From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/drivers/power/supply/cpcap-charger.c | 269 +++++++++++++++++++++++++++++++++++++++++++++++++----
1 files changed, 248 insertions(+), 21 deletions(-)
diff --git a/kernel/drivers/power/supply/cpcap-charger.c b/kernel/drivers/power/supply/cpcap-charger.c
index 37be541..891e1eb 100644
--- a/kernel/drivers/power/supply/cpcap-charger.c
+++ b/kernel/drivers/power/supply/cpcap-charger.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Motorola CPCAP PMIC battery charger driver
*
@@ -7,15 +8,6 @@
* 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>
@@ -116,6 +108,9 @@
#define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe)
#define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf)
+/* CPCAP_REG_VUSBC register bits needed for VBUS */
+#define CPCAP_BIT_VBUS_SWITCH BIT(0) /* VBUS boost to 5V */
+
enum {
CPCAP_CHARGER_IIO_BATTDET,
CPCAP_CHARGER_IIO_VOLTAGE,
@@ -123,6 +118,13 @@
CPCAP_CHARGER_IIO_CHRG_CURRENT,
CPCAP_CHARGER_IIO_BATT_CURRENT,
CPCAP_CHARGER_IIO_NR,
+};
+
+enum {
+ CPCAP_CHARGER_DISCONNECTED,
+ CPCAP_CHARGER_DETECTING,
+ CPCAP_CHARGER_CHARGING,
+ CPCAP_CHARGER_DONE,
};
struct cpcap_charger_ddata {
@@ -138,10 +140,13 @@
struct power_supply *usb;
struct phy_companion comparator; /* For USB VBUS */
- bool vbus_enabled;
+ unsigned int vbus_enabled:1;
+ unsigned int feeding_vbus:1;
atomic_t active;
int status;
+ int state;
+ int voltage;
};
struct cpcap_interrupt_desc {
@@ -157,6 +162,7 @@
bool chrg_se1b;
bool rvrs_mode;
+ bool chrgcurr2;
bool chrgcurr1;
bool vbusvld;
@@ -166,24 +172,26 @@
static enum power_supply_property cpcap_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
+/* No battery always shows temperature of -40000 */
static bool cpcap_charger_battery_found(struct cpcap_charger_ddata *ddata)
{
struct iio_channel *channel;
- int error, value;
+ int error, temperature;
channel = ddata->channels[CPCAP_CHARGER_IIO_BATTDET];
- error = iio_read_channel_raw(channel, &value);
+ error = iio_read_channel_processed(channel, &temperature);
if (error < 0) {
dev_warn(ddata->dev, "%s failed: %i\n", __func__, error);
return false;
}
- return value == 1;
+ return temperature > -20000 && temperature < 60000;
}
static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata)
@@ -228,6 +236,9 @@
case POWER_SUPPLY_PROP_STATUS:
val->intval = ddata->status;
break;
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ val->intval = ddata->voltage;
+ break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (ddata->status == POWER_SUPPLY_STATUS_CHARGING)
val->intval = cpcap_charger_get_charge_voltage(ddata) *
@@ -250,6 +261,85 @@
}
return 0;
+}
+
+static int cpcap_charger_match_voltage(int voltage)
+{
+ switch (voltage) {
+ case 0 ... 4100000 - 1: return 3800000;
+ case 4100000 ... 4120000 - 1: return 4100000;
+ case 4120000 ... 4150000 - 1: return 4120000;
+ case 4150000 ... 4170000 - 1: return 4150000;
+ case 4170000 ... 4200000 - 1: return 4170000;
+ case 4200000 ... 4230000 - 1: return 4200000;
+ case 4230000 ... 4250000 - 1: return 4230000;
+ case 4250000 ... 4270000 - 1: return 4250000;
+ case 4270000 ... 4300000 - 1: return 4270000;
+ case 4300000 ... 4330000 - 1: return 4300000;
+ case 4330000 ... 4350000 - 1: return 4330000;
+ case 4350000 ... 4380000 - 1: return 4350000;
+ case 4380000 ... 4400000 - 1: return 4380000;
+ case 4400000 ... 4420000 - 1: return 4400000;
+ case 4420000 ... 4440000 - 1: return 4420000;
+ case 4440000: return 4440000;
+ default: return 0;
+ }
+}
+
+static int
+cpcap_charger_get_bat_const_charge_voltage(struct cpcap_charger_ddata *ddata)
+{
+ union power_supply_propval prop;
+ struct power_supply *battery;
+ int voltage = ddata->voltage;
+ int error;
+
+ battery = power_supply_get_by_name("battery");
