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 20 void 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