| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ruslan Bilovol | 5226 | 50.68% | 10 | 17.54% |
| Jassi Brar | 1463 | 14.19% | 2 | 3.51% |
| Pawel Laszczak | 885 | 8.58% | 1 | 1.75% |
| Andreas Pape | 613 | 5.95% | 1 | 1.75% |
| Pavel Hofman | 535 | 5.19% | 8 | 14.04% |
| Andrzej Pietrasiewicz | 533 | 5.17% | 4 | 7.02% |
| Julian Scheel | 494 | 4.79% | 2 | 3.51% |
| Jerome Brunet | 104 | 1.01% | 1 | 1.75% |
| Jack Pham | 91 | 0.88% | 2 | 3.51% |
| Jing Leng | 65 | 0.63% | 1 | 1.75% |
| Joe Perches | 64 | 0.62% | 1 | 1.75% |
| Daniel Mack | 63 | 0.61% | 5 | 8.77% |
| Peter Chen | 51 | 0.49% | 2 | 3.51% |
| Yunhao Tian | 44 | 0.43% | 1 | 1.75% |
| Sebastian Andrzej Siewior | 26 | 0.25% | 3 | 5.26% |
| Sebastian Reimers | 9 | 0.09% | 1 | 1.75% |
| Eugeniu Rosca | 9 | 0.09% | 2 | 3.51% |
| Lad Prabhakar | 9 | 0.09% | 1 | 1.75% |
| Sekhar Nori | 6 | 0.06% | 1 | 1.75% |
| Christoph Hellwig | 6 | 0.06% | 1 | 1.75% |
| John Keeping | 6 | 0.06% | 1 | 1.75% |
| Colin Ian King | 4 | 0.04% | 2 | 3.51% |
| Felipe Balbi | 2 | 0.02% | 1 | 1.75% |
| Bhumika Goyal | 1 | 0.01% | 1 | 1.75% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 1.75% |
| John Youn | 1 | 0.01% | 1 | 1.75% |
| Total | 10311 | 57 |
// SPDX-License-Identifier: GPL-2.0+ /* * f_uac2.c -- USB Audio Class 2.0 Function * * Copyright (C) 2011 * Yadwinder Singh (yadi.brar01@gmail.com) * Jaswinder Singh (jaswinder.singh@linaro.org) * * Copyright (C) 2020 * Ruslan Bilovol (ruslan.bilovol@gmail.com) */ #include <linux/usb/audio.h> #include <linux/usb/audio-v2.h> #include <linux/module.h> #include "u_audio.h" #include "u_uac2.h" /* UAC2 spec: 4.1 Audio Channel Cluster Descriptor */ #define UAC2_CHANNEL_MASK 0x07FFFFFF /* * The driver implements a simple UAC_2 topology. * USB-OUT -> IT_1 -> FU -> OT_3 -> ALSA_Capture * ALSA_Playback -> IT_2 -> FU -> OT_4 -> USB-IN * Capture and Playback sampling rates are independently * controlled by two clock sources : * CLK_5 := c_srate, and CLK_6 := p_srate */ #define USB_OUT_CLK_ID (out_clk_src_desc.bClockID) #define USB_IN_CLK_ID (in_clk_src_desc.bClockID) #define USB_OUT_FU_ID (out_feature_unit_desc->bUnitID) #define USB_IN_FU_ID (in_feature_unit_desc->bUnitID) #define CONTROL_ABSENT 0 #define CONTROL_RDONLY 1 #define CONTROL_RDWR 3 #define CLK_FREQ_CTRL 0 #define CLK_VLD_CTRL 2 #define FU_MUTE_CTRL 0 #define FU_VOL_CTRL 2 #define COPY_CTRL 0 #define CONN_CTRL 2 #define OVRLD_CTRL 4 #define CLSTR_CTRL 6 #define UNFLW_CTRL 8 #define OVFLW_CTRL 10 #define EPIN_EN(_opts) ((_opts)->p_chmask != 0) #define EPOUT_EN(_opts) ((_opts)->c_chmask != 0) #define FUIN_EN(_opts) (EPIN_EN(_opts) \ && ((_opts)->p_mute_present \ || (_opts)->p_volume_present)) #define FUOUT_EN(_opts) (EPOUT_EN(_opts) \ && ((_opts)->c_mute_present \ || (_opts)->c_volume_present)) #define EPOUT_FBACK_IN_EN(_opts) ((_opts)->c_sync == USB_ENDPOINT_SYNC_ASYNC) struct f_uac2 { struct g_audio g_audio; u8 ac_intf, as_in_intf, as_out_intf; u8 ac_alt, as_in_alt, as_out_alt; /* needed for get_alt() */ 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; /* transient state, only valid during handling of a single control request */ int clock_id; }; static inline struct f_uac2 *func_to_uac2(struct usb_function *f) { return container_of(f, struct f_uac2, g_audio.func); } static inline struct f_uac2_opts *g_audio_to_uac2_opts(struct g_audio *agdev) { return container_of(agdev->func.fi, struct f_uac2_opts, func_inst); } static int afunc_notify(struct g_audio *agdev, int unit_id, int cs); /* --------- USB Function Interface ------------- */ enum { STR_ASSOC, STR_IF_CTRL, STR_CLKSRC_IN, STR_CLKSRC_OUT, STR_USB_IT, STR_IO_IT, STR_USB_OT, STR_IO_OT, STR_FU_IN, STR_FU_OUT, STR_AS_OUT_ALT0, STR_AS_OUT_ALT1, STR_AS_IN_ALT0, STR_AS_IN_ALT1, }; static struct usb_string strings_fn[] = { /* [STR_ASSOC].s = DYNAMIC, */ [STR_IF_CTRL].s = "Topology Control", [STR_CLKSRC_IN].s = "Input Clock", [STR_CLKSRC_OUT].s = "Output Clock", [STR_USB_IT].s = "USBH Out", [STR_IO_IT].s = "USBD Out", [STR_USB_OT].s = "USBH In", [STR_IO_OT].s = "USBD In", [STR_FU_IN].s = "Capture Volume", [STR_FU_OUT].s = "Playback Volume", [STR_AS_OUT_ALT0].s = "Playback Inactive", [STR_AS_OUT_ALT1].s = "Playback Active", [STR_AS_IN_ALT0].s = "Capture Inactive", [STR_AS_IN_ALT1].s = "Capture Active", { }, }; static const char *const speed_names[] = { [USB_SPEED_UNKNOWN] = "UNKNOWN", [USB_SPEED_LOW] = "LS", [USB_SPEED_FULL] = "FS", [USB_SPEED_HIGH] = "HS", [USB_SPEED_WIRELESS] = "W", [USB_SPEED_SUPER] = "SS", [USB_SPEED_SUPER_PLUS] = "SS+", }; static struct usb_gadget_strings str_fn = { .language = 0x0409, /* en-us */ .strings = strings_fn, }; static struct usb_gadget_strings *fn_strings[] = { &str_fn, NULL, }; static struct usb_interface_assoc_descriptor iad_desc = { .bLength = sizeof iad_desc, .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, .bFirstInterface = 0, .bInterfaceCount = 3, .bFunctionClass = USB_CLASS_AUDIO, .bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED, .bFunctionProtocol = UAC_VERSION_2, }; /* Audio Control Interface */ static struct usb_interface_descriptor std_ac_if_desc = { .bLength = sizeof std_ac_if_desc, .bDescriptorType = USB_DT_INTERFACE, .bAlternateSetting = 0, /* .bNumEndpoints = DYNAMIC */ .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, .bInterfaceProtocol = UAC_VERSION_2, }; /* Clock source for IN traffic */ static struct uac_clock_source_descriptor in_clk_src_desc = { .bLength = sizeof in_clk_src_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC2_CLOCK_SOURCE, /* .bClockID = DYNAMIC */ .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, .bmControls = (CONTROL_RDWR << CLK_FREQ_CTRL), .bAssocTerminal = 0, }; /* Clock source for OUT traffic */ static struct uac_clock_source_descriptor out_clk_src_desc = { .bLength = sizeof out_clk_src_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC2_CLOCK_SOURCE, /* .bClockID = DYNAMIC */ .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, .bmControls = (CONTROL_RDWR << CLK_FREQ_CTRL), .bAssocTerminal = 0, }; /* Input Terminal for USB_OUT */ static struct uac2_input_terminal_descriptor usb_out_it_desc = { .bLength = sizeof usb_out_it_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_INPUT_TERMINAL, /* .bTerminalID = DYNAMIC */ .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), .bAssocTerminal = 0, /* .bCSourceID = DYNAMIC */ .iChannelNames = 0, .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), }; /* Input Terminal for I/O-In */ static struct uac2_input_terminal_descriptor io_in_it_desc = { .bLength = sizeof io_in_it_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_INPUT_TERMINAL, /* .bTerminalID = DYNAMIC */ .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE), .bAssocTerminal = 0, /* .bCSourceID = DYNAMIC */ .iChannelNames = 0, .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), }; /* Ouput Terminal for USB_IN */ static struct uac2_output_terminal_descriptor usb_in_ot_desc = { .bLength = sizeof usb_in_ot_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, /* .bTerminalID = DYNAMIC */ .