mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1213 lines
33 KiB
1213 lines
33 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* f_uac2.c -- USB Audio Class 2.0 Function |
|
* |
|
* Copyright (C) 2011 |
|
* Yadwinder Singh ([email protected]) |
|
* Jaswinder Singh ([email protected]) |
|
*/ |
|
|
|
#include <linux/usb/audio.h> |
|
#include <linux/usb/audio-v2.h> |
|
#include <linux/module.h> |
|
|
|
#include "u_audio.h" |
|
#include "u_uac2.h" |
|
|
|
/* UAC2 spec: 4.1 Audio Channel Cluster Descriptor */ |
|
#define UAC2_CHANNEL_MASK 0x07FFFFFF |
|
|
|
/* |
|
* The driver implements a simple UAC_2 topology. |
|
* USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture |
|
* ALSA_Playback -> IT_2 -> OT_4 -> USB-IN |
|
* Capture and Playback sampling rates are independently |
|
* controlled by two clock sources : |
|
* CLK_5 := c_srate, and CLK_6 := p_srate |
|
*/ |
|
#define USB_OUT_CLK_ID (out_clk_src_desc.bClockID) |
|
#define USB_IN_CLK_ID (in_clk_src_desc.bClockID) |
|
|
|
#define CONTROL_ABSENT 0 |
|
#define CONTROL_RDONLY 1 |
|
#define CONTROL_RDWR 3 |
|
|
|
#define CLK_FREQ_CTRL 0 |
|
#define CLK_VLD_CTRL 2 |
|
|
|
#define COPY_CTRL 0 |
|
#define CONN_CTRL 2 |
|
#define OVRLD_CTRL 4 |
|
#define CLSTR_CTRL 6 |
|
#define UNFLW_CTRL 8 |
|
#define OVFLW_CTRL 10 |
|
|
|
#define EPIN_EN(_opts) ((_opts)->p_chmask != 0) |
|
#define EPOUT_EN(_opts) ((_opts)->c_chmask != 0) |
|
|
|
struct f_uac2 { |
|
struct g_audio g_audio; |
|
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_uac2 *func_to_uac2(struct usb_function *f) |
|
{ |
|
return container_of(f, struct f_uac2, g_audio.func); |
|
} |
|
|
|
static inline |
|
struct f_uac2_opts *g_audio_to_uac2_opts(struct g_audio *agdev) |
|
{ |
|
return container_of(agdev->func.fi, struct f_uac2_opts, func_inst); |
|
} |
|
|
|
/* --------- USB Function Interface ------------- */ |
|
|
|
enum { |
|
STR_ASSOC, |
|
STR_IF_CTRL, |
|
STR_CLKSRC_IN, |
|
STR_CLKSRC_OUT, |
|
STR_USB_IT, |
|
STR_IO_IT, |
|
STR_USB_OT, |
|
STR_IO_OT, |
|
STR_AS_OUT_ALT0, |
|
STR_AS_OUT_ALT1, |
|
STR_AS_IN_ALT0, |
|
STR_AS_IN_ALT1, |
|
}; |
|
|
|
static char clksrc_in[8]; |
|
static char clksrc_out[8]; |
|
|
|
static struct usb_string strings_fn[] = { |
|
[STR_ASSOC].s = "Source/Sink", |
|
[STR_IF_CTRL].s = "Topology Control", |
|
[STR_CLKSRC_IN].s = clksrc_in, |
|
[STR_CLKSRC_OUT].s = clksrc_out, |
|
[STR_USB_IT].s = "USBH Out", |
|
[STR_IO_IT].s = "USBD Out", |
|
[STR_USB_OT].s = "USBH In", |
|
[STR_IO_OT].s = "USBD In", |
|
[STR_AS_OUT_ALT0].s = "Playback Inactive", |
|
[STR_AS_OUT_ALT1].s = "Playback Active", |
|
[STR_AS_IN_ALT0].s = "Capture Inactive", |
|
[STR_AS_IN_ALT1].s = "Capture Active", |
|
{ }, |
|
}; |
|
|
|
static struct usb_gadget_strings str_fn = { |
|
.language = 0x0409, /* en-us */ |
|
.strings = strings_fn, |
|
}; |
|
|
|
static struct usb_gadget_strings *fn_strings[] = { |
|
&str_fn, |
|
NULL, |
|
}; |
|
|
|
static struct usb_interface_assoc_descriptor iad_desc = { |
|
.bLength = sizeof iad_desc, |
|
.bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, |
|
|
|
.bFirstInterface = 0, |
|
.bInterfaceCount = 3, |
|
.bFunctionClass = USB_CLASS_AUDIO, |
|
.bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED, |
|
.bFunctionProtocol = UAC_VERSION_2, |
|
}; |
|
|
|
/* Audio Control Interface */ |
|
static struct usb_interface_descriptor std_ac_if_desc = { |
|
.bLength = sizeof std_ac_if_desc, |
|
.bDescriptorType = USB_DT_INTERFACE, |
|
|
|
.bAlternateSetting = 0, |
|
.bNumEndpoints = 0, |
|
.bInterfaceClass = USB_CLASS_AUDIO, |
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, |
|
.bInterfaceProtocol = UAC_VERSION_2, |
|
}; |
|
|
|
/* Clock source for IN traffic */ |
|
static struct uac_clock_source_descriptor in_clk_src_desc = { |
|
.bLength = sizeof in_clk_src_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC2_CLOCK_SOURCE, |
|
/* .bClockID = DYNAMIC */ |
|
.bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, |
|
.bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL), |
|
.bAssocTerminal = 0, |
|
}; |
|
|
|
/* Clock source for OUT traffic */ |
|
static struct uac_clock_source_descriptor out_clk_src_desc = { |
|
.bLength = sizeof out_clk_src_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC2_CLOCK_SOURCE, |
|
/* .bClockID = DYNAMIC */ |
|
.bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, |
|
.bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL), |
|
.bAssocTerminal = 0, |
|
}; |
|
|
|
/* Input Terminal for USB_OUT */ |
|
