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-rw-r--r--drivers/phy/broadcom/phy-brcm-usb-init.c17
-rw-r--r--drivers/phy/broadcom/phy-brcm-usb-init.h1
-rw-r--r--drivers/phy/broadcom/phy-brcm-usb.c48
3 files changed, 63 insertions, 3 deletions
diff --git a/drivers/phy/broadcom/phy-brcm-usb-init.c b/drivers/phy/broadcom/phy-brcm-usb-init.c
index ac7f7995c11f..58882c10396a 100644
--- a/drivers/phy/broadcom/phy-brcm-usb-init.c
+++ b/drivers/phy/broadcom/phy-brcm-usb-init.c
@@ -58,6 +58,8 @@
#define USB_CTRL_USB_PM_SOFT_RESET_MASK 0x40000000 /* option */
#define USB_CTRL_USB_PM_USB20_HC_RESETB_MASK 0x30000000 /* option */
#define USB_CTRL_USB_PM_USB20_HC_RESETB_VAR_MASK 0x00300000 /* option */
+#define USB_CTRL_USB_PM_RMTWKUP_EN_MASK 0x00000001
+#define USB_CTRL_USB_PM_STATUS 0x38
#define USB_CTRL_USB30_CTL1 0x60
#define USB_CTRL_USB30_CTL1_PHY3_PLL_SEQ_START_MASK 0x00000010
#define USB_CTRL_USB30_CTL1_PHY3_RESETB_MASK 0x00010000
@@ -855,6 +857,10 @@ void brcm_usb_init_common(struct brcm_usb_init_params *params)
u32 reg;
void __iomem *ctrl = params->ctrl_regs;
+ /* Clear any pending wake conditions */
+ reg = brcmusb_readl(USB_CTRL_REG(ctrl, USB_PM_STATUS));
+ brcmusb_writel(reg, USB_CTRL_REG(ctrl, USB_PM_STATUS));
+
/* Take USB out of power down */
if (USB_CTRL_MASK_FAMILY(params, PLL_CTL, PLL_IDDQ_PWRDN)) {
USB_CTRL_UNSET_FAMILY(params, PLL_CTL, PLL_IDDQ_PWRDN);
@@ -1010,6 +1016,17 @@ void brcm_usb_uninit_xhci(struct brcm_usb_init_params *params)
USB_CTRL_SET(params->ctrl_regs, USB30_PCTL, PHY3_IDDQ_OVERRIDE);
}
+void brcm_usb_wake_enable(struct brcm_usb_init_params *params,
+ int enable)
+{
+ void __iomem *ctrl = params->ctrl_regs;
+
+ if (enable)
+ USB_CTRL_SET(ctrl, USB_PM, RMTWKUP_EN);
+ else
+ USB_CTRL_UNSET(ctrl, USB_PM, RMTWKUP_EN);
+}
+
void brcm_usb_set_family_map(struct brcm_usb_init_params *params)
{
int fam;
diff --git a/drivers/phy/broadcom/phy-brcm-usb-init.h b/drivers/phy/broadcom/phy-brcm-usb-init.h
index f4f4f6d5d258..f473e0c51f0b 100644
--- a/drivers/phy/broadcom/phy-brcm-usb-init.h
+++ b/drivers/phy/broadcom/phy-brcm-usb-init.h
@@ -38,5 +38,6 @@ void brcm_usb_init_xhci(struct brcm_usb_init_params *ini);
void brcm_usb_uninit_common(struct brcm_usb_init_params *ini);
void brcm_usb_uninit_eohci(struct brcm_usb_init_params *ini);
void brcm_usb_uninit_xhci(struct brcm_usb_init_params *ini);
+void brcm_usb_wake_enable(struct brcm_usb_init_params *params, int enable);
#endif /* _USB_BRCM_COMMON_INIT_H */
diff --git a/drivers/phy/broadcom/phy-brcm-usb.c b/drivers/phy/broadcom/phy-brcm-usb.c
index 634afc803778..cca04d60f2d2 100644
--- a/drivers/phy/broadcom/phy-brcm-usb.c
+++ b/drivers/phy/broadcom/phy-brcm-usb.c
@@ -57,11 +57,22 @@ struct brcm_usb_phy_data {
bool has_xhci;
struct clk *usb_20_clk;
struct clk *usb_30_clk;
+ struct clk *suspend_clk;
struct mutex mutex; /* serialize phy init */
int init_count;
+ int wake_irq;
struct brcm_usb_phy phys[BRCM_USB_PHY_ID_MAX];
};
+static irqreturn_t brcm_usb_phy_wake_isr(int irq, void *dev_id)
+{
+ struct phy *gphy = dev_id;
+
+ pm_wakeup_event(&gphy->dev, 0);
+
+ return IRQ_HANDLED;
+}
+
static int brcm_usb_phy_init(struct phy *gphy)
