Linux Kernel  3.7.1
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serial.h
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1 /*
2  * include/asm-alpha/serial.h
3  */
4 
5 
6 /*
7  * This assumes you have a 1.8432 MHz clock for your UART.
8  *
9  * It'd be nice if someone built a serial card with a 24.576 MHz
10  * clock, since the 16550A is capable of handling a top speed of 1.5
11  * megabits/second; but this requires the faster clock.
12  */
13 #define BASE_BAUD ( 1843200 / 16 )
14 
15 /* Standard COM flags (except for COM4, because of the 8514 problem) */
16 #ifdef CONFIG_SERIAL_DETECT_IRQ
17 #define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ)
18 #define STD_COM4_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_AUTO_IRQ)
19 #else
20 #define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
21 #define STD_COM4_FLAGS ASYNC_BOOT_AUTOCONF
22 #endif
23 
24 #define SERIAL_PORT_DFNS \
25  /* UART CLK PORT IRQ FLAGS */ \
26  { 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS }, /* ttyS0 */ \
27  { 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS }, /* ttyS1 */ \
28  { 0, BASE_BAUD, 0x3E8, 4, STD_COM_FLAGS }, /* ttyS2 */ \
29  { 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS }, /* ttyS3 */