Ejemplo n.º 1
0
static int ohci_hcd_nxp_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd = 0;
	const struct hc_driver *driver = &ohci_nxp_hc_driver;
	struct resource *res;
	int ret = 0, irq;
	struct device_node *isp1301_node;

	if (pdev->dev.of_node) {
		isp1301_node = of_parse_phandle(pdev->dev.of_node,
						"transceiver", 0);
	} else {
		isp1301_node = NULL;
	}

	isp1301_i2c_client = isp1301_get_client(isp1301_node);
	if (!isp1301_i2c_client) {
		return -EPROBE_DEFER;
	}

	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	if (ret)
		goto fail_disable;

	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
	if (usb_disabled()) {
		dev_err(&pdev->dev, "USB is disabled\n");
		ret = -ENODEV;
		goto fail_disable;
	}

	/* Enable AHB slave USB clock, needed for further USB clock control */
	__raw_writel(USB_SLAVE_HCLK_EN | PAD_CONTROL_LAST_DRIVEN, USB_CTRL);

	/* Enable USB PLL */
	usb_pll_clk = devm_clk_get(&pdev->dev, "ck_pll5");
	if (IS_ERR(usb_pll_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB PLL\n");
		ret = PTR_ERR(usb_pll_clk);
		goto fail_disable;
	}

	ret = clk_enable(usb_pll_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB PLL\n");
		goto fail_disable;
	}

	ret = clk_set_rate(usb_pll_clk, 48000);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to set USB clock rate\n");
		goto fail_rate;
	}

	/* Enable USB device clock */
	usb_dev_clk = devm_clk_get(&pdev->dev, "ck_usbd");
	if (IS_ERR(usb_dev_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
		ret = PTR_ERR(usb_dev_clk);
		goto fail_rate;
	}

	ret = clk_enable(usb_dev_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
		goto fail_rate;
	}

	/* Enable USB otg clocks */
	usb_otg_clk = devm_clk_get(&pdev->dev, "ck_usb_otg");
	if (IS_ERR(usb_otg_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n");
		ret = PTR_ERR(usb_otg_clk);
		goto fail_otg;
	}

	__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);

	ret = clk_enable(usb_otg_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB DEV Clock\n");
		goto fail_otg;
	}

	isp1301_configure();

	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
		dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
		ret = -ENOMEM;
		goto fail_hcd;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(hcd->regs)) {
		ret = PTR_ERR(hcd->regs);
		goto fail_resource;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = -ENXIO;
		goto fail_resource;
	}

	ohci_nxp_start_hc();
	platform_set_drvdata(pdev, hcd);

	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
	ret = usb_add_hcd(hcd, irq, 0);
	if (ret == 0) {
		device_wakeup_enable(hcd->self.controller);
		return ret;
	}

	ohci_nxp_stop_hc();
fail_resource:
	usb_put_hcd(hcd);
fail_hcd:
	clk_disable(usb_otg_clk);
fail_otg:
	clk_disable(usb_dev_clk);
fail_rate:
	clk_disable(usb_pll_clk);
fail_disable:
	isp1301_i2c_client = NULL;
	return ret;
}
Ejemplo n.º 2
0
static int __devinit usb_hcd_nxp_probe(struct platform_device *pdev)
{
	struct usb_hcd *hcd = 0;
	struct ohci_hcd *ohci;
	const struct hc_driver *driver = &ohci_nxp_hc_driver;
	struct resource *res;
	int ret = 0, irq;
	struct device_node *isp1301_node;

	if (pdev->dev.of_node) {
		isp1301_node = of_parse_phandle(pdev->dev.of_node,
						"transceiver", 0);
	} else {
		isp1301_node = NULL;
	}

	isp1301_i2c_client = isp1301_get_client(isp1301_node);
	if (!isp1301_i2c_client) {
		ret = -EPROBE_DEFER;
		goto out;
	}

	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;

	dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
	if (usb_disabled()) {
		dev_err(&pdev->dev, "USB is disabled\n");
		ret = -ENODEV;
		goto out;
	}

	/* Enable AHB slave USB clock, needed for further USB clock control */
	__raw_writel(USB_SLAVE_HCLK_EN | PAD_CONTROL_LAST_DRIVEN, USB_CTRL);

	isp1301_configure();

	/* Enable USB PLL */
	usb_clk = clk_get(&pdev->dev, "ck_pll5");
	if (IS_ERR(usb_clk)) {
		dev_err(&pdev->dev, "failed to acquire USB PLL\n");
		ret = PTR_ERR(usb_clk);
		goto out1;
	}

	ret = clk_enable(usb_clk);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to start USB PLL\n");
		goto out2;
	}

	ret = clk_set_rate(usb_clk, 48000);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to set USB clock rate\n");
		goto out3;
	}

	__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);

	/* Set to enable all needed USB clocks */
	__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);

	while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
	       USB_CLOCK_MASK) ;

	hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
	if (!hcd) {
		dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
		ret = -ENOMEM;
		goto out3;
	}

	/* Set all USB bits in the Start Enable register */
	nxp_set_usb_bits();

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
		dev_err(&pdev->dev, "Failed to get MEM resource\n");
		ret =  -ENOMEM;
		goto out4;
	}

	hcd->regs = devm_request_and_ioremap(&pdev->dev, res);
	if (!hcd->regs) {
		dev_err(&pdev->dev, "Failed to devm_request_and_ioremap\n");
		ret =  -ENOMEM;
		goto out4;
	}
	hcd->rsrc_start = res->start;
	hcd->rsrc_len = resource_size(res);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = -ENXIO;
		goto out4;
	}

	nxp_start_hc();
	platform_set_drvdata(pdev, hcd);
	ohci = hcd_to_ohci(hcd);
	ohci_hcd_init(ohci);

	dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
	ret = usb_add_hcd(hcd, irq, 0);
	if (ret == 0)
		return ret;

	nxp_stop_hc();
out4:
	nxp_unset_usb_bits();
	usb_put_hcd(hcd);
out3:
	clk_disable(usb_clk);
out2:
	clk_put(usb_clk);
out1:
	isp1301_i2c_client = NULL;
out:
	return ret;
}