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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 <arch/drivers/keyboard.h>
  35. #include <genarch/ofw/ofw.h>
  36. #include <console/chardev.h>
  37. #include <console/console.h>
  38. #include <arch/asm.h>
  39. #include <arch/register.h>
  40. #include <proc/thread.h>
  41. #include <synch/mutex.h>
  42.  
  43. static void ofw_sparc64_putchar(chardev_t *d, const char ch);
  44. static char ofw_sparc64_getchar(chardev_t *d);
  45. static void ofw_sparc64_suspend(chardev_t *d);
  46. static void ofw_sparc64_resume(chardev_t *d);
  47.  
  48. mutex_t canwork;
  49.  
  50. static volatile int ofw_console_active;
  51.  
  52. static chardev_t ofw_sparc64_console;
  53. static chardev_operations_t ofw_sparc64_console_ops = {
  54.     .write = ofw_sparc64_putchar,
  55.     .read = ofw_sparc64_getchar,
  56.     .resume = ofw_sparc64_resume,
  57.     .suspend = ofw_sparc64_suspend
  58. };
  59.  
  60. /** Initialize kernel console to use OpenFirmware services. */
  61. void ofw_sparc64_console_init(void)
  62. {
  63.     chardev_initialize("ofw_sparc64_console", &ofw_sparc64_console, &ofw_sparc64_console_ops);
  64.     stdin = &ofw_sparc64_console;
  65.     stdout = &ofw_sparc64_console;
  66.     mutex_initialize(&canwork);
  67.     ofw_console_active = 1;
  68. }
  69.  
  70. /** Initialize kernel console to use framebuffer and keyboard directly. */
  71. void standalone_sparc64_console_init(void)
  72. {
  73.     ofw_console_active = 0;
  74.     stdin = NULL;
  75.     fb_init(FB_VIRT_ADDRESS, FB_X_RES, FB_Y_RES, FB_COLOR_DEPTH/8);
  76. }
  77.  
  78. /** Write one character using OpenFirmware.
  79.  *
  80.  * @param d Character device (ignored).
  81.  * @param ch Character to be written.
  82.  */
  83. void ofw_sparc64_putchar(chardev_t *d, const char ch)
  84. {
  85.     pstate_reg_t pstate;
  86.  
  87.     /*
  88.      * 32-bit OpenFirmware depends on PSTATE.AM bit set.
  89.      */
  90.     pstate.value = pstate_read();
  91.     pstate.am = true;
  92.     pstate_write(pstate.value);
  93.  
  94.     if (ch == '\n')
  95.         ofw_putchar('\r');
  96.     ofw_putchar(ch);
  97.    
  98.     pstate.am = false;
  99.     pstate_write(pstate.value);
  100. }
  101.  
  102. /** Read one character using OpenFirmware.
  103.  *
  104.  * The call is non-blocking.
  105.  *
  106.  * @param d Character device (ignored).
  107.  * @return Character read or zero if no character was read.
  108.  */
  109. char ofw_sparc64_getchar(chardev_t *d)
  110. {
  111.     char ch;
  112.     pstate_reg_t pstate;
  113.  
  114.     /*
  115.      * 32-bit OpenFirmware depends on PSTATE.AM bit set.
  116.      */
  117.     pstate.value = pstate_read();
  118.     pstate.am = true;
  119.     pstate_write(pstate.value);
  120.  
  121.     ch = ofw_getchar();
  122.    
  123.     pstate.am = false;
  124.     pstate_write(pstate.value);
  125.    
  126.     return ch;
  127. }
  128.  
  129. void ofw_sparc64_suspend(chardev_t *d)
  130. {
  131.     mutex_lock(&canwork);
  132. }
  133.  
  134. void ofw_sparc64_resume(chardev_t *d)
  135. {
  136.     mutex_unlock(&canwork);
  137. }
  138.  
  139. /** Kernel thread for pushing characters read from OFW to input buffer.
  140.  *
  141.  * @param arg Ignored.
  142.  */
  143. void kofwinput(void *arg)
  144. {
  145.  
  146.     while (ofw_console_active) {
  147.         char ch = 0;
  148.        
  149.         mutex_lock(&canwork);
  150.         mutex_unlock(&canwork);
  151.        
  152.         ch = ofw_sparc64_getchar(NULL);
  153.         if (ch) {
  154.             if (ch == '\r')
  155.                 ch = '\n';
  156.             chardev_push_character(&ofw_sparc64_console, ch);
  157.         }
  158.         thread_usleep(25000);
  159.     }
  160. }
  161.