diff options
Diffstat (limited to 'drivers/usb/class/audio.c')
| -rw-r--r-- | drivers/usb/class/audio.c | 3882 |
1 files changed, 3882 insertions, 0 deletions
diff --git a/drivers/usb/class/audio.c b/drivers/usb/class/audio.c new file mode 100644 index 00000000000..f432b7d5b23 --- /dev/null +++ b/drivers/usb/class/audio.c @@ -0,0 +1,3882 @@ +/*****************************************************************************/ + +/* + * audio.c -- USB Audio Class driver + * + * Copyright (C) 1999, 2000, 2001, 2003, 2004 + * Alan Cox (alan@lxorguk.ukuu.org.uk) + * Thomas Sailer (sailer@ife.ee.ethz.ch) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Debugging: + * Use the 'lsusb' utility to dump the descriptors. + * + * 1999-09-07: Alan Cox + * Parsing Audio descriptor patch + * 1999-09-08: Thomas Sailer + * Added OSS compatible data io functions; both parts of the + * driver remain to be glued together + * 1999-09-10: Thomas Sailer + * Beautified the driver. Added sample format conversions. + * Still not properly glued with the parsing code. + * The parsing code seems to have its problems btw, + * Since it parses all available configs but doesn't + * store which iface/altsetting belongs to which config. + * 1999-09-20: Thomas Sailer + * Threw out Alan's parsing code and implemented my own one. + * You cannot reasonnably linearly parse audio descriptors, + * especially the AudioClass descriptors have to be considered + * pointer lists. Mixer parsing untested, due to lack of device. + * First stab at synch pipe implementation, the Dallas USB DAC + * wants to use an Asynch out pipe. usb_audio_state now basically + * only contains lists of mixer and wave devices. We can therefore + * now have multiple mixer/wave devices per USB device. + * 1999-10-28: Thomas Sailer + * Converted to URB API. Fixed a taskstate/wakeup semantics mistake + * that made the driver consume all available CPU cycles. + * Now runs stable on UHCI-Acher/Fliegl/Sailer. + * 1999-10-31: Thomas Sailer + * Audio can now be unloaded if it is not in use by any mixer + * or dsp client (formerly you had to disconnect the audio devices + * from the USB port) + * Finally, about three months after ordering, my "Maxxtro SPK222" + * speakers arrived, isn't disdata a great mail order company 8-) + * Parse class specific endpoint descriptor of the audiostreaming + * interfaces and take the endpoint attributes from there. + * Unbelievably, the Philips USB DAC has a sampling rate range + * of over a decade, yet does not support the sampling rate control! + * No wonder it sounds so bad, has very audible sampling rate + * conversion distortion. Don't try to listen to it using + * decent headphones! + * "Let's make things better" -> but please Philips start with your + * own stuff!!!! + * 1999-11-02: Thomas Sailer + * It takes the Philips boxes several seconds to acquire synchronisation + * that means they won't play short sounds. Should probably maintain + * the ISO datastream even if there's nothing to play. + * Fix counting the total_bytes counter, RealPlayer G2 depends on it. + * 1999-12-20: Thomas Sailer + * Fix bad bug in conversion to per interface probing. + * disconnect was called multiple times for the audio device, + * leading to a premature freeing of the audio structures + * 2000-05-13: Thomas Sailer + * I don't remember who changed the find_format routine, + * but the change was completely broken for the Dallas + * chip. Anyway taking sampling rate into account in find_format + * is bad and should not be done unless there are devices with + * completely broken audio descriptors. Unless someone shows + * me such a descriptor, I will not allow find_format to + * take the sampling rate into account. + * Also, the former find_format made: + * - mpg123 play mono instead of stereo + * - sox completely fail for wav's with sample rates < 44.1kHz + * for the Dallas chip. + * Also fix a rather long standing problem with applications that + * use "small" writes producing no sound at all. + * 2000-05-15: Thomas Sailer + * My fears came true, the Philips camera indeed has pretty stupid + * audio descriptors. + * 2000-05-17: Thomas Sailer + * Nemsoft spotted my stupid last minute change, thanks + * 2000-05-19: Thomas Sailer + * Fixed FEATURE_UNIT thinkos found thanks to the KC Technology + * Xtend device. Basically the driver treated FEATURE_UNIT's sourced + * by mono terminals as stereo. + * 2000-05-20: Thomas Sailer + * SELECTOR support (and thus selecting record channels from the mixer). + * Somewhat peculiar due to OSS interface limitations. Only works + * for channels where a "slider" is already in front of it (i.e. + * a MIXER unit or a FEATURE unit with volume capability). + * 2000-11-26: Thomas Sailer + * Workaround for Dallas DS4201. The DS4201 uses PCM8 as format tag for + * its 8 bit modes, but expects signed data (and should therefore have used PCM). + * 2001-03-10: Thomas Sailer + * provide abs function, prevent picking up a bogus kernel macro + * for abs. Bug report by Andrew Morton <andrewm@uow.edu.au> + * 2001-06-16: Bryce Nesbitt <bryce@obviously.com> + * Fix SNDCTL_DSP_STEREO API violation + * 2003-04-08: Oliver Neukum (oliver@neukum.name): + * Setting a configuration is done by usbcore and must not be overridden + * 2004-02-27: Workaround for broken synch descriptors + * 2004-03-07: Alan Stern <stern@rowland.harvard.edu> + * Add usb_ifnum_to_if() and usb_altnum_to_altsetting() support. + * Use the in-memory descriptors instead of reading them from the device. + * + */ + +/* + * Strategy: + * + * Alan Cox and Thomas Sailer are starting to dig at opposite ends and + * are hoping to meet in the middle, just like tunnel diggers :) + * Alan tackles the descriptor parsing, Thomas the actual data IO and the + * OSS compatible interface. + * + * Data IO implementation issues + * + * A mmap'able ring buffer per direction is implemented, because + * almost every OSS app expects it. It is however impractical to + * transmit/receive USB data directly into and out of the ring buffer, + * due to alignment and synchronisation issues. Instead, the ring buffer + * feeds a constant time delay line that handles the USB issues. + * + * Now we first try to find an alternate setting that exactly matches + * the sample format requested by the user. If we find one, we do not + * need to perform any sample rate conversions. If there is no matching + * altsetting, we choose the closest one and perform sample format + * conversions. We never do sample rate conversion; these are too + * expensive to be performed in the kernel. + * + * Current status: no known HCD-specific issues. + * + * Generally: Due to the brokenness of the Audio Class spec + * it seems generally impossible to write a generic Audio Class driver, + * so a reasonable driver should implement the features that are actually + * used. + * + * Parsing implementation issues + * + * One cannot reasonably parse the AudioClass descriptors linearly. + * Therefore the current implementation features routines to look + * for a specific descriptor in the descriptor list. + * + * How does the parsing work? First, all interfaces are searched + * for an AudioControl class interface. If found, the config descriptor + * that belongs to the current configuration is searched and + * the HEADER descriptor is found. It contains a list of + * all AudioStreaming and MIDIStreaming devices. This list is then walked, + * and all AudioStreaming interfaces are classified into input and output + * interfaces (according to the endpoint0 direction in altsetting1) (MIDIStreaming + * is currently not supported). The input & output list is then used + * to group inputs and outputs together and issued pairwise to the + * AudioStreaming class parser. Finally, all OUTPUT_TERMINAL descriptors + * are walked and issued to the mixer construction routine. + * + * The AudioStreaming parser simply enumerates all altsettings belonging + * to the specified interface. It looks for AS_GENERAL and FORMAT_TYPE + * class specific descriptors to extract the sample format/sample rate + * data. Only sample format types PCM and PCM8 are supported right now, and + * only FORMAT_TYPE_I is handled. The isochronous data endpoint needs to + * be the first endpoint of the interface, and the optional synchronisation + * isochronous endpoint the second one. + * + * Mixer construction works as follows: The various TERMINAL and UNIT + * descriptors span a tree from the root (OUTPUT_TERMINAL) through the + * intermediate nodes (UNITs) to the leaves (INPUT_TERMINAL). We walk + * that tree in a depth first manner. FEATURE_UNITs may contribute volume, + * bass and treble sliders to the mixer, MIXER_UNITs volume sliders. + * The terminal type encoded in the INPUT_TERMINALs feeds a heuristic + * to determine "meaningful" OSS slider numbers, however we will see + * how well this works in practice. Other features are not used at the + * moment, they seem less often used. Also, it seems difficult at least + * to construct recording source switches from SELECTOR_UNITs, but + * since there are not many USB ADC's available, we leave that for later. + */ + +/*****************************************************************************/ + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/sched.h> +#include <linux/smp_lock.h> +#include <linux/module.h> +#include <linux/sound.h> +#include <linux/soundcard.h> +#include <linux/list.h> +#include <linux/vmalloc.h> +#include <linux/init.h> +#include <linux/poll.h> +#include <linux/bitops.h> +#include <asm/uaccess.h> +#include <asm/io.h> +#include <linux/usb.h> + +#include "audio.h" + +/* + * Version Information + */ +#define DRIVER_VERSION "v1.0.0" +#define DRIVER_AUTHOR "Alan Cox <alan@lxorguk.ukuu.org.uk>, Thomas Sailer (sailer@ife.ee.ethz.ch)" +#define DRIVER_DESC "USB Audio Class driver" + +#define AUDIO_DEBUG 1 + +#define SND_DEV_DSP16 5 + +#define dprintk(x) + +/* --------------------------------------------------------------------- */ + +/* + * Linked list of all audio devices... + */ +static struct list_head audiodevs = LIST_HEAD_INIT(audiodevs); +static DECLARE_MUTEX(open_sem); + +/* + * wait queue for processes wanting to open an USB audio device + */ +static DECLARE_WAIT_QUEUE_HEAD(open_wait); + + +#define MAXFORMATS MAX_ALT +#define DMABUFSHIFT 17 /* 128k worth of DMA buffer */ +#define NRSGBUF (1U<<(DMABUFSHIFT-PAGE_SHIFT)) + +/* + * This influences: + * - Latency + * - Interrupt rate + * - Synchronisation behaviour + * Don't touch this if you don't understand all of the above. + */ +#define DESCFRAMES 5 +#define SYNCFRAMES DESCFRAMES + +#define MIXFLG_STEREOIN 1 +#define MIXFLG_STEREOOUT 2 + +struct mixerchannel { + __u16 value; + __u16 osschannel; /* number of the OSS channel */ + __s16 minval, maxval; + __u16 slctunitid; + __u8 unitid; + __u8 selector; + __u8 chnum; + __u8 flags; +}; + +struct audioformat { + unsigned int format; + unsigned int sratelo; + unsigned int sratehi; + unsigned char altsetting; + unsigned char attributes; +}; + +struct dmabuf { + /* buffer data format */ + unsigned int format; + unsigned int srate; + /* physical buffer */ + unsigned char *sgbuf[NRSGBUF]; + unsigned bufsize; + unsigned numfrag; + unsigned fragshift; + unsigned wrptr, rdptr; + unsigned total_bytes; + int count; + unsigned error; /* over/underrun */ + wait_queue_head_t wait; + /* redundant, but makes calculations easier */ + unsigned fragsize; + unsigned dmasize; + /* OSS stuff */ + unsigned mapped:1; + unsigned ready:1; + unsigned ossfragshift; + int ossmaxfrags; + unsigned subdivision; +}; + +struct usb_audio_state; + +#define FLG_URB0RUNNING 1 +#define FLG_URB1RUNNING 2 +#define FLG_SYNC0RUNNING 4 +#define FLG_SYNC1RUNNING 8 +#define FLG_RUNNING 16 +#define FLG_CONNECTED 32 + +struct my_data_urb { + struct urb *urb; +}; + +struct my_sync_urb { + struct urb *urb; +}; + + +struct usb_audiodev { + struct list_head list; + struct usb_audio_state *state; + + /* soundcore stuff */ + int dev_audio; + + /* wave stuff */ + mode_t open_mode; + spinlock_t lock; /* DMA buffer access spinlock */ + + struct usbin { + int interface; /* Interface number, -1 means not used */ + unsigned int format; /* USB data format */ + unsigned int datapipe; /* the data input pipe */ + unsigned int syncpipe; /* the synchronisation pipe - 0 for anything but adaptive IN mode */ + unsigned int syncinterval; /* P for adaptive IN mode, 0 otherwise */ + unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */ + unsigned int freqmax; /* maximum sampling rate, used for buffer management */ + unsigned int phase; /* phase accumulator */ + unsigned int flags; /* see FLG_ defines */ + + struct my_data_urb durb[2]; /* ISO descriptors for the data endpoint */ + struct my_sync_urb surb[2]; /* ISO sync pipe descriptor if needed */ + + struct dmabuf dma; + } usbin; + + struct usbout { + int interface; /* Interface number, -1 means not used */ + unsigned int format; /* USB data format */ + unsigned int datapipe; /* the data input pipe */ + unsigned int syncpipe; /* the synchronisation pipe - 0 for anything but asynchronous OUT mode */ + unsigned int syncinterval; /* P for asynchronous OUT mode, 0 otherwise */ + unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */ + unsigned int freqm; /* momentary sampling rate in USB format, i.e. fs/1000 in Q10.14 */ + unsigned int freqmax; /* maximum sampling rate, used for buffer management */ + unsigned int phase; /* phase accumulator */ + unsigned int flags; /* see FLG_ defines */ + + struct my_data_urb durb[2]; /* ISO descriptors for the data endpoint */ + struct my_sync_urb surb[2]; /* ISO sync pipe descriptor if needed */ + + struct dmabuf dma; + } usbout; + + + unsigned int numfmtin, numfmtout; + struct audioformat fmtin[MAXFORMATS]; + struct audioformat fmtout[MAXFORMATS]; +}; + +struct usb_mixerdev { + struct list_head list; + struct usb_audio_state *state; + + /* soundcore stuff */ + int dev_mixer; + + unsigned char iface; /* interface number of the AudioControl interface */ + + /* USB format descriptions */ + unsigned int numch, modcnt; + + /* mixch is last and gets allocated dynamically */ + struct mixerchannel ch[0]; +}; + +struct usb_audio_state { + struct list_head audiodev; + + /* USB device */ + struct usb_device *usbdev; + + struct list_head audiolist; + struct list_head mixerlist; + + unsigned count; /* usage counter; NOTE: the usb stack is also considered a user */ +}; + +/* private audio format extensions */ +#define AFMT_STEREO 0x80000000 +#define AFMT_ISSTEREO(x) ((x) & AFMT_STEREO) +#define AFMT_IS16BIT(x) ((x) & (AFMT_S16_LE|AFMT_S16_BE|AFMT_U16_LE|AFMT_U16_BE)) +#define AFMT_ISUNSIGNED(x) ((x) & (AFMT_U8|AFMT_U16_LE|AFMT_U16_BE)) +#define AFMT_BYTESSHIFT(x) ((AFMT_ISSTEREO(x) ? 