diff options
Diffstat (limited to 'sound/usb/usbaudio.c')
| -rw-r--r-- | sound/usb/usbaudio.c | 3337 |
1 files changed, 3337 insertions, 0 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c new file mode 100644 index 00000000000..84b0bbddbd2 --- /dev/null +++ b/sound/usb/usbaudio.c @@ -0,0 +1,3337 @@ +/* + * (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 + * + * + * NOTES: + * + * - async unlink should be used for avoiding the sleep inside lock. + * 2.4.22 usb-uhci seems buggy for async unlinking and results in + * oops. in such a cse, pass async_unlink=0 option. + * - the linked URBs would be preferred but not used so far because of + * the instability of unlinking. + * - type II is not supported properly. there is no device which supports + * this type *correctly*. SB extigy looks as if it supports, but it's + * indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream). + */ + + +#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 <linux/moduleparam.h> +#include <sound/core.h> +#include <sound/info.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/initval.h> + +#include "usbaudio.h" + + +MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>"); +MODULE_DESCRIPTION("USB Audio"); +MODULE_LICENSE("GPL"); +MODULE_SUPPORTED_DEVICE("{{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 */ +static int nrpacks = 4; /* max. number of packets per urb */ +static int async_unlink = 1; + +module_param_array(index, int, NULL, 0444); +MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); +module_param_array(id, charp, NULL, 0444); +MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); +module_param_array(enable, bool, NULL, 0444); +MODULE_PARM_DESC(enable, "Enable USB audio adapter."); +module_param_array(vid, int, NULL, 0444); +MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); +module_param_array(pid, int, NULL, 0444); +MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); +module_param(nrpacks, int, 0444); +MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB."); +module_param(async_unlink, bool, 0444); +MODULE_PARM_DESC(async_unlink, "Use async unlink mode."); + + +/* + * debug the h/w constraints + */ +/* #define HW_CONST_DEBUG */ + + +/* + * + */ + +#define MAX_PACKS 10 +#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */ +#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 */ + unsigned int channels; /* # channels */ + unsigned int fmt_type; /* USB audio format type (1-3) */ + unsigned int frame_size; /* samples per frame for non-audio */ + 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 maxpacksize; /* max. packet size */ + unsigned int rates; /* rate bitmasks */ + unsigned int rate_min, rate_max; /* min/max rates */ + unsigned int nr_rates; /* number of rate table entries */ + unsigned 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 */ + struct audioformat *cur_audiofmt; /* current audioformat pointer (for hw_params callback) */ + unsigned int cur_rate; /* current rate (for hw_params callback) */ + unsigned int period_bytes; /* current period bytes (for hw_params callback) */ + 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 fs/fps in Q16.16 format */ + unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */ + 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 fmt_type; /* USB audio format type (1-3) */ + + unsigned int running: 1; /* running status */ + + unsigned int hwptr; /* free frame position in the buffer (only for playback) */ + unsigned int hwptr_done; /* processed frame position in the buffer */ + unsigned int transfer_sched; /* scheduled frames since last period (for playback) */ + unsigned 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 */ + + unsigned 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 * MAX_PACKS * 4]; /* sync buffer; it's so small - let's get static */ + char *tmpbuf; /* temporary buffer for playback */ + + u64 formats; /* format bitmasks (all or'ed) */ + unsigned 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; + unsigned int fmt_type; /* USB audio format type (1-3) */ + snd_usb_substream_t substream[2]; + struct list_head list; +}; + + +/* + * 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 our full speed format (fs/1000 in Q16.16) + * this will overflow at approx 524 kHz + */ +inline static unsigned get_usb_full_speed_rate(unsigned int rate) +{ + return ((rate << 13) + 62) / 125; +} + +/* + * convert a sampling rate into USB high speed format (fs/8000 in Q16.16) + * this will overflow at approx 4 MHz + */ +inline static unsigned get_usb_high_speed_rate(unsigned int rate) +{ + return ((rate << 10) + 62) / 125; +} + +/* convert our full speed USB rate into sampling rate in Hz */ +inline static unsigned get_full_speed_hz(unsigned int usb_rate) +{ + return (usb_rate * 125 + (1 << 12)) >> 13; +} + +/* convert our high speed USB rate into sampling rate in Hz */ +inline static unsigned get_high_speed_hz(unsigned int usb_rate) +{ + return (usb_rate * 125 + (1 << 9)) >> 10; +} + + +/* + * prepare urb for full speed 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 += 4, cp += 4) { + urb->iso_frame_desc[i].length = 3; + urb->iso_frame_desc[i].offset = offs; + cp[0] = subs->freqn >> 2; + cp[1] = subs->freqn >> 10; + cp[2] = subs->freqn >> 18; + } + return 0; +} + +/* + * prepare urb for high speed capture sync pipe + * + * fill the length and offset of each urb descriptor. + * the fixed 12.13 frequency is passed as 16.16 through the pipe. + */ +static int prepare_capture_sync_urb_hs(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 += 4, cp += 4) { + urb->iso_frame_desc[i].length = 4; + urb->iso_frame_desc[i].offset = offs; + cp[0] = subs->freqn; + cp[1] = subs->freqn >> 8; + cp[2] = subs->freqn >> 16; + cp[3] = subs->freqn >> 24; + } + 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; +#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 i; + unsigned int stride, 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) { + unsigned int cnt = runtime->buffer_size - oldptr; + unsigned 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 full speed 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 += 4) { + urb->iso_frame_desc[i].length = 3; + urb->iso_frame_desc[i].offset = offs; + } + return 0; +} + +/* + * prepare urb for high speed playback sync pipe + * + * set up the offset and length to receive the current frequency. + */ + +static int prepare_playback_sync_urb_hs(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 += 4) { + urb->iso_frame_desc[i].length = 4; + urb->iso_frame_desc[i].offset = offs; + } + return 0; +} + +/* + * process after full speed 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) +{ + int i; + unsigned int f, found; + unsigned char *cp = urb->transfer_buffer; + unsigned long flags; + + found = 0; + for (i = 0; i < urb->number_of_packets; i++, cp += 4) { + if (urb->iso_frame_desc[i].status || + urb->iso_frame_desc[i].actual_length < 3) + continue; + f = combine_triple(cp) << 2; +#if 0 + if (f < subs->freqn - (subs->freqn>>3) || f > subs->freqmax) { + snd_printd(KERN_WARNING "requested frequency %d (%u,%03uHz) out of range (current nominal %d (%u,%03uHz))\n", + f, f >> 14, (f & ((1 << 14) - 1) * 1000) / ((1 << 14) - 1), + subs->freqn, subs->freqn >> 14, (subs->freqn & ((1 << 14) - 1) * 1000) / ((1 << 14) - 1)); + continue; + } +#endif + found = f; + } + if (found) { + spin_lock_irqsave(&subs->lock, flags); + subs->freqm = found; + spin_unlock_irqrestore(&subs->lock, flags); + } + + return 0; +} + +/* + * process after high speed playback sync complete + * + * retrieve the current 12.13 frequency from pipe, and set it. + * the value is referred in prepare_playback_urb(). + */ +static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs, + snd_pcm_runtime_t *runtime, + struct urb *urb) +{ + int i; + unsigned int found; + unsigned char *cp = urb->transfer_buffer; + unsigned long flags; + + found = 0; + for (i = 