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-optional 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_port;
 131                 struct pnp_irq *irq;
 132                 struct pnp_irq *copy_irq;
 133
 134                 port = res->port;
 135                 irq = res->irq;
 136                 if (!port || !irq)
 137                         continue;
 138
 139                 copy_port = pnp_alloc(sizeof *copy_port);
 140                 if (!copy_port)
 141                         break;
 142
 143                 copy_irq = pnp_alloc(sizeof *copy_irq);
 144                 if (!copy_irq) {
 145                         kfree(copy_port);
 146                         break;
 147                 }
 148
 149                 *copy_port = *port;
 150                 copy_port->next = NULL;
 151
 152                 *copy_irq = *irq;
 153                 copy_irq->flags |= IORESOURCE_IRQ_OPTIONAL;
 154                 copy_irq->next = NULL;
 155
 156                 curr = pnp_build_option(PNP_RES_PRIORITY_FUNCTIONAL);
 157                 if (!curr) {
 158                         kfree(copy_port);
 159                         kfree(copy_irq);
 160                         break;
 161                 }
 162                 curr->port = copy_port;
 163                 curr->irq = copy_irq;
 164
 165                 if (prev)
 166                         prev->next = curr;
 167                 else
 168                         head = curr;
 169                 prev = curr;
 170         }
 171         if (head)
 172                 dev_info(&dev->dev, "adding IRQ-optional MPU options\n");
 173
 174         return head;
 175 }
 176
 177 static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
 178 {
 179         struct pnp_option *res;
 180         struct pnp_irq *irq;
 181
 182         res = dev->independent;
 183         if (!res)
 184                 return;
 185
 186         irq = res->irq;
 187         if (!irq || irq->next)
 188                 return;
 189
 190         irq->flags |= IORESOURCE_IRQ_OPTIONAL;
 191         dev_info(&dev->dev, "made independent IRQ optional\n");
 192 }
 193
 194 static void quirk_isapnp_mpu_resources(struct pnp_dev *dev)
 195 {
 196         struct pnp_option *res;
 197
 198         res = dev->dependent;
 199         if (!res)
 200                 return;
 201
 202         while (res->next)
 203                 res = res->next;
 204
 205         res->next = quirk_isapnp_mpu_options(dev);
 206 }
 207
 208 #include <linux/pci.h>
 209
 210 static void quirk_system_pci_resources(struct pnp_dev *dev)
 211 {
 212         struct pci_dev *pdev = NULL;
 213         struct resource *res;
 214         resource_size_t pnp_start, pnp_end, pci_start, pci_end;
 215         int i, j;
 216
 217         /*
 218          * Some BIOSes have PNP motherboard devices with resources that
 219          * partially overlap PCI BARs.  The PNP system driver claims these
 220          * motherboard resources, which prevents the normal PCI driver from
 221          * requesting them later.
 222          *
 223          * This patch disables the PNP resources that conflict with PCI BARs
 224          * so they won't be claimed by the PNP system driver.
 225          */
 226         for_each_pci_dev(pdev) {
 227                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 228                         if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
 229                             pci_resource_len(pdev, i) == 0)
 230                                 continue;
 231
 232                         pci_start = pci_resource_start(pdev, i);
 233                         pci_end = pci_resource_end(pdev, i);
 234                         for (j = 0;
 235                              (res = pnp_get_resource(dev, IORESOURCE_MEM, j));
 236                              j++) {
 237                                 if (res->start == 0 && res->end == 0)
 238                                         continue;
 239
 240                                 pnp_start = res->start;
 241                                 pnp_end = res->end;
 242
 243                                 /*
 244                                  * If the PNP region doesn't overlap the PCI
 245                                  * region at all, there's no problem.
 246                                  */
 247                                 if (pnp_end < pci_start || pnp_start > pci_end)
 248                                         continue;
 249
 250                                 /*
 251                                  * If the PNP region completely encloses (or is
 252                                  * at least as large as) the PCI region, that's
 253                                  * also OK.  For example, this happens when the
 254                                  * PNP device describes a bridge with PCI
 255                                  * behind it.
 256                                  */
 257                                 if (pnp_start <= pci_start &&
 258                                     pnp_end >= pci_end)
 259                                         continue;
 260
 261                                 /*
 262                                  * Otherwise, the PNP region overlaps *part* of
 263                                  * the PCI region, and that might prevent a PCI
 264                                  * driver from requesting its resources.
 265                                  */
 266                                 dev_warn(&dev->dev, "mem resource "
 267                                         "(0x%llx-0x%llx) overlaps %s BAR %d "
 268                                         "(0x%llx-0x%llx), disabling\n",
 269                                         (unsigned long long) pnp_start,
 270                                         (unsigned long long) pnp_end,
 271                                         pci_name(pdev), i,
 272                                         (unsigned long long) pci_start,
 273                                         (unsigned long long) pci_end);
 274                                 res->flags |= IORESOURCE_DISABLED;
 275                         }
 276                 }
 277         }
 278 }
 279
 280 /*
 281  *  PnP Quirks
 282  *  Cards or devices that need some tweaking due to incomplete resource info
 283  */
 284
 285 static struct pnp_fixup pnp_fixups[] = {
 286         /* Soundblaster awe io port quirk */
 287         {"CTL0021", quirk_awe32_resources},
 288         {"CTL0022", quirk_awe32_resources},
 289         {"CTL0023", quirk_awe32_resources},
 290         /* CMI 8330 interrupt and dma fix */
 291         {"@X@0001", quirk_cmi8330_resources},
 292         /* Soundblaster audio device io port range quirk */
 293         {"CTL0001", quirk_sb16audio_resources},
 294         {"CTL0031", quirk_sb16audio_resources},
 295         {"CTL0041", quirk_sb16audio_resources},
 296         {"CTL0042", quirk_sb16audio_resources},
 297         {"CTL0043", quirk_sb16audio_resources},
 298         {"CTL0044", quirk_sb16audio_resources},
 299         {"CTL0045", quirk_sb16audio_resources},
 300         /* Add IRQ-less MPU options */
 301         {"ADS7151", quirk_ad1815_mpu_resources},
 302         {"ADS7181", quirk_isapnp_mpu_resources},
 303         {"AZT0002", quirk_isapnp_mpu_resources},
 304         /* PnP resources that might overlap PCI BARs */
 305         {"PNP0c01", quirk_system_pci_resources},
 306         {"PNP0c02", quirk_system_pci_resources},
 307         {""}
 308 };
 309
 310 void pnp_fixup_device(struct pnp_dev *dev)
 311 {
 312         struct pnp_fixup *f;
 313
 314         for (f = pnp_fixups; *f->id; f++) {
 315                 if (!compare_pnp_id(dev->id, f->id))
 316                         continue;
 317 #ifdef DEBUG
 318                 dev_dbg(&dev->dev, "%s: calling ", f->id);
 319                 print_fn_descriptor_symbol("%s\n", f->quirk_function);
 320 #endif
 321                 f->quirk_function(dev);
 322         }
 323 }