[PATCH v4 35/43] usb: gadget: f_uac1: conversion to new API
From: Robert Baldyga
Date: Wed Feb 03 2016 - 07:45:10 EST
Generate descriptors in new format and attach them to USB function in
prep_descs(). Implement prep_vendor_descs() to supply class specific
descriptors. Change set_alt() implementation and implement clear_alt()
operation. Remove boilerplate code.
Signed-off-by: Robert Baldyga <r.baldyga@xxxxxxxxxxx>
---
drivers/usb/gadget/function/f_uac1.c | 134 +++++++++++++++--------------------
1 file changed, 58 insertions(+), 76 deletions(-)
diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c
index 6a2346b..2faf4e4 100644
--- a/drivers/usb/gadget/function/f_uac1.c
+++ b/drivers/usb/gadget/function/f_uac1.c
@@ -189,24 +189,17 @@ static struct uac_iso_endpoint_descriptor as_iso_out_desc = {
.wLockDelay = __constant_cpu_to_le16(1),
};
-static struct usb_descriptor_header *f_audio_desc[] = {
- (struct usb_descriptor_header *)&ac_interface_desc,
- (struct usb_descriptor_header *)&ac_header_desc,
+USB_COMPOSITE_ENDPOINT(ep_out, &as_out_ep_desc,
+ &as_out_ep_desc, NULL, NULL);
- (struct usb_descriptor_header *)&input_terminal_desc,
- (struct usb_descriptor_header *)&output_terminal_desc,
- (struct usb_descriptor_header *)&feature_unit_desc,
+USB_COMPOSITE_ALTSETTING(intf0alt0, &ac_interface_desc);
+USB_COMPOSITE_ALTSETTING(intf1alt0, &as_interface_alt_0_desc);
+USB_COMPOSITE_ALTSETTING(intf1alt1, &as_interface_alt_1_desc, &ep_out);
- (struct usb_descriptor_header *)&as_interface_alt_0_desc,
- (struct usb_descriptor_header *)&as_interface_alt_1_desc,
- (struct usb_descriptor_header *)&as_header_desc,
+USB_COMPOSITE_INTERFACE(intf0, &intf0alt0);
+USB_COMPOSITE_INTERFACE(intf1, &intf1alt0, &intf1alt1);
- (struct usb_descriptor_header *)&as_type_i_desc,
-
- (struct usb_descriptor_header *)&as_out_ep_desc,
- (struct usb_descriptor_header *)&as_iso_out_desc,
- NULL,
-};
+USB_COMPOSITE_DESCRIPTORS(uac1_descs, &intf0, &intf1);
enum {
STR_AC_IF,
@@ -573,7 +566,7 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
{
struct f_audio *audio = func_to_audio(f);
struct usb_composite_dev *cdev = f->config->cdev;
- struct usb_ep *out_ep = audio->out_ep;
+ struct usb_ep *out_ep;
struct usb_request *req;
struct f_uac1_opts *opts;
int req_buf_size, req_count, audio_buf_size;
@@ -588,11 +581,12 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
if (intf == 1) {
if (alt == 1) {
- err = config_ep_by_speed(cdev->gadget, f, out_ep);
- if (err)
- return err;
+ out_ep = usb_function_get_ep(f, intf, 0);
+ if (!out_ep)
+ return -ENODEV;
+
+ audio->out_ep = out_ep;
- usb_ep_enable(out_ep);
audio->copy_buf = f_audio_buffer_alloc(audio_buf_size);
if (IS_ERR(audio->copy_buf))
return -ENOMEM;
@@ -636,7 +630,8 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
return err;
}
-static void f_audio_disable(struct usb_function *f)
+static void f_audio_clear_alt(struct usb_function *f,
+ unsigned intf, unsigned alt)
{
return;
}
@@ -664,25 +659,11 @@ static void f_audio_build_desc(struct f_audio *audio)
}
/* audio function driver setup/binding */
-static int
-f_audio_bind(struct usb_configuration *c, struct usb_function *f)
+static int f_audio_prep_descs(struct usb_function *f)
{
- struct usb_composite_dev *cdev = c->cdev;
- struct f_audio *audio = func_to_audio(f);
+ struct usb_composite_dev *cdev = f->config->cdev;
struct usb_string *us;
- int status;
- struct usb_ep *ep = NULL;
- struct f_uac1_opts *audio_opts;
- audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst);
