Hi,
I'm trying to use utilize ISP1761 USB 2.0 controller on
a custom platform based on Intel IXP420 CPU (big endian).
I'm using vanilla 2.6.29-rc2, with patches to add generic
platform device support to ISP160 driver. The ISP1761BE
is connected 16-bit, the IRQ line is level, active low.
The driver passes scratch register test, but fails in isp1760_run(),
when calling
handshake(priv, hcd->regs + HC_USBCMD, CMD_RUN, CMD_RUN,
250 * 1000);
Below is the relevant output from the driver:
nxp-isp1760 nxp-isp1760: NXP ISP1760 USB Host Controller
nxp-isp1760 nxp-isp1760: new USB bus registered, assigned bus number 1
nxp-isp1760 nxp-isp1760: bus width: 16, oc: digital
nxp-isp1760 nxp-isp1760: irq 25, io mem 0x56000000
nxp-isp1760 nxp-isp1760: startup error -110
nxp-isp1760 nxp-isp1760: USB bus 1 deregistered
nxp-isp1760: probe of nxp-isp1760 failed with error -110
This IXP420 processor is unable to access 16-bit device using native
readl() and writel(), so I had to implement my own versions and replace
all uses of readl(), writel(), __raw_readl() and __raw_writel() by custom
ones, which look like this:
static inline unsigned long ixp4xx_readl(unsigned long addr)
{
unsigned long val;
val = *(unsigned long *)addr;
return (((val & 0xffff) << 16) | ((val & 0xffff0000) >> 16));
}
static inline void ixp4xx_writel(unsigned long data, unsigned long addr)
{
*(unsigned short *)(addr) = (data) & 0xffff;
*(unsigned short *)(addr + 2) = (data >> 16) & 0xffff;
}
Any help is solving this problem is much appreciated.
Thanks a lot in advance.
Felix Radensky
Embedded Solutions Ltd.
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
