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ath9k: split out access to rx status information
[linux-2.6/libata-dev.git] / drivers / pcmcia / pcmcia_resource.c
blobb2df04199a2197b353ab074cd3a682f65cb7dfa7
1 /*
2 * PCMCIA 16-bit resource management functions
3 *
4 * The initial developer of the original code is David A. Hinds
5 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
6 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
7 *
8 * Copyright (C) 1999 David A. Hinds
9 * Copyright (C) 2004-2005 Dominik Brodowski
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 */
16
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/interrupt.h>
20 #include <linux/delay.h>
21 #include <linux/pci.h>
22 #include <linux/device.h>
23 #include <linux/netdevice.h>
24
25 #include <pcmcia/cs_types.h>
26 #include <pcmcia/ss.h>
27 #include <pcmcia/cs.h>
28 #include <pcmcia/cistpl.h>
29 #include <pcmcia/cisreg.h>
30 #include <pcmcia/ds.h>
31
32 #include "cs_internal.h"
33
34
35 /* Access speed for IO windows */
36 static int io_speed;
37 module_param(io_speed, int, 0444);
38
39
40 #ifdef CONFIG_PCMCIA_PROBE
41 #include <asm/irq.h>
42 /* mask of IRQs already reserved by other cards, we should avoid using them */
43 static u8 pcmcia_used_irq[NR_IRQS];
44 #endif
45
46 static int pcmcia_adjust_io_region(struct resource *res, unsigned long start,
47 unsigned long end, struct pcmcia_socket *s)
48 {
49 if (s->resource_ops->adjust_io_region)
50 return s->resource_ops->adjust_io_region(res, start, end, s);
51 return -ENOMEM;
52 }
53
54 static struct resource *pcmcia_find_io_region(unsigned long base, int num,
55 unsigned long align,
56 struct pcmcia_socket *s)
57 {
58 if (s->resource_ops->find_io)
59 return s->resource_ops->find_io(base, num, align, s);
60 return NULL;
61 }
62
63 int pcmcia_validate_mem(struct pcmcia_socket *s)
64 {
65 if (s->resource_ops->validate_mem)
66 return s->resource_ops->validate_mem(s);
67 /* if there is no callback, we can assume that everything is OK */
68 return 0;
69 }
70
71 struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
72 int low, struct pcmcia_socket *s)
73 {
74 if (s->resource_ops->find_mem)
75 return s->resource_ops->find_mem(base, num, align, low, s);
76 return NULL;
77 }
78
79
80 /** alloc_io_space
81 *
82 * Special stuff for managing IO windows, because they are scarce
83 */
84
85 static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
86 unsigned int *base, unsigned int num, u_int lines)
87 {
88 int i;
89 unsigned int try, align;
90
91 align = (*base) ? (lines ? 1<<lines : 0) : 1;
92 if (align && (align < num)) {
93 if (*base) {
94 dev_dbg(&s->dev, "odd IO request: num %#x align %#x\n",
95 num, align);
96 align = 0;
97 } else
98 while (align && (align < num))
99 align <<= 1;
100 }
101 if (*base & ~(align-1)) {
102 dev_dbg(&s->dev, "odd IO request: base %#x align %#x\n",
103 *base, align);
104 align = 0;
105 }
106 if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
107 *base = s->io_offset | (*base & 0x0fff);
108 return 0;
109 }
110 /* Check for an already-allocated window that must conflict with
111 * what was asked for. It is a hack because it does not catch all
112 * potential conflicts, just the most obvious ones.
113 */
114 for (i = 0; i < MAX_IO_WIN; i++)
115 if ((s->io[i].res) && *base &&
116 ((s->io[i].res->start & (align-1)) == *base))
117 return 1;
118 for (i = 0; i < MAX_IO_WIN; i++) {
119 if (!s->io[i].res) {
120 s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
121 if (s->io[i].res) {
122 *base = s->io[i].res->start;
123 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
124 s->io[i].InUse = num;
125 break;
126 } else
127 return 1;
128 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
129 continue;
130 /* Try to extend top of window */
131 try = s->io[i].res->end + 1;
132 if ((*base == 0) || (*base == try))
133 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
134 s->io[i].res->end + num, s) == 0) {
135 *base = try;
136 s->io[i].InUse += num;
137 break;
138 }
139 /* Try to extend bottom of window */
140 try = s->io[i].res->start - num;
141 if ((*base == 0) || (*base == try))
142 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
143 s->io[i].res->end, s) == 0) {
144 *base = try;
145 s->io[i].InUse += num;
146 break;
147 }
148 }
149 return (i == MAX_IO_WIN);
150 } /* alloc_io_space */
151
152
153 static void release_io_space(struct pcmcia_socket *s, unsigned int base,
154 unsigned int num)
155 {
156 int i;
157
158 for (i = 0; i < MAX_IO_WIN; i++) {
159 if (!s->io[i].res)
160 continue;
161 if ((s->io[i].res->start <= base) &&
162 (s->io[i].res->end >= base+num-1)) {
163 s->io[i].InUse -= num;
164 /* Free the window if no one else is using it */
165 if (s->io[i].InUse == 0) {
166 release_resource(s->io[i].res);
167 kfree(s->io[i].res);
168 s->io[i].res = NULL;
169 }
170 }
171 }
172 } /* release_io_space */
173
174
175 /** pccard_access_configuration_register
176 *
177 * Access_configuration_register() reads and writes configuration
178 * registers in attribute memory. Memory window 0 is reserved for
179 * this and the tuple reading services.
