serial_sa1100.c
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/*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Alex Zuepke <azu@sysgo.de>
*
* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <SA-1100.h>
#include <serial.h>
#include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR;
static void sa1100_serial_setbrg(void)
{
unsigned int reg = 0;
if (gd->baudrate == 1200)
reg = 191;
else if (gd->baudrate == 9600)
reg = 23;
else if (gd->baudrate == 19200)
reg = 11;
else if (gd->baudrate == 38400)
reg = 5;
else if (gd->baudrate == 57600)
reg = 3;
else if (gd->baudrate == 115200)
reg = 1;
else
hang ();
#ifdef CONFIG_SERIAL1
/* SA1110 uart function */
Ser1SDCR0 |= SDCR0_SUS;
/* Wait until port is ready ... */
while(Ser1UTSR1 & UTSR1_TBY) {}
/* init serial serial 1 */
Ser1UTCR3 = 0x00;
Ser1UTSR0 = 0xff;
Ser1UTCR0 = ( UTCR0_1StpBit | UTCR0_8BitData );
Ser1UTCR1 = 0;
Ser1UTCR2 = (u32)reg;
Ser1UTCR3 = ( UTCR3_RXE | UTCR3_TXE );
#elif defined(CONFIG_SERIAL3)
/* Wait until port is ready ... */
while (Ser3UTSR1 & UTSR1_TBY) {
}
/* init serial serial 3 */
Ser3UTCR3 = 0x00;
Ser3UTSR0 = 0xff;
Ser3UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData);
Ser3UTCR1 = 0;
Ser3UTCR2 = (u32) reg;
Ser3UTCR3 = (UTCR3_RXE | UTCR3_TXE);
#else
#error "Bad: you didn't configured serial ..."
#endif
}
/*
* Initialise the serial port with the given baudrate. The settings
* are always 8 data bits, no parity, 1 stop bit, no start bits.
*
*/
static int sa1100_serial_init(void)
{
serial_setbrg ();
return (0);
}
/*
* Output a single byte to the serial port.
*/
static void sa1100_serial_putc(const char c)
{
#ifdef CONFIG_SERIAL1
/* wait for room in the tx FIFO on SERIAL1 */
while ((Ser1UTSR0 & UTSR0_TFS) == 0);
Ser1UTDR = c;
#elif defined(CONFIG_SERIAL3)
/* wait for room in the tx FIFO on SERIAL3 */
while ((Ser3UTSR0 & UTSR0_TFS) == 0);
Ser3UTDR = c;
#endif
/* If \n, also do \r */
if (c == '\n')
serial_putc ('\r');
}
/*
* Read a single byte from the serial port. Returns 1 on success, 0
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
static int sa1100_serial_tstc(void)
{
#ifdef CONFIG_SERIAL1
return Ser1UTSR1 & UTSR1_RNE;
#elif defined(CONFIG_SERIAL3)
return Ser3UTSR1 & UTSR1_RNE;
#endif
}
/*
* Read a single byte from the serial port. Returns 1 on success, 0
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
static int sa1100_serial_getc(void)
{
#ifdef CONFIG_SERIAL1
while (!(Ser1UTSR1 & UTSR1_RNE));
return (char) Ser1UTDR & 0xff;
#elif defined(CONFIG_SERIAL3)
while (!(Ser3UTSR1 & UTSR1_RNE));
return (char) Ser3UTDR & 0xff;
#endif
}
static struct serial_device sa1100_serial_drv = {
.name = "sa1100_serial",
.start = sa1100_serial_init,
.stop = NULL,
.setbrg = sa1100_serial_setbrg,
.putc = sa1100_serial_putc,
.puts = default_serial_puts,
.getc = sa1100_serial_getc,
.tstc = sa1100_serial_tstc,
};
void sa1100_serial_initialize(void)
{
serial_register(&sa1100_serial_drv);
}
__weak struct serial_device *default_serial_console(void)
{
return &sa1100_serial_drv;
}