494 lines
15 KiB
C
494 lines
15 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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//
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// Special handling for implicit feedback mode
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//
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#include <linux/init.h>
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#include <linux/usb.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 <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "usbaudio.h"
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#include "card.h"
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#include "helper.h"
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#include "pcm.h"
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#include "implicit.h"
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enum {
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IMPLICIT_FB_NONE,
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IMPLICIT_FB_GENERIC,
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IMPLICIT_FB_FIXED,
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IMPLICIT_FB_BOTH, /* generic playback + capture (for BOSS) */
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};
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struct snd_usb_implicit_fb_match {
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unsigned int id;
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unsigned int iface_class;
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unsigned int ep_num;
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unsigned int iface;
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int type;
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};
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#define IMPLICIT_FB_GENERIC_DEV(vend, prod) \
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{ .id = USB_ID(vend, prod), .type = IMPLICIT_FB_GENERIC }
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#define IMPLICIT_FB_FIXED_DEV(vend, prod, ep, ifnum) \
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{ .id = USB_ID(vend, prod), .type = IMPLICIT_FB_FIXED, .ep_num = (ep),\
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.iface = (ifnum) }
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#define IMPLICIT_FB_BOTH_DEV(vend, prod, ep, ifnum) \
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{ .id = USB_ID(vend, prod), .type = IMPLICIT_FB_BOTH, .ep_num = (ep),\
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.iface = (ifnum) }
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#define IMPLICIT_FB_SKIP_DEV(vend, prod) \
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{ .id = USB_ID(vend, prod), .type = IMPLICIT_FB_NONE }
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/* Implicit feedback quirk table for playback */
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static const struct snd_usb_implicit_fb_match playback_implicit_fb_quirks[] = {
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/* Fixed EP */
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/* FIXME: check the availability of generic matching */
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IMPLICIT_FB_FIXED_DEV(0x0763, 0x2030, 0x81, 3), /* M-Audio Fast Track C400 */
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IMPLICIT_FB_FIXED_DEV(0x0763, 0x2031, 0x81, 3), /* M-Audio Fast Track C600 */
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IMPLICIT_FB_FIXED_DEV(0x0763, 0x2080, 0x81, 2), /* M-Audio FastTrack Ultra */
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IMPLICIT_FB_FIXED_DEV(0x0763, 0x2081, 0x81, 2), /* M-Audio FastTrack Ultra */
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IMPLICIT_FB_FIXED_DEV(0x2466, 0x8010, 0x81, 2), /* Fractal Audio Axe-Fx III */
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IMPLICIT_FB_FIXED_DEV(0x31e9, 0x0001, 0x81, 2), /* Solid State Logic SSL2 */
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IMPLICIT_FB_FIXED_DEV(0x31e9, 0x0002, 0x81, 2), /* Solid State Logic SSL2+ */
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IMPLICIT_FB_FIXED_DEV(0x0499, 0x172f, 0x81, 2), /* Steinberg UR22C */
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IMPLICIT_FB_FIXED_DEV(0x0d9a, 0x00df, 0x81, 2), /* RTX6001 */
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IMPLICIT_FB_FIXED_DEV(0x22f0, 0x0006, 0x81, 3), /* Allen&Heath Qu-16 */
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IMPLICIT_FB_FIXED_DEV(0x1686, 0xf029, 0x82, 2), /* Zoom UAC-2 */
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IMPLICIT_FB_FIXED_DEV(0x2466, 0x8003, 0x86, 2), /* Fractal Audio Axe-Fx II */
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IMPLICIT_FB_FIXED_DEV(0x0499, 0x172a, 0x86, 2), /* Yamaha MODX */
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/* Special matching */
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{ .id = USB_ID(0x07fd, 0x0004), .iface_class = USB_CLASS_AUDIO,
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.type = IMPLICIT_FB_NONE }, /* MicroBook IIc */
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/* ep = 0x84, ifnum = 0 */
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{ .id = USB_ID(0x07fd, 0x0004), .iface_class = USB_CLASS_VENDOR_SPEC,
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.type = IMPLICIT_FB_FIXED,
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.ep_num = 0x84, .iface = 0 }, /* MOTU MicroBook II */
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{} /* terminator */
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};
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/* Implicit feedback quirk table for capture: only FIXED type */
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static const struct snd_usb_implicit_fb_match capture_implicit_fb_quirks[] = {
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{} /* terminator */
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};
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/* set up sync EP information on the audioformat */
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static int add_implicit_fb_sync_ep(struct snd_usb_audio *chip,
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struct audioformat *fmt,
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int ep, int ep_idx, int ifnum,
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const struct usb_host_interface *alts)
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{
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struct usb_interface *iface;
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if (!alts) {
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iface = usb_ifnum_to_if(chip->dev, ifnum);
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if (!iface || iface->num_altsetting < 2)
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return 0;
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alts = &iface->altsetting[1];
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}
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fmt->sync_ep = ep;
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fmt->sync_iface = ifnum;
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fmt->sync_altsetting = alts->desc.bAlternateSetting;
