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1da177e4 LT |
1 | /*====================================================================== |
2 | ||
3 | A driver for PCMCIA parallel port adapters | |
4 | ||
5 | (specifically, for the Quatech SPP-100 EPP card: other cards will | |
6 | probably require driver tweaks) | |
7 | ||
8 | parport_cs.c 1.29 2002/10/11 06:57:41 | |
9 | ||
10 | The contents of this file are subject to the Mozilla Public | |
11 | License Version 1.1 (the "License"); you may not use this file | |
12 | except in compliance with the License. You may obtain a copy of | |
13 | the License at http://www.mozilla.org/MPL/ | |
14 | ||
15 | Software distributed under the License is distributed on an "AS | |
16 | IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | |
17 | implied. See the License for the specific language governing | |
18 | rights and limitations under the License. | |
19 | ||
20 | The initial developer of the original code is David A. Hinds | |
21 | <dahinds@users.sourceforge.net>. Portions created by David A. Hinds | |
22 | are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
23 | ||
24 | Alternatively, the contents of this file may be used under the | |
25 | terms of the GNU General Public License version 2 (the "GPL"), in | |
26 | which case the provisions of the GPL are applicable instead of the | |
27 | above. If you wish to allow the use of your version of this file | |
28 | only under the terms of the GPL and not to allow others to use | |
29 | your version of this file under the MPL, indicate your decision | |
30 | by deleting the provisions above and replace them with the notice | |
31 | and other provisions required by the GPL. If you do not delete | |
32 | the provisions above, a recipient may use your version of this | |
33 | file under either the MPL or the GPL. | |
34 | ||
35 | ======================================================================*/ | |
36 | ||
37 | #include <linux/kernel.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/init.h> | |
40 | #include <linux/sched.h> | |
41 | #include <linux/ptrace.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/string.h> | |
44 | #include <linux/timer.h> | |
45 | #include <linux/ioport.h> | |
46 | #include <linux/major.h> | |
47 | ||
48 | #include <linux/parport.h> | |
49 | #include <linux/parport_pc.h> | |
50 | ||
51 | #include <pcmcia/version.h> | |
52 | #include <pcmcia/cs_types.h> | |
53 | #include <pcmcia/cs.h> | |
54 | #include <pcmcia/cistpl.h> | |
55 | #include <pcmcia/ds.h> | |
56 | #include <pcmcia/cisreg.h> | |
57 | #include <pcmcia/ciscode.h> | |
58 | ||
59 | /*====================================================================*/ | |
60 | ||
61 | /* Module parameters */ | |
62 | ||
63 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
64 | MODULE_DESCRIPTION("PCMCIA parallel port card driver"); | |
65 | MODULE_LICENSE("Dual MPL/GPL"); | |
66 | ||
67 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0) | |
68 | ||
69 | INT_MODULE_PARM(epp_mode, 1); | |
70 | ||
71 | #ifdef PCMCIA_DEBUG | |
72 | INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG); | |
73 | #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) | |
74 | static char *version = | |
75 | "parport_cs.c 1.29 2002/10/11 06:57:41 (David Hinds)"; | |
76 | #else | |
77 | #define DEBUG(n, args...) | |
78 | #endif | |
79 | ||
80 | /*====================================================================*/ | |
81 | ||
82 | #define FORCE_EPP_MODE 0x08 | |
83 | ||
84 | typedef struct parport_info_t { | |
85 | dev_link_t link; | |
86 | int ndev; | |
87 | dev_node_t node; | |
88 | struct parport *port; | |
89 | } parport_info_t; | |
90 | ||
91 | static dev_link_t *parport_attach(void); | |
92 | static void parport_detach(dev_link_t *); | |
