From 104165686ea388ddec6ec2834bf2c13873fbe91a Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 7 Jun 2017 14:07:01 +0300 Subject: usb: gadget: udc: add a 'function' sysfs file This file will print out the name of the currently running USB Gadget Driver. It can be read even when there are no functions loaded. Suggested-by: Alan Stern Signed-off-by: Felipe Balbi --- Documentation/ABI/stable/sysfs-class-udc | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/stable/sysfs-class-udc b/Documentation/ABI/stable/sysfs-class-udc index 85d3dac2e204..7370deb87f87 100644 --- a/Documentation/ABI/stable/sysfs-class-udc +++ b/Documentation/ABI/stable/sysfs-class-udc @@ -91,3 +91,11 @@ Description: 'configured', and 'suspended'; however not all USB Device Controllers support reporting all states. Users: + +What: /sys/class/udc//function +Date: June 2017 +KernelVersion: 4.13 +Contact: Felipe Balbi +Description: + Prints out name of currently running USB Gadget Driver. +Users: -- cgit v1.2.3 From 1aed4178ec7d4350019bc4211463deb5543e3e95 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 7 Jun 2017 14:08:18 +0300 Subject: Documentation: ABI: sysfs-class-udc: remove duplicated entry maximum_speed entry was duplicated. Remove one instance. Signed-off-by: Felipe Balbi --- Documentation/ABI/stable/sysfs-class-udc | 8 -------- 1 file changed, 8 deletions(-) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/stable/sysfs-class-udc b/Documentation/ABI/stable/sysfs-class-udc index 7370deb87f87..d1e2f3ec1fc9 100644 --- a/Documentation/ABI/stable/sysfs-class-udc +++ b/Documentation/ABI/stable/sysfs-class-udc @@ -55,14 +55,6 @@ Description: Indicates the maximum USB speed supported by this port. Users: -What: /sys/class/udc//maximum_speed -Date: June 2011 -KernelVersion: 3.1 -Contact: Felipe Balbi -Description: - Indicates the maximum USB speed supported by this port. -Users: - What: /sys/class/udc//soft_connect Date: June 2011 KernelVersion: 3.1 -- cgit v1.2.3 From d355339eecd986648420e05f8c958fbc78dbb382 Mon Sep 17 00:00:00 2001 From: Ruslan Bilovol Date: Sun, 18 Jun 2017 16:23:53 +0300 Subject: usb: gadget: function: make current f_uac1 implementation legacy Before introducing new f_uac1 function (with virtual ALSA card) make current implementation legacy. This includes renaming of existing files, some variables, config options and documentation Signed-off-by: Ruslan Bilovol Signed-off-by: Felipe Balbi --- Documentation/ABI/testing/configfs-usb-gadget-uac1 | 12 - .../ABI/testing/configfs-usb-gadget-uac1_legacy | 12 + Documentation/usb/gadget-testing.txt | 9 +- drivers/usb/gadget/Kconfig | 8 +- drivers/usb/gadget/function/Makefile | 4 +- drivers/usb/gadget/function/f_uac1.c | 1020 ------------------- drivers/usb/gadget/function/f_uac1_legacy.c | 1021 ++++++++++++++++++++ drivers/usb/gadget/function/u_uac1.c | 314 ------ drivers/usb/gadget/function/u_uac1.h | 82 -- drivers/usb/gadget/function/u_uac1_legacy.c | 315 ++++++ drivers/usb/gadget/function/u_uac1_legacy.h | 82 ++ drivers/usb/gadget/legacy/Kconfig | 6 +- drivers/usb/gadget/legacy/audio.c | 26 +- 13 files changed, 1457 insertions(+), 1454 deletions(-) delete mode 100644 Documentation/ABI/testing/configfs-usb-gadget-uac1 create mode 100644 Documentation/ABI/testing/configfs-usb-gadget-uac1_legacy delete mode 100644 drivers/usb/gadget/function/f_uac1.c create mode 100644 drivers/usb/gadget/function/f_uac1_legacy.c delete mode 100644 drivers/usb/gadget/function/u_uac1.c delete mode 100644 drivers/usb/gadget/function/u_uac1.h create mode 100644 drivers/usb/gadget/function/u_uac1_legacy.c create mode 100644 drivers/usb/gadget/function/u_uac1_legacy.h (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uac1 b/Documentation/ABI/testing/configfs-usb-gadget-uac1 deleted file mode 100644 index 8ba9a123316e..000000000000 --- a/Documentation/ABI/testing/configfs-usb-gadget-uac1 +++ /dev/null @@ -1,12 +0,0 @@ -What: /config/usb-gadget/gadget/functions/uac1.name -Date: Sep 2014 -KernelVersion: 3.18 -Description: - The attributes: - - audio_buf_size - audio buffer size - fn_cap - capture pcm device file name - fn_cntl - control device file name - fn_play - playback pcm device file name - req_buf_size - ISO OUT endpoint request buffer size - req_count - ISO OUT endpoint request count diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uac1_legacy b/Documentation/ABI/testing/configfs-usb-gadget-uac1_legacy new file mode 100644 index 000000000000..b2eaefd9bc49 --- /dev/null +++ b/Documentation/ABI/testing/configfs-usb-gadget-uac1_legacy @@ -0,0 +1,12 @@ +What: /config/usb-gadget/gadget/functions/uac1_legacy.name +Date: Sep 2014 +KernelVersion: 3.18 +Description: + The attributes: + + audio_buf_size - audio buffer size + fn_cap - capture pcm device file name + fn_cntl - control device file name + fn_play - playback pcm device file name + req_buf_size - ISO OUT endpoint request buffer size + req_count - ISO OUT endpoint request count diff --git a/Documentation/usb/gadget-testing.txt b/Documentation/usb/gadget-testing.txt index fb0cc4df1765..ce51d6e4e7d0 100644 --- a/Documentation/usb/gadget-testing.txt +++ b/Documentation/usb/gadget-testing.txt @@ -16,7 +16,7 @@ provided by gadgets. 13. RNDIS function 14. SERIAL function 15. SOURCESINK function -16. UAC1 function +16. UAC1 function (legacy implementation) 17. UAC2 function 18. UVC function 19. PRINTER function @@ -589,15 +589,16 @@ device: run the gadget host: test-usb (tools/usb/testusb.c) -16. UAC1 function +16. UAC1 function (legacy implementation) ================= -The function is provided by usb_f_uac1.ko module. +The function is provided by usb_f_uac1_legacy.ko module. Function-specific configfs interface ------------------------------------ -The function name to use when creating the function directory is "uac1". +The function name to use when creating the function directory +is "uac1_legacy". The uac1 function provides these attributes in its function directory: audio_buf_size - audio buffer size diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig index 3b0ffd6e515b..01c2e2b9ab1d 100644 --- a/drivers/usb/gadget/Kconfig +++ b/drivers/usb/gadget/Kconfig @@ -191,7 +191,7 @@ config USB_F_MASS_STORAGE config USB_F_FS tristate -config USB_F_UAC1 +config USB_F_UAC1_LEGACY tristate config USB_F_UAC2 @@ -365,13 +365,13 @@ config USB_CONFIGFS_F_FS implemented in kernel space (for instance Ethernet, serial or mass storage) and other are implemented in user space. -config USB_CONFIGFS_F_UAC1 - bool "Audio Class 1.0" +config USB_CONFIGFS_F_UAC1_LEGACY + bool "Audio Class 1.0 (legacy implementation)" depends on USB_CONFIGFS depends on SND select USB_LIBCOMPOSITE select SND_PCM - select USB_F_UAC1 + select USB_F_UAC1_LEGACY help This Audio function implements 1 AudioControl interface, 1 AudioStreaming Interface each for USB-OUT and USB-IN. diff --git a/drivers/usb/gadget/function/Makefile b/drivers/usb/gadget/function/Makefile index b29f2ae23357..50ee517faf74 100644 --- a/drivers/usb/gadget/function/Makefile +++ b/drivers/usb/gadget/function/Makefile @@ -33,8 +33,8 @@ obj-$(CONFIG_USB_F_MASS_STORAGE)+= usb_f_mass_storage.o usb_f_fs-y := f_fs.o obj-$(CONFIG_USB_F_FS) += usb_f_fs.o obj-$(CONFIG_USB_U_AUDIO) += u_audio.o -usb_f_uac1-y := f_uac1.o u_uac1.o -obj-$(CONFIG_USB_F_UAC1) += usb_f_uac1.o +usb_f_uac1_legacy-y := f_uac1_legacy.o u_uac1_legacy.o +obj-$(CONFIG_USB_F_UAC1_LEGACY) += usb_f_uac1_legacy.o usb_f_uac2-y := f_uac2.o obj-$(CONFIG_USB_F_UAC2) += usb_f_uac2.o usb_f_uvc-y := f_uvc.o uvc_queue.o uvc_v4l2.o uvc_video.o uvc_configfs.o diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c deleted file mode 100644 index 5dfc94b8e69a..000000000000 --- a/drivers/usb/gadget/function/f_uac1.c +++ /dev/null @@ -1,1020 +0,0 @@ -/* - * f_audio.c -- USB Audio class function driver - * - * Copyright (C) 2008 Bryan Wu - * Copyright (C) 2008 Analog Devices, Inc - * - * Enter bugs at http://blackfin.uclinux.org/ - * - * Licensed under the GPL-2 or later. - */ - -#include -#include -#include -#include -#include - -#include "u_uac1.h" - -static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value); -static int generic_get_cmd(struct usb_audio_control *con, u8 cmd); - -/* - * DESCRIPTORS ... most are static, but strings and full - * configuration descriptors are built on demand. - */ - -/* - * We have two interfaces- AudioControl and AudioStreaming - * TODO: only supcard playback currently - */ -#define F_AUDIO_AC_INTERFACE 0 -#define F_AUDIO_AS_INTERFACE 1 -#define F_AUDIO_NUM_INTERFACES 1 - -/* B.3.1 Standard AC Interface Descriptor */ -static struct usb_interface_descriptor ac_interface_desc = { - .bLength = USB_DT_INTERFACE_SIZE, - .bDescriptorType = USB_DT_INTERFACE, - .bNumEndpoints = 0, - .bInterfaceClass = USB_CLASS_AUDIO, - .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, -}; - -/* - * The number of AudioStreaming and MIDIStreaming interfaces - * in the Audio Interface Collection - */ -DECLARE_UAC_AC_HEADER_DESCRIPTOR(1); - -#define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES) -/* 1 input terminal, 1 output terminal and 1 feature unit */ -#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \ - + UAC_DT_OUTPUT_TERMINAL_SIZE + UAC_DT_FEATURE_UNIT_SIZE(0)) -/* B.3.2 Class-Specific AC Interface Descriptor */ -static struct uac1_ac_header_descriptor_1 ac_header_desc = { - .bLength = UAC_DT_AC_HEADER_LENGTH, - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = UAC_HEADER, - .bcdADC = __constant_cpu_to_le16(0x0100), - .wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH), - .bInCollection = F_AUDIO_NUM_INTERFACES, - .baInterfaceNr = { - /* Interface number of the first AudioStream interface */ - [0] = 1, - } -}; - -#define INPUT_TERMINAL_ID 1 -static struct uac_input_terminal_descriptor input_terminal_desc = { - .bLength = UAC_DT_INPUT_TERMINAL_SIZE, - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = UAC_INPUT_TERMINAL, - .bTerminalID = INPUT_TERMINAL_ID, - .wTerminalType = UAC_TERMINAL_STREAMING, - .bAssocTerminal = 0, - .wChannelConfig = 0x3, -}; - -DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0); - -#define FEATURE_UNIT_ID 2 -static struct uac_feature_unit_descriptor_0 feature_unit_desc = { - .bLength = UAC_DT_FEATURE_UNIT_SIZE(0), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = UAC_FEATURE_UNIT, - .bUnitID = FEATURE_UNIT_ID, - .bSourceID = INPUT_TERMINAL_ID, - .bControlSize = 2, - .bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME), -}; - -static struct usb_audio_control mute_control = { - .list = LIST_HEAD_INIT(mute_control.list), - .name = "Mute Control", - .type = UAC_FU_MUTE, - /* Todo: add real Mute control code */ - .set = generic_set_cmd, - .get = generic_get_cmd, -}; - -static struct usb_audio_control volume_control = { - .list = LIST_HEAD_INIT(volume_control.list), - .name = "Volume Control", - .type = UAC_FU_VOLUME, - /* Todo: add real Volume control code */ - .set = generic_set_cmd, - .get = generic_get_cmd, -}; - -static struct usb_audio_control_selector feature_unit = { - .list = LIST_HEAD_INIT(feature_unit.list), - .id = FEATURE_UNIT_ID, - .name = "Mute & Volume Control", - .type = UAC_FEATURE_UNIT, - .desc = (struct usb_descriptor_header *)&feature_unit_desc, -}; - -#define OUTPUT_TERMINAL_ID 3 -static struct uac1_output_terminal_descriptor output_terminal_desc = { - .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE, - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, - .bTerminalID = OUTPUT_TERMINAL_ID, - .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER, - .bAssocTerminal = FEATURE_UNIT_ID, - .bSourceID = FEATURE_UNIT_ID, -}; - -/* B.4.1 Standard AS Interface Descriptor */ -static struct usb_interface_descriptor as_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_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_header_desc = { - .bLength = UAC_DT_AS_HEADER_SIZE, - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = UAC_AS_GENERAL, - .bTerminalLink = INPUT_TERMINAL_ID, - .bDelay = 1, - .wFormatTag = UAC_FORMAT_TYPE_I_PCM, -}; - -DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1); - -static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = { - .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1), - .bDescriptorType = USB_DT_CS_INTERFACE, - .bDescriptorSubtype = UAC_FORMAT_TYPE, - .bFormatType = UAC_FORMAT_TYPE_I, - .bSubframeSize = 2, - .bBitResolution = 16, - .bSamFreqType = 1, -}; - -/* Standard ISO OUT Endpoint Descriptor */ -static struct usb_endpoint_descriptor as_out_ep_desc = { - .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, - .bDescriptorType = USB_DT_ENDPOINT, - .bEndpointAddress = USB_DIR_OUT, - .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE - | USB_ENDPOINT_XFER_ISOC, - .