USB event poll support

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

USB event poll support
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
Zhang Wei · Markus Klotzbuecher
1 parent 9a1d00fa47
Showing 3 changed files with 9 additions and 1 deletions Side-by-side Diff
README
common/usb_kbd.c
include/usb.h
@@ -901,6 +901,9 @@
 			CONFIG_USB_CONFIG
 				for differential drivers: 0x00001000
 				for single ended drivers: 0x00005000
+			CFG_USB_EVENT_POLL
+				May be defined to allow interrupt polling
+				instead of using asynchronous interrupts
  
 - USB Device:
 		Define the below if you wish to use the USB console.
@@ -129,7 +129,11 @@
 static int usb_kbd_getc(void)
 {
 	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)
 		usb_out_pointer=0;
 	else
@@ -180,6 +180,7 @@
 			int transfer_len,struct devrequest *setup);
 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 			int transfer_len, int interval);
+void usb_event_poll(void);
  
 /* Defines */
 #define USB_UHCI_VEND_ID 0x8086
...	...	@@ -901,6 +901,9 @@
901	901	CONFIG_USB_CONFIG
902	902	for differential drivers: 0x00001000
903	903	for single ended drivers: 0x00005000
	904	+ CFG_USB_EVENT_POLL
	905	+ May be defined to allow interrupt polling
	906	+ instead of using asynchronous interrupts
904	907
905	908	- USB Device:
906	909	Define the below if you wish to use the USB console.
...	...	@@ -129,7 +129,11 @@
129	129	static int usb_kbd_getc(void)
130	130	{
131	131	char c;
132		- while(usb_in_pointer==usb_out_pointer);
	132	+ while(usb_in_pointer==usb_out_pointer) {
	133	+#ifdef CFG_USB_EVENT_POLL
	134	+ usb_event_poll();
	135	+#endif
	136	+ }
133	137	if((usb_out_pointer+1)==USB_KBD_BUFFER_LEN)
134	138	usb_out_pointer=0;
135	139	else
...	...	@@ -180,6 +180,7 @@
180	180	int transfer_len,struct devrequest *setup);
181	181	int submit_int_msg(struct usb_device dev, unsigned long pipe, void buffer,
182	182	int transfer_len, int interval);
	183	+void usb_event_poll(void);
183	184
184	185	/* Defines */
185	186	#define USB_UHCI_VEND_ID 0x8086