[usb] Add generic USB human interface device (HID) framework

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/usb/usbhid.c

@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ * You can also choose to distribute this program under the terms of
+ * the Unmodified Binary Distribution Licence (as given in the file
+ * COPYING.UBDL), provided that you have satisfied its requirements.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <string.h>
+#include <errno.h>
+#include <ipxe/usb.h>
+#include <ipxe/usbhid.h>
+
+/** @file
+ *
+ * USB human interface devices (HID)
+ *
+ */
+
+/**
+ * Open USB human interface device
+ *
+ * @v hid		USB human interface device
+ * @ret rc		Return status code
+ */
+int usbhid_open ( struct usb_hid *hid ) {
+	int rc;
+
+	/* Open interrupt IN endpoint */
+	if ( ( rc = usb_endpoint_open ( &hid->in ) ) != 0 ) {
+		DBGC ( hid, "HID %s could not open interrupt IN: %s\n",
+		       hid->func->name, strerror ( rc ) );
+		goto err_open_in;
+	}
+
+	/* Refill interrupt IN endpoint */
+	if ( ( rc = usb_refill ( &hid->in ) ) != 0 ) {
+		DBGC ( hid, "HID %s could not refill interrupt IN: %s\n",
+		       hid->func->name, strerror ( rc ) );
+		goto err_refill_in;
+	}
+
+	/* Open interrupt OUT endpoint, if applicable */
+	if ( hid->out.usb &&
+	     ( ( rc = usb_endpoint_open ( &hid->out ) ) != 0 ) ) {
+		DBGC ( hid, "HID %s could not open interrupt OUT: %s\n",
+		       hid->func->name, strerror ( rc ) );
+		goto err_open_out;
+	}
+
+	return 0;
+
+	usb_endpoint_close ( &hid->out );
+ err_open_out:
+ err_refill_in:
+	usb_endpoint_close ( &hid->in );
+ err_open_in:
+	return rc;
+}
+
+/**
+ * Close USB human interface device
+ *
+ * @v hid		USB human interface device
+ */
+void usbhid_close ( struct usb_hid *hid ) {
+
+	/* Close interrupt OUT endpoint, if applicable */
+	if ( hid->out.usb )
+		usb_endpoint_close ( &hid->out );
+
+	/* Close interrupt IN endpoint */
+	usb_endpoint_close ( &hid->in );
+}
+
+/**
+ * Refill USB human interface device endpoints
+ *
+ * @v hid		USB human interface device
+ * @ret rc		Return status code
+ */
+int usbhid_refill ( struct usb_hid *hid ) {
+	int rc;
+
+	/* Refill interrupt IN endpoint */
+	if ( ( rc = usb_refill ( &hid->in ) ) != 0 )
+		return rc;
+
+	/* Refill interrupt OUT endpoint, if applicable */
+	if ( hid->out.usb && ( ( rc = usb_refill ( &hid->out ) ) != 0 ) )
+		return rc;
+
+	return 0;
+}
+
+/**
+ * Describe USB human interface device
+ *
+ * @v hid		USB human interface device
+ * @v config		Configuration descriptor
+ * @ret rc		Return status code
+ */
+int usbhid_describe ( struct usb_hid *hid,
+		      struct usb_configuration_descriptor *config ) {
+	struct usb_interface_descriptor *desc;
+	int rc;
+
+	/* Locate interface descriptor */
+	desc = usb_interface_descriptor ( config, hid->func->interface[0], 0 );
+	if ( ! desc ) {
+		DBGC ( hid, "HID %s has no interface descriptor\n",
+		       hid->func->name );
+		return -EINVAL;
+	}
+
+	/* Describe interrupt IN endpoint */
+	if ( ( rc = usb_endpoint_described ( &hid->in, config, desc,
+					     USB_INTERRUPT_IN, 0 ) ) != 0 ) {
+		DBGC ( hid, "HID %s could not describe interrupt IN: %s\n",
+		       hid->func->name, strerror ( rc ) );
+		return rc;
+	}
+
+	/* Describe interrupt OUT endpoint, if applicable */
+	if ( hid->out.usb &&
+	     ( ( rc = usb_endpoint_described ( &hid->out, config, desc,
+					       USB_INTERRUPT_OUT, 0 ) ) != 0 )){
+		DBGC ( hid, "HID %s could not describe interrupt OUT: %s\n",
+		       hid->func->name, strerror ( rc ) );
+		return rc;
+	}
+
+	return 0;
+}

