diff options
Diffstat (limited to 'driver/retimer/nb7v904m.c')
| -rw-r--r-- | driver/retimer/nb7v904m.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/driver/retimer/nb7v904m.c b/driver/retimer/nb7v904m.c deleted file mode 100644 index 94e96230b2..0000000000 --- a/driver/retimer/nb7v904m.c +++ /dev/null @@ -1,228 +0,0 @@ -/* Copyright 2020 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - * - * ON Semiconductor NB7V904M USB Type-C DisplayPort Alt Mode Redriver - */ -#include <stdbool.h> -#include "common.h" -#include "console.h" -#include "ec_commands.h" -#include "i2c.h" -#include "nb7v904m.h" -#include "usb_mux.h" - -#define CPRINTS(format, args...) cprints(CC_USB, format, ## args) -#define CPRINTF(format, args...) cprintf(CC_USB, format, ## args) - -#ifdef CONFIG_NB7V904M_LPM_OVERRIDE -int nb7v904m_lpm_disable = 0; -#endif - -static int nb7v904m_write(const struct usb_mux *me, int offset, int data) -{ - return i2c_write8(me->i2c_port, - me->i2c_addr_flags, - offset, data); - -} - -static int nb7v904m_read(const struct usb_mux *me, int offset, int *regval) -{ - return i2c_read8(me->i2c_port, - me->i2c_addr_flags, - offset, regval); - -} - -static int set_low_power_mode(const struct usb_mux *me, bool enable) -{ - int regval; - int rv; - - rv = nb7v904m_read(me, NB7V904M_REG_GEN_DEV_SETTINGS, ®val); - if (rv) - return rv; -#ifdef CONFIG_NB7V904M_LPM_OVERRIDE - if (nb7v904m_lpm_disable) - enable = 0; -#endif - - if (enable) - regval &= ~NB7V904M_CHIP_EN; - else - regval |= NB7V904M_CHIP_EN; - - return nb7v904m_write(me, NB7V904M_REG_GEN_DEV_SETTINGS, regval); -} - -static int nb7v904m_enter_low_power_mode(const struct usb_mux *me) -{ - int rv = set_low_power_mode(me, 1); - - if (rv) - CPRINTS("C%d: NB7V904M: Failed to enter low power mode!", - me->usb_port); - return rv; -} - -/* Tune USB Eq All: This must be called on board_init context */ -int nb7v904m_tune_usb_set_eq(const struct usb_mux *me, uint8_t eq_a, - uint8_t eq_b, uint8_t eq_c, uint8_t eq_d) -{ - int rv = EC_SUCCESS; - - if (eq_a != NB7V904M_CH_ALL_SKIP_EQ) - rv = nb7v904m_write(me, NB7V904M_REG_CH_A_EQ_SETTINGS, eq_a); - - if (eq_b != NB7V904M_CH_ALL_SKIP_EQ) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_B_EQ_SETTINGS, eq_b); - - if (eq_c != NB7V904M_CH_ALL_SKIP_EQ) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_C_EQ_SETTINGS, eq_c); - - if (eq_d != NB7V904M_CH_ALL_SKIP_EQ) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_D_EQ_SETTINGS, eq_d); - - return rv; -} - -/* Tune USB Flat Gain: This must be called on board_init context */ -int nb7v904m_tune_usb_flat_gain(const struct usb_mux *me, uint8_t gain_a, - uint8_t gain_b, uint8_t gain_c, uint8_t gain_d) -{ - int rv = EC_SUCCESS; - - if (gain_a != NB7V904M_CH_ALL_SKIP_GAIN) - rv = nb7v904m_write(me, NB7V904M_REG_CH_A_FLAT_GAIN, gain_a); - - if (gain_b != NB7V904M_CH_ALL_SKIP_GAIN) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_B_FLAT_GAIN, gain_b); - - if (gain_c != NB7V904M_CH_ALL_SKIP_GAIN) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_C_FLAT_GAIN, gain_c); - - if (gain_d != NB7V904M_CH_ALL_SKIP_GAIN) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_D_FLAT_GAIN, gain_d); - - return