usb: gadget: f_subset: add configfs support
f_subset learns about configfs so we can, eventually, remove in-kernel gadget drivers. Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>hifive-unleashed-5.1
Andrzej Pietrasiewicz
Felipe Balbi
parent
74bf963d1d
commit
02832e56f8
|
|
@ -0,0 +1,14 @@
|
|||
What: /config/usb-gadget/gadget/functions/geth.name
|
||||
Date: May 2013
|
||||
KenelVersion: 3.11
|
||||
Description:
|
||||
The attributes:
|
||||
|
||||
ifname - network device interface name associated with
|
||||
this function instance
|
||||
qmult - queue length multiplier for high and
|
||||
super speed
|
||||
host_addr - MAC address of host's end of this
|
||||
Ethernet over USB link
|
||||
dev_addr - MAC address of device's end of this
|
||||
Ethernet over USB link
|
||||
|
|
@ -547,6 +547,16 @@ choice
|
|||
|
||||
# this first set of drivers all depend on bulk-capable hardware.
|
||||
|
||||
config USB_CONFIGFS_ECM_SUBSET
|
||||
boolean "Ethernet Control Model (CDC ECM) subset"
|
||||
depends on USB_CONFIGFS
|
||||
depends on NET
|
||||
select USB_U_ETHER
|
||||
select USB_F_SUBSET
|
||||
help
|
||||
On hardware that can't implement the full protocol,
|
||||
a simple CDC subset is used, placing fewer demands on USB.
|
||||
|
||||
config USB_CONFIGFS_EEM
|
||||
bool "Ethernet Emulation Model (EEM)"
|
||||
depends on USB_CONFIGFS
|
||||
|
|
|
|||
|
|
@ -17,6 +17,7 @@
|
|||
#include <linux/etherdevice.h>
|
||||
|
||||
#include "u_ether.h"
|
||||
#include "u_ether_configfs.h"
|
||||
#include "u_gether.h"
|
||||
|
||||
/*
|
||||
|
|
@ -313,8 +314,10 @@ geth_bind(struct usb_configuration *c, struct usb_function *f)
|
|||
* with regard to gether_opts->bound access
|
||||
*/
|
||||
if (!gether_opts->bound) {
|
||||
mutex_lock(&gether_opts->lock);
|
||||
gether_set_gadget(gether_opts->net, cdev->gadget);
|
||||
status = gether_register_netdev(gether_opts->net);
|
||||
mutex_unlock(&gether_opts->lock);
|
||||
if (status)
|
||||
return status;
|
||||
gether_opts->bound = true;
|
||||
|
|
@ -445,6 +448,41 @@ int geth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
|
|||
|
||||
#else
|
||||
|
||||
static inline struct f_gether_opts *to_f_gether_opts(struct config_item *item)
|
||||
{
|
||||
return container_of(to_config_group(item), struct f_gether_opts,
|
||||
func_inst.group);
|
||||
}
|
||||
|
||||
/* f_gether_item_ops */
|
||||
USB_ETHERNET_CONFIGFS_ITEM(gether);
|
||||
|
||||
/* f_gether_opts_dev_addr */
|
||||
USB_ETHERNET_CONFIGFS_ITEM_ATTR_DEV_ADDR(gether);
|
||||
|
||||
/* f_gether_opts_host_addr */
|
||||
USB_ETHERNET_CONFIGFS_ITEM_ATTR_HOST_ADDR(gether);
|
||||
|
||||
/* f_gether_opts_qmult */
|
||||
USB_ETHERNET_CONFIGFS_ITEM_ATTR_QMULT(gether);
|
||||
|
||||
/* f_gether_opts_ifname */
|
||||
USB_ETHERNET_CONFIGFS_ITEM_ATTR_IFNAME(gether);
|
||||
|
||||
static struct configfs_attribute *gether_attrs[] = {
|
||||
&f_gether_opts_dev_addr.attr,
|
||||
&f_gether_opts_host_addr.attr,
|
||||
&f_gether_opts_qmult.attr,
|
||||
&f_gether_opts_ifname.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
static struct config_item_type gether_func_type = {
|
||||
.ct_item_ops = &gether_item_ops,
|
||||
.ct_attrs = gether_attrs,
|
||||
.ct_owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
static void geth_free_inst(struct usb_function_instance *f)
|
||||
{
|
||||
struct f_gether_opts *opts;
|
||||
|
|
@ -464,12 +502,15 @@ static struct usb_function_instance *geth_alloc_inst(void)
|
|||
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
|
||||
if (!opts)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
mutex_init(&opts->lock);
|
||||
opts->func_inst.free_func_inst = geth_free_inst;
|
||||
opts->net = gether_setup_default();
|
||||
if (IS_ERR(opts->net))
|
||||
return ERR_CAST(opts->net);
|
||||
|
||||
config_group_init_type_name(&opts->func_inst.group, "",
|
||||
&gether_func_type);
|
||||
|
||||
return &opts->func_inst;
|
||||
}
|
||||
|
||||
|
|
@ -500,6 +541,8 @@ static struct usb_function *geth_alloc(struct usb_function_instance *fi)
|
|||
|
||||
opts = container_of(fi, struct f_gether_opts, func_inst);
|
||||
|
||||
mutex_lock(&opts->lock);
|
||||
opts->refcnt++;
|
||||
/* export host's Ethernet address in CDC format */
|
||||
status = gether_get_host_addr_cdc(opts->net, geth->ethaddr,
|
||||
sizeof(geth->ethaddr));
|
||||
|
|
@ -510,6 +553,7 @@ static struct usb_function *geth_alloc(struct usb_function_instance *fi)
|
|||
geth_string_defs[1].s = geth->ethaddr;
|
||||
|
||||
geth->port.ioport = netdev_priv(opts->net);
|
||||
mutex_unlock(&opts->lock);
|
||||
geth->port.cdc_filter = DEFAULT_FILTER;
|
||||
|
||||
geth->port.func.name = "cdc_subset";
|
||||
|
|
|
|||
|
|
@ -22,6 +22,15 @@ struct f_gether_opts {
|
|||
struct usb_function_instance func_inst;
|
||||
struct net_device *net;
|
||||
bool bound;
|
||||
|
||||
/*
|
||||
* Read/write access to configfs attributes is handled by configfs.
|
||||
*
|
||||
* This is to protect the data from concurrent access by read/write
|
||||
* and create symlink/remove symlink.
|
||||
*/
|
||||
struct mutex lock;
|
||||
int refcnt;
|
||||
};
|
||||
|
||||
#endif /* U_GETHER_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue