#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
-#include "gadget_chips.h"
-
-/*
- * This should work with endpoints from controller drivers sharing the
- * same endpoint naming convention. By example:
- *
- * - ep1, ep2, ... address is fixed, not direction or type
- * - ep1in, ep2out, ... address and direction are fixed, not type
- * - ep1-bulk, ep2-bulk, ... address and type are fixed, not direction
- * - ep1in-bulk, ep2out-iso, ... all three are fixed
- * - ep-* ... no functionality restrictions
- *
- * Type suffixes are "-bulk", "-iso", or "-int". Numbers are decimal.
- * Less common restrictions are implied by gadget_is_*().
- *
- * NOTE: each endpoint is unidirectional, as specified by its USB
- * descriptor; and isn't specific to a configuration or altsetting.
- */
-static int
-ep_matches (
- struct usb_gadget *gadget,
- struct usb_ep *ep,
- struct usb_endpoint_descriptor *desc,
- struct usb_ss_ep_comp_descriptor *ep_comp
-)
-{
- u8 type;
- const char *tmp;
- u16 max;
-
- int num_req_streams = 0;
-
- /* endpoint already claimed? */
- if (NULL != ep->driver_data)
- return 0;
-
- /* only support ep0 for portable CONTROL traffic */
- type = usb_endpoint_type(desc);
- if (USB_ENDPOINT_XFER_CONTROL == type)
- return 0;
-
- /* some other naming convention */
- if ('e' != ep->name[0])
- return 0;
-
- /* type-restriction: "-iso", "-bulk", or "-int".
- * direction-restriction: "in", "out".
- */
- if ('-' != ep->name[2]) {
- tmp = strrchr (ep->name, '-');
- if (tmp) {
- switch (type) {
- case USB_ENDPOINT_XFER_INT:
- /* bulk endpoints handle interrupt transfers,
- * except the toggle-quirky iso-synch kind
- */
- if ('s' == tmp[2]) // == "-iso"
- return 0;
- /* for now, avoid PXA "interrupt-in";
- * it's documented as never using DATA1.
- */
- if (gadget_is_pxa (gadget)
- && 'i' == tmp [1])
- return 0;
- break;
- case USB_ENDPOINT_XFER_BULK:
- if ('b' != tmp[1]) // != "-bulk"
- return 0;
- break;
- case USB_ENDPOINT_XFER_ISOC:
- if ('s' != tmp[2]) // != "-iso"
- return 0;
- }
- } else {
- tmp = ep->name + strlen (ep->name);
- }
-
- /* direction-restriction: "..in-..", "out-.." */
- tmp--;
- if (!isdigit (*tmp)) {
- if (desc->bEndpointAddress & USB_DIR_IN) {
- if ('n' != *tmp)
- return 0;
- } else {
- if ('t' != *tmp)
- return 0;
- }
- }
- }
-
- /*
- * Get the number of required streams from the EP companion
- * descriptor and see if the EP matches it
- */
- if (usb_endpoint_xfer_bulk(desc)) {
- if (ep_comp && gadget->max_speed >= USB_SPEED_SUPER) {
- num_req_streams = ep_comp->bmAttributes & 0x1f;
- if (num_req_streams > ep->max_streams)
- return 0;
- }
-
- }
-
- /*
- * If the protocol driver hasn't yet decided on wMaxPacketSize
- * and wants to know the maximum possible, provide the info.
- */
- if (desc->wMaxPacketSize == 0)
- desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket_limit);
-
- /* endpoint maxpacket size is an input parameter, except for bulk
- * where it's an output parameter representing the full speed limit.
- * the usb spec fixes high speed bulk maxpacket at 512 bytes.