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 = __constant_cpu_to_le16(1), -}; - -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 *)&input_terminal_desc, - (struct usb_descriptor_header *)&output_terminal_desc, - (struct usb_descriptor_header *)&feature_unit_desc, - - (struct usb_descriptor_header *)&as_interface_alt_0_desc, - (struct usb_descriptor_header *)&as_interface_alt_1_desc, - (struct usb_descriptor_header *)&as_header_desc, - - (struct usb_descriptor_header *)&as_type_i_desc, - - (struct usb_descriptor_header *)&as_out_ep_desc, - (struct usb_descriptor_header *)&as_iso_out_desc, - NULL, -}; - -enum { - STR_AC_IF, - STR_INPUT_TERMINAL, - STR_INPUT_TERMINAL_CH_NAMES, - STR_FEAT_DESC_0, - STR_OUTPUT_TERMINAL, - STR_AS_IF_ALT0, - STR_AS_IF_ALT1, -}; - -static struct usb_string strings_uac1[] = { - [STR_AC_IF].s = "AC Interface", - [STR_INPUT_TERMINAL].s = "Input terminal", - [STR_INPUT_TERMINAL_CH_NAMES].s = "Channels", - [STR_FEAT_DESC_0].s = "Volume control & mute", - [STR_OUTPUT_TERMINAL].s = "Output terminal", - [STR_AS_IF_ALT0].s = "AS Interface", - [STR_AS_IF_ALT1].s = "AS Interface", - { }, -}; - -static struct usb_gadget_strings str_uac1 = { - .language = 0x0409, /* en-us */ - .strings = strings_uac1, -}; - -static struct usb_gadget_strings *uac1_strings[] = { - &str_uac1, - NULL, -}; - -/* - * This function is an ALSA sound card following USB Audio Class Spec 1.0. - */ - -/*-------------------------------------------------------------------------*/ -struct f_audio_buf { - u8 *buf; - int actual; - struct list_head list; -}; - -static struct f_audio_buf *f_audio_buffer_alloc(int buf_size) -{ - struct f_audio_buf *copy_buf; - - copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC); - if (!copy_buf) - return ERR_PTR(-ENOMEM); - - copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC); - if (!copy_buf->buf) { - kfree(copy_buf); - return ERR_PTR(-ENOMEM); - } - - return copy_buf; -} - -static void f_audio_buffer_free(struct f_audio_buf *audio_buf) -{ - kfree(audio_buf->buf); - kfree(audio_buf); -} -/*-------------------------------------------------------------------------*/ - -struct f_audio { - struct gaudio card; - - u8 ac_intf, ac_alt; - u8 as_intf, as_alt; - - /* endpoints handle full and/or high speeds */ - struct usb_ep *out_ep; - - spinlock_t lock; - struct f_audio_buf *copy_buf; - struct work_struct playback_work; - struct list_head play_queue; - - /* Control Set command */ - struct list_head cs; - u8 set_cmd; - struct usb_audio_control *set_con; -}; - -static inline struct f_audio *func_to_audio(struct usb_function *f) -{ - return container_of(f, struct f_audio, card.func); -} - -/*-------------------------------------------------------------------------*/ - -static void f_audio_playback_work(struct work_struct *data) -{ - struct f_audio *audio = container_of(data, struct f_audio, - playback_work); - struct f_audio_buf *play_buf; - - spin_lock_irq(&audio->lock); - if (list_empty(&audio->play_queue)) { - spin_unlock_irq(&audio->lock); - return; - } - play_buf = list_first_entry(&audio->play_queue, - struct f_audio_buf, list); - list_del(&play_buf->list); - spin_unlock_irq(&audio->lock); - - u_audio_playback(&audio->card, play_buf->buf, play_buf->actual); - f_audio_buffer_free(play_buf); -} - -static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req) -{ - struct f_audio *audio = req->context; - struct usb_composite_dev *cdev = audio->card.func.config->cdev; - struct f_audio_buf *copy_buf = audio->copy_buf; - struct f_uac1_opts *opts; - int audio_buf_size; - int err; - - opts = container_of(audio->card.func.fi, struct f_uac1_opts, - func_inst); - audio_buf_size = opts->audio_buf_size; - - if (!copy_buf) - return -EINVAL; - - /* Copy buffer is full, add it to the play_queue */ - if (audio_buf_size - copy_buf->actual < req->actual) { - list_add_tail(©_buf->list, &audio->play_queue); - schedule_work(&audio->playback_work); - copy_buf = f_audio_buffer_alloc(audio_buf_size); - if (IS_ERR(copy_buf)) - return -ENOMEM; - } - - memcpy(copy_buf->buf + copy_buf->actual, req->buf, req->actual); - copy_buf->actual += req->actual; - audio->copy_buf = copy_buf; - - err = usb_ep_queue(ep, req, GFP_ATOMIC); - if (err) - ERROR(cdev, "%s queue req: %d\n", ep->name, err); - - return 0; - -} - -static void f_audio_complete(struct usb_ep *ep, struct usb_request *req) -{ - struct f_audio *audio = req->context; - int status = req->status; - u32 data = 0; - struct usb_ep *out_ep = audio->out_ep; - - switch (status) { - - case 0: /* normal completion? */ - if (ep == out_ep) - f_audio_out_ep_complete(ep, req); - else if (audio->set_con) { - memcpy(&data, req->buf, req->length); - audio->set_con->set(audio->set_con, audio->set_cmd, - le16_to_cpu(data)); - audio->set_con = NULL; - } - break; - default: - break; - } -} - -static int audio_set_intf_req(struct usb_function *f, - const struct usb_ctrlrequest *ctrl) -{ - struct f_audio *audio = func_to_audio(f); - struct usb_composite_dev *cdev = f->config->cdev; - struct usb_request *req = cdev->req; - u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); - u16 len = le16_to_cpu(ctrl->wLength); - u16 w_value = le16_to_cpu(ctrl->wValue); - u8 con_sel = (w_value >> 8) & 0xFF; - u8 cmd = (ctrl->bRequest & 0x0F); - struct usb_audio_control_selector *cs; - struct usb_audio_control *con; - - DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", - ctrl->bRequest, w_value, len, id); - - list_for_each_entry(cs, &audio->cs, list) { - if (cs->id == id) { - list_for_each_entry(con, &cs->control, list) { - if (con->type == con_sel) { - audio->set_con = con; - break; - } - } - break; - } - } - - audio->set_cmd = cmd; - req->context = audio; - req->complete = f_audio_complete; - - return len; -} - -static int audio_get_intf_req(struct usb_function *f, - const struct usb_ctrlrequest *ctrl) -{ - struct f_audio *audio = func_to_audio(f); - struct usb_composite_dev *cdev = f->config->cdev; - struct usb_request *req = cdev->req; - int value = -EOPNOTSUPP; - u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); - u16 len = le16_to_cpu(ctrl->wLength); - u16 w_value = le16_to_cpu(ctrl->wValue); - u8 con_sel = (w_value >> 8) & 0xFF; - u8 cmd = (ctrl->bRequest & 0x0F); - struct usb_audio_control_selector *cs; - struct usb_audio_control *con; - - DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", - ctrl->bRequest, w_value, len, id); - - list_for_each_entry(cs, &audio->cs, list) { - if (cs->id == id) { - list_for_each_entry(con, &cs->control, list) { - if (con->type == con_sel && con->get) { - value = con->get(con, cmd); - break; - } - } - break; - } - } - - req->context = audio; - req->complete = f_audio_complete; - len = min_t(size_t, sizeof(value), len); - memcpy(req->buf, &value, len); - - return len; -} - -static int audio_set_endpoint_req(struct usb_function *f, - const struct usb_ctrlrequest *ctrl) -{ - struct usb_composite_dev *cdev = f->config->cdev; - int value = -EOPNOTSUPP; - u16 ep = le16_to_cpu(ctrl->wIndex); - u16 len = le16_to_cpu(ctrl->wLength); - u16 w_value = le16_to_cpu(ctrl->wValue); - - DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", - ctrl->bRequest, w_value, len, ep); - - switch (ctrl->bRequest) { - case UAC_SET_CUR: - value = len; - break; - - case UAC_SET_MIN: - break; - - case UAC_SET_MAX: - break; - - case UAC_SET_RES: - break; - - case UAC_SET_MEM: - break; - - default: - break; - } - - return value; -} - -static int audio_get_endpoint_req(struct usb_function *f, - const struct usb_ctrlrequest *ctrl) -{ - struct usb_composite_dev *cdev = f->config->cdev; - int value = -EOPNOTSUPP; - u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); - u16 len = le16_to_cpu(ctrl->wLength); - u16 w_value = le16_to_cpu(ctrl->wValue); - - DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", - ctrl->bRequest, w_value, len, ep); - - switch (ctrl->bRequest) { - case UAC_GET_CUR: - case UAC_GET_MIN: - case UAC_GET_MAX: - case UAC_GET_RES: - value = len; - break; - case UAC_GET_MEM: - break; - default: - break; - } - - return value; -} - -static int -f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) -{ - struct usb_composite_dev *cdev = f->config->cdev; - struct usb_request *req = cdev->req; - int value = -EOPNOTSUPP; - u16 w_index = le16_to_cpu(ctrl->wIndex); - u16 w_value = le16_to_cpu(ctrl->wValue); - u16 w_length = le16_to_cpu(ctrl->wLength); - - /* composite driver infrastructure handles everything; interface - * activation uses set_alt(). - */ - switch (ctrl->bRequestType) { - case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE: - value = audio_set_intf_req(f, ctrl); - break; - - case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE: - value = audio_get_intf_req(f, ctrl); - break; - - case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: - value = audio_set_endpoint_req(f, ctrl); - break; - - case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: - value = audio_get_endpoint_req(f, ctrl); - break; - - default: - ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", - ctrl->bRequestType, ctrl->bRequest, - w_value, w_index, w_length); - } - - /* respond with data transfer or status phase? */ - if (value >= 0) { - DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n", - ctrl->bRequestType, ctrl->bRequest, - w_value, w_index, w_length); - req->zero = 0; - req->length = value; - value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); - if (value < 0) - ERROR(cdev, "audio response on err %d\n", value); - } - - /* device either stalls (value < 0) or reports success */ - return value; -} - -static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) -{ - struct f_audio *audio = func_to_audio(f); - struct usb_composite_dev *cdev = f->config->cdev; - struct usb_ep *out_ep = audio->out_ep; - struct usb_request *req; - struct f_uac1_opts *opts; - int req_buf_size, req_count, audio_buf_size; - int i = 0, err = 0; - - DBG(cdev, "intf %d, alt %d\n", intf, alt); - - opts = container_of(f->fi, struct f_uac1_opts, func_inst); - req_buf_size = opts->req_buf_size; - req_count = opts->req_count; - audio_buf_size = opts->audio_buf_size; - - /* No i/f has more than 2 alt settings */ - if (alt > 1) { - ERROR(cdev, "%s:%d Error!\n", __func__, __LINE__); - return -EINVAL; - } - - if (intf == audio->ac_intf) { - /* Control I/f has only 1 AltSetting - 0 */ - if (alt) { - ERROR(cdev, "%s:%d Error!\n", __func__, __LINE__); - return -EINVAL; - } - return 0; - } else if (intf == audio->as_intf) { - if (alt == 1) { - err = config_ep_by_speed(cdev->gadget, f, out_ep); - if (err) - return err; - - usb_ep_enable(out_ep); - audio->copy_buf = f_audio_buffer_alloc(audio_buf_size); - if (IS_ERR(audio->copy_buf)) - return -ENOMEM; - - /* - * allocate a bunch of read buffers - * and queue them all at once. - */ - for (i = 0; i < req_count && err == 0; i++) { - req = usb_ep_alloc_request(out_ep, GFP_ATOMIC); - if (req) { - req->buf = kzalloc(req_buf_size, - GFP_ATOMIC); - if (req->buf) { - req->length = req_buf_size; - req->context = audio; - req->complete = - f_audio_complete; - err = usb_ep_queue(out_ep, - req, GFP_ATOMIC); - if (err) - ERROR(cdev, - "%s queue req: %d\n", - out_ep->name, err); - } else - err = -ENOMEM; - } else - err = -ENOMEM; - } - - } else { - struct f_audio_buf *copy_buf = audio->copy_buf; - if (copy_buf) { - list_add_tail(©_buf->list, - &audio->play_queue); - schedule_work(&audio->playback_work); - } - } - audio->as_alt = alt; - } - - return err; -} - -static int f_audio_get_alt(struct usb_function *f, unsigned intf) -{ - struct f_audio *audio = func_to_audio(f); - struct usb_composite_dev *cdev = f->config->cdev; - - if (intf == audio->ac_intf) - return audio->ac_alt; - else if (intf == audio->as_intf) - return audio->as_alt; - else - ERROR(cdev, "%s:%d Invalid Interface %d!\n", - __func__, __LINE__, intf); - - return -EINVAL; -} - -static void f_audio_disable(struct usb_function *f) -{ - return; -} - -/*-------------------------------------------------------------------------*/ - -static void f_audio_build_desc(struct f_audio *audio) -{ - struct gaudio *card = &audio->card; - u8 *sam_freq; - int rate; - - /* Set channel numbers */ - input_terminal_desc.bNrChannels = u_audio_get_playback_channels(card); - as_type_i_desc.bNrChannels = u_audio_get_playback_channels(card); - - /* Set sample rates */ - rate = u_audio_get_playback_rate(card); - sam_freq = as_type_i_desc.tSamFreq[0]; - memcpy(sam_freq, &rate, 3); - - /* Todo: Set Sample bits and other parameters */ - - return; -} - -/* audio function driver setup/binding */ -static int -f_audio_bind(struct usb_configuration *c, struct usb_function *f) -{ - struct usb_composite_dev *cdev = c->cdev; - struct f_audio *audio = func_to_audio(f); - struct usb_string *us; - int status; - struct usb_ep *ep = NULL; - struct f_uac1_opts *audio_opts; - - audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst); - audio->card.gadget = c->cdev->gadget; - /* set up ASLA audio devices */ - if (!audio_opts->bound) { - status = gaudio_setup(&audio->card); - if (status < 0) - return status; - audio_opts->bound = true; - } - us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1)); - if (IS_ERR(us)) - return PTR_ERR(us); - ac_interface_desc.iInterface = us[STR_AC_IF].id; - input_terminal_desc.iTerminal = us[STR_INPUT_TERMINAL].id; - input_terminal_desc.iChannelNames = us[STR_INPUT_TERMINAL_CH_NAMES].id; - feature_unit_desc.iFeature = us[STR_FEAT_DESC_0].id; - output_terminal_desc.iTerminal = us[STR_OUTPUT_TERMINAL].id; - as_interface_alt_0_desc.iInterface = us[STR_AS_IF_ALT0].id; - as_interface_alt_1_desc.iInterface = us[STR_AS_IF_ALT1].id; - - - f_audio_build_desc(audio); - - /* allocate instance-specific interface IDs, and patch descriptors */ - status = usb_interface_id(c, f); - if (status < 0) - goto fail; - ac_interface_desc.bInterfaceNumber = status; - audio->ac_intf = status; - audio->ac_alt = 0; - - status = usb_interface_id(c, f); - if (status < 0) - goto fail; - as_interface_alt_0_desc.bInterfaceNumber = status; - as_interface_alt_1_desc.bInterfaceNumber = status; - audio->as_intf = status; - audio->as_alt = 0; - - status = -ENODEV; - - /* allocate instance-specific endpoints */ - ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc); - if (!ep) - goto fail; - audio->out_ep = ep; - audio->out_ep->desc = &as_out_ep_desc; - - status = -ENOMEM; - - /* copy descriptors, and track endpoint copies */ - status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL, - NULL); - if (status) - goto fail; - return 0; - -fail: - gaudio_cleanup(&audio->card); - return status; -} - -/*-------------------------------------------------------------------------*/ - -static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value) -{ - con->data[cmd] = value; - - return 0; -} - -static int generic_get_cmd(struct usb_audio_control *con, u8 cmd) -{ - return con->data[cmd]; -} - -/* Todo: add more control selecotor dynamically */ -static int control_selector_init(struct f_audio *audio) -{ - INIT_LIST_HEAD(&audio->cs); - list_add(&feature_unit.list, &audio->cs); - - INIT_LIST_HEAD(&feature_unit.control); - list_add(&mute_control.list, &feature_unit.control); - list_add(&volume_control.list, &feature_unit.control); - - volume_control.data[UAC__CUR] = 