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kernel/linux-rt-4.4.41/arch/x86/include/asm/serial.h 1.07 KB
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  #ifndef _ASM_X86_SERIAL_H
  #define _ASM_X86_SERIAL_H
  
  /*
   * This assumes you have a 1.8432 MHz clock for your UART.
   *
   * It'd be nice if someone built a serial card with a 24.576 MHz
   * clock, since the 16550A is capable of handling a top speed of 1.5
   * megabits/second; but this requires a faster clock.
   */
  #define BASE_BAUD (1843200/16)
  
  /* Standard COM flags (except for COM4, because of the 8514 problem) */
  #ifdef CONFIG_SERIAL_8250_DETECT_IRQ
  # define STD_COMX_FLAGS	(UPF_BOOT_AUTOCONF |	UPF_SKIP_TEST	| UPF_AUTO_IRQ)
  # define STD_COM4_FLAGS	(UPF_BOOT_AUTOCONF |	0		| UPF_AUTO_IRQ)
  #else
  # define STD_COMX_FLAGS	(UPF_BOOT_AUTOCONF |	UPF_SKIP_TEST	| 0		)
  # define STD_COM4_FLAGS	(UPF_BOOT_AUTOCONF |	0		| 0		)
  #endif
  
  #define SERIAL_PORT_DFNS								\
  	/* UART		CLK		PORT	IRQ	FLAGS			    */	\
  	{ .uart = 0,	BASE_BAUD,	0x3F8,	4,	STD_COMX_FLAGS	}, /* ttyS0 */	\
  	{ .uart = 0,	BASE_BAUD,	0x2F8,	3,	STD_COMX_FLAGS	}, /* ttyS1 */	\
  	{ .uart = 0,	BASE_BAUD,	0x3E8,	4,	STD_COMX_FLAGS	}, /* ttyS2 */	\
  	{ .uart = 0,	BASE_BAUD,	0x2E8,	3,	STD_COM4_FLAGS	}, /* ttyS3 */
  
  #endif /* _ASM_X86_SERIAL_H */