usb_mux: Merge PS8743 & PS8740 as PS874X

Merge PS8743 & PS8740 as PS874X as both the drivers are almost same.

BUG=b:64598680
BRANCH=glkrvp
TEST=make buildall -j
     On GLKRVP, verify mux setting is correct with
     Apple dongle (VGA + USB) and Pluggable adapter.

Change-Id: Ic6d31979936ee213b07c4c71859809102ee91452
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/612209
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Shawn N <shawnn@chromium.org>

1 files changed, 113 insertions, 0 deletions

diff --git a/driver/usb_mux_ps874x.h b/driver/usb_mux_ps874x.h
new file mode 100644
index 0000000000..8092e448bb
--- /dev/null
+++ b/driver/usb_mux_ps874x.h
@@ -0,0 +1,113 @@
+/* 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.
+ *
+ * Parade PS874X USB Type-C Redriving Switch for USB Host / DisplayPort.
+ */
+
+#ifndef __CROS_EC_USB_MUX_PS874X_H
+#define __CROS_EC_USB_MUX_PS874X_H
+
+/* Mode register for setting mux */
+#define PS874X_REG_MODE 0x00
+#ifdef CONFIG_USB_MUX_PS8740
+	#define PS874X_MODE_POLARITY_INVERTED (1 << 4)
+	#define PS874X_MODE_USB_ENABLED       (1 << 5)
+	#define PS874X_MODE_DP_ENABLED        (1 << 6)
+	#define PS874X_MODE_POWER_DOWN        (1 << 7)
+#elif defined(CONFIG_USB_MUX_PS8743)
+	#define PS874X_MODE_POLARITY_INVERTED (1 << 2)
+	#define PS874X_MODE_FLIP_PIN_ENABLED  (1 << 3)
+	#define PS874X_MODE_USB_ENABLED       (1 << 4)
+	#define PS874X_MODE_CE_USB_ENABLED    (1 << 5)
+	#define PS874X_MODE_DP_ENABLED        (1 << 6)
+	#define PS874X_MODE_CE_DP_ENABLED     (1 << 7)
+	/* To reset the state machine to default */
+	#define PS874X_MODE_POWER_DOWN (PS874X_MODE_CE_USB_ENABLED |  \
+					PS874X_MODE_CE_DP_ENABLED)
+#endif
+
+/* Status register for checking mux state */
+#define PS874X_REG_STATUS 0x09
+#define PS874X_STATUS_POLARITY_INVERTED (1 << 2)
+#define PS874X_STATUS_USB_ENABLED       (1 << 3)
+#define PS874X_STATUS_DP_ENABLED        (1 << 4)
+#define PS874X_STATUS_HPD_ASSERTED      (1 << 7)
+
+/* Chip ID / revision registers and expected fused values */
+#define PS874X_REG_REVISION_ID1 0xf0
+#define PS874X_REG_REVISION_ID2 0xf1
+#define PS874X_REG_CHIP_ID1     0xf2
+#define PS874X_REG_CHIP_ID2     0xf3
+#ifdef CONFIG_USB_MUX_PS8740
+	#define PS874X_REVISION_ID1 0x00
+	#define PS874X_REVISION_ID2 0x0a
+	#define PS874X_CHIP_ID1     0x40
+#elif defined(CONFIG_USB_MUX_PS8743)
+	#define PS874X_REVISION_ID1 0x01
