-
- for (i = 0; i < DESCFRAMES; i++) {
- if (urb->iso_frame_desc[i].status) {
- dprintk((KERN_DEBUG "usbout_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
- continue;
- }
- }
- return 0;
-}
-
-static void usbout_completed(struct urb *urb, struct pt_regs *regs)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
- struct usbout *u = &as->usbout;
- unsigned long flags;
- unsigned int mask;
- int suret = 0;
-
-#if 0
- printk(KERN_DEBUG "usbout_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
-#endif
- if (urb == u->durb[0].urb)
- mask = FLG_URB0RUNNING;
- else if (urb == u->durb[1].urb)
- mask = FLG_URB1RUNNING;
- else {
- mask = 0;
- printk(KERN_ERR "usbout_completed: panic: unknown URB\n");
- }
- urb->dev = as->state->usbdev;
- spin_lock_irqsave(&as->lock, flags);
- if (!usbout_retire_desc(u, urb) &&
- u->flags & FLG_RUNNING &&
- !usbout_prepare_desc(u, urb) &&
- (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
- u->flags |= mask;
- } else {
- u->flags &= ~(mask | FLG_RUNNING);
- wake_up(&u->dma.wait);
- dprintk((KERN_DEBUG "usbout_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
- }
- spin_unlock_irqrestore(&as->lock, flags);
-}
-
-static int usbout_sync_prepare_desc(struct usbout *u, struct urb *urb)
-{
- unsigned int i, offs;
-
- for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3) {
- urb->iso_frame_desc[i].length = 3;
- urb->iso_frame_desc[i].offset = offs;
- }
- urb->interval = 1;
- return 0;
-}
-
-/*
- * return value: 0 if descriptor should be restarted, -1 otherwise
- */
-static int usbout_sync_retire_desc(struct usbout *u, struct urb *urb)
-{
- unsigned char *cp = urb->transfer_buffer;
- unsigned int f, i;
-
- for (i = 0; i < SYNCFRAMES; i++, cp += 3) {
- if (urb->iso_frame_desc[i].status) {
- dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
- continue;
- }
- if (urb->iso_frame_desc[i].actual_length < 3) {
- dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u length %d\n", i, urb->iso_frame_desc[i].actual_length));
- continue;
- }
- f = cp[0] | (cp[1] << 8) | (cp[2] << 16);
- if (abs(f - u->freqn) > (u->freqn >> 3) || f > u->freqmax) {
- printk(KERN_WARNING "usbout_sync_retire_desc: requested frequency %u (nominal %u) out of range!\n", f, u->freqn);
- continue;
- }
- u->freqm = f;
- }
- return 0;
-}
-
-static void usbout_sync_completed(struct urb *urb, struct pt_regs *regs)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
- struct usbout *u = &as->usbout;
- unsigned long flags;
- unsigned int mask;
- int suret = 0;
-
-#if 0
- printk(KERN_DEBUG "usbout_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
-#endif
- if (urb == u->surb[0].urb)
- mask = FLG_SYNC0RUNNING;
- else if (urb == u->surb[1].urb)
- mask = FLG_SYNC1RUNNING;
- else {
- mask = 0;
- printk(KERN_ERR "usbout_sync_completed: panic: unknown URB\n");
- }
- urb->dev = as->state->usbdev;
- spin_lock_irqsave(&as->lock, flags);
- if (!usbout_sync_retire_desc(u, urb) &&
- u->flags & FLG_RUNNING &&
- !usbout_sync_prepare_desc(u, urb) &&
- (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
- u->flags |= mask;
- } else {
- u->flags &= ~(mask | FLG_RUNNING);
- wake_up(&u->dma.wait);
- dprintk((KERN_DEBUG "usbout_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
- }
- spin_unlock_irqrestore(&as->lock, flags);
-}
-
-static int usbout_start(struct usb_audiodev *as)
-{
- struct usb_device *dev = as->state->usbdev;
- struct usbout *u = &as->usbout;
- struct urb *urb;
- unsigned long flags;
- unsigned int maxsze, bufsz;
-
-#if 0
- printk(KERN_DEBUG "usbout_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
- dev->devnum, u->format, u->dma.format, u->dma.srate);
-#endif
- /* allocate USB storage if not already done */
- spin_lock_irqsave(&as->lock, flags);
- if (!(u->flags & FLG_CONNECTED)) {
- spin_unlock_irqrestore(&as->lock, flags);
- return -EIO;
- }
- if (!(u->flags & FLG_RUNNING)) {
- spin_unlock_irqrestore(&as->lock, flags);
- u->freqn = u->freqm = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
- u->freqmax = u->freqn + (u->freqn >> 2);
- u->phase = 0;
- maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
- bufsz = DESCFRAMES * maxsze;
- kfree(u->durb[0].urb->transfer_buffer);
- u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
- u->durb[0].urb->transfer_buffer_length = bufsz;
- kfree(u->durb[1].urb->transfer_buffer);
- u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
- u->durb[1].urb->transfer_buffer_length = bufsz;
- if (u->syncpipe) {
- kfree(u->surb[0].urb->transfer_buffer);
- u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
- u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
- kfree(u->surb[1].urb->transfer_buffer);
- u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
- u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
- }
- if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer ||
- (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
- printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
- return 0;
- }
- spin_lock_irqsave(&as->lock, flags);
- }
- if (u->dma.count <= 0 && !u->dma.mapped) {
- spin_unlock_irqrestore(&as->lock, flags);
- return 0;
- }
- u->flags |= FLG_RUNNING;
- if (!(u->flags & FLG_URB0RUNNING)) {
- urb = u->durb[0].urb;
- urb->dev = dev;
- urb->pipe = u->datapipe;
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = DESCFRAMES;
- urb->context = as;
- urb->complete = usbout_completed;
- if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
- u->flags |= FLG_URB0RUNNING;
- else
- u->flags &= ~FLG_RUNNING;
- }
- if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
- urb = u->durb[1].urb;
- urb->dev = dev;
- urb->pipe = u->datapipe;
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = DESCFRAMES;
- urb->context = as;
- urb->complete = usbout_completed;
- if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
- u->flags |= FLG_URB1RUNNING;
- else
- u->flags &= ~FLG_RUNNING;
- }
- if (u->syncpipe) {
- if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
- urb = u->surb[0].urb;
- urb->dev = dev;
- urb->pipe = u->syncpipe;
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = SYNCFRAMES;
- urb->context = as;
- urb->complete = usbout_sync_completed;
- /* stride: u->syncinterval */
- if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
- u->flags |= FLG_SYNC0RUNNING;
- else
- u->flags &= ~FLG_RUNNING;
- }
- if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
- urb = u->surb[1].urb;
- urb->dev = dev;
- urb->pipe = u->syncpipe;
- urb->transfer_flags = URB_ISO_ASAP;
- urb->number_of_packets = SYNCFRAMES;
- urb->context = as;
- urb->complete = usbout_sync_completed;
- /* stride: u->syncinterval */
- if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
- u->flags |= FLG_SYNC1RUNNING;
- else
- u->flags &= ~FLG_RUNNING;
- }
- }
- spin_unlock_irqrestore(&as->lock, flags);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static unsigned int format_goodness(struct audioformat *afp, unsigned int fmt, unsigned int srate)
-{
- unsigned int g = 0;
-
- if (srate < afp->sratelo)
- g += afp->sratelo - srate;
- if (srate > afp->sratehi)
- g += srate - afp->sratehi;
- if (AFMT_ISSTEREO(afp->format) && !AFMT_ISSTEREO(fmt))
- g += 0x100000;
- if (!AFMT_ISSTEREO(afp->format) && AFMT_ISSTEREO(fmt))
- g += 0x400000;
- if (AFMT_IS16BIT(afp->format) && !AFMT_IS16BIT(fmt))
- g += 0x100000;
- if (!AFMT_IS16BIT(afp->format) && AFMT_IS16BIT(fmt))
- g += 0x400000;
- return g;
-}
-
-static int find_format(struct audioformat *afp, unsigned int nr, unsigned int fmt, unsigned int srate)
-{
- unsigned int i, g, gb = ~0;
- int j = -1; /* default to failure */
-
- /* find "best" format (according to format_goodness) */
- for (i = 0; i < nr; i++) {
- g = format_goodness(&afp[i], fmt, srate);
- if (g >= gb)
- continue;
- j = i;
- gb = g;
- }
- return j;
-}
-
-static int set_format_in(struct usb_audiodev *as)
-{
- struct usb_device *dev = as->state->usbdev;
- struct usb_host_interface *alts;
- struct usb_interface *iface;
- struct usbin *u = &as->usbin;
- struct dmabuf *d = &u->dma;
- struct audioformat *fmt;
- unsigned int ep;
- unsigned char data[3];
- int fmtnr, ret;
-
- iface = usb_ifnum_to_if(dev, u->interface);
- if (!iface)
- return 0;
-
- fmtnr = find_format(as->fmtin, as->numfmtin, d->format, d->srate);
- if (fmtnr < 0) {
- printk(KERN_ERR "usbaudio: set_format_in(): failed to find desired format/speed combination.\n");
- return -1;
- }
-
- fmt = as->fmtin + fmtnr;
- alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
- u->format = fmt->format;
- u->datapipe = usb_rcvisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
- u->syncpipe = u->syncinterval = 0;
- if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x08) {
- if (alts->desc.bNumEndpoints < 2 ||
- alts->endpoint[1].desc.bmAttributes != 0x01 ||
- alts->endpoint[1].desc.bSynchAddress != 0 ||
- alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress & 0x7f)) {
- printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims adaptive in "
- "but has invalid synch pipe; treating as asynchronous in\n",
- dev->devnum, u->interface, fmt->altsetting);
- } else {
- u->syncpipe = usb_sndisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
- u->syncinterval = alts->endpoint[1].desc.bRefresh;
- }
- }
- if (d->srate < fmt->sratelo)
- d->srate = fmt->sratelo;
- if (d->srate > fmt->sratehi)
- d->srate = fmt->sratehi;
- dprintk((KERN_DEBUG "usbaudio: set_format_in: usb_set_interface %u %u\n",
- u->interface, fmt->altsetting));
- if (usb_set_interface(dev, alts->desc.bInterfaceNumber, fmt->altsetting) < 0) {
- printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
- dev->devnum, u->interface, fmt->altsetting);
- return -1;
- }
- if (fmt->sratelo == fmt->sratehi)
- return 0;
- ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
- /* if endpoint has pitch control, enable it */
- if (fmt->attributes & 0x02) {
- data[0] = 1;
- if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
- PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
- printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
- ret, dev->devnum, u->interface, ep, d->srate);
- return -1;
- }
- }
- /* if endpoint has sampling rate control, set it */
- if (fmt->attributes & 0x01) {
- data[0] = d->srate;
- data[1] = d->srate >> 8;
- data[2] = d->srate >> 16;
- if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
- SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
- printk(KERN_ERR "usbaudio: failure (error %d) to set input sampling frequency device %d interface %u endpoint 0x%x to %u\n",
- ret, dev->devnum, u->interface, ep, d->srate);
- return -1;
- }
- if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
- SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
- printk(KERN_ERR "usbaudio: failure (error %d) to get input sampling frequency device %d interface %u endpoint 0x%x\n",
- ret, dev->devnum, u->interface, ep);
- return -1;
- }
- dprintk((KERN_DEBUG "usbaudio: set_format_in: device %d interface %d altsetting %d srate req: %u real %u\n",
- dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
- d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
- }
- dprintk((KERN_DEBUG "usbaudio: set_format_in: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
- return 0;
-}
-
-static int set_format_out(struct usb_audiodev *as)
-{
- struct usb_device *dev = as->state->usbdev;
- struct usb_host_interface *alts;
- struct usb_interface *iface;
- struct usbout *u = &as->usbout;
- struct dmabuf *d = &u->dma;
- struct audioformat *fmt;
- unsigned int ep;
- unsigned char data[3];
- int fmtnr, ret;
-
- iface = usb_ifnum_to_if(dev, u->interface);
- if (!iface)
- return 0;
-
- fmtnr = find_format(as->fmtout, as->numfmtout, d->format, d->srate);
- if (fmtnr < 0) {
- printk(KERN_ERR "usbaudio: set_format_out(): failed to find desired format/speed combination.\n");
- return -1;
- }
-
- fmt = as->fmtout + fmtnr;
- u->format = fmt->format;
- alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
- u->datapipe = usb_sndisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
- u->syncpipe = u->syncinterval = 0;
- if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x04) {
-#if 0
- printk(KERN_DEBUG "bNumEndpoints 0x%02x endpoint[1].bmAttributes 0x%02x\n"
- KERN_DEBUG "endpoint[1].bSynchAddress 0x%02x endpoint[1].bEndpointAddress 0x%02x\n"
- KERN_DEBUG "endpoint[0].bSynchAddress 0x%02x\n", alts->bNumEndpoints,
- alts->endpoint[1].bmAttributes, alts->endpoint[1].bSynchAddress,
- alts->endpoint[1].bEndpointAddress, alts->endpoint[0].bSynchAddress);
-#endif
- if (alts->desc.bNumEndpoints < 2 ||
- alts->endpoint[1].desc.bmAttributes != 0x01 ||
- alts->endpoint[1].desc.bSynchAddress != 0 ||
- alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress | 0x80)) {
- printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims asynch out "
- "but has invalid synch pipe; treating as adaptive out\n",
- dev->devnum, u->interface, fmt->altsetting);
- } else {
- u->syncpipe = usb_rcvisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
- u->syncinterval = alts->endpoint[1].desc.bRefresh;
- }
- }
- if (d->srate < fmt->sratelo)
- d->srate = fmt->sratelo;
- if (d->srate > fmt->sratehi)
- d->srate = fmt->sratehi;
- dprintk((KERN_DEBUG "usbaudio: set_format_out: usb_set_interface %u %u\n",
- u->interface, fmt->altsetting));
- if (usb_set_interface(dev, u->interface, fmt->altsetting) < 0) {
- printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
- dev->devnum, u->interface, fmt->altsetting);
- return -1;
- }
- if (fmt->sratelo == fmt->sratehi)
- return 0;
- ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
- /* if endpoint has pitch control, enable it */
- if (fmt->attributes & 0x02) {
- data[0] = 1;
- if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
- PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
- printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
- ret, dev->devnum, u->interface, ep, d->srate);
- return -1;
- }
- }
- /* if endpoint has sampling rate control, set it */
- if (fmt->attributes & 0x01) {
- data[0] = d->srate;
- data[1] = d->srate >> 8;
- data[2] = d->srate >> 16;
- if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
- SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
- printk(KERN_ERR "usbaudio: failure (error %d) to set output sampling frequency device %d interface %u endpoint 0x%x to %u\n",
- ret, dev->devnum, u->interface, ep, d->srate);
- return -1;
- }
- if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
- SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
- printk(KERN_ERR "usbaudio: failure (error %d) to get output sampling frequency device %d interface %u endpoint 0x%x\n",
- ret, dev->devnum, u->interface, ep);
- return -1;
- }
- dprintk((KERN_DEBUG "usbaudio: set_format_out: device %d interface %d altsetting %d srate req: %u real %u\n",
- dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
- d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
- }
- dprintk((KERN_DEBUG "usbaudio: set_format_out: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
- return 0;
-}
-
-static int set_format(struct usb_audiodev *s, unsigned int fmode, unsigned int fmt, unsigned int srate)
-{
- int ret1 = 0, ret2 = 0;
-
- if (!(fmode & (FMODE_READ|FMODE_WRITE)))
- return -EINVAL;
- if (fmode & FMODE_READ) {
- usbin_stop(s);
- s->usbin.dma.ready = 0;
- if (fmt == AFMT_QUERY)
- fmt = s->usbin.dma.format;
- else
- s->usbin.dma.format = fmt;
- if (!srate)
- srate = s->usbin.dma.srate;
- else
- s->usbin.dma.srate = srate;
- }
- if (fmode & FMODE_WRITE) {
- usbout_stop(s);
- s->usbout.dma.ready = 0;
- if (fmt == AFMT_QUERY)
- fmt = s->usbout.dma.format;
- else
- s->usbout.dma.format = fmt;
- if (!srate)
- srate = s->usbout.dma.srate;
- else
- s->usbout.dma.srate = srate;
- }
- if (fmode & FMODE_READ)
- ret1 = set_format_in(s);
- if (fmode & FMODE_WRITE)
- ret2 = set_format_out(s);
- return ret1 ? ret1 : ret2;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int wrmixer(struct usb_mixerdev *ms, unsigned mixch, unsigned value)
-{
- struct usb_device *dev = ms->state->usbdev;
- unsigned char data[2];
- struct mixerchannel *ch;
- int v1, v2, v3;
-
- if (mixch >= ms->numch)
- return -1;
- ch = &ms->ch[mixch];
- v3 = ch->maxval - ch->minval;
- v1 = value & 0xff;
- v2 = (value >> 8) & 0xff;
- if (v1 > 100)
- v1 = 100;
- if (v2 > 100)
- v2 = 100;
- if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
- v2 = v1;
- ch->value = v1 | (v2 << 8);
- v1 = (v1 * v3) / 100 + ch->minval;
- v2 = (v2 * v3) / 100 + ch->minval;
- switch (ch->selector) {
- case 0: /* mixer unit request */
- data[0] = v1;
- data[1] = v1 >> 8;
- if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- (ch->chnum << 8) | 1, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
- goto err;
