[2/2] tps65090: re-factor for coreboot
This does basic re-factoring to fit the driver into coreboot. Change-Id: Id5f8c12a73ec37ddd545d50b3e8e9b3012657db1 Signed-off-by: David Hendricks <dhendrix@chromium.org> Reviewed-on: http://review.coreboot.org/3061 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
David Hendricks
Ronald G. Minnich
parent
6e877ec63e
commit
765ff76d8f
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@ -1,31 +1,48 @@
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/*
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* Copyright (c) 2012 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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* Copyright 2012, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <i2c.h>
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#include <tps65090.h>
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DECLARE_GLOBAL_DATA_PTR;
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#include <delay.h>
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#include <types.h>
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#include <console/console.h>
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#include <device/i2c.h>
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#include "tps65090.h"
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/* TPS65090 register addresses */
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enum {
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REG_CG_CTRL0 = 4,
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REG_CG_STATUS1 = 0xa,
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REG_FET1_CTRL = 0x0f,
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REG_FET2_CTRL,
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REG_FET3_CTRL,
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REG_FET4_CTRL,
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REG_FET5_CTRL,
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REG_FET6_CTRL,
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REG_FET7_CTRL,
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};
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enum {
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@ -42,125 +59,53 @@ enum {
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FET_CTRL_ENFET = 1 << 0, /* Enable FET */
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};
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static struct tps65090_config {
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int bus;
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int addr;
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int old_bus;
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} config;
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/**
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* Write a value to a register
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*
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* @param chip_addr i2c slave addr for max77686
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* @param reg_addr register address to write
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* @param value value to be written
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* @return 0 on success, non-0 on failure
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*/
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static int tps65090_i2c_write(unsigned int reg_addr, unsigned char value)
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static int tps65090_i2c_write(unsigned int bus,
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unsigned int reg_addr, unsigned char value)
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{
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int ret;
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ret = i2c_write(config.addr, reg_addr, 1, &value, 1);
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debug("%s: reg=%#x, value=%#x, ret=%d\n", __func__, reg_addr, value,
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ret);
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ret = i2c_write(bus, TPS65090_I2C_ADDR, reg_addr, 1, &value, 1);
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printk(BIOS_DEBUG, "%s: reg=%#x, value=%#x, ret=%d\n",
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__func__, reg_addr, value, ret);
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return ret;
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}
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/**
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* Read a value from a register
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*
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* @param chip_addr i2c addr for max77686
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* @param reg_addr register address to read
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* @param value address to store the value to be read
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* @return 0 on success, non-0 on failure
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*/
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static int tps65090_i2c_read(unsigned int reg_addr, unsigned char *value)
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static int tps65090_i2c_read(unsigned int bus,
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unsigned int reg_addr, unsigned char *value)
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{
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int ret;
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debug("%s: reg=%#x, ", __func__, reg_addr);
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ret = i2c_read(config.addr, reg_addr, 1, value, 1);
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printk(BIOS_DEBUG, "%s: reg=%#x, ", __func__, reg_addr);
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ret = i2c_read(bus, TPS65090_I2C_ADDR, reg_addr, 1, value, 1);
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if (ret)
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debug("fail, ret=%d\n", ret);
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printk(BIOS_DEBUG, "fail, ret=%d\n", ret);
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else
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debug("value=%#x, ret=%d\n", *value, ret);
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printk(BIOS_DEBUG, "value=%#x, ret=%d\n", *value, ret);
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return ret;
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}
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static int tps65090_select(void)
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{
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int ret;
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config.old_bus = i2c_get_bus_num();
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if (config.old_bus != config.bus) {
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debug("%s: Select bus %d\n", __func__, config.bus);
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ret = i2c_set_bus_num(config.bus);
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if (ret) {
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debug("%s: Cannot select TPS65090, err %d\n",
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__func__, ret);
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return -1;
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}
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}
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return 0;
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}
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static int tps65090_deselect(void)
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{
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int ret;
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if (config.old_bus != i2c_get_bus_num()) {
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ret = i2c_set_bus_num(config.old_bus);
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debug("%s: Select bus %d\n", __func__, config.old_bus);
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if (ret) {
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debug("%s: Cannot restore i2c bus, err %d\n",
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__func__, ret);
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return -1;
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}
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}
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config.old_bus = -1;
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return 0;
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}
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/**
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* Checks for a valid FET number
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*
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* @param fet_id FET number to check
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* @return 0 if ok, -1 if FET value is out of range
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*/
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static int tps65090_check_fet(unsigned int fet_id)
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{
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if (fet_id == 0 || fet_id > MAX_FET_NUM) {
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debug("parameter fet_id is out of range, %u not in 1 ~ %u\n",
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fet_id, MAX_FET_NUM);
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return -1;
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}
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return 0;
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}
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/**
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* Set the power state for a FET
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*
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* @param fet_id Fet number to set (1..MAX_FET_NUM)
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* @param set 1 to power on FET, 0 to power off
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* @fet_id Fet number to set (1..MAX_FET_NUM)
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* @set 1 to power on FET, 0 to power off
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* @return FET_ERR_COMMS if we got a comms error, FET_ERR_NOT_READY if the
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* FET failed to change state. If all is ok, returns 0.
