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Commit | Line | Data |
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0882eaa6 DS |
1 | /* |
2 | comedi/drivers/das08_cs.c | |
3 | DAS08 driver | |
4 | ||
5 | COMEDI - Linux Control and Measurement Device Interface | |
6 | Copyright (C) 2000 David A. Schleef <ds@schleef.org> | |
7 | Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | ||
23 | ***************************************************************** | |
24 | ||
25 | */ | |
26 | /* | |
27 | Driver: das08_cs | |
28 | Description: DAS-08 PCMCIA boards | |
29 | Author: Warren Jasper, ds, Frank Hess | |
30 | Devices: [ComputerBoards] PCM-DAS08 (pcm-das08) | |
31 | Status: works | |
32 | ||
33 | This is the PCMCIA-specific support split off from the | |
34 | das08 driver. | |
35 | ||
36 | Options (for pcm-das08): | |
d539047c | 37 | NONE |
0882eaa6 DS |
38 | |
39 | Command support does not exist, but could be added for this board. | |
40 | */ | |
41 | ||
42 | #include "../comedidev.h" | |
43 | ||
44 | #include <linux/delay.h> | |
45 | #include <linux/pci.h> | |
5a0e3ad6 | 46 | #include <linux/slab.h> |
0882eaa6 DS |
47 | |
48 | #include "das08.h" | |
49 | ||
2696fb57 | 50 | /* pcmcia includes */ |
0882eaa6 DS |
51 | #include <pcmcia/cs_types.h> |
52 | #include <pcmcia/cs.h> | |
53 | #include <pcmcia/cistpl.h> | |
54 | #include <pcmcia/ds.h> | |
55 | ||
d539047c | 56 | static struct pcmcia_device *cur_dev; |
0882eaa6 DS |
57 | |
58 | #define thisboard ((const struct das08_board_struct *)dev->board_ptr) | |
59 | ||
0a85b6f0 MT |
60 | static int das08_cs_attach(struct comedi_device *dev, |
61 | struct comedi_devconfig *it); | |
0882eaa6 | 62 | |
139dfbdf | 63 | static struct comedi_driver driver_das08_cs = { |
68c3dbff BP |
64 | .driver_name = "das08_cs", |
65 | .module = THIS_MODULE, | |
66 | .attach = das08_cs_attach, | |
67 | .detach = das08_common_detach, | |
68 | .board_name = &das08_cs_boards[0].name, | |
b6ac1613 | 69 | .num_names = ARRAY_SIZE(das08_cs_boards), |
68c3dbff | 70 | .offset = sizeof(struct das08_board_struct), |
0882eaa6 DS |
71 | }; |
72 | ||
0a85b6f0 MT |
73 | static int das08_cs_attach(struct comedi_device *dev, |
74 | struct comedi_devconfig *it) | |
0882eaa6 DS |
75 | { |
76 | int ret; | |
77 | unsigned long iobase; | |
2696fb57 | 78 | struct pcmcia_device *link = cur_dev; /* XXX hack */ |
0882eaa6 | 79 | |
c3744138 BP |
80 | ret = alloc_private(dev, sizeof(struct das08_private_struct)); |
81 | if (ret < 0) | |
0882eaa6 DS |
82 | return ret; |
83 | ||
84 | printk("comedi%d: das08_cs: ", dev->minor); | |
2696fb57 | 85 | /* deal with a pci board */ |
0882eaa6 DS |
86 | |
87 | if (thisboard->bustype == pcmcia) { | |
88 | if (link == NULL) { | |
89 | printk(" no pcmcia cards found\n"); | |
90 | return -EIO; | |
91 | } | |
92 | iobase = link->io.BasePort1; | |
93 | } else { | |
94 | printk(" bug! board does not have PCMCIA bustype\n"); | |
95 | return -EINVAL; | |
96 | } | |
97 | ||
98 | printk("\n"); | |
99 | ||
100 | return das08_common_attach(dev, iobase); | |
101 | } | |
102 | ||
103 | /*====================================================================== | |
104 | ||
105 | The following pcmcia code for the pcm-das08 is adapted from the | |
106 | dummy_cs.c driver of the Linux PCMCIA Card Services package. | |
107 | ||
108 | The initial developer of the original code is David A. Hinds | |
109 | <dahinds@users.sourceforge.net>. Portions created by David A. Hinds | |
110 | are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
111 | ||
112 | ======================================================================*/ | |
113 | ||
0882eaa6 DS |
114 | static void das08_pcmcia_config(struct pcmcia_device *link); |
115 | static void das08_pcmcia_release(struct pcmcia_device *link); | |
116 | static int das08_pcmcia_suspend(struct pcmcia_device *p_dev); | |
117 | static int das08_pcmcia_resume(struct pcmcia_device *p_dev); | |
