[ALSA] Changed Jaroslav Kysela's e-mail from perex@suse.cz to perex@perex.cz
[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/stat.h>
14 #include <linux/ctype.h>
15 #include <linux/slab.h>
16 #include <asm/uaccess.h>
17
18 #include "base.h"
19
20 struct pnp_info_buffer {
21         char *buffer;           /* pointer to begin of buffer */
22         char *curr;             /* current position in buffer */
23         unsigned long size;     /* current size */
24         unsigned long len;      /* total length of buffer */
25         int stop;               /* stop flag */
26         int error;              /* error code */
27 };
28
29 typedef struct pnp_info_buffer pnp_info_buffer_t;
30
31 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
32 {
33         va_list args;
34         int res;
35
36         if (buffer->stop || buffer->error)
37                 return 0;
38         va_start(args, fmt);
39         res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
40         va_end(args);
41         if (buffer->size + res >= buffer->len) {
42                 buffer->stop = 1;
43                 return 0;
44         }
45         buffer->curr += res;
46         buffer->size += res;
47         return res;
48 }
49
50 static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
51                            struct pnp_port *port)
52 {
53         pnp_printf(buffer,
54                    "%sport 0x%x-0x%x, align 0x%x, size 0x%x, %i-bit address decoding\n",
55                    space, port->min, port->max,
56                    port->align ? (port->align - 1) : 0, port->size,
57                    port->flags & PNP_PORT_FLAG_16BITADDR ? 16 : 10);
58 }
59
60 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
61                           struct pnp_irq *irq)
62 {
63         int first = 1, i;
64
65         pnp_printf(buffer, "%sirq ", space);
66         for (i = 0; i < PNP_IRQ_NR; i++)
67                 if (test_bit(i, irq->map)) {
68                         if (!first) {
69                                 pnp_printf(buffer, ",");
70                         } else {
71                                 first = 0;
72                         }
73                         if (i == 2 || i == 9)
74                                 pnp_printf(buffer, "2/9");
75                         else
76                                 pnp_printf(buffer, "%i", i);
77                 }
78         if (bitmap_empty(irq->map, PNP_IRQ_NR))
79                 pnp_printf(buffer, "<none>");
80         if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
81                 pnp_printf(buffer, " High-Edge");
82         if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
83                 pnp_printf(buffer, " Low-Edge");
84         if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
85                 pnp_printf(buffer, " High-Level");
86         if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
87                 pnp_printf(buffer, " Low-Level");
88         pnp_printf(buffer, "\n");
89 }
90
91 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
92                           struct pnp_dma *dma)
93 {
94         int first = 1, i;
95         char *s;
96
97         pnp_printf(buffer, "%sdma ", space);
98         for (i = 0; i < 8; i++)
99                 if (dma->map & (1 << i)) {
100                         if (!first) {
101                                 pnp_printf(buffer, ",");
102                         } else {
103                                 first = 0;
104                         }
105                         pnp_printf(buffer, "%i", i);
106                 }
107         if (!dma->map)
108                 pnp_printf(buffer, "<none>");
109         switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
110         case IORESOURCE_DMA_8BIT:
111                 s = "8-bit";
112                 break;
113         case IORESOURCE_DMA_8AND16BIT:
114                 s = "8-bit&16-bit";
115                 break;
116         default:
117                 s = "16-bit";
118         }
119         pnp_printf(buffer, " %s", s);
120         if (dma->flags & IORESOURCE_DMA_MASTER)
121                 pnp_printf(buffer, " master");
122         if (dma->flags & IORESOURCE_DMA_BYTE)
123                 pnp_printf(buffer, " byte-count");
124         if (dma->flags & IORESOURCE_DMA_WORD)
125                 pnp_printf(buffer, " word-count");
126         switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
127         case IORESOURCE_DMA_TYPEA:
