162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef _ASM_X86_SERIAL_H 362306a36Sopenharmony_ci#define _ASM_X86_SERIAL_H 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci/* 662306a36Sopenharmony_ci * This assumes you have a 1.8432 MHz clock for your UART. 762306a36Sopenharmony_ci * 862306a36Sopenharmony_ci * It'd be nice if someone built a serial card with a 24.576 MHz 962306a36Sopenharmony_ci * clock, since the 16550A is capable of handling a top speed of 1.5 1062306a36Sopenharmony_ci * megabits/second; but this requires a faster clock. 1162306a36Sopenharmony_ci */ 1262306a36Sopenharmony_ci#define BASE_BAUD (1843200/16) 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci/* Standard COM flags (except for COM4, because of the 8514 problem) */ 1562306a36Sopenharmony_ci#ifdef CONFIG_SERIAL_8250_DETECT_IRQ 1662306a36Sopenharmony_ci# define STD_COMX_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ) 1762306a36Sopenharmony_ci# define STD_COM4_FLAGS (UPF_BOOT_AUTOCONF | 0 | UPF_AUTO_IRQ) 1862306a36Sopenharmony_ci#else 1962306a36Sopenharmony_ci# define STD_COMX_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | 0 ) 2062306a36Sopenharmony_ci# define STD_COM4_FLAGS (UPF_BOOT_AUTOCONF | 0 | 0 ) 2162306a36Sopenharmony_ci#endif 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci#define SERIAL_PORT_DFNS \ 2462306a36Sopenharmony_ci /* UART CLK PORT IRQ FLAGS */ \ 2562306a36Sopenharmony_ci { .uart = 0, BASE_BAUD, 0x3F8, 4, STD_COMX_FLAGS }, /* ttyS0 */ \ 2662306a36Sopenharmony_ci { .uart = 0, BASE_BAUD, 0x2F8, 3, STD_COMX_FLAGS }, /* ttyS1 */ \ 2762306a36Sopenharmony_ci { .uart = 0, BASE_BAUD, 0x3E8, 4, STD_COMX_FLAGS }, /* ttyS2 */ \ 2862306a36Sopenharmony_ci { .uart = 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS }, /* ttyS3 */ 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci#endif /* _ASM_X86_SERIAL_H */ 31