Fixed MTP to work with TWRP

drivers/regulator/max77833.c

@@ -0,0 +1,678 @@
+/*
+ * max77833.c - Regulator driver for the Maxim 77833
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * Sukdong Kim <sukdong.kim@smasung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * This driver is based on max8997.c
+ */
+
+#include <linux/module.h>
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/mfd/max77833.h>
+#include <linux/mfd/max77833-private.h>
+#include <linux/regulator/of_regulator.h>
+
+/* MAX77833 regulator IDs */
+enum max77833_regulators {
+	MAX77833_SAFEOUT1 = 0,
+	MAX77833_SAFEOUT2,
+
+	MAX77833_REG_MAX,
+};
+
+struct max77833_data {
+	struct device *dev;
+	struct max77833_dev *iodev;
+	int num_regulators;
+	struct regulator_dev **rdev;
+
+	u8 saved_states[MAX77833_REG_MAX];
+};
+
+struct voltage_map_desc {
+	int min;
+	int max;
+	int step;
+	unsigned int n_bits;
+};
+
+/* current map in mA */
+static const struct voltage_map_desc charger_current_map_desc = {
+	.min = 60, .max = 2580, .step = 20, .n_bits = 7,
+};
+
+static const struct voltage_map_desc topoff_current_map_desc = {
+	.min = 50, .max = 200, .step = 10, .n_bits = 4,
+};
+
+static const struct voltage_map_desc *reg_voltage_map[] = {
+	[MAX77833_SAFEOUT1] = NULL,
+	[MAX77833_SAFEOUT2] = NULL,
+};
+
+int max77833_regulator_update_reg
+		(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
+{
+	u8 val_before = -1, val_after = -1;
+	int ret;
+
+	max77833_read_reg(i2c, reg, &val_before);
+
+	ret = max77833_update_reg(i2c, reg, val, mask);
+	if (ret)
+		pr_err("%s: fail to update reg(%d)\n", __func__, ret);
+
+	max77833_read_reg(i2c, reg, &val_after);
+
+	pr_info("%s: reg(0x%02x): [0x%02x]+[0x%02x]:[mask 0x%02x]->[0x%02x]\n",
+		__func__, reg, val_before, val, mask, val_after);
+
+	return ret;
+}
+
+static inline int max77833_get_rid(struct regulator_dev *rdev)
+{
+	if (!rdev)
+		return -ENODEV;
+
+	if (!rdev->desc)
+		return -ENODEV;
+
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	return rdev_get_id(rdev);
+}
+
+static bool max77833_regulator_check_disable(struct regulator_dev *rdev)
+{
+	int rid = max77833_get_rid(rdev);
+	bool ret = false;
+
+	switch(rid) {
+	case MAX77833_SAFEOUT1:
+		ret = is_muic_usb_path_ap_usb();
+		break;
+	case MAX77833_SAFEOUT2:
+		ret = is_muic_usb_path_cp_usb();
+		break;
+	default:
+		pr_err("%s: invalid value rid(%d)\n", __func__, rid);
+		break;
+	}
+
+	if (ret) {
+		pr_info("%s: cannot disable regulator(%d)\n", __func__, rid);
+		return false;
+	}
+
+	return true;
+}
+
+static int max77833_list_voltage_safeout(struct regulator_dev *rdev,
+					 unsigned int selector)
+{
+	int rid = max77833_get_rid(rdev);
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	if (rid == MAX77833_SAFEOUT1 || rid == MAX77833_SAFEOUT2) {
+		switch (selector) {
+		case 0:
+			return 4850000;
+		case 1:
+			return 4900000;
+		case 2:
+			return 4950000;
+		case 3:
+			return 3300000;
+		default:
+			return -EINVAL;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int max77833_get_enable_register(struct regulator_dev *rdev,
+					int *reg, int *mask, int *pattern)
+{
+	int rid = max77833_get_rid(rdev);
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	switch (rid) {
+	case MAX77833_SAFEOUT1...MAX77833_SAFEOUT2:
+		*reg = MAX77833_PMIC_REG_SAFEOUT_CTRL;
+		*mask = 0x40 << (rid - MAX77833_SAFEOUT1);
+		*pattern = 0x40 << (rid - MAX77833_SAFEOUT1);
+		break;
+	default:
+		/* Not controllable or not exists */
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int max77833_get_disable_register(struct regulator_dev *rdev,
+					int *reg, int *mask, int *pattern)
+{
+	int rid = max77833_get_rid(rdev);
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+
