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Date: Wed, 03 Feb 2016 13:39:45 +0100
From: Robert Baldyga <r.baldyga@...sung.com>
To: balbi@...com
Cc: gregkh@...uxfoundation.org, andrzej.p@...sung.com,
m.szyprowski@...sung.com, b.zolnierkie@...sung.com,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
Robert Baldyga <r.baldyga@...sung.com>
Subject: [PATCH v4 37/43] usb: gadget: f_mass_storage: conversion to new API
Generate descriptors in new format and attach them to USB function in
prep_descs(). Change set_alt() implementation and implement clear_alt()
operation. Remove boilerplate code.
Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
---
drivers/usb/gadget/function/f_mass_storage.c | 91 +++++++++-------------------
drivers/usb/gadget/function/storage_common.c | 29 ---------
drivers/usb/gadget/function/storage_common.h | 3 -
3 files changed, 29 insertions(+), 94 deletions(-)
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index 223ccf8..fa2326f 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -233,6 +233,17 @@ static const char fsg_string_interface[] = "Mass Storage";
#include "storage_common.h"
#include "f_mass_storage.h"
+USB_COMPOSITE_ENDPOINT(ep_in, &fsg_fs_bulk_in_desc, &fsg_hs_bulk_in_desc,
+ &fsg_ss_bulk_in_desc, &fsg_ss_bulk_in_comp_desc);
+USB_COMPOSITE_ENDPOINT(ep_out, &fsg_fs_bulk_out_desc, &fsg_hs_bulk_out_desc,
+ &fsg_ss_bulk_out_desc, &fsg_ss_bulk_out_comp_desc);
+
+USB_COMPOSITE_ALTSETTING(intf0alt0, &fsg_intf_desc, &ep_in, &ep_out);
+
+USB_COMPOSITE_INTERFACE(intf0, &intf0alt0);
+
+USB_COMPOSITE_DESCRIPTORS(fsg_descs, &intf0);
+
/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */
static struct usb_string fsg_strings[] = {
{FSG_STRING_INTERFACE, fsg_string_interface},
@@ -325,8 +336,6 @@ struct fsg_dev {
struct usb_gadget *gadget; /* Copy of cdev->gadget */
struct fsg_common *common;
- u16 interface_number;
-
unsigned int bulk_in_enabled:1;
unsigned int bulk_out_enabled:1;
@@ -522,7 +531,7 @@ static int fsg_setup(struct usb_function *f,
if (ctrl->bRequestType !=
(USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
break;
- if (w_index != fsg->interface_number || w_value != 0 ||
+ if (w_index != usb_get_interface_id(f, 0) || w_value != 0 ||
w_length != 0)
return -EDOM;
@@ -538,7 +547,7 @@ static int fsg_setup(struct usb_function *f,
if (ctrl->bRequestType !=
(USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE))
break;
- if (w_index != fsg->interface_number || w_value != 0 ||
+ if (w_index != usb_get_interface_id(f, 0) || w_value != 0 ||
w_length != 1)
return -EDOM;
VDBG(fsg, "get max LUN\n");
@@ -2328,19 +2337,27 @@ reset:
static int fsg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct fsg_dev *fsg = fsg_from_func(f);
+
+ fsg->bulk_in = usb_function_get_ep(f, intf, 0);
+ if (!fsg->bulk_in)
+ return -ENODEV;
+
+ fsg->bulk_out = usb_function_get_ep(f, intf, 1);
+ if (!fsg->bulk_out)
+ return -ENODEV;
+
fsg->common->new_fsg = fsg;
raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
return USB_GADGET_DELAYED_STATUS;
}
-static void fsg_disable(struct usb_function *f)
+static void fsg_clear_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct fsg_dev *fsg = fsg_from_func(f);
fsg->common->new_fsg = NULL;
raise_exception(fsg->common, FSG_STATE_CONFIG_CHANGE);
}
-
/*-------------------------------------------------------------------------*/
static void handle_exception(struct fsg_common *common)
@@ -3025,13 +3042,11 @@ static void fsg_common_release(struct kref *ref)
/*-------------------------------------------------------------------------*/
-static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
+static int fsg_prep_descs(struct usb_function *f)
{
struct fsg_dev *fsg = fsg_from_func(f);
struct fsg_common *common = fsg->common;
- struct usb_gadget *gadget = c->cdev->gadget;
- int i;
- struct usb_ep *ep;
+ struct usb_gadget *gadget = f->config->cdev->gadget;
unsigned max_burst;
int ret;
struct fsg_opts *opts;
@@ -3045,7 +3060,7 @@ static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
opts = fsg_opts_from_func_inst(f->fi);
if (!opts->no_configfs) {
- ret = fsg_common_set_cdev(fsg->common, c->cdev,
+ ret = fsg_common_set_cdev(fsg->common, f->config->cdev,
fsg->common->can_stall);
if (ret)
return ret;
@@ -3057,58 +3072,12 @@ static int fsg_bind(struct usb_configuration *c, struct usb_function *f)
fsg->gadget = gadget;
- /* New interface */
- i = usb_interface_id(c, f);
- if (i < 0)
- goto fail;
- fsg_intf_desc.bInterfaceNumber = i;
- fsg->interface_number = i;
-
- /* Find all the endpoints we will use */
- ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_in_desc);
- if (!ep)
- goto autoconf_fail;
- fsg->bulk_in = ep;
-
- ep = usb_ep_autoconfig(gadget, &fsg_fs_bulk_out_desc);
- if (!ep)
- goto autoconf_fail;
- fsg->bulk_out = ep;
-
