| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * f_uac1.c -- USB Audio Class 1.0 Function (using u_audio API) |
| * |
| * Copyright (C) 2016 Ruslan Bilovol <ruslan.bilovol@gmail.com> |
| * Copyright (C) 2021 Julian Scheel <julian@jusst.de> |
| * |
| * This driver doesn't expect any real Audio codec to be present |
| * on the device - the audio streams are simply sinked to and |
| * sourced from a virtual ALSA sound card created. |
| * |
| * This file is based on f_uac1.c which is |
| * Copyright (C) 2008 Bryan Wu <cooloney@kernel.org> |
| * Copyright (C) 2008 Analog Devices, Inc |
| */ |
| |
| #include <linux/usb/audio.h> |
| #include <linux/module.h> |
| |
| #include "u_audio.h" |
| #include "u_uac1.h" |
| |
| /* UAC1 spec: 3.7.2.3 Audio Channel Cluster Format */ |
| #define UAC1_CHANNEL_MASK 0x0FFF |
| |
| #define USB_OUT_FU_ID (out_feature_unit_desc->bUnitID) |
| #define USB_IN_FU_ID (in_feature_unit_desc->bUnitID) |
| |
| #define EPIN_EN(_opts) ((_opts)->p_chmask != 0) |
| #define EPOUT_EN(_opts) ((_opts)->c_chmask != 0) |
| #define FUIN_EN(_opts) ((_opts)->p_mute_present \ |
| || (_opts)->p_volume_present) |
| #define FUOUT_EN(_opts) ((_opts)->c_mute_present \ |
| || (_opts)->c_volume_present) |
| |
| struct f_uac1 { |
| 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() */ |
| |
| struct usb_ctrlrequest setup_cr; /* will be used in data stage */ |
| |
| /* Interrupt IN endpoint of AC interface */ |
| struct usb_ep *int_ep; |
| atomic_t int_count; |
| int ctl_id; /* EP id */ |
| int c_srate; /* current capture srate */ |
| int p_srate; /* current playback prate */ |
| }; |
| |
| static inline struct f_uac1 *func_to_uac1(struct usb_function *f) |
| { |
| return container_of(f, struct f_uac1, g_audio.func); |
| } |
| |
| static inline struct f_uac1_opts *g_audio_to_uac1_opts(struct g_audio *audio) |
| { |
| return container_of(audio->func.fi, struct f_uac1_opts, func_inst); |
| } |
| |
| /* |
| * 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 |
| */ |
| |
| /* 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 = DYNAMIC */ |
| .bInterfaceClass = USB_CLASS_AUDIO, |
| .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, |
| }; |
| |
| /* B.3.2 Class-Specific AC Interface Descriptor */ |
| static struct uac1_ac_header_descriptor *ac_header_desc; |
| |
| 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 = DYNAMIC */ |
| .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), |
| .bAssocTerminal = 0, |
| .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 = DYNAMIC */ |
| .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER), |
| .bAssocTerminal = 0, |
| /* .bSourceID = DYNAMIC */ |
| }; |
| |
| 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 = DYNAMIC */ |
| .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE), |
| .bAssocTerminal = 0, |
| .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 = DYNAMIC */ |
| .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), |
| .bAssocTerminal = 0, |
| /* .bSourceID = DYNAMIC */ |
| }; |
| |
| static struct uac_feature_unit_descriptor *in_feature_unit_desc; |
| static struct uac_feature_unit_descriptor *out_feature_unit_desc; |
| |
| /* AC IN Interrupt Endpoint */ |
| static struct usb_endpoint_descriptor ac_int_ep_desc = { |
| .bLength = USB_DT_ENDPOINT_SIZE, |
| .bDescriptorType = USB_DT_ENDPOINT, |
| .bEndpointAddress = USB_DIR_IN, |
| .bmAttributes = USB_ENDPOINT_XFER_INT, |
| .wMaxPacketSize = cpu_to_le16(2), |
| .bInterval = 4, |
| }; |
| |
| /* 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, |
| }; |
| |
| 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, |
| }; |
| |
| /* 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 = DYNAMIC */ |
| .bDelay = 1, |
| .wFormatTag = cpu_to_le16(UAC_FORMAT_TYPE_I_PCM), |
| }; |
| |
| static struct uac1_as_header_descriptor as_in_header_desc = { |
| .bLength = UAC_DT_AS_HEADER_SIZE, |
| .bDescriptorType = USB_DT_CS_INTERFACE, |
| .bDescriptorSubtype = UAC_AS_GENERAL, |
| /* .bTerminalLink = DYNAMIC */ |
| .bDelay = 1, |
| .wFormatTag = cpu_to_le16(UAC_FORMAT_TYPE_I_PCM), |
| }; |
| |
| DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(UAC_MAX_RATES); |
| #define uac_format_type_i_discrete_descriptor \ |
| uac_format_type_i_discrete_descriptor_##UAC_MAX_RATES |
| |
| static struct uac_format_type_i_discrete_descriptor as_out_type_i_desc = { |
| .bLength = 0, /* filled on rate setup */ |
| .bDescriptorType = USB_DT_CS_INTERFACE, |
| .bDescriptorSubtype = UAC_FORMAT_TYPE, |
| .bFormatType = UAC_FORMAT_TYPE_I, |
| .bSubframeSize = 2, |
| .bBitResolution = 16, |
| .bSamFreqType = 0, /* filled on rate setup */ |
| }; |
| |
| /* 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, |
| .wMaxPacketSize = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE), |
| .bInterval = 4, |
| }; |
| |
| /* Class-specific AS ISO OUT Endpoint Descriptor */ |
| static struct uac_iso_endpoint_descriptor as_iso_out_desc = { |
| .bLength = UAC_ISO_ENDPOINT_DESC_SIZE, |
| .bDescriptorType = USB_DT_CS_ENDPOINT, |
| .bDescriptorSubtype = UAC_EP_GENERAL, |
| .bmAttributes = 1, |
| .bLockDelayUnits = 1, |
| .wLockDelay = cpu_to_le16(1), |
| }; |
| |
| static struct uac_format_type_i_discrete_descriptor as_in_type_i_desc = { |
| .bLength = 0, /* filled on rate setup */ |
| .bDescriptorType = USB_DT_CS_INTERFACE, |
| .bDescriptorSubtype = UAC_FORMAT_TYPE, |
| .bFormatType = UAC_FORMAT_TYPE_I, |
| .bSubframeSize = 2, |
| .bBitResolution = 16, |
| .bSamFreqType = 0, /* filled on rate setup */ |
| }; |
| |
| /* Standard ISO OUT Endpoint Descriptor */ |
| static struct usb_endpoint_descriptor as_in_ep_desc = { |
| .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, |
| .bDescriptorType = USB_DT_ENDPOINT, |
| .bEndpointAddress = USB_DIR_IN, |
