[RFC PATCH 5/5] usb: gadget: f_uac1: add capture support
From: Ruslan Bilovol
Date: Mon May 23 2016 - 19:51:12 EST
Add capture support (gadget->host) to the f_uac1
driver. This requires renaming of some descriptors,
enums etc that were used exclusively for playback
path. To make it meaningful, f_uac2 driver naming
convention has been used.
By default, capture interface has 48000kHz/2ch
configuration, same as playback channel has.
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@xxxxxxxxx>
---
drivers/usb/gadget/Kconfig | 7 +-
drivers/usb/gadget/function/f_uac1.c | 265 ++++++++++++++++++++++++++++-------
drivers/usb/gadget/function/u_uac1.h | 6 +
drivers/usb/gadget/legacy/audio.c | 18 +++
4 files changed, 239 insertions(+), 57 deletions(-)
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index fd6ee1d..ffe611a 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -395,10 +395,11 @@ config USB_CONFIGFS_F_UAC1
This Audio function implements 1 AudioControl interface,
1 AudioStreaming Interface each for USB-OUT and USB-IN.
This driver doesn't expect any real Audio codec to be present
- on the device - the audio streams are simply sinked to
- a virtual ALSA sound card created. The user-space
+ on the device - the audio streams are simply sinked to and
+ sourced from a virtual ALSA sound card created. The user-space
application may choose to do whatever it wants with the data
- received from the USB Host.
+ received from the USB Host and choose to provide whatever it
+ wants as audio data to the USB Host.
config USB_CONFIGFS_F_UAC2
bool "Audio Class 2.0"
diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c
index 120bba9..fcbf204 100644
--- a/drivers/usb/gadget/function/f_uac1.c
+++ b/drivers/usb/gadget/function/f_uac1.c
@@ -22,8 +22,8 @@
struct f_uac1 {
struct gaudio gaudio;
- u8 ac_intf, as_out_intf;
- u8 ac_alt, as_out_alt; /* needed for get_alt() */
+ u8 ac_intf, as_in_intf, as_out_intf;
+ u8 ac_alt, as_in_alt, as_out_alt; /* needed for get_alt() */
};
static inline struct f_uac1 *func_to_uac1(struct usb_function *f)
@@ -37,12 +37,17 @@ static inline struct f_uac1 *func_to_uac1(struct usb_function *f)
*/
/*
- * We have two interfaces- AudioControl and AudioStreaming
- * TODO: only supcard playback currently
+ * We have three interfaces- AudioControl and 2 AudioStreaming
+ *
+ * The driver implements a simple UAC_1 topology.
+ * USB-OUT -> IT_1 -> OT_2 -> ALSA_Capture
+ * ALSA_Playback -> IT_3 -> OT_4 -> USB-IN
*/
-#define F_AUDIO_AC_INTERFACE 0
-#define F_AUDIO_AS_INTERFACE 1
-#define F_AUDIO_NUM_INTERFACES 1
+#define F_AUDIO_AC_INTERFACE 0
+#define F_AUDIO_AS_OUT_INTERFACE 1
+#define F_AUDIO_AS_IN_INTERFACE 2
+/* Number of streaming interfaces */
+#define F_AUDIO_NUM_INTERFACES 2
/* B.3.1 Standard AC Interface Descriptor */
static struct usb_interface_descriptor ac_interface_desc = {
@@ -57,14 +62,14 @@ static struct usb_interface_descriptor ac_interface_desc = {
* The number of AudioStreaming and MIDIStreaming interfaces
* in the Audio Interface Collection
*/
-DECLARE_UAC_AC_HEADER_DESCRIPTOR(1);
+DECLARE_UAC_AC_HEADER_DESCRIPTOR(2);
