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/* Copyright 2021 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Driver for Kandou KB8001 USB-C 40 Gb/s multiprotocol switch.
*/
#ifndef __CROS_EC_KB800X_H
#define __CROS_EC_KB800X_H
#include "compile_time_macros.h"
#include "gpio_signal.h"
#include "usb_mux.h"
#define KB800X_I2C_ADDR0_FLAGS 0x08
#define KB800X_I2C_ADDR1_FLAGS 0x0C
extern const struct usb_mux_driver kb800x_usb_mux_driver;
/* Set the protocol */
#define KB800X_REG_PROTOCOL 0x0001
#define KB800X_PROTOCOL_USB3 0x0
#define KB800X_PROTOCOL_DPMF 0x1
#define KB800X_PROTOCOL_DP 0x2
#define KB800X_PROTOCOL_CIO 0x3
/* Configure the lane orientaitons */
#define KB800X_REG_ORIENTATION 0x0002
#define KB800X_ORIENTATION_POLARITY 0x1
#define KB800X_ORIENTATION_DP_UFP 0x4
#define KB800X_ORIENTATION_DP_DFP 0x6
#define KB800X_ORIENTATION_CIO_LANE_SWAP 0x8
/* Select one, 0x0 for non-legacy */
#define KB800X_ORIENTATION_CIO_LEGACY_PASSIVE (0x1 << 4)
#define KB800X_ORIENTATION_CIO_LEGACY_UNIDIR (0x2 << 4)
#define KB800X_ORIENTATION_CIO_LEGACY_BIDIR (0x3 << 4)
#define KB800X_REG_RESET 0x0006
#define KB800X_RESET_FSM BIT(0)
#define KB800X_RESET_MM BIT(1)
#define KB800X_RESET_SERDES BIT(2)
#define KB800X_RESET_COM BIT(3)
#define KB800X_RESET_MASK GENMASK(3, 0)
#define KB800X_REG_XBAR_OVR 0x5040
#define KB800X_XBAR_OVR_EN BIT(6)
/* Registers to configure the elastic buffer input connection */
#define KB800X_REG_XBAR_EB1SEL 0x5044
#define KB800X_REG_XBAR_EB23SEL 0x5045
#define KB800X_REG_XBAR_EB4SEL 0x5046
#define KB800X_REG_XBAR_EB56SEL 0x5047
/* Registers to configure the elastic buffer output connection (x=0-7) */
#define KB800X_REG_TXSEL_FROM_PHY(x) (0x5048 + ((x) / 2))
enum kb800x_ss_lane { KB800X_TX0 = 0, KB800X_TX1, KB800X_RX0, KB800X_RX1 };
enum kb800x_phy_lane {
KB800X_A0 = 0,
KB800X_A1,
KB800X_B0,
KB800X_B1,
KB800X_C0,
KB800X_C1,
KB800X_D0,
KB800X_D1,
KB800X_PHY_LANE_COUNT
};
enum kb800x_eb {
KB800X_EB1 = 0,
KB800X_EB2,
KB800X_EB3,
KB800X_EB4,
KB800X_EB5,
KB800X_EB6
};
#define KB800X_FLIP_SS_LANE(x) ((x) + 1 - 2 * ((x)&0x1))
#define KB800X_LANE_NUMBER_FROM_PHY(x) ((x)&0x1)
#define KB800X_PHY_IS_AB(x) ((x) <= KB800X_B1)
struct kb800x_control_t {
enum gpio_signal retimer_rst_gpio;
enum gpio_signal usb_ls_en_gpio;
#ifdef CONFIG_KB800X_CUSTOM_XBAR
enum kb800x_ss_lane ss_lanes[KB800X_PHY_LANE_COUNT];
#endif /* CONFIG_KB800X_CUSTOM_XBAR */
};
/*
* Default 'example' lane mapping. With this mapping, CONFIG_KB800X_CUSTOM_XBAR
* can be undefined, since a custom xbar mapping is not needed.
* ss_lanes = {
* [KB800X_A0] = KB800X_TX0, [KB800X_A1] = KB800X_RX0,
* [KB800X_B0] = KB800X_RX1, [KB800X_B1] = KB800X_TX1,
* [KB800X_C0] = KB800X_RX0, [KB800X_C1] = KB800X_TX0,
* [KB800X_D0] = KB800X_TX1, [KB800X_D1] = KB800X_RX1,}
*/
extern struct kb800x_control_t kb800x_control[];
#endif /* __CROS_EC_KB800X_H */
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