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usb: f_uac2: adds support for SS and SSP
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Patch adds support of SS and SSP speed.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Link: https://lore.kernel.org/r/20210310105216.38202-1-pawell@gli-login.cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@pawellcdns @gregkh
pawellcdns authored and gregkh committed Mar 23, 2021
1 parent fb9b31e commit f8cb3d5
Showing 1 changed file with 161 additions and 67 deletions.
228 changes: 161 additions & 67 deletions drivers/usb/gadget/function/f_uac2.c
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Original file line number Diff line number Diff line change
Expand Up @@ -284,6 +284,24 @@ static struct usb_endpoint_descriptor hs_epout_desc = {
.bInterval = 4,
};

static struct usb_endpoint_descriptor ss_epout_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,

.bEndpointAddress = USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
/* .wMaxPacketSize = DYNAMIC */
.bInterval = 4,
};

static struct usb_ss_ep_comp_descriptor ss_epout_desc_comp = {
.bLength = sizeof(ss_epout_desc_comp),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
.bMaxBurst = 0,
.bmAttributes = 0,
/* wBytesPerInterval = DYNAMIC */
};

/* CS AS ISO OUT Endpoint */
static struct uac2_iso_endpoint_descriptor as_iso_out_desc = {
.bLength = sizeof as_iso_out_desc,
Expand Down Expand Up @@ -361,6 +379,24 @@ static struct usb_endpoint_descriptor hs_epin_desc = {
.bInterval = 4,
};

static struct usb_endpoint_descriptor ss_epin_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,

.bEndpointAddress = USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC,
/* .wMaxPacketSize = DYNAMIC */
.bInterval = 4,
};

static struct usb_ss_ep_comp_descriptor ss_epin_desc_comp = {
.bLength = sizeof(ss_epin_desc_comp),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
.bMaxBurst = 0,
.bmAttributes = 0,
/* wBytesPerInterval = DYNAMIC */
};

/* CS AS ISO IN Endpoint */
static struct uac2_iso_endpoint_descriptor as_iso_in_desc = {
.bLength = sizeof as_iso_in_desc,
Expand Down Expand Up @@ -433,6 +469,38 @@ static struct usb_descriptor_header *hs_audio_desc[] = {
NULL,
};

static struct usb_descriptor_header *ss_audio_desc[] = {
(struct usb_descriptor_header *)&iad_desc,
(struct usb_descriptor_header *)&std_ac_if_desc,

(struct usb_descriptor_header *)&ac_hdr_desc,
(struct usb_descriptor_header *)&in_clk_src_desc,
(struct usb_descriptor_header *)&out_clk_src_desc,
(struct usb_descriptor_header *)&usb_out_it_desc,
(struct usb_descriptor_header *)&io_in_it_desc,
(struct usb_descriptor_header *)&usb_in_ot_desc,
(struct usb_descriptor_header *)&io_out_ot_desc,

(struct usb_descriptor_header *)&std_as_out_if0_desc,
(struct usb_descriptor_header *)&std_as_out_if1_desc,

(struct usb_descriptor_header *)&as_out_hdr_desc,
(struct usb_descriptor_header *)&as_out_fmt1_desc,
(struct usb_descriptor_header *)&ss_epout_desc,
(struct usb_descriptor_header *)&ss_epout_desc_comp,
(struct usb_descriptor_header *)&as_iso_out_desc,

(struct usb_descriptor_header *)&std_as_in_if0_desc,
(struct usb_descriptor_header *)&std_as_in_if1_desc,

(struct usb_descriptor_header *)&as_in_hdr_desc,
(struct usb_descriptor_header *)&as_in_fmt1_desc,
(struct usb_descriptor_header *)&ss_epin_desc,
(struct usb_descriptor_header *)&ss_epin_desc_comp,
(struct usb_descriptor_header *)&as_iso_in_desc,
NULL,
};

struct cntrl_cur_lay3 {
__le32 dCUR;
};
Expand All @@ -459,6 +527,7 @@ static int set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts,
break;

case USB_SPEED_HIGH:
case USB_SPEED_SUPER:
max_size_ep = 1024;
factor = 8000;
break;
Expand Down Expand Up @@ -488,6 +557,72 @@ static int set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts,
/* Use macro to overcome line length limitation */
#define USBDHDR(p) (struct usb_descriptor_header *)(p)

