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/*-
* Copyright (c) 1998 Michael Smith (msmith@freebsd.org)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Portions copyright (c) 2010, Intel Corporation
*/
/*
* sys/boot/i386/libi386/comconsole.c
*/
#include <types.h>
#include <stdbool.h>
#include <misc.h>
#include <mutex.h>
#include <io.h>
#include <pci_cfgreg.h>
#include <com.h>
#define COMC_TXWAIT 0x40000 /* transmit timeout */
#define COMC_BPS(x) (115200 / (x)) /* speed to DLAB divisor */
#define COMC_DIV2BPS(x) (115200 / (x)) /* DLAB divisor to speed */
#define OUTB(add, val) outb(g_com_port.comc_port + (add), (val))
#define INB(add) inb(g_com_port.comc_port + (add))
serial_port_t g_com_port = {115200, 0, 0x3, COM1_ADDR}; /* com1,115200,8n1 */
extern bool g_psbdf_enabled;
extern bool g_pbbdf_enabled;
extern struct mutex pcicfg_mtx;
static void comc_putchar(int c)
{
int wait;
for ( wait = COMC_TXWAIT; wait > 0; wait-- )
if ( INB(com_lsr) & LSR_TXRDY ) {
OUTB(com_data, (u_char)c);
break;
}
}
static void comc_setup(int speed)
{
OUTB(com_cfcr, CFCR_DLAB | g_com_port.comc_fmt);
OUTB(com_dlbl, COMC_BPS(speed) & 0xff);
OUTB(com_dlbh, COMC_BPS(speed) >> 8);
OUTB(com_cfcr, g_com_port.comc_fmt);
OUTB(com_mcr, MCR_RTS | MCR_DTR);
for ( int wait = COMC_TXWAIT; wait > 0; wait-- ) {
INB(com_data);
if ( !(INB(com_lsr) & LSR_RXRDY) )
break;
}
}
static void comc_pci_setup(void)
{
if ( g_psbdf_enabled ) {
if ( g_pbbdf_enabled ) {
pcireg_cfgwrite(g_com_port.comc_pbbdf.bus,
g_com_port.comc_pbbdf.slot,
g_com_port.comc_pbbdf.func,
PCIR_IOBASEL_1,
(g_com_port.comc_port & 0xF000)
| ((g_com_port.comc_port & 0xF000) >> 8),
2);
}
pcireg_cfgwrite(g_com_port.comc_psbdf.bus,
g_com_port.comc_psbdf.slot,
g_com_port.comc_psbdf.func,
PCIR_BARS,
g_com_port.comc_port | 0x1,
4);
pcireg_cfgwrite(g_com_port.comc_psbdf.bus,
g_com_port.comc_psbdf.slot,
g_com_port.comc_psbdf.func,
PCIR_COMMAND,
0x1,
2);
mtx_init(&pcicfg_mtx);
}
}
void comc_init(void)
{
comc_pci_setup();
comc_setup(g_com_port.comc_curspeed);
}
void comc_puts(const char *s, unsigned int cnt)
{
while ( *s && cnt-- ) {
if ( *s == '\n' )
comc_putchar('\r');
comc_putchar(*s++);
}
}
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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