static struct uac2_input_terminal_descriptor usb_out_it_desc = { |
|
.bLength = sizeof usb_out_it_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC_INPUT_TERMINAL, |
|
/* .bTerminalID = DYNAMIC */ |
|
.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), |
|
.bAssocTerminal = 0, |
|
/* .bCSourceID = DYNAMIC */ |
|
.iChannelNames = 0, |
|
.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), |
|
}; |
|
|
|
/* Input Terminal for I/O-In */ |
|
static struct uac2_input_terminal_descriptor io_in_it_desc = { |
|
.bLength = sizeof io_in_it_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC_INPUT_TERMINAL, |
|
/* .bTerminalID = DYNAMIC */ |
|
.wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_UNDEFINED), |
|
.bAssocTerminal = 0, |
|
/* .bCSourceID = DYNAMIC */ |
|
.iChannelNames = 0, |
|
.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), |
|
}; |
|
|
|
/* Ouput Terminal for USB_IN */ |
|
static struct uac2_output_terminal_descriptor usb_in_ot_desc = { |
|
.bLength = sizeof usb_in_ot_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC_OUTPUT_TERMINAL, |
|
/* .bTerminalID = DYNAMIC */ |
|
.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), |
|
.bAssocTerminal = 0, |
|
/* .bSourceID = DYNAMIC */ |
|
/* .bCSourceID = DYNAMIC */ |
|
.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), |
|
}; |
|
|
|
/* Ouput Terminal for I/O-Out */ |
|
static struct uac2_output_terminal_descriptor io_out_ot_desc = { |
|
.bLength = sizeof io_out_ot_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC_OUTPUT_TERMINAL, |
|
/* .bTerminalID = DYNAMIC */ |
|
.wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_UNDEFINED), |
|
.bAssocTerminal = 0, |
|
/* .bSourceID = DYNAMIC */ |
|
/* .bCSourceID = DYNAMIC */ |
|
.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), |
|
}; |
|
|
|
static struct uac2_ac_header_descriptor ac_hdr_desc = { |
|
.bLength = sizeof ac_hdr_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC_MS_HEADER, |
|
.bcdADC = cpu_to_le16(0x200), |
|
.bCategory = UAC2_FUNCTION_IO_BOX, |
|
/* .wTotalLength = DYNAMIC */ |
|
.bmControls = 0, |
|
}; |
|
|
|
/* Audio Streaming OUT Interface - Alt0 */ |
|
static struct usb_interface_descriptor std_as_out_if0_desc = { |
|
.bLength = sizeof std_as_out_if0_desc, |
|
.bDescriptorType = USB_DT_INTERFACE, |
|
|
|
.bAlternateSetting = 0, |
|
.bNumEndpoints = 0, |
|
.bInterfaceClass = USB_CLASS_AUDIO, |
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, |
|
.bInterfaceProtocol = UAC_VERSION_2, |
|
}; |
|
|
|
/* Audio Streaming OUT Interface - Alt1 */ |
|
static struct usb_interface_descriptor std_as_out_if1_desc = { |
|
.bLength = sizeof std_as_out_if1_desc, |
|
.bDescriptorType = USB_DT_INTERFACE, |
|
|
|
.bAlternateSetting = 1, |
|
.bNumEndpoints = 1, |
|
.bInterfaceClass = USB_CLASS_AUDIO, |
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, |
|
.bInterfaceProtocol = UAC_VERSION_2, |
|
}; |
|
|
|
/* Audio Stream OUT Intface Desc */ |
|
static struct uac2_as_header_descriptor as_out_hdr_desc = { |
|
.bLength = sizeof as_out_hdr_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC_AS_GENERAL, |
|
/* .bTerminalLink = DYNAMIC */ |
|
.bmControls = 0, |
|
.bFormatType = UAC_FORMAT_TYPE_I, |
|
.bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), |
|
.iChannelNames = 0, |
|
}; |
|
|
|
/* Audio USB_OUT Format */ |
|
static struct uac2_format_type_i_descriptor as_out_fmt1_desc = { |
|
.bLength = sizeof as_out_fmt1_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
.bDescriptorSubtype = UAC_FORMAT_TYPE, |
|
.bFormatType = UAC_FORMAT_TYPE_I, |
|
}; |
|
|
|
/* STD AS ISO OUT Endpoint */ |
|
static struct usb_endpoint_descriptor fs_epout_desc = { |
|
.bLength = USB_DT_ENDPOINT_SIZE, |
|
.bDescriptorType = USB_DT_ENDPOINT, |
|
|
|
.bEndpointAddress = USB_DIR_OUT, |
|
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, |
|
/* .wMaxPacketSize = DYNAMIC */ |
|
.bInterval = 1, |
|
}; |
|
|
|
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, |
|
/* .wMaxPacketSize = DYNAMIC */ |
|
.bInterval = 4, |
|
}; |
|
|
|
/* CS AS ISO OUT Endpoint */ |
|
static struct uac2_iso_endpoint_descriptor as_iso_out_desc = { |
|
.bLength = sizeof as_iso_out_desc, |
|
.bDescriptorType = USB_DT_CS_ENDPOINT, |
|
|
|
.bDescriptorSubtype = UAC_EP_GENERAL, |
|
.bmAttributes = 0, |
|
.bmControls = 0, |
|
.bLockDelayUnits = 0, |
|
.wLockDelay = 0, |
|
}; |
|
|
|
/* Audio Streaming IN Interface - Alt0 */ |
|
static struct usb_interface_descriptor std_as_in_if0_desc = { |
|
.bLength = sizeof std_as_in_if0_desc, |
