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phy: tegra: xusb: Tegra210 host mode VBUS control 

To support XUSB host controller ELPG, this commit moves VBUS control
.phy_power_on()/.phy_power_off() to .phy_init()/.phy_exit().
When XUSB host controller enters ELPG, host driver invokes
.phy_power_off(), VBUS should remain ON so that USB devices will not
disconnect. VBUS can be turned OFF when host driver invokes
.phy_exit() which indicates disabling a USB port.

Signed-off-by: JC Kuo <jckuo@nvidia.com>
Acked-By: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
JC Kuo 2021-01-20 15:34:11 +08:00 committed by Thierry Reding
parent 2d10214872
commit 0baabcbedd
1 changed files with 40 additions and 12 deletions
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52
drivers/phy/tegra/xusb-tegra210.c
View File

@ -1799,8 +1799,25 @@ static int tegra210_usb2_phy_init(struct phy *phy)
{
struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
unsigned int index = lane->index;
struct tegra_xusb_usb2_port *port;
int err;
u32 value;
port = tegra_xusb_find_usb2_port(padctl, index);
if (!port) {
dev_err(&phy->dev, "no port found for USB2 lane %u\n", index);
return -ENODEV;
}
if (port->supply && port->mode == USB_DR_MODE_HOST) {
err = regulator_enable(port->supply);
if (err)
return err;
}
mutex_lock(&padctl->lock);
value = padctl_readl(padctl, XUSB_PADCTL_USB2_PAD_MUX);
value &= ~(XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_MASK <<
XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_SHIFT);
@ -1808,11 +1825,30 @@ static int tegra210_usb2_phy_init(struct phy *phy)
XUSB_PADCTL_USB2_PAD_MUX_USB2_BIAS_PAD_SHIFT;
padctl_writel(padctl, value, XUSB_PADCTL_USB2_PAD_MUX);
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra210_usb2_phy_exit(struct phy *phy)
{
struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
struct tegra_xusb_padctl *padctl = lane->pad->padctl;
struct tegra_xusb_usb2_port *port;
int err;
port = tegra_xusb_find_usb2_port(padctl, lane->index);
if (!port) {
dev_err(&phy->dev, "no port found for USB2 lane %u\n", lane->index);
return -ENODEV;
}
if (port->supply && port->mode == USB_DR_MODE_HOST) {
err = regulator_disable(port->supply);
if (err)
return err;
}
return 0;
}
@ -1933,6 +1969,8 @@ static int tegra210_usb2_phy_power_on(struct phy *phy)
priv = to_tegra210_xusb_padctl(padctl);
mutex_lock(&padctl->lock);
if (port->usb3_port_fake != -1) {
value = padctl_readl(padctl, XUSB_PADCTL_SS_PORT_MAP);
value &= ~XUSB_PADCTL_SS_PORT_MAP_PORTX_MAP_MASK(
@ -2026,14 +2064,6 @@ static int tegra210_usb2_phy_power_on(struct phy *phy)
padctl_writel(padctl, value,
XUSB_PADCTL_USB2_BATTERY_CHRG_OTGPADX_CTL1(index));
if (port->supply && port->mode == USB_DR_MODE_HOST) {
err = regulator_enable(port->supply);
if (err)
return err;
}
mutex_lock(&padctl->lock);
if (pad->enable > 0) {
pad->enable++;
mutex_unlock(&padctl->lock);
@ -2042,7 +2072,7 @@ static int tegra210_usb2_phy_power_on(struct phy *phy)
err = clk_prepare_enable(pad->clk);
if (err)
goto disable_regulator;
goto out;
value = padctl_readl(padctl, XUSB_PADCTL_USB2_BIAS_PAD_CTL1);
value &= ~((XUSB_PADCTL_USB2_BIAS_PAD_CTL1_TRK_START_TIMER_MASK <<
@ -2074,8 +2104,7 @@ static int tegra210_usb2_phy_power_on(struct phy *phy)
return 0;
disable_regulator:
regulator_disable(port->supply);
out:
mutex_unlock(&padctl->lock);
return err;
}
@ -2134,7 +2163,6 @@ static int tegra210_usb2_phy_power_off(struct phy *phy)
padctl_writel(padctl, value, XUSB_PADCTL_USB2_BIAS_PAD_CTL0);
out:
regulator_disable(port->supply);
mutex_unlock(&padctl->lock);
return 0;
}