diff options
Diffstat (limited to 'driver/usb_mux/anx3443.c')
| -rw-r--r-- | driver/usb_mux/anx3443.c | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/driver/usb_mux/anx3443.c b/driver/usb_mux/anx3443.c deleted file mode 100644 index 2e57f4d30c..0000000000 --- a/driver/usb_mux/anx3443.c +++ /dev/null @@ -1,162 +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. - * - * ANX3443: 10G Active Mux (6x4) with - * Integrated Re-timers for USB3.2/DisplayPort - */ - -#include "anx3443.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 ANX3443_I2C_WAKE_TIMEOUT_MS 20 -#define ANX3443_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 anx3443_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 anx3443_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 anx3443_power_off(const struct usb_mux *me) -{ - /* - * The mux will not send an acknowledgment when powered off, so ignore - * response and always return success. - */ - anx3443_write(me, ANX3443_REG_POWER_CNTRL, ANX3443_POWER_CNTRL_OFF); - return EC_SUCCESS; -} - -static int anx3443_wake_up(const struct usb_mux *me) -{ - timestamp_t start; - int rv; - int val; - - 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 = anx3443_read(me, 0x0, &val); - if (!rv) - break; - usleep(ANX3443_I2C_WAKE_RETRY_DELAY_US); - } while (time_since32(start) < ANX3443_I2C_WAKE_TIMEOUT_MS * MSEC); - if (rv) { - CPRINTS("ANX3443: Failed to wake mux rv:%d", rv); - return EC_ERROR_TIMEOUT; - } - - /* ULTRA_LOW_POWER must always be disabled (Fig 2-2) */ - RETURN_ERROR(anx3443_write(me, ANX3443_REG_ULTRA_LOW_POWER, - ANX3443_ULTRA_LOW_POWER_DIS)); - - return EC_SUCCESS; -} - -static int anx3443_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 */ - if (chipset_in_state(CHIPSET_STATE_HARD_OFF)) - return (mux_state == USB_PD_MUX_NONE) ? EC_SUCCESS - : 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 anx3443_power_off(me); - - RETURN_ERROR(anx3443_wake_up(me)); - - /* ULP_CFG_MODE_EN overrides pin control. Always set it */ - reg = ANX3443_ULP_CFG_MODE_EN; - if (mux_state & USB_PD_MUX_USB_ENABLED) - reg |= ANX3443_ULP_CFG_MODE_USB_EN; - if (mux_state & USB_PD_MUX_DP_ENABLED) - reg |= ANX3443_ULP_CFG_MODE_DP_EN; - if (mux_state & USB_PD_MUX_POLARITY_INVERTED) - reg |= ANX3443_ULP_CFG_MODE_FLIP; - - return anx3443_write(me, ANX3443_REG_ULP_CFG_MODE, reg); -} - -static int anx3443_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(anx3443_wake_up(me)); - - *mux_state = 0; - RETURN_ERROR(anx3443_read(me, ANX3443_REG_ULP_CFG_MODE, ®)); - - if (reg & ANX3443_ULP_CFG_MODE_USB_EN) - *mux_state |= USB_PD_MUX_USB_ENABLED; - if (reg & ANX3443_ULP_CFG_MODE_DP_EN) - *mux_state |= USB_PD_MUX_DP_ENABLED; - if (reg & ANX3443_ULP_CFG_MODE_FLIP) - *mux_state |= USB_PD_MUX_POLARITY_INVERTED; - - return EC_SUCCESS; -} - -static int anx3443_init(const struct usb_mux *me) -{ - uint64_t now; - bool unused; - - /* - * ANX3443 requires 30ms to power on. EC and ANX3443 are on the same - * power rail, so just wait 30ms since EC boot. - */ - now = get_time().val; - if (now < ANX3443_I2C_READY_DELAY) - usleep(ANX3443_I2C_READY_DELAY - now); - - RETURN_ERROR(anx3443_wake_up(me)); - - /* - * 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. - */ - /* Default to USB mode */ - RETURN_ERROR(anx3443_set_mux(me, USB_PD_MUX_USB_ENABLED, &unused)); - - return EC_SUCCESS; -} - -const struct usb_mux_driver anx3443_usb_mux_driver = { - .init = anx3443_init, - .set = anx3443_set_mux, - .get = anx3443_get_mux, -}; |