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Date: Mon, 22 Jun 2015 15:42:29 +0100
From: Phil Edworthy <phil.edworthy@...esas.com>
To: Kishon Vijay Abraham I <kishon@...com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
Simon Horman <horms@...ge.net.au>
Cc: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
<linux-sh@...r.kernel.org>,
Phil Edworthy <phil.edworthy@...esas.com>
Subject: [PATCH 1/3] usb: renesas_usbhs: Allow an OTG PHY driver to provide VBUS
These changes allow a PHY driver to trigger a VBUS interrupt and
to provide the value of VBUS.
Signed-off-by: Phil Edworthy <phil.edworthy@...esas.com>
---
drivers/usb/renesas_usbhs/common.h | 2 ++
drivers/usb/renesas_usbhs/mod.c | 3 +++
drivers/usb/renesas_usbhs/mod_gadget.c | 38 ++++++++++++++++++++++++++++++++++
3 files changed, 43 insertions(+)
diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h
index 8c5fc12..94a7aeb 100644
--- a/drivers/usb/renesas_usbhs/common.h
+++ b/drivers/usb/renesas_usbhs/common.h
@@ -255,6 +255,8 @@ struct usbhs_priv {
struct renesas_usbhs_driver_param dparam;
struct delayed_work notify_hotplug_work;
+ int vbus_is_indirect;
+ int vbus_indirect_value;
struct platform_device *pdev;
struct extcon_dev *edev;
diff --git a/drivers/usb/renesas_usbhs/mod.c b/drivers/usb/renesas_usbhs/mod.c
index 9a705b1..8a2d3dd 100644
--- a/drivers/usb/renesas_usbhs/mod.c
+++ b/drivers/usb/renesas_usbhs/mod.c
@@ -42,6 +42,9 @@ static int usbhsm_autonomy_get_vbus(struct platform_device *pdev)
{
struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+ if (priv->vbus_is_indirect)
+ return priv->vbus_indirect_value;
+
return VBSTS & usbhs_read(priv, INTSTS0);
}
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index dc2aa32..2cfdb50 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -21,6 +21,7 @@
#include <linux/platform_device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
#include "common.h"
/*
@@ -50,6 +51,7 @@ struct usbhsg_gpriv {
int uep_size;
struct usb_gadget_driver *driver;
+ struct usb_phy *transceiver;
u32 status;
#define USBHSG_STATUS_STARTED (1 << 0)
@@ -882,6 +884,8 @@ static int usbhsg_gadget_start(struct usb_gadget *gadget,
{
struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
+ struct device *dev = usbhs_priv_to_dev(priv);
+ int ret;
if (!driver ||
!driver->setup ||
@@ -891,6 +895,17 @@ static int usbhsg_gadget_start(struct usb_gadget *gadget,
/* first hook up the driver ... */
gpriv->driver = driver;
+ /* connect to bus through transceiver */
+ if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
+ ret = otg_set_peripheral(gpriv->transceiver->otg,
+ &gpriv->gadget);
+ if (ret) {
+ dev_info(dev, "%s: can't bind to transceiver\n",
+ gpriv->gadget.name);
+ return ret;
+ }
+ }
+
return usbhsg_try_start(priv, USBHSG_STATUS_REGISTERD);
}
@@ -900,6 +915,10 @@ static int usbhsg_gadget_stop(struct usb_gadget *gadget)
struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
usbhsg_try_stop(priv, USBHSG_STATUS_REGISTERD);
+
+ if (!IS_ERR_OR_NULL(gpriv->transceiver))
+ (void) otg_set_peripheral(gpriv->transceiver->otg, NULL);
+
gpriv->driver = NULL;
return 0;
@@ -947,12 +966,27 @@ static int usbhsg_set_selfpowered(struct usb_gadget *gadget, int is_self)
return 0;
}
+static int usbhsg_vbus_session(struct usb_gadget *gadget, int is_active)
+{
+ struct usbhsg_gpriv *gpriv = usbhsg_gadget_to_gpriv(gadget);
+ struct usbhs_priv *priv = usbhsg_gpriv_to_priv(gpriv);
+ struct platform_device *pdev = usbhs_priv_to_pdev(priv);
+
+ priv->vbus_is_indirect = 1;
+ priv->vbus_indirect_value = !!is_active;
+
+ renesas_usbhs_call_notify_hotplug(pdev);
+
+ return 0;
+}
+
static const struct usb_gadget_ops usbhsg_gadget_ops = {
.get_frame = usbhsg_get_frame,
.set_selfpowered = usbhsg_set_selfpowered,
.udc_start = usbhsg_gadget_start,
.udc_stop = usbhsg_gadget_stop,
.pullup = usbhsg_pullup,
+ .vbus_session = usbhsg_vbus_session,
};
static int usbhsg_start(struct usbhs_priv *priv)
@@ -994,6 +1028,10 @@ int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
goto usbhs_mod_gadget_probe_err_gpriv;
}
+ gpriv->transceiver = usb_get_phy(USB_PHY_TYPE_UNDEFINED);
+ dev_info(dev, "%s transceiver found\n",
+ gpriv->transceiver ? "" : "No");
+
/*
* CAUTION
*
--
1.9.1
--
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