+	switch (rid) {
+	case MAX77833_SAFEOUT1...MAX77833_SAFEOUT2:
+		*reg = MAX77833_PMIC_REG_SAFEOUT_CTRL;
+		*mask = 0x40 << (rid - MAX77833_SAFEOUT1);
+		*pattern = 0x00;
+		break;
+	default:
+		/* Not controllable or not exists */
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int max77833_reg_is_enabled(struct regulator_dev *rdev)
+{
+	struct max77833_data *max77833 = rdev_get_drvdata(rdev);
+	struct i2c_client *i2c = max77833->iodev->i2c;
+	int ret, reg, mask, pattern;
+	u8 val;
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	ret = max77833_get_enable_register(rdev, &reg, &mask, &pattern);
+	if (ret == -EINVAL)
+		return 1;	/* "not controllable" */
+	else if (ret)
+		return ret;
+
+	ret = max77833_read_reg(i2c, reg, &val);
+	if (ret)
+		return ret;
+
+	return (val & mask) == pattern;
+}
+
+static int max77833_reg_enable(struct regulator_dev *rdev)
+{
+	struct max77833_data *max77833 = rdev_get_drvdata(rdev);
+	struct i2c_client *i2c = max77833->iodev->i2c;
+	int ret, reg, mask, pattern;
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	ret = max77833_get_enable_register(rdev, &reg, &mask, &pattern);
+	if (ret)
+		return ret;
+
+	return max77833_regulator_update_reg(i2c, reg, pattern, mask);
+}
+
+static int max77833_reg_disable(struct regulator_dev *rdev)
+{
+	struct max77833_data *max77833 = rdev_get_drvdata(rdev);
+	struct i2c_client *i2c = max77833->iodev->i2c;
+	int ret, reg, mask, pattern;
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+
+	if (!max77833_regulator_check_disable(rdev))
+		return -EINVAL;
+
+	ret = max77833_get_disable_register(rdev, &reg, &mask, &pattern);
+	if (ret)
+		return ret;
+
+	return max77833_regulator_update_reg(i2c, reg, pattern, mask);
+}
+
+static int max77833_get_voltage_register(struct regulator_dev *rdev,
+					 int *_reg, int *_shift, int *_mask)
+{
+	int rid;
+	int reg, shift = 0, mask = 0x3f;
+
+	if (!rdev)
+		return -EINVAL;
+
+	rid = max77833_get_rid(rdev);
+
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	switch (rid) {
+	case MAX77833_SAFEOUT1...MAX77833_SAFEOUT2:
+		reg = MAX77833_PMIC_REG_SAFEOUT_CTRL;
+		shift = (rid == MAX77833_SAFEOUT2) ? 2 : 0;
+		mask = 0x3;
+		break;
+	default:
+		pr_err("%s: invalid value(%d)\n", __func__, rid);
+		return -EINVAL;
+	}
+
+	*_reg = reg;
+	*_shift = shift;
+	*_mask = mask;
+
+	return 0;
+}
+
+static int max77833_list_voltage(struct regulator_dev *rdev,
+				 unsigned int selector)
+{
+	const struct voltage_map_desc *desc;
+	int rid = max77833_get_rid(rdev);
+	int val;
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+
+	if (rid >= ARRAY_SIZE(reg_voltage_map) || rid < 0)
+		return -EINVAL;
+
+	desc = reg_voltage_map[rid];
+	if (desc == NULL)
+		return -EINVAL;
+
+	val = desc->min + desc->step * selector;
+	if (val > desc->max)
+		return -EINVAL;
+
+	return val * 1000;
+}
+
+static int max77833_get_voltage(struct regulator_dev *rdev)
+{
+	struct max77833_data *max77833;
+	struct i2c_client *i2c;
+	int reg, shift, mask, ret;
+
+	u8 val;
+
+	if (!rdev)
+		return -1;
+
+	max77833 = rdev_get_drvdata(rdev);
+	i2c = max77833->iodev->i2c;
+
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	ret = max77833_get_voltage_register(rdev, &reg, &shift, &mask);
+	if (ret)
+		return ret;
+
+	ret = max77833_read_reg(i2c, reg, &val);
+	if (ret)
+		return ret;
+
+	val >>= shift;
+	val &= mask;
+
+	if (rdev->desc && rdev->desc->ops && rdev->desc->ops->list_voltage)
+		return rdev->desc->ops->list_voltage(rdev, val);
+
+	/*
+	 * max77833_list_voltage returns value for any rdev with voltage_map,
+	 * which works for "CHARGER" and "CHARGER TOPOFF" that do not have
+	 * list_voltage ops (they are current regulators).
