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
icssg_queue_pop(struct prueth * prueth,u8 queue)16 int 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
icssg_queue_push(struct prueth * prueth,int queue,u16 addr)32 void 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
icssg_queue_level(struct prueth * prueth,int queue)40 u32 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, ®);
48
49 return reg;
50 }
51