[mythtv-users] Can't get LIRC to work with my Serial card - IRQ tied up?
Jay Mallar
jaymallar at gmail.com
Sat Sep 22 15:43:03 UTC 2007
First, I realize this isn't necessarily a good topic for this list, but
I'm sort of stuck on what to do next. My problem isn't really with IRC,
I don't think it's with my serial card, and I just don't know where to turn.
My machine:
Motherboard: Asus P5N32-E SLI Plus
http://usa.asus.com/products.aspx?l1=3&l2=11&l3=495&l4=0&model=1567&modelmenu=1
4 PCI-e Serial Port Card:
http://www.qualitycables.com/productdetails1.cfm?sku=CM-4SRS232&cats=99172&catid=495%2C538%2C472%2C538%2C882%2C909
Homebrew Serial IR Receiver:
http://www.irblaster.info/receiver.html
Everything seems to be recognized by my machine during startup:
...
Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
ACPI: PCI Interrupt Link [APC6] enabled at IRQ 16
ACPI: PCI Interrupt 0000:0a:00.0[A] -> Link [APC6] -> GSI 16 (level,
low) -> IRQ 16
ttyS0: detected caps 00000700 should be 00000100
0000:0a:00.0: ttyS0 at I/O 0x5f00 (irq = 16) is a 16C950/954
ttyS1: detected caps 00000700 should be 00000100
0000:0a:00.0: ttyS1 at I/O 0x5f08 (irq = 16) is a 16C950/954
ttyS2: detected caps 00000700 should be 00000100
0000:0a:00.0: ttyS2 at I/O 0x5f10 (irq = 16) is a 16C950/954
ttyS3: detected caps 00000700 should be 00000100
0000:0a:00.0: ttyS3 at I/O 0x5f18 (irq = 16) is a 16C950/954
...
lspci -v shows:
0a:00.0 Serial controller: Oxford Semiconductor Ltd OX16PCI954 (Quad
16950 UART) function 0 (Uart) (prog-if 06 [16950])
Subsystem: Oxford Semiconductor Ltd Unknown device 0000
Flags: medium devsel, IRQ 16
I/O ports at 5f00 [size=32]
Memory at ef1ff000 (32-bit, non-prefetchable) [size=4K]
I/O ports at 5e00 [size=32]
Memory at ef1fe000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [40] Power Management version 1
0a:00.1 Parallel controller: Oxford Semiconductor Ltd OX16PCI954 (Quad
16950 UART) function 1 (parallel port) (prog-if 01 [BiDir])
Subsystem: Oxford Semiconductor Ltd Unknown device 0000
Flags: medium devsel, IRQ 16
I/O ports at 5d00 [size=8]
I/O ports at 5c00 [size=8]
I/O ports at 5b00 [size=32]
Memory at ef1fd000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [40] Power Management version 1
I have my IR receiver hooked to the first serial port, which I believe
is at 0x5f00 IRQ 16.
I'm using the latest CVS LIRC drivers (which appear to be 0.8.3).
When running setup.sh, I told the tool I'm using a homebrew IR receiver
configured at 0x5f00 IRQ 16 (I chose the Other option to configure my
values rather than choose the COM1 option which defaulted to a different
address):
I did get the msg:
You will have to use the lirc_serial kernel module.
Ran 'make' and 'make install' which did install the lirc_serial.ko file.
Now to load everything up. First the modules:
'modprobe lirc_serial' returned with no errors and the following in my log:
Sep 22 10:35:46 localhost kernel: lirc_dev: IR Remote Control driver
registered, at major 61
Sep 22 10:35:46 localhost kernel: lirc_serial: auto-detected active low
receiver
Sep 22 10:35:46 localhost kernel: lirc_dev: lirc_register_plugin:
sample_rate: 0
The sample rate seemed weird to me - but I let that go for now.
:lsmod | grep irc
lirc_serial 17156 0
lirc_dev 18676 1 lirc_serial
Now I run lircd:
:lircd
It returns immediately without error. Logs show:
Sep 22 10:38:33 localhost lircd-0.8.3-CVS[31147]: lircd(serial) ready
Okay - should be good to go now, so I try 'irw' to test it:
:irw
This also returns immediately with no error, but this in the logs:
Sep 22 10:39:25 localhost kernel: lirc_serial: IRQ 16 busy
Sep 22 10:39:25 localhost lircd-0.8.3-CVS[31147]: default_init(): Device
or resource busy
Sep 22 10:39:25 localhost lircd-0.8.3-CVS[31147]: caught signal
And that's where I get stuck. I do think my problem is IRQ 16 being
busy, but just not sure how to fix it.
