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 <gautam.vivek@samsung.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 63 insertions, 21 deletions

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 <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/usb-exynos.h>
+#include <linux/usb/phy.h>
 #include <linux/usb/samsung_usb_phy.h>
 #include <plat/usb-phy.h>
 
@@ -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);