1 : 0) + (AFMT_IS16BIT(x) ? 1 : 0)) +#define AFMT_BYTES(x) (1<<AFMT_BYTESSHFIT(x)) + +/* --------------------------------------------------------------------- */ + +static inline unsigned ld2(unsigned int x) +{ + unsigned r = 0; + + if (x >= 0x10000) { + x >>= 16; + r += 16; + } + if (x >= 0x100) { + x >>= 8; + r += 8; + } + if (x >= 0x10) { + x >>= 4; + r += 4; + } + if (x >= 4) { + x >>= 2; + r += 2; + } + if (x >= 2) + r++; + return r; +} + +/* --------------------------------------------------------------------- */ + +/* + * OSS compatible ring buffer management. The ring buffer may be mmap'ed into + * an application address space. + * + * I first used the rvmalloc stuff copied from bttv. Alan Cox did not like it, so + * we now use an array of pointers to a single page each. This saves us the + * kernel page table manipulations, but we have to do a page table alike mechanism + * (though only one indirection) in software. + */ + +static void dmabuf_release(struct dmabuf *db) +{ + unsigned int nr; + void *p; + + for(nr = 0; nr < NRSGBUF; nr++) { + if (!(p = db->sgbuf[nr])) + continue; + ClearPageReserved(virt_to_page(p)); + free_page((unsigned long)p); + db->sgbuf[nr] = NULL; + } + db->mapped = db->ready = 0; +} + +static int dmabuf_init(struct dmabuf *db) +{ + unsigned int nr, bytepersec, bufs; + void *p; + + /* initialize some fields */ + db->rdptr = db->wrptr = db->total_bytes = db->count = db->error = 0; + /* calculate required buffer size */ + bytepersec = db->srate << AFMT_BYTESSHIFT(db->format); + bufs = 1U << DMABUFSHIFT; + if (db->ossfragshift) { + if ((1000 << db->ossfragshift) < bytepersec) + db->fragshift = ld2(bytepersec/1000); + else + db->fragshift = db->ossfragshift; + } else { + db->fragshift = ld2(bytepersec/100/(db->subdivision ? db->subdivision : 1)); + if (db->fragshift < 3) + db->fragshift = 3; + } + db->numfrag = bufs >> db->fragshift; + while (db->numfrag < 4 && db->fragshift > 3) { + db->fragshift--; + db->numfrag = bufs >> db->fragshift; + } + db->fragsize = 1 << db->fragshift; + if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag) + db->numfrag = db->ossmaxfrags; + db->dmasize = db->numfrag << db->fragshift; + for(nr = 0; nr < NRSGBUF; nr++) { + if (!db->sgbuf[nr]) { + p = (void *)get_zeroed_page(GFP_KERNEL); + if (!p) + return -ENOMEM; + db->sgbuf[nr] = p; + SetPageReserved(virt_to_page(p)); + } + memset(db->sgbuf[nr], AFMT_ISUNSIGNED(db->format) ? 0x80 : 0, PAGE_SIZE); + if ((nr << PAGE_SHIFT) >= db->dmasize) + break; + } + db->bufsize = nr << PAGE_SHIFT; + db->ready = 1; + dprintk((KERN_DEBUG "usbaudio: dmabuf_init bytepersec %d bufs %d ossfragshift %d ossmaxfrags %d " + "fragshift %d fragsize %d numfrag %d dmasize %d bufsize %d fmt 0x%x srate %d\n", + bytepersec, bufs, db->ossfragshift, db->ossmaxfrags, db->fragshift, db->fragsize, + db->numfrag, db->dmasize, db->bufsize, db->format, db->srate)); + return 0; +} + +static int dmabuf_mmap(struct vm_area_struct *vma, struct dmabuf *db, unsigned long start, unsigned long size, pgprot_t prot) +{ + unsigned int nr; + + if (!db->ready || db->mapped || (start | size) & (PAGE_SIZE-1) || size > db->bufsize) + return -EINVAL; + size >>= PAGE_SHIFT; + for(nr = 0; nr < size; nr++) + if (!db->sgbuf[nr]) + return -EINVAL; + db->mapped = 1; + for(nr = 0; nr < size; nr++) { + unsigned long pfn; + + pfn = virt_to_phys(db->sgbuf[nr]) >> PAGE_SHIFT; + if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, prot)) + return -EAGAIN; + start += PAGE_SIZE; + } + return 0; +} + +static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int size) +{ + unsigned int pgrem, rem; + + db->total_bytes += size; + for (;;) { + if (size <= 0) + return; + pgrem = ((~db->wrptr) & (PAGE_SIZE-1)) + 1; + if (pgrem > size) + pgrem = size; + rem = db->dmasize - db->wrptr; + if (pgrem > rem) + pgrem = rem; + memcpy((db->sgbuf[db->wrptr >> PAGE_SHIFT]) + (db->wrptr & (PAGE_SIZE-1)), buffer, pgrem); + size -= pgrem; + buffer += pgrem; + db->wrptr += pgrem; + if (db->wrptr >= db->dmasize) + db->wrptr = 0; + } +} + +static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size) +{ + unsigned int pgrem, rem; + + db->total_bytes += size; + for (;;) { + if (size <= 0) + return; + pgrem = ((~db->rdptr) & (PAGE_SIZE-1)) + 1; + if (pgrem > size) + pgrem = size; + rem = db->dmasize - db->rdptr; + if (pgrem > rem) + pgrem = rem; + memcpy(buffer, (db->sgbuf[db->rdptr >> PAGE_SHIFT]) + (db->rdptr & (PAGE_SIZE-1)), pgrem); + size -= pgrem; + buffer += pgrem; + db->rdptr += pgrem; + if (db->rdptr >= db->dmasize) + db->rdptr = 0; + } +} + +static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void __user *buffer, unsigned int size) +{ + unsigned int pgrem, rem; + + if (!db->ready || db->mapped) + return -EINVAL; + for (;;) { + if (size <= 0) + return 0; + pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1; + if (pgrem > size) + pgrem = size; + rem = db->dmasize - ptr; + if (pgrem > rem) + pgrem = rem; + if (copy_from_user((db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), buffer, pgrem)) + return -EFAULT; + size -= pgrem; + buffer += pgrem; + ptr += pgrem; + if (ptr >= db->dmasize) + ptr = 0; + } +} + +static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void __user *buffer, unsigned int size) +{ + unsigned int pgrem, rem; + + if (!db->ready || db->mapped) + return -EINVAL; + for (;;) { + if (size <= 0) + return 0; + pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1; + if (pgrem > size) + pgrem = size; + rem = db->dmasize - ptr; + if (pgrem > rem) + pgrem = rem; + if (copy_to_user(buffer, (db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), pgrem)) + return -EFAULT; + size -= pgrem; + buffer += pgrem; + ptr += pgrem; + if (ptr >= db->dmasize) + ptr = 0; + } +} + +/* --------------------------------------------------------------------- */ +/* + * USB I/O code. We do sample format conversion if necessary + */ + +static void usbin_stop(struct usb_audiodev *as) +{ + struct usbin *u = &as->usbin; + unsigned long flags; + unsigned int i, notkilled = 1; + + spin_lock_irqsave(&as->lock, flags); + u->flags &= ~FLG_RUNNING; + i = u->flags; + spin_unlock_irqrestore(&as->lock, flags); + while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) { + set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); + schedule_timeout(1); + spin_lock_irqsave(&as->lock, flags); + i = u->flags; + spin_unlock_irqrestore(&as->lock, flags); + if (notkilled && signal_pending(current)) { + if (i & FLG_URB0RUNNING) + usb_kill_urb(u->durb[0].urb); + if (i & FLG_URB1RUNNING) + usb_kill_urb(u->durb[1].urb); + if (i & FLG_SYNC0RUNNING) + usb_kill_urb(u->surb[0].urb); + if (i & FLG_SYNC1RUNNING) + usb_kill_urb(u->surb[1].urb); + notkilled = 0; + } + } + set_current_state(TASK_RUNNING); + if (u->durb[0].urb->transfer_buffer) + kfree(u->durb[0].urb->transfer_buffer); + if (u->durb[1].urb->transfer_buffer) + kfree(u->durb[1].urb->transfer_buffer); + if (u->surb[0].urb->transfer_buffer) + kfree(u->surb[0].urb->transfer_buffer); + if (u->surb[1].urb->transfer_buffer) + kfree(u->surb[1].urb->transfer_buffer); + u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer = + u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL; +} + +static inline void usbin_release(struct usb_audiodev *as) +{ + usbin_stop(as); +} + +static void usbin_disc(struct usb_audiodev *as) +{ + struct usbin *u = &as->usbin; + + unsigned long flags; + + spin_lock_irqsave(&as->lock, flags); + u->flags &= ~(FLG_RUNNING | FLG_CONNECTED); + spin_unlock_irqrestore(&as->lock, flags); + usbin_stop(as); +} + +static void conversion(const void *ibuf, unsigned int ifmt, void *obuf, unsigned int ofmt, void *tmp, unsigned int scnt) +{ + unsigned int cnt, i; + __s16 *sp, *sp2, s; + unsigned char *bp; + + cnt = scnt; + if (AFMT_ISSTEREO(ifmt)) + cnt <<= 1; + sp = ((__s16 *)tmp) + cnt; + switch (ifmt & ~AFMT_STEREO) { + case AFMT_U8: + for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) { + bp--; + sp--; + *sp = (*bp ^ 0x80) << 8; + } + break; + + case AFMT_S8: + for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) { + bp--; + sp--; + *sp = *bp << 8; + } + break; + + case AFMT_U16_LE: + for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) { + bp -= 2; + sp--; + *sp = (bp[0] | (bp[1] << 8)) ^ 0x8000; + } + break; + + case AFMT_U16_BE: + for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) { + bp -= 2; + sp--; + *sp = (bp[1] | (bp[0] << 8)) ^ 0x8000; + } + break; + + case AFMT_S16_LE: + for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) { + bp -= 2; + sp--; + *sp = bp[0] | (bp[1] << 8); + } + break; + + case AFMT_S16_BE: + for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) { + bp -= 2; + sp--; + *sp = bp[1] | (bp[0] << 8); + } + break; + } + if (!AFMT_ISSTEREO(ifmt) && AFMT_ISSTEREO(ofmt)) { + /* expand from mono to stereo */ + for (sp = ((__s16 *)tmp)+scnt, sp2 = ((__s16 *)tmp)+2*scnt, i = 0; i < scnt; i++) { + sp--; + sp2 -= 2; + sp2[0] = sp2[1] = sp[0]; + } + } + if (AFMT_ISSTEREO(ifmt) && !AFMT_ISSTEREO(ofmt)) { + /* contract from stereo to mono */ + for (sp = sp2 = ((__s16 *)tmp), i = 0; i < scnt; i++, sp++, sp2 += 2) + sp[0] = (sp2[0] + sp2[1]) >> 1; + } + cnt = scnt; + if (AFMT_ISSTEREO(ofmt)) + cnt <<= 1; + sp = ((__s16 *)tmp); + bp = ((unsigned char *)obuf); + switch (ofmt & ~AFMT_STEREO) { + case AFMT_U8: + for (i = 0; i < cnt; i++, sp++, bp++) + *bp = (*sp >> 8) ^ 0x80; + break; + + case AFMT_S8: + for (i = 0; i < cnt; i++, sp++, bp++) + *bp = *sp >> 8; + break; + + case AFMT_U16_LE: + for (i = 0; i < cnt; i++, sp++, bp += 2) { + s = *sp; + bp[0] = s; + bp[1] = (s >> 8) ^ 0x80; + } + break; + + case AFMT_U16_BE: + for (i = 0; i < cnt; i++, sp++, bp += 2) { + s = *sp; + bp[1] = s; + bp[0] = (s >> 8) ^ 0x80; + } + break; + + case AFMT_S16_LE: + for (i = 0; i < cnt; i++, sp++, bp += 2) { + s = *sp; + bp[0] = s; + bp[1] = s >> 8; + } + break; + + case AFMT_S16_BE: + for (i = 0; i < cnt; i++, sp++, bp += 2) { + s = *sp; + bp[1] = s; + bp[0] = s >> 8; + } + break; + } + +} + +static void usbin_convert(struct usbin *u, unsigned char *buffer, unsigned int samples) +{ + union { + __s16 s[64]; + unsigned char b[0]; + } tmp; + unsigned int scnt, maxs, ufmtsh, dfmtsh; + + ufmtsh = AFMT_BYTESSHIFT(u->format); + dfmtsh = AFMT_BYTESSHIFT(u->dma.format); + maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64; + while (samples > 0) { + scnt = samples; + if (scnt > maxs) + scnt = maxs; + conversion(buffer, u->format, tmp.b, u->dma.format, tmp.b, scnt); + dmabuf_copyin(&u->dma, tmp.b, scnt << dfmtsh); + buffer += scnt << ufmtsh; + samples -= scnt; + } +} + +static int usbin_prepare_desc(struct usbin *u, struct urb *urb) +{ + unsigned int i, maxsize, offs; + + maxsize = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format)); + //printk(KERN_DEBUG "usbin_prepare_desc: maxsize %d freq 0x%x format 0x%x\n", maxsize, u->freqn, u->format); + for (i = offs = 0; i < DESCFRAMES; i++, offs += maxsize) { + urb->iso_frame_desc[i].length = maxsize; + urb->iso_frame_desc[i].offset = offs; + } + urb->interval = 1; + return 0; +} + +/* + * return value: 0 if descriptor should be restarted, -1 otherwise + * convert sample format on the fly if necessary + */ +static int usbin_retire_desc(struct usbin *u, struct urb *urb) +{ + unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, dmafree; + unsigned char *cp; + + ufmtsh = AFMT_BYTESSHIFT(u->format); + dfmtsh = AFMT_BYTESSHIFT(u->dma.format); + for (i = 0; i < DESCFRAMES; i++) { + cp = ((unsigned char *)urb->transfer_buffer) + urb->iso_frame_desc[i].offset; + if (urb->iso_frame_desc[i].status) { + dprintk((KERN_DEBUG "usbin_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status)); + continue; + } + scnt = urb->iso_frame_desc[i].actual_length >> ufmtsh; + if (!scnt) + continue; + cnt = scnt << dfmtsh; + if (!u->dma.mapped) { + dmafree = u->dma.dmasize - u->dma.count; + if (cnt > dmafree) { + scnt = dmafree >> dfmtsh; + cnt = scnt << dfmtsh; + err++; + } + } + u->dma.count += cnt; + if (u->format == u->dma.format) { + /* we do not need format conversion */ + dprintk((KERN_DEBUG "usbaudio: no sample format conversion\n")); + dmabuf_copyin(&u->dma, cp, cnt); + } else { + /* we need sampling format conversion */ + dprintk((KERN_DEBUG "usbaudio: sample format conversion %x != %x\n", u->format, u->dma.format)); + usbin_convert(u, cp, scnt); + } + } + if (err) + u->dma.error++; + if (u->dma.count >= (signed)u->dma.fragsize) + wake_up(&u->dma.wait); + return err ? -1 : 0; +} + +static void usbin_completed(struct urb *urb, struct pt_regs *regs) +{ + struct usb_audiodev *as = (struct usb_audiodev *)urb->context; + struct usbin *u = &as->usbin; + unsigned long flags; + unsigned int mask; + int suret = 0; + +#if 0 + printk(KERN_DEBUG "usbin_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags); +#endif + if (urb == u->durb[0].urb) + mask = FLG_URB0RUNNING; + else if (urb == u->durb[1].urb) + mask = FLG_URB1RUNNING; + else { + mask = 0; + printk(KERN_ERR "usbin_completed: panic: unknown URB\n"); + } + urb->dev = as->state->usbdev; + spin_lock_irqsave(&as->lock, flags); + if (!usbin_retire_desc(u, urb) && + u->flags & FLG_RUNNING && + !usbin_prepare_desc(u, urb) && + (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) { + u->flags |= mask; + } else { + u->flags &= ~(mask | FLG_RUNNING); + wake_up(&u->dma.wait); + printk(KERN_DEBUG "usbin_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret); + } + spin_unlock_irqrestore(&as->lock, flags); +} + +/* + * we output sync data + */ +static int usbin_sync_prepare_desc(struct usbin *u, struct urb *urb) +{ + unsigned char *cp = urb->transfer_buffer; + unsigned int i, offs; + + for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3, cp += 3) { + urb->iso_frame_desc[i].length = 3; + urb->iso_frame_desc[i].offset = offs; + cp[0] = u->freqn; + cp[1] = u->freqn >> 8; + cp[2] = u->freqn >> 16; + } + urb->interval = 1; + return 0; +} + +/* + * return value: 0 if descriptor should be restarted, -1 otherwise + */ +static int usbin_sync_retire_desc(struct usbin *u, struct urb *urb) +{ + unsigned int i; + + for (i = 0; i < SYNCFRAMES; i++) + if (urb->iso_frame_desc[0].status) + dprintk((KERN_DEBUG "usbin_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status)); + return 0; +} + +static void usbin_sync_completed(struct urb *urb, struct pt_regs *regs) +{ + struct usb_audiodev *as = (struct usb_audiodev *)urb->context; + struct usbin *u = &as->usbin; + unsigned long flags; + unsigned int mask; + int suret = 0; + +#if 0 + printk(KERN_DEBUG "usbin_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags); +#endif + if (urb == u->surb[0].urb) + mask = FLG_SYNC0RUNNING; + else if (urb == u->surb[1].urb) + mask = FLG_SYNC1RUNNING; + else { + mask = 0; + printk(KERN_ERR "usbin_sync_completed: panic: unknown URB\n"); + } + urb->dev = as->state->usbdev; + spin_lock_irqsave(&as->lock, flags); + if (!usbin_sync_retire_desc(u, urb) && + u->flags & FLG_RUNNING && + !usbin_sync_prepare_desc(u, urb) && + (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) { + u->flags |= mask; + } else { + u->flags &= ~(mask | FLG_RUNNING); + wake_up(&u->dma.wait); + dprintk((KERN_DEBUG "usbin_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret)); + } + spin_unlock_irqrestore(&as->lock, flags); +} + +static int usbin_start(struct usb_audiodev *as) +{ + struct usb_device *dev = as->state->usbdev; + struct usbin *u = &as->usbin; + struct urb *urb; + unsigned long flags; + unsigned int maxsze, bufsz; + +#if 0 + printk(KERN_DEBUG "usbin_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n", + dev->devnum, u->format, u->dma.format, u->dma.srate); +#endif + /* allocate USB storage if not already done */ + spin_lock_irqsave(&as->lock, flags); + if (!