93 | static void parport_config(dev_link_t *link); | |
94 | static void parport_cs_release(dev_link_t *); | |
95 | static int parport_event(event_t event, int priority, | |
96 | event_callback_args_t *args); | |
97 | ||
98 | static dev_info_t dev_info = "parport_cs"; | |
99 | static dev_link_t *dev_list = NULL; | |
100 | ||
101 | /*====================================================================== | |
102 | ||
103 | parport_attach() creates an "instance" of the driver, allocating | |
104 | local data structures for one device. The device is registered | |
105 | with Card Services. | |
106 | ||
107 | ======================================================================*/ | |
108 | ||
109 | static dev_link_t *parport_attach(void) | |
110 | { | |
111 | parport_info_t *info; | |
112 | dev_link_t *link; | |
113 | client_reg_t client_reg; | |
114 | int ret; | |
115 | ||
116 | DEBUG(0, "parport_attach()\n"); | |
117 | ||
118 | /* Create new parport device */ | |
119 | info = kmalloc(sizeof(*info), GFP_KERNEL); | |
120 | if (!info) return NULL; | |
121 | memset(info, 0, sizeof(*info)); | |
122 | link = &info->link; link->priv = info; | |
123 | ||
124 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; | |
125 | link->io.Attributes2 = IO_DATA_PATH_WIDTH_8; | |
126 | link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; | |
127 | link->irq.IRQInfo1 = IRQ_LEVEL_ID; | |
128 | link->conf.Attributes = CONF_ENABLE_IRQ; | |
129 | link->conf.Vcc = 50; | |
130 | link->conf.IntType = INT_MEMORY_AND_IO; | |
131 | ||
132 | /* Register with Card Services */ | |
133 | link->next = dev_list; | |
134 | dev_list = link; | |
135 | client_reg.dev_info = &dev_info; | |
136 | client_reg.EventMask = | |
137 | CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL | | |
138 | CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET | | |
139 | CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME; | |
140 | client_reg.event_handler = &parport_event; | |
141 | client_reg.Version = 0x0210; | |
142 | client_reg.event_callback_args.client_data = link; | |
143 | ret = pcmcia_register_client(&link->handle, &client_reg); | |
144 | if (ret != CS_SUCCESS) { | |
145 | cs_error(link->handle, RegisterClient, ret); | |
146 | parport_detach(link); | |
147 | return NULL; | |
148 | } | |
149 | ||
150 | return link; | |
151 | } /* parport_attach */ | |
152 | ||
153 | /*====================================================================== | |
154 | ||
155 | This deletes a driver "instance". The device is de-registered | |
156 | with Card Services. If it has been released, all local data | |
157 | structures are freed. Otherwise, the structures will be freed | |
158 | when the device is released. | |
159 | ||
160 | ======================================================================*/ | |
161 | ||
162 | static void parport_detach(dev_link_t *link) | |
163 | { | |
164 | dev_link_t **linkp; | |
165 | int ret; | |
166 | ||
167 | DEBUG(0, "parport_detach(0x%p)\n", link); | |
168 | ||
169 | /* Locate device structure */ | |
170 | for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) | |
171 | if (*linkp == link) break; | |
172 | if (*linkp == NULL) | |
173 | return; | |
174 | ||
175 | if (link->state & DEV_CONFIG) | |
176 | parport_cs_release(link); | |
177 | ||
178 | if (link->handle) { | |
179 | ret = pcmcia_deregister_client(link->handle); | |
180 | if (ret != CS_SUCCESS) | |
181 | cs_error(link->handle, DeregisterClient, ret); | |
182 | } | |
183 | ||
184 | /* Unlink, free device structure */ | |
185 | *linkp = link->next; | |
186 | kfree(link->priv); | |
187 | ||
188 | } /* parport_detach */ | |
189 | ||
190 | /*====================================================================== | |
191 | ||
192 | parport_config() is scheduled to run after a CARD_INSERTION event | |