0; i < urb->number_of_packets; i++, cp += 4) { + if (urb->iso_frame_desc[i].status || + urb->iso_frame_desc[i].actual_length < 4) + continue; + found = combine_quad(cp) & 0x0fffffff; + } + 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; + unsigned 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 & 0xffff) + subs->freqm; + counts = subs->phase >> 16; + 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; + if (subs->fmt_type == USB_FORMAT_TYPE_II) { + if (subs->transfer_sched > 0) { + /* FIXME: fill-max mode is not supported yet */ + offs -= subs->transfer_sched; + counts -= subs->transfer_sched; + urb->iso_frame_desc[i].length = counts * stride; + subs->transfer_sched = 0; + } + i++; + if (i < ctx->packets) { + /* add a transfer delimiter */ + urb->iso_frame_desc[i].offset = offs * stride; + urb->iso_frame_desc[i].length = 0; + urb->number_of_packets++; + } + } + 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, + }, +}; + +static struct snd_urb_ops audio_urb_ops_high_speed[2] = { + { + .prepare = prepare_playback_urb, + .retire = retire_playback_urb, + .prepare_sync = prepare_playback_sync_urb_hs, + .retire_sync = retire_playback_sync_urb_hs, + }, + { + .prepare = prepare_capture_urb, + .retire = retire_capture_urb, + .prepare_sync = prepare_capture_sync_urb_hs, + .retire_sync = retire_capture_sync_urb, + }, +}; + +/* + * complete callback from data urb + */ +static void snd_complete_urb(struct urb *urb, struct pt_regs *regs) +{ + 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 = 0; + + if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) || + ! subs->running || /* can be stopped during retire callback */ + (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 || + (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { + clear_bit(ctx->index, &subs->active_mask); + if (err < 0) { + snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err); + snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); + } + } +} + + +/* + * complete callback from sync urb + */ +static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs) +{ + 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 = 0; + + if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) || + ! subs->running || /* can be stopped during retire callback */ + (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 || + (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { + clear_bit(ctx->index + 16, &subs->active_mask); + if (err < 0) { + snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err); + snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); + } + } +} + + +/* + * unlink active urbs. + */ +static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep) +{ + unsigned int i; + int async; + + subs->running = 0; + + if (!force && subs->stream->chip->shutdown) /* to be sure... */ + return -EBADFD; + + async = !can_sleep && async_unlink; + + if (! async && in_interrupt()) + return 0; + + for (i = 0; i < subs->nurbs; i++) { + if (test_bit(i, &subs->active_mask)) { + if (! test_and_set_bit(i, &subs->unlink_mask)) { + struct urb *u = subs->dataurb[i].urb; + if (async) { + u->transfer_flags |= URB_ASYNC_UNLINK; + usb_unlink_urb(u); + } else + usb_kill_urb(u); + } + } + } + if (subs->syncpipe) { + for (i = 0; i < SYNC_URBS; i++) { + if (test_bit(i+16, &subs->active_mask)) { + if (! test_and_set_bit(i+16, &subs->unlink_mask)) { + struct urb *u = subs->syncurb[i].urb; + if (async) { + u->transfer_flags |= URB_ASYNC_UNLINK; + usb_unlink_urb(u); + } else + usb_kill_urb(u); + } + } + } + } + return 0; +} + + +/* + * set up and start data/sync urbs + */ +static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime) +{ + unsigned int i; + int err; + + if (subs->stream->chip->shutdown) + return -EBADFD; + + 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->active_mask = 0; + subs->unlink_mask = 0; + subs->running = 1; + for (i = 0; i < subs->nurbs; i++) { + if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 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_ATOMIC)) < 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, 0, 0); + return -EPIPE; +} + + +/* + * wait until all urbs are processed. + */ +static int wait_clear_urbs(snd_usb_substream_t *subs) +{ + int timeout = HZ; + unsigned int i; + int 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); + } 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, 0, 0); + 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 = NULL; + } + if (u->buf) { + kfree(u->buf); + u->buf = NULL; + } +} + +/* + * release a substream + */ +static void release_substream_urbs(snd_usb_substream_t *subs, int force) +{ + int i; + + /* stop urbs (to be sure) */ + deactivate_urbs(subs, force, 1); + 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 = NULL; + } + subs->nurbs = 0; +} + +/* + * initialize a substream for plaback/capture + */ +static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes, + unsigned int rate, unsigned int frame_bits) +{ + unsigned int maxsize, n, i; + int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; + unsigned int npacks[MAX_URBS], urb_packs, total_packs; + + /* calculate the frequency in 16.16 format */ + if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) + subs->freqn = get_usb_full_speed_rate(rate); + else + subs->freqn = get_usb_high_speed_rate(rate); + subs->freqm = subs->freqn; + subs->freqmax = subs->freqn + (subs->freqn >> 2); /* max. allowed frequency */ + subs->phase = 0; + + /* calculate the max. size of packet */ + maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3)) >> 16; + 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; + + if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) + urb_packs = nrpacks; + else + urb_packs = nrpacks * 8; + + /* allocate a temporary buffer for playback */ + if (is_playback) { + subs->tmpbuf = kmalloc(maxsize * urb_packs, GFP_KERNEL); + if (! subs->tmpbuf) { + snd_printk(KERN_ERR "cannot malloc tmpbuf\n"); + return -ENOMEM; + } + } + + /* decide how many packets to be used */ + total_packs = (period_bytes + maxsize - 1) / maxsize; + if (total_packs < 2 * MIN_PACKS_URB) + total_packs = 2 * MIN_PACKS_URB; + subs->nurbs = (total_packs + urb_packs - 1) / urb_packs; + if (subs->nurbs > MAX_URBS) { + /* too much... */ + subs->nurbs = MAX_URBS; + total_packs = MAX_URBS * urb_packs; + } + n = total_packs; + for (i = 0; i < subs->nurbs; i++) { + npacks[i] = n > urb_packs ? urb_packs : n; + n -= urb_packs; + } + 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 (subs->fmt_type == USB_FORMAT_TYPE_II) + u->packets++; /* for transfer delimiter */ + if (! is_playback) { + /* allocate a capture buffer per urb */ + u->buf = kmalloc(maxsize * u->packets, GFP_KERNEL); + if (! u->buf) { + release_substream_urbs(subs, 0); + return -ENOMEM; + } + } + u->urb = usb_alloc_urb(u->packets, GFP_KERNEL); + if (! u->urb) { + release_substream_urbs(subs, 0); + return -ENOMEM; + } + u->urb->dev = subs->dev; + u->urb->pipe = subs->datapipe; + u->urb->transfer_flags = URB_ISO_ASAP; + u->urb->number_of_packets = u->packets; + u->urb->interval = 1; + u->urb->context = u; + u->urb->complete = snd_usb_complete_callback(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, 0); + return -ENOMEM; + } + u->urb->transfer_buffer = subs->syncbuf + i * nrpacks * 4; + u->urb->transfer_buffer_length = nrpacks * 4; + u->urb->dev = subs->dev; + u->urb->pipe = subs->syncpipe; + u->urb->transfer_flags = URB_ISO_ASAP; + u->urb->number_of_packets = u->packets; + if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) + u->urb->interval = 8; + else + u->urb->interval = 1; + u->urb->context = u; + u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb); + } + } + return 0; +} + + +/* + * find a matching audio format + */ +static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format, + unsigned int rate, unsigned int channels) +{ + struct list_head *p; + struct audioformat *found = NULL; + int cur_attr = 0, attr; + + list_for_each(p, &subs->fmt_list) { + struct audioformat *fp; + fp = list_entry(p, struct audioformat, list); + if (fp->format != format || fp->channels != channels) + continue; + if (rate < fp->rate_min || rate > fp->rate_max) + continue; + if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) { + unsigned int i; + for (i = 0; i < fp->nr_rates; i++) + if (fp->rate_table[i] == rate) + break; + if (i >= fp->nr_rates) + continue; + } + attr = fp->ep_attr & EP_ATTR_MASK; + if (! found) { + found = fp; + cur_attr = attr; + continue; + } + /* avoid async out and adaptive in if the other method + * supports the same format. + * this is a workaround for the case like + * M-audio audiophile USB. + */ + if (attr != cur_attr) { + if ((attr == EP_ATTR_ASYNC && + subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || + (attr == EP_ATTR_ADAPTIVE && + subs->direction == SNDRV_PCM_STREAM_CAPTURE)) + continue; + if ((cur_attr == EP_ATTR_ASYNC && + subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || + (cur_attr == EP_ATTR_ADAPTIVE && + subs->direction == SNDRV_PCM_STREAM_CAPTURE)) { + found = fp; + cur_attr = attr; + continue; + } + } + /* find the format with the largest max. packet size */ + if (fp->maxpacksize > found->maxpacksize) { + found = fp; + cur_attr = attr; + } + } + return found; +} + + +/* + * initialize the picth control and sample rate + */ +static int init_usb_pitch(struct usb_device *dev, int iface, + struct usb_host_interface *alts, + struct audioformat *fmt) +{ + unsigned int ep; + unsigned char data[1]; + int err; + + 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 = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, + USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, + PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) { + snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH\n", + dev->devnum, iface, ep); + return err; + } + } + return 0; +} + +static int init_usb_sample_rate(struct usb_device *dev, int iface, + struct usb_host_interface *alts, + struct audioformat *fmt, int rate) +{ + unsigned int ep; + unsigned char data[3]; + int err; + + ep = get_endpoint(alts, 0)->bEndpointAddress; + /* if endpoint has sampling rate control, set it */ + if (fmt->attributes & EP_CS_ATTR_SAMPLE_RATE) { + int crate; + data[0] = rate; + data[1] = rate >> 8; + data[2] = rate >> 16; + if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, + USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, + SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) { + snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n", + dev->devnum, iface, fmt->altsetting, rate, ep); + return err; + } + if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, + USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN, + SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) { + snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n", + dev->devnum, iface, fmt->altsetting, ep); + return 0; /* some devices don't support reading */ + } + crate = data[0] | (data[1] << 8) | (data[2] << 16); + if (crate != rate) { + snd_printd(KERN_WARNING "current rate %d is different from the runtime rate %d\n", crate, rate); + // runtime->rate = crate; + } + } + return 0; +} + +/* + * find a matching format and set up the interface + */ +static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt) +{ + struct usb_device *dev = subs->dev; + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + struct usb_interface *iface; + unsigned int ep, attr; + int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; + int err; + + iface = usb_ifnum_to_if(dev, fmt->iface); + snd_assert(iface, return -EINVAL); + alts = &iface->altsetting[fmt->altset_idx]; + altsd = get_iface_desc(alts); + snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL); + + if (fmt == subs->cur_audiofmt) + return 0; + + /* 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->altsetting) < 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->altsetting); + subs->interface = fmt->iface; + subs->format = fmt->altset_idx; + } + + /* create a data pipe */ + ep = fmt->endpoint & 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 = fmt->maxpacksize; + subs->fill_max = 0; + + /* we need a sync pipe in async OUT or adaptive IN mode */ + /* check the number of EP, since some devices have broken + * descriptors which fool us. if it has only one EP, + * assume it as adaptive-out or sync-in. + */ + attr = fmt->ep_attr & EP_ATTR_MASK; + if (((is_playback && attr == EP_ATTR_ASYNC) || + (! is_playback && attr == EP_ATTR_ADAPTIVE)) && + altsd->bNumEndpoints >= 2) { + /* check sync-pipe endpoint */ + /* ... and check descriptor size before accessing bSynchAddress + because there is a version of the SB Audigy 2 NX firmware lacking + the audio fields in the endpoint descriptors */ + if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 || + (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && + 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 (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && + (( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || + (!is_playback && ep != (unsigned int)(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; + } + + /* always fill max packet size */ + if (fmt->attributes & EP_CS_ATTR_FILL_MAX) + subs->fill_max = 1; + + if ((err = init_usb_pitch(dev, subs->interface, alts, fmt)) < 0) + return err; + + subs->cur_audiofmt = fmt; + +#if 0 + printk("setting done: format = %d, rate = %d, channels = %d\n", + fmt->format, fmt->rate, fmt->channels); + printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n", + subs->datapipe, subs->syncpipe); +#endif + + return 0; +} + +/* + * hw_params callback + * + * allocate a buffer and set the given audio format. + * + * 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) +{ + snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data; + struct audioformat *fmt; + unsigned int channels, rate, format; + int ret, changed; + + ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); + if (ret < 0) + return ret; + + format = params_format(hw_params); + rate = params_rate(hw_params); + channels = params_channels(hw_params); + fmt = find_format(subs, format, rate, channels); + if (! fmt) { + snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n", + snd_pcm_format_name(format), rate, channels); + return -EINVAL; + } + + changed = subs->cur_audiofmt != fmt || + subs->period_bytes != params_period_bytes(hw_params) || + subs->cur_rate != rate; + if ((ret = set_format(subs, fmt)) < 0) + return ret; + + if (subs->cur_rate != rate) { + struct usb_host_interface *alts; + struct usb_interface *iface; + iface = usb_ifnum_to_if(subs->dev, fmt->iface); + alts = &iface->altsetting[fmt->altset_idx]; + ret = init_usb_sample_rate(subs->dev, subs->interface, alts, fmt, rate); + if (ret < 0) + return ret; + subs->cur_rate = rate; + } + + if (changed) { + /* format changed */ + release_substream_urbs(subs, 0); + /* influenced: period_bytes, channels, rate, format, */ + ret = init_substream_urbs(subs, params_period_bytes(hw_params), + params_rate(hw_params), + snd_pcm_format_physical_width(params_format(hw_params)) * params_channels(hw_params)); + } + + return ret; +} + +/* + * hw_free callback + * + * reset the audio format and release the buffer + */ +static int snd_usb_hw_free(snd_pcm_substream_t *substream) +{ + snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data; + + subs->cur_audiofmt = NULL; + subs->cur_rate = 0; + subs->period_bytes = 0; + release_substream_urbs(subs, 0); + return snd_pcm_lib_free_pages(substream); +} + +/* + * prepare callback + * + * only a few subtle things... + */ +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; + + if (! subs->cur_audiofmt) { + snd_printk(KERN_ERR "usbaudio: no format is specified!