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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. static iroutine vector;
  64.  
  65.  
  66. static char lchars[0x80] = {
  67.     'a',
  68.     's',
  69.     'd',
  70.     'f',
  71.     'h',
  72.     'g',
  73.     'z',
  74.     'x',
  75.     'c',
  76.     'v',
  77.     SPECIAL,
  78.     'b',
  79.     'q',
  80.     'w',
  81.     'e',
  82.     'r',
  83.     'y',
  84.     't',
  85.     '1',
  86.     '2',
  87.     '3',
  88.     '4',
  89.     '6',
  90.     '5',
  91.     '=',
  92.     '9',
  93.     '7',
  94.     '-',
  95.     '8',
  96.     '0',
  97.     ']',
  98.     'o',
  99.     'u',
  100.     '[',
  101.     'i',
  102.     'p',
  103.     '\n',    /* Enter */
  104.     'l',
  105.     'j',
  106.     '\'',
  107.     'k',
  108.     ';',
  109.     '\\',
  110.     ',',
  111.     '/',
  112.     'n',
  113.     'm',
  114.     '.',
  115.     '\t',    /* Tab */
  116.     ' ',
  117.     '`',
  118.     '\b',    /* Backspace */
  119.     SPECIAL,
  120.     SPECIAL, /* Escape */
  121.     SPECIAL, /* Ctrl */
  122.     SPECIAL, /* Alt */
  123.     SPECIAL, /* Shift */
  124.     SPECIAL, /* Caps-Lock */
  125.     SPECIAL, /* RAlt */
  126.     SPECIAL, /* Left */
  127.     SPECIAL, /* Right */
  128.     SPECIAL, /* Down */
  129.     SPECIAL, /* Up */
  130.     SPECIAL,
  131.     SPECIAL,
  132.     '.',     /* Keypad . */
  133.     SPECIAL,
  134.     '*',     /* Keypad * */
  135.     SPECIAL,
  136.     '+',     /* Keypad + */
  137.     SPECIAL,
  138.     SPECIAL, /* NumLock */
  139.     SPECIAL,
  140.     SPECIAL,
  141.     SPECIAL,
  142.     '/',     /* Keypad / */
  143.     '\n',    /* Keypad Enter */
  144.     SPECIAL,
  145.     '-',     /* Keypad - */
  146.     SPECIAL,
  147.     SPECIAL,
  148.     SPECIAL,
  149.     '0',     /* Keypad 0 */
  150.     '1',     /* Keypad 1 */
  151.     '2',     /* Keypad 2 */
  152.     '3',     /* Keypad 3 */
  153.     '4',     /* Keypad 4 */
  154.     '5',     /* Keypad 5 */
  155.     '6',     /* Keypad 6 */
  156.     '7',     /* Keypad 7 */
  157.     SPECIAL,
  158.     '8',     /* Keypad 8 */
  159.     '9',     /* Keypad 9 */
  160.     SPECIAL,
  161.     SPECIAL,
  162.     SPECIAL,
  163.     SPECIAL, /* F5 */
  164.     SPECIAL, /* F6 */
  165.     SPECIAL, /* F7 */
  166.     SPECIAL, /* F3 */
  167.     SPECIAL, /* F8 */
  168.     SPECIAL, /* F9 */
  169.     SPECIAL,
  170.     SPECIAL, /* F11 */
  171.     SPECIAL,
  172.     SPECIAL, /* F13 */
  173.     SPECIAL,
  174.     SPECIAL, /* ScrollLock */
  175.     SPECIAL,
  176.     SPECIAL, /* F10 */
  177.     SPECIAL,
  178.     SPECIAL, /* F12 */
  179.     SPECIAL,
  180.     SPECIAL, /* Pause */
  181.     SPECIAL, /* Insert */
  182.     SPECIAL, /* Home */
  183.     SPECIAL, /* PageUp */
  184.     SPECIAL, /* Delete */
  185.     SPECIAL, /* F4 */
  186.     SPECIAL, /* End */
  187.     SPECIAL, /* F2 */
  188.     SPECIAL, /* PageDown */
  189.     SPECIAL  /* F1 */
  190. };
  191.  
  192.  
  193. void send_packet(const __u8 kind, index_t count, ...);
  194.  
