usb: chipidea: usbmisc: add mx53 support

This adds mx53 as the next user of the usbmisc driver and makes it
possible to disable the overcurrent-detection of the internal phy.

Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
[Alex: fixed another set of line-too-long and void pointer cast]
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 08b046f9491b..746013d7d391 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -19,6 +19,13 @@
 
 #define USB_DEV_MAX 4
 
+#define MX53_USB_OTG_PHY_CTRL_0_OFFSET  0x08
+#define MX53_USB_UH2_CTRL_OFFSET        0x14
+#define MX53_USB_UH3_CTRL_OFFSET        0x18
+#define MX53_BM_OVER_CUR_DIS_H1         BIT(5)
+#define MX53_BM_OVER_CUR_DIS_OTG        BIT(8)
+#define MX53_BM_OVER_CUR_DIS_UHx        BIT(30)
+
 #define MX6_BM_OVER_CUR_DIS             BIT(7)
 
 struct imx_usbmisc {
@@ -52,6 +59,45 @@ static struct usbmisc_usb_device *get_usbdev(struct device *dev)
         return &usbmisc->usbdev[i];
 }
 
+static int usbmisc_imx53_init(struct device *dev)
+{
+        struct usbmisc_usb_device *usbdev;
+        void __iomem *reg = NULL;
+        unsigned long flags;
+        u32 val = 0;
+
+        usbdev = get_usbdev(dev);
+        if (IS_ERR(usbdev))
+                return PTR_ERR(usbdev);
+
+        if (usbdev->disable_oc) {
+                spin_lock_irqsave(&usbmisc->lock, flags);
+                switch (usbdev->index) {
+                case 0:
+                        reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
+                        val = readl(reg) | MX53_BM_OVER_CUR_DIS_OTG;
+                        break;
+                case 1:
+                        reg = usbmisc->base + MX53_USB_OTG_PHY_CTRL_0_OFFSET;
+                        val = readl(reg) | MX53_BM_OVER_CUR_DIS_H1;
+                        break;
+                case 2:
+                        reg = usbmisc->base + MX53_USB_UH2_CTRL_OFFSET;
+                        val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
+                        break;
+                case 3:
+                        reg = usbmisc->base + MX53_USB_UH3_CTRL_OFFSET;
+                        val = readl(reg) | MX53_BM_OVER_CUR_DIS_UHx;
+                        break;
+                }
+                if (reg && val)
+                        writel(val, reg);
+                spin_unlock_irqrestore(&usbmisc->lock, flags);
+        }
+
+        return 0;
+}
+
 static int usbmisc_imx6q_init(struct device *dev)
 {
 
@@ -74,12 +120,20 @@ static int usbmisc_imx6q_init(struct device *dev)
         return 0;
 }
 
+static const struct usbmisc_ops imx53_usbmisc_ops = {
+        .init = usbmisc_imx53_init,
+};
+
 static const struct usbmisc_ops imx6q_usbmisc_ops = {
         .init = usbmisc_imx6q_init,
 };
 
 static const struct of_device_id usbmisc_imx_dt_ids[] = {
         {
+                .compatible = "fsl,imx53-usbmisc",
+                .data = &imx53_usbmisc_ops,
+        },
+        {
                 .compatible = "fsl,imx6q-usbmisc",
                 .data = &imx6q_usbmisc_ops,
         },