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  1. /*
  2.  * Copyright (c) 2001-2004 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 genarch
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief   Zilog 8530 serial port / keyboard driver.
  35.  */
  36.  
  37. #include <genarch/kbd/z8530.h>
  38. #include <genarch/kbd/key.h>
  39. #include <genarch/kbd/scanc.h>
  40. #include <genarch/kbd/scanc_sun.h>
  41. #include <arch/drivers/z8530.h>
  42. #include <ddi/irq.h>
  43. #include <ipc/irq.h>
  44. #include <arch/interrupt.h>
  45. #include <arch/drivers/kbd.h>
  46. #include <cpu.h>
  47. #include <arch/asm.h>
  48. #include <arch.h>
  49. #include <console/chardev.h>
  50. #include <console/console.h>
  51. #include <interrupt.h>
  52. #include <sysinfo/sysinfo.h>
  53. #include <print.h>
  54.  
  55. /*
  56.  * These codes read from z8530 data register are silently ignored.
  57.  */
  58. #define IGNORE_CODE 0x7f        /* all keys up */
  59.  
  60. static z8530_t z8530;       /**< z8530 device structure. */
  61. static irq_t z8530_irq;     /**< z8530's IRQ. */
  62.  
  63. static void z8530_suspend(chardev_t *);
  64. static void z8530_resume(chardev_t *);
  65.  
  66. static chardev_operations_t ops = {
  67.     .suspend = z8530_suspend,
  68.     .resume = z8530_resume,
  69.     .read = z8530_key_read
  70. };
  71.  
  72. /** Initialize keyboard and service interrupts using kernel routine. */
  73. void z8530_grab(void)
  74. {
  75.     ipl_t ipl = interrupts_disable();
  76.  
  77.     (void) z8530_read_a(&z8530, RR8);
  78.  
  79.     /*
  80.      * Clear any pending TX interrupts or we never manage
  81.      * to set FHC UART interrupt state to idle.
  82.      */
  83.     z8530_write_a(&z8530, WR0, WR0_TX_IP_RST);
  84.  
  85.     /* interrupt on all characters */
  86.     z8530_write_a(&z8530, WR1, WR1_IARCSC);
  87.  
  88.     /* 8 bits per character and enable receiver */
  89.     z8530_write_a(&z8530, WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
  90.    
  91.     /* Master Interrupt Enable. */
  92.     z8530_write_a(&z8530, WR9, WR9_MIE);
  93.    
  94.     spinlock_lock(&z8530_irq.lock);
  95.     z8530_irq.notif_cfg.notify = false;
  96.     spinlock_unlock(&z8530_irq.lock);
  97.     interrupts_restore(ipl);
  98. }
  99.  
  100. /** Resume the former IPC notification behavior. */
  101. void z8530_release(void)
  102. {
  103.     ipl_t ipl = interrupts_disable();
  104.     spinlock_lock(&z8530_irq.lock);
  105.     if (z8530_irq.notif_cfg.answerbox)
  106.         z8530_irq.notif_cfg.notify = true;
  107.     spinlock_unlock(&z8530_irq.lock);
  108.     interrupts_restore(ipl);
  109. }
  110.  
  111. /** Initialize z8530. */
  112. void
  113. z8530_init(devno_t devno, uintptr_t vaddr, inr_t inr, cir_t cir, void *cir_arg)
  114. {
  115.     chardev_initialize("z8530_kbd", &kbrd, &ops);
  116.     stdin = &kbrd;
  117.  
  118.     z8530.devno = devno;
  119.     z8530.reg = (uint8_t *) vaddr;
  120.  
  121.     irq_initialize(&z8530_irq);
  122.     z8530_irq.devno = devno;
  123.     z8530_irq.inr = inr;
  124.     z8530_irq.claim = z8530_claim;
  125.     z8530_irq.handler = z8530_irq_handler;
  126.     z8530_irq.cir = cir;
  127.     z8530_irq.cir_arg = cir_arg;
  128.     irq_register(&z8530_irq);
  129.  
  130.     sysinfo_set_item_val("kbd", NULL, true);
  131.     sysinfo_set_item_val("kbd.type", NULL, KBD_Z8530);
  132.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  133.     sysinfo_set_item_val("kbd.inr", NULL, inr);
  134.     sysinfo_set_item_val("kbd.address.virtual", NULL, vaddr);
  135.  
  136.     z8530_grab();
  137. }
  138.  
  139. /** Process z8530 interrupt.
  140.  *
  141.  * @param n Interrupt vector.
  142.  * @param istate Interrupted state.
  143.  */
  144. void z8530_interrupt(void)
  145. {
  146.     z8530_poll();
  147. }
  148.  
  149. /* Called from getc(). */
  150. void z8530_resume(chardev_t *d)
  151. {
  152. }
  153.  
  154. /* Called from getc(). */
  155. void z8530_suspend(chardev_t *d)
  156. {
  157. }
  158.  
  159. char z8530_key_read(chardev_t *d)
  160. {
  161.     char ch;   
  162.  
  163.     while(!(ch = active_read_buff_read())) {
  164.         uint8_t x;
  165.         while (!(z8530_read_a(&z8530, RR0) & RR0_RCA))
  166.             ;
  167.         x = z8530_read_a(&z8530, RR8);
  168.         if (x != IGNORE_CODE) {
  169.             if (x & KEY_RELEASE)
  170.                 key_released(x ^ KEY_RELEASE);
  171.             else
  172.                 active_read_key_pressed(x);
  173.         }
  174.     }
  175.     return ch;
  176. }
  177.  
  178. /** Poll for key press and release events.
  179.  *
  180.  * This function can be used to implement keyboard polling.
  181.  */
  182. void z8530_poll(void)
  183. {
  184.     uint8_t x;
  185.  
  186.     while (z8530_read_a(&z8530, RR0) & RR0_RCA) {
  187.         x = z8530_read_a(&z8530, RR8);
  188.         if (x != IGNORE_CODE) {
  189.             if (x & KEY_RELEASE)
  190.                 key_released(x ^ KEY_RELEASE);
  191.             else
  192.                 key_pressed(x);
  193.         }
  194.     }
  195. }
  196.  
  197. irq_ownership_t z8530_claim(void *instance)
  198. {
  199.     return (z8530_read_a(&z8530, RR0) & RR0_RCA);
  200. }
  201.  
  202. void z8530_irq_handler(irq_t *irq)
  203. {
  204.     if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
  205.         ipc_irq_send_notif(irq);
  206.     else
  207.         z8530_interrupt();
  208. }
  209.  
  210. /** @}
  211.  */
  212.