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/stat.h> 16 #include <linux/ctype.h> 17 #include <linux/slab.h> 18 #include <linux/mutex.h> 19 20 #include <linux/uaccess.h> 21 22 #include "base.h" 23 24 struct pnp_info_buffer { 25 char *buffer; /* pointer to begin of buffer */ 26 char *curr; /* current position in buffer */ 27 unsigned long size; /* current size */ 28 unsigned long len; /* total length of buffer */ 29 int stop; /* stop flag */ 30 int error; /* error code */ 31 }; 32 33 typedef struct pnp_info_buffer pnp_info_buffer_t; 34 35 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...) 36 { 37 va_list args; 38 int res; 39 40 if (buffer->stop || buffer->error) 41 return 0; 42 va_start(args, fmt); 43 res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args); 44 va_end(args); 45 if (buffer->size + res >= buffer->len) { 46 buffer->stop = 1; 47 return 0; 48 } 49 buffer->curr += res; 50 buffer->size += res; 51 return res; 52 } 53 54 static void pnp_print_port(pnp_info_buffer_t * buffer, char *space, 55 struct pnp_port *port) 56 { 57 pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, " 58 "%i-bit address decoding\n", space, 59 (unsigned long long) port->min, 60 (unsigned long long) port->max, 61 port->align ? ((unsigned long long) port->align - 1) : 0, 62 (unsigned long long) port->size, 63 port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10); 64 } 65 66 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space, 67 struct pnp_irq *irq) 68 { 69 int first = 1, i; 70 71 pnp_printf(buffer, "%sirq ", space); 72 for (i = 0; i < PNP_IRQ_NR; i++) 73 if (test_bit(i, irq->map.bits)) { 74 if (!first) { 75 pnp_printf(buffer, ","); 76 } else { 77 first = 0; 78 } 79 if (i == 2 || i == 9) 80 pnp_printf(buffer, "2/9"); 81 else 82 pnp_printf(buffer, "%i", i); 83 } 84 if (bitmap_empty(irq->map.bits, PNP_IRQ_NR)) 85 pnp_printf(buffer, "<none>"); 86 if (irq->flags & IORESOURCE_IRQ_HIGHEDGE) 87 pnp_printf(buffer, " High-Edge"); 88 if (irq->flags & IORESOURCE_IRQ_LOWEDGE) 89 pnp_printf(buffer, " Low-Edge"); 90 if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL) 91 pnp_printf(buffer, " High-Level"); 92 if (irq->flags & IORESOURCE_IRQ_LOWLEVEL) 93 pnp_printf(buffer, " Low-Level"); 94 if (irq->flags & IORESOURCE_IRQ_OPTIONAL) 95 pnp_printf(buffer, " (optional)"); 96 pnp_printf(buffer, "\n"); 97 } 98 99 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space, 100 struct pnp_dma *dma) 101 { 102 int first = 1, i; 103 char *s; 104 105 pnp_printf(buffer, "%sdma ", space); 106 for (i = 0; i < 8; i++) 107 if (dma->map & (1 << i)) { 108 if (!first) { 109 pnp_printf(buffer, ","); 110 } else { 111 first = 0; 112 } 113 pnp_printf(buffer, "%i", i); 114 } 115 if (!dma->map) 116 pnp_printf(buffer, "<none>"); 117 switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) { 118 case IORESOURCE_DMA_8BIT: 119 s = "8-bit"; 120 break; 121 case IORESOURCE_DMA_8AND16BIT: 122 s = "8-bit&16-bit"; 123 break; 124 default: 125 s = "16-bit"; 126 } 127 pnp_printf(buffer, " %s", s); 128 if (dma->flags & IORESOURCE_DMA_MASTER) 129 pnp_printf(buffer, " master"); 130 if (dma->flags & IORESOURCE_DMA_BYTE) 131 pnp_printf(buffer, " byte-count"); 132 if (dma->flags & IORESOURCE_DMA_WORD) 133 pnp_printf(buffer, " word-count"); 134 switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) { 135 case IORESOURCE_DMA_TYPEA: 136 s = "type-A"; 137 break; 138 case IORESOURCE_DMA_TYPEB: 139 s = "type-B"; 140 break; 141 case IORESOURCE_DMA_TYPEF: 142 s = "type-F"; 143 break; 144 default: 145 s = "compatible"; 146 break; 147 } 148 pnp_printf(buffer, " %s\n", s); 149 } 150 151 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space, 152 struct pnp_mem *mem) 153 { 154 char *s; 155 156 pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx", 157 space, (unsigned long long) mem->min, 158 (unsigned