drivers/pnp/quirks.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  This file contains quirk handling code for PnP devices
   4  *  Some devices do not report all their resources, and need to have extra
   5  *  resources added. This is most easily accomplished at initialisation time
   6  *  when building up the resource structure for the first time.
   7  *
   8  *  Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
   9  *  Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
  10  *      Bjorn Helgaas <bjorn.helgaas@hp.com>
  11  *
  12  *  Heavily based on PCI quirks handling which is
  13  *
  14  *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
  15  */
  16
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/pci.h>
  20 #include <linux/string.h>
  21 #include <linux/slab.h>
  22 #include <linux/pnp.h>
  23 #include <linux/io.h>
  24 #include <linux/kallsyms.h>
  25 #include "base.h"
  26
  27 static void quirk_awe32_add_ports(struct pnp_dev *dev,
  28                                   struct pnp_option *option,
  29                                   unsigned int offset)
  30 {
  31         struct pnp_option *new_option;
  32
  33         new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL);
  34         if (!new_option) {
  35                 dev_err(&dev->dev, "couldn't add ioport region to option set "
  36                         "%d\n", pnp_option_set(option));
  37                 return;
  38         }
  39
  40         *new_option = *option;
  41         new_option->u.port.min += offset;
  42         new_option->u.port.max += offset;
  43         list_add(&new_option->list, &option->list);
  44
  45         dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n",
  46                 (unsigned long long) new_option->u.port.min,
  47                 (unsigned long long) new_option->u.port.max,
  48                 pnp_option_set(option));
  49 }
  50
  51 static void quirk_awe32_resources(struct pnp_dev *dev)
  52 {
  53         struct pnp_option *option;
  54         unsigned int set = ~0;
  55
  56         /*
  57          * Add two extra ioport regions (at offset 0x400 and 0x800 from the
  58          * one given) to every dependent option set.
  59          */
  60         list_for_each_entry(option, &dev->options, list) {
  61                 if (pnp_option_is_dependent(option) &&
  62                     pnp_option_set(option) != set) {
  63                         set = pnp_option_set(option);
  64                         quirk_awe32_add_ports(dev, option, 0x800);
  65                         quirk_awe32_add_ports(dev, option, 0x400);
  66                 }
  67         }
  68 }
  69
  70 static void quirk_cmi8330_resources(struct pnp_dev *dev)
  71 {
  72         struct pnp_option *option;
  73         struct pnp_irq *irq;
  74         struct pnp_dma *dma;
  75
  76         list_for_each_entry(option, &dev->options, list) {
  77                 if (!pnp_option_is_dependent(option))
  78                         continue;
  79
  80                 if (option->type == IORESOURCE_IRQ) {
  81                         irq = &option->u.irq;
  82                         bitmap_zero(irq->map.bits, PNP_IRQ_NR);
  83                         __set_bit(5, irq->map.bits);
  84                         __set_bit(7, irq->map.bits);
  85                         __set_bit(10, irq->map.bits);
  86                         dev_info(&dev->dev, "set possible IRQs in "
  87                                  "option set %d to 5, 7, 10\n",
  88                                  pnp_option_set(option));
  89                 } else if (option->type == IORESOURCE_DMA) {
  90                         dma = &option->u.dma;
  91                         if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
  92                                                 IORESOURCE_DMA_8BIT &&
  93                             dma->map != 0x0A) {
  94                                 dev_info(&dev->dev, "changing possible "
  95                                          "DMA channel mask in option set %d "
  96                                          "from %#02x to 0x0A (1, 3)\n",
  97                                          pnp_option_set(option), dma->map);
  98                                 dma->map = 0x0A;
  99                         }
 100                 }
 101         }
 102 }
 103
 104 static void quirk_sb16audio_resources(struct pnp_dev *dev)
 105 {
 106         struct pnp_option *option;
 107         unsigned int prev_option_flags = ~0, n = 0;
 108         struct pnp_port *port;
 109
 110         /*
 111          * The default range on the OPL port for these devices is 0x388-0x388.
 112          * Here we increase that range so that two such cards can be
 113          * auto-configured.
