sh: prepare the SDHI MFD driver to pass DMA configuration to tmio_mmc.c

Pass DMA slave IDs from platform down to the tmio_mmc driver, to be used
for dmaengine configuration.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 22 insertions, 4 deletions

diff --git a/drivers/mfd/sh_mobile_sdhi.c b/drivers/mfd/sh_mobile_sdhi.c
index 497f91b6138e..555374db8662 100644
--- a/drivers/mfd/sh_mobile_sdhi.c
+++ b/drivers/mfd/sh_mobile_sdhi.c
@@ -26,11 +26,15 @@
 #include <linux/mfd/core.h>
 #include <linux/mfd/tmio.h>
 #include <linux/mfd/sh_mobile_sdhi.h>
+#include <linux/sh_dma.h>
 
 struct sh_mobile_sdhi {
         struct clk *clk;
         struct tmio_mmc_data mmc_data;
         struct mfd_cell cell_mmc;
+        struct sh_dmae_slave param_tx;
+        struct sh_dmae_slave param_rx;
+        struct tmio_mmc_dma dma_priv;
 };
 
 static struct resource sh_mobile_sdhi_resources[] = {
@@ -64,6 +68,8 @@ static void sh_mobile_sdhi_set_pwr(struct platform_device *tmio, int state)
 static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
 {
         struct sh_mobile_sdhi *priv;
+        struct tmio_mmc_data *mmc_data;
+        struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
         struct resource *mem;
         char clk_name[8];
         int ret, irq;
@@ -85,6 +91,8 @@ static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
                 return -ENOMEM;
         }
 
+        mmc_data = &priv->mmc_data;
+
         snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
         priv->clk = clk_get(&pdev->dev, clk_name);
         if (IS_ERR(priv->clk)) {
@@ -96,12 +104,20 @@ static int __init sh_mobile_sdhi_probe(struct platform_device *pdev)
 
         clk_enable(priv->clk);
 
-        priv->mmc_data.hclk = clk_get_rate(priv->clk);
-        priv->mmc_data.set_pwr = sh_mobile_sdhi_set_pwr;
-        priv->mmc_data.capabilities = MMC_CAP_MMC_HIGHSPEED;
+        mmc_data->hclk = clk_get_rate(priv->clk);
+        mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
+        mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
+
+        if (p && p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
+                priv->param_tx.slave_id = p->dma_slave_tx;
+                priv->param_rx.slave_id = p->dma_slave_rx;
+                priv->dma_priv.chan_priv_tx = &priv->param_tx;
+                priv->dma_priv.chan_priv_rx = &priv->param_rx;
+                mmc_data->dma = &priv->dma_priv;
+        }
 
         memcpy(&priv->cell_mmc, &sh_mobile_sdhi_cell, sizeof(priv->cell_mmc));
-        priv->cell_mmc.driver_data = &priv->mmc_data;
+        priv->cell_mmc.driver_data = mmc_data;
         priv->cell_mmc.platform_data = &priv->cell_mmc;
         priv->cell_mmc.data_size = sizeof(priv->cell_mmc);
 
diff --git a/include/linux/mfd/sh_mobile_sdhi.h b/include/linux/mfd/sh_mobile_sdhi.h
index 3bcd7163485c..c305461e7f47 100644
--- a/include/linux/mfd/sh_mobile_sdhi.h
+++ b/include/linux/mfd/sh_mobile_sdhi.h
@@ -2,6 +2,8 @@
 #define __SH_MOBILE_SDHI_H__
 
 struct sh_mobile_sdhi_info {
+        int dma_slave_tx;
+        int dma_slave_rx;
         void (*set_pwr)(struct platform_device *pdev, int state);
 };