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, "%sport %#llx-%#llx, align %#llx, size %#llx, "
  57                    "%i-bit address decoding\n", space,
  58                    (unsigned long long) port->min,
  59                    (unsigned long long) port->max,
  60                    port->align ? ((unsigned long long) port->align - 1) : 0,
  61                    (unsigned long long) port->size,
  62                    port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
  63 }
  64
  65 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
  66                           struct pnp_irq *irq)
  67 {
  68         int first = 1, i;
  69
  70         pnp_printf(buffer, "%sirq ", space);
  71         for (i = 0; i < PNP_IRQ_NR; i++)
  72                 if (test_bit(i, irq->map.bits)) {
  73                         if (!first) {
  74                                 pnp_printf(buffer, ",");
  75                         } else {
  76                                 first = 0;
  77                         }
  78                         if (i == 2 || i == 9)
  79                                 pnp_printf(buffer, "2/9");
  80                         else
  81                                 pnp_printf(buffer, "%i", i);
  82                 }
  83         if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
  84                 pnp_printf(buffer, "<none>");
  85         if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
  86                 pnp_printf(buffer, " High-Edge");
  87         if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
  88                 pnp_printf(buffer, " Low-Edge");
  89         if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
  90                 pnp_printf(buffer, " High-Level");
  91         if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
  92                 pnp_printf(buffer, " Low-Level");
  93         if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
  94                 pnp_printf(buffer, " (optional)");
  95         pnp_printf(buffer, "\n");
  96 }
  97
  98 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
  99                           struct pnp_dma *dma)
 100 {
 101         int first = 1, i;
 102         char *s;
 103
 104         pnp_printf(buffer, "%sdma ", space);
 105         for (i = 0; i < 8; i++)
 106                 if (dma->map & (1 << i)) {
 107                         if (!first) {
 108                                 pnp_printf(buffer, ",");
 109                         } else {
 110                                 first = 0;
 111                         }
 112                         pnp_printf(buffer, "%i", i);
 113                 }
 114         if (!dma->map)
 115                 pnp_printf(buffer, "<none>");
 116         switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
 117         case IORESOURCE_DMA_8BIT:
 118                 s = "8-bit";
 119                 break;
 120         case IORESOURCE_DMA_8AND16BIT:
 121                 s = "8-bit&16-bit";
 122                 break;
 123         default:
 124                 s = "16-bit";
 125         }
 126         pnp_printf(buffer, " %s", s);
 127         if (dma->flags & IORESOURCE_DMA_MASTER)
 128                 pnp_printf(buffer, " master");
 129         if (dma->flags & IORESOURCE_DMA_BYTE)
 130                 pnp_printf(buffer, " byte-count");
 131         if (dma->flags & IORESOURCE_DMA_WORD)
 132                 pnp_printf(buffer, " word-count");
 133         switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
 134         case IORESOURCE_DMA_TYPEA:
 135                 s = "type-A";
 136                 break;
 137         case IORESOURCE_DMA_TYPEB:
 138                 s = "type-B";
 139                 break;
 140         case IORESOURCE_DMA_TYPEF:
 141                 s = "type-F";
 142                 break;
 143         default:
 144                 s = "compatible";
 145                 break;
 146         }
 147         pnp_printf(buffer, " %s\n", s);
 148 }
 149
 150 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
 151                           struct pnp_mem *mem)
 152 {
 153         char *s;
 154
 155         pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
 156                    space, (unsigned long long) mem->min,
 157                    (unsigned long long) mem->max,
 158                    (unsigned long long) mem->align,
 159                    (unsigned long long) mem->size);
 160         if (mem->flags & IORESOURCE_MEM_WRITEABLE)
 161                 pnp_printf(buffer, ", writeable");
 162         if (mem->flags & IORESOURCE_MEM_CACHEABLE)
 163                 pnp_printf(buffer, ", cacheable");
 164         if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
 165                 pnp_printf(buffer, ", range-length");
 166         if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
 167                 pnp_printf(buffer, ", shadowable");
 168         if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
 169                 pnp_printf(buffer, ", expansion ROM");
 170         switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
 171         case IORESOURCE_MEM_8BIT:
 172                 s = "8-bit";
 173                 break;
 174         case IORESOURCE_MEM_8AND16BIT:
 175                 s = "8-bit&16-bit";
 176                 break;
 177         case IORESOURCE_MEM_32BIT:
 178                 s = "32-bit";
 179                 break;
 180         default:
 181                 s = "16-bit";
 182         }
 183         pnp_printf(buffer, ", %s\n", s);
 184 }
 185
 186 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
