| /* |
| * (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/interrupt.h> |
| #include <linux/list.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/usb.h> |
| #include <linux/vmalloc.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, 0644); |
| 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 8 |
| #define SYNC_URBS 4 /* always four 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; |
| unsigned int buffer_size; /* size of data buffer, if data URB */ |
| snd_usb_substream_t *subs; |
| int index; /* index for urb array */ |
| int packets; /* number of packets per urb */ |
| }; |
| |
| 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 datainterval; /* log_2 of data packet interval */ |
| 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 packs_per_ms; /* packets per millisecond (for playback) */ |
| |
| unsigned int running: 1; /* running status */ |
| |
| unsigned int hwptr_done; /* processed frame position in the buffer */ |
| 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 buffer for all sync URBs */ |
| dma_addr_t sync_dma; /* DMA address of syncbuf */ |
| |
| 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 tasklet_struct start_period_elapsed; /* for start trigger */ |
| |
| 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 |
| */ |
| static inline 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 |
| */ |
| static inline 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 */ |
| static inline 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 */ |
| static inline 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; |
| |
| urb->dev = ctx->subs->dev; /* we need to set this at each time */ |
| urb->iso_frame_desc[0].length = 3; |
| urb->iso_frame_desc[0].offset = 0; |
| 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; |
| |
| urb->dev = ctx->subs->dev; /* we need to set this at each time */ |
| urb->iso_frame_desc[0].length = 4; |
| urb->iso_frame_desc[0].offset = 0; |
| 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; |
| 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 */ |
| 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->transfer_buffer_length = offs; |
| urb->number_of_packets = ctx->packets; |
| #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; |
| int period_elapsed = 0; |
| |
| 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; |
| if (subs->transfer_done >= runtime->period_size) { |
| subs->transfer_done -= runtime->period_size; |
| period_elapsed = 1; |
| } |
| 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); |
| } |
| } |
| if (period_elapsed) |
| snd_pcm_period_elapsed(subs->pcm_substream); |
| 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) |
| { |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| |
| urb->dev = ctx->subs->dev; /* we need to set this at each time */ |
| urb->iso_frame_desc[0].length = 3; |
| urb->iso_frame_desc[0].offset = 0; |
| 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) |
| { |
| snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; |
| |
| urb->dev = ctx->subs->dev; /* we need to set this at each time */ |
| urb->iso_frame_desc[0].length = 4; |
| urb->iso_frame_desc[0].offset = 0; |
| 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) |
| { |
| unsigned int f; |
| unsigned long flags; |
| |
| if (urb->iso_frame_desc[0].status == 0 && |
| urb->iso_frame_desc[0].actual_length == 3) { |
| f = combine_triple((u8*)urb->transfer_buffer) << 2; |
| if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) { |
| spin_lock_irqsave(&subs->lock, flags); |
| subs->freqm = f; |
| 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) |
| { |
| unsigned int f; |
| unsigned long flags; |
| |
| if (urb->iso_frame_desc[0].status == 0 && |
| urb->iso_frame_desc[0].actual_length == 4) { |
| f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff; |
| if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) { |
| spin_lock_irqsave(&subs->lock, flags); |
| subs->freqm = f; |
| spin_unlock_irqrestore(&subs->lock, flags); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * prepare urb for playback data pipe |
| * |
| * Since a URB can handle only a single linear buffer, we must use double |
| * buffering when the data to be transferred overflows the buffer boundary. |
| * To avoid inconsistencies when updating hwptr_done, we use double buffering |
| * for all URBs. |
| */ |
| 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; |
| int period_elapsed = 0; |
| 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 << subs->datainterval); |
| 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_done += counts; |
| if (subs->transfer_done >= runtime->period_size) { |
| subs->transfer_done -= runtime->period_size; |
| period_elapsed = 1; |