|
.bDescriptorType = USB_DT_INTERFACE, |
|
|
|
.bAlternateSetting = 0, |
|
.bNumEndpoints = 0, |
|
.bInterfaceClass = USB_CLASS_AUDIO, |
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, |
|
.bInterfaceProtocol = UAC_VERSION_2, |
|
}; |
|
|
|
/* Audio Streaming IN Interface - Alt1 */ |
|
static struct usb_interface_descriptor std_as_in_if1_desc = { |
|
.bLength = sizeof std_as_in_if1_desc, |
|
.bDescriptorType = USB_DT_INTERFACE, |
|
|
|
.bAlternateSetting = 1, |
|
.bNumEndpoints = 1, |
|
.bInterfaceClass = USB_CLASS_AUDIO, |
|
.bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, |
|
.bInterfaceProtocol = UAC_VERSION_2, |
|
}; |
|
|
|
/* Audio Stream IN Intface Desc */ |
|
static struct uac2_as_header_descriptor as_in_hdr_desc = { |
|
.bLength = sizeof as_in_hdr_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
|
|
.bDescriptorSubtype = UAC_AS_GENERAL, |
|
/* .bTerminalLink = DYNAMIC */ |
|
.bmControls = 0, |
|
.bFormatType = UAC_FORMAT_TYPE_I, |
|
.bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), |
|
.iChannelNames = 0, |
|
}; |
|
|
|
/* Audio USB_IN Format */ |
|
static struct uac2_format_type_i_descriptor as_in_fmt1_desc = { |
|
.bLength = sizeof as_in_fmt1_desc, |
|
.bDescriptorType = USB_DT_CS_INTERFACE, |
|
.bDescriptorSubtype = UAC_FORMAT_TYPE, |
|
.bFormatType = UAC_FORMAT_TYPE_I, |
|
}; |
|
|
|
/* STD AS ISO IN Endpoint */ |
|
static struct usb_endpoint_descriptor fs_epin_desc = { |
|
.bLength = USB_DT_ENDPOINT_SIZE, |
|
.bDescriptorType = USB_DT_ENDPOINT, |
|
|
|
.bEndpointAddress = USB_DIR_IN, |
|
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, |
|
/* .wMaxPacketSize = DYNAMIC */ |
|
.bInterval = 1, |
|
}; |
|
|
|
static struct usb_endpoint_descriptor hs_epin_desc = { |
|
.bLength = USB_DT_ENDPOINT_SIZE, |
|
.bDescriptorType = USB_DT_ENDPOINT, |
|
|
|
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, |
|
/* .wMaxPacketSize = DYNAMIC */ |
|
.bInterval = 4, |
|
}; |
|
|
|
/* CS AS ISO IN Endpoint */ |
|
static struct uac2_iso_endpoint_descriptor as_iso_in_desc = { |
|
.bLength = sizeof as_iso_in_desc, |
|
.bDescriptorType = USB_DT_CS_ENDPOINT, |
|
|
|
.bDescriptorSubtype = UAC_EP_GENERAL, |
|
.bmAttributes = 0, |
|
.bmControls = 0, |
|
.bLockDelayUnits = 0, |
|
.wLockDelay = 0, |
|
}; |
|
|
|
static struct usb_descriptor_header *fs_audio_desc[] = { |
|
(struct usb_descriptor_header *)&iad_desc, |
|
(struct usb_descriptor_header *)&std_ac_if_desc, |
|
|
|
(struct usb_descriptor_header *)&ac_hdr_desc, |
|
(struct usb_descriptor_header *)&in_clk_src_desc, |
|
(struct usb_descriptor_header *)&out_clk_src_desc, |
|
(struct usb_descriptor_header *)&usb_out_it_desc, |
|
(struct usb_descriptor_header *)&io_in_it_desc, |
|
(struct usb_descriptor_header *)&usb_in_ot_desc, |
|
(struct usb_descriptor_header *)&io_out_ot_desc, |
|
|
|
(struct usb_descriptor_header *)&std_as_out_if0_desc, |
|
(struct usb_descriptor_header *)&std_as_out_if1_desc, |
|
|
|
(struct usb_descriptor_header *)&as_out_hdr_desc, |
|
(struct usb_descriptor_header *)&as_out_fmt1_desc, |
|
(struct usb_descriptor_header *)&fs_epout_desc, |
|
(struct usb_descriptor_header *)&as_iso_out_desc, |
|
|
|
(struct usb_descriptor_header *)&std_as_in_if0_desc, |
|
(struct usb_descriptor_header *)&std_as_in_if1_desc, |
|
|
|
(struct usb_descriptor_header *)&as_in_hdr_desc, |
|
(struct usb_descriptor_header *)&as_in_fmt1_desc, |
|
(struct usb_descriptor_header *)&fs_epin_desc, |
|
(struct usb_descriptor_header *)&as_iso_in_desc, |
|
NULL, |
|
}; |
|
|
|
static struct usb_descriptor_header *hs_audio_desc[] = { |
|
(struct usb_descriptor_header *)&iad_desc, |
|
(struct usb_descriptor_header *)&std_ac_if_desc, |
|
|
|
(struct usb_descriptor_header *)&ac_hdr_desc, |
|
(struct usb_descriptor_header *)&in_clk_src_desc, |
|
(struct usb_descriptor_header *)&out_clk_src_desc, |
|
(struct usb_descriptor_header *)&usb_out_it_desc, |
|
(struct usb_descriptor_header *)&io_in_it_desc, |
|
(struct usb_descriptor_header *)&usb_in_ot_desc, |
|
(struct usb_descriptor_header *)&io_out_ot_desc, |
|
|
|
(struct usb_descriptor_header *)&std_as_out_if0_desc, |
|
(struct usb_descriptor_header *)&std_as_out_if1_desc, |
|
|
|
(struct usb_descriptor_header *)&as_out_hdr_desc, |
|
(struct usb_descriptor_header *)&as_out_fmt1_desc, |
|
(struct usb_descriptor_header *)&hs_epout_desc, |
|
(struct usb_descriptor_header *)&as_iso_out_desc, |
|
|
|
(struct usb_descriptor_header *)&std_as_in_if0_desc, |
|
(struct usb_descriptor_header *)&std_as_in_if1_desc, |
|
|
|
