2 files changed, 265 insertions, 307 deletions

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 3e8dcf8d2e05..50e08f03aa65 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -17,10 +17,12 @@
 #include <linux/ioport.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
+#include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
 #include <linux/spinlock.h>
 #include <linux/timer.h>
+#include <linux/omap-dma.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
 #include <linux/clk.h>
@@ -128,6 +130,10 @@ struct mmc_omap_host {
 	unsigned char		id; /* 16xx chips have 2 MMC blocks */
 	struct clk *		iclk;
 	struct clk *		fclk;
+	struct dma_chan		*dma_rx;
+	u32			dma_rx_burst;
+	struct dma_chan		*dma_tx;
+	u32			dma_tx_burst;
 	struct resource		*mem_res;
 	void __iomem		*virt_base;
 	unsigned int		phys_base;
@@ -153,12 +159,8 @@ struct mmc_omap_host {
 
 	unsigned		use_dma:1;
 	unsigned		brs_received:1, dma_done:1;
-	unsigned		dma_is_read:1;
 	unsigned		dma_in_use:1;
-	int			dma_ch;
 	spinlock_t		dma_lock;
-	struct timer_list	dma_timer;
-	unsigned		dma_len;
 
 	struct mmc_omap_slot    *slots[OMAP_MMC_MAX_SLOTS];
 	struct mmc_omap_slot    *current_slot;
@@ -406,18 +408,25 @@ mmc_omap_release_dma(struct mmc_omap_host *host, struct mmc_data *data,
 		     int abort)
 {
 	enum dma_data_direction dma_data_dir;
+	struct device *dev = mmc_dev(host->mmc);
+	struct dma_chan *c;
 
-	BUG_ON(host->dma_ch < 0);
-	if (data->error)
-		omap_stop_dma(host->dma_ch);
-	/* Release DMA channel lazily */
-	mod_timer(&host->dma_timer, jiffies + HZ);
-	if (data->flags & MMC_DATA_WRITE)
+	if (data->flags & MMC_DATA_WRITE) {
 		dma_data_dir = DMA_TO_DEVICE;
-	else
+		c = host->dma_tx;
+	} else {
 		dma_data_dir = DMA_FROM_DEVICE;
-	dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
-		     dma_data_dir);
+		c = host->dma_rx;
+	}
+	if (c) {
+		if (data->error) {
+			dmaengine_terminate_all(c);
+			/* Claim nothing transferred on error... */
+			data->bytes_xfered = 0;
+		}
+		dev = c->device->dev;
+	}
+	dma_unmap_sg(dev, data->sg, host->sg_len, dma_data_dir);
 }
 
 static void mmc_omap_send_stop_work(struct work_struct *work)
@@ -525,16 +534,6 @@ mmc_omap_end_of_data(struct mmc_omap_host *host, struct mmc_data *data)
 }
 
 static void
-mmc_omap_dma_timer(unsigned long data)
-{
-	struct mmc_omap_host *host = (struct mmc_omap_host *) data;
-
-	BUG_ON(host->dma_ch < 0);
-	omap_free_dma(host->dma_ch);
-	host->dma_ch = -1;
-}
-
-static void
 mmc_omap_dma_done(struct mmc_omap_host *host, struct mmc_data *data)
 {
 	unsigned long flags;
@@ -891,159 +890,15 @@ static void mmc_omap_cover_handler(unsigned long param)
 		  jiffies + msecs_to_jiffies(OMAP_MMC_COVER_POLL_DELAY));
 }
 