118 | ||
119 | /* | |
120 | The attach() and detach() entry points are used to create and destroy | |
121 | "instances" of the driver, where each instance represents everything | |
122 | needed to manage one actual PCMCIA card. | |
123 | */ | |
124 | ||
125 | static int das08_pcmcia_attach(struct pcmcia_device *); | |
126 | static void das08_pcmcia_detach(struct pcmcia_device *); | |
127 | ||
128 | /* | |
129 | You'll also need to prototype all the functions that will actually | |
130 | be used to talk to your device. See 'memory_cs' for a good example | |
131 | of a fully self-sufficient driver; the other drivers rely more or | |
132 | less on other parts of the kernel. | |
133 | */ | |
134 | ||
135 | /* | |
136 | The dev_info variable is the "key" that is used to match up this | |
137 | device driver with appropriate cards, through the card configuration | |
138 | database. | |
139 | */ | |
140 | ||
141 | static const dev_info_t dev_info = "pcm-das08"; | |
142 | ||
d8961467 | 143 | struct local_info_t { |
0882eaa6 DS |
144 | struct pcmcia_device *link; |
145 | dev_node_t node; | |
146 | int stop; | |
147 | struct bus_operations *bus; | |
d8961467 | 148 | }; |
0882eaa6 DS |
149 | |
150 | /*====================================================================== | |
151 | ||
152 | das08_pcmcia_attach() creates an "instance" of the driver, allocating | |
153 | local data structures for one device. The device is registered | |
154 | with Card Services. | |
155 | ||
156 | The dev_link structure is initialized, but we don't actually | |
157 | configure the card at this point -- we wait until we receive a | |
158 | card insertion event. | |
159 | ||
160 | ======================================================================*/ | |
161 | ||
162 | static int das08_pcmcia_attach(struct pcmcia_device *link) | |
163 | { | |
d8961467 | 164 | struct local_info_t *local; |
0882eaa6 | 165 | |
55a19b39 | 166 | dev_dbg(&link->dev, "das08_pcmcia_attach()\n"); |
0882eaa6 DS |
167 | |
168 | /* Allocate space for private device-specific data */ | |
d8961467 | 169 | local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL); |
0882eaa6 DS |
170 | if (!local) |
171 | return -ENOMEM; | |
172 | local->link = link; | |
173 | link->priv = local; | |
174 | ||
175 | /* Interrupt setup */ | |
176 | link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; | |
0882eaa6 DS |
177 | link->irq.Handler = NULL; |
178 | ||
179 | /* | |
180 | General socket configuration defaults can go here. In this | |
181 | client, we assume very little, and rely on the CIS for almost | |
182 | everything. In most clients, many details (i.e., number, sizes, | |
183 | and attributes of IO windows) are fixed by the nature of the | |
184 | device, and can be hard-wired here. | |
185 | */ | |
186 | link->conf.Attributes = 0; | |
187 | link->conf.IntType = INT_MEMORY_AND_IO; | |
188 | ||
189 | cur_dev = link; | |
190 | ||
191 | das08_pcmcia_config(link); | |
192 | ||
193 | return 0; | |
194 | } /* das08_pcmcia_attach */ | |
195 | ||
196 | /*====================================================================== | |
197 | ||
198 | This deletes a driver "instance". The device is de-registered | |
199 | with Card Services. If it has been released, all local data | |
200 | structures are freed. Otherwise, the structures will be freed | |
201 | when the device is released. | |
202 | ||
203 | ======================================================================*/ | |
204 | ||
205 | static void das08_pcmcia_detach(struct pcmcia_device *link) | |
206 | { | |
207 | ||
55a19b39 | 208 | dev_dbg(&link->dev, "das08_pcmcia_detach\n"); |
0882eaa6 DS |
209 | |
210 | if (link->dev_node) { | |
0a85b6f0 | 211 | ((struct local_info_t *)link->priv)->stop = 1; |
0882eaa6 DS |
212 | das08_pcmcia_release(link); |
213 | } | |
214 | ||
d8961467 | 215 | /* This points to the parent struct local_info_t struct */ |
