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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * interface.c - contains everything related to the user interface | |
4 | * | |
c1017a4c | 5 | * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz> |
1da177e4 | 6 | * Copyright 2002 Adam Belay <ambx1@neo.rr.com> |
1f32ca31 BH |
7 | * Copyright (C) 2008 Hewlett-Packard Development Company, L.P. |
8 | * Bjorn Helgaas <bjorn.helgaas@hp.com> | |
1da177e4 LT |
9 | */ |
10 | ||
11 | #include <linux/pnp.h> | |
12 | #include <linux/string.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/list.h> | |
15 | #include <linux/types.h> | |
16 | #include <linux/stat.h> | |
17 | #include <linux/ctype.h> | |
18 | #include <linux/slab.h> | |
b3bd86e2 DW |
19 | #include <linux/mutex.h> |
20 | ||
7c0f6ba6 | 21 | #include <linux/uaccess.h> |
1da177e4 LT |
22 | |
23 | #include "base.h" | |
24 | ||
25 | struct pnp_info_buffer { | |
26 | char *buffer; /* pointer to begin of buffer */ | |
27 | char *curr; /* current position in buffer */ | |
28 | unsigned long size; /* current size */ | |
29 | unsigned long len; /* total length of buffer */ | |
30 | int stop; /* stop flag */ | |
31 | int error; /* error code */ | |
32 | }; | |
33 | ||
34 | typedef struct pnp_info_buffer pnp_info_buffer_t; | |
35 | ||
b1f4213c | 36 | __printf(2, 3) |
9dd78466 | 37 | static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...) |
1da177e4 LT |
38 | { |
39 | va_list args; | |
40 | int res; | |
41 | ||
42 | if (buffer->stop || buffer->error) | |
43 | return 0; | |
44 | va_start(args, fmt); | |
45 | res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args); | |
46 | va_end(args); | |
47 | if (buffer->size + res >= buffer->len) { | |
48 | buffer->stop = 1; | |
49 | return 0; | |
50 | } | |
51 | buffer->curr += res; | |
52 | buffer->size += res; | |
53 | return res; | |
54 | } | |
55 | ||
9dd78466 BH |
56 | static void pnp_print_port(pnp_info_buffer_t * buffer, char *space, |
57 | struct pnp_port *port) | |
1da177e4 | 58 | { |
169aaffe BH |
59 | pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, " |
60 | "%i-bit address decoding\n", space, | |
61 | (unsigned long long) port->min, | |
62 | (unsigned long long) port->max, | |
63 | port->align ? ((unsigned long long) port->align - 1) : 0, | |
64 | (unsigned long long) port->size, | |
08c9f262 | 65 | port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10); |
1da177e4 LT |
66 | } |
67 | ||
9dd78466 BH |
68 | static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space, |
69 | struct pnp_irq *irq) | |
1da177e4 LT |
70 | { |
71 | int first = 1, i; | |
72 | ||
73 | pnp_printf(buffer, "%sirq ", space); | |
74 | for (i = 0; i < PNP_IRQ_NR; i++) | |
7aefff51 | 75 | if (test_bit(i, irq->map.bits)) { |
1da177e4 LT |
76 | if (!first) { |
77 | pnp_printf(buffer, ","); | |
78 | } else { | |
79 | first = 0; | |
80 | } | |
81 | if (i == 2 || i == 9) | |
82 | pnp_printf(buffer, "2/9"); | |
83 | else | |
84 | pnp_printf(buffer, "%i", i); | |
85 | } | |
7aefff51 | 86 | if (bitmap_empty(irq->map.bits, PNP_IRQ_NR)) |
1da177e4 LT |
87 | pnp_printf(buffer, "<none>"); |
88 | if (irq->flags & IORESOURCE_IRQ_HIGHEDGE) | |
89 | pnp_printf(buffer, " High-Edge"); | |
90 | if (irq->flags & IORESOURCE_IRQ_LOWEDGE) | |