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fmt->sync_ep_idx = ep_idx;
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fmt->implicit_fb = 1;
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usb_audio_dbg(chip,
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"%d:%d: added %s implicit_fb sync_ep %x, iface %d:%d\n",
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fmt->iface, fmt->altsetting,
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(ep & USB_DIR_IN) ? "playback" : "capture",
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fmt->sync_ep, fmt->sync_iface, fmt->sync_altsetting);
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return 1;
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}
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/* Check whether the given UAC2 iface:altset points to an implicit fb source */
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static int add_generic_uac2_implicit_fb(struct snd_usb_audio *chip,
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struct audioformat *fmt,
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unsigned int ifnum,
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unsigned int altsetting)
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{
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struct usb_host_interface *alts;
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struct usb_endpoint_descriptor *epd;
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alts = snd_usb_get_host_interface(chip, ifnum, altsetting);
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if (!alts)
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return 0;
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if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO ||
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alts->desc.bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING ||
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alts->desc.bInterfaceProtocol != UAC_VERSION_2 ||
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alts->desc.bNumEndpoints < 1)
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return 0;
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epd = get_endpoint(alts, 0);
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if (!usb_endpoint_is_isoc_in(epd) ||
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(epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
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USB_ENDPOINT_USAGE_IMPLICIT_FB)
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return 0;
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return add_implicit_fb_sync_ep(chip, fmt, epd->bEndpointAddress, 0,
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ifnum, alts);
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}
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static bool roland_sanity_check_iface(struct usb_host_interface *alts)
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{
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if (alts->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
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(alts->desc.bInterfaceSubClass != 2 &&
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alts->desc.bInterfaceProtocol != 2) ||
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alts->desc.bNumEndpoints < 1)
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return false;
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return true;
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}
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/* Like the UAC2 case above, but specific to Roland with vendor class and hack */
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static int add_roland_implicit_fb(struct snd_usb_audio *chip,
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struct audioformat *fmt,
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struct usb_host_interface *alts)
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{
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struct usb_endpoint_descriptor *epd;
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if (!roland_sanity_check_iface(alts))
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return 0;
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/* only when both streams are with ASYNC type */
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epd = get_endpoint(alts, 0);
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if (!usb_endpoint_is_isoc_out(epd) ||
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(epd->bmAttributes & USB_ENDPOINT_SYNCTYPE) != USB_ENDPOINT_SYNC_ASYNC)
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return 0;
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/* check capture EP */
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alts = snd_usb_get_host_interface(chip,
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alts->desc.bInterfaceNumber + 1,
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alts->desc.bAlternateSetting);
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if (!alts || !roland_sanity_check_iface(alts))
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return 0;
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epd = get_endpoint(alts, 0);
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if (!usb_endpoint_is_isoc_in(epd) ||
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(epd->bmAttributes & USB_ENDPOINT_SYNCTYPE) != USB_ENDPOINT_SYNC_ASYNC)
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return 0;
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chip->quirk_flags |= QUIRK_FLAG_PLAYBACK_FIRST;
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return add_implicit_fb_sync_ep(chip, fmt, epd->bEndpointAddress, 0,
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alts->desc.bInterfaceNumber, alts);
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}
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/* capture quirk for Roland device; always full-duplex */
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static int add_roland_capture_quirk(struct snd_usb_audio *chip,
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struct audioformat *fmt,
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struct usb_host_interface *alts)
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{
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struct usb_endpoint_descriptor *epd;
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if (!roland_sanity_check_iface(alts))
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return 0;
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epd = get_endpoint(alts, 0);
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if (!usb_endpoint_is_isoc_in(epd) ||
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(epd->bmAttributes & USB_ENDPOINT_SYNCTYPE) != USB_ENDPOINT_SYNC_ASYNC)
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return 0;
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alts = snd_usb_get_host_interface(chip,
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alts->desc.bInterfaceNumber - 1,
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alts->desc.bAlternateSetting);
