cdc3ecfde6ef37df577c3215a6a3132e0e4171f1
[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,
57                    "%sport 0x%x-0x%x, align 0x%x, size 0x%x, %i-bit address decoding\n",
58                    space, port->min, port->max,
59                    port->align ? (port->align - 1) : 0, port->size,
60                    port->flags & PNP_PORT_FLAG_16BITADDR ? 16 : 10);
61 }
62
63 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
64                           struct pnp_irq *irq)
65 {
66         int first = 1, i;
67
68         pnp_printf(buffer, "%sirq ", space);
69         for (i = 0; i < PNP_IRQ_NR; i++)
70                 if (test_bit(i, irq->map)) {
71                         if (!first) {
72                                 pnp_printf(buffer, ",");
73                         } else {
74                                 first = 0;
75                         }
76                         if (i == 2 || i == 9)
77                                 pnp_printf(buffer, "2/9");
78                         else
79                                 pnp_printf(buffer, "%i", i);
80                 }
81         if (bitmap_empty(irq->map, PNP_IRQ_NR))
82                 pnp_printf(buffer, "<none>");
83         if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
84                 pnp_printf(buffer, " High-Edge");
85         if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
86                 pnp_printf(buffer, " Low-Edge");
87         if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
88                 pnp_printf(buffer, " High-Level");
89         if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
90                 pnp_printf(buffer, " Low-Level");
91         pnp_printf(buffer, "\n");
92 }
93
94 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
95                           struct pnp_dma *dma)
96 {
97         int first = 1, i;
98         char *s;
99
100         pnp_printf(buffer, "%sdma ", space);
101         for (i = 0; i < 8; i++)
102                 if (dma->map & (1 << i)) {
103                         if (!first) {
104                                 pnp_printf(buffer, ",");
105                         } else {
106                                 first = 0;
107                         }
108                         pnp_printf(buffer, "%i", i);
109                 }
110         if (!dma->map)
111                 pnp_printf(buffer, "<none>");
112         switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
113         case IORESOURCE_DMA_8BIT:
114                 s = "8-bit";
115                 break;
116         case IORESOURCE_DMA_8AND16BIT:
117                 s = "8-bit&16-bit";
118                 break;
119         default:
120                 s = "16-bit";
121         }
122         pnp_printf(buffer, " %s", s);
123         if (dma->flags & IORESOURCE_DMA_MASTER)
124                 pnp_printf(buffer, " master");
125         if (dma->flags & IORESOURCE_DMA_BYTE)
126                 pnp_printf(buffer, " byte-count");
127         if (dma->flags & IORESOURCE_DMA_WORD)
128                 pnp_printf(buffer, " word-count");
129         switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
130         case IORESOURCE_DMA_TYPEA:
131                 s = "type-A";
132                 break;
133         case IORESOURCE_DMA_TYPEB:
134                 s = "type-B";
135                 break;
136         case IORESOURCE_DMA_TYPEF:
137                 s = "type-F";
138                 break;
139         default:
140                 s = "compatible";
141                 break;
142         }
143         pnp_printf(buffer, " %s\n", s);
144 }
145
146 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
147                           struct pnp_mem *mem)
148 {
149         char *s;
150
151         pnp_printf(buffer, "%sMemory 0x%x-0x%x, align 0x%x, size 0x%x",
152                    space, mem->min, mem->max, mem->align, mem->size);
153         if (mem->flags & IORESOURCE_MEM_WRITEABLE)
154                 pnp_printf(buffer, ", writeable");
155         if (mem->flags & IORESOURCE_MEM_CACHEABLE)
156                 pnp_printf(buffer, ", cacheable");
157         if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
158                 pnp_printf(buffer, ", range-length");
159         if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
160                 pnp_printf(buffer, ", shadowable");
161         if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
162                 pnp_printf(buffer, ", expansion ROM");
163         switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
164         case IORESOURCE_MEM_8BIT:
165                 s = "8-bit";
166                 break;
167         case IORESOURCE_MEM_8AND16BIT:
168                 s = "8-bit&16-bit";
169                 break;
170         case IORESOURCE_MEM_32BIT:
