static int __init ehci_atmel_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
const struct hc_driver *driver = &ehci_atmel_hc_driver;
struct resource *res;
int irq;
int retval;
if (usb_disabled())
return -ENODEV;
pr_debug("Initializing Atmel-SoC USB Host Controller\n");
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
dev_err(&pdev->dev,
"Found HC with no IRQ. Check %s setup!\n",
dev_name(&pdev->dev));
retval = -ENODEV;
goto fail_create_hcd;
}
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
retval = -ENOMEM;
goto fail_create_hcd;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev,
"Found HC with no register addr. Check %s setup!\n",
dev_name(&pdev->dev));
retval = -ENODEV;
goto fail_request_resource;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
driver->description)) {
dev_dbg(&pdev->dev, "controller already in use\n");
retval = -EBUSY;
goto fail_request_resource;
}
hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
if (hcd->regs == NULL) {
dev_dbg(&pdev->dev, "error mapping memory\n");
retval = -EFAULT;
goto fail_ioremap;
}
iclk = clk_get(&pdev->dev, "ehci_clk");
if (IS_ERR(iclk)) {
dev_err(&pdev->dev, "Error getting interface clock\n");
retval = -ENOENT;
goto fail_get_iclk;
}
fclk = clk_get(&pdev->dev, "uhpck");
if (IS_ERR(fclk)) {
dev_err(&pdev->dev, "Error getting function clock\n");
retval = -ENOENT;
goto fail_get_fclk;
}
atmel_start_ehci(pdev);
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (retval)
goto fail_add_hcd;
return retval;
fail_add_hcd:
atmel_stop_ehci(pdev);
clk_put(fclk);
fail_get_fclk:
clk_put(iclk);
fail_get_iclk:
iounmap(hcd->regs);
fail_ioremap:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
fail_request_resource:
usb_put_hcd(hcd);
fail_create_hcd:
dev_err(&pdev->dev, "init %s fail, %d\n",
dev_name(&pdev->dev), retval);
return retval;
}
static int ehci_atmel_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
const struct hc_driver *driver = &ehci_atmel_hc_driver;
struct resource *res;
struct ehci_hcd *ehci;
int irq;
int retval;
if (usb_disabled())
return -ENODEV;
pr_debug("Initializing Atmel-SoC USB Host Controller\n");
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
dev_err(&pdev->dev,
"Found HC with no IRQ. Check %s setup!\n",
dev_name(&pdev->dev));
retval = -ENODEV;
goto fail_create_hcd;
}
/* Right now device-tree probed devices don't get dma_mask set.
* Since shared usb code relies on it, set it here for now.
* Once we have dma capability bindings this can go away.
*/
retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (retval)
goto fail_create_hcd;
hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
retval = -ENOMEM;
goto fail_create_hcd;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hcd->regs)) {
retval = PTR_ERR(hcd->regs);
goto fail_request_resource;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
iclk = devm_clk_get(&pdev->dev, "ehci_clk");
if (IS_ERR(iclk)) {
dev_err(&pdev->dev, "Error getting interface clock\n");
retval = -ENOENT;
goto fail_request_resource;
}
fclk = devm_clk_get(&pdev->dev, "uhpck");
if (IS_ERR(fclk)) {
dev_err(&pdev->dev, "Error getting function clock\n");
retval = -ENOENT;
goto fail_request_resource;
}
if (IS_ENABLED(CONFIG_COMMON_CLK)) {
uclk = devm_clk_get(&pdev->dev, "usb_clk");
if (IS_ERR(uclk)) {
dev_err(&pdev->dev, "failed to get uclk\n");
retval = PTR_ERR(uclk);
goto fail_request_resource;
}
}
ehci = hcd_to_ehci(hcd);
/* registers start at offset 0x0 */
ehci->caps = hcd->regs;
atmel_start_ehci(pdev);
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (retval)
goto fail_add_hcd;
device_wakeup_enable(hcd->self.controller);
return retval;
fail_add_hcd:
atmel_stop_ehci(pdev);
fail_request_resource:
usb_put_hcd(hcd);
fail_create_hcd:
dev_err(&pdev->dev, "init %s fail, %d\n",
dev_name(&pdev->dev), retval);
return retval;
}