(u->flags & FLG_CONNECTED)) { + spin_unlock_irqrestore(&as->lock, flags); + return -EIO; + } + if (!(u->flags & FLG_RUNNING)) { + spin_unlock_irqrestore(&as->lock, flags); + u->freqn = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */ + u->freqmax = u->freqn + (u->freqn >> 2); + u->phase = 0; + maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format)); + bufsz = DESCFRAMES * maxsze; + if (u->durb[0].urb->transfer_buffer) + kfree(u->durb[0].urb->transfer_buffer); + u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL); + u->durb[0].urb->transfer_buffer_length = bufsz; + if (u->durb[1].urb->transfer_buffer) + kfree(u->durb[1].urb->transfer_buffer); + u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL); + u->durb[1].urb->transfer_buffer_length = bufsz; + if (u->syncpipe) { + if (u->surb[0].urb->transfer_buffer) + kfree(u->surb[0].urb->transfer_buffer); + u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL); + u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES; + if (u->surb[1].urb->transfer_buffer) + kfree(u->surb[1].urb->transfer_buffer); + u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL); + u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES; + } + if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer || + (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) { + printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum); + return 0; + } + spin_lock_irqsave(&as->lock, flags); + } + if (u->dma.count >= u->dma.dmasize && !u->dma.mapped) { + spin_unlock_irqrestore(&as->lock, flags); + return 0; + } + u->flags |= FLG_RUNNING; + if (!(u->flags & FLG_URB0RUNNING)) { + urb = u->durb[0].urb; + urb->dev = dev; + urb->pipe = u->datapipe; + urb->transfer_flags = URB_ISO_ASAP; + urb->number_of_packets = DESCFRAMES; + urb->context = as; + urb->complete = usbin_completed; + if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL)) + u->flags |= FLG_URB0RUNNING; + else + u->flags &= ~FLG_RUNNING; + } + if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) { + urb = u->durb[1].urb; + urb->dev = dev; + urb->pipe = u->datapipe; + urb->transfer_flags = URB_ISO_ASAP; + urb->number_of_packets = DESCFRAMES; + urb->context = as; + urb->complete = usbin_completed; + if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL)) + u->flags |= FLG_URB1RUNNING; + else + u->flags &= ~FLG_RUNNING; + } + if (u->syncpipe) { + if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) { + urb = u->surb[0].urb; + urb->dev = dev; + urb->pipe = u->syncpipe; + urb->transfer_flags = URB_ISO_ASAP; + urb->number_of_packets = SYNCFRAMES; + urb->context = as; + urb->complete = usbin_sync_completed; + /* stride: u->syncinterval */ + if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL)) + u->flags |= FLG_SYNC0RUNNING; + else + u->flags &= ~FLG_RUNNING; + } + if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) { + urb = u->surb[1].urb; + urb->dev = dev; + urb->pipe = u->syncpipe; + urb->transfer_flags = URB_ISO_ASAP; + urb->number_of_packets = SYNCFRAMES; + urb->context = as; + urb->complete = usbin_sync_completed; + /* stride: u->syncinterval */ + if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL)) + u->flags |= FLG_SYNC1RUNNING; + else + u->flags &= ~FLG_RUNNING; + } + } + spin_unlock_irqrestore(&as->lock, flags); + return 0; +} + +static void usbout_stop(struct usb_audiodev *as) +{ + struct usbout *u = &as->usbout; + unsigned long flags; + unsigned int i, notkilled = 1; + + spin_lock_irqsave(&as->lock, flags); + u->flags &= ~FLG_RUNNING; + i = u->flags; + spin_unlock_irqrestore(&as->lock, flags); + while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) { + set_current_state(notkilled ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE); + schedule_timeout(1); + spin_lock_irqsave(&as->lock, flags); + i = u->flags; + spin_unlock_irqrestore(&as->lock, flags); + if (notkilled && signal_pending(current)) { + if (i & FLG_URB0RUNNING) + usb_kill_urb(u->durb[0].urb); + if (i & FLG_URB1RUNNING) + usb_kill_urb(u->durb[1].urb); + if (i & FLG_SYNC0RUNNING) + usb_kill_urb(u->surb[0].urb); + if (i & FLG_SYNC1RUNNING) + usb_kill_urb(u->surb[1].urb); + notkilled = 0; + } + } + set_current_state(TASK_RUNNING); + if (u->durb[0].urb->transfer_buffer) + kfree(u->durb[0].urb->transfer_buffer); + if (u->durb[1].urb->transfer_buffer) + kfree(u->durb[1].urb->transfer_buffer); + if (u->surb[0].urb->transfer_buffer) + kfree(u->surb[0].urb->transfer_buffer); + if (u->surb[1].urb->transfer_buffer) + kfree(u->surb[1].urb->transfer_buffer); + u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer = + u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL; +} + +static inline void usbout_release(struct usb_audiodev *as) +{ + usbout_stop(as); +} + +static void usbout_disc(struct usb_audiodev *as) +{ + struct usbout *u = &as->usbout; + unsigned long flags; + + spin_lock_irqsave(&as->lock, flags); + u->flags &= ~(FLG_RUNNING | FLG_CONNECTED); + spin_unlock_irqrestore(&as->lock, flags); + usbout_stop(as); +} + +static void usbout_convert(struct usbout *u, unsigned char *buffer, unsigned int samples) +{ + union { + __s16 s[64]; + unsigned char b[0]; + } tmp; + unsigned int scnt, maxs, ufmtsh, dfmtsh; + + ufmtsh = AFMT_BYTESSHIFT(u->format); + dfmtsh = AFMT_BYTESSHIFT(u->dma.format); + maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64; + while (samples > 0) { + scnt = samples; + if (scnt > maxs) + scnt = maxs; + dmabuf_copyout(&u->dma, tmp.b, scnt << dfmtsh); + conversion(tmp.b, u->dma.format, buffer, u->format, tmp.b, scnt); + buffer += scnt << ufmtsh; + samples -= scnt; + } +} + +static int usbout_prepare_desc(struct usbout *u, struct urb *urb) +{ + unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, offs; + unsigned char *cp = urb->transfer_buffer; + + ufmtsh = AFMT_BYTESSHIFT(u->format); + dfmtsh = AFMT_BYTESSHIFT(u->dma.format); + for (i = offs = 0; i < DESCFRAMES; i++) { + urb->iso_frame_desc[i].offset = offs; + u->phase = (u->phase & 0x3fff) + u->freqm; + scnt = u->phase >> 14; + if (!scnt) { + urb->iso_frame_desc[i].length = 0; + continue; + } + cnt = scnt << dfmtsh; + if (!u->dma.mapped) { + if (cnt > u->dma.count) { + scnt = u->dma.count >> dfmtsh; + cnt = scnt << dfmtsh; + err++; + } + u->dma.count -= cnt; + } else + u->dma.count += cnt; + if (u->format == u->dma.format) { + /* we do not need format conversion */ + dmabuf_copyout(&u->dma, cp, cnt); + } else { + /* we need sampling format conversion */ + usbout_convert(u, cp, scnt); + } + cnt = scnt << ufmtsh; + urb->iso_frame_desc[i].length = cnt; + offs += cnt; + cp += cnt; + } + urb->interval = 1; + if (err) + u->dma.error++; + if (u->dma.mapped) { + if (u->dma.count >= (signed)u->dma.fragsize) + wake_up(&u->dma.wait); + } else { + if ((signed)u->dma.dmasize >= u->dma.count + (signed)u->dma.fragsize) + wake_up(&u->dma.wait); + } + return err ? -1 : 0; +} + +/* + * return value: 0 if descriptor should be restarted, -1 otherwise + */ +static int usbout_retire_desc(struct usbout *u, struct urb *urb) +{ + unsigned int i; + + for (i = 0; i < DESCFRAMES; i++) { + if (urb->iso_frame_desc[i].status) { + dprintk((KERN_DEBUG "usbout_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status)); + continue; + } + } + return 0; +} + +static void usbout_completed(struct urb *urb, struct pt_regs *regs) +{ + struct usb_audiodev *as = (struct usb_audiodev *)urb->context; + struct usbout *u = &as->usbout; + unsigned long flags; + unsigned int mask; + int suret = 0; + +#if 0 + printk(KERN_DEBUG "usbout_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags); +#endif + if (urb == u->durb[0].urb) + mask = FLG_URB0RUNNING; + else if (urb == u->durb[1].urb) + mask = FLG_URB1RUNNING; + else { + mask = 0; + printk(KERN_ERR "usbout_completed: panic: unknown URB\n"); + } + urb->dev = as->state->usbdev; + spin_lock_irqsave(&as->lock, flags); + if (!usbout_retire_desc(u, urb) && + u->flags & FLG_RUNNING && + !usbout_prepare_desc(u, urb) && + (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) { + u->flags |= mask; + } else { + u->flags &= ~(mask | FLG_RUNNING); + wake_up(&u->dma.wait); + dprintk((KERN_DEBUG "usbout_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret)); + } + spin_unlock_irqrestore(&as->lock, flags); +} + +static int usbout_sync_prepare_desc(struct usbout *u, struct urb *urb) +{ + unsigned int i, offs; + + for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3) { + urb->iso_frame_desc[i].length = 3; + urb->iso_frame_desc[i].offset = offs; + } + urb->interval = 1; + return 0; +} + +/* + * return value: 0 if descriptor should be restarted, -1 otherwise + */ +static int usbout_sync_retire_desc(struct usbout *u, struct urb *urb) +{ + unsigned char *cp = urb->transfer_buffer; + unsigned int f, i; + + for (i = 0; i < SYNCFRAMES; i++, cp += 3) { + if (urb->iso_frame_desc[i].status) { + dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status)); + continue; + } + if (urb->iso_frame_desc[i].actual_length < 3) { + dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u length %d\n", i, urb->iso_frame_desc[i].actual_length)); + continue; + } + f = cp[0] | (cp[1] << 8) | (cp[2] << 16); + if (abs(f - u->freqn) > (u->freqn >> 3) || f > u->freqmax) { + printk(KERN_WARNING "usbout_sync_retire_desc: requested frequency %u (nominal %u) out of range!\n", f, u->freqn); + continue; + } + u->freqm = f; + } + return 0; +} + +static void usbout_sync_completed(struct urb *urb, struct pt_regs *regs) +{ + struct usb_audiodev *as = (struct usb_audiodev *)urb->context; + struct usbout *u = &as->usbout; + unsigned long flags; + unsigned int mask; + int suret = 0; + +#if 0 + printk(KERN_DEBUG "usbout_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags); +#endif + if (urb == u->surb[0].urb) + mask = FLG_SYNC0RUNNING; + else if (urb == u->surb[1].urb) + mask = FLG_SYNC1RUNNING; + else { + mask = 0; + printk(KERN_ERR "usbout_sync_completed: panic: unknown URB\n"); + } + urb->dev = as->state->usbdev; + spin_lock_irqsave(&as->lock, flags); + if (!usbout_sync_retire_desc(u, urb) && + u->flags & FLG_RUNNING && + !usbout_sync_prepare_desc(u, urb) && + (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) { + u->flags |= mask; + } else { + u->flags &= ~(mask | FLG_RUNNING); + wake_up(&u->dma.wait); + dprintk((KERN_DEBUG "usbout_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret)); + } + spin_unlock_irqrestore(&as->lock, flags); +} + +static int usbout_start(struct usb_audiodev *as) +{ + struct usb_device *dev = as->state->usbdev; + struct usbout *u = &as->usbout; + struct urb *urb; + unsigned long flags; + unsigned int maxsze, bufsz; + +#if 0 + printk(KERN_DEBUG "usbout_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n", + dev->devnum, u->format, u->dma.format, u->dma.srate); +#endif + /* allocate USB storage if not already done */ + spin_lock_irqsave(&as->lock, flags); + if (!(u->flags & FLG_CONNECTED)) { + spin_unlock_irqrestore(&as->lock, flags); + return -EIO; + } + if (!(u->flags & FLG_RUNNING)) { + spin_unlock_irqrestore(&as->lock, flags); + u->freqn = u->freqm = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */ + u->freqmax = u->freqn + (u->freqn >> 2); + u->phase = 0; + maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format)); + bufsz = DESCFRAMES * maxsze; + if (u->durb[0].urb->transfer_buffer) + kfree(u->durb[0].urb->transfer_buffer); + u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL); + u->durb[0].urb->transfer_buffer_length = bufsz; + if (u->durb[1].urb->transfer_buffer) + kfree(u->durb[1].urb->transfer_buffer); + u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL); + u->durb[1].urb->transfer_buffer_length = bufsz; + if (u->syncpipe) { + if (u->surb[0].urb->transfer_buffer) + kfree(u->surb[0].urb->transfer_buffer); + u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL); + u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES; + if (u->surb[1].urb->transfer_buffer) + kfree(u->surb[1].urb->transfer_buffer); + u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL); + u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES; + } + if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer || + (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) { + printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum); + return 0; + } + spin_lock_irqsave(&as->lock, flags); + } + if (u->dma.count <= 0 && !u->dma.mapped) { + spin_unlock_irqrestore(&as->lock, flags); + return 0; + } + u->flags |= FLG_RUNNING; + if (!