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-rw-r--r--Documentation/ABI/testing/configfs-usb-gadget-uac21
-rw-r--r--Documentation/usb/gadget-testing.rst1
-rw-r--r--drivers/usb/gadget/function/f_uac2.c100
-rw-r--r--drivers/usb/gadget/function/u_uac2.h2
4 files changed, 95 insertions, 9 deletions
diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uac2 b/Documentation/ABI/testing/configfs-usb-gadget-uac2
index d4356c8b8cd6..e7e59d7fb12f 100644
--- a/Documentation/ABI/testing/configfs-usb-gadget-uac2
+++ b/Documentation/ABI/testing/configfs-usb-gadget-uac2
@@ -8,6 +8,7 @@ Description:
c_chmask capture channel mask
c_srate capture sampling rate
c_ssize capture sample size (bytes)
+ c_sync capture synchronization type (async/adaptive)
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst
index 2085e7b24eeb..f5a12667bd41 100644
--- a/Documentation/usb/gadget-testing.rst
+++ b/Documentation/usb/gadget-testing.rst
@@ -728,6 +728,7 @@ The uac2 function provides these attributes in its function directory:
c_chmask capture channel mask
c_srate capture sampling rate
c_ssize capture sample size (bytes)
+ c_sync capture synchronization type (async/adaptive)
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index 5d63244ba319..321e6c05ba93 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -44,6 +44,7 @@
#define EPIN_EN(_opts) ((_opts)->p_chmask != 0)
#define EPOUT_EN(_opts) ((_opts)->c_chmask != 0)
+#define EPOUT_FBACK_IN_EN(_opts) ((_opts)->c_sync == USB_ENDPOINT_SYNC_ASYNC)
struct f_uac2 {
struct g_audio g_audio;
@@ -240,7 +241,7 @@ static struct usb_interface_descriptor std_as_out_if1_desc = {
.bDescriptorType = USB_DT_INTERFACE,
.bAlternateSetting = 1,
- .bNumEndpoints = 2,
+ .bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_AUDIO,
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
.bInterfaceProtocol = UAC_VERSION_2,
@@ -273,7 +274,7 @@ static struct usb_endpoint_descriptor fs_epout_desc = {
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ /* .bmAttributes = DYNAMIC */
/* .wMaxPacketSize = DYNAMIC */
.bInterval = 1,
};
@@ -282,7 +283,7 @@ static struct usb_endpoint_descriptor hs_epout_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ /* .bmAttributes = DYNAMIC */
/* .wMaxPacketSize = DYNAMIC */
.bInterval = 4,
};
@@ -292,7 +293,7 @@ static struct usb_endpoint_descriptor ss_epout_desc = {
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
+ /* .bmAttributes = DYNAMIC */
/* .wMaxPacketSize = DYNAMIC */
.bInterval = 4,
};
@@ -649,7 +650,9 @@ static void setup_headers(struct f_uac2_opts *opts,
headers[i++] = USBDHDR(epout_desc_comp);
headers[i++] = USBDHDR(&as_iso_out_desc);
- headers[i++] = USBDHDR(epin_fback_desc);
+
+ if (EPOUT_FBACK_IN_EN(opts))
+ headers[i++] = USBDHDR(epin_fback_desc);
}
if (EPIN_EN(opts)) {
headers[i++] = USBDHDR(&std_as_in_if0_desc);
@@ -820,6 +823,23 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
std_as_out_if1_desc.bInterfaceNumber = ret;
uac2->as_out_intf = ret;
uac2->as_out_alt = 0;
+
+ if (EPOUT_FBACK_IN_EN(uac2_opts)) {
+ fs_epout_desc.bmAttributes =
+ USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC;
+ hs_epout_desc.bmAttributes =
+ USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC;
+ ss_epout_desc.bmAttributes =
+ USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC;
