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ARM: bcm2835: mbox: convert to streaming DMA ops 

Move to the common streaming DMA ops in order to get rid of
the direct usage of the ARM MMU functions for the cache
maintenance.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Lucas Stach 2015-03-05 22:50:20 +01:00 committed by Sascha Hauer
parent 0ba21609c4
commit 59bf5f0b5d
1 changed files with 5 additions and 3 deletions
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8
arch/arm/mach-bcm2835/mbox.c
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@ -7,9 +7,9 @@
*/
#include <asm/io.h>
#include <asm/mmu.h>
#include <common.h>
#include <clock.h>
#include <dma.h>
#include <mach/mbox.h>
@ -55,7 +55,8 @@ static int bcm2835_mbox_call_raw(u32 chan, struct bcm2835_mbox_hdr *buffer,
/* Send the request */
val = BCM2835_MBOX_PACK(chan, send);
debug("mbox: TX raw: 0x%08x\n", val);
dma_flush_range(send, send + buffer->buf_size);
dma_sync_single_for_device((unsigned long)send, buffer->buf_size,
DMA_BIDIRECTIONAL);
writel(val, &regs->write);
/* Wait for the response */
@ -72,7 +73,8 @@ static int bcm2835_mbox_call_raw(u32 chan, struct bcm2835_mbox_hdr *buffer,
/* Read the response */
val = readl(&regs->read);
debug("mbox: RX raw: 0x%08x\n", val);
dma_inv_range(send, send + buffer->buf_size);
dma_sync_single_for_cpu((unsigned long)send, buffer->buf_size,
DMA_BIDIRECTIONAL);
/* Validate the response */
if (BCM2835_MBOX_UNPACK_CHAN(val) != chan) {