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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>
This commit is contained in:
Guennadi Liakhovetski 2012-07-05 12:29:43 +02:00 committed by Vinod Koul
parent 1ff8df4f53
commit 0e79f9ae16
1 changed files with 47 additions and 35 deletions
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82
drivers/mmc/host/sh_mmcif.c
View File

@ -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);
if (tx->shdma_slave.slave_id > 0 && rx->shdma_slave.slave_id > 0) {
dma_cap_mask_t 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);
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
if (!host->chan_tx)
return;
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);
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;
if (!host->chan_tx)
return;
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);
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);
if (!host->chan_rx)
goto erqrx;
if (!host->chan_rx) {
dma_release_channel(host->chan_tx);
host->chan_tx = NULL;
return;
}
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;
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)