diff options
| author | Linus Walleij <linus.walleij@stericsson.com> | 2010-03-26 16:44:01 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2010-03-26 16:44:01 -0700 |
| commit | c3635c78e500a52c9fcd55de381a72928d9e054d (patch) | |
| tree | 87403f402227cd8b5572550e70facf81c9eaa0d9 /drivers/dma/fsldma.c | |
| parent | 0f65169b1bf44220308e1ce1f6666ad03ddc27af (diff) | |
DMAENGINE: generic slave control v2
Convert the device_terminate_all() operation on the
DMA engine to a generic device_control() operation
which can now optionally support also pausing and
resuming DMA on a certain channel. Implemented for the
COH 901 318 DMAC as an example.
[dan.j.williams@intel.com: update for timberdale]
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Maciej Sosnowski <maciej.sosnowski@intel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Li Yang <leoli@freescale.com>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Cc: Magnus Damm <damm@opensource.se>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Joe Perches <joe@perches.com>
Cc: Roland Dreier <rdreier@cisco.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/fsldma.c')
| -rw-r--r-- | drivers/dma/fsldma.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index bbb4be5a3ff..714fc46e769 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -774,13 +774,18 @@ fail: return NULL; } -static void fsl_dma_device_terminate_all(struct dma_chan *dchan) +static int fsl_dma_device_control(struct dma_chan *dchan, + enum dma_ctrl_cmd cmd) { struct fsldma_chan *chan; unsigned long flags; + /* Only supports DMA_TERMINATE_ALL */ + if (cmd != DMA_TERMINATE_ALL) + return -ENXIO; + if (!dchan) - return; + return -EINVAL; chan = to_fsl_chan(dchan); @@ -794,6 +799,8 @@ static void fsl_dma_device_terminate_all(struct dma_chan *dchan) fsldma_free_desc_list(chan, &chan->ld_running); spin_unlock_irqrestore(&chan->desc_lock, flags); + + return 0; } /** @@ -1332,7 +1339,7 @@ static int __devinit fsldma_of_probe(struct of_device *op, fdev->common.device_is_tx_complete = fsl_dma_is_complete; fdev->common.device_issue_pending = fsl_dma_memcpy_issue_pending; fdev->common.device_prep_slave_sg = fsl_dma_prep_slave_sg; - fdev->common.device_terminate_all = fsl_dma_device_terminate_all; + fdev->common.device_control = fsl_dma_device_control; fdev->common.dev = &op->dev; dev_set_drvdata(&op->dev, fdev); |