| /* Copyright 2015 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 PS8740 USB port switch driver. |
| */ |
| |
| #ifndef __CROS_EC_PS8740_H |
| #define __CROS_EC_PS8740_H |
| |
| /* Mode register for setting mux */ |
| #define PS8740_REG_MODE 0x00 |
| #define PS8740_MODE_POLARITY_INVERTED (1 << 4) |
| #define PS8740_MODE_USB_ENABLED (1 << 5) |
| #define PS8740_MODE_DP_ENABLED (1 << 6) |
| #define PS8740_MODE_POWER_DOWN (1 << 7) |
| |
| /* Status register for checking mux state */ |
| #define PS8740_REG_STATUS 0x09 |
| #define PS8740_STATUS_POLARITY_INVERTED (1 << 2) |
| #define PS8740_STATUS_USB_ENABLED (1 << 3) |
| #define PS8740_STATUS_DP_ENABLED (1 << 4) |
| #define PS8740_STATUS_HPD_ASSERTED (1 << 7) |
| |
| /* Chip ID / revision registers and expected fused values */ |
| #define PS8740_REG_REVISION_ID1 0xf0 |
| #define PS8740_REVISION_ID1 0x00 |
| #define PS8740_REG_REVISION_ID2 0xf1 |
| #define PS8740_REVISION_ID2 0x0a |
| #define PS8740_REG_CHIP_ID1 0xf2 |
| #define PS8740_CHIP_ID1 0x40 |
| #define PS8740_REG_CHIP_ID2 0xf3 |
| #define PS8740_CHIP_ID2 0x87 |
| |
| /* USB equalization settings for Host to Mux */ |
| #define PS8740_REG_USB_EQ_TX 0x32 |
| #define PS8740_USB_EQ_TX_10_1_DB 0x00 |
| #define PS8740_USB_EQ_TX_14_3_DB 0x20 |
| #define PS8740_USB_EQ_TX_8_5_DB 0x40 |
| #define PS8740_USB_EQ_TX_6_5_DB 0x60 |
| #define PS8740_USB_EQ_TX_11_5_DB 0x80 |
| #define PS8740_USB_EQ_TX_9_5_DB 0xc0 |
| #define PS8740_USB_EQ_TX_7_5_DB 0xe0 |
| #define PS8740_USB_EQ_TERM_100_OHM (0 << 2) |
| #define PS8740_USB_EQ_TERM_85_OHM (1 << 2) |
| |
| /* USB equalization settings for Connector to Mux */ |
| #define PS8740_REG_USB_EQ_RX 0x3b |
| #define PS8740_USB_EQ_RX_4_4_DB 0x00 |
| #define PS8740_USB_EQ_RX_7_0_DB 0x10 |
| #define PS8740_USB_EQ_RX_8_2_DB 0x20 |
| #define PS8740_USB_EQ_RX_9_4_DB 0x30 |
| #define PS8740_USB_EQ_RX_10_2_DB 0x40 |
| #define PS8740_USB_EQ_RX_11_4_DB 0x50 |
| #define PS8740_USB_EQ_RX_14_3_DB 0x60 |
| #define PS8740_USB_EQ_RX_14_8_DB 0x70 |
| #define PS8740_USB_EQ_RX_15_2_DB 0x80 |
| #define PS8740_USB_EQ_RX_15_5_DB 0x90 |
| #define PS8740_USB_EQ_RX_16_2_DB 0xa0 |
| #define PS8740_USB_EQ_RX_17_3_DB 0xb0 |
| #define PS8740_USB_EQ_RX_18_4_DB 0xc0 |
| #define PS8740_USB_EQ_RX_20_1_DB 0xd0 |
| #define PS8740_USB_EQ_RX_21_3_DB 0xe0 |
| |
| int ps8740_tune_usb_eq(int i2c_addr, uint8_t tx, uint8_t rx); |
| |
| #endif /* __CROS_EC_PS8740_H */ |
