* Copyright (C) 2011
* Yadwinder Singh (yadi.brar01@gmail.com)
* Jaswinder Singh (jaswinder.singh@linaro.org)
+ *
+ * Copyright (C) 2020
+ * Ruslan Bilovol (ruslan.bilovol@gmail.com)
*/
#include <linux/usb/audio.h>
/*
* The driver implements a simple UAC_2 topology.
- * USB-OUT -> IT_1 -> OT_3 -> ALSA_Capture
- * ALSA_Playback -> IT_2 -> OT_4 -> USB-IN
+ * USB-OUT -> IT_1 -> FU -> OT_3 -> ALSA_Capture
+ * ALSA_Playback -> IT_2 -> FU -> OT_4 -> USB-IN
* Capture and Playback sampling rates are independently
* controlled by two clock sources :
* CLK_5 := c_srate, and CLK_6 := p_srate
*/
#define USB_OUT_CLK_ID (out_clk_src_desc.bClockID)
#define USB_IN_CLK_ID (in_clk_src_desc.bClockID)
+#define USB_OUT_FU_ID (out_feature_unit_desc->bUnitID)
+#define USB_IN_FU_ID (in_feature_unit_desc->bUnitID)
#define CONTROL_ABSENT 0
#define CONTROL_RDONLY 1
#define CLK_FREQ_CTRL 0
#define CLK_VLD_CTRL 2
+#define FU_MUTE_CTRL 0
+#define FU_VOL_CTRL 2
#define COPY_CTRL 0
#define CONN_CTRL 2
#define EPIN_EN(_opts) ((_opts)->p_chmask != 0)
#define EPOUT_EN(_opts) ((_opts)->c_chmask != 0)
+#define FUIN_EN(_opts) (EPIN_EN(_opts) \
+ && ((_opts)->p_mute_present \
+ || (_opts)->p_volume_present))
+#define FUOUT_EN(_opts) (EPOUT_EN(_opts) \
+ && ((_opts)->c_mute_present \
+ || (_opts)->c_volume_present))
#define EPOUT_FBACK_IN_EN(_opts) ((_opts)->c_sync == USB_ENDPOINT_SYNC_ASYNC)
struct f_uac2 {
struct g_audio g_audio;
u8 ac_intf, as_in_intf, as_out_intf;
u8 ac_alt, as_in_alt, as_out_alt; /* needed for get_alt() */
+
+ struct usb_ctrlrequest setup_cr; /* will be used in data stage */
+
+ /* Interrupt IN endpoint of AC interface */
+ struct usb_ep *int_ep;
+ atomic_t int_count;
};
static inline struct f_uac2 *func_to_uac2(struct usb_function *f)
return container_of(agdev->func.fi, struct f_uac2_opts, func_inst);
}
+static int afunc_notify(struct g_audio *agdev, int unit_id, int cs);
+
/* --------- USB Function Interface ------------- */
enum {
STR_IO_IT,
STR_USB_OT,
STR_IO_OT,
+ STR_FU_IN,
+ STR_FU_OUT,
STR_AS_OUT_ALT0,
STR_AS_OUT_ALT1,
STR_AS_IN_ALT0,
[STR_IO_IT].s = "USBD Out",
[STR_USB_OT].s = "USBH In",
[STR_IO_OT].s = "USBD In",
+ [STR_FU_IN].s = "Capture Volume",
+ [STR_FU_OUT].s = "Playback Volume",
[STR_AS_OUT_ALT0].s = "Playback Inactive",
[STR_AS_OUT_ALT1].s = "Playback Active",
[STR_AS_IN_ALT0].s = "Capture Inactive",
.bDescriptorType = USB_DT_INTERFACE,
.bAlternateSetting = 0,
- .bNumEndpoints = 0,
+ /* .bNumEndpoints = DYNAMIC */
.bInterfaceClass = USB_CLASS_AUDIO,
.bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL,
.bInterfaceProtocol = UAC_VERSION_2,
.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
};
+static struct uac2_feature_unit_descriptor *in_feature_unit_desc;
+static struct uac2_feature_unit_descriptor *out_feature_unit_desc;
+
static struct uac2_ac_header_descriptor ac_hdr_desc = {
.bLength = sizeof ac_hdr_desc,
.bDescriptorType = USB_DT_CS_INTERFACE,
.bmControls = 0,
};
+/* AC IN Interrupt Endpoint */
+static struct usb_endpoint_descriptor fs_ep_int_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(6),
+ .bInterval = 1,
+};
+
+static struct usb_endpoint_descriptor hs_ep_int_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(6),
+ .bInterval = 4,
+};
+
+static struct usb_endpoint_descriptor ss_ep_int_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = cpu_to_le16(6),
+ .bInterval = 4,
+};
+
/* Audio Streaming OUT Interface - Alt0 */
static struct usb_interface_descriptor std_as_out_if0_desc = {
.bLength = sizeof std_as_out_if0_desc,
(struct usb_descriptor_header *)&in_clk_src_desc,
(struct usb_descriptor_header *)&out_clk_src_desc,
(struct usb_descriptor_header *)&usb_out_it_desc,
+ (struct usb_descriptor_header *)&out_feature_unit_desc,
