mirror of https://github.com/OpenIPC/firmware.git
1024 lines
27 KiB
Diff
1024 lines
27 KiB
Diff
--- linux-4.9.37/drivers/usb/gadget/function/f_uac1_legacy.c 1970-01-01 03:00:00.000000000 +0300
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+++ linux-4.9.y/drivers/usb/gadget/function/f_uac1_legacy.c 2021-06-07 13:01:34.000000000 +0300
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@@ -0,0 +1,1020 @@
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+/*
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+ * f_audio.c -- USB Audio class function driver
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+ *
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+ * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org>
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+ * Copyright (C) 2008 Analog Devices, Inc
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+ *
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+ * Enter bugs at http://blackfin.uclinux.org/
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+ *
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+ * Licensed under the GPL-2 or later.
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+ */
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+#include <linux/slab.h>
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/device.h>
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+#include <linux/atomic.h>
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+
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+#include "u_uac1_legacy.h"
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+
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+static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value);
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+static int generic_get_cmd(struct usb_audio_control *con, u8 cmd);
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+
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+/*
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+ * DESCRIPTORS ... most are static, but strings and full
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+ * configuration descriptors are built on demand.
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+ */
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+
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+/*
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+ * We have two interfaces- AudioControl and AudioStreaming
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+ * TODO: only supcard playback currently
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+ */
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+#define F_AUDIO_AC_INTERFACE 0
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+#define F_AUDIO_AS_INTERFACE 1
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+#define F_AUDIO_NUM_INTERFACES 1
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+
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+/* B.3.1 Standard AC Interface Descriptor */
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+static struct usb_interface_descriptor ac_interface_desc = {
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+ .bLength = USB_DT_INTERFACE_SIZE,
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+ .bDescriptorType = USB_DT_INTERFACE,
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+ .bNumEndpoints = 0,
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+ .bInterfaceClass = USB_CLASS_AUDIO,
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+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
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+};
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+
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+/*
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+ * The number of AudioStreaming and MIDIStreaming interfaces
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+ * in the Audio Interface Collection
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+ */
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+DECLARE_UAC_AC_HEADER_DESCRIPTOR(1);
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+
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+#define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES)
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+/* 1 input terminal, 1 output terminal and 1 feature unit */
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+#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \
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+ + UAC_DT_OUTPUT_TERMINAL_SIZE + UAC_DT_FEATURE_UNIT_SIZE(0))
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+/* B.3.2 Class-Specific AC Interface Descriptor */
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+static struct uac1_ac_header_descriptor_1 ac_header_desc = {
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+ .bLength = UAC_DT_AC_HEADER_LENGTH,
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+ .bDescriptorType = USB_DT_CS_INTERFACE,
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+ .bDescriptorSubtype = UAC_HEADER,
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+ .bcdADC = __constant_cpu_to_le16(0x0100),
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+ .wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH),
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+ .bInCollection = F_AUDIO_NUM_INTERFACES,
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+ .baInterfaceNr = {
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+ /* Interface number of the first AudioStream interface */
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+ [0] = 1,
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+ }
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+};
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+
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+#define INPUT_TERMINAL_ID 1
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+static struct uac_input_terminal_descriptor input_terminal_desc = {
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+ .bLength = UAC_DT_INPUT_TERMINAL_SIZE,
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+ .bDescriptorType = USB_DT_CS_INTERFACE,
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+ .bDescriptorSubtype = UAC_INPUT_TERMINAL,
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+ .bTerminalID = INPUT_TERMINAL_ID,
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+ .wTerminalType = UAC_TERMINAL_STREAMING,
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+ .bAssocTerminal = 0,
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+ .wChannelConfig = 0x3,
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+};
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+
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+DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0);
