diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/usb/card.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/usb/card.c | 729 |
1 files changed, 0 insertions, 729 deletions
diff --git a/ANDROID_3.4.5/sound/usb/card.c b/ANDROID_3.4.5/sound/usb/card.c deleted file mode 100644 index 4a7be7b9..00000000 --- a/ANDROID_3.4.5/sound/usb/card.c +++ /dev/null @@ -1,729 +0,0 @@ -/* - * (Tentative) USB Audio Driver for ALSA - * - * 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 <linux/bitops.h> -#include <linux/init.h> -#include <linux/list.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/ctype.h> -#include <linux/usb.h> -#include <linux/moduleparam.h> -#include <linux/mutex.h> -#include <linux/usb/audio.h> -#include <linux/usb/audio-v2.h> -#include <linux/module.h> - -#include <sound/control.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" -#include "card.h" -#include "midi.h" -#include "mixer.h" -#include "proc.h" -#include "quirks.h" -#include "endpoint.h" -#include "helper.h" -#include "debug.h" -#include "pcm.h" -#include "format.h" -#include "power.h" -#include "stream.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 bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */ -/* Vendor/product IDs for this card */ -static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; -static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; -static int nrpacks = 8; /* max. number of packets per urb */ -static bool async_unlink = 1; -static int device_setup[SNDRV_CARDS]; /* device parameter for this card */ -static bool ignore_ctl_error; - -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."); -module_param_array(device_setup, int, NULL, 0444); -MODULE_PARM_DESC(device_setup, "Specific device setup (if needed)."); -module_param(ignore_ctl_error, bool, 0444); -MODULE_PARM_DESC(ignore_ctl_error, - "Ignore errors from USB controller for mixer interfaces."); - -/* - * we keep the snd_usb_audio_t instances by ourselves for merging - * the all interfaces on the same card as one sound device. - */ - -static DEFINE_MUTEX(register_mutex); -static struct snd_usb_audio *usb_chip[SNDRV_CARDS]; -static struct usb_driver usb_audio_driver; - -/* - * disconnect streams - * called from snd_usb_audio_disconnect() - */ -static void snd_usb_stream_disconnect(struct list_head *head) -{ - int idx; - struct snd_usb_stream *as; - struct snd_usb_substream *subs; - - as = list_entry(head, struct snd_usb_stream, list); - for (idx = 0; idx < 2; idx++) { - subs = &as->substream[idx]; - if (!subs->num_formats) - continue; - snd_usb_release_substream_urbs(subs, 1); - subs->interface = -1; - } -} - -static int snd_usb_create_stream(struct snd_usb_audio *chip, int ctrlif, int interface) -{ - struct usb_device *dev = chip->dev; - struct usb_host_interface *alts; - struct usb_interface_descriptor *altsd; - struct usb_interface *iface = usb_ifnum_to_if(dev, interface); - - if (!iface) { - snd_printk(KERN_ERR "%d:%u:%d : does not exist\n", - dev->devnum, ctrlif, interface); - return -EINVAL; - } - - if (usb_interface_claimed(iface)) { - snd_printdd(KERN_INFO "%d:%d:%d: skipping, already claimed\n", - dev->devnum, ctrlif, interface); - return -EINVAL; - } - - 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_MIDISTREAMING) { - int err = snd_usbmidi_create(chip->card, iface, - &chip->midi_list, NULL); - if (err < 0) { - snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", - dev->devnum, ctrlif, interface); - return -EINVAL; - } - usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); - - return 0; - } - - if ((altsd->bInterfaceClass != USB_CLASS_AUDIO && - altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || - altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING) { - snd_printdd(KERN_ERR "%d:%u:%d: skipping non-supported interface %d\n", - dev->devnum, ctrlif, interface, altsd->bInterfaceClass); - /* skip non-supported classes */ - return -EINVAL; - } - - if (snd_usb_get_speed(dev) == USB_SPEED_LOW) { - snd_printk(KERN_ERR "low speed audio streaming not supported\n"); - return -EINVAL; - } - - if (! snd_usb_parse_audio_interface(chip, interface)) { - usb_set_interface(dev, interface, 0); /* reset the current interface */ - usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L); - return -EINVAL; - } - - return 0; -} - -/* - * parse audio control descriptor and create pcm/midi streams - */ -static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif) -{ - struct usb_device *dev = chip->dev; - struct usb_host_interface *host_iface; - struct usb_interface_descriptor *altsd; - void *control_header; - int i, protocol; - - /* find audiocontrol interface */ - host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; - control_header = snd_usb_find_csint_desc(host_iface->extra, - host_iface->extralen, - NULL, UAC_HEADER); - altsd = get_iface_desc(host_iface); - protocol = altsd->bInterfaceProtocol; - - if (!control_header) { - snd_printk(KERN_ERR "cannot find UAC_HEADER\n"); - return -EINVAL; - } - - switch (protocol) { - default: - snd_printdd(KERN_WARNING "unknown interface protocol %#02x, assuming v1\n", - protocol); - /* fall through */ - - case UAC_VERSION_1: { - struct uac1_ac_header_descriptor *h1 = control_header; - - if (!h1->bInCollection) { - snd_printk(KERN_INFO "skipping empty audio interface (v1)\n"); - return -EINVAL; - } - - if (h1->bLength < sizeof(*h1) + h1->bInCollection) { - snd_printk(KERN_ERR "invalid UAC_HEADER (v1)\n"); - return -EINVAL; - } - - for (i = 0; i < h1->bInCollection; i++) - snd_usb_create_stream(chip, ctrlif, h1->baInterfaceNr[i]); - - break; - } - - case UAC_VERSION_2: { - struct usb_interface_assoc_descriptor *assoc = - usb_ifnum_to_if(dev, ctrlif)->intf_assoc; - - if (!assoc) { - snd_printk(KERN_ERR "Audio class v2 interfaces need an interface association\n"); - return -EINVAL; - } - - for (i = 0; i < assoc->bInterfaceCount; i++) { - int intf = assoc->bFirstInterface + i; - - if (intf != ctrlif) - snd_usb_create_stream(chip, ctrlif, intf); - } - - break; - } - } - - return 0; -} - -/* - * free the chip instance - * - * here we have to do not much, since pcm and controls are already freed - * - */ - -static int snd_usb_audio_free(struct snd_usb_audio *chip) -{ - kfree(chip); - return 0; -} - -static int snd_usb_audio_dev_free(struct snd_device *device) -{ - struct snd_usb_audio *chip = device->device_data; - return snd_usb_audio_free(chip); -} - -static void remove_trailing_spaces(char *str) -{ - char *p; - - if (!*str) - return; - for (p = str + strlen(str) - 1; p >= str && isspace(*p); p--) - *p = 0; -} - -/* - * create a chip instance and set its names. - */ -static int snd_usb_audio_create(struct usb_device *dev, int idx, - const struct snd_usb_audio_quirk *quirk, - struct snd_usb_audio **rchip) -{ - struct snd_card *card; - struct snd_usb_audio *chip; - int err, len; - char component[14]; - static struct snd_device_ops ops = { - .dev_free = snd_usb_audio_dev_free, - }; - - *rchip = NULL; - - switch (snd_usb_get_speed(dev)) { - case USB_SPEED_LOW: - case USB_SPEED_FULL: - case USB_SPEED_HIGH: - case USB_SPEED_SUPER: - break; - default: - snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev)); - return -ENXIO; - } - - err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card); - if (err < 0) { - snd_printk(KERN_ERR "cannot create card instance %d\n", idx); - return err; - } - - chip = kzalloc(sizeof(*chip), GFP_KERNEL); - if (! chip) { - snd_card_free(card); - return -ENOMEM; - } - - mutex_init(&chip->shutdown_mutex); - chip->index = idx; - chip->dev = dev; - chip->card = card; - chip->setup = device_setup[idx]; - chip->nrpacks = nrpacks; - chip->async_unlink = async_unlink; - chip->probing = 1; - - 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 && *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)); - } - } - remove_trailing_spaces(card->shortname); - - /* retrieve the vendor and device strings as longname */ - if (quirk && quirk->vendor_name && *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) { - remove_trailing_spaces(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; - default: - break; - } - - 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 struct snd_usb_audio * -snd_usb_audio_probe(struct usb_device *dev, - struct usb_interface *intf, - const struct usb_device_id *usb_id) -{ - const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info; - int i, err; - struct snd_usb_audio *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; - - if (snd_usb_apply_boot_quirk(dev, intf, quirk) < 0) - goto __err_val; - - /* - * 