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Merge branch 'common/dma' into sh-latest

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This commit is contained in:
Paul Mundt 2011-06-21 17:59:05 +09:00
commit f448e9c9da
3 changed files with 64 additions and 12 deletions
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66
drivers/dma/shdma.c
View File

@ -70,12 +70,36 @@ static u32 sh_dmae_readl(struct sh_dmae_chan *sh_dc, u32 reg)
static u16 dmaor_read(struct sh_dmae_device *shdev)
{
return __raw_readw(shdev->chan_reg + DMAOR / sizeof(u32));
u32 __iomem *addr = shdev->chan_reg + DMAOR / sizeof(u32);
if (shdev->pdata->dmaor_is_32bit)
return __raw_readl(addr);
else
return __raw_readw(addr);
}
static void dmaor_write(struct sh_dmae_device *shdev, u16 data)
{
__raw_writew(data, shdev->chan_reg + DMAOR / sizeof(u32));
u32 __iomem *addr = shdev->chan_reg + DMAOR / sizeof(u32);
if (shdev->pdata->dmaor_is_32bit)
__raw_writel(data, addr);
else
__raw_writew(data, addr);
}
static void chcr_write(struct sh_dmae_chan *sh_dc, u32 data)
{
struct sh_dmae_device *shdev = to_sh_dev(sh_dc);
__raw_writel(data, sh_dc->base + shdev->chcr_offset / sizeof(u32));
}
static u32 chcr_read(struct sh_dmae_chan *sh_dc)
{
struct sh_dmae_device *shdev = to_sh_dev(sh_dc);
return __raw_readl(sh_dc->base + shdev->chcr_offset / sizeof(u32));
}
/*
@ -120,7 +144,7 @@ static int sh_dmae_rst(struct sh_dmae_device *shdev)
static bool dmae_is_busy(struct sh_dmae_chan *sh_chan)
{
u32 chcr = sh_dmae_readl(sh_chan, CHCR);
u32 chcr = chcr_read(sh_chan);
if ((chcr & (CHCR_DE | CHCR_TE)) == CHCR_DE)
return true; /* working */
@ -167,18 +191,23 @@ static void dmae_set_reg(struct sh_dmae_chan *sh_chan, struct sh_dmae_regs *hw)
static void dmae_start(struct sh_dmae_chan *sh_chan)
{
u32 chcr = sh_dmae_readl(sh_chan, CHCR);
struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
u32 chcr = chcr_read(sh_chan);
chcr |= CHCR_DE | CHCR_IE;
sh_dmae_writel(sh_chan, chcr & ~CHCR_TE, CHCR);
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);
}
static void dmae_halt(struct sh_dmae_chan *sh_chan)
{
u32 chcr = sh_dmae_readl(sh_chan, CHCR);
struct sh_dmae_device *shdev = to_sh_dev(sh_chan);
u32 chcr = chcr_read(sh_chan);
chcr &= ~(CHCR_DE | CHCR_TE | CHCR_IE);
sh_dmae_writel(sh_chan, chcr, CHCR);
chcr &= ~(CHCR_DE | CHCR_TE | shdev->chcr_ie_bit);
chcr_write(sh_chan, chcr);
}
static void dmae_init(struct sh_dmae_chan *sh_chan)
@ -190,7 +219,7 @@ static void dmae_init(struct sh_dmae_chan *sh_chan)
u32 chcr = DM_INC | SM_INC | 0x400 | log2size_to_chcr(sh_chan,
LOG2_DEFAULT_XFER_SIZE);
sh_chan->xmit_shift = calc_xmit_shift(sh_chan, chcr);
sh_dmae_writel(sh_chan, chcr, CHCR);
chcr_write(sh_chan, chcr);
}
static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
@ -200,7 +229,7 @@ static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
return -EBUSY;
sh_chan->xmit_shift = calc_xmit_shift(sh_chan, val);
sh_dmae_writel(sh_chan, val, CHCR);
chcr_write(sh_chan, val);
return 0;
}
@ -216,6 +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;
@ -840,7 +872,7 @@ static irqreturn_t sh_dmae_interrupt(int irq, void *data)
spin_lock(&sh_chan->desc_lock);
chcr = sh_dmae_readl(sh_chan, CHCR);
chcr = chcr_read(sh_chan);
if (chcr & CHCR_TE) {
/* DMA stop */
@ -1138,6 +1170,16 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
/* platform data */
shdev->pdata = pdata;
if (pdata->chcr_offset)
shdev->chcr_offset = pdata->chcr_offset;
else
shdev->chcr_offset = CHCR;
if (pdata->chcr_ie_bit)
shdev->chcr_ie_bit = pdata->chcr_ie_bit;
else
shdev->chcr_ie_bit = CHCR_IE;
platform_set_drvdata(pdev, shdev);
pm_runtime_enable(&pdev->dev);

2
drivers/dma/shdma.h
View File

@ -47,6 +47,8 @@ struct sh_dmae_device {
struct list_head node;
u32 __iomem *chan_reg;
u16 __iomem *dmars;
unsigned int chcr_offset;
u32 chcr_ie_bit;
};
#define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)

8
include/linux/sh_dma.h
View File

@ -62,6 +62,12 @@ struct sh_dmae_pdata {
const unsigned int *ts_shift;
int ts_shift_num;
u16 dmaor_init;
unsigned int chcr_offset;
u32 chcr_ie_bit;
unsigned int dmaor_is_32bit:1;
unsigned int needs_tend_set:1;
unsigned int no_dmars:1;
};
/* DMA register */
@ -71,6 +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