[U-Boot-Users] [PATCH 08/08]: tsi108 serial port support
Zang Roy-r61911
tie-fei.zang at freescale.com
Fri Jul 28 11:53:54 CEST 2006
tsi108 serial port support.
Signed-off-by: Alexandre Bounine <alexandreb at tundra.com>
Signed-off-by: Roy Zang <tie-fei.zang at freescale.com>
>From 9600fae3923ce41269eb273116ad6080847512bc Mon Sep 17 00:00:00 2001
From: roy zang <tie-fei.zang at freescale.com>
Date: Fri, 28 Jul 2006 15:33:02 +0800
Subject: [PATCH] tsi108 serial port support
---
board/mpc7448hpc2/ns16550.c | 77 ++++++++++++++++++++++++++++++++++
board/mpc7448hpc2/ns16550.h | 98
+++++++++++++++++++++++++++++++++++++++++++
board/mpc7448hpc2/serial.c | 117
++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 292 insertions(+), 0 deletions(-)
diff --git a/board/mpc7448hpc2/ns16550.c b/board/mpc7448hpc2/ns16550.c
new file mode 100644
index 0000000..47e01f7
--- /dev/null
+++ b/board/mpc7448hpc2/ns16550.c
@@ -0,0 +1,77 @@
+/*
+ * 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
+
*-----------------------------------------------------------------------
--
+ * COM1 NS16550 support
+ * originally from linux source (arch/ppc/boot/ns16550.c)
+ * modified to use CFG_ISA_MEM and new defines
+ *
+ * further modified by Josh Huber <huber at mclx.com> to support
+ * the DUART on the Galileo Eval board. (db64360)
+ */
+
+#include <config.h>
+#include "ns16550.h"
+
+const NS16550_t COM_PORTS[] = { (NS16550_t) (CFG_DUART_IO + 0),
+ (NS16550_t) (CFG_DUART_IO + 0x400)
+};
+
+volatile struct NS16550 *NS16550_init(int chan, int baud_divisor)
+{
+ volatile struct NS16550 *com_port;
+
+ com_port = (struct NS16550 *)COM_PORTS[chan];
+ com_port->ier = 0x00;
+ com_port->lcr = LCR_BKSE; /* Access baud rate */
+ com_port->dll = baud_divisor & 0xff; /* 9600 baud */
+ com_port->dlm = (baud_divisor >> 8) & 0xff;
+ com_port->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */
+ com_port->mcr = MCR_DTR | MCR_RTS; /* RTS/DTR */
+
+ /* Clear & enable FIFOs */
+ com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR;
+ return (com_port);
+}
+
+void NS16550_reinit(volatile struct NS16550 *com_port, int
baud_divisor)
+{
+ com_port->ier = 0x00;
+ com_port->lcr = LCR_BKSE; /* Access baud rate */
+ com_port->dll = baud_divisor & 0xff; /* 9600 baud */
+ com_port->dlm = (baud_divisor >> 8) & 0xff;
+ com_port->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */
+ com_port->mcr = MCR_DTR | MCR_RTS; /* RTS/DTR */
+
+ /* Clear & enable FIFOs */
+ com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR;
+}
+
+void NS16550_putc(volatile struct NS16550 *com_port, unsigned char c)
+{
+ while ((com_port->lsr & LSR_THRE) == 0) ;
+ com_port->thr = c;
+}
+
+unsigned char NS16550_getc(volatile struct NS16550 *com_port)
+{
+ while ((com_port->lsr & LSR_DR) == 0) ;
+ return (com_port->rbr);
+}
+
+int NS16550_tstc(volatile struct NS16550 *com_port)
+{
+ return ((com_port->lsr & LSR_DR) != 0);
+}
diff --git a/board/mpc7448hpc2/ns16550.h b/board/mpc7448hpc2/ns16550.h
new file mode 100644
index 0000000..f80cde5
--- /dev/null
+++ b/board/mpc7448hpc2/ns16550.h
@@ -0,0 +1,98 @@
+/*
+ * 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
+
*-----------------------------------------------------------------------
--
+ * NS16550 Serial Port
+ * originally from linux source (arch/ppc/boot/ns16550.h)
+ * modified slightly to
+ * have addresses as offsets from CFG_ISA_BASE
+ * added a few more definitions
+ * added prototypes for ns16550.c
+ * reduced no of com ports to 2
+ * modifications (c) Rob Taylor, Flying Pig Systems. 2000.
+ *
+ * further modified to support the DUART in the Galileo eval board
+ * modifications (c) Josh Huber <huber at mclx.com>, Mission Critical
Linux, Inc.
