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  1. /*
  2.  * Copyright (c) 2006 Martin Decky
  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 ppc32  
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/drivers/cuda.h>
  36. #include <ddi/irq.h>
  37. #include <arch/asm.h>
  38. #include <console/console.h>
  39. #include <console/chardev.h>
  40. #include <arch/drivers/pic.h>
  41. #include <sysinfo/sysinfo.h>
  42. #include <interrupt.h>
  43. #include <stdarg.h>
  44.  
  45. #define CUDA_IRQ 10
  46. #define SPECIAL     '?'
  47.  
  48. #define PACKET_ADB  0x00
  49. #define PACKET_CUDA 0x01
  50.  
  51. #define CUDA_POWERDOWN 0x0a
  52.  
  53. #define RS 0x200
  54. #define B (0 * RS)
  55. #define A (1 * RS)
  56. #define SR (10 * RS)
  57. #define ACR (11 * RS)
  58.  
  59. #define SR_OUT 0x10
  60. #define TACK 0x10
  61. #define TIP 0x20
  62.  
  63.  
  64. static volatile uint8_t *cuda = NULL;
  65. static irq_t cuda_irq;      /**< Cuda's IRQ. */
  66.  
  67. static char lchars[0x80] = {
  68.     'a',
  69.     's',
  70.     'd',
  71.     'f',
  72.     'h',
  73.     'g',
  74.     'z',
  75.     'x',
  76.     'c',
  77.     'v',
  78.     SPECIAL,
  79.     'b',
  80.     'q',
  81.     'w',
  82.     'e',
  83.     'r',
  84.     'y',
  85.     't',
  86.     '1',
  87.     '2',
  88.     '3',
  89.     '4',
  90.     '6',
  91.     '5',
  92.     '=',
  93.     '9',
  94.     '7',
  95.     '-',
  96.     '8',
  97.     '0',
  98.     ']',
  99.     'o',
  100.     'u',
  101.     '[',
  102.     'i',
  103.     'p',
  104.     '\n',    /* Enter */
  105.     'l',
  106.     'j',
  107.     '\'',
  108.     'k',
  109.     ';',
  110.     '\\',
  111.     ',',
  112.     '/',
  113.     'n',
  114.     'm',
  115.     '.',
  116.     '\t',    /* Tab */
  117.     ' ',
  118.     '`',
  119.     '\b',    /* Backspace */
  120.     SPECIAL,
  121.     SPECIAL, /* Escape */
  122.     SPECIAL, /* Ctrl */
  123.     SPECIAL, /* Alt */
  124.     SPECIAL, /* Shift */
  125.     SPECIAL, /* Caps-Lock */
  126.     SPECIAL, /* RAlt */
  127.     SPECIAL, /* Left */
  128.     SPECIAL, /* Right */
  129.     SPECIAL, /* Down */
  130.     SPECIAL, /* Up */
  131.     SPECIAL,
  132.     SPECIAL,
  133.     '.',     /* Keypad . */
  134.     SPECIAL,
  135.     '*',     /* Keypad * */
  136.     SPECIAL,
  137.     '+',     /* Keypad + */
  138.     SPECIAL,
  139.     SPECIAL, /* NumLock */
  140.     SPECIAL,
  141.     SPECIAL,
  142.     SPECIAL,
  143.     '/',     /* Keypad / */
  144.     '\n',    /* Keypad Enter */
  145.     SPECIAL,
  146.     '-',     /* Keypad - */
  147.     SPECIAL,
  148.     SPECIAL,
  149.     SPECIAL,
  150.     '0',     /* Keypad 0 */
  151.     '1',     /* Keypad 1 */
  152.     '2',     /* Keypad 2 */
  153.     '3',     /* Keypad 3 */
  154.     '4',     /* Keypad 4 */
  155.     '5',     /* Keypad 5 */
  156.     '6',     /* Keypad 6 */
  157.     '7',     /* Keypad 7 */
  158.     SPECIAL,
  159.     '8',     /* Keypad 8 */
  160.     '9',     /* Keypad 9 */
  161.     SPECIAL,
  162.     SPECIAL,
  163.     SPECIAL,
  164.     SPECIAL, /* F5 */
  165.     SPECIAL, /* F6 */
  166.     SPECIAL, /* F7 */
  167.     SPECIAL, /* F3 */
  168.     SPECIAL, /* F8 */
  169.     SPECIAL, /* F9 */
  170.     SPECIAL,
  171.     SPECIAL, /* F11 */
  172.     SPECIAL,
  173.     SPECIAL, /* F13 */
  174.     SPECIAL,
  175.     SPECIAL, /* ScrollLock */
  176.     SPECIAL,
  177.     SPECIAL, /* F10 */
  178.     SPECIAL,
  179.     SPECIAL, /* F12 */
  180.     SPECIAL,
  181.     SPECIAL, /* Pause */
  182.     SPECIAL, /* Insert */
  183.     SPECIAL, /* Home */
  184.     SPECIAL, /* PageUp */
  185.     SPECIAL, /* Delete */
  186.     SPECIAL, /* F4 */
  187.     SPECIAL, /* End */
  188.     SPECIAL, /* F2 */
  189.     SPECIAL, /* PageDown */
  190.     SPECIAL  /* F1 */
  191. };
  192.  
  193.  
  194. void send_packet(const uint8_t kind, index_t count, ...);
  195.  
