]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | frpw.c (c) 1996-8 Grant R. Guenther <grant@torque.net> | |
3 | Under the terms of the GNU General Public License | |
4 | ||
5 | frpw.c is a low-level protocol driver for the Freecom "Power" | |
6 | parallel port IDE adapter. | |
7 | ||
8 | Some applications of this adapter may require a "printer" reset | |
9 | prior to loading the driver. This can be done by loading and | |
10 | unloading the "lp" driver, or it can be done by this driver | |
11 | if you define FRPW_HARD_RESET. The latter is not recommended | |
12 | as it may upset devices on other ports. | |
13 | ||
14 | */ | |
15 | ||
16 | /* Changes: | |
17 | ||
18 | 1.01 GRG 1998.05.06 init_proto, release_proto | |
19 | fix chip detect | |
20 | added EPP-16 and EPP-32 | |
21 | 1.02 GRG 1998.09.23 added hard reset to initialisation process | |
22 | 1.03 GRG 1998.12.14 made hard reset conditional | |
23 | ||
24 | */ | |
25 | ||
26 | #define FRPW_VERSION "1.03" | |
27 | ||
28 | #include <linux/module.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/wait.h> | |
34 | #include <asm/io.h> | |
35 | ||
36 | #include "paride.h" | |
37 | ||
38 | #define cec4 w2(0xc);w2(0xe);w2(0xe);w2(0xc);w2(4);w2(4);w2(4); | |
39 | #define j44(l,h) (((l>>4)&0x0f)|(h&0xf0)) | |
40 | ||
41 | /* cont = 0 - access the IDE register file | |
42 | cont = 1 - access the IDE command set | |
43 | */ | |
44 | ||
45 | static int cont_map[2] = { 0x08, 0x10 }; | |
46 | ||
47 | static int frpw_read_regr( PIA *pi, int cont, int regr ) | |
48 | ||
49 | { int h,l,r; | |
50 | ||
51 | r = regr + cont_map[cont]; | |
52 | ||
53 | w2(4); | |
54 | w0(r); cec4; | |
55 | w2(6); l = r1(); | |
56 | w2(4); h = r1(); | |
57 | w2(4); | |
58 | ||
59 | return j44(l,h); | |
60 | ||
61 | } | |
62 | ||
63 | static void frpw_write_regr( PIA *pi, int cont, int regr, int val) | |
64 | ||
65 | { int r; | |
66 | ||
67 | r = regr + cont_map[cont]; | |
68 | ||
69 | w2(4); w0(r); cec4; | |
70 | w0(val); | |
71 | w2(5);w2(7);w2(5);w2(4); | |
72 | } | |
73 | ||
74 | static void frpw_read_block_int( PIA *pi, char * buf, int count, int regr ) | |
75 | ||
76 | { int h, l, k, ph; | |
77 | ||
78 | switch(pi->mode) { | |
79 | ||
80 | case 0: w2(4); w0(regr); cec4; | |
81 | for (k=0;k<count;k++) { | |
82 | w2(6); l = r1(); | |
83 | w2(4); h = r1(); | |
84 | buf[k] = j44(l,h); | |
85 | } | |
86 | w2(4); | |
87 | break; | |
88 | ||
89 | case 1: ph = 2; | |
90 | w2(4); w0(regr + 0xc0); cec4; | |
91 | w0(0xff); | |
92 | for (k=0;k<count;k++) { | |
93 | w2(0xa4 + ph); | |
94 | buf[k] = r0(); | |
95 | ph = 2 - ph; | |
96 | } | |
97 | w2(0xac); w2(0xa4); w2(4); | |
98 | break; | |
99 | ||
100 | case 2: w2(4); w0(regr + 0x80); cec4; | |
101 | for (k=0;k<count;k++) buf[k] = r4(); | |
102 | w2(0xac); w2(0xa4); | |
103 | w2(4); | |
104 | break; | |
105 | ||
106 | case 3: w2(4); w0(regr + 0x80); cec4; | |
107 | for (k=0;k<count-2;k++) buf[k] = r4(); | |
108 | w2(0xac); w2(0xa4); | |
109 | buf[count-2] = r4(); | |
