usb: musb: drop unneeded musb_debug trickery

We have a generic way of enabling/disabling
different debug messages on a driver called
DYNAMIC_PRINTK. Anyone interested in enabling
just part of the debug messages, please read
the documentation under:

Documentation/dynamic-debug-howto.txt

for information on how to use that great
infrastructure.

Signed-off-by: Felipe Balbi <balbi@ti.com>

17 files changed, 267 insertions, 301 deletions

diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 74073b363c3..f90123f4ce5 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -176,11 +176,3 @@ config USB_TUSB_OMAP_DMA
 	help
 	  Enable DMA transfers on TUSB 6010 when OMAP DMA is available.
 
-config	USB_MUSB_DEBUG
-	depends on USB_MUSB_HDRC
-	bool "Enable debugging messages"
-	default n
-	help
-	  This enables musb debugging. To set the logging level use the debug
-	  module parameter. Starting at level 3, per-transfer (urb, usb_request,
-	  packet, or dma transfer) tracing may kick in.
diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile
index 74df5284894..4e15281b9e0 100644
--- a/drivers/usb/musb/Makefile
+++ b/drivers/usb/musb/Makefile
@@ -2,8 +2,6 @@
 # for USB OTG silicon based on Mentor Graphics INVENTRA designs
 #
 
-ccflags-$(CONFIG_USB_MUSB_DEBUG) := -DDEBUG
-
 obj-$(CONFIG_USB_MUSB_HDRC) += musb_hdrc.o
 
 musb_hdrc-y := musb_core.o
diff --git a/drivers/usb/musb/am35x.c b/drivers/usb/musb/am35x.c
index 9e6209f87d3..23ac28f98d9 100644
--- a/drivers/usb/musb/am35x.c
+++ b/drivers/usb/musb/am35x.c
@@ -151,7 +151,7 @@ static void otg_timer(unsigned long _musb)
 	 * status change events (from the transceiver) otherwise.
 	 */
 	devctl = musb_readb(mregs, MUSB_DEVCTL);
-	DBG(7, "Poll devctl %02x (%s)\n", devctl,
+	dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
 		otg_state_string(musb->xceiv->state));
 
 	spin_lock_irqsave(&musb->lock, flags);
@@ -203,7 +203,7 @@ static void am35x_musb_try_idle(struct musb *musb, unsigned long timeout)
 	/* Never idle if active, or when VBUS timeout is not set as host */
 	if (musb->is_active || (musb->a_wait_bcon == 0 &&
 				musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
-		DBG(4, "%s active, deleting timer\n",
+		dev_dbg(musb->controller, "%s active, deleting timer\n",
 			otg_state_string(musb->xceiv->state));
 		del_timer(&otg_workaround);
 		last_timer = jiffies;
@@ -211,12 +211,12 @@ static void am35x_musb_try_idle(struct musb *musb, unsigned long timeout)
 	}
 
 	if (time_after(last_timer, timeout) && timer_pending(&otg_workaround)) {
-		DBG(4, "Longer idle timer already pending, ignoring...\n");
+		dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n");
 		return;
 	}
 	last_timer = timeout;
 
-	DBG(4, "%s inactive, starting idle timer for %u ms\n",
+	dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
 		otg_state_string(musb->xceiv->state),
 		jiffies_to_msecs(timeout - jiffies));
 	mod_timer(&otg_workaround, timeout);
@@ -305,7 +305,7 @@ static irqreturn_t am35x_musb_interrupt(int irq, void *hci)
 		}
 
 		/* NOTE: this must complete power-on within 100 ms. */
-		DBG(2, "VBUS %s (%s)%s, devctl %02x\n",
+		dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
 				drvvbus ? "on" : "off",
 				otg_state_string(musb->xceiv->state),
 				err ? " ERROR" : "",
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
index e141d89656e..95d75c00404 100644
--- a/drivers/usb/musb/blackfin.c
+++ b/drivers/usb/musb/blackfin.c
@@ -43,7 +43,7 @@ void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
 
 	musb_writew(epio, MUSB_TXCOUNT, len);
 
-	DBG(4, "TX ep%d fifo %p count %d buf %p, epio %p\n",
+	dev_dbg(musb->controller, "TX ep%d fifo %p count %d buf %p, epio %p\n",
 			hw_ep->epnum, fifo, len, src, epio);
 
 	dump_fifo_data(src, len);
@@ -154,7 +154,7 @@ void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 				*(dst + len - 1) = (u8)inw((unsigned long)fifo + 4);
 		}
 	}
-	DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
+	dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
 			'R', hw_ep->epnum, fifo, len, dst);
 
 	dump_fifo_data(dst, len);
@@ -279,13 +279,14 @@ static void musb_conn_timer_handler(unsigned long _musb)
 		}
 		break;
 	default:
-		DBG(1, "%s state not handled\n",
+		dev_dbg(musb->controller, "%s state not handled\n",
 			otg_state_string(musb->xceiv->state));
 		break;
 	}
 	spin_unlock_irqrestore(&musb->lock, flags);
 
