diff options
Diffstat (limited to 'drivers/serial/s3c4510b_uart.c')
| -rw-r--r-- | drivers/serial/s3c4510b_uart.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/drivers/serial/s3c4510b_uart.c b/drivers/serial/s3c4510b_uart.c deleted file mode 100644 index 423d26e6..0000000 --- a/drivers/serial/s3c4510b_uart.c +++ /dev/null @@ -1,233 +0,0 @@ -/* - * Copyright (c) 2004 Cucy Systems (http://www.cucy.com) - * Curt Brune <curt@cucy.com> - * - * (C) Copyright 2004 - * DAVE Srl - * http://www.dave-tech.it - * http://www.wawnet.biz - * mailto:info@wawnet.biz - * - * (C) Copyright 2002-2004 - * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Marius Groeger <mgroeger@sysgo.de> - * - * (C) Copyright 2002 - * Sysgo Real-Time Solutions, GmbH <www.elinos.com> - * Alex Zuepke <azu@sysgo.de> - * - * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) - * - * 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 - * - * MODULE: $Id:$ - * Description: UART/Serial interface for Samsung S3C4510B SoC - * Runtime Env: ARM7TDMI - * Change History: - * 03-02-04 Create (Curt Brune) curt@cucy.com - * - */ - -#include <common.h> - -#include <asm/hardware.h> -#include "s3c4510b_uart.h" - -DECLARE_GLOBAL_DATA_PTR; - -static UART *uart; - -/* flush serial input queue. returns 0 on success or negative error - * number otherwise - */ -static int serial_flush_input(void) -{ - volatile u32 tmp; - - /* keep on reading as long as the receiver is not empty */ - while( uart->m_stat.bf.rxReady) { - tmp = uart->m_rx; - } - - return 0; -} - - -/* flush output queue. returns 0 on success or negative error number - * otherwise - */ -static int serial_flush_output(void) -{ - /* wait until the transmitter is no longer busy */ - while( !uart->m_stat.bf.txBufEmpty); - - return 0; -} - - -static void s3c4510b_serial_setbrg(void) -{ - UART_LINE_CTRL ulctrl; - UART_CTRL uctrl; - UART_BAUD_DIV ubd; - - serial_flush_output(); - serial_flush_input(); - - /* control register */ - uctrl.ui = 0x0; - uctrl.bf.rxMode = 0x1; - uctrl.bf.rxIrq = 0x0; - uctrl.bf.txMode = 0x1; - uctrl.bf.DSR = 0x0; - uctrl.bf.sendBreak = 0x0; - uctrl.bf.loopBack = 0x0; - uart->m_ctrl.ui = uctrl.ui; - - /* line control register */ - ulctrl.ui = 0x0; - ulctrl.bf.wordLen = 0x3; /* 8 bit data */ - ulctrl.bf.nStop = 0x0; /* 1 stop bit */ - ulctrl.bf.parity = 0x0; /* no parity */ - ulctrl.bf.clk = 0x0; /* internal clock */ - ulctrl.bf.infra_red = 0x0; /* no infra_red */ - uart->m_lineCtrl.ui = ulctrl.ui; - - ubd.ui = 0x0; - - /* see table on page 10-15 in SAMSUNG S3C4510B manual */ - /* get correct divisor */ - switch(gd->baudrate) { - case 1200: ubd.bf.cnt0 = 1301; break; - case 2400: ubd.bf.cnt0 = 650; break; - case 4800: ubd.bf.cnt0 = 324; break; - case 9600: ubd.bf.cnt0 = 162; break; - case 19200: ubd.bf.cnt0 = 80; break; - case 38400: ubd.bf.cnt0 = 40; break; - case 57600: ubd.bf.cnt0 = 26; break; - case 115200: ubd.bf.cnt0 = 13; break; - } - - uart->m_baudDiv.ui = ubd.ui; - uart->m_baudCnt = 0x0; - uart->m_baudClk = 0x0; - -} - - -/* - * Initialise the serial port with the given baudrate. The settings - * are always 8 data bits, no parity, 1 stop bit, no start bits. - * - */ -static int s3c4510b_serial_init(void) -{ - -#if CONFIG_SERIAL1 == 1 - uart = (UART *)UART0_BASE; -#elif CONFIG_SERIAL1 == 2 - uart = (UART *)UART1_BASE; -#else -#error CONFIG_SERIAL1 not equal to 1 or 2 -#endif - - serial_setbrg (); - - return (0); -} - - -/* - * Output a single byte to the serial port. - */ -static void s3c4510_serial_putc(const char c) -{ - /* wait for room in the transmit FIFO */ - while( !uart->m_stat.bf.txBufEmpty); - - uart->m_tx = c; - - /* - to be polite with serial console add a line feed - to the carriage return character - */ - if (c=='\n') - serial_putc('\r'); -} - -/* - * Test if an input byte is ready from the serial port. Returns non-zero on - * success, 0 otherwise. - */ -static int s3c4510b_serial_tstc(void) -{ - return uart->m_stat.bf.rxReady; -} - -/* - * 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. - */ -static int s3c4510b_serial_getc(void) -{ - int rv; - - for(;;) { - rv = serial_tstc(); - - if (rv) { - return uart->m_rx & 0xFF; - } - } -} - -static void s3c4510b_serial_puts(const char *s) -{ - while (*s) { - serial_putc (*s++); - } - - /* busy wait for tx complete */ - while ( !uart->m_stat.bf.txComplete); - - /* clear break */ - uart->m_ctrl.bf.sendBreak = 0; - -} - -static struct serial_device s3c4510b_serial_drv = { - .name = "s3c4510b_serial", - .start = s3c4510b_serial_init, - .stop = NULL, - .setbrg = s3c4510b_serial_setbrg, - .putc = s3c4510b_serial_putc, - .puts = s3c4510b_serial_puts, - .getc = s3c4510b_serial_getc, - .tstc = s3c4510b_serial_tstc, -}; - -void s3c4510b_serial_initialize(void) -{ - serial_register(&s3c4510b_serial_drv); -} - -__weak struct serial_device *default_serial_console(void) -{ - return &s3c4510b_serial_drv; -} |