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 <bige...@linutronix.de>
---
drivers/usb/gadget/Kconfig | 4 ++
drivers/usb/gadget/Makefile | 1 +
drivers/usb/gadget/acm_ms.c | 2 +-
drivers/usb/gadget/cdc2.c | 2 +-
drivers/usb/gadget/f_acm.c | 141 +++++++++++++++++++++++++++++++----------
drivers/usb/gadget/multi.c | 2 +-
drivers/usb/gadget/nokia.c | 1 +
drivers/usb/gadget/serial.c | 83 ++++++++++++++++++------
drivers/usb/gadget/u_serial.h | 5 ++
9 files changed, 186 insertions(+), 55 deletions(-)
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 8aefbbd..b61c72f 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -500,6 +500,9 @@ config USB_LIBCOMPOSITE
tristate
depends on USB_GADGET
+config USB_F_ACM
+ tristate
+
config USB_F_SS_LB
tristate
@@ -758,6 +761,7 @@ config USB_GADGET_TARGET
config USB_G_SERIAL
tristate "Serial Gadget (with CDC ACM and CDC OBEX support)"
select USB_U_SERIAL
+ select USB_F_ACM
select USB_LIBCOMPOSITE
help
The Serial Gadget talks to the Linux-USB generic serial driver.
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index b88ee77..97a13c3 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -76,6 +76,7 @@ obj-$(CONFIG_USB_G_ACM_MS) += g_acm_ms.o
obj-$(CONFIG_USB_GADGET_TARGET) += tcm_usb_gadget.o
# USB Functions
+obj-$(CONFIG_USB_F_ACM) += f_acm.o
f_ss_lb-y := f_loopback.o f_sourcesink.o
obj-$(CONFIG_USB_F_SS_LB) += f_ss_lb.o
obj-$(CONFIG_USB_U_SERIAL) += u_serial.o
diff --git a/drivers/usb/gadget/acm_ms.c b/drivers/usb/gadget/acm_ms.c
index eb0fbda..4105a06 100644
--- a/drivers/usb/gadget/acm_ms.c
+++ b/drivers/usb/gadget/acm_ms.c
@@ -40,7 +40,7 @@
* 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_mass_storage.c"
diff --git a/drivers/usb/gadget/cdc2.c b/drivers/usb/gadget/cdc2.c
index 16911a5..13b17f0 100644
--- a/drivers/usb/gadget/cdc2.c
+++ b/drivers/usb/gadget/cdc2.c
@@ -42,7 +42,7 @@ 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"
diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index 3178fa7..3ea7dc8 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -16,7 +16,9 @@
#include <linux/slab.h>
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/device.h>
+#include <linux/err.h>
#include "u_serial.h"
#include "gadget_chips.h"
@@ -608,6 +610,22 @@ acm_bind(struct usb_configuration *c, struct usb_function
*f)
int status;
struct usb_ep *ep;
+ /* REVISIT might want instance-specific strings to help
+ * distinguish instances ...
+ */
+
+ /* maybe allocate device-global string IDs, and patch descriptors */
+ if (acm_string_defs[0].id == 0) {
+ status = usb_string_ids_tab(c->cdev, acm_string_defs);
+ if (status < 0)
+ return status;
+ acm_control_interface_desc.iInterface =
+ acm_string_defs[ACM_CTRL_IDX].id;
+ acm_data_interface_desc.iInterface =
+ acm_string_defs[ACM_DATA_IDX].id;
+ acm_iad_descriptor.iFunction = acm_string_defs[ACM_IAD_IDX].id;
+ }
+
/* allocate instance-specific interface IDs, and patch descriptors */
status = usb_interface_id(c, f);
if (status < 0)
@@ -700,14 +718,41 @@ acm_bind(struct usb_configuration *c, struct usb_function
*f)
return status;
}
+static struct f_acm *acm_alloc_basic_func(void)
+{
+ struct f_acm *acm;
+
+ acm = kzalloc(sizeof(*acm), GFP_KERNEL);
+ if (!acm)
+ return NULL;
+
+ spin_lock_init(&acm->lock);
+
+ acm->port.connect = acm_connect;
+ acm->port.disconnect = acm_disconnect;
+ acm->port.send_break = acm_send_break;
+
+ acm->port.func.name = "acm";
+ acm->port.func.strings = acm_strings;
+ /* descriptors are per-instance copies */
+ acm->port.func.bind = acm_bind;
+ acm->port.func.set_alt = acm_set_alt;
+ acm->port.func.setup = acm_setup;
+ acm->port.func.disable = acm_disable;
+
+ return acm;
+}
+
+#ifdef USB_FACM_INCLUDED
static void
-acm_unbind(struct usb_configuration *c, struct usb_function *f)
+acm_old_unbind(struct usb_configuration *c, struct usb_function *f)
{
struct f_acm *acm = func_to_acm(f);
acm_string_defs[0].id = 0;
usb_free_all_descriptors(f);
- gs_free_req(acm->notify, acm->notify_req);
+ if (acm->notify_req)
+ gs_free_req(acm->notify, acm->notify_req);
kfree(acm);
}
@@ -725,46 +770,74 @@ int acm_bind_config(struct usb_configuration *c, u8
port_num)
struct f_acm *acm;
int status;
- /* REVISIT might want instance-specific strings to help
- * distinguish instances ...
