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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. #include <ddi/ddi.h>
  43.  
  44. static chardev_t console;
  45. static irq_t msim_irq;
  46.  
  47. static void msim_write(chardev_t *dev, const char ch, bool silent);
  48. static void msim_enable(chardev_t *dev);
  49. static void msim_disable(chardev_t *dev);
  50. static char msim_do_read(chardev_t *dev);
  51.  
  52. static chardev_operations_t msim_ops = {
  53.     .resume = msim_enable,
  54.     .suspend = msim_disable,
  55.     .write = msim_write,
  56.     .read = msim_do_read,
  57. };
  58.  
  59. /** Putchar that works with MSIM & gxemul */
  60. void msim_write(chardev_t *dev, const char ch, bool silent)
  61. {
  62.     if (!silent)
  63.         *((char *) MSIM_VIDEORAM) = ch;
  64. }
  65.  
  66. /* Called from getc(). */
  67. void msim_enable(chardev_t *dev)
  68. {
  69.     cp0_unmask_int(MSIM_KBD_IRQ);
  70. }
  71.  
  72. /* Called from getc(). */
  73. void msim_disable(chardev_t *dev)
  74. {
  75.     cp0_mask_int(MSIM_KBD_IRQ);
  76. }
  77.  
  78. /** Read character using polling, assume interrupts disabled */
  79. static char msim_do_read(chardev_t *dev)
  80. {
  81.     char ch;
  82.    
  83.     while (1) {
  84.         ch = *((volatile char *) MSIM_KBD_ADDRESS);
  85.         if (ch) {
  86.             if (ch == '\r')
  87.                 return '\n';
  88.             if (ch == 0x7f)
  89.                 return '\b';
  90.             return ch;
  91.         }
  92.     }
  93. }
  94.  
  95. /** Process keyboard interrupt. */
  96. static void msim_irq_handler(irq_t *irq)
  97. {
  98.     if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox))
  99.         ipc_irq_send_notif(irq);
  100.     else {
  101.         char ch = 0;
  102.        
  103.         ch = *((char *) MSIM_KBD_ADDRESS);
  104.         if (ch =='\r')
  105.             ch = '\n';
  106.         if (ch == 0x7f)
  107.             ch = '\b';
  108.         chardev_push_character(&console, ch);
  109.     }
  110. }
  111.  
  112. static irq_ownership_t msim_claim(void *instance)
  113. {
  114.     return IRQ_ACCEPT;
  115. }
  116.  
  117. void msim_kbd_grab(void)
  118. {
  119.     ipl_t ipl = interrupts_disable();
  120.     spinlock_lock(&msim_irq.lock);
  121.     msim_irq.notif_cfg.notify = false;
  122.     spinlock_unlock(&msim_irq.lock);
  123.     interrupts_restore(ipl);
  124. }
  125.  
  126. void msim_kbd_release(void)
  127. {
  128.     ipl_t ipl = interrupts_disable();
  129.     spinlock_lock(&msim_irq.lock);
  130.     if (msim_irq.notif_cfg.answerbox)
  131.         msim_irq.notif_cfg.notify = true;
  132.     spinlock_unlock(&msim_irq.lock);
  133.     interrupts_restore(ipl);
  134. }
  135.  
  136.  
  137. /* Return console object representing msim console */
  138. void msim_console(devno_t devno)
  139. {
  140.     chardev_initialize("msim_console", &console, &msim_ops);
  141.     stdin = &console;
  142.     stdout = &console;
  143.    
  144.     irq_initialize(&msim_irq);
  145.     msim_irq.devno = devno;
  146.     msim_irq.inr = MSIM_KBD_IRQ;
  147.     msim_irq.claim = msim_claim;
  148.     msim_irq.handler = msim_irq_handler;
  149.     irq_register(&msim_irq);
  150.    
  151.     cp0_unmask_int(MSIM_KBD_IRQ);
  152.    
  153.     sysinfo_set_item_val("kbd", NULL, true);
  154.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  155.     sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ);
  156.     sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS);
  157.    
  158.     sysinfo_set_item_val("fb", NULL, true);
  159.     sysinfo_set_item_val("fb.kind", NULL, 3);
  160.     sysinfo_set_item_val("fb.address.physical", NULL, KA2PA(MSIM_VIDEORAM));
  161. }
  162.  
  163. /** @}
  164.  */
  165.