long long) mem->max, 159 (unsigned long long) mem->align, 160 (unsigned long long) mem->size); 161 if (mem->flags & IORESOURCE_MEM_WRITEABLE) 162 pnp_printf(buffer, ", writeable"); 163 if (mem->flags & IORESOURCE_MEM_CACHEABLE) 164 pnp_printf(buffer, ", cacheable"); 165 if (mem->flags & IORESOURCE_MEM_RANGELENGTH) 166 pnp_printf(buffer, ", range-length"); 167 if (mem->flags & IORESOURCE_MEM_SHADOWABLE) 168 pnp_printf(buffer, ", shadowable"); 169 if (mem->flags & IORESOURCE_MEM_EXPANSIONROM) 170 pnp_printf(buffer, ", expansion ROM"); 171 switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) { 172 case IORESOURCE_MEM_8BIT: 173 s = "8-bit"; 174 break; 175 case IORESOURCE_MEM_8AND16BIT: 176 s = "8-bit&16-bit"; 177 break; 178 case IORESOURCE_MEM_32BIT: 179 s = "32-bit"; 180 break; 181 default: 182 s = "16-bit"; 183 } 184 pnp_printf(buffer, ", %s\n", s); 185 } 186 187 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space, 188 struct pnp_option *option) 189 { 190 switch (option->type) { 191 case IORESOURCE_IO: 192 pnp_print_port(buffer, space, &option->u.port); 193 break; 194 case IORESOURCE_MEM: 195 pnp_print_mem(buffer, space, &option->u.mem); 196 break; 197 case IORESOURCE_IRQ: 198 pnp_print_irq(buffer, space, &option->u.irq); 199 break; 200 case IORESOURCE_DMA: 201 pnp_print_dma(buffer, space, &option->u.dma); 202 break; 203 } 204 } 205 206 static ssize_t options_show(struct device *dmdev, struct device_attribute *attr, 207 char *buf) 208 { 209 struct pnp_dev *dev = to_pnp_dev(dmdev); 210 pnp_info_buffer_t *buffer; 211 struct pnp_option *option; 212 int ret, dep = 0, set = 0; 213 char *indent; 214 215 buffer = pnp_alloc(sizeof(pnp_info_buffer_t)); 216 if (!buffer) 217 return -ENOMEM; 218 219 buffer->len = PAGE_SIZE; 220 buffer->buffer = buf; 221 buffer->curr = buffer->buffer; 222 223 list_for_each_entry(option, &dev->options, list) { 224 if (pnp_option_is_dependent(option)) { 225 indent = " "; 226 if (!dep || pnp_option_set(option) != set) { 227 set = pnp_option_set(option); 228 dep = 1; 229 pnp_printf(buffer, "Dependent: %02i - " 230 "Priority %s\n", set, 231 pnp_option_priority_name(option)); 232 } 233 } else { 234 dep = 0; 235 indent = ""; 236 } 237 pnp_print_option(buffer, indent, option); 238 } 239 240 ret = (buffer->curr - buf); 241 kfree(buffer); 242 return ret; 243 } 244 static DEVICE_ATTR_RO(options); 245 246 static ssize_t resources_show(struct device *dmdev, 247 struct device_attribute *attr, char *buf) 248 { 249 struct pnp_dev *dev = to_pnp_dev(dmdev); 250 pnp_info_buffer_t *buffer; 251 struct pnp_resource *pnp_res; 252 struct resource *res; 253 int ret; 254 255 if (!dev) 256 return -EINVAL; 257 258 buffer = pnp_alloc(sizeof(pnp_info_buffer_t)); 259 if (!buffer) 260 return -ENOMEM; 261 262 buffer->len = PAGE_SIZE; 263 buffer->buffer = buf; 264 buffer->curr = buffer->buffer; 265 266 pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled"); 267 268 list_for_each_entry(pnp_res, &dev->resources, list) { 269 res = &pnp_res->res; 270 271 pnp_printf(buffer, pnp_resource_type_name(res)); 272 273 if (res->flags & IORESOURCE_DISABLED) { 274 pnp_printf(buffer, " disabled\n"); 275 continue; 276 } 277 278 switch (pnp_resource_type(res)) { 279 case IORESOURCE_IO: 280 case IORESOURCE_MEM: 281 case IORESOURCE_BUS: 282 pnp_printf(buffer, " %#llx-%#llx%s\n", 283 (unsigned long long) res->start, 284 (unsigned long long) res->end, 285 res->flags & IORESOURCE_WINDOW ? 