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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 parea_t msim_parea;
  45. static chardev_t console;
  46. static irq_t msim_irq;
  47.  
  48. static void msim_write(chardev_t *dev, const char ch);
  49. static void msim_enable(chardev_t *dev);
  50. static void msim_disable(chardev_t *dev);
  51. static char msim_do_read(chardev_t *dev);
  52.  
  53. static chardev_operations_t msim_ops = {
  54.     .resume = msim_enable,
  55.     .suspend = msim_disable,
  56.     .write = msim_write,
  57.     .read = msim_do_read,
  58. };
  59.  
  60. /** Putchar that works with MSIM & gxemul */
  61. void msim_write(chardev_t *dev, const char ch)
  62. {
  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. #include <print.h>
  79. /** Read character using polling, assume interrupts disabled */
  80. static char msim_do_read(chardev_t *dev)
  81. {
  82.     char ch;
  83.  
  84.     while (1) {
  85.         ch = *((volatile char *) MSIM_KBD_ADDRESS);
  86.         if (ch) {
  87.             if (ch == '\r')
  88.                 return '\n';
  89.             if (ch == 0x7f)
  90.                 return '\b';
  91.             return ch;
  92.         }
  93.     }
  94. }
  95.  
  96. /** Process keyboard interrupt. */
  97. static void msim_irq_handler(irq_t *irq, void *arg, ...)
  98. {
  99.     if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox))
  100.         ipc_irq_send_notif(irq);
  101.     else {
  102.         char ch = 0;
  103.        
  104.             ch = *((char *) MSIM_KBD_ADDRESS);
  105.             if (ch =='\r')
  106.                 ch = '\n';
  107.             if (ch == 0x7f)
  108.                 ch = '\b';
  109.             chardev_push_character(&console, ch);
  110.     }
  111. }
  112.  
  113. static irq_ownership_t msim_claim(void)
  114. {
  115.     return IRQ_ACCEPT;
  116. }
  117.  
  118. void msim_kbd_grab(void)
  119. {
  120.     ipl_t ipl = interrupts_disable();
  121.     spinlock_lock(&msim_irq.lock);
  122.     msim_irq.notif_cfg.notify = false;
  123.     spinlock_unlock(&msim_irq.lock);
  124.     interrupts_restore(ipl);
  125. }
  126.  
  127. void msim_kbd_release(void)
  128. {
  129.     ipl_t ipl = interrupts_disable();
  130.     spinlock_lock(&msim_irq.lock);
  131.     if (msim_irq.notif_cfg.answerbox)
  132.         msim_irq.notif_cfg.notify = true;
  133.     spinlock_unlock(&msim_irq.lock);
  134.     interrupts_restore(ipl);
  135. }
  136.  
  137.  
  138. /* Return console object representing msim console */
  139. void msim_console(devno_t devno)
  140. {
  141.     chardev_initialize("msim_console", &console, &msim_ops);
  142.     stdin = &console;
  143.     stdout = &console;
  144.    
  145.     irq_initialize(&msim_irq);
  146.     msim_irq.devno = devno;
  147.     msim_irq.inr = MSIM_KBD_IRQ;
  148.     msim_irq.claim = msim_claim;
  149.     msim_irq.handler = msim_irq_handler;
  150.     irq_register(&msim_irq);
  151.    
  152.     cp0_unmask_int(MSIM_KBD_IRQ);
  153.    
  154.     sysinfo_set_item_val("kbd", NULL, true);
  155.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  156.     sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ);
  157.     sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS);
  158.    
  159.     msim_parea.pbase = KA2PA(MSIM_VIDEORAM);
  160.     msim_parea.vbase = MSIM_VIDEORAM;
  161.     msim_parea.frames = 1;
  162.     msim_parea.cacheable = false;
  163.     ddi_parea_register(&msim_parea);
  164.    
  165.     sysinfo_set_item_val("fb", NULL, true);
  166.     sysinfo_set_item_val("fb.kind", NULL, 3);
  167.     sysinfo_set_item_val("fb.address.physical", NULL, KA2PA(MSIM_VIDEORAM));
  168. }
  169.  
  170. /** @}
  171.  */
  172.