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tzpuFusionX/software/linux/kernel/drivers/usb/gadget/function/f_uac1.c

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/*
* f_audio.c -- USB Audio class function driver
*
* Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
* Copyright (C) 2008 Analog Devices, Inc
*
* Enter bugs at http://blackfin.uclinux.org/
*
* Licensed under the GPL-2 or later.
*/
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/atomic.h>
#include "u_uac1.h"
static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value);
static int generic_get_cmd(struct usb_audio_control *con, u8 cmd);
#define USB_OUT_IT_ID 1
#define IO_OUT_OT_ID 2
//#define USB_FU_ID 3
#define IO_IN_IT_ID 3
#define USB_IN_OT_ID 4
/*
* DESCRIPTORS ... most are static, but strings and full
* configuration descriptors are built on demand.
*/
/*
* We have three interfaces - one AudioControl and two 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
/* this two index for interface ,no id */
#define F_AUDIO_AS_OUT_INTERFACE 0
#define F_AUDIO_AS_IN_INTERFACE 1
/* 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 = {
.bLength = USB_DT_INTERFACE_SIZE,
.bDescriptorType = USB_DT_INTERFACE,
.bNumEndpoints = 0,
.bInterfaceClass = USB_CLASS_AUDIO,
.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
};
/*
* The number of AudioStreaming and MIDIStreaming interfaces
* in the Audio Interface Collection
*/
DECLARE_UAC_AC_HEADER_DESCRIPTOR(1);
#define UAC_DT_AC_HEADER_LENGTH_1 UAC_DT_AC_HEADER_SIZE(1)
/* 1 input terminal, 1 output terminal */
#define UAC_DT_TOTAL_LENGTH_1 (UAC_DT_AC_HEADER_LENGTH_1 \
+ UAC_DT_INPUT_TERMINAL_SIZE + UAC_DT_OUTPUT_TERMINAL_SIZE)
/* B.3.2 Class-Specific AC Interface Descriptor */
static struct uac1_ac_header_descriptor_1 ac_header_desc_1 = {
.bLength = UAC_DT_AC_HEADER_LENGTH_1,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubtype = UAC_HEADER,
.bcdADC = cpu_to_le16(0x0100),
.wTotalLength = cpu_to_le16(UAC_DT_TOTAL_LENGTH_1),
.bInCollection = 1,
.baInterfaceNr = {
/* Interface number of the first AudioStream interface */
/*
[0] = F_AUDIO_AS_OUT_INTERFACE / F_AUDIO_AS_IN_INTERFACE,
*/
}
};
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
DECLARE_UAC_AC_HEADER_DESCRIPTOR(2);
#define UAC_DT_AC_HEADER_LENGTH_2 UAC_DT_AC_HEADER_SIZE(2)
/* 2 input terminal, 2 output terminal */
#define UAC_DT_TOTAL_LENGTH_2 (UAC_DT_AC_HEADER_LENGTH_2 \
+ 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_2 ac_header_desc_2 = {
.bLength = UAC_DT_AC_HEADER_LENGTH_2,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bDescriptorSubtype = UAC_HEADER,
.bcdADC = cpu_to_le16(0x0100),
.wTotalLength = cpu_to_le16(UAC_DT_TOTAL_LENGTH_2),
.bInCollection = 2,
.baInterfaceNr = {
/* Interface number of the first AudioStream interface */
/*
[0] = F_AUDIO_AS_OUT_INTERFACE,
[1] = F_AUDIO_AS_IN_INTERFACE,
*/
}
};
#endif
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 = USB_OUT_IT_ID,
.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
.bAssocTerminal = IO_OUT_OT_ID,
.wChannelConfig = cpu_to_le16(0x3),
};
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 = IO_OUT_OT_ID,
.wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER),
.bAssocTerminal = USB_OUT_IT_ID,
.bSourceID = USB_OUT_IT_ID,
};
/* add more control dynamically */
static struct usb_audio_control playback_mute_control = {
.list = LIST_HEAD_INIT(playback_mute_control.list),
.name = "Playback Mute Control",
.type = UAC_FU_MUTE,
/* Todo: add real Mute control code */
.set = generic_set_cmd,
.get = generic_get_cmd,
};
static struct usb_audio_control playback_volume_control = {
.list = LIST_HEAD_INIT(playback_volume_control.list),
.name = "Playback Volume Control",
.type = UAC_FU_VOLUME,
/* Todo: add real Volume control code */
.set = generic_set_cmd,
.get = generic_get_cmd,
};
static struct usb_audio_control playback_sample_freq_control = {
.list = LIST_HEAD_INIT(playback_sample_freq_control.list),
.name = "Playback Sampling Frequency Control",
.type = UAC_EP_CS_ATTR_SAMPLE_RATE,
.set = generic_set_cmd,
.get = generic_get_cmd,
};
static struct usb_audio_control_selector playback_fu_controls = {
.list = LIST_HEAD_INIT(playback_fu_controls.list),
.name = "Playback Function Unit Controls",
};
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
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 = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE),
.bAssocTerminal = USB_IN_OT_ID,
.wChannelConfig = cpu_to_le16(0x3),
};
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 = cpu_to_le16(UAC_TERMINAL_STREAMING),
.bAssocTerminal = IO_IN_IT_ID,
.bSourceID = IO_IN_IT_ID,
};
/* add more control dynamically */
static struct usb_audio_control capture_mute_control = {
.list = LIST_HEAD_INIT(capture_mute_control.list),
.name = "Capture Mute Control",
