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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [block/] [paride/] [on26.c] - Blame information for rev 1765

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Line No. Rev Author Line
1 199 simons 
/*
2 
        on26.c    (c) 1997-8  Grant R. Guenther <grant@torque.net>
3 
                              Under the terms of the GNU public license.
4 
 
5 
        on26.c is a low-level protocol driver for the
6 
        OnSpec 90c26 parallel to IDE adapter chip.
7 
 
8 
*/
9 
 
10 
/* Changes:
11 
 
12 
        1.01    GRG 1998.05.06 init_proto, release_proto
13 
        1.02    GRG 1998.09.23 updates for the -E rev chip
14 
        1.03    GRG 1998.12.14 fix for slave drives
15 
        1.04    GRG 1998.12.20 yet another bug fix
16 
 
17 
*/
18 
 
19 
#define ON26_VERSION      "1.04"
20 
 
21 
#include <linux/module.h>
22 
#include <linux/delay.h>
23 
#include <linux/kernel.h>
24 
#include <linux/types.h>
25 
#include <asm/io.h>
26 
 
27 
#include "paride.h"
28 
 
29 
/* mode codes:  0  nybble reads, 8-bit writes
30 
                1  8-bit reads and writes
31 
                2  8-bit EPP mode
32 
                3  EPP-16
33 
                4  EPP-32
34 
*/
35 
 
36 
#define j44(a,b)  (((a>>4)&0x0f)|(b&0xf0))
37 
 
38 
#define P1      w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
39 
#define P2      w2(5);w2(7);w2(5);w2(4);
40 
 
41 
/* cont = 0 - access the IDE register file
42 
   cont = 1 - access the IDE command set
43 
*/
44 
 
45 
static int on26_read_regr( PIA *pi, int cont, int regr )
46 
 
47 
{       int     a, b, r;
48 
 
49 
        r = (regr<<2) + 1 + cont;
50 
 
51 
        switch (pi->mode)  {
52 
 
53 
        case 0: w0(1); P1; w0(r); P2; w0(0); P1;
54 
                w2(6); a = r1(); w2(4);
55 
                w2(6); b = r1(); w2(4);
56 
                w2(6); w2(4); w2(6); w2(4);
57 
                return j44(a,b);
58 
 
59 
        case 1: w0(1); P1; w0(r); P2; w0(0); P1;
60 
                w2(0x26); a = r0(); w2(4); w2(0x26); w2(4);
61 
                return a;
62 
 
63 
        case 2:
64 
        case 3:
65 
        case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
66 
                w3(0); w3(0); w2(0x24); a = r4(); w2(4);
67 
                w2(0x24); r4(); w2(4);
68 
                return a;
69 
 
70 
        }
71 
        return -1;
72 
}
73 
 
74 
static void on26_write_regr( PIA *pi, int cont, int regr, int val )
75 
 
76 
{       int  r;
77 
 
78 
        r = (regr<<2) + 1 + cont;
79 
 
80 
        switch (pi->mode)  {
81 
 
82 
        case 0:
83 
        case 1: w0(1); P1; w0(r); P2; w0(0); P1;
84 
                w0(val); P2; w0(val); P2;
85 
                break;
86 
 
87 
        case 2:
88 
        case 3:
89 
        case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
90 
                w3(0); w3(0);
91 
                w2(5); w4(val); w2(4);
92 
                w2(5); w4(val); w2(4);
93 
                break;
94 
        }
95 
}
96 
 
97 
#define  CCP(x)  w0(0xfe);w0(0xaa);w0(0x55);w0(0);w0(0xff);\
98 
                 w0(0x87);w0(0x78);w0(x);w2(4);w2(5);w2(4);w0(0xff);
99 
 