(struct usb_descriptor_header *)&as_in_hdr_desc, |
|
(struct usb_descriptor_header *)&as_in_fmt1_desc, |
|
(struct usb_descriptor_header *)&hs_epin_desc, |
|
(struct usb_descriptor_header *)&as_iso_in_desc, |
|
NULL, |
|
}; |
|
|
|
struct cntrl_cur_lay3 { |
|
__le32 dCUR; |
|
}; |
|
|
|
struct cntrl_range_lay3 { |
|
__le16 wNumSubRanges; |
|
__le32 dMIN; |
|
__le32 dMAX; |
|
__le32 dRES; |
|
} __packed; |
|
|
|
static int set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts, |
|
struct usb_endpoint_descriptor *ep_desc, |
|
enum usb_device_speed speed, bool is_playback) |
|
{ |
|
int chmask, srate, ssize; |
|
u16 max_size_bw, max_size_ep; |
|
unsigned int factor; |
|
|
|
switch (speed) { |
|
case USB_SPEED_FULL: |
|
max_size_ep = 1023; |
|
factor = 1000; |
|
break; |
|
|
|
case USB_SPEED_HIGH: |
|
max_size_ep = 1024; |
|
factor = 8000; |
|
break; |
|
|
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
if (is_playback) { |
|
chmask = uac2_opts->p_chmask; |
|
srate = uac2_opts->p_srate; |
|
ssize = uac2_opts->p_ssize; |
|
} else { |
|
chmask = uac2_opts->c_chmask; |
|
srate = uac2_opts->c_srate; |
|
ssize = uac2_opts->c_ssize; |
|
} |
|
|
|
max_size_bw = num_channels(chmask) * ssize * |
|
((srate / (factor / (1 << (ep_desc->bInterval - 1)))) + 1); |
|
ep_desc->wMaxPacketSize = cpu_to_le16(min_t(u16, max_size_bw, |
|
max_size_ep)); |
|
|
|
return 0; |
|
} |
|
|
|
/* Use macro to overcome line length limitation */ |
|
#define USBDHDR(p) (struct usb_descriptor_header *)(p) |
|
|
|
static void setup_descriptor(struct f_uac2_opts *opts) |
|
{ |
|
/* patch descriptors */ |
|
int i = 1; /* ID's start with 1 */ |
|
|
|
if (EPOUT_EN(opts)) |
|
usb_out_it_desc.bTerminalID = i++; |
|
if (EPIN_EN(opts)) |
|
io_in_it_desc.bTerminalID = i++; |
|
if (EPOUT_EN(opts)) |
|
io_out_ot_desc.bTerminalID = i++; |
|
if (EPIN_EN(opts)) |
|
usb_in_ot_desc.bTerminalID = i++; |
|
if (EPOUT_EN(opts)) |
|
out_clk_src_desc.bClockID = i++; |
|
if (EPIN_EN(opts)) |
|
in_clk_src_desc.bClockID = i++; |
|
|
|
usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID; |
|
usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID; |
|
usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID; |
|
io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID; |
|
io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID; |
|
io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID; |
|
as_out_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID; |
|
as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID; |
|
|
|
iad_desc.bInterfaceCount = 1; |
|
ac_hdr_desc.wTotalLength = cpu_to_le16(sizeof(ac_hdr_desc)); |
|
|
|
if (EPIN_EN(opts)) { |
|
u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); |
|
|
|
len += sizeof(in_clk_src_desc); |
|
len += sizeof(usb_in_ot_desc); |
|
len += sizeof(io_in_it_desc); |
|
ac_hdr_desc.wTotalLength = cpu_to_le16(len); |
|
iad_desc.bInterfaceCount++; |
|
} |
|
if (EPOUT_EN(opts)) { |
|
u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); |
|
|
|
len += sizeof(out_clk_src_desc); |
|
len += sizeof(usb_out_it_desc); |
|
len += sizeof(io_out_ot_desc); |
|
ac_hdr_desc.wTotalLength = cpu_to_le16(len); |
|
iad_desc.bInterfaceCount++; |
|
} |
|
|
|
i = 0; |
|
fs_audio_desc[i++] = USBDHDR(&iad_desc); |
|
fs_audio_desc[i++] = USBDHDR(&std_ac_if_desc); |
|
fs_audio_desc[i++] = USBDHDR(&ac_hdr_desc); |
|
if (EPIN_EN(opts)) |
|
fs_audio_desc[i++] = USBDHDR(&in_clk_src_desc); |
|
if (EPOUT_EN(opts)) { |
|
fs_audio_desc[i++] = USBDHDR(&out_clk_src_desc); |
|
fs_audio_desc[i++] = USBDHDR(&usb_out_it_desc); |
|
} |
|
if (EPIN_EN(opts)) { |
|
fs_audio_desc[i++] = USBDHDR(&io_in_it_desc); |
|
fs_audio_desc[i++] = USBDHDR(&usb_in_ot_desc); |
|
} |
|
if (EPOUT_EN(opts)) { |
|
fs_audio_desc[i++] = USBDHDR(&io_out_ot_desc); |
|
fs_audio_desc[i++] = USBDHDR(&std_as_out_if0_desc); |
|
fs_audio_desc[i++] = USBDHDR(&std_as_out_if1_desc); |
|
fs_audio_desc[i++] = USBDHDR(&as_out_hdr_desc); |
|
fs_audio_desc[i++] = USBDHDR(&as_out_fmt1_desc); |
|
fs_audio_desc[i++] = USBDHDR(&fs_epout_desc); |
|
fs_audio_desc[i++] = USBDHDR(&as_iso_out_desc); |
|
} |
|
if (EPIN_EN(opts)) { |
|
fs_audio_desc[i++] = USBDHDR(&std_as_in_if0_desc); |
|
fs_audio_desc[i++] = USBDHDR(&std_as_in_if1_desc); |
|
fs_audio_desc[i++] = USBDHDR(&as_in_hdr_desc); |
|
fs_audio_desc[i++] = USBDHDR(&as_in_fmt1_desc); |
|
fs_audio_desc[i++] = USBDHDR(&fs_epin_desc); |
|
fs_audio_desc[i++] = USBDHDR(&as_iso_in_desc); |
|
} |
|
fs_audio_desc[i] = NULL; |
|
|
|
i = 0; |
|
