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 }; 443