| /* |
| * (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/bitops.h> |
| #include <linux/init.h> |
| #include <linux/list.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/usb.h> |
| #include <sound/core.h> |
| #include <sound/info.h> |
| #include <sound/pcm.h> |
| #include <sound/seq_device.h> |
| #define SNDRV_GET_ID |
| #include <sound/initval.h> |
| |
| #include "usbaudio.h" |
| |
| |
| MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); |
| MODULE_DESCRIPTION("USB Audio"); |
| MODULE_LICENSE("GPL"); |
| MODULE_CLASSES("{sound}"); |
| MODULE_DEVICES("{{Generic,USB Audio}}"); |
| |
| |
| static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
| static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
| static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */ |
| static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */ |
| static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */ |
| |
| MODULE_PARM(index, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); |
| MODULE_PARM_SYNTAX(index, SNDRV_INDEX_DESC); |
| MODULE_PARM(id, "1-" __MODULE_STRING(SNDRV_CARDS) "s"); |
| MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); |
| MODULE_PARM_SYNTAX(id, SNDRV_ID_DESC); |
| MODULE_PARM(enable, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| MODULE_PARM_DESC(enable, "Enable USB audio adapter."); |
| MODULE_PARM_SYNTAX(enable, SNDRV_ENABLE_DESC); |
| MODULE_PARM(vid, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); |
| MODULE_PARM_SYNTAX(vid, SNDRV_ENABLED ",allows:{{-1,0xffff}},base:16"); |
| MODULE_PARM(pid, "1-" __MODULE_STRING(SNDRV_CARDS) "i"); |
| MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); |
| MODULE_PARM_SYNTAX(pid, SNDRV_ENABLED ",allows:{{-1,0xffff}},base:16"); |
| |
| |
| /* |
| * for using ASYNC unlink mode, define the following. |
| * this will make the driver quicker response for request to STOP-trigger, |
| * but it may cause oops by some unknown reason (bug of usb driver?), |
| * so turning off might be sure. |
| */ |
| /* #define SND_USE_ASYNC_UNLINK */ |
| |
| #ifdef SND_USB_ASYNC_UNLINK |
| #define UNLINK_FLAGS URB_ASYNC_UNLINK |
| #else |
| #define UNLINK_FLAGS 0 |
| #endif |
| |
| |
| /* |
| * |
| */ |
| |
| #define NRPACKS 4 /* 4ms per urb */ |
| #define MAX_URBS 5 /* max. 20ms long packets */ |
| #define SYNC_URBS 2 /* always two urbs for sync */ |
| #define MIN_PACKS_URB 1 /* minimum 1 packet per urb */ |
| |
| typedef struct snd_usb_substream snd_usb_substream_t; |
| typedef struct snd_usb_stream snd_usb_stream_t; |
| typedef struct snd_urb_ctx snd_urb_ctx_t; |
| |
| struct audioformat { |
| struct list_head list; |
| snd_pcm_format_t format; /* format type */ |
| int channels; /* # channels */ |
| int iface; /* interface number */ |
| unsigned char altsetting; /* corresponding alternate setting */ |
| unsigned char altset_idx; /* array index of altenate setting */ |
| unsigned char attributes; /* corresponding attributes of cs endpoint */ |
| unsigned char endpoint; /* endpoint */ |
| unsigned char ep_attr; /* endpoint attributes */ |
| unsigned int rates; /* rate bitmasks */ |
| int rate_min, rate_max; /* min/max rates */ |
| int nr_rates; /* number of rate table entries */ |
| int *rate_table; /* rate table */ |
| }; |
| |
| struct snd_urb_ctx { |
| struct urb *urb; |
| snd_usb_substream_t *subs; |
| int index; /* index for urb array */ |
| int packets; /* number of packets per urb */ |
| int transfer; /* transferred size */ |
| char *buf; /* buffer for capture */ |
| }; |
| |
| struct snd_urb_ops { |
| int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u); |
| int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u); |
| int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u); |
| int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u); |
| }; |
| |
| struct snd_usb_substream { |
| snd_usb_stream_t *stream; |
| struct usb_device *dev; |
| snd_pcm_substream_t *pcm_substream; |
| int direction; /* playback or capture */ |
| int interface; /* current interface */ |
| int endpoint; /* assigned endpoint */ |
| unsigned int format; /* USB data format */ |
| unsigned int datapipe; /* the data i/o pipe */ |
| unsigned int syncpipe; /* 1 - async out or adaptive in */ |
| unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */ |
| unsigned int freqn; /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */ |
| unsigned int freqm; /* momentary sampling rate in USB format, i.e. fs/1000 in Q10.14 */ |
| unsigned int freqmax; /* maximum sampling rate, used for buffer management */ |
| unsigned int phase; /* phase accumulator */ |
| unsigned int maxpacksize; /* max packet size in bytes */ |
| unsigned int maxframesize; /* max packet size in frames */ |
| unsigned int curpacksize; /* current packet size in bytes (for capture) */ |
| unsigned int curframesize; /* current packet size in frames (for capture) */ |
| unsigned int fill_max: 1; /* fill max packet size always */ |
| |
| unsigned int running: 1; /* running status */ |
| |
| int hwptr; /* free frame position in the buffer (only for playback) */ |
| int hwptr_done; /* processed frame position in the buffer */ |
| int transfer_sched; /* scheduled frames since last period (for playback) */ |
| int transfer_done; /* processed frames since last period update */ |
| unsigned long active_mask; /* bitmask of active urbs */ |
| unsigned long unlink_mask; /* bitmask of unlinked urbs */ |
| |
| int nurbs; /* # urbs */ |
| snd_urb_ctx_t dataurb[MAX_URBS]; /* data urb table */ |
| snd_urb_ctx_t syncurb[SYNC_URBS]; /* sync urb table */ |
| char syncbuf[SYNC_URBS * NRPACKS * 3]; /* sync buffer; it's so small - let's get static */ |
| char *tmpbuf; /* temporary buffer for playback */ |
| |
| u64 formats; /* format bitmasks (all or'ed) */ |
| int num_formats; /* number of supported audio formats (list) */ |
| struct list_head fmt_list; /* format list */ |
| spinlock_t lock; |
| |
| struct snd_urb_ops ops; /* callbacks (must be filled at init) */ |
| }; |
| |
| |
| struct snd_usb_stream { |
| snd_usb_audio_t *chip; |
| snd_pcm_t *pcm; |
| int pcm_index; |
| snd_usb_substream_t substream[2]; |
| struct list_head list; |
| snd_info_entry_t *proc_entry; |
| }; |
| |
| #define chip_t snd_usb_stream_t |
| |
| |
| /* |
| * we keep the snd_usb_audio_t instances by ourselves for merging |
| * the all interfaces on the same card as one sound device. |
| */ |
| |
| static DECLARE_MUTEX(register_mutex); |
| static snd_usb_audio_t *usb_chip[SNDRV_CARDS]; |
| |
| |
| /* |
| * convert a sampling rate into USB format (fs/1000 in Q10.14) |
| * this will overflow at approx 2MSPS |
| */ |
| inline static unsigned get_usb_rate(unsigned int rate) |
| { |
| return ((rate << 11) + 62) / 125; |
| } |
| |
| |
| /* |
| * prepare urb for capture sync pipe |
| * |
| * fill the length and offset of each urb descriptor. |
| * the fixed 10.14 frequency is passed through the pipe. |
| */ |
| static int prepare_capture_sync_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| unsigned char *cp = urb->transfer_buffer; |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| int i, offs; |
| |
| urb->number_of_packets = ctx->packets; |
| urb->dev = ctx->subs->dev; /* we need to set this at each time */ |
| for (i = offs = 0; i < urb->number_of_packets; i++, offs += 3, cp += 3) { |
| urb->iso_frame_desc[i].length = 3; |
| urb->iso_frame_desc[i].offset = offs; |
| cp[0] = subs->freqn; |
| cp[1] = subs->freqn >> 8; |
| cp[2] = subs->freqn >> 16; |
| } |
| urb->interval = 1; |
| return 0; |
| } |
| |
| /* |
| * process after capture sync complete |
| * - nothing to do |
| */ |
| static int retire_capture_sync_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| return 0; |
| } |
| |
| /* |
| * prepare urb for capture data pipe |
| * |
| * fill the offset and length of each descriptor. |
| * |
| * we use a temporary buffer to write the captured data. |
| * since the length of written data is determined by host, we cannot |
| * write onto the pcm buffer directly... the data is thus copied |
| * later at complete callback to the global buffer. |
| */ |
| static int prepare_capture_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| int i, offs; |
| unsigned long flags; |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| |
| offs = 0; |
| urb->dev = ctx->subs->dev; /* we need to set this at each time */ |
| urb->number_of_packets = 0; |
| spin_lock_irqsave(&subs->lock, flags); |
| for (i = 0; i < ctx->packets; i++) { |
| urb->iso_frame_desc[i].offset = offs; |
| urb->iso_frame_desc[i].length = subs->curpacksize; |
