Patchwork [U-Boot,5/6] mxs: mmc: Fix the MMC driver for MX23

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Submitter Marek Vasut
Date Jan. 23, 2013, 1:01 a.m.
Message ID <1358902865-20475-5-git-send-email-marex@denx.de>
Download mbox | patch
Permalink /patch/214705/
State Awaiting Upstream
Delegated to: Stefano Babic
Headers show

Comments

Marek Vasut - Jan. 23, 2013, 1:01 a.m.
The MX23 has different layout of DMA channels. Fix the MMC
driver to support MX23.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefano Babic <sbabic@denx.de>
---
 drivers/mmc/mxsmmc.c |   27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

Patch

diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c
index 023dbd5..a72f66c 100644
--- a/drivers/mmc/mxsmmc.c
+++ b/drivers/mmc/mxsmmc.c
@@ -53,6 +53,12 @@  struct mxsmmc_priv {
 	struct mxs_dma_desc	*desc;
 };
 
+#if defined(CONFIG_MX23)
+static const unsigned int mxsmmc_id_offset = 1;
+#elif defined(CONFIG_MX28)
+static const unsigned int mxsmmc_id_offset = 0;
+#endif
+
 #define	MXSMMC_MAX_TIMEOUT	10000
 #define MXSMMC_SMALL_TRANSFER	512
 
@@ -131,7 +137,7 @@  static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data)
 	priv->desc->cmd.data |= MXS_DMA_DESC_IRQ | MXS_DMA_DESC_DEC_SEM |
 				(data_count << MXS_DMA_DESC_BYTES_OFFSET);
 
-	dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id;
+	dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id + mxsmmc_id_offset;
 	mxs_dma_desc_append(dmach, priv->desc);
 	if (mxs_dma_go(dmach)) {
 		bounce_buffer_stop(&bbstate);
@@ -222,14 +228,25 @@  mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 		}
 
 		ctrl0 |= SSP_CTRL0_DATA_XFER;
+
+		reg = data->blocksize * data->blocks;
+#if defined(CONFIG_MX23)
+		ctrl0 |= reg & SSP_CTRL0_XFER_COUNT_MASK;
+
+		clrsetbits_le32(&ssp_regs->hw_ssp_cmd0,
+			SSP_CMD0_BLOCK_SIZE_MASK | SSP_CMD0_BLOCK_COUNT_MASK,
+			((data->blocks - 1) << SSP_CMD0_BLOCK_COUNT_OFFSET) |
+			((ffs(data->blocksize) - 1) <<
+				SSP_CMD0_BLOCK_SIZE_OFFSET));
+#elif defined(CONFIG_MX28)
+		writel(reg, &ssp_regs->hw_ssp_xfer_size);
+
 		reg = ((data->blocks - 1) <<
 			SSP_BLOCK_SIZE_BLOCK_COUNT_OFFSET) |
 			((ffs(data->blocksize) - 1) <<
 			SSP_BLOCK_SIZE_BLOCK_SIZE_OFFSET);
 		writel(reg, &ssp_regs->hw_ssp_block_size);
-
-		reg = data->blocksize * data->blocks;
-		writel(reg, &ssp_regs->hw_ssp_xfer_size);
+#endif
 	}
 
 	/* Kick off the command */
@@ -401,7 +418,7 @@  int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
 		return -ENOMEM;
 	}
 
-	ret = mxs_dma_init_channel(id);
+	ret = mxs_dma_init_channel(id + mxsmmc_id_offset);
 	if (ret)
 		return ret;