180 */
181
182 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
183 conf_reg_t *reg)
184 {
185 struct pcmcia_socket *s;
186 config_t *c;
187 int addr;
188 u_char val;
189
190 if (!p_dev || !p_dev->function_config)
191 return -EINVAL;
192
193 s = p_dev->socket;
194
195 mutex_lock(&s->ops_mutex);
196 c = p_dev->function_config;
197
198 if (!(c->state & CONFIG_LOCKED)) {
199 dev_dbg(&s->dev, "Configuration isnt't locked\n");
200 mutex_unlock(&s->ops_mutex);
201 return -EACCES;
202 }
203
204 addr = (c->ConfigBase + reg->Offset) >> 1;
205 mutex_unlock(&s->ops_mutex);
206
207 switch (reg->Action) {
208 case CS_READ:
209 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
210 reg->Value = val;
211 break;
212 case CS_WRITE:
213 val = reg->Value;
214 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
215 break;
216 default:
217 dev_dbg(&s->dev, "Invalid conf register request\n");
218 return -EINVAL;
219 break;
220 }
221 return 0;
222 } /* pcmcia_access_configuration_register */
223 EXPORT_SYMBOL(pcmcia_access_configuration_register);
224
225
226 int pcmcia_map_mem_page(struct pcmcia_device *p_dev, window_handle_t wh,
227 memreq_t *req)
228 {
229 struct pcmcia_socket *s = p_dev->socket;
230 int ret;
231
232 wh--;
233 if (wh >= MAX_WIN)
234 return -EINVAL;
235 if (req->Page != 0) {
236 dev_dbg(&s->dev, "failure: requested page is zero\n");
237 return -EINVAL;
238 }
239 mutex_lock(&s->ops_mutex);
240 s->win[wh].card_start = req->CardOffset;
241 ret = s->ops->set_mem_map(s, &s->win[wh]);
242 if (ret)
243 dev_warn(&s->dev, "failed to set_mem_map\n");
244 mutex_unlock(&s->ops_mutex);
245 return ret;
246 } /* pcmcia_map_mem_page */
247 EXPORT_SYMBOL(pcmcia_map_mem_page);
248
249
250 /** pcmcia_modify_configuration
251 *
252 * Modify a locked socket configuration
253 */
254 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
255 modconf_t *mod)
256 {
257 struct pcmcia_socket *s;
258 config_t *c;
259
260 s = p_dev->socket;
261
262 mutex_lock(&s->ops_mutex);
263 c = p_dev->function_config;
264
265 if (!(s->state & SOCKET_PRESENT)) {
266 dev_dbg(&s->dev, "No card present\n");
267 mutex_unlock(&s->ops_mutex);
268 return -ENODEV;
269 }
270 if (!(c->state & CONFIG_LOCKED)) {
271 dev_dbg(&s->dev, "Configuration isnt't locked\n");
272 mutex_unlock(&s->ops_mutex);
273 return -EACCES;
274 }
275
276 if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
277 if (mod->Attributes & CONF_ENABLE_IRQ) {
278 c->Attributes |= CONF_ENABLE_IRQ;
279 s->socket.io_irq = s->irq.AssignedIRQ;
280 } else {
281 c->Attributes &= ~CONF_ENABLE_IRQ;
282 s->socket.io_irq = 0;
283 }
284 s->ops->set_socket(s, &s->socket);
285 }
286
287 if (mod->Attributes & CONF_VCC_CHANGE_VALID) {
288 dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
289 return -EINVAL;
290 }
291
292 /* We only allow changing Vpp1 and Vpp2 to the same value */
293 if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
294 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
295 if (mod->Vpp1 != mod->Vpp2) {
296 dev_dbg(&s->dev, "Vpp1 and Vpp2 must be the same\n");
297 mutex_unlock(&s->ops_mutex);
298 return -EINVAL;
299 }
300 s->socket.Vpp = mod->Vpp1;
301 if (s->ops->set_socket(s, &s->socket)) {
302 mutex_unlock(&s->ops_mutex);
303 dev_printk(KERN_WARNING, &s->dev,
304 "Unable to set VPP\n");
305 return -EIO;
306 }
307 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
308 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
309 dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
310 mutex_unlock(&s->ops_mutex);
311 return -EINVAL;
312 }
313
314 if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
315 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
316 pccard_io_map io_on;
317 int i;
318
319 io_on.speed = io_speed;
320 for (i = 0; i < MAX_IO_WIN; i++) {
321 if (!s->io[i].res)
322 continue;
323 io_off.map = i;
324 io_on.map = i;
325
326 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
327 io_on.start = s->io[i].res->start;
328 io_on.stop = s->io[i].res->end;
329
330 s->ops->set_io_map(s, &io_off);
331 mdelay(40);
