These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

3 files changed, 236 insertions, 144 deletions

diff --git a/kernel/drivers/net/irda/ali-ircc.c b/kernel/drivers/net/irda/ali-ircc.c
index 58ae11a14..64bb44d5d 100644
--- a/kernel/drivers/net/irda/ali-ircc.c
+++ b/kernel/drivers/net/irda/ali-ircc.c
@@ -1031,7 +1031,6 @@ static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
 {
 	struct ali_ircc_cb *self = priv;
-	unsigned long flags;
 	int iobase; 
 	int fcr;    /* FIFO control reg */
 	int lcr;    /* Line control reg */
@@ -1061,8 +1060,6 @@ static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
 	/* Update accounting for new speed */
 	self->io.speed = speed;
 
-	spin_lock_irqsave(&self->lock, flags);
-
 	divisor = 115200/speed;
 	
 	fcr = UART_FCR_ENABLE_FIFO;
@@ -1089,9 +1086,6 @@ static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
 	/* without this, the connection will be broken after come back from FIR speed,
 	   but with this, the SIR connection is harder to established */
 	outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
-	
-	spin_unlock_irqrestore(&self->lock, flags);
-	
 }
 
 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
diff --git a/kernel/drivers/net/irda/irda-usb.c b/kernel/drivers/net/irda/irda-usb.c
index f6c916312..25f21968f 100644
--- a/kernel/drivers/net/irda/irda-usb.c
+++ b/kernel/drivers/net/irda/irda-usb.c
@@ -848,7 +848,9 @@ static void irda_usb_receive(struct urb *urb)
 		 * Jean II */
 		self->rx_defer_timer.function = irda_usb_rx_defer_expired;
 		self->rx_defer_timer.data = (unsigned long) urb;
-		mod_timer(&self->rx_defer_timer, jiffies + (10 * HZ / 1000));
+		mod_timer(&self->rx_defer_timer,
+			  jiffies + msecs_to_jiffies(10));
+
 		return;
 	}
 	
diff --git a/kernel/drivers/net/irda/pxaficp_ir.c b/kernel/drivers/net/irda/pxaficp_ir.c
index 100454662..6e8f616be 100644
--- a/kernel/drivers/net/irda/pxaficp_ir.c
+++ b/kernel/drivers/net/irda/pxaficp_ir.c
@@ -19,6 +19,9 @@
 #include <linux/etherdevice.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <linux/dma/pxa-dma.h>
 #include <linux/gpio.h>
 #include <linux/slab.h>
 
@@ -27,18 +30,17 @@
 #include <net/irda/wrapper.h>
 #include <net/irda/irda_device.h>
 
-#include <mach/dma.h>
 #include <linux/platform_data/irda-pxaficp.h>
-#include <mach/regs-ost.h>
+#undef __REG
+#define __REG(x) ((x) & 0xffff)
 #include <mach/regs-uart.h>
 
-#define FICP		__REG(0x40800000)  /* Start of FICP area */
-#define ICCR0		__REG(0x40800000)  /* ICP Control Register 0 */
-#define ICCR1		__REG(0x40800004)  /* ICP Control Register 1 */
-#define ICCR2		__REG(0x40800008)  /* ICP Control Register 2 */
-#define ICDR		__REG(0x4080000c)  /* ICP Data Register */
-#define ICSR0		__REG(0x40800014)  /* ICP Status Register 0 */
-#define ICSR1		__REG(0x40800018)  /* ICP Status Register 1 */
+#define ICCR0		0x0000		/* ICP Control Register 0 */
+#define ICCR1		0x0004		/* ICP Control Register 1 */
+#define ICCR2		0x0008		/* ICP Control Register 2 */
+#define ICDR		0x000c		/* ICP Data Register */
+#define ICSR0		0x0014		/* ICP Status Register 0 */
+#define ICSR1		0x0018		/* ICP Status Register 1 */
 
 #define ICCR0_AME	(1 << 7)	/* Address match enable */
 #define ICCR0_TIE	(1 << 6)	/* Transmit FIFO interrupt enable */
@@ -56,9 +58,7 @@
 #define ICCR2_TRIG_16   (1 << 0)	/*	>= 16 bytes */
 #define ICCR2_TRIG_32   (2 << 0)	/*	>= 32 bytes */
 