| offs += subs->curpacksize; |
| urb->number_of_packets++; |
| subs->transfer_sched += subs->curframesize; |
| if (subs->transfer_sched >= runtime->period_size) { |
| subs->transfer_sched -= runtime->period_size; |
| break; |
| } |
| } |
| spin_unlock_irqrestore(&subs->lock, flags); |
| urb->transfer_buffer = ctx->buf; |
| urb->transfer_buffer_length = offs; |
| urb->interval = 1; |
| #if 0 // for check |
| if (! urb->bandwidth) { |
| int bustime; |
| bustime = usb_check_bandwidth(urb->dev, urb); |
| if (bustime < 0) |
| return bustime; |
| printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets); |
| usb_claim_bandwidth(urb->dev, urb, bustime, 1); |
| } |
| #endif // for check |
| return 0; |
| } |
| |
| /* |
| * process after capture complete |
| * |
| * copy the data from each desctiptor to the pcm buffer, and |
| * update the current position. |
| */ |
| static int retire_capture_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| unsigned long flags; |
| unsigned char *cp; |
| int stride, i, len, oldptr; |
| |
| stride = runtime->frame_bits >> 3; |
| |
| for (i = 0; i < urb->number_of_packets; i++) { |
| cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset; |
| if (urb->iso_frame_desc[i].status) { |
| snd_printd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status); |
| // continue; |
| } |
| len = urb->iso_frame_desc[i].actual_length / stride; |
| if (! len) |
| continue; |
| /* update the current pointer */ |
| spin_lock_irqsave(&subs->lock, flags); |
| oldptr = subs->hwptr_done; |
| subs->hwptr_done += len; |
| if (subs->hwptr_done >= runtime->buffer_size) |
| subs->hwptr_done -= runtime->buffer_size; |
| subs->transfer_done += len; |
| spin_unlock_irqrestore(&subs->lock, flags); |
| /* copy a data chunk */ |
| if (oldptr + len > runtime->buffer_size) { |
| int cnt = runtime->buffer_size - oldptr; |
| int blen = cnt * stride; |
| memcpy(runtime->dma_area + oldptr * stride, cp, blen); |
| memcpy(runtime->dma_area, cp + blen, len * stride - blen); |
| } else { |
| memcpy(runtime->dma_area + oldptr * stride, cp, len * stride); |
| } |
| /* update the pointer, call callback if necessary */ |
| spin_lock_irqsave(&subs->lock, flags); |
| if (subs->transfer_done >= runtime->period_size) { |
| subs->transfer_done -= runtime->period_size; |
| spin_unlock_irqrestore(&subs->lock, flags); |
| snd_pcm_period_elapsed(subs->pcm_substream); |
| } else |
| spin_unlock_irqrestore(&subs->lock, flags); |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * prepare urb for playback sync pipe |
| * |
| * set up the offset and length to receive the current frequency. |
| */ |
| |
| static int prepare_playback_sync_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| int i, offs; |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| |
| urb->number_of_packets = ctx->packets; |
| urb->dev = ctx->subs->dev; /* we need to set this at each time */ |
| for (i = offs = 0; i < urb->number_of_packets; i++, offs += 3) { |
| urb->iso_frame_desc[i].length = 3; |
| urb->iso_frame_desc[i].offset = offs; |
| } |
| return 0; |
| } |
| |
| /* |
| * process after playback sync complete |
| * |
| * retrieve the current 10.14 frequency from pipe, and set it. |
| * the value is referred in prepare_playback_urb(). |
| */ |
| static int retire_playback_sync_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| unsigned int f, i, found; |
| unsigned char *cp = urb->transfer_buffer; |
| unsigned long flags; |
| |
| found = 0; |
| for (i = 0; i < urb->number_of_packets; i++, cp += 3) { |
| if (urb->iso_frame_desc[i].status || |
| urb->iso_frame_desc[i].actual_length < 3) |
| continue; |
| f = combine_triple(cp); |
| if (f < subs->freqn - (subs->freqn>>3) || f > subs->freqmax) { |
| snd_printd(KERN_WARNING "requested frequency %u (nominal %u) out of range!\n", f, subs->freqn); |
| continue; |
| } |
| found = f; |
| } |
| if (found) { |
| spin_lock_irqsave(&subs->lock, flags); |
| subs->freqm = found; |
| spin_unlock_irqrestore(&subs->lock, flags); |
| } |
| |
| 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 prepare_playback_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| int i, stride, offs; |
| int counts; |
| unsigned long flags; |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| |
| stride = runtime->frame_bits >> 3; |
| |
| offs = 0; |
| urb->dev = ctx->subs->dev; /* we need to set this at each time */ |
| urb->number_of_packets = 0; |
| spin_lock_irqsave(&subs->lock, flags); |
| for (i = 0; i < ctx->packets; i++) { |
| /* calculate the size of a packet */ |
| if (subs->fill_max) |
| counts = subs->maxframesize; /* fixed */ |
| else { |
| subs->phase = (subs->phase & 0x3fff) + subs->freqm; |
| counts = subs->phase >> 14; |
| if (counts > subs->maxframesize) |
| counts = subs->maxframesize; |
| } |
| /* set up descriptor */ |
| urb->iso_frame_desc[i].offset = offs * stride; |
| urb->iso_frame_desc[i].length = counts * stride; |
| offs += counts; |
| urb->number_of_packets++; |
| subs->transfer_sched += counts; |
| if (subs->transfer_sched >= runtime->period_size) { |
| subs->transfer_sched -= runtime->period_size; |
| break; |
| } |
| } |
| if (subs->hwptr + offs > 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 * stride, len * stride); |
| memcpy(subs->tmpbuf + len * stride, runtime->dma_area, (offs - len) * stride); |
| subs->hwptr += offs; |
| subs->hwptr -= runtime->buffer_size; |
| } else { |
| /* set the buffer pointer */ |
| urb->transfer_buffer = runtime->dma_area + subs->hwptr * stride; |
| subs->hwptr += offs; |
| } |
| spin_unlock_irqrestore(&subs->lock, flags); |
| urb->transfer_buffer_length = offs * stride; |
| ctx->transfer = offs; |
| |
| return 0; |
| } |
| |
| /* |
| * process after playback data complete |
| * |
| * update the current position and call callback if a period is processed. |
| */ |
| static int retire_playback_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| unsigned long flags; |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| |
| spin_lock_irqsave(&subs->lock, flags); |
| subs->transfer_done += ctx->transfer; |
| subs->hwptr_done += ctx->transfer; |
| ctx->transfer = 0; |
| 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; |
| spin_unlock_irqrestore(&subs->lock, flags); |
| snd_pcm_period_elapsed(subs->pcm_substream); |
| } else |
| spin_unlock_irqrestore(&subs->lock, flags); |
| return 0; |
| } |
| |
| |
| /* |
| */ |
| static struct snd_urb_ops audio_urb_ops[2] = { |
| { |
| .prepare = prepare_playback_urb, |
| .retire = retire_playback_urb, |
| .prepare_sync = prepare_playback_sync_urb, |
| .retire_sync = retire_playback_sync_urb, |
| }, |
| { |
| .prepare = prepare_capture_urb, |
| .retire = retire_capture_urb, |
| .prepare_sync = prepare_capture_sync_urb, |
| .retire_sync = retire_capture_sync_urb, |
| }, |
| }; |
| |
| /* |
| * complete callback from data urb |
| */ |
| #ifndef OLD_USB |
| static void snd_complete_urb(struct urb *urb, struct pt_regs *regs) |
| #else |
| static void snd_complete_urb(struct urb *urb) |
| #endif |
| { |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| snd_usb_substream_t *subs = ctx->subs; |
| snd_pcm_substream_t *substream = ctx->subs->pcm_substream; |
| int err; |
| |
| clear_bit(ctx->index, &subs->active_mask); |
| if (subs->running && subs->ops.retire(subs, substream->runtime, urb)) |
| return; |
| if (! subs->running) /* can be stopped during retire callback */ |
| return; |
| if ((err = subs->ops.prepare(subs, substream->runtime, urb) < 0) || |
| (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { |
| snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err); |
| snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
| return; |
| } |
| set_bit(ctx->index, &subs->active_mask); |
| } |
| |
| |
| /* |
| * complete callback from sync urb |
| */ |
| #ifndef OLD_USB |
| static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs) |
| #else |
| static void snd_complete_sync_urb(struct urb *urb) |
| #endif |
| { |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| snd_usb_substream_t *subs = ctx->subs; |
| snd_pcm_substream_t *substream = ctx->subs->pcm_substream; |
| int err; |
| |
| clear_bit(ctx->index + 16, &subs->active_mask); |
| if (subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) |
| return; |
| if (! subs->running) /* can be stopped during retire callback */ |
| return; |
| if ((err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 || |
| (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { |
| snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err); |
| snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); |
| return; |
| } |
| set_bit(ctx->index + 16, &subs->active_mask); |
| } |
| |
| |
| /* |
| * unlink active urbs. |
| * return the number of active urbs. |
| */ |
| static int deactivate_urbs(snd_usb_substream_t *subs) |
| { |
| int i, alive; |
| |
| subs->running = 0; |
| |
| if (subs->stream->chip->shutdown) /* to be sure... */ |
| return 0; |
| |
| #ifndef SND_USB_ASYNC_UNLINK |
| if (in_interrupt()) |
| return 0; |
| #endif |
| alive = 0; |
| for (i = 0; i < subs->nurbs; i++) { |
| if (test_bit(i, &subs->active_mask)) { |
| alive++; |
| if (! test_and_set_bit(i, &subs->unlink_mask)) |
| usb_unlink_urb(subs->dataurb[i].urb); |
| } |
| } |
| if (subs->syncpipe) { |
| for (i = 0; i < SYNC_URBS; i++) { |
| if (test_bit(i+16, &subs->active_mask)) { |
| alive++; |
| if (! test_and_set_bit(i+16, &subs->unlink_mask)) |
| usb_unlink_urb(subs->syncurb[i].urb); |
| } |
| } |
| } |
| #ifdef SND_USB_ASYNC_UNLINK |
| return alive; |
| #else |
| return 0; |
| #endif |
| } |
| |
| |
| /* |
| * set up and start data/sync urbs |
| */ |
| static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime) |
| { |
| int i, err; |
| |
| for (i = 0; i < subs->nurbs; i++) { |
| snd_assert(subs->dataurb[i].urb, return -EINVAL); |
| if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) { |
| snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i); |
| goto __error; |
| } |
| } |
| if (subs->syncpipe) { |
| for (i = 0; i < SYNC_URBS; i++) { |
| snd_assert(subs->syncurb[i].urb, return -EINVAL); |
| if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) { |
| snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i); |
| goto __error; |
| } |
| } |
| } |
| |
| subs->running = 1; |
| for (i = 0; i < subs->nurbs; i++) { |
| if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_KERNEL)) < 0) { |
| snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err); |
| goto __error; |
| } |
| set_bit(i, &subs->active_mask); |
| } |
| if (subs->syncpipe) { |
| for (i = 0; i < SYNC_URBS; i++) { |
| if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_KERNEL)) < 0) { |
| snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err); |
| goto __error; |
| } |
| set_bit(i + 16, &subs->active_mask); |
| } |
| } |
| return 0; |
| |
| __error: |
| // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN); |
| deactivate_urbs(subs); |
| return -EPIPE; |
| } |
| |
| |
| /* |
| * wait until all urbs are processed. |
| */ |
| static int wait_clear_urbs(snd_usb_substream_t *subs) |
| { |
| int timeout = HZ; |
| int i, alive; |
| |
| do { |
| alive = 0; |
| for (i = 0; i < subs->nurbs; i++) { |
| if (test_bit(i, &subs->active_mask)) |
| alive++; |
| } |
| if (subs->syncpipe) { |
| for (i = 0; i < SYNC_URBS; i++) { |
| if (test_bit(i + 16, &subs->active_mask)) |
| alive++; |
| } |
| } |
| if (! alive) |
| break; |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| schedule_timeout(1); |
| set_current_state(TASK_RUNNING); |
| } while (--timeout > 0); |
| if (alive) |
| snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive); |
| return 0; |
| } |
| |
| |
| /* |
| * return the current pcm pointer. just return the hwptr_done value. |
| */ |
| static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream) |
| { |
| snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data; |
| return subs->hwptr_done; |
| } |
| |
| |
| /* |
| * start/stop substream |
| */ |
| static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd) |
| { |
| snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data; |
| int err; |
| |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| err = start_urbs(subs, substream->runtime); |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| err = deactivate_urbs(subs); |
| break; |
| default: |
| err = -EINVAL; |
| break; |
| } |
| return err < 0 ? err : 0; |
| } |
| |
| |
| /* |
| * release a urb data |
| */ |
| static void release_urb_ctx(snd_urb_ctx_t *u) |
| { |
| if (u->urb) { |
| usb_free_urb(u->urb); |
| u->urb = 0; |
| } |
| if (u->buf) { |
| kfree(u->buf); |
| u->buf = 0; |
| } |
| } |
| |
| /* |
| * release a substream |
| */ |
| static void release_substream_urbs(snd_usb_substream_t *subs) |
| { |
| int i; |
| |
| /* stop urbs (to be sure) */ |
| if (deactivate_urbs(subs) > 0) |
| wait_clear_urbs(subs); |
| |
| for (i = 0; i < MAX_URBS; i++) |
| release_urb_ctx(&subs->dataurb[i]); |
| for (i = 0; i < SYNC_URBS; i++) |
| release_urb_ctx(&subs->syncurb[i]); |
| if (subs->tmpbuf) { |
| kfree(subs->tmpbuf); |
| subs->tmpbuf = 0; |
| } |
| subs->nurbs = 0; |
| } |
| |
| /* |
| * initialize a substream for plaback/capture |
| */ |
| static int init_substream_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime) |
| { |
| int maxsize, n, i; |
| int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; |
| int npacks[MAX_URBS], total_packs; |
| |
| /* calculate the frequency in 10.14 format */ |
| subs->freqn = subs->freqm = get_usb_rate(runtime->rate); |
| subs->freqmax = subs->freqn + (subs->freqn >> 2); /* max. allowed frequency */ |
| subs->phase = 0; |
| |
| /* reset the pointer */ |
| subs->hwptr = 0; |
| subs->hwptr_done = 0; |
| subs->transfer_sched = 0; |
| subs->transfer_done = 0; |
| subs->active_mask = 0; |
| subs->unlink_mask = 0; |
| |
| /* calculate the max. size of packet */ |
| maxsize = ((subs->freqmax + 0x3fff) * (runtime->frame_bits >> 3)) >> 14; |
| if (subs->maxpacksize && maxsize > subs->maxpacksize) { |
| //snd_printd(KERN_DEBUG "maxsize %d is greater than defined size %d\n", |
| // maxsize, subs->maxpacksize); |
| maxsize = subs->maxpacksize; |
| } |
| |
| if (subs->fill_max) |
| subs->curpacksize = subs->maxpacksize; |
| else |
| subs->curpacksize = maxsize; |
| subs->curframesize = bytes_to_frames(runtime, subs->curpacksize); |
| |
| /* allocate a temporary buffer for playback */ |
| if (is_playback) { |
| subs->tmpbuf = kmalloc(maxsize * NRPACKS, GFP_KERNEL); |
| if (! subs->tmpbuf) { |
| snd_printk(KERN_ERR "cannot malloc tmpbuf\n"); |
| return -ENOMEM; |
| } |
| } |
| |
| /* decide how many packets to be used */ |
| total_packs = (frames_to_bytes(runtime, runtime->period_size) + maxsize - 1) / maxsize; |
| if (total_packs < 2 * MIN_PACKS_URB) |
| total_packs = 2 * MIN_PACKS_URB; |
| subs->nurbs = (total_packs + NRPACKS - 1) / NRPACKS; |
| if (subs->nurbs > MAX_URBS) { |
| /* too much... */ |
| subs->nurbs = MAX_URBS; |
| total_packs = MAX_URBS * NRPACKS; |
| } |
| n = total_packs; |
| for (i = 0; i < subs->nurbs; i++) { |
| npacks[i] = n > NRPACKS ? NRPACKS : n; |
| n -= NRPACKS; |
| } |
| if (subs->nurbs <= 1) { |
| /* too little - we need at least two packets |
| * to ensure contiguous playback/capture |
| */ |
| subs->nurbs = 2; |
| npacks[0] = (total_packs + 1) / 2; |
| npacks[1] = total_packs - npacks[0]; |
| } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB) { |
| /* the last packet is too small.. */ |
| if (subs->nurbs > 2) { |
| /* merge to the first one */ |
| npacks[0] += npacks[subs->nurbs - 1]; |
| subs->nurbs--; |
| } else { |
| /* divide to two */ |
| subs->nurbs = 2; |
| npacks[0] = (total_packs + 1) / 2; |
| npacks[1] = total_packs - npacks[0]; |
| } |
| } |
| |
| /* allocate and initialize data urbs */ |
| for (i = 0; i < subs->nurbs; i++) { |
| snd_urb_ctx_t *u = &subs->dataurb[i]; |
| u->index = i; |
| u->subs = subs; |
| u->transfer = 0; |
| u->packets = npacks[i]; |
| if (! is_playback) { |
| /* allocate a capture buffer per urb */ |
| u->buf = kmalloc(maxsize * u->packets, GFP_KERNEL); |
| if (! u->buf) { |
| release_substream_urbs(subs); |
| return -ENOMEM; |
| } |
| } |
| u->urb = usb_alloc_urb(u->packets, GFP_KERNEL); |
| if (! u->urb) { |
| release_substream_urbs(subs); |
| return -ENOMEM; |
| } |
| u->urb->dev = subs->dev; |
| u->urb->pipe = subs->datapipe; |
| u->urb->transfer_flags = URB_ISO_ASAP | UNLINK_FLAGS; |
| u->urb->number_of_packets = u->packets; |
| u->urb->context = u; |
| u->urb->complete = (usb_complete_t)snd_complete_urb; |
| } |
| |
| if (subs->syncpipe) { |
| /* allocate and initialize sync urbs */ |
| for (i = 0; i < SYNC_URBS; i++) { |
| snd_urb_ctx_t *u = &subs->syncurb[i]; |
| u->index = i; |
| u->subs = subs; |
| u->packets = NRPACKS; |
| u->urb = usb_alloc_urb(u->packets, GFP_KERNEL); |
| if (! u->urb) { |
| release_substream_urbs(subs); |
| return -ENOMEM; |
| } |
| u->urb->transfer_buffer = subs->syncbuf + i * NRPACKS * 3; |
| u->urb->transfer_buffer_length = NRPACKS * 3; |
| u->urb->dev = subs->dev; |
| u->urb->pipe = subs->syncpipe; |
