diff options
Diffstat (limited to 'sound/usb/helper.c')
| -rw-r--r-- | sound/usb/helper.c | 64 |
1 files changed, 50 insertions, 14 deletions
diff --git a/sound/usb/helper.c b/sound/usb/helper.c index 620902463c6e..497d2b27fb59 100644 --- a/sound/usb/helper.c +++ b/sound/usb/helper.c @@ -1,18 +1,5 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * */ #include <linux/init.h> @@ -75,6 +62,7 @@ void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype } return NULL; } +EXPORT_SYMBOL_GPL(snd_usb_find_csint_desc); /* * Wrapper for usb_control_msg(). @@ -88,6 +76,9 @@ int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request, void *buf = NULL; int timeout; + if (usb_pipe_type_check(dev, pipe)) + return -EINVAL; + if (size > 0) { buf = kmemdup(data, size, GFP_KERNEL); if (!buf) @@ -119,6 +110,7 @@ unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip, switch (snd_usb_get_speed(chip->dev)) { case USB_SPEED_HIGH: case USB_SPEED_SUPER: + case USB_SPEED_SUPER_PLUS: if (get_endpoint(alts, 0)->bInterval >= 1 && get_endpoint(alts, 0)->bInterval <= 4) return get_endpoint(alts, 0)->bInterval - 1; @@ -129,3 +121,47 @@ unsigned char snd_usb_parse_datainterval(struct snd_usb_audio *chip, return 0; } +struct usb_host_interface * +snd_usb_get_host_interface(struct snd_usb_audio *chip, int ifnum, int altsetting) +{ + struct usb_interface *iface; + + iface = usb_ifnum_to_if(chip->dev, ifnum); + if (!iface) + return NULL; + return usb_altnum_to_altsetting(iface, altsetting); +} + +int snd_usb_add_ctrl_interface_link(struct snd_usb_audio *chip, int ifnum, + int ctrlif) +{ + struct usb_device *dev = chip->dev; + struct usb_host_interface *host_iface; + + if (chip->num_intf_to_ctrl >= MAX_CARD_INTERFACES) { + dev_info(&dev->dev, "Too many interfaces assigned to the single USB-audio card\n"); + return -EINVAL; + } + + /* find audiocontrol interface */ + host_iface = &usb_ifnum_to_if(dev, ctrlif)->altsetting[0]; + + chip->intf_to_ctrl[chip->num_intf_to_ctrl].interface = ifnum; + chip->intf_to_ctrl[chip->num_intf_to_ctrl].ctrl_intf = host_iface; + chip->num_intf_to_ctrl++; + + return 0; +} + +struct usb_host_interface *snd_usb_find_ctrl_interface(struct snd_usb_audio *chip, + int ifnum) +{ + int i; + + for (i = 0; i < chip->num_intf_to_ctrl; ++i) + if (chip->intf_to_ctrl[i].interface == ifnum) + return chip->intf_to_ctrl[i].ctrl_intf; + + /* Fallback to first audiocontrol interface */ + return chip->ctrl_intf; +} |