UART configuration as GPIO

Inigo Oyarbide

Hi all,

I want to configure the UART1_RTSn pin as GP1[25] pin to control the value of the pin. I have used the sysfs application to modify the pin value, and put it to "high"; in the cat /sys/kernel/debug/gpio appear that is "high" but with the scope, it is "low".

Also I have check it with another gpio, which controls a LED, and in this case, it works properly.

I am thinking about if the problem is a loaded firmware, that changes the configuration I put for the pinmux.

Am I right? Please, some advice or idea would be ok.

The final purpose is to do it in the kernel space, to automate the pin control

BR,

Inigo

over 11 years ago

0 David Soto - RidgeRun over 11 years ago

Genius 3700 points

Hi,

I know that the firmware will overwrite the pinmux configuration, not sure if this is your case, but you can try booting the board and trying to change the pin mux after loading the firmware using the debugfs module, something like

mount -t debugfs none /sys/kernel/debug

cd /sys/kernel/debug/omap_mux

/sys/kernel/debug/omap_mux # grep -i uart1 *
uart1_ctsn:name: uart1_ctsn.gp1_io26 (0x48140adc/0xadc = 0x0003), b NA, t NA
uart1_ctsn:signals: uart1_ctsn | gpmc_a13 | gpmc_a17 | gp1_io26 | NA | NA | NA | NA
uart1_rtsn:name: uart1_rtsn.gp1_io25 (0x48140ad8/0xad8 = 0x0003), b NA, t NA
uart1_rtsn:signals: uart1_rtsn | gpmc_a14 | gpmc_a18 | gp1_io25 | NA | NA | NA | NA
uart1_rxd:name: uart1_rxd.uart1_rxd (0x48140ad0/0xad0 = 0x0000), b NA, t NA
uart1_rxd:signals: uart1_rxd | gpmc_a26 | gpmc_a20 | NA | NA | NA | NA | NA
uart1_txd:name: uart1_txd.uart1_txd (0x48140ad4/0xad4 = 0x0008), b NA, t NA
uart1_txd:signals: uart1_txd | gpmc_a25 | gpmc_a19 | NA | NA | NA | NA | NA

then use cat or echo on the files to change the mode.

-David

0 Inigo Oyarbide over 11 years ago in reply to David Soto - RidgeRun

Intellectual 720 points

Hi David,

I have configured de GP1[25] in the board-ti8168evm.c with a pull-up

TI816X_MUX(UART1_RTSN, OMAP_MUX_MODE3 | DM8168_PULL_UP), // UART1_RTS

and when I boot the board and check the pin with the scope, the value is '1', so is correct.

Nevertheless, using the sysfs program, the pin value doesn't change.

I think, I need to create a GPIO driver, inspired in the tty_io.c file maybe? Because I want to control the GPIO pin as a manual RTS.

BR,

Inigo

0 David Soto - RidgeRun over 11 years ago in reply to Inigo Oyarbide

Genius 3700 points

Hi Inigo,

so if you cat the file uart1_rtsn, do you get that your pin is configured properly? By default I get

/sys/kernel/debug/omap_mux # cat uart1_rtsn
name: uart1_rtsn.gp1_io25 (0x48140ad8/0xad8 = 0x0003), b NA, t NA
mode: OMAP_PIN_OUTPUT | OMAP_MUX_MODE3
signals: uart1_rtsn | gpmc_a14 | gpmc_a18 | gp1_io25 | NA | NA | NA | NA

It seems that it should start fine then. We have a GPIO wiki, maybe it can help you https://developer.ridgerun.com/wiki/index.php/How_to_use_GPIO_signals

0 Inigo Oyarbide over 11 years ago in reply to David Soto - RidgeRun

Intellectual 720 points

Hi David,

I get this:

name: uart1_rtsn.gp1_io25 (0x48140ad8/0xad8 = 0x0013), b NA, t NA
mode: OMAP_PIN_OUTPUT | OMAP_MUX_MODE3
signals: uart1_rtsn | gpmc_a14 | gpmc_a18 | gp1_io25 | NA | NA | NA | NA

and the Pin value is what I put ("1", high).

Nevertheless, after that, I need to control the pin as a pseudo-rts to control the uart1.

Any advice?

BR,

Inigo

0 Inigo Oyarbide over 11 years ago in reply to Inigo Oyarbide

Intellectual 720 points

Hi David,

I have done some test with the UART0 (hw shortcircuit, always "high") and UART1 (software control).

The difference between both bootlogs are that, with the UART0, I can see the complete log and can enter to the device, and with the UART1, I can only see the kernel booting but I can't access to the device.

Here are the complete logs.

