diff options
Diffstat (limited to 'driver/retimer/pi3dpx1207.c')
| -rw-r--r-- | driver/retimer/pi3dpx1207.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/driver/retimer/pi3dpx1207.c b/driver/retimer/pi3dpx1207.c deleted file mode 100644 index 8829c508a1..0000000000 --- a/driver/retimer/pi3dpx1207.c +++ /dev/null @@ -1,146 +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. - * - * PI3DPX1207 retimer. - */ - -#include "pi3dpx1207.h" -#include "common.h" -#include "console.h" -#include "gpio.h" -#include "i2c.h" -#include "ioexpander.h" -#include "usb_mux.h" - -#define I2C_MAX_RETRIES 2 - -/* Stack space is limited, so put the buffer somewhere else */ -static uint8_t buf[PI3DPX1207_NUM_REGISTERS]; - -/** - * Local utility functions - */ -static int pi3dpx1207_i2c_write(const struct usb_mux *me, - uint8_t offset, - uint8_t val) -{ - int rv = EC_SUCCESS; - int attempt; - - if (offset >= PI3DPX1207_NUM_REGISTERS) - return EC_ERROR_INVAL; - - /* - * PI3DPX1207 does not support device register offset in - * the typical I2C sense. Have to read the values starting - * from 0, modify the byte and then write the block. - * - * NOTE: The device may not respond correctly if it was - * just powered or has gone to sleep. Allow for retries - * in case this happens. - */ - if (offset > 0) { - attempt = 0; - do { - attempt++; - rv = i2c_xfer(me->i2c_port, me->i2c_addr_flags, - NULL, 0, buf, offset); - } while ((rv != EC_SUCCESS) && (attempt < I2C_MAX_RETRIES)); - } - - if (rv == EC_SUCCESS) { - buf[offset] = val; - - attempt = 0; - do { - attempt++; - rv = i2c_xfer(me->i2c_port, me->i2c_addr_flags, - buf, offset + 1, NULL, 0); - } while ((rv != EC_SUCCESS) && (attempt < I2C_MAX_RETRIES)); - } - return rv; -} - -static void pi3dpx1207_shutoff_power(const struct usb_mux *me) -{ - const int port = me->usb_port; - const int gpio_enable = pi3dpx1207_controls[port].enable_gpio; - const int gpio_dp_enable = pi3dpx1207_controls[port].dp_enable_gpio; - - gpio_or_ioex_set_level(gpio_enable, 0); - gpio_or_ioex_set_level(gpio_dp_enable, 0); -} - -/** - * Driver interface code - */ -static int pi3dpx1207_init(const struct usb_mux *me) -{ - const int port = me->usb_port; - const int gpio_enable = pi3dpx1207_controls[port].enable_gpio; - - gpio_or_ioex_set_level(gpio_enable, 1); - return EC_SUCCESS; -} - -static int pi3dpx1207_enter_low_power_mode(const struct usb_mux *me) -{ - pi3dpx1207_shutoff_power(me); - return EC_SUCCESS; -} - -static int pi3dpx1207_set_mux(const struct usb_mux *me, mux_state_t mux_state, - bool *ack_required) -{ - int rv = EC_SUCCESS; - uint8_t mode_val = PI3DPX1207_MODE_WATCHDOG_EN; - const int port = me->usb_port; - const int gpio_enable = pi3dpx1207_controls[port].enable_gpio; - const int gpio_dp_enable = pi3dpx1207_controls[port].dp_enable_gpio; - - /* This driver does not use host command ACKs */ - *ack_required = false; - - /* USB */ - if (mux_state & USB_PD_MUX_USB_ENABLED) { - gpio_or_ioex_set_level(gpio_enable, 1); - /* USB with DP */ - if (mux_state & USB_PD_MUX_DP_ENABLED) { - gpio_or_ioex_set_level(gpio_dp_enable, 1); - mode_val |= (mux_state & USB_PD_MUX_POLARITY_INVERTED) - ? PI3DPX1207_MODE_CONF_USB_DP_FLIP - : PI3DPX1207_MODE_CONF_USB_DP; - } - /* USB without DP */ - else { - gpio_or_ioex_set_level(gpio_dp_enable, 0); - mode_val |= (mux_state & USB_PD_MUX_POLARITY_INVERTED) - ? PI3DPX1207_MODE_CONF_USB_FLIP - : PI3DPX1207_MODE_CONF_USB; - } - } - /* DP without USB */ - else if (mux_state & USB_PD_MUX_DP_ENABLED) { - gpio_or_ioex_set_level(gpio_enable, 1); - gpio_or_ioex_set_level(gpio_dp_enable, 1); - mode_val |= (mux_state & USB_PD_MUX_POLARITY_INVERTED) - ? PI3DPX1207_MODE_CONF_DP_FLIP - : PI3DPX1207_MODE_CONF_DP; - } - /* Nothing enabled, power down the retimer */ - else { - pi3dpx1207_shutoff_power(me); - return EC_SUCCESS; - } - - /* Write the retimer config byte */ - rv = pi3dpx1207_i2c_write(me, PI3DPX1207_MODE_OFFSET, mode_val); - return rv; -} - -const struct usb_mux_driver pi3dpx1207_usb_retimer = { - .init = pi3dpx1207_init, - .set = pi3dpx1207_set_mux, - .enter_low_power_mode = pi3dpx1207_enter_low_power_mode, -}; |