- if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
- return 0;
- data[0] = v2;
- data[1] = v2 >> 8;
- if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
- ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
- goto err;
- return 0;
-
- /* various feature unit controls */
- case VOLUME_CONTROL:
- data[0] = v1;
- data[1] = v1 >> 8;
- if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
- goto err;
- if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
- return 0;
- data[0] = v2;
- data[1] = v2 >> 8;
- if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
- goto err;
- return 0;
-
- case BASS_CONTROL:
- case MID_CONTROL:
- case TREBLE_CONTROL:
- data[0] = v1 >> 8;
- if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 1, 1000) < 0)
- goto err;
- if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
- return 0;
- data[0] = v2 >> 8;
- if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 1, 1000) < 0)
- goto err;
- return 0;
-
- default:
- return -1;
- }
- return 0;
-
- err:
- printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
- dev->devnum, ms->iface, ch->unitid, ch->chnum, ch->selector);
- return -1;
-}
-
-static int get_rec_src(struct usb_mixerdev *ms)
-{
- struct usb_device *dev = ms->state->usbdev;
- unsigned int mask = 0, retmask = 0;
- unsigned int i, j;
- unsigned char buf;
- int err = 0;
-
- for (i = 0; i < ms->numch; i++) {
- if (!ms->ch[i].slctunitid || (mask & (1 << i)))
- continue;
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- 0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) {
- err = -EIO;
- printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
- dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
- continue;
- }
- for (j = i; j < ms->numch; j++) {
- if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
- continue;
- mask |= 1 << j;
- if (buf == (ms->ch[j].slctunitid >> 8))
- retmask |= 1 << ms->ch[j].osschannel;
- }
- }
- if (err)
- return -EIO;
- return retmask;
-}
-
-static int set_rec_src(struct usb_mixerdev *ms, int srcmask)
-{
- struct usb_device *dev = ms->state->usbdev;
- unsigned int mask = 0, smask, bmask;
- unsigned int i, j;
- unsigned char buf;
- int err = 0;
-
- for (i = 0; i < ms->numch; i++) {
- if (!ms->ch[i].slctunitid || (mask & (1 << i)))
- continue;
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- 0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) {
- err = -EIO;
- printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n",
- dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
- continue;
- }
- /* first generate smask */
- smask = bmask = 0;
- for (j = i; j < ms->numch; j++) {
- if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
- continue;
- smask |= 1 << ms->ch[j].osschannel;
- if (buf == (ms->ch[j].slctunitid >> 8))
- bmask |= 1 << ms->ch[j].osschannel;
- mask |= 1 << j;
- }
- /* check for multiple set sources */
- j = hweight32(srcmask & smask);
- if (j == 0)
- continue;
- if (j > 1)
- srcmask &= ~bmask;
- for (j = i; j < ms->numch; j++) {
- if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
- continue;
- if (!(srcmask & (1 << ms->ch[j].osschannel)))
- continue;
- buf = ms->ch[j].slctunitid >> 8;
- if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- 0, ms->iface | (ms->ch[j].slctunitid << 8), &buf, 1, 1000) < 0) {
- err = -EIO;
- printk(KERN_ERR "usbaudio: selector write request device %u if %u unit %u failed\n",
- dev->devnum, ms->iface, ms->ch[j].slctunitid & 0xff);
- continue;
- }
- }
- }
- return err ? -EIO : 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * should be called with open_sem hold, so that no new processes
- * look at the audio device to be destroyed
- */
-
-static void release(struct usb_audio_state *s)
-{
- struct usb_audiodev *as;
- struct usb_mixerdev *ms;
-
- s->count--;
- if (s->count) {
- up(&open_sem);
- return;
- }
- up(&open_sem);
- wake_up(&open_wait);
- while (!list_empty(&s->audiolist)) {
- as = list_entry(s->audiolist.next, struct usb_audiodev, list);
- list_del(&as->list);
- usbin_release(as);
- usbout_release(as);
- dmabuf_release(&as->usbin.dma);
- dmabuf_release(&as->usbout.dma);
- usb_free_urb(as->usbin.durb[0].urb);
- usb_free_urb(as->usbin.durb[1].urb);
- usb_free_urb(as->usbin.surb[0].urb);
- usb_free_urb(as->usbin.surb[1].urb);
- usb_free_urb(as->usbout.durb[0].urb);
- usb_free_urb(as->usbout.durb[1].urb);
- usb_free_urb(as->usbout.surb[0].urb);
- usb_free_urb(as->usbout.surb[1].urb);
- kfree(as);
- }
- while (!list_empty(&s->mixerlist)) {
- ms = list_entry(s->mixerlist.next, struct usb_mixerdev, list);
- list_del(&ms->list);
- kfree(ms);
- }
- kfree(s);
-}
-
-static inline int prog_dmabuf_in(struct usb_audiodev *as)
-{
- usbin_stop(as);
- return dmabuf_init(&as->usbin.dma);
-}
-
-static inline int prog_dmabuf_out(struct usb_audiodev *as)
-{
- usbout_stop(as);
- return dmabuf_init(&as->usbout.dma);
-}
-
-/* --------------------------------------------------------------------- */
-
-static int usb_audio_open_mixdev(struct inode *inode, struct file *file)
-{
- unsigned int minor = iminor(inode);
- struct usb_mixerdev *ms;
- struct usb_audio_state *s;
-
- down(&open_sem);
- list_for_each_entry(s, &audiodevs, audiodev) {
- list_for_each_entry(ms, &s->mixerlist, list) {
- if (ms->dev_mixer == minor)
- goto mixer_found;
- }
- }
- up(&open_sem);
- return -ENODEV;
-
- mixer_found:
- if (!s->usbdev) {
- up(&open_sem);
- return -EIO;
- }
- file->private_data = ms;
- s->count++;
-
- up(&open_sem);
- return nonseekable_open(inode, file);
-}
-
-static int usb_audio_release_mixdev(struct inode *inode, struct file *file)
-{
- struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
- struct usb_audio_state *s;
-
- lock_kernel();
- s = ms->state;
- down(&open_sem);
- release(s);
- unlock_kernel();
- return 0;
-}
-
-static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
- struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
- int i, j, val;
- int __user *user_arg = (int __user *)arg;
-
- if (!ms->state->usbdev)
- return -ENODEV;
-
- if (cmd == SOUND_MIXER_INFO) {
- mixer_info info;
-
- memset(&info, 0, sizeof(info));
- strncpy(info.id, "USB_AUDIO", sizeof(info.id));
- strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
- info.modify_counter = ms->modcnt;
- if (copy_to_user((void __user *)arg, &info, sizeof(info)))
- return -EFAULT;
- return 0;
- }
- if (cmd == SOUND_OLD_MIXER_INFO) {
- _old_mixer_info info;
-
- memset(&info, 0, sizeof(info));
- strncpy(info.id, "USB_AUDIO", sizeof(info.id));
- strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
- if (copy_to_user((void __user *)arg, &info, sizeof(info)))
- return -EFAULT;
- return 0;
- }
- if (cmd == OSS_GETVERSION)
- return put_user(SOUND_VERSION, user_arg);
- if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
- return -EINVAL;
- if (_IOC_DIR(cmd) == _IOC_READ) {
- switch (_IOC_NR(cmd)) {
- case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
- val = get_rec_src(ms);
- if (val < 0)
- return val;
- return put_user(val, user_arg);
-
- case SOUND_MIXER_DEVMASK: /* Arg contains a bit for each supported device */
- for (val = i = 0; i < ms->numch; i++)
- val |= 1 << ms->ch[i].osschannel;
- return put_user(val, user_arg);
-
- case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
- for (val = i = 0; i < ms->numch; i++)
- if (ms->ch[i].slctunitid)
- val |= 1 << ms->ch[i].osschannel;
- return put_user(val, user_arg);
-
- case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
- for (val = i = 0; i < ms->numch; i++)
- if (ms->ch[i].flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))
- val |= 1 << ms->ch[i].osschannel;
- return put_user(val, user_arg);
-
- case SOUND_MIXER_CAPS:
- return put_user(SOUND_CAP_EXCL_INPUT, user_arg);
-
- default:
- i = _IOC_NR(cmd);
- if (i >= SOUND_MIXER_NRDEVICES)
- return -EINVAL;
- for (j = 0; j < ms->numch; j++) {
- if (ms->ch[j].osschannel == i) {
- return put_user(ms->ch[j].value, user_arg);
- }
- }
- return -EINVAL;
- }
- }
- if (_IOC_DIR(cmd) != (_IOC_READ|_IOC_WRITE))
- return -EINVAL;
- ms->modcnt++;
- switch (_IOC_NR(cmd)) {
- case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
- if (get_user(val, user_arg))
- return -EFAULT;
- return set_rec_src(ms, val);
-
- default:
- i = _IOC_NR(cmd);
- if (i >= SOUND_MIXER_NRDEVICES)
- return -EINVAL;
- for (j = 0; j < ms->numch && ms->ch[j].osschannel != i; j++);
- if (j >= ms->numch)
- return -EINVAL;
- if (get_user(val, user_arg))
- return -EFAULT;
- if (wrmixer(ms, j, val))
- return -EIO;
- return put_user(ms->ch[j].value, user_arg);
- }
-}
-
-static /*const*/ struct file_operations usb_mixer_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .ioctl = usb_audio_ioctl_mixdev,
- .open = usb_audio_open_mixdev,
- .release = usb_audio_release_mixdev,
-};
-
-/* --------------------------------------------------------------------- */
-
-static int drain_out(struct usb_audiodev *as, int nonblock)
-{
- DECLARE_WAITQUEUE(wait, current);
- unsigned long flags;
- int count, tmo;
-
- if (as->usbout.dma.mapped || !as->usbout.dma.ready)
- return 0;
- usbout_start(as);
- add_wait_queue(&as->usbout.dma.wait, &wait);
- for (;;) {
- __set_current_state(TASK_INTERRUPTIBLE);
- spin_lock_irqsave(&as->lock, flags);
- count = as->usbout.dma.count;
- spin_unlock_irqrestore(&as->lock, flags);
- if (count <= 0)
- break;
- if (signal_pending(current))
- break;
- if (nonblock) {
- remove_wait_queue(&as->usbout.dma.wait, &wait);
- set_current_state(TASK_RUNNING);
- return -EBUSY;
- }
- tmo = 3 * HZ * count / as->usbout.dma.srate;
- tmo >>= AFMT_BYTESSHIFT(as->usbout.dma.format);
- if (!schedule_timeout(tmo + 1)) {
- printk(KERN_DEBUG "usbaudio: dma timed out??\n");
- break;
- }
- }
- remove_wait_queue(&as->usbout.dma.wait, &wait);
- set_current_state(TASK_RUNNING);
- if (signal_pending(current))
- return -ERESTARTSYS;
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static ssize_t usb_audio_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
- DECLARE_WAITQUEUE(wait, current);
- ssize_t ret = 0;
- unsigned long flags;
- unsigned int ptr;
- int cnt, err;
-
- if (as->usbin.dma.mapped)
- return -ENXIO;
- if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
- return ret;
- if (!access_ok(VERIFY_WRITE, buffer, count))
- return -EFAULT;
- add_wait_queue(&as->usbin.dma.wait, &wait);
- while (count > 0) {
- spin_lock_irqsave(&as->lock, flags);
- ptr = as->usbin.dma.rdptr;
- cnt = as->usbin.dma.count;
- /* set task state early to avoid wakeup races */
- if (cnt <= 0)
- __set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&as->lock, flags);
- if (cnt > count)
- cnt = count;
- if (cnt <= 0) {
- if (usbin_start(as)) {
- if (!ret)
- ret = -ENODEV;
- break;
- }
- if (file->f_flags & O_NONBLOCK) {
- if (!ret)
- ret = -EAGAIN;
- break;
- }
- schedule();
- if (signal_pending(current)) {
- if (!ret)
- ret = -ERESTARTSYS;
- break;
- }
- continue;
- }
- if ((err = dmabuf_copyout_user(&as->usbin.dma, ptr, buffer, cnt))) {
- if (!ret)
- ret = err;
- break;
- }
- ptr += cnt;
- if (ptr >= as->usbin.dma.dmasize)
- ptr -= as->usbin.dma.dmasize;
- spin_lock_irqsave(&as->lock, flags);
- as->usbin.dma.rdptr = ptr;
- as->usbin.dma.count -= cnt;
- spin_unlock_irqrestore(&as->lock, flags);
- count -= cnt;
- buffer += cnt;
- ret += cnt;
- }
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&as->usbin.dma.wait, &wait);
- return ret;
-}
-
-static ssize_t usb_audio_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
- DECLARE_WAITQUEUE(wait, current);
- ssize_t ret = 0;
- unsigned long flags;
- unsigned int ptr;
- unsigned int start_thr;
- int cnt, err;
-
- if (as->usbout.dma.mapped)
- return -ENXIO;
- if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
- return ret;
- if (!access_ok(VERIFY_READ, buffer, count))
- return -EFAULT;
- start_thr = (as->usbout.dma.srate << AFMT_BYTESSHIFT(as->usbout.dma.format)) / (1000 / (3 * DESCFRAMES));
- add_wait_queue(&as->usbout.dma.wait, &wait);
- while (count > 0) {
-#if 0
- printk(KERN_DEBUG "usb_audio_write: count %u dma: count %u rdptr %u wrptr %u dmasize %u fragsize %u flags 0x%02x taskst 0x%lx\n",
- count, as->usbout.dma.count, as->usbout.dma.rdptr, as->usbout.dma.wrptr, as->usbout.dma.dmasize, as->usbout.dma.fragsize,
- as->usbout.flags, current->state);
-#endif
- spin_lock_irqsave(&as->lock, flags);
- if (as->usbout.dma.count < 0) {
- as->usbout.dma.count = 0;
- as->usbout.dma.rdptr = as->usbout.dma.wrptr;
- }
- ptr = as->usbout.dma.wrptr;
- cnt = as->usbout.dma.dmasize - as->usbout.dma.count;
- /* set task state early to avoid wakeup races */
- if (cnt <= 0)
- __set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&as->lock, flags);
- if (cnt > count)
- cnt = count;
- if (cnt <= 0) {
- if (usbout_start(as)) {
- if (!ret)
- ret = -ENODEV;
- break;
- }
- if (file->f_flags & O_NONBLOCK) {
- if (!ret)
- ret = -EAGAIN;
- break;
- }
- schedule();
- if (signal_pending(current)) {
- if (!ret)
- ret = -ERESTARTSYS;
- break;
- }
- continue;
- }
- if ((err = dmabuf_copyin_user(&as->usbout.dma, ptr, buffer, cnt))) {
- if (!ret)
- ret = err;
- break;
- }
- ptr += cnt;
- if (ptr >= as->usbout.dma.dmasize)
- ptr -= as->usbout.dma.dmasize;
- spin_lock_irqsave(&as->lock, flags);
- as->usbout.dma.wrptr = ptr;
- as->usbout.dma.count += cnt;
- spin_unlock_irqrestore(&as->lock, flags);
- count -= cnt;
- buffer += cnt;
- ret += cnt;
- if (as->usbout.dma.count >= start_thr && usbout_start(as)) {
- if (!ret)
- ret = -ENODEV;
- break;
- }
- }
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&as->usbout.dma.wait, &wait);
- return ret;
-}
-
-/* Called without the kernel lock - fine */
-static unsigned int usb_audio_poll(struct file *file, struct poll_table_struct *wait)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
- unsigned long flags;
- unsigned int mask = 0;
-
- if (file->f_mode & FMODE_WRITE) {
- if (!as->usbout.dma.ready)
- prog_dmabuf_out(as);
- poll_wait(file, &as->usbout.dma.wait, wait);
- }
- if (file->f_mode & FMODE_READ) {
- if (!as->usbin.dma.ready)
- prog_dmabuf_in(as);
- poll_wait(file, &as->usbin.dma.wait, wait);
- }
- spin_lock_irqsave(&as->lock, flags);
- if (file->f_mode & FMODE_READ) {
- if (as->usbin.dma.count >= (signed)as->usbin.dma.fragsize)
- mask |= POLLIN | POLLRDNORM;
- }
- if (file->f_mode & FMODE_WRITE) {
- if (as->usbout.dma.mapped) {
- if (as->usbout.dma.count >= (signed)as->usbout.dma.fragsize)
- mask |= POLLOUT | POLLWRNORM;
- } else {
- if ((signed)as->usbout.dma.dmasize >= as->usbout.dma.count + (signed)as->usbout.dma.fragsize)
- mask |= POLLOUT | POLLWRNORM;
- }
- }
- spin_unlock_irqrestore(&as->lock, flags);
- return mask;
-}
-
-static int usb_audio_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
- struct dmabuf *db;
- int ret = -EINVAL;
-
- lock_kernel();
- if (vma->vm_flags & VM_WRITE) {
- if ((ret = prog_dmabuf_out(as)) != 0)
- goto out;
- db = &as->usbout.dma;
- } else if (vma->vm_flags & VM_READ) {
- if ((ret = prog_dmabuf_in(as)) != 0)
- goto out;
- db = &as->usbin.dma;
- } else
- goto out;
-
- ret = -EINVAL;
- if (vma->vm_pgoff != 0)
- goto out;
-
- ret = dmabuf_mmap(vma, db, vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_page_prot);
-out:
- unlock_kernel();
- return ret;
-}
-
-static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
- struct usb_audio_state *s = as->state;
- int __user *user_arg = (int __user *)arg;
- unsigned long flags;
- audio_buf_info abinfo;
- count_info cinfo;
- int val = 0;
- int val2, mapped, ret;
-
- if (!s->usbdev)
- return -EIO;
- mapped = ((file->f_mode & FMODE_WRITE) && as->usbout.dma.mapped) ||
- ((file->f_mode & FMODE_READ) && as->usbin.dma.mapped);
-#if 0
- if (arg)
- get_user(val, (int *)arg);
- printk(KERN_DEBUG "usbaudio: usb_audio_ioctl cmd=%x arg=%lx *arg=%d\n", cmd, arg, val)
-#endif
- switch (cmd) {
- case OSS_GETVERSION:
- return put_user(SOUND_VERSION, user_arg);
-
- case SNDCTL_DSP_SYNC:
- if (file->f_mode & FMODE_WRITE)
- return drain_out(as, 0/*file->f_flags & O_NONBLOCK*/);
- return 0;
-
- case SNDCTL_DSP_SETDUPLEX:
- return 0;
-
- case SNDCTL_DSP_GETCAPS:
- return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER |
- DSP_CAP_MMAP | DSP_CAP_BATCH, user_arg);
-
- case SNDCTL_DSP_RESET:
- if (file->f_mode & FMODE_WRITE) {
- usbout_stop(as);
- as->usbout.dma.rdptr = as->usbout.dma.wrptr = as->usbout.dma.count = as->usbout.dma.total_bytes = 0;
- }
- if (file->f_mode & FMODE_READ) {
- usbin_stop(as);
- as->usbin.dma.rdptr = as->usbin.dma.wrptr = as->usbin.dma.count = as->usbin.dma.total_bytes = 0;
- }
- return 0;
-
- case SNDCTL_DSP_SPEED:
- if (get_user(val, user_arg))
- return -EFAULT;
- if (val >= 0) {
- if (val < 4000)
- val = 4000;
- if (val > 100000)
- val = 100000;
- if (set_format(as, file->f_mode, AFMT_QUERY, val))
- return -EIO;
- }
- return put_user((file->f_mode & FMODE_READ) ?
