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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 <arch/drivers/fhc.h>
  47. #include <cpu.h>
  48. #include <arch/asm.h>
  49. #include <arch.h>
  50. #include <console/chardev.h>
  51. #include <console/console.h>
  52. #include <interrupt.h>
  53. #include <sysinfo/sysinfo.h>
  54. #include <print.h>
  55.  
  56. /*
  57.  * These codes read from z8530 data register are silently ignored.
  58.  */
  59. #define IGNORE_CODE 0x7f        /* all keys up */
  60.  
  61. static z8530_t z8530;       /**< z8530 device structure. */
  62. static irq_t z8530_irq;     /**< z8530's IRQ. */
  63.  
  64. static void z8530_suspend(chardev_t *);
  65. static void z8530_resume(chardev_t *);
  66.  
  67. static chardev_operations_t ops = {
  68.     .suspend = z8530_suspend,
  69.     .resume = z8530_resume,
  70.     .read = z8530_key_read
  71. };
  72.  
  73. /** Initialize keyboard and service interrupts using kernel routine. */
  74. void z8530_grab(void)
  75. {
  76.     ipl_t ipl = interrupts_disable();
  77.  
  78.     (void) z8530_read_a(&z8530, RR8);
  79.  
  80.     /*
  81.      * Clear any pending TX interrupts or we never manage
  82.      * to set FHC UART interrupt state to idle.
  83.      */
  84.     z8530_write_a(&z8530, WR0, WR0_TX_IP_RST);
  85.  
  86.     z8530_write_a(&z8530, WR1, WR1_IARCSC);     /* interrupt on all characters */
  87.  
  88.     /* 8 bits per character and enable receiver */
  89.     z8530_write_a(&z8530, WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
  90.    
  91.     z8530_write_a(&z8530, WR9, WR9_MIE);        /* Master Interrupt Enable. */
  92.    
  93.     spinlock_lock(&z8530_irq.lock);
  94.     z8530_irq.notif_cfg.notify = false;
  95.     spinlock_unlock(&z8530_irq.lock);
  96.     interrupts_restore(ipl);
  97. }
  98.  
  99. /** Resume the former IPC notification behavior. */
  100. void z8530_release(void)
  101. {
  102.     ipl_t ipl = interrupts_disable();
  103.     spinlock_lock(&z8530_irq.lock);
  104.     if (z8530_irq.notif_cfg.answerbox)
  105.         z8530_irq.notif_cfg.notify = true;
  106.     spinlock_unlock(&z8530_irq.lock);
  107.     interrupts_restore(ipl);
  108. }
  109.  
  110. /** Initialize z8530. */
  111. void z8530_init(devno_t devno, inr_t inr, uintptr_t vaddr)
  112. {
  113.     chardev_initialize("z8530_kbd", &kbrd, &ops);
  114.     stdin = &kbrd;
  115.  
  116.     z8530.devno = devno;
  117.     z8530.reg = (uint8_t *) vaddr;
  118.  
  119.     irq_initialize(&z8530_irq);
  120.     z8530_irq.devno = devno;
  121.     z8530_irq.inr = inr;
  122.     z8530_irq.claim = z8530_claim;
  123.     z8530_irq.handler = z8530_irq_handler;
  124.     irq_register(&z8530_irq);
  125.  
  126.     sysinfo_set_item_val("kbd", NULL, true);
  127.     sysinfo_set_item_val("kbd.type", NULL, KBD_Z8530);
  128.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  129.     sysinfo_set_item_val("kbd.inr", NULL, inr);
  130.     sysinfo_set_item_val("kbd.address.virtual", NULL, vaddr);
  131.  
  132.     z8530_grab();
  133. }
  134.  
  135. /** Process z8530 interrupt.
  136.  *
  137.  * @param n Interrupt vector.
  138.  * @param istate Interrupted state.
  139.  */
  140. void z8530_interrupt(void)
  141. {
  142.     z8530_poll();
  143. }
  144.  
  145. /* Called from getc(). */
  146. void z8530_resume(chardev_t *d)
  147. {
  148. }
  149.  
  150. /* Called from getc(). */
  151. void z8530_suspend(chardev_t *d)
  152. {
  153. }
  154.  
  155. char z8530_key_read(chardev_t *d)
  156. {
  157.     char ch;   
  158.  
  159.     while(!(ch = active_read_buff_read())) {
  160.         uint8_t x;
  161.         while (!(z8530_read_a(&z8530, RR0) & RR0_RCA))
  162.             ;
  163.         x = z8530_read_a(&z8530, RR8);
  164.         if (x != IGNORE_CODE) {
  165.             if (x & KEY_RELEASE)
  166.                 key_released(x ^ KEY_RELEASE);
  167.             else
  168.                 active_read_key_pressed(x);
  169.         }
  170.     }
  171.     return ch;
  172. }
  173.  
  174. /** Poll for key press and release events.
  175.  *
  176.  * This function can be used to implement keyboard polling.
  177.  */
  178. void z8530_poll(void)
  179. {
  180.     uint8_t x;
  181.  
  182.     while (z8530_read_a(&z8530, RR0) & RR0_RCA) {
  183.         x = z8530_read_a(&z8530, RR8);
  184.         if (x != IGNORE_CODE) {
  185.             if (x & KEY_RELEASE)
  186.                 key_released(x ^ KEY_RELEASE);
  187.             else
  188.                 key_pressed(x);
  189.         }
  190.     }
  191. }
  192.  
  193. irq_ownership_t z8530_claim(void)
  194. {
  195.     return (z8530_read_a(&z8530, RR0) & RR0_RCA);
  196. }
  197.  
  198. void z8530_irq_handler(irq_t *irq, void *arg, ...)
  199. {
  200.     /*
  201.      * So far, we know we got this interrupt through the FHC.
  202.      * Since we don't have enough documentation about the FHC
  203.      * and because the interrupt looks like level sensitive,
  204.      * we cannot handle it by scheduling one of the level
  205.      * interrupt traps. Process the interrupt directly.
  206.      */
  207.     if (irq->notif_cfg.notify && irq->notif_cfg.answerbox)
  208.         ipc_irq_send_notif(irq);
  209.     else
  210.         z8530_interrupt();
  211.     fhc_clear_interrupt(central_fhc, irq->inr);
  212. }
  213.  
  214. /** @}
  215.  */
  216.