[U-Boot] [u-boot 05/40] usb: gadget: udc: make udc-core compile in u-boot build

Kishon Vijay Abraham I
2015-02-06T08:47:42Z

Make udc-core compile in u-boot by removing all linux specific
stuff and having only the bare minimal udc-core required for
usb gadget drivers. Also modified the file header to a format that is
generally being used in u-boot.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/usb/gadget/udc/udc-core.c | 335 +++----------------------------------
1 file changed, 26 insertions(+), 309 deletions(-)

diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/udc-core.c
index e31d574..875e998 100644
--- a/drivers/usb/gadget/udc/udc-core.c
+++ b/drivers/usb/gadget/udc/udc-core.c
@@ -1,33 +1,27 @@
/**
- * udc.c - Core UDC Framework
+ * udc-core.c - Core UDC Framework
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com
*
- * Copyright (C) 2010 Texas Instruments
* Author: Felipe Balbi <balbi@ti.com>
*
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 of
- * the License as published by the Free Software Foundation.
+ * Taken from Linux Kernel v3.19-rc1 (drivers/usb/gadget/udc-core.c) and ported
+ * to uboot.
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * commit 02e8c96627 : usb: gadget: udc: core: prepend udc_attach_driver with
+ * usb_
*
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: GPL-2.0
*/

-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/list.h>
-#include <linux/err.h>
-#include <linux/dma-mapping.h>
-#include <linux/workqueue.h>
+#include <linux/compat.h>
+#include <malloc.h>
+#include <asm/cache.h>
+#include <asm/dma-mapping.h>
+#include <common.h>

#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
-#include <linux/usb.h>

/**
* struct usb_udc - describes one usb device controller
@@ -48,38 +42,18 @@ struct usb_udc {

static struct class *udc_class;
static LIST_HEAD(udc_list);
-static DEFINE_MUTEX(udc_lock);
+DEFINE_MUTEX(udc_lock);

/* ------------------------------------------------------------------------- */

-#ifdef CONFIG_HAS_DMA
-
int usb_gadget_map_request(struct usb_gadget *gadget,
struct usb_request *req, int is_in)
{
if (req->length == 0)
return 0;

- if (req->num_sgs) {
- int mapped;
-
- mapped = dma_map_sg(&gadget->dev, req->sg, req->num_sgs,
- is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- if (mapped == 0) {
- dev_err(&gadget->dev, "failed to map SGs\n");
- return -EFAULT;
- }
-
- req->num_mapped_sgs = mapped;
- } else {
- req->dma = dma_map_single(&gadget->dev, req->buf, req->length,
- is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-
- if (dma_mapping_error(&gadget->dev, req->dma)) {
- dev_err(&gadget->dev, "failed to map buffer\n");
- return -EFAULT;
- }
- }
+ req->dma = dma_map_single(req->buf, req->length,
+ is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);

return 0;
}
@@ -91,20 +65,11 @@ void usb_gadget_unmap_request(struct usb_gadget *gadget,
if (req->length == 0)
return;

- if (req->num_mapped_sgs) {
- dma_unmap_sg(&gadget->dev, req->sg, req->num_mapped_sgs,
- is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
-
- req->num_mapped_sgs = 0;
- } else {
- dma_unmap_single(&gadget->dev, req->dma, req->length,
- is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- }
+ dma_unmap_single((void *)req->dma, req->length,
+ is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
}
EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);

-#endif /* CONFIG_HAS_DMA */
-
/* ------------------------------------------------------------------------- */

/**
@@ -117,39 +82,16 @@ EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);
void usb_gadget_giveback_request(struct usb_ep *ep,
struct usb_request *req)
{
- if (likely(req->status == 0))
- usb_led_activity(USB_LED_EVENT_GADGET);
-
req->complete(ep, req);
}
EXPORT_SYMBOL_GPL(usb_gadget_giveback_request);

/* ------------------------------------------------------------------------- */

-static void usb_gadget_state_work(struct work_struct *work)
-{
- struct usb_gadget *gadget = work_to_gadget(work);
- struct usb_udc *udc = NULL;
-
- mutex_lock(&udc_lock);
- list_for_each_entry(udc, &udc_list, list)
- if (udc->gadget == gadget)
- goto found;
- mutex_unlock(&udc_lock);
-
- return;
-
-found:
- mutex_unlock(&udc_lock);
-
- sysfs_notify(&udc->dev.kobj, NULL, "state");
-}
-
void usb_gadget_set_state(struct usb_gadget *gadget,
enum usb_device_state state)
{
gadget->state = state;
- schedule_work(&gadget->work);
}
EXPORT_SYMBOL_GPL(usb_gadget_set_state);

