mirror of
https://github.com/smaeul/u-boot.git
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307 lines
7.2 KiB
C
307 lines
7.2 KiB
C
/*
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* (C) Copyright 2000
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* Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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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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#include <common.h>
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#include <linux/compiler.h>
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#include <ns16550.h>
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#ifdef CONFIG_NS87308
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#include <ns87308.h>
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#endif
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#include <serial.h>
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DECLARE_GLOBAL_DATA_PTR;
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#if !defined(CONFIG_CONS_INDEX)
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#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 6)
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#error "Invalid console index value."
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#endif
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#if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1)
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#error "Console port 1 defined but not configured."
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#elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2)
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#error "Console port 2 defined but not configured."
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#elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3)
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#error "Console port 3 defined but not configured."
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#elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4)
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#error "Console port 4 defined but not configured."
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#elif CONFIG_CONS_INDEX == 5 && !defined(CONFIG_SYS_NS16550_COM5)
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#error "Console port 5 defined but not configured."
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#elif CONFIG_CONS_INDEX == 6 && !defined(CONFIG_SYS_NS16550_COM6)
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#error "Console port 6 defined but not configured."
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#endif
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/* Note: The port number specified in the functions is 1 based.
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* the array is 0 based.
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*/
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static NS16550_t serial_ports[6] = {
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#ifdef CONFIG_SYS_NS16550_COM1
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(NS16550_t)CONFIG_SYS_NS16550_COM1,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM2
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(NS16550_t)CONFIG_SYS_NS16550_COM2,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM3
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(NS16550_t)CONFIG_SYS_NS16550_COM3,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM4
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(NS16550_t)CONFIG_SYS_NS16550_COM4,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM5
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(NS16550_t)CONFIG_SYS_NS16550_COM5,
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#else
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NULL,
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#endif
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#ifdef CONFIG_SYS_NS16550_COM6
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(NS16550_t)CONFIG_SYS_NS16550_COM6
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#else
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NULL
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#endif
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};
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#define PORT serial_ports[port-1]
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/* Multi serial device functions */
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#define DECLARE_ESERIAL_FUNCTIONS(port) \
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static int eserial##port##_init(void) \
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{ \
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int clock_divisor; \
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clock_divisor = calc_divisor(serial_ports[port-1]); \
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NS16550_init(serial_ports[port-1], clock_divisor); \
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return 0 ; \
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} \
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static void eserial##port##_setbrg(void) \
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{ \
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serial_setbrg_dev(port); \
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} \
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static int eserial##port##_getc(void) \
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{ \
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return serial_getc_dev(port); \
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} \
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static int eserial##port##_tstc(void) \
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{ \
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return serial_tstc_dev(port); \
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} \
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static void eserial##port##_putc(const char c) \
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{ \
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serial_putc_dev(port, c); \
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} \
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static void eserial##port##_puts(const char *s) \
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{ \
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serial_puts_dev(port, s); \
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}
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/* Serial device descriptor */
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#define INIT_ESERIAL_STRUCTURE(port, __name) { \
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.name = __name, \
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.start = eserial##port##_init, \
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.stop = NULL, \
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.setbrg = eserial##port##_setbrg, \
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.getc = eserial##port##_getc, \
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.tstc = eserial##port##_tstc, \
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.putc = eserial##port##_putc, \
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.puts = eserial##port##_puts, \
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}
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static int calc_divisor (NS16550_t port)
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{
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#ifdef CONFIG_OMAP1510
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/* If can't cleanly clock 115200 set div to 1 */
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if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) {
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port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */
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return (1); /* return 1 for base divisor */
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}
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port->osc_12m_sel = 0; /* clear if previsouly set */
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#endif
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#ifdef CONFIG_OMAP1610
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/* If can't cleanly clock 115200 set div to 1 */
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if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) {
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return (26); /* return 26 for base divisor */
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}
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#endif
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#ifdef CONFIG_APTIX
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#define MODE_X_DIV 13
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#else
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#define MODE_X_DIV 16
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#endif
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/* Compute divisor value. Normally, we should simply return:
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* CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate
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* but we need to round that value by adding 0.5.
