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  1. /*
  2.  * Copyright (c) 2005 Ondrej Palkovsky
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup mips32 
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_mips32_SERIAL_H_
  36. #define KERN_mips32_SERIAL_H_
  37.  
  38. #include <console/chardev.h>
  39.  
  40. #define SERIAL_ADDRESS    0xB8000000
  41.  
  42. #define SERIAL_MAX        4
  43. #define SERIAL_COM1       0x3f8
  44. #define SERIAL_COM1_IRQ   4
  45. #define SERIAL_COM2       0x2f8
  46. #define SERIAL_COM2_IRQ   3
  47.  
  48. #define P_WRITEB(where, what)     (*((volatile char *) (SERIAL_ADDRESS + where)) = what)
  49. #define P_READB(where)            (*((volatile char *) (SERIAL_ADDRESS + where)))
  50.  
  51. #define SERIAL_READ(x)            P_READB(x)
  52. #define SERIAL_WRITE(x, c)        P_WRITEB(x, c)
  53.  
  54. /* Interrupt enable register */
  55. #define SERIAL_READ_IER(x)              (P_READB((x) + 1))
  56. #define SERIAL_WRITE_IER(x,c)           (P_WRITEB((x) + 1, c))
  57.  
  58. /* Interrupt identification register */
  59. #define SERIAL_READ_IIR(x)             (P_READB((x) + 2))
  60.  
  61. /* Line status register */
  62. #define SERIAL_READ_LSR(x)             (P_READB((x) + 5))
  63. #define TRANSMIT_EMPTY_BIT      5          
  64.  
  65. typedef struct {
  66.     int port;
  67.     int irq;
  68. }serial_t;
  69.  
  70. extern void serial_console(devno_t devno);
  71. extern int serial_init(void);
  72.  
  73. #endif
  74.  
  75. /** @}
  76.  */
  77.