mmc: tmio: mmc: tmio: tmio_mmc_data has .chan_priv_?x

dma_request_slave_channel_compat() in tmio_mmc_dma
needs .chan_priv_tx/.chan_priv_rx. But these are copied from
sh_mobile_sdhi only, and sh_mobile_sdhi_info is now almost
same as tmio_mmc_data except .chan_priv_?x.
sh_mobile_sdhi_info can be replaced to tmio_mmc_data, but it is
used from ${LINUX}/arch/arm/mach-shmobile, ${LINUX}/arch/sh.
So, this patch adds .chan_priv_?x into tmio_mmc_data as 1st step,
and sh_mobile_sdhi driver has dummy operation for now.
It will be replaced/removed together with platform data replace.

Signed-off-by: Kuninori Morimoto <[e-mail]>
Acked-by: Arnd Bergmann <[e-mail]>
Acked-by: Ulf Hansson <[e-mail]>
Acked-by: Lee Jones <[e-mail]>
Signed-off-by: Vinod Koul <[e-mail]>

drivers/mmc/host/sh_mobile_sdhi.c

···
 		of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
 	struct sh_mobile_sdhi *priv;
 	struct tmio_mmc_data *mmc_data;
+	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
 	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
 	struct tmio_mmc_host *host;
 	struct resource *res;
···
 	else
 		host->bus_shift = 0;
 
-	mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
-	if (p) {
-		mmc_data->flags = p->tmio_flags;
-		mmc_data->ocr_mask = p->tmio_ocr_mask;
-		mmc_data->capabilities |= p->tmio_caps;
-		mmc_data->capabilities2 |= p->tmio_caps2;
-		mmc_data->cd_gpio = p->cd_gpio;
+	if (mmd) {
+		/*
+		 * FIXME
+		 *
+		 * sh_mobile_sdhi_info will be replaced to tmio_mmc_data soon.
+		 * But, sh_mobile_sdhi_info is used under
+		 * ${LINUX}/arch/arm/mach-shmobile/
+		 * ${LINUX}/arch/sh/
+		 * To separate large patch into "tmio_mmc_data has .chan_priv_?x"
+		 * and "replace sh_mobile_sdhi_info in tmio_mmc_data",
+		 * here has dummy method.
+		 * These should be removed.
+		 */
+		struct tmio_mmc_data m;
 
-		if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) {
-			/*
-			 * Yes, we have to provide slave IDs twice to TMIO:
-			 * once as a filter parameter and once for channel
-			 * configuration as an explicit slave ID
-			 */
-			dma_priv->chan_priv_tx = (void *)p->dma_slave_tx;
-			dma_priv->chan_priv_rx = (void *)p->dma_slave_rx;
-		}
+		mmd = &m;
+		m.flags		= p->tmio_flags;
+		m.ocr_mask	= p->tmio_ocr_mask;
+		m.capabilities	= p->tmio_caps;
+		m.capabilities2	= p->tmio_caps2;
+		m.cd_gpio	= p->cd_gpio;
+		m.chan_priv_tx	= (void *)p->dma_slave_tx;
+		m.chan_priv_rx	= (void *)p->dma_slave_rx;
+
+		*mmc_data = *mmd;
 	}
 	dma_priv->filter = shdma_chan_filter;
 	dma_priv->enable = sh_mobile_sdhi_enable_dma;
 
 	mmc_data->alignment_shift = 1; /* 2-byte alignment */
+	mmc_data->capabilities |= MMC_CAP_MMC_HIGHSPEED;
 
 	/*
 	 * All SDHI blocks support 2-byte and larger block sizes in 4-bit

drivers/mmc/host/tmio_mmc.h

···
 struct tmio_mmc_host;
 
 struct tmio_mmc_dma {
-	void *chan_priv_tx;
-	void *chan_priv_rx;
 	enum dma_slave_buswidth dma_buswidth;
 	bool (*filter)(struct dma_chan *chan, void *arg);
 	void (*enable)(struct tmio_mmc_host *host, bool enable);

drivers/mmc/host/tmio_mmc_dma.c

···
 {
 	/* We can only either use DMA for both Tx and Rx or not use it at all */
 	if (!host->dma || (!host->pdev->dev.of_node &&
-		(!host->dma->chan_priv_tx || !host->dma->chan_priv_rx)))
+		(!pdata->chan_priv_tx || !pdata->chan_priv_rx)))
 		return;
 
 	if (!host->chan_tx && !host->chan_rx) {
···
 		dma_cap_set(DMA_SLAVE, mask);
 
 		host->chan_tx = dma_request_slave_channel_compat(mask,
-					host->dma->filter, host->dma->chan_priv_tx,
+					host->dma->filter, pdata->chan_priv_tx,
 					&host->pdev->dev, "tx");
 		dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__,
 			host->chan_tx);
···
 			goto ecfgtx;
 
 		host->chan_rx = dma_request_slave_channel_compat(mask,
-					host->dma->filter, host->dma->chan_priv_rx,
+					host->dma->filter, pdata->chan_priv_rx,
 					&host->pdev->dev, "rx");
 		dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
 			host->chan_rx);

include/linux/mfd/tmio.h

···
  * data for the MMC controller
  */
 struct tmio_mmc_data {
+	void				*chan_priv_tx;
+	void				*chan_priv_rx;
 	unsigned int			hclk;
 	unsigned long			capabilities;
 	unsigned long			capabilities2;