(u->flags & FLG_URB0RUNNING)) { + urb = u->durb[0].urb; + urb->dev = dev; + urb->pipe = u->datapipe; + urb->transfer_flags = URB_ISO_ASAP; + urb->number_of_packets = DESCFRAMES; + urb->context = as; + urb->complete = usbout_completed; + if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC)) + u->flags |= FLG_URB0RUNNING; + else + u->flags &= ~FLG_RUNNING; + } + if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) { + urb = u->durb[1].urb; + urb->dev = dev; + urb->pipe = u->datapipe; + urb->transfer_flags = URB_ISO_ASAP; + urb->number_of_packets = DESCFRAMES; + urb->context = as; + urb->complete = usbout_completed; + if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC)) + u->flags |= FLG_URB1RUNNING; + else + u->flags &= ~FLG_RUNNING; + } + if (u->syncpipe) { + if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) { + urb = u->surb[0].urb; + urb->dev = dev; + urb->pipe = u->syncpipe; + urb->transfer_flags = URB_ISO_ASAP; + urb->number_of_packets = SYNCFRAMES; + urb->context = as; + urb->complete = usbout_sync_completed; + /* stride: u->syncinterval */ + if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC)) + u->flags |= FLG_SYNC0RUNNING; + else + u->flags &= ~FLG_RUNNING; + } + if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) { + urb = u->surb[1].urb; + urb->dev = dev; + urb->pipe = u->syncpipe; + urb->transfer_flags = URB_ISO_ASAP; + urb->number_of_packets = SYNCFRAMES; + urb->context = as; + urb->complete = usbout_sync_completed; + /* stride: u->syncinterval */ + if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC)) + u->flags |= FLG_SYNC1RUNNING; + else + u->flags &= ~FLG_RUNNING; + } + } + spin_unlock_irqrestore(&as->lock, flags); + return 0; +} + +/* --------------------------------------------------------------------- */ + +static unsigned int format_goodness(struct audioformat *afp, unsigned int fmt, unsigned int srate) +{ + unsigned int g = 0; + + if (srate < afp->sratelo) + g += afp->sratelo - srate; + if (srate > afp->sratehi) + g += srate - afp->sratehi; + if (AFMT_ISSTEREO(afp->format) && !AFMT_ISSTEREO(fmt)) + g += 0x100000; + if (!AFMT_ISSTEREO(afp->format) && AFMT_ISSTEREO(fmt)) + g += 0x400000; + if (AFMT_IS16BIT(afp->format) && !AFMT_IS16BIT(fmt)) + g += 0x100000; + if (!AFMT_IS16BIT(afp->format) && AFMT_IS16BIT(fmt)) + g += 0x400000; + return g; +} + +static int find_format(struct audioformat *afp, unsigned int nr, unsigned int fmt, unsigned int srate) +{ + unsigned int i, g, gb = ~0; + int j = -1; /* default to failure */ + + /* find "best" format (according to format_goodness) */ + for (i = 0; i < nr; i++) { + g = format_goodness(&afp[i], fmt, srate); + if (g >= gb) + continue; + j = i; + gb = g; + } + return j; +} + +static int set_format_in(struct usb_audiodev *as) +{ + struct usb_device *dev = as->state->usbdev; + struct usb_host_interface *alts; + struct usb_interface *iface; + struct usbin *u = &as->usbin; + struct dmabuf *d = &u->dma; + struct audioformat *fmt; + unsigned int ep; + unsigned char data[3]; + int fmtnr, ret; + + iface = usb_ifnum_to_if(dev, u->interface); + if (!iface) + return 0; + + fmtnr = find_format(as->fmtin, as->numfmtin, d->format, d->srate); + if (fmtnr < 0) { + printk(KERN_ERR "usbaudio: set_format_in(): failed to find desired format/speed combination.\n"); + return -1; + } + + fmt = as->fmtin + fmtnr; + alts = usb_altnum_to_altsetting(iface, fmt->altsetting); + u->format = fmt->format; + u->datapipe = usb_rcvisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf); + u->syncpipe = u->syncinterval = 0; + if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x08) { + if (alts->desc.bNumEndpoints < 2 || + alts->endpoint[1].desc.bmAttributes != 0x01 || + alts->endpoint[1].desc.bSynchAddress != 0 || + alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress & 0x7f)) { + printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims adaptive in " + "but has invalid synch pipe; treating as asynchronous in\n", + dev->devnum, u->interface, fmt->altsetting); + } else { + u->syncpipe = usb_sndisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf); + u->syncinterval = alts->endpoint[1].desc.bRefresh; + } + } + if (d->srate < fmt->sratelo) + d->srate = fmt->sratelo; + if (d->srate > fmt->sratehi) + d->srate = fmt->sratehi; + dprintk((KERN_DEBUG "usbaudio: set_format_in: usb_set_interface %u %u\n", + u->interface, fmt->altsetting)); + if (usb_set_interface(dev, alts->desc.bInterfaceNumber, fmt->altsetting) < 0) { + printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n", + dev->devnum, u->interface, fmt->altsetting); + return -1; + } + if (fmt->sratelo == fmt->sratehi) + return 0; + ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN); + /* if endpoint has pitch control, enable it */ + if (fmt->attributes & 0x02) { + data[0] = 1; + if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, + PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) { + printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n", + ret, dev->devnum, u->interface, ep, d->srate); + return -1; + } + } + /* if endpoint has sampling rate control, set it */ + if (fmt->attributes & 0x01) { + data[0] = d->srate; + data[1] = d->srate >> 8; + data[2] = d->srate >> 16; + if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, + SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) { + printk(KERN_ERR "usbaudio: failure (error %d) to set input sampling frequency device %d interface %u endpoint 0x%x to %u\n", + ret, dev->devnum, u->interface, ep, d->srate); + return -1; + } + if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN, + SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) { + printk(KERN_ERR "usbaudio: failure (error %d) to get input sampling frequency device %d interface %u endpoint 0x%x\n", + ret, dev->devnum, u->interface, ep); + return -1; + } + dprintk((KERN_DEBUG "usbaudio: set_format_in: device %d interface %d altsetting %d srate req: %u real %u\n", + dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16))); + d->srate = data[0] | (data[1] << 8) | (data[2] << 16); + } + dprintk((KERN_DEBUG "usbaudio: set_format_in: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate)); + return 0; +} + +static int set_format_out(struct usb_audiodev *as) +{ + struct usb_device *dev = as->state->usbdev; + struct usb_host_interface *alts; + struct usb_interface *iface; + struct usbout *u = &as->usbout; + struct dmabuf *d = &u->dma; + struct audioformat *fmt; + unsigned int ep; + unsigned char data[3]; + int fmtnr, ret; + + iface = usb_ifnum_to_if(dev, u->interface); + if (!iface) + return 0; + + fmtnr = find_format(as->fmtout, as->numfmtout, d->format, d->srate); + if (fmtnr < 0) { + printk(KERN_ERR "usbaudio: set_format_out(): failed to find desired format/speed combination.\n"); + return -1; + } + + fmt = as->fmtout + fmtnr; + u->format = fmt->format; + alts = usb_altnum_to_altsetting(iface, fmt->altsetting); + u->datapipe = usb_sndisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf); + u->syncpipe = u->syncinterval = 0; + if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x04) { +#if 0 + printk(KERN_DEBUG "bNumEndpoints 0x%02x endpoint[1].bmAttributes 0x%02x\n" + KERN_DEBUG "endpoint[1].bSynchAddress 0x%02x endpoint[1].bEndpointAddress 0x%02x\n" + KERN_DEBUG "endpoint[0].bSynchAddress 0x%02x\n", alts->bNumEndpoints, + alts->endpoint[1].bmAttributes, alts->endpoint[1].bSynchAddress, + alts->endpoint[1].bEndpointAddress, alts->endpoint[0].bSynchAddress); +#endif + if (alts->desc.bNumEndpoints < 2 || + alts->endpoint[1].desc.bmAttributes != 0x01 || + alts->endpoint[1].desc.bSynchAddress != 0 || + alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress | 0x80)) { + printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims asynch out " + "but has invalid synch pipe; treating as adaptive out\n", + dev->devnum, u->interface, fmt->altsetting); + } else { + u->syncpipe = usb_rcvisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf); + u->syncinterval = alts->endpoint[1].desc.bRefresh; + } + } + if (d->srate < fmt->sratelo) + d->srate = fmt->sratelo; + if (d->srate > fmt->sratehi) + d->srate = fmt->sratehi; + dprintk((KERN_DEBUG "usbaudio: set_format_out: usb_set_interface %u %u\n", + u->interface, fmt->altsetting)); + if (usb_set_interface(dev, u->interface, fmt->altsetting) < 0) { + printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n", + dev->devnum, u->interface, fmt->altsetting); + return -1; + } + if (fmt->sratelo == fmt->sratehi) + return 0; + ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN); + /* if endpoint has pitch control, enable it */ + if (fmt->attributes & 0x02) { + data[0] = 1; + if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, + PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) { + printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n", + ret, dev->devnum, u->interface, ep, d->srate); + return -1; + } + } + /* if endpoint has sampling rate control, set it */ + if (fmt->attributes & 0x01) { + data[0] = d->srate; + data[1] = d->srate >> 8; + data[2] = d->srate >> 16; + if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, + SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) { + printk(KERN_ERR "usbaudio: failure (error %d) to set output sampling frequency device %d interface %u endpoint 0x%x to %u\n", + ret, dev->devnum, u->interface, ep, d->srate); + return -1; + } + if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN, + SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) { + printk(KERN_ERR "usbaudio: failure (error %d) to get output sampling frequency device %d interface %u endpoint 0x%x\n", + ret, dev->devnum, u->interface, ep); + return -1; + } + dprintk((KERN_DEBUG "usbaudio: set_format_out: device %d interface %d altsetting %d srate req: %u real %u\n", + dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16))); + d->srate = data[0] | (data[1] << 8) | (data[2] << 16); + } + dprintk((KERN_DEBUG "usbaudio: set_format_out: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate)); + return 0; +} + +static int set_format(struct usb_audiodev *s, unsigned int fmode, unsigned int fmt, unsigned int srate) +{ + int ret1 = 0, ret2 = 0; + + if (!(fmode & (FMODE_READ|FMODE_WRITE))) + return -EINVAL; + if (fmode & FMODE_READ) { + usbin_stop(s); + s->usbin.dma.ready = 0; + if (fmt == AFMT_QUERY) + fmt = s->usbin.dma.format; + else + s->usbin.dma.format = fmt; + if (!srate) + srate = s->usbin.dma.srate; + else + s->usbin.dma.srate = srate; + } + if (fmode & FMODE_WRITE) { + usbout_stop(s); + s->usbout.dma.ready = 0; + if (fmt == AFMT_QUERY) + fmt = s->usbout.dma.format; + else + s->usbout.dma.format = fmt; + if (!srate) + srate = s->usbout.dma.srate; + else + s->usbout.dma.srate = srate; + } + if (fmode & FMODE_READ) + ret1 = set_format_in(s); + if (fmode & FMODE_WRITE) + ret2 = set_format_out(s); + return ret1 ? ret1 : ret2; +} + +/* --------------------------------------------------------------------- */ + +static int wrmixer(struct usb_mixerdev *ms, unsigned mixch, unsigned value) +{ + struct usb_device *dev = ms->state->usbdev; + unsigned char data[2]; + struct mixerchannel *ch; + int v1, v2, v3; + + if (mixch >= ms->numch) + return -1; + ch = &ms->ch[mixch]; + v3 = ch->maxval - ch->minval; + v1 = value & 0xff; + v2 = (value >> 8) & 0xff; + if (v1 > 100) + v1 = 100; + if (v2 > 100) + v2 = 100; + if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))) + v2 = v1; + ch->value = v1 | (v2 << 8); + v1 = (v1 * v3) / 100 + ch->minval; + v2 = (v2 * v3) / 100 + ch->minval; + switch (ch->selector) { + case 0: /* mixer unit request */ + data[0] = v1; + data[1] = v1 >> 8; + if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + (ch->chnum << 8) | 1, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0) + goto err; + if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))) + return 0; + data[0] = v2; + data[1] = v2 >> 8; + if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)), + ms->iface | (ch->unitid << 8), data, 2, 1000) < 0) + goto err; + return 0; + + /* various feature unit controls */ + case VOLUME_CONTROL: + data[0] = v1; + data[1] = v1 >> 8; + if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0) + goto err; + if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))) + return 0; + data[0] = v2; + data[1] = v2 >> 8; + if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 2, 1000) < 0) + goto err; + return 0; + + case BASS_CONTROL: + case MID_CONTROL: + case TREBLE_CONTROL: + data[0] = v1 >> 8; + if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 1, 1000) < 0) + goto err; + if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))) + return 0; + data[0] = v2 >> 8; + if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 1, 1000) < 0) + goto err; + return 0; + + default: + return -1; + } + return 0; + + err: + printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n", + dev->devnum, ms->iface, ch->unitid, ch->chnum, ch->selector); + return -1; +} + +static int get_rec_src(struct usb_mixerdev *ms) +{ + struct usb_device *dev = ms->state->usbdev; + unsigned int mask = 0, retmask = 0; + unsigned int i, j; + unsigned char buf; + int err = 0; + + for (i = 0; i < ms->numch; i++) { + if (!ms->ch[i].slctunitid || (mask & (1 << i))) + continue; + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + 0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) { + err = -EIO; + printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n", + dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff); + continue; + } + for (j = i; j < ms->numch; j++) { + if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff) + continue; + mask |= 1 << j; + if (buf == (ms->ch[j].slctunitid >> 8)) + retmask |= 1 << ms->ch[j].osschannel; + } + } + if (err) + return -EIO; + return retmask; +} + +static int set_rec_src(struct usb_mixerdev *ms, int srcmask) +{ + struct usb_device *dev = ms->state->usbdev; + unsigned int mask = 0, smask, bmask; + unsigned int i, j; + unsigned char buf; + int err = 0; + + for (i = 0; i < ms->numch; i++) { + if (!ms->ch[i].slctunitid || (mask & (1 << i))) + continue; + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + 0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) { + err = -EIO; + printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n", + dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff); + continue; + } + /* first generate smask */ + smask = bmask = 0; + for (j = i; j < ms->numch; j++) { + if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff) + continue; + smask |= 1 << ms->ch[j].osschannel; + if (buf == (ms->ch[j].slctunitid >> 8)) + bmask |= 1 << ms->ch[j].osschannel; + mask |= 1 << j; + } + /* check for multiple set sources */ + j = hweight32(srcmask & smask); + if (j == 0) + continue; + if (j > 1) + srcmask &= ~bmask; + for (j = i; j < ms->numch; j++) { + if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff) + continue; + if (!