Commit | Line | Data |
---|---|---|
48f16b6a OS |
1 | /* |
2 | Some comments on the code.. | |
3 | ||
4 | - it shouldn't be necessary to use outb_p(). | |
5 | ||
6 | - ignoreirq creates a race condition. It needs to be fixed. | |
7 | ||
8 | */ | |
9 | ||
10 | /* | |
11 | comedi/drivers/das6402.c | |
12 | An experimental driver for Computerboards' DAS6402 I/O card | |
13 | ||
14 | Copyright (C) 1999 Oystein Svendsen <svendsen@pvv.org> | |
15 | ||
16 | This program is free software; you can redistribute it and/or modify | |
17 | it under the terms of the GNU General Public License as published by | |
18 | the Free Software Foundation; either version 2 of the License, or | |
19 | (at your option) any later version. | |
20 | ||
21 | This program is distributed in the hope that it will be useful, | |
22 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | GNU General Public License for more details. | |
25 | ||
26 | You should have received a copy of the GNU General Public License | |
27 | along with this program; if not, write to the Free Software | |
28 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
29 | ||
30 | */ | |
31 | /* | |
32 | Driver: das6402 | |
33 | Description: Keithley Metrabyte DAS6402 (& compatibles) | |
34 | Author: Oystein Svendsen <svendsen@pvv.org> | |
35 | Status: bitrotten | |
36 | Devices: [Keithley Metrabyte] DAS6402 (das6402) | |
37 | ||
38 | This driver has suffered bitrot. | |
39 | */ | |
40 | ||
25436dc9 | 41 | #include <linux/interrupt.h> |
48f16b6a OS |
42 | #include "../comedidev.h" |
43 | ||
44 | #include <linux/ioport.h> | |
45 | ||
46 | #define DAS6402_SIZE 16 | |
47 | ||
ecd89ddc | 48 | #define N_WORDS (3000*64) |
48f16b6a OS |
49 | |
50 | #define STOP 0 | |
51 | #define START 1 | |
52 | ||
53 | #define SCANL 0x3f00 | |
54 | #define BYTE unsigned char | |
55 | #define WORD unsigned short | |
56 | ||
57 | /*----- register 8 ----*/ | |
58 | #define CLRINT 0x01 | |
59 | #define CLRXTR 0x02 | |
60 | #define CLRXIN 0x04 | |
61 | #define EXTEND 0x10 | |
62 | #define ARMED 0x20 /* enable conting of post sample conv */ | |
63 | #define POSTMODE 0x40 | |
64 | #define MHZ 0x80 /* 10 MHz clock */ | |
65 | /*---------------------*/ | |
66 | ||
67 | /*----- register 9 ----*/ | |
68 | #define IRQ (0x04 << 4) /* these two are */ | |
69 | #define IRQV 10 /* dependent on each other */ | |
70 | ||
71 | #define CONVSRC 0x03 /* trig src is Intarnal pacer */ | |
72 | #define BURSTEN 0x04 /* enable burst */ | |
73 | #define XINTE 0x08 /* use external int. trig */ | |
74 | #define INTE 0x80 /* enable analog interrupts */ | |
75 | /*---------------------*/ | |
76 | ||
77 | /*----- register 10 ---*/ | |
78 | #define TGEN 0x01 /* Use pin DI1 for externl trigging? */ | |
79 | #define TGSEL 0x02 /* Use edge triggering */ | |
80 | #define TGPOL 0x04 /* active edge is falling */ | |
81 | #define PRETRIG 0x08 /* pretrig */ | |
82 | /*---------------------*/ | |
83 | ||
84 | /*----- register 11 ---*/ | |
85 | #define EOB 0x0c | |
86 | #define FIFOHFULL 0x08 | |
