From: Tony Lindgren <tony@atomide.com>
Date: Tue, 1 Nov 2005 20:55:52 +0000 (-0800)
Subject: ARM: OMAP: Add DMA support for 24xx MMC but keep still disabled
X-Git-Tag: v2.6.15-omap2~116
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=f88aaadef947f6093c9bdf26778796e47f1cdf80;p=linux-2.6-omap-h63xx.git

ARM: OMAP: Add DMA support for 24xx MMC but keep still disabled

This patch adds support for 24xx MMC DMA. Since looks like
large reads and writes cause some cache problems, the dma
feature is still disabled for 24xx with use_dma = 0;
---

diff --git a/drivers/mmc/omap.c b/drivers/mmc/omap.c
index ac33592bb97..939ccedfdeb 100644
--- a/drivers/mmc/omap.c
+++ b/drivers/mmc/omap.c
@@ -677,9 +677,11 @@ mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
 	u16 buf, frame;
 	u32 count;
 	struct scatterlist *sg = &data->sg[host->sg_idx];
+	int src_port = 0;
+	int dst_port = 0;
+	int sync_dev = 0;
 
-	data_addr = virt_to_phys((void __force *) host->base)
-				+ OMAP_MMC_REG_DATA;
+	data_addr = io_v2p((void __force *) host->base) + OMAP_MMC_REG_DATA;
 	frame = 1 << data->blksz_bits;
 	count = sg_dma_len(sg);
 
@@ -702,26 +704,38 @@ mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
 
 	if (!(data->flags & MMC_DATA_WRITE)) {
 		buf = 0x800f | ((frame - 1) << 8);
-		omap_set_dma_src_params(dma_ch, OMAP_DMA_PORT_TIPB,
+
+		if (cpu_class_is_omap1()) {
+			src_port = OMAP_DMA_PORT_TIPB;
+			dst_port = OMAP_DMA_PORT_EMIFF;
+		}
+		if (cpu_is_omap24xx())
+			sync_dev = OMAP24XX_DMA_MMC1_RX;
+
+		omap_set_dma_src_params(dma_ch, src_port,
 					OMAP_DMA_AMODE_CONSTANT,
-					data_addr,
-					0, 0);
-		omap_set_dma_dest_params(dma_ch, OMAP_DMA_PORT_EMIFF,
-					OMAP_DMA_AMODE_POST_INC,
-					sg_dma_address(sg),
-					0, 0);
+					data_addr, 0, 0);
+		omap_set_dma_dest_params(dma_ch, dst_port,
+					 OMAP_DMA_AMODE_POST_INC,
+					 sg_dma_address(sg), 0, 0);
 		omap_set_dma_dest_data_pack(dma_ch, 1);
 		omap_set_dma_dest_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
 	} else {
 		buf = 0x0f80 | ((frame - 1) << 0);
-		omap_set_dma_dest_params(dma_ch, OMAP_DMA_PORT_TIPB,
-					OMAP_DMA_AMODE_CONSTANT,
-					data_addr,
-					0, 0);
-		omap_set_dma_src_params(dma_ch, OMAP_DMA_PORT_EMIFF,
+
+		if (cpu_class_is_omap1()) {
+			src_port = OMAP_DMA_PORT_EMIFF;
+			dst_port = OMAP_DMA_PORT_TIPB;
+		}
+		if (cpu_is_omap24xx())
+			sync_dev = OMAP24XX_DMA_MMC1_TX;
+
+		omap_set_dma_dest_params(dma_ch, dst_port,
+					 OMAP_DMA_AMODE_CONSTANT,
+					 data_addr, 0, 0);
+		omap_set_dma_src_params(dma_ch, src_port,
 					OMAP_DMA_AMODE_POST_INC,
-					sg_dma_address(sg),
-					0, 0);
+					sg_dma_address(sg), 0, 0);
 		omap_set_dma_src_data_pack(dma_ch, 1);
 		omap_set_dma_src_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
 	}
@@ -732,8 +746,8 @@ mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
 
 	OMAP_MMC_WRITE(host->base, BUF, buf);
 	omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S16,
-			frame, count, OMAP_DMA_SYNC_FRAME,
-			0, 0);
+				     frame, count, OMAP_DMA_SYNC_FRAME,
+				     sync_dev, 0);
 }
 
 /* a scatterlist segment completed */
@@ -760,7 +774,7 @@ static void mmc_omap_dma_cb(int lch, u16 ch_status, void *data)
 		/* REVISIT we should be able to avoid getting IRQs with
 		 * just SYNC status ...
 		 */
-		if ((ch_status & ~OMAP_DMA_SYNC_IRQ))
+		if ((ch_status & ~OMAP1_DMA_SYNC_IRQ))
 			pr_debug("MMC%d: DMA channel status: %04x\n",
 			       host->id, ch_status);
 		return;