On Wed, 11 Apr 2012, Steven J. Hill wrote:
> From: "Steven J. Hill" <sjhill@xxxxxxxx>
>
> Add EHCI driver for MIPS SEAD-3 development platform.
>
> Signed-off-by: Chris Dearman <chris@xxxxxxxx>
> Signed-off-by: Steven J. Hill <sjhill@xxxxxxxx>
Even better than before. But...
> +const struct hc_driver ehci_sead3_hc_driver = {
> + .description = hcd_name,
> + .product_desc = "SEAD-3 EHCI",
> + .hcd_priv_size = sizeof(struct ehci_hcd),
> +
> + /*
> + * generic hardware linkage
> + */
> + .irq = ehci_irq,
> + .flags = HCD_MEMORY | HCD_USB2,
> +
> + /*
> + * basic lifecycle operations
> + *
> + */
> + .reset = ehci_setup,
You no longer care about the ehci->need_io_watchdog setting?
> +static int ehci_hcd_sead3_drv_probe(struct platform_device *pdev)
> +{
> + struct usb_hcd *hcd;
> + struct ehci_hcd *ehci;
> + struct resource *res;
> + int ret;
> +
> + if (usb_disabled())
> + return -ENODEV;
> +
> + if (pdev->resource[1].flags != IORESOURCE_IRQ) {
> + pr_debug("resource[1] is not IORESOURCE_IRQ");
> + return -ENOMEM;
> + }
> + hcd = usb_create_hcd(&ehci_sead3_hc_driver, &pdev->dev, "SEAD-3");
> + if (!hcd)
> + return -ENOMEM;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + hcd->rsrc_start = res->start;
> + hcd->rsrc_len = resource_size(res);
> +
> + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
> + pr_debug("request_mem_region failed");
> + ret = -EBUSY;
> + goto err1;
> + }
> +
> + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
> + if (!hcd->regs) {
> + pr_debug("ioremap failed");
> + ret = -ENOMEM;
> + goto err2;
> + }
> +
> + ehci = hcd_to_ehci(hcd);
> + ehci->caps = hcd->regs + 0x100;
> + ehci->regs = hcd->regs + 0x100 +
> + HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
> + /* cache this readonly data; minimize chip reads */
> + ehci->hcs_params = readl(&ehci->caps->hcs_params);
The last four lines above are duplicates of code that is already
present in ehci_setup.
Alan Stern
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