87 | #define GAIN 0x01 | |
88 | #define FIFONEPTY 0x04 | |
89 | #define MODE 0x10 | |
90 | #define SEM 0x20 | |
91 | #define BIP 0x40 | |
92 | /*---------------------*/ | |
93 | ||
94 | #define M0 0x00 | |
95 | #define M2 0x04 | |
96 | ||
97 | #define C0 0x00 | |
98 | #define C1 0x40 | |
99 | #define C2 0x80 | |
100 | #define RWLH 0x30 | |
101 | ||
0a85b6f0 MT |
102 | static int das6402_attach(struct comedi_device *dev, |
103 | struct comedi_devconfig *it); | |
da91b269 | 104 | static int das6402_detach(struct comedi_device *dev); |
139dfbdf | 105 | static struct comedi_driver driver_das6402 = { |
68c3dbff BP |
106 | .driver_name = "das6402", |
107 | .module = THIS_MODULE, | |
108 | .attach = das6402_attach, | |
109 | .detach = das6402_detach, | |
48f16b6a OS |
110 | }; |
111 | ||
112 | COMEDI_INITCLEANUP(driver_das6402); | |
113 | ||
c7b8bb98 | 114 | struct das6402_private { |
48f16b6a OS |
115 | int ai_bytes_to_read; |
116 | ||
117 | int das6402_ignoreirq; | |
c7b8bb98 BP |
118 | }; |
119 | #define devpriv ((struct das6402_private *)dev->private) | |
48f16b6a | 120 | |
0a85b6f0 MT |
121 | static void das6402_ai_fifo_dregs(struct comedi_device *dev, |
122 | struct comedi_subdevice *s); | |
48f16b6a | 123 | |
da91b269 | 124 | static void das6402_setcounter(struct comedi_device *dev) |
48f16b6a OS |
125 | { |
126 | BYTE p; | |
127 | unsigned short ctrlwrd; | |
128 | ||
129 | /* set up counter0 first, mode 0 */ | |
130 | p = M0 | C0 | RWLH; | |
131 | outb_p(p, dev->iobase + 15); | |
132 | ctrlwrd = 2000; | |
133 | p = (BYTE) (0xff & ctrlwrd); | |
134 | outb_p(p, dev->iobase + 12); | |
135 | p = (BYTE) (0xff & (ctrlwrd >> 8)); | |
136 | outb_p(p, dev->iobase + 12); | |
137 | ||
138 | /* set up counter1, mode 2 */ | |
139 | p = M2 | C1 | RWLH; | |
140 | outb_p(p, dev->iobase + 15); | |
141 | ctrlwrd = 10; | |
142 | p = (BYTE) (0xff & ctrlwrd); | |
143 | outb_p(p, dev->iobase + 13); | |
144 | p = (BYTE) (0xff & (ctrlwrd >> 8)); | |
145 | outb_p(p, dev->iobase + 13); | |
146 | ||
147 | /* set up counter1, mode 2 */ | |
148 | p = M2 | C2 | RWLH; | |
149 | outb_p(p, dev->iobase + 15); | |
150 | ctrlwrd = 1000; | |
151 | p = (BYTE) (0xff & ctrlwrd); | |
152 | outb_p(p, dev->iobase + 14); | |
153 | p = (BYTE) (0xff & (ctrlwrd >> 8)); | |
154 | outb_p(p, dev->iobase + 14); | |
155 | } | |
156 | ||
70265d24 | 157 | static irqreturn_t intr_handler(int irq, void *d) |
48f16b6a | 158 | { |
71b5f4f1 | 159 | struct comedi_device *dev = d; |
34c43922 | 160 | struct comedi_subdevice *s = dev->subdevices; |
48f16b6a OS |
161 | |
162 | if (!dev->attached || devpriv->das6402_ignoreirq) { | |
163 | printk("das6402: BUG: spurious interrupt\n"); | |
164 | return IRQ_HANDLED; | |
165 | } | |
166 | #ifdef DEBUG | |
167 | printk("das6402: interrupt! das6402_irqcount=%i\n", | |
0a85b6f0 | 168 | devpriv->das6402_irqcount); |
48f16b6a OS |
169 | printk("das6402: iobase+2=%i\n", inw_p(dev->iobase + 2)); |
170 | #endif | |
171 | ||
172 | das6402_ai_fifo_dregs(dev, s); | |
173 | ||