+	 */
+	return max77833_list_voltage(rdev, val);
+}
+
+static inline int max77833_get_voltage_proper_val(
+		const struct voltage_map_desc *desc,
+		int min_vol, int max_vol)
+{
+	int i = 0;
+
+	if (desc == NULL)
+		return -EINVAL;
+
+	if (max_vol < desc->min || min_vol > desc->max)
+		return -EINVAL;
+
+	while (desc->min + desc->step * i < min_vol &&
+			desc->min + desc->step * i < desc->max)
+		i++;
+
+	if (desc->min + desc->step * i > max_vol)
+		return -EINVAL;
+
+	if (i >= (1 << desc->n_bits))
+		return -EINVAL;
+
+	return i;
+}
+
+static const int safeoutvolt[] = {
+	3300000,
+	4850000,
+	4900000,
+	4950000,
+};
+
+/* For SAFEOUT1 and SAFEOUT2 */
+static int max77833_set_voltage_safeout(struct regulator_dev *rdev,
+					int min_uV, int max_uV,
+					unsigned *selector)
+{
+	struct max77833_data *max77833 = rdev_get_drvdata(rdev);
+	struct i2c_client *i2c = max77833->iodev->i2c;
+	int rid = max77833_get_rid(rdev);
+	int reg, shift = 0, mask, ret;
+	int i = 0;
+	u8 val;
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+
+	if (rid != MAX77833_SAFEOUT1 && rid != MAX77833_SAFEOUT2)
+		return -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(safeoutvolt); i++) {
+		if (min_uV <= safeoutvolt[i] && max_uV >= safeoutvolt[i])
+			break;
+	}
+
+	if (i >= ARRAY_SIZE(safeoutvolt))
+		return -EINVAL;
+
+	if (i == 0)
+		val = 0x3;
+	else
+		val = i - 1;
+
+	ret = max77833_get_voltage_register(rdev, &reg, &shift, &mask);
+	if (ret)
+		return ret;
+
+	ret = max77833_regulator_update_reg(i2c, reg, val << shift, mask << shift);
+
+	*selector = val;
+
+	return ret;
+}
+
+static int max77833_reg_enable_suspend(struct regulator_dev *rdev)
+{
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	return 0;
+}
+
+static int max77833_reg_disable_suspend(struct regulator_dev *rdev)
+{
+	struct max77833_data *max77833 = rdev_get_drvdata(rdev);
+	struct i2c_client *i2c = max77833->iodev->i2c;
+	int ret, reg, mask, pattern;
+	int rid = max77833_get_rid(rdev);
+	dev_info(&rdev->dev, "func:%s\n", __func__);
+	ret = max77833_get_disable_register(rdev, &reg, &mask, &pattern);
+	if (ret)
+		return ret;
+
+	if (rid != MAX77833_SAFEOUT1 && rid != MAX77833_SAFEOUT2)
+		return -EINVAL;
+
+	max77833_read_reg(i2c, reg, &max77833->saved_states[rid]);
+
+	dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
+		rdev->desc->name, max77833->saved_states[rid] & mask,
+		(~pattern) & mask);
+	return max77833_regulator_update_reg(i2c, reg, pattern, mask);
+}
+
+static struct regulator_ops max77833_safeout_ops = {
+	.list_voltage = max77833_list_voltage_safeout,
+	.is_enabled = max77833_reg_is_enabled,
+	.enable = max77833_reg_enable,
+	.disable = max77833_reg_disable,
+	.get_voltage = max77833_get_voltage,
+	.set_voltage = max77833_set_voltage_safeout,
+	.set_suspend_enable = max77833_reg_enable_suspend,
+	.set_suspend_disable = max77833_reg_disable_suspend,
+};
+
+static struct regulator_desc regulators[] = {
+	{
+		.name = "ESAFEOUT1",
+		.id = MAX77833_SAFEOUT1,
+		.ops = &max77833_safeout_ops,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+	}, {
+		.name = "ESAFEOUT2",
+		.id = MAX77833_SAFEOUT2,