171                 s = "32-bit";
172                 break;
173         default:
174                 s = "16-bit";
175         }
176         pnp_printf(buffer, ", %s\n", s);
177 }
178
179 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
180                              struct pnp_option *option, int dep)
181 {
182         char *s;
183         struct pnp_port *port;
184         struct pnp_irq *irq;
185         struct pnp_dma *dma;
186         struct pnp_mem *mem;
187
188         if (dep) {
189                 switch (option->priority) {
190                 case PNP_RES_PRIORITY_PREFERRED:
191                         s = "preferred";
192                         break;
193                 case PNP_RES_PRIORITY_ACCEPTABLE:
194                         s = "acceptable";
195                         break;
196                 case PNP_RES_PRIORITY_FUNCTIONAL:
197                         s = "functional";
198                         break;
199                 default:
200                         s = "invalid";
201                 }
202                 pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
203         }
204
205         for (port = option->port; port; port = port->next)
206                 pnp_print_port(buffer, space, port);
207         for (irq = option->irq; irq; irq = irq->next)
208                 pnp_print_irq(buffer, space, irq);
209         for (dma = option->dma; dma; dma = dma->next)
210                 pnp_print_dma(buffer, space, dma);
211         for (mem = option->mem; mem; mem = mem->next)
212                 pnp_print_mem(buffer, space, mem);
213 }
214
215 static ssize_t pnp_show_options(struct device *dmdev,
216                                 struct device_attribute *attr, char *buf)
217 {
218         struct pnp_dev *dev = to_pnp_dev(dmdev);
219         struct pnp_option *independent = dev->independent;
220         struct pnp_option *dependent = dev->dependent;
221         int ret, dep = 1;
222
223         pnp_info_buffer_t *buffer = (pnp_info_buffer_t *)
224             pnp_alloc(sizeof(pnp_info_buffer_t));
225         if (!buffer)
226                 return -ENOMEM;
227
228         buffer->len = PAGE_SIZE;
229         buffer->buffer = buf;
230         buffer->curr = buffer->buffer;
231         if (independent)
232                 pnp_print_option(buffer, "", independent, 0);
233
234         while (dependent) {
235                 pnp_print_option(buffer, "   ", dependent, dep);
236                 dependent = dependent->next;
237                 dep++;
238         }
239         ret = (buffer->curr - buf);
240         kfree(buffer);
241         return ret;
242 }
243
244 static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);
245
246 static ssize_t pnp_show_current_resources(struct device *dmdev,
247                                           struct device_attribute *attr,
248                                           char *buf)
249 {
250         struct pnp_dev *dev = to_pnp_dev(dmdev);
251         int i, ret;
252         pnp_info_buffer_t *buffer;
253
254         if (!dev)
255                 return -EINVAL;
256
257         buffer = (pnp_info_buffer_t *) pnp_alloc(sizeof(pnp_info_buffer_t));
258         if (!buffer)
259                 return -ENOMEM;
260         buffer->len = PAGE_SIZE;
261         buffer->buffer = buf;
262         buffer->curr = buffer->buffer;
263
264         pnp_printf(buffer, "state = ");
265         if (dev->active)
266                 pnp_printf(buffer, "active\n");
267         else
268                 pnp_printf(buffer, "disabled\n");
269
270         for (i = 0; i < PNP_MAX_PORT; i++) {
271                 if (pnp_port_valid(dev, i)) {
272                         pnp_printf(buffer, "io");
273                         if (pnp_port_flags(dev, i) & IORESOURCE_DISABLED)
274                                 pnp_printf(buffer, " disabled\n");
275                         else
276                                 pnp_printf(buffer, " 0x%llx-0x%llx\n",
277                                            (unsigned long long)
278                                            pnp_port_start(dev, i),
279                                            (unsigned long long)pnp_port_end(dev,
280                                                                             i));
281                 }
282         }
283         for (i = 0; i < PNP_MAX_MEM; i++) {
284                 if (pnp_mem_valid(dev, i)) {
285                         pnp_printf(buffer, "mem");
286                         if (pnp_mem_flags(dev, i) & IORESOURCE_DISABLED)
287                                 pnp_printf(buffer, " disabled\n");
288                         else
289                                 pnp_printf(buffer, " 0x%llx-0x%llx\n",
290                                            (unsigned long long)
