[media] media: coda: Fix DT driver data pointer for i.MX27
[linux/fpc-iii.git] / drivers / pnp / interface.c
blob0c201317284b40e93014d0a574b3ef0ab9d81b9b
1 /*
2 * interface.c - contains everything related to the user interface
4 * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
5 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
6 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
7 * Bjorn Helgaas <bjorn.helgaas@hp.com>
8 */
10 #include <linux/pnp.h>
11 #include <linux/string.h>
12 #include <linux/errno.h>
13 #include <linux/list.h>
14 #include <linux/types.h>
15 #include <linux/stat.h>
16 #include <linux/ctype.h>
17 #include <linux/slab.h>
18 #include <linux/mutex.h>
20 #include <asm/uaccess.h>
22 #include "base.h"
24 struct pnp_info_buffer {
25 char *buffer; /* pointer to begin of buffer */
26 char *curr; /* current position in buffer */
27 unsigned long size; /* current size */
28 unsigned long len; /* total length of buffer */
29 int stop; /* stop flag */
30 int error; /* error code */
33 typedef struct pnp_info_buffer pnp_info_buffer_t;
35 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
37 va_list args;
38 int res;
40 if (buffer->stop || buffer->error)
41 return 0;
42 va_start(args, fmt);
43 res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
44 va_end(args);
45 if (buffer->size + res >= buffer->len) {
46 buffer->stop = 1;
47 return 0;
49 buffer->curr += res;
50 buffer->size += res;
51 return res;
54 static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
55 struct pnp_port *port)
57 pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
58 "%i-bit address decoding\n", space,
59 (unsigned long long) port->min,
60 (unsigned long long) port->max,
61 port->align ? ((unsigned long long) port->align - 1) : 0,
62 (unsigned long long) port->size,
63 port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
66 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
67 struct pnp_irq *irq)
69 int first = 1, i;
71 pnp_printf(buffer, "%sirq ", space);
72 for (i = 0; i < PNP_IRQ_NR; i++)
73 if (test_bit(i, irq->map.bits)) {
74 if (!first) {
75 pnp_printf(buffer, ",");
76 } else {
77 first = 0;
79 if (i == 2 || i == 9)
80 pnp_printf(buffer, "2/9");
81 else
82 pnp_printf(buffer, "%i", i);
84 if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
85 pnp_printf(buffer, "<none>");
86 if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
87 pnp_printf(buffer, " High-Edge");
88 if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
89 pnp_printf(buffer, " Low-Edge");
90 if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
91 pnp_printf(buffer, " High-Level");
92 if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
93 pnp_printf(buffer, " Low-Level");
94 if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
95 pnp_printf(buffer, " (optional)");
96 pnp_printf(buffer, "\n");
99 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
100 struct pnp_dma *dma)
102 int first = 1, i;
103 char *s;
105 pnp_printf(buffer, "%sdma ", space);
106 for (i = 0; i < 8; i++)
107 if (dma->map & (1 << i)) {
108 if (!first) {
109 pnp_printf(buffer, ",");
110 } else {
111 first = 0;
113 pnp_printf(buffer, "%i", i);
115 if (!dma->map)
116 pnp_printf(buffer, "<none>");
117 switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
118 case IORESOURCE_DMA_8BIT:
119 s = "8-bit";
120 break;
121 case IORESOURCE_DMA_8AND16BIT:
122 s = "8-bit&16-bit";
123 break;
124 default:
125 s = "16-bit";
127 pnp_printf(buffer, " %s", s);
128 if (dma->flags & IORESOURCE_DMA_MASTER)
129 pnp_printf(buffer, " master");
130 if (dma->flags & IORESOURCE_DMA_BYTE)
131 pnp_printf(buffer, " byte-count");
132 if (dma->flags & IORESOURCE_DMA_WORD)
133 pnp_printf(buffer, " word-count");
134 switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
