1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * include/asm-m68k/serial.h
4 *
5 * currently this seems useful only for a Q40,
6 * it's an almost exact copy of ../asm-alpha/serial.h
7 *
8 */
9
10
11/*
12 * This assumes you have a 1.8432 MHz clock for your UART.
13 *
14 * It'd be nice if someone built a serial card with a 24.576 MHz
15 * clock, since the 16550A is capable of handling a top speed of 1.5
16 * megabits/second; but this requires the faster clock.
17 */
18#define BASE_BAUD ( 1843200 / 16 )
19
20/* Standard COM flags (except for COM4, because of the 8514 problem) */
21#ifdef CONFIG_SERIAL_8250_DETECT_IRQ
22#define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ)
23#define STD_COM4_FLAGS (UPF_BOOT_AUTOCONF | UPF_AUTO_IRQ)
24#else
25#define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST)
26#define STD_COM4_FLAGS UPF_BOOT_AUTOCONF
27#endif
28
29#ifdef CONFIG_ISA
30#define SERIAL_PORT_DFNS			\
31	/* UART CLK   PORT IRQ     FLAGS        */			\
32	{ 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS },	/* ttyS0 */	\
33	{ 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS },	/* ttyS1 */	\
34	{ 0, BASE_BAUD, 0x3E8, 4, STD_COM_FLAGS },	/* ttyS2 */	\
35	{ 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS },	/* ttyS3 */
36#endif
37