PNP: support optional IRQ resources
[linux-2.6.git] / drivers / pnp / interface.c
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  */
7
8 #include <linux/pnp.h>
9 #include <linux/string.h>
10 #include <linux/errno.h>
11 #include <linux/list.h>
12 #include <linux/types.h>
13 #include <linux/pnp.h>
14 #include <linux/stat.h>
15 #include <linux/ctype.h>
16 #include <linux/slab.h>
17 #include <linux/mutex.h>
18
19 #include <asm/uaccess.h>
20
21 #include "base.h"
22
23 struct pnp_info_buffer {
24         char *buffer;           /* pointer to begin of buffer */
25         char *curr;             /* current position in buffer */
26         unsigned long size;     /* current size */
27         unsigned long len;      /* total length of buffer */
28         int stop;               /* stop flag */
29         int error;              /* error code */
30 };
31
32 typedef struct pnp_info_buffer pnp_info_buffer_t;
33
34 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
35 {
36         va_list args;
37         int res;
38
39         if (buffer->stop || buffer->error)
40                 return 0;
41         va_start(args, fmt);
42         res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
43         va_end(args);
44         if (buffer->size + res >= buffer->len) {
45                 buffer->stop = 1;
46                 return 0;
47         }
48         buffer->curr += res;
49         buffer->size += res;
50         return res;
51 }
52
53 static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
54                            struct pnp_port *port)
55 {
56         pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
57                    "%i-bit address decoding\n", space,
58                    (unsigned long long) port->min,
59                    (unsigned long long) port->max,
60                    port->align ? ((unsigned long long) port->align - 1) : 0,
61                    (unsigned long long) port->size,
62                    port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
63 }
64
65 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
66                           struct pnp_irq *irq)
67 {
68         int first = 1, i;
69
70         pnp_printf(buffer, "%sirq ", space);
71         for (i = 0; i < PNP_IRQ_NR; i++)
72                 if (test_bit(i, irq->map.bits)) {
73                         if (!first) {
74                                 pnp_printf(buffer, ",");
75                         } else {
76                                 first = 0;
77                         }
78                         if (i == 2 || i == 9)
79                                 pnp_printf(buffer, "2/9");
80                         else
81                                 pnp_printf(buffer, "%i", i);
82                 }
83         if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
84                 pnp_printf(buffer, "<none>");
85         if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
86                 pnp_printf(buffer, " High-Edge");
87         if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
88                 pnp_printf(buffer, " Low-Edge");
89         if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
90                 pnp_printf(buffer, " High-Level");
91         if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
92                 pnp_printf(buffer, " Low-Level");
93         if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
94                 pnp_printf(buffer, " (optional)");
95         pnp_printf(buffer, "\n");
96 }
97
98 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
99                           struct pnp_dma *dma)
100 {
101         int first = 1, i;
102         char *s;
103
104         pnp_printf(buffer, "%sdma ", space);
105         for (i = 0; i < 8; i++)
106                 if (dma->map & (1 << i)) {
107                         if (!first) {
108                                 pnp_printf(buffer, ",");
109                         } else {
110                                 first = 0;
111                         }
112                         pnp_printf(buffer, "%i", i);
113                 }
114         if (!dma->map)
115                 pnp_printf(buffer, "<none>");
116         switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
117         case IORESOURCE_DMA_8BIT:
118                 s = "8-bit";
119                 break;
120         case IORESOURCE_DMA_8AND16BIT:
121                 s = "8-bit&16-bit";
122                 break;
123         default:
124                 s = "16-bit";
125         }
126         pnp_printf(buffer, " %s", s);
127         if (dma->flags & IORESOURCE_DMA_MASTER)
128                 pnp_printf(buffer, " master");
129         if (dma->flags & IORESOURCE_DMA_BYTE)
130                 pnp_printf(buffer, " byte-count");
131         if (dma->flags & IORESOURCE_DMA_WORD)
132                 pnp_printf(buffer, " word-count");
133         switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
134         case IORESOURCE_DMA_TYPEA:
135                 s = "type-A";
136                 break;
137         case IORESOURCE_DMA_TYPEB:
138                 s = "type-B";
139                 break;
140         case IORESOURCE_DMA_TYPEF:
141                 s = "type-F";
142                 break;
143         default:
144                 s = "compatible";
145                 break;
146         }
147         pnp_printf(buffer, " %s\n", s);
148 }
149
150 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
151                           struct pnp_mem *mem)
152 {
153         char *s;
154
155         pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
156                    space, (unsigned long long) mem->min,
157                    (unsigned long long) mem->max,
158                    (unsigned long long) mem->align,
159                    (unsigned long long) mem->size);
160         if (mem->flags & IORESOURCE_MEM_WRITEABLE)
161                 pnp_printf(buffer, ", writeable");
162         if (mem->flags & IORESOURCE_MEM_CACHEABLE)
