256 lines
6 KiB
C
256 lines
6 KiB
C
/* Support for the HID Boot Protocol. */
|
||
/*
|
||
* GRUB -- GRand Unified Bootloader
|
||
* Copyright (C) 2008, 2009 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/term.h>
|
||
#include <grub/machine/machine.h>
|
||
#include <grub/machine/console.h>
|
||
#include <grub/time.h>
|
||
#include <grub/cpu/io.h>
|
||
#include <grub/misc.h>
|
||
#include <grub/term.h>
|
||
#include <grub/usb.h>
|
||
#include <grub/dl.h>
|
||
#include <grub/time.h>
|
||
|
||
|
||
static char keyboard_map[128] =
|
||
{
|
||
'\0', '\0', '\0', '\0', 'a', 'b', 'c', 'd',
|
||
'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
|
||
'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
|
||
'u', 'v', 'w', 'x', 'y', 'z', '1', '2',
|
||
'3', '4', '5', '6', '7', '8', '9', '0',
|
||
'\n', GRUB_TERM_ESC, GRUB_TERM_BACKSPACE, GRUB_TERM_TAB, ' ', '-', '=', '[',
|
||
']', '\\', '#', ';', '\'', '`', ',', '.',
|
||
'/', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
|
||
'\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0',
|
||
'\0', '\0', GRUB_TERM_HOME, GRUB_TERM_PPAGE, GRUB_TERM_DC, GRUB_TERM_END, GRUB_TERM_NPAGE, GRUB_TERM_RIGHT,
|
||
GRUB_TERM_LEFT, GRUB_TERM_DOWN, GRUB_TERM_UP
|
||
};
|
||
|
||
static char keyboard_map_shift[128] =
|
||
{
|
||
'\0', '\0', '\0', '\0', 'A', 'B', 'C', 'D',
|
||
'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
|
||
'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
|
||
'U', 'V', 'W', 'X', 'Y', 'Z', '!', '@',
|
||
'#', '$', '%', '^', '&', '*', '(', ')',
|
||
'\n', '\0', '\0', '\0', ' ', '_', '+', '{',
|
||
'}', '|', '#', ':', '"', '`', '<', '>',
|
||
'?'
|
||
};
|
||
|
||
static grub_usb_device_t usbdev;
|
||
|
||
static void
|
||
grub_usb_hid (void)
|
||
{
|
||
struct grub_usb_desc_device *descdev;
|
||
|
||
auto int usb_iterate (grub_usb_device_t dev);
|
||
int usb_iterate (grub_usb_device_t dev)
|
||
{
|
||
descdev = &dev->descdev;
|
||
|
||
grub_dprintf ("usb_keyboard", "%x %x %x\n",
|
||
descdev->class, descdev->subclass, descdev->protocol);
|
||
|
||
#if 0
|
||
if (descdev->class != 0x09
|
||
|| descdev->subclass == 0x01
|
||
|| descdev->protocol != 0x02)
|
||
return 0;
|
||
#endif
|
||
|
||
if (descdev->class != 0 || descdev->subclass != 0 || descdev->protocol != 0)
|
||
return 0;
|
||
|
||
grub_printf ("HID found!\n");
|
||
|
||
usbdev = dev;
|
||
|
||
return 1;
|
||
}
|
||
grub_usb_iterate (usb_iterate);
|
||
|
||
/* Place the device in boot mode. */
|
||
grub_usb_control_msg (usbdev, 0x21, 0x0B, 0, 0, 0, 0);
|
||
|
||
/* Reports everytime an event occurs and not more often than that. */
|
||
grub_usb_control_msg (usbdev, 0x21, 0x0A, 0<<8, 0, 0, 0);
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_usb_keyboard_getreport (grub_usb_device_t dev, unsigned char *report)
|
||
{
|
||
return grub_usb_control_msg (dev, (1 << 7) | (1 << 5) | 1, 0x01, 0, 0,
|
||
8, (char *) report);
|
||
}
|
||
|
||
|
||
|
||
static int
|
||
grub_usb_keyboard_checkkey (void)
|
||
{
|
||
unsigned char data[8];
|
||
int key;
|
||
int i;
|
||
grub_err_t err;
|
||
|
||
data[2] = 0;
|
||
