18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * include/asm-m68k/serial.h 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * currently this seems useful only for a Q40, 68c2ecf20Sopenharmony_ci * it's an almost exact copy of ../asm-alpha/serial.h 78c2ecf20Sopenharmony_ci * 88c2ecf20Sopenharmony_ci */ 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ci 118c2ecf20Sopenharmony_ci/* 128c2ecf20Sopenharmony_ci * This assumes you have a 1.8432 MHz clock for your UART. 138c2ecf20Sopenharmony_ci * 148c2ecf20Sopenharmony_ci * It'd be nice if someone built a serial card with a 24.576 MHz 158c2ecf20Sopenharmony_ci * clock, since the 16550A is capable of handling a top speed of 1.5 168c2ecf20Sopenharmony_ci * megabits/second; but this requires the faster clock. 178c2ecf20Sopenharmony_ci */ 188c2ecf20Sopenharmony_ci#define BASE_BAUD ( 1843200 / 16 ) 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ci/* Standard COM flags (except for COM4, because of the 8514 problem) */ 218c2ecf20Sopenharmony_ci#ifdef CONFIG_SERIAL_8250_DETECT_IRQ 228c2ecf20Sopenharmony_ci#define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ) 238c2ecf20Sopenharmony_ci#define STD_COM4_FLAGS (UPF_BOOT_AUTOCONF | UPF_AUTO_IRQ) 248c2ecf20Sopenharmony_ci#else 258c2ecf20Sopenharmony_ci#define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST) 268c2ecf20Sopenharmony_ci#define STD_COM4_FLAGS UPF_BOOT_AUTOCONF 278c2ecf20Sopenharmony_ci#endif 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_ci#ifdef CONFIG_ISA 308c2ecf20Sopenharmony_ci#define SERIAL_PORT_DFNS \ 318c2ecf20Sopenharmony_ci /* UART CLK PORT IRQ FLAGS */ \ 328c2ecf20Sopenharmony_ci { 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS }, /* ttyS0 */ \ 338c2ecf20Sopenharmony_ci { 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS }, /* ttyS1 */ \ 348c2ecf20Sopenharmony_ci { 0, BASE_BAUD, 0x3E8, 4, STD_COM_FLAGS }, /* ttyS2 */ \ 358c2ecf20Sopenharmony_ci { 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS }, /* ttyS3 */ 368c2ecf20Sopenharmony_ci#endif 37