summaryrefslogtreecommitdiffstats
path: root/drivers/pnp/interface.c
blob: ead151242a643c45d65dff9f87e4bae741aac085 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
/*
 * interface.c - contains everything related to the user interface
 *
 * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
 */

#include <linux/pnp.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/pnp.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/mutex.h>

#include <asm/uaccess.h>

#include "base.h"

struct pnp_info_buffer {
	char *buffer;		/* pointer to begin of buffer */
	char *curr;		/* current position in buffer */
	unsigned long size;	/* current size */
	unsigned long len;	/* total length of buffer */
	int stop;		/* stop flag */
	int error;		/* error code */
};

typedef struct pnp_info_buffer pnp_info_buffer_t;

static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
{
	va_list args;
	int res;

	if (buffer->stop || buffer->error)
		return 0;
	va_start(args, fmt);
	res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
	va_end(args);
	if (buffer->size + res >= buffer->len) {
		buffer->stop = 1;
		return 0;
	}
	buffer->curr += res;
	buffer->size += res;
	return res;
}

static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
			   struct pnp_port *port)
{
	pnp_printf(buffer,
		   "%sport 0x%x-0x%x, align 0x%x, size 0x%x, %i-bit address decoding\n",
		   space, port->min, port->max,
		   port->align ? (port->align - 1) : 0, port->size,
		   port->flags & PNP_PORT_FLAG_16BITADDR ? 16 : 10);
}

static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
			  struct pnp_irq *irq)
{
	int first = 1, i;

	pnp_printf(buffer, "%sirq ", space);
	for (i = 0; i < PNP_IRQ_NR; i++)
		if (test_bit(i, irq->map)) {
			if (!first) {
				pnp_printf(buffer, ",");
			} else {
				first = 0;
			}
			if (i == 2 || i == 9)
				pnp_printf(buffer, "2/9");
			else
				pnp_printf(buffer, "%i", i);
		}
	if (bitmap_empty(irq->map, PNP_IRQ_NR))
		pnp_printf(buffer, "<none>");
	if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
		pnp_printf(buffer, " High-Edge");
	if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
		pnp_printf(buffer, " Low-Edge");
	if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
		pnp_printf(buffer, " High-Level");
	if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
		pnp_printf(buffer, " Low-Level");
	pnp_printf(buffer, "\n");
}

static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
			  struct pnp_dma *dma)
{
	int first = 1, i;
	char *s;

	pnp_printf(buffer, "%sdma ", space);
	for (i = 0; i < 8; i++)
		if (dma->map & (1 << i)) {
			if (!first) {
				pnp_printf(buffer, ",");
			} else {
				first = 0;
			}
			pnp_printf(buffer, "%i", i);
		}
	if (!dma->map)
		pnp_printf(buffer, "<none>");
	switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
	case IORESOURCE_DMA_8BIT:
		s = "8-bit";
		break;
	case IORESOURCE_DMA_8AND16BIT:
		s = "8-bit&16-bit";
		break;
	default:
		s = "16-bit";
	}
	pnp_printf(buffer, " %s", s);
	if (dma->flags & IORESOURCE_DMA_MASTER)
		pnp_printf(buffer, " master");
	if (dma->flags & IORESOURCE_DMA_BYTE)
		pnp_printf(buffer, " byte-count");
	if (dma->flags & IORESOURCE_DMA_WORD)
		pnp_printf(buffer, " word-count");
	switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
	case IORESOURCE_DMA_TYPEA:
		s = "type-A";
		break;
	case IORESOURCE_DMA_TYPEB:
		s = "type-B";
		break;
	case IORESOURCE_DMA_TYPEF:
		s = "type-F";
		break;
	default:
		s = "compatible";
		break;
	}
	pnp_printf(buffer, " %s\n", s);
}

static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
			  struct pnp_mem *mem)
{
	char *s;

	pnp_printf(buffer, "%sMemory 0x%x-0x%x, align 0x%x, size 0x%x",
		   space, mem->min, mem->max, mem->align, mem->size);
	if (mem->flags & IORESOURCE_MEM_WRITEABLE)
		pnp_printf(buffer, ", writeable");
	if (mem->flags & IORESOURCE_MEM_CACHEABLE)
		pnp_printf(buffer, ", cacheable");
	if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
		pnp_printf(buffer, ", range-length");
	if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
		pnp_printf(buffer, ", shadowable");
	if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
		pnp_printf(buffer, ", expansion ROM");
	switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
	case IORESOURCE_MEM_8BIT:
		s = "8-bit";
		break;
	case IORESOURCE_MEM_8AND16BIT:
		s = "8-bit&16-bit";
		break;
	case IORESOURCE_MEM_32BIT:
		s = "32-bit";
		break;
	default:
		s = "16-bit";
	}
	pnp_printf(buffer, ", %s\n", s);
}