128                 s = "type-A";
129                 break;
130         case IORESOURCE_DMA_TYPEB:
131                 s = "type-B";
132                 break;
133         case IORESOURCE_DMA_TYPEF:
134                 s = "type-F";
135                 break;
136         default:
137                 s = "compatible";
138                 break;
139         }
140         pnp_printf(buffer, " %s\n", s);
141 }
142
143 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
144                           struct pnp_mem *mem)
145 {
146         char *s;
147
148         pnp_printf(buffer, "%sMemory 0x%x-0x%x, align 0x%x, size 0x%x",
149                    space, mem->min, mem->max, mem->align, mem->size);
150         if (mem->flags & IORESOURCE_MEM_WRITEABLE)
151                 pnp_printf(buffer, ", writeable");
152         if (mem->flags & IORESOURCE_MEM_CACHEABLE)
153                 pnp_printf(buffer, ", cacheable");
154         if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
155                 pnp_printf(buffer, ", range-length");
156         if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
157                 pnp_printf(buffer, ", shadowable");
158         if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
159                 pnp_printf(buffer, ", expansion ROM");
160         switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
161         case IORESOURCE_MEM_8BIT:
162                 s = "8-bit";
163                 break;
164         case IORESOURCE_MEM_8AND16BIT:
165                 s = "8-bit&16-bit";
166                 break;
167         case IORESOURCE_MEM_32BIT:
168                 s = "32-bit";
169                 break;
170         default:
171                 s = "16-bit";
172         }
173         pnp_printf(buffer, ", %s\n", s);
174 }
175
176 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
177                              struct pnp_option *option, int dep)
178 {
179         char *s;
180         struct pnp_port *port;
181         struct pnp_irq *irq;
182         struct pnp_dma *dma;
183         struct pnp_mem *mem;
184
185         if (dep) {
186                 switch (option->priority) {
187                 case PNP_RES_PRIORITY_PREFERRED:
188                         s = "preferred";
189                         break;
190                 case PNP_RES_PRIORITY_ACCEPTABLE:
191                         s = "acceptable";
192                         break;
193                 case PNP_RES_PRIORITY_FUNCTIONAL:
194                         s = "functional";
195                         break;
196                 default:
197                         s = "invalid";
198                 }
199                 pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
200         }
201
202         for (port = option->port; port; port = port->next)
203                 pnp_print_port(buffer, space, port);
204         for (irq = option->irq; irq; irq = irq->next)
205                 pnp_print_irq(buffer, space, irq);
206         for (dma = option->dma; dma; dma = dma->next)
207                 pnp_print_dma(buffer, space, dma);
208         for (mem = option->mem; mem; mem = mem->next)
209                 pnp_print_mem(buffer, space, mem);
210 }
211
212 static ssize_t pnp_show_options(struct device *dmdev,
213                                 struct device_attribute *attr, char *buf)
214 {
215         struct pnp_dev *dev = to_pnp_dev(dmdev);
216         struct pnp_option *independent = dev->independent;
217         struct pnp_option *dependent = dev->dependent;
218         int ret, dep = 1;
219
220         pnp_info_buffer_t *buffer = (pnp_info_buffer_t *)
221             pnp_alloc(sizeof(pnp_info_buffer_t));
222         if (!buffer)
223                 return -ENOMEM;
224
225         buffer->len = PAGE_SIZE;
226         buffer->buffer = buf;
227         buffer->curr = buffer->buffer;
228         if (independent)
229                 pnp_print_option(buffer, "", independent, 0);
230
231         while (dependent) {
232                 pnp_print_option(buffer, "   ", dependent, dep);
233                 dependent = dependent->next;
234                 dep++;
235         }
236         ret = (buffer->curr - buf);
237         kfree(buffer);
238         return ret;
239 }
240
241 static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);
242
243 static ssize_t pnp_show_current_resources(struct device *dmdev,
244                                           struct device_attribute *attr,
245                                           char *buf)
