![Bird, Tim](/assets/img/avatar_default.png)
Add a regulator to control the OTG chargepath switch. This is used by USB code to control VBUS direction - out for host mode on the OTG port, and in for charging mode. Signed-off-by: Tim Bird <tim.bird@sonymobile.com> Acked-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Reviewed-by: Andy Gross <andy.gross@linaro.org> [stephen.boyd@linaro.org: Fix supply name, constify ops, drop machine.h and of_regulator.h includes] Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org> Signed-off-by: Sebastian Reichel <sre@kernel.org>
1043 lines
26 KiB
C
1043 lines
26 KiB
C
/* Copyright (c) 2014, Sony Mobile Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* 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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* This driver is for the multi-block Switch-Mode Battery Charger and Boost
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* (SMBB) hardware, found in Qualcomm PM8941 PMICs. The charger is an
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* integrated, single-cell lithium-ion battery charger.
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*
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* Sub-components:
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* - Charger core
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* - Buck
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* - DC charge-path
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* - USB charge-path
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* - Battery interface
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* - Boost (not implemented)
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* - Misc
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* - HF-Buck
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*/
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/extcon.h>
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#include <linux/regulator/driver.h>
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#define SMBB_CHG_VMAX 0x040
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#define SMBB_CHG_VSAFE 0x041
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#define SMBB_CHG_CFG 0x043
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#define SMBB_CHG_IMAX 0x044
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#define SMBB_CHG_ISAFE 0x045
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#define SMBB_CHG_VIN_MIN 0x047
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#define SMBB_CHG_CTRL 0x049
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#define CTRL_EN BIT(7)
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#define SMBB_CHG_VBAT_WEAK 0x052
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#define SMBB_CHG_IBAT_TERM_CHG 0x05b
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#define IBAT_TERM_CHG_IEOC BIT(7)
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#define IBAT_TERM_CHG_IEOC_BMS BIT(7)
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#define IBAT_TERM_CHG_IEOC_CHG 0
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#define SMBB_CHG_VBAT_DET 0x05d
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#define SMBB_CHG_TCHG_MAX_EN 0x060
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#define TCHG_MAX_EN BIT(7)
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#define SMBB_CHG_WDOG_TIME 0x062
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#define SMBB_CHG_WDOG_EN 0x065
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#define WDOG_EN BIT(7)
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#define SMBB_BUCK_REG_MODE 0x174
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#define BUCK_REG_MODE BIT(0)
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#define BUCK_REG_MODE_VBAT BIT(0)
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#define BUCK_REG_MODE_VSYS 0
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#define SMBB_BAT_PRES_STATUS 0x208
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#define PRES_STATUS_BAT_PRES BIT(7)
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#define SMBB_BAT_TEMP_STATUS 0x209
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#define TEMP_STATUS_OK BIT(7)
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#define TEMP_STATUS_HOT BIT(6)
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#define SMBB_BAT_BTC_CTRL 0x249
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#define BTC_CTRL_COMP_EN BIT(7)
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#define BTC_CTRL_COLD_EXT BIT(1)
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#define BTC_CTRL_HOT_EXT_N BIT(0)
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#define SMBB_USB_IMAX 0x344
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#define SMBB_USB_OTG_CTL 0x348
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#define OTG_CTL_EN BIT(0)
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#define SMBB_USB_ENUM_TIMER_STOP 0x34e
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#define ENUM_TIMER_STOP BIT(0)
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#define SMBB_USB_SEC_ACCESS 0x3d0
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#define SEC_ACCESS_MAGIC 0xa5
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#define SMBB_USB_REV_BST 0x3ed
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#define REV_BST_CHG_GONE BIT(7)
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#define SMBB_DC_IMAX 0x444
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#define SMBB_MISC_REV2 0x601
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#define SMBB_MISC_BOOT_DONE 0x642
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#define BOOT_DONE BIT(7)
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#define STATUS_USBIN_VALID BIT(0) /* USB connection is valid */
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#define STATUS_DCIN_VALID BIT(1) /* DC connection is valid */
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#define STATUS_BAT_HOT BIT(2) /* Battery temp 1=Hot, 0=Cold */
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#define STATUS_BAT_OK BIT(3) /* Battery temp OK */
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#define STATUS_BAT_PRESENT BIT(4) /* Battery is present */
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#define STATUS_CHG_DONE BIT(5) /* Charge cycle is complete */
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#define STATUS_CHG_TRKL BIT(6) /* Trickle charging */
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#define STATUS_CHG_FAST BIT(7) /* Fast charging */
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#define STATUS_CHG_GONE BIT(8) /* No charger is connected */
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enum smbb_attr {
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ATTR_BAT_ISAFE,
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ATTR_BAT_IMAX,
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ATTR_USBIN_IMAX,
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ATTR_DCIN_IMAX,
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ATTR_BAT_VSAFE,
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ATTR_BAT_VMAX,
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ATTR_BAT_VMIN,
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ATTR_CHG_VDET,
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ATTR_VIN_MIN,
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_ATTR_CNT,
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};
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struct smbb_charger {