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), .bAssocTerminal = 0, /* .bSourceID = DYNAMIC */ /* .bCSourceID = DYNAMIC */ .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), }; /* Ouput Terminal for I/O-Out */ static struct uac2_output_terminal_descriptor io_out_ot_desc = { .bLength = sizeof io_out_ot_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, /* .bTerminalID = DYNAMIC */ .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER), .bAssocTerminal = 0, /* .bSourceID = DYNAMIC */ /* .bCSourceID = DYNAMIC */ .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), }; static struct uac2_feature_unit_descriptor *in_feature_unit_desc; static struct uac2_feature_unit_descriptor *out_feature_unit_desc; static struct uac2_ac_header_descriptor ac_hdr_desc = { .bLength = sizeof ac_hdr_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_MS_HEADER, .bcdADC = cpu_to_le16(0x200), .bCategory = UAC2_FUNCTION_IO_BOX, /* .wTotalLength = DYNAMIC */ .bmControls = 0, }; /* AC IN Interrupt Endpoint */ static struct usb_endpoint_descriptor fs_ep_int_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(6), .bInterval = 1, }; static struct usb_endpoint_descriptor hs_ep_int_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(6), .bInterval = 4, }; static struct usb_endpoint_descriptor ss_ep_int_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = cpu_to_le16(6), .bInterval = 4, }; static struct usb_ss_ep_comp_descriptor ss_ep_int_desc_comp = { .bLength = sizeof(ss_ep_int_desc_comp), .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, .wBytesPerInterval = cpu_to_le16(6), }; /* Audio Streaming OUT Interface - Alt0 */ static struct usb_interface_descriptor std_as_out_if0_desc = { .bLength = sizeof std_as_out_if0_desc, .bDescriptorType = USB_DT_INTERFACE, .bAlternateSetting = 0, .bNumEndpoints = 0, .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, .bInterfaceProtocol = UAC_VERSION_2, }; /* Audio Streaming OUT Interface - Alt1 */ static struct usb_interface_descriptor std_as_out_if1_desc = { .bLength = sizeof std_as_out_if1_desc, .bDescriptorType = USB_DT_INTERFACE, .bAlternateSetting = 1, .bNumEndpoints = 1, .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, .bInterfaceProtocol = UAC_VERSION_2, }; /* Audio Stream OUT Intface Desc */ static struct uac2_as_header_descriptor as_out_hdr_desc = { .bLength = sizeof as_out_hdr_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_AS_GENERAL, /* .bTerminalLink = DYNAMIC */ .bmControls = 0, .bFormatType = UAC_FORMAT_TYPE_I, .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), .iChannelNames = 0, }; /* Audio USB_OUT Format */ static struct uac2_format_type_i_descriptor as_out_fmt1_desc = { .bLength = sizeof as_out_fmt1_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_FORMAT_TYPE, .bFormatType = UAC_FORMAT_TYPE_I, }; /* STD AS ISO OUT Endpoint */ static struct usb_endpoint_descriptor fs_epout_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_OUT, /* .bmAttributes = DYNAMIC */ /* .wMaxPacketSize = DYNAMIC */ .bInterval = 1, }; static struct usb_endpoint_descriptor hs_epout_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, /* .bmAttributes = DYNAMIC */ /* .wMaxPacketSize = DYNAMIC */ /* .bInterval = DYNAMIC */ }; static struct usb_endpoint_descriptor ss_epout_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_OUT, /* .bmAttributes = DYNAMIC */ /* .wMaxPacketSize = DYNAMIC */ /* .bInterval = DYNAMIC */ }; static struct usb_ss_ep_comp_descriptor ss_epout_desc_comp = { .bLength = sizeof(ss_epout_desc_comp), .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, .bMaxBurst = 0, .bmAttributes = 0, /* wBytesPerInterval = DYNAMIC */ }; /* CS AS ISO OUT Endpoint */ static struct uac2_iso_endpoint_descriptor as_iso_out_desc = { .bLength = sizeof as_iso_out_desc, .bDescriptorType = USB_DT_CS_ENDPOINT, .bDescriptorSubtype = UAC_EP_GENERAL, .bmAttributes = 0, .bmControls = 0, .bLockDelayUnits = 0, .wLockDelay = 0, }; /* STD AS ISO IN Feedback Endpoint */ static struct usb_endpoint_descriptor fs_epin_fback_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, .wMaxPacketSize = cpu_to_le16(3), .bInterval = 1, }; static struct usb_endpoint_descriptor hs_epin_fback_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, .wMaxPacketSize = cpu_to_le16(4), .bInterval = 4, }; static struct usb_endpoint_descriptor ss_epin_fback_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, .wMaxPacketSize = cpu_to_le16(4), .bInterval = 4, }; static struct usb_ss_ep_comp_descriptor ss_epin_fback_desc_comp = { .bLength = sizeof(ss_epin_fback_desc_comp), .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, .bMaxBurst = 0, .bmAttributes = 0, .wBytesPerInterval = cpu_to_le16(4), }; /* Audio Streaming IN Interface - Alt0 */ static struct usb_interface_descriptor std_as_in_if0_desc = { .bLength = sizeof std_as_in_if0_desc, .bDescriptorType = USB_DT_INTERFACE, .bAlternateSetting = 0, .bNumEndpoints = 0, .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, .bInterfaceProtocol = UAC_VERSION_2, }; /* Audio Streaming IN Interface - Alt1 */ static struct usb_interface_descriptor std_as_in_if1_desc = { .bLength = sizeof std_as_in_if1_desc, .bDescriptorType = USB_DT_INTERFACE, .bAlternateSetting = 1, .bNumEndpoints = 1, .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, .bInterfaceProtocol = UAC_VERSION_2, }; /* Audio Stream IN Intface Desc */ static struct uac2_as_header_descriptor as_in_hdr_desc = { .bLength = sizeof as_in_hdr_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_AS_GENERAL, /* .bTerminalLink = DYNAMIC */ .bmControls = 0, .bFormatType = UAC_FORMAT_TYPE_I, .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), .iChannelNames = 0, }; /* Audio USB_IN Format */ static struct uac2_format_type_i_descriptor as_in_fmt1_desc = { .bLength = sizeof as_in_fmt1_desc, .bDescriptorType = USB_DT_CS_INTERFACE, .bDescriptorSubtype = UAC_FORMAT_TYPE, .bFormatType = UAC_FORMAT_TYPE_I, }; /* STD AS ISO IN Endpoint */ static struct usb_endpoint_descriptor fs_epin_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, /* .wMaxPacketSize = DYNAMIC */ .bInterval = 1, }; static struct usb_endpoint_descriptor hs_epin_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, /* .wMaxPacketSize = DYNAMIC */ /* .bInterval = DYNAMIC */ }; static struct usb_endpoint_descriptor ss_epin_desc = { .bLength = USB_DT_ENDPOINT_SIZE, .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, /* .wMaxPacketSize = DYNAMIC */ /* .bInterval = DYNAMIC */ }; static struct usb_ss_ep_comp_descriptor ss_epin_desc_comp = { .bLength = sizeof(ss_epin_desc_comp), .