332 s->ops->set_io_map(s, &io_on);
333 }
334 }
335 mutex_unlock(&s->ops_mutex);
336
337 return 0;
338 } /* modify_configuration */
339 EXPORT_SYMBOL(pcmcia_modify_configuration);
340
341
342 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
343 {
344 pccard_io_map io = { 0, 0, 0, 0, 1 };
345 struct pcmcia_socket *s = p_dev->socket;
346 config_t *c;
347 int i;
348
349 mutex_lock(&s->ops_mutex);
350 c = p_dev->function_config;
351 if (p_dev->_locked) {
352 p_dev->_locked = 0;
353 if (--(s->lock_count) == 0) {
354 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
355 s->socket.Vpp = 0;
356 s->socket.io_irq = 0;
357 s->ops->set_socket(s, &s->socket);
358 }
359 }
360 if (c->state & CONFIG_LOCKED) {
361 c->state &= ~CONFIG_LOCKED;
362 if (c->state & CONFIG_IO_REQ)
363 for (i = 0; i < MAX_IO_WIN; i++) {
364 if (!s->io[i].res)
365 continue;
366 s->io[i].Config--;
367 if (s->io[i].Config != 0)
368 continue;
369 io.map = i;
370 s->ops->set_io_map(s, &io);
371 }
372 }
373 mutex_unlock(&s->ops_mutex);
374
375 return 0;
376 } /* pcmcia_release_configuration */
377
378
379 /** pcmcia_release_io
380 *
381 * Release_io() releases the I/O ranges allocated by a client. This
382 * may be invoked some time after a card ejection has already dumped
383 * the actual socket configuration, so if the client is "stale", we
384 * don't bother checking the port ranges against the current socket
385 * values.
386 */
387 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
388 {
389 struct pcmcia_socket *s = p_dev->socket;
390 int ret = -EINVAL;
391 config_t *c;
392
393 mutex_lock(&s->ops_mutex);
394 c = p_dev->function_config;
395
396 if (!p_dev->_io)
397 goto out;
398
399 p_dev->_io = 0;
400
401 if ((c->io.BasePort1 != req->BasePort1) ||
402 (c->io.NumPorts1 != req->NumPorts1) ||
403 (c->io.BasePort2 != req->BasePort2) ||
404 (c->io.NumPorts2 != req->NumPorts2))
405 goto out;
406
407 c->state &= ~CONFIG_IO_REQ;
408
409 release_io_space(s, req->BasePort1, req->NumPorts1);
410 if (req->NumPorts2)
411 release_io_space(s, req->BasePort2, req->NumPorts2);
412
413 out:
414 mutex_unlock(&s->ops_mutex);
415
416 return ret;
417 } /* pcmcia_release_io */
418
419
420 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
421 {
422 struct pcmcia_socket *s = p_dev->socket;
423 config_t *c;
424 int ret = -EINVAL;
425
426 mutex_lock(&s->ops_mutex);
427
428 c = p_dev->function_config;
429
430 if (!p_dev->_irq)
431 goto out;
432
433 p_dev->_irq = 0;
434
435 if (c->state & CONFIG_LOCKED)
436 goto out;
437
438 if (c->irq.Attributes != req->Attributes) {
439 dev_dbg(&s->dev, "IRQ attributes must match assigned ones\n");
440 goto out;
441 }
442 if (s->irq.AssignedIRQ != req->AssignedIRQ) {
443 dev_dbg(&s->dev, "IRQ must match assigned one\n");
444 goto out;
445 }
446 if (--s->irq.Config == 0) {
447 c->state &= ~CONFIG_IRQ_REQ;
448 s->irq.AssignedIRQ = 0;
449 }
450
451 if (req->Handler)
452 free_irq(req->AssignedIRQ, p_dev->priv);
453
454 #ifdef CONFIG_PCMCIA_PROBE
455 pcmcia_used_irq[req->AssignedIRQ]--;
456 #endif
457 ret = 0;
458
459 out:
460 mutex_unlock(&s->ops_mutex);
461
462 return ret;
463 } /* pcmcia_release_irq */
464
465
466 int pcmcia_release_window(struct pcmcia_device *p_dev, window_handle_t wh)
467 {
468 struct pcmcia_socket *s = p_dev->socket;
469 pccard_mem_map *win;
470
471 wh--;
472 if (wh >= MAX_WIN)
473 return -EINVAL;
474
475 mutex_lock(&s->ops_mutex);
476 win = &s->win[wh];
477
478 if (!(p_dev->_win & CLIENT_WIN_REQ(wh))) {
479 dev_dbg(&s->dev, "not releasing unknown window\n");
480 mutex_unlock(&s->ops_mutex);
481 return -EINVAL;
482 }
483
484 /* Shut down memory window */
485 win->flags &= ~MAP_ACTIVE;
486 s->ops->set_mem_map(s, win);
487 s->state &= ~SOCKET_WIN_REQ(wh);
488
489 /* Release system memory */
490 if (win->res) {
491 release_resource(win->res);
492 kfree(win->res);
493 win->res = NULL;
494 }
495 p_dev->_win &= ~CLIENT_WIN_REQ(wh);
496 mutex_unlock(&s->ops_mutex);
497
498 return 0;
499 } /* pcmcia_release_window */
500 EXPORT_SYMBOL(pcmcia_release_window);
501
502
