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| author |   Vinod Koul <vkoul@kernel.org> | 2018-12-31 19:31:42 +0530 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2018-12-31 19:31:42 +0530 |
| commit | 010299bfc2df19c2c330c75c048805939e5ab91b (patch) | |
| tree | 077dbb9274da3b36bcbbe4dcfc18f93ac0590074 /drivers/dma | |
| parent | Merge branch 'topic/dmatest' into for-linus (diff) | |
| parent | dmaengine: dw-dmac: implement dma protection control setting (diff) | |
| download | linux-dev-010299bfc2df19c2c330c75c048805939e5ab91b.tar.xz linux-dev-010299bfc2df19c2c330c75c048805939e5ab91b.zip | |
Merge branch 'topic/dw' into for-linus
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dw/core.c | 2 | ||||
| -rw-r--r-- | drivers/dma/dw/platform.c | 6 | ||||
| -rw-r--r-- | drivers/dma/dw/regs.h | 4 |
3 files changed, 12 insertions, 0 deletions
diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index d0c3e50b39fb..2c5ca1961256 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -160,12 +160,14 @@ static void dwc_initialize_chan_idma32(struct dw_dma_chan *dwc) static void dwc_initialize_chan_dw(struct dw_dma_chan *dwc) { + struct dw_dma *dw = to_dw_dma(dwc->chan.device); u32 cfghi = DWC_CFGH_FIFO_MODE; u32 cfglo = DWC_CFGL_CH_PRIOR(dwc->priority); bool hs_polarity = dwc->dws.hs_polarity; cfghi |= DWC_CFGH_DST_PER(dwc->dws.dst_id); cfghi |= DWC_CFGH_SRC_PER(dwc->dws.src_id); + cfghi |= DWC_CFGH_PROTCTL(dw->pdata->protctl); /* Set polarity of handshake interface */ cfglo |= hs_polarity ? DWC_CFGL_HS_DST_POL | DWC_CFGL_HS_SRC_POL : 0; diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c index f01b2c173fa6..31ff8113c3de 100644 --- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -162,6 +162,12 @@ dw_dma_parse_dt(struct platform_device *pdev) pdata->multi_block[tmp] = 1; } + if (!of_property_read_u32(np, "snps,dma-protection-control", &tmp)) { + if (tmp > CHAN_PROTCTL_MASK) + return NULL; + pdata->protctl = tmp; + } + return pdata; } #else diff --git a/drivers/dma/dw/regs.h b/drivers/dma/dw/regs.h index 09e7dfdbb790..646c9c960c07 100644 --- a/drivers/dma/dw/regs.h +++ b/drivers/dma/dw/regs.h @@ -200,6 +200,10 @@ enum dw_dma_msize { #define DWC_CFGH_FCMODE (1 << 0) #define DWC_CFGH_FIFO_MODE (1 << 1) #define DWC_CFGH_PROTCTL(x) ((x) << 2) +#define DWC_CFGH_PROTCTL_DATA (0 << 2) /* data access - always set */ +#define DWC_CFGH_PROTCTL_PRIV (1 << 2) /* privileged -> AHB HPROT[1] */ +#define DWC_CFGH_PROTCTL_BUFFER (2 << 2) /* bufferable -> AHB HPROT[2] */ +#define DWC_CFGH_PROTCTL_CACHE (4 << 2) /* cacheable -> AHB HPROT[3] */ #define DWC_CFGH_DS_UPD_EN (1 << 5) #define DWC_CFGH_SS_UPD_EN (1 << 6) #define DWC_CFGH_SRC_PER(x) ((x) << 7) |