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, .bMaxBurst = 0, .bmAttributes = 0, /* wBytesPerInterval = DYNAMIC */ }; /* CS AS ISO IN Endpoint */ static struct uac2_iso_endpoint_descriptor as_iso_in_desc = { .bLength = sizeof as_iso_in_desc, .bDescriptorType = USB_DT_CS_ENDPOINT, .bDescriptorSubtype = UAC_EP_GENERAL, .bmAttributes = 0, .bmControls = 0, .bLockDelayUnits = 0, .wLockDelay = 0, }; static struct usb_descriptor_header *fs_audio_desc[] = { (struct usb_descriptor_header *)&iad_desc, (struct usb_descriptor_header *)&std_ac_if_desc, (struct usb_descriptor_header *)&ac_hdr_desc, (struct usb_descriptor_header *)&in_clk_src_desc, (struct usb_descriptor_header *)&out_clk_src_desc, (struct usb_descriptor_header *)&usb_out_it_desc, (struct usb_descriptor_header *)&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 *)&io_out_ot_desc, (struct usb_descriptor_header *)&fs_ep_int_desc, (struct usb_descriptor_header *)&std_as_out_if0_desc, (struct usb_descriptor_header *)&std_as_out_if1_desc, (struct usb_descriptor_header *)&as_out_hdr_desc, (struct usb_descriptor_header *)&as_out_fmt1_desc, (struct usb_descriptor_header *)&fs_epout_desc, (struct usb_descriptor_header *)&as_iso_out_desc, (struct usb_descriptor_header *)&fs_epin_fback_desc, (struct usb_descriptor_header *)&std_as_in_if0_desc, (struct usb_descriptor_header *)&std_as_in_if1_desc, (struct usb_descriptor_header *)&as_in_hdr_desc, (struct usb_descriptor_header *)&as_in_fmt1_desc, (struct usb_descriptor_header *)&fs_epin_desc, (struct usb_descriptor_header *)&as_iso_in_desc, NULL, }; static struct usb_descriptor_header *hs_audio_desc[] = { (struct usb_descriptor_header *)&iad_desc, (struct usb_descriptor_header *)&std_ac_if_desc, (struct usb_descriptor_header *)&ac_hdr_desc, (struct usb_descriptor_header *)&in_clk_src_desc, (struct usb_descriptor_header *)&out_clk_src_desc, (struct usb_descriptor_header *)&usb_out_it_desc, (struct usb_descriptor_header *)&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 *)&io_out_ot_desc, (struct usb_descriptor_header *)&hs_ep_int_desc, (struct usb_descriptor_header *)&std_as_out_if0_desc, (struct usb_descriptor_header *)&std_as_out_if1_desc, (struct usb_descriptor_header *)&as_out_hdr_desc, (struct usb_descriptor_header *)&as_out_fmt1_desc, (struct usb_descriptor_header *)&hs_epout_desc, (struct usb_descriptor_header *)&as_iso_out_desc, (struct usb_descriptor_header *)&hs_epin_fback_desc, (struct usb_descriptor_header *)&std_as_in_if0_desc, (struct usb_descriptor_header *)&std_as_in_if1_desc, (struct usb_descriptor_header *)&as_in_hdr_desc, (struct usb_descriptor_header *)&as_in_fmt1_desc, (struct usb_descriptor_header *)&hs_epin_desc, (struct usb_descriptor_header *)&as_iso_in_desc, NULL, }; static struct usb_descriptor_header *ss_audio_desc[] = { (struct usb_descriptor_header *)&iad_desc, (struct usb_descriptor_header *)&std_ac_if_desc, (struct usb_descriptor_header *)&ac_hdr_desc, (struct usb_descriptor_header *)&in_clk_src_desc, (struct usb_descriptor_header *)&out_clk_src_desc, (struct usb_descriptor_header *)&usb_out_it_desc, (struct usb_descriptor_header *)&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 *)&io_out_ot_desc, (struct usb_descriptor_header *)&ss_ep_int_desc, (struct usb_descriptor_header *)&ss_ep_int_desc_comp, (struct usb_descriptor_header *)&std_as_out_if0_desc, (struct usb_descriptor_header *)&std_as_out_if1_desc, (struct usb_descriptor_header *)&as_out_hdr_desc, (struct usb_descriptor_header *)&as_out_fmt1_desc, (struct usb_descriptor_header *)&ss_epout_desc, (struct usb_descriptor_header *)&ss_epout_desc_comp, (struct usb_descriptor_header *)&as_iso_out_desc, (struct usb_descriptor_header *)&ss_epin_fback_desc, (struct usb_descriptor_header *)&ss_epin_fback_desc_comp, (struct usb_descriptor_header *)&std_as_in_if0_desc, (struct usb_descriptor_header *)&std_as_in_if1_desc, (struct usb_descriptor_header *)&as_in_hdr_desc, (struct usb_descriptor_header *)&as_in_fmt1_desc, (struct usb_descriptor_header *)&ss_epin_desc, (struct usb_descriptor_header *)&ss_epin_desc_comp, (struct usb_descriptor_header *)&as_iso_in_desc, NULL, }; struct cntrl_cur_lay2 { __le16 wCUR; }; struct cntrl_range_lay2 { __le16 wNumSubRanges; __le16 wMIN; __le16 wMAX; __le16 wRES; } __packed; struct cntrl_cur_lay3 { __le32 dCUR; }; struct cntrl_subrange_lay3 { __le32 dMIN; __le32 dMAX; __le32 dRES; } __packed; #define ranges_lay3_size(c) (sizeof(c.wNumSubRanges) \ + le16_to_cpu(c.wNumSubRanges) \ * sizeof(struct cntrl_subrange_lay3)) #define DECLARE_UAC2_CNTRL_RANGES_LAY3(k, n) \ struct cntrl_ranges_lay3_##k { \ __le16 wNumSubRanges; \ struct cntrl_subrange_lay3 r[n]; \ } __packed DECLARE_UAC2_CNTRL_RANGES_LAY3(srates, UAC_MAX_RATES); static int get_max_srate(const int *srates) { int i, max_srate = 0; for (i = 0; i < UAC_MAX_RATES; i++) { if (srates[i] == 0) break; if (srates[i] > max_srate) max_srate = srates[i]; } return max_srate; } static int get_max_bw_for_bint(const struct f_uac2_opts *uac2_opts, u8 bint, unsigned int factor, bool is_playback) { int chmask, srate, ssize; u16 max_size_bw; if (is_playback) { chmask = uac2_opts->p_chmask; srate = get_max_srate(uac2_opts->p_srates); ssize = uac2_opts->p_ssize; } else { chmask = uac2_opts->c_chmask; srate = get_max_srate(uac2_opts->c_srates); ssize = uac2_opts->c_ssize; } if (is_playback || (uac2_opts->c_sync == USB_ENDPOINT_SYNC_ASYNC)) { // playback is always async, capture only when configured // Win10 requires max packet size + 1 frame srate = srate * (1000 + uac2_opts->fb_max) / 1000; // updated srate is always bigger, therefore DIV_ROUND_UP always yields +1 max_size_bw = num_channels(chmask) * ssize * (DIV_ROUND_UP(srate, factor / (1 << (bint - 1)))); } else { // adding 1 frame provision for Win10 max_size_bw = num_channels(chmask) * ssize * (DIV_ROUND_UP(srate, factor / (1 << (bint - 1))) + 1); } return max_size_bw; } static int set_ep_max_packet_size_bint(struct device *dev, const struct f_uac2_opts *uac2_opts, struct usb_endpoint_descriptor *ep_desc, enum usb_device_speed speed, bool is_playback) { u16 max_size_bw, max_size_ep; u8 bint, opts_bint; char *dir; switch (speed) { case USB_SPEED_FULL: max_size_ep = 1023; // fixed bint = ep_desc->bInterval; max_size_bw = get_max_bw_for_bint(uac2_opts, bint, 1000, is_playback); break; case USB_SPEED_HIGH: case USB_SPEED_SUPER: max_size_ep = 1024; if (is_playback) opts_bint = uac2_opts->p_hs_bint; else opts_bint = uac2_opts->c_hs_bint; if (opts_bint > 0) { /* fixed bint */ bint = opts_bint; max_size_bw = get_max_bw_for_bint(uac2_opts, bint, 8000, is_playback); } else { /* checking bInterval from 4 to 1 whether the required bandwidth fits */ for (bint = 4; bint > 0; --bint) { max_size_bw = get_max_bw_for_bint( uac2_opts, bint, 8000, is_playback); if (max_size_bw <= max_size_ep) break; } } break; default: return -EINVAL; } if (is_playback) dir = "Playback"; else dir = "Capture"; if (max_size_bw <= max_size_ep) dev_dbg(dev, "%s %s: Would use wMaxPacketSize %d and bInterval %d\n", speed_names[speed], dir, max_size_bw, bint); else { dev_warn(dev, "%s %s: Req. wMaxPacketSize %d at bInterval %d > max ISOC %d, may drop data!