From dd5e1339e528197abdb7827663ff0673797fa088 Mon Sep 17 00:00:00 2001
From: Alex Raimondi <mailinglist@miromico.ch>
Date: Tue, 9 Dec 2008 16:17:13 +0100
Subject: avr32: Hammerhead board support

The Hammerhead platform is built around a AVR32 32-bit microcontroller
from Atmel.  It offers versatile peripherals, such as ethernet, usb
device, usb host etc.

The board also incooperates a power supply and is a Power over Ethernet
(PoE) Powered Device (PD).

Additonally, a Cyclone III FPGA from Altera is integrated on the board.
The FPGA is mapped into the 32-bit AVR memory bus. The FPGA offers two
DDR2 SDRAM interfaces, which will cover even the most exceptional need
of memory bandwidth. Together with the onboard video decoder the board
is ready for video processing.

This patch does include the basic support for the fpga device driver,
but not the device driver itself.

Signed-off-by: Alex Raimondi <mailinglist@miromico.ch>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
---
 arch/avr32/mach-at32ap/at32ap700x.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'arch/avr32/mach-at32ap/at32ap700x.c')

diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 066252eebf6..b3293bf77e9 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -421,7 +421,7 @@ static unsigned long hsb_clk_get_rate(struct clk *clk)
 	return bus_clk_get_rate(clk, shift);
 }
 
-static void pba_clk_mode(struct clk *clk, int enabled)
+void pba_clk_mode(struct clk *clk, int enabled)
 {
 	unsigned long flags;
 	u32 mask;
@@ -436,7 +436,7 @@ static void pba_clk_mode(struct clk *clk, int enabled)
 	spin_unlock_irqrestore(&pm_lock, flags);
 }
 
-static unsigned long pba_clk_get_rate(struct clk *clk)
+unsigned long pba_clk_get_rate(struct clk *clk)
 {
 	unsigned long cksel, shift = 0;
 
-- 
cgit v1.2.3-70-g09d2


From c42aa775cc8a8ca558db0cc75979fb8e16667447 Mon Sep 17 00:00:00 2001
From: Nicolas Ferre <nicolas.ferre@atmel.com>
Date: Thu, 20 Nov 2008 15:59:12 +0100
Subject: atmel-mci: move atmel-mci.h file to include/linux

Needed to use the atmel-mci driver in an architecture
independant maner.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
---
 arch/avr32/boards/atngw100/setup.c      |  2 +-
 arch/avr32/boards/atstk1000/atstk1002.c |  2 +-
 arch/avr32/boards/atstk1000/atstk1003.c |  2 +-
 arch/avr32/boards/atstk1000/atstk1004.c |  2 +-
 arch/avr32/boards/mimc200/setup.c       |  2 +-
 arch/avr32/include/asm/atmel-mci.h      | 39 ---------------------------------
 arch/avr32/mach-at32ap/at32ap700x.c     |  2 +-
 drivers/mmc/host/atmel-mci.c            |  2 +-
 include/linux/atmel-mci.h               | 39 +++++++++++++++++++++++++++++++++
 9 files changed, 46 insertions(+), 46 deletions(-)
 delete mode 100644 arch/avr32/include/asm/atmel-mci.h
 create mode 100644 include/linux/atmel-mci.h

(limited to 'arch/avr32/mach-at32ap/at32ap700x.c')

diff --git a/arch/avr32/boards/atngw100/setup.c b/arch/avr32/boards/atngw100/setup.c
index 32fb9ba0fbd..05d3722fff1 100644
--- a/arch/avr32/boards/atngw100/setup.c
+++ b/arch/avr32/boards/atngw100/setup.c
@@ -19,8 +19,8 @@
 #include <linux/types.h>
 #include <linux/leds.h>
 #include <linux/spi/spi.h>
+#include <linux/atmel-mci.h>
 
-#include <asm/atmel-mci.h>
 #include <asm/io.h>
 #include <asm/setup.h>
 
diff --git a/arch/avr32/boards/atstk1000/atstk1002.c b/arch/avr32/boards/atstk1000/atstk1002.c
index 5c5cdf3b464..6d94f74bc5c 100644
--- a/arch/avr32/boards/atstk1000/atstk1002.c
+++ b/arch/avr32/boards/atstk1000/atstk1002.c
@@ -16,12 +16,12 @@
 #include <linux/types.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/at73c213.h>
+#include <linux/atmel-mci.h>
 