-/* Prepare to transfer the next segment of a scatterlist */
-static void
-mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
+static void mmc_omap_dma_callback(void *priv)
 {
-	int dma_ch = host->dma_ch;
-	unsigned long data_addr;
-	u16 buf, frame;
-	u32 count;
-	struct scatterlist *sg = &data->sg[host->sg_idx];
-	int src_port = 0;
-	int dst_port = 0;
-	int sync_dev = 0;
-
-	data_addr = host->phys_base + OMAP_MMC_REG(host, DATA);
-	frame = data->blksz;
-	count = sg_dma_len(sg);
-
-	if ((data->blocks == 1) && (count > data->blksz))
-		count = frame;
-
-	host->dma_len = count;
-
-	/* FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx and 24xx.
-	 * Use 16 or 32 word frames when the blocksize is at least that large.
-	 * Blocksize is usually 512 bytes; but not for some SD reads.
-	 */
-	if (cpu_is_omap15xx() && frame > 32)
-		frame = 32;
-	else if (frame > 64)
-		frame = 64;
-	count /= frame;
-	frame >>= 1;
-
-	if (!(data->flags & MMC_DATA_WRITE)) {
-		buf = 0x800f | ((frame - 1) << 8);
-
-		if (cpu_class_is_omap1()) {
-			src_port = OMAP_DMA_PORT_TIPB;
-			dst_port = OMAP_DMA_PORT_EMIFF;
-		}
-		if (cpu_is_omap24xx())
-			sync_dev = OMAP24XX_DMA_MMC1_RX;
-
-		omap_set_dma_src_params(dma_ch, src_port,
-					OMAP_DMA_AMODE_CONSTANT,
-					data_addr, 0, 0);
-		omap_set_dma_dest_params(dma_ch, dst_port,
-					 OMAP_DMA_AMODE_POST_INC,
-					 sg_dma_address(sg), 0, 0);
-		omap_set_dma_dest_data_pack(dma_ch, 1);
-		omap_set_dma_dest_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
-	} else {
-		buf = 0x0f80 | ((frame - 1) << 0);
-
-		if (cpu_class_is_omap1()) {
-			src_port = OMAP_DMA_PORT_EMIFF;
-			dst_port = OMAP_DMA_PORT_TIPB;
-		}
-		if (cpu_is_omap24xx())
-			sync_dev = OMAP24XX_DMA_MMC1_TX;
-
-		omap_set_dma_dest_params(dma_ch, dst_port,
-					 OMAP_DMA_AMODE_CONSTANT,
-					 data_addr, 0, 0);
-		omap_set_dma_src_params(dma_ch, src_port,
-					OMAP_DMA_AMODE_POST_INC,
-					sg_dma_address(sg), 0, 0);
-		omap_set_dma_src_data_pack(dma_ch, 1);
-		omap_set_dma_src_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
-	}
+	struct mmc_omap_host *host = priv;
+	struct mmc_data *data = host->data;
 
-	/* Max limit for DMA frame count is 0xffff */
-	BUG_ON(count > 0xffff);
+	/* If we got to the end of DMA, assume everything went well */
+	data->bytes_xfered += data->blocks * data->blksz;
 