- */
- max = 0x7ff & usb_endpoint_maxp(desc);
- switch (type) {
- case USB_ENDPOINT_XFER_INT:
- /* INT: limit 64 bytes full speed, 1024 high/super speed */
- if (!gadget_is_dualspeed(gadget) && max > 64)
- return 0;
- /* FALLTHROUGH */
-
- case USB_ENDPOINT_XFER_ISOC:
- /* ISO: limit 1023 bytes full speed, 1024 high/super speed */
- if (ep->maxpacket_limit < max)
- return 0;
- if (!gadget_is_dualspeed(gadget) && max > 1023)
- return 0;
-
- /* BOTH: "high bandwidth" works only at high speed */
- if ((desc->wMaxPacketSize & cpu_to_le16(3<<11))) {
- if (!gadget_is_dualspeed(gadget))
- return 0;
- /* configure your hardware with enough buffering!! */
- }
- break;
- }
-
- /* MATCH!! */
-
- /* report address */
- desc->bEndpointAddress &= USB_DIR_IN;
- if (isdigit (ep->name [2])) {
- u8 num = simple_strtoul (&ep->name [2], NULL, 10);
- desc->bEndpointAddress |= num;
- } else if (desc->bEndpointAddress & USB_DIR_IN) {
- if (++gadget->in_epnum > 15)
- return 0;
- desc->bEndpointAddress = USB_DIR_IN | gadget->in_epnum;
- } else {
- if (++gadget->out_epnum > 15)
- return 0;
- desc->bEndpointAddress |= gadget->out_epnum;
- }
-
- /* report (variable) full speed bulk maxpacket */
- if ((USB_ENDPOINT_XFER_BULK == type) && !ep_comp) {
- int size = ep->maxpacket_limit;
-
- /* min() doesn't work on bitfields with gcc-3.5 */
- if (size > 64)
- size = 64;
- desc->wMaxPacketSize = cpu_to_le16(size);
- }
- ep->address = desc->bEndpointAddress;
- return 1;
-}
-
-static struct usb_ep *
-find_ep (struct usb_gadget *gadget, const char *name)
-{
- struct usb_ep *ep;
-
- list_for_each_entry (ep, &gadget->ep_list, ep_list) {
- if (0 == strcmp (ep->name, name))
- return ep;
- }
- return NULL;
-}
-
/**
* usb_ep_autoconfig_ss() - choose an endpoint matching the ep
* descriptor and ep companion descriptor
* the restrictions that may apply. Some combinations of driver
* and hardware won't be able to autoconfigure.
*
- * On success, this returns an un-claimed usb_ep, and modifies the endpoint
+ * On success, this returns an claimed usb_ep, and modifies the endpoint
* descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
* is initialized as if the endpoint were used at full speed and
* the bmAttribute field in the ep companion descriptor is
* updated with the assigned number of streams if it is
* different from the original value. To prevent the endpoint
- * from being returned by a later autoconfig call, claim it by
- * assigning ep->driver_data to some non-null value.
+ * from being returned by a later autoconfig call, claims it by
+ * assigning ep->claimed to true.
*
* On failure, this returns a null endpoint descriptor.
*/
type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
- /* First, apply chip-specific "best usage" knowledge.
- * This might make a good usb_gadget_ops hook ...
- */
- if (gadget_is_net2280 (gadget) && type == USB_ENDPOINT_XFER_INT) {
- /* ep-e, ep-f are PIO with only 64 byte fifos */
- ep = find_ep (gadget, "ep-e");
- if (ep && ep_matches(gadget, ep, desc, ep_comp))
+ if (gadget->ops->match_ep) {
+ ep = gadget->ops->match_ep(gadget, desc, ep_comp);
+ if (ep)
goto found_ep;
- ep = find_ep (gadget, "ep-f");
- if (ep && ep_matches(gadget, ep, desc, ep_comp))
- goto found_ep;
-
- } else if (gadget_is_goku (gadget)) {
- if (USB_ENDPOINT_XFER_INT == type) {
- /* single buffering is enough */
- ep = find_ep(gadget, "ep3-bulk");
- if (ep && ep_matches(gadget, ep, desc, ep_comp))
- goto found_ep;
- } else if (USB_ENDPOINT_XFER_BULK == type
- && (USB_DIR_IN & desc->bEndpointAddress)) {
- /* DMA may be available */
- ep = find_ep(gadget, "ep2-bulk");
- if (ep && ep_matches(gadget, ep, desc,
- ep_comp))
- goto found_ep;
- }
-
-#ifdef CONFIG_BLACKFIN
- } else if (gadget_is_musbhdrc(gadget)) {
- if ((USB_ENDPOINT_XFER_BULK == type) ||
- (USB_ENDPOINT_XFER_ISOC == type)) {
- if (USB_DIR_IN & desc->bEndpointAddress)
- ep = find_ep (gadget, "ep5in");
- else
- ep = find_ep (gadget, "ep6out");
- } else if (USB_ENDPOINT_XFER_INT == type) {
- if (USB_DIR_IN & desc->bEndpointAddress)
- ep = find_ep(gadget, "ep1in");
- else
- ep = find_ep(gadget, "ep2out");
- } else
- ep = NULL;
- if (ep && ep_matches(gadget, ep, desc, ep_comp))
- goto found_ep;
-#endif
}
/* Second, look at endpoints until an unclaimed one looks usable */
list_for_each_entry (ep, &gadget->ep_list, ep_list) {
- if (ep_matches(gadget, ep, desc, ep_comp))
+ if (usb_gadget_ep_match_desc(gadget, ep, desc, ep_comp))
goto found_ep;
}
/* Fail */
return NULL;
found_ep:
+
+ /*
+ * If the protocol driver hasn't yet decided on wMaxPacketSize
+ * and wants to know the maximum possible, provide the info.
