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+/*
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+ * u_ether_configfs.h
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+ *
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+ * Utility definitions for configfs support in USB Ethernet functions
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+ *
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+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
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+ * http://www.samsung.com
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+ *
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+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#ifndef __U_ETHER_CONFIGFS_H
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+#define __U_ETHER_CONFIGFS_H
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+
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+#define USB_ETHERNET_CONFIGFS_ITEM(_f_) \
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+ CONFIGFS_ATTR_STRUCT(f_##_f_##_opts); \
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+ CONFIGFS_ATTR_OPS(f_##_f_##_opts); \
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+ \
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+ static void _f_##_attr_release(struct config_item *item) \
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+ { \
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+ struct f_##_f_##_opts *opts = to_f_##_f_##_opts(item); \
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+ \
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+ usb_put_function_instance(&opts->func_inst); \
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+ } \
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+ \
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+ static struct configfs_item_operations _f_##_item_ops = { \
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+ .release = _f_##_attr_release, \
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+ .show_attribute = f_##_f_##_opts_attr_show, \
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+ .store_attribute = f_##_f_##_opts_attr_store, \
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+ }
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+
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+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \
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+ static ssize_t _f_##_opts_dev_addr_show(struct f_##_f_##_opts *opts, \
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+ char *page) \
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+ { \
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+ int result; \
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+ \
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+ mutex_lock(&opts->lock); \
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+ result = gether_get_dev_addr(opts->net, page, PAGE_SIZE); \
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+ mutex_unlock(&opts->lock); \
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+ \
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+ return result; \
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+ } \
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+ \
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+ static ssize_t _f_##_opts_dev_addr_store(struct f_##_f_##_opts *opts, \
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+ const char *page, size_t len)\
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+ { \
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+ int ret; \
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+ \
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+ mutex_lock(&opts->lock); \
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+ if (opts->refcnt) { \
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+ mutex_unlock(&opts->lock); \
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+ return -EBUSY; \
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+ } \
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+ \
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+ ret = gether_set_dev_addr(opts->net, page); \
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+ mutex_unlock(&opts->lock); \
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+ if (!ret) \
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+ ret = len; \
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+ return ret; \
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+ } \
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+ \
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+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_dev_addr = \
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+ __CONFIGFS_ATTR(dev_addr, S_IRUGO | S_IWUSR, \
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+ _f_##_opts_dev_addr_show, \
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+ _f_##_opts_dev_addr_store)
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+
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+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \
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+ static ssize_t _f_##_opts_host_addr_show(struct f_##_f_##_opts *opts, \
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+ char *page) \
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+ { \
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+ int result; \
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+ \
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+ mutex_lock(&opts->lock); \
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+ result = gether_get_host_addr(opts->net, page, PAGE_SIZE); \
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+ mutex_unlock(&opts->lock); \
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+ \
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+ return result; \
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+ } \
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+ \
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+ static ssize_t _f_##_opts_host_addr_store(struct f_##_f_##_opts *opts, \
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+ const char *page, size_t len)\
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+ { \
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+ int ret; \
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+ \
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+ mutex_lock(&opts->lock); \
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+ if (opts->refcnt) { \
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+ mutex_unlock(&opts->lock); \
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+ return -EBUSY; \
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+ } \
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+ \
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+ ret = gether_set_host_addr(opts->net, page); \
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+ mutex_unlock(&opts->lock); \
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+ if (!ret) \
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+ ret = len; \
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+ return ret; \
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+ } \
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+ \
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+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_host_addr = \
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+ __CONFIGFS_ATTR(host_addr, S_IRUGO | S_IWUSR, \
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+ _f_##_opts_host_addr_show, \
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+ _f_##_opts_host_addr_store)
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+
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+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \
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+ static ssize_t _f_##_opts_qmult_show(struct f_##_f_##_opts *opts, \
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+ char *page) \
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+ { \
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+ unsigned qmult; \
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+ \
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+ mutex_lock(&opts->lock); \
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+ qmult = gether_get_qmult(opts->net); \
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+ mutex_unlock(&opts->lock); \
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+ return sprintf(page, "%d", qmult); \
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+ } \
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+ \
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+ static ssize_t _f_##_opts_qmult_store(struct f_##_f_##_opts *opts, \
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+ const char *page, size_t len)\
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+ { \
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+ u8 val; \
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+ int ret; \
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+ \
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+ mutex_lock(&opts->lock); \
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+ if (opts->refcnt) { \
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+ ret = -EBUSY; \
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+ goto out; \
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+ } \
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+ \
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+ ret = kstrtou8(page, 0, &val); \
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+ if (ret) \
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+ goto out; \
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+ \
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+ gether_set_qmult(opts->net, val); \
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+ ret = len; \
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+out: \
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+ mutex_unlock(&opts->lock); \
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+ return ret; \
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+ } \
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+ \
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+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_qmult = \
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+ __CONFIGFS_ATTR(qmult, S_IRUGO | S_IWUSR, \
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+ _f_##_opts_qmult_show, \
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+ _f_##_opts_qmult_store)
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+
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+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \
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+ static ssize_t _f_##_opts_ifname_show(struct f_##_f_##_opts *opts, \
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+ char *page) \
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+ { \
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+ int ret; \
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+ \
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+ mutex_lock(&opts->lock); \
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+ ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \
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+ mutex_unlock(&opts->lock); \
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+ \
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+ return ret; \
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+ } \
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+ \
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+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_ifname = \
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+ __CONFIGFS_ATTR_RO(ifname, _f_##_opts_ifname_show)
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+
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+#endif /* __U_ETHER_CONFIGFS_H */
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