usb: gadget: f_acm: convert to new function interface with backwards compatibility
This patch converts f_acm into a module which uses the new function
interface. It also converts one of its users that is g_serial to make
use of it. The other users of it (g_nokia for instance) are still using
the old include file system and should not notice the change at all. So
they can be converter later independently.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index a883562..68d7bb0 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -36,7 +36,6 @@
* the runtime footprint, and giving us at least some parts of what
* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
*/
-#include "f_acm.c"
#include "f_obex.c"
#include "f_serial.c"
@@ -129,16 +128,6 @@
/*-------------------------------------------------------------------------*/
static unsigned char tty_lines[MAX_U_SERIAL_PORTS];
-static int __init serial_bind_acm_config(struct usb_configuration *c)
-{
- unsigned i;
- int status = 0;
-
- for (i = 0; i < n_ports && status == 0; i++)
- status = acm_bind_config(c, tty_lines[i]);
- return status;
-}
-
static int __init serial_bind_obex_config(struct usb_configuration *c)
{
unsigned i;
@@ -166,13 +155,58 @@
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
};
-static int gs_unbind(struct usb_composite_dev *cdev)
+static struct usb_function_instance *fi_serial[MAX_U_SERIAL_PORTS];
+static struct usb_function *f_serial[MAX_U_SERIAL_PORTS];
+
+static int serial_register_ports(struct usb_composite_dev *cdev,
+ struct usb_configuration *c, const char *f_name)
{
int i;
+ int ret;
- for (i = 0; i < n_ports; i++)
- gserial_free_line(tty_lines[i]);
+ ret = usb_add_config_only(cdev, c);
+ if (ret)
+ goto out;
+
+ for (i = 0; i < n_ports; i++) {
+ struct f_serial_opts *opts;
+
+ fi_serial[i] = usb_get_function_instance(f_name);
+ if (IS_ERR(fi_serial[i])) {
+ ret = PTR_ERR(fi_serial[i]);
+ goto fail;
+ }
+ opts = container_of(fi_serial[i], struct f_serial_opts, func_inst);
+ opts->port_num = tty_lines[i];
+
+ f_serial[i] = usb_get_function(fi_serial[i]);
+ if (IS_ERR(f_serial[i])) {
+ ret = PTR_ERR(f_serial[i]);
+ goto err_get_func;
+ }
+
+ ret = usb_add_function(c, f_serial[i]);
+ if (ret)
+ goto err_add_func;
+ }
+
return 0;
+
+err_add_func:
+ usb_put_function(f_serial[i]);
+err_get_func:
+ usb_put_function_instance(fi_serial[i]);
+
+fail:
+ i--;
+ while (i >= 0) {
+ usb_remove_function(c, f_serial[i]);
+ usb_put_function(f_serial[i]);
+ usb_put_function_instance(fi_serial[i]);
+ i--;
+ }
+out:
+ return ret;
}
static int __init gs_bind(struct usb_composite_dev *cdev)
@@ -204,10 +238,11 @@
}
/* register our configuration */
- if (use_acm)
- status = usb_add_config(cdev, &serial_config_driver,
- serial_bind_acm_config);
- else if (use_obex)
+ if (use_acm) {
+ status = serial_register_ports(cdev, &serial_config_driver,
+ "acm");
+ usb_ep_autoconfig_reset(cdev->gadget);
+ } else if (use_obex)
status = usb_add_config(cdev, &serial_config_driver,
serial_bind_obex_config);
else
@@ -228,6 +263,18 @@
return status;
}
+static int gs_unbind(struct usb_composite_dev *cdev)
+{
+ int i;
+
+ for (i = 0; i < n_ports; i++) {
+ usb_put_function(f_serial[i]);
+ usb_put_function_instance(fi_serial[i]);
+ gserial_free_line(tty_lines[i]);
+ }
+ return 0;
+}
+
static __refdata struct usb_composite_driver gserial_driver = {
.name = "g_serial",
.dev = &device_desc,