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mmc: sdhi/tmio: switch to using dmaengine_slave_config() 

This removes the deprecated use of the .private member of struct dma_chan
and switches the sdhi / tmio mmc driver to using the
dmaengine_slave_config() channel configuration method.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Guennadi Liakhovetski 2013-04-26 17:47:18 +02:00 committed by Chris Ball
parent 03a0675b2a
commit eec95ee226
3 changed files with 43 additions and 17 deletions
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33
drivers/mmc/host/sh_mobile_sdhi.c
View File

@ -20,7 +20,6 @@
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/dmaengine.h>
#include <linux/slab.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
@ -47,8 +46,6 @@ static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
struct sh_mobile_sdhi {
struct clk *clk;
struct tmio_mmc_data mmc_data;
struct sh_dmae_slave param_tx;
struct sh_dmae_slave param_rx;
struct tmio_mmc_dma dma_priv;
};
@ -125,13 +122,6 @@ static void sh_mobile_sdhi_cd_wakeup(const struct platform_device *pdev)
mmc_detect_change(dev_get_drvdata(&pdev->dev), msecs_to_jiffies(100));
}
static bool sh_mobile_sdhi_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 const struct sh_mobile_sdhi_ops sdhi_ops = {
.cd_wakeup = sh_mobile_sdhi_cd_wakeup,
};
@ -194,13 +184,22 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
mmc_data->get_cd = sh_mobile_sdhi_get_cd;
if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) {
priv->param_tx.shdma_slave.slave_id = p->dma_slave_tx;
priv->param_rx.shdma_slave.slave_id = p->dma_slave_rx;
priv->dma_priv.chan_priv_tx = &priv->param_tx.shdma_slave;
priv->dma_priv.chan_priv_rx = &priv->param_rx.shdma_slave;
priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
priv->dma_priv.filter = sh_mobile_sdhi_filter;
mmc_data->dma = &priv->dma_priv;
struct tmio_mmc_dma *dma_priv = &priv->dma_priv;
/*
* Yes, we have to provide slave IDs twice to TMIO:
* once as a filter parameter and once for channel
* configuration as an explicit slave ID
*/
dma_priv->chan_priv_tx = (void *)p->dma_slave_tx;
dma_priv->chan_priv_rx = (void *)p->dma_slave_rx;
dma_priv->slave_id_tx = p->dma_slave_tx;
dma_priv->slave_id_rx = p->dma_slave_rx;
dma_priv->alignment_shift = 1; /* 2-byte alignment */
dma_priv->filter = shdma_chan_filter;
mmc_data->dma = dma_priv;
}
}

25
drivers/mmc/host/tmio_mmc_dma.c
View File

@ -268,7 +268,14 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
return;
if (!host->chan_tx && !host->chan_rx) {
struct resource *res = platform_get_resource(host->pdev,
IORESOURCE_MEM, 0);
struct dma_slave_config cfg = {};
dma_cap_mask_t mask;
int ret;
if (!res)
return;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
@ -281,6 +288,14 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
if (!host->chan_tx)
return;
cfg.slave_id = pdata->dma->slave_id_tx;
cfg.direction = DMA_MEM_TO_DEV;
cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->bus_shift);
cfg.src_addr = 0;
ret = dmaengine_slave_config(host->chan_tx, &cfg);
if (ret < 0)
goto ecfgtx;
host->chan_rx = dma_request_channel(mask, pdata->dma->filter,
pdata->dma->chan_priv_rx);
dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
@ -289,6 +304,14 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
if (!host->chan_rx)
goto ereqrx;
cfg.slave_id = pdata->dma->slave_id_rx;
cfg.direction = DMA_DEV_TO_MEM;
cfg.src_addr = cfg.dst_addr;
cfg.dst_addr = 0;
ret = dmaengine_slave_config(host->chan_rx, &cfg);
if (ret < 0)
goto ecfgrx;
host->bounce_buf = (u8 *)__get_free_page(GFP_KERNEL | GFP_DMA);
if (!host->bounce_buf)
goto ebouncebuf;
@ -302,9 +325,11 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
return;
ebouncebuf:
ecfgrx:
dma_release_channel(host->chan_rx);
host->chan_rx = NULL;
ereqrx:
ecfgtx:
dma_release_channel(host->chan_tx);
host->chan_tx = NULL;
}

2
include/linux/mfd/tmio.h
View File

@ -86,6 +86,8 @@ struct dma_chan;
struct tmio_mmc_dma {
void *chan_priv_tx;
void *chan_priv_rx;
int slave_id_tx;
int slave_id_rx;
int alignment_shift;
bool (*filter)(struct dma_chan *chan, void *arg);
};