Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices | |
3 | * | |
c1017a4c | 4 | * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz> |
1da177e4 | 5 | * Copyright 2003 Adam Belay <ambx1@neo.rr.com> |
1da177e4 LT |
6 | */ |
7 | ||
1da177e4 LT |
8 | #include <linux/errno.h> |
9 | #include <linux/module.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/kernel.h> | |
1da177e4 | 12 | #include <linux/pnp.h> |
4e57b681 TS |
13 | #include <linux/slab.h> |
14 | #include <linux/bitmap.h> | |
b3bd86e2 | 15 | #include <linux/mutex.h> |
1da177e4 LT |
16 | #include "base.h" |
17 | ||
b3bd86e2 | 18 | DEFINE_MUTEX(pnp_res_mutex); |
1da177e4 LT |
19 | |
20 | static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx) | |
21 | { | |
b60ba834 GKH |
22 | resource_size_t *start, *end; |
23 | unsigned long *flags; | |
1da177e4 | 24 | |
1da177e4 | 25 | if (idx >= PNP_MAX_PORT) { |
a05d0781 | 26 | dev_err(&dev->dev, "too many I/O port resources\n"); |
1da177e4 LT |
27 | /* pretend we were successful so at least the manager won't try again */ |
28 | return 1; | |
29 | } | |
30 | ||
1da177e4 LT |
31 | start = &dev->res.port_resource[idx].start; |
32 | end = &dev->res.port_resource[idx].end; | |
33 | flags = &dev->res.port_resource[idx].flags; | |
34 | ||
81b5c75f BH |
35 | /* check if this resource has been manually set, if so skip */ |
36 | if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO)) { | |
37 | dev_dbg(&dev->dev, " io %d already set to %#llx-%#llx " | |
38 | "flags %#lx\n", idx, (unsigned long long) *start, | |
39 | (unsigned long long) *end, *flags); | |
40 | return 1; | |
41 | } | |
42 | ||
1da177e4 LT |
43 | /* set the initial values */ |
44 | *flags |= rule->flags | IORESOURCE_IO; | |
9dd78466 | 45 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
46 | |
47 | if (!rule->size) { | |
48 | *flags |= IORESOURCE_DISABLED; | |
81b5c75f | 49 | dev_dbg(&dev->dev, " io %d disabled\n", idx); |
9dd78466 | 50 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
51 | } |
52 | ||
53 | *start = rule->min; | |
54 | *end = *start + rule->size - 1; | |
55 | ||
56 | /* run through until pnp_check_port is happy */ | |
57 | while (!pnp_check_port(dev, idx)) { | |
58 | *start += rule->align; | |
59 | *end = *start + rule->size - 1; | |
81b5c75f BH |
60 | if (*start > rule->max || !rule->align) { |
61 | dev_dbg(&dev->dev, " couldn't assign io %d\n", idx); | |
1da177e4 | 62 | return 0; |
81b5c75f | 63 | } |
1da177e4 | 64 | } |
81b5c75f BH |
65 | dev_dbg(&dev->dev, " assign io %d %#llx-%#llx\n", idx, |
66 | (unsigned long long) *start, (unsigned long long) *end); | |
1da177e4 LT |
67 | return 1; |
68 | } | |
69 | ||
70 | static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx) | |
71 | { | |
b60ba834 GKH |
72 | resource_size_t *start, *end; |
73 | unsigned long *flags; | |
1da177e4 | 74 | |
1da177e4 | 75 | if (idx >= PNP_MAX_MEM) { |
a05d0781 | 76 | dev_err(&dev->dev, "too many memory resources\n"); |
1da177e4 LT |
77 | /* pretend we were successful so at least the manager won't try again */ |
78 | return 1; | |
79 | } | |
80 | ||
1da177e4 LT |
81 | start = &dev->res.mem_resource[idx].start; |
82 | end = &dev->res.mem_resource[idx].end; | |
83 | flags = &dev->res.mem_resource[idx].flags; | |
84 | ||
81b5c75f BH |
85 | /* check if this resource has been manually set, if so skip */ |
86 | if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO)) { | |