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unsigned int revision;
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unsigned int addr;
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struct device *dev;
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struct extcon_dev *edev;
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bool dc_disabled;
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bool jeita_ext_temp;
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unsigned long status;
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struct mutex statlock;
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unsigned int attr[_ATTR_CNT];
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struct power_supply *usb_psy;
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struct power_supply *dc_psy;
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struct power_supply *bat_psy;
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struct regmap *regmap;
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struct regulator_desc otg_rdesc;
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struct regulator_dev *otg_reg;
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};
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static const unsigned int smbb_usb_extcon_cable[] = {
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EXTCON_USB,
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EXTCON_NONE,
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};
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static int smbb_vbat_weak_fn(unsigned int index)
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{
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return 2100000 + index * 100000;
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}
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static int smbb_vin_fn(unsigned int index)
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{
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if (index > 42)
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return 5600000 + (index - 43) * 200000;
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return 3400000 + index * 50000;
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}
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static int smbb_vmax_fn(unsigned int index)
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{
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return 3240000 + index * 10000;
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}
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static int smbb_vbat_det_fn(unsigned int index)
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{
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return 3240000 + index * 20000;
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}
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static int smbb_imax_fn(unsigned int index)
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{
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if (index < 2)
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return 100000 + index * 50000;
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return index * 100000;
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}
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static int smbb_bat_imax_fn(unsigned int index)
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{
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return index * 50000;
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}
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static unsigned int smbb_hw_lookup(unsigned int val, int (*fn)(unsigned int))
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{
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unsigned int widx;
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unsigned int sel;
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for (widx = sel = 0; (*fn)(widx) <= val; ++widx)
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sel = widx;
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return sel;
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}
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static const struct smbb_charger_attr {
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const char *name;
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unsigned int reg;
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unsigned int safe_reg;
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unsigned int max;
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unsigned int min;
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unsigned int fail_ok;
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int (*hw_fn)(unsigned int);
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} smbb_charger_attrs[] = {
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[ATTR_BAT_ISAFE] = {
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.name = "qcom,fast-charge-safe-current",
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.reg = SMBB_CHG_ISAFE,
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.max = 3000000,
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.min = 200000,
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.hw_fn = smbb_bat_imax_fn,
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.fail_ok = 1,
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},
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[ATTR_BAT_IMAX] = {
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.name = "qcom,fast-charge-current-limit",
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.reg = SMBB_CHG_IMAX,
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.safe_reg = SMBB_CHG_ISAFE,
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.max = 3000000,
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.min = 200000,
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.hw_fn = smbb_bat_imax_fn,
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},
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[ATTR_DCIN_IMAX] = {
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.name = "qcom,dc-current-limit",
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.reg = SMBB_DC_IMAX,
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.max = 2500000,
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.min = 100000,
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.hw_fn = smbb_imax_fn,
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},
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[ATTR_BAT_VSAFE] = {
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.name = "qcom,fast-charge-safe-voltage",
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.reg = SMBB_CHG_VSAFE,
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.max = 5000000,
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.min = 3240000,
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.hw_fn = smbb_vmax_fn,
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.fail_ok = 1,
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},
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[ATTR_BAT_VMAX] = {
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.name = "qcom,fast-charge-high-threshold-voltage",
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.reg = SMBB_CHG_VMAX,
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.safe_reg = SMBB_CHG_VSAFE,
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.max = 5000000,
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.min = 3240000,