-	OMAP_MMC_WRITE(host, BUF, buf);
-	omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S16,
-				     frame, count, OMAP_DMA_SYNC_FRAME,
-				     sync_dev, 0);
-}
-
-/* A scatterlist segment completed */
-static void mmc_omap_dma_cb(int lch, u16 ch_status, void *data)
-{
-	struct mmc_omap_host *host = (struct mmc_omap_host *) data;
-	struct mmc_data *mmcdat = host->data;
-
-	if (unlikely(host->dma_ch < 0)) {
-		dev_err(mmc_dev(host->mmc),
-			"DMA callback while DMA not enabled\n");
-		return;
-	}
-	/* FIXME: We really should do something to _handle_ the errors */
-	if (ch_status & OMAP1_DMA_TOUT_IRQ) {
-		dev_err(mmc_dev(host->mmc),"DMA timeout\n");
-		return;
-	}
-	if (ch_status & OMAP_DMA_DROP_IRQ) {
-		dev_err(mmc_dev(host->mmc), "DMA sync error\n");
-		return;
-	}
-	if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
-		return;
-	}
-	mmcdat->bytes_xfered += host->dma_len;
-	host->sg_idx++;
-	if (host->sg_idx < host->sg_len) {
-		mmc_omap_prepare_dma(host, host->data);
-		omap_start_dma(host->dma_ch);
-	} else
-		mmc_omap_dma_done(host, host->data);
-}
-
-static int mmc_omap_get_dma_channel(struct mmc_omap_host *host, struct mmc_data *data)
-{
-	const char *dma_dev_name;
-	int sync_dev, dma_ch, is_read, r;
-
-	is_read = !(data->flags & MMC_DATA_WRITE);
-	del_timer_sync(&host->dma_timer);
-	if (host->dma_ch >= 0) {
-		if (is_read == host->dma_is_read)
-			return 0;
-		omap_free_dma(host->dma_ch);
-		host->dma_ch = -1;
-	}
-
-	if (is_read) {
-		if (host->id == 0) {
-			sync_dev = OMAP_DMA_MMC_RX;
-			dma_dev_name = "MMC1 read";
-		} else {
-			sync_dev = OMAP_DMA_MMC2_RX;
-			dma_dev_name = "MMC2 read";
-		}
-	} else {
-		if (host->id == 0) {
-			sync_dev = OMAP_DMA_MMC_TX;
-			dma_dev_name = "MMC1 write";
-		} else {
-			sync_dev = OMAP_DMA_MMC2_TX;
-			dma_dev_name = "MMC2 write";
-		}
-	}
-	r = omap_request_dma(sync_dev, dma_dev_name, mmc_omap_dma_cb,
-			     host, &dma_ch);
-	if (r != 0) {
-		dev_dbg(mmc_dev(host->mmc), "omap_request_dma() failed with %d\n", r);
-		return r;
-	}
-	host->dma_ch = dma_ch;
-	host->dma_is_read = is_read;
-
-	return 0;
+	mmc_omap_dma_done(host, data);
 }
 
 static inline void set_cmd_timeout(struct mmc_omap_host *host, struct mmc_request *req)
@@ -1118,33 +973,85 @@ mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
 
 	host->sg_idx = 0;
 	if (use_dma) {
-		if (mmc_omap_get_dma_channel(host, data) == 0) {
-			enum dma_data_direction dma_data_dir;
-
-			if (data->flags & MMC_DATA_WRITE)
-				dma_data_dir = DMA_TO_DEVICE;
-			else
-				dma_data_dir = DMA_FROM_DEVICE;
-
-			host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
-						sg_len, dma_data_dir);
-			host->total_bytes_left = 0;
-			mmc_omap_prepare_dma(host, req->data);
-			host->brs_received = 0;
-			host->dma_done = 0;
-			host->dma_in_use = 1;
-		} else
-			use_dma = 0;
+		enum dma_data_direction dma_data_dir;
+		struct dma_async_tx_descriptor *tx;
+		struct dma_chan *c;
+		u32 burst, *bp;
+		u16 buf;
+
+		/*
+		 * FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx
+		 * and 24xx. Use 16 or 32 word frames when the
+		 * blocksize is at least that large. Blocksize is
+		 * usually 512 bytes; but not for some SD reads.
+		 */
+		burst = cpu_is_omap15xx() ? 32 : 64;
+		if (burst > data->blksz)
+			burst = data->blksz;
+
+		burst >>= 1;
+
+		if (data->flags & MMC_DATA_WRITE) {
+			c = host->dma_tx;
+			bp = &host->dma_tx_burst;
+			buf = 0x0f80 | (burst - 1) << 0;
+			dma_data_dir = DMA_TO_DEVICE;
+		} else {
+			c = host->dma_rx;
+			bp = &host->dma_rx_burst;
+			buf = 0x800f | (burst - 1) << 8;
+			dma_data_dir = DMA_FROM_DEVICE;
+		}
+
+		if (!c)
+			goto use_pio;
+
+		/* Only reconfigure if we have a different burst size */
+		if (*bp != burst) {
+			struct dma_slave_config cfg;
+
+			cfg.src_addr = host->phys_base + OMAP_MMC_REG(host, DATA);
+			cfg.dst_addr = host->phys_base + OMAP_MMC_REG(host, DATA);
+			cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+			cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+			cfg.src_maxburst = burst;
+			cfg.dst_maxburst = burst;
+
+			if (dmaengine_slave_config(c, &cfg))
+				goto use_pio;
+
+			*bp = burst;
+		}
+
+		host->sg_len = dma_map_sg(c->device->dev, data->sg, sg_len,
+					  dma_data_dir);
+		if (host->sg_len == 0)
+			goto use_pio;
+
+		tx = dmaengine_prep_slave_sg(c, data->sg, host->sg_len,
+			data->flags & MMC_DATA_WRITE ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
+			DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+		if (!tx)
+			goto use_pio;
+
+		OMAP_MMC_WRITE(host, BUF, buf);
+
+		tx->callback = mmc_omap_dma_callback;
+		tx->callback_param = host;
+		dmaengine_submit(tx);
+		host->brs_received = 0;
+		host->dma_done = 0;
+		host->dma_in_use = 1;
+		return;
 	}
+ use_pio:
 