| u->urb->transfer_flags = URB_ISO_ASAP | UNLINK_FLAGS; |
| u->urb->number_of_packets = u->packets; |
| u->urb->context = u; |
| u->urb->complete = (usb_complete_t)snd_complete_sync_urb; |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * find a matching audio format |
| */ |
| static struct audioformat *find_format(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime) |
| { |
| struct list_head *p; |
| |
| list_for_each(p, &subs->fmt_list) { |
| struct audioformat *fp; |
| fp = list_entry(p, struct audioformat, list); |
| if (fp->format != runtime->format || |
| fp->channels != runtime->channels) |
| continue; |
| if (runtime->rate < fp->rate_min || runtime->rate > fp->rate_max) |
| continue; |
| if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) |
| return fp; |
| else { |
| int i; |
| for (i = 0; i < fp->nr_rates; i++) |
| if (fp->rate_table[i] == runtime->rate) |
| return fp; |
| } |
| } |
| return NULL; |
| } |
| |
| |
| /* |
| * find a matching format and set up the interface |
| */ |
| static int set_format(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime) |
| { |
| struct usb_device *dev = subs->dev; |
| struct usb_host_config *config = dev->actconfig; |
| struct usb_host_interface *alts; |
| struct usb_interface_descriptor *altsd; |
| struct usb_interface *iface; |
| struct audioformat *fmt; |
| unsigned int ep, attr; |
| unsigned char data[3]; |
| int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; |
| int err; |
| |
| fmt = find_format(subs, runtime); |
| if (! fmt) { |
| snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n", |
| snd_pcm_format_name(runtime->format), runtime->rate, runtime->channels); |
| return -EINVAL; |
| } |
| |
| iface = &config->interface[fmt->iface]; |
| alts = &iface->altsetting[fmt->altset_idx]; |
| altsd = get_iface_desc(alts); |
| snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL); |
| |
| /* close the old interface */ |
| if (subs->interface >= 0 && subs->interface != fmt->iface) { |
| usb_set_interface(subs->dev, subs->interface, 0); |
| subs->interface = -1; |
| subs->format = 0; |
| } |
| |
| /* set interface */ |
| if (subs->interface != fmt->iface || subs->format != fmt->altset_idx) { |
| if (usb_set_interface(dev, fmt->iface, fmt->altset_idx) < 0) { |
| snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n", |
| dev->devnum, fmt->iface, fmt->altsetting); |
| return -EIO; |
| } |
| snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altset_idx); |
| subs->interface = fmt->iface; |
| subs->format = fmt->altset_idx; |
| } |
| |
| /* create a data pipe */ |
| ep = get_endpoint(alts, 0)->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; |
| if (is_playback) |
| subs->datapipe = usb_sndisocpipe(dev, ep); |
| else |
| subs->datapipe = usb_rcvisocpipe(dev, ep); |
| subs->syncpipe = subs->syncinterval = 0; |
| subs->maxpacksize = get_endpoint(alts, 0)->wMaxPacketSize; |
| subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize); |
| subs->fill_max = 0; |
| |
| /* we need a sync pipe in async OUT or adaptive IN mode */ |
| attr = get_endpoint(alts, 0)->bmAttributes & EP_ATTR_MASK; |
| if ((is_playback && attr == EP_ATTR_ASYNC) || |
| (! is_playback && attr == EP_ATTR_ADAPTIVE)) { |
| /* check endpoint */ |
| if (altsd->bNumEndpoints < 2 || |
| get_endpoint(alts, 1)->bmAttributes != 0x01 || |
| get_endpoint(alts, 1)->bSynchAddress != 0) { |
| snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n", |
| dev->devnum, fmt->iface, fmt->altsetting); |
| return -EINVAL; |
| } |
| ep = get_endpoint(alts, 1)->bEndpointAddress; |
| if ((is_playback && ep != (get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || |
| (! is_playback && ep != (get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN))) { |
| snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n", |
| dev->devnum, fmt->iface, fmt->altsetting); |
| return -EINVAL; |
| } |
| ep &= USB_ENDPOINT_NUMBER_MASK; |
| if (is_playback) |
| subs->syncpipe = usb_rcvisocpipe(dev, ep); |
| else |
| subs->syncpipe = usb_sndisocpipe(dev, ep); |
| subs->syncinterval = get_endpoint(alts, 1)->bRefresh; |
| } |
| |
| ep = get_endpoint(alts, 0)->bEndpointAddress; |
| /* if endpoint has pitch control, enable it */ |
| if (fmt->attributes & EP_CS_ATTR_PITCH_CONTROL) { |
| data[0] = 1; |
| if ((err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, |
| USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, |
| PITCH_CONTROL << 8, ep, data, 1, HZ)) < 0) { |
| snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n", |
| dev->devnum, subs->interface, ep); |
| return err; |
| } |
| } |
| /* if endpoint has sampling rate control, set it */ |
| if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) { |
| int crate; |
| data[0] = runtime->rate; |
| data[1] = runtime->rate >> 8; |
| data[2] = runtime->rate >> 16; |
| if ((err = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, |
| USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, |
| SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) { |
| snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n", |
| dev->devnum, subs->interface, fmt->altsetting, runtime->rate, ep); |
| return err; |
| } |
| if ((err = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, |
| USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN, |
| SAMPLING_FREQ_CONTROL << 8, ep, data, 3, HZ)) < 0) { |
| snd_printk(KERN_ERR "%d:%d:%d: cannot get freq at ep 0x%x\n", |
| dev->devnum, subs->interface, fmt->altsetting, ep); |
| return err; |
| } |
| crate = data[0] | (data[1] << 8) | (data[2] << 16); |
| if (crate != runtime->rate) { |
| snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, runtime->rate); |
| // runtime->rate = crate; |
| } |
| } |
| /* always fill max packet size */ |
| if (fmt->attributes & EP_CS_ATTR_FILL_MAX) |
| subs->fill_max = 1; |
| |
| #if 0 |
| printk("setting done: format = %d, rate = %d, channels = %d\n", |
| runtime->format, runtime->rate, runtime->channels); |
| printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n", |
| subs->datapipe, subs->syncpipe); |
| #endif |
| |
| return 0; |
| } |
| |
| /* |
| * allocate a buffer. |
| * |
| * 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 int snd_usb_hw_params(snd_pcm_substream_t *substream, |
| snd_pcm_hw_params_t *hw_params) |
| { |
| return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); |
| } |
| |
| /* |
| * free the buffer |
| */ |
| static int snd_usb_hw_free(snd_pcm_substream_t *substream) |
| { |
| return snd_pcm_lib_free_pages(substream); |
| } |
| |
| /* |
| * prepare callback |
| * |
| * set format and initialize urbs |
| */ |
| static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream) |
| { |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data; |
| int err; |
| |
| release_substream_urbs(subs); |
| if ((err = set_format(subs, runtime)) < 0) |
| return err; |
| |
| return init_substream_urbs(subs, runtime); |
| } |
| |
| static snd_pcm_hardware_t snd_usb_playback = |
| { |
| .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| SNDRV_PCM_INFO_MMAP_VALID), |
| .buffer_bytes_max = (128*1024), |
| .period_bytes_min = 64, |
| .period_bytes_max = (128*1024), |
| .periods_min = 2, |
| .periods_max = 1024, |
| }; |
| |
| static snd_pcm_hardware_t snd_usb_capture = |
| { |
| .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| SNDRV_PCM_INFO_MMAP_VALID), |
| .buffer_bytes_max = (128*1024), |
| .period_bytes_min = 64, |
| .period_bytes_max = (128*1024), |
| .periods_min = 2, |
| .periods_max = 1024, |
| }; |
| |
| /* |
| * set up the runtime hardware information. |
| */ |
| |
| static void setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs) |
| { |
| struct list_head *p; |
| |
| runtime->hw.formats = subs->formats; |
| |
| runtime->hw.rate_min = 0x7fffffff; |
| runtime->hw.rate_max = 0; |
| runtime->hw.channels_min = 256; |
| runtime->hw.channels_max = 0; |
| runtime->hw.rates = 0; |
| /* check min/max rates and channels */ |
| list_for_each(p, &subs->fmt_list) { |
| struct audioformat *fp; |
| fp = list_entry(p, struct audioformat, list); |
| runtime->hw.rates |= fp->rates; |
| if (runtime->hw.rate_min > fp->rate_min) |
| runtime->hw.rate_min = fp->rate_min; |
| if (runtime->hw.rate_max < fp->rate_max) |
| runtime->hw.rate_max = fp->rate_max; |
| if (runtime->hw.channels_min > fp->channels) |
| runtime->hw.channels_min = fp->channels; |
| if (runtime->hw.channels_max < fp->channels) |
| runtime->hw.channels_max = fp->channels; |
| } |
| |
| /* set the period time minimum 1ms */ |
| snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, |
| 1000 * MIN_PACKS_URB, |
| /*(NRPACKS * MAX_URBS) * 1000*/ UINT_MAX); |
| |
| /* FIXME: we need more constraints to restrict the format type, |
| * channels and rates according to the audioformat list! |
| */ |
| } |
| |
| static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction, |
| snd_pcm_hardware_t *hw) |
| { |
| snd_usb_stream_t *as = snd_pcm_substream_chip(substream); |
| snd_pcm_runtime_t *runtime = substream->runtime; |
| snd_usb_substream_t *subs = &as->substream[direction]; |
| |
| subs->interface = -1; |
| subs->format = 0; |
| runtime->hw = *hw; |
| runtime->private_data = subs; |
| subs->pcm_substream = substream; |
| setup_hw_info(runtime, subs); |
| return 0; |
| } |
| |
| static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction) |
| { |
| snd_usb_stream_t *as = snd_pcm_substream_chip(substream); |
| snd_usb_substream_t *subs = &as->substream[direction]; |
| |
| release_substream_urbs(subs); |
| if (subs->interface >= 0) |
| usb_set_interface(subs->dev, subs->interface, 0); |
| subs->pcm_substream = NULL; |
| return 0; |
| } |
| |
| static int snd_usb_playback_open(snd_pcm_substream_t *substream) |
| { |
| return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback); |
| } |
| |
| static int snd_usb_playback_close(snd_pcm_substream_t *substream) |
| { |
| return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK); |
| } |
| |
| static int snd_usb_capture_open(snd_pcm_substream_t *substream) |
| { |
| return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture); |
| } |
| |
| static int snd_usb_capture_close(snd_pcm_substream_t *substream) |
| { |
| return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE); |
| } |
| |
| static snd_pcm_ops_t snd_usb_playback_ops = { |
| .open = snd_usb_playback_open, |
| .close = snd_usb_playback_close, |
| .ioctl = snd_pcm_lib_ioctl, |
| .hw_params = snd_usb_hw_params, |
| .hw_free = snd_usb_hw_free, |
| .prepare = snd_usb_pcm_prepare, |
| .trigger = snd_usb_pcm_trigger, |
| .pointer = snd_usb_pcm_pointer, |
| }; |
| |
| static snd_pcm_ops_t snd_usb_capture_ops = { |
| .open = snd_usb_capture_open, |
| .close = snd_usb_capture_close, |
| .ioctl = snd_pcm_lib_ioctl, |
| .hw_params = snd_usb_hw_params, |
| .hw_free = snd_usb_hw_free, |
| .prepare = snd_usb_pcm_prepare, |
| .trigger = snd_usb_pcm_trigger, |
| .pointer = snd_usb_pcm_pointer, |
| }; |
| |
| |
| |
| /* |
| * helper functions |
| */ |
| |
| /* |
| * combine bytes and get an integer value |
| */ |
| unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size) |
| { |
| switch (size) { |
| case 1: return *bytes; |
| case 2: return combine_word(bytes); |
| case 3: return combine_triple(bytes); |
| case 4: return combine_quad(bytes); |
| default: return 0; |
| } |
| } |
| |
| /* |
| * parse descriptor buffer and return the pointer starting the given |
| * descriptor type and interface. |
| * if altsetting is not -1, seek the buffer until the matching alternate |
| * setting is found. |
| */ |
| void *snd_usb_find_desc(void *descstart, int desclen, void *after, |
| u8 dtype, int iface, int altsetting) |
| { |
| u8 *p, *end, *next; |
| int ifc = -1, as = -1; |
| |
| p = descstart; |
| end = p + desclen; |
| for (; p < end;) { |
| if (p[0] < 2) |
| return NULL; |
| next = p + p[0]; |
| if (next > end) |
| return NULL; |
| if (p[1] == USB_DT_INTERFACE) { |
| /* minimum length of interface descriptor */ |
| if (p[0] < 9) |
| return NULL; |
| ifc = p[2]; |
| as = p[3]; |
| } |
| if (p[1] == dtype && (!after || (void *)p > after) && |
| (iface == -1 || iface == ifc) && (altsetting == -1 || altsetting == as)) { |
| return p; |
| } |
| p = next; |
| } |
| return NULL; |
| } |
| |
| /* |
| * find a class-specified interface descriptor with the given subtype. |
| */ |
| void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype, int iface, int altsetting) |
| { |
| unsigned char *p = after; |
| |
| while ((p = snd_usb_find_desc(buffer, buflen, p, |
| USB_DT_CS_INTERFACE, iface, altsetting)) != NULL) { |
| if (p[0] >= 3 && p[2] == dsubtype) |
| return p; |
| } |
| return NULL; |
| } |
| |
| |
| /* |
| * entry point for linux usb interface |
| */ |
| |
| #ifdef OLD_USB |
| static void * usb_audio_probe(struct usb_device *dev, unsigned int ifnum, |
| const struct usb_device_id *id); |
| static void usb_audio_disconnect(struct usb_device *dev, void *ptr); |
| #else |
| static int usb_audio_probe(struct usb_interface *intf, |
| const struct usb_device_id *id); |
| static void usb_audio_disconnect(struct usb_interface *intf); |
| #endif |
| |
| static struct usb_device_id usb_audio_ids [] = { |
| #include "usbquirks.h" |
| { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), |
| .bInterfaceClass = USB_CLASS_AUDIO, |
| .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL }, |
| { } /* Terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE (usb, usb_audio_ids); |
| |
| static struct usb_driver usb_audio_driver = { |
| .name = "snd-usb-audio", |
| .probe = usb_audio_probe, |
| .disconnect = usb_audio_disconnect, |
| #ifdef OLD_USB |
| .driver_list = LIST_HEAD_INIT(usb_audio_driver.driver_list), |
| #endif |
| .id_table = usb_audio_ids, |
| }; |
| |
| |
| /* |
| * proc interface for list the supported pcm formats |
| */ |
| static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer) |
| { |
| struct list_head *p; |
| static char *sync_types[4] = { |
| "NONE", "ASYNC", "ADAPTIVE", "SYNC" |
| }; |
| |
| list_for_each(p, &subs->fmt_list) { |
| struct audioformat *fp; |
| fp = list_entry(p, struct audioformat, list); |
| snd_iprintf(buffer, " Interface %d\n", fp->iface); |
| snd_iprintf(buffer, " Altset %d\n", fp->altset_idx); |
| snd_iprintf(buffer, " Format: %s\n", snd_pcm_format_name(fp->format)); |
| snd_iprintf(buffer, " Channels: %d\n", fp->channels); |
| snd_iprintf(buffer, " Endpoint: %d %s (%s)\n", |
| fp->endpoint & USB_ENDPOINT_NUMBER_MASK, |
| fp->endpoint & USB_DIR_IN ? "IN" : "OUT", |
| sync_types[(fp->ep_attr & EP_ATTR_MASK) >> 2]); |
| if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) { |
| snd_iprintf(buffer, " Rates: %d - %d (continous)\n", |
| fp->rate_min, fp->rate_max); |
| } else { |
| int i; |
| snd_iprintf(buffer, " Rates: "); |
| for (i = 0; i < fp->nr_rates; i++) { |
| if (i > 0) |
| snd_iprintf(buffer, ", "); |
| snd_iprintf(buffer, "%d", fp->rate_table[i]); |
| } |
| snd_iprintf(buffer, "\n"); |
| } |
| } |
| } |
| |
| static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer) |
| { |
| if (subs->running) { |
| int i; |
| snd_iprintf(buffer, " Status: Running\n"); |
| snd_iprintf(buffer, " Interface = %d\n", subs->interface); |
| snd_iprintf(buffer, " Altset = %d\n", subs->format); |
| snd_iprintf(buffer, " URBs = %d [ ", subs->nurbs); |
| for (i = 0; i < subs->nurbs; i++) |
| snd_iprintf(buffer, "%d ", subs->dataurb[i].packets); |
| snd_iprintf(buffer, "]\n"); |
| snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize); |
| snd_iprintf(buffer, " Momentary freq = %d,%03d Hz\n", |
| subs->freqm >> 14, |
| ((subs->freqm & ((1 << 14) - 1)) * 1000) / ((1 << 14) - 1)); |
| } else { |
| snd_iprintf(buffer, " Status: Stop\n"); |
| } |
| } |
| |
| static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) |
| { |
| snd_usb_stream_t *stream = snd_magic_cast(snd_usb_stream_t, entry->private_data, return); |
| |
| snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name); |
| |
| if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) { |
| snd_iprintf(buffer, "\nPlayback:\n"); |
| proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer); |
| proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer); |
| } |
| if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) { |
| snd_iprintf(buffer, "\nCapture:\n"); |
| proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer); |
| proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer); |
| } |
| } |
| |
| static void proc_pcm_format_add(snd_usb_stream_t *stream) |
| { |
| snd_info_entry_t *entry; |
| char name[32]; |
| snd_card_t *card = stream->chip->card; |
| |
| sprintf(name, "stream%d", stream->pcm_index); |
| if ((entry = snd_info_create_card_entry(card, name, card->proc_root)) != NULL) { |
| entry->content = SNDRV_INFO_CONTENT_TEXT; |
| entry->private_data = stream; |
| entry->mode = S_IFREG | S_IRUGO | S_IWUSR; |
| entry->c.text.read_size = 4096; |
| entry->c.text.read = proc_pcm_format_read; |
| if (snd_info_register(entry) < 0) { |
| snd_info_free_entry(entry); |
| entry = NULL; |
| } |
| } |
| stream->proc_entry = entry; |