0xffc0; - volume_control.data[UAC__MIN] = 0xe3a0; - volume_control.data[UAC__MAX] = 0xfff0; - volume_control.data[UAC__RES] = 0x0030; - - return 0; -} - -static inline struct f_uac1_opts *to_f_uac1_opts(struct config_item *item) -{ - return container_of(to_config_group(item), struct f_uac1_opts, - func_inst.group); -} - -static void f_uac1_attr_release(struct config_item *item) -{ - struct f_uac1_opts *opts = to_f_uac1_opts(item); - - usb_put_function_instance(&opts->func_inst); -} - -static struct configfs_item_operations f_uac1_item_ops = { - .release = f_uac1_attr_release, -}; - -#define UAC1_INT_ATTRIBUTE(name) \ -static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \ - char *page) \ -{ \ - struct f_uac1_opts *opts = to_f_uac1_opts(item); \ - int result; \ - \ - mutex_lock(&opts->lock); \ - result = sprintf(page, "%u\n", opts->name); \ - mutex_unlock(&opts->lock); \ - \ - return result; \ -} \ - \ -static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ - const char *page, size_t len) \ -{ \ - struct f_uac1_opts *opts = to_f_uac1_opts(item); \ - int ret; \ - u32 num; \ - \ - mutex_lock(&opts->lock); \ - if (opts->refcnt) { \ - ret = -EBUSY; \ - goto end; \ - } \ - \ - ret = kstrtou32(page, 0, &num); \ - if (ret) \ - goto end; \ - \ - opts->name = num; \ - ret = len; \ - \ -end: \ - mutex_unlock(&opts->lock); \ - return ret; \ -} \ - \ -CONFIGFS_ATTR(f_uac1_opts_, name) - -UAC1_INT_ATTRIBUTE(req_buf_size); -UAC1_INT_ATTRIBUTE(req_count); -UAC1_INT_ATTRIBUTE(audio_buf_size); - -#define UAC1_STR_ATTRIBUTE(name) \ -static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \ - char *page) \ -{ \ - struct f_uac1_opts *opts = to_f_uac1_opts(item); \ - int result; \ - \ - mutex_lock(&opts->lock); \ - result = sprintf(page, "%s\n", opts->name); \ - mutex_unlock(&opts->lock); \ - \ - return result; \ -} \ - \ -static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ - const char *page, size_t len) \ -{ \ - struct f_uac1_opts *opts = to_f_uac1_opts(item); \ - int ret = -EBUSY; \ - char *tmp; \ - \ - mutex_lock(&opts->lock); \ - if (opts->refcnt) \ - goto end; \ - \ - tmp = kstrndup(page, len, GFP_KERNEL); \ - if (tmp) { \ - ret = -ENOMEM; \ - goto end; \ - } \ - if (opts->name##_alloc) \ - kfree(opts->name); \ - opts->name##_alloc = true; \ - opts->name = tmp; \ - ret = len; \ - \ -end: \ - mutex_unlock(&opts->lock); \ - return ret; \ -} \ - \ -CONFIGFS_ATTR(f_uac1_opts_, name) - -UAC1_STR_ATTRIBUTE(fn_play); -UAC1_STR_ATTRIBUTE(fn_cap); -UAC1_STR_ATTRIBUTE(fn_cntl); - -static struct configfs_attribute *f_uac1_attrs[] = { - &f_uac1_opts_attr_req_buf_size, - &f_uac1_opts_attr_req_count, - &f_uac1_opts_attr_audio_buf_size, - &f_uac1_opts_attr_fn_play, - &f_uac1_opts_attr_fn_cap, - &f_uac1_opts_attr_fn_cntl, - NULL, -}; - -static struct config_item_type f_uac1_func_type = { - .ct_item_ops = &f_uac1_item_ops, - .ct_attrs = f_uac1_attrs, - .ct_owner = THIS_MODULE, -}; - -static void f_audio_free_inst(struct usb_function_instance *f) -{ - struct f_uac1_opts *opts; - - opts = container_of(f, struct f_uac1_opts, func_inst); - if (opts->fn_play_alloc) - kfree(opts->fn_play); - if (opts->fn_cap_alloc) - kfree(opts->fn_cap); - if (opts->fn_cntl_alloc) - kfree(opts->fn_cntl); - kfree(opts); -} - -static struct usb_function_instance *f_audio_alloc_inst(void) -{ - struct f_uac1_opts *opts; - - opts = kzalloc(sizeof(*opts), GFP_KERNEL); - if (!opts) - return ERR_PTR(-ENOMEM); - - mutex_init(&opts->lock); - opts->func_inst.free_func_inst = f_audio_free_inst; - - config_group_init_type_name(&opts->func_inst.group, "", - &f_uac1_func_type); - - opts->req_buf_size = UAC1_OUT_EP_MAX_PACKET_SIZE; - opts->req_count = UAC1_REQ_COUNT; - opts->audio_buf_size = UAC1_AUDIO_BUF_SIZE; - opts->fn_play = FILE_PCM_PLAYBACK; - opts->fn_cap = FILE_PCM_CAPTURE; - opts->fn_cntl = FILE_CONTROL; - return &opts->func_inst; -} - -static void f_audio_free(struct usb_function *f) -{ - struct f_audio *audio = func_to_audio(f); - struct f_uac1_opts *opts; - - gaudio_cleanup(&audio->card); - opts = container_of(f->fi, struct f_uac1_opts, func_inst); - kfree(audio); - mutex_lock(&opts->lock); - --opts->refcnt; - mutex_unlock(&opts->lock); -} - -static void f_audio_unbind(struct usb_configuration *c, struct usb_function *f) -{ - usb_free_all_descriptors(f); -} - -static struct usb_function *f_audio_alloc(struct usb_function_instance *fi) -{ - struct f_audio *audio; - struct f_uac1_opts *opts; - - /* allocate and initialize one new instance */ - audio = kzalloc(sizeof(*audio), GFP_KERNEL); - if (!audio) - return ERR_PTR(-ENOMEM); - - audio->card.func.name = "g_audio"; - - opts = container_of(fi, struct f_uac1_opts, func_inst); - mutex_lock(&opts->lock); - ++opts->refcnt; - mutex_unlock(&opts->lock); - INIT_LIST_HEAD(&audio->play_queue); - spin_lock_init(&audio->lock); - - audio->card.func.bind = f_audio_bind; - audio->card.func.unbind = f_audio_unbind; - audio->card.func.set_alt = f_audio_set_alt; - audio->card.func.get_alt = f_audio_get_alt; - audio->card.func.setup = f_audio_setup; - audio->card.func.disable = f_audio_disable; - audio->card.func.free_func = f_audio_free; - - control_selector_init(audio); - - INIT_WORK(&audio->playback_work, f_audio_playback_work); - - return &audio->card.func; -} - -DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc); -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Bryan Wu"); diff --git a/drivers/usb/gadget/function/f_uac1_legacy.c b/drivers/usb/gadget/function/f_uac1_legacy.c new file mode 100644 index 000000000000..5d229e72912e --- /dev/null +++ b/drivers/usb/gadget/function/f_uac1_legacy.c @@ -0,0 +1,1021 @@ +/* + * f_audio.c -- USB Audio class function driver + * + * Copyright (C) 2008 Bryan Wu + * Copyright (C) 2008 Analog Devices, Inc + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Licensed under the GPL-2 or later. + */ + +#include +#include +#include +#include +#include + +#include "u_uac1_legacy.h" + +static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value); +static int generic_get_cmd(struct usb_audio_control *con, u8 cmd); + +/* + * DESCRIPTORS ... most are static, but strings and full + * configuration descriptors are built on demand. + */ + +/* + * We have two interfaces- AudioControl and AudioStreaming + * TODO: only supcard playback currently + */ +#define F_AUDIO_AC_INTERFACE 0 +#define F_AUDIO_AS_INTERFACE 1 +#define F_AUDIO_NUM_INTERFACES 1 + +/* B.3.1 Standard AC Interface Descriptor */ +static struct usb_interface_descriptor ac_interface_desc = { + .bLength = USB_DT_INTERFACE_SIZE, + .bDescriptorType = USB_DT_INTERFACE, + .bNumEndpoints = 0, + .bInterfaceClass = USB_CLASS_AUDIO, + .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, +}; + +/* + * The number of AudioStreaming and MIDIStreaming interfaces + * in the Audio Interface Collection + */ +DECLARE_UAC_AC_HEADER_DESCRIPTOR(1); + +#define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES) +/* 1 input terminal, 1 output terminal and 1 feature unit */ +#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH + UAC_DT_INPUT_TERMINAL_SIZE \ + + UAC_DT_OUTPUT_TERMINAL_SIZE + UAC_DT_FEATURE_UNIT_SIZE(0)) +/* B.3.2 Class-Specific AC Interface Descriptor */ +static struct uac1_ac_header_descriptor_1 ac_header_desc = { + .bLength = UAC_DT_AC_HEADER_LENGTH, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_HEADER, + .bcdADC = __constant_cpu_to_le16(0x0100), + .wTotalLength = __constant_cpu_to_le16(UAC_DT_TOTAL_LENGTH), + .bInCollection = F_AUDIO_NUM_INTERFACES, + .baInterfaceNr = { + /* Interface number of the first AudioStream interface */ + [0] = 1, + } +}; + +#define INPUT_TERMINAL_ID 1 +static struct uac_input_terminal_descriptor input_terminal_desc = { + .bLength = UAC_DT_INPUT_TERMINAL_SIZE, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_INPUT_TERMINAL, + .bTerminalID = INPUT_TERMINAL_ID, + .wTerminalType = UAC_TERMINAL_STREAMING, + .bAssocTerminal = 0, + .wChannelConfig = 0x3, +}; + +DECLARE_UAC_FEATURE_UNIT_DESCRIPTOR(0); + +#define FEATURE_UNIT_ID 2 +static struct uac_feature_unit_descriptor_0 feature_unit_desc = { + .bLength = UAC_DT_FEATURE_UNIT_SIZE(0), + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_FEATURE_UNIT, + .bUnitID = FEATURE_UNIT_ID, + .bSourceID = INPUT_TERMINAL_ID, + .bControlSize = 2, + .bmaControls[0] = (UAC_FU_MUTE | UAC_FU_VOLUME), +}; + +static struct usb_audio_control mute_control = { + .list = LIST_HEAD_INIT(mute_control.list), + .name = "Mute Control", + .type = UAC_FU_MUTE, + /* Todo: add real Mute control code */ + .set = generic_set_cmd, + .get = generic_get_cmd, +}; + +static struct usb_audio_control volume_control = { + .list = LIST_HEAD_INIT(volume_control.list), + .name = "Volume Control", + .type = UAC_FU_VOLUME, + /* Todo: add real Volume control code */ + .set = generic_set_cmd, + .get = generic_get_cmd, +}; + +static struct usb_audio_control_selector feature_unit = { + .list = LIST_HEAD_INIT(feature_unit.list), + .id = FEATURE_UNIT_ID, + .name = "Mute & Volume Control", + .type = UAC_FEATURE_UNIT, + .desc = (struct usb_descriptor_header *)&feature_unit_desc, +}; + +#define OUTPUT_TERMINAL_ID 3 +static struct uac1_output_terminal_descriptor output_terminal_desc = { + .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, + .bTerminalID = OUTPUT_TERMINAL_ID, + .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER, + .bAssocTerminal = FEATURE_UNIT_ID, + .bSourceID = FEATURE_UNIT_ID, +}; + +/* B.4.1 Standard AS Interface Descriptor */ +static struct usb_interface_descriptor as_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_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_header_desc = { + .bLength = UAC_DT_AS_HEADER_SIZE, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_AS_GENERAL, + .bTerminalLink = INPUT_TERMINAL_ID, + .bDelay = 1, + .wFormatTag = UAC_FORMAT_TYPE_I_PCM, +}; + +DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1); + +static struct uac_format_type_i_discrete_descriptor_1 as_type_i_desc = { + .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1), + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_FORMAT_TYPE, + .bFormatType = UAC_FORMAT_TYPE_I, + .bSubframeSize = 2, + .bBitResolution = 16, + .bSamFreqType = 1, +}; + +/* Standard ISO OUT Endpoint Descriptor */ +static struct usb_endpoint_descriptor as_out_ep_desc = { + .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bEndpointAddress = USB_DIR_OUT, + .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE + | USB_ENDPOINT_XFER_ISOC, + .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 = __constant_cpu_to_le16(1), +}; + +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 *)&input_terminal_desc, + (struct usb_descriptor_header *)&output_terminal_desc, + (struct usb_descriptor_header *)&feature_unit_desc, + + (struct usb_descriptor_header *)&as_interface_alt_0_desc, + (struct usb_descriptor_header *)&as_interface_alt_1_desc, + (struct usb_descriptor_header *)&as_header_desc, + + (struct usb_descriptor_header *)&as_type_i_desc, + + (struct usb_descriptor_header *)&as_out_ep_desc, + (struct usb_descriptor_header *)&as_iso_out_desc, + NULL, +}; + +enum { + STR_AC_IF, + STR_INPUT_TERMINAL, + STR_INPUT_TERMINAL_CH_NAMES, + STR_FEAT_DESC_0, + STR_OUTPUT_TERMINAL, + STR_AS_IF_ALT0, + STR_AS_IF_ALT1, +}; + +static struct usb_string strings_uac1[] = { + [STR_AC_IF].s = "AC Interface", + [STR_INPUT_TERMINAL].s = "Input terminal", + [STR_INPUT_TERMINAL_CH_NAMES].s = "Channels", + [STR_FEAT_DESC_0].s = "Volume control & mute", + [STR_OUTPUT_TERMINAL].s = "Output terminal", + [STR_AS_IF_ALT0].s = "AS Interface", + [STR_AS_IF_ALT1].s = "AS Interface", + { }, +}; + +static struct usb_gadget_strings str_uac1 = { + .language = 0x0409, /* en-us */ + .strings = strings_uac1, +}; + +static struct usb_gadget_strings *uac1_strings[] = { + &str_uac1, + NULL, +}; + +/* + * This function is an ALSA sound card following USB Audio Class Spec 1.0. + */ + +/*-------------------------------------------------------------------------*/ +struct f_audio_buf { + u8 *buf; + int actual; + struct list_head list; +}; + +static struct f_audio_buf *f_audio_buffer_alloc(int buf_size) +{ + struct f_audio_buf *copy_buf; + + copy_buf = kzalloc(sizeof *copy_buf, GFP_ATOMIC); + if (!copy_buf) + return ERR_PTR(-ENOMEM); + + copy_buf->buf = kzalloc(buf_size, GFP_ATOMIC); + if (!copy_buf->buf) { + kfree(copy_buf); + return ERR_PTR(-ENOMEM); + } + + return copy_buf; +} + +static void f_audio_buffer_free(struct f_audio_buf *audio_buf) +{ + kfree(audio_buf->buf); + kfree(audio_buf); +} +/*-------------------------------------------------------------------------*/ + +struct f_audio { + struct gaudio card; + + u8 ac_intf, ac_alt; + u8 as_intf, as_alt; + + /* endpoints handle full and/or high speeds */ + struct usb_ep *out_ep; + + spinlock_t lock; + struct f_audio_buf *copy_buf; + struct work_struct playback_work; + struct list_head play_queue; + + /* Control Set command */ + struct list_head cs; + u8 set_cmd; + struct usb_audio_control *set_con; +}; + +static inline struct f_audio *func_to_audio(struct usb_function *f) +{ + return container_of(f, struct f_audio, card.func); +} + +/*-------------------------------------------------------------------------*/ + +static void f_audio_playback_work(struct work_struct *data) +{ + struct f_audio *audio = container_of(data, struct f_audio, + playback_work); + struct f_audio_buf *play_buf; + + spin_lock_irq(&audio->lock); + if (list_empty(&audio->play_queue)) { + spin_unlock_irq(&audio->lock); + return; + } + play_buf = list_first_entry(&audio->play_queue, + struct f_audio_buf, list); + list_del(&play_buf->list); + spin_unlock_irq(&audio->lock); + + u_audio_playback(&audio->card, play_buf->buf, play_buf->actual); + f_audio_buffer_free(play_buf); +} + +static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req) +{ + struct f_audio *audio = req->context; + struct