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https://github.com/torvalds/linux
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usb: gadget: f_uac2: disable IN/OUT ep if unused
Via p_chmask/c_chmask the user can define whether uac2 shall support playback and/or capture. This has only effect on the created ALSA device, but not on the USB descriptor. This patch adds playback/capture descriptors dependent on that parameter. Signed-off-by: Andreas Pape <apape@de.adit-jv.com> Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Andreas Pape
Felipe Balbi
parent
0a55187a1e
commit
3fa4eaa6c0
1 changed files with 172 additions and 44 deletions
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@ -22,12 +22,8 @@
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* controlled by two clock sources :
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* CLK_5 := c_srate, and CLK_6 := p_srate
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*/
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#define USB_OUT_IT_ID 1
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#define IO_IN_IT_ID 2
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#define IO_OUT_OT_ID 3
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#define USB_IN_OT_ID 4
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#define USB_OUT_CLK_ID 5
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#define USB_IN_CLK_ID 6
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#define USB_OUT_CLK_ID (out_clk_src_desc.bClockID)
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#define USB_IN_CLK_ID (in_clk_src_desc.bClockID)
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#define CONTROL_ABSENT 0
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#define CONTROL_RDONLY 1
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@ -43,6 +39,9 @@
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#define UNFLW_CTRL 8
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#define OVFLW_CTRL 10
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#define EPIN_EN(_opts) ((_opts)->p_chmask != 0)
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#define EPOUT_EN(_opts) ((_opts)->c_chmask != 0)
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struct f_uac2 {
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struct g_audio g_audio;
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u8 ac_intf, as_in_intf, as_out_intf;
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@ -135,7 +134,7 @@ static struct uac_clock_source_descriptor in_clk_src_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC2_CLOCK_SOURCE,
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.bClockID = USB_IN_CLK_ID,
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/* .bClockID = DYNAMIC */
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.bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
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.bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL),
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.bAssocTerminal = 0,
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@ -147,7 +146,7 @@ static struct uac_clock_source_descriptor out_clk_src_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC2_CLOCK_SOURCE,
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.bClockID = USB_OUT_CLK_ID,
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/* .bClockID = DYNAMIC */
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.bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED,
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.bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL),
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.bAssocTerminal = 0,
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@ -159,10 +158,10 @@ static struct uac2_input_terminal_descriptor usb_out_it_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_INPUT_TERMINAL,
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.bTerminalID = USB_OUT_IT_ID,
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/* .bTerminalID = DYNAMIC */
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.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
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.bAssocTerminal = 0,
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.bCSourceID = USB_OUT_CLK_ID,
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/* .bCSourceID = DYNAMIC */
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.iChannelNames = 0,
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.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
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};
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@ -173,10 +172,10 @@ static struct uac2_input_terminal_descriptor io_in_it_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_INPUT_TERMINAL,
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.bTerminalID = IO_IN_IT_ID,
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/* .bTerminalID = DYNAMIC */
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.wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_UNDEFINED),
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.bAssocTerminal = 0,
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.bCSourceID = USB_IN_CLK_ID,
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/* .bCSourceID = DYNAMIC */
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.iChannelNames = 0,
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.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
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};
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@ -187,11 +186,11 @@ static struct uac2_output_terminal_descriptor usb_in_ot_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
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.bTerminalID = USB_IN_OT_ID,
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/* .bTerminalID = DYNAMIC */
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.wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING),
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.bAssocTerminal = 0,
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.bSourceID = IO_IN_IT_ID,
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.bCSourceID = USB_IN_CLK_ID,
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/* .bSourceID = DYNAMIC */
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/* .bCSourceID = DYNAMIC */
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.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
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};
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@ -201,11 +200,11 @@ static struct uac2_output_terminal_descriptor io_out_ot_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_OUTPUT_TERMINAL,
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.bTerminalID = IO_OUT_OT_ID,
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/* .bTerminalID = DYNAMIC */
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.wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_UNDEFINED),
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.bAssocTerminal = 0,
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.bSourceID = USB_OUT_IT_ID,
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.bCSourceID = USB_OUT_CLK_ID,
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/* .bSourceID = DYNAMIC */
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/* .bCSourceID = DYNAMIC */
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.bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL),
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};
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@ -253,7 +252,7 @@ static struct uac2_as_header_descriptor as_out_hdr_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_AS_GENERAL,
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.bTerminalLink = USB_OUT_IT_ID,
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/* .bTerminalLink = DYNAMIC */
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.bmControls = 0,
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.bFormatType = UAC_FORMAT_TYPE_I,
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.bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
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@ -330,7 +329,7 @@ static struct uac2_as_header_descriptor as_in_hdr_desc = {
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubtype = UAC_AS_GENERAL,
