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 DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL); 247 248 static ssize_t pnp_show_current_resources(struct device *dmdev, 249 struct device_attribute *attr, 250 char *buf) 251 { 252 struct pnp_dev *dev = to_pnp_dev(dmdev); 253 pnp_info_buffer_t *buffer; 254 struct pnp_resource *pnp_res; 255 struct resource *res; 256 int ret; 257 258 if (!dev) 259 return -EINVAL; 260 261 buffer = pnp_alloc(sizeof(pnp_info_buffer_t)); 262 if (!buffer) 263 return -ENOMEM; 264 265 buffer->len = PAGE_SIZE; 266 buffer->buffer = buf; 267 buffer->curr = buffer->buffer; 268 269 pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled"); 270 271 list_for_each_entry(pnp_res, &dev->resources, list) { 272 res = &pnp_res->res; 273 274 pnp_printf(buffer, pnp_resource_type_name(res)); 275 276 if (res->flags & IORESOURCE_DISABLED) { 277 pnp_printf(buffer, " disabled\n"); 278 continue; 279 } 280 281 switch (pnp_resource_type(res)) { 282 case IORESOURCE_IO: 283 case IORESOURCE_MEM: 284 pnp_printf(buffer, " %#llx-%#llx\n", 285 (unsigned long long) res->start, 286 (unsigned long long) res->end); 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 ssize_t pnp_set_current_resources(struct device *dmdev, 302 struct device_attribute *attr, 303 const char *ubuf, size_t count) 304 { 305 struct pnp_dev *dev = to_pnp_dev(dmdev); 306 char *buf = (void *)ubuf; 307 int retval = 0; 308 resource_size_t start, end; 309 310 if (dev->status & PNP_ATTACHED) { 311 retval = -EBUSY; 312 dev_info(&dev->dev, "in use; can't configure\n"); 313 goto done; 314 } 315 316 while (isspace(*buf)) 317 ++buf; 318 if (!strnicmp(buf, "disable", 7)) { 319 retval = pnp_disable_dev(dev); 320 goto done; 321 } 322 if (!strnicmp(buf, "activate", 8)) { 323 retval = pnp_activate_dev(dev); 324 goto done; 325 } 326 if (!strnicmp(buf, "fill", 4)) { 327 if (dev->active) 328 goto done; 329 retval = pnp_auto_config_dev(dev); 330 goto done; 331 } 332 if (!strnicmp(buf, "auto", 4)) { 333 if (dev->active) 334 goto done; 335 pnp_init_resources(dev); 336 retval = pnp_auto_config_dev(dev); 337 goto done; 338 } 339 if (!strnicmp(buf, "clear", 5)) { 340 if (dev->active) 341 goto done; 342 pnp_init_resources(dev); 343 goto done; 344 } 345 if (!strnicmp(buf, "get", 3)) { 346 mutex_lock(&pnp_res_mutex); 347 if (pnp_can_read(dev)) 348 dev->protocol->get(dev); 349 mutex_unlock(&pnp_res_mutex); 350 goto done; 351 } 352 if (!strnicmp(buf, "set", 3)) { 353 if (dev->active) 354 goto done; 355 buf += 3; 356 pnp_init_resources(dev); 357 mutex_lock(&pnp_res_mutex); 358 while (1) { 359 while (isspace(*buf)) 360 ++buf; 361 if (!strnicmp(buf, "io", 2)) { 362 buf += 2; 363 while (isspace(*buf)) 364 ++buf; 365 start = simple_strtoul(buf, &buf, 0); 366 while (isspace(*buf)) 367 ++buf; 368 if (*buf == '-') { 369 buf += 1; 370 while (isspace(*buf)) 371 ++buf; 372 end = simple_strtoul(buf, &buf, 0); 373 } else 374 end = start; 375 pnp_add_io_resource(dev, start, end, 0); 376 continue; 377 } 378 if (!strnicmp(buf, "mem", 3)) { 379 buf += 3; 380 while (isspace(*buf)) 381 ++buf; 382 start = simple_strtoul(buf, &buf, 0); 383 while (isspace(*buf)) 384 ++buf; 385 if (*buf == '-') { 386 buf += 1; 387 while (isspace(*buf)) 388 ++buf; 389 end = simple_strtoul(buf, &buf, 0); 390 } else 391 end = start; 392 pnp_add_mem_resource(dev, start, end, 0); 393 continue; 394 } 395 if (!strnicmp(buf, "irq", 3)) { 396 buf += 3; 397 while (isspace(*buf)) 398 ++buf; 399 start = simple_strtoul(buf, &buf, 0); 400 pnp_add_irq_resource(dev, start, 0); 401 continue; 402 } 403 if (!strnicmp(buf, "dma", 3)) { 404 buf += 3; 405 while (isspace(*buf)) 406 ++buf; 407 start = simple_strtoul(buf, &buf, 0); 408 pnp_add_dma_resource(dev, start, 0); 409 continue; 410 } 411 break; 412 } 413 mutex_unlock(&pnp_res_mutex); 414 goto done; 415 } 416 417 done: 418 if (retval < 0) 419 return retval; 420 return count; 421 } 422 423 static DEVICE_ATTR(resources, S_IRUGO | S_IWUSR, 424 pnp_show_current_resources, pnp_set_current_resources); 425 426 static ssize_t pnp_show_current_ids(struct device *dmdev, 427 struct device_attribute *attr, char *buf) 428 { 429 char *str = buf; 430 struct pnp_dev *dev = to_pnp_dev(dmdev); 431 struct pnp_id *pos = dev->id; 432 433 while (pos) { 434 str += sprintf(str, "%s\n", pos->id); 435 pos = pos->next; 436 } 437 return (str - buf); 438 } 439 440 static DEVICE_ATTR(id, S_IRUGO, pnp_show_current_ids, NULL); 441 442 int pnp_interface_attach_device(struct pnp_dev *dev) 443 { 444 int rc = device_create_file(&dev->dev, &dev_attr_options); 445 446 if (rc) 447 goto err; 448 rc = device_create_file(&dev->dev, &dev_attr_resources); 449 if (rc) 450 goto err_opt; 451 rc = device_create_file(&dev->dev, &dev_attr_id); 452 if (rc) 453 goto err_res; 454 455 return 0; 456 457 err_res: 458 device_remove_file(&dev->dev, &dev_attr_resources); 459 err_opt: 460 device_remove_file(&dev->dev, &dev_attr_options); 461 err: 462 return rc; 463 } 464