err.no Git - linux-2.6/blob - 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@suse.cz>
   5  * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
   6  *
   7  */
   8
   9 #include <linux/pnp.h>
  10 #include <linux/string.h>
  11 #include <linux/errno.h>
  12 #include <linux/list.h>
  13 #include <linux/types.h>
  14 #include <linux/stat.h>
  15 #include <linux/ctype.h>
  16 #include <linux/slab.h>
  17 #include <asm/uaccess.h>
  18
  19 #include "base.h"
  20
  21 struct pnp_info_buffer {
  22         char *buffer;           /* pointer to begin of buffer */
  23         char *curr;             /* current position in buffer */
  24         unsigned long size;     /* current size */
  25         unsigned long len;      /* total length of buffer */
  26         int stop;               /* stop flag */
  27         int error;              /* error code */
  28 };
  29
  30 typedef struct pnp_info_buffer pnp_info_buffer_t;
  31
  32 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
  33 {
  34         va_list args;
  35         int res;
  36
  37         if (buffer->stop || buffer->error)
  38                 return 0;
  39         va_start(args, fmt);
  40         res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
  41         va_end(args);
  42         if (buffer->size + res >= buffer->len) {
  43                 buffer->stop = 1;
  44                 return 0;
  45         }
  46         buffer->curr += res;
  47         buffer->size += res;
  48         return res;
  49 }
  50
  51 static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
  52                            struct pnp_port *port)
  53 {
  54         pnp_printf(buffer,
  55                    "%sport 0x%x-0x%x, align 0x%x, size 0x%x, %i-bit address decoding\n",
  56                    space, port->min, port->max,
  57                    port->align ? (port->align - 1) : 0, port->size,
  58                    port->flags & PNP_PORT_FLAG_16BITADDR ? 16 : 10);
  59 }
  60
  61 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
  62                           struct pnp_irq *irq)
  63 {
  64         int first = 1, i;
  65
  66         pnp_printf(buffer, "%sirq ", space);
  67         for (i = 0; i < PNP_IRQ_NR; i++)
  68                 if (test_bit(i, irq->map)) {
  69                         if (!first) {
  70                                 pnp_printf(buffer, ",");
  71                         } else {
  72                                 first = 0;
  73                         }
  74                         if (i == 2 || i == 9)
  75                                 pnp_printf(buffer, "2/9");
  76                         else
  77                                 pnp_printf(buffer, "%i", i);
  78                 }
  79         if (bitmap_empty(irq->map, PNP_IRQ_NR))
  80                 pnp_printf(buffer, "<none>");
  81         if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
  82                 pnp_printf(buffer, " High-Edge");
  83         if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
  84                 pnp_printf(buffer, " Low-Edge");
  85         if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
  86                 pnp_printf(buffer, " High-Level");
  87         if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
  88                 pnp_printf(buffer, " Low-Level");
  89         pnp_printf(buffer, "\n");
  90 }
  91
  92 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
  93                           struct pnp_dma *dma)
  94 {
  95         int first = 1, i;
  96         char *s;
  97
  98         pnp_printf(buffer, "%sdma ", space);
  99         for (i = 0; i < 8; i++)
 100                 if (dma->map & (1 << i)) {
 101                         if (!first) {
 102                                 pnp_printf(buffer, ",");
 103                         } else {
 104                                 first = 0;
 105                         }
 106                         pnp_printf(buffer, "%i", i);
 107                 }
 108         if (!dma->map)
 109                 pnp_printf(buffer, "<none>");
 110         switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
 111         case IORESOURCE_DMA_8BIT:
 112                 s = "8-bit";
 113                 break;
 114         case IORESOURCE_DMA_8AND16BIT:
 115                 s = "8-bit&16-bit";
 116                 break;
 117         default:
 118                 s = "16-bit";
 119         }
 120         pnp_printf(buffer, " %s", s);
 121         if (dma->flags & IORESOURCE_DMA_MASTER)
 122                 pnp_printf(buffer, " master");
 123         if (dma->flags & IORESOURCE_DMA_BYTE)
 124                 pnp_printf(buffer, " byte-count");
 125         if (dma->flags & IORESOURCE_DMA_WORD)
 126                 pnp_printf(buffer, " word-count");
 127         switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
 128         case IORESOURCE_DMA_TYPEA:
 129                 s = "type-A";
 130                 break;
 131         case IORESOURCE_DMA_TYPEB:
 132                 s = "type-B";
