[U-Boot] [PATCH v2 1/6] usb: dwc3: Add dwc3_init/remove with DM_USB

[Michal Simek]

From: Mugunthan V N <mugunthanvnm at ti.com>

The patch is preparing dwc3 core for enabling DM_USB with peripheral
driver with using driver model support.
The driver will be bound by the DWC3 wrapper driver based on the
dr_mode device tree entry.

Signed-off-by: Mugunthan V N <mugunthanvnm at ti.com>
(Remove dwc3-omap changes)
Signed-off-by: Michal Simek <michal.simek at xilinx.com>
---

Changes in v2:
- Retype dwc->dev in gadget.c to avoid compilation warning
- Guard udevice with __UBOOT__
- Move ifdef in core.c to avoid compilation issues for some platforms
  (for example edison)

Origin series here: https://patchwork.ozlabs.org/patch/775108/

- Fix labels as was asked in previous review.

---
 drivers/usb/dwc3/core.c   | 55 +++++++++++++++++++++++++++++++++++++++
 drivers/usb/dwc3/core.h   |  6 +++++
 drivers/usb/dwc3/gadget.c |  2 +-
 3 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index dbdad22d1134..1ab5cee60969 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -788,3 +788,58 @@ MODULE_ALIAS("platform:dwc3");
 MODULE_AUTHOR("Felipe Balbi <balbi at ti.com>");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
+
+#ifdef CONFIG_DM_USB
+
+int dwc3_init(struct dwc3 *dwc)
+{
+	int ret;
+
+	dwc3_cache_hwparams(dwc);
+
+	ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
+	if (ret) {
+		dev_err(dwc->dev, "failed to allocate event buffers\n");
+		return -ENOMEM;
+	}
+
+	ret = dwc3_core_init(dwc);
+	if (ret) {
+		dev_err(dev, "failed to initialize core\n");
+		goto core_fail;
+	}
+
+	ret = dwc3_event_buffers_setup(dwc);
+	if (ret) {
+		dev_err(dwc->dev, "failed to setup event buffers\n");
+		goto event_fail;
+	}
+
+	ret = dwc3_core_init_mode(dwc);
+	if (ret)
+		goto mode_fail;
+
+	return 0;
+
+mode_fail:
+	dwc3_event_buffers_cleanup(dwc);
+
+event_fail:
+	dwc3_core_exit(dwc);
+
+core_fail:
+	dwc3_free_event_buffers(dwc);
+
+	return ret;
+}
+
+void dwc3_remove(struct dwc3 *dwc)
+{
+	dwc3_core_exit_mode(dwc);
+	dwc3_event_buffers_cleanup(dwc);
+	dwc3_free_event_buffers(dwc);
+	dwc3_core_exit(dwc);
+	kfree(dwc->mem);
+}
+
+#endif
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index cbe9850a0bda..58fe91dc5131 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -712,7 +712,11 @@ struct dwc3 {
 	/* device lock */
 	spinlock_t		lock;
 
+#if defined(__UBOOT__) && defined(CONFIG_DM_USB)
+	struct udevice		*dev;
+#else
 	struct device		*dev;
+#endif
 
 	struct platform_device	*xhci;
 	struct resource		xhci_resources[DWC3_XHCI_RESOURCES_NUM];
@@ -987,6 +991,8 @@ struct dwc3_gadget_ep_cmd_params {
 
 /* prototypes */
 int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc);
+int dwc3_init(struct dwc3 *dwc);
+void dwc3_remove(struct dwc3 *dwc);
 
 #ifdef CONFIG_USB_DWC3_HOST
 int dwc3_host_init(struct dwc3 *dwc);
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index d45fae044c4a..e340cb268fcd 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2609,7 +2609,7 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 	if (ret)
 		goto err4;
 
-	ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget);
+	ret = usb_add_gadget_udc((struct device *)dwc->dev, &dwc->gadget);
 	if (ret) {
 		dev_err(dwc->dev, "failed to register udc\n");
 		goto err4;
-- 
2.17.0