Converting f_phonet to the new function interface requires converting
the f_phonet's function code and its users.
This patch converts the f_phonet.c to the new function interface.
The file is now compiled into a separate usb_f_phonet.ko module.
The old function interface is provided by means of 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_phonet.c | 148 +++++++++++++++++++++++++++++++++++++++--
drivers/usb/gadget/nokia.c | 1 +
drivers/usb/gadget/u_phonet.h | 9 +++
5 files changed, 158 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 0cf2ae7..de7eb2a 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -524,6 +524,9 @@ config USB_F_NCM
config USB_F_ECM
tristate
+config USB_F_PHONET
+ tristate
+
choice
tristate "USB Gadget Drivers"
default USB_ETH
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 66152f5..db8ce05 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -52,6 +52,8 @@ usb_f_ncm-y := f_ncm.o
obj-$(CONFIG_USB_F_NCM) += usb_f_ncm.o
usb_f_ecm-y := f_ecm.o
obj-$(CONFIG_USB_F_ECM) += usb_f_ecm.o
+usb_f_phonet-y := f_phonet.o
+obj-$(CONFIG_USB_F_PHONET) += usb_f_phonet.o
#
# USB gadget drivers
diff --git a/drivers/usb/gadget/f_phonet.c b/drivers/usb/gadget/f_phonet.c
index e79ee34..e2adab7 100644
--- a/drivers/usb/gadget/f_phonet.c
+++ b/drivers/usb/gadget/f_phonet.c
@@ -13,6 +13,7 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/device.h>
#include <linux/netdevice.h>
@@ -473,8 +474,7 @@ static void pn_disconnect(struct usb_function *f)
/*-------------------------------------------------------------------------*/
-static __init
-int pn_bind(struct usb_configuration *c, struct usb_function *f)
+static int pn_bind(struct usb_configuration *c, struct usb_function *f)
{
struct usb_composite_dev *cdev = c->cdev;
struct usb_gadget *gadget = cdev->gadget;
@@ -482,6 +482,27 @@ int pn_bind(struct usb_configuration *c, struct usb_function *f)
struct usb_ep *ep;
int status, i;
+#ifndef USBF_PHONET_INCLUDED
+ struct f_phonet_opts *phonet_opts;
+
+ phonet_opts = container_of(f->fi, struct f_phonet_opts, func_inst);
+
+ /*
+ * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
+ * configurations are bound in sequence with list_for_each_entry,
+ * in each configuration its functions are bound in sequence
+ * with list_for_each_entry, so we assume no race condition
+ * with regard to phonet_opts->bound access
+ */
+ if (!phonet_opts->bound) {
+ gphonet_set_gadget(phonet_opts->net, gadget);
+ status = gphonet_register_netdev(phonet_opts->net);
+ if (status)
+ return status;
+ phonet_opts->bound = true;
+ }
+#endif
+
/* Reserve interface IDs */
status = usb_interface_id(c, f);
if (status < 0)
@@ -555,8 +576,10 @@ err:
return status;
}
+#ifdef USBF_PHONET_INCLUDED
+
static void
-pn_unbind(struct usb_configuration *c, struct usb_function *f)
+pn_old_unbind(struct usb_configuration *c, struct usb_function *f)
{
struct f_phonet *fp = func_to_pn(f);
int i;
@@ -588,7 +611,7 @@ int __init phonet_bind_config(struct usb_configuration *c,
fp->dev = dev;
fp->function.name = "phonet";
fp->function.bind = pn_bind;
- fp->function.unbind = pn_unbind;
+ fp->function.unbind = pn_old_unbind;
fp->function.set_alt = pn_set_alt;
fp->function.get_alt = pn_get_alt;
fp->function.disable = pn_disconnect;
@@ -600,7 +623,122 @@ int __init phonet_bind_config(struct usb_configuration *c,
return err;
}
-struct net_device __init *gphonet_setup(struct usb_gadget *gadget)
+#else
+
+static void phonet_free_inst(struct usb_function_instance *f)
+{
+ struct f_phonet_opts *opts;
+
+ opts = container_of(f, struct f_phonet_opts, func_inst);
