David Hendricks (dhendrix@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3060
-gerrit
commit de318cc8a47ced7bf974604af07b8b96d2199ac8 Author: David Hendricks dhendrix@chromium.org Date: Tue Apr 9 16:58:02 2013 -0700
[1/2] initial import of TI TPS65090
This imports TPS65090 PMIC from u-boot and adds/updates Makefiles and Kconfig files. The follow-up patch will re-factor the code.
Change-Id: Ic9e43b9665ddf7f55feae8fa17fbf3d2d5f4756d Signed-off-by: David Hendricks dhendrix@chromium.org --- src/drivers/Kconfig | 1 + src/drivers/Makefile.inc | 1 + src/drivers/ti/Kconfig | 20 ++ src/drivers/ti/Makefile.inc | 20 ++ src/drivers/ti/tps65090/Kconfig | 24 +++ src/drivers/ti/tps65090/Makefile.inc | 20 ++ src/drivers/ti/tps65090/tps65090.c | 357 +++++++++++++++++++++++++++++++++++ src/drivers/ti/tps65090/tps65090.h | 83 ++++++++ 8 files changed, 526 insertions(+)
diff --git a/src/drivers/Kconfig b/src/drivers/Kconfig index 315d291..386508a 100644 --- a/src/drivers/Kconfig +++ b/src/drivers/Kconfig @@ -33,4 +33,5 @@ endif source src/drivers/realtek/Kconfig source src/drivers/sil/Kconfig source src/drivers/spi/Kconfig +source src/drivers/ti/Kconfig source src/drivers/trident/Kconfig diff --git a/src/drivers/Makefile.inc b/src/drivers/Makefile.inc index 16d6001..f4fe146 100644 --- a/src/drivers/Makefile.inc +++ b/src/drivers/Makefile.inc @@ -29,6 +29,7 @@ subdirs-y += sil subdirs-y += trident subdirs-y += ics subdirs-y += spi +subdirs-y += ti subdirs-y += ipmi subdirs-y += elog subdirs-$(CONFIG_ARCH_X86) += pc80 diff --git a/src/drivers/ti/Kconfig b/src/drivers/ti/Kconfig new file mode 100644 index 0000000..b3aded8 --- /dev/null +++ b/src/drivers/ti/Kconfig @@ -0,0 +1,20 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2012 The Chromium OS Authors. +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; version 2 of the License. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +source src/drivers/ti/tps65090/Kconfig diff --git a/src/drivers/ti/Makefile.inc b/src/drivers/ti/Makefile.inc new file mode 100644 index 0000000..c0ed9c0 --- /dev/null +++ b/src/drivers/ti/Makefile.inc @@ -0,0 +1,20 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2012 The Chromium OS Authors. +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; version 2 of the License. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +subdirs-$(CONFIG_DRIVER_TI_TPS65090) += tps65090/ diff --git a/src/drivers/ti/tps65090/Kconfig b/src/drivers/ti/tps65090/Kconfig new file mode 100644 index 0000000..feae160 --- /dev/null +++ b/src/drivers/ti/tps65090/Kconfig @@ -0,0 +1,24 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2012 The ChromiumOS Authors +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; version 2 of the License. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +config DRIVER_TI_TPS65090 + bool + default n + help + TI TPS65090 diff --git a/src/drivers/ti/tps65090/Makefile.inc b/src/drivers/ti/tps65090/Makefile.inc new file mode 100644 index 0000000..10b4dd9 --- /dev/null +++ b/src/drivers/ti/tps65090/Makefile.inc @@ -0,0 +1,20 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2012 The ChromiumOS Authors +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; version 2 of the License. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +ramstage-$(CONFIG_DRIVER_TI_TPS65090) += tps65090.c diff --git a/src/drivers/ti/tps65090/tps65090.c b/src/drivers/ti/tps65090/tps65090.c new file mode 100644 index 0000000..60b8ec8 --- /dev/null +++ b/src/drivers/ti/tps65090/tps65090.c @@ -0,0 +1,357 @@ +/* + * Copyright (c) 2012 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. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + */ + +#include <common.h> +#include <fdtdec.h> +#include <i2c.h> +#include <tps65090.