(struct usb_descriptor_header *)&io_in_it_desc,
(struct usb_descriptor_header *)&usb_in_ot_desc,
+ (struct usb_descriptor_header *)&in_feature_unit_desc,
(struct usb_descriptor_header *)&io_out_ot_desc,
+ (struct usb_descriptor_header *)&fs_ep_int_desc,
+
(struct usb_descriptor_header *)&std_as_out_if0_desc,
(struct usb_descriptor_header *)&std_as_out_if1_desc,
(struct usb_descriptor_header *)&in_clk_src_desc,
(struct usb_descriptor_header *)&out_clk_src_desc,
(struct usb_descriptor_header *)&usb_out_it_desc,
+ (struct usb_descriptor_header *)&out_feature_unit_desc,
(struct usb_descriptor_header *)&io_in_it_desc,
(struct usb_descriptor_header *)&usb_in_ot_desc,
+ (struct usb_descriptor_header *)&in_feature_unit_desc,
(struct usb_descriptor_header *)&io_out_ot_desc,
+ (struct usb_descriptor_header *)&hs_ep_int_desc,
+
(struct usb_descriptor_header *)&std_as_out_if0_desc,
(struct usb_descriptor_header *)&std_as_out_if1_desc,
(struct usb_descriptor_header *)&in_clk_src_desc,
(struct usb_descriptor_header *)&out_clk_src_desc,
(struct usb_descriptor_header *)&usb_out_it_desc,
+ (struct usb_descriptor_header *)&out_feature_unit_desc,
(struct usb_descriptor_header *)&io_in_it_desc,
(struct usb_descriptor_header *)&usb_in_ot_desc,
+ (struct usb_descriptor_header *)&in_feature_unit_desc,
(struct usb_descriptor_header *)&io_out_ot_desc,
+ (struct usb_descriptor_header *)&ss_ep_int_desc,
+
(struct usb_descriptor_header *)&std_as_out_if0_desc,
(struct usb_descriptor_header *)&std_as_out_if1_desc,
NULL,
};
+struct cntrl_cur_lay2 {
+ __le16 wCUR;
+};
+
+struct cntrl_range_lay2 {
+ __le16 wNumSubRanges;
+ __le16 wMIN;
+ __le16 wMAX;
+ __le16 wRES;
+} __packed;
+
struct cntrl_cur_lay3 {
__le32 dCUR;
};
return 0;
}
+static struct uac2_feature_unit_descriptor *build_fu_desc(int chmask)
+{
+ struct uac2_feature_unit_descriptor *fu_desc;
+ int channels = num_channels(chmask);
+ int fu_desc_size = UAC2_DT_FEATURE_UNIT_SIZE(channels);
+
+ fu_desc = kzalloc(fu_desc_size, GFP_KERNEL);
+ if (!fu_desc)
+ return NULL;
+
+ fu_desc->bLength = fu_desc_size;
+ fu_desc->bDescriptorType = USB_DT_CS_INTERFACE;
+
+ fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT;
+
+ /* bUnitID, bSourceID and bmaControls will be defined later */
+
+ return fu_desc;
+}
+
/* Use macro to overcome line length limitation */
#define USBDHDR(p) (struct usb_descriptor_header *)(p)
struct usb_endpoint_descriptor *epout_desc;
struct usb_endpoint_descriptor *epin_desc;
struct usb_endpoint_descriptor *epin_fback_desc;
+ struct usb_endpoint_descriptor *ep_int_desc;
int i;
switch (speed) {
epout_desc = &fs_epout_desc;
epin_desc = &fs_epin_desc;
epin_fback_desc = &fs_epin_fback_desc;
+ ep_int_desc = &fs_ep_int_desc;
break;
case USB_SPEED_HIGH:
epout_desc = &hs_epout_desc;
epin_desc = &hs_epin_desc;
epin_fback_desc = &hs_epin_fback_desc;
+ ep_int_desc = &hs_ep_int_desc;
break;
default:
epout_desc = &ss_epout_desc;
epout_desc_comp = &ss_epout_desc_comp;
epin_desc_comp = &ss_epin_desc_comp;
epin_fback_desc = &ss_epin_fback_desc;
+ ep_int_desc = &ss_ep_int_desc;
}
i = 0;
if (EPOUT_EN(opts)) {
headers[i++] = USBDHDR(&out_clk_src_desc);
headers[i++] = USBDHDR(&usb_out_it_desc);
- }
+
+ if (FUOUT_EN(opts))
+ headers[i++] = USBDHDR(out_feature_unit_desc);
+ }
+
if (EPIN_EN(opts)) {
headers[i++] = USBDHDR(&io_in_it_desc);
+
+ if (FUIN_EN(opts))
+ headers[i++] = USBDHDR(in_feature_unit_desc);
+
headers[i++] = USBDHDR(&usb_in_ot_desc);
}
- if (EPOUT_EN(opts)) {
+
+ if (EPOUT_EN(opts))
headers[i++] = USBDHDR(&io_out_ot_desc);
+
+ if (FUOUT_EN(opts) || FUIN_EN(opts))
+ headers[i++] = USBDHDR(ep_int_desc);
+
+ if (EPOUT_EN(opts)) {
headers[i++] = USBDHDR(&std_as_out_if0_desc);
