realtek usb 2 0 driver

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Linux Device Driver Learning (17)-USB driver (2)

; // process the transmitter information; used for low-speed, full-speed devices, and high-speed hubint ttport; // The device port unsigned int toggle located in the TT hub [2]; // occupies one position for each endpoint, indicates the direction of the endpoint ([0] = In, [1] = out) struct usb_device * parent; // The upper-level hub pointer struct usb_bus * bus; // The bus pointer struct usb_host_endpoint e

USB device driver 3: Root hub daemon 2

the kick_khubd function, add the current hub to the Hub driver queue hub_event_list, and then wake up the hub daemon wake_up (khubd_wait) to start parsing what happened to the hub. 3. After hub_thread is awakened, It will be executed and hub_events will also be executed. 4. hub_events is the main function used to analyze hub events. The content of hub analysis is executed here. This function is a large endless loop. 5. hub_events processing process 5

EZ-USB fx2 LP CY7C68013A Development Guide (2)-control transmission endpoint 0, ep0, ep0buf

Endpoint 0 is the best way to test the driver, I will later put the Linux driver experience, this buddy wrote how to send data: http://www.lcsky.org/2.0/node/43 Control transmission is useful when a small amount of control information is exchanged, such as sending commands and obtaining the status of the lower computer. It is convenient to use control transmissi

Android4.0 Process Analysis of the driver layer for USB mounting to the kernel (2)

Analysis on the process of mounting the kernel driver layer to android4.0 USB (I) 1. supported_functions static struct android_usb_function *supported_functions[] = {rmnet_smd_function,rmnet_sdio_function,rmnet_smd_sdio_function,rmnet_function,diag_function,serial_function,adb_function,ccid_function,//acm_function,mtp_function,ptp_function,rndis_function,mass_storage_function,accessory_function,NULL}; Sinc

Technical Summary of USB driver development (2)

2. Development of USB interface drivers 1. Hierarchy of devices and drivers The WDM model uses a layered structure. The right side of the figure is a device object stack. A device object is a data structure created by the system to help software manage hardware. A physical hardware can have multiple such data structures. Fdo

USB device driver 2: Root hub daemon 1

Execute PS-A | grep khubd on the terminal, and the khubd process is displayed. This is the hub daemon process. Our device is inserted into the USB interface (whether it is inserted with the hub, after the sub-hub), the daemon detects the issue and then notifies the master controller of the interruption. The master controller then calls the hub detection function to parse the device. After the hub driver is

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