-#ifdef CONFIG_PXA27x
 #define ICSR0_EOC	(1 << 6)	/* DMA End of Descriptor Chain */
-#endif
 #define ICSR0_FRE	(1 << 5)	/* Framing error */
 #define ICSR0_RFS	(1 << 4)	/* Receive FIFO service request */
 #define ICSR0_TFS	(1 << 3)	/* Transnit FIFO service request */
@@ -99,18 +99,61 @@
                 IrSR_RCVEIR_UART_MODE | \
                 IrSR_XMITIR_IR_MODE)
 
+/* macros for registers read/write */
+#define ficp_writel(irda, val, off)					\
+	do {								\
+		dev_vdbg(irda->dev,					\
+			 "%s():%d ficp_writel(0x%x, %s)\n",		\
+			 __func__, __LINE__, (val), #off);		\
+		writel_relaxed((val), (irda)->irda_base + (off));	\
+	} while (0)
+
+#define ficp_readl(irda, off)						\
+	({								\
+		unsigned int _v;					\
+		_v = readl_relaxed((irda)->irda_base + (off));		\
+		dev_vdbg(irda->dev,					\
+			 "%s():%d ficp_readl(%s): 0x%x\n",		\
+			 __func__, __LINE__, #off, _v);			\
+		_v;							\
+	})
+
+#define stuart_writel(irda, val, off)					\
+	do {								\
+		dev_vdbg(irda->dev,					\
+			 "%s():%d stuart_writel(0x%x, %s)\n",		\
+			 __func__, __LINE__, (val), #off);		\
+		writel_relaxed((val), (irda)->stuart_base + (off));	\
+	} while (0)
+
+#define stuart_readl(irda, off)						\
+	({								\
+		unsigned int _v;					\
+		_v = readl_relaxed((irda)->stuart_base + (off));	\
+		dev_vdbg(irda->dev,					\
+			 "%s():%d stuart_readl(%s): 0x%x\n",		\
+			 __func__, __LINE__, #off, _v);			\
+		_v;							\
+	})
+
 struct pxa_irda {
 	int			speed;
 	int			newspeed;
-	unsigned long		last_oscr;
+	unsigned long long	last_clk;
 
+	void __iomem		*stuart_base;
+	void __iomem		*irda_base;
 	unsigned char		*dma_rx_buff;
 	unsigned char		*dma_tx_buff;
 	dma_addr_t		dma_rx_buff_phy;
 	dma_addr_t		dma_tx_buff_phy;
 	unsigned int		dma_tx_buff_len;
-	int			txdma;
-	int			rxdma;
+	struct dma_chan		*txdma;
+	struct dma_chan		*rxdma;
+	dma_cookie_t		rx_cookie;
+	dma_cookie_t		tx_cookie;
+	int			drcmr_rx;
+	int			drcmr_tx;
 
 	int			uart_irq;
 	int			icp_irq;
@@ -128,6 +171,8 @@ struct pxa_irda {
 	struct clk		*cur_clk;
 };
 
+static int pxa_irda_set_speed(struct pxa_irda *si, int speed);
+
 static inline void pxa_irda_disable_clk(struct pxa_irda *si)
 {
 	if (si->cur_clk)
@@ -151,22 +196,41 @@ static inline void pxa_irda_enable_sirclk(struct pxa_irda *si)
 #define IS_FIR(si)		((si)->speed >= 4000000)
 #define IRDA_FRAME_SIZE_LIMIT	2047
 