headers[i++] = USBDHDR(&std_as_out_if1_desc);
headers[i++] = USBDHDR(&as_out_hdr_desc);
if (EPOUT_FBACK_IN_EN(opts))
headers[i++] = USBDHDR(epin_fback_desc);
}
+
if (EPIN_EN(opts)) {
headers[i++] = USBDHDR(&std_as_in_if0_desc);
headers[i++] = USBDHDR(&std_as_in_if1_desc);
io_out_ot_desc.bTerminalID = i++;
if (EPIN_EN(opts))
usb_in_ot_desc.bTerminalID = i++;
+ if (FUOUT_EN(opts))
+ out_feature_unit_desc->bUnitID = i++;
+ if (FUIN_EN(opts))
+ in_feature_unit_desc->bUnitID = i++;
if (EPOUT_EN(opts))
out_clk_src_desc.bClockID = i++;
if (EPIN_EN(opts))
in_clk_src_desc.bClockID = i++;
usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID;
- usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
+
+ if (FUIN_EN(opts)) {
+ usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID;
+ in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID;
+ } else {
+ usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
+ }
+
usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID;
io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID;
io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID;
- io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
+
+ if (FUOUT_EN(opts)) {
+ io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID;
+ out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID;
+ } else {
+ io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
+ }
+
as_out_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID;
as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID;
len += sizeof(in_clk_src_desc);
len += sizeof(usb_in_ot_desc);
+
+ if (FUIN_EN(opts))
+ len += in_feature_unit_desc->bLength;
+
len += sizeof(io_in_it_desc);
ac_hdr_desc.wTotalLength = cpu_to_le16(len);
iad_desc.bInterfaceCount++;
len += sizeof(out_clk_src_desc);
len += sizeof(usb_out_it_desc);
+
+ if (FUOUT_EN(opts))
+ len += out_feature_unit_desc->bLength;
+
len += sizeof(io_out_ot_desc);
ac_hdr_desc.wTotalLength = cpu_to_le16(len);
iad_desc.bInterfaceCount++;
return -EINVAL;
}
+ if (opts->p_volume_max <= opts->p_volume_min) {
+ dev_err(dev, "Error: incorrect playback volume max/min\n");
+ return -EINVAL;
+ } else if (opts->c_volume_max <= opts->c_volume_min) {
+ dev_err(dev, "Error: incorrect capture volume max/min\n");
+ return -EINVAL;
+ } else if (opts->p_volume_res <= 0) {
+ dev_err(dev, "Error: negative/zero playback volume resolution\n");
+ return -EINVAL;
+ } else if (opts->c_volume_res <= 0) {
+ dev_err(dev, "Error: negative/zero capture volume resolution\n");
+ return -EINVAL;
+ }
+
+ if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) {
+ dev_err(dev, "Error: incorrect playback volume resolution\n");
+ return -EINVAL;
+ } else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) {
+ dev_err(dev, "Error: incorrect capture volume resolution\n");
+ return -EINVAL;
+ }
+
return 0;
}
us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn));
if (IS_ERR(us))
return PTR_ERR(us);
+
+ if (FUOUT_EN(uac2_opts)) {
+ out_feature_unit_desc = build_fu_desc(uac2_opts->c_chmask);
+ if (!out_feature_unit_desc)
+ return -ENOMEM;
+ }
+ if (FUIN_EN(uac2_opts)) {
+ in_feature_unit_desc = build_fu_desc(uac2_opts->p_chmask);
+ if (!in_feature_unit_desc) {
+ ret = -ENOMEM;
+ goto err_free_fu;
+ }
+ }
+
iad_desc.iFunction = us[STR_ASSOC].id;
std_ac_if_desc.iInterface = us[STR_IF_CTRL].id;
in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id;
std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id;
std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id;
+ if (FUOUT_EN(uac2_opts)) {
+ u8 *i_feature = (u8 *)out_feature_unit_desc;
+
+ i_feature = (u8 *)out_feature_unit_desc +
+ out_feature_unit_desc->bLength - 1;
+ *i_feature = us[STR_FU_OUT].id;
+ }
+ if (FUIN_EN(uac2_opts)) {
