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Diffstat (limited to 'target/linux/bcm4908/patches-5.4/084-v5.6-0004-phy-usb-Add-wake-on-functionality.patch')
-rw-r--r--target/linux/bcm4908/patches-5.4/084-v5.6-0004-phy-usb-Add-wake-on-functionality.patch205
1 files changed, 205 insertions, 0 deletions
diff --git a/target/linux/bcm4908/patches-5.4/084-v5.6-0004-phy-usb-Add-wake-on-functionality.patch b/target/linux/bcm4908/patches-5.4/084-v5.6-0004-phy-usb-Add-wake-on-functionality.patch
new file mode 100644
index 0000000000..d52edfef77
--- /dev/null
+++ b/target/linux/bcm4908/patches-5.4/084-v5.6-0004-phy-usb-Add-wake-on-functionality.patch
@@ -0,0 +1,205 @@
+From f1c0db40a3ade1f1a39e5794d728f2953d817322 Mon Sep 17 00:00:00 2001
+From: Al Cooper <alcooperx@gmail.com>
+Date: Fri, 3 Jan 2020 13:18:02 -0500
+Subject: [PATCH] phy: usb: Add "wake on" functionality
+
+Add the ability to handle USB wake events from USB devices when
+in S2 mode. Typically there is some additional configuration
+needed to tell the USB device to generate the wake event when
+suspended but this varies with the different USB device classes.
+For example, on USB Ethernet dongles, ethtool should be used to
+enable the magic packet wake functionality in the dongle.
+NOTE: This requires that the "power/wakeup" sysfs entry for
+the USB device generating the wakeup be set to "enabled".
+
+This functionality requires a special hardware sideband path that
+will trigger the AON_PM_L2 interrupt needed to wake the system from
+S2 even though the USB host controllers are in IDDQ (low power state)
+and most USB related clocks are shut off. For the sideband signaling
+to work we need to leave the usbx_freerun clock running, but this
+clock consumes very little power by design. There's a bug in the
+XHCI wake hardware so only EHCI/OHCI wake is currently supported.
+
+Signed-off-by: Al Cooper <alcooperx@gmail.com>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
+---
+ drivers/phy/broadcom/phy-brcm-usb-init.c | 17 +++++++++
+ drivers/phy/broadcom/phy-brcm-usb-init.h | 1 +
+ drivers/phy/broadcom/phy-brcm-usb.c | 48 ++++++++++++++++++++++--
+ 3 files changed, 63 insertions(+), 3 deletions(-)
+
+--- 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_us
+ 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_us
+ 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;
+--- 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_
+ 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 */
+--- 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
+ 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
+ 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
+ .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
+ 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 pla
+ 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 d
+ 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 de
+
+ 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 de
+ * 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-30 23:36:38 +0000