- as->usbin.dma.srate : as->usbout.dma.srate,
- user_arg);
-
- case SNDCTL_DSP_STEREO:
- if (get_user(val, user_arg))
- return -EFAULT;
- val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
- if (val)
- val2 |= AFMT_STEREO;
- else
- val2 &= ~AFMT_STEREO;
- if (set_format(as, file->f_mode, val2, 0))
- return -EIO;
- return 0;
-
- case SNDCTL_DSP_CHANNELS:
- if (get_user(val, user_arg))
- return -EFAULT;
- if (val != 0) {
- val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
- if (val == 1)
- val2 &= ~AFMT_STEREO;
- else
- val2 |= AFMT_STEREO;
- if (set_format(as, file->f_mode, val2, 0))
- return -EIO;
- }
- val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
- return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);
-
- case SNDCTL_DSP_GETFMTS: /* Returns a mask */
- return put_user(AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
- AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE, user_arg);
-
- case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
- if (get_user(val, user_arg))
- return -EFAULT;
- if (val != AFMT_QUERY) {
- if (hweight32(val) != 1)
- return -EINVAL;
- if (!(val & (AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
- AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE)))
- return -EINVAL;
- val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
- val |= val2 & AFMT_STEREO;
- if (set_format(as, file->f_mode, val, 0))
- return -EIO;
- }
- val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
- return put_user(val2 & ~AFMT_STEREO, user_arg);
-
- case SNDCTL_DSP_POST:
- return 0;
-
- case SNDCTL_DSP_GETTRIGGER:
- val = 0;
- if (file->f_mode & FMODE_READ && as->usbin.flags & FLG_RUNNING)
- val |= PCM_ENABLE_INPUT;
- if (file->f_mode & FMODE_WRITE && as->usbout.flags & FLG_RUNNING)
- val |= PCM_ENABLE_OUTPUT;
- return put_user(val, user_arg);
-
- case SNDCTL_DSP_SETTRIGGER:
- if (get_user(val, user_arg))
- return -EFAULT;
- if (file->f_mode & FMODE_READ) {
- if (val & PCM_ENABLE_INPUT) {
- if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
- return ret;
- if (usbin_start(as))
- return -ENODEV;
- } else
- usbin_stop(as);
- }
- if (file->f_mode & FMODE_WRITE) {
- if (val & PCM_ENABLE_OUTPUT) {
- if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
- return ret;
- if (usbout_start(as))
- return -ENODEV;
- } else
- usbout_stop(as);
- }
- return 0;
-
- case SNDCTL_DSP_GETOSPACE:
- if (!(file->f_mode & FMODE_WRITE))
- return -EINVAL;
- if (!(as->usbout.flags & FLG_RUNNING) && (val = prog_dmabuf_out(as)) != 0)
- return val;
- spin_lock_irqsave(&as->lock, flags);
- abinfo.fragsize = as->usbout.dma.fragsize;
- abinfo.bytes = as->usbout.dma.dmasize - as->usbout.dma.count;
- abinfo.fragstotal = as->usbout.dma.numfrag;
- abinfo.fragments = abinfo.bytes >> as->usbout.dma.fragshift;
- spin_unlock_irqrestore(&as->lock, flags);
- return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
-
- case SNDCTL_DSP_GETISPACE:
- if (!(file->f_mode & FMODE_READ))
- return -EINVAL;
- if (!(as->usbin.flags & FLG_RUNNING) && (val = prog_dmabuf_in(as)) != 0)
- return val;
- spin_lock_irqsave(&as->lock, flags);
- abinfo.fragsize = as->usbin.dma.fragsize;
- abinfo.bytes = as->usbin.dma.count;
- abinfo.fragstotal = as->usbin.dma.numfrag;
- abinfo.fragments = abinfo.bytes >> as->usbin.dma.fragshift;
- spin_unlock_irqrestore(&as->lock, flags);
- return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
-
- case SNDCTL_DSP_NONBLOCK:
- file->f_flags |= O_NONBLOCK;
- return 0;
-
- case SNDCTL_DSP_GETODELAY:
- if (!(file->f_mode & FMODE_WRITE))
- return -EINVAL;
- spin_lock_irqsave(&as->lock, flags);
- val = as->usbout.dma.count;
- spin_unlock_irqrestore(&as->lock, flags);
- return put_user(val, user_arg);
-
- case SNDCTL_DSP_GETIPTR:
- if (!(file->f_mode & FMODE_READ))
- return -EINVAL;
- spin_lock_irqsave(&as->lock, flags);
- cinfo.bytes = as->usbin.dma.total_bytes;
- cinfo.blocks = as->usbin.dma.count >> as->usbin.dma.fragshift;
- cinfo.ptr = as->usbin.dma.wrptr;
- if (as->usbin.dma.mapped)
- as->usbin.dma.count &= as->usbin.dma.fragsize-1;
- spin_unlock_irqrestore(&as->lock, flags);
- if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
- return -EFAULT;
- return 0;
-
- case SNDCTL_DSP_GETOPTR:
- if (!(file->f_mode & FMODE_WRITE))
- return -EINVAL;
- spin_lock_irqsave(&as->lock, flags);
- cinfo.bytes = as->usbout.dma.total_bytes;
- cinfo.blocks = as->usbout.dma.count >> as->usbout.dma.fragshift;
- cinfo.ptr = as->usbout.dma.rdptr;
- if (as->usbout.dma.mapped)
- as->usbout.dma.count &= as->usbout.dma.fragsize-1;
- spin_unlock_irqrestore(&as->lock, flags);
- if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
- return -EFAULT;
- return 0;
-
- case SNDCTL_DSP_GETBLKSIZE:
- if (file->f_mode & FMODE_WRITE) {
- if ((val = prog_dmabuf_out(as)))
- return val;
- return put_user(as->usbout.dma.fragsize, user_arg);
- }
- if ((val = prog_dmabuf_in(as)))
- return val;
- return put_user(as->usbin.dma.fragsize, user_arg);
-
- case SNDCTL_DSP_SETFRAGMENT:
- if (get_user(val, user_arg))
- return -EFAULT;
- if (file->f_mode & FMODE_READ) {
- as->usbin.dma.ossfragshift = val & 0xffff;
- as->usbin.dma.ossmaxfrags = (val >> 16) & 0xffff;
- if (as->usbin.dma.ossfragshift < 4)
- as->usbin.dma.ossfragshift = 4;
- if (as->usbin.dma.ossfragshift > 15)
- as->usbin.dma.ossfragshift = 15;
- if (as->usbin.dma.ossmaxfrags < 4)
- as->usbin.dma.ossmaxfrags = 4;
- }
- if (file->f_mode & FMODE_WRITE) {
- as->usbout.dma.ossfragshift = val & 0xffff;
- as->usbout.dma.ossmaxfrags = (val >> 16) & 0xffff;
- if (as->usbout.dma.ossfragshift < 4)
- as->usbout.dma.ossfragshift = 4;
- if (as->usbout.dma.ossfragshift > 15)
- as->usbout.dma.ossfragshift = 15;
- if (as->usbout.dma.ossmaxfrags < 4)
- as->usbout.dma.ossmaxfrags = 4;
- }
- return 0;
-
- case SNDCTL_DSP_SUBDIVIDE:
- if ((file->f_mode & FMODE_READ && as->usbin.dma.subdivision) ||
- (file->f_mode & FMODE_WRITE && as->usbout.dma.subdivision))
- return -EINVAL;
- if (get_user(val, user_arg))
- return -EFAULT;
- if (val != 1 && val != 2 && val != 4)
- return -EINVAL;
- if (file->f_mode & FMODE_READ)
- as->usbin.dma.subdivision = val;
- if (file->f_mode & FMODE_WRITE)
- as->usbout.dma.subdivision = val;
- return 0;
-
- case SOUND_PCM_READ_RATE:
- return put_user((file->f_mode & FMODE_READ) ?
- as->usbin.dma.srate : as->usbout.dma.srate,
- user_arg);
-
- case SOUND_PCM_READ_CHANNELS:
- val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
- return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);
-
- case SOUND_PCM_READ_BITS:
- val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
- return put_user(AFMT_IS16BIT(val2) ? 16 : 8, user_arg);
-
- case SOUND_PCM_WRITE_FILTER:
- case SNDCTL_DSP_SETSYNCRO:
- case SOUND_PCM_READ_FILTER:
- return -EINVAL;
- }
- dprintk((KERN_DEBUG "usbaudio: usb_audio_ioctl - no command found\n"));
- return -ENOIOCTLCMD;
-}
-
-static int usb_audio_open(struct inode *inode, struct file *file)
-{
- unsigned int minor = iminor(inode);
- DECLARE_WAITQUEUE(wait, current);
- struct usb_audiodev *as;
- struct usb_audio_state *s;
-
- for (;;) {
- down(&open_sem);
- list_for_each_entry(s, &audiodevs, audiodev) {
- list_for_each_entry(as, &s->audiolist, list) {
- if (!((as->dev_audio ^ minor) & ~0xf))
- goto device_found;
- }
- }
- up(&open_sem);
- return -ENODEV;
-
- device_found:
- if (!s->usbdev) {
- up(&open_sem);
- return -EIO;
- }
- /* wait for device to become free */
- if (!(as->open_mode & file->f_mode))
- break;
- if (file->f_flags & O_NONBLOCK) {
- up(&open_sem);
- return -EBUSY;
- }
- __set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&open_wait, &wait);
- up(&open_sem);
- schedule();
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&open_wait, &wait);
- if (signal_pending(current))
- return -ERESTARTSYS;
- }
- if (file->f_mode & FMODE_READ)
- as->usbin.dma.ossfragshift = as->usbin.dma.ossmaxfrags = as->usbin.dma.subdivision = 0;
- if (file->f_mode & FMODE_WRITE)
- as->usbout.dma.ossfragshift = as->usbout.dma.ossmaxfrags = as->usbout.dma.subdivision = 0;
- if (set_format(as, file->f_mode, ((minor & 0xf) == SND_DEV_DSP16) ? AFMT_S16_LE : AFMT_U8 /* AFMT_ULAW */, 8000)) {
- up(&open_sem);
- return -EIO;
- }
- file->private_data = as;
- as->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
- s->count++;
- up(&open_sem);
- return nonseekable_open(inode, file);
-}
-
-static int usb_audio_release(struct inode *inode, struct file *file)
-{
- struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
- struct usb_audio_state *s;
- struct usb_device *dev;
-
- lock_kernel();
- s = as->state;
- dev = s->usbdev;
- if (file->f_mode & FMODE_WRITE)
- drain_out(as, file->f_flags & O_NONBLOCK);
- down(&open_sem);
- if (file->f_mode & FMODE_WRITE) {
- usbout_stop(as);
- if (dev && as->usbout.interface >= 0)
- usb_set_interface(dev, as->usbout.interface, 0);
- dmabuf_release(&as->usbout.dma);
- usbout_release(as);
- }
- if (file->f_mode & FMODE_READ) {
- usbin_stop(as);
- if (dev && as->usbin.interface >= 0)
- usb_set_interface(dev, as->usbin.interface, 0);
- dmabuf_release(&as->usbin.dma);
- usbin_release(as);
- }
- as->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
- release(s);
- wake_up(&open_wait);
- unlock_kernel();
- return 0;
-}
-
-static /*const*/ struct file_operations usb_audio_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .read = usb_audio_read,
- .write = usb_audio_write,
- .poll = usb_audio_poll,
- .ioctl = usb_audio_ioctl,
- .mmap = usb_audio_mmap,
- .open = usb_audio_open,
- .release = usb_audio_release,
-};
-
-/* --------------------------------------------------------------------- */
-
-static int usb_audio_probe(struct usb_interface *iface,
- const struct usb_device_id *id);
-static void usb_audio_disconnect(struct usb_interface *iface);
-
-static struct usb_device_id usb_audio_ids [] = {
- { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
- .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = 1},
- { } /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE (usb, usb_audio_ids);
-
-static struct usb_driver usb_audio_driver = {
- .name = "audio",
- .probe = usb_audio_probe,
- .disconnect = usb_audio_disconnect,
- .id_table = usb_audio_ids,
-};
-
-static void *find_descriptor(void *descstart, unsigned int desclen, void *after,
- u8 dtype, int iface, int altsetting)
-{
- u8 *p, *end, *next;
- int ifc = -1, as = -1;
-
- p = descstart;
- end = p + desclen;
- for (; p < end;) {
- if (p[0] < 2)
- return NULL;
- next = p + p[0];
- if (next > end)
- return NULL;
- if (p[1] == USB_DT_INTERFACE) {
- /* minimum length of interface descriptor */
- if (p[0] < 9)
- return NULL;
- ifc = p[2];
- as = p[3];
- }
- if (p[1] == dtype && (!after || (void *)p > after) &&
- (iface == -1 || iface == ifc) && (altsetting == -1 || altsetting == as)) {
- return p;
- }
- p = next;
- }
- return NULL;
-}
-
-static void *find_csinterface_descriptor(void *descstart, unsigned int desclen, void *after, u8 dsubtype, int iface, int altsetting)
-{
- unsigned char *p;
-
- p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, altsetting);
- while (p) {
- if (p[0] >= 3 && p[2] == dsubtype)
- return p;
- p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, altsetting);
- }
- return NULL;
-}
-
-static void *find_audiocontrol_unit(void *descstart, unsigned int desclen, void *after, u8 unit, int iface)
-{
- unsigned char *p;
-
- p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, -1);
- while (p) {
- if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
- return p;
- p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, -1);
- }
- return NULL;
-}
-
-static void usb_audio_parsestreaming(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, int asifin, int asifout)
-{
- struct usb_device *dev = s->usbdev;
- struct usb_audiodev *as;
- struct usb_host_interface *alts;
- struct usb_interface *iface;
- struct audioformat *fp;
- unsigned char *fmt, *csep;
- unsigned int i, j, k, format, idx;
-
- if (!(as = kmalloc(sizeof(struct usb_audiodev), GFP_KERNEL)))
- return;
- memset(as, 0, sizeof(struct usb_audiodev));
- init_waitqueue_head(&as->usbin.dma.wait);
- init_waitqueue_head(&as->usbout.dma.wait);
- spin_lock_init(&as->lock);
- as->usbin.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
- as->usbin.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
- as->usbin.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
- as->usbin.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
- as->usbout.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
- as->usbout.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
- as->usbout.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
- as->usbout.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
- if ((!as->usbin.durb[0].urb) ||
- (!as->usbin.durb[1].urb) ||
- (!as->usbin.surb[0].urb) ||
- (!as->usbin.surb[1].urb) ||
- (!as->usbout.durb[0].urb) ||
- (!as->usbout.durb[1].urb) ||
- (!as->usbout.surb[0].urb) ||
- (!as->usbout.surb[1].urb)) {
- usb_free_urb(as->usbin.durb[0].urb);
- usb_free_urb(as->usbin.durb[1].urb);
- usb_free_urb(as->usbin.surb[0].urb);
- usb_free_urb(as->usbin.surb[1].urb);
- usb_free_urb(as->usbout.durb[0].urb);
- usb_free_urb(as->usbout.durb[1].urb);
- usb_free_urb(as->usbout.surb[0].urb);
- usb_free_urb(as->usbout.surb[1].urb);
- kfree(as);
- return;
- }
- as->state = s;
- as->usbin.interface = asifin;
- as->usbout.interface = asifout;
- /* search for input formats */
- if (asifin >= 0) {
- as->usbin.flags = FLG_CONNECTED;
- iface = usb_ifnum_to_if(dev, asifin);
- for (idx = 0; idx < iface->num_altsetting; idx++) {
- alts = &iface->altsetting[idx];
- i = alts->desc.bAlternateSetting;
- if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
- continue;
- if (alts->desc.bNumEndpoints < 1) {
- if (i != 0) { /* altsetting 0 has no endpoints (Section B.3.4.1) */
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
- dev->devnum, asifin, i);
- }
- continue;
- }
- if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
- !(alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous in\n",
- dev->devnum, asifin, i);
- continue;
- }
- fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifin, i);
- if (!fmt) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
- dev->devnum, asifin, i);
- continue;
- }
- if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
- dev->devnum, asifin, i);
- continue;
- }
- format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
- fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifin, i);
- if (!fmt) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
- dev->devnum, asifin, i);
- continue;
- }
- if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
- dev->devnum, asifin, i);
- continue;
- }
- if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
- dev->devnum, asifin, i, fmt[4], fmt[5]);
- continue;
- }
- csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifin, i);
- if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
- dev->devnum, asifin, i);
- continue;
- }
- if (as->numfmtin >= MAXFORMATS)
- continue;
- fp = &as->fmtin[as->numfmtin++];
- if (fmt[5] == 2)
- format &= (AFMT_U16_LE | AFMT_S16_LE);
- else
- format &= (AFMT_U8 | AFMT_S8);
- if (fmt[4] == 2)
- format |= AFMT_STEREO;
- fp->format = format;
- fp->altsetting = i;
- fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
- printk(KERN_INFO "usbaudio: valid input sample rate %u\n", fp->sratelo);
- for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
- k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
- printk(KERN_INFO "usbaudio: valid input sample rate %u\n", k);
- if (k > fp->sratehi)
- fp->sratehi = k;
- if (k < fp->sratelo)
- fp->sratelo = k;
- }
- fp->attributes = csep[3];
- printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
- dev->devnum, asifin, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
- }
- }
- /* search for output formats */
- if (asifout >= 0) {
- as->usbout.flags = FLG_CONNECTED;
- iface = usb_ifnum_to_if(dev, asifout);
- for (idx = 0; idx < iface->num_altsetting; idx++) {
- alts = &iface->altsetting[idx];
- i = alts->desc.bAlternateSetting;
- if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
- continue;
- if (alts->desc.bNumEndpoints < 1) {
- /* altsetting 0 should never have iso EPs */
- if (i != 0)
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n",
- dev->devnum, asifout, i);
- continue;
- }
- if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
- (alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous out\n",
- dev->devnum, asifout, i);
- continue;
- }
- /* See USB audio formats manual, section 2 */
- fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifout, i);
- if (!fmt) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
- dev->devnum, asifout, i);
- continue;
- }
- if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n",
- dev->devnum, asifout, i);
- continue;
- }
- format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
- /* Dallas DS4201 workaround */
- if (le16_to_cpu(dev->descriptor.idVendor) == 0x04fa &&
- le16_to_cpu(dev->descriptor.idProduct) == 0x4201)
- format = (AFMT_S16_LE | AFMT_S8);
- fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifout, i);
- if (!fmt) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n",
- dev->devnum, asifout, i);
- continue;
- }
- if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n",
- dev->devnum, asifout, i);
- continue;
- }
- if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n",
