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authorAngelos Mouzakitis <a.mouzakitis@virtualopensystems.com>2023-10-10 14:33:42 +0000
committerAngelos Mouzakitis <a.mouzakitis@virtualopensystems.com>2023-10-10 14:33:42 +0000
commitaf1a266670d040d2f4083ff309d732d648afba2a (patch)
tree2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/drivers/usb/gadget/udc
parente02cda008591317b1625707ff8e115a4841aa889 (diff)
Add submodule dependency filesHEADmaster
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/drivers/usb/gadget/udc')
-rw-r--r--roms/u-boot/drivers/usb/gadget/udc/Makefile10
-rw-r--r--roms/u-boot/drivers/usb/gadget/udc/udc-core.c379
-rw-r--r--roms/u-boot/drivers/usb/gadget/udc/udc-uclass.c64
3 files changed, 453 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/usb/gadget/udc/Makefile b/roms/u-boot/drivers/usb/gadget/udc/Makefile
new file mode 100644
index 000000000..95dbf0c82
--- /dev/null
+++ b/roms/u-boot/drivers/usb/gadget/udc/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# USB peripheral controller drivers
+
+ifndef CONFIG_$(SPL_)DM_USB_GADGET
+obj-$(CONFIG_USB_DWC3_GADGET) += udc-core.o
+endif
+
+obj-$(CONFIG_$(SPL_)DM_USB_GADGET) += udc-core.o
+obj-$(CONFIG_$(SPL_)DM) += udc-uclass.o
diff --git a/roms/u-boot/drivers/usb/gadget/udc/udc-core.c b/roms/u-boot/drivers/usb/gadget/udc/udc-core.c
new file mode 100644
index 000000000..7f73926cb
--- /dev/null
+++ b/roms/u-boot/drivers/usb/gadget/udc/udc-core.c
@@ -0,0 +1,379 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * udc-core.c - Core UDC Framework
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * Taken from Linux Kernel v3.19-rc1 (drivers/usb/gadget/udc-core.c) and ported
+ * to uboot.
+ *
+ * commit 02e8c96627 : usb: gadget: udc: core: prepend udc_attach_driver with
+ * usb_
+ */
+
+#include <dm/device_compat.h>
+#include <dm/devres.h>
+#include <linux/compat.h>
+#include <malloc.h>
+#include <asm/cache.h>
+#include <linux/dma-mapping.h>
+#include <common.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+/**
+ * struct usb_udc - describes one usb device controller
+ * @driver - the gadget driver pointer. For use by the class code
+ * @dev - the child device to the actual controller
+ * @gadget - the gadget. For use by the class code
+ * @list - for use by the udc class driver
+ *
+ * This represents the internal data structure which is used by the UDC-class
+ * to hold information about udc driver and gadget together.
+ */
+struct usb_udc {
+ struct usb_gadget_driver *driver;
+ struct usb_gadget *gadget;
+ struct device dev;
+ struct list_head list;
+};
+
+static struct class *udc_class;
+static LIST_HEAD(udc_list);
+DEFINE_MUTEX(udc_lock);
+
+/* ------------------------------------------------------------------------- */
+
+int usb_gadget_map_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in)
+{
+ if (req->length == 0)
+ return 0;
+
+ req->dma = dma_map_single(req->buf, req->length,
+ is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_map_request);
+
+void usb_gadget_unmap_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in)
+{
+ if (req->length == 0)
+ return;
+
+ dma_unmap_single(req->dma, req->length,
+ is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);
+
+/* ------------------------------------------------------------------------- */
+
+/**
+ * usb_gadget_giveback_request - give the request back to the gadget layer
+ * Context: in_interrupt()
+ *
+ * This is called by device controller drivers in order to return the
+ * completed request back to the gadget layer.
+ */
+void usb_gadget_giveback_request(struct usb_ep *ep,
+ struct usb_request *req)
+{
+ req->complete(ep, req);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_giveback_request);
+
+/* ------------------------------------------------------------------------- */
+
+void usb_gadget_set_state(struct usb_gadget *gadget,
+ enum usb_device_state state)
+{
+ gadget->state = state;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_set_state);
+
+/* ------------------------------------------------------------------------- */
+
+/**
+ * usb_gadget_udc_reset - notifies the udc core that bus reset occurs
+ * @gadget: The gadget which bus reset occurs
+ * @driver: The gadget driver we want to notify
+ *
+ * If the udc driver has bus reset handler, it needs to call this when the bus
+ * reset occurs, it notifies the gadget driver that the bus reset occurs as
+ * well as updates gadget state.
