Added missing tegra files.HEADmaster

1 files changed, 579 insertions, 0 deletions

diff --git a/drivers/power/max17048_battery.c b/drivers/power/max17048_battery.c
new file mode 100644
index 00000000000..44275e329c5
--- /dev/null
+++ b/drivers/power/max17048_battery.c
@@ -0,0 +1,579 @@
+/*
+ *  max17048_battery.c
+ *  fuel-gauge systems for lithium-ion (Li+) batteries
+ *
+ *  Copyright (C) 2012 Nvidia Cooperation
+ *  Chandler Zhang <chazhang@nvidia.com>
+ *  Syed Rafiuddin <srafiuddin@nvidia.com>
+ *
+ * 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.
+ */
+
+#include <asm/unaligned.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/power_supply.h>
+#include <linux/slab.h>
+#include <linux/max17048_battery.h>
+
+#define MAX17048_VCELL          0x02
+#define MAX17048_SOC            0x04
+#define MAX17048_VER            0x08
+#define MAX17048_HIBRT          0x0A
+#define MAX17048_CONFIG         0x0C
+#define MAX17048_OCV            0x0E
+#define MAX17048_VLRT           0x14
+#define MAX17048_VRESET         0x18
+#define MAX17048_STATUS         0x1A
+#define MAX17048_UNLOCK         0x3E
+#define MAX17048_TABLE          0x40
+#define MAX17048_RCOMPSEG1      0x80
+#define MAX17048_RCOMPSEG2      0x90
+#define MAX17048_CMD            0xFF
+#define MAX17048_UNLOCK_VALUE   0x4a57
+#define MAX17048_RESET_VALUE    0x5400
+#define MAX17048_DELAY          1000
+#define MAX17048_BATTERY_FULL   95
+#define MAX17048_VERSION_NO     0x11
+
+struct max17048_chip {
+        struct i2c_client               *client;
+        struct delayed_work             work;
+        struct power_supply             battery;
+        struct power_supply             ac;
+        struct power_supply             usb;
+        struct max17048_battery_model   *model_data;
+
+        /* State Of Connect */
+        int ac_online;
+        int usb_online;
+        /* battery voltage */
+        int vcell;
+        /* battery capacity */
+        int soc;
+        /* State Of Charge */
+        int status;
+
+        int lasttime_vcell;
+        int lasttime_soc;
+        int lasttime_status;
+};
+
+uint8_t max17048_custom_data[] = {
+        0xAA, 0x00, 0xB1, 0xF0, 0xB7, 0xE0, 0xB9, 0x60, 0xBB, 0x80,
+        0xBC, 0x40, 0xBD, 0x30, 0xBD, 0x50, 0xBD, 0xF0, 0xBE, 0x40,
+        0xBF, 0xD0, 0xC0, 0x90, 0xC4, 0x30, 0xC7, 0xC0, 0xCA, 0x60,
+        0xCF, 0x30, 0x01, 0x20, 0x09, 0xC0, 0x1F, 0xC0, 0x2B, 0xE0,
+        0x4F, 0xC0, 0x30, 0x00, 0x47, 0x80, 0x4F, 0xE0, 0x77, 0x00,
+        0x15, 0x60, 0x46, 0x20, 0x13, 0x80, 0x1A, 0x60, 0x12, 0x20,
+        0x14, 0xA0, 0x14, 0xA0};
+
+static int max17048_write_word(struct i2c_client *client, int reg, u16 value)
+{
+        int ret;
+
+        ret = i2c_smbus_write_word_data(client, reg, swab16(value));
+
+        if (ret < 0)
+                dev_err(&client->dev, "%s(): Failed in writing register"
+                                        "0x%02x err %d\n", __func__, reg, ret);
+
+        return ret;
+}
+
+static uint16_t max17048_read_word(struct i2c_client *client, int reg)
+{
+        uint16_t ret;
+
+        ret = i2c_smbus_read_word_data(client, reg);
+
+        if (ret < 0)
+                dev_err(&client->dev, "%s(): Failed in reading register"
+                                        "0x%02x err %d\n", __func__, reg, ret);
+
+        return swab16(ret);
+}
+
+static int max17048_get_property(struct power_supply *psy,
+                            enum power_supply_property psp,
+                            union power_supply_propval *val)
+{
+        struct max17048_chip *chip = container_of(psy,
+                                struct max17048_chip, battery);
+
+        switch (psp) {
+        case POWER_SUPPLY_PROP_STATUS:
+                val->intval = chip->status;
+                break;
+        case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+                val->intval = chip->vcell;
+                break;
+        case POWER_SUPPLY_PROP_CAPACITY:
+                val->intval = chip->soc;
+                break;
+        default:
+        return -EINVAL;
+        }
+        return 0;
+}
+
+static int max17048_ac_get_property(struct power_supply *psy,
+                                enum power_supply_property psp,
+                                union power_supply_propval *val)