+ */
+ if (desc->wMaxPacketSize == 0)
+ desc->wMaxPacketSize = cpu_to_le16(ep->maxpacket_limit);
+
+ /* report address */
+ desc->bEndpointAddress &= USB_DIR_IN;
+ if (isdigit(ep->name[2])) {
+ u8 num = simple_strtoul(&ep->name[2], NULL, 10);
+ desc->bEndpointAddress |= num;
+ } else if (desc->bEndpointAddress & USB_DIR_IN) {
+ if (++gadget->in_epnum > 15)
+ return NULL;
+ desc->bEndpointAddress = USB_DIR_IN | gadget->in_epnum;
+ } else {
+ if (++gadget->out_epnum > 15)
+ return NULL;
+ desc->bEndpointAddress |= gadget->out_epnum;
+ }
+
+ /* report (variable) full speed bulk maxpacket */
+ if ((type == USB_ENDPOINT_XFER_BULK) && !ep_comp) {
+ int size = ep->maxpacket_limit;
+
+ /* min() doesn't work on bitfields with gcc-3.5 */
+ if (size > 64)
+ size = 64;
+ desc->wMaxPacketSize = cpu_to_le16(size);
+ }
+
+ ep->address = desc->bEndpointAddress;
ep->desc = NULL;
ep->comp_desc = NULL;
+ ep->claimed = true;
return ep;
}
EXPORT_SYMBOL_GPL(usb_ep_autoconfig_ss);
* USB controller, and it can't know all the restrictions that may apply.
* Some combinations of driver and hardware won't be able to autoconfigure.
*
- * On success, this returns an un-claimed usb_ep, and modifies the endpoint
+ * On success, this returns an claimed usb_ep, and modifies the endpoint
* descriptor bEndpointAddress. For bulk endpoints, the wMaxPacket value
* is initialized as if the endpoint were used at full speed. To prevent
- * the endpoint from being returned by a later autoconfig call, claim it
- * by assigning ep->driver_data to some non-null value.
+ * the endpoint from being returned by a later autoconfig call, claims it
+ * by assigning ep->claimed to true.
*
* On failure, this returns a null endpoint descriptor.
*/
}
EXPORT_SYMBOL_GPL(usb_ep_autoconfig);
+/**
+ * usb_ep_autoconfig_release - releases endpoint and set it to initial state
+ * @ep: endpoint which should be released
+ *
+ * This function can be used during function bind for endpoints obtained
+ * from usb_ep_autoconfig(). It unclaims endpoint claimed by
+ * usb_ep_autoconfig() to make it available for other functions. Endpoint
+ * which was released is no longer invalid and shouldn't be used in
+ * context of function which released it.
+ */
+void usb_ep_autoconfig_release(struct usb_ep *ep)
+{
+ ep->claimed = false;
+ ep->driver_data = NULL;
+}
+EXPORT_SYMBOL_GPL(usb_ep_autoconfig_release);
+
/**
* usb_ep_autoconfig_reset - reset endpoint autoconfig state
* @gadget: device for which autoconfig state will be reset
*
* Use this for devices where one configuration may need to assign
* endpoint resources very differently from the next one. It clears
- * state such as ep->driver_data and the record of assigned endpoints
+ * state such as ep->claimed and the record of assigned endpoints
* used by usb_ep_autoconfig().
*/
void usb_ep_autoconfig_reset (struct usb_gadget *gadget)
struct usb_ep *ep;
list_for_each_entry (ep, &gadget->ep_list, ep_list) {
+ ep->claimed = false;
ep->driver_data = NULL;
}
gadget->in_epnum = 0;
Code Review / kvmfornfv.git / blobdiff