Target: make JZ2440 as an USB mouse.
BootLoader: u-boot-2013.7
Kernel : linux-3.2.50
Hardware : JZ2440
How to build:
1. you should enable udc driver in your kernel;
2. cp the jz2440_mouse.c and Makefile into drivers/usb/gadget(Note: you should save you original Makefile)
3. make, and it will generate jz2440_mouse.ko
4. use arm-linux-gcc -o jz2440_mouse_test jz2440_mouse_test.c to compile the test application
How to install:
1. copy the jz2440_mouse.ko into your development board;
2. execute insmod jz2440_mouse.ko
3. execute ./jz2440_mouse_test &
How to uninstall:
1. rmmod jz2440_mouse
Note: you should add platform devices in arch/arm/mach-s3c2440/mach-smdk2440.c
#include <linux/usb/g_hid.h>
static struct hidg_func_descriptor jzmouse_descriptor = {
.subclass = 0, /* No subclass */
.protocol = 2, /* mouse */
.report_length = 8,
.report_desc_length = 52,
.report_desc = {
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
0x09, 0x02, /* USAGE (Mouse) */
0xa1, 0x01, /* COLLECTION (Application) */
0x09, 0x01, /* USAGE (Pointer) */
0xa1, 0x00, /* COLLECTION (Physical) */
0x05, 0x09, /* USAGE_PAGE (Button) */
0x19, 0x01, /* USAGE_MINIMUM (Button 1) */
0x29, 0x03, /* USAGE_MAXIMUM (Button 3) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
0x95, 0x03, /* REPORT_COUNT (3) */
0x75, 0x01, /* REPORT_SIZE (1) */
0x81, 0x02, /* INPUT (DataVarAbs) */
0x95, 0x01, /* REPORT_COUNT (1) */
0x75, 0x05, /* REPORT_SIZE (5) */
0x81, 0x03, /* INPUT (CnstVarAbs) */
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
0x09, 0x30, /* USAGE (X) */
0x09, 0x31, /* USAGE (Y) */
0x09, 0x38, /* USAGE (Wheel) */
0x15, 0x81, /* LOGICAL_MINIMUM (-127) */
0x25, 0x7f, /* LOGICAL_MAXIMUM (127) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x95, 0x03, /* REPORT_COUNT (3) */
0x81, 0x06, /* INPUT (DataVarRel) */
0xc0, /* END_COLLECTION */
0xc0 /* END_COLLECTION */
}
};
static struct platform_device smdk2440_device_mouse = {
.name = "jz_mouseg",
.id = 0,
.num_resources = 0,
.resource = 0,
.dev.platform_data = &jzmouse_descriptor,
};
static struct platform_device *smdk2440_devices[] __initdata = {
&s3c_device_ohci,
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c0,
&s3c_device_iis,
&smdk2440_device_eth,
&smdk2440_device_mouse,
&s3c_device_usbgadget,
};