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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 <arch/asm.h>
  37. #include <console/console.h>
  38. #include <console/chardev.h>
  39. #include <arch/drivers/pic.h>
  40. #include <sysinfo/sysinfo.h>
  41. #include <interrupt.h>
  42. #include <stdarg.h>
  43.  
  44. #define SPECIAL     '?'
  45.  
  46. #define PACKET_ADB  0x00
  47. #define PACKET_CUDA 0x01
  48.  
  49. #define CUDA_POWERDOWN 0x0a
  50.  
  51. #define RS 0x200
  52. #define B (0 * RS)
  53. #define A (1 * RS)
  54. #define SR (10 * RS)
  55. #define ACR (11 * RS)
  56.  
  57. #define SR_OUT 0x10
  58. #define TACK 0x10
  59. #define TIP 0x20
  60.  
  61.  
  62. static volatile __u8 *cuda = NULL;
  63.  
  64.  
  65. static char lchars[0x80] = {
  66.     'a',
  67.     's',
  68.     'd',
  69.     'f',
  70.     'h',
  71.     'g',
  72.     'z',
  73.     'x',
  74.     'c',
  75.     'v',
  76.     SPECIAL,
  77.     'b',
  78.     'q',
  79.     'w',
  80.     'e',
  81.     'r',
  82.     'y',
  83.     't',
  84.     '1',
  85.     '2',
  86.     '3',
  87.     '4',
  88.     '6',
  89.     '5',
  90.     '=',
  91.     '9',
  92.     '7',
  93.     '-',
  94.     '8',
  95.     '0',
  96.     ']',
  97.     'o',
  98.     'u',
  99.     '[',
  100.     'i',
  101.     'p',
  102.     '\n',    /* Enter */
  103.     'l',
  104.     'j',
  105.     '\'',
  106.     'k',
  107.     ';',
  108.     '\\',
  109.     ',',
  110.     '/',
  111.     'n',
  112.     'm',
  113.     '.',
  114.     '\t',    /* Tab */
  115.     ' ',
  116.     '`',
  117.     '\b',    /* Backspace */
  118.     SPECIAL,
  119.     SPECIAL, /* Escape */
  120.     SPECIAL, /* Ctrl */
  121.     SPECIAL, /* Alt */
  122.     SPECIAL, /* Shift */
  123.     SPECIAL, /* Caps-Lock */
  124.     SPECIAL, /* RAlt */
  125.     SPECIAL, /* Left */
  126.     SPECIAL, /* Right */
  127.     SPECIAL, /* Down */
  128.     SPECIAL, /* Up */
  129.     SPECIAL,
  130.     SPECIAL,
  131.     '.',     /* Keypad . */
  132.     SPECIAL,
  133.     '*',     /* Keypad * */
  134.     SPECIAL,
  135.     '+',     /* Keypad + */
  136.     SPECIAL,
  137.     SPECIAL, /* NumLock */
  138.     SPECIAL,
  139.     SPECIAL,
  140.     SPECIAL,
  141.     '/',     /* Keypad / */
  142.     '\n',    /* Keypad Enter */
  143.     SPECIAL,
  144.     '-',     /* Keypad - */
  145.     SPECIAL,
  146.     SPECIAL,
  147.     SPECIAL,
  148.     '0',     /* Keypad 0 */
  149.     '1',     /* Keypad 1 */
  150.     '2',     /* Keypad 2 */
  151.     '3',     /* Keypad 3 */
  152.     '4',     /* Keypad 4 */
  153.     '5',     /* Keypad 5 */
  154.     '6',     /* Keypad 6 */
  155.     '7',     /* Keypad 7 */
  156.     SPECIAL,
  157.     '8',     /* Keypad 8 */
  158.     '9',     /* Keypad 9 */
  159.     SPECIAL,
  160.     SPECIAL,
  161.     SPECIAL,
  162.     SPECIAL, /* F5 */
  163.     SPECIAL, /* F6 */
  164.     SPECIAL, /* F7 */
  165.     SPECIAL, /* F3 */
  166.     SPECIAL, /* F8 */
  167.     SPECIAL, /* F9 */
  168.     SPECIAL,
  169.     SPECIAL, /* F11 */
  170.     SPECIAL,
  171.     SPECIAL, /* F13 */
  172.     SPECIAL,
  173.     SPECIAL, /* ScrollLock */
  174.     SPECIAL,
  175.     SPECIAL, /* F10 */
  176.     SPECIAL,
  177.     SPECIAL, /* F12 */
  178.     SPECIAL,
  179.     SPECIAL, /* Pause */
  180.     SPECIAL, /* Insert */
  181.     SPECIAL, /* Home */
  182.     SPECIAL, /* PageUp */
  183.     SPECIAL, /* Delete */
  184.     SPECIAL, /* F4 */
  185.     SPECIAL, /* End */
  186.     SPECIAL, /* F2 */
  187.     SPECIAL, /* PageDown */
  188.     SPECIAL  /* F1 */
  189. };
  190.  