UART0:

Fullscreen 0116.uart0.txt Download

U-Boot 2010.06-dirty (Mar 19 2014 - 18:30:24)

DRAM:  2 GiB
MMC:   OMAP SD/MMC: 0
Using default environment

Hit any key to stop autoboot:  0 
raise: Signal # 8 caught
reading u-boot.bin

216476 bytes read
## Starting application at 0x80800000 ...


U-Boot 2010.06-dirty (Mar 19 2014 - 18:29:46)

TI8168-GP rev 2.1

ARM clk: 987MHz
DDR clk: 796MHz

I2C:   ready
DRAM:  2 GiB
NAND:  NAND device: Manufacturer ID: 0x2c, Chip ID: 0xca (Micron NAND 256MiB 3,)
NAND bus width 8 instead 16 bit
No NAND device found!!!
0 MiB
MMC:   OMAP SD/MMC: 0
*** Warning - booting from SD, using default environment

:,;;:;:;;;;;;;;r;;:,;;:;:;;;;;;;;:,;;:;:;;;;;;;;:,;;:;:;;;;;;;;:;;;;;;;;:,;;:;:
;,;:::;;;;r;;;rssiSiS552X5252525259GX2X9hX9X9XX2325S55252i5:,;;:;:;;;;;;;;:,;;:
;:;;;;;;;rrssSsS52S22h52299GGAAMHMM#BBH#B#HMM#HMBA&&XX2255S2S5Si:,;;:;:;;;;;;;;
;:;;r;;rsrrriiXS5S329&A&MH#BMB#A&9XXA252GXiSXX39AAMMMBB&G22S5i2SSiiiisi:,;;:;:;
;;;;;r;rr2iisiih393HB#B#AA99i22irrrX3X52AGsisss2Xii2299HBMA&X2S5S5iSiisSsi:,;;:
r:r;rrsrsihXSi2&##MHB&Ahh3AGHGA9G9h&#H##@@@##MAMMXXX9SSS29&&HGGX2i5iisiiisisi:,
;;rrrrsSiiiA&ABH&A9GAGhAhBAMHA9HM@@@@@@@@@@@@@@@@@@@HHhAh2S2SX9&Gh22SSiisiiisii
r:rrssisiS2XM##&h3AGAX&3GG3Ssr5H@M#HM2; ;2X&&&MHMB###GBB#B&XXSSs529XX55iSsisisi
r;rsrisSi2XHAhX99A3XXG&&XS;:,rH#HGhAS   @@@@3rs2XBM@@A552&&AHA2XiisSS252SSsisSs
r;issi5S22&&3iSSX292&hXsr;;:;h@&G339&S9@@@@2@MA&9&HB##Xris29ABMAAX2ir;rsSi5iss5
rrsSi2XhG&9GXh399&X99i;;;;;;r#H&293H9X#@@@@@@@B&9GhAH@XrrsrsiXABHB&HG2rr;rrSiSi
;:rsisS599&AA9XG&3A35r;:::;,;BMh&&2iX5A@@@@@@@&392X5GB2;;;r;iSX393A##A&Xi:::rsi
;:rss552222X553&XHMhir;;::,:,h#HhGSXhG3#@@@@#AXXS2XAHA;::;;;;ss55XShBA3239r:,;;
r;ii2S5SSi2i53hirsh2srr::,,,,;MMXX359&Ah3h&Si59SX99A#i:,::::;;sri2,.2r;:SGAr;,:
;:;rrrrssiriXGSi::shs;;;,,,:,,rBBA9h5s5h5iS5isi2SAHB5:,,,:::;rrs5&SrisSX5Srrr:,
;,r;;;;rsriSSrrrr;;5Xrr;;,:,,.,;9AA2SsisS5323XXXG9&i:.,,::;;r;;;srrrrrr;;:;::::
:,;r;r;rrissrrr;:;::;s;;;;,:,,..,r293h222hXXAAGGGX;:,,,:,:,::;:;::,:,,,,...,,,,
;,;;;;rrrrrrrrirr;,.,,:::::::,,,,.,;SX&ABAB2hhXir:,,.,,.,,:,,,,..,,,..,..,,,..:
:.:;:;;;:;;;;r;rrs;:.. ,,:::::,:,:,,.::rrsrr;;,,.......,..,....,,,,,,,...,.,,:,
:.:::,::::::;;r;rrr;:.......,.,.,,:::,,...............,,::.,,,,:,::,,:,:,,,:,;:
,.::,:,,,,,;;;;;;;;r;;::,..............................;;;:;::::,:::::::,:,:,,,
: ,,:,,,,,,,,,,,,,:;rrr;;:;,,,,,,,::,.,.:.,.,;s,:;;;;:;:;;;;;::::,:::,:::,:,:,:
,.,,,,,,,...,,.,,....................................:,............:,,,:,:,,,,,

