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 }