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1103 lines
30 KiB
1103 lines
30 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* (Tentative) USB Audio Driver for ALSA |
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* |
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* Copyright (c) 2002 by Takashi Iwai <[email protected]> |
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* |
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* Many codes borrowed from audio.c by |
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* Alan Cox ([email protected]) |
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* Thomas Sailer ([email protected]) |
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* |
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* Audio Class 3.0 support by Ruslan Bilovol <[email protected]> |
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* |
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* NOTES: |
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* |
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* - the linked URBs would be preferred but not used so far because of |
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* the instability of unlinking. |
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* - type II is not supported properly. there is no device which supports |
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* this type *correctly*. SB extigy looks as if it supports, but it's |
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* indeed an AC3 stream packed in SPDIF frames (i.e. no real AC3 stream). |
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*/ |
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#include <linux/bitops.h> |
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#include <linux/init.h> |
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#include <linux/list.h> |
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#include <linux/slab.h> |
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#include <linux/string.h> |
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#include <linux/ctype.h> |
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#include <linux/usb.h> |
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#include <linux/moduleparam.h> |
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#include <linux/mutex.h> |
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#include <linux/usb/audio.h> |
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#include <linux/usb/audio-v2.h> |
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#include <linux/usb/audio-v3.h> |
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#include <linux/module.h> |
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|
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#include <sound/control.h> |
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#include <sound/core.h> |
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#include <sound/info.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/initval.h> |
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|
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#include "usbaudio.h" |
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#include "card.h" |
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#include "midi.h" |
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#include "mixer.h" |
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#include "proc.h" |
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#include "quirks.h" |
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#include "endpoint.h" |
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#include "helper.h" |
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#include "pcm.h" |
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#include "format.h" |
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#include "power.h" |
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#include "stream.h" |
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#include "media.h" |
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MODULE_AUTHOR("Takashi Iwai <[email protected]>"); |
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MODULE_DESCRIPTION("USB Audio"); |
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MODULE_LICENSE("GPL"); |
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ |
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ |
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static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */ |
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/* Vendor/product IDs for this card */ |
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static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; |
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static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; |
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static int device_setup[SNDRV_CARDS]; /* device parameter for this card */ |
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static bool ignore_ctl_error; |
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static bool autoclock = true; |
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static char *quirk_alias[SNDRV_CARDS]; |
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static char *delayed_register[SNDRV_CARDS]; |
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static bool implicit_fb[SNDRV_CARDS]; |
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bool snd_usb_use_vmalloc = true; |
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bool snd_usb_skip_validation; |
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module_param_array(index, int, NULL, 0444); |
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MODULE_PARM_DESC(index, "Index value for the USB audio adapter."); |
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module_param_array(id, charp, NULL, 0444); |
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MODULE_PARM_DESC(id, "ID string for the USB audio adapter."); |
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module_param_array(enable, bool, NULL, 0444); |
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MODULE_PARM_DESC(enable, "Enable USB audio adapter."); |
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module_param_array(vid, int, NULL, 0444); |
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MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device."); |
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module_param_array(pid, int, NULL, 0444); |
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MODULE_PARM_DESC(pid, "Product ID for the USB audio device."); |
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module_param_array(device_setup, int, NULL, 0444); |
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MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); |
