All USB Ethernet functions will have very similar attributes in configfs.
This patch provides helper definitions to ease writing the functions and
reduce source code duplication.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/usb/gadget/f_ncm.c | 139 ++-------------------------
drivers/usb/gadget/u_ether_configfs.h | 164 +++++++++++++++++++++++++++++++++
2 files changed, 175 insertions(+), 128 deletions(-)
create mode 100644 drivers/usb/gadget/u_ether_configfs.h
diff --git a/drivers/usb/gadget/f_ncm.c b/drivers/usb/gadget/f_ncm.c
index 7411663..dbcd542 100644
--- a/drivers/usb/gadget/f_ncm.c
+++ b/drivers/usb/gadget/f_ncm.c
@@ -24,6 +24,7 @@
#include <linux/usb/cdc.h>
#include "u_ether.h"
+#include "u_ether_configfs.h"
#include "u_ncm.h"
/*
@@ -1298,138 +1299,20 @@ static inline struct f_ncm_opts *to_f_ncm_opts(struct config_item *item)
func_inst.group);
}
-CONFIGFS_ATTR_STRUCT(f_ncm_opts);
-CONFIGFS_ATTR_OPS(f_ncm_opts);
+/* f_ncm_item_ops */
+USB_ETHERNET_CONFIGFS_ITEM(ncm);
-static void ncm_attr_release(struct config_item *item)
-{
- struct f_ncm_opts *opts = to_f_ncm_opts(item);
-
- usb_put_function_instance(&opts->func_inst);
-}
-
-static struct configfs_item_operations ncm_item_ops = {
- .release = ncm_attr_release,
- .show_attribute = f_ncm_opts_attr_show,
- .store_attribute = f_ncm_opts_attr_store,
-};
-
-static ssize_t ncm_opts_dev_addr_show(struct f_ncm_opts *opts, char *page)
-{
- 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 ncm_opts_dev_addr_store(struct f_ncm_opts *opts,
- const char *page, size_t len)
-{
- 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;
-}
-
-static struct f_ncm_opts_attribute f_ncm_opts_dev_addr =
- __CONFIGFS_ATTR(dev_addr, S_IRUGO | S_IWUSR, ncm_opts_dev_addr_show,
- ncm_opts_dev_addr_store);
-
-static ssize_t ncm_opts_host_addr_show(struct f_ncm_opts *opts, char *page)
-{
- 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 ncm_opts_host_addr_store(struct f_ncm_opts *opts,
- const char *page, size_t len)
-{
- int ret;
+/* f_ncm_opts_dev_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(ncm);
- 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;
-}
-
-static struct f_ncm_opts_attribute f_ncm_opts_host_addr =
- __CONFIGFS_ATTR(host_addr, S_IRUGO | S_IWUSR, ncm_opts_host_addr_show,
- ncm_opts_host_addr_store);
-
-static ssize_t ncm_opts_qmult_show(struct f_ncm_opts *opts, char *page)
-{
- unsigned qmult;
-
- mutex_lock(&opts->lock);
- qmult = gether_get_qmult(opts->net);
- mutex_unlock(&opts->lock);
- return sprintf(page, "%d", qmult);
-}
-
-static ssize_t ncm_opts_qmult_store(struct f_ncm_opts *opts,
- const char *page, size_t len)
-{
- u8 val;
- int ret;
+/* f_ncm_opts_host_addr */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(ncm);
- 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;
-}
-
-static struct f_ncm_opts_attribute f_ncm_opts_qmult =
- __CONFIGFS_ATTR(qmult, S_IRUGO | S_IWUSR, ncm_opts_qmult_show,
- ncm_opts_qmult_store);
-
-static ssize_t ncm_opts_ifname_show(struct f_ncm_opts *opts, char *page)
-{
- int ret;
-
- mutex_lock(&opts->lock);
- ret = gether_get_ifname(opts->net, page, PAGE_SIZE);
- mutex_unlock(&opts->lock);
-
- return ret;
-}
+/* f_ncm_opts_qmult */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(ncm);
-static struct f_ncm_opts_attribute f_ncm_opts_ifname =
- __CONFIGFS_ATTR_RO(ifname, ncm_opts_ifname_show);
+/* f_ncm_opts_ifname */
+USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(ncm);
static struct configfs_attribute *ncm_attrs[] = {
&f_ncm_opts_dev_addr.attr,
diff --git a/drivers/usb/gadget/u_ether_configfs.h b/drivers/usb/gadget/u_ether_configfs.h
new file mode 100644
index 0000000..bcbd301
--- /dev/null
+++ b/drivers/usb/gadget/u_ether_configfs.h
@@ -0,0 +1,164 @@
+/*
+ * 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 <andrzej.p@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __U_ETHER_CONFIGFS_H
+#define __U_ETHER_CONFIGFS_H
+
+#define USB_ETHERNET_CONFIGFS_ITEM(_f_) \
+ CONFIGFS_ATTR_STRUCT(f_##_f_##_opts); \
+ CONFIGFS_ATTR_OPS(f_##_f_##_opts); \
+ \
+ 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, \
+ .show_attribute = f_##_f_##_opts_attr_show, \
+ .store_attribute = f_##_f_##_opts_attr_store, \
+ }
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(_f_) \
+ static ssize_t _f_##_opts_dev_addr_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ 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 f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ 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; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_dev_addr = \
+ __CONFIGFS_ATTR(dev_addr, S_IRUGO | S_IWUSR, \
+ _f_##_opts_dev_addr_show, \
+ _f_##_opts_dev_addr_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(_f_) \
+ static ssize_t _f_##_opts_host_addr_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ 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 f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ 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; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_host_addr = \
+ __CONFIGFS_ATTR(host_addr, S_IRUGO | S_IWUSR, \
+ _f_##_opts_host_addr_show, \
+ _f_##_opts_host_addr_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(_f_) \
+ static ssize_t _f_##_opts_qmult_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ unsigned qmult; \
+ \
+ mutex_lock(&opts->lock); \
+ qmult = gether_get_qmult(opts->net); \
+ mutex_unlock(&opts->lock); \
+ return sprintf(page, "%d", qmult); \
+ } \
+ \
+ static ssize_t _f_##_opts_qmult_store(struct f_##_f_##_opts *opts, \
+ const char *page, size_t len)\
+ { \
+ 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; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_qmult = \
+ __CONFIGFS_ATTR(qmult, S_IRUGO | S_IWUSR, \
+ _f_##_opts_qmult_show, \
+ _f_##_opts_qmult_store)
+
+#define USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(_f_) \
+ static ssize_t _f_##_opts_ifname_show(struct f_##_f_##_opts *opts, \
+ char *page) \
+ { \
+ int ret; \
+ \
+ mutex_lock(&opts->lock); \
+ ret = gether_get_ifname(opts->net, page, PAGE_SIZE); \
+ mutex_unlock(&opts->lock); \
+ \
+ return ret; \
+ } \
+ \
+ static struct f_##_f_##_opts_attribute f_##_f_##_opts_ifname = \
+ __CONFIGFS_ATTR_RO(ifname, _f_##_opts_ifname_show)
+
+#endif /* __U_ETHER_CONFIGFS_H */
--
1.7.0.4
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