100 
static void on26_connect ( PIA *pi )
101 
 
102 
{       int     x;
103 
 
104 
        pi->saved_r0 = r0();
105 
        pi->saved_r2 = r2();
106 
 
107 
        CCP(0x20);
108 
        x = 8; if (pi->mode) x = 9;
109 
 
110 
        w0(2); P1; w0(8); P2;
111 
        w0(2); P1; w0(x); P2;
112 
}
113 
 
114 
static void on26_disconnect ( PIA *pi )
115 
 
116 
{       if (pi->mode >= 2) { w3(4); w3(4); w3(4); w3(4); }
117 
                      else { w0(4); P1; w0(4); P1; }
118 
        CCP(0x30);
119 
        w0(pi->saved_r0);
120 
        w2(pi->saved_r2);
121 
}
122 
 
123 
#define RESET_WAIT  200
124 
 
125 
static int on26_test_port( PIA *pi)  /* hard reset */
126 
 
127 
{       int     i, m, d, x, y;
128 
 
129 
        pi->saved_r0 = r0();
130 
        pi->saved_r2 = r2();
131 
 
132 
        d = pi->delay;
133 
        m = pi->mode;
134 
        pi->delay = 5;
135 
        pi->mode = 0;
136 
 
137 
        w2(0xc);
138 
 
139 
        CCP(0x30); CCP(0);
140 
 
141 
        w0(0xfe);w0(0xaa);w0(0x55);w0(0);w0(0xff);
142 
        i = ((r1() & 0xf0) << 4); w0(0x87);
143 
        i |= (r1() & 0xf0); w0(0x78);
144 
        w0(0x20);w2(4);w2(5);
145 
        i |= ((r1() & 0xf0) >> 4);
146 
        w2(4);w0(0xff);
147 
 
148 
        if (i == 0xb5f) {
149 
 
150 
            w0(2); P1; w0(0);   P2;
151 
            w0(3); P1; w0(0);   P2;
152 
            w0(2); P1; w0(8);   P2; udelay(100);
153 
            w0(2); P1; w0(0xa); P2; udelay(100);
154 
            w0(2); P1; w0(8);   P2; udelay(1000);
155 
 
156 
            on26_write_regr(pi,0,6,0xa0);
157 
 
158 
            for (i=0;i<RESET_WAIT;i++) {
159 
                on26_write_regr(pi,0,6,0xa0);
160 
                x = on26_read_regr(pi,0,7);
161 
                on26_write_regr(pi,0,6,0xb0);
162 
                y = on26_read_regr(pi,0,7);
163 
                if (!((x&0x80)||(y&0x80))) break;
164 
                udelay(100000);
165 
            }
166 
 
167 
            if (i == RESET_WAIT)
168 
                printk("on26: Device reset failed (%x,%x)\n",x,y);
169 
 
170 
            w0(4); P1; w0(4); P1;
171 
        }
172 
 
173 
        CCP(0x30);
174 
 
175 
        pi->delay = d;
176 
        pi->mode = m;
177 
        w0(pi->saved_r0);
178 
        w2(pi->saved_r2);
179 
 
180 
        return 5;
181 
}
182 
 
183 
 
184 
static void on26_read_block( PIA *pi, char * buf, int count )
185 
 
186 
{       int     k, a, b;
187 
 
188 
        switch (pi->mode) {
189 
 
190 
        case 0: w0(1); P1; w0(1); P2; w0(2); P1; w0(0x18); P2; w0(0); P1;
191 
                udelay(10);
192 
                for (k=0;k<count;k++) {
193 
                        w2(6); a = r1();
194 
                        w2(4); b = r1();
195 
                        buf[k] = j44(a,b);
196 
                }
197 
                w0(2); P1; w0(8); P2;
198 
                break;
199 
 
200 
        case 1: w0(1); P1; w0(1); P2; w0(2); P1; w0(0x19); P2; w0(0); P1;
201 
                udelay(10);
202 
                for (k=0;k<count/2;k++) {
203 
                        w2(0x26); buf[2*k] = r0();
204 
                        w2(0x24); buf[2*k+1] = r0();
205 
                }
206 
                w0(2); P1; w0(9); P2;
207 
                break;
208 
 