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.hw_fn = smbb_vmax_fn,
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},
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[ATTR_BAT_VMIN] = {
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.name = "qcom,fast-charge-low-threshold-voltage",
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.reg = SMBB_CHG_VBAT_WEAK,
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.max = 3600000,
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.min = 2100000,
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.hw_fn = smbb_vbat_weak_fn,
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},
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[ATTR_CHG_VDET] = {
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.name = "qcom,auto-recharge-threshold-voltage",
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.reg = SMBB_CHG_VBAT_DET,
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.max = 5000000,
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.min = 3240000,
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.hw_fn = smbb_vbat_det_fn,
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},
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[ATTR_VIN_MIN] = {
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.name = "qcom,minimum-input-voltage",
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.reg = SMBB_CHG_VIN_MIN,
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.max = 9600000,
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.min = 4200000,
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.hw_fn = smbb_vin_fn,
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},
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[ATTR_USBIN_IMAX] = {
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.name = "usb-charge-current-limit",
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.reg = SMBB_USB_IMAX,
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.max = 2500000,
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.min = 100000,
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.hw_fn = smbb_imax_fn,
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},
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};
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static int smbb_charger_attr_write(struct smbb_charger *chg,
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enum smbb_attr which, unsigned int val)
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{
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const struct smbb_charger_attr *prop;
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unsigned int wval;
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unsigned int out;
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int rc;
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prop = &smbb_charger_attrs[which];
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if (val > prop->max || val < prop->min) {
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dev_err(chg->dev, "value out of range for %s [%u:%u]\n",
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prop->name, prop->min, prop->max);
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return -EINVAL;
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}
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if (prop->safe_reg) {
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rc = regmap_read(chg->regmap,
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chg->addr + prop->safe_reg, &wval);
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if (rc) {
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dev_err(chg->dev,
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"unable to read safe value for '%s'\n",
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prop->name);
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return rc;
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}
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wval = prop->hw_fn(wval);
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if (val > wval) {
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dev_warn(chg->dev,
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"%s above safe value, clamping at %u\n",
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prop->name, wval);
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val = wval;
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}
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}
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wval = smbb_hw_lookup(val, prop->hw_fn);
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rc = regmap_write(chg->regmap, chg->addr + prop->reg, wval);
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if (rc) {
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dev_err(chg->dev, "unable to update %s", prop->name);
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return rc;
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}
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out = prop->hw_fn(wval);
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if (out != val) {
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dev_warn(chg->dev,
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"%s inaccurate, rounded to %u\n",
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prop->name, out);
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}
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dev_dbg(chg->dev, "%s <= %d\n", prop->name, out);
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chg->attr[which] = out;
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return 0;
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}
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static int smbb_charger_attr_read(struct smbb_charger *chg,
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enum smbb_attr which)
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{
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const struct smbb_charger_attr *prop;
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unsigned int val;
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int rc;
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prop = &smbb_charger_attrs[which];
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rc = regmap_read(chg->regmap, chg->addr + prop->reg, &val);
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if (rc) {
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dev_err(chg->dev, "failed to read %s\n", prop->name);
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return rc;
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}
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val = prop->hw_fn(val);
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dev_dbg(chg->dev, "%s => %d\n", prop->name, val);
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chg->attr[which] = val;
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return 0;
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}
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static int smbb_charger_attr_parse(struct smbb_charger *chg,
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enum smbb_attr which)
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{
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const struct smbb_charger_attr *prop;
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unsigned int val;
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int rc;
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prop = &smbb_charger_attrs[which];