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module_param(ignore_ctl_error, bool, 0444); |
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MODULE_PARM_DESC(ignore_ctl_error, |
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"Ignore errors from USB controller for mixer interfaces."); |
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module_param(autoclock, bool, 0444); |
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MODULE_PARM_DESC(autoclock, "Enable auto-clock selection for UAC2 devices (default: yes)."); |
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module_param_array(quirk_alias, charp, NULL, 0444); |
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MODULE_PARM_DESC(quirk_alias, "Quirk aliases, e.g. 0123abcd:5678beef."); |
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module_param_array(delayed_register, charp, NULL, 0444); |
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MODULE_PARM_DESC(delayed_register, "Quirk for delayed registration, given by id:iface, e.g. 0123abcd:4."); |
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module_param_array(implicit_fb, bool, NULL, 0444); |
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MODULE_PARM_DESC(implicit_fb, "Apply generic implicit feedback sync mode."); |
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module_param_named(use_vmalloc, snd_usb_use_vmalloc, bool, 0444); |
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MODULE_PARM_DESC(use_vmalloc, "Use vmalloc for PCM intermediate buffers (default: yes)."); |
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module_param_named(skip_validation, snd_usb_skip_validation, bool, 0444); |
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MODULE_PARM_DESC(skip_validation, "Skip unit descriptor validation (default: no)."); |
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/* |
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* we keep the snd_usb_audio_t instances by ourselves for merging |
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* the all interfaces on the same card as one sound device. |
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*/ |
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static DEFINE_MUTEX(register_mutex); |
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static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; |
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static struct usb_driver usb_audio_driver; |
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|
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/* |
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* disconnect streams |
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* called from usb_audio_disconnect() |
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*/ |
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static void snd_usb_stream_disconnect(struct snd_usb_stream *as) |
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{ |
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int idx; |
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struct snd_usb_substream *subs; |
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for (idx = 0; idx < 2; idx++) { |
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subs = &as->substream[idx]; |
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if (!subs->num_formats) |
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continue; |
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subs->data_endpoint = NULL; |
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subs->sync_endpoint = NULL; |
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} |
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} |
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static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) |
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{ |
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struct usb_device *dev = chip->dev; |
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struct usb_host_interface *alts; |
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struct usb_interface_descriptor *altsd; |
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struct usb_interface *iface = usb_ifnum_to_if(dev, interface); |
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if (!iface) { |
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dev_err(&dev->dev, "%u:%d : does not exist\n", |
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ctrlif, interface); |
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return -EINVAL; |
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} |
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alts = &iface->altsetting[0]; |
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altsd = get_iface_desc(alts); |
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/* |
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* Android with both accessory and audio interfaces enabled gets the |
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* interface numbers wrong. |
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*/ |
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if ((chip->usb_id == USB_ID(0x18d1, 0x2d04) || |
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chip->usb_id == USB_ID(0x18d1, 0x2d05)) && |
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interface == 0 && |
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altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && |
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altsd->bInterfaceSubClass == USB_SUBCLASS_VENDOR_SPEC) { |
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interface = 2; |
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iface = usb_ifnum_to_if(dev, interface); |
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if (!iface) |
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return -EINVAL; |
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alts = &iface->altsetting[0]; |
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altsd = get_iface_desc(alts); |
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} |
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if (usb_interface_claimed(iface)) { |
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dev_dbg(&dev->dev, "%d:%d: skipping, already claimed\n", |
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ctrlif, interface); |
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return -EINVAL; |
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} |
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if ((altsd->bInterfaceClass == USB_CLASS_AUDIO || |
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altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) && |
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altsd->bInterfaceSubClass == USB_SUBCLASS_MIDISTREAMING) { |
