/* * US-X2Y AUDIO * Copyright (c) 2002-2004 by Karsten Wiese * * based on * * (Tentative) USB Audio Driver for ALSA * * Main and PCM part * * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> * * Many codes borrowed from audio.c by * Alan Cox (alan@lxorguk.ukuu.org.uk) * Thomas Sailer (sailer@ife.ee.ethz.ch) * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/usb.h> #include <linux/moduleparam.h> #include <sound/core.h> #include <sound/info.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include "usx2y.h" #include "usbusx2y.h" #define USX2Y_NRPACKS 4 /* Default value used for nr of packs per urb. 1 to 4 have been tested ok on uhci. To use 3 on ohci, you'd need a patch: look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425" . 1, 2 and 4 work out of the box on ohci, if I recall correctly. Bigger is safer operation, smaller gives lower latencies. */ #define USX2Y_NRPACKS_VARIABLE y /* If your system works ok with this module's parameter nrpacks set to 1, you might as well comment this #define out, and thereby produce smaller, faster code. You'd also set USX2Y_NRPACKS to 1 then. */ #ifdef USX2Y_NRPACKS_VARIABLE static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */ #define nr_of_packs() nrpacks module_param(nrpacks, int, 0444); MODULE_PARM_DESC(nrpacks, "Number of packets per URB."); #else #define nr_of_packs() USX2Y_NRPACKS #endif static int usX2Y_urb_capt_retire(struct snd_usX2Y_substream *subs) { struct urb *urb = subs->completed_urb; struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; unsigned char *cp; int i, len, lens = 0, hwptr_done = subs->hwptr_done; struct usX2Ydev *usX2Y = subs->usX2Y; for (i = 0; i < nr_of_packs(); i++) { cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset; if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */ snd_printk(KERN_ERR "active frame status %i. " "Most probably some hardware problem.\n", urb->iso_frame_desc[i].status); return urb->iso_frame_desc[i].status; } len = urb->iso_frame_desc[i].actual_length / usX2Y->stride; if (! len) { snd_printd("0 == len ERROR!\n"); continue; } /* copy a data chunk */ if ((hwptr_done + len) > runtime->buffer_size) { int cnt = runtime->buffer_size - hwptr_done; int blen = cnt * usX2Y->stride; memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen); memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen); } else { memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, len * usX2Y->stride); } lens += len; if ((hwptr_done += len) >= runtime->buffer_size) hwptr_done -= runtime->buffer_size; } subs->hwptr_done = hwptr_done; subs->transfer_done += lens; /* update the pointer, call callback if necessary */ if (subs->transfer_done >= runtime->period_size) { subs->transfer_done -= runtime->period_size; snd_pcm_period_elapsed(subs->pcm_substream); } return 0; } /* * prepare urb for playback data pipe * * we copy the data directly from the pcm buffer. * the current position to be copied is held in hwptr field. * since a urb can handle only a single linear buffer, if the total * transferred area overflows the buffer boundary, we cannot send * it directly from the buffer. thus the data is once copied to * a temporary buffer and urb points to that. */ static int usX2Y_urb_play_prepare(struct snd_usX2Y_substream *subs, struct urb *cap_urb, struct urb *urb) { int count, counts, pack; struct usX2Ydev *usX2Y = subs->usX2Y; struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; count = 0; for (pack = 0; pack < nr_of_packs(); pack++) { /* calculate the size of a packet */ counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride; count += counts; if (counts < 43 || counts > 50) { snd_printk(KERN_ERR "should not be here with