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  1. /*
  2.  * Copyright (c) 2005-2007 Ondrej Palkovsky, Michal Kebrt
  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 arm32
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <interrupt.h>
  36. #include <ipc/irq.h>
  37. #include <console/chardev.h>
  38. #include <arch/drivers/gxemul.h>
  39. #include <console/console.h>
  40. #include <sysinfo/sysinfo.h>
  41. #include <print.h>
  42.  
  43. /** Address of devices. */
  44. #define GXEMUL_VIDEORAM     0x10000000
  45. #define GXEMUL_KBD_ADDRESS  0x10000000
  46. #define GXEMUL_KBD_IRQ      0
  47.  
  48. static chardev_t console;
  49. static irq_t gxemul_irq;
  50.  
  51. static void gxemul_write(chardev_t *dev, const char ch);
  52. static void gxemul_enable(chardev_t *dev);
  53. static void gxemul_disable(chardev_t *dev);
  54. static char gxemul_do_read(chardev_t *dev);
  55.  
  56. static chardev_operations_t gxemul_ops = {
  57.     .resume = gxemul_enable,
  58.     .suspend = gxemul_disable,
  59.     .write = gxemul_write,
  60.     .read = gxemul_do_read,
  61. };
  62.  
  63. /** Putchar that works with gxemul */
  64. void gxemul_write(chardev_t *dev, const char ch)
  65. {
  66.     *((char *) GXEMUL_VIDEORAM) = ch;
  67. }
  68.  
  69. /* Called from getc(). */
  70. void gxemul_enable(chardev_t *dev)
  71. {
  72. //  cp0_unmask_int(GXEMUL_KBD_IRQ);
  73. }
  74.  
  75. /* Called from getc(). */
  76. void gxemul_disable(chardev_t *dev)
  77. {
  78. //  cp0_mask_int(GXEMUL_KBD_IRQ);
  79. }
  80.  
  81. /** Read character using polling, assume interrupts disabled */
  82. static char gxemul_do_read(chardev_t *dev)
  83. {
  84.     char ch;
  85.  
  86.     while (1) {
  87.         ch = *((volatile char *) GXEMUL_KBD_ADDRESS);
  88.         if (ch) {
  89.             if (ch == '\r')
  90.                 return '\n';
  91.             if (ch == 0x7f)
  92.                 return '\b';
  93.             return ch;
  94.         }
  95.     }
  96. }
  97.  
  98. /** Process keyboard interrupt. */
  99. static void gxemul_irq_handler(irq_t *irq, void *arg, ...)
  100. {
  101.     if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox))
  102.         ipc_irq_send_notif(irq);
  103.     else {
  104.         char ch = 0;
  105.        
  106.             ch = *((char *) GXEMUL_KBD_ADDRESS);
  107.             if (ch =='\r')
  108.                 ch = '\n';
  109.             if (ch == 0x7f)
  110.                 ch = '\b';
  111.             chardev_push_character(&console, ch);
  112.     }
  113. }
  114.  
  115. static irq_ownership_t gxemul_claim(void)
  116. {
  117.     return IRQ_ACCEPT;
  118. }
  119.  
  120. void gxemul_kbd_grab(void)
  121. {
  122.     ipl_t ipl = interrupts_disable();
  123.     spinlock_lock(&msim_irq.lock);
  124.     gxemul_irq.notif_cfg.notify = false;
  125.     spinlock_unlock(&gxemul_irq.lock);
  126.     interrupts_restore(ipl);
  127. }
  128.  
  129. void gxemul_kbd_release(void)
  130. {
  131.     ipl_t ipl = interrupts_disable();
  132.     spinlock_lock(&gxemul_irq.lock);
  133.     if (gxemul_irq.notif_cfg.answerbox)
  134.         gxemul_irq.notif_cfg.notify = true;
  135.     spinlock_unlock(&gxemul_irq.lock);
  136.     interrupts_restore(ipl);
  137. }
  138.  
  139.  
  140. /* Return console object representing msim console */
  141. void gxemul_console(devno_t devno)
  142. {
  143.     chardev_initialize("msim_console", &console, &gxemul_ops);
  144.     stdin = &console;
  145.     stdout = &console;
  146.    
  147.     irq_initialize(&gxemul_irq);
  148.     gxemul_irq.devno = devno;
  149.     gxemul_irq.inr = GXEMUL_KBD_IRQ;
  150.     gxemul_irq.claim = gxemul_claim;
  151.     gxemul_irq.handler = gxemul_irq_handler;
  152.     irq_register(&gxemul_irq);
  153.    
  154. //  cp0_unmask_int(GXEMUL_KBD_IRQ);
  155.    
  156.     sysinfo_set_item_val("kbd", NULL, true);
  157.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  158.     sysinfo_set_item_val("kbd.inr", NULL, GXEMUL_KBD_IRQ);
  159.     sysinfo_set_item_val("kbd.address.virtual", NULL, GXEMUL_KBD_ADDRESS);
  160. }
  161.  
  162. /** @}
  163.  */
  164.