147 lines
3.3 KiB
C
147 lines
3.3 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2000,2001,2002,2003,2004,2005,2007,2008,2009,2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/serial.h>
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#include <grub/types.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/usb.h>
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static void
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real_config (struct grub_serial_port *port)
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{
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if (port->configured)
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return;
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port->configured = 1;
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}
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/* Fetch a key. */
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static int
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usbserial_hw_fetch (struct grub_serial_port *port)
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{
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char cc[3];
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grub_usb_err_t err;
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real_config (port);
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err = grub_usb_bulk_read (port->usbdev, port->in_endp->endp_addr, 2, cc);
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if (err != GRUB_USB_ERR_NAK)
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return -1;
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err = grub_usb_bulk_read (port->usbdev, port->in_endp->endp_addr, 3, cc);
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if (err != GRUB_USB_ERR_NONE)
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return -1;
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return cc[2];
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}
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/* Put a character. */
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static void
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usbserial_hw_put (struct grub_serial_port *port, const int c)
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{
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char cc = c;
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real_config (port);
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grub_usb_bulk_write (port->usbdev, port->out_endp->endp_addr, 1, &cc);
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}
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/* FIXME */
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static grub_err_t
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usbserial_hw_configure (struct grub_serial_port *port,
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struct grub_serial_config *config)
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{
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port->config = *config;
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port->configured = 0;
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return GRUB_ERR_NONE;
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}
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static struct grub_serial_driver grub_usbserial_driver =
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{
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.configure = usbserial_hw_configure,
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.fetch = usbserial_hw_fetch,
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.put = usbserial_hw_put
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};
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static int
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grub_usbserial_attach (grub_usb_device_t usbdev, int configno, int interfno)
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{
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static struct grub_serial_port *port;
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int j;
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struct grub_usb_desc_if *interf
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= usbdev->config[configno].interf[interfno].descif;
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port = grub_malloc (sizeof (*port));
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if (!port)
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{
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grub_print_error ();
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return 0;
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}
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port->name = grub_xasprintf ("usb%d", usbdev->addr);
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if (!port->name)
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{
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grub_free (port);
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grub_print_error ();
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return 0;
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}
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port->usbdev = usbdev;
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port->driver = &grub_usbserial_driver;
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for (j = 0; j < interf->endpointcnt; j++)
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{
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struct grub_usb_desc_endp *endp;
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endp = &usbdev->config[0].interf[interfno].descendp[j];
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if ((endp->endp_addr & 128) && (endp->attrib & 3) == 2)
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{
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/* Bulk IN endpoint. */
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port->in_endp = endp;
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}
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else if (!(endp->endp_addr & 128) && (endp->attrib & 3) == 2)
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{
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/* Bulk OUT endpoint. */
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port->out_endp = endp;
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}
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}
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if (!port->out_endp || !port->in_endp)
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{
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grub_free (port->name);
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grub_free (port);
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return 0;
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}
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grub_serial_config_defaults (port);
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grub_serial_register (port);
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return 1;
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}
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struct grub_usb_attach_desc attach_hook =
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{
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.class = 0xff,
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.hook = grub_usbserial_attach
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};
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GRUB_MOD_INIT(usbserial)
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{
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grub_usb_register_attach_hook_class (&attach_hook);
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}
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