DM8148: MUBS usb2phy rxcalibration failed

Hi, Pavel,

Thanks for your quick response. What I have done is as followed:
1) Download the latest kernel source ( ti81xx-master ) as you mentioned and extract it.
2) Copy the whole musb driver folder (driver\usb\musb ) into our source tree.
3) Copy the following two files into our source tree and overwrite the old files to resolve the compile error.
arch\arm\plat-omap\include\plat\usb.h
arch\arm\mach-omap2\usb-musb.c

Since we already made a lot of changes from EZSDK base code for our custom HW board, we cannot directly build the ti81xx-master and run on our board.

Do you have any other suggestion?

In addition, I tried to search the following register in dm8148 datasheet and TRM but I cannot find it:
#define USB2PHY_RXCALIB_REG_OFFS 0x304

Any idea on which doc it is defined?

Thanks,
Shunnian

Shunnian,

When I try the latest ti81xx linux kernel on the DM814x TI EVM, I have successful USB Init:

musb-hdrc: version 6.0, host, debug=0

musb-hdrc musb-hdrc.0: dma type: dma-cppi41

MUSB controller-0 revision 4ea20800

usb2phy: computed values rxcalib(15)DACs(30 15 15)

usb2phy: override computed values rxcalib(15)DACs(30 15 15)

usb2phy_config: musb(0) rxcalib done, rxcalib read value 6f6f5f7e

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 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

usb2phy: computed values rxcalib(15)DACs(28 13 14)

usb2phy: override computed values rxcalib(15)DACs(28 13 14)

usb2phy_config: musb(1) rxcalib done, rxcalib read value 6f6e5b76

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 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

Do you have USB device attached to the DM814x board USB ports during linux kernel boot/load? What is your DM814x device silicon revision?

Regards,
Pavel

Hi, Pavel,

Glad to know that the latest code worked in EVM. Thanks for your test.

Yes, we have one camera connected to usb0 and one microchip 2-ports hub connected to usb1 to add one more usb port to the system.

The part number is TMS320DM8148SCYEA0. So, the silicon revision should be revision 3.0 (video security).

Regards,
Shunnian

Shunnian,

Can you try to boot/load the latest kernel without plug/attach any external USB devices to the DM814x board USB ports, is there any difference?

One other suggestion is to revert back the USB related patches one by one and to check which one exactly is causing this error.

BR
Pavel

Hi, Pavel,

Thank you for the info on registers.

I also did the test by removing the camera and disabling the hub connected to usb0 and usb1. There is no difference and still failed.

As for the suggestion to revert the patch one by one, it will take some time to work it out.

For quick test/debug, I do the following:

1) print the default rxcalib regval before error printing as followed:

default rxcalib regval 00000000

Why the value is all 0? Anything wrong here?

2) comment out the "return" if the USB2PHY_RXCALIB_DONE unsuccessful so the code can continue to run, let is print more values for debug purpose as followed:

musb-hdrc: version 6.0, host, debug=5
musb-hdrc musb-hdrc.0: dma type: dma-cppi41
MUSB controller-0 revision 4ea20800
default rxcalib regval 00000000
usb2phy_config 1136: usb2phy rxcalibration failed
usb2phy_config 1144: musb(0) sign 0 current RXcalib 0
initial value of DAC3 (0) DAC2(0) DAC1(0)
usb2phy: computed values rxcalib(15)DACs(0 2 2)
usb2phy: override computed values rxcalib(15)DACs(0 2 2)
musb(0) sign(1) rxcalib(15) dac3(2) dac2(2) written val 6f204510
usb2phy_config: musb(0) rxcalib done, rxcalib read value 6f204100
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 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

Could you help advise if anything is wrong from these info?

Thanks,

Shunnian

Shunnian Zhai said:

1) print the default rxcalib regval before error printing as followed:

default rxcalib regval 00000000

Why the value is all 0? Anything wrong here?

It seems to be wrong. On my side I have "default rxcalib regval 004f1a6e".

Shunnian Zhai said:

Could you help advise if anything is wrong from these info?

This seems to me to be HW malfunction. You might damaged the USB ports of your custom board. The USB PHY is integrated within the DM814x device, the init/config procedure should be handles correctly by the MUSB driver with no need for user interaction. I do not think you will be able to fix your board changing the USB driver (drivers/usb/musb/ti81xx.c). There are no custom board specific configuration required in the usb driver except for enabling the usb support in custom board specifc file (i.e. arch/arm/mach-omap2/board-ti8148evm.c).

Can you double check that when using EZSDK5.05.00.02/PSP04.04.00.01 MUSB driver, the USB PHY will be init/config properly?

Regards,
Pavel

Hi, Pavel,

Thanks for your confirmation.

Regards,
Shunnian