.type = UAC_FU_MUTE,
/* Todo: add real Mute control code */
.set = generic_set_cmd,
.get = generic_get_cmd,
};
static struct usb_audio_control capture_volume_control = {
.list = LIST_HEAD_INIT(capture_volume_control.list),
.name = "Capture Volume Control",
.type = UAC_FU_VOLUME,
/* Todo: add real Volume control code */
.set = generic_set_cmd,
.get = generic_get_cmd,
};
static struct usb_audio_control capture_sample_freq_control = {
.list = LIST_HEAD_INIT(capture_sample_freq_control.list),
.name = "Capture Sampling Frequency Control",
.type = UAC_EP_CS_ATTR_SAMPLE_RATE,
.set = generic_set_cmd,
.get = generic_get_cmd,
};
static struct usb_audio_control_selector capture_fu_controls = {
.list = LIST_HEAD_INIT(capture_fu_controls.list),
.name = "Capture Feature Unit Controls",
};
#endif
/* B.4.1 Standard AS Interface Descriptor */
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,
};
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
static struct usb_interface_descriptor as_in_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_in_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,
};
#endif
/* B.4.2 Class-Specific AS Interface Descriptor */
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 = USB_OUT_IT_ID,
.bDelay = 1,
.wFormatTag = cpu_to_le16(UAC_FORMAT_TYPE_I_PCM),
};
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
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 = cpu_to_le16(UAC_FORMAT_TYPE_I_PCM),
};
#endif
DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1);
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,
.bFormatType = UAC_FORMAT_TYPE_I,
.bSubframeSize = 2,
.bBitResolution = 16,
.bSamFreqType = 1,
};
/* Standard ISO OUT Endpoint Descriptor */
static struct usb_endpoint_descriptor as_out_ep_desc = {
.bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE
| USB_ENDPOINT_XFER_ISOC,
.bInterval = 4,
};
/* Class-specific AS ISO OUT Endpoint Descriptor */
static struct uac_iso_endpoint_descriptor as_iso_out_desc = {
.bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
.bDescriptorType = USB_DT_CS_ENDPOINT,
.bDescriptorSubtype = UAC_EP_GENERAL,
.bmAttributes = 1,
.bLockDelayUnits = 1,
.wLockDelay = __constant_cpu_to_le16(1),
};
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
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,
.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,
};
#endif
static struct usb_interface_assoc_descriptor
audio_iad_descriptor = {
.bLength = sizeof(audio_iad_descriptor),
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION,
.bFirstInterface = 0, /* updated at bind */
.bInterfaceCount = 3,
.bFunctionClass = USB_CLASS_AUDIO,
.bFunctionSubClass = 0,
.bFunctionProtocol = UAC_VERSION_1,
};
static struct usb_descriptor_header *f_audio_desc_0[] = {
(struct usb_descriptor_header *)&audio_iad_descriptor,
(struct usb_descriptor_header *)&ac_interface_desc,
(struct usb_descriptor_header *)&ac_header_desc_1,
(struct usb_descriptor_header *)&usb_out_it_desc,
(struct usb_descriptor_header *)&io_out_ot_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_out_type_i_desc,
(struct usb_descriptor_header *)&as_out_ep_desc,
(struct usb_descriptor_header *)&as_iso_out_desc,
NULL,
};
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
static struct usb_descriptor_header *f_audio_desc_1[] = {
(struct usb_descriptor_header *)&audio_iad_descriptor,
(struct usb_descriptor_header *)&ac_interface_desc,
(struct usb_descriptor_header *)&ac_header_desc_1,
(struct usb_descriptor_header *)&io_in_it_desc,
(struct usb_descriptor_header *)&usb_in_ot_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,
};
static struct usb_descriptor_header *f_audio_desc_2[] = {
(struct usb_descriptor_header *)&audio_iad_descriptor,
(struct usb_descriptor_header *)&ac_interface_desc,
(struct usb_descriptor_header *)&ac_header_desc_2,
(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_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_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,
};
#endif
enum {
STR_AC_IF,
STR_USB_OUT_IT,
STR_USB_OUT_IT_CH_NAMES,
STR_IO_OUT_OT,
STR_AS_OUT_IF_ALT0,
STR_AS_OUT_IF_ALT1,
STR_IO_IN_IT,
STR_IO_IN_IT_CH_NAMES,
STR_USB_IN_OT,
STR_AS_IN_IF_ALT0,
STR_AS_IN_IF_ALT1,
};
static struct usb_string strings_uac1[] = {
[STR_AC_IF].s = "AC 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_AS_OUT_IF_ALT0].s = "Playback Inactive",
[STR_AS_OUT_IF_ALT1].s = "Playback Active",
[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_IN_IF_ALT0].s = "Capture Inactive",
[STR_AS_IN_IF_ALT1].s = "Capture Active",
{ },
};
static struct usb_gadget_strings str_uac1 = {
.language = 0x0409, /* en-us */
.strings = strings_uac1,
};
static struct usb_gadget_strings *uac1_strings[] = {
&str_uac1,
NULL,
};
/*
* This function is an ALSA sound card following USB Audio Class Spec 1.0.