+		.ops = &max77833_safeout_ops,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+	},
+};
+
+static struct regulator_consumer_supply safeout1_supply[] = {
+	REGULATOR_SUPPLY("safeout1", NULL),
+};
+
+static struct regulator_consumer_supply safeout2_supply[] = {
+	REGULATOR_SUPPLY("safeout2", NULL),
+};
+
+#if defined(CONFIG_OF)
+
+#define max77833_init_consumer_supplies(p_data, r_init_data, id)			\
+	(r_init_data) = (p_data)->regulators[MAX77833_SAFEOUT##id].initdata;		\
+	(r_init_data)->constraints.state_mem.enabled = 1;				\
+	(r_init_data)->num_consumer_supplies = ARRAY_SIZE(safeout## id ##_supply);	\
+	(r_init_data)->consumer_supplies = safeout## id ##_supply;
+
+static int max77833_pmic_dt_parse_pdata(struct platform_device *pdev,
+					struct max77833_platform_data *pdata)
+{
+	struct max77833_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+	struct device_node *pmic_np, *regulators_np, *reg_np;
+	struct max77833_regulator_data *rdata;
+	struct regulator_init_data *r_initdata;
+
+	unsigned int i;
+
+	pmic_np = of_node_get(iodev->dev->of_node);
+	if (!pmic_np) {
+		dev_err(&pdev->dev, "could not find pmic sub-node\n");
+		return -ENODEV;
+	}
+
+	regulators_np = of_find_node_by_name(pmic_np, "regulators");
+	if (!regulators_np) {
+		dev_err(&pdev->dev, "could not find regulators sub-node\n");
+		return -EINVAL;
+	}
+
+	/* count the number of regulators to be supported in pmic */
+	pdata->num_regulators = 0;
+
+	for_each_child_of_node(regulators_np, reg_np) {
+		pdata->num_regulators++;
+	}
+
+	rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
+				pdata->num_regulators, GFP_KERNEL);
+	if (!rdata) {
+		of_node_put(regulators_np);
+		dev_err(&pdev->dev, "could not allocate memory for regulator data\n");
+		return -ENOMEM;
+	}
+
+	pdata->regulators = rdata;
+
+	for_each_child_of_node(regulators_np, reg_np) {
+		for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+			if (!of_node_cmp(reg_np->name, regulators[i].name))
+				break;
+		}
+
+		if (i == ARRAY_SIZE(regulators)) {
+			dev_warn(&pdev->dev, "don't know how to configure regulator %s\n",
+				 reg_np->name);
+			continue;
+		}
+
+		rdata->id = i;
+		rdata->initdata = of_get_regulator_init_data(&pdev->dev, reg_np);
+		rdata->reg_node = reg_np;
+		rdata++;
+	}
+	of_node_put(regulators_np);
+
+	/* original shelve source */
+	max77833_init_consumer_supplies(pdata, r_initdata, 1);
+	max77833_init_consumer_supplies(pdata, r_initdata, 2);
+
+	return 0;
+}
+#else
+static int max77833_pmic_dt_parse_pdata(struct platform_device *pdev,
+					struct max77833_platform_data *pdata)
+{
+	return 0;
+}
+#endif /* CONFIG_OF */
+
+static __devinit int max77833_pmic_probe(struct platform_device *pdev)
+{
+	struct max77833_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+	struct max77833_platform_data *pdata = dev_get_platdata(iodev->dev);
+	struct regulator_config config = { };
+	struct regulator_dev **rdev;
+	struct max77833_data *max77833;
+	struct i2c_client *i2c;
+	int i, ret, size;
+
+	dev_info(&pdev->dev, "%s\n", __func__);
+	if (!pdata) {
+		pr_info("[%s:%d] !pdata\n", __FILE__, __LINE__);
+		dev_err(pdev->dev.parent, "No platform init data supplied.\n");
