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authorGregory CLEMENT <gregory.clement@free-electrons.com>2016-04-29 09:49:06 +0200
committerVinod Koul <vinod.koul@intel.com>2016-05-03 12:27:47 +0530
commitdd130c652cb745e82b70cb71a3cf2dd876295e96 (patch)
treee4e8f99051df614ec14c8143e7e2cde78b0c4f06
parentbc822e1251f908ab2560365d388f36afb9da255a (diff)
dmaengine: mv_xor: use SoC type instead of directly the operation mode
Currently the main difference between legacy XOR engine and newer one, is the way the engine modes are setup (either in the descriptor or through the controller registers). In order to be able to take into account new generation of the XOR engine for the ARM64 SoC, we need to identify them by type, and then depending to the type the engine setup will be selected. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
-rw-r--r--drivers/dma/mv_xor.c40
-rw-r--r--drivers/dma/mv_xor.h1
2 files changed, 29 insertions, 12 deletions
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index a6ec827..6d012a5 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -31,6 +31,11 @@
#include "dmaengine.h"
#include "mv_xor.h"
+enum mv_xor_type {
+ XOR_ORION,
+ XOR_ARMADA_38X,
+};
+
enum mv_xor_mode {
XOR_MODE_IN_REG,
XOR_MODE_IN_DESC,
@@ -933,7 +938,7 @@ static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
static struct mv_xor_chan *
mv_xor_channel_add(struct mv_xor_device *xordev,
struct platform_device *pdev,
- int idx, dma_cap_mask_t cap_mask, int irq, int op_in_desc)
+ int idx, dma_cap_mask_t cap_mask, int irq)
{
int ret = 0;
struct mv_xor_chan *mv_chan;
@@ -945,7 +950,10 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
mv_chan->idx = idx;
mv_chan->irq = irq;
- mv_chan->op_in_desc = op_in_desc;
+ if (xordev->xor_type == XOR_ORION)
+ mv_chan->op_in_desc = XOR_MODE_IN_REG;
+ else
+ mv_chan->op_in_desc = XOR_MODE_IN_DESC;
dma_dev = &mv_chan->dmadev;
@@ -1137,8 +1145,8 @@ static int mv_xor_resume(struct platform_device *dev)
}
static const struct of_device_id mv_xor_dt_ids[] = {
- { .compatible = "marvell,orion-xor", .data = (void *)XOR_MODE_IN_REG },
- { .compatible = "marvell,armada-380-xor", .data = (void *)XOR_MODE_IN_DESC },
+ { .compatible = "marvell,orion-xor", .data = (void *)XOR_ORION },
+ { .compatible = "marvell,armada-380-xor", .data = (void *)XOR_ARMADA_38X },
{},
};
@@ -1152,7 +1160,6 @@ static int mv_xor_probe(struct platform_device *pdev)
struct resource *res;
unsigned int max_engines, max_channels;
int i, ret;
- int op_in_desc;
dev_notice(&pdev->dev, "Marvell shared XOR driver\n");
@@ -1180,6 +1187,20 @@ static int mv_xor_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, xordev);
+
+ /*
+ * We need to know which type of XOR device we use before
+ * setting up. In non-dt case it can only be the legacy one.
+ */
+ xordev->xor_type = XOR_ORION;
+ if (pdev->dev.of_node) {
+ const struct of_device_id *of_id =
+ of_match_device(mv_xor_dt_ids,
+ &pdev->dev);
+
+ xordev->xor_type = (uintptr_t)of_id->data;
+ }
+
/*
* (Re-)program MBUS remapping windows if we are asked to.
*/
@@ -1212,15 +1233,11 @@ static int mv_xor_probe(struct platform_device *pdev)
if (pdev->dev.of_node) {
struct device_node *np;
int i = 0;
- const struct of_device_id *of_id =
- of_match_device(mv_xor_dt_ids,
- &pdev->dev);
for_each_child_of_node(pdev->dev.of_node, np) {
struct mv_xor_chan *chan;
dma_cap_mask_t cap_mask;
int irq;
- op_in_desc = (uintptr_t)of_id->data;
if (i >= max_channels)
continue;
@@ -1237,7 +1254,7 @@ static int mv_xor_probe(struct platform_device *pdev)
}
chan = mv_xor_channel_add(xordev, pdev, i,
- cap_mask, irq, op_in_desc);
+ cap_mask, irq);
if (IS_ERR(chan)) {
ret = PTR_ERR(chan);
irq_dispose_mapping(irq);
@@ -1266,8 +1283,7 @@ static int mv_xor_probe(struct platform_device *pdev)
}
chan = mv_xor_channel_add(xordev, pdev, i,
- cd->cap_mask, irq,
- XOR_MODE_IN_REG);
+ cd->cap_mask, irq);
if (IS_ERR(chan)) {
ret = PTR_ERR(chan);
goto err_channel_add;
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index c19fe30..bf56e08 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -85,6 +85,7 @@ struct mv_xor_device {
void __iomem *xor_high_base;
struct clk *clk;
struct mv_xor_chan *channels[MV_XOR_MAX_CHANNELS];
+ int xor_type;
};
/**