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Commit 5f72bbfd authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Felipe Balbi
Browse files

usb: gadget: acm_ms: use function framework for ACM 



This patch converts the acm_ms gadget to make use of the function
framework to request the ACM function.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent ff47f594

drivers/usb/gadget/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -844,6 +844,7 @@ config USB_G_ACM_MS 
	depends on BLOCK

	select USB_LIBCOMPOSITE

	select USB_U_SERIAL

	select USB_F_ACM

	help

	  This driver provides two functions in one configuration:

	  a mass storage, and a CDC ACM (serial port) link.

drivers/usb/gadget/acm_ms.c

+27 −6
Original line number Diff line number Diff line
@@ -40,8 +40,6 @@ 
 * the runtime footprint, and giving us at least some parts of what

 * a "gcc --combine ... part1.c part2.c part3.c ... " build would.

 */

#define USB_FACM_INCLUDED

#include "f_acm.c"

#include "f_mass_storage.c"



/*-------------------------------------------------------------------------*/
@@ -112,12 +110,14 @@ static struct fsg_common fsg_common; 


/*-------------------------------------------------------------------------*/

static unsigned char tty_line;



static struct usb_function *f_acm;

static struct usb_function_instance *f_acm_inst;

/*

 * We _always_ have both ACM and mass storage functions.

 */

static int __init acm_ms_do_config(struct usb_configuration *c)

{

	struct f_serial_opts *opts;

	int	status;



	if (gadget_is_otg(c->cdev->gadget)) {
@@ -125,16 +125,35 @@ static int __init acm_ms_do_config(struct usb_configuration *c) 
		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;

	}



	f_acm_inst = usb_get_function_instance("acm");

	if (IS_ERR(f_acm_inst))

		return PTR_ERR(f_acm_inst);



	opts = container_of(f_acm_inst, struct f_serial_opts, func_inst);

	opts->port_num = tty_line;



	f_acm = usb_get_function(f_acm_inst);

	if (IS_ERR(f_acm)) {

		status = PTR_ERR(f_acm);

		goto err_func;

	}



	status = acm_bind_config(c, tty_line);

	status = usb_add_function(c, f_acm);

	if (status < 0)

		return status;

		goto err_conf;



	status = fsg_bind_config(c->cdev, c, &fsg_common);

	if (status < 0)

		return status;

		goto err_fsg;



	return 0;

err_fsg:

	usb_remove_function(c, f_acm);

err_conf:

	usb_put_function(f_acm);

err_func:

	usb_put_function_instance(f_acm_inst);

	return status;

}



static struct usb_configuration acm_ms_config_driver = {
@@ -195,6 +214,8 @@ fail0: 


static int __exit acm_ms_unbind(struct usb_composite_dev *cdev)

{

	usb_put_function(f_acm);

	usb_put_function_instance(f_acm_inst);

	gserial_free_line(tty_line);

	return 0;

}