From 4c3b21a5f915988e3d9681cf9cb566bb7bd56859 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Fri, 23 May 2003 12:36:20 +0000
Subject: Patch by Kyle Harris, 20 May 2003: In preparation for an ixp port,
 rename cpu/xscale and arch-xscale into cpu/pxa and arch-pxa.

---
 cpu/pxa/serial.c | 166 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100644 cpu/pxa/serial.c

(limited to 'cpu/pxa/serial.c')

diff --git a/cpu/pxa/serial.c b/cpu/pxa/serial.c
new file mode 100644
index 0000000000..c9d5f70bc4
--- /dev/null
+++ b/cpu/pxa/serial.c
@@ -0,0 +1,166 @@
+/*
+ * (C) Copyright 2002
+ * 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
+ *
+ */
+
+#include <common.h>
+#include <asm/arch/pxa-regs.h>
+
+void serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	unsigned int quot = 0;
+
+	if (gd->baudrate == 1200)
+		quot = 192;
+	else if (gd->baudrate == 9600)
+		quot = 96;
+	else if (gd->baudrate == 19200)
+		quot = 48;
+	else if (gd->baudrate == 38400)
+		quot = 24;
+	else if (gd->baudrate == 57600)
+		quot = 16;
+	else if (gd->baudrate == 115200)
+		quot = 8;
+	else
+		hang ();
+
+#ifdef CONFIG_FFUART
+
+	CKEN |= CKEN6_FFUART;
+
+	FFIER = 0;					/* Disable for now */
+	FFFCR = 0;					/* No fifos enabled */
+
+	/* set baud rate */
+	FFLCR = LCR_WLS0 | LCR_WLS1 | LCR_DLAB;
+	FFDLL = quot & 0xff;
+	FFDLH = quot >> 8;
+	FFLCR = LCR_WLS0 | LCR_WLS1;
+
+	FFIER = IER_UUE;			/* Enable FFUART */
+
+#elif defined(CONFIG_BTUART)
+	CKEN |= CKEN7_BTUART;
+
+	BTIER = 0;
+	BTFCR = 0;
+
+	/* set baud rate */
+	BTLCR = LCR_DLAB;
+	BTDLL = quot & 0xff;
+	BTDLH = quot >> 8;
+	BTLCR = LCR_WLS0 | LCR_WLS1;
+
+	BTIER = IER_UUE;			/* Enable BFUART */
+
+#elif defined(CONFIG_STUART)
+#error "Bad: not implemented yet!"
+#else
+#error "Bad: you didn't configured serial ..."
+#endif
+}
+
+
+/*
+ * Initialise the serial port with the given baudrate. The settings
+ * are always 8 data bits, no parity, 1 stop bit, no start bits.
+ *
+ */
+int serial_init (void)
+{
+	serial_setbrg ();
+
+	return (0);
+}
+
+
+/*
+ * Output a single byte to the serial port.
+ */
+void serial_putc (const char c)
+{
+#ifdef CONFIG_FFUART
+	/* wait for room in the tx FIFO on FFUART */
+	while ((FFLSR & LSR_TEMT) == 0);
+
+	FFTHR = c;
+#elif defined(CONFIG_BTUART)
+	while ((BTLSR & LSR_TEMT ) == 0 );
+	BTTHR = c;
+#elif defined(CONFIG_STUART)
+#endif
+
+	/* If \n, also do \r */
+	if (c == '\n')
+		serial_putc ('\r');
+}
+
+/*
+ * 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_tstc (void)
+{
+#ifdef CONFIG_FFUART
+	return FFLSR & LSR_DR;
+#elif defined(CONFIG_BTUART)
+	return BTLSR & LSR_DR;
+#elif defined(CONFIG_STUART)
+#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 (void)
+{
+#ifdef CONFIG_FFUART
+	while (!(FFLSR & LSR_DR));
+
+	return (char) FFRBR & 0xff;
+#elif defined(CONFIG_BTUART)
+	while (!(BTLSR & LSR_DR));
+
+	return (char) BTRBR & 0xff;
+#elif defined(CONFIG_STUART)
+#endif
+}
+
+void
+serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
-- 
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