503 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
504 config_req_t *req)
505 {
506 int i;
507 u_int base;
508 struct pcmcia_socket *s = p_dev->socket;
509 config_t *c;
510 pccard_io_map iomap;
511
512 if (!(s->state & SOCKET_PRESENT))
513 return -ENODEV;
514
515 if (req->IntType & INT_CARDBUS) {
516 dev_dbg(&s->dev, "IntType may not be INT_CARDBUS\n");
517 return -EINVAL;
518 }
519
520 mutex_lock(&s->ops_mutex);
521 c = p_dev->function_config;
522 if (c->state & CONFIG_LOCKED) {
523 mutex_unlock(&s->ops_mutex);
524 dev_dbg(&s->dev, "Configuration is locked\n");
525 return -EACCES;
526 }
527
528 /* Do power control. We don't allow changes in Vcc. */
529 s->socket.Vpp = req->Vpp;
530 if (s->ops->set_socket(s, &s->socket)) {
531 mutex_unlock(&s->ops_mutex);
532 dev_printk(KERN_WARNING, &s->dev,
533 "Unable to set socket state\n");
534 return -EINVAL;
535 }
536
537 /* Pick memory or I/O card, DMA mode, interrupt */
538 c->IntType = req->IntType;
539 c->Attributes = req->Attributes;
540 if (req->IntType & INT_MEMORY_AND_IO)
541 s->socket.flags |= SS_IOCARD;
542 if (req->IntType & INT_ZOOMED_VIDEO)
543 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
544 if (req->Attributes & CONF_ENABLE_DMA)
545 s->socket.flags |= SS_DMA_MODE;
546 if (req->Attributes & CONF_ENABLE_SPKR)
547 s->socket.flags |= SS_SPKR_ENA;
548 if (req->Attributes & CONF_ENABLE_IRQ)
549 s->socket.io_irq = s->irq.AssignedIRQ;
550 else
551 s->socket.io_irq = 0;
552 s->ops->set_socket(s, &s->socket);
553 s->lock_count++;
554 mutex_unlock(&s->ops_mutex);
555
556 /* Set up CIS configuration registers */
557 base = c->ConfigBase = req->ConfigBase;
558 c->CardValues = req->Present;
559 if (req->Present & PRESENT_COPY) {
560 c->Copy = req->Copy;
561 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
562 }
563 if (req->Present & PRESENT_OPTION) {
564 if (s->functions == 1) {
565 c->Option = req->ConfigIndex & COR_CONFIG_MASK;
566 } else {
567 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
568 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
569 if (req->Present & PRESENT_IOBASE_0)
570 c->Option |= COR_ADDR_DECODE;
571 }
572 if (c->state & CONFIG_IRQ_REQ)
573 if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
574 c->Option |= COR_LEVEL_REQ;
575 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
576 mdelay(40);
577 }
578 if (req->Present & PRESENT_STATUS) {
579 c->Status = req->Status;
580 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
581 }
582 if (req->Present & PRESENT_PIN_REPLACE) {
583 c->Pin = req->Pin;
584 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
585 }
586 if (req->Present & PRESENT_EXT_STATUS) {
587 c->ExtStatus = req->ExtStatus;
588 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
589 }
590 if (req->Present & PRESENT_IOBASE_0) {
591 u_char b = c->io.BasePort1 & 0xff;
592 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
593 b = (c->io.BasePort1 >> 8) & 0xff;
594 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
595 }
596 if (req->Present & PRESENT_IOSIZE) {
597 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
598 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
599 }
600
601 /* Configure I/O windows */
602 if (c->state & CONFIG_IO_REQ) {
603 mutex_lock(&s->ops_mutex);
604 iomap.speed = io_speed;
605 for (i = 0; i < MAX_IO_WIN; i++)
606 if (s->io[i].res) {
607 iomap.map = i;
608 iomap.flags = MAP_ACTIVE;
609 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
610 case IO_DATA_PATH_WIDTH_16:
611 iomap.flags |= MAP_16BIT; break;
612 case IO_DATA_PATH_WIDTH_AUTO:
613 iomap.flags |= MAP_AUTOSZ; break;
614 default:
615 break;
616 }
617 iomap.start = s->io[i].res->start;
618 iomap.stop = s->io[i].res->end;
619 s->ops->set_io_map(s, &iomap);
620 s->io[i].Config++;
621 }
622 mutex_unlock(&s->ops_mutex);
623 }
624
625 c->state |= CONFIG_LOCKED;
626 p_dev->_locked = 1;
627 return 0;
628 } /* pcmcia_request_configuration */
629 EXPORT_SYMBOL(pcmcia_request_configuration);
630
631
632 /** pcmcia_request_io
633 *
634 * Request_io() reserves ranges of port addresses for a socket.