0882eaa6 DS |
216 | if (link->priv) |
217 | kfree(link->priv); | |
218 | ||
219 | } /* das08_pcmcia_detach */ | |
220 | ||
55a19b39 DB |
221 | |
222 | static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev, | |
223 | cistpl_cftable_entry_t *cfg, | |
224 | cistpl_cftable_entry_t *dflt, | |
225 | unsigned int vcc, | |
226 | void *priv_data) | |
227 | { | |
228 | if (cfg->index == 0) | |
229 | return -ENODEV; | |
230 | ||
231 | /* Do we need to allocate an interrupt? */ | |
232 | if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1) | |
233 | p_dev->conf.Attributes |= CONF_ENABLE_IRQ; | |
234 | ||
235 | /* IO window settings */ | |
236 | p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0; | |
237 | if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) { | |
238 | cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io; | |
239 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; | |
240 | if (!(io->flags & CISTPL_IO_8BIT)) | |
241 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16; | |
242 | if (!(io->flags & CISTPL_IO_16BIT)) | |
243 | p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
244 | p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; | |
245 | p_dev->io.BasePort1 = io->win[0].base; | |
246 | p_dev->io.NumPorts1 = io->win[0].len; | |
247 | if (io->nwin > 1) { | |
248 | p_dev->io.Attributes2 = p_dev->io.Attributes1; | |
249 | p_dev->io.BasePort2 = io->win[1].base; | |
250 | p_dev->io.NumPorts2 = io->win[1].len; | |
251 | } | |
252 | /* This reserves IO space but doesn't actually enable it */ | |
253 | return pcmcia_request_io(p_dev, &p_dev->io); | |
254 | } | |
255 | return 0; | |
256 | } | |
257 | ||
258 | ||
0882eaa6 DS |
259 | /*====================================================================== |
260 | ||
261 | das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event | |
262 | is received, to configure the PCMCIA socket, and to make the | |
263 | device available to the system. | |
264 | ||
265 | ======================================================================*/ | |
266 | ||
267 | static void das08_pcmcia_config(struct pcmcia_device *link) | |
268 | { | |
d8961467 | 269 | struct local_info_t *dev = link->priv; |
55a19b39 | 270 | int ret; |
0882eaa6 | 271 | |
55a19b39 | 272 | dev_dbg(&link->dev, "das08_pcmcia_config\n"); |
c3744138 | 273 | |
55a19b39 DB |
274 | ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL); |
275 | if (ret) { | |
276 | dev_warn(&link->dev, "no configuration found\n"); | |
277 | goto failed; | |
0882eaa6 DS |
278 | } |
279 | ||
280 | if (link->conf.Attributes & CONF_ENABLE_IRQ) { | |
55a19b39 DB |
281 | ret = pcmcia_request_irq(link, &link->irq); |
282 | if (ret) | |
283 | goto failed; | |
0882eaa6 DS |
284 | } |
285 | ||
286 | /* | |
287 | This actually configures the PCMCIA socket -- setting up | |
288 | the I/O windows and the interrupt mapping, and putting the | |
289 | card and host interface into "Memory and IO" mode. | |
290 | */ | |
55a19b39 DB |
291 | ret = pcmcia_request_configuration(link, &link->conf); |
292 | if (ret) | |
293 | goto failed; | |
0882eaa6 DS |
294 | |
295 | /* | |
296 | At this point, the dev_node_t structure(s) need to be | |
297 | initialized and arranged in a linked list at link->dev. | |
298 | */ | |
299 | sprintf(dev->node.dev_name, "pcm-das08"); | |
300 | dev->node.major = dev->node.minor = 0; | |
301 | link->dev_node = &dev->node; | |
302 | ||
303 | /* Finally, report what we've done */ | |
304 | printk(KERN_INFO "%s: index 0x%02x", | |
0a85b6f0 | 305 | dev->node.dev_name, link->conf.ConfigIndex); |
0882eaa6 DS |
306 | if (link->conf.Attributes & CONF_ENABLE_IRQ) |
307 | printk(", irq %u", link->irq.AssignedIRQ); | |
308 | if (link->io.NumPorts1) | |
309 | printk(", io 0x%04x-0x%04x", link->io.BasePort1, | |
0a85b6f0 | 310 | link->io.BasePort1 + link->io.NumPorts1 - 1); |
0882eaa6 DS |
