dmaengine: shdma: add .needs_tend_set / .no_dmars flags
Kuninori Morimoto [Fri, 17 Jun 2011 08:21:05 +0000 (08:21 +0000)]
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

drivers/dma/shdma.c
include/linux/sh_dma.h

index 6a21cd8..0f3ec8d 100644 (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;
index f25afc6..cb2dd11 100644 (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