usb_composite_dev *cdev = audio->card.func.config->cdev; + struct f_audio_buf *copy_buf = audio->copy_buf; + struct f_uac1_legacy_opts *opts; + int audio_buf_size; + int err; + + opts = container_of(audio->card.func.fi, struct f_uac1_legacy_opts, + func_inst); + audio_buf_size = opts->audio_buf_size; + + if (!copy_buf) + return -EINVAL; + + /* Copy buffer is full, add it to the play_queue */ + if (audio_buf_size - copy_buf->actual < req->actual) { + list_add_tail(©_buf->list, &audio->play_queue); + schedule_work(&audio->playback_work); + copy_buf = f_audio_buffer_alloc(audio_buf_size); + if (IS_ERR(copy_buf)) + return -ENOMEM; + } + + memcpy(copy_buf->buf + copy_buf->actual, req->buf, req->actual); + copy_buf->actual += req->actual; + audio->copy_buf = copy_buf; + + err = usb_ep_queue(ep, req, GFP_ATOMIC); + if (err) + ERROR(cdev, "%s queue req: %d\n", ep->name, err); + + return 0; + +} + +static void f_audio_complete(struct usb_ep *ep, struct usb_request *req) +{ + struct f_audio *audio = req->context; + int status = req->status; + u32 data = 0; + struct usb_ep *out_ep = audio->out_ep; + + switch (status) { + + case 0: /* normal completion? */ + if (ep == out_ep) + f_audio_out_ep_complete(ep, req); + else if (audio->set_con) { + memcpy(&data, req->buf, req->length); + audio->set_con->set(audio->set_con, audio->set_cmd, + le16_to_cpu(data)); + audio->set_con = NULL; + } + break; + default: + break; + } +} + +static int audio_set_intf_req(struct usb_function *f, + const struct usb_ctrlrequest *ctrl) +{ + struct f_audio *audio = func_to_audio(f); + struct usb_composite_dev *cdev = f->config->cdev; + struct usb_request *req = cdev->req; + u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); + u16 len = le16_to_cpu(ctrl->wLength); + u16 w_value = le16_to_cpu(ctrl->wValue); + u8 con_sel = (w_value >> 8) & 0xFF; + u8 cmd = (ctrl->bRequest & 0x0F); + struct usb_audio_control_selector *cs; + struct usb_audio_control *con; + + DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", + ctrl->bRequest, w_value, len, id); + + list_for_each_entry(cs, &audio->cs, list) { + if (cs->id == id) { + list_for_each_entry(con, &cs->control, list) { + if (con->type == con_sel) { + audio->set_con = con; + break; + } + } + break; + } + } + + audio->set_cmd = cmd; + req->context = audio; + req->complete = f_audio_complete; + + return len; +} + +static int audio_get_intf_req(struct usb_function *f, + const struct usb_ctrlrequest *ctrl) +{ + struct f_audio *audio = func_to_audio(f); + struct usb_composite_dev *cdev = f->config->cdev; + struct usb_request *req = cdev->req; + int value = -EOPNOTSUPP; + u8 id = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); + u16 len = le16_to_cpu(ctrl->wLength); + u16 w_value = le16_to_cpu(ctrl->wValue); + u8 con_sel = (w_value >> 8) & 0xFF; + u8 cmd = (ctrl->bRequest & 0x0F); + struct usb_audio_control_selector *cs; + struct usb_audio_control *con; + + DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, entity %d\n", + ctrl->bRequest, w_value, len, id); + + list_for_each_entry(cs, &audio->cs, list) { + if (cs->id == id) { + list_for_each_entry(con, &cs->control, list) { + if (con->type == con_sel && con->get) { + value = con->get(con, cmd); + break; + } + } + break; + } + } + + req->context = audio; + req->complete = f_audio_complete; + len = min_t(size_t, sizeof(value), len); + memcpy(req->buf, &value, len); + + return len; +} + +static int audio_set_endpoint_req(struct usb_function *f, + const struct usb_ctrlrequest *ctrl) +{ + struct usb_composite_dev *cdev = f->config->cdev; + int value = -EOPNOTSUPP; + u16 ep = le16_to_cpu(ctrl->wIndex); + u16 len = le16_to_cpu(ctrl->wLength); + u16 w_value = le16_to_cpu(ctrl->wValue); + + DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", + ctrl->bRequest, w_value, len, ep); + + switch (ctrl->bRequest) { + case UAC_SET_CUR: + value = len; + break; + + case UAC_SET_MIN: + break; + + case UAC_SET_MAX: + break; + + case UAC_SET_RES: + break; + + case UAC_SET_MEM: + break; + + default: + break; + } + + return value; +} + +static int audio_get_endpoint_req(struct usb_function *f, + const struct usb_ctrlrequest *ctrl) +{ + struct usb_composite_dev *cdev = f->config->cdev; + int value = -EOPNOTSUPP; + u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); + u16 len = le16_to_cpu(ctrl->wLength); + u16 w_value = le16_to_cpu(ctrl->wValue); + + DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", + ctrl->bRequest, w_value, len, ep); + + switch (ctrl->bRequest) { + case UAC_GET_CUR: + case UAC_GET_MIN: + case UAC_GET_MAX: + case UAC_GET_RES: + value = len; + break; + case UAC_GET_MEM: + break; + default: + break; + } + + return value; +} + +static int +f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) +{ + struct usb_composite_dev *cdev = f->config->cdev; + struct usb_request *req = cdev->req; + int value = -EOPNOTSUPP; + u16 w_index = le16_to_cpu(ctrl->wIndex); + u16 w_value = le16_to_cpu(ctrl->wValue); + u16 w_length = le16_to_cpu(ctrl->wLength); + + /* composite driver infrastructure handles everything; interface + * activation uses set_alt(). + */ + switch (ctrl->bRequestType) { + case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE: + value = audio_set_intf_req(f, ctrl); + break; + + case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE: + value = audio_get_intf_req(f, ctrl); + break; + + case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: + value = audio_set_endpoint_req(f, ctrl); + break; + + case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: + value = audio_get_endpoint_req(f, ctrl); + break; + + default: + ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", + ctrl->bRequestType, ctrl->bRequest, + w_value, w_index, w_length); + } + + /* respond with data transfer or status phase? */ + if (value >= 0) { + DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n", + ctrl->bRequestType, ctrl->bRequest, + w_value, w_index, w_length); + req->zero = 0; + req->length = value; + value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); + if (value < 0) + ERROR(cdev, "audio response on err %d\n", value); + } + + /* device either stalls (value < 0) or reports success */ + return value; +} + +static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) +{ + struct f_audio *audio = func_to_audio(f); + struct usb_composite_dev *cdev = f->config->cdev; + struct usb_ep *out_ep = audio->out_ep; + struct usb_request *req; + struct f_uac1_legacy_opts *opts; + int req_buf_size, req_count, audio_buf_size; + int i = 0, err = 0; + + DBG(cdev, "intf %d, alt %d\n", intf, alt); + + opts = container_of(f->fi, struct f_uac1_legacy_opts, func_inst); + req_buf_size = opts->req_buf_size; + req_count = opts->req_count; + audio_buf_size = opts->audio_buf_size; + + /* No i/f has more than 2 alt settings */ + if (alt > 1) { + ERROR(cdev, "%s:%d Error!\n", __func__, __LINE__); + return -EINVAL; + } + + if (intf == audio->ac_intf) { + /* Control I/f has only 1 AltSetting - 0 */ + if (alt) { + ERROR(cdev, "%s:%d Error!\n", __func__, __LINE__); + return -EINVAL; + } + return 0; + } else if (intf == audio->as_intf) { + if (alt == 1) { + err = config_ep_by_speed(cdev->gadget, f, out_ep); + if (err) + return err; + + usb_ep_enable(out_ep); + audio->copy_buf = f_audio_buffer_alloc(audio_buf_size); + if (IS_ERR(audio->copy_buf)) + return -ENOMEM; + + /* + * allocate a bunch of read buffers + * and queue them all at once. + */ + for (i = 0; i < req_count && err == 0; i++) { + req = usb_ep_alloc_request(out_ep, GFP_ATOMIC); + if (req) { + req->buf = kzalloc(req_buf_size, + GFP_ATOMIC); + if (req->buf) { + req->length = req_buf_size; + req->context = audio; + req->complete = + f_audio_complete; + err = usb_ep_queue(out_ep, + req, GFP_ATOMIC); + if (err) + ERROR(cdev, + "%s queue req: %d\n", + out_ep->name, err); + } else + err = -ENOMEM; + } else + err = -ENOMEM; + } + + } else { + struct f_audio_buf *copy_buf = audio->copy_buf; + if (copy_buf) { + list_add_tail(©_buf->list, + &audio->play_queue); + schedule_work(&audio->playback_work); + } + } + audio->as_alt = alt; + } + + return err; +} + +static int f_audio_get_alt(struct usb_function *f, unsigned intf) +{ + struct f_audio *audio = func_to_audio(f); + struct usb_composite_dev *cdev = f->config->cdev; + + if (intf == audio->ac_intf) + return audio->ac_alt; + else if (intf == audio->as_intf) + return audio->as_alt; + else + ERROR(cdev, "%s:%d Invalid Interface %d!\n", + __func__, __LINE__, intf); + + return -EINVAL; +} + +static void f_audio_disable(struct usb_function *f) +{ + return; +} + +/*-------------------------------------------------------------------------*/ + +static void f_audio_build_desc(struct f_audio *audio) +{ + struct gaudio *card = &audio->card; + u8 *sam_freq; + int rate; + + /* Set channel numbers */ + input_terminal_desc.bNrChannels = u_audio_get_playback_channels(card); + as_type_i_desc.bNrChannels = u_audio_get_playback_channels(card); + + /* Set sample rates */ + rate = u_audio_get_playback_rate(card); + sam_freq = as_type_i_desc.tSamFreq[0]; + memcpy(sam_freq, &rate, 3); + + /* Todo: Set Sample bits and other parameters */ + + return; +} + +/* audio function driver setup/binding */ +static int +f_audio_bind(struct usb_configuration *c, struct usb_function *f) +{ + struct usb_composite_dev *cdev = c->cdev; + struct f_audio *audio = func_to_audio(f); + struct usb_string *us; + int status; + struct usb_ep *ep = NULL; + struct f_uac1_legacy_opts *audio_opts; + + audio_opts = container_of(f->fi, struct f_uac1_legacy_opts, func_inst); + audio->card.gadget = c->cdev->gadget; + /* set up ASLA audio devices */ + if (!audio_opts->bound) { + status = gaudio_setup(&audio->card); + if (status < 0) + return status; + audio_opts->bound = true; + } + us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1)); + if (IS_ERR(us)) + return PTR_ERR(us); + ac_interface_desc.iInterface = us[STR_AC_IF].id; + input_terminal_desc.iTerminal = us[STR_INPUT_TERMINAL].id; + input_terminal_desc.iChannelNames = us[STR_INPUT_TERMINAL_CH_NAMES].id; + feature_unit_desc.iFeature = us[STR_FEAT_DESC_0].id; + output_terminal_desc.iTerminal = us[STR_OUTPUT_TERMINAL].id; + as_interface_alt_0_desc.iInterface = us[STR_AS_IF_ALT0].id; + as_interface_alt_1_desc.iInterface = us[STR_AS_IF_ALT1].id; + + + f_audio_build_desc(audio); + + /* allocate instance-specific interface IDs, and patch descriptors */ + status = usb_interface_id(c, f); + if (status < 0) + goto fail; + ac_interface_desc.bInterfaceNumber = status; + audio->ac_intf = status; + audio->ac_alt = 0; + + status = usb_interface_id(c, f); + if (status < 0) + goto fail; + as_interface_alt_0_desc.bInterfaceNumber = status; + as_interface_alt_1_desc.bInterfaceNumber = status; + audio->as_intf = status; + audio->as_alt = 0; + + status = -ENODEV; + + /* allocate instance-specific endpoints */ + ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc); + if (!ep) + goto fail; + audio->out_ep = ep; + audio->out_ep->desc = &as_out_ep_desc; + + status = -ENOMEM; + + /* copy descriptors, and track endpoint copies */ + status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL, + NULL); + if (status) + goto fail; + return 0; + +fail: + gaudio_cleanup(&audio->card); + return status; +} + +/*-------------------------------------------------------------------------*/ + +static int generic_set_cmd(struct usb_audio_control *con, u8 cmd, int value) +{ + con->data[cmd] = value; + + return 0; +} + +static int generic_get_cmd(struct usb_audio_control *con, u8 cmd) +{ + return con->data[cmd]; +} + +/* Todo: add more control selecotor dynamically */ +static int control_selector_init(struct f_audio *audio) +{ + INIT_LIST_HEAD(&audio->cs); + list_add(&feature_unit.list, &audio->cs); + + INIT_LIST_HEAD(&feature_unit.control); + list_add(&mute_control.list, &feature_unit.control); + list_add(&volume_control.list, &feature_unit.control); + + volume_control.data[UAC__CUR] = 0xffc0; + volume_control.data[UAC__MIN] = 0xe3a0; + volume_control.data[UAC__MAX] = 0xfff0; + volume_control.data[UAC__RES] = 0x0030; + + return 0; +} + +static inline +struct f_uac1_legacy_opts *to_f_uac1_opts(struct config_item *item) +{ + return container_of(to_config_group(item), struct f_uac1_legacy_opts, + func_inst.group); +} + +static void f_uac1_attr_release(struct config_item *item) +{ + struct f_uac1_legacy_opts *opts = to_f_uac1_opts(item); + + usb_put_function_instance(&opts->func_inst); +} + +static struct configfs_item_operations f_uac1_item_ops = { + .release = f_uac1_attr_release, +}; + +#define UAC1_INT_ATTRIBUTE(name) \ +static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \ + char *page) \ +{ \ + struct f_uac1_legacy_opts *opts = to_f_uac1_opts(item); \ + int result; \ + \ + mutex_lock(&opts->lock); \ + result = sprintf(page, "%u\n", opts->name); \ + mutex_unlock(&opts->lock); \ + \ + return result; \ +} \ + \ +static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ + const char *page, size_t len) \ +{ \ + struct f_uac1_legacy_opts *opts = to_f_uac1_opts(item); \ + int ret; \ + u32 num; \ + \ + mutex_lock(&opts->lock); \ + if (opts->refcnt) { \ + ret = -EBUSY; \ + goto end; \ + } \ + \ + ret = kstrtou32(page, 0, &num); \ + if (ret) \ + goto end; \ + \ + opts->name = num; \ + ret = len; \ + \ +end: \ + mutex_unlock(&opts->lock); \ + return ret; \ +} \ + \ +CONFIGFS_ATTR(f_uac1_opts_, name) + +UAC1_INT_ATTRIBUTE(req_buf_size); +UAC1_INT_ATTRIBUTE(req_count); +UAC1_INT_ATTRIBUTE(audio_buf_size); + +#define UAC1_STR_ATTRIBUTE(name) \ +static ssize_t f_uac1_opts_##name##_show(struct config_item *item, \ + char *page) \ +{ \ + struct f_uac1_legacy_opts *opts = to_f_uac1_opts(item); \ + int result; \ + \ + mutex_lock(&opts->lock); \ + result = sprintf(page, "%s\n", opts->name); \ + mutex_unlock(&opts->lock); \ + \ + return result; \ +} \ + \ +static ssize_t f_uac1_opts_##name##_store(struct config_item *item, \ + const char *page, size_t len) \ +{ \ + struct