\n"); + return -ENXIO; + } + + /* some unit conversions in runtime */ + subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize); + subs->curframesize = bytes_to_frames(runtime, subs->curpacksize); + + /* reset the pointer */ + subs->hwptr = 0; + subs->hwptr_done = 0; + subs->transfer_sched = 0; + subs->transfer_done = 0; + subs->phase = 0; + + /* clear urbs (to be sure) */ + deactivate_urbs(subs, 0, 1); + wait_clear_urbs(subs); + + return 0; +} + +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, +}; + +/* + * h/w constraints + */ + +#ifdef HW_CONST_DEBUG +#define hwc_debug(fmt, args...) printk(KERN_DEBUG fmt, ##args) +#else +#define hwc_debug(fmt, args...) /**/ +#endif + +static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp) +{ + snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); + snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); + snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); + + /* check the format */ + if (! snd_mask_test(fmts, fp->format)) { + hwc_debug(" > check: no supported format %d\n", fp->format); + return 0; + } + /* check the channels */ + if (fp->channels < ct->min || fp->channels > ct->max) { + hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); + return 0; + } + /* check the rate is within the range */ + if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { + hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); + return 0; + } + if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { + hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); + return 0; + } + return 1; +} + +static int hw_rule_rate(snd_pcm_hw_params_t *params, + snd_pcm_hw_rule_t *rule) +{ + snd_usb_substream_t *subs = rule->private; + struct list_head *p; + snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); + unsigned int rmin, rmax; + int changed; + + hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); + changed = 0; + rmin = rmax = 0; + list_for_each(p, &subs->fmt_list) { + struct audioformat *fp; + fp = list_entry(p, struct audioformat, list); + if (! hw_check_valid_format(params, fp)) + continue; + if (changed++) { + if (rmin > fp->rate_min) + rmin = fp->rate_min; + if (rmax < fp->rate_max) + rmax = fp->rate_max; + } else { + rmin = fp->rate_min; + rmax = fp->rate_max; + } + } + + if (! changed) { + hwc_debug(" --> get empty\n"); + it->empty = 1; + return -EINVAL; + } + + changed = 0; + if (it->min < rmin) { + it->min = rmin; + it->openmin = 0; + changed = 1; + } + if (it->max > rmax) { + it->max = rmax; + it->openmax = 0; + changed = 1; + } + if (snd_interval_checkempty(it)) { + it->empty = 1; + return -EINVAL; + } + hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); + return changed; +} + + +static int hw_rule_channels(snd_pcm_hw_params_t *params, + snd_pcm_hw_rule_t *rule) +{ + snd_usb_substream_t *subs = rule->private; + struct list_head *p; + snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); + unsigned int rmin, rmax; + int changed; + + hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); + changed = 0; + rmin = rmax = 0; + list_for_each(p, &subs->fmt_list) { + struct audioformat *fp; + fp = list_entry(p, struct audioformat, list); + if (! hw_check_valid_format(params, fp)) + continue; + if (changed++) { + if (rmin > fp->channels) + rmin = fp->channels; + if (rmax < fp->channels) + rmax = fp->channels; + } else { + rmin = fp->channels; + rmax = fp->channels; + } + } + + if (! changed) { + hwc_debug(" --> get empty\n"); + it->empty = 1; + return -EINVAL; + } + + changed = 0; + if (it->min < rmin) { + it->min = rmin; + it->openmin = 0; + changed = 1; + } + if (it->max > rmax) { + it->max = rmax; + it->openmax = 0; + changed = 1; + } + if (snd_interval_checkempty(it)) { + it->empty = 1; + return -EINVAL; + } + hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); + return changed; +} + +static int hw_rule_format(snd_pcm_hw_params_t *params, + snd_pcm_hw_rule_t *rule) +{ + snd_usb_substream_t *subs = rule->private; + struct list_head *p; + snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); + u64 fbits; + u32 oldbits[2]; + int changed; + + hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); + fbits = 0; + list_for_each(p, &subs->fmt_list) { + struct audioformat *fp; + fp = list_entry(p, struct audioformat, list); + if (! hw_check_valid_format(params, fp)) + continue; + fbits |= (1ULL << fp->format); + } + + oldbits[0] = fmt->bits[0]; + oldbits[1] = fmt->bits[1]; + fmt->bits[0] &= (u32)fbits; + fmt->bits[1] &= (u32)(fbits >> 32); + if (! fmt->bits[0] && ! fmt->bits[1]) { + hwc_debug(" --> get empty\n"); + return -EINVAL; + } + changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); + hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); + return changed; +} + +#define MAX_MASK 64 + +/* + * check whether the registered audio formats need special hw-constraints + */ +static int check_hw_params_convention(snd_usb_substream_t *subs) +{ + int i; + u32 *channels; + u32 *rates; + u32 cmaster, rmaster; + u32 rate_min = 0, rate_max = 0; + struct list_head *p; + int err = 1; + + channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL); + rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL); + + list_for_each(p, &subs->fmt_list) { + struct audioformat *f; + f = list_entry(p, struct audioformat, list); + /* unconventional channels? */ + if (f->channels > 32) + goto __out; + /* continuous rate min/max matches? */ + if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) { + if (rate_min && f->rate_min != rate_min) + goto __out; + if (rate_max && f->rate_max != rate_max) + goto __out; + rate_min = f->rate_min; + rate_max = f->rate_max; + } + /* combination of continuous rates and fixed rates? */ + if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) { + if (f->rates != rates[f->format]) + goto __out; + } + if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) { + if (rates[f->format] && rates[f->format] != f->rates) + goto __out; + } + channels[f->format] |= (1 << f->channels); + rates[f->format] |= f->rates; + } + /* check whether channels and rates match for all formats */ + cmaster = rmaster = 0; + for (i = 0; i < MAX_MASK; i++) { + if (cmaster != channels[i] && cmaster && channels[i]) + goto __out; + if (rmaster != rates[i] && rmaster && rates[i]) + goto __out; + if (channels[i]) + cmaster = channels[i]; + if (rates[i]) + rmaster = rates[i]; + } + /* check whether channels match for all distinct rates */ + memset(channels, 0, MAX_MASK * sizeof(u32)); + list_for_each(p, &subs->fmt_list) { + struct audioformat *f; + f = list_entry(p, struct audioformat, list); + if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) + continue; + for (i = 0; i < 32; i++) { + if (f->rates & (1 << i)) + channels[i] |= (1 << f->channels); + } + } + cmaster = 0; + for (i = 0; i < 32; i++) { + if (cmaster != channels[i] && cmaster && channels[i]) + goto __out; + if (channels[i]) + cmaster = channels[i]; + } + err = 0; + + __out: + kfree(channels); + kfree(rates); + return err; +} + + +/* + * set up the runtime hardware information. + */ + +static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs) +{ + struct list_head *p; + int err; + + 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; + if (fp->fmt_type == USB_FORMAT_TYPE_II && fp->frame_size > 0) { + /* FIXME: there might be more than one audio formats... */ + runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = + fp->frame_size; + } + } + + /* 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); + + if (check_hw_params_convention(subs)) { + hwc_debug("setting extra hw constraints...