635 * I have not implemented range sharing or alias addressing.
636 */
637 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
638 {
639 struct pcmcia_socket *s = p_dev->socket;
640 config_t *c;
641 int ret = -EINVAL;
642
643 mutex_lock(&s->ops_mutex);
644
645 if (!(s->state & SOCKET_PRESENT)) {
646 dev_dbg(&s->dev, "No card present\n");
647 goto out;
648 }
649
650 if (!req)
651 goto out;
652
653 c = p_dev->function_config;
654 if (c->state & CONFIG_LOCKED) {
655 dev_dbg(&s->dev, "Configuration is locked\n");
656 goto out;
657 }
658 if (c->state & CONFIG_IO_REQ) {
659 dev_dbg(&s->dev, "IO already configured\n");
660 goto out;
661 }
662 if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) {
663 dev_dbg(&s->dev, "bad attribute setting for IO region 1\n");
664 goto out;
665 }
666 if ((req->NumPorts2 > 0) &&
667 (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) {
668 dev_dbg(&s->dev, "bad attribute setting for IO region 2\n");
669 goto out;
670 }
671
672 dev_dbg(&s->dev, "trying to allocate resource 1\n");
673 ret = alloc_io_space(s, req->Attributes1, &req->BasePort1,
674 req->NumPorts1, req->IOAddrLines);
675 if (ret) {
676 dev_dbg(&s->dev, "allocation of resource 1 failed\n");
677 goto out;
678 }
679
680 if (req->NumPorts2) {
681 dev_dbg(&s->dev, "trying to allocate resource 2\n");
682 ret = alloc_io_space(s, req->Attributes2, &req->BasePort2,
683 req->NumPorts2, req->IOAddrLines);
684 if (ret) {
685 dev_dbg(&s->dev, "allocation of resource 2 failed\n");
686 release_io_space(s, req->BasePort1, req->NumPorts1);
687 goto out;
688 }
689 }
690
691 c->io = *req;
692 c->state |= CONFIG_IO_REQ;
693 p_dev->_io = 1;
694 dev_dbg(&s->dev, "allocating resources succeeded: %d\n", ret);
695
696 out:
697 mutex_unlock(&s->ops_mutex);
698
699 return ret;
700 } /* pcmcia_request_io */
701 EXPORT_SYMBOL(pcmcia_request_io);
702
703
704 /** pcmcia_request_irq
705 *
706 * Request_irq() reserves an irq for this client.
707 *
708 * Also, since Linux only reserves irq's when they are actually
709 * hooked, we don't guarantee that an irq will still be available
710 * when the configuration is locked. Now that I think about it,
711 * there might be a way to fix this using a dummy handler.