 #include <video/atmel_lcdc.h>
 
 #include <asm/io.h>
 #include <asm/setup.h>
-#include <asm/atmel-mci.h>
 
 #include <mach/at32ap700x.h>
 #include <mach/board.h>
diff --git a/arch/avr32/boards/atstk1000/atstk1003.c b/arch/avr32/boards/atstk1000/atstk1003.c
index 134b566630b..db2038cd2e5 100644
--- a/arch/avr32/boards/atstk1000/atstk1003.c
+++ b/arch/avr32/boards/atstk1000/atstk1003.c
@@ -17,9 +17,9 @@
 
 #include <linux/spi/at73c213.h>
 #include <linux/spi/spi.h>
+#include <linux/atmel-mci.h>
 
 #include <asm/setup.h>
-#include <asm/atmel-mci.h>
 
 #include <mach/at32ap700x.h>
 #include <mach/board.h>
diff --git a/arch/avr32/boards/atstk1000/atstk1004.c b/arch/avr32/boards/atstk1000/atstk1004.c
index cb32eb844aa..29b35aca96c 100644
--- a/arch/avr32/boards/atstk1000/atstk1004.c
+++ b/arch/avr32/boards/atstk1000/atstk1004.c
@@ -17,11 +17,11 @@
 
 #include <linux/spi/at73c213.h>
 #include <linux/spi/spi.h>
+#include <linux/atmel-mci.h>
 
 #include <video/atmel_lcdc.h>
 
 #include <asm/setup.h>
-#include <asm/atmel-mci.h>
 
 #include <mach/at32ap700x.h>
 #include <mach/board.h>
diff --git a/arch/avr32/boards/mimc200/setup.c b/arch/avr32/boards/mimc200/setup.c
index 397cbb8f44c..811d73027f7 100644
--- a/arch/avr32/boards/mimc200/setup.c
+++ b/arch/avr32/boards/mimc200/setup.c
@@ -24,7 +24,7 @@ extern struct atmel_lcdfb_info mimc200_lcdc_data;
 #include <video/atmel_lcdc.h>
 #include <linux/fb.h>
 
-#include <asm/atmel-mci.h>
+#include <linux/atmel-mci.h>
 #include <linux/io.h>
 #include <asm/setup.h>
 
diff --git a/arch/avr32/include/asm/atmel-mci.h b/arch/avr32/include/asm/atmel-mci.h
deleted file mode 100644
index 59f3fadd0b6..00000000000
--- a/arch/avr32/include/asm/atmel-mci.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#ifndef __ASM_AVR32_ATMEL_MCI_H
-#define __ASM_AVR32_ATMEL_MCI_H
-
-#define ATMEL_MCI_MAX_NR_SLOTS	2
-
-struct dma_slave;
-
-/**
- * struct mci_slot_pdata - board-specific per-slot configuration
- * @bus_width: Number of data lines wired up the slot
- * @detect_pin: GPIO pin wired to the card detect switch
- * @wp_pin: GPIO pin wired to the write protect sensor
- *
- * If a given slot is not present on the board, @bus_width should be
- * set to 0. The other fields are ignored in this case.
- *
- * Any pins that aren't available should be set to a negative value.
- *
- * Note that support for multiple slots is experimental -- some cards
- * might get upset if we don't get the clock management exactly right.
- * But in most cases, it should work just fine.
- */
-struct mci_slot_pdata {
-	unsigned int		bus_width;
-	int			detect_pin;
-	int			wp_pin;
-};
-
-/**
- * struct mci_platform_data - board-specific MMC/SDcard configuration
- * @dma_slave: DMA slave interface to use in data transfers, or NULL.
- * @slot: Per-slot configuration data.
- */
-struct mci_platform_data {
-	struct dma_slave	*dma_slave;
-	struct mci_slot_pdata	slot[ATMEL_MCI_MAX_NR_SLOTS];
-};
-
-#endif /* __ASM_AVR32_ATMEL_MCI_H */
diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 066252eebf6..3cf49553e4f 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -15,8 +15,8 @@
 #include <linux/gpio.h>
 #include <linux/spi/spi.h>
 #include <linux/usb/atmel_usba_udc.h>
+#include <linux/atmel-mci.h>
 
