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