+ if (battery) {
+ error = power_supply_get_property(battery,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ &prop);
+ if (!error)
+ voltage = prop.intval;
+
+ power_supply_put(battery);
+ }
+
+ return voltage;
+}
+
+static int cpcap_charger_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent);
+ int voltage, batvolt;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ voltage = cpcap_charger_match_voltage(val->intval);
+ batvolt = cpcap_charger_get_bat_const_charge_voltage(ddata);
+ if (voltage > batvolt)
+ voltage = batvolt;
+ ddata->voltage = voltage;
+ schedule_delayed_work(&ddata->detect_work, 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int cpcap_charger_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return 1;
+ default:
+ return 0;
+ }
}
static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata,
@@ -333,7 +423,6 @@
}
/* VBUS control functions for the USB PHY companion */
-
static void cpcap_charger_vbus_work(struct work_struct *work)
{
struct cpcap_charger_ddata *ddata;
@@ -351,10 +440,17 @@
return;
}
+ ddata->feeding_vbus = true;
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_VUSBC,
+ CPCAP_BIT_VBUS_SWITCH,
+ CPCAP_BIT_VBUS_SWITCH);
if (error)
goto out_err;
@@ -364,6 +460,11 @@
if (error)
goto out_err;
} else {
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_VUSBC,
+ CPCAP_BIT_VBUS_SWITCH, 0);
+ if (error)
+ goto out_err;
+
error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM,
CPCAP_REG_CRM_RVRSMODE, 0);
if (error)
@@ -371,6 +472,7 @@
cpcap_charger_set_cable_path(ddata, true);
cpcap_charger_set_inductive_path(ddata, true);
+ ddata->feeding_vbus = false;
}
return;
@@ -414,6 +516,7 @@
s->chrg_se1b = val & BIT(13);
s->rvrs_mode = val & BIT(6);
+ s->chrgcurr2 = val & BIT(5);
s->chrgcurr1 = val & BIT(4);
s->vbusvld = val & BIT(3);
@@ -424,6 +527,79 @@
s->battdetb = val & BIT(6);
return 0;
+}
+
+static void cpcap_charger_update_state(struct cpcap_charger_ddata *ddata,
+ int state)
+{
+ const char *status;
+
+ if (state > CPCAP_CHARGER_DONE) {
+ dev_warn(ddata->dev, "unknown state: %i\n", state);
+
+ return;
+ }
+
+ ddata->state = state;
+
+ switch (state) {
+ case CPCAP_CHARGER_DISCONNECTED:
+ status = "DISCONNECTED";
+ break;
+ case CPCAP_CHARGER_DETECTING:
+ status = "DETECTING";
+ break;
+ case CPCAP_CHARGER_CHARGING:
+ status = "CHARGING";
+ break;
+ case CPCAP_CHARGER_DONE:
+ status = "DONE";
+ break;
+ default:
+ return;
+ }
+
+ dev_dbg(ddata->dev, "state: %s\n", status);
+}
+
+static int cpcap_charger_voltage_to_regval(int voltage)
+{
+ int offset;
+
+ switch (voltage) {
+ case 0 ... 4100000 - 1:
+ return 0;
+ case 4100000 ... 4200000 - 1:
+ offset = 1;
+ break;
+ case 4200000 ... 4300000 - 1:
+ offset = 0;
+ break;
+ case 4300000 ... 4380000 - 1:
+ offset = -1;
+ break;
+ case 4380000 ... 4440000:
+ offset = -2;
+ break;
+ default:
+ return 0;
+ }
+
+ return ((voltage - 4100000) / 20000) + offset;
+}
+
+static void cpcap_charger_disconnect(struct cpcap_charger_ddata *ddata,
+ int state, unsigned long delay)
+{
+ int error;
+
+ error = cpcap_charger_set_state(ddata, 0, 0, 0);
+ if (error)
+ return;
+
+ cpcap_charger_update_state(ddata, state);
+ power_supply_changed(ddata->usb);
+ schedule_delayed_work(&ddata->detect_work, delay);
}
static void cpcap_usb_detect(struct work_struct *work)
@@ -439,23 +615,70 @@
if (error)
return;
- if (cpcap_charger_vbus_valid(ddata) && s.chrgcurr1) {
+ /* Just init the state if a charger is connected with no chrg_det set */
+ if (!s.chrg_det && s.chrgcurr1 && s.vbusvld) {
+ cpcap_charger_update_state(ddata, CPCAP_CHARGER_DETECTING);
+
+ return;
+ }
+
+ /*
+ * If battery voltage is higher than charge voltage, it may have been
+ * charged to 4.35V by Android. Try again in 10 minutes.
