/* * (C) Copyright 2000 * Rob Taylor, Flying Pig Systems. robt@flyingpig.com. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #ifdef CONFIG_SYS_NS16550_SERIAL #include <ns16550.h> #ifdef CONFIG_NS87308 #include <ns87308.h> #endif #if defined (CONFIG_SERIAL_MULTI) #include <serial.h> #endif DECLARE_GLOBAL_DATA_PTR; #if !defined(CONFIG_CONS_INDEX) #if defined (CONFIG_SERIAL_MULTI) /* with CONFIG_SERIAL_MULTI we might have no console * on these devices */ #else #error "No console index specified." #endif /* CONFIG_SERIAL_MULTI */ #elif (CONFIG_CONS_INDEX < 1) || (CONFIG_CONS_INDEX > 4) #error "Invalid console index value." #endif #if CONFIG_CONS_INDEX == 1 && !defined(CONFIG_SYS_NS16550_COM1) #error "Console port 1 defined but not configured." #elif CONFIG_CONS_INDEX == 2 && !defined(CONFIG_SYS_NS16550_COM2) #error "Console port 2 defined but not configured." #elif CONFIG_CONS_INDEX == 3 && !defined(CONFIG_SYS_NS16550_COM3) #error "Console port 3 defined but not configured." #elif CONFIG_CONS_INDEX == 4 && !defined(CONFIG_SYS_NS16550_COM4) #error "Console port 4 defined but not configured." #endif /* Note: The port number specified in the functions is 1 based. * the array is 0 based. */ static NS16550_t serial_ports[4] = { #ifdef CONFIG_SYS_NS16550_COM1 (NS16550_t)CONFIG_SYS_NS16550_COM1, #else NULL, #endif #ifdef CONFIG_SYS_NS16550_COM2 (NS16550_t)CONFIG_SYS_NS16550_COM2, #else NULL, #endif #ifdef CONFIG_SYS_NS16550_COM3 (NS16550_t)CONFIG_SYS_NS16550_COM3, #else NULL, #endif #ifdef CONFIG_SYS_NS16550_COM4 (NS16550_t)CONFIG_SYS_NS16550_COM4 #else NULL #endif }; #define PORT serial_ports[port-1] #if defined(CONFIG_CONS_INDEX) #define CONSOLE (serial_ports[CONFIG_CONS_INDEX-1]) #endif #if defined(CONFIG_SERIAL_MULTI) /* Multi serial device functions */ #define DECLARE_ESERIAL_FUNCTIONS(port) \ int eserial##port##_init (void) {\ int clock_divisor; \ clock_divisor = calc_divisor(serial_ports[port-1]); \ NS16550_init(serial_ports[port-1], clock_divisor); \ return(0);}\ void eserial##port##_setbrg (void) {\ serial_setbrg_dev(port);}\ int eserial##port##_getc (void) {\ return serial_getc_dev(port);}\ int eserial##port##_tstc (void) {\ return serial_tstc_dev(port);}\ void eserial##port##_putc (const char c) {\ serial_putc_dev(port, c);}\ void eserial##port##_puts (const char *s) {\ serial_puts_dev(port, s);} /* Serial device descriptor */ #define INIT_ESERIAL_STRUCTURE(port,name,bus) {\ name,\ bus,\ eserial##port##_init,\ eserial##port##_setbrg,\ eserial##port##_getc,\ eserial##port##_tstc,\ eserial##port##_putc,\ eserial##port##_puts, } #endif /* CONFIG_SERIAL_MULTI */ static int calc_divisor (NS16550_t port) { #ifdef CONFIG_OMAP1510 /* If can't cleanly clock 115200 set div to 1 */ if ((CONFIG_SYS_NS16550_CLK == 12000000) && (gd->baudrate == 115200)) { port->osc_12m_sel = OSC_12M_SEL; /* enable 6.5 * divisor */ return (1); /* return 1 for base divisor */ } port->osc_12m_sel = 0; /* clear if previsouly set */ #endif #ifdef CONFIG_OMAP1610 /* If can't cleanly clock 115200 set div to 1 */ if ((CONFIG_SYS_NS16550_CLK == 48000000) && (gd->baudrate == 115200)) { return (26); /* return 26 for base divisor */ } #endif #ifdef CONFIG_APTIX #define MODE_X_DIV 13 #else #define MODE_X_DIV 16 #endif /* Compute divisor value. Normally, we should simply return: * CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate * but we need to round that value by adding 0.5. * Rounding is especially important at high baud rates. */ return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) / (MODE_X_DIV * gd->baudrate); } #if !defined(CONFIG_SERIAL_MULTI) int serial_init (void) { int clock_divisor; #ifdef CONFIG_NS87308 initialise_ns87308(); #endif #ifdef CONFIG_SYS_NS16550_COM1 clock_divisor = calc_divisor(serial_ports[0]); NS16550_init(serial_ports[0], clock_divisor); #endif #ifdef CONFIG_SYS_NS16550_COM2 clock_divisor = calc_divisor(serial_ports[1]); NS16550_init(serial_ports[1], clock_divisor); #endif #ifdef CONFIG_SYS_NS16550_COM3 clock_divisor = calc_divisor(serial_ports[2]); NS16550_init(serial_ports[2], clock_divisor); #endif #ifdef CONFIG_SYS_NS16550_COM4 clock_divisor = calc_divisor(serial_ports[3]); NS16550_init(serial_ports[3], clock_divisor); #endif return (0); } #endif void _serial_putc(const char c,const int port) { if (c == '\n') NS16550_putc(PORT, '\r'); NS16550_putc(PORT, c); } void _serial_putc_raw(const char c,const int port) { NS16550_putc(PORT, c); } void _serial_puts (const char *s,const int port) { while (*s) { _serial_putc (*s++,port); } } int _serial_getc(const int port) { return NS16550_getc(PORT); } int _serial_tstc(const int port) { return NS16550_tstc(PORT); } void _serial_setbrg (const int port) { int clock_divisor; clock_divisor = calc_divisor(PORT); NS16550_reinit(PORT, clock_divisor); } #if defined(CONFIG_SERIAL_MULTI) static inline void serial_putc_dev(unsigned int dev_index,const char c) { _serial_putc(c,dev_index); } #else void serial_putc(const char c) { _serial_putc(c,CONFIG_CONS_INDEX); } #endif #if defined(CONFIG_SERIAL_MULTI) static inline void serial_putc_raw_dev(unsigned int dev_index,const char c) { _serial_putc_raw(c,dev_index); } #else void serial_putc_raw(const char c) { _serial_putc_raw(c,CONFIG_CONS_INDEX); } #endif #if defined(CONFIG_SERIAL_MULTI) static inline void serial_puts_dev(unsigned int dev_index,const char *s) { _serial_puts(s,dev_index); } #else void serial_puts(const char *s) { _serial_puts(s,CONFIG_CONS_INDEX); } #endif #if defined(CONFIG_SERIAL_MULTI) static inline int serial_getc_dev(unsigned int dev_index) { return _serial_getc(dev_index); } #else int serial_getc(void) { return _serial_getc(CONFIG_CONS_INDEX); } #endif #if defined(CONFIG_SERIAL_MULTI) static inline int serial_tstc_dev(unsigned int dev_index) { return _serial_tstc(dev_index); } #else int serial_tstc(void) { return _serial_tstc(CONFIG_CONS_INDEX); } #endif #if defined(CONFIG_SERIAL_MULTI) static inline void serial_setbrg_dev(unsigned int dev_index) { _serial_setbrg(dev_index); } #else void serial_setbrg(void) { _serial_setbrg(CONFIG_CONS_INDEX); } #endif #if defined(CONFIG_SERIAL_MULTI) DECLARE_ESERIAL_FUNCTIONS(1); struct serial_device eserial1_device = INIT_ESERIAL_STRUCTURE(1,"eserial0","EUART1"); DECLARE_ESERIAL_FUNCTIONS(2); struct serial_device eserial2_device = INIT_ESERIAL_STRUCTURE(2,"eserial1","EUART2"); DECLARE_ESERIAL_FUNCTIONS(3); struct serial_device eserial3_device = INIT_ESERIAL_STRUCTURE(3,"eserial2","EUART3"); DECLARE_ESERIAL_FUNCTIONS(4); struct serial_device eserial4_device = INIT_ESERIAL_STRUCTURE(4,"eserial3","EUART4"); #endif /* CONFIG_SERIAL_MULTI */ #endif