+		return -ENODEV;
+	}
+
+	if (iodev->dev->of_node) {
+		ret = max77833_pmic_dt_parse_pdata(pdev, pdata);
+		if (ret)
+			return ret;
+	}
+
+	max77833 = devm_kzalloc(&pdev->dev, sizeof(struct max77833_data),
+				GFP_KERNEL);
+	if (!max77833) {
+		pr_info("[%s:%d] if (!max77833)\n", __FILE__, __LINE__);
+		return -ENOMEM;
+	}
+	size = sizeof(struct regulator_dev *) * pdata->num_regulators;
+	max77833->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+	if (!max77833->rdev) {
+		pr_info("[%s:%d] if (!max77833->rdev)\n", __FILE__, __LINE__);
+		kfree(max77833);
+		return -ENOMEM;
+	}
+
+	rdev = max77833->rdev;
+	max77833->dev = &pdev->dev;
+	max77833->iodev = iodev;
+	max77833->num_regulators = pdata->num_regulators;
+	platform_set_drvdata(pdev, max77833);
+	i2c = max77833->iodev->i2c;
+	pr_info("[%s:%d] pdata->num_regulators:%d\n", __FILE__, __LINE__,
+		pdata->num_regulators);
+
+	for (i = 0; i < pdata->num_regulators; i++) {
+
+		const struct voltage_map_desc *desc;
+		int id = pdata->regulators[i].id;
+		pr_info("[%s:%d] for in pdata->num_regulators:%d\n", __FILE__,
+			__LINE__, pdata->num_regulators);
+		desc = reg_voltage_map[id];
+		if (id == MAX77833_SAFEOUT1 || id == MAX77833_SAFEOUT2)
+			regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt);
+
+		config.dev = max77833->dev;
+		config.init_data = pdata->regulators[i].initdata;
+		config.driver_data = max77833;
+		config.of_node = pdata->regulators[i].reg_node;
+
+		rdev[i] = regulator_register(&regulators[id], &config);
+		if (IS_ERR(rdev[i])) {
+			ret = PTR_ERR(rdev[i]);
+			dev_err(max77833->dev, "regulator init failed for %d\n",
+				id);
+			rdev[i] = NULL;
+			goto err;
+		}
+	}
+
+	return 0;
+ err:
+	pr_info("[%s:%d] err:\n", __FILE__, __LINE__);
+	for (i = 0; i < max77833->num_regulators; i++)
+		if (rdev[i])
+			regulator_unregister(rdev[i]);
+
+	kfree(max77833);
+
+	return ret;
+}
+
+static int __devexit max77833_pmic_remove(struct platform_device *pdev)
+{
+	struct max77833_data *max77833 = platform_get_drvdata(pdev);
+	struct regulator_dev **rdev = max77833->rdev;
+	int i;
+	dev_info(&pdev->dev, "%s\n", __func__);
+	for (i = 0; i < max77833->num_regulators; i++)
+		if (rdev[i])
+			regulator_unregister(rdev[i]);
+
+	kfree(max77833->rdev);
+	kfree(max77833);
+
+	return 0;
+}
+
+static const struct platform_device_id max77833_pmic_id[] = {
+	{"max77833-safeout", 0},
+	{},
+};
+MODULE_DEVICE_TABLE(platform, max77833_pmic_id);
+
+static struct platform_driver max77833_pmic_driver = {
+	.driver = {
+		   .name = "max77833-safeout",
+		   .owner = THIS_MODULE,
+		   },
+	.probe = max77833_pmic_probe,
+	.remove = __devexit_p(max77833_pmic_remove),
+	.id_table = max77833_pmic_id,
+};
+
+static int __init max77833_pmic_init(void)
+{
+	return platform_driver_register(&max77833_pmic_driver);
+}
+subsys_initcall(max77833_pmic_init);
+
+static void __exit max77833_pmic_cleanup(void)
+{
+	platform_driver_unregister(&max77833_pmic_driver);
+}
+
+module_exit(max77833_pmic_cleanup);
+
+MODULE_DESCRIPTION("MAXIM 77833 Regulator Driver");
+MODULE_AUTHOR("Sukdong Kim <Sukdong.Kim@samsung.com>");
+MODULE_LICENSE("GPL");