src/include/ipxe/errfile.h

@@ -81,6 +81,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 #define ERRFILE_xhci		     ( ERRFILE_DRIVER | 0x00090000 )
 #define ERRFILE_ehci		     ( ERRFILE_DRIVER | 0x000a0000 )
 #define ERRFILE_uhci		     ( ERRFILE_DRIVER | 0x000b0000 )
+#define ERRFILE_usbhid		     ( ERRFILE_DRIVER | 0x000c0000 )
 
 #define ERRFILE_nvs		     ( ERRFILE_DRIVER | 0x00100000 )
 #define ERRFILE_spi		     ( ERRFILE_DRIVER | 0x00110000 )

src/include/ipxe/usbhid.h

@@ -0,0 +1,106 @@
+#ifndef _IPXE_USBHID_H
+#define _IPXE_USBHID_H
+
+/** @file
+ *
+ * USB human interface devices (HID)
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+#include <ipxe/usb.h>
+
+/** Class code for human interface devices */
+#define USB_CLASS_HID 3
+
+/** Subclass code for boot devices */
+#define USB_SUBCLASS_HID_BOOT 1
+
+/** Set protocol */
+#define USBHID_SET_PROTOCOL						\
+	( USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE |		\
+	  USB_REQUEST_TYPE ( 0x0b ) )
+
+/** Boot protocol */
+#define USBHID_PROTOCOL_BOOT 0
+
+/** Report protocol */
+#define USBHID_PROTOCOL_REPORT 1
+
+/** Set idle time */
+#define USBHID_SET_IDLE							\
+	( USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE |		\
+	  USB_REQUEST_TYPE ( 0x0a ) )
+
+/** A USB human interface device */
+struct usb_hid {
+	/** USB function */
+	struct usb_function *func;
+	/** Interrupt IN endpoint */
+	struct usb_endpoint in;
+	/** Interrupt OUT endpoint (optional) */
+	struct usb_endpoint out;
+};
+
+/**
+ * Initialise USB human interface device
+ *
+ * @v hid		USB human interface device
+ * @v func		USB function
+ * @v in		Interrupt IN endpoint operations
+ * @v out		Interrupt OUT endpoint operations (or NULL)
+ */
+static inline __attribute__ (( always_inline )) void
+usbhid_init ( struct usb_hid *hid, struct usb_function *func,
+	      struct usb_endpoint_driver_operations *in,
+	      struct usb_endpoint_driver_operations *out ) {
+	struct usb_device *usb = func->usb;
+
+	hid->func = func;
+	usb_endpoint_init ( &hid->in, usb, in );
+	if ( out )
+		usb_endpoint_init ( &hid->out, usb, out );
+}
+
+/**
+ * Set protocol
+ *
+ * @v usb		USB device
+ * @v interface		Interface number
+ * @v protocol		HID protocol
+ * @ret rc		Return status code
+ */
+static inline __attribute__ (( always_inline )) int
+usbhid_set_protocol ( struct usb_device *usb, unsigned int interface,
+		      unsigned int protocol ) {
+
+	return usb_control ( usb, USBHID_SET_PROTOCOL, protocol, interface,
+			     NULL, 0 );
+}
+
+/**
+ * Set idle time
+ *
+ * @v usb		USB device
+ * @v interface		Interface number
+ * @v report		Report ID
+ * @v duration		Duration (in 4ms units)
+ * @ret rc		Return status code
+ */
+static inline __attribute__ (( always_inline )) int
+usbhid_set_idle ( struct usb_device *usb, unsigned int interface,
+		  unsigned int report, unsigned int duration ) {
+
+	return usb_control ( usb, USBHID_SET_IDLE,
+			     ( ( duration << 8 ) | report ),
+			     interface, NULL, 0 );
+}
+
+extern int usbhid_open ( struct usb_hid *hid );
+extern void usbhid_close ( struct usb_hid *hid );
+extern int usbhid_refill ( struct usb_hid *hid );
+extern int usbhid_describe ( struct usb_hid *hid,
+			     struct usb_configuration_descriptor *config );
+
+#endif /* _IPXE_USBHID_H */