mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 02:08:38 +00:00
ec3fd68952
Replace the in-place ad-hoc implementation of serial_puts() within the drivers with default_serial_puts() call. This cuts down on the code duplication quite a bit. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Tom Rini <trini@ti.com>
133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
/*
|
|
* serial.c -- KS8695 serial driver
|
|
*
|
|
* (C) Copyright 2004, Greg Ungerer <greg.ungerer@opengear.com>
|
|
*
|
|
* This program 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 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/platform.h>
|
|
#include <serial.h>
|
|
#include <linux/compiler.h>
|
|
|
|
#ifndef CONFIG_SERIAL1
|
|
#error "Bad: you didn't configure serial ..."
|
|
#endif
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/*
|
|
* Define the UART hardware register access structure.
|
|
*/
|
|
struct ks8695uart {
|
|
unsigned int RX; /* 0x00 - Receive data (r) */
|
|
unsigned int TX; /* 0x04 - Transmit data (w) */
|
|
unsigned int FCR; /* 0x08 - Fifo Control (r/w) */
|
|
unsigned int LCR; /* 0x0c - Line Control (r/w) */
|
|
unsigned int MCR; /* 0x10 - Modem Control (r/w) */
|
|
unsigned int LSR; /* 0x14 - Line Status (r/w) */
|
|
unsigned int MSR; /* 0x18 - Modem Status (r/w) */
|
|
unsigned int BD; /* 0x1c - Baud Rate (r/w) */
|
|
unsigned int SR; /* 0x20 - Status (r/w) */
|
|
};
|
|
|
|
#define KS8695_UART_ADDR ((void *) (KS8695_IO_BASE + KS8695_UART_RX_BUFFER))
|
|
#define KS8695_UART_CLK 25000000
|
|
|
|
|
|
/*
|
|
* Under some circumstances we want to be "quiet" and not issue any
|
|
* serial output - though we want u-boot to otherwise work and behave
|
|
* the same. By default be noisy.
|
|
*/
|
|
int serial_console = 1;
|
|
|
|
|
|
static void ks8695_serial_setbrg(void)
|
|
{
|
|
volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
|
|
|
|
/* Set to global baud rate and 8 data bits, no parity, 1 stop bit*/
|
|
uartp->BD = KS8695_UART_CLK / gd->baudrate;
|
|
uartp->LCR = KS8695_UART_LINEC_WLEN8;
|
|
}
|
|
|
|
static int ks8695_serial_init(void)
|
|
{
|
|
serial_console = 1;
|
|
serial_setbrg();
|
|
return 0;
|
|
}
|
|
|
|
static void ks8695_serial_raw_putc(const char c)
|
|
{
|
|
volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
|
|
int i;
|
|
|
|
for (i = 0; (i < 0x100000); i++) {
|
|
if (uartp->LSR & KS8695_UART_LINES_TXFE)
|
|
break;
|
|
}
|
|
|
|
uartp->TX = c;
|
|
}
|
|
|
|
static void ks8695_serial_putc(const char c)
|
|
{
|
|
if (serial_console) {
|
|
ks8695_serial_raw_putc(c);
|
|
if (c == '\n')
|
|
ks8695_serial_raw_putc('\r');
|
|
}
|
|
}
|
|
|
|
static int ks8695_serial_tstc(void)
|
|
{
|
|
volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
|
|
if (serial_console)
|
|
return ((uartp->LSR & KS8695_UART_LINES_RXFE) ? 1 : 0);
|
|
return 0;
|
|
}
|
|
|
|
static int ks8695_serial_getc(void)
|
|
{
|
|
volatile struct ks8695uart *uartp = KS8695_UART_ADDR;
|
|
|
|
while ((uartp->LSR & KS8695_UART_LINES_RXFE) == 0)
|
|
;
|
|
return (uartp->RX);
|
|
}
|
|
|
|
static struct serial_device ks8695_serial_drv = {
|
|
.name = "ks8695_serial",
|
|
.start = ks8695_serial_init,
|
|
.stop = NULL,
|
|
.setbrg = ks8695_serial_setbrg,
|
|
.putc = ks8695_serial_putc,
|
|
.puts = default_serial_puts,
|
|
.getc = ks8695_serial_getc,
|
|
.tstc = ks8695_serial_tstc,
|
|
};
|
|
|
|
void ks8695_serial_initialize(void)
|
|
{
|
|
serial_register(&ks8695_serial_drv);
|
|
}
|
|
|
|
__weak struct serial_device *default_serial_console(void)
|
|
{
|
|
return &ks8695_serial_drv;
|
|
}
|