| } |
| |
| |
| /* |
| * intialize the substream instance. |
| */ |
| |
| static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp) |
| { |
| snd_usb_substream_t *subs = &as->substream[stream]; |
| |
| INIT_LIST_HEAD(&subs->fmt_list); |
| spin_lock_init(&subs->lock); |
| |
| subs->stream = as; |
| subs->direction = stream; |
| subs->dev = as->chip->dev; |
| subs->ops = audio_urb_ops[stream]; |
| snd_pcm_lib_preallocate_pages(as->pcm->streams[stream].substream, |
| 64 * 1024, 128 * 1024, GFP_ATOMIC); |
| snd_pcm_set_ops(as->pcm, stream, |
| stream == SNDRV_PCM_STREAM_PLAYBACK ? |
| &snd_usb_playback_ops : &snd_usb_capture_ops); |
| |
| list_add_tail(&fp->list, &subs->fmt_list); |
| subs->formats |= 1ULL << fp->format; |
| subs->endpoint = fp->endpoint; |
| subs->num_formats++; |
| } |
| |
| |
| /* |
| * free a substream |
| */ |
| static void free_substream(snd_usb_substream_t *subs) |
| { |
| struct list_head *p, *n; |
| |
| if (! subs->num_formats) |
| return; /* not initialized */ |
| list_for_each_safe(p, n, &subs->fmt_list) { |
| struct audioformat *fp = list_entry(p, struct audioformat, list); |
| if (fp->rate_table) |
| kfree(fp->rate_table); |
| kfree(fp); |
| } |
| } |
| |
| |
| /* |
| * free a usb stream instance |
| */ |
| static void snd_usb_audio_stream_free(snd_usb_stream_t *stream) |
| { |
| if (stream->proc_entry) { |
| snd_info_unregister(stream->proc_entry); |
| stream->proc_entry = NULL; |
| } |
| free_substream(&stream->substream[0]); |
| free_substream(&stream->substream[1]); |
| list_del(&stream->list); |
| snd_magic_kfree(stream); |
| } |
| |
| static void snd_usb_audio_pcm_free(snd_pcm_t *pcm) |
| { |
| snd_usb_stream_t *stream = pcm->private_data; |
| if (stream) { |
| stream->pcm = NULL; |
| snd_pcm_lib_preallocate_free_for_all(pcm); |
| snd_usb_audio_stream_free(stream); |
| } |
| } |
| |
| |
| /* |
| * add this endpoint to the chip instance. |
| * if a stream with the same endpoint already exists, append to it. |
| * if not, create a new pcm stream. |
| */ |
| static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp) |
| { |
| struct list_head *p; |
| snd_usb_stream_t *as; |
| snd_usb_substream_t *subs; |
| snd_pcm_t *pcm; |
| int err; |
| |
| list_for_each(p, &chip->pcm_list) { |
| as = list_entry(p, snd_usb_stream_t, list); |
| subs = &as->substream[stream]; |
| if (! subs->endpoint) |
| break; |
| if (subs->endpoint == fp->endpoint) { |
| list_add_tail(&fp->list, &subs->fmt_list); |
| subs->num_formats++; |
| subs->formats |= 1ULL << fp->format; |
| return 0; |
| } |
| } |
| /* look for an empty stream */ |
| list_for_each(p, &chip->pcm_list) { |
| as = list_entry(p, snd_usb_stream_t, list); |
| subs = &as->substream[stream]; |
| if (subs->endpoint) |
| continue; |
| err = snd_pcm_new_stream(as->pcm, stream, 1); |
| if (err < 0) |
| return err; |
| init_substream(as, stream, fp); |
| return 0; |
| } |
| |
| /* create a new pcm */ |
| as = snd_magic_kmalloc(snd_usb_stream_t, 0, GFP_KERNEL); |
| if (! as) |
| return -ENOMEM; |
| memset(as, 0, sizeof(*as)); |
| as->pcm_index = chip->pcm_devs; |
| as->chip = chip; |
| err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs, |
| stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0, |
| stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1, |
| &pcm); |
| if (err < 0) { |
| snd_magic_kfree(as); |
| return err; |
| } |
| as->pcm = pcm; |
| pcm->private_data = as; |
| pcm->private_free = snd_usb_audio_pcm_free; |
| pcm->info_flags = 0; |
| if (chip->pcm_devs > 0) |
| sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs); |
| else |
| strcpy(pcm->name, "USB Audio"); |
| |
| init_substream(as, stream, fp); |
| |
| list_add(&as->list, &chip->pcm_list); |
| chip->pcm_devs++; |
| |
| proc_pcm_format_add(as); |
| |
| return 0; |
| } |
| |
| |
| /* |
| * parse the audio format type descriptor |
| * and returns the corresponding pcm format |
| */ |
| static int parse_audio_format_type(struct usb_device *dev, int iface_no, int altno, |
| int format, unsigned char *fmt) |
| { |
| int format_type = fmt[3]; |
| int pcm_format; |
| |
| /* FIXME: needed support for TYPE II and III */ |
| if (format_type != USB_FORMAT_TYPE_I) { |
| snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n", |
| dev->devnum, iface_no, altno, format_type); |
| return -1; |
| } |
| |
| /* FIXME: correct endianess and sign? */ |
| pcm_format = -1; |
| switch (format) { |
| case 0: /* some devices don't define this correctly... */ |
| snd_printd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n", |
| dev->devnum, iface_no, altno); |
| /* fall-through */ |
| case USB_AUDIO_FORMAT_PCM: |
| /* check the format byte size */ |
| switch (fmt[6]) { |
| case 8: |
| pcm_format = SNDRV_PCM_FORMAT_U8; |
| break; |
| case 16: |
| pcm_format = SNDRV_PCM_FORMAT_S16_LE; |
| break; |
| case 18: |
| case 20: |
| if (fmt[5] == 3) |
| pcm_format = SNDRV_PCM_FORMAT_S24_3LE; |
| else |
| snd_printk(KERN_ERR "%d:%u:%d : non-supported sample bit %d in %d bytes\n", |
| dev->devnum, iface_no, altno, fmt[6], fmt[5]); |
| break; |
| case 24: |
| if (fmt[5] == 4) |
| /* FIXME: correct? or S32_LE? */ |
| pcm_format = SNDRV_PCM_FORMAT_S24_LE; |
| else if (fmt[5] == 3) |
| pcm_format = SNDRV_PCM_FORMAT_S24_3LE; |
| else |
| snd_printk(KERN_ERR "%d:%u:%d : non-supported sample bit %d in %d bytes\n", |
| dev->devnum, iface_no, altno, format, fmt[5]); |
| break; |
| case 32: |
| pcm_format = SNDRV_PCM_FORMAT_S32_LE; |
| break; |
| default: |
| snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n", |
| dev->devnum, iface_no, altno, fmt[6], fmt[5]); |
| break; |
| } |
| break; |
| case USB_AUDIO_FORMAT_PCM8: |
| /* Dallas DS4201 workaround */ |
| if (dev->descriptor.idVendor == 0x04fa && dev->descriptor.idProduct == 0x4201) |
| pcm_format = SNDRV_PCM_FORMAT_S8; |
| else |
| pcm_format = SNDRV_PCM_FORMAT_U8; |
| break; |
| case USB_AUDIO_FORMAT_IEEE_FLOAT: |
| pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE; |
| break; |
| case USB_AUDIO_FORMAT_ALAW: |
| pcm_format = SNDRV_PCM_FORMAT_A_LAW; |
| break; |
| case USB_AUDIO_FORMAT_MU_LAW: |
| pcm_format = SNDRV_PCM_FORMAT_MU_LAW; |
| break; |
| default: |
| snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n", |
| dev->devnum, iface_no, altno, format); |
| break; |
| } |
| return pcm_format; |
| } |
| |
| |
| static int parse_audio_endpoints(snd_usb_audio_t *chip, unsigned char *buffer, int buflen, int iface_no) |
| { |
| struct usb_device *dev; |
| struct usb_host_config *config; |
| struct usb_interface *iface; |
| struct usb_host_interface *alts; |
| struct usb_interface_descriptor *altsd; |
| int i, altno, err, stream; |
| int channels, nr_rates, pcm_format, format; |
| struct audioformat *fp; |
| unsigned char *fmt, *csep; |
| |
| dev = chip->dev; |
| config = dev->actconfig; |
| |
| /* parse the interface's altsettings */ |
| iface = &config->interface[iface_no]; |
| for (i = 0; i < iface->num_altsetting; i++) { |
| alts = &iface->altsetting[i]; |
| altsd = get_iface_desc(alts); |
| /* skip invalid one */ |
| if (altsd->bInterfaceClass != USB_CLASS_AUDIO || |
| altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING || |
| altsd->bNumEndpoints < 1) |
| continue; |
| /* must be isochronous */ |
| if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != |
| USB_ENDPOINT_XFER_ISOC) |
| continue; |
| /* check direction */ |
| stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ? |
| SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; |
| altno = altsd->bAlternateSetting; |
| |
| /* get audio formats */ |
| fmt = snd_usb_find_csint_desc(buffer, buflen, NULL, AS_GENERAL, iface_no, altno); |
| if (!fmt) { |
| snd_printk(KERN_ERR "%d:%u:%d : AS_GENERAL descriptor not found\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| if (fmt[0] < 7) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid AS_GENERAL desc\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| format = (fmt[6] << 8) | fmt[5]; /* remember the format value */ |
| |
| /* get format type */ |
| fmt = snd_usb_find_csint_desc(buffer, buflen, NULL, FORMAT_TYPE, iface_no, altno); |
| if (!fmt) { |
| snd_printk(KERN_ERR "%d:%u:%d : no FORMAT_TYPE desc\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| if (fmt[0] < 8) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| pcm_format = parse_audio_format_type(dev, iface_no, altno, format, fmt); |
| if (pcm_format < 0) |
| continue; |
| |
| channels = fmt[4]; |
| if (channels < 1) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n", |
| dev->devnum, iface_no, altno, channels); |
