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Subject[PATCH] usb: gadget: f_midi: add super speed support
Date
Add super speed descriptors for f_midi.

Signed-off-by: Badhri Jagan Sridharan <Badhri@google.com>
---
drivers/usb/gadget/function/f_midi.c | 42 +++++++++++++++++++++++++++++++++---
1 file changed, 39 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
index a5719f271bf0..e875f47bb4eb 100644
--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -163,6 +163,13 @@ static struct usb_endpoint_descriptor bulk_out_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};

+static struct usb_ss_ep_comp_descriptor bulk_out_ss_comp_desc = {
+ .bLength = sizeof(bulk_out_ss_comp_desc),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+};
+
/* B.5.2 Class-specific MS Bulk OUT Endpoint Descriptor */
static struct usb_ms_endpoint_descriptor_16 ms_out_desc = {
/* .bLength = DYNAMIC */
@@ -180,6 +187,13 @@ static struct usb_endpoint_descriptor bulk_in_desc = {
.bmAttributes = USB_ENDPOINT_XFER_BULK,
};

+static struct usb_ss_ep_comp_descriptor bulk_in_ss_comp_desc = {
+ .bLength = sizeof(bulk_in_ss_comp_desc),
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ /* .bMaxBurst = 0, */
+ /* .bmAttributes = 0, */
+};
+
/* B.6.2 Class-specific MS Bulk IN Endpoint Descriptor */
static struct usb_ms_endpoint_descriptor_16 ms_in_desc = {
/* .bLength = DYNAMIC */
@@ -853,7 +867,7 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
struct usb_composite_dev *cdev = c->cdev;
struct f_midi *midi = func_to_midi(f);
struct usb_string *us;
- int status, n, jack = 1, i = 0;
+ int status, n, jack = 1, i = 0, endpoint_descriptor_index = 0;

midi->gadget = cdev->gadget;
tasklet_init(&midi->tasklet, f_midi_in_tasklet, (unsigned long) midi);
@@ -895,7 +909,7 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
goto fail;

/* allocate temporary function list */
- midi_function = kcalloc((MAX_PORTS * 4) + 9, sizeof(*midi_function),
+ midi_function = kcalloc((MAX_PORTS * 4) + 11, sizeof(*midi_function),
GFP_KERNEL);
if (!midi_function) {
status = -ENOMEM;
@@ -985,6 +999,7 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
ms_in_desc.bNumEmbMIDIJack = midi->out_ports;

/* ... and add them to the list */
+ endpoint_descriptor_index = i;
midi_function[i++] = (struct usb_descriptor_header *) &bulk_out_desc;
midi_function[i++] = (struct usb_descriptor_header *) &ms_out_desc;
midi_function[i++] = (struct usb_descriptor_header *) &bulk_in_desc;
@@ -1009,13 +1024,34 @@ static int f_midi_bind(struct usb_configuration *c, struct usb_function *f)
goto fail_f_midi;
}

+ if (gadget_is_superspeed(c->cdev->gadget)) {
+ bulk_in_desc.wMaxPacketSize = cpu_to_le16(1024);
+ bulk_out_desc.wMaxPacketSize = cpu_to_le16(1024);
+ i = endpoint_descriptor_index;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &bulk_out_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &bulk_out_ss_comp_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &ms_out_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &bulk_in_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &bulk_in_ss_comp_desc;
+ midi_function[i++] = (struct usb_descriptor_header *)
+ &ms_in_desc;
+ f->ss_descriptors = usb_copy_descriptors(midi_function);
+ if (!f->ss_descriptors)
+ goto fail_f_midi;
+ }
+
kfree(midi_function);

return 0;

fail_f_midi:
kfree(midi_function);
- usb_free_descriptors(f->hs_descriptors);
+ usb_free_all_descriptors(f);
fail:
f_midi_unregister_card(midi);
fail_register:
--
2.14.0.434.g98096fd7a8-goog
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