336 lines
7.5 KiB
C
336 lines
7.5 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 <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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#ifdef CONFIG_KIRKWOOD
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#include <asm/arch/kirkwood.h>
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#endif
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#ifdef CONFIG_ORION5X
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#include <asm/arch/orion5x.h>
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#endif
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#if defined (CONFIG_SERIAL_MULTI)
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#include <serial.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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#if !defined(CONFIG_CONS_INDEX)
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#if defined (CONFIG_SERIAL_MULTI)
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/* with CONFIG_SERIAL_MULTI we might have no console
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* on these devices
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*/
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#else
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#error "No console index specified."
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#endif /* CONFIG_SERIAL_MULTI */
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#elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4)
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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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#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[4] = {
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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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};
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#define PORT serial_ports[port-1]
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#if defined(CONFIG_CONS_INDEX)
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#define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1])
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#endif
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#if defined(CONFIG_SERIAL_MULTI)
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/* Multi serial device functions */
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#define DECLARE_ESERIAL_FUNCTIONS(port) \
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int eserial##port##_init (void) {\
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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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void eserial##port##_setbrg (void) {\
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serial_setbrg_dev(port);}\
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int eserial##port##_getc (void) {\
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return serial_getc_dev(port);}\
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int eserial##port##_tstc (void) {\
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return serial_tstc_dev(port);}\
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void eserial##port##_putc (const char c) {\
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serial_putc_dev(port, c);}\
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void eserial##port##_puts (const char *s) {\
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serial_puts_dev(port, s);}
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/* Serial device descriptor */
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#define INIT_ESERIAL_STRUCTURE(port,name,bus) {\
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name,\
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bus,\
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eserial##port##_init,\
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NULL,\
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eserial##port##_setbrg,\
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eserial##port##_getc,\
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eserial##port##_tstc,\
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eserial##port##_putc,\
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eserial##port##_puts, }
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#endif /* CONFIG_SERIAL_MULTI */
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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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#if !defined(CONFIG_SERIAL_MULTI)
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int serial_init (void)
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{
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int clock_divisor;
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#ifdef CONFIG_NS87308
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initialise_ns87308();
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#endif
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#ifdef CONFIG_SYS_NS16550_COM1
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clock_divisor = calc_divisor(serial_ports[0]);
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NS16550_init(serial_ports[0], clock_divisor);
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#endif
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#ifdef CONFIG_SYS_NS16550_COM2
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clock_divisor = calc_divisor(serial_ports[1]);
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NS16550_init(serial_ports[1], clock_divisor);
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#endif
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#ifdef CONFIG_SYS_NS16550_COM3
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clock_divisor = calc_divisor(serial_ports[2]);
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NS16550_init(serial_ports[2], clock_divisor);
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#endif
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#ifdef CONFIG_SYS_NS16550_COM4
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clock_divisor = calc_divisor(serial_ports[3]);
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NS16550_init(serial_ports[3], clock_divisor);
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#endif
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return (0);
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}
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#endif
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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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#if defined(CONFIG_SERIAL_MULTI)
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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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#else
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void
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serial_putc(const char c)
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{
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_serial_putc(c,CONFIG_CONS_INDEX);
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}
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#endif
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#if defined(CONFIG_SERIAL_MULTI)
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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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#else
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void
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serial_putc_raw(const char c)
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{
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_serial_putc_raw(c,CONFIG_CONS_INDEX);
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}
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#endif
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#if defined(CONFIG_SERIAL_MULTI)
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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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#else
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void
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serial_puts(const char *s)
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{
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_serial_puts(s,CONFIG_CONS_INDEX);
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}
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#endif
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#if defined(CONFIG_SERIAL_MULTI)
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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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#else
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int
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serial_getc(void)
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{
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return _serial_getc(CONFIG_CONS_INDEX);
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}
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#endif
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#if defined(CONFIG_SERIAL_MULTI)
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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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#else
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int
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serial_tstc(void)
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{
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return _serial_tstc(CONFIG_CONS_INDEX);
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}
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#endif
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#if defined(CONFIG_SERIAL_MULTI)
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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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#else
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void
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serial_setbrg(void)
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{
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_serial_setbrg(CONFIG_CONS_INDEX);
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}
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#endif
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#if defined(CONFIG_SERIAL_MULTI)
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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","EUART1");
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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","EUART2");
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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","EUART3");
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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","EUART4");
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#endif /* CONFIG_SERIAL_MULTI */
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