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