{
struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
@@ -76,6 +87,7 @@ static int brcm_usb_phy_init(struct phy *gphy)
if (priv->init_count++ == 0) {
clk_prepare_enable(priv->usb_20_clk);
clk_prepare_enable(priv->usb_30_clk);
+ clk_prepare_enable(priv->suspend_clk);
brcm_usb_init_common(&priv->ini);
}
mutex_unlock(&priv->mutex);
@@ -108,6 +120,7 @@ static int brcm_usb_phy_exit(struct phy *gphy)
brcm_usb_uninit_common(&priv->ini);
clk_disable_unprepare(priv->usb_20_clk);
clk_disable_unprepare(priv->usb_30_clk);
+ clk_disable_unprepare(priv->suspend_clk);
}
mutex_unlock(&priv->mutex);
phy->inited = false;
@@ -228,11 +241,12 @@ static const struct attribute_group brcm_usb_phy_group = {
.attrs = brcm_usb_phy_attrs,
};
-static int brcm_usb_phy_dvr_init(struct device *dev,
+static int brcm_usb_phy_dvr_init(struct platform_device *pdev,
struct brcm_usb_phy_data *priv,
struct device_node *dn)
{
- struct phy *gphy;
+ struct device *dev = &pdev->dev;
+ struct phy *gphy = NULL;
int err;
priv->usb_20_clk = of_clk_get_by_name(dn, "sw_usb");
@@ -275,6 +289,28 @@ static int brcm_usb_phy_dvr_init(struct device *dev,
if (err)
return err;
}
+
+ priv->suspend_clk = clk_get(dev, "usb0_freerun");
+ if (IS_ERR(priv->suspend_clk)) {
+ dev_err(dev, "Suspend Clock not found in Device Tree\n");
+ priv->suspend_clk = NULL;
+ }
+
+ priv->wake_irq = platform_get_irq_byname(pdev, "wake");
+ if (priv->wake_irq < 0)
+ priv->wake_irq = platform_get_irq_byname(pdev, "wakeup");
+ if (priv->wake_irq >= 0) {
+ err = devm_request_irq(dev, priv->wake_irq,
+ brcm_usb_phy_wake_isr, 0,
+ dev_name(dev), gphy);
+ if (err < 0)
+ return err;
+ device_set_wakeup_capable(dev, 1);
+ } else {
+ dev_info(dev,
+ "Wake interrupt missing, system wake not supported\n");
+ }
+
return 0;
}
@@ -335,7 +371,7 @@ static int brcm_usb_phy_probe(struct platform_device *pdev)
if (of_property_read_bool(dn, "brcm,has-eohci"))
priv->has_eohci = true;
- err = brcm_usb_phy_dvr_init(dev, priv, dn);
+ err = brcm_usb_phy_dvr_init(pdev, priv, dn);
if (err)
return err;
@@ -386,10 +422,13 @@ static int brcm_usb_phy_suspend(struct device *dev)
if (priv->phys[BRCM_USB_PHY_2_0].inited)
brcm_usb_uninit_eohci(&priv->ini);
brcm_usb_uninit_common(&priv->ini);
+ brcm_usb_wake_enable(&priv->ini, true);
if (priv->phys[BRCM_USB_PHY_3_0].inited)
clk_disable_unprepare(priv->usb_30_clk);
if (priv->phys[BRCM_USB_PHY_2_0].inited)
clk_disable_unprepare(priv->usb_20_clk);
+ if (priv->wake_irq >= 0)
+ enable_irq_wake(priv->wake_irq);
}
return 0;
}
@@ -400,6 +439,7 @@ static int brcm_usb_phy_resume(struct device *dev)
clk_prepare_enable(priv->usb_20_clk);
clk_prepare_enable(priv->usb_30_clk);
+ brcm_usb_wake_enable(&priv->ini, false);
brcm_usb_init_ipp(&priv->ini);
/*
@@ -407,6 +447,8 @@ static int brcm_usb_phy_resume(struct device *dev)
* Uninitialize anything that wasn't previously initialized.
*/
if (priv->init_count) {
+ if (priv->wake_irq >= 0)
+ disable_irq_wake(priv->wake_irq);
brcm_usb_init_common(&priv->ini);
if (priv->phys[BRCM_USB_PHY_2_0].inited) {
brcm_usb_init_eohci(&priv->ini);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.