\n", speed_names[speed], dir, max_size_bw, bint, max_size_ep); max_size_bw = max_size_ep; } ep_desc->wMaxPacketSize = cpu_to_le16(max_size_bw); ep_desc->bInterval = bint; return 0; } static struct uac2_feature_unit_descriptor *build_fu_desc(int chmask) { struct uac2_feature_unit_descriptor *fu_desc; int channels = num_channels(chmask); int fu_desc_size = UAC2_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; /* bUnitID, bSourceID and bmaControls will be defined later */ return fu_desc; } /* Use macro to overcome line length limitation */ #define USBDHDR(p) (struct usb_descriptor_header *)(p) static void setup_headers(struct f_uac2_opts *opts, struct usb_descriptor_header **headers, enum usb_device_speed speed) { struct usb_ss_ep_comp_descriptor *epout_desc_comp = NULL; struct usb_ss_ep_comp_descriptor *epin_desc_comp = NULL; struct usb_ss_ep_comp_descriptor *epin_fback_desc_comp = NULL; struct usb_ss_ep_comp_descriptor *ep_int_desc_comp = NULL; struct usb_endpoint_descriptor *epout_desc; struct usb_endpoint_descriptor *epin_desc; struct usb_endpoint_descriptor *epin_fback_desc; struct usb_endpoint_descriptor *ep_int_desc; int i; switch (speed) { case USB_SPEED_FULL: epout_desc = &fs_epout_desc; epin_desc = &fs_epin_desc; epin_fback_desc = &fs_epin_fback_desc; ep_int_desc = &fs_ep_int_desc; break; case USB_SPEED_HIGH: epout_desc = &hs_epout_desc; epin_desc = &hs_epin_desc; epin_fback_desc = &hs_epin_fback_desc; ep_int_desc = &hs_ep_int_desc; break; default: epout_desc = &ss_epout_desc; epin_desc = &ss_epin_desc; epout_desc_comp = &ss_epout_desc_comp; epin_desc_comp = &ss_epin_desc_comp; epin_fback_desc = &ss_epin_fback_desc; epin_fback_desc_comp = &ss_epin_fback_desc_comp; ep_int_desc = &ss_ep_int_desc; ep_int_desc_comp = &ss_ep_int_desc_comp; } i = 0; headers[i++] = USBDHDR(&iad_desc); headers[i++] = USBDHDR(&std_ac_if_desc); headers[i++] = USBDHDR(&ac_hdr_desc); if (EPIN_EN(opts)) headers[i++] = USBDHDR(&in_clk_src_desc); if (EPOUT_EN(opts)) { headers[i++] = USBDHDR(&out_clk_src_desc); headers[i++] = USBDHDR(&usb_out_it_desc); if (FUOUT_EN(opts)) headers[i++] = USBDHDR(out_feature_unit_desc); } if (EPIN_EN(opts)) { headers[i++] = USBDHDR(&io_in_it_desc); if (FUIN_EN(opts)) headers[i++] = USBDHDR(in_feature_unit_desc); headers[i++] = USBDHDR(&usb_in_ot_desc); } if (EPOUT_EN(opts)) headers[i++] = USBDHDR(&io_out_ot_desc); if (FUOUT_EN(opts) || FUIN_EN(opts)) { headers[i++] = USBDHDR(ep_int_desc); if (ep_int_desc_comp) headers[i++] = USBDHDR(ep_int_desc_comp); } if (EPOUT_EN(opts)) { headers[i++] = USBDHDR(&std_as_out_if0_desc); headers[i++] = USBDHDR(&std_as_out_if1_desc); headers[i++] = USBDHDR(&as_out_hdr_desc); headers[i++] = USBDHDR(&as_out_fmt1_desc); headers[i++] = USBDHDR(epout_desc); if (epout_desc_comp) headers[i++] = USBDHDR(epout_desc_comp); headers[i++] = USBDHDR(&as_iso_out_desc); if (EPOUT_FBACK_IN_EN(opts)) { headers[i++] = USBDHDR(epin_fback_desc); if (epin_fback_desc_comp) headers[i++] = USBDHDR(epin_fback_desc_comp); } } if (EPIN_EN(opts)) { headers[i++] = USBDHDR(&std_as_in_if0_desc); headers[i++] = USBDHDR(&std_as_in_if1_desc); headers[i++] = USBDHDR(&as_in_hdr_desc); headers[i++] = USBDHDR(&as_in_fmt1_desc); headers[i++] = USBDHDR(epin_desc); if (epin_desc_comp) headers[i++] = USBDHDR(epin_desc_comp); headers[i++] = USBDHDR(&as_iso_in_desc); } headers[i] = NULL; } static void setup_descriptor(struct f_uac2_opts *opts) { /* patch descriptors */ int i = 1; /* ID's start with 1 */ if (EPOUT_EN(opts)) usb_out_it_desc.bTerminalID = i++; if (EPIN_EN(opts)) io_in_it_desc.bTerminalID = i++; if (EPOUT_EN(opts)) io_out_ot_desc.bTerminalID = i++; if (EPIN_EN(opts)) usb_in_ot_desc.bTerminalID = i++; if (FUOUT_EN(opts)) out_feature_unit_desc->bUnitID = i++; if (FUIN_EN(opts)) in_feature_unit_desc->bUnitID = i++; if (EPOUT_EN(opts)) out_clk_src_desc.bClockID = i++; if (EPIN_EN(opts)) in_clk_src_desc.bClockID = i++; usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID; 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; } usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID; io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID; io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID; 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_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID; as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID; iad_desc.bInterfaceCount = 1; ac_hdr_desc.wTotalLength = cpu_to_le16(sizeof(ac_hdr_desc)); if (EPIN_EN(opts)) { u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); len += sizeof(in_clk_src_desc); len += sizeof(usb_in_ot_desc); if (FUIN_EN(opts)) len += in_feature_unit_desc->bLength; len += sizeof(io_in_it_desc); ac_hdr_desc.wTotalLength = cpu_to_le16(len); iad_desc.bInterfaceCount++; } if (EPOUT_EN(opts)) { u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); len += sizeof(out_clk_src_desc); len += sizeof(usb_out_it_desc); if (FUOUT_EN(opts)) len += out_feature_unit_desc->bLength; len += sizeof(io_out_ot_desc); ac_hdr_desc.wTotalLength = cpu_to_le16(len); iad_desc.bInterfaceCount++; } setup_headers(opts, fs_audio_desc, USB_SPEED_FULL); setup_headers(opts, hs_audio_desc, USB_SPEED_HIGH); setup_headers(opts, ss_audio_desc, USB_SPEED_SUPER); } static int afunc_validate_opts(struct g_audio *agdev, struct device *dev) { struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); const char *msg = NULL; if (!opts->p_chmask && !opts->c_chmask) msg = "no playback and capture channels"; else if (opts->p_chmask & ~UAC2_CHANNEL_MASK) msg = "unsupported playback channels mask"; else if (opts->c_chmask & ~UAC2_CHANNEL_MASK) msg = "unsupported capture channels mask"; else if ((opts->p_ssize < 1) || (opts->p_ssize > 4)) msg = "incorrect playback sample size"; else if ((opts->c_ssize < 1) || (opts->c_ssize > 4)) msg = "incorrect capture sample size"; else if (!opts->p_srates[0]) msg = "incorrect playback sampling rate"; else if (!opts->c_srates[0]) msg = "incorrect capture sampling rate"; else if (opts->p_volume_max <= opts->p_volume_min) msg = "incorrect playback volume max/min"; else if (opts->c_volume_max <= opts->c_volume_min) msg = "incorrect capture volume max/min"; else if (opts->p_volume_res <= 0) msg = "negative/zero playback volume resolution"; else if (opts->c_volume_res <= 0) msg = "negative/zero capture volume resolution"; else if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) msg = "incorrect playback volume resolution"; else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) msg = "incorrect capture volume resolution"; else if ((opts->p_hs_bint < 0) || (opts->p_hs_bint > 4)) msg = "incorrect playback HS/SS bInterval (1-4: fixed, 0: auto)"; else if ((opts->c_hs_bint < 0) || (opts->c_hs_bint > 4)) msg = "incorrect capture HS/SS bInterval (1-4: fixed, 0: auto)"; if (msg) { dev_err(dev, "Error: %s\n", msg); return -EINVAL; } return 0; } static int afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) { struct f_uac2 *uac2 = func_to_uac2(fn); struct g_audio *agdev = func_to_g_audio(fn); struct usb_composite_dev *cdev = cfg->cdev; struct usb_gadget *gadget = cdev->gadget; struct device *dev = &gadget->dev; struct f_uac2_opts *uac2_opts = g_audio_to_uac2_opts(agdev); struct usb_string *us; int ret; ret = afunc_validate_opts(agdev, dev); if (ret) return ret; strings_fn[STR_ASSOC].s = uac2_opts->function_name; us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn)); if (IS_ERR(us)) return PTR_ERR(us); if (FUOUT_EN(uac2_opts)) { out_feature_unit_desc = build_fu_desc(uac2_opts->c_chmask); if (!out_feature_unit_desc) return -ENOMEM; } if (FUIN_EN(uac2_opts)) { in_feature_unit_desc = build_fu_desc(uac2_opts->p_chmask); if (!in_feature_unit_desc) { ret = -ENOMEM; goto err_free_fu; } } iad_desc.iFunction = us[STR_ASSOC].id; std_ac_if_desc.iInterface = us[STR_IF_CTRL].id; in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id; out_clk_src_desc.iClockSource = us[STR_CLKSRC_OUT].id; usb_out_it_desc.iTerminal = us[STR_USB_IT].id; io_in_it_desc.iTerminal = us[STR_IO_IT].id; usb_in_ot_desc.iTerminal = us[STR_USB_OT].id; io_out_ot_desc.iTerminal = us[STR_IO_OT].id; std_as_out_if0_desc.iInterface = us[STR_AS_OUT_ALT0].id; std_as_out_if1_desc.iInterface = us[STR_AS_OUT_ALT1].id; std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id; std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id; if (FUOUT_EN(uac2_opts)) { u8 *i_feature = (u8 *)out_feature_unit_desc + out_feature_unit_desc->bLength - 1; *i_feature = us[STR_FU_OUT].id; } if (FUIN_EN(uac2_opts)) { u8 *i_feature = (u8 *)in_feature_unit_desc + in_feature_unit_desc->bLength - 1; *i_feature = us[STR_FU_IN].id; } /* Initialize the configurable parameters */ usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask); usb_out_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); io_in_it_desc.bNrChannels = num_channels(uac2_opts->p_chmask); io_in_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); as_out_hdr_desc.bNrChannels = num_channels(uac2_opts->c_chmask); as_out_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); as_in_hdr_desc.bNrChannels = num_channels(uac2_opts->p_chmask); as_in_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); as_out_fmt1_desc.bSubslotSize = uac2_opts->c_ssize; as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8; as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize; as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8; if (FUOUT_EN(uac2_opts)) { __le32 *bma = (__le32 *)&out_feature_unit_desc->bmaControls[0]; u32 control = 0; if (uac2_opts->c_mute_present) control |= CONTROL_RDWR << FU_MUTE_CTRL; if (uac2_opts->c_volume_present) control |= CONTROL_RDWR << FU_VOL_CTRL; *bma = cpu_to_le32(control); } if (FUIN_EN(uac2_opts)) { __le32 *bma = (__le32 *)&in_feature_unit_desc->bmaControls[0]; u32 control = 0; if (uac2_opts->p_mute_present) control |= CONTROL_RDWR << FU_MUTE_CTRL; if (uac2_opts->p_volume_present) control |= CONTROL_RDWR << FU_VOL_CTRL; *bma = cpu_to_le32(control); } ret = usb_interface_id(cfg, fn); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); goto err_free_fu; } iad_desc.bFirstInterface = ret; std_ac_if_desc.bInterfaceNumber = ret; uac2->ac_intf = ret; uac2->ac_alt = 0; if (EPOUT_EN(uac2_opts)) { ret = usb_interface_id(cfg, fn); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); goto err_free_fu; } std_as_out_if0_desc.bInterfaceNumber = ret; std_as_out_if1_desc.bInterfaceNumber = ret; uac2->as_out_intf = ret; uac2->as_out_alt = 0; if (EPOUT_FBACK_IN_EN(uac2_opts)) { fs_epout_desc.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; hs_epout_desc.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; ss_epout_desc.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; std_as_out_if1_desc.bNumEndpoints++; } else { fs_epout_desc.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; hs_epout_desc.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; ss_epout_desc.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; } } if (EPIN_EN(uac2_opts)) { ret = usb_interface_id(cfg, fn); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); goto err_free_fu; } std_as_in_if0_desc.bInterfaceNumber = ret; std_as_in_if1_desc.bInterfaceNumber = ret; uac2->as_in_intf = ret; uac2->as_in_alt = 0; } if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) { uac2->int_ep = usb_ep_autoconfig(gadget, &fs_ep_int_desc); if (!uac2->int_ep) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); ret = -ENODEV; goto err_free_fu; } std_ac_if_desc.bNumEndpoints = 1; } hs_epin_desc.bInterval = uac2_opts->p_hs_bint; ss_epin_desc.bInterval = uac2_opts->p_hs_bint; hs_epout_desc.bInterval = uac2_opts->c_hs_bint; ss_epout_desc.bInterval = uac2_opts->c_hs_bint; /* Calculate wMaxPacketSize according to audio bandwidth */ ret = set_ep_max_packet_size_bint(dev, uac2_opts, &fs_epin_desc, USB_SPEED_FULL, true); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return ret; } ret = set_ep_max_packet_size_bint(dev, uac2_opts, &fs_epout_desc, USB_SPEED_FULL, false); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return ret; } ret = set_ep_max_packet_size_bint(dev, uac2_opts, &hs_epin_desc, USB_SPEED_HIGH, true); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return ret; } ret = set_ep_max_packet_size_bint(dev, uac2_opts, &hs_epout_desc, USB_SPEED_HIGH, false); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return ret; } ret = set_ep_max_packet_size_bint(dev, uac2_opts, &ss_epin_desc, USB_SPEED_SUPER, true); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return ret; } ret = set_ep_max_packet_size_bint(dev, uac2_opts, &ss_epout_desc, USB_SPEED_SUPER, false); if (ret < 0) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return ret; } if (EPOUT_EN(uac2_opts)) { agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc); if (!agdev->out_ep) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); ret = -ENODEV; goto err_free_fu; } if (EPOUT_FBACK_IN_EN(uac2_opts)) { agdev->in_ep_fback = usb_ep_autoconfig(gadget, &fs_epin_fback_desc); if (!agdev->in_ep_fback) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); ret = -ENODEV; goto err_free_fu; } } } if (EPIN_EN(uac2_opts)) { agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc); if (!agdev->in_ep) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); ret = -ENODEV; goto err_free_fu; } } agdev->in_ep_maxpsize = max_t(u16, le16_to_cpu(fs_epin_desc.wMaxPacketSize), le16_to_cpu(hs_epin_desc.wMaxPacketSize)); agdev->out_ep_maxpsize = max_t(u16, le16_to_cpu(fs_epout_desc.wMaxPacketSize), le16_to_cpu(hs_epout_desc.wMaxPacketSize)); agdev->in_ep_maxpsize = max_t(u16, agdev->in_ep_maxpsize, le16_to_cpu(ss_epin_desc.wMaxPacketSize)); agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize, le16_to_cpu(ss_epout_desc.wMaxPacketSize)); ss_epin_desc_comp.wBytesPerInterval = ss_epin_desc.wMaxPacketSize; ss_epout_desc_comp.wBytesPerInterval = ss_epout_desc.wMaxPacketSize; // HS and SS endpoint addresses are copied from autoconfigured FS descriptors