diff options
Diffstat (limited to 'driver/usb_mux/ps8822.c')
| -rw-r--r-- | driver/usb_mux/ps8822.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/driver/usb_mux/ps8822.c b/driver/usb_mux/ps8822.c deleted file mode 100644 index 7f25db37f4..0000000000 --- a/driver/usb_mux/ps8822.c +++ /dev/null @@ -1,134 +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. - * - * Parade PS8822 - * USB Type-C Redriving Switch for USB Host / DisplayPort. - */ - -#include "common.h" -#include "i2c.h" -#include "ps8822.h" -#include "usb_mux.h" -#include "util.h" - -static int ps8822_read(const struct usb_mux *me, int page, uint8_t reg, - int *val) -{ - return i2c_read8(me->i2c_port, me->i2c_addr_flags + page, - reg, val); -} - -static int ps8822_write(const struct usb_mux *me, int page, uint8_t reg, - int val) -{ - return i2c_write8(me->i2c_port, me->i2c_addr_flags + page, - reg, val); -} - -int ps8822_set_dp_rx_eq(const struct usb_mux *me, int db) -{ - int dpeq_reg; - int rv; - - /* Read DP EQ register */ - rv = ps8822_read(me, PS8822_REG_PAGE1, PS8822_REG_DP_EQ, - &dpeq_reg); - if (rv) - return rv; - - if (db < PS8822_DPEQ_LEVEL_UP_9DB || db > PS8822_DPEQ_LEVEL_UP_21DB) - return EC_ERROR_INVAL; - - /* Disable auto eq */ - dpeq_reg &= ~PS8822_DP_EQ_AUTO_EN; - - /* Set gain to the requested value */ - dpeq_reg &= ~(PS8822_DPEQ_LEVEL_UP_MASK << - PS8822_REG_DP_EQ_SHIFT); - dpeq_reg |= (db << PS8822_REG_DP_EQ_SHIFT); - - /* Apply new EQ setting */ - return ps8822_write(me, PS8822_REG_PAGE1, PS8822_REG_DP_EQ, - dpeq_reg); -} - -static int ps8822_init(const struct usb_mux *me) -{ - char id[PS8822_ID_LEN + 1]; - int reg; - int i; - int rv = 0; - - /* Read ID registers */ - for (i = 0; i < PS8822_ID_LEN; i++) { - rv |= ps8822_read(me, PS8822_REG_PAGE0, PS8822_REG_DEV_ID1 + i, - ®); - if (!rv) - id[i] = reg; - } - - if (!rv) { - id[PS8822_ID_LEN] = '\0'; - /* Set mode register to default value */ - rv = ps8822_write(me, PS8822_REG_PAGE0, PS8822_REG_MODE, 0); - rv |= strcasecmp("PS8822", id); - } - - return rv; -} - -/* Writes control register to set switch mode */ -static int ps8822_set_mux(const struct usb_mux *me, mux_state_t mux_state, - bool *ack_required) -{ - int reg; - int rv; - - /* This driver does not use host command ACKs */ - *ack_required = false; - - rv = ps8822_read(me, PS8822_REG_PAGE0, PS8822_REG_MODE, ®); - if (rv) - return rv; - - /* Assume standby, preserve PIN_E config bit */ - reg &= ~(PS8822_MODE_ALT_DP_EN | PS8822_MODE_USB_EN | PS8822_MODE_FLIP); - - if (mux_state & USB_PD_MUX_USB_ENABLED) - reg |= PS8822_MODE_USB_EN; - if (mux_state & USB_PD_MUX_DP_ENABLED) - reg |= PS8822_MODE_ALT_DP_EN; - if (mux_state & USB_PD_MUX_POLARITY_INVERTED) - reg |= PS8822_MODE_FLIP; - - return ps8822_write(me, PS8822_REG_PAGE0, PS8822_REG_MODE, reg); -} - -/* Reads control register and updates mux_state accordingly */ -static int ps8822_get_mux(const struct usb_mux *me, mux_state_t *mux_state) -{ - int reg; - int res; - - res = ps8822_read(me, PS8822_REG_PAGE0, PS8822_REG_MODE, ®); - if (res) - return res; - - *mux_state = 0; - if (reg & PS8822_MODE_USB_EN) - *mux_state |= USB_PD_MUX_USB_ENABLED; - if (reg & PS8822_MODE_ALT_DP_EN) - *mux_state |= USB_PD_MUX_DP_ENABLED; - if (reg & PS8822_MODE_FLIP) - *mux_state |= USB_PD_MUX_POLARITY_INVERTED; - - return EC_SUCCESS; -} - - -const struct usb_mux_driver ps8822_usb_mux_driver = { - .init = ps8822_init, - .set = ps8822_set_mux, - .get = ps8822_get_mux, -}; |