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int err = __snd_usbmidi_create(chip->card, iface, |
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&chip->midi_list, NULL, |
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chip->usb_id); |
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if (err < 0) { |
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dev_err(&dev->dev, |
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"%u:%d: cannot create sequencer device\n", |
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ctrlif, interface); |
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return -EINVAL; |
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} |
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return usb_driver_claim_interface(&usb_audio_driver, iface, |
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USB_AUDIO_IFACE_UNUSED); |
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} |
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if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && |
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altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || |
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altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { |
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dev_dbg(&dev->dev, |
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"%u:%d: skipping non-supported interface %d\n", |
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ctrlif, interface, altsd->bInterfaceClass); |
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/* skip non-supported classes */ |
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return -EINVAL; |
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} |
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if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { |
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dev_err(&dev->dev, "low speed audio streaming not supported\n"); |
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return -EINVAL; |
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} |
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if (! snd_usb_parse_audio_interface(chip, interface)) { |
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usb_set_interface(dev, interface, 0); /* reset the current interface */ |
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return usb_driver_claim_interface(&usb_audio_driver, iface, |
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USB_AUDIO_IFACE_UNUSED); |
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} |
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return 0; |
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} |
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/* |
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* parse audio control descriptor and create pcm/midi streams |
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*/ |
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static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) |
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{ |
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struct usb_device *dev = chip->dev; |
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struct usb_host_interface *host_iface; |
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struct usb_interface_descriptor *altsd; |
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int i, protocol; |
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/* find audiocontrol interface */ |
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host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; |
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altsd = get_iface_desc(host_iface); |
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protocol = altsd->bInterfaceProtocol; |
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switch (protocol) { |
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default: |
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dev_warn(&dev->dev, |
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"unknown interface protocol %#02x, assuming v1\n", |
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protocol); |
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fallthrough; |
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case UAC_VERSION_1: { |
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struct uac1_ac_header_descriptor *h1; |
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int rest_bytes; |
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h1 = snd_usb_find_csint_desc(host_iface->extra, |
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host_iface->extralen, |
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NULL, UAC_HEADER); |
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if (!h1 || h1->bLength < sizeof(*h1)) { |
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dev_err(&dev->dev, "cannot find UAC_HEADER\n"); |
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return -EINVAL; |
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} |
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rest_bytes = (void *)(host_iface->extra + |
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host_iface->extralen) - (void *)h1; |
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/* just to be sure -- this shouldn't hit at all */ |
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if (rest_bytes <= 0) { |
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dev_err(&dev->dev, "invalid control header\n"); |
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return -EINVAL; |
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} |
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if (rest_bytes < sizeof(*h1)) { |
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dev_err(&dev->dev, "too short v1 buffer descriptor\n"); |
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return -EINVAL; |
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} |
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if (!h1->bInCollection) { |
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dev_info(&dev->dev, "skipping empty audio interface (v1)\n"); |
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return -EINVAL; |
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} |
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if (rest_bytes < h1->bLength) { |
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dev_err(&dev->dev, "invalid buffer length (v1)\n"); |
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return -EINVAL; |
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} |
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if (h1->bLength < sizeof(*h1) + h1->bInCollection) { |
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dev_err(&dev->dev, "invalid UAC_HEADER (v1)\n"); |
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return -EINVAL; |
