1// SPDX-License-Identifier: GPL-2.0
2/* ICSSG Buffer queue helpers
3 *
4 * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com
5 */
6
7#include <linux/regmap.h>
8#include "icssg_prueth.h"
9
10#define ICSSG_QUEUES_MAX		64
11#define ICSSG_QUEUE_OFFSET		0xd00
12#define ICSSG_QUEUE_PEEK_OFFSET		0xe00
13#define ICSSG_QUEUE_CNT_OFFSET		0xe40
14#define	ICSSG_QUEUE_RESET_OFFSET	0xf40
15
16int icssg_queue_pop(struct prueth *prueth, u8 queue)
17{
18	u32 val, cnt;
19
20	if (queue >= ICSSG_QUEUES_MAX)
21		return -EINVAL;
22
23	regmap_read(prueth->miig_rt, ICSSG_QUEUE_CNT_OFFSET + 4 * queue, &cnt);
24	if (!cnt)
25		return -EINVAL;
26
27	regmap_read(prueth->miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue, &val);
28
29	return val;
30}
31
32void icssg_queue_push(struct prueth *prueth, int queue, u16 addr)
33{
34	if (queue >= ICSSG_QUEUES_MAX)
35		return;
36
37	regmap_write(prueth->miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue, addr);
38}
39
40u32 icssg_queue_level(struct prueth *prueth, int queue)
41{
42	u32 reg;
43
44	if (queue >= ICSSG_QUEUES_MAX)
45		return 0;
46
47	regmap_read(prueth->miig_rt, ICSSG_QUEUE_CNT_OFFSET + 4 * queue, &reg);
48
49	return reg;
50}
51