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dmaengine: at_hdmac: extend hardware handshaking interface identification 

Peripheral handshaking identification numbers can be bigger than 15, so new
fields have been created in the CFG register.
Add macros to take this modification into account and use them in
at_dma_xlate() function.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Nicolas Ferre 2013-05-10 15:19:14 +02:00 committed by Vinod Koul
parent ea7e79063e
commit 72ae6e4b31
2 changed files with 6 additions and 0 deletions
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2
drivers/dma/at_hdmac.c
View File

@ -1230,6 +1230,8 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec,
per_id = dma_spec->args[1];
atslave->cfg = ATC_FIFOCFG_HALFFIFO | ATC_DST_H2SEL_HW
| ATC_SRC_H2SEL_HW | ATC_DST_PER(per_id)
| ATC_DST_PER_MSB(per_id)
| ATC_SRC_PER_MSB(per_id)
| ATC_SRC_PER(per_id);
atslave->dma_dev = &dmac_pdev->dev;

4
include/linux/platform_data/dma-atmel.h
View File

@ -35,16 +35,20 @@ struct at_dma_slave {
/* Platform-configurable bits in CFG */
#define ATC_PER_MSB(h) ((0x30U & (h)) >> 4) /* Extract most significant bits of a handshaking identifier */
#define ATC_SRC_PER(h) (0xFU & (h)) /* Channel src rq associated with periph handshaking ifc h */
#define ATC_DST_PER(h) ((0xFU & (h)) << 4) /* Channel dst rq associated with periph handshaking ifc h */
#define ATC_SRC_REP (0x1 << 8) /* Source Replay Mod */
#define ATC_SRC_H2SEL (0x1 << 9) /* Source Handshaking Mod */
#define ATC_SRC_H2SEL_SW (0x0 << 9)
#define ATC_SRC_H2SEL_HW (0x1 << 9)
#define ATC_SRC_PER_MSB(h) (ATC_PER_MSB(h) << 10) /* Channel src rq (most significant bits) */
#define ATC_DST_REP (0x1 << 12) /* Destination Replay Mod */
#define ATC_DST_H2SEL (0x1 << 13) /* Destination Handshaking Mod */
#define ATC_DST_H2SEL_SW (0x0 << 13)
#define ATC_DST_H2SEL_HW (0x1 << 13)
#define ATC_DST_PER_MSB(h) (ATC_PER_MSB(h) << 14) /* Channel dst rq (most significant bits) */
#define ATC_SOD (0x1 << 16) /* Stop On Done */
#define ATC_LOCK_IF (0x1 << 20) /* Interface Lock */
#define ATC_LOCK_B (0x1 << 21) /* AHB Bus Lock */