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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | kbic.c (c) 1997-8 Grant R. Guenther <grant@torque.net> | |
3 | Under the terms of the GNU General 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/init.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/kernel.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/wait.h> | |
29 | #include <asm/io.h> | |
30 | ||
31 | #include "paride.h" | |
32 | ||
33 | #define r12w() (delay_p,inw(pi->port+1)&0xffff) | |
34 | ||
35 | #define j44(a,b) ((((a>>4)&0x0f)|(b&0xf0))^0x88) | |
36 | #define j53(w) (((w>>3)&0x1f)|((w>>4)&0xe0)) | |
37 | ||
38 | ||
39 | /* cont = 0 - access the IDE register file | |
40 | cont = 1 - access the IDE command set | |
41 | */ | |
42 | ||
43 | static int cont_map[2] = { 0x80, 0x40 }; | |
44 | ||
45 | static int kbic_read_regr( PIA *pi, int cont, int regr ) | |
46 | ||
47 | { int a, b, s; | |
48 | ||
49 | s = cont_map[cont]; | |
50 | ||
51 | switch (pi->mode) { | |
52 | ||
53 | case 0: w0(regr|0x18|s); w2(4); w2(6); w2(4); w2(1); w0(8); | |
54 | a = r1(); w0(0x28); b = r1(); w2(4); | |
55 | return j44(a,b); | |
56 | ||
57 | case 1: w0(regr|0x38|s); w2(4); w2(6); w2(4); w2(5); w0(8); | |
58 | a = r12w(); w2(4); | |
59 | return j53(a); | |
60 | ||
61 | case 2: w0(regr|0x08|s); w2(4); w2(6); w2(4); w2(0xa5); w2(0xa1); | |
62 | a = r0(); w2(4); | |
63 | return a; | |
64 | ||
65 | case 3: | |
66 | case 4: | |
67 | case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr); | |
68 | a = r4(); b = r4(); w2(4); w2(0); w2(4); | |
69 | return a; | |
70 | ||
71 | } | |
72 | return -1; | |
73 | } | |
74 | ||
75 | static void kbic_write_regr( PIA *pi, int cont, int regr, int val) | |
76 | ||
77 | { int s; | |
78 | ||
79 | s = cont_map[cont]; | |
80 | ||
81 | switch (pi->mode) { | |
82 | ||
83 | case 0: | |
84 | case 1: | |
85 | case 2: w0(regr|0x10|s); w2(4); w2(6); w2(4); | |
86 | w0(val); w2(5); w2(4); | |
87 | break; | |
88 | ||
89 | case 3: | |
90 | case 4: | |
91 | case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr); | |
92 | w4(val); w4(val); | |
93 | w2(4); w2(0); w2(4); | |
94 | break; | |
95 | ||
96 | } | |
97 | } | |
98 | ||
99 | static void k951_connect ( PIA *pi ) | |
100 | ||
101 | { pi->saved_r0 = r0(); | |
102 | pi->saved_r2 = r2(); | |
103 | w2(4); | |
104 | } | |
105 | ||
106 | static void k951_disconnect ( PIA *pi ) | |
107 | ||
108 | { w0(pi->saved_r0); | |
109 | w2(pi->saved_r2); | |
110 | } | |
111 | ||
112 | #define CCP(x) w2(0xc4);w0(0xaa);w0(0x55);w0(0);w0(0xff);w0(0x87);\ | |
113 | w0(0x78);w0(x);w2(0xc5);w2(0xc4);w0(0xff); | |
114 | ||
115 | static void k971_connect ( PIA *pi ) | |
116 | ||
117 | { pi->saved_r0 = r0(); | |
118 | pi->saved_r2 = r2(); | |
119 | CCP(0x20); | |
120 | w2(4); | |
121 | } | |
122 | ||
123 | static void k971_disconnect ( PIA *pi ) | |
124 | ||
125 | { CCP(0x30); | |
126 | w0(pi->saved_r0); | |
127 | w2(pi->saved_r2); | |
128 | } | |
129 | ||
130 | /* counts must be congruent to 0 MOD 4, but all known applications | |
131 | have this property. | |
132 | */ | |
133 | ||
134 | static void kbic_read_block( PIA *pi, char * buf, int count ) | |
135 | ||
136 | { int k, a, b; | |
137 | ||
138 | switch (pi->mode) { | |
139 | ||
140 | case 0: w0(0x98); w2(4); w2(6); w2(4); | |
141 | for (k=0;k<count/2;k++) { | |
142 | w2(1); w0(8); a = r1(); | |
143 | w0(0x28); b = r1(); | |
144 | buf[2*k] = j44(a,b); | |
145 | w2(5); b = r1(); | |
146 | w0(8); a = r1(); | |
147 | buf[2*k+1] = j44(a,b); | |
148 | w2(4); | |
149 | } | |
150 | break; | |
151 | ||
152 | case 1: w0(0xb8); w2(4); w2(6); w2(4); | |
153 | for (k=0;k<count/4;k++) { | |
154 | w0(0xb8); | |
155 | w2(4); w2(5); | |
156 | w0(8); buf[4*k] = j53(r12w()); | |
157 | w0(0xb8); buf[4*k+1] = j53(r12w()); | |
158 | w2(4); w2(5); | |
159 | buf[4*k+3] = j53(r12w()); | |
160 | w0(8); buf[4*k+2] = j53(r12w()); | |
161 | } | |
162 | w2(4); | |
163 | break; | |
164 | ||
165 | case 2: w0(0x88); w2(4); w2(6); w2(4); | |