+static void pxa_irda_fir_dma_rx_irq(void *data);
+static void pxa_irda_fir_dma_tx_irq(void *data);
+
 inline static void pxa_irda_fir_dma_rx_start(struct pxa_irda *si)
 {
-	DCSR(si->rxdma)  = DCSR_NODESC;
-	DSADR(si->rxdma) = __PREG(ICDR);
-	DTADR(si->rxdma) = si->dma_rx_buff_phy;
-	DCMD(si->rxdma) = DCMD_INCTRGADDR | DCMD_FLOWSRC |  DCMD_WIDTH1 | DCMD_BURST32 | IRDA_FRAME_SIZE_LIMIT;
-	DCSR(si->rxdma) |= DCSR_RUN;
+	struct dma_async_tx_descriptor *tx;
+
+	tx = dmaengine_prep_slave_single(si->rxdma, si->dma_rx_buff_phy,
+					 IRDA_FRAME_SIZE_LIMIT, DMA_FROM_DEVICE,
+					 DMA_PREP_INTERRUPT);
+	if (!tx) {
+		dev_err(si->dev, "prep_slave_sg() failed\n");
+		return;
+	}
+	tx->callback = pxa_irda_fir_dma_rx_irq;
+	tx->callback_param = si;
+	si->rx_cookie = dmaengine_submit(tx);
+	dma_async_issue_pending(si->rxdma);
 }
 
 inline static void pxa_irda_fir_dma_tx_start(struct pxa_irda *si)
 {
-	DCSR(si->txdma)  = DCSR_NODESC;
-	DSADR(si->txdma) = si->dma_tx_buff_phy;
-	DTADR(si->txdma) = __PREG(ICDR);
-	DCMD(si->txdma) = DCMD_INCSRCADDR | DCMD_FLOWTRG |  DCMD_ENDIRQEN | DCMD_WIDTH1 | DCMD_BURST32 | si->dma_tx_buff_len;
-	DCSR(si->txdma) |= DCSR_RUN;
+	struct dma_async_tx_descriptor *tx;
+
+	tx = dmaengine_prep_slave_single(si->txdma, si->dma_tx_buff_phy,
+					 si->dma_tx_buff_len, DMA_TO_DEVICE,
+					 DMA_PREP_INTERRUPT);
+	if (!tx) {
+		dev_err(si->dev, "prep_slave_sg() failed\n");
+		return;
+	}
+	tx->callback = pxa_irda_fir_dma_tx_irq;
+	tx->callback_param = si;
+	si->tx_cookie = dmaengine_submit(tx);
+	dma_async_issue_pending(si->rxdma);
 }
 
 /*
@@ -205,9 +269,9 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
 
 		if (IS_FIR(si)) {
 			/* stop RX DMA */
-			DCSR(si->rxdma) &= ~DCSR_RUN;
+			dmaengine_terminate_all(si->rxdma);
 			/* disable FICP */
-			ICCR0 = 0;
+			ficp_writel(si, 0, ICCR0);
 			pxa_irda_disable_clk(si);
 
 			/* set board transceiver to SIR mode */
@@ -218,17 +282,19 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
 		}
 
 		/* disable STUART first */
-		STIER = 0;
+		stuart_writel(si, 0, STIER);
 
 		/* access DLL & DLH */
-		STLCR |= LCR_DLAB;
-		STDLL = divisor & 0xff;
-		STDLH = divisor >> 8;
-		STLCR &= ~LCR_DLAB;
+		stuart_writel(si, stuart_readl(si, STLCR) | LCR_DLAB, STLCR);
+		stuart_writel(si, divisor & 0xff, STDLL);
+		stuart_writel(si, divisor >> 8, STDLH);
+		stuart_writel(si, stuart_readl(si, STLCR) & ~LCR_DLAB, STLCR);
 
 		si->speed = speed;
-		STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
-		STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
+		stuart_writel(si, IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6,
+			      STISR);
+		stuart_writel(si, IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE,
+			      STIER);
 
 		local_irq_restore(flags);
 		break;
@@ -237,12 +303,12 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
 		local_irq_save(flags);
 
 		/* disable STUART */
-		STIER = 0;
-		STISR = 0;
+		stuart_writel(si, 0, STIER);
+		stuart_writel(si, 0, STISR);
 		pxa_irda_disable_clk(si);
 
 		/* disable FICP first */
-		ICCR0 = 0;
+		ficp_writel(si, 0, ICCR0);
 
 		/* set board transceiver to FIR mode */
 		pxa_irda_set_mode(si, IR_FIRMODE);
@@ -252,7 +318,7 @@ static int pxa_irda_set_speed(struct pxa_irda *si, int speed)
 
 		si->speed = speed;
 		pxa_irda_fir_dma_rx_start(si);
-		ICCR0 = ICCR0_ITR | ICCR0_RXE;
+		ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);
 
 		local_irq_restore(flags);
 		break;
@@ -271,13 +337,13 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
 	struct pxa_irda *si = netdev_priv(dev);
 	int iir, lsr, data;
 
