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ata/pata_arasan_cf: fill dma chan->private from pdata->dma_priv 

Some DMA controllers (eg: drivers/dma/dw_dmac*) allow platform specific
configuration for dma transfers. User drivers need to set chan->private field
of channel with pointer to configuration data. This patch takes dma_priv data
from platform data and passes it to chan->private_data, in order to pass
platform specific configuration to DMAC controller.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
hifive-unleashed-5.1
Viresh Kumar 2011-03-04 16:39:29 +05:30 committed by Jeff Garzik
parent 8d7b1c70b3
commit 60a230e4a6
2 changed files with 8 additions and 1 deletions
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7
drivers/ata/pata_arasan_cf.c
View File

@ -210,6 +210,8 @@ struct arasan_cf_dev {
struct dma_chan *dma_chan;
/* Mask for DMA transfers */
dma_cap_mask_t mask;
/* dma channel private data */
void *dma_priv;
/* DMA transfer work */
struct work_struct work;
/* DMA delayed finish work */
@ -356,6 +358,7 @@ static void dma_callback(void *dev)
static bool filter(struct dma_chan *chan, void *slave)
{
chan->private = slave;
return true;
}
@ -526,7 +529,8 @@ static void data_xfer(struct work_struct *work)
/* request dma channels */
/* dma_request_channel may sleep, so calling from process context */
acdev->dma_chan = dma_request_channel(acdev->mask, filter, NULL);
acdev->dma_chan = dma_request_channel(acdev->mask, filter,
acdev->dma_priv);
if (!acdev->dma_chan) {
dev_err(acdev->host->dev, "Unable to get dma_chan\n");
goto chan_request_fail;
@ -853,6 +857,7 @@ static int __devinit arasan_cf_probe(struct platform_device *pdev)
INIT_WORK(&acdev->work, data_xfer);
INIT_DELAYED_WORK(&acdev->dwork, delayed_finish);
dma_cap_set(DMA_MEMCPY, acdev->mask);
acdev->dma_priv = pdata->dma_priv;
/* Handle platform specific quirks */
if (pdata->quirk) {

2
include/linux/pata_arasan_cf_data.h
View File

@ -37,6 +37,8 @@ struct arasan_cf_pdata {
#define CF_BROKEN_PIO (1)
#define CF_BROKEN_MWDMA (1 << 1)
#define CF_BROKEN_UDMA (1 << 2)
/* This is platform specific data for the DMA controller */
void *dma_priv;
};
static inline void