Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Tento commit je obsažen v:
Linus Torvalds
310
drivers/usb/gadget/epautoconf.c
Normální soubor
310
drivers/usb/gadget/epautoconf.c
Normální soubor
@@ -0,0 +1,310 @@
|
||||
/*
|
||||
* epautoconf.c -- endpoint autoconfiguration for usb gadget drivers
|
||||
*
|
||||
* Copyright (C) 2004 David Brownell
|
||||
*
|
||||
* 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/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/device.h>
|
||||
|
||||
#include <linux/ctype.h>
|
||||
#include <linux/string.h>
|
||||
|
||||
#include <linux/usb_ch9.h>
|
||||
#include <linux/usb_gadget.h>
|
||||
|
||||
#include "gadget_chips.h"
|
||||
|
||||
|
||||
/* we must assign addresses for configurable endpoints (like net2280) */
|
||||
static __initdata unsigned epnum;
|
||||
|
||||
// #define MANY_ENDPOINTS
|
||||
#ifdef MANY_ENDPOINTS
|
||||
/* more than 15 configurable endpoints */
|
||||
static __initdata unsigned in_epnum;
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* 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 __init
|
||||
ep_matches (
|
||||
struct usb_gadget *gadget,
|
||||
struct usb_ep *ep,
|
||||
struct usb_endpoint_descriptor *desc
|
||||
)
|
||||
{
|
||||
u8 type;
|
||||
const char *tmp;
|
||||
u16 max;
|
||||
|
||||
/* endpoint already claimed? */
|
||||
if (0 != ep->driver_data)
|
||||
return 0;
|
||||
|
||||
/* only support ep0 for portable CONTROL traffic */
|
||||
type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
|
||||
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;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* 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 & le16_to_cpup (&desc->wMaxPacketSize);
|
||||
switch (type) {
|
||||
case USB_ENDPOINT_XFER_INT:
|
||||
/* INT: limit 64 bytes full speed, 1024 high speed */
|
||||
if (!gadget->is_dualspeed && max > 64)
|
||||
return 0;
|
||||
/* FALLTHROUGH */
|
||||
|
||||
case USB_ENDPOINT_XFER_ISOC:
|
||||
/* ISO: limit 1023 bytes full speed, 1024 high speed */
|
||||
if (ep->maxpacket < max)
|
||||
return 0;
|
||||
if (!gadget->is_dualspeed && max > 1023)
|
||||
return 0;
|
||||
|
||||
/* BOTH: "high bandwidth" works only at high speed */
|
||||
if ((desc->wMaxPacketSize & __constant_cpu_to_le16(3<<11))) {
|
||||
if (!gadget->is_dualspeed)
|
||||
return 0;
|
||||
/* configure your hardware with enough buffering!! */
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
/* MATCH!! */
|
||||
|
||||
/* report address */
|
||||
if (isdigit (ep->name [2])) {
|
||||
u8 num = simple_strtol (&ep->name [2], NULL, 10);
|
||||
desc->bEndpointAddress |= num;
|
||||
#ifdef MANY_ENDPOINTS
|
||||
} else if (desc->bEndpointAddress & USB_DIR_IN) {
|
||||
if (++in_epnum > 15)
|
||||
return 0;
|
||||
desc->bEndpointAddress = USB_DIR_IN | in_epnum;
|
||||
#endif
|
||||
} else {
|
||||
if (++epnum > 15)
|
||||
return 0;
|
||||
desc->bEndpointAddress |= epnum;
|
||||
}
|
||||
|
||||
/* report (variable) full speed bulk maxpacket */
|
||||
if (USB_ENDPOINT_XFER_BULK == type) {
|
||||
int size = ep->maxpacket;
|
||||
|
||||
/* min() doesn't work on bitfields with gcc-3.5 */
|
||||
if (size > 64)
|
||||
size = 64;
|
||||
desc->wMaxPacketSize = cpu_to_le16(size);
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
static struct usb_ep * __init
|
||||
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 - choose an endpoint matching the descriptor
|
||||
* @gadget: The device to which the endpoint must belong.
|
||||
* @desc: Endpoint descriptor, with endpoint direction and transfer mode
|
||||
* initialized. For periodic transfers, the maximum packet
|
||||
* size must also be initialized. This is modified on success.
|
||||
*
|
||||
* By choosing an endpoint to use with the specified descriptor, this
|
||||
* routine simplifies writing gadget drivers that work with multiple
|
||||
* USB device controllers. The endpoint would be passed later to
|
||||
* usb_ep_enable(), along with some descriptor.
|
||||
*
|
||||
* That second descriptor won't always be the same as the first one.
|
||||
* For example, isochronous endpoints can be autoconfigured for high
|
||||
* bandwidth, and then used in several lower bandwidth altsettings.
|
||||
* Also, high and full speed descriptors will be different.
|
||||
*
|
||||
* Be sure to examine and test the results of autoconfiguration on your
|
||||
* hardware. This code may not make the best choices about how to use the
|
||||
* 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
|
||||
* 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.
|
||||
*
|
||||
* On failure, this returns a null endpoint descriptor.
|
||||
*/
|
||||
struct usb_ep * __init usb_ep_autoconfig (
|
||||
struct usb_gadget *gadget,
|
||||
struct usb_endpoint_descriptor *desc
|
||||
)
|
||||
{
|
||||
struct usb_ep *ep;
|
||||
u8 type;
|
||||
|
||||
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))
|
||||
return ep;
|
||||
ep = find_ep (gadget, "ep-f");
|
||||
if (ep && ep_matches (gadget, ep, desc))
|
||||
return 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))
|
||||
return 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))
|
||||
return ep;
|
||||
}
|
||||
|
||||
} else if (gadget_is_sh (gadget) && USB_ENDPOINT_XFER_INT == type) {
|
||||
/* single buffering is enough; maybe 8 byte fifo is too */
|
||||
ep = find_ep (gadget, "ep3in-bulk");
|
||||
if (ep && ep_matches (gadget, ep, desc))
|
||||
return ep;
|
||||
|
||||
} else if (gadget_is_mq11xx (gadget) && USB_ENDPOINT_XFER_INT == type) {
|
||||
ep = find_ep (gadget, "ep1-bulk");
|
||||
if (ep && ep_matches (gadget, ep, desc))
|
||||
return ep;
|
||||
}
|
||||
|
||||
/* 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))
|
||||
return ep;
|
||||
}
|
||||
|
||||
/* Fail */
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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
|
||||
* used by usb_ep_autoconfig().
|
||||
*/
|
||||
void __init usb_ep_autoconfig_reset (struct usb_gadget *gadget)
|
||||
{
|
||||
struct usb_ep *ep;
|
||||
|
||||
list_for_each_entry (ep, &gadget->ep_list, ep_list) {
|
||||
ep->driver_data = NULL;
|
||||
}
|
||||
#ifdef MANY_ENDPOINTS
|
||||
in_epnum = 0;
|
||||
#endif
|
||||
epnum = 0;
|
||||
}
|
||||
|
||||
Odkázat v novém úkolu
Zablokovat Uživatele