/* 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 */#endifextern 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_presentextern inline intpci_read_config_byte(struct pci_dev *dev, u8 where, u8 *val){    return pcibios_read_config_byte(dev->bus, dev->devfn, where, val);}extern inline intpci_read_config_word(struct pci_dev *dev, u8 where, u16 *val){    return pcibios_read_config_word(dev->bus, dev->devfn, where, val);}extern inline intpci_read_config_dword(struct pci_dev *dev, u8 where, u32 *val){    return pcibios_read_config_dword(dev->bus, dev->devfn, where, val);}extern inline intpci_write_config_byte(struct pci_dev *dev, u8 where, u8 val){    return pcibios_write_config_byte(dev->bus, dev->devfn, where, val);}extern inline intpci_write_config_word(struct pci_dev *dev, u8 where, u16 val){    return pcibios_write_config_word(dev->bus, dev->devfn, where, val);}extern inline intpci_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_ */