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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. /** @addtogroup ia64   
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/ski/ski.h>
  36. #include <console/console.h>
  37. #include <console/chardev.h>
  38. #include <arch/interrupt.h>
  39. #include <sysinfo/sysinfo.h>
  40. #include <arch/types.h>
  41. #include <ddi/device.h>
  42. #include <ddi/irq.h>
  43. #include <ipc/irq.h>
  44. #include <proc/thread.h>
  45. #include <synch/spinlock.h>
  46. #include <arch/asm.h>
  47. #include <arch/drivers/kbd.h>
  48.  
  49. #define SKI_KBD_INR 0
  50.  
  51. static irq_t ski_kbd_irq;
  52. static devno_t ski_kbd_devno;
  53.  
  54. chardev_t ski_console;
  55. chardev_t ski_uconsole;
  56.  
  57. static bool kbd_disabled;
  58.  
  59. /** Display character on debug console
  60.  *
  61.  * Use SSC (Simulator System Call) to
  62.  * display character on debug console.
  63.  *
  64.  * @param d Character device.
  65.  * @param ch Character to be printed.
  66.  */
  67. static void ski_putchar(chardev_t *d, const char ch, bool silent)
  68. {
  69.     if (!silent) {
  70.         asm volatile (
  71.             "mov r15 = %0\n"
  72.             "mov r32 = %1\n"   /* r32 is in0 */
  73.             "break 0x80000\n"  /* modifies r8 */
  74.             :
  75.             : "i" (SKI_PUTCHAR), "r" (ch)
  76.             : "r15", "in0", "r8"
  77.         );
  78.        
  79.         if (ch == '\n')
  80.             ski_putchar(d, '\r', silent);
  81.     }
  82. }
  83.  
  84. /** Ask debug console if a key was pressed.
  85.  *
  86.  * Use SSC (Simulator System Call) to
  87.  * get character from debug console.
  88.  *
  89.  * This call is non-blocking.
  90.  *
  91.  * @return ASCII code of pressed key or 0 if no key pressed.
  92.  */
  93. static int32_t ski_getchar(void)
  94. {
  95.     uint64_t ch;
  96.    
  97.     asm volatile (
  98.         "mov r15 = %1\n"
  99.         "break 0x80000;;\n" /* modifies r8 */
  100.         "mov %0 = r8;;\n"      
  101.  
  102.         : "=r" (ch)
  103.         : "i" (SKI_GETCHAR)
  104.         : "r15", "r8"
  105.     );
  106.  
  107.     return (int32_t) ch;
  108. }
  109.  
  110. /**
  111.  * This is a blocking wrapper for ski_getchar().
  112.  * To be used when the kernel crashes.
  113.  */
  114. static char ski_getchar_blocking(chardev_t *d)
  115. {
  116.     int ch;
  117.  
  118.     while(!(ch = ski_getchar()))
  119.         ;
  120.     if (ch == '\r')
  121.         ch = '\n';
  122.     return (char) ch;
  123. }
  124.  
  125. /** Ask keyboard if a key was pressed. */
  126. static void poll_keyboard(void)
  127. {
  128.     char ch;
  129.     static char last;
  130.     ipl_t ipl;
  131.  
  132.     ipl = interrupts_disable();
  133.  
  134.     if (kbd_disabled) {
  135.         interrupts_restore(ipl);
  136.         return;
  137.     }
  138.        
  139.     spinlock_lock(&ski_kbd_irq.lock);
  140.  
  141.     ch = ski_getchar();
  142.     if(ch == '\r')
  143.         ch = '\n';
  144.     if (ch) {
  145.         if (ski_kbd_irq.notif_cfg.notify &&
  146.             ski_kbd_irq.notif_cfg.answerbox) {
  147.             chardev_push_character(&ski_uconsole, ch);
  148.             ipc_irq_send_notif(&ski_kbd_irq);
  149.         } else {
  150.             chardev_push_character(&ski_console, ch);
  151.         }  
  152.         last = ch;
  153.         spinlock_unlock(&ski_kbd_irq.lock);
  154.         interrupts_restore(ipl);
  155.         return;
  156.     }
  157.  
