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) {    // Valid irqs are 5, 7, 10
  70                         tmp = 0x04A0;
  71                         bitmap_copy(irq->map, &tmp, 16);        // 0000 0100 1010 0000
  72                 }
  73
  74                 for (dma = res->dma; dma; dma = dma->next)      // Valid 8bit dma channels are 1,3
  75                         if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
  76                             IORESOURCE_DMA_8BIT)
  77                                 dma->map = 0x000A;
  78         }
  79         dev_info(&dev->dev, "CMI8330 quirk - forced possible IRQs to 5, 7, 10 "
  80                 "and DMA channels to 1, 3\n");
  81 }
  82
  83 static void quirk_sb16audio_resources(struct pnp_dev *dev)
  84 {
  85         struct pnp_port *port;
  86         struct pnp_option *res = dev->dependent;
  87         int changed = 0;
  88
  89         /*
  90          * The default range on the mpu port for these devices is 0x388-0x388.
  91          * Here we increase that range so that two such cards can be
  92          * auto-configured.
  93          */
  94
  95         for (; res; res = res->next) {
  96                 port = res->port;
  97                 if (!port)
  98                         continue;
  99                 port = port->next;
 100                 if (!port)
 101                         continue;
 102                 port = port->next;
 103                 if (!port)
 104                         continue;
 105                 if (port->min != port->max)
 106                         continue;
 107                 port->max += 0x70;
 108                 changed = 1;
 109         }
 110         if (changed)
 111                 dev_info(&dev->dev, "SB audio device quirk - increased port range\n");
 112 }
 113
 114
 115 #include <linux/pci.h>
 116
 117 static void quirk_system_pci_resources(struct pnp_dev *dev)
 118 {
 119         struct pci_dev *pdev = NULL;
 120         struct resource *res;
 121         resource_size_t pnp_start, pnp_end, pci_start, pci_end;
 122         int i, j;
 123
 124         /*
 125          * Some BIOSes have PNP motherboard devices with resources that
 126          * partially overlap PCI BARs.  The PNP system driver claims these
 127          * motherboard resources, which prevents the normal PCI driver from
 128          * requesting them later.
 129          *
 130          * This patch disables the PNP resources that conflict with PCI BARs
 131          * so they won't be claimed by the PNP system driver.
 132          */
 133         for_each_pci_dev(pdev) {
 134                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 135                         if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
 136                             pci_resource_len(pdev, i) == 0)
 137                                 continue;
 138
 139                         pci_start = pci_resource_start(pdev, i);
 140                         pci_end = pci_resource_end(pdev, i);
 141                         for (j = 0;
 142                              (res = pnp_get_resource(dev, IORESOURCE_MEM, j));
 143                              j++) {
 144                                 if (res->flags & IORESOURCE_UNSET ||
 145                                     (res->start == 0 && res->end == 0))
 146                                         continue;
 147
 148                                 pnp_start = res->start;
 149                                 pnp_end = res->end;
 150
 151                                 /*
 152                                  * If the PNP region doesn't overlap the PCI
 153                                  * region at all, there's no problem.
 154                                  */
 155                                 if (pnp_end < pci_start || pnp_start > pci_end)
 156                                         continue;
 157
 158                                 /*
 159                                  * If the PNP region completely encloses (or is
 160                                  * at least as large as) the PCI region, that's
 161                                  * also OK.  For example, this happens when the
 162                                  * PNP device describes a bridge with PCI
 163                                  * behind it.
 164                                  */
 165                                 if (pnp_start <= pci_start &&
 166                                     pnp_end >= pci_end)
 167                                         continue;
 168
 169                                 /*
 170                                  * Otherwise, the PNP region overlaps *part* of
 171                                  * the PCI region, and that might prevent a PCI
 172                                  * driver from requesting its resources.
 173                                  */
 174                                 dev_warn(&dev->dev, "mem resource "
 175                                         "(0x%llx-0x%llx) overlaps %s BAR %d "
 176                                         "(0x%llx-0x%llx), disabling\n",
 177                                         (unsigned long long) pnp_start,
 178                                         (unsigned long long) pnp_end,
 179                                         pci_name(pdev), i,
 180                                         (unsigned long long) pci_start,
 181                                         (unsigned long long) pci_end);
 182                                 res->flags = 0;
 183                         }
 184                 }
 185         }
 186 }
 187
 188 /*
 189  *  PnP Quirks
 190  *  Cards or devices that need some tweaking due to incomplete resource info
 191  */
 192
 193 static struct pnp_fixup pnp_fixups[] = {
 194         /* Soundblaster awe io port quirk */
 195         {"CTL0021", quirk_awe32_resources},
 196         {"CTL0022", quirk_awe32_resources},
 197         {"CTL0023", quirk_awe32_resources},
 198         /* CMI 8330 interrupt and dma fix */
 199         {"@X@0001", quirk_cmi8330_resources},
 200         /* Soundblaster audio device io port range quirk */
 201         {"CTL0001", quirk_sb16audio_resources},
 202         {"CTL0031", quirk_sb16audio_resources},
 203         {"CTL0041", quirk_sb16audio_resources},
 204         {"CTL0042", quirk_sb16audio_resources},
 205         {"CTL0043", quirk_sb16audio_resources},
 206         {"CTL0044", quirk_sb16audio_resources},
 207         {"CTL0045", quirk_sb16audio_resources},
 208         {"PNP0c01", quirk_system_pci_resources},
 209         {"PNP0c02", quirk_system_pci_resources},
 210         {""}
 211 };
 212
 213 void pnp_fixup_device(struct pnp_dev *dev)
 214 {
 215         int i = 0;
 216         void (*quirk)(struct pnp_dev *);
 217
 218         while (*pnp_fixups[i].id) {
 219                 if (compare_pnp_id(dev->id, pnp_fixups[i].id)) {
 220                         quirk = pnp_fixups[i].quirk_function;
 221
 222 #ifdef DEBUG
 223                         dev_dbg(&dev->dev, "calling ");
 224                         print_fn_descriptor_symbol("%s()\n",
 225                                 (unsigned long) *quirk);
 226 #endif
 227                         (*quirk)(dev);
 228                 }
 229                 i++;
 230         }
 231 }