hs_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; hs_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; ss_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; ss_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; setup_descriptor(uac2_opts); ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc, ss_audio_desc); if (ret) goto err_free_fu; agdev->gadget = gadget; agdev->params.p_chmask = uac2_opts->p_chmask; memcpy(agdev->params.p_srates, uac2_opts->p_srates, sizeof(agdev->params.p_srates)); agdev->params.p_ssize = uac2_opts->p_ssize; if (FUIN_EN(uac2_opts)) { agdev->params.p_fu.id = USB_IN_FU_ID; agdev->params.p_fu.mute_present = uac2_opts->p_mute_present; agdev->params.p_fu.volume_present = uac2_opts->p_volume_present; agdev->params.p_fu.volume_min = uac2_opts->p_volume_min; agdev->params.p_fu.volume_max = uac2_opts->p_volume_max; agdev->params.p_fu.volume_res = uac2_opts->p_volume_res; } agdev->params.c_chmask = uac2_opts->c_chmask; memcpy(agdev->params.c_srates, uac2_opts->c_srates, sizeof(agdev->params.c_srates)); agdev->params.c_ssize = uac2_opts->c_ssize; if (FUOUT_EN(uac2_opts)) { agdev->params.c_fu.id = USB_OUT_FU_ID; agdev->params.c_fu.mute_present = uac2_opts->c_mute_present; agdev->params.c_fu.volume_present = uac2_opts->c_volume_present; agdev->params.c_fu.volume_min = uac2_opts->c_volume_min; agdev->params.c_fu.volume_max = uac2_opts->c_volume_max; agdev->params.c_fu.volume_res = uac2_opts->c_volume_res; } agdev->params.req_number = uac2_opts->req_number; agdev->params.fb_max = uac2_opts->fb_max; if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) agdev->notify = afunc_notify; ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget"); if (ret) goto err_free_descs; return 0; err_free_descs: usb_free_all_descriptors(fn); agdev->gadget = NULL; err_free_fu: kfree(out_feature_unit_desc); out_feature_unit_desc = NULL; kfree(in_feature_unit_desc); in_feature_unit_desc = NULL; return ret; } static void afunc_notify_complete(struct usb_ep *_ep, struct usb_request *req) { struct g_audio *agdev = req->context; struct f_uac2 *uac2 = func_to_uac2(&agdev->func); atomic_dec(&uac2->int_count); kfree(req->buf); usb_ep_free_request(_ep, req); } static int afunc_notify(struct g_audio *agdev, int unit_id, int cs) { struct f_uac2 *uac2 = func_to_uac2(&agdev->func); struct usb_request *req; struct uac2_interrupt_data_msg *msg; u16 w_index, w_value; int ret; if (!uac2->int_ep->enabled) return 0; if (atomic_inc_return(&uac2->int_count) > UAC2_DEF_INT_REQ_NUM) { atomic_dec(&uac2->int_count); return 0; } req = usb_ep_alloc_request(uac2->int_ep, GFP_ATOMIC); if (req == NULL) { ret = -ENOMEM; goto err_dec_int_count; } msg = kzalloc(sizeof(*msg), GFP_ATOMIC); if (msg == NULL) { ret = -ENOMEM; goto err_free_request; } w_index = unit_id << 8 | uac2->ac_intf; w_value = cs << 8; msg->bInfo = 0; /* Non-vendor, interface interrupt */ msg->bAttribute = UAC2_CS_CUR; msg->wIndex = cpu_to_le16(w_index); msg->wValue = cpu_to_le16(w_value); req->length = sizeof(*msg); req->buf = msg; req->context = agdev; req->complete = afunc_notify_complete; ret = usb_ep_queue(uac2->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(uac2->int_ep, req); err_dec_int_count: atomic_dec(&uac2->int_count); return ret; } static int afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt) { struct usb_composite_dev *cdev = fn->config->cdev; struct f_uac2 *uac2 = func_to_uac2(fn); struct g_audio *agdev = func_to_g_audio(fn); struct usb_gadget *gadget = cdev->gadget; struct device *dev = &gadget->dev; int ret = 0; /* No i/f has more than 2 alt settings */ if (alt > 1) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return -EINVAL; } if (intf == uac2->ac_intf) { /* Control I/f has only 1 AltSetting - 0 */ if (alt) { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return -EINVAL; } /* restart interrupt endpoint */ if (uac2->int_ep) { usb_ep_disable(uac2->int_ep); config_ep_by_speed(gadget, &agdev->func, uac2->int_ep); usb_ep_enable(uac2->int_ep); } return 0; } if (intf == uac2->as_out_intf) { uac2->as_out_alt = alt; if (alt) ret = u_audio_start_capture(&uac2->g_audio); else u_audio_stop_capture(&uac2->g_audio); } else if (intf == uac2->as_in_intf) { uac2->as_in_alt = alt; if (alt) ret = u_audio_start_playback(&uac2->g_audio); else u_audio_stop_playback(&uac2->g_audio); } else { dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); return -EINVAL; } return ret; } static int afunc_get_alt(struct usb_function *fn, unsigned intf) { struct f_uac2 *uac2 = func_to_uac2(fn); struct g_audio *agdev = func_to_g_audio(fn); if (intf == uac2->ac_intf) return uac2->ac_alt; else if (intf == uac2->as_out_intf) return uac2->as_out_alt; else if (intf == uac2->as_in_intf) return uac2->as_in_alt; else dev_err(&agdev->gadget->dev, "%s:%d Invalid Interface %d!\n", __func__, __LINE__, intf); return -EINVAL; } static void afunc_disable(struct usb_function *fn) { struct f_uac2 *uac2 = func_to_uac2(fn); uac2->as_in_alt = 0; uac2->as_out_alt = 0; u_audio_stop_capture(&uac2->g_audio); u_audio_stop_playback(&uac2->g_audio); if (uac2->int_ep) usb_ep_disable(uac2->int_ep); } static void afunc_suspend(struct usb_function *fn) { struct f_uac2 *uac2 = func_to_uac2(fn); u_audio_suspend(&uac2->g_audio); } static int in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) { struct usb_request *req = fn->config->cdev->req; struct g_audio *agdev = func_to_g_audio(fn); struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 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; u32 p_srate, c_srate; u_audio_get_playback_srate(agdev, &p_srate); u_audio_get_capture_srate(agdev, &c_srate); if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { struct cntrl_cur_lay3 c; memset(&c, 0, sizeof(struct cntrl_cur_lay3)); if (entity_id == USB_IN_CLK_ID) c.dCUR = cpu_to_le32(p_srate); else if (entity_id == USB_OUT_CLK_ID) c.dCUR = cpu_to_le32(c_srate); value = min_t(unsigned int, w_length, sizeof(c)); memcpy(req->buf, &c, value); } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) { *(u8 *)req->buf = 1; value = min_t(unsigned int, w_length, 1); } else { dev_err(&agdev->gadget->dev, "%s:%d control_selector=%d TODO!\n", __func__, __LINE__, control_selector); } } else 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(agdev, is_playback, &mute); *(u8 *)req->buf = mute; value = min_t(unsigned int, w_length, 1); } else if (control_selector == UAC_FU_VOLUME) { struct cntrl_cur_lay2 c; s16 volume; memset(&c, 0, sizeof(struct cntrl_cur_lay2)); u_audio_get_volume(agdev, is_playback, &volume); c.wCUR = cpu_to_le16(volume); value = min_t(unsigned int, w_length, sizeof(c)); memcpy(req->buf, &c, value); } else { dev_err(&agdev->gadget->dev, "%s:%d control_selector=%d TODO!\n", __func__, __LINE__, control_selector); } } else { dev_err(&agdev->gadget->dev, "%s:%d entity_id=%d control_selector=%d TODO!