From: Vivek Gautam Date: Tue, 22 Jan 2013 13:00:43 +0000 (+0530) Subject: USB: ohci-exynos: Add phy driver support X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ed993bf19b98fdb0d364913174b5001fc3ac199b;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git USB: ohci-exynos: Add phy driver support Adding the phy-driver to ohci-exynos. Keeping the platform data for continuing the smooth operation for boards which still uses it Signed-off-by: Vivek Gautam Acked-by: Jingoo Han Acked-by: Alan Stern Acked-by: Kukjin Kim Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c index 804fb62a888c..1b3840980177 100644 --- a/drivers/usb/host/ohci-exynos.c +++ b/drivers/usb/host/ohci-exynos.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include @@ -22,8 +23,31 @@ struct exynos_ohci_hcd { struct device *dev; struct usb_hcd *hcd; struct clk *clk; + struct usb_phy *phy; + struct usb_otg *otg; + struct exynos4_ohci_platdata *pdata; }; +static void exynos_ohci_phy_enable(struct exynos_ohci_hcd *exynos_ohci) +{ + struct platform_device *pdev = to_platform_device(exynos_ohci->dev); + + if (exynos_ohci->phy) + usb_phy_init(exynos_ohci->phy); + else if (exynos_ohci->pdata->phy_init) + exynos_ohci->pdata->phy_init(pdev, USB_PHY_TYPE_HOST); +} + +static void exynos_ohci_phy_disable(struct exynos_ohci_hcd *exynos_ohci) +{ + struct platform_device *pdev = to_platform_device(exynos_ohci->dev); + + if (exynos_ohci->phy) + usb_phy_shutdown(exynos_ohci->phy); + else if (exynos_ohci->pdata->phy_exit) + exynos_ohci->pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); +} + static int ohci_exynos_reset(struct usb_hcd *hcd) { return ohci_init(hcd_to_ohci(hcd)); @@ -79,20 +103,15 @@ static u64 ohci_exynos_dma_mask = DMA_BIT_MASK(32); static int exynos_ohci_probe(struct platform_device *pdev) { - struct exynos4_ohci_platdata *pdata; + struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data; struct exynos_ohci_hcd *exynos_ohci; struct usb_hcd *hcd; struct ohci_hcd *ohci; struct resource *res; + struct usb_phy *phy; int irq; int err; - pdata = pdev->dev.platform_data; - if (!pdata) { - dev_err(&pdev->dev, "No platform data defined\n"); - return -EINVAL; - } - /* * Right now device-tree probed devices don't get dma_mask set. * Since shared usb code relies on it, set it here for now. @@ -108,6 +127,20 @@ static int exynos_ohci_probe(struct platform_device *pdev) if (!exynos_ohci) return -ENOMEM; + phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); + if (IS_ERR_OR_NULL(phy)) { + /* Fallback to pdata */ + if (!pdata) { + dev_warn(&pdev->dev, "no platform data or transceiver defined\n"); + return -EPROBE_DEFER; + } else { + exynos_ohci->pdata = pdata; + } + } else { + exynos_ohci->phy = phy; + exynos_ohci->otg = phy->otg; + } + exynos_ohci->dev = &pdev->dev; hcd = usb_create_hcd(&exynos_ohci_hc_driver, &pdev->dev, @@ -153,8 +186,11 @@ static int exynos_ohci_probe(struct platform_device *pdev) goto fail_io; } - if (pdata->phy_init) - pdata->phy_init(pdev, USB_PHY_TYPE_HOST); + if (exynos_ohci->otg) + exynos_ohci->otg->set_host(exynos_ohci->otg, + &exynos_ohci->hcd->self); + + exynos_ohci_phy_enable(exynos_ohci); ohci = hcd_to_ohci(hcd); ohci_hcd_init(ohci); @@ -162,13 +198,15 @@ static int exynos_ohci_probe(struct platform_device *pdev) err = usb_add_hcd(hcd, irq, IRQF_SHARED); if (err) { dev_err(&pdev->dev, "Failed to add USB HCD\n"); - goto fail_io; + goto fail_add_hcd; } platform_set_drvdata(pdev, exynos_ohci); return 0; +fail_add_hcd: + exynos_ohci_phy_disable(exynos_ohci); fail_io: clk_disable_unprepare(exynos_ohci->clk); fail_clk: @@ -178,14 +216,16 @@ fail_clk: static int exynos_ohci_remove(struct platform_device *pdev) { - struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data; struct exynos_ohci_hcd *exynos_ohci = platform_get_drvdata(pdev); struct usb_hcd *hcd = exynos_ohci->hcd; usb_remove_hcd(hcd); - if (pdata && pdata->phy_exit) - pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); + if (exynos_ohci->otg) + exynos_ohci->otg->set_host(exynos_ohci->otg, + &exynos_ohci->hcd->self); + + exynos_ohci_phy_disable(exynos_ohci); clk_disable_unprepare(exynos_ohci->clk); @@ -209,8 +249,6 @@ static int exynos_ohci_suspend(struct device *dev) struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev); struct usb_hcd *hcd = exynos_ohci->hcd; struct ohci_hcd *ohci = hcd_to_ohci(hcd); - struct platform_device *pdev = to_platform_device(dev); - struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data; unsigned long flags; int rc = 0; @@ -229,8 +267,11 @@ static int exynos_ohci_suspend(struct device *dev) clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - if (pdata && pdata->phy_exit) - pdata->phy_exit(pdev, USB_PHY_TYPE_HOST); + if (exynos_ohci->otg) + exynos_ohci->otg->set_host(exynos_ohci->otg, + &exynos_ohci->hcd->self); + + exynos_ohci_phy_disable(exynos_ohci); clk_disable_unprepare(exynos_ohci->clk); @@ -244,13 +285,14 @@ static int exynos_ohci_resume(struct device *dev) { struct exynos_ohci_hcd *exynos_ohci = dev_get_drvdata(dev); struct usb_hcd *hcd = exynos_ohci->hcd; - struct platform_device *pdev = to_platform_device(dev); - struct exynos4_ohci_platdata *pdata = pdev->dev.platform_data; clk_prepare_enable(exynos_ohci->clk); - if (pdata && pdata->phy_init) - pdata->phy_init(pdev, USB_PHY_TYPE_HOST); + if (exynos_ohci->otg) + exynos_ohci->otg->set_host(exynos_ohci->otg, + &exynos_ohci->hcd->self); + + exynos_ohci_phy_enable(exynos_ohci); ohci_resume(hcd, false);