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*/
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static int tps65090_fet_set(int fet_id, int set)
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static int tps65090_fet_set(unsigned int bus, enum fet_id fet_id, int set)
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{
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int retry, value;
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uchar reg;
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uint8_t reg;
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value = FET_CTRL_ADENFET | FET_CTRL_WAIT;
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if (set)
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value |= FET_CTRL_ENFET;
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if (tps65090_i2c_write(REG_FET1_CTRL + fet_id - 1, value))
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if (tps65090_i2c_write(bus, fet_id, value))
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return FET_ERR_COMMS;
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/* Try reading until we get a result */
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for (retry = 0; retry < MAX_CTRL_READ_TRIES; retry++) {
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if (tps65090_i2c_read(REG_FET1_CTRL + fet_id - 1, ®))
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if (tps65090_i2c_read(bus, fet_id, ®))
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return FET_ERR_COMMS;
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/* Check that the fet went into the expected state */
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@ -171,27 +116,25 @@ static int tps65090_fet_set(int fet_id, int set)
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if (reg & FET_CTRL_TOFET)
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break;
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mdelay(1);
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udelay(1000);
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}
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debug("FET %d: Power good should have set to %d but reg=%#02x\n",
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fet_id, set, reg);
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printk(BIOS_DEBUG, "FET %d: Power good should have set to %d but "
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"reg=%#02x\n", fet_id, set, reg);
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return FET_ERR_NOT_READY;
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}
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int tps65090_fet_enable(unsigned int fet_id)
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/* FIXME(dhendrix): add timer API */
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#if 0
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int tps65090_fet_enable(unsigned int bus, enum fet_id fet_id)
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{
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int loops;
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ulong start;
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unsigned long start;
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int ret = 0;
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if (tps65090_check_fet(fet_id))
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return -1;
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if (tps65090_select())
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return -1;
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start = get_timer(0);
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for (loops = 0; ; loops++) {
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ret = tps65090_fet_set(fet_id, 1);
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ret = tps65090_fet_set(bus, fet_id, 1);
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if (!ret)
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break;
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@ -199,16 +142,51 @@ int tps65090_fet_enable(unsigned int fet_id)
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break;
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/* Turn it off and try again until we time out */
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tps65090_fet_set(fet_id, 0);
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tps65090_fet_set(bus, fet_id, 0);
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}
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tps65090_deselect();
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if (ret) {
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debug("%s: FET%d failed to power on: time=%lums, loops=%d\n",
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__func__, fet_id, get_timer(start), loops);
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printk(BIOS_DEBUG, "%s: FET%d failed to power on: time=%lums, "
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"loops=%d\n", __func__, fet_id,
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get_timer(start), loops);
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} else if (loops) {
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debug("%s: FET%d powered on after %lums, loops=%d\n",
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__func__, fet_id, get_timer(start), loops);
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printk(BIOS_DEBUG, "%s: FET%d powered on after %lums, "
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"loops=%d\n", __func__, fet_id,
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get_timer(start), loops);
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}
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/*
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* Unfortunately, there are some conditions where the power
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* good bit will be 0, but the fet still comes up. One such
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* case occurs with the lcd backlight. We'll just return 0 here
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* and assume that the fet will eventually come up.
