usb: mtu3: support suspend/resume for dual-role mode
Support suspend/resume for dual-role mode including the single
port and multi-ports supported by host controller, when the host
supports mult-ports, only port0 (u2/u3) is used to support dual
role mode.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1626340078-29111-14-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/mtu3/mtu3_plat.c b/drivers/usb/mtu3/mtu3_plat.c
index e174ada..81266f3 100644
--- a/drivers/usb/mtu3/mtu3_plat.c
+++ b/drivers/usb/mtu3/mtu3_plat.c
@@ -45,6 +45,29 @@ int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks)
return 0;
}
+static int wait_for_ip_sleep(struct ssusb_mtk *ssusb)
+{
+ bool sleep_check = true;
+ u32 value;
+ int ret;
+
+ if (!ssusb->is_host)
+ sleep_check = ssusb_gadget_ip_sleep_check(ssusb);
+
+ if (!sleep_check)
+ return 0;
+
+ /* wait for ip enter sleep mode */
+ ret = readl_poll_timeout(ssusb->ippc_base + U3D_SSUSB_IP_PW_STS1, value,
+ (value & SSUSB_IP_SLEEP_STS), 100, 100000);
+ if (ret) {
+ dev_err(ssusb->dev, "ip sleep failed!!!\n");
+ ret = -EBUSY;
+ }
+
+ return ret;
+}
+
static int ssusb_phy_init(struct ssusb_mtk *ssusb)
{
int i;
@@ -421,6 +444,28 @@ static int mtu3_remove(struct platform_device *pdev)
return 0;
}
+static int resume_ip_and_ports(struct ssusb_mtk *ssusb, pm_message_t msg)
+{
+ switch (ssusb->dr_mode) {
+ case USB_DR_MODE_PERIPHERAL:
+ ssusb_gadget_resume(ssusb, msg);
+ break;
+ case USB_DR_MODE_HOST:
+ ssusb_host_resume(ssusb, false);
+ break;
+ case USB_DR_MODE_OTG:
+ ssusb_host_resume(ssusb, !ssusb->is_host);
+ if (!ssusb->is_host)
+ ssusb_gadget_resume(ssusb, msg);
+
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int mtu3_suspend_common(struct device *dev, pm_message_t msg)
{
struct ssusb_mtk *ssusb = dev_get_drvdata(dev);
@@ -432,26 +477,36 @@ static int mtu3_suspend_common(struct device *dev, pm_message_t msg)
case USB_DR_MODE_PERIPHERAL:
ret = ssusb_gadget_suspend(ssusb, msg);
if (ret)
- return ret;
+ goto err;
break;
case USB_DR_MODE_HOST:
ssusb_host_suspend(ssusb);
break;
case USB_DR_MODE_OTG:
- if (!ssusb->is_host)
- return 0;
-
+ if (!ssusb->is_host) {
+ ret = ssusb_gadget_suspend(ssusb, msg);
+ if (ret)
+ goto err;
+ }
ssusb_host_suspend(ssusb);
break;
default:
return -EINVAL;
}
+
+ ret = wait_for_ip_sleep(ssusb);
+ if (ret)
+ goto sleep_err;
+
ssusb_phy_power_off(ssusb);
clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
ssusb_wakeup_set(ssusb, true);
- return 0;
+sleep_err:
+ resume_ip_and_ports(ssusb, msg);
+err:
+ return ret;
}
static int mtu3_resume_common(struct device *dev, pm_message_t msg)
@@ -470,24 +525,7 @@ static int mtu3_resume_common(struct device *dev, pm_message_t msg)
if (ret)
goto phy_err;
- switch (ssusb->dr_mode) {
- case USB_DR_MODE_PERIPHERAL:
- ssusb_gadget_resume(ssusb, msg);
- break;
- case USB_DR_MODE_HOST:
- ssusb_host_resume(ssusb, false);
- break;
- case USB_DR_MODE_OTG:
- if (!ssusb->is_host)
- return 0;
-
- ssusb_host_resume(ssusb, true);
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
+ return resume_ip_and_ports(ssusb, msg);
phy_err:
clk_bulk_disable_unprepare(BULK_CLKS_CNT, ssusb->clks);