712 */
713
714 #ifdef CONFIG_PCMCIA_PROBE
715 static irqreturn_t test_action(int cpl, void *dev_id)
716 {
717 return IRQ_NONE;
718 }
719 #endif
720
721 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
722 {
723 struct pcmcia_socket *s = p_dev->socket;
724 config_t *c;
725 int ret = -EINVAL, irq = 0;
726 int type;
727
728 mutex_lock(&s->ops_mutex);
729
730 if (!(s->state & SOCKET_PRESENT)) {
731 dev_dbg(&s->dev, "No card present\n");
732 goto out;
733 }
734 c = p_dev->function_config;
735 if (c->state & CONFIG_LOCKED) {
736 dev_dbg(&s->dev, "Configuration is locked\n");
737 goto out;
738 }
739 if (c->state & CONFIG_IRQ_REQ) {
740 dev_dbg(&s->dev, "IRQ already configured\n");
741 goto out;
742 }
743
744 /* Decide what type of interrupt we are registering */
745 type = 0;
746 if (s->functions > 1) /* All of this ought to be handled higher up */
747 type = IRQF_SHARED;
748 else if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
749 type = IRQF_SHARED;
750 else
751 printk(KERN_WARNING "pcmcia: Driver needs updating to support IRQ sharing.\n");
752
753 #ifdef CONFIG_PCMCIA_PROBE
754
755 #ifdef IRQ_NOAUTOEN
756 /* if the underlying IRQ infrastructure allows for it, only allocate
757 * the IRQ, but do not enable it
758 */
759 if (!(req->Handler))
760 type |= IRQ_NOAUTOEN;
761 #endif /* IRQ_NOAUTOEN */
762
763 if (s->irq.AssignedIRQ != 0) {
764 /* If the interrupt is already assigned, it must be the same */
765 irq = s->irq.AssignedIRQ;
766 } else {
767 int try;
768 u32 mask = s->irq_mask;
769 void *data = p_dev; /* something unique to this device */
770
771 for (try = 0; try < 64; try++) {
772 irq = try % 32;
773
774 /* marked as available by driver, and not blocked by userspace? */
775 if (!((mask >> irq) & 1))
776 continue;
777
778 /* avoid an IRQ which is already used by a PCMCIA card */
779 if ((try < 32) && pcmcia_used_irq[irq])
780 continue;
781
782 /* register the correct driver, if possible, of check whether
783 * registering a dummy handle works, i.e. if the IRQ isn't
784 * marked as used by the kernel resource management core */
785 ret = request_irq(irq,
786 (req->Handler) ? req->Handler : test_action,
787 type,
788 p_dev->devname,
789 (req->Handler) ? p_dev->priv : data);
790 if (!ret) {
791 if (!req->Handler)
792 free_irq(irq, data);
793 break;
794 }
795 }
796 }
797 #endif
798 /* only assign PCI irq if no IRQ already assigned */
799 if (ret && !s->irq.AssignedIRQ) {
800 if (!s->pci_irq) {
801 dev_printk(KERN_INFO, &s->dev, "no IRQ found\n");
802 goto out;
803 }
804 type = IRQF_SHARED;
805 irq = s->pci_irq;
806 }
807
808 if (ret && req->Handler) {
809 ret = request_irq(irq, req->Handler, type,
810 p_dev->devname, p_dev->priv);
811 if (ret) {
812 dev_printk(KERN_INFO, &s->dev,
813 "request_irq() failed\n");
814 goto out;
815 }
816 }
817
818 /* Make sure the fact the request type was overridden is passed back */
819 if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
820 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
821 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
822 "request for exclusive IRQ could not be fulfilled.\n");
823 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
824 "needs updating to supported shared IRQ lines.\n");
825 }
826 c->irq.Attributes = req->Attributes;
827 s->irq.AssignedIRQ = req->AssignedIRQ = irq;
828 s->irq.Config++;
829
830 c->state |= CONFIG_IRQ_REQ;
831 p_dev->_irq = 1;
832
833 #ifdef CONFIG_PCMCIA_PROBE
834 pcmcia_used_irq[irq]++;
835 #endif
836
837 ret = 0;
838 out:
839 mutex_unlock(&s->ops_mutex);
840 return ret;
841 } /* pcmcia_request_irq */
842 EXPORT_SYMBOL(pcmcia_request_irq);
843
844
845 /** pcmcia_request_window
846 *
847 * Request_window() establishes a mapping between card memory space
848 * and system memory space.
849 */
850 int pcmcia_request_window(struct pcmcia_device *p_dev, win_req_t *req, window_handle_t *wh)
851 {
852 struct pcmcia_socket *s = p_dev->socket;
853 pccard_mem_map *win;
854 u_long align;
855 int w;
856
857 if (!(s->state & SOCKET_PRESENT)) {
858 dev_dbg(&s->dev, "No card present\n");
859 return -ENODEV;
860 }
861 if (req->Attributes & (WIN_PAGED | WIN_SHARED)) {
862 dev_dbg(&s->dev, "bad attribute setting for iomem region\n");
863 return -EINVAL;
864 }
865
866 /* Window size defaults to smallest available */
867 if (req->Size == 0)
868 req->Size = s->map_size;
869 align = (((s->features & SS_CAP_MEM_ALIGN) ||
870 (req->Attributes & WIN_STRICT_ALIGN)) ?