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rc = of_property_read_u32(chg->dev->of_node, prop->name, &val);
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if (rc == 0) {
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rc = smbb_charger_attr_write(chg, which, val);
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if (!rc || !prop->fail_ok)
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return rc;
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}
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return smbb_charger_attr_read(chg, which);
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}
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static void smbb_set_line_flag(struct smbb_charger *chg, int irq, int flag)
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{
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bool state;
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int ret;
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ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, &state);
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if (ret < 0) {
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dev_err(chg->dev, "failed to read irq line\n");
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return;
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}
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mutex_lock(&chg->statlock);
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if (state)
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chg->status |= flag;
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else
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chg->status &= ~flag;
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mutex_unlock(&chg->statlock);
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dev_dbg(chg->dev, "status = %03lx\n", chg->status);
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}
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static irqreturn_t smbb_usb_valid_handler(int irq, void *_data)
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{
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struct smbb_charger *chg = _data;
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smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID);
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extcon_set_state_sync(chg->edev, EXTCON_USB,
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chg->status & STATUS_USBIN_VALID);
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power_supply_changed(chg->usb_psy);
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return IRQ_HANDLED;
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}
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static irqreturn_t smbb_dc_valid_handler(int irq, void *_data)
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{
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struct smbb_charger *chg = _data;
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smbb_set_line_flag(chg, irq, STATUS_DCIN_VALID);
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if (!chg->dc_disabled)
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power_supply_changed(chg->dc_psy);
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return IRQ_HANDLED;
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}
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static irqreturn_t smbb_bat_temp_handler(int irq, void *_data)
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{
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struct smbb_charger *chg = _data;
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unsigned int val;
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int rc;
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rc = regmap_read(chg->regmap, chg->addr + SMBB_BAT_TEMP_STATUS, &val);
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if (rc)
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return IRQ_HANDLED;
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mutex_lock(&chg->statlock);
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if (val & TEMP_STATUS_OK) {
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chg->status |= STATUS_BAT_OK;
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} else {
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chg->status &= ~STATUS_BAT_OK;
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if (val & TEMP_STATUS_HOT)
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chg->status |= STATUS_BAT_HOT;
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}
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mutex_unlock(&chg->statlock);
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power_supply_changed(chg->bat_psy);
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return IRQ_HANDLED;
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}
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static irqreturn_t smbb_bat_present_handler(int irq, void *_data)
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{
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struct smbb_charger *chg = _data;
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smbb_set_line_flag(chg, irq, STATUS_BAT_PRESENT);
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power_supply_changed(chg->bat_psy);
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return IRQ_HANDLED;
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}
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static irqreturn_t smbb_chg_done_handler(int irq, void *_data)
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{
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struct smbb_charger *chg = _data;
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smbb_set_line_flag(chg, irq, STATUS_CHG_DONE);
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power_supply_changed(chg->bat_psy);
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return IRQ_HANDLED;
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}
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static irqreturn_t smbb_chg_gone_handler(int irq, void *_data)
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{
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struct smbb_charger *chg = _data;
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smbb_set_line_flag(chg, irq, STATUS_CHG_GONE);
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power_supply_changed(chg->bat_psy);
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power_supply_changed(chg->usb_psy);
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if (!chg->dc_disabled)
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power_supply_changed(chg->dc_psy);
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return IRQ_HANDLED;
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}
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static irqreturn_t smbb_chg_fast_handler(int irq, void *_data)
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{
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struct smbb_charger *chg = _data;
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smbb_set_line_flag(chg, irq, STATUS_CHG_FAST);
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power_supply_changed(chg->bat_psy);
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return IRQ_HANDLED;
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}
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static irqreturn_t smbb_chg_trkl_handler(int irq, void *_data)