+ std_as_out_if1_desc.bNumEndpoints++;
+ } else {
+ fs_epout_desc.bmAttributes =
+ USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE;
+ hs_epout_desc.bmAttributes =
+ USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE;
+ ss_epout_desc.bmAttributes =
+ USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE;
+ }
}
if (EPIN_EN(uac2_opts)) {
@@ -883,11 +903,14 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
return -ENODEV;
}
- agdev->in_ep_fback = usb_ep_autoconfig(gadget,
+ if (EPOUT_FBACK_IN_EN(uac2_opts)) {
+ agdev->in_ep_fback = usb_ep_autoconfig(gadget,
&fs_epin_fback_desc);
- if (!agdev->in_ep_fback) {
- dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
- return -ENODEV;
+ if (!agdev->in_ep_fback) {
+ dev_err(dev, "%s:%d Error!\n",
+ __func__, __LINE__);
+ return -ENODEV;
+ }
}
}
@@ -1242,11 +1265,68 @@ end: \
\
CONFIGFS_ATTR(f_uac2_opts_, name)
+#define UAC2_ATTRIBUTE_SYNC(name) \
+static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \
+ char *page) \
+{ \
+ struct f_uac2_opts *opts = to_f_uac2_opts(item); \
+ int result; \
+ char *str; \
+ \
+ mutex_lock(&opts->lock); \
+ switch (opts->name) { \
+ case USB_ENDPOINT_SYNC_ASYNC: \
+ str = "async"; \
+ break; \
+ case USB_ENDPOINT_SYNC_ADAPTIVE: \
+ str = "adaptive"; \
+ break; \
+ default: \
+ str = "unknown"; \
+ break; \
+ } \
+ result = sprintf(page, "%s\n", str); \
+ mutex_unlock(&opts->lock); \
+ \
+ return result; \
+} \
+ \
+static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \
+ const char *page, size_t len) \
+{ \
+ struct f_uac2_opts *opts = to_f_uac2_opts(item); \
+ int ret = 0; \
+ \
+ mutex_lock(&opts->lock); \
+ if (opts->refcnt) { \
+ ret = -EBUSY; \
+ goto end; \
+ } \
+ \
+ if (!strncmp(page, "async", 5)) \
+ opts->name = USB_ENDPOINT_SYNC_ASYNC; \
+ else if (!strncmp(page, "adaptive", 8)) \
+ opts->name = USB_ENDPOINT_SYNC_ADAPTIVE; \
+ else { \
+ ret = -EINVAL; \
+ goto end; \
+ } \
+ \
+ ret = len; \
+ \
+end: \
+ mutex_unlock(&opts->lock); \
+ return ret; \
+} \
+ \
+CONFIGFS_ATTR(f_uac2_opts_, name)
+
UAC2_ATTRIBUTE(p_chmask);
UAC2_ATTRIBUTE(p_srate);
UAC2_ATTRIBUTE(p_ssize);
UAC2_ATTRIBUTE(c_chmask);
UAC2_ATTRIBUTE(c_srate);
+UAC2_ATTRIBUTE_SYNC(c_sync);
UAC2_ATTRIBUTE(c_ssize);
UAC2_ATTRIBUTE(req_number);
@@ -1257,6 +1337,7 @@ static struct configfs_attribute *f_uac2_attrs[] = {
&f_uac2_opts_attr_c_chmask,
&f_uac2_opts_attr_c_srate,
&f_uac2_opts_attr_c_ssize,
+ &f_uac2_opts_attr_c_sync,
&f_uac2_opts_attr_req_number,
NULL,
};
@@ -1295,6 +1376,7 @@ static struct usb_function_instance *afunc_alloc_inst(void)
opts->c_chmask = UAC2_DEF_CCHMASK;
opts->c_srate = UAC2_DEF_CSRATE;
opts->c_ssize = UAC2_DEF_CSSIZE;
+ opts->c_sync = UAC2_DEF_CSYNC;
opts->req_number = UAC2_DEF_REQ_NUM;
return &opts->func_inst;
}
diff --git a/drivers/usb/gadget/function/u_uac2.h b/drivers/usb/gadget/function/u_uac2.h
index b5035711172d..13589c3c805c 100644
--- a/drivers/usb/gadget/function/u_uac2.h
+++ b/drivers/usb/gadget/function/u_uac2.h
@@ -21,6 +21,7 @@
#define UAC2_DEF_CCHMASK 0x3
#define UAC2_DEF_CSRATE 64000
#define UAC2_DEF_CSSIZE 2
+#define UAC2_DEF_CSYNC USB_ENDPOINT_SYNC_ASYNC
#define UAC2_DEF_REQ_NUM 2
struct f_uac2_opts {
@@ -31,6 +32,7 @@ struct f_uac2_opts {
int c_chmask;
int c_srate;
int c_ssize;
+ int c_sync;
int req_number;
bool bound;
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