(srcmask & (1 << ms->ch[j].osschannel))) + continue; + buf = ms->ch[j].slctunitid >> 8; + if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + 0, ms->iface | (ms->ch[j].slctunitid << 8), &buf, 1, 1000) < 0) { + err = -EIO; + printk(KERN_ERR "usbaudio: selector write request device %u if %u unit %u failed\n", + dev->devnum, ms->iface, ms->ch[j].slctunitid & 0xff); + continue; + } + } + } + return err ? -EIO : 0; +} + +/* --------------------------------------------------------------------- */ + +/* + * should be called with open_sem hold, so that no new processes + * look at the audio device to be destroyed + */ + +static void release(struct usb_audio_state *s) +{ + struct usb_audiodev *as; + struct usb_mixerdev *ms; + + s->count--; + if (s->count) { + up(&open_sem); + return; + } + up(&open_sem); + wake_up(&open_wait); + while (!list_empty(&s->audiolist)) { + as = list_entry(s->audiolist.next, struct usb_audiodev, list); + list_del(&as->list); + usbin_release(as); + usbout_release(as); + dmabuf_release(&as->usbin.dma); + dmabuf_release(&as->usbout.dma); + usb_free_urb(as->usbin.durb[0].urb); + usb_free_urb(as->usbin.durb[1].urb); + usb_free_urb(as->usbin.surb[0].urb); + usb_free_urb(as->usbin.surb[1].urb); + usb_free_urb(as->usbout.durb[0].urb); + usb_free_urb(as->usbout.durb[1].urb); + usb_free_urb(as->usbout.surb[0].urb); + usb_free_urb(as->usbout.surb[1].urb); + kfree(as); + } + while (!list_empty(&s->mixerlist)) { + ms = list_entry(s->mixerlist.next, struct usb_mixerdev, list); + list_del(&ms->list); + kfree(ms); + } + kfree(s); +} + +static inline int prog_dmabuf_in(struct usb_audiodev *as) +{ + usbin_stop(as); + return dmabuf_init(&as->usbin.dma); +} + +static inline int prog_dmabuf_out(struct usb_audiodev *as) +{ + usbout_stop(as); + return dmabuf_init(&as->usbout.dma); +} + +/* --------------------------------------------------------------------- */ + +static int usb_audio_open_mixdev(struct inode *inode, struct file *file) +{ + unsigned int minor = iminor(inode); + struct usb_mixerdev *ms; + struct usb_audio_state *s; + + down(&open_sem); + list_for_each_entry(s, &audiodevs, audiodev) { + list_for_each_entry(ms, &s->mixerlist, list) { + if (ms->dev_mixer == minor) + goto mixer_found; + } + } + up(&open_sem); + return -ENODEV; + + mixer_found: + if (!s->usbdev) { + up(&open_sem); + return -EIO; + } + file->private_data = ms; + s->count++; + + up(&open_sem); + return nonseekable_open(inode, file); +} + +static int usb_audio_release_mixdev(struct inode *inode, struct file *file) +{ + struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data; + struct usb_audio_state *s; + + lock_kernel(); + s = ms->state; + down(&open_sem); + release(s); + unlock_kernel(); + return 0; +} + +static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +{ + struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data; + int i, j, val; + int __user *user_arg = (int __user *)arg; + + if (!ms->state->usbdev) + return -ENODEV; + + if (cmd == SOUND_MIXER_INFO) { + mixer_info info; + + memset(&info, 0, sizeof(info)); + strncpy(info.id, "USB_AUDIO", sizeof(info.id)); + strncpy(info.name, "USB Audio Class Driver", sizeof(info.name)); + info.modify_counter = ms->modcnt; + if (copy_to_user((void __user *)arg, &info, sizeof(info))) + return -EFAULT; + return 0; + } + if (cmd == SOUND_OLD_MIXER_INFO) { + _old_mixer_info info; + + memset(&info, 0, sizeof(info)); + strncpy(info.id, "USB_AUDIO", sizeof(info.id)); + strncpy(info.name, "USB Audio Class Driver", sizeof(info.name)); + if (copy_to_user((void __user *)arg, &info, sizeof(info))) + return -EFAULT; + return 0; + } + if (cmd == OSS_GETVERSION) + return put_user(SOUND_VERSION, user_arg); + if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int)) + return -EINVAL; + if (_IOC_DIR(cmd) == _IOC_READ) { + switch (_IOC_NR(cmd)) { + case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */ + val = get_rec_src(ms); + if (val < 0) + return val; + return put_user(val, user_arg); + + case SOUND_MIXER_DEVMASK: /* Arg contains a bit for each supported device */ + for (val = i = 0; i < ms->numch; i++) + val |= 1 << ms->ch[i].osschannel; + return put_user(val, user_arg); + + case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */ + for (val = i = 0; i < ms->numch; i++) + if (ms->ch[i].slctunitid) + val |= 1 << ms->ch[i].osschannel; + return put_user(val, user_arg); + + case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */ + for (val = i = 0; i < ms->numch; i++) + if (ms->ch[i].flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) + val |= 1 << ms->ch[i].osschannel; + return put_user(val, user_arg); + + case SOUND_MIXER_CAPS: + return put_user(SOUND_CAP_EXCL_INPUT, user_arg); + + default: + i = _IOC_NR(cmd); + if (i >= SOUND_MIXER_NRDEVICES) + return -EINVAL; + for (j = 0; j < ms->numch; j++) { + if (ms->ch[j].osschannel == i) { + return put_user(ms->ch[j].value, user_arg); + } + } + return -EINVAL; + } + } + if (_IOC_DIR(cmd) != (_IOC_READ|_IOC_WRITE)) + return -EINVAL; + ms->modcnt++; + switch (_IOC_NR(cmd)) { + case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */ + if (get_user(val, user_arg)) + return -EFAULT; + return set_rec_src(ms, val); + + default: + i = _IOC_NR(cmd); + if (i >= SOUND_MIXER_NRDEVICES) + return -EINVAL; + for (j = 0; j < ms->numch && ms->ch[j].osschannel != i; j++); + if (j >= ms->numch) + return -EINVAL; + if (get_user(val, user_arg)) + return -EFAULT; + if (wrmixer(ms, j, val)) + return -EIO; + return put_user(ms->ch[j].value, user_arg); + } +} + +static /*const*/ struct file_operations usb_mixer_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .ioctl = usb_audio_ioctl_mixdev, + .open = usb_audio_open_mixdev, + .release = usb_audio_release_mixdev, +}; + +/* --------------------------------------------------------------------- */ + +static int drain_out(struct usb_audiodev *as, int nonblock) +{ + DECLARE_WAITQUEUE(wait, current); + unsigned long flags; + int count, tmo; + + if (as->usbout.dma.mapped || !as->usbout.dma.ready) + return 0; + usbout_start(as); + add_wait_queue(&as->usbout.dma.wait, &wait); + for (;;) { + __set_current_state(TASK_INTERRUPTIBLE); + spin_lock_irqsave(&as->lock, flags); + count = as->usbout.dma.count; + spin_unlock_irqrestore(&as->lock, flags); + if (count <= 0) + break; + if (signal_pending(current)) + break; + if (nonblock) { + remove_wait_queue(&as->usbout.dma.wait, &wait); + set_current_state(TASK_RUNNING); + return -EBUSY; + } + tmo = 3 * HZ * count / as->usbout.dma.srate; + tmo >>= AFMT_BYTESSHIFT(as->usbout.dma.format); + if (!schedule_timeout(tmo + 1)) { + printk(KERN_DEBUG "usbaudio: dma timed out??\n"); + break; + } + } + remove_wait_queue(&as->usbout.dma.wait, &wait); + set_current_state(TASK_RUNNING); + if (signal_pending(current)) + return -ERESTARTSYS; + return 0; +} + +/* --------------------------------------------------------------------- */ + +static ssize_t usb_audio_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) +{ + struct usb_audiodev *as = (struct usb_audiodev *)file->private_data; + DECLARE_WAITQUEUE(wait, current); + ssize_t ret = 0; + unsigned long flags; + unsigned int ptr; + int cnt, err; + + if (as->usbin.dma.mapped) + return -ENXIO; + if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as))) + return ret; + if (!access_ok(VERIFY_WRITE, buffer, count)) + return -EFAULT; + add_wait_queue(&as->usbin.dma.wait, &wait); + while (count > 0) { + spin_lock_irqsave(&as->lock, flags); + ptr = as->usbin.dma.rdptr; + cnt = as->usbin.dma.count; + /* set task state early to avoid wakeup races */ + if (cnt <= 0) + __set_current_state(TASK_INTERRUPTIBLE); + spin_unlock_irqrestore(&as->lock, flags); + if (cnt > count) + cnt = count; + if (cnt <= 0) { + if (usbin_start(as)) { + if (!ret) + ret = -ENODEV; + break; + } + if (file->f_flags & O_NONBLOCK) { + if (!ret) + ret = -EAGAIN; + break; + } + schedule(); + if (signal_pending(current)) { + if (!ret) + ret = -ERESTARTSYS; + break; + } + continue; + } + if ((err = dmabuf_copyout_user(&as->usbin.dma, ptr, buffer, cnt))) { + if (!ret) + ret = err; + break; + } + ptr += cnt; + if (ptr >= as->usbin.dma.dmasize) + ptr -= as->usbin.dma.dmasize; + spin_lock_irqsave(&as->lock, flags); + as->usbin.dma.rdptr = ptr; + as->usbin.dma.count -= cnt; + spin_unlock_irqrestore(&as->lock, flags); + count -= cnt; + buffer += cnt; + ret += cnt; + } + __set_current_state(TASK_RUNNING); + remove_wait_queue(&as->usbin.dma.wait, &wait); + return ret; +} + +static ssize_t usb_audio_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) +{ + struct usb_audiodev *as = (struct usb_audiodev *)file->private_data; + DECLARE_WAITQUEUE(wait, current); + ssize_t ret = 0; + unsigned long flags; + unsigned int ptr; + unsigned int start_thr; + int cnt, err; + + if (as->usbout.dma.mapped) + return -ENXIO; + if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as))) + return ret; + if (!access_ok(VERIFY_READ, buffer, count)) + return -EFAULT; + start_thr = (as->usbout.dma.srate << AFMT_BYTESSHIFT(as->usbout.dma.format)) / (1000 / (3 * DESCFRAMES)); + add_wait_queue(&as->usbout.dma.wait, &wait); + while (count > 0) { +#if 0 + printk(KERN_DEBUG "usb_audio_write: count %u dma: count %u rdptr %u wrptr %u dmasize %u fragsize %u flags 0x%02x taskst 0x%lx\n", + count, as->usbout.dma.count, as->usbout.dma.rdptr, as->usbout.dma.wrptr, as->usbout.dma.dmasize, as->usbout.dma.fragsize, + as->usbout.flags, current->state); +#endif + spin_lock_irqsave(&as->lock, flags); + if (as->usbout.dma.count < 0) { + as->usbout.dma.count = 0; + as->usbout.dma.rdptr = as->usbout.dma.wrptr; + } + ptr = as->usbout.dma.wrptr; + cnt = as->usbout.dma.dmasize - as->usbout.dma.count; + /* set task state early to avoid wakeup races */ + if (cnt <= 0) + __set_current_state(TASK_INTERRUPTIBLE); + spin_unlock_irqrestore(&as->lock, flags); + if (cnt > count) + cnt = count; + if (cnt <= 0) { + if (usbout_start(as)) { + if (!ret) + ret = -ENODEV; + break; + } + if (file->f_flags & O_NONBLOCK) { + if (!ret) + ret = -EAGAIN; + break; + } + schedule(); + if (signal_pending(current)) { + if (!ret) + ret = -ERESTARTSYS; + break; + } + continue; + } + if ((err = dmabuf_copyin_user(&as->usbout.dma, ptr, buffer, cnt))) { + if (!ret) + ret = err; + break; + } + ptr += cnt; + if (ptr >= as->usbout.dma.dmasize) + ptr -= as->usbout.dma.dmasize; + spin_lock_irqsave(&as->lock, flags); + as->usbout.dma.wrptr = ptr; + as->usbout.dma.count += cnt; + spin_unlock_irqrestore(&as->lock, flags); + count -= cnt; + buffer += cnt; + ret += cnt; + if (as->usbout.dma.count >= start_thr && usbout_start(as)) { + if (!ret) + ret = -ENODEV; + break; + } + } + __set_current_state(TASK_RUNNING); + remove_wait_queue(&as->usbout.dma.wait, &wait); + return ret; +} + +/* Called without the kernel lock - fine */ +static unsigned int usb_audio_poll(struct file *file, struct poll_table_struct *wait) +{ + struct usb_audiodev *as = (struct usb_audiodev *)file->private_data; + unsigned long flags; + unsigned int mask = 0; + + if (file->f_mode & FMODE_WRITE) { + if (!as->usbout.dma.ready) + prog_dmabuf_out(as); + poll_wait(file, &as->usbout.dma.wait, wait); + } + if (file->f_mode & FMODE_READ) { + if (!as->usbin.dma.ready) + prog_dmabuf_in(as); + poll_wait(file, &as->usbin.dma.wait, wait); + } + spin_lock_irqsave(&as->lock, flags); + if (file->f_mode & FMODE_READ) { + if (as->usbin.dma.count >= (signed)as->usbin.dma.fragsize) + mask |= POLLIN | POLLRDNORM; + } + if (file->f_mode & FMODE_WRITE) { + if (as->usbout.dma.mapped) { + if (as->usbout.dma.count >= (signed)as->usbout.dma.fragsize) + mask |= POLLOUT | POLLWRNORM; + } else { + if ((signed)as->usbout.dma.dmasize >= as->usbout.dma.count + (signed)as->usbout.dma.fragsize) + mask |= POLLOUT | POLLWRNORM; + } + } + spin_unlock_irqrestore(&as->lock, flags); + return mask; +} + +static int usb_audio_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct usb_audiodev *as = (struct usb_audiodev *)file->private_data; + struct dmabuf *db; + int ret = -EINVAL; + + lock_kernel(); + if (vma->vm_flags & VM_WRITE) { + if ((ret = prog_dmabuf_out(as)) != 0) + goto out; + db = &as->usbout.dma; + } else if (vma->vm_flags & VM_READ) { + if ((ret = prog_dmabuf_in(as)) != 0) + goto out; + db = &as->usbin.dma; + } else + goto out; + + ret = -EINVAL; + if (vma->vm_pgoff != 0) + goto out; + + ret = dmabuf_mmap(vma, db, vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_page_prot); +out: + unlock_kernel(); + return ret; +} + +static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +{ + struct usb_audiodev *as = (struct usb_audiodev *)file->private_data; + struct usb_audio_state *s = as->state; + int __user *user_arg = (int __user *)arg; + unsigned long flags; + audio_buf_info abinfo; + count_info cinfo; + int val = 0; + int val2, mapped, ret; + + if (!s->usbdev) + return -EIO; + mapped = ((file->f_mode & FMODE_WRITE) && as->usbout.dma.mapped) || + ((file->f_mode & FMODE_READ) && as->usbin.dma.mapped); +#if 0 + if (arg) + get_user(val, (int *)arg); + printk(KERN_DEBUG "usbaudio: usb_audio_ioctl cmd=%x arg=%lx *arg=%d\n", cmd, arg, val) +#endif + switch (cmd) { + case OSS_GETVERSION: + return put_user(SOUND_VERSION, user_arg); + + case SNDCTL_DSP_SYNC: + if (file->f_mode & FMODE_WRITE) + return drain_out(as, 0/*file->f_flags & O_NONBLOCK*/); + return 0; + + case SNDCTL_DSP_SETDUPLEX: + return 0; + + case SNDCTL_DSP_GETCAPS: + return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER | + DSP_CAP_MMAP | DSP_CAP_BATCH, user_arg); + + case SNDCTL_DSP_RESET: + if (file->f_mode & FMODE_WRITE) { + usbout_stop(as); + as->usbout.dma.rdptr = as->usbout.dma.wrptr = as->usbout.dma.count = as->usbout.dma.total_bytes = 0; + } + if (file->f_mode & FMODE_READ) { + usbin_stop(as); + as->usbin.dma.rdptr = as->usbin.dma.wrptr = as->usbin.dma.count = as->usbin.dma.total_bytes = 0; + } + return 0; + + case SNDCTL_DSP_SPEED: + if (get_user(val, user_arg)) + return -EFAULT; + if (val >= 0) { + if (val < 4000) + val = 4000; + if (val > 100000) + val = 100000; + if (set_format(as, file->f_mode, AFMT_QUERY, val)) + return -EIO; + } + return put_user((file->f_mode & FMODE_READ) ? + as->usbin.dma.srate : as->usbout.dma.srate, + user_arg); + + case SNDCTL_DSP_STEREO: + if (get_user(val, user_arg)) + return -EFAULT; + val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format; + if (val) + val2 |= AFMT_STEREO; + else + val2 &= ~AFMT_STEREO; + if (set_format(as, file->f_mode, val2, 0)) + return -EIO; + return 0; + + case SNDCTL_DSP_CHANNELS: + if (get_user(val, user_arg)) + return -EFAULT; + if (val != 0) { + val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format; + if (val == 1) + val2 &= ~AFMT_STEREO; + else + val2 |= AFMT_STEREO; + if (set_format(as, file->f_mode, val2, 0)) + return -EIO; + } + val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format; + return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg); + + case SNDCTL_DSP_GETFMTS: /* Returns a mask */ + return put_user(AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE | + AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE, user_arg); + + case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/ + if (get_user(val, user_arg)) + return -EFAULT; + if (val != AFMT_QUERY) { + if (hweight32(val) != 1) + return -EINVAL; + if (!