redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

usb: gadget: add USB3 support to the printer driver 

Add SS descriptors to support the capabilities provided by USB3 controller
drivers; unit tests run using a PLX 3380 [max transfer speed measured of 1Gbps]

This driver shall fallback to lower operating modes when the higher ones are
not available.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
hifive-unleashed-5.1
Jorge Ramirez-Ortiz 2014-11-18 15:11:54 -05:00 committed by Felipe Balbi
parent 1290a958d4
commit 74df41b40a
1 changed files with 59 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

65
drivers/usb/gadget/legacy/printer.c
View File

@ -208,6 +208,43 @@ static struct usb_descriptor_header *hs_printer_function[] = {
NULL
};
/*
* Added endpoint descriptors for 3.0 devices
*/
static struct usb_endpoint_descriptor ss_ep_in_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(1024),
};
struct usb_ss_ep_comp_descriptor ss_ep_in_comp_desc = {
.bLength = sizeof(ss_ep_in_comp_desc),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
};
static struct usb_endpoint_descriptor ss_ep_out_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = cpu_to_le16(1024),
};
struct usb_ss_ep_comp_descriptor ss_ep_out_comp_desc = {
.bLength = sizeof(ss_ep_out_comp_desc),
.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
};
static struct usb_descriptor_header *ss_printer_function[] = {
(struct usb_descriptor_header *) &intf_desc,
(struct usb_descriptor_header *) &ss_ep_in_desc,
(struct usb_descriptor_header *) &ss_ep_in_comp_desc,
(struct usb_descriptor_header *) &ss_ep_out_desc,
(struct usb_descriptor_header *) &ss_ep_out_comp_desc,
NULL
};
static struct usb_otg_descriptor otg_descriptor = {
.bLength = sizeof otg_descriptor,
.bDescriptorType = USB_DT_OTG,
@ -220,7 +257,20 @@ static const struct usb_descriptor_header *otg_desc[] = {
};
/* maxpacket and other transfer characteristics vary by speed. */
#define ep_desc(g, hs, fs) (((g)->speed == USB_SPEED_HIGH)?(hs):(fs))
static inline struct usb_endpoint_descriptor *ep_desc(struct usb_gadget *gadget,
struct usb_endpoint_descriptor *fs,
struct usb_endpoint_descriptor *hs,
struct usb_endpoint_descriptor *ss)
{
switch (gadget->speed) {
case USB_SPEED_SUPER:
return ss;
case USB_SPEED_HIGH:
return hs;
default:
return fs;
}
}
/*-------------------------------------------------------------------------*/
@ -793,11 +843,12 @@ set_printer_interface(struct printer_dev *dev)
{
int result = 0;
dev->in_ep->desc = ep_desc(dev->gadget, &hs_ep_in_desc, &fs_ep_in_desc);
dev->in_ep->desc = ep_desc(dev->gadget, &fs_ep_in_desc, &hs_ep_in_desc,
&ss_ep_in_desc);
dev->in_ep->driver_data = dev;
dev->out_ep->desc = ep_desc(dev->gadget, &hs_ep_out_desc,
&fs_ep_out_desc);
dev->out_ep->desc = ep_desc(dev->gadget, &fs_ep_out_desc,
&hs_ep_out_desc, &ss_ep_out_desc);
dev->out_ep->driver_data = dev;
result = usb_ep_enable(dev->in_ep);
@ -1016,9 +1067,11 @@ autoconf_fail:
/* assumes that all endpoints are dual-speed */
hs_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress;
hs_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress;
ss_ep_in_desc.bEndpointAddress = fs_ep_in_desc.bEndpointAddress;
ss_ep_out_desc.bEndpointAddress = fs_ep_out_desc.bEndpointAddress;
ret = usb_assign_descriptors(f, fs_printer_function,
hs_printer_function, NULL);
hs_printer_function, ss_printer_function);
if (ret)
return ret;
@ -1253,7 +1306,7 @@ static __refdata struct usb_composite_driver printer_driver = {
.name = shortname,
.dev = &device_desc,
.strings = dev_strings,
.max_speed = USB_SPEED_HIGH,
.max_speed = USB_SPEED_SUPER,
.bind = printer_bind,
.unbind = printer_unbind,
};