counts=%i\n", counts); return -EPIPE; } /* set up descriptor */ urb->iso_frame_desc[pack].offset = pack ? urb->iso_frame_desc[pack - 1].offset + urb->iso_frame_desc[pack - 1].length : 0; urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length; } if (atomic_read(&subs->state) >= state_PRERUNNING) if (subs->hwptr + count > runtime->buffer_size) { /* err, the transferred area goes over buffer boundary. * copy the data to the temp buffer. */ int len; len = runtime->buffer_size - subs->hwptr; urb->transfer_buffer = subs->tmpbuf; memcpy(subs->tmpbuf, runtime->dma_area + subs->hwptr * usX2Y->stride, len * usX2Y->stride); memcpy(subs->tmpbuf + len * usX2Y->stride, runtime->dma_area, (count - len) * usX2Y->stride); subs->hwptr += count; subs->hwptr -= runtime->buffer_size; } else { /* set the buffer pointer */ urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride; if ((subs->hwptr += count) >= runtime->buffer_size) subs->hwptr -= runtime->buffer_size; } else urb->transfer_buffer = subs->tmpbuf; urb->transfer_buffer_length = count * usX2Y->stride; return 0; } /* * process after playback data complete * * update the current position and call callback if a period is processed. */ static void usX2Y_urb_play_retire(struct snd_usX2Y_substream *subs, struct urb *urb) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; int len = urb->actual_length / subs->usX2Y->stride; subs->transfer_done += len; subs->hwptr_done += len; if (subs->hwptr_done >= runtime->buffer_size) subs->hwptr_done -= runtime->buffer_size; if (subs->transfer_done >= runtime->period_size) { subs->transfer_done -= runtime->period_size; snd_pcm_period_elapsed(subs->pcm_substream); } } static int usX2Y_urb_submit(struct snd_usX2Y_substream *subs, struct urb *urb, int frame) { int err; if (!urb) return -ENODEV; urb->start_frame = (frame + NRURBS * nr_of_packs()); // let hcd do rollover sanity checks urb->hcpriv = NULL; urb->dev = subs->usX2Y->dev; /* we need to set this at each time */ if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err); return err; } return 0; } static inline int usX2Y_usbframe_complete(struct snd_usX2Y_substream *capsubs, struct snd_usX2Y_substream *playbacksubs, int frame) { int err, state; struct urb *urb = playbacksubs->completed_urb; state = atomic_read(&playbacksubs->state); if (NULL != urb) { if (state == state_RUNNING) usX2Y_urb_play_retire(playbacksubs, urb); else if (state >= state_PRERUNNING) atomic_inc(&playbacksubs->state); } else { switch (state) { case state_STARTING1: urb = playbacksubs->urb[0]; atomic_inc(&playbacksubs->state); break; case state_STARTING2: urb = playbacksubs->urb[1]; atomic_inc(&playbacksubs->state); break; } } if (urb) { if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) || (err = usX2Y_urb_submit(playbacksubs, urb, frame))) { return err; } } playbacksubs->completed_urb = NULL; state = atomic_read(&capsubs->state); if (state >= state_PREPARED) { if (state == state_RUNNING) { if ((err = usX2Y_urb_capt_retire(capsubs))) return err; } else if (state >= state_PRERUNNING) atomic_inc(&capsubs->state); if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame))) return err; } capsubs->completed_urb = NULL; return 0; } static void usX2Y_clients_stop(struct usX2Ydev *usX2Y) { int s, u; for (s = 0; s < 4; s++) { struct snd_usX2Y_substream *subs = usX2Y->subs[s]; if (subs) { snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state)); atomic_set(&subs->state, state_STOPPED); } } for (s = 0; s < 4; s++) { struct snd_usX2Y_substream *subs = usX2Y->subs[s]; if (subs) { if (atomic_read(&subs->state) >= state_PRERUNNING) { snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN); } for (u = 0; u < NRURBS; u++) { struct urb *urb = subs->urb[u]; if (NULL != urb) snd_printdd("%i status=%i start_frame=%i\n", u, urb->status, urb->start_frame); } } } usX2Y->prepare_subs = NULL; wake_up(&usX2Y->prepare_wait_queue); } static void usX2Y_error_urb_status(struct usX2Ydev *usX2Y, struct snd_usX2Y_substream *subs, struct urb *urb) { snd_printk(KERN_ERR "ep=%i stalled with status=%i\n", subs->endpoint, urb->status); urb->status = 0; usX2Y_clients_stop(usX2Y); } static void usX2Y_error_sequence(struct usX2Ydev *usX2Y, struct snd_usX2Y_substream *subs, struct urb *urb) { snd_printk(KERN_ERR "Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n" "Most probably some urb of usb-frame %i is still missing.\n" "Cause could be too long delays in usb-hcd interrupt handling.\n", usb_get_current_frame_number(usX2Y->dev), subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", usX2Y->wait_iso_frame, urb->start_frame, usX2Y->wait_iso_frame); usX2Y_clients_stop(usX2Y); } static void i_usX2Y_urb_complete(struct urb *urb) { struct snd_usX2Y_substream *subs = urb->context; struct usX2Ydev *usX2Y = subs->usX2Y; if (unlikely(atomic_read(&subs->state) < state_PREPARED)) { snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", usb_get_current_frame_number(usX2Y->dev), subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", urb->status, urb->start_frame); return; } if (unlikely(urb->status)) { usX2Y_error_urb_status(usX2Y, subs, urb); return; } if (likely((urb->start_frame & 0xFFFF) == (usX2Y->wait_iso_frame & 0xFFFF))) subs->completed_urb = urb; else { usX2Y_error_sequence(usX2Y, subs, urb); return; } { struct snd_usX2Y_substream *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE], *playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED && (playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) { if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame)) usX2Y->wait_iso_frame += nr_of_packs(); else { snd_printdd("\n"); usX2Y_clients_stop(usX2Y); } } } } static void usX2Y_urbs_set_complete(struct usX2Ydev * usX2Y, void (*complete)(struct urb *)) { int s, u; for (s = 0; s < 4; s++) { struct snd_usX2Y_substream *subs = usX2Y->subs[s]; if (NULL != subs) for (u = 0; u < NRURBS; u++) { struct urb * urb = subs->urb[u]; if (NULL != urb) urb->complete = complete; } } } static void usX2Y_subs_startup_finish(struct usX2Ydev * usX2Y) { usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete); usX2Y->prepare_subs = NULL; } static void i_usX2Y_subs_startup(struct urb *urb) { struct snd_usX2Y_substream *subs = urb->context; struct usX2Ydev *usX2Y = subs->usX2Y; struct snd_usX2Y_substream *prepare_subs = usX2Y->prepare_subs; if (NULL != prepare_subs) if (urb->start_frame == prepare_subs->urb[0]->start_frame) { usX2Y_subs_startup_finish(usX2Y); atomic_inc(&prepare_subs->state); wake_up(&usX2Y->prepare_wait_queue); } i_usX2Y_urb_complete(urb); } static void usX2Y_subs_prepare(struct snd_usX2Y_substream *subs) { snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n", subs, subs->endpoint, subs->urb[0], subs->urb[1]); /* reset the pointer */ subs->hwptr = 0; subs->hwptr_done = 0; subs->transfer_done = 0; } static void usX2Y_urb_release(struct urb **urb, int free_tb) { if (*urb) { usb_kill_urb(*urb); if (free_tb) kfree((*urb)->transfer_buffer); usb_free_urb(*urb); *urb = NULL; } } /* * release a substreams urbs */ static void usX2Y_urbs_release(struct snd_usX2Y_substream *subs) { int i; snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint); for (i = 0; i < NRURBS; i++) usX2Y_urb_release(subs->urb + i, subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]); kfree(subs->tmpbuf); subs->tmpbuf = NULL; } /* * initialize a substream's urbs */ static int usX2Y_urbs_allocate(struct