193 | is received, to configure the PCMCIA socket, and to make the | |
194 | parport device available to the system. | |
195 | ||
196 | ======================================================================*/ | |
197 | ||
198 | #define CS_CHECK(fn, ret) \ | |
199 | do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) | |
200 | ||
201 | void parport_config(dev_link_t *link) | |
202 | { | |
203 | client_handle_t handle = link->handle; | |
204 | parport_info_t *info = link->priv; | |
205 | tuple_t tuple; | |
206 | u_short buf[128]; | |
207 | cisparse_t parse; | |
208 | config_info_t conf; | |
209 | cistpl_cftable_entry_t *cfg = &parse.cftable_entry; | |
210 | cistpl_cftable_entry_t dflt = { 0 }; | |
211 | struct parport *p; | |
212 | int last_ret, last_fn; | |
213 | ||
214 | DEBUG(0, "parport_config(0x%p)\n", link); | |
215 | ||
216 | tuple.TupleData = (cisdata_t *)buf; | |
217 | tuple.TupleOffset = 0; tuple.TupleDataMax = 255; | |
218 | tuple.Attributes = 0; | |
219 | tuple.DesiredTuple = CISTPL_CONFIG; | |
220 | CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); | |
221 | CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple)); | |
222 | CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse)); | |
223 | link->conf.ConfigBase = parse.config.base; | |
224 | link->conf.Present = parse.config.rmask[0]; | |
225 | ||
226 | /* Configure card */ | |
227 | link->state |= DEV_CONFIG; | |
228 | ||
229 | /* Not sure if this is right... look up the current Vcc */ | |
230 | CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf)); | |
231 | ||
232 | tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; | |
233 | tuple.Attributes = 0; | |
234 | CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple)); | |
235 | while (1) { | |
236 | if (pcmcia_get_tuple_data(handle, &tuple) != 0 || | |
237 | pcmcia_parse_tuple(handle, &tuple, &parse) != 0) | |
238 | goto next_entry; | |
239 | ||
240 | if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) { | |
241 | cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io; | |
242 | link->conf.ConfigIndex = cfg->index; | |
243 | if (epp_mode) | |
244 | link->conf.ConfigIndex |= FORCE_EPP_MODE; | |
245 | link->io.BasePort1 = io->win[0].base; | |
246 | link->io.NumPorts1 = io->win[0].len; | |
247 | link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; | |
248 | if (io->nwin == 2) { | |
249 | link->io.BasePort2 = io->win[1].base; | |
250 | link->io.NumPorts2 = io->win[1].len; | |
251 | } | |
252 | if (pcmcia_request_io(link->handle, &link->io) != 0) | |
253 | goto next_entry; | |
254 | /* If we've got this far, we're done */ | |
255 | break; | |
256 | } | |
257 | ||
258 | next_entry: | |
259 | if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg; | |
260 | CS_CHECK(GetNextTuple, pcmcia_get_next_tuple(handle, &tuple)); | |
261 | } | |
262 | ||
263 | CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq)); | |
264 | CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf)); | |
265 | ||
266 | release_region(link->io.BasePort1, link->io.NumPorts1); | |
267 | if (link->io.NumPorts2) | |
268 | release_region(link->io.BasePort2, link->io.NumPorts2); | |
269 | p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2, | |
270 | link->irq.AssignedIRQ, PARPORT_DMA_NONE, | |
271 | NULL); | |
272 | if (p == NULL) { | |
273 | printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at " | |
274 | "0x%3x, irq %u failed\n", link->io.BasePort1, | |
275 | link->irq.AssignedIRQ); | |
276 | goto failed; | |
277 | } | |
278 | ||
279 | p->modes |= PARPORT_MODE_PCSPP; | |
280 | if (epp_mode) | |
281 | p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP; | |
282 | info->ndev = 1; | |
283 | info->node.major = LP_MAJOR; | |
284 | info->node.minor = p->number; | |
285 | info->port = p; | |