(val & (AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE | + AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE))) + return -EINVAL; + val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format; + val |= val2 & AFMT_STEREO; + if (set_format(as, file->f_mode, val, 0)) + return -EIO; + } + val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format; + return put_user(val2 & ~AFMT_STEREO, user_arg); + + case SNDCTL_DSP_POST: + return 0; + + case SNDCTL_DSP_GETTRIGGER: + val = 0; + if (file->f_mode & FMODE_READ && as->usbin.flags & FLG_RUNNING) + val |= PCM_ENABLE_INPUT; + if (file->f_mode & FMODE_WRITE && as->usbout.flags & FLG_RUNNING) + val |= PCM_ENABLE_OUTPUT; + return put_user(val, user_arg); + + case SNDCTL_DSP_SETTRIGGER: + if (get_user(val, user_arg)) + return -EFAULT; + if (file->f_mode & FMODE_READ) { + if (val & PCM_ENABLE_INPUT) { + if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as))) + return ret; + if (usbin_start(as)) + return -ENODEV; + } else + usbin_stop(as); + } + if (file->f_mode & FMODE_WRITE) { + if (val & PCM_ENABLE_OUTPUT) { + if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as))) + return ret; + if (usbout_start(as)) + return -ENODEV; + } else + usbout_stop(as); + } + return 0; + + case SNDCTL_DSP_GETOSPACE: + if (!(file->f_mode & FMODE_WRITE)) + return -EINVAL; + if (!(as->usbout.flags & FLG_RUNNING) && (val = prog_dmabuf_out(as)) != 0) + return val; + spin_lock_irqsave(&as->lock, flags); + abinfo.fragsize = as->usbout.dma.fragsize; + abinfo.bytes = as->usbout.dma.dmasize - as->usbout.dma.count; + abinfo.fragstotal = as->usbout.dma.numfrag; + abinfo.fragments = abinfo.bytes >> as->usbout.dma.fragshift; + spin_unlock_irqrestore(&as->lock, flags); + return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0; + + case SNDCTL_DSP_GETISPACE: + if (!(file->f_mode & FMODE_READ)) + return -EINVAL; + if (!(as->usbin.flags & FLG_RUNNING) && (val = prog_dmabuf_in(as)) != 0) + return val; + spin_lock_irqsave(&as->lock, flags); + abinfo.fragsize = as->usbin.dma.fragsize; + abinfo.bytes = as->usbin.dma.count; + abinfo.fragstotal = as->usbin.dma.numfrag; + abinfo.fragments = abinfo.bytes >> as->usbin.dma.fragshift; + spin_unlock_irqrestore(&as->lock, flags); + return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0; + + case SNDCTL_DSP_NONBLOCK: + file->f_flags |= O_NONBLOCK; + return 0; + + case SNDCTL_DSP_GETODELAY: + if (!(file->f_mode & FMODE_WRITE)) + return -EINVAL; + spin_lock_irqsave(&as->lock, flags); + val = as->usbout.dma.count; + spin_unlock_irqrestore(&as->lock, flags); + return put_user(val, user_arg); + + case SNDCTL_DSP_GETIPTR: + if (!(file->f_mode & FMODE_READ)) + return -EINVAL; + spin_lock_irqsave(&as->lock, flags); + cinfo.bytes = as->usbin.dma.total_bytes; + cinfo.blocks = as->usbin.dma.count >> as->usbin.dma.fragshift; + cinfo.ptr = as->usbin.dma.wrptr; + if (as->usbin.dma.mapped) + as->usbin.dma.count &= as->usbin.dma.fragsize-1; + spin_unlock_irqrestore(&as->lock, flags); + if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo))) + return -EFAULT; + return 0; + + case SNDCTL_DSP_GETOPTR: + if (!(file->f_mode & FMODE_WRITE)) + return -EINVAL; + spin_lock_irqsave(&as->lock, flags); + cinfo.bytes = as->usbout.dma.total_bytes; + cinfo.blocks = as->usbout.dma.count >> as->usbout.dma.fragshift; + cinfo.ptr = as->usbout.dma.rdptr; + if (as->usbout.dma.mapped) + as->usbout.dma.count &= as->usbout.dma.fragsize-1; + spin_unlock_irqrestore(&as->lock, flags); + if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo))) + return -EFAULT; + return 0; + + case SNDCTL_DSP_GETBLKSIZE: + if (file->f_mode & FMODE_WRITE) { + if ((val = prog_dmabuf_out(as))) + return val; + return put_user(as->usbout.dma.fragsize, user_arg); + } + if ((val = prog_dmabuf_in(as))) + return val; + return put_user(as->usbin.dma.fragsize, user_arg); + + case SNDCTL_DSP_SETFRAGMENT: + if (get_user(val, user_arg)) + return -EFAULT; + if (file->f_mode & FMODE_READ) { + as->usbin.dma.ossfragshift = val & 0xffff; + as->usbin.dma.ossmaxfrags = (val >> 16) & 0xffff; + if (as->usbin.dma.ossfragshift < 4) + as->usbin.dma.ossfragshift = 4; + if (as->usbin.dma.ossfragshift > 15) + as->usbin.dma.ossfragshift = 15; + if (as->usbin.dma.ossmaxfrags < 4) + as->usbin.dma.ossmaxfrags = 4; + } + if (file->f_mode & FMODE_WRITE) { + as->usbout.dma.ossfragshift = val & 0xffff; + as->usbout.dma.ossmaxfrags = (val >> 16) & 0xffff; + if (as->usbout.dma.ossfragshift < 4) + as->usbout.dma.ossfragshift = 4; + if (as->usbout.dma.ossfragshift > 15) + as->usbout.dma.ossfragshift = 15; + if (as->usbout.dma.ossmaxfrags < 4) + as->usbout.dma.ossmaxfrags = 4; + } + return 0; + + case SNDCTL_DSP_SUBDIVIDE: + if ((file->f_mode & FMODE_READ && as->usbin.dma.subdivision) || + (file->f_mode & FMODE_WRITE && as->usbout.dma.subdivision)) + return -EINVAL; + if (get_user(val, user_arg)) + return -EFAULT; + if (val != 1 && val != 2 && val != 4) + return -EINVAL; + if (file->f_mode & FMODE_READ) + as->usbin.dma.subdivision = val; + if (file->f_mode & FMODE_WRITE) + as->usbout.dma.subdivision = val; + return 0; + + case SOUND_PCM_READ_RATE: + return put_user((file->f_mode & FMODE_READ) ? + as->usbin.dma.srate : as->usbout.dma.srate, + user_arg); + + case SOUND_PCM_READ_CHANNELS: + val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format; + return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg); + + case SOUND_PCM_READ_BITS: + val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format; + return put_user(AFMT_IS16BIT(val2) ? 16 : 8, user_arg); + + case SOUND_PCM_WRITE_FILTER: + case SNDCTL_DSP_SETSYNCRO: + case SOUND_PCM_READ_FILTER: + return -EINVAL; + } + dprintk((KERN_DEBUG "usbaudio: usb_audio_ioctl - no command found\n")); + return -ENOIOCTLCMD; +} + +static int usb_audio_open(struct inode *inode, struct file *file) +{ + unsigned int minor = iminor(inode); + DECLARE_WAITQUEUE(wait, current); + struct usb_audiodev *as; + struct usb_audio_state *s; + + for (;;) { + down(&open_sem); + list_for_each_entry(s, &audiodevs, audiodev) { + list_for_each_entry(as, &s->audiolist, list) { + if (!((as->dev_audio ^ minor) & ~0xf)) + goto device_found; + } + } + up(&open_sem); + return -ENODEV; + + device_found: + if (!s->usbdev) { + up(&open_sem); + return -EIO; + } + /* wait for device to become free */ + if (!(as->open_mode & file->f_mode)) + break; + if (file->f_flags & O_NONBLOCK) { + up(&open_sem); + return -EBUSY; + } + __set_current_state(TASK_INTERRUPTIBLE); + add_wait_queue(&open_wait, &wait); + up(&open_sem); + schedule(); + __set_current_state(TASK_RUNNING); + remove_wait_queue(&open_wait, &wait); + if (signal_pending(current)) + return -ERESTARTSYS; + } + if (file->f_mode & FMODE_READ) + as->usbin.dma.ossfragshift = as->usbin.dma.ossmaxfrags = as->usbin.dma.subdivision = 0; + if (file->f_mode & FMODE_WRITE) + as->usbout.dma.ossfragshift = as->usbout.dma.ossmaxfrags = as->usbout.dma.subdivision = 0; + if (set_format(as, file->f_mode, ((minor & 0xf) == SND_DEV_DSP16) ? AFMT_S16_LE : AFMT_U8 /* AFMT_ULAW */, 8000)) { + up(&open_sem); + return -EIO; + } + file->private_data = as; + as->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE); + s->count++; + up(&open_sem); + return nonseekable_open(inode, file); +} + +static int usb_audio_release(struct inode *inode, struct file *file) +{ + struct usb_audiodev *as = (struct usb_audiodev *)file->private_data; + struct usb_audio_state *s; + struct usb_device *dev; + + lock_kernel(); + s = as->state; + dev = s->usbdev; + if (file->f_mode & FMODE_WRITE) + drain_out(as, file->f_flags & O_NONBLOCK); + down(&open_sem); + if (file->f_mode & FMODE_WRITE) { + usbout_stop(as); + if (dev && as->usbout.interface >= 0) + usb_set_interface(dev, as->usbout.interface, 0); + dmabuf_release(&as->usbout.dma); + usbout_release(as); + } + if (file->f_mode & FMODE_READ) { + usbin_stop(as); + if (dev && as->usbin.interface >= 0) + usb_set_interface(dev, as->usbin.interface, 0); + dmabuf_release(&as->usbin.dma); + usbin_release(as); + } + as->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE); + release(s); + wake_up(&open_wait); + unlock_kernel(); + return 0; +} + +static /*const*/ struct file_operations usb_audio_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .read = usb_audio_read, + .write = usb_audio_write, + .poll = usb_audio_poll, + .ioctl = usb_audio_ioctl, + .mmap = usb_audio_mmap, + .open = usb_audio_open, + .release = usb_audio_release, +}; + +/* --------------------------------------------------------------------- */ + +static int usb_audio_probe(struct usb_interface *iface, + const struct usb_device_id *id); +static void usb_audio_disconnect(struct usb_interface *iface); + +static struct usb_device_id usb_audio_ids [] = { + { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), + .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = 1}, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE (usb, usb_audio_ids); + +static struct usb_driver usb_audio_driver = { + .owner = THIS_MODULE, + .name = "audio", + .probe = usb_audio_probe, + .disconnect = usb_audio_disconnect, + .id_table = usb_audio_ids, +}; + +static void *find_descriptor(void *descstart, unsigned int desclen, void *after, + u8 dtype, int iface, int altsetting) +{ + u8 *p, *end, *next; + int ifc = -1, as = -1; + + p = descstart; + end = p + desclen; + for (; p < end;) { + if (p[0] < 2) + return NULL; + next = p + p[0]; + if (next > end) + return NULL; + if (p[1] == USB_DT_INTERFACE) { + /* minimum length of interface descriptor */ + if (p[0] < 9) + return NULL; + ifc = p[2]; + as = p[3]; + } + if (p[1] == dtype && (!after || (void *)p > after) && + (iface == -1 || iface == ifc) && (altsetting == -1 || altsetting == as)) { + return p; + } + p = next; + } + return NULL; +} + +static void *find_csinterface_descriptor(void *descstart, unsigned int desclen, void *after, u8 dsubtype, int iface, int altsetting) +{ + unsigned char *p; + + p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, altsetting); + while (p) { + if (p[0] >= 3 && p[2] == dsubtype) + return p; + p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, altsetting); + } + return NULL; +} + +static void *find_audiocontrol_unit(void *descstart, unsigned int desclen, void *after, u8 unit, int iface) +{ + unsigned char *p; + + p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, -1); + while (p) { + if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit) + return p; + p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, -1); + } + return NULL; +} + +static void usb_audio_parsestreaming(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, int asifin, int asifout) +{ + struct usb_device *dev = s->usbdev; + struct usb_audiodev *as; + struct usb_host_interface *alts; + struct usb_interface *iface; + struct audioformat *fp; + unsigned char *fmt, *csep; + unsigned int i, j, k, format, idx; + + if (!(as = kmalloc(sizeof(struct usb_audiodev), GFP_KERNEL))) + return; + memset(as, 0, sizeof(struct usb_audiodev)); + init_waitqueue_head(&as->usbin.dma.wait); + init_waitqueue_head(&as->usbout.dma.wait); + spin_lock_init(&as->lock); + as->usbin.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL); + as->usbin.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL); + as->usbin.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL); + as->usbin.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL); + as->usbout.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL); + as->usbout.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL); + as->usbout.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL); + as->usbout.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL); + if ((!as->usbin.durb[0].urb) || + (!as->usbin.durb[1].urb) || + (!as->usbin.surb[0].urb) || + (!as->usbin.surb[1].urb) || + (!as->usbout.durb[0].urb) || + (!as->usbout.durb[1].urb) || + (!as->usbout.surb[0].urb) || + (!as->usbout.surb[1].urb)) { + usb_free_urb(as->usbin.durb[0].urb); + usb_free_urb(as->usbin.durb[1].urb); + usb_free_urb(as->usbin.surb[0].urb); + usb_free_urb(as->usbin.surb[1].urb); + usb_free_urb(as->usbout.durb[0].urb); + usb_free_urb(as->usbout.durb[1].urb); + usb_free_urb(as->usbout.surb[0].urb); + usb_free_urb(as->usbout.surb[1].urb); + kfree(as); + return; + } + as->state = s; + as->usbin.interface = asifin; + as->usbout.interface = asifout; + /* search for input formats */ + if (asifin >= 0) { + as->usbin.flags = FLG_CONNECTED; + iface = usb_ifnum_to_if(dev, asifin); + for (idx = 0; idx < iface->num_altsetting; idx++) { + alts = &iface->altsetting[idx]; + i = alts->desc.bAlternateSetting; + if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2) + continue; + if (alts->desc.bNumEndpoints < 1) { + if (i != 0) { /* altsetting 0 has no endpoints (Section B.3.4.1) */ + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n", + dev->devnum, asifin, i); + } + continue; + } + if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 || + !