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usb: renesas_usbhs: Allow an OTG PHY driver to provide VBUS

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These changes allow a PHY driver to trigger a VBUS interrupt and
to provide the value of VBUS.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Phil Edworthy 2015-07-13 16:30:18 +01:00 committed by Felipe Balbi
parent 9e832bf7c0
commit b5a2875605
1 changed files with 62 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

62
drivers/usb/renesas_usbhs/mod_gadget.c
View file

@ -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)
@ -872,6 +875,27 @@ static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
return 0;
}
/*
* 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
*