-	DBG(4, "state is %s\n", otg_state_string(musb->xceiv->state));
+	dev_dbg(musb->controller, "state is %s\n",
+		otg_state_string(musb->xceiv->state));
 }
 
 static void bfin_musb_enable(struct musb *musb)
@@ -307,7 +308,7 @@ static void bfin_musb_set_vbus(struct musb *musb, int is_on)
 		value = !value;
 	gpio_set_value(musb->config->gpio_vrsel, value);
 
-	DBG(1, "VBUS %s, devctl %02x "
+	dev_dbg(musb->controller, "VBUS %s, devctl %02x "
 		/* otg %3x conf %08x prcm %08x */ "\n",
 		otg_state_string(musb->xceiv->state),
 		musb_readb(musb->mregs, MUSB_DEVCTL));
diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c
index ab434fbd8c3..149f3f310a0 100644
--- a/drivers/usb/musb/cppi_dma.c
+++ b/drivers/usb/musb/cppi_dma.c
@@ -236,7 +236,7 @@ static int cppi_controller_stop(struct dma_controller *c)
 	musb_writel(tibase, DAVINCI_RXCPPI_INTCLR_REG,
 			DAVINCI_DMA_ALL_CHANNELS_ENABLE);
 
-	DBG(1, "Tearing down RX and TX Channels\n");
+	dev_dbg(musb->controller, "Tearing down RX and TX Channels\n");
 	for (i = 0; i < ARRAY_SIZE(controller->tx); i++) {
 		/* FIXME restructure of txdma to use bds like rxdma */
 		controller->tx[i].last_processed = NULL;
@@ -301,13 +301,13 @@ cppi_channel_allocate(struct dma_controller *c,
 	 */
 	if (transmit) {
 		if (index >= ARRAY_SIZE(controller->tx)) {
-			DBG(1, "no %cX%d CPPI channel\n", 'T', index);
+			dev_dbg(musb->controller, "no %cX%d CPPI channel\n", 'T', index);
 			return NULL;
 		}
 		cppi_ch = controller->tx + index;
 	} else {
 		if (index >= ARRAY_SIZE(controller->rx)) {
-			DBG(1, "no %cX%d CPPI channel\n", 'R', index);
+			dev_dbg(musb->controller, "no %cX%d CPPI channel\n", 'R', index);
 			return NULL;
 		}
 		cppi_ch = controller->rx + index;
@@ -318,13 +318,13 @@ cppi_channel_allocate(struct dma_controller *c,
 	 * with the other DMA engine too
 	 */
 	if (cppi_ch->hw_ep)
-		DBG(1, "re-allocating DMA%d %cX channel %p\n",
+		dev_dbg(musb->controller, "re-allocating DMA%d %cX channel %p\n",
 				index, transmit ? 'T' : 'R', cppi_ch);
 	cppi_ch->hw_ep = ep;
 	cppi_ch->channel.status = MUSB_DMA_STATUS_FREE;
 	cppi_ch->channel.max_len = 0x7fffffff;
 
-	DBG(4, "Allocate CPPI%d %cX\n", index, transmit ? 'T' : 'R');
+	dev_dbg(musb->controller, "Allocate CPPI%d %cX\n", index, transmit ? 'T' : 'R');
 	return &cppi_ch->channel;
 }
 
@@ -339,7 +339,7 @@ static void cppi_channel_release(struct dma_channel *channel)
 	c = container_of(channel, struct cppi_channel, channel);
 	tibase = c->controller->tibase;
 	if (!c->hw_ep)
-		DBG(1, "releasing idle DMA channel %p\n", c);
+		dev_dbg(musb->controller, "releasing idle DMA channel %p\n", c);
 	else if (!c->transmit)
 		core_rxirq_enable(tibase, c->index + 1);
 
@@ -597,7 +597,7 @@ cppi_next_tx_segment(struct musb *musb, struct cppi_channel *tx)
 		length = min(n_bds * maxpacket, length);
 	}
 
-	DBG(4, "TX DMA%d, pktSz %d %s bds %d dma 0x%llx len %u\n",
+	dev_dbg(musb->controller, "TX DMA%d, pktSz %d %s bds %d dma 0x%llx len %u\n",
 			tx->index,
 			maxpacket,
 			rndis ? "rndis" : "transparent",
@@ -654,7 +654,7 @@ cppi_next_tx_segment(struct musb *musb, struct cppi_channel *tx)
 				bd->hw_options |= CPPI_ZERO_SET;
 		}
 
-		DBG(5, "TXBD %p: nxt %08x buf %08x len %04x opt %08x\n",
+		dev_dbg(musb->controller, "TXBD %p: nxt %08x buf %08x len %04x opt %08x\n",
 				bd, bd->hw_next, bd->hw_bufp,
 				bd->hw_off_len, bd->hw_options);
 
