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Diffstat (limited to 'board/bmw/ns16550.h')
| -rw-r--r-- | board/bmw/ns16550.h | 81 |
1 files changed, 81 insertions, 0 deletions
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); + |