hs_audio_desc[i++] = USBDHDR(&iad_desc); |
|
hs_audio_desc[i++] = USBDHDR(&std_ac_if_desc); |
|
hs_audio_desc[i++] = USBDHDR(&ac_hdr_desc); |
|
if (EPIN_EN(opts)) |
|
hs_audio_desc[i++] = USBDHDR(&in_clk_src_desc); |
|
if (EPOUT_EN(opts)) { |
|
hs_audio_desc[i++] = USBDHDR(&out_clk_src_desc); |
|
hs_audio_desc[i++] = USBDHDR(&usb_out_it_desc); |
|
} |
|
if (EPIN_EN(opts)) { |
|
hs_audio_desc[i++] = USBDHDR(&io_in_it_desc); |
|
hs_audio_desc[i++] = USBDHDR(&usb_in_ot_desc); |
|
} |
|
if (EPOUT_EN(opts)) { |
|
hs_audio_desc[i++] = USBDHDR(&io_out_ot_desc); |
|
hs_audio_desc[i++] = USBDHDR(&std_as_out_if0_desc); |
|
hs_audio_desc[i++] = USBDHDR(&std_as_out_if1_desc); |
|
hs_audio_desc[i++] = USBDHDR(&as_out_hdr_desc); |
|
hs_audio_desc[i++] = USBDHDR(&as_out_fmt1_desc); |
|
hs_audio_desc[i++] = USBDHDR(&hs_epout_desc); |
|
hs_audio_desc[i++] = USBDHDR(&as_iso_out_desc); |
|
} |
|
if (EPIN_EN(opts)) { |
|
hs_audio_desc[i++] = USBDHDR(&std_as_in_if0_desc); |
|
hs_audio_desc[i++] = USBDHDR(&std_as_in_if1_desc); |
|
hs_audio_desc[i++] = USBDHDR(&as_in_hdr_desc); |
|
hs_audio_desc[i++] = USBDHDR(&as_in_fmt1_desc); |
|
hs_audio_desc[i++] = USBDHDR(&hs_epin_desc); |
|
hs_audio_desc[i++] = USBDHDR(&as_iso_in_desc); |
|
} |
|
hs_audio_desc[i] = NULL; |
|
} |
|
|
|
static int afunc_validate_opts(struct g_audio *agdev, struct device *dev) |
|
{ |
|
struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); |
|
|
|
if (!opts->p_chmask && !opts->c_chmask) { |
|
dev_err(dev, "Error: no playback and capture channels\n"); |
|
return -EINVAL; |
|
} else if (opts->p_chmask & ~UAC2_CHANNEL_MASK) { |
|
dev_err(dev, "Error: unsupported playback channels mask\n"); |
|
return -EINVAL; |
|
} else if (opts->c_chmask & ~UAC2_CHANNEL_MASK) { |
|
dev_err(dev, "Error: unsupported capture channels mask\n"); |
|
return -EINVAL; |
|
} else if ((opts->p_ssize < 1) || (opts->p_ssize > 4)) { |
|
dev_err(dev, "Error: incorrect playback sample size\n"); |
|
return -EINVAL; |
|
} else if ((opts->c_ssize < 1) || (opts->c_ssize > 4)) { |
|
dev_err(dev, "Error: incorrect capture sample size\n"); |
|
return -EINVAL; |
|
} else if (!opts->p_srate) { |
|
dev_err(dev, "Error: incorrect playback sampling rate\n"); |
|
return -EINVAL; |
|
} else if (!opts->c_srate) { |
|
dev_err(dev, "Error: incorrect capture sampling rate\n"); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int |
|
afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) |
|
{ |
|
struct f_uac2 *uac2 = func_to_uac2(fn); |
|
struct g_audio *agdev = func_to_g_audio(fn); |
|
struct usb_composite_dev *cdev = cfg->cdev; |
|
struct usb_gadget *gadget = cdev->gadget; |
|
struct device *dev = &gadget->dev; |
|
struct f_uac2_opts *uac2_opts = g_audio_to_uac2_opts(agdev); |
|
struct usb_string *us; |
|
int ret; |
|
|
|
ret = afunc_validate_opts(agdev, dev); |
|
if (ret) |
|
return ret; |
|
|
|
us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn)); |
|
if (IS_ERR(us)) |
|
return PTR_ERR(us); |
|
iad_desc.iFunction = us[STR_ASSOC].id; |
|
std_ac_if_desc.iInterface = us[STR_IF_CTRL].id; |
|
in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id; |
|
out_clk_src_desc.iClockSource = us[STR_CLKSRC_OUT].id; |
|
usb_out_it_desc.iTerminal = us[STR_USB_IT].id; |
|
io_in_it_desc.iTerminal = us[STR_IO_IT].id; |
|
usb_in_ot_desc.iTerminal = us[STR_USB_OT].id; |
|
io_out_ot_desc.iTerminal = us[STR_IO_OT].id; |
|
std_as_out_if0_desc.iInterface = us[STR_AS_OUT_ALT0].id; |
|
std_as_out_if1_desc.iInterface = us[STR_AS_OUT_ALT1].id; |
|
std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id; |
|
std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id; |
|
|
|
|
|
/* Initialize the configurable parameters */ |
|
usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask); |
|
usb_out_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); |
|
io_in_it_desc.bNrChannels = num_channels(uac2_opts->p_chmask); |
|
io_in_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); |
|
as_out_hdr_desc.bNrChannels = num_channels(uac2_opts->c_chmask); |
|
as_out_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); |
|
as_in_hdr_desc.bNrChannels = num_channels(uac2_opts->p_chmask); |
|
as_in_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); |
|
as_out_fmt1_desc.bSubslotSize = uac2_opts->c_ssize; |
|
as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8; |
|
as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize; |
|
as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8; |
|
|
|
snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", uac2_opts->p_srate); |