@@ -819,7 +819,7 @@ cppi_next_rx_segment(struct musb *musb, struct cppi_channel *rx, int onepacket)
 
 	length = min(n_bds * maxpacket, length);
 
-	DBG(4, "RX DMA%d seg, maxp %d %s bds %d (cnt %d) "
+	dev_dbg(musb->controller, "RX DMA%d seg, maxp %d %s bds %d (cnt %d) "
 			"dma 0x%llx len %u %u/%u\n",
 			rx->index, maxpacket,
 			onepacket
@@ -936,7 +936,7 @@ cppi_next_rx_segment(struct musb *musb, struct cppi_channel *rx, int onepacket)
 			DAVINCI_RXCPPI_BUFCNT0_REG + (rx->index * 4))
 			& 0xffff;
 	if (i < (2 + n_bds)) {
-		DBG(2, "bufcnt%d underrun - %d (for %d)\n",
+		dev_dbg(musb->controller, "bufcnt%d underrun - %d (for %d)\n",
 					rx->index, i, n_bds);
 		musb_writel(tibase,
 			DAVINCI_RXCPPI_BUFCNT0_REG + (rx->index * 4),
@@ -985,7 +985,7 @@ static int cppi_channel_program(struct dma_channel *ch,
 		/* WARN_ON(1); */
 		break;
 	case MUSB_DMA_STATUS_UNKNOWN:
-		DBG(1, "%cX DMA%d not allocated!\n",
+		dev_dbg(musb->controller, "%cX DMA%d not allocated!\n",
 				cppi_ch->transmit ? 'T' : 'R',
 				cppi_ch->index);
 		/* FALLTHROUGH */
@@ -1040,7 +1040,7 @@ static bool cppi_rx_scan(struct cppi *cppi, unsigned ch)
 		if (!completed && (bd->hw_options & CPPI_OWN_SET))
 			break;
 
-		DBG(5, "C/RXBD %llx: nxt %08x buf %08x "
+		dev_dbg(musb->controller, "C/RXBD %llx: nxt %08x buf %08x "
 			"off.len %08x opt.len %08x (%d)\n",
 			(unsigned long long)bd->dma, bd->hw_next, bd->hw_bufp,
 			bd->hw_off_len, bd->hw_options,
@@ -1062,7 +1062,7 @@ static bool cppi_rx_scan(struct cppi *cppi, unsigned ch)
 			 * CPPI ignores those BDs even though OWN is still set.
 			 */
 			completed = true;
-			DBG(3, "rx short %d/%d (%d)\n",
+			dev_dbg(musb->controller, "rx short %d/%d (%d)\n",
 					len, bd->buflen,
 					rx->channel.actual_len);
 		}
@@ -1112,7 +1112,7 @@ static bool cppi_rx_scan(struct cppi *cppi, unsigned ch)
 		musb_ep_select(cppi->mregs, rx->index + 1);
 		csr = musb_readw(regs, MUSB_RXCSR);
 		if (csr & MUSB_RXCSR_DMAENAB) {
-			DBG(4, "list%d %p/%p, last %llx%s, csr %04x\n",
+			dev_dbg(musb->controller, "list%d %p/%p, last %llx%s, csr %04x\n",
 				rx->index,
 				rx->head, rx->tail,
 				rx->last_processed
@@ -1175,7 +1175,7 @@ irqreturn_t cppi_interrupt(int irq, void *dev_id)
 		return IRQ_NONE;
 	}
 
-	DBG(4, "CPPI IRQ Tx%x Rx%x\n", tx, rx);
+	dev_dbg(musb->controller, "CPPI IRQ Tx%x Rx%x\n", tx, rx);
 
 	/* process TX channels */
 	for (index = 0; tx; tx = tx >> 1, index++) {
@@ -1203,7 +1203,7 @@ irqreturn_t cppi_interrupt(int irq, void *dev_id)
 		 * that needs to be acknowledged.
 		 */
 		if (NULL == bd) {
-			DBG(1, "null BD\n");
+			dev_dbg(musb->controller, "null BD\n");
 			musb_writel(&tx_ram->tx_complete, 0, 0);
 			continue;
 		}
@@ -1218,7 +1218,7 @@ irqreturn_t cppi_interrupt(int irq, void *dev_id)
 			if (bd->hw_options & CPPI_OWN_SET)
 				break;
 
