Hi Kishon, > 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 <kis...@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 <ba...@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 <ba...@ti.com>"); > MODULE_LICENSE("GPL v2");
Reviewed-by: Lukasz Majewski <l.majew...@samsung.com> -- Best regards, Lukasz Majewski Samsung R&D Institute Poland (SRPOL) | Linux Platform Group _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
