From: Zhang Wei <wei.zhang@freescale.com>
Date: Wed, 6 Jun 2007 08:08:13 +0000 (+0200)
Subject: USB event poll support
X-Git-Tag: v1.3.0-rc1~19^2~20^2~12^2~10
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=fdcfaa1b02268b2899e374b35adf936c911a47eb;p=u-boot

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
---

diff --git a/README b/README
index f9c1978c3b..294f0c1dce 100644
--- a/README
+++ b/README
@@ -901,6 +901,9 @@ The following options need to be configured:
 			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.
diff --git a/common/usb_kbd.c b/common/usb_kbd.c
index 56c21660fa..aec558ad20 100644
--- a/common/usb_kbd.c
+++ b/common/usb_kbd.c
@@ -129,7 +129,11 @@ static int usb_kbd_testc(void)
 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
diff --git a/include/usb.h b/include/usb.h
index 504ccc40fc..4e1539fa88 100644
--- a/include/usb.h
+++ b/include/usb.h
@@ -180,6 +180,7 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 			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