| if (subs->fmt_type == USB_FORMAT_TYPE_II) { |
| if (subs->transfer_done > 0) { |
| /* FIXME: fill-max mode is not |
| * supported yet */ |
| offs -= subs->transfer_done; |
| counts -= subs->transfer_done; |
| urb->iso_frame_desc[i].length = |
| counts * stride; |
| subs->transfer_done = 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; |
| } |
| } |
| /* finish at the frame boundary at/after the period boundary */ |
| if (period_elapsed && |
| (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1) |
| break; |
| } |
| if (subs->hwptr_done + offs > runtime->buffer_size) { |
| /* err, the transferred area goes over buffer boundary. */ |
| unsigned int len = runtime->buffer_size - subs->hwptr_done; |
| memcpy(urb->transfer_buffer, |
| runtime->dma_area + subs->hwptr_done * stride, |
| len * stride); |
| memcpy(urb->transfer_buffer + len * stride, |
| runtime->dma_area, |
| (offs - len) * stride); |
| } else { |
| memcpy(urb->transfer_buffer, |
| runtime->dma_area + subs->hwptr_done * stride, |
| offs * stride); |
| } |
| subs->hwptr_done += offs; |
| if (subs->hwptr_done >= runtime->buffer_size) |
| subs->hwptr_done -= runtime->buffer_size; |
| spin_unlock_irqrestore(&subs->lock, flags); |
| urb->transfer_buffer_length = offs * stride; |
| if (period_elapsed) { |
| if (likely(subs->running)) |
| snd_pcm_period_elapsed(subs->pcm_substream); |
| else |
| tasklet_hi_schedule(&subs->start_period_elapsed); |
| } |
| return 0; |
| } |
| |
| /* |
| * process after playback data complete |
| * - nothing to do |
| */ |
| static int retire_playback_urb(snd_usb_substream_t *subs, |
| snd_pcm_runtime_t *runtime, |
| struct urb *urb) |
| { |
| return 0; |
| } |
| |
| /* |
| * Delay the snd_pcm_period_elapsed() call until after the start trigger |
| * callback so that we're not longer in the substream's lock. |
| */ |
| static void start_period_elapsed(unsigned long data) |
| { |
| snd_usb_substream_t *subs = (snd_usb_substream_t *)data; |
| snd_pcm_period_elapsed(subs->pcm_substream); |
| } |
| |
| |
| /* |
| */ |
| 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); |
| } |
| } |
| } |
| |
| |
| /* get the physical page pointer at the given offset */ |
| static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs, |
| unsigned long offset) |
| { |
| void *pageptr = subs->runtime->dma_area + offset; |
| return vmalloc_to_page(pageptr); |
| } |
| |
| /* allocate virtual buffer; may be called more than once */ |
| static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size) |
| { |
| snd_pcm_runtime_t *runtime = subs->runtime; |
| if (runtime->dma_area) { |
| if (runtime->dma_bytes >= size) |
| return 0; /* already large enough */ |
| vfree_nocheck(runtime->dma_area); |
| } |
| runtime->dma_area = vmalloc_nocheck(size); |
| if (! runtime->dma_area) |
| return -ENOMEM; |
| runtime->dma_bytes = size; |
| return 0; |
| } |
| |
| /* free virtual buffer; may be called more than once */ |
| static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs) |
| { |
| snd_pcm_runtime_t *runtime = subs->runtime; |
| if (runtime->dma_area) { |
| vfree_nocheck(runtime->dma_area); |
| runtime->dma_area = NULL; |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * 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) |
| 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) |
| 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) |
| { |
| unsigned long end_time = jiffies + msecs_to_jiffies(1000); |
| 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 (time_before(jiffies, end_time)); |
| 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_pcm_uframes_t hwptr_done; |
| |
| subs = (snd_usb_substream_t *)substream->runtime->private_data; |
| spin_lock(&subs->lock); |
| hwptr_done = subs->hwptr_done; |
| spin_unlock(&subs->lock); |
| return 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) { |
| if (u->buffer_size) |
| usb_buffer_free(u->subs->dev, u->buffer_size, |
| u->urb->transfer_buffer, |
| u->urb->transfer_dma); |
| usb_free_urb(u->urb); |
| u->urb = 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]); |
| usb_buffer_free(subs->dev, SYNC_URBS * 4, |
| subs->syncbuf, subs->sync_dma); |
| subs->syncbuf = 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, packs_per_ms; |
| |
| /* 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; |
| /* calculate max. frequency */ |
| if (subs->maxpacksize) { |
| /* whatever fits into a max. size packet */ |
| maxsize = subs->maxpacksize; |
| subs->freqmax = (maxsize / (frame_bits >> 3)) |
| << (16 - subs->datainterval); |
| } else { |
| /* no max. packet size: just take 25% higher than nominal */ |
| subs->freqmax = subs->freqn + (subs->freqn >> 2); |
| maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3)) |
| >> (16 - subs->datainterval); |
