diff options
Diffstat (limited to 'driver/usb_mux/it5205.c')
| -rw-r--r-- | driver/usb_mux/it5205.c | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/driver/usb_mux/it5205.c b/driver/usb_mux/it5205.c deleted file mode 100644 index 0cfecdeda0..0000000000 --- a/driver/usb_mux/it5205.c +++ /dev/null @@ -1,172 +0,0 @@ -/* Copyright 2017 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. - * - * ITE IT5205 Type-C USB alternate mode mux. - */ - -#include "common.h" -#include "i2c.h" -#include "it5205.h" -#include "util.h" - -#define MUX_STATE_DP_USB_MASK (USB_PD_MUX_USB_ENABLED | USB_PD_MUX_DP_ENABLED) - -static int it5205_read(const struct usb_mux *me, uint8_t reg, int *val) -{ - return i2c_read8(me->i2c_port, me->i2c_addr_flags, reg, val); -} - -static int it5205_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 it5205h_sbu_update(const struct usb_mux *me, uint8_t reg, - uint8_t mask, enum mask_update_action action) -{ - return i2c_update8(me->i2c_port, IT5205H_SBU_I2C_ADDR_FLAGS, - reg, mask, action); -} - -static int it5205h_sbu_field_update(const struct usb_mux *me, uint8_t reg, - uint8_t field_mask, uint8_t set_value) -{ - return i2c_field_update8(me->i2c_port, IT5205H_SBU_I2C_ADDR_FLAGS, - reg, field_mask, set_value); -} - -struct mux_chip_id_t { - uint8_t chip_id; - uint8_t reg; -}; - -static const struct mux_chip_id_t mux_chip_id_verify[] = { - { '5', IT5205_REG_CHIP_ID3}, - { '2', IT5205_REG_CHIP_ID2}, - { '0', IT5205_REG_CHIP_ID1}, - { '5', IT5205_REG_CHIP_ID0}, -}; - -static int it5205_init(const struct usb_mux *me) -{ - int i, val, ret; - - /* bit[0]: mux power on, bit[7-1]: reserved. */ - ret = it5205_write(me, IT5205_REG_MUXPDR, 0); - if (ret) - return ret; - /* Verify chip ID registers. */ - for (i = 0; i < ARRAY_SIZE(mux_chip_id_verify); i++) { - ret = it5205_read(me, mux_chip_id_verify[i].reg, &val); - if (ret) - return ret; - - if (val != mux_chip_id_verify[i].chip_id) - return EC_ERROR_UNKNOWN; - } - - if (IS_ENABLED(CONFIG_USB_MUX_IT5205H_SBU_OVP)) { - RETURN_ERROR(it5205h_sbu_field_update(me, IT5205H_REG_VSR, - IT5205H_VREF_SELECT_MASK, - IT5205H_VREF_SELECT_3_3V)); - - RETURN_ERROR(it5205h_sbu_field_update(me, IT5205H_REG_CSBUOVPSR, - IT5205H_OVP_SELECT_MASK, - IT5205H_OVP_3_68V)); - - RETURN_ERROR(it5205h_sbu_update(me, IT5205H_REG_ISR, - IT5205H_ISR_CSBU_MASK, MASK_CLR)); - - RETURN_ERROR(it5205h_enable_csbu_switch(me, true)); - } - - return EC_SUCCESS; -} - -enum ec_error_list it5205h_enable_csbu_switch(const struct usb_mux *me, bool en) -{ - return it5205h_sbu_update(me, IT5205H_REG_CSBUSR, - IT5205H_CSBUSR_SWITCH, en ? MASK_SET : MASK_CLR); -} - -/* Writes control register to set switch mode */ -static int it5205_set_mux(const struct usb_mux *me, mux_state_t mux_state, - bool *ack_required) -{ - uint8_t reg; - - /* This driver does not use host command ACKs */ - *ack_required = false; - - switch (mux_state & MUX_STATE_DP_USB_MASK) { - case USB_PD_MUX_USB_ENABLED: - reg = IT5205_USB; - break; - case USB_PD_MUX_DP_ENABLED: - reg = IT5205_DP; - break; - case MUX_STATE_DP_USB_MASK: - reg = IT5205_DP_USB; - break; - default: - reg = 0; - break; - } - - if (mux_state & USB_PD_MUX_POLARITY_INVERTED) - reg |= IT5205_POLARITY_INVERTED; - - return it5205_write(me, IT5205_REG_MUXCR, reg); -} - -/* Reads control register and updates mux_state accordingly */ -static int it5205_get_mux(const struct usb_mux *me, mux_state_t *mux_state) -{ - int reg, ret; - - ret = it5205_read(me, IT5205_REG_MUXCR, ®); - if (ret) - return ret; - - switch (reg & IT5205_DP_USB_CTRL_MASK) { - case IT5205_USB: - *mux_state = USB_PD_MUX_USB_ENABLED; - break; - case IT5205_DP: - *mux_state = USB_PD_MUX_DP_ENABLED; - break; - case IT5205_DP_USB: - *mux_state = MUX_STATE_DP_USB_MASK; - break; - default: - *mux_state = 0; - break; - } - - if (reg & IT5205_POLARITY_INVERTED) - *mux_state |= USB_PD_MUX_POLARITY_INVERTED; - - return EC_SUCCESS; -} - -static int it5205_enter_low_power_mode(const struct usb_mux *me) -{ - int rv; - - /* Turn off all switches */ - rv = it5205_write(me, IT5205_REG_MUXCR, 0); - - if (rv) - return rv; - - /* Power down mux */ - return it5205_write(me, IT5205_REG_MUXPDR, IT5205_MUX_POWER_DOWN); -} - -const struct usb_mux_driver it5205_usb_mux_driver = { - .init = &it5205_init, - .set = &it5205_set_mux, - .get = &it5205_get_mux, - .enter_low_power_mode = &it5205_enter_low_power_mode, -}; |