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Commit bce95c63 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Vinod Koul
Browse files

dw_dmac: adjust slave_id accordingly to request line base 



On some hardware configurations we have got the request line with the offset.
The patch introduces convert_slave_id() helper for that cases. The request line
base is came from the driver data provided by the platform_device_id table.

Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent f73bb9b3

drivers/dma/dw_dmac.c

+16 −1
Original line number Diff line number Diff line
@@ -1001,6 +1001,13 @@ static inline void convert_burst(u32 *maxburst) 
		*maxburst = 0;

}



static inline void convert_slave_id(struct dw_dma_chan *dwc)

{

	struct dw_dma *dw = to_dw_dma(dwc->chan.device);



	dwc->dma_sconfig.slave_id -= dw->request_line_base;

}



static int

set_runtime_config(struct dma_chan *chan, struct dma_slave_config *sconfig)

{
@@ -1015,6 +1022,7 @@ set_runtime_config(struct dma_chan *chan, struct dma_slave_config *sconfig) 


	convert_burst(&dwc->dma_sconfig.src_maxburst);

	convert_burst(&dwc->dma_sconfig.dst_maxburst);

	convert_slave_id(dwc);



	return 0;

}
@@ -1628,6 +1636,7 @@ dw_dma_parse_dt(struct platform_device *pdev) 


static int dw_probe(struct platform_device *pdev)

{

	const struct platform_device_id *match;

	struct dw_dma_platform_data *pdata;

	struct resource		*io;

	struct dw_dma		*dw;
@@ -1711,6 +1720,11 @@ static int dw_probe(struct platform_device *pdev) 
		memcpy(dw->data_width, pdata->data_width, 4);

	}



	/* Get the base request line if set */

	match = platform_get_device_id(pdev);

	if (match)

		dw->request_line_base = (unsigned int)match->driver_data;



	/* Calculate all channel mask before DMA setup */

	dw->all_chan_mask = (1 << nr_channels) - 1;
@@ -1906,7 +1920,8 @@ MODULE_DEVICE_TABLE(of, dw_dma_id_table); 
#endif



static const struct platform_device_id dw_dma_ids[] = {

	{ "INTL9C60", 0 },

	/* Name,	Request Line Base */

	{ "INTL9C60",	(kernel_ulong_t)16 },

	{ }

};

drivers/dma/dw_dmac_regs.h

+1 −0
Original line number Diff line number Diff line
@@ -247,6 +247,7 @@ struct dw_dma { 
	/* hardware configuration */

	unsigned char		nr_masters;

	unsigned char		data_width[4];

	unsigned int		request_line_base;



	struct dw_dma_chan	chan[0];

};