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Commit 59835ad7 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Felipe Balbi
Browse files

usb: gadget: multi: 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 29a6645f

drivers/usb/gadget/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -859,6 +859,7 @@ config USB_G_MULTI 
	select USB_G_MULTI_CDC if !USB_G_MULTI_RNDIS

	select USB_LIBCOMPOSITE

	select USB_U_SERIAL

	select USB_F_ACM

	help

	  The Multifunction Composite Gadget provides Ethernet (RNDIS

	  and/or CDC Ethernet), mass storage and ACM serial link

drivers/usb/gadget/multi.c

+52 −10
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/kernel.h>

#include <linux/module.h>



#include "u_serial.h"

#if defined USB_ETH_RNDIS

#  undef USB_ETH_RNDIS

#endif
@@ -41,8 +42,6 @@ MODULE_LICENSE("GPL"); 
 * a "gcc --combine ... part1.c part2.c part3.c ... " build would.

 */

#include "f_mass_storage.c"

#define USB_FACM_INCLUDED

#include "f_acm.c"



#include "f_ecm.c"

#include "f_subset.c"
@@ -137,10 +136,12 @@ static struct fsg_common fsg_common; 
static u8 hostaddr[ETH_ALEN];



static unsigned char tty_line;

static struct usb_function_instance *fi_acm;



/********** RNDIS **********/



#ifdef USB_ETH_RNDIS

static struct usb_function *f_acm_rndis;



static __init int rndis_do_config(struct usb_configuration *c)

{
@@ -155,15 +156,25 @@ static __init int rndis_do_config(struct usb_configuration *c) 
	if (ret < 0)

		return ret;



	ret = acm_bind_config(c, tty_line);

	if (ret < 0)

		return ret;

	f_acm_rndis = usb_get_function(fi_acm);

	if (IS_ERR(f_acm_rndis))

		goto err_func_acm;



	ret = usb_add_function(c, f_acm_rndis);

	if (ret)

		goto err_conf;



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

	if (ret < 0)

		return ret;

		goto err_fsg;



	return 0;

err_fsg:

	usb_remove_function(c, f_acm_rndis);

err_conf:

	usb_put_function(f_acm_rndis);

err_func_acm:

	return ret;

}



static int rndis_config_register(struct usb_composite_dev *cdev)
@@ -192,6 +203,7 @@ static int rndis_config_register(struct usb_composite_dev *cdev) 
/********** CDC ECM **********/



#ifdef CONFIG_USB_G_MULTI_CDC

static struct usb_function *f_acm_multi;



static __init int cdc_do_config(struct usb_configuration *c)

{
@@ -206,15 +218,26 @@ static __init int cdc_do_config(struct usb_configuration *c) 
	if (ret < 0)

		return ret;



	ret = acm_bind_config(c, tty_line);

	if (ret < 0)

		return ret;

	/* implicit port_num is zero */

	f_acm_multi = usb_get_function(fi_acm);

	if (IS_ERR(f_acm_multi))

		goto err_func_acm;



	ret = usb_add_function(c, f_acm_multi);

	if (ret)

		goto err_conf;



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

	if (ret < 0)

		return ret;

		goto err_fsg;



	return 0;

err_fsg:

	usb_remove_function(c, f_acm_multi);

err_conf:

	usb_put_function(f_acm_multi);

err_func_acm:

	return ret;

}



static int cdc_config_register(struct usb_composite_dev *cdev)
@@ -246,6 +269,7 @@ static int cdc_config_register(struct usb_composite_dev *cdev) 
static int __ref multi_bind(struct usb_composite_dev *cdev)

{

	struct usb_gadget *gadget = cdev->gadget;

	struct f_serial_opts *opts;

	int status;



	if (!can_support_ecm(cdev->gadget)) {
@@ -264,6 +288,15 @@ static int __ref multi_bind(struct usb_composite_dev *cdev) 
	if (status < 0)

		goto fail0;



	fi_acm = usb_get_function_instance("acm");

	if (IS_ERR(fi_acm)) {

		status = PTR_ERR(fi_acm);

		goto fail0dot5;

	}



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

	opts->port_num = tty_line;



	/* set up mass storage function */

	{

		void *retp;
@@ -300,6 +333,8 @@ static int __ref multi_bind(struct usb_composite_dev *cdev) 
fail2:

	fsg_common_put(&fsg_common);

fail1:

	usb_put_function_instance(fi_acm);

fail0dot5:

	gserial_free_line(tty_line);

fail0:

	gether_cleanup();
@@ -308,6 +343,13 @@ fail0: 


static int __exit multi_unbind(struct usb_composite_dev *cdev)

{

#ifdef CONFIG_USB_G_MULTI_CDC

	usb_put_function(f_acm_multi);

#endif

#ifdef USB_ETH_RNDIS

	usb_put_function(f_acm_rndis);

#endif

	usb_put_function_instance(fi_acm);

	gserial_free_line(tty_line);

	gether_cleanup();

	return 0;