174 | if (s->async->buf_write_count >= devpriv->ai_bytes_to_read) { | |
175 | outw_p(SCANL, dev->iobase + 2); /* clears the fifo */ | |
176 | outb(0x07, dev->iobase + 8); /* clears all flip-flops */ | |
177 | #ifdef DEBUG | |
178 | printk("das6402: Got %i samples\n\n", | |
0a85b6f0 | 179 | devpriv->das6402_wordsread - diff); |
48f16b6a OS |
180 | #endif |
181 | s->async->events |= COMEDI_CB_EOA; | |
182 | comedi_event(dev, s); | |
183 | } | |
184 | ||
185 | outb(0x01, dev->iobase + 8); /* clear only the interrupt flip-flop */ | |
186 | ||
187 | comedi_event(dev, s); | |
188 | return IRQ_HANDLED; | |
189 | } | |
190 | ||
191 | #if 0 | |
da91b269 | 192 | static void das6402_ai_fifo_read(struct comedi_device *dev, short *data, int n) |
48f16b6a OS |
193 | { |
194 | int i; | |
195 | ||
196 | for (i = 0; i < n; i++) | |
197 | data[i] = inw(dev->iobase); | |
198 | } | |
199 | #endif | |
200 | ||
0a85b6f0 MT |
201 | static void das6402_ai_fifo_dregs(struct comedi_device *dev, |
202 | struct comedi_subdevice *s) | |
48f16b6a OS |
203 | { |
204 | while (1) { | |
205 | if (!(inb(dev->iobase + 8) & 0x01)) | |
206 | return; | |
207 | comedi_buf_put(s->async, inw(dev->iobase)); | |
208 | } | |
209 | } | |
210 | ||
0a85b6f0 MT |
211 | static int das6402_ai_cancel(struct comedi_device *dev, |
212 | struct comedi_subdevice *s) | |
48f16b6a OS |
213 | { |
214 | /* | |
215 | * This function should reset the board from whatever condition it | |
216 | * is in (i.e., acquiring data), to a non-active state. | |
217 | */ | |
218 | ||
219 | devpriv->das6402_ignoreirq = 1; | |
220 | #ifdef DEBUG | |
221 | printk("das6402: Stopping acquisition\n"); | |
222 | #endif | |
223 | devpriv->das6402_ignoreirq = 1; | |
224 | outb_p(0x02, dev->iobase + 10); /* disable external trigging */ | |
225 | outw_p(SCANL, dev->iobase + 2); /* resets the card fifo */ | |
226 | outb_p(0, dev->iobase + 9); /* disables interrupts */ | |
227 | ||
228 | outw_p(SCANL, dev->iobase + 2); | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
233 | #ifdef unused | |
0a85b6f0 MT |
234 | static int das6402_ai_mode2(struct comedi_device *dev, |
235 | struct comedi_subdevice *s, comedi_trig * it) | |
48f16b6a OS |
236 | { |
237 | devpriv->das6402_ignoreirq = 1; | |
238 | ||
239 | #ifdef DEBUG | |
240 | printk("das6402: Starting acquisition\n"); | |
241 | #endif | |
242 | outb_p(0x03, dev->iobase + 10); /* enable external trigging */ | |
243 | outw_p(SCANL, dev->iobase + 2); /* resets the card fifo */ | |
244 | outb_p(IRQ | CONVSRC | BURSTEN | INTE, dev->iobase + 9); | |
245 | ||
790c5541 | 246 | devpriv->ai_bytes_to_read = it->n * sizeof(short); |
48f16b6a OS |
247 | |
248 | /* um... ignoreirq is a nasty race condition */ | |
249 | devpriv->das6402_ignoreirq = 0; | |
250 | ||
251 | outw_p(SCANL, dev->iobase + 2); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | #endif | |
256 | ||
da91b269 | 257 | static int board_init(struct comedi_device *dev) |
48f16b6a OS |
258 | { |
259 | BYTE b; | |
260 | ||
261 | devpriv->das6402_ignoreirq = 1; | |
262 | ||
