68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause */
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/*
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* Copyright (c) 2020, MIPI Alliance, Inc.
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*
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* Author: Nicolas Pitre <npitre@baylibre.com>
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*
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* Common command/response related stuff
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*/
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#ifndef CMD_H
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#define CMD_H
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/*
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* Those bits are common to all descriptor formats and
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* may be manipulated by the core code.
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*/
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#define CMD_0_TOC W0_BIT_(31)
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#define CMD_0_ROC W0_BIT_(30)
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#define CMD_0_ATTR W0_MASK(2, 0)
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/*
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* Response Descriptor Structure
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*/
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#define RESP_STATUS(resp) FIELD_GET(GENMASK(31, 28), resp)
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#define RESP_TID(resp) FIELD_GET(GENMASK(27, 24), resp)
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#define RESP_DATA_LENGTH(resp) FIELD_GET(GENMASK(21, 0), resp)
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#define RESP_ERR_FIELD GENMASK(31, 28)
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enum hci_resp_err {
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RESP_SUCCESS = 0x0,
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RESP_ERR_CRC = 0x1,
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RESP_ERR_PARITY = 0x2,
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RESP_ERR_FRAME = 0x3,
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RESP_ERR_ADDR_HEADER = 0x4,
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RESP_ERR_BCAST_NACK_7E = 0x4,
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RESP_ERR_NACK = 0x5,
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RESP_ERR_OVL = 0x6,
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RESP_ERR_I3C_SHORT_READ = 0x7,
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RESP_ERR_HC_TERMINATED = 0x8,
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RESP_ERR_I2C_WR_DATA_NACK = 0x9,
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RESP_ERR_BUS_XFER_ABORTED = 0x9,
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RESP_ERR_NOT_SUPPORTED = 0xa,
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RESP_ERR_ABORTED_WITH_CRC = 0xb,
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/* 0xc to 0xf are reserved for transfer specific errors */
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};
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/* TID generation (4 bits wide in all cases) */
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#define hci_get_tid(bits) \
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(atomic_inc_return_relaxed(&hci->next_cmd_tid) % (1U << 4))
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/* This abstracts operations with our command descriptor formats */
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struct hci_cmd_ops {
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int (*prep_ccc)(struct i3c_hci *hci, struct hci_xfer *xfer,
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u8 ccc_addr, u8 ccc_cmd, bool raw);
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void (*prep_i3c_xfer)(struct i3c_hci *hci, struct i3c_dev_desc *dev,
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struct hci_xfer *xfer);
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void (*prep_i2c_xfer)(struct i3c_hci *hci, struct i2c_dev_desc *dev,
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struct hci_xfer *xfer);
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int (*perform_daa)(struct i3c_hci *hci);
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};
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/* Our various instances */
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extern const struct hci_cmd_ops mipi_i3c_hci_cmd_v1;
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extern const struct hci_cmd_ops mipi_i3c_hci_cmd_v2;
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#endif
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