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if (!alts || !roland_sanity_check_iface(alts))
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return 0;
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epd = get_endpoint(alts, 0);
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if (!usb_endpoint_is_isoc_out(epd))
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return 0;
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return add_implicit_fb_sync_ep(chip, fmt, epd->bEndpointAddress, 0,
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alts->desc.bInterfaceNumber, alts);
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}
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/* Playback and capture EPs on Pioneer devices share the same iface/altset
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* for the implicit feedback operation
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*/
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static bool is_pioneer_implicit_fb(struct snd_usb_audio *chip,
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struct usb_host_interface *alts)
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{
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struct usb_endpoint_descriptor *epd;
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if (USB_ID_VENDOR(chip->usb_id) != 0x2b73 &&
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USB_ID_VENDOR(chip->usb_id) != 0x08e4)
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return false;
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if (alts->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
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return false;
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if (alts->desc.bNumEndpoints != 2)
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return false;
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epd = get_endpoint(alts, 0);
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if (!usb_endpoint_is_isoc_out(epd) ||
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(epd->bmAttributes & USB_ENDPOINT_SYNCTYPE) != USB_ENDPOINT_SYNC_ASYNC)
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return false;
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epd = get_endpoint(alts, 1);
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if (!usb_endpoint_is_isoc_in(epd) ||
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(epd->bmAttributes & USB_ENDPOINT_SYNCTYPE) != USB_ENDPOINT_SYNC_ASYNC ||
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((epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
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USB_ENDPOINT_USAGE_DATA &&
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(epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) !=
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USB_ENDPOINT_USAGE_IMPLICIT_FB))
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return false;
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return true;
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}
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static int __add_generic_implicit_fb(struct snd_usb_audio *chip,
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struct audioformat *fmt,
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int iface, int altset)
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{
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struct usb_host_interface *alts;
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struct usb_endpoint_descriptor *epd;
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alts = snd_usb_get_host_interface(chip, iface, altset);
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if (!alts)
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return 0;
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if ((alts->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC &&
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alts->desc.bInterfaceClass != USB_CLASS_AUDIO) ||
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alts->desc.bNumEndpoints < 1)
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return 0;
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epd = get_endpoint(alts, 0);
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if (!usb_endpoint_is_isoc_in(epd) ||
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(epd->bmAttributes & USB_ENDPOINT_SYNCTYPE) != USB_ENDPOINT_SYNC_ASYNC)
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return 0;
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return add_implicit_fb_sync_ep(chip, fmt, epd->bEndpointAddress, 0,
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iface, alts);
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}
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/* More generic quirk: look for the sync EP next to the data EP */
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static int add_generic_implicit_fb(struct snd_usb_audio *chip,
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struct audioformat *fmt,
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struct usb_host_interface *alts)
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{
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if ((fmt->ep_attr & USB_ENDPOINT_SYNCTYPE) != USB_ENDPOINT_SYNC_ASYNC)
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return 0;
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if (__add_generic_implicit_fb(chip, fmt,
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alts->desc.bInterfaceNumber + 1,
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alts->desc.bAlternateSetting))
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return 1;
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return __add_generic_implicit_fb(chip, fmt,
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alts->desc.bInterfaceNumber - 1,
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alts->desc.bAlternateSetting);
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}
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static const struct snd_usb_implicit_fb_match *
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find_implicit_fb_entry(struct snd_usb_audio *chip,
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const struct snd_usb_implicit_fb_match *match,
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const struct usb_host_interface *alts)
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{
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for (; match->id; match++)
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if (match->id == chip->usb_id &&
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(!match->iface_class ||
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(alts->desc.bInterfaceClass == match->iface_class)))
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return match;
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return NULL;
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}
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/* Setup an implicit feedback endpoint from a quirk. Returns 0 if no quirk
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* applies. Returns 1 if a quirk was found.
