Dear NXP Support,
I am using i.MX6q that is installed kernel 3.10.17.
I want to send data using gadgets endpoint. My endpoints:
# ls -l /dev/gadget/
total 0
-rw------- 1 root root 0 Jan 1 00:00 ci_hdrc_imx
-rw------- 1 root root 0 Jan 1 01:23 ep1in
-rw------- 1 root root 0 Jan 1 01:23 ep1out
-rw------- 1 root root 0 Jan 1 01:23 ep2in
-rw------- 1 root root 0 Jan 1 01:23 ep2out
-rw------- 1 root root 0 Jan 1 01:23 ep3in
-rw------- 1 root root 0 Jan 1 01:23 ep3out
-rw------- 1 root root 0 Jan 1 01:23 ep4in
-rw------- 1 root root 0 Jan 1 01:23 ep4out
-rw------- 1 root root 0 Jan 1 01:23 ep5in
-rw------- 1 root root 0 Jan 1 01:23 ep5out
-rw------- 1 root root 0 Jan 1 01:23 ep6in
-rw------- 1 root root 0 Jan 1 01:23 ep6out
-rw------- 1 root root 0 Jan 1 01:23 ep7in
-rw------- 1 root root 0 Jan 1 01:23 ep7out
I am using example in: http://www.linux-usb.org/gadget/usb.c (and also need:usbstring.c-- http://www.linux-usb.org/gadget/usbstring.c and usbstring.h---http://www.linux-usb.org/gadget/usbstring.h).
I already added init code for "ci_hdrc_imx" at autoconfig() in usb.c:
else if (stat (DEVNAME = "ci_hdrc_imx", &statb) == 0)
{
HIGHSPEED = 1;
device_desc.bcdDevice = __constant_cpu_to_le16 (0x0109);
fs_source_desc.bEndpointAddress
= hs_source_desc.bEndpointAddress
= USB_DIR_IN | 7;
EP_IN_NAME = "ep7in";
fs_sink_desc.bEndpointAddress
= hs_sink_desc.bEndpointAddress
= USB_DIR_OUT | 2;
EP_OUT_NAME = "ep2out";
source_sink_intf.bNumEndpoints = 3;
fs_status_desc.bEndpointAddress
= hs_status_desc.bEndpointAddress
= USB_DIR_IN | 3;
EP_STATUS_NAME = "ep3in";
}
However, when I run the example to send data, the write()(status = write (source_fd, buf, len);) method in simple_source_thread() return negative number. I don't know why.
The example already opened "source_fd" successfully.
Can somebody give me some suggestions? Thanks you in advance.
Best Regards,
Cuong.