Net:   <ethaddr> not set. Reading from E-fuse
Detected MACID:84:7e:40:ee:63:26
Ethernet PHY: GENERIC @ 0x01
DaVinci EMAC
Hit any key to stop autoboot:  0 
raise: Signal # 8 caught
reading uEnv.txt

369 bytes read
Importing environment from mmc ...
Running uenvcmd ...
BOOTP broadcast 1
DHCP client bound to address 192.168.10.111
Using DaVinci EMAC device
TFTP from server 192.168.10.183; our IP address is 192.168.10.111
Filename 'uImage.ideatel.sdk.dm8168'.
Load address: 0x82000000
Loading: #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #######################################################
done
Bytes transferred = 2610720 (27d620 hex)
## Booting kernel from Legacy Image at 82000000 ...
   Image Name:   "RR Compressed Linux Kernel"
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    2610656 Bytes = 2.5 MiB
   Load Address: 81e00000
   Entry Point:  81e00000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Linux version 2.6.37-ridgerun (ideatel@ubuntu) (gcc version 4.3.3 (Sourcery G++4
CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7f
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: ti8168evm
vram size = 84934656 at 0x0
reserved size = 84934656 at 0x0
FB: Reserving 84934656 bytes SDRAM for VRAM
Memory policy: ECC disabled, Data cache writeback
OMAP chip is TI8168 2.0
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 152712
Kernel command line: console=ttyO0,115200n8  notifyk.vpssm3_sva=0xBF900000 root 
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 364MB 239MB = 603MB total
Memory: 605976k/605976k available, 94440k reserved, 244736K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
    vmalloc : 0xd7000000 - 0xf8000000   ( 528 MB)
    lowmem  : 0xc0000000 - 0xd6c00000   ( 364 MB)
    pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
    modules : 0xbf000000 - 0xbfe00000   (  14 MB)
      .init : 0xc0008000 - 0xc003c000   ( 208 kB)
      .text : 0xc003c000 - 0xc04f1000   (4820 kB)
      .data : 0xc04f2000 - 0xc0538500   ( 282 kB)
SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:407
IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
Total of 128 interrupts on 1 active controller
GPMC revision 6.0
Trying to install interrupt handler for IRQ400
Trying to install interrupt handler for IRQ401
Trying to install interrupt handler for IRQ402
Trying to install interrupt handler for IRQ403
Trying to install interrupt handler for IRQ404
Trying to install interrupt handler for IRQ405
Trying to install interrupt handler for IRQ406
Trying to install type control for IRQ407
Trying to set irq flags for IRQ407
OMAP clockevent source: GPTIMER1 at 27000000 Hz
Console: colour dummy device 80x30
Calibrating delay loop... 986.31 BogoMIPS (lpj=4931584)
pid_max: default: 32768 minimum: 301
Security Framework initialized
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
devtmpfs: initialized
omap_voltage_early_init: voltage driver support not added
regulator: core version 0.5
regulator: dummy: 
NET: Registered protocol family 16
omap_voltage_domain_lookup: Voltage driver init not yet happened.Faulting!
omap_voltage_add_dev: VDD specified does not exist!
OMAP GPIO hardware version 0.1
OMAP GPIO hardware version 0.1
omap_mux_init: Add partition: #1: core, flags: 0
_omap_mux_get_by_name: Could not find signal i2c2_scl.i2c2_scl
_omap_mux_get_by_name: Could not find signal i2c2_sda.i2c2_sda
NOR: Can't request GPMC CS
registered ti816x_gpio_vr device
registered ti816x_sr device
pm_dbg_init: only OMAP3 supported
registered ti81xx_vpss device
registered ti81xx_vidout device
registered ti81xx on-chip HDMI device
registered ti81xx_fb device
registered ti81xx_vin device
ti81xx_pcie: Invoking PCI BIOS...
ti81xx_pcie: Setting up Host Controller...
ti81xx_pcie: Register base mapped @0xd7020000
ti81xx_pcie: Starting PCI scan...
PCI: bus0: Fast back to back transfers enabled
bio: create slab <bio-0> at 0
regulator: VFB: 800 <--> 1025 mV at 1010 mV 
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
USBSS revision 4ea20809
registerd cppi-dma Intr @ IRQ 17
Cppi41 Init Done
omap_i2c omap_i2c.1: bus 1 rev4.0 at 100 kHz
omap_i2c omap_i2c.2: bus 2 rev4.0 at 100 kHz
Advanced Linux Sound Architecture Driver Version 1.0.23.
Switching to clocksource gp timer
musb-hdrc: version 6.0, host, debug=0
musb-hdrc musb-hdrc.0: dma type: dma-cppi41
MUSB controller-0 revision 4ea20800
musb-hdrc musb-hdrc.0: MUSB HDRC host driver
musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: MUSB HDRC host driver
usb usb1: Manufacturer: Linux 2.6.37-ridgerun musb-hcd
usb usb1: SerialNumber: musb-hdrc.0
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
musb-hdrc musb-hdrc.0: USB Host mode controller at d701e000 using DMA, IRQ 18
musb-hdrc musb-hdrc.1: dma type: dma-cppi41
MUSB controller-1 revision 4ea20800
musb-hdrc musb-hdrc.1: MUSB HDRC host driver
musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 2
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 2.6.37-ridgerun musb-hcd
usb usb2: SerialNumber: musb-hdrc.1
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
musb-hdrc musb-hdrc.1: USB Host mode controller at d7026800 using DMA, IRQ 19
NET: Registered protocol family 2
IP route cache hash table entries: 16384 (order: 4, 65536 bytes)
TCP established hash table entries: 65536 (order: 7, 524288 bytes)
TCP bind hash table entries: 65536 (order: 6, 262144 bytes)
TCP: Hash tables configured (established 65536 bind 65536)
TCP reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
NetWinder Floating Point Emulator V0.97 (double precision)
PMU: registered new PMU device of type 0
omap-iommu omap-iommu.0: ducati registered
omap-iommu omap-iommu.1: sys registered
highmem bounce pool size: 64 pages
JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
msgmni has been set to 705
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
omap_uart.0: ttyO0 at MMIO 0x48020000 (irq = 72) is a OMAP UART0
console [ttyO0] enabled
omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
brd: module loaded
loop: module loaded
ahci ahci.0: forcing PORTS_IMPL to 0x3
ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc 
scsi0 : ahci_platform
scsi1 : ahci_platform
ata1: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x100 irq 16
ata2: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x180 irq 16
m25p80 spi1.0: found m25p32, expected m25p80
m25p80 spi1.0: m25p32 (4096 Kbytes)
Creating 4 MTD partitions on "spi_flash":
0x000000000000-0x000000040000 : "U-Boot"
0x000000040000-0x000000042000 : "U-Boot Env"
mtd: partition "U-Boot Env" doesn't end on an erase block -- force read-only
0x000000042000-0x0000002c2000 : "Kernel"
mtd: partition "Kernel" doesn't start on an erase block boundary -- force read-y
0x0000002c2000-0x000000400000 : "File System"
mtd: partition "File System" doesn't start on an erase block boundary -- force y
omap2-nand driver initializing
ONFI flash detected
ONFI param page 0 valid
NAND device: Manufacturer ID: 0x2c, Chip ID: 0xca (Micron NAND 256MiB 3,3V 16-b)
Creating 5 MTD partitions on "omap2-nand.0":
0x000000000000-0x000000260000 : "U-Boot"
0x000000260000-0x000000280000 : "U-Boot Env"
0x000000280000-0x0000006c0000 : "Kernel"
0x0000006c0000-0x00000cee0000 : "File System"
0x00000cee0000-0x000010000000 : "Reserved"
davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
davinci_mdio davinci_mdio.0: detected phy mask fffffffd
davinci_mdio.0: probed
davinci_mdio davinci_mdio.0: phy[1]: device 0:01, driver unknown
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver dm9601
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
mice: PS/2 mouse device common for all mice
omap_rtc omap_rtc: rtc core: registered omap_rtc as rtc0
i2c /dev entries driver
Linux video capture interface: v2.00
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v1.0.0)
OMAP Watchdog Timer Rev 0x00: initial timeout 60 sec
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
notify_init : notify drivercreated  for  remote proc id 2 at physical Address 00
usbcore: registered new interface driver snd-usb-audio
asoc: tlv320aic3x-hifi <-> davinci-mcasp.2 mapping ok
ALSA device list:
  #0: TI81XX EVM
TCP cubic registered
NET: Registered protocol family 17
Registering the dns_resolver key type
VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
omap_voltage_late_init: Voltage driver support not added
Power Management for TI81XX.
smartreflex smartreflex: Driver initialized
omap_rtc omap_rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800)
ata2: SATA link down (SStatus 0 SControl 300)
ata1: SATA link down (SStatus 0 SControl 300)
mmc0: new high speed SD card at address 0002
mmcblk0: mmc0:0002 00000 1.90 GiB 
 mmcblk0: p1
davinci_mdio davinci_mdio.0: resetting idled controller
net eth0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:01, id=282f014)
PHY 0:02 not found
net eth1: could not connect to phy 0:02
Sending DHCP requests .
PHY: 0:01 - Link is Up - 100/Full
.
DHCP/BOOTP: Ignoring delayed packet
., OK
IP-Config: Got DHCP answer from 0.0.0.0, my address is 192.168.10.111
IP-Config: Complete:
     device=eth0, addr=192.168.10.111, mask=255.255.255.0, gw=192.168.10.254,
     host=192.168.10.111, domain=, nis-domain=(none),
     bootserver=0.0.0.0, rootserver=192.168.10.183, rootpath=
##IDEATEL: tty_open (ttyO0).  request (58) gpio
VFS: Mounted root (nfs filesystem) on device 0:15.
devtmpfs: mounted
Freeing init memory: 208K
##IDEATEL: tty_write (ttyO0) gpio[58] on-off
starting pid 52, tty '': '/etc/rcS'
Loading coprocessors modules...
  Loading cmem from 0x96C00000 to 0x98000000
CMEMK module: built on Mar  3 2014 at 17:18:18
  Reference Linux version 2.6.37
  File /home/ideatel/VIDEO-RECORDER/sdk/proprietary/ezsdk-5_05_02_00/ezsdk/compc
CMEM Range Overlaps Kernel Physical - allowing overlap
CMEM phys_start (0x96c00000) overlaps kernel (0x80000000 -> 0xa5b00000)
allocated heap buffer 0xde000000 of size 0x1400000
heap fallback enabled - will try heap if pool buffer is not available
cmemk initialized
SysLink version : 2.20.02.20
SysLink module created on Date:Mar  3 2014 Time:17:18:36
FIRMWARE: Using default Memory map
FIRMWARE: isI2cInitRequiredOnM3: 0
FIRMWARE: Default memory configuration is used
Firmware Loader debugging not configured
Default FL_DEBUG: warning
Allowed FL_DEBUG levels: error, warning, info, debug, log
MemCfg: DCMM (Dynamically Configurable Memory Map) Version :  2.1.2.1
FIRMWARE: 1 start Successful
FIRMWARE: Using default Memory map
FIRMWARE: isI2cInitRequiredOnM3: 0
FIRMWARE: Default memory configuration is used
Firmware Loader debugging not configured
Default FL_DEBUG: warning
Allowed FL_DEBUG levels: error, warning, info, debug, log
MemCfg: DCMM (Dynamically Configurable Memory Map) Version :  2.1.2.1
FIRMWARE: 2 start Successful
FIRMWARE: Using default Memory map
FIRMWARE: isI2cInitRequiredOnM3: 0
FIRMWARE: Default memory configuration is used
Firmware Loader debugging not configured
Default FL_DEBUG: warning
Allowed FL_DEBUG levels: error, warning, info, debug, log
MemCfg: DCMM (Dynamically Configurable Memory Map) Version :  2.1.2.1
FIRMWARE: 0 start Successful
VPSS_FVID2: M3 firmware version 0x1000145 is newer,driver may not work properly.
omap_i2c omap_i2c.2: controller timed out
omap_i2c omap_i2c.2: controller timed out
VPSS_DCTRL: setup 7375 filter failed
omap_i2c omap_i2c.2: controller timed out
VPSS_DCTRL: setup 7360 filter failed.
HDMI W1 rev 2.0
HDMI CEC Spec version 1.2
I2C No Ack

