usb: musb: musbhsdma cleanup

This patch:
- cleans musbhsdma defines
- enables burst mode for both dma modes
- keeps dma in mode1 (it's safe)
- rely on the mode set by musb_gadget.c or musb_host.c and don't branch
  again
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>

drivers/usb/musb/musbhsdma.c

@@ -128,27 +128,19 @@ static void configure_channel(struct dma_channel *channel,
 	DBG(4, "%p, pkt_sz %d, addr 0x%x, len %d, mode %d\n",
 			channel, packet_sz, dma_addr, len, mode);
 
-	if (mode) {
-		csr |= 1 << MUSB_HSDMA_MODE1_SHIFT;
-		BUG_ON(len < packet_sz);
-
-		if (packet_sz >= 64) {
-			csr |= MUSB_HSDMA_BURSTMODE_INCR16
-					<< MUSB_HSDMA_BURSTMODE_SHIFT;
-		} else if (packet_sz >= 32) {
-			csr |= MUSB_HSDMA_BURSTMODE_INCR8
-					<< MUSB_HSDMA_BURSTMODE_SHIFT;
-		} else if (packet_sz >= 16) {
-			csr |= MUSB_HSDMA_BURSTMODE_INCR4
-					<< MUSB_HSDMA_BURSTMODE_SHIFT;
-		}
-	}
+	if (packet_sz >= 64)
+		csr |= MUSB_HSDMA_BURSTMODE_INCR16;
+	else if (packet_sz >= 32)
+		csr |= MUSB_HSDMA_BURSTMODE_INCR8;
+	else if (packet_sz >= 16)
+		csr |= MUSB_HSDMA_BURSTMODE_INCR4;
 
 	csr |= (musb_channel->epnum << MUSB_HSDMA_ENDPOINT_SHIFT)
-		| (1 << MUSB_HSDMA_ENABLE_SHIFT)
-		| (1 << MUSB_HSDMA_IRQENABLE_SHIFT)
+		| MUSB_HSDMA_MODE1
+		| MUSB_HSDMA_ENABLE
+		| MUSB_HSDMA_IRQENABLE
 		| (musb_channel->transmit
-				? (1 << MUSB_HSDMA_TRANSMIT_SHIFT)
+				? MUSB_HSDMA_TRANSMIT
 				: 0);
 
 	/* address/count */
@@ -181,10 +173,7 @@ static int dma_channel_program(struct dma_channel *channel,
 	musb_channel->max_packet_sz = packet_sz;
 	channel->status = MUSB_DMA_STATUS_BUSY;
 
-	if ((mode == 1) && (len >= packet_sz))
-		configure_channel(channel, packet_sz, 1, dma_addr, len);
-	else
-		configure_channel(channel, packet_sz, 0, dma_addr, len);
+	configure_channel(channel, packet_sz, mode, dma_addr, len);
 
 	return true;
 }
@@ -267,7 +256,7 @@ static irqreturn_t dma_controller_irq(int irq, void *private_data)
 					MUSB_HSDMA_CHANNEL_OFFSET(bchannel,
 							MUSB_HSDMA_CONTROL));
 
-			if (csr & (1 << MUSB_HSDMA_BUSERROR_SHIFT)) {
+			if (csr & MUSB_HSDMA_BUSERROR) {
 				musb_channel->channel.status =
 					MUSB_DMA_STATUS_BUS_ABORT;
 			} else {

drivers/usb/musb/musbhsdma.h

@@ -110,18 +110,18 @@ static inline void musb_write_hsdma_count(void __iomem *mbase,
 #endif /* CONFIG_BLACKFIN */
 
 /* control register (16-bit): */
-#define MUSB_HSDMA_ENABLE_SHIFT		0
-#define MUSB_HSDMA_TRANSMIT_SHIFT	1
-#define MUSB_HSDMA_MODE1_SHIFT		2
-#define MUSB_HSDMA_IRQENABLE_SHIFT	3
+#define MUSB_HSDMA_ENABLE		(1 << 0)
+#define MUSB_HSDMA_TRANSMIT		(1 << 1)
+#define MUSB_HSDMA_MODE1		(1 << 2)
+#define MUSB_HSDMA_IRQENABLE		(1 << 3)
 #define MUSB_HSDMA_ENDPOINT_SHIFT	4
-#define MUSB_HSDMA_BUSERROR_SHIFT	8
+#define MUSB_HSDMA_BUSERROR		(1 << 8)
+
 #define MUSB_HSDMA_BURSTMODE_SHIFT	9
-#define MUSB_HSDMA_BURSTMODE		(3 << MUSB_HSDMA_BURSTMODE_SHIFT)
-#define MUSB_HSDMA_BURSTMODE_UNSPEC	0
-#define MUSB_HSDMA_BURSTMODE_INCR4	1
-#define MUSB_HSDMA_BURSTMODE_INCR8	2
-#define MUSB_HSDMA_BURSTMODE_INCR16	3
+#define MUSB_HSDMA_BURSTMODE_UNSPEC	(0 << MUSB_HSDMA_BURSTMODE_SHIFT)
+#define MUSB_HSDMA_BURSTMODE_INCR4	(1 << MUSB_HSDMA_BURSTMODE_SHIFT)
+#define MUSB_HSDMA_BURSTMODE_INCR8	(2 << MUSB_HSDMA_BURSTMODE_SHIFT)
+#define MUSB_HSDMA_BURSTMODE_INCR16	(3 << MUSB_HSDMA_BURSTMODE_SHIFT)
 
 #define MUSB_HSDMA_CHANNELS		8