diff options
Diffstat (limited to 'sound/usb/usx2y/usbusx2yaudio.c')
| -rw-r--r-- | sound/usb/usx2y/usbusx2yaudio.c | 1033 |
1 files changed, 1033 insertions, 0 deletions
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c new file mode 100644 index 000000000..5197599e7 --- /dev/null +++ b/sound/usb/usx2y/usbusx2yaudio.c @@ -0,0 +1,1033 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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) + */ + + +#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" + +/* 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 4 + +/* 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. + */ +#define USX2Y_NRPACKS_VARIABLE 1 + +#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; + int cnt, blen; + 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) { + cnt = runtime->buffer_size - hwptr_done; + 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; + hwptr_done += len; + if (hwptr_done >= 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) +{ + struct usx2ydev *usx2y = subs->usx2y; + struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; + int count, counts, pack, len; + + 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. + */ + 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; + subs->hwptr += count; + if (subs->hwptr >= 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 */ + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err < 0) { + snd_printk(KERN_ERR "usb_submit_urb() returned %i\n", err); + return err; + } + return 0; +} + +static 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 (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) { + err = usx2y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb); + if (err) + return err; + err = usx2y_urb_submit(playbacksubs, urb, frame); + if (err) + return err; + } + + playbacksubs->completed_urb = NULL; + + state = atomic_read(&capsubs->state); + if (state >= STATE_PREPARED) { + if (state == STATE_RUNNING) { + err = usx2y_urb_capt_retire(capsubs); + if (err) + return err; + } else if (state >= STATE_PRERUNNING) { + atomic_inc(&capsubs->state); + } + err = usx2y_urb_submit(capsubs, capsubs->completed_urb, frame); + if (err) + return err; + } + capsubs->completed_urb = NULL; + return 0; +} + +static void usx2y_clients_stop(struct usx2ydev *usx2y) +{ + struct snd_usx2y_substream *subs; + struct urb *urb; + int s, u; + + for (s = 0; s < 4; s++) { + 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++) { + subs = usx2y->subs[s]; + if (subs) { + if (atomic_read(&subs->state) >= STATE_PRERUNNING) + snd_pcm_stop_xrun(subs->pcm_substream); + for (u = 0; u < NRURBS; u++) { + urb = subs->urb[u]; + if (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 i_usx2y_urb_complete(struct urb *urb) +{ + struct snd_usx2y_substream *subs = urb->context; + struct usx2ydev *usx2y = subs->usx2y; + struct snd_usx2y_substream *capsubs, *playbacksubs; + + 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; + } + + subs->completed_urb = urb; + + 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 *)) +{ + struct snd_usx2y_substream *subs; + struct urb *urb; + int s, u; + + for (s = 0; s < 4; s++) { + subs = usx2y->subs[s]; + if (subs) { + for (u = 0; u < NRURBS; u++) { + urb = subs->urb[u]; + if (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 (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("%s %i\n", __func__, 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; + struct urb **purb; + + pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) : + usb_rcvisocpipe(dev, subs->endpoint); + subs->maxpacksize = usb_maxpacket(dev, pipe); + if (!subs->maxpacksize) + return -EINVAL; + + if (is_playback && !subs->tmpbuf) { /* allocate a temporary buffer for playback */ + subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL); + if (!subs->tmpbuf) + return -ENOMEM; + } + /* allocate and initialize data urbs */ + for (i = 0; i < NRURBS; i++) { + purb = subs->urb + i; + if (*purb) { + usb_kill_urb(*purb); + continue; + } + *purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL); + if (!*purb) { + usx2y_urbs_release(subs); + return -ENOMEM; + } + if (!is_playback && !(*purb)->transfer_buffer) { + /* allocate a capture buffer per urb */ + (*purb)->transfer_buffer = + kmalloc_array(subs->maxpacksize, + nr_of_packs(), GFP_KERNEL); + if (!(*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; + struct urb *urb; + unsigned long pack; + + err = usx2y_urbs_allocate(subs); + if (err < 0) + return err; + subs->completed_urb = NULL; + for (i = 0; i < 4; i++) { + struct snd_usx2y_substream *subs = usx2y->subs[i]; + + if (subs && atomic_read(&subs->state) >= STATE_PREPARED) + goto start; + } + + start: + usx2y_subs_startup(subs); + for (i = 0; i < NRURBS; i++) { + urb = subs->urb[i]; + if (usb_pipein(urb->pipe)) { + if (!i) + atomic_set(&subs->state, STATE_STARTING3); + urb->dev = usx2y->dev; + 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(); + err = usb_submit_urb(urb, GFP_ATOMIC); + if (err < 0) { + snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err); + err = -EPIPE; + goto cleanup; + } else { + if (!i) + 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, !