gs2971:    GS2971[0] init status:0 
ti81xxvin ti81xxvin: registered sub device gs2971
gs2971:    GS2971[1] init status:0 
ti81xxvin ti81xxvin: registered sub device gs2971
ti81xxvin ti81xxvin: TI81xx HDVPSS Capture driver initialized
gs2972:    GS2972[0] init status:0 
gs2972:    GS2972[1] init status:0 
Starting System
done.
Welcome to
__________ .__     .___               __________                
\______   \|__|  __| _/  ____    ____ \______   \ __ __   ____  
 |       _/|  | / __ |  / ___\ _/ __ \ |       _/|  |  \ /    \ 
 |    |   \|  |/ /_/ | / /_/  >\  ___/ |    |   \|  |  /|   |  \
 |____|_  /|__|\____ | \___  /  \___  >|____|_  /|____/ |___|  /
        \/          \//_____/       \/        \/             \/ 
           
    Embedded Linux Solutions
 
For further information see:
http://www.ridgerun.com
Build host: ubuntu
Built by: ideatel
Build date: Thu, 20 Mar 2014 18:12:22 +0100
Build tag: dm8168-tievm
Configuring network interfaces
Starting D-Bus message bus system
Starting rpcbind
NET: Registered protocol family 10
Iniciando servicio... 
VPSS_DCTRL: Set output failed on external encoder
I2C No Ack

Starting Dropbear SSH server: dropbear.
Starting NFS statd...
Starting NFS nfsd...
Starting NFS mountd...
Exporting NFS Filesystems...
##IDEATEL: tty_open (ttyO0).  request (58) gpio
##IDEATEL: error [-16] en gpio_request

process '-/bin/##IDEATEL: tty_open (ttyO0).  request (58) gpio
sh' (pid 204) ex##IDEATEL: error [-16] en gpio_request
ited. Scheduling for restart.