-#include <asm/atmel-mci.h>
 #include <asm/io.h>
 #include <asm/irq.h>
 
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 7a3f2436b01..1e97916914a 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -25,8 +25,8 @@
 #include <linux/stat.h>
 
 #include <linux/mmc/host.h>
+#include <linux/atmel-mci.h>
 
-#include <asm/atmel-mci.h>
 #include <asm/io.h>
 #include <asm/unaligned.h>
 
diff --git a/include/linux/atmel-mci.h b/include/linux/atmel-mci.h
new file mode 100644
index 00000000000..2a2213eefd8
--- /dev/null
+++ b/include/linux/atmel-mci.h
@@ -0,0 +1,39 @@
+#ifndef __LINUX_ATMEL_MCI_H
+#define __LINUX_ATMEL_MCI_H
+
+#define ATMEL_MCI_MAX_NR_SLOTS	2
+
+struct dma_slave;
+
+/**
+ * struct mci_slot_pdata - board-specific per-slot configuration
+ * @bus_width: Number of data lines wired up the slot
+ * @detect_pin: GPIO pin wired to the card detect switch
+ * @wp_pin: GPIO pin wired to the write protect sensor
+ *
+ * If a given slot is not present on the board, @bus_width should be
+ * set to 0. The other fields are ignored in this case.
+ *
+ * Any pins that aren't available should be set to a negative value.
+ *
+ * Note that support for multiple slots is experimental -- some cards
+ * might get upset if we don't get the clock management exactly right.
+ * But in most cases, it should work just fine.
+ */
+struct mci_slot_pdata {
+	unsigned int		bus_width;
+	int			detect_pin;
+	int			wp_pin;
+};
+
+/**
+ * struct mci_platform_data - board-specific MMC/SDcard configuration
+ * @dma_slave: DMA slave interface to use in data transfers, or NULL.
+ * @slot: Per-slot configuration data.
+ */
+struct mci_platform_data {
+	struct dma_slave	*dma_slave;
+	struct mci_slot_pdata	slot[ATMEL_MCI_MAX_NR_SLOTS];
+};
+
+#endif /* __LINUX_ATMEL_MCI_H */
-- 
cgit v1.2.3-70-g09d2


From 74465b4ff9ac1da503025c0a0042e023bfa6505c Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Tue, 6 Jan 2009 11:38:16 -0700
Subject: atmel-mci: convert to dma_request_channel and down-level dma_slave

dma_request_channel provides an exclusive channel, so we no longer need to
pass slave data through dmaengine.

Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 arch/avr32/include/asm/atmel-mci.h  |  6 +--
 arch/avr32/mach-at32ap/at32ap700x.c | 15 ++----
 drivers/dma/dmaengine.c             |  8 ---
 drivers/dma/dw_dmac.c               | 25 +++-------
 drivers/mmc/host/atmel-mci.c        | 98 ++++++++++---------------------------
 include/linux/dmaengine.h           | 38 --------------
 include/linux/dw_dmac.h             | 31 +++++++++---
 7 files changed, 62 insertions(+), 159 deletions(-)

(limited to 'arch/avr32/mach-at32ap/at32ap700x.c')

diff --git a/arch/avr32/include/asm/atmel-mci.h b/arch/avr32/include/asm/atmel-mci.h
index 59f3fadd0b6..e5e54c6f35d 100644
--- a/arch/avr32/include/asm/atmel-mci.h
+++ b/arch/avr32/include/asm/atmel-mci.h
@@ -3,7 +3,7 @@
 
 #define ATMEL_MCI_MAX_NR_SLOTS	2
 
-struct dma_slave;
+#include <linux/dw_dmac.h>
 
 /**
  * struct mci_slot_pdata - board-specific per-slot configuration
@@ -28,11 +28,11 @@ struct mci_slot_pdata {
 