rv; -} - -/* Set Loss Profile Matching : This must be called on board_init context */ -int nb7v904m_set_loss_profile_match(const struct usb_mux *me, uint8_t loss_a, - uint8_t loss_b, uint8_t loss_c, uint8_t loss_d) -{ - int rv = EC_SUCCESS; - - if (loss_a != NB7V904M_CH_ALL_SKIP_LOSS) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_A_LOSS_CTRL, loss_a); - - if (loss_b != NB7V904M_CH_ALL_SKIP_LOSS) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_B_LOSS_CTRL, loss_b); - - if (loss_c != NB7V904M_CH_ALL_SKIP_LOSS) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_C_LOSS_CTRL, loss_c); - - if (loss_d != NB7V904M_CH_ALL_SKIP_LOSS) - rv |= nb7v904m_write(me, NB7V904M_REG_CH_D_LOSS_CTRL, loss_d); - - return rv; -} - -/* Set AUX control switch */ -int nb7v904m_set_aux_ch_switch(const struct usb_mux *me, uint8_t aux_ch) -{ - int rv = EC_SUCCESS; - - rv = nb7v904m_write(me, NB7V904M_REG_AUX_CH_CTRL, aux_ch); - return rv; -} - -static int nb7v904m_init(const struct usb_mux *me) -{ - int rv = set_low_power_mode(me, 0); - - if (rv) - CPRINTS("C%d: NB7V904M: init failed!", me->usb_port); - return rv; -} - -static int nb7v904m_set_mux(const struct usb_mux *me, mux_state_t mux_state, - bool *ack_required) -{ - int rv = EC_SUCCESS; - int regval; - int flipped = !!(mux_state & USB_PD_MUX_POLARITY_INVERTED); - - /* This driver does not use host command ACKs */ - *ack_required = false; - - /* Turn off redriver if it's not needed at all. */ - if (mux_state == USB_PD_MUX_NONE) - return nb7v904m_enter_low_power_mode(me); - - rv = nb7v904m_init(me); - if (rv) - return rv; - - /* Clear operation mode field */ - rv = nb7v904m_read(me, NB7V904M_REG_GEN_DEV_SETTINGS, ®val); - if (rv) { - CPRINTS("C%d %s: Failed to obtain dev settings!", - me->usb_port, __func__); - return rv; - } - regval &= ~NB7V904M_OP_MODE_MASK; - - if (mux_state & USB_PD_MUX_USB_ENABLED) { - /* USB with DP */ - if (mux_state & USB_PD_MUX_DP_ENABLED) { - if (flipped) - regval |= NB7V904M_USB_DP_FLIPPED; - else - regval |= NB7V904M_USB_DP_NORMAL; - } else { - /* USB only */ - regval |= NB7V904M_USB_ONLY; - } - - } else if (mux_state & USB_PD_MUX_DP_ENABLED) { - /* 4 lanes DP */ - regval |= NB7V904M_DP_ONLY; - } - - if (mux_state & USB_PD_MUX_DP_ENABLED) { - /* Connect AUX */ - rv = nb7v904m_write(me, NB7V904M_REG_AUX_CH_CTRL, flipped ? - NB7V904M_AUX_CH_FLIPPED : - NB7V904M_AUX_CH_NORMAL); - /* Enable all channels for DP */ - regval |= NB7V904M_CH_EN_MASK; - } else { - /* Disconnect AUX since it's not being used. */ - rv = nb7v904m_write(me, NB7V904M_REG_AUX_CH_CTRL, - NB7V904M_AUX_CH_HI_Z); - - /* Disable the unused channels to save power */ - regval &= ~NB7V904M_CH_EN_MASK; - if (flipped) { - /* Only enable channels A & B */ - regval |= NB7V904M_CH_A_EN | NB7V904M_CH_B_EN; - } else { - /* Only enable channels C & D */ - regval |= NB7V904M_CH_C_EN | NB7V904M_CH_D_EN; - } - } - - rv |= nb7v904m_write(me, NB7V904M_REG_GEN_DEV_SETTINGS, regval); - if (rv) - CPRINTS("C%d: %s failed!", me->usb_port, __func__); - - return rv; -} - -const struct usb_mux_driver nb7v904m_usb_redriver_drv = { - .enter_low_power_mode = &nb7v904m_enter_low_power_mode, - .init = &nb7v904m_init, - .set = &nb7v904m_set_mux, -}; |