diff options
Diffstat (limited to 'drivers/usb/gadget/f_phonet.c')
| -rw-r--r-- | drivers/usb/gadget/f_phonet.c | 177 |
1 files changed, 150 insertions, 27 deletions
diff --git a/drivers/usb/gadget/f_phonet.c b/drivers/usb/gadget/f_phonet.c index b21ab558b6c..7944fb0efe3 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> @@ -25,6 +26,7 @@ #include <linux/usb/composite.h> #include "u_phonet.h" +#include "u_ether.h" #define PN_MEDIA_USB 0x1B #define MAXPACKET 512 @@ -478,8 +480,7 @@ 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; @@ -487,6 +488,27 @@ 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) @@ -560,8 +582,98 @@ err: return status; } -static void -pn_unbind(struct usb_configuration *c, struct usb_function *f) +static inline struct f_phonet_opts *to_f_phonet_opts(struct config_item *item) +{ + return container_of(to_config_group(item), struct f_phonet_opts, + func_inst.group); +} + +CONFIGFS_ATTR_STRUCT(f_phonet_opts); +static ssize_t f_phonet_attr_show(struct config_item *item, + struct configfs_attribute *attr, + char *page) +{ + struct f_phonet_opts *opts = to_f_phonet_opts(item); + struct f_phonet_opts_attribute *f_phonet_opts_attr = + container_of(attr, struct f_phonet_opts_attribute, attr); + ssize_t ret = 0; + + if (f_phonet_opts_attr->show) + ret = f_phonet_opts_attr->show(opts, page); + return ret; +} + +static void phonet_attr_release(struct config_item *item) +{ + struct f_phonet_opts *opts = to_f_phonet_opts(item); + + usb_put_function_instance(&opts->func_inst); +} + +static struct configfs_item_operations phonet_item_ops = { + .release = phonet_attr_release, + .show_attribute = f_phonet_attr_show, +}; + +static ssize_t f_phonet_ifname_show(struct f_phonet_opts *opts, char *page) +{ + return gether_get_ifname(opts->net, page, PAGE_SIZE); +} + +static struct f_phonet_opts_attribute f_phonet_ifname = + __CONFIGFS_ATTR_RO(ifname, f_phonet_ifname_show); + +static struct configfs_attribute *phonet_attrs[] = { + &f_phonet_ifname.attr, + NULL, +}; + +static struct config_item_type phonet_func_type = { + .ct_item_ops = &phonet_item_ops, + .ct_attrs = phonet_attrs, + .ct_owner = THIS_MODULE, +}; + +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); + if (opts->bound) + gphonet_cleanup(opts->net); + else + free_netdev(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)); + + config_group_init_type_name(&opts->func_inst.group, "", + &phonet_func_type); + + 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; @@ -574,61 +686,72 @@ pn_unbind(struct usb_configuration *c, struct usb_function *f) usb_ep_free_request(fp->out_ep, fp->out_reqv[i]); usb_free_all_descriptors(f); - kfree(fp); } -/*-------------------------------------------------------------------------*/ - -static struct net_device *dev; - -int __init phonet_bind_config(struct usb_configuration *c) +struct usb_function *phonet_alloc(struct usb_function_instance *fi) { struct f_phonet *fp; - int err, size; + 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 -ENOMEM; + return ERR_PTR(-ENOMEM); + + opts = container_of(fi, struct f_phonet_opts, func_inst); - fp->dev = dev; + 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); - err = usb_add_function(c, &fp->function); - if (err) - kfree(fp); - return err; + return &fp->function; } -int __init gphonet_setup(struct usb_gadget *gadget) +struct net_device *gphonet_setup_default(void) { + struct net_device *dev; struct phonet_port *port; - int err; /* Create net device */ - BUG_ON(dev); dev = alloc_netdev(sizeof(*port), "upnlink%d", pn_net_setup); if (!dev) - return -ENOMEM; + return ERR_PTR(-ENOMEM); port = netdev_priv(dev); spin_lock_init(&port->lock); netif_carrier_off(dev); - SET_NETDEV_DEV(dev, &gadget->dev); - err = register_netdev(dev); - if (err) - free_netdev(dev); - return err; + 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; } -void gphonet_cleanup(void) +void gphonet_cleanup(struct net_device *dev) { unregister_netdev(dev); } + +DECLARE_USB_FUNCTION_INIT(phonet, phonet_alloc_inst, phonet_alloc); +MODULE_AUTHOR("Rémi Denis-Courmont"); +MODULE_LICENSE("GPL"); |