 /**
  * struct mci_platform_data - board-specific MMC/SDcard configuration
- * @dma_slave: DMA slave interface to use in data transfers, or NULL.
+ * @dma_slave: DMA slave interface to use in data transfers.
  * @slot: Per-slot configuration data.
  */
 struct mci_platform_data {
-	struct dma_slave	*dma_slave;
+	struct dw_dma_slave	dma_slave;
 	struct mci_slot_pdata	slot[ATMEL_MCI_MAX_NR_SLOTS];
 };
 
diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 066252eebf6..414f174e38c 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -1305,7 +1305,7 @@ struct platform_device *__init
 at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
 {
 	struct platform_device		*pdev;
-	struct dw_dma_slave		*dws;
+	struct dw_dma_slave		*dws = &data->dma_slave;
 	u32				pioa_mask;
 	u32				piob_mask;
 
@@ -1324,22 +1324,13 @@ at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
 				ARRAY_SIZE(atmel_mci0_resource)))
 		goto fail;
 
-	if (data->dma_slave)
-		dws = kmemdup(to_dw_dma_slave(data->dma_slave),
-				sizeof(struct dw_dma_slave), GFP_KERNEL);
-	else
-		dws = kzalloc(sizeof(struct dw_dma_slave), GFP_KERNEL);
-
-	dws->slave.dev = &pdev->dev;
-	dws->slave.dma_dev = &dw_dmac0_device.dev;
-	dws->slave.reg_width = DMA_SLAVE_WIDTH_32BIT;
+	dws->dma_dev = &dw_dmac0_device.dev;
+	dws->reg_width = DW_DMA_SLAVE_WIDTH_32BIT;
 	dws->cfg_hi = (DWC_CFGH_SRC_PER(0)
 				| DWC_CFGH_DST_PER(1));
 	dws->cfg_lo &= ~(DWC_CFGL_HS_DST_POL
 				| DWC_CFGL_HS_SRC_POL);
 
-	data->dma_slave = &dws->slave;
-
 	if (platform_device_add_data(pdev, data,
 				sizeof(struct mci_platform_data)))
 		goto fail;
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 7a0594f24a3..90aca505a1d 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -234,10 +234,6 @@ static void dma_client_chan_alloc(struct dma_client *client)
 	list_for_each_entry(device, &dma_device_list, global_node) {
 		if (dma_has_cap(DMA_PRIVATE, device->cap_mask))
 			continue;
-		/* Does the client require a specific DMA controller? */
-		if (client->slave && client->slave->dma_dev
-				&& client->slave->dma_dev != device->dev)
-			continue;
 		if (!dma_device_satisfies_mask(device, client->cap_mask))
 			continue;
 
@@ -613,10 +609,6 @@ void dma_async_client_register(struct dma_client *client)
 	struct dma_chan *chan;
 	int err;
 
-	/* validate client data */
-	BUG_ON(dma_has_cap(DMA_SLAVE, client->cap_mask) &&
-		!client->slave);
-
 	mutex_lock(&dma_list_mutex);
 	dmaengine_ref_count++;
 
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 377dafa37a2..dbd50804e5d 100644
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -567,7 +567,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
 	if (unlikely(!dws || !sg_len))
 		return NULL;
 
-	reg_width = dws->slave.reg_width;
+	reg_width = dws->reg_width;
 	prev = first = NULL;
 
 	sg_len = dma_map_sg(chan->dev.parent, sgl, sg_len, direction);
@@ -579,7 +579,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
 				| DWC_CTLL_DST_FIX
 				| DWC_CTLL_SRC_INC
 				| DWC_CTLL_FC_M2P);
-		reg = dws->slave.tx_reg;
+		reg = dws->tx_reg;
 		for_each_sg(sgl, sg, sg_len, i) {
 			struct dw_desc	*desc;
 			u32		len;
@@ -625,7 +625,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
 				| DWC_CTLL_SRC_FIX
 				| DWC_CTLL_FC_P2M);
 