\n"); + if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, + hw_rule_rate, subs, + SNDRV_PCM_HW_PARAM_FORMAT, + SNDRV_PCM_HW_PARAM_CHANNELS, + -1)) < 0) + return err; + if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, + hw_rule_channels, subs, + SNDRV_PCM_HW_PARAM_FORMAT, + SNDRV_PCM_HW_PARAM_RATE, + -1)) < 0) + return err; + if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, + hw_rule_format, subs, + SNDRV_PCM_HW_PARAM_RATE, + SNDRV_PCM_HW_PARAM_CHANNELS, + -1)) < 0) + return err; + } + return 0; +} + +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; + return setup_hw_info(runtime, subs); +} + +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]; + + if (subs->interface >= 0) { + usb_set_interface(subs->dev, subs->interface, 0); + subs->interface = -1; + } + 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. + */ +void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype) +{ + u8 *p, *end, *next; + + 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] == dtype && (!after || (void *)p > after)) { + 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) +{ + unsigned char *p = after; + + while ((p = snd_usb_find_desc(buffer, buflen, p, + USB_DT_CS_INTERFACE)) != NULL) { + if (p[0] >= 3 && p[2] == dsubtype) + return p; + } + return NULL; +} + +/* + * Wrapper for usb_control_msg(). + * Allocates a temp buffer to prevent dmaing from/to the stack. + */ +int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request, + __u8 requesttype, __u16 value, __u16 index, void *data, + __u16 size, int timeout) +{ + int err; + void *buf = NULL; + + if (size > 0) { + buf = kmalloc(size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + memcpy(buf, data, size); + } + err = usb_control_msg(dev, pipe, request, requesttype, + value, index, buf, size, timeout); + if (size > 0) { + memcpy(data, buf, size); + kfree(buf); + } + return err; +} + + +/* + * entry point for linux usb interface + */ + +static int usb_audio_probe(struct usb_interface *intf, + const struct usb_device_id *id); +static void usb_audio_disconnect(struct usb_interface *intf); + +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 = { + .owner = THIS_MODULE, + .name = "snd-usb-audio", + .probe = usb_audio_probe, + .disconnect = usb_audio_disconnect, + .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->altsetting); + 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 (continuous)\n", + fp->rate_min, fp->rate_max); + } else { + unsigned 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"); + } + // snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize); + // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes); + } +} + +static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer) +{ + if (subs->running) { + unsigned 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 = %u Hz\n", + snd_usb_get_speed(subs->dev) == USB_SPEED_FULL + ? get_full_speed_hz(subs->freqm) + : get_high_speed_hz(subs->freqm)); + } 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 = entry->private_data; + + 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 (! snd_card_proc_new(card, name, &entry)) + snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read); +} + + +/* + * initialize 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; + if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) + subs->ops = audio_urb_ops[stream]; + else + subs->ops = audio_urb_ops_high_speed[stream]; + snd_pcm_lib_preallocate_pages(as->pcm->streams[stream].substream, + SNDRV_DMA_TYPE_CONTINUOUS, + snd_dma_continuous_data(GFP_KERNEL), + 64 * 1024, 128 * 1024); + 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++; + subs->fmt_type = fp->fmt_type; +} + + +/* + * 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); + kfree(fp->rate_table); + kfree(fp); + } +} + + +/* + * free a usb stream instance + */ +static void snd_usb_audio_stream_free(snd_usb_stream_t *stream) +{ + free_substream(&stream->substream[0]); + free_substream(&stream->substream[1]); + list_del(&stream->list); + 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); + if (as->fmt_type != fp->fmt_type) + continue; + subs = &as->substream[stream]; + if (! subs->endpoint) + continue; + 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); + if (as->fmt_type != fp->fmt_type) + continue; + 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 = kmalloc(sizeof(*as), GFP_KERNEL); + if (! as) + return -ENOMEM; + memset(as, 0, sizeof(*as)); + as->pcm_index = chip->pcm_devs; + as->chip = chip; + as->fmt_type = fp->fmt_type; + 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) { + 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; +} + + +/* + * check if the device uses big-endian samples + */ +static int is_big_endian_format(struct usb_device *dev, struct audioformat *fp) +{ + /* M-Audio */ + if (le16_to_cpu(dev->descriptor.idVendor) == 0x0763) { + /* Quattro: captured data only */ + if (le16_to_cpu(dev->descriptor.idProduct) == 0x2001 && + fp->endpoint & USB_DIR_IN) + return 1; + /* Audiophile USB */ + if (le16_to_cpu(dev->descriptor.idProduct) == 0x2003) + return 1; + } + return 0; +} + +/* + * parse the audio format type I descriptor + * and returns the corresponding pcm format + * + * @dev: usb device + * @fp: audioformat record + * @format: the format tag (wFormatTag) + * @fmt: the format type descriptor + */ +static int parse_audio_format_i_type(struct usb_device *dev, struct audioformat *fp, + int format, unsigned char *fmt) +{ + int pcm_format; + int sample_width, sample_bytes; + + /* FIXME: correct endianess and sign? */ + pcm_format = -1; + sample_width = fmt[6]; + sample_bytes = fmt[5]; + switch (format) { + case 0: /* some devices don't define this correctly... */ + snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n", + dev->devnum, fp->iface, fp->altsetting); + /* fall-through */ + case USB_AUDIO_FORMAT_PCM: + if (sample_width > sample_bytes * 8) { + snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n", + dev->devnum, fp->iface, fp->altsetting, + sample_width, sample_bytes); + } + /* check the format byte size */ + switch (fmt[5]) { + case 1: + pcm_format = SNDRV_PCM_FORMAT_S8; + break; + case 2: + if (is_big_endian_format(dev, fp)) + pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */ + else + pcm_format = SNDRV_PCM_FORMAT_S16_LE; + break; + case 3: + if (is_big_endian_format(dev, fp)) + pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */ + else + pcm_format = SNDRV_PCM_FORMAT_S24_3LE; + break; + case 4: + 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, fp->iface, fp->altsetting, sample_width, sample_bytes); + break; + } + break; + case USB_AUDIO_FORMAT_PCM8: + /* Dallas DS4201 workaround */ + if (le16_to_cpu(dev->descriptor.idVendor) == 0x04fa && + le16_to_cpu(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, fp->iface, fp->altsetting, format); + break; + } + return pcm_format; +} + + +/* + * parse the format descriptor and stores the possible sample rates + * on the audioformat table. + * + * @dev: usb device + * @fp: audioformat record + * @fmt: the format descriptor + * @offset: the start offset of descriptor pointing the rate type + * (7 for type I and II, 8 for type II) + */ +static int parse_audio_format_rates(struct usb_device *dev, struct audioformat *fp, + unsigned char *fmt, int offset) +{ + int nr_rates = fmt[offset]; + if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) { + snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n", + dev->devnum, fp->iface, fp->altsetting); + return -1; + } + + 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 unsigned 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"); + return -1; + } + + fp->nr_rates = nr_rates; + fp->rate_min = fp->rate_max = combine_triple(&fmt[8]); + for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { + unsigned 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 < (int)ARRAY_SIZE(conv_rates); c++) { + if (rate == conv_rates[c]) { + fp->rates |= (1 << c); + break; + } + } + } + } else { + /* continuous rates */ + fp->rates = SNDRV_PCM_RATE_CONTINUOUS; + fp->rate_min = combine_triple(&fmt[offset + 1]); + fp->rate_max = combine_triple(&fmt[offset + 4]); + } + return 0; +} + +/* + * parse the format type I and III descriptors + */ +static int parse_audio_format_i(struct usb_device *dev, struct audioformat *fp, + int