On Thu, May 05, 2005 at 09:42:41AM -0700, Pete Popov wrote:
> It sounds like this is a custom Au1100 based board? What boot code are
> you running? I'm guessing the SOC isn't setup correctly or you have a
> HW problem.
Yes, you was right, I missing to setup USB clock... I just added this
code to the board init function (board_setup() function) and now USB
works:
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_AU1X00_USB_DEVICE)
/* zero and disable FREQ2 */
sys_freqctrl = au_readl(SYS_FREQCTRL0);
sys_freqctrl &= ~0xFFF00000;
au_writel(sys_freqctrl, SYS_FREQCTRL0);
/* zero and disable USBH/USBD/IrDA clock */
sys_clksrc = au_readl(SYS_CLKSRC);
sys_clksrc &= ~0x0000001F;
au_writel(sys_clksrc, SYS_CLKSRC);
sys_freqctrl = au_readl(SYS_FREQCTRL0);
sys_freqctrl &= ~0xFFF00000;
sys_clksrc = au_readl(SYS_CLKSRC);
sys_clksrc &= ~0x0000001F;
/* FREQ2 = aux/2 = 48 MHz */
sys_freqctrl |= ((0<<22) | (1<<21) | (1<<20));
au_writel(sys_freqctrl, SYS_FREQCTRL0);
/* Route 48MHz FREQ2 into USBH/USBD/IrDA */
sys_clksrc |= ((4<<2) | (0<<1) | 0 );
au_writel(sys_clksrc, SYS_CLKSRC);
/* setup the static bus controller */
au_writel(0x00000002, MEM_STCFG3); /* type = PCMCIA */
au_writel(0x280E3D07, MEM_STTIME3); /* 250ns cycle time */
au_writel(0x10000000, MEM_STADDR3); /* any PCMCIA select */
/* Get USB Functionality pin state (device vs host drive pins) */
pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x8000);
#ifndef CONFIG_AU1X00_USB_DEVICE
/* 2nd USB port is USB host */
pin_func |= 0x8000;
#endif
au_writel(pin_func, SYS_PINFUNC);
#endif /* defined (CONFIG_USB_OHCI_HCD) || defined (CONFIG_AU1X00_USB_DEVICE) */
But don't you think is better to put this code into USB driver (file
ohci-au1xxx.c) during probing stage? In this manner each platforms may
don't worry about clock initialization...
Ciao,
Rodolfo
--
GNU/Linux Solutions e-mail: giometti@xxxxxxxx
Linux Device Driver giometti@xxxxxxxxxxxx
Embedded Systems home page: giometti.enneenne.com
UNIX programming phone: +39 349 2432127
Attachment:
signature.asc
Description: Digital signature
