Converting ecm subset to the new function interface requires converting
the USB subset's function code and its users.
This patch converts the f_subset.c to the new function interface.
The file is now compiled into a separate usb_f_subset.ko module.
The old function interface is provided by means of a preprocessor
conditional directives. After all users are converted, the old interface
can be removed.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/usb/gadget/Kconfig | 3 +
drivers/usb/gadget/Makefile | 2 +
drivers/usb/gadget/ether.c | 1 +
drivers/usb/gadget/f_subset.c | 110 +++++++++++++++++++++++++++++++++++------
drivers/usb/gadget/g_ffs.c | 1 +
drivers/usb/gadget/u_gether.h | 27 ++++++++++
6 files changed, 129 insertions(+), 15 deletions(-)
create mode 100644 drivers/usb/gadget/u_gether.h
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 039de79..8e950e2 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -575,6 +575,9 @@ config USB_F_EEM
config USB_F_ECM
tristate
+config USB_F_SUBSET
+ tristate
+
choice
tristate "USB Gadget Drivers"
default USB_ETH
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index dfaccf4..fc323c7 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -93,3 +93,5 @@ usb_f_eem-y := f_eem.o
obj-$(CONFIG_USB_F_EEM) += usb_f_eem.o
usb_f_ecm-y := f_ecm.o
obj-$(CONFIG_USB_F_ECM) += usb_f_ecm.o
+usb_f_ecm_subset-y := f_subset.o
+obj-$(CONFIG_USB_F_ECM) += usb_f_ecm_subset.o
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 52106e5..f02c91b 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -104,6 +104,7 @@ static inline bool has_rndis(void)
* the runtime footprint, and giving us at least some parts of what
* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
*/
+#define USB_FSUBSET_INCLUDED
#include "f_subset.c"
#ifdef USB_ETH_RNDIS
#include "f_rndis.c"
diff --git a/drivers/usb/gadget/f_subset.c b/drivers/usb/gadget/f_subset.c
index 185d6f5..f7b01c4 100644
--- a/drivers/usb/gadget/f_subset.c
+++ b/drivers/usb/gadget/f_subset.c
@@ -12,11 +12,12 @@
#include <linux/slab.h>
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/device.h>
#include <linux/etherdevice.h>
#include "u_ether.h"
-
+#include "u_gether.h"
/*
* This function packages a simple "CDC Subset" Ethernet port with no real
@@ -298,6 +299,22 @@ geth_bind(struct usb_configuration *c, struct usb_function *f)
int status;
struct usb_ep *ep;
+#ifndef USB_FSUBSET_INCLUDED
+ struct f_gether_opts *gether_opts;
+
+ gether_opts = container_of(f->fi, struct f_gether_opts, func_inst);
+ if (!gether_opts->ethaddr)
+ return -EINVAL;
+#endif
+ /* maybe allocate device-global string IDs */
+ if (geth_string_defs[0].id == 0) {
+ status = usb_string_ids_tab(c->cdev, geth_string_defs);
+ if (status < 0)
+ return status;
+ subset_data_intf.iInterface = geth_string_defs[0].id;
+ ether_desc.iMACAddress = geth_string_defs[1].id;
+ }
+
/* allocate instance-specific interface IDs */
status = usb_interface_id(c, f);
if (status < 0)
@@ -360,8 +377,10 @@ fail:
return status;
}
+#ifdef USB_FSUBSET_INCLUDED
+
static void
-geth_unbind(struct usb_configuration *c, struct usb_function *f)
+geth_old_unbind(struct usb_configuration *c, struct usb_function *f)
{
geth_string_defs[0].id = 0;
usb_free_all_descriptors(f);
@@ -386,18 +405,6 @@ int geth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
struct f_gether *geth;
int status;
- if (!ethaddr)
- return -EINVAL;
-