  195.  
  196. static void receive_packet(__u8 *kind, index_t count, __u8 data[])
  197. {
  198.     cuda[B] = cuda[B] & ~TIP;
  199.     *kind = cuda[SR];
  200.    
  201.     index_t i;
  202.     for (i = 0; i < count; i++)
  203.         data[i] = cuda[SR];
  204.    
  205.     cuda[B] = cuda[B] | TIP;
  206. }
  207.  
  208.  
  209. /* Called from getc(). */
  210. static void cuda_resume(chardev_t *d)
  211. {
  212. }
  213.  
  214.  
  215. /* Called from getc(). */
  216. static void cuda_suspend(chardev_t *d)
  217. {
  218. }
  219.  
  220.  
  221. static char key_read(chardev_t *d)
  222. {
  223.     char ch;
  224.    
  225.     ch = 0;
  226.     return ch;
  227. }
  228.  
  229.  
  230. static chardev_t kbrd;
  231. static chardev_operations_t ops = {
  232.     .suspend = cuda_suspend,
  233.     .resume = cuda_resume,
  234.     .read = key_read
  235. };
  236.  
  237.  
  238. int cuda_get_scancode(void)
  239. {
  240.     __u8 kind;
  241.     __u8 data[4];
  242.    
  243.     receive_packet(&kind, 4, data);
  244.    
  245.     if ((kind == PACKET_ADB) && (data[0] == 0x40) && (data[1] == 0x2c))
  246.         return data[2];
  247.    
  248.     return -1;
  249. }
  250.  
  251. static void cuda_irq(int n, istate_t *istate)
  252. {
  253.     int scan_code = cuda_get_scancode();
  254.    
  255.     if (scan_code != -1) {
  256.         __u8 scancode = (__u8) scan_code;
  257.         if ((scancode & 0x80) != 0x80)
  258.             chardev_push_character(&kbrd, lchars[scancode & 0x7f]);
  259.     }
  260. }
  261.  
  262.  
  263. /** Initialize keyboard and service interrupts using kernel routine */
  264. void cuda_grab(void)
  265. {
  266.     vector = int_register(CUDA_IRQ, "cuda", cuda_irq);
  267. }
  268.  
  269.  
  270. /** Resume the former interrupt vector */
  271. void cuda_release(void)
  272. {
  273.     if (vector)
  274.         int_register(CUDA_IRQ, "user_interrupt", vector);
  275. }
  276.  
  277.  
  278. void cuda_init(__address base, size_t size)
  279. {
  280.     cuda = (__u8 *) hw_map(base, size);
  281.    
  282.     int_register(CUDA_IRQ, "cuda", cuda_irq);
  283.     pic_enable_interrupt(CUDA_IRQ);
  284.    
  285.     chardev_initialize("cuda_kbd", &kbrd, &ops);
  286.     stdin = &kbrd;
  287.    
  288.     sysinfo_set_item_val("cuda", NULL, true);
  289.     sysinfo_set_item_val("cuda.irq", NULL, CUDA_IRQ);
  290. }
  291.  
  292.  
  293. void send_packet(const __u8 kind, index_t count, ...)
  294. {
  295.     index_t i;
  296.     va_list va;
  297.    
  298.     cuda[B] = cuda[B] | TIP;
  299.     cuda[ACR] = cuda[ACR] | SR_OUT;
  300.     cuda[SR] = kind;
  301.     cuda[B] = cuda[B] & ~TIP;
  302.    
  303.     va_start(va, count);
  304.    
  305.     for (i = 0; i < count; i++) {
  306.         cuda[ACR] = cuda[ACR] | SR_OUT;
  307.         cuda[SR] = va_arg(va, int);
  308.         cuda[B] = cuda[B] | TACK;
  309.     }
  310.    
  311.     va_end(va);
  312.    
  313.     cuda[B] = cuda[B] | TIP;
  314. }
  315.  
  316.  
  317. void cpu_halt(void) {
  318. #ifdef CONFIG_POWEROFF
  319.     send_packet(PACKET_CUDA, 1, CUDA_POWERDOWN);
  320. #endif
  321.     asm volatile (
  322.         "b 0\n"
  323.     );
  324. }
  325.  
  326. /** @}
  327.  */
  328.