- dev->devnum, asifout, i, fmt[4], fmt[5]);
- continue;
- }
- csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifout, i);
- if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
- printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n",
- dev->devnum, asifout, i);
- continue;
- }
- if (as->numfmtout >= MAXFORMATS)
- continue;
- fp = &as->fmtout[as->numfmtout++];
- if (fmt[5] == 2)
- format &= (AFMT_U16_LE | AFMT_S16_LE);
- else
- format &= (AFMT_U8 | AFMT_S8);
- if (fmt[4] == 2)
- format |= AFMT_STEREO;
- fp->format = format;
- fp->altsetting = i;
- fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
- printk(KERN_INFO "usbaudio: valid output sample rate %u\n", fp->sratelo);
- for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
- k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
- printk(KERN_INFO "usbaudio: valid output sample rate %u\n", k);
- if (k > fp->sratehi)
- fp->sratehi = k;
- if (k < fp->sratelo)
- fp->sratelo = k;
- }
- fp->attributes = csep[3];
- printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n",
- dev->devnum, asifout, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
- }
- }
- if (as->numfmtin == 0 && as->numfmtout == 0) {
- usb_free_urb(as->usbin.durb[0].urb);
- usb_free_urb(as->usbin.durb[1].urb);
- usb_free_urb(as->usbin.surb[0].urb);
- usb_free_urb(as->usbin.surb[1].urb);
- usb_free_urb(as->usbout.durb[0].urb);
- usb_free_urb(as->usbout.durb[1].urb);
- usb_free_urb(as->usbout.surb[0].urb);
- usb_free_urb(as->usbout.surb[1].urb);
- kfree(as);
- return;
- }
- if ((as->dev_audio = register_sound_dsp(&usb_audio_fops, -1)) < 0) {
- printk(KERN_ERR "usbaudio: cannot register dsp\n");
- usb_free_urb(as->usbin.durb[0].urb);
- usb_free_urb(as->usbin.durb[1].urb);
- usb_free_urb(as->usbin.surb[0].urb);
- usb_free_urb(as->usbin.surb[1].urb);
- usb_free_urb(as->usbout.durb[0].urb);
- usb_free_urb(as->usbout.durb[1].urb);
- usb_free_urb(as->usbout.surb[0].urb);
- usb_free_urb(as->usbout.surb[1].urb);
- kfree(as);
- return;
- }
- printk(KERN_INFO "usbaudio: registered dsp 14,%d\n", as->dev_audio);
- /* everything successful */
- list_add_tail(&as->list, &s->audiolist);
-}
-
-struct consmixstate {
- struct usb_audio_state *s;
- unsigned char *buffer;
- unsigned int buflen;
- unsigned int ctrlif;
- struct mixerchannel mixch[SOUND_MIXER_NRDEVICES];
- unsigned int nrmixch;
- unsigned int mixchmask;
- unsigned long unitbitmap[32/sizeof(unsigned long)];
- /* return values */
- unsigned int nrchannels;
- unsigned int termtype;
- unsigned int chconfig;
-};
-
-static struct mixerchannel *getmixchannel(struct consmixstate *state, unsigned int nr)
-{
- struct mixerchannel *c;
-
- if (nr >= SOUND_MIXER_NRDEVICES) {
- printk(KERN_ERR "usbaudio: invalid OSS mixer channel %u\n", nr);
- return NULL;
- }
- if (!(state->mixchmask & (1 << nr))) {
- printk(KERN_WARNING "usbaudio: OSS mixer channel %u already in use\n", nr);
- return NULL;
- }
- c = &state->mixch[state->nrmixch++];
- c->osschannel = nr;
- state->mixchmask &= ~(1 << nr);
- return c;
-}
-
-static unsigned int getvolchannel(struct consmixstate *state)
-{
- unsigned int u;
-
- if ((state->termtype & 0xff00) == 0x0000 && (state->mixchmask & SOUND_MASK_VOLUME))
- return SOUND_MIXER_VOLUME;
- if ((state->termtype & 0xff00) == 0x0100) {
- if (state->mixchmask & SOUND_MASK_PCM)
- return SOUND_MIXER_PCM;
- if (state->mixchmask & SOUND_MASK_ALTPCM)
- return SOUND_MIXER_ALTPCM;
- }
- if ((state->termtype & 0xff00) == 0x0200 && (state->mixchmask & SOUND_MASK_MIC))
- return SOUND_MIXER_MIC;
- if ((state->termtype & 0xff00) == 0x0300 && (state->mixchmask & SOUND_MASK_SPEAKER))
- return SOUND_MIXER_SPEAKER;
- if ((state->termtype & 0xff00) == 0x0500) {
- if (state->mixchmask & SOUND_MASK_PHONEIN)
- return SOUND_MIXER_PHONEIN;
- if (state->mixchmask & SOUND_MASK_PHONEOUT)
- return SOUND_MIXER_PHONEOUT;
- }
- if (state->termtype >= 0x710 && state->termtype <= 0x711 && (state->mixchmask & SOUND_MASK_RADIO))
- return SOUND_MIXER_RADIO;
- if (state->termtype >= 0x709 && state->termtype <= 0x70f && (state->mixchmask & SOUND_MASK_VIDEO))
- return SOUND_MIXER_VIDEO;
- u = ffs(state->mixchmask & (SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_LINE1 | SOUND_MASK_LINE2 | SOUND_MASK_LINE3 |
- SOUND_MASK_DIGITAL1 | SOUND_MASK_DIGITAL2 | SOUND_MASK_DIGITAL3));
- return u-1;
-}
-
-static void prepmixch(struct consmixstate *state)
-{
- struct usb_device *dev = state->s->usbdev;
- struct mixerchannel *ch;
- unsigned char *buf;
- __s16 v1;
- unsigned int v2, v3;
-
- if (!state->nrmixch || state->nrmixch > SOUND_MIXER_NRDEVICES)
- return;
- buf = kmalloc(sizeof(*buf) * 2, GFP_KERNEL);
- if (!buf) {
- printk(KERN_ERR "prepmixch: out of memory\n") ;
- return;
- }
-
- ch = &state->mixch[state->nrmixch-1];
- switch (ch->selector) {
- case 0: /* mixer unit request */
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
- goto err;
- ch->minval = buf[0] | (buf[1] << 8);
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
- goto err;
- ch->maxval = buf[0] | (buf[1] << 8);
- v2 = ch->maxval - ch->minval;
- if (!v2)
- v2 = 1;
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
- goto err;
- v1 = buf[0] | (buf[1] << 8);
- v3 = v1 - ch->minval;
- v3 = 100 * v3 / v2;
- if (v3 > 100)
- v3 = 100;
- ch->value = v3;
- if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
- state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
- goto err;
- v1 = buf[0] | (buf[1] << 8);
- v3 = v1 - ch->minval;
- v3 = 100 * v3 / v2;
- if (v3 > 100)
- v3 = 100;
- }
- ch->value |= v3 << 8;
- break;
-
- /* various feature unit controls */
- case VOLUME_CONTROL:
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
- goto err;
- ch->minval = buf[0] | (buf[1] << 8);
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
- goto err;
- ch->maxval = buf[0] | (buf[1] << 8);
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
- goto err;
- v1 = buf[0] | (buf[1] << 8);
- v2 = ch->maxval - ch->minval;
- v3 = v1 - ch->minval;
- if (!v2)
- v2 = 1;
- v3 = 100 * v3 / v2;
- if (v3 > 100)
- v3 = 100;
- ch->value = v3;
- if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
- goto err;
- v1 = buf[0] | (buf[1] << 8);
- v3 = v1 - ch->minval;
- v3 = 100 * v3 / v2;
- if (v3 > 100)
- v3 = 100;
- }
- ch->value |= v3 << 8;
- break;
-
- case BASS_CONTROL:
- case MID_CONTROL:
- case TREBLE_CONTROL:
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
- goto err;
- ch->minval = buf[0] << 8;
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
- goto err;
- ch->maxval = buf[0] << 8;
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
- goto err;
- v1 = buf[0] << 8;
- v2 = ch->maxval - ch->minval;
- v3 = v1 - ch->minval;
- if (!v2)
- v2 = 1;
- v3 = 100 * v3 / v2;
- if (v3 > 100)
- v3 = 100;
- ch->value = v3;
- if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
- if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
- (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
- goto err;
- v1 = buf[0] << 8;
- v3 = v1 - ch->minval;
- v3 = 100 * v3 / v2;
- if (v3 > 100)
- v3 = 100;
- }
- ch->value |= v3 << 8;
- break;
-
- default:
- goto err;
- }
-
- freebuf:
- kfree(buf);
- return;
- err:
- printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n",
- dev->devnum, state->ctrlif, ch->unitid, ch->chnum, ch->selector);
- if (state->nrmixch)
- state->nrmixch--;
- goto freebuf;
-}
-
-
-static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid);
-
-static inline int checkmixbmap(unsigned char *bmap, unsigned char flg, unsigned int inidx, unsigned int numoch)
-{
- unsigned int idx;
-
- idx = inidx*numoch;
- if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
- return 0;
- if (!(flg & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
- return 1;
- idx = (inidx+!!(flg & MIXFLG_STEREOIN))*numoch+!!(flg & MIXFLG_STEREOOUT);
- if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
- return 0;
- return 1;
-}
-
-static void usb_audio_mixerunit(struct consmixstate *state, unsigned char *mixer)
-{
- unsigned int nroutch = mixer[5+mixer[4]];
- unsigned int chidx[SOUND_MIXER_NRDEVICES+1];
- unsigned int termt[SOUND_MIXER_NRDEVICES];
- unsigned char flg = (nroutch >= 2) ? MIXFLG_STEREOOUT : 0;
- unsigned char *bmap = &mixer[9+mixer[4]];
- unsigned int bmapsize;
- struct mixerchannel *ch;
- unsigned int i;
-
- if (!mixer[4]) {
- printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor\n", mixer[3]);
- return;
- }
- if (mixer[4] > SOUND_MIXER_NRDEVICES) {
- printk(KERN_ERR "usbaudio: mixer unit %u: too many input pins\n", mixer[3]);
- return;
- }
- chidx[0] = 0;
- for (i = 0; i < mixer[4]; i++) {
- usb_audio_recurseunit(state, mixer[5+i]);
- chidx[i+1] = chidx[i] + state->nrchannels;
- termt[i] = state->termtype;
- }
- state->termtype = 0;
- state->chconfig = mixer[6+mixer[4]] | (mixer[7+mixer[4]] << 8);
- bmapsize = (nroutch * chidx[mixer[4]] + 7) >> 3;
- bmap += bmapsize - 1;
- if (mixer[0] < 10+mixer[4]+bmapsize) {
- printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor (bitmap too small)\n", mixer[3]);
- return;
- }
- for (i = 0; i < mixer[4]; i++) {
- state->termtype = termt[i];
- if (chidx[i+1]-chidx[i] >= 2) {
- flg |= MIXFLG_STEREOIN;
- if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
- ch = getmixchannel(state, getvolchannel(state));
- if (ch) {
- ch->unitid = mixer[3];
- ch->selector = 0;
- ch->chnum = chidx[i]+1;
- ch->flags = flg;
- prepmixch(state);
- }
- continue;
- }
- }
- flg &= ~MIXFLG_STEREOIN;
- if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
- ch = getmixchannel(state, getvolchannel(state));
- if (ch) {
- ch->unitid = mixer[3];
- ch->selector = 0;
- ch->chnum = chidx[i]+1;
- ch->flags = flg;
- prepmixch(state);
- }
- }
- }
- state->termtype = 0;
-}
-
-static struct mixerchannel *slctsrc_findunit(struct consmixstate *state, __u8 unitid)
-{
- unsigned int i;
-
- for (i = 0; i < state->nrmixch; i++)
- if (state->mixch[i].unitid == unitid)
- return &state->mixch[i];
- return NULL;
-}
-
-static void usb_audio_selectorunit(struct consmixstate *state, unsigned char *selector)
-{
- unsigned int chnum, i, mixch;
- struct mixerchannel *mch;
-
- if (!selector[4]) {
- printk(KERN_ERR "usbaudio: unit %u invalid SELECTOR_UNIT descriptor\n", selector[3]);
- return;
- }
- mixch = state->nrmixch;
- usb_audio_recurseunit(state, selector[5]);
- if (state->nrmixch != mixch) {
- mch = &state->mixch[state->nrmixch-1];
- mch->slctunitid = selector[3] | (1 << 8);
- } else if ((mch = slctsrc_findunit(state, selector[5]))) {
- mch->slctunitid = selector[3] | (1 << 8);
- } else {
- printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel 1\n", selector[3]);
- }
- chnum = state->nrchannels;
- for (i = 1; i < selector[4]; i++) {
- mixch = state->nrmixch;
- usb_audio_recurseunit(state, selector[5+i]);
- if (chnum != state->nrchannels) {
- printk(KERN_ERR "usbaudio: selector unit %u: input pins with varying channel numbers\n", selector[3]);
- state->termtype = 0;
- state->chconfig = 0;
- state->nrchannels = 0;
- return;
- }
- if (state->nrmixch != mixch) {
- mch = &state->mixch[state->nrmixch-1];
- mch->slctunitid = selector[3] | ((i + 1) << 8);
- } else if ((mch = slctsrc_findunit(state, selector[5+i]))) {
- mch->slctunitid = selector[3] | ((i + 1) << 8);
- } else {
- printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel %u\n", selector[3], i+1);
- }
- }
- state->termtype = 0;
- state->chconfig = 0;
-}
-
-/* in the future we might try to handle 3D etc. effect units */
-
-static void usb_audio_processingunit(struct consmixstate *state, unsigned char *proc)
-{
- unsigned int i;
-
- for (i = 0; i < proc[6]; i++)
- usb_audio_recurseunit(state, proc[7+i]);
- state->nrchannels = proc[7+proc[6]];
- state->termtype = 0;
- state->chconfig = proc[8+proc[6]] | (proc[9+proc[6]] << 8);
-}
-
-
-/* See Audio Class Spec, section 4.3.2.5 */
-static void usb_audio_featureunit(struct consmixstate *state, unsigned char *ftr)
-{
- struct mixerchannel *ch;
- unsigned short chftr, mchftr;
-#if 0
- struct usb_device *dev = state->s->usbdev;
- unsigned char data[1];
-#endif
- unsigned char nr_logical_channels, i;
-
- usb_audio_recurseunit(state, ftr[4]);
-
- if (ftr[5] == 0 ) {
- printk(KERN_ERR "usbaudio: wrong controls size in feature unit %u\n",ftr[3]);
- return;
- }
-
- if (state->nrchannels == 0) {
- printk(KERN_ERR "usbaudio: feature unit %u source has no channels\n", ftr[3]);
- return;
- }
- if (state->nrchannels > 2)
- printk(KERN_WARNING "usbaudio: feature unit %u: OSS mixer interface does not support more than 2 channels\n", ftr[3]);
-
- nr_logical_channels=(ftr[0]-7)/ftr[5]-1;
-
- if (nr_logical_channels != state->nrchannels) {
- printk(KERN_WARNING "usbaudio: warning: found %d of %d logical channels.\n", state->nrchannels,nr_logical_channels);
-
- if (state->nrchannels == 1 && nr_logical_channels==0) {
- printk(KERN_INFO "usbaudio: assuming the channel found is the master channel (got a Philips camera?). Should be fine.\n");
- } else if (state->nrchannels == 1 && nr_logical_channels==2) {
- printk(KERN_INFO "usbaudio: assuming that a stereo channel connected directly to a mixer is missing in search (got Labtec headset?). Should be fine.\n");
- state->nrchannels=nr_logical_channels;
- } else {
- printk(KERN_WARNING "usbaudio: no idea what's going on..., contact linux-usb-devel@lists.sourceforge.net\n");
- }
- }
-
- /* There is always a master channel */
- mchftr = ftr[6];
- /* Binary AND over logical channels if they exist */
- if (nr_logical_channels) {
- chftr = ftr[6+ftr[5]];
- for (i = 2; i <= nr_logical_channels; i++)
- chftr &= ftr[6+i*ftr[5]];
- } else {
- chftr = 0;
- }
-
- /* volume control */
- if (chftr & 2) {
- ch = getmixchannel(state, getvolchannel(state));
- if (ch) {
- ch->unitid = ftr[3];
- ch->selector = VOLUME_CONTROL;
- ch->chnum = 1;
- ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
- prepmixch(state);
- }
- } else if (mchftr & 2) {
- ch = getmixchannel(state, getvolchannel(state));
- if (ch) {
- ch->unitid = ftr[3];
- ch->selector = VOLUME_CONTROL;
- ch->chnum = 0;
- ch->flags = 0;
- prepmixch(state);
- }
- }
- /* bass control */
- if (chftr & 4) {
- ch = getmixchannel(state, SOUND_MIXER_BASS);
- if (ch) {
- ch->unitid = ftr[3];
- ch->selector = BASS_CONTROL;
- ch->chnum = 1;
- ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
- prepmixch(state);
- }
- } else if (mchftr & 4) {
- ch = getmixchannel(state, SOUND_MIXER_BASS);
- if (ch) {
- ch->unitid = ftr[3];
- ch->selector = BASS_CONTROL;
- ch->chnum = 0;
- ch->flags = 0;
- prepmixch(state);
- }
- }
- /* treble control */
- if (chftr & 16) {
- ch = getmixchannel(state, SOUND_MIXER_TREBLE);
- if (ch) {
- ch->unitid = ftr[3];
- ch->selector = TREBLE_CONTROL;
- ch->chnum = 1;
- ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
- prepmixch(state);
- }
- } else if (mchftr & 16) {
- ch = getmixchannel(state, SOUND_MIXER_TREBLE);
- if (ch) {
- ch->unitid = ftr[3];
- ch->selector = TREBLE_CONTROL;
- ch->chnum = 0;
- ch->flags = 0;
- prepmixch(state);
- }
- }
-#if 0
- /* if there are mute controls, unmute them */
- /* does not seem to be necessary, and the Dallas chip does not seem to support the "all" channel (255) */
- if ((chftr & 1) || (mchftr & 1)) {
- printk(KERN_DEBUG "usbaudio: unmuting feature unit %u interface %u\n", ftr[3], state->ctrlif);
- data[0] = 0;
- if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
- (MUTE_CONTROL << 8) | 0xff, state->ctrlif | (ftr[3] << 8), data, 1, 1000) < 0)
- printk(KERN_WARNING "usbaudio: failure to unmute feature unit %u interface %u\n", ftr[3], state->ctrlif);
- }
-#endif
-}
-
-static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid)
-{
- unsigned char *p1;
- unsigned int i, j;
-
- if (test_and_set_bit(unitid, state->unitbitmap)) {
- printk(KERN_INFO "usbaudio: mixer path revisits unit %d\n", unitid);
- return;
- }
- p1 = find_audiocontrol_unit(state->buffer, state->buflen, NULL, unitid, state->ctrlif);
- if (!p1) {
- printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
- return;
- }
- state->nrchannels = 0;
- state->termtype = 0;
- state->chconfig = 0;
- switch (p1[2]) {
- case INPUT_TERMINAL:
- if (p1[0] < 12) {
- printk(KERN_ERR "usbaudio: unit %u: invalid INPUT_TERMINAL descriptor\n", unitid);
- return;
- }
- state->nrchannels = p1[7];
- state->termtype = p1[4] | (p1[5] << 8);
- state->chconfig = p1[8] | (p1[9] << 8);
- return;
-
- case MIXER_UNIT:
- if (p1[0] < 10 || p1[0] < 10+p1[4]) {
- printk(KERN_ERR "usbaudio: unit %u: invalid MIXER_UNIT descriptor\n", unitid);
- return;
- }
- usb_audio_mixerunit(state, p1);
- return;
-
- case SELECTOR_UNIT:
- if (p1[0] < 6 || p1[0] < 6+p1[4]) {
- printk(KERN_ERR "usbaudio: unit %u: invalid SELECTOR_UNIT descriptor\n", unitid);
- return;
- }
- usb_audio_selectorunit(state, p1);
- return;
-
- case FEATURE_UNIT: /* See USB Audio Class Spec 4.3.2.5 */
- if (p1[0] < 7 || p1[0] < 7+p1[5]) {
- printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
- return;
- }
- usb_audio_featureunit(state, p1);
- return;
-
- case PROCESSING_UNIT:
- if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
- printk(KERN_ERR "usbaudio: unit %u: invalid PROCESSING_UNIT descriptor\n", unitid);
- return;
- }
- usb_audio_processingunit(state, p1);
- return;
-
- case EXTENSION_UNIT:
- if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
- printk(KERN_ERR "usbaudio: unit %u: invalid EXTENSION_UNIT descriptor\n", unitid);
- return;
- }
- for (j = i = 0; i < p1[6]; i++) {