135 case IORESOURCE_DMA_TYPEA:
136 s = "type-A";
137 break;
138 case IORESOURCE_DMA_TYPEB:
139 s = "type-B";
140 break;
141 case IORESOURCE_DMA_TYPEF:
142 s = "type-F";
143 break;
144 default:
145 s = "compatible";
146 break;
148 pnp_printf(buffer, " %s\n", s);
151 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
152 struct pnp_mem *mem)
154 char *s;
156 pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
157 space, (unsigned long long) mem->min,
158 (unsigned long long) mem->max,
159 (unsigned long long) mem->align,
160 (unsigned long long) mem->size);
161 if (mem->flags & IORESOURCE_MEM_WRITEABLE)
162 pnp_printf(buffer, ", writeable");
163 if (mem->flags & IORESOURCE_MEM_CACHEABLE)
164 pnp_printf(buffer, ", cacheable");
165 if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
166 pnp_printf(buffer, ", range-length");
167 if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
168 pnp_printf(buffer, ", shadowable");
169 if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
170 pnp_printf(buffer, ", expansion ROM");
171 switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
172 case IORESOURCE_MEM_8BIT:
173 s = "8-bit";
174 break;
175 case IORESOURCE_MEM_8AND16BIT:
176 s = "8-bit&16-bit";
177 break;
178 case IORESOURCE_MEM_32BIT:
179 s = "32-bit";
180 break;
181 default:
182 s = "16-bit";
184 pnp_printf(buffer, ", %s\n", s);
187 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
188 struct pnp_option *option)
190 switch (option->type) {
191 case IORESOURCE_IO:
192 pnp_print_port(buffer, space, &option->u.port);
193 break;
194 case IORESOURCE_MEM:
195 pnp_print_mem(buffer, space, &option->u.mem);
196 break;
197 case IORESOURCE_IRQ:
198 pnp_print_irq(buffer, space, &option->u.irq);
199 break;
200 case IORESOURCE_DMA:
201 pnp_print_dma(buffer, space, &option->u.dma);
202 break;
206 static ssize_t pnp_show_options(struct device *dmdev,
207 struct device_attribute *attr, char *buf)
209 struct pnp_dev *dev = to_pnp_dev(dmdev);
210 pnp_info_buffer_t *buffer;
211 struct pnp_option *option;
212 int ret, dep = 0, set = 0;
213 char *indent;
215 buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
216 if (!buffer)
217 return -ENOMEM;
219 buffer->len = PAGE_SIZE;
220 buffer->buffer = buf;
221 buffer->curr = buffer->buffer;
223 list_for_each_entry(option, &dev->options, list) {
224 if (pnp_option_is_dependent(option)) {
225 indent = " ";
226 if (!dep || pnp_option_set(option) != set) {
227 set = pnp_option_set(option);
228 dep = 1;
229 pnp_printf(buffer, "Dependent: %02i - "
230 "Priority %s\n", set,
231 pnp_option_priority_name(option));
233 } else {
234 dep = 0;
235 indent = "";
237 pnp_print_option(buffer, indent, option);
240 ret = (buffer->curr - buf);
241 kfree(buffer);
242 return ret;
245 static ssize_t pnp_show_current_resources(struct device *dmdev,
246 struct device_attribute *attr,
247 char *buf)
249 struct pnp_dev *dev = to_pnp_dev(dmdev);
250 pnp_info_buffer_t *buffer;
251 struct pnp_resource *pnp_res;
252 struct resource *res;
253 int ret;
255 if (!dev)
256 return -EINVAL;
258 buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
259 if (!buffer)
260 return -ENOMEM;
262 buffer->len = PAGE_SIZE;
263 buffer->buffer = buf;
264 buffer->curr = buffer->buffer;
266 pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
268 list_for_each_entry(pnp_res, &dev->resources, list) {
269 res = &pnp_res->res;
271 pnp_printf(buffer, pnp_resource_type_name(res));
273 if (res->flags & IORESOURCE_DISABLED) {
274 pnp_printf(buffer, " disabled\n");
275 continue;
278 switch (pnp_resource_type(res)) {
279 case IORESOURCE_IO:
280 case IORESOURCE_MEM:
281 case IORESOURCE_BUS:
282 pnp_printf(buffer, " %#llx-%#llx%s\n",
283 (unsigned long long) res->start,
284 (unsigned long long) res->end,
285 res->flags & IORESOURCE_WINDOW ?
