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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 <ipc/irq.h>
  37. #include <console/chardev.h>
  38. #include <arch/drivers/msim.h>
  39. #include <arch/cp0.h>
  40. #include <console/console.h>
  41. #include <sysinfo/sysinfo.h>
  42.  
  43. static chardev_t console;
  44. static irq_t msim_irq;
  45.  
  46. static void msim_write(chardev_t *dev, const char ch);
  47. static void msim_enable(chardev_t *dev);
  48. static void msim_disable(chardev_t *dev);
  49. static char msim_do_read(chardev_t *dev);
  50.  
  51. static chardev_operations_t msim_ops = {
  52.     .resume = msim_enable,
  53.     .suspend = msim_disable,
  54.     .write = msim_write,
  55.     .read = msim_do_read,
  56. };
  57.  
  58. /** Putchar that works with MSIM & gxemul */
  59. void msim_write(chardev_t *dev, const char ch)
  60. {
  61.     *((char *) MSIM_VIDEORAM) = ch;
  62. }
  63.  
  64. /* Called from getc(). */
  65. void msim_enable(chardev_t *dev)
  66. {
  67.     cp0_unmask_int(MSIM_KBD_IRQ);
  68. }
  69.  
  70. /* Called from getc(). */
  71. void msim_disable(chardev_t *dev)
  72. {
  73.     cp0_mask_int(MSIM_KBD_IRQ);
  74. }
  75.  
  76. #include <print.h>
  77. /** Read character using polling, assume interrupts disabled */
  78. static char msim_do_read(chardev_t *dev)
  79. {
  80.     char ch;
  81.  
  82.     while (1) {
  83.         ch = *((volatile char *) MSIM_KBD_ADDRESS);
  84.         if (ch) {
  85.             if (ch == '\r')
  86.                 return '\n';
  87.             if (ch == 0x7f)
  88.                 return '\b';
  89.             return ch;
  90.         }
  91.     }
  92. }
  93.  
  94. /** Process keyboard interrupt. */
  95. static void msim_irq_handler(irq_t *irq, void *arg, ...)
  96. {
  97.     if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox))
  98.         ipc_irq_send_notif(irq);
  99.     else {
  100.         char ch = 0;
  101.        
  102.             ch = *((char *) MSIM_KBD_ADDRESS);
  103.             if (ch =='\r')
  104.                 ch = '\n';
  105.             if (ch == 0x7f)
  106.                 ch = '\b';
  107.             chardev_push_character(&console, ch);
  108.     }
  109. }
  110.  
  111. static irq_ownership_t msim_claim(void)
  112. {
  113.     return IRQ_ACCEPT;
  114. }
  115.  
  116. void msim_kbd_grab(void)
  117. {
  118.     ipl_t ipl = interrupts_disable();
  119.     spinlock_lock(&msim_irq.lock);
  120.     msim_irq.notif_cfg.notify = false;
  121.     spinlock_unlock(&msim_irq.lock);
  122.     interrupts_restore(ipl);
  123. }
  124.  
  125. void msim_kbd_release(void)
  126. {
  127.     ipl_t ipl = interrupts_disable();
  128.     spinlock_lock(&msim_irq.lock);
  129.     if (msim_irq.notif_cfg.answerbox)
  130.         msim_irq.notif_cfg.notify = true;
  131.     spinlock_unlock(&msim_irq.lock);
  132.     interrupts_restore(ipl);
  133. }
  134.  
  135.  
  136. /* Return console object representing msim console */
  137. void msim_console(devno_t devno)
  138. {
  139.     chardev_initialize("msim_console", &console, &msim_ops);
  140.     stdin = &console;
  141.     stdout = &console;
  142.    
  143.     irq_initialize(&msim_irq);
  144.     msim_irq.devno = devno;
  145.     msim_irq.inr = MSIM_KBD_IRQ;
  146.     msim_irq.claim = msim_claim;
  147.     msim_irq.handler = msim_irq_handler;
  148.     irq_register(&msim_irq);
  149.    
  150.     cp0_unmask_int(MSIM_KBD_IRQ);
  151.    
  152.     sysinfo_set_item_val("kbd", NULL, true);
  153.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  154.     sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ);
  155.     sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS);
  156. }
  157.  
  158. /** @}
  159.  */
  160.