+ u8 *i_feature = (u8 *)in_feature_unit_desc;
+
+ i_feature = (u8 *)in_feature_unit_desc +
+ in_feature_unit_desc->bLength - 1;
+ *i_feature = us[STR_FU_IN].id;
+ }
+
/* Initialize the configurable parameters */
usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask);
as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8;
as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize;
as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8;
+ if (FUOUT_EN(uac2_opts)) {
+ __le32 *bma = (__le32 *)&out_feature_unit_desc->bmaControls[0];
+ u32 control = 0;
+
+ if (uac2_opts->c_mute_present)
+ control |= CONTROL_RDWR << FU_MUTE_CTRL;
+ if (uac2_opts->c_volume_present)
+ control |= CONTROL_RDWR << FU_VOL_CTRL;
+ *bma = cpu_to_le32(control);
+ }
+ if (FUIN_EN(uac2_opts)) {
+ __le32 *bma = (__le32 *)&in_feature_unit_desc->bmaControls[0];
+ u32 control = 0;
+
+ if (uac2_opts->p_mute_present)
+ control |= CONTROL_RDWR << FU_MUTE_CTRL;
+ if (uac2_opts->p_volume_present)
+ control |= CONTROL_RDWR << FU_VOL_CTRL;
+ *bma = cpu_to_le32(control);
+ }
snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", uac2_opts->p_srate);
snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", uac2_opts->c_srate);
ret = usb_interface_id(cfg, fn);
if (ret < 0) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
- return ret;
+ goto err_free_fu;
}
iad_desc.bFirstInterface = ret;
ret = usb_interface_id(cfg, fn);
if (ret < 0) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
- return ret;
+ goto err_free_fu;
}
std_as_out_if0_desc.bInterfaceNumber = ret;
std_as_out_if1_desc.bInterfaceNumber = ret;
ret = usb_interface_id(cfg, fn);
if (ret < 0) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
- return ret;
+ goto err_free_fu;
}
std_as_in_if0_desc.bInterfaceNumber = ret;
std_as_in_if1_desc.bInterfaceNumber = ret;
uac2->as_in_alt = 0;
}
+ if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) {
+ uac2->int_ep = usb_ep_autoconfig(gadget, &fs_ep_int_desc);
+ if (!uac2->int_ep) {
+ dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
+ ret = -ENODEV;
+ goto err_free_fu;
+ }
+
+ std_ac_if_desc.bNumEndpoints = 1;
+ }
+
/* Calculate wMaxPacketSize according to audio bandwidth */
ret = set_ep_max_packet_size(uac2_opts, &fs_epin_desc, USB_SPEED_FULL,
true);
agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
if (!agdev->out_ep) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
- return -ENODEV;
+ ret = -ENODEV;
+ goto err_free_fu;
}
if (EPOUT_FBACK_IN_EN(uac2_opts)) {
agdev->in_ep_fback = usb_ep_autoconfig(gadget,
if (!agdev->in_ep_fback) {
dev_err(dev, "%s:%d Error!\n",
__func__, __LINE__);
- return -ENODEV;
+ ret = -ENODEV;
+ goto err_free_fu;
}
}
}
agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
if (!agdev->in_ep) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
- return -ENODEV;
+ ret = -ENODEV;
+ goto err_free_fu;
}
}
agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize,
le16_to_cpu(ss_epout_desc.wMaxPacketSize));
+ // HS and SS endpoint addresses are copied from autoconfigured FS descriptors
+ hs_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress;
hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
hs_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress;
hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
ss_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress;
ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
+ ss_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress;
setup_descriptor(uac2_opts);
ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc,
ss_audio_desc);
if (ret)
- return ret;
+ goto err_free_fu;
agdev->gadget = gadget;
agdev->params.p_chmask = uac2_opts->p_chmask;
