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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 CUDA_IRQ 10
  45. #define SPECIAL     '?'
  46.  
  47. #define PACKET_ADB  0x00
  48. #define PACKET_CUDA 0x01
  49.  
  50. #define CUDA_POWERDOWN  0x0a
  51. #define CUDA_RESET      0x11
  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. static void receive_packet(uint8_t *kind, index_t count, uint8_t data[])
  195. {
  196.     cuda[B] = cuda[B] & ~TIP;
  197.     *kind = cuda[SR];
  198.    
  199.     index_t i;
  200.     for (i = 0; i < count; i++)
  201.         data[i] = cuda[SR];
  202.    
  203.     cuda[B] = cuda[B] | TIP;
  204. }
  205.  
  206.  
  207. /* Called from getc(). */
  208. static void cuda_resume(chardev_t *d)
  209. {
  210. }
  211.  
  212.  
  213. /* Called from getc(). */
  214. static void cuda_suspend(chardev_t *d)
  215. {
  216. }
  217.  
  218.  
  219. static char key_read(chardev_t *d)
  220. {
  221.     char ch;
  222.    
  223.     ch = 0;
  224.     return ch;
  225. }
  226.  
  227.  
  228. static chardev_t kbrd;
  229. static chardev_operations_t ops = {
  230.     .suspend = cuda_suspend,
  231.     .resume = cuda_resume,
  232.     .read = key_read
  233. };
  234.  
  235.  
  236. int cuda_get_scancode(void)
  237. {
  238.     if (cuda) {
  239.         uint8_t kind;
  240.         uint8_t 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.    
  248.     return -1;
  249. }
  250.  
  251. static void cuda_irq_handler(irq_t *irq)
  252. {
  253.     int scan_code = cuda_get_scancode();
  254.        
  255.     if (scan_code != -1) {
  256.         uint8_t scancode = (uint8_t) scan_code;
  257.         if ((scancode & 0x80) != 0x80)
  258.             chardev_push_character(&kbrd, lchars[scancode & 0x7f]);
  259.     }
  260. }
  261.  
  262. static irq_ownership_t cuda_claim(irq_t *irq)
  263. {
  264.     return IRQ_ACCEPT;
  265. }
  266.  
  267. void cuda_init(devno_t devno, uintptr_t base, size_t size)
  268. {
  269.     cuda = (uint8_t *) hw_map(base, size);
  270.    
  271.     chardev_initialize("cuda_kbd", &kbrd, &ops);
  272.     stdin = &kbrd;
  273.    
  274.     irq_initialize(&cuda_irq);
  275.     cuda_irq.devno = devno;
  276.     cuda_irq.inr = CUDA_IRQ;
  277.     cuda_irq.claim = cuda_claim;
  278.     cuda_irq.handler = cuda_irq_handler;
  279.     irq_register(&cuda_irq);
  280.    
  281.     pic_enable_interrupt(CUDA_IRQ);
  282.    
  283.     sysinfo_set_item_val("kbd", NULL, true);
  284.     sysinfo_set_item_val("kbd.devno", NULL, devno);
  285.     sysinfo_set_item_val("kbd.inr", NULL, CUDA_IRQ);
  286.     sysinfo_set_item_val("kbd.address.virtual", NULL, base);
  287. }
  288.  
  289.  
  290. static void send_packet(const uint8_t kind, count_t count, ...)
  291. {
  292.     index_t i;
  293.     va_list va;
  294.    
  295.     cuda[B] = cuda[B] | TIP;
  296.     cuda[ACR] = cuda[ACR] | SR_OUT;
  297.     cuda[SR] = kind;
  298.     cuda[B] = cuda[B] & ~TIP;
  299.    
  300.     va_start(va, count);
  301.    
  302.     for (i = 0; i < count; i++) {
  303.         cuda[ACR] = cuda[ACR] | SR_OUT;
  304.         cuda[SR] = va_arg(va, int);
  305.         cuda[B] = cuda[B] | TACK;
  306.     }
  307.    
  308.     va_end(va);
  309.    
  310.     cuda[B] = cuda[B] | TIP;
  311. }
  312.  
  313.  
  314. void cpu_halt(void) {
  315.     asm volatile (
  316.         "b 0\n"
  317.     );
  318. }
  319.  
  320. void arch_reboot(void) {
  321.     if (cuda)
  322.         send_packet(PACKET_CUDA, 1, CUDA_RESET);
  323.    
  324.     asm volatile (
  325.         "b 0\n"
  326.     );
  327. }
  328.  
  329. /** @}
  330.  */
  331.