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*/
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static int audioformat_implicit_fb_quirk(struct snd_usb_audio *chip,
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struct audioformat *fmt,
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struct usb_host_interface *alts)
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{
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const struct snd_usb_implicit_fb_match *p;
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unsigned int attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
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p = find_implicit_fb_entry(chip, playback_implicit_fb_quirks, alts);
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if (p) {
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switch (p->type) {
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case IMPLICIT_FB_GENERIC:
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return add_generic_implicit_fb(chip, fmt, alts);
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case IMPLICIT_FB_NONE:
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return 0; /* No quirk */
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case IMPLICIT_FB_FIXED:
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return add_implicit_fb_sync_ep(chip, fmt, p->ep_num, 0,
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p->iface, NULL);
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}
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}
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/* Special handling for devices with capture quirks */
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p = find_implicit_fb_entry(chip, capture_implicit_fb_quirks, alts);
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if (p) {
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switch (p->type) {
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case IMPLICIT_FB_FIXED:
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return 0; /* no quirk */
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case IMPLICIT_FB_BOTH:
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chip->quirk_flags |= QUIRK_FLAG_PLAYBACK_FIRST;
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return add_generic_implicit_fb(chip, fmt, alts);
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}
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}
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/* Generic UAC2 implicit feedback */
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if (attr == USB_ENDPOINT_SYNC_ASYNC &&
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alts->desc.bInterfaceClass == USB_CLASS_AUDIO &&
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alts->desc.bInterfaceProtocol == UAC_VERSION_2 &&
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alts->desc.bNumEndpoints == 1) {
|
||
|
|
if (add_generic_uac2_implicit_fb(chip, fmt,
|
||
|
|
alts->desc.bInterfaceNumber + 1,
|
||
|
|
alts->desc.bAlternateSetting))
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Roland/BOSS implicit feedback with vendor spec class */
|
||
|
|
if (USB_ID_VENDOR(chip->usb_id) == 0x0582) {
|
||
|
|
if (add_roland_implicit_fb(chip, fmt, alts) > 0)
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Pioneer devices with vendor spec class */
|
||
|
|
if (is_pioneer_implicit_fb(chip, alts)) {
|
||
|
|
chip->quirk_flags |= QUIRK_FLAG_PLAYBACK_FIRST;
|
||
|
|
return add_implicit_fb_sync_ep(chip, fmt,
|
||
|
|
get_endpoint(alts, 1)->bEndpointAddress,
|
||
|
|
1, alts->desc.bInterfaceNumber,
|
||
|
|
alts);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Try the generic implicit fb if available */
|
||
|
|
if (chip->generic_implicit_fb ||
|
||
|
|
(chip->quirk_flags & QUIRK_FLAG_GENERIC_IMPLICIT_FB))
|
||
|
|
return add_generic_implicit_fb(chip, fmt, alts);
|
||
|
|
|
||
|
|
/* No quirk */
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* same for capture, but only handling FIXED entry */
|
||
|
|
static int audioformat_capture_quirk(struct snd_usb_audio *chip,
|
||
|
|
struct audioformat *fmt,
|
||
|
|
struct usb_host_interface *alts)
|
||
|
|
{
|
||
|
|
const struct snd_usb_implicit_fb_match *p;
|
||
|
|
|
||
|
|
p = find_implicit_fb_entry(chip, capture_implicit_fb_quirks, alts);
|
||
|
|
if (p && (p->type == IMPLICIT_FB_FIXED || p->type == IMPLICIT_FB_BOTH))
|
||
|
|
return add_implicit_fb_sync_ep(chip, fmt, p->ep_num, 0,
|
||
|
|
p->iface, NULL);
|
||
|
|
|
||
|
|
/* Roland/BOSS need full-duplex streams */
|
||
|
|
if (USB_ID_VENDOR(chip->usb_id) == 0x0582) {
|
||
|
|
if (add_roland_capture_quirk(chip, fmt, alts) > 0)
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (is_pioneer_implicit_fb(chip, alts))
|
||
|
|
return 1; /* skip the quirk, also don't handle generic sync EP */
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Parse altset and set up implicit feedback endpoint on the audioformat
|
||
|
|
*/
|
||
|
|
int snd_usb_parse_implicit_fb_quirk(struct snd_usb_audio *chip,
|
||
|
|
struct audioformat *fmt,
|
||
|
|
struct usb_host_interface *alts)
|
||
|
|
{
|
||
|
|
if (chip->quirk_flags & QUIRK_FLAG_SKIP_IMPLICIT_FB)
|
||
|
|
return 0;
|
||
|
|
if (fmt->endpoint & USB_DIR_IN)
|
||
|
|
return audioformat_capture_quirk(chip, fmt, alts);
|
||
|
|
else
|
||
|
|
return audioformat_implicit_fb_quirk(chip, fmt, alts);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return the score of matching two audioformats.
