173 lines
4.2 KiB
C
173 lines
4.2 KiB
C
/* $NetBSD: console.c,v 1.2 2011/07/28 15:50:13 matt Exp $ */
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/*-
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* Copyright (c) 2011 CradlePoint Technology, Inc.
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* All rights reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY CRADLEPOINT TECHNOLOGY, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: console.c,v 1.2 2011/07/28 15:50:13 matt Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#include <dev/cons.h>
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#include <mips/ralink/ralink_reg.h>
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#include <mips/ralink/ralink_var.h>
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static inline uint32_t
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sysctl_read(const u_int offset)
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{
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return *RA_IOREG_VADDR(RA_SYSCTL_BASE, offset);
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}
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static inline void
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sysctl_write(const u_int offset, uint32_t val)
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{
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*RA_IOREG_VADDR(RA_SYSCTL_BASE, offset) = val;
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}
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static inline uint32_t
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uart_read(const u_int offset)
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{
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return *RA_IOREG_VADDR(RA_UART_LITE_BASE, offset);
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}
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static inline void
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uart_write(const u_int offset, const uint32_t val)
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{
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*RA_IOREG_VADDR(RA_UART_LITE_BASE, offset) = val;
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}
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#ifdef RA_CONSOLE_EARLY
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static void
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ra_console_putc(dev_t dev, int c)
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{
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u_int timo;
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timo = 150000;
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do {
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if ((uart_read(RA_UART_LSR) & UART_LSR_TDRQ) != 0)
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break;
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} while(--timo != 0);
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uart_write(RA_UART_TBR, c);
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if (c == '\n')
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ra_console_putc (dev, '\r');
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#if 1
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timo = 150000;
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do {
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if ((uart_read(RA_UART_LSR) & UART_LSR_TEMT) != 0)
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break;
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} while(--timo != 0);
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#endif
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}
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static int
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ra_console_getc(dev_t dev)
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{
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while ((uart_read(RA_UART_LSR) & UART_LSR_DR) == 0)
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;
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return (char)(uart_read(RA_UART_RBR) & 0xff);
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}
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static void
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ra_console_flush(dev_t dev)
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{
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while ((uart_read(RA_UART_LSR) & UART_LSR_TEMT) == 0)
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;
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}
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void
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ra_console_early(void)
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{
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uint32_t r;
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/* reset */
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r = sysctl_read(RA_SYSCTL_RST);
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r |= RST_UARTL;
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sysctl_write(RA_SYSCTL_RST, r);
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r ^= RST_UARTL;
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sysctl_write(RA_SYSCTL_RST, r);
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/* make sure we are in UART mode */
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r = sysctl_read(RA_SYSCTL_GPIOMODE);
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r &= ~GPIOMODE_UARTL;
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sysctl_write(RA_SYSCTL_GPIOMODE, r);
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uart_write(RA_UART_IER, 0); /* disable interrupts */
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uart_write(RA_UART_FCR, 0); /* disable fifos */
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/* set baud rate */
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uart_write(RA_UART_LCR,
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UART_LCR_WLS0 | UART_LCR_WLS1 | UART_LCR_DLAB);
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uart_write(RA_UART_DLL,
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(RA_UART_FREQ / RA_SERIAL_CLKDIV / RA_BAUDRATE)
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& 0xffff);
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uart_write(RA_UART_LCR,
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UART_LCR_WLS0 | UART_LCR_WLS1);
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static struct consdev lite_cn = {
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.cn_probe = NULL,
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.cn_init = NULL,
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.cn_getc = ra_console_getc,
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.cn_putc = ra_console_putc,
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.cn_pollc = nullcnpollc,
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.cn_bell = NULL,
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.cn_halt = NULL,
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.cn_flush = ra_console_flush,
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.cn_dev = makedev(0, 0),
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.cn_pri = CN_DEAD,
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};
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cn_tab = &lite_cn;
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}
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#endif /* RA_CONSOLE_EARLY */
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void
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consinit(void)
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{
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if (ra_check_memo_reg(SERIAL_CONSOLE)) {
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ralink_com_early(0);
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printf("Enabled early console\n");
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} else {
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/*
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* this should be OK, but our shell configuration doesn't seem
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* to be working, so create a silent console
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*/
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cn_tab = NULL;
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ralink_com_early(1);
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printf("Enabled silent console\n");
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}
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#if 0
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/* update ddb escape sequence to '~~' to avoid the undocking issue */
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cn_set_magic("\x7E\x7E");
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#endif
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}
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