diff options
Diffstat (limited to 'board/cogent/serial.h')
| -rw-r--r-- | board/cogent/serial.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/board/cogent/serial.h b/board/cogent/serial.h new file mode 100644 index 0000000..89962d8 --- /dev/null +++ b/board/cogent/serial.h @@ -0,0 +1,15 @@ +/* Line Status Register bits */ +#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 */ + +#define CLKRATE 3686400 /* cogent motherboard serial clk = 3.6864MHz */ +#define DEFDIV 1 /* default to 230400 bps */ + +#define br_to_div(br) (CLKRATE / (16 * (br))) +#define div_to_br(div) (CLKRATE / (16 * (div))) |