-			DBG(5, "C/TXBD %p n %x b %x off %x opt %x\n",
+			dev_dbg(musb->controller, "C/TXBD %p n %x b %x off %x opt %x\n",
 					bd, bd->hw_next, bd->hw_bufp,
 					bd->hw_off_len, bd->hw_options);
 
diff --git a/drivers/usb/musb/da8xx.c b/drivers/usb/musb/da8xx.c
index 0d8984993a3..662ed34980b 100644
--- a/drivers/usb/musb/da8xx.c
+++ b/drivers/usb/musb/da8xx.c
@@ -199,7 +199,7 @@ static void otg_timer(unsigned long _musb)
 	 * status change events (from the transceiver) otherwise.
 	 */
 	devctl = musb_readb(mregs, MUSB_DEVCTL);
-	DBG(7, "Poll devctl %02x (%s)\n", devctl,
+	dev_dbg(musb->controller, "Poll devctl %02x (%s)\n", devctl,
 		otg_state_string(musb->xceiv->state));
 
 	spin_lock_irqsave(&musb->lock, flags);
@@ -274,7 +274,7 @@ static void da8xx_musb_try_idle(struct musb *musb, unsigned long timeout)
 	/* Never idle if active, or when VBUS timeout is not set as host */
 	if (musb->is_active || (musb->a_wait_bcon == 0 &&
 				musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
-		DBG(4, "%s active, deleting timer\n",
+		dev_dbg(musb->controller, "%s active, deleting timer\n",
 			otg_state_string(musb->xceiv->state));
 		del_timer(&otg_workaround);
 		last_timer = jiffies;
@@ -282,12 +282,12 @@ static void da8xx_musb_try_idle(struct musb *musb, unsigned long timeout)
 	}
 
 	if (time_after(last_timer, timeout) && timer_pending(&otg_workaround)) {
-		DBG(4, "Longer idle timer already pending, ignoring...\n");
+		dev_dbg(musb->controller, "Longer idle timer already pending, ignoring...\n");
 		return;
 	}
 	last_timer = timeout;
 
-	DBG(4, "%s inactive, starting idle timer for %u ms\n",
+	dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
 		otg_state_string(musb->xceiv->state),
 		jiffies_to_msecs(timeout - jiffies));
 	mod_timer(&otg_workaround, timeout);
@@ -314,7 +314,7 @@ static irqreturn_t da8xx_musb_interrupt(int irq, void *hci)
 		goto eoi;
 
 	musb_writel(reg_base, DA8XX_USB_INTR_SRC_CLEAR_REG, status);
-	DBG(4, "USB IRQ %08x\n", status);
+	dev_dbg(musb->controller, "USB IRQ %08x\n", status);
 
 	musb->int_rx = (status & DA8XX_INTR_RX_MASK) >> DA8XX_INTR_RX_SHIFT;
 	musb->int_tx = (status & DA8XX_INTR_TX_MASK) >> DA8XX_INTR_TX_SHIFT;
@@ -366,7 +366,7 @@ static irqreturn_t da8xx_musb_interrupt(int irq, void *hci)
 			portstate(musb->port1_status &= ~USB_PORT_STAT_POWER);
 		}
 
-		DBG(2, "VBUS %s (%s)%s, devctl %02x\n",
+		dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
 				drvvbus ? "on" : "off",
 				otg_state_string(musb->xceiv->state),
 				err ? " ERROR" : "",
@@ -413,7 +413,7 @@ static int da8xx_musb_set_mode(struct musb *musb, u8 musb_mode)
 		break;
 #endif
 	default:
-		DBG(2, "Trying to set unsupported mode %u\n", musb_mode);
+		dev_dbg(musb->controller, "Trying to set unsupported mode %u\n", musb_mode);
 	}
 
 	__raw_writel(cfgchip2, CFGCHIP2);
diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index 3661b81a957..2a2adf6492c 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -220,7 +220,7 @@ static void otg_timer(unsigned long _musb)
 	* status change events (from the transceiver) otherwise.
 	 */
 	devctl = musb_readb(mregs, MUSB_DEVCTL);
-	DBG(7, "poll devctl %02x (%s)\n", devctl,
+	dev_dbg(musb->controller, "poll devctl %02x (%s)\n", devctl,
 		otg_state_string(musb->xceiv->state));
 
 	spin_lock_irqsave(&musb->lock, flags);
@@ -298,7 +298,7 @@ static irqreturn_t davinci_musb_interrupt(int irq, void *__hci)
 	/* ack and handle non-CPPI interrupts */
 	tmp = musb_readl(tibase, DAVINCI_USB_INT_SRC_MASKED_REG);
 	musb_writel(tibase, DAVINCI_USB_INT_SRC_CLR_REG, tmp);
-	DBG(4, "IRQ %08x\n", tmp);
+	dev_dbg(musb->controller, "IRQ %08x\n", tmp);
 