  158.     if (last) {
  159.         if (ski_kbd_irq.notif_cfg.notify &&
  160.             ski_kbd_irq.notif_cfg.answerbox) {
  161.             chardev_push_character(&ski_uconsole, 0);
  162.             ipc_irq_send_notif(&ski_kbd_irq);
  163.         }
  164.         last = 0;
  165.     }
  166.  
  167.     spinlock_unlock(&ski_kbd_irq.lock);
  168.     interrupts_restore(ipl);
  169. }
  170.  
  171. /* Called from getc(). */
  172. static void ski_kbd_enable(chardev_t *d)
  173. {
  174.     kbd_disabled = false;
  175. }
  176.  
  177. /* Called from getc(). */
  178. static void ski_kbd_disable(chardev_t *d)
  179. {
  180.     kbd_disabled = true;   
  181. }
  182.  
  183. /** Decline to service hardware IRQ.
  184.  *
  185.  * This is only a virtual IRQ, so always decline.
  186.  *
  187.  * @return Always IRQ_DECLINE.
  188.  */
  189. static irq_ownership_t ski_kbd_claim(void)
  190. {
  191.     return IRQ_DECLINE;
  192. }
  193.  
  194. static chardev_operations_t ski_ops = {
  195.     .resume = ski_kbd_enable,
  196.     .suspend = ski_kbd_disable,
  197.     .write = ski_putchar,
  198.     .read = ski_getchar_blocking
  199. };
  200.  
  201. /** Initialize debug console
  202.  *
  203.  * Issue SSC (Simulator System Call) to
  204.  * to open debug console.
  205.  */
  206. void ski_init_console(void)
  207. {
  208.     asm volatile (
  209.         "mov r15 = %0\n"
  210.         "break 0x80000\n"
  211.         :
  212.         : "i" (SKI_INIT_CONSOLE)
  213.         : "r15", "r8"
  214.     );
  215.  
  216.     chardev_initialize("ski_console", &ski_console, &ski_ops);
  217.     chardev_initialize("ski_uconsole", &ski_uconsole, &ski_ops);
  218.     stdin = &ski_console;
  219.     stdout = &ski_console;
  220.  
  221.     ski_kbd_devno = device_assign_devno();
  222.    
  223.     irq_initialize(&ski_kbd_irq);
  224.     ski_kbd_irq.inr = SKI_KBD_INR;
  225.     ski_kbd_irq.devno = ski_kbd_devno;
  226.     ski_kbd_irq.claim = ski_kbd_claim;
  227.     irq_register(&ski_kbd_irq);
  228.  
  229.     sysinfo_set_item_val("kbd", NULL, true);
  230.     sysinfo_set_item_val("kbd.inr", NULL, SKI_KBD_INR);
  231.     sysinfo_set_item_val("kbd.devno", NULL, ski_kbd_devno);
  232.     sysinfo_set_item_val("kbd.type", NULL, KBD_SKI);
  233.  
  234.     sysinfo_set_item_val("fb", NULL, false);
  235. }
  236.  
  237. void ski_kbd_grab(void)
  238. {
  239.     ipl_t ipl = interrupts_disable();
  240.     spinlock_lock(&ski_kbd_irq.lock);
  241.     ski_kbd_irq.notif_cfg.notify = false;
  242.     spinlock_unlock(&ski_kbd_irq.lock);
  243.     interrupts_restore(ipl);
  244. }
  245.  
  246. void ski_kbd_release(void)
  247. {
  248.     ipl_t ipl = interrupts_disable();
  249.     spinlock_lock(&ski_kbd_irq.lock);
  250.     if (ski_kbd_irq.notif_cfg.answerbox)
  251.         ski_kbd_irq.notif_cfg.notify = true;
  252.     spinlock_unlock(&ski_kbd_irq.lock);
  253.     interrupts_restore(ipl);
  254. }
  255.  
  256.  
  257. #define POLL_INTERVAL       50000       /* 50 ms */
  258.  
  259. /** Kernel thread for polling keyboard. */
  260. void kkbdpoll(void *arg)
  261. {
  262.     while (1) {
  263.         poll_keyboard();
  264.         thread_usleep(POLL_INTERVAL);
  265.     }
  266. }
  267.  
  268. /** @}
  269.  */
  270.