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} |
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for (i = 0; i < h1->bInCollection; i++) |
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snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); |
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break; |
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} |
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case UAC_VERSION_2: |
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case UAC_VERSION_3: { |
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struct usb_interface_assoc_descriptor *assoc = |
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usb_ifnum_to_if(dev, ctrlif)->intf_assoc; |
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if (!assoc) { |
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/* |
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* Firmware writers cannot count to three. So to find |
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* the IAD on the NuForce UDH-100, also check the next |
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* interface. |
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*/ |
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struct usb_interface *iface = |
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usb_ifnum_to_if(dev, ctrlif + 1); |
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if (iface && |
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iface->intf_assoc && |
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iface->intf_assoc->bFunctionClass == USB_CLASS_AUDIO && |
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iface->intf_assoc->bFunctionProtocol == UAC_VERSION_2) |
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assoc = iface->intf_assoc; |
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} |
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if (!assoc) { |
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dev_err(&dev->dev, "Audio class v2/v3 interfaces need an interface association\n"); |
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return -EINVAL; |
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} |
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if (protocol == UAC_VERSION_3) { |
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int badd = assoc->bFunctionSubClass; |
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if (badd != UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0 && |
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(badd < UAC3_FUNCTION_SUBCLASS_GENERIC_IO || |
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badd > UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE)) { |
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dev_err(&dev->dev, |
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"Unsupported UAC3 BADD profile\n"); |
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return -EINVAL; |
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} |
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chip->badd_profile = badd; |
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} |
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for (i = 0; i < assoc->bInterfaceCount; i++) { |
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int intf = assoc->bFirstInterface + i; |
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if (intf != ctrlif) |
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snd_usb_create_stream(chip, ctrlif, intf); |
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} |
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break; |
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} |
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} |
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return 0; |
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} |
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/* |
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* Profile name preset table |
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*/ |
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struct usb_audio_device_name { |
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u32 id; |
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const char *vendor_name; |
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const char *product_name; |
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const char *profile_name; /* override card->longname */ |
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}; |
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#define PROFILE_NAME(vid, pid, vendor, product, profile) \ |
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{ .id = USB_ID(vid, pid), .vendor_name = (vendor), \ |
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.product_name = (product), .profile_name = (profile) } |
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#define DEVICE_NAME(vid, pid, vendor, product) \ |
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PROFILE_NAME(vid, pid, vendor, product, NULL) |
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/* vendor/product and profile name presets, sorted in device id order */ |
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static const struct usb_audio_device_name usb_audio_names[] = { |
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/* HP Thunderbolt Dock Audio Headset */ |
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PROFILE_NAME(0x03f0, 0x0269, "HP", "Thunderbolt Dock Audio Headset", |
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"HP-Thunderbolt-Dock-Audio-Headset"), |
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/* HP Thunderbolt Dock Audio Module */ |
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PROFILE_NAME(0x03f0, 0x0567, "HP", "Thunderbolt Dock Audio Module", |
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"HP-Thunderbolt-Dock-Audio-Module"), |
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/* Two entries for Gigabyte TRX40 Aorus Master: |
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* TRX40 Aorus Master has two USB-audio devices, one for the front |
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* headphone with ESS SABRE9218 DAC chip, while another for the rest |
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* I/O (the rear panel and the front mic) with Realtek ALC1220-VB. |
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* Here we provide two distinct names for making UCM profiles easier. |
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*/ |
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PROFILE_NAME(0x0414, 0xa000, "Gigabyte", "Aorus Master Front Headphone", |
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"Gigabyte-Aorus-Master-Front-Headphone"), |
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PROFILE_NAME(0x0414, 0xa001, "Gigabyte", "Aorus Master Main Audio", |
