lkml.org 
[lkml]   [2016]   [Feb]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] dmaengine: qcom_bam_dma: Make driver work for BE
Date
This patch fixes the Qualcomm BAM dmaenging driver to work with big
endian kernels.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
---
drivers/dma/qcom_bam_dma.c | 19 +++++++++++--------
1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/dma/qcom_bam_dma.c b/drivers/dma/qcom_bam_dma.c
index 5a250cd..37f7aec 100644
--- a/drivers/dma/qcom_bam_dma.c
+++ b/drivers/dma/qcom_bam_dma.c
@@ -53,9 +53,9 @@
#include "virt-dma.h"

struct bam_desc_hw {
- u32 addr; /* Buffer physical address */
- u16 size; /* Buffer size in bytes */
- u16 flags;
+ __le32 addr; /* Buffer physical address */
+ __le16 size; /* Buffer size in bytes */
+ __le16 flags;
};

#define DESC_FLAG_INT BIT(15)
@@ -632,14 +632,15 @@ static struct dma_async_tx_descriptor *bam_prep_slave_sg(struct dma_chan *chan,
unsigned int curr_offset = 0;

do {
- desc->addr = sg_dma_address(sg) + curr_offset;
+ desc->addr = cpu_to_le32(sg_dma_address(sg) +
+ curr_offset);

if (remainder > BAM_MAX_DATA_SIZE) {
- desc->size = BAM_MAX_DATA_SIZE;
+ desc->size = cpu_to_le16(BAM_MAX_DATA_SIZE);
remainder -= BAM_MAX_DATA_SIZE;
curr_offset += BAM_MAX_DATA_SIZE;
} else {
- desc->size = remainder;
+ desc->size = cpu_to_le16(remainder);
remainder = 0;
}

@@ -915,9 +916,11 @@ static void bam_start_dma(struct bam_chan *bchan)

/* set any special flags on the last descriptor */
if (async_desc->num_desc == async_desc->xfer_len)
- desc[async_desc->xfer_len - 1].flags = async_desc->flags;
+ desc[async_desc->xfer_len - 1].flags =
+ cpu_to_le16(async_desc->flags);
else
- desc[async_desc->xfer_len - 1].flags |= DESC_FLAG_INT;
+ desc[async_desc->xfer_len - 1].flags |=
+ cpu_to_le16(DESC_FLAG_INT);

if (bchan->tail + async_desc->xfer_len > MAX_DESCRIPTORS) {
u32 partial = MAX_DESCRIPTORS - bchan->tail;
--
1.9.1
\
 
 \ /
  Last update: 2016-03-01 01:01    [W:0.082 / U:0.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site