agdev->params.p_srate = uac2_opts->p_srate;
agdev->params.p_ssize = uac2_opts->p_ssize;
+ if (FUIN_EN(uac2_opts)) {
+ agdev->params.p_fu.id = USB_IN_FU_ID;
+ agdev->params.p_fu.mute_present = uac2_opts->p_mute_present;
+ agdev->params.p_fu.volume_present = uac2_opts->p_volume_present;
+ agdev->params.p_fu.volume_min = uac2_opts->p_volume_min;
+ agdev->params.p_fu.volume_max = uac2_opts->p_volume_max;
+ agdev->params.p_fu.volume_res = uac2_opts->p_volume_res;
+ }
agdev->params.c_chmask = uac2_opts->c_chmask;
agdev->params.c_srate = uac2_opts->c_srate;
agdev->params.c_ssize = uac2_opts->c_ssize;
+ if (FUOUT_EN(uac2_opts)) {
+ agdev->params.c_fu.id = USB_OUT_FU_ID;
+ agdev->params.c_fu.mute_present = uac2_opts->c_mute_present;
+ agdev->params.c_fu.volume_present = uac2_opts->c_volume_present;
+ agdev->params.c_fu.volume_min = uac2_opts->c_volume_min;
+ agdev->params.c_fu.volume_max = uac2_opts->c_volume_max;
+ agdev->params.c_fu.volume_res = uac2_opts->c_volume_res;
+ }
agdev->params.req_number = uac2_opts->req_number;
agdev->params.fb_max = uac2_opts->fb_max;
+
+ if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts))
+ agdev->notify = afunc_notify;
+
ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget");
if (ret)
goto err_free_descs;
+
return 0;
err_free_descs:
usb_free_all_descriptors(fn);
agdev->gadget = NULL;
+err_free_fu:
+ kfree(out_feature_unit_desc);
+ out_feature_unit_desc = NULL;
+ kfree(in_feature_unit_desc);
+ in_feature_unit_desc = NULL;
+ return ret;
+}
+
+static void
+afunc_notify_complete(struct usb_ep *_ep, struct usb_request *req)
+{
+ struct g_audio *agdev = req->context;
+ struct f_uac2 *uac2 = func_to_uac2(&agdev->func);
+
+ atomic_dec(&uac2->int_count);
+ kfree(req->buf);
+ usb_ep_free_request(_ep, req);
+}
+
+static int
+afunc_notify(struct g_audio *agdev, int unit_id, int cs)
+{
+ struct f_uac2 *uac2 = func_to_uac2(&agdev->func);
+ struct usb_request *req;
+ struct uac2_interrupt_data_msg *msg;
+ u16 w_index, w_value;
+ int ret;
+
+ if (!uac2->int_ep->enabled)
+ return 0;
+
+ if (atomic_inc_return(&uac2->int_count) > UAC2_DEF_INT_REQ_NUM) {
+ atomic_dec(&uac2->int_count);
+ return 0;
+ }
+
+ req = usb_ep_alloc_request(uac2->int_ep, GFP_ATOMIC);
+ if (req == NULL) {
+ ret = -ENOMEM;
+ goto err_dec_int_count;
+ }
+
+ msg = kzalloc(sizeof(*msg), GFP_ATOMIC);
+ if (msg == NULL) {
+ ret = -ENOMEM;
+ goto err_free_request;
+ }
+
+ w_index = unit_id << 8 | uac2->ac_intf;
+ w_value = cs << 8;
+
+ msg->bInfo = 0; /* Non-vendor, interface interrupt */
+ msg->bAttribute = UAC2_CS_CUR;
+ msg->wIndex = cpu_to_le16(w_index);
+ msg->wValue = cpu_to_le16(w_value);
+
+ req->length = sizeof(*msg);
+ req->buf = msg;
+ req->context = agdev;
+ req->complete = afunc_notify_complete;
+
+ ret = usb_ep_queue(uac2->int_ep, req, GFP_ATOMIC);
+
+ if (ret)
+ goto err_free_msg;
+
+ return 0;
+
+err_free_msg:
+ kfree(msg);
+err_free_request:
+ usb_ep_free_request(uac2->int_ep, req);
+err_dec_int_count:
+ atomic_dec(&uac2->int_count);
+
return ret;
}
{
struct usb_composite_dev *cdev = fn->config->cdev;
struct f_uac2 *uac2 = func_to_uac2(fn);
+ struct g_audio *agdev = func_to_g_audio(fn);
struct usb_gadget *gadget = cdev->gadget;
struct device *dev = &gadget->dev;
int ret = 0;
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
return -EINVAL;
}
+
+ /* restart interrupt endpoint */
+ if (uac2->int_ep) {
+ usb_ep_disable(uac2->int_ep);
+ config_ep_by_speed(gadget, &agdev->func, uac2->int_ep);
+ usb_ep_enable(uac2->int_ep);
+ }
+
return 0;
}
uac2->as_out_alt = 0;
u_audio_stop_capture(&uac2->g_audio);
u_audio_stop_playback(&uac2->g_audio);
+ if (uac2->int_ep)
+ usb_ep_disable(uac2->int_ep);
}
static int
{
struct usb_request *req = fn->config->cdev->req;