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+
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+#define FEATURE_UNIT_ID 2
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+static struct uac_feature_unit_descriptor_0 feature_unit_desc = {
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+ .bLength = UAC_DT_FEATURE_UNIT_SIZE(0),
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+ .bDescriptorType = USB_DT_CS_INTERFACE,
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+ .bDescriptorSubtype = UAC_FEATURE_UNIT,
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+ .bUnitID = FEATURE_UNIT_ID,
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+ .bSourceID = INPUT_TERMINAL_ID,
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+ .bControlSize = 2,
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+ .bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME),
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+};
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+
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+static struct usb_audio_control mute_control = {
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+ .list = LIST_HEAD_INIT(mute_control.list),
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+ .name = "Mute Control",
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+ .type = UAC_FU_MUTE,
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+ /* Todo: add real Mute control code */
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+ .set = generic_set_cmd,
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+ .get = generic_get_cmd,
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+};
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+
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+static struct usb_audio_control volume_control = {
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+ .list = LIST_HEAD_INIT(volume_control.list),
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+ .name = "Volume Control",
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+ .type = UAC_FU_VOLUME,
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+ /* Todo: add real Volume control code */
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+ .set = generic_set_cmd,
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+ .get = generic_get_cmd,
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+};
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+
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+static struct usb_audio_control_selector feature_unit = {
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+ .list = LIST_HEAD_INIT(feature_unit.list),
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+ .id = FEATURE_UNIT_ID,
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+ .name = "Mute & Volume Control",
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+ .type = UAC_FEATURE_UNIT,
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+ .desc = (struct usb_descriptor_header *)&feature_unit_desc,
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+};
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+
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+#define OUTPUT_TERMINAL_ID 3
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+static struct uac1_output_terminal_descriptor output_terminal_desc = {
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+ .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE,
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+ .bDescriptorType = USB_DT_CS_INTERFACE,
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+ .bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
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+ .bTerminalID = OUTPUT_TERMINAL_ID,
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+ .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER,
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+ .bAssocTerminal = FEATURE_UNIT_ID,
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+ .bSourceID = FEATURE_UNIT_ID,
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+};
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+
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+/* B.4.1 Standard AS Interface Descriptor */
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+static struct usb_interface_descriptor as_interface_alt_0_desc = {
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+ .bLength = USB_DT_INTERFACE_SIZE,
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+ .bDescriptorType = USB_DT_INTERFACE,
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+ .bAlternateSetting = 0,
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+ .bNumEndpoints = 0,
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+ .bInterfaceClass = USB_CLASS_AUDIO,
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+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
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+};
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+
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+static struct usb_interface_descriptor as_interface_alt_1_desc = {
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+ .bLength = USB_DT_INTERFACE_SIZE,
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+ .bDescriptorType = USB_DT_INTERFACE,
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+ .bAlternateSetting = 1,
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+ .bNumEndpoints = 1,
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+ .bInterfaceClass = USB_CLASS_AUDIO,
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+ .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING,
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+};
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+
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+/* B.4.2 Class-Specific AS Interface Descriptor */
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+static struct uac1_as_header_descriptor as_header_desc = {
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+ .bLength = UAC_DT_AS_HEADER_SIZE,
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+ .bDescriptorType = USB_DT_CS_INTERFACE,
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+ .bDescriptorSubtype = UAC_AS_GENERAL,
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+ .bTerminalLink = INPUT_TERMINAL_ID,
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+ .bDelay = 1,
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+ .wFormatTag = UAC_FORMAT_TYPE_I_PCM,
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+};
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+
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+DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1);
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+