 	/* Revert to PIO? */
-	if (!use_dma) {
-		OMAP_MMC_WRITE(host, BUF, 0x1f1f);
-		host->total_bytes_left = data->blocks * block_size;
-		host->sg_len = sg_len;
-		mmc_omap_sg_to_buf(host);
-		host->dma_in_use = 0;
-	}
+	OMAP_MMC_WRITE(host, BUF, 0x1f1f);
+	host->total_bytes_left = data->blocks * block_size;
+	host->sg_len = sg_len;
+	mmc_omap_sg_to_buf(host);
+	host->dma_in_use = 0;
 }
 
 static void mmc_omap_start_request(struct mmc_omap_host *host,
@@ -1157,8 +1064,12 @@ static void mmc_omap_start_request(struct mmc_omap_host *host,
 	/* only touch fifo AFTER the controller readies it */
 	mmc_omap_prepare_data(host, req);
 	mmc_omap_start_command(host, req->cmd);
-	if (host->dma_in_use)
-		omap_start_dma(host->dma_ch);
+	if (host->dma_in_use) {
+		struct dma_chan *c = host->data->flags & MMC_DATA_WRITE ?
+				host->dma_tx : host->dma_rx;
+
+		dma_async_issue_pending(c);
+	}
 }
 
 static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
@@ -1400,6 +1311,8 @@ static int __devinit mmc_omap_probe(struct platform_device *pdev)
 	struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
 	struct mmc_omap_host *host = NULL;
 	struct resource *res;
+	dma_cap_mask_t mask;
+	unsigned sig;
 	int i, ret = 0;
 	int irq;
 
@@ -1439,7 +1352,6 @@ static int __devinit mmc_omap_probe(struct platform_device *pdev)
 	setup_timer(&host->clk_timer, mmc_omap_clk_timer, (unsigned long) host);
 
 	spin_lock_init(&host->dma_lock);
-	setup_timer(&host->dma_timer, mmc_omap_dma_timer, (unsigned long) host);
 	spin_lock_init(&host->slot_lock);
 	init_waitqueue_head(&host->slot_wq);
 
@@ -1450,11 +1362,7 @@ static int __devinit mmc_omap_probe(struct platform_device *pdev)
 	host->id = pdev->id;
 	host->mem_res = res;
 	host->irq = irq;
-
 	host->use_dma = 1;
-	host->dev->dma_mask = &pdata->dma_mask;
-	host->dma_ch = -1;
-
 	host->irq = irq;
 	host->phys_base = host->mem_res->start;
 	host->virt_base = ioremap(res->start, resource_size(res));
@@ -1474,9 +1382,48 @@ static int __devinit mmc_omap_probe(struct platform_device *pdev)
 		goto err_free_iclk;
 	}
 
