err.no Git - linux-2.6/blob - 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  *
   9  *  Heavily based on PCI quirks handling which is
  10  *
  11  *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
  12  */
  13
  14 #include <linux/types.h>
  15 #include <linux/kernel.h>
  16 #include <linux/string.h>
  17 #include <linux/slab.h>
  18 #include <linux/pnp.h>
  19 #include <linux/io.h>
  20 #include <linux/kallsyms.h>
  21 #include "base.h"
  22
  23 static void quirk_awe32_resources(struct pnp_dev *dev)
  24 {
  25         struct pnp_port *port, *port2, *port3;
  26         struct pnp_option *res = dev->dependent;
  27
  28         /*
  29          * Unfortunately the isapnp_add_port_resource is too tightly bound
  30          * into the PnP discovery sequence, and cannot be used. Link in the
  31          * two extra ports (at offset 0x400 and 0x800 from the one given) by
  32          * hand.
  33          */
  34         for (; res; res = res->next) {
  35                 port2 = pnp_alloc(sizeof(struct pnp_port));
  36                 if (!port2)
  37                         return;
  38                 port3 = pnp_alloc(sizeof(struct pnp_port));
  39                 if (!port3) {
  40                         kfree(port2);
  41                         return;
  42                 }
  43                 port = res->port;
  44                 memcpy(port2, port, sizeof(struct pnp_port));
  45                 memcpy(port3, port, sizeof(struct pnp_port));
  46                 port->next = port2;
  47                 port2->next = port3;
  48                 port2->min += 0x400;
  49                 port2->max += 0x400;
  50                 port3->min += 0x800;
  51                 port3->max += 0x800;
  52                 dev_info(&dev->dev,
  53                         "AWE32 quirk - added ioports 0x%lx and 0x%lx\n",
  54                         (unsigned long)port2->min,
  55                         (unsigned long)port3->min);
  56         }
  57 }
  58
  59 static void quirk_cmi8330_resources(struct pnp_dev *dev)
  60 {
  61         struct pnp_option *res = dev->dependent;
  62         unsigned long tmp;
  63
  64         for (; res; res = res->next) {
  65
  66                 struct pnp_irq *irq;
  67                 struct pnp_dma *dma;
  68
  69                 for (irq = res->irq; irq; irq = irq->next) {
  70                         /* Valid irqs are 5, 7, 10 */
  71                         tmp = 0x04A0;
  72                         bitmap_copy(irq->map.bits, &tmp, 16);
  73                 }
  74
  75                 for (dma = res->dma; dma; dma = dma->next) {
  76                         /* Valid 8bit dma channels are 1,3 */
  77                         if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
  78                             IORESOURCE_DMA_8BIT)
  79                                 dma->map = 0x000A;
  80                 }
  81         }
  82         dev_info(&dev->dev, "CMI8330 quirk - forced possible IRQs to 5, 7, 10 "
  83                 "and DMA channels to 1, 3\n");
  84 }
  85
  86 static void quirk_sb16audio_resources(struct pnp_dev *dev)
  87 {
  88         struct pnp_port *port;
  89         struct pnp_option *res = dev->dependent;
  90         int changed = 0;
  91
  92         /*
  93          * The default range on the mpu port for these devices is 0x388-0x388.
  94          * Here we increase that range so that two such cards can be
  95          * auto-configured.
  96          */
  97
  98         for (; res; res = res->next) {
  99                 port = res->port;
 100                 if (!port)
 101                         continue;
 102                 port = port->next;
 103                 if (!port)
 104                         continue;
 105                 port = port->next;
 106                 if (!port)
 107                         continue;
 108                 if (port->min != port->max)
 109                         continue;
 110                 port->max += 0x70;
 111                 changed = 1;
 112         }
 113         if (changed)
 114                 dev_info(&dev->dev, "SB audio device quirk - increased port range\n");
 115 }
 116
 117 static struct pnp_option *quirk_isapnp_mpu_options(struct pnp_dev *dev)
 118 {
 119         struct pnp_option *head = NULL;
 120         struct pnp_option *prev = NULL;
 121         struct pnp_option *res;
 122
 123         /*
 124          * Build a functional IRQ-less variant of each MPU option.