(alts->endpoint[0].desc.bEndpointAddress & 0x80)) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous in\n", + dev->devnum, asifin, i); + continue; + } + fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifin, i); + if (!fmt) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n", + dev->devnum, asifin, i); + continue; + } + if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n", + dev->devnum, asifin, i); + continue; + } + format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8); + fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifin, i); + if (!fmt) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n", + dev->devnum, asifin, i); + continue; + } + if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n", + dev->devnum, asifin, i); + continue; + } + if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n", + dev->devnum, asifin, i, fmt[4], fmt[5]); + continue; + } + csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifin, i); + if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n", + dev->devnum, asifin, i); + continue; + } + if (as->numfmtin >= MAXFORMATS) + continue; + fp = &as->fmtin[as->numfmtin++]; + if (fmt[5] == 2) + format &= (AFMT_U16_LE | AFMT_S16_LE); + else + format &= (AFMT_U8 | AFMT_S8); + if (fmt[4] == 2) + format |= AFMT_STEREO; + fp->format = format; + fp->altsetting = i; + fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16); + printk(KERN_INFO "usbaudio: valid input sample rate %u\n", fp->sratelo); + for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) { + k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16); + printk(KERN_INFO "usbaudio: valid input sample rate %u\n", k); + if (k > fp->sratehi) + fp->sratehi = k; + if (k < fp->sratelo) + fp->sratelo = k; + } + fp->attributes = csep[3]; + printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n", + dev->devnum, asifin, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes); + } + } + /* search for output formats */ + if (asifout >= 0) { + as->usbout.flags = FLG_CONNECTED; + iface = usb_ifnum_to_if(dev, asifout); + for (idx = 0; idx < iface->num_altsetting; idx++) { + alts = &iface->altsetting[idx]; + i = alts->desc.bAlternateSetting; + if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2) + continue; + if (alts->desc.bNumEndpoints < 1) { + /* altsetting 0 should never have iso EPs */ + if (i != 0) + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n", + dev->devnum, asifout, i); + continue; + } + if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 || + (alts->endpoint[0].desc.bEndpointAddress & 0x80)) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous out\n", + dev->devnum, asifout, i); + continue; + } + /* See USB audio formats manual, section 2 */ + fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifout, i); + if (!fmt) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n", + dev->devnum, asifout, i); + continue; + } + if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n", + dev->devnum, asifout, i); + continue; + } + format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8); + /* Dallas DS4201 workaround */ + if (le16_to_cpu(dev->descriptor.idVendor) == 0x04fa && + le16_to_cpu(dev->descriptor.idProduct) == 0x4201) + format = (AFMT_S16_LE | AFMT_S8); + fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifout, i); + if (!fmt) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n", + dev->devnum, asifout, i); + continue; + } + if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n", + dev->devnum, asifout, i); + continue; + } + if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n", + dev->devnum, asifout, i, fmt[4], fmt[5]); + continue; + } + csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifout, i); + if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) { + printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n", + dev->devnum, asifout, i); + continue; + } + if (as->numfmtout >= MAXFORMATS) + continue; + fp = &as->fmtout[as->numfmtout++]; + if (fmt[5] == 2) + format &= (AFMT_U16_LE | AFMT_S16_LE); + else + format &= (AFMT_U8 | AFMT_S8); + if (fmt[4] == 2) + format |= AFMT_STEREO; + fp->format = format; + fp->altsetting = i; + fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16); + printk(KERN_INFO "usbaudio: valid output sample rate %u\n", fp->sratelo); + for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) { + k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16); + printk(KERN_INFO "usbaudio: valid output sample rate %u\n", k); + if (k > fp->sratehi) + fp->sratehi = k; + if (k < fp->sratelo) + fp->sratelo = k; + } + fp->attributes = csep[3]; + printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n", + dev->devnum, asifout, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes); + } + } + if (as->numfmtin == 0 && as->numfmtout == 0) { + usb_free_urb(as->usbin.durb[0].urb); + usb_free_urb(as->usbin.durb[1].urb); + usb_free_urb(as->usbin.surb[0].urb); + usb_free_urb(as->usbin.surb[1].urb); + usb_free_urb(as->usbout.durb[0].urb); + usb_free_urb(as->usbout.durb[1].urb); + usb_free_urb(as->usbout.surb[0].urb); + usb_free_urb(as->usbout.surb[1].urb); + kfree(as); + return; + } + if ((as->dev_audio = register_sound_dsp(&usb_audio_fops, -1)) < 0) { + printk(KERN_ERR "usbaudio: cannot register dsp\n"); + usb_free_urb(as->usbin.durb[0].urb); + usb_free_urb(as->usbin.durb[1].urb); + usb_free_urb(as->usbin.surb[0].urb); + usb_free_urb(as->usbin.surb[1].urb); + usb_free_urb(as->usbout.durb[0].urb); + usb_free_urb(as->usbout.durb[1].urb); + usb_free_urb(as->usbout.surb[0].urb); + usb_free_urb(as->usbout.surb[1].urb); + kfree(as); + return; + } + printk(KERN_INFO "usbaudio: registered dsp 14,%d\n", as->dev_audio); + /* everything successful */ + list_add_tail(&as->list, &s->audiolist); +} + +struct consmixstate { + struct usb_audio_state *s; + unsigned char *buffer; + unsigned int buflen; + unsigned int ctrlif; + struct mixerchannel mixch[SOUND_MIXER_NRDEVICES]; + unsigned int nrmixch; + unsigned int mixchmask; + unsigned long unitbitmap[32/sizeof(unsigned long)]; + /* return values */ + unsigned int nrchannels; + unsigned int termtype; + unsigned int chconfig; +}; + +static struct mixerchannel *getmixchannel(struct consmixstate *state, unsigned int nr) +{ + struct mixerchannel *c; + + if (nr >= SOUND_MIXER_NRDEVICES) { + printk(KERN_ERR "usbaudio: invalid OSS mixer channel %u\n", nr); + return NULL; + } + if (!(state->mixchmask & (1 << nr))) { + printk(KERN_WARNING "usbaudio: OSS mixer channel %u already in use\n", nr); + return NULL; + } + c = &state->mixch[state->nrmixch++]; + c->osschannel = nr; + state->mixchmask &= ~(1 << nr); + return c; +} + +static unsigned int getvolchannel(struct consmixstate *state) +{ + unsigned int u; + + if ((state->termtype & 0xff00) == 0x0000 && (state->mixchmask & SOUND_MASK_VOLUME)) + return SOUND_MIXER_VOLUME; + if ((state->termtype & 0xff00) == 0x0100) { + if (state->mixchmask & SOUND_MASK_PCM) + return SOUND_MIXER_PCM; + if (state->mixchmask & SOUND_MASK_ALTPCM) + return SOUND_MIXER_ALTPCM; + } + if ((state->termtype & 0xff00) == 0x0200 && (state->mixchmask & SOUND_MASK_MIC)) + return SOUND_MIXER_MIC; + if ((state->termtype & 0xff00) == 0x0300 && (state->mixchmask & SOUND_MASK_SPEAKER)) + return SOUND_MIXER_SPEAKER; + if ((state->termtype & 0xff00) == 0x0500) { + if (state->mixchmask & SOUND_MASK_PHONEIN) + return SOUND_MIXER_PHONEIN; + if (state->mixchmask & SOUND_MASK_PHONEOUT) + return SOUND_MIXER_PHONEOUT; + } + if (state->termtype >= 0x710 && state->termtype <= 0x711 && (state->mixchmask & SOUND_MASK_RADIO)) + return SOUND_MIXER_RADIO; + if (state->termtype >= 0x709 && state->termtype <= 0x70f && (state->mixchmask & SOUND_MASK_VIDEO)) + return SOUND_MIXER_VIDEO; + u = ffs(state->mixchmask & (SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_LINE1 | SOUND_MASK_LINE2 | SOUND_MASK_LINE3 | + SOUND_MASK_DIGITAL1 | SOUND_MASK_DIGITAL2 | SOUND_MASK_DIGITAL3)); + return u-1; +} + +static void prepmixch(struct consmixstate *state) +{ + struct usb_device *dev = state->s->usbdev; + struct mixerchannel *ch; + unsigned char *buf; + __s16 v1; + unsigned int v2, v3; + + if (!state->nrmixch || state->nrmixch > SOUND_MIXER_NRDEVICES) + return; + buf = kmalloc(sizeof(*buf) * 2, GFP_KERNEL); + if (!buf) { + printk(KERN_ERR "prepmixch: out of memory\n") ; + return; + } + + ch = &state->mixch[state->nrmixch-1]; + switch (ch->selector) { + case 0: /* mixer unit request */ + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0) + goto err; + ch->minval = buf[0] | (buf[1] << 8); + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0) + goto err; + ch->maxval = buf[0] | (buf[1] << 8); + v2 = ch->maxval - ch->minval; + if (!v2) + v2 = 1; + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0) + goto err; + v1 = buf[0] | (buf[1] << 8); + v3 = v1 - ch->minval; + v3 = 100 * v3 / v2; + if (v3 > 100) + v3 = 100; + ch->value = v3; + if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) { + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)), + state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0) + goto err; + v1 = buf[0] | (buf[1] << 8); + v3 = v1 - ch->minval; + v3 = 100 * v3 / v2; + if (v3 > 100) + v3 = 100; + } + ch->value |= v3 << 8; + break; + + /* various feature unit controls */ + case VOLUME_CONTROL: + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0) + goto err; + ch->minval = buf[0] | (buf[1] << 8); + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0) + goto err; + ch->maxval = buf[0] | (buf[1] << 8); + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0) + goto err; + v1 = buf[0] | (buf[1] << 8); + v2 = ch->maxval - ch->minval; + v3 = v1 - ch->minval; + if (!v2) + v2 = 1; + v3 = 100 * v3 / v2; + if (v3 > 100) + v3 = 100; + ch->value = v3; + if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) { + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0) + goto err; + v1 = buf[0] | (buf[1] << 8); + v3 = v1 - ch->minval; + v3 = 100 * v3 / v2; + if (v3 > 100) + v3 = 100; + } + ch->value |= v3 << 8; + break; + + case BASS_CONTROL: + case MID_CONTROL: + case TREBLE_CONTROL: + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0) + goto err; + ch->minval = buf[0] << 8; + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0) + goto err; + ch->maxval = buf[0] << 8; + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0) + goto err; + v1 = buf[0] << 8; + v2 = ch->maxval - ch->minval; + v3 = v1 - ch->minval; + if (!v2) + v2 = 1; + v3 = 100 * v3 / v2; + if (v3 > 100) + v3 = 100; + ch->value = v3; + if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) { + if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0) + goto err; + v1 = buf[0] << 8; + v3 = v1 - ch->minval; + v3 = 100 * v3 / v2; + if (v3 > 100) + v3 = 100; + } + ch->value |= v3 << 8; + break; + + default: + goto err; + } + + freebuf: + kfree(buf); + return; + err: + printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n", + dev->devnum, state->ctrlif, ch->unitid, ch->chnum, ch->selector); + if (state->nrmixch) + state->nrmixch--; + goto freebuf; +} + + +static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid); + +static inline int checkmixbmap(unsigned char *bmap, unsigned char flg, unsigned int inidx, unsigned int numoch) +{ + unsigned int idx; + + idx = inidx*numoch; + if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7)))) + return 0; + if (!(flg & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))) + return 1; + idx = (inidx+!!(flg & MIXFLG_STEREOIN))*numoch+!!(flg & MIXFLG_STEREOOUT); + if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7)))) + return 0; + return 1; +} + +static void usb_audio_mixerunit(struct consmixstate *state, unsigned char *mixer) +{ + unsigned int nroutch = mixer[5+mixer[4]]; + unsigned int chidx[SOUND_MIXER_NRDEVICES+1]; + unsigned int termt[SOUND_MIXER_NRDEVICES]; + unsigned char flg = (nroutch >= 2) ? MIXFLG_STEREOOUT : 0; + unsigned char *bmap = &mixer[9+mixer[4]]; + unsigned int bmapsize; + struct mixerchannel *ch; + unsigned int i; + + if (!mixer[4]) { + printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor\n", mixer[3]); + return; + } + if (mixer[4] > SOUND_MIXER_NRDEVICES) { + printk(KERN_ERR "usbaudio: mixer unit %u: too many input pins\n", mixer[3]); + return; + } + chidx[0] = 0; + for (i = 0; i < mixer[4]; i++) { + usb_audio_recurseunit(state, mixer[5+i]); + chidx[i+1] = chidx[i] + state->nrchannels; + termt[i] = state->termtype; + } + state->termtype = 0; + state->chconfig = mixer[6+mixer[4]] | (mixer[7+mixer[4]] << 8); + bmapsize = (nroutch * chidx[mixer[4]] + 7) >> 3; + bmap += bmapsize - 1; + if (mixer[0] < 10+mixer[4]+bmapsize) { + printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor (bitmap too small)\n", mixer[3]); + return; + } + for (i = 0; i < mixer[4]; i++) { + state->termtype = termt[i]; + if (chidx[i+1]-chidx[i] >= 2) { + flg |= MIXFLG_STEREOIN; + if (checkmixbmap(bmap, flg, chidx[i], nroutch)) { + ch = getmixchannel(state, getvolchannel(state)); + if (ch) { + ch->unitid = mixer[3]; + ch->selector = 0; + ch->chnum = chidx[i]+1; + ch->flags = flg; + prepmixch(state); + } + continue; + } + } + flg &= ~MIXFLG_STEREOIN; + if (checkmixbmap(bmap, flg, chidx[i], nroutch)) { + ch = getmixchannel(state, getvolchannel(state)); + if (ch) { + ch->unitid = mixer[3]; + ch->selector = 0; + ch->chnum = chidx[i]+1; + ch->flags = flg; + prepmixch(state); + } + } + } + state->termtype = 0; +} + +static struct mixerchannel *slctsrc_findunit(struct consmixstate *state, __u8 unitid) +{ + unsigned int i; + + for (i = 0; i < state->nrmixch; i++) + if (state->mixch[i].unitid == unitid) + return &state->mixch[i]; + return NULL; +} + +static void usb_audio_selectorunit(struct consmixstate *state, unsigned char *selector) +{ + unsigned int chnum, i, mixch; + struct mixerchannel *mch; + + if (!selector[4]) { + printk(KERN_ERR "usbaudio: unit %u invalid SELECTOR_UNIT descriptor\n", selector[3]); + return; + } + mixch = state->nrmixch; + usb_audio_recurseunit(state, selector[5]); + if (state->nrmixch != mixch) { + mch = &state->mixch[state->nrmixch-1]; + mch->slctunitid = selector[3] | (1 << 8); + } else if ((mch = slctsrc_findunit(state, selector[5]))) { + mch->slctunitid = selector[3] | (1 << 8); + } else { + printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel 1\n", selector[3]); + } + chnum = state->nrchannels; + for (i = 1; i < selector[4]; i++) { + mixch = state->nrmixch; + usb_audio_recurseunit(state, selector[5+i]); + if (chnum != state->nrchannels) { + printk(KERN_ERR "usbaudio: selector unit %u: input pins with varying channel numbers\n", selector[3]); + state->termtype = 0; + state->chconfig = 0; + state->nrchannels = 0; + return; + } + if (state->nrmixch != mixch) { + mch = &state->mixch[state->nrmixch-1]; + mch->slctunitid = selector[3] | ((i + 1) << 8); + } else if ((mch = slctsrc_findunit(state, selector[5+i]))) { + mch->slctunitid = selector[3] | ((i + 1) << 8); + } else { + printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel %u\n", selector[3], i+1); + } + } + state->termtype = 0; + state->chconfig = 0; +} + +/* in the future we might try to handle 3D etc. effect units */ + +static void usb_audio_processingunit(struct consmixstate *state, unsigned char *proc) +{ + unsigned int i; + + for (i = 0; i < proc[6]; i++) + usb_audio_recurseunit(state, proc[7+i]); + state->nrchannels = proc[7+proc[6]]; + state->termtype = 0; + state->chconfig = proc[8+proc[6]] | (proc[9+proc[6]] << 8); +} + + +/* See Audio Class Spec, section 4.3.2.5 */ +static void usb_audio_featureunit(struct consmixstate *state, unsigned char *ftr) +{ + struct mixerchannel *ch; + unsigned short chftr, mchftr; +#if 0 + struct usb_device *dev = state->s->usbdev; + unsigned char data[1]; +#endif + unsigned char nr_logical_channels, i; + + usb_audio_recurseunit(state, ftr[4]); + + if (ftr[5] == 0 ) { + printk(KERN_ERR "usbaudio: wrong controls size in feature unit %u\n",ftr[3]); + return; + } + + if (state->nrchannels == 0) { + printk(KERN_ERR "usbaudio: feature unit %u source has no channels\n", ftr[3]); + return; + } + if (state->nrchannels > 2) + printk(KERN_WARNING "usbaudio: feature unit %u: OSS mixer interface does not support more than 2 channels\n", ftr[3]); + + nr_logical_channels=(ftr[0]-7)/ftr[5]-1; + + if (nr_logical_channels != state->nrchannels) { + printk(KERN_WARNING "usbaudio: warning: found %d of %d logical channels.