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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000,2001,2002,2003,2004,2005,2007,2008,2009,2010 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/usbserial.h>
#include <grub/dl.h>
GRUB_MOD_LICENSE ("GPLv3+");
void
grub_usbserial_fini (struct grub_serial_port *port)
{
port->usbdev->config[port->configno].interf[port->interfno].detach_hook = 0;
port->usbdev->config[port->configno].interf[port->interfno].attached = 0;
}
void
grub_usbserial_detach (grub_usb_device_t usbdev, int configno, int interfno)
{
static struct grub_serial_port *port;
port = usbdev->config[configno].interf[interfno].detach_data;
grub_serial_unregister (port);
}
static int usbnum = 0;
int
grub_usbserial_attach (grub_usb_device_t usbdev, int configno, int interfno,
struct grub_serial_driver *driver, int in_endp,
int out_endp)
{
struct grub_serial_port *port;
int j;
struct grub_usb_desc_if *interf;
grub_usb_err_t err = GRUB_USB_ERR_NONE;
interf = usbdev->config[configno].interf[interfno].descif;
port = grub_zalloc (sizeof (*port));
if (!port)
{
grub_print_error ();
return 0;
}
port->name = grub_xasprintf ("usb%d", usbnum++);
if (!port->name)
{
grub_free (port);
grub_print_error ();
return 0;
}
port->usbdev = usbdev;
port->driver = driver;
for (j = 0; j < interf->endpointcnt; j++)
{
struct grub_usb_desc_endp *endp;
endp = &usbdev->config[0].interf[interfno].descendp[j];
if ((endp->endp_addr & 128) && (endp->attrib & 3) == 2
&& (in_endp == GRUB_USB_SERIAL_ENDPOINT_LAST_MATCHING
|| in_endp == endp->endp_addr))
{
/* Bulk IN endpoint. */
port->in_endp = endp;
}
else if (!(endp->endp_addr & 128) && (endp->attrib & 3) == 2
&& (out_endp == GRUB_USB_SERIAL_ENDPOINT_LAST_MATCHING
|| out_endp == endp->endp_addr))
{
/* Bulk OUT endpoint. */
port->out_endp = endp;
}
}
/* Configure device */
if (port->out_endp && port->in_endp)
err = grub_usb_set_configuration (usbdev, configno + 1);
if (!port->out_endp || !port->in_endp || err)
{
grub_free (port->name);
grub_free (port);
return 0;
}
port->configno = configno;
port->interfno = interfno;
grub_serial_config_defaults (port);
grub_serial_register (port);
port->usbdev->config[port->configno].interf[port->interfno].detach_hook
= grub_usbserial_detach;
port->usbdev->config[port->configno].interf[port->interfno].detach_data
= port;
return 1;
}
int
grub_usbserial_fetch (struct grub_serial_port *port, grub_size_t header_size)
{
grub_usb_err_t err;
grub_size_t actual;
if (port->bufstart < port->bufend)
return port->buf[port->bufstart++];
err = grub_usb_bulk_read_extended (port->usbdev, port->in_endp,
sizeof (port->buf), port->buf, 10,
&actual);
if (err != GRUB_USB_ERR_NONE)
return -1;
port->bufstart = header_size;
port->bufend = actual;
if (port->bufstart >= port->bufend)
return -1;
return port->buf[port->bufstart++];
}
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