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Many Motorola phones like droid 4 are using a custom PMIC called CPCAP or 6556002. This PMIC is used with several SoCs, I've noticed at least omap3, omap4 and Tegra2 based Motorola phones and tablets using it. Cc: devicetree@vger.kernel.org Cc: Marcel Partap <mpartap@gmx.net> Cc: Michael Scott <michael.scott@linaro.org> Cc: Rob Herring <robh@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Mark Brown <broonie@kernel.org>
465 lines
14 KiB
C
465 lines
14 KiB
C
/*
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* Motorola CPCAP PMIC regulator driver
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*
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* Based on cpcap-regulator.c from Motorola Linux kernel tree
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* Copyright (C) 2009-2011 Motorola, Inc.
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*
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* Rewritten for mainline kernel to use device tree and regmap
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* Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/mfd/motorola-cpcap.h>
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/*
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* Resource assignment register bits. These seem to control the state
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* idle modes adn are used at least for omap4.
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*/
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/* CPCAP_REG_ASSIGN2 bits - Resource Assignment 2 */
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#define CPCAP_BIT_VSDIO_SEL BIT(15)
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#define CPCAP_BIT_VDIG_SEL BIT(14)
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#define CPCAP_BIT_VCAM_SEL BIT(13)
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#define CPCAP_BIT_SW6_SEL BIT(12)
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#define CPCAP_BIT_SW5_SEL BIT(11)
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#define CPCAP_BIT_SW4_SEL BIT(10)
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#define CPCAP_BIT_SW3_SEL BIT(9)
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#define CPCAP_BIT_SW2_SEL BIT(8)
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#define CPCAP_BIT_SW1_SEL BIT(7)
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/* CPCAP_REG_ASSIGN3 bits - Resource Assignment 3 */
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#define CPCAP_BIT_VUSBINT2_SEL BIT(15)
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#define CPCAP_BIT_VUSBINT1_SEL BIT(14)
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#define CPCAP_BIT_VVIB_SEL BIT(13)
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#define CPCAP_BIT_VWLAN1_SEL BIT(12)
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#define CPCAP_BIT_VRF1_SEL BIT(11)
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#define CPCAP_BIT_VHVIO_SEL BIT(10)
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#define CPCAP_BIT_VDAC_SEL BIT(9)
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#define CPCAP_BIT_VUSB_SEL BIT(8)
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#define CPCAP_BIT_VSIM_SEL BIT(7)
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#define CPCAP_BIT_VRFREF_SEL BIT(6)
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#define CPCAP_BIT_VPLL_SEL BIT(5)
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#define CPCAP_BIT_VFUSE_SEL BIT(4)
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#define CPCAP_BIT_VCSI_SEL BIT(3)
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#define CPCAP_BIT_SPARE_14_2 BIT(2)
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#define CPCAP_BIT_VWLAN2_SEL BIT(1)
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#define CPCAP_BIT_VRF2_SEL BIT(0)
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/* CPCAP_REG_ASSIGN4 bits - Resource Assignment 4 */
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#define CPCAP_BIT_VAUDIO_SEL BIT(0)
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/*
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* Enable register bits. At least CPCAP_BIT_AUDIO_LOW_PWR is generic,
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* and not limited to audio regulator. Let's use the Motorola kernel
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* naming for now until we have a better understanding of the other
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* enable register bits. No idea why BIT(3) is not defined.
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*/
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#define CPCAP_BIT_AUDIO_LOW_PWR BIT(6)
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#define CPCAP_BIT_AUD_LOWPWR_SPEED BIT(5)
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#define CPCAP_BIT_VAUDIOPRISTBY BIT(4)
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#define CPCAP_BIT_VAUDIO_MODE1 BIT(2)
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#define CPCAP_BIT_VAUDIO_MODE0 BIT(1)
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#define CPCAP_BIT_V_AUDIO_EN BIT(0)
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/*
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* Off mode configuration bit. Used currently only by SW5 on omap4. There's
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* the following comment in Motorola Linux kernel tree for it:
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*
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* When set in the regulator mode, the regulator assignment will be changed
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* to secondary when the regulator is disabled. The mode will be set back to
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* primary when the regulator is turned on.
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*/
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#define CPCAP_REG_OFF_MODE_SEC BIT(15)
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/**
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* SoC specific configuraion for CPCAP regulator. There are at least three
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* different SoCs each with their own parameters: omap3, omap4 and tegra2.
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*
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* The assign_reg and assign_mask seem to allow toggling between primary
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* and secondary mode that at least omap4 uses for off mode.