87 | dev_dbg(&dev->dev, " mem %d already set to %#llx-%#llx " | |
88 | "flags %#lx\n", idx, (unsigned long long) *start, | |
89 | (unsigned long long) *end, *flags); | |
90 | return 1; | |
91 | } | |
92 | ||
1da177e4 LT |
93 | /* set the initial values */ |
94 | *flags |= rule->flags | IORESOURCE_MEM; | |
9dd78466 | 95 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
96 | |
97 | /* convert pnp flags to standard Linux flags */ | |
98 | if (!(rule->flags & IORESOURCE_MEM_WRITEABLE)) | |
99 | *flags |= IORESOURCE_READONLY; | |
100 | if (rule->flags & IORESOURCE_MEM_CACHEABLE) | |
101 | *flags |= IORESOURCE_CACHEABLE; | |
102 | if (rule->flags & IORESOURCE_MEM_RANGELENGTH) | |
103 | *flags |= IORESOURCE_RANGELENGTH; | |
104 | if (rule->flags & IORESOURCE_MEM_SHADOWABLE) | |
105 | *flags |= IORESOURCE_SHADOWABLE; | |
106 | ||
107 | if (!rule->size) { | |
108 | *flags |= IORESOURCE_DISABLED; | |
81b5c75f | 109 | dev_dbg(&dev->dev, " mem %d disabled\n", idx); |
9dd78466 | 110 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
111 | } |
112 | ||
113 | *start = rule->min; | |
9dd78466 | 114 | *end = *start + rule->size - 1; |
1da177e4 LT |
115 | |
116 | /* run through until pnp_check_mem is happy */ | |
117 | while (!pnp_check_mem(dev, idx)) { | |
118 | *start += rule->align; | |
119 | *end = *start + rule->size - 1; | |
81b5c75f BH |
120 | if (*start > rule->max || !rule->align) { |
121 | dev_dbg(&dev->dev, " couldn't assign mem %d\n", idx); | |
1da177e4 | 122 | return 0; |
81b5c75f | 123 | } |
1da177e4 | 124 | } |
81b5c75f BH |
125 | dev_dbg(&dev->dev, " assign mem %d %#llx-%#llx\n", idx, |
126 | (unsigned long long) *start, (unsigned long long) *end); | |
1da177e4 LT |
127 | return 1; |
128 | } | |
129 | ||
9dd78466 | 130 | static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx) |
1da177e4 | 131 | { |
b60ba834 GKH |
132 | resource_size_t *start, *end; |
133 | unsigned long *flags; | |
1da177e4 LT |
134 | int i; |
135 | ||
136 | /* IRQ priority: this table is good for i386 */ | |
137 | static unsigned short xtab[16] = { | |
138 | 5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2 | |
139 | }; | |
140 | ||
1da177e4 | 141 | if (idx >= PNP_MAX_IRQ) { |
a05d0781 | 142 | dev_err(&dev->dev, "too many IRQ resources\n"); |
1da177e4 LT |
143 | /* pretend we were successful so at least the manager won't try again */ |
144 | return 1; | |
145 | } | |
146 | ||
1da177e4 LT |
147 | start = &dev->res.irq_resource[idx].start; |
148 | end = &dev->res.irq_resource[idx].end; | |
149 | flags = &dev->res.irq_resource[idx].flags; | |
150 | ||
81b5c75f BH |
151 | /* check if this resource has been manually set, if so skip */ |
152 | if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO)) { | |
153 | dev_dbg(&dev->dev, " irq %d already set to %d flags %#lx\n", | |
154 | idx, (int) *start, *flags); | |
155 | return 1; | |
156 | } | |
157 | ||
1da177e4 LT |
158 | /* set the initial values */ |
159 | *flags |= rule->flags | IORESOURCE_IRQ; | |
9dd78466 | 160 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 LT |
161 | |
162 | if (bitmap_empty(rule->map, PNP_IRQ_NR)) { | |
163 | *flags |= IORESOURCE_DISABLED; | |
81b5c75f | 164 | dev_dbg(&dev->dev, " irq %d disabled\n", idx); |
9dd78466 | 165 | return 1; /* skip disabled resource requests */ |
1da177e4 LT |
166 | } |
167 | ||
168 | /* TBD: need check for >16 IRQ */ | |
