145 static int try_mailbox(struct ivtv *itv, struct ivtv_mailbox_data *mbdata, int mb)  in try_mailbox()  argument
147 	u32 flags = readl(&mbdata->mbox[mb].flags);  in try_mailbox()
151 	if (is_free && !test_and_set_bit(mb, &mbdata->busy)) {  in try_mailbox()
152 		write_sync(IVTV_MBOX_DRIVER_BUSY, &mbdata->mbox[mb].flags);  in try_mailbox()
160 static int get_mailbox(struct ivtv *itv, struct ivtv_mailbox_data *mbdata, int flags)  in get_mailbox()  argument
164 	int max_mbox = mbdata->max_mbox;  in get_mailbox()
175 			if (try_mailbox(itv, mbdata, mb))  in get_mailbox()
202 static void clear_all_mailboxes(struct ivtv *itv, struct ivtv_mailbox_data *mbdata)  in clear_all_mailboxes()  argument
206 	for (i = 0; i <= mbdata->max_mbox; i++) {  in clear_all_mailboxes()
208 			i, readl(&mbdata->mbox[i].cmd), readl(&mbdata->mbox[i].flags));  in clear_all_mailboxes()
209 		write_sync(0, &mbdata->mbox[i].flags);  in clear_all_mailboxes()
210 		clear_bit(i, &mbdata->busy);  in clear_all_mailboxes()
216 	struct ivtv_mailbox_data *mbdata = (cmd >= 128) ? &itv->enc_mbox : &itv->dec_mbox;  in ivtv_api_call()  local
223 	if (NULL == mbdata) {  in ivtv_api_call()
260 			mb = i % (mbdata->max_mbox + 1);  in ivtv_api_call()
261 			if (try_mailbox(itv, mbdata, mb)) {  in ivtv_api_call()
262 				write_mailbox(&mbdata->mbox[mb], cmd, args, data);  in ivtv_api_call()
263 				clear_bit(mb, &mbdata->busy);  in ivtv_api_call()
267 					api_info[cmd].name, mb, readl(&mbdata->mbox[mb].flags));  in ivtv_api_call()
270 		clear_all_mailboxes(itv, mbdata);  in ivtv_api_call()
277 	mb = get_mailbox(itv, mbdata, flags);  in ivtv_api_call()
280 		clear_all_mailboxes(itv, mbdata);  in ivtv_api_call()
283 	mbox = &mbdata->mbox[mb];  in ivtv_api_call()
290 		clear_bit(mb, &mbdata->busy);  in ivtv_api_call()
309 			clear_bit(mb, &mbdata->busy);  in ivtv_api_call()
325 	clear_bit(mb, &mbdata->busy);  in ivtv_api_call()
372 void ivtv_api_get_data(struct ivtv_mailbox_data *mbdata, int mb,  in ivtv_api_get_data()  argument
375 	volatile u32 __iomem *p = mbdata->mbox[mb].data;  in ivtv_api_get_data()