serial.h

嵌入式系统设计与实验教材二源码linux内核移植与编译

/*
 * include/asm-parisc/serial.h
 */

#include <linux/config.h>
#include <asm/gsc.h>

/*
 * This assumes you have a 7.272727 MHz clock for your UART.
 * The documentation implies a 40Mhz clock, and elsewhere a 7Mhz clock
 * Clarified: 7.2727MHz on LASI. Not yet clarified for DINO
 */

#define LASI_BASE_BAUD ( 7272727 / 16 )
#define BASE_BAUD  LASI_BASE_BAUD

#ifdef CONFIG_SERIAL_DETECT_IRQ
#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ)
#define STD_COM4_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_AUTO_IRQ)
#else
#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
#define STD_COM4_FLAGS ASYNC_BOOT_AUTOCONF
#endif

#ifdef CONFIG_SERIAL_MANY_PORTS
#define FOURPORT_FLAGS ASYNC_FOURPORT
#define ACCENT_FLAGS 0
#define BOCA_FLAGS 0
#define HUB6_FLAGS 0
#define RS_TABLE_SIZE  64
#else
#define RS_TABLE_SIZE  4
#endif
	
/*
 *	The base is relative to the LASI base. We can fix that
 *	up later. We could also virtually map LASI so that we get
 *	nice constants all over our kernel...
 */
 
#define STD_SERIAL_PORT_DEFNS			\
	/* UART CLK   PORT IRQ     FLAGS        */			\
	{ 0, LASI_BASE_BAUD, -1, 4, ASYNC_SKIP_TEST, 0, PORT_UNKNOWN,}, /* ttyS0 */

#define SERIAL_PORT_DFNS		\
	STD_SERIAL_PORT_DEFNS