286 | strcpy(info->node.dev_name, p->name); | |
287 | link->dev = &info->node; | |
288 | ||
289 | link->state &= ~DEV_CONFIG_PENDING; | |
290 | return; | |
291 | ||
292 | cs_failed: | |
293 | cs_error(link->handle, last_fn, last_ret); | |
294 | failed: | |
295 | parport_cs_release(link); | |
296 | link->state &= ~DEV_CONFIG_PENDING; | |
297 | ||
298 | } /* parport_config */ | |
299 | ||
300 | /*====================================================================== | |
301 | ||
302 | After a card is removed, parport_cs_release() will unregister the | |
303 | device, and release the PCMCIA configuration. If the device is | |
304 | still open, this will be postponed until it is closed. | |
305 | ||
306 | ======================================================================*/ | |
307 | ||
308 | void parport_cs_release(dev_link_t *link) | |
309 | { | |
310 | parport_info_t *info = link->priv; | |
311 | ||
312 | DEBUG(0, "parport_release(0x%p)\n", link); | |
313 | ||
314 | if (info->ndev) { | |
315 | struct parport *p = info->port; | |
316 | parport_pc_unregister_port(p); | |
317 | request_region(link->io.BasePort1, link->io.NumPorts1, | |
318 | info->node.dev_name); | |
319 | if (link->io.NumPorts2) | |
320 | request_region(link->io.BasePort2, link->io.NumPorts2, | |
321 | info->node.dev_name); | |
322 | } | |
323 | info->ndev = 0; | |
324 | link->dev = NULL; | |
325 | ||
326 | pcmcia_release_configuration(link->handle); | |
327 | pcmcia_release_io(link->handle, &link->io); | |
328 | pcmcia_release_irq(link->handle, &link->irq); | |
329 | ||
330 | link->state &= ~DEV_CONFIG; | |
331 | ||
332 | } /* parport_cs_release */ | |
333 | ||
334 | /*====================================================================== | |
335 | ||
336 | The card status event handler. Mostly, this schedules other | |
337 | stuff to run after an event is received. | |
338 | ||
339 | ======================================================================*/ | |
340 | ||
341 | int parport_event(event_t event, int priority, | |
342 | event_callback_args_t *args) | |
343 | { | |
344 | dev_link_t *link = args->client_data; | |
345 | ||
346 | DEBUG(1, "parport_event(0x%06x)\n", event); | |
347 | ||
348 | switch (event) { | |
349 | case CS_EVENT_CARD_REMOVAL: | |
350 | link->state &= ~DEV_PRESENT; | |
351 | if (link->state & DEV_CONFIG) | |
352 | parport_cs_release(link); | |
353 | break; | |
354 | case CS_EVENT_CARD_INSERTION: | |
355 | link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; | |
356 | parport_config(link); | |
357 | break; | |
358 | case CS_EVENT_PM_SUSPEND: | |
359 | link->state |= DEV_SUSPEND; | |
360 | /* Fall through... */ | |
361 | case CS_EVENT_RESET_PHYSICAL: | |
362 | if (link->state & DEV_CONFIG) | |
363 | pcmcia_release_configuration(link->handle); | |
364 | break; | |
365 | case CS_EVENT_PM_RESUME: | |
366 | link->state &= ~DEV_SUSPEND; | |
367 | /* Fall through... */ | |
368 | case CS_EVENT_CARD_RESET: | |
369 | if (DEV_OK(link)) | |
370 | pcmcia_request_configuration(link->handle, &link->conf); | |
371 | break; | |
372 | } | |
373 | return 0; | |
374 | } /* parport_event */ | |
375 | ||
376 | static struct pcmcia_driver parport_cs_driver = { | |
377 | .owner = THIS_MODULE, | |
378 | .drv = { | |
379 | .name = "parport_cs", | |
380 | }, | |
381 | .attach = parport_attach, | |
382 | .detach = parport_detach, | |
383 | }; | |
384 | ||
385 | static int __init init_parport_cs(void) | |
386 | { | |
387 | return pcmcia_register_driver(&parport_cs_driver); | |
388 | } | |
389 | ||
390 | static void __exit exit_parport_cs(void) | |
391 | { | |
392 | pcmcia_unregister_driver(&parport_cs_driver); | |
393 | BUG_ON(dev_list != NULL); | |
394 | } | |
395 | ||
396 | module_init(init_parport_cs); | |
397 | module_exit(exit_parport_cs); |