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*/
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if (ret == FET_ERR_NOT_READY)
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ret = 0;
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return ret;
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}
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#endif
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int tps65090_fet_enable(unsigned int bus, enum fet_id fet_id)
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{
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int loops;
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int ret = 0;
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for (loops = 0; loops < 100; loops++) {
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ret = tps65090_fet_set(bus, fet_id, 1);
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if (!ret)
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break;
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/* Turn it off and try again until we time out */
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tps65090_fet_set(bus, fet_id, 0);
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udelay(1000);
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}
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if (ret) {
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printk(BIOS_DEBUG, "%s: FET%d failed to power on\n",
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__func__, fet_id);
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} else if (loops) {
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printk(BIOS_DEBUG, "%s: FET%d powered on\n",
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__func__, fet_id);
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}
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/*
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* Unfortunately, there are some conditions where the power
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@ -222,136 +200,63 @@ int tps65090_fet_enable(unsigned int fet_id)
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return ret;
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}
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int tps65090_fet_disable(unsigned int fet_id)
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int tps65090_fet_disable(unsigned int bus, enum fet_id fet_id)
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{
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int ret;
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if (tps65090_check_fet(fet_id))
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return -1;
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if (tps65090_select())
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return -1;
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ret = tps65090_fet_set(fet_id, 0);
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tps65090_deselect();
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return ret;
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return tps65090_fet_set(bus, fet_id, 0);
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}
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int tps65090_fet_is_enabled(unsigned int fet_id)
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int tps65090_fet_is_enabled(unsigned int bus, enum fet_id fet_id)
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{
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unsigned char reg;
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int ret;
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if (tps65090_check_fet(fet_id))
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return -1;
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if (tps65090_select())
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return -1;
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ret = tps65090_i2c_read(REG_FET1_CTRL + fet_id - 1, ®);
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tps65090_deselect();
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ret = tps65090_i2c_read(bus, fet_id, ®);
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if (ret) {
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debug("fail to read FET%u_CTRL register over I2C", fet_id);
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printk(BIOS_DEBUG, "fail to read FET%u_CTRL", fet_id);
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return -2;
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}
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return reg & FET_CTRL_ENFET;
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}
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int tps65090_get_charging(void)
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int tps65090_is_charging(unsigned int bus)
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{
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unsigned char val;
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int ret;
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if (tps65090_select())
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return -1;
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ret = tps65090_i2c_read(REG_CG_CTRL0, &val);
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tps65090_deselect();
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ret = tps65090_i2c_read(bus, REG_CG_CTRL0, &val);
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if (ret)
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return ret;
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return val & CG_CTRL0_ENC_MASK ? 1 : 0;
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}
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int tps65090_set_charge_enable(int enable)
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int tps65090_set_charge_enable(unsigned int bus, int enable)
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{
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unsigned char val;
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int ret;
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if (tps65090_select())
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return -1;
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ret = tps65090_i2c_read(REG_CG_CTRL0, &val);
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ret = tps65090_i2c_read(bus, REG_CG_CTRL0, &val);
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if (!ret) {
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if (enable)
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val |= CG_CTRL0_ENC_MASK;
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else
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val &= ~CG_CTRL0_ENC_MASK;
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ret = tps65090_i2c_write(REG_CG_CTRL0, val);
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ret = tps65090_i2c_write(bus, REG_CG_CTRL0, val);
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}
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tps65090_deselect();
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if (ret) {
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debug("%s: Failed to read/write register\n", __func__);
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printk(BIOS_DEBUG, "%s: Failed to enable\n", __func__);
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return ret;
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}
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return 0;
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}
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int tps65090_get_status(void)
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int tps65090_get_status(unsigned int bus)
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{
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unsigned char val;
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int ret;
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if (tps65090_select())
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return -1;
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ret = tps65090_i2c_read(REG_CG_STATUS1, &val);
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tps65090_deselect();
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ret = tps65090_i2c_read(bus, REG_CG_STATUS1, &val);
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if (ret)
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return ret;
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return val;
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}
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static int tps65090_decode_config(struct tps65090_config *config)
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{
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#ifdef CONFIG_OF_CONTROL
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const void *blob = gd->fdt_blob;
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int node, parent;
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int i2c_bus;
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node = fdtdec_next_compatible(blob, 0, COMPAT_TI_TPS65090);
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if (node < 0) {
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debug("%s: Node not found\n", __func__);
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return -1;
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}
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parent = fdt_parent_offset(blob, node);
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if (parent < 0) {
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debug("%s: Cannot find node parent\n", __func__);
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return -1;
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}
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i2c_bus = i2c_get_bus_num_fdt(blob, parent);
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if (i2c_bus < 0)
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return -1;
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config->bus = i2c_bus;
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config->addr = fdtdec_get_addr(blob, node, "reg");
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#else
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config->bus = CONFIG_TPS65090_I2C_BUS;
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config->addr = TPS65090_I2C_ADDR;
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#endif
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return 0;
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}
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int tps65090_init(void)
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{
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int ret;
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if (tps65090_decode_config(&config))
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return -1;
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config.old_bus = -1;
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if (tps65090_select())
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return -1;
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/* Probe the chip */
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ret = i2c_probe(config.addr);
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if (ret)
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debug("%s: failed to probe TPS65090 over I2C, returned %d\n",
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__func__, ret);
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return ret;
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}
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@ -1,7 +1,32 @@
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/*
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* Copyright (c) 2012 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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* Copyright 2012, Google Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are
|
||||
* met:
|
||||
*
|
||||
* * Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* * Redistributions in binary form must reproduce the above
|
||||
* copyright notice, this list of conditions and the following
|
||||
* disclaimer in the documentation and/or other materials provided
|
||||
* with the distribution.