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 wrong > stop everything + } + 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("%s(START)\n", __func__); + 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("%s(STOP)\n", __func__); + 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. + */ +struct s_c2 { + char c1, c2; +}; + +static const struct s_c2 setrate_44100[] = { + { 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 const struct s_c2 setrate_48000[] = { + { 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(setrate_48000) + +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 (!--usx2y->us04->len) + wake_up(&usx2y->in04_wait_queue); +} + +static int usx2y_rate_set(struct usx2ydev *usx2y, int rate) +{ + int err = 0, i; + struct snd_usx2y_urb_seq *us = NULL; + int *usbdata = NULL; + const struct s_c2 *ra = rate == 48000 ? setrate_48000 : setrate_44100; + struct urb *urb; + + if (usx2y->rate != rate) { + us = kzalloc(struct_size(us, urb, NOOF_SETRATE_URBS), + GFP_KERNEL); + if (!us) { + err = -ENOMEM; + goto cleanup; + } + usbdata = kmalloc_array(NOOF_SETRATE_URBS, sizeof(int), + GFP_KERNEL); + if (!usbdata) { + err = -ENOMEM; + goto cleanup; + } + for (i = 0; i < NOOF_SETRATE_URBS; ++i) { + us->urb[i] = usb_alloc_urb(0, GFP_KERNEL); + if (!us->urb[i]) { + 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); + } + err = usb_urb_ep_type_check(us->urb[0]); + if (err < 0) + goto cleanup; + us->submitted = 0; + us->len = NOOF_SETRATE_URBS; + usx2y->us04 = us; + wait_event_timeout(usx2y->in04_wait_queue, !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) { + urb = us->urb[i]; + if (!urb) + continue; + 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->in04_urb); + err = usb_set_interface(usx2y->dev, 0, alternate); + if (err) { + snd_printk(KERN_ERR "usb_set_interface error\n"); + return err; + } + usx2y->in04_urb->dev = usx2y->dev; + err = usb_submit_urb(usx2y->in04_urb, 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 usx2ydev *dev = usx2y(card); + struct snd_usx2y_substream *subs; + struct snd_pcm_substream *test_substream; + int i; + + mutex_lock(&usx2y(card)->pcm_mutex); + 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 + */ + for (i = 0; i < dev->pcm_devs * 2; i++) { + subs = dev->subs[i]; + if (!subs) + continue; + test_substream = subs->pcm_substream; + if (!test_substream || test_substream == substream || + !test_substream->runtime) + continue; + if ((test_substream->runtime->format && + test_substream->runtime->format != format) || + (test_substream->runtime->rate && + test_substream->runtime->rate != rate)) { + err = -EINVAL; + goto error; + } + } + + error: + mutex_unlock(&usx2y(card)->pcm_mutex); + return err; +} + +/* + * 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; + struct snd_usx2y_substream *cap_subs, *playback_subs; + + mutex_lock(&subs->usx2y->pcm_mutex); + snd_printdd("snd_usx2y_hw_free(%p)\n", substream); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + 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->state < SNDRV_PCM_STATE_PREPARED) { + atomic_set(&cap_subs->state, STATE_STOPPED); + usx2y_urbs_release(cap_subs); + } + } else { + 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->pcm_mutex); + return 0; +} + +/* + * 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("%s(%p)\n", __func__, substream); + + mutex_lock(&usx2y->pcm_mutex); + usx2y_subs_prepare(subs); + // Start hardware streams + // SyncStream first.... + if (atomic_read(&capsubs->state) < STATE_PREPARED) { + if (usx2y->format != runtime->format) { + err = usx2y_format_set(usx2y, runtime->format); + if (err < 0) + goto up_prepare_mutex; + } + if (usx2y->rate != runtime->rate) { + err = usx2y_rate_set(usx2y, runtime->rate); + if (err < 0) + goto up_prepare_mutex; + } + snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe"); + err = usx2y_urbs_start(capsubs); + if (err < 0) + goto up_prepare_mutex; + } + + if (subs != capsubs && atomic_read(&subs->state) < STATE_PREPARED) + err = usx2y_urbs_start(subs); + + up_prepare_mutex: + mutex_unlock(&usx2y->pcm_mutex); + return err; +} + +static const 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 const struct snd_pcm_ops snd_usx2y_pcm_ops = { + .open = snd_usx2y_pcm_open, + .close = snd_usx2y_pcm_close, + .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) +{ + int stream; + + for_each_pcm_streams(stream) { + kfree(usx2y_substream[stream]); + usx2y_substream[stream] = 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 (!usx2y_substream[i]) + 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) { + snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream, + SNDRV_DMA_TYPE_CONTINUOUS, + NULL, + 64*1024, 128*1024); + } + + snd_pcm_set_managed_buffer(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream, + SNDRV_DMA_TYPE_CONTINUOUS, + NULL, + 64*1024, 128*1024); + usx2y(card)->pcm_devs++; + + return 0; +} + +/* + * create a chip instance and set its names. + */ +int usx2y_audio_create(struct snd_card *card) +{ + int err; + + err = usx2y_audio_stream_new(card, 0xA, 0x8); + if (err < 0) + return err; + if (le16_to_cpu(usx2y(card)->dev->descriptor.idProduct) == USB_ID_US428) { + err = usx2y_audio_stream_new(card, 0, 0xA); + if (err < 0) + 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; +} |