mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
486beae0a6
Use defined constant instead of variable for reg_shift Change u_int32_t to uint32_t Approved by: gonzo Suggested by: bde, wkoszek
143 lines
3.6 KiB
C
143 lines
3.6 KiB
C
/*-
|
|
* Copyright (c) 2012 Ganbold Tsagaankhuu <ganbold@gmail.com>
|
|
* 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 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.
|
|
*/
|
|
|
|
/* Simple UART console driver for Allwinner A10 */
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/cons.h>
|
|
#include <sys/consio.h>
|
|
#include <sys/kernel.h>
|
|
|
|
#ifndef A10_UART_BASE
|
|
#define A10_UART_BASE 0xe1c28000 /* UART0 */
|
|
#endif
|
|
|
|
#define REG_SHIFT 2
|
|
|
|
#define UART_DLL 0 /* Out: Divisor Latch Low */
|
|
#define UART_DLM 1 /* Out: Divisor Latch High */
|
|
#define UART_FCR 2 /* Out: FIFO Control Register */
|
|
#define UART_LCR 3 /* Out: Line Control Register */
|
|
#define UART_MCR 4 /* Out: Modem Control Register */
|
|
#define UART_LSR 5 /* In: Line Status Register */
|
|
#define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */
|
|
#define UART_LSR_DR 0x01 /* Receiver data ready */
|
|
#define UART_MSR 6 /* In: Modem Status Register */
|
|
#define UART_SCR 7 /* I/O: Scratch Register */
|
|
|
|
static uint32_t
|
|
uart_getreg(uint32_t *bas)
|
|
{
|
|
return *((volatile uint32_t *)(bas)) & 0xff;
|
|
}
|
|
|
|
static void
|
|
uart_setreg(uint32_t *bas, uint32_t val)
|
|
{
|
|
*((volatile uint32_t *)(bas)) = val;
|
|
}
|
|
|
|
static int
|
|
ub_getc(void)
|
|
{
|
|
while ((uart_getreg((uint32_t *)(A10_UART_BASE +
|
|
(UART_LSR << REG_SHIFT))) & UART_LSR_DR) == 0);
|
|
__asm __volatile("nop");
|
|
|
|
return (uart_getreg((uint32_t *)A10_UART_BASE) & 0xff);
|
|
}
|
|
|
|
static void
|
|
ub_putc(unsigned char c)
|
|
{
|
|
if (c == '\n')
|
|
ub_putc('\r');
|
|
|
|
while ((uart_getreg((uint32_t *)(A10_UART_BASE +
|
|
(UART_LSR << REG_SHIFT))) & UART_LSR_THRE) == 0)
|
|
__asm __volatile("nop");
|
|
|
|
uart_setreg((uint32_t *)A10_UART_BASE, c);
|
|
}
|
|
|
|
static cn_probe_t uart_cnprobe;
|
|
static cn_init_t uart_cninit;
|
|
static cn_term_t uart_cnterm;
|
|
static cn_getc_t uart_cngetc;
|
|
static cn_putc_t uart_cnputc;
|
|
static cn_grab_t uart_cngrab;
|
|
static cn_ungrab_t uart_cnungrab;
|
|
|
|
static void
|
|
uart_cngrab(struct consdev *cp)
|
|
{
|
|
}
|
|
|
|
static void
|
|
uart_cnungrab(struct consdev *cp)
|
|
{
|
|
}
|
|
|
|
|
|
static void
|
|
uart_cnprobe(struct consdev *cp)
|
|
{
|
|
sprintf(cp->cn_name, "uart");
|
|
cp->cn_pri = CN_NORMAL;
|
|
}
|
|
|
|
static void
|
|
uart_cninit(struct consdev *cp)
|
|
{
|
|
uart_setreg((uint32_t *)(A10_UART_BASE +
|
|
(UART_FCR << REG_SHIFT)), 0x06);
|
|
}
|
|
|
|
void
|
|
uart_cnputc(struct consdev *cp, int c)
|
|
{
|
|
ub_putc(c);
|
|
}
|
|
|
|
int
|
|
uart_cngetc(struct consdev * cp)
|
|
{
|
|
return ub_getc();
|
|
}
|
|
|
|
static void
|
|
uart_cnterm(struct consdev * cp)
|
|
{
|
|
}
|
|
|
|
CONSOLE_DRIVER(uart);
|
|
|