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+static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = {
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+ .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1),
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+ .bDescriptorType = USB_DT_CS_INTERFACE,
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+ .bDescriptorSubtype = UAC_FORMAT_TYPE,
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+ .bFormatType = UAC_FORMAT_TYPE_I,
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+ .bSubframeSize = 2,
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+ .bBitResolution = 16,
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+ .bSamFreqType = 1,
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+};
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+
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+/* Standard ISO OUT Endpoint Descriptor */
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+static struct usb_endpoint_descriptor as_out_ep_desc = {
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+ .bLength = USB_DT_ENDPOINT_AUDIO_SIZE,
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+ .bDescriptorType = USB_DT_ENDPOINT,
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+ .bEndpointAddress = USB_DIR_OUT,
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+ .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE
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+ | USB_ENDPOINT_XFER_ISOC,
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+ .wMaxPacketSize = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE),
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+ .bInterval = 4,
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+};
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+
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+/* Class-specific AS ISO OUT Endpoint Descriptor */
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+static struct uac_iso_endpoint_descriptor as_iso_out_desc = {
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+ .bLength = UAC_ISO_ENDPOINT_DESC_SIZE,
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+ .bDescriptorType = USB_DT_CS_ENDPOINT,
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+ .bDescriptorSubtype = UAC_EP_GENERAL,
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+ .bmAttributes = 1,
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+ .bLockDelayUnits = 1,
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+ .wLockDelay = __constant_cpu_to_le16(1),
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+};
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+
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+static struct usb_descriptor_header *f_audio_desc[] = {
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+ (struct usb_descriptor_header *)&ac_interface_desc,
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+ (struct usb_descriptor_header *)&ac_header_desc,
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+
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+ (struct usb_descriptor_header *)&input_terminal_desc,
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+ (struct usb_descriptor_header *)&output_terminal_desc,
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+ (struct usb_descriptor_header *)&feature_unit_desc,
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+
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+ (struct usb_descriptor_header *)&as_interface_alt_0_desc,
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+ (struct usb_descriptor_header *)&as_interface_alt_1_desc,
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+ (struct usb_descriptor_header *)&as_header_desc,
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+
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+ (struct usb_descriptor_header *)&as_type_i_desc,
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+
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+ (struct usb_descriptor_header *)&as_out_ep_desc,
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+ (struct usb_descriptor_header *)&as_iso_out_desc,
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+ NULL,
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+};
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+
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+enum {
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+ STR_AC_IF,
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+ STR_INPUT_TERMINAL,
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+ STR_INPUT_TERMINAL_CH_NAMES,
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+ STR_FEAT_DESC_0,
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+ STR_OUTPUT_TERMINAL,
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+ STR_AS_IF_ALT0,
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+ STR_AS_IF_ALT1,
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+};
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+
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+static struct usb_string strings_uac1[] = {
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+ [STR_AC_IF].s = "AC Interface",
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+ [STR_INPUT_TERMINAL].s = "Input terminal",
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+ [STR_INPUT_TERMINAL_CH_NAMES].s = "Channels",
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+ [STR_FEAT_DESC_0].s = "Volume control & mute",
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+ [STR_OUTPUT_TERMINAL].s = "Output terminal",
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+ [STR_AS_IF_ALT0].s = "AS Interface",
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+ [STR_AS_IF_ALT1].s = "AS Interface",
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+ { },
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+};
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+
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+static struct usb_gadget_strings str_uac1 = {
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+ .language = 0x0409, /* en-us */
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+ .strings = strings_uac1,
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+};
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+
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+static struct usb_gadget_strings *uac1_strings[] = {
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+ &str_uac1,
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+ NULL,
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+};
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+
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+/*
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+ * This function is an ALSA sound card following USB Audio Class Spec 1.0.