| .bmAttributes = USB_ENDPOINT_SYNC_ASYNC |
| | USB_ENDPOINT_XFER_ISOC, |
| .wMaxPacketSize = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE), |
| .bInterval = 4, |
| }; |
| |
| /* Class-specific AS ISO OUT Endpoint Descriptor */ |
| static struct uac_iso_endpoint_descriptor as_iso_in_desc = { |
| .bLength = UAC_ISO_ENDPOINT_DESC_SIZE, |
| .bDescriptorType = USB_DT_CS_ENDPOINT, |
| .bDescriptorSubtype = UAC_EP_GENERAL, |
| .bmAttributes = 1, |
| .bLockDelayUnits = 0, |
| .wLockDelay = 0, |
| }; |
| |
| static struct usb_descriptor_header *f_audio_desc[] = { |
| (struct usb_descriptor_header *)&ac_interface_desc, |
| (struct usb_descriptor_header *)&ac_header_desc, |
| |
| (struct usb_descriptor_header *)&usb_out_it_desc, |
| (struct usb_descriptor_header *)&io_out_ot_desc, |
| (struct usb_descriptor_header *)&out_feature_unit_desc, |
| |
| (struct usb_descriptor_header *)&io_in_it_desc, |
| (struct usb_descriptor_header *)&usb_in_ot_desc, |
| (struct usb_descriptor_header *)&in_feature_unit_desc, |
| |
| (struct usb_descriptor_header *)&ac_int_ep_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, |
| }; |
| |
| /* Standard ISO OUT Endpoint Descriptor */ |
| static struct usb_endpoint_descriptor ss_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, |
| .wMaxPacketSize = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE), |
| .bInterval = 4, |
| }; |
| |
| static struct usb_ss_ep_comp_descriptor ss_as_out_ep_desc_comp = { |
| .bLength = sizeof(ss_as_out_ep_desc_comp), |
| .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, |
| .bMaxBurst = 0, |
| .bmAttributes = 0, |
| /* wBytesPerInterval = DYNAMIC */ |
| }; |
| |
| /* Standard ISO OUT Endpoint Descriptor */ |
| static struct usb_endpoint_descriptor ss_as_in_ep_desc = { |
| .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, |
| .bDescriptorType = USB_DT_ENDPOINT, |
| .bEndpointAddress = USB_DIR_IN, |
| .bmAttributes = USB_ENDPOINT_SYNC_ASYNC |
| | USB_ENDPOINT_XFER_ISOC, |
| .wMaxPacketSize = cpu_to_le16(UAC1_OUT_EP_MAX_PACKET_SIZE), |
| .bInterval = 4, |
| }; |
| |
| static struct usb_ss_ep_comp_descriptor ss_as_in_ep_desc_comp = { |
| .bLength = sizeof(ss_as_in_ep_desc_comp), |
| .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, |
| .bMaxBurst = 0, |
| .bmAttributes = 0, |
| /* wBytesPerInterval = DYNAMIC */ |
| }; |
| |
| static struct usb_descriptor_header *f_audio_ss_desc[] = { |
| (struct usb_descriptor_header *)&ac_interface_desc, |
| (struct usb_descriptor_header *)&ac_header_desc, |
| |
| (struct usb_descriptor_header *)&usb_out_it_desc, |
| (struct usb_descriptor_header *)&io_out_ot_desc, |
| (struct usb_descriptor_header *)&io_in_it_desc, |
| (struct usb_descriptor_header *)&usb_in_ot_desc, |
| |
| (struct usb_descriptor_header *)&as_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 *)&ss_as_out_ep_desc, |
| (struct usb_descriptor_header *)&ss_as_out_ep_desc_comp, |
| (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 *)&ss_as_in_ep_desc, |
| (struct usb_descriptor_header *)&ss_as_in_ep_desc_comp, |
| (struct usb_descriptor_header *)&as_iso_in_desc, |
| NULL, |
| }; |
| |
| enum { |
| STR_AC_IF, |
| STR_USB_OUT_IT, |
| STR_USB_OUT_IT_CH_NAMES, |
| STR_IO_OUT_OT, |
| STR_IO_IN_IT, |
| STR_IO_IN_IT_CH_NAMES, |
| STR_USB_IN_OT, |
| STR_FU_IN, |
| STR_FU_OUT, |
| STR_AS_OUT_IF_ALT0, |
| STR_AS_OUT_IF_ALT1, |
| STR_AS_IN_IF_ALT0, |
| STR_AS_IN_IF_ALT1, |
| NUM_STR_DESCRIPTORS, |
| }; |
| |
| static struct usb_string strings_uac1[NUM_STR_DESCRIPTORS + 1] = {}; |
| |
| 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. |
| */ |
| |
| static void uac_cs_attr_sample_rate(struct usb_ep *ep, struct usb_request *req) |
| { |
| struct usb_function *fn = ep->driver_data; |
| struct usb_composite_dev *cdev = fn->config->cdev; |
| struct g_audio *agdev = func_to_g_audio(fn); |
| struct f_uac1 *uac1 = func_to_uac1(fn); |
| u8 *buf = (u8 *)req->buf; |
| u32 val = 0; |
| |
| if (req->actual != 3) { |
| WARN(cdev, "Invalid data size for UAC_EP_CS_ATTR_SAMPLE_RATE.\n"); |
| return; |
| } |
| |
| val = buf[0] | (buf[1] << 8) | (buf[2] << 16); |
| if (uac1->ctl_id == (USB_DIR_IN | 2)) { |
| uac1->p_srate = val; |
| u_audio_set_playback_srate(agdev, uac1->p_srate); |
| } else if (uac1->ctl_id == (USB_DIR_OUT | 1)) { |
| uac1->c_srate = val; |
| u_audio_set_capture_srate(agdev, uac1->c_srate); |
| } |
| } |
| |
| static void audio_notify_complete(struct usb_ep *_ep, struct usb_request *req) |
| { |
| struct g_audio *audio = req->context; |
| struct f_uac1 *uac1 = func_to_uac1(&audio->func); |
| |
| atomic_dec(&uac1->int_count); |
| kfree(req->buf); |
| usb_ep_free_request(_ep, req); |
| } |
| |
| static int audio_notify(struct g_audio *audio, int unit_id, int cs) |
| { |
| struct f_uac1 *uac1 = func_to_uac1(&audio->func); |
| struct usb_request *req; |
| struct uac1_status_word *msg; |
| int ret; |
| |
| if (!uac1->int_ep->enabled) |
| return 0; |
| |
| if (atomic_inc_return(&uac1->int_count) > UAC1_DEF_INT_REQ_NUM) { |
| atomic_dec(&uac1->int_count); |
| return 0; |
| } |
| |
| req = usb_ep_alloc_request(uac1->int_ep, GFP_ATOMIC); |
| if (req == NULL) { |
| ret = -ENOMEM; |
| goto err_dec_int_count; |
| } |
| |
| msg = kmalloc(sizeof(*msg), GFP_ATOMIC); |
| if (msg == NULL) { |
| ret = -ENOMEM; |
| goto err_free_request; |
| } |
| |
| msg->bStatusType = UAC1_STATUS_TYPE_IRQ_PENDING |
| | UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF; |
| msg->bOriginator = unit_id; |
| |
| req->length = sizeof(*msg); |
| req->buf = msg; |
| req->context = audio; |
| req->complete = audio_notify_complete; |
| |
| ret = usb_ep_queue(uac1->int_ep, req, GFP_ATOMIC); |
| |
| if (ret) |
| goto err_free_msg; |
| |
| return 0; |
| |
| err_free_msg: |
| kfree(msg); |
| err_free_request: |
