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