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Diffstat (limited to 'driver/retimer/ps8802.c')
-rw-r--r--driver/retimer/ps8802.c317
1 files changed, 0 insertions, 317 deletions
diff --git a/driver/retimer/ps8802.c b/driver/retimer/ps8802.c
deleted file mode 100644
index 9738123ace..0000000000
--- a/driver/retimer/ps8802.c
+++ /dev/null
@@ -1,317 +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.
- *
- * PS8802 retimer.
- */
-
-#include "chipset.h"
-#include "common.h"
-#include "console.h"
-#include "i2c.h"
-#include "ps8802.h"
-#include "timer.h"
-#include "usb_mux.h"
-
-#define PS8802_DEBUG 0
-#define PS8802_I2C_WAKE_DELAY 500
-
-#define CPRINTS(format, args...) cprints(CC_USB, format, ## args)
-#define CPRINTF(format, args...) cprintf(CC_USB, format, ## args)
-
-int ps8802_i2c_read(const struct usb_mux *me, int page, int offset, int *data)
-{
- int rv;
-
- rv = i2c_read8(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, data);
-
- if (PS8802_DEBUG)
- ccprintf("%s(%d:0x%02X, 0x%02X) =>0x%02X\n", __func__,
- me->i2c_port,
- me->i2c_addr_flags + page,
- offset, *data);
-
- return rv;
-}
-
-int ps8802_i2c_write(const struct usb_mux *me, int page, int offset, int data)
-{
- int rv;
- int pre_val, post_val;
-
- if (PS8802_DEBUG)
- i2c_read8(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, &pre_val);
-
- rv = i2c_write8(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, data);
-
- if (PS8802_DEBUG) {
- i2c_read8(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, &post_val);
-
- ccprintf("%s(%d:0x%02X, 0x%02X, 0x%02X) "
- "0x%02X=>0x%02X\n",
- __func__,
- me->i2c_port,
- me->i2c_addr_flags + page,
- offset, data,
- pre_val, post_val);
- }
-
- return rv;
-}
-
-int ps8802_i2c_write16(const struct usb_mux *me, int page, int offset,
- int data)
-{
- int rv;
- int pre_val, post_val;
-
- if (PS8802_DEBUG)
- i2c_read16(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, &pre_val);
-
- rv = i2c_write16(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, data);
-
- if (PS8802_DEBUG) {
- i2c_read16(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, &post_val);
-
- ccprintf("%s(%d:0x%02X, 0x%02X, 0x%04X) "
- "0x%04X=>0x%04X\n",
- __func__,
- me->i2c_port,
- me->i2c_addr_flags + page,
- offset, data,
- pre_val, post_val);
- }
-
- return rv;
-}
-
-int ps8802_i2c_field_update8(const struct usb_mux *me, int page, int offset,
- uint8_t field_mask, uint8_t set_value)
-{
- int rv;
- int pre_val, post_val;
-
- if (PS8802_DEBUG)
- i2c_read8(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, &pre_val);
-
- rv = i2c_field_update8(me->i2c_port,
- me->i2c_addr_flags + page,
- offset,
- field_mask,
- set_value);
-
- if (PS8802_DEBUG) {
- i2c_read8(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, &post_val);
-
- ccprintf("%s(%d:0x%02X, 0x%02X, 0x%02X, 0x%02X) "
- "0x%02X=>0x%02X\n",
- __func__,
- me->i2c_port,
- me->i2c_addr_flags + page,
- offset, field_mask, set_value,
- pre_val, post_val);
- }
-
- return rv;
-}
-
-int ps8802_i2c_field_update16(const struct usb_mux *me, int page, int offset,
- uint16_t field_mask, uint16_t set_value)
-{
- int rv;
- int pre_val, post_val;
-
- if (PS8802_DEBUG)
- i2c_read16(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, &pre_val);
-
- rv = i2c_field_update16(me->i2c_port,
- me->i2c_addr_flags + page,
- offset,
- field_mask,
- set_value);
-
- if (PS8802_DEBUG) {
- i2c_read16(me->i2c_port,
- me->i2c_addr_flags + page,
- offset, &post_val);
-
- ccprintf("%s(%d:0x%02X, 0x%02X, 0x%02X, 0x%04X) "
- "0x%04X=>0x%04X\n",
- __func__,
- me->i2c_port,
- me->i2c_addr_flags + page,
- offset, field_mask, set_value,
- pre_val, post_val);
- }
-
- return rv;
-}
-
-/*
- * If PS8802 is in I2C standby mode, wake it up by reading PS8802_REG_MODE.
- * From Application Note: 1) Activate by reading any Page 2 register. 2) Wait
- * 500 microseconds. 3) After 5 seconds idle, PS8802 will return to standby.
