root/drivers/block/paride/fit3.c

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. fit3_write_regr
  2. fit3_read_regr
  3. fit3_read_block
  4. fit3_write_block
  5. fit3_connect
  6. fit3_disconnect
  7. fit3_log_adapter
  8. fit3_init
  9. fit3_exit

   1 /* 
   2         fit3.c        (c) 1998  Grant R. Guenther <grant@torque.net>
   3                           Under the terms of the GNU General Public License.
   4 
   5         fit3.c is a low-level protocol driver for newer models 
   6         of the Fidelity International Technology parallel port adapter.  
   7         This adapter is used in their TransDisk 3000 portable 
   8         hard-drives, as well as CD-ROM, PD-CD and other devices.
   9 
  10         The TD-2000 and certain older devices use a different protocol.
  11         Try the fit2 protocol module with them.
  12 
  13         NB:  The FIT adapters do not appear to support the control 
  14         registers.  So, we map ALT_STATUS to STATUS and NO-OP writes 
  15         to the device control register - this means that IDE reset 
  16         will not work on these devices.
  17 
  18 */
  19 
  20 #define FIT3_VERSION      "1.0"
  21 
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24 #include <linux/delay.h>
  25 #include <linux/kernel.h>
  26 #include <linux/types.h>
  27 #include <linux/wait.h>
  28 #include <asm/io.h>
  29 
  30 #include "paride.h"
  31 
  32 #define j44(a,b)                (((a>>3)&0x0f)|((b<<1)&0xf0))
  33 
  34 #define w7(byte)                {out_p(7,byte);}
  35 #define r7()                    (in_p(7) & 0xff)
  36 
  37 /* cont = 0 - access the IDE register file 
  38    cont = 1 - access the IDE command set 
  39 
  40 */
  41 
  42 static void  fit3_write_regr( PIA *pi, int cont, int regr, int val)
  43 
  44 {       if (cont == 1) return;
  45 
  46         switch (pi->mode) {
  47 
  48         case 0:
  49         case 1: w2(0xc); w0(regr); w2(0x8); w2(0xc); 
  50                 w0(val); w2(0xd); 
  51                 w0(0);   w2(0xc);
  52                 break;
  53 
  54         case 2: w2(0xc); w0(regr); w2(0x8); w2(0xc);
  55                 w4(val); w4(0);
  56                 w2(0xc);
  57                 break;
  58 
  59         }
  60 }
  61 
  62 static int fit3_read_regr( PIA *pi, int cont, int regr )
  63 
  64 {       int  a, b;
  65 
  66         if (cont) {
  67           if (regr != 6) return 0xff;
  68           regr = 7;
  69         } 
  70 
  71         switch (pi->mode) {
  72 
  73         case 0: w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc);
  74                 w2(0xd); a = r1();
  75                 w2(0xf); b = r1(); 
  76                 w2(0xc);
  77                 return j44(a,b);
  78 
  79         case 1: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
  80                 w2(0xec); w2(0xee); w2(0xef); a = r0(); 
  81                 w2(0xc);
  82                 return a;
  83 
  84         case 2: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc); 
  85                 w2(0xec); 
  86                 a = r4(); b = r4(); 
  87                 w2(0xc);
  88                 return a;
  89 
  90         }
  91         return -1; 
  92 
  93 }
  94 
  95 static void fit3_read_block( PIA *pi, char * buf, int count )
  96 
  97 {       int  k, a, b, c, d;
  98 
  99         switch (pi->mode) {
 100 
 101         case 0: w2(0xc); w0(0x10); w2(0x8); w2(0xc);
 102                 for (k=0;k<count/2;k++) {
 103                     w2(0xd); a = r1();
 104                     w2(0xf); b = r1();
 105                     w2(0xc); c = r1();
 106                     w2(0xe); d = r1();
 107                     buf[2*k  ] = j44(a,b);
 108                     buf[2*k+1] = j44(c,d);
 109                 }
 110                 w2(0xc);
 111                 break;
 112 
 113         case 1: w2(0xc); w0(0x90); w2(0x8); w2(0xc); 
 114                 w2(0xec); w2(0xee);
 115                 for (k=0;k<count/2;k++) {
 116                     w2(0xef); a = r0();
 117                     w2(0xee); b = r0();
 118                     buf[2*k  ] = a;
 119                     buf[2*k+1] = b;
 120                 }
 121                 w2(0xec); 
 122                 w2(0xc);
 123                 break;
 124 
 125         case 2: w2(0xc); w0(0x90); w2(0x8); w2(0xc); 
 126                 w2(0xec);
 127                 for (k=0;k<count;k++) buf[k] = r4();
 128                 w2(0xc);
 129                 break;
 130 
 131         }
 132 }
 133 
 134 static void fit3_write_block( PIA *pi, char * buf, int count )
 135 
 136 {       int k;
 137 
 138         switch (pi->mode) {
 139 
 140         case 0:
 141         case 1: w2(0xc); w0(0); w2(0x8); w2(0xc);
 142                 for (k=0;k<count/2;k++) {
 143                     w0(buf[2*k  ]); w2(0xd);
 144                     w0(buf[2*k+1]); w2(0xc);
 145                 }
 146                 break;
 147 
 148         case 2: w2(0xc); w0(0); w2(0x8); w2(0xc); 
 149                 for (k=0;k<count;k++) w4(buf[k]);
 150                 w2(0xc);
 151                 break;
 152         }
 153 }
 154 
 155 static void fit3_connect ( PIA *pi  )
 156 
 157 {       pi->saved_r0 = r0();
 158         pi->saved_r2 = r2();
 159         w2(0xc); w0(0); w2(0xa);
 160         if (pi->mode == 2) { 
 161                 w2(0xc); w0(0x9); w2(0x8); w2(0xc); 
 162                 }
 163 }
 164 
 165 static void fit3_disconnect ( PIA *pi )
 166 
 167 {       w2(0xc); w0(0xa); w2(0x8); w2(0xc);
 168         w0(pi->saved_r0);
 169         w2(pi->saved_r2);
 170 } 
 171 
 172 static void fit3_log_adapter( PIA *pi, char * scratch, int verbose )
 173 
 174 {       char    *mode_string[3] = {"4-bit","8-bit","EPP"};
 175 
 176         printk("%s: fit3 %s, FIT 3000 adapter at 0x%x, "
 177                "mode %d (%s), delay %d\n",
 178                 pi->device,FIT3_VERSION,pi->port,
 179                 pi->mode,mode_string[pi->mode],pi->delay);
 180 
 181 }
 182 
 183 static struct pi_protocol fit3 = {
 184         .owner          = THIS_MODULE,
 185         .name           = "fit3",
 186         .max_mode       = 3,
 187         .epp_first      = 2,
 188         .default_delay  = 1,
 189         .max_units      = 1,
 190         .write_regr     = fit3_write_regr,
 191         .read_regr      = fit3_read_regr,
 192         .write_block    = fit3_write_block,
 193         .read_block     = fit3_read_block,
 194         .connect        = fit3_connect,
 195         .disconnect     = fit3_disconnect,
 196         .log_adapter    = fit3_log_adapter,
 197 };
 198 
 199 static int __init fit3_init(void)
 200 {
 201         return paride_register(&fit3);
 202 }
 203 
 204 static void __exit fit3_exit(void)
 205 {
 206         paride_unregister(&fit3);
 207 }
 208 
 209 MODULE_LICENSE("GPL");
 210 module_init(fit3_init)
 211 module_exit(fit3_exit)

/* [<][>][^][v][top][bottom][index][help] */