01793e8752
Refreshed all patches. Removed upstreamed patches: - 037-v4.18-0008-ARM-dts-BCM5301x-Fix-i2c-controller-interrupt-type.patch Compile-tested on: cns3xxx, imx6 Runtime-tested on: cns3xxx, imx6 Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
109 lines
3.3 KiB
Diff
109 lines
3.3 KiB
Diff
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
|
|
@@ -914,6 +915,7 @@ 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
|
|
*
|
|
@@ -3342,6 +3359,7 @@ 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) {
|
|
@@ -4448,6 +4466,9 @@ static int _dwc2_hcd_start(struct usb_hc
|
|
}
|
|
|
|
spin_unlock_irqrestore(&hsotg->lock, flags);
|
|
+
|
|
+ dwc2_vbus_supply_init(hsotg);
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
@@ -4475,6 +4496,8 @@ 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);
|
|
}
|
|
|
|
@@ -4511,6 +4534,7 @@ 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 */
|
|
@@ -4591,6 +4615,8 @@ 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);
|
|
|