 125          */
 126
 127         for (res = dev->dependent; res; res = res->next) {
 128                 struct pnp_option *curr;
 129                 struct pnp_port *port;
 130                 struct pnp_port *copy;
 131
 132                 port = res->port;
 133                 if (!port || !res->irq)
 134                         continue;
 135
 136                 copy = pnp_alloc(sizeof *copy);
 137                 if (!copy)
 138                         break;
 139
 140                 copy->min = port->min;
 141                 copy->max = port->max;
 142                 copy->align = port->align;
 143                 copy->size = port->size;
 144                 copy->flags = port->flags;
 145
 146                 curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL);
 147                 if (!curr) {
 148                         kfree(copy);
 149                         break;
 150                 }
 151                 curr->port = copy;
 152
 153                 if (prev)
 154                         prev->next = curr;
 155                 else
 156                         head = curr;
 157                 prev = curr;
 158         }
 159         if (head)
 160                 dev_info(&dev->dev, "adding IRQ-less MPU options\n");
 161
 162         return head;
 163 }
 164
 165 static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
 166 {
 167         struct pnp_option *res;
 168         struct pnp_irq *irq;
 169
 170         /*
 171          * Distribute the independent IRQ over the dependent options
 172          */
 173
 174         res = dev->independent;
 175         if (!res)
 176                 return;
 177
 178         irq = res->irq;
 179         if (!irq || irq->next)
 180                 return;
 181
 182         res = dev->dependent;
 183         if (!res)
 184                 return;
 185
 186         while (1) {
 187                 struct pnp_irq *copy;
 188
 189                 copy = pnp_alloc(sizeof *copy);
 190                 if (!copy)
 191                         break;
 192
 193                 bitmap_copy(copy->map.bits, irq->map.bits, PNP_IRQ_NR);
 194                 copy->flags = irq->flags;
 195
 196                 copy->next = res->irq; /* Yes, this is NULL */
 197                 res->irq = copy;
 198
 199                 if (!res->next)
 200                         break;
 201                 res = res->next;
 202         }
 203         kfree(irq);
 204
 205         res->next = quirk_isapnp_mpu_options(dev);
 206
 207         res = dev->independent;
 208         res->irq = NULL;
 209 }
 210
 211 static void quirk_isapnp_mpu_resources(struct pnp_dev *dev)
 212 {
 213         struct pnp_option *res;
 214
 215         res = dev->dependent;
 216         if (!res)
 217                 return;
 218
 219         while (res->next)
 220                 res = res->next;
 221
 222         res->next = quirk_isapnp_mpu_options(dev);
 223 }
 224
 225 #include <linux/pci.h>
 226
 227 static void quirk_system_pci_resources(struct pnp_dev *dev)
 228 {
 229         struct pci_dev *pdev = NULL;
 230         struct resource *res;
 231         resource_size_t pnp_start, pnp_end, pci_start, pci_end;
 232         int i, j;
 233
 234         /*
 235          * Some BIOSes have PNP motherboard devices with resources that
 236          * partially overlap PCI BARs.  The PNP system driver claims these
 237          * motherboard resources, which prevents the normal PCI driver from
 238          * requesting them later.
 239          *
 240          * This patch disables the PNP resources that conflict with PCI BARs
 241          * so they won't be claimed by the PNP system driver.