 	musb->int_rx = (tmp & DAVINCI_USB_RXINT_MASK)
 			>> DAVINCI_USB_RXINT_SHIFT;
@@ -355,7 +355,7 @@ static irqreturn_t davinci_musb_interrupt(int irq, void *__hci)
 		 * (OTG_TIME_A_WAIT_VRISE) but we don't check for that.
 		 */
 		davinci_musb_source_power(musb, drvvbus, 0);
-		DBG(2, "VBUS %s (%s)%s, devctl %02x\n",
+		dev_dbg(musb->controller, "VBUS %s (%s)%s, devctl %02x\n",
 				drvvbus ? "on" : "off",
 				otg_state_string(musb->xceiv->state),
 				err ? " ERROR" : "",
@@ -485,7 +485,7 @@ static int davinci_musb_exit(struct musb *musb)
 				break;
 			if ((devctl & MUSB_DEVCTL_VBUS) != warn) {
 				warn = devctl & MUSB_DEVCTL_VBUS;
-				DBG(1, "VBUS %d\n",
+				dev_dbg(musb->controller, "VBUS %d\n",
 					warn >> MUSB_DEVCTL_VBUS_SHIFT);
 			}
 			msleep(1000);
@@ -494,7 +494,7 @@ static int davinci_musb_exit(struct musb *musb)
 
 		/* in OTG mode, another host might be connected */
 		if (devctl & MUSB_DEVCTL_VBUS)
-			DBG(1, "VBUS off timeout (devctl %02x)\n", devctl);
+			dev_dbg(musb->controller, "VBUS off timeout (devctl %02x)\n", devctl);
 	}
 
 	phy_off();
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 9a280872c2b..6e3988cb6e8 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -104,10 +104,6 @@
 #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON)
 
 
-unsigned musb_debug;
-module_param_named(debug, musb_debug, uint, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Debug message level. Default = 0");
-
 #define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia"
 #define DRIVER_DESC "Inventra Dual-Role USB Controller Driver"
 
@@ -157,10 +153,8 @@ static int musb_ulpi_read(struct otg_transceiver *otg, u32 offset)
 	while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
 				& MUSB_ULPI_REG_CMPLT)) {
 		i++;
-		if (i == 10000) {
-			DBG(3, "ULPI read timed out\n");
+		if (i == 10000)
 			return -ETIMEDOUT;
-		}
 
 	}
 	r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
@@ -190,10 +184,8 @@ static int musb_ulpi_write(struct otg_transceiver *otg,
 	while (!(musb_readb(addr, MUSB_ULPI_REG_CONTROL)
 				& MUSB_ULPI_REG_CMPLT)) {
 		i++;
-		if (i == 10000) {
-			DBG(3, "ULPI write timed out\n");
+		if (i == 10000)
 			return -ETIMEDOUT;
-		}
 	}
 
 	r = musb_readb(addr, MUSB_ULPI_REG_CONTROL);
@@ -221,11 +213,12 @@ static struct otg_io_access_ops musb_ulpi_access = {
  */
 void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
 {
+	struct musb *musb = hw_ep->musb;
 	void __iomem *fifo = hw_ep->fifo;
 
 	prefetch((u8 *)src);
 
-	DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
+	dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
 			'T', hw_ep->epnum, fifo, len, src);
 
 	/* we can't assume unaligned reads work */
@@ -262,9 +255,10 @@ void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
  */
 void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
 {
+	struct musb *musb = hw_ep->musb;
 	void __iomem *fifo = hw_ep->fifo;
 
-	DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
+	dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
 			'R', hw_ep->epnum, fifo, len, dst);
 
 	/* we can't assume unaligned writes work */
@@ -346,20 +340,20 @@ void musb_otg_timer_func(unsigned long data)
 	spin_lock_irqsave(&musb->lock, flags);
 	switch (musb->xceiv->state) {
 	case OTG_STATE_B_WAIT_ACON:
-		DBG(1, "HNP: b_wait_acon timeout; back to b_peripheral\n");
+		dev_dbg(musb->controller, "HNP: b_wait_acon timeout; back to b_peripheral\n");
 		musb_g_disconnect(musb);
 		musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 		musb->is_active = 0;
 		break;
 	case OTG_STATE_A_SUSPEND:
 	case OTG_STATE_A_WAIT_BCON:
-		DBG(1, "HNP: %s timeout\n",
+		dev_dbg(musb->controller, "HNP: %s timeout\n",
 			otg_state_string(musb->xceiv->state));
 		musb_platform_set_vbus(musb, 0);
 		musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
 		break;
 	default:
-		DBG(1, "HNP: Unhandled mode %s\n",
+		dev_dbg(musb->controller, "HNP: Unhandled mode %s\n",
 			otg_state_string(musb->xceiv->state));
 	}
 	musb->ignore_disconnect = 0;
@@ -375,16 +369,16 @@ void musb_hnp_stop(struct musb *musb)
 	void __iomem	*mbase = musb->mregs;
 	u8	reg;
 