- audio->card.gadget = c->cdev->gadget;
- /* set up ASLA audio devices */
- if (!audio_opts->bound) {
- status = gaudio_setup(&audio->card);
- if (status < 0)
- return status;
- audio_opts->bound = true;
- }
us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1));
if (IS_ERR(us))
return PTR_ERR(us);
@@ -694,41 +675,47 @@ f_audio_bind(struct usb_configuration *c, struct usb_function *f)
as_interface_alt_0_desc.iInterface = us[STR_AS_IF_ALT0].id;
as_interface_alt_1_desc.iInterface = us[STR_AS_IF_ALT1].id;
+ return usb_function_set_descs(f, &uac1_descs);
+}
+
+static int f_audio_prep_vendor_descs(struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = f->config->cdev;
+ struct f_audio *audio = func_to_audio(f);
+ struct f_uac1_opts *audio_opts;
+ int status;
+
+ audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst);
+ audio->card.gadget = cdev->gadget;
+
+ /* set up ASLA audio devices */
+ if (!audio_opts->bound) {
+ status = gaudio_setup(&audio->card);
+ if (status < 0)
+ return status;
+ audio_opts->bound = true;
+ }
f_audio_build_desc(audio);
- /* allocate instance-specific interface IDs, and patch descriptors */
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- ac_interface_desc.bInterfaceNumber = status;
-
- status = usb_interface_id(c, f);
- if (status < 0)
- goto fail;
- as_interface_alt_0_desc.bInterfaceNumber = status;
- as_interface_alt_1_desc.bInterfaceNumber = status;
-
- status = -ENODEV;
-
- /* allocate instance-specific endpoints */
- ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc);
- if (!ep)
- goto fail;
- audio->out_ep = ep;
- audio->out_ep->desc = &as_out_ep_desc;
-
- status = -ENOMEM;
-
- /* copy descriptors, and track endpoint copies */
- status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL);
- if (status)
- goto fail;
- return 0;
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&ac_header_desc);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&input_terminal_desc);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&output_terminal_desc);
+ usb_altset_add_vendor_desc(f, 0, 0,
+ (struct usb_descriptor_header *)&feature_unit_desc);
-fail:
- gaudio_cleanup(&audio->card);
- return status;
+ usb_altset_add_vendor_desc(f, 1, 1,
+ (struct usb_descriptor_header *)&as_header_desc);
+ usb_altset_add_vendor_desc(f, 1, 1,
+ (struct usb_descriptor_header *)&as_type_i_desc);
+
+ usb_ep_add_vendor_desc(f, 1, 1, 0,
+ (struct usb_descriptor_header *)&as_iso_out_desc);
+
+ return 0;
}
/*-------------------------------------------------------------------------*/
@@ -938,11 +925,6 @@ static void f_audio_free(struct usb_function *f)
mutex_unlock(&opts->lock);
}
-static void f_audio_unbind(struct usb_configuration *c, struct usb_function *f)
-{
- usb_free_all_descriptors(f);
-}
-
static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
{
struct f_audio *audio;
@@ -962,11 +944,11 @@ static struct usb_function *f_audio_alloc(struct usb_function_instance *fi)
INIT_LIST_HEAD(&audio->play_queue);
spin_lock_init(&audio->lock);
- audio->card.func.bind = f_audio_bind;
- audio->card.func.unbind = f_audio_unbind;
+ audio->card.func.prep_descs = f_audio_prep_descs;
+ audio->card.func.prep_vendor_descs = f_audio_prep_vendor_descs;
audio->card.func.set_alt = f_audio_set_alt;
+ audio->card.func.clear_alt = f_audio_clear_alt;
audio->card.func.setup = f_audio_setup;
- audio->card.func.disable = f_audio_disable;
audio->card.func.free_func = f_audio_free;
control_selector_init(audio);
--
1.9.1