  196.  
  197. static void receive_packet(uint8_t *kind, index_t count, uint8_t data[])
  198. {
  199.     cuda[B] = cuda[B] & ~TIP;
  200.     *kind = cuda[SR];
  201.    
  202.     index_t i;
  203.     for (i = 0; i < count; i++)
  204.         data[i] = cuda[SR];
  205.    
  206.     cuda[B] = cuda[B] | TIP;
  207. }
  208.  
  209.  
  210. /* Called from getc(). */
  211. static void cuda_resume(chardev_t *d)
  212. {
  213. }
  214.  
  215.  
  216. /* Called from getc(). */
  217. static void cuda_suspend(chardev_t *d)
  218. {
  219. }
  220.  
  221.  
  222. static char key_read(chardev_t *d)
  223. {
  224.     char ch;
  225.    
  226.     ch = 0;
  227.     return ch;
  228. }
  229.  
  230.  
  231. static chardev_t kbrd;
  232. static chardev_operations_t ops = {
  233.     .suspend = cuda_suspend,
  234.     .resume = cuda_resume,
  235.     .read = key_read
  236. };
  237.  
  238.  
  239. int cuda_get_scancode(void)
  240. {
  241.     uint8_t kind;
  242.     uint8_t data[4];
  243.    
  244.     receive_packet(&kind, 4, data);
  245.    
  246.     if ((kind == PACKET_ADB) && (data[0] == 0x40) && (data[1] == 0x2c))
  247.         return data[2];
  248.    
  249.     return -1;
  250. }
  251.  
  252. static void cuda_irq_handler(irq_t *irq, void *arg, ...)
  253. {
  254.     if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox))
  255.         ipc_irq_send_notif(irq);
  256.     else {
  257.         int scan_code = cuda_get_scancode();
  258.        
  259.         if (scan_code != -1) {
  260.             uint8_t scancode = (uint8_t) scan_code;
  261.             if ((scancode & 0x80) != 0x80)
  262.                 chardev_push_character(&kbrd, lchars[scancode & 0x7f]);
  263.         }
  264.     }
  265. }
  266.  
  267. static irq_ownership_t cuda_claim(void)
  268. {
  269.     return IRQ_ACCEPT;
  270. }
  271.  
  272.  
  273. /** Initialize keyboard and service interrupts using kernel routine */
  274. void cuda_grab(void)
  275. {
  276.     ipl_t ipl = interrupts_disable();
  277.     spinlock_lock(&cuda_irq.lock);
  278.     cuda_irq.notif_cfg.notify = false;
  279.     spinlock_unlock(&cuda_irq.lock);
  280.     interrupts_restore(ipl);
  281. }
  282.  
  283.  
  284. /** Resume the former interrupt vector */
  285. void cuda_release(void)
  286. {
  287.     ipl_t ipl = interrupts_disable();
  288.     spinlock_lock(&cuda_irq.lock);
  289.     if (cuda_irq.notif_cfg.answerbox)
  290.         cuda_irq.notif_cfg.notify = true;
  291.     spinlock_unlock(&cuda_irq.unlock);
  292.     interrupts_restore(ipl);
  293. }
  294.  
  295.  
  296. void cuda_init(devno_t devno, uintptr_t base, size_t size)
  297. {
  298.     cuda = (uint8_t *) hw_map(base, size); 
  299.    
  300.     chardev_initialize("cuda_kbd", &kbrd, &ops);
  301.     stdin = &kbrd;
  302.    
  303.     irq_initialize(&cuda_irq);
  304.     cuda_irq.devno = devno;
  305.     cuda_irq.inr = CUDA_IRQ;
  306.     cuda_irq.claim = cuda_claim;
  307.     cuda_irq.handler = cuda_irq_handler;
  308.     irq_register(&cuda_irq);
  309.    
  310.     pic_enable_interrupt(CUDA_IRQ);
  311.  
  312.     sysinfo_set_item_val("kbd", NULL, true);
  313.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  314.     sysinfo_set_item_val("kbd.inr", NULL, CUDA_IRQ);
  315.     sysinfo_set_item_val("kbd.address.virtual", NULL, base);
  316. }
  317.  
  318.  
  319. void send_packet(const uint8_t kind, index_t count, ...)
  320. {
  321.     index_t i;
  322.     va_list va;
  323.    
  324.     cuda[B] = cuda[B] | TIP;
  325.     cuda[ACR] = cuda[ACR] | SR_OUT;
  326.     cuda[SR] = kind;
  327.     cuda[B] = cuda[B] & ~TIP;
  328.    
  329.     va_start(va, count);
  330.    
  331.     for (i = 0; i < count; i++) {
  332.         cuda[ACR] = cuda[ACR] | SR_OUT;
  333.         cuda[SR] = va_arg(va, int);
  334.         cuda[B] = cuda[B] | TACK;
  335.     }
  336.    
  337.     va_end(va);
  338.    
  339.     cuda[B] = cuda[B] | TIP;
  340. }
  341.  
  342.  
  343. void cpu_halt(void) {
  344. #ifdef CONFIG_POWEROFF
  345.     send_packet(PACKET_CUDA, 1, CUDA_POWERDOWN);
  346. #endif
  347.     asm volatile (
  348.         "b 0\n"
  349.     );
  350. }
  351.  
  352. /** @}
  353.  */
  354.