 114          */
 115         list_for_each_entry(option, &dev->options, list) {
 116                 if (prev_option_flags != option->flags) {
 117                         prev_option_flags = option->flags;
 118                         n = 0;
 119                 }
 120
 121                 if (pnp_option_is_dependent(option) &&
 122                     option->type == IORESOURCE_IO) {
 123                         n++;
 124                         port = &option->u.port;
 125                         if (n == 3 && port->min == port->max) {
 126                                 port->max += 0x70;
 127                                 dev_info(&dev->dev, "increased option port "
 128                                          "range from %#llx-%#llx to "
 129                                          "%#llx-%#llx\n",
 130                                          (unsigned long long) port->min,
 131                                          (unsigned long long) port->min,
 132                                          (unsigned long long) port->min,
 133                                          (unsigned long long) port->max);
 134                         }
 135                 }
 136         }
 137 }
 138
 139 static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev,
 140                                                   unsigned int set)
 141 {
 142         struct pnp_option *tail = NULL, *first_new_option = NULL;
 143         struct pnp_option *option, *new_option;
 144         unsigned int flags;
 145
 146         list_for_each_entry(option, &dev->options, list) {
 147                 if (pnp_option_is_dependent(option))
 148                         tail = option;
 149         }
 150         if (!tail) {
 151                 dev_err(&dev->dev, "no dependent option sets\n");
 152                 return NULL;
 153         }
 154
 155         flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL);
 156         list_for_each_entry(option, &dev->options, list) {
 157                 if (pnp_option_is_dependent(option) &&
 158                     pnp_option_set(option) == set) {
 159                         new_option = kmalloc(sizeof(struct pnp_option),
 160                                              GFP_KERNEL);
 161                         if (!new_option) {
 162                                 dev_err(&dev->dev, "couldn't clone dependent "
 163                                         "set %d\n", set);
 164                                 return NULL;
 165                         }
 166
 167                         *new_option = *option;
 168                         new_option->flags = flags;
 169                         if (!first_new_option)
 170                                 first_new_option = new_option;
 171
 172                         list_add(&new_option->list, &tail->list);
 173                         tail = new_option;
 174                 }
 175         }
 176
 177         return first_new_option;
 178 }
 179
 180
 181 static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev)
 182 {
 183         struct pnp_option *new_option;
 184         unsigned int num_sets, i, set;
 185         struct pnp_irq *irq;
 186
 187         num_sets = dev->num_dependent_sets;
 188         for (i = 0; i < num_sets; i++) {
 189                 new_option = pnp_clone_dependent_set(dev, i);
 190                 if (!new_option)
 191                         return;
 192
 193                 set = pnp_option_set(new_option);
 194                 while (new_option && pnp_option_set(new_option) == set) {
 195                         if (new_option->type == IORESOURCE_IRQ) {
 196                                 irq = &new_option->u.irq;
 197                                 irq->flags |= IORESOURCE_IRQ_OPTIONAL;
 198                         }
 199                         dbg_pnp_show_option(dev, new_option);
 200                         new_option = list_entry(new_option->list.next,
 201                                                 struct pnp_option, list);
 202                 }
 203
 204                 dev_info(&dev->dev, "added dependent option set %d (same as "
 205                          "set %d except IRQ optional)\n", set, i);
 206         }
 207 }
 208
 209 static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
 210 {
 211         struct pnp_option *option;
 212         struct pnp_irq *irq = NULL;
 213         unsigned int independent_irqs = 0;
 214
 215         list_for_each_entry(option, &dev->options, list) {
 216                 if (option->type == IORESOURCE_IRQ &&
 217                     !pnp_option_is_dependent(option)) {
 218                         independent_irqs++;
 219                         irq = &option->u.irq;
 220                 }
 221         }
 222
 223         if (independent_irqs != 1)
 224                 return;
 225
 226         irq->flags |= IORESOURCE_IRQ_OPTIONAL;
 227         dev_info(&dev->dev, "made independent IRQ optional\n");
 228 }
 229
 230 #include <linux/pci.h>
 231
 232 static void quirk_system_pci_resources(struct pnp_dev *dev)
 233 {
 234         struct pci_dev *pdev = NULL;
 235         struct resource *res;
 236         resource_size_t pnp_start, pnp_end, pci_start, pci_end;
 237         int i, j;
 238
 239         /*
 240          * Some BIOSes have PNP motherboard devices with resources that
 241          * partially overlap PCI BARs.  The PNP system driver claims these
 242          * motherboard resources, which prevents the normal PCI driver from
 243          * requesting them later.
 244          *
 245          * This patch disables the PNP resources that conflict with PCI BARs
 246          * so they won't be claimed by the PNP system driver.