-	iir = STIIR;
+	iir = stuart_readl(si, STIIR);
 
 	switch  (iir & 0x0F) {
 	case 0x06: /* Receiver Line Status */
-	  	lsr = STLSR;
+		lsr = stuart_readl(si, STLSR);
 		while (lsr & LSR_FIFOE) {
-			data = STRBR;
+			data = stuart_readl(si, STRBR);
 			if (lsr & (LSR_OE | LSR_PE | LSR_FE | LSR_BI)) {
 				printk(KERN_DEBUG "pxa_ir: sir receiving error\n");
 				dev->stats.rx_errors++;
@@ -290,9 +356,9 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
 				async_unwrap_char(dev, &dev->stats,
 						  &si->rx_buff, data);
 			}
-			lsr = STLSR;
+			lsr = stuart_readl(si, STLSR);
 		}
-		si->last_oscr = readl_relaxed(OSCR);
+		si->last_clk = sched_clock();
 		break;
 
 	case 0x04: /* Received Data Available */
@@ -301,14 +367,16 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
 	case 0x0C: /* Character Timeout Indication */
 	  	do  {
 		    dev->stats.rx_bytes++;
-	            async_unwrap_char(dev, &dev->stats, &si->rx_buff, STRBR);
-	  	} while (STLSR & LSR_DR);
-		si->last_oscr = readl_relaxed(OSCR);
+		    async_unwrap_char(dev, &dev->stats, &si->rx_buff,
+				      stuart_readl(si, STRBR));
+		} while (stuart_readl(si, STLSR) & LSR_DR);
+		si->last_clk = sched_clock();
 	  	break;
 
 	case 0x02: /* Transmit FIFO Data Request */
-	    	while ((si->tx_buff.len) && (STLSR & LSR_TDRQ)) {
-	    		STTHR = *si->tx_buff.data++;
+		while ((si->tx_buff.len) &&
+		       (stuart_readl(si, STLSR) & LSR_TDRQ)) {
+			stuart_writel(si, *si->tx_buff.data++, STTHR);
 			si->tx_buff.len -= 1;
 	    	}
 
@@ -317,9 +385,9 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
 			dev->stats.tx_bytes += si->tx_buff.data - si->tx_buff.head;
 
                         /* We need to ensure that the transmitter has finished. */
-			while ((STLSR & LSR_TEMT) == 0)
+			while ((stuart_readl(si, STLSR) & LSR_TEMT) == 0)
 				cpu_relax();
-			si->last_oscr = readl_relaxed(OSCR);
+			si->last_clk = sched_clock();
 
 			/*
 		 	* Ok, we've finished transmitting.  Now enable
@@ -331,9 +399,11 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
 				si->newspeed = 0;
 			} else {
 				/* enable IR Receiver, disable IR Transmitter */
-				STISR = IrSR_IR_RECEIVE_ON | IrSR_XMODE_PULSE_1_6;
+				stuart_writel(si, IrSR_IR_RECEIVE_ON |
+					      IrSR_XMODE_PULSE_1_6, STISR);
 				/* enable STUART and receive interrupts */
-				STIER = IER_UUE | IER_RLSE | IER_RAVIE | IER_RTIOE;
+				stuart_writel(si, IER_UUE | IER_RLSE |
+					      IER_RAVIE | IER_RTIOE, STIER);
 			}
 			/* I'm hungry! */
 			netif_wake_queue(dev);
@@ -345,35 +415,32 @@ static irqreturn_t pxa_irda_sir_irq(int irq, void *dev_id)
 }
 
 /* FIR Receive DMA interrupt handler */
-static void pxa_irda_fir_dma_rx_irq(int channel, void *data)
+static void pxa_irda_fir_dma_rx_irq(void *data)
 {
-	int dcsr = DCSR(channel);
-
-	DCSR(channel) = dcsr & ~DCSR_RUN;
+	struct net_device *dev = data;
+	struct pxa_irda *si = netdev_priv(dev);
 