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{
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struct smbb_charger *chg = _data;
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smbb_set_line_flag(chg, irq, STATUS_CHG_TRKL);
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power_supply_changed(chg->bat_psy);
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return IRQ_HANDLED;
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}
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static const struct smbb_irq {
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const char *name;
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irqreturn_t (*handler)(int, void *);
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} smbb_charger_irqs[] = {
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{ "chg-done", smbb_chg_done_handler },
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{ "chg-fast", smbb_chg_fast_handler },
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{ "chg-trkl", smbb_chg_trkl_handler },
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{ "bat-temp-ok", smbb_bat_temp_handler },
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{ "bat-present", smbb_bat_present_handler },
|
|
{ "chg-gone", smbb_chg_gone_handler },
|
|
{ "usb-valid", smbb_usb_valid_handler },
|
|
{ "dc-valid", smbb_dc_valid_handler },
|
|
};
|
|
|
|
static int smbb_usbin_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct smbb_charger *chg = power_supply_get_drvdata(psy);
|
|
int rc = 0;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
mutex_lock(&chg->statlock);
|
|
val->intval = !(chg->status & STATUS_CHG_GONE) &&
|
|
(chg->status & STATUS_USBIN_VALID);
|
|
mutex_unlock(&chg->statlock);
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
|
|
val->intval = chg->attr[ATTR_USBIN_IMAX];
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
|
|
val->intval = 2500000;
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int smbb_usbin_set_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
const union power_supply_propval *val)
|
|
{
|
|
struct smbb_charger *chg = power_supply_get_drvdata(psy);
|
|
int rc;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
|
|
rc = smbb_charger_attr_write(chg, ATTR_USBIN_IMAX,
|
|
val->intval);
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int smbb_dcin_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct smbb_charger *chg = power_supply_get_drvdata(psy);
|
|
int rc = 0;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
mutex_lock(&chg->statlock);
|
|
val->intval = !(chg->status & STATUS_CHG_GONE) &&
|
|
(chg->status & STATUS_DCIN_VALID);
|
|
mutex_unlock(&chg->statlock);
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
|
|
val->intval = chg->attr[ATTR_DCIN_IMAX];
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
|
|
val->intval = 2500000;
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int smbb_dcin_set_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
const union power_supply_propval *val)
|
|
{
|
|
struct smbb_charger *chg = power_supply_get_drvdata(psy);
|
|
int rc;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
|
|
rc = smbb_charger_attr_write(chg, ATTR_DCIN_IMAX,
|
|
val->intval);
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int smbb_charger_writable_property(struct power_supply *psy,
|
|
enum power_supply_property psp)
|
|
{
|
|
return psp == POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT;
|
|
}
|
|
|
|
static int smbb_battery_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct smbb_charger *chg = power_supply_get_drvdata(psy);
|
|
unsigned long status;
|
|
int rc = 0;
|
|
|
|
mutex_lock(&chg->statlock);
|
|
status = chg->status;
|
|
mutex_unlock(&chg->statlock);
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
if (status & STATUS_CHG_GONE)
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
else if (!(status & (STATUS_DCIN_VALID | STATUS_USBIN_VALID)))
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
else if (status & STATUS_CHG_DONE)
|
|
val->intval = POWER_SUPPLY_STATUS_FULL;
|
|
else if (!(status & STATUS_BAT_OK))
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
else if (status & (STATUS_CHG_FAST | STATUS_CHG_TRKL))
|
|
val->intval = POWER_SUPPLY_STATUS_CHARGING;
|
|
else /* everything is ok for charging, but we are not... */
|
|
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
break;
|
|
case POWER_SUPPLY_PROP_HEALTH:
|
|
if (status & STATUS_BAT_OK)
|
|
val->intval = POWER_SUPPLY_HEALTH_GOOD;
|
|
else if (status & STATUS_BAT_HOT)
|
|
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
|
|
else
|
|
val->intval = POWER_SUPPLY_HEALTH_COLD;
|
|
break;
|
|
case POWER_SUPPLY_PROP_CHARGE_TYPE:
|
|
if (status & STATUS_CHG_FAST)
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
|
|
else if (status & STATUS_CHG_TRKL)
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
|
|
else
|
|
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
|
|
break;
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
val->intval = !!(status & STATUS_BAT_PRESENT);
|
|
break;
|
|
case POWER_SUPPLY_PROP_CURRENT_MAX:
|
|
val->intval = chg->attr[ATTR_BAT_IMAX];
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
|
|
val->intval = chg->attr[ATTR_BAT_VMAX];
|
|
break;
|
|
case POWER_SUPPLY_PROP_TECHNOLOGY:
|
|
/* this charger is a single-cell lithium-ion battery charger
|
|
* only. If you hook up some other technology, there will be
|
|
* fireworks.
|
|
*/
|
|
val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
|
|
val->intval = 3000000; /* single-cell li-ion low end */
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int smbb_battery_set_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
const union power_supply_propval *val)
|
|
{
|
|
struct smbb_charger *chg = power_supply_get_drvdata(psy);
|
|
int rc;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_CURRENT_MAX:
|
|
rc = smbb_charger_attr_write(chg, ATTR_BAT_IMAX, val->intval);
|
|
break;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
|
|
rc = smbb_charger_attr_write(chg, ATTR_BAT_VMAX, val->intval);
|
|
break;
|
|
default:
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int smbb_battery_writable_property(struct power_supply *psy,
|
|
enum power_supply_property psp)
|
|
{
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_CURRENT_MAX:
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static enum power_supply_property smbb_charger_properties[] = {
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
|
|
POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
|
|
};
|
|
|
|
static enum power_supply_property smbb_battery_properties[] = {
|
|
POWER_SUPPLY_PROP_STATUS,
|
|
POWER_SUPPLY_PROP_HEALTH,
|
|
POWER_SUPPLY_PROP_PRESENT,
|
|
POWER_SUPPLY_PROP_CHARGE_TYPE,
|
|
POWER_SUPPLY_PROP_CURRENT_MAX,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MAX,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
|
|
POWER_SUPPLY_PROP_TECHNOLOGY,
|
|
};
|
|
|
|
static const struct reg_off_mask_default {
|
|
unsigned int offset;
|
|
unsigned int mask;
|
|
unsigned int value;
|
|
unsigned int rev_mask;
|
|
} smbb_charger_setup[] = {
|
|
/* The bootloader is supposed to set this... make sure anyway. */
|
|
{ SMBB_MISC_BOOT_DONE, BOOT_DONE, BOOT_DONE },
|
|
|
|
/* Disable software timer */
|
|
{ SMBB_CHG_TCHG_MAX_EN, TCHG_MAX_EN, 0 },
|
|
|
|
/* Clear and disable watchdog */
|
|
{ SMBB_CHG_WDOG_TIME, 0xff, 160 },
|
|
{ SMBB_CHG_WDOG_EN, WDOG_EN, 0 },
|
|
|
|
/* Use charger based EoC detection */
|
|
{ SMBB_CHG_IBAT_TERM_CHG, IBAT_TERM_CHG_IEOC, IBAT_TERM_CHG_IEOC_CHG },
|
|
|
|
/* Disable GSM PA load adjustment.