286 " window" : "");
287 break;
288 case IORESOURCE_IRQ:
289 case IORESOURCE_DMA:
290 pnp_printf(buffer, " %lld\n",
291 (unsigned long long) res->start);
292 break;
296 ret = (buffer->curr - buf);
297 kfree(buffer);
298 return ret;
301 static char *pnp_get_resource_value(char *buf,
302 unsigned long type,
303 resource_size_t *start,
304 resource_size_t *end,
305 unsigned long *flags)
307 if (start)
308 *start = 0;
309 if (end)
310 *end = 0;
311 if (flags)
312 *flags = 0;
314 /* TBD: allow for disabled resources */
316 buf = skip_spaces(buf);
317 if (start) {
318 *start = simple_strtoull(buf, &buf, 0);
319 if (end) {
320 buf = skip_spaces(buf);
321 if (*buf == '-') {
322 buf = skip_spaces(buf + 1);
323 *end = simple_strtoull(buf, &buf, 0);
324 } else
325 *end = *start;
329 /* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */
331 return buf;
334 static ssize_t pnp_set_current_resources(struct device *dmdev,
335 struct device_attribute *attr,
336 const char *ubuf, size_t count)
338 struct pnp_dev *dev = to_pnp_dev(dmdev);
339 char *buf = (void *)ubuf;
340 int retval = 0;
342 if (dev->status & PNP_ATTACHED) {
343 retval = -EBUSY;
344 dev_info(&dev->dev, "in use; can't configure\n");
345 goto done;
348 buf = skip_spaces(buf);
349 if (!strnicmp(buf, "disable", 7)) {
350 retval = pnp_disable_dev(dev);
351 goto done;
353 if (!strnicmp(buf, "activate", 8)) {
354 retval = pnp_activate_dev(dev);
355 goto done;
357 if (!strnicmp(buf, "fill", 4)) {
358 if (dev->active)
359 goto done;
360 retval = pnp_auto_config_dev(dev);
361 goto done;
363 if (!strnicmp(buf, "auto", 4)) {
364 if (dev->active)
365 goto done;
366 pnp_init_resources(dev);
367 retval = pnp_auto_config_dev(dev);
368 goto done;
370 if (!strnicmp(buf, "clear", 5)) {
371 if (dev->active)
372 goto done;
373 pnp_init_resources(dev);
374 goto done;
376 if (!strnicmp(buf, "get", 3)) {
377 mutex_lock(&pnp_res_mutex);
378 if (pnp_can_read(dev))
379 dev->protocol->get(dev);
380 mutex_unlock(&pnp_res_mutex);
381 goto done;
383 if (!strnicmp(buf, "set", 3)) {
384 resource_size_t start;
385 resource_size_t end;
386 unsigned long flags;
388 if (dev->active)
389 goto done;
390 buf += 3;
391 pnp_init_resources(dev);
392 mutex_lock(&pnp_res_mutex);
393 while (1) {
394 buf = skip_spaces(buf);
395 if (!strnicmp(buf, "io", 2)) {
396 buf = pnp_get_resource_value(buf + 2,
397 IORESOURCE_IO,
398 &start, &end,
399 &flags);
400 pnp_add_io_resource(dev, start, end, flags);
401 } else if (!strnicmp(buf, "mem", 3)) {
402 buf = pnp_get_resource_value(buf + 3,
403 IORESOURCE_MEM,
404 &start, &end,
405 &flags);
406 pnp_add_mem_resource(dev, start, end, flags);
407 } else if (!strnicmp(buf, "irq", 3)) {
408 buf = pnp_get_resource_value(buf + 3,
409 IORESOURCE_IRQ,
410 &start, NULL,
411 &flags);
412 pnp_add_irq_resource(dev, start, flags);
413 } else if (!strnicmp(buf, "dma", 3)) {
414 buf = pnp_get_resource_value(buf + 3,
415 IORESOURCE_DMA,
416 &start, NULL,
417 &flags);
418 pnp_add_dma_resource(dev, start, flags);
419 } else if (!strnicmp(buf, "bus", 3)) {
420 buf = pnp_get_resource_value(buf + 3,
421 IORESOURCE_BUS,
422 &start, &end,
423 NULL);
424 pnp_add_bus_resource(dev, start, end);
425 } else
426 break;
428 mutex_unlock(&pnp_res_mutex);
429 goto done;
432 done:
433 if (retval < 0)
434 return retval;
435 return count;
438 static ssize_t pnp_show_current_ids(struct device *dmdev,
439 struct device_attribute *attr, char *buf)
441 char *str = buf;
442 struct pnp_dev *dev = to_pnp_dev(dmdev);
443 struct pnp_id *pos = dev->id;
445 while (pos) {
446 str += sprintf(str, "%s\n", pos->id);
447 pos = pos->next;
449 return (str - buf);
452 struct device_attribute pnp_interface_attrs[] = {
453 __ATTR(resources, S_IRUGO | S_IWUSR,
454 pnp_show_current_resources,
455 pnp_set_current_resources),
456 __ATTR(options, S_IRUGO, pnp_show_options, NULL),
457 __ATTR(id, S_IRUGO, pnp_show_current_ids, NULL),
458 __ATTR_NULL,