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+
+	host->dma_tx_burst = -1;
+	host->dma_rx_burst = -1;
+
+	if (cpu_is_omap24xx())
+		sig = host->id == 0 ? OMAP24XX_DMA_MMC1_TX : OMAP24XX_DMA_MMC2_TX;
+	else
+		sig = host->id == 0 ? OMAP_DMA_MMC_TX : OMAP_DMA_MMC2_TX;
+	host->dma_tx = dma_request_channel(mask, omap_dma_filter_fn, &sig);
+#if 0
+	if (!host->dma_tx) {
+		dev_err(host->dev, "unable to obtain TX DMA engine channel %u\n",
+			sig);
+		goto err_dma;
+	}
+#else
+	if (!host->dma_tx)
+		dev_warn(host->dev, "unable to obtain TX DMA engine channel %u\n",
+			sig);
+#endif
+	if (cpu_is_omap24xx())
+		sig = host->id == 0 ? OMAP24XX_DMA_MMC1_RX : OMAP24XX_DMA_MMC2_RX;
+	else
+		sig = host->id == 0 ? OMAP_DMA_MMC_RX : OMAP_DMA_MMC2_RX;
+	host->dma_rx = dma_request_channel(mask, omap_dma_filter_fn, &sig);
+#if 0
+	if (!host->dma_rx) {
+		dev_err(host->dev, "unable to obtain RX DMA engine channel %u\n",
+			sig);
+		goto err_dma;
+	}
+#else
+	if (!host->dma_rx)
+		dev_warn(host->dev, "unable to obtain RX DMA engine channel %u\n",
+			sig);
+#endif
+
 	ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
 	if (ret)
-		goto err_free_fclk;
+		goto err_free_dma;
 
 	if (pdata->init != NULL) {
 		ret = pdata->init(&pdev->dev);
@@ -1510,7 +1457,11 @@ err_plat_cleanup:
 		pdata->cleanup(&pdev->dev);
 err_free_irq:
 	free_irq(host->irq, host);
-err_free_fclk:
+err_free_dma:
+	if (host->dma_tx)
+		dma_release_channel(host->dma_tx);
+	if (host->dma_rx)
+		dma_release_channel(host->dma_rx);
 	clk_put(host->fclk);
 err_free_iclk:
 	clk_disable(host->iclk);
@@ -1545,6 +1496,11 @@ static int __devexit mmc_omap_remove(struct platform_device *pdev)
 	clk_disable(host->iclk);
 	clk_put(host->iclk);
 
+	if (host->dma_tx)
+		dma_release_channel(host->dma_tx);
+	if (host->dma_rx)
+		dma_release_channel(host->dma_rx);
+
 	iounmap(host->virt_base);
 	release_mem_region(pdev->resource[0].start,
 			   pdev->resource[0].end - pdev->resource[0].start + 1);
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index bc28627af66b..3a09f93cc3b6 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -19,6 +19,7 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/debugfs.h>
+#include <linux/dmaengine.h>
 #include <linux/seq_file.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
@@ -29,6 +30,7 @@
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #include <linux/of_device.h>
+#include <linux/omap-dma.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/core.h>
 #include <linux/mmc/mmc.h>
@@ -37,7 +39,6 @@
 #include <linux/gpio.h>
 #include <linux/regulator/consumer.h>
 #include <linux/pm_runtime.h>
-#include <plat/dma.h>
 #include <mach/hardware.h>
 #include <plat/board.h>
 #include <plat/mmc.h>
@@ -166,7 +167,8 @@ struct omap_hsmmc_host {
 	int			suspended;
 	int			irq;
 	int			use_dma, dma_ch;
-	int			dma_line_tx, dma_line_rx;
+	struct dma_chan		*tx_chan;
+	struct dma_chan		*rx_chan;
 	int			slot_id;
 	int			response_busy;
 	int			context_loss;
@@ -797,6 +799,12 @@ omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data)
 		return DMA_FROM_DEVICE;
 }
 
