Converting ncm to the new function interface requires converting
the USB ncm's function code and its users.
This patch converts the f_ncm.c to the new function interface.
The file is now compiled into a separate usb_f_ncm.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/f_ncm.c | 183 ++++++++++++++++++++++++++++++++++--------
drivers/usb/gadget/ncm.c | 1 +
drivers/usb/gadget/u_ncm.h | 26 ++++++
5 files changed, 180 insertions(+), 35 deletions(-)
create mode 100644 drivers/usb/gadget/u_ncm.h
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 84167fa..276b1ba 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -518,6 +518,9 @@ config USB_F_SERIAL
config USB_F_OBEX
tristate
+config USB_F_NCM
+ tristate
+
choice
tristate "USB Gadget Drivers"
default USB_ETH
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 7a0463e..34b117e 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -48,6 +48,8 @@ obj-$(CONFIG_USB_F_OBEX) += usb_f_obex.o
obj-$(CONFIG_USB_U_ETHER) += u_ether.o
u_rndis-y := rndis.o
obj-$(CONFIG_USB_U_RNDIS) += u_rndis.o
+usb_f_ncm-y := f_ncm.o
+obj-$(CONFIG_USB_F_NCM) += usb_f_ncm.o
#
# USB gadget drivers
diff --git a/drivers/usb/gadget/f_ncm.c b/drivers/usb/gadget/f_ncm.c
index ee19bc8..839d316 100644
--- a/drivers/usb/gadget/f_ncm.c
+++ b/drivers/usb/gadget/f_ncm.c
@@ -16,6 +16,7 @@
*/
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/device.h>
#include <linux/etherdevice.h>
#include <linux/crc32.h>
@@ -23,6 +24,7 @@
#include <linux/usb/cdc.h>
#include "u_ether.h"
+#include "u_ncm.h"
/*
* This function is a "CDC Network Control Model" (CDC NCM) Ethernet link.
@@ -125,7 +127,7 @@ static struct usb_cdc_ncm_ntb_parameters ntb_parameters = {
#define NCM_STATUS_INTERVAL_MS 32
#define NCM_STATUS_BYTECOUNT 16 /* 8 byte header + data */
-static struct usb_interface_assoc_descriptor ncm_iad_desc __initdata = {
+static struct usb_interface_assoc_descriptor ncm_iad_desc = {
.bLength = sizeof ncm_iad_desc,
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
@@ -139,7 +141,7 @@ static struct usb_interface_assoc_descriptor ncm_iad_desc __initdata = {
/* interface descriptor: */
-static struct usb_interface_descriptor ncm_control_intf __initdata = {
+static struct usb_interface_descriptor ncm_control_intf = {
.bLength = sizeof ncm_control_intf,
.bDescriptorType = USB_DT_INTERFACE,
@@ -151,7 +153,7 @@ static struct usb_interface_descriptor ncm_control_intf __initdata = {
/* .iInterface = DYNAMIC */
};
-static struct usb_cdc_header_desc ncm_header_desc __initdata = {
+static struct usb_cdc_header_desc ncm_header_desc = {
.bLength = sizeof ncm_header_desc,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubType = USB_CDC_HEADER_TYPE,
@@ -159,7 +161,7 @@ static struct usb_cdc_header_desc ncm_header_desc __initdata = {
.bcdCDC = cpu_to_le16(0x0110),
};
-static struct usb_cdc_union_desc ncm_union_desc __initdata = {
+static struct usb_cdc_union_desc ncm_union_desc = {
.bLength = sizeof(ncm_union_desc),
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubType = USB_CDC_UNION_TYPE,
@@ -167,7 +169,7 @@ static struct usb_cdc_union_desc ncm_union_desc __initdata = {
/* .bSlaveInterface0 = DYNAMIC */
};
-static struct usb_cdc_ether_desc ecm_desc __initdata = {