- usb_audio_recurseunit(state, p1[7+i]);
- if (!i)
- j = state->termtype;
- else if (j != state->termtype)
- j = 0;
- }
- state->nrchannels = p1[7+p1[6]];
- state->chconfig = p1[8+p1[6]] | (p1[9+p1[6]] << 8);
- state->termtype = j;
- return;
-
- default:
- printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
- return;
- }
-}
-
-static void usb_audio_constructmixer(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif, unsigned char *oterm)
-{
- struct usb_mixerdev *ms;
- struct consmixstate state;
-
- memset(&state, 0, sizeof(state));
- state.s = s;
- state.nrmixch = 0;
- state.mixchmask = ~0;
- state.buffer = buffer;
- state.buflen = buflen;
- state.ctrlif = ctrlif;
- set_bit(oterm[3], state.unitbitmap); /* mark terminal ID as visited */
- printk(KERN_DEBUG "usbaudio: constructing mixer for Terminal %u type 0x%04x\n",
- oterm[3], oterm[4] | (oterm[5] << 8));
- usb_audio_recurseunit(&state, oterm[7]);
- if (!state.nrmixch) {
- printk(KERN_INFO "usbaudio: no mixer controls found for Terminal %u\n", oterm[3]);
- return;
- }
- if (!(ms = kmalloc(sizeof(struct usb_mixerdev)+state.nrmixch*sizeof(struct mixerchannel), GFP_KERNEL)))
- return;
- memset(ms, 0, sizeof(struct usb_mixerdev));
- memcpy(&ms->ch, &state.mixch, state.nrmixch*sizeof(struct mixerchannel));
- ms->state = s;
- ms->iface = ctrlif;
- ms->numch = state.nrmixch;
- if ((ms->dev_mixer = register_sound_mixer(&usb_mixer_fops, -1)) < 0) {
- printk(KERN_ERR "usbaudio: cannot register mixer\n");
- kfree(ms);
- return;
- }
- printk(KERN_INFO "usbaudio: registered mixer 14,%d\n", ms->dev_mixer);
- list_add_tail(&ms->list, &s->mixerlist);
-}
-
-/* arbitrary limit, we won't check more interfaces than this */
-#define USB_MAXINTERFACES 32
-
-static struct usb_audio_state *usb_audio_parsecontrol(struct usb_device *dev, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif)
-{
- struct usb_audio_state *s;
- struct usb_interface *iface;
- struct usb_host_interface *alt;
- unsigned char ifin[USB_MAXINTERFACES], ifout[USB_MAXINTERFACES];
- unsigned char *p1;
- unsigned int i, j, k, numifin = 0, numifout = 0;
-
- if (!(s = kmalloc(sizeof(struct usb_audio_state), GFP_KERNEL)))
- return NULL;
- memset(s, 0, sizeof(struct usb_audio_state));
- INIT_LIST_HEAD(&s->audiolist);
- INIT_LIST_HEAD(&s->mixerlist);
- s->usbdev = dev;
- s->count = 1;
-
- /* find audiocontrol interface */
- if (!(p1 = find_csinterface_descriptor(buffer, buflen, NULL, HEADER, ctrlif, -1))) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u no HEADER found\n",
- dev->devnum, ctrlif);
- goto ret;
- }
- if (p1[0] < 8 + p1[7]) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u HEADER error\n",
- dev->devnum, ctrlif);
- goto ret;
- }
- if (!p1[7])
- printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has no AudioStreaming and MidiStreaming interfaces\n",
- dev->devnum, ctrlif);
- for (i = 0; i < p1[7]; i++) {
- j = p1[8+i];
- iface = usb_ifnum_to_if(dev, j);
- if (!iface) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u does not exist\n",
- dev->devnum, ctrlif, j);
- continue;
- }
- if (iface->num_altsetting == 1) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u has only 1 altsetting.\n", dev->devnum, ctrlif);
- continue;
- }
- alt = usb_altnum_to_altsetting(iface, 0);
- if (!alt) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 0\n",
- dev->devnum, ctrlif, j);
- continue;
- }
- if (alt->desc.bInterfaceClass != USB_CLASS_AUDIO) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u is not an AudioClass interface\n",
- dev->devnum, ctrlif, j);
- continue;
- }
- if (alt->desc.bInterfaceSubClass == 3) {
- printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u interface %u MIDIStreaming not supported\n",
- dev->devnum, ctrlif, j);
- continue;
- }
- if (alt->desc.bInterfaceSubClass != 2) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u invalid AudioClass subtype\n",
- dev->devnum, ctrlif, j);
- continue;
- }
- if (alt->desc.bNumEndpoints > 0) {
- /* Check all endpoints; should they all have a bandwidth of 0 ? */
- for (k = 0; k < alt->desc.bNumEndpoints; k++) {
- if (le16_to_cpu(alt->endpoint[k].desc.wMaxPacketSize) > 0) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u endpoint %d does not have 0 bandwidth at alt[0]\n", dev->devnum, ctrlif, k);
- break;
- }
- }
- if (k < alt->desc.bNumEndpoints)
- continue;
- }
-
- alt = usb_altnum_to_altsetting(iface, 1);
- if (!alt) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 1\n",
- dev->devnum, ctrlif, j);
- continue;
- }
- if (alt->desc.bNumEndpoints < 1) {
- printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no endpoint\n",
- dev->devnum, ctrlif, j);
- continue;
- }
- /* note: this requires the data endpoint to be ep0 and the optional sync
- ep to be ep1, which seems to be the case */
- if (alt->endpoint[0].desc.bEndpointAddress & USB_DIR_IN) {
- if (numifin < USB_MAXINTERFACES) {
- ifin[numifin++] = j;
- usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
- }
- } else {
- if (numifout < USB_MAXINTERFACES) {
- ifout[numifout++] = j;
- usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
- }
- }
- }
- printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has %u input and %u output AudioStreaming interfaces\n",
- dev->devnum, ctrlif, numifin, numifout);
- for (i = 0; i < numifin && i < numifout; i++)
- usb_audio_parsestreaming(s, buffer, buflen, ifin[i], ifout[i]);
- for (j = i; j < numifin; j++)
- usb_audio_parsestreaming(s, buffer, buflen, ifin[i], -1);
- for (j = i; j < numifout; j++)
- usb_audio_parsestreaming(s, buffer, buflen, -1, ifout[i]);
- /* now walk through all OUTPUT_TERMINAL descriptors to search for mixers */
- p1 = find_csinterface_descriptor(buffer, buflen, NULL, OUTPUT_TERMINAL, ctrlif, -1);
- while (p1) {
- if (p1[0] >= 9)
- usb_audio_constructmixer(s, buffer, buflen, ctrlif, p1);
- p1 = find_csinterface_descriptor(buffer, buflen, p1, OUTPUT_TERMINAL, ctrlif, -1);
- }
-
-ret:
- if (list_empty(&s->audiolist) && list_empty(&s->mixerlist)) {
- kfree(s);
- return NULL;
- }
- /* everything successful */
- down(&open_sem);
- list_add_tail(&s->audiodev, &audiodevs);
- up(&open_sem);
- printk(KERN_DEBUG "usb_audio_parsecontrol: usb_audio_state at %p\n", s);
- return s;
-}
-
-/* we only care for the currently active configuration */
-
-static int usb_audio_probe(struct usb_interface *intf,
- const struct usb_device_id *id)
-{
- struct usb_device *dev = interface_to_usbdev (intf);
- struct usb_audio_state *s;
- unsigned char *buffer;
- unsigned int buflen;
-
-#if 0
- printk(KERN_DEBUG "usbaudio: Probing if %i: IC %x, ISC %x\n", ifnum,
- config->interface[ifnum].altsetting[0].desc.bInterfaceClass,
- config->interface[ifnum].altsetting[0].desc.bInterfaceSubClass);
-#endif
-
- /*
- * audiocontrol interface found
- * find which configuration number is active
- */
- buffer = dev->rawdescriptors[dev->actconfig - dev->config];
- buflen = le16_to_cpu(dev->actconfig->desc.wTotalLength);
- s = usb_audio_parsecontrol(dev, buffer, buflen, intf->altsetting->desc.bInterfaceNumber);
- if (s) {
- usb_set_intfdata (intf, s);
- return 0;
- }
- return -ENODEV;
-}
-
-
-/* a revoke facility would make things simpler */
-
-static void usb_audio_disconnect(struct usb_interface *intf)
-{
- struct usb_audio_state *s = usb_get_intfdata (intf);
- struct usb_audiodev *as;
- struct usb_mixerdev *ms;
-
- if (!s)
- return;
-
- /* we get called with -1 for every audiostreaming interface registered */
- if (s == (struct usb_audio_state *)-1) {
- dprintk((KERN_DEBUG "usbaudio: note, usb_audio_disconnect called with -1\n"));
- return;
- }
- if (!s->usbdev) {
- dprintk((KERN_DEBUG "usbaudio: error, usb_audio_disconnect already called for %p!\n", s));
- return;
- }
- down(&open_sem);
- list_del_init(&s->audiodev);
- s->usbdev = NULL;
- usb_set_intfdata (intf, NULL);
-
- /* deregister all audio and mixer devices, so no new processes can open this device */
- list_for_each_entry(as, &s->audiolist, list) {
- usbin_disc(as);
- usbout_disc(as);
- wake_up(&as->usbin.dma.wait);
- wake_up(&as->usbout.dma.wait);
- if (as->dev_audio >= 0) {
- unregister_sound_dsp(as->dev_audio);
- printk(KERN_INFO "usbaudio: unregister dsp 14,%d\n", as->dev_audio);
- }
- as->dev_audio = -1;
- }
- list_for_each_entry(ms, &s->mixerlist, list) {
- if (ms->dev_mixer >= 0) {
- unregister_sound_mixer(ms->dev_mixer);
- printk(KERN_INFO "usbaudio: unregister mixer 14,%d\n", ms->dev_mixer);
- }
- ms->dev_mixer = -1;
- }
- release(s);
- wake_up(&open_wait);
-}
-
-static int __init usb_audio_init(void)
-{
- int result = usb_register(&usb_audio_driver);
- if (result == 0)
- info(DRIVER_VERSION ":" DRIVER_DESC);
- return result;
-}
-
-
-static void __exit usb_audio_cleanup(void)
-{
- usb_deregister(&usb_audio_driver);
-}
-
-module_init(usb_audio_init);
-module_exit(usb_audio_cleanup);
-
-MODULE_AUTHOR( DRIVER_AUTHOR );
-MODULE_DESCRIPTION( DRIVER_DESC );
-MODULE_LICENSE("GPL");
-
+++ /dev/null
-/*
- usb-midi.c -- USB-MIDI driver
-
- Copyright (C) 2001
- NAGANO Daisuke <breeze.nagano@nifty.ne.jp>
-
- 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, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- This driver is based on:
- - 'Universal Serial Bus Device Class Definition for MIDI Device'
- - linux/drivers/sound/es1371.c, linux/drivers/usb/audio.c
- - alsa/lowlevel/pci/cs64xx.c
- - umidi.c for NetBSD
- */
-
-/* ------------------------------------------------------------------------- */
-
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/usb.h>
-#include <linux/poll.h>
-#include <linux/sound.h>
-#include <linux/init.h>
-#include <asm/semaphore.h>
-
-#include "usb-midi.h"
-
-/* ------------------------------------------------------------------------- */
-
-/* More verbose on syslog */
-#undef MIDI_DEBUG
-
-#define MIDI_IN_BUFSIZ 1024
-
-#define HAVE_SUPPORT_USB_MIDI_CLASS
-
-#undef HAVE_SUPPORT_ALSA
-
-/* ------------------------------------------------------------------------- */
-
-static int singlebyte = 0;
-module_param(singlebyte, int, 0);
-MODULE_PARM_DESC(singlebyte,"Enable sending MIDI messages with single message packet");
-
-static int maxdevices = 4;
-module_param(maxdevices, int, 0);
-MODULE_PARM_DESC(maxdevices,"Max number of allocatable MIDI device");
-
-static int uvendor = -1;
-module_param(uvendor, int, 0);
-MODULE_PARM_DESC(uvendor, "The USB Vendor ID of a semi-compliant interface");
-
-static int uproduct = -1;
-module_param(uproduct, int, 0);
-MODULE_PARM_DESC(uproduct, "The USB Product ID of a semi-compliant interface");
-
-static int uinterface = -1;
-module_param(uinterface, int, 0);
-MODULE_PARM_DESC(uinterface, "The Interface number of a semi-compliant interface");
-
-static int ualt = -1;
-module_param(ualt, int, 0);
-MODULE_PARM_DESC(ualt, "The optional alternative setting of a semi-compliant interface");
-
-static int umin = -1;
-module_param(umin, int, 0);
-MODULE_PARM_DESC(umin, "The input endpoint of a semi-compliant interface");
-
-static int umout = -1;
-module_param(umout, int, 0);
-MODULE_PARM_DESC(umout, "The output endpoint of a semi-compliant interface");
-
-static int ucable = -1;
-module_param(ucable, int, 0);
-MODULE_PARM_DESC(ucable, "The cable number used for a semi-compliant interface");
-
-/** Note -- the usb_string() returns only Latin-1 characters.
- * (unicode chars <= 255). To support Japanese, a unicode16LE-to-EUC or
- * unicode16LE-to-JIS routine is needed to wrap around usb_get_string().
- **/
-static unsigned short ulangid = 0x0409; /** 0x0411 for Japanese **/
-module_param(ulangid, ushort, 0);
-MODULE_PARM_DESC(ulangid, "The optional preferred USB Language ID for all devices");
-
-MODULE_AUTHOR("NAGANO Daisuke <breeze.nagano@nifty.ne.jp>");
-MODULE_DESCRIPTION("USB-MIDI driver");
-MODULE_LICENSE("GPL");
-
-/* ------------------------------------------------------------------------- */
-
-/** MIDIStreaming Class-Specific Interface Descriptor Subtypes **/
-
-#define MS_DESCRIPTOR_UNDEFINED 0
-#define MS_HEADER 1
-#define MIDI_IN_JACK 2
-#define MIDI_OUT_JACK 3
-/* Spec reads: ELEMENT */
-#define ELEMENT_DESCRIPTOR 4
-
-#define MS_HEADER_LENGTH 7
-
-/** MIDIStreaming Class-Specific Endpoint Descriptor Subtypes **/
-
-#define DESCRIPTOR_UNDEFINED 0
-/* Spec reads: MS_GENERAL */
-#define MS_GENERAL_ENDPOINT 1
-
-/** MIDIStreaming MIDI IN and OUT Jack Types **/
-
-#define JACK_TYPE_UNDEFINED 0
-/* Spec reads: EMBEDDED */
-#define EMBEDDED_JACK 1
-/* Spec reads: EXTERNAL */
-#define EXTERNAL_JACK 2
-
-
-/* structure summary
-
- usb_midi_state usb_device
- | |
- *| *| per ep
- in_ep out_ep
- | |
- *| *| per cable
- min mout
- | | (cable to device pairing magic)
- | |
- usb_midi_dev dev_id (major,minor) == file->private_data
-
-*/
-
-/* usb_midi_state: corresponds to a USB-MIDI module */
-struct usb_midi_state {
- struct list_head mididev;
-
- struct usb_device *usbdev;
-
- struct list_head midiDevList;
- struct list_head inEndpointList;
- struct list_head outEndpointList;
-
- spinlock_t lock;
-
- unsigned int count; /* usage counter */
-};
-
-/* midi_out_endpoint: corresponds to an output endpoint */
-struct midi_out_endpoint {
- struct list_head list;
-
- struct usb_device *usbdev;
- int endpoint;
- spinlock_t lock;
- wait_queue_head_t wait;
-
- unsigned char *buf;
- int bufWrPtr;
- int bufSize;
-
- struct urb *urb;
-};
-
-/* midi_in_endpoint: corresponds to an input endpoint */
-struct midi_in_endpoint {
- struct list_head list;
-
- struct usb_device *usbdev;
- int endpoint;
- spinlock_t lock;
- wait_queue_head_t wait;
-
- struct usb_mididev *cables[16]; // cables open for read
- int readers; // number of cables open for read
-
- struct urb *urb;
- unsigned char *recvBuf;
- int recvBufSize;
- int urbSubmitted; //FIXME: == readers > 0
-};
-
-/* usb_mididev: corresponds to a logical device */
-struct usb_mididev {
- struct list_head list;
-
- struct usb_midi_state *midi;
- int dev_midi;
- mode_t open_mode;
-
- struct {
- struct midi_in_endpoint *ep;
- int cableId;
-
-// as we are pushing data from usb_bulk_read to usb_midi_read,
-// we need a larger, cyclic buffer here.
- unsigned char buf[MIDI_IN_BUFSIZ];
- int bufRdPtr;
- int bufWrPtr;
- int bufRemains;
- } min;
-
- struct {
- struct midi_out_endpoint *ep;
- int cableId;
-
- unsigned char buf[3];
- int bufPtr;
- int bufRemains;
-
- int isInExclusive;
- unsigned char lastEvent;
- } mout;
-
- int singlebyte;
-};
-
-/** Map the high nybble of MIDI voice messages to number of Message bytes.
- * High nyble ranges from 0x8 to 0xe
- */
-
-static int remains_80e0[] = {
- 3, /** 0x8X Note Off **/
- 3, /** 0x9X Note On **/
- 3, /** 0xAX Poly-key pressure **/
- 3, /** 0xBX Control Change **/
- 2, /** 0xCX Program Change **/
- 2, /** 0xDX Channel pressure **/
- 3 /** 0xEX PitchBend Change **/
-};
-
-/** Map the messages to a number of Message bytes.
- *
- **/
-static int remains_f0f6[] = {
- 0, /** 0xF0 **/
- 2, /** 0XF1 **/
- 3, /** 0XF2 **/
- 2, /** 0XF3 **/
- 2, /** 0XF4 (Undefined by MIDI Spec, and subject to change) **/
- 2, /** 0XF5 (Undefined by MIDI Spec, and subject to change) **/
- 1 /** 0XF6 **/
-};
-
-/** Map the messages to a CIN (Code Index Number).
- *
- **/
-static int cin_f0ff[] = {
- 4, /** 0xF0 System Exclusive Message Start (special cases may be 6 or 7) */
- 2, /** 0xF1 **/
- 3, /** 0xF2 **/
- 2, /** 0xF3 **/
- 2, /** 0xF4 **/
- 2, /** 0xF5 **/
- 5, /** 0xF6 **/
- 5, /** 0xF7 End of System Exclusive Message (May be 6 or 7) **/
- 5, /** 0xF8 **/
- 5, /** 0xF9 **/
- 5, /** 0xFA **/
- 5, /** 0xFB **/
- 5, /** 0xFC **/
- 5, /** 0xFD **/
- 5, /** 0xFE **/
- 5 /** 0xFF **/
-};
-
-/** Map MIDIStreaming Event packet Code Index Number (low nybble of byte 0)
- * to the number of bytes of valid MIDI data.
- *
- * CIN of 0 and 1 are NOT USED in MIDIStreaming 1.0.
- *
- **/
-static int cin_to_len[] = {
- 0, 0, 2, 3,
- 3, 1, 2, 3,
- 3, 3, 3, 3,
- 2, 2, 3, 1
-};
-
-
-/* ------------------------------------------------------------------------- */
-
-static struct list_head mididevs = LIST_HEAD_INIT(mididevs);
-
-static DECLARE_MUTEX(open_sem);
-static DECLARE_WAIT_QUEUE_HEAD(open_wait);
-
-
-/* ------------------------------------------------------------------------- */
-
-static void usb_write_callback(struct urb *urb, struct pt_regs *regs)
-{
- struct midi_out_endpoint *ep = (struct midi_out_endpoint *)urb->context;
-
- if ( waitqueue_active( &ep->wait ) )
- wake_up_interruptible( &ep->wait );
-}
-
-
-static int usb_write( struct midi_out_endpoint *ep, unsigned char *buf, int len )
-{
- struct usb_device *d;
- int pipe;
- int ret = 0;
- int status;
- int maxretry = 50;
-
- DECLARE_WAITQUEUE(wait,current);
- init_waitqueue_head(&ep->wait);
-
- d = ep->usbdev;
- pipe = usb_sndbulkpipe(d, ep->endpoint);
- usb_fill_bulk_urb( ep->urb, d, pipe, (unsigned char*)buf, len,
- usb_write_callback, ep );
-
- status = usb_submit_urb(ep->urb, GFP_KERNEL);
-
- if (status) {
- printk(KERN_ERR "usbmidi: Cannot submit urb (%d)\n",status);
- ret = -EIO;
- goto error;
- }
-
- add_wait_queue( &ep->wait, &wait );
- set_current_state( TASK_INTERRUPTIBLE );
-
- while( ep->urb->status == -EINPROGRESS ) {
- if ( maxretry-- < 0 ) {
- printk(KERN_ERR "usbmidi: usb_bulk_msg timed out\n");
- ret = -ETIME;
- break;
- }
- interruptible_sleep_on_timeout( &ep->wait, 10 );
- }
- set_current_state( TASK_RUNNING );
- remove_wait_queue( &ep->wait, &wait );
-
-error:
- return ret;
-}
-
-
-/** Copy data from URB to In endpoint buf.