|
||
|
|
* Veto the audioformat if:
|
||
|
|
* - It has no channels for some reason.
|
||
|
|
* - Requested PCM format is not supported.
|
||
|
|
* - Requested sample rate is not supported.
|
||
|
|
*/
|
||
|
|
static int match_endpoint_audioformats(struct snd_usb_substream *subs,
|
||
|
|
const struct audioformat *fp,
|
||
|
|
int rate, int channels,
|
||
|
|
snd_pcm_format_t pcm_format)
|
||
|
|
{
|
||
|
|
int i, score;
|
||
|
|
|
||
|
|
if (fp->channels < 1)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (!(fp->formats & pcm_format_to_bits(pcm_format)))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
|
||
|
|
if (rate < fp->rate_min || rate > fp->rate_max)
|
||
|
|
return 0;
|
||
|
|
} else {
|
||
|
|
for (i = 0; i < fp->nr_rates; i++) {
|
||
|
|
if (fp->rate_table[i] == rate)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (i >= fp->nr_rates)
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
score = 1;
|
||
|
|
if (fp->channels == channels)
|
||
|
|
score++;
|
||
|
|
|
||
|
|
return score;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct snd_usb_substream *
|
||
|
|
find_matching_substream(struct snd_usb_audio *chip, int stream, int ep_num,
|
||
|
|
int fmt_type)
|
||
|
|
{
|
||
|
|
struct snd_usb_stream *as;
|
||
|
|
struct snd_usb_substream *subs;
|
||
|
|
|
||
|
|
list_for_each_entry(as, &chip->pcm_list, list) {
|
||
|
|
subs = &as->substream[stream];
|
||
|
|
if (as->fmt_type == fmt_type && subs->ep_num == ep_num)
|
||
|
|
return subs;
|
||
|
|
}
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return the audioformat that is suitable for the implicit fb
|
||
|
|
*/
|
||
|
|
const struct audioformat *
|
||
|
|
snd_usb_find_implicit_fb_sync_format(struct snd_usb_audio *chip,
|
||
|
|
const struct audioformat *target,
|
||
|
|
const struct snd_pcm_hw_params *params,
|
||
|
|
int stream,
|
||
|
|
bool *fixed_rate)
|
||
|
|
{
|
||
|
|
struct snd_usb_substream *subs;
|
||
|
|
const struct audioformat *fp, *sync_fmt = NULL;
|
||
|
|
int score, high_score;
|
||
|
|
|
||
|
|
/* Use the original audioformat as fallback for the shared altset */
|
||
|
|
if (target->iface == target->sync_iface &&
|
||
|
|
target->altsetting == target->sync_altsetting)
|
||
|
|
sync_fmt = target;
|
||
|
|
|
||
|
|
subs = find_matching_substream(chip, stream, target->sync_ep,
|
||
|
|
target->fmt_type);
|
||
|
|
if (!subs)
|
||
|
|
goto end;
|
||
|
|
|
||
|
|
high_score = 0;
|
||
|
|
list_for_each_entry(fp, &subs->fmt_list, list) {
|
||
|
|
score = match_endpoint_audioformats(subs, fp,
|
||
|
|
params_rate(params),
|
||
|
|
params_channels(params),
|
||
|
|
params_format(params));
|
||
|
|
if (score > high_score) {
|
||
|
|
sync_fmt = fp;
|
||
|
|
high_score = score;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
end:
|
||
|
|
if (fixed_rate)
|
||
|
|
*fixed_rate = snd_usb_pcm_has_fixed_rate(subs);
|
||
|
|
return sync_fmt;
|
||
|
|
}
|
||
|
|
|