*/
/*-------------------------------------------------------------------------*/
struct f_audio_buf {
u8 *buf;
int actual;
struct list_head list;
};
static struct f_audio_buf *f_audio_buffer_alloc(int buf_size)
{
struct f_audio_buf *copy_buf;
copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC);
if (!copy_buf)
return ERR_PTR(-ENOMEM);
copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC);
if (!copy_buf->buf) {
kfree(copy_buf);
return ERR_PTR(-ENOMEM);
}
return copy_buf;
}
static void f_audio_buffer_free(struct f_audio_buf *audio_buf)
{
kfree(audio_buf->buf);
kfree(audio_buf);
}
/*-------------------------------------------------------------------------*/
struct f_audio {
struct gaudio card;
/* endpoints handle full and/or high speeds */
struct usb_ep *out_ep;
struct usb_ep *in_ep;
spinlock_t playback_lock;
spinlock_t capture_lock;
spinlock_t capture_req_lock;
struct f_audio_buf *playback_copy_buf;
struct work_struct playback_work;
struct work_struct capture_work;
struct list_head playback_play_queue;//store buf playback to audio
struct list_head capture_play_queue; //store buf capture from audio
struct list_head capture_req_free;//store req request, total in_req_count
u8 alt_intf[F_AUDIO_NUM_INTERFACES];
/* Control Set command */
struct list_head cs;
u8 set_cmd;
struct usb_audio_control *set_con;
};
static inline struct f_audio *func_to_audio(struct usb_function *f)
{
return container_of(f, struct f_audio, card.func);
}
static inline struct f_uac1_opts *fi_to_opts(const struct usb_function_instance *fi)
{
return container_of(fi,struct f_uac1_opts, func_inst);
}
static inline struct f_audio *capture_work_to_audio(struct work_struct *w)
{
return container_of(w, struct f_audio,capture_work);
}
/*-------------------------------------------------------------------------*/
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
static void f_audio_capture_work(struct work_struct *data)
{
struct usb_request *req = NULL;
struct f_audio *audio = capture_work_to_audio(data);
struct f_audio_buf *capture_buf,*copy_buf = NULL;
struct f_uac1_opts *opts = fi_to_opts(audio->card.func.fi);
int audio_capture_buf_size = opts->audio_capture_buf_size;
unsigned long flags, flags_req;
unsigned int copy_size, left_size, in_req_buf_size = opts->in_req_buf_size;
struct usb_ep *ep = audio->in_ep;
int res = 0, ret = 0;
pr_debug("%s Started\n", __func__);
/* disabe ep */
if (!audio->alt_intf[F_AUDIO_AS_IN_INTERFACE])
{
spin_lock_irqsave(&audio->capture_lock, flags);
while (!list_empty(&audio->capture_play_queue)) {
capture_buf = list_first_entry(
&audio->capture_play_queue,
struct f_audio_buf,list);
list_del(&capture_buf->list);
f_audio_buffer_free(capture_buf);
}
spin_unlock_irqrestore(&audio->capture_lock, flags);
spin_lock_irqsave(&audio->capture_req_lock, flags_req);
while (!list_empty(&audio->capture_req_free)) {
req = list_first_entry(&audio->capture_req_free, struct usb_request,list);
list_del(&req->list);
ret = usb_ep_queue(ep, req, GFP_ATOMIC);
if(ret < 0) {
spin_unlock_irqrestore(&audio->capture_req_lock, flags);
printk(KERN_INFO "Failed to queue request (%d).\n", ret);
return;
}
}
spin_unlock_irqrestore(&audio->capture_req_lock, flags);
return;
}
spin_lock_irqsave(&audio->capture_lock, flags);
if (!list_empty(&audio->capture_play_queue)) {
spin_unlock_irqrestore(&audio->capture_lock, flags);
pr_debug("%s !! buffer already filled\n", __func__);
} else {
spin_unlock_irqrestore(&audio->capture_lock, flags);
capture_buf = f_audio_buffer_alloc(audio_capture_buf_size);
if (capture_buf <= 0) {
pr_err("%s: buffer alloc failed\n", __func__);
return;
}
res = u_audio_capture(&audio->card,
capture_buf->buf,
audio_capture_buf_size);
if (res) {
pr_err("copying failed");
f_audio_buffer_free(capture_buf);
schedule_work(&audio->capture_work);
return;
}
spin_lock_irqsave(&audio->capture_lock, flags);
list_add_tail(&capture_buf->list, &audio->capture_play_queue);
spin_unlock_irqrestore(&audio->capture_lock, flags);
}
/* Queue request now */
while(1) {
/* Get A Free Request */
spin_lock_irqsave(&audio->capture_req_lock, flags);
if (list_empty(&audio->capture_req_free)) {
spin_unlock_irqrestore(&audio->capture_req_lock, flags);
return;
}
req = list_first_entry(&audio->capture_req_free, struct usb_request,list);
list_del(&req->list);
spin_unlock_irqrestore(&audio->capture_req_lock, flags);
/* Get a capture buf */
spin_lock_irqsave(&audio->capture_lock, flags);
if (list_empty(&audio->capture_play_queue)) {
spin_unlock_irqrestore(&audio->capture_lock, flags);
goto requeue;
}
copy_buf = list_first_entry(&audio->capture_play_queue,