+ */
+
+#ifndef __NS16550_H__
+#define __NS16550_H__
+
+/* the padding is necessary because on the galileo board the UART is
+ wired in with the 3 address lines shifted over by 2 bits */
+struct NS16550 {
+ unsigned char rbr; /* 0 = 0-3 */
+ unsigned char ier; /* 1 = 4-7 */
+ unsigned char fcr; /* 2 = 8-b */
+ unsigned char lcr; /* 3 = c-f */
+ unsigned char mcr; /* 4 = 10-13 */
+ unsigned char lsr; /* 5 = 14-17 */
+ unsigned char msr; /* 6 =18-1b */
+ unsigned char scr; /* 7 =1c-1f */
+} __attribute__ ((packed));
+
+/* aliases */
+#define thr rbr
+#define iir fcr
+#define dll rbr
+#define dlm ier
+
+#define FCR_FIFO_EN 0x01 /*fifo enable */
+#define FCR_RXSR 0x02 /*reciever soft reset */
+#define FCR_TXSR 0x04 /*transmitter soft reset */
+
+#define MCR_DTR 0x01
+#define MCR_RTS 0x02
+#define MCR_DMA_EN 0x04
+#define MCR_TX_DFR 0x08
+
+#define LCR_WLS_MSK 0x03 /* character length slect mask */
+#define LCR_WLS_5 0x00 /* 5 bit character length */
+#define LCR_WLS_6 0x01 /* 6 bit character length */
+#define LCR_WLS_7 0x02 /* 7 bit character length */
+#define LCR_WLS_8 0x03 /* 8 bit character length */
+#define LCR_STB 0x04 /* Number of stop Bits, off = 1, on =
1.5 or 2) */
+#define LCR_PEN 0x08 /* Parity eneble */
+#define LCR_EPS 0x10 /* Even Parity Select */
+#define LCR_STKP 0x20 /* Stick Parity */
+#define LCR_SBRK 0x40 /* Set Break */
+#define LCR_BKSE 0x80 /* Bank select enable */
+
+#define LSR_DR 0x01 /* Data ready */
+#define LSR_OE 0x02 /* Overrun */
+#define LSR_PE 0x04 /* Parity error */
+#define LSR_FE 0x08 /* Framing error */
+#define LSR_BI 0x10 /* Break */
+#define LSR_THRE 0x20 /* Xmit holding register empty */
+#define LSR_TEMT 0x40 /* Xmitter empty */
+#define LSR_ERR 0x80 /* Error */
+
+/* useful defaults for LCR */
+#define LCR_8N1 0x03
+
+#define COM1 0x03F8
+#define COM2 0x02F8
+
+volatile struct NS16550 *NS16550_init(int chan, int baud_divisor);
+void NS16550_putc(volatile struct NS16550 *com_port, unsigned char c);
+unsigned char NS16550_getc(volatile struct NS16550 *com_port);
+int NS16550_tstc(volatile struct NS16550 *com_port);
+void NS16550_reinit(volatile struct NS16550 *com_port, int
baud_divisor);
+
+typedef struct NS16550 *NS16550_t;
+
+extern const NS16550_t COM_PORTS[];
+
+#endif
diff --git a/board/mpc7448hpc2/serial.c b/board/mpc7448hpc2/serial.c
new file mode 100644
index 0000000..b13a536
--- /dev/null
+++ b/board/mpc7448hpc2/serial.c
@@ -0,0 +1,117 @@
+/*
+ * (C) Copyright 2001
+ * Josh Huber <huber at mclx.com>, Mission Critical Linux, Inc.
+ *
+ * modified for marvell db64360 eval board by
+ * Ingo Assmus <ingo.assmus at keymile.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+
+/*
+ * serial.c - serial support for the Tsi108 mpc7448hpc2 board
+ */
+
+/* supports both the 16650 duart and the MPSC */
+
+#include <common.h>
+#include <command.h>
+#include "serial.h"
+
+#include "ns16550.h"
+
+int serial_init(void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ int clock_divisor = (CFG_OCN_CLK / 2) / gd->baudrate;
+
+#ifdef CFG_INIT_CHAN1
+ (void)NS16550_init(0, clock_divisor);
+#endif
+#ifdef CFG_INIT_CHAN2
+ (void)NS16550_init(1, clock_divisor);
+#endif
+ return (0);
+}
+
+void serial_putc(const char c)
+{
+ if (c == '\n')
+ NS16550_putc(COM_PORTS[CFG_DUART_CHAN], '\r');
+
+ NS16550_putc(COM_PORTS[CFG_DUART_CHAN], c);
+}
+
+int serial_getc(void)
+{
+ return NS16550_getc(COM_PORTS[CFG_DUART_CHAN]);
+}
+
+int serial_tstc(void)
+{
+ return NS16550_tstc(COM_PORTS[CFG_DUART_CHAN]);
+}
+
+void serial_setbrg(void)
+{
+ DECLARE_GLOBAL_DATA_PTR;
+
+ int clock_divisor = 230400 / gd->baudrate;
+
+#ifdef CFG_INIT_CHAN1
+ NS16550_reinit(COM_PORTS[0], clock_divisor);
+#endif
+#ifdef CFG_INIT_CHAN2
+ NS16550_reinit(COM_PORTS[1], clock_divisor);
+#endif
+}
+
+void serial_puts(const char *s)
+{
+ while (*s) {
+ serial_putc(*s++);
+ }
+}
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+void kgdb_serial_init(void)
+{
+}
+
+void putDebugChar(int c)
+{
+ serial_putc(c);
+}
+
+void putDebugStr(const char *str)
+{
+ serial_puts(str);
+}
+
+int getDebugChar(void)
+{
+ return serial_getc();
+}
+
+void kgdb_interruptible(int yes)
+{
+ return;
+}
+#endif /* CFG_CMD_KGDB */
--
1.4.0
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