[SCSI] zfcp: Cleanup function parameters for sbal value.
[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  * 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
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
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
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
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
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
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
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
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
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
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 };