[PATCH 2/4] usb: chipidea: usbmisc_imx: add .set_wakeup interface

[Peter Chen]

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.c...@freescale.com>
---
 drivers/usb/chipidea/ci_hdrc_imx.h |  1 +
 drivers/usb/chipidea/usbmisc_imx.c | 52 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/drivers/usb/chipidea/ci_hdrc_imx.h 
b/drivers/usb/chipidea/ci_hdrc_imx.h
index 4ed828f..635717e 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 eb77e32..90b7d7f 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",
-- 
1.9.1

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