1/* 2 * include/asm-ppc/pc_serial.h 3 * 4 * This is basically a copy of include/asm-i386/serial.h. 5 * It is used on platforms which have an ISA bus and thus are likely 6 * to have PC-style serial ports at the legacy I/O port addresses. 7 * It also includes the definitions for the fourport, accent, boca 8 * and hub6 multiport serial cards, although I have never heard of 9 * anyone using any of those on a PPC platform. -- paulus 10 */ 11 12 13/* 14 * This assumes you have a 1.8432 MHz clock for your UART. 15 * 16 * It'd be nice if someone built a serial card with a 24.576 MHz 17 * clock, since the 16550A is capable of handling a top speed of 1.5 18 * megabits/second; but this requires the faster clock. 19 */ 20#define BASE_BAUD ( 1843200 / 16 ) 21 22#ifdef CONFIG_SERIAL_MANY_PORTS 23#define RS_TABLE_SIZE 64 24#else 25#define RS_TABLE_SIZE 4 26#endif 27 28/* Standard COM flags (except for COM4, because of the 8514 problem) */ 29#ifdef CONFIG_SERIAL_DETECT_IRQ 30#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ) 31#define STD_COM4_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_AUTO_IRQ) 32#else 33#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST) 34#define STD_COM4_FLAGS ASYNC_BOOT_AUTOCONF 35#endif 36 37#define SERIAL_PORT_DFNS \ 38 /* UART CLK PORT IRQ FLAGS */ \ 39 { 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS }, /* ttyS0 */ \ 40 { 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS }, /* ttyS1 */ \ 41 { 0, BASE_BAUD, 0x3E8, 4, STD_COM_FLAGS }, /* ttyS2 */ \ 42 { 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS }, /* ttyS3 */ 43