static void setup_headers(struct f_uac2_opts *opts,
struct usb_descriptor_header **headers,
enum usb_device_speed speed)
{
struct usb_ss_ep_comp_descriptor *epout_desc_comp = NULL;
struct usb_ss_ep_comp_descriptor *epin_desc_comp = NULL;
struct usb_endpoint_descriptor *epout_desc;
struct usb_endpoint_descriptor *epin_desc;
int i;

switch (speed) {
case USB_SPEED_FULL:
epout_desc = &fs_epout_desc;
epin_desc = &fs_epin_desc;
break;
case USB_SPEED_HIGH:
epout_desc = &hs_epout_desc;
epin_desc = &hs_epin_desc;
break;
default:
epout_desc = &ss_epout_desc;
epin_desc = &ss_epin_desc;
epout_desc_comp = &ss_epout_desc_comp;
epin_desc_comp = &ss_epin_desc_comp;
}

i = 0;
headers[i++] = USBDHDR(&iad_desc);
headers[i++] = USBDHDR(&std_ac_if_desc);
headers[i++] = USBDHDR(&ac_hdr_desc);
if (EPIN_EN(opts))
headers[i++] = USBDHDR(&in_clk_src_desc);
if (EPOUT_EN(opts)) {
headers[i++] = USBDHDR(&out_clk_src_desc);
headers[i++] = USBDHDR(&usb_out_it_desc);
}
if (EPIN_EN(opts)) {
headers[i++] = USBDHDR(&io_in_it_desc);
headers[i++] = USBDHDR(&usb_in_ot_desc);
}
if (EPOUT_EN(opts)) {
headers[i++] = USBDHDR(&io_out_ot_desc);
headers[i++] = USBDHDR(&std_as_out_if0_desc);
headers[i++] = USBDHDR(&std_as_out_if1_desc);
headers[i++] = USBDHDR(&as_out_hdr_desc);
headers[i++] = USBDHDR(&as_out_fmt1_desc);
headers[i++] = USBDHDR(epout_desc);
if (epout_desc_comp)
headers[i++] = USBDHDR(epout_desc_comp);

headers[i++] = USBDHDR(&as_iso_out_desc);
}
if (EPIN_EN(opts)) {
headers[i++] = USBDHDR(&std_as_in_if0_desc);
headers[i++] = USBDHDR(&std_as_in_if1_desc);
headers[i++] = USBDHDR(&as_in_hdr_desc);
headers[i++] = USBDHDR(&as_in_fmt1_desc);
headers[i++] = USBDHDR(epin_desc);
if (epin_desc_comp)
headers[i++] = USBDHDR(epin_desc_comp);

headers[i++] = USBDHDR(&as_iso_in_desc);
}
headers[i] = NULL;
}

static void setup_descriptor(struct f_uac2_opts *opts)
{
/* patch descriptors */
Expand Down Expand Up @@ -537,71 +672,9 @@ static void setup_descriptor(struct f_uac2_opts *opts)
iad_desc.bInterfaceCount++;
}

i = 0;
fs_audio_desc[i++] = USBDHDR(&iad_desc);
fs_audio_desc[i++] = USBDHDR(&std_ac_if_desc);
fs_audio_desc[i++] = USBDHDR(&ac_hdr_desc);
if (EPIN_EN(opts))
fs_audio_desc[i++] = USBDHDR(&in_clk_src_desc);
if (EPOUT_EN(opts)) {
fs_audio_desc[i++] = USBDHDR(&out_clk_src_desc);
fs_audio_desc[i++] = USBDHDR(&usb_out_it_desc);
}
if (EPIN_EN(opts)) {
fs_audio_desc[i++] = USBDHDR(&io_in_it_desc);
fs_audio_desc[i++] = USBDHDR(&usb_in_ot_desc);
}
if (EPOUT_EN(opts)) {
fs_audio_desc[i++] = USBDHDR(&io_out_ot_desc);
fs_audio_desc[i++] = USBDHDR(&std_as_out_if0_desc);
fs_audio_desc[i++] = USBDHDR(&std_as_out_if1_desc);
fs_audio_desc[i++] = USBDHDR(&as_out_hdr_desc);
fs_audio_desc[i++] = USBDHDR(&as_out_fmt1_desc);
fs_audio_desc[i++] = USBDHDR(&fs_epout_desc);
fs_audio_desc[i++] = USBDHDR(&as_iso_out_desc);
}
if (EPIN_EN(opts)) {
fs_audio_desc[i++] = USBDHDR(&std_as_in_if0_desc);
fs_audio_desc[i++] = USBDHDR(&std_as_in_if1_desc);
fs_audio_desc[i++] = USBDHDR(&as_in_hdr_desc);
fs_audio_desc[i++] = USBDHDR(&as_in_fmt1_desc);
fs_audio_desc[i++] = USBDHDR(&fs_epin_desc);
fs_audio_desc[i++] = USBDHDR(&as_iso_in_desc);
}
fs_audio_desc[i] = NULL;