+ */
+void usb_gadget_udc_reset(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
+{
+ driver->reset(gadget);
+ usb_gadget_set_state(gadget, USB_STATE_DEFAULT);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_udc_reset);
+
+/**
+ * usb_gadget_udc_start - tells usb device controller to start up
+ * @udc: The UDC to be started
+ *
+ * This call is issued by the UDC Class driver when it's about
+ * to register a gadget driver to the device controller, before
+ * calling gadget driver's bind() method.
+ *
+ * It allows the controller to be powered off until strictly
+ * necessary to have it powered on.
+ *
+ * Returns zero on success, else negative errno.
+ */
+static inline int usb_gadget_udc_start(struct usb_udc *udc)
+{
+ return udc->gadget->ops->udc_start(udc->gadget, udc->driver);
+}
+
+/**
+ * usb_gadget_udc_stop - tells usb device controller we don't need it anymore
+ * @gadget: The device we want to stop activity
+ * @driver: The driver to unbind from @gadget
+ *
+ * This call is issued by the UDC Class driver after calling
+ * gadget driver's unbind() method.
+ *
+ * The details are implementation specific, but it can go as
+ * far as powering off UDC completely and disable its data
+ * line pullups.
+ */
+static inline void usb_gadget_udc_stop(struct usb_udc *udc)
+{
+ udc->gadget->ops->udc_stop(udc->gadget);
+}
+
+/**
+ * usb_udc_release - release the usb_udc struct
+ * @dev: the dev member within usb_udc
+ *
+ * This is called by driver's core in order to free memory once the last
+ * reference is released.
+ */
+static void usb_udc_release(struct device *dev)
+{
+ struct usb_udc *udc;
+
+ udc = container_of(dev, struct usb_udc, dev);
+ kfree(udc);
+}
+
+/**
+ * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list
+ * @parent: the parent device to this udc. Usually the controller driver's
+ * device.
+ * @gadget: the gadget to be added to the list.
+ * @release: a gadget release function.
+ *
+ * Returns zero on success, negative errno otherwise.
+ */
+int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget,
+ void (*release)(struct device *dev))
+{
+ struct usb_udc *udc;
+ int ret = -ENOMEM;
+
+ udc = kzalloc(sizeof(*udc), GFP_KERNEL);
+ if (!udc)
+ goto err1;
+
+ dev_set_name(&gadget->dev, "gadget");
+ gadget->dev.parent = parent;
+
+ udc->dev.release = usb_udc_release;
+ udc->dev.class = udc_class;
+ udc->dev.parent = parent;
+
+ udc->gadget = gadget;
+
+ mutex_lock(&udc_lock);
+ list_add_tail(&udc->list, &udc_list);
+
+ usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED);
+
+ mutex_unlock(&udc_lock);
+
+ return 0;
+
+err1:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_add_gadget_udc_release);
+
+/**
+ * usb_add_gadget_udc - adds a new gadget to the udc class driver list
+ * @parent: the parent device to this udc. Usually the controller
+ * driver's device.
+ * @gadget: the gadget to be added to the list
+ *
+ * Returns zero on success, negative errno otherwise.
+ */
+int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget)
+{
+ return usb_add_gadget_udc_release(parent, gadget, NULL);
+}
+EXPORT_SYMBOL_GPL(usb_add_gadget_udc);
+
+static void usb_gadget_remove_driver(struct usb_udc *udc)
+{
+ dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n",
+ udc->driver->function);
+
+ usb_gadget_disconnect(udc->gadget);
+ udc->driver->disconnect(udc->gadget);
+ udc->driver->unbind(udc->gadget);
+ usb_gadget_udc_stop(udc);
+
+ udc->driver = NULL;
+}
+
+/**
+ * usb_del_gadget_udc - deletes @udc from udc_list
+ * @gadget: the gadget to be removed.
+ *
+ * This, will call usb_gadget_unregister_driver() if
+ * the @udc is still busy.
+ */
+void usb_del_gadget_udc(struct usb_gadget *gadget)
+{
+ struct usb_udc *udc = NULL;
+
+ mutex_lock(&udc_lock);
+ list_for_each_entry(udc, &udc_list, list)
+ if (udc->gadget == gadget)
+ goto found;
+
+ dev_err(gadget->dev.parent, "gadget not registered.\n");
+ mutex_unlock(&udc_lock);
+
+ return;
+
+found:
+ dev_vdbg(gadget->dev.parent, "unregistering gadget\n");
+
+ list_del(&udc->list);
+ mutex_unlock(&udc_lock);
+
+ if (udc->driver)
+ usb_gadget_remove_driver(udc);
+}
+EXPORT_SYMBOL_GPL(usb_del_gadget_udc);
+
+/* ------------------------------------------------------------------------- */
+
+/**
+ * usb_gadget_udc_set_speed - tells usb device controller speed supported by
+ * current driver
+ * @udc: The device we want to set maximum speed
+ * @speed: The maximum speed to allowed to run
+ *
+ * This call is issued by the UDC Class driver before calling
+ * usb_gadget_udc_start() in order to make sure that we don't try to
+ * connect on speeds the gadget driver doesn't support.
