|
最近在做PC和開(kāi)發(fā)板的USB通訊，借鑒了內(nèi)核中的代碼zero.c和usb-skeieton.c,實(shí)現(xiàn)了linux環(huán)境下USB的通訊，在此做點(diǎn)記錄，如有疑問(wèn)，請(qǐng)發(fā)郵箱：lutao614@126.com
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "g_zero.h"
#include "gadget_chips.h"
#include "composite.c"
#include "usbstring.c"
#include "config.c"
#include "epautoconf.c"
#include "f_sink.c"
#define DRIVER_VERSION "Gestton 2013"
static const char longname[] = "Gestton USB Device";
unsigned buflen = 4096;
static int loopdefault = 0;
#define DRIVER_VENDOR_NUM 0x03EB
#define DRIVER_PRODUCT_NUM 0x6119
#define DEFAULT_AUTORESUME 0
unsigned autoresume = DEFAULT_AUTORESUME;
static struct usb_device_descriptor device_desc = {
.bLength = sizeof device_desc,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = cpu_to_le16(0x0200),
.bDeviceClass = USB_CLASS_VENDOR_SPEC,
.idVendor = cpu_to_le16(DRIVER_VENDOR_NUM),
.idProduct = cpu_to_le16(DRIVER_PRODUCT_NUM),
.bNumConfigurations = 2,
};
#define STRING_MANUFACTURER_IDX 0
#define STRING_PRODUCT_IDX 1
#define STRING_SERIAL_IDX 2
static char manufacturer[50];
static char serial[] =
"0123456789.0123456789.0123456789";
static struct usb_string strings_dev[] = {
[STRING_MANUFACTURER_IDX].s = manufacturer,
[STRING_PRODUCT_IDX].s = longname,
[STRING_SERIAL_IDX].s = serial,
{
};
static struct usb_gadget_strings stringtab_dev = {
.language = 0x0409,
.strings = strings_dev,
};
static struct usb_gadget_strings *dev_strings[] = {
&stringtab_dev,
NULL,
};
struct usb_request *alloc_ep_req(struct usb_ep *ep)
{
struct usb_request *req;
req = usb_ep_alloc_request(ep, GFP_ATOMIC);
if (req) {
req->length = buflen;
req->buf = kmalloc(buflen, GFP_ATOMIC);
if (!req->buf) {
usb_ep_free_request(ep, req);
req = NULL;
}
}
return req;
}
void free_ep_req(struct usb_ep *ep, struct usb_request
*req)
{
kfree(req->buf);
usb_ep_free_request(ep, req);
}
static void disable_ep(struct usb_composite_dev *cdev, struct
usb_ep *ep)
{
int value;
if (ep->driver_data) {
value = usb_ep_disable(ep);
if (value < 0)
DBG(cdev, "disable %s --> %d\n",ep->name, value);
ep->driver_data = NULL;
}
}
void disable_endpoints(struct usb_composite_dev *cdev,struct
usb_ep *in, struct usb_ep *out)
{
disable_ep(cdev, in);
disable_ep(cdev, out);
}
static struct timer_list autoresume_timer;
static void zero_autoresume(unsigned long _c)
{
struct usb_composite_dev *cdev = (void *)_c;
struct usb_gadget *g = cdev->gadget;
if (!cdev->config)
return;
if (g->speed != USB_SPEED_UNKNOWN) {
int status = usb_gadget_wakeup(g);
INFO(cdev, "%s --> %d\n", __func__, status);
}
}
static void zero_suspend(struct usb_composite_dev *cdev)
{
if (cdev->gadget->speed == USB_SPEED_UNKNOWN)
return;
if (autoresume) {
mod_timer(&autoresume_timer, jiffies + (HZ *
autoresume));
DBG(cdev, "suspend, wakeup in %d seconds\n",
autoresume);
} else
DBG(cdev, "%s\n", __func__);
}
static void zero_resume(struct usb_composite_dev *cdev)
{
DBG(cdev, "%s\n", __func__);
del_timer(&autoresume_timer);
}
static int __init zero_bind(struct usb_composite_dev
*cdev)
{
int gcnum;
struct usb_gadget *gadget = cdev->gadget;
int id;
id = usb_string_id(cdev);
if (id < 0)
return id;
strings_dev[STRING_MANUFACTURER_IDX].id = id;
device_desc.iManufacturer = id;
id = usb_string_id(cdev);
if (id < 0)
return id;
strings_dev[STRING_PRODUCT_IDX].id = id;
device_desc.iProduct = id;
id = usb_string_id(cdev);
if (id < 0)
return id;
strings_dev[STRING_SERIAL_IDX].id = id;
device_desc.iSerialNumber = id;
setup_timer(&autoresume_timer, zero_autoresume, (unsigned
long) cdev);
if (loopdefault) {
loopback_add(cdev, autoresume != 0);
sourcesink_add(cdev, autoresume != 0);
} else {
}
gcnum = usb_gadget_controller_number(gadget);//獲得控制器代號(hào)
if (gcnum >= 0)
device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
else {
pr_warning("%s: controller '%s' not recognized\n",
longname, gadget->name);
device_desc.bcdDevice = cpu_to_le16(0x9999);
}
INFO(cdev, "%s, version: " DRIVER_VERSION "\n",
longname);
snprintf(manufacturer, sizeof manufacturer, "%s %s with
%s",
init_utsname()->sysname, init_utsname()->release,
gadget->name);
return 0;
}
static int zero_unbind(struct usb_composite_dev *cdev)
{
del_timer_sync(&autoresume_timer);
return 0;
}
static struct usb_composite_driver zero_driver = {
.name = "zero",
.dev = &device_desc,
.strings = dev_strings,
.unbind = zero_unbind,
.suspend = zero_suspend,
.resume = zero_resume,
};
static int __init init(void)
{
return usb_composite_probe(&zero_driver, zero_bind);
}
static void __exit cleanup(void)
{
usb_composite_unregister(&zero_driver);
}
module_init(init);
module_exit(cleanup);
MODULE_AUTHOR("LUTAO");
MODULE_LICENSE("GPL");
|
|
|
來(lái)自： quasiceo > 《待分類(lèi)1》