-	DBG(1, "HNP: stop from %s\n", otg_state_string(musb->xceiv->state));
+	dev_dbg(musb->controller, "HNP: stop from %s\n", otg_state_string(musb->xceiv->state));
 
 	switch (musb->xceiv->state) {
 	case OTG_STATE_A_PERIPHERAL:
 		musb_g_disconnect(musb);
-		DBG(1, "HNP: back to %s\n",
+		dev_dbg(musb->controller, "HNP: back to %s\n",
 			otg_state_string(musb->xceiv->state));
 		break;
 	case OTG_STATE_B_HOST:
-		DBG(1, "HNP: Disabling HR\n");
+		dev_dbg(musb->controller, "HNP: Disabling HR\n");
 		hcd->self.is_b_host = 0;
 		musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 		MUSB_DEV_MODE(musb);
@@ -394,7 +388,7 @@ void musb_hnp_stop(struct musb *musb)
 		/* REVISIT: Start SESSION_REQUEST here? */
 		break;
 	default:
-		DBG(1, "HNP: Stopping in unknown state %s\n",
+		dev_dbg(musb->controller, "HNP: Stopping in unknown state %s\n",
 			otg_state_string(musb->xceiv->state));
 	}
 
@@ -425,7 +419,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 {
 	irqreturn_t handled = IRQ_NONE;
 
-	DBG(3, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl,
+	dev_dbg(musb->controller, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl,
 		int_usb);
 
 	/* in host mode, the peripheral may issue remote wakeup.
@@ -434,7 +428,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 	 */
 	if (int_usb & MUSB_INTR_RESUME) {
 		handled = IRQ_HANDLED;
-		DBG(3, "RESUME (%s)\n", otg_state_string(musb->xceiv->state));
+		dev_dbg(musb->controller, "RESUME (%s)\n", otg_state_string(musb->xceiv->state));
 
 		if (devctl & MUSB_DEVCTL_HM) {
 #ifdef CONFIG_USB_MUSB_HDRC_HCD
@@ -449,7 +443,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 				if (power & MUSB_POWER_SUSPENDM) {
 					/* spurious */
 					musb->int_usb &= ~MUSB_INTR_SUSPEND;
-					DBG(2, "Spurious SUSPENDM\n");
+					dev_dbg(musb->controller, "Spurious SUSPENDM\n");
 					break;
 				}
 
@@ -521,11 +515,11 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 
 		if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS
 				&& (devctl & MUSB_DEVCTL_BDEVICE)) {
-			DBG(3, "SessReq while on B state\n");
+			dev_dbg(musb->controller, "SessReq while on B state\n");
 			return IRQ_HANDLED;
 		}
 
-		DBG(1, "SESSION_REQUEST (%s)\n",
+		dev_dbg(musb->controller, "SESSION_REQUEST (%s)\n",
 			otg_state_string(musb->xceiv->state));
 
 		/* IRQ arrives from ID pin sense or (later, if VBUS power
@@ -590,7 +584,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 			break;
 		}
 
-		DBG(1, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n",
+		dev_dbg(musb->controller, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n",
 				otg_state_string(musb->xceiv->state),
 				devctl,
 				({ char *s;
@@ -616,7 +610,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 
 #endif
 	if (int_usb & MUSB_INTR_SUSPEND) {
-		DBG(1, "SUSPEND (%s) devctl %02x power %02x\n",
+		dev_dbg(musb->controller, "SUSPEND (%s) devctl %02x power %02x\n",
 			otg_state_string(musb->xceiv->state), devctl, power);
 		handled = IRQ_HANDLED;
 
@@ -649,7 +643,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 			if (musb->is_active) {
 #ifdef	CONFIG_USB_MUSB_OTG
 				musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
-				DBG(1, "HNP: Setting timer for b_ase0_brst\n");
+				dev_dbg(musb->controller, "HNP: Setting timer for b_ase0_brst\n");
 				mod_timer(&musb->otg_timer, jiffies
 					+ msecs_to_jiffies(
 							OTG_TIME_B_ASE0_BRST));
@@ -668,7 +662,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 			break;
 		case OTG_STATE_B_HOST:
 			/* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
-			DBG(1, "REVISIT: SUSPEND as B_HOST\n");
+			dev_dbg(musb->controller, "REVISIT: SUSPEND as B_HOST\n");
 			break;
 		default:
 			/* "should not happen" */
@@ -711,14 +705,14 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 		switch (musb->xceiv->state) {
 		case OTG_STATE_B_PERIPHERAL:
 			if (int_usb & MUSB_INTR_SUSPEND) {
-				DBG(1, "HNP: SUSPEND+CONNECT, now b_host\n");
+				dev_dbg(musb->controller, "HNP: SUSPEND+CONNECT, now b_host\n");
 				int_usb &= ~MUSB_INTR_SUSPEND;
 				goto b_host;
 			} else
-				DBG(1, "CONNECT as b_peripheral???\n");
+				dev_dbg(musb->controller, "CONNECT as b_peripheral???\n");
 			break;
 		case OTG_STATE_B_WAIT_ACON:
-			DBG(1, "HNP: CONNECT, now b_host\n");
+			dev_dbg(musb->controller, "HNP: CONNECT, now b_host\n");
 b_host:
 			musb->xceiv->state = OTG_STATE_B_HOST;
 			hcd->self.is_b_host = 1;
@@ -741,13 +735,13 @@ b_host:
 		else
 			usb_hcd_resume_root_hub(hcd);
 