+ gphonet_cleanup(opts->net);
+ kfree(opts);
+}
+
+static struct usb_function_instance *phonet_alloc_inst(void)
+{
+ struct f_phonet_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+
+ opts->func_inst.free_func_inst = phonet_free_inst;
+ opts->net = gphonet_setup_default();
+ if (IS_ERR(opts->net))
+ return ERR_PTR(PTR_ERR(opts->net));
+
+ return &opts->func_inst;
+}
+
+static void phonet_free(struct usb_function *f)
+{
+ struct f_phonet *phonet;
+
+ phonet = func_to_pn(f);
+ kfree(phonet);
+}
+
+static void pn_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_phonet *fp = func_to_pn(f);
+ int i;
+
+ /* We are already disconnected */
+ if (fp->in_req)
+ usb_ep_free_request(fp->in_ep, fp->in_req);
+ for (i = 0; i < phonet_rxq_size; i++)
+ if (fp->out_reqv[i])
+ usb_ep_free_request(fp->out_ep, fp->out_reqv[i]);
+
+ usb_free_all_descriptors(f);
+}
+
+struct usb_function *phonet_alloc(struct usb_function_instance *fi)
+{
+ struct f_phonet *fp;
+ struct f_phonet_opts *opts;
+ int size;
+
+ size = sizeof(*fp) + (phonet_rxq_size * sizeof(struct usb_request *));
+ fp = kzalloc(size, GFP_KERNEL);
+ if (!fp)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_phonet_opts, func_inst);
+
+ fp->dev = opts->net;
+ fp->function.name = "phonet";
+ fp->function.bind = pn_bind;
+ fp->function.unbind = pn_unbind;
+ fp->function.set_alt = pn_set_alt;
+ fp->function.get_alt = pn_get_alt;
+ fp->function.disable = pn_disconnect;
+ fp->function.free_func = phonet_free;
+ spin_lock_init(&fp->rx.lock);
+
+ return &fp->function;
+}
+
+struct net_device *gphonet_setup_default(void)
+{
+ struct net_device *dev;
+ struct phonet_port *port;
+
+ /* Create net device */
+ dev = alloc_netdev(sizeof(*port), "upnlink%d", pn_net_setup);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ port = netdev_priv(dev);
+ spin_lock_init(&port->lock);
+ netif_carrier_off(dev);
+
+ return dev;
+}
+
+void gphonet_set_gadget(struct net_device *net, struct usb_gadget *g)
+{
+ SET_NETDEV_DEV(net, &g->dev);
+}
+
+int gphonet_register_netdev(struct net_device *net)
+{
+ int status;
+
+ status = register_netdev(net);
+ if (status)
+ free_netdev(net);
+
+ return status;
+}
+
+DECLARE_USB_FUNCTION_INIT(phonet, phonet_alloc_inst, phonet_alloc);
+MODULE_AUTHOR("Rémi Denis-Courmont");
+MODULE_LICENSE("GPL");
+
+#endif
+
+struct net_device *gphonet_setup(struct usb_gadget *gadget)
{
struct net_device *dev;
struct phonet_port *port;
diff --git a/drivers/usb/gadget/nokia.c b/drivers/usb/gadget/nokia.c
index 2864f6e..4e1e4d6 100644
--- a/drivers/usb/gadget/nokia.c
+++ b/drivers/usb/gadget/nokia.c
@@ -40,6 +40,7 @@
*/
#define USBF_ECM_INCLUDED
#include "f_ecm.c"
+#define USBF_PHONET_INCLUDED
#include "f_phonet.c"
#include "u_ether.h"
diff --git a/drivers/usb/gadget/u_phonet.h b/drivers/usb/gadget/u_phonet.h
index 459ee32..1ff5ad5 100644
--- a/drivers/usb/gadget/u_phonet.h
+++ b/drivers/usb/gadget/u_phonet.h
@@ -14,6 +14,15 @@
#include <linux/usb/composite.h>
#include <linux/usb/cdc.h>
+struct f_phonet_opts {
+ struct usb_function_instance func_inst;
+ bool bound;
+ struct net_device *net;
+};
+
+struct net_device *gphonet_setup_default(void);
+void gphonet_set_gadget(struct net_device *net, struct usb_gadget *g);
+int gphonet_register_netdev(struct net_device *net);
struct net_device *gphonet_setup(struct usb_gadget *gadget);
int phonet_bind_config(struct usb_configuration *c, struct net_device *dev);
void gphonet_cleanup(struct net_device *dev);
--
1.7.0.4
--
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