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19#define EPAT_VERSION "1.02"
20
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/kernel.h>
25#include <linux/types.h>
26#include <linux/wait.h>
27#include <asm/io.h>
28
29#include "paride.h"
30
31#define j44(a,b) (((a>>4)&0x0f)+(b&0xf0))
32#define j53(a,b) (((a>>3)&0x1f)+((b<<4)&0xe0))
33
34static int epatc8;
35
36module_param(epatc8, int, 0);
37MODULE_PARM_DESC(epatc8, "support for the Shuttle EP1284 chip, "
38 "used in any recent Imation SuperDisk (LS-120) drive.");
39
40
41
42
43
44
45static int cont_map[3] = { 0x18, 0x10, 0 };
46
47static void epat_write_regr( PIA *pi, int cont, int regr, int val)
48
49{ int r;
50
51 r = regr + cont_map[cont];
52
53 switch (pi->mode) {
54
55 case 0:
56 case 1:
57 case 2: w0(0x60+r); w2(1); w0(val); w2(4);
58 break;
59
60 case 3:
61 case 4:
62 case 5: w3(0x40+r); w4(val);
63 break;
64
65 }
66}
67
68static int epat_read_regr( PIA *pi, int cont, int regr )
69
70{ int a, b, r;
71
72 r = regr + cont_map[cont];
73
74 switch (pi->mode) {
75
76 case 0: w0(r); w2(1); w2(3);
77 a = r1(); w2(4); b = r1();
78 return j44(a,b);
79
80 case 1: w0(0x40+r); w2(1); w2(4);
81 a = r1(); b = r2(); w0(0xff);
82 return j53(a,b);
83
84 case 2: w0(0x20+r); w2(1); w2(0x25);
85 a = r0(); w2(4);
86 return a;
87
88 case 3:
89 case 4:
90 case 5: w3(r); w2(0x24); a = r4(); w2(4);
91 return a;
92
93 }
94 return -1;
95}
96
97static void epat_read_block( PIA *pi, char * buf, int count )
98
99{ int k, ph, a, b;
100
101 switch (pi->mode) {
102
103 case 0: w0(7); w2(1); w2(3); w0(0xff);
104 ph = 0;
105 for(k=0;k<count;k++) {
106 if (k == count-1) w0(0xfd);
107 w2(6+ph); a = r1();
108 if (a & 8) b = a;
109 else { w2(4+ph); b = r1(); }
110 buf[k] = j44(a,b);
111 ph = 1 - ph;
112 }
113 w0(0); w2(4);
114 break;
115
116 case 1: w0(0x47); w2(1); w2(5); w0(0xff);
117 ph = 0;
118 for(k=0;k<count;k++) {
119 if (k == count-1) w0(0xfd);
120 w2(4+ph);
121 a = r1(); b = r2();
122 buf[k] = j53(a,b);
123 ph = 1 - ph;
124 }
125 w0(0); w2(4);
126 break;
127
128 case 2: w0(0x27); w2(1); w2(0x25); w0(0);
129 ph = 0;
130 for(k=0;k<count-1;k++) {
131 w2(0x24+ph);
132 buf[k] = r0();
133 ph = 1 - ph;
134 }
135 w2(0x26); w2(0x27); buf[count-1] = r0();
136 w2(0x25); w2(4);
137 break;
138
139 case 3: w3(0x80); w2(0x24);
140 for(k=0;k<count-1;k++) buf[k] = r4();
141 w2(4); w3(0xa0); w2(0x24); buf[count-1] = r4();
142 w2(4);
143 break;
144
145 case 4: w3(0x80); w2(0x24);
146 for(k=0;k<(count/2)-1;k++) ((u16 *)buf)[k] = r4w();
147 buf[count-2] = r4();
148 w2(4); w3(0xa0); w2(0x24); buf[count-1] = r4();
149 w2(4);
150 break;
151
152 case 5: w3(0x80); w2(0x24);
153 for(k=0;k<(count/4)-1;k++) ((u32 *)buf)[k] = r4l();
154 for(k=count-4;k<count-1;k++) buf[k] = r4();
155 w2(4); w3(0xa0); w2(0x24); buf[count-1] = r4();
156 w2(4);
157 break;
158
159 }
160}
161
162static void epat_write_block( PIA *pi, char * buf, int count )
163
164{ int ph, k;
165
166 switch (pi->mode) {
167
168 case 0:
169 case 1:
170 case 2: w0(0x67); w2(1); w2(5);
171 ph = 0;
172 for(k=0;k<count;k++) {
173 w0(buf[k]);
174 w2(4+ph);
175 ph = 1 - ph;
176 }
177 w2(7); w2(4);
178 break;
179
180 case 3: w3(0xc0);
181 for(k=0;k<count;k++) w4(buf[k]);
182 w2(4);
183 break;
184
185 case 4: w3(0xc0);
