drivers/pnp/quirks.c

   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
  25 static 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
  49 static 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
  68 static 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
 102 static 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
 137 static 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
 179 static 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
 207 static 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
 230 static 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 /*
 299  *  PnP Quirks
 300  *  Cards or devices that need some tweaking due to incomplete resource info
 301  */
 302
 303 static struct pnp_fixup pnp_fixups[] = {
 304         /* Soundblaster awe io port quirk */
 305         {"CTL0021", quirk_awe32_resources},
 306         {"CTL0022", quirk_awe32_resources},
 307         {"CTL0023", quirk_awe32_resources},
 308         /* CMI 8330 interrupt and dma fix */
 309         {"@X@0001", quirk_cmi8330_resources},
 310         /* Soundblaster audio device io port range quirk */
 311         {"CTL0001", quirk_sb16audio_resources},
 312         {"CTL0031", quirk_sb16audio_resources},
 313         {"CTL0041", quirk_sb16audio_resources},
 314         {"CTL0042", quirk_sb16audio_resources},
 315         {"CTL0043", quirk_sb16audio_resources},
 316         {"CTL0044", quirk_sb16audio_resources},
 317         {"CTL0045", quirk_sb16audio_resources},
 318         /* Add IRQ-optional MPU options */
 319         {"ADS7151", quirk_ad1815_mpu_resources},
 320         {"ADS7181", quirk_add_irq_optional_dependent_sets},
 321         {"AZT0002", quirk_add_irq_optional_dependent_sets},
 322         /* PnP resources that might overlap PCI BARs */
 323         {"PNP0c01", quirk_system_pci_resources},
 324         {"PNP0c02", quirk_system_pci_resources},
 325         {""}
 326 };
 327
 328 void pnp_fixup_device(struct pnp_dev *dev)
 329 {
 330         struct pnp_fixup *f;
 331
 332         for (f = pnp_fixups; *f->id; f++) {
 333                 if (!compare_pnp_id(dev->id, f->id))
 334                         continue;
 335                 pnp_dbg(&dev->dev, "%s: calling %pF\n", f->id,
 336                         f->quirk_function);
 337                 f->quirk_function(dev);
 338         }
 339 }