LINUX DEVICE DRIVERS 3rd edition phần 8 doc

... the issue of 8- bit versus 16-bit data transfers. If you are writing device drivers for ISA device boards, you should find the relevant informa- tion in the hardware manuals for the devices. The ... below require a pointer to a struct device. This structure is the low-level representation of a device within the Linux device model. It is not something that drivers often have to...

Ngày tải lên: 09/08/2014, 04:21

... of the Book, eMatter Edition Copyright © 2005 O’Reilly & Associates, Inc. All rights reserved. 8 | Chapter 1: An Introduction to Device Drivers In addition to device drivers, other functionalities, ... mechanism. ,ch01.21 68 Page 9 Thursday, January 20, 2005 9:21 AM Linux Device Drivers, Third Edition by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman Copyrig...

Ngày tải lên: 09/08/2014, 04:21

... -f /dev/$ {device} [0-3] major=$(awk "\\$2= =\"$module\" {print \\$1}" /proc/devices) mknod /dev/$ {device} 0 c $major 0 mknod /dev/$ {device} 1 c $major 1 mknod /dev/$ {device} 2 ... the cdev structure, num is the first device number to which this device responds, and count is the number of device numbers that should be associated with the device. Often count is on...

Ngày tải lên: 09/08/2014, 04:21

... scull_nr_devs; i++) { scull_devices[i].quantum = scull_quantum; scull_devices[i].qset = scull_qset; init_MUTEX(&scull_devices[i].sem); scull_setup_cdev(&scull_devices[i], i); } Note that ... implementing device control this way is that the user can control the device just by writing data, without needing to use (or sometimes write) programs built just for configuring the dev...

Ngày tải lên: 09/08/2014, 04:21

... be called in the open method of any device that does not support seeking. Such devices should also use no_llseek as their llseek method. ,ch06 .87 19 Page 182 Friday, January 21, 2005 10:44 AM This ... under load: phon% dd bs=20 count=5 < /proc/jitqueue 2027024 20 280 24 20 280 25 2029025 2029026 2030026 2030027 2031027 20310 28 20320 28 Since the reading process (dd above) is not...

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... 484 81 08 34 IO-APIC-edge timer 2: 0 0 XT-PIC cascade 8: 3 1 IO-APIC-edge rtc 10: 4335 1 IO-APIC-level aic7xxx 11: 89 03 0 IO-APIC-level uhci_hcd 12: 49 1 IO-APIC-edge i8042 NMI: 0 0 LOC: 484 8 187 ... IO-APIC-level aic7xxx 11: 89 03 0 IO-APIC-level uhci_hcd 12: 49 1 IO-APIC-edge i8042 NMI: 0 0 LOC: 484 8 187 484 8 186 ERR: 0 MIS: 0 The first column is the IRQ number. You can see...

Ngày tải lên: 09/08/2014, 04:21

... Interface | 305 00 38 00 48 0049 004a 0060 00 78 0 080 0090 00 98 00a0 $ tree /sys/bus/pci/devices/ /sys/bus/pci/devices/ | 0000:00:00.0 -> / / /devices/pci0000:00/0000:00:00.0 | 0000:00:00.1 -> / / /devices/pci0000:00/0000:00:00.1 | ... device, control how that single device looks to the host computer as a USB device. As the term “USB device drivers is very confus- ing, the...

Ngày tải lên: 09/08/2014, 04:21

... idVendor/idProduct/bcdDevice that specifies those USB device- specific fields TYPE A string in the format bDeviceClass/bDeviceSubClass/bDeviceProtocol that speci- fies those USB device- specific fields If the bDeviceClass ... the usual pair of functions: int device_ create_file(struct device *device, struct device_ attribute *entry); void device_ remove_file(struct device *dev, st...

Ngày tải lên: 09/08/2014, 04:21

... for fiber-channel devices, alloc_fddidev (< ;linux/ fddidevice.h>) for FDDI devices, or alloc_trdev (< ;linux/ trdevice.h>) for token ring devices. snull could use alloc_etherdev without ... Writers of drivers for other types of devices may want to take advantage of one of the other helper functions, such as alloc_fcdev (defined in < ;linux/ fcdevice.h>) for fiber-channel de...

Ngày tải lên: 09/08/2014, 04:21

... *f_dentry (struct file field), 54 struct device fields, 381 struct device *parent field, 381 struct device_ driver *driver field, 382 struct device_ driver structure, 385 struct file, 53 struct file_operations ... (USB), 341 structures bin_attribute, 374 bio, 482 , 487 bus_type, 3 78 cdev configuration, 56 data, 49, 49–53 devices, 383 dev_mc_list, 5 38 drivers, 386 file_operat...

Ngày tải lên: 09/08/2014, 04:21