169 | *start = find_next_bit(rule->map, PNP_IRQ_NR, 16); | |
170 | if (*start < PNP_IRQ_NR) { | |
171 | *end = *start; | |
81b5c75f | 172 | dev_dbg(&dev->dev, " assign irq %d %d\n", idx, (int) *start); |
1da177e4 LT |
173 | return 1; |
174 | } | |
175 | for (i = 0; i < 16; i++) { | |
9dd78466 | 176 | if (test_bit(xtab[i], rule->map)) { |
1da177e4 | 177 | *start = *end = xtab[i]; |
81b5c75f BH |
178 | if (pnp_check_irq(dev, idx)) { |
179 | dev_dbg(&dev->dev, " assign irq %d %d\n", idx, | |
180 | (int) *start); | |
1da177e4 | 181 | return 1; |
81b5c75f | 182 | } |
1da177e4 LT |
183 | } |
184 | } | |
81b5c75f | 185 | dev_dbg(&dev->dev, " couldn't assign irq %d\n", idx); |
1da177e4 LT |
186 | return 0; |
187 | } | |
188 | ||
7ef36390 | 189 | static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx) |
1da177e4 | 190 | { |
b60ba834 GKH |
191 | resource_size_t *start, *end; |
192 | unsigned long *flags; | |
1da177e4 LT |
193 | int i; |
194 | ||
195 | /* DMA priority: this table is good for i386 */ | |
196 | static unsigned short xtab[8] = { | |
197 | 1, 3, 5, 6, 7, 0, 2, 4 | |
198 | }; | |
199 | ||
1da177e4 | 200 | if (idx >= PNP_MAX_DMA) { |
a05d0781 | 201 | dev_err(&dev->dev, "too many DMA resources\n"); |
7ef36390 | 202 | return; |
1da177e4 LT |
203 | } |
204 | ||
1da177e4 LT |
205 | start = &dev->res.dma_resource[idx].start; |
206 | end = &dev->res.dma_resource[idx].end; | |
207 | flags = &dev->res.dma_resource[idx].flags; | |
208 | ||
81b5c75f BH |
209 | /* check if this resource has been manually set, if so skip */ |
210 | if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO)) { | |
211 | dev_dbg(&dev->dev, " dma %d already set to %d flags %#lx\n", | |
212 | idx, (int) *start, *flags); | |
213 | return; | |
214 | } | |
215 | ||
1da177e4 LT |
216 | /* set the initial values */ |
217 | *flags |= rule->flags | IORESOURCE_DMA; | |
9dd78466 | 218 | *flags &= ~IORESOURCE_UNSET; |
1da177e4 | 219 | |
1da177e4 | 220 | for (i = 0; i < 8; i++) { |
9dd78466 | 221 | if (rule->map & (1 << xtab[i])) { |
1da177e4 | 222 | *start = *end = xtab[i]; |
81b5c75f BH |
223 | if (pnp_check_dma(dev, idx)) { |
224 | dev_dbg(&dev->dev, " assign dma %d %d\n", idx, | |
225 | (int) *start); | |
7ef36390 | 226 | return; |
81b5c75f | 227 | } |
1da177e4 LT |
228 | } |
229 | } | |
7ef36390 JB |
230 | #ifdef MAX_DMA_CHANNELS |
231 | *start = *end = MAX_DMA_CHANNELS; | |
232 | #endif | |
233 | *flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED; | |
81b5c75f | 234 | dev_dbg(&dev->dev, " disable dma %d\n", idx); |
1da177e4 LT |
235 | } |
236 | ||
237 | /** | |
238 | * pnp_init_resources - Resets a resource table to default values. | |
239 | * @table: pointer to the desired resource table | |
1da177e4 | 240 | */ |
2cd13930 | 241 | void pnp_init_resources(struct pnp_dev *dev) |
1da177e4 | 242 | { |
2cd13930 | 243 | struct pnp_resource_table *table = &dev->res; |
1da177e4 | 244 | int idx; |
07d4e9af | 245 | |
1da177e4 LT |
246 | for (idx = 0; idx < PNP_MAX_IRQ; idx++) { |
247 | table->irq_resource[idx].name = NULL; | |
248 | table->irq_resource[idx].start = -1; | |
249 | table->irq_resource[idx].end = -1; | |
9dd78466 BH |
250 | table->irq_resource[idx].flags = |
251 | IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
252 | } |
253 | for (idx = 0; idx < PNP_MAX_DMA; idx++) { | |
254 | table->dma_resource[idx].name = NULL; | |
255 | table->dma_resource[idx].start = -1; | |
