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/* $NetBSD: console.c,v 1.3 2016/10/05 15:54:58 ryo Exp $ */
/*-
* Copyright (c) 2011 CradlePoint Technology, Inc.
* All rights reserved.
*
*
* 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 CRADLEPOINT TECHNOLOGY, INC. 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: console.c,v 1.3 2016/10/05 15:54:58 ryo Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <dev/cons.h>
#include <mips/ralink/ralink_reg.h>
#include <mips/ralink/ralink_var.h>
#ifndef RALINK_CONADDR
#define RALINK_CONADDR RA_UART_LITE_BASE /* default console is UART_LITE */
#endif
static inline uint32_t
sysctl_read(const u_int offset)
{
return *RA_IOREG_VADDR(RA_SYSCTL_BASE, offset);
}
static inline void
sysctl_write(const u_int offset, uint32_t val)
{
*RA_IOREG_VADDR(RA_SYSCTL_BASE, offset) = val;
}
static inline uint32_t
uart_read(const u_int offset)
{
return *RA_IOREG_VADDR(RALINK_CONADDR, offset);
}
static inline void
uart_write(const u_int offset, const uint32_t val)
{
*RA_IOREG_VADDR(RALINK_CONADDR, offset) = val;
}
#ifdef RA_CONSOLE_EARLY
static void
ra_console_putc(dev_t dev, int c)
{
u_int timo;
timo = 150000;
do {
if ((uart_read(RA_UART_LSR) & UART_LSR_TDRQ) != 0)
break;
} while(--timo != 0);
uart_write(RA_UART_TBR, c);
if (c == '\n')
ra_console_putc (dev, '\r');
#if 1
timo = 150000;
do {
if ((uart_read(RA_UART_LSR) & UART_LSR_TEMT) != 0)
break;
} while(--timo != 0);
#endif
}
static int
ra_console_getc(dev_t dev)
{
while ((uart_read(RA_UART_LSR) & UART_LSR_DR) == 0)
;
return (char)(uart_read(RA_UART_RBR) & 0xff);
}
static void
ra_console_flush(dev_t dev)
{
while ((uart_read(RA_UART_LSR) & UART_LSR_TEMT) == 0)
;
}
void
ra_console_early(void)
{
uint32_t r;
/* reset */
r = sysctl_read(RA_SYSCTL_RST);
r |= RST_UARTL;
sysctl_write(RA_SYSCTL_RST, r);
r ^= RST_UARTL;
sysctl_write(RA_SYSCTL_RST, r);
/* make sure we are in UART mode */
r = sysctl_read(RA_SYSCTL_GPIOMODE);
r &= ~GPIOMODE_UARTL;
sysctl_write(RA_SYSCTL_GPIOMODE, r);
uart_write(RA_UART_IER, 0); /* disable interrupts */
uart_write(RA_UART_FCR, 0); /* disable fifos */
/* set baud rate */
uart_write(RA_UART_LCR,
UART_LCR_WLS0 | UART_LCR_WLS1 | UART_LCR_DLAB);
uart_write(RA_UART_DLL,
(RA_UART_FREQ / RA_SERIAL_CLKDIV / RA_BAUDRATE)
& 0xffff);
uart_write(RA_UART_LCR,
UART_LCR_WLS0 | UART_LCR_WLS1);
static struct consdev lite_cn = {
.cn_probe = NULL,
.cn_init = NULL,
.cn_getc = ra_console_getc,
.cn_putc = ra_console_putc,
.cn_pollc = nullcnpollc,
.cn_bell = NULL,
.cn_halt = NULL,
.cn_flush = ra_console_flush,
.cn_dev = makedev(0, 0),
.cn_pri = CN_DEAD,
};
cn_tab = &lite_cn;
}
#endif /* RA_CONSOLE_EARLY */
void
consinit(void)
{
if (ra_check_memo_reg(SERIAL_CONSOLE)) {
ralink_com_early(0);
printf("Enabled early console\n");
} else {
/*
* this should be OK, but our shell configuration doesn't seem
* to be working, so create a silent console
*/
cn_tab = NULL;
ralink_com_early(1);
printf("Enabled silent console\n");
}
#if 0
/* update ddb escape sequence to '~~' to avoid the undocking issue */
cn_set_magic("\x7E\x7E");
#endif
}
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