91 | pnp_printf(buffer, " Low-Edge"); | |
92 | if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL) | |
93 | pnp_printf(buffer, " High-Level"); | |
94 | if (irq->flags & IORESOURCE_IRQ_LOWLEVEL) | |
95 | pnp_printf(buffer, " Low-Level"); | |
d5ebde6e BH |
96 | if (irq->flags & IORESOURCE_IRQ_OPTIONAL) |
97 | pnp_printf(buffer, " (optional)"); | |
1da177e4 LT |
98 | pnp_printf(buffer, "\n"); |
99 | } | |
100 | ||
9dd78466 BH |
101 | static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space, |
102 | struct pnp_dma *dma) | |
1da177e4 LT |
103 | { |
104 | int first = 1, i; | |
105 | char *s; | |
106 | ||
107 | pnp_printf(buffer, "%sdma ", space); | |
108 | for (i = 0; i < 8; i++) | |
9dd78466 | 109 | if (dma->map & (1 << i)) { |
1da177e4 LT |
110 | if (!first) { |
111 | pnp_printf(buffer, ","); | |
112 | } else { | |
113 | first = 0; | |
114 | } | |
115 | pnp_printf(buffer, "%i", i); | |
116 | } | |
117 | if (!dma->map) | |
118 | pnp_printf(buffer, "<none>"); | |
119 | switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) { | |
120 | case IORESOURCE_DMA_8BIT: | |
121 | s = "8-bit"; | |
122 | break; | |
123 | case IORESOURCE_DMA_8AND16BIT: | |
124 | s = "8-bit&16-bit"; | |
125 | break; | |
126 | default: | |
127 | s = "16-bit"; | |
128 | } | |
129 | pnp_printf(buffer, " %s", s); | |
130 | if (dma->flags & IORESOURCE_DMA_MASTER) | |
131 | pnp_printf(buffer, " master"); | |
132 | if (dma->flags & IORESOURCE_DMA_BYTE) | |
133 | pnp_printf(buffer, " byte-count"); | |
134 | if (dma->flags & IORESOURCE_DMA_WORD) | |
135 | pnp_printf(buffer, " word-count"); | |
136 | switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) { | |
137 | case IORESOURCE_DMA_TYPEA: | |
138 | s = "type-A"; | |
139 | break; | |
140 | case IORESOURCE_DMA_TYPEB: | |
141 | s = "type-B"; | |
142 | break; | |
143 | case IORESOURCE_DMA_TYPEF: | |
144 | s = "type-F"; | |
145 | break; | |
146 | default: | |
147 | s = "compatible"; | |
148 | break; | |
149 | } | |
150 | pnp_printf(buffer, " %s\n", s); | |
151 | } | |
152 | ||
9dd78466 BH |
153 | static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space, |
154 | struct pnp_mem *mem) | |
1da177e4 LT |
155 | { |
156 | char *s; | |
157 | ||
169aaffe BH |
158 | pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx", |
159 | space, (unsigned long long) mem->min, | |
160 | (unsigned long long) mem->max, | |
161 | (unsigned long long) mem->align, | |
162 | (unsigned long long) mem->size); | |
1da177e4 LT |
163 | if (mem->flags & IORESOURCE_MEM_WRITEABLE) |
164 | pnp_printf(buffer, ", writeable"); | |
165 | if (mem->flags & IORESOURCE_MEM_CACHEABLE) | |
166 | pnp_printf(buffer, ", cacheable"); | |
167 | if (mem->flags & IORESOURCE_MEM_RANGELENGTH) | |
168 | pnp_printf(buffer, ", range-length"); | |
169 | if (mem->flags & IORESOURCE_MEM_SHADOWABLE) | |
170 | pnp_printf(buffer, ", shadowable"); | |
171 | if (mem->flags & IORESOURCE_MEM_EXPANSIONROM) | |
172 | pnp_printf(buffer, ", expansion ROM"); | |
173 | switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) { | |
174 | case IORESOURCE_MEM_8BIT: | |
175 | s = "8-bit"; | |
176 | break; | |
177 | case IORESOURCE_MEM_8AND16BIT: | |
178 | s = "8-bit&16-bit"; | |
179 | break; | |
180 | case IORESOURCE_MEM_32BIT: | |