| continue; |
| } |
| |
| nr_rates = fmt[7]; |
| if (fmt[0] < 8 + 3 * (nr_rates ? nr_rates : 2)) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| csep = snd_usb_find_desc(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, iface_no, altno); |
| if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) { |
| snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| fp = kmalloc(sizeof(*fp), GFP_KERNEL); |
| if (! fp) { |
| snd_printk(KERN_ERR "cannot malloc\n"); |
| return -ENOMEM; |
| } |
| |
| memset(fp, 0, sizeof(*fp)); |
| fp->iface = iface_no; |
| fp->altsetting = altno; |
| fp->altset_idx = i; |
| fp->format = pcm_format; |
| fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress; |
| fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; |
| fp->channels = channels; |
| fp->attributes = csep[3]; |
| |
| if (nr_rates) { |
| /* |
| * build the rate table and bitmap flags |
| */ |
| int r, idx, c; |
| /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */ |
| static int conv_rates[] = { |
| 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, |
| 64000, 88200, 96000, 176400, 192000 |
| }; |
| fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL); |
| if (fp->rate_table == NULL) { |
| snd_printk(KERN_ERR "cannot malloc\n"); |
| kfree(fp); |
| break; |
| } |
| |
| fp->nr_rates = nr_rates; |
| fp->rate_min = fp->rate_max = combine_triple(&fmt[8]); |
| for (r = 0, idx = 8; r < nr_rates; r++, idx += 3) { |
| int rate = fp->rate_table[r] = combine_triple(&fmt[idx]); |
| if (rate < fp->rate_min) |
| fp->rate_min = rate; |
| else if (rate > fp->rate_max) |
| fp->rate_max = rate; |
| for (c = 0; c < 13; c++) { |
| if (rate == conv_rates[c]) { |
| fp->rates |= (1 << c); |
| break; |
| } |
| } |
| #if 0 // FIXME - we need to define constraint |
| if (c >= 13) |
| fp->rates |= SNDRV_PCM_KNOT; /* unconventional rate */ |
| #endif |
| } |
| |
| } else { |
| /* continuous rates */ |
| fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
| fp->rate_min = combine_triple(&fmt[8]); |
| fp->rate_max = combine_triple(&fmt[11]); |
| } |
| |
| |
| snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint); |
| err = add_audio_endpoint(chip, stream, fp); |
| if (err < 0) { |
| if (fp->rate_table) |
| kfree(fp->rate_table); |
| kfree(fp); |
| return err; |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * parse audio control descriptor and create pcm/midi streams |
| */ |
| static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif, |
| unsigned char *buffer, int buflen) |
| { |
| struct usb_device *dev = chip->dev; |
| struct usb_host_config *config; |
| struct usb_interface *iface; |
| unsigned char *p1; |
| int i, j; |
| |
| /* find audiocontrol interface */ |
| if (!(p1 = snd_usb_find_csint_desc(buffer, buflen, NULL, HEADER, ctrlif, -1))) { |
| snd_printk(KERN_ERR "cannot find HEADER\n"); |
| return -EINVAL; |
| } |
| if (! p1[7] || p1[0] < 8 + p1[7]) { |
| snd_printk(KERN_ERR "invalid HEADER\n"); |
| return -EINVAL; |
| } |
| |
| /* |
| * parse all USB audio streaming interfaces |
| */ |
| config = dev->actconfig; |
| for (i = 0; i < p1[7]; i++) { |
| struct usb_host_interface *alts; |
| struct usb_interface_descriptor *altsd; |
| j = p1[8 + i]; |
| if (j >= get_cfg_desc(config)->bNumInterfaces) { |
| snd_printk(KERN_ERR "%d:%u:%d : does not exist\n", |
| dev->devnum, ctrlif, j); |
| continue; |
| } |
| iface = &config->interface[j]; |
| if (usb_interface_claimed(iface)) { |
| snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", dev->devnum, ctrlif, j); |
| continue; |
| } |
| alts = &iface->altsetting[0]; |
| altsd = get_iface_desc(alts); |
| if (altsd->bInterfaceClass == USB_CLASS_AUDIO && |
| altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) { |
| if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) { |
| snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j); |
| continue; |
| } |
| usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1); |
| continue; |
| } |
| if (altsd->bInterfaceClass != USB_CLASS_AUDIO || |
| altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING) { |
| snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", dev->devnum, ctrlif, j, altsd->bInterfaceClass); |
| /* skip non-supported classes */ |
| continue; |
| } |
| parse_audio_endpoints(chip, buffer, buflen, j); |
| usb_set_interface(dev, j, 0); /* reset the current interface */ |
| usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1); |
| } |
| |
| return 0; |
| } |
| |
| static int snd_usb_roland_ua100_hack_intf(snd_usb_audio_t *chip, int ifnum) |
| { |
| struct audioformat *fp; |
| int err; |
| |
| fp = kmalloc(sizeof(*fp), GFP_KERNEL); |
| if (! fp) { |
| snd_printk(KERN_ERR "cannot malloc\n"); |
| return -ENOMEM; |
| } |
| memset(fp, 0, sizeof(*fp)); |
| fp->format = SNDRV_PCM_FORMAT_S16_LE; |
| fp->channels = ifnum == 0 ? 4 : 2; |
| fp->iface = ifnum; |
| fp->altsetting = 1; |
| fp->altset_idx = 1; |
| fp->attributes = ifnum == 0 ? 0 : EP_CS_ATTR_FILL_MAX; |
| fp->endpoint = ifnum == 0 ? 0x01 : 0x81; |
| fp->ep_attr = ifnum == 0 ? 0x09 : 0x05; |
| fp->rates = SNDRV_PCM_RATE_CONTINUOUS; |
| fp->rate_min = fp->rate_max = 44100; |
| |
| err = add_audio_endpoint(chip, ifnum == 0 ? SNDRV_PCM_STREAM_PLAYBACK |
| : SNDRV_PCM_STREAM_CAPTURE, fp); |
| if (err < 0) { |
| kfree(fp); |
| return err; |
| } |
| usb_set_interface(chip->dev, ifnum, 0); |
| return 0; |
| } |
| |
| static int snd_usb_roland_ua100_hack(snd_usb_audio_t *chip) |
| { |
| static const snd_usb_midi_endpoint_info_t ep_quirk = { |
| .epnum = -1, |
| .out_cables = 0x0007, |
| .in_cables = 0x0007 |
| }; |
| static const snd_usb_audio_quirk_t midi_quirk = { |
| .vendor_name = "Roland", |
| .product_name = "UA-100", |
| .ifnum = 2, |
| .type = QUIRK_MIDI_FIXED_ENDPOINT, |
| .data = &ep_quirk |
| }; |
| struct usb_host_config *cfg = chip->dev->actconfig; |
| struct usb_interface *iface; |
| int err; |
| |
| if (get_cfg_desc(cfg)->bNumInterfaces != 3) { |
| snd_printdd(KERN_ERR "invalid UA-100 descriptor\n"); |
| return -ENXIO; |
| } |
| /* if 0: output */ |
| if ((err = snd_usb_roland_ua100_hack_intf(chip, 0)) < 0) |
| return err; |
| /* if 1: input */ |
| iface = &cfg->interface[1]; |
| if (! usb_interface_claimed(iface)) { |
| if ((err = snd_usb_roland_ua100_hack_intf(chip, 1)) < 0) |
| return err; |
| usb_driver_claim_interface(&usb_audio_driver, iface, (void*)-1); |
| } |
| /* if 2: MIDI */ |
| iface = &cfg->interface[2]; |
| if (! usb_interface_claimed(iface)) { |
| if ((err = snd_usb_create_midi_interface(chip, iface, &midi_quirk)) < 0) |
| return err; |
| usb_driver_claim_interface(&usb_audio_driver, iface, (void*)-1); |
| } |
| return 0; |
| } |
| |
| static int snd_usb_create_quirk(snd_usb_audio_t *chip, |
| struct usb_interface *iface, |
| const snd_usb_audio_quirk_t *quirk) |
| { |
| switch (quirk->type) { |
| case QUIRK_MIDI_FIXED_ENDPOINT: |
| case QUIRK_MIDI_YAMAHA: |
| case QUIRK_MIDI_MIDIMAN: |
| return snd_usb_create_midi_interface(chip, iface, quirk); |
| case QUIRK_ROLAND_UA100: |
| return snd_usb_roland_ua100_hack(chip); |
| default: |
| snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type); |
| return -ENXIO; |
| } |
| } |
| |
| |
| /* |
| * free the chip instance |
| * |
| * here we have to do not much, since pcm and controls are already freed |
| * |
| */ |
| |
| static int snd_usb_audio_free(snd_usb_audio_t *chip) |
| { |
| down(®ister_mutex); |
| usb_chip[chip->index] = NULL; |
| up(®ister_mutex); |
| snd_magic_kfree(chip); |
| return 0; |
| } |
| |
| static int snd_usb_audio_dev_free(snd_device_t *device) |
| { |
| snd_usb_audio_t *chip = snd_magic_cast(snd_usb_audio_t, device->device_data, return -ENXIO); |
| return snd_usb_audio_free(chip); |
| } |
| |
| |
| /* |
| * create a chip instance and set its names. |
| */ |
| static int snd_usb_audio_create(snd_card_t *card, struct usb_device *dev, |
| const snd_usb_audio_quirk_t *quirk, |
| snd_usb_audio_t **rchip) |
| { |
| snd_usb_audio_t *chip; |
| int err, len; |
| static snd_device_ops_t ops = { |
| .dev_free = snd_usb_audio_dev_free, |
| }; |
| |
| *rchip = NULL; |
| chip = snd_magic_kcalloc(snd_usb_audio_t, 0, GFP_KERNEL); |
| if (! chip) |
| return -ENOMEM; |
| |
| chip->dev = dev; |
| chip->card = card; |
| INIT_LIST_HEAD(&chip->pcm_list); |
| |
| if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { |
| snd_usb_audio_free(chip); |
| return err; |
| } |
| |
| strcpy(card->driver, "USB-Audio"); |
| |
| /* retrieve the device string as shortname */ |
| if (dev->descriptor.iProduct) |
| len = usb_string(dev, dev->descriptor.iProduct, |
