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dma: ti: add driver to K3 UDMA

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The UDMA-P is intended to perform similar (but significantly upgraded) functions
as the packet-oriented DMA used on previous SoC devices. The UDMA-P module
supports the transmission and reception of various packet types.
The UDMA-P also supports acting as both a UTC and UDMA-C for its internal
channels. Channels in the UDMA-P can be configured to be either Packet-Based or
Third-Party channels on a channel by channel basis.

The initial driver supports:
- MEM_TO_MEM (TR mode)
- DEV_TO_MEM (Packet mode)
- MEM_TO_DEV (Packet mode)

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
This commit is contained in:
Vignesh R
2019-02-05 17:31:24 +05:30
committed by Tom Rini
parent 17ef3c4c28
commit ffcc66e8fe
8 changed files with 1990 additions and 0 deletions
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31
include/dt-bindings/dma/k3-udma.h Normal file
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
*/
#ifndef __DT_TI_UDMA_H
#define __DT_TI_UDMA_H
#define UDMA_TR_MODE 0
#define UDMA_PKT_MODE 1
#define UDMA_DIR_TX 0
#define UDMA_DIR_RX 1
#define PSIL_STATIC_TR_NONE 0
#define PSIL_STATIC_TR_XY 1
#define PSIL_STATIC_TR_MCAN 2
#define UDMA_PDMA_TR_XY(id) \
ti,psil-config##id { \
linux,udma-mode = <UDMA_TR_MODE>; \
statictr-type = <PSIL_STATIC_TR_XY>; \
}
#define UDMA_PDMA_PKT_XY(id) \
ti,psil-config##id { \
linux,udma-mode = <UDMA_PKT_MODE>; \
statictr-type = <PSIL_STATIC_TR_XY>; \
}
#endif /* __DT_TI_UDMA_H */

24
include/linux/soc/ti/ti-udma.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
*/
#ifndef __TI_UDMA_H
#define __TI_UDMA_H
/**
* struct ti_udma_drv_packet_data - TI UDMA transfer specific data
*
* @pkt_type: Packet Type - specific for each DMA client HW
* @dest_tag: Destination tag The source pointer.
*
* TI UDMA transfer specific data passed as part of DMA transfer to
* the DMA client HW in UDMA descriptors.
*/
struct ti_udma_drv_packet_data {
u32 pkt_type;
u32 dest_tag;
};
#endif /* __TI_UDMA_H */