PNP: remove pnp_resource_table from internal get/set interfaces
[linux-2.6.git] / drivers / pnp / resource.c
1 /*
2  * resource.c - Contains functions for registering and analyzing resource information
3  *
4  * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
5  * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
6  */
7
8 #include <linux/module.h>
9 #include <linux/errno.h>
10 #include <linux/interrupt.h>
11 #include <linux/kernel.h>
12 #include <asm/io.h>
13 #include <asm/dma.h>
14 #include <asm/irq.h>
15 #include <linux/pci.h>
16 #include <linux/ioport.h>
17 #include <linux/init.h>
18
19 #include <linux/pnp.h>
20 #include "base.h"
21
22 static int pnp_reserve_irq[16] = {[0 ... 15] = -1 };    /* reserve (don't use) some IRQ */
23 static int pnp_reserve_dma[8] = {[0 ... 7] = -1 };      /* reserve (don't use) some DMA */
24 static int pnp_reserve_io[16] = {[0 ... 15] = -1 };     /* reserve (don't use) some I/O region */
25 static int pnp_reserve_mem[16] = {[0 ... 15] = -1 };    /* reserve (don't use) some memory region */
26
27 /*
28  * option registration
29  */
30
31 static struct pnp_option *pnp_build_option(int priority)
32 {
33         struct pnp_option *option = pnp_alloc(sizeof(struct pnp_option));
34
35         if (!option)
36                 return NULL;
37
38         option->priority = priority & 0xff;
39         /* make sure the priority is valid */
40         if (option->priority > PNP_RES_PRIORITY_FUNCTIONAL)
41                 option->priority = PNP_RES_PRIORITY_INVALID;
42
43         return option;
44 }
45
46 struct pnp_option *pnp_register_independent_option(struct pnp_dev *dev)
47 {
48         struct pnp_option *option;
49
50         option = pnp_build_option(PNP_RES_PRIORITY_PREFERRED);
51
52         /* this should never happen but if it does we'll try to continue */
53         if (dev->independent)
54                 dev_err(&dev->dev, "independent resource already registered\n");
55         dev->independent = option;
56
57         dev_dbg(&dev->dev, "new independent option\n");
58         return option;
59 }
60
61 struct pnp_option *pnp_register_dependent_option(struct pnp_dev *dev,
62                                                  int priority)
63 {
64         struct pnp_option *option;
65
66         option = pnp_build_option(priority);
67
68         if (dev->dependent) {
69                 struct pnp_option *parent = dev->dependent;
70                 while (parent->next)
71                         parent = parent->next;
72                 parent->next = option;
73         } else
74                 dev->dependent = option;
75
76         dev_dbg(&dev->dev, "new dependent option (priority %#x)\n", priority);
77         return option;
78 }
79
80 int pnp_register_irq_resource(struct pnp_dev *dev, struct pnp_option *option,
81                               struct pnp_irq *data)
82 {
83         struct pnp_irq *ptr;
84 #ifdef DEBUG
85         char buf[PNP_IRQ_NR];   /* hex-encoded, so this is overkill but safe */
86 #endif
87
88         ptr = option->irq;
89         while (ptr && ptr->next)
90                 ptr = ptr->next;
91         if (ptr)
92                 ptr->next = data;
93         else
94                 option->irq = data;
95
96 #ifdef CONFIG_PCI
97         {
98                 int i;
99
100                 for (i = 0; i < 16; i++)
101                         if (test_bit(i, data->map))
102                                 pcibios_penalize_isa_irq(i, 0);
103         }
104 #endif
105
106 #ifdef DEBUG
107         bitmap_scnprintf(buf, sizeof(buf), data->map, PNP_IRQ_NR);
108         dev_dbg(&dev->dev, "  irq bitmask %s flags %#x\n", buf,
109                 data->flags);
110 #endif
111         return 0;
112 }
113
114 int pnp_register_dma_resource(struct pnp_dev *dev, struct pnp_option *option,
115                               struct pnp_dma *data)
116 {
117         struct pnp_dma *ptr;
118
119         ptr = option->dma;
120         while (ptr && ptr->next)
121                 ptr = ptr->next;
122         if (ptr)
123                 ptr->next = data;
124         else
125                 option->dma = data;
126
127         dev_dbg(&dev->dev, "  dma bitmask %#x flags %#x\n", data->map,
128                 data->flags);
129         return 0;
130 }
131
132 int pnp_register_port_resource(struct pnp_dev *dev, struct pnp_option *option,
133                                struct pnp_port *data)
134 {
135         struct pnp_port *ptr;
136
137         ptr = option->port;
138         while (ptr && ptr->next)
139                 ptr = ptr->next;
140         if (ptr)
141                 ptr->next = data;
142         else
143                 option->port = data;
144
145         dev_dbg(&dev->dev, "  io  "