Please press Enter to activate this console.

UART1:

Fullscreen 6014.uart1_mode3PullUp.txt Download

Linux version 2.6.37-ridgerun (ideatel@ubuntu) (gcc version 4.3.3 (Sourcery G++ 4
CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7f
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: ti8168evm
vram size = 84934656 at 0x0
reserved size = 84934656 at 0x0
FB: Reserving 84934656 bytes SDRAM for VRAM
Memory policy: ECC disabled, Data cache writeback
OMAP chip is TI8168 2.0
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 152712
Kernel command line: console=ttyO1,115200n8  notifyk.vpssm3_sva=0xBF900000 root= 
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 364MB 239MB = 603MB total
Memory: 605976k/605976k available, 94440k reserved, 244736K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
    vmalloc : 0xd7000000 - 0xf8000000   ( 528 MB)
    lowmem  : 0xc0000000 - 0xd6c00000   ( 364 MB)
    pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
    modules : 0xbf000000 - 0xbfe00000   (  14 MB)
      .init : 0xc0008000 - 0xc003c000   ( 208 kB)
      .text : 0xc003c000 - 0xc04f1000   (4820 kB)
  2000 - 0xc0538500   ( 282 kB)
SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:407
IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
Total of 128 interrupts on 1 active controller
GPMC revision 6.0
Trying to install interrupt handler for IRQ400
Trying to install interrupt handler for IRQ401
Trying to install interrupt handler for IRQ402
Trying to install interrupt handler for IRQ403
Trying to install interrupt handler for IRQ404
Trying to install interrupt handler for IRQ405
Trying to install interrupt handler for IRQ406
Trying to install type control for IRQ407
Trying to set irq flags for IRQ407
OMAP clockevent source: GPTIMER1 at 27000000 Hz
Console: colour dummy device 80x30
Calibrating delay loop... 986.31 BogoMIPS (lpj=4931584)
pid_max: default: 32768 minimum: 301
Security Framework initialized
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
devtmpfs: initialized
omap_voltage_early_init: voltage driver support not added
regulator: core version 0.5
regulator: dummy: 
NET: Registered protocol family 16
omap_voltage_domain_lookup: Voltage driver init not yet happened.Faulting!
omap_voltage_add_dev: VDD specified does not exist!
OMAP GPIO hardware version 0.1
OMAP GPIO hardware version 0.1
omap_mux_init: Add partition: #1: core, flags: 0
_omap_mux_get_by_name: Could not find signal i2c2_scl.i2c2_scl
_omap_mux_get_by_name: Could not find signal i2c2_sda.i2c2_sda
NOR: Can't request GPMC CS
registered ti816x_gpio_vr device
registered ti816x_sr device
pm_dbg_init: only OMAP3 supported
registered ti81xx_vpss device
registered ti81xx_vidout device
registered ti81xx on-chip HDMI device
registered ti81xx_fb device
registered ti81xx_vin device
ti81xx_pcie: Invoking PCI BIOS...
ti81xx_pcie: Setting up Host Controller...
ti81xx_pcie: Register base mapped @0xd7020000
ti81xx_pcie: Starting PCI scan...
PCI: bus0: Fast back to back transfers enabled
bio: create slab <bio-0> at 0
regulator: VFB: 800 <--> 1025 mV at 1010 mV 
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
USBSS revision 4ea20809
registerd cppi-dma Intr @ IRQ 17
Cppi41 Init Done
omap_i2c omap_i2c.1: bus 1 rev4.0 at 100 kHz
omap_i2c omap_i2c.2: bus 2 rev4.0 at 100 kHz
Advanced Linux Sound Architecture Driver Version 1.0.23.
Switching to clocksource gp timer
musb-hdrc: version 6.0, host, debug=0
musb-hdrc musb-hdrc.0: dma type: dma-cppi41
MUSB controller-0 revision 4ea20800
musb-hdrc musb-hdrc.0: MUSB HDRC host driver
musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: MUSB HDRC host driver
usb usb1: Manufacturer: Linux 2.6.37-ridgerun musb-hcd
usb usb1: SerialNumber: musb-hdrc.0
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
musb-hdrc musb-hdrc.0: USB Host mode controller at d701e000 using DMA, IRQ 18
musb-hdrc musb-hdrc.1: dma type: dma-cppi41
MUSB controller-1 revision 4ea20800
musb-hdrc musb-hdrc.1: MUSB HDRC host driver
musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 2
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 2.6.37-ridgerun musb-hcd
usb usb2: SerialNumber: musb-hdrc.1
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
musb-hdrc musb-hdrc.1: USB Host mode controller at d7026800 using DMA, IRQ 19
NET: Registered protocol family 2
IP route cache hash table entries: 16384 (order: 4, 65536 bytes)
TCP established hash table entries: 65536 (order: 7, 524288 bytes)
TCP bind hash table entries: 65536 (order: 6, 262144 bytes)
TCP: Hash tables configured (established 65536 bind 65536)
TCP reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
NetWinder Floating Point Emulator V0.97 (double precision)
PMU: registered new PMU device of type 0
omap-iommu omap-iommu.0: ducati registered
omap-iommu omap-iommu.1: sys registered
highmem bounce pool size: 64 pages
JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
msgmni has been set to 705
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
omap_uart.0: ttyO0 at MMIO 0x48020000 (irq = 72) is a OMAP UART0
omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
console [ttyO1] enabled
omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
brd: module loaded
loop: module loaded
ahci ahci.0: forcing PORTS_IMPL to 0x3
ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc 
