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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: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
hifive-unleashed-5.1
Sebastian Andrzej Siewior 2012-12-23 21:10:10 +01:00 committed by Felipe Balbi
parent 29a6645f7c
commit 59835ad727
2 changed files with 53 additions and 10 deletions
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1
drivers/usb/gadget/Kconfig
View File

@ -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

62
drivers/usb/gadget/multi.c
View File

@ -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;