+ */
+ if (cpcap_charger_get_charge_voltage(ddata) > ddata->voltage) {
+ cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DETECTING,
+ HZ * 60 * 10);
+
+ return;
+ }
+
+ /* Delay for 80ms to avoid vbus bouncing when usb cable is plugged in */
+ usleep_range(80000, 120000);
+
+ /* Throttle chrgcurr2 interrupt for charger done and retry */
+ switch (ddata->state) {
+ case CPCAP_CHARGER_CHARGING:
+ if (s.chrgcurr2)
+ break;
+ if (s.chrgcurr1 && s.vbusvld) {
+ cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DONE,
+ HZ * 5);
+ return;
+ }
+ break;
+ case CPCAP_CHARGER_DONE:
+ if (!s.chrgcurr2)
+ break;
+ cpcap_charger_disconnect(ddata, CPCAP_CHARGER_DETECTING,
+ HZ * 5);
+ return;
+ default:
+ break;
+ }
+
+ if (!ddata->feeding_vbus && cpcap_charger_vbus_valid(ddata) &&
+ s.chrgcurr1) {
int max_current;
+ int vchrg;
if (cpcap_charger_battery_found(ddata))
max_current = CPCAP_REG_CRM_ICHRG_1A596;
else
max_current = CPCAP_REG_CRM_ICHRG_0A532;
+ vchrg = cpcap_charger_voltage_to_regval(ddata->voltage);
error = cpcap_charger_set_state(ddata,
- CPCAP_REG_CRM_VCHRG_4V35,
+ CPCAP_REG_CRM_VCHRG(vchrg),
max_current, 0);
if (error)
goto out_err;
+ cpcap_charger_update_state(ddata, CPCAP_CHARGER_CHARGING);
} else {
error = cpcap_charger_set_state(ddata, 0, 0, 0);
if (error)
goto out_err;
+ cpcap_charger_update_state(ddata, CPCAP_CHARGER_DISCONNECTED);
}
power_supply_changed(ddata->usb);
@@ -490,7 +713,7 @@
error = devm_request_threaded_irq(ddata->dev, irq, NULL,
cpcap_charger_irq_thread,
- IRQF_SHARED,
+ IRQF_SHARED | IRQF_ONESHOT,
name, ddata);
if (error) {
dev_err(ddata->dev, "could not get irq %s: %i\n",
@@ -515,7 +738,7 @@
"chrg_det", "rvrs_chrg",
/* REG_INT1 */
- "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr1", "vbusvld",
+ "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr2", "chrgcurr1", "vbusvld",
/* REG_INT_3 */
"battdetb",
@@ -545,7 +768,7 @@
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;
+ ddata->gpio[i] = NULL;
}
}
}
@@ -574,8 +797,9 @@
return 0;
out_err:
- dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
- error);
+ if (error != -EPROBE_DEFER)
+ dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
+ error);
return error;
}
@@ -586,6 +810,8 @@
.properties = cpcap_charger_props,
.num_properties = ARRAY_SIZE(cpcap_charger_props),
.get_property = cpcap_charger_get_property,
+ .set_property = cpcap_charger_set_property,
+ .property_is_writeable = cpcap_charger_property_is_writeable,
};
#ifdef CONFIG_OF
@@ -615,6 +841,7 @@
return -ENOMEM;
ddata->dev = &pdev->dev;
+ ddata->voltage = 4200000;
ddata->reg = dev_get_regmap(ddata->dev->parent, NULL);
if (!ddata->reg)
--
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