详解linux usb host驱动编写入门

obj-$(CONFIG_USB_OHCI_HCD_S3C2410) += ohci-s3c2410.o 

config USB_OHCI_HCD_S3C2410 
    tristate "OHCI support for Samsung S3C24xx/S3C64xx SoC series" 
    depends on USB_OHCI_HCD && (ARCH_S3C24XX || ARCH_S3C64XX) 
    default y 
    ---help--- 
     Enables support for the on-chip OHCI controller on 
     S3C24xx/S3C64xx chips. 

config USB_OHCI_HCD 
  tristate "OHCI HCD (USB 1.1) support" 
  depends on HAS_DMA && HAS_IOMEM 
  ---help--- 
   The Open Host Controller Interface (OHCI) is a standard for accessing 
   USB 1.1 host controller hardware. It does more in hardware than Intel's 
   UHCI specification. If your USB host controller follows the OHCI spec, 
   say Y. On most non-x86 systems, and on x86 hardware that's not using a 
   USB controller from Intel or VIA, this is appropriate. If your host 
   controller doesn't use PCI, this is probably appropriate. For a PCI 
   based system where you're not sure, the "lspci -v" entry will list the 
   right "prog-if" for your USB controller(s): EHCI, OHCI, or UHCI. 
 
   To compile this driver as a module, choose M here: the 
   module will be called ohci-hcd. 

obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o 

static const char  hcd_name [] = "ohci_hcd"; 
 
#define STATECHANGE_DELAY  msecs_to_jiffies(300) 
#define IO_WATCHDOG_DELAY  msecs_to_jiffies(275) 
#define IO_WATCHDOG_OFF   0xffffff00 
 
#include "ohci.h" 
#include "pci-quirks.h" 
 
static void ohci_dump(struct ohci_hcd *ohci); 
static void ohci_stop(struct usb_hcd *hcd); 
static void io_watchdog_func(struct timer_list *t); 
 
#include "ohci-hub.c" 
#include "ohci-dbg.c" 
#include "ohci-mem.c" 
#include "ohci-q.c" 

static inline unsigned int _ohci_readl (const struct ohci_hcd *ohci, 
          __hc32 __iomem * regs) 
{ 
#ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO 
  return big_endian_mmio(ohci) "htmlcode">

hcd->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]); 
if (IS_ERR(hcd->regs)) { 
  retval = PTR_ERR(hcd->regs); 
  goto err_put; 
} 


4、usb驱动怎么学
如果从代码结构来说，上面这段分析算是入门了。但是，如果要深入了解usb host&device驱动，那么除了这些代码逻辑，那么还要熟读usb协议手册，更重要的学会用catc协议分析仪真正地去了解usb是如何发包和收包的。


以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。