+{
+        struct max17048_chip *chip = container_of(psy,
+                                struct max17048_chip, ac);
+
+        if (psp == POWER_SUPPLY_PROP_ONLINE)
+                val->intval = chip->ac_online;
+        else
+                return -EINVAL;
+
+        return 0;
+}
+
+static int max17048_usb_get_property(struct power_supply *psy,
+                                enum power_supply_property psp,
+                                union power_supply_propval *val)
+{
+        struct max17048_chip *chip = container_of(psy,
+                                        struct max17048_chip, usb);
+
+        if (psp == POWER_SUPPLY_PROP_ONLINE)
+                val->intval = chip->usb_online;
+        else
+                return -EINVAL;
+
+        return 0;
+}
+
+static void max17048_get_vcell(struct i2c_client *client)
+{
+        struct max17048_chip *chip = i2c_get_clientdata(client);
+        uint16_t vcell;
+
+        vcell = max17048_read_word(client, MAX17048_VCELL);
+        if (vcell < 0)
+                dev_err(&client->dev, "%s: err %d\n", __func__, vcell);
+
+        chip->vcell = vcell;
+}
+
+static void max17048_get_soc(struct i2c_client *client)
+{
+        struct max17048_chip *chip = i2c_get_clientdata(client);
+        uint16_t soc;
+
+        soc = max17048_read_word(client, MAX17048_SOC);
+        if (soc < 0)
+                dev_err(&client->dev, "%s: err %d\n", __func__, soc);
+
+        chip->soc = soc >> 9;
+}
+
+static uint16_t max17048_get_version(struct i2c_client *client)
+{
+        return swab16(i2c_smbus_read_word_data(client, MAX17048_VER));
+}
+
+static void max17048_work(struct work_struct *work)
+{
+        struct max17048_chip *chip;
+
+        chip = container_of(work, struct max17048_chip, work.work);
+
+        max17048_get_vcell(chip->client);
+        max17048_get_soc(chip->client);
+
+        if (chip->vcell != chip->lasttime_vcell ||
+                chip->soc != chip->lasttime_soc ||
+                chip->status != chip->lasttime_status) {
+
+                chip->lasttime_vcell = chip->vcell;
+                chip->lasttime_soc = chip->soc;
+
+                power_supply_changed(&chip->battery);
+        }
+        schedule_delayed_work(&chip->work, MAX17048_DELAY);
+}
+
+static void max17048_battery_status(enum charging_states status,
+                                enum charger_type chrg_type, void *data)
+{
+        struct max17048_chip *chip = data;
+
+        chip->ac_online = 0;
+        chip->usb_online = 0;
+
+        if (chrg_type == AC)
+                chip->ac_online = 1;
+        else if (chrg_type == USB)
+                chip->usb_online = 1;
+
+        if (status == progress)
+                chip->status = POWER_SUPPLY_STATUS_CHARGING;
+        else
+                chip->status = POWER_SUPPLY_STATUS_DISCHARGING;
+
+        if (chip->soc > MAX17048_BATTERY_FULL)
+                        chip->status = POWER_SUPPLY_STATUS_FULL;
+
+        power_supply_changed(&chip->battery);
+        power_supply_changed(&chip->usb);
+        power_supply_changed(&chip->ac);
+}
+
+static enum power_supply_property max17048_battery_props[] = {
+        POWER_SUPPLY_PROP_STATUS,
+        POWER_SUPPLY_PROP_VOLTAGE_NOW,
+        POWER_SUPPLY_PROP_CAPACITY,
+};
+
+static enum power_supply_property max17048_ac_props[] = {
+        POWER_SUPPLY_PROP_ONLINE,
+};
+
+static enum power_supply_property max17048_usb_props[] = {
+        POWER_SUPPLY_PROP_ONLINE,
+};
+
+static int max17048_write_rcomp_seg(struct i2c_client *client,
+                                                uint16_t rcomp_seg)
+{
+        uint8_t rs1, rs2;
+        int ret;
+
+        rs2 = rcomp_seg | 0x00FF;
+        rs1 = rcomp_seg >> 8;
+        uint8_t rcomp_seg_table[16] = { rs1, rs2, rs1, rs2,
+                                        rs1, rs2, rs1, rs2,
+                                        rs1, rs2, rs1, rs2,
+                                        rs1, rs2, rs1, rs2};
+
+        ret = i2c_smbus_write_i2c_block_data(client, MAX17048_RCOMPSEG1,
+                                16, (uint8_t *)rcomp_seg_table);
+        if (ret < 0) {
+                dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+                return ret;
+        }
+
+        ret = i2c_smbus_write_i2c_block_data(client, MAX17048_RCOMPSEG2,
