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