163                 pnp_printf(buffer, ", cacheable");
164         if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
165                 pnp_printf(buffer, ", range-length");
166         if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
167                 pnp_printf(buffer, ", shadowable");
168         if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
169                 pnp_printf(buffer, ", expansion ROM");
170         switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
171         case IORESOURCE_MEM_8BIT:
172                 s = "8-bit";
173                 break;
174         case IORESOURCE_MEM_8AND16BIT:
175                 s = "8-bit&16-bit";
176                 break;
177         case IORESOURCE_MEM_32BIT:
178                 s = "32-bit";
179                 break;
180         default:
181                 s = "16-bit";
182         }
183         pnp_printf(buffer, ", %s\n", s);
184 }
185
186 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
187                              struct pnp_option *option, int dep)
188 {
189         char *s;
190         struct pnp_port *port;
191         struct pnp_irq *irq;
192         struct pnp_dma *dma;
193         struct pnp_mem *mem;
194
195         if (dep) {
196                 switch (option->priority) {
197                 case PNP_RES_PRIORITY_PREFERRED:
198                         s = "preferred";
199                         break;
200                 case PNP_RES_PRIORITY_ACCEPTABLE:
201                         s = "acceptable";
202                         break;
203                 case PNP_RES_PRIORITY_FUNCTIONAL:
204                         s = "functional";
205                         break;
206                 default:
207                         s = "invalid";
208                 }
209                 pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
210         }
211
212         for (port = option->port; port; port = port->next)
213                 pnp_print_port(buffer, space, port);
214         for (irq = option->irq; irq; irq = irq->next)
215                 pnp_print_irq(buffer, space, irq);
216         for (dma = option->dma; dma; dma = dma->next)
217                 pnp_print_dma(buffer, space, dma);
218         for (mem = option->mem; mem; mem = mem->next)
219                 pnp_print_mem(buffer, space, mem);
220 }
221
222 static ssize_t pnp_show_options(struct device *dmdev,
223                                 struct device_attribute *attr, char *buf)
224 {
225         struct pnp_dev *dev = to_pnp_dev(dmdev);
226         pnp_info_buffer_t *buffer;
227         struct pnp_option *independent = dev->independent;
228         struct pnp_option *dependent = dev->dependent;
229         int ret, dep = 1;
230
231         buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
232         if (!buffer)
233                 return -ENOMEM;
234
235         buffer->len = PAGE_SIZE;
236         buffer->buffer = buf;
237         buffer->curr = buffer->buffer;
238         if (independent)
239                 pnp_print_option(buffer, "", independent, 0);
240
241         while (dependent) {
242                 pnp_print_option(buffer, "   ", dependent, dep);
243                 dependent = dependent->next;
244                 dep++;
245         }
246         ret = (buffer->curr - buf);
247         kfree(buffer);
248         return ret;
249 }
250
251 static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);
252
253 static ssize_t pnp_show_current_resources(struct device *dmdev,
254                                           struct device_attribute *attr,
255                                           char *buf)
256 {
257         struct pnp_dev *dev = to_pnp_dev(dmdev);
258         pnp_info_buffer_t *buffer;
259         struct pnp_resource *pnp_res;
260         struct resource *res;
261         int ret;
262
263         if (!dev)
264                 return -EINVAL;
265
266         buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
267         if (!buffer)
268                 return -ENOMEM;
269
270         buffer->len = PAGE_SIZE;
271         buffer->buffer = buf;
272         buffer->curr = buffer->buffer;
273
274         pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
275
276         list_for_each_entry(pnp_res, &dev->resources, list) {
277                 res = &pnp_res->res;
278
279                 pnp_printf(buffer, pnp_resource_type_name(res));
280
281                 if (res->flags & IORESOURCE_DISABLED) {
282                         pnp_printf(buffer, " disabled\n");
283                         continue;
284                 }
285
286                 switch (pnp_resource_type(res)) {
287                 case IORESOURCE_IO:
288                 case IORESOURCE_MEM:
289                         pnp_printf(buffer, " %#llx-%#llx\n",
290                                    (unsigned long long) res->start,
291                                    (unsigned long long) res->end);
292                         break;
293                 case IORESOURCE_IRQ:
294                 case IORESOURCE_DMA:
295                         pnp_printf(buffer, " %lld\n",
296                                    (unsigned long long) res->start);
297                         break;
298                 }
299         }
300
301         ret = (buffer->curr - buf);
302         kfree(buffer);
303         return ret;
304 }
305
306 static ssize_t pnp_set_current_resources(struct device *dmdev,
307                                          struct device_attribute *attr,
308                                          const char *ubuf, size_t count)
309 {
310         struct pnp_dev *dev = to_pnp_dev(dmdev);
311         char *buf = (void *)ubuf;
312         int retval = 0;
313         resource_size_t start, end;
314
315         if (dev->status & PNP_ATTACHED) {
316                 retval = -EBUSY;
317                 dev_info(&dev->dev, "in use; can't configure\n");
318                 goto done;
319         }
320
321         while (isspace(*buf))
322                 ++buf;