+ */
+static inline void usb_gadget_udc_set_speed(struct usb_udc *udc,
+ enum usb_device_speed speed)
+{
+ if (udc->gadget->ops->udc_set_speed) {
+ enum usb_device_speed s;
+
+ s = min(speed, udc->gadget->max_speed);
+ udc->gadget->ops->udc_set_speed(udc->gadget, s);
+ }
+}
+
+static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *driver)
+{
+ int ret;
+
+ dev_dbg(&udc->dev, "registering UDC driver [%s]\n",
+ driver->function);
+
+ udc->driver = driver;
+
+ usb_gadget_udc_set_speed(udc, driver->speed);
+
+ ret = driver->bind(udc->gadget);
+ if (ret)
+ goto err1;
+ ret = usb_gadget_udc_start(udc);
+ if (ret) {
+ driver->unbind(udc->gadget);
+ goto err1;
+ }
+ usb_gadget_connect(udc->gadget);
+
+ return 0;
+err1:
+ if (ret != -EISNAM)
+ dev_err(&udc->dev, "failed to start %s: %d\n",
+ udc->driver->function, ret);
+ udc->driver = NULL;
+ return ret;
+}
+
+int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
+{
+ struct usb_udc *udc = NULL;
+ int ret;
+
+ if (!driver || !driver->bind || !driver->setup)
+ return -EINVAL;
+
+ mutex_lock(&udc_lock);
+ list_for_each_entry(udc, &udc_list, list) {
+ /* For now we take the first one */
+ if (!udc->driver)
+ goto found;
+ }
+
+ printf("couldn't find an available UDC\n");
+ mutex_unlock(&udc_lock);
+ return -ENODEV;
+found:
+ ret = udc_bind_to_driver(udc, driver);
+ mutex_unlock(&udc_lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_probe_driver);
+
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+ return usb_gadget_probe_driver(driver);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_register_driver);
+
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+ struct usb_udc *udc = NULL;
+ int ret = -ENODEV;
+
+ if (!driver || !driver->unbind)
+ return -EINVAL;
+
+ mutex_lock(&udc_lock);
+ list_for_each_entry(udc, &udc_list, list)
+ if (udc->driver == driver) {
+ usb_gadget_remove_driver(udc);
+ usb_gadget_set_state(udc->gadget,
+ USB_STATE_NOTATTACHED);
+ ret = 0;
+ break;
+ }
+
+ mutex_unlock(&udc_lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver);
+
+MODULE_DESCRIPTION("UDC Framework");
+MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/roms/u-boot/drivers/usb/gadget/udc/udc-uclass.c b/roms/u-boot/drivers/usb/gadget/udc/udc-uclass.c
new file mode 100644
index 000000000..dbc354e84
--- /dev/null
+++ b/roms/u-boot/drivers/usb/gadget/udc/udc-uclass.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
+ * Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <linux/usb/gadget.h>
+
+#if CONFIG_IS_ENABLED(DM_USB_GADGET)
+#define MAX_UDC_DEVICES 4
+static struct udevice *dev_array[MAX_UDC_DEVICES];
+int usb_gadget_initialize(int index)
+{
+ int ret;
+ struct udevice *dev = NULL;
+
+ if (index < 0 || index >= ARRAY_SIZE(dev_array))
+ return -EINVAL;
+ if (dev_array[index])
+ return 0;
+ ret = uclass_get_device_by_seq(UCLASS_USB_GADGET_GENERIC, index, &dev);
+ if (!dev || ret) {
+ ret = uclass_get_device(UCLASS_USB_GADGET_GENERIC, index, &dev);
+ if (!dev || ret) {
+ pr_err("No USB device found\n");
+ return -ENODEV;
+ }
+ }
+ dev_array[index] = dev;
+ return 0;
+}
+
+int usb_gadget_release(int index)
+{
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
+ int ret;
+ if (index < 0 || index >= ARRAY_SIZE(dev_array))
+ return -EINVAL;
+
+ ret = device_remove(dev_array[index], DM_REMOVE_NORMAL);
+ if (!ret)
+ dev_array[index] = NULL;
+ return ret;
+#else
+ return -ENOSYS;
+#endif
+}
+
+int usb_gadget_handle_interrupts(int index)
+{
+ if (index < 0 || index >= ARRAY_SIZE(dev_array))
+ return -EINVAL;
+ return dm_usb_gadget_handle_interrupts(dev_array[index]);
+}
+#endif
+
+UCLASS_DRIVER(usb_gadget_generic) = {
+ .id = UCLASS_USB_GADGET_GENERIC,
+ .name = "usb",
+ .flags = DM_UC_FLAG_SEQ_ALIAS,
+};