3 * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
5 * modified for marvell db64360 eval board by
6 * Ingo Assmus <ingo.assmus@keymile.com>
8 * SPDX-License-Identifier: GPL-2.0+
11 /* serial.h - mostly useful for DUART serial_init in serial.c */
31 #define BDEFAULT B115200
33 /* this stuff is important to initialize
36 #define Scale 0x01L /* distance between port addresses */
37 #define COM1 0x000003f8 /* Keyboard */
38 #define COM2 0x000002f8 /* Host */
41 /* Port Definitions relative to base COM port addresses */
42 #define DataIn (0x00*Scale) /* data input port */
43 #define DataOut (0x00*Scale) /* data output port */
44 #define BaudLsb (0x00*Scale) /* baud rate divisor least significant byte */
45 #define BaudMsb (0x01*Scale) /* baud rate divisor most significant byte */
46 #define Ier (0x01*Scale) /* interrupt enable register */
47 #define Iir (0x02*Scale) /* interrupt identification register */
48 #define Lcr (0x03*Scale) /* line control register */
49 #define Mcr (0x04*Scale) /* modem control register */
50 #define Lsr (0x05*Scale) /* line status register */
51 #define Msr (0x06*Scale) /* modem status register */
53 /* Bit Definitions for above ports */
54 #define LcrDlab 0x80 /* b7: enable baud rate divisor registers */
55 #define LcrDflt 0x03 /* b6-0: no parity, 1 stop, 8 data */
57 #define McrRts 0x02 /* b1: request to send (I am ready to xmit) */
58 #define McrDtr 0x01 /* b0: data terminal ready (I am alive ready to rcv) */
59 #define McrDflt (McrRts|McrDtr)
61 #define LsrTxD 0x6000 /* b5: transmit holding register empty (i.e. xmit OK!)*/
62 /* b6: transmitter empty */
63 #define LsrRxD 0x0100 /* b0: received data ready (i.e. got a byte!) */
65 #define MsrRi 0x0040 /* b6: ring indicator (other guy is ready to rcv) */
66 #define MsrDsr 0x0020 /* b5: data set ready (other guy is alive ready to rcv */
67 #define MsrCts 0x0010 /* b4: clear to send (other guy is ready to rcv) */
69 #define IerRda 0xf /* b0: Enable received data available interrupt */
73 #endif /* __SERIAL_H__ */