Move TRAB burn-in tests to TRAB board directory

1 files changed, 203 insertions, 0 deletions

diff --git a/board/trab/rs485.c b/board/trab/rs485.c
new file mode 100644
index 0000000..774fd59
--- /dev/null
+++ b/board/trab/rs485.c
@@ -0,0 +1,203 @@
+/*
+ * (C) Copyright 2003
+ * Martin Krause, TQ-Systems GmbH, <martin.krause@tqs.de>
+ *
+ * Based on cpu/arm920t/serial.c, by Gary Jennejohn
+ * (C) Copyright 2002 Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * 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>
+#include <s3c2400.h>
+#include "rs485.h"
+
+static void rs485_setbrg (void);
+static void rs485_cfgio (void);
+static void set_rs485re(unsigned char rs485re_state);
+static void set_rs485de(unsigned char rs485de_state);
+static void rs485_setbrg (void);
+#ifdef	NOT_USED
+static void trab_rs485_disable_tx(void);
+static void trab_rs485_disable_rx(void);
+#endif
+
+#define UART_NR	S3C24X0_UART1
+
+/* CPLD-Register for controlling TRAB hardware functions */
+#define CPLD_RS485_RE           ((volatile unsigned long *)0x04028000)
+
+static void rs485_setbrg (void)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
+	int i;
+	unsigned int reg = 0;
+
+	/* value is calculated so : (int)(PCLK/16./baudrate) -1 */
+        /* reg = (33000000 / (16 * gd->baudrate)) - 1; */
+        reg = (33000000 / (16 * 38.400)) - 1;
+
+	/* 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;
+	uart->UBRDIV = reg;
+
+	for (i = 0; i < 100; i++);
+}
+
+static void rs485_cfgio (void)
+{
+        S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
+
+        gpio->PFCON &= ~(0x3 << 2);
+        gpio->PFCON |=  (0x2 << 2); /* configure GPF1 as RXD1 */
+
+        gpio->PFCON &= ~(0x3 << 6);
+        gpio->PFCON |=  (0x2 << 6); /* configure GPF3 as TXD1 */
+
+        gpio->PFUP |= (1 << 1); /* disable pullup on GPF1 */
+        gpio->PFUP |= (1 << 3); /* disable pullup on GPF3 */
+
+        gpio->PACON &= ~(1 << 11); /* set GPA11 (RS485_DE) to output */
+}
+
+/*
+ * Initialise the rs485 port with the given baudrate. The settings
+ * are always 8 data bits, no parity, 1 stop bit, no start bits.
+ *
+ */
+int rs485_init (void)
+{
+        rs485_cfgio ();
+        rs485_setbrg ();
+
+	return (0);
+}
+
+/*
+ * Read a single byte from the rs485 port. Returns 1 on success, 0
+ * otherwise. When the function is succesfull, the character read is
+ * written into its argument c.
+ */
+int rs485_getc (void)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
+
+	/* wait for character to arrive */
+	while (!(uart->UTRSTAT & 0x1));
+
+	return uart->URXH & 0xff;
+}
+
+/*
+ * Output a single byte to the rs485 port.
+ */
+void rs485_putc (const char c)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
+
+	/* wait for room in the tx FIFO */
+	while (!(uart->UTRSTAT & 0x2));
+
+	uart->UTXH = c;
+
+	/* If \n, also do \r */
+	if (c == '\n')
+		rs485_putc ('\r');
+}
+
+/*
+ * Test whether a character is in the RX buffer
+ */
+int rs485_tstc (void)
+{
+	S3C24X0_UART * const uart = S3C24X0_GetBase_UART(UART_NR);
+
+	return uart->UTRSTAT & 0x1;
+}
+
+void rs485_puts (const char *s)
+{
+	while (*s) {
+		rs485_putc (*s++);
+	}
+}
+
+
+/*
+ * State table:
+ *	RE	DE	Result
+ *	1	1	XMIT
+ *	0	0	RCV
+ *	1	0	Shutdown
+ */
+
+/* function that controls the receiver enable for the rs485 */
+/* rs485re_state reflects the level (0/1) of the RE pin */
+
+static void set_rs485re(unsigned char rs485re_state)
+{
+	if(rs485re_state)
+		*CPLD_RS485_RE = 0x010000;
+	else
+		*CPLD_RS485_RE = 0x0;
+}
+
+/* function that controls the sender enable for the rs485 */
+/* rs485de_state reflects the level (0/1) of the DE pin */
+
+static void set_rs485de(unsigned char rs485de_state)
+{
+        S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
+
+        /* This is on PORT A bit 11 */
+        if(rs485de_state)
+                gpio->PADAT |= (1 << 11);
+        else
+                gpio->PADAT &= ~(1 << 11);
+}
+
+
+void trab_rs485_enable_tx(void)
+{
+	set_rs485de(1);
+	set_rs485re(1);
+}
+
+void trab_rs485_enable_rx(void)
+{
+	set_rs485re(0);
+	set_rs485de(0);
+}
+
+#ifdef	NOT_USED
+static void trab_rs485_disable_tx(void)
+{
+	set_rs485de(0);
+}
+
+static void trab_rs485_disable_rx(void)
+{
+	set_rs485re(1);
+}
+#endif