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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. #include <arch/drivers/cuda.h>
  30. #include <arch/asm.h>
  31. #include <console/console.h>
  32. #include <console/chardev.h>
  33. #include <arch/drivers/pic.h>
  34. #include <sysinfo/sysinfo.h>
  35. #include <interrupt.h>
  36. #include <stdarg.h>
  37.  
  38. #define SPECIAL     '?'
  39.  
  40. #define PACKET_ADB  0x00
  41. #define PACKET_CUDA 0x01
  42.  
  43. #define CUDA_POWERDOWN 0x0a
  44.  
  45. #define RS 0x200
  46. #define B (0 * RS)
  47. #define A (1 * RS)
  48. #define SR (10 * RS)
  49. #define ACR (11 * RS)
  50.  
  51. #define SR_OUT 0x10
  52. #define TACK 0x10
  53. #define TIP 0x20
  54.  
  55.  
  56. static volatile __u8 *cuda = NULL;
  57.  
  58.  
  59. static char lchars[0x80] = {
  60.     'a',
  61.     's',
  62.     'd',
  63.     'f',
  64.     'h',
  65.     'g',
  66.     'z',
  67.     'x',
  68.     'c',
  69.     'v',
  70.     SPECIAL,
  71.     'b',
  72.     'q',
  73.     'w',
  74.     'e',
  75.     'r',
  76.     'y',
  77.     't',
  78.     '1',
  79.     '2',
  80.     '3',
  81.     '4',
  82.     '6',
  83.     '5',
  84.     '=',
  85.     '9',
  86.     '7',
  87.     '-',
  88.     '8',
  89.     '0',
  90.     ']',
  91.     'o',
  92.     'u',
  93.     '[',
  94.     'i',
  95.     'p',
  96.     '\n',    /* Enter */
  97.     'l',
  98.     'j',
  99.     '\'',
  100.     'k',
  101.     ';',
  102.     '\\',
  103.     ',',
  104.     '/',
  105.     'n',
  106.     'm',
  107.     '.',
  108.     '\t',    /* Tab */
  109.     ' ',
  110.     '`',
  111.     '\b',    /* Backspace */
  112.     SPECIAL,
  113.     SPECIAL, /* Escape */
  114.     SPECIAL, /* Ctrl */
  115.     SPECIAL, /* Alt */
  116.     SPECIAL, /* Shift */
  117.     SPECIAL, /* Caps-Lock */
  118.     SPECIAL, /* RAlt */
  119.     SPECIAL, /* Left */
  120.     SPECIAL, /* Right */
  121.     SPECIAL, /* Down */
  122.     SPECIAL, /* Up */
  123.     SPECIAL,
  124.     SPECIAL,
  125.     '.',     /* Keypad . */
  126.     SPECIAL,
  127.     '*',     /* Keypad * */
  128.     SPECIAL,
  129.     '+',     /* Keypad + */
  130.     SPECIAL,
  131.     SPECIAL, /* NumLock */
  132.     SPECIAL,
  133.     SPECIAL,
  134.     SPECIAL,
  135.     '/',     /* Keypad / */
  136.     '\n',    /* Keypad Enter */
  137.     SPECIAL,
  138.     '-',     /* Keypad - */
  139.     SPECIAL,
  140.     SPECIAL,
  141.     SPECIAL,
  142.     '0',     /* Keypad 0 */
  143.     '1',     /* Keypad 1 */
  144.     '2',     /* Keypad 2 */
  145.     '3',     /* Keypad 3 */
  146.     '4',     /* Keypad 4 */
  147.     '5',     /* Keypad 5 */
  148.     '6',     /* Keypad 6 */
  149.     '7',     /* Keypad 7 */
  150.     SPECIAL,
  151.     '8',     /* Keypad 8 */
  152.     '9',     /* Keypad 9 */
  153.     SPECIAL,
  154.     SPECIAL,
  155.     SPECIAL,
  156.     SPECIAL, /* F5 */
  157.     SPECIAL, /* F6 */
  158.     SPECIAL, /* F7 */
  159.     SPECIAL, /* F3 */
  160.     SPECIAL, /* F8 */
  161.     SPECIAL, /* F9 */
  162.     SPECIAL,
  163.     SPECIAL, /* F11 */
  164.     SPECIAL,
  165.     SPECIAL, /* F13 */
  166.     SPECIAL,
  167.     SPECIAL, /* ScrollLock */
  168.     SPECIAL,
  169.     SPECIAL, /* F10 */
  170.     SPECIAL,
  171.     SPECIAL, /* F12 */
  172.     SPECIAL,
  173.     SPECIAL, /* Pause */
  174.     SPECIAL, /* Insert */
  175.     SPECIAL, /* Home */
  176.     SPECIAL, /* PageUp */
  177.     SPECIAL, /* Delete */
  178.     SPECIAL, /* F4 */
  179.     SPECIAL, /* End */
  180.     SPECIAL, /* F2 */
  181.     SPECIAL, /* PageDown */
  182.     SPECIAL  /* F1 */
  183. };
  184.  
