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/* console.c -- Open Firmware console for GRUB. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2004,2005,2007,2008,2009 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/types.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/time.h>
#include <grub/terminfo.h>
#include <grub/dl.h>
#include <grub/speaker.h>
GRUB_MOD_LICENSE ("GPLv3+");
extern struct grub_terminfo_output_state grub_spkmodem_terminfo_output;
static void
make_tone (grub_uint16_t freq_count, unsigned int duration)
{
/* Program timer 2. */
grub_outb (GRUB_PIT_CTRL_SELECT_2
| GRUB_PIT_CTRL_READLOAD_WORD
| GRUB_PIT_CTRL_SQUAREWAVE_GEN
| GRUB_PIT_CTRL_COUNT_BINARY, GRUB_PIT_CTRL);
grub_outb (freq_count & 0xff, GRUB_PIT_COUNTER_2); /* LSB */
grub_outb ((freq_count >> 8) & 0xff, GRUB_PIT_COUNTER_2); /* MSB */
/* Start speaker. */
grub_outb (grub_inb (GRUB_PIT_SPEAKER_PORT)
| GRUB_PIT_SPK_TMR2 | GRUB_PIT_SPK_DATA,
GRUB_PIT_SPEAKER_PORT);
for (; duration; duration--)
{
unsigned short counter, previous_counter = 0xffff;
while (1)
{
counter = grub_inb (GRUB_PIT_COUNTER_2);
counter |= ((grub_uint16_t) grub_inb (GRUB_PIT_COUNTER_2)) << 8;
if (counter > previous_counter)
{
previous_counter = counter;
break;
}
previous_counter = counter;
}
}
}
static int inited;
static void
put (struct grub_term_output *term __attribute__ ((unused)), const int c)
{
int i;
make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 200, 4);
for (i = 7; i >= 0; i--)
{
if ((c >> i) & 1)
make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 2000, 20);
else
make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 4000, 40);
make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 1000, 10);
}
make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 200, 0);
}
static grub_err_t
grub_spkmodem_init_output (struct grub_term_output *term)
{
/* Some models shutdown sound when not in use and it takes for it
around 30 ms to come back on which loses 3 bits. So generate a base
200 Hz continously. */
make_tone (GRUB_SPEAKER_PIT_FREQUENCY / 200, 0);
grub_terminfo_output_init (term);
return 0;
}
static grub_err_t
grub_spkmodem_fini_output (struct grub_term_output *term __attribute__ ((unused)))
{
grub_speaker_beep_off ();
inited = 0;
return 0;
}
struct grub_terminfo_output_state grub_spkmodem_terminfo_output =
{
.put = put,
.size = { 80, 24 }
};
static struct grub_term_output grub_spkmodem_term_output =
{
.name = "spkmodem",
.init = grub_spkmodem_init_output,
.fini = grub_spkmodem_fini_output,
.putchar = grub_terminfo_putchar,
.getxy = grub_terminfo_getxy,
.getwh = grub_terminfo_getwh,
.gotoxy = grub_terminfo_gotoxy,
.cls = grub_terminfo_cls,
.setcolorstate = grub_terminfo_setcolorstate,
.setcursor = grub_terminfo_setcursor,
.flags = GRUB_TERM_CODE_TYPE_ASCII,
.data = &grub_spkmodem_terminfo_output,
.progress_update_divisor = GRUB_PROGRESS_NO_UPDATE
};
GRUB_MOD_INIT (spkmodem)
{
grub_term_register_output ("spkmodem", &grub_spkmodem_term_output);
}
GRUB_MOD_FINI (spkmodem)
{
grub_term_unregister_output (&grub_spkmodem_term_output);
}
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