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add some informations about this file

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15344 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Christian Gmeiner 2007-10-28 14:02:51 +00:00
parent b77893e4d5
commit fec406c7a2
2 changed files with 30 additions and 21 deletions
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24
firmware/drivers/usb/arcotg_dcd.c
View File

@ -467,25 +467,17 @@ static void resume_int(void)
static void reset_int(void)
{
struct timer t;
/* clear device address */
UDC_DEVICEADDR = 0 << 25;
/* update usb state */
dcd_controller.usb_state = USB_STATE_DEFAULT;
timer_set(&t, RESET_TIMER);
UDC_ENDPTSETUPSTAT = UDC_ENDPTSETUPSTAT;
UDC_ENDPTCOMPLETE = UDC_ENDPTCOMPLETE;
while (UDC_ENDPTPRIME) { /* prime and flush pending transfers */
if (timer_expired(&t)) {
logf("TIMEOUT->p&f");
}
}
/* prime and flush pending transfers */
while (UDC_ENDPTPRIME);
UDC_ENDPTFLUSH = ~0;
if ((UDC_PORTSC1 & PORTSCX_PORT_RESET) == 0) {
@ -493,19 +485,9 @@ static void reset_int(void)
}
/* clear USB Reset status bit */
UDC_USBSTS = USB_STS_RESET;
/* wait for port change */
while ((UDC_USBSTS & USB_STS_PORT_CHANGE) == 0) {
if (timer_expired(&t)) {
logf("TIMEOUT->portchange");
}
}
UDC_USBSTS = (1 << 2);
UDC_USBSTS |= USB_STS_RESET;
}
/*-------------------------------------------------------------------------*/
/* usb controller ops */

27
firmware/export/usb_ch9.h
View File

@ -21,6 +21,33 @@
*
****************************************************************************/
/*
* This file holds USB constants and structures that are needed for
* USB device APIs. These are used by the USB device model, which is
* defined in chapter 9 of the USB 2.0 specification and in the
* Wireless USB 1.0 (spread around).
*
* USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
* act either as a USB master/host or as a USB slave/device. That means
* the master and slave side APIs benefit from working well together.
*
* There's also "Wireless USB", using low power short range radios for
* peripheral interconnection but otherwise building on the USB framework.
*
* Note all descriptors are declared '__attribute__((packed))' so that:
*
* [a] they never get padded, either internally (USB spec writers
* probably handled that) or externally;
*
* [b] so that accessing bigger-than-a-bytes fields will never
* generate bus errors on any platform, even when the location of
* its descriptor inside a bundle isn't "naturally aligned", and
*
* [c] for consistency, removing all doubt even when it appears to
* someone that the two other points are non-issues for that
* particular descriptor type.
*/
#ifndef _CH9_H_
#define _CH9_H_