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Date: Mon, 13 Jul 2015 16:30:18 +0100
From: Phil Edworthy <phil.edworthy@...esas.com>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Felipe Balbi <balbi@...com>,
Ulrich Hecht <ulrich.hecht@...il.com>,
Kishon Vijay Abraham I <kishon@...com>,
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 v6] 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>
---
v6:
- Rename vbus_indirect_value to vbus_active
v5:
- Avoid race when vbus_is_indirect may or may not be read
before the phy has called vbus_session. In doing so, the
changes have also been isolated to mod_gadget.c
v4:
- Use true/false with bool vars.
- Clean up "transceiver found" message.
v3:
- Changed how indirect vbus is plumbed in.
- Removed unnecessary (void) on call to otg_set_peripheral.
- Moved code that connects to bus through transceiver so it
is before setting gpriv->driver.
v2:
- vbus variables changed from int to bool.
- dev_info() changed to dev_err()
usb: renesas_usbhs: fixes
---
drivers/usb/renesas_usbhs/mod_gadget.c | 62 ++++++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index dc2aa32..54f916f 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 +51,8 @@ struct usbhsg_gpriv {
int uep_size;
struct usb_gadget_driver *driver;
+ struct usb_phy *transceiver;
+ bool vbus_active;
u32 status;
#define USBHSG_STATUS_STARTED (1 << 0)
@@ -873,6 +876,27 @@ static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
}
/*
+ * VBUS provided by the PHY
+ */
+static int usbhsm_phy_get_vbus(struct platform_device *pdev)
+{
+ struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
+ struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
+
+ return gpriv->vbus_active;
+}
+
+static void usbhs_mod_phy_mode(struct usbhs_priv *priv)
+{
+ struct usbhs_mod_info *info = &priv->mod_info;
+
+ info->irq_vbus = NULL;
+ priv->pfunc.get_vbus = usbhsm_phy_get_vbus;
+
+ usbhs_irq_callback_update(priv, NULL);
+}
+
+/*
*
* linux usb function
*
@@ -882,12 +906,28 @@ 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 ||
driver->max_speed < USB_SPEED_FULL)
return -EINVAL;
+ /* connect to bus through transceiver */
+ if (!IS_ERR_OR_NULL(gpriv->transceiver)) {
+ ret = otg_set_peripheral(gpriv->transceiver->otg,
+ &gpriv->gadget);
+ if (ret) {
+ dev_err(dev, "%s: can't bind to transceiver\n",
+ gpriv->gadget.name);
+ return ret;
+ }
+
+ /* get vbus using phy versions */
+ usbhs_mod_phy_mode(priv);
+ }
+
/* first hook up the driver ... */
gpriv->driver = driver;
@@ -900,6 +940,10 @@ 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))
+ otg_set_peripheral(gpriv->transceiver->otg, NULL);
+
gpriv->driver = NULL;
return 0;
@@ -947,12 +991,26 @@ 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);
+
+ gpriv->vbus_active = !!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 +1052,10 @@ 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, "%stransceiver found\n",
+ gpriv->transceiver ? "" : "no ");
+
/*
* CAUTION
*
--
1.9.1
--
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