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dmaengine: shdma: add .needs_tend_set / .no_dmars flags 

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Kuninori Morimoto 2011-06-17 08:21:05 +00:00 committed by Paul Mundt
parent e76c3af873
commit 260bf2c5f6
2 changed files with 10 additions and 0 deletions
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6
drivers/dma/shdma.c
View File

@ -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;

4
include/linux/sh_dma.h
View File

@ -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