@@ -219,17 +161,9 @@ static void usb_udc_release(struct device *dev)
struct usb_udc *udc;

udc = container_of(dev, struct usb_udc, dev);
- dev_dbg(dev, "releasing '%s'\n", dev_name(dev));
kfree(udc);
}

-static const struct attribute_group *usb_udc_attr_groups[];
-
-static void usb_udc_nop_release(struct device *dev)
-{
- dev_vdbg(dev, "%s\n", __func__);
-}
-
/**
* 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
@@ -250,59 +184,23 @@ int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget *gadget,
goto err1;

dev_set_name(&gadget->dev, "gadget");
- INIT_WORK(&gadget->work, usb_gadget_state_work);
gadget->dev.parent = parent;

-#ifdef CONFIG_HAS_DMA
- dma_set_coherent_mask(&gadget->dev, parent->coherent_dma_mask);
- gadget->dev.dma_parms = parent->dma_parms;
- gadget->dev.dma_mask = parent->dma_mask;
-#endif
-
- if (release)
- gadget->dev.release = release;
- else
- gadget->dev.release = usb_udc_nop_release;
-
- ret = device_register(&gadget->dev);
- if (ret)
- goto err2;
-
- device_initialize(&udc->dev);
udc->dev.release = usb_udc_release;
udc->dev.class = udc_class;
- udc->dev.groups = usb_udc_attr_groups;
udc->dev.parent = parent;
- ret = dev_set_name(&udc->dev, "%s", kobject_name(&parent->kobj));
- if (ret)
- goto err3;

udc->gadget = gadget;

mutex_lock(&udc_lock);
list_add_tail(&udc->list, &udc_list);

- ret = device_add(&udc->dev);
- if (ret)
- goto err4;
-
usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED);

mutex_unlock(&udc_lock);

return 0;

-err4:
- list_del(&udc->list);
- mutex_unlock(&udc_lock);
-
-err3:
- put_device(&udc->dev);
-
-err2:
- put_device(&gadget->dev);
- kfree(udc);
-
err1:
return ret;
}
@@ -327,16 +225,12 @@ static void usb_gadget_remove_driver(struct usb_udc *udc)
dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n",
udc->driver->function);

- kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
-
usb_gadget_disconnect(udc->gadget);
udc->driver->disconnect(udc->gadget);
udc->driver->unbind(udc->gadget);
usb_gadget_udc_stop(udc);

udc->driver = NULL;
- udc->dev.driver = NULL;
- udc->gadget->dev.driver = NULL;
}

/**
@@ -368,11 +262,6 @@ found:

if (udc->driver)
usb_gadget_remove_driver(udc);
-
- kobject_uevent(&udc->dev.kobj, KOBJ_REMOVE);
- flush_work(&gadget->work);
- device_unregister(&udc->dev);
- device_unregister(&gadget->dev);
}
EXPORT_SYMBOL_GPL(usb_del_gadget_udc);

@@ -386,10 +275,8 @@ static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *dri
driver->function);

udc->driver = driver;
- udc->dev.driver = &driver->driver;
- udc->gadget->dev.driver = &driver->driver;

- ret = driver->bind(udc->gadget, driver);
+ ret = driver->bind(udc->gadget);
if (ret)
goto err1;
ret = usb_gadget_udc_start(udc);
@@ -399,43 +286,14 @@ static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver *dri
}
usb_gadget_connect(udc->gadget);

- kobject_uevent(&udc->dev.kobj, KOBJ_CHANGE);
return 0;
err1:
if (ret != -EISNAM)
dev_err(&udc->dev, "failed to start %s: %d\n",
udc->driver->function, ret);
udc->driver = NULL;
- udc->dev.driver = NULL;
- udc->gadget->dev.driver = NULL;
- return ret;
-}
-
-int usb_udc_attach_driver(const char *name, struct usb_gadget_driver *driver)
-{
- struct usb_udc *udc = NULL;
- int ret = -ENODEV;
-
- mutex_lock(&udc_lock);
- list_for_each_entry(udc, &udc_list, list) {
- ret = strcmp(name, dev_name(&udc->dev));
- if (!ret)
- break;
- }
- if (ret) {
- ret = -ENODEV;
- goto out;
- }
- if (udc->driver) {
- ret = -EBUSY;
- goto out;
- }
- ret = udc_bind_to_driver(udc, driver);
-out:
- mutex_unlock(&udc_lock);
return ret;
}
-EXPORT_SYMBOL_GPL(usb_udc_attach_driver);

int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
{
@@ -452,7 +310,7 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
goto found;
}

- pr_debug("couldn't find an available UDC\n");
+ printf("couldn't find an available UDC\n");
mutex_unlock(&udc_lock);
return -ENODEV;
found:
@@ -462,6 +320,12 @@ found:
}
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;
@@ -485,153 +349,6 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
}
EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver);