struct g_audio *agdev = func_to_g_audio(fn);
- struct f_uac2_opts *opts;
+ struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev);
u16 w_length = le16_to_cpu(cr->wLength);
u16 w_index = le16_to_cpu(cr->wIndex);
u16 w_value = le16_to_cpu(cr->wValue);
int value = -EOPNOTSUPP;
int p_srate, c_srate;
- opts = g_audio_to_uac2_opts(agdev);
p_srate = opts->p_srate;
c_srate = opts->c_srate;
- if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
- struct cntrl_cur_lay3 c;
- memset(&c, 0, sizeof(struct cntrl_cur_lay3));
+ if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) {
+ if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
+ struct cntrl_cur_lay3 c;
+
+ memset(&c, 0, sizeof(struct cntrl_cur_lay3));
+
+ if (entity_id == USB_IN_CLK_ID)
+ c.dCUR = cpu_to_le32(p_srate);
+ else if (entity_id == USB_OUT_CLK_ID)
+ c.dCUR = cpu_to_le32(c_srate);
+
+ value = min_t(unsigned int, w_length, sizeof(c));
+ memcpy(req->buf, &c, value);
+ } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) {
+ *(u8 *)req->buf = 1;
+ value = min_t(unsigned int, w_length, 1);
+ } else {
+ dev_err(&agdev->gadget->dev,
+ "%s:%d control_selector=%d TODO!\n",
+ __func__, __LINE__, control_selector);
+ }
+ } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+ (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+ unsigned int is_playback = 0;
- if (entity_id == USB_IN_CLK_ID)
- c.dCUR = cpu_to_le32(p_srate);
- else if (entity_id == USB_OUT_CLK_ID)
- c.dCUR = cpu_to_le32(c_srate);
+ if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+ is_playback = 1;
- value = min_t(unsigned, w_length, sizeof c);
- memcpy(req->buf, &c, value);
- } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) {
- *(u8 *)req->buf = 1;
- value = min_t(unsigned, w_length, 1);
+ if (control_selector == UAC_FU_MUTE) {
+ unsigned int mute;
+
+ u_audio_get_mute(agdev, is_playback, &mute);
+
+ *(u8 *)req->buf = mute;
+ value = min_t(unsigned int, w_length, 1);
+ } else if (control_selector == UAC_FU_VOLUME) {
+ struct cntrl_cur_lay2 c;
+ s16 volume;
+
+ memset(&c, 0, sizeof(struct cntrl_cur_lay2));
+
+ u_audio_get_volume(agdev, is_playback, &volume);
+ c.wCUR = cpu_to_le16(volume);
+
+ value = min_t(unsigned int, w_length, sizeof(c));
+ memcpy(req->buf, &c, value);
+ } else {
+ dev_err(&agdev->gadget->dev,
+ "%s:%d control_selector=%d TODO!\n",
+ __func__, __LINE__, control_selector);
+ }
} else {
dev_err(&agdev->gadget->dev,
- "%s:%d control_selector=%d TODO!\n",
- __func__, __LINE__, control_selector);
+ "%s:%d entity_id=%d control_selector=%d TODO!\n",
+ __func__, __LINE__, entity_id, control_selector);
}
return value;
{
struct usb_request *req = fn->config->cdev->req;
struct g_audio *agdev = func_to_g_audio(fn);
- struct f_uac2_opts *opts;
+ struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev);
u16 w_length = le16_to_cpu(cr->wLength);
u16 w_index = le16_to_cpu(cr->wIndex);
u16 w_value = le16_to_cpu(cr->wValue);
u8 entity_id = (w_index >> 8) & 0xff;
u8 control_selector = w_value >> 8;
- struct cntrl_range_lay3 r;
int value = -EOPNOTSUPP;
int p_srate, c_srate;
- opts = g_audio_to_uac2_opts(agdev);
p_srate = opts->p_srate;
c_srate = opts->c_srate;
- if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
- if (entity_id == USB_IN_CLK_ID)
- r.dMIN = cpu_to_le32(p_srate);
- else if (entity_id == USB_OUT_CLK_ID)
- r.dMIN = cpu_to_le32(c_srate);
- else
- return -EOPNOTSUPP;
+ if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) {
+ if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
+ struct cntrl_range_lay3 r;
+
+ if (entity_id == USB_IN_CLK_ID)
+ r.dMIN = cpu_to_le32(p_srate);
+ else if (entity_id == USB_OUT_CLK_ID)
+ r.dMIN = cpu_to_le32(c_srate);
+ else
+ return -EOPNOTSUPP;
