mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-28 02:35:28 +00:00
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>
This commit is contained in:
Dominic Chen
committed by
chrome-internal-fetch
chrome-internal-fetch
parent
283fe98939
commit
fe1981a414
@@ -44,4 +44,5 @@ driver-$(CONFIG_TEMP_SENSOR_TMP006)+=temp_sensor/tmp006.o
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driver-$(CONFIG_TEMP_SENSOR_TMP432)+=temp_sensor/tmp432.o
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# USB switches
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driver-$(CONFIG_USB_SWITCH_PI3USB9281)+=usb_switch_pi3usb9281.o
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driver-$(CONFIG_USB_SWITCH_TSU6721)+=usb_switch_tsu6721.o
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86
driver/pi3usb9281.h
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86
driver/pi3usb9281.h
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@@ -0,0 +1,86 @@
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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Pericom PI3USB9281 USB port switch.
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*/
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#ifndef PI3USB9281_H
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#define PI3USB9281_H
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#define PI3USB9281_REG_DEV_ID 0x01
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#define PI3USB9281_REG_CONTROL 0x02
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#define PI3USB9281_REG_INT 0x03
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#define PI3USB9281_REG_INT_MASK 0x05
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#define PI3USB9281_REG_DEV_TYPE 0x0a
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#define PI3USB9281_REG_CHG_STATUS 0x0e
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#define PI3USB9281_REG_MANUAL 0x13
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#define PI3USB9281_REG_RESET 0x1b
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#define PI3USB9281_REG_VBUS 0x1d
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#define PI3USB9281_CTRL_INT_MASK (1 << 0)
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#define PI3USB9281_CTRL_AUTO (1 << 2)
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#define PI3USB9281_CTRL_SWITCH_AUTO (1 << 4)
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#define PI3USB9281_PIN_MANUAL_VBUS (3 << 0)
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#define PI3USB9281_PIN_MANUAL_DP (1 << 2)
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#define PI3USB9281_PIN_MANUAL_DM (1 << 5)
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#define PI3USB9281_INT_ATTACH (1 << 0)
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#define PI3USB9281_INT_DETACH (1 << 1)
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#define PI3USB9281_INT_OVP (1 << 5)
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#define PI3USB9281_INT_OCP (1 << 6)
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#define PI3USB9281_INT_OVP_OC (1 << 7)
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#define PI3USB9281_TYPE_NONE 0
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#define PI3USB9281_TYPE_MHL (1 << 0)
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#define PI3USB9281_TYPE_OTG (1 << 1)
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#define PI3USB9281_TYPE_SDP (1 << 2)
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#define PI3USB9281_TYPE_CAR (1 << 4)
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#define PI3USB9281_TYPE_CDP (1 << 5)
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#define PI3USB9281_TYPE_DCP (1 << 6)
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#define PI3USB9281_CHG_NONE 0
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#define PI3USB9281_CHG_CAR_TYPE1 (1 << 1)
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#define PI3USB9281_CHG_CAR_TYPE2 (3 << 0)
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#define PI3USB9281_CHG_APPLE_1A (1 << 2)
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#define PI3USB9281_CHG_APPLE_2A (1 << 3)
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#define PI3USB9281_CHG_APPLE_2_4A (1 << 4)
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/* Read PI3USB9281 register. */
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uint8_t pi3usb9281_read(uint8_t chip_idx, uint8_t reg);
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/* Write PI3USB9281 register. */
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int pi3usb9281_write(uint8_t chip_idx, uint8_t reg, uint8_t val);
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/* Enable interrupts. */
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int pi3usb9281_enable_interrupts(uint8_t chip_idx);
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/* Disable all interrupts. */
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int pi3usb9281_disable_interrupts(uint8_t chip_idx);
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/* Set interrupt mask. */
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int pi3usb9281_set_interrupt_mask(uint8_t chip_idx, uint8_t mask);
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/* Get and clear current interrupt status. */
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int pi3usb9281_get_interrupts(uint8_t chip_idx);
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/* Get but keep interrupt status. */
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int pi3usb9281_peek_interrupts(uint8_t chip_idx);
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/* Get attached device type. */
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int pi3usb9281_get_device_type(uint8_t chip_idx);
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/* Get attached charger status. */
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int pi3usb9281_get_charger_status(uint8_t chip_idx);
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/* Set switch configuration to manual. */
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int pi3usb9281_set_switch_manual(uint8_t chip_idx, int val);
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/* Set bits to enable pins in manual switch register */
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int pi3usb9281_set_pins(uint8_t chip_idx, uint8_t mask);
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/* Reset PI3USB9281. */
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int pi3usb9281_reset(uint8_t chip_idx);
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#endif /* PI3USB9281_H */
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178
driver/usb_switch_pi3usb9281.c
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178
driver/usb_switch_pi3usb9281.c
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@@ -0,0 +1,178 @@
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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Pericom PI3USB3281 USB port switch driver.
