| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tony Lindgren | 2703 | 99.93% | 7 | 87.50% |
| Pan Bian | 2 | 0.07% | 1 | 12.50% |
| Total | 2705 | 8 |
/* * Motorola CPCAP PMIC battery charger driver * * Copyright (C) 2017 Tony Lindgren <tony@atomide.com> * * Rewritten for Linux power framework with some parts based on * on earlier driver found in the Motorola Linux kernel: * * Copyright (C) 2009-2010 Motorola, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * 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. */ #include <linux/atomic.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/notifier.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/regmap.h> #include <linux/gpio/consumer.h> #include <linux/usb/phy_companion.h> #include <linux/phy/omap_usb.h> #include <linux/usb/otg.h> #include <linux/iio/consumer.h> #include <linux/mfd/motorola-cpcap.h> /* * CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware, * see NXP "MC13783 Power Management and Audio Circuit Users's Guide" * MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers * and values for CPCAP are different, but some of the internal components seem * similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1 * bits that seem to describe the CRM register. */ #define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */ #define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */ #define CPCAP_REG_CRM_CHRG_LED_EN BIT(13) /* Charger LED */ #define CPCAP_REG_CRM_RVRSMODE BIT(12) /* USB VBUS output enable */ #define CPCAP_REG_CRM_ICHRG_TR1 BIT(11) /* Trickle charge current */ #define CPCAP_REG_CRM_ICHRG_TR0 BIT(10) #define CPCAP_REG_CRM_FET_OVRD BIT(9) /* 0 = hardware, 1 = FET_CTRL */ #define CPCAP_REG_CRM_FET_CTRL BIT(8) /* BPFET 1 if FET_OVRD set */ #define CPCAP_REG_CRM_VCHRG3 BIT(7) /* Charge voltage bits */ #define CPCAP_REG_CRM_VCHRG2 BIT(6) #define CPCAP_REG_CRM_VCHRG1 BIT(5) #define CPCAP_REG_CRM_VCHRG0 BIT(4) #define CPCAP_REG_CRM_ICHRG3 BIT(3) /* Charge current bits */ #define CPCAP_REG_CRM_ICHRG2 BIT(2) #define CPCAP_REG_CRM_ICHRG1 BIT(1) #define CPCAP_REG_CRM_ICHRG0 BIT(0) /* CPCAP_REG_CRM trickle charge voltages */ #define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10) #define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0) #define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1) #define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2) #define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4) /* * CPCAP_REG_CRM charge voltages based on the ADC channel 1 values. * Note that these register bits don't match MC13783UG.pdf VCHRG * register bits. */ #define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4) #define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0) #define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1) #define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2) #define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3) #define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4) #define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5) #define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6) #define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7) #define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8) #define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9) #define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa) #define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb) #define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc) #define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd) #define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe) #define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf) /* * CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf * values in "Table 8-3. Charge Path Regulator Current Limit * Characteristics" for the nominal values. */ #define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0) #define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0) #define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1) #define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2) #define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3) #define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4) #define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5) #define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6) #define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7) #define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8) #define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9) #define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa) #define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb) #define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc) #define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd) #define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe) #define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf) enum { CPCAP_CHARGER_IIO_BATTDET, CPCAP_CHARGER_IIO_VOLTAGE, CPCAP_CHARGER_IIO_VBUS, CPCAP_CHARGER_IIO_CHRG_CURRENT, CPCAP_CHARGER_IIO_BATT_CURRENT, CPCAP_CHARGER_IIO_NR, }; struct cpcap_charger_ddata { struct device *dev; struct regmap *reg; struct list_head irq_list; struct delayed_work detect_work; struct delayed_work vbus_work; struct gpio_desc *gpio[2]; /* gpio_reven0 & 1 */ struct iio_channel *channels[CPCAP_CHARGER_IIO_NR]; struct power_supply *usb; struct phy_companion comparator; /* For USB VBUS */ bool vbus_enabled; atomic_t active; int status; }; struct cpcap_interrupt_desc { int irq; struct list_head node; const char *name; }; struct cpcap_charger_ints_state { bool chrg_det; bool rvrs_chrg; bool vbusov; bool chrg_se1b; bool rvrs_mode; bool chrgcurr1; bool vbusvld; bool battdetb; }; static enum power_supply_property cpcap_charger_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_ONLINE, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_NOW, }; static bool cpcap_charger_battery_found(struct cpcap_charger_ddata *ddata) { struct iio_channel *channel; int error, value; channel = ddata->channels[CPCAP_CHARGER_IIO_BATTDET]; error = iio_read_channel_raw(channel, &value); if (error < 0) { dev_warn(ddata->dev, "%s failed: %i\n", __func__, error); return false; } return value == 1; } static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata) { struct iio_channel *channel; int error, value = 0; channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE]; error = iio_read_channel_processed(channel, &value); if (error < 0) { dev_warn(ddata->dev, "%s failed: %i\n", __func__, error); return 0; } return value; } static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata) { struct iio_channel *channel; int error, value = 0; channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT]; error = iio_read_channel_processed(channel, &value); if (error < 0) { dev_warn(ddata->dev, "%s failed: %i\n", __func__, error); return 0; } return value; } static int cpcap_charger_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent); switch (psp) { case POWER_SUPPLY_PROP_STATUS: val->intval = ddata->status; break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: if (ddata->status == POWER_SUPPLY_STATUS_CHARGING) val->intval = cpcap_charger_get_charge_voltage(ddata) * 1000; else val->intval = 0; break; case POWER_SUPPLY_PROP_CURRENT_NOW: if (ddata->status == POWER_SUPPLY_STATUS_CHARGING) val->intval = cpcap_charger_get_charge_current(ddata) * 1000; else val->intval = 0; break; case POWER_SUPPLY_PROP_ONLINE: val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING; break; default: return -EINVAL; } return 0; } static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata, bool enabled) { if (!ddata->gpio[0]) return; gpiod_set_value(ddata->gpio[0], enabled); } static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata, bool enabled) { if (!ddata->gpio[1]) return; gpiod_set_value(ddata->gpio[1], enabled); } static int cpcap_charger_set_state(struct cpcap_charger_ddata *ddata, int max_voltage, int charge_current, int trickle_current) { bool enable; int error; enable = (charge_current || trickle_current); dev_dbg(ddata->dev, "%s enable: %i\n", __func__, enable); if (!enable) { error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff, CPCAP_REG_CRM_FET_OVRD | CPCAP_REG_CRM_FET_CTRL); if (error) { ddata->status = POWER_SUPPLY_STATUS_UNKNOWN; goto out_err; } ddata->status = POWER_SUPPLY_STATUS_DISCHARGING; return 