-	printk(KERN_DEBUG "pxa_ir: fir rx dma bus error %#x\n", dcsr);
+	dmaengine_terminate_all(si->rxdma);
+	netdev_dbg(dev, "pxa_ir: fir rx dma bus error\n");
 }
 
 /* FIR Transmit DMA interrupt handler */
-static void pxa_irda_fir_dma_tx_irq(int channel, void *data)
+static void pxa_irda_fir_dma_tx_irq(void *data)
 {
 	struct net_device *dev = data;
 	struct pxa_irda *si = netdev_priv(dev);
-	int dcsr;
-
-	dcsr = DCSR(channel);
-	DCSR(channel) = dcsr & ~DCSR_RUN;
 
-	if (dcsr & DCSR_ENDINTR)  {
+	dmaengine_terminate_all(si->txdma);
+	if (dmaengine_tx_status(si->txdma, si->tx_cookie, NULL) == DMA_ERROR) {
+		dev->stats.tx_errors++;
+	} else {
 		dev->stats.tx_packets++;
 		dev->stats.tx_bytes += si->dma_tx_buff_len;
-	} else {
-		dev->stats.tx_errors++;
 	}
 
-	while (ICSR1 & ICSR1_TBY)
+	while (ficp_readl(si, ICSR1) & ICSR1_TBY)
 		cpu_relax();
-	si->last_oscr = readl_relaxed(OSCR);
+	si->last_clk = sched_clock();
 
 	/*
 	 * HACK: It looks like the TBY bit is dropped too soon.
@@ -387,11 +454,11 @@ static void pxa_irda_fir_dma_tx_irq(int channel, void *data)
 	} else {
 		int i = 64;
 
-		ICCR0 = 0;
+		ficp_writel(si, 0, ICCR0);
 		pxa_irda_fir_dma_rx_start(si);
-		while ((ICSR1 & ICSR1_RNE) && i--)
-			(void)ICDR;
-		ICCR0 = ICCR0_ITR | ICCR0_RXE;
+		while ((ficp_readl(si, ICSR1) & ICSR1_RNE) && i--)
+			ficp_readl(si, ICDR);
+		ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);
 
 		if (i < 0)
 			printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n");
@@ -403,15 +470,18 @@ static void pxa_irda_fir_dma_tx_irq(int channel, void *data)
 static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, int icsr0)
 {
 	unsigned int len, stat, data;
+	struct dma_tx_state state;
 
 	/* Get the current data position. */
-	len = DTADR(si->rxdma) - si->dma_rx_buff_phy;
+
+	dmaengine_tx_status(si->rxdma, si->rx_cookie, &state);
+	len = IRDA_FRAME_SIZE_LIMIT - state.residue;
 
 	do {
 		/* Read Status, and then Data. 	 */
-		stat = ICSR1;
+		stat = ficp_readl(si, ICSR1);
 		rmb();
-		data = ICDR;
+		data = ficp_readl(si, ICDR);
 
 		if (stat & (ICSR1_CRE | ICSR1_ROR)) {
 			dev->stats.rx_errors++;
@@ -429,7 +499,7 @@ static void pxa_irda_fir_irq_eif(struct pxa_irda *si, struct net_device *dev, in
 		/* If we hit the end of frame, there's no point in continuing. */
 		if (stat & ICSR1_EOF)
 			break;
-	} while (ICSR0 & ICSR0_EIF);
+	} while (ficp_readl(si, ICSR0) & ICSR0_EIF);
 
 	if (stat & ICSR1_EOF) {
 		/* end of frame. */
@@ -472,9 +542,9 @@ static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id)
 	int icsr0, i = 64;
 
 	/* stop RX DMA */
-	DCSR(si->rxdma) &= ~DCSR_RUN;
-	si->last_oscr = readl_relaxed(OSCR);
-	icsr0 = ICSR0;
+	dmaengine_terminate_all(si->rxdma);
+	si->last_clk = sched_clock();
+	icsr0 = ficp_readl(si, ICSR0);
 
 	if (icsr0 & (ICSR0_FRE | ICSR0_RAB)) {
 		if (icsr0 & ICSR0_FRE) {
@@ -484,7 +554,7 @@ static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id)
 			printk(KERN_DEBUG "pxa_ir: fir receive abort\n");
 			dev->stats.rx_errors++;
 		}
-		ICSR0 = icsr0 & (ICSR0_FRE | ICSR0_RAB);
+		ficp_writel(si, icsr0 & (ICSR0_FRE | ICSR0_RAB), ICSR0);
 	}
 
 	if (icsr0 & ICSR0_EIF) {
@@ -492,11 +562,11 @@ static irqreturn_t pxa_irda_fir_irq(int irq, void *dev_id)
 		pxa_irda_fir_irq_eif(si, dev, icsr0);
 	}
 
