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  1. /*
  2.  * Copyright (c) 2001-2004 Jakub Jermar
  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 genarch
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief   Headers for NS 16550 serial port / keyboard driver.
  35.  */
  36.  
  37. #ifndef KERN_NS16550_H_
  38. #define KERN_NS16550_H_
  39.  
  40. #include <console/chardev.h>
  41. #include <ipc/irq.h>
  42.  
  43. extern void ns16550_init(devno_t devno, inr_t inr, uintptr_t vaddr);
  44. extern void ns16550_poll(void);
  45. extern void ns16550_grab(void);
  46. extern void ns16550_release(void);
  47. extern char ns16550_key_read(chardev_t *d);
  48. extern irq_ownership_t ns16550_claim(void);
  49. extern void ns16550_irq_handler(irq_t *irq, void *arg, ...);
  50.  
  51. #include <arch/types.h>
  52. #ifndef ia64
  53. #include <arch/drivers/kbd.h>
  54. #endif
  55. /* NS16550 registers */
  56. #define RBR_REG     0   /** Receiver Buffer Register. */
  57. #define IER_REG     1   /** Interrupt Enable Register. */
  58. #define IIR_REG     2   /** Interrupt Ident Register (read). */
  59. #define FCR_REG     2   /** FIFO control register (write). */
  60. #define LCR_REG     3   /** Line Control register. */
  61. #define LSR_REG     5   /** Line Status Register. */
  62.  
  63. #define IER_ERBFI   0x01    /** Enable Receive Buffer Full Interrupt. */
  64.  
  65. #define LCR_DLAB    0x80    /** Divisor Latch Access bit. */
  66.  
  67. /** Structure representing the ns16550 device. */
  68. typedef struct {
  69.     devno_t devno;
  70.     volatile ioport_t io_port;  /** Memory mapped registers of the ns16550. */
  71. } ns16550_t;
  72.  
  73. static inline uint8_t ns16550_rbr_read(ns16550_t *dev)
  74. {
  75.     return inb(dev->io_port+RBR_REG);
  76. }
  77. static inline void ns16550_rbr_write(ns16550_t *dev, uint8_t v)
  78. {
  79.     outb(dev->io_port+RBR_REG,v);
  80. }
  81.  
  82. static inline uint8_t ns16550_ier_read(ns16550_t *dev)
  83. {
  84.     return inb(dev->io_port+IER_REG);
  85. }
  86.  
  87. static inline void ns16550_ier_write(ns16550_t *dev, uint8_t v)
  88. {
  89.     outb(dev->io_port+IER_REG,v);
  90. }
  91.  
  92. static inline uint8_t ns16550_iir_read(ns16550_t *dev)
  93. {
  94.     return inb(dev->io_port+IIR_REG);
  95. }
  96.  
  97. static inline void ns16550_fcr_write(ns16550_t *dev, uint8_t v)
  98. {
  99.     outb(dev->io_port+FCR_REG,v);
  100. }
  101.  
  102. static inline uint8_t ns16550_lcr_read(ns16550_t *dev)
  103. {
  104.     return inb(dev->io_port+LCR_REG);
  105. }
  106.  
  107. static inline void ns16550_lcr_write(ns16550_t *dev, uint8_t v)
  108. {
  109.     outb(dev->io_port+LCR_REG,v);
  110. }
  111.  
  112. static inline uint8_t ns16550_lsr_read(ns16550_t *dev)
  113. {
  114.     return inb(dev->io_port+LSR_REG);
  115. }
  116.  
  117.  
  118.  
  119. #endif
  120.  
  121. /** @}
  122.  */
  123.