Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
new file mode 100644
index 0000000..4c292e0
--- /dev/null
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -0,0 +1,1026 @@
+/*
+ * 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 <sound/driver.h>
+#include <linux/interrupt.h>
+#include <linux/usb.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(snd_usX2Y_substream_t *subs)
+{
+ struct urb *urb = subs->completed_urb;
+ snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
+ unsigned char *cp;
+ int i, len, lens = 0, hwptr_done = subs->hwptr_done;
+ usX2Ydev_t *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("activ frame status %i. Most propably 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(snd_usX2Y_substream_t *subs,
+ struct urb *cap_urb,
+ struct urb *urb)
+{
+ int count, counts, pack;
+ usX2Ydev_t* usX2Y = subs->usX2Y;
+ snd_pcm_runtime_t *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("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(snd_usX2Y_substream_t *subs, struct urb *urb)
+{
+ snd_pcm_runtime_t *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(snd_usX2Y_substream_t *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->chip.dev; /* we need to set this at each time */
+ if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
+ snd_printk("usb_submit_urb() returned %i\n", err);
+ return err;
+ }
+ return 0;
+}
+
+static inline int usX2Y_usbframe_complete(snd_usX2Y_substream_t *capsubs, snd_usX2Y_substream_t *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(usX2Ydev_t *usX2Y)
+{
+ int s, u;
+ for (s = 0; s < 4; s++) {
+ snd_usX2Y_substream_t *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++) {
+ snd_usX2Y_substream_t *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(usX2Ydev_t *usX2Y, snd_usX2Y_substream_t *subs, struct urb *urb)
+{
+ snd_printk("ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
+ urb->status = 0;
+ usX2Y_clients_stop(usX2Y);
+}
+
+static void usX2Y_error_sequence(usX2Ydev_t *usX2Y, snd_usX2Y_substream_t *subs, struct urb *urb)
+{
+ snd_printk("Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n"
+ "Most propably 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->chip.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 pt_regs *regs)
+{
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
+ usX2Ydev_t *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->chip.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((0xFFFF & urb->start_frame) == usX2Y->wait_iso_frame))
+ subs->completed_urb = urb;
+ else {
+ usX2Y_error_sequence(usX2Y, subs, urb);
+ return;
+ }
+ {
+ snd_usX2Y_substream_t *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)) {
+ if (nr_of_packs() <= urb->start_frame &&
+ urb->start_frame <= (2 * nr_of_packs() - 1)) // uhci and ohci
+ usX2Y->wait_iso_frame = urb->start_frame - nr_of_packs();
+ else
+ usX2Y->wait_iso_frame += nr_of_packs();
+ } else {
+ snd_printdd("\n");
+ usX2Y_clients_stop(usX2Y);
+ }
+ }
+ }
+}
+
+static void usX2Y_urbs_set_complete(usX2Ydev_t * usX2Y, void (*complete)(struct urb *, struct pt_regs *))
+{
+ int s, u;
+ for (s = 0; s < 4; s++) {
+ snd_usX2Y_substream_t *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(usX2Ydev_t * usX2Y)
+{
+ usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
+ usX2Y->prepare_subs = NULL;
+}
+
+static void i_usX2Y_subs_startup(struct urb *urb, struct pt_regs *regs)
+{
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+ snd_usX2Y_substream_t *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, regs);
+}
+
+static void usX2Y_subs_prepare(snd_usX2Y_substream_t *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(snd_usX2Y_substream_t *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]);
+
+ if (subs->tmpbuf) {
+ kfree(subs->tmpbuf);
+ subs->tmpbuf = NULL;
+ }
+}
+/*
+ * initialize a substream's urbs
+ */
+static int usX2Y_urbs_allocate(snd_usX2Y_substream_t *subs)
+{
+ int i;
+ unsigned int pipe;
+ int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+ struct usb_device *dev = subs->usX2Y->chip.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(snd_usX2Y_substream_t *subs)
+{
+ usX2Ydev_t *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(snd_usX2Y_substream_t *subs)
+{
+ int i, err;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+
+ if ((err = usX2Y_urbs_allocate(subs)) < 0)
+ return err;
+ subs->completed_urb = NULL;
+ for (i = 0; i < 4; i++) {
+ snd_usX2Y_substream_t *subs = usX2Y->subs[i];
+ if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
+ goto start;
+ }
+ usX2Y->wait_iso_frame = -1;
+ 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->chip.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 (0 > usX2Y->wait_iso_frame)
+ 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(snd_pcm_substream_t *substream)
+{
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)substream->runtime->private_data;
+ return subs->hwptr_done;
+}
+/*
+ * start/stop substream
+ */
+static int snd_usX2Y_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
+{
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)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 pt_regs *regs)
+{