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.bTerminalLink = USB_IN_OT_ID,
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/* .bTerminalLink = DYNAMIC */
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.bmControls = 0,
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.bFormatType = UAC_FORMAT_TYPE_I,
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.bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM),
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@ -471,6 +470,125 @@ static void set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts,
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le16_to_cpu(ep_desc->wMaxPacketSize)));
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}
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/* Use macro to overcome line length limitation */
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#define USBDHDR(p) (struct usb_descriptor_header *)(p)
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static void setup_descriptor(struct f_uac2_opts *opts)
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{
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/* patch descriptors */
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int i = 1; /* ID's start with 1 */
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if (EPOUT_EN(opts))
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usb_out_it_desc.bTerminalID = i++;
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if (EPIN_EN(opts))
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io_in_it_desc.bTerminalID = i++;
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if (EPOUT_EN(opts))
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io_out_ot_desc.bTerminalID = i++;
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if (EPIN_EN(opts))
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usb_in_ot_desc.bTerminalID = i++;
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if (EPOUT_EN(opts))
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out_clk_src_desc.bClockID = i++;
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if (EPIN_EN(opts))
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in_clk_src_desc.bClockID = i++;
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usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID;
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usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID;
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usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID;
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io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID;
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io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID;
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io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID;
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as_out_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID;
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as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID;
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iad_desc.bInterfaceCount = 1;
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ac_hdr_desc.wTotalLength = 0;
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if (EPIN_EN(opts)) {
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u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength);
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len += sizeof(in_clk_src_desc);
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len += sizeof(usb_in_ot_desc);
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len += sizeof(io_in_it_desc);
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ac_hdr_desc.wTotalLength = cpu_to_le16(len);
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iad_desc.bInterfaceCount++;
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}
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if (EPOUT_EN(opts)) {
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u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength);
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len += sizeof(out_clk_src_desc);
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len += sizeof(usb_out_it_desc);
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len += sizeof(io_out_ot_desc);
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ac_hdr_desc.wTotalLength = cpu_to_le16(len);
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iad_desc.bInterfaceCount++;
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}
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i = 0;
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fs_audio_desc[i++] = USBDHDR(&iad_desc);
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fs_audio_desc[i++] = USBDHDR(&std_ac_if_desc);
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fs_audio_desc[i++] = USBDHDR(&ac_hdr_desc);
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if (EPIN_EN(opts))
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fs_audio_desc[i++] = USBDHDR(&in_clk_src_desc);
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if (EPOUT_EN(opts)) {
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fs_audio_desc[i++] = USBDHDR(&out_clk_src_desc);
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fs_audio_desc[i++] = USBDHDR(&usb_out_it_desc);
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}
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if (EPIN_EN(opts)) {
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fs_audio_desc[i++] = USBDHDR(&io_in_it_desc);
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fs_audio_desc[i++] = USBDHDR(&usb_in_ot_desc);
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}
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if (EPOUT_EN(opts)) {
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fs_audio_desc[i++] = USBDHDR(&io_out_ot_desc);
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fs_audio_desc[i++] = USBDHDR(&std_as_out_if0_desc);
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fs_audio_desc[i++] = USBDHDR(&std_as_out_if1_desc);
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fs_audio_desc[i++] = USBDHDR(&as_out_hdr_desc);
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fs_audio_desc[i++] = USBDHDR(&as_out_fmt1_desc);
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fs_audio_desc[i++] = USBDHDR(&fs_epout_desc);
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fs_audio_desc[i++] = USBDHDR(&as_iso_out_desc);
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}
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if (EPIN_EN(opts)) {
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fs_audio_desc[i++] = USBDHDR(&std_as_in_if0_desc);
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fs_audio_desc[i++] = USBDHDR(&std_as_in_if1_desc);
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fs_audio_desc[i++] = USBDHDR(&as_in_hdr_desc);
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fs_audio_desc[i++] = USBDHDR(&as_in_fmt1_desc);
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fs_audio_desc[i++] = USBDHDR(&fs_epin_desc);
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fs_audio_desc[i++] = USBDHDR(&as_iso_in_desc);
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}
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fs_audio_desc[i] = NULL;
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i = 0;
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hs_audio_desc[i++] = USBDHDR(&iad_desc);
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hs_audio_desc[i++] = USBDHDR(&std_ac_if_desc);
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hs_audio_desc[i++] = USBDHDR(&ac_hdr_desc);
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if (EPIN_EN(opts))
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hs_audio_desc[i++] = USBDHDR(&in_clk_src_desc);
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if (EPOUT_EN(opts)) {
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hs_audio_desc[i++] = USBDHDR(&out_clk_src_desc);
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hs_audio_desc[i++] = USBDHDR(&usb_out_it_desc);
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}
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if (EPIN_EN(opts)) {
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hs_audio_desc[i++] = USBDHDR(&io_in_it_desc);
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hs_audio_desc[i++] = USBDHDR(&usb_in_ot_desc);
