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Diffstat (limited to '')
-rw-r--r-- | grub-core/bus/usb/serial/usbdebug_late.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/grub-core/bus/usb/serial/usbdebug_late.c b/grub-core/bus/usb/serial/usbdebug_late.c new file mode 100644 index 0000000..e88ba13 --- /dev/null +++ b/grub-core/bus/usb/serial/usbdebug_late.c @@ -0,0 +1,93 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2000,2001,2002,2003,2004,2005,2007,2008,2009,2010,2013 Free Software Foundation, Inc. + * + * GRUB 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 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/serial.h> +#include <grub/types.h> +#include <grub/dl.h> +#include <grub/misc.h> +#include <grub/mm.h> +#include <grub/usb.h> +#include <grub/usbserial.h> +#include <grub/i18n.h> + +GRUB_MOD_LICENSE ("GPLv3+"); + + +/* Fetch a key. */ +static int +usbdebug_late_hw_fetch (struct grub_serial_port *port) +{ + return grub_usbserial_fetch (port, 0); +} + +/* Put a character. */ +static void +usbdebug_late_hw_put (struct grub_serial_port *port, const int c) +{ + char cc = c; + + grub_usb_bulk_write (port->usbdev, port->out_endp, 1, &cc); +} + +static grub_err_t +usbdebug_late_hw_configure (struct grub_serial_port *port __attribute__ ((unused)), + struct grub_serial_config *config __attribute__ ((unused))) +{ + return GRUB_ERR_NONE; +} + +static struct grub_serial_driver grub_usbdebug_late_driver = + { + .configure = usbdebug_late_hw_configure, + .fetch = usbdebug_late_hw_fetch, + .put = usbdebug_late_hw_put, + .fini = grub_usbserial_fini + }; + +static int +grub_usbdebug_late_attach (grub_usb_device_t usbdev, int configno, int interfno) +{ + grub_usb_err_t err; + struct grub_usb_desc_debug debugdesc; + + err = grub_usb_get_descriptor (usbdev, GRUB_USB_DESCRIPTOR_DEBUG, configno, + sizeof (debugdesc), (char *) &debugdesc); + if (err) + return 0; + + return grub_usbserial_attach (usbdev, configno, interfno, + &grub_usbdebug_late_driver, + debugdesc.in_endp, debugdesc.out_endp); +} + +static struct grub_usb_attach_desc attach_hook = +{ + .class = 0xff, + .hook = grub_usbdebug_late_attach +}; + +GRUB_MOD_INIT(usbserial_usbdebug_late) +{ + grub_usb_register_attach_hook_class (&attach_hook); +} + +GRUB_MOD_FINI(usbserial_usbdebug_late) +{ + grub_serial_unregister_driver (&grub_usbdebug_late_driver); + grub_usb_unregister_attach_hook_class (&attach_hook); +} |