18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef _ASM_X86_SERIAL_H 38c2ecf20Sopenharmony_ci#define _ASM_X86_SERIAL_H 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci/* 68c2ecf20Sopenharmony_ci * This assumes you have a 1.8432 MHz clock for your UART. 78c2ecf20Sopenharmony_ci * 88c2ecf20Sopenharmony_ci * It'd be nice if someone built a serial card with a 24.576 MHz 98c2ecf20Sopenharmony_ci * clock, since the 16550A is capable of handling a top speed of 1.5 108c2ecf20Sopenharmony_ci * megabits/second; but this requires a faster clock. 118c2ecf20Sopenharmony_ci */ 128c2ecf20Sopenharmony_ci#define BASE_BAUD (1843200/16) 138c2ecf20Sopenharmony_ci 148c2ecf20Sopenharmony_ci/* Standard COM flags (except for COM4, because of the 8514 problem) */ 158c2ecf20Sopenharmony_ci#ifdef CONFIG_SERIAL_8250_DETECT_IRQ 168c2ecf20Sopenharmony_ci# define STD_COMX_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ) 178c2ecf20Sopenharmony_ci# define STD_COM4_FLAGS (UPF_BOOT_AUTOCONF | 0 | UPF_AUTO_IRQ) 188c2ecf20Sopenharmony_ci#else 198c2ecf20Sopenharmony_ci# define STD_COMX_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | 0 ) 208c2ecf20Sopenharmony_ci# define STD_COM4_FLAGS (UPF_BOOT_AUTOCONF | 0 | 0 ) 218c2ecf20Sopenharmony_ci#endif 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ci#define SERIAL_PORT_DFNS \ 248c2ecf20Sopenharmony_ci /* UART CLK PORT IRQ FLAGS */ \ 258c2ecf20Sopenharmony_ci { .uart = 0, BASE_BAUD, 0x3F8, 4, STD_COMX_FLAGS }, /* ttyS0 */ \ 268c2ecf20Sopenharmony_ci { .uart = 0, BASE_BAUD, 0x2F8, 3, STD_COMX_FLAGS }, /* ttyS1 */ \ 278c2ecf20Sopenharmony_ci { .uart = 0, BASE_BAUD, 0x3E8, 4, STD_COMX_FLAGS }, /* ttyS2 */ \ 288c2ecf20Sopenharmony_ci { .uart = 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS }, /* ttyS3 */ 298c2ecf20Sopenharmony_ci 308c2ecf20Sopenharmony_ci#endif /* _ASM_X86_SERIAL_H */ 31