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*/
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#include "console.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "i2c.h"
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#include "timer.h"
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#include "pi3usb9281.h"
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#include "util.h"
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/* Console output macros */
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#define CPUTS(outstr) cputs(CC_USBCHARGE, outstr)
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#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
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/* 8-bit I2C address */
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#define PI3USB9281_I2C_ADDR (0x25 << 1)
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/* Delay values */
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#define PI3USB9281_SW_RESET_DELAY 20
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#ifdef CONFIG_USB_SWITCH_PI3USB9281_MUX_GPIO
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#define PI3USB9281_COUNT 2
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static inline void select_chip(uint8_t chip_idx)
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{
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gpio_set_level(CONFIG_USB_SWITCH_PI3USB9281_MUX_GPIO, chip_idx);
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}
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#else
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#define PI3USB9281_COUNT 1
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#define select_chip(x)
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#endif
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static int saved_interrupts[PI3USB9281_COUNT];
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uint8_t pi3usb9281_read(uint8_t chip_idx, uint8_t reg)
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{
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int res, val;
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select_chip(chip_idx);
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res = i2c_read8(I2C_PORT_MASTER, PI3USB9281_I2C_ADDR, reg, &val);
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if (res)
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return 0xee;
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return val;
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}
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int pi3usb9281_write(uint8_t chip_idx, uint8_t reg, uint8_t val)
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{
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int res;
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select_chip(chip_idx);
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res = i2c_write8(I2C_PORT_MASTER, PI3USB9281_I2C_ADDR, reg, val);
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if (res)
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CPRINTS("PI3USB9281 I2C write failed");
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return res;
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}
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int pi3usb9281_enable_interrupts(uint8_t chip_idx)
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{
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int ctrl = pi3usb9281_read(chip_idx, PI3USB9281_REG_CONTROL);
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if (ctrl == 0xee)
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return EC_ERROR_UNKNOWN;
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return pi3usb9281_write(chip_idx, PI3USB9281_REG_CONTROL, ctrl & 0x14);
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}
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int pi3usb9281_disable_interrupts(uint8_t chip_idx)
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{
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int ctrl = pi3usb9281_read(chip_idx, PI3USB9281_REG_CONTROL);
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int rv;
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if (ctrl == 0xee)
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return EC_ERROR_UNKNOWN;
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rv = pi3usb9281_write(chip_idx, PI3USB9281_REG_CONTROL,
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(ctrl | PI3USB9281_CTRL_INT_MASK) & 0x15);
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pi3usb9281_get_interrupts(chip_idx);
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return rv;
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}
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int pi3usb9281_set_interrupt_mask(uint8_t chip_idx, uint8_t mask)
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{
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return pi3usb9281_write(chip_idx, PI3USB9281_REG_INT_MASK, ~mask);
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}
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int pi3usb9281_get_interrupts(uint8_t chip_idx)
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{
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int ret = pi3usb9281_peek_interrupts(chip_idx);
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if (chip_idx >= PI3USB9281_COUNT)
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return EC_ERROR_PARAM1;
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saved_interrupts[chip_idx] = 0;
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return ret;
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}
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int pi3usb9281_peek_interrupts(uint8_t chip_idx)
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{
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if (chip_idx >= PI3USB9281_COUNT)
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return EC_ERROR_PARAM1;
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saved_interrupts[chip_idx] |= pi3usb9281_read(chip_idx,
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PI3USB9281_REG_INT);
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return saved_interrupts[chip_idx];
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}
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int pi3usb9281_get_device_type(uint8_t chip_idx)
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{
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return pi3usb9281_read(chip_idx, PI3USB9281_REG_DEV_TYPE) & 0x77;
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}
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int pi3usb9281_get_charger_status(uint8_t chip_idx)
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{
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return pi3usb9281_read(chip_idx, PI3USB9281_REG_CHG_STATUS) & 0x1f;
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}
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int pi3usb9281_get_vbus(uint8_t chip_idx)
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{
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int vbus = pi3usb9281_read(chip_idx, PI3USB9281_REG_VBUS);
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if (vbus == 0xee)
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return EC_ERROR_UNKNOWN;
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return !!(vbus & 0x2);
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}
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int pi3usb9281_reset(uint8_t chip_idx)
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{
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int rv = pi3usb9281_write(chip_idx, PI3USB9281_REG_RESET, 0x1);
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if (!rv)
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/* Reset takes ~15ms. Wait for 20ms to be safe. */
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msleep(PI3USB9281_SW_RESET_DELAY);
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return rv;
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}
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int pi3usb9281_set_switch_manual(uint8_t chip_idx, int val)
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{
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int ctrl;
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int rv;
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ctrl = pi3usb9281_read(chip_idx, PI3USB9281_REG_CONTROL);
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if (ctrl == 0xee)
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return EC_ERROR_UNKNOWN;
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if (val)
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rv = pi3usb9281_write(chip_idx, PI3USB9281_REG_CONTROL,
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ctrl & ~PI3USB9281_CTRL_AUTO);
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else
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rv = pi3usb9281_write(chip_idx, PI3USB9281_REG_CONTROL,
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ctrl | PI3USB9281_CTRL_AUTO);
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return rv;
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}
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int pi3usb9281_set_pins(uint8_t chip_idx, uint8_t val)
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{
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return pi3usb9281_write(chip_idx, PI3USB9281_REG_MANUAL, val);
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}
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static void pi3usb9281_init(void)
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{
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uint8_t dev_id;
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int i;
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for (i = 0; i < PI3USB9281_COUNT; i++) {
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dev_id = pi3usb9281_read(i, PI3USB9281_REG_DEV_ID);
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if (dev_id != 0x10)
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CPRINTS("PI3USB9281[%d] invalid ID 0x%02x", i, dev_id);
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}
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}
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DECLARE_HOOK(HOOK_INIT, pi3usb9281_init, HOOK_PRIO_LAST);
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@@ -968,6 +968,12 @@
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/* Support the TSU6721 I2C smart switch */
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#undef CONFIG_USB_SWITCH_TSU6721
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/* Support the Pericom PI3USB9281 I2C USB switch */
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#undef CONFIG_USB_SWITCH_PI3USB9281
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/* Select GPIO MUX for Pericom PI3USB9281 I2C USB switch */
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#undef CONFIG_USB_SWITCH_PI3USB9281_MUX_GPIO
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/*****************************************************************************/
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/* Support computing hash of code for verified boot */
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