\n", state->nrchannels,nr_logical_channels); + + if (state->nrchannels == 1 && nr_logical_channels==0) { + printk(KERN_INFO "usbaudio: assuming the channel found is the master channel (got a Philips camera?). Should be fine.\n"); + } else if (state->nrchannels == 1 && nr_logical_channels==2) { + printk(KERN_INFO "usbaudio: assuming that a stereo channel connected directly to a mixer is missing in search (got Labtec headset?). Should be fine.\n"); + state->nrchannels=nr_logical_channels; + } else { + printk(KERN_WARNING "usbaudio: no idea what's going on..., contact linux-usb-devel@lists.sourceforge.net\n"); + } + } + + /* There is always a master channel */ + mchftr = ftr[6]; + /* Binary AND over logical channels if they exist */ + if (nr_logical_channels) { + chftr = ftr[6+ftr[5]]; + for (i = 2; i <= nr_logical_channels; i++) + chftr &= ftr[6+i*ftr[5]]; + } else { + chftr = 0; + } + + /* volume control */ + if (chftr & 2) { + ch = getmixchannel(state, getvolchannel(state)); + if (ch) { + ch->unitid = ftr[3]; + ch->selector = VOLUME_CONTROL; + ch->chnum = 1; + ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0; + prepmixch(state); + } + } else if (mchftr & 2) { + ch = getmixchannel(state, getvolchannel(state)); + if (ch) { + ch->unitid = ftr[3]; + ch->selector = VOLUME_CONTROL; + ch->chnum = 0; + ch->flags = 0; + prepmixch(state); + } + } + /* bass control */ + if (chftr & 4) { + ch = getmixchannel(state, SOUND_MIXER_BASS); + if (ch) { + ch->unitid = ftr[3]; + ch->selector = BASS_CONTROL; + ch->chnum = 1; + ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0; + prepmixch(state); + } + } else if (mchftr & 4) { + ch = getmixchannel(state, SOUND_MIXER_BASS); + if (ch) { + ch->unitid = ftr[3]; + ch->selector = BASS_CONTROL; + ch->chnum = 0; + ch->flags = 0; + prepmixch(state); + } + } + /* treble control */ + if (chftr & 16) { + ch = getmixchannel(state, SOUND_MIXER_TREBLE); + if (ch) { + ch->unitid = ftr[3]; + ch->selector = TREBLE_CONTROL; + ch->chnum = 1; + ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0; + prepmixch(state); + } + } else if (mchftr & 16) { + ch = getmixchannel(state, SOUND_MIXER_TREBLE); + if (ch) { + ch->unitid = ftr[3]; + ch->selector = TREBLE_CONTROL; + ch->chnum = 0; + ch->flags = 0; + prepmixch(state); + } + } +#if 0 + /* if there are mute controls, unmute them */ + /* does not seem to be necessary, and the Dallas chip does not seem to support the "all" channel (255) */ + if ((chftr & 1) || (mchftr & 1)) { + printk(KERN_DEBUG "usbaudio: unmuting feature unit %u interface %u\n", ftr[3], state->ctrlif); + data[0] = 0; + if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + (MUTE_CONTROL << 8) | 0xff, state->ctrlif | (ftr[3] << 8), data, 1, 1000) < 0) + printk(KERN_WARNING "usbaudio: failure to unmute feature unit %u interface %u\n", ftr[3], state->ctrlif); + } +#endif +} + +static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid) +{ + unsigned char *p1; + unsigned int i, j; + + if (test_and_set_bit(unitid, state->unitbitmap)) { + printk(KERN_INFO "usbaudio: mixer path revisits unit %d\n", unitid); + return; + } + p1 = find_audiocontrol_unit(state->buffer, state->buflen, NULL, unitid, state->ctrlif); + if (!p1) { + printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid); + return; + } + state->nrchannels = 0; + state->termtype = 0; + state->chconfig = 0; + switch (p1[2]) { + case INPUT_TERMINAL: + if (p1[0] < 12) { + printk(KERN_ERR "usbaudio: unit %u: invalid INPUT_TERMINAL descriptor\n", unitid); + return; + } + state->nrchannels = p1[7]; + state->termtype = p1[4] | (p1[5] << 8); + state->chconfig = p1[8] | (p1[9] << 8); + return; + + case MIXER_UNIT: + if (p1[0] < 10 || p1[0] < 10+p1[4]) { + printk(KERN_ERR "usbaudio: unit %u: invalid MIXER_UNIT descriptor\n", unitid); + return; + } + usb_audio_mixerunit(state, p1); + return; + + case SELECTOR_UNIT: + if (p1[0] < 6 || p1[0] < 6+p1[4]) { + printk(KERN_ERR "usbaudio: unit %u: invalid SELECTOR_UNIT descriptor\n", unitid); + return; + } + usb_audio_selectorunit(state, p1); + return; + + case FEATURE_UNIT: /* See USB Audio Class Spec 4.3.2.5 */ + if (p1[0] < 7 || p1[0] < 7+p1[5]) { + printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid); + return; + } + usb_audio_featureunit(state, p1); + return; + + case PROCESSING_UNIT: + if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) { + printk(KERN_ERR "usbaudio: unit %u: invalid PROCESSING_UNIT descriptor\n", unitid); + return; + } + usb_audio_processingunit(state, p1); + return; + + case EXTENSION_UNIT: + if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) { + printk(KERN_ERR "usbaudio: unit %u: invalid EXTENSION_UNIT descriptor\n", unitid); + return; + } + for (j = i = 0; i < p1[6]; i++) { + usb_audio_recurseunit(state, p1[7+i]); + if (!i) + j = state->termtype; + else if (j != state->termtype) + j = 0; + } + state->nrchannels = p1[7+p1[6]]; + state->chconfig = p1[8+p1[6]] | (p1[9+p1[6]] << 8); + state->termtype = j; + return; + + default: + printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]); + return; + } +} + +static void usb_audio_constructmixer(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif, unsigned char *oterm) +{ + struct usb_mixerdev *ms; + struct consmixstate state; + + memset(&state, 0, sizeof(state)); + state.s = s; + state.nrmixch = 0; + state.mixchmask = ~0; + state.buffer = buffer; + state.buflen = buflen; + state.ctrlif = ctrlif; + set_bit(oterm[3], state.unitbitmap); /* mark terminal ID as visited */ + printk(KERN_DEBUG "usbaudio: constructing mixer for Terminal %u type 0x%04x\n", + oterm[3], oterm[4] | (oterm[5] << 8)); + usb_audio_recurseunit(&state, oterm[7]); + if (!state.nrmixch) { + printk(KERN_INFO "usbaudio: no mixer controls found for Terminal %u\n", oterm[3]); + return; + } + if (!(ms = kmalloc(sizeof(struct usb_mixerdev)+state.nrmixch*sizeof(struct mixerchannel), GFP_KERNEL))) + return; + memset(ms, 0, sizeof(struct usb_mixerdev)); + memcpy(&ms->ch, &state.mixch, state.nrmixch*sizeof(struct mixerchannel)); + ms->state = s; + ms->iface = ctrlif; + ms->numch = state.nrmixch; + if ((ms->dev_mixer = register_sound_mixer(&usb_mixer_fops, -1)) < 0) { + printk(KERN_ERR "usbaudio: cannot register mixer\n"); + kfree(ms); + return; + } + printk(KERN_INFO "usbaudio: registered mixer 14,%d\n", ms->dev_mixer); + list_add_tail(&ms->list, &s->mixerlist); +} + +/* arbitrary limit, we won't check more interfaces than this */ +#define USB_MAXINTERFACES 32 + +static struct usb_audio_state *usb_audio_parsecontrol(struct usb_device *dev, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif) +{ + struct usb_audio_state *s; + struct usb_interface *iface; + struct usb_host_interface *alt; + unsigned char ifin[USB_MAXINTERFACES], ifout[USB_MAXINTERFACES]; + unsigned char *p1; + unsigned int i, j, k, numifin = 0, numifout = 0; + + if (!(s = kmalloc(sizeof(struct usb_audio_state), GFP_KERNEL))) + return NULL; + memset(s, 0, sizeof(struct usb_audio_state)); + INIT_LIST_HEAD(&s->audiolist); + INIT_LIST_HEAD(&s->mixerlist); + s->usbdev = dev; + s->count = 1; + + /* find audiocontrol interface */ + if (!(p1 = find_csinterface_descriptor(buffer, buflen, NULL, HEADER, ctrlif, -1))) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u no HEADER found\n", + dev->devnum, ctrlif); + goto ret; + } + if (p1[0] < 8 + p1[7]) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u HEADER error\n", + dev->devnum, ctrlif); + goto ret; + } + if (!p1[7]) + printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has no AudioStreaming and MidiStreaming interfaces\n", + dev->devnum, ctrlif); + for (i = 0; i < p1[7]; i++) { + j = p1[8+i]; + iface = usb_ifnum_to_if(dev, j); + if (!iface) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u does not exist\n", + dev->devnum, ctrlif, j); + continue; + } + if (iface->num_altsetting == 1) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u has only 1 altsetting.\n", dev->devnum, ctrlif); + continue; + } + alt = usb_altnum_to_altsetting(iface, 0); + if (!alt) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 0\n", + dev->devnum, ctrlif, j); + continue; + } + if (alt->desc.bInterfaceClass != USB_CLASS_AUDIO) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u is not an AudioClass interface\n", + dev->devnum, ctrlif, j); + continue; + } + if (alt->desc.bInterfaceSubClass == 3) { + printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u interface %u MIDIStreaming not supported\n", + dev->devnum, ctrlif, j); + continue; + } + if (alt->desc.bInterfaceSubClass != 2) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u invalid AudioClass subtype\n", + dev->devnum, ctrlif, j); + continue; + } + if (alt->desc.bNumEndpoints > 0) { + /* Check all endpoints; should they all have a bandwidth of 0 ? */ + for (k = 0; k < alt->desc.bNumEndpoints; k++) { + if (le16_to_cpu(alt->endpoint[k].desc.wMaxPacketSize) > 0) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u endpoint %d does not have 0 bandwidth at alt[0]\n", dev->devnum, ctrlif, k); + break; + } + } + if (k < alt->desc.bNumEndpoints) + continue; + } + + alt = usb_altnum_to_altsetting(iface, 1); + if (!alt) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 1\n", + dev->devnum, ctrlif, j); + continue; + } + if (alt->desc.bNumEndpoints < 1) { + printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no endpoint\n", + dev->devnum, ctrlif, j); + continue; + } + /* note: this requires the data endpoint to be ep0 and the optional sync + ep to be ep1, which seems to be the case */ + if (alt->endpoint[0].desc.bEndpointAddress & USB_DIR_IN) { + if (numifin < USB_MAXINTERFACES) { + ifin[numifin++] = j; + usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1); + } + } else { + if (numifout < USB_MAXINTERFACES) { + ifout[numifout++] = j; + usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1); + } + } + } + printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has %u input and %u output AudioStreaming interfaces\n", + dev->devnum, ctrlif, numifin, numifout); + for (i = 0; i < numifin && i < numifout; i++) + usb_audio_parsestreaming(s, buffer, buflen, ifin[i], ifout[i]); + for (j = i; j < numifin; j++) + usb_audio_parsestreaming(s, buffer, buflen, ifin[i], -1); + for (j = i; j < numifout; j++) + usb_audio_parsestreaming(s, buffer, buflen, -1, ifout[i]); + /* now walk through all OUTPUT_TERMINAL descriptors to search for mixers */ + p1 = find_csinterface_descriptor(buffer, buflen, NULL, OUTPUT_TERMINAL, ctrlif, -1); + while (p1) { + if (p1[0] >= 9) + usb_audio_constructmixer(s, buffer, buflen, ctrlif, p1); + p1 = find_csinterface_descriptor(buffer, buflen, p1, OUTPUT_TERMINAL, ctrlif, -1); + } + +ret: + if (list_empty(&s->audiolist) && list_empty(&s->mixerlist)) { + kfree(s); + return NULL; + } + /* everything successful */ + down(&open_sem); + list_add_tail(&s->audiodev, &audiodevs); + up(&open_sem); + printk(KERN_DEBUG "usb_audio_parsecontrol: usb_audio_state at %p\n", s); + return s; +} + +/* we only care for the currently active configuration */ + +static int usb_audio_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev (intf); + struct usb_audio_state *s; + unsigned char *buffer; + unsigned int buflen; + +#if 0 + printk(KERN_DEBUG "usbaudio: Probing if %i: IC %x, ISC %x\n", ifnum, + config->interface[ifnum].altsetting[0].desc.bInterfaceClass, + config->interface[ifnum].altsetting[0].desc.bInterfaceSubClass); +#endif + + /* + * audiocontrol interface found + * find which configuration number is active + */ + buffer = dev->rawdescriptors[dev->actconfig - dev->config]; + buflen = le16_to_cpu(dev->actconfig->desc.wTotalLength); + s = usb_audio_parsecontrol(dev, buffer, buflen, intf->altsetting->desc.bInterfaceNumber); + if (s) { + usb_set_intfdata (intf, s); + return 0; + } + return -ENODEV; +} + + +/* a revoke facility would make things simpler */ + +static void usb_audio_disconnect(struct usb_interface *intf) +{ + struct usb_audio_state *s = usb_get_intfdata (intf); + struct usb_audiodev *as; + struct usb_mixerdev *ms; + + if (!s) + return; + + /* we get called with -1 for every audiostreaming interface registered */ + if (s == (struct usb_audio_state *)-1) { + dprintk((KERN_DEBUG "usbaudio: note, usb_audio_disconnect called with -1\n")); + return; + } + if (!s->usbdev) { + dprintk((KERN_DEBUG "usbaudio: error, usb_audio_disconnect already called for %p!\n", s)); + return; + } + down(&open_sem); + list_del_init(&s->audiodev); + s->usbdev = NULL; + usb_set_intfdata (intf, NULL); + + /* deregister all audio and mixer devices, so no new processes can open this device */ + list_for_each_entry(as, &s->audiolist, list) { + usbin_disc(as); + usbout_disc(as); + wake_up(&as->usbin.dma.wait); + wake_up(&as->usbout.dma.wait); + if (as->dev_audio >= 0) { + unregister_sound_dsp(as->dev_audio); + printk(KERN_INFO "usbaudio: unregister dsp 14,%d\n", as->dev_audio); + } + as->dev_audio = -1; + } + list_for_each_entry(ms, &s->mixerlist, list) { + if (ms->dev_mixer >= 0) { + unregister_sound_mixer(ms->dev_mixer); + printk(KERN_INFO "usbaudio: unregister mixer 14,%d\n", ms->dev_mixer); + } + ms->dev_mixer = -1; + } + release(s); + wake_up(&open_wait); +} + +static int __init usb_audio_init(void) +{ + int result = usb_register(&usb_audio_driver); + if (result == 0) + info(DRIVER_VERSION ":" DRIVER_DESC); + return result; +} + + +static void __exit usb_audio_cleanup(void) +{ + usb_deregister(&usb_audio_driver); +} + +module_init(usb_audio_init); +module_exit(usb_audio_cleanup); + +MODULE_AUTHOR( DRIVER_AUTHOR ); +MODULE_DESCRIPTION( DRIVER_DESC ); +MODULE_LICENSE("GPL"); + |