| /* |
| * 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++]; |
| } |