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Subject[PATCHv6 03/19] usb: otg: Separate otg members from usb_phy
Date
Introducing struct otg and collecting otg specific members
to it from struct usb_phy. There are no changes to
struct usb_phy at this stage. This also renames
transceiver specific functions, and offers aliases for the
old otg ones.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
drivers/usb/otg/otg.c | 18 ++++----
include/linux/usb/otg.h | 96 ++++++++++++++++++++++++++++++++++++++--------
2 files changed, 88 insertions(+), 26 deletions(-)
diff --git a/drivers/usb/otg/otg.c b/drivers/usb/otg/otg.c
index c6f2bed..5fcc020 100644
--- a/drivers/usb/otg/otg.c
+++ b/drivers/usb/otg/otg.c
@@ -17,7 +17,7 @@
static struct usb_phy *xceiv;

/**
- * otg_get_transceiver - find the (single) OTG transceiver
+ * usb_get_transceiver - find the (single) OTG transceiver
*
* Returns the transceiver driver, after getting a refcount to it; or
* null if there is no such transceiver. The caller is responsible for
@@ -25,45 +25,45 @@ static struct usb_phy *xceiv;
*
* For use by USB host and peripheral drivers.
*/
-struct usb_phy *otg_get_transceiver(void)
+struct usb_phy *usb_get_transceiver(void)
{
if (xceiv)
get_device(xceiv->dev);
return xceiv;
}
-EXPORT_SYMBOL(otg_get_transceiver);
+EXPORT_SYMBOL(usb_get_transceiver);

/**
- * otg_put_transceiver - release the (single) OTG transceiver
+ * usb_put_transceiver - release the (single) OTG transceiver
* @x: the transceiver returned by otg_get_transceiver()
*
* Releases a refcount the caller received from otg_get_transceiver().
*
* For use by USB host and peripheral drivers.
*/
-void otg_put_transceiver(struct usb_phy *x)
+void usb_put_transceiver(struct usb_phy *x)
{
if (x)
put_device(x->dev);
}
-EXPORT_SYMBOL(otg_put_transceiver);
+EXPORT_SYMBOL(usb_put_transceiver);

/**
- * otg_set_transceiver - declare the (single) OTG transceiver
+ * usb_set_transceiver - declare the (single) OTG transceiver
* @x: the USB OTG transceiver to be used; or NULL
*
* This call is exclusively for use by transceiver drivers, which
* coordinate the activities of drivers for host and peripheral
* controllers, and in some cases for VBUS current regulation.
*/
-int otg_set_transceiver(struct usb_phy *x)
+int usb_set_transceiver(struct usb_phy *x)
{
if (xceiv && x)
return -EBUSY;
xceiv = x;
return 0;
}
-EXPORT_SYMBOL(otg_set_transceiver);
+EXPORT_SYMBOL(usb_set_transceiver);

const char *usb_phy_state_string(enum usb_phy_state state)
{
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 926e04c..34dea9b 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -48,11 +48,36 @@ struct usb_phy;
/* for transceivers connected thru an ULPI interface, the user must
* provide access ops
*/
-struct otg_io_access_ops {
+struct usb_phy_io_ops {
int (*read)(struct usb_phy *x, u32 reg);
int (*write)(struct usb_phy *x, u32 val, u32 reg);
};

+struct usb_otg {
+ u8 default_a;
+
+ struct usb_phy *xceiv;
+ struct usb_bus *host;
+ struct usb_gadget *gadget;
+
+ /* bind/unbind the host controller */
+ int (*set_host)(struct usb_otg *otg, struct usb_bus *host);
+
+ /* bind/unbind the peripheral controller */
+ int (*set_peripheral)(struct usb_otg *otg,
+ struct usb_gadget *gadget);
+
+ /* effective for A-peripheral, ignored for B devices */
+ int (*set_vbus)(struct usb_otg *otg, bool enabled);
+
+ /* for B devices only: start session with A-Host */
+ int (*start_srp)(struct usb_otg *otg);
+
+ /* start or continue HNP role switch */
+ int (*start_hnp)(struct usb_otg *otg);
+
+};
+
/*
* the otg driver needs to interact with both device side and host side
* usb controllers. it decides which controller is active at a given
@@ -68,11 +93,13 @@ struct usb_phy {
enum usb_phy_state state;
enum usb_phy_events last_event;

+ struct usb_otg *otg;
+
struct usb_bus *host;
struct usb_gadget *gadget;

- struct otg_io_access_ops *io_ops;
- void __iomem *io_priv;
+ struct usb_phy_io_ops *io_ops;
+ void __iomem *io_priv;

/* for notification of usb_phy_events */
struct atomic_notifier_head notifier;
@@ -115,7 +142,7 @@ struct usb_phy {


/* for board-specific init logic */
-extern int otg_set_transceiver(struct usb_phy *);
+extern int usb_set_transceiver(struct usb_phy *);

#if defined(CONFIG_NOP_USB_XCEIV) || (defined(CONFIG_NOP_USB_XCEIV_MODULE) && defined(MODULE))
/* sometimes transceivers are accessed only through e.g. ULPI */
@@ -132,7 +159,7 @@ static inline void usb_nop_xceiv_unregister(void)
#endif

/* helpers for direct access thru low-level io interface */
-static inline int otg_io_read(struct usb_phy *x, u32 reg)
+static inline int usb_phy_io_read(struct usb_phy *x, u32 reg)
{
if (x->io_ops && x->io_ops->read)
return x->io_ops->read(x, reg);
@@ -140,7 +167,7 @@ static inline int otg_io_read(struct usb_phy *x, u32 reg)
return -EINVAL;
}

