OHCI on Samsung S3C6410 SoC, how to get it work?

Hi list,

I'm trying to get the OHCI unit work on my S3C6410 SoC based Mini6410 but
without luck yet.

The driver in my Linux-3.7.4 always reports:

[...]
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
ohci_hcd: block sizes: ed 64 td 64
s3c2410-ohci s3c2410-ohci: s3c2410_start_hc:
s3c2410-ohci s3c2410-ohci: S3C24XX OHCI
s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1
s3c2410-ohci s3c2410-ohci: irq 79, io mem 0x74300000
s3c2410-ohci s3c2410-ohci: created debug files
s3c2410-ohci s3c2410-ohci: fminterval delta -11999
s3c2410-ohci s3c2410-ohci: enabling initreset quirk
s3c2410-ohci s3c2410-ohci: init err (00000000 0000)
s3c2410-ohci s3c2410-ohci: can't start s3c24xx
s3c2410-ohci s3c2410-ohci: OHCI controller state
s3c2410-ohci s3c2410-ohci: OHCI 0.0, NO legacy support registers, rh state halted
s3c2410-ohci s3c2410-ohci: control 0x000 HCFS=reset CBSR=0
s3c2410-ohci s3c2410-ohci: cmdstatus 0x00000 SOC=0
s3c2410-ohci s3c2410-ohci: intrstatus 0x00000000
s3c2410-ohci s3c2410-ohci: intrenable 0x00000000
s3c2410-ohci s3c2410-ohci: hcca frame #0000
s3c2410-ohci s3c2410-ohci: roothub.a 00000000 POTPGT=0 NDP=0(0)
s3c2410-ohci s3c2410-ohci: roothub.b 00000000 PPCM=0000 DR=0000
s3c2410-ohci s3c2410-ohci: roothub.status 00000000
s3c2410-ohci s3c2410-ohci: startup error -75
s3c2410-ohci s3c2410-ohci: USB bus 1 deregistered
s3c2410-ohci s3c2410-ohci: s3c2410_stop_hc:
s3c2410-ohci: probe of s3c2410-ohci failed with error -75
[...]

From the error messages I guess the unit does not receive a clock. But as far

I can follow the code, the driver enables the correct clocks. From the data
sheet I know the OHCI unit shares the clock with the OTG unit. Has someone a
working OHCI on an S3C6410 SoC based system and can give me some hints how to
get it work on my Mini6410?

Regards,
Juergen

-- 
Pengutronix e.K.                              | Juergen Beisert             |
Linux Solutions for Science and Industry      | http://www.pengutronix.de/  |