[PATCH v6 78/87] usb: gadget: fix up the last UDC drivers after the resync

[Anders Roxell <anders.roxell@linaro.org>]

Adapt at91_udc and atmel_usba_udc to the new gadget API. udc-core has its
own usb_gadget_register_driver() now, so drop the local ones.

That leaves vbus_is_present(), usba_udc_enable() and usba_udc_disable()
used only from usba_udc_start() and usba_udc_stop(), which are
DM_USB_GADGET only. Move them under the same guard.

Co-developed-by: Jerome Forissier <jerome.forissier@linaro.org>
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Co-developed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---
 drivers/usb/gadget/at91_udc.c       |  46 -------------
 drivers/usb/gadget/atmel_usba_udc.c | 102 ++++++++--------------------
 drivers/usb/gadget/epautoconf.c     |   2 -
 3 files changed, 28 insertions(+), 122 deletions(-)

diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index b3c780a4e35c..5b0c55d59c8d 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1435,52 +1435,6 @@ int dm_usb_gadget_handle_interrupts(struct udevice *dev)
 	return at91_udc_irq(udc);
 }
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
-{
-	struct at91_udc *udc = controller;
-	int ret;
-
-	if (!driver || !driver->bind || !driver->setup) {
-		printf("bad paramter\n");
-		return -EINVAL;
-	}
-
-	if (udc->driver) {
-		printf("UDC already has a gadget driver\n");
-		return -EBUSY;
-	}
-
-	at91_start(&udc->gadget, driver);
-
-	udc->driver = driver;
-
-	ret = driver->bind(&udc->gadget);
-	if (ret) {
-		pr_err("driver->bind() returned %d\n", ret);
-		udc->driver = NULL;
-	}
-
-	return ret;
-}
-
-int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
-{
-	struct at91_udc *udc = controller;
-
-	if (!driver || !driver->unbind || !driver->disconnect) {
-		pr_err("bad paramter\n");
-		return -EINVAL;
-	}
-
-	driver->disconnect(&udc->gadget);
-	driver->unbind(&udc->gadget);
-	udc->driver = NULL;
-
-	at91_stop(&udc->gadget);
-
-	return 0;
-}
-
 int at91_udc_probe(struct at91_udc_data *pdata)
 {
 	struct at91_udc	*udc;
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 0caf8b8b7b45..52900ad654cf 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -32,12 +32,6 @@ static int usba_udc_stop(struct usb_gadget *gadget);
 
 #include "atmel_usba_udc.h"
 
-static int vbus_is_present(struct usba_udc *udc)
-{
-	/* No Vbus detection: Assume always present */
-	return 1;
-}
-
 static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
 {
 	unsigned int transaction_len;
@@ -1169,32 +1163,6 @@ static int usba_udc_irq(struct usba_udc *udc)
 	return 0;
 }
 
-static int usba_udc_enable(struct usba_udc *udc)
-{
-	udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
-
-	udc->vbus_prev = 0;
-
-	/* If Vbus is present, enable the controller and wait for reset */
-	if (vbus_is_present(udc) && udc->vbus_prev == 0) {
-		usba_writel(udc, CTRL, USBA_ENABLE_MASK);
-		usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
-	}
-
-	return 0;
-}
-
-static int usba_udc_disable(struct usba_udc *udc)
-{
-	udc->gadget.speed = USB_SPEED_UNKNOWN;
-	reset_all_endpoints(udc);
-
-	/* This will also disable the DP pullup */
-	usba_writel(udc, CTRL, USBA_DISABLE_MASK);
-
-	return 0;
-}
-
 static struct usba_ep *usba_udc_pdata(struct usba_platform_data *pdata,
 				      struct usba_udc *udc)
 {
@@ -1255,69 +1223,55 @@ int dm_usb_gadget_handle_interrupts(struct udevice *dev)
 	return usba_udc_irq(udc);
 }
 
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+int usba_udc_probe(struct usba_platform_data *pdata)
 {
-	struct usba_udc *udc = &controller;
-	int ret;
-
-	if (!driver || !driver->bind || !driver->setup) {
-		log_err("bad parameter\n");
-		return -EINVAL;
-	}
+	struct usba_udc *udc;
 
-	if (udc->driver) {
-		log_err("UDC already has a gadget driver\n");
-		return -EBUSY;
-	}
+	udc = &controller;
 
-	usba_udc_enable(udc);
+	udc->usba_ep = usba_udc_pdata(pdata, udc);
 
-	udc->driver = driver;
+	return 0;
+}
 
-	ret = driver->bind(&udc->gadget);
-	if (ret) {
-		log_err("driver->bind() returned %d\n", ret);
-		udc->driver = NULL;
-	}
+#else /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
+struct usba_priv_data {
+	struct clk_bulk		clks;
+	struct usba_udc		udc;
+};
 
-	return ret;
+static int vbus_is_present(struct usba_udc *udc)
+{
+	/* No Vbus detection: Assume always present */
+	return 1;
 }
 
-int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+static int usba_udc_enable(struct usba_udc *udc)
 {
-	struct usba_udc *udc = &controller;
-
-	if (!driver || !driver->unbind || !driver->disconnect) {
-		log_err("bad parameter\n");
-		return -EINVAL;
-	}
+	udc->devstatus = 1 << USB_DEVICE_SELF_POWERED;
 
-	driver->disconnect(&udc->gadget);
-	driver->unbind(&udc->gadget);
-	udc->driver = NULL;
+	udc->vbus_prev = 0;
 
-	usba_udc_disable(udc);
+	/* If Vbus is present, enable the controller and wait for reset */
+	if (vbus_is_present(udc) && udc->vbus_prev == 0) {
+		usba_writel(udc, CTRL, USBA_ENABLE_MASK);
+		usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
+	}
 
 	return 0;
 }
 
-int usba_udc_probe(struct usba_platform_data *pdata)
+static int usba_udc_disable(struct usba_udc *udc)
 {
-	struct usba_udc *udc;
-
-	udc = &controller;
+	udc->gadget.speed = USB_SPEED_UNKNOWN;
+	reset_all_endpoints(udc);
 
-	udc->usba_ep = usba_udc_pdata(pdata, udc);
+	/* This will also disable the DP pullup */
+	usba_writel(udc, CTRL, USBA_DISABLE_MASK);
 
 	return 0;
 }
 
-#else /* !CONFIG_IS_ENABLED(DM_USB_GADGET) */
-struct usba_priv_data {
-	struct clk_bulk		clks;
-	struct usba_udc		udc;
-};
-
 static int usba_udc_start(struct usb_gadget *gadget,
 			  struct usb_gadget_driver *driver)
 {
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 4fbea9137240..5128d147c168 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -7,9 +7,7 @@
  */
 
 #include <linux/kernel.h>
-#include <linux/module.h>
 #include <linux/types.h>
-#include <linux/device.h>
 
 #include <linux/ctype.h>
 #include <linux/string.h>
-- 
2.53.0