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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [block/] [paride/] [kbic.c] - Blame information for rev 1782

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Line No. Rev Author Line
1 199 simons 
/*
2 
        kbic.c    (c) 1997-8  Grant R. Guenther <grant@torque.net>
3 
                              Under the terms of the GNU public license.
4 
 
5 
        This is a low-level driver for the KBIC-951A and KBIC-971A
6 
        parallel to IDE adapter chips from KingByte Information Systems.
7 
 
8 
        The chips are almost identical, however, the wakeup code
9 
        required for the 971A interferes with the correct operation of
10 
        the 951A, so this driver registers itself twice, once for
11 
        each chip.
12 
 
13 
*/
14 
 
15 
/* Changes:
16 
 
17 
        1.01    GRG 1998.05.06 init_proto, release_proto
18 
 
19 
*/
20 
 
21 
#define KBIC_VERSION      "1.01"
22 
 
23 
#include <linux/module.h>
24 
#include <linux/delay.h>
25 
#include <linux/kernel.h>
26 
#include <linux/types.h>
27 
#include <asm/io.h>
28 
 
29 
#include "paride.h"
30 
 
31 
#define r12w()                  (delay_p,inw(pi->port+1)&0xffff)
32 
 
33 
#define j44(a,b)                ((((a>>4)&0x0f)|(b&0xf0))^0x88)
34 
#define j53(w)                  (((w>>3)&0x1f)|((w>>4)&0xe0))
35 
 
36 
 
37 
/* cont = 0 - access the IDE register file
38 
   cont = 1 - access the IDE command set
39 
*/
40 
 
41 
static int  cont_map[2] = { 0x80, 0x40 };
42 
 
43 
static int kbic_read_regr( PIA *pi, int cont, int regr )
44 
 
45 
{       int     a, b, s;
46 
 
47 
        s = cont_map[cont];
48 
 
49 
        switch (pi->mode) {
50 
 
51 
        case 0: w0(regr|0x18|s); w2(4); w2(6); w2(4); w2(1); w0(8);
52 
                a = r1(); w0(0x28); b = r1(); w2(4);
53 
                return j44(a,b);
54 
 
55 
        case 1: w0(regr|0x38|s); w2(4); w2(6); w2(4); w2(5); w0(8);
56 
                a = r12w(); w2(4);
57 
                return j53(a);
58 
 
59 
        case 2: w0(regr|0x08|s); w2(4); w2(6); w2(4); w2(0xa5); w2(0xa1);
60 
                a = r0(); w2(4);
61 
                return a;
62 
 
63 
        case 3:
64 
        case 4:
65 
        case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr);
66 
                a = r4(); b = r4(); w2(4); w2(0); w2(4);
67 
                return a;
68 
 
69 
        }
70 
        return -1;
71 
}
72 
 
73 
static void  kbic_write_regr( PIA *pi, int cont, int regr, int val)
74 
 
75 
{       int  s;
76 
 
77 
        s = cont_map[cont];
78 
 
79 
        switch (pi->mode) {
80 
 
81 
        case 0:
82 
        case 1:
83 
        case 2: w0(regr|0x10|s); w2(4); w2(6); w2(4);
84 
                w0(val); w2(5); w2(4);
85 
                break;
86 
 
87 
        case 3:
88 
        case 4:
89 
        case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr);
90 
                w4(val); w4(val);
91 
                w2(4); w2(0); w2(4);
92 
                break;
93 
 
94 
        }
95 
}
96 
 
97 
static void k951_connect ( PIA *pi  )
98 
 
99 
{       pi->saved_r0 = r0();
100 
        pi->saved_r2 = r2();
101 
        w2(4);
102 
}
103 
 
104 
static void k951_disconnect ( PIA *pi )
105 
 
106 
{       w0(pi->saved_r0);
107 
        w2(pi->saved_r2);
108 
}
109 
 
110 
#define CCP(x)  w2(0xc4);w0(0xaa);w0(0x55);w0(0);w0(0xff);w0(0x87);\
111 
                w0(0x78);w0(x);w2(0xc5);w2(0xc4);w0(0xff);
112 
 
113 
static void k971_connect ( PIA *pi  )
114 
 
115 
{       pi->saved_r0 = r0();
116 
        pi->saved_r2 = r2();
117 
        CCP(0x20);
118 
        w2(4);
119 
}
120 
 
121 
static void k971_disconnect ( PIA *pi )
122 
 
123 
{       CCP(0x30);
124 
        w0(pi->saved_r0);
125 
        w2(pi->saved_r2);
126 
}
127 
 
128 
/* counts must be congruent to 0 MOD 4, but all known applications
129 
   have this property.
130 
*/
131 
 
132 
static void kbic_read_block( PIA *pi, char * buf, int count )
133 
 
134 
{       int     k, a, b;
135 
 
136 
        switch (pi->mode) {
137 
 
138 
        case 0: w0(0x98); w2(4); w2(6); w2(4);
139 
                for (k=0;k<count/2;k++) {
140 
                        w2(1); w0(8);    a = r1();
141 
                               w0(0x28); b = r1();
142 
                        buf[2*k]   = j44(a,b);
143 
                        w2(5);           b = r1();
144 
                               w0(8);    a = r1();
145 
                        buf[2*k+1] = j44(a,b);
146 
                        w2(4);
147 
                }
148 
                break;
149 
 
