LINUX DEVICE DRIVERS 3rd edition phần 3 potx
LINUX DEVICE DRIVERS 3rd edition phần 3 potx
... 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...
LINUX DEVICE DRIVERS 3rd edition phần 1 ppt
... . . . . . . . . .
32 7
USB Device Basics 32 8
USB and Sysfs 33 3
USB Urbs 33 5
Writing a USB Driver 34 6
USB Transfers Without Urbs 35 6
Quick Reference 36 0
14. The Linux Device Model
. . . . . . ... . . .
36 2
Kobjects, Ksets, and Subsystems 36 4
Low-Level Sysfs Operations 37 1
Hotplug Event Generation 37 5
Buses, Devices, and Drivers 37 7
Classes 38 7
Putting It All T...
LINUX DEVICE DRIVERS 3rd edition phần 2 pptx
... 00002000 cf 434 f20 00000001 00000286 cf 434 f00 fffffff7
bfffda70 c27fe000 c0150612 cf 434 f00 bfffda70 00002000 cf 434 f20 00000000
000000 03 00002000 c0103f8f 000000 03 bfffda70 00002000 00002000 bfffda70
Call ... -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 $majo...
LINUX DEVICE DRIVERS 3rd edition phần 4 pdf
... these two devices, it looks something like:
% cat /proc/jiqwq
time delta preempt pid cpu command
11 130 43 0 0 7 1 events/1
11 130 43 0 0 7 1 events/1
11 130 43 0 0 7 1 events/1
11 130 43 0 0 7 1 ... bs=20 count=5 < /proc/jitqueue
2027024 2028024
2028025 2029025
2029026 2 030 026
2 030 027 2 031 027
2 031 028 2 032 028
Since the reading process (dd above) is not in the run qu...
LINUX DEVICE DRIVERS 3rd edition phần 5 pps
... from the 32 -bit system shown earlier.
CPU0 CPU1
27: 1705 34 141 IO-SAPIC-level qla1280
40: 0 0 SAPIC perfmon
43: 9 13 6960 IO-SAPIC-level eth0
47: 26722 146 IO-SAPIC-level usb-uhci
64: 3 6 IO-SAPIC-edge ... /proc/interrupts
CPU0 CPU1
0: 4848108 34 IO-APIC-edge timer
2: 0 0 XT-PIC cascade
8: 3 1 IO-APIC-edge rtc
10: 433 5 1 IO-APIC-level aic7xxx
11: 89 03 0 IO-APIC-level...
LINUX DEVICE DRIVERS 3rd edition phần 6 pps
... levels.
,ch12.1659 Page 31 8 Friday, January 21, 2005 3: 08 PM
This is the Title of the Book, eMatter Edition
Copyright © 2005 O’Reilly & Associates, Inc. All rights reserved.
33 8
|
Chapter 13: USB Drivers
URB_NO_FSBR
Used ... files.
,ch12.1659 Page 30 3 Friday, January 21, 2005 3: 08 PM
This is the Title of the Book, eMatter Edition
Copyright © 2005 O’Reilly & Associates,...
LINUX DEVICE DRIVERS 3rd edition phần 7 pps
... 14 -3. Device- creation process
driver
probe
driver
initializes
device
PCI driver
bind device
to driver
create
sysfs links
pci _device_ probe
pci_bus_match
pci_hotplug
initialize
device
register
device
dev_hotplug
bus
match
probe
register
kobject
hotplug
call_usermodehelper
Driver ... idVendor/idProduct/bcdDevice that specifies those USB
device- specific fields
TYPE
A string in the...
LINUX DEVICE DRIVERS 3rd edition phần 8 doc
... 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 work with directly, ... that describes your device. For example, it can be found as the
dev field
in
struct pci _device or struct usb _device. The device structure is covered in detail
in Chapter 14....
LINUX DEVICE DRIVERS 3rd edition phần 9 ppt
... 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...
LINUX DEVICE DRIVERS 3rd edition phần 10 pps
... 20
models (Linux device) , 36 2 36 4
buses, 37 7 38 1
classes, 38 7 39 1
devices, 38 1 38 7
firmware, 405–407
hotplugging, 37 5, 39 7–405
kobjects, 36 4 37 1
lifecycles, 39 1 39 7
low-level sysfs operations, 37 1 37 5
modes
device ... and, 1 03
linked lists, 295–299
Linux device model, 36 2 36 4
buses, 37 7 38 1
classes, 38 7 39 1
devices, 38 1 38 7
firmware, 405–407
hot...