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* Rounding is especially important at high baud rates.
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*/
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return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
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(MODE_X_DIV * gd->baudrate);
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}
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void
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_serial_putc(const char c,const int port)
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{
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if (c == '\n')
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NS16550_putc(PORT, '\r');
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NS16550_putc(PORT, c);
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}
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void
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_serial_putc_raw(const char c,const int port)
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{
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NS16550_putc(PORT, c);
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}
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void
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_serial_puts (const char *s,const int port)
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{
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while (*s) {
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_serial_putc (*s++,port);
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}
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}
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int
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_serial_getc(const int port)
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{
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return NS16550_getc(PORT);
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}
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int
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_serial_tstc(const int port)
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{
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return NS16550_tstc(PORT);
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}
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void
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_serial_setbrg (const int port)
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{
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int clock_divisor;
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clock_divisor = calc_divisor(PORT);
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NS16550_reinit(PORT, clock_divisor);
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}
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static inline void
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serial_putc_dev(unsigned int dev_index,const char c)
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{
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_serial_putc(c,dev_index);
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}
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static inline void
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serial_putc_raw_dev(unsigned int dev_index,const char c)
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{
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_serial_putc_raw(c,dev_index);
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}
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static inline void
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serial_puts_dev(unsigned int dev_index,const char *s)
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{
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_serial_puts(s,dev_index);
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}
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static inline int
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serial_getc_dev(unsigned int dev_index)
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{
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return _serial_getc(dev_index);
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}
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static inline int
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serial_tstc_dev(unsigned int dev_index)
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{
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return _serial_tstc(dev_index);
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}
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static inline void
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serial_setbrg_dev(unsigned int dev_index)
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{
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_serial_setbrg(dev_index);
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}
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DECLARE_ESERIAL_FUNCTIONS(1);
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struct serial_device eserial1_device =
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INIT_ESERIAL_STRUCTURE(1, "eserial0");
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DECLARE_ESERIAL_FUNCTIONS(2);
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struct serial_device eserial2_device =
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INIT_ESERIAL_STRUCTURE(2, "eserial1");
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DECLARE_ESERIAL_FUNCTIONS(3);
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struct serial_device eserial3_device =
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INIT_ESERIAL_STRUCTURE(3, "eserial2");
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DECLARE_ESERIAL_FUNCTIONS(4);
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struct serial_device eserial4_device =
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INIT_ESERIAL_STRUCTURE(4, "eserial3");
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DECLARE_ESERIAL_FUNCTIONS(5);
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struct serial_device eserial5_device =
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INIT_ESERIAL_STRUCTURE(5, "eserial4");
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DECLARE_ESERIAL_FUNCTIONS(6);
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struct serial_device eserial6_device =
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INIT_ESERIAL_STRUCTURE(6, "eserial5");
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__weak struct serial_device *default_serial_console(void)
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{
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#if CONFIG_CONS_INDEX == 1
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return &eserial1_device;
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#elif CONFIG_CONS_INDEX == 2
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return &eserial2_device;
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#elif CONFIG_CONS_INDEX == 3
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return &eserial3_device;
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#elif CONFIG_CONS_INDEX == 4
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return &eserial4_device;
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#elif CONFIG_CONS_INDEX == 5
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return &eserial5_device;
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#elif CONFIG_CONS_INDEX == 6
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return &eserial6_device;
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#else
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#error "Bad CONFIG_CONS_INDEX."
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#endif
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}
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void ns16550_serial_initialize(void)
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{
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#if defined(CONFIG_SYS_NS16550_COM1)
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serial_register(&eserial1_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_COM2)
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serial_register(&eserial2_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_COM3)
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serial_register(&eserial3_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_COM4)
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serial_register(&eserial4_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_COM5)
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serial_register(&eserial5_device);
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#endif
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#if defined(CONFIG_SYS_NS16550_COM6)
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serial_register(&eserial6_device);
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#endif
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}
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