311 | if (link->io.NumPorts2) |
312 | printk(" & 0x%04x-0x%04x", link->io.BasePort2, | |
0a85b6f0 | 313 | link->io.BasePort2 + link->io.NumPorts2 - 1); |
0882eaa6 DS |
314 | printk("\n"); |
315 | ||
316 | return; | |
317 | ||
55a19b39 | 318 | failed: |
0882eaa6 DS |
319 | das08_pcmcia_release(link); |
320 | ||
321 | } /* das08_pcmcia_config */ | |
322 | ||
323 | /*====================================================================== | |
324 | ||
325 | After a card is removed, das08_pcmcia_release() will unregister the | |
326 | device, and release the PCMCIA configuration. If the device is | |
327 | still open, this will be postponed until it is closed. | |
328 | ||
329 | ======================================================================*/ | |
330 | ||
331 | static void das08_pcmcia_release(struct pcmcia_device *link) | |
332 | { | |
55a19b39 | 333 | dev_dbg(&link->dev, "das08_pcmcia_release\n"); |
0882eaa6 DS |
334 | pcmcia_disable_device(link); |
335 | } /* das08_pcmcia_release */ | |
336 | ||
337 | /*====================================================================== | |
338 | ||
339 | The card status event handler. Mostly, this schedules other | |
340 | stuff to run after an event is received. | |
341 | ||
342 | When a CARD_REMOVAL event is received, we immediately set a | |
343 | private flag to block future accesses to this device. All the | |
344 | functions that actually access the device should check this flag | |
345 | to make sure the card is still present. | |
346 | ||
347 | ======================================================================*/ | |
348 | ||
349 | static int das08_pcmcia_suspend(struct pcmcia_device *link) | |
350 | { | |
d8961467 | 351 | struct local_info_t *local = link->priv; |
0882eaa6 DS |
352 | /* Mark the device as stopped, to block IO until later */ |
353 | local->stop = 1; | |
354 | ||
355 | return 0; | |
356 | } /* das08_pcmcia_suspend */ | |
357 | ||
358 | static int das08_pcmcia_resume(struct pcmcia_device *link) | |
359 | { | |
d8961467 | 360 | struct local_info_t *local = link->priv; |
0882eaa6 DS |
361 | |
362 | local->stop = 0; | |
363 | return 0; | |
364 | } /* das08_pcmcia_resume */ | |
365 | ||
366 | /*====================================================================*/ | |
367 | ||
368 | static struct pcmcia_device_id das08_cs_id_table[] = { | |
369 | PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001), | |
370 | PCMCIA_DEVICE_NULL | |
371 | }; | |
372 | ||
373 | MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table); | |
374 | ||
375 | struct pcmcia_driver das08_cs_driver = { | |
376 | .probe = das08_pcmcia_attach, | |
377 | .remove = das08_pcmcia_detach, | |
378 | .suspend = das08_pcmcia_suspend, | |
379 | .resume = das08_pcmcia_resume, | |
380 | .id_table = das08_cs_id_table, | |
381 | .owner = THIS_MODULE, | |
382 | .drv = { | |
0a85b6f0 | 383 | .name = dev_info, |
0882eaa6 DS |
384 | }, |
385 | }; | |
386 | ||
387 | static int __init init_das08_pcmcia_cs(void) | |
388 | { | |
0882eaa6 DS |
389 | pcmcia_register_driver(&das08_cs_driver); |
390 | return 0; | |
391 | } | |
392 | ||
393 | static void __exit exit_das08_pcmcia_cs(void) | |
394 | { | |
55a19b39 | 395 | pr_debug("das08_pcmcia_cs: unloading\n"); |
0882eaa6 DS |
396 | pcmcia_unregister_driver(&das08_cs_driver); |
397 | } | |
398 | ||
399 | static int __init das08_cs_init_module(void) | |
400 | { | |
401 | int ret; | |
402 | ||
403 | ret = init_das08_pcmcia_cs(); | |
404 | if (ret < 0) | |
405 | return ret; | |
406 | ||
407 | return comedi_driver_register(&driver_das08_cs); | |
408 | } | |
409 | ||
410 | static void __exit das08_cs_exit_module(void) | |
411 | { | |
412 | exit_das08_pcmcia_cs(); | |
413 | comedi_driver_unregister(&driver_das08_cs); | |
414 | } | |
415 | ||
416 | MODULE_LICENSE("GPL"); | |
417 | module_init(das08_cs_init_module); | |
418 | module_exit(das08_cs_exit_module); |