0; } error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff, CPCAP_REG_CRM_CHRG_LED_EN | trickle_current | CPCAP_REG_CRM_FET_OVRD | CPCAP_REG_CRM_FET_CTRL | max_voltage | charge_current); if (error) { ddata->status = POWER_SUPPLY_STATUS_UNKNOWN; goto out_err; } ddata->status = POWER_SUPPLY_STATUS_CHARGING; return 0; out_err: dev_err(ddata->dev, "%s failed with %i\n", __func__, error); return error; } static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata) { int error, value = 0; struct iio_channel *channel = ddata->channels[CPCAP_CHARGER_IIO_VBUS]; error = iio_read_channel_processed(channel, &value); if (error >= 0) return value > 3900 ? true : false; dev_err(ddata->dev, "error reading VBUS: %i\n", error); return false; } /* VBUS control functions for the USB PHY companion */ static void cpcap_charger_vbus_work(struct work_struct *work) { struct cpcap_charger_ddata *ddata; bool vbus = false; int error; ddata = container_of(work, struct cpcap_charger_ddata, vbus_work.work); if (ddata->vbus_enabled) { vbus = cpcap_charger_vbus_valid(ddata); if (vbus) { dev_info(ddata->dev, "VBUS already provided\n"); return; } cpcap_charger_set_cable_path(ddata, false); cpcap_charger_set_inductive_path(ddata, false); error = cpcap_charger_set_state(ddata, 0, 0, 0); if (error) goto out_err; error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, CPCAP_REG_CRM_RVRSMODE, CPCAP_REG_CRM_RVRSMODE); if (error) goto out_err; } else { error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, CPCAP_REG_CRM_RVRSMODE, 0); if (error) goto out_err; cpcap_charger_set_cable_path(ddata, true); cpcap_charger_set_inductive_path(ddata, true); } return; out_err: dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__, ddata->vbus_enabled ? "enable" : "disable", error); } static int cpcap_charger_set_vbus(struct phy_companion *comparator, bool enabled) { struct cpcap_charger_ddata *ddata = container_of(comparator, struct cpcap_charger_ddata, comparator); ddata->vbus_enabled = enabled; schedule_delayed_work(&ddata->vbus_work, 0); return 0; } /* Charger interrupt handling functions */ static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata, struct cpcap_charger_ints_state *s) { int val, error; error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val); if (error) return error; s->chrg_det = val & BIT(13); s->rvrs_chrg = val & BIT(12); s->vbusov = val & BIT(11); error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val); if (error) return error; s->chrg_se1b = val & BIT(13); s->rvrs_mode = val & BIT(6); s->chrgcurr1 = val & BIT(4); s->vbusvld = val & BIT(3); error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val); if (error) return error; s->battdetb = val & BIT(6); return 0; } static void cpcap_usb_detect(struct work_struct *work) { struct cpcap_charger_ddata *ddata; struct cpcap_charger_ints_state s; int error; ddata = container_of(work, struct cpcap_charger_ddata, detect_work.work); error = cpcap_charger_get_ints_state(ddata, &s); if (error) return; if (cpcap_charger_vbus_valid(ddata) && s.chrgcurr1) { int max_current; if (cpcap_charger_battery_found(ddata)) max_current = CPCAP_REG_CRM_ICHRG_1A596; else max_current = CPCAP_REG_CRM_ICHRG_0A532; error = cpcap_charger_set_state(ddata, CPCAP_REG_CRM_VCHRG_4V35, max_current, 0); if (error) goto out_err; } else { error = cpcap_charger_set_state(ddata, 0, 0, 0); if (error) goto out_err; } return; out_err: dev_err(ddata->dev, "%s failed with %i\n", __func__, error); } static irqreturn_t cpcap_charger_irq_thread(int irq, void *data) { struct cpcap_charger_ddata *ddata = data; if (!atomic_read(&ddata->active)) return IRQ_NONE; schedule_delayed_work(&ddata->detect_work, 0); return IRQ_HANDLED; } static int cpcap_usb_init_irq(struct platform_device *pdev, struct cpcap_charger_ddata *ddata, const char *name) { struct cpcap_interrupt_desc *d; int irq, error; irq = platform_get_irq_byname(pdev, name); if (irq < 0) return -ENODEV; error = devm_request_threaded_irq(ddata->dev, irq, NULL, cpcap_charger_irq_thread, IRQF_SHARED, name, ddata); if (error) { dev_err(ddata->dev, "could not get irq %s: %i\n", name, error); return error; } d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL); if (!d) return -ENOMEM; d->name = name; d->irq = irq; list_add(&d->node, &ddata->irq_list); return 0; } static const char * const cpcap_charger_irqs[] = { /* REG_INT_0 */ "chrg_det", "rvrs_chrg", /* REG_INT1 */ "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr1", "vbusvld", /* REG_INT_3 */ "battdetb", }; static int cpcap_usb_init_interrupts(struct platform_device *pdev, struct cpcap_charger_ddata *ddata) { int i, error; for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) { error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]); if (error) return error; } return 0; } static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata) { int i; for (i = 0; i < 2; i++) { ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode", i, GPIOD_OUT_HIGH); if (IS_ERR(ddata->gpio[i])) { dev_info(ddata->dev, "no mode change GPIO%i: %li\n", i, PTR_ERR(ddata->gpio[i])); ddata->gpio[i] = NULL; } } } static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata) { const char * const names[CPCAP_CHARGER_IIO_NR] = { "battdetb", "battp", "vbus", "chg_isense", "batti", }; int error, i; for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) { ddata->channels[i] = devm_iio_channel_get(ddata->dev, names[i]); if (IS_ERR(ddata->channels[i])) { error = PTR_ERR(ddata->channels[i]); goto out_err; } if (!ddata->channels[i]->indio_dev) { error = -ENXIO; goto out_err; } } return 0; out_err: dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n", error); return error; } static const struct power_supply_desc cpcap_charger_usb_desc = { .name = "usb", .type = POWER_SUPPLY_TYPE_USB, .properties = cpcap_charger_props, .num_properties = ARRAY_SIZE(cpcap_charger_props), .get_property = cpcap_charger_get_property, }; #ifdef CONFIG_OF static const struct of_device_id cpcap_charger_id_table[] = { { .compatible = "motorola,mapphone-cpcap-charger", }, {}, }; MODULE_DEVICE_TABLE(of, cpcap_charger_id_table); #endif static int cpcap_charger_probe(struct platform_device *pdev) { struct cpcap_charger_ddata *ddata; const struct of_device_id *of_id; struct power_supply_config psy_cfg = {}; int error; of_id = of_match_device(of_match_ptr(cpcap_charger_id_table), &pdev->dev); if (!of_id) return -EINVAL; ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); if (!ddata) return -ENOMEM; ddata->dev = &pdev->dev; ddata->reg = dev_get_regmap(ddata->dev->parent, NULL); if (!ddata->reg) return -ENODEV; INIT_LIST_HEAD(&ddata->irq_list); INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect); INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work); platform_set_drvdata(pdev, ddata); error = cpcap_charger_init_iio(ddata); if (error) return error; atomic_set(&ddata->active, 1); psy_cfg.of_node = pdev->dev.of_node; psy_cfg.drv_data = ddata; ddata->usb = devm_power_supply_register(ddata->dev, &cpcap_charger_usb_desc, &psy_cfg); if (IS_ERR(ddata->usb)) { error = PTR_ERR(ddata->usb); dev_err(ddata->dev, "failed to register USB charger: %i\n", error); return error; } error = cpcap_usb_init_interrupts(pdev, ddata); if (error) return error; ddata->comparator.set_vbus = cpcap_charger_set_vbus; error = omap_usb2_set_comparator(&ddata->comparator); if (error == -ENODEV) { dev_info(ddata->dev, "charger needs phy, deferring probe\n"); return -EPROBE_DEFER; } cpcap_charger_init_optional_gpios(ddata); schedule_delayed_work(&ddata->detect_work, 0); return 0; } static int cpcap_charger_remove(struct platform_device *pdev) { struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev); int error; atomic_set(&ddata->active, 0); error = omap_usb2_set_comparator(NULL); if (error) dev_warn(ddata->dev, "could not clear USB comparator: %i\n", error); error = cpcap_charger_set_state(ddata, 0, 0, 0); if (error) dev_warn(ddata->dev, "could not clear charger: %i\n", error); cancel_delayed_work_sync(&ddata->vbus_work); cancel_delayed_work_sync(&ddata->detect_work); return 0; } static struct platform_driver cpcap_charger_driver = { .probe = cpcap_charger_probe, .driver = { .name = "cpcap-charger", .of_match_table = of_match_ptr(cpcap_charger_id_table), }, .remove = cpcap_charger_remove, }; module_platform_driver(cpcap_charger_driver); MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:cpcap-charger");
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