1 /*
2 * interface.c - contains everything related to the user interface
3 *
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 */
9
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>
19
20 #include <asm/uaccess.h>
21
22 #include "base.h"
23
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 */
31 };
32
33 typedef struct pnp_info_buffer pnp_info_buffer_t;
34
pnp_printf(pnp_info_buffer_t * buffer,char * fmt,...)35 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
36 {
37 va_list args;
38 int res;
39
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;
48 }
49 buffer->curr += res;
50 buffer->size += res;
51 return res;
52 }
53
pnp_print_port(pnp_info_buffer_t * buffer,char * space,struct pnp_port * port)54 static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
55 struct pnp_port *port)
56 {
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);
64 }
65
pnp_print_irq(pnp_info_buffer_t * buffer,char * space,struct pnp_irq * irq)66 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
67 struct pnp_irq *irq)
68 {
69 int first = 1, i;
70
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;
78 }
79 if (i == 2 || i == 9)
80 pnp_printf(buffer, "2/9");
81 else
82 pnp_printf(buffer, "%i", i);
83 }
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");
97 }
98
pnp_print_dma(pnp_info_buffer_t * buffer,char * space,struct pnp_dma * dma)99 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
100 struct pnp_dma *dma)
101 {
102 int first = 1, i;
103 char *s;
104
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;
112 }
113 pnp_printf(buffer, "%i", i);
114 }
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";
126 }
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;
147 }
148 pnp_printf(buffer, " %s\n", s);
149 }
150
pnp_print_mem(pnp_info_buffer_t * buffer,char * space,struct pnp_mem * mem)151 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
152 struct pnp_mem *mem)
153 {
154 char *s;
155
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";
183 }
184 pnp_printf(buffer, ", %s\n", s);
185 }
186
pnp_print_option(pnp_info_buffer_t * buffer,char * space,struct pnp_option * option)187 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
188 struct pnp_option *option)
189 {
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;
203 }
204 }
205
pnp_show_options(struct device * dmdev,struct device_attribute * attr,char * buf)206 static ssize_t pnp_show_options(struct device *dmdev,
207 struct device_attribute *attr, char *buf)
208 {
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;
214
215 buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
216 if (!buffer)
217 return -ENOMEM;
218
219 buffer->len = PAGE_SIZE;
220 buffer->buffer = buf;
221 buffer->curr = buffer->buffer;
222
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));
232 }
233 } else {
234 dep = 0;
235 indent = "";
236 }
237 pnp_print_option(buffer, indent, option);
238 }
239
240 ret = (buffer->curr - buf);
241 kfree(buffer);
242 return ret;
243 }
244
pnp_show_current_resources(struct device * dmdev,struct device_attribute * attr,char * buf)245 static ssize_t pnp_show_current_resources(struct device *dmdev,
246 struct device_attribute *attr,
247 char *buf)
248 {
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;
254
255 if (!dev)
256 return -EINVAL;
257
258 buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
259 if (!buffer)
260 return -ENOMEM;
261
262 buffer->len = PAGE_SIZE;
263 buffer->buffer = buf;
264 buffer->curr = buffer->buffer;
265
266 pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
267
268 list_for_each_entry(pnp_res, &dev->resources, list) {
269 res = &pnp_res->res;
270
271 pnp_printf(buffer, pnp_resource_type_name(res));
