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// SPDX-License-Identifier: GPL-2.0
/* ICSSG Buffer queue helpers
*
* Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com
*/
#include <linux/regmap.h>
#include "icssg_prueth.h"
#define ICSSG_QUEUES_MAX 64
#define ICSSG_QUEUE_OFFSET 0xd00
#define ICSSG_QUEUE_PEEK_OFFSET 0xe00
#define ICSSG_QUEUE_CNT_OFFSET 0xe40
#define ICSSG_QUEUE_RESET_OFFSET 0xf40
int icssg_queue_pop(struct prueth *prueth, u8 queue)
{
u32 val, cnt;
if (queue >= ICSSG_QUEUES_MAX)
return -EINVAL;
regmap_read(prueth->miig_rt, ICSSG_QUEUE_CNT_OFFSET + 4 * queue, &cnt);
if (!cnt)
return -EINVAL;
regmap_read(prueth->miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue, &val);
return val;
}
EXPORT_SYMBOL_GPL(icssg_queue_pop);
void icssg_queue_push(struct prueth *prueth, int queue, u16 addr)
{
if (queue >= ICSSG_QUEUES_MAX)
return;
regmap_write(prueth->miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue, addr);
}
EXPORT_SYMBOL_GPL(icssg_queue_push);
u32 icssg_queue_level(struct prueth *prueth, int queue)
{
u32 reg;
if (queue >= ICSSG_QUEUES_MAX)
return 0;
regmap_read(prueth->miig_rt, ICSSG_QUEUE_CNT_OFFSET + 4 * queue, ®);
return reg;
}
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