- r.dMAX = r.dMIN;
- r.dRES = 0;
- r.wNumSubRanges = cpu_to_le16(1);
+ r.dMAX = r.dMIN;
+ r.dRES = 0;
+ r.wNumSubRanges = cpu_to_le16(1);
- value = min_t(unsigned, w_length, sizeof r);
- memcpy(req->buf, &r, value);
+ value = min_t(unsigned int, w_length, sizeof(r));
+ memcpy(req->buf, &r, value);
+ } else {
+ dev_err(&agdev->gadget->dev,
+ "%s:%d control_selector=%d TODO!\n",
+ __func__, __LINE__, control_selector);
+ }
+ } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+ (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+ unsigned int is_playback = 0;
+
+ if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+ is_playback = 1;
+
+ if (control_selector == UAC_FU_VOLUME) {
+ struct cntrl_range_lay2 r;
+ s16 max_db, min_db, res_db;
+
+ if (is_playback) {
+ max_db = opts->p_volume_max;
+ min_db = opts->p_volume_min;
+ res_db = opts->p_volume_res;
+ } else {
+ max_db = opts->c_volume_max;
+ min_db = opts->c_volume_min;
+ res_db = opts->c_volume_res;
+ }
+
+ r.wMAX = cpu_to_le16(max_db);
+ r.wMIN = cpu_to_le16(min_db);
+ r.wRES = cpu_to_le16(res_db);
+ r.wNumSubRanges = cpu_to_le16(1);
+
+ value = min_t(unsigned int, w_length, sizeof(r));
+ memcpy(req->buf, &r, value);
+ } else {
+ dev_err(&agdev->gadget->dev,
+ "%s:%d control_selector=%d TODO!\n",
+ __func__, __LINE__, control_selector);
+ }
} else {
dev_err(&agdev->gadget->dev,
- "%s:%d control_selector=%d TODO!\n",
- __func__, __LINE__, control_selector);
+ "%s:%d entity_id=%d control_selector=%d TODO!\n",
+ __func__, __LINE__, entity_id, control_selector);
}
return value;
return -EOPNOTSUPP;
}
+static void
+out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct g_audio *agdev = req->context;
+ struct usb_composite_dev *cdev = agdev->func.config->cdev;
+ struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev);
+ struct f_uac2 *uac2 = func_to_uac2(&agdev->func);
+ struct usb_ctrlrequest *cr = &uac2->setup_cr;
+ u16 w_index = le16_to_cpu(cr->wIndex);
+ u16 w_value = le16_to_cpu(cr->wValue);
+ u8 entity_id = (w_index >> 8) & 0xff;
+ u8 control_selector = w_value >> 8;
+
+ if (req->status != 0) {
+ dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status);
+ return;
+ }
+
+ if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+ (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+ unsigned int is_playback = 0;
+
+ if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID))
+ is_playback = 1;
+
+ if (control_selector == UAC_FU_MUTE) {
+ u8 mute = *(u8 *)req->buf;
+
+ u_audio_set_mute(agdev, is_playback, mute);
+
+ return;
+ } else if (control_selector == UAC_FU_VOLUME) {
+ struct cntrl_cur_lay2 *c = req->buf;
+ s16 volume;
+
+ volume = le16_to_cpu(c->wCUR);
+ u_audio_set_volume(agdev, is_playback, volume);
+
+ return;
+ } else {
+ dev_err(&agdev->gadget->dev,
+ "%s:%d control_selector=%d TODO!\n",
+ __func__, __LINE__, control_selector);
+ usb_ep_set_halt(ep);
+ }
+ }
+}
+
static int
out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
{
+ struct usb_request *req = fn->config->cdev->req;
+ struct g_audio *agdev = func_to_g_audio(fn);
+ struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev);
+ struct f_uac2 *uac2 = func_to_uac2(fn);
u16 w_length = le16_to_cpu(cr->wLength);
+ u16 w_index = le16_to_cpu(cr->wIndex);
u16 w_value = le16_to_cpu(cr->wValue);
+ u8 entity_id = (w_index >> 8) & 0xff;
u8 control_selector = w_value >> 8;
- if (control_selector == UAC2_CS_CONTROL_SAM_FREQ)
- return w_length;
+ if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) {
+ if (control_selector == UAC2_CS_CONTROL_SAM_FREQ)
+ return w_length;
+ } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) ||
+ (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) {