| usb_ep_free_request(uac1->int_ep, req); |
| err_dec_int_count: |
| atomic_dec(&uac1->int_count); |
| |
| return ret; |
| } |
| |
| 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 *audio = func_to_g_audio(fn); |
| struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio); |
| 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; |
| |
| if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || |
| (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { |
| unsigned int is_playback = 0; |
| |
| if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) |
| is_playback = 1; |
| |
| if (control_selector == UAC_FU_MUTE) { |
| unsigned int mute; |
| |
| u_audio_get_mute(audio, is_playback, &mute); |
| |
| *(u8 *)req->buf = mute; |
| value = min_t(unsigned int, w_length, 1); |
| } else if (control_selector == UAC_FU_VOLUME) { |
| __le16 c; |
| s16 volume; |
| |
| u_audio_get_volume(audio, is_playback, &volume); |
| |
| c = cpu_to_le16(volume); |
| |
| value = min_t(unsigned int, w_length, sizeof(c)); |
| memcpy(req->buf, &c, value); |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d control_selector=%d TODO!\n", |
| __func__, __LINE__, control_selector); |
| } |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d entity_id=%d control_selector=%d TODO!\n", |
| __func__, __LINE__, entity_id, control_selector); |
| } |
| |
| return value; |
| } |
| |
| static int |
| in_rq_min(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
| { |
| struct usb_request *req = fn->config->cdev->req; |
| struct g_audio *audio = func_to_g_audio(fn); |
| struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio); |
| 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; |
| |
| if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || |
| (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { |
| unsigned int is_playback = 0; |
| |
| if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) |
| is_playback = 1; |
| |
| if (control_selector == UAC_FU_VOLUME) { |
| __le16 r; |
| s16 min_db; |
| |
| if (is_playback) |
| min_db = opts->p_volume_min; |
| else |
| min_db = opts->c_volume_min; |
| |
| r = cpu_to_le16(min_db); |
| |
| value = min_t(unsigned int, w_length, sizeof(r)); |
| memcpy(req->buf, &r, value); |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d control_selector=%d TODO!\n", |
| __func__, __LINE__, control_selector); |
| } |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d entity_id=%d control_selector=%d TODO!\n", |
| __func__, __LINE__, entity_id, control_selector); |
| } |
| |
| return value; |
| } |
| |
| static int |
| in_rq_max(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
| { |
| struct usb_request *req = fn->config->cdev->req; |
| struct g_audio *audio = func_to_g_audio(fn); |
| struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio); |
| 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; |
| |
| if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || |
| (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { |
| unsigned int is_playback = 0; |
| |
| if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) |
| is_playback = 1; |
| |
| if (control_selector == UAC_FU_VOLUME) { |
| __le16 r; |
| s16 max_db; |
| |
| if (is_playback) |
| max_db = opts->p_volume_max; |
| else |
| max_db = opts->c_volume_max; |
| |
| r = cpu_to_le16(max_db); |
| |
| value = min_t(unsigned int, w_length, sizeof(r)); |
| memcpy(req->buf, &r, value); |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d control_selector=%d TODO!\n", |
| __func__, __LINE__, control_selector); |
| } |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d entity_id=%d control_selector=%d TODO!\n", |
| __func__, __LINE__, entity_id, control_selector); |
| } |
| |
| return value; |
| } |
| |
| static int |
| in_rq_res(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
| { |
| struct usb_request *req = fn->config->cdev->req; |
| struct g_audio *audio = func_to_g_audio(fn); |
| struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio); |
| 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; |
| |
| if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || |
| (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { |
| unsigned int is_playback = 0; |
| |
| if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) |
| is_playback = 1; |
| |
| if (control_selector == UAC_FU_VOLUME) { |
| __le16 r; |
| s16 res_db; |
| |
| if (is_playback) |
| res_db = opts->p_volume_res; |
| else |
| res_db = opts->c_volume_res; |
| |
| r = cpu_to_le16(res_db); |
| |
| value = min_t(unsigned int, w_length, sizeof(r)); |
| memcpy(req->buf, &r, value); |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d control_selector=%d TODO!\n", |
| __func__, __LINE__, control_selector); |
| } |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d entity_id=%d control_selector=%d TODO!\n", |
| __func__, __LINE__, entity_id, control_selector); |
| } |
| |
| return value; |
| } |
| |
| static void |
| out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req) |
| { |
| struct g_audio *audio = req->context; |
| struct usb_composite_dev *cdev = audio->func.config->cdev; |
| struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio); |
| struct f_uac1 *uac1 = func_to_uac1(&audio->func); |
| struct usb_ctrlrequest *cr = &uac1->setup_cr; |
| 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; |
| |
| if (req->status != 0) { |
| dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status); |
| return; |
| } |
| |
| if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || |
| (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { |
| unsigned int is_playback = 0; |
| |
| if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) |
| is_playback = 1; |
| |
| if (control_selector == UAC_FU_MUTE) { |