- */
-
- /* maybe allocate device-global string IDs, and patch descriptors */
- if (acm_string_defs[0].id == 0) {
- status = usb_string_ids_tab(c->cdev, acm_string_defs);
- if (status < 0)
- return status;
- acm_control_interface_desc.iInterface =
- acm_string_defs[ACM_CTRL_IDX].id;
- acm_data_interface_desc.iInterface =
- acm_string_defs[ACM_DATA_IDX].id;
- acm_iad_descriptor.iFunction = acm_string_defs[ACM_IAD_IDX].id;
- }
-
/* allocate and initialize one new instance */
- acm = kzalloc(sizeof *acm, GFP_KERNEL);
+ acm = acm_alloc_basic_func();
if (!acm)
return -ENOMEM;
- spin_lock_init(&acm->lock);
-
acm->port_num = port_num;
-
- acm->port.connect = acm_connect;
- acm->port.disconnect = acm_disconnect;
- acm->port.send_break = acm_send_break;
-
- acm->port.func.name = "acm";
- acm->port.func.strings = acm_strings;
- /* descriptors are per-instance copies */
- acm->port.func.bind = acm_bind;
- acm->port.func.unbind = acm_unbind;
- acm->port.func.set_alt = acm_set_alt;
- acm->port.func.setup = acm_setup;
- acm->port.func.disable = acm_disable;
+ acm->port.func.unbind = acm_old_unbind;
status = usb_add_function(c, &acm->port.func);
if (status)
kfree(acm);
return status;
}
+
+#else
+
+static void acm_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct f_acm *acm = func_to_acm(f);
+
+ acm_string_defs[0].id = 0;
+ usb_free_all_descriptors(f);
+ if (acm->notify_req)
+ gs_free_req(acm->notify, acm->notify_req);
+}
+
+static void acm_free_func(struct usb_function *f)
+{
+ struct f_acm *acm = func_to_acm(f);
+
+ kfree(acm);
+}
+
+static struct usb_function *acm_alloc_func(struct usb_function_instance *fi)
+{
+ struct f_serial_opts *opts;
+ struct f_acm *acm;
+
+ acm = acm_alloc_basic_func();
+ if (!acm)
+ return ERR_PTR(-ENOMEM);
+
+ opts = container_of(fi, struct f_serial_opts, func_inst);
+ acm->port_num = opts->port_num;
+ acm->port.func.unbind = acm_unbind;
+ acm->port.func.free_func = acm_free_func;
+
+ return &acm->port.func;
+}
+
+static void acm_free_instance(struct usb_function_instance *fi)
+{
+ struct f_serial_opts *opts;
+
+ opts = container_of(fi, struct f_serial_opts, func_inst);
+ kfree(opts);
+}
+
+static struct usb_function_instance *acm_alloc_instance(void)
+{
+ struct f_serial_opts *opts;
+
+ opts = kzalloc(sizeof(*opts), GFP_KERNEL);
+ if (!opts)
+ return ERR_PTR(-ENOMEM);
+ opts->func_inst.free_func_inst = acm_free_instance;
+ return &opts->func_inst;
+}
+DECLARE_USB_FUNCTION_INIT(acm, acm_alloc_instance, acm_alloc_func);
+MODULE_LICENSE("GPL");
+#endif
diff --git a/drivers/usb/gadget/multi.c b/drivers/usb/gadget/multi.c
index 9ca0ac0..24b0f56 100644
--- a/drivers/usb/gadget/multi.c
+++ b/drivers/usb/gadget/multi.c
@@ -41,7 +41,7 @@ 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"
diff --git a/drivers/usb/gadget/nokia.c b/drivers/usb/gadget/nokia.c
index 228ad13..e22591f 100644
--- a/drivers/usb/gadget/nokia.c
+++ b/drivers/usb/gadget/nokia.c
@@ -37,6 +37,7 @@
* 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"
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 @@ MODULE_PARM_DESC(n_ports, "number of ports to create,
default=1");
/*-------------------------------------------------------------------------*/
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 @@ static struct usb_configuration serial_config_driver = {
.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;
+
+ 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;
+ }
- for (i = 0; i < n_ports; i++)
- gserial_free_line(tty_lines[i]);
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 @@ static int __init gs_bind(struct usb_composite_dev *cdev)
}
/* 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 @@ static int __init gs_bind(struct usb_composite_dev *cdev)
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,
diff --git a/drivers/usb/gadget/u_serial.h b/drivers/usb/gadget/u_serial.h
index f06ee9a..66ce73a 100644
--- a/drivers/usb/gadget/u_serial.h
+++ b/drivers/usb/gadget/u_serial.h
@@ -17,6 +17,11 @@
#define MAX_U_SERIAL_PORTS 4
+struct f_serial_opts {
+ struct usb_function_instance func_inst;
+ u8 port_num;
+};
+
/*
* One non-multiplexed "serial" I/O port ... there can be several of these
* on any given USB peripheral device, if it provides enough endpoints.
--
1.7.10.4
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