256 | table->dma_resource[idx].end = -1; | |
9dd78466 BH |
257 | table->dma_resource[idx].flags = |
258 | IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
259 | } |
260 | for (idx = 0; idx < PNP_MAX_PORT; idx++) { | |
261 | table->port_resource[idx].name = NULL; | |
262 | table->port_resource[idx].start = 0; | |
263 | table->port_resource[idx].end = 0; | |
9dd78466 BH |
264 | table->port_resource[idx].flags = |
265 | IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
266 | } |
267 | for (idx = 0; idx < PNP_MAX_MEM; idx++) { | |
268 | table->mem_resource[idx].name = NULL; | |
269 | table->mem_resource[idx].start = 0; | |
270 | table->mem_resource[idx].end = 0; | |
9dd78466 BH |
271 | table->mem_resource[idx].flags = |
272 | IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
273 | } |
274 | } | |
275 | ||
276 | /** | |
277 | * pnp_clean_resources - clears resources that were not manually set | |
67be2dd1 | 278 | * @res: the resources to clean |
1da177e4 | 279 | */ |
6969c7ed | 280 | static void pnp_clean_resource_table(struct pnp_dev *dev) |
1da177e4 | 281 | { |
6969c7ed | 282 | struct pnp_resource_table *res = &dev->res; |
1da177e4 | 283 | int idx; |
07d4e9af | 284 | |
1da177e4 LT |
285 | for (idx = 0; idx < PNP_MAX_IRQ; idx++) { |
286 | if (!(res->irq_resource[idx].flags & IORESOURCE_AUTO)) | |
287 | continue; | |
288 | res->irq_resource[idx].start = -1; | |
289 | res->irq_resource[idx].end = -1; | |
9dd78466 BH |
290 | res->irq_resource[idx].flags = |
291 | IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
292 | } |
293 | for (idx = 0; idx < PNP_MAX_DMA; idx++) { | |
294 | if (!(res->dma_resource[idx].flags & IORESOURCE_AUTO)) | |
295 | continue; | |
296 | res->dma_resource[idx].start = -1; | |
297 | res->dma_resource[idx].end = -1; | |
9dd78466 BH |
298 | res->dma_resource[idx].flags = |
299 | IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
300 | } |
301 | for (idx = 0; idx < PNP_MAX_PORT; idx++) { | |
302 | if (!(res->port_resource[idx].flags & IORESOURCE_AUTO)) | |
303 | continue; | |
304 | res->port_resource[idx].start = 0; | |
305 | res->port_resource[idx].end = 0; | |
9dd78466 BH |
306 | res->port_resource[idx].flags = |
307 | IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
308 | } |
309 | for (idx = 0; idx < PNP_MAX_MEM; idx++) { | |
310 | if (!(res->mem_resource[idx].flags & IORESOURCE_AUTO)) | |
311 | continue; | |
312 | res->mem_resource[idx].start = 0; | |
313 | res->mem_resource[idx].end = 0; | |
9dd78466 BH |
314 | res->mem_resource[idx].flags = |
315 | IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET; | |
1da177e4 LT |
316 | } |
317 | } | |
318 | ||
319 | /** | |
320 | * pnp_assign_resources - assigns resources to the device based on the specified dependent number | |
321 | * @dev: pointer to the desired device | |
322 | * @depnum: the dependent function number | |
323 | * | |
324 | * Only set depnum to 0 if the device does not have dependent options. | |
325 | */ | |
326 | static int pnp_assign_resources(struct pnp_dev *dev, int depnum) | |
327 | { | |
328 | struct pnp_port *port; | |
329 | struct pnp_mem *mem; | |
330 | struct pnp_irq *irq; | |
331 | struct pnp_dma *dma; | |
332 | int nport = 0, nmem = 0, nirq = 0, ndma = 0; | |
333 | ||
334 | if (!pnp_can_configure(dev)) | |
335 | return -ENODEV; | |
336 | ||
81b5c75f | 337 | dbg_pnp_show_resources(dev, "before pnp_assign_resources"); |