286 " window" : ""); 287 break; 288 case IORESOURCE_IRQ: 289 case IORESOURCE_DMA: 290 pnp_printf(buffer, " %lld\n", 291 (unsigned long long) res->start); 292 break; 293 } 294 } 295 296 ret = (buffer->curr - buf); 297 kfree(buffer); 298 return ret; 299 } 300 301 static char *pnp_get_resource_value(char *buf, 302 unsigned long type, 303 resource_size_t *start, 304 resource_size_t *end, 305 unsigned long *flags) 306 { 307 if (start) 308 *start = 0; 309 if (end) 310 *end = 0; 311 if (flags) 312 *flags = 0; 313 314 /* TBD: allow for disabled resources */ 315 316 buf = skip_spaces(buf); 317 if (start) { 318 *start = simple_strtoull(buf, &buf, 0); 319 if (end) { 320 buf = skip_spaces(buf); 321 if (*buf == '-') { 322 buf = skip_spaces(buf + 1); 323 *end = simple_strtoull(buf, &buf, 0); 324 } else 325 *end = *start; 326 } 327 } 328 329 /* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */ 330 331 return buf; 332 } 333 334 static ssize_t resources_store(struct device *dmdev, 335 struct device_attribute *attr, const char *ubuf, 336 size_t count) 337 { 338 struct pnp_dev *dev = to_pnp_dev(dmdev); 339 char *buf = (void *)ubuf; 340 int retval = 0; 341 342 if (dev->status & PNP_ATTACHED) { 343 retval = -EBUSY; 344 dev_info(&dev->dev, "in use; can't configure\n"); 345 goto done; 346 } 347 348 buf = skip_spaces(buf); 349 if (!strncasecmp(buf, "disable", 7)) { 350 retval = pnp_disable_dev(dev); 351 goto done; 352 } 353 if (!strncasecmp(buf, "activate", 8)) { 354 retval = pnp_activate_dev(dev); 355 goto done; 356 } 357 if (!strncasecmp(buf, "fill", 4)) { 358 if (dev->active) 359 goto done; 360 retval = pnp_auto_config_dev(dev); 361 goto done; 362 } 363 if (!strncasecmp(buf, "auto", 4)) { 364 if (dev->active) 365 goto done; 366 pnp_init_resources(dev); 367 retval = pnp_auto_config_dev(dev); 368 goto done; 369 } 370 if (!strncasecmp(buf, "clear", 5)) { 371 if (dev->active) 372 goto done; 373 pnp_init_resources(dev); 374 goto done; 375 } 376 if (!strncasecmp(buf, "get", 3)) { 377 mutex_lock(&pnp_res_mutex); 378 if (pnp_can_read(dev)) 379 dev->protocol->get(dev); 380 mutex_unlock(&pnp_res_mutex); 381 goto done; 382 } 383 if (!strncasecmp(buf, "set", 3)) { 384 resource_size_t start; 385 resource_size_t end; 386 unsigned long flags; 387 388 if (dev->active) 389 goto done; 390 buf += 3; 391 pnp_init_resources(dev); 392 mutex_lock(&pnp_res_mutex); 393 while (1) { 394 buf = skip_spaces(buf); 395 if (!strncasecmp(buf, "io", 2)) { 396 buf = pnp_get_resource_value(buf + 2, 397 IORESOURCE_IO, 398 &start, &end, 399 &flags); 400 pnp_add_io_resource(dev, start, end, flags); 401 } else if (!strncasecmp(buf, "mem", 3)) { 402 buf = pnp_get_resource_value(buf + 3, 403 IORESOURCE_MEM, 404 &start, &end, 405 &flags); 406 pnp_add_mem_resource(dev, start, end, flags); 407 } else if (!strncasecmp(buf, "irq", 3)) { 408 buf = pnp_get_resource_value(buf + 3, 409 IORESOURCE_IRQ, 410 &start, NULL, 411 &flags); 412 pnp_add_irq_resource(dev, start, flags); 413 } else if (!strncasecmp(buf, "dma", 3)) { 414 buf = pnp_get_resource_value(buf + 3, 415 IORESOURCE_DMA, 416 &start, NULL, 417 &flags); 418 pnp_add_dma_resource(dev, start, flags); 419 } else if (!strncasecmp(buf, "bus", 3)) { 420 buf = pnp_get_resource_value(buf + 3, 421 IORESOURCE_BUS, 422 &start, &end, 423 NULL); 424 pnp_add_bus_resource(dev, start, end); 425 } else 426 break; 427 } 428 mutex_unlock(&pnp_res_mutex); 429 goto done; 430 } 431 432 done: 433 if (retval < 0) 434 return retval; 435 return count; 436 } 437 static DEVICE_ATTR_RW(resources); 438 439 static ssize_t id_show(struct device *dmdev, struct device_attribute *attr, 440 char *buf) 441 { 442 char *str = buf; 443 struct pnp_dev *dev = to_pnp_dev(dmdev); 444 struct pnp_id *pos = dev->id; 445 446 while (pos) { 447 str += sprintf(str, "%s\n", pos->id); 448 pos = pos->next; 449 } 450 return (str - buf); 451 } 452 static DEVICE_ATTR_RO(id); 453 454 static struct attribute *pnp_dev_attrs[] = { 455 &dev_attr_resources.attr, 456 &dev_attr_options.attr, 457 &dev_attr_id.attr, 458 NULL, 459 }; 460 461 static const struct attribute_group pnp_dev_group = { 462 .attrs = pnp_dev_attrs, 463 }; 464 465 const struct attribute_group *pnp_dev_groups[] = { 466 &pnp_dev_group, 467 NULL, 468 }; 469