[PATCH v2 11/13] usb: mtu3: add helper to power on/down device

Chunfeng Yun
2021-06-18T09:30:45Z

Add helper to power on/down device ports and ip, it will be
used when support device suspend/resume

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2: no changes
---
drivers/usb/mtu3/mtu3_core.c | 36 ++++++++++++++++++++++++------------
1 file changed, 24 insertions(+), 12 deletions(-)

diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index 6d23acb4fffc..648e970d77ba 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -141,6 +141,28 @@ static void mtu3_device_disable(struct mtu3 *mtu)
mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
}

+static void mtu3_dev_power_on(struct mtu3 *mtu)
+{
+ void __iomem *ibase = mtu->ippc_base;
+
+ mtu3_clrbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+ if (mtu->is_u3_ip)
+ mtu3_clrbits(ibase, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+
+ mtu3_clrbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
+}
+
+static void mtu3_dev_power_down(struct mtu3 *mtu)
+{
+ void __iomem *ibase = mtu->ippc_base;
+
+ if (mtu->is_u3_ip)
+ mtu3_setbits(ibase, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
+
+ mtu3_setbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
+ mtu3_setbits(ibase, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+}
+
/* reset U3D's device module. */
static void mtu3_device_reset(struct mtu3 *mtu)
{
@@ -333,12 +355,7 @@ void mtu3_start(struct mtu3 *mtu)
dev_dbg(mtu->dev, "%s devctl 0x%x\n", __func__,
mtu3_readl(mbase, U3D_DEVICE_CONTROL));

- mtu3_clrbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
- if (mtu->is_u3_ip)
- mtu3_clrbits(mtu->ippc_base, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
-
- mtu3_clrbits(mtu->ippc_base, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
-
+ mtu3_dev_power_on(mtu);
mtu3_csr_init(mtu);
mtu3_set_speed(mtu, mtu->speed);

@@ -360,12 +377,7 @@ void mtu3_stop(struct mtu3 *mtu)
mtu3_dev_on_off(mtu, 0);

mtu->is_active = 0;
-
- if (mtu->is_u3_ip)
- mtu3_setbits(mtu->ippc_base, SSUSB_U3_CTRL(0), SSUSB_U3_PORT_PDN);
-
- mtu3_setbits(mtu->ippc_base, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_PDN);
- mtu3_setbits(mtu->ippc_base, U3D_SSUSB_IP_PW_CTRL2, SSUSB_IP_DEV_PDN);
+ mtu3_dev_power_down(mtu);
}

/* for non-ep0 */
--
2.18.0