#define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES)
-/* 1 input terminal and 1 output terminal */
-#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \
- + UAC_DT_OUTPUT_TERMINAL_SIZE)
+/* 2 input terminals and 2 output terminals */
+#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH \
+ + 2*UAC_DT_INPUT_TERMINAL_SIZE + 2*UAC_DT_OUTPUT_TERMINAL_SIZE)
/* B.3.2 Class-Specific AC Interface Descriptor */
-static struct uac1_ac_header_descriptor_1 ac_header_desc = {
+static struct uac1_ac_header_descriptor_2 ac_header_desc = {
.bLength = UAC_DT_AC_HEADER_LENGTH,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubtype = UAC_HEADER,
@@ -72,35 +77,76 @@ static struct uac1_ac_header_descriptor_1 ac_header_desc = {
.wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH),
.bInCollection = F_AUDIO_NUM_INTERFACES,
.baInterfaceNr = {
- /* Interface number of the first AudioStream interface */
+ /* Interface number of the AudioStream interfaces */
[0] = 1,
+ [1] = 2,
}
};
-#define INPUT_TERMINAL_ID 1
-static struct uac_input_terminal_descriptor input_terminal_desc = {
+#define USB_OUT_IT_ID 1
+static struct uac_input_terminal_descriptor usb_out_it_desc = {
.bLength = UAC_DT_INPUT_TERMINAL_SIZE,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubtype = UAC_INPUT_TERMINAL,
- .bTerminalID = INPUT_TERMINAL_ID,
+ .bTerminalID = USB_OUT_IT_ID,
.wTerminalType = UAC_TERMINAL_STREAMING,
.bAssocTerminal = 0,
.wChannelConfig = 0x3,
};
-#define OUTPUT_TERMINAL_ID 2
-static struct uac1_output_terminal_descriptor output_terminal_desc = {
+#define IO_OUT_OT_ID 2
+static struct uac1_output_terminal_descriptor io_out_ot_desc = {
.bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
- .bTerminalID = OUTPUT_TERMINAL_ID,
+ .bTerminalID = IO_OUT_OT_ID,
.wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER,
.bAssocTerminal = 0,
- .bSourceID = INPUT_TERMINAL_ID,
+ .bSourceID = USB_OUT_IT_ID,
+};
+
+#define IO_IN_IT_ID 3
+static struct uac_input_terminal_descriptor io_in_it_desc = {
+ .bLength = UAC_DT_INPUT_TERMINAL_SIZE,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_INPUT_TERMINAL,
+ .bTerminalID = IO_IN_IT_ID,
+ .wTerminalType = UAC_INPUT_TERMINAL_MICROPHONE,
+ .bAssocTerminal = 0,
+ .wChannelConfig = 0x3,
+};
+
+#define USB_IN_OT_ID 4
+static struct uac1_output_terminal_descriptor usb_in_ot_desc = {
+ .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
+ .bTerminalID = USB_IN_OT_ID,
+ .wTerminalType = UAC_TERMINAL_STREAMING,
+ .bAssocTerminal = 0,
+ .bSourceID = IO_IN_IT_ID,
};
/* B.4.1 Standard AS Interface Descriptor */
-static struct usb_interface_descriptor as_interface_alt_0_desc = {
+static struct usb_interface_descriptor as_out_interface_alt_0_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 0,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
+};
+
+static struct usb_interface_descriptor as_out_interface_alt_1_desc = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_AUDIO,
+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
+};
+
+static struct usb_interface_descriptor as_in_interface_alt_0_desc = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bAlternateSetting = 0,