146                 "min %#x max %#x align %d size %d flags %#x\n",
147                 data->min, data->max, data->align, data->size, data->flags);
148         return 0;
149 }
150
151 int pnp_register_mem_resource(struct pnp_dev *dev, struct pnp_option *option,
152                               struct pnp_mem *data)
153 {
154         struct pnp_mem *ptr;
155
156         ptr = option->mem;
157         while (ptr && ptr->next)
158                 ptr = ptr->next;
159         if (ptr)
160                 ptr->next = data;
161         else
162                 option->mem = data;
163
164         dev_dbg(&dev->dev, "  mem "
165                 "min %#x max %#x align %d size %d flags %#x\n",
166                 data->min, data->max, data->align, data->size, data->flags);
167         return 0;
168 }
169
170 static void pnp_free_port(struct pnp_port *port)
171 {
172         struct pnp_port *next;
173
174         while (port) {
175                 next = port->next;
176                 kfree(port);
177                 port = next;
178         }
179 }
180
181 static void pnp_free_irq(struct pnp_irq *irq)
182 {
183         struct pnp_irq *next;
184
185         while (irq) {
186                 next = irq->next;
187                 kfree(irq);
188                 irq = next;
189         }
190 }
191
192 static void pnp_free_dma(struct pnp_dma *dma)
193 {
194         struct pnp_dma *next;
195
196         while (dma) {
197                 next = dma->next;
198                 kfree(dma);
199                 dma = next;
200         }
201 }
202
203 static void pnp_free_mem(struct pnp_mem *mem)
204 {
205         struct pnp_mem *next;
206
207         while (mem) {
208                 next = mem->next;
209                 kfree(mem);
210                 mem = next;
211         }
212 }
213
214 void pnp_free_option(struct pnp_option *option)
215 {
216         struct pnp_option *next;
217
218         while (option) {
219                 next = option->next;
220                 pnp_free_port(option->port);
221                 pnp_free_irq(option->irq);
222                 pnp_free_dma(option->dma);
223                 pnp_free_mem(option->mem);
224                 kfree(option);
225                 option = next;
226         }
227 }
228
229 /*
230  * resource validity checking
231  */
232
233 #define length(start, end) (*(end) - *(start) + 1)
234
235 /* Two ranges conflict if one doesn't end before the other starts */
236 #define ranged_conflict(starta, enda, startb, endb) \
237         !((*(enda) < *(startb)) || (*(endb) < *(starta)))
238
239 #define cannot_compare(flags) \
240 ((flags) & (IORESOURCE_UNSET | IORESOURCE_DISABLED))
241
242 int pnp_check_port(struct pnp_dev *dev, int idx)
243 {
244         int tmp;
245         struct pnp_dev *tdev;
246         resource_size_t *port, *end, *tport, *tend;
247
248         port = &dev->res.port_resource[idx].start;
249         end = &dev->res.port_resource[idx].end;
250
251         /* if the resource doesn't exist, don't complain about it */
252         if (cannot_compare(dev->res.port_resource[idx].flags))
253                 return 1;
254
255         /* check if the resource is already in use, skip if the
256          * device is active because it itself may be in use */
257         if (!dev->active) {
258                 if (__check_region(&ioport_resource, *port, length(port, end)))
259                         return 0;
260         }
261
262         /* check if the resource is reserved */
263         for (tmp = 0; tmp < 8; tmp++) {
264                 int rport = pnp_reserve_io[tmp << 1];
265                 int rend = pnp_reserve_io[(tmp << 1) + 1] + rport - 1;
266                 if (ranged_conflict(port, end, &rport, &rend))
267                         return 0;
268         }
269
270         /* check for internal conflicts */
271         for (tmp = 0; tmp < PNP_MAX_PORT && tmp != idx; tmp++) {
272                 if (dev->res.port_resource[tmp].flags & IORESOURCE_IO) {
273                         tport = &dev->res.port_resource[tmp].start;
274                         tend = &dev->res.port_resource[tmp].end;
275                         if (ranged_conflict(port, end, tport, tend))
276                                 return 0;
277                 }
278         }
279
280         /* check for conflicts with other pnp devices */
281         pnp_for_each_dev(tdev) {
282                 if (tdev == dev)
283                         continue;
284                 for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) {
285                         if (tdev->res.port_resource[tmp].flags & IORESOURCE_IO) {
286                                 if (cannot_compare
287                                     (tdev->res.port_resource[tmp].flags))
