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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  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. #include <arch/console.h>
  30. #include <arch/types.h>
  31. #include <typedefs.h>
  32. #include <genarch/fb/fb.h>
  33. #include <arch/drivers/fb.h>
  34. #include <genarch/ofw/ofw.h>
  35. #include <console/chardev.h>
  36. #include <console/console.h>
  37. #include <arch/asm.h>
  38. #include <arch/register.h>
  39. #include <proc/thread.h>
  40. #include <synch/mutex.h>
  41.  
  42. static void ofw_sparc64_putchar(chardev_t *d, const char ch);
  43. static char ofw_sparc64_getchar(chardev_t *d);
  44. static void ofw_sparc64_suspend(chardev_t *d);
  45. static void ofw_sparc64_resume(chardev_t *d);
  46.  
  47. mutex_t canwork;
  48.  
  49. static volatile int ofw_console_active;
  50.  
  51. static chardev_t ofw_sparc64_console;
  52. static chardev_operations_t ofw_sparc64_console_ops = {
  53.     .write = ofw_sparc64_putchar,
  54.     .read = ofw_sparc64_getchar,
  55.     .resume = ofw_sparc64_resume,
  56.     .suspend = ofw_sparc64_suspend
  57. };
  58.  
  59. /** Initialize kernel console to use OpenFirmware services. */
  60. void ofw_sparc64_console_init(void)
  61. {
  62.     chardev_initialize("ofw_sparc64_console", &ofw_sparc64_console, &ofw_sparc64_console_ops);
  63.     stdin = &ofw_sparc64_console;
  64.     stdout = &ofw_sparc64_console;
  65.     mutex_initialize(&canwork);
  66.     ofw_console_active = 1;
  67. }
  68.  
  69. /** Initialize kernel console to use framebuffer and keyboard directly. */
  70. void standalone_sparc64_console_init(void)
  71. {
  72.     ofw_console_active = 0;
  73.     stdin = NULL;
  74.     fb_init(FB_VIRT_ADDRESS, FB_X_RES, FB_Y_RES, FB_COLOR_DEPTH/8);
  75. }
  76.  
  77. /** Write one character using OpenFirmware.
  78.  *
  79.  * @param d Character device (ignored).
  80.  * @param ch Character to be written.
  81.  */
  82. void ofw_sparc64_putchar(chardev_t *d, const char ch)
  83. {
  84.     pstate_reg_t pstate;
  85.  
  86.     /*
  87.      * 32-bit OpenFirmware depends on PSTATE.AM bit set.
  88.      */
  89.     pstate.value = pstate_read();
  90.     pstate.am = true;
  91.     pstate_write(pstate.value);
  92.  
  93.     if (ch == '\n')
  94.         ofw_putchar('\r');
  95.     ofw_putchar(ch);
  96.    
  97.     pstate.am = false;
  98.     pstate_write(pstate.value);
  99. }
  100.  
  101. /** Read one character using OpenFirmware.
  102.  *
  103.  * The call is non-blocking.
  104.  *
  105.  * @param d Character device (ignored).
  106.  * @return Character read or zero if no character was read.
  107.  */
  108. char ofw_sparc64_getchar(chardev_t *d)
  109. {
  110.     char ch;
  111.     pstate_reg_t pstate;
  112.  
  113.     /*
  114.      * 32-bit OpenFirmware depends on PSTATE.AM bit set.
  115.      */
  116.     pstate.value = pstate_read();
  117.     pstate.am = true;
  118.     pstate_write(pstate.value);
  119.  
  120.     ch = ofw_getchar();
  121.    
  122.     pstate.am = false;
  123.     pstate_write(pstate.value);
  124.    
  125.     return ch;
  126. }
  127.  
  128. void ofw_sparc64_suspend(chardev_t *d)
  129. {
  130.     mutex_lock(&canwork);
  131. }
  132.  
  133. void ofw_sparc64_resume(chardev_t *d)
  134. {
  135.     mutex_unlock(&canwork);
  136. }
  137.  
  138. /** Kernel thread for pushing characters read from OFW to input buffer.
  139.  *
  140.  * @param arg Ignored.
  141.  */
  142. void kofwinput(void *arg)
  143. {
  144.  
  145.     while (ofw_console_active) {
  146.         char ch = 0;
  147.        
  148.         mutex_lock(&canwork);
  149.         mutex_unlock(&canwork);
  150.        
  151.         ch = ofw_sparc64_getchar(NULL);
  152.         if (ch) {
  153.             if (ch == '\r')
  154.                 ch = '\n';
  155.             chardev_push_character(&ofw_sparc64_console, ch);
  156.         }
  157.         thread_usleep(25000);
  158.     }
  159. }
  160.