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 f9c1978..294f0c1 100644 (file)
--- 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 56c2166..aec558a 100644 (file)
--- 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 504ccc4..4e1539f 100644 (file)
--- 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