| u8 mute = *(u8 *)req->buf; |
| |
| u_audio_set_mute(audio, is_playback, mute); |
| |
| return; |
| } else if (control_selector == UAC_FU_VOLUME) { |
| __le16 *c = req->buf; |
| s16 volume; |
| |
| volume = le16_to_cpu(*c); |
| u_audio_set_volume(audio, is_playback, volume); |
| |
| return; |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d control_selector=%d TODO!\n", |
| __func__, __LINE__, control_selector); |
| usb_ep_set_halt(ep); |
| } |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d entity_id=%d control_selector=%d TODO!\n", |
| __func__, __LINE__, entity_id, control_selector); |
| usb_ep_set_halt(ep); |
| |
| } |
| } |
| |
| static int |
| out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) |
| { |
| struct usb_request *req = fn->config->cdev->req; |
| struct g_audio *audio = func_to_g_audio(fn); |
| struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio); |
| struct f_uac1 *uac1 = func_to_uac1(&audio->func); |
| 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; |
| |
| if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || |
| (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { |
| memcpy(&uac1->setup_cr, cr, sizeof(*cr)); |
| req->context = audio; |
| req->complete = out_rq_cur_complete; |
| |
| return w_length; |
| } else { |
| dev_err(&audio->gadget->dev, |
| "%s:%d entity_id=%d control_selector=%d TODO!\n", |
| __func__, __LINE__, entity_id, control_selector); |
| } |
| return -EOPNOTSUPP; |
| } |
| |
| static int ac_rq_in(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: |
| return in_rq_cur(f, ctrl); |
| case UAC_GET_MIN: |
| return in_rq_min(f, ctrl); |
| case UAC_GET_MAX: |
| return in_rq_max(f, ctrl); |
| case UAC_GET_RES: |
| return in_rq_res(f, ctrl); |
| case UAC_GET_MEM: |
| break; |
| case UAC_GET_STAT: |
| value = len; |
| break; |
| default: |
| break; |
| } |
| |
| return value; |
| } |
| |
| static int audio_set_endpoint_req(struct usb_function *f, |
| const struct usb_ctrlrequest *ctrl) |
| { |
| struct usb_composite_dev *cdev = f->config->cdev; |
| struct usb_request *req = f->config->cdev->req; |
| struct f_uac1 *uac1 = func_to_uac1(f); |
| 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); |
| u8 cs = w_value >> 8; |
| |
| 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: { |
| if (cs == UAC_EP_CS_ATTR_SAMPLE_RATE) { |
| cdev->gadget->ep0->driver_data = f; |
| uac1->ctl_id = ep; |
| req->complete = uac_cs_attr_sample_rate; |
| } |
| 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; |
| struct usb_request *req = f->config->cdev->req; |
| struct f_uac1 *uac1 = func_to_uac1(f); |
| u8 *buf = (u8 *)req->buf; |
| int value = -EOPNOTSUPP; |
| u8 ep = le16_to_cpu(ctrl->wIndex); |
| u16 len = le16_to_cpu(ctrl->wLength); |
| u16 w_value = le16_to_cpu(ctrl->wValue); |
| u8 cs = w_value >> 8; |
| u32 val = 0; |
| |
| 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: { |
| if (cs == UAC_EP_CS_ATTR_SAMPLE_RATE) { |
| if (ep == (USB_DIR_IN | 2)) |
| val = uac1->p_srate; |
| else if (ep == (USB_DIR_OUT | 1)) |
| val = uac1->c_srate; |
| buf[2] = (val >> 16) & 0xff; |
| buf[1] = (val >> 8) & 0xff; |
| buf[0] = val & 0xff; |
| } |
| value = len; |
| break; |
| } |
| 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_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; |
| case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE: |
| if (ctrl->bRequest == UAC_SET_CUR) |
| value = out_rq_cur(f, ctrl); |
| break; |
| case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE: |
| value = ac_rq_in(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 usb_composite_dev *cdev = f->config->cdev; |
| struct usb_gadget *gadget = cdev->gadget; |
| struct device *dev = &gadget->dev; |
| struct g_audio *audio = func_to_g_audio(f); |
| struct f_uac1 *uac1 = func_to_uac1(f); |
| 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 == uac1->ac_intf) { |
| /* Control I/f has only 1 AltSetting - 0 */ |
| if (alt) { |
| dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
| return -EINVAL; |
| } |
| |
| /* restart interrupt endpoint */ |
| if (uac1->int_ep) { |
| usb_ep_disable(uac1->int_ep); |
| config_ep_by_speed(gadget, &audio->func, uac1->int_ep); |
| usb_ep_enable(uac1->int_ep); |
| } |
| |
| return 0; |
| } |
| |
| if (intf == uac1->as_out_intf) { |
| uac1->as_out_alt = alt; |
| |
| if (alt) |
| ret = u_audio_start_capture(&uac1->g_audio); |
| else |
| u_audio_stop_capture(&uac1->g_audio); |
| } else if (intf == uac1->as_in_intf) { |
| uac1->as_in_alt = alt; |
| |
| if (alt) |
| ret = u_audio_start_playback(&uac1->g_audio); |
| else |
| u_audio_stop_playback(&uac1->g_audio); |
| } else { |
| dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); |
| return -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static int f_audio_get_alt(struct usb_function *f, unsigned intf) |
| { |
| struct usb_composite_dev *cdev = f->config->cdev; |
| struct usb_gadget *gadget = cdev->gadget; |
| struct device *dev = &gadget->dev; |
| struct f_uac1 *uac1 = func_to_uac1(f); |
| |
| if (intf == uac1->ac_intf) |
| return uac1->ac_alt; |
| else if (intf == uac1->as_out_intf) |
| return uac1->as_out_alt; |
| else if (intf == uac1->as_in_intf) |
| return uac1->as_in_alt; |
| else |
| dev_err(dev, "%s:%d Invalid Interface %d!\n", |
| __func__, __LINE__, intf); |
| |
| return -EINVAL; |
| } |
| |
| |
| static void f_audio_disable(struct usb_function *f) |
| { |
| struct f_uac1 *uac1 = func_to_uac1(f); |
| |
| uac1->as_out_alt = 0; |
| uac1->as_in_alt = 0; |
| |
| u_audio_stop_playback(&uac1->g_audio); |
| u_audio_stop_capture(&uac1->g_audio); |
| if (uac1->int_ep) |
| usb_ep_disable(uac1->int_ep); |
| } |
| |
| static void |
| f_audio_suspend(struct usb_function *f) |
| { |
| struct f_uac1 *uac1 = func_to_uac1(f); |
