[PATCH v3 39/59] dmaengine: sh: Split device_control

Maxime Ripard
2014-10-22T15:45:52Z

Split the device_control callback of the Super-H DMA driver to make use of the
newly introduced callbacks, that will eventually be used to retrieve slave
capabilities.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
drivers/dma/sh/shdma-base.c | 72 +++++++++++++++++++++------------------------
1 file changed, 33 insertions(+), 39 deletions(-)

diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c
index 42d497416196..706cb2611e4d 100644
--- a/drivers/dma/sh/shdma-base.c
+++ b/drivers/dma/sh/shdma-base.c
@@ -727,57 +727,50 @@ static struct dma_async_tx_descriptor *shdma_prep_dma_cyclic(
return desc;
}

-static int shdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
- unsigned long arg)
+static int shdma_terminate_all(struct dma_chan *chan)
{
struct shdma_chan *schan = to_shdma_chan(chan);
struct shdma_dev *sdev = to_shdma_dev(chan->device);
const struct shdma_ops *ops = sdev->ops;
- struct dma_slave_config *config;
unsigned long flags;
- int ret;

- switch (cmd) {
- case DMA_TERMINATE_ALL:
- spin_lock_irqsave(&schan->chan_lock, flags);
- ops->halt_channel(schan);
+ spin_lock_irqsave(&schan->chan_lock, flags);
+ ops->halt_channel(schan);

- if (ops->get_partial && !list_empty(&schan->ld_queue)) {
- /* Record partial transfer */
- struct shdma_desc *desc = list_first_entry(&schan->ld_queue,
- struct shdma_desc, node);
- desc->partial = ops->get_partial(schan, desc);
- }
+ if (ops->get_partial && !list_empty(&schan->ld_queue)) {
+ /* Record partial transfer */
+ struct shdma_desc *desc = list_first_entry(&schan->ld_queue,
+ struct shdma_desc, node);
+ desc->partial = ops->get_partial(schan, desc);
+ }

- spin_unlock_irqrestore(&schan->chan_lock, flags);
+ spin_unlock_irqrestore(&schan->chan_lock, flags);

- shdma_chan_ld_cleanup(schan, true);
- break;
- case DMA_SLAVE_CONFIG:
- /*
- * So far only .slave_id is used, but the slave drivers are
- * encouraged to also set a transfer direction and an address.
- */
- if (!arg)
- return -EINVAL;
- /*
- * We could lock this, but you shouldn't be configuring the
- * channel, while using it...
- */
- config = (struct dma_slave_config *)arg;
- ret = shdma_setup_slave(schan, config->slave_id,
- config->direction == DMA_DEV_TO_MEM ?
- config->src_addr : config->dst_addr);
- if (ret < 0)
- return ret;
- break;
- default:
- return -ENXIO;
- }
+ shdma_chan_ld_cleanup(schan, true);

return 0;
}

+static int shdma_config(struct dma_chan *chan,
+ struct dma_slave_config *config)
+{
+ struct shdma_chan *schan = to_shdma_chan(chan);
+
+ /*
+ * So far only .slave_id is used, but the slave drivers are
+ * encouraged to also set a transfer direction and an address.
+ */
+ if (!config)
+ return -EINVAL;
+ /*
+ * We could lock this, but you shouldn't be configuring the
+ * channel, while using it...
+ */
+ return shdma_setup_slave(schan, config->slave_id,
+ config->direction == DMA_DEV_TO_MEM ?
+ config->src_addr : config->dst_addr);
+}
+
static void shdma_issue_pending(struct dma_chan *chan)
{
struct shdma_chan *schan = to_shdma_chan(chan);
@@ -1000,7 +993,8 @@ int shdma_init(struct device *dev, struct shdma_dev *sdev,
/* Compulsory for DMA_SLAVE fields */
dma_dev->device_prep_slave_sg = shdma_prep_slave_sg;
dma_dev->device_prep_dma_cyclic = shdma_prep_dma_cyclic;
- dma_dev->device_control = shdma_control;
+ dma_dev->device_config = shdma_config;
+ dma_dev->device_terminate_all = shdma_terminate_all;

dma_dev->dev = dev;

--
2.1.1