struct f_audio_buf, list);
if (copy_buf == NULL) {
spin_unlock_irqrestore(&audio->capture_lock, flags);
goto requeue;
}
left_size = audio_capture_buf_size - copy_buf->actual;
copy_size = min(left_size, in_req_buf_size);
memcpy(req->buf, copy_buf->buf + copy_buf->actual, copy_size);
req->length = copy_size;
copy_buf->actual += copy_size;
if (audio_capture_buf_size <= copy_buf->actual) {
list_del(&copy_buf->list);
f_audio_buffer_free(copy_buf);
schedule_work(&audio->capture_work);
}
spin_unlock_irqrestore(&audio->capture_lock, flags);
ret = usb_ep_queue(ep, req, GFP_ATOMIC);
if(ret < 0) {
printk(KERN_INFO "Failed to queue request (%d).\n", ret);
goto requeue;
}
}
return;
requeue:
spin_lock_irqsave(&audio->capture_req_lock, flags);
list_add_tail(&req->list, &audio->capture_req_free);
spin_unlock_irqrestore(&audio->capture_req_lock, flags);
schedule_work(&audio->capture_work);
}
#endif
static void f_audio_playback_work(struct work_struct *data)
{
struct f_audio *audio = container_of(data, struct f_audio,
playback_work);
struct f_audio_buf *play_buf;
spin_lock_irq(&audio->playback_lock);
if (list_empty(&audio->playback_play_queue)) {
spin_unlock_irq(&audio->playback_lock);
return;
}
play_buf = list_first_entry(&audio->playback_play_queue,
struct f_audio_buf, list);
list_del(&play_buf->list);
spin_unlock_irq(&audio->playback_lock);
u_audio_playback(&audio->card, play_buf->buf, play_buf->actual);
f_audio_buffer_free(play_buf);
}
static int f_audio_in_ep_complete(struct usb_ep *ep, struct usb_request *req)
{
struct f_audio *audio = req->context;
unsigned long flags;
if (audio->alt_intf[F_AUDIO_AS_IN_INTERFACE])
{
spin_lock_irqsave(&audio->capture_req_lock, flags);
list_add_tail(&req->list, &audio->capture_req_free);
spin_unlock_irqrestore(&audio->capture_req_lock, flags);
schedule_work(&audio->capture_work);
} else //cancel buf (SHUTDOWN)
{
kfree(req->buf);
usb_ep_free_request(ep, req);
}
return 0;
}
static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req)
{
struct f_audio *audio = req->context;
struct usb_composite_dev *cdev = audio->card.func.config->cdev;
struct f_audio_buf *playback_copy_buf = audio->playback_copy_buf;
struct f_uac1_opts *opts;
int audio_playback_buf_size;
int err;
opts = container_of(audio->card.func.fi, struct f_uac1_opts,
func_inst);
audio_playback_buf_size = opts->audio_playback_buf_size;
if (!audio->alt_intf[F_AUDIO_AS_OUT_INTERFACE])//cancel buf (SHUTDOWN)
{
kfree(req->buf);
usb_ep_free_request(ep, req);
return 0;
}
if (!playback_copy_buf)
return -EINVAL;
/* Copy buffer is full, add it to the playback_play_queue */
if (audio_playback_buf_size - playback_copy_buf->actual < req->actual) {
list_add_tail(&playback_copy_buf->list, &audio->playback_play_queue);
schedule_work(&audio->playback_work);
playback_copy_buf = f_audio_buffer_alloc(audio_playback_buf_size);
if (IS_ERR(playback_copy_buf))
return -ENOMEM;
}
memcpy(playback_copy_buf->buf + playback_copy_buf->actual, req->buf, req->actual);
playback_copy_buf->actual += req->actual;
audio->playback_copy_buf = playback_copy_buf;
err = usb_ep_queue(ep, req, GFP_ATOMIC);
if (err)
ERROR(cdev, "%s queue req: %d\n", ep->name, err);
return 0;
}
static void f_audio_complete(struct usb_ep *ep, struct usb_request *req)
{
struct f_audio *audio = req->context;
int status = req->status;
u32 data = 0;
struct usb_ep *out_ep = audio->out_ep,*in_ep = audio->in_ep;
switch (status) {
case 0: /* normal completion? */
if (ep == out_ep)
f_audio_out_ep_complete(ep, req);
else if (ep == in_ep) {
f_audio_in_ep_complete(ep, req);
}
else if (audio->set_con) {
memcpy(&data, req->buf, req->length);
audio->set_con->set(audio->set_con, audio->set_cmd,
le16_to_cpu(data));
audio->set_con = NULL;
}
break;
case -ESHUTDOWN:
if (ep == out_ep)
{
f_audio_out_ep_complete(ep, req);
}
else if (ep == in_ep)
{
f_audio_in_ep_complete(ep, req);
}
default:
break;
}
}
static int audio_set_intf_req(struct usb_function *f,
const struct usb_ctrlrequest *ctrl)
{
struct f_audio *audio = func_to_audio(f);
struct usb_composite_dev *cdev = f->config->cdev;
struct usb_request *req = cdev->req;
u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
u16 len = le16_to_cpu(ctrl->wLength);
u16 w_value = le16_to_cpu(ctrl->wValue);
u8 con_sel = (w_value >> 8) & 0xFF;
u8 cmd = (ctrl->bRequest & 0x0F);
struct usb_audio_control_selector *cs;
struct usb_audio_control *con;
DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
ctrl->bRequest, w_value, len, id);
list_for_each_entry(cs, &audio->cs, list) {
if (cs->id == id) {
list_for_each_entry(con, &cs->control, list) {
if (con->type == con_sel) {
