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/drivers/block/paride/fit3.c

https://bitbucket.org/evzijst/gittest
C | 211 lines | 144 code | 45 blank | 22 comment | 16 complexity | d2046b031a8f412b96e77749a5f3e7a4 MD5 | raw file
  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
 42static 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
 62static 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
 95static 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
134static 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
155static 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
165static 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
172static 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
183static 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
199static int __init fit3_init(void)
200{
201	return pi_register(&fit3)-1;
202}
203
204static void __exit fit3_exit(void)
205{
206	pi_unregister(&fit3);
207}
208
209MODULE_LICENSE("GPL");
210module_init(fit3_init)
211module_exit(fit3_exit)