+ usX2Ydev_t* usX2Y = urb->context;
+
+ if (urb->status) {
+ snd_printk("snd_usX2Y_04Int() urb->status=%i\n", urb->status);
+ }
+ if (0 == --usX2Y->US04->len)
+ wake_up(&usX2Y->In04WaitQueue);
+}
+
+static int usX2Y_rate_set(usX2Ydev_t *usX2Y, int rate)
+{
+ int err = 0, i;
+ snd_usX2Y_urbSeq_t *us = NULL;
+ int *usbdata = NULL;
+ struct s_c2 *ra = rate == 48000 ? SetRate48000 : SetRate44100;
+
+ if (usX2Y->rate != rate) {
+ us = kmalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
+ if (NULL == us) {
+ err = -ENOMEM;
+ goto cleanup;
+ }
+ memset(us, 0, sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS);
+ 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->chip.dev, usb_sndbulkpipe(usX2Y->chip.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(usX2Ydev_t *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->chip.midi_list) {
+ snd_usbmidi_input_stop(p);
+ }
+ usb_kill_urb(usX2Y->In04urb);
+ if ((err = usb_set_interface(usX2Y->chip.dev, 0, alternate))) {
+ snd_printk("usb_set_interface error \n");
+ return err;
+ }
+ usX2Y->In04urb->dev = usX2Y->chip.dev;
+ err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
+ list_for_each(p, &usX2Y->chip.midi_list) {
+ snd_usbmidi_input_start(p);
+ }
+ usX2Y->format = format;
+ usX2Y->rate = 0;
+ return err;
+}
+
+
+static int snd_usX2Y_pcm_hw_params(snd_pcm_substream_t *substream,
+ snd_pcm_hw_params_t *hw_params)
+{
+ int err = 0;
+ unsigned int rate = params_rate(hw_params);
+ snd_pcm_format_t format = params_format(hw_params);
+ 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
+ snd_card_t *card = substream->pstr->pcm->card;
+ struct list_head *list;
+ list_for_each(list, &card->devices) {
+ snd_device_t *dev;
+ snd_pcm_t *pcm;
+ int s;
+ dev = snd_device(list);
+ if (dev->type != SNDRV_DEV_PCM)
+ continue;
+ pcm = dev->device_data;
+ for (s = 0; s < 2; ++s) {
+ snd_pcm_substream_t *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("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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+ down(&subs->usX2Y->prepare_mutex);
+ snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
+
+ if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
+ snd_usX2Y_substream_t *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 {
+ snd_usX2Y_substream_t *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);
+ }
+ }
+ up(&subs->usX2Y->prepare_mutex);
+ return snd_pcm_lib_free_pages(substream);
+}
+/*
+ * prepare callback
+ *
+ * set format and initialize urbs
+ */
+static int snd_usX2Y_pcm_prepare(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+ usX2Ydev_t *usX2Y = subs->usX2Y;
+ snd_usX2Y_substream_t *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
+ int err = 0;
+ snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
+
+ down(&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:
+ up(&usX2Y->prepare_mutex);
+ return err;
+}
+
+static snd_pcm_hardware_t snd_usX2Y_2c =
+{
+ .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP_VALID),
+ .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(snd_pcm_substream_t *substream)
+{
+ snd_usX2Y_substream_t *subs = ((snd_usX2Y_substream_t **)
+ snd_pcm_substream_chip(substream))[substream->stream];
+ snd_pcm_runtime_t *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(snd_pcm_substream_t *substream)
+{
+ snd_pcm_runtime_t *runtime = substream->runtime;
+ snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+ int err = 0;
+
+ subs->pcm_substream = NULL;
+
+ return err;
+}
+
+
+static snd_pcm_ops_t 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(snd_usX2Y_substream_t **usX2Y_substream)
+{
+ if (NULL != usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]) {
+ 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(snd_pcm_t *pcm)
+{
+ snd_usX2Y_substream_t **usX2Y_stream = pcm->private_data;
+ if (usX2Y_stream) {
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+ usX2Y_audio_stream_free(usX2Y_stream);
+ }
+}
+
+static int usX2Y_audio_stream_new(snd_card_t *card, int playback_endpoint, int capture_endpoint)
+{
+ snd_pcm_t *pcm;
+ int err, i;
+ snd_usX2Y_substream_t **usX2Y_substream =
+ usX2Y(card)->subs + 2 * usX2Y(card)->chip.pcm_devs;
+
+ for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
+ i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
+ usX2Y_substream[i] = kcalloc(1, sizeof(snd_usX2Y_substream_t), 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)->chip.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)->chip.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)->chip.pcm_devs++;
+
+ return 0;
+}
+
+/*
+ * create a chip instance and set its names.
+ */
+int usX2Y_audio_create(snd_card_t* card)
+{
+ int err = 0;
+
+ INIT_LIST_HEAD(&usX2Y(card)->chip.pcm_list);
+
+ if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
+ return err;
+ if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) == USB_ID_US428)
+ if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
+ return err;
+ if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) != USB_ID_US122)
+ err = usX2Y_rate_set(usX2Y(card), 44100); // Lets us428 recognize output-volume settings, disturbs us122.
+ return err;
+}