diff options
Diffstat (limited to 'drivers/usb/gadget/function/u_ether_configfs.h')
| -rw-r--r-- | drivers/usb/gadget/function/u_ether_configfs.h | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/u_ether_configfs.h b/drivers/usb/gadget/function/u_ether_configfs.h new file mode 100644 index 000000000..f558c3139 --- /dev/null +++ b/drivers/usb/gadget/function/u_ether_configfs.h @@ -0,0 +1,200 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * u_ether_configfs.h + * + * Utility definitions for configfs support in USB Ethernet functions + * + * Copyright (c) 2013 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Author: Andrzej Pietrasiewicz <andrzejtp2010@gmail.com> + */ + +#ifndef __U_ETHER_CONFIGFS_H +#define __U_ETHER_CONFIGFS_H + +#define USB_ETHERNET_CONFIGFS_ITEM(_f_) \ + static void _f_##_attr_release(struct config_item *item) \ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + \ + usb_put_function_instance(&opts->func_inst); \ + } \ + \ + static struct configfs_item_operations _f_##_item_ops = { \ + .release = _f_##_attr_release, \ + } + +#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \ + static ssize_t _f_##_opts_dev_addr_show(struct config_item *item, \ + char *page) \ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + int result; \ + \ + mutex_lock(&opts->lock); \ + result = gether_get_dev_addr(opts->net, page, PAGE_SIZE); \ + mutex_unlock(&opts->lock); \ + \ + return result; \ + } \ + \ + static ssize_t _f_##_opts_dev_addr_store(struct config_item *item, \ + const char *page, size_t len)\ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + int ret; \ + \ + mutex_lock(&opts->lock); \ + if (opts->refcnt) { \ + mutex_unlock(&opts->lock); \ + return -EBUSY; \ + } \ + \ + ret = gether_set_dev_addr(opts->net, page); \ + mutex_unlock(&opts->lock); \ + if (!ret) \ + ret = len; \ + return ret; \ + } \ + \ + CONFIGFS_ATTR(_f_##_opts_, dev_addr) + +#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \ + static ssize_t _f_##_opts_host_addr_show(struct config_item *item, \ + char *page) \ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + int result; \ + \ + mutex_lock(&opts->lock); \ + result = gether_get_host_addr(opts->net, page, PAGE_SIZE); \ + mutex_unlock(&opts->lock); \ + \ + return result; \ + } \ + \ + static ssize_t _f_##_opts_host_addr_store(struct config_item *item, \ + const char *page, size_t len)\ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + int ret; \ + \ + mutex_lock(&opts->lock); \ + if (opts->refcnt) { \ + mutex_unlock(&opts->lock); \ + return -EBUSY; \ + } \ + \ + ret = gether_set_host_addr(opts->net, page); \ + mutex_unlock(&opts->lock); \ + if (!ret) \ + ret = len; \ + return ret; \ + } \ + \ + CONFIGFS_ATTR(_f_##_opts_, host_addr) + +#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \ + static ssize_t _f_##_opts_qmult_show(struct config_item *item, \ + char *page) \ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + unsigned qmult; \ + \ + mutex_lock(&opts->lock); \ + qmult = gether_get_qmult(opts->net); \ + mutex_unlock(&opts->lock); \ + return sprintf(page, "%d\n", qmult); \ + } \ + \ + static ssize_t _f_##_opts_qmult_store(struct config_item *item, \ + const char *page, size_t len)\ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + u8 val; \ + int ret; \ + \ + mutex_lock(&opts->lock); \ + if (opts->refcnt) { \ + ret = -EBUSY; \ + goto out; \ + } \ + \ + ret = kstrtou8(page, 0, &val); \ + if (ret) \ + goto out; \ + \ + gether_set_qmult(opts->net, val); \ + ret = len; \ +out: \ + mutex_unlock(&opts->lock); \ + return ret; \ + } \ + \ + CONFIGFS_ATTR(_f_##_opts_, qmult) + +#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \ + static ssize_t _f_##_opts_ifname_show(struct config_item *item, \ + char *page) \ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + int ret; \ + \ + mutex_lock(&opts->lock); \ + ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \ + mutex_unlock(&opts->lock); \ + \ + return ret; \ + } \ + \ + static ssize_t _f_##_opts_ifname_store(struct config_item *item, \ + const char *page, size_t len)\ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + int ret = -EBUSY; \ + \ + mutex_lock(&opts->lock); \ + if (!opts->refcnt) \ + ret = gether_set_ifname(opts->net, page, len); \ + mutex_unlock(&opts->lock); \ + return ret ?: len; \ + } \ + \ + CONFIGFS_ATTR(_f_##_opts_, ifname) + +#define USB_ETHER_CONFIGFS_ITEM_ATTR_U8_RW(_f_, _n_) \ + static ssize_t _f_##_opts_##_n_##_show(struct config_item *item,\ + char *page) \ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + int ret; \ + \ + mutex_lock(&opts->lock); \ + ret = sprintf(page, "%02x\n", opts->_n_); \ + mutex_unlock(&opts->lock); \ + \ + return ret; \ + } \ + \ + static ssize_t _f_##_opts_##_n_##_store(struct config_item *item,\ + const char *page, \ + size_t len) \ + { \ + struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \ + int ret = -EINVAL; \ + u8 val; \ + \ + mutex_lock(&opts->lock); \ + if (sscanf(page, "%02hhx", &val) > 0) { \ + opts->_n_ = val; \ + ret = len; \ + } \ + mutex_unlock(&opts->lock); \ + \ + return ret; \ + } \ + \ + CONFIGFS_ATTR(_f_##_opts_, _n_) + +#endif /* __U_ETHER_CONFIGFS_H */ |