 133                 break;
 134         case IORESOURCE_DMA_TYPEF:
 135                 s = "type-F";
 136                 break;
 137         default:
 138                 s = "compatible";
 139                 break;
 140         }
 141         pnp_printf(buffer, " %s\n", s);
 142 }
 143
 144 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
 145                           struct pnp_mem *mem)
 146 {
 147         char *s;
 148
 149         pnp_printf(buffer, "%sMemory 0x%x-0x%x, align 0x%x, size 0x%x",
 150                    space, mem->min, mem->max, mem->align, mem->size);
 151         if (mem->flags & IORESOURCE_MEM_WRITEABLE)
 152                 pnp_printf(buffer, ", writeable");
 153         if (mem->flags & IORESOURCE_MEM_CACHEABLE)
 154                 pnp_printf(buffer, ", cacheable");
 155         if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
 156                 pnp_printf(buffer, ", range-length");
 157         if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
 158                 pnp_printf(buffer, ", shadowable");
 159         if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
 160                 pnp_printf(buffer, ", expansion ROM");
 161         switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
 162         case IORESOURCE_MEM_8BIT:
 163                 s = "8-bit";
 164                 break;
 165         case IORESOURCE_MEM_8AND16BIT:
 166                 s = "8-bit&16-bit";
 167                 break;
 168         case IORESOURCE_MEM_32BIT:
 169                 s = "32-bit";
 170                 break;
 171         default:
 172                 s = "16-bit";
 173         }
 174         pnp_printf(buffer, ", %s\n", s);
 175 }
 176
 177 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
 178                              struct pnp_option *option, int dep)
 179 {
 180         char *s;
 181         struct pnp_port *port;
 182         struct pnp_irq *irq;
 183         struct pnp_dma *dma;
 184         struct pnp_mem *mem;
 185
 186         if (dep) {
 187                 switch (option->priority) {
 188                 case PNP_RES_PRIORITY_PREFERRED:
 189                         s = "preferred";
 190                         break;
 191                 case PNP_RES_PRIORITY_ACCEPTABLE:
 192                         s = "acceptable";
 193                         break;
 194                 case PNP_RES_PRIORITY_FUNCTIONAL:
 195                         s = "functional";
 196                         break;
 197                 default:
 198                         s = "invalid";
 199                 }
 200                 pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
 201         }
 202
 203         for (port = option->port; port; port = port->next)
 204                 pnp_print_port(buffer, space, port);
 205         for (irq = option->irq; irq; irq = irq->next)
 206                 pnp_print_irq(buffer, space, irq);
 207         for (dma = option->dma; dma; dma = dma->next)
 208                 pnp_print_dma(buffer, space, dma);
 209         for (mem = option->mem; mem; mem = mem->next)
 210                 pnp_print_mem(buffer, space, mem);
 211 }
 212
 213 static ssize_t pnp_show_options(struct device *dmdev,
 214                                 struct device_attribute *attr, char *buf)
 215 {
 216         struct pnp_dev *dev = to_pnp_dev(dmdev);
 217         struct pnp_option *independent = dev->independent;
 218         struct pnp_option *dependent = dev->dependent;
 219         int ret, dep = 1;
 220
 221         pnp_info_buffer_t *buffer = (pnp_info_buffer_t *)
 222             pnp_alloc(sizeof(pnp_info_buffer_t));
 223         if (!buffer)
 224                 return -ENOMEM;
 225
 226         buffer->len = PAGE_SIZE;
 227         buffer->buffer = buf;
 228         buffer->curr = buffer->buffer;
 229         if (independent)
 230                 pnp_print_option(buffer, "", independent, 0);
 231
 232         while (dependent) {
 233                 pnp_print_option(buffer, "   ", dependent, dep);
 234                 dependent = dependent->next;
 235                 dep++;
 236         }
 237         ret = (buffer->curr - buf);
 238         kfree(buffer);
 239         return ret;
 240 }
 241
 242 static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);
 243
 244 static ssize_t pnp_show_current_resources(struct device *dmdev,
 245                                           struct device_attribute *attr,
 246                                           char *buf)
 247 {
 248         struct pnp_dev *dev = to_pnp_dev(dmdev);
 249         int i, ret;
 250         pnp_info_buffer_t *buffer;
 251
 252         if (!dev)
 253                 return -EINVAL;
 254
 255         buffer = (pnp_info_buffer_t *) pnp_alloc(sizeof(pnp_info_buffer_t));
 256         if (!buffer)
 257                 return -ENOMEM;
 258         buffer->len = PAGE_SIZE;
 259         buffer->buffer = buf;
 260         buffer->curr = buffer->buffer;
 261
 262         pnp_printf(buffer, "state = ");
 263         if (dev->active)
 264                 pnp_printf(buffer, "active\n");