181 | s = "32-bit"; | |
182 | break; | |
183 | default: | |
184 | s = "16-bit"; | |
185 | } | |
186 | pnp_printf(buffer, ", %s\n", s); | |
187 | } | |
188 | ||
9dd78466 | 189 | static void pnp_print_option(pnp_info_buffer_t * buffer, char *space, |
1f32ca31 | 190 | struct pnp_option *option) |
1da177e4 | 191 | { |
1f32ca31 BH |
192 | switch (option->type) { |
193 | case IORESOURCE_IO: | |
194 | pnp_print_port(buffer, space, &option->u.port); | |
195 | break; | |
196 | case IORESOURCE_MEM: | |
197 | pnp_print_mem(buffer, space, &option->u.mem); | |
198 | break; | |
199 | case IORESOURCE_IRQ: | |
200 | pnp_print_irq(buffer, space, &option->u.irq); | |
201 | break; | |
202 | case IORESOURCE_DMA: | |
203 | pnp_print_dma(buffer, space, &option->u.dma); | |
204 | break; | |
1da177e4 | 205 | } |
1da177e4 LT |
206 | } |
207 | ||
2df43901 GKH |
208 | static ssize_t options_show(struct device *dmdev, struct device_attribute *attr, |
209 | char *buf) | |
1da177e4 LT |
210 | { |
211 | struct pnp_dev *dev = to_pnp_dev(dmdev); | |
b72ee1f1 | 212 | pnp_info_buffer_t *buffer; |
1f32ca31 BH |
213 | struct pnp_option *option; |
214 | int ret, dep = 0, set = 0; | |
215 | char *indent; | |
1da177e4 | 216 | |
b72ee1f1 | 217 | buffer = pnp_alloc(sizeof(pnp_info_buffer_t)); |
1da177e4 LT |
218 | if (!buffer) |
219 | return -ENOMEM; | |
220 | ||
221 | buffer->len = PAGE_SIZE; | |
222 | buffer->buffer = buf; | |
223 | buffer->curr = buffer->buffer; | |
1da177e4 | 224 | |
1f32ca31 BH |
225 | list_for_each_entry(option, &dev->options, list) { |
226 | if (pnp_option_is_dependent(option)) { | |
227 | indent = " "; | |
228 | if (!dep || pnp_option_set(option) != set) { | |
229 | set = pnp_option_set(option); | |
230 | dep = 1; | |
231 | pnp_printf(buffer, "Dependent: %02i - " | |
232 | "Priority %s\n", set, | |
233 | pnp_option_priority_name(option)); | |
234 | } | |
235 | } else { | |
236 | dep = 0; | |
237 | indent = ""; | |
238 | } | |
239 | pnp_print_option(buffer, indent, option); | |
1da177e4 | 240 | } |
1f32ca31 | 241 | |
1da177e4 LT |
242 | ret = (buffer->curr - buf); |
243 | kfree(buffer); | |
244 | return ret; | |
245 | } | |
2df43901 | 246 | static DEVICE_ATTR_RO(options); |
1da177e4 | 247 | |
2df43901 GKH |
248 | static ssize_t resources_show(struct device *dmdev, |
249 | struct device_attribute *attr, char *buf) | |
1da177e4 LT |
250 | { |
251 | struct pnp_dev *dev = to_pnp_dev(dmdev); | |
b72ee1f1 | 252 | pnp_info_buffer_t *buffer; |
f61ed7e3 | 253 | struct pnp_resource *pnp_res; |
95ab3669 | 254 | struct resource *res; |
f61ed7e3 | 255 | int ret; |
1da177e4 LT |
256 | |
257 | if (!dev) | |
258 | return -EINVAL; | |
259 | ||
b72ee1f1 | 260 | buffer = pnp_alloc(sizeof(pnp_info_buffer_t)); |
1da177e4 LT |
261 | if (!buffer) |
262 | return -ENOMEM; | |
b72ee1f1 | 263 | |
1da177e4 LT |
264 | buffer->len = PAGE_SIZE; |
265 | buffer->buffer = buf; | |
266 | buffer->curr = buffer->buffer; | |
267 | ||
f61ed7e3 | 268 | pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled"); |
1da177e4 | 269 | |
f61ed7e3 BH |
270 | list_for_each_entry(pnp_res, &dev->resources, list) { |
271 | res = &pnp_res->res; | |
272 | ||
273 | pnp_printf(buffer, pnp_resource_type_name(res)); | |
274 | ||
