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a30a422084
Implement support for CONFIG_SERIAL_MULTI into sa1100 serial driver. This driver was so far only usable directly, but this patch also adds support for the multi method. This allows using more than one serial driver alongside the sa1100 driver. Also, add a weak implementation of default_serial_console() returning this driver. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Tom Rini <trini@ti.com>
214 lines
4.5 KiB
C
214 lines
4.5 KiB
C
/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <SA-1100.h>
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#include <serial.h>
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#include <linux/compiler.h>
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DECLARE_GLOBAL_DATA_PTR;
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static void sa1100_serial_setbrg(void)
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{
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unsigned int reg = 0;
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if (gd->baudrate == 1200)
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reg = 191;
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else if (gd->baudrate == 9600)
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reg = 23;
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else if (gd->baudrate == 19200)
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reg = 11;
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else if (gd->baudrate == 38400)
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reg = 5;
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else if (gd->baudrate == 57600)
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reg = 3;
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else if (gd->baudrate == 115200)
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reg = 1;
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else
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hang ();
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#ifdef CONFIG_SERIAL1
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/* SA1110 uart function */
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Ser1SDCR0 |= SDCR0_SUS;
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/* Wait until port is ready ... */
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while(Ser1UTSR1 & UTSR1_TBY) {}
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/* init serial serial 1 */
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Ser1UTCR3 = 0x00;
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Ser1UTSR0 = 0xff;
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Ser1UTCR0 = ( UTCR0_1StpBit | UTCR0_8BitData );
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Ser1UTCR1 = 0;
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Ser1UTCR2 = (u32)reg;
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Ser1UTCR3 = ( UTCR3_RXE | UTCR3_TXE );
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#elif defined(CONFIG_SERIAL3)
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/* Wait until port is ready ... */
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while (Ser3UTSR1 & UTSR1_TBY) {
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}
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/* init serial serial 3 */
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Ser3UTCR3 = 0x00;
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Ser3UTSR0 = 0xff;
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Ser3UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData);
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Ser3UTCR1 = 0;
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Ser3UTCR2 = (u32) reg;
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Ser3UTCR3 = (UTCR3_RXE | UTCR3_TXE);
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#else
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#error "Bad: you didn't configured serial ..."
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#endif
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}
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/*
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* Initialise the serial port with the given baudrate. The settings
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* are always 8 data bits, no parity, 1 stop bit, no start bits.
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*
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*/
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static int sa1100_serial_init(void)
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{
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serial_setbrg ();
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return (0);
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}
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/*
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* Output a single byte to the serial port.
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*/
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static void sa1100_serial_putc(const char c)
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{
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#ifdef CONFIG_SERIAL1
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/* wait for room in the tx FIFO on SERIAL1 */
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while ((Ser1UTSR0 & UTSR0_TFS) == 0);
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Ser1UTDR = c;
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#elif defined(CONFIG_SERIAL3)
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/* wait for room in the tx FIFO on SERIAL3 */
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while ((Ser3UTSR0 & UTSR0_TFS) == 0);
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Ser3UTDR = c;
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#endif
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/* If \n, also do \r */
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if (c == '\n')
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serial_putc ('\r');
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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static int sa1100_serial_tstc(void)
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{
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#ifdef CONFIG_SERIAL1
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return Ser1UTSR1 & UTSR1_RNE;
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#elif defined(CONFIG_SERIAL3)
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return Ser3UTSR1 & UTSR1_RNE;
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#endif
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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static int sa1100_serial_getc(void)
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{
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#ifdef CONFIG_SERIAL1
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while (!(Ser1UTSR1 & UTSR1_RNE));
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return (char) Ser1UTDR & 0xff;
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#elif defined(CONFIG_SERIAL3)
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while (!(Ser3UTSR1 & UTSR1_RNE));
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return (char) Ser3UTDR & 0xff;
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#endif
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}
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static void sa1100_serial_puts(const char *s)
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{
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while (*s) {
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serial_putc (*s++);
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}
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}
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#ifdef CONFIG_SERIAL_MULTI
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static struct serial_device sa1100_serial_drv = {
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.name = "sa1100_serial",
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.start = sa1100_serial_init,
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.stop = NULL,
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.setbrg = sa1100_serial_setbrg,
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.putc = sa1100_serial_putc,
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.puts = sa1100_serial_puts,
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.getc = sa1100_serial_getc,
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.tstc = sa1100_serial_tstc,
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};
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void sa1100_serial_initialize(void)
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{
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serial_register(&sa1100_serial_drv);
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}
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__weak struct serial_device *default_serial_console(void)
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{
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return &sa1100_serial_drv;
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}
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#else
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int serial_init(void)
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{
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return sa1100_serial_init();
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}
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void serial_setbrg(void)
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{
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sa1100_serial_setbrg();
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}
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void serial_putc(const char c)
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{
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sa1100_serial_putc(c);
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}
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void serial_puts(const char *s)
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{
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sa1100_serial_puts(s);
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}
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int serial_getc(void)
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{
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return sa1100_serial_getc();
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}
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int serial_tstc(void)
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{
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return sa1100_serial_tstc();
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}
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#endif
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