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 (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]; - chip->probing = 1; - break; - } - } - if (! chip) { - /* it's a fresh one. - * now look for an empty slot and create a new card instance - */ - for (i = 0; i < SNDRV_CARDS; i++) - if (enable[i] && ! usb_chip[i] && - (vid[i] == -1 || vid[i] == 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); - chip->pm_intf = intf; - break; - } - if (!chip) { - printk(KERN_ERR "no available usb audio device\n"); - goto __error; - } - } - - /* - * 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 */ - if ((err = snd_usb_create_quirk(chip, intf, &usb_audio_driver, 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, ignore_ctl_error) < 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++; - chip->probing = 0; - mutex_unlock(®ister_mutex); - return chip; - - __error: - if (chip) { - if (!chip->num_interfaces) - snd_card_free(chip->card); - chip->probing = 0; - } - mutex_unlock(®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, - struct snd_usb_audio *chip) -{ - struct snd_card *card; - struct list_head *p; - - if (chip == (void *)-1L) - return; - - card = chip->card; - mutex_lock(®ister_mutex); - mutex_lock(&chip->shutdown_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; - mutex_unlock(&chip->shutdown_mutex); - mutex_unlock(®ister_mutex); - snd_card_free_when_closed(card); - } else { - mutex_unlock(&chip->shutdown_mutex); - mutex_unlock(®ister_mutex); - } -} - -/* - * new 2.5 USB kernel API - */ -static int usb_audio_probe(struct usb_interface *intf, - const struct usb_device_id *id) -{ - struct snd_usb_audio *chip; - chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id); - if (chip) { - usb_set_intfdata(intf, chip); - return 0; - } else - return -EIO; -} - -static void usb_audio_disconnect(struct usb_interface *intf) -{ - snd_usb_audio_disconnect(interface_to_usbdev(intf), - usb_get_intfdata(intf)); -} - -#ifdef CONFIG_PM - -int snd_usb_autoresume(struct snd_usb_audio *chip) -{ - int err = -ENODEV; - - if (!chip->shutdown && !chip->probing) - err = usb_autopm_get_interface(chip->pm_intf); - - return err; -} - -void snd_usb_autosuspend(struct snd_usb_audio *chip) -{ - if (!chip->shutdown && !chip->probing) - usb_autopm_put_interface(chip->pm_intf); -} - -static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message) -{ - struct snd_usb_audio *chip = usb_get_intfdata(intf); - struct list_head *p; - struct snd_usb_stream *as; - struct usb_mixer_interface *mixer; - - if (chip == (void *)-1L) - return 0; - - if (!PMSG_IS_AUTO(message)) { - snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot); - if (!chip->num_suspended_intf++) { - list_for_each(p, &chip->pcm_list) { - as = list_entry(p, struct snd_usb_stream, list); - snd_pcm_suspend_all(as->pcm); - } - } - } else { - /* - * otherwise we keep the rest of the system in the dark - * to keep this transparent - */ - if (!chip->num_suspended_intf++) - chip->autosuspended = 1; - } - - list_for_each_entry(mixer, &chip->mixer_list, list) - snd_usb_mixer_inactivate(mixer); - - return 0; -} - -static int usb_audio_resume(struct usb_interface *intf) -{ - struct snd_usb_audio *chip = usb_get_intfdata(intf); - struct usb_mixer_interface *mixer; - int err = 0; - - if (chip == (void *)-1L) - return 0; - if (--chip->num_suspended_intf) - return 0; - /* - * 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_activate(mixer); - if (err < 0) - goto err_out; - } - - if (!chip->autosuspended) - snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0); - chip->autosuspended = 0; - -err_out: - return err; -} -#else -#define usb_audio_suspend NULL -#define usb_audio_resume NULL -#endif /* CONFIG_PM */ - -static 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 = { - .name = "snd-usb-audio", - .probe = usb_audio_probe, - .disconnect = usb_audio_disconnect, - .suspend = usb_audio_suspend, - .resume = usb_audio_resume, - .id_table = usb_audio_ids, - .supports_autosuspend = 1, -}; - -static int __init snd_usb_audio_init(void) -{ - if (nrpacks < 1 || nrpacks > MAX_PACKS) { - printk(KERN_WARNING "invalid nrpacks value.\n"); - return -EINVAL; - } - return usb_register(&usb_audio_driver); -} - -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); |