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usb: gadget: cdc2: 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: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
hifive-unleashed-5.1
Sebastian Andrzej Siewior 2012-12-23 21:10:09 +01:00 committed by Felipe Balbi
parent 5f72bbfd9f
commit 29a6645f7c
2 changed files with 24 additions and 5 deletions
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1
drivers/usb/gadget/Kconfig
View File

@ -816,6 +816,7 @@ config USB_CDC_COMPOSITE
depends on NET
select USB_LIBCOMPOSITE
select USB_U_SERIAL
select USB_F_ACM
help
This driver provides two functions in one configuration:
a CDC Ethernet (ECM) link, and a CDC ACM (serial port) link.

28
drivers/usb/gadget/cdc2.c
View File

@ -42,8 +42,6 @@ USB_GADGET_COMPOSITE_OPTIONS();
* 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_ecm.c"
#include "u_ether.c"
@ -107,6 +105,8 @@ static struct usb_gadget_strings *dev_strings[] = {
static u8 hostaddr[ETH_ALEN];
/*-------------------------------------------------------------------------*/
static struct usb_function *f_acm;
static struct usb_function_instance *fi_serial;
static unsigned char tty_line;
/*
@ -114,6 +114,7 @@ static unsigned char tty_line;
*/
static int __init cdc_do_config(struct usb_configuration *c)
{
struct f_serial_opts *opts;
int status;
if (gadget_is_otg(c->cdev->gadget)) {
@ -125,11 +126,26 @@ static int __init cdc_do_config(struct usb_configuration *c)
if (status < 0)
return status;
status = acm_bind_config(c, tty_line);
if (status < 0)
return status;
fi_serial = usb_get_function_instance("acm");
if (IS_ERR(fi_serial))
return PTR_ERR(fi_serial);
opts = container_of(fi_serial, struct f_serial_opts, func_inst);
opts->port_num = tty_line;
f_acm = usb_get_function(fi_serial);
if (IS_ERR(f_acm))
goto err_func_acm;
status = usb_add_function(c, f_acm);
if (status)
goto err_conf;
return 0;
err_conf:
usb_put_function(f_acm);
err_func_acm:
usb_put_function_instance(fi_serial);
return status;
}
static struct usb_configuration cdc_config_driver = {
@ -192,6 +208,8 @@ fail0:
static int __exit cdc_unbind(struct usb_composite_dev *cdev)
{
usb_put_function(f_acm);
usb_put_function_instance(fi_serial);
gserial_free_line(tty_line);
gether_cleanup();
return 0;