f_uac1_legacy_opts *opts = to_f_uac1_opts(item); \ + int ret = -EBUSY; \ + char *tmp; \ + \ + mutex_lock(&opts->lock); \ + if (opts->refcnt) \ + goto end; \ + \ + tmp = kstrndup(page, len, GFP_KERNEL); \ + if (tmp) { \ + ret = -ENOMEM; \ + goto end; \ + } \ + if (opts->name##_alloc) \ + kfree(opts->name); \ + opts->name##_alloc = true; \ + opts->name = tmp; \ + ret = len; \ + \ +end: \ + mutex_unlock(&opts->lock); \ + return ret; \ +} \ + \ +CONFIGFS_ATTR(f_uac1_opts_, name) + +UAC1_STR_ATTRIBUTE(fn_play); +UAC1_STR_ATTRIBUTE(fn_cap); +UAC1_STR_ATTRIBUTE(fn_cntl); + +static struct configfs_attribute *f_uac1_attrs[] = { + &f_uac1_opts_attr_req_buf_size, + &f_uac1_opts_attr_req_count, + &f_uac1_opts_attr_audio_buf_size, + &f_uac1_opts_attr_fn_play, + &f_uac1_opts_attr_fn_cap, + &f_uac1_opts_attr_fn_cntl, + NULL, +}; + +static struct config_item_type f_uac1_func_type = { + .ct_item_ops = &f_uac1_item_ops, + .ct_attrs = f_uac1_attrs, + .ct_owner = THIS_MODULE, +}; + +static void f_audio_free_inst(struct usb_function_instance *f) +{ + struct f_uac1_legacy_opts *opts; + + opts = container_of(f, struct f_uac1_legacy_opts, func_inst); + if (opts->fn_play_alloc) + kfree(opts->fn_play); + if (opts->fn_cap_alloc) + kfree(opts->fn_cap); + if (opts->fn_cntl_alloc) + kfree(opts->fn_cntl); + kfree(opts); +} + +static struct usb_function_instance *f_audio_alloc_inst(void) +{ + struct f_uac1_legacy_opts *opts; + + opts = kzalloc(sizeof(*opts), GFP_KERNEL); + if (!opts) + return ERR_PTR(-ENOMEM); + + mutex_init(&opts->lock); + opts->func_inst.free_func_inst = f_audio_free_inst; + + config_group_init_type_name(&opts->func_inst.group, "", + &f_uac1_func_type); + + opts->req_buf_size = UAC1_OUT_EP_MAX_PACKET_SIZE; + opts->req_count = UAC1_REQ_COUNT; + opts->audio_buf_size = UAC1_AUDIO_BUF_SIZE; + opts->fn_play = FILE_PCM_PLAYBACK; + opts->fn_cap = FILE_PCM_CAPTURE; + opts->fn_cntl = FILE_CONTROL; + return &opts->func_inst; +} + +static void f_audio_free(struct usb_function *f) +{ + struct f_audio *audio = func_to_audio(f); + struct f_uac1_legacy_opts *opts; + + gaudio_cleanup(&audio->card); + opts = container_of(f->fi, struct f_uac1_legacy_opts, func_inst); + kfree(audio); + mutex_lock(&opts->lock); + --opts->refcnt; + mutex_unlock(&opts->lock); +} + +static void f_audio_unbind(struct usb_configuration *c, struct usb_function *f) +{ + usb_free_all_descriptors(f); +} + +static struct usb_function *f_audio_alloc(struct usb_function_instance *fi) +{ + struct f_audio *audio; + struct f_uac1_legacy_opts *opts; + + /* allocate and initialize one new instance */ + audio = kzalloc(sizeof(*audio), GFP_KERNEL); + if (!audio) + return ERR_PTR(-ENOMEM); + + audio->card.func.name = "g_audio"; + + opts = container_of(fi, struct f_uac1_legacy_opts, func_inst); + mutex_lock(&opts->lock); + ++opts->refcnt; + mutex_unlock(&opts->lock); + INIT_LIST_HEAD(&audio->play_queue); + spin_lock_init(&audio->lock); + + audio->card.func.bind = f_audio_bind; + audio->card.func.unbind = f_audio_unbind; + audio->card.func.set_alt = f_audio_set_alt; + audio->card.func.get_alt = f_audio_get_alt; + audio->card.func.setup = f_audio_setup; + audio->card.func.disable = f_audio_disable; + audio->card.func.free_func = f_audio_free; + + control_selector_init(audio); + + INIT_WORK(&audio->playback_work, f_audio_playback_work); + + return &audio->card.func; +} + +DECLARE_USB_FUNCTION_INIT(uac1_legacy, f_audio_alloc_inst, f_audio_alloc); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Bryan Wu"); diff --git a/drivers/usb/gadget/function/u_uac1.c b/drivers/usb/gadget/function/u_uac1.c deleted file mode 100644 index c78c84138a28..000000000000 --- a/drivers/usb/gadget/function/u_uac1.c +++ /dev/null @@ -1,314 +0,0 @@ -/* - * u_uac1.c -- ALSA audio utilities for Gadget stack - * - * Copyright (C) 2008 Bryan Wu - * Copyright (C) 2008 Analog Devices, Inc - * - * Enter bugs at http://blackfin.uclinux.org/ - * - * Licensed under the GPL-2 or later. - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -#include "u_uac1.h" - -/* - * This component encapsulates the ALSA devices for USB audio gadget - */ - -/*-------------------------------------------------------------------------*/ - -/** - * Some ALSA internal helper functions - */ -static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) -{ - struct snd_interval t; - t.empty = 0; - t.min = t.max = val; - t.openmin = t.openmax = 0; - t.integer = 1; - return snd_interval_refine(i, &t); -} - -static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, - snd_pcm_hw_param_t var, unsigned int val, - int dir) -{ - int changed; - if (hw_is_mask(var)) { - struct snd_mask *m = hw_param_mask(params, var); - if (val == 0 && dir < 0) { - changed = -EINVAL; - snd_mask_none(m); - } else { - if (dir > 0) - val++; - else if (dir < 0) - val--; - changed = snd_mask_refine_set( - hw_param_mask(params, var), val); - } - } else if (hw_is_interval(var)) { - struct snd_interval *i = hw_param_interval(params, var); - if (val == 0 && dir < 0) { - changed = -EINVAL; - snd_interval_none(i); - } else if (dir == 0) - changed = snd_interval_refine_set(i, val); - else { - struct snd_interval t; - t.openmin = 1; - t.openmax = 1; - t.empty = 0; - t.integer = 0; - if (dir < 0) { - t.min = val - 1; - t.max = val; - } else { - t.min = val; - t.max = val+1; - } - changed = snd_interval_refine(i, &t); - } - } else - return -EINVAL; - if (changed) { - params->cmask |= 1 << var; - params->rmask |= 1 << var; - } - return changed; -} -/*-------------------------------------------------------------------------*/ - -/** - * Set default hardware params - */ -static int playback_default_hw_params(struct gaudio_snd_dev *snd) -{ - struct snd_pcm_substream *substream = snd->substream; - struct snd_pcm_hw_params *params; - snd_pcm_sframes_t result; - - /* - * SNDRV_PCM_ACCESS_RW_INTERLEAVED, - * SNDRV_PCM_FORMAT_S16_LE - * CHANNELS: 2 - * RATE: 48000 - */ - snd->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; - snd->format = SNDRV_PCM_FORMAT_S16_LE; - snd->channels = 2; - snd->rate = 48000; - - params = kzalloc(sizeof(*params), GFP_KERNEL); - if (!params) - return -ENOMEM; - - _snd_pcm_hw_params_any(params); - _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, - snd->access, 0); - _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, - snd->format, 0); - _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, - snd->channels, 0); - _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, - snd->rate, 0); - - snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); - snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, params); - - result = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); - if (result < 0) { - ERROR(snd->card, - "Preparing sound card failed: %d\n", (int)result); - kfree(params); - return result; - } - - /* Store the hardware parameters */ - snd->access = params_access(params); - snd->format = params_format(params); - snd->channels = params_channels(params); - snd->rate = params_rate(params); - - kfree(params); - - INFO(snd->card, - "Hardware params: access %x, format %x, channels %d, rate %d\n", - snd->access, snd->format, snd->channels, snd->rate); - - return 0; -} - -/** - * Playback audio buffer data by ALSA PCM device - */ -size_t u_audio_playback(struct gaudio *card, void *buf, size_t count) -{ - struct gaudio_snd_dev *snd = &card->playback; - struct snd_pcm_substream *substream = snd->substream; - struct snd_pcm_runtime *runtime = substream->runtime; - mm_segment_t old_fs; - ssize_t result; - snd_pcm_sframes_t frames; - -try_again: - if (runtime->status->state == SNDRV_PCM_STATE_XRUN || - runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { - result = snd_pcm_kernel_ioctl(substream, - SNDRV_PCM_IOCTL_PREPARE, NULL); - if (result < 0) { - ERROR(card, "Preparing sound card failed: %d\n", - (int)result); - return result; - } - } - - frames = bytes_to_frames(runtime, count); - old_fs = get_fs(); - set_fs(KERNEL_DS); - result = snd_pcm_lib_write(snd->substream, (void __user *)buf, frames); - if (result != frames) { - ERROR(card, "Playback error: %d\n", (int)result); - set_fs(old_fs); - goto try_again; - } - set_fs(old_fs); - - return 0; -} - -int u_audio_get_playback_channels(struct gaudio *card) -{ - return card->playback.channels; -} - -int u_audio_get_playback_rate(struct gaudio *card) -{ - return card->playback.rate; -} - -/** - * Open ALSA PCM and control device files - * Initial the PCM or control device - */ -static int gaudio_open_snd_dev(struct gaudio *card) -{ - struct snd_pcm_file *pcm_file; - struct gaudio_snd_dev *snd; - struct f_uac1_opts *opts; - char *fn_play, *fn_cap, *fn_cntl; - - opts = container_of(card->func.fi, struct f_uac1_opts, func_inst); - fn_play = opts->fn_play; - fn_cap = opts->fn_cap; - fn_cntl = opts->fn_cntl; - - /* Open control device */ - snd = &card->control; - snd->filp = filp_open(fn_cntl, O_RDWR, 0); - if (IS_ERR(snd->filp)) { - int ret = PTR_ERR(snd->filp); - ERROR(card, "unable to open sound control device file: %s\n", - fn_cntl); - snd->filp = NULL; - return ret; - } - snd->card = card; - - /* Open PCM playback device and setup substream */ - snd = &card->playback; - snd->filp = filp_open(fn_play, O_WRONLY, 0); - if (IS_ERR(snd->filp)) { - int ret = PTR_ERR(snd->filp); - - ERROR(card, "No such PCM playback device: %s\n", fn_play); - snd->filp = NULL; - return ret; - } - pcm_file = snd->filp->private_data; - snd->substream = pcm_file->substream; - snd->card = card; - playback_default_hw_params(snd); - - /* Open PCM capture device and setup substream */ - snd = &card->capture; - snd->filp = filp_open(fn_cap, O_RDONLY, 0); - if (IS_ERR(snd->filp)) { - ERROR(card, "No such PCM capture device: %s\n", fn_cap); - snd->substream = NULL; - snd->card = NULL; - snd->filp = NULL; - } else { - pcm_file = snd->filp->private_data; - snd->substream = pcm_file->substream; - snd->card = card; - } - - return 0; -} - -/** - * Close ALSA PCM and control device files - */ -static int gaudio_close_snd_dev(struct gaudio *gau) -{ - struct gaudio_snd_dev *snd; - - /* Close control device */ - snd = &gau->control; - if (snd->filp) - filp_close(snd->filp, NULL); - - /* Close PCM playback device and setup substream */ - snd = &gau->playback; - if (snd->filp) - filp_close(snd->filp, NULL); - - /* Close PCM capture device and setup substream */ - snd = &gau->capture; - if (snd->filp) - filp_close(snd->filp, NULL); - - return 0; -} - -/** - * gaudio_setup - setup ALSA interface and preparing for USB transfer - * - * This sets up PCM, mixer or MIDI ALSA devices fore USB gadget using. - * - * Returns negative errno, or zero on success - */ -int gaudio_setup(struct gaudio *card) -{ - int ret; - - ret = gaudio_open_snd_dev(card); - if (ret) - ERROR(card, "we need at least one control device\n"); - - return ret; - -} - -/** - * gaudio_cleanup - remove ALSA device interface - * - * This is called to free all resources allocated by @gaudio_setup(). - */ -void gaudio_cleanup(struct gaudio *the_card) -{ - if (the_card) - gaudio_close_snd_dev(the_card); -} - diff --git a/drivers/usb/gadget/function/u_uac1.h b/drivers/usb/gadget/function/u_uac1.h deleted file mode 100644 index 5c2ac8e8456d..000000000000 --- a/drivers/usb/gadget/function/u_uac1.h +++ /dev/null @@ -1,82 +0,0 @@ -/* - * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities - * - * Copyright (C) 2008 Bryan Wu - * Copyright (C) 2008 Analog Devices, Inc - * - * Enter bugs at http://blackfin.uclinux.org/ - * - * Licensed under the GPL-2 or later. - */ - -#ifndef __U_AUDIO_H -#define __U_AUDIO_H - -#include -#include -#include -#include - -#include -#include -#include - -#define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p" -#define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c" -#define FILE_CONTROL "/dev/snd/controlC0" - -#define UAC1_OUT_EP_MAX_PACKET_SIZE 200 -#define UAC1_REQ_COUNT 256 -#define UAC1_AUDIO_BUF_SIZE 48000 - -/* - * This represents the USB side of an audio card device, managed by a USB - * function which provides control and stream interfaces. - */ - -struct gaudio_snd_dev { - struct gaudio *card; - struct file *filp; - struct snd_pcm_substream *substream; - int access; - int format; - int channels; - int rate; -}; - -struct gaudio { - struct usb_function func; - struct usb_gadget *gadget; - - /* ALSA sound device interfaces */ - struct gaudio_snd_dev control; - struct gaudio_snd_dev playback; - struct gaudio_snd_dev capture; - - /* TODO */ -}; - -struct f_uac1_opts { - struct usb_function_instance func_inst; - int req_buf_size; - int req_count; - int audio_buf_size; - char *fn_play; - char *fn_cap; - char *fn_cntl; - unsigned bound:1; - unsigned fn_play_alloc:1; - unsigned fn_cap_alloc:1; - unsigned fn_cntl_alloc:1; - struct mutex lock; - int refcnt; -}; - -int gaudio_setup(struct gaudio *card); -void gaudio_cleanup(struct gaudio *the_card); - -size_t u_audio_playback(struct gaudio *card, void *buf, size_t count); -int u_audio_get_playback_channels(struct gaudio *card); -int u_audio_get_playback_rate(struct gaudio *card); - -#endif /* __U_AUDIO_H */ diff --git a/drivers/usb/gadget/function/u_uac1_legacy.c b/drivers/usb/gadget/function/u_uac1_legacy.c new file mode 100644 index 000000000000..8aa76b4dc117 --- /dev/null +++ b/drivers/usb/gadget/function/u_uac1_legacy.c @@ -0,0 +1,315 @@ +/* + * u_uac1.c -- ALSA audio utilities for Gadget stack + * + * Copyright (C) 2008 Bryan Wu + * Copyright (C) 2008 Analog Devices, Inc + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Licensed under the GPL-2 or later. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "u_uac1_legacy.h" + +/* + * This component encapsulates the ALSA devices for USB audio gadget + */ + +/*-------------------------------------------------------------------------*/ + +/** + * Some ALSA internal helper functions + */ +static int snd_interval_refine_set(struct snd_interval *i, unsigned int val) +{ + struct snd_interval t; + t.empty = 0; + t.min = t.max = val; + t.openmin = t.openmax = 0; + t.integer = 1; + return snd_interval_refine(i, &t); +} + +static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params, + snd_pcm_hw_param_t var, unsigned int val, + int dir) +{ + int changed; + if (hw_is_mask(var)) { + struct snd_mask *m = hw_param_mask(params, var); + if (val == 0 && dir < 0) { + changed = -EINVAL; + snd_mask_none(m); + } else { + if (dir > 0) + val++; + else if (dir < 0) + val--; + changed = snd_mask_refine_set( + hw_param_mask(params, var), val); + } + } else if (hw_is_interval(var)) { + struct snd_interval *i = hw_param_interval(params, var); + if (val == 0 && dir < 0) { + changed = -EINVAL; + snd_interval_none(i); + } else if (dir == 0) + changed = snd_interval_refine_set(i, val); + else { + struct snd_interval t; + t.openmin = 1; + t.openmax = 1; + t.empty = 0; + t.integer = 0; + if (dir < 0) { + t.min = val - 1; + t.max = val; + } else { + t.min = val; + t.max = val+1; + } + changed = snd_interval_refine(i, &t); + } + } else + return -EINVAL; + if (changed) { + params->cmask |= 1 << var; + params->rmask |= 1 << var; + } + return changed; +} +/*-------------------------------------------------------------------------*/ + +/** + * Set default hardware params + */ +static int playback_default_hw_params(struct gaudio_snd_dev *snd) +{ + struct snd_pcm_substream *substream = snd->substream; + struct snd_pcm_hw_params *params; + snd_pcm_sframes_t result; + + /* + * SNDRV_PCM_ACCESS_RW_INTERLEAVED, + * SNDRV_PCM_FORMAT_S16_LE + * CHANNELS: 2 + * RATE: 48000 + */ + snd->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED; + snd->format = SNDRV_PCM_FORMAT_S16_LE; + snd->channels = 2; + snd->rate = 48000; + + params = kzalloc(sizeof(*params), GFP_KERNEL); + if (!params) + return -ENOMEM; + + _snd_pcm_hw_params_any(params); + _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, + snd->access, 0); + _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, + snd->format, 0); + _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, + snd->channels, 0); + _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, + snd->rate, 0); + + snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); + snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, params); + + result = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); + if (result < 0) { + ERROR(snd->card, + "Preparing sound card failed: %d\n", (int)result); + kfree(params); + return result; + } + + /* Store the hardware parameters */ + snd->access = params_access(params); + snd->format = params_format(params); + snd->channels = params_channels(params); + snd->rate = params_rate(params); + + kfree(params); + + INFO(snd->card, + "Hardware params: access %x, format %x, channels %d, rate %d\n", + snd->access, snd->format, snd->channels, snd->rate); + + return 0; +} + +/** + * Playback audio buffer data by ALSA PCM device + */ +size_t u_audio_playback(struct gaudio *card, void *buf, size_t count) +{ + struct gaudio_snd_dev *snd = &card->playback; + struct snd_pcm_substream *substream = snd->substream; + struct snd_pcm_runtime *runtime = substream->runtime; + mm_segment_t old_fs; + ssize_t result; + snd_pcm_sframes_t frames; + +try_again: + if (runtime->status->state == SNDRV_PCM_STATE_XRUN || + runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { + result = snd_pcm_kernel_ioctl(substream, + SNDRV_PCM_IOCTL_PREPARE, NULL); + if (result < 0) { + ERROR(card, "Preparing sound card failed: %d\n", + (int)result); + return result; + } + } + + frames = bytes_to_frames(runtime, count); + old_fs = get_fs(); + set_fs(KERNEL_DS); + result = snd_pcm_lib_write(snd->substream, (void __user *)buf, frames); + if (result != frames) { + ERROR(card, "Playback error: %d\n", (int)result); + set_fs(old_fs); + goto try_again; + } + set_fs(old_fs); + + return 0; +} + +int u_audio_get_playback_channels(struct gaudio *card) +{ + return card->playback.channels; +} + +int u_audio_get_playback_rate(struct gaudio *card) +{ + return card->playback.rate; +} + +/** + * Open ALSA PCM and control device files + * Initial the PCM or control device + */ +static int gaudio_open_snd_dev(struct gaudio *card) +{ + struct snd_pcm_file *pcm_file; + struct gaudio_snd_dev *snd; + struct f_uac1_legacy_opts *opts; + char *fn_play, *fn_cap, *fn_cntl; + + opts = container_of(card->func.fi, struct f_uac1_legacy_opts, + func_inst); + fn_play = opts->fn_play; + fn_cap = opts->fn_cap; + fn_cntl = opts->fn_cntl; + + /* Open control device */ + snd = &card->control; + snd->filp = filp_open(fn_cntl, O_RDWR, 0); + if (IS_ERR(snd->filp)) { + int ret = PTR_ERR(snd->filp); + ERROR(card, "unable to open sound control device file: %s\n", + fn_cntl); + snd->filp = NULL; + return ret; + } + snd->card = card; + + /* Open PCM playback device and setup substream */ + snd = &card->playback; + snd->filp = filp_open(fn_play, O_WRONLY, 0); + if (IS_ERR(snd->filp)) { + int ret = PTR_ERR(snd->filp); + + ERROR(card, "No such PCM playback device: %s\n", fn_play); + snd->filp = NULL; + return ret; + } + pcm_file = snd->filp->private_data; + snd->substream = pcm_file->substream; + snd->card = card; + playback_default_hw_params(snd); + + /* Open PCM capture device and setup substream */ + snd = &card->capture; + snd->filp = filp_open(fn_cap, O_RDONLY, 0); + if (IS_ERR(snd->filp)) { + ERROR(card, "No such PCM capture device: %s\n", fn_cap); + snd->substream = NULL; + snd->card = NULL; + snd->filp = NULL; + } else { + pcm_file = snd->filp->private_data; + snd->substream = pcm_file->substream; + snd->card = card; + } + + return 0; +} + +/** + * Close ALSA PCM and control device files + */ +static int gaudio_close_snd_dev(struct gaudio *gau) +{ + struct gaudio_snd_dev *snd; + + /* Close control device */ + snd = &gau->control; + if (snd->filp) + filp_close(snd->filp, NULL); + + /* Close PCM playback device and setup substream */ + snd = &gau->playback; + if (snd->filp) + filp_close(snd->filp, NULL); + + /* Close PCM capture device and setup substream */ + snd = &gau->capture; + if (snd->filp) + filp_close(snd->filp, NULL); + + return 0; +} + +/** + * gaudio_setup - setup ALSA interface and preparing for USB transfer + * + * This sets up PCM, mixer or MIDI ALSA devices fore USB gadget using. + * + * Returns negative errno, or zero on success + */ +int gaudio_setup(struct gaudio *card) +{ + int ret; + + ret = gaudio_open_snd_dev(card); + if (ret) + ERROR(card, "we need at least one control device\n"); + + return ret; + +} + +/** + * gaudio_cleanup - remove ALSA device interface + * + * This is called to free all resources allocated by @gaudio_setup(). + */ +void gaudio_cleanup(struct gaudio *the_card) +{ + if (the_card) + gaudio_close_snd_dev(the_card); +} + diff --git a/drivers/usb/gadget/function/u_uac1_legacy.h b/drivers/usb/gadget/function/u_uac1_legacy.h new file mode 100644 index 000000000000..d715b1af56a4 --- /dev/null +++ b/drivers/usb/gadget/function/u_uac1_legacy.h @@ -0,0 +1,82 @@ +/* + * u_uac1.h -- interface to USB gadget "ALSA AUDIO" utilities + * + * Copyright (C) 2008 Bryan Wu + * Copyright (C) 2008 Analog Devices, Inc + * + * Enter bugs at http://blackfin.uclinux.org/ + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __U_UAC1_LEGACY_H +#define __U_UAC1_LEGACY_H + +#include +#include +#include +#include + +#include +#include +#include + +#define FILE_PCM_PLAYBACK "/dev/snd/pcmC0D0p" +#define FILE_PCM_CAPTURE "/dev/snd/pcmC0D0c" +#define FILE_CONTROL "/dev/snd/controlC0" + +#define UAC1_OUT_EP_MAX_PACKET_SIZE 200 +#define UAC1_REQ_COUNT 256 +#define UAC1_AUDIO_BUF_SIZE 48000 + +/* + * This represents the USB side of an audio card device, managed by a USB + * function which provides control and stream interfaces. + */ + +struct gaudio_snd_dev { + struct gaudio *card; + struct file *filp; + struct snd_pcm_substream *substream; + int access; + int format; + int channels; + int rate; +}; + +struct gaudio { + struct usb_function func; + struct usb_gadget *gadget; + + /* ALSA sound device interfaces */ + struct gaudio_snd_dev control; + struct gaudio_snd_dev playback; + struct gaudio_snd_dev capture; + + /* TODO */ +}; + +struct f_uac1_legacy_opts { + struct usb_function_instance func_inst; + int req_buf_size; + int req_count; + int audio_buf_size; + char *fn_play; + char *fn_cap; + char *fn_cntl; + unsigned bound:1; + unsigned fn_play_alloc:1; + unsigned fn_cap_alloc:1; + unsigned fn_cntl_alloc:1; + struct mutex lock; + int refcnt; +}; + +int gaudio_setup(struct gaudio *card); +void gaudio_cleanup(struct gaudio *the_card); + +size_t u_audio_playback(struct gaudio *card, void *buf, size_t count); +int u_audio_get_playback_channels(struct gaudio *card); +int u_audio_get_playback_rate(struct gaudio *card); + +#endif /* __U_UAC1_LEGACY_H */ diff --git a/drivers/usb/gadget/legacy/Kconfig b/drivers/usb/gadget/legacy/Kconfig index 5344064f5721..87bacb638a9c 100644 --- a/drivers/usb/gadget/legacy/Kconfig +++ b/drivers/usb/gadget/legacy/Kconfig @@ -54,8 +54,8 @@ config USB_AUDIO depends on SND select USB_LIBCOMPOSITE select SND_PCM - select USB_F_UAC1 if GADGET_UAC1 - select USB_F_UAC2 if !GADGET_UAC1 + select USB_F_UAC1_LEGACY if GADGET_UAC1_LEGACY + select USB_F_UAC2 if !GADGET_UAC1_LEGACY select USB_U_AUDIO if USB_F_UAC2 help This Gadget Audio driver is compatible with USB Audio Class @@ -73,7 +73,7 @@ config USB_AUDIO Say "y" to link the driver statically, or "m" to build a dynamically linked module called "g_audio". -config GADGET_UAC1 +config GADGET_UAC1_LEGACY bool "UAC 1.0 (Legacy)" depends on USB_AUDIO help diff --git a/drivers/usb/gadget/legacy/audio.c b/drivers/usb/gadget/legacy/audio.c index 8a39f42a4d56..bf5592a5b9e9 100644 --- a/drivers/usb/gadget/legacy/audio.c +++ b/drivers/usb/gadget/legacy/audio.c @@ -20,7 +20,7 @@ USB_GADGET_COMPOSITE_OPTIONS(); -#ifndef CONFIG_GADGET_UAC1 +#ifndef CONFIG_GADGET_UAC1_LEGACY #include "u_uac2.h" /* Playback(USB-IN) Default Stereo - Fl/Fr */ @@ -53,7 +53,7 @@ static int c_ssize = UAC2_DEF_CSSIZE; module_param(c_ssize, uint, S_IRUGO); MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)"); #else -#include "u_uac1.h" +#include "u_uac1_legacy.h" static char *fn_play = FILE_PCM_PLAYBACK; module_param(fn_play, charp, S_IRUGO); @@ -99,7 +99,7 @@ static struct usb_gadget_strings *audio_strings[] = { NULL, }; -#ifndef CONFIG_GADGET_UAC1 +#ifndef CONFIG_GADGET_UAC1_LEGACY static struct usb_function_instance *fi_uac2; static struct usb_function *f_uac2; #else @@ -125,7 +125,7 @@ static struct usb_device_descriptor device_desc = { /* .bcdUSB = DYNAMIC */ -#ifdef CONFIG_GADGET_UAC1 +#ifdef CONFIG_GADGET_UAC1_LEGACY .bDeviceClass = USB_CLASS_PER_INTERFACE, .bDeviceSubClass = 0, .bDeviceProtocol = 0, @@ -164,7 +164,7 @@ static int audio_do_config(struct usb_configuration *c) c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; } -#ifdef CONFIG_GADGET_UAC1 +#ifdef CONFIG_GADGET_UAC1_LEGACY f_uac1 = usb_get_function(fi_uac1); if (IS_ERR(f_uac1)) { status = PTR_ERR(f_uac1); @@ -204,24 +204,24 @@ static struct usb_configuration audio_config_driver = { static int audio_bind(struct usb_composite_dev *cdev) { -#ifndef CONFIG_GADGET_UAC1 +#ifndef CONFIG_GADGET_UAC1_LEGACY struct f_uac2_opts *uac2_opts; #else - struct f_uac1_opts *uac1_opts; + struct f_uac1_legacy_opts *uac1_opts; #endif int status; -#ifndef CONFIG_GADGET_UAC1 +#ifndef CONFIG_GADGET_UAC1_LEGACY fi_uac2 = usb_get_function_instance("uac2"); if (IS_ERR(fi_uac2)) return PTR_ERR(fi_uac2); #else - fi_uac1 = usb_get_function_instance("uac1"); + fi_uac1 = usb_get_function_instance("uac1_legacy"); if (IS_ERR(fi_uac1)) return PTR_ERR(fi_uac1); #endif -#ifndef CONFIG_GADGET_UAC1 +#ifndef CONFIG_GADGET_UAC1_LEGACY uac2_opts = container_of(fi_uac2, struct f_uac2_opts, func_inst); uac2_opts->p_chmask = p_chmask; uac2_opts->p_srate = p_srate; @@ -231,7 +231,7 @@ static int audio_bind(struct usb_composite_dev *cdev) uac2_opts->c_ssize = c_ssize; uac2_opts->req_number = UAC2_DEF_REQ_NUM; #else - uac1_opts = container_of(fi_uac1, struct f_uac1_opts, func_inst); + uac1_opts = container_of(fi_uac1, struct f_uac1_legacy_opts, func_inst); uac1_opts->fn_play = fn_play; uac1_opts->fn_cap = fn_cap; uac1_opts->fn_cntl = fn_cntl; @@ -269,7 +269,7 @@ fail_otg_desc: kfree(otg_desc[0]); otg_desc[0] = NULL; fail: -#ifndef CONFIG_GADGET_UAC1 +#ifndef CONFIG_GADGET_UAC1_LEGACY usb_put_function_instance(fi_uac2); #else usb_put_function_instance(fi_uac1); @@ -279,7 +279,7 @@ fail: static int audio_unbind(struct usb_composite_dev *cdev) { -#ifdef CONFIG_GADGET_UAC1 +#ifdef CONFIG_GADGET_UAC1_LEGACY if (!IS_ERR_OR_NULL(f_uac1)) usb_put_function(f_uac1); if (!IS_ERR_OR_NULL(fi_uac1)) -- cgit v1.2.3 From 0591bc2360152f851e29246884805bb77a2c3b9d Mon Sep 17 00:00:00 2001 From: Ruslan Bilovol Date: Sun, 18 Jun 2017 16:23:54 +0300 Subject: usb: gadget: add f_uac1 variant based on a new u_audio api This patch adds a new function 'f_uac1' (f_uac1 with virtual "ALSA card") that uses recently created u_audio API. Comparing to legacy f_uac1 function implementation it doesn't require any real Audio codec to be present on the device. In f_uac1 audio streams are simply sinked to and sourced from a virtual ALSA sound card created using u_audio API. Legacy f_uac1 approach is to write audio samples directly to existing ALSA sound card f_uac1 approach is more generic/flexible one - create an ALSA sound card that represents USB Audio function and allows to be used by userspace application that may choose to do whatever it wants with the data received from the USB Host and choose to provide whatever it wants as audio data to the USB Host. f_uac1 also has capture support (gadget->host) thanks to easy implementation via u_audio. By default, capture interface has 48000kHz/2ch configuration, same as playback channel has. f_uac1 descriptors naming convention uses f_uac2 driver naming convention that makes it more common and meaningful. Comparing to f_uac1_legacy, the f_uac1 doesn't have