166 | for (k=0;k<count/2;k++) { | |
167 | w2(0xa0); w2(0xa1); buf[2*k] = r0(); | |
168 | w2(0xa5); buf[2*k+1] = r0(); | |
169 | } | |
170 | w2(4); | |
171 | break; | |
172 | ||
173 | case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0); | |
174 | for (k=0;k<count;k++) buf[k] = r4(); | |
175 | w2(4); w2(0); w2(4); | |
176 | break; | |
177 | ||
178 | case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0); | |
179 | for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w(); | |
180 | w2(4); w2(0); w2(4); | |
181 | break; | |
182 | ||
183 | case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0); | |
184 | for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l(); | |
185 | w2(4); w2(0); w2(4); | |
186 | break; | |
187 | ||
188 | ||
189 | } | |
190 | } | |
191 | ||
192 | static void kbic_write_block( PIA *pi, char * buf, int count ) | |
193 | ||
194 | { int k; | |
195 | ||
196 | switch (pi->mode) { | |
197 | ||
198 | case 0: | |
199 | case 1: | |
200 | case 2: w0(0x90); w2(4); w2(6); w2(4); | |
201 | for(k=0;k<count/2;k++) { | |
202 | w0(buf[2*k+1]); w2(0); w2(4); | |
203 | w0(buf[2*k]); w2(5); w2(4); | |
204 | } | |
205 | break; | |
206 | ||
207 | case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0); | |
208 | for(k=0;k<count/2;k++) { | |
209 | w4(buf[2*k+1]); | |
210 | w4(buf[2*k]); | |
211 | } | |
212 | w2(4); w2(0); w2(4); | |
213 | break; | |
214 | ||
215 | case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0); | |
216 | for(k=0;k<count/2;k++) w4w(pi_swab16(buf,k)); | |
217 | w2(4); w2(0); w2(4); | |
218 | break; | |
219 | ||
220 | case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0); | |
221 | for(k=0;k<count/4;k++) w4l(pi_swab32(buf,k)); | |
222 | w2(4); w2(0); w2(4); | |
223 | break; | |
224 | ||
225 | } | |
226 | ||
227 | } | |
228 | ||
229 | static void kbic_log_adapter( PIA *pi, char * scratch, | |
230 | int verbose, char * chip ) | |
231 | ||
232 | { char *mode_string[6] = {"4-bit","5/3","8-bit", | |
233 | "EPP-8","EPP_16","EPP-32"}; | |
234 | ||
235 | printk("%s: kbic %s, KingByte %s at 0x%x, ", | |
236 | pi->device,KBIC_VERSION,chip,pi->port); | |
237 | printk("mode %d (%s), delay %d\n",pi->mode, | |
238 | mode_string[pi->mode],pi->delay); | |
239 | ||
240 | } | |
241 | ||
242 | static void k951_log_adapter( PIA *pi, char * scratch, int verbose ) | |
243 | ||
244 | { kbic_log_adapter(pi,scratch,verbose,"KBIC-951A"); | |
245 | } | |
246 | ||
247 | static void k971_log_adapter( PIA *pi, char * scratch, int verbose ) | |
248 | ||
249 | { kbic_log_adapter(pi,scratch,verbose,"KBIC-971A"); | |
250 | } | |
251 | ||
252 | static struct pi_protocol k951 = { | |
253 | .owner = THIS_MODULE, | |
254 | .name = "k951", | |
255 | .max_mode = 6, | |
256 | .epp_first = 3, | |
257 | .default_delay = 1, | |
258 | .max_units = 1, | |
259 | .write_regr = kbic_write_regr, | |
260 | .read_regr = kbic_read_regr, | |
261 | .write_block = kbic_write_block, | |
262 | .read_block = kbic_read_block, | |
263 | .connect = k951_connect, | |
264 | .disconnect = k951_disconnect, | |
265 | .log_adapter = k951_log_adapter, | |
266 | }; | |
267 | ||
268 | static struct pi_protocol k971 = { | |
269 | .owner = THIS_MODULE, | |
270 | .name = "k971", | |
271 | .max_mode = 6, | |
272 | .epp_first = 3, | |
273 | .default_delay = 1, | |
274 | .max_units = 1, | |
275 | .write_regr = kbic_write_regr, | |
276 | .read_regr = kbic_read_regr, | |
277 | .write_block = kbic_write_block, | |
278 | .read_block = kbic_read_block, | |
279 | .connect = k971_connect, | |
280 | .disconnect = k971_disconnect, | |
281 | .log_adapter = k971_log_adapter, | |
282 | }; | |
283 | ||
284 | static int __init kbic_init(void) | |
285 | { | |
286 | return (pi_register(&k951)||pi_register(&k971))-1; | |
287 | } | |
288 | ||
289 | static void __exit kbic_exit(void) | |
290 | { | |
291 | pi_unregister(&k951); | |
292 | pi_unregister(&k971); | |
293 | } | |
294 | ||
295 | MODULE_LICENSE("GPL"); | |
296 | module_init(kbic_init) | |
297 | module_exit(kbic_exit) |