[v2] usb: chipidea: Always build ULPI code

[v2] usb: chipidea: Always build ULPI code

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam@nxp.com>

Commit 03e6275ae381 ("usb: chipidea: Fix ULPI on imx51") causes a kernel
hang on imx51 systems that use the ULPI interface and do not select the
CONFIG_USB_CHIPIDEA_ULPI option.

In order to avoid such potential misuse, let's always build the
chipidea ULPI code into the final ci_hdrc object.

Tested on a imx51-babbage board.

Fixes: 03e6275ae381 ("usb: chipidea: Fix ULPI on imx51")
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
---
Changes since v1:
- Instead of warning when CONFIG_USB_CHIPIDEA_ULPI is not selected,
let the chipidea ULPI code always to be built-in. (Peter)

 drivers/usb/chipidea/Kconfig  | 9 +--------
 drivers/usb/chipidea/Makefile | 3 +--
 drivers/usb/chipidea/ci.h     | 8 --------
 drivers/usb/chipidea/ulpi.c   | 6 ++++++
 4 files changed, 8 insertions(+), 18 deletions(-)

diff --git a/drivers/usb/chipidea/Kconfig b/drivers/usb/chipidea/Kconfig
index 785f0ed..ee34e90 100644
--- a/drivers/usb/chipidea/Kconfig
+++ b/drivers/usb/chipidea/Kconfig
@@ -3,6 +3,7 @@ config USB_CHIPIDEA
 	depends on ((USB_EHCI_HCD && USB_GADGET) || (USB_EHCI_HCD && !USB_GADGET) || (!USB_EHCI_HCD && USB_GADGET)) && HAS_DMA
 	select EXTCON
 	select RESET_CONTROLLER
+	select USB_ULPI_BUS
 	help
 	  Say Y here if your system has a dual role high speed USB
 	  controller based on ChipIdea silicon IP. It supports:
@@ -38,12 +39,4 @@ config USB_CHIPIDEA_HOST
 	help
 	  Say Y here to enable host controller functionality of the
 	  ChipIdea driver.
-
-config USB_CHIPIDEA_ULPI
-	bool "ChipIdea ULPI PHY support"
-	depends on USB_ULPI_BUS=y || USB_ULPI_BUS=USB_CHIPIDEA
-	help
-	  Say Y here if you have a ULPI PHY attached to your ChipIdea
-	  controller.
-
 endif
diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
index e3d5e72..12df94f 100644
--- a/drivers/usb/chipidea/Makefile
+++ b/drivers/usb/chipidea/Makefile
@@ -1,11 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_USB_CHIPIDEA)		+= ci_hdrc.o
 
-ci_hdrc-y				:= core.o otg.o debug.o
+ci_hdrc-y				:= core.o otg.o debug.o ulpi.o
 ci_hdrc-$(CONFIG_USB_CHIPIDEA_UDC)	+= udc.o
 ci_hdrc-$(CONFIG_USB_CHIPIDEA_HOST)	+= host.o
 ci_hdrc-$(CONFIG_USB_OTG_FSM)		+= otg_fsm.o
-ci_hdrc-$(CONFIG_USB_CHIPIDEA_ULPI)	+= ulpi.o
 
 # Glue/Bridge layers go here
 
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index 0bf244d..6a2cc5c 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -240,10 +240,8 @@ struct ci_hdrc {
 
 	struct ci_hdrc_platform_data	*platdata;
 	int				vbus_active;
-#ifdef CONFIG_USB_CHIPIDEA_ULPI
 	struct ulpi			*ulpi;
 	struct ulpi_ops 		ulpi_ops;
-#endif
 	struct phy			*phy;
 	/* old usb_phy interface */
 	struct usb_phy			*usb_phy;
@@ -426,15 +424,9 @@ static inline bool ci_otg_is_fsm_mode(struct ci_hdrc *ci)
 #endif
 }
 
-#if IS_ENABLED(CONFIG_USB_CHIPIDEA_ULPI)
 int ci_ulpi_init(struct ci_hdrc *ci);
 void ci_ulpi_exit(struct ci_hdrc *ci);
 int ci_ulpi_resume(struct ci_hdrc *ci);
-#else
-static inline int ci_ulpi_init(struct ci_hdrc *ci) { return 0; }
-static inline void ci_ulpi_exit(struct ci_hdrc *ci) { }
-static inline int ci_ulpi_resume(struct ci_hdrc *ci) { return 0; }
-#endif
 
 u32 hw_read_intr_enable(struct ci_hdrc *ci);
 
diff --git a/drivers/usb/chipidea/ulpi.c b/drivers/usb/chipidea/ulpi.c
index 6da42dc..bf57f33 100644
--- a/drivers/usb/chipidea/ulpi.c
+++ b/drivers/usb/chipidea/ulpi.c
@@ -85,6 +85,9 @@ int ci_ulpi_init(struct ci_hdrc *ci)
 
 void ci_ulpi_exit(struct ci_hdrc *ci)
 {
+	if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI)
+		return;
+
 	if (ci->ulpi) {
 		ulpi_unregister_interface(ci->ulpi);
 		ci->ulpi = NULL;
@@ -95,6 +98,9 @@ int ci_ulpi_resume(struct ci_hdrc *ci)
 {
 	int cnt = 100000;
 
+	if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI)
+		return 0;
+
 	while (cnt-- > 0) {
 		if (hw_read(ci, OP_ULPI_VIEWPORT, ULPI_SYNC_STATE))
 			return 0;

[v2] usb: chipidea: Always build ULPI code

[Peter Chen]

> 
>  void ci_ulpi_exit(struct ci_hdrc *ci)
>  {
> +	if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI)
> +		return;
> +

Only above line is duplicated, others are ok, I will apply tomorrow, no need to
send v3.

Peter

>  	if (ci->ulpi) {
>  		ulpi_unregister_interface(ci->ulpi);
>  		ci->ulpi = NULL;
> @@ -95,6 +98,9 @@ int ci_ulpi_resume(struct ci_hdrc *ci)  {
>  	int cnt = 100000;
> 
> +	if (ci->platdata->phy_mode != USBPHY_INTERFACE_MODE_ULPI)
> +		return 0;
> +
>  	while (cnt-- > 0) {
>  		if (hw_read(ci, OP_ULPI_VIEWPORT, ULPI_SYNC_STATE))
>  			return 0;
> --
> 2.7.4
---
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html