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path: root/drivers/usb/gadget/mass_storage.c
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Diffstat (limited to 'drivers/usb/gadget/mass_storage.c')
-rw-r--r--drivers/usb/gadget/mass_storage.c125
1 files changed, 101 insertions, 24 deletions
diff --git a/drivers/usb/gadget/mass_storage.c b/drivers/usb/gadget/mass_storage.c
index 080e577773d..8e27a8c9644 100644
--- a/drivers/usb/gadget/mass_storage.c
+++ b/drivers/usb/gadget/mass_storage.c
@@ -37,16 +37,16 @@
#define DRIVER_DESC "Mass Storage Gadget"
#define DRIVER_VERSION "2009/09/11"
-/*-------------------------------------------------------------------------*/
-
/*
- * kbuild is not very cooperative with respect to linking separately
- * compiled library objects into one module. So for now we won't use
- * separate compilation ... ensuring init/exit sections work to shrink
- * the runtime footprint, and giving us at least some parts of what
- * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
+ * Thanks to NetChip Technologies for donating this product ID.
+ *
+ * DO NOT REUSE THESE IDs with any other driver!! Ever!!
+ * Instead: allocate your own, using normal USB-IF procedures.
*/
-#include "f_mass_storage.c"
+#define FSG_VENDOR_ID 0x0525 /* NetChip */
+#define FSG_PRODUCT_ID 0xa4a5 /* Linux-USB File-backed Storage Gadget */
+
+#include "f_mass_storage.h"
/*-------------------------------------------------------------------------*/
USB_GADGET_COMPOSITE_OPTIONS();
@@ -97,11 +97,28 @@ static struct usb_gadget_strings *dev_strings[] = {
NULL,
};
+static struct usb_function_instance *fi_msg;
+static struct usb_function *f_msg;
+
/****************************** Configurations ******************************/
static struct fsg_module_parameters mod_data = {
.stall = 1
};
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
+
+#else
+
+/*
+ * Number of buffers we will use.
+ * 2 is usually enough for good buffering pipeline
+ */
+#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
FSG_MODULE_PARAMETERS(/* no prefix */, mod_data);
static unsigned long msg_registered;
@@ -115,13 +132,7 @@ static int msg_thread_exits(struct fsg_common *common)
static int __init msg_do_config(struct usb_configuration *c)
{
- static const struct fsg_operations ops = {
- .thread_exits = msg_thread_exits,
- };
- static struct fsg_common common;
-
- struct fsg_common *retp;
- struct fsg_config config;
+ struct fsg_opts *opts;
int ret;
if (gadget_is_otg(c->cdev->gadget)) {
@@ -129,15 +140,24 @@ static int __init msg_do_config(struct usb_configuration *c)
c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
}
- fsg_config_from_params(&config, &mod_data);
- config.ops = &ops;
+ opts = fsg_opts_from_func_inst(fi_msg);
+
+ f_msg = usb_get_function(fi_msg);
+ if (IS_ERR(f_msg))
+ return PTR_ERR(f_msg);
+
+ ret = fsg_common_run_thread(opts->common);
+ if (ret)
+ goto put_func;
+
+ ret = usb_add_function(c, f_msg);
+ if (ret)
+ goto put_func;
- retp = fsg_common_init(&common, c->cdev, &config);
- if (IS_ERR(retp))
- return PTR_ERR(retp);
+ return 0;
- ret = fsg_bind_config(c->cdev, c, &common);
- fsg_common_put(&common);
+put_func:
+ usb_put_function(f_msg);
return ret;
}
@@ -152,23 +172,79 @@ static struct usb_configuration msg_config_driver = {
static int __init msg_bind(struct usb_composite_dev *cdev)
{
+ static const struct fsg_operations ops = {
+ .thread_exits = msg_thread_exits,
+ };
+ struct fsg_opts *opts;
+ struct fsg_config config;
int status;
+ fi_msg = usb_get_function_instance("mass_storage");
+ if (IS_ERR(fi_msg))
+ return PTR_ERR(fi_msg);
+
+ fsg_config_from_params(&config, &mod_data, fsg_num_buffers);
+ opts = fsg_opts_from_func_inst(fi_msg);
+
+ opts->no_configfs = true;
+ status = fsg_common_set_num_buffers(opts->common, fsg_num_buffers);
+ if (status)
+ goto fail;
+
+ status = fsg_common_set_nluns(opts->common, config.nluns);
+ if (status)
+ goto fail_set_nluns;
+
+ fsg_common_set_ops(opts->common, &ops);
+
+ status = fsg_common_set_cdev(opts->common, cdev, config.can_stall);
+ if (status)
+ goto fail_set_cdev;
+
+ fsg_common_set_sysfs(opts->common, true);
+ status = fsg_common_create_luns(opts->common, &config);
+ if (status)
+ goto fail_set_cdev;
+
+ fsg_common_set_inquiry_string(opts->common, config.vendor_name,
+ config.product_name);
+
status = usb_string_ids_tab(cdev, strings_dev);
if (status < 0)
- return status;
+ goto fail_string_ids;
msg_device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
status = usb_add_config(cdev, &msg_config_driver, msg_do_config);
if (status < 0)
- return status;
+ goto fail_string_ids;
+
usb_composite_overwrite_options(cdev, &coverwrite);
dev_info(&cdev->gadget->dev,
DRIVER_DESC ", version: " DRIVER_VERSION "\n");
set_bit(0, &msg_registered);
return 0;
+
+fail_string_ids:
+ fsg_common_remove_luns(opts->common);
+fail_set_cdev:
+ fsg_common_free_luns(opts->common);
+fail_set_nluns:
+ fsg_common_free_buffers(opts->common);
+fail:
+ usb_put_function_instance(fi_msg);
+ return status;
}
+static int msg_unbind(struct usb_composite_dev *cdev)
+{
+ if (!IS_ERR(f_msg))
+ usb_put_function(f_msg);
+
+ if (!IS_ERR(fi_msg))
+ usb_put_function_instance(fi_msg);
+
+ return 0;
+}
/****************************** Some noise ******************************/
@@ -179,6 +255,7 @@ static __refdata struct usb_composite_driver msg_driver = {
.needs_serial = 1,
.strings = dev_strings,
.bind = msg_bind,
+ .unbind = msg_unbind,
};
MODULE_DESCRIPTION(DRIVER_DESC);