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+ */
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+
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+/*-------------------------------------------------------------------------*/
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+struct f_audio_buf {
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+ u8 *buf;
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+ int actual;
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+ struct list_head list;
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+};
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+
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+static struct f_audio_buf *f_audio_buffer_alloc(int buf_size)
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+{
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+ struct f_audio_buf *copy_buf;
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+
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+ copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC);
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+ if (!copy_buf)
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+ return ERR_PTR(-ENOMEM);
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+
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+ copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC);
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+ if (!copy_buf->buf) {
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+ kfree(copy_buf);
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+ return ERR_PTR(-ENOMEM);
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+ }
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+
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+ return copy_buf;
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+}
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+
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+static void f_audio_buffer_free(struct f_audio_buf *audio_buf)
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+{
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+ kfree(audio_buf->buf);
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+ kfree(audio_buf);
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+}
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+/*-------------------------------------------------------------------------*/
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+
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+struct f_audio {
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+ struct gaudio card;
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+
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+ u8 ac_intf, ac_alt;
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+ u8 as_intf, as_alt;
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+
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+ /* endpoints handle full and/or high speeds */
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+ struct usb_ep *out_ep;
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+
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+ spinlock_t lock;
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+ struct f_audio_buf *copy_buf;
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+ struct work_struct playback_work;
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+ struct list_head play_queue;
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+
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+ /* Control Set command */
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+ struct list_head cs;
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+ u8 set_cmd;
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+ struct usb_audio_control *set_con;
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+};
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+
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+static inline struct f_audio *func_to_audio(struct usb_function *f)
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+{
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+ return container_of(f, struct f_audio, card.func);
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+}
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+
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+/*-------------------------------------------------------------------------*/
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+
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+static void f_audio_playback_work(struct work_struct *data)
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+{
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+ struct f_audio *audio = container_of(data, struct f_audio,
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+ playback_work);
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+ struct f_audio_buf *play_buf;
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+
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+ spin_lock_irq(&audio->lock);
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+ if (list_empty(&audio->play_queue)) {
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+ spin_unlock_irq(&audio->lock);
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+ return;
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+ }
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+ play_buf = list_first_entry(&audio->play_queue,
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+ struct f_audio_buf, list);
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+ list_del(&play_buf->list);
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+ spin_unlock_irq(&audio->lock);
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+
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+ u_audio_playback(&audio->card, play_buf->buf, play_buf->actual);
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+ f_audio_buffer_free(play_buf);
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+}
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+
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+static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req)
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+{
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+ struct f_audio *audio = req->context;
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+ struct usb_composite_dev *cdev = audio->card.func.config->cdev;
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+ struct f_audio_buf *copy_buf = audio->copy_buf;
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+ struct f_uac1_legacy_opts *opts;
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+ int audio_buf_size;
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+ int err;
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+
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+ opts = container_of(audio->card.func.fi, struct f_uac1_legacy_opts,
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+ func_inst);
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+ audio_buf_size = opts->audio_buf_size;
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+
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+ if (!copy_buf)
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+ return -EINVAL;
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+
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+ /* Copy buffer is full, add it to the play_queue */
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+ if (audio_buf_size - copy_buf->actual < req->actual) {
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+ list_add_tail(©_buf->list, &audio->play_queue);
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+ schedule_work(&audio->playback_work);
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+ copy_buf = f_audio_buffer_alloc(audio_buf_size);
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+ if (IS_ERR(copy_buf))
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+ return -ENOMEM;
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+ }
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+
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+ memcpy(copy_buf->buf + copy_buf->actual, req->buf, req->actual);
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+ copy_buf->actual += req->actual;
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+ audio->copy_buf = copy_buf;
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+
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+ err = usb_ep_queue(ep, req, GFP_ATOMIC);
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+ if (err)