static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
			     struct pnp_option *option, int dep)
{
	char *s;
	struct pnp_port *port;
	struct pnp_irq *irq;
	struct pnp_dma *dma;
	struct pnp_mem *mem;

	if (dep) {
		switch (option->priority) {
		case PNP_RES_PRIORITY_PREFERRED:
			s = "preferred";
			break;
		case PNP_RES_PRIORITY_ACCEPTABLE:
			s = "acceptable";
			break;
		case PNP_RES_PRIORITY_FUNCTIONAL:
			s = "functional";
			break;
		default:
			s = "invalid";
		}
		pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
	}

	for (port = option->port; port; port = port->next)
		pnp_print_port(buffer, space, port);
	for (irq = option->irq; irq; irq = irq->next)
		pnp_print_irq(buffer, space, irq);
	for (dma = option->dma; dma; dma = dma->next)
		pnp_print_dma(buffer, space, dma);
	for (mem = option->mem; mem; mem = mem->next)
		pnp_print_mem(buffer, space, mem);
}

static ssize_t pnp_show_options(struct device *dmdev,
				struct device_attribute *attr, char *buf)
{
	struct pnp_dev *dev = to_pnp_dev(dmdev);
	struct pnp_option *independent = dev->independent;
	struct pnp_option *dependent = dev->dependent;
	int ret, dep = 1;

	pnp_info_buffer_t *buffer = (pnp_info_buffer_t *)
	    pnp_alloc(sizeof(pnp_info_buffer_t));
	if (!buffer)
		return -ENOMEM;

	buffer->len = PAGE_SIZE;
	buffer->buffer = buf;
	buffer->curr = buffer->buffer;
	if (independent)
		pnp_print_option(buffer, "", independent, 0);

	while (dependent) {
		pnp_print_option(buffer, "   ", dependent, dep);
		dependent = dependent->next;
		dep++;
	}
	ret = (buffer->curr - buf);
	kfree(buffer);
	return ret;
}

static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);

static ssize_t pnp_show_current_resources(struct device *dmdev,
					  struct device_attribute *attr,
					  char *buf)
{
	struct pnp_dev *dev = to_pnp_dev(dmdev);
	struct resource *res;
	int i, ret;
	pnp_info_buffer_t *buffer;

	if (!dev)
		return -EINVAL;

	buffer = (pnp_info_buffer_t *) pnp_alloc(sizeof(pnp_info_buffer_t));
	if (!buffer)
		return -ENOMEM;
	buffer->len = PAGE_SIZE;
	buffer->buffer = buf;
	buffer->curr = buffer->buffer;

	pnp_printf(buffer, "state = ");
	if (dev->active)
		pnp_printf(buffer, "active\n");
	else
		pnp_printf(buffer, "disabled\n");

	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
		if (pnp_resource_valid(res)) {
			pnp_printf(buffer, "io");
			if (res->flags & IORESOURCE_DISABLED)
				pnp_printf(buffer, " disabled\n");
			else
				pnp_printf(buffer, " 0x%llx-0x%llx\n",
					   (unsigned long long) res->start,
					   (unsigned long long) res->end);
		}
	}
	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
		if (pnp_resource_valid(res)) {
			pnp_printf(buffer, "mem");
			if (res->flags & IORESOURCE_DISABLED)
				pnp_printf(buffer, " disabled\n");
			else
				pnp_printf(buffer, " 0x%llx-0x%llx\n",
					   (unsigned long long) res->start,
					   (unsigned long long) res->end);
		}
	}
	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
		if (pnp_resource_valid(res)) {
			pnp_printf(buffer, "irq");
			if (res->flags & IORESOURCE_DISABLED)
				pnp_printf(buffer, " disabled\n");
			else
				pnp_printf(buffer, " %lld\n",
					   (unsigned long long) res->start);
		}
	}
	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
		if (pnp_resource_valid(res)) {
			pnp_printf(buffer, "dma");
			if (res->flags & IORESOURCE_DISABLED)
				pnp_printf(buffer, " disabled\n");
			else
				pnp_printf(buffer, " %lld\n",
					   (unsigned long long) res->start);
		}
	}
	ret = (buffer->curr - buf);
	kfree(buffer);
	return ret;
}

static ssize_t
pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
			  const char *ubuf, size_t count)
{
	struct pnp_dev *dev = to_pnp_dev(dmdev);
	struct pnp_resource *pnp_res;
	struct resource *res;
	char *buf = (void *)ubuf;
	int retval = 0;

	if (dev->status & PNP_ATTACHED) {
		retval = -EBUSY;
		dev_info(&dev->dev, "in use; can't configure\n");
		goto done;
	}