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*/
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struct cpcap_regulator {
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struct regulator_desc rdesc;
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const u16 assign_reg;
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const u16 assign_mask;
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const u16 vsel_shift;
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};
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#define CPCAP_REG(_ID, reg, assignment_reg, assignment_mask, val_tbl, \
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mode_mask, volt_mask, volt_shft, \
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mode_val, off_val, volt_trans_time) { \
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.rdesc = { \
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.name = #_ID, \
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.of_match = of_match_ptr(#_ID), \
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.ops = &cpcap_regulator_ops, \
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.regulators_node = of_match_ptr("regulators"), \
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.type = REGULATOR_VOLTAGE, \
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.id = CPCAP_##_ID, \
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.owner = THIS_MODULE, \
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.n_voltages = ARRAY_SIZE(val_tbl), \
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.volt_table = (val_tbl), \
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.vsel_reg = (reg), \
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.vsel_mask = (volt_mask), \
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.enable_reg = (reg), \
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.enable_mask = (mode_mask), \
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.enable_val = (mode_val), \
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.disable_val = (off_val), \
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.ramp_delay = (volt_trans_time), \
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}, \
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.assign_reg = (assignment_reg), \
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.assign_mask = (assignment_mask), \
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.vsel_shift = (volt_shft), \
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}
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struct cpcap_ddata {
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struct regmap *reg;
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struct device *dev;
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const struct cpcap_regulator *soc;
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};
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enum cpcap_regulator_id {
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CPCAP_SW1,
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CPCAP_SW2,
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CPCAP_SW3,
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CPCAP_SW4,
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CPCAP_SW5,
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CPCAP_SW6,
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CPCAP_VCAM,
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CPCAP_VCSI,
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CPCAP_VDAC,
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CPCAP_VDIG,
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CPCAP_VFUSE,
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CPCAP_VHVIO,
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CPCAP_VSDIO,
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CPCAP_VPLL,
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CPCAP_VRF1,
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CPCAP_VRF2,
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CPCAP_VRFREF,
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CPCAP_VWLAN1,
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CPCAP_VWLAN2,
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CPCAP_VSIM,
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CPCAP_VSIMCARD,
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CPCAP_VVIB,
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CPCAP_VUSB,
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CPCAP_VAUDIO,
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CPCAP_NR_REGULATORS,
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};
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/*
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* We need to also configure regulator idle mode for SoC off mode if
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* CPCAP_REG_OFF_MODE_SEC is set.
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*/
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static int cpcap_regulator_enable(struct regulator_dev *rdev)
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{
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struct cpcap_regulator *regulator = rdev_get_drvdata(rdev);
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int error, ignore;
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error = regulator_enable_regmap(rdev);
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if (error)
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return error;
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if (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC) {
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error = regmap_update_bits(rdev->regmap, regulator->assign_reg,
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regulator->assign_mask,
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regulator->assign_mask);
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if (error)
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ignore = regulator_disable_regmap(rdev);
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}
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return error;
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}
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/*
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* We need to also configure regulator idle mode for SoC off mode if
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* CPCAP_REG_OFF_MODE_SEC is set.
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*/
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static int cpcap_regulator_disable(struct regulator_dev *rdev)
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{
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struct cpcap_regulator *regulator = rdev_get_drvdata(rdev);
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int error, ignore;
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if (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC) {
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error = regmap_update_bits(rdev->regmap, regulator->assign_reg,
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regulator->assign_mask, 0);
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if (error)
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return error;
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}
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error = regulator_disable_regmap(rdev);
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if (error && (rdev->desc->enable_val & CPCAP_REG_OFF_MODE_SEC)) {
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ignore = regmap_update_bits(rdev->regmap, regulator->assign_reg,
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regulator->assign_mask,