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+ ERROR(cdev, "%s queue req: %d\n", ep->name, err);
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+
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+ return 0;
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+
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+}
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+
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+static void f_audio_complete(struct usb_ep *ep, struct usb_request *req)
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+{
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+ struct f_audio *audio = req->context;
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+ int status = req->status;
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+ u32 data = 0;
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+ struct usb_ep *out_ep = audio->out_ep;
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+
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+ switch (status) {
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+
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+ case 0: /* normal completion? */
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+ if (ep == out_ep)
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+ f_audio_out_ep_complete(ep, req);
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+ else if (audio->set_con) {
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+ memcpy(&data, req->buf, req->length);
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+ audio->set_con->set(audio->set_con, audio->set_cmd,
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+ le16_to_cpu(data));
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+ audio->set_con = NULL;
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+ }
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+ break;
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+ default:
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+ break;
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+ }
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+}
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+
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+static int audio_set_intf_req(struct usb_function *f,
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+ const struct usb_ctrlrequest *ctrl)
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+{
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+ struct f_audio *audio = func_to_audio(f);
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+ struct usb_composite_dev *cdev = f->config->cdev;
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+ struct usb_request *req = cdev->req;
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+ u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
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+ u16 len = le16_to_cpu(ctrl->wLength);
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+ u16 w_value = le16_to_cpu(ctrl->wValue);
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+ u8 con_sel = (w_value >> 8) & 0xFF;
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+ u8 cmd = (ctrl->bRequest & 0x0F);
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+ struct usb_audio_control_selector *cs;
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+ struct usb_audio_control *con;
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+
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+ DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
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+ ctrl->bRequest, w_value, len, id);
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+
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+ list_for_each_entry(cs, &audio->cs, list) {
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+ if (cs->id == id) {
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+ list_for_each_entry(con, &cs->control, list) {
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+ if (con->type == con_sel) {
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+ audio->set_con = con;
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+ break;
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+ }
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+ }
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+ break;
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+ }
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+ }
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+
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+ audio->set_cmd = cmd;
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+ req->context = audio;
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+ req->complete = f_audio_complete;
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+
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+ return len;
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+}
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+
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+static int audio_get_intf_req(struct usb_function *f,
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+ const struct usb_ctrlrequest *ctrl)
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+{
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+ struct f_audio *audio = func_to_audio(f);
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+ struct usb_composite_dev *cdev = f->config->cdev;
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+ struct usb_request *req = cdev->req;
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+ int value = -EOPNOTSUPP;
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+ u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF);
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+ u16 len = le16_to_cpu(ctrl->wLength);
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+ u16 w_value = le16_to_cpu(ctrl->wValue);
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+ u8 con_sel = (w_value >> 8) & 0xFF;
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+ u8 cmd = (ctrl->bRequest & 0x0F);
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+ struct usb_audio_control_selector *cs;
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+ struct usb_audio_control *con;
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+
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+ DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n",
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+ ctrl->bRequest, w_value, len, id);
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+
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+ list_for_each_entry(cs, &audio->cs, list) {
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+ 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().
|
|
+ */
|
|
+ switch (ctrl->bRequestType) {
|
|
+ case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
|
|
+ value = audio_set_intf_req(f, ctrl);
|
|
+ break;
|
|
+
|
|
+ case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE:
|
|
+ value = audio_get_intf_req(f, ctrl);
|
|
+ break;
|
|
+
|
|
+ case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
|
|
+ value = audio_set_endpoint_req(f, ctrl);
|
|
+ break;
|
|
+
|
|
+ case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT:
|
|
+ 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_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_ep *out_ep = audio->out_ep;
|
|
+ struct usb_request *req;
|
|
+ struct f_uac1_legacy_opts *opts;
|
|
+ int req_buf_size, req_count, audio_buf_size;
|
|
+ int i = 0, err = 0;
|
|
+
|
|
+ DBG(cdev, "intf %d, alt %d\n", intf, alt);
|
|
+
|
|
+ opts = container_of(f->fi, struct f_uac1_legacy_opts, func_inst);
|
|
+ req_buf_size = opts->req_buf_size;
|
|
+ req_count = opts->req_count;
|
|
+ audio_buf_size = opts->audio_buf_size;
|
|
+
|
|
+ /* No i/f has more than 2 alt settings */
|
|
+ if (alt > 1) {
|
|
+ ERROR(cdev, "%s:%d Error!\n", __func__, __LINE__);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+
|
|
+ if (intf == audio->ac_intf) {
|
|
+ /* Control I/f has only 1 AltSetting - 0 */
|
|
+ if (alt) {
|
|
+ ERROR(cdev, "%s:%d Error!\n", __func__, __LINE__);
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ return 0;
|
|
+ } else if (intf == audio->as_intf) {
|
|
+ if (alt == 1) {
|
|
+ err = config_ep_by_speed(cdev->gadget, f, out_ep);
|
|
+ if (err)
|
|
+ return err;
|
|
+
|
|
+ usb_ep_enable(out_ep);
|
|
+ audio->copy_buf = f_audio_buffer_alloc(audio_buf_size);
|
|
+ if (IS_ERR(audio->copy_buf))
|
|
+ return -ENOMEM;
|
|
+
|
|
+ /*
|
|
+ * allocate a bunch of read buffers
|
|
+ * and queue them all at once.
