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-rw-r--r--sound/usb/usx2y/usbusx2yaudio.c1033
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 0000000000..5197599e7a
--- /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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 05:38:28 +0000