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"Gigabyte-Aorus-Master-Main-Audio"), |
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/* Gigabyte TRX40 Aorus Pro WiFi */ |
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PROFILE_NAME(0x0414, 0xa002, |
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"Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), |
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/* Creative/E-Mu devices */ |
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DEVICE_NAME(0x041e, 0x3010, "Creative Labs", "Sound Blaster MP3+"), |
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/* Creative/Toshiba Multimedia Center SB-0500 */ |
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DEVICE_NAME(0x041e, 0x3048, "Toshiba", "SB-0500"), |
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DEVICE_NAME(0x046d, 0x0990, "Logitech, Inc.", "QuickCam Pro 9000"), |
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/* ASUS ROG Strix */ |
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PROFILE_NAME(0x0b05, 0x1917, |
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"Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), |
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/* ASUS PRIME TRX40 PRO-S */ |
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PROFILE_NAME(0x0b05, 0x1918, |
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"Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), |
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|
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/* Dell WD15 Dock */ |
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PROFILE_NAME(0x0bda, 0x4014, "Dell", "WD15 Dock", "Dell-WD15-Dock"), |
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/* Dell WD19 Dock */ |
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PROFILE_NAME(0x0bda, 0x402e, "Dell", "WD19 Dock", "Dell-WD15-Dock"), |
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DEVICE_NAME(0x0ccd, 0x0028, "TerraTec", "Aureon5.1MkII"), |
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|
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/* |
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* The original product_name is "USB Sound Device", however this name |
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* is also used by the CM106 based cards, so make it unique. |
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*/ |
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DEVICE_NAME(0x0d8c, 0x0102, NULL, "ICUSBAUDIO7D"), |
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DEVICE_NAME(0x0d8c, 0x0103, NULL, "Audio Advantage MicroII"), |
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/* MSI TRX40 Creator */ |
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PROFILE_NAME(0x0db0, 0x0d64, |
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"Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), |
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/* MSI TRX40 */ |
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PROFILE_NAME(0x0db0, 0x543d, |
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"Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), |
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|
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/* Stanton/N2IT Final Scratch v1 device ('Scratchamp') */ |
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DEVICE_NAME(0x103d, 0x0100, "Stanton", "ScratchAmp"), |
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DEVICE_NAME(0x103d, 0x0101, "Stanton", "ScratchAmp"), |
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|
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/* aka. Serato Scratch Live DJ Box */ |
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DEVICE_NAME(0x13e5, 0x0001, "Rane", "SL-1"), |
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|
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/* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */ |
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PROFILE_NAME(0x17aa, 0x1046, "Lenovo", "ThinkStation P620 Rear", |
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"Lenovo-ThinkStation-P620-Rear"), |
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/* Lenovo ThinkStation P620 Internal Speaker + Front Headset */ |
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PROFILE_NAME(0x17aa, 0x104d, "Lenovo", "ThinkStation P620 Main", |
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"Lenovo-ThinkStation-P620-Main"), |
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|
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/* Asrock TRX40 Creator */ |
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PROFILE_NAME(0x26ce, 0x0a01, |
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"Realtek", "ALC1220-VB-DT", "Realtek-ALC1220-VB-Desktop"), |
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|
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{ } /* terminator */ |
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}; |
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static const struct usb_audio_device_name * |
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lookup_device_name(u32 id) |
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{ |
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static const struct usb_audio_device_name *p; |
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|
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for (p = usb_audio_names; p->id; p++) |
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if (p->id == id) |
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return p; |
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return NULL; |
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} |
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|
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/* |
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* free the chip instance |
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* |
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* here we have to do not much, since pcm and controls are already freed |
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* |
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*/ |
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|
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static void snd_usb_audio_free(struct snd_card *card) |
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{ |
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struct snd_usb_audio *chip = card->private_data; |
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snd_usb_endpoint_free_all(chip); |
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|
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mutex_destroy(&chip->mutex); |
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if (!atomic_read(&chip->shutdown)) |
