1// SPDX-License-Identifier: BSD-3-Clause
2/*
3 * Copyright (c) 2020, MIPI Alliance, Inc.
4 *
5 * Author: Nicolas Pitre <npitre@baylibre.com>
6 */
7
8#include <linux/device.h>
9#include <linux/bitfield.h>
10#include <linux/i3c/master.h>
11#include <linux/io.h>
12
13#include "hci.h"
14#include "dct.h"
15
16/*
17 * Device Characteristic Table
18 */
19
20void i3c_hci_dct_get_val(struct i3c_hci *hci, unsigned int dct_idx,
21			 u64 *pid, unsigned int *dcr, unsigned int *bcr)
22{
23	void __iomem *reg = hci->DCT_regs + dct_idx * 4 * 4;
24	u32 dct_entry_data[4];
25	unsigned int i;
26
27	for (i = 0; i < 4; i++) {
28		dct_entry_data[i] = readl(reg);
29		reg += 4;
30	}
31
32	*pid = ((u64)dct_entry_data[0]) << (47 - 32 + 1) |
33	       FIELD_GET(W1_MASK(47, 32), dct_entry_data[1]);
34	*dcr = FIELD_GET(W2_MASK(71, 64), dct_entry_data[2]);
35	*bcr = FIELD_GET(W2_MASK(79, 72), dct_entry_data[2]);
36}
37