317 lines
8.6 KiB
C
317 lines
8.6 KiB
C
/* Support for the HID Boot Protocol. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008, 2009 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/term.h>
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#include <grub/time.h>
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#include <grub/cpu/io.h>
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#include <grub/misc.h>
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#include <grub/term.h>
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#include <grub/usb.h>
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#include <grub/dl.h>
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#include <grub/time.h>
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static char keyboard_map[128] =
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{
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'\0', '\0', '\0', '\0', 'a', 'b', 'c', 'd',
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'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
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'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
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'u', 'v', 'w', 'x', 'y', 'z', '1', '2',
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'3', '4', '5', '6', '7', '8', '9', '0',
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'\n', GRUB_TERM_ESC, GRUB_TERM_BACKSPACE, GRUB_TERM_TAB, ' ', '-', '=', '[',
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']', '\\', '#', ';', '\'', '`', ',', '.',
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'/', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
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'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
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'\0', '\0', GRUB_TERM_HOME, GRUB_TERM_PPAGE, GRUB_TERM_DC, GRUB_TERM_END, GRUB_TERM_NPAGE, GRUB_TERM_RIGHT,
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GRUB_TERM_LEFT, GRUB_TERM_DOWN, GRUB_TERM_UP
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};
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static char keyboard_map_shift[128] =
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{
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'\0', '\0', '\0', '\0', 'A', 'B', 'C', 'D',
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'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
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'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
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'U', 'V', 'W', 'X', 'Y', 'Z', '!', '@',
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'#', '$', '%', '^', '&', '*', '(', ')',
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'\n', '\0', '\0', '\0', ' ', '_', '+', '{',
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'}', '|', '#', ':', '"', '`', '<', '>',
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'?'
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};
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/* Valid values for bRequest. See HID definition version 1.11 section 7.2. */
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#define USB_HID_GET_REPORT 0x01
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#define USB_HID_GET_IDLE 0x02
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#define USB_HID_GET_PROTOCOL 0x03
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#define USB_HID_SET_REPORT 0x09
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#define USB_HID_SET_IDLE 0x0A
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#define USB_HID_SET_PROTOCOL 0x0B
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#define USB_HID_BOOT_SUBCLASS 0x01
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#define USB_HID_KBD_PROTOCOL 0x01
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static int grub_usb_keyboard_checkkey (struct grub_term_input *term);
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static int grub_usb_keyboard_getkey (struct grub_term_input *term);
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static int grub_usb_keyboard_getkeystatus (struct grub_term_input *term);
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static struct grub_term_input grub_usb_keyboard_term =
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{
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.checkkey = grub_usb_keyboard_checkkey,
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.getkey = grub_usb_keyboard_getkey,
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.getkeystatus = grub_usb_keyboard_getkeystatus,
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.next = 0
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};
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struct grub_usb_keyboard_data
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{
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grub_usb_device_t usbdev;
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grub_uint8_t status;
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int key;
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struct grub_usb_desc_endp *endp;
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};
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static struct grub_term_input grub_usb_keyboards[16];
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static void
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grub_usb_keyboard_detach (grub_usb_device_t usbdev,
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int config __attribute__ ((unused)),
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int interface __attribute__ ((unused)))
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE (grub_usb_keyboards); i++)
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{
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struct grub_usb_keyboard_data *data = grub_usb_keyboards[i].data;
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if (!data)
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continue;
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if (data->usbdev != usbdev)
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continue;
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grub_term_unregister_input (&grub_usb_keyboards[i]);
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grub_free ((char *) grub_usb_keyboards[i].name);
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grub_usb_keyboards[i].name = NULL;
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grub_free (grub_usb_keyboards[i].data);
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grub_usb_keyboards[i].data = 0;
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}
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}
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static int
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grub_usb_keyboard_attach (grub_usb_device_t usbdev, int configno, int interfno)
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{
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unsigned curnum;
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struct grub_usb_keyboard_data *data;
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struct grub_usb_desc_endp *endp = NULL;
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int j;
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grub_dprintf ("usb_keyboard", "%x %x %x %d %d\n",
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usbdev->descdev.class, usbdev->descdev.subclass,
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usbdev->descdev.protocol, configno, interfno);
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for (curnum = 0; curnum < ARRAY_SIZE (grub_usb_keyboards); curnum++)
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if (!grub_usb_keyboards[curnum].data)
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break;
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if (curnum == ARRAY_SIZE (grub_usb_keyboards))
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return 0;
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if (usbdev->descdev.class != 0
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|| usbdev->descdev.subclass != 0 || usbdev->descdev.protocol != 0)
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return 0;
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if (usbdev->config[configno].interf[interfno].descif->subclass
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!= USB_HID_BOOT_SUBCLASS
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|| usbdev->config[configno].interf[interfno].descif->protocol
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!= USB_HID_KBD_PROTOCOL)
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return 0;
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for (j = 0; j < usbdev->config[configno].interf[interfno].descif->endpointcnt;
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j++)
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{
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endp = &usbdev->config[configno].interf[interfno].descendp[j];
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if ((endp->endp_addr & 128) && grub_usb_get_ep_type(endp)
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== GRUB_USB_EP_INTERRUPT)
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break;
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}
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if (j == usbdev->config[configno].interf[interfno].descif->endpointcnt)
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return 0;
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grub_dprintf ("usb_keyboard", "HID found!\n");
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data = grub_malloc (sizeof (*data));