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dev_set_drvdata(&chip->dev->dev, NULL); |
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} |
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|
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static void usb_audio_make_shortname(struct usb_device *dev, |
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struct snd_usb_audio *chip, |
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const struct snd_usb_audio_quirk *quirk) |
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{ |
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struct snd_card *card = chip->card; |
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const struct usb_audio_device_name *preset; |
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const char *s = NULL; |
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|
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preset = lookup_device_name(chip->usb_id); |
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if (preset && preset->product_name) |
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s = preset->product_name; |
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else if (quirk && quirk->product_name) |
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s = quirk->product_name; |
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if (s && *s) { |
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strscpy(card->shortname, s, sizeof(card->shortname)); |
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return; |
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} |
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|
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/* retrieve the device string as shortname */ |
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if (!dev->descriptor.iProduct || |
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usb_string(dev, dev->descriptor.iProduct, |
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card->shortname, sizeof(card->shortname)) <= 0) { |
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/* no name available from anywhere, so use ID */ |
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sprintf(card->shortname, "USB Device %#04x:%#04x", |
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USB_ID_VENDOR(chip->usb_id), |
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USB_ID_PRODUCT(chip->usb_id)); |
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} |
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|
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strim(card->shortname); |
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} |
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|
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static void usb_audio_make_longname(struct usb_device *dev, |
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struct snd_usb_audio *chip, |
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const struct snd_usb_audio_quirk *quirk) |
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{ |
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struct snd_card *card = chip->card; |
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const struct usb_audio_device_name *preset; |
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const char *s = NULL; |
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int len; |
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|
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preset = lookup_device_name(chip->usb_id); |
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|
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/* shortcut - if any pre-defined string is given, use it */ |
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if (preset && preset->profile_name) |
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s = preset->profile_name; |
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if (s && *s) { |
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strscpy(card->longname, s, sizeof(card->longname)); |
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return; |
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} |
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|
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if (preset && preset->vendor_name) |
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s = preset->vendor_name; |
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else if (quirk && quirk->vendor_name) |
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s = quirk->vendor_name; |
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*card->longname = 0; |
|
if (s && *s) { |
|
strscpy(card->longname, s, sizeof(card->longname)); |
|
} else { |
|
/* retrieve the vendor and device strings as longname */ |
|
if (dev->descriptor.iManufacturer) |
|
usb_string(dev, dev->descriptor.iManufacturer, |
|
card->longname, sizeof(card->longname)); |
|
/* we don't really care if there isn't any vendor string */ |
|
} |
|
if (*card->longname) { |
|
strim(card->longname); |
|
if (*card->longname) |
|
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); |
|
|
|
switch (snd_usb_get_speed(dev)) { |
|
case USB_SPEED_LOW: |
|
strlcat(card->longname, ", low speed", sizeof(card->longname)); |
|
break; |
|
case USB_SPEED_FULL: |
|
strlcat(card->longname, ", full speed", sizeof(card->longname)); |
|
break; |
|
case USB_SPEED_HIGH: |
|
strlcat(card->longname, ", high speed", sizeof(card->longname)); |
|
break; |
|
case USB_SPEED_SUPER: |
|
strlcat(card->longname, ", super speed", sizeof(card->longname)); |
|
break; |
|
case USB_SPEED_SUPER_PLUS: |
|
strlcat(card->longname, ", super speed plus", sizeof(card->longname)); |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
/* |
|
* create a chip instance and set its names. |
|
*/ |
|
static int snd_usb_audio_create(struct usb_interface *intf, |
|
struct usb_device *dev, int idx, |
|
const struct snd_usb_audio_quirk *quirk, |
|
unsigned int usb_id, |
|
struct snd_usb_audio **rchip) |
|
{ |
|
struct snd_card *card; |
|
struct snd_usb_audio *chip; |
|
int err; |
|
char component[14]; |
|
|
|
*rchip = NULL; |
|
|
|
switch (snd_usb_get_speed(dev)) { |
|
case USB_SPEED_LOW: |
|
case USB_SPEED_FULL: |
|
case USB_SPEED_HIGH: |
|
case USB_SPEED_WIRELESS: |
|
case USB_SPEED_SUPER: |
|
case USB_SPEED_SUPER_PLUS: |
|
break; |
|
default: |
|
dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev)); |
|
return -ENXIO; |
|
} |
|
|
|
err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE, |
|
sizeof(*chip), &card); |
|
if (err < 0) { |
|
dev_err(&dev->dev, "cannot create card instance %d\n", idx); |
|
return err; |
|
} |
|
|
|
chip = card->private_data; |
|
mutex_init(&chip->mutex); |
|
init_waitqueue_head(&chip->shutdown_wait); |
|
chip->index = idx; |
|
chip->dev = dev; |
|
chip->card = card; |
|
chip->setup = device_setup[idx]; |
|
chip->generic_implicit_fb = implicit_fb[idx]; |
|
chip->autoclock = autoclock; |
|