323         if (!strnicmp(buf, "disable", 7)) {
324                 retval = pnp_disable_dev(dev);
325                 goto done;
326         }
327         if (!strnicmp(buf, "activate", 8)) {
328                 retval = pnp_activate_dev(dev);
329                 goto done;
330         }
331         if (!strnicmp(buf, "fill", 4)) {
332                 if (dev->active)
333                         goto done;
334                 retval = pnp_auto_config_dev(dev);
335                 goto done;
336         }
337         if (!strnicmp(buf, "auto", 4)) {
338                 if (dev->active)
339                         goto done;
340                 pnp_init_resources(dev);
341                 retval = pnp_auto_config_dev(dev);
342                 goto done;
343         }
344         if (!strnicmp(buf, "clear", 5)) {
345                 if (dev->active)
346                         goto done;
347                 pnp_init_resources(dev);
348                 goto done;
349         }
350         if (!strnicmp(buf, "get", 3)) {
351                 mutex_lock(&pnp_res_mutex);
352                 if (pnp_can_read(dev))
353                         dev->protocol->get(dev);
354                 mutex_unlock(&pnp_res_mutex);
355                 goto done;
356         }
357         if (!strnicmp(buf, "set", 3)) {
358                 if (dev->active)
359                         goto done;
360                 buf += 3;
361                 pnp_init_resources(dev);
362                 mutex_lock(&pnp_res_mutex);
363                 while (1) {
364                         while (isspace(*buf))
365                                 ++buf;
366                         if (!strnicmp(buf, "io", 2)) {
367                                 buf += 2;
368                                 while (isspace(*buf))
369                                         ++buf;
370                                 start = simple_strtoul(buf, &buf, 0);
371                                 while (isspace(*buf))
372                                         ++buf;
373                                 if (*buf == '-') {
374                                         buf += 1;
375                                         while (isspace(*buf))
376                                                 ++buf;
377                                         end = simple_strtoul(buf, &buf, 0);
378                                 } else
379                                         end = start;
380                                 pnp_add_io_resource(dev, start, end, 0);
381                                 continue;
382                         }
383                         if (!strnicmp(buf, "mem", 3)) {
384                                 buf += 3;
385                                 while (isspace(*buf))
386                                         ++buf;
387                                 start = simple_strtoul(buf, &buf, 0);
388                                 while (isspace(*buf))
389                                         ++buf;
390                                 if (*buf == '-') {
391                                         buf += 1;
392                                         while (isspace(*buf))
393                                                 ++buf;
394                                         end = simple_strtoul(buf, &buf, 0);
395                                 } else
396                                         end = start;
397                                 pnp_add_mem_resource(dev, start, end, 0);
398                                 continue;
399                         }
400                         if (!strnicmp(buf, "irq", 3)) {
401                                 buf += 3;
402                                 while (isspace(*buf))
403                                         ++buf;
404                                 start = simple_strtoul(buf, &buf, 0);
405                                 pnp_add_irq_resource(dev, start, 0);
406                                 continue;
407                         }
408                         if (!strnicmp(buf, "dma", 3)) {
409                                 buf += 3;
410                                 while (isspace(*buf))
411                                         ++buf;
412                                 start = simple_strtoul(buf, &buf, 0);
413                                 pnp_add_dma_resource(dev, start, 0);
414                                 continue;
415                         }
416                         break;
417                 }
418                 mutex_unlock(&pnp_res_mutex);
419                 goto done;
420         }
421
422 done:
423         if (retval < 0)
424                 return retval;
425         return count;
426 }
427
428 static DEVICE_ATTR(resources, S_IRUGO | S_IWUSR,
429                    pnp_show_current_resources, pnp_set_current_resources);
430
431 static ssize_t pnp_show_current_ids(struct device *dmdev,
432                                     struct device_attribute *attr, char *buf)
433 {
434         char *str = buf;
435         struct pnp_dev *dev = to_pnp_dev(dmdev);
436         struct pnp_id *pos = dev->id;
437
438         while (pos) {
439                 str += sprintf(str, "%s\n", pos->id);
440                 pos = pos->next;
441         }
442         return (str - buf);
443 }
444
445 static DEVICE_ATTR(id, S_IRUGO, pnp_show_current_ids, NULL);
446
447 int pnp_interface_attach_device(struct pnp_dev *dev)
448 {
449         int rc = device_create_file(&dev->dev, &dev_attr_options);
450
451         if (rc)
452                 goto err;
453         rc = device_create_file(&dev->dev, &dev_attr_resources);
454         if (rc)
455                 goto err_opt;
456         rc = device_create_file(&dev->dev, &dev_attr_id);
457         if (rc)
458                 goto err_res;
459
460         return 0;
461
462 err_res:
463         device_remove_file(&dev->dev, &dev_attr_resources);
464 err_opt:
465         device_remove_file(&dev->dev, &dev_attr_options);
466 err:
467         return rc;
468 }