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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. #include <interrupt.h>
  36. #include <console/chardev.h>
  37. #include <arch/drivers/msim.h>
  38. #include <arch/cp0.h>
  39. #include <console/console.h>
  40. #include <ddi/irq.h>
  41. #include <sysinfo/sysinfo.h>
  42.  
  43. /** Address of devices. */
  44. #define MSIM_VIDEORAM       0xB0000000
  45. #define MSIM_KBD_ADDRESS    0xB0000000
  46. #define MSIM_KBD_IRQ        2
  47.  
  48. static chardev_t console;
  49. static irq_t msim_irq;
  50.  
  51. static void msim_write(chardev_t *dev, const char ch);
  52. static void msim_enable(chardev_t *dev);
  53. static void msim_disable(chardev_t *dev);
  54. static char msim_do_read(chardev_t *dev);
  55.  
  56. static chardev_operations_t msim_ops = {
  57.     .resume = msim_enable,
  58.     .suspend = msim_disable,
  59.     .write = msim_write,
  60.     .read = msim_do_read,
  61. };
  62.  
  63. /** Putchar that works with MSIM & gxemul */
  64. void msim_write(chardev_t *dev, const char ch)
  65. {
  66.     *((char *) MSIM_VIDEORAM) = ch;
  67. }
  68.  
  69. /* Called from getc(). */
  70. void msim_enable(chardev_t *dev)
  71. {
  72.     cp0_unmask_int(MSIM_KBD_IRQ);
  73. }
  74.  
  75. /* Called from getc(). */
  76. void msim_disable(chardev_t *dev)
  77. {
  78.     cp0_mask_int(MSIM_KBD_IRQ);
  79. }
  80.  
  81. #include <print.h>
  82. /** Read character using polling, assume interrupts disabled */
  83. static char msim_do_read(chardev_t *dev)
  84. {
  85.     char ch;
  86.  
  87.     while (1) {
  88.         ch = *((volatile char *) MSIM_KBD_ADDRESS);
  89.         if (ch) {
  90.             if (ch == '\r')
  91.                 return '\n';
  92.             if (ch == 0x7f)
  93.                 return '\b';
  94.             return ch;
  95.         }
  96.     }
  97. }
  98.  
  99. /** Process keyboard interrupt. */
  100. static void msim_irq_handler(irq_t *irq, void *arg, ...)
  101. {
  102.     if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox))
  103.         ipc_irq_send_notif(irq);
  104.     else {
  105.         char ch = 0;
  106.        
  107.             ch = *((char *) MSIM_KBD_ADDRESS);
  108.             if (ch =='\r')
  109.                 ch = '\n';
  110.             if (ch == 0x7f)
  111.                 ch = '\b';
  112.             chardev_push_character(&console, ch);
  113.     }
  114. }
  115.  
  116. static irq_ownership_t msim_claim(void)
  117. {
  118.     return IRQ_ACCEPT;
  119. }
  120.  
  121. void msim_kbd_grab(void)
  122. {
  123.     msim_irq.notif_cfg.notify = false;
  124. }
  125.  
  126. void msim_kbd_release(void)
  127. {
  128.     if (msim_irq.notif_cfg.answerbox)
  129.         msim_irq.notif_cfg.notify = true;
  130. }
  131.  
  132.  
  133. /* Return console object representing msim console */
  134. void msim_console(devno_t devno)
  135. {
  136.     chardev_initialize("msim_console", &console, &msim_ops);
  137.     stdin = &console;
  138.     stdout = &console;
  139.    
  140.     irq_initialize(&msim_irq);
  141.     msim_irq.devno = devno;
  142.     msim_irq.inr = MSIM_KBD_IRQ;
  143.     msim_irq.claim = msim_claim;
  144.     msim_irq.handler = msim_irq_handler;
  145.     irq_register(&msim_irq);
  146.    
  147.     cp0_unmask_int(MSIM_KBD_IRQ);
  148.    
  149.     sysinfo_set_item_val("kbd", NULL, true);
  150.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  151.     sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ);
  152.     sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS);
  153. }
  154.  
  155. /** @}
  156.  */
  157.