atomic_set(&chip->active, 1); /* avoid autopm during probing */ |
|
atomic_set(&chip->usage_count, 0); |
|
atomic_set(&chip->shutdown, 0); |
|
|
|
chip->usb_id = usb_id; |
|
INIT_LIST_HEAD(&chip->pcm_list); |
|
INIT_LIST_HEAD(&chip->ep_list); |
|
INIT_LIST_HEAD(&chip->iface_ref_list); |
|
INIT_LIST_HEAD(&chip->midi_list); |
|
INIT_LIST_HEAD(&chip->mixer_list); |
|
|
|
card->private_free = snd_usb_audio_free; |
|
|
|
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); |
|
|
|
usb_audio_make_shortname(dev, chip, quirk); |
|
usb_audio_make_longname(dev, chip, quirk); |
|
|
|
snd_usb_audio_create_proc(chip); |
|
|
|
*rchip = chip; |
|
return 0; |
|
} |
|
|
|
/* look for a matching quirk alias id */ |
|
static bool get_alias_id(struct usb_device *dev, unsigned int *id) |
|
{ |
|
int i; |
|
unsigned int src, dst; |
|
|
|
for (i = 0; i < ARRAY_SIZE(quirk_alias); i++) { |
|
if (!quirk_alias[i] || |
|
sscanf(quirk_alias[i], "%x:%x", &src, &dst) != 2 || |
|
src != *id) |
|
continue; |
|
dev_info(&dev->dev, |
|
"device (%04x:%04x): applying quirk alias %04x:%04x\n", |
|
USB_ID_VENDOR(*id), USB_ID_PRODUCT(*id), |
|
USB_ID_VENDOR(dst), USB_ID_PRODUCT(dst)); |
|
*id = dst; |
|
return true; |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static bool check_delayed_register_option(struct snd_usb_audio *chip, int iface) |
|
{ |
|
int i; |
|
unsigned int id, inum; |
|
|
|
for (i = 0; i < ARRAY_SIZE(delayed_register); i++) { |
|
if (delayed_register[i] && |
|
sscanf(delayed_register[i], "%x:%x", &id, &inum) == 2 && |
|
id == chip->usb_id) |
|
return inum != iface; |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static const struct usb_device_id usb_audio_ids[]; /* defined below */ |
|
|
|
/* look for the corresponding quirk */ |
|
static const struct snd_usb_audio_quirk * |
|
get_alias_quirk(struct usb_device *dev, unsigned int id) |
|
{ |
|
const struct usb_device_id *p; |
|
|
|
for (p = usb_audio_ids; p->match_flags; p++) { |
|
/* FIXME: this checks only vendor:product pair in the list */ |
|
if ((p->match_flags & USB_DEVICE_ID_MATCH_DEVICE) == |
|
USB_DEVICE_ID_MATCH_DEVICE && |
|
p->idVendor == USB_ID_VENDOR(id) && |
|
p->idProduct == USB_ID_PRODUCT(id)) |
|
return (const struct snd_usb_audio_quirk *)p->driver_info; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/* |
|
* 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 int usb_audio_probe(struct usb_interface *intf, |
|
const struct usb_device_id *usb_id) |
|
{ |
|
struct usb_device *dev = interface_to_usbdev(intf); |
|
const struct snd_usb_audio_quirk *quirk = |
|
(const struct snd_usb_audio_quirk *)usb_id->driver_info; |
|
struct snd_usb_audio *chip; |
|
int i, err; |
|
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 (get_alias_id(dev, &id)) |
|
quirk = get_alias_quirk(dev, id); |
|
if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum) |
|
return -ENXIO; |
|
|
|
err = snd_usb_apply_boot_quirk(dev, intf, quirk, id); |
|
if (err < 0) |
|
return err; |
|
|
|
/* |
|
* found a config. now register to ALSA |
|
*/ |
|
|
|
/* check whether it's already registered */ |
|
chip = NULL; |
|
mutex_lock(®ister_mutex); |
|
for (i = 0; i < SNDRV_CARDS; i++) { |
|
if (usb_chip[i] && usb_chip[i]->dev == dev) { |
|
if (atomic_read(&usb_chip[i]->shutdown)) { |
|
dev_err(&dev->dev, "USB device is in the shutdown state, cannot create a card instance\n"); |
|
err = -EIO; |
|
goto __error; |
|
} |
|
chip = usb_chip[i]; |
|
atomic_inc(&chip->active); /* avoid autopm */ |
|
break; |
|
} |
|
} |
|
if (! chip) { |
|
err = snd_usb_apply_boot_quirk_once(dev, intf, quirk, id); |
|
if (err < 0) |
|
goto __error; |
|
|
|
/* it's a fresh one. |
|
* now look for an empty slot and create a new card instance |
|
*/ |
|
for (i = 0; i < SNDRV_CARDS; i++) |
|
if (!usb_chip[i] && |
|
(vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) && |
|
(pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) { |
|
if (enable[i]) { |
|
err = snd_usb_audio_create(intf, dev, i, quirk, |
|
id, &chip); |
|
if (err < 0) |
|
goto __error; |
|
break; |
|
} else if (vid[i] != -1 || pid[i] != -1) { |
|
dev_info(&dev->dev, |
|
"device (%04x:%04x) is disabled\n", |
|
USB_ID_VENDOR(id), |
|
USB_ID_PRODUCT(id)); |
|
err = -ENOENT; |
|
goto __error; |
|
} |
|
} |
|
if (!chip) { |
|
dev_err(&dev->dev, "no available usb audio device\n"); |
|
err = -ENODEV; |
|
goto __error; |
|
} |
|
} |
|
|
|
if (chip->num_interfaces >= MAX_CARD_INTERFACES) { |
|
dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n"); |
|
err = -EINVAL; |
|
goto __error; |
|
} |
|
|
|
dev_set_drvdata(&dev->dev, chip); |
|
|
|
/* |
|
* For devices with more than one control interface, we assume the |
|
* first contains the audio controls. We might need a more specific |
|
* check here in the future. |
|
*/ |
|
if (!chip->ctrl_intf) |
|
chip->ctrl_intf = alts; |
|
|
|
chip->txfr_quirk = 0; |
|
err = 1; /* continue */ |
|
if (quirk && quirk->ifnum != QUIRK_NO_INTERFACE) { |
|
/* need some special handlings */ |
|
err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, quirk); |
|
if (err < 0) |
|
goto __error; |
|
} |
|
|
|
if (err > 0) { |
|
/* create normal USB audio interfaces */ |
|
err = snd_usb_create_streams(chip, ifnum); |
|
if (err < 0) |
|
goto __error; |
|
err = snd_usb_create_mixer(chip, ifnum, ignore_ctl_error); |
|
if (err < 0) |
|
goto __error; |
|
} |
|
|
|
if (chip->need_delayed_register) { |
|
dev_info(&dev->dev, |
|
"Found post-registration device assignment: %08x:%02x\n", |
|
chip->usb_id, ifnum); |
|
chip->need_delayed_register = false; /* clear again */ |
|
} |
|
|
|
/* we are allowed to call snd_card_register() many times, but first |
|
* check to see if a device needs to skip it or do anything special |
|
*/ |
|
if (!snd_usb_registration_quirk(chip, ifnum) && |
|
!check_delayed_register_option(chip, ifnum)) { |
|
err = snd_card_register(chip->card); |
|
if (err < 0) |
|
goto __error; |
|
} |
|
|
|
if (quirk && quirk->shares_media_device) { |
|
/* don't want to fail when snd_media_device_create() fails */ |
|
snd_media_device_create(chip, intf); |
|
} |
|
|
|
if (quirk) |
|
chip->quirk_type = quirk->type; |
|
|
|
usb_chip[chip->index] = chip; |
|
chip->intf[chip->num_interfaces] = intf; |
|
chip->num_interfaces++; |
|
usb_set_intfdata(intf, chip); |
|
atomic_dec(&chip->active); |
|
mutex_unlock(®ister_mutex); |
|
return 0; |
|
|
|
__error: |
|
if (chip) { |
|
/* chip->active is inside the chip->card object, |
|
* decrement before memory is possibly returned. |
|
*/ |
|
atomic_dec(&chip->active); |
|
if (!chip->num_interfaces) |
|
snd_card_free(chip->card); |
|
} |
|
mutex_unlock(®ister_mutex); |
|
return err; |
|
} |
|
|
|
/* |
|
* we need to take care of counter, since disconnection can be called also |
|
* many times as well as usb_audio_probe(). |
|
*/ |
|
static void usb_audio_disconnect(struct usb_interface *intf) |
|
{ |
|
struct snd_usb_audio *chip = usb_get_intfdata(intf); |
|
struct snd_card *card; |
|
struct list_head *p; |
|
|
|
if (chip == USB_AUDIO_IFACE_UNUSED) |