audio->set_con = con;
break;
}
}
break;
}
}
audio->set_cmd = cmd;
req->context = audio;
req->complete = f_audio_complete;
return len;
}
static int audio_get_intf_req(struct usb_function *f,
const struct usb_ctrlrequest *ctrl)
{
struct f_audio *audio = func_to_audio(f);
struct usb_composite_dev *cdev = f->config->cdev;
struct usb_request *req = cdev->req;
int value = -EOPNOTSUPP;
u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
u16 len = le16_to_cpu(ctrl->wLength);
u16 w_value = le16_to_cpu(ctrl->wValue);
u8 con_sel = (w_value >> 8) & 0xFF;
u8 cmd = (ctrl->bRequest & 0x0F);
struct usb_audio_control_selector *cs;
struct usb_audio_control *con;
DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
ctrl->bRequest, w_value, len, id);
list_for_each_entry(cs, &audio->cs, list) {
if (cs->id == id) {
list_for_each_entry(con, &cs->control, list) {
if (con->type == con_sel && con->get) {
value = con->get(con, cmd);
break;
}
}
break;
}
}
req->context = audio;
req->complete = f_audio_complete;
len = min_t(size_t, sizeof(value), len);
memcpy(req->buf, &value, len);
return len;
}
static int audio_set_endpoint_req(struct usb_function *f,
const struct usb_ctrlrequest *ctrl)
{
struct usb_composite_dev *cdev = f->config->cdev;
int value = -EOPNOTSUPP;
u16 ep = le16_to_cpu(ctrl->wIndex);
u16 len = le16_to_cpu(ctrl->wLength);
u16 w_value = le16_to_cpu(ctrl->wValue);
DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
ctrl->bRequest, w_value, len, ep);
switch (ctrl->bRequest) {
case UAC_SET_CUR:
value = len;
break;
case UAC_SET_MIN:
break;
case UAC_SET_MAX:
break;
case UAC_SET_RES:
break;
case UAC_SET_MEM:
break;
default:
break;
}
return value;
}
static int audio_get_endpoint_req(struct usb_function *f,
const struct usb_ctrlrequest *ctrl)
{
struct usb_composite_dev *cdev = f->config->cdev;
int value = -EOPNOTSUPP;
u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
u16 len = le16_to_cpu(ctrl->wLength);
u16 w_value = le16_to_cpu(ctrl->wValue);
DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n",
ctrl->bRequest, w_value, len, ep);
switch (ctrl->bRequest) {
case UAC_GET_CUR:
case UAC_GET_MIN:
case UAC_GET_MAX:
case UAC_GET_RES:
value = len;
break;
case UAC_GET_MEM:
break;
default:
break;
}
return value;
}
static int
f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
{
struct usb_composite_dev *cdev = f->config->cdev;
struct usb_request *req = cdev->req;
int value = -EOPNOTSUPP;
u16 w_index = le16_to_cpu(ctrl->wIndex);
u16 w_value = le16_to_cpu(ctrl->wValue);
u16 w_length = le16_to_cpu(ctrl->wLength);
/* composite driver infrastructure handles everything; interface
* activation uses set_alt().
*/
DBG(cdev, "control req%02x.%02x v%04x i%04x l%d\n",
ctrl->bRequestType, ctrl->bRequest,
w_value, w_index, w_length);
switch (ctrl->bRequestType) {
case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
DBG(cdev,"USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE\n");
value = audio_set_intf_req(f, ctrl);
break;
case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
DBG(cdev,"USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE\n");
value = audio_get_intf_req(f, ctrl);
break;
case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
DBG(cdev,"USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT\n");
value = audio_set_endpoint_req(f, ctrl);
break;
case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
DBG(cdev,"USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE\n");
value = audio_get_endpoint_req(f, ctrl);
break;
default:
ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n",
ctrl->bRequestType, ctrl->bRequest,
w_value, w_index, w_length);
}
/* respond with data transfer or status phase? */
if (value >= 0) {
DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n",
ctrl->bRequestType, ctrl->bRequest,
w_value, w_index, w_length);
req->zero = 0;
req->length = value;
value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
if (value < 0)
ERROR(cdev, "audio response on err %d\n", value);
}
/* device either stalls (value < 0) or reports success */
return value;
}
static int f_audio_get_alt(struct usb_function *f, unsigned intf)
{
struct f_audio *audio = func_to_audio(f);
struct f_uac1_opts *opts;
opts = container_of(f->fi, struct f_uac1_opts, func_inst);
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if ((ENABLE_MICROPHONE == opts->audio_play_mode) ||
(ENABLE_MIC_AND_SPK == opts->audio_play_mode &&
intf == ac_header_desc_2.baInterfaceNr[F_AUDIO_AS_IN_INTERFACE]))
{
return audio->alt_intf[F_AUDIO_AS_IN_INTERFACE];
}
if ((ENABLE_SPEAKER == opts->audio_play_mode) ||
