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         resource_size_t pnp_start, pnp_end, pci_start, pci_end;
 121         int i, j;
 122
 123         /*
 124          * Some BIOSes have PNP motherboard devices with resources that
 125          * partially overlap PCI BARs.  The PNP system driver claims these
 126          * motherboard resources, which prevents the normal PCI driver from
 127          * requesting them later.
 128          *
 129          * This patch disables the PNP resources that conflict with PCI BARs
 130          * so they won't be claimed by the PNP system driver.
 131          */
 132         for_each_pci_dev(pdev) {
 133                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 134                         if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM) ||
 135                             pci_resource_len(pdev, i) == 0)
 136                                 continue;
 137
 138                         pci_start = pci_resource_start(pdev, i);
 139                         pci_end = pci_resource_end(pdev, i);
 140                         for (j = 0; j < PNP_MAX_MEM; j++) {
 141                                 if (!pnp_mem_valid(dev, j) ||
 142                                     pnp_mem_len(dev, j) == 0)
 143                                         continue;
 144
 145                                 pnp_start = pnp_mem_start(dev, j);
 146                                 pnp_end = pnp_mem_end(dev, j);
 147
 148                                 /*
 149                                  * If the PNP region doesn't overlap the PCI
 150                                  * region at all, there's no problem.
 151                                  */
 152                                 if (pnp_end < pci_start || pnp_start > pci_end)
 153                                         continue;
 154
 155                                 /*
 156                                  * If the PNP region completely encloses (or is
 157                                  * at least as large as) the PCI region, that's
 158                                  * also OK.  For example, this happens when the
 159                                  * PNP device describes a bridge with PCI
 160                                  * behind it.
 161                                  */
 162                                 if (pnp_start <= pci_start &&
 163                                     pnp_end >= pci_end)
 164                                         continue;
 165
 166                                 /*
 167                                  * Otherwise, the PNP region overlaps *part* of
 168                                  * the PCI region, and that might prevent a PCI
 169                                  * driver from requesting its resources.
 170                                  */
 171                                 dev_warn(&dev->dev, "mem resource "
 172                                         "(0x%llx-0x%llx) overlaps %s BAR %d "
 173                                         "(0x%llx-0x%llx), disabling\n",
 174                                         (unsigned long long) pnp_start,
 175                                         (unsigned long long) pnp_end,
 176                                         pci_name(pdev), i,
 177                                         (unsigned long long) pci_start,
 178                                         (unsigned long long) pci_end);
 179                                 pnp_mem_flags(dev, j) = 0;
 180                         }
 181                 }
 182         }
 183 }
 184
 185 /*
 186  *  PnP Quirks
 187  *  Cards or devices that need some tweaking due to incomplete resource info
 188  */
 189
 190 static struct pnp_fixup pnp_fixups[] = {
 191         /* Soundblaster awe io port quirk */
 192         {"CTL0021", quirk_awe32_resources},
 193         {"CTL0022", quirk_awe32_resources},
 194         {"CTL0023", quirk_awe32_resources},
 195         /* CMI 8330 interrupt and dma fix */
 196         {"@X@0001", quirk_cmi8330_resources},
 197         /* Soundblaster audio device io port range quirk */
 198         {"CTL0001", quirk_sb16audio_resources},
 199         {"CTL0031", quirk_sb16audio_resources},
 200         {"CTL0041", quirk_sb16audio_resources},
 201         {"CTL0042", quirk_sb16audio_resources},
 202         {"CTL0043", quirk_sb16audio_resources},
 203         {"CTL0044", quirk_sb16audio_resources},
 204         {"CTL0045", quirk_sb16audio_resources},
 205         {"PNP0c01", quirk_system_pci_resources},
 206         {"PNP0c02", quirk_system_pci_resources},
 207         {""}
 208 };
 209
 210 void pnp_fixup_device(struct pnp_dev *dev)
 211 {
 212         int i = 0;
 213         void (*quirk)(struct pnp_dev *);
 214
 215         while (*pnp_fixups[i].id) {
 216                 if (compare_pnp_id(dev->id, pnp_fixups[i].id)) {
 217                         quirk = pnp_fixups[i].quirk_function;
 218
 219 #ifdef DEBUG
 220                         dev_dbg(&dev->dev, "calling ");
 221                         print_fn_descriptor_symbol("%s()\n",
 222                                 (unsigned long) *quirk);
 223 #endif
 224                         (*quirk)(dev);
 225                 }
 226                 i++;
 227         }
 228 }