-	ICCR0 = 0;
+	ficp_writel(si, 0, ICCR0);
 	pxa_irda_fir_dma_rx_start(si);
-	while ((ICSR1 & ICSR1_RNE) && i--)
-		(void)ICDR;
-	ICCR0 = ICCR0_ITR | ICCR0_RXE;
+	while ((ficp_readl(si, ICSR1) & ICSR1_RNE) && i--)
+		ficp_readl(si, ICDR);
+	ficp_writel(si, ICCR0_ITR | ICCR0_RXE, ICCR0);
 
 	if (i < 0)
 		printk(KERN_ERR "pxa_ir: cannot clear Rx FIFO!\n");
@@ -537,11 +607,12 @@ static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
 		si->tx_buff.len  = async_wrap_skb(skb, si->tx_buff.data, si->tx_buff.truesize);
 
 		/* Disable STUART interrupts and switch to transmit mode. */
-		STIER = 0;
-		STISR = IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6;
+		stuart_writel(si, 0, STIER);
+		stuart_writel(si, IrSR_IR_TRANSMIT_ON | IrSR_XMODE_PULSE_1_6,
+			      STISR);
 
 		/* enable STUART and transmit interrupts */
-		STIER = IER_UUE | IER_TIE;
+		stuart_writel(si, IER_UUE | IER_TIE, STIER);
 	} else {
 		unsigned long mtt = irda_get_mtt(skb);
 
@@ -549,15 +620,15 @@ static int pxa_irda_hard_xmit(struct sk_buff *skb, struct net_device *dev)
 		skb_copy_from_linear_data(skb, si->dma_tx_buff, skb->len);
 
 		if (mtt)
-			while ((unsigned)(readl_relaxed(OSCR) - si->last_oscr)/4 < mtt)
+			while ((sched_clock() - si->last_clk) * 1000 < mtt)
 				cpu_relax();
 
 		/* stop RX DMA,  disable FICP */
-		DCSR(si->rxdma) &= ~DCSR_RUN;
-		ICCR0 = 0;
+		dmaengine_terminate_all(si->rxdma);
+		ficp_writel(si, 0, ICCR0);
 
 		pxa_irda_fir_dma_tx_start(si);
-		ICCR0 = ICCR0_ITR | ICCR0_TXE;
+		ficp_writel(si, ICCR0_ITR | ICCR0_TXE, ICCR0);
 	}
 
 	dev_kfree_skb(skb);
@@ -613,22 +684,18 @@ static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)
 static void pxa_irda_startup(struct pxa_irda *si)
 {
 	/* Disable STUART interrupts */
-	STIER = 0;
+	stuart_writel(si, 0, STIER);
 	/* enable STUART interrupt to the processor */
-	STMCR = MCR_OUT2;
+	stuart_writel(si, MCR_OUT2, STMCR);
 	/* configure SIR frame format: StartBit - Data 7 ... Data 0 - Stop Bit */
-	STLCR = LCR_WLS0 | LCR_WLS1;
+	stuart_writel(si, LCR_WLS0 | LCR_WLS1, STLCR);
 	/* enable FIFO, we use FIFO to improve performance */
-	STFCR = FCR_TRFIFOE | FCR_ITL_32;
+	stuart_writel(si, FCR_TRFIFOE | FCR_ITL_32, STFCR);
 
 	/* disable FICP */
-	ICCR0 = 0;
+	ficp_writel(si, 0, ICCR0);
 	/* configure FICP ICCR2 */
-	ICCR2 = ICCR2_TXP | ICCR2_TRIG_32;
-
-	/* configure DMAC */
-	DRCMR(17) = si->rxdma | DRCMR_MAPVLD;
-	DRCMR(18) = si->txdma | DRCMR_MAPVLD;
+	ficp_writel(si, ICCR2_TXP | ICCR2_TRIG_32, ICCR2);
 
