usb: mtu3: fix the issue about SetFeature(U1/U2_Enable)

Fix the issue: device doesn't accept LGO_U1/U2:
1. set SW_U1/U2_ACCEPT_ENABLE to eanble controller to accept LGO_U1/U2
    by default;
2. enable/disable controller to initiate requests for transition into
    U1/U2 by SW_U1/U2_REQUEST_ENABLE instead of SW_U1/U2_ACCEPT_ENABLE;

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index 981e4e8..1ffc0bc 100644 (file)
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -578,8 +578,10 @@ static void mtu3_regs_init(struct mtu3 *mtu)
        if (mtu->is_u3_ip) {
                /* disable LGO_U1/U2 by default */
                mtu3_clrbits(mbase, U3D_LINK_POWER_CONTROL,
-                               SW_U1_ACCEPT_ENABLE | SW_U2_ACCEPT_ENABLE |
                                SW_U1_REQUEST_ENABLE | SW_U2_REQUEST_ENABLE);
+               /* enable accept LGO_U1/U2 link command from host */
+               mtu3_setbits(mbase, U3D_LINK_POWER_CONTROL,
+                               SW_U1_ACCEPT_ENABLE | SW_U2_ACCEPT_ENABLE);
                /* device responses to u3_exit from host automatically */
                mtu3_clrbits(mbase, U3D_LTSSM_CTRL, SOFT_U3_EXIT_EN);
                /* automatically build U2 link when U3 detect fail */

diff --git a/drivers/usb/mtu3/mtu3_gadget_ep0.c b/drivers/usb/mtu3/mtu3_gadget_ep0.c
index 25216e7..3c464d8 100644 (file)
--- a/drivers/usb/mtu3/mtu3_gadget_ep0.c
+++ b/drivers/usb/mtu3/mtu3_gadget_ep0.c
@@ -336,9 +336,9 @@ static int ep0_handle_feature_dev(struct mtu3 *mtu,
 
                lpc = mtu3_readl(mbase, U3D_LINK_POWER_CONTROL);
                if (set)
-                       lpc |= SW_U1_ACCEPT_ENABLE;
+                       lpc |= SW_U1_REQUEST_ENABLE;
                else
-                       lpc &= ~SW_U1_ACCEPT_ENABLE;
+                       lpc &= ~SW_U1_REQUEST_ENABLE;
                mtu3_writel(mbase, U3D_LINK_POWER_CONTROL, lpc);
 
                mtu->u1_enable = !!set;
@@ -351,9 +351,9 @@ static int ep0_handle_feature_dev(struct mtu3 *mtu,
 
                lpc = mtu3_readl(mbase, U3D_LINK_POWER_CONTROL);
                if (set)
-                       lpc |= SW_U2_ACCEPT_ENABLE;
+                       lpc |= SW_U2_REQUEST_ENABLE;
                else
-                       lpc &= ~SW_U2_ACCEPT_ENABLE;
+                       lpc &= ~SW_U2_REQUEST_ENABLE;
                mtu3_writel(mbase, U3D_LINK_POWER_CONTROL, lpc);
 
                mtu->u2_enable = !!set;