871 req->Size : s->map_size);
872 if (req->Size & (s->map_size-1)) {
873 dev_dbg(&s->dev, "invalid map size\n");
874 return -EINVAL;
875 }
876 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
877 (req->Base & (align-1))) {
878 dev_dbg(&s->dev, "invalid base address\n");
879 return -EINVAL;
880 }
881 if (req->Base)
882 align = 0;
883
884 /* Allocate system memory window */
885 for (w = 0; w < MAX_WIN; w++)
886 if (!(s->state & SOCKET_WIN_REQ(w)))
887 break;
888 if (w == MAX_WIN) {
889 dev_dbg(&s->dev, "all windows are used already\n");
890 return -EINVAL;
891 }
892
893 mutex_lock(&s->ops_mutex);
894 win = &s->win[w];
895
896 if (!(s->features & SS_CAP_STATIC_MAP)) {
897 win->res = pcmcia_find_mem_region(req->Base, req->Size, align,
898 (req->Attributes & WIN_MAP_BELOW_1MB), s);
899 if (!win->res) {
900 dev_dbg(&s->dev, "allocating mem region failed\n");
901 mutex_unlock(&s->ops_mutex);
902 return -EINVAL;
903 }
904 }
905 p_dev->_win |= CLIENT_WIN_REQ(w);
906
907 /* Configure the socket controller */
908 win->map = w+1;
909 win->flags = 0;
910 win->speed = req->AccessSpeed;
911 if (req->Attributes & WIN_MEMORY_TYPE)
912 win->flags |= MAP_ATTRIB;
913 if (req->Attributes & WIN_ENABLE)
914 win->flags |= MAP_ACTIVE;
915 if (req->Attributes & WIN_DATA_WIDTH_16)
916 win->flags |= MAP_16BIT;
917 if (req->Attributes & WIN_USE_WAIT)
918 win->flags |= MAP_USE_WAIT;
919 win->card_start = 0;
920
921 if (s->ops->set_mem_map(s, win) != 0) {
922 dev_dbg(&s->dev, "failed to set memory mapping\n");
923 mutex_unlock(&s->ops_mutex);
924 return -EIO;
925 }
926 s->state |= SOCKET_WIN_REQ(w);
927
928 /* Return window handle */
929 if (s->features & SS_CAP_STATIC_MAP)
930 req->Base = win->static_start;
931 else
932 req->Base = win->res->start;
933
934 mutex_unlock(&s->ops_mutex);
935 *wh = w + 1;
936
937 return 0;
938 } /* pcmcia_request_window */
939 EXPORT_SYMBOL(pcmcia_request_window);
940
941 void pcmcia_disable_device(struct pcmcia_device *p_dev)
942 {
943 pcmcia_release_configuration(p_dev);
944 pcmcia_release_io(p_dev, &p_dev->io);
945 pcmcia_release_irq(p_dev, &p_dev->irq);
946 if (p_dev->win)
947 pcmcia_release_window(p_dev, p_dev->win);
948 }
949 EXPORT_SYMBOL(pcmcia_disable_device);
950
951
952 struct pcmcia_cfg_mem {
953 struct pcmcia_device *p_dev;
954 void *priv_data;
955 int (*conf_check) (struct pcmcia_device *p_dev,
956 cistpl_cftable_entry_t *cfg,
957 cistpl_cftable_entry_t *dflt,
958 unsigned int vcc,
959 void *priv_data);
960 cisparse_t parse;
961 cistpl_cftable_entry_t dflt;
962 };
963
964 /**
965 * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
966 *
967 * pcmcia_do_loop_config() is the internal callback for the call from
968 * pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
969 * by a struct pcmcia_cfg_mem.
970 */
971 static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
972 {
973 cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
974 struct pcmcia_cfg_mem *cfg_mem = priv;
975
976 /* default values */
977 cfg_mem->p_dev->conf.ConfigIndex = cfg->index;
978 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
979 cfg_mem->dflt = *cfg;
980
981 return cfg_mem->conf_check(cfg_mem->p_dev, cfg, &cfg_mem->dflt,
982 cfg_mem->p_dev->socket->socket.Vcc,
983 cfg_mem->priv_data);
984 }
985
986 /**
987 * pcmcia_loop_config() - loop over configuration options
988 * @p_dev: the struct pcmcia_device which we need to loop for.
989 * @conf_check: function to call for each configuration option.
990 * It gets passed the struct pcmcia_device, the CIS data
991 * describing the configuration option, and private data
992 * being passed to pcmcia_loop_config()
993 * @priv_data: private data to be passed to the conf_check function.
994 *
995 * pcmcia_loop_config() loops over all configuration options, and calls
996 * the driver-specific conf_check() for each one, checking whether
997 * it is a valid one. Returns 0 on success or errorcode otherwise.
998 */
999 int pcmcia_loop_config(struct pcmcia_device *p_dev,
1000 int (*conf_check) (struct pcmcia_device *p_dev,
1001 cistpl_cftable_entry_t *cfg,
1002 cistpl_cftable_entry_t *dflt,
1003 unsigned int vcc,
1004 void *priv_data),
1005 void *priv_data)
1006 {
1007 struct pcmcia_cfg_mem *cfg_mem;
1008 int ret;
1009
1010 cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
1011 if (cfg_mem == NULL)
1012 return -ENOMEM;
1013
1014 cfg_mem->p_dev = p_dev;
1015 cfg_mem->conf_check = conf_check;
1016 cfg_mem->priv_data = priv_data;
1017
1018 ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
1019 CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
1020 cfg_mem, pcmcia_do_loop_config);
1021
1022 kfree(cfg_mem);
1023 return ret;
1024 }
1025 EXPORT_SYMBOL(pcmcia_loop_config);
1026
1027
1028 struct pcmcia_loop_mem {
1029 struct pcmcia_device *p_dev;
1030 void *priv_data;
1031 int (*loop_tuple) (struct pcmcia_device *p_dev,
1032 tuple_t *tuple,
1033 void *priv_data);
1034 };
1035
1036 /**
1037 * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
1038 *
1039 * pcmcia_do_loop_tuple() is the internal callback for the call from
1040 * pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred
1041 * by a struct pcmcia_cfg_mem.
