LPI Linux Certification/Configure Communication Devices

Configure Communication Devices Detailed Objective Weight: 1 Description Candidates should be able to install and configure different internal and external communication devices like modems, ISDN adapters and DSL modems. Key knowledge area(s): Verification of compatibility requirements (such as the modem is not a "winmodem"). Correctly set IRQs, DMAs and I/O Ports of the cards to avoid conflicts between devices. Load and configure suitable device drivers. Set serial port speed. Setup modem for outbound PPP connections. The following is a partial list of the used files, terms and utilities: /proc/dma /proc/interrupts /proc/ioports setserial I/O Ports To list the I/O ports the system uses, print the /proc/ioports file. $ cat /proc/ioports 0000-001f : dma1 0020-003f : pic1 0040-005f : timer 0060-006f : keyboard 0070-007f : rtc 0080-008f : dma page reg 00a0-00bf : pic2 00c0-00df : dma2 00f0-00ff : fpu 0170-0177 : PCI device 8086:248a 0170-0177 : ide1 01f0-01f7 : PCI device 8086:248a 01f0-01f7 : ide0 02f8-02ff : serial(auto) 0376-0376 : PCI device 8086:248a 0376-0376 : ide1 0378-037a : parport0 037b-037f : parport0 03c0-03df : vesafb 03f6-03f6 : PCI device 8086:248a 03f6-03f6 : ide0 Interrupts To list all the interrupts used by all the devices, print the /proc/interrupts file. $ cat /proc/interrupts CPU0 0: 397517 XT-PIC timer 1: 7544 XT-PIC keyboard 2: 0 XT-PIC cascade 5: 0 XT-PIC usb-uhci, usb-uhci 8: 2 XT-PIC rtc 10: 2024 XT-PIC eth0, usb-uhci, PCI device 104c:ac51, PCI device 104c:ac51, Intel ICH3 12: 19502 XT-PIC PS/2 Mouse 14: 11445 XT-PIC ide0 15: 2770 XT-PIC ide1 NMI: 0 ERR: 0 An optimized system will not have any interrupt lines used by more than one heavily-used device. Remember that every ISR from every device will be executed for each interrupt. DMA To list all the ISA DMA (Direct Memory Access) channels in-use, print out the /proc/dma file. $ cat /proc/dma 4: cascade PCI To list all the devices on the pci buses, print out the /proc/pci file. $ cat /proc/pci PCI devices found: Bus 0, device 0, function 0: Class 0600: PCI device 8086:3575 (rev 2). Prefetchable 32 bit memory at 0xe0000000 [0xefffffff]. Bus 0, device 1, function 0: Class 0604: PCI device 8086:3576 (rev 2). Master Capable. Latency=96. Min Gnt=12. Bus 0, device 29, function 0: Class 0c03: PCI device 8086:2482 (rev 1). IRQ 10. I/O at 0x1800 [0x181f]. Bus 0, device 29, function 1: Class 0c03: PCI device 8086:2484 (rev 1). IRQ 5. I/O at 0x1820 [0x183f]. Bus 0, device 29, function 2: Class 0c03: PCI device 8086:2487 (rev 1). IRQ 5. I/O at 0x1840 [0x185f]. Bus 0, device 30, function 0: Class 0604: PCI device 8086:2448 (rev 65). Master Capable. No bursts. Min Gnt=4. Exercises Exercises results linux