275 | if (res->flags & IORESOURCE_DISABLED) { | |
aee3ad81 | 276 | pnp_printf(buffer, " disabled\n"); |
f61ed7e3 BH |
277 | continue; |
278 | } | |
279 | ||
280 | switch (pnp_resource_type(res)) { | |
281 | case IORESOURCE_IO: | |
282 | case IORESOURCE_MEM: | |
7e0e9c04 | 283 | case IORESOURCE_BUS: |
fa35b492 | 284 | pnp_printf(buffer, " %#llx-%#llx%s\n", |
aee3ad81 | 285 | (unsigned long long) res->start, |
fa35b492 BH |
286 | (unsigned long long) res->end, |
287 | res->flags & IORESOURCE_WINDOW ? | |
288 | " window" : ""); | |
f61ed7e3 BH |
289 | break; |
290 | case IORESOURCE_IRQ: | |
291 | case IORESOURCE_DMA: | |
aee3ad81 BH |
292 | pnp_printf(buffer, " %lld\n", |
293 | (unsigned long long) res->start); | |
f61ed7e3 BH |
294 | break; |
295 | } | |
1da177e4 | 296 | } |
f61ed7e3 | 297 | |
1da177e4 LT |
298 | ret = (buffer->curr - buf); |
299 | kfree(buffer); | |
300 | return ret; | |
301 | } | |
302 | ||
c9377667 WS |
303 | static char *pnp_get_resource_value(char *buf, |
304 | unsigned long type, | |
305 | resource_size_t *start, | |
306 | resource_size_t *end, | |
307 | unsigned long *flags) | |
308 | { | |
309 | if (start) | |
310 | *start = 0; | |
311 | if (end) | |
312 | *end = 0; | |
313 | if (flags) | |
314 | *flags = 0; | |
315 | ||
316 | /* TBD: allow for disabled resources */ | |
317 | ||
318 | buf = skip_spaces(buf); | |
319 | if (start) { | |
320 | *start = simple_strtoull(buf, &buf, 0); | |
321 | if (end) { | |
322 | buf = skip_spaces(buf); | |
323 | if (*buf == '-') { | |
324 | buf = skip_spaces(buf + 1); | |
325 | *end = simple_strtoull(buf, &buf, 0); | |
326 | } else | |
327 | *end = *start; | |
328 | } | |
329 | } | |
330 | ||
331 | /* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */ | |
332 | ||
333 | return buf; | |
334 | } | |
335 | ||
2df43901 GKH |
336 | static ssize_t resources_store(struct device *dmdev, |
337 | struct device_attribute *attr, const char *ubuf, | |
338 | size_t count) | |
1da177e4 LT |
339 | { |
340 | struct pnp_dev *dev = to_pnp_dev(dmdev); | |
9dd78466 BH |
341 | char *buf = (void *)ubuf; |
342 | int retval = 0; | |
1da177e4 LT |
343 | |
344 | if (dev->status & PNP_ATTACHED) { | |
345 | retval = -EBUSY; | |
a05d0781 | 346 | dev_info(&dev->dev, "in use; can't configure\n"); |
1da177e4 LT |
347 | goto done; |
348 | } | |
349 | ||
e7d2860b | 350 | buf = skip_spaces(buf); |
7fb1cab4 | 351 | if (!strncasecmp(buf, "disable", 7)) { |
1da177e4 LT |
352 | retval = pnp_disable_dev(dev); |
353 | goto done; | |
354 | } | |
7fb1cab4 | 355 | if (!strncasecmp(buf, "activate", 8)) { |
1da177e4 LT |
356 | retval = pnp_activate_dev(dev); |
357 | goto done; | |
358 | } | |
7fb1cab4 | 359 | if (!strncasecmp(buf, "fill", 4)) { |
1da177e4 LT |
360 | if (dev->active) |
361 | goto done; | |
362 | retval = pnp_auto_config_dev(dev); | |
363 | goto done; | |
364 | } | |
7fb1cab4 | 365 | if (!strncasecmp(buf, "auto", 4)) { |
1da177e4 LT |
366 | if (dev->active) |
367 | goto done; | |
f4490002 | 368 | pnp_init_resources(dev); |
1da177e4 LT |
369 | retval = pnp_auto_config_dev(dev); |
370 | goto done; | |
371 | } | |
7fb1cab4 | 372 | if (!strncasecmp(buf, "clear", 5)) { |
1da177e4 LT |
373 | if (dev->active) |
374 | goto done; | |
f4490002 | 375 | pnp_init_resources(dev); |
1da177e4 LT |
376 | goto done; |