snd_usX2Y_substream *subs) { int i; unsigned int pipe; int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; struct usb_device *dev = subs->usX2Y->dev; pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) : usb_rcvisocpipe(dev, subs->endpoint); subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback); if (!subs->maxpacksize) return -EINVAL; if (is_playback && NULL == subs->tmpbuf) { /* allocate a temporary buffer for playback */ subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL); if (NULL == subs->tmpbuf) { snd_printk(KERN_ERR "cannot malloc tmpbuf\n"); return -ENOMEM; } } /* allocate and initialize data urbs */ for (i = 0; i < NRURBS; i++) { struct urb **purb = subs->urb + i; if (*purb) { usb_kill_urb(*purb); continue; } *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL); if (NULL == *purb) { usX2Y_urbs_release(subs); return -ENOMEM; } if (!is_playback && !(*purb)->transfer_buffer) { /* allocate a capture buffer per urb */ (*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL); if (NULL == (*purb)->transfer_buffer) { usX2Y_urbs_release(subs); return -ENOMEM; } } (*purb)->dev = dev; (*purb)->pipe = pipe; (*purb)->number_of_packets = nr_of_packs(); (*purb)->context = subs; (*purb)->interval = 1; (*purb)->complete = i_usX2Y_subs_startup; } return 0; } static void usX2Y_subs_startup(struct snd_usX2Y_substream *subs) { struct usX2Ydev *usX2Y = subs->usX2Y; usX2Y->prepare_subs = subs; subs->urb[0]->start_frame = -1; wmb(); usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup); } static int usX2Y_urbs_start(struct snd_usX2Y_substream *subs) { int i, err; struct usX2Ydev *usX2Y = subs->usX2Y; if ((err = usX2Y_urbs_allocate(subs)) < 0) return err; subs->completed_urb = NULL; for (i = 0; i < 4; i++) { struct snd_usX2Y_substream *subs = usX2Y->subs[i]; if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED) goto start; } start: usX2Y_subs_startup(subs); for (i = 0; i < NRURBS; i++) { struct urb *urb = subs->urb[i]; if (usb_pipein(urb->pipe)) { unsigned long pack; if (0 == i) atomic_set(&subs->state, state_STARTING3); urb->dev = usX2Y->dev; urb->transfer_flags = URB_ISO_ASAP; for (pack = 0; pack < nr_of_packs(); pack++) { urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack; urb->iso_frame_desc[pack].length = subs->maxpacksize; } urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err); err = -EPIPE; goto cleanup; } else if (i == 0) usX2Y->wait_iso_frame = urb->start_frame; urb->transfer_flags = 0; } else { atomic_set(&subs->state, state_STARTING1); break; } } err = 0; wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs); if (atomic_read(&subs->state) != state_PREPARED) err = -EPIPE; cleanup: if (err) { usX2Y_subs_startup_finish(usX2Y); usX2Y_clients_stop(usX2Y); // something is completely wroong > stop evrything } return err; } /* * return the current pcm pointer. just return the hwptr_done value. */ static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(struct snd_pcm_substream *substream) { struct snd_usX2Y_substream *subs = substream->runtime->private_data; return subs->hwptr_done; } /* * start/stop substream */ static int snd_usX2Y_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_usX2Y_substream *subs = substream->runtime->private_data; switch (cmd) { case SNDRV_PCM_TRIGGER_START: snd_printdd("snd_usX2Y_pcm_trigger(START)\n"); if (atomic_read(&subs->state) == state_PREPARED && atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) { atomic_set(&subs->state, state_PRERUNNING); } else { snd_printdd("\n"); return -EPIPE; } break; case SNDRV_PCM_TRIGGER_STOP: snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n"); if (atomic_read(&subs->state) >= state_PRERUNNING) atomic_set(&subs->state, state_PREPARED); break; default: return -EINVAL; } return 0; } /* * allocate a buffer, setup samplerate * * so far we use a physically linear buffer although packetize transfer * doesn't need a continuous area. * if sg buffer is supported on the later version of alsa, we'll follow * that. */ static struct s_c2 { char c1, c2; } SetRate44100[] = { { 0x14, 0x08}, // this line sets 44100, well actually a little less { 0x18, 0x40}, // only tascam / frontier design knows the further lines ....... { 0x18, 0x42}, { 0x18, 0x45}, { 0x18, 0x46}, { 0x18, 0x48}, { 0x18, 0x4A}, { 0x18, 0x4C}, { 0x18, 0x4E}, { 0x18, 0x50}, { 0x18, 0x52}, { 0x18, 0x54}, { 0x18, 0x56}, { 0x18, 0x58}, { 0x18, 0x5A}, { 0x18, 0x5C}, { 0x18, 0x5E}, { 0x18, 0x60}, { 0x18, 0x62}, { 0x18, 0x64}, { 0x18, 0x66}, { 0x18, 0x68}, { 0x18, 0x6A}, { 0x18, 0x6C}, { 0x18, 0x6E}, { 0x18, 0x70}, { 0x18, 0x72}, { 0x18, 0x74}, { 0x18, 0x76}, { 0x18, 0x78}, { 0x18, 0x7A}, { 0x18, 0x7C}, { 0x18, 0x7E} }; static struct s_c2 SetRate48000[] = { { 0x14, 0x09}, // this line sets 48000, well actually a little less { 0x18, 0x40}, // only tascam / frontier design knows the further lines ....... { 0x18, 0x42}, { 0x18, 0x45}, { 0x18, 0x46}, { 0x18, 0x48}, { 0x18, 0x4A}, { 0x18, 0x4C}, { 0x18, 0x4E}, { 0x18, 0x50}, { 0x18, 0x52}, { 0x18, 0x54}, { 0x18, 0x56}, { 0x18, 0x58}, { 0x18, 0x5A}, { 0x18, 0x5C}, { 0x18, 0x5E}, { 0x18, 0x60}, { 0x18, 0x62}, { 0x18, 0x64}, { 0x18, 0x66}, { 0x18, 0x68}, { 0x18, 0x6A}, { 0x18, 0x6C}, { 0x18, 0x6E}, { 0x18, 0x70}, { 0x18, 0x73}, { 0x18, 0x74}, { 0x18, 0x76}, { 0x18, 0x78}, { 0x18, 0x7A}, { 0x18, 0x7C}, { 0x18, 0x7E} }; #define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000) static void i_usX2Y_04Int(struct urb *urb) { struct usX2Ydev *usX2Y = urb->context; if (urb->status) snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status); if (0 == --usX2Y->US04->len) wake_up(&usX2Y->In04WaitQueue); } static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate) { int err = 0, i; struct snd_usX2Y_urbSeq *us = NULL; int *usbdata = NULL; struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100; if (usX2Y->rate != rate) { us = kzalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL); if (NULL == us) { err = -ENOMEM; goto cleanup; } usbdata = kmalloc(sizeof(int) * NOOF_SETRATE_URBS, GFP_KERNEL); if (NULL == usbdata) { err = -ENOMEM; goto cleanup; } for (i = 0; i < NOOF_SETRATE_URBS; ++i) { if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) { err = -ENOMEM; goto cleanup; } ((char*)(usbdata + i))[0] = ra[i].c1; ((char*)(usbdata + i))[1] = ra[i].c2; usb_fill_bulk_urb(us->urb[i], usX2Y->dev, usb_sndbulkpipe(usX2Y->dev, 4), usbdata + i, 2, i_usX2Y_04Int, usX2Y); #ifdef OLD_USB us->urb[i]->transfer_flags = USB_QUEUE_BULK; #endif } us->submitted = 0; us->len = NOOF_SETRATE_URBS; usX2Y->US04 = us; wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ); usX2Y->US04 = NULL; if (us->len) err = -ENODEV; cleanup: if (us) { us->submitted = 2*NOOF_SETRATE_URBS; for (i = 0; i < NOOF_SETRATE_URBS; ++i) { struct urb *urb = us->urb[i]; if (urb->status) { if (!err) err = -ENODEV; usb_kill_urb(urb); } usb_free_urb(urb); } usX2Y->US04 = NULL; kfree(usbdata); kfree(us); if (!err) usX2Y->rate = rate; } } return err; } static int usX2Y_format_set(struct usX2Ydev *usX2Y, snd_pcm_format_t format) { int alternate, err; struct list_head* p; if (format == SNDRV_PCM_FORMAT_S24_3LE) { alternate = 2; usX2Y->stride = 6; } else { alternate = 1; usX2Y->stride = 4; } list_for_each(p, &usX2Y->midi_list) { snd_usbmidi_input_stop(p); } usb_kill_urb(usX2Y->In04urb); if ((err = usb_set_interface(usX2Y->dev, 0, alternate))) { snd_printk(KERN_ERR "usb_set_interface error \n"); return err; } usX2Y->In04urb->dev = usX2Y->dev; err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL); list_for_each(p, &usX2Y->midi_list) { snd_usbmidi_input_start(p); } usX2Y->format = format; usX2Y->rate = 0; return err; } static int snd_usX2Y_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { int err = 0; unsigned int rate = params_rate(hw_params); snd_pcm_format_t format = params_format(hw_params); struct snd_card *card = substream->pstr->pcm->card; struct list_head *list; snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params); // all pcm substreams off one usX2Y have to operate at the same rate & format list_for_each(list, &card->devices) { struct snd_device *dev; struct snd_pcm *pcm; int s; dev = snd_device(list); if (dev->type != SNDRV_DEV_PCM) continue; pcm = dev->device_data; for (s = 0; s < 2; ++s) { struct snd_pcm_substream *test_substream; test_substream = pcm->streams[s].substream; if (test_substream && test_substream != substream && test_substream->runtime && ((test_substream->runtime->format && test_substream->runtime->format != format) || (test_substream->runtime->rate && test_substream->runtime->rate != rate))) return -EINVAL; } } if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) { snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n", substream, params_buffer_bytes(hw_params), err); return err; } return 0; } /* * free the buffer */ static int snd_usX2Y_pcm_hw_free(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usX2Y_substream *subs = runtime->private_data; mutex_lock(&subs->usX2Y->prepare_mutex); snd_printdd("snd_usX2Y_hw_free(%p)\n", substream); if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) { struct snd_usX2Y_substream *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; atomic_set(&subs->state, state_STOPPED); usX2Y_urbs_release(subs); if (!cap_subs->pcm_substream || !cap_subs->pcm_substream->runtime || !cap_subs->pcm_substream->runtime->status || cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) { atomic_set(&cap_subs->state, state_STOPPED); usX2Y_urbs_release(cap_subs); } } else { struct snd_usX2Y_substream *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]; if (atomic_read(&playback_subs->state) < state_PREPARED) { atomic_set(&subs->state, state_STOPPED); usX2Y_urbs_release(subs); } } mutex_unlock(&subs->usX2Y->prepare_mutex); return snd_pcm_lib_free_pages(substream); } /* * prepare callback * * set format and initialize urbs */ static int snd_usX2Y_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usX2Y_substream *subs = runtime->private_data; struct usX2Ydev *usX2Y = subs->usX2Y; struct snd_usX2Y_substream *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]; int err = 0; snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream); mutex_lock(&usX2Y->prepare_mutex); usX2Y_subs_prepare(subs); // Start hardware streams // SyncStream first.... if (atomic_read(&capsubs->state) < state_PREPARED) { if (usX2Y->format != runtime->format) if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0) goto up_prepare_mutex; if (usX2Y->rate != runtime->rate) if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0) goto up_prepare_mutex; snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe"); if (0 > (err = usX2Y_urbs_start(capsubs))) goto up_prepare_mutex; } if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED) err = usX2Y_urbs_start(subs); up_prepare_mutex: mutex_unlock(&usX2Y->prepare_mutex); return err; } static struct snd_pcm_hardware snd_usX2Y_2c = { .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH), .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE, .