110 | buf[count-1] = r4(); | |
111 | w2(4); | |
112 | break; | |
113 | ||
114 | case 4: w2(4); w0(regr + 0x80); cec4; | |
115 | for (k=0;k<(count/2)-1;k++) ((u16 *)buf)[k] = r4w(); | |
116 | w2(0xac); w2(0xa4); | |
117 | buf[count-2] = r4(); | |
118 | buf[count-1] = r4(); | |
119 | w2(4); | |
120 | break; | |
121 | ||
122 | case 5: w2(4); w0(regr + 0x80); cec4; | |
123 | for (k=0;k<(count/4)-1;k++) ((u32 *)buf)[k] = r4l(); | |
124 | buf[count-4] = r4(); | |
125 | buf[count-3] = r4(); | |
126 | w2(0xac); w2(0xa4); | |
127 | buf[count-2] = r4(); | |
128 | buf[count-1] = r4(); | |
129 | w2(4); | |
130 | break; | |
131 | ||
132 | } | |
133 | } | |
134 | ||
135 | static void frpw_read_block( PIA *pi, char * buf, int count) | |
136 | ||
137 | { frpw_read_block_int(pi,buf,count,0x08); | |
138 | } | |
139 | ||
140 | static void frpw_write_block( PIA *pi, char * buf, int count ) | |
141 | ||
142 | { int k; | |
143 | ||
144 | switch(pi->mode) { | |
145 | ||
146 | case 0: | |
147 | case 1: | |
148 | case 2: w2(4); w0(8); cec4; w2(5); | |
149 | for (k=0;k<count;k++) { | |
150 | w0(buf[k]); | |
151 | w2(7);w2(5); | |
152 | } | |
153 | w2(4); | |
154 | break; | |
155 | ||
156 | case 3: w2(4); w0(0xc8); cec4; w2(5); | |
157 | for (k=0;k<count;k++) w4(buf[k]); | |
158 | w2(4); | |
159 | break; | |
160 | ||
161 | case 4: w2(4); w0(0xc8); cec4; w2(5); | |
162 | for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]); | |
163 | w2(4); | |
164 | break; | |
165 | ||
166 | case 5: w2(4); w0(0xc8); cec4; w2(5); | |
167 | for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]); | |
168 | w2(4); | |
169 | break; | |
170 | } | |
171 | } | |
172 | ||
173 | static void frpw_connect ( PIA *pi ) | |
174 | ||
175 | { pi->saved_r0 = r0(); | |
176 | pi->saved_r2 = r2(); | |
177 | w2(4); | |
178 | } | |
179 | ||
180 | static void frpw_disconnect ( PIA *pi ) | |
181 | ||
182 | { w2(4); w0(0x20); cec4; | |
183 | w0(pi->saved_r0); | |
184 | w2(pi->saved_r2); | |
185 | } | |
186 | ||
187 | /* Stub logic to see if PNP string is available - used to distinguish | |
188 | between the Xilinx and ASIC implementations of the Freecom adapter. | |
189 | */ | |
190 | ||
191 | static int frpw_test_pnp ( PIA *pi ) | |
192 | ||
193 | /* returns chip_type: 0 = Xilinx, 1 = ASIC */ | |
194 | ||
195 | { int olddelay, a, b; | |
196 | ||
197 | #ifdef FRPW_HARD_RESET | |
198 | w0(0); w2(8); udelay(50); w2(0xc); /* parallel bus reset */ | |
199 | mdelay(1500); | |
200 | #endif | |
201 | ||
202 | olddelay = pi->delay; | |
203 | pi->delay = 10; | |
204 | ||
205 | pi->saved_r0 = r0(); | |
206 | pi->saved_r2 = r2(); | |
207 | ||
208 | w2(4); w0(4); w2(6); w2(7); | |
209 | a = r1() & 0xff; w2(4); b = r1() & 0xff; | |
210 | w2(0xc); w2(0xe); w2(4); | |
211 | ||
212 | pi->delay = olddelay; | |
213 | w0(pi->saved_r0); | |
214 | w2(pi->saved_r2); | |
215 | ||
216 | return ((~a&0x40) && (b&0x40)); | |
217 | } | |
218 | ||
219 | /* We use the pi->private to remember the result of the PNP test. | |
