DMAENGINE: generic channel status v2

Convert the device_is_tx_complete() operation on the
DMA engine to a generic device_tx_status()operation which
can return three states, DMA_TX_RUNNING, DMA_TX_COMPLETE,
DMA_TX_PAUSED.

[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>

1 files changed, 15 insertions, 12 deletions

diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c
index e69d87f24a25..d9a54c018652 100644
--- a/drivers/dma/ppc4xx/adma.c
+++ b/drivers/dma/ppc4xx/adma.c
@@ -3934,12 +3934,13 @@ static void ppc440spe_adma_free_chan_resources(struct dma_chan *chan)
 }
 
 /**
- * ppc440spe_adma_is_complete - poll the status of an ADMA transaction
+ * ppc440spe_adma_tx_status - poll the status of an ADMA transaction
  * @chan: ADMA channel handle
  * @cookie: ADMA transaction identifier
+ * @txstate: a holder for the current state of the channel
  */
-static enum dma_status ppc440spe_adma_is_complete(struct dma_chan *chan,
-        dma_cookie_t cookie, dma_cookie_t *done, dma_cookie_t *used)
+static enum dma_status ppc440spe_adma_tx_status(struct dma_chan *chan,
+                        dma_cookie_t cookie, struct dma_tx_state *txstate)
 {
         struct ppc440spe_adma_chan *ppc440spe_chan;
         dma_cookie_t last_used;
@@ -3950,10 +3951,11 @@ static enum dma_status ppc440spe_adma_is_complete(struct dma_chan *chan,
         last_used = chan->cookie;
         last_complete = ppc440spe_chan->completed_cookie;
 
-        if (done)
-                *done = last_complete;
-        if (used)
-                *used = last_used;
+        if (txstate) {
+                txstate->last = last_complete;
+                txstate->used = last_used;
+                txstate->residue = 0;
+        }
 
         ret = dma_async_is_complete(cookie, last_complete, last_used);
         if (ret == DMA_SUCCESS)
@@ -3964,10 +3966,11 @@ static enum dma_status ppc440spe_adma_is_complete(struct dma_chan *chan,
         last_used = chan->cookie;
         last_complete = ppc440spe_chan->completed_cookie;
 
-        if (done)
-                *done = last_complete;
-        if (used)
-                *used = last_used;
+        if (txstate) {
+                txstate->last = last_complete;
+                txstate->used = last_used;
+                txstate->residue = 0;
+        }
 
         return dma_async_is_complete(cookie, last_complete, last_used);
 }
@@ -4179,7 +4182,7 @@ static void ppc440spe_adma_init_capabilities(struct ppc440spe_adma_device *adev)
                                 ppc440spe_adma_alloc_chan_resources;
         adev->common.device_free_chan_resources =
                                 ppc440spe_adma_free_chan_resources;
-        adev->common.device_is_tx_complete = ppc440spe_adma_is_complete;
+        adev->common.device_tx_status = ppc440spe_adma_tx_status;
         adev->common.device_issue_pending = ppc440spe_adma_issue_pending;
 
         /* Set prep routines based on capability */