|
||||
* * Neither the name of Google Inc. nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* Alternatively, this software may be distributed under the terms of the
|
||||
* GNU General Public License ("GPL") version 2 as published by the Free
|
||||
|
|
@ -14,6 +39,17 @@
|
|||
/* I2C device address for TPS65090 PMU */
|
||||
#define TPS65090_I2C_ADDR 0x48
|
||||
|
||||
/* TPS65090 FET control registers */
|
||||
enum fet_id {
|
||||
FET1_CTRL = 0x0f,
|
||||
FET2_CTRL,
|
||||
FET3_CTRL,
|
||||
FET4_CTRL,
|
||||
FET5_CTRL,
|
||||
FET6_CTRL,
|
||||
FET7_CTRL,
|
||||
};
|
||||
|
||||
enum {
|
||||
/* Status register fields */
|
||||
TPS65090_ST1_OTC = 1 << 0,
|
||||
|
|
@ -31,53 +67,52 @@ enum {
|
|||
/**
|
||||
* Enable FET
|
||||
*
|
||||
* @param fet_id FET ID, value between 1 and 7
|
||||
* @return 0 on success, non-0 on failure
|
||||
* @bus I2C bus number the TPS65090 is on
|
||||
* @fet_id FET ID, value between 1 and 7
|
||||
* return 0 on success, non-0 on failure
|
||||
*/
|
||||
int tps65090_fet_enable(unsigned int fet_id);
|
||||
int tps65090_fet_enable(unsigned int bus, enum fet_id fet_id);
|
||||
|
||||
/**
|
||||
* Disable FET
|
||||
*
|
||||
* @param fet_id FET ID, value between 1 and 7
|
||||
* @bus I2C bus number the TPS65090 is on
|
||||
* @fet_id FET ID, value between 1 and 7
|
||||
* @return 0 on success, non-0 on failure
|
||||
*/
|
||||
int tps65090_fet_disable(unsigned int fet_id);
|
||||
int tps65090_fet_disable(unsigned int bus, enum fet_id fet_id);
|
||||
|
||||
/**
|
||||
* Is FET enabled?
|
||||
*
|
||||
* @param fet_id FET ID, value between 1 and 7
|
||||
* @bus I2C bus number the TPS65090 is on
|
||||
* @fet_id FET ID, value between 1 and 7
|
||||
* @return 1 enabled, 0 disabled, negative value on failure
|
||||
*/
|
||||
int tps65090_fet_is_enabled(unsigned int fet_id);
|
||||
int tps65090_fet_is_enabled(unsigned int bus, enum fet_id fet_id);
|
||||
|
||||
/**
|
||||
* Enable / disable the battery charger
|
||||
*
|
||||
* @param enable 0 to disable charging, non-zero to enable
|
||||
* @bus I2C bus number the TPS65090 is on
|
||||
* @enable 0 to disable charging, non-zero to enable
|
||||
*/
|
||||
int tps65090_set_charge_enable(int enable);
|
||||
int tps65090_set_charge_enable(unsigned int bus, int enable);
|
||||
|
||||
/**
|
||||
* Check whether we have enabled battery charging
|
||||
*
|
||||
* @bus I2C bus number the TPS65090 is on
|
||||
* @return 1 if enabled, 0 if disabled
|
||||
*/
|
||||
int tps65090_get_charging(void);
|
||||
int tps65090_is_charging(unsigned int bus);
|
||||
|
||||
/**
|
||||
* Return the value of the status register
|
||||
*
|
||||
* @bus I2C bus number the TPS65090 is on
|
||||
* @return status register value, or -1 on error
|
||||
*/
|
||||
int tps65090_get_status(void);
|
||||
|
||||
/**
|
||||
* Initialize the TPS65090 PMU.
|
||||
*
|
||||
* @return 0 on success, non-0 on failure
|
||||
*/
|
||||
int tps65090_init(void);
|
||||
int tps65090_get_status(unsigned int bus);
|
||||
|
||||
#endif /* __TPS65090_H_ */
|
||||
|
|
|
|||
Loading…
Reference in New Issue