scsi0 : ahci_platform
scsi1 : ahci_platform
ata1: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x100 irq 16
ata2: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x180 irq 16
m25p80 spi1.0: found m25p32, expected m25p80
m25p80 spi1.0: m25p32 (4096 Kbytes)
Creating 4 MTD partitions on "spi_flash":
0x000000000000-0x000000040000 : "U-Boot"
0x000000040000-0x000000042000 : "U-Boot Env"
mtd: partition "U-Boot Env" doesn't end on an erase block -- force read-only
0x000000042000-0x0000002c2000 : "Kernel"
mtd: partition "Kernel" doesn't start on an erase block boundary -- force read-oy
0x0000002c2000-0x000000400000 : "File System"
mtd: partition "File System" doesn't start on an erase block boundary -- force ry
omap2-nand driver initializing
ONFI flash detected
ONFI param page 0 valid
NAND device: Manufacturer ID: 0x2c, Chip ID: 0xca (Micron NAND 256MiB 3,3V 16-bi)
Creating 5 MTD partitions on "omap2-nand.0":
0x000000000000-0x000000260000 : "U-Boot"
0x000000260000-0x000000280000 : "U-Boot Env"
0x000000280000-0x0000006c0000 : "Kernel"
0x0000006c0000-0x00000cee0000 : "File System"
0x00000cee0000-0x000010000000 : "Reserved"
davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
davinci_mdio davinci_mdio.0: detected phy mask fffffffd
davinci_mdio.0: probed
davinci_mdio davinci_mdio.0: phy[1]: device 0:01, driver unknown
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver dm9601
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
mice: PS/2 mouse device common for all mice
omap_rtc omap_rtc: rtc core: registered omap_rtc as rtc0
i2c /dev entries driver
Linux video capture interface: v2.00
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v1.0.0)
OMAP Watchdog Timer Rev 0x00: initial timeout 60 sec
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
notify_init : notify drivercreated  for  remote proc id 2 at physical Address 0x0
usbcore: registered new interface driver snd-usb-audio
asoc: tlv320aic3x-hifi <-> davinci-mcasp.2 mapping ok
ALSA device list:
  #0: TI81XX EVM
TCP cubic registered
NET: Registered protocol family 17
Registering the dns_resolver key type
VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
omap_voltage_late_init: Voltage driver support not added
Power Management for TI81XX.
smartreflex smartreflex: Driver initialized
omap_rtc omap_rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800)
ata2: SATA link down (SStatus 0 SControl 300)
ata1: SATA link down (SStatus 0 SControl 300)
mmc0: new high speed SD card at address 0002
mmcblk0: mmc0:0002 00000 1.90 GiB 
 mmcblk0: p1
davinci_mdio davinci_mdio.0: resetting idled controller
net eth0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:01, id=282f014)
PHY 0:02 not found
net eth1: could not connect to phy 0:02
Sending DHCP requests .
PHY: 0:01 - Link is Up - 100/Full
.
DHCP/BOOTP: Ignoring delayed packet
., OK
IP-Config: Got DHCP answer from 0.0.0.0, my address is 192.168.10.111
IP-Config: Complete:
     device=eth0, addr=192.168.10.111, mask=255.255.255.0, gw=192.168.10.254,
     host=192.168.10.111, domain=, nis-domain=(none),
     bootserver=0.0.0.0, rootserver=192.168.10.183, rootpath=
##IDEATEL: tty_open (ttyO1).  request (56) gpio
VFS: Mounted root (nfs filesystem) on device 0:15.
devtmpfs: mounted
Freeing init memory: 208K
##IDEATEL: tty_write (ttyO1) gpio[56] on-off
starting pid 52, tty '': '/etc/rcS'
Loading coprocessors modules...
  Loading cmem from 0x96C00000 to 0x98000000
CMEMK module: built on Mar  3 2014 at 17:18:18
  Reference Linux version 2.6.37
  File /home/ideatel/VIDEO-RECORDER/sdk/proprietary/ezsdk-5_05_02_00/ezsdk/compoc
CMEM Range Overlaps Kernel Physical - allowing overlap
CMEM phys_start (0x96c00000) overlaps kernel (0x80000000 -> 0xa5b00000)
allocated heap buffer 0xde000000 of size 0x1400000
heap fallback enabled - will try heap if pool buffer is not available
cmemk initialized
SysLink version : 2.20.02.20
SysLink module created on Date:Mar  3 2014 Time:17:18:36
FIRMWARE: Using default Memory map
FIRMWARE: isI2cInitRequiredOnM3: 0
FIRMWARE: Default memory configuration is used
Firmware Loader debugging not configured
Default FL_DEBUG: warning
Allowed FL_DEBUG levels: error, warning, info, debug, log
MemCfg: DCMM (Dynamically Configurable Memory Map) Version :  2.1.2.1
FIRMWARE: 1 start Successful
FIRMWARE: Using default Memory map
FIRMWARE: isI2cInitRequiredOnM3: 0
FIRMWARE: Default memory configuration is used
Firmware Loader debugging not configured
Default FL_DEBUG: warning
Allowed FL_DEBUG levels: error, warning, info, debug, log
MemCfg: DCMM (Dynamically Configurable Memory Map) Version :  2.1.2.1
FIRMWARE: 2 start Successful
FIRMWARE: Using default Memory map
FIRMWARE: isI2cInitRequiredOnM3: 0
FIRMWARE: Default memory configuration is used
Firmware Loader debugging not configured
Default FL_DEBUG: warning
Allowed FL_DEBUG levels: error, warning, info, debug, log
MemCfg: DCMM (Dynamically Configurable Memory Map) Version :  2.1.2.1
FIRMWARE: 0 start Successful
VPSS_FVID2: M3 firmware version 0x1000145 is newer,driver may not work properly.
omap_i2c omap_i2c.2: controller timed out
omap_i2c omap_i2c.2: controller timed out
VPSS_DCTRL: setup 7375 filter failed
omap_i2c omap_i2c.2: controller timed out
VPSS_DCTRL: setup 7360 filter failed.
HDMI W1 rev 2.0
HDMI CEC Spec version 1.2
I2C No Ack