-static inline int otg_io_write(struct usb_phy *x, u32 val, u32 reg)
+static inline int usb_phy_io_write(struct usb_phy *x, u32 val, u32 reg)
{
if (x->io_ops && x->io_ops->write)
return x->io_ops->write(x, val, reg);
@@ -149,7 +176,7 @@ static inline int otg_io_write(struct usb_phy *x, u32 val, u32 reg)
}

static inline int
-otg_init(struct usb_phy *x)
+usb_phy_init(struct usb_phy *x)
{
if (x->init)
return x->init(x);
@@ -158,7 +185,7 @@ otg_init(struct usb_phy *x)
}

static inline void
-otg_shutdown(struct usb_phy *x)
+usb_phy_shutdown(struct usb_phy *x)
{
if (x->shutdown)
x->shutdown(x);
@@ -166,16 +193,16 @@ otg_shutdown(struct usb_phy *x)

/* for usb host and peripheral controller drivers */
#ifdef CONFIG_USB_OTG_UTILS
-extern struct usb_phy *otg_get_transceiver(void);
-extern void otg_put_transceiver(struct usb_phy *);
+extern struct usb_phy *usb_get_transceiver(void);
+extern void usb_put_transceiver(struct usb_phy *);
extern const char *usb_phy_state_string(enum usb_phy_state state);
#else
-static inline struct usb_phy *otg_get_transceiver(void)
+static inline struct usb_phy *usb_get_transceiver(void)
{
return NULL;
}

-static inline void otg_put_transceiver(struct usb_phy *x)
+static inline void usb_put_transceiver(struct usb_phy *x)
{
}

@@ -189,6 +216,9 @@ static inline const char *usb_phy_state_string(enum usb_phy_state state)
static inline int
otg_start_hnp(struct usb_phy *x)
{
+ if (x->otg && x->otg->start_hnp)
+ return x->otg->start_hnp(x->otg);
+
return x->start_hnp(x);
}

@@ -196,6 +226,9 @@ otg_start_hnp(struct usb_phy *x)
static inline int
otg_set_vbus(struct usb_phy *x, bool enabled)
{
+ if (x->otg && x->otg->set_vbus)
+ return x->otg->set_vbus(x->otg, enabled);
+
return x->set_vbus(x, enabled);
}

@@ -203,6 +236,9 @@ otg_set_vbus(struct usb_phy *x, bool enabled)
static inline int
otg_set_host(struct usb_phy *x, struct usb_bus *host)
{
+ if (x->otg && x->otg->set_host)
+ return x->otg->set_host(x->otg, host);
+
return x->set_host(x, host);
}

@@ -212,18 +248,23 @@ otg_set_host(struct usb_phy *x, struct usb_bus *host)
static inline int
otg_set_peripheral(struct usb_phy *x, struct usb_gadget *periph)
{
+ if (x->otg && x->otg->set_peripheral)
+ return x->otg->set_peripheral(x->otg, periph);
+
return x->set_peripheral(x, periph);
}

static inline int
-otg_set_power(struct usb_phy *x, unsigned mA)
+usb_phy_set_power(struct usb_phy *x, unsigned mA)
{
- return x->set_power(x, mA);
+ if (x && x->set_power)
+ return x->set_power(x, mA);
+ return 0;
}

/* Context: can sleep */
static inline int
-otg_set_suspend(struct usb_phy *x, int suspend)
+usb_phy_set_suspend(struct usb_phy *x, int suspend)
{
if (x->set_suspend != NULL)
return x->set_suspend(x, suspend);
@@ -234,18 +275,21 @@ otg_set_suspend(struct usb_phy *x, int suspend)
static inline int
otg_start_srp(struct usb_phy *x)
{
+ if (x->otg && x->otg->start_srp)
+ return x->otg->start_srp(x->otg);
+
return x->start_srp(x);
}

/* notifiers */
static inline int
-otg_register_notifier(struct usb_phy *x, struct notifier_block *nb)
+usb_register_notifier(struct usb_phy *x, struct notifier_block *nb)
{
return atomic_notifier_chain_register(&x->notifier, nb);
}

static inline void
-otg_unregister_notifier(struct usb_phy *x, struct notifier_block *nb)
+usb_unregister_notifier(struct usb_phy *x, struct notifier_block *nb)
{
atomic_notifier_chain_unregister(&x->notifier, nb);
}
@@ -253,4 +297,22 @@ otg_unregister_notifier(struct usb_phy *x, struct notifier_block *nb)
/* for OTG controller drivers (and maybe other stuff) */
extern int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num);

+/* Temporary aliases for transceiver functions */
+#define otg_set_transceiver(x) usb_set_transceiver(x)
+#define otg_get_transceiver() usb_get_transceiver()
+#define otg_put_transceiver(x) usb_put_transceiver(x)
+
+#define otg_io_read(x, a) usb_phy_io_read(x, a)
+#define otg_io_write(x, a, b) usb_phy_io_write(x, a, b)
+
+#define otg_init(x) usb_phy_init(x)
+#define otg_shutdown(x) usb_phy_shutdown(x)
+#define otg_set_power(x, a) usb_phy_set_power(x, a)
+#define otg_set_suspend(x, a) usb_phy_set_suspend(x, a)
+
+#define otg_register_notifier(x, a) usb_register_notifier(x, a)
+#define otg_unregister_notifier(x, a) usb_unregiser_notifier(x, a)
+
+#define otg_io_access_ops usb_phy_io_ops
+
#endif /* __LINUX_USB_OTG_H */
--
1.7.4.1


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