b3bd86e2 | 338 | mutex_lock(&pnp_res_mutex); |
6969c7ed | 339 | pnp_clean_resource_table(dev); |
1da177e4 | 340 | if (dev->independent) { |
81b5c75f | 341 | dev_dbg(&dev->dev, "assigning independent options\n"); |
1da177e4 LT |
342 | port = dev->independent->port; |
343 | mem = dev->independent->mem; | |
344 | irq = dev->independent->irq; | |
345 | dma = dev->independent->dma; | |
346 | while (port) { | |
347 | if (!pnp_assign_port(dev, port, nport)) | |
348 | goto fail; | |
349 | nport++; | |
350 | port = port->next; | |
351 | } | |
352 | while (mem) { | |
353 | if (!pnp_assign_mem(dev, mem, nmem)) | |
354 | goto fail; | |
355 | nmem++; | |
356 | mem = mem->next; | |
357 | } | |
358 | while (irq) { | |
359 | if (!pnp_assign_irq(dev, irq, nirq)) | |
360 | goto fail; | |
361 | nirq++; | |
362 | irq = irq->next; | |
363 | } | |
364 | while (dma) { | |
7ef36390 | 365 | pnp_assign_dma(dev, dma, ndma); |
1da177e4 LT |
366 | ndma++; |
367 | dma = dma->next; | |
368 | } | |
369 | } | |
370 | ||
371 | if (depnum) { | |
372 | struct pnp_option *dep; | |
373 | int i; | |
81b5c75f BH |
374 | |
375 | dev_dbg(&dev->dev, "assigning dependent option %d\n", depnum); | |
9dd78466 BH |
376 | for (i = 1, dep = dev->dependent; i < depnum; |
377 | i++, dep = dep->next) | |
378 | if (!dep) | |
1da177e4 | 379 | goto fail; |
9dd78466 | 380 | port = dep->port; |
1da177e4 LT |
381 | mem = dep->mem; |
382 | irq = dep->irq; | |
383 | dma = dep->dma; | |
384 | while (port) { | |
385 | if (!pnp_assign_port(dev, port, nport)) | |
386 | goto fail; | |
387 | nport++; | |
388 | port = port->next; | |
389 | } | |
390 | while (mem) { | |
391 | if (!pnp_assign_mem(dev, mem, nmem)) | |
392 | goto fail; | |
393 | nmem++; | |
394 | mem = mem->next; | |
395 | } | |
396 | while (irq) { | |
397 | if (!pnp_assign_irq(dev, irq, nirq)) | |
398 | goto fail; | |
399 | nirq++; | |
400 | irq = irq->next; | |
401 | } | |
402 | while (dma) { | |
7ef36390 | 403 | pnp_assign_dma(dev, dma, ndma); |
1da177e4 LT |
404 | ndma++; |
405 | dma = dma->next; | |
406 | } | |
407 | } else if (dev->dependent) | |
408 | goto fail; | |
409 | ||
b3bd86e2 | 410 | mutex_unlock(&pnp_res_mutex); |
81b5c75f | 411 | dbg_pnp_show_resources(dev, "after pnp_assign_resources"); |
1da177e4 LT |
412 | return 1; |
413 | ||
1e0aa9ad | 414 | fail: |
6969c7ed | 415 | pnp_clean_resource_table(dev); |
b3bd86e2 | 416 | mutex_unlock(&pnp_res_mutex); |
81b5c75f | 417 | dbg_pnp_show_resources(dev, "after pnp_assign_resources (failed)"); |
1da177e4 LT |
418 | return 0; |
419 | } | |
420 | ||
1da177e4 LT |
421 | /** |
422 | * pnp_auto_config_dev - automatically assigns resources to a device | |
423 | * @dev: pointer to the desired device | |
1da177e4 LT |
424 | */ |
425 | int pnp_auto_config_dev(struct pnp_dev *dev) | |
426 | { | |
427 | struct pnp_option *dep; | |
428 | int i = 1; | |
429 | ||
9dd78466 | 430 | if (!pnp_can_configure(dev)) { |
a05d0781 | 431 | dev_dbg(&dev->dev, "configuration not supported\n"); |
1da177e4 LT |
432 | return -ENODEV; |
433 | } | |
434 | ||
435 | if (!dev->dependent) { | |
436 | if (pnp_assign_resources(dev, 0)) | |
437 | return 0; | |
438 | } else { | |
439 | dep = dev->dependent; | |
440 | do { | |
441 | if (pnp_assign_resources(dev, i)) | |
442 | return 0; | |
443 | dep = dep->next; | |
444 | i++; | |
445 | } while (dep); | |
446 | } | |
447 | ||
a05d0781 | 448 | dev_err(&dev->dev, "unable to assign resources\n"); |
