USB device!

hi hippo

So far, i don't solve this problem for usb isp1362.

i find two problematic places in isp1362-hcd.c form booting messages to konw , it is "isp1362_hc_reset" and "isp1362_probe". such as following:

Booting messages for usb isp1362

.

driver isp1362-hcd, 2005-04-04

isp1362-hcd isp1362-hcd: ISP1362 Host Controller

isp1362_hc_reset:

Clock not ready after 20ms

isp1362-hcd isp1362-hcd: can't reset

init error, -19

.

.

static int isp1362_hc_reset(struct usb_hcd *hcd)

{

int ret = 0;

struct isp1362_hcd *isp1362_hcd = hcd_to_isp1362_hcd(hcd);

unsigned long t;

unsigned long timeout = 20;

unsigned long flags;

int clkrdy = 0;

INFO("%s:\n", __FUNCTION__);

// dump_regs(s, isp1362_hcd);

if (isp1362_hcd->board && isp1362_hcd->board->reset) {

isp1362_hcd->board->reset(hcd->self.controller, 1);

msleep(20);

if (isp1362_hcd->board->clock) {

isp1362_hcd->board->clock(hcd->self.controller, 1);

}

isp1362_hcd->board->reset(hcd->self.controller, 0);

} else {

isp1362_sw_reset(isp1362_hcd);

}

// chip has been reset. First we need to see a clock

t = jiffies + msecs_to_jiffies(timeout);

while (!clkrdy && time_before_eq(jiffies, t)) {

spin_lock_irqsave(&isp1362_hcd->lock, flags);

clkrdy = isp1362_read_reg16(isp1362_hcd, HCuPINT) & HCuPINT_CLKRDY;

spin_unlock_irqrestore(&isp1362_hcd->lock, flags);

if (!clkrdy) {

msleep(4);

}

}

spin_lock_irqsave(&isp1362_hcd->lock, flags);

isp1362_write_reg16(isp1362_hcd, HCuPINT, HCuPINT_CLKRDY);

spin_unlock_irqrestore(&isp1362_hcd->lock, flags);

if (!clkrdy) {

ERR("Clock not ready after %lums\n", timeout);

ret = -ENODEV;

}

return ret;

}

////////////////////////////////////////////////////////////////////////////////////////////

static int __init isp1362_probe(struct platform_device *pdev)

{

struct usb_hcd *hcd;

struct isp1362_hcd *isp1362_hcd;

struct resource *addr, *data;

void __iomem *addr_reg;

void __iomem *data_reg;

int irq;

int retval = 0;

/* basic sanity checks first. board-specific init logic should

* have initialized this the three resources and probably board

* specific platform_data. we don't probe for IRQs, and do only

* minimal sanity checking.

*/

if (pdev->num_resources < 3) {

retval = -ENODEV;

goto err1;

}

data = platform_get_resource(pdev, IORESOURCE_MEM, 0);

addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);

irq = platform_get_irq(pdev, 0);

if (!addr || !data || irq < 0) {

retval = -ENODEV;

goto err1;

}

# ifdef CONFIG_USB_HCD_DMA

if (pdev->dev.dma_mask) {

struct resource *dma_res = platform_get_resource(pdev, IORESOURCE_MEM, 2);

if (!dma_res) {

retval = -ENODEV;

goto err1;

}

isp1362_hcd->data_dma = dma_res->start;

isp1362_hcd->max_dma_size = resource_len(dma_res);

}# else

if (pdev->dev.dma_mask) {

DBG(1, "won&#39;t do DMA");

retval = -ENODEV;

goto err1;

}# endif

if (!request_mem_region(addr->start, resource_len(addr), hcd_name)) {

retval = -EBUSY;

goto err1;

}

.

.

.

err1:

printk("init error, %d\n", retval);

return retval;

.

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i am not good in usb driver. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif

Can you tell more detail how to debug it ?

Thx in advance !

jay