  191.  
  192. void send_packet(const __u8 kind, index_t count, ...);
  193.  
  194.  
  195. static void receive_packet(__u8 *kind, index_t count, __u8 data[])
  196. {
  197.     cuda[B] = cuda[B] & ~TIP;
  198.     *kind = cuda[SR];
  199.    
  200.     index_t i;
  201.     for (i = 0; i < count; i++)
  202.         data[i] = cuda[SR];
  203.    
  204.     cuda[B] = cuda[B] | TIP;
  205. }
  206.  
  207.  
  208. /* Called from getc(). */
  209. static void cuda_resume(chardev_t *d)
  210. {
  211. }
  212.  
  213.  
  214. /* Called from getc(). */
  215. static void cuda_suspend(chardev_t *d)
  216. {
  217. }
  218.  
  219.  
  220. static char key_read(chardev_t *d)
  221. {
  222.     char ch;
  223.    
  224.     ch = 0;
  225.     return ch;
  226. }
  227.  
  228.  
  229. static chardev_t kbrd;
  230. static chardev_operations_t ops = {
  231.     .suspend = cuda_suspend,
  232.     .resume = cuda_resume,
  233.     .read = key_read
  234. };
  235.  
  236.  
  237. int cuda_get_scancode(void)
  238. {
  239.     __u8 kind;
  240.     __u8 data[4];
  241.    
  242.     receive_packet(&kind, 4, data);
  243.    
  244.     if ((kind == PACKET_ADB) && (data[0] == 0x40) && (data[1] == 0x2c))
  245.         return data[2];
  246.    
  247.     return -1;
  248. }
  249.  
  250. static void cuda_irq(int n, istate_t *istate)
  251. {
  252.     int scan_code = cuda_get_scancode();
  253.    
  254.     if (scan_code != -1) {
  255.         __u8 scancode = (__u8) scan_code;
  256.         if ((scancode & 0x80) != 0x80)
  257.             chardev_push_character(&kbrd, lchars[scancode & 0x7f]);
  258.     }
  259. }
  260.  
  261.  
  262. void cuda_init(__address base, size_t size)
  263. {
  264.     cuda = (__u8 *) hw_map(base, size);
  265.    
  266.     int_register(CUDA_IRQ, "cuda", cuda_irq);
  267.     pic_enable_interrupt(CUDA_IRQ);
  268.    
  269.     chardev_initialize("cuda_kbd", &kbrd, &ops);
  270.     stdin = &kbrd;
  271.    
  272.     sysinfo_set_item_val("cuda", NULL, true);
  273.     sysinfo_set_item_val("cuda.irq", NULL, CUDA_IRQ);
  274. }
  275.  
  276.  
  277. void send_packet(const __u8 kind, index_t count, ...)
  278. {
  279.     index_t i;
  280.     va_list va;
  281.    
  282.     cuda[B] = cuda[B] | TIP;
  283.     cuda[ACR] = cuda[ACR] | SR_OUT;
  284.     cuda[SR] = kind;
  285.     cuda[B] = cuda[B] & ~TIP;
  286.    
  287.     va_start(va, count);
  288.    
  289.     for (i = 0; i < count; i++) {
  290.         cuda[ACR] = cuda[ACR] | SR_OUT;
  291.         cuda[SR] = va_arg(va, int);
  292.         cuda[B] = cuda[B] | TACK;
  293.     }
  294.    
  295.     va_end(va);
  296.    
  297.     cuda[B] = cuda[B] | TIP;
  298. }
  299.  
  300.  
  301. void cpu_halt(void) {
  302. #ifdef CONFIG_POWEROFF
  303.     send_packet(PACKET_CUDA, 1, CUDA_POWERDOWN);
  304. #endif
  305.     asm volatile (
  306.         "b 0\n"
  307.     );
  308. }
  309.  
  310.  /** @}
  311.  */
  312.  
  313.