| Message ID | 1413454672-27400-36-git-send-email-maxime.ripard@free-electrons.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Maxime, Thank you for the patch. On Thursday 16 October 2014 12:17:34 Maxime Ripard wrote: > 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> > --- > drivers/dma/sh/shdma-base.c | 72 +++++++++++++++++++----------------------- > 1 file changed, 35 insertions(+), 37 deletions(-) > > diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c > index 42d497416196..eda59515f704 100644 > --- a/drivers/dma/sh/shdma-base.c > +++ b/drivers/dma/sh/shdma-base.c > @@ -727,8 +727,7 @@ 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); > @@ -737,43 +736,41 @@ static int shdma_control(struct dma_chan *chan, enum > dma_ctrl_cmd cmd, 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); > > return 0; You can remove the return 0. With this fixed, Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > } > @@ -1000,7 +997,8 @@ 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;
diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c index 42d497416196..eda59515f704 100644 --- a/drivers/dma/sh/shdma-base.c +++ b/drivers/dma/sh/shdma-base.c @@ -727,8 +727,7 @@ 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); @@ -737,43 +736,41 @@ static int shdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, 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); return 0; } @@ -1000,7 +997,8 @@ 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;
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> --- drivers/dma/sh/shdma-base.c | 72 ++++++++++++++++++++++----------------------- 1 file changed, 35 insertions(+), 37 deletions(-)