|
snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", uac2_opts->c_srate); |
|
|
|
ret = usb_interface_id(cfg, fn); |
|
if (ret < 0) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return ret; |
|
} |
|
iad_desc.bFirstInterface = ret; |
|
|
|
std_ac_if_desc.bInterfaceNumber = ret; |
|
uac2->ac_intf = ret; |
|
uac2->ac_alt = 0; |
|
|
|
if (EPOUT_EN(uac2_opts)) { |
|
ret = usb_interface_id(cfg, fn); |
|
if (ret < 0) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return ret; |
|
} |
|
std_as_out_if0_desc.bInterfaceNumber = ret; |
|
std_as_out_if1_desc.bInterfaceNumber = ret; |
|
uac2->as_out_intf = ret; |
|
uac2->as_out_alt = 0; |
|
} |
|
|
|
if (EPIN_EN(uac2_opts)) { |
|
ret = usb_interface_id(cfg, fn); |
|
if (ret < 0) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return ret; |
|
} |
|
std_as_in_if0_desc.bInterfaceNumber = ret; |
|
std_as_in_if1_desc.bInterfaceNumber = ret; |
|
uac2->as_in_intf = ret; |
|
uac2->as_in_alt = 0; |
|
} |
|
|
|
/* Calculate wMaxPacketSize according to audio bandwidth */ |
|
ret = set_ep_max_packet_size(uac2_opts, &fs_epin_desc, USB_SPEED_FULL, |
|
true); |
|
if (ret < 0) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return ret; |
|
} |
|
|
|
ret = set_ep_max_packet_size(uac2_opts, &fs_epout_desc, USB_SPEED_FULL, |
|
false); |
|
if (ret < 0) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return ret; |
|
} |
|
|
|
ret = set_ep_max_packet_size(uac2_opts, &hs_epin_desc, USB_SPEED_HIGH, |
|
true); |
|
if (ret < 0) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return ret; |
|
} |
|
|
|
ret = set_ep_max_packet_size(uac2_opts, &hs_epout_desc, USB_SPEED_HIGH, |
|
false); |
|
if (ret < 0) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return ret; |
|
} |
|
|
|
if (EPOUT_EN(uac2_opts)) { |
|
agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc); |
|
if (!agdev->out_ep) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return -ENODEV; |
|
} |
|
} |
|
|
|
if (EPIN_EN(uac2_opts)) { |
|
agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc); |
|
if (!agdev->in_ep) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return -ENODEV; |
|
} |
|
} |
|
|
|
agdev->in_ep_maxpsize = max_t(u16, |
|
le16_to_cpu(fs_epin_desc.wMaxPacketSize), |
|
le16_to_cpu(hs_epin_desc.wMaxPacketSize)); |
|
agdev->out_ep_maxpsize = max_t(u16, |
|
le16_to_cpu(fs_epout_desc.wMaxPacketSize), |
|
le16_to_cpu(hs_epout_desc.wMaxPacketSize)); |
|
|
|
hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; |
|
hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; |
|
|
|
setup_descriptor(uac2_opts); |
|
|
|
ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, NULL, |
|
NULL); |
|
if (ret) |
|
return ret; |
|
|
|
agdev->gadget = gadget; |
|
|
|
agdev->params.p_chmask = uac2_opts->p_chmask; |
|
agdev->params.p_srate = uac2_opts->p_srate; |
|
agdev->params.p_ssize = uac2_opts->p_ssize; |
|
agdev->params.c_chmask = uac2_opts->c_chmask; |
|
agdev->params.c_srate = uac2_opts->c_srate; |
|
agdev->params.c_ssize = uac2_opts->c_ssize; |
|
agdev->params.req_number = uac2_opts->req_number; |
|
ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget"); |
|
if (ret) |
|
goto err_free_descs; |
|
return 0; |
|
|
|
err_free_descs: |
|
usb_free_all_descriptors(fn); |
|
agdev->gadget = NULL; |
|
return ret; |
|
} |
|
|
|
static int |
|
afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt) |
|
{ |
|
struct usb_composite_dev *cdev = fn->config->cdev; |
|
struct f_uac2 *uac2 = func_to_uac2(fn); |
|
struct usb_gadget *gadget = cdev->gadget; |
|
struct device *dev = &gadget->dev; |
|
int ret = 0; |
|
|
|
/* No i/f has more than 2 alt settings */ |
|
if (alt > 1) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return -EINVAL; |
|
} |
|
|
|
if (intf == uac2->ac_intf) { |
|
/* Control I/f has only 1 AltSetting - 0 */ |
|
if (alt) { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return -EINVAL; |
|
} |
|
return 0; |
|
} |
|
|
|
if (intf == uac2->as_out_intf) { |
|
uac2->as_out_alt = alt; |
|
|
|
if (alt) |
|
ret = u_audio_start_capture(&uac2->g_audio); |
|
else |
|
u_audio_stop_capture(&uac2->g_audio); |
|
} else if (intf == uac2->as_in_intf) { |
|
uac2->as_in_alt = alt; |
|
|
|
if (alt) |
|
ret = u_audio_start_playback(&uac2->g_audio); |
|
else |
|
u_audio_stop_playback(&uac2->g_audio); |
|
} else { |
|
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
|
return -EINVAL; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int |
|
afunc_get_alt(struct usb_function *fn, unsigned intf) |