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if (!data)
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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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data->usbdev = usbdev;
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data->endp = endp;
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/* Place the device in boot mode. */
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grub_usb_control_msg (usbdev, GRUB_USB_REQTYPE_CLASS_INTERFACE_OUT,
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USB_HID_SET_PROTOCOL, 0, 0, 0, 0);
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/* Reports every time an event occurs and not more often than that. */
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grub_usb_control_msg (usbdev, GRUB_USB_REQTYPE_CLASS_INTERFACE_OUT,
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USB_HID_SET_IDLE, 0<<8, 0, 0, 0);
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grub_memcpy (&grub_usb_keyboards[curnum], &grub_usb_keyboard_term,
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sizeof (grub_usb_keyboards[curnum]));
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grub_usb_keyboards[curnum].data = data;
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usbdev->config[configno].interf[interfno].detach_hook
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= grub_usb_keyboard_detach;
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grub_usb_keyboards[curnum].name = grub_xasprintf ("usb_keyboard%d", curnum);
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if (!grub_usb_keyboards[curnum].name)
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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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{
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grub_uint8_t report[8];
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grub_usb_err_t err;
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grub_memset (report, 0, sizeof (report));
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err = grub_usb_control_msg (usbdev, GRUB_USB_REQTYPE_CLASS_INTERFACE_IN,
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USB_HID_GET_REPORT, 0x0000, interfno,
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sizeof (report), (char *) report);
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if (err)
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{
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data->status = 0;
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data->key = -1;
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}
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else
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{
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data->status = report[0];
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data->key = report[2] ? : -1;
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}
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}
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grub_term_register_input_active ("usb_keyboard", &grub_usb_keyboards[curnum]);
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return 1;
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}
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static int
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grub_usb_keyboard_checkkey (struct grub_term_input *term)
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{
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grub_uint8_t data[8];
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grub_usb_err_t err;
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struct grub_usb_keyboard_data *termdata = term->data;
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grub_size_t actual;
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if (termdata->key != -1)
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return termdata->key;
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data[2] = 0;
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/* Poll interrupt pipe. */
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err = grub_usb_bulk_read_extended (termdata->usbdev,
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termdata->endp->endp_addr, sizeof (data),
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(char *) data, 10, &actual);
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if (err || actual < 1)
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return -1;
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termdata->status = data[0];
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if (actual < 3 || !data[2])
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return -1;
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grub_dprintf ("usb_keyboard",
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"report: 0x%02x 0x%02x 0x%02x 0x%02x"
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" 0x%02x 0x%02x 0x%02x 0x%02x\n",
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data[0], data[1], data[2], data[3],
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data[4], data[5], data[6], data[7]);
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/* Check if the Control or Shift key was pressed. */
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if (data[0] & 0x01 || data[0] & 0x10)
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termdata->key = keyboard_map[data[2]] - 'a' + 1;
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else if (data[0] & 0x02 || data[0] & 0x20)
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termdata->key = keyboard_map_shift[data[2]];
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else
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termdata->key = keyboard_map[data[2]];
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if (termdata->key == 0)
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grub_printf ("Unknown key 0x%x detected\n", data[2]);
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grub_errno = GRUB_ERR_NONE;
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return termdata->key;
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}
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static int
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grub_usb_keyboard_getkey (struct grub_term_input *term)
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{
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int ret;
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struct grub_usb_keyboard_data *termdata = term->data;
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while (termdata->key == -1)
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grub_usb_keyboard_checkkey (term);
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ret = termdata->key;
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termdata->key = -1;
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return ret;
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}
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static int
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grub_usb_keyboard_getkeystatus (struct grub_term_input *term)
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{
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struct grub_usb_keyboard_data *termdata = term->data;
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int mods = 0;
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/* Check Shift, Control, and Alt status. */
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if (termdata->status & 0x02 || termdata->status & 0x20)
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mods |= GRUB_TERM_STATUS_SHIFT;
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if (termdata->status & 0x01 || termdata->status & 0x10)
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mods |= GRUB_TERM_STATUS_CTRL;
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if (termdata->status & 0x04 || termdata->status & 0x40)
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mods |= GRUB_TERM_STATUS_ALT;
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return mods;
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}
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struct grub_usb_attach_desc attach_hook =
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{
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.class = GRUB_USB_CLASS_HID,
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.hook = grub_usb_keyboard_attach
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};
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GRUB_MOD_INIT(usb_keyboard)
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{
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grub_usb_register_attach_hook_class (&attach_hook);
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}
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GRUB_MOD_FINI(usb_keyboard)
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE (grub_usb_keyboards); i++)
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if (grub_usb_keyboards[i].data)
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{
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grub_term_unregister_input (&grub_usb_keyboards[i]);
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grub_free ((char *) grub_usb_keyboards[i].name);
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grub_usb_keyboards[i].name = NULL;
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grub_usb_keyboards[i].data = 0;
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}
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grub_usb_unregister_attach_hook_class (&attach_hook);
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}
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