drivers/dma/ti/k3-psil-am62p.c

Source file repositories/reference/linux-study-clean/drivers/dma/ti/k3-psil-am62p.c

File Facts

System
Linux kernel
Corpus path
drivers/dma/ti/k3-psil-am62p.c
Extension
.c
Size
7601 bytes
Lines
326
Domain
Driver Families
Bucket
drivers/dma
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 *  Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com
 */

#include <linux/kernel.h>

#include "k3-psil-priv.h"

#define PSIL_PDMA_XY_TR(x)					\
	{							\
		.thread_id = x,					\
		.ep_config = {					\
			.ep_type = PSIL_EP_PDMA_XY,		\
			.mapped_channel_id = -1,		\
			.default_flow_id = -1,			\
		},						\
	}

#define PSIL_PDMA_XY_PKT(x)					\
	{							\
		.thread_id = x,					\
		.ep_config = {					\
			.ep_type = PSIL_EP_PDMA_XY,		\
			.mapped_channel_id = -1,		\
			.default_flow_id = -1,			\
			.pkt_mode = 1,				\
		},						\
	}

#define PSIL_ETHERNET(x, ch, flow_base, flow_cnt)		\
	{							\
		.thread_id = x,					\
		.ep_config = {					\
			.ep_type = PSIL_EP_NATIVE,		\
			.pkt_mode = 1,				\
			.needs_epib = 1,			\
			.psd_size = 16,				\
			.mapped_channel_id = ch,		\
			.flow_start = flow_base,		\
			.flow_num = flow_cnt,			\
			.default_flow_id = flow_base,		\
		},						\
	}

#define PSIL_SAUL(x, ch, flow_base, flow_cnt, default_flow, tx)	\
	{							\
		.thread_id = x,					\
		.ep_config = {					\
			.ep_type = PSIL_EP_NATIVE,		\
			.pkt_mode = 1,				\
			.needs_epib = 1,			\
			.psd_size = 64,				\
			.mapped_channel_id = ch,		\
			.flow_start = flow_base,		\
			.flow_num = flow_cnt,			\
			.default_flow_id = default_flow,	\
			.notdpkt = tx,				\
		},						\
	}

#define PSIL_PDMA_MCASP(x)				\
	{						\
		.thread_id = x,				\
		.ep_config = {				\
			.ep_type = PSIL_EP_PDMA_XY,	\
			.pdma_acc32 = 1,		\
			.pdma_burst = 1,		\
		},					\
	}

#define PSIL_CSI2RX(x)					\
	{						\
		.thread_id = x,				\
		.ep_config = {				\
			.ep_type = PSIL_EP_NATIVE,	\
		},					\
	}

/* PSI-L source thread IDs, used for RX (DMA_DEV_TO_MEM) */
static struct psil_ep am62p_src_ep_map[] = {
	/* SAUL */
	PSIL_SAUL(0x7504, 20, 35, 8, 35, 0),
	PSIL_SAUL(0x7505, 21, 35, 8, 36, 0),
	PSIL_SAUL(0x7506, 22, 43, 8, 43, 0),
	PSIL_SAUL(0x7507, 23, 43, 8, 44, 0),
	/* PDMA_MAIN0 - SPI0-2 */
	PSIL_PDMA_XY_PKT(0x4300),
	PSIL_PDMA_XY_PKT(0x4301),
	PSIL_PDMA_XY_PKT(0x4302),

Annotation

Implementation Notes