| } |
| subs->phase = 0; |
| |
| if (subs->fill_max) |
| subs->curpacksize = subs->maxpacksize; |
| else |
| subs->curpacksize = maxsize; |
| |
| if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) |
| packs_per_ms = 8 >> subs->datainterval; |
| else |
| packs_per_ms = 1; |
| subs->packs_per_ms = packs_per_ms; |
| |
| if (is_playback) { |
| urb_packs = nrpacks; |
| urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB); |
| urb_packs = min(urb_packs, (unsigned int)MAX_PACKS); |
| } else |
| urb_packs = 1; |
| urb_packs *= packs_per_ms; |
| |
| /* decide how many packets to be used */ |
| if (is_playback) { |
| unsigned int minsize; |
| /* determine how small a packet can be */ |
| minsize = (subs->freqn >> (16 - subs->datainterval)) |
| * (frame_bits >> 3); |
| /* with sync from device, assume it can be 12% lower */ |
| if (subs->syncpipe) |
| minsize -= minsize >> 3; |
| minsize = max(minsize, 1u); |
| total_packs = (period_bytes + minsize - 1) / minsize; |
| /* round up to multiple of packs_per_ms */ |
| total_packs = (total_packs + packs_per_ms - 1) |
| & ~(packs_per_ms - 1); |
| /* we need at least two URBs for queueing */ |
| if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms) |
| total_packs = 2 * MIN_PACKS_URB * packs_per_ms; |
| } else { |
| total_packs = MAX_URBS * urb_packs; |
| } |
| 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 * packs_per_ms) { |
| /* 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->packets = npacks[i]; |
| u->buffer_size = maxsize * u->packets; |
| if (subs->fmt_type == USB_FORMAT_TYPE_II) |
| u->packets++; /* for transfer delimiter */ |
| u->urb = usb_alloc_urb(u->packets, GFP_KERNEL); |
| if (! u->urb) |
| goto out_of_memory; |
| u->urb->transfer_buffer = |
| usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL, |
| &u->urb->transfer_dma); |
| if (! u->urb->transfer_buffer) |
| goto out_of_memory; |
| u->urb->pipe = subs->datapipe; |
| u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; |
| u->urb->interval = 1 << subs->datainterval; |
| u->urb->context = u; |
| u->urb->complete = snd_usb_complete_callback(snd_complete_urb); |
| } |
| |
| if (subs->syncpipe) { |
| /* allocate and initialize sync urbs */ |
| subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4, |
| GFP_KERNEL, &subs->sync_dma); |
| if (! subs->syncbuf) |
| goto out_of_memory; |
| for (i = 0; i < SYNC_URBS; i++) { |
| snd_urb_ctx_t *u = &subs->syncurb[i]; |
| u->index = i; |
| u->subs = subs; |
| u->packets = 1; |
| u->urb = usb_alloc_urb(1, GFP_KERNEL); |
| if (! u->urb) |
| goto out_of_memory; |
| u->urb->transfer_buffer = subs->syncbuf + i * 4; |
| u->urb->transfer_dma = subs->sync_dma + i * 4; |
| u->urb->transfer_buffer_length = 4; |
| u->urb->pipe = subs->syncpipe; |
| u->urb->transfer_flags = URB_ISO_ASAP | |
| URB_NO_TRANSFER_DMA_MAP; |
| u->urb->number_of_packets = 1; |
| u->urb->interval = 1 << subs->syncinterval; |
| u->urb->context = u; |
| u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb); |
| } |
| } |
| return 0; |
| |
| out_of_memory: |
| release_substream_urbs(subs, 0); |
| return -ENOMEM; |
| } |
| |
| |
| /* |
| * 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); |
| if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH && |
| get_endpoint(alts, 0)->bInterval >= 1 && |
| get_endpoint(alts, 0)->bInterval <= 4) |
| subs->datainterval = get_endpoint(alts, 0)->bInterval - 1; |
| else |
| subs->datainterval = 0; |
| 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); |
| if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
| get_endpoint(alts, 1)->bRefresh >= 1 && |
| get_endpoint(alts, 1)->bRefresh <= 9) |
| subs->syncinterval = get_endpoint(alts, 1)->bRefresh; |
| else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) |
| subs->syncinterval = 1; |
| else if (get_endpoint(alts, 1)->bInterval >= 1 && |
| get_endpoint(alts, 1)->bInterval <= 16) |
| subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1; |
| else |
| subs->syncinterval = 3; |
| } |
| |
| /* 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_alloc_vmalloc_buffer(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_free_vmalloc_buffer(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_done = 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_MMAP_VALID | |
| SNDRV_PCM_INFO_BATCH | |
| SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_BLOCK_TRANSFER, |
| .buffer_bytes_max = 1024 * 1024, |
| .period_bytes_min = 64, |
| .period_bytes_max = 512 * 1024, |
| .periods_min = 2, |
| .periods_max = 1024, |
| }; |
| |
| static snd_pcm_hardware_t snd_usb_capture = |
| { |
| .info = SNDRV_PCM_INFO_MMAP | |
| SNDRV_PCM_INFO_MMAP_VALID | |
| SNDRV_PCM_INFO_BATCH | |
| SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_BLOCK_TRANSFER, |
