3 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #if defined(CONFIG_S3C2400) || defined(CONFIG_TRAB)
24 #elif defined(CONFIG_S3C2410)
29 #define UART_NR S3C24X0_UART0
32 # if defined(CONFIG_TRAB)
33 # #error "TRAB supports only CONFIG_SERIAL1"
35 #define UART_NR S3C24X0_UART1
38 # if defined(CONFIG_TRAB)
39 # #error "TRAB supports only CONFIG_SERIAL1"
41 #define UART_NR S3C24X0_UART2
44 #error "Bad: you didn't configure serial ..."
47 void serial_setbrg (void)
49 DECLARE_GLOBAL_DATA_PTR;
50 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
54 /* value is calculated so : (int)(PCLK/16./baudrate) -1 */
55 reg = get_PCLK() / (16 * gd->baudrate) - 1;
57 /* FIFO enable, Tx/Rx FIFO clear */
60 /* Normal,No parity,1 stop,8 bit */
63 * tx=level,rx=edge,disable timeout int.,enable rx error int.,
64 * normal,interrupt or polling
70 uart->UMCON = 0x1; /* RTS up */
72 for (i = 0; i < 100; i++);
76 * Initialise the serial port with the given baudrate. The settings
77 * are always 8 data bits, no parity, 1 stop bit, no start bits.
80 int serial_init (void)
88 * Read a single byte from the serial port. Returns 1 on success, 0
89 * otherwise. When the function is succesfull, the character read is
90 * written into its argument c.
92 int serial_getc (void)
94 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
96 /* wait for character to arrive */
97 while (!(uart->UTRSTAT & 0x1));
99 return uart->URXH & 0xff;
103 static int hwflow = 0; /* turned off by default */
104 int hwflow_onoff(int on)
109 break; /* return current */
111 hwflow = 1; /* turn on */
114 hwflow = 0; /* turn off */
121 #ifdef CONFIG_MODEM_SUPPORT
122 static int be_quiet = 0;
123 void disable_putc(void)
128 void enable_putc(void)
136 * Output a single byte to the serial port.
138 void serial_putc (const char c)
140 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
141 #ifdef CONFIG_MODEM_SUPPORT
146 /* wait for room in the tx FIFO */
147 while (!(uart->UTRSTAT & 0x2));
150 /* Wait for CTS up */
151 while(hwflow && !(uart->UMSTAT & 0x1))
157 /* If \n, also do \r */
163 * Test whether a character is in the RX buffer
165 int serial_tstc (void)
167 S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
169 return uart->UTRSTAT & 0x1;
173 serial_puts (const char *s)