tsi108 serial port support.
Signed-off-by: Alexandre Bounine alexandreb@tundra.com Signed-off-by: Roy Zang tie-fei.zang@freescale.com
From 9600fae3923ce41269eb273116ad6080847512bc Mon Sep 17 00:00:00 2001
From: roy zang tie-fei.zang@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@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@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@mclx.com, Mission Critical Linux, Inc. + * + * modified for marvell db64360 eval board by + * Ingo Assmus ingo.assmus@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 */