-/* ------------------------------------------------------------------------- */
-
-static ssize_t usb_udc_srp_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t n)
-{
- struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
-
- if (sysfs_streq(buf, "1"))
- usb_gadget_wakeup(udc->gadget);
-
- return n;
-}
-static DEVICE_ATTR(srp, S_IWUSR, NULL, usb_udc_srp_store);
-
-static ssize_t usb_udc_softconn_store(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t n)
-{
- struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
-
- if (!udc->driver) {
- dev_err(dev, "soft-connect without a gadget driver\n");
- return -EOPNOTSUPP;
- }
-
- if (sysfs_streq(buf, "connect")) {
- usb_gadget_udc_start(udc);
- usb_gadget_connect(udc->gadget);
- } else if (sysfs_streq(buf, "disconnect")) {
- usb_gadget_disconnect(udc->gadget);
- udc->driver->disconnect(udc->gadget);
- usb_gadget_udc_stop(udc);
- } else {
- dev_err(dev, "unsupported command '%s'\n", buf);
- return -EINVAL;
- }
-
- return n;
-}
-static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store);
-
-static ssize_t state_show(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
- struct usb_gadget *gadget = udc->gadget;
-
- return sprintf(buf, "%s\n", usb_state_string(gadget->state));
-}
-static DEVICE_ATTR_RO(state);
-
-#define USB_UDC_SPEED_ATTR(name, param) \
-ssize_t name##_show(struct device *dev, \
- struct device_attribute *attr, char *buf) \
-{ \
- struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
- return snprintf(buf, PAGE_SIZE, "%s\n", \
- usb_speed_string(udc->gadget->param)); \
-} \
-static DEVICE_ATTR_RO(name)
-
-static USB_UDC_SPEED_ATTR(current_speed, speed);
-static USB_UDC_SPEED_ATTR(maximum_speed, max_speed);
-
-#define USB_UDC_ATTR(name) \
-ssize_t name##_show(struct device *dev, \
- struct device_attribute *attr, char *buf) \
-{ \
- struct usb_udc *udc = container_of(dev, struct usb_udc, dev); \
- struct usb_gadget *gadget = udc->gadget; \
- \
- return snprintf(buf, PAGE_SIZE, "%d\n", gadget->name); \
-} \
-static DEVICE_ATTR_RO(name)
-
-static USB_UDC_ATTR(is_otg);
-static USB_UDC_ATTR(is_a_peripheral);
-static USB_UDC_ATTR(b_hnp_enable);
-static USB_UDC_ATTR(a_hnp_support);
-static USB_UDC_ATTR(a_alt_hnp_support);
-
-static struct attribute *usb_udc_attrs[] = {
- &dev_attr_srp.attr,
- &dev_attr_soft_connect.attr,
- &dev_attr_state.attr,
- &dev_attr_current_speed.attr,
- &dev_attr_maximum_speed.attr,
-
- &dev_attr_is_otg.attr,
- &dev_attr_is_a_peripheral.attr,
- &dev_attr_b_hnp_enable.attr,
- &dev_attr_a_hnp_support.attr,
- &dev_attr_a_alt_hnp_support.attr,
- NULL,
-};
-
-static const struct attribute_group usb_udc_attr_group = {
- .attrs = usb_udc_attrs,
-};
-
-static const struct attribute_group *usb_udc_attr_groups[] = {
- &usb_udc_attr_group,
- NULL,
-};
-
-static int usb_udc_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
- int ret;
-
- ret = add_uevent_var(env, "USB_UDC_NAME=%s", udc->gadget->name);
- if (ret) {
- dev_err(dev, "failed to add uevent USB_UDC_NAME\n");
- return ret;
- }
-
- if (udc->driver) {
- ret = add_uevent_var(env, "USB_UDC_DRIVER=%s",
- udc->driver->function);
- if (ret) {
- dev_err(dev, "failed to add uevent USB_UDC_DRIVER\n");
- return ret;
- }
- }
-
- return 0;
-}
-
-static int __init usb_udc_init(void)
-{
- udc_class = class_create(THIS_MODULE, "udc");
- if (IS_ERR(udc_class)) {
- pr_err("failed to create udc class --> %ld\n",
- PTR_ERR(udc_class));
- return PTR_ERR(udc_class);
- }
-
- udc_class->dev_uevent = usb_udc_uevent;
- return 0;
-}
-subsys_initcall(usb_udc_init);
-
-static void __exit usb_udc_exit(void)
-{
- class_destroy(udc_class);
-}
-module_exit(usb_udc_exit);
-
MODULE_DESCRIPTION("UDC Framework");
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("GPL v2");
--
1.7.9.5