redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

phy: phy-mtk-tphy: use auto instead of force to bypass utmi signals 

commit 00c0092c5f upstream.

When system is running, if usb2 phy is forced to bypass utmi signals,
all PLL will be turned off, and it can't detect device connection
anymore, so replace force mode with auto mode which can bypass utmi
signals automatically if no device attached for normal flow.
But keep the force mode to fix RX sensitivity degradation issue.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Chunfeng Yun 2017-12-07 19:53:34 +08:00 committed by Greg Kroah-Hartman
parent 2424869e4c
commit 4290940dcb
1 changed files with 7 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/phy/mediatek/phy-mtk-tphy.c
View File

@ -438,9 +438,9 @@ static void u2_phy_instance_init(struct mtk_tphy *tphy,
u32 index = instance->index;
u32 tmp;
/* switch to USB function. (system register, force ip into usb mode) */
/* switch to USB function, and enable usb pll */
tmp = readl(com + U3P_U2PHYDTM0);
tmp &= ~P2C_FORCE_UART_EN;
tmp &= ~(P2C_FORCE_UART_EN | P2C_FORCE_SUSPENDM);
tmp |= P2C_RG_XCVRSEL_VAL(1) | P2C_RG_DATAIN_VAL(0);
writel(tmp, com + U3P_U2PHYDTM0);
@ -500,10 +500,8 @@ static void u2_phy_instance_power_on(struct mtk_tphy *tphy,
u32 index = instance->index;
u32 tmp;
/* (force_suspendm=0) (let suspendm=1, enable usb 480MHz pll) */
tmp = readl(com + U3P_U2PHYDTM0);
tmp &= ~(P2C_FORCE_SUSPENDM | P2C_RG_XCVRSEL);
tmp &= ~(P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
tmp &= ~(P2C_RG_XCVRSEL | P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
writel(tmp, com + U3P_U2PHYDTM0);
/* OTG Enable */
@ -538,7 +536,6 @@ static void u2_phy_instance_power_off(struct mtk_tphy *tphy,
tmp = readl(com + U3P_U2PHYDTM0);
tmp &= ~(P2C_RG_XCVRSEL | P2C_RG_DATAIN);
tmp |= P2C_FORCE_SUSPENDM;
writel(tmp, com + U3P_U2PHYDTM0);
/* OTG Disable */
@ -546,18 +543,16 @@ static void u2_phy_instance_power_off(struct mtk_tphy *tphy,
tmp &= ~PA6_RG_U2_OTG_VBUSCMP_EN;
writel(tmp, com + U3P_USBPHYACR6);
/* let suspendm=0, set utmi into analog power down */
tmp = readl(com + U3P_U2PHYDTM0);
tmp &= ~P2C_RG_SUSPENDM;
writel(tmp, com + U3P_U2PHYDTM0);
udelay(1);
tmp = readl(com + U3P_U2PHYDTM1);
tmp &= ~(P2C_RG_VBUSVALID | P2C_RG_AVALID);
tmp |= P2C_RG_SESSEND;
writel(tmp, com + U3P_U2PHYDTM1);
if (tphy->pdata->avoid_rx_sen_degradation && index) {
tmp = readl(com + U3P_U2PHYDTM0);
tmp &= ~(P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM);
writel(tmp, com + U3P_U2PHYDTM0);
tmp = readl(com + U3D_U2PHYDCR0);
tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
writel(tmp, com + U3D_U2PHYDCR0);