[PATCH v2 11/13] usb: mtu3: add helper to power on/down device
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
Date: 2021-06-18 09:30:47
Also in:
linux-devicetree, linux-mediatek, linux-usb, lkml
Subsystem:
mediatek usb3 drd ip driver, the rest, usb subsystem · Maintainers:
Chunfeng Yun, Linus Torvalds, Greg Kroah-Hartman
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
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