246 {
247         struct pnp_dev *dev = to_pnp_dev(dmdev);
248         int i, ret;
249         pnp_info_buffer_t *buffer;
250
251         if (!dev)
252                 return -EINVAL;
253
254         buffer = (pnp_info_buffer_t *) pnp_alloc(sizeof(pnp_info_buffer_t));
255         if (!buffer)
256                 return -ENOMEM;
257         buffer->len = PAGE_SIZE;
258         buffer->buffer = buf;
259         buffer->curr = buffer->buffer;
260
261         pnp_printf(buffer, "state = ");
262         if (dev->active)
263                 pnp_printf(buffer, "active\n");
264         else
265                 pnp_printf(buffer, "disabled\n");
266
267         for (i = 0; i < PNP_MAX_PORT; i++) {
268                 if (pnp_port_valid(dev, i)) {
269                         pnp_printf(buffer, "io");
270                         if (pnp_port_flags(dev, i) & IORESOURCE_DISABLED)
271                                 pnp_printf(buffer, " disabled\n");
272                         else
273                                 pnp_printf(buffer, " 0x%llx-0x%llx\n",
274                                            (unsigned long long)
275                                            pnp_port_start(dev, i),
276                                            (unsigned long long)pnp_port_end(dev,
277                                                                             i));
278                 }
279         }
280         for (i = 0; i < PNP_MAX_MEM; i++) {
281                 if (pnp_mem_valid(dev, i)) {
282                         pnp_printf(buffer, "mem");
283                         if (pnp_mem_flags(dev, i) & IORESOURCE_DISABLED)
284                                 pnp_printf(buffer, " disabled\n");
285                         else
286                                 pnp_printf(buffer, " 0x%llx-0x%llx\n",
287                                            (unsigned long long)
288                                            pnp_mem_start(dev, i),
289                                            (unsigned long long)pnp_mem_end(dev,
290                                                                            i));
291                 }
292         }
293         for (i = 0; i < PNP_MAX_IRQ; i++) {
294                 if (pnp_irq_valid(dev, i)) {
295                         pnp_printf(buffer, "irq");
296                         if (pnp_irq_flags(dev, i) & IORESOURCE_DISABLED)
297                                 pnp_printf(buffer, " disabled\n");
298                         else
299                                 pnp_printf(buffer, " %lld\n",
300                                            (unsigned long long)pnp_irq(dev, i));
301                 }
302         }
303         for (i = 0; i < PNP_MAX_DMA; i++) {
304                 if (pnp_dma_valid(dev, i)) {
305                         pnp_printf(buffer, "dma");
306                         if (pnp_dma_flags(dev, i) & IORESOURCE_DISABLED)
307                                 pnp_printf(buffer, " disabled\n");
308                         else
309                                 pnp_printf(buffer, " %lld\n",
310                                            (unsigned long long)pnp_dma(dev, i));
311                 }
312         }
313         ret = (buffer->curr - buf);
314         kfree(buffer);
315         return ret;
316 }
317
318 extern struct semaphore pnp_res_mutex;
319
320 static ssize_t
321 pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
322                           const char *ubuf, size_t count)
323 {
324         struct pnp_dev *dev = to_pnp_dev(dmdev);
325         char *buf = (void *)ubuf;
326         int retval = 0;
327
328         if (dev->status & PNP_ATTACHED) {
329                 retval = -EBUSY;
330                 pnp_info("Device %s cannot be configured because it is in use.",
331                          dev->dev.bus_id);
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_resource_table(&dev->res);
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_resource_table(&dev->res);
362                 goto done;
363         }
364         if (!strnicmp(buf, "get", 3)) {
365                 down(&pnp_res_mutex);
366                 if (pnp_can_read(dev))
367                         dev->protocol->get(dev, &dev->res);
368                 up(&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_resource_table(&dev->res);
377                 down(&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                 up(&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 }