|
{ |
|
struct f_uac2 *uac2 = func_to_uac2(fn); |
|
struct g_audio *agdev = func_to_g_audio(fn); |
|
|
|
if (intf == uac2->ac_intf) |
|
return uac2->ac_alt; |
|
else if (intf == uac2->as_out_intf) |
|
return uac2->as_out_alt; |
|
else if (intf == uac2->as_in_intf) |
|
return uac2->as_in_alt; |
|
else |
|
dev_err(&agdev->gadget->dev, |
|
"%s:%d Invalid Interface %d!\n", |
|
__func__, __LINE__, intf); |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static void |
|
afunc_disable(struct usb_function *fn) |
|
{ |
|
struct f_uac2 *uac2 = func_to_uac2(fn); |
|
|
|
uac2->as_in_alt = 0; |
|
uac2->as_out_alt = 0; |
|
u_audio_stop_capture(&uac2->g_audio); |
|
u_audio_stop_playback(&uac2->g_audio); |
|
} |
|
|
|
static int |
|
in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
|
{ |
|
struct usb_request *req = fn->config->cdev->req; |
|
struct g_audio *agdev = func_to_g_audio(fn); |
|
struct f_uac2_opts *opts; |
|
u16 w_length = le16_to_cpu(cr->wLength); |
|
u16 w_index = le16_to_cpu(cr->wIndex); |
|
u16 w_value = le16_to_cpu(cr->wValue); |
|
u8 entity_id = (w_index >> 8) & 0xff; |
|
u8 control_selector = w_value >> 8; |
|
int value = -EOPNOTSUPP; |
|
int p_srate, c_srate; |
|
|
|
opts = g_audio_to_uac2_opts(agdev); |
|
p_srate = opts->p_srate; |
|
c_srate = opts->c_srate; |
|
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { |
|
struct cntrl_cur_lay3 c; |
|
memset(&c, 0, sizeof(struct cntrl_cur_lay3)); |
|
|
|
if (entity_id == USB_IN_CLK_ID) |
|
c.dCUR = cpu_to_le32(p_srate); |
|
else if (entity_id == USB_OUT_CLK_ID) |
|
c.dCUR = cpu_to_le32(c_srate); |
|
|
|
value = min_t(unsigned, w_length, sizeof c); |
|
memcpy(req->buf, &c, value); |
|
} else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) { |
|
*(u8 *)req->buf = 1; |
|
value = min_t(unsigned, w_length, 1); |
|
} else { |
|
dev_err(&agdev->gadget->dev, |
|
"%s:%d control_selector=%d TODO!\n", |
|
__func__, __LINE__, control_selector); |
|
} |
|
|
|
return value; |
|
} |
|
|
|
static int |
|
in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
|
{ |
|
struct usb_request *req = fn->config->cdev->req; |
|
struct g_audio *agdev = func_to_g_audio(fn); |
|
struct f_uac2_opts *opts; |
|
u16 w_length = le16_to_cpu(cr->wLength); |
|
u16 w_index = le16_to_cpu(cr->wIndex); |
|
u16 w_value = le16_to_cpu(cr->wValue); |
|
u8 entity_id = (w_index >> 8) & 0xff; |
|
u8 control_selector = w_value >> 8; |
|
struct cntrl_range_lay3 r; |
|
int value = -EOPNOTSUPP; |
|
int p_srate, c_srate; |
|
|
|
opts = g_audio_to_uac2_opts(agdev); |
|
p_srate = opts->p_srate; |
|
c_srate = opts->c_srate; |
|
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { |
|
if (entity_id == USB_IN_CLK_ID) |
|
r.dMIN = cpu_to_le32(p_srate); |
|
else if (entity_id == USB_OUT_CLK_ID) |
|
r.dMIN = cpu_to_le32(c_srate); |
|
else |
|
return -EOPNOTSUPP; |
|
|
|
r.dMAX = r.dMIN; |
|
r.dRES = 0; |
|
r.wNumSubRanges = cpu_to_le16(1); |
|
|
|
value = min_t(unsigned, w_length, sizeof r); |
|
memcpy(req->buf, &r, value); |
|
} else { |
|
dev_err(&agdev->gadget->dev, |
|
"%s:%d control_selector=%d TODO!\n", |
|
__func__, __LINE__, control_selector); |
|
} |
|
|
|
return value; |
|
} |
|
|
|
static int |
|
ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
|
{ |
|
if (cr->bRequest == UAC2_CS_CUR) |
|
return in_rq_cur(fn, cr); |
|
else if (cr->bRequest == UAC2_CS_RANGE) |
|
return in_rq_range(fn, cr); |
|
else |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int |
|
out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
|
{ |
|
u16 w_length = le16_to_cpu(cr->wLength); |
|
u16 w_value = le16_to_cpu(cr->wValue); |
|
u8 control_selector = w_value >> 8; |
|
|
|
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) |
|
return w_length; |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int |
|
setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
|
{ |
|
struct f_uac2 *uac2 = func_to_uac2(fn); |
|
struct g_audio *agdev = func_to_g_audio(fn); |
|
u16 w_index = le16_to_cpu(cr->wIndex); |
|
u8 intf = w_index & 0xff; |
|
|
|
if (intf != uac2->ac_intf) { |
|
dev_err(&agdev->gadget->dev, |
|
"%s:%d Error!\n", __func__, __LINE__); |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
if (cr->bRequestType & USB_DIR_IN) |
|
return ac_rq_in(fn, cr); |
|
else if (cr->bRequest == UAC2_CS_CUR) |
|
return out_rq_cur(fn, cr); |
|
|
|
return -EOPNOTSUPP; |
|
} |
|
|
|
static int |
|
afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
|
{ |
|
struct usb_composite_dev *cdev = fn->config->cdev; |
|
