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Commit 714c4a6e authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Chris Ball
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mmc: sh_mmcif: simplify platform data 



Provide platforms with a simplified way to specify MMCIF DMA slave IDs in
a way, similar to SDHI and other sh_dma clients.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 67716327

drivers/mmc/host/sh_mmcif.c

+16 −4
Original line number Diff line number Diff line
@@ -165,6 +165,8 @@ struct sh_mmcif_host { 
	struct mmc_host *mmc;

	struct mmc_data *data;

	struct platform_device *pd;

	struct sh_dmae_slave dma_slave_tx;

	struct sh_dmae_slave dma_slave_rx;

	struct clk *hclk;

	unsigned int clk;

	int bus_width;
@@ -323,25 +325,35 @@ static bool sh_mmcif_filter(struct dma_chan *chan, void *arg) 
static void sh_mmcif_request_dma(struct sh_mmcif_host *host,

				 struct sh_mmcif_plat_data *pdata)

{

	struct sh_dmae_slave *tx, *rx;

	host->dma_active = false;



	/* We can only either use DMA for both Tx and Rx or not use it at all */

	if (pdata->dma) {

		dev_warn(&host->pd->dev,

			 "Update your platform to use embedded DMA slave IDs\n");

		tx = &pdata->dma->chan_priv_tx;

		rx = &pdata->dma->chan_priv_rx;

	} else {

		tx = &host->dma_slave_tx;

		tx->slave_id = pdata->slave_id_tx;

		rx = &host->dma_slave_rx;

		rx->slave_id = pdata->slave_id_rx;

	}

	if (tx->slave_id > 0 && rx->slave_id > 0) {

		dma_cap_mask_t mask;



		dma_cap_zero(mask);

		dma_cap_set(DMA_SLAVE, mask);



		host->chan_tx = dma_request_channel(mask, sh_mmcif_filter,

						    &pdata->dma->chan_priv_tx);

		host->chan_tx = dma_request_channel(mask, sh_mmcif_filter, tx);

		dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__,

			host->chan_tx);



		if (!host->chan_tx)

			return;



		host->chan_rx = dma_request_channel(mask, sh_mmcif_filter,

						    &pdata->dma->chan_priv_rx);

		host->chan_rx = dma_request_channel(mask, sh_mmcif_filter, rx);

		dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__,

			host->chan_rx);

include/linux/mmc/sh_mmcif.h

+3 −1
Original line number Diff line number Diff line
@@ -41,7 +41,9 @@ struct sh_mmcif_plat_data { 
	void (*set_pwr)(struct platform_device *pdev, int state);

	void (*down_pwr)(struct platform_device *pdev);

	int (*get_cd)(struct platform_device *pdef);

	struct sh_mmcif_dma	*dma;

	struct sh_mmcif_dma	*dma;		/* Deprecated. Instead */

	unsigned int		slave_id_tx;	/* use embedded slave_id_[tr]x */

	unsigned int		slave_id_rx;

	u8			sup_pclk;	/* 1 :SH7757, 0: SH7724/SH7372 */

	unsigned long		caps;

	u32			ocr;