- * Discard if CIN == 0 or CIN = 1.
- *
- *
- **/
-
-static void usb_bulk_read(struct urb *urb, struct pt_regs *regs)
-{
- struct midi_in_endpoint *ep = (struct midi_in_endpoint *)(urb->context);
- unsigned char *data = urb->transfer_buffer;
- int i, j, wake;
-
- if ( !ep->urbSubmitted ) {
- return;
- }
-
- if ( (urb->status == 0) && (urb->actual_length > 0) ) {
- wake = 0;
- spin_lock( &ep->lock );
-
- for(j = 0; j < urb->actual_length; j += 4) {
- int cin = (data[j]>>0)&0xf;
- int cab = (data[j]>>4)&0xf;
- struct usb_mididev *cable = ep->cables[cab];
- if ( cable ) {
- int len = cin_to_len[cin]; /** length of MIDI data **/
- for (i = 0; i < len; i++) {
- cable->min.buf[cable->min.bufWrPtr] = data[1+i+j];
- cable->min.bufWrPtr = (cable->min.bufWrPtr+1)%MIDI_IN_BUFSIZ;
- if (cable->min.bufRemains < MIDI_IN_BUFSIZ)
- cable->min.bufRemains += 1;
- else /** need to drop data **/
- cable->min.bufRdPtr += (cable->min.bufRdPtr+1)%MIDI_IN_BUFSIZ;
- wake = 1;
- }
- }
- }
-
- spin_unlock ( &ep->lock );
- if ( wake ) {
- wake_up( &ep->wait );
- }
- }
-
- /* urb->dev must be reinitialized on 2.4.x kernels */
- urb->dev = ep->usbdev;
-
- urb->actual_length = 0;
- usb_submit_urb(urb, GFP_ATOMIC);
-}
-
-
-
-/* ------------------------------------------------------------------------- */
-
-/* This routine must be called with spin_lock */
-
-/** Wrapper around usb_write().
- * This routine must be called with spin_lock held on ep.
- * Called by midiWrite(), putOneMidiEvent(), and usb_midi_write();
- **/
-static int flush_midi_buffer( struct midi_out_endpoint *ep )
-{
- int ret=0;
-
- if ( ep->bufWrPtr > 0 ) {
- ret = usb_write( ep, ep->buf, ep->bufWrPtr );
- ep->bufWrPtr = 0;
- }
-
- return ret;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-
-/** Given a MIDI Event, determine size of data to be attached to
- * USB-MIDI packet.
- * Returns 1, 2 or 3.
- * Called by midiWrite();
- * Uses remains_80e0 and remains_f0f6;
- **/
-static int get_remains(int event)
-{
- int ret;
-
- if ( event < 0x80 ) {
- ret = 1;
- } else if ( event < 0xf0 ) {
- ret = remains_80e0[((event-0x80)>>4)&0x0f];
- } else if ( event < 0xf7 ) {
- ret = remains_f0f6[event-0xf0];
- } else {
- ret = 1;
- }
-
- return ret;
-}
-
-/** Given the output MIDI data in the output buffer, computes a reasonable
- * CIN.
- * Called by putOneMidiEvent().
- **/
-static int get_CIN( struct usb_mididev *m )
-{
- int cin;
-
- if ( m->mout.buf[0] == 0xf7 ) {
- cin = 5;
- }
- else if ( m->mout.buf[1] == 0xf7 ) {
- cin = 6;
- }
- else if ( m->mout.buf[2] == 0xf7 ) {
- cin = 7;
- }
- else {
- if ( m->mout.isInExclusive == 1 ) {
- cin = 4;
- } else if ( m->mout.buf[0] < 0x80 ) {
- /** One byte that we know nothing about. **/
- cin = 0xF;
- } else if ( m->mout.buf[0] < 0xf0 ) {
- /** MIDI Voice messages 0x8X to 0xEX map to cin 0x8 to 0xE. **/
- cin = (m->mout.buf[0]>>4)&0x0f;
- }
- else {
- /** Special lookup table exists for real-time events. **/
- cin = cin_f0ff[m->mout.buf[0]-0xf0];
- }
- }
-
- return cin;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-
-
-/** Move data to USB endpoint buffer.
- *
- **/
-static int put_one_midi_event(struct usb_mididev *m)
-{
- int cin;
- unsigned long flags;
- struct midi_out_endpoint *ep = m->mout.ep;
- int ret=0;
-
- cin = get_CIN( m );
- if ( cin > 0x0f || cin < 0 ) {
- return -EINVAL;
- }
-
- spin_lock_irqsave( &ep->lock, flags );
- ep->buf[ep->bufWrPtr++] = (m->mout.cableId<<4) | cin;
- ep->buf[ep->bufWrPtr++] = m->mout.buf[0];
- ep->buf[ep->bufWrPtr++] = m->mout.buf[1];
- ep->buf[ep->bufWrPtr++] = m->mout.buf[2];
- if ( ep->bufWrPtr >= ep->bufSize ) {
- ret = flush_midi_buffer( ep );
- }
- spin_unlock_irqrestore( &ep->lock, flags);
-
- m->mout.buf[0] = m->mout.buf[1] = m->mout.buf[2] = 0;
- m->mout.bufPtr = 0;
-
- return ret;
-}
-
-/** Write the MIDI message v on the midi device.
- * Called by usb_midi_write();
- * Responsible for packaging a MIDI data stream into USB-MIDI packets.
- **/
-
-static int midi_write( struct usb_mididev *m, int v )
-{
- unsigned long flags;
- struct midi_out_endpoint *ep = m->mout.ep;
- int ret=0;
- unsigned char c = (unsigned char)v;
- unsigned char sysrt_buf[4];
-
- if ( m->singlebyte != 0 ) {
- /** Simple code to handle the single-byte USB-MIDI protocol. */
- spin_lock_irqsave( &ep->lock, flags );
- if ( ep->bufWrPtr+4 > ep->bufSize ) {
- ret = flush_midi_buffer( ep );
- if ( !ret ) {
- spin_unlock_irqrestore( &ep->lock, flags );
- return ret;
- }
- }
- ep->buf[ep->bufWrPtr++] = (m->mout.cableId<<4) | 0x0f; /* single byte */
- ep->buf[ep->bufWrPtr++] = c;
- ep->buf[ep->bufWrPtr++] = 0;
- ep->buf[ep->bufWrPtr++] = 0;
- if ( ep->bufWrPtr >= ep->bufSize ) {
- ret = flush_midi_buffer( ep );
- }
- spin_unlock_irqrestore( &ep->lock, flags );
-
- return ret;
- }
- /** Normal USB-MIDI protocol begins here. */
-
- if ( c > 0xf7 ) { /* system: Realtime messages */
- /** Realtime messages are written IMMEDIATELY. */
- sysrt_buf[0] = (m->mout.cableId<<4) | 0x0f;
- sysrt_buf[1] = c;
- sysrt_buf[2] = 0;
- sysrt_buf[3] = 0;
- spin_lock_irqsave( &ep->lock, flags );
- ret = usb_write( ep, sysrt_buf, 4 );
- spin_unlock_irqrestore( &ep->lock, flags );
- /* m->mout.lastEvent = 0; */
-
- return ret;
- }
-
- if ( c >= 0x80 ) {
- if ( c < 0xf0 ) {
- m->mout.lastEvent = c;
- m->mout.isInExclusive = 0;
- m->mout.bufRemains = get_remains(c);
- } else if ( c == 0xf0 ) {
- /* m->mout.lastEvent = 0; */
- m->mout.isInExclusive = 1;
- m->mout.bufRemains = get_remains(c);
- } else if ( c == 0xf7 && m->mout.isInExclusive == 1 ) {
- /* m->mout.lastEvent = 0; */
- m->mout.isInExclusive = 0;
- m->mout.bufRemains = 1;
- } else if ( c > 0xf0 ) {
- /* m->mout.lastEvent = 0; */
- m->mout.isInExclusive = 0;
- m->mout.bufRemains = get_remains(c);
- }
-
- } else if ( m->mout.bufRemains == 0 && m->mout.isInExclusive == 0 ) {
- if ( m->mout.lastEvent == 0 ) {
- return 0; /* discard, waiting for the first event */
- }
- /** track status **/
- m->mout.buf[0] = m->mout.lastEvent;
- m->mout.bufPtr = 1;
- m->mout.bufRemains = get_remains(m->mout.lastEvent)-1;
- }
-
- m->mout.buf[m->mout.bufPtr++] = c;
- m->mout.bufRemains--;
- if ( m->mout.bufRemains == 0 || m->mout.bufPtr >= 3) {
- ret = put_one_midi_event(m);
- }
-
- return ret;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-/** Basic operation on /dev/midiXX as registered through struct file_operations.
- *
- * Basic contract: Used to change the current read/write position in a file.
- * On success, the non-negative position is reported.
- * On failure, the negative of an error code is reported.
- *
- * Because a MIDIStream is not a file, all seek operations are doomed to fail.
- *
- **/
-static loff_t usb_midi_llseek(struct file *file, loff_t offset, int origin)
-{
- /** Tell user you cannot seek on a PIPE-like device. **/
- return -ESPIPE;
-}
-
-
-/** Basic operation on /dev/midiXX as registered through struct file_operations.
- *
- * Basic contract: Block until count bytes have been read or an error occurs.
- *
- **/
-
-static ssize_t usb_midi_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
-{
- struct usb_mididev *m = (struct usb_mididev *)file->private_data;
- struct midi_in_endpoint *ep = m->min.ep;
- ssize_t ret;
- DECLARE_WAITQUEUE(wait, current);
-
- if ( !access_ok(VERIFY_READ, buffer, count) ) {
- return -EFAULT;
- }
- if ( count == 0 ) {
- return 0;
- }
-
- add_wait_queue( &ep->wait, &wait );
- ret = 0;
- while( count > 0 ) {
- int cnt;
- int d = (int)count;
-
- cnt = m->min.bufRemains;
- if ( cnt > d ) {
- cnt = d;
- }
-
- if ( cnt <= 0 ) {
- if ( file->f_flags & O_NONBLOCK ) {
- if (!ret)
- ret = -EAGAIN;
- break;
- }
- __set_current_state(TASK_INTERRUPTIBLE);
- schedule();
- if (signal_pending(current)) {
- if(!ret)
- ret=-ERESTARTSYS;
- break;
- }
- continue;
- }
-
- {
- int i;
- unsigned long flags; /* used to synchronize access to the endpoint */
- spin_lock_irqsave( &ep->lock, flags );
- for (i = 0; i < cnt; i++) {
- if ( copy_to_user( buffer+i, m->min.buf+m->min.bufRdPtr, 1 ) ) {
- if ( !ret )
- ret = -EFAULT;
- break;
- }
- m->min.bufRdPtr = (m->min.bufRdPtr+1)%MIDI_IN_BUFSIZ;
- m->min.bufRemains -= 1;
- }
- spin_unlock_irqrestore( &ep->lock, flags );
- }
-
- count-=cnt;
- buffer+=cnt;
- ret+=cnt;
-
- break;
- }
-
- remove_wait_queue( &ep->wait, &wait );
- set_current_state(TASK_RUNNING);
-
- return ret;
-}
-
-
-/** Basic operation on /dev/midiXX as registered through struct file_operations.
- *
- * Basic Contract: Take MIDI data byte-by-byte and pass it to
- * writeMidi() which packages MIDI data into USB-MIDI stream.
- * Then flushMidiData() is called to ensure all bytes have been written
- * in a timely fashion.
- *
- **/
-
-static ssize_t usb_midi_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
-{
- struct usb_mididev *m = (struct usb_mididev *)file->private_data;
- ssize_t ret;
- unsigned long int flags;
-
- if ( !access_ok(VERIFY_READ, buffer, count) ) {
- return -EFAULT;
- }
- if ( count == 0 ) {
- return 0;
- }
-
- ret = 0;
- while( count > 0 ) {
- unsigned char c;
-
- if (copy_from_user((unsigned char *)&c, buffer, 1)) {
- if ( ret == 0 )
- ret = -EFAULT;
- break;
- }
- if( midi_write(m, (int)c) ) {
- if ( ret == 0 )
- ret = -EFAULT;
- break;
- }
- count--;
- buffer++;
- ret++;
- }
-
- spin_lock_irqsave( &m->mout.ep->lock, flags );
- if ( flush_midi_buffer(m->mout.ep) < 0 ) {
- ret = -EFAULT;
- }
- spin_unlock_irqrestore( &m->mout.ep->lock, flags );
-
- return ret;
-}
-
-/** Basic operation on /dev/midiXX as registered through struct file_operations.
- *
- * Basic contract: Wait (spin) until ready to read or write on the file.
- *
- **/
-static unsigned int usb_midi_poll(struct file *file, struct poll_table_struct *wait)
-{
- struct usb_mididev *m = (struct usb_mididev *)file->private_data;
- struct midi_in_endpoint *iep = m->min.ep;
- struct midi_out_endpoint *oep = m->mout.ep;
- unsigned long flags;
- unsigned int mask = 0;
-
- if ( file->f_mode & FMODE_READ ) {
- poll_wait( file, &iep->wait, wait );
- spin_lock_irqsave( &iep->lock, flags );
- if ( m->min.bufRemains > 0 )
- mask |= POLLIN | POLLRDNORM;
- spin_unlock_irqrestore( &iep->lock, flags );
- }
-
- if ( file->f_mode & FMODE_WRITE ) {
- poll_wait( file, &oep->wait, wait );
- spin_lock_irqsave( &oep->lock, flags );
- if ( oep->bufWrPtr < oep->bufSize )
- mask |= POLLOUT | POLLWRNORM;
- spin_unlock_irqrestore( &oep->lock, flags );
- }
-
- return mask;
-}
-
-
-/** Basic operation on /dev/midiXX as registered through struct file_operations.
- *
- * Basic contract: This is always the first operation performed on the
- * device node. If no method is defined, the open succeeds without any
- * notification given to the module.
- *
- **/
-
-static int usb_midi_open(struct inode *inode, struct file *file)
-{
- int minor = iminor(inode);
- DECLARE_WAITQUEUE(wait, current);
- struct usb_midi_state *s;
- struct usb_mididev *m;
- unsigned long flags;
- int succeed = 0;
-
-#if 0
- printk(KERN_INFO "usb-midi: Open minor= %d.\n", minor);
-#endif
-
- for(;;) {
- down(&open_sem);
- list_for_each_entry(s, &mididevs, mididev) {
- list_for_each_entry(m, &s->midiDevList, list) {
- if ( !((m->dev_midi ^ minor) & ~0xf) )
- goto device_found;
- }
- }
- up(&open_sem);
- return -ENODEV;
-
- device_found:
- if ( !s->usbdev ) {
- up(&open_sem);
- return -EIO;
- }
- if ( !(m->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();
- remove_wait_queue( &open_wait, &wait );
- if ( signal_pending(current) ) {
- return -ERESTARTSYS;
- }
- }
-
- file->private_data = m;
- spin_lock_irqsave( &s->lock, flags );
-
- if ( !(m->open_mode & (FMODE_READ | FMODE_WRITE)) ) {
- //FIXME: intented semantics unclear here
- m->min.bufRdPtr = 0;
- m->min.bufWrPtr = 0;
- m->min.bufRemains = 0;
- spin_lock_init(&m->min.ep->lock);
-
- m->mout.bufPtr = 0;
- m->mout.bufRemains = 0;
- m->mout.isInExclusive = 0;
- m->mout.lastEvent = 0;
- spin_lock_init(&m->mout.ep->lock);
- }
-
- if ( (file->f_mode & FMODE_READ) && m->min.ep != NULL ) {
- unsigned long int flagsep;
- spin_lock_irqsave( &m->min.ep->lock, flagsep );
- m->min.ep->cables[m->min.cableId] = m;
- m->min.ep->readers += 1;
- m->min.bufRdPtr = 0;
- m->min.bufWrPtr = 0;
- m->min.bufRemains = 0;
- spin_unlock_irqrestore( &m->min.ep->lock, flagsep );
-
- if ( !(m->min.ep->urbSubmitted)) {
-
- /* urb->dev must be reinitialized on 2.4.x kernels */
- m->min.ep->urb->dev = m->min.ep->usbdev;
-
- if ( usb_submit_urb(m->min.ep->urb, GFP_ATOMIC) ) {
- printk(KERN_ERR "usbmidi: Cannot submit urb for MIDI-IN\n");
- }
- m->min.ep->urbSubmitted = 1;
- }
- m->open_mode |= FMODE_READ;
- succeed = 1;
- }
-
- if ( (file->f_mode & FMODE_WRITE) && m->mout.ep != NULL ) {
- m->mout.bufPtr = 0;
- m->mout.bufRemains = 0;
- m->mout.isInExclusive = 0;
- m->mout.lastEvent = 0;
- m->open_mode |= FMODE_WRITE;
- succeed = 1;
- }
-
- spin_unlock_irqrestore( &s->lock, flags );
-
- s->count++;
- up(&open_sem);
-
- /** Changed to prevent extra increments to USE_COUNT. **/
- if (!succeed) {
- return -EBUSY;
- }
-
-#if 0
- printk(KERN_INFO "usb-midi: Open Succeeded. minor= %d.\n", minor);
-#endif
-
- return nonseekable_open(inode, file); /** Success. **/
-}
-
-
-/** Basic operation on /dev/midiXX as registered through struct file_operations.
- *
- * Basic contract: Close an opened file and deallocate anything we allocated.
- * Like open(), this can be missing. If open set file->private_data,
- * release() must clear it.
- *
- **/
-
-static int usb_midi_release(struct inode *inode, struct file *file)
-{
- struct usb_mididev *m = (struct usb_mididev *)file->private_data;
- struct usb_midi_state *s = (struct usb_midi_state *)m->midi;
-
-#if 0
- printk(KERN_INFO "usb-midi: Close.\n");
-#endif
-
- down(&open_sem);
-
- if ( m->open_mode & FMODE_WRITE ) {
- m->open_mode &= ~FMODE_WRITE;
- usb_kill_urb( m->mout.ep->urb );
- }
-
- if ( m->open_mode & FMODE_READ ) {
- unsigned long int flagsep;
- spin_lock_irqsave( &m->min.ep->lock, flagsep );
- m->min.ep->cables[m->min.cableId] = NULL; // discard cable
- m->min.ep->readers -= 1;
- m->open_mode &= ~FMODE_READ;
- if ( m->min.ep->readers == 0 &&
- m->min.ep->urbSubmitted ) {
- m->min.ep->urbSubmitted = 0;
- usb_kill_urb(m->min.ep->urb);
- }
- spin_unlock_irqrestore( &m->min.ep->lock, flagsep );
- }
-
- s->count--;
-
- up(&open_sem);
- wake_up(&open_wait);
-
- file->private_data = NULL;
- return 0;
-}
-
-static struct file_operations usb_midi_fops = {
- .owner = THIS_MODULE,
- .llseek = usb_midi_llseek,
- .read = usb_midi_read,
- .write = usb_midi_write,
- .poll = usb_midi_poll,
- .open = usb_midi_open,
- .release = usb_midi_release,
-};
-
-/* ------------------------------------------------------------------------- */
-
-/** Returns filled midi_in_endpoint structure or null on failure.
- *
- * Parameters:
- * d - a usb_device
- * endPoint - An usb endpoint in the range 0 to 15.