 247          */
 248         for_each_pci_dev(pdev) {
 249                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 250                         unsigned long flags, type;
 251
 252                         flags = pci_resource_flags(pdev, i);
 253                         type = flags & (IORESOURCE_IO | IORESOURCE_MEM);
 254                         if (!type || pci_resource_len(pdev, i) == 0)
 255                                 continue;
 256
 257                         if (flags & IORESOURCE_UNSET)
 258                                 continue;
 259
 260                         pci_start = pci_resource_start(pdev, i);
 261                         pci_end = pci_resource_end(pdev, i);
 262                         for (j = 0;
 263                              (res = pnp_get_resource(dev, type, j)); j++) {
 264                                 if (res->start == 0 && res->end == 0)
 265                                         continue;
 266
 267                                 pnp_start = res->start;
 268                                 pnp_end = res->end;
 269
 270                                 /*
 271                                  * If the PNP region doesn't overlap the PCI
 272                                  * region at all, there's no problem.
 273                                  */
 274                                 if (pnp_end < pci_start || pnp_start > pci_end)
 275                                         continue;
 276
 277                                 /*
 278                                  * If the PNP region completely encloses (or is
 279                                  * at least as large as) the PCI region, that's
 280                                  * also OK.  For example, this happens when the
 281                                  * PNP device describes a bridge with PCI
 282                                  * behind it.
 283                                  */
 284                                 if (pnp_start <= pci_start &&
 285                                     pnp_end >= pci_end)
 286                                         continue;
 287
 288                                 /*
 289                                  * Otherwise, the PNP region overlaps *part* of
 290                                  * the PCI region, and that might prevent a PCI
 291                                  * driver from requesting its resources.
 292                                  */
 293                                 dev_warn(&dev->dev,
 294                                          "disabling %pR because it overlaps "
 295                                          "%s BAR %d %pR\n", res,
 296                                          pci_name(pdev), i, &pdev->resource[i]);
 297                                 res->flags |= IORESOURCE_DISABLED;
 298                         }
 299                 }
 300         }
 301 }
 302
 303 #ifdef CONFIG_AMD_NB
 304
 305 #include <asm/amd_nb.h>
 306
 307 static void quirk_amd_mmconfig_area(struct pnp_dev *dev)
 308 {
 309         resource_size_t start, end;
 310         struct pnp_resource *pnp_res;
 311         struct resource *res;
 312         struct resource mmconfig_res, *mmconfig;
 313
 314         mmconfig = amd_get_mmconfig_range(&mmconfig_res);
 315         if (!mmconfig)
 316                 return;
 317
 318         list_for_each_entry(pnp_res, &dev->resources, list) {
 319                 res = &pnp_res->res;
 320                 if (res->end < mmconfig->start || res->start > mmconfig->end ||
 321                     (res->start == mmconfig->start && res->end == mmconfig->end))
 322                         continue;
 323
 324                 dev_info(&dev->dev, FW_BUG
 325                          "%pR covers only part of AMD MMCONFIG area %pR; adding more reservations\n",
 326                          res, mmconfig);
 327                 if (mmconfig->start < res->start) {
 328                         start = mmconfig->start;
 329                         end = res->start - 1;
 330                         pnp_add_mem_resource(dev, start, end, 0);
 331                 }
 332                 if (mmconfig->end > res->end) {
 333                         start = res->end + 1;
 334                         end = mmconfig->end;
 335                         pnp_add_mem_resource(dev, start, end, 0);
 336                 }
 337                 break;
 338         }
 339 }
 340 #endif
 341
 342 #ifdef CONFIG_PCI
 343 /* Device IDs of parts that have 32KB MCH space */
 344 static const unsigned int mch_quirk_devices[] = {
 345         0x0154, /* Ivy Bridge */
 346         0x0a04, /* Haswell-ULT */
 347         0x0c00, /* Haswell */
 348         0x1604, /* Broadwell */
 349 };
 350
 351 static struct pci_dev *get_intel_host(void)
 352 {
 353         int i;
 354         struct pci_dev *host;
 355
 356         for (i = 0; i < ARRAY_SIZE(mch_quirk_devices); i++) {
 357                 host = pci_get_device(PCI_VENDOR_ID_INTEL, mch_quirk_devices[i],
 358                                       NULL);
 359                 if (host)
 360                         return host;
 361         }
 362         return NULL;
 363 }
 364
 365 static void quirk_intel_mch(struct pnp_dev *dev)
 366 {
 367         struct pci_dev *host;
 368         u32 addr_lo, addr_hi;
 369         struct pci_bus_region region;
 370         struct resource mch;
 371         struct pnp_resource *pnp_res;
 372         struct resource *res;
 373
 374         host = get_intel_host();
 375         if (!host)
 376                 return;
 377
 378         /*
 379          * MCHBAR is not an architected PCI BAR, so MCH space is usually
 380          * reported as a PNP0C02 resource.  The MCH space was originally
 381          * 16KB, but is 32KB in newer parts.  Some BIOSes still report a
 382          * PNP0C02 resource that is only 16KB, which means the rest of the
 383          * MCH space is consumed but unreported.