186 for(k=0;k<(count/2);k++) w4w(((u16 *)buf)[k]);
187 w2(4);
188 break;
189
190 case 5: w3(0xc0);
191 for(k=0;k<(count/4);k++) w4l(((u32 *)buf)[k]);
192 w2(4);
193 break;
194
195 }
196}
197
198
199
200#define WR(r,v) epat_write_regr(pi,2,r,v)
201#define RR(r) (epat_read_regr(pi,2,r))
202
203
204
205#define WRi(r,v) epat_write_regr(pi,0,r,v)
206#define RRi(r) (epat_read_regr(pi,0,r))
207
208
209
210#define CPP(x) w2(4);w0(0x22);w0(0xaa);w0(0x55);w0(0);w0(0xff);\
211 w0(0x87);w0(0x78);w0(x);w2(4);w2(5);w2(4);w0(0xff);
212
213static void epat_connect ( PIA *pi )
214
215{ pi->saved_r0 = r0();
216 pi->saved_r2 = r2();
217
218
219 CPP(0);
220
221 if (epatc8) {
222 CPP(0x40);CPP(0xe0);
223 w0(0);w2(1);w2(4);
224 WR(0x8,0x12);WR(0xc,0x14);WR(0x12,0x10);
225 WR(0xe,0xf);WR(0xf,4);
226
227 WR(0xe,0xd);WR(0xf,0);
228
229 }
230
231
232 CPP(0xe0);
233 w0(0);w2(1);w2(4);
234 if (pi->mode >= 3) {
235 w0(0);w2(1);w2(4);w2(0xc);
236
237 w0(0x40);w2(6);w2(7);w2(4);w2(0xc);w2(4);
238 }
239
240 if (!epatc8) {
241 WR(8,0x10); WR(0xc,0x14); WR(0xa,0x38); WR(0x12,0x10);
242 }
243}
244
245static void epat_disconnect (PIA *pi)
246{ CPP(0x30);
247 w0(pi->saved_r0);
248 w2(pi->saved_r2);
249}
250
251static int epat_test_proto( PIA *pi, char * scratch, int verbose )
252
253{ int k, j, f, cc;
254 int e[2] = {0,0};
255
256 epat_connect(pi);
257 cc = RR(0xd);
258 epat_disconnect(pi);
259
260 epat_connect(pi);
261 for (j=0;j<2;j++) {
262 WRi(6,0xa0+j*0x10);
263 for (k=0;k<256;k++) {
264 WRi(2,k^0xaa);
265 WRi(3,k^0x55);
266 if (RRi(2) != (k^0xaa)) e[j]++;
267 }
268 }
269 epat_disconnect(pi);
270
271 f = 0;
272 epat_connect(pi);
273 WR(0x13,1); WR(0x13,0); WR(0xa,0x11);
274 epat_read_block(pi,scratch,512);
275
276 for (k=0;k<256;k++) {
277 if ((scratch[2*k] & 0xff) != k) f++;
278 if ((scratch[2*k+1] & 0xff) != (0xff-k)) f++;
279 }
280 epat_disconnect(pi);
281
282 if (verbose) {
283 printk("%s: epat: port 0x%x, mode %d, ccr %x, test=(%d,%d,%d)\n",
284 pi->device,pi->port,pi->mode,cc,e[0],e[1],f);
285 }
286
287 return (e[0] && e[1]) || f;
288}
289
290static void epat_log_adapter( PIA *pi, char * scratch, int verbose )
291
292{ int ver;
293 char *mode_string[6] =
294 {"4-bit","5/3","8-bit","EPP-8","EPP-16","EPP-32"};
295
296 epat_connect(pi);
297 WR(0xa,0x38);
298 ver = RR(0xb);
299 epat_disconnect(pi);
300
301 printk("%s: epat %s, Shuttle EPAT chip %x at 0x%x, ",
302 pi->device,EPAT_VERSION,ver,pi->port);
303 printk("mode %d (%s), delay %d\n",pi->mode,
304 mode_string[pi->mode],pi->delay);
305
306}
307
308static struct pi_protocol epat = {
309 .owner = THIS_MODULE,
310 .name = "epat",
311 .max_mode = 6,
312 .epp_first = 3,
313 .default_delay = 1,
314 .max_units = 1,
315 .write_regr = epat_write_regr,
316 .read_regr = epat_read_regr,
317 .write_block = epat_write_block,
318 .read_block = epat_read_block,
319 .connect = epat_connect,
320 .disconnect = epat_disconnect,
321 .test_proto = epat_test_proto,
322 .log_adapter = epat_log_adapter,
323};
324
325static int __init epat_init(void)
326{
327#ifdef CONFIG_PARIDE_EPATC8
328 epatc8 = 1;
329#endif
330 return paride_register(&epat);
331}
332
333static void __exit epat_exit(void)
334{
335 paride_unregister(&epat);
336}
337
338MODULE_LICENSE("GPL");
339module_init(epat_init)
340module_exit(epat_exit)
341