|
|
+ */
|
|
+ for (i = 0; i < req_count && err == 0; i++) {
|
|
+ req = usb_ep_alloc_request(out_ep, GFP_ATOMIC);
|
|
+ if (req) {
|
|
+ req->buf = kzalloc(req_buf_size,
|
|
+ GFP_ATOMIC);
|
|
+ if (req->buf) {
|
|
+ req->length = 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;
|
|
+ }
|
|
+
|
|
+ } else {
|
|
+ struct f_audio_buf *copy_buf = audio->copy_buf;
|
|
+ if (copy_buf) {
|
|
+ list_add_tail(©_buf->list,
|
|
+ &audio->play_queue);
|
|
+ schedule_work(&audio->playback_work);
|
|
+ }
|
|
+ }
|
|
+ audio->as_alt = alt;
|
|
+ }
|
|
+
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int f_audio_get_alt(struct usb_function *f, unsigned intf)
|
|
+{
|
|
+ struct f_audio *audio = func_to_audio(f);
|
|
+ struct usb_composite_dev *cdev = f->config->cdev;
|
|
+
|
|
+ if (intf == audio->ac_intf)
|
|
+ return audio->ac_alt;
|
|
+ else if (intf == audio->as_intf)
|
|
+ return audio->as_alt;
|
|
+ else
|
|
+ ERROR(cdev, "%s:%d Invalid Interface %d!\n",
|
|
+ __func__, __LINE__, intf);
|
|
+
|
|
+ return -EINVAL;
|
|
+}
|
|
+
|
|
+static void f_audio_disable(struct usb_function *f)
|
|
+{
|
|
+ return;
|
|
+}
|
|
+
|
|
+/*-------------------------------------------------------------------------*/
|
|
+
|
|
+static void f_audio_build_desc(struct f_audio *audio)
|
|
+{
|
|
+ struct gaudio *card = &audio->card;
|
|
+ u8 *sam_freq;
|
|
+ int rate;
|
|
+
|
|
+ /* Set channel numbers */
|
|
+ input_terminal_desc.bNrChannels = u_audio_get_playback_channels(card);
|
|
+ as_type_i_desc.bNrChannels = u_audio_get_playback_channels(card);
|
|
+
|
|
+ /* Set sample rates */
|
|
+ rate = u_audio_get_playback_rate(card);
|
|
+ sam_freq = as_type_i_desc.tSamFreq[0];
|
|
+ memcpy(sam_freq, &rate, 3);
|
|
+
|
|
+ /* 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;
|
|
+ struct usb_ep *ep = NULL;
|
|
+ struct f_uac1_legacy_opts *audio_opts;
|
|
+
|
|
+ audio_opts = container_of(f->fi, struct f_uac1_legacy_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;
|
|
+ }
|
|
+ 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;
|
|
+ input_terminal_desc.iTerminal = us[STR_INPUT_TERMINAL].id;
|
|
+ input_terminal_desc.iChannelNames = us[STR_INPUT_TERMINAL_CH_NAMES].id;
|
|
+ feature_unit_desc.iFeature = us[STR_FEAT_DESC_0].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;
|
|
+
|
|
+
|
|
+ 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->ac_intf = status;
|
|
+ audio->ac_alt = 0;
|
|
+
|
|
+ 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;
|
|
+ audio->as_intf = status;
|
|
+ audio->as_alt = 0;
|
|
+
|
|
+ status = -ENODEV;
|
|
+
|
|
+ /* allocate instance-specific endpoints */
|
|
+ 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;
|
|
+
|
|
+ status = -ENOMEM;
|
|
+
|
|
+ /* 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];
|
|
+}
|
|
+
|
|
+/* Todo: add more control selecotor dynamically */
|
|
+static int control_selector_init(struct f_audio *audio)
|
|
+{
|
|
+ INIT_LIST_HEAD(&audio->cs);
|
|