1da177e4 LT |
449 | return -EBUSY; |
450 | } | |
451 | ||
68094e32 PO |
452 | /** |
453 | * pnp_start_dev - low-level start of the PnP device | |
454 | * @dev: pointer to the desired device | |
455 | * | |
07d4e9af | 456 | * assumes that resources have already been allocated |
68094e32 | 457 | */ |
68094e32 PO |
458 | int pnp_start_dev(struct pnp_dev *dev) |
459 | { | |
460 | if (!pnp_can_write(dev)) { | |
a05d0781 | 461 | dev_dbg(&dev->dev, "activation not supported\n"); |
68094e32 PO |
462 | return -EINVAL; |
463 | } | |
464 | ||
81b5c75f | 465 | dbg_pnp_show_resources(dev, "pnp_start_dev"); |
59284cb4 | 466 | if (dev->protocol->set(dev) < 0) { |
a05d0781 | 467 | dev_err(&dev->dev, "activation failed\n"); |
68094e32 PO |
468 | return -EIO; |
469 | } | |
470 | ||
a05d0781 | 471 | dev_info(&dev->dev, "activated\n"); |
68094e32 PO |
472 | return 0; |
473 | } | |
474 | ||
475 | /** | |
476 | * pnp_stop_dev - low-level disable of the PnP device | |
477 | * @dev: pointer to the desired device | |
478 | * | |
479 | * does not free resources | |
480 | */ | |
68094e32 PO |
481 | int pnp_stop_dev(struct pnp_dev *dev) |
482 | { | |
483 | if (!pnp_can_disable(dev)) { | |
a05d0781 | 484 | dev_dbg(&dev->dev, "disabling not supported\n"); |
68094e32 PO |
485 | return -EINVAL; |
486 | } | |
9dd78466 | 487 | if (dev->protocol->disable(dev) < 0) { |
a05d0781 | 488 | dev_err(&dev->dev, "disable failed\n"); |
68094e32 PO |
489 | return -EIO; |
490 | } | |
491 | ||
a05d0781 | 492 | dev_info(&dev->dev, "disabled\n"); |
68094e32 PO |
493 | return 0; |
494 | } | |
495 | ||
1da177e4 LT |
496 | /** |
497 | * pnp_activate_dev - activates a PnP device for use | |
498 | * @dev: pointer to the desired device | |
499 | * | |
500 | * does not validate or set resources so be careful. | |
501 | */ | |
502 | int pnp_activate_dev(struct pnp_dev *dev) | |
503 | { | |
68094e32 PO |
504 | int error; |
505 | ||
07d4e9af | 506 | if (dev->active) |
cc8259a6 | 507 | return 0; |
1da177e4 LT |
508 | |
509 | /* ensure resources are allocated */ | |
510 | if (pnp_auto_config_dev(dev)) | |
511 | return -EBUSY; | |
512 | ||
68094e32 PO |
513 | error = pnp_start_dev(dev); |
514 | if (error) | |
515 | return error; | |
1da177e4 LT |
516 | |
517 | dev->active = 1; | |
cc8259a6 | 518 | return 0; |
1da177e4 LT |
519 | } |
520 | ||
521 | /** | |
522 | * pnp_disable_dev - disables device | |
523 | * @dev: pointer to the desired device | |
524 | * | |
525 | * inform the correct pnp protocol so that resources can be used by other devices | |
526 | */ | |
527 | int pnp_disable_dev(struct pnp_dev *dev) | |
528 | { | |
68094e32 PO |
529 | int error; |
530 | ||
07d4e9af | 531 | if (!dev->active) |
cc8259a6 | 532 | return 0; |
1da177e4 | 533 | |
68094e32 PO |
534 | error = pnp_stop_dev(dev); |
535 | if (error) | |
536 | return error; | |
1da177e4 LT |
537 | |
538 | dev->active = 0; | |
1da177e4 LT |
539 | |
540 | /* release the resources so that other devices can use them */ | |
b3bd86e2 | 541 | mutex_lock(&pnp_res_mutex); |
6969c7ed | 542 | pnp_clean_resource_table(dev); |
b3bd86e2 | 543 | mutex_unlock(&pnp_res_mutex); |
1da177e4 | 544 | |
cc8259a6 | 545 | return 0; |
1da177e4 LT |
546 | } |
547 | ||
68094e32 PO |
548 | EXPORT_SYMBOL(pnp_start_dev); |
549 | EXPORT_SYMBOL(pnp_stop_dev); | |
1da177e4 LT |
550 | EXPORT_SYMBOL(pnp_activate_dev); |
551 | EXPORT_SYMBOL(pnp_disable_dev); |