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* TPS65090 register addresses */ +enum { + REG_CG_CTRL0 = 4, + REG_CG_STATUS1 = 0xa, + REG_FET1_CTRL = 0x0f, + REG_FET2_CTRL, + REG_FET3_CTRL, + REG_FET4_CTRL, + REG_FET5_CTRL, + REG_FET6_CTRL, + REG_FET7_CTRL, +}; + +enum { + CG_CTRL0_ENC_MASK = 0x01, + + MAX_FET_NUM = 7, + MAX_CTRL_READ_TRIES = 5, + + /* TPS65090 FET_CTRL register values */ + FET_CTRL_TOFET = 1 << 7, /* Timeout, startup, overload */ + FET_CTRL_PGFET = 1 << 4, /* Power good for FET status */ + FET_CTRL_WAIT = 3 << 2, /* Overcurrent timeout max */ + FET_CTRL_ADENFET = 1 << 1, /* Enable output auto discharge */ + FET_CTRL_ENFET = 1 << 0, /* Enable FET */ +}; + +static struct tps65090_config { + int bus; + int addr; + int old_bus; +} config; + +/** + * Write a value to a register + * + * @param chip_addr i2c slave addr for max77686 + * @param reg_addr register address to write + * @param value value to be written + * @return 0 on success, non-0 on failure + */ +static int tps65090_i2c_write(unsigned int reg_addr, unsigned char value) +{ + int ret; + + ret = i2c_write(config.addr, reg_addr, 1, &value, 1); + debug("%s: reg=%#x, value=%#x, ret=%d\n", __func__, reg_addr, value, + ret); + return ret; +} + +/** + * Read a value from a register + * + * @param chip_addr i2c addr for max77686 + * @param reg_addr register address to read + * @param value address to store the value to be read + * @return 0 on success, non-0 on failure + */ +static int tps65090_i2c_read(unsigned int reg_addr, unsigned char *value) +{ + int ret; + + debug("%s: reg=%#x, ", __func__, reg_addr); + ret = i2c_read(config.addr, reg_addr, 1, value, 1); + if (ret) + debug("fail, ret=%d\n", ret); + else + debug("value=%#x, ret=%d\n", *value, ret); + return ret; +} + +static int tps65090_select(void) +{ + int ret; + + config.old_bus = i2c_get_bus_num(); + if (config.old_bus != config.bus) { + debug("%s: Select bus %d\n", __func__, config.bus); + ret = i2c_set_bus_num(config.bus); + if (ret) { + debug("%s: Cannot select TPS65090, err %d\n", + __func__, ret); + return -1; + } + } + + return 0; +} + +static int tps65090_deselect(void) +{ + int ret; + + if (config.old_bus != i2c_get_bus_num()) { + ret = i2c_set_bus_num(config.old_bus); + debug("%s: Select bus %d\n", __func__, config.old_bus); + if (ret) { + debug("%s: Cannot restore i2c bus, err %d\n", + __func__, ret); + return -1; + } + } + config.old_bus = -1; + return 0; +} + +/** + * Checks for a valid FET number + * + * @param fet_id FET number to check + * @return 0 if ok, -1 if FET value is out of range + */ +static int tps65090_check_fet(unsigned int fet_id) +{ + if (fet_id == 0 || fet_id > MAX_FET_NUM) { + debug("parameter fet_id is out of range, %u not in 1 ~ %u\n", + fet_id, MAX_FET_NUM); + return -1; + } + + return 0; +} + +/** + * Set the power state for a FET + * + * @param fet_id Fet number to set (1..MAX_FET_NUM) + * @param set 1 to power on FET, 0 to power off + * @return FET_ERR_COMMS if we got a comms error, FET_ERR_NOT_READY if the + * FET failed to change state. If all is ok, returns 0. + */ +static int tps65090_fet_set(int fet_id, int set) +{ + int retry, value; + uchar reg; + + value = FET_CTRL_ADENFET | FET_CTRL_WAIT; + if (set) + value |= FET_CTRL_ENFET; + + if (tps65090_i2c_write(REG_FET1_CTRL + fet_id - 1, value)) + return FET_ERR_COMMS; + /* Try reading until we get a result */ + for (retry = 0; retry < MAX_CTRL_READ_TRIES; retry++) { + if (tps65090_i2c_read(REG_FET1_CTRL + fet_id - 1, ®)) + return FET_ERR_COMMS; + + /* Check that the fet went into the expected state */ + if (!!(reg & FET_CTRL_PGFET) == set) + return 0; + + /* If we got a timeout, there is no point in waiting longer */ + if (reg & FET_CTRL_TOFET) + break; + + mdelay(1); + } + + debug("FET %d: Power good should have set to %d but reg=%#02x\n", + fet_id, set, reg); + return FET_ERR_NOT_READY; +} + +int tps65090_fet_enable(unsigned int fet_id) +{ + int loops; + ulong start; + int ret = 0; + + if (tps65090_check_fet(fet_id)) + return -1; + if (tps65090_select()) + return -1; + start = get_timer(0); + for (loops = 0; ; loops++) { + ret = tps65090_fet_set(fet_id, 1); + if (!ret) + break; + + if (get_timer(start) > 100) + break; + + /* Turn it off and try again until we time out */ + tps65090_fet_set(fet_id, 0); + } + tps65090_deselect(); + + if (ret) { + debug("%s: FET%d failed to power on: time=%lums, loops=%d\n", + __func__, fet_id, get_timer(start), loops); + } else if (loops) { + debug("%s: FET%d powered on after %lums, loops=%d\n", + __func__, fet_id, get_timer(start), loops); + } + /* + * Unfortunately, there are some conditions where the power + * good bit will be 0, but the fet still comes up. One such + * case occurs with the