pi3usb9281: Implement driver for Pericom USB switch

BRANCH=none
BUG=none
TEST=verify that usb switch funcitons

Change-Id: Ie897a2ae94042abefbb349d30dfa183caaec9ed0
Signed-off-by: Dominic Chen <ddchen@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/209846
Reviewed-by: Vic Yang <victoryang@chromium.org>

1 files changed, 86 insertions, 0 deletions

diff --git a/driver/pi3usb9281.h b/driver/pi3usb9281.h
new file mode 100644
index 0000000000..ebcd333d80
--- /dev/null
+++ b/driver/pi3usb9281.h
@@ -0,0 +1,86 @@
+/* Copyright (c) 2014 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.
+ *
+ * Pericom PI3USB9281 USB port switch.
+ */
+
+#ifndef PI3USB9281_H
+#define PI3USB9281_H
+
+#define PI3USB9281_REG_DEV_ID       0x01
+#define PI3USB9281_REG_CONTROL      0x02
+#define PI3USB9281_REG_INT          0x03
+#define PI3USB9281_REG_INT_MASK     0x05
+#define PI3USB9281_REG_DEV_TYPE     0x0a
+#define PI3USB9281_REG_CHG_STATUS   0x0e
+#define PI3USB9281_REG_MANUAL       0x13
+#define PI3USB9281_REG_RESET        0x1b
+#define PI3USB9281_REG_VBUS         0x1d
+
+#define PI3USB9281_CTRL_INT_MASK    (1 << 0)
+#define PI3USB9281_CTRL_AUTO        (1 << 2)
+#define PI3USB9281_CTRL_SWITCH_AUTO (1 << 4)
+
+#define PI3USB9281_PIN_MANUAL_VBUS  (3 << 0)
+#define PI3USB9281_PIN_MANUAL_DP    (1 << 2)
+#define PI3USB9281_PIN_MANUAL_DM    (1 << 5)
+
+#define PI3USB9281_INT_ATTACH       (1 << 0)
+#define PI3USB9281_INT_DETACH       (1 << 1)
+#define PI3USB9281_INT_OVP          (1 << 5)
+#define PI3USB9281_INT_OCP          (1 << 6)
+#define PI3USB9281_INT_OVP_OC       (1 << 7)
+
+#define PI3USB9281_TYPE_NONE        0
+#define PI3USB9281_TYPE_MHL         (1 << 0)
+#define PI3USB9281_TYPE_OTG         (1 << 1)
+#define PI3USB9281_TYPE_SDP         (1 << 2)
+#define PI3USB9281_TYPE_CAR         (1 << 4)
+#define PI3USB9281_TYPE_CDP         (1 << 5)
+#define PI3USB9281_TYPE_DCP         (1 << 6)
+
+#define PI3USB9281_CHG_NONE         0
+#define PI3USB9281_CHG_CAR_TYPE1    (1 << 1)
+#define PI3USB9281_CHG_CAR_TYPE2    (3 << 0)
+#define PI3USB9281_CHG_APPLE_1A     (1 << 2)
+#define PI3USB9281_CHG_APPLE_2A     (1 << 3)
+#define PI3USB9281_CHG_APPLE_2_4A   (1 << 4)
+
+/* Read PI3USB9281 register. */
+uint8_t pi3usb9281_read(uint8_t chip_idx, uint8_t reg);
+
+/* Write PI3USB9281 register. */
+int pi3usb9281_write(uint8_t chip_idx, uint8_t reg, uint8_t val);
+
+/* Enable interrupts. */
+int pi3usb9281_enable_interrupts(uint8_t chip_idx);
+
+/* Disable all interrupts. */
+int pi3usb9281_disable_interrupts(uint8_t chip_idx);
+
+/* Set interrupt mask. */
+int pi3usb9281_set_interrupt_mask(uint8_t chip_idx, uint8_t mask);
+
+/* Get and clear current interrupt status. */
+int pi3usb9281_get_interrupts(uint8_t chip_idx);
+
+/* Get but keep interrupt status. */
+int pi3usb9281_peek_interrupts(uint8_t chip_idx);
+
+/* Get attached device type. */
+int pi3usb9281_get_device_type(uint8_t chip_idx);
+
+/* Get attached charger status. */
+int pi3usb9281_get_charger_status(uint8_t chip_idx);
+
+/* Set switch configuration to manual. */
+int pi3usb9281_set_switch_manual(uint8_t chip_idx, int val);
+
+/* Set bits to enable pins in manual switch register */
+int pi3usb9281_set_pins(uint8_t chip_idx, uint8_t mask);
+
+/* Reset PI3USB9281. */
+int pi3usb9281_reset(uint8_t chip_idx);
+
+#endif /* PI3USB9281_H */