- * Called by allocUsbMidiDev();
- *
- **/
-
-static struct midi_in_endpoint *alloc_midi_in_endpoint( struct usb_device *d, int endPoint )
-{
- struct midi_in_endpoint *ep;
- int bufSize;
- int pipe;
-
- endPoint &= 0x0f; /* Silently force endPoint to lie in range 0 to 15. */
-
- pipe = usb_rcvbulkpipe( d, endPoint );
- bufSize = usb_maxpacket( d, pipe, 0 );
- /* usb_pipein() = ! usb_pipeout() = true for an in Endpoint */
-
- ep = (struct midi_in_endpoint *)kmalloc(sizeof(struct midi_in_endpoint), GFP_KERNEL);
- if ( !ep ) {
- printk(KERN_ERR "usbmidi: no memory for midi in-endpoint\n");
- return NULL;
- }
- memset( ep, 0, sizeof(struct midi_in_endpoint) );
-// this sets cables[] and readers to 0, too.
-// for (i=0; i<16; i++) ep->cables[i] = 0; // discard cable
-// ep->readers = 0;
-
- ep->endpoint = endPoint;
-
- ep->recvBuf = (unsigned char *)kmalloc(sizeof(unsigned char)*(bufSize), GFP_KERNEL);
- if ( !ep->recvBuf ) {
- printk(KERN_ERR "usbmidi: no memory for midi in-endpoint buffer\n");
- kfree(ep);
- return NULL;
- }
-
- ep->urb = usb_alloc_urb(0, GFP_KERNEL); /* no ISO */
- if ( !ep->urb ) {
- printk(KERN_ERR "usbmidi: no memory for midi in-endpoint urb\n");
- kfree(ep->recvBuf);
- kfree(ep);
- return NULL;
- }
- usb_fill_bulk_urb( ep->urb, d,
- usb_rcvbulkpipe(d, endPoint),
- (unsigned char *)ep->recvBuf, bufSize,
- usb_bulk_read, ep );
-
- /* ep->bufRdPtr = 0; */
- /* ep->bufWrPtr = 0; */
- /* ep->bufRemains = 0; */
- /* ep->urbSubmitted = 0; */
- ep->recvBufSize = bufSize;
-
- init_waitqueue_head(&ep->wait);
-
- return ep;
-}
-
-static int remove_midi_in_endpoint( struct midi_in_endpoint *min )
-{
- usb_kill_urb( min->urb );
- usb_free_urb( min->urb );
- kfree( min->recvBuf );
- kfree( min );
-
- return 0;
-}
-
-/** Returns filled midi_out_endpoint structure or null on failure.
- *
- * Parameters:
- * d - a usb_device
- * endPoint - An usb endpoint in the range 0 to 15.
- * Called by allocUsbMidiDev();
- *
- **/
-static struct midi_out_endpoint *alloc_midi_out_endpoint( struct usb_device *d, int endPoint )
-{
- struct midi_out_endpoint *ep = NULL;
- int pipe;
- int bufSize;
-
- endPoint &= 0x0f;
- pipe = usb_sndbulkpipe( d, endPoint );
- bufSize = usb_maxpacket( d, pipe, 1 );
-
- ep = (struct midi_out_endpoint *)kmalloc(sizeof(struct midi_out_endpoint), GFP_KERNEL);
- if ( !ep ) {
- printk(KERN_ERR "usbmidi: no memory for midi out-endpoint\n");
- return NULL;
- }
- memset( ep, 0, sizeof(struct midi_out_endpoint) );
-
- ep->endpoint = endPoint;
- ep->buf = (unsigned char *)kmalloc(sizeof(unsigned char)*bufSize, GFP_KERNEL);
- if ( !ep->buf ) {
- printk(KERN_ERR "usbmidi: no memory for midi out-endpoint buffer\n");
- kfree(ep);
- return NULL;
- }
-
- ep->urb = usb_alloc_urb(0, GFP_KERNEL); /* no ISO */
- if ( !ep->urb ) {
- printk(KERN_ERR "usbmidi: no memory for midi out-endpoint urb\n");
- kfree(ep->buf);
- kfree(ep);
- return NULL;
- }
-
- ep->bufSize = bufSize;
- /* ep->bufWrPtr = 0; */
-
- init_waitqueue_head(&ep->wait);
-
- return ep;
-}
-
-
-static int remove_midi_out_endpoint( struct midi_out_endpoint *mout )
-{
- usb_kill_urb( mout->urb );
- usb_free_urb( mout->urb );
- kfree( mout->buf );
- kfree( mout );
-
- return 0;
-}
-
-
-/** Returns a filled usb_mididev structure, registered as a Linux MIDI device.
- *
- * Returns null if memory is not available or the device cannot be registered.
- * Called by allocUsbMidiDev();
- *
- **/
-static struct usb_mididev *allocMidiDev(
- struct usb_midi_state *s,
- struct midi_in_endpoint *min,
- struct midi_out_endpoint *mout,
- int inCableId,
- int outCableId )
-{
- struct usb_mididev *m;
-
- m = (struct usb_mididev *)kmalloc(sizeof(struct usb_mididev), GFP_KERNEL);
- if (!m) {
- printk(KERN_ERR "usbmidi: no memory for midi device\n");
- return NULL;
- }
-
- memset(m, 0, sizeof(struct usb_mididev));
-
- if ((m->dev_midi = register_sound_midi(&usb_midi_fops, -1)) < 0) {
- printk(KERN_ERR "usbmidi: cannot register midi device\n");
- kfree(m);
- return NULL;
- }
-
- m->midi = s;
- /* m->open_mode = 0; */
-
- if ( min ) {
- m->min.ep = min;
- m->min.ep->usbdev = s->usbdev;
- m->min.cableId = inCableId;
- }
- /* m->min.bufPtr = 0; */
- /* m->min.bufRemains = 0; */
-
- if ( mout ) {
- m->mout.ep = mout;
- m->mout.ep->usbdev = s->usbdev;
- m->mout.cableId = outCableId;
- }
- /* m->mout.bufPtr = 0; */
- /* m->mout.bufRemains = 0; */
- /* m->mout.isInExclusive = 0; */
- /* m->mout.lastEvent = 0; */
-
- m->singlebyte = singlebyte;
-
- return m;
-}
-
-
-static void release_midi_device( struct usb_midi_state *s )
-{
- struct usb_mididev *m;
- struct midi_in_endpoint *min;
- struct midi_out_endpoint *mout;
-
- if ( s->count > 0 ) {
- up(&open_sem);
- return;
- }
- up( &open_sem );
- wake_up( &open_wait );
-
- while(!list_empty(&s->inEndpointList)) {
- min = list_entry(s->inEndpointList.next, struct midi_in_endpoint, list);
- list_del(&min->list);
- remove_midi_in_endpoint(min);
- }
-
- while(!list_empty(&s->outEndpointList)) {
- mout = list_entry(s->outEndpointList.next, struct midi_out_endpoint, list);
- list_del(&mout->list);
- remove_midi_out_endpoint(mout);
- }
-
- while(!list_empty(&s->midiDevList)) {
- m = list_entry(s->midiDevList.next, struct usb_mididev, list);
- list_del(&m->list);
- kfree(m);
- }
-
- kfree(s);
-
- return;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-/** Utility routine to find a descriptor in a dump of many descriptors.
- * Returns start of descriptor or NULL if not found.
- * descStart pointer to list of interfaces.
- * descLength length (in bytes) of dump
- * after (ignored if NULL) this routine returns only descriptors after "after"
- * dtype (mandatory) The descriptor type.
- * iface (ignored if -1) returns descriptor at/following given interface
- * altSetting (ignored if -1) returns descriptor at/following given altSetting
- *
- *
- * Called by parseDescriptor(), find_csinterface_descriptor();
- *
- */
-static void *find_descriptor( void *descStart, unsigned int descLength, void *after, unsigned char dtype, int iface, int altSetting )
-{
- unsigned char *p, *end, *next;
- int interfaceNumber = -1, altSet = -1;
-
- p = descStart;
- end = p + descLength;
- for( ; p < end; ) {
- if ( p[0] < 2 )
- return NULL;
- next = p + p[0];
- if ( next > end )
- return NULL;
- if ( p[1] == USB_DT_INTERFACE ) {
- if ( p[0] < USB_DT_INTERFACE_SIZE )
- return NULL;
- interfaceNumber = p[2];
- altSet = p[3];
- }
- if ( p[1] == dtype &&
- ( !after || ( p > (unsigned char *)after) ) &&
- ( ( iface == -1) || (iface == interfaceNumber) ) &&
- ( (altSetting == -1) || (altSetting == altSet) )) {
- return p;
- }
- p = next;
- }
- return NULL;
-}
-
-/** Utility to find a class-specific interface descriptor.
- * dsubtype is a descriptor subtype
- * Called by parseDescriptor();
- **/
-static void *find_csinterface_descriptor(void *descStart, unsigned int descLength, void *after, u8 dsubtype, int iface, int altSetting)
-{
- unsigned char *p;
-
- p = find_descriptor( descStart, descLength, after, USB_DT_CS_INTERFACE, iface, altSetting );
- while ( p ) {
- if ( p[0] >= 3 && p[2] == dsubtype )
- return p;
- p = find_descriptor( descStart, descLength, p, USB_DT_CS_INTERFACE,
- iface, altSetting );
- }
- return NULL;
-}
-
-
-/** The magic of making a new usb_midi_device from config happens here.
- *
- * The caller is responsible for free-ing this return value (if not NULL).
- *
- **/
-static struct usb_midi_device *parse_descriptor( struct usb_device *d, unsigned char *buffer, int bufSize, unsigned int ifnum , unsigned int altSetting, int quirks)
-{
- struct usb_midi_device *u;
- unsigned char *p1;
- unsigned char *p2;
- unsigned char *next;
- int iep, oep;
- int length;
- unsigned long longBits;
- int pins, nbytes, offset, shift, jack;
-#ifdef HAVE_JACK_STRINGS
- /** Jacks can have associated names. **/
- unsigned char jack2string[256];
-#endif
-
- u = NULL;
- /* find audiocontrol interface */
- p1 = find_csinterface_descriptor( buffer, bufSize, NULL,
- MS_HEADER, ifnum, altSetting);
-
- if ( !p1 ) {
- goto error_end;
- }
-
- if ( p1[0] < MS_HEADER_LENGTH ) {
- goto error_end;
- }
-
- /* Assume success. Since the device corresponds to USB-MIDI spec, we assume
- that the rest of the USB 2.0 spec is obeyed. */
-
- u = (struct usb_midi_device *)kmalloc( sizeof(struct usb_midi_device), GFP_KERNEL );
- if ( !u ) {
- return NULL;
- }
- u->deviceName = NULL;
- u->idVendor = le16_to_cpu(d->descriptor.idVendor);
- u->idProduct = le16_to_cpu(d->descriptor.idProduct);
- u->interface = ifnum;
- u->altSetting = altSetting;
- u->in[0].endpoint = -1;
- u->in[0].cableId = -1;
- u->out[0].endpoint = -1;
- u->out[0].cableId = -1;
-
-
- printk(KERN_INFO "usb-midi: Found MIDIStreaming device corresponding to Release %d.%02d of spec.\n",
- (p1[4] >> 4) * 10 + (p1[4] & 0x0f ),
- (p1[3] >> 4) * 10 + (p1[3] & 0x0f )
- );
-
- length = p1[5] | (p1[6] << 8);
-
-#ifdef HAVE_JACK_STRINGS
- memset(jack2string, 0, sizeof(unsigned char) * 256);
-#endif
-
- length -= p1[0];
- for (p2 = p1 + p1[0]; length > 0; p2 = next) {
- next = p2 + p2[0];
- length -= p2[0];
-
- if (p2[0] < 2 )
- break;
- if (p2[1] != USB_DT_CS_INTERFACE)
- break;
- if (p2[2] == MIDI_IN_JACK && p2[0] >= 6 ) {
- jack = p2[4];
-#ifdef HAVE_JACK_STRINGS
- jack2string[jack] = p2[5];
-#endif
- printk(KERN_INFO "usb-midi: Found IN Jack 0x%02x %s\n",
- jack, (p2[3] == EMBEDDED_JACK)?"EMBEDDED":"EXTERNAL" );
- } else if ( p2[2] == MIDI_OUT_JACK && p2[0] >= 6) {
- pins = p2[5];
- if ( p2[0] < (6 + 2 * pins) )
- continue;
- jack = p2[4];
-#ifdef HAVE_JACK_STRINGS
- jack2string[jack] = p2[5 + 2 * pins];
-#endif
- printk(KERN_INFO "usb-midi: Found OUT Jack 0x%02x %s, %d pins\n",
- jack, (p2[3] == EMBEDDED_JACK)?"EMBEDDED":"EXTERNAL", pins );
- } else if ( p2[2] == ELEMENT_DESCRIPTOR && p2[0] >= 10) {
- pins = p2[4];
- if ( p2[0] < (9 + 2 * pins ) )
- continue;
- nbytes = p2[8 + 2 * pins ];
- if ( p2[0] < (10 + 2 * pins + nbytes) )
- continue;
- longBits = 0L;
- for ( offset = 0, shift = 0; offset < nbytes && offset < 8; offset ++, shift += 8) {
- longBits |= ((long)(p2[9 + 2 * pins + offset])) << shift;
- }
- jack = p2[3];
-#ifdef HAVE_JACK_STRINGS
- jack2string[jack] = p2[9 + 2 * pins + nbytes];
-#endif
- printk(KERN_INFO "usb-midi: Found ELEMENT 0x%02x, %d/%d pins in/out, bits: 0x%016lx\n",
- jack, pins, (int)(p2[5 + 2 * pins]), (long)longBits );
- } else {
- }
- }
-
- iep=0;
- oep=0;
-
- if (quirks==0) {
- /* MIDISTREAM */
- p2 = NULL;
- for (p1 = find_descriptor(buffer, bufSize, NULL, USB_DT_ENDPOINT,
- ifnum, altSetting ); p1; p1 = next ) {
- next = find_descriptor(buffer, bufSize, p1, USB_DT_ENDPOINT,
- ifnum, altSetting );
- p2 = find_descriptor(buffer, bufSize, p1, USB_DT_CS_ENDPOINT,
- ifnum, altSetting );
-
- if ( p2 && next && ( p2 > next ) )
- p2 = NULL;
-
- if ( p1[0] < 9 || !p2 || p2[0] < 4 )
- continue;
-
- if ( (p1[2] & 0x80) == 0x80 ) {
- if ( iep < 15 ) {
- pins = p2[3]; /* not pins -- actually "cables" */
- if ( pins > 16 )
- pins = 16;
- u->in[iep].endpoint = p1[2];
- u->in[iep].cableId = ( 1 << pins ) - 1;
- if ( u->in[iep].cableId )
- iep ++;
- if ( iep < 15 ) {
- u->in[iep].endpoint = -1;
- u->in[iep].cableId = -1;
- }
- }
- } else {
- if ( oep < 15 ) {
- pins = p2[3]; /* not pins -- actually "cables" */
- if ( pins > 16 )
- pins = 16;
- u->out[oep].endpoint = p1[2];
- u->out[oep].cableId = ( 1 << pins ) - 1;
- if ( u->out[oep].cableId )
- oep ++;
- if ( oep < 15 ) {
- u->out[oep].endpoint = -1;
- u->out[oep].cableId = -1;
- }
- }
- }
-
- }
- } else if (quirks==1) {
- /* YAMAHA quirks */
- for (p1 = find_descriptor(buffer, bufSize, NULL, USB_DT_ENDPOINT,
- ifnum, altSetting ); p1; p1 = next ) {
- next = find_descriptor(buffer, bufSize, p1, USB_DT_ENDPOINT,
- ifnum, altSetting );
-
- if ( p1[0] < 7 )
- continue;
-
- if ( (p1[2] & 0x80) == 0x80 ) {
- if ( iep < 15 ) {
- pins = iep+1;
- if ( pins > 16 )
- pins = 16;
- u->in[iep].endpoint = p1[2];
- u->in[iep].cableId = ( 1 << pins ) - 1;
- if ( u->in[iep].cableId )
- iep ++;
- if ( iep < 15 ) {
- u->in[iep].endpoint = -1;
- u->in[iep].cableId = -1;
- }
- }
- } else {
- if ( oep < 15 ) {
- pins = oep+1;
- u->out[oep].endpoint = p1[2];
- u->out[oep].cableId = ( 1 << pins ) - 1;
- if ( u->out[oep].cableId )
- oep ++;
- if ( oep < 15 ) {
- u->out[oep].endpoint = -1;
- u->out[oep].cableId = -1;
- }
- }
- }
-
- }
- }
-
- if ( !iep && ! oep ) {
- goto error_end;
- }
-
- return u;
-
-error_end:
- kfree(u);
- return NULL;
-}
-
-/* ------------------------------------------------------------------------- */
-
-/** Returns number between 0 and 16.
- *
- **/
-static int on_bits( unsigned short v )
-{
- int i;
- int ret=0;
-
- for ( i=0 ; i<16 ; i++ ) {
- if ( v & (1<<i) )
- ret++;
- }
-
- return ret;
-}
-
-
-/** USB-device will be interrogated for altSetting.
- *
- * Returns negative on error.
- * Called by allocUsbMidiDev();
- *
- **/
-
-static int get_alt_setting( struct usb_device *d, int ifnum )
-{
- int alts, alt=0;
- struct usb_interface *iface;
- struct usb_host_interface *interface;
- struct usb_endpoint_descriptor *ep;
- int epin, epout;
- int i;
-
- iface = usb_ifnum_to_if( d, ifnum );
- alts = iface->num_altsetting;
-
- for ( alt=0 ; alt<alts ; alt++ ) {
- interface = &iface->altsetting[alt];
- epin = -1;
- epout = -1;
-
- for ( i=0 ; i<interface->desc.bNumEndpoints ; i++ ) {
- ep = &interface->endpoint[i].desc;
- if ( (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK ) {
- continue;
- }
- if ( (ep->bEndpointAddress & USB_DIR_IN) && epin < 0 ) {
- epin = i;
- } else if ( epout < 0 ) {
- epout = i;
- }
- if ( epin >= 0 && epout >= 0 ) {
- return interface->desc.bAlternateSetting;
- }
- }
- }
-
- return -ENODEV;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-
-/** Returns 0 if successful in allocating and registering internal structures.
- * Returns negative on failure.
- * Calls allocMidiDev which additionally registers /dev/midiXX devices.
- * Writes messages on success to indicate which /dev/midiXX is which physical
- * endpoint.
