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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2012-07-05 12:29:43 +0200
committerVinod Koul <vinod.koul@linux.intel.com>2012-07-20 11:28:54 +0530
commit0e79f9ae1610c15f5e5959c39d7c39071619de97 (patch)
tree0b84805cc1e48875681ad5928f5bcb18b61421a1 /drivers/mmc
parent1ff8df4f5388ad66bd7d0199b5839a2e3345c055 (diff)
downloadop-kernel-dev-0e79f9ae1610c15f5e5959c39d7c39071619de97.zip
op-kernel-dev-0e79f9ae1610c15f5e5959c39d7c39071619de97.tar.gz
mmc: sh_mmcif: switch to the new DMA channel allocation and configuration
Using the "private" field from struct dma_chan is deprecated. The sh dmaengine driver now also supports the preferred DMA channel allocation and configuration method, using a standard filter function and a channel configuration operation. This patch updates sh_mmcif to use this new method. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sh_mmcif.c82
1 files changed, 47 insertions, 35 deletions
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 9e3b9b1..0f07d28 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -211,8 +211,6 @@ struct sh_mmcif_host {
struct mmc_host *mmc;
struct mmc_request *mrq;
struct platform_device *pd;
- struct sh_dmae_slave dma_slave_tx;
- struct sh_dmae_slave dma_slave_rx;
struct clk *hclk;
unsigned int clk;
int bus_width;
@@ -371,52 +369,66 @@ static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host)
desc, cookie);
}
-static bool sh_mmcif_filter(struct dma_chan *chan, void *arg)
-{
- dev_dbg(chan->device->dev, "%s: slave data %p\n", __func__, arg);
- chan->private = arg;
- return true;
-}
-
static void sh_mmcif_request_dma(struct sh_mmcif_host *host,
struct sh_mmcif_plat_data *pdata)
{
- struct sh_dmae_slave *tx, *rx;
+ struct resource *res = platform_get_resource(host->pd, IORESOURCE_MEM, 0);
+ struct dma_slave_config cfg;
+ dma_cap_mask_t mask;
+ int ret;
+
host->dma_active = false;
+ if (pdata->slave_id_tx <= 0 || pdata->slave_id_rx <= 0)
+ return;
+
/* We can only either use DMA for both Tx and Rx or not use it at all */
- tx = &host->dma_slave_tx;
- tx->shdma_slave.slave_id = pdata->slave_id_tx;
- rx = &host->dma_slave_rx;
- rx->shdma_slave.slave_id = pdata->slave_id_rx;
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+
+ host->chan_tx = dma_request_channel(mask, shdma_chan_filter,
+ (void *)pdata->slave_id_tx);
+ dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__,
+ host->chan_tx);
- if (tx->shdma_slave.slave_id > 0 && rx->shdma_slave.slave_id > 0) {
- dma_cap_mask_t mask;
+ if (!host->chan_tx)
+ return;
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
+ cfg.slave_id = pdata->slave_id_tx;
+ cfg.direction = DMA_MEM_TO_DEV;
+ cfg.dst_addr = res->start + MMCIF_CE_DATA;
+ cfg.src_addr = 0;
+ ret = dmaengine_slave_config(host->chan_tx, &cfg);
+ if (ret < 0)
+ goto ecfgtx;
- host->chan_tx = dma_request_channel(mask, sh_mmcif_filter,
- &tx->shdma_slave);
- dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__,
- host->chan_tx);
+ host->chan_rx = dma_request_channel(mask, shdma_chan_filter,
+ (void *)pdata->slave_id_rx);
+ dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__,
+ host->chan_rx);
- if (!host->chan_tx)
- return;
+ if (!host->chan_rx)
+ goto erqrx;
- host->chan_rx = dma_request_channel(mask, sh_mmcif_filter,
- &rx->shdma_slave);
- dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__,
- host->chan_rx);
+ cfg.slave_id = pdata->slave_id_rx;
+ cfg.direction = DMA_DEV_TO_MEM;
+ cfg.dst_addr = 0;
+ cfg.src_addr = res->start + MMCIF_CE_DATA;
+ ret = dmaengine_slave_config(host->chan_rx, &cfg);
+ if (ret < 0)
+ goto ecfgrx;
- if (!host->chan_rx) {
- dma_release_channel(host->chan_tx);
- host->chan_tx = NULL;
- return;
- }
+ init_completion(&host->dma_complete);
- init_completion(&host->dma_complete);
- }
+ return;
+
+ecfgrx:
+ dma_release_channel(host->chan_rx);
+ host->chan_rx = NULL;
+erqrx:
+ecfgtx:
+ dma_release_channel(host->chan_tx);
+ host->chan_tx = NULL;
}
static void sh_mmcif_release_dma(struct sh_mmcif_host *host)
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