From 0b6a1e6ff7e62a1ab5a8924bffb12c17c183308a Mon Sep 17 00:00:00 2001 From: Andrzej Pietrasiewicz Date: Wed, 27 Mar 2013 09:12:03 +0100 Subject: [PATCH] usb: gadget: f_serial: add configfs support this patch implements the new configfs based interface on f_serial function driver. Signed-off-by: Andrzej Pietrasiewicz Signed-off-by: Kyungmin Park Signed-off-by: Felipe Balbi --- drivers/usb/gadget/f_serial.c | 55 +++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/drivers/usb/gadget/f_serial.c b/drivers/usb/gadget/f_serial.c index 49c3d146f9b0..981113c9924d 100644 --- a/drivers/usb/gadget/f_serial.c +++ b/drivers/usb/gadget/f_serial.c @@ -258,6 +258,59 @@ static int gser_bind(struct usb_configuration *c, struct usb_function *f) return status; } +static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item) +{ + return container_of(to_config_group(item), struct f_serial_opts, + func_inst.group); +} + +CONFIGFS_ATTR_STRUCT(f_serial_opts); +static ssize_t f_serial_attr_show(struct config_item *item, + struct configfs_attribute *attr, + char *page) +{ + 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; +} + +static void serial_attr_release(struct config_item *item) +{ + struct f_serial_opts *opts = to_f_serial_opts(item); + + usb_put_function_instance(&opts->func_inst); +} + +static struct configfs_item_operations serial_item_ops = { + .release = serial_attr_release, + .show_attribute = f_serial_attr_show, +}; + +static ssize_t f_serial_port_num_show(struct f_serial_opts *opts, char *page) +{ + return sprintf(page, "%u\n", opts->port_num); +} + +static struct f_serial_opts_attribute f_serial_port_num = + __CONFIGFS_ATTR_RO(port_num, f_serial_port_num_show); + +static struct configfs_attribute *acm_attrs[] = { + &f_serial_port_num.attr, + NULL, +}; + +static struct config_item_type serial_func_type = { + .ct_item_ops = &serial_item_ops, + .ct_attrs = acm_attrs, + .ct_owner = THIS_MODULE, +}; + static void gser_free_inst(struct usb_function_instance *f) { struct f_serial_opts *opts; @@ -282,6 +335,8 @@ static struct usb_function_instance *gser_alloc_inst(void) kfree(opts); return ERR_PTR(ret); } + config_group_init_type_name(&opts->func_inst.group, "", + &serial_func_type); return &opts->func_inst; } -- GitLab