 187                              struct pnp_option *option, int dep)
 188 {
 189         char *s;
 190         struct pnp_port *port;
 191         struct pnp_irq *irq;
 192         struct pnp_dma *dma;
 193         struct pnp_mem *mem;
 194
 195         if (dep) {
 196                 switch (option->priority) {
 197                 case PNP_RES_PRIORITY_PREFERRED:
 198                         s = "preferred";
 199                         break;
 200                 case PNP_RES_PRIORITY_ACCEPTABLE:
 201                         s = "acceptable";
 202                         break;
 203                 case PNP_RES_PRIORITY_FUNCTIONAL:
 204                         s = "functional";
 205                         break;
 206                 default:
 207                         s = "invalid";
 208                 }
 209                 pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
 210         }
 211
 212         for (port = option->port; port; port = port->next)
 213                 pnp_print_port(buffer, space, port);
 214         for (irq = option->irq; irq; irq = irq->next)
 215                 pnp_print_irq(buffer, space, irq);
 216         for (dma = option->dma; dma; dma = dma->next)
 217                 pnp_print_dma(buffer, space, dma);
 218         for (mem = option->mem; mem; mem = mem->next)
 219                 pnp_print_mem(buffer, space, mem);
 220 }
 221
 222 static ssize_t pnp_show_options(struct device *dmdev,
 223                                 struct device_attribute *attr, char *buf)
 224 {
 225         struct pnp_dev *dev = to_pnp_dev(dmdev);
 226         pnp_info_buffer_t *buffer;
 227         struct pnp_option *independent = dev->independent;
 228         struct pnp_option *dependent = dev->dependent;
 229         int ret, dep = 1;
 230
 231         buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
 232         if (!buffer)
 233                 return -ENOMEM;
 234
 235         buffer->len = PAGE_SIZE;
 236         buffer->buffer = buf;
 237         buffer->curr = buffer->buffer;
 238         if (independent)
 239                 pnp_print_option(buffer, "", independent, 0);
 240
 241         while (dependent) {
 242                 pnp_print_option(buffer, "   ", dependent, dep);
 243                 dependent = dependent->next;
 244                 dep++;
 245         }
 246         ret = (buffer->curr - buf);
 247         kfree(buffer);
 248         return ret;
 249 }
 250
 251 static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);
 252
 253 static ssize_t pnp_show_current_resources(struct device *dmdev,
 254                                           struct device_attribute *attr,
 255                                           char *buf)
 256 {
 257         struct pnp_dev *dev = to_pnp_dev(dmdev);
 258         pnp_info_buffer_t *buffer;
 259         struct pnp_resource *pnp_res;
 260         struct resource *res;
 261         int ret;
 262
 263         if (!dev)
 264                 return -EINVAL;
 265
 266         buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
 267         if (!buffer)
 268                 return -ENOMEM;
 269
 270         buffer->len = PAGE_SIZE;
 271         buffer->buffer = buf;
 272         buffer->curr = buffer->buffer;
 273
 274         pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
 275
 276         list_for_each_entry(pnp_res, &dev->resources, list) {
 277                 res = &pnp_res->res;
 278
 279                 pnp_printf(buffer, pnp_resource_type_name(res));
 280
 281                 if (res->flags & IORESOURCE_DISABLED) {
 282                         pnp_printf(buffer, " disabled\n");
 283                         continue;
 284                 }
 285
 286                 switch (pnp_resource_type(res)) {
 287                 case IORESOURCE_IO:
 288                 case IORESOURCE_MEM:
 289                         pnp_printf(buffer, " %#llx-%#llx\n",
 290                                    (unsigned long long) res->start,
 291                                    (unsigned long long) res->end);
 292                         break;
 293                 case IORESOURCE_IRQ:
 294                 case IORESOURCE_DMA:
 295                         pnp_printf(buffer, " %lld\n",
 296                                    (unsigned long long) res->start);
 297                         break;
 298                 }
 299         }
 300
 301         ret = (buffer->curr - buf);
 302         kfree(buffer);
 303         return ret;
 304 }
 305
 306 static ssize_t pnp_set_current_resources(struct device *dmdev,
 307                                          struct device_attribute *attr,
 308                                          const char *ubuf, size_t count)
 309 {
 310         struct pnp_dev *dev = to_pnp_dev(dmdev);
 311         char *buf = (void *)ubuf;
 312         int retval = 0;
 313         resource_size_t start, end;
 314
 315         if (dev->status & PNP_ATTACHED) {
 316                 retval = -EBUSY;
 317                 dev_info(&dev->dev, "in use; can't configure\n");
 318                 goto done;
 319         }
 320
 321         while (isspace(*buf))
 322                 ++buf;
 323         if (!strnicmp(buf, "disable", 7)) {
 324                 retval = pnp_disable_dev(dev);
 325                 goto done;
 326         }
 327         if (!strnicmp(buf, "activate", 8)) {
 328                 retval = pnp_activate_dev(dev);
 329                 goto done;
 330         }
 331         if (!strnicmp(buf, "fill", 4)) {
 332                 if (dev->active)
 333                         goto done;
 334                 retval = pnp_auto_config_dev(dev);
 335                 goto done;
