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Subject[PATCH 9/10] OMAP: HSMMC: Fix MMC3 dma
From 6cdb22ab764bf852097674c26d521d3e8a1e5581 Mon Sep 17 00:00:00 2001
From: Grazvydas Ignotas <notasas at>
Date: Sat, 3 Jan 2009 10:36:13 +0000
Subject: [PATCH] OMAP: HSMMC: Fix MMC3 dma
Data transfers on third OMAP3 MMC controller don't work
because DMA line numbers are only defined for MMC1 and MMC2.
Fix that and store line numbers in mmc_omap_host structure
to reduce code size.
Tested on OMAP3 pandora board.

Signed-off-by: Grazvydas Ignotas <notasas <at> gmail.com>
---
drivers/mmc/host/omap_hsmmc.c | 36 +++++++++++++++++++++++++-----------
1 files changed, 25 insertions(+), 11 deletions(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 0e47073..91381f4 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -100,6 +100,7 @@
*/
#define OMAP_MMC1_DEVID 0
#define OMAP_MMC2_DEVID 1
+#define OMAP_MMC3_DEVID 2

#define MMC_TIMEOUT_MS 20
#define OMAP_MMC_MASTER_CLOCK 96000000
@@ -147,6 +148,7 @@ struct mmc_omap_host {
int irq;
int carddetect;
int use_dma, dma_ch;
+ int dma_line_tx, dma_line_rx;
int slot_id;
int dbclk_enabled;
int response_busy;
@@ -652,17 +654,10 @@ static int mmc_omap_get_dma_sync_dev(struct mmc_omap_host *host,
{
int sync_dev;

- if (data->flags & MMC_DATA_WRITE) {
- if (host->id == OMAP_MMC1_DEVID)
- sync_dev = OMAP24XX_DMA_MMC1_TX;
- else
- sync_dev = OMAP24XX_DMA_MMC2_TX;
- } else {
- if (host->id == OMAP_MMC1_DEVID)
- sync_dev = OMAP24XX_DMA_MMC1_RX;
- else
- sync_dev = OMAP24XX_DMA_MMC2_RX;
- }
+ if (data->flags & MMC_DATA_WRITE)
+ sync_dev = host->dma_line_tx;
+ else
+ sync_dev = host->dma_line_rx;
return sync_dev;
}

@@ -1134,6 +1129,25 @@ static int __init omap_mmc_probe(struct platform_device *pdev)

omap_hsmmc_init(host);

+ /* Select DMA lines */
+ switch (host->id) {
+ case OMAP_MMC1_DEVID:
+ host->dma_line_tx = OMAP24XX_DMA_MMC1_TX;
+ host->dma_line_rx = OMAP24XX_DMA_MMC1_RX;
+ break;
+ case OMAP_MMC2_DEVID:
+ host->dma_line_tx = OMAP24XX_DMA_MMC2_TX;
+ host->dma_line_rx = OMAP24XX_DMA_MMC2_RX;
+ break;
+ case OMAP_MMC3_DEVID:
+ host->dma_line_tx = OMAP34XX_DMA_MMC3_TX;
+ host->dma_line_rx = OMAP34XX_DMA_MMC3_RX;
+ break;
+ default:
+ dev_err(mmc_dev(host->mmc), "Invalid MMC id\n");
+ goto err_irq;
+ }
+
/* Request IRQ for MMC operations */
ret = request_irq(host->irq, mmc_omap_irq, IRQF_DISABLED,
mmc_hostname(mmc), host);
--
1.5.6.3


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