| .buffer_bytes_max = 1024 * 1024, |
| .period_bytes_min = 64, |
| .period_bytes_max = 512 * 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, |
| .page = snd_pcm_get_vmalloc_page, |
| }; |
| |
| 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, |
| .page = snd_pcm_get_vmalloc_page, |
| }; |
| |
| |
| |
| /* |
| * 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 (%#x.%04x)\n", |
| snd_usb_get_speed(subs->dev) == USB_SPEED_FULL |
| ? get_full_speed_hz(subs->freqm) |
| : get_high_speed_hz(subs->freqm), |
| subs->freqm >> 16, subs->freqm & 0xffff); |
| } 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); |
| if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| tasklet_init(&subs->start_period_elapsed, start_period_elapsed, |
| (unsigned long)subs); |
| |
| 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_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_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(snd_usb_audio_t *chip, struct audioformat *fp) |
| { |
| switch (chip->usb_id) { |
| case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */ |
| if (fp->endpoint & USB_DIR_IN) |
| return 1; |
| break; |
| case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ |
| 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(snd_usb_audio_t *chip, 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", |
| chip->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", |
| chip->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(chip, 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(chip, 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", |
| chip->dev->devnum, fp->iface, |
| fp->altsetting, sample_width, sample_bytes); |
| break; |
| } |
| break; |
| case USB_AUDIO_FORMAT_PCM8: |
| /* Dallas DS4201 workaround */ |
| if (chip->usb_id == USB_ID(0x04fa, 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", |
| chip->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(snd_usb_audio_t *chip, 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", |
| chip->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(snd_usb_audio_t *chip, 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(chip, 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", |
| chip->dev->devnum, fp->iface, fp->altsetting, fp->channels); |
| return -1; |
| } |
| return parse_audio_format_rates(chip, fp, fmt, 7); |
| } |
| |
| /* |
| * prase the format type II descriptor |
| */ |
| static int parse_audio_format_ii(snd_usb_audio_t *chip, 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", |
| chip->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(chip, fp, fmt, 8); /* fmt[8..] sample rates */ |
| } |
| |
| static int parse_audio_format(snd_usb_audio_t *chip, 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(chip, fp, format, fmt); |
| break; |
| case USB_FORMAT_TYPE_II: |
| err = parse_audio_format_ii(chip, fp, format, fmt); |
| break; |
| default: |
| snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n", |
| chip->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/audigy 2 nx */ |
| /* extigy apparently supports sample rates other than 48k |
| * but not in ordinary way. so we enable only 48k atm. |
| */ |
| if (chip->usb_id == USB_ID(0x041e, 0x3000) || |
| chip->usb_id == USB_ID(0x041e, 0x3020)) { |
| if (fmt[3] == USB_FORMAT_TYPE_I && |
| fp->rates != SNDRV_PCM_RATE_48000 && |
| fp->rates != SNDRV_PCM_RATE_96000) |
| return -1; |
| } |
| #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; |
| fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); |
| if (snd_usb_get_speed(dev) == USB_SPEED_HIGH) |
| fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1) |
| * (fp->maxpacksize & 0x7ff); |
| fp->attributes = csep[3]; |
| |
| /* some quirks for attributes here */ |
| |
| switch (chip->usb_id) { |
| case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */ |
| /* Optoplay sets the sample rate attribute although |
| * it seems not supporting it in fact. |
| */ |
| fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE; |
| break; |
| case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */ |
| case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */ |
| /* doesn't set the sample rate attribute, but supports it */ |
| fp->attributes |= EP_CS_ATTR_SAMPLE_RATE; |
| break; |
| case USB_ID(0x047f, 0x0ca1): /* plantronics headset */ |
| case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is |
| an older model 77d:223) */ |
| /* |
| * plantronics headset and Griffin iMic have set adaptive-in |
| * although it's really not... |
| */ |
| 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; |
| break; |
| } |
| |
| /* ok, let's parse further... */ |
| if (parse_audio_format(chip, 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) |