 384          */
 385
 386         /*
 387          * Read MCHBAR for Host Member Mapped Register Range Base
 388          * https://www-ssl.intel.com/content/www/us/en/processors/core/4th-gen-core-family-desktop-vol-2-datasheet
 389          * Sec 3.1.12.
 390          */
 391         pci_read_config_dword(host, 0x48, &addr_lo);
 392         region.start = addr_lo & ~0x7fff;
 393         pci_read_config_dword(host, 0x4c, &addr_hi);
 394         region.start |= (u64) addr_hi << 32;
 395         region.end = region.start + 32*1024 - 1;
 396
 397         memset(&mch, 0, sizeof(mch));
 398         mch.flags = IORESOURCE_MEM;
 399         pcibios_bus_to_resource(host->bus, &mch, &region);
 400
 401         list_for_each_entry(pnp_res, &dev->resources, list) {
 402                 res = &pnp_res->res;
 403                 if (res->end < mch.start || res->start > mch.end)
 404                         continue;       /* no overlap */
 405                 if (res->start == mch.start && res->end == mch.end)
 406                         continue;       /* exact match */
 407
 408                 dev_info(&dev->dev, FW_BUG "PNP resource %pR covers only part of %s Intel MCH; extending to %pR\n",
 409                          res, pci_name(host), &mch);
 410                 res->start = mch.start;
 411                 res->end = mch.end;
 412                 break;
 413         }
 414
 415         pci_dev_put(host);
 416 }
 417 #endif
 418
 419 /*
 420  *  PnP Quirks
 421  *  Cards or devices that need some tweaking due to incomplete resource info
 422  */
 423
 424 static struct pnp_fixup pnp_fixups[] = {
 425         /* Soundblaster awe io port quirk */
 426         {"CTL0021", quirk_awe32_resources},
 427         {"CTL0022", quirk_awe32_resources},
 428         {"CTL0023", quirk_awe32_resources},
 429         /* CMI 8330 interrupt and dma fix */
 430         {"@X@0001", quirk_cmi8330_resources},
 431         /* Soundblaster audio device io port range quirk */
 432         {"CTL0001", quirk_sb16audio_resources},
 433         {"CTL0031", quirk_sb16audio_resources},
 434         {"CTL0041", quirk_sb16audio_resources},
 435         {"CTL0042", quirk_sb16audio_resources},
 436         {"CTL0043", quirk_sb16audio_resources},
 437         {"CTL0044", quirk_sb16audio_resources},
 438         {"CTL0045", quirk_sb16audio_resources},
 439         /* Add IRQ-optional MPU options */
 440         {"ADS7151", quirk_ad1815_mpu_resources},
 441         {"ADS7181", quirk_add_irq_optional_dependent_sets},
 442         {"AZT0002", quirk_add_irq_optional_dependent_sets},
 443         /* PnP resources that might overlap PCI BARs */
 444         {"PNP0c01", quirk_system_pci_resources},
 445         {"PNP0c02", quirk_system_pci_resources},
 446 #ifdef CONFIG_AMD_NB
 447         {"PNP0c01", quirk_amd_mmconfig_area},
 448 #endif
 449 #ifdef CONFIG_PCI
 450         {"PNP0c02", quirk_intel_mch},
 451 #endif
 452         {""}
 453 };
 454
 455 void pnp_fixup_device(struct pnp_dev *dev)
 456 {
 457         struct pnp_fixup *f;
 458
 459         for (f = pnp_fixups; *f->id; f++) {
 460                 if (!compare_pnp_id(dev->id, f->id))
 461                         continue;
 462                 pnp_dbg(&dev->dev, "%s: calling %pF\n", f->id,
 463                         f->quirk_function);
 464                 f->quirk_function(dev);
 465         }
 466 }