(ENABLE_MIC_AND_SPK == opts->audio_play_mode &&
intf == ac_header_desc_2.baInterfaceNr[F_AUDIO_AS_OUT_INTERFACE]))
#endif
{
return audio->alt_intf[F_AUDIO_AS_OUT_INTERFACE];
}
return 0;
}
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_request *req;
struct f_uac1_opts *opts;
struct usb_ep *out_ep = audio->out_ep;
int out_req_buf_size, out_req_count, audio_playback_buf_size;
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
struct usb_ep *in_ep = audio->in_ep;
int in_req_buf_size, in_req_count, audio_capture_buf_size;
unsigned long flags;
#endif
int i = 0, err = 0;
INFO(cdev, "uac1 intf %d, alt %d\n", intf, alt);
opts = container_of(f->fi, struct f_uac1_opts, func_inst);
out_req_buf_size = opts->out_req_buf_size;
out_req_count = opts->out_req_count;
audio_playback_buf_size = opts->audio_playback_buf_size;
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
in_req_buf_size = opts->in_req_buf_size;
in_req_count = opts->in_req_count;
audio_capture_buf_size = opts->audio_capture_buf_size;
if( (ENABLE_MICROPHONE == opts->audio_play_mode) ||
(ENABLE_MIC_AND_SPK == opts->audio_play_mode && intf == ac_header_desc_2.baInterfaceNr[F_AUDIO_AS_IN_INTERFACE]))
{
if (alt == 1) {
if (in_ep)
usb_ep_disable(in_ep);
err = config_ep_by_speed(cdev->gadget, f, in_ep);
if (err)
return err;
usb_ep_enable(in_ep);
for (i = 0; i < in_req_count && err == 0; i++) {
/* Allocate a write buffer */
req = usb_ep_alloc_request(in_ep, GFP_ATOMIC);
if (!req) {
pr_err("request allocation failed\n");
return -ENOMEM;
}
req->buf = kzalloc(in_req_buf_size,GFP_ATOMIC);
if (!req->buf)
return -ENOMEM;
req->length = in_req_buf_size;
req->context = audio;
req->complete = f_audio_complete;
spin_lock_irqsave(&audio->capture_req_lock, flags);
list_add_tail(&req->list, &audio->capture_req_free);
spin_unlock_irqrestore(&audio->capture_req_lock, flags);
}
} else {
;//cancal buf at ep complete and work task
}
audio->alt_intf[F_AUDIO_AS_IN_INTERFACE] = alt;
schedule_work(&audio->capture_work);
} else if ((ENABLE_SPEAKER == opts->audio_play_mode) ||
(ENABLE_MIC_AND_SPK == opts->audio_play_mode && intf == ac_header_desc_2.baInterfaceNr[F_AUDIO_AS_OUT_INTERFACE]))
#endif
{
if (alt == 1) {
err = config_ep_by_speed(cdev->gadget, f, out_ep);
if (err)
return err;
usb_ep_enable(out_ep);
audio->playback_copy_buf = f_audio_buffer_alloc(audio_playback_buf_size);
if (IS_ERR(audio->playback_copy_buf))
return -ENOMEM;
/*
* allocate a bunch of read buffers
* and queue them all at once.
*/
for (i = 0; i < out_req_count && err == 0; i++) {
req = usb_ep_alloc_request(out_ep, GFP_ATOMIC);
if (req) {
req->buf = kzalloc(out_req_buf_size,
GFP_ATOMIC);
if (req->buf) {
req->length = out_req_buf_size;
req->context = audio;
req->complete =
f_audio_complete;
err = usb_ep_queue(out_ep,
req, GFP_ATOMIC);
if (err)
ERROR(cdev,
"%s queue req: %d\n",
out_ep->name, err);
} else
err = -ENOMEM;
} else
err = -ENOMEM;
}
audio->alt_intf[F_AUDIO_AS_OUT_INTERFACE] = alt;
} else {
struct f_audio_buf *playback_copy_buf = audio->playback_copy_buf;
if (playback_copy_buf) {
list_add_tail(&playback_copy_buf->list,
&audio->playback_play_queue);
schedule_work(&audio->playback_work);
audio->playback_copy_buf = NULL;
}
audio->alt_intf[F_AUDIO_AS_OUT_INTERFACE] = alt;
usb_ep_disable(out_ep);
}
}
return err;
}
static void f_audio_disable(struct usb_function *f)
{
struct f_audio *audio = func_to_audio(f);
struct usb_composite_dev *cdev = f->config->cdev;
DBG(cdev, "%s\n",__func__);
(void)audio;
(void)cdev;
return;
}
/*-------------------------------------------------------------------------*/
static void f_audio_build_desc(struct f_audio *audio)
{
struct gaudio *card = &audio->card;
u8 *sam_freq;
int rate;
/* Set channel numbers */
usb_out_it_desc.bNrChannels = u_audio_get_playback_channels(card);
as_out_type_i_desc.bNrChannels = u_audio_get_playback_channels(card);
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
io_in_it_desc.bNrChannels = u_audio_get_capture_channels(card);
as_in_type_i_desc.bNrChannels = u_audio_get_capture_channels(card);
#endif
/* Set sample rates */
rate = u_audio_get_playback_rate(card);
sam_freq = as_out_type_i_desc.tSamFreq[0];
memcpy(sam_freq, &rate, 3);
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
rate = u_audio_get_capture_rate(card);
sam_freq = as_in_type_i_desc.tSamFreq[0];
memcpy(sam_freq, &rate, 3);
#endif
/* Todo: Set Sample bits and other parameters */
return;
}
/* audio function driver setup/binding */
static int
f_audio_bind(struct usb_configuration *c, struct usb_function *f)
{
struct usb_composite_dev *cdev = c->cdev;
struct f_audio *audio = func_to_audio(f);