150 
        case 1: w0(0xb8); w2(4); w2(6); w2(4);
151 
                for (k=0;k<count/4;k++) {
152 
                        w0(0xb8);
153 
                        w2(4); w2(5);
154 
                        w0(8);    buf[4*k]   = j53(r12w());
155 
                        w0(0xb8); buf[4*k+1] = j53(r12w());
156 
                        w2(4); w2(5);
157 
                                  buf[4*k+3] = j53(r12w());
158 
                        w0(8);    buf[4*k+2] = j53(r12w());
159 
                }
160 
                w2(4);
161 
                break;
162 
 
163 
        case 2: w0(0x88); w2(4); w2(6); w2(4);
164 
                for (k=0;k<count/2;k++) {
165 
                        w2(0xa0); w2(0xa1); buf[2*k] = r0();
166 
                        w2(0xa5); buf[2*k+1] = r0();
167 
                }
168 
                w2(4);
169 
                break;
170 
 
171 
        case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
172 
                for (k=0;k<count;k++) buf[k] = r4();
173 
                w2(4); w2(0); w2(4);
174 
                break;
175 
 
176 
        case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
177 
                for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w();
178 
                w2(4); w2(0); w2(4);
179 
                break;
180 
 
181 
        case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
182 
                for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l();
183 
                w2(4); w2(0); w2(4);
184 
                break;
185 
 
186 
 
187 
        }
188 
}
189 
 
190 
static void kbic_write_block( PIA *pi, char * buf, int count )
191 
 
192 
{       int     k;
193 
 
194 
        switch (pi->mode) {
195 
 
196 
        case 0:
197 
        case 1:
198 
        case 2: w0(0x90); w2(4); w2(6); w2(4);
199 
                for(k=0;k<count/2;k++) {
200 
                        w0(buf[2*k+1]); w2(0); w2(4);
201 
                        w0(buf[2*k]);   w2(5); w2(4);
202 
                }
203 
                break;
204 
 
205 
        case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
206 
                for(k=0;k<count/2;k++) {
207 
                        w4(buf[2*k+1]);
208 
                        w4(buf[2*k]);
209 
                }
210 
                w2(4); w2(0); w2(4);
211 
                break;
212 
 
213 
        case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
214 
                for(k=0;k<count/2;k++) w4w(pi_swab16(buf,k));
215 
                w2(4); w2(0); w2(4);
216 
                break;
217 
 
218 
        case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
219 
                for(k=0;k<count/4;k++) w4l(pi_swab32(buf,k));
220 
                w2(4); w2(0); w2(4);
221 
                break;
222 
 
223 
        }
224 
 
225 
}
226 
 
227 
static void kbic_log_adapter( PIA *pi, char * scratch,
228 
                              int verbose, char * chip )
229 
 
230 
{       char    *mode_string[6] = {"4-bit","5/3","8-bit",
231 
                                   "EPP-8","EPP_16","EPP-32"};
232 
 
233 
        printk("%s: kbic %s, KingByte %s at 0x%x, ",
234 
                pi->device,KBIC_VERSION,chip,pi->port);
235 
        printk("mode %d (%s), delay %d\n",pi->mode,
236 
                mode_string[pi->mode],pi->delay);
237 
 
238 
}
239 
 
240 
static void k951_log_adapter( PIA *pi, char * scratch, int verbose )
241 
 
242 
{       kbic_log_adapter(pi,scratch,verbose,"KBIC-951A");
243 
}
244 
 
245 
static void k971_log_adapter( PIA *pi, char * scratch, int verbose )
246 
 
247 
{       kbic_log_adapter(pi,scratch,verbose,"KBIC-971A");
248 
}
249 
 
250 
static void kbic_init_proto( PIA *pi)
251 
 
252 
{       MOD_INC_USE_COUNT;
253 
}
254 
 
255 
static void kbic_release_proto( PIA *pi)
256 
 
257 
{       MOD_DEC_USE_COUNT;
258 
}
259 
 
260 
struct pi_protocol k951 = {"k951",0,6,3,1,1,
261 
                           kbic_write_regr,
262 
                           kbic_read_regr,
263 
                           kbic_write_block,
264 
                           kbic_read_block,
265 
                           k951_connect,
266 
                           k951_disconnect,
267 
                           0,
268 
                           0,
269 
                           0,
270 
                           k951_log_adapter,
271 
                           kbic_init_proto,
272 
                           kbic_release_proto
273 
                          };
274 
 
275 
 
276 
struct pi_protocol k971 = {"k971",0,6,3,1,1,
277 
                           kbic_write_regr,
278 
                           kbic_read_regr,
279 
                           kbic_write_block,
280 
                           kbic_read_block,
281 
                           k971_connect,
282 
                           k971_disconnect,
283 
                           0,
284 
                           0,
285 
                           0,
286 
                           k971_log_adapter,
287 
                           kbic_init_proto,
288 
                           kbic_release_proto
289 
                          };
290 
 
291 
#ifdef MODULE
292 
 
293 
int     init_module(void)
294 
 
295 
{       int s5,s7;
296 
 
297 
        s5 = pi_register(&k951);
298 
        s7 = pi_register(&k971);
299 
 
300 
        return (s5 || s7) - 1;
301 
}
302 
 
303 
void    cleanup_module(void)
304 
 
305 
{       pi_unregister( &k951 );
306 
        pi_unregister( &k971 );
307 
}
308 
 
309 
#endif
310 
 
311 
/* end of kbic.c */

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