22 #define API_CACHE	 (1 << 0)	/* Allow the command to be stored in the cache */
23 #define API_RESULT	 (1 << 1)	/* Allow 1 second for this cmd to end */
24 #define API_FAST_RESULT	 (3 << 1)	/* Allow 0.1 second for this cmd to end */
25 #define API_DMA		 (1 << 3)	/* DMA mailbox, has special handling */
26 #define API_HIGH_VOL	 (1 << 5)	/* High volume command (i.e. called during encoding or decoding) */
27 #define API_NO_WAIT_MB	 (1 << 4)	/* Command may not wait for a free mailbox */
28 #define API_NO_WAIT_RES	 (1 << 5)	/* Command may not wait for the result */
29 #define API_NO_POLL	 (1 << 6)	/* Avoid pointless polling */
131 static int try_mailbox(struct ivtv *itv, struct ivtv_mailbox_data *mbdata, int mb)  in try_mailbox()  argument
133 	u32 flags = readl(&mbdata->mbox[mb].flags);  in try_mailbox()
137 	if (is_free && !test_and_set_bit(mb, &mbdata->busy)) {  in try_mailbox()
138 		write_sync(IVTV_MBOX_DRIVER_BUSY, &mbdata->mbox[mb].flags);  in try_mailbox()
139 		return 1;  in try_mailbox()
149 	int i, mb;  in get_mailbox()  local
156 		max_mbox = 1;  in get_mailbox()
160 		for (mb = 1; mb <= max_mbox; mb++)  in get_mailbox()
161 			if (try_mailbox(itv, mbdata, mb))  in get_mailbox()
162 				return mb;  in get_mailbox()
205 	int flags, mb, i;  in ivtv_api_call()  local
215 		IVTV_ERR("Invalid MB call: cmd = 0x%02x, args = %d\n", cmd, args);  in ivtv_api_call()
220 	    IVTV_DEBUG_HI_MB("MB Call: %s\n", api_info[cmd].name);  in ivtv_api_call()
223 	    IVTV_DEBUG_MB("MB Call: %s\n", api_info[cmd].name);  in ivtv_api_call()
246 			mb = i % (mbdata->max_mbox + 1);  in ivtv_api_call()
247 			if (try_mailbox(itv, mbdata, mb)) {  in ivtv_api_call()
248 				write_mailbox(&mbdata->mbox[mb], cmd, args, data);  in ivtv_api_call()
249 				clear_bit(mb, &mbdata->busy);  in ivtv_api_call()
253 					api_info[cmd].name, mb, readl(&mbdata->mbox[mb].flags));  in ivtv_api_call()
263 	mb = get_mailbox(itv, mbdata, flags);  in ivtv_api_call()
264 	if (mb < 0) {  in ivtv_api_call()
269 	mbox = &mbdata->mbox[mb];  in ivtv_api_call()
276 		clear_bit(mb, &mbdata->busy);  in ivtv_api_call()
295 			clear_bit(mb, &mbdata->busy);  in ivtv_api_call()
299 			mdelay(1);  in ivtv_api_call()
301 			ivtv_msleep_timeout(1, 0);  in ivtv_api_call()
311 	clear_bit(mb, &mbdata->busy);  in ivtv_api_call()
358 void ivtv_api_get_data(struct ivtv_mailbox_data *mbdata, int mb,  in ivtv_api_get_data()  argument
361 	volatile u32 __iomem *p = mbdata->mbox[mb].data;  in ivtv_api_get_data()