-		reg = dws->slave.rx_reg;
+		reg = dws->rx_reg;
 		for_each_sg(sgl, sg, sg_len, i) {
 			struct dw_desc	*desc;
 			u32		len;
@@ -764,7 +764,6 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan,
 	struct dw_dma_chan	*dwc = to_dw_dma_chan(chan);
 	struct dw_dma		*dw = to_dw_dma(chan->device);
 	struct dw_desc		*desc;
-	struct dma_slave	*slave;
 	struct dw_dma_slave	*dws;
 	int			i;
 	u32			cfghi;
@@ -772,12 +771,6 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan,
 
 	dev_vdbg(&chan->dev, "alloc_chan_resources\n");
 
-	/* Channels doing slave DMA can only handle one client. */
-	if (dwc->dws || (client && client->slave)) {
-		if (chan->client_count)
-			return -EBUSY;
-	}
-
 	/* ASSERT:  channel is idle */
 	if (dma_readl(dw, CH_EN) & dwc->mask) {
 		dev_dbg(&chan->dev, "DMA channel not idle?\n");
@@ -789,23 +782,17 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan,
 	cfghi = DWC_CFGH_FIFO_MODE;
 	cfglo = 0;
 
-	slave = client->slave;
-	if (slave) {
+	dws = dwc->dws;
+	if (dws) {
 		/*
 		 * We need controller-specific data to set up slave
 		 * transfers.
 		 */
-		BUG_ON(!slave->dma_dev || slave->dma_dev != dw->dma.dev);
-
-		dws = container_of(slave, struct dw_dma_slave, slave);
+		BUG_ON(!dws->dma_dev || dws->dma_dev != dw->dma.dev);
 
-		dwc->dws = dws;
 		cfghi = dws->cfg_hi;
 		cfglo = dws->cfg_lo;
-	} else {
-		dwc->dws = NULL;
 	}
-
 	channel_writel(dwc, CFG_LO, cfglo);
 	channel_writel(dwc, CFG_HI, cfghi);
 
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 6c11f4d4c4e..7a34118507d 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -1441,60 +1441,6 @@ static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-#ifdef CONFIG_MMC_ATMELMCI_DMA
-
-static inline struct atmel_mci *
-dma_client_to_atmel_mci(struct dma_client *client)
-{
-	return container_of(client, struct atmel_mci, dma.client);
-}
-
-static enum dma_state_client atmci_dma_event(struct dma_client *client,
-		struct dma_chan *chan, enum dma_state state)
-{
-	struct atmel_mci	*host;
-	enum dma_state_client	ret = DMA_NAK;
-
-	host = dma_client_to_atmel_mci(client);
-
-	switch (state) {
-	case DMA_RESOURCE_AVAILABLE:
-		spin_lock_bh(&host->lock);
-		if (!host->dma.chan) {
-			host->dma.chan = chan;
-			ret = DMA_ACK;
-		}
-		spin_unlock_bh(&host->lock);
-
-		if (ret == DMA_ACK)
-			dev_info(&host->pdev->dev,
-					"Using %s for DMA transfers\n",
-					chan->dev.bus_id);
-		break;
-
-	case DMA_RESOURCE_REMOVED:
-		spin_lock_bh(&host->lock);
-		if (host->dma.chan == chan) {
-			host->dma.chan = NULL;
-			ret = DMA_ACK;
-		}
-		spin_unlock_bh(&host->lock);
-
-		if (ret == DMA_ACK)
-			dev_info(&host->pdev->dev,
-					"Lost %s, falling back to PIO\n",
-					chan->dev.bus_id);
-		break;
-
-	default:
-		break;
-	}
-
-
-	return ret;
-}
-#endif /* CONFIG_MMC_ATMELMCI_DMA */
-
 static int __init atmci_init_slot(struct atmel_mci *host,
 		struct mci_slot_pdata *slot_data, unsigned int id,
 		u32 sdc_reg)
@@ -1598,6 +1544,18 @@ static void __exit atmci_cleanup_slot(struct atmel_mci_slot *slot,
 	mmc_free_host(slot->mmc);
 }
 
