firewire: ohci: use static inline functions to serialize data of IT DMA

THis commit replaces current implementation with the helper functions added
in the former commit.

Link: https://lore.kernel.org/r/20240802003606.109402-5-o-takashi@sakamocchi.jpSigned-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

drivers/firewire/ohci.c

@@ -162,13 +162,6 @@ struct context {
 	struct tasklet_struct tasklet;
 };
 
-#define IT_HEADER_SY(v)          ((v) <<  0)
-#define IT_HEADER_TCODE(v)       ((v) <<  4)
-#define IT_HEADER_CHANNEL(v)     ((v) <<  8)
-#define IT_HEADER_TAG(v)         ((v) << 14)
-#define IT_HEADER_SPEED(v)       ((v) << 16)
-#define IT_HEADER_DATA_LENGTH(v) ((v) << 16)
-
 struct iso_context {
 	struct fw_iso_context base;
 	struct context context;
@@ -1457,9 +1450,14 @@ static int at_context_queue_packet(struct context *ctx,
 		break;
 
 	case TCODE_STREAM_DATA:
-		header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
-					(packet->speed << 16));
-		header[1] = cpu_to_le32(packet->header[0] & 0xffff0000);
+		ohci1394_it_data_set_speed(header, packet->speed);
+		ohci1394_it_data_set_tag(header, isoc_header_get_tag(packet->header[0]));
+		ohci1394_it_data_set_channel(header, isoc_header_get_channel(packet->header[0]));
+		ohci1394_it_data_set_tcode(header, TCODE_STREAM_DATA);
+		ohci1394_it_data_set_sync(header, isoc_header_get_sy(packet->header[0]));
+
+		ohci1394_it_data_set_data_length(header, isoc_header_get_data_length(packet->header[0]));
+
 		d[0].req_count = cpu_to_le16(8);
 		break;
 
@@ -3403,14 +3401,14 @@ static int queue_iso_transmit(struct iso_context *ctx,
 		d[0].branch_address = cpu_to_le32(d_bus | z);
 
 		header = (__le32 *) &d[1];
-		header[0] = cpu_to_le32(IT_HEADER_SY(p->sy) |
-					IT_HEADER_TAG(p->tag) |
-					IT_HEADER_TCODE(TCODE_STREAM_DATA) |
-					IT_HEADER_CHANNEL(ctx->base.channel) |
-					IT_HEADER_SPEED(ctx->base.speed));
-		header[1] =
-			cpu_to_le32(IT_HEADER_DATA_LENGTH(p->header_length +
-							  p->payload_length));
+
+		ohci1394_it_data_set_speed(header, ctx->base.speed);
+		ohci1394_it_data_set_tag(header, p->tag);
+		ohci1394_it_data_set_channel(header, ctx->base.channel);
+		ohci1394_it_data_set_tcode(header, TCODE_STREAM_DATA);
+		ohci1394_it_data_set_sync(header, p->sy);
+
+		ohci1394_it_data_set_data_length(header, p->header_length + p->payload_length);
 	}
 
 	if (p->header_length > 0) {