- *
- **/
-static int alloc_usb_midi_device( struct usb_device *d, struct usb_midi_state *s, struct usb_midi_device *u )
-{
- struct usb_mididev **mdevs=NULL;
- struct midi_in_endpoint *mins[15], *min;
- struct midi_out_endpoint *mouts[15], *mout;
- int inDevs=0, outDevs=0;
- int inEndpoints=0, outEndpoints=0;
- int inEndpoint, outEndpoint;
- int inCableId, outCableId;
- int i;
- int devices = 0;
- int alt = 0;
-
- /* Obtain altSetting or die.. */
- alt = u->altSetting;
- if ( alt < 0 ) {
- alt = get_alt_setting( d, u->interface );
- }
- if ( alt < 0 )
- return -ENXIO;
-
- /* Configure interface */
- if ( usb_set_interface( d, u->interface, alt ) < 0 ) {
- return -ENXIO;
- }
-
- for ( i = 0 ; i < 15 ; i++ ) {
- mins[i] = NULL;
- mouts[i] = NULL;
- }
-
- /* Begin Allocation */
- while( inEndpoints < 15
- && inDevs < maxdevices
- && u->in[inEndpoints].cableId >= 0 ) {
- inDevs += on_bits((unsigned short)u->in[inEndpoints].cableId);
- mins[inEndpoints] = alloc_midi_in_endpoint( d, u->in[inEndpoints].endpoint );
- if ( mins[inEndpoints] == NULL )
- goto error_end;
- inEndpoints++;
- }
-
- while( outEndpoints < 15
- && outDevs < maxdevices
- && u->out[outEndpoints].cableId >= 0 ) {
- outDevs += on_bits((unsigned short)u->out[outEndpoints].cableId);
- mouts[outEndpoints] = alloc_midi_out_endpoint( d, u->out[outEndpoints].endpoint );
- if ( mouts[outEndpoints] == NULL )
- goto error_end;
- outEndpoints++;
- }
-
- devices = inDevs > outDevs ? inDevs : outDevs;
- devices = maxdevices > devices ? devices : maxdevices;
-
- /* obtain space for device name (iProduct) if not known. */
- if ( ! u->deviceName ) {
- mdevs = (struct usb_mididev **)
- kmalloc(sizeof(struct usb_mididevs *)*devices
- + sizeof(char) * 256, GFP_KERNEL);
- } else {
- mdevs = (struct usb_mididev **)
- kmalloc(sizeof(struct usb_mididevs *)*devices, GFP_KERNEL);
- }
-
- if ( !mdevs ) {
- /* devices = 0; */
- /* mdevs = NULL; */
- goto error_end;
- }
- for ( i=0 ; i<devices ; i++ ) {
- mdevs[i] = NULL;
- }
-
- /* obtain device name (iProduct) if not known. */
- if ( ! u->deviceName ) {
- u->deviceName = (char *) (mdevs + devices);
- if ( ! d->have_langid && d->descriptor.iProduct) {
- alt = usb_get_string(d, 0, 0, u->deviceName, 250);
- if (alt < 0) {
- printk(KERN_INFO "error getting string descriptor 0 (error=%d)\n", alt);
- } else if (u->deviceName[0] < 4) {
- printk(KERN_INFO "string descriptor 0 too short (length = %d)\n", alt);
- } else {
- printk(KERN_INFO "string descriptor 0 found (length = %d)\n", alt);
- for(; alt >= 4; alt -= 2) {
- i = u->deviceName[alt-2] | (u->deviceName[alt-1]<< 8);
- printk(KERN_INFO "usb-midi: langid(%d) 0x%04x\n",
- (alt-4) >> 1, i);
- if ( ( ( i ^ ulangid ) & 0xff ) == 0 ) {
- d->have_langid = 1;
- d->string_langid = i;
- printk(KERN_INFO "usb-midi: langid(match) 0x%04x\n", i);
- if ( i == ulangid )
- break;
- }
- }
- }
- }
- u->deviceName[0] = (char) 0;
- if (d->descriptor.iProduct) {
- printk(KERN_INFO "usb-midi: fetchString(%d)\n", d->descriptor.iProduct);
- alt = usb_string(d, d->descriptor.iProduct, u->deviceName, 255);
- if( alt < 0 ) {
- u->deviceName[0] = (char) 0;
- }
- printk(KERN_INFO "usb-midi: fetchString = %d\n", alt);
- }
- /* Failsafe */
- if ( !u->deviceName[0] ) {
- if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_ROLAND ) {
- strcpy(u->deviceName, "Unknown Roland");
- } else if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_STEINBERG ) {
- strcpy(u->deviceName, "Unknown Steinberg");
- } else if (le16_to_cpu(d->descriptor.idVendor) == USB_VENDOR_ID_YAMAHA ) {
- strcpy(u->deviceName, "Unknown Yamaha");
- } else {
- strcpy(u->deviceName, "Unknown");
- }
- }
- }
-
- inEndpoint = 0; inCableId = -1;
- outEndpoint = 0; outCableId = -1;
-
- for ( i=0 ; i<devices ; i++ ) {
- for ( inCableId ++ ;
- inEndpoint <15
- && mins[inEndpoint]
- && !(u->in[inEndpoint].cableId & (1<<inCableId)) ;
- inCableId++ ) {
- if ( inCableId >= 16 ) {
- inEndpoint ++;
- inCableId = 0;
- }
- }
- min = mins[inEndpoint];
- for ( outCableId ++ ;
- outEndpoint <15
- && mouts[outEndpoint]
- && !(u->out[outEndpoint].cableId & (1<<outCableId)) ;
- outCableId++ ) {
- if ( outCableId >= 16 ) {
- outEndpoint ++;
- outCableId = 0;
- }
- }
- mout = mouts[outEndpoint];
-
- mdevs[i] = allocMidiDev( s, min, mout, inCableId, outCableId );
- if ( mdevs[i] == NULL )
- goto error_end;
-
- }
-
- /* Success! */
- for ( i=0 ; i<devices ; i++ ) {
- list_add_tail( &mdevs[i]->list, &s->midiDevList );
- }
- for ( i=0 ; i<inEndpoints ; i++ ) {
- list_add_tail( &mins[i]->list, &s->inEndpointList );
- }
- for ( i=0 ; i<outEndpoints ; i++ ) {
- list_add_tail( &mouts[i]->list, &s->outEndpointList );
- }
-
- printk(KERN_INFO "usbmidi: found [ %s ] (0x%04x:0x%04x), attached:\n", u->deviceName, u->idVendor, u->idProduct );
- for ( i=0 ; i<devices ; i++ ) {
- int dm = (mdevs[i]->dev_midi-2)>>4;
- if ( mdevs[i]->mout.ep != NULL && mdevs[i]->min.ep != NULL ) {
- printk(KERN_INFO "usbmidi: /dev/midi%02d: in (ep:%02x cid:%2d bufsiz:%2d) out (ep:%02x cid:%2d bufsiz:%2d)\n",
- dm,
- mdevs[i]->min.ep->endpoint|USB_DIR_IN, mdevs[i]->min.cableId, mdevs[i]->min.ep->recvBufSize,
- mdevs[i]->mout.ep->endpoint, mdevs[i]->mout.cableId, mdevs[i]->mout.ep->bufSize);
- } else if ( mdevs[i]->min.ep != NULL ) {
- printk(KERN_INFO "usbmidi: /dev/midi%02d: in (ep:%02x cid:%2d bufsiz:%02d)\n",
- dm,
- mdevs[i]->min.ep->endpoint|USB_DIR_IN, mdevs[i]->min.cableId, mdevs[i]->min.ep->recvBufSize);
- } else if ( mdevs[i]->mout.ep != NULL ) {
- printk(KERN_INFO "usbmidi: /dev/midi%02d: out (ep:%02x cid:%2d bufsiz:%02d)\n",
- dm,
- mdevs[i]->mout.ep->endpoint, mdevs[i]->mout.cableId, mdevs[i]->mout.ep->bufSize);
- }
- }
-
- kfree(mdevs);
- return 0;
-
- error_end:
- if ( mdevs != NULL ) {
- for ( i=0 ; i<devices ; i++ ) {
- if ( mdevs[i] != NULL ) {
- unregister_sound_midi( mdevs[i]->dev_midi );
- kfree(mdevs[i]);
- }
- }
- kfree(mdevs);
- }
-
- for ( i=0 ; i<15 ; i++ ) {
- if ( mins[i] != NULL ) {
- remove_midi_in_endpoint( mins[i] );
- }
- if ( mouts[i] != NULL ) {
- remove_midi_out_endpoint( mouts[i] );
- }
- }
-
- return -ENOMEM;
-}
-
-/* ------------------------------------------------------------------------- */
-
-/** Attempt to scan YAMAHA's device descriptor and detect correct values of
- * them.
- * Return 0 on succes, negative on failure.
- * Called by usb_midi_probe();
- **/
-
-static int detect_yamaha_device( struct usb_device *d,
- struct usb_interface *iface, unsigned int ifnum,
- struct usb_midi_state *s)
-{
- struct usb_host_interface *interface;
- struct usb_midi_device *u;
- unsigned char *buffer;
- int bufSize;
- int i;
- int alts=-1;
- int ret;
-
- if (le16_to_cpu(d->descriptor.idVendor) != USB_VENDOR_ID_YAMAHA) {
- return -EINVAL;
- }
-
- for ( i=0 ; i < iface->num_altsetting; i++ ) {
- interface = iface->altsetting + i;
-
- if ( interface->desc.bInterfaceClass != 255 ||
- interface->desc.bInterfaceSubClass != 0 )
- continue;
- alts = interface->desc.bAlternateSetting;
- }
- if ( alts == -1 ) {
- return -EINVAL;
- }
-
- printk(KERN_INFO "usb-midi: Found YAMAHA USB-MIDI device on dev %04x:%04x, iface %d\n",
- le16_to_cpu(d->descriptor.idVendor),
- le16_to_cpu(d->descriptor.idProduct), ifnum);
-
- i = d->actconfig - d->config;
- buffer = d->rawdescriptors[i];
- bufSize = le16_to_cpu(d->actconfig->desc.wTotalLength);
-
- u = parse_descriptor( d, buffer, bufSize, ifnum, alts, 1);
- if ( u == NULL ) {
- return -EINVAL;
- }
-
- ret = alloc_usb_midi_device( d, s, u );
-
- kfree(u);
-
- return ret;
-}
-
-
-/** Scan table of known devices which are only partially compliant with
- * the MIDIStreaming specification.
- * Called by usb_midi_probe();
- *
- **/
-
-static int detect_vendor_specific_device( struct usb_device *d, unsigned int ifnum, struct usb_midi_state *s )
-{
- struct usb_midi_device *u;
- int i;
- int ret = -ENXIO;
-
- for ( i=0; i<VENDOR_SPECIFIC_USB_MIDI_DEVICES ; i++ ) {
- u=&(usb_midi_devices[i]);
-
- if ( le16_to_cpu(d->descriptor.idVendor) != u->idVendor ||
- le16_to_cpu(d->descriptor.idProduct) != u->idProduct ||
- ifnum != u->interface )
- continue;
-
- ret = alloc_usb_midi_device( d, s, u );
- break;
- }
-
- return ret;
-}
-
-
-/** Attempt to match any config of an interface to a MIDISTREAMING interface.
- * Returns 0 on success, negative on failure.
- * Called by usb_midi_probe();
- **/
-static int detect_midi_subclass(struct usb_device *d,
- struct usb_interface *iface, unsigned int ifnum,
- struct usb_midi_state *s)
-{
- struct usb_host_interface *interface;
- struct usb_midi_device *u;
- unsigned char *buffer;
- int bufSize;
- int i;
- int alts=-1;
- int ret;
-
- for ( i=0 ; i < iface->num_altsetting; i++ ) {
- interface = iface->altsetting + i;
-
- if ( interface->desc.bInterfaceClass != USB_CLASS_AUDIO ||
- interface->desc.bInterfaceSubClass != USB_SUBCLASS_MIDISTREAMING )
- continue;
- alts = interface->desc.bAlternateSetting;
- }
- if ( alts == -1 ) {
- return -EINVAL;
- }
-
- printk(KERN_INFO "usb-midi: Found MIDISTREAMING on dev %04x:%04x, iface %d\n",
- le16_to_cpu(d->descriptor.idVendor),
- le16_to_cpu(d->descriptor.idProduct), ifnum);
-
-
- /* From USB Spec v2.0, Section 9.5.
- If the class or vendor specific descriptors use the same format
- as standard descriptors (e.g., start with a length byte and
- followed by a type byte), they must be returned interleaved with
- standard descriptors in the configuration information returned by
- a GetDescriptor(Configuration) request. In this case, the class
- or vendor-specific descriptors must follow a related standard
- descriptor they modify or extend.
- */
-
- i = d->actconfig - d->config;
- buffer = d->rawdescriptors[i];
- bufSize = le16_to_cpu(d->actconfig->desc.wTotalLength);
-
- u = parse_descriptor( d, buffer, bufSize, ifnum, alts, 0);
- if ( u == NULL ) {
- return -EINVAL;
- }
-
- ret = alloc_usb_midi_device( d, s, u );
-
- kfree(u);
-
- return ret;
-}
-
-
-/** When user has requested a specific device, match it exactly.
- *
- * Uses uvendor, uproduct, uinterface, ualt, umin, umout and ucable.
- * Called by usb_midi_probe();
- *
- **/
-static int detect_by_hand(struct usb_device *d, unsigned int ifnum, struct usb_midi_state *s)
-{
- struct usb_midi_device u;
-
- if ( le16_to_cpu(d->descriptor.idVendor) != uvendor ||
- le16_to_cpu(d->descriptor.idProduct) != uproduct ||
- ifnum != uinterface ) {
- return -EINVAL;
- }
-
- if ( ualt < 0 )
- ualt = -1;
-
- if ( umin < 0 || umin > 15 )
- umin = 0x01 | USB_DIR_IN;
- if ( umout < 0 || umout > 15 )
- umout = 0x01;
- if ( ucable < 0 || ucable > 15 )
- ucable = 0;
-
- u.deviceName = NULL; /* A flag for alloc_usb_midi_device to get device
- name from device. */
- u.idVendor = uvendor;
- u.idProduct = uproduct;
- u.interface = uinterface;
- u.altSetting = ualt;
-
- u.in[0].endpoint = umin;
- u.in[0].cableId = (1<<ucable);
-
- u.out[0].endpoint = umout;
- u.out[0].cableId = (1<<ucable);
-
- return alloc_usb_midi_device( d, s, &u );
-}
-
-
-
-/* ------------------------------------------------------------------------- */
-
-static int usb_midi_probe(struct usb_interface *intf,
- const struct usb_device_id *id)
-{
- struct usb_midi_state *s;
- struct usb_device *dev = interface_to_usbdev(intf);
- int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
-
- s = (struct usb_midi_state *)kmalloc(sizeof(struct usb_midi_state), GFP_KERNEL);
- if ( !s )
- return -ENOMEM;
-
- memset( s, 0, sizeof(struct usb_midi_state) );
- INIT_LIST_HEAD(&s->midiDevList);
- INIT_LIST_HEAD(&s->inEndpointList);
- INIT_LIST_HEAD(&s->outEndpointList);
- s->usbdev = dev;
- s->count = 0;
- spin_lock_init(&s->lock);
-
- if (
- detect_by_hand( dev, ifnum, s ) &&
- detect_midi_subclass( dev, intf, ifnum, s ) &&
- detect_vendor_specific_device( dev, ifnum, s ) &&
- detect_yamaha_device( dev, intf, ifnum, s) ) {
- kfree(s);
- return -EIO;
- }
-
- down(&open_sem);
- list_add_tail(&s->mididev, &mididevs);
- up(&open_sem);
-
- usb_set_intfdata (intf, s);
- return 0;
-}
-
-
-static void usb_midi_disconnect(struct usb_interface *intf)
-{
- struct usb_midi_state *s = usb_get_intfdata (intf);
- struct usb_mididev *m;
-
- if ( !s )
- return;
-
- if ( s == (struct usb_midi_state *)-1 ) {
- return;
- }
- if ( !s->usbdev ) {
- return;
- }
- down(&open_sem);
- list_del(&s->mididev);
- INIT_LIST_HEAD(&s->mididev);
- s->usbdev = NULL;
- usb_set_intfdata (intf, NULL);
-
- list_for_each_entry(m, &s->midiDevList, list) {
- wake_up(&(m->min.ep->wait));
- wake_up(&(m->mout.ep->wait));
- if ( m->dev_midi >= 0 ) {
- unregister_sound_midi(m->dev_midi);
- }
- m->dev_midi = -1;
- }
- release_midi_device(s);
- wake_up(&open_wait);
-}
-
-/* we want to look at all devices by hand */
-static struct usb_device_id id_table[] = {
- {.driver_info = 42},
- {}
-};
-
-static struct usb_driver usb_midi_driver = {
- .name = "midi",
- .probe = usb_midi_probe,
- .disconnect = usb_midi_disconnect,
- .id_table = id_table,
-};
-
-/* ------------------------------------------------------------------------- */
-
-static int __init usb_midi_init(void)
-{
- return usb_register(&usb_midi_driver);
-}
-
-static void __exit usb_midi_exit(void)
-{
- usb_deregister(&usb_midi_driver);
-}
-
-module_init(usb_midi_init) ;
-module_exit(usb_midi_exit) ;
-
-#ifdef HAVE_ALSA_SUPPORT
-#define SNDRV_MAIN_OBJECT_FILE
-#include "../../include/driver.h"
-#include "../../include/control.h"
-#include "../../include/info.h"
-#include "../../include/cs46xx.h"
-
-/* ------------------------------------------------------------------------- */
-
-static int snd_usbmidi_input_close(snd_rawmidi_substream_t * substream)
-{
- return 0;
-}
-
-static int snd_usbmidi_input_open(snd_rawmidi_substream_t * substream )
-{
- return 0;
-}
-
-static void snd_usbmidi_input_trigger(snd_rawmidi_substream_t * substream, int up)
-{
- return 0;
-}
-
-
-/* ------------------------------------------------------------------------- */
-
-static int snd_usbmidi_output_close(snd_rawmidi_substream_t * substream)
-{
- return 0;
-}
-
-static int snd_usbmidi_output_open(snd_rawmidi_substream_t * substream)
-{
- return 0;
-}
-
-static void snd_usb_midi_output_trigger(snd_rawmidi_substream_t * substream,
- int up)
-{
- return 0;
-}
-
-/* ------------------------------------------------------------------------- */
-
-static snd_rawmidi_ops_t snd_usbmidi_output =
-{
- .open = snd_usbmidi_output_open,
- .close = snd_usbmidi_output_close,
- .trigger = snd_usbmidi_output_trigger,
-};
-static snd_rawmidi_ops_t snd_usbmidi_input =
-{
- .open = snd_usbmidi_input_open,
- .close = snd_usbmidi_input_close,
- .trigger = snd_usbmidi_input_trigger,
-};
-
-int snd_usbmidi_midi(cs46xx_t *chip, int device, snd_rawmidi_t **rrawmidi)
-{
- snd_rawmidi_t *rmidi;
- int err;
-
- if (rrawmidi)
- *rrawmidi = NULL;
- if ((err = snd_rawmidi_new(chip->card, "USB-MIDI", device, 1, 1, &rmidi)) < 0)
- return err;
- strcpy(rmidi->name, "USB-MIDI");
-
- snd_rawmidi_set_ops( rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_usbmidi_output );
- snd_rawmidi_set_ops( rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_usbmidi_input );
-
- rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
-
- rmidi->private_data = chip;
- chip->rmidi = rmidi;
- if (rrawmidi)
- *rrawmidi = NULL;
-
- return 0;
-}
-
-int snd_usbmidi_create( snd_card_t * card,
- struct pci_dev * pci,
- usbmidi_t ** rchip )
-{
- usbmidi_t *chip;
- int err, idx;
- snd_region_t *region;
- static snd_device_opt_t ops = {
- .dev_free = snd_usbmidi_dev_free,
- };
-
- *rchip = NULL;
- chip = snd_magic_kcalloc( usbmidi_t, 0, GFP_KERNEL );
- if ( chip == NULL )
- return -ENOMEM;
-}
-
-EXPORT_SYMBOL(snd_usbmidi_create);
-EXPORT_SYMBOL(snd_usbmidi_midi);
-#endif /* HAVE_ALSA_SUPPORT */
-
projects / linux-2.6 / commitdiff