Here's some other info:
:cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 1843 0 0 0 IO-APIC-edge timer
1: 276 0 997 0 IO-APIC-edge i8042
8: 0 0 0 0 IO-APIC-edge rtc0
9: 0 0 0 0 IO-APIC-fasteoi acpi
12: 2838 0 2639 0 IO-APIC-edge i8042
14: 0 0 0 0 IO-APIC-edge libata
15: 0 0 0 0 IO-APIC-edge libata
16: 19731235 0 13793052 0 IO-APIC-fasteoi nvidia
17: 18967670 0 55609 0 IO-APIC-fasteoi
ohci_hcd:usb1, sata_nv
18: 0 0 0 0 IO-APIC-fasteoi
ehci_hcd:usb2
19: 81751 5388 110312 0 IO-APIC-fasteoi sata_nv
20: 7157 0 18186 0 IO-APIC-fasteoi
sata_nv, HDA Intel
21: 2128 0 1768 0 IO-APIC-fasteoi
firewire_ohci
22: 1732 0 210608 0 IO-APIC-fasteoi ivtv0
214: 1654 0 0 25535507 PCI-MSI-edge eth0
NMI: 0 0 0 0
LOC: 24847603 20553428 29031709 24752948
ERR: 1
MIS: 0
:cat /proc/ioports
0000-001f : dma1
0020-0021 : pic1
0040-0043 : timer0
0050-0053 : timer1
0060-006f : keyboard
0070-0073 : rtc0
0080-008f : dma page reg
00a0-00a1 : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : 0000:00:0d.0
0170-0177 : libata
01f0-01f7 : 0000:00:0d.0
01f0-01f7 : libata
0376-0376 : 0000:00:0d.0
0376-0376 : libata
03c0-03df : vga+
03f6-03f6 : 0000:00:0d.0
03f6-03f6 : libata
0960-0967 : 0000:00:0e.1
0960-0967 : libata
0970-0977 : 0000:00:0e.0
0970-0977 : libata
09e0-09e7 : 0000:00:0e.1
09e0-09e7 : libata
09f0-09f7 : 0000:00:0e.0
09f0-09f7 : libata
0b60-0b63 : 0000:00:0e.1
0b60-0b63 : libata
0b70-0b73 : 0000:00:0e.0
0b70-0b73 : libata
0be0-0be3 : 0000:00:0e.1
0be0-0be3 : libata
0bf0-0bf3 : 0000:00:0e.0
0bf0-0bf3 : libata
0cf8-0cff : PCI conf1
1000-107f : pnp 00:01
1000-1003 : ACPI PM1a_EVT_BLK
1004-1005 : ACPI PM1a_CNT_BLK
1008-100b : ACPI PM_TMR
101c-101c : ACPI PM2_CNT_BLK
1020-1027 : ACPI GPE0_BLK
1080-10ff : pnp 00:01
1400-147f : pnp 00:01
1480-14ff : pnp 00:01
14a0-14af : ACPI GPE1_BLK
1800-187f : pnp 00:01
1880-18ff : pnp 00:01
1c00-1c3f : 0000:00:0a.1
1c00-1c3f : nForce2_smbus
1c80-1cbf : 0000:00:0a.1
1c80-1cbf : nForce2_smbus
4000-4fff : PCI Bus #0b
5000-5fff : PCI Bus #09
5000-5fff : PCI Bus #0a
5b00-5b1f : 0000:0a:00.1
5c00-5c07 : 0000:0a:00.1
5d00-5d07 : 0000:0a:00.1
5d00-5d02 : parport0
5e00-5e1f : 0000:0a:00.0
5f00-5f1f : 0000:0a:00.0
5f00-5f07 : lirc_serial
5f08-5f0f : serial
5f10-5f17 : serial
5f18-5f1f : serial
6000-6fff : PCI Bus #08
7000-7fff : PCI Bus #07
8000-8fff : PCI Bus #06
9000-9fff : PCI Bus #05
a000-afff : PCI Bus #03
b000-bfff : PCI Bus #02
c000-cfff : PCI Bus #04
cf00-cf7f : 0000:04:0b.0
d000-dfff : PCI Bus #01
eb00-eb07 : 0000:00:12.0
eb00-eb07 : forcedeth
ec00-ec07 : 0000:00:11.0
ec00-ec07 : forcedeth
ed00-ed0f : 0000:00:0e.2
ed00-ed0f : libata
ee00-ee03 : 0000:00:0e.2
ee00-ee03 : libata
ef00-ef07 : 0000:00:0e.2
ef00-ef07 : libata
f000-f003 : 0000:00:0e.2
f000-f003 : libata
f100-f107 : 0000:00:0e.2
f100-f107 : libata
f200-f20f : 0000:00:0e.1
f200-f20f : libata
f700-f70f : 0000:00:0e.0
f700-f70f : libata
fc00-fc0f : 0000:00:0d.0
fc00-fc0f : libata
ff00-ff3f : 0000:00:0a.1
The IO port output looks good, but the IRQ output appears to have
assigned IRQ 16 to nvidia. I do have aN NVidia GeForce 6200 installed
as my video card (which works perfectly).
So if I had to guess, I'm hitting an IRQ sharing issue, but not sure how
to correct it. Neither my Video card not my Serial port card have any
jumpers or any ability to change IRQs via the hardware.
Suggestions?
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