+static struct usb_cdc_ether_desc ecm_desc = {
.bLength = sizeof ecm_desc,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubType = USB_CDC_ETHERNET_TYPE,
@@ -182,7 +184,7 @@ static struct usb_cdc_ether_desc ecm_desc __initdata = {
#define NCAPS (USB_CDC_NCM_NCAP_ETH_FILTER | USB_CDC_NCM_NCAP_CRC_MODE)
-static struct usb_cdc_ncm_desc ncm_desc __initdata = {
+static struct usb_cdc_ncm_desc ncm_desc = {
.bLength = sizeof ncm_desc,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubType = USB_CDC_NCM_TYPE,
@@ -194,7 +196,7 @@ static struct usb_cdc_ncm_desc ncm_desc __initdata = {
/* the default data interface has no endpoints ... */
-static struct usb_interface_descriptor ncm_data_nop_intf __initdata = {
+static struct usb_interface_descriptor ncm_data_nop_intf = {
.bLength = sizeof ncm_data_nop_intf,
.bDescriptorType = USB_DT_INTERFACE,
@@ -209,7 +211,7 @@ static struct usb_interface_descriptor ncm_data_nop_intf __initdata = {
/* ... but the "real" data interface has two bulk endpoints */
-static struct usb_interface_descriptor ncm_data_intf __initdata = {
+static struct usb_interface_descriptor ncm_data_intf = {
.bLength = sizeof ncm_data_intf,
.bDescriptorType = USB_DT_INTERFACE,
@@ -224,7 +226,7 @@ static struct usb_interface_descriptor ncm_data_intf __initdata = {
/* full speed support: */
-static struct usb_endpoint_descriptor fs_ncm_notify_desc __initdata = {
+static struct usb_endpoint_descriptor fs_ncm_notify_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -234,7 +236,7 @@ static struct usb_endpoint_descriptor fs_ncm_notify_desc __initdata = {
.bInterval = NCM_STATUS_INTERVAL_MS,
};
-static struct usb_endpoint_descriptor fs_ncm_in_desc __initdata = {
+static struct usb_endpoint_descriptor fs_ncm_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -242,7 +244,7 @@ static struct usb_endpoint_descriptor fs_ncm_in_desc __initdata = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};
-static struct usb_endpoint_descriptor fs_ncm_out_desc __initdata = {
+static struct usb_endpoint_descriptor fs_ncm_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -250,7 +252,7 @@ static struct usb_endpoint_descriptor fs_ncm_out_desc __initdata = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};
-static struct usb_descriptor_header *ncm_fs_function[] __initdata = {
+static struct usb_descriptor_header *ncm_fs_function[] = {
(struct usb_descriptor_header *) &ncm_iad_desc,
/* CDC NCM control descriptors */
(struct usb_descriptor_header *) &ncm_control_intf,
@@ -269,7 +271,7 @@ static struct usb_descriptor_header *ncm_fs_function[] __initdata = {
/* high speed support: */
-static struct usb_endpoint_descriptor hs_ncm_notify_desc __initdata = {
+static struct usb_endpoint_descriptor hs_ncm_notify_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -278,7 +280,7 @@ static struct usb_endpoint_descriptor hs_ncm_notify_desc __initdata = {
.wMaxPacketSize = cpu_to_le16(NCM_STATUS_BYTECOUNT),
.bInterval = USB_MS_TO_HS_INTERVAL(NCM_STATUS_INTERVAL_MS),
};
-static struct usb_endpoint_descriptor hs_ncm_in_desc __initdata = {
+static struct usb_endpoint_descriptor hs_ncm_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -287,7 +289,7 @@ static struct usb_endpoint_descriptor hs_ncm_in_desc __initdata = {
