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  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
   7  *      Bjorn Helgaas <bjorn.helgaas@hp.com>
   8  */
   9
  10 #include <linux/pnp.h>
  11 #include <linux/string.h>
  12 #include <linux/errno.h>
  13 #include <linux/list.h>
  14 #include <linux/types.h>
  15 #include <linux/pnp.h>
  16 #include <linux/stat.h>
  17 #include <linux/ctype.h>
  18 #include <linux/slab.h>
  19 #include <linux/mutex.h>
  20
  21 #include <asm/uaccess.h>
  22
  23 #include "base.h"
  24
  25 struct pnp_info_buffer {
  26         char *buffer;           /* pointer to begin of buffer */
  27         char *curr;             /* current position in buffer */
  28         unsigned long size;     /* current size */
  29         unsigned long len;      /* total length of buffer */
  30         int stop;               /* stop flag */
  31         int error;              /* error code */
  32 };
  33
  34 typedef struct pnp_info_buffer pnp_info_buffer_t;
  35
  36 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
  37 {
  38         va_list args;
  39         int res;
  40
  41         if (buffer->stop || buffer->error)
  42                 return 0;
  43         va_start(args, fmt);
  44         res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
  45         va_end(args);
  46         if (buffer->size + res >= buffer->len) {
  47                 buffer->stop = 1;
  48                 return 0;
  49         }
  50         buffer->curr += res;
  51         buffer->size += res;
  52         return res;
  53 }
  54
  55 static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
  56                            struct pnp_port *port)
  57 {
  58         pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
  59                    "%i-bit address decoding\n", space,
  60                    (unsigned long long) port->min,
  61                    (unsigned long long) port->max,
  62                    port->align ? ((unsigned long long) port->align - 1) : 0,
  63                    (unsigned long long) port->size,
  64                    port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
  65 }
  66
  67 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
  68                           struct pnp_irq *irq)
  69 {
  70         int first = 1, i;
  71
  72         pnp_printf(buffer, "%sirq ", space);
  73         for (i = 0; i < PNP_IRQ_NR; i++)
  74                 if (test_bit(i, irq->map.bits)) {
  75                         if (!first) {
  76                                 pnp_printf(buffer, ",");
  77                         } else {
  78                                 first = 0;
  79                         }
  80                         if (i == 2 || i == 9)
  81                                 pnp_printf(buffer, "2/9");
  82                         else
  83                                 pnp_printf(buffer, "%i", i);
  84                 }
  85         if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
  86                 pnp_printf(buffer, "<none>");
  87         if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
  88                 pnp_printf(buffer, " High-Edge");
  89         if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
  90                 pnp_printf(buffer, " Low-Edge");
  91         if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
  92                 pnp_printf(buffer, " High-Level");
  93         if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
  94                 pnp_printf(buffer, " Low-Level");
  95         if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
  96                 pnp_printf(buffer, " (optional)");
  97         pnp_printf(buffer, "\n");
  98 }
  99
 100 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
 101                           struct pnp_dma *dma)
 102 {
 103         int first = 1, i;
 104         char *s;
 105
 106         pnp_printf(buffer, "%sdma ", space);
 107         for (i = 0; i < 8; i++)
 108                 if (dma->map & (1 << i)) {
 109                         if (!first) {
 110                                 pnp_printf(buffer, ",");
 111                         } else {
 112                                 first = 0;
 113                         }
 114                         pnp_printf(buffer, "%i", i);
 115                 }
 116         if (!dma->map)
 117                 pnp_printf(buffer, "<none>");
 118         switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
 119         case IORESOURCE_DMA_8BIT:
 120                 s = "8-bit";
 121                 break;
 122         case IORESOURCE_DMA_8AND16BIT:
 123                 s = "8-bit&16-bit";
 124                 break;
 125         default:
 126                 s = "16-bit";
 127         }
 128         pnp_printf(buffer, " %s", s);
 129         if (dma->flags & IORESOURCE_DMA_MASTER)
 130                 pnp_printf(buffer, " master");
 131         if (dma->flags & IORESOURCE_DMA_BYTE)
 132                 pnp_printf(buffer, " byte-count");
 133         if (dma->flags & IORESOURCE_DMA_WORD)
 134                 pnp_printf(buffer, " word-count");
 135         switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