 265         else
 266                 pnp_printf(buffer, "disabled\n");
 267
 268         for (i = 0; i < PNP_MAX_PORT; i++) {
 269                 if (pnp_port_valid(dev, i)) {
 270                         pnp_printf(buffer, "io");
 271                         if (pnp_port_flags(dev, i) & IORESOURCE_DISABLED)
 272                                 pnp_printf(buffer, " disabled\n");
 273                         else
 274                                 pnp_printf(buffer, " 0x%llx-0x%llx\n",
 275                                            (unsigned long long)
 276                                            pnp_port_start(dev, i),
 277                                            (unsigned long long)pnp_port_end(dev,
 278                                                                             i));
 279                 }
 280         }
 281         for (i = 0; i < PNP_MAX_MEM; i++) {
 282                 if (pnp_mem_valid(dev, i)) {
 283                         pnp_printf(buffer, "mem");
 284                         if (pnp_mem_flags(dev, i) & IORESOURCE_DISABLED)
 285                                 pnp_printf(buffer, " disabled\n");
 286                         else
 287                                 pnp_printf(buffer, " 0x%llx-0x%llx\n",
 288                                            (unsigned long long)
 289                                            pnp_mem_start(dev, i),
 290                                            (unsigned long long)pnp_mem_end(dev,
 291                                                                            i));
 292                 }
 293         }
 294         for (i = 0; i < PNP_MAX_IRQ; i++) {
 295                 if (pnp_irq_valid(dev, i)) {
 296                         pnp_printf(buffer, "irq");
 297                         if (pnp_irq_flags(dev, i) & IORESOURCE_DISABLED)
 298                                 pnp_printf(buffer, " disabled\n");
 299                         else
 300                                 pnp_printf(buffer, " %lld\n",
 301                                            (unsigned long long)pnp_irq(dev, i));
 302                 }
 303         }
 304         for (i = 0; i < PNP_MAX_DMA; i++) {
 305                 if (pnp_dma_valid(dev, i)) {
 306                         pnp_printf(buffer, "dma");
 307                         if (pnp_dma_flags(dev, i) & IORESOURCE_DISABLED)
 308                                 pnp_printf(buffer, " disabled\n");
 309                         else
 310                                 pnp_printf(buffer, " %lld\n",
 311                                            (unsigned long long)pnp_dma(dev, i));
 312                 }
 313         }
 314         ret = (buffer->curr - buf);
 315         kfree(buffer);
 316         return ret;
 317 }
 318
 319 extern struct semaphore pnp_res_mutex;
 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                 pnp_info("Device %s cannot be configured because it is in use.",
 332                          dev->dev.bus_id);
 333                 goto done;
 334         }
 335
 336         while (isspace(*buf))
 337                 ++buf;
 338         if (!strnicmp(buf, "disable", 7)) {
 339                 retval = pnp_disable_dev(dev);
 340                 goto done;
 341         }
 342         if (!strnicmp(buf, "activate", 8)) {
 343                 retval = pnp_activate_dev(dev);
 344                 goto done;
 345         }
 346         if (!strnicmp(buf, "fill", 4)) {
 347                 if (dev->active)
 348                         goto done;
 349                 retval = pnp_auto_config_dev(dev);
 350                 goto done;
 351         }
 352         if (!strnicmp(buf, "auto", 4)) {
 353                 if (dev->active)
 354                         goto done;
 355                 pnp_init_resource_table(&dev->res);
 356                 retval = pnp_auto_config_dev(dev);
 357                 goto done;
 358         }
 359         if (!strnicmp(buf, "clear", 5)) {
 360                 if (dev->active)
 361                         goto done;
 362                 pnp_init_resource_table(&dev->res);
 363                 goto done;
 364         }
 365         if (!strnicmp(buf, "get", 3)) {
 366                 down(&pnp_res_mutex);
 367                 if (pnp_can_read(dev))
 368                         dev->protocol->get(dev, &dev->res);
 369                 up(&pnp_res_mutex);
 370                 goto done;
 371         }
 372         if (!strnicmp(buf, "set", 3)) {
 373                 int nport = 0, nmem = 0, nirq = 0, ndma = 0;
 374                 if (dev->active)
 375                         goto done;
 376                 buf += 3;
 377                 pnp_init_resource_table(&dev->res);
 378                 down(&pnp_res_mutex);
 379                 while (1) {
 380                         while (isspace(*buf))
 381                                 ++buf;
 382                         if (!strnicmp(buf, "io", 2)) {
 383                                 buf += 2;
 384                                 while (isspace(*buf))
