diff options
3 files changed, 165 insertions, 1 deletions
diff --git a/target/linux/generic/backport-4.14/030-v4.17-0001-usb-dwc2-add-support-for-host-mode-external-vbus-sup.patch b/target/linux/generic/backport-4.14/030-v4.17-0001-usb-dwc2-add-support-for-host-mode-external-vbus-sup.patch new file mode 100644 index 0000000000..f490639f39 --- /dev/null +++ b/target/linux/generic/backport-4.14/030-v4.17-0001-usb-dwc2-add-support-for-host-mode-external-vbus-sup.patch @@ -0,0 +1,109 @@ +From 531ef5ebea96394ddb7f554d4d88e017dde30a59 Mon Sep 17 00:00:00 2001 +From: Amelie Delaunay <amelie.delaunay@st.com> +Date: Tue, 13 Feb 2018 09:28:12 +0100 +Subject: [PATCH] usb: dwc2: add support for host mode external vbus supply + +This patch adds a way to enable an external vbus supply in host mode, +when dwc2 drvvbus signal is not used. + +This patch is very similar to the one done in U-Boot dwc2 driver [1]. It +also adds dynamic vbus supply management depending on the role and state +of the core. + +[1] https://lists.denx.de/pipermail/u-boot/2017-March/283434.html + +Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> +Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> +--- + drivers/usb/dwc2/core.h | 2 ++ + drivers/usb/dwc2/hcd.c | 26 ++++++++++++++++++++++++++ + 2 files changed, 28 insertions(+) + +--- a/drivers/usb/dwc2/core.h ++++ b/drivers/usb/dwc2/core.h +@@ -777,6 +777,7 @@ struct dwc2_hregs_backup { + * @plat: The platform specific configuration data. This can be + * removed once all SoCs support usb transceiver. + * @supplies: Definition of USB power supplies ++ * @vbus_supply: Regulator supplying vbus. + * @phyif: PHY interface width + * @lock: Spinlock that protects all the driver data structures + * @priv: Stores a pointer to the struct usb_hcd +@@ -913,6 +914,7 @@ struct dwc2_hsotg { + struct usb_phy *uphy; + struct dwc2_hsotg_plat *plat; + struct regulator_bulk_data supplies[DWC2_NUM_SUPPLIES]; ++ struct regulator *vbus_supply; + u32 phyif; + + spinlock_t lock; +--- a/drivers/usb/dwc2/hcd.c ++++ b/drivers/usb/dwc2/hcd.c +@@ -359,6 +359,23 @@ static void dwc2_gusbcfg_init(struct dwc + dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); + } + ++static int dwc2_vbus_supply_init(struct dwc2_hsotg *hsotg) ++{ ++ hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus"); ++ if (IS_ERR(hsotg->vbus_supply)) ++ return 0; ++ ++ return regulator_enable(hsotg->vbus_supply); ++} ++ ++static int dwc2_vbus_supply_exit(struct dwc2_hsotg *hsotg) ++{ ++ if (hsotg->vbus_supply) ++ return regulator_disable(hsotg->vbus_supply); ++ ++ return 0; ++} ++ + /** + * dwc2_enable_host_interrupts() - Enables the Host mode interrupts + * +@@ -3246,6 +3263,7 @@ static void dwc2_conn_id_status_change(s + + /* B-Device connector (Device Mode) */ + if (gotgctl & GOTGCTL_CONID_B) { ++ dwc2_vbus_supply_exit(hsotg); + /* Wait for switch to device mode */ + dev_dbg(hsotg->dev, "connId B\n"); + if (hsotg->bus_suspended) { +@@ -4352,6 +4370,9 @@ static int _dwc2_hcd_start(struct usb_hc + } + + spin_unlock_irqrestore(&hsotg->lock, flags); ++ ++ dwc2_vbus_supply_init(hsotg); ++ + return 0; + } + +@@ -4379,6 +4400,8 @@ static void _dwc2_hcd_stop(struct usb_hc + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + spin_unlock_irqrestore(&hsotg->lock, flags); + ++ dwc2_vbus_supply_exit(hsotg); ++ + usleep_range(1000, 3000); + } + +@@ -4415,6 +4438,7 @@ static int _dwc2_hcd_suspend(struct usb_ + hprt0 |= HPRT0_SUSP; + hprt0 &= ~HPRT0_PWR; + dwc2_writel(hprt0, hsotg->regs + HPRT0); ++ dwc2_vbus_supply_exit(hsotg); + } + + /* Enter hibernation */ +@@ -4495,6 +4519,8 @@ static int _dwc2_hcd_resume(struct usb_h + spin_unlock_irqrestore(&hsotg->lock, flags); + dwc2_port_resume(hsotg); + } else { ++ dwc2_vbus_supply_init(hsotg); ++ + /* Wait for controller to correctly update D+/D- level */ + usleep_range(3000, 5000); + diff --git a/target/linux/generic/backport-4.14/030-v4.17-0002-usb-dwc2-dwc2_vbus_supply_init-fix-error-check.patch b/target/linux/generic/backport-4.14/030-v4.17-0002-usb-dwc2-dwc2_vbus_supply_init-fix-error-check.patch new file mode 100644 index 0000000000..f3f93af68d --- /dev/null +++ b/target/linux/generic/backport-4.14/030-v4.17-0002-usb-dwc2-dwc2_vbus_supply_init-fix-error-check.patch @@ -0,0 +1,55 @@ +From 438fea2a6325933868aebc20279e2669c9a21207 Mon Sep 17 00:00:00 2001 +From: Tomeu Vizoso <tomeu.vizoso@collabora.com> +Date: Mon, 26 Mar 2018 11:00:01 +0200 +Subject: [PATCH] usb: dwc2: dwc2_vbus_supply_init: fix error check + +devm_regulator_get_optional returns -ENODEV if the regulator isn't +there, so if that's the case we have to make sure not to leave -ENODEV +in the regulator pointer. + +Also, make sure we return 0 in that case, but correctly propagate any +other errors. Also propagate the error from _dwc2_hcd_start. + +Fixes: 531ef5ebea96 ("usb: dwc2: add support for host mode external vbus supply") +Cc: Amelie Delaunay <amelie.delaunay@st.com> +Reviewed-by: Amelie Delaunay <amelie.delaunay@st.com> +Reviewed-by: Heiko Stuebner <heiko@sntech.de> +Reviewed-by: Grigor Tovmasyan <tovmasya@synopsys.com> +Tested-by: Heiko Stuebner <heiko@sntech.de> +Acked-by: Minas Harutyunyan <hminas@synopsys.com> +Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> +Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> +--- + drivers/usb/dwc2/hcd.c | 13 ++++++++----- + 1 file changed, 8 insertions(+), 5 deletions(-) + +--- a/drivers/usb/dwc2/hcd.c ++++ b/drivers/usb/dwc2/hcd.c +@@ -361,9 +361,14 @@ static void dwc2_gusbcfg_init(struct dwc + + static int dwc2_vbus_supply_init(struct dwc2_hsotg *hsotg) + { ++ int ret; ++ + hsotg->vbus_supply = devm_regulator_get_optional(hsotg->dev, "vbus"); +- if (IS_ERR(hsotg->vbus_supply)) +- return 0; ++ if (IS_ERR(hsotg->vbus_supply)) { ++ ret = PTR_ERR(hsotg->vbus_supply); ++ hsotg->vbus_supply = NULL; ++ return ret == -ENODEV ? 0 : ret; ++ } + + return regulator_enable(hsotg->vbus_supply); + } +@@ -4371,9 +4376,7 @@ static int _dwc2_hcd_start(struct usb_hc + + spin_unlock_irqrestore(&hsotg->lock, flags); + +- dwc2_vbus_supply_init(hsotg); +- +- return 0; ++ return dwc2_vbus_supply_init(hsotg); + } + + /* diff --git a/target/linux/ramips/patches-4.14/0032-USB-dwc2-add-device_reset.patch b/target/linux/ramips/patches-4.14/0032-USB-dwc2-add-device_reset.patch index 7d3352e928..0cfd5acdff 100644 --- a/target/linux/ramips/patches-4.14/0032-USB-dwc2-add-device_reset.patch +++ b/target/linux/ramips/patches-4.14/0032-USB-dwc2-add-device_reset.patch @@ -18,7 +18,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org> #include <linux/usb/hcd.h> #include <linux/usb/ch11.h> -@@ -5075,6 +5076,8 @@ int dwc2_hcd_init(struct dwc2_hsotg *hso +@@ -5104,6 +5105,8 @@ int dwc2_hcd_init(struct dwc2_hsotg *hso retval = -ENOMEM; |