+ memcpy(&uac2->setup_cr, cr, sizeof(*cr));
+ req->context = agdev;
+ req->complete = out_rq_cur_complete;
+ return w_length;
+ } else {
+ dev_err(&agdev->gadget->dev,
+ "%s:%d entity_id=%d control_selector=%d TODO!\n",
+ __func__, __LINE__, entity_id, control_selector);
+ }
return -EOPNOTSUPP;
}
.release = f_uac2_attr_release,
};
-#define UAC2_ATTRIBUTE(name) \
+#define uac2_kstrtou32 kstrtou32
+#define uac2_kstrtos16 kstrtos16
+#define uac2_kstrtobool(s, base, res) kstrtobool((s), (res))
+
+static const char *u32_fmt = "%u\n";
+static const char *s16_fmt = "%hd\n";
+static const char *bool_fmt = "%u\n";
+
+#define UAC2_ATTRIBUTE(type, name) \
static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \
char *page) \
{ \
int result; \
\
mutex_lock(&opts->lock); \
- result = sprintf(page, "%u\n", opts->name); \
+ result = sprintf(page, type##_fmt, opts->name); \
mutex_unlock(&opts->lock); \
\
return result; \
{ \
struct f_uac2_opts *opts = to_f_uac2_opts(item); \
int ret; \
- u32 num; \
+ type num; \
\
mutex_lock(&opts->lock); \
if (opts->refcnt) { \
goto end; \
} \
\
- ret = kstrtou32(page, 0, &num); \
+ ret = uac2_kstrto##type(page, 0, &num); \
if (ret) \
goto end; \
\
\
CONFIGFS_ATTR(f_uac2_opts_, name)
-UAC2_ATTRIBUTE(p_chmask);
-UAC2_ATTRIBUTE(p_srate);
-UAC2_ATTRIBUTE(p_ssize);
-UAC2_ATTRIBUTE(c_chmask);
-UAC2_ATTRIBUTE(c_srate);
+UAC2_ATTRIBUTE(u32, p_chmask);
+UAC2_ATTRIBUTE(u32, p_srate);
+UAC2_ATTRIBUTE(u32, p_ssize);
+UAC2_ATTRIBUTE(u32, c_chmask);
+UAC2_ATTRIBUTE(u32, c_srate);
UAC2_ATTRIBUTE_SYNC(c_sync);
-UAC2_ATTRIBUTE(c_ssize);
-UAC2_ATTRIBUTE(req_number);
-UAC2_ATTRIBUTE(fb_max);
+UAC2_ATTRIBUTE(u32, c_ssize);
+UAC2_ATTRIBUTE(u32, req_number);
+
+UAC2_ATTRIBUTE(bool, p_mute_present);
+UAC2_ATTRIBUTE(bool, p_volume_present);
+UAC2_ATTRIBUTE(s16, p_volume_min);
+UAC2_ATTRIBUTE(s16, p_volume_max);
+UAC2_ATTRIBUTE(s16, p_volume_res);
+
+UAC2_ATTRIBUTE(bool, c_mute_present);
+UAC2_ATTRIBUTE(bool, c_volume_present);
+UAC2_ATTRIBUTE(s16, c_volume_min);
+UAC2_ATTRIBUTE(s16, c_volume_max);
+UAC2_ATTRIBUTE(s16, c_volume_res);
+UAC2_ATTRIBUTE(u32, fb_max);
static struct configfs_attribute *f_uac2_attrs[] = {
&f_uac2_opts_attr_p_chmask,
&f_uac2_opts_attr_c_sync,
&f_uac2_opts_attr_req_number,
&f_uac2_opts_attr_fb_max,
+
+ &f_uac2_opts_attr_p_mute_present,
+ &f_uac2_opts_attr_p_volume_present,
+ &f_uac2_opts_attr_p_volume_min,
+ &f_uac2_opts_attr_p_volume_max,
+ &f_uac2_opts_attr_p_volume_res,
+
+ &f_uac2_opts_attr_c_mute_present,
+ &f_uac2_opts_attr_c_volume_present,
+ &f_uac2_opts_attr_c_volume_min,
+ &f_uac2_opts_attr_c_volume_max,
+ &f_uac2_opts_attr_c_volume_res,
+
NULL,
};
opts->c_srate = UAC2_DEF_CSRATE;
opts->c_ssize = UAC2_DEF_CSSIZE;
opts->c_sync = UAC2_DEF_CSYNC;
+
+ opts->p_mute_present = UAC2_DEF_MUTE_PRESENT;
+ opts->p_volume_present = UAC2_DEF_VOLUME_PRESENT;
+ opts->p_volume_min = UAC2_DEF_MIN_DB;
+ opts->p_volume_max = UAC2_DEF_MAX_DB;
+ opts->p_volume_res = UAC2_DEF_RES_DB;
+
+ opts->c_mute_present = UAC2_DEF_MUTE_PRESENT;
+ opts->c_volume_present = UAC2_DEF_VOLUME_PRESENT;
+ opts->c_volume_min = UAC2_DEF_MIN_DB;
+ opts->c_volume_max = UAC2_DEF_MAX_DB;
+ opts->c_volume_res = UAC2_DEF_RES_DB;
+
opts->req_number = UAC2_DEF_REQ_NUM;
opts->fb_max = UAC2_DEF_FB_MAX;
return &opts->func_inst;
usb_free_all_descriptors(f);
agdev->gadget = NULL;
+
+ kfree(out_feature_unit_desc);
+ out_feature_unit_desc = NULL;
+ kfree(in_feature_unit_desc);
+ in_feature_unit_desc = NULL;
}
static struct usb_function *afunc_alloc(struct usb_function_instance *fi)
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yadwinder Singh");
MODULE_AUTHOR("Jaswinder Singh");
+MODULE_AUTHOR("Ruslan Bilovol");
projects / users / willy / linux.git / commitdiff