| card->shortname, sizeof(card->shortname)); |
| else |
| len = 0; |
| if (len <= 0) { |
| if (quirk && quirk->product_name) { |
| strncpy(card->shortname, quirk->product_name, sizeof(card->shortname) - 1); |
| card->shortname[sizeof(card->shortname) - 1] = '\0'; |
| } else { |
| sprintf(card->shortname, "USB Device %#04x:%#04x", |
| dev->descriptor.idVendor, dev->descriptor.idProduct); |
| } |
| } |
| |
| /* retrieve the vendor and device strings as longname */ |
| if (dev->descriptor.iManufacturer) |
| len = usb_string(dev, dev->descriptor.iManufacturer, |
| card->longname, sizeof(card->longname) - 1); |
| else |
| len = 0; |
| if (len <= 0) { |
| if (quirk && quirk->vendor_name) { |
| strncpy(card->longname, quirk->vendor_name, sizeof(card->longname) - 2); |
| card->longname[sizeof(card->longname) - 2] = '\0'; |
| len = strlen(card->longname); |
| } else { |
| len = 0; |
| } |
| } |
| if (len > 0) { |
| card->longname[len] = ' '; |
| len++; |
| } |
| card->longname[len] = '\0'; |
| if ((!dev->descriptor.iProduct |
| || usb_string(dev, dev->descriptor.iProduct, |
| card->longname + len, sizeof(card->longname) - len) <= 0) |
| && quirk && quirk->product_name) { |
| strncpy(card->longname + len, quirk->product_name, sizeof(card->longname) - len - 1); |
| card->longname[sizeof(card->longname) - 1] = '\0'; |
| } |
| |
| *rchip = chip; |
| return 0; |
| } |
| |
| |
| /* |
| * allocate and get description buffer |
| * must be freed later. |
| */ |
| static int alloc_desc_buffer(struct usb_device *dev, int index, unsigned char **bufptr) |
| { |
| int err, buflen; |
| unsigned char buf[8]; |
| unsigned char *buffer; |
| |
| *bufptr = 0; |
| err = usb_get_descriptor(dev, USB_DT_CONFIG, index, buf, 8); |
| if (err < 0) { |
| snd_printk(KERN_ERR "%d:%d: cannot get first 8 bytes\n", index, dev->devnum); |
| return err; |
| } |
| if (buf[1] != USB_DT_CONFIG || buf[0] < 9) { |
| snd_printk(KERN_ERR "%d:%d: invalid config desc\n", index, dev->devnum); |
| return -EINVAL; |
| } |
| buflen = combine_word(&buf[2]); |
| if (!(buffer = kmalloc(buflen, GFP_KERNEL))) { |
| snd_printk(KERN_ERR "cannot malloc descriptor (size = %d)\n", buflen); |
| return -ENOMEM; |
| } |
| err = usb_get_descriptor(dev, USB_DT_CONFIG, index, buffer, buflen); |
| if (err < 0) { |
| snd_printk(KERN_ERR "%d:%d: cannot get DT_CONFIG: error %d\n", index, dev->devnum, err); |
| kfree(buffer); |
| return err; |
| } |
| *bufptr = buffer; |
| return buflen; |
| } |
| |
| |
| /* |
| * probe the active usb device |
| * |
| * note that this can be called multiple times per a device, when it |
| * includes multiple audio control interfaces. |
| * |
| * thus we check the usb device pointer and creates the card instance |
| * only at the first time. the successive calls of this function will |
| * append the pcm interface to the corresponding card. |
| */ |
| static void *snd_usb_audio_probe(struct usb_device *dev, |
| struct usb_interface *intf, |
| const struct usb_device_id *usb_id) |
| { |
| struct usb_host_config *config = dev->actconfig; |
| const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info; |
| int i; |
| snd_card_t *card; |
| snd_usb_audio_t *chip; |
| struct usb_host_interface *alts; |
| int ifnum; |
| |
| alts = &intf->altsetting[0]; |
| ifnum = get_iface_desc(alts)->bInterfaceNumber; |
| |
| if (quirk && quirk->ifnum != QUIRK_ANY_INTERFACE && ifnum != quirk->ifnum) |
| goto __err_val; |
| |
| if (usb_set_configuration(dev, get_cfg_desc(config)->bConfigurationValue) < 0) { |
| snd_printk(KERN_ERR "cannot set configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue); |
| goto __err_val; |
| } |
| |
| /* |
| * found a config. now register to ALSA |
| */ |
| |
| /* check whether it's already registered */ |
| chip = NULL; |
| down(®ister_mutex); |
| for (i = 0; i < SNDRV_CARDS; i++) { |
| if (usb_chip[i] && usb_chip[i]->dev == dev) { |
| chip = usb_chip[i]; |
| if (chip->shutdown) { |
| snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n"); |
| goto __error; |
| } |
| break; |
| } |
| } |
| if (! chip) { |
| /* it's a fresh one. |
| * now look for an empty slot and create a new card instance |
| */ |
| for (i = 0; i < SNDRV_CARDS; i++) |
| if (enable[i] && ! usb_chip[i] && |
| (vid[i] == -1 || vid[i] == dev->descriptor.idVendor) && |
| (pid[i] == -1 || pid[i] == dev->descriptor.idProduct)) { |
| card = snd_card_new(index[i], id[i], THIS_MODULE, 0); |
| if (card == NULL) { |
| snd_printk(KERN_ERR "cannot create a card instance %d\n", i); |
| goto __error; |
| } |
| if (snd_usb_audio_create(card, dev, quirk, &chip) < 0) { |
| snd_card_free(card); |
| goto __error; |
| } |
| chip->index = i; |
| usb_chip[i] = chip; |
| break; |
| } |
| if (! chip) { |
| snd_printk(KERN_ERR "no available usb audio device\n"); |
| goto __error; |
| } |
| } |
| |
| if (!quirk) { |
| /* USB audio interface */ |
| unsigned char *buffer; |
| unsigned int index; |
| int buflen; |
| |
| index = dev->actconfig - config; |
| buflen = alloc_desc_buffer(dev, index, &buffer); |
| if (buflen <= 0) |
| goto __error; |
| if (snd_usb_create_streams(chip, ifnum, buffer, buflen) < 0 || |
| snd_usb_create_mixer(chip, ifnum, buffer, buflen) < 0) { |
| kfree(buffer); |
| goto __error; |
| } |
| kfree(buffer); |
| } else { |
| /* USB midi interface */ |
| if (snd_usb_create_quirk(chip, intf, quirk) < 0) |
| goto __error; |
| } |
| |
| /* we are allowed to call snd_card_register() many times */ |
| if (snd_card_register(chip->card) < 0) { |
| if (! chip->num_interfaces) |
| snd_card_free(chip->card); |
| goto __error; |
| } |
| |
| chip->num_interfaces++; |
| up(®ister_mutex); |
| return chip; |
| |
| __error: |
| up(®ister_mutex); |
| __err_val: |
| return NULL; |
| } |
| |
| /* |
| * we need to take care of counter, since disconnection can be called also |
| * many times as well as usb_audio_probe(). |
| */ |
| static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr) |
| { |
| snd_usb_audio_t *chip; |
| snd_card_t *card; |
| struct list_head *p; |
| |
| if (ptr == (void *)-1) |
| return; |
| |
| chip = snd_magic_cast(snd_usb_audio_t, ptr, return); |
| card = chip->card; |
| down(®ister_mutex); |
| chip->shutdown = 1; |
| chip->num_interfaces--; |
| if (chip->num_interfaces <= 0) { |
| snd_card_disconnect(card); |
| /* release the pcm resources */ |
| list_for_each(p, &chip->pcm_list) { |
| snd_usb_stream_t *as; |
| int idx; |
| as = list_entry(p, snd_usb_stream_t, list); |
| for (idx = 0; idx < 2; idx++) { |
| snd_usb_substream_t *subs; |
| subs = &as->substream[idx]; |
| if (!subs->num_formats) |
| continue; |
| release_substream_urbs(subs); |
| } |
| } |
| up(®ister_mutex); |
| snd_card_free_in_thread(card); |
| } else { |
| up(®ister_mutex); |
| } |
| } |
| |
| |
| #ifdef OLD_USB |
| |
| /* |
| * 2.4 USB kernel API |
| */ |
| static void *usb_audio_probe(struct usb_device *dev, unsigned int ifnum, |
| const struct usb_device_id *id) |
| { |
| return snd_usb_audio_probe(dev, usb_ifnum_to_if(dev, ifnum), id); |
| } |
| |
| static void usb_audio_disconnect(struct usb_device *dev, void *ptr) |
| { |
| snd_usb_audio_disconnect(dev, ptr); |
| } |
| |
| #else |
| |
| /* |
| * new 2.5 USB kernel API |
| */ |
| static int usb_audio_probe(struct usb_interface *intf, |
| const struct usb_device_id *id) |
| { |
| void *chip; |
| chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id); |
| if (chip) { |
| usb_set_intfdata(intf, chip); |
| return 0; |
| } else |
| return -EIO; |
| } |
| |
| static void usb_audio_disconnect(struct usb_interface *intf) |
| { |
| snd_usb_audio_disconnect(interface_to_usbdev(intf), |
| usb_get_intfdata(intf)); |
| } |
| #endif |
| |
| |
| |
| static int __init snd_usb_audio_init(void) |
| { |
| usb_register(&usb_audio_driver); |
| return 0; |
| } |
| |
| |
| static void __exit snd_usb_audio_cleanup(void) |
| { |
| usb_deregister(&usb_audio_driver); |
| } |
| |
| module_init(snd_usb_audio_init); |
| module_exit(snd_usb_audio_cleanup); |
| |
| #ifndef MODULE |
| /* |
| * format is snd-usb-audio=enable,index,id,vid,pid |
| */ |
| static int __init snd_usb_audio_module_setup(char* str) |
| { |
| static unsigned __initdata nr_dev = 0; |
| |
| if (nr_dev >= SNDRV_CARDS) |
| return 0; |
| (void)(get_option(&str, &enable[nr_dev]) == 2 && |
| get_option(&str, &index[nr_dev]) == 2 && |
| get_id(&str, &id[nr_dev]) == 2 && |
| get_option(&str, &vid[nr_dev]) == 2 && |
| get_option(&str, &pid[nr_dev]) == 2); |
| ++nr_dev; |
| return 1; |
| } |
| |
| __setup("snd-usb-audio=", snd_usb_audio_module_setup); |
| |
| #endif /* !MODULE */ |