-		DBG(1, "CONNECT (%s) devctl %02x\n",
+		dev_dbg(musb->controller, "CONNECT (%s) devctl %02x\n",
 				otg_state_string(musb->xceiv->state), devctl);
 	}
 #endif	/* CONFIG_USB_MUSB_HDRC_HCD */
 
 	if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) {
-		DBG(1, "DISCONNECT (%s) as %s, devctl %02x\n",
+		dev_dbg(musb->controller, "DISCONNECT (%s) as %s, devctl %02x\n",
 				otg_state_string(musb->xceiv->state),
 				MUSB_MODE(musb), devctl);
 		handled = IRQ_HANDLED;
@@ -810,13 +804,13 @@ b_host:
 			 * stop the session.
 			 */
 			if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV))
-				DBG(1, "BABBLE devctl: %02x\n", devctl);
+				dev_dbg(musb->controller, "BABBLE devctl: %02x\n", devctl);
 			else {
 				ERR("Stopping host session -- babble\n");
 				musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 			}
 		} else if (is_peripheral_capable()) {
-			DBG(1, "BUS RESET as %s\n",
+			dev_dbg(musb->controller, "BUS RESET as %s\n",
 				otg_state_string(musb->xceiv->state));
 			switch (musb->xceiv->state) {
 #ifdef CONFIG_USB_OTG
@@ -830,7 +824,7 @@ b_host:
 				/* FALLTHROUGH */
 			case OTG_STATE_A_WAIT_BCON:	/* OPT TD.4.7-900ms */
 				/* never use invalid T(a_wait_bcon) */
-				DBG(1, "HNP: in %s, %d msec timeout\n",
+				dev_dbg(musb->controller, "HNP: in %s, %d msec timeout\n",
 					otg_state_string(musb->xceiv->state),
 					TA_WAIT_BCON(musb));
 				mod_timer(&musb->otg_timer, jiffies
@@ -842,7 +836,7 @@ b_host:
 				musb_g_reset(musb);
 				break;
 			case OTG_STATE_B_WAIT_ACON:
-				DBG(1, "HNP: RESET (%s), to b_peripheral\n",
+				dev_dbg(musb->controller, "HNP: RESET (%s), to b_peripheral\n",
 					otg_state_string(musb->xceiv->state));
 				musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 				musb_g_reset(musb);
@@ -855,7 +849,7 @@ b_host:
 				musb_g_reset(musb);
 				break;
 			default:
-				DBG(1, "Unhandled BUS RESET as %s\n",
+				dev_dbg(musb->controller, "Unhandled BUS RESET as %s\n",
 					otg_state_string(musb->xceiv->state));
 			}
 		}
@@ -879,7 +873,7 @@ b_host:
 		u8 epnum;
 		u16 frame;
 
-		DBG(6, "START_OF_FRAME\n");
+		dev_dbg(musb->controller, "START_OF_FRAME\n");
 		handled = IRQ_HANDLED;
 
 		/* start any periodic Tx transfers waiting for current frame */
@@ -921,7 +915,7 @@ void musb_start(struct musb *musb)
 	void __iomem	*regs = musb->mregs;
 	u8		devctl = musb_readb(regs, MUSB_DEVCTL);
 
-	DBG(2, "<== devctl %02x\n", devctl);
+	dev_dbg(musb->controller, "<== devctl %02x\n", devctl);
 
 	/*  Set INT enable registers, enable interrupts */
 	musb_writew(regs, MUSB_INTRTXE, musb->epmask);
@@ -998,7 +992,7 @@ void musb_stop(struct musb *musb)
 	/* stop IRQs, timers, ... */
 	musb_platform_disable(musb);
 	musb_generic_disable(musb);
-	DBG(3, "HDRC disabled\n");
+	dev_dbg(musb->controller, "HDRC disabled\n");
 
 	/* FIXME
 	 *  - mark host and/or peripheral drivers unusable/inactive
@@ -1344,7 +1338,7 @@ static int __init ep_config_from_hw(struct musb *musb)
 	void *mbase = musb->mregs;
 	int ret = 0;
 
-	DBG(2, "<== static silicon ep config\n");
+	dev_dbg(musb->controller, "<== static silicon ep config\n");
 
 	/* FIXME pick up ep0 maxpacket size */
 
@@ -1491,7 +1485,7 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
 #endif
 
 		if (hw_ep->max_packet_sz_tx) {
-			DBG(1,
+			dev_dbg(musb->controller,
 				"%s: hw_ep %d%s, %smax %d\n",
 				musb_driver_name, i,
 				hw_ep->is_shared_fifo ? "shared" : "tx",
@@ -1500,7 +1494,7 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
 				hw_ep->max_packet_sz_tx);
 		}
 		if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) {
-			DBG(1,
+			dev_dbg(musb->controller,
 				"%s: hw_ep %d%s, %smax %d\n",
 				musb_driver_name, i,
 				"rx",
@@ -1509,7 +1503,7 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
 				hw_ep->max_packet_sz_rx);
 		}
 		if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx))
-			DBG(1, "hw_ep %d not configured\n", i);
+			dev_dbg(musb->controller, "hw_ep %d not configured\n", i);
 	}
 
 	return 0;
@@ -1562,14 +1556,14 @@ irqreturn_t musb_interrupt(struct musb *musb)
 	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 	power = musb_readb(musb->mregs, MUSB_POWER);
 
