usb: gadget: nokia: use function framework for ACM

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

The "old" include interface for acm is now removed since nokia was the
last user of it (for ACM).

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 56 insertions, 26 deletions

diff --git a/drivers/usb/gadget/nokia.c b/drivers/usb/gadget/nokia.c
index def37403989..c3ad777a2bd 100644
--- a/drivers/usb/gadget/nokia.c
+++ b/drivers/usb/gadget/nokia.c
@@ -37,8 +37,6 @@
  * 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_ecm.c"
 #include "f_obex.c"
 #include "f_serial.c"
@@ -98,7 +96,8 @@ MODULE_AUTHOR("Felipe Balbi");
 MODULE_LICENSE("GPL");
 
 /*-------------------------------------------------------------------------*/
-
+static struct usb_function *f_acm_cfg1;
+static struct usb_function *f_acm_cfg2;
 static u8 hostaddr[ETH_ALEN];
 
 enum {
@@ -110,8 +109,27 @@ enum {
 
 static unsigned char tty_lines[TTY_PORTS_MAX];
 
+static struct usb_configuration nokia_config_500ma_driver = {
+	.label		= "Bus Powered",
+	.bConfigurationValue = 1,
+	/* .iConfiguration = DYNAMIC */
+	.bmAttributes	= USB_CONFIG_ATT_ONE,
+	.MaxPower	= 500,
+};
+
+static struct usb_configuration nokia_config_100ma_driver = {
+	.label		= "Self Powered",
+	.bConfigurationValue = 2,
+	/* .iConfiguration = DYNAMIC */
+	.bmAttributes	= USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
+	.MaxPower	= 100,
+};
+
+static struct usb_function_instance *fi_acm;
+
 static int __init nokia_bind_config(struct usb_configuration *c)
 {
+	struct usb_function *f_acm;
 	int status = 0;
 
 	status = phonet_bind_config(c);
@@ -126,36 +144,36 @@ static int __init nokia_bind_config(struct usb_configuration *c)
 	if (status)
 		printk(KERN_DEBUG "could not bind obex config %d\n", 0);
 
-	status = acm_bind_config(c, tty_lines[TTY_PORT_ACM]);
+	f_acm = usb_get_function(fi_acm);
+	if (IS_ERR(f_acm))
+		return PTR_ERR(f_acm);
+
+	status = usb_add_function(c, f_acm);
 	if (status)
-		printk(KERN_DEBUG "could not bind acm config\n");
+		goto err_conf;
 
 	status = ecm_bind_config(c, hostaddr);
-	if (status)
-		printk(KERN_DEBUG "could not bind ecm config\n");
+	if (status) {
+		pr_debug("could not bind ecm config %d\n", status);
+		goto err_ecm;
+	}
+	if (c == &nokia_config_500ma_driver)
+		f_acm_cfg1 = f_acm;
+	else
+		f_acm_cfg2 = f_acm;
 
 	return status;
+err_ecm:
+	usb_remove_function(c, f_acm);
+err_conf:
+	usb_put_function(f_acm);
+	return status;
 }
 
-static struct usb_configuration nokia_config_500ma_driver = {
-	.label		= "Bus Powered",
-	.bConfigurationValue = 1,
-	/* .iConfiguration = DYNAMIC */
-	.bmAttributes	= USB_CONFIG_ATT_ONE,
-	.MaxPower	= 500,
-};
-
-static struct usb_configuration nokia_config_100ma_driver = {
-	.label		= "Self Powered",
-	.bConfigurationValue = 2,
-	/* .iConfiguration = DYNAMIC */
-	.bmAttributes	= USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
-	.MaxPower	= 100,
-};
-
 static int __init nokia_bind(struct usb_composite_dev *cdev)
 {
 	struct usb_gadget	*gadget = cdev->gadget;
+	struct f_serial_opts	*opts;
 	int			status;
 	int			cur_line;
 
@@ -185,22 +203,32 @@ static int __init nokia_bind(struct usb_composite_dev *cdev)
 	if (!gadget_supports_altsettings(gadget))
 		goto err_usb;
 
+	fi_acm = usb_get_function_instance("acm");
+	if (IS_ERR(fi_acm))
+		goto err_usb;
+	opts = container_of(fi_acm, struct f_serial_opts, func_inst);
+	opts->port_num = tty_lines[TTY_PORT_ACM];
+
 	/* finally register the configuration */
 	status = usb_add_config(cdev, &nokia_config_500ma_driver,
 			nokia_bind_config);
 	if (status < 0)
-		goto err_usb;
+		goto err_acm_inst;
 
 	status = usb_add_config(cdev, &nokia_config_100ma_driver,
 			nokia_bind_config);
 	if (status < 0)
-		goto err_usb;
+		goto err_put_cfg1;
 
 	usb_composite_overwrite_options(cdev, &coverwrite);
 	dev_info(&gadget->dev, "%s\n", NOKIA_LONG_NAME);
 
 	return 0;
 
+err_put_cfg1:
+	usb_put_function(f_acm_cfg1);
+err_acm_inst:
+	usb_put_function_instance(fi_acm);
 err_usb:
 	gether_cleanup();
 err_ether:
@@ -217,6 +245,9 @@ static int __exit nokia_unbind(struct usb_composite_dev *cdev)
 {
 	int i;
 
+	usb_put_function(f_acm_cfg1);
+	usb_put_function(f_acm_cfg2);
+	usb_put_function_instance(fi_acm);
 	gphonet_cleanup();
 
 	for (i = 0; i < TTY_PORTS_MAX; i++)
@@ -247,4 +278,3 @@ static void __exit nokia_cleanup(void)
 	usb_composite_unregister(&nokia_driver);
 }
 module_exit(nokia_cleanup);
-