+ list_add(&feature_unit.list, &audio->cs);
|
|
+
|
|
+ INIT_LIST_HEAD(&feature_unit.control);
|
|
+ list_add(&mute_control.list, &feature_unit.control);
|
|
+ list_add(&volume_control.list, &feature_unit.control);
|
|
+
|
|
+ volume_control.data[UAC__CUR] = 0xffc0;
|
|
+ volume_control.data[UAC__MIN] = 0xe3a0;
|
|
+ volume_control.data[UAC__MAX] = 0xfff0;
|
|
+ volume_control.data[UAC__RES] = 0x0030;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static inline
|
|
+struct f_uac1_legacy_opts *to_f_uac1_opts(struct config_item *item)
|
|
+{
|
|
+ return container_of(to_config_group(item), struct f_uac1_legacy_opts,
|
|
+ func_inst.group);
|
|
+}
|
|
+
|
|
+static void f_uac1_attr_release(struct config_item *item)
|
|
+{
|
|
+ struct f_uac1_legacy_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_legacy_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_legacy_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(req_buf_size);
|
|
+UAC1_INT_ATTRIBUTE(req_count);
|
|
+UAC1_INT_ATTRIBUTE(audio_buf_size);
|
|
+
|
|
+#define UAC1_STR_ATTRIBUTE(name) \
|
|
+static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \
|
|
+ char *page) \
|
|
+{ \
|
|
+ struct f_uac1_legacy_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_legacy_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_req_buf_size,
|
|
+ &f_uac1_opts_attr_req_count,
|
|
+ &f_uac1_opts_attr_audio_buf_size,
|
|
+ &f_uac1_opts_attr_fn_play,
|
|
+ &f_uac1_opts_attr_fn_cap,
|
|
+ &f_uac1_opts_attr_fn_cntl,
|
|
+ NULL,
|
|
+};
|
|
+
|
|
+static const 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_legacy_opts *opts;
|
|
+
|
|
+ opts = container_of(f, struct f_uac1_legacy_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_legacy_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->req_buf_size = UAC1_OUT_EP_MAX_PACKET_SIZE;
|
|
+ opts->req_count = UAC1_REQ_COUNT;
|
|
+ opts->audio_buf_size = UAC1_AUDIO_BUF_SIZE;
|
|
+ opts->fn_play = FILE_PCM_PLAYBACK;
|
|
+ opts->fn_cap = FILE_PCM_CAPTURE;
|
|
+ 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_legacy_opts *opts;
|
|
+
|
|
+ gaudio_cleanup(&audio->card);
|
|
+ opts = container_of(f->fi, struct f_uac1_legacy_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_legacy_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_legacy_opts, func_inst);
|
|
+ mutex_lock(&opts->lock);
|
|
+ ++opts->refcnt;
|
|
+ mutex_unlock(&opts->lock);
|
|
+ INIT_LIST_HEAD(&audio->play_queue);
|
|
+ spin_lock_init(&audio->lock);
|
|
+
|
|
+ audio->card.func.bind = f_audio_bind;
|
|
+ audio->card.func.unbind = f_audio_unbind;
|
|
+ audio->card.func.set_alt = f_audio_set_alt;
|
|
+ audio->card.func.get_alt = f_audio_get_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);
|
|
+
|
|
+ INIT_WORK(&audio->playback_work, f_audio_playback_work);
|
|
+
|
|
+ return &audio->card.func;
|
|
+}
|
|
+
|
|
+DECLARE_USB_FUNCTION_INIT(uac1_legacy, f_audio_alloc_inst, f_audio_alloc);
|
|
+MODULE_LICENSE("GPL");
|
|
+MODULE_AUTHOR("Bryan Wu");
|