	while (isspace(*buf))
		++buf;
	if (!strnicmp(buf, "disable", 7)) {
		retval = pnp_disable_dev(dev);
		goto done;
	}
	if (!strnicmp(buf, "activate", 8)) {
		retval = pnp_activate_dev(dev);
		goto done;
	}
	if (!strnicmp(buf, "fill", 4)) {
		if (dev->active)
			goto done;
		retval = pnp_auto_config_dev(dev);
		goto done;
	}
	if (!strnicmp(buf, "auto", 4)) {
		if (dev->active)
			goto done;
		pnp_init_resources(dev);
		retval = pnp_auto_config_dev(dev);
		goto done;
	}
	if (!strnicmp(buf, "clear", 5)) {
		if (dev->active)
			goto done;
		pnp_init_resources(dev);
		goto done;
	}
	if (!strnicmp(buf, "get", 3)) {
		mutex_lock(&pnp_res_mutex);
		if (pnp_can_read(dev))
			dev->protocol->get(dev);
		mutex_unlock(&pnp_res_mutex);
		goto done;
	}
	if (!strnicmp(buf, "set", 3)) {
		int nport = 0, nmem = 0, nirq = 0, ndma = 0;
		if (dev->active)
			goto done;
		buf += 3;
		pnp_init_resources(dev);
		mutex_lock(&pnp_res_mutex);
		while (1) {
			while (isspace(*buf))
				++buf;
			if (!strnicmp(buf, "io", 2)) {
				buf += 2;
				while (isspace(*buf))
					++buf;
				pnp_res = pnp_get_pnp_resource(dev,
						IORESOURCE_IO, nport);
				if (!pnp_res)
					break;
				pnp_res->index = nport;
				res = &pnp_res->res;
				res->start = simple_strtoul(buf, &buf, 0);
				while (isspace(*buf))
					++buf;
				if (*buf == '-') {
					buf += 1;
					while (isspace(*buf))
						++buf;
					res->end = simple_strtoul(buf, &buf, 0);
				} else
					res->end = res->start;
				res->flags = IORESOURCE_IO;
				nport++;
				continue;
			}
			if (!strnicmp(buf, "mem", 3)) {
				buf += 3;
				while (isspace(*buf))
					++buf;
				pnp_res = pnp_get_pnp_resource(dev,
						IORESOURCE_MEM, nmem);
				if (!pnp_res)
					break;
				pnp_res->index = nmem;
				res = &pnp_res->res;
				res->start = simple_strtoul(buf, &buf, 0);
				while (isspace(*buf))
					++buf;
				if (*buf == '-') {
					buf += 1;
					while (isspace(*buf))
						++buf;
					res->end = simple_strtoul(buf, &buf, 0);
				} else
					res->end = res->start;
				res->flags = IORESOURCE_MEM;
				nmem++;
				continue;
			}
			if (!strnicmp(buf, "irq", 3)) {
				buf += 3;
				while (isspace(*buf))
					++buf;
				pnp_res = pnp_get_pnp_resource(dev,
						IORESOURCE_IRQ, nirq);
				if (!pnp_res)
					break;
				pnp_res->index = nirq;
				res = &pnp_res->res;
				res->start = res->end =
				    simple_strtoul(buf, &buf, 0);
				res->flags = IORESOURCE_IRQ;
				nirq++;
				continue;
			}
			if (!strnicmp(buf, "dma", 3)) {
				buf += 3;
				while (isspace(*buf))
					++buf;
				pnp_res = pnp_get_pnp_resource(dev,
						IORESOURCE_DMA, ndma);
				if (!pnp_res)
					break;
				pnp_res->index = ndma;
				res = &pnp_res->res;
				res->start = res->end =
				    simple_strtoul(buf, &buf, 0);
				res->flags = IORESOURCE_DMA;
				ndma++;
				continue;
			}
			break;
		}
		mutex_unlock(&pnp_res_mutex);
		goto done;
	}

done:
	if (retval < 0)
		return retval;
	return count;
}

static DEVICE_ATTR(resources, S_IRUGO | S_IWUSR,
		   pnp_show_current_resources, pnp_set_current_resources);

static ssize_t pnp_show_current_ids(struct device *dmdev,
				    struct device_attribute *attr, char *buf)
{
	char *str = buf;
	struct pnp_dev *dev = to_pnp_dev(dmdev);
	struct pnp_id *pos = dev->id;

	while (pos) {
		str += sprintf(str, "%s\n", pos->id);
		pos = pos->next;
	}
	return (str - buf);
}

static DEVICE_ATTR(id, S_IRUGO, pnp_show_current_ids, NULL);

int pnp_interface_attach_device(struct pnp_dev *dev)
{
	int rc = device_create_file(&dev->dev, &dev_attr_options);

	if (rc)
		goto err;
	rc = device_create_file(&dev->dev, &dev_attr_resources);
	if (rc)
		goto err_opt;
	rc = device_create_file(&dev->dev, &dev_attr_id);
	if (rc)
		goto err_res;

	return 0;

err_res:
	device_remove_file(&dev->dev, &dev_attr_resources);
err_opt:
	device_remove_file(&dev->dev, &dev_attr_options);
err:
	return rc;
}
OpenPOWER on IntegriCloud