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USB event poll support

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This patch adds USB event poll support, which could be used in usbkbd
and other usb devices driver when the asynchronous interrupt
processing is supported.

Signed-off-by: Zhang Wei <wei.zhang@freescale.com
This commit is contained in:
Zhang Wei 2007-06-06 10:08:13 +02:00 committed by Markus Klotzbuecher
parent 9a1d00fa47
commit fdcfaa1b02
3 changed files with 9 additions and 1 deletions
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3
README
View File

@ -901,6 +901,9 @@ The following options need to be configured:
CONFIG_USB_CONFIG CONFIG_USB_CONFIG
for differential drivers: 0x00001000 for differential drivers: 0x00001000
for single ended drivers: 0x00005000 for single ended drivers: 0x00005000
CFG_USB_EVENT_POLL
May be defined to allow interrupt polling
instead of using asynchronous interrupts
- USB Device: - USB Device:
Define the below if you wish to use the USB console. Define the below if you wish to use the USB console.

6
common/usb_kbd.c
View File

@ -129,7 +129,11 @@ static int usb_kbd_testc(void)
static int usb_kbd_getc(void) static int usb_kbd_getc(void)
{ {
char c; char c;
while(usb_in_pointer==usb_out_pointer); while(usb_in_pointer==usb_out_pointer) {
#ifdef CFG_USB_EVENT_POLL
usb_event_poll();
#endif
}
if((usb_out_pointer+1)==USB_KBD_BUFFER_LEN) if((usb_out_pointer+1)==USB_KBD_BUFFER_LEN)
usb_out_pointer=0; usb_out_pointer=0;
else else

1
include/usb.h
View File

@ -180,6 +180,7 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len,struct devrequest *setup); int transfer_len,struct devrequest *setup);
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, int interval); int transfer_len, int interval);
void usb_event_poll(void);
/* Defines */ /* Defines */
#define USB_UHCI_VEND_ID 0x8086 #define USB_UHCI_VEND_ID 0x8086