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ktti.c
Package: linux-2.4.20.tar.gz　[view]
Upload User: jlfgdled
Upload Date: 2013-04-10
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Code Size: 3k
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Linux-Unix program

Development Platform:

Unix_Linux

ktti.c：Code Content
  1. /* 
  2.         ktti.c        (c) 1998  Grant R. Guenther <grant@torque.net>
  3.                           Under the terms of the GNU General Public License.
  5. ktti.c is a low-level protocol driver for the KT Technology
  6. parallel port adapter.  This adapter is used in the "PHd" 
  7.         portable hard-drives.  As far as I can tell, this device
  8. supports 4-bit mode _only_.  
  10. */
  12. #define KTTI_VERSION      "1.0"
  14. #include <linux/module.h>
  15. #include <linux/delay.h>
  16. #include <linux/kernel.h>
  17. #include <linux/types.h>
  18. #include <linux/wait.h>
  19. #include <asm/io.h>
  21. #include "paride.h"
  23. #define j44(a,b)                (((a>>4)&0x0f)|(b&0xf0))
  25. /* cont = 0 - access the IDE register file 
  26.    cont = 1 - access the IDE command set 
  27. */
  29. static int  cont_map[2] = { 0x10, 0x08 };
  31. static void  ktti_write_regr( PIA *pi, int cont, int regr, int val)
  33. { int r;
  35. r = regr + cont_map[cont];
  37. w0(r); w2(0xb); w2(0xa); w2(3); w2(6); 
  38. w0(val); w2(3); w0(0); w2(6); w2(0xb);
  39. }
  41. static int ktti_read_regr( PIA *pi, int cont, int regr )
  43. { int  a, b, r;
  45.         r = regr + cont_map[cont];
  47.         w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9); 
  48. a = r1(); w2(0xc);  b = r1(); w2(9); w2(0xc); w2(9);
  49. return j44(a,b);
  51. }
  53. static void ktti_read_block( PIA *pi, char * buf, int count )
  55. { int  k, a, b;
  57. for (k=0;k<count/2;k++) {
  58. w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
  59. a = r1(); w2(0xc); b = r1(); w2(9);
  60. buf[2*k] = j44(a,b);
  61. a = r1(); w2(0xc); b = r1(); w2(9);
  62. buf[2*k+1] = j44(a,b);
  63. }
  64. }
  66. static void ktti_write_block( PIA *pi, char * buf, int count )
  68. { int k;
  70. for (k=0;k<count/2;k++) {
  71. w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6);
  72. w0(buf[2*k]); w2(3);
  73. w0(buf[2*k+1]); w2(6);
  74. w2(0xb);
  75. }
  76. }
  78. static void ktti_connect ( PIA *pi  )
  80. {       pi->saved_r0 = r0();
  81.         pi->saved_r2 = r2();
  82. w2(0xb); w2(0xa); w0(0); w2(3); w2(6);
  83. }
  85. static void ktti_disconnect ( PIA *pi )
  87. {       w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4);
  88. w0(pi->saved_r0);
  89.         w2(pi->saved_r2);
  90. } 
  92. static void ktti_log_adapter( PIA *pi, char * scratch, int verbose )
  94. {       printk("%s: ktti %s, KT adapter at 0x%x, delay %dn",
  95.                 pi->device,KTTI_VERSION,pi->port,pi->delay);
  97. }
  99. static void ktti_init_proto( PIA *pi)
  101. {       MOD_INC_USE_COUNT;
  102. }
  104. static void ktti_release_proto( PIA *pi)
  106. {       MOD_DEC_USE_COUNT;
  107. }
  109. struct pi_protocol ktti = {"ktti",0,1,2,1,1,
  110.                            ktti_write_regr,
  111.                            ktti_read_regr,
  112.                            ktti_write_block,
  113.                            ktti_read_block,
  114.                            ktti_connect,
  115.                            ktti_disconnect,
  116.                            0,
  117.                            0,
  118.                            0,
  119.                            ktti_log_adapter,
  120.                            ktti_init_proto,
  121.                            ktti_release_proto
  122.                           };
  125. #ifdef MODULE
  127. int     init_module(void)
  129. {       return pi_register( &ktti ) - 1;
  130. }
  132. void    cleanup_module(void)
  134. {       pi_unregister( &ktti );
  135. }
  137. #endif
  139. /* end of ktti.c */
  140. MODULE_LICENSE("GPL");