diff options
Diffstat (limited to 'driver')
| -rw-r--r-- | driver/build.mk | 1 | ||||
| -rw-r--r-- | driver/pi3usb30532.h | 78 | ||||
| -rw-r--r-- | driver/usb_switch_pi3usb30532.c | 85 |
3 files changed, 164 insertions, 0 deletions
diff --git a/driver/build.mk b/driver/build.mk index f45b293dc7..997726fe24 100644 --- a/driver/build.mk +++ b/driver/build.mk @@ -56,6 +56,7 @@ driver-$(CONFIG_TEMP_SENSOR_TMP432)+=temp_sensor/tmp432.o # USB switches driver-$(CONFIG_USB_SWITCH_PI3USB9281)+=usb_switch_pi3usb9281.o +driver-$(CONFIG_USB_SWITCH_PI3USB30532)+=usb_switch_pi3usb30532.o driver-$(CONFIG_USB_SWITCH_TSU6721)+=usb_switch_tsu6721.o # Firmware Update diff --git a/driver/pi3usb30532.h b/driver/pi3usb30532.h new file mode 100644 index 0000000000..f99c9561bb --- /dev/null +++ b/driver/pi3usb30532.h @@ -0,0 +1,78 @@ +/* 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. + * + * Pericom PI3USB30532 USB port switch driver. + */ + +#ifndef PI3USB30532_H +#define PI3USB30532_H + +#include <inttypes.h> + +/* USB switch registers */ +#define PI3USB30532_REG_ADDR 0x00 +#define PI3USB30532_REG_VENDOR 0x01 +#define PI3USB30532_REG_CONTROL 0x02 +/* Control register field */ +#define PI3USB30532_CTRL_MASK 0x7 +#define PI3USB30532_CTRL_RSVD 0 +/* Switch vendor ID */ +#define PI3USB30532_VENDOR_ID 0 + +/* PI3USB30532 control flags */ +#define PI3USB30532_BIT_SWAP (1 << 0) +#define PI3USB30532_BIT_DP (1 << 1) +#define PI3USB30532_BIT_USB (1 << 2) + +/* PI3USB30532 modes */ +/* Power down, switch open */ +#define PI3USB30532_MODE_POWERDOWN 0 +/* Keep power on, switch open */ +#define PI3USB30532_MODE_POWERON 1 +/* 4-lane DP 1.2 + * dp0~3 : rx2, tx2, tx1, rx1 + * hpd+/-: rfu1, rfu2 + */ +#define PI3USB30532_MODE_DP PI3USB30532_BIT_DP +/* 4-lane DP 1.2 swap + * dp0~3 : rx1, tx1, tx2, rx2 + * hpd+/-: rfu2, rfu1 + */ +#define PI3USB30532_MODE_DP_SWAP (PI3USB30532_MODE_DP | PI3USB30532_BIT_SWAP) +/* USB3 + * tx/rx : tx1, rx1 + */ +#define PI3USB30532_MODE_USB PI3USB30532_BIT_USB +/* USB3 swap + * tx/rx : tx2, rx2 + */ +#define PI3USB30532_MODE_USB_SWAP (PI3USB30532_MODE_USB | PI3USB30532_BIT_SWAP) +/* 2-lane DP 1.2 + USB3 + * tx/rx : tx1, rx1 + * dp0~1 : rx2, tx2 + * hpd+/-: rfu1, rfu2 + */ +#define PI3USB30532_MODE_DP_USB (PI3USB30532_BIT_DP | PI3USB30532_BIT_USB) +/* 2-lane DP 1.2 + USB3, swap + * tx/rx : tx2, rx2 + * dp0-1 : rx1, tx1 + * hpd+/-: rfu2, rfu1 + */ +#define PI3USB30532_MODE_DP_USB_SWAP (PI3USB30532_MODE_DP_USB | \ + PI3USB30532_BIT_SWAP) + + +/* Reads PI3USB30532 register */ +int pi3usb30532_read(uint8_t chip_idx, uint8_t reg); + +/* Writes PI3USB30532 register */ +int pi3usb30532_write(uint8_t chip_idx, uint8_t reg, uint8_t val); + +/* Writes PI3USB30532 control register */ +int pi3usb30532_set_switch(uint8_t chip_idx, uint8_t mode); + +/* Resets PI3USB30532 to power on default value */ +int pi3usb30532_reset(uint8_t chip_idx); + +#endif /* PI3USB30532_H */ diff --git a/driver/usb_switch_pi3usb30532.c b/driver/usb_switch_pi3usb30532.c new file mode 100644 index 0000000000..1688278ae6 --- /dev/null +++ b/driver/usb_switch_pi3usb30532.c @@ -0,0 +1,85 @@ +/* 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. + * + * Pericom PI3USB30532 USB port switch driver. + */ + +#include "common.h" +#include "console.h" +#include "gpio.h" +#include "hooks.h" +#include "i2c.h" +#include "task.h" +#include "timer.h" +#include "pi3usb30532.h" +#include "util.h" + +/* Console output macros */ +#define CPUTS(outstr) cputs(CC_USBCHARGE, outstr) +#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args) + +#define INTERNAL_READ_ERROR(code) (EC_ERROR_INTERNAL_FIRST + code) +#define IS_READ_ERROR(code) ((code) > EC_ERROR_INTERNAL_FIRST) + +/* 8-bit I2C address */ +static const int pi3usb30532_addrs[] = CONFIG_USB_SWITCH_I2C_ADDRS; + +int pi3usb30532_read(uint8_t chip_idx, uint8_t reg) +{ + int res, val; + int addr = pi3usb30532_addrs[chip_idx]; + + res = i2c_read8(I2C_PORT_USB_SWITCH, addr, reg, &val); + if (res) + return INTERNAL_READ_ERROR(res); + + return val; +} + +int pi3usb30532_write(uint8_t chip_idx, uint8_t reg, uint8_t val) +{ + int res; + int addr = pi3usb30532_addrs[chip_idx]; + + res = i2c_write8(I2C_PORT_USB_SWITCH, addr, reg, val); + if (res) + CPUTS("PI3USB30532 I2C write failed"); + + return res; +} + +/* Writes control register to set switch mode */ +int pi3usb30532_set_switch(uint8_t chip_idx, uint8_t mode) +{ + return pi3usb30532_write(chip_idx, PI3USB30532_REG_CONTROL, + (mode & PI3USB30532_CTRL_MASK) | + PI3USB30532_CTRL_RSVD); +} + +int pi3usb30532_reset(uint8_t chip_idx) +{ + return pi3usb30532_set_switch(chip_idx, PI3USB30532_MODE_POWERDOWN); +} + +static void pi3usb30532_init(void) +{ + int i, res, val; + + for (i = 0; i < ARRAY_SIZE(pi3usb30532_addrs); i++) { + res = pi3usb30532_reset(i); + if (res) + CPRINTS("PI3USB30532 [%d] init failed", i); + + val = pi3usb30532_read(i, PI3USB30532_REG_VENDOR); + if (IS_READ_ERROR(val)) { + CPRINTS("PI3USB30532 [%d] read failed", i); + continue; + } + + if (val != PI3USB30532_VENDOR_ID) + CPRINTS("PI3USB30532 [%d] invalid ID 0x%02x", i, val); + + } +} +DECLARE_HOOK(HOOK_INIT, pi3usb30532_init, HOOK_PRIO_LAST); |