@@ -109,7 +155,7 @@ static struct usb_interface_descriptor as_interface_alt_0_desc = {
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
};
-static struct usb_interface_descriptor as_interface_alt_1_desc = {
+static struct usb_interface_descriptor as_in_interface_alt_1_desc = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bAlternateSetting = 1,
@@ -119,18 +165,27 @@ static struct usb_interface_descriptor as_interface_alt_1_desc = {
};
/* B.4.2 Class-Specific AS Interface Descriptor */
-static struct uac1_as_header_descriptor as_header_desc = {
+static struct uac1_as_header_descriptor as_out_header_desc = {
.bLength = UAC_DT_AS_HEADER_SIZE,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubtype = UAC_AS_GENERAL,
- .bTerminalLink = INPUT_TERMINAL_ID,
+ .bTerminalLink = USB_OUT_IT_ID,
+ .bDelay = 1,
+ .wFormatTag = UAC_FORMAT_TYPE_I_PCM,
+};
+
+static struct uac1_as_header_descriptor as_in_header_desc = {
+ .bLength = UAC_DT_AS_HEADER_SIZE,
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_AS_GENERAL,
+ .bTerminalLink = USB_IN_OT_ID,
.bDelay = 1,
.wFormatTag = UAC_FORMAT_TYPE_I_PCM,
};
DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1);
-static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = {
+static struct uac_format_type_i_discrete_descriptor_1 as_out_type_i_desc = {
.bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1),
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubtype = UAC_FORMAT_TYPE,
@@ -161,40 +216,92 @@ static struct uac_iso_endpoint_descriptor as_iso_out_desc = {
.wLockDelay = __constant_cpu_to_le16(1),
};
+static struct uac_format_type_i_discrete_descriptor_1 as_in_type_i_desc = {
+ .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1),
+ .bDescriptorType = USB_DT_CS_INTERFACE,
+ .bDescriptorSubtype = UAC_FORMAT_TYPE,
+ .bFormatType = UAC_FORMAT_TYPE_I,
+ .bSubframeSize = 2,
+ .bBitResolution = 16,
+ .bSamFreqType = 1,
+};
+
+/* Standard ISO OUT Endpoint Descriptor */
+static struct usb_endpoint_descriptor as_in_ep_desc = {
+ .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_SYNC_ASYNC
+ | USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE),
+ .bInterval = 4,
+};
+
+/* Class-specific AS ISO OUT Endpoint Descriptor */
+static struct uac_iso_endpoint_descriptor as_iso_in_desc = {
+ .bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
+ .bDescriptorType = USB_DT_CS_ENDPOINT,
+ .bDescriptorSubtype = UAC_EP_GENERAL,
+ .bmAttributes = 1,
+ .bLockDelayUnits = 0,
+ .wLockDelay = 0,
+};
+
static struct usb_descriptor_header *f_audio_desc[] = {
(struct usb_descriptor_header *)&ac_interface_desc,
(struct usb_descriptor_header *)&ac_header_desc,
- (struct usb_descriptor_header *)&input_terminal_desc,
- (struct usb_descriptor_header *)&output_terminal_desc,
+ (struct usb_descriptor_header *)&usb_out_it_desc,
+ (struct usb_descriptor_header *)&io_out_ot_desc,
+ (struct usb_descriptor_header *)&io_in_it_desc,
+ (struct usb_descriptor_header *)&usb_in_ot_desc,
- (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,