struct usb_string *us;
int status;
static struct usb_descriptor_header **f_audio_desc = NULL;
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;
}
/* Set Strings Desc & attach to releated desc*/
us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1));
if (IS_ERR(us))
return PTR_ERR(us);
ac_interface_desc.iInterface = us[STR_AC_IF].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;
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
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;
#endif
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;
audio_iad_descriptor.bFirstInterface = status;
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if(ENABLE_SPEAKER == audio_opts->audio_play_mode ||
ENABLE_MIC_AND_SPK == audio_opts->audio_play_mode )
#endif
{
status = usb_interface_id(c, f);
if (status < 0)
goto fail;
as_out_interface_alt_0_desc.bInterfaceNumber = status;
as_out_interface_alt_1_desc.bInterfaceNumber = status;
audio->alt_intf[F_AUDIO_AS_OUT_INTERFACE] = 0;
}
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if(ENABLE_MIC_AND_SPK == audio_opts->audio_play_mode)
ac_header_desc_2.baInterfaceNr[F_AUDIO_AS_OUT_INTERFACE] = status;
#endif
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if(ENABLE_MICROPHONE == audio_opts->audio_play_mode ||
ENABLE_MIC_AND_SPK == audio_opts->audio_play_mode )
{
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;
audio->alt_intf[F_AUDIO_AS_IN_INTERFACE] = 0;
}
#endif
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if(ENABLE_MIC_AND_SPK == audio_opts->audio_play_mode)
ac_header_desc_2.baInterfaceNr[F_AUDIO_AS_IN_INTERFACE] = status;
else
#endif
ac_header_desc_1.baInterfaceNr[0] = status;
status = -ENODEV;
/* allocate instance-specific endpoints */
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if(ENABLE_SPEAKER == audio_opts->audio_play_mode ||
ENABLE_MIC_AND_SPK == audio_opts->audio_play_mode )
#endif
{
as_out_ep_desc.wMaxPacketSize = audio_opts->out_req_buf_size;
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;
}
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if(ENABLE_MICROPHONE == audio_opts->audio_play_mode ||
ENABLE_MIC_AND_SPK == audio_opts->audio_play_mode )
{
as_in_ep_desc.wMaxPacketSize = audio_opts->in_req_buf_size;
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;
}
#endif
status = -ENOMEM;
/* Finally Build the Descriptors */
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if(ENABLE_MICROPHONE == audio_opts->audio_play_mode) {
audio_iad_descriptor.bInterfaceCount = 2;
f_audio_desc = f_audio_desc_1;
}
else if(ENABLE_MIC_AND_SPK == audio_opts->audio_play_mode) {
audio_iad_descriptor.bInterfaceCount = 3;
f_audio_desc = f_audio_desc_2;
} else if (ENABLE_SPEAKER == audio_opts->audio_play_mode)
#endif
{
audio_iad_descriptor.bInterfaceCount = 2;
f_audio_desc = f_audio_desc_0;
}
/* copy descriptors, and track endpoint copies */
status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL,
NULL);
if (status)
goto fail;
return 0;
fail:
gaudio_cleanup(&audio->card);
return status;
}
/*-------------------------------------------------------------------------*/
static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value)
{
con->data[cmd] = value;
return 0;
}
static int generic_get_cmd(struct usb_audio_control *con, u8 cmd)
{
return con->data[cmd];
}
static int control_selector_init(struct f_audio *audio)
{
INIT_LIST_HEAD(&audio->cs);
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
list_add(&capture_fu_controls.list,&audio->cs);
#endif
list_add(&playback_fu_controls.list,&audio->cs);
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
INIT_LIST_HEAD(&capture_fu_controls.control);
list_add(&capture_mute_control.list,
&capture_fu_controls.control);
list_add(&capture_volume_control.list,
&capture_fu_controls.control);
#endif
INIT_LIST_HEAD(&playback_fu_controls.control);
list_add(&playback_mute_control.list,
&playback_fu_controls.control);
list_add(&playback_volume_control.list,
&playback_fu_controls.control);
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
capture_volume_control.data[UAC__CUR] = 0xffc0;
capture_volume_control.data[UAC__MIN] = 0xe3a0;
capture_volume_control.data[UAC__MAX] = 0xfff0;
capture_volume_control.data[UAC__RES] = 0x0030;
#endif
playback_volume_control.data[UAC__CUR] = 0xffc0;
playback_volume_control.data[UAC__MIN] = 0xe3a0;
playback_volume_control.data[UAC__MAX] = 0xfff0;
playback_volume_control.data[UAC__RES] = 0x0030;
return 0;
}
static inline struct f_uac1_opts *to_f_uac1_opts(struct config_item *item)
{
return container_of(to_config_group(item), struct f_uac1_opts,
