作者：华清远见嵌入式学院。《Linux设备驱动开发详解》（08&09年度畅销榜TOP50）第21章、PCI设备驱动。PCI（及cPCI）总线在一般的小型手持设备中不太可能用到，但是在工控和通信设备及其PC中却引领着潮流。在Linux系统中，PCI设备驱动和USB设备驱动有共性，那就是其驱动都由总线相关部分和自身设备类型驱动两部分组成。21.1节讲解了PCI总线及其配置空间，给出了PCI总线在Linux内核中的数据结构。PCI设备驱动的PCI相关部分围绕着pci_driver结构体的成员函数展开，21.2节讲解了pci_driver结构体及其成员函数的含义，并分析了PCI设备驱动的框架结构。21.3节以Intel 810主板集成声卡为实例进一步讲解PCI设备驱动的编写方法。-Author: HuaQing vision embedded institute. The Linux device driver development "(08 and 09 sep TOP50) annual list of best-selling chapter 21, PCI device drivers. PCI cPCI (and in general) bus small hand-held devices not too, but may be used in industrial control and communication equipment and PC is leading the trend. In Linux system, PCI device drivers and USB device drivers have common, and that is the driving all relevant parts by bus and their own equipment type drive two parts. Section 21.1 explained PCI bus and the configuration space is given, and the PCI bus in the Linux kernel of data structure. PCI device driver PCI relevant parts around the pci_driver structure members of the body function expansion, section 21.2 explained pci_driver structures and its member function meaning, and analysis the PCI device driver frame structure. Section 21.3 to 810 motherboard integration intel-based ? sound card