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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.
*/
#include "i2c.h"
#include "tusb1064.h"
#include "usb_mux.h"
#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ##args)
#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ##args)
#if defined(CONFIG_USB_MUX_TUSB1044) + defined(CONFIG_USB_MUX_TUSB1064) + \
defined(CONFIG_USB_MUX_TUSB546) != \
1
#error "Must choose exactly one of CONFIG_USB_MUX_TUSB{546,1044,1064}"
#endif
static int tusb1064_read(const struct usb_mux *me, uint8_t reg, uint8_t *val)
{
int buffer = 0xee;
int res =
i2c_read8(me->i2c_port, me->i2c_addr_flags, (int)reg, &buffer);
*val = buffer;
return res;
}
static int tusb1064_write(const struct usb_mux *me, uint8_t reg, uint8_t val)
{
return i2c_write8(me->i2c_port, me->i2c_addr_flags, (int)reg, (int)val);
}
#if defined(CONFIG_USB_MUX_TUSB1044)
void tusb1044_hpd_update(const struct usb_mux *me, mux_state_t mux_state,
bool *ack_required)
{
int res;
uint8_t reg;
/* This driver does not use host command ACKs */
*ack_required = false;
res = tusb1064_read(me, TUSB1064_REG_GENERAL, ®);
if (res)
return;
/*
* Overrides HPDIN pin state.
Settings of this bit will enable the Display port lanes.
0h = HPD_IN based on HPD_IN pin.
1h = HPD_IN high.
*/
if (mux_state & USB_PD_MUX_HPD_LVL)
reg |= REG_GENERAL_HPDIN_OVERRIDE;
else
reg &= ~REG_GENERAL_HPDIN_OVERRIDE;
tusb1064_write(me, TUSB1064_REG_GENERAL, reg);
}
#endif
int tusb1064_set_dp_rx_eq(const struct usb_mux *me, int db)
{
uint8_t reg;
int rv;
if (db < TUSB1064_DP_EQ_RX_NEG_0_3_DB || db > TUSB1064_DP_EQ_RX_12_1_DB)
return EC_ERROR_INVAL;
/* Set the requested gain values */
reg = TUSB1064_DP1EQ(db) | TUSB1064_DP3EQ(db);
rv = tusb1064_write(me, TUSB1064_REG_DP1DP3EQ_SEL, reg);
if (rv)
return rv;
reg = TUSB1064_DP0EQ(db) | TUSB1064_DP2EQ(db);
rv = tusb1064_write(me, TUSB1064_REG_DP0DP2EQ_SEL, reg);
if (rv)
return rv;
/* Enable EQ_OVERRIDE so the gain registers are used */
rv = tusb1064_read(me, TUSB1064_REG_GENERAL, ®);
if (rv)
return rv;
reg |= REG_GENERAL_EQ_OVERRIDE;
return tusb1064_write(me, TUSB1064_REG_GENERAL, reg);
}
/* Writes control register to set switch mode */
int tusb1064_set_mux(const struct usb_mux *me, mux_state_t mux_state,
bool *ack_required)
{
uint8_t reg;
int rv;
int mask;
/* This driver treats safe mode as none */
if (mux_state & USB_PD_MUX_SAFE_MODE)
mux_state = USB_PD_MUX_NONE;
rv = tusb1064_read(me, TUSB1064_REG_GENERAL, ®);
if (rv)
return rv;
/* Mask bits that may be set in this function */
mask = REG_GENERAL_CTLSEL_USB3 | REG_GENERAL_CTLSEL_ANYDP |
REG_GENERAL_FLIPSEL;
#if defined(CONFIG_USB_MUX_TUSB1044) || defined(CONFIG_USB_MUX_TUSB546)
mask |= REG_GENERAL_HPDIN_OVERRIDE;
#endif
reg &= ~mask;
/* This driver does not use host command ACKs */
*ack_required = false;
if (mux_state & USB_PD_MUX_USB_ENABLED)
reg |= REG_GENERAL_CTLSEL_USB3;
if (mux_state & USB_PD_MUX_DP_ENABLED) {
reg |= REG_GENERAL_CTLSEL_ANYDP;
#ifdef CONFIG_USB_MUX_TUSB546
reg |= REG_GENERAL_HPDIN_OVERRIDE;
#endif
}
if (mux_state & USB_PD_MUX_POLARITY_INVERTED)
reg |= REG_GENERAL_FLIPSEL;
#if defined(CONFIG_USB_MUX_TUSB1044)
if (mux_state & USB_PD_MUX_HPD_LVL)
reg |= REG_GENERAL_HPDIN_OVERRIDE;
#endif
return tusb1064_write(me, TUSB1064_REG_GENERAL, reg);
}
/* Reads control register and updates mux_state accordingly */
static int tusb1064_get_mux(const struct usb_mux *me, mux_state_t *mux_state)
{
uint8_t reg;
int res;
res = tusb1064_read(me, TUSB1064_REG_GENERAL, ®);
if (res)
return EC_ERROR_INVAL;
*mux_state = 0;
if (reg & REG_GENERAL_CTLSEL_USB3)
*mux_state |= USB_PD_MUX_USB_ENABLED;
if (reg & REG_GENERAL_CTLSEL_ANYDP)
*mux_state |= USB_PD_MUX_DP_ENABLED;
if (reg & REG_GENERAL_FLIPSEL)
*mux_state |= USB_PD_MUX_POLARITY_INVERTED;
#if defined(CONFIG_USB_MUX_TUSB1044)
if (reg & REG_GENERAL_HPDIN_OVERRIDE)
*mux_state |= USB_PD_MUX_HPD_LVL;
#endif
return EC_SUCCESS;
}
/* Generic driver init function */
static int tusb1064_init(const struct usb_mux *me)
{
int res;
bool unused;
/*
* Note that bypassing the usb_mux API is okay for internal driver calls
* since the task calling init already holds this port's mux lock.
*/
/* Disconnect USB3.1 and DP */
res = tusb1064_set_mux(me, USB_PD_MUX_NONE, &unused);
if (res)
return res;
/* Disable AUX mux override */
res = tusb1064_write(me, TUSB1064_REG_AUXDPCTRL, 0);
if (res)
return res;
return EC_SUCCESS;
}
const struct usb_mux_driver tusb1064_usb_mux_driver = {
/* CAUTION: This is an UFP/RX/SINK redriver mux */
.init = tusb1064_init,
.set = tusb1064_set_mux,
.get = tusb1064_get_mux,
};
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