[U-Boot] [PATCH v5 08/12] USB: gadget: added a saner gadget downloader registration API
Mateusz Zalega
m.zalega at samsung.com
Mon Apr 28 21:13:28 CEST 2014
Preprocessor definitions and hardcoded implementation selection in
g_dnl core were replaced by a linker list made of (usb_function_name,
bind_callback) pairs.
Signed-off-by: Mateusz Zalega <m.zalega at samsung.com>
Acked-by: Lukasz Majewski <l.majewski at samsung.com>
Acked-by: Marek Vasut <marex at denx.de>
---
Changes since v1:
- reordered
since v2:
- fixed coding style issues reported by [Marek Vasut]
- added convenient macro wrappers for used ll_entry_declare
since v4:
- fixed coding style issues reported by [Jaehoon Chung]
---
common/cmd_dfu.c | 3 +-
common/cmd_thordown.c | 3 +-
common/cmd_usb_mass_storage.c | 2 +-
drivers/usb/gadget/f_dfu.c | 3 ++
drivers/usb/gadget/f_mass_storage.c | 3 ++
drivers/usb/gadget/f_thor.c | 2 ++
drivers/usb/gadget/g_dnl.c | 64 ++++++++++++++++---------------------
include/dfu.h | 7 ----
include/g_dnl.h | 23 +++++++++++++
include/thor.h | 8 -----
include/usb_mass_storage.h | 8 -----
11 files changed, 62 insertions(+), 64 deletions(-)
diff --git a/common/cmd_dfu.c b/common/cmd_dfu.c
index 5547678..a03538d 100644
--- a/common/cmd_dfu.c
+++ b/common/cmd_dfu.c
@@ -22,7 +22,6 @@ static int do_dfu(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
char *interface = argv[2];
char *devstring = argv[3];
- char *s = "dfu";
int ret, i = 0;
ret = dfu_init_env_entities(interface, simple_strtoul(devstring,
@@ -38,7 +37,7 @@ static int do_dfu(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
int controller_index = simple_strtoul(usb_controller, NULL, 0);
board_usb_init(controller_index, USB_INIT_DEVICE);
- g_dnl_register(s);
+ g_dnl_register("usb_dnl_dfu");
while (1) {
if (dfu_reset())
/*
diff --git a/common/cmd_thordown.c b/common/cmd_thordown.c
index c4b3511..2dd7509 100644
--- a/common/cmd_thordown.c
+++ b/common/cmd_thordown.c
@@ -22,7 +22,6 @@ int do_thor_down(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
char *interface = argv[2];
char *devstring = argv[3];
- const char *s = "thor";
int ret;
puts("TIZEN \"THOR\" Downloader\n");
@@ -40,7 +39,7 @@ int do_thor_down(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
goto exit;
}
- g_dnl_register(s);
+ g_dnl_register("usb_dnl_thor");
ret = thor_init();
if (ret) {
diff --git a/common/cmd_usb_mass_storage.c b/common/cmd_usb_mass_storage.c
index 14a5b6a..d8d9efd 100644
--- a/common/cmd_usb_mass_storage.c
+++ b/common/cmd_usb_mass_storage.c
@@ -40,7 +40,7 @@ int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
return CMD_RET_FAILURE;
}
- g_dnl_register("ums");
+ g_dnl_register("usb_dnl_ums");
/* Timeout unit: seconds */
int cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
diff --git a/drivers/usb/gadget/f_dfu.c b/drivers/usb/gadget/f_dfu.c
index de75ff1..1b1e179 100644
--- a/drivers/usb/gadget/f_dfu.c
+++ b/drivers/usb/gadget/f_dfu.c
@@ -24,6 +24,7 @@
#include <linux/usb/composite.h>
#include <dfu.h>
+#include <g_dnl.h>
#include "f_dfu.h"
struct f_dfu {
@@ -817,3 +818,5 @@ int dfu_add(struct usb_configuration *c)
return dfu_bind_config(c);
}
+
+DECLARE_GADGET_BIND_CALLBACK(usb_dnl_dfu, dfu_add);