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regulator->assign_mask);
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}
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return error;
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}
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static unsigned int cpcap_regulator_get_mode(struct regulator_dev *rdev)
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{
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int value;
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regmap_read(rdev->regmap, rdev->desc->enable_reg, &value);
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if (!(value & CPCAP_BIT_AUDIO_LOW_PWR))
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return REGULATOR_MODE_STANDBY;
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return REGULATOR_MODE_NORMAL;
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}
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static int cpcap_regulator_set_mode(struct regulator_dev *rdev,
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unsigned int mode)
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{
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int value;
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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value = CPCAP_BIT_AUDIO_LOW_PWR;
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break;
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case REGULATOR_MODE_STANDBY:
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value = 0;
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break;
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default:
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return -EINVAL;
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}
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return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
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CPCAP_BIT_AUDIO_LOW_PWR, value);
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}
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static struct regulator_ops cpcap_regulator_ops = {
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.enable = cpcap_regulator_enable,
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.disable = cpcap_regulator_disable,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_iterate,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_mode = cpcap_regulator_get_mode,
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.set_mode = cpcap_regulator_set_mode,
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};
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static const unsigned int unknown_val_tbl[] = { 0, };
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static const unsigned int sw5_val_tbl[] = { 0, 5050000, };
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static const unsigned int vcam_val_tbl[] = { 2600000, 2700000, 2800000,
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2900000, };
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static const unsigned int vcsi_val_tbl[] = { 1200000, 1800000, };
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static const unsigned int vdac_val_tbl[] = { 1200000, 1500000, 1800000,
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2500000,};
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static const unsigned int vdig_val_tbl[] = { 1200000, 1350000, 1500000,
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1875000, };
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static const unsigned int vfuse_val_tbl[] = { 1500000, 1600000, 1700000,
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1800000, 1900000, 2000000,
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2100000, 2200000, 2300000,
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2400000, 2500000, 2600000,
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2700000, 3150000, };
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static const unsigned int vhvio_val_tbl[] = { 2775000, };
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static const unsigned int vsdio_val_tbl[] = { 1500000, 1600000, 1800000,
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2600000, 2700000, 2800000,
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2900000, 3000000, };
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static const unsigned int vpll_val_tbl[] = { 1200000, 1300000, 1400000,
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1800000, };
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/* Quirk: 2775000 is before 2500000 for vrf1 regulator */
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static const unsigned int vrf1_val_tbl[] = { 2775000, 2500000, };
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static const unsigned int vrf2_val_tbl[] = { 0, 2775000, };
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static const unsigned int vrfref_val_tbl[] = { 2500000, 2775000, };
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static const unsigned int vwlan1_val_tbl[] = { 1800000, 1900000, };
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static const unsigned int vwlan2_val_tbl[] = { 2775000, 3000000, 3300000,
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3300000, };
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static const unsigned int vsim_val_tbl[] = { 1800000, 2900000, };
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static const unsigned int vsimcard_val_tbl[] = { 1800000, 2900000, };
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static const unsigned int vvib_val_tbl[] = { 1300000, 1800000, 2000000,
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3000000, };
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static const unsigned int vusb_val_tbl[] = { 0, 3300000, };
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static const unsigned int vaudio_val_tbl[] = { 0, 2775000, };
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/**
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* SoC specific configuration for omap4. The data below is comes from Motorola
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* Linux kernel tree. It's basically the values of cpcap_regltr_data,
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* cpcap_regulator_mode_values and cpcap_regulator_off_mode_values, see
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* CPCAP_REG macro above.
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*
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* SW1 to SW4 and SW6 seems to be unused for mapphone. Note that VSIM and
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* VSIMCARD have a shared resource assignment bit.
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*/
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static struct cpcap_regulator omap4_regulators[] = {
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CPCAP_REG(SW1, CPCAP_REG_S1C1, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW1_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(SW2, CPCAP_REG_S2C1, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW2_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(SW3, CPCAP_REG_S3C, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW3_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(SW4, CPCAP_REG_S4C1, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW4_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(SW5, CPCAP_REG_S5C, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW5_SEL, sw5_val_tbl,
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0x28, 0, 0, 0x20 | CPCAP_REG_OFF_MODE_SEC, 0, 0),
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CPCAP_REG(SW6, CPCAP_REG_S6C, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_SW6_SEL, unknown_val_tbl,