  185.  
  186. void send_packet(const __u8 kind, index_t count, ...);
  187.  
  188.  
  189. static void receive_packet(__u8 *kind, index_t count, __u8 data[])
  190. {
  191.     cuda[B] = cuda[B] & ~TIP;
  192.     *kind = cuda[SR];
  193.    
  194.     index_t i;
  195.     for (i = 0; i < count; i++)
  196.         data[i] = cuda[SR];
  197.    
  198.     cuda[B] = cuda[B] | TIP;
  199. }
  200.  
  201.  
  202. /* Called from getc(). */
  203. static void cuda_resume(chardev_t *d)
  204. {
  205. }
  206.  
  207.  
  208. /* Called from getc(). */
  209. static void cuda_suspend(chardev_t *d)
  210. {
  211. }
  212.  
  213.  
  214. static char key_read(chardev_t *d)
  215. {
  216.     char ch;
  217.    
  218.     ch = 0;
  219.     return ch;
  220. }
  221.  
  222.  
  223. static chardev_t kbrd;
  224. static chardev_operations_t ops = {
  225.     .suspend = cuda_suspend,
  226.     .resume = cuda_resume,
  227.     .read = key_read
  228. };
  229.  
  230.  
  231. int cuda_get_scancode(void)
  232. {
  233.     __u8 kind;
  234.     __u8 data[4];
  235.    
  236.     receive_packet(&kind, 4, data);
  237.    
  238.     if ((kind == PACKET_ADB) && (data[0] == 0x40) && (data[1] == 0x2c))
  239.         return data[2];
  240.    
  241.     return -1;
  242. }
  243.  
  244. static void cuda_irq(int n, istate_t *istate)
  245. {
  246.     int scan_code = cuda_get_scancode();
  247.    
  248.     if (scan_code != -1) {
  249.         __u8 scancode = (__u8) scan_code;
  250.         if ((scancode & 0x80) != 0x80)
  251.             chardev_push_character(&kbrd, lchars[scancode & 0x7f]);
  252.     }
  253. }
  254.  
  255.  
  256. void cuda_init(__address base, size_t size)
  257. {
  258.     cuda = (__u8 *) hw_map(base, size);
  259.    
  260.     int_register(CUDA_IRQ, "cuda", cuda_irq);
  261.     pic_enable_interrupt(CUDA_IRQ);
  262.    
  263.     chardev_initialize("cuda_kbd", &kbrd, &ops);
  264.     stdin = &kbrd;
  265.    
  266.     sysinfo_set_item_val("cuda", NULL, true);
  267.     sysinfo_set_item_val("cuda.irq", NULL, CUDA_IRQ);
  268. }
  269.  
  270.  
  271. void send_packet(const __u8 kind, index_t count, ...)
  272. {
  273.     index_t i;
  274.     va_list va;
  275.    
  276.     cuda[B] = cuda[B] | TIP;
  277.     cuda[ACR] = cuda[ACR] | SR_OUT;
  278.     cuda[SR] = kind;
  279.     cuda[B] = cuda[B] & ~TIP;
  280.    
  281.     va_start(va, count);
  282.    
  283.     for (i = 0; i < count; i++) {
  284.         cuda[ACR] = cuda[ACR] | SR_OUT;
  285.         cuda[SR] = va_arg(va, int);
  286.         cuda[B] = cuda[B] | TACK;
  287.     }
  288.    
  289.     va_end(va);
  290.    
  291.     cuda[B] = cuda[B] | TIP;
  292. }
  293.  
  294.  
  295. void cpu_halt(void) {
  296. #ifdef CONFIG_POWEROFF
  297.     send_packet(PACKET_CUDA, 1, CUDA_POWERDOWN);
  298. #endif
  299.     asm volatile (
  300.         "b 0\n"
  301.     );
  302. }
  303.