+ (struct usb_descriptor_header *)&as_out_interface_alt_0_desc,
+ (struct usb_descriptor_header *)&as_out_interface_alt_1_desc,
+ (struct usb_descriptor_header *)&as_out_header_desc,
- (struct usb_descriptor_header *)&as_type_i_desc,
+ (struct usb_descriptor_header *)&as_out_type_i_desc,
(struct usb_descriptor_header *)&as_out_ep_desc,
(struct usb_descriptor_header *)&as_iso_out_desc,
+
+ (struct usb_descriptor_header *)&as_in_interface_alt_0_desc,
+ (struct usb_descriptor_header *)&as_in_interface_alt_1_desc,
+ (struct usb_descriptor_header *)&as_in_header_desc,
+
+ (struct usb_descriptor_header *)&as_in_type_i_desc,
+
+ (struct usb_descriptor_header *)&as_in_ep_desc,
+ (struct usb_descriptor_header *)&as_iso_in_desc,
NULL,
};
enum {
STR_AC_IF,
- STR_INPUT_TERMINAL,
- STR_INPUT_TERMINAL_CH_NAMES,
- STR_OUTPUT_TERMINAL,
- STR_AS_IF_ALT0,
- STR_AS_IF_ALT1,
+ STR_USB_OUT_IT,
+ STR_USB_OUT_IT_CH_NAMES,
+ STR_IO_OUT_OT,
+ STR_IO_IN_IT,
+ STR_IO_IN_IT_CH_NAMES,
+ STR_USB_IN_OT,
+ STR_AS_OUT_IF_ALT0,
+ STR_AS_OUT_IF_ALT1,
+ STR_AS_IN_IF_ALT0,
+ STR_AS_IN_IF_ALT1,
};
static struct usb_string strings_uac1[] = {
[STR_AC_IF].s = "AC Interface",
- [STR_INPUT_TERMINAL].s = "Input terminal",
- [STR_INPUT_TERMINAL_CH_NAMES].s = "Channels",
- [STR_OUTPUT_TERMINAL].s = "Output terminal",
- [STR_AS_IF_ALT0].s = "AS Interface",
- [STR_AS_IF_ALT1].s = "AS Interface",
+ [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",
+ [STR_IO_IN_IT].s = "Capture Input terminal",
+ [STR_IO_IN_IT_CH_NAMES].s = "Capture Channels",
+ [STR_USB_IN_OT].s = "Capture Output terminal",
+ [STR_AS_OUT_IF_ALT0].s = "Playback Inactive",
+ [STR_AS_OUT_IF_ALT1].s = "Playback Active",
+ [STR_AS_IN_IF_ALT0].s = "Capture Inactive",
+ [STR_AS_IN_IF_ALT1].s = "Capture Active",
{ },
};
@@ -350,6 +457,13 @@ static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
ret = gaudio_start_capture(&uac1->gaudio);
else
gaudio_stop_capture(&uac1->gaudio);
+ } else if (intf == uac1->as_in_intf) {
+ uac1->as_in_alt = alt;
+
+ if (alt)
+ ret = gaudio_start_playback(&uac1->gaudio);
+ else
+ gaudio_stop_playback(&uac1->gaudio);
} else {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
return -EINVAL;
@@ -369,6 +483,8 @@ static int f_audio_get_alt(struct usb_function *f, unsigned intf)
return uac1->ac_alt;
else if (intf == uac1->as_out_intf)
return uac1->as_out_alt;
+ else if (intf == uac1->as_in_intf)
+ return uac1->as_in_alt;
else
dev_err(dev, "%s:%d Invalid Interface %d!\n",
__func__, __LINE__, intf);
@@ -382,6 +498,7 @@ static void f_audio_disable(struct usb_function *f)
struct f_uac1 *uac1 = func_to_uac1(f);
uac1->as_out_alt = 0;
+ uac1->as_in_alt = 0;
gaudio_stop_capture(&uac1->gaudio);
}
@@ -408,22 +525,35 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
if (IS_ERR(us))
return PTR_ERR(us);
ac_interface_desc.iInterface = us[STR_AC_IF].id;
- input_terminal_desc.iTerminal = us[STR_INPUT_TERMINAL].id;
- input_terminal_desc.iChannelNames = us[STR_INPUT_TERMINAL_CH_NAMES].id;
- output_terminal_desc.iTerminal = us[STR_OUTPUT_TERMINAL].id;
- as_interface_alt_0_desc.iInterface = us[STR_AS_IF_ALT0].id;