 	/* force SIR reinitialization */
 	si->speed = 4000000;
@@ -644,22 +711,19 @@ static void pxa_irda_shutdown(struct pxa_irda *si)
 	local_irq_save(flags);
 
 	/* disable STUART and interrupt */
-	STIER = 0;
+	stuart_writel(si, 0, STIER);
 	/* disable STUART SIR mode */
-	STISR = 0;
+	stuart_writel(si, 0, STISR);
 
 	/* disable DMA */
-	DCSR(si->txdma) &= ~DCSR_RUN;
-	DCSR(si->rxdma) &= ~DCSR_RUN;
+	dmaengine_terminate_all(si->rxdma);
+	dmaengine_terminate_all(si->txdma);
 	/* disable FICP */
-	ICCR0 = 0;
+	ficp_writel(si, 0, ICCR0);
 
 	/* disable the STUART or FICP clocks */
 	pxa_irda_disable_clk(si);
 
-	DRCMR(17) = 0;
-	DRCMR(18) = 0;
-
 	local_irq_restore(flags);
 
 	/* power off board transceiver */
@@ -671,6 +735,9 @@ static void pxa_irda_shutdown(struct pxa_irda *si)
 static int pxa_irda_start(struct net_device *dev)
 {
 	struct pxa_irda *si = netdev_priv(dev);
+	dma_cap_mask_t mask;
+	struct dma_slave_config	config;
+	struct pxad_param param;
 	int err;
 
 	si->speed = 9600;
@@ -690,14 +757,37 @@ static int pxa_irda_start(struct net_device *dev)
 	disable_irq(si->icp_irq);
 
 	err = -EBUSY;
-	si->rxdma = pxa_request_dma("FICP_RX",DMA_PRIO_LOW, pxa_irda_fir_dma_rx_irq, dev);
-	if (si->rxdma < 0)
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+	param.prio = PXAD_PRIO_LOWEST;
+
+	memset(&config, 0, sizeof(config));
+	config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
+	config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
+	config.src_addr = (dma_addr_t)si->irda_base + ICDR;
+	config.dst_addr = (dma_addr_t)si->irda_base + ICDR;
+	config.src_maxburst = 32;
+	config.dst_maxburst = 32;
+
+	param.drcmr = si->drcmr_rx;
+	si->rxdma = dma_request_slave_channel_compat(mask, pxad_filter_fn,
+						     &param, &dev->dev, "rx");
+	if (!si->rxdma)
 		goto err_rx_dma;
 
-	si->txdma = pxa_request_dma("FICP_TX",DMA_PRIO_LOW, pxa_irda_fir_dma_tx_irq, dev);
-	if (si->txdma < 0)
+	param.drcmr = si->drcmr_tx;
+	si->txdma = dma_request_slave_channel_compat(mask, pxad_filter_fn,
+						     &param, &dev->dev, "tx");
+	if (!si->txdma)
 		goto err_tx_dma;
 
+	err = dmaengine_slave_config(si->rxdma, &config);
+	if (err)
+		goto err_dma_rx_buff;
+	err = dmaengine_slave_config(si->txdma, &config);
+	if (err)
+		goto err_dma_rx_buff;
+
 	err = -ENOMEM;
 	si->dma_rx_buff = dma_alloc_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT,
 					     &si->dma_rx_buff_phy, GFP_KERNEL);
@@ -737,9 +827,9 @@ err_irlap:
 err_dma_tx_buff:
 	dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_rx_buff, si->dma_rx_buff_phy);
 err_dma_rx_buff:
-	pxa_free_dma(si->txdma);
+	dma_release_channel(si->txdma);
 err_tx_dma:
-	pxa_free_dma(si->rxdma);
+	dma_release_channel(si->rxdma);
 err_rx_dma:
 	free_irq(si->icp_irq, dev);
 err_irq2:
@@ -766,8 +856,10 @@ static int pxa_irda_stop(struct net_device *dev)
 	free_irq(si->uart_irq, dev);
 	free_irq(si->icp_irq, dev);
 
