usb: chipidea: usbmisc_imx: add .set_wakeup interface

This API is used to enable/disable usb wakeup, only imx6 series are
added, since I don't have other imx hardware on hand. Other imx users
can add their API according to reference manual after testing.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 53 insertions, 0 deletions

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.h b/drivers/usb/chipidea/ci_hdrc_imx.h
index 4ed828f75a1e..635717e9354a 100644
--- a/drivers/usb/chipidea/ci_hdrc_imx.h
+++ b/drivers/usb/chipidea/ci_hdrc_imx.h
@@ -22,5 +22,6 @@ struct imx_usbmisc_data {
 
 int imx_usbmisc_init(struct imx_usbmisc_data *);
 int imx_usbmisc_init_post(struct imx_usbmisc_data *);
+int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *, bool);
 
 #endif /* __DRIVER_USB_CHIPIDEA_CI_HDRC_IMX_H */
diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index eb77e3285c8a..90b7d7f3c81b 100644
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -55,6 +55,10 @@
 #define MX53_USB_PLL_DIV_24_MHZ         0x01
 
 #define MX6_BM_OVER_CUR_DIS             BIT(7)
+#define MX6_BM_WAKEUP_ENABLE            BIT(10)
+#define MX6_BM_ID_WAKEUP                BIT(16)
+#define MX6_BM_VBUS_WAKEUP              BIT(17)
+#define MX6_BM_WAKEUP_INTR              BIT(31)
 
 #define VF610_OVER_CUR_DIS              BIT(7)
 
@@ -63,6 +67,8 @@ struct usbmisc_ops {
         int (*init)(struct imx_usbmisc_data *data);
         /* It's called once after adding a usb device */
         int (*post)(struct imx_usbmisc_data *data);
+        /* It's called when we need to enable/disable usb wakeup */
+        int (*set_wakeup)(struct imx_usbmisc_data *data, bool enabled);
 };
 
 struct imx_usbmisc {
@@ -202,6 +208,35 @@ static int usbmisc_imx53_init(struct imx_usbmisc_data *data)
         return 0;
 }
 
+static int usbmisc_imx6q_set_wakeup
+        (struct imx_usbmisc_data *data, bool enabled)
+{
+        struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
+        unsigned long flags;
+        u32 val;
+        u32 wakeup_setting = (MX6_BM_WAKEUP_ENABLE |
+                MX6_BM_VBUS_WAKEUP | MX6_BM_ID_WAKEUP);
+        int ret = 0;
+
+        if (data->index > 3)
+                return -EINVAL;
+
+        spin_lock_irqsave(&usbmisc->lock, flags);
+        val = readl(usbmisc->base + data->index * 4);
+        if (enabled) {
+                val |= wakeup_setting;
+                writel(val, usbmisc->base + data->index * 4);
+        } else {
+                if (val & MX6_BM_WAKEUP_INTR)
+                        pr_debug("wakeup int at ci_hdrc.%d\n", data->index);
+                val &= ~wakeup_setting;
+                writel(val, usbmisc->base + data->index * 4);
+        }
+        spin_unlock_irqrestore(&usbmisc->lock, flags);
+
+        return ret;
+}
+
 static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
 {
         struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
@@ -219,6 +254,8 @@ static int usbmisc_imx6q_init(struct imx_usbmisc_data *data)
                 spin_unlock_irqrestore(&usbmisc->lock, flags);
         }
 
+        usbmisc_imx6q_set_wakeup(data, false);
+
         return 0;
 }
 
@@ -256,6 +293,7 @@ static const struct usbmisc_ops imx53_usbmisc_ops = {
 };
 
 static const struct usbmisc_ops imx6q_usbmisc_ops = {
+        .set_wakeup = usbmisc_imx6q_set_wakeup,
         .init = usbmisc_imx6q_init,
 };
 
@@ -291,6 +329,20 @@ int imx_usbmisc_init_post(struct imx_usbmisc_data *data)
 }
 EXPORT_SYMBOL_GPL(imx_usbmisc_init_post);
 
+int imx_usbmisc_set_wakeup(struct imx_usbmisc_data *data, bool enabled)
+{
+        struct imx_usbmisc *usbmisc;
+
+        if (!data)
+                return 0;
+
+        usbmisc = dev_get_drvdata(data->dev);
+        if (!usbmisc->ops->set_wakeup)
+                return 0;
+        return usbmisc->ops->set_wakeup(data, enabled);
+}
+EXPORT_SYMBOL_GPL(imx_usbmisc_set_wakeup);
+
 static const struct of_device_id usbmisc_imx_dt_ids[] = {
         {
                 .compatible = "fsl,imx25-usbmisc",