|
|
* The PA signal is incorrectly connected on v2.
|
|
*/
|
|
{ SMBB_CHG_CFG, 0xff, 0x00, BIT(3) },
|
|
|
|
/* Use VBAT (not VSYS) to compensate for IR drop during fast charging */
|
|
{ SMBB_BUCK_REG_MODE, BUCK_REG_MODE, BUCK_REG_MODE_VBAT },
|
|
|
|
/* Enable battery temperature comparators */
|
|
{ SMBB_BAT_BTC_CTRL, BTC_CTRL_COMP_EN, BTC_CTRL_COMP_EN },
|
|
|
|
/* Stop USB enumeration timer */
|
|
{ SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP },
|
|
|
|
#if 0 /* FIXME supposedly only to disable hardware ARB termination */
|
|
{ SMBB_USB_SEC_ACCESS, SEC_ACCESS_MAGIC },
|
|
{ SMBB_USB_REV_BST, 0xff, REV_BST_CHG_GONE },
|
|
#endif
|
|
|
|
/* Stop USB enumeration timer, again */
|
|
{ SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP },
|
|
|
|
/* Enable charging */
|
|
{ SMBB_CHG_CTRL, CTRL_EN, CTRL_EN },
|
|
};
|
|
|
|
static char *smbb_bif[] = { "smbb-bif" };
|
|
|
|
static const struct power_supply_desc bat_psy_desc = {
|
|
.name = "smbb-bif",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.properties = smbb_battery_properties,
|
|
.num_properties = ARRAY_SIZE(smbb_battery_properties),
|
|
.get_property = smbb_battery_get_property,
|
|
.set_property = smbb_battery_set_property,
|
|
.property_is_writeable = smbb_battery_writable_property,
|
|
};
|
|
|
|
static const struct power_supply_desc usb_psy_desc = {
|
|
.name = "smbb-usbin",
|
|
.type = POWER_SUPPLY_TYPE_USB,
|
|
.properties = smbb_charger_properties,
|
|
.num_properties = ARRAY_SIZE(smbb_charger_properties),
|
|
.get_property = smbb_usbin_get_property,
|
|
.set_property = smbb_usbin_set_property,
|
|
.property_is_writeable = smbb_charger_writable_property,
|
|
};
|
|
|
|
static const struct power_supply_desc dc_psy_desc = {
|
|
.name = "smbb-dcin",
|
|
.type = POWER_SUPPLY_TYPE_MAINS,
|
|
.properties = smbb_charger_properties,
|
|
.num_properties = ARRAY_SIZE(smbb_charger_properties),
|
|
.get_property = smbb_dcin_get_property,
|
|
.set_property = smbb_dcin_set_property,
|
|
.property_is_writeable = smbb_charger_writable_property,
|
|
};
|
|
|
|
static int smbb_chg_otg_enable(struct regulator_dev *rdev)
|
|
{
|
|
struct smbb_charger *chg = rdev_get_drvdata(rdev);
|
|
int rc;
|
|
|
|
rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL,
|
|
OTG_CTL_EN, OTG_CTL_EN);
|
|
if (rc)
|
|
dev_err(chg->dev, "failed to update OTG_CTL\n");
|
|
return rc;
|
|
}
|
|
|
|
static int smbb_chg_otg_disable(struct regulator_dev *rdev)
|
|
{
|
|
struct smbb_charger *chg = rdev_get_drvdata(rdev);
|
|
int rc;
|
|
|
|
rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL,
|
|
OTG_CTL_EN, 0);
|
|
if (rc)
|
|
dev_err(chg->dev, "failed to update OTG_CTL\n");
|
|
return rc;
|
|
}
|
|
|
|
static int smbb_chg_otg_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
struct smbb_charger *chg = rdev_get_drvdata(rdev);
|
|
unsigned int value = 0;
|
|
int rc;
|
|
|
|
rc = regmap_read(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, &value);
|
|
if (rc)
|
|
dev_err(chg->dev, "failed to read OTG_CTL\n");
|
|
|
|
return !!(value & OTG_CTL_EN);
|
|
}
|
|
|
|
static const struct regulator_ops smbb_chg_otg_ops = {