288                                         continue;
289                                 tport = &tdev->res.port_resource[tmp].start;
290                                 tend = &tdev->res.port_resource[tmp].end;
291                                 if (ranged_conflict(port, end, tport, tend))
292                                         return 0;
293                         }
294                 }
295         }
296
297         return 1;
298 }
299
300 int pnp_check_mem(struct pnp_dev *dev, int idx)
301 {
302         int tmp;
303         struct pnp_dev *tdev;
304         resource_size_t *addr, *end, *taddr, *tend;
305
306         addr = &dev->res.mem_resource[idx].start;
307         end = &dev->res.mem_resource[idx].end;
308
309         /* if the resource doesn't exist, don't complain about it */
310         if (cannot_compare(dev->res.mem_resource[idx].flags))
311                 return 1;
312
313         /* check if the resource is already in use, skip if the
314          * device is active because it itself may be in use */
315         if (!dev->active) {
316                 if (check_mem_region(*addr, length(addr, end)))
317                         return 0;
318         }
319
320         /* check if the resource is reserved */
321         for (tmp = 0; tmp < 8; tmp++) {
322                 int raddr = pnp_reserve_mem[tmp << 1];
323                 int rend = pnp_reserve_mem[(tmp << 1) + 1] + raddr - 1;
324                 if (ranged_conflict(addr, end, &raddr, &rend))
325                         return 0;
326         }
327
328         /* check for internal conflicts */
329         for (tmp = 0; tmp < PNP_MAX_MEM && tmp != idx; tmp++) {
330                 if (dev->res.mem_resource[tmp].flags & IORESOURCE_MEM) {
331                         taddr = &dev->res.mem_resource[tmp].start;
332                         tend = &dev->res.mem_resource[tmp].end;
333                         if (ranged_conflict(addr, end, taddr, tend))
334                                 return 0;
335                 }
336         }
337
338         /* check for conflicts with other pnp devices */
339         pnp_for_each_dev(tdev) {
340                 if (tdev == dev)
341                         continue;
342                 for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) {
343                         if (tdev->res.mem_resource[tmp].flags & IORESOURCE_MEM) {
344                                 if (cannot_compare
345                                     (tdev->res.mem_resource[tmp].flags))
346                                         continue;
347                                 taddr = &tdev->res.mem_resource[tmp].start;
348                                 tend = &tdev->res.mem_resource[tmp].end;
349                                 if (ranged_conflict(addr, end, taddr, tend))
350                                         return 0;
351                         }
352                 }
353         }
354
355         return 1;
356 }
357
358 static irqreturn_t pnp_test_handler(int irq, void *dev_id)
359 {
360         return IRQ_HANDLED;
361 }
362
363 int pnp_check_irq(struct pnp_dev *dev, int idx)
364 {
365         int tmp;
366         struct pnp_dev *tdev;
367         resource_size_t *irq = &dev->res.irq_resource[idx].start;
368
369         /* if the resource doesn't exist, don't complain about it */
370         if (cannot_compare(dev->res.irq_resource[idx].flags))
371                 return 1;
372
373         /* check if the resource is valid */
374         if (*irq < 0 || *irq > 15)
375                 return 0;
376
377         /* check if the resource is reserved */
378         for (tmp = 0; tmp < 16; tmp++) {
379                 if (pnp_reserve_irq[tmp] == *irq)
380                         return 0;
381         }
382
383         /* check for internal conflicts */
384         for (tmp = 0; tmp < PNP_MAX_IRQ && tmp != idx; tmp++) {
385                 if (dev->res.irq_resource[tmp].flags & IORESOURCE_IRQ) {
386                         if (dev->res.irq_resource[tmp].start == *irq)
387                                 return 0;
388                 }
389         }
390
391 #ifdef CONFIG_PCI
392         /* check if the resource is being used by a pci device */
393         {
394                 struct pci_dev *pci = NULL;
395                 for_each_pci_dev(pci) {
396                         if (pci->irq == *irq) {
397                                 pci_dev_put(pci);
398                                 return 0;
399                         }
400                 }
401         }
402 #endif
403
404         /* check if the resource is already in use, skip if the
405          * device is active because it itself may be in use */
406         if (!dev->active) {