| |
| u_audio_suspend(&uac1->g_audio); |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| static struct uac_feature_unit_descriptor *build_fu_desc(int chmask) |
| { |
| struct uac_feature_unit_descriptor *fu_desc; |
| int channels = num_channels(chmask); |
| int fu_desc_size = UAC_DT_FEATURE_UNIT_SIZE(channels); |
| |
| fu_desc = kzalloc(fu_desc_size, GFP_KERNEL); |
| if (!fu_desc) |
| return NULL; |
| |
| fu_desc->bLength = fu_desc_size; |
| fu_desc->bDescriptorType = USB_DT_CS_INTERFACE; |
| |
| fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT; |
| fu_desc->bControlSize = 2; |
| |
| /* bUnitID, bSourceID and bmaControls will be defined later */ |
| |
| return fu_desc; |
| } |
| |
| /* B.3.2 Class-Specific AC Interface Descriptor */ |
| static struct |
| uac1_ac_header_descriptor *build_ac_header_desc(struct f_uac1_opts *opts) |
| { |
| struct uac1_ac_header_descriptor *ac_desc; |
| int ac_header_desc_size; |
| int num_ifaces = 0; |
| |
| if (EPOUT_EN(opts)) |
| num_ifaces++; |
| if (EPIN_EN(opts)) |
| num_ifaces++; |
| |
| ac_header_desc_size = UAC_DT_AC_HEADER_SIZE(num_ifaces); |
| |
| ac_desc = kzalloc(ac_header_desc_size, GFP_KERNEL); |
| if (!ac_desc) |
| return NULL; |
| |
| ac_desc->bLength = ac_header_desc_size; |
| ac_desc->bDescriptorType = USB_DT_CS_INTERFACE; |
| ac_desc->bDescriptorSubtype = UAC_HEADER; |
| ac_desc->bcdADC = cpu_to_le16(0x0100); |
| ac_desc->bInCollection = num_ifaces; |
| |
| /* wTotalLength and baInterfaceNr will be defined later */ |
| |
| return ac_desc; |
| } |
| |
| /* Use macro to overcome line length limitation */ |
| #define USBDHDR(p) (struct usb_descriptor_header *)(p) |
| |
| static void setup_descriptor(struct f_uac1_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 (FUOUT_EN(opts)) |
| out_feature_unit_desc->bUnitID = i++; |
| if (FUIN_EN(opts)) |
| in_feature_unit_desc->bUnitID = i++; |
| |
| if (FUIN_EN(opts)) { |
| usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID; |
| in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID; |
| } else { |
| usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID; |
| } |
| if (FUOUT_EN(opts)) { |
| io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID; |
| out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID; |
| } else { |
| io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID; |
| } |
| |
| as_out_header_desc.bTerminalLink = usb_out_it_desc.bTerminalID; |
| as_in_header_desc.bTerminalLink = usb_in_ot_desc.bTerminalID; |
| |
| ac_header_desc->wTotalLength = cpu_to_le16(ac_header_desc->bLength); |
| |
| if (EPIN_EN(opts)) { |
| u16 len = le16_to_cpu(ac_header_desc->wTotalLength); |
| |
| len += sizeof(usb_in_ot_desc); |
| len += sizeof(io_in_it_desc); |
| if (FUIN_EN(opts)) |
| len += in_feature_unit_desc->bLength; |
| ac_header_desc->wTotalLength = cpu_to_le16(len); |
| } |
| if (EPOUT_EN(opts)) { |
| u16 len = le16_to_cpu(ac_header_desc->wTotalLength); |
| |
| len += sizeof(usb_out_it_desc); |
| len += sizeof(io_out_ot_desc); |
| if (FUOUT_EN(opts)) |
| len += out_feature_unit_desc->bLength; |
| ac_header_desc->wTotalLength = cpu_to_le16(len); |
| } |
| |
| i = 0; |
| f_audio_desc[i++] = USBDHDR(&ac_interface_desc); |
| f_audio_desc[i++] = USBDHDR(ac_header_desc); |
| |
| if (EPOUT_EN(opts)) { |
| f_audio_desc[i++] = USBDHDR(&usb_out_it_desc); |
| f_audio_desc[i++] = USBDHDR(&io_out_ot_desc); |
| if (FUOUT_EN(opts)) |
| f_audio_desc[i++] = USBDHDR(out_feature_unit_desc); |
| } |
| |
| if (EPIN_EN(opts)) { |
| f_audio_desc[i++] = USBDHDR(&io_in_it_desc); |
| f_audio_desc[i++] = USBDHDR(&usb_in_ot_desc); |
| if (FUIN_EN(opts)) |
| f_audio_desc[i++] = USBDHDR(in_feature_unit_desc); |
| } |
| |
| if (FUOUT_EN(opts) || FUIN_EN(opts)) |
| f_audio_desc[i++] = USBDHDR(&ac_int_ep_desc); |
| |
| if (EPOUT_EN(opts)) { |
| f_audio_desc[i++] = USBDHDR(&as_out_interface_alt_0_desc); |
| f_audio_desc[i++] = USBDHDR(&as_out_interface_alt_1_desc); |
| f_audio_desc[i++] = USBDHDR(&as_out_header_desc); |
| f_audio_desc[i++] = USBDHDR(&as_out_type_i_desc); |
| f_audio_desc[i++] = USBDHDR(&as_out_ep_desc); |
| f_audio_desc[i++] = USBDHDR(&as_iso_out_desc); |
| } |
| if (EPIN_EN(opts)) { |
| f_audio_desc[i++] = USBDHDR(&as_in_interface_alt_0_desc); |
| f_audio_desc[i++] = USBDHDR(&as_in_interface_alt_1_desc); |
| f_audio_desc[i++] = USBDHDR(&as_in_header_desc); |
| f_audio_desc[i++] = USBDHDR(&as_in_type_i_desc); |
| f_audio_desc[i++] = USBDHDR(&as_in_ep_desc); |
| f_audio_desc[i++] = USBDHDR(&as_iso_in_desc); |
| } |
| f_audio_desc[i] = NULL; |
| } |
| |
| static int f_audio_validate_opts(struct g_audio *audio, struct device *dev) |
| { |
| struct f_uac1_opts *opts = g_audio_to_uac1_opts(audio); |
| |
| if (!opts->p_chmask && !opts->c_chmask) { |
| dev_err(dev, "Error: no playback and capture channels\n"); |
| return -EINVAL; |
| } else if (opts->p_chmask & ~UAC1_CHANNEL_MASK) { |
| dev_err(dev, "Error: unsupported playback channels mask\n"); |
| return -EINVAL; |
| } else if (opts->c_chmask & ~UAC1_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_srates[0]) { |
| dev_err(dev, "Error: incorrect playback sampling rate\n"); |
| return -EINVAL; |
| } else if (!opts->c_srates[0]) { |
| dev_err(dev, "Error: incorrect capture sampling rate\n"); |
| return -EINVAL; |
| } |
| |
| if (opts->p_volume_max <= opts->p_volume_min) { |
| dev_err(dev, "Error: incorrect playback volume max/min\n"); |
| return -EINVAL; |
| } else if (opts->c_volume_max <= opts->c_volume_min) { |
| dev_err(dev, "Error: incorrect capture volume max/min\n"); |
| return -EINVAL; |
| } else if (opts->p_volume_res <= 0) { |
| dev_err(dev, "Error: negative/zero playback volume resolution\n"); |
| return -EINVAL; |
| } else if (opts->c_volume_res <= 0) { |