-	pxa_free_dma(si->rxdma);
-	pxa_free_dma(si->txdma);
+	dmaengine_terminate_all(si->rxdma);
+	dmaengine_terminate_all(si->txdma);
+	dma_release_channel(si->rxdma);
+	dma_release_channel(si->txdma);
 
 	if (si->dma_rx_buff)
 		dma_free_coherent(si->dev, IRDA_FRAME_SIZE_LIMIT, si->dma_tx_buff, si->dma_tx_buff_phy);
@@ -830,25 +922,33 @@ static const struct net_device_ops pxa_irda_netdev_ops = {
 static int pxa_irda_probe(struct platform_device *pdev)
 {
 	struct net_device *dev;
+	struct resource *res;
 	struct pxa_irda *si;
+	void __iomem *ficp, *stuart;
 	unsigned int baudrate_mask;
 	int err;
 
 	if (!pdev->dev.platform_data)
 		return -ENODEV;
 
-	err = request_mem_region(__PREG(STUART), 0x24, "IrDA") ? 0 : -EBUSY;
-	if (err)
-		goto err_mem_1;
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ficp = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(ficp)) {
+		dev_err(&pdev->dev, "resource ficp not defined\n");
+		return PTR_ERR(ficp);
+	}
 
-	err = request_mem_region(__PREG(FICP), 0x1c, "IrDA") ? 0 : -EBUSY;
-	if (err)
-		goto err_mem_2;
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	stuart = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(stuart)) {
+		dev_err(&pdev->dev, "resource stuart not defined\n");
+		return PTR_ERR(stuart);
+	}
 
 	dev = alloc_irdadev(sizeof(struct pxa_irda));
 	if (!dev) {
 		err = -ENOMEM;
-		goto err_mem_3;
+		goto err_mem_1;
 	}
 
 	SET_NETDEV_DEV(dev, &pdev->dev);
@@ -856,16 +956,25 @@ static int pxa_irda_probe(struct platform_device *pdev)
 	si->dev = &pdev->dev;
 	si->pdata = pdev->dev.platform_data;
 
+	si->irda_base = ficp;
+	si->stuart_base = stuart;
 	si->uart_irq = platform_get_irq(pdev, 0);
 	si->icp_irq = platform_get_irq(pdev, 1);
 
-	si->sir_clk = clk_get(&pdev->dev, "UARTCLK");
-	si->fir_clk = clk_get(&pdev->dev, "FICPCLK");
+	si->sir_clk = devm_clk_get(&pdev->dev, "UARTCLK");
+	si->fir_clk = devm_clk_get(&pdev->dev, "FICPCLK");
 	if (IS_ERR(si->sir_clk) || IS_ERR(si->fir_clk)) {
 		err = PTR_ERR(IS_ERR(si->sir_clk) ? si->sir_clk : si->fir_clk);
 		goto err_mem_4;
 	}
 
+	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+	if (res)
+		si->drcmr_rx = res->start;
+	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+	if (res)
+		si->drcmr_tx = res->start;
+
 	/*
 	 * Initialise the SIR buffers
 	 */
@@ -925,15 +1034,7 @@ err_startup:
 err_mem_5:
 		kfree(si->rx_buff.head);
 err_mem_4:
-		if (si->sir_clk && !IS_ERR(si->sir_clk))
-			clk_put(si->sir_clk);
-		if (si->fir_clk && !IS_ERR(si->fir_clk))
-			clk_put(si->fir_clk);
 		free_netdev(dev);
-err_mem_3:
-		release_mem_region(__PREG(FICP), 0x1c);
-err_mem_2:
-		release_mem_region(__PREG(STUART), 0x24);
 	}
 err_mem_1:
 	return err;
@@ -952,14 +1053,9 @@ static int pxa_irda_remove(struct platform_device *_dev)
 			si->pdata->shutdown(si->dev);
 		kfree(si->tx_buff.head);
 		kfree(si->rx_buff.head);
-		clk_put(si->fir_clk);
-		clk_put(si->sir_clk);
 		free_netdev(dev);
 	}
 
-	release_mem_region(__PREG(STUART), 0x24);
-	release_mem_region(__PREG(FICP), 0x1c);
-
 	return 0;
 }