i = 0;
hs_audio_desc[i++] = USBDHDR(&iad_desc);
hs_audio_desc[i++] = USBDHDR(&std_ac_if_desc);
hs_audio_desc[i++] = USBDHDR(&ac_hdr_desc);
if (EPIN_EN(opts))
hs_audio_desc[i++] = USBDHDR(&in_clk_src_desc);
if (EPOUT_EN(opts)) {
hs_audio_desc[i++] = USBDHDR(&out_clk_src_desc);
hs_audio_desc[i++] = USBDHDR(&usb_out_it_desc);
}
if (EPIN_EN(opts)) {
hs_audio_desc[i++] = USBDHDR(&io_in_it_desc);
hs_audio_desc[i++] = USBDHDR(&usb_in_ot_desc);
}
if (EPOUT_EN(opts)) {
hs_audio_desc[i++] = USBDHDR(&io_out_ot_desc);
hs_audio_desc[i++] = USBDHDR(&std_as_out_if0_desc);
hs_audio_desc[i++] = USBDHDR(&std_as_out_if1_desc);
hs_audio_desc[i++] = USBDHDR(&as_out_hdr_desc);
hs_audio_desc[i++] = USBDHDR(&as_out_fmt1_desc);
hs_audio_desc[i++] = USBDHDR(&hs_epout_desc);
hs_audio_desc[i++] = USBDHDR(&as_iso_out_desc);
}
if (EPIN_EN(opts)) {
hs_audio_desc[i++] = USBDHDR(&std_as_in_if0_desc);
hs_audio_desc[i++] = USBDHDR(&std_as_in_if1_desc);
hs_audio_desc[i++] = USBDHDR(&as_in_hdr_desc);
hs_audio_desc[i++] = USBDHDR(&as_in_fmt1_desc);
hs_audio_desc[i++] = USBDHDR(&hs_epin_desc);
hs_audio_desc[i++] = USBDHDR(&as_iso_in_desc);
}
hs_audio_desc[i] = NULL;
setup_headers(opts, fs_audio_desc, USB_SPEED_FULL);
setup_headers(opts, hs_audio_desc, USB_SPEED_HIGH);
setup_headers(opts, ss_audio_desc, USB_SPEED_SUPER);
}

static int
Expand Down Expand Up @@ -716,6 +789,20 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
return ret;
}

ret = set_ep_max_packet_size(uac2_opts, &ss_epin_desc, USB_SPEED_SUPER,
true);
if (ret < 0) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
return ret;
}

ret = set_ep_max_packet_size(uac2_opts, &ss_epout_desc, USB_SPEED_SUPER,
false);
if (ret < 0) {
dev_err(dev, "%s:%d Error!\n", __func__, __LINE__);
return ret;
}

if (EPOUT_EN(uac2_opts)) {
agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
if (!agdev->out_ep) {
Expand All @@ -739,13 +826,20 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
le16_to_cpu(fs_epout_desc.wMaxPacketSize),
le16_to_cpu(hs_epout_desc.wMaxPacketSize));

agdev->in_ep_maxpsize = max_t(u16, agdev->in_ep_maxpsize,
le16_to_cpu(ss_epin_desc.wMaxPacketSize));
agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize,
le16_to_cpu(ss_epout_desc.wMaxPacketSize));

hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;
ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress;
ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress;

setup_descriptor(uac2_opts);

ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, NULL,
NULL);
ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc,
ss_audio_desc);
if (ret)
return ret;

Expand Down

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