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}
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if (EPOUT_EN(opts)) {
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hs_audio_desc[i++] = USBDHDR(&io_out_ot_desc);
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hs_audio_desc[i++] = USBDHDR(&std_as_out_if0_desc);
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hs_audio_desc[i++] = USBDHDR(&std_as_out_if1_desc);
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hs_audio_desc[i++] = USBDHDR(&as_out_hdr_desc);
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hs_audio_desc[i++] = USBDHDR(&as_out_fmt1_desc);
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hs_audio_desc[i++] = USBDHDR(&hs_epout_desc);
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hs_audio_desc[i++] = USBDHDR(&as_iso_out_desc);
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}
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if (EPIN_EN(opts)) {
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hs_audio_desc[i++] = USBDHDR(&std_as_in_if0_desc);
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hs_audio_desc[i++] = USBDHDR(&std_as_in_if1_desc);
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hs_audio_desc[i++] = USBDHDR(&as_in_hdr_desc);
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hs_audio_desc[i++] = USBDHDR(&as_in_fmt1_desc);
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hs_audio_desc[i++] = USBDHDR(&hs_epin_desc);
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hs_audio_desc[i++] = USBDHDR(&as_iso_in_desc);
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}
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hs_audio_desc[i] = NULL;
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}
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static int
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afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
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{
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@ -530,25 +648,29 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
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uac2->ac_intf = ret;
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uac2->ac_alt = 0;
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ret = usb_interface_id(cfg, fn);
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if (ret < 0) {
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dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
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return ret;
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if (EPOUT_EN(uac2_opts)) {
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ret = usb_interface_id(cfg, fn);
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if (ret < 0) {
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dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
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return ret;
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}
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std_as_out_if0_desc.bInterfaceNumber = ret;
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std_as_out_if1_desc.bInterfaceNumber = ret;
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uac2->as_out_intf = ret;
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uac2->as_out_alt = 0;
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}
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std_as_out_if0_desc.bInterfaceNumber = ret;
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std_as_out_if1_desc.bInterfaceNumber = ret;
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uac2->as_out_intf = ret;
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uac2->as_out_alt = 0;
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ret = usb_interface_id(cfg, fn);
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if (ret < 0) {
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dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
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return ret;
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if (EPIN_EN(uac2_opts)) {
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ret = usb_interface_id(cfg, fn);
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if (ret < 0) {
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dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
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return ret;
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}
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std_as_in_if0_desc.bInterfaceNumber = ret;
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std_as_in_if1_desc.bInterfaceNumber = ret;
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uac2->as_in_intf = ret;
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uac2->as_in_alt = 0;
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}
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std_as_in_if0_desc.bInterfaceNumber = ret;
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std_as_in_if1_desc.bInterfaceNumber = ret;
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uac2->as_in_intf = ret;
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uac2->as_in_alt = 0;
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/* Calculate wMaxPacketSize according to audio bandwidth */
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set_ep_max_packet_size(uac2_opts, &fs_epin_desc, 1000, true);
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@ -556,16 +678,20 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
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set_ep_max_packet_size(uac2_opts, &hs_epin_desc, 8000, true);
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set_ep_max_packet_size(uac2_opts, &hs_epout_desc, 8000, false);
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agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
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if (!agdev->out_ep) {
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dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
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return -ENODEV;
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if (EPOUT_EN(uac2_opts)) {
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agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
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if (!agdev->out_ep) {
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dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
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return -ENODEV;
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}
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}
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agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
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if (!agdev->in_ep) {
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dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
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return -ENODEV;
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if (EPIN_EN(uac2_opts)) {
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agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc);
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if (!agdev->in_ep) {
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dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
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return -ENODEV;
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}
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}
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agdev->in_ep_maxpsize = max_t(u16,
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@ -578,6 +704,8 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
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hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
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hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
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setup_descriptor(uac2_opts);
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ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, NULL,
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NULL);
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if (ret)
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