220 | To make this work, private = port*2 + chip. Yes, I know it's | |
221 | a hack :-( | |
222 | */ | |
223 | ||
224 | static int frpw_test_proto( PIA *pi, char * scratch, int verbose ) | |
225 | ||
226 | { int j, k, r; | |
227 | int e[2] = {0,0}; | |
228 | ||
229 | if ((pi->private>>1) != pi->port) | |
230 | pi->private = frpw_test_pnp(pi) + 2*pi->port; | |
231 | ||
232 | if (((pi->private%2) == 0) && (pi->mode > 2)) { | |
233 | if (verbose) | |
234 | printk("%s: frpw: Xilinx does not support mode %d\n", | |
235 | pi->device, pi->mode); | |
236 | return 1; | |
237 | } | |
238 | ||
239 | if (((pi->private%2) == 1) && (pi->mode == 2)) { | |
240 | if (verbose) | |
241 | printk("%s: frpw: ASIC does not support mode 2\n", | |
242 | pi->device); | |
243 | return 1; | |
244 | } | |
245 | ||
246 | frpw_connect(pi); | |
247 | for (j=0;j<2;j++) { | |
248 | frpw_write_regr(pi,0,6,0xa0+j*0x10); | |
249 | for (k=0;k<256;k++) { | |
250 | frpw_write_regr(pi,0,2,k^0xaa); | |
251 | frpw_write_regr(pi,0,3,k^0x55); | |
252 | if (frpw_read_regr(pi,0,2) != (k^0xaa)) e[j]++; | |
253 | } | |
254 | } | |
255 | frpw_disconnect(pi); | |
256 | ||
257 | frpw_connect(pi); | |
258 | frpw_read_block_int(pi,scratch,512,0x10); | |
259 | r = 0; | |
260 | for (k=0;k<128;k++) if (scratch[k] != k) r++; | |
261 | frpw_disconnect(pi); | |
262 | ||
263 | if (verbose) { | |
264 | printk("%s: frpw: port 0x%x, chip %ld, mode %d, test=(%d,%d,%d)\n", | |
265 | pi->device,pi->port,(pi->private%2),pi->mode,e[0],e[1],r); | |
266 | } | |
267 | ||
268 | return (r || (e[0] && e[1])); | |
269 | } | |
270 | ||
271 | ||
272 | static void frpw_log_adapter( PIA *pi, char * scratch, int verbose ) | |
273 | ||
274 | { char *mode_string[6] = {"4-bit","8-bit","EPP", | |
275 | "EPP-8","EPP-16","EPP-32"}; | |
276 | ||
277 | printk("%s: frpw %s, Freecom (%s) adapter at 0x%x, ", pi->device, | |
278 | FRPW_VERSION,((pi->private%2) == 0)?"Xilinx":"ASIC",pi->port); | |
279 | printk("mode %d (%s), delay %d\n",pi->mode, | |
280 | mode_string[pi->mode],pi->delay); | |
281 | ||
282 | } | |
283 | ||
284 | static struct pi_protocol frpw = { | |
285 | .owner = THIS_MODULE, | |
286 | .name = "frpw", | |
287 | .max_mode = 6, | |
288 | .epp_first = 2, | |
289 | .default_delay = 2, | |
290 | .max_units = 1, | |
291 | .write_regr = frpw_write_regr, | |
292 | .read_regr = frpw_read_regr, | |
293 | .write_block = frpw_write_block, | |
294 | .read_block = frpw_read_block, | |
295 | .connect = frpw_connect, | |
296 | .disconnect = frpw_disconnect, | |
297 | .test_proto = frpw_test_proto, | |
298 | .log_adapter = frpw_log_adapter, | |
299 | }; | |
300 | ||
301 | static int __init frpw_init(void) | |
302 | { | |
b4178ab5 | 303 | return paride_register(&frpw); |
1da177e4 LT |
304 | } |
305 | ||
306 | static void __exit frpw_exit(void) | |
307 | { | |
f4330002 | 308 | paride_unregister(&frpw); |
1da177e4 LT |
309 | } |
310 | ||
311 | MODULE_LICENSE("GPL"); | |
312 | module_init(frpw_init) | |
313 | module_exit(frpw_exit) |