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