gs2971:    GS2971[0] init status:0 
ti81xxvin ti81xxvin: registered sub device gs2971
gs2971:    GS2971[1] init status:0 
ti81xxvin ti81xxvin: registered sub device gs2971
ti81xxvin ti81xxvin: TI81xx HDVPSS Capture driver initialized
gs2972:    GS2972[0] init status:0 
gs2972:    GS2972[1] init status:0 
Starting System
done.
Welcome to
__________ .__     .___               __________                
\______   \|__|  __| _/  ____    ____ \______   \ __ __   ____  
 |       _/|  | / __ |  / ___\ _/ __ \ |       _/|  |  \ /    \ 
 |    |   \|  |/ /_/ | / /_/  >\  ___/ |    |   \|  |  /|   |  \
 |____|_  /|__|\____ | \___  /  \___  >|____|_  /|____/ |___|  /
        \/          \//_____/       \/        \/             \/ 
           
    Embedded Linux Solutions
 
For further information see:
http://www.ridgerun.com
Build host: ubuntu
Built by: ideatel
Build date: Thu, 20 Mar 2014 18:12:22 +0100
Build tag: dm8168-tievm
Configuring network interfaces
Starting D-Bus message bus system
Starting rpcbind
NET: Registered protocol family 10
Iniciando servicio... 
VPSS_DCTRL: Set output failed on external encoder
I2C No Ack

Starting Dropbear SSH server: dropbear.
Starting NFS statd...
Starting NFS nfsd...
Starting NFS mountd...
Exporting NFS Filesystems...
##IDEATEL: tty_open (ttyO0).  request (58) gpio
##IDEATEL: tty_write (ttyO0) gpio[58] on-off

BR,

Inigo

Processors

Processors forum

UART configuration as GPIO