diff options
Diffstat (limited to 'board/bmw')
| -rw-r--r-- | board/bmw/m48t59y.h | 57 | ||||
| -rw-r--r-- | board/bmw/ns16550.c | 60 | ||||
| -rw-r--r-- | board/bmw/ns16550.h | 81 |
3 files changed, 198 insertions, 0 deletions
diff --git a/board/bmw/m48t59y.h b/board/bmw/m48t59y.h new file mode 100644 index 0000000..717300d --- /dev/null +++ b/board/bmw/m48t59y.h @@ -0,0 +1,57 @@ +/* + * SGS M48-T59Y TOD/NVRAM Driver + * + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 1999, by Curt McDowell, 08-06-99, Broadcom Corp. + * + * (C) Copyright 2001, James Dougherty, 07/18/01, Broadcom Corp. + * + * 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 + */ + +#ifndef __M48_T59_Y_H +#define __M48_T59_Y_H + +/* + * M48 T59Y -Timekeeping Battery backed SRAM. + */ + +int m48_tod_init(void); + +int m48_tod_set(int year, + int month, + int day, + int hour, + int minute, + int second); + +int m48_tod_get(int *year, + int *month, + int *day, + int *hour, + int *minute, + int *second); + +int m48_tod_get_second(void); + +void m48_watchdog_arm(int usec); + +#endif /*!__M48_T59_Y_H */ diff --git a/board/bmw/ns16550.c b/board/bmw/ns16550.c new file mode 100644 index 0000000..b6b6f4c --- /dev/null +++ b/board/bmw/ns16550.c @@ -0,0 +1,60 @@ +/* + * COM1 NS16550 support + * originally from linux source (arch/ppc/boot/ns16550.c) + * modified to use CFG_ISA_MEM and new defines + */ + +#include <config.h> +#include "ns16550.h" + +typedef struct NS16550 *NS16550_t; + +const NS16550_t COM_PORTS[] = { (NS16550_t) ((CFG_EUMB_ADDR) + 0x4500), (NS16550_t) ((CFG_EUMB_ADDR) + 0x4600)}; + +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_RTS; /* RTS/DTR */ + com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR; /* Clear & enable FIFOs */ +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_RTS; /* RTS/DTR */ + com_port->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR; /* Clear & enable FIFOs */ +} + +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/bmw/ns16550.h b/board/bmw/ns16550.h new file mode 100644 index 0000000..b80ac02 --- /dev/null +++ b/board/bmw/ns16550.h @@ -0,0 +1,81 @@ +/* + * 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 8245 duart + * modifications (c) Paul Jimenez, Musenki, Inc. 2001. + */ + + +struct NS16550 + { + unsigned char rbrthrdlb; /* 0 */ + unsigned char ierdmb; /* 1 */ + unsigned char iirfcrafr; /* 2 */ + unsigned char lcr; /* 3 */ + unsigned char mcr; /* 4 */ + unsigned char lsr; /* 5 */ + unsigned char msr; /* 6 */ + unsigned char scr; /* 7 */ + unsigned char reserved[2]; /* 8 & 9 */ + unsigned char dsr; /* 10 */ + unsigned char dcr; /* 11 */ + }; + + +#define rbr rbrthrdlb +#define thr rbrthrdlb +#define dll rbrthrdlb +#define ier ierdmb +#define dlm ierdmb +#define iir iirfcrafr +#define fcr iirfcrafr +#define afr iirfcrafr + +#define FCR_FIFO_EN 0x01 /*fifo enable*/ +#define FCR_RXSR 0x02 /*reciever soft reset*/ +#define FCR_TXSR 0x04 /*transmitter soft reset*/ +#define FCR_DMS 0x08 /* DMA Mode Select */ + +#define MCR_RTS 0x02 /* Readyu to Send */ +#define MCR_LOOP 0x10 /* Local loopback mode enable */ +/* #define MCR_DTR 0x01 noton 8245 duart */ +/* #define MCR_DMA_EN 0x04 noton 8245 duart */ +/* #define MCR_TX_DFR 0x08 noton 8245 duart */ + +#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 - aka DLAB on 8245 */ + +#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 + + +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); + |