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0, 0, 0, 0, 0, 0),
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CPCAP_REG(VCAM, CPCAP_REG_VCAMC, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_VCAM_SEL, vcam_val_tbl,
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0x87, 0x30, 4, 0x3, 0, 420),
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CPCAP_REG(VCSI, CPCAP_REG_VCSIC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VCSI_SEL, vcsi_val_tbl,
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0x47, 0x10, 4, 0x43, 0x41, 350),
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CPCAP_REG(VDAC, CPCAP_REG_VDACC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VDAC_SEL, vdac_val_tbl,
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0x87, 0x30, 4, 0x3, 0, 420),
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CPCAP_REG(VDIG, CPCAP_REG_VDIGC, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_VDIG_SEL, vdig_val_tbl,
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0x87, 0x30, 4, 0x82, 0, 420),
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CPCAP_REG(VFUSE, CPCAP_REG_VFUSEC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VFUSE_SEL, vfuse_val_tbl,
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0x80, 0xf, 0, 0x80, 0, 420),
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CPCAP_REG(VHVIO, CPCAP_REG_VHVIOC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VHVIO_SEL, vhvio_val_tbl,
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0x17, 0, 0, 0, 0x12, 0),
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CPCAP_REG(VSDIO, CPCAP_REG_VSDIOC, CPCAP_REG_ASSIGN2,
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CPCAP_BIT_VSDIO_SEL, vsdio_val_tbl,
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0x87, 0x38, 3, 0x82, 0, 420),
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CPCAP_REG(VPLL, CPCAP_REG_VPLLC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VPLL_SEL, vpll_val_tbl,
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0x43, 0x18, 3, 0x2, 0, 420),
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CPCAP_REG(VRF1, CPCAP_REG_VRF1C, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VRF1_SEL, vrf1_val_tbl,
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0xac, 0x2, 1, 0x4, 0, 10),
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CPCAP_REG(VRF2, CPCAP_REG_VRF2C, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VRF2_SEL, vrf2_val_tbl,
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0x23, 0x8, 3, 0, 0, 10),
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CPCAP_REG(VRFREF, CPCAP_REG_VRFREFC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VRFREF_SEL, vrfref_val_tbl,
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0x23, 0x8, 3, 0, 0, 420),
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CPCAP_REG(VWLAN1, CPCAP_REG_VWLAN1C, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VWLAN1_SEL, vwlan1_val_tbl,
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0x47, 0x10, 4, 0, 0, 420),
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CPCAP_REG(VWLAN2, CPCAP_REG_VWLAN2C, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VWLAN2_SEL, vwlan2_val_tbl,
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0x20c, 0xc0, 6, 0x20c, 0, 420),
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CPCAP_REG(VSIM, CPCAP_REG_VSIMC, CPCAP_REG_ASSIGN3,
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0xffff, vsim_val_tbl,
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0x23, 0x8, 3, 0x3, 0, 420),
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CPCAP_REG(VSIMCARD, CPCAP_REG_VSIMC, CPCAP_REG_ASSIGN3,
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0xffff, vsimcard_val_tbl,
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0x1e80, 0x8, 3, 0x1e00, 0, 420),
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CPCAP_REG(VVIB, CPCAP_REG_VVIBC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VVIB_SEL, vvib_val_tbl,
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0x1, 0xc, 2, 0x1, 0, 500),
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CPCAP_REG(VUSB, CPCAP_REG_VUSBC, CPCAP_REG_ASSIGN3,
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CPCAP_BIT_VUSB_SEL, vusb_val_tbl,
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0x11c, 0x40, 6, 0xc, 0, 0),
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CPCAP_REG(VAUDIO, CPCAP_REG_VAUDIOC, CPCAP_REG_ASSIGN4,
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CPCAP_BIT_VAUDIO_SEL, vaudio_val_tbl,
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0x16, 0x1, 0, 0x4, 0, 0),
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{ /* sentinel */ },
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};
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static const struct of_device_id cpcap_regulator_id_table[] = {
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{
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.compatible = "motorola,cpcap-regulator",
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},
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{
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.compatible = "motorola,mapphone-cpcap-regulator",
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.data = omap4_regulators,
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, cpcap_regulator_id_table);
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static int cpcap_regulator_probe(struct platform_device *pdev)
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{
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struct cpcap_ddata *ddata;
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const struct of_device_id *match;
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struct regulator_config config;
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struct regulator_init_data init_data;
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int i;
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match = of_match_device(of_match_ptr(cpcap_regulator_id_table),
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&pdev->dev);
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if (!match)
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return -EINVAL;
|
|
|
|
if (!match->data) {
|
|
dev_err(&pdev->dev, "no configuration data found\n");
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
|
|
if (!ddata)
|
|
return -ENOMEM;
|
|
|
|
ddata->reg = dev_get_regmap(pdev->dev.parent, NULL);
|
|
if (!ddata->reg)
|
|
return -ENODEV;
|
|
|
|
ddata->dev = &pdev->dev;
|
|
ddata->soc = match->data;
|
|
platform_set_drvdata(pdev, ddata);
|
|
|
|
memset(&config, 0, sizeof(config));
|
|
memset(&init_data, 0, sizeof(init_data));
|
|
config.dev = &pdev->dev;
|
|
config.regmap = ddata->reg;
|
|
config.init_data = &init_data;
|
|
|
|
for (i = 0; i < CPCAP_NR_REGULATORS; i++) {
|
|
const struct cpcap_regulator *regulator = &ddata->soc[i];
|
|
struct regulator_dev *rdev;
|
|
|
|
if (!regulator->rdesc.name)
|
|
break;
|
|
|
|
if (regulator->rdesc.volt_table == unknown_val_tbl)
|
|
continue;
|
|
|
|
config.driver_data = (void *)regulator;
|
|
rdev = devm_regulator_register(&pdev->dev,
|
|
®ulator->rdesc,
|
|
&config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev, "failed to register regulator %s\n",
|
|
regulator->rdesc.name);
|
|
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver cpcap_regulator_driver = {
|
|
.probe = cpcap_regulator_probe,
|
|
.driver = {
|
|
.name = "cpcap-regulator",
|
|
.of_match_table = of_match_ptr(cpcap_regulator_id_table),
|
|
},
|
|
};
|
|
|
|
module_platform_driver(cpcap_regulator_driver);
|
|
|
|
MODULE_ALIAS("platform:cpcap-regulator");
|
|
MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
|
|
MODULE_DESCRIPTION("CPCAP regulator driver");
|
|
MODULE_LICENSE("GPL v2");
|