diff options
| -rw-r--r-- | Documentation/ABI/testing/configfs-usb-gadget-uac1 | 1 | ||||
| -rw-r--r-- | Documentation/usb/gadget-testing.rst | 1 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/f_uac1.c | 46 | ||||
| -rw-r--r-- | drivers/usb/gadget/function/u_uac1.h | 2 |
4 files changed, 49 insertions, 1 deletions
diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uac1 b/Documentation/ABI/testing/configfs-usb-gadget-uac1 index 09725e273e9b..c4ba92f004c3 100644 --- a/Documentation/ABI/testing/configfs-usb-gadget-uac1 +++ b/Documentation/ABI/testing/configfs-usb-gadget-uac1 @@ -29,4 +29,5 @@ Description: (in 1/256 dB) req_number the number of pre-allocated requests for both capture and playback + function_name name of the interface ===================== ======================================= diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst index 046842b00c89..1792bd88f666 100644 --- a/Documentation/usb/gadget-testing.rst +++ b/Documentation/usb/gadget-testing.rst @@ -745,6 +745,7 @@ The uac2 function provides these attributes in its function directory: p_volume_res playback volume control resolution (in 1/256 dB) req_number the number of pre-allocated request for both capture and playback + function_name name of the interface ================ ==================================================== The attributes have sane default values. diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c index 1484e5c231d3..6f0e1d803dc2 100644 --- a/drivers/usb/gadget/function/f_uac1.c +++ b/drivers/usb/gadget/function/f_uac1.c @@ -309,7 +309,7 @@ enum { }; static struct usb_string strings_uac1[] = { - [STR_AC_IF].s = "AC Interface", + /* [STR_AC_IF].s = DYNAMIC, */ [STR_USB_OUT_IT].s = "Playback Input terminal", [STR_USB_OUT_IT_CH_NAMES].s = "Playback Channels", [STR_IO_OUT_OT].s = "Playback Output terminal", @@ -1192,6 +1192,8 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f) audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst); + strings_uac1[STR_AC_IF].s = audio_opts->function_name; + us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1)); if (IS_ERR(us)) return PTR_ERR(us); @@ -1551,6 +1553,42 @@ end: \ \ CONFIGFS_ATTR(f_uac1_opts_, name) +#define UAC1_ATTRIBUTE_STRING(name) \ +static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \ + char *page) \ +{ \ + struct f_uac1_opts *opts = to_f_uac1_opts(item); \ + int result; \ + \ + mutex_lock(&opts->lock); \ + result = snprintf(page, sizeof(opts->name), "%s", opts->name); \ + mutex_unlock(&opts->lock); \ + \ + return result; \ +} \ + \ +static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ + const char *page, size_t len) \ +{ \ + struct f_uac1_opts *opts = to_f_uac1_opts(item); \ + int ret = 0; \ + \ + mutex_lock(&opts->lock); \ + if (opts->refcnt) { \ + ret = -EBUSY; \ + goto end; \ + } \ + \ + ret = snprintf(opts->name, min(sizeof(opts->name), len), \ + "%s", page); \ + \ +end: \ + mutex_unlock(&opts->lock); \ + return ret; \ +} \ + \ +CONFIGFS_ATTR(f_uac1_opts_, name) + UAC1_ATTRIBUTE(u32, c_chmask); UAC1_RATE_ATTRIBUTE(c_srate); UAC1_ATTRIBUTE(u32, c_ssize); @@ -1570,6 +1608,7 @@ UAC1_ATTRIBUTE(bool, c_volume_present); UAC1_ATTRIBUTE(s16, c_volume_min); UAC1_ATTRIBUTE(s16, c_volume_max); UAC1_ATTRIBUTE(s16, c_volume_res); +UAC1_ATTRIBUTE_STRING(function_name); static struct configfs_attribute *f_uac1_attrs[] = { &f_uac1_opts_attr_c_chmask, @@ -1592,6 +1631,8 @@ static struct configfs_attribute *f_uac1_attrs[] = { &f_uac1_opts_attr_c_volume_max, &f_uac1_opts_attr_c_volume_res, + &f_uac1_opts_attr_function_name, + NULL, }; @@ -1643,6 +1684,9 @@ static struct usb_function_instance *f_audio_alloc_inst(void) opts->c_volume_res = UAC1_DEF_RES_DB; opts->req_number = UAC1_DEF_REQ_NUM; + + snprintf(opts->function_name, sizeof(opts->function_name), "AC Interface"); + return &opts->func_inst; } diff --git a/drivers/usb/gadget/function/u_uac1.h b/drivers/usb/gadget/function/u_uac1.h index b6cd6171d306..f7a616760e31 100644 --- a/drivers/usb/gadget/function/u_uac1.h +++ b/drivers/usb/gadget/function/u_uac1.h @@ -52,6 +52,8 @@ struct f_uac1_opts { int req_number; unsigned bound:1; + char function_name[32]; + struct mutex lock; int refcnt; }; |