272
273 if (res->flags & IORESOURCE_DISABLED) {
274 pnp_printf(buffer, " disabled\n");
275 continue;
276 }
277
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;
293 }
294 }
295
296 ret = (buffer->curr - buf);
297 kfree(buffer);
298 return ret;
299 }
300
pnp_set_current_resources(struct device * dmdev,struct device_attribute * attr,const char * ubuf,size_t count)301 static ssize_t pnp_set_current_resources(struct device *dmdev,
302 struct device_attribute *attr,
303 const char *ubuf, size_t count)
304 {
305 struct pnp_dev *dev = to_pnp_dev(dmdev);
306 char *buf = (void *)ubuf;
307 int retval = 0;
308 resource_size_t start, end;
309
310 if (dev->status & PNP_ATTACHED) {
311 retval = -EBUSY;
312 dev_info(&dev->dev, "in use; can't configure\n");
313 goto done;
314 }
315
316 buf = skip_spaces(buf);
317 if (!strnicmp(buf, "disable", 7)) {
318 retval = pnp_disable_dev(dev);
319 goto done;
320 }
321 if (!strnicmp(buf, "activate", 8)) {
322 retval = pnp_activate_dev(dev);
323 goto done;
324 }
325 if (!strnicmp(buf, "fill", 4)) {
326 if (dev->active)
327 goto done;
328 retval = pnp_auto_config_dev(dev);
329 goto done;
330 }
331 if (!strnicmp(buf, "auto", 4)) {
332 if (dev->active)
333 goto done;
334 pnp_init_resources(dev);
335 retval = pnp_auto_config_dev(dev);
336 goto done;
337 }
338 if (!strnicmp(buf, "clear", 5)) {
339 if (dev->active)
340 goto done;
341 pnp_init_resources(dev);
342 goto done;
343 }
344 if (!strnicmp(buf, "get", 3)) {
345 mutex_lock(&pnp_res_mutex);
346 if (pnp_can_read(dev))
347 dev->protocol->get(dev);
348 mutex_unlock(&pnp_res_mutex);
349 goto done;
350 }
351 if (!strnicmp(buf, "set", 3)) {
352 if (dev->active)
353 goto done;
354 buf += 3;
355 pnp_init_resources(dev);
356 mutex_lock(&pnp_res_mutex);
357 while (1) {
358 buf = skip_spaces(buf);
359 if (!strnicmp(buf, "io", 2)) {
360 buf = skip_spaces(buf + 2);
361 start = simple_strtoul(buf, &buf, 0);
362 buf = skip_spaces(buf);
363 if (*buf == '-') {
364 buf = skip_spaces(buf + 1);
365 end = simple_strtoul(buf, &buf, 0);
366 } else
367 end = start;
368 pnp_add_io_resource(dev, start, end, 0);
369 continue;
370 }
371 if (!strnicmp(buf, "mem", 3)) {
372 buf = skip_spaces(buf + 3);
373 start = simple_strtoul(buf, &buf, 0);
374 buf = skip_spaces(buf);
375 if (*buf == '-') {
376 buf = skip_spaces(buf + 1);
377 end = simple_strtoul(buf, &buf, 0);
378 } else
379 end = start;
380 pnp_add_mem_resource(dev, start, end, 0);
381 continue;
382 }
383 if (!strnicmp(buf, "irq", 3)) {
384 buf = skip_spaces(buf + 3);
385 start = simple_strtoul(buf, &buf, 0);
386 pnp_add_irq_resource(dev, start, 0);
387 continue;
388 }
389 if (!strnicmp(buf, "dma", 3)) {
390 buf = skip_spaces(buf + 3);
391 start = simple_strtoul(buf, &buf, 0);
392 pnp_add_dma_resource(dev, start, 0);
393 continue;
394 }
395 break;
396 }
397 mutex_unlock(&pnp_res_mutex);
398 goto done;
399 }
400
401 done:
402 if (retval < 0)
403 return retval;
404 return count;
405 }
406
pnp_show_current_ids(struct device * dmdev,struct device_attribute * attr,char * buf)407 static ssize_t pnp_show_current_ids(struct device *dmdev,
408 struct device_attribute *attr, char *buf)
409 {
410 char *str = buf;
411 struct pnp_dev *dev = to_pnp_dev(dmdev);
412 struct pnp_id *pos = dev->id;
413
414 while (pos) {
415 str += sprintf(str, "%s\n", pos->id);
416 pos = pos->next;
417 }
418 return (str - buf);
419 }
420
421 struct device_attribute pnp_interface_attrs[] = {
422 __ATTR(resources, S_IRUGO | S_IWUSR,
423 pnp_show_current_resources,
424 pnp_set_current_resources),
425 __ATTR(options, S_IRUGO, pnp_show_options, NULL),
426 __ATTR(id, S_IRUGO, pnp_show_current_ids, NULL),
427 __ATTR_NULL,
428 };
429