 242          */
 243         for_each_pci_dev(pdev) {
 244                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 245                         if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
 246                             pci_resource_len(pdev, i) == 0)
 247                                 continue;
 248
 249                         pci_start = pci_resource_start(pdev, i);
 250                         pci_end = pci_resource_end(pdev, i);
 251                         for (j = 0;
 252                              (res = pnp_get_resource(dev, IORESOURCE_MEM, j));
 253                              j++) {
 254                                 if (res->start == 0 && res->end == 0)
 255                                         continue;
 256
 257                                 pnp_start = res->start;
 258                                 pnp_end = res->end;
 259
 260                                 /*
 261                                  * If the PNP region doesn't overlap the PCI
 262                                  * region at all, there's no problem.
 263                                  */
 264                                 if (pnp_end < pci_start || pnp_start > pci_end)
 265                                         continue;
 266
 267                                 /*
 268                                  * If the PNP region completely encloses (or is
 269                                  * at least as large as) the PCI region, that's
 270                                  * also OK.  For example, this happens when the
 271                                  * PNP device describes a bridge with PCI
 272                                  * behind it.
 273                                  */
 274                                 if (pnp_start <= pci_start &&
 275                                     pnp_end >= pci_end)
 276                                         continue;
 277
 278                                 /*
 279                                  * Otherwise, the PNP region overlaps *part* of
 280                                  * the PCI region, and that might prevent a PCI
 281                                  * driver from requesting its resources.
 282                                  */
 283                                 dev_warn(&dev->dev, "mem resource "
 284                                         "(0x%llx-0x%llx) overlaps %s BAR %d "
 285                                         "(0x%llx-0x%llx), disabling\n",
 286                                         (unsigned long long) pnp_start,
 287                                         (unsigned long long) pnp_end,
 288                                         pci_name(pdev), i,
 289                                         (unsigned long long) pci_start,
 290                                         (unsigned long long) pci_end);
 291                                 res->flags |= IORESOURCE_DISABLED;
 292                         }
 293                 }
 294         }
 295 }
 296
 297 /*
 298  *  PnP Quirks
 299  *  Cards or devices that need some tweaking due to incomplete resource info
 300  */
 301
 302 static struct pnp_fixup pnp_fixups[] = {
 303         /* Soundblaster awe io port quirk */
 304         {"CTL0021", quirk_awe32_resources},
 305         {"CTL0022", quirk_awe32_resources},
 306         {"CTL0023", quirk_awe32_resources},
 307         /* CMI 8330 interrupt and dma fix */
 308         {"@X@0001", quirk_cmi8330_resources},
 309         /* Soundblaster audio device io port range quirk */
 310         {"CTL0001", quirk_sb16audio_resources},
 311         {"CTL0031", quirk_sb16audio_resources},
 312         {"CTL0041", quirk_sb16audio_resources},
 313         {"CTL0042", quirk_sb16audio_resources},
 314         {"CTL0043", quirk_sb16audio_resources},
 315         {"CTL0044", quirk_sb16audio_resources},
 316         {"CTL0045", quirk_sb16audio_resources},
 317         /* Add IRQ-less MPU options */
 318         {"ADS7151", quirk_ad1815_mpu_resources},
 319         {"ADS7181", quirk_isapnp_mpu_resources},
 320         {"AZT0002", quirk_isapnp_mpu_resources},
 321         /* PnP resources that might overlap PCI BARs */
 322         {"PNP0c01", quirk_system_pci_resources},
 323         {"PNP0c02", quirk_system_pci_resources},
 324         {""}
 325 };
 326
 327 void pnp_fixup_device(struct pnp_dev *dev)
 328 {
 329         struct pnp_fixup *f;
 330
 331         for (f = pnp_fixups; *f->id; f++) {
 332                 if (!compare_pnp_id(dev->id, f->id))
 333                         continue;
 334 #ifdef DEBUG
 335                 dev_dbg(&dev->dev, "%s: calling ", f->id);
 336                 print_fn_descriptor_symbol("%s\n", f->quirk_function);
 337 #endif
 338                 f->quirk_function(dev);
 339         }
 340 }