|
|
.enable = smbb_chg_otg_enable,
|
|
.disable = smbb_chg_otg_disable,
|
|
.is_enabled = smbb_chg_otg_is_enabled,
|
|
};
|
|
|
|
static int smbb_charger_probe(struct platform_device *pdev)
|
|
{
|
|
struct power_supply_config bat_cfg = {};
|
|
struct power_supply_config usb_cfg = {};
|
|
struct power_supply_config dc_cfg = {};
|
|
struct smbb_charger *chg;
|
|
struct regulator_config config = { };
|
|
int rc, i;
|
|
|
|
chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
|
|
if (!chg)
|
|
return -ENOMEM;
|
|
|
|
chg->dev = &pdev->dev;
|
|
mutex_init(&chg->statlock);
|
|
|
|
chg->regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
|
if (!chg->regmap) {
|
|
dev_err(&pdev->dev, "failed to locate regmap\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
rc = of_property_read_u32(pdev->dev.of_node, "reg", &chg->addr);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "missing or invalid 'reg' property\n");
|
|
return rc;
|
|
}
|
|
|
|
rc = regmap_read(chg->regmap, chg->addr + SMBB_MISC_REV2, &chg->revision);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "unable to read revision\n");
|
|
return rc;
|
|
}
|
|
|
|
chg->revision += 1;
|
|
if (chg->revision != 2 && chg->revision != 3) {
|
|
dev_err(&pdev->dev, "v1 hardware not supported\n");
|
|
return -ENODEV;
|
|
}
|
|
dev_info(&pdev->dev, "Initializing SMBB rev %u", chg->revision);
|
|
|
|
chg->dc_disabled = of_property_read_bool(pdev->dev.of_node, "qcom,disable-dc");
|
|
|
|
for (i = 0; i < _ATTR_CNT; ++i) {
|
|
rc = smbb_charger_attr_parse(chg, i);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "failed to parse/apply settings\n");
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
bat_cfg.drv_data = chg;
|
|
bat_cfg.of_node = pdev->dev.of_node;
|
|
chg->bat_psy = devm_power_supply_register(&pdev->dev,
|
|
&bat_psy_desc,
|
|
&bat_cfg);
|
|
if (IS_ERR(chg->bat_psy)) {
|
|
dev_err(&pdev->dev, "failed to register battery\n");
|
|
return PTR_ERR(chg->bat_psy);
|
|
}
|
|
|
|
usb_cfg.drv_data = chg;
|
|
usb_cfg.supplied_to = smbb_bif;
|
|
usb_cfg.num_supplicants = ARRAY_SIZE(smbb_bif);
|
|
chg->usb_psy = devm_power_supply_register(&pdev->dev,
|
|
&usb_psy_desc,
|
|
&usb_cfg);
|
|
if (IS_ERR(chg->usb_psy)) {
|
|
dev_err(&pdev->dev, "failed to register USB power supply\n");
|
|
return PTR_ERR(chg->usb_psy);
|
|
}
|
|
|
|
chg->edev = devm_extcon_dev_allocate(&pdev->dev, smbb_usb_extcon_cable);
|
|
if (IS_ERR(chg->edev)) {
|
|
dev_err(&pdev->dev, "failed to allocate extcon device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rc = devm_extcon_dev_register(&pdev->dev, chg->edev);
|
|
if (rc < 0) {
|
|
dev_err(&pdev->dev, "failed to register extcon device\n");
|
|
return rc;
|
|
}
|
|
|
|
if (!chg->dc_disabled) {
|
|
dc_cfg.drv_data = chg;
|
|
dc_cfg.supplied_to = smbb_bif;
|
|
dc_cfg.num_supplicants = ARRAY_SIZE(smbb_bif);
|
|
chg->dc_psy = devm_power_supply_register(&pdev->dev,
|
|
&dc_psy_desc,
|
|
&dc_cfg);
|
|
if (IS_ERR(chg->dc_psy)) {
|
|
dev_err(&pdev->dev, "failed to register DC power supply\n");
|
|
