140 lines
3.7 KiB
C
140 lines
3.7 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/usbserial.h>
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#include <grub/dl.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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void
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grub_usbserial_fini (struct grub_serial_port *port)
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{
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port->usbdev->config[port->configno].interf[port->interfno].detach_hook = 0;
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port->usbdev->config[port->configno].interf[port->interfno].attached = 0;
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}
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void
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grub_usbserial_detach (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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port = usbdev->config[configno].interf[interfno].detach_data;
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grub_serial_unregister (port);
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}
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static int usbnum = 0;
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int
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grub_usbserial_attach (grub_usb_device_t usbdev, int configno, int interfno,
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struct grub_serial_driver *driver, int in_endp,
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int out_endp)
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{
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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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grub_usb_err_t err = GRUB_USB_ERR_NONE;
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interf = usbdev->config[configno].interf[interfno].descif;
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port = grub_zalloc (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", usbnum++);
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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 = 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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&& (in_endp == GRUB_USB_SERIAL_ENDPOINT_LAST_MATCHING
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|| in_endp == endp->endp_addr))
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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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&& (out_endp == GRUB_USB_SERIAL_ENDPOINT_LAST_MATCHING
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|| out_endp == endp->endp_addr))
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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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/* Configure device */
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if (port->out_endp && port->in_endp)
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err = grub_usb_set_configuration (usbdev, configno + 1);
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if (!port->out_endp || !port->in_endp || err)
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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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port->configno = configno;
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port->interfno = interfno;
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grub_serial_config_defaults (port);
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grub_serial_register (port);
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port->usbdev->config[port->configno].interf[port->interfno].detach_hook
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= grub_usbserial_detach;
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port->usbdev->config[port->configno].interf[port->interfno].detach_data
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= port;
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return 1;
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}
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int
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grub_usbserial_fetch (struct grub_serial_port *port, grub_size_t header_size)
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{
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grub_usb_err_t err;
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grub_size_t actual;
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if (port->bufstart < port->bufend)
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return port->buf[port->bufstart++];
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err = grub_usb_bulk_read_extended (port->usbdev, port->in_endp->endp_addr,
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sizeof (port->buf), port->buf, 10,
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&actual);
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if (err != GRUB_USB_ERR_NONE)
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return -1;
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port->bufstart = header_size;
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port->bufend = actual;
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if (port->bufstart >= port->bufend)
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return -1;
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return port->buf[port->bufstart++];
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}
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