+	#define PS874X_REVISION_ID2 0x0b
+	#define PS874X_CHIP_ID1     0x41
+#endif
+#define PS874X_CHIP_ID2         0x87
+
+/* USB equalization settings for Host to Mux */
+#define PS874X_REG_USB_EQ_TX     0x32
+#ifdef CONFIG_USB_MUX_PS8740
+	#define PS874X_USB_EQ_TX_10_1_DB 0x00
+	#define PS874X_USB_EQ_TX_14_3_DB 0x20
+	#define PS874X_USB_EQ_TX_8_5_DB  0x40
+	#define PS874X_USB_EQ_TX_6_5_DB  0x60
+	#define PS874X_USB_EQ_TX_11_5_DB 0x80
+	#define PS874X_USB_EQ_TX_9_5_DB  0xc0
+	#define PS874X_USB_EQ_TX_7_5_DB  0xe0
+	#define PS874X_USB_EQ_TERM_100_OHM (0 << 2)
+	#define PS874X_USB_EQ_TERM_85_OHM  (1 << 2)
+#elif defined(CONFIG_USB_MUX_PS8743)
+	#define PS874X_USB_EQ_TX_12_8_DB 0x00
+	#define PS874X_USB_EQ_TX_17_DB   0x20
+	#define PS874X_USB_EQ_TX_7_7_DB  0x40
+	#define PS874X_USB_EQ_TX_3_6_DB  0x60
+	#define PS874X_USB_EQ_TX_15_DB   0x80
+	#define PS874X_USB_EQ_TX_10_9_DB 0xc0
+	#define PS874X_USB_EQ_TX_4_5_DB  0xe0
+#endif
+
+/* USB equalization settings for Connector to Mux */
+#define PS874X_REG_USB_EQ_RX     0x3b
+#ifdef CONFIG_USB_MUX_PS8740
+	#define PS874X_USB_EQ_RX_4_4_DB  0x00
+	#define PS874X_USB_EQ_RX_7_0_DB  0x10
+	#define PS874X_USB_EQ_RX_8_2_DB  0x20
+	#define PS874X_USB_EQ_RX_9_4_DB  0x30
+	#define PS874X_USB_EQ_RX_10_2_DB 0x40
+	#define PS874X_USB_EQ_RX_11_4_DB 0x50
+	#define PS874X_USB_EQ_RX_14_3_DB 0x60
+	#define PS874X_USB_EQ_RX_14_8_DB 0x70
+	#define PS874X_USB_EQ_RX_15_2_DB 0x80
+	#define PS874X_USB_EQ_RX_15_5_DB 0x90
+	#define PS874X_USB_EQ_RX_16_2_DB 0xa0
+	#define PS874X_USB_EQ_RX_17_3_DB 0xb0
+	#define PS874X_USB_EQ_RX_18_4_DB 0xc0
+	#define PS874X_USB_EQ_RX_20_1_DB 0xd0
+	#define PS874X_USB_EQ_RX_21_3_DB 0xe0
+#elif defined(CONFIG_USB_MUX_PS8743)
+	#define PS874X_USB_EQ_RX_2_4_DB  0x00
+	#define PS874X_USB_EQ_RX_5_DB    0x10
+	#define PS874X_USB_EQ_RX_6_5_DB  0x20
+	#define PS874X_USB_EQ_RX_7_4_DB  0x30
+	#define PS874X_USB_EQ_RX_8_7_DB  0x40
+	#define PS874X_USB_EQ_RX_10_9_DB 0x50
+	#define PS874X_USB_EQ_RX_12_8_DB 0x60
+	#define PS874X_USB_EQ_RX_13_8_DB 0x70
+	#define PS874X_USB_EQ_RX_14_8_DB 0x80
+	#define PS874X_USB_EQ_RX_15_4_DB 0x90
+	#define PS874X_USB_EQ_RX_16_0_DB 0xa0
+	#define PS874X_USB_EQ_RX_16_7_DB 0xb0
+	#define PS874X_USB_EQ_RX_18_8_DB 0xc0
+	#define PS874X_USB_EQ_RX_21_3_DB 0xd0
+	#define PS874X_USB_EQ_RX_22_2_DB 0xe0
+#endif
+
+int ps874x_tune_usb_eq(int i2c_addr, uint8_t tx, uint8_t rx);
+
+#endif /* __CROS_EC_USB_MUX_PS874X_H */