struct g_audio *agdev = func_to_g_audio(fn); |
|
struct usb_request *req = cdev->req; |
|
u16 w_length = le16_to_cpu(cr->wLength); |
|
int value = -EOPNOTSUPP; |
|
|
|
/* Only Class specific requests are supposed to reach here */ |
|
if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) |
|
return -EOPNOTSUPP; |
|
|
|
if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE) |
|
value = setup_rq_inf(fn, cr); |
|
else |
|
dev_err(&agdev->gadget->dev, "%s:%d Error!\n", |
|
__func__, __LINE__); |
|
|
|
if (value >= 0) { |
|
req->length = value; |
|
req->zero = value < w_length; |
|
value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); |
|
if (value < 0) { |
|
dev_err(&agdev->gadget->dev, |
|
"%s:%d Error!\n", __func__, __LINE__); |
|
req->status = 0; |
|
} |
|
} |
|
|
|
return value; |
|
} |
|
|
|
static inline struct f_uac2_opts *to_f_uac2_opts(struct config_item *item) |
|
{ |
|
return container_of(to_config_group(item), struct f_uac2_opts, |
|
func_inst.group); |
|
} |
|
|
|
static void f_uac2_attr_release(struct config_item *item) |
|
{ |
|
struct f_uac2_opts *opts = to_f_uac2_opts(item); |
|
|
|
usb_put_function_instance(&opts->func_inst); |
|
} |
|
|
|
static struct configfs_item_operations f_uac2_item_ops = { |
|
.release = f_uac2_attr_release, |
|
}; |
|
|
|
#define UAC2_ATTRIBUTE(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; \ |
|
\ |
|
mutex_lock(&opts->lock); \ |
|
result = sprintf(page, "%u\n", opts->name); \ |
|
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; \ |
|
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_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(c_ssize); |
|
UAC2_ATTRIBUTE(req_number); |
|
|
|
static struct configfs_attribute *f_uac2_attrs[] = { |
|
&f_uac2_opts_attr_p_chmask, |
|
&f_uac2_opts_attr_p_srate, |
|
&f_uac2_opts_attr_p_ssize, |
|
&f_uac2_opts_attr_c_chmask, |
|
&f_uac2_opts_attr_c_srate, |
|
&f_uac2_opts_attr_c_ssize, |
|
&f_uac2_opts_attr_req_number, |
|
NULL, |
|
}; |
|
|
|
static const struct config_item_type f_uac2_func_type = { |
|
.ct_item_ops = &f_uac2_item_ops, |
|
.ct_attrs = f_uac2_attrs, |
|
.ct_owner = THIS_MODULE, |
|
}; |
|
|
|
static void afunc_free_inst(struct usb_function_instance *f) |
|
{ |
|
struct f_uac2_opts *opts; |
|
|
|
opts = container_of(f, struct f_uac2_opts, func_inst); |
|
kfree(opts); |
|
} |
|
|
|
static struct usb_function_instance *afunc_alloc_inst(void) |
|
{ |
|
struct f_uac2_opts *opts; |
|
|
|
opts = kzalloc(sizeof(*opts), GFP_KERNEL); |
|
if (!opts) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
mutex_init(&opts->lock); |
|
opts->func_inst.free_func_inst = afunc_free_inst; |
|
|
|
config_group_init_type_name(&opts->func_inst.group, "", |
|
&f_uac2_func_type); |
|
|
|
opts->p_chmask = UAC2_DEF_PCHMASK; |
|
opts->p_srate = UAC2_DEF_PSRATE; |
|
opts->p_ssize = UAC2_DEF_PSSIZE; |
|
opts->c_chmask = UAC2_DEF_CCHMASK; |
|
opts->c_srate = UAC2_DEF_CSRATE; |
|
opts->c_ssize = UAC2_DEF_CSSIZE; |
|
opts->req_number = UAC2_DEF_REQ_NUM; |
|
return &opts->func_inst; |
|
} |
|
|
|
static void afunc_free(struct usb_function *f) |
|
{ |
|
struct g_audio *agdev; |
|
struct f_uac2_opts *opts; |
|
|
|
agdev = func_to_g_audio(f); |
|
opts = container_of(f->fi, struct f_uac2_opts, func_inst); |
|
kfree(agdev); |
|
mutex_lock(&opts->lock); |
|
--opts->refcnt; |
|
mutex_unlock(&opts->lock); |
|
} |
|
|
|
static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) |
|
{ |
|
struct g_audio *agdev = func_to_g_audio(f); |
|
|
|
g_audio_cleanup(agdev); |
|
usb_free_all_descriptors(f); |
|
|
|
agdev->gadget = NULL; |
|
} |
|
|
|
static struct usb_function *afunc_alloc(struct usb_function_instance *fi) |
|
{ |
|
struct f_uac2 *uac2; |
|
struct f_uac2_opts *opts; |
|
|
|
uac2 = kzalloc(sizeof(*uac2), GFP_KERNEL); |
|
if (uac2 == NULL) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
opts = container_of(fi, struct f_uac2_opts, func_inst); |
|
mutex_lock(&opts->lock); |
|
++opts->refcnt; |
|
mutex_unlock(&opts->lock); |
|
|
|
uac2->g_audio.func.name = "uac2_func"; |
|
uac2->g_audio.func.bind = afunc_bind; |
|
uac2->g_audio.func.unbind = afunc_unbind; |
|
uac2->g_audio.func.set_alt = afunc_set_alt; |
|
uac2->g_audio.func.get_alt = afunc_get_alt; |
|
uac2->g_audio.func.disable = afunc_disable; |
|
uac2->g_audio.func.setup = afunc_setup; |
|
uac2->g_audio.func.free_func = afunc_free; |
|
|
|
return &uac2->g_audio.func; |
|
} |
|
|
|
DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("Yadwinder Singh"); |
|
MODULE_AUTHOR("Jaswinder Singh");
|
|
|