diff options
Diffstat (limited to 'driver/usb_mux/anx7451.c')
| -rw-r--r-- | driver/usb_mux/anx7451.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/driver/usb_mux/anx7451.c b/driver/usb_mux/anx7451.c deleted file mode 100644 index 42fdb1f078..0000000000 --- a/driver/usb_mux/anx7451.c +++ /dev/null @@ -1,153 +0,0 @@ -/* Copyright 2021 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. - * - * ANX7451: 10G Active Mux (4x4) with - * Integrated Re-timers for USB3.2/DisplayPort - */ - -#include "anx7451.h" -#include "chipset.h" -#include "common.h" -#include "console.h" -#include "i2c.h" -#include "time.h" -#include "usb_mux.h" -#include "util.h" - -/* - * Empirical testing found it takes ~12ms to wake mux. - * Setting timeout to 20ms for some buffer. - */ -#define ANX7451_I2C_WAKE_TIMEOUT_MS 20 -#define ANX7451_I2C_WAKE_RETRY_DELAY_US 500 - -#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args) -#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args) - -static inline int anx7451_read(const struct usb_mux *me, - uint8_t reg, int *val) -{ - return i2c_read8(me->i2c_port, me->i2c_addr_flags, reg, val); -} - -static inline int anx7451_write(const struct usb_mux *me, - uint8_t reg, uint8_t val) -{ - return i2c_write8(me->i2c_port, me->i2c_addr_flags, reg, val); -} - -static int anx7451_power_off(const struct usb_mux *me) -{ - /* - * The mux will not send an acknowledgment when powered off, so ignore - * response and always return success. - */ - anx7451_write(me, ANX7451_REG_POWER_CNTRL, ANX7451_POWER_CNTRL_OFF); - return EC_SUCCESS; -} - -static int anx7451_wake_up(const struct usb_mux *me) -{ - timestamp_t start; - int rv; - int val; - uint16_t usb_i2c_addr = board_anx7451_get_usb_i2c_addr(me); - - if (chipset_in_state(CHIPSET_STATE_HARD_OFF)) - return EC_ERROR_NOT_POWERED; - - /* Keep reading top register until mux wakes up or timesout */ - start = get_time(); - do { - rv = anx7451_read(me, 0x0, &val); - if (!rv) - break; - usleep(ANX7451_I2C_WAKE_RETRY_DELAY_US); - } while (time_since32(start) < ANX7451_I2C_WAKE_TIMEOUT_MS * MSEC); - if (rv) { - CPRINTS("ANX7451: Failed to wake mux rv:%d", rv); - return EC_ERROR_TIMEOUT; - } - - /* ULTRA_LOW_POWER must always be disabled (Fig 2-2) */ - RETURN_ERROR(anx7451_write(me, ANX7451_REG_ULTRA_LOW_POWER, - ANX7451_ULTRA_LOW_POWER_DIS)); - - /* - * Configure ANX7451 USB I2C address. - * Shift 1 bit to make 7 bit address an 8 bit address. - */ - RETURN_ERROR( - anx7451_write(me, ANX7451_REG_USB_I2C_ADDR, usb_i2c_addr << 1)); - - /* b/185276137: Fix ANX7451 upstream AUX FLIP */ - RETURN_ERROR(i2c_write8(me->i2c_port, usb_i2c_addr, - ANX7451_REG_USB_AUX_FLIP_CTRL, - ANX7451_USB_AUX_FLIP_EN)); - - return EC_SUCCESS; -} - -static int anx7451_set_mux(const struct usb_mux *me, mux_state_t mux_state, - bool *ack_required) -{ - int reg; - - /* This driver does not use host command ACKs */ - *ack_required = false; - - /* - * Mux is not powered in Z1, and will start up in USB mode. Ensure any - * mux sets when off get run again so we don't leave the retimer on with - * the None mode set - */ - if (chipset_in_state(CHIPSET_STATE_HARD_OFF)) - return EC_ERROR_NOT_POWERED; - - /* To disable both DP and USB the mux must be powered off. */ - if (!(mux_state & (USB_PD_MUX_USB_ENABLED | USB_PD_MUX_DP_ENABLED))) - return anx7451_power_off(me); - - RETURN_ERROR(anx7451_wake_up(me)); - - /* ULP_CFG_MODE_EN overrides pin control. Always set it */ - reg = ANX7451_ULP_CFG_MODE_EN; - if (mux_state & USB_PD_MUX_USB_ENABLED) - reg |= ANX7451_ULP_CFG_MODE_USB_EN; - if (mux_state & USB_PD_MUX_DP_ENABLED) - reg |= ANX7451_ULP_CFG_MODE_DP_EN; - if (mux_state & USB_PD_MUX_POLARITY_INVERTED) - reg |= ANX7451_ULP_CFG_MODE_FLIP; - - return anx7451_write(me, ANX7451_REG_ULP_CFG_MODE, reg); -} - -static int anx7451_get_mux(const struct usb_mux *me, mux_state_t *mux_state) -{ - int reg; - - /* Mux is not powered in Z1 */ - if (chipset_in_state(CHIPSET_STATE_HARD_OFF)) - return USB_PD_MUX_NONE; - - RETURN_ERROR(anx7451_wake_up(me)); - - *mux_state = 0; - RETURN_ERROR(anx7451_read(me, ANX7451_REG_ULP_CFG_MODE, ®)); - - if (reg & ANX7451_ULP_CFG_MODE_USB_EN) - *mux_state |= USB_PD_MUX_USB_ENABLED; - if (reg & ANX7451_ULP_CFG_MODE_DP_EN) - *mux_state |= USB_PD_MUX_DP_ENABLED; - if (reg & ANX7451_ULP_CFG_MODE_FLIP) - *mux_state |= USB_PD_MUX_POLARITY_INVERTED; - - return EC_SUCCESS; -} - -const struct usb_mux_driver anx7451_usb_mux_driver = { - .set = anx7451_set_mux, - .get = anx7451_get_mux, - /* Low power mode is not supported on ANX7451 */ -}; |