 336         }
 337         if (!strnicmp(buf, "auto", 4)) {
 338                 if (dev->active)
 339                         goto done;
 340                 pnp_init_resources(dev);
 341                 retval = pnp_auto_config_dev(dev);
 342                 goto done;
 343         }
 344         if (!strnicmp(buf, "clear", 5)) {
 345                 if (dev->active)
 346                         goto done;
 347                 pnp_init_resources(dev);
 348                 goto done;
 349         }
 350         if (!strnicmp(buf, "get", 3)) {
 351                 mutex_lock(&pnp_res_mutex);
 352                 if (pnp_can_read(dev))
 353                         dev->protocol->get(dev);
 354                 mutex_unlock(&pnp_res_mutex);
 355                 goto done;
 356         }
 357         if (!strnicmp(buf, "set", 3)) {
 358                 if (dev->active)
 359                         goto done;
 360                 buf += 3;
 361                 pnp_init_resources(dev);
 362                 mutex_lock(&pnp_res_mutex);
 363                 while (1) {
 364                         while (isspace(*buf))
 365                                 ++buf;
 366                         if (!strnicmp(buf, "io", 2)) {
 367                                 buf += 2;
 368                                 while (isspace(*buf))
 369                                         ++buf;
 370                                 start = simple_strtoul(buf, &buf, 0);
 371                                 while (isspace(*buf))
 372                                         ++buf;
 373                                 if (*buf == '-') {
 374                                         buf += 1;
 375                                         while (isspace(*buf))
 376                                                 ++buf;
 377                                         end = simple_strtoul(buf, &buf, 0);
 378                                 } else
 379                                         end = start;
 380                                 pnp_add_io_resource(dev, start, end, 0);
 381                                 continue;
 382                         }
 383                         if (!strnicmp(buf, "mem", 3)) {
 384                                 buf += 3;
 385                                 while (isspace(*buf))
 386                                         ++buf;
 387                                 start = simple_strtoul(buf, &buf, 0);
 388                                 while (isspace(*buf))
 389                                         ++buf;
 390                                 if (*buf == '-') {
 391                                         buf += 1;
 392                                         while (isspace(*buf))
 393                                                 ++buf;
 394                                         end = simple_strtoul(buf, &buf, 0);
 395                                 } else
 396                                         end = start;
 397                                 pnp_add_mem_resource(dev, start, end, 0);
 398                                 continue;
 399                         }
 400                         if (!strnicmp(buf, "irq", 3)) {
 401                                 buf += 3;
 402                                 while (isspace(*buf))
 403                                         ++buf;
 404                                 start = simple_strtoul(buf, &buf, 0);
 405                                 pnp_add_irq_resource(dev, start, 0);
 406                                 continue;
 407                         }
 408                         if (!strnicmp(buf, "dma", 3)) {
 409                                 buf += 3;
 410                                 while (isspace(*buf))
 411                                         ++buf;
 412                                 start = simple_strtoul(buf, &buf, 0);
 413                                 pnp_add_dma_resource(dev, start, 0);
 414                                 continue;
 415                         }
 416                         break;
 417                 }
 418                 mutex_unlock(&pnp_res_mutex);
 419                 goto done;
 420         }
 421
 422 done:
 423         if (retval < 0)
 424                 return retval;
 425         return count;
 426 }
 427
 428 static DEVICE_ATTR(resources, S_IRUGO | S_IWUSR,
 429                    pnp_show_current_resources, pnp_set_current_resources);
 430
 431 static ssize_t pnp_show_current_ids(struct device *dmdev,
 432                                     struct device_attribute *attr, char *buf)
 433 {
 434         char *str = buf;
 435         struct pnp_dev *dev = to_pnp_dev(dmdev);
 436         struct pnp_id *pos = dev->id;
 437
 438         while (pos) {
 439                 str += sprintf(str, "%s\n", pos->id);
 440                 pos = pos->next;
 441         }
 442         return (str - buf);
 443 }
 444
 445 static DEVICE_ATTR(id, S_IRUGO, pnp_show_current_ids, NULL);
 446
 447 int pnp_interface_attach_device(struct pnp_dev *dev)
 448 {
 449         int rc = device_create_file(&dev->dev, &dev_attr_options);
 450
 451         if (rc)
 452                 goto err;
 453         rc = device_create_file(&dev->dev, &dev_attr_resources);
 454         if (rc)
 455                 goto err_opt;
 456         rc = device_create_file(&dev->dev, &dev_attr_id);
 457         if (rc)
 458                 goto err_res;
 459
 460         return 0;
 461
 462 err_res:
 463         device_remove_file(&dev->dev, &dev_attr_resources);
 464 err_opt:
 465         device_remove_file(&dev->dev, &dev_attr_options);
 466 err:
 467         return rc;
 468 }