 136         case IORESOURCE_DMA_TYPEA:
 137                 s = "type-A";
 138                 break;
 139         case IORESOURCE_DMA_TYPEB:
 140                 s = "type-B";
 141                 break;
 142         case IORESOURCE_DMA_TYPEF:
 143                 s = "type-F";
 144                 break;
 145         default:
 146                 s = "compatible";
 147                 break;
 148         }
 149         pnp_printf(buffer, " %s\n", s);
 150 }
 151
 152 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
 153                           struct pnp_mem *mem)
 154 {
 155         char *s;
 156
 157         pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
 158                    space, (unsigned long long) mem->min,
 159                    (unsigned long long) mem->max,
 160                    (unsigned long long) mem->align,
 161                    (unsigned long long) mem->size);
 162         if (mem->flags & IORESOURCE_MEM_WRITEABLE)
 163                 pnp_printf(buffer, ", writeable");
 164         if (mem->flags & IORESOURCE_MEM_CACHEABLE)
 165                 pnp_printf(buffer, ", cacheable");
 166         if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
 167                 pnp_printf(buffer, ", range-length");
 168         if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
 169                 pnp_printf(buffer, ", shadowable");
 170         if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
 171                 pnp_printf(buffer, ", expansion ROM");
 172         switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
 173         case IORESOURCE_MEM_8BIT:
 174                 s = "8-bit";
 175                 break;
 176         case IORESOURCE_MEM_8AND16BIT:
 177                 s = "8-bit&16-bit";
 178                 break;
 179         case IORESOURCE_MEM_32BIT:
 180                 s = "32-bit";
 181                 break;
 182         default:
 183                 s = "16-bit";
 184         }
 185         pnp_printf(buffer, ", %s\n", s);
 186 }
 187
 188 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
 189                              struct pnp_option *option)
 190 {
 191         switch (option->type) {
 192         case IORESOURCE_IO:
 193                 pnp_print_port(buffer, space, &option->u.port);
 194                 break;
 195         case IORESOURCE_MEM:
 196                 pnp_print_mem(buffer, space, &option->u.mem);
 197                 break;
 198         case IORESOURCE_IRQ:
 199                 pnp_print_irq(buffer, space, &option->u.irq);
 200                 break;
 201         case IORESOURCE_DMA:
 202                 pnp_print_dma(buffer, space, &option->u.dma);
 203                 break;
 204         }
 205 }
 206
 207 static ssize_t pnp_show_options(struct device *dmdev,
 208                                 struct device_attribute *attr, char *buf)
 209 {
 210         struct pnp_dev *dev = to_pnp_dev(dmdev);
 211         pnp_info_buffer_t *buffer;
 212         struct pnp_option *option;
 213         int ret, dep = 0, set = 0;
 214         char *indent;
 215
 216         buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
 217         if (!buffer)
 218                 return -ENOMEM;
 219
 220         buffer->len = PAGE_SIZE;
 221         buffer->buffer = buf;
 222         buffer->curr = buffer->buffer;
 223
 224         list_for_each_entry(option, &dev->options, list) {
 225                 if (pnp_option_is_dependent(option)) {
 226                         indent = "  ";
 227                         if (!dep || pnp_option_set(option) != set) {
 228                                 set = pnp_option_set(option);
 229                                 dep = 1;
 230                                 pnp_printf(buffer, "Dependent: %02i - "
 231                                            "Priority %s\n", set,
 232                                            pnp_option_priority_name(option));
 233                         }
 234                 } else {
 235                         dep = 0;
 236                         indent = "";
 237                 }
 238                 pnp_print_option(buffer, indent, option);
 239         }
 240
 241         ret = (buffer->curr - buf);
 242         kfree(buffer);
 243         return ret;
 244 }
 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 ssize_t pnp_show_current_ids(struct device *dmdev,
 422                                     struct device_attribute *attr, char *buf)
 423 {
 424         char *str = buf;
 425         struct pnp_dev *dev = to_pnp_dev(dmdev);
 426         struct pnp_id *pos = dev->id;
 427
 428         while (pos) {
 429                 str += sprintf(str, "%s\n", pos->id);
 430                 pos = pos->next;
 431         }
 432         return (str - buf);
 433 }
 434
 435 struct device_attribute pnp_interface_attrs[] = {
 436         __ATTR(resources, S_IRUGO | S_IWUSR,
 437                    pnp_show_current_resources,
 438                    pnp_set_current_resources),
 439         __ATTR(options, S_IRUGO, pnp_show_options, NULL),
 440         __ATTR(id, S_IRUGO, pnp_show_current_ids, NULL),
 441         __ATTR_NULL,
 442 };