291                                            pnp_mem_start(dev, i),
292                                            (unsigned long long)pnp_mem_end(dev,
293                                                                            i));
294                 }
295         }
296         for (i = 0; i < PNP_MAX_IRQ; i++) {
297                 if (pnp_irq_valid(dev, i)) {
298                         pnp_printf(buffer, "irq");
299                         if (pnp_irq_flags(dev, i) & IORESOURCE_DISABLED)
300                                 pnp_printf(buffer, " disabled\n");
301                         else
302                                 pnp_printf(buffer, " %lld\n",
303                                            (unsigned long long)pnp_irq(dev, i));
304                 }
305         }
306         for (i = 0; i < PNP_MAX_DMA; i++) {
307                 if (pnp_dma_valid(dev, i)) {
308                         pnp_printf(buffer, "dma");
309                         if (pnp_dma_flags(dev, i) & IORESOURCE_DISABLED)
310                                 pnp_printf(buffer, " disabled\n");
311                         else
312                                 pnp_printf(buffer, " %lld\n",
313                                            (unsigned long long)pnp_dma(dev, i));
314                 }
315         }
316         ret = (buffer->curr - buf);
317         kfree(buffer);
318         return ret;
319 }
320
321 static ssize_t
322 pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
323                           const char *ubuf, size_t count)
324 {
325         struct pnp_dev *dev = to_pnp_dev(dmdev);
326         char *buf = (void *)ubuf;
327         int retval = 0;
328
329         if (dev->status & PNP_ATTACHED) {
330                 retval = -EBUSY;
331                 dev_info(&dev->dev, "in use; can't configure\n");
332                 goto done;
333         }
334
335         while (isspace(*buf))
336                 ++buf;
337         if (!strnicmp(buf, "disable", 7)) {
338                 retval = pnp_disable_dev(dev);
339                 goto done;
340         }
341         if (!strnicmp(buf, "activate", 8)) {
342                 retval = pnp_activate_dev(dev);
343                 goto done;
344         }
345         if (!strnicmp(buf, "fill", 4)) {
346                 if (dev->active)
347                         goto done;
348                 retval = pnp_auto_config_dev(dev);
349                 goto done;
350         }
351         if (!strnicmp(buf, "auto", 4)) {
352                 if (dev->active)
353                         goto done;
354                 pnp_init_resources(dev);
355                 retval = pnp_auto_config_dev(dev);
356                 goto done;
357         }
358         if (!strnicmp(buf, "clear", 5)) {
359                 if (dev->active)
360                         goto done;
361                 pnp_init_resources(dev);
362                 goto done;
363         }
364         if (!strnicmp(buf, "get", 3)) {
365                 mutex_lock(&pnp_res_mutex);
366                 if (pnp_can_read(dev))
367                         dev->protocol->get(dev);
368                 mutex_unlock(&pnp_res_mutex);
369                 goto done;
370         }
371         if (!strnicmp(buf, "set", 3)) {
372                 int nport = 0, nmem = 0, nirq = 0, ndma = 0;
373                 if (dev->active)
374                         goto done;
375                 buf += 3;
376                 pnp_init_resources(dev);
377                 mutex_lock(&pnp_res_mutex);
378                 while (1) {
379                         while (isspace(*buf))
380                                 ++buf;
381                         if (!strnicmp(buf, "io", 2)) {
382                                 buf += 2;
383                                 while (isspace(*buf))
384                                         ++buf;
385                                 dev->res.port_resource[nport].start =
386                                     simple_strtoul(buf, &buf, 0);
387                                 while (isspace(*buf))
388                                         ++buf;
389                                 if (*buf == '-') {
390                                         buf += 1;
391                                         while (isspace(*buf))
392                                                 ++buf;
393                                         dev->res.port_resource[nport].end =
394                                             simple_strtoul(buf, &buf, 0);
395                                 } else
396                                         dev->res.port_resource[nport].end =
397                                             dev->res.port_resource[nport].start;
398                                 dev->res.port_resource[nport].flags =
399                                     IORESOURCE_IO;