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, .rate_min = 44100, .rate_max = 48000, .channels_min = 2, .channels_max = 2, .buffer_bytes_max = (2*128*1024), .period_bytes_min = 64, .period_bytes_max = (128*1024), .periods_min = 2, .periods_max = 1024, .fifo_size = 0 }; static int snd_usX2Y_pcm_open(struct snd_pcm_substream *substream) { struct snd_usX2Y_substream *subs = ((struct snd_usX2Y_substream **) snd_pcm_substream_chip(substream))[substream->stream]; struct snd_pcm_runtime *runtime = substream->runtime; if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS) return -EBUSY; runtime->hw = snd_usX2Y_2c; runtime->private_data = subs; subs->pcm_substream = substream; snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000); return 0; } static int snd_usX2Y_pcm_close(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usX2Y_substream *subs = runtime->private_data; subs->pcm_substream = NULL; return 0; } static struct snd_pcm_ops snd_usX2Y_pcm_ops = { .open = snd_usX2Y_pcm_open, .close = snd_usX2Y_pcm_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_usX2Y_pcm_hw_params, .hw_free = snd_usX2Y_pcm_hw_free, .prepare = snd_usX2Y_pcm_prepare, .trigger = snd_usX2Y_pcm_trigger, .pointer = snd_usX2Y_pcm_pointer, }; /* * free a usb stream instance */ static void usX2Y_audio_stream_free(struct snd_usX2Y_substream **usX2Y_substream) { kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]); usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL; kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]); usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL; } static void snd_usX2Y_pcm_private_free(struct snd_pcm *pcm) { struct snd_usX2Y_substream **usX2Y_stream = pcm->private_data; if (usX2Y_stream) usX2Y_audio_stream_free(usX2Y_stream); } static int usX2Y_audio_stream_new(struct snd_card *card, int playback_endpoint, int capture_endpoint) { struct snd_pcm *pcm; int err, i; struct snd_usX2Y_substream **usX2Y_substream = usX2Y(card)->subs + 2 * usX2Y(card)->pcm_devs; for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE; i <= SNDRV_PCM_STREAM_CAPTURE; ++i) { usX2Y_substream[i] = kzalloc(sizeof(struct snd_usX2Y_substream), GFP_KERNEL); if (NULL == usX2Y_substream[i]) { snd_printk(KERN_ERR "cannot malloc\n"); return -ENOMEM; } usX2Y_substream[i]->usX2Y = usX2Y(card); } if (playback_endpoint) usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint; usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint; err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->pcm_devs, playback_endpoint ? 1 : 0, 1, &pcm); if (err < 0) { usX2Y_audio_stream_free(usX2Y_substream); return err; } if (playback_endpoint) snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops); pcm->private_data = usX2Y_substream; pcm->private_free = snd_usX2Y_pcm_private_free; pcm->info_flags = 0; sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->pcm_devs); if ((playback_endpoint && 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream, SNDRV_DMA_TYPE_CONTINUOUS, snd_dma_continuous_data(GFP_KERNEL), 64*1024, 128*1024))) || 0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream, SNDRV_DMA_TYPE_CONTINUOUS, snd_dma_continuous_data(GFP_KERNEL), 64*1024, 128*1024))) { snd_usX2Y_pcm_private_free(pcm); return err; } usX2Y(card)->pcm_devs++; return 0; } /* * create a chip instance and set its names. */ int usX2Y_audio_create(struct snd_card *card) { int err = 0; INIT_LIST_HEAD(&usX2Y(card)->pcm_list); if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8))) return err; if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) == USB_ID_US428) if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA))) return err; if (le16_to_cpu(usX2Y(card)->dev->descriptor.idProduct) != USB_ID_US122) err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122. return err; }