 385                                         ++buf;
 386                                 dev->res.port_resource[nport].start =
 387                                     simple_strtoul(buf, &buf, 0);
 388                                 while (isspace(*buf))
 389                                         ++buf;
 390                                 if (*buf == '-') {
 391                                         buf += 1;
 392                                         while (isspace(*buf))
 393                                                 ++buf;
 394                                         dev->res.port_resource[nport].end =
 395                                             simple_strtoul(buf, &buf, 0);
 396                                 } else
 397                                         dev->res.port_resource[nport].end =
 398                                             dev->res.port_resource[nport].start;
 399                                 dev->res.port_resource[nport].flags =
 400                                     IORESOURCE_IO;
 401                                 nport++;
 402                                 if (nport >= PNP_MAX_PORT)
 403                                         break;
 404                                 continue;
 405                         }
 406                         if (!strnicmp(buf, "mem", 3)) {
 407                                 buf += 3;
 408                                 while (isspace(*buf))
 409                                         ++buf;
 410                                 dev->res.mem_resource[nmem].start =
 411                                     simple_strtoul(buf, &buf, 0);
 412                                 while (isspace(*buf))
 413                                         ++buf;
 414                                 if (*buf == '-') {
 415                                         buf += 1;
 416                                         while (isspace(*buf))
 417                                                 ++buf;
 418                                         dev->res.mem_resource[nmem].end =
 419                                             simple_strtoul(buf, &buf, 0);
 420                                 } else
 421                                         dev->res.mem_resource[nmem].end =
 422                                             dev->res.mem_resource[nmem].start;
 423                                 dev->res.mem_resource[nmem].flags =
 424                                     IORESOURCE_MEM;
 425                                 nmem++;
 426                                 if (nmem >= PNP_MAX_MEM)
 427                                         break;
 428                                 continue;
 429                         }
 430                         if (!strnicmp(buf, "irq", 3)) {
 431                                 buf += 3;
 432                                 while (isspace(*buf))
 433                                         ++buf;
 434                                 dev->res.irq_resource[nirq].start =
 435                                     dev->res.irq_resource[nirq].end =
 436                                     simple_strtoul(buf, &buf, 0);
 437                                 dev->res.irq_resource[nirq].flags =
 438                                     IORESOURCE_IRQ;
 439                                 nirq++;
 440                                 if (nirq >= PNP_MAX_IRQ)
 441                                         break;
 442                                 continue;
 443                         }
 444                         if (!strnicmp(buf, "dma", 3)) {
 445                                 buf += 3;
 446                                 while (isspace(*buf))
 447                                         ++buf;
 448                                 dev->res.dma_resource[ndma].start =
 449                                     dev->res.dma_resource[ndma].end =
 450                                     simple_strtoul(buf, &buf, 0);
 451                                 dev->res.dma_resource[ndma].flags =
 452                                     IORESOURCE_DMA;
 453                                 ndma++;
 454                                 if (ndma >= PNP_MAX_DMA)
 455                                         break;
 456                                 continue;
 457                         }
 458                         break;
 459                 }
 460                 up(&pnp_res_mutex);
 461                 goto done;
 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         if (rc)
 492                 goto err;
 493         rc = device_create_file(&dev->dev, &dev_attr_resources);
 494         if (rc)
 495                 goto err_opt;
 496         rc = device_create_file(&dev->dev, &dev_attr_id);
 497         if (rc)
 498                 goto err_res;
 499
 500         return 0;
 501
 502       err_res:
 503         device_remove_file(&dev->dev, &dev_attr_resources);
 504       err_opt:
 505         device_remove_file(&dev->dev, &dev_attr_options);
 506       err:
 507         return rc;
 508 }