volume/mute functionality. This is because the f_uac1 volume/mute feature unit was dummy implementation since that driver creation (2009) and never had any real volume control or mute functionality, so there is no any difference here. Since f_uac1 functionality, exposed interface to userspace (virtual ALSA card), input parameters are so different comparing to f_uac1_legacy, that there is no any reason to keep them in the same file/module, and separate function was created. g_audio can be built using one of existing UAC functions (f_uac1, f_uac1_legacy or f_uac2) Signed-off-by: Ruslan Bilovol Signed-off-by: Felipe Balbi --- Documentation/ABI/testing/configfs-usb-gadget-uac1 | 14 + Documentation/usb/gadget-testing.txt | 44 ++ drivers/usb/gadget/Kconfig | 25 +- drivers/usb/gadget/function/Makefile | 2 + drivers/usb/gadget/function/f_uac1.c | 802 +++++++++++++++++++++ drivers/usb/gadget/function/u_uac1.h | 41 ++ drivers/usb/gadget/legacy/Kconfig | 18 +- drivers/usb/gadget/legacy/audio.c | 69 +- 8 files changed, 1000 insertions(+), 15 deletions(-) create mode 100644 Documentation/ABI/testing/configfs-usb-gadget-uac1 create mode 100644 drivers/usb/gadget/function/f_uac1.c create mode 100644 drivers/usb/gadget/function/u_uac1.h (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/configfs-usb-gadget-uac1 b/Documentation/ABI/testing/configfs-usb-gadget-uac1 new file mode 100644 index 000000000000..abfe447c848f --- /dev/null +++ b/Documentation/ABI/testing/configfs-usb-gadget-uac1 @@ -0,0 +1,14 @@ +What: /config/usb-gadget/gadget/functions/uac1.name +Date: June 2017 +KernelVersion: 4.14 +Description: + The attributes: + + c_chmask - capture channel mask + c_srate - capture sampling rate + c_ssize - capture sample size (bytes) + p_chmask - playback channel mask + p_srate - playback sampling rate + p_ssize - playback sample size (bytes) + req_number - the number of pre-allocated request + for both capture and playback diff --git a/Documentation/usb/gadget-testing.txt b/Documentation/usb/gadget-testing.txt index ce51d6e4e7d0..fbc397d17e98 100644 --- a/Documentation/usb/gadget-testing.txt +++ b/Documentation/usb/gadget-testing.txt @@ -20,6 +20,7 @@ provided by gadgets. 17. UAC2 function 18. UVC function 19. PRINTER function +20. UAC1 function (new API) 1. ACM function @@ -773,3 +774,46 @@ host: More advanced testing can be done with the prn_example described in Documentation/usb/gadget-printer.txt. + + +20. UAC1 function (virtual ALSA card, using u_audio API) +================= + +The function is provided by usb_f_uac1.ko module. +It will create a virtual ALSA card and the audio streams are simply +sinked to and sourced from it. + +Function-specific configfs interface +------------------------------------ + +The function name to use when creating the function directory is "uac1". +The uac1 function provides these attributes in its function directory: + + c_chmask - capture channel mask + c_srate - capture sampling rate + c_ssize - capture sample size (bytes) + p_chmask - playback channel mask + p_srate - playback sampling rate + p_ssize - playback sample size (bytes) + req_number - the number of pre-allocated request for both capture + and playback + +The attributes have sane default values. + +Testing the UAC1 function +------------------------- + +device: run the gadget +host: aplay -l # should list our USB Audio Gadget + +This function does not require real hardware support, it just +sends a stream of audio data to/from the host. In order to +actually hear something at the device side, a command similar +to this must be used at the device side: + +$ arecord -f dat -t wav -D hw:2,0 | aplay -D hw:0,0 & + +e.g.: + +$ arecord -f dat -t wav -D hw:CARD=UAC1Gadget,DEV=0 | \ +aplay -D default:CARD=OdroidU3 diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig index 01c2e2b9ab1d..35cc641d9f31 100644 --- a/drivers/usb/gadget/Kconfig +++ b/drivers/usb/gadget/Kconfig @@ -191,6 +191,9 @@ config USB_F_MASS_STORAGE config USB_F_FS tristate +config USB_F_UAC1 + tristate + config USB_F_UAC1_LEGACY tristate @@ -365,6 +368,24 @@ config USB_CONFIGFS_F_FS implemented in kernel space (for instance Ethernet, serial or mass storage) and other are implemented in user space. +config USB_CONFIGFS_F_UAC1 + bool "Audio Class 1.0" + depends on USB_CONFIGFS + depends on SND + select USB_LIBCOMPOSITE + select SND_PCM + select USB_U_AUDIO + select USB_F_UAC1 + help + This Audio function implements 1 AudioControl interface, + 1 AudioStreaming Interface each for USB-OUT and USB-IN. + 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. The user-space + application may choose to do whatever it wants with the data + received from the USB Host and choose to provide whatever it + wants as audio data to the USB Host. + config USB_CONFIGFS_F_UAC1_LEGACY bool "Audio Class 1.0 (legacy implementation)" depends on USB_CONFIGFS @@ -375,8 +396,8 @@ config USB_CONFIGFS_F_UAC1_LEGACY help This Audio function implements 1 AudioControl interface, 1 AudioStreaming Interface each for USB-OUT and USB-IN. - This driver requires a real Audio codec to be present - on the device. + This is a legacy driver and requires a real Audio codec + to be present on the device. config USB_CONFIGFS_F_UAC2 bool "Audio Class 2.0" diff --git a/drivers/usb/gadget/function/Makefile b/drivers/usb/gadget/function/Makefile index 50ee517faf74..86e825269947 100644 --- a/drivers/usb/gadget/function/Makefile +++ b/drivers/usb/gadget/function/Makefile @@ -33,6 +33,8 @@ obj-$(CONFIG_USB_F_MASS_STORAGE)+= usb_f_mass_storage.o usb_f_fs-y := f_fs.o obj-$(CONFIG_USB_F_FS) += usb_f_fs.o obj-$(CONFIG_USB_U_AUDIO) += u_audio.o +usb_f_uac1-y := f_uac1.o +obj-$(CONFIG_USB_F_UAC1) += usb_f_uac1.o usb_f_uac1_legacy-y := f_uac1_legacy.o u_uac1_legacy.o obj-$(CONFIG_USB_F_UAC1_LEGACY) += usb_f_uac1_legacy.o usb_f_uac2-y := f_uac2.o diff --git a/drivers/usb/gadget/function/f_uac1.c b/drivers/usb/gadget/function/f_uac1.c new file mode 100644 index 000000000000..8656f84e17d9 --- /dev/null +++ b/drivers/usb/gadget/function/f_uac1.c @@ -0,0 +1,802 @@ +/* + * f_uac1.c -- USB Audio Class 1.0 Function (using u_audio API) + * + * Copyright (C) 2016 Ruslan Bilovol + * + * 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 + * Copyright (C) 2008 Analog Devices, Inc + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include + +#include "u_audio.h" +#include "u_uac1.h" + +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() */ +}; + +static inline struct f_uac1 *func_to_uac1(struct usb_function *f) +{ + return container_of(f, struct f_uac1, g_audio.func); +} + +/* + * DESCRIPTORS ... most are static, but strings and full + * configuration descriptors are built on demand. + */ + +/* + * We have three interfaces - one AudioControl and two AudioStreaming + * + * The driver implements a simple UAC_1 topology. + * USB-OUT -> IT_1 -> OT_2 -> ALSA_Capture + * ALSA_Playback -> IT_3 -> OT_4 -> USB-IN + */ +#define F_AUDIO_AC_INTERFACE 0 +#define F_AUDIO_AS_OUT_INTERFACE 1 +#define F_AUDIO_AS_IN_INTERFACE 2 +/* Number of streaming interfaces */ +#define F_AUDIO_NUM_INTERFACES 2 + +/* B.3.1 Standard AC Interface Descriptor */ +static struct usb_interface_descriptor ac_interface_desc = { + .bLength = USB_DT_INTERFACE_SIZE, + .bDescriptorType = USB_DT_INTERFACE, + .bNumEndpoints = 0, + .bInterfaceClass = USB_CLASS_AUDIO, + .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, +}; + +/* + * The number of AudioStreaming and MIDIStreaming interfaces + * in the Audio Interface Collection + */ +DECLARE_UAC_AC_HEADER_DESCRIPTOR(2); + +#define UAC_DT_AC_HEADER_LENGTH UAC_DT_AC_HEADER_SIZE(F_AUDIO_NUM_INTERFACES) +/* 2 input terminals and 2 output terminals */ +#define UAC_DT_TOTAL_LENGTH (UAC_DT_AC_HEADER_LENGTH \ + + 2*UAC_DT_INPUT_TERMINAL_SIZE + 2*UAC_DT_OUTPUT_TERMINAL_SIZE) +/* B.3.2 Class-Specific AC Interface Descriptor */ +static struct uac1_ac_header_descriptor_2 ac_header_desc = { + .bLength = UAC_DT_AC_HEADER_LENGTH, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_HEADER, + .bcdADC = cpu_to_le16(0x0100), + .wTotalLength = cpu_to_le16(UAC_DT_TOTAL_LENGTH), + .bInCollection = F_AUDIO_NUM_INTERFACES, + .baInterfaceNr = { + /* Interface number of the AudioStream interfaces */ + [0] = 1, + [1] = 2, + } +}; + +#define USB_OUT_IT_ID 1 +static struct uac_input_terminal_descriptor usb_out_it_desc = { + .bLength = UAC_DT_INPUT_TERMINAL_SIZE, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_INPUT_TERMINAL, + .bTerminalID = USB_OUT_IT_ID, + .wTerminalType = UAC_TERMINAL_STREAMING, + .bAssocTerminal = 0, + .wChannelConfig = 0x3, +}; + +#define IO_OUT_OT_ID 2 +static struct uac1_output_terminal_descriptor io_out_ot_desc = { + .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, + .bTerminalID = IO_OUT_OT_ID, + .wTerminalType = UAC_OUTPUT_TERMINAL_SPEAKER, + .bAssocTerminal = 0, + .bSourceID = USB_OUT_IT_ID, +}; + +#define IO_IN_IT_ID 3 +static struct uac_input_terminal_descriptor io_in_it_desc = { + .bLength = UAC_DT_INPUT_TERMINAL_SIZE, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_INPUT_TERMINAL, + .bTerminalID = IO_IN_IT_ID, + .wTerminalType = UAC_INPUT_TERMINAL_MICROPHONE, + .bAssocTerminal = 0, + .wChannelConfig = 0x3, +}; + +#define USB_IN_OT_ID 4 +static struct uac1_output_terminal_descriptor usb_in_ot_desc = { + .bLength = UAC_DT_OUTPUT_TERMINAL_SIZE, + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, + .bTerminalID = USB_IN_OT_ID, + .wTerminalType = UAC_TERMINAL_STREAMING, + .bAssocTerminal = 0, + .bSourceID = IO_IN_IT_ID, +}; + +/* 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 = USB_OUT_IT_ID, + .bDelay = 1, + .wFormatTag = 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 = USB_IN_OT_ID, + .bDelay = 1, + .wFormatTag = UAC_FORMAT_TYPE_I_PCM, +}; + +DECLARE_UAC_FORMAT_TYPE_I_DISCRETE_DESC(1); + +static struct uac_format_type_i_discrete_descriptor_1 as_out_type_i_desc = { + .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1), + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_FORMAT_TYPE, + .bFormatType = UAC_FORMAT_TYPE_I, + .bSubframeSize = 2, + .bBitResolution = 16, + .bSamFreqType = 1, +}; + +/* Standard ISO OUT Endpoint Descriptor */ +static struct usb_endpoint_descriptor as_out_ep_desc = { + .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bEndpointAddress = USB_DIR_OUT, + .bmAttributes = USB_ENDPOINT_SYNC_ADAPTIVE + | USB_ENDPOINT_XFER_ISOC, + .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_1 as_in_type_i_desc = { + .bLength = UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(1), + .bDescriptorType = USB_DT_CS_INTERFACE, + .bDescriptorSubtype = UAC_FORMAT_TYPE, + .bFormatType = UAC_FORMAT_TYPE_I, + .bSubframeSize = 2, + .bBitResolution = 16, + .bSamFreqType = 1, +}; + +/* Standard ISO OUT Endpoint Descriptor */ +static struct usb_endpoint_descriptor as_in_ep_desc = { + .bLength = USB_DT_ENDPOINT_AUDIO_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bEndpointAddress = USB_DIR_IN, + .bmAttributes = USB_ENDPOINT_SYNC_ASYNC + | USB_ENDPOINT_XFER_ISOC, + .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 *)&io_in_it_desc, + (struct usb_descriptor_header *)&usb_in_ot_desc, + + (struct usb_descriptor_header *)&as_out_interface_alt_0_desc, + (struct usb_descriptor_header *)&as_out_interface_alt_1_desc, + (struct usb_descriptor_header *)&as_out_header_desc, + + (struct usb_descriptor_header *)&as_out_type_i_desc, + + (struct usb_descriptor_header *)&as_out_ep_desc, + (struct usb_descriptor_header *)&as_iso_out_desc, + + (struct usb_descriptor_header *)&as_in_interface_alt_0_desc, + (struct usb_descriptor_header *)&as_in_interface_alt_1_desc, + (struct usb_descriptor_header *)&as_in_header_desc, + + (struct usb_descriptor_header *)&as_in_type_i_desc, + + (struct usb_descriptor_header *)&as_in_ep_desc, + (struct usb_descriptor_header *)&as_iso_in_desc, + NULL, +}; + +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_AS_OUT_IF_ALT0, + STR_AS_OUT_IF_ALT1, + STR_AS_IN_IF_ALT0, + STR_AS_IN_IF_ALT1, +}; + +static struct usb_string strings_uac1[] = { + [STR_AC_IF].s = "AC Interface", + [STR_USB_OUT_IT].s = "Playback Input terminal", + [STR_USB_OUT_IT_CH_NAMES].s = "Playback Channels", + [STR_IO_OUT_OT].s = "Playback Output terminal", + [STR_IO_IN_IT].s = "Capture Input terminal", + [STR_IO_IN_IT_CH_NAMES].s = "Capture Channels", + [STR_USB_IN_OT].s = "Capture Output terminal", + [STR_AS_OUT_IF_ALT0].s = "Playback Inactive", + [STR_AS_OUT_IF_ALT1].s = "Playback Active", + [STR_AS_IN_IF_ALT0].s = "Capture Inactive", + [STR_AS_IN_IF_ALT1].s = "Capture Active", + { }, +}; + +static struct usb_gadget_strings str_uac1 = { + .language = 0x0409, /* en-us */ + .strings = strings_uac1, +}; + +static struct usb_gadget_strings *uac1_strings[] = { + &str_uac1, + NULL, +}; + +/* + * This function is an ALSA sound card following USB Audio Class Spec 1.0. + */ + +static int audio_set_endpoint_req(struct usb_function *f, + const struct usb_ctrlrequest *ctrl) +{ + struct usb_composite_dev *cdev = f->config->cdev; + int value = -EOPNOTSUPP; + u16 ep = le16_to_cpu(ctrl->wIndex); + u16 len = le16_to_cpu(ctrl->wLength); + u16 w_value = le16_to_cpu(ctrl->wValue); + + DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", + ctrl->bRequest, w_value, len, ep); + + switch (ctrl->bRequest) { + case UAC_SET_CUR: + value = len; + break; + + case UAC_SET_MIN: + break; + + case UAC_SET_MAX: + break; + + case UAC_SET_RES: + break; + + case UAC_SET_MEM: + break; + + default: + break; + } + + return value; +} + +static int audio_get_endpoint_req(struct usb_function *f, + const struct usb_ctrlrequest *ctrl) +{ + struct usb_composite_dev *cdev = f->config->cdev; + int value = -EOPNOTSUPP; + u8 ep = ((le16_to_cpu(ctrl->wIndex) >> 8) & 0xFF); + u16 len = le16_to_cpu(ctrl->wLength); + u16 w_value = le16_to_cpu(ctrl->wValue); + + DBG(cdev, "bRequest 0x%x, w_value 0x%04x, len %d, endpoint %d\n", + ctrl->bRequest, w_value, len, ep); + + switch (ctrl->bRequest) { + case UAC_GET_CUR: + case UAC_GET_MIN: + case UAC_GET_MAX: + case UAC_GET_RES: + value = len; + break; + case UAC_GET_MEM: + break; + default: + break; + } + + return value; +} + +static int +f_audio_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) +{ + struct usb_composite_dev *cdev = f->config->cdev; + struct usb_request *req = cdev->req; + int value = -EOPNOTSUPP; + u16 w_index = le16_to_cpu(ctrl->wIndex); + u16 w_value = le16_to_cpu(ctrl->wValue); + u16 w_length = le16_to_cpu(ctrl->wLength); + + /* composite driver infrastructure handles everything; interface + * activation uses set_alt(). + */ + switch (ctrl->bRequestType) { + case USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: + value = audio_set_endpoint_req(f, ctrl); + break; + + case USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_ENDPOINT: + value = audio_get_endpoint_req(f, ctrl); + break; + + default: + ERROR(cdev, "invalid control req%02x.