diff mbox

[RFC,4/6,v3] dmaengine: shdma: add .needs_tend_set / .no_dmars flags

Message ID w3p39j8q366.wl%kuninori.morimoto.gx@renesas.com (mailing list archive)
State Accepted
Commit 260bf2c5f69f419b04b6861ca91565b5fb16ce48
Headers show

Commit Message

Kuninori Morimoto June 17, 2011, 8:21 a.m. UTC 
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
v2 -> v3

- u32 -> unsigned int for tend_set / no_dmars

 drivers/dma/shdma.c    |    6 ++++++
 include/linux/sh_dma.h |    4 ++++
 2 files changed, 10 insertions(+), 0 deletions(-)
diff mbox

Patch

diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 6a21cd8..0f3ec8d 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -194,6 +194,9 @@  static void dmae_start(struct sh_dmae_chan *sh_chan)
 	struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
 	u32 chcr = chcr_read(sh_chan);
 
+	if (shdev->pdata->needs_tend_set)
+		sh_dmae_writel(sh_chan, 0xFFFFFFFF, TEND);
+
 	chcr |= CHCR_DE | shdev->chcr_ie_bit;
 	chcr_write(sh_chan, chcr & ~CHCR_TE);
 }
@@ -242,6 +245,9 @@  static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
 	if (dmae_is_busy(sh_chan))
 		return -EBUSY;
 
+	if (pdata->no_dmars)
+		return 0;
+
 	/* in the case of a missing DMARS resource use first memory window */
 	if (!addr)
 		addr = (u16 __iomem *)shdev->chan_reg;
diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h
index f25afc6..cb2dd11 100644
--- a/include/linux/sh_dma.h
+++ b/include/linux/sh_dma.h
@@ -66,6 +66,8 @@  struct sh_dmae_pdata {
 	u32 chcr_ie_bit;
 
 	unsigned int dmaor_is_32bit:1;
+	unsigned int needs_tend_set:1;
+	unsigned int no_dmars:1;
 };
 
 /* DMA register */
@@ -75,6 +77,8 @@  struct sh_dmae_pdata {
 #define CHCR	0x0C
 #define DMAOR	0x40
 
+#define TEND	0x18 /* USB-DMAC */
+
 /* DMAOR definitions */
 #define DMAOR_AE	0x00000004
 #define DMAOR_NMIF	0x00000002