- /* Assume endpoint addresses are the same for both speeds */
- fsg_hs_bulk_in_desc.bEndpointAddress =
- fsg_fs_bulk_in_desc.bEndpointAddress;
- fsg_hs_bulk_out_desc.bEndpointAddress =
- fsg_fs_bulk_out_desc.bEndpointAddress;
-
/* Calculate bMaxBurst, we know packet size is 1024 */
max_burst = min_t(unsigned, FSG_BUFLEN / 1024, 15);
-
- fsg_ss_bulk_in_desc.bEndpointAddress =
- fsg_fs_bulk_in_desc.bEndpointAddress;
fsg_ss_bulk_in_comp_desc.bMaxBurst = max_burst;
-
- fsg_ss_bulk_out_desc.bEndpointAddress =
- fsg_fs_bulk_out_desc.bEndpointAddress;
fsg_ss_bulk_out_comp_desc.bMaxBurst = max_burst;
- ret = usb_assign_descriptors(f, fsg_fs_function, fsg_hs_function,
- fsg_ss_function);
- if (ret)
- goto autoconf_fail;
-
- return 0;
-
-autoconf_fail:
- ERROR(fsg, "unable to autoconfigure all endpoints\n");
- i = -ENOTSUPP;
-fail:
- /* terminate the thread */
- if (fsg->common->state != FSG_STATE_TERMINATED) {
- raise_exception(fsg->common, FSG_STATE_EXIT);
- wait_for_completion(&fsg->common->thread_notifier);
- }
- return i;
+ return usb_function_set_descs(f, &fsg_descs);
}
/****************************** ALLOCATE FUNCTION *************************/
@@ -3125,8 +3094,6 @@ static void fsg_unbind(struct usb_configuration *c, struct usb_function *f)
/* FIXME: make interruptible or killable somehow? */
wait_event(common->fsg_wait, common->fsg != fsg);
}
-
- usb_free_all_descriptors(&fsg->function);
}
static inline struct fsg_lun_opts *to_fsg_lun_opts(struct config_item *item)
@@ -3529,11 +3496,11 @@ static struct usb_function *fsg_alloc(struct usb_function_instance *fi)
mutex_unlock(&opts->lock);
fsg->function.name = FSG_DRIVER_DESC;
- fsg->function.bind = fsg_bind;
+ fsg->function.prep_descs = fsg_prep_descs;
fsg->function.unbind = fsg_unbind;
fsg->function.setup = fsg_setup;
fsg->function.set_alt = fsg_set_alt;
- fsg->function.disable = fsg_disable;
+ fsg->function.clear_alt = fsg_clear_alt;
fsg->function.free_func = fsg_free;
fsg->common = common;
diff --git a/drivers/usb/gadget/function/storage_common.c b/drivers/usb/gadget/function/storage_common.c
index d626830..94f23814 100644
--- a/drivers/usb/gadget/function/storage_common.c
+++ b/drivers/usb/gadget/function/storage_common.c
@@ -70,15 +70,6 @@ struct usb_endpoint_descriptor fsg_fs_bulk_out_desc = {
};
EXPORT_SYMBOL_GPL(fsg_fs_bulk_out_desc);
-struct usb_descriptor_header *fsg_fs_function[] = {
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_fs_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
- NULL,
-};
-EXPORT_SYMBOL_GPL(fsg_fs_function);
-
-
/*
* USB 2.0 devices need to expose both high speed and full speed
* descriptors, unless they only run at full speed.
@@ -108,15 +99,6 @@ struct usb_endpoint_descriptor fsg_hs_bulk_out_desc = {
};
EXPORT_SYMBOL_GPL(fsg_hs_bulk_out_desc);
-
-struct usb_descriptor_header *fsg_hs_function[] = {
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_hs_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
- NULL,
-};
-EXPORT_SYMBOL_GPL(fsg_hs_function);
-
struct usb_endpoint_descriptor fsg_ss_bulk_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -153,17 +135,6 @@ struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc = {
};
EXPORT_SYMBOL_GPL(fsg_ss_bulk_out_comp_desc);
-struct usb_descriptor_header *fsg_ss_function[] = {
- (struct usb_descriptor_header *) &fsg_intf_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_in_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_in_comp_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_out_desc,
- (struct usb_descriptor_header *) &fsg_ss_bulk_out_comp_desc,
- NULL,
-};
-EXPORT_SYMBOL_GPL(fsg_ss_function);
-
-
/*-------------------------------------------------------------------------*/
/*
diff --git a/drivers/usb/gadget/function/storage_common.h b/drivers/usb/gadget/function/storage_common.h
index c3544e6..f5d9146 100644
--- a/drivers/usb/gadget/function/storage_common.h
+++ b/drivers/usb/gadget/function/storage_common.h
@@ -190,17 +190,14 @@ extern struct usb_interface_descriptor fsg_intf_desc;
extern struct usb_endpoint_descriptor fsg_fs_bulk_in_desc;
extern struct usb_endpoint_descriptor fsg_fs_bulk_out_desc;
-extern struct usb_descriptor_header *fsg_fs_function[];
extern struct usb_endpoint_descriptor fsg_hs_bulk_in_desc;
extern struct usb_endpoint_descriptor fsg_hs_bulk_out_desc;
-extern struct usb_descriptor_header *fsg_hs_function[];
extern struct usb_endpoint_descriptor fsg_ss_bulk_in_desc;
extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc;
extern struct usb_endpoint_descriptor fsg_ss_bulk_out_desc;
extern struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc;
-extern struct usb_descriptor_header *fsg_ss_function[];
void fsg_lun_close(struct fsg_lun *curlun);
int fsg_lun_open(struct fsg_lun *curlun, const char *filename);
--
1.9.1
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