for (i = 0; i < 50; i++)
|
||
{
|
||
/* Get_Report. */
|
||
err = grub_usb_keyboard_getreport (usbdev, data);
|
||
|
||
if (! err && data[2])
|
||
break;
|
||
}
|
||
|
||
if (err || !data[2])
|
||
return -1;
|
||
|
||
grub_dprintf ("usb_keyboard",
|
||
"report: 0x%02x 0x%02x 0x%02x 0x%02x"
|
||
" 0x%02x 0x%02x 0x%02x 0x%02x\n",
|
||
data[0], data[1], data[2], data[3],
|
||
data[4], data[5], data[6], data[7]);
|
||
|
||
/* Check if the Control or Shift key was pressed. */
|
||
if (data[0] & 0x01 || data[0] & 0x10)
|
||
key = keyboard_map[data[2]] - 'a' + 1;
|
||
else if (data[0] & 0x02 || data[0] & 0x20)
|
||
key = keyboard_map_shift[data[2]];
|
||
else
|
||
key = keyboard_map[data[2]];
|
||
|
||
if (key == 0)
|
||
grub_printf ("Unknown key 0x%x detected\n", data[2]);
|
||
|
||
#if 0
|
||
/* Wait until the key is released. */
|
||
while (!err && data[2])
|
||
{
|
||
err = grub_usb_control_msg (usbdev, (1 << 7) | (1 << 5) | 1, 0x01, 0, 0,
|
||
sizeof (data), (char *) data);
|
||
grub_dprintf ("usb_keyboard",
|
||
"report2: 0x%02x 0x%02x 0x%02x 0x%02x"
|
||
" 0x%02x 0x%02x 0x%02x 0x%02x\n",
|
||
data[0], data[1], data[2], data[3],
|
||
data[4], data[5], data[6], data[7]);
|
||
}
|
||
#endif
|
||
|
||
grub_errno = GRUB_ERR_NONE;
|
||
|
||
return key;
|
||
}
|
||
|
||
typedef enum
|
||
{
|
||
GRUB_HIDBOOT_REPEAT_NONE,
|
||
GRUB_HIDBOOT_REPEAT_FIRST,
|
||
GRUB_HIDBOOT_REPEAT
|
||
} grub_usb_keyboard_repeat_t;
|
||
|
||
static int
|
||
grub_usb_keyboard_getkey (void)
|
||
{
|
||
int key;
|
||
grub_err_t err;
|
||
unsigned char data[8];
|
||
grub_uint64_t currtime;
|
||
int timeout;
|
||
static grub_usb_keyboard_repeat_t repeat = GRUB_HIDBOOT_REPEAT_NONE;
|
||
|
||
again:
|
||
|
||
do
|
||
{
|
||
key = grub_usb_keyboard_checkkey ();
|
||
} while (key == -1);
|
||
|
||
data[2] = !0; /* Or whatever. */
|
||
err = 0;
|
||
|
||
switch (repeat)
|
||
{
|
||
case GRUB_HIDBOOT_REPEAT_FIRST:
|
||
timeout = 500;
|
||
break;
|
||
case GRUB_HIDBOOT_REPEAT:
|
||
timeout = 50;
|
||
break;
|
||
default:
|
||
timeout = 100;
|
||
break;
|
||
}
|
||
|
||
/* Wait until the key is released. */
|
||
currtime = grub_get_time_ms ();
|
||
while (!err && data[2])
|
||
{
|
||
/* Implement a timeout. */
|
||
if (grub_get_time_ms () > currtime + timeout)
|
||
{
|
||
if (repeat == 0)
|
||
repeat = 1;
|
||
else
|
||
repeat = 2;
|
||
|
||
grub_errno = GRUB_ERR_NONE;
|
||
return key;
|
||
}
|
||
|
||
err = grub_usb_keyboard_getreport (usbdev, data);
|
||
}
|
||
|
||
if (repeat)
|
||
{
|
||
repeat = 0;
|
||
goto again;
|
||
}
|
||
|
||
repeat = 0;
|
||
|
||
grub_errno = GRUB_ERR_NONE;
|
||
|
||
return key;
|
||
}
|
||
|
||
static struct grub_term_input grub_usb_keyboard_term =
|
||
{
|
||
.name = "usb_keyboard",
|
||
.checkkey = grub_usb_keyboard_checkkey,
|
||
.getkey = grub_usb_keyboard_getkey,
|
||
.next = 0
|
||
};
|
||
|
||
GRUB_MOD_INIT(usb_keyboard)
|
||
{
|
||
(void) mod; /* To stop warning. */
|
||
|
||
grub_usb_hid ();
|
||
grub_term_register_input (&grub_usb_keyboard_term);
|
||
}
|
||
|
||
GRUB_MOD_FINI(usb_keyboard)
|
||
{
|
||
grub_term_unregister_input (&grub_usb_keyboard_term);
|
||
}
|