377 | } | |
7fb1cab4 | 378 | if (!strncasecmp(buf, "get", 3)) { |
b3bd86e2 | 379 | mutex_lock(&pnp_res_mutex); |
1da177e4 | 380 | if (pnp_can_read(dev)) |
59284cb4 | 381 | dev->protocol->get(dev); |
b3bd86e2 | 382 | mutex_unlock(&pnp_res_mutex); |
1da177e4 LT |
383 | goto done; |
384 | } | |
7fb1cab4 | 385 | if (!strncasecmp(buf, "set", 3)) { |
c9377667 WS |
386 | resource_size_t start; |
387 | resource_size_t end; | |
388 | unsigned long flags; | |
389 | ||
1da177e4 LT |
390 | if (dev->active) |
391 | goto done; | |
392 | buf += 3; | |
f4490002 | 393 | pnp_init_resources(dev); |
b3bd86e2 | 394 | mutex_lock(&pnp_res_mutex); |
1da177e4 | 395 | while (1) { |
e7d2860b | 396 | buf = skip_spaces(buf); |
7fb1cab4 | 397 | if (!strncasecmp(buf, "io", 2)) { |
c9377667 WS |
398 | buf = pnp_get_resource_value(buf + 2, |
399 | IORESOURCE_IO, | |
400 | &start, &end, | |
401 | &flags); | |
402 | pnp_add_io_resource(dev, start, end, flags); | |
7fb1cab4 | 403 | } else if (!strncasecmp(buf, "mem", 3)) { |
c9377667 WS |
404 | buf = pnp_get_resource_value(buf + 3, |
405 | IORESOURCE_MEM, | |
406 | &start, &end, | |
407 | &flags); | |
408 | pnp_add_mem_resource(dev, start, end, flags); | |
7fb1cab4 | 409 | } else if (!strncasecmp(buf, "irq", 3)) { |
c9377667 WS |
410 | buf = pnp_get_resource_value(buf + 3, |
411 | IORESOURCE_IRQ, | |
412 | &start, NULL, | |
413 | &flags); | |
414 | pnp_add_irq_resource(dev, start, flags); | |
7fb1cab4 | 415 | } else if (!strncasecmp(buf, "dma", 3)) { |
c9377667 WS |
416 | buf = pnp_get_resource_value(buf + 3, |
417 | IORESOURCE_DMA, | |
418 | &start, NULL, | |
419 | &flags); | |
420 | pnp_add_dma_resource(dev, start, flags); | |
7fb1cab4 | 421 | } else if (!strncasecmp(buf, "bus", 3)) { |
c9377667 WS |
422 | buf = pnp_get_resource_value(buf + 3, |
423 | IORESOURCE_BUS, | |
424 | &start, &end, | |
425 | NULL); | |
426 | pnp_add_bus_resource(dev, start, end); | |
427 | } else | |
428 | break; | |
1da177e4 | 429 | } |
b3bd86e2 | 430 | mutex_unlock(&pnp_res_mutex); |
1da177e4 LT |
431 | goto done; |
432 | } | |
1e0aa9ad BH |
433 | |
434 | done: | |
1da177e4 LT |
435 | if (retval < 0) |
436 | return retval; | |
437 | return count; | |
438 | } | |
2df43901 | 439 | static DEVICE_ATTR_RW(resources); |
1da177e4 | 440 | |
2df43901 GKH |
441 | static ssize_t id_show(struct device *dmdev, struct device_attribute *attr, |
442 | char *buf) | |
1da177e4 LT |
443 | { |
444 | char *str = buf; | |
445 | struct pnp_dev *dev = to_pnp_dev(dmdev); | |
9dd78466 | 446 | struct pnp_id *pos = dev->id; |
1da177e4 LT |
447 | |
448 | while (pos) { | |
9dd78466 | 449 | str += sprintf(str, "%s\n", pos->id); |
1da177e4 LT |
450 | pos = pos->next; |
451 | } | |
452 | return (str - buf); | |
453 | } | |
2df43901 | 454 | static DEVICE_ATTR_RO(id); |
1da177e4 | 455 | |
2df43901 GKH |
456 | static struct attribute *pnp_dev_attrs[] = { |
457 | &dev_attr_resources.attr, | |
458 | &dev_attr_options.attr, | |
459 | &dev_attr_id.attr, | |
460 | NULL, | |
461 | }; | |
462 | ||
463 | static const struct attribute_group pnp_dev_group = { | |
464 | .attrs = pnp_dev_attrs, | |
465 | }; | |
466 | ||
467 | const struct attribute_group *pnp_dev_groups[] = { | |
468 | &pnp_dev_group, | |
469 | NULL, | |
8a89efd1 | 470 | }; |