400                                 nport++;
401                                 if (nport >= PNP_MAX_PORT)
402                                         break;
403                                 continue;
404                         }
405                         if (!strnicmp(buf, "mem", 3)) {
406                                 buf += 3;
407                                 while (isspace(*buf))
408                                         ++buf;
409                                 dev->res.mem_resource[nmem].start =
410                                     simple_strtoul(buf, &buf, 0);
411                                 while (isspace(*buf))
412                                         ++buf;
413                                 if (*buf == '-') {
414                                         buf += 1;
415                                         while (isspace(*buf))
416                                                 ++buf;
417                                         dev->res.mem_resource[nmem].end =
418                                             simple_strtoul(buf, &buf, 0);
419                                 } else
420                                         dev->res.mem_resource[nmem].end =
421                                             dev->res.mem_resource[nmem].start;
422                                 dev->res.mem_resource[nmem].flags =
423                                     IORESOURCE_MEM;
424                                 nmem++;
425                                 if (nmem >= PNP_MAX_MEM)
426                                         break;
427                                 continue;
428                         }
429                         if (!strnicmp(buf, "irq", 3)) {
430                                 buf += 3;
431                                 while (isspace(*buf))
432                                         ++buf;
433                                 dev->res.irq_resource[nirq].start =
434                                     dev->res.irq_resource[nirq].end =
435                                     simple_strtoul(buf, &buf, 0);
436                                 dev->res.irq_resource[nirq].flags =
437                                     IORESOURCE_IRQ;
438                                 nirq++;
439                                 if (nirq >= PNP_MAX_IRQ)
440                                         break;
441                                 continue;
442                         }
443                         if (!strnicmp(buf, "dma", 3)) {
444                                 buf += 3;
445                                 while (isspace(*buf))
446                                         ++buf;
447                                 dev->res.dma_resource[ndma].start =
448                                     dev->res.dma_resource[ndma].end =
449                                     simple_strtoul(buf, &buf, 0);
450                                 dev->res.dma_resource[ndma].flags =
451                                     IORESOURCE_DMA;
452                                 ndma++;
453                                 if (ndma >= PNP_MAX_DMA)
454                                         break;
455                                 continue;
456                         }
457                         break;
458                 }
459                 mutex_unlock(&pnp_res_mutex);
460                 goto done;
461         }
462
463 done:
464         if (retval < 0)
465                 return retval;
466         return count;
467 }
468
469 static DEVICE_ATTR(resources, S_IRUGO | S_IWUSR,
470                    pnp_show_current_resources, pnp_set_current_resources);
471
472 static ssize_t pnp_show_current_ids(struct device *dmdev,
473                                     struct device_attribute *attr, char *buf)
474 {
475         char *str = buf;
476         struct pnp_dev *dev = to_pnp_dev(dmdev);
477         struct pnp_id *pos = dev->id;
478
479         while (pos) {
480                 str += sprintf(str, "%s\n", pos->id);
481                 pos = pos->next;
482         }
483         return (str - buf);
484 }
485
486 static DEVICE_ATTR(id, S_IRUGO, pnp_show_current_ids, NULL);
487
488 int pnp_interface_attach_device(struct pnp_dev *dev)
489 {
490         int rc = device_create_file(&dev->dev, &dev_attr_options);
491
492         if (rc)
493                 goto err;
494         rc = device_create_file(&dev->dev, &dev_attr_resources);
495         if (rc)
496                 goto err_opt;
497         rc = device_create_file(&dev->dev, &dev_attr_id);
498         if (rc)
499                 goto err_res;
500
501         return 0;
502
503 err_res:
504         device_remove_file(&dev->dev, &dev_attr_resources);
505 err_opt:
506         device_remove_file(&dev->dev, &dev_attr_options);
507 err:
508         return rc;
509 }