return PTR_ERR(chg->dc_psy);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(smbb_charger_irqs); ++i) {
|
|
int irq;
|
|
|
|
irq = platform_get_irq_byname(pdev, smbb_charger_irqs[i].name);
|
|
if (irq < 0) {
|
|
dev_err(&pdev->dev, "failed to get irq '%s'\n",
|
|
smbb_charger_irqs[i].name);
|
|
return irq;
|
|
}
|
|
|
|
smbb_charger_irqs[i].handler(irq, chg);
|
|
|
|
rc = devm_request_threaded_irq(&pdev->dev, irq, NULL,
|
|
smbb_charger_irqs[i].handler, IRQF_ONESHOT,
|
|
smbb_charger_irqs[i].name, chg);
|
|
if (rc) {
|
|
dev_err(&pdev->dev, "failed to request irq '%s'\n",
|
|
smbb_charger_irqs[i].name);
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* otg regulator is used to control VBUS voltage direction
|
|
* when USB switches between host and gadget mode
|
|
*/
|
|
chg->otg_rdesc.id = -1;
|
|
chg->otg_rdesc.name = "otg-vbus";
|
|
chg->otg_rdesc.ops = &smbb_chg_otg_ops;
|
|
chg->otg_rdesc.owner = THIS_MODULE;
|
|
chg->otg_rdesc.type = REGULATOR_VOLTAGE;
|
|
chg->otg_rdesc.supply_name = "usb-otg-in";
|
|
chg->otg_rdesc.of_match = "otg-vbus";
|
|
|
|
config.dev = &pdev->dev;
|
|
config.driver_data = chg;
|
|
|
|
chg->otg_reg = devm_regulator_register(&pdev->dev, &chg->otg_rdesc,
|
|
&config);
|
|
if (IS_ERR(chg->otg_reg))
|
|
return PTR_ERR(chg->otg_reg);
|
|
|
|
chg->jeita_ext_temp = of_property_read_bool(pdev->dev.of_node,
|
|
"qcom,jeita-extended-temp-range");
|
|
|
|
/* Set temperature range to [35%:70%] or [25%:80%] accordingly */
|
|
rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_BAT_BTC_CTRL,
|
|
BTC_CTRL_COLD_EXT | BTC_CTRL_HOT_EXT_N,
|
|
chg->jeita_ext_temp ?
|
|
BTC_CTRL_COLD_EXT :
|
|
BTC_CTRL_HOT_EXT_N);
|
|
if (rc) {
|
|
dev_err(&pdev->dev,
|
|
"unable to set %s temperature range\n",
|
|
chg->jeita_ext_temp ? "JEITA extended" : "normal");
|
|
return rc;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(smbb_charger_setup); ++i) {
|
|
const struct reg_off_mask_default *r = &smbb_charger_setup[i];
|
|
|
|
if (r->rev_mask & BIT(chg->revision))
|
|
continue;
|
|
|
|
rc = regmap_update_bits(chg->regmap, chg->addr + r->offset,
|
|
r->mask, r->value);
|
|
if (rc) {
|
|
dev_err(&pdev->dev,
|
|
"unable to initializing charging, bailing\n");
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
platform_set_drvdata(pdev, chg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smbb_charger_remove(struct platform_device *pdev)
|
|
{
|
|
struct smbb_charger *chg;
|
|
|
|
chg = platform_get_drvdata(pdev);
|
|
|
|
regmap_update_bits(chg->regmap, chg->addr + SMBB_CHG_CTRL, CTRL_EN, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id smbb_charger_id_table[] = {
|
|
{ .compatible = "qcom,pm8941-charger" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, smbb_charger_id_table);
|
|
|
|
static struct platform_driver smbb_charger_driver = {
|
|
.probe = smbb_charger_probe,
|
|
.remove = smbb_charger_remove,
|
|
.driver = {
|
|
.name = "qcom-smbb",
|
|
.of_match_table = smbb_charger_id_table,
|
|
},
|
|
};
|
|
module_platform_driver(smbb_charger_driver);
|
|
|
|
MODULE_DESCRIPTION("Qualcomm Switch-Mode Battery Charger and Boost driver");
|
|
MODULE_LICENSE("GPL v2");
|