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