func_inst.group);
}
static void f_uac1_attr_release(struct config_item *item)
{
struct f_uac1_opts *opts = to_f_uac1_opts(item);
usb_put_function_instance(&opts->func_inst);
}
static struct configfs_item_operations f_uac1_item_ops = {
.release = f_uac1_attr_release,
};
#define UAC1_INT_ATTRIBUTE(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 = sprintf(page, "%u\n", 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; \
u32 num; \
\
mutex_lock(&opts->lock); \
if (opts->refcnt) { \
ret = -EBUSY; \
goto end; \
} \
\
ret = kstrtou32(page, 0, &num); \
if (ret) \
goto end; \
\
opts->name = num; \
ret = len; \
\
end: \
mutex_unlock(&opts->lock); \
return ret; \
} \
\
CONFIGFS_ATTR(f_uac1_opts_, name)
UAC1_INT_ATTRIBUTE(out_req_buf_size);
UAC1_INT_ATTRIBUTE(out_req_count);
UAC1_INT_ATTRIBUTE(audio_playback_buf_size);
UAC1_INT_ATTRIBUTE(in_req_buf_size);
UAC1_INT_ATTRIBUTE(in_req_count);
UAC1_INT_ATTRIBUTE(audio_capture_buf_size);
#define UAC1_STR_ATTRIBUTE(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 = sprintf(page, "%s\n", 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 = -EBUSY; \
char *tmp; \
\
mutex_lock(&opts->lock); \
if (opts->refcnt) \
goto end; \
\
tmp = kstrndup(page, len, GFP_KERNEL); \
if (tmp) { \
ret = -ENOMEM; \
goto end; \
} \
if (opts->name##_alloc) \
kfree(opts->name); \
opts->name##_alloc = true; \
opts->name = tmp; \
ret = len; \
\
end: \
mutex_unlock(&opts->lock); \
return ret; \
} \
\
CONFIGFS_ATTR(f_uac1_opts_, name)
UAC1_STR_ATTRIBUTE(fn_play);
UAC1_STR_ATTRIBUTE(fn_cap);
UAC1_STR_ATTRIBUTE(fn_cntl);
static struct configfs_attribute *f_uac1_attrs[] = {
&f_uac1_opts_attr_out_req_buf_size,
&f_uac1_opts_attr_out_req_count,
&f_uac1_opts_attr_audio_playback_buf_size,
&f_uac1_opts_attr_in_req_buf_size,
&f_uac1_opts_attr_in_req_count,
&f_uac1_opts_attr_audio_capture_buf_size,
&f_uac1_opts_attr_fn_play,
&f_uac1_opts_attr_fn_cap,
&f_uac1_opts_attr_fn_cntl,
NULL,
};
static struct config_item_type f_uac1_func_type = {
.ct_item_ops = &f_uac1_item_ops,
.ct_attrs = f_uac1_attrs,
.ct_owner = THIS_MODULE,
};
static void f_audio_free_inst(struct usb_function_instance *f)
{
struct f_uac1_opts *opts;
opts = container_of(f, struct f_uac1_opts, func_inst);
if (opts->fn_play_alloc)
kfree(opts->fn_play);
if (opts->fn_cap_alloc)
kfree(opts->fn_cap);
if (opts->fn_cntl_alloc)
kfree(opts->fn_cntl);
kfree(opts);
}
static struct usb_function_instance *f_audio_alloc_inst(void)
{
struct f_uac1_opts *opts;
opts = kzalloc(sizeof(*opts), GFP_KERNEL);
if (!opts)
return ERR_PTR(-ENOMEM);
mutex_init(&opts->lock);
opts->func_inst.free_func_inst = f_audio_free_inst;
config_group_init_type_name(&opts->func_inst.group, "",
&f_uac1_func_type);
opts->fn_play = FILE_PCM_PLAYBACK;
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
opts->fn_cap = FILE_PCM_CAPTURE;
#endif
opts->fn_cntl = FILE_CONTROL;
return &opts->func_inst;
}
static void f_audio_free(struct usb_function *f)
{
struct f_audio *audio = func_to_audio(f);
struct f_uac1_opts *opts;
gaudio_cleanup(&audio->card);
opts = container_of(f->fi, struct f_uac1_opts, func_inst);
kfree(audio);
mutex_lock(&opts->lock);
--opts->refcnt;
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;
struct f_uac1_opts *opts;
/* allocate and initialize one new instance */
audio = kzalloc(sizeof(*audio), GFP_KERNEL);
if (!audio)
return ERR_PTR(-ENOMEM);
audio->card.func.name = "g_audio";
opts = container_of(fi, struct f_uac1_opts, func_inst);
mutex_lock(&opts->lock);
++opts->refcnt;
mutex_unlock(&opts->lock);
INIT_LIST_HEAD(&audio->playback_play_queue);
INIT_LIST_HEAD(&audio->capture_play_queue);
spin_lock_init(&audio->playback_lock);
spin_lock_init(&audio->capture_lock);
INIT_LIST_HEAD(&audio->capture_req_free);
spin_lock_init(&audio->capture_req_lock);
audio->card.func.bind = f_audio_bind;
audio->card.func.unbind = f_audio_unbind;
audio->card.func.get_alt = f_audio_get_alt;
audio->card.func.set_alt = f_audio_set_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);
#if defined(CONFIG_SS_GADGET) ||defined(CONFIG_SS_GADGET_MODULE)
if(ENABLE_MICROPHONE == opts->audio_play_mode)
INIT_WORK(&audio->capture_work, f_audio_capture_work);
else if(ENABLE_MIC_AND_SPK == opts->audio_play_mode)
{
INIT_WORK(&audio->playback_work, f_audio_playback_work);
INIT_WORK(&audio->capture_work, f_audio_capture_work);
}
else if (ENABLE_SPEAKER == opts->audio_play_mode)
#endif
INIT_WORK(&audio->playback_work, f_audio_playback_work);
return &audio->card.func;
}
DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Bryan Wu");
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