%02x v%04x i%04x l%d\n", + ctrl->bRequestType, ctrl->bRequest, + w_value, w_index, w_length); + } + + /* respond with data transfer or status phase? */ + if (value >= 0) { + DBG(cdev, "audio req%02x.%02x v%04x i%04x l%d\n", + ctrl->bRequestType, ctrl->bRequest, + w_value, w_index, w_length); + req->zero = 0; + req->length = value; + value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); + if (value < 0) + ERROR(cdev, "audio response on err %d\n", value); + } + + /* device either stalls (value < 0) or reports success */ + return value; +} + +static int f_audio_set_alt(struct usb_function *f, unsigned intf, unsigned alt) +{ + struct 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); + 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; + } + 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_capture(&uac1->g_audio); +} + +/*-------------------------------------------------------------------------*/ + +/* 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 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; + u8 *sam_freq; + int rate; + int status; + + audio_opts = container_of(f->fi, struct f_uac1_opts, func_inst); + + us = usb_gstrings_attach(cdev, uac1_strings, ARRAY_SIZE(strings_uac1)); + if (IS_ERR(us)) + return PTR_ERR(us); + ac_interface_desc.iInterface = us[STR_AC_IF].id; + usb_out_it_desc.iTerminal = us[STR_USB_OUT_IT].id; + usb_out_it_desc.iChannelNames = us[STR_USB_OUT_IT_CH_NAMES].id; + io_out_ot_desc.iTerminal = us[STR_IO_OUT_OT].id; + as_out_interface_alt_0_desc.iInterface = us[STR_AS_OUT_IF_ALT0].id; + as_out_interface_alt_1_desc.iInterface = us[STR_AS_OUT_IF_ALT1].id; + 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; + + /* 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; + + /* Set sample rates */ + rate = audio_opts->c_srate; + sam_freq = as_out_type_i_desc.tSamFreq[0]; + memcpy(sam_freq, &rate, 3); + rate = audio_opts->p_srate; + sam_freq = as_in_type_i_desc.tSamFreq[0]; + memcpy(sam_freq, &rate, 3); + + /* allocate instance-specific interface IDs, and patch descriptors */ + status = usb_interface_id(c, f); + if (status < 0) + goto fail; + ac_interface_desc.bInterfaceNumber = status; + uac1->ac_intf = status; + uac1->ac_alt = 0; + + status = usb_interface_id(c, f); + if (status < 0) + goto fail; + as_out_interface_alt_0_desc.bInterfaceNumber = status; + as_out_interface_alt_1_desc.bInterfaceNumber = status; + uac1->as_out_intf = status; + uac1->as_out_alt = 0; + + status = usb_interface_id(c, f); + if (status < 0) + goto fail; + as_in_interface_alt_0_desc.bInterfaceNumber = status; + as_in_interface_alt_1_desc.bInterfaceNumber = status; + uac1->as_in_intf = status; + uac1->as_in_alt = 0; + + audio->gadget = gadget; + + status = -ENODEV; + + /* allocate instance-specific endpoints */ + ep = usb_ep_autoconfig(cdev->gadget, &as_out_ep_desc); + if (!ep) + goto fail; + audio->out_ep = ep; + audio->out_ep->desc = &as_out_ep_desc; + + ep = usb_ep_autoconfig(cdev->gadget, &as_in_ep_desc); + if (!ep) + goto fail; + audio->in_ep = ep; + audio->in_ep->desc = &as_in_ep_desc; + + /* copy descriptors, and track endpoint copies */ + status = usb_assign_descriptors(f, f_audio_desc, f_audio_desc, NULL, + NULL); + if (status) + goto fail; + + audio->out_ep_maxpsize = as_out_ep_desc.wMaxPacketSize; + audio->in_ep_maxpsize = as_in_ep_desc.wMaxPacketSize; + audio->params.c_chmask = audio_opts->c_chmask; + audio->params.c_srate = audio_opts->c_srate; + audio->params.c_ssize = audio_opts->c_ssize; + audio->params.p_chmask = audio_opts->p_chmask; + audio->params.p_srate = audio_opts->p_srate; + audio->params.p_ssize = audio_opts->p_ssize; + audio->params.req_number = audio_opts->req_number; + + 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); +fail: + 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_ATTRIBUTE(name) \ +static ssize_t f_uac1_opts_##name##_show( \ + struct config_item *item, \ + char *page) \ +{ \ + struct f_uac1_opts *opts = to_f_uac1_opts(item); \ + int result; \ + \ + mutex_lock(&opts->lock); \ + result = sprintf(page, "%u\n", opts->name); \ + mutex_unlock(&opts->lock); \ + \ + return result; \ +} \ + \ +static ssize_t f_uac1_opts_##name##_store( \ + struct config_item *item, \ + const char *page, size_t len) \ +{ \ + struct f_uac1_opts *opts = to_f_uac1_opts(item); \ + int ret; \ + u32 num; \ + \ + mutex_lock(&opts->lock); \ + if (opts->refcnt) { \ + ret = -EBUSY; \ + goto end; \ + } \ + \ + ret = kstrtou32(page, 0, &num); \ + if (ret) \ + goto end; \ + \ + opts->name = num; \ + ret = len; \ + \ +end: \ + mutex_unlock(&opts->lock); \ + return ret; \ +} \ + \ +CONFIGFS_ATTR(f_uac1_opts_, name) + +UAC1_ATTRIBUTE(c_chmask); +UAC1_ATTRIBUTE(c_srate); +UAC1_ATTRIBUTE(c_ssize); +UAC1_ATTRIBUTE(p_chmask); +UAC1_ATTRIBUTE(p_srate); +UAC1_ATTRIBUTE(p_ssize); +UAC1_ATTRIBUTE(req_number); + +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, + NULL, +}; + +static struct config_item_type f_uac1_func_type = { + .ct_item_ops = &f_uac1_item_ops, + .ct_attrs = f_uac1_attrs, + .ct_owner = THIS_MODULE, +}; + +static void f_audio_free_inst(struct usb_function_instance *f) +{ + struct f_uac1_opts *opts; + + opts = container_of(f, struct f_uac1_opts, func_inst); + 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_srate = UAC1_DEF_CSRATE; + opts->c_ssize = UAC1_DEF_CSSIZE; + opts->p_chmask = UAC1_DEF_PCHMASK; + opts->p_srate = UAC1_DEF_PSRATE; + opts->p_ssize = UAC1_DEF_PSSIZE; + opts->req_number = UAC1_DEF_REQ_NUM; + 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); + + 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.free_func = f_audio_free; + + return &uac1->g_audio.func; +} + +DECLARE_USB_FUNCTION_INIT(uac1, f_audio_alloc_inst, f_audio_alloc); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ruslan Bilovol"); diff --git a/drivers/usb/gadget/function/u_uac1.h b/drivers/usb/gadget/function/u_uac1.h new file mode 100644 index 000000000000..6f188fd8633f --- /dev/null +++ b/drivers/usb/gadget/function/u_uac1.h @@ -0,0 +1,41 @@ +/* + * u_uac1.h - Utility definitions for UAC1 function + * + * Copyright (C) 2016 Ruslan Bilovol + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __U_UAC1_H +#define __U_UAC1_H + +#include + +#define UAC1_OUT_EP_MAX_PACKET_SIZE 200 +#define UAC1_DEF_CCHMASK 0x3 +#define UAC1_DEF_CSRATE 48000 +#define UAC1_DEF_CSSIZE 2 +#define UAC1_DEF_PCHMASK 0x3 +#define UAC1_DEF_PSRATE 48000 +#define UAC1_DEF_PSSIZE 2 +#define UAC1_DEF_REQ_NUM 2 + + +struct f_uac1_opts { + struct usb_function_instance func_inst; + int c_chmask; + int c_srate; + int c_ssize; + int p_chmask; + int p_srate; + int p_ssize; + int req_number; + unsigned bound:1; + + struct mutex lock; + int refcnt; +}; + +#endif /* __U_UAC1_H */ diff --git a/drivers/usb/gadget/legacy/Kconfig b/drivers/usb/gadget/legacy/Kconfig index 87bacb638a9c..a12fb459dbd9 100644 --- a/drivers/usb/gadget/legacy/Kconfig +++ b/drivers/usb/gadget/legacy/Kconfig @@ -54,9 +54,10 @@ config USB_AUDIO depends on SND select USB_LIBCOMPOSITE select SND_PCM - select USB_F_UAC1_LEGACY if GADGET_UAC1_LEGACY - select USB_F_UAC2 if !GADGET_UAC1_LEGACY - select USB_U_AUDIO if USB_F_UAC2 + select USB_F_UAC1 if (GADGET_UAC1 && !GADGET_UAC1_LEGACY) + select USB_F_UAC1_LEGACY if (GADGET_UAC1 && GADGET_UAC1_LEGACY) + select USB_F_UAC2 if !GADGET_UAC1 + select USB_U_AUDIO if (USB_F_UAC2 || USB_F_UAC1) help This Gadget Audio driver is compatible with USB Audio Class specification 2.0. It implements 1 AudioControl interface, @@ -73,11 +74,18 @@ config USB_AUDIO Say "y" to link the driver statically, or "m" to build a dynamically linked module called "g_audio". +config GADGET_UAC1 + bool "UAC 1.0" + depends on USB_AUDIO + help + If you instead want older USB Audio Class specification 1.0 support + with similar driver capabilities. + config GADGET_UAC1_LEGACY bool "UAC 1.0 (Legacy)" - depends on USB_AUDIO + depends on GADGET_UAC1 help - If you instead want older UAC Spec-1.0 driver that also has audio + If you instead want legacy UAC Spec-1.0 driver that also has audio paths hardwired to the Audio codec chip on-board and doesn't work without one. diff --git a/drivers/usb/gadget/legacy/audio.c b/drivers/usb/gadget/legacy/audio.c index bf5592a5b9e9..1f5cdbe162df 100644 --- a/drivers/usb/gadget/legacy/audio.c +++ b/drivers/usb/gadget/legacy/audio.c @@ -20,7 +20,7 @@ USB_GADGET_COMPOSITE_OPTIONS(); -#ifndef CONFIG_GADGET_UAC1_LEGACY +#ifndef CONFIG_GADGET_UAC1 #include "u_uac2.h" /* Playback(USB-IN) Default Stereo - Fl/Fr */ @@ -53,6 +53,39 @@ static int c_ssize = UAC2_DEF_CSSIZE; module_param(c_ssize, uint, S_IRUGO); MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)"); #else +#ifndef CONFIG_GADGET_UAC1_LEGACY +#include "u_uac1.h" + +/* Playback(USB-IN) Default Stereo - Fl/Fr */ +static int p_chmask = UAC1_DEF_PCHMASK; +module_param(p_chmask, uint, S_IRUGO); +MODULE_PARM_DESC(p_chmask, "Playback Channel Mask"); + +/* Playback Default 48 KHz */ +static int p_srate = UAC1_DEF_PSRATE; +module_param(p_srate, uint, S_IRUGO); +MODULE_PARM_DESC(p_srate, "Playback Sampling Rate"); + +/* Playback Default 16bits/sample */ +static int p_ssize = UAC1_DEF_PSSIZE; +module_param(p_ssize, uint, S_IRUGO); +MODULE_PARM_DESC(p_ssize, "Playback Sample Size(bytes)"); + +/* Capture(USB-OUT) Default Stereo - Fl/Fr */ +static int c_chmask = UAC1_DEF_CCHMASK; +module_param(c_chmask, uint, S_IRUGO); +MODULE_PARM_DESC(c_chmask, "Capture Channel Mask"); + +/* Capture Default 48 KHz */ +static int c_srate = UAC1_DEF_CSRATE; +module_param(c_srate, uint, S_IRUGO); +MODULE_PARM_DESC(c_srate, "Capture Sampling Rate"); + +/* Capture Default 16bits/sample */ +static int c_ssize = UAC1_DEF_CSSIZE; +module_param(c_ssize, uint, S_IRUGO); +MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)"); +#else /* CONFIG_GADGET_UAC1_LEGACY */ #include "u_uac1_legacy.h" static char *fn_play = FILE_PCM_PLAYBACK; @@ -78,6 +111,7 @@ MODULE_PARM_DESC(req_count, "ISO OUT endpoint request count"); static int audio_buf_size = UAC1_AUDIO_BUF_SIZE; module_param(audio_buf_size, int, S_IRUGO); MODULE_PARM_DESC(audio_buf_size, "Audio buffer size"); +#endif /* CONFIG_GADGET_UAC1_LEGACY */ #endif /* string IDs are assigned dynamically */ @@ -99,7 +133,7 @@ static struct usb_gadget_strings *audio_strings[] = { NULL, }; -#ifndef CONFIG_GADGET_UAC1_LEGACY +#ifndef CONFIG_GADGET_UAC1 static struct usb_function_instance *fi_uac2; static struct usb_function *f_uac2; #else @@ -164,7 +198,7 @@ static int audio_do_config(struct usb_configuration *c) c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; } -#ifdef CONFIG_GADGET_UAC1_LEGACY +#ifdef CONFIG_GADGET_UAC1 f_uac1 = usb_get_function(fi_uac1); if (IS_ERR(f_uac1)) { status = PTR_ERR(f_uac1); @@ -204,24 +238,32 @@ static struct usb_configuration audio_config_driver = { static int audio_bind(struct usb_composite_dev *cdev) { -#ifndef CONFIG_GADGET_UAC1_LEGACY +#ifndef CONFIG_GADGET_UAC1 struct f_uac2_opts *uac2_opts; +#else +#ifndef CONFIG_GADGET_UAC1_LEGACY + struct f_uac1_opts *uac1_opts; #else struct f_uac1_legacy_opts *uac1_opts; +#endif #endif int status; -#ifndef CONFIG_GADGET_UAC1_LEGACY +#ifndef CONFIG_GADGET_UAC1 fi_uac2 = usb_get_function_instance("uac2"); if (IS_ERR(fi_uac2)) return PTR_ERR(fi_uac2); +#else +#ifndef CONFIG_GADGET_UAC1_LEGACY + fi_uac1 = usb_get_function_instance("uac1"); #else fi_uac1 = usb_get_function_instance("uac1_legacy"); +#endif if (IS_ERR(fi_uac1)) return PTR_ERR(fi_uac1); #endif -#ifndef CONFIG_GADGET_UAC1_LEGACY +#ifndef CONFIG_GADGET_UAC1 uac2_opts = container_of(fi_uac2, struct f_uac2_opts, func_inst); uac2_opts->p_chmask = p_chmask; uac2_opts->p_srate = p_srate; @@ -231,6 +273,16 @@ static int audio_bind(struct usb_composite_dev *cdev) uac2_opts->c_ssize = c_ssize; uac2_opts->req_number = UAC2_DEF_REQ_NUM; #else +#ifndef CONFIG_GADGET_UAC1_LEGACY + uac1_opts = container_of(fi_uac1, struct f_uac1_opts, func_inst); + uac1_opts->p_chmask = p_chmask; + uac1_opts->p_srate = p_srate; + uac1_opts->p_ssize = p_ssize; + uac1_opts->c_chmask = c_chmask; + uac1_opts->c_srate = c_srate; + uac1_opts->c_ssize = c_ssize; + uac1_opts->req_number = UAC1_DEF_REQ_NUM; +#else /* CONFIG_GADGET_UAC1_LEGACY */ uac1_opts = container_of(fi_uac1, struct f_uac1_legacy_opts, func_inst); uac1_opts->fn_play = fn_play; uac1_opts->fn_cap = fn_cap; @@ -238,6 +290,7 @@ static int audio_bind(struct usb_composite_dev *cdev) uac1_opts->req_buf_size = req_buf_size; uac1_opts->req_count = req_count; uac1_opts->audio_buf_size = audio_buf_size; +#endif /* CONFIG_GADGET_UAC1_LEGACY */ #endif status = usb_string_ids_tab(cdev, strings_dev); @@ -269,7 +322,7 @@ fail_otg_desc: kfree(otg_desc[0]); otg_desc[0] = NULL; fail: -#ifndef CONFIG_GADGET_UAC1_LEGACY +#ifndef CONFIG_GADGET_UAC1 usb_put_function_instance(fi_uac2); #else usb_put_function_instance(fi_uac1); @@ -279,7 +332,7 @@ fail: static int audio_unbind(struct usb_composite_dev *cdev) { -#ifdef CONFIG_GADGET_UAC1_LEGACY +#ifdef CONFIG_GADGET_UAC1 if (!IS_ERR_OR_NULL(f_uac1)) usb_put_function(f_uac1); if (!IS_ERR_OR_NULL(fi_uac1)) -- cgit v1.2.3