407                 if (request_irq(*irq, pnp_test_handler,
408                                 IRQF_DISABLED | IRQF_PROBE_SHARED, "pnp", NULL))
409                         return 0;
410                 free_irq(*irq, NULL);
411         }
412
413         /* check for conflicts with other pnp devices */
414         pnp_for_each_dev(tdev) {
415                 if (tdev == dev)
416                         continue;
417                 for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) {
418                         if (tdev->res.irq_resource[tmp].flags & IORESOURCE_IRQ) {
419                                 if (cannot_compare
420                                     (tdev->res.irq_resource[tmp].flags))
421                                         continue;
422                                 if ((tdev->res.irq_resource[tmp].start == *irq))
423                                         return 0;
424                         }
425                 }
426         }
427
428         return 1;
429 }
430
431 int pnp_check_dma(struct pnp_dev *dev, int idx)
432 {
433 #ifndef CONFIG_IA64
434         int tmp;
435         struct pnp_dev *tdev;
436         resource_size_t *dma = &dev->res.dma_resource[idx].start;
437
438         /* if the resource doesn't exist, don't complain about it */
439         if (cannot_compare(dev->res.dma_resource[idx].flags))
440                 return 1;
441
442         /* check if the resource is valid */
443         if (*dma < 0 || *dma == 4 || *dma > 7)
444                 return 0;
445
446         /* check if the resource is reserved */
447         for (tmp = 0; tmp < 8; tmp++) {
448                 if (pnp_reserve_dma[tmp] == *dma)
449                         return 0;
450         }
451
452         /* check for internal conflicts */
453         for (tmp = 0; tmp < PNP_MAX_DMA && tmp != idx; tmp++) {
454                 if (dev->res.dma_resource[tmp].flags & IORESOURCE_DMA) {
455                         if (dev->res.dma_resource[tmp].start == *dma)
456                                 return 0;
457                 }
458         }
459
460         /* check if the resource is already in use, skip if the
461          * device is active because it itself may be in use */
462         if (!dev->active) {
463                 if (request_dma(*dma, "pnp"))
464                         return 0;
465                 free_dma(*dma);
466         }
467
468         /* check for conflicts with other pnp devices */
469         pnp_for_each_dev(tdev) {
470                 if (tdev == dev)
471                         continue;
472                 for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) {
473                         if (tdev->res.dma_resource[tmp].flags & IORESOURCE_DMA) {
474                                 if (cannot_compare
475                                     (tdev->res.dma_resource[tmp].flags))
476                                         continue;
477                                 if ((tdev->res.dma_resource[tmp].start == *dma))
478                                         return 0;
479                         }
480                 }
481         }
482
483         return 1;
484 #else
485         /* IA64 does not have legacy DMA */
486         return 0;
487 #endif
488 }
489
490 /* format is: pnp_reserve_irq=irq1[,irq2] .... */
491 static int __init pnp_setup_reserve_irq(char *str)
492 {
493         int i;
494
495         for (i = 0; i < 16; i++)
496                 if (get_option(&str, &pnp_reserve_irq[i]) != 2)
497                         break;
498         return 1;
499 }
500
501 __setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
502
503 /* format is: pnp_reserve_dma=dma1[,dma2] .... */
504 static int __init pnp_setup_reserve_dma(char *str)
505 {
506         int i;
507
508         for (i = 0; i < 8; i++)
509                 if (get_option(&str, &pnp_reserve_dma[i]) != 2)
510                         break;
511         return 1;
512 }
513
514 __setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
515
516 /* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
517 static int __init pnp_setup_reserve_io(char *str)
518 {
519         int i;
520
521         for (i = 0; i < 16; i++)
522                 if (get_option(&str, &pnp_reserve_io[i]) != 2)
523                         break;
524         return 1;
525 }
526
527 __setup("pnp_reserve_io=", pnp_setup_reserve_io);
528
529 /* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
530 static int __init pnp_setup_reserve_mem(char *str)
531 {
532         int i;
533
534         for (i = 0; i < 16; i++)
535                 if (get_option(&str, &pnp_reserve_mem[i]) != 2)
536                         break;
537         return 1;
538 }
539
540 __setup("pnp_reserve_mem=", pnp_setup_reserve_mem);