release/src-rt-6.x/linux/linux-2.6/include/asm-ppc/pc_serial.h

   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 */