+#ifdef CONFIG_MMC_ATMELMCI_DMA
+static enum dma_state_client filter(struct dma_chan *chan, void *slave)
+{
+	struct dw_dma_slave *dws = slave;
+
+	if (dws->dma_dev == chan->device->dev)
+		return DMA_ACK;
+	else
+		return DMA_DUP;
+}
+#endif
+
 static int __init atmci_probe(struct platform_device *pdev)
 {
 	struct mci_platform_data	*pdata;
@@ -1650,22 +1608,20 @@ static int __init atmci_probe(struct platform_device *pdev)
 		goto err_request_irq;
 
 #ifdef CONFIG_MMC_ATMELMCI_DMA
-	if (pdata->dma_slave) {
-		struct dma_slave *slave = pdata->dma_slave;
+	if (pdata->dma_slave.dma_dev) {
+		struct dw_dma_slave *dws = &pdata->dma_slave;
+		dma_cap_mask_t mask;
 
-		slave->tx_reg = regs->start + MCI_TDR;
-		slave->rx_reg = regs->start + MCI_RDR;
+		dws->tx_reg = regs->start + MCI_TDR;
+		dws->rx_reg = regs->start + MCI_RDR;
 
 		/* Try to grab a DMA channel */
-		host->dma.client.event_callback = atmci_dma_event;
-		dma_cap_set(DMA_SLAVE, host->dma.client.cap_mask);
-		host->dma.client.slave = slave;
-
-		dma_async_client_register(&host->dma.client);
-		dma_async_client_chan_request(&host->dma.client);
-	} else {
-		dev_notice(&pdev->dev, "DMA not available, using PIO\n");
+		dma_cap_zero(mask);
+		dma_cap_set(DMA_SLAVE, mask);
+		host->dma.chan = dma_request_channel(mask, filter, dws);
 	}
+	if (!host->dma.chan)
+		dev_notice(&pdev->dev, "DMA not available, using PIO\n");
 #endif /* CONFIG_MMC_ATMELMCI_DMA */
 
 	platform_set_drvdata(pdev, host);
@@ -1697,8 +1653,8 @@ static int __init atmci_probe(struct platform_device *pdev)
 
 err_init_slot:
 #ifdef CONFIG_MMC_ATMELMCI_DMA
-	if (pdata->dma_slave)
-		dma_async_client_unregister(&host->dma.client);
+	if (host->dma.chan)
+		dma_release_channel(host->dma.chan);
 #endif
 	free_irq(irq, host);
 err_request_irq:
@@ -1729,8 +1685,8 @@ static int __exit atmci_remove(struct platform_device *pdev)
 	clk_disable(host->mck);
 
 #ifdef CONFIG_MMC_ATMELMCI_DMA
-	if (host->dma.client.slave)
-		dma_async_client_unregister(&host->dma.client);
+	if (host->dma.chan)
+		dma_release_channel(host->dma.chan);
 #endif
 
 	free_irq(platform_get_irq(pdev, 0), host);
@@ -1759,7 +1715,7 @@ static void __exit atmci_exit(void)
 	platform_driver_unregister(&atmci_driver);
 }
 
-module_init(atmci_init);
+late_initcall(atmci_init); /* try to load after dma driver when built-in */
 module_exit(atmci_exit);
 
 MODULE_DESCRIPTION("Atmel Multimedia Card Interface driver");
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 6f2d070ac7f..d63544cf8a1 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -96,17 +96,6 @@ enum dma_transaction_type {
 /* last transaction type for creation of the capabilities mask */
 #define DMA_TX_TYPE_END (DMA_SLAVE + 1)
 
-/**
- * enum dma_slave_width - DMA slave register access width.
- * @DMA_SLAVE_WIDTH_8BIT: Do 8-bit slave register accesses
- * @DMA_SLAVE_WIDTH_16BIT: Do 16-bit slave register accesses
- * @DMA_SLAVE_WIDTH_32BIT: Do 32-bit slave register accesses
- */
-enum dma_slave_width {
-	DMA_SLAVE_WIDTH_8BIT,
-	DMA_SLAVE_WIDTH_16BIT,
-	DMA_SLAVE_WIDTH_32BIT,
-};
 
