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