- */
-int ps8802_i2c_wake(const struct usb_mux *me)
-{
- int data;
- int rv = EC_ERROR_UNKNOWN;
-
- /* If in standby, first read will fail, second should succeed. */
- for (int i = 0; i < 2; i++) {
- rv = ps8802_i2c_read(me,
- PS8802_REG_PAGE2,
- PS8802_REG2_MODE,
- &data);
- if (rv == EC_SUCCESS)
- return rv;
-
- usleep(PS8802_I2C_WAKE_DELAY);
- }
-
- return rv;
-}
-
-/*
- * Setting operation mode to standby mode
- */
-static int ps8802_enter_low_power_mode(const struct usb_mux *me)
-{
- int rv;
-
- rv = ps8802_i2c_write(me, PS8802_REG_PAGE2, PS8802_REG2_MODE,
- PS8802_MODE_STANDBY_MODE);
-
- if (rv)
- CPRINTS("C%d: PS8802: Failed to enter low power mode!",
- me->usb_port);
-
- return rv;
-}
-
-static int ps8802_init(const struct usb_mux *me)
-{
- ps8802_enter_low_power_mode(me);
- return EC_SUCCESS;
-}
-
-static int ps8802_set_mux(const struct usb_mux *me, mux_state_t mux_state,
- bool *ack_required)
-{
- int val;
- int rv;
-
- /* This driver does not use host command ACKs */
- *ack_required = false;
-
- if (chipset_in_state(CHIPSET_STATE_HARD_OFF))
- return (mux_state == USB_PD_MUX_NONE) ? EC_SUCCESS
- : EC_ERROR_NOT_POWERED;
-
- /* Make sure the PS8802 is awake */
- rv = ps8802_i2c_wake(me);
- if (rv)
- return rv;
-
- if (PS8802_DEBUG)
- ccprintf("%s(%d, 0x%02X) %s %s %s\n",
- __func__, me->usb_port, mux_state,
- (mux_state & USB_PD_MUX_USB_ENABLED) ? "USB" : "",
- (mux_state & USB_PD_MUX_DP_ENABLED) ? "DP" : "",
- (mux_state & USB_PD_MUX_POLARITY_INVERTED)
- ? "FLIP" : "");
-
- /* Set the mode and flip */
- val = (PS8802_MODE_DP_REG_CONTROL |
- PS8802_MODE_USB_REG_CONTROL |
- PS8802_MODE_FLIP_REG_CONTROL |
- PS8802_MODE_IN_HPD_REG_CONTROL);
-
- if (mux_state & USB_PD_MUX_USB_ENABLED)
- val |= PS8802_MODE_USB_ENABLE;
- if (mux_state & USB_PD_MUX_DP_ENABLED)
- val |= PS8802_MODE_DP_ENABLE | PS8802_MODE_IN_HPD_ENABLE;
- if (mux_state & USB_PD_MUX_POLARITY_INVERTED)
- val |= PS8802_MODE_FLIP_ENABLE;
-
- rv = ps8802_i2c_write(me,
- PS8802_REG_PAGE2,
- PS8802_REG2_MODE,
- val);
-
- return rv;
-}
-
-static int ps8802_get_mux(const struct usb_mux *me, mux_state_t *mux_state)
-{
- int rv;
- int val;
-
- *mux_state = USB_PD_MUX_NONE;
-
- if (chipset_in_state(CHIPSET_STATE_HARD_OFF))
- return EC_ERROR_NOT_POWERED;
-
- rv = ps8802_i2c_wake(me);
- if (rv)
- return rv;
-
- rv = ps8802_i2c_read(me,
- PS8802_REG_PAGE2,
- PS8802_REG2_MODE,
- &val);
- if (rv)
- return rv;
-
- if (val & PS8802_MODE_USB_ENABLE)
- *mux_state |= USB_PD_MUX_USB_ENABLED;
- if (val & PS8802_MODE_DP_ENABLE)
- *mux_state |= USB_PD_MUX_DP_ENABLED;
- if (val & PS8802_MODE_FLIP_ENABLE)
- *mux_state |= USB_PD_MUX_POLARITY_INVERTED;
-
- return rv;
-}
-
-const struct usb_mux_driver ps8802_usb_mux_driver = {
- .init = ps8802_init,
- .set = ps8802_set_mux,
- .get = ps8802_get_mux,
- .enter_low_power_mode = &ps8802_enter_low_power_mode,
-};
-
-/*
- * If PS8802 I2c address was conflicted, change
- * the I2c address in page 0x0A, offset 0xB0
- * switch to 0x50 8-bit address
- */
-int ps8802_chg_i2c_addr(int i2c_port)
-{
- int rv;
-
- rv = i2c_write8(i2c_port,
- PS8802_P1_ADDR, PS8802_ADDR_CFG,
- PS8802_I2C_ADDR_FLAGS_ALT);
-
- return rv;
-}
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