+static struct dma_chan *omap_hsmmc_get_dma_chan(struct omap_hsmmc_host *host,
+	struct mmc_data *data)
+{
+	return data->flags & MMC_DATA_WRITE ? host->tx_chan : host->rx_chan;
+}
+
 static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq)
 {
 	int dma_ch;
@@ -889,10 +897,13 @@ static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno)
 	spin_unlock_irqrestore(&host->irq_lock, flags);
 
 	if (host->use_dma && dma_ch != -1) {
-		dma_unmap_sg(mmc_dev(host->mmc), host->data->sg,
-			host->data->sg_len,
+		struct dma_chan *chan = omap_hsmmc_get_dma_chan(host, host->data);
+
+		dmaengine_terminate_all(chan);
+		dma_unmap_sg(chan->device->dev,
+			host->data->sg, host->data->sg_len,
 			omap_hsmmc_get_dma_dir(host, host->data));
-		omap_free_dma(dma_ch);
+
 		host->data->host_cookie = 0;
 	}
 	host->data = NULL;
@@ -1190,90 +1201,29 @@ static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static int omap_hsmmc_get_dma_sync_dev(struct omap_hsmmc_host *host,
-				     struct mmc_data *data)
-{
-	int sync_dev;
-
-	if (data->flags & MMC_DATA_WRITE)
-		sync_dev = host->dma_line_tx;
-	else
-		sync_dev = host->dma_line_rx;
-	return sync_dev;
-}
-
-static void omap_hsmmc_config_dma_params(struct omap_hsmmc_host *host,
-				       struct mmc_data *data,
-				       struct scatterlist *sgl)
-{
-	int blksz, nblk, dma_ch;
-
-	dma_ch = host->dma_ch;
-	if (data->flags & MMC_DATA_WRITE) {
-		omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT,
-			(host->mapbase + OMAP_HSMMC_DATA), 0, 0);
-		omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
-			sg_dma_address(sgl), 0, 0);
-	} else {
-		omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT,
-			(host->mapbase + OMAP_HSMMC_DATA), 0, 0);
-		omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
-			sg_dma_address(sgl), 0, 0);
-	}
-
-	blksz = host->data->blksz;
-	nblk = sg_dma_len(sgl) / blksz;
-
-	omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32,
-			blksz / 4, nblk, OMAP_DMA_SYNC_FRAME,
-			omap_hsmmc_get_dma_sync_dev(host, data),
-			!(data->flags & MMC_DATA_WRITE));
-
-	omap_start_dma(dma_ch);
-}
-
-/*
- * DMA call back function
- */
-static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data)
+static void omap_hsmmc_dma_callback(void *param)
 {
-	struct omap_hsmmc_host *host = cb_data;
+	struct omap_hsmmc_host *host = param;
+	struct dma_chan *chan;
 	struct mmc_data *data;
-	int dma_ch, req_in_progress;
-	unsigned long flags;
-
-	if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
-		dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n",
-			ch_status);
-		return;
-	}
+	int req_in_progress;
 
