/* * (C) Copyright 2002 * Gary Jennejohn, DENX Software Engineering, * * 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 #if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) #if defined(CONFIG_S3C2400) || defined(CONFIG_TRAB) #include #elif defined(CONFIG_S3C2410) #include #endif DECLARE_GLOBAL_DATA_PTR; #ifdef CONFIG_SERIAL1 #define UART_NR S3C24X0_UART0 #elif defined(CONFIG_SERIAL2) # if defined(CONFIG_TRAB) # error "TRAB supports only CONFIG_SERIAL1" # endif #define UART_NR S3C24X0_UART1 #elif defined(CONFIG_SERIAL3) # if defined(CONFIG_TRAB) # #error "TRAB supports only CONFIG_SERIAL1" # endif #define UART_NR S3C24X0_UART2 #else #error "Bad: you didn't configure serial ..." #endif #if defined(CONFIG_SERIAL_MULTI) #include /* Multi serial device functions */ #define DECLARE_S3C_SERIAL_FUNCTIONS(port) \ int s3serial##port##_init (void) {\ return serial_init_dev(port);}\ void s3serial##port##_setbrg (void) {\ serial_setbrg_dev(port);}\ int s3serial##port##_getc (void) {\ return serial_getc_dev(port);}\ int s3serial##port##_tstc (void) {\ return serial_tstc_dev(port);}\ void s3serial##port##_putc (const char c) {\ serial_putc_dev(port, c);}\ void s3serial##port##_puts (const char *s) {\ serial_puts_dev(port, s);} #define INIT_S3C_SERIAL_STRUCTURE(port,name,bus) {\ name,\ bus,\ s3serial##port##_init,\ s3serial##port##_setbrg,\ s3serial##port##_getc,\ s3serial##port##_tstc,\ s3serial##port##_putc,\ s3serial##port##_puts, } #endif /* CONFIG_SERIAL_MULTI */ void _serial_setbrg(const int dev_index) { S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); unsigned int reg = 0; int i; /* value is calculated so : (int)(PCLK/16./baudrate) -1 */ reg = get_PCLK() / (16 * gd->baudrate) - 1; uart->UBRDIV = reg; for (i = 0; i < 100; i++); } #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(UART_NR); } #endif /* Initialise the serial port. The settings are always 8 data bits, no parity, * 1 stop bit, no start bits. */ static int serial_init_dev(const int dev_index) { S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); int i; /* FIFO enable, Tx/Rx FIFO clear */ uart->UFCON = 0x07; uart->UMCON = 0x0; /* Normal,No parity,1 stop,8 bit */ uart->ULCON = 0x3; /* * tx=level,rx=edge,disable timeout int.,enable rx error int., * normal,interrupt or polling */ uart->UCON = 0x245; #ifdef CONFIG_HWFLOW uart->UMCON = 0x1; /* RTS up */ #endif /* FIXME: This is sooooooooooooooooooo ugly */ #if defined(CONFIG_ARCH_GTA02_v1) || defined(CONFIG_ARCH_GTA02_v2) /* we need auto hw flow control on the gsm and gps port */ if (dev_index == 0 || dev_index == 1) uart->UMCON = 0x10; #endif _serial_setbrg(dev_index); return (0); } #if !defined(CONFIG_SERIAL_MULTI) /* Initialise the serial port. The settings are always 8 data bits, no parity, * 1 stop bit, no start bits. */ int serial_init (void) { return serial_init_dev(UART_NR); } #endif /* * Read a single byte from the serial port. Returns 1 on success, 0 * otherwise. When the function is succesfull, the character read is * written into its argument c. */ int _serial_getc (const int dev_index) { S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); /* wait for character to arrive */ while (!(uart->UTRSTAT & 0x1)); return uart->URXH & 0xff; } #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(UART_NR); } #endif #ifdef CONFIG_HWFLOW static int hwflow = 0; /* turned off by default */ int hwflow_onoff(int on) { switch(on) { case 0: default: break; /* return current */ case 1: hwflow = 1; /* turn on */ break; case -1: hwflow = 0; /* turn off */ break; } return hwflow; } #endif #ifdef CONFIG_MODEM_SUPPORT static int be_quiet = 0; void disable_putc(void) { be_quiet = 1; } void enable_putc(void) { be_quiet = 0; } #endif /* * Output a single byte to the serial port. */ void _serial_putc (const char c, const int dev_index) { S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); #ifdef CONFIG_MODEM_SUPPORT if (be_quiet) return; #endif /* wait for room in the tx FIFO */ while (!(uart->UTRSTAT & 0x2)); #ifdef CONFIG_HWFLOW /* Wait for CTS up */ while(hwflow && !(uart->UMSTAT & 0x1)) ; #endif uart->UTXH = c; /* If \n, also do \r */ if (c == '\n') serial_putc ('\r'); } #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, UART_NR); } #endif /* * Test whether a character is in the RX buffer */ int _serial_tstc(const int dev_index) { S3C24X0_UART * const uart = S3C24X0_GetBase_UART(dev_index); return uart->UTRSTAT & 0x1; } #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(UART_NR); } #endif void _serial_puts(const char *s, const int dev_index) { while (*s) { _serial_putc (*s++, dev_index); } } #if defined(CONFIG_SERIAL_MULTI) static inline void serial_puts_dev(int dev_index, const char *s) { _serial_puts(s, dev_index); } #else void serial_puts (const char *s) { _serial_puts(s, UART_NR); } #endif #if defined(CONFIG_SERIAL_MULTI) DECLARE_S3C_SERIAL_FUNCTIONS(0); struct serial_device s3c24xx_serial0_device = INIT_S3C_SERIAL_STRUCTURE(0, "s3ser0", "S3UART1"); DECLARE_S3C_SERIAL_FUNCTIONS(1); struct serial_device s3c24xx_serial1_device = INIT_S3C_SERIAL_STRUCTURE(1, "s3ser1", "S3UART2"); DECLARE_S3C_SERIAL_FUNCTIONS(2); struct serial_device s3c24xx_serial2_device = INIT_S3C_SERIAL_STRUCTURE(2, "s3ser2", "S3UART3"); #endif /* CONFIG_SERIAL_MULTI */ #endif /* defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) */