| dev_err(dev, "Error: negative/zero capture volume resolution\n"); |
| return -EINVAL; |
| } |
| |
| if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) { |
| dev_err(dev, "Error: incorrect playback volume resolution\n"); |
| return -EINVAL; |
| } else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) { |
| dev_err(dev, "Error: incorrect capture volume resolution\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* 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 usb_gadget *gadget = cdev->gadget; |
| struct device *dev = &gadget->dev; |
| struct f_uac1 *uac1 = func_to_uac1(f); |
| struct g_audio *audio = func_to_g_audio(f); |
| struct f_uac1_opts *audio_opts; |
| struct usb_ep *ep = NULL; |
| struct usb_string *us; |
| int ba_iface_id; |
| int status; |
| int idx, i; |
| |
| status = f_audio_validate_opts(audio, dev); |
| if (status) |
| return status; |
| |
| audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst); |
| |
| strings_uac1[STR_AC_IF].s = audio_opts->function_name; |
| |
| strings_uac1[STR_USB_OUT_IT].s = audio_opts->c_it_name; |
| strings_uac1[STR_USB_OUT_IT_CH_NAMES].s = audio_opts->c_it_ch_name; |
| strings_uac1[STR_IO_OUT_OT].s = audio_opts->c_ot_name; |
| strings_uac1[STR_FU_OUT].s = audio_opts->c_fu_vol_name; |
| strings_uac1[STR_AS_OUT_IF_ALT0].s = "Playback Inactive"; |
| strings_uac1[STR_AS_OUT_IF_ALT1].s = "Playback Active"; |
| |
| strings_uac1[STR_IO_IN_IT].s = audio_opts->p_it_name; |
| strings_uac1[STR_IO_IN_IT_CH_NAMES].s = audio_opts->p_it_ch_name; |
| strings_uac1[STR_USB_IN_OT].s = audio_opts->p_ot_name; |
| strings_uac1[STR_FU_IN].s = audio_opts->p_fu_vol_name; |
| strings_uac1[STR_AS_IN_IF_ALT0].s = "Capture Inactive"; |
| strings_uac1[STR_AS_IN_IF_ALT1].s = "Capture Active"; |
| |
| us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1)); |
| if (IS_ERR(us)) |
| return PTR_ERR(us); |
| |
| ac_header_desc = build_ac_header_desc(audio_opts); |
| if (!ac_header_desc) |
| return -ENOMEM; |
| |
| if (FUOUT_EN(audio_opts)) { |
| out_feature_unit_desc = build_fu_desc(audio_opts->c_chmask); |
| if (!out_feature_unit_desc) { |
| status = -ENOMEM; |
| goto fail; |
| } |
| } |
| if (FUIN_EN(audio_opts)) { |
| in_feature_unit_desc = build_fu_desc(audio_opts->p_chmask); |
| if (!in_feature_unit_desc) { |
| status = -ENOMEM; |
| goto err_free_fu; |
| } |
| } |
| |
| 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; |
| 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; |
| |
| if (FUOUT_EN(audio_opts)) { |
| u8 *i_feature; |
| |
| i_feature = (u8 *)out_feature_unit_desc + |
| out_feature_unit_desc->bLength - 1; |
| *i_feature = us[STR_FU_OUT].id; |
| } |
| if (FUIN_EN(audio_opts)) { |
| u8 *i_feature; |
| |
| i_feature = (u8 *)in_feature_unit_desc + |
| in_feature_unit_desc->bLength - 1; |
| *i_feature = us[STR_FU_IN].id; |
| } |
| |
| /* Set channel numbers */ |
| usb_out_it_desc.bNrChannels = num_channels(audio_opts->c_chmask); |
| usb_out_it_desc.wChannelConfig = cpu_to_le16(audio_opts->c_chmask); |
| as_out_type_i_desc.bNrChannels = num_channels(audio_opts->c_chmask); |
| as_out_type_i_desc.bSubframeSize = audio_opts->c_ssize; |
| as_out_type_i_desc.bBitResolution = audio_opts->c_ssize * 8; |
| io_in_it_desc.bNrChannels = num_channels(audio_opts->p_chmask); |
| io_in_it_desc.wChannelConfig = cpu_to_le16(audio_opts->p_chmask); |
| as_in_type_i_desc.bNrChannels = num_channels(audio_opts->p_chmask); |
| as_in_type_i_desc.bSubframeSize = audio_opts->p_ssize; |
| as_in_type_i_desc.bBitResolution = audio_opts->p_ssize * 8; |
| |
| if (FUOUT_EN(audio_opts)) { |
| __le16 *bma = (__le16 *)&out_feature_unit_desc->bmaControls[0]; |
| u32 control = 0; |
| |
| if (audio_opts->c_mute_present) |
| control |= UAC_FU_MUTE; |
| if (audio_opts->c_volume_present) |
| control |= UAC_FU_VOLUME; |
| *bma = cpu_to_le16(control); |
| } |
| if (FUIN_EN(audio_opts)) { |
| __le16 *bma = (__le16 *)&in_feature_unit_desc->bmaControls[0]; |
| u32 control = 0; |
| |
| if (audio_opts->p_mute_present) |
| control |= UAC_FU_MUTE; |
| if (audio_opts->p_volume_present) |
| control |= UAC_FU_VOLUME; |
| *bma = cpu_to_le16(control); |
| } |
| |
| /* Set sample rates */ |
| for (i = 0, idx = 0; i < UAC_MAX_RATES; i++) { |
| if (audio_opts->c_srates[i] == 0) |
| break; |
| memcpy(as_out_type_i_desc.tSamFreq[idx++], |
| &audio_opts->c_srates[i], 3); |
| } |
| as_out_type_i_desc.bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(idx); |
| as_out_type_i_desc.bSamFreqType = idx; |
| |
| for (i = 0, idx = 0; i < UAC_MAX_RATES; i++) { |
| if (audio_opts->p_srates[i] == 0) |
| break; |
| memcpy(as_in_type_i_desc.tSamFreq[idx++], |
| &audio_opts->p_srates[i], 3); |
| } |
| as_in_type_i_desc.bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(idx); |
| as_in_type_i_desc.bSamFreqType = idx; |
| uac1->p_srate = audio_opts->p_srates[0]; |
| uac1->c_srate = audio_opts->c_srates[0]; |
| |
| /* allocate instance-specific interface IDs, and patch descriptors */ |
| status = usb_interface_id(c, f); |
| if (status < 0) |
| goto err_free_fu; |
| ac_interface_desc.bInterfaceNumber = status; |
| uac1->ac_intf = status; |
| uac1->ac_alt = 0; |
| |
| ba_iface_id = 0; |
| |
| if (EPOUT_EN(audio_opts)) { |
| status = usb_interface_id(c, f); |
| if (status < 0) |
| goto err_free_fu; |
| as_out_interface_alt_0_desc.bInterfaceNumber = status; |
| as_out_interface_alt_1_desc.bInterfaceNumber = status; |
| ac_header_desc->baInterfaceNr[ba_iface_id++] = status; |
| uac1->as_out_intf = status; |
| uac1->as_out_alt = 0; |
| } |
| |
| if (EPIN_EN(audio_opts)) { |
| status = usb_interface_id(c, f); |
| if (status < 0) |
| goto err_free_fu; |
| as_in_interface_alt_0_desc.bInterfaceNumber = status; |
| as_in_interface_alt_1_desc.bInterfaceNumber = status; |
| ac_header_desc->baInterfaceNr[ba_iface_id++] = status; |