lcd backlight. We'll just return 0 here + * and assume that the fet will eventually come up. + */ + if (ret == FET_ERR_NOT_READY) + ret = 0; + + return ret; +} + +int tps65090_fet_disable(unsigned int fet_id) +{ + int ret; + + if (tps65090_check_fet(fet_id)) + return -1; + if (tps65090_select()) + return -1; + ret = tps65090_fet_set(fet_id, 0); + tps65090_deselect(); + + return ret; +} + +int tps65090_fet_is_enabled(unsigned int fet_id) +{ + unsigned char reg; + int ret; + + if (tps65090_check_fet(fet_id)) + return -1; + if (tps65090_select()) + return -1; + ret = tps65090_i2c_read(REG_FET1_CTRL + fet_id - 1, ®); + tps65090_deselect(); + if (ret) { + debug("fail to read FET%u_CTRL register over I2C", fet_id); + return -2; + } + + return reg & FET_CTRL_ENFET; +} + +int tps65090_get_charging(void) +{ + unsigned char val; + int ret; + + if (tps65090_select()) + return -1; + ret = tps65090_i2c_read(REG_CG_CTRL0, &val); + tps65090_deselect(); + if (ret) + return ret; + return val & CG_CTRL0_ENC_MASK ? 1 : 0; +} + +int tps65090_set_charge_enable(int enable) +{ + unsigned char val; + int ret; + + if (tps65090_select()) + return -1; + ret = tps65090_i2c_read(REG_CG_CTRL0, &val); + if (!ret) { + if (enable) + val |= CG_CTRL0_ENC_MASK; + else + val &= ~CG_CTRL0_ENC_MASK; + ret = tps65090_i2c_write(REG_CG_CTRL0, val); + } + tps65090_deselect(); + if (ret) { + debug("%s: Failed to read/write register\n", __func__); + return ret; + } + return 0; +} + +int tps65090_get_status(void) +{ + unsigned char val; + int ret; + + if (tps65090_select()) + return -1; + ret = tps65090_i2c_read(REG_CG_STATUS1, &val); + tps65090_deselect(); + if (ret) + return ret; + return val; +} + +static int tps65090_decode_config(struct tps65090_config *config) +{ +#ifdef CONFIG_OF_CONTROL + const void *blob = gd->fdt_blob; + int node, parent; + int i2c_bus; + + node = fdtdec_next_compatible(blob, 0, COMPAT_TI_TPS65090); + if (node < 0) { + debug("%s: Node not found\n", __func__); + return -1; + } + parent = fdt_parent_offset(blob, node); + if (parent < 0) { + debug("%s: Cannot find node parent\n", __func__); + return -1; + } + i2c_bus = i2c_get_bus_num_fdt(blob, parent); + if (i2c_bus < 0) + return -1; + config->bus = i2c_bus; + config->addr = fdtdec_get_addr(blob, node, "reg"); +#else + config->bus = CONFIG_TPS65090_I2C_BUS; + config->addr = TPS65090_I2C_ADDR; +#endif + return 0; +} + +int tps65090_init(void) +{ + int ret; + + if (tps65090_decode_config(&config)) + return -1; + + config.old_bus = -1; + + if (tps65090_select()) + return -1; + + /* Probe the chip */ + ret = i2c_probe(config.addr); + if (ret) + debug("%s: failed to probe TPS65090 over I2C, returned %d\n", + __func__, ret); + + return ret; +} diff --git a/src/drivers/ti/tps65090/tps65090.h b/src/drivers/ti/tps65090/tps65090.h new file mode 100644 index 0000000..b008a55 --- /dev/null +++ b/src/drivers/ti/tps65090/tps65090.h @@ -0,0 +1,83 @@ +/* + * Copyright (c) 2012 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. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + */ + +#ifndef __TPS65090_H_ +#define __TPS65090_H_ + +/* I2C device address for TPS65090 PMU */ +#define TPS65090_I2C_ADDR 0x48 + +enum { + /* Status register fields */ + TPS65090_ST1_OTC = 1 << 0, + TPS65090_ST1_OCC = 1 << 1, + TPS65090_ST1_STATE_SHIFT = 4, + TPS65090_ST1_STATE_MASK = 0xf << TPS65090_ST1_STATE_SHIFT, +}; + +/* FET errors */ +enum { + FET_ERR_COMMS = -1, /* FET comms error */ + FET_ERR_NOT_READY = -2, /* FET is not yet ready - retry */ +}; + +/** + * Enable FET + * + * @param 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); + +/** + * Disable FET + * + * @param 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); + +/** + * Is FET enabled? + * + * @param 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); + +/** + * Enable / disable the battery charger + * + * @param enable 0 to disable charging, non-zero to enable + */ +int tps65090_set_charge_enable(int enable); + +/** + * Check whether we have enabled battery charging + * + * @return 1 if enabled, 0 if disabled + */ +int tps65090_get_charging(void); + +/** + * Return the value of the status register + * + * @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); + +#endif /* __TPS65090_H_ */