diff options
Diffstat (limited to 'driver/usb_mux/anx7440.c')
| -rw-r--r-- | driver/usb_mux/anx7440.c | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/driver/usb_mux/anx7440.c b/driver/usb_mux/anx7440.c deleted file mode 100644 index 89e593217d..0000000000 --- a/driver/usb_mux/anx7440.c +++ /dev/null @@ -1,112 +0,0 @@ -/* Copyright 2019 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. - * - * Analogix ANX7440 USB Type-C Active mux with - * Integrated Re-timers for USB3.1/DisplayPort. - */ - -#include "anx7440.h" -#include "common.h" -#include "console.h" -#include "i2c.h" -#include "usb_mux.h" -#include "util.h" - -#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args) -#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args) - -static inline int anx7440_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 anx7440_write(const struct usb_mux *me, - uint8_t reg, uint8_t val) -{ - return i2c_write8(me->i2c_port, me->i2c_addr_flags, reg, val); -} - -struct anx7440_id_t { - uint8_t val; - uint8_t reg; -}; - -static const struct anx7440_id_t anx7440_device_ids[] = { - { ANX7440_VENDOR_ID_L, ANX7440_REG_VENDOR_ID_L }, - { ANX7440_VENDOR_ID_H, ANX7440_REG_VENDOR_ID_H }, - { ANX7440_DEVICE_ID_L, ANX7440_REG_DEVICE_ID_L }, - { ANX7440_DEVICE_ID_H, ANX7440_REG_DEVICE_ID_H }, - { ANX7440_DEVICE_VERSION, ANX7440_REG_DEVICE_VERSION }, -}; - -static int anx7440_init(const struct usb_mux *me) -{ - int i; - int val; - int res; - - /* Verify device id / version registers */ - for (i = 0; i < ARRAY_SIZE(anx7440_device_ids); i++) { - res = anx7440_read(me, anx7440_device_ids[i].reg, &val); - if (res) - return res; - - if (val != anx7440_device_ids[i].val) - return EC_ERROR_UNKNOWN; - } - - return EC_SUCCESS; -} - -/* Writes control register to set switch mode */ -static int anx7440_set_mux(const struct usb_mux *me, mux_state_t mux_state, - bool *ack_required) -{ - int reg, res; - - /* This driver does not use host command ACKs */ - *ack_required = false; - - res = anx7440_read(me, ANX7440_REG_CHIP_CTRL, ®); - if (res) - return res; - - reg &= ~ANX7440_CHIP_CTRL_SW_OP_MODE_CLEAR; - if (mux_state & USB_PD_MUX_USB_ENABLED) - reg |= ANX7440_CHIP_CTRL_SW_OP_MODE_USB; - if (mux_state & USB_PD_MUX_DP_ENABLED) - reg |= ANX7440_CHIP_CTRL_SW_OP_MODE_DP; - if (mux_state & USB_PD_MUX_POLARITY_INVERTED) - reg |= ANX7440_CHIP_CTRL_SW_FLIP; - - return anx7440_write(me, ANX7440_REG_CHIP_CTRL, reg); -} - -/* Reads control register and updates mux_state accordingly */ -static int anx7440_get_mux(const struct usb_mux *me, mux_state_t *mux_state) -{ - int reg, res; - - *mux_state = 0; - res = anx7440_read(me, ANX7440_REG_CHIP_CTRL, ®); - if (res) - return res; - - if (reg & ANX7440_CHIP_CTRL_OP_MODE_FINAL_USB) - *mux_state |= USB_PD_MUX_USB_ENABLED; - if (reg & ANX7440_CHIP_CTRL_OP_MODE_FINAL_DP) - *mux_state |= USB_PD_MUX_DP_ENABLED; - if (reg & ANX7440_CHIP_CTRL_FINAL_FLIP) - *mux_state |= USB_PD_MUX_POLARITY_INVERTED; - - return EC_SUCCESS; -} - -const struct usb_mux_driver anx7440_usb_mux_driver = { - .init = anx7440_init, - .set = anx7440_set_mux, - .get = anx7440_get_mux, - /* TODO(b/146683781): add low power mode */ -}; |