1042 */
1043 static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
1044 {
1045 struct pcmcia_loop_mem *loop = priv;
1046
1047 return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
1048 };
1049
1050 /**
1051 * pcmcia_loop_tuple() - loop over tuples in the CIS
1052 * @p_dev: the struct pcmcia_device which we need to loop for.
1053 * @code: which CIS code shall we look for?
1054 * @priv_data: private data to be passed to the loop_tuple function.
1055 * @loop_tuple: function to call for each CIS entry of type @function. IT
1056 * gets passed the raw tuple and @priv_data.
1057 *
1058 * pcmcia_loop_tuple() loops over all CIS entries of type @function, and
1059 * calls the @loop_tuple function for each entry. If the call to @loop_tuple
1060 * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
1061 */
1062 int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
1063 int (*loop_tuple) (struct pcmcia_device *p_dev,
1064 tuple_t *tuple,
1065 void *priv_data),
1066 void *priv_data)
1067 {
1068 struct pcmcia_loop_mem loop = {
1069 .p_dev = p_dev,
1070 .loop_tuple = loop_tuple,
1071 .priv_data = priv_data};
1072
1073 return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
1074 &loop, pcmcia_do_loop_tuple);
1075 }
1076 EXPORT_SYMBOL(pcmcia_loop_tuple);
1077
1078
1079 struct pcmcia_loop_get {
1080 size_t len;
1081 cisdata_t **buf;
1082 };
1083
1084 /**
1085 * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
1086 *
1087 * pcmcia_do_get_tuple() is the internal callback for the call from
1088 * pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in
1089 * the first tuple, return 0 unconditionally. Create a memory buffer large
1090 * enough to hold the content of the tuple, and fill it with the tuple data.
1091 * The caller is responsible to free the buffer.
1092 */
1093 static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple,
1094 void *priv)
1095 {
1096 struct pcmcia_loop_get *get = priv;
1097
1098 *get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL);
1099 if (*get->buf) {
1100 get->len = tuple->TupleDataLen;
1101 memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen);
1102 } else
1103 dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n");
1104 return 0;
1105 }
1106
1107 /**
1108 * pcmcia_get_tuple() - get first tuple from CIS
1109 * @p_dev: the struct pcmcia_device which we need to loop for.
1110 * @code: which CIS code shall we look for?
1111 * @buf: pointer to store the buffer to.
1112 *
1113 * pcmcia_get_tuple() gets the content of the first CIS entry of type @code.
1114 * It returns the buffer length (or zero). The caller is responsible to free
1115 * the buffer passed in @buf.
1116 */
1117 size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
1118 unsigned char **buf)
1119 {
1120 struct pcmcia_loop_get get = {
1121 .len = 0,
1122 .buf = buf,
1123 };
1124
1125 *get.buf = NULL;
1126 pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get);
1127
1128 return get.len;
1129 }
1130 EXPORT_SYMBOL(pcmcia_get_tuple);
1131
1132
1133 /**
1134 * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis()
1135 *
1136 * pcmcia_do_get_mac() is the internal callback for the call from
1137 * pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the
1138 * tuple contains a proper LAN_NODE_ID of length 6, and copy the data
1139 * to struct net_device->dev_addr[i].
1140 */
1141 static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple,
1142 void *priv)
1143 {
1144 struct net_device *dev = priv;
1145 int i;
1146
1147 if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
1148 return -EINVAL;
1149 if (tuple->TupleDataLen < ETH_ALEN + 2) {
1150 dev_warn(&p_dev->dev, "Invalid CIS tuple length for "
1151 "LAN_NODE_ID\n");
1152 return -EINVAL;
1153 }
1154
1155 if (tuple->TupleData[1] != ETH_ALEN) {
1156 dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n");
1157 return -EINVAL;
1158 }
1159 for (i = 0; i < 6; i++)
1160 dev->dev_addr[i] = tuple->TupleData[i+2];
1161 return 0;
1162 }
1163
1164 /**
1165 * pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE
1166 * @p_dev: the struct pcmcia_device for which we want the address.
1167 * @dev: a properly prepared struct net_device to store the info to.
1168 *
1169 * pcmcia_get_mac_from_cis() reads out the hardware MAC address from
1170 * CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which
1171 * must be set up properly by the driver (see examples!).
1172 */
1173 int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev)
1174 {
1175 return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev);
1176 }
1177 EXPORT_SYMBOL(pcmcia_get_mac_from_cis);
1178
Linux 2.6 libata-dev (mirror)