| { |
| 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, |
| const snd_usb_audio_quirk_t *quirk) |
| { |
| 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 (chip->usb_id == USB_ID(0x0582, 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, |
| const snd_usb_audio_quirk_t *quirk) |
| { |
| 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; |
| } |
| |
| static int ignore_interface_quirk(snd_usb_audio_t *chip, |
| struct usb_interface *iface, |
| const snd_usb_audio_quirk_t *quirk) |
| { |
| 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; |
| } |
| |
| static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev) |
| { |
| u8 buf = 1; |
| |
| snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a, |
| USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER, |
| 0, 0, &buf, 1, 1000); |
| if (buf == 0) { |
| snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29, |
| USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER, |
| 1, 2000, NULL, 0, 1000); |
| return -ENODEV; |
| } |
| 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) |
| { |
| typedef int (*quirk_func_t)(snd_usb_audio_t *, struct usb_interface *, |
| const snd_usb_audio_quirk_t *); |
| static const quirk_func_t quirk_funcs[] = { |
| [QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk, |
| [QUIRK_COMPOSITE] = create_composite_quirk, |
| [QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface, |
| [QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface, |
| [QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface, |
| [QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface, |
| [QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface, |
| [QUIRK_MIDI_RAW] = snd_usb_create_midi_interface, |
| [QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface, |
| [QUIRK_MIDI_MIDITECH] = snd_usb_create_midi_interface, |
| [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_interface_quirk, |
| [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk, |
| [QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk, |
| [QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk, |
| }; |
| |
| if (quirk->type < QUIRK_TYPE_COUNT) { |
| return quirk_funcs[quirk->type](chip, iface, quirk); |
| } else { |
| 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", |
| USB_ID_VENDOR(chip->usb_id), |
| USB_ID_PRODUCT(chip->usb_id)); |
| } |
| |
| 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 = kzalloc(sizeof(*chip), GFP_KERNEL); |
| if (! chip) { |
| snd_card_free(card); |
| return -ENOMEM; |
| } |
| |
| chip->index = idx; |
| chip->dev = dev; |
| chip->card = card; |
| chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), |
| le16_to_cpu(dev->descriptor.idProduct)); |
| INIT_LIST_HEAD(&chip->pcm_list); |
| INIT_LIST_HEAD(&chip->midi_list); |
| INIT_LIST_HEAD(&chip->mixer_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", |
| USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id)); |
| 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", |
| USB_ID_VENDOR(chip->usb_id), |
| USB_ID_PRODUCT(chip->usb_id)); |
| } |
| } |
| |
| /* 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); |
| |
| *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; |
| u32 id; |
| |
| alts = &intf->altsetting[0]; |
| ifnum = get_iface_desc(alts)->bInterfaceNumber; |
| id = USB_ID(le16_to_cpu(dev->descriptor.idVendor), |
| le16_to_cpu(dev->descriptor.idProduct)); |
| |
| 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 (id == USB_ID(0x041e, 0x3000)) { |
| if (snd_usb_extigy_boot_quirk(dev, intf) < 0) |
| goto __err_val; |
| config = dev->actconfig; |
| } |
| /* SB Audigy 2 NX needs its own boot-up magic, too */ |
| if (id == USB_ID(0x041e, 0x3020)) { |
| if (snd_usb_audigy2nx_boot_quirk(dev) < 0) |
| goto __err_val; |
| } |
| |
| /* |
| * found a config. now register to ALSA |
| */ |
| |
| /* check whether it's already registered */ |
| chip = NULL; |
| down(®ister_mutex); |
| for (i = 0; i < SNDRV_CARDS; i++) { |
| if (usb_chip[i] && usb_chip[i]->dev == dev) { |
| 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] == USB_ID_VENDOR(id)) && |
| (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { |
| if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) { |
| goto __error; |
| } |
| snd_card_set_dev(chip->card, &intf->dev); |
| 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); |
| } |
| /* release the midi resources */ |
| list_for_each(p, &chip->midi_list) { |
| snd_usbmidi_disconnect(p); |
| } |
| /* release mixer resources */ |
| list_for_each(p, &chip->mixer_list) { |
| snd_usb_mixer_disconnect(p); |
| } |
| usb_chip[chip->index] = NULL; |
| up(®ister_mutex); |
| snd_card_free(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); |