format, unsigned char *fmt) +{ + int pcm_format; + + if (fmt[3] == USB_FORMAT_TYPE_III) { + /* FIXME: the format type is really IECxxx + * but we give normal PCM format to get the existing + * apps working... + */ + pcm_format = SNDRV_PCM_FORMAT_S16_LE; + } else { + pcm_format = parse_audio_format_i_type(dev, fp, format, fmt); + if (pcm_format < 0) + return -1; + } + fp->format = pcm_format; + fp->channels = fmt[4]; + if (fp->channels < 1) { + snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n", + dev->devnum, fp->iface, fp->altsetting, fp->channels); + return -1; + } + return parse_audio_format_rates(dev, fp, fmt, 7); +} + +/* + * prase the format type II descriptor + */ +static int parse_audio_format_ii(struct usb_device *dev, struct audioformat *fp, + int format, unsigned char *fmt) +{ + int brate, framesize; + switch (format) { + case USB_AUDIO_FORMAT_AC3: + /* FIXME: there is no AC3 format defined yet */ + // fp->format = SNDRV_PCM_FORMAT_AC3; + fp->format = SNDRV_PCM_FORMAT_U8; /* temporarily hack to receive byte streams */ + break; + case USB_AUDIO_FORMAT_MPEG: + fp->format = SNDRV_PCM_FORMAT_MPEG; + break; + default: + snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n", + dev->devnum, fp->iface, fp->altsetting, format); + fp->format = SNDRV_PCM_FORMAT_MPEG; + break; + } + fp->channels = 1; + brate = combine_word(&fmt[4]); /* fmt[4,5] : wMaxBitRate (in kbps) */ + framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */ + snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize); + fp->frame_size = framesize; + return parse_audio_format_rates(dev, fp, fmt, 8); /* fmt[8..] sample rates */ +} + +static int parse_audio_format(struct usb_device *dev, struct audioformat *fp, + int format, unsigned char *fmt, int stream) +{ + int err; + + switch (fmt[3]) { + case USB_FORMAT_TYPE_I: + case USB_FORMAT_TYPE_III: + err = parse_audio_format_i(dev, fp, format, fmt); + break; + case USB_FORMAT_TYPE_II: + err = parse_audio_format_ii(dev, fp, format, fmt); + break; + default: + snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n", + dev->devnum, fp->iface, fp->altsetting, fmt[3]); + return -1; + } + fp->fmt_type = fmt[3]; + if (err < 0) + return err; +#if 1 + /* FIXME: temporary hack for extigy */ + /* extigy apparently supports sample rates other than 48k + * but not in ordinary way. so we enable only 48k atm. + */ + if (le16_to_cpu(dev->descriptor.idVendor) == 0x041e && + le16_to_cpu(dev->descriptor.idProduct) == 0x3000) { + if (fmt[3] == USB_FORMAT_TYPE_I && + stream == SNDRV_PCM_STREAM_PLAYBACK && + fp->rates != SNDRV_PCM_RATE_48000) + return -1; /* use 48k only */ + } +#endif + return 0; +} + +static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no) +{ + struct usb_device *dev; + struct usb_interface *iface; + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + int i, altno, err, stream; + int format; + struct audioformat *fp; + unsigned char *fmt, *csep; + + dev = chip->dev; + + /* parse the interface's altsettings */ + iface = usb_ifnum_to_if(dev, 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->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || + (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIO_STREAMING && + altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) || + altsd->bNumEndpoints < 1 || + le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0) + 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(alts->extra, alts->extralen, NULL, AS_GENERAL); + 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(alts->extra, alts->extralen, NULL, FORMAT_TYPE); + 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; + } + + csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT); + /* Creamware Noah has this descriptor after the 2nd endpoint */ + if (!csep && altsd->bNumEndpoints >= 2) + csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT); + 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->endpoint = get_endpoint(alts, 0)->bEndpointAddress; + fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; + /* FIXME: decode wMaxPacketSize of high bandwith endpoints */ + fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); + fp->attributes = csep[3]; + + /* some quirks for attributes here */ + + /* workaround for AudioTrak Optoplay */ + if (le16_to_cpu(dev->descriptor.idVendor) == 0x0a92 && + le16_to_cpu(dev->descriptor.idProduct) == 0x0053) { + /* Optoplay sets the sample rate attribute although + * it seems not supporting it in fact. + */ + fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE; + } + + /* workaround for M-Audio Audiophile USB */ + if (le16_to_cpu(dev->descriptor.idVendor) == 0x0763 && + le16_to_cpu(dev->descriptor.idProduct) == 0x2003) { + /* doesn't set the sample rate attribute, but supports it */ + fp->attributes |= EP_CS_ATTR_SAMPLE_RATE; + } + + /* + * plantronics headset and Griffin iMic have set adaptive-in + * although it's really not... + */ + if ((le16_to_cpu(dev->descriptor.idVendor) == 0x047f && + le16_to_cpu(dev->descriptor.idProduct) == 0x0ca1) || + /* Griffin iMic (note that there is an older model 77d:223) */ + (le16_to_cpu(dev->descriptor.idVendor) == 0x077d && + le16_to_cpu(dev->descriptor.idProduct) == 0x07af)) { + fp->ep_attr &= ~EP_ATTR_MASK; + if (stream == SNDRV_PCM_STREAM_PLAYBACK) + fp->ep_attr |= EP_ATTR_ADAPTIVE; + else + fp->ep_attr |= EP_ATTR_SYNC; + } + + /* ok, let's parse further... */ + if (parse_audio_format(dev, fp, format, fmt, stream) < 0) { + kfree(fp->rate_table); + kfree(fp); + continue; + } + + 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) { + kfree(fp->rate_table); + kfree(fp); + return err; + } + /* try to set the interface... */ + usb_set_interface(chip->dev, iface_no, altno); + init_usb_pitch(chip->dev, iface_no, alts, fp); + init_usb_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max); + } + return 0; +} + + +/* + * disconnect streams + * called from snd_usb_audio_disconnect() + */ +static void snd_usb_stream_disconnect(struct list_head *head, struct usb_driver *driver) +{ + int idx; + snd_usb_stream_t *as; + snd_usb_substream_t *subs; + + as = list_entry(head, snd_usb_stream_t, list); + for (idx = 0; idx < 2; idx++) { + subs = &as->substream[idx]; + if (!subs->num_formats) + return; + release_substream_urbs(subs, 1); + subs->interface = -1; + } +} + +/* + * parse audio control descriptor and create pcm/midi streams + */ +static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif) +{ + struct usb_device *dev = chip->dev; + struct usb_host_interface *host_iface; + struct usb_interface *iface; + unsigned char *p1; + int i, j; + + /* find audiocontrol interface */ + host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; + if (!(p1 = snd_usb_find_csint_desc(host_iface->extra, host_iface->extralen, NULL, HEADER))) { + 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 + */ + for (i = 0; i < p1[7]; i++) { + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + j = p1[8 + i]; + iface = usb_ifnum_to_if(dev, j); + if (!iface) { + snd_printk(KERN_ERR "%d:%u:%d : does not exist\n", + dev->devnum, ctrlif, j); + continue; + } + 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->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && + 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 *)-1L); + continue; + } + if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && + altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || + 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; + } + if (! parse_audio_endpoints(chip, j)) { + usb_set_interface(dev, j, 0); /* reset the current interface */ + usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); + } + } + + return 0; +} + +/* + * create a stream for an endpoint/altsetting without proper descriptors + */ +static int create_fixed_stream_quirk(snd_usb_audio_t *chip, + struct usb_interface *iface, + const snd_usb_audio_quirk_t *quirk) +{ + struct audioformat *fp; + struct usb_host_interface *alts; + int stream, err; + int *rate_table = NULL; + + fp = kmalloc(sizeof(*fp), GFP_KERNEL); + if (! fp) { + snd_printk(KERN_ERR "cannot malloc\n"); + return -ENOMEM; + } + memcpy(fp, quirk->data, sizeof(*fp)); + if (fp->nr_rates > 0) { + rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL); + if (!rate_table) { + kfree(fp); + return -ENOMEM; + } + memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates); + fp->rate_table = rate_table; + } + + stream = (fp->endpoint & USB_DIR_IN) + ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; + err = add_audio_endpoint(chip, stream, fp); + if (err < 0) { + kfree(fp); + kfree(rate_table); + return err; + } + if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber || + fp->altset_idx >= iface->num_altsetting) { + kfree(fp); + kfree(rate_table); + return -EINVAL; + } + alts = &iface->altsetting[fp->altset_idx]; + usb_set_interface(chip->dev, fp->iface, 0); + init_usb_pitch(chip->dev, fp->iface, alts, fp); + init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max); + return 0; +} + +/* + * create a stream for an interface with proper descriptors + */ +static int create_standard_interface_quirk(snd_usb_audio_t *chip, + struct usb_interface *iface, + const snd_usb_audio_quirk_t *quirk) +{ + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + int err; + + alts = &iface->altsetting[0]; + altsd = get_iface_desc(alts); + switch (quirk->type) { + case QUIRK_AUDIO_STANDARD_INTERFACE: + err = parse_audio_endpoints(chip, altsd->bInterfaceNumber); + if (!err) + usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0); /* reset the current interface */ + break; + case QUIRK_MIDI_STANDARD_INTERFACE: + err = snd_usb_create_midi_interface(chip, iface, NULL); + break; + default: + snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type); + return -ENXIO; + } + if (err < 0) { + snd_printk(KERN_ERR "cannot setup if %d: error %d\n", + altsd->bInterfaceNumber, err); + return err; + } + return 0; +} + +/* + * Create a stream for an Edirol UA-700/UA-25 interface. The only way + * to detect the sample rate is by looking at wMaxPacketSize. + */ +static int create_ua700_ua25_quirk(snd_usb_audio_t *chip, + struct usb_interface *iface) +{ + static const struct audioformat ua_format = { + .format = SNDRV_PCM_FORMAT_S24_3LE, + .channels = 2, + .fmt_type = USB_FORMAT_TYPE_I, + .altsetting = 1, + .altset_idx = 1, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + }; + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + struct audioformat *fp; + int stream, err; + + /* both PCM and MIDI interfaces have 2 altsettings */ + if (iface->num_altsetting != 2) + return -ENXIO; + alts = &iface->altsetting[1]; + altsd = get_iface_desc(alts); + + if (altsd->bNumEndpoints == 2) { + static const snd_usb_midi_endpoint_info_t ua700_ep = { + .out_cables = 0x0003, + .in_cables = 0x0003 + }; + static const snd_usb_audio_quirk_t ua700_quirk = { + .type = QUIRK_MIDI_FIXED_ENDPOINT, + .data = &ua700_ep + }; + static const snd_usb_midi_endpoint_info_t ua25_ep = { + .out_cables = 0x0001, + .in_cables = 0x0001 + }; + static const snd_usb_audio_quirk_t ua25_quirk = { + .type = QUIRK_MIDI_FIXED_ENDPOINT, + .data = &ua25_ep + }; + if (le16_to_cpu(chip->dev->descriptor.idProduct) == 0x002b) + return snd_usb_create_midi_interface(chip, iface, + &ua700_quirk); + else + return snd_usb_create_midi_interface(chip, iface, + &ua25_quirk); + } + + if (altsd->bNumEndpoints != 1) + return -ENXIO; + + fp = kmalloc(sizeof(*fp), GFP_KERNEL); + if (!fp) + return -ENOMEM; + memcpy(fp, &ua_format, sizeof(*fp)); + + fp->iface = altsd->bInterfaceNumber; + fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress; + fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; + fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); + + switch (fp->maxpacksize) { + case 0x120: + fp->rate_max = fp->rate_min = 44100; + break; + case 0x138: + case 0x140: + fp->rate_max = fp->rate_min = 48000; + break; + case 0x258: + case 0x260: + fp->rate_max = fp->rate_min = 96000; + break; + default: + snd_printk(KERN_ERR "unknown sample rate\n"); + kfree(fp); + return -ENXIO; + } + + stream = (fp->endpoint & USB_DIR_IN) + ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; + err = add_audio_endpoint(chip, stream, fp); + if (err < 0) { + kfree(fp); + return err; + } + usb_set_interface(chip->dev, fp->iface, 0); + return 0; +} + +/* + * Create a stream for an Edirol UA-1000 interface. + */ +static int create_ua1000_quirk(snd_usb_audio_t *chip, struct usb_interface *iface) +{ + static const struct audioformat ua1000_format = { + .format = SNDRV_PCM_FORMAT_S32_LE, + .fmt_type = USB_FORMAT_TYPE_I, + .altsetting = 1, + .altset_idx = 1, + .attributes = 0, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + }; + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + struct audioformat *fp; + int stream, err; + + if (iface->num_altsetting != 2) + return -ENXIO; + alts = &iface->altsetting[1]; + altsd = get_iface_desc(alts); + if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE || + altsd->bNumEndpoints != 1) + return -ENXIO; + + fp = kmalloc(sizeof(*fp), GFP_KERNEL); + if (!fp) + return -ENOMEM; + memcpy(fp, &ua1000_format, sizeof(*fp)); + + fp->channels = alts->extra[4]; + fp->iface = altsd->bInterfaceNumber; + fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress; + fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; + fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); + fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]); + + stream = (fp->endpoint & USB_DIR_IN) + ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK; + err = add_audio_endpoint(chip, stream, fp); + if (err < 0) { + kfree(fp); + return err; + } + /* FIXME: playback must be synchronized to capture */ + usb_set_interface(chip->dev, fp->iface, 0); + return 0; +} + +static int snd_usb_create_quirk(snd_usb_audio_t *chip, + struct usb_interface *iface, + const snd_usb_audio_quirk_t *quirk); + +/* + * handle the quirks for the contained interfaces + */ +static int create_composite_quirk(snd_usb_audio_t *chip, + struct usb_interface *iface, + const snd_usb_audio_quirk_t *quirk) +{ + int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber; + int err; + + for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) { + iface = usb_ifnum_to_if(chip->dev, quirk->ifnum); + if (!iface) + continue; + if (quirk->ifnum != probed_ifnum && + usb_interface_claimed(iface)) + continue; + err = snd_usb_create_quirk(chip, iface, quirk); + if (err < 0) + return err; + if (quirk->ifnum != probed_ifnum) + usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); + } + return 0; +} + + +/* + * boot quirks + */ + +#define EXTIGY_FIRMWARE_SIZE_OLD 794 +#define EXTIGY_FIRMWARE_SIZE_NEW 483 + +static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf) +{ + struct usb_host_config *config = dev->actconfig; + int err; + + if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD || + le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) { + snd_printdd("sending Extigy boot sequence...