-	spin_lock_irqsave(&host->irq_lock, flags);
+	spin_lock_irq(&host->irq_lock);
 	if (host->dma_ch < 0) {
-		spin_unlock_irqrestore(&host->irq_lock, flags);
+		spin_unlock_irq(&host->irq_lock);
 		return;
 	}
 
 	data = host->mrq->data;
-	host->dma_sg_idx++;
-	if (host->dma_sg_idx < host->dma_len) {
-		/* Fire up the next transfer. */
-		omap_hsmmc_config_dma_params(host, data,
-					   data->sg + host->dma_sg_idx);
-		spin_unlock_irqrestore(&host->irq_lock, flags);
-		return;
-	}
-
+	chan = omap_hsmmc_get_dma_chan(host, data);
 	if (!data->host_cookie)
-		dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
+		dma_unmap_sg(chan->device->dev,
+			     data->sg, data->sg_len,
 			     omap_hsmmc_get_dma_dir(host, data));
 
 	req_in_progress = host->req_in_progress;
-	dma_ch = host->dma_ch;
 	host->dma_ch = -1;
-	spin_unlock_irqrestore(&host->irq_lock, flags);
-
-	omap_free_dma(dma_ch);
+	spin_unlock_irq(&host->irq_lock);
 
 	/* If DMA has finished after TC, complete the request */
 	if (!req_in_progress) {
@@ -1286,7 +1236,8 @@ static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data)
 
 static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host,
 				       struct mmc_data *data,
-				       struct omap_hsmmc_next *next)
+				       struct omap_hsmmc_next *next,
+				       struct dma_chan *chan)
 {
 	int dma_len;
 
@@ -1301,8 +1252,7 @@ static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host,
 	/* Check if next job is already prepared */
 	if (next ||
 	    (!next && data->host_cookie != host->next_data.cookie)) {
-		dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
-				     data->sg_len,
+		dma_len = dma_map_sg(chan->device->dev, data->sg, data->sg_len,
 				     omap_hsmmc_get_dma_dir(host, data));
 
 	} else {
@@ -1329,8 +1279,11 @@ static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host,
 static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host,
 					struct mmc_request *req)
 {
-	int dma_ch = 0, ret = 0, i;
+	struct dma_slave_config cfg;
+	struct dma_async_tx_descriptor *tx;
+	int ret = 0, i;
 	struct mmc_data *data = req->data;
+	struct dma_chan *chan;
 
 	/* Sanity check: all the SG entries must be aligned by block size. */
 	for (i = 0; i < data->sg_len; i++) {
@@ -1348,22 +1301,41 @@ static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host,
 
 	BUG_ON(host->dma_ch != -1);
 
-	ret = omap_request_dma(omap_hsmmc_get_dma_sync_dev(host, data),
-			       "MMC/SD", omap_hsmmc_dma_cb, host, &dma_ch);
-	if (ret != 0) {
-		dev_err(mmc_dev(host->mmc),
-			"%s: omap_request_dma() failed with %d\n",
-			mmc_hostname(host->mmc), ret);
+	chan = omap_hsmmc_get_dma_chan(host, data);
+
+	cfg.src_addr = host->mapbase + OMAP_HSMMC_DATA;
+	cfg.dst_addr = host->mapbase + OMAP_HSMMC_DATA;
+	cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	cfg.src_maxburst = data->blksz / 4;
+	cfg.dst_maxburst = data->blksz / 4;
+
+	ret = dmaengine_slave_config(chan, &cfg);
+	if (ret)
 		return ret;
-	}
-	ret = omap_hsmmc_pre_dma_transfer(host, data, NULL);
+
+	ret = omap_hsmmc_pre_dma_transfer(host, data, NULL, chan);
 	if (ret)
 		return ret;
 
-	host->dma_ch = dma_ch;
-	host->dma_sg_idx = 0;
+	tx = dmaengine_prep_slave_sg(chan, data->sg, data->sg_len,
+		data->flags & MMC_DATA_WRITE ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
+		DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+	if (!tx) {
+		dev_err(mmc_dev(host->mmc), "prep_slave_sg() failed\n");
+		/* FIXME: cleanup */
+		return -1;
+	}
+
+	tx->callback = omap_hsmmc_dma_callback;
+	tx->callback_param = host;
 