- as_interface_alt_1_desc.iInterface = us[STR_AS_IF_ALT1].id;
+ usb_out_it_desc.iTerminal = us[STR_USB_OUT_IT].id;
+ usb_out_it_desc.iChannelNames = us[STR_USB_OUT_IT_CH_NAMES].id;
+ io_out_ot_desc.iTerminal = us[STR_IO_OUT_OT].id;
+ as_out_interface_alt_0_desc.iInterface = us[STR_AS_OUT_IF_ALT0].id;
+ as_out_interface_alt_1_desc.iInterface = us[STR_AS_OUT_IF_ALT1].id;
+ io_in_it_desc.iTerminal = us[STR_IO_IN_IT].id;
+ io_in_it_desc.iChannelNames = us[STR_IO_IN_IT_CH_NAMES].id;
+ usb_in_ot_desc.iTerminal = us[STR_USB_IN_OT].id;
+ as_in_interface_alt_0_desc.iInterface = us[STR_AS_IN_IF_ALT0].id;
+ as_in_interface_alt_1_desc.iInterface = us[STR_AS_IN_IF_ALT1].id;
/* Set channel numbers */
- input_terminal_desc.bNrChannels = num_channels(audio_opts->c_chmask);
- input_terminal_desc.wChannelConfig = cpu_to_le16(audio_opts->c_chmask);
- as_type_i_desc.bNrChannels = num_channels(audio_opts->c_chmask);
- as_type_i_desc.bSubframeSize = audio_opts->c_ssize;
- as_type_i_desc.bBitResolution = audio_opts->c_ssize * 8;
+ usb_out_it_desc.bNrChannels = num_channels(audio_opts->c_chmask);
+ usb_out_it_desc.wChannelConfig = cpu_to_le16(audio_opts->c_chmask);
+ as_out_type_i_desc.bNrChannels = num_channels(audio_opts->c_chmask);
+ as_out_type_i_desc.bSubframeSize = audio_opts->c_ssize;
+ as_out_type_i_desc.bBitResolution = audio_opts->c_ssize * 8;
+ io_in_it_desc.bNrChannels = num_channels(audio_opts->p_chmask);
+ io_in_it_desc.wChannelConfig = cpu_to_le16(audio_opts->p_chmask);
+ as_in_type_i_desc.bNrChannels = num_channels(audio_opts->p_chmask);
+ as_in_type_i_desc.bSubframeSize = audio_opts->p_ssize;
+ as_in_type_i_desc.bBitResolution = audio_opts->p_ssize * 8;
/* Set sample rates */
rate = audio_opts->c_srate;
- sam_freq = as_type_i_desc.tSamFreq[0];
+ sam_freq = as_out_type_i_desc.tSamFreq[0];
+ memcpy(sam_freq, &rate, 3);
+ rate = audio_opts->p_srate;
+ sam_freq = as_in_type_i_desc.tSamFreq[0];
memcpy(sam_freq, &rate, 3);
/* allocate instance-specific interface IDs, and patch descriptors */
@@ -437,11 +567,19 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
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;
+ as_out_interface_alt_0_desc.bInterfaceNumber = status;
+ as_out_interface_alt_1_desc.bInterfaceNumber = status;
uac1->as_out_intf = status;
uac1->as_out_alt = 0;
+ status = usb_interface_id(c, f);
+ if (status < 0)
+ goto fail;
+ as_in_interface_alt_0_desc.bInterfaceNumber = status;
+ as_in_interface_alt_1_desc.bInterfaceNumber = status;
+ uac1->as_in_intf = status;
+ uac1->as_in_alt = 0;
+
audio->gadget = gadget;
status = -ENODEV;
@@ -453,6 +591,12 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
audio->out_ep = ep;
audio->out_ep->desc = &as_out_ep_desc;
+ ep = usb_ep_autoconfig(cdev->gadget, &as_in_ep_desc);
+ if (!ep)
+ goto fail;
+ audio->in_ep = ep;
+ audio->in_ep->desc = &as_in_ep_desc;
+
/* copy descriptors, and track endpoint copies */
status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL,
NULL);
@@ -460,9 +604,13 @@ static int f_audio_bind(struct usb_configuration *c, struct usb_function *f)
goto fail;