\n"); + /* Send message to force it to reconnect with full interface. */ + err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0), + 0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000); + if (err < 0) snd_printdd("error sending boot message: %d\n", err); + err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, + &dev->descriptor, sizeof(dev->descriptor)); + config = dev->actconfig; + if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err); + err = usb_reset_configuration(dev); + if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err); + snd_printdd("extigy_boot: new boot length = %d\n", + le16_to_cpu(get_cfg_desc(config)->wTotalLength)); + return -ENODEV; /* quit this anyway */ + } + return 0; +} + + +/* + * audio-interface quirks + * + * returns zero if no standard audio/MIDI parsing is needed. + * returns a postive value if standard audio/midi interfaces are parsed + * after this. + * returns a negative value at error. + */ +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: + case QUIRK_MIDI_NOVATION: + case QUIRK_MIDI_MOTU: + case QUIRK_MIDI_EMAGIC: + return snd_usb_create_midi_interface(chip, iface, quirk); + case QUIRK_COMPOSITE: + return create_composite_quirk(chip, iface, quirk); + case QUIRK_AUDIO_FIXED_ENDPOINT: + return create_fixed_stream_quirk(chip, iface, quirk); + case QUIRK_AUDIO_STANDARD_INTERFACE: + case QUIRK_MIDI_STANDARD_INTERFACE: + return create_standard_interface_quirk(chip, iface, quirk); + case QUIRK_AUDIO_EDIROL_UA700_UA25: + return create_ua700_ua25_quirk(chip, iface); + case QUIRK_AUDIO_EDIROL_UA1000: + return create_ua1000_quirk(chip, iface); + case QUIRK_IGNORE_INTERFACE: + return 0; + default: + snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type); + return -ENXIO; + } +} + + +/* + * common proc files to show the usb device info + */ +static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) +{ + snd_usb_audio_t *chip = entry->private_data; + if (! chip->shutdown) + snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum); +} + +static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer) +{ + snd_usb_audio_t *chip = entry->private_data; + if (! chip->shutdown) + snd_iprintf(buffer, "%04x:%04x\n", + le16_to_cpu(chip->dev->descriptor.idVendor), + le16_to_cpu(chip->dev->descriptor.idProduct)); +} + +static void snd_usb_audio_create_proc(snd_usb_audio_t *chip) +{ + snd_info_entry_t *entry; + if (! snd_card_proc_new(chip->card, "usbbus", &entry)) + snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read); + if (! snd_card_proc_new(chip->card, "usbid", &entry)) + snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read); +} + +/* + * 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) +{ + kfree(chip); + return 0; +} + +static int snd_usb_audio_dev_free(snd_device_t *device) +{ + snd_usb_audio_t *chip = device->device_data; + return snd_usb_audio_free(chip); +} + + +/* + * create a chip instance and set its names. + */ +static int snd_usb_audio_create(struct usb_device *dev, int idx, + const snd_usb_audio_quirk_t *quirk, + snd_usb_audio_t **rchip) +{ + snd_card_t *card; + snd_usb_audio_t *chip; + int err, len; + char component[14]; + static snd_device_ops_t ops = { + .dev_free = snd_usb_audio_dev_free, + }; + + *rchip = NULL; + + if (snd_usb_get_speed(dev) != USB_SPEED_FULL && + snd_usb_get_speed(dev) != USB_SPEED_HIGH) { + snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev)); + return -ENXIO; + } + + card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0); + if (card == NULL) { + snd_printk(KERN_ERR "cannot create card instance %d\n", idx); + return -ENOMEM; + } + + chip = kcalloc(1, sizeof(*chip), GFP_KERNEL); + if (! chip) { + snd_card_free(card); + return -ENOMEM; + } + + chip->index = idx; + chip->dev = dev; + chip->card = card; + INIT_LIST_HEAD(&chip->pcm_list); + INIT_LIST_HEAD(&chip->midi_list); + + if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) { + snd_usb_audio_free(chip); + snd_card_free(card); + return err; + } + + strcpy(card->driver, "USB-Audio"); + sprintf(component, "USB%04x:%04x", + le16_to_cpu(dev->descriptor.idVendor), + le16_to_cpu(dev->descriptor.idProduct)); + snd_component_add(card, component); + + /* retrieve the device string as shortname */ + if (quirk && quirk->product_name) { + strlcpy(card->shortname, quirk->product_name, sizeof(card->shortname)); + } else { + if (!dev->descriptor.iProduct || + usb_string(dev, dev->descriptor.iProduct, + card->shortname, sizeof(card->shortname)) <= 0) { + /* no name available from anywhere, so use ID */ + sprintf(card->shortname, "USB Device %#04x:%#04x", + le16_to_cpu(dev->descriptor.idVendor), + le16_to_cpu(dev->descriptor.idProduct)); + } + } + + /* retrieve the vendor and device strings as longname */ + if (quirk && quirk->vendor_name) { + len = strlcpy(card->longname, quirk->vendor_name, sizeof(card->longname)); + } else { + if (dev->descriptor.iManufacturer) + len = usb_string(dev, dev->descriptor.iManufacturer, + card->longname, sizeof(card->longname)); + else + len = 0; + /* we don't really care if there isn't any vendor string */ + } + if (len > 0) + strlcat(card->longname, " ", sizeof(card->longname)); + + strlcat(card->longname, card->shortname, sizeof(card->longname)); + + len = strlcat(card->longname, " at ", sizeof(card->longname)); + + if (len < sizeof(card->longname)) + usb_make_path(dev, card->longname + len, sizeof(card->longname) - len); + + strlcat(card->longname, + snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed", + sizeof(card->longname)); + + snd_usb_audio_create_proc(chip); + + snd_card_set_dev(card, &dev->dev); + + *rchip = chip; + return 0; +} + + +/* + * 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, err; + 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 >= 0 && ifnum != quirk->ifnum) + goto __err_val; + + /* SB Extigy needs special boot-up sequence */ + /* if more models come, this will go to the quirk list. */ + if (le16_to_cpu(dev->descriptor.idVendor) == 0x041e && + le16_to_cpu(dev->descriptor.idProduct) == 0x3000) { + if (snd_usb_extigy_boot_quirk(dev, intf) < 0) + goto __err_val; + config = dev->actconfig; + } + + /* + * 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) { + if (usb_chip[i]->shutdown) { + snd_printk(KERN_ERR "USB device is in the shutdown state, cannot create a card instance\n"); + goto __error; + } + chip = usb_chip[i]; + break; + } + } + if (! chip) { + /* it's a fresh one. + * now look for an empty slot and create a new card instance + */ + /* first, set the current configuration for this device */ + if (usb_reset_configuration(dev) < 0) { + snd_printk(KERN_ERR "cannot reset configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue); + goto __error; + } + for (i = 0; i < SNDRV_CARDS; i++) + if (enable[i] && ! usb_chip[i] && + (vid[i] == -1 || vid[i] == le16_to_cpu(dev->descriptor.idVendor)) && + (pid[i] == -1 || pid[i] == le16_to_cpu(dev->descriptor.idProduct))) { + if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) { + goto __error; + } + break; + } + if (! chip) { + snd_printk(KERN_ERR "no available usb audio device\n"); + goto __error; + } + } + + err = 1; /* continue */ + if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { + /* need some special handlings */ + if ((err = snd_usb_create_quirk(chip, intf, quirk)) < 0) + goto __error; + } + + if (err > 0) { + /* create normal USB audio interfaces */ + if (snd_usb_create_streams(chip, ifnum) < 0 || + snd_usb_create_mixer(chip, ifnum) < 0) { + goto __error; + } + } + + /* we are allowed to call snd_card_register() many times */ + if (snd_card_register(chip->card) < 0) { + goto __error; + } + + usb_chip[chip->index] = chip; + chip->num_interfaces++; + up(®ister_mutex); + return chip; + + __error: + if (chip && !chip->num_interfaces) + snd_card_free(chip->card); + 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 *)-1L) + return; + + chip = ptr; + 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_disconnect(p, &usb_audio_driver); + } + /* release the midi resources */ + list_for_each(p, &chip->midi_list) { + snd_usbmidi_disconnect(p, &usb_audio_driver); + } + usb_chip[chip->index] = NULL; + up(®ister_mutex); + snd_card_free_in_thread(card); + } else { + up(®ister_mutex); + } +} + +/* + * 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) { + dev_set_drvdata(&intf->dev, chip); + return 0; + } else + return -EIO; +} + +static void usb_audio_disconnect(struct usb_interface *intf) +{ + snd_usb_audio_disconnect(interface_to_usbdev(intf), + dev_get_drvdata(&intf->dev)); +} + + +static int __init snd_usb_audio_init(void) +{ + if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) { + printk(KERN_WARNING "invalid nrpacks value.\n"); + return -EINVAL; + } + 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); |