--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pci-compat.h	Wed Jan 16 14:01:55 2002 +0100
@@ -0,0 +1,190 @@
+
+/* This header only makes sense when included in a 2.0 compile */
+
+/*
+ * Copyright (C) 2001 Alessandro Rubini and Jonathan Corbet
+ * Copyright (C) 2001 O'Reilly & Associates
+ *
+ * The source code in this file can be freely used, adapted,
+ * and redistributed in source or binary form, so long as an
+ * acknowledgment appears in derived source files.  The citation
+ * should list that the code comes from the book "Linux Device
+ * Drivers" by Alessandro Rubini and Jonathan Corbet, published
+ * by O'Reilly & Associates.   No warranty is attached;
+ * we cannot take responsibility for errors or fitness for use.
+ */
+
+#ifndef _PCI_COMPAT_H_
+#define _PCI_COMPAT_H_
+
+#ifdef __KERNEL__
+
+/*
+ * This only makes sense if <linux/pci.h> is already included, *and*
+ * we are using 2.0.
+*/
+#if defined(LINUX_PCI_H) && (LINUX_VERSION_CODE & 0xffff00) == 0x020000
+
+#include <linux/bios32.h> /* pcibios_* */
+#include <linux/malloc.h> /* kmalloc */
+
+/* fake the new pci interface based on the old one: encapsulate bus/devfn */
+struct pci_fake_dev {
+  int index;
+  unsigned short vendor, device;
+  void *driver_data; /* net i.f. drivers make it point to net_device */
+  u8 bus;
+  u8 devfn;
+};
+#define pci_dev pci_fake_dev /* the other pci_dev is unused by 2.0 drivers */
+
+
+#ifndef PCI_HEADER_TYPE_NORMAL /* These definitions are missing from 2.0 */
+#  define PCI_HEADER_TYPE_NORMAL 0
+#  define PCI_HEADER_TYPE_BRIDGE 1
+#  define   PCI_PRIMARY_BUS         0x18    /* Primary bus number */
+#  define   PCI_SECONDARY_BUS       0x19    /* Secondary bus number */
+#  define   PCI_SUBORDINATE_BUS     0x1a    /* Highest bus behind the bridge */
+#  define PCI_HEADER_TYPE_CARDBUS 2
+#  define   PCI_CB_PRIMARY_BUS      0x18    /* PCI bus number */
+#  define   PCI_CB_CARD_BUS         0x19    /* CardBus bus number */
+#  define   PCI_CB_SUBORDINATE_BUS  0x1a    /* Subordinate bus number */
+#endif
+
+extern inline struct pci_dev *pci_find_device(unsigned int vendorid,
+					      unsigned int devid,
+					      struct pci_dev *from)
+{
+    struct pci_dev *pptr = kmalloc(sizeof(*pptr), GFP_KERNEL);
+    int index = 0;
+    int ret;
+
+    if (!pptr) return NULL;
+    if (from) index = from->index + 1;
+    pptr->index = index;
+    ret = pcibios_find_device(vendorid, devid, index,
+			      &pptr->bus, &pptr->devfn);
+    if (ret) { kfree(pptr); return NULL; }
+    /* fill other fields */
+    pcibios_read_config_word(pptr->bus, pptr->devfn,
+			     PCI_VENDOR_ID, &pptr->vendor);
+    pcibios_read_config_word(pptr->bus, pptr->devfn,
+			     PCI_DEVICE_ID, &pptr->device);
+    return pptr;
+}
+
+#if 0
+/* this used to be only the base class, Hmm... better not offer it*/
+extern inline struct pci_dev *pci_find_class(unsigned int class,
+					     struct pci_dev *from)
+{
+    struct pci_dev *pptr = kmalloc(sizeof(*pptr), GFP_KERNEL);
+    int index = 0;
+    int ret;
+
+    if (!pptr) return NULL;
+    if (from) index = from->index + 1;
+    pptr->index = index;
+    ret = pcibios_find_class(class, index,
+			      &pptr->bus, &pptr->devfn);
+    if (ret) { kfree(pptr); return NULL; }
+    /* fill other fields */
+    pcibios_read_config_word(pptr->bus, pptr->devfn,
+			     PCI_VENDOR_ID, &pptr->vendor);
+    pcibios_read_config_word(pptr->bus, pptr->devfn,
+			     PCI_DEVICE_ID, &pptr->device);
+    return pptr;
+}
+#endif
+
+/* this is used by pciregions instead */
+extern inline struct pci_dev *pci_find_slot (unsigned int bus,
+					     unsigned int devfn)
+{
+    struct pci_dev *pptr = kmalloc(sizeof(*pptr), GFP_KERNEL);
+    int index = 0;
+    unsigned short vendor;
+    int ret;
+
+    if (!pptr) return NULL;
+    pptr->index = index; /* 0 */
+    ret = pcibios_read_config_word(bus, devfn, PCI_VENDOR_ID, &vendor);
+    if (ret /* == PCIBIOS_DEVICE_NOT_FOUND or whatever error */
+	|| vendor==0xffff || vendor==0x0000) {
+        kfree(pptr); return NULL;
+    }
+    printk("ok (%i, %i %x)\n", bus, devfn, vendor);
+    /* fill other fields */
+    pptr->bus = bus;
+    pptr->devfn = devfn;
+    pcibios_read_config_word(pptr->bus, pptr->devfn,
+			     PCI_VENDOR_ID, &pptr->vendor);
+    pcibios_read_config_word(pptr->bus, pptr->devfn,
+			     PCI_DEVICE_ID, &pptr->device);
+    return pptr;
+}
+
+
+
+/* this is not used in the real (2.2, 2.4) implementation, but we need it */
+extern inline void pci_release_device(struct pci_dev *dev)
+{
+    kfree(dev);
+}
+
+/* struct pci_dev *pci_find_slot (unsigned int bus, unsigned int devfn); */
+
+#define pci_present pcibios_present
+
+extern inline int
+pci_read_config_byte(struct pci_dev *dev, u8 where, u8 *val)
+{
+    return pcibios_read_config_byte(dev->bus, dev->devfn, where, val);
+}
+
+extern inline int
+pci_read_config_word(struct pci_dev *dev, u8 where, u16 *val)
+{
+    return pcibios_read_config_word(dev->bus, dev->devfn, where, val);
+}
+
+extern inline int
+pci_read_config_dword(struct pci_dev *dev, u8 where, u32 *val)
+{
+    return pcibios_read_config_dword(dev->bus, dev->devfn, where, val);
+}
+
+extern inline int
+pci_write_config_byte(struct pci_dev *dev, u8 where, u8 val)
+{
+    return pcibios_write_config_byte(dev->bus, dev->devfn, where, val);
+}
+
+extern inline int
+pci_write_config_word(struct pci_dev *dev, u8 where, u16 val)
+{
+    return pcibios_write_config_word(dev->bus, dev->devfn, where, val);
+}
+
+extern inline int
+pci_write_config_dword(struct pci_dev *dev, u8 where, u32 val)
+{
+    return pcibios_write_config_dword(dev->bus, dev->devfn, where, val);
+}
+
+extern inline void pci_set_master(struct pci_dev *dev)
+{
+    u16 cmd;
+    pcibios_read_config_word(dev->bus, dev->devfn, PCI_COMMAND, &cmd);
+    cmd |= PCI_COMMAND_MASTER;
+    pcibios_write_config_word(dev->bus, dev->devfn, PCI_COMMAND, cmd);
+}
+
+#endif /* version 2.0 and pci.h included */
+#endif /* __KERNEL__ */
+#endif /* _PCI_COMPAT_H_ */
+
+
+
+
+