|
return; |
|
|
|
card = chip->card; |
|
|
|
mutex_lock(®ister_mutex); |
|
if (atomic_inc_return(&chip->shutdown) == 1) { |
|
struct snd_usb_stream *as; |
|
struct snd_usb_endpoint *ep; |
|
struct usb_mixer_interface *mixer; |
|
|
|
/* wait until all pending tasks done; |
|
* they are protected by snd_usb_lock_shutdown() |
|
*/ |
|
wait_event(chip->shutdown_wait, |
|
!atomic_read(&chip->usage_count)); |
|
snd_card_disconnect(card); |
|
/* release the pcm resources */ |
|
list_for_each_entry(as, &chip->pcm_list, list) { |
|
snd_usb_stream_disconnect(as); |
|
} |
|
/* release the endpoint resources */ |
|
list_for_each_entry(ep, &chip->ep_list, list) { |
|
snd_usb_endpoint_release(ep); |
|
} |
|
/* release the midi resources */ |
|
list_for_each(p, &chip->midi_list) { |
|
snd_usbmidi_disconnect(p); |
|
} |
|
/* |
|
* Nice to check quirk && quirk->shares_media_device and |
|
* then call the snd_media_device_delete(). Don't have |
|
* access to the quirk here. snd_media_device_delete() |
|
* accesses mixer_list |
|
*/ |
|
snd_media_device_delete(chip); |
|
|
|
/* release mixer resources */ |
|
list_for_each_entry(mixer, &chip->mixer_list, list) { |
|
snd_usb_mixer_disconnect(mixer); |
|
} |
|
} |
|
|
|
if (chip->quirk_type & QUIRK_SETUP_DISABLE_AUTOSUSPEND) |
|
usb_enable_autosuspend(interface_to_usbdev(intf)); |
|
|
|
chip->num_interfaces--; |
|
if (chip->num_interfaces <= 0) { |
|
usb_chip[chip->index] = NULL; |
|
mutex_unlock(®ister_mutex); |
|
snd_card_free_when_closed(card); |
|
} else { |
|
mutex_unlock(®ister_mutex); |
|
} |
|
} |
|
|
|
/* lock the shutdown (disconnect) task and autoresume */ |
|
int snd_usb_lock_shutdown(struct snd_usb_audio *chip) |
|
{ |
|
int err; |
|
|
|
atomic_inc(&chip->usage_count); |
|
if (atomic_read(&chip->shutdown)) { |
|
err = -EIO; |
|
goto error; |
|
} |
|
err = snd_usb_autoresume(chip); |
|
if (err < 0) |
|
goto error; |
|
return 0; |
|
|
|
error: |
|
if (atomic_dec_and_test(&chip->usage_count)) |
|
wake_up(&chip->shutdown_wait); |
|
return err; |
|
} |
|
|
|
/* autosuspend and unlock the shutdown */ |
|
void snd_usb_unlock_shutdown(struct snd_usb_audio *chip) |
|
{ |
|
snd_usb_autosuspend(chip); |
|
if (atomic_dec_and_test(&chip->usage_count)) |
|
wake_up(&chip->shutdown_wait); |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
|
|
int snd_usb_autoresume(struct snd_usb_audio *chip) |
|
{ |
|
int i, err; |
|
|
|
if (atomic_read(&chip->shutdown)) |
|
return -EIO; |
|
if (atomic_inc_return(&chip->active) != 1) |
|
return 0; |
|
|
|
for (i = 0; i < chip->num_interfaces; i++) { |
|
err = usb_autopm_get_interface(chip->intf[i]); |
|
if (err < 0) { |
|
/* rollback */ |
|
while (--i >= 0) |
|
usb_autopm_put_interface(chip->intf[i]); |
|
atomic_dec(&chip->active); |
|
return err; |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
void snd_usb_autosuspend(struct snd_usb_audio *chip) |
|
{ |
|
int i; |
|
|
|
if (atomic_read(&chip->shutdown)) |
|
return; |
|
if (!atomic_dec_and_test(&chip->active)) |
|
return; |
|
|
|
for (i = 0; i < chip->num_interfaces; i++) |
|
usb_autopm_put_interface(chip->intf[i]); |
|
} |
|
|
|
static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) |
|
{ |
|
struct snd_usb_audio *chip = usb_get_intfdata(intf); |
|
struct snd_usb_stream *as; |
|
struct snd_usb_endpoint *ep; |
|
struct usb_mixer_interface *mixer; |
|
struct list_head *p; |
|
|
|
if (chip == USB_AUDIO_IFACE_UNUSED) |
|
return 0; |
|
|
|
if (!chip->num_suspended_intf++) { |
|
list_for_each_entry(as, &chip->pcm_list, list) |
|
snd_usb_pcm_suspend(as); |
|
list_for_each_entry(ep, &chip->ep_list, list) |
|
snd_usb_endpoint_suspend(ep); |
|
list_for_each(p, &chip->midi_list) |
|
snd_usbmidi_suspend(p); |
|
list_for_each_entry(mixer, &chip->mixer_list, list) |
|
snd_usb_mixer_suspend(mixer); |
|
} |
|
|
|
if (!PMSG_IS_AUTO(message) && !chip->system_suspend) { |
|
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); |
|
chip->system_suspend = chip->num_suspended_intf; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int __usb_audio_resume(struct usb_interface *intf, bool reset_resume) |
|
{ |
|
struct snd_usb_audio *chip = usb_get_intfdata(intf); |
|
struct snd_usb_stream *as; |
|
struct usb_mixer_interface *mixer; |
|
struct list_head *p; |
|
int err = 0; |
|
|
|
if (chip == USB_AUDIO_IFACE_UNUSED) |
|
return 0; |
|
|
|
atomic_inc(&chip->active); /* avoid autopm */ |
|
if (chip->num_suspended_intf > 1) |
|
goto out; |
|
|
|
list_for_each_entry(as, &chip->pcm_list, list) { |
|
err = snd_usb_pcm_resume(as); |
|
if (err < 0) |
|
goto err_out; |
|
} |
|
|
|
/* |
|
* ALSA leaves material resumption to user space |
|
* we just notify and restart the mixers |
|
*/ |
|
list_for_each_entry(mixer, &chip->mixer_list, list) { |
|
err = snd_usb_mixer_resume(mixer, reset_resume); |
|
if (err < 0) |
|
goto err_out; |
|
} |
|
|
|
list_for_each(p, &chip->midi_list) { |
|
snd_usbmidi_resume(p); |
|
} |
|
|
|
out: |
|
if (chip->num_suspended_intf == chip->system_suspend) { |
|
snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); |
|
chip->system_suspend = 0; |
|
} |
|
chip->num_suspended_intf--; |
|
|
|
err_out: |
|
atomic_dec(&chip->active); /* allow autopm after this point */ |
|
return err; |
|
} |
|
|
|
static int usb_audio_resume(struct usb_interface *intf) |
|
{ |
|
return __usb_audio_resume(intf, false); |
|
} |
|
|
|
static int usb_audio_reset_resume(struct usb_interface *intf) |
|
{ |
|
return __usb_audio_resume(intf, true); |
|
} |
|
#else |
|
#define usb_audio_suspend NULL |
|
#define usb_audio_resume NULL |
|
#define usb_audio_reset_resume NULL |
|
#endif /* CONFIG_PM */ |
|
|
|
static const struct usb_device_id usb_audio_ids [] = { |
|
#include "quirks-table.h" |
|
{ .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS), |
|
.bInterfaceClass = USB_CLASS_AUDIO, |
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL }, |
|
{ } /* Terminating entry */ |
|
}; |
|
MODULE_DEVICE_TABLE(usb, usb_audio_ids); |
|
|
|
/* |
|
* entry point for linux usb interface |
|
*/ |
|
|
|
static struct usb_driver usb_audio_driver = { |
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.name = "snd-usb-audio", |
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.probe = usb_audio_probe, |
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.disconnect = usb_audio_disconnect, |
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.suspend = usb_audio_suspend, |
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.resume = usb_audio_resume, |
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.reset_resume = usb_audio_reset_resume, |
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.id_table = usb_audio_ids, |
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.supports_autosuspend = 1, |
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}; |
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|
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module_usb_driver(usb_audio_driver);
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