 /**
  * enum dma_ctrl_flags - DMA flags to augment operation preparation,
@@ -132,32 +121,6 @@ enum dma_ctrl_flags {
  */
 typedef struct { DECLARE_BITMAP(bits, DMA_TX_TYPE_END); } dma_cap_mask_t;
 
-/**
- * struct dma_slave - Information about a DMA slave
- * @dev: device acting as DMA slave
- * @dma_dev: required DMA master device. If non-NULL, the client can not be
- *	bound to other masters than this.
- * @tx_reg: physical address of data register used for
- *	memory-to-peripheral transfers
- * @rx_reg: physical address of data register used for
- *	peripheral-to-memory transfers
- * @reg_width: peripheral register width
- *
- * If dma_dev is non-NULL, the client can not be bound to other DMA
- * masters than the one corresponding to this device. The DMA master
- * driver may use this to determine if there is controller-specific
- * data wrapped around this struct. Drivers of platform code that sets
- * the dma_dev field must therefore make sure to use an appropriate
- * controller-specific dma slave structure wrapping this struct.
- */
-struct dma_slave {
-	struct device		*dev;
-	struct device		*dma_dev;
-	dma_addr_t		tx_reg;
-	dma_addr_t		rx_reg;
-	enum dma_slave_width	reg_width;
-};
-
 /**
  * struct dma_chan_percpu - the per-CPU part of struct dma_chan
  * @refcount: local_t used for open-coded "bigref" counting
@@ -248,7 +211,6 @@ typedef enum dma_state_client (*dma_filter_fn)(struct dma_chan *chan, void *filt
 struct dma_client {
 	dma_event_callback	event_callback;
 	dma_cap_mask_t		cap_mask;
-	struct dma_slave	*slave;
 	struct list_head	global_node;
 };
 
diff --git a/include/linux/dw_dmac.h b/include/linux/dw_dmac.h
index 04d217b442b..d797dde247f 100644
--- a/include/linux/dw_dmac.h
+++ b/include/linux/dw_dmac.h
@@ -21,15 +21,35 @@ struct dw_dma_platform_data {
 	unsigned int	nr_channels;
 };
 
+/**
+ * enum dw_dma_slave_width - DMA slave register access width.
+ * @DMA_SLAVE_WIDTH_8BIT: Do 8-bit slave register accesses
+ * @DMA_SLAVE_WIDTH_16BIT: Do 16-bit slave register accesses
+ * @DMA_SLAVE_WIDTH_32BIT: Do 32-bit slave register accesses
+ */
+enum dw_dma_slave_width {
+	DW_DMA_SLAVE_WIDTH_8BIT,
+	DW_DMA_SLAVE_WIDTH_16BIT,
+	DW_DMA_SLAVE_WIDTH_32BIT,
+};
+
 /**
  * struct dw_dma_slave - Controller-specific information about a slave
- * @slave: Generic information about the slave
- * @ctl_lo: Platform-specific initializer for the CTL_LO register
+ *
+ * @dma_dev: required DMA master device
+ * @tx_reg: physical address of data register used for
+ *	memory-to-peripheral transfers
+ * @rx_reg: physical address of data register used for
+ *	peripheral-to-memory transfers
+ * @reg_width: peripheral register width
  * @cfg_hi: Platform-specific initializer for the CFG_HI register
  * @cfg_lo: Platform-specific initializer for the CFG_LO register
  */
 struct dw_dma_slave {
-	struct dma_slave	slave;
+	struct device		*dma_dev;
+	dma_addr_t		tx_reg;
+	dma_addr_t		rx_reg;
+	enum dw_dma_slave_width	reg_width;
 	u32			cfg_hi;
 	u32			cfg_lo;
 };
@@ -54,9 +74,4 @@ struct dw_dma_slave {
 #define DWC_CFGL_HS_DST_POL	(1 << 18)	/* dst handshake active low */
 #define DWC_CFGL_HS_SRC_POL	(1 << 19)	/* src handshake active low */
 
-static inline struct dw_dma_slave *to_dw_dma_slave(struct dma_slave *slave)
-{
-	return container_of(slave, struct dw_dma_slave, slave);
-}
-
 #endif /* DW_DMAC_H */
-- 
cgit v1.2.3-70-g09d2