- /* maybe allocate device-global string IDs */
- if (geth_string_defs[0].id == 0) {
- status = usb_string_ids_tab(c->cdev, geth_string_defs);
- if (status < 0)
- return status;
- subset_data_intf.iInterface = geth_string_defs[0].id;
- ether_desc.iMACAddress = geth_string_defs[1].id;
- }
-
/* allocate and initialize one new instance */
geth = kzalloc(sizeof *geth, GFP_KERNEL);
if (!geth)
@@ -413,7 +420,7 @@ int geth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
geth->port.func.name = "cdc_subset";
geth->port.func.strings = geth_strings;
geth->port.func.bind = geth_bind;
- geth->port.func.unbind = geth_unbind;
+ geth->port.func.unbind = geth_old_unbind;
geth->port.func.set_alt = geth_set_alt;
geth->port.func.disable = geth_disable;
@@ -422,3 +429,76 @@ int geth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
kfree(geth);
return status;
}
+
+#else
+
+static void geth_free_inst(struct usb_function_instance *f)
+{
+ struct f_gether_opts *opts;
+
+ opts = container_of(f, struct f_gether_opts, func_inst);
+ kfree(opts);
+}
+
+static struct usb_function_instance *geth_alloc_inst(void)
+{
+ struct f_gether_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+
+ opts->func_inst.free_func_inst = geth_free_inst;
+
+ return &opts->func_inst;
+}
+
+static void geth_free(struct usb_function *f)
+{
+ struct f_gether *eth;
+
+ eth = func_to_geth(f);
+ kfree(eth);
+}
+
+static void geth_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ geth_string_defs[0].id = 0;
+ usb_free_all_descriptors(f);
+}
+
+struct usb_function *geth_alloc(struct usb_function_instance *fi)
+{
+ struct f_gether *geth;
+ struct f_gether_opts *opts;
+
+ /* allocate and initialize one new instance */
+ geth = kzalloc(sizeof(*geth), GFP_KERNEL);
+ if (!geth)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_gether_opts, func_inst);
+
+ /* export host's Ethernet address in CDC format */
+ snprintf(geth->ethaddr, sizeof(geth->ethaddr), "%pm", opts->ethaddr);
+ geth_string_defs[1].s = geth->ethaddr;
+
+ geth->port.ioport = opts->dev;
+ geth->port.cdc_filter = DEFAULT_FILTER;
+
+ geth->port.func.name = "cdc_subset";
+ geth->port.func.strings = geth_strings;
+ geth->port.func.bind = geth_bind;
+ geth->port.func.unbind = geth_unbind;
+ geth->port.func.set_alt = geth_set_alt;
+ geth->port.func.disable = geth_disable;
+ geth->port.func.free_func = geth_free;
+
+ return &geth->port.func;
+}
+
+DECLARE_USB_FUNCTION_INIT(geth, geth_alloc_inst, geth_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Brownell");
+
+#endif
diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
index 65a34f3..be6f2dd 100644
--- a/drivers/usb/gadget/g_ffs.c
+++ b/drivers/usb/gadget/g_ffs.c
@@ -29,6 +29,7 @@
# endif
# include "u_ecm.h"
+#define USB_FSUBSET_INCLUDED
# include "f_subset.c"
# ifdef USB_ETH_RNDIS
# include "f_rndis.c"
diff --git a/drivers/usb/gadget/u_gether.h b/drivers/usb/gadget/u_gether.h
new file mode 100644
index 0000000..06dd54e
--- /dev/null
+++ b/drivers/usb/gadget/u_gether.h
@@ -0,0 +1,27 @@
+/*
+ * u_gether.h
+ *
+ * Utility definitions for the subset function
+ *
+ * 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_GETHER_H
+#define U_GETHER_H
+
+#include <linux/usb/composite.h>
+
+struct f_gether_opts {
+ struct usb_function_instance func_inst;
+ u8 *ethaddr;
+ struct eth_dev *dev;
+};
+
+#endif /* U_GETHER_H */
--
1.7.0.4
--
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