How to write a platform driver

 · Networking driver samples. The driver samples in this directory provide a starting point for writing a custom network driver for your device. An application that demonstrates how to use INetCfg APIs to enumerate, install, uninstall, bind and unbind network components. Demonstrates a simple controller-less modem driver.  · Provides sample code for a set of drivers that conform to the Windows Driver Model (WDM). This sample also includes sample installation software. tracedrv. Shows how to use WPP software tracing. UMDF Driver Skeleton Sample. This sample demonstrates how to use version 1 of the User-Mode Driver Framework to write a minimal driver. Rather than knowing that a platform needs to map an object (typically a memory buffer) into a special DMA area of the kernel address space, device drivers instead allocate DMA resources for the object. The DMA routines then perform any platform-specific operations needed to .

#include #include MODULE_LICENSE("GPL"); int ourinitmodule(void) { printk(KERN_ALERT " Welcome to sample Platform driver. "); return 0; } void ourcleanupmodule(void) { printk(KERN_ALERT " www.doorway.rug sample Platform driver "); return; } module_init(ourinitmodule); module_exit(ourcleanupmodule);. static int device_file_major_number = 0; static const char device_name[] = "Simple-driver"; int register_device(void) { int result = 0; printk(KERN_NOTICE "Simple-driver: register_device() is called. "); result = register_chrdev(0, device_name, simple_driver_fops); if(result driver: can\'t register character device with error code = %i ", result); return result; } device_file_major_number = result; printk(KERN_NOTICE "Simple-driver: registered. drivers/net/ethernet/smsc/smscx.c static struct platform_driver smcx_driver = {.probe = smcx_drv_probe,.remove = smcx_drv_remove,.suspend = smcx_drv_suspend,.resume = smcx_drv_resume,.driver = {.name = CARDNAME,.owner = THIS_MODULE, }, }; Above is a driver for platform device (smsc based Ethernet controller) and platform devices are devices which are not probed automatically during system boot-up unlike legacy devices sitting on the pci bus.

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