-	DBG(4, "** IRQ %s usb%04x tx%04x rx%04x\n",
+	dev_dbg(musb->controller, "** IRQ %s usb%04x tx%04x rx%04x\n",
 		(devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral",
 		musb->int_usb, musb->int_tx, musb->int_rx);
 
 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 	if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
 		if (!musb->gadget_driver) {
-			DBG(5, "No gadget driver loaded\n");
+			dev_dbg(musb->controller, "No gadget driver loaded\n");
 			return IRQ_HANDLED;
 		}
 #endif
@@ -2060,7 +2054,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 		status = usb_add_hcd(musb_to_hcd(musb), -1, 0);
 
 		hcd->self.uses_pio_for_control = 1;
-		DBG(1, "%s mode, status %d, devctl %02x %c\n",
+		dev_dbg(musb->controller, "%s mode, status %d, devctl %02x %c\n",
 			"HOST", status,
 			musb_readb(musb->mregs, MUSB_DEVCTL),
 			(musb_readb(musb->mregs, MUSB_DEVCTL)
@@ -2074,7 +2068,7 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
 
 		status = musb_gadget_setup(musb);
 
-		DBG(1, "%s mode, status %d, dev%02x\n",
+		dev_dbg(musb->controller, "%s mode, status %d, dev%02x\n",
 			is_otg_enabled(musb) ? "OTG" : "PERIPHERAL",
 			status,
 			musb_readb(musb->mregs, MUSB_DEVCTL));
@@ -2456,8 +2450,8 @@ static int __init musb_init(void)
 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
 		"host"
 #endif
-		", debug=%d\n",
-		musb_driver_name, musb_debug);
+		,
+		musb_driver_name);
 	return platform_driver_probe(&musb_driver, musb_probe);
 }
 
diff --git a/drivers/usb/musb/musb_debug.h b/drivers/usb/musb/musb_debug.h
index f958a49a012..742eada5002 100644
--- a/drivers/usb/musb/musb_debug.h
+++ b/drivers/usb/musb/musb_debug.h
@@ -42,18 +42,6 @@
 #define INFO(fmt, args...) yprintk(KERN_INFO, fmt, ## args)
 #define ERR(fmt, args...) yprintk(KERN_ERR, fmt, ## args)
 
-#define DBG(level, format, args...) do { \
-	if (_dbg_level(level)) \
-		pr_debug("%s %d: " format, __func__, __LINE__, ## args); \
-	} while (0)
-
-extern unsigned musb_debug;
-
-static inline int _dbg_level(unsigned l)
-{
-	return musb_debug >= l;
-}
-
 #ifdef CONFIG_DEBUG_FS
 extern int musb_init_debugfs(struct musb *musb);
 extern void musb_exit_debugfs(struct musb *musb);
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index cfbee4dcfc1..d34ff408c81 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -147,7 +147,8 @@ static inline void unmap_dma_buffer(struct musb_request *request,
 		return;
 
 	if (request->request.dma == DMA_ADDR_INVALID) {
-		DBG(20, "not unmapping a never mapped buffer\n");
+		dev_vdbg(musb->controller,
+				"not unmapping a never mapped buffer\n");
 		return;
 	}
 	if (request->map_state == MUSB_MAPPED) {
@@ -198,11 +199,11 @@ __acquires(ep->musb->lock)
 	spin_unlock(&musb->lock);
 	unmap_dma_buffer(req, musb);
 	if (request->status == 0)
-		DBG(5, "%s done request %p,  %d/%d\n",
+		dev_dbg(musb->controller, "%s done request %p,  %d/%d\n",
 				ep->end_point.name, request,
 				req->request.actual, req->request.length);
 	else
-		DBG(2, "%s request %p, %d/%d fault %d\n",
+		dev_dbg(musb->controller, "%s request %p, %d/%d fault %d\n",
 				ep->end_point.name, request,
 				req->request.actual, req->request.length,
 				request->status);
@@ -219,6 +220,7 @@ __acquires(ep->musb->lock)
  */
 static void nuke(struct musb_ep *ep, const int status)
 {
+	struct musb		*musb = ep->musb;
 	struct musb_request	*req = NULL;
 	void __iomem *epio = ep->musb->endpoints[ep->current_epnum].regs;
 
@@ -246,7 +248,8 @@ static void nuke(struct musb_ep *ep,