audio->out_ep_maxpsize = as_out_ep_desc.wMaxPacketSize;
+ audio->in_ep_maxpsize = as_in_ep_desc.wMaxPacketSize;
audio->params.c_chmask = audio_opts->c_chmask;
audio->params.c_srate = audio_opts->c_srate;
audio->params.c_ssize = audio_opts->c_ssize;
+ audio->params.p_chmask = audio_opts->p_chmask;
+ audio->params.p_srate = audio_opts->p_srate;
+ audio->params.p_ssize = audio_opts->p_ssize;
status = gaudio_setup(audio, "UAC1_PCM", "UAC1_Gadget");
if (status)
@@ -539,11 +687,17 @@ CONFIGFS_ATTR(f_uac1_opts_, name)
UAC1_ATTRIBUTE(c_chmask);
UAC1_ATTRIBUTE(c_srate);
UAC1_ATTRIBUTE(c_ssize);
+UAC1_ATTRIBUTE(p_chmask);
+UAC1_ATTRIBUTE(p_srate);
+UAC1_ATTRIBUTE(p_ssize);
static struct configfs_attribute *f_uac1_attrs[] = {
&f_uac1_opts_attr_c_chmask,
&f_uac1_opts_attr_c_srate,
&f_uac1_opts_attr_c_ssize,
+ &f_uac1_opts_attr_p_chmask,
+ &f_uac1_opts_attr_p_srate,
+ &f_uac1_opts_attr_p_ssize,
NULL,
};
@@ -578,6 +732,9 @@ static struct usb_function_instance *f_audio_alloc_inst(void)
opts->c_chmask = UAC1_DEF_CCHMASK;
opts->c_srate = UAC1_DEF_CSRATE;
opts->c_ssize = UAC1_DEF_CSSIZE;
+ opts->p_chmask = UAC1_DEF_PCHMASK;
+ opts->p_srate = UAC1_DEF_PSRATE;
+ opts->p_ssize = UAC1_DEF_PSSIZE;
return &opts->func_inst;
}
diff --git a/drivers/usb/gadget/function/u_uac1.h b/drivers/usb/gadget/function/u_uac1.h
index fb871d6..3ce7451 100644
--- a/drivers/usb/gadget/function/u_uac1.h
+++ b/drivers/usb/gadget/function/u_uac1.h
@@ -21,6 +21,9 @@
#define UAC1_DEF_CCHMASK 0x3
#define UAC1_DEF_CSRATE 48000
#define UAC1_DEF_CSSIZE 2
+#define UAC1_DEF_PCHMASK 0x3
+#define UAC1_DEF_PSRATE 48000
+#define UAC1_DEF_PSSIZE 2
struct f_uac1_opts {
@@ -28,6 +31,9 @@ struct f_uac1_opts {
int c_chmask;
int c_srate;
int c_ssize;
+ int p_chmask;
+ int p_srate;
+ int p_ssize;
unsigned bound:1;
struct mutex lock;
diff --git a/drivers/usb/gadget/legacy/audio.c b/drivers/usb/gadget/legacy/audio.c
index 84cce80..0211c07 100644
--- a/drivers/usb/gadget/legacy/audio.c
+++ b/drivers/usb/gadget/legacy/audio.c
@@ -55,6 +55,21 @@ MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
#else
#include "u_uac1.h"
+/* Playback(USB-IN) Default Stereo - Fl/Fr */
+static int p_chmask = UAC1_DEF_PCHMASK;
+module_param(p_chmask, uint, S_IRUGO);
+MODULE_PARM_DESC(p_chmask, "Playback Channel Mask");
+
+/* Playback Default 48 KHz */
+static int p_srate = UAC1_DEF_PSRATE;
+module_param(p_srate, uint, S_IRUGO);
+MODULE_PARM_DESC(p_srate, "Playback Sampling Rate");
+
+/* Playback Default 16bits/sample */
+static int p_ssize = UAC1_DEF_PSSIZE;
+module_param(p_ssize, uint, S_IRUGO);
+MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)");
+
/* Capture(USB-OUT) Default Stereo - Fl/Fr */
static int c_chmask = UAC1_DEF_CCHMASK;
module_param(c_chmask, uint, S_IRUGO);
@@ -222,6 +237,9 @@ static int audio_bind(struct usb_composite_dev *cdev)
uac2_opts->c_ssize = c_ssize;
#else
uac1_opts = container_of(fi_uac1, struct f_uac1_opts, func_inst);
+ uac1_opts->p_chmask = p_chmask;
+ uac1_opts->p_srate = p_srate;
+ uac1_opts->p_ssize = p_ssize;
uac1_opts->c_chmask = c_chmask;
uac1_opts->c_srate = c_srate;
uac1_opts->c_ssize = c_ssize;
--
1.9.1