xplain-bc: drivers/usb/core/request.c Source File

00001 
00041 #include <assert.h>
00042 #include <mempool.h>
00043 #include <physmem.h>
00044 #include <slist.h>
00045 #include <usb/request.h>
00046 
00047 #include <app/usb.h>
00048 
00049 static struct mem_pool  usb_request_pool;
00050 
00060 void usb_req_init(struct usb_request *req)
00061 {
00062         slist_init(&req->buf_list);
00063         req->flags = 0;
00064         req->bytes_xfered = 0;
00065 }
00066 
00073 struct usb_request *usb_req_alloc(void)
00074 {
00075         struct usb_request      *req;
00076 
00077         req = mem_pool_alloc(&usb_request_pool);
00078         if (req)
00079                 usb_req_init(req);
00080 
00081         return req;
00082 }
00083 
00089 void usb_req_free(struct usb_request *req)
00090 {
00091         mem_pool_free(&usb_request_pool, req);
00092 }
00093 
00099 void usb_init(void)
00100 {
00101         mem_pool_init_physmem(&usb_request_pool, &cpu_sram_pool,
00102                         APP_USB_NR_REQUESTS,
00103                         sizeof(struct usb_request), 2);
00104 }