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 4fae5cd..6374bb9 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -255,6 +255,7 @@
#include <linux/usb/gadget.h>
#include <linux/usb/composite.h>
#include <usb/lin_gadget_compat.h>
+#include <g_dnl.h>
/*------------------------------------------------------------------------*/
@@ -2778,3 +2779,5 @@ int fsg_init(struct ums *ums_dev)
return 0;
}
+
+DECLARE_GADGET_BIND_CALLBACK(usb_dnl_ums, fsg_add);
diff --git a/drivers/usb/gadget/f_thor.c b/drivers/usb/gadget/f_thor.c
index f5c0224..59d246d 100644
--- a/drivers/usb/gadget/f_thor.c
+++ b/drivers/usb/gadget/f_thor.c
@@ -999,3 +999,5 @@ int thor_add(struct usb_configuration *c)
debug("%s:\n", __func__);
return thor_func_init(c);
}
+
+DECLARE_GADGET_BIND_CALLBACK(usb_dnl_thor, thor_add);
diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c
index 973d737..743bae5 100644
--- a/drivers/usb/gadget/g_dnl.c
+++ b/drivers/usb/gadget/g_dnl.c
@@ -41,7 +41,6 @@
#define DRIVER_VERSION "usb_dnl 2.0"
-static const char shortname[] = "usb_dnl_";
static const char product[] = "USB download gadget";
static char g_dnl_serial[MAX_STRING_SERIAL];
static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
@@ -96,29 +95,36 @@ static int g_dnl_unbind(struct usb_composite_dev *cdev)
free(cdev->config);
cdev->config = NULL;
debug("%s: calling usb_gadget_disconnect for "
- "controller '%s'\n", shortname, gadget->name);
+ "controller '%s'\n", __func__, gadget->name);
usb_gadget_disconnect(gadget);
return 0;
}
+static inline struct g_dnl_bind_callback *g_dnl_bind_callback_first(void)
+{
+ return ll_entry_start(struct g_dnl_bind_callback,
+ g_dnl_bind_callbacks);
+}
+
+static inline struct g_dnl_bind_callback *g_dnl_bind_callback_end(void)
+{
+ return ll_entry_end(struct g_dnl_bind_callback,
+ g_dnl_bind_callbacks);
+}
+
static int g_dnl_do_config(struct usb_configuration *c)
{
const char *s = c->cdev->driver->name;
- int ret = -1;
+ struct g_dnl_bind_callback *callback = g_dnl_bind_callback_first();
debug("%s: configuration: 0x%p composite dev: 0x%p\n",
__func__, c, c->cdev);
- printf("GADGET DRIVER: %s\n", s);
- if (!strcmp(s, "usb_dnl_dfu"))
- ret = dfu_add(c);
- else if (!strcmp(s, "usb_dnl_ums"))
- ret = fsg_add(c);
- else if (!strcmp(s, "usb_dnl_thor"))
- ret = thor_add(c);
-
- return ret;
+ for (; callback != g_dnl_bind_callback_end(); callback++)
+ if (!strcmp(s, callback->usb_function_name))
+ return callback->fptr(c);
+ return -ENODEV;
}
static int g_dnl_config_register(struct usb_composite_dev *cdev)
@@ -208,12 +214,12 @@ static int g_dnl_bind(struct usb_composite_dev *cdev)
device_desc.bcdDevice = cpu_to_le16(gcnum);
else {
debug("%s: controller '%s' not recognized\n",
- shortname, gadget->name);
+ __func__, gadget->name);
device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
}
debug("%s: calling usb_gadget_connect for "
- "controller '%s'\n", shortname, gadget->name);
+ "controller '%s'\n", __func__, gadget->name);
usb_gadget_connect(gadget);
return 0;
@@ -232,36 +238,22 @@ static struct usb_composite_driver g_dnl_driver = {
.unbind = g_dnl_unbind,
};
-int g_dnl_register(const char *type)
+/*
+ * NOTICE:
+ * Registering via USB function name won't be necessary after rewriting
+ * g_dnl to support multiple USB functions.