.wMaxPacketSize = cpu_to_le16(512),
};
-static struct usb_endpoint_descriptor hs_ncm_out_desc __initdata = {
+static struct usb_endpoint_descriptor hs_ncm_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -296,7 +298,7 @@ static struct usb_endpoint_descriptor hs_ncm_out_desc __initdata = {
.wMaxPacketSize = cpu_to_le16(512),
};
-static struct usb_descriptor_header *ncm_hs_function[] __initdata = {
+static struct usb_descriptor_header *ncm_hs_function[] = {
(struct usb_descriptor_header *) &ncm_iad_desc,
/* CDC NCM control descriptors */
(struct usb_descriptor_header *) &ncm_control_intf,
@@ -1152,14 +1154,40 @@ static void ncm_close(struct gether *geth)
/* ethernet function driver setup/binding */
-static int __init
-ncm_bind(struct usb_configuration *c, struct usb_function *f)
+static int ncm_bind(struct usb_configuration *c, struct usb_function *f)
{
struct usb_composite_dev *cdev = c->cdev;
struct f_ncm *ncm = func_to_ncm(f);
int status;
struct usb_ep *ep;
+#ifndef USB_FNCM_INCLUDED
+ struct f_ncm_opts *ncm_opts;
+
+ if (!can_support_ecm(cdev->gadget))
+ return -EINVAL;
+
+ ncm_opts = container_of(f->fi, struct f_ncm_opts, func_inst);
+ gether_set_gadget(ncm_opts->net, cdev->gadget);
+ status = gether_register_netdev(ncm_opts->net);
+ if (status)
+ return status;
+#endif
+ if (ncm_string_defs[0].id == 0) {
+ status = usb_string_ids_tab(c->cdev, ncm_string_defs);
+ if (status < 0)
+ return status;
+ ncm_control_intf.iInterface =
+ ncm_string_defs[STRING_CTRL_IDX].id;
+
+ status = ncm_string_defs[STRING_DATA_IDX].id;
+ ncm_data_nop_intf.iInterface = status;
+ ncm_data_intf.iInterface = status;
+
+ ecm_desc.iMACAddress = ncm_string_defs[STRING_MAC_IDX].id;
+ ncm_iad_desc.iFunction = ncm_string_defs[STRING_IAD_IDX].id;
+ }
+
/* allocate instance-specific interface IDs */
status = usb_interface_id(c, f);
if (status < 0)
@@ -1259,8 +1287,10 @@ fail:
return status;
}
+#ifdef USB_FNCM_INCLUDED
+
static void
-ncm_unbind(struct usb_configuration *c, struct usb_function *f)
+ncm_old_unbind(struct usb_configuration *c, struct usb_function *f)
{
struct f_ncm *ncm = func_to_ncm(f);
@@ -1296,21 +1326,6 @@ int __init ncm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
if (!can_support_ecm(c->cdev->gadget) || !ethaddr)
return -EINVAL;
- if (ncm_string_defs[0].id == 0) {
- status = usb_string_ids_tab(c->cdev, ncm_string_defs);
- if (status < 0)
- return status;
- ncm_control_intf.iInterface =
- ncm_string_defs[STRING_CTRL_IDX].id;
-
- status = ncm_string_defs[STRING_DATA_IDX].id;
- ncm_data_nop_intf.iInterface = status;
- ncm_data_intf.iInterface = status;
-
- ecm_desc.iMACAddress = ncm_string_defs[STRING_MAC_IDX].id;
- ncm_iad_desc.iFunction = ncm_string_defs[STRING_IAD_IDX].id;
- }
-
/* allocate and initialize one new instance */
ncm = kzalloc(sizeof *ncm, GFP_KERNEL);
if (!ncm)
@@ -1329,7 +1344,7 @@ int __init ncm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
ncm->port.func.strings = ncm_strings;
/* descriptors are per-instance copies */
ncm->port.func.bind = ncm_bind;
- ncm->port.func.unbind = ncm_unbind;
+ ncm->port.func.unbind = ncm_old_unbind;
ncm->port.func.set_alt = ncm_set_alt;
ncm->port.func.get_alt = ncm_get_alt;
ncm->port.func.setup = ncm_setup;
