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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Google Inc.
* Copyright (C) 2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#ifndef _SOC_USB_H_
#define _SOC_USB_H_
#include <stdint.h>
#define USB2_EMP_OFF 0
#define USB2_DE_EMP_ON 1
#define USB2_PRE_EMP_ON 2
#define USB2_FULL_BIT_PRE_EMP 0
#define USB2_HALF_BIT_PRE_EMP 1
#define USB2_BIAS_0MV 0
#define USB2_BIAS_11MV 1
#define USB2_BIAS_17MV 2
#define USB2_BIAS_28MV 3
#define USB2_BIAS_28MV2 4
#define USB2_BIAS_39MV 5
#define USB2_BIAS_45MV 6
#define USB2_BIAS_56MV 7
struct usb2_port_config {
uint8_t enable;
uint8_t tx_bias;
uint8_t tx_emp_enable;
uint8_t pre_emp_bias;
uint8_t pre_emp_bit;
};
#define USB2_PORT_EMPTY { \
.enable = 0, \
.tx_bias = USB2_BIAS_0MV, \
.tx_emp_enable = USB2_EMP_OFF, \
.pre_emp_bias = USB2_BIAS_0MV, \
.pre_emp_bit = USB2_HALF_BIT_PRE_EMP, \
}
/*
* Standard USB Port based on length:
* - External
* - Back Panel
* - OTG
* - M.2
* - Internal device down
*/
/* 11.5"-12" */
#define USB2_PORT_LONG { \
.enable = 1, \
.tx_bias = USB2_BIAS_39MV, \
.tx_emp_enable = USB2_PRE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_56MV, \
.pre_emp_bit = USB2_HALF_BIT_PRE_EMP, \
}
/* 6"-11.5" */
#define USB2_PORT_MID { \
.enable = 1, \
.tx_bias = USB2_BIAS_0MV, \
.tx_emp_enable = USB2_PRE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_56MV, \
.pre_emp_bit = USB2_HALF_BIT_PRE_EMP, \
}
/* 3"-6" */
#define USB2_PORT_SHORT { \
.enable = 1, \
.tx_bias = USB2_BIAS_39MV, \
.tx_emp_enable = USB2_PRE_EMP_ON | USB2_DE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_39MV, \
.pre_emp_bit = USB2_FULL_BIT_PRE_EMP, \
}
/* Type-C Port, no BC1.2 charge detect module / MUX */
#define USB2_PORT_TYPE_C { \
.enable = 1, \
.tx_bias = USB2_BIAS_0MV, \
.tx_emp_enable = USB2_PRE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_56MV, \
.pre_emp_bit = USB2_HALF_BIT_PRE_EMP, \
}
/* Port with BC1.2 charge detect module / MUX */
#define USB2_PORT_BC12_MUX { \
.enable = 1, \
.tx_bias = USB2_BIAS_0MV, \
.tx_emp_enable = USB2_PRE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_56MV, \
.pre_emp_bit = USB2_HALF_BIT_PRE_EMP, \
}
/* Internal Flex Cable, 3"-5" + cable + 2" card */
#define USB2_PORT_FLEX { \
.enable = 1, \
.tx_bias = USB2_BIAS_0MV, \
.tx_emp_enable = USB2_PRE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_56MV, \
.pre_emp_bit = USB2_HALF_BIT_PRE_EMP, \
}
/* Docking, 3"-9" */
#define USB2_PORT_DOCKING_LONG { \
.enable = 1, \
.tx_bias = USB2_BIAS_0MV, \
.tx_emp_enable = USB2_PRE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_56MV, \
.pre_emp_bit = USB2_HALF_BIT_PRE_EMP, \
}
/* Docking, 3"-6" */
#define USB2_PORT_DOCKING_SHORT { \
.enable = 1, \
.tx_bias = USB2_BIAS_17MV, \
.tx_emp_enable = USB2_PRE_EMP_ON | USB2_DE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_45MV, \
.pre_emp_bit = USB2_FULL_BIT_PRE_EMP, \
}
/* 2:1 Detachable, 2"-4" on tablet + 2"-4" on base */
#define USB2_PORT_DETACHABLE_TABLET { \
.enable = 1, \
.tx_bias = USB2_BIAS_17MV, \
.tx_emp_enable = USB2_PRE_EMP_ON | USB2_DE_EMP_ON, \
.pre_emp_bias = USB2_BIAS_45MV, \
.pre_emp_bit = USB2_FULL_BIT_PRE_EMP, \
}
struct usb3_port_config {
uint8_t enable;
uint8_t tx_de_emp;
uint8_t tx_downscale_amp;
};
#define USB3_PORT_EMPTY { \
.enable = 0, \
.tx_de_emp = 0x00, \
.tx_downscale_amp = 0x00, \
}
#define USB3_PORT_DEFAULT { \
.enable = 1, \
.tx_de_emp = 0x29, \
.tx_downscale_amp = 0x00, \
}
#endif
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