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path: root/drivers/usb/gadget/f_acm.c
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Diffstat (limited to 'drivers/usb/gadget/f_acm.c')
-rw-r--r--drivers/usb/gadget/f_acm.c137
1 files changed, 73 insertions, 64 deletions
diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index 1ae180baa597..4b7e33e5d9c6 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -715,13 +715,31 @@ fail:
return status;
}
-static struct f_acm *acm_alloc_basic_func(void)
+static void acm_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_acm *acm = func_to_acm(f);
+
+ acm_string_defs[0].id = 0;
+ usb_free_all_descriptors(f);
+ if (acm->notify_req)
+ gs_free_req(acm->notify, acm->notify_req);
+}
+
+static void acm_free_func(struct usb_function *f)
+{
+ struct f_acm *acm = func_to_acm(f);
+
+ kfree(acm);
+}
+
+static struct usb_function *acm_alloc_func(struct usb_function_instance *fi)
{
- struct f_acm *acm;
+ struct f_serial_opts *opts;
+ struct f_acm *acm;
acm = kzalloc(sizeof(*acm), GFP_KERNEL);
if (!acm)
- return NULL;
+ return ERR_PTR(-ENOMEM);
spin_lock_init(&acm->lock);
@@ -730,109 +748,100 @@ static struct f_acm *acm_alloc_basic_func(void)
acm->port.send_break = acm_send_break;
acm->port.func.name = "acm";
+ acm->port.func.strings = acm_strings;
/* descriptors are per-instance copies */
acm->port.func.bind = acm_bind;
acm->port.func.set_alt = acm_set_alt;
acm->port.func.setup = acm_setup;
acm->port.func.disable = acm_disable;
- return acm;
+ opts = container_of(fi, struct f_serial_opts, func_inst);
+ acm->port_num = opts->port_num;
+ acm->port.func.unbind = acm_unbind;
+ acm->port.func.free_func = acm_free_func;
+
+ return &acm->port.func;
}
-#ifdef USB_FACM_INCLUDED
-static void
-acm_old_unbind(struct usb_configuration *c, struct usb_function *f)
+static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
{
- struct f_acm *acm = func_to_acm(f);
-
- usb_free_all_descriptors(f);
- if (acm->notify_req)
- gs_free_req(acm->notify, acm->notify_req);
- kfree(acm);
+ return container_of(to_config_group(item), struct f_serial_opts,
+ func_inst.group);
}
-/**
- * acm_bind_config - add a CDC ACM function to a configuration
- * @c: the configuration to support the CDC ACM instance
- * @port_num: /dev/ttyGS* port this interface will use
- * Context: single threaded during gadget setup
- *
- * Returns zero on success, else negative errno.
- *
- */
-int acm_bind_config(struct usb_configuration *c, u8 port_num)
+CONFIGFS_ATTR_STRUCT(f_serial_opts);
+static ssize_t f_acm_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
{
- struct f_acm *acm;
- int status;
-
- /* allocate and initialize one new instance */
- acm = acm_alloc_basic_func();
- if (!acm)
- return -ENOMEM;
-
- acm->port_num = port_num;
- acm->port.func.unbind = acm_old_unbind;
-
- status = usb_add_function(c, &acm->port.func);
- if (status)
- kfree(acm);
- return status;
+ struct f_serial_opts *opts = to_f_serial_opts(item);
+ struct f_serial_opts_attribute *f_serial_opts_attr =
+ container_of(attr, struct f_serial_opts_attribute, attr);
+ ssize_t ret = 0;
+
+ if (f_serial_opts_attr->show)
+ ret = f_serial_opts_attr->show(opts, page);
+ return ret;
}
-#else
-
-static void acm_unbind(struct usb_configuration *c, struct usb_function *f)
+static void acm_attr_release(struct config_item *item)
{
- struct f_acm *acm = func_to_acm(f);
+ struct f_serial_opts *opts = to_f_serial_opts(item);
- acm_string_defs[0].id = 0;
- usb_free_all_descriptors(f);
- if (acm->notify_req)
- gs_free_req(acm->notify, acm->notify_req);
+ usb_put_function_instance(&opts->func_inst);
}
-static void acm_free_func(struct usb_function *f)
-{
- struct f_acm *acm = func_to_acm(f);
+static struct configfs_item_operations acm_item_ops = {
+ .release = acm_attr_release,
+ .show_attribute = f_acm_attr_show,
+};
- kfree(acm);
+static ssize_t f_acm_port_num_show(struct f_serial_opts *opts, char *page)
+{
+ return sprintf(page, "%u\n", opts->port_num);
}
-static struct usb_function *acm_alloc_func(struct usb_function_instance *fi)
-{
- struct f_serial_opts *opts;
- struct f_acm *acm;
+static struct f_serial_opts_attribute f_acm_port_num =
+ __CONFIGFS_ATTR_RO(port_num, f_acm_port_num_show);
- acm = acm_alloc_basic_func();
- if (!acm)
- return ERR_PTR(-ENOMEM);
- opts = container_of(fi, struct f_serial_opts, func_inst);
- acm->port_num = opts->port_num;
- acm->port.func.unbind = acm_unbind;
- acm->port.func.free_func = acm_free_func;
+static struct configfs_attribute *acm_attrs[] = {
+ &f_acm_port_num.attr,
+ NULL,
+};
- return &acm->port.func;
-}
+static struct config_item_type acm_func_type = {
+ .ct_item_ops = &acm_item_ops,
+ .ct_attrs = acm_attrs,
+ .ct_owner = THIS_MODULE,
+};
static void acm_free_instance(struct usb_function_instance *fi)
{
struct f_serial_opts *opts;
opts = container_of(fi, struct f_serial_opts, func_inst);
+ gserial_free_line(opts->port_num);
kfree(opts);
}
static struct usb_function_instance *acm_alloc_instance(void)
{
struct f_serial_opts *opts;
+ int ret;
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
if (!opts)
return ERR_PTR(-ENOMEM);
opts->func_inst.free_func_inst = acm_free_instance;
+ ret = gserial_alloc_line(&opts->port_num);
+ if (ret) {
+ kfree(opts);
+ return ERR_PTR(ret);
+ }
+ config_group_init_type_name(&opts->func_inst.group, "",
+ &acm_func_type);
return &opts->func_inst;
}
DECLARE_USB_FUNCTION_INIT(acm, acm_alloc_instance, acm_alloc_func);
MODULE_LICENSE("GPL");
-#endif