\n", __func__, __LINE__, entity_id, control_selector); } return value; } static int in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr) { struct usb_request *req = fn->config->cdev->req; struct g_audio *agdev = func_to_g_audio(fn); struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 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 ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { struct cntrl_ranges_lay3_srates rs; int i; int wNumSubRanges = 0; int srate; int *srates; if (entity_id == USB_IN_CLK_ID) srates = opts->p_srates; else if (entity_id == USB_OUT_CLK_ID) srates = opts->c_srates; else return -EOPNOTSUPP; for (i = 0; i < UAC_MAX_RATES; i++) { srate = srates[i]; if (srate == 0) break; rs.r[wNumSubRanges].dMIN = cpu_to_le32(srate); rs.r[wNumSubRanges].dMAX = cpu_to_le32(srate); rs.r[wNumSubRanges].dRES = 0; wNumSubRanges++; dev_dbg(&agdev->gadget->dev, "%s(): clk %d: rate ID %d: %d\n", __func__, entity_id, wNumSubRanges, srate); } rs.wNumSubRanges = cpu_to_le16(wNumSubRanges); value = min_t(unsigned int, w_length, ranges_lay3_size(rs)); dev_dbg(&agdev->gadget->dev, "%s(): sending %d rates, size %d\n", __func__, rs.wNumSubRanges, value); memcpy(req->buf, &rs, value); } else { dev_err(&agdev->gadget->dev, "%s:%d control_selector=%d TODO!\n", __func__, __LINE__, control_selector); } } else 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) { struct cntrl_range_lay2 r; s16 max_db, min_db, res_db; if (is_playback) { max_db = opts->p_volume_max; min_db = opts->p_volume_min; res_db = opts->p_volume_res; } else { max_db = opts->c_volume_max; min_db = opts->c_volume_min; res_db = opts->c_volume_res; } r.wMAX = cpu_to_le16(max_db); r.wMIN = cpu_to_le16(min_db); r.wRES = cpu_to_le16(res_db); r.wNumSubRanges = cpu_to_le16(1); value = min_t(unsigned int, w_length, sizeof(r)); memcpy(req->buf, &r, value); } else { dev_err(&agdev->gadget->dev, "%s:%d control_selector=%d TODO!\n", __func__, __LINE__, control_selector); } } else { dev_err(&agdev->gadget->dev, "%s:%d entity_id=%d control_selector=%d TODO!\n", __func__, __LINE__, entity_id, control_selector); } return value; } static int ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr) { if (cr->bRequest == UAC2_CS_CUR) return in_rq_cur(fn, cr); else if (cr->bRequest == UAC2_CS_RANGE) return in_rq_range(fn, cr); else return -EOPNOTSUPP; } static void uac2_cs_control_sam_freq(struct usb_ep *ep, struct usb_request *req) { struct usb_function *fn = ep->driver_data; struct g_audio *agdev = func_to_g_audio(fn); struct f_uac2 *uac2 = func_to_uac2(fn); u32 val; if (req->actual != 4) return; val = le32_to_cpu(*((__le32 *)req->buf)); dev_dbg(&agdev->gadget->dev, "%s val: %d.\n", __func__, val); if (uac2->clock_id == USB_IN_CLK_ID) { u_audio_set_playback_srate(agdev, val); } else if (uac2->clock_id == USB_OUT_CLK_ID) { u_audio_set_capture_srate(agdev, val); } } static void out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req) { struct g_audio *agdev = req->context; struct usb_composite_dev *cdev = agdev->func.config->cdev; struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); struct f_uac2 *uac2 = func_to_uac2(&agdev->func); struct usb_ctrlrequest *cr = &uac2->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(agdev, is_playback, mute); return; } else if (control_selector == UAC_FU_VOLUME) { struct cntrl_cur_lay2 *c = req->buf; s16 volume; volume = le16_to_cpu(c->wCUR); u_audio_set_volume(agdev, is_playback, volume); return; } else { dev_err(&agdev->gadget->dev, "%s:%d control_selector=%d TODO!\n", __func__, __LINE__, control_selector); usb_ep_set_halt(ep); } } } static int out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) { struct usb_composite_dev *cdev = fn->config->cdev; struct usb_request *req = fn->config->cdev->req; struct g_audio *agdev = func_to_g_audio(fn); struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); struct f_uac2 *uac2 = func_to_uac2(fn); 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; u8 clock_id = w_index >> 8; if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { dev_dbg(&agdev->gadget->dev, "control_selector UAC2_CS_CONTROL_SAM_FREQ, clock: %d\n", clock_id); cdev->gadget->ep0->driver_data = fn; uac2->clock_id = clock_id; req->complete = uac2_cs_control_sam_freq; return w_length; } } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { memcpy(&uac2->setup_cr, cr, sizeof(*cr)); req->context = agdev; req->complete = out_rq_cur_complete; return w_length; } else { dev_err(&agdev->gadget->dev, "%s:%d entity_id=%d control_selector=%d TODO!\n", __func__, __LINE__, entity_id, control_selector); } return -EOPNOTSUPP; } static int setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr) { struct f_uac2 *uac2 = func_to_uac2(fn); struct g_audio *agdev = func_to_g_audio(fn); u16 w_index = le16_to_cpu(cr->wIndex); u8 intf = w_index & 0xff; if (intf != uac2->ac_intf) { dev_err(&agdev->gadget->dev, "%s:%d Error!\n", __func__, __LINE__); return -EOPNOTSUPP; } if (cr->bRequestType & USB_DIR_IN) return ac_rq_in(fn, cr); else if (cr->bRequest == UAC2_CS_CUR) return out_rq_cur(fn, cr); return -EOPNOTSUPP; } static int afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr) { struct usb_composite_dev *cdev = fn->config->cdev; struct g_audio *agdev = func_to_g_audio(fn); struct usb_request *req = cdev->req; u16 w_length = le16_to_cpu(cr->wLength); int value = -EOPNOTSUPP; /* Only Class specific requests are supposed to reach here */ if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) return -EOPNOTSUPP; if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE) value = setup_rq_inf(fn, cr); else dev_err(&agdev->gadget->dev, "%s:%d Error!\n", __func__, __LINE__); if (value >= 0) { req->length = value; req->zero = value < w_length; value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); if (value < 0) { dev_err(&agdev->gadget->dev, "%s:%d Error!\n", __func__, __LINE__); req->status = 0; } } return value; } static inline struct f_uac2_opts *to_f_uac2_opts(struct config_item *item) { return container_of(to_config_group(item), struct f_uac2_opts, func_inst.group); } static void f_uac2_attr_release(struct config_item *item) { struct f_uac2_opts *opts = to_f_uac2_opts(item); usb_put_function_instance(&opts->func_inst); } static struct configfs_item_operations f_uac2_item_ops = { .release = f_uac2_attr_release, }; #define uac2_kstrtou8 kstrtou8 #define uac2_kstrtou32 kstrtou32 #define uac2_kstrtos16 kstrtos16 #define uac2_kstrtobool(s, base, res) kstrtobool((s), (res)) static const char *u8_fmt = "%u\n"; static const char *u32_fmt = "%u\n"; static const char *s16_fmt = "%hd\n"; static const char *bool_fmt = "%u\n"; #define UAC2_ATTRIBUTE(type, name) \ static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ char *page) \ { \ struct f_uac2_opts *opts = to_f_uac2_opts(item); \ int result; \ \ mutex_lock(&opts->lock); \ result = sprintf(page, type##_fmt, opts->name); \ mutex_unlock(&opts->lock); \ \ return result; \ } \ \ static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ const char *page, size_t len) \ { \ struct f_uac2_opts *opts = to_f_uac2_opts(item); \ int ret; \ type num; \ \ mutex_lock(&opts->lock); \ if (opts->refcnt) { \ ret = -EBUSY; \ goto end; \ } \ \ ret = uac2_kstrto##type(page, 0, &num); \ if (ret) \ goto end; \ \ opts->name = num; \ ret = len; \ \ end: \ mutex_unlock(&opts->lock); \ return ret; \ } \ \ CONFIGFS_ATTR(f_uac2_opts_, name) #define UAC2_ATTRIBUTE_SYNC(name) \ static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ char *page) \ { \ struct f_uac2_opts *opts = to_f_uac2_opts(item); \ int result; \ char *str; \ \ mutex_lock(&opts->lock); \ switch (opts->name) { \ case USB_ENDPOINT_SYNC_ASYNC: \ str = "async"; \ break; \ case USB_ENDPOINT_SYNC_ADAPTIVE: \ str = "adaptive"; \ break; \ default: \ str = "unknown"; \ break; \ } \ result = sprintf(page, "%s\n", str); \ mutex_unlock(&opts->lock); \ \ return result; \ } \ \ static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ const char *page, size_t len) \ { \ struct f_uac2_opts *opts = to_f_uac2_opts(item); \ int ret = 0; \ \ mutex_lock(&opts->lock); \ if (opts->refcnt) { \ ret = -EBUSY; \ goto end; \ } \ \ if (!strncmp(page, "async", 5)) \ opts->name = USB_ENDPOINT_SYNC_ASYNC; \ else if (!strncmp(page, "adaptive", 8)) \ opts->name = USB_ENDPOINT_SYNC_ADAPTIVE; \ else { \ ret = -EINVAL; \ goto end; \ } \ \ ret = len; \ \ end: \ mutex_unlock(&opts->lock); \ return ret; \ } \ \ CONFIGFS_ATTR(f_uac2_opts_, name) #define UAC2_RATE_ATTRIBUTE(name) \ static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ char *page) \ { \ struct f_uac2_opts *opts = to_f_uac2_opts(item); \ int result = 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_uac2_opts_##name##_store(struct config_item *item, \ const char *page, size_t len) \ { \ struct f_uac2_opts *opts = to_f_uac2_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_uac2_opts_, name) #define UAC2_ATTRIBUTE_STRING(name) \ static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ char *page) \ { \ struct f_uac2_opts *opts = to_f_uac2_opts(item); \ int result; \ \ mutex_lock(&opts->lock); \ result = snprintf(page, sizeof(opts->name), "%s", opts->name); \ mutex_unlock(&opts->lock); \ \ return result; \ } \ \ static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ const char *page, size_t len) \ { \ struct f_uac2_opts *opts = to_f_uac2_opts(item); \ int ret = 0; \ \ mutex_lock(&opts->lock); \ if (opts->refcnt) { \ ret = -EBUSY; \ goto end; \ } \ \ ret = snprintf(opts->name, min(sizeof(opts->name), len), \ "%s", page); \ \ end: \ mutex_unlock(&opts->lock); \ return ret; \ } \ \ CONFIGFS_ATTR(f_uac2_opts_, name) UAC2_ATTRIBUTE(u32, p_chmask); UAC2_RATE_ATTRIBUTE(p_srate); UAC2_ATTRIBUTE(u32, p_ssize); UAC2_ATTRIBUTE(u8, p_hs_bint); UAC2_ATTRIBUTE(u32, c_chmask); UAC2_RATE_ATTRIBUTE(c_srate); UAC2_ATTRIBUTE_SYNC(c_sync); UAC2_ATTRIBUTE(u32, c_ssize); UAC2_ATTRIBUTE(u8, c_hs_bint); UAC2_ATTRIBUTE(u32, req_number); UAC2_ATTRIBUTE(bool, p_mute_present); UAC2_ATTRIBUTE(bool, p_volume_present); UAC2_ATTRIBUTE(s16, p_volume_min); UAC2_ATTRIBUTE(s16, p_volume_max); UAC2_ATTRIBUTE(s16, p_volume_res); UAC2_ATTRIBUTE(bool, c_mute_present); UAC2_ATTRIBUTE(bool, c_volume_present); UAC2_ATTRIBUTE(s16, c_volume_min); UAC2_ATTRIBUTE(s16, c_volume_max); UAC2_ATTRIBUTE(s16, c_volume_res); UAC2_ATTRIBUTE(u32, fb_max); UAC2_ATTRIBUTE_STRING(function_name); static struct configfs_attribute *f_uac2_attrs[] = { &f_uac2_opts_attr_p_chmask, &f_uac2_opts_attr_p_srate, &f_uac2_opts_attr_p_ssize, &f_uac2_opts_attr_p_hs_bint, &f_uac2_opts_attr_c_chmask, &f_uac2_opts_attr_c_srate, &f_uac2_opts_attr_c_ssize, &f_uac2_opts_attr_c_hs_bint, &f_uac2_opts_attr_c_sync, &f_uac2_opts_attr_req_number, &f_uac2_opts_attr_fb_max, &f_uac2_opts_attr_p_mute_present, &f_uac2_opts_attr_p_volume_present, &f_uac2_opts_attr_p_volume_min, &f_uac2_opts_attr_p_volume_max, &f_uac2_opts_attr_p_volume_res, &f_uac2_opts_attr_c_mute_present, &f_uac2_opts_attr_c_volume_present, &f_uac2_opts_attr_c_volume_min, &f_uac2_opts_attr_c_volume_max, &f_uac2_opts_attr_c_volume_res, &f_uac2_opts_attr_function_name, NULL, }; static const struct config_item_type f_uac2_func_type = { .ct_item_ops = &f_uac2_item_ops, .ct_attrs = f_uac2_attrs, .ct_owner = THIS_MODULE, }; static void afunc_free_inst(struct usb_function_instance *f) { struct f_uac2_opts *opts; opts = container_of(f, struct f_uac2_opts, func_inst); kfree(opts); } static struct usb_function_instance *afunc_alloc_inst(void) { struct f_uac2_opts *opts; opts = kzalloc(sizeof(*opts), GFP_KERNEL); if (!opts) return ERR_PTR(-ENOMEM); mutex_init(&opts->lock); opts->func_inst.free_func_inst = afunc_free_inst; config_group_init_type_name(&opts->func_inst.group, "", &f_uac2_func_type); opts->p_chmask = UAC2_DEF_PCHMASK; opts->p_srates[0] = UAC2_DEF_PSRATE; opts->p_ssize = UAC2_DEF_PSSIZE; opts->p_hs_bint = UAC2_DEF_PHSBINT; opts->c_chmask = UAC2_DEF_CCHMASK; opts->c_srates[0] = UAC2_DEF_CSRATE; opts->c_ssize = UAC2_DEF_CSSIZE; opts->c_hs_bint = UAC2_DEF_CHSBINT; opts->c_sync = UAC2_DEF_CSYNC; opts->p_mute_present = UAC2_DEF_MUTE_PRESENT; opts->p_volume_present = UAC2_DEF_VOLUME_PRESENT; opts->p_volume_min = UAC2_DEF_MIN_DB; opts->p_volume_max = UAC2_DEF_MAX_DB; opts->p_volume_res = UAC2_DEF_RES_DB; opts->c_mute_present = UAC2_DEF_MUTE_PRESENT; opts->c_volume_present = UAC2_DEF_VOLUME_PRESENT; opts->c_volume_min = UAC2_DEF_MIN_DB; opts->c_volume_max = UAC2_DEF_MAX_DB; opts->c_volume_res = UAC2_DEF_RES_DB; opts->req_number = UAC2_DEF_REQ_NUM; opts->fb_max = FBACK_FAST_MAX; snprintf(opts->function_name, sizeof(opts->function_name), "Source/Sink"); return &opts->func_inst; } static void afunc_free(struct usb_function *f) { struct g_audio *agdev; struct f_uac2_opts *opts; agdev = func_to_g_audio(f); opts = container_of(f->fi, struct f_uac2_opts, func_inst); kfree(agdev); mutex_lock(&opts->lock); --opts->refcnt; mutex_unlock(&opts->lock); } static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) { struct g_audio *agdev = func_to_g_audio(f); g_audio_cleanup(agdev); usb_free_all_descriptors(f); agdev->gadget = NULL; kfree(out_feature_unit_desc); out_feature_unit_desc = NULL; kfree(in_feature_unit_desc); in_feature_unit_desc = NULL; } static struct usb_function *afunc_alloc(struct usb_function_instance *fi) { struct f_uac2 *uac2; struct f_uac2_opts *opts; uac2 = kzalloc(sizeof(*uac2), GFP_KERNEL); if (uac2 == NULL) return ERR_PTR(-ENOMEM); opts = container_of(fi, struct f_uac2_opts, func_inst); mutex_lock(&opts->lock); ++opts->refcnt; mutex_unlock(&opts->lock); uac2->g_audio.func.name = "uac2_func"; uac2->g_audio.func.bind = afunc_bind; uac2->g_audio.func.unbind = afunc_unbind; uac2->g_audio.func.set_alt = afunc_set_alt; uac2->g_audio.func.get_alt = afunc_get_alt; uac2->g_audio.func.disable = afunc_disable; uac2->g_audio.func.suspend = afunc_suspend; uac2->g_audio.func.setup = afunc_setup; uac2->g_audio.func.free_func = afunc_free; return &uac2->g_audio.func; } DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Yadwinder Singh"); MODULE_AUTHOR("Jaswinder Singh"); MODULE_AUTHOR("Ruslan Bilovol");
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