209 
        case 2: w3(1); w3(1); w2(5); w4(1); w2(4);
210 
                w3(0); w3(0); w2(0x24);
211 
                udelay(10);
212 
                for (k=0;k<count;k++) buf[k] = r4();
213 
                w2(4);
214 
                break;
215 
 
216 
        case 3: w3(1); w3(1); w2(5); w4(1); w2(4);
217 
                w3(0); w3(0); w2(0x24);
218 
                udelay(10);
219 
                for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w();
220 
                w2(4);
221 
                break;
222 
 
223 
        case 4: w3(1); w3(1); w2(5); w4(1); w2(4);
224 
                w3(0); w3(0); w2(0x24);
225 
                udelay(10);
226 
                for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l();
227 
                w2(4);
228 
                break;
229 
 
230 
        }
231 
}
232 
 
233 
static void on26_write_block( PIA *pi, char * buf, int count )
234 
 
235 
{       int     k;
236 
 
237 
        switch (pi->mode) {
238 
 
239 
        case 0:
240 
        case 1: w0(1); P1; w0(1); P2;
241 
                w0(2); P1; w0(0x18+pi->mode); P2; w0(0); P1;
242 
                udelay(10);
243 
                for (k=0;k<count/2;k++) {
244 
                        w2(5); w0(buf[2*k]);
245 
                        w2(7); w0(buf[2*k+1]);
246 
                }
247 
                w2(5); w2(4);
248 
                w0(2); P1; w0(8+pi->mode); P2;
249 
                break;
250 
 
251 
        case 2: w3(1); w3(1); w2(5); w4(1); w2(4);
252 
                w3(0); w3(0); w2(0xc5);
253 
                udelay(10);
254 
                for (k=0;k<count;k++) w4(buf[k]);
255 
                w2(0xc4);
256 
                break;
257 
 
258 
        case 3: w3(1); w3(1); w2(5); w4(1); w2(4);
259 
                w3(0); w3(0); w2(0xc5);
260 
                udelay(10);
261 
                for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]);
262 
                w2(0xc4);
263 
                break;
264 
 
265 
        case 4: w3(1); w3(1); w2(5); w4(1); w2(4);
266 
                w3(0); w3(0); w2(0xc5);
267 
                udelay(10);
268 
                for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]);
269 
                w2(0xc4);
270 
                break;
271 
 
272 
        }
273 
 
274 
}
275 
 
276 
static void on26_log_adapter( PIA *pi, char * scratch, int verbose )
277 
 
278 
{       char    *mode_string[5] = {"4-bit","8-bit","EPP-8",
279 
                                   "EPP-16","EPP-32"};
280 
 
281 
        printk("%s: on26 %s, OnSpec 90c26 at 0x%x, ",
282 
                pi->device,ON26_VERSION,pi->port);
283 
        printk("mode %d (%s), delay %d\n",pi->mode,
284 
                mode_string[pi->mode],pi->delay);
285 
 
286 
}
287 
 
288 
static void on26_init_proto( PIA *pi)
289 
 
290 
{       MOD_INC_USE_COUNT;
291 
}
292 
 
293 
static void on26_release_proto( PIA *pi)
294 
 
295 
{       MOD_DEC_USE_COUNT;
296 
}
297 
 
298 
struct pi_protocol on26 = {"on26",0,5,2,1,1,
299 
                           on26_write_regr,
300 
                           on26_read_regr,
301 
                           on26_write_block,
302 
                           on26_read_block,
303 
                           on26_connect,
304 
                           on26_disconnect,
305 
                           on26_test_port,
306 
                           0,
307 
                           0,
308 
                           on26_log_adapter,
309 
                           on26_init_proto,
310 
                           on26_release_proto
311 
                          };
312 
 
313 
 
314 
#ifdef MODULE
315 
 
316 
int     init_module(void)
317 
 
318 
{       return pi_register( &on26 ) - 1;
319 
}
320 
 
321 
void    cleanup_module(void)
322 
 
323 
{       pi_unregister( &on26 );
324 
}
325 
 
326 
#endif
327 
 
328 
/* end of on26.c */
329 
 

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