^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * epautoconf.c -- endpoint autoconfiguration for usb gadget drivers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2004 David Brownell
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/usb/ch9.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/usb/gadget.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * usb_ep_autoconfig_ss() - choose an endpoint matching the ep
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * descriptor and ep companion descriptor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * @gadget: The device to which the endpoint must belong.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * @desc: Endpoint descriptor, with endpoint direction and transfer mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * initialized. For periodic transfers, the maximum packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * size must also be initialized. This is modified on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * @ep_comp: Endpoint companion descriptor, with the required
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * number of streams. Will be modified when the chosen EP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * supports a different number of streams.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * This routine replaces the usb_ep_autoconfig when needed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * superspeed enhancments. If such enhancemnets are required,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * the FD should call usb_ep_autoconfig_ss directly and provide
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * the additional ep_comp parameter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * By choosing an endpoint to use with the specified descriptor,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * this routine simplifies writing gadget drivers that work with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * multiple USB device controllers. The endpoint would be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * passed later to usb_ep_enable(), along with some descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * That second descriptor won't always be the same as the first one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * For example, isochronous endpoints can be autoconfigured for high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * bandwidth, and then used in several lower bandwidth altsettings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * Also, high and full speed descriptors will be different.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * Be sure to examine and test the results of autoconfiguration
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * on your hardware. This code may not make the best choices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * about how to use the USB controller, and it can't know all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * the restrictions that may apply. Some combinations of driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * and hardware won't be able to autoconfigure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * On success, this returns an claimed usb_ep, and modifies the endpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * is initialized as if the endpoint were used at full speed and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * the bmAttribute field in the ep companion descriptor is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * updated with the assigned number of streams if it is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * different from the original value. To prevent the endpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * from being returned by a later autoconfig call, claims it by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * assigning ep->claimed to true.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * On failure, this returns a null endpoint descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct usb_ep *usb_ep_autoconfig_ss(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct usb_gadget *gadget,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct usb_endpoint_descriptor *desc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct usb_ss_ep_comp_descriptor *ep_comp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct usb_ep *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) u8 type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (gadget->ops->match_ep) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) ep = gadget->ops->match_ep(gadget, desc, ep_comp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) goto found_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* Second, look at endpoints until an unclaimed one looks usable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) list_for_each_entry (ep, &gadget->ep_list, ep_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (usb_gadget_ep_match_desc(gadget, ep, desc, ep_comp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) goto found_ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) /* Fail */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) found_ep:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * If the protocol driver hasn't yet decided on wMaxPacketSize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * and wants to know the maximum possible, provide the info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (desc->wMaxPacketSize == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket_limit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) /* report address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) desc->bEndpointAddress &= USB_DIR_IN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (isdigit(ep->name[2])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) u8 num = simple_strtoul(&ep->name[2], NULL, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) desc->bEndpointAddress |= num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) } else if (desc->bEndpointAddress & USB_DIR_IN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (++gadget->in_epnum > 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) desc->bEndpointAddress = USB_DIR_IN | gadget->in_epnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (++gadget->out_epnum > 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) desc->bEndpointAddress |= gadget->out_epnum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) ep->address = desc->bEndpointAddress;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ep->desc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ep->comp_desc = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ep->claimed = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #if defined(CONFIG_ARCH_ROCKCHIP) && defined(CONFIG_NO_GKI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) ep->transfer_type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (gadget_is_superspeed(gadget) && ep_comp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) case USB_ENDPOINT_XFER_ISOC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /* mult: bits 1:0 of bmAttributes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) ep->mult = (ep_comp->bmAttributes & 0x3) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) case USB_ENDPOINT_XFER_BULK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) case USB_ENDPOINT_XFER_INT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) ep->maxburst = ep_comp->bMaxBurst + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) } else if (gadget_is_dualspeed(gadget) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) (type == USB_ENDPOINT_XFER_ISOC ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) type == USB_ENDPOINT_XFER_INT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) ep->mult = usb_endpoint_maxp_mult(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) EXPORT_SYMBOL_GPL(usb_ep_autoconfig_ss);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * usb_ep_autoconfig() - choose an endpoint matching the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * descriptor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @gadget: The device to which the endpoint must belong.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * @desc: Endpoint descriptor, with endpoint direction and transfer mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * initialized. For periodic transfers, the maximum packet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * size must also be initialized. This is modified on success.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * By choosing an endpoint to use with the specified descriptor, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * routine simplifies writing gadget drivers that work with multiple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * USB device controllers. The endpoint would be passed later to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * usb_ep_enable(), along with some descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * That second descriptor won't always be the same as the first one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * For example, isochronous endpoints can be autoconfigured for high
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * bandwidth, and then used in several lower bandwidth altsettings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * Also, high and full speed descriptors will be different.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * Be sure to examine and test the results of autoconfiguration on your
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * hardware. This code may not make the best choices about how to use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * USB controller, and it can't know all the restrictions that may apply.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * Some combinations of driver and hardware won't be able to autoconfigure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * On success, this returns an claimed usb_ep, and modifies the endpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * is initialized as if the endpoint were used at full speed. Because of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * that the users must consider adjusting the autoconfigured descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * To prevent the endpoint from being returned by a later autoconfig call,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * claims it by assigning ep->claimed to true.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * On failure, this returns a null endpoint descriptor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) struct usb_ep *usb_ep_autoconfig(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct usb_gadget *gadget,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) struct usb_endpoint_descriptor *desc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct usb_ep *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) u8 type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) ep = usb_ep_autoconfig_ss(gadget, desc, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if (!ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) /* report (variable) full speed bulk maxpacket */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (type == USB_ENDPOINT_XFER_BULK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int size = ep->maxpacket_limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /* min() doesn't work on bitfields with gcc-3.5 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (size > 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) size = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) desc->wMaxPacketSize = cpu_to_le16(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) EXPORT_SYMBOL_GPL(usb_ep_autoconfig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * usb_ep_autoconfig_release - releases endpoint and set it to initial state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * @ep: endpoint which should be released
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * This function can be used during function bind for endpoints obtained
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * from usb_ep_autoconfig(). It unclaims endpoint claimed by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * usb_ep_autoconfig() to make it available for other functions. Endpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * which was released is no longer invalid and shouldn't be used in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * context of function which released it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) void usb_ep_autoconfig_release(struct usb_ep *ep)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) ep->claimed = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) ep->driver_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) EXPORT_SYMBOL_GPL(usb_ep_autoconfig_release);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * usb_ep_autoconfig_reset - reset endpoint autoconfig state
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * @gadget: device for which autoconfig state will be reset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * Use this for devices where one configuration may need to assign
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * endpoint resources very differently from the next one. It clears
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * state such as ep->claimed and the record of assigned endpoints
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * used by usb_ep_autoconfig().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) void usb_ep_autoconfig_reset (struct usb_gadget *gadget)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct usb_ep *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) list_for_each_entry (ep, &gadget->ep_list, ep_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) ep->claimed = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) ep->driver_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) gadget->in_epnum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) gadget->out_epnum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) EXPORT_SYMBOL_GPL(usb_ep_autoconfig_reset);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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