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https://github.com/brain-hackers/u-boot-brain
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d126f2850f
Implement support for CONFIG_SERIAL_MULTI into ml2 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 ml2 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> Cc: Anatolij Gustschin <agust@denx.de> Cc: Stefan Roese <sr@denx.de>
170 lines
3.3 KiB
C
170 lines
3.3 KiB
C
/*
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* (C) Copyright 2002
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* Peter De Schrijver (p2@mind.be), Mind Linux Solutions, NV.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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,
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* MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <asm/u-boot.h>
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#include <asm/processor.h>
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#include <command.h>
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#include <configs/ML2.h>
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#include <serial.h>
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#include <linux/compiler.h>
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#if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
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#include <ns16550.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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#if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
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const NS16550_t COM_PORTS[] = { (NS16550_t) CONFIG_SYS_NS16550_COM1,
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(NS16550_t) CONFIG_SYS_NS16550_COM2
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};
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#endif
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static int ml2_serial_init(void)
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{
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int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
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#ifdef CONFIG_SYS_INIT_CHAN1
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(void) NS16550_init (COM_PORTS[0], clock_divisor);
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#endif
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#ifdef CONFIG_SYS_INIT_CHAN2
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(void) NS16550_init (COM_PORTS[1], clock_divisor);
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#endif
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return 0;
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}
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static void ml2_serial_putc(const char c)
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{
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if (c == '\n')
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NS16550_putc (COM_PORTS[CONFIG_SYS_DUART_CHAN], '\r');
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NS16550_putc (COM_PORTS[CONFIG_SYS_DUART_CHAN], c);
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}
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static int ml2_serial_getc(void)
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{
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return NS16550_getc (COM_PORTS[CONFIG_SYS_DUART_CHAN]);
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}
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static int ml2_serial_tstc(void)
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{
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return NS16550_tstc (COM_PORTS[CONFIG_SYS_DUART_CHAN]);
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}
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static void ml2_serial_setbrg(void)
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{
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int clock_divisor = CONFIG_SYS_NS16550_CLK / 16 / gd->baudrate;
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#ifdef CONFIG_SYS_INIT_CHAN1
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NS16550_reinit (COM_PORTS[0], clock_divisor);
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#endif
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#ifdef CONFIG_SYS_INIT_CHAN2
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NS16550_reinit (COM_PORTS[1], clock_divisor);
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#endif
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}
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static void ml2_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 ml2_serial_drv = {
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.name = "ml2_serial",
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.start = ml2_serial_init,
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.stop = NULL,
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.setbrg = ml2_serial_setbrg,
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.putc = ml2_serial_putc,
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.puts = ml2_serial_puts,
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.getc = ml2_serial_getc,
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.tstc = ml2_serial_tstc,
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};
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void ml2_serial_initialize(void)
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{
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serial_register(&ml2_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 &ml2_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 ml2_serial_init();
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}
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void serial_setbrg(void)
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{
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ml2_serial_setbrg();
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}
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void serial_putc(const char c)
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{
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ml2_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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ml2_serial_puts(s);
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}
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int serial_getc(void)
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{
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return ml2_serial_getc();
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}
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int serial_tstc(void)
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{
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return ml2_serial_tstc();
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}
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#endif
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#if defined(CONFIG_CMD_KGDB)
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void kgdb_serial_init (void)
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{
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}
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void putDebugChar (int c)
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{
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serial_putc (c);
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}
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void putDebugStr (const char *str)
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{
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serial_puts (str);
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}
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int getDebugChar (void)
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{
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return serial_getc ();
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}
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void kgdb_interruptible (int yes)
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{
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return;
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}
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#endif
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