@@ -1343,3 +1358,101 @@ int __init ncm_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
kfree(ncm);
return status;
}
+
+#else
+
+static void ncm_free_inst(struct usb_function_instance *f)
+{
+ struct f_ncm_opts *opts;
+
+ opts = container_of(f, struct f_ncm_opts, func_inst);
+ gether_cleanup(netdev_priv(opts->net));
+ kfree(opts);
+}
+
+static struct usb_function_instance *ncm_alloc_inst(void)
+{
+ struct f_ncm_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ opts->func_inst.free_func_inst = ncm_free_inst;
+ opts->net = gether_setup_default();
+ if (IS_ERR(opts->net))
+ return ERR_PTR(PTR_ERR(opts->net));
+
+ return &opts->func_inst;
+}
+
+static void ncm_free(struct usb_function *f)
+{
+ struct f_ncm *ncm;
+
+ ncm = func_to_ncm(f);
+ kfree(ncm);
+}
+
+static void ncm_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_ncm *ncm = func_to_ncm(f);
+
+ DBG(c->cdev, "ncm unbind\n");
+
+ ncm_string_defs[0].id = 0;
+ usb_free_all_descriptors(f);
+
+ kfree(ncm->notify_req->buf);
+ usb_ep_free_request(ncm->notify, ncm->notify_req);
+}
+
+struct usb_function *ncm_alloc(struct usb_function_instance *fi)
+{
+ struct f_ncm *ncm;
+ struct f_ncm_opts *opts;
+ int status;
+
+ /* allocate and initialize one new instance */
+ ncm = kzalloc(sizeof(*ncm), GFP_KERNEL);
+ if (!ncm)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_ncm_opts, func_inst);
+
+ /* export host's Ethernet address in CDC format */
+ status = gether_get_host_addr_cdc(opts->net, ncm->ethaddr,
+ sizeof(ncm->ethaddr));
+ if (status < 12) { /* strlen("01234567890a") */
+ kfree(ncm);
+ return ERR_PTR(-EINVAL);
+ }
+ ncm_string_defs[STRING_MAC_IDX].s = ncm->ethaddr;
+
+ spin_lock_init(&ncm->lock);
+ ncm_reset_values(ncm);
+ ncm->port.ioport = netdev_priv(opts->net);
+ ncm->port.is_fixed = true;
+
+ ncm->port.func.name = "cdc_network";
+ ncm->port.func.strings = ncm_strings;
+ /* descriptors are per-instance copies */
+ ncm->port.func.bind = ncm_bind;
+ ncm->port.func.unbind = ncm_unbind;
+ ncm->port.func.set_alt = ncm_set_alt;
+ ncm->port.func.get_alt = ncm_get_alt;
+ ncm->port.func.setup = ncm_setup;
+ ncm->port.func.disable = ncm_disable;
+ ncm->port.func.free_func = ncm_free;
+
+ ncm->port.wrap = ncm_wrap_ntb;
+ ncm->port.unwrap = ncm_unwrap_ntb;
+
+ return &ncm->port.func;
+}
+
+DECLARE_USB_FUNCTION_INIT(ncm, ncm_alloc_inst, ncm_alloc);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yauheni Kaliuta");
+
+#endif
+
diff --git a/drivers/usb/gadget/ncm.c b/drivers/usb/gadget/ncm.c
index e411135..e2f97ee 100644
--- a/drivers/usb/gadget/ncm.c
+++ b/drivers/usb/gadget/ncm.c
@@ -36,6 +36,7 @@
* 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_FNCM_INCLUDED
#include "f_ncm.c"
/*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/gadget/u_ncm.h b/drivers/usb/gadget/u_ncm.h
new file mode 100644
index 0000000..5e20169
--- /dev/null
+++ b/drivers/usb/gadget/u_ncm.h
@@ -0,0 +1,26 @@
+/*
+ * u_ncm.h
+ *
+ * Utility definitions for the ncm 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_NCM_H
+#define U_NCM_H
+
+#include <linux/usb/composite.h>
+
+struct f_ncm_opts {
+ struct usb_function_instance func_inst;
+ struct net_device *net;
+};
+
+#endif /* U_NCM_H */
--
1.7.0.4
--
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