| uac1->as_in_intf = status; |
| uac1->as_in_alt = 0; |
| } |
| |
| audio->gadget = gadget; |
| |
| status = -ENODEV; |
| |
| ac_interface_desc.bNumEndpoints = 0; |
| |
| /* allocate AC interrupt endpoint */ |
| if (FUOUT_EN(audio_opts) || FUIN_EN(audio_opts)) { |
| ep = usb_ep_autoconfig(cdev->gadget, &ac_int_ep_desc); |
| if (!ep) |
| goto err_free_fu; |
| uac1->int_ep = ep; |
| uac1->int_ep->desc = &ac_int_ep_desc; |
| |
| ac_interface_desc.bNumEndpoints = 1; |
| } |
| |
| /* allocate instance-specific endpoints */ |
| if (EPOUT_EN(audio_opts)) { |
| ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc); |
| if (!ep) |
| goto err_free_fu; |
| ss_as_out_ep_desc.bEndpointAddress = as_out_ep_desc.bEndpointAddress; |
| audio->out_ep = ep; |
| audio->out_ep->desc = &as_out_ep_desc; |
| } |
| |
| if (EPIN_EN(audio_opts)) { |
| ep = usb_ep_autoconfig(cdev->gadget, &as_in_ep_desc); |
| if (!ep) |
| goto err_free_fu; |
| ss_as_in_ep_desc.bEndpointAddress = as_in_ep_desc.bEndpointAddress; |
| audio->in_ep = ep; |
| audio->in_ep->desc = &as_in_ep_desc; |
| } |
| |
| setup_descriptor(audio_opts); |
| |
| /* copy descriptors, and track endpoint copies */ |
| status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, f_audio_ss_desc, |
| f_audio_ss_desc); |
| if (status) |
| goto err_free_fu; |
| |
| audio->out_ep_maxpsize = le16_to_cpu(as_out_ep_desc.wMaxPacketSize); |
| audio->in_ep_maxpsize = le16_to_cpu(as_in_ep_desc.wMaxPacketSize); |
| audio->params.c_chmask = audio_opts->c_chmask; |
| memcpy(audio->params.c_srates, audio_opts->c_srates, |
| sizeof(audio->params.c_srates)); |
| audio->params.c_ssize = audio_opts->c_ssize; |
| if (FUIN_EN(audio_opts)) { |
| audio->params.p_fu.id = USB_IN_FU_ID; |
| audio->params.p_fu.mute_present = audio_opts->p_mute_present; |
| audio->params.p_fu.volume_present = |
| audio_opts->p_volume_present; |
| audio->params.p_fu.volume_min = audio_opts->p_volume_min; |
| audio->params.p_fu.volume_max = audio_opts->p_volume_max; |
| audio->params.p_fu.volume_res = audio_opts->p_volume_res; |
| } |
| audio->params.p_chmask = audio_opts->p_chmask; |
| memcpy(audio->params.p_srates, audio_opts->p_srates, |
| sizeof(audio->params.p_srates)); |
| audio->params.p_ssize = audio_opts->p_ssize; |
| if (FUOUT_EN(audio_opts)) { |
| audio->params.c_fu.id = USB_OUT_FU_ID; |
| audio->params.c_fu.mute_present = audio_opts->c_mute_present; |
| audio->params.c_fu.volume_present = |
| audio_opts->c_volume_present; |
| audio->params.c_fu.volume_min = audio_opts->c_volume_min; |
| audio->params.c_fu.volume_max = audio_opts->c_volume_max; |
| audio->params.c_fu.volume_res = audio_opts->c_volume_res; |
| } |
| audio->params.req_number = audio_opts->req_number; |
| audio->params.fb_max = FBACK_FAST_MAX; |
| if (FUOUT_EN(audio_opts) || FUIN_EN(audio_opts)) |
| audio->notify = audio_notify; |
| |
| status = g_audio_setup(audio, "UAC1_PCM", "UAC1_Gadget"); |
| if (status) |
| goto err_card_register; |
| |
| return 0; |
| |
| err_card_register: |
| usb_free_all_descriptors(f); |
| err_free_fu: |
| kfree(out_feature_unit_desc); |
| out_feature_unit_desc = NULL; |
| kfree(in_feature_unit_desc); |
| in_feature_unit_desc = NULL; |
| fail: |
| kfree(ac_header_desc); |
| ac_header_desc = NULL; |
| return status; |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| 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_kstrtou32 kstrtou32 |
| #define uac1_kstrtos16 kstrtos16 |
| #define uac1_kstrtobool(s, base, res) kstrtobool((s), (res)) |
| |
| static const char *u32_fmt = "%u\n"; |
| static const char *s16_fmt = "%hd\n"; |
| static const char *bool_fmt = "%u\n"; |
| |
| #define UAC1_ATTRIBUTE(type, 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, type##_fmt, 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; \ |
| type num; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| if (opts->refcnt) { \ |
| ret = -EBUSY; \ |
| goto end; \ |
| } \ |
| \ |
| ret = uac1_kstrto##type(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) |
| |
| #define UAC1_RATE_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 = 0; \ |
| int i; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| page[0] = '\0'; \ |
| for (i = 0; i < UAC_MAX_RATES; i++) { \ |
| if (opts->name##s[i] == 0) \ |
| break; \ |
| result += sprintf(page + strlen(page), "%u,", \ |
| opts->name##s[i]); \ |
| } \ |
| if (strlen(page) > 0) \ |
| page[strlen(page) - 1] = '\n'; \ |
| 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); \ |
| char *split_page = NULL; \ |
| int ret = -EINVAL; \ |
| char *token; \ |
| u32 num; \ |
| int i; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| if (opts->refcnt) { \ |
| ret = -EBUSY; \ |
| goto end; \ |
| } \ |
| \ |
| i = 0; \ |
| memset(opts->name##s, 0x00, sizeof(opts->name##s)); \ |
| split_page = kstrdup(page, GFP_KERNEL); \ |
| while ((token = strsep(&split_page, ",")) != NULL) { \ |
| ret = kstrtou32(token, 0, &num); \ |
| if (ret) \ |
| goto end; \ |
| \ |
| opts->name##s[i++] = num; \ |
| ret = len; \ |
| }; \ |
| \ |
| end: \ |
| kfree(split_page); \ |
| mutex_unlock(&opts->lock); \ |
| return ret; \ |
| } \ |
| \ |
| CONFIGFS_ATTR(f_uac1_opts_, name) |
| |
| #define UAC1_ATTRIBUTE_STRING(name) \ |
| static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \ |
| char *page) \ |
| { \ |
| struct f_uac1_opts *opts = to_f_uac1_opts(item); \ |
| int result; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| result = scnprintf(page, sizeof(opts->name), "%s", opts->name); \ |
| mutex_unlock(&opts->lock); \ |
| \ |
| return result; \ |
| } \ |
| \ |
| static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ |
| const char *page, size_t len) \ |
| { \ |
| struct f_uac1_opts *opts = to_f_uac1_opts(item); \ |
| int ret = 0; \ |
