1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * include/asm-alpha/serial.h 4*4882a593Smuzhiyun */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* 8*4882a593Smuzhiyun * This assumes you have a 1.8432 MHz clock for your UART. 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * It'd be nice if someone built a serial card with a 24.576 MHz 11*4882a593Smuzhiyun * clock, since the 16550A is capable of handling a top speed of 1.5 12*4882a593Smuzhiyun * megabits/second; but this requires the faster clock. 13*4882a593Smuzhiyun */ 14*4882a593Smuzhiyun #define BASE_BAUD ( 1843200 / 16 ) 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* Standard COM flags (except for COM4, because of the 8514 problem) */ 17*4882a593Smuzhiyun #ifdef CONFIG_SERIAL_8250_DETECT_IRQ 18*4882a593Smuzhiyun #define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ) 19*4882a593Smuzhiyun #define STD_COM4_FLAGS (UPF_BOOT_AUTOCONF | UPF_AUTO_IRQ) 20*4882a593Smuzhiyun #else 21*4882a593Smuzhiyun #define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST) 22*4882a593Smuzhiyun #define STD_COM4_FLAGS UPF_BOOT_AUTOCONF 23*4882a593Smuzhiyun #endif 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun #define SERIAL_PORT_DFNS \ 26*4882a593Smuzhiyun /* UART CLK PORT IRQ FLAGS */ \ 27*4882a593Smuzhiyun { 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS }, /* ttyS0 */ \ 28*4882a593Smuzhiyun { 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS }, /* ttyS1 */ \ 29*4882a593Smuzhiyun { 0, BASE_BAUD, 0x3E8, 4, STD_COM_FLAGS }, /* ttyS2 */ \ 30*4882a593Smuzhiyun { 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS }, /* ttyS3 */ 31