-	omap_hsmmc_config_dma_params(host, data, data->sg);
+	/* Does not fail */
+	dmaengine_submit(tx);
+
+	host->dma_ch = 1;
+
+	dma_async_issue_pending(chan);
 
 	return 0;
 }
@@ -1445,11 +1417,11 @@ static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
 	struct omap_hsmmc_host *host = mmc_priv(mmc);
 	struct mmc_data *data = mrq->data;
 
-	if (host->use_dma) {
-		if (data->host_cookie)
-			dma_unmap_sg(mmc_dev(host->mmc), data->sg,
-				     data->sg_len,
-				     omap_hsmmc_get_dma_dir(host, data));
+	if (host->use_dma && data->host_cookie) {
+		struct dma_chan *c = omap_hsmmc_get_dma_chan(host, data);
+
+		dma_unmap_sg(c->device->dev, data->sg, data->sg_len,
+			     omap_hsmmc_get_dma_dir(host, data));
 		data->host_cookie = 0;
 	}
 }
@@ -1464,10 +1436,13 @@ static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
 		return ;
 	}
 
-	if (host->use_dma)
+	if (host->use_dma) {
+		struct dma_chan *c = omap_hsmmc_get_dma_chan(host, mrq->data);
+
 		if (omap_hsmmc_pre_dma_transfer(host, mrq->data,
-						&host->next_data))
+						&host->next_data, c))
 			mrq->data->host_cookie = 0;
+	}
 }
 
 /*
@@ -1800,6 +1775,8 @@ static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
 	struct resource *res;
 	int ret, irq;
 	const struct of_device_id *match;
+	dma_cap_mask_t mask;
+	unsigned tx_req, rx_req;
 
 	match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev);
 	if (match) {
@@ -1844,7 +1821,6 @@ static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
 	host->pdata	= pdata;
 	host->dev	= &pdev->dev;
 	host->use_dma	= 1;
-	host->dev->dma_mask = &pdata->dma_mask;
 	host->dma_ch	= -1;
 	host->irq	= irq;
 	host->slot_id	= 0;
@@ -1934,7 +1910,7 @@ static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
 		ret = -ENXIO;
 		goto err_irq;
 	}
-	host->dma_line_tx = res->start;
+	tx_req = res->start;
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
 	if (!res) {
@@ -1942,7 +1918,24 @@ static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
 		ret = -ENXIO;
 		goto err_irq;
 	}
-	host->dma_line_rx = res->start;
+	rx_req = res->start;
+
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+
+	host->rx_chan = dma_request_channel(mask, omap_dma_filter_fn, &rx_req);
+	if (!host->rx_chan) {
+		dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
+		ret = -ENXIO;
+		goto err_irq;
+	}
+
+	host->tx_chan = dma_request_channel(mask, omap_dma_filter_fn, &tx_req);
+	if (!host->tx_chan) {
+		dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req);
+		ret = -ENXIO;
+		goto err_irq;
+	}
 
 	/* Request IRQ for MMC operations */
 	ret = request_irq(host->irq, omap_hsmmc_irq, 0,
@@ -2021,6 +2014,10 @@ err_reg:
 err_irq_cd_init:
 	free_irq(host->irq, host);
 err_irq:
+	if (host->tx_chan)
+		dma_release_channel(host->tx_chan);
+	if (host->rx_chan)
+		dma_release_channel(host->rx_chan);
 	pm_runtime_put_sync(host->dev);
 	pm_runtime_disable(host->dev);
 	clk_put(host->fclk);
@@ -2056,6 +2053,11 @@ static int __devexit omap_hsmmc_remove(struct platform_device *pdev)
 	if (mmc_slot(host).card_detect_irq)
 		free_irq(mmc_slot(host).card_detect_irq, host);
 
+	if (host->tx_chan)
+		dma_release_channel(host->tx_chan);
+	if (host->rx_chan)
+		dma_release_channel(host->rx_chan);
+
 	pm_runtime_put_sync(host->dev);
 	pm_runtime_disable(host->dev);
 	clk_put(host->fclk);