| \ |
| mutex_lock(&opts->lock); \ |
| if (opts->refcnt) { \ |
| ret = -EBUSY; \ |
| goto end; \ |
| } \ |
| \ |
| ret = scnprintf(opts->name, min(sizeof(opts->name), len), \ |
| "%s", page); \ |
| \ |
| end: \ |
| mutex_unlock(&opts->lock); \ |
| return ret; \ |
| } \ |
| \ |
| CONFIGFS_ATTR(f_uac1_opts_, name) |
| |
| UAC1_ATTRIBUTE(u32, c_chmask); |
| UAC1_RATE_ATTRIBUTE(c_srate); |
| UAC1_ATTRIBUTE(u32, c_ssize); |
| UAC1_ATTRIBUTE(u32, p_chmask); |
| UAC1_RATE_ATTRIBUTE(p_srate); |
| UAC1_ATTRIBUTE(u32, p_ssize); |
| UAC1_ATTRIBUTE(u32, req_number); |
| |
| UAC1_ATTRIBUTE(bool, p_mute_present); |
| UAC1_ATTRIBUTE(bool, p_volume_present); |
| UAC1_ATTRIBUTE(s16, p_volume_min); |
| UAC1_ATTRIBUTE(s16, p_volume_max); |
| UAC1_ATTRIBUTE(s16, p_volume_res); |
| |
| UAC1_ATTRIBUTE(bool, c_mute_present); |
| UAC1_ATTRIBUTE(bool, c_volume_present); |
| UAC1_ATTRIBUTE(s16, c_volume_min); |
| UAC1_ATTRIBUTE(s16, c_volume_max); |
| UAC1_ATTRIBUTE(s16, c_volume_res); |
| |
| UAC1_ATTRIBUTE_STRING(function_name); |
| |
| UAC1_ATTRIBUTE_STRING(p_it_name); |
| UAC1_ATTRIBUTE_STRING(p_it_ch_name); |
| UAC1_ATTRIBUTE_STRING(p_ot_name); |
| UAC1_ATTRIBUTE_STRING(p_fu_vol_name); |
| |
| UAC1_ATTRIBUTE_STRING(c_it_name); |
| UAC1_ATTRIBUTE_STRING(c_it_ch_name); |
| UAC1_ATTRIBUTE_STRING(c_ot_name); |
| UAC1_ATTRIBUTE_STRING(c_fu_vol_name); |
| |
| static struct configfs_attribute *f_uac1_attrs[] = { |
| &f_uac1_opts_attr_c_chmask, |
| &f_uac1_opts_attr_c_srate, |
| &f_uac1_opts_attr_c_ssize, |
| &f_uac1_opts_attr_p_chmask, |
| &f_uac1_opts_attr_p_srate, |
| &f_uac1_opts_attr_p_ssize, |
| &f_uac1_opts_attr_req_number, |
| |
| &f_uac1_opts_attr_p_mute_present, |
| &f_uac1_opts_attr_p_volume_present, |
| &f_uac1_opts_attr_p_volume_min, |
| &f_uac1_opts_attr_p_volume_max, |
| &f_uac1_opts_attr_p_volume_res, |
| |
| &f_uac1_opts_attr_c_mute_present, |
| &f_uac1_opts_attr_c_volume_present, |
| &f_uac1_opts_attr_c_volume_min, |
| &f_uac1_opts_attr_c_volume_max, |
| &f_uac1_opts_attr_c_volume_res, |
| |
| &f_uac1_opts_attr_function_name, |
| |
| &f_uac1_opts_attr_p_it_name, |
| &f_uac1_opts_attr_p_it_ch_name, |
| &f_uac1_opts_attr_p_ot_name, |
| &f_uac1_opts_attr_p_fu_vol_name, |
| |
| &f_uac1_opts_attr_c_it_name, |
| &f_uac1_opts_attr_c_it_ch_name, |
| &f_uac1_opts_attr_c_ot_name, |
| &f_uac1_opts_attr_c_fu_vol_name, |
| |
| 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_opts *opts; |
| |
| opts = container_of(f, struct f_uac1_opts, func_inst); |
| 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->c_chmask = UAC1_DEF_CCHMASK; |
| opts->c_srates[0] = UAC1_DEF_CSRATE; |
| opts->c_ssize = UAC1_DEF_CSSIZE; |
| opts->p_chmask = UAC1_DEF_PCHMASK; |
| opts->p_srates[0] = UAC1_DEF_PSRATE; |
| opts->p_ssize = UAC1_DEF_PSSIZE; |
| |
| opts->p_mute_present = UAC1_DEF_MUTE_PRESENT; |
| opts->p_volume_present = UAC1_DEF_VOLUME_PRESENT; |
| opts->p_volume_min = UAC1_DEF_MIN_DB; |
| opts->p_volume_max = UAC1_DEF_MAX_DB; |
| opts->p_volume_res = UAC1_DEF_RES_DB; |
| |
| opts->c_mute_present = UAC1_DEF_MUTE_PRESENT; |
| opts->c_volume_present = UAC1_DEF_VOLUME_PRESENT; |
| opts->c_volume_min = UAC1_DEF_MIN_DB; |
| opts->c_volume_max = UAC1_DEF_MAX_DB; |
| opts->c_volume_res = UAC1_DEF_RES_DB; |
| |
| opts->req_number = UAC1_DEF_REQ_NUM; |
| |
| scnprintf(opts->function_name, sizeof(opts->function_name), "AC Interface"); |
| |
| scnprintf(opts->p_it_name, sizeof(opts->p_it_name), "Capture Input terminal"); |
| scnprintf(opts->p_it_ch_name, sizeof(opts->p_it_ch_name), "Capture Channels"); |
| scnprintf(opts->p_ot_name, sizeof(opts->p_ot_name), "Capture Output terminal"); |
| scnprintf(opts->p_fu_vol_name, sizeof(opts->p_fu_vol_name), "Capture Volume"); |
| |
| scnprintf(opts->c_it_name, sizeof(opts->c_it_name), "Playback Input terminal"); |
| scnprintf(opts->c_it_ch_name, sizeof(opts->c_it_ch_name), "Playback Channels"); |
| scnprintf(opts->c_ot_name, sizeof(opts->c_ot_name), "Playback Output terminal"); |
| scnprintf(opts->c_fu_vol_name, sizeof(opts->c_fu_vol_name), "Playback Volume"); |
| |
| return &opts->func_inst; |
| } |
| |
| static void f_audio_free(struct usb_function *f) |
| { |
| struct g_audio *audio; |
| struct f_uac1_opts *opts; |
| |
| audio = func_to_g_audio(f); |
| 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) |
| { |
| struct g_audio *audio = func_to_g_audio(f); |
| |
| g_audio_cleanup(audio); |
| usb_free_all_descriptors(f); |
| |
| kfree(out_feature_unit_desc); |
| out_feature_unit_desc = NULL; |
| kfree(in_feature_unit_desc); |
| in_feature_unit_desc = NULL; |
| |
| kfree(ac_header_desc); |
| ac_header_desc = NULL; |
| |
| audio->gadget = NULL; |
| } |
| |
| static struct usb_function *f_audio_alloc(struct usb_function_instance *fi) |
| { |
| struct f_uac1 *uac1; |
| struct f_uac1_opts *opts; |
| |
| /* allocate and initialize one new instance */ |
| uac1 = kzalloc(sizeof(*uac1), GFP_KERNEL); |
| if (!uac1) |
| return ERR_PTR(-ENOMEM); |
| |
| opts = container_of(fi, struct f_uac1_opts, func_inst); |
| mutex_lock(&opts->lock); |
| ++opts->refcnt; |
| mutex_unlock(&opts->lock); |
| |
| uac1->g_audio.func.name = "uac1_func"; |
| uac1->g_audio.func.bind = f_audio_bind; |
| uac1->g_audio.func.unbind = f_audio_unbind; |
| uac1->g_audio.func.set_alt = f_audio_set_alt; |
| uac1->g_audio.func.get_alt = f_audio_get_alt; |
| uac1->g_audio.func.setup = f_audio_setup; |
| uac1->g_audio.func.disable = f_audio_disable; |
| uac1->g_audio.func.suspend = f_audio_suspend; |
| uac1->g_audio.func.free_func = f_audio_free; |
| |
| return &uac1->g_audio.func; |
| } |
| |
| DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc); |
| MODULE_DESCRIPTION("USB Audio Class 1.0 Function (using u_audio API)"); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Ruslan Bilovol"); |