263 | outb(0x07, dev->iobase + 8); | |
264 | ||
265 | /* register 11 */ | |
266 | outb_p(MODE, dev->iobase + 11); | |
267 | b = BIP | SEM | MODE | GAIN | FIFOHFULL; | |
268 | outb_p(b, dev->iobase + 11); | |
269 | ||
270 | /* register 8 */ | |
271 | outb_p(EXTEND, dev->iobase + 8); | |
272 | b = EXTEND | MHZ; | |
273 | outb_p(b, dev->iobase + 8); | |
274 | b = MHZ | CLRINT | CLRXTR | CLRXIN; | |
275 | outb_p(b, dev->iobase + 8); | |
276 | ||
277 | /* register 9 */ | |
278 | b = IRQ | CONVSRC | BURSTEN | INTE; | |
279 | outb_p(b, dev->iobase + 9); | |
280 | ||
281 | /* register 10 */ | |
282 | b = TGSEL | TGEN; | |
283 | outb_p(b, dev->iobase + 10); | |
284 | ||
285 | b = 0x07; | |
286 | outb_p(b, dev->iobase + 8); | |
287 | ||
288 | das6402_setcounter(dev); | |
289 | ||
290 | outw_p(SCANL, dev->iobase + 2); /* reset card fifo */ | |
291 | ||
292 | devpriv->das6402_ignoreirq = 0; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
da91b269 | 297 | static int das6402_detach(struct comedi_device *dev) |
48f16b6a OS |
298 | { |
299 | if (dev->irq) | |
5f74ea14 | 300 | free_irq(dev->irq, dev); |
48f16b6a OS |
301 | if (dev->iobase) |
302 | release_region(dev->iobase, DAS6402_SIZE); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
0a85b6f0 MT |
307 | static int das6402_attach(struct comedi_device *dev, |
308 | struct comedi_devconfig *it) | |
48f16b6a OS |
309 | { |
310 | unsigned int irq; | |
311 | unsigned long iobase; | |
312 | int ret; | |
34c43922 | 313 | struct comedi_subdevice *s; |
48f16b6a OS |
314 | |
315 | dev->board_name = "das6402"; | |
316 | ||
317 | iobase = it->options[0]; | |
318 | if (iobase == 0) | |
319 | iobase = 0x300; | |
320 | ||
321 | printk("comedi%d: das6402: 0x%04lx", dev->minor, iobase); | |
322 | ||
323 | if (!request_region(iobase, DAS6402_SIZE, "das6402")) { | |
324 | printk(" I/O port conflict\n"); | |
325 | return -EIO; | |
326 | } | |
327 | dev->iobase = iobase; | |
328 | ||
329 | /* should do a probe here */ | |
330 | ||
331 | irq = it->options[0]; | |
332 | printk(" ( irq = %u )", irq); | |
5f74ea14 | 333 | ret = request_irq(irq, intr_handler, 0, "das6402", dev); |
48f16b6a OS |
334 | if (ret < 0) { |
335 | printk("irq conflict\n"); | |
336 | return ret; | |
337 | } | |
338 | dev->irq = irq; | |
339 | ||
c3744138 BP |
340 | ret = alloc_private(dev, sizeof(struct das6402_private)); |
341 | if (ret < 0) | |
48f16b6a OS |
342 | return ret; |
343 | ||
c3744138 BP |
344 | ret = alloc_subdevices(dev, 1); |
345 | if (ret < 0) | |
48f16b6a OS |
346 | return ret; |
347 | ||
348 | /* ai subdevice */ | |
349 | s = dev->subdevices + 0; | |
350 | s->type = COMEDI_SUBD_AI; | |
351 | s->subdev_flags = SDF_READABLE | SDF_GROUND; | |
352 | s->n_chan = 8; | |
2696fb57 | 353 | /* s->trig[2]=das6402_ai_mode2; */ |
48f16b6a OS |
354 | s->cancel = das6402_ai_cancel; |
355 | s->maxdata = (1 << 12) - 1; | |
356 | s->len_chanlist = 16; /* ? */ | |
357 | s->range_table = &range_unknown; | |
358 | ||
359 | board_init(dev); | |
360 | ||
361 | return 0; | |
362 | } |