+ */
+int g_dnl_register(const char *name)
{
- /* The largest function name is 4 */
- static char name[sizeof(shortname) + 4];
- int ret;
-
- if (!strcmp(type, "dfu")) {
- strcpy(name, shortname);
- strcat(name, type);
- } else if (!strcmp(type, "ums")) {
- strcpy(name, shortname);
- strcat(name, type);
- } else if (!strcmp(type, "thor")) {
- strcpy(name, shortname);
- strcat(name, type);
- } else {
- printf("%s: unknown command: %s\n", __func__, type);
- return -EINVAL;
- }
+ int ret = usb_composite_register(&g_dnl_driver);
+ debug("%s: g_dnl_driver.name = %s\n", __func__, name);
g_dnl_driver.name = name;
- debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name);
- ret = usb_composite_register(&g_dnl_driver);
-
if (ret) {
printf("%s: failed!, error: %d\n", __func__, ret);
return ret;
}
-
return 0;
}
diff --git a/include/dfu.h b/include/dfu.h
index dcd3215..2409168 100644
--- a/include/dfu.h
+++ b/include/dfu.h
@@ -168,12 +168,5 @@ static inline int dfu_fill_entity_ram(struct dfu_entity *dfu, char *s)
}
#endif
-#ifdef CONFIG_DFU_FUNCTION
int dfu_add(struct usb_configuration *c);
-#else
-int dfu_add(struct usb_configuration *c)
-{
- return 0;
-}
-#endif
#endif /* __DFU_ENTITY_H_ */
diff --git a/include/g_dnl.h b/include/g_dnl.h
index f4e8d10..1b1b35e 100644
--- a/include/g_dnl.h
+++ b/include/g_dnl.h
@@ -10,6 +10,29 @@
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
+#include <linux/usb/composite.h>
+#include <linker_lists.h>
+
+/*
+ * @usb_fname: unescaped USB function name
+ * @callback_ptr: bind callback, one per function name
+ */
+#define DECLARE_GADGET_BIND_CALLBACK(usb_fname, callback_ptr) \
+ ll_entry_declare(struct g_dnl_bind_callback, \
+ __usb_function_name_##usb_fname, \
+ g_dnl_bind_callbacks) = { \
+ .usb_function_name = #usb_fname, \
+ .fptr = callback_ptr \
+ }
+
+typedef int (*g_dnl_bind_callback_f)(struct usb_configuration *);
+
+/* used in Gadget downloader callback linker list */
+struct g_dnl_bind_callback {
+ const char *usb_function_name;
+ g_dnl_bind_callback_f fptr;
+};
+
int g_dnl_bind_fixup(struct usb_device_descriptor *, const char *);
int g_dnl_board_usb_cable_connected(void);
int g_dnl_register(const char *s);
diff --git a/include/thor.h b/include/thor.h
index afeade4..5051be7 100644
--- a/include/thor.h
+++ b/include/thor.h
@@ -15,13 +15,5 @@
int thor_handle(void);
int thor_init(void);
-
-#ifdef CONFIG_THOR_FUNCTION
int thor_add(struct usb_configuration *c);
-#else
-int thor_add(struct usb_configuration *c)
-{
- return 0;
-}
-#endif
#endif /* __THOR_H_ */
diff --git a/include/usb_mass_storage.h b/include/usb_mass_storage.h
index 058dcf1..ed46064 100644
--- a/include/usb_mass_storage.h
+++ b/include/usb_mass_storage.h
@@ -40,13 +40,5 @@ int fsg_init(struct ums *);
void fsg_cleanup(void);
struct ums *ums_init(unsigned int);
int fsg_main_thread(void *);
-
-#ifdef CONFIG_USB_GADGET_MASS_STORAGE
int fsg_add(struct usb_configuration *c);
-#else
-int fsg_add(struct usb_configuration *c)
-{
- return 0;
-}
-#endif
#endif /* __USB_MASS_STORAGE_H__ */
--
1.9.0
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