+                                16, (uint8_t *)rcomp_seg_table);
+        if (ret < 0) {
+                dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+                return ret;
+        }
+
+        return 0;
+}
+
+static int max17048_load_model_data(struct max17048_chip *chip)
+{
+        struct i2c_client *client = chip->client;
+        struct max17048_battery_model *mdata = chip->model_data;
+        uint16_t soc_tst, ocv;
+        int i, ret = 0;
+
+        /* read OCV */
+        ocv = max17048_read_word(client, MAX17048_OCV);
+        if (ocv == 0xffff) {
+                dev_err(&client->dev, "%s: Failed in unlocking"
+                                        "max17048 err: %d\n", __func__, ocv);
+                return -1;
+        }
+
+        /* write custom model data */
+        for (i = 0; i < 4; i += 1) {
+                if (i2c_smbus_write_i2c_block_data(client,
+                        (MAX17048_TABLE+i*16), 16,
+                                &max17048_custom_data[i*0x10]) < 0) {
+                        dev_err(&client->dev, "%s: error writing model data:\n",
+                                                                __func__);
+                        return -1;
+                }
+        }
+
+        /* Write OCV Test value */
+        ret = max17048_write_word(client, MAX17048_OCV, mdata->ocvtest);
+        if (ret < 0)
+                return ret;
+
+        ret = max17048_write_rcomp_seg(client, mdata->rcomp_seg);
+        if (ret < 0)
+                return ret;
+
+        /* Disable hibernate */
+        ret = max17048_write_word(client, MAX17048_HIBRT, 0x0000);
+        if (ret < 0)
+                return ret;
+
+        /* Lock model access */
+        ret = max17048_write_word(client, MAX17048_UNLOCK, 0x0000);
+        if (ret < 0)
+                return ret;
+
+        /* Delay between 150ms to 600ms */
+        mdelay(200);
+
+        /* Read SOC Register and compare to expected result */
+        soc_tst = max17048_read_word(client, MAX17048_SOC);
+        if (!((soc_tst >> 8) >= mdata->soccheck_A &&
+                                (soc_tst >> 8) <=  mdata->soccheck_B)) {
+                dev_err(&client->dev, "%s: soc comparison failed %d\n",
+                                        __func__, ret);
+                return ret;
+        } else {
+                dev_info(&client->dev, "MAX17048 Custom data"
+                                                " loading successfull\n");
+        }
+
+        /* unlock model access */
+        ret = max17048_write_word(client, MAX17048_UNLOCK,
+                                        MAX17048_UNLOCK_VALUE);
+        if (ret < 0)
+                return ret;
+
+        /* Restore OCV */
+        ret = max17048_write_word(client, MAX17048_OCV, ocv);
+        if (ret < 0)
+                return ret;
+
+        return ret;
+}
+
+static int max17048_initialize(struct max17048_chip *chip)
+{
+        uint8_t ret, config, status;
+        uint16_t wrt_status;
+        struct i2c_client *client = chip->client;
+        struct max17048_battery_model *mdata = chip->model_data;
+
+        /* unlock model access */
+        ret = max17048_write_word(client, MAX17048_UNLOCK,
+                        MAX17048_UNLOCK_VALUE);
+        if (ret < 0)
+                return ret;
+
+        /* load model data */
+        ret = max17048_load_model_data(chip);
+        if (ret < 0) {
+                dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+                return ret;
+        }
+
+        if (mdata->bits == 19)
+                config = 32 - (mdata->alert_threshold * 2);
+        else if (mdata->bits == 18)
+                config = 32 - mdata->alert_threshold;
+
+        config = mdata->one_percent_alerts | config;
+
+        ret = max17048_write_word(client, MAX17048_CONFIG,
+                        ((mdata->rcomp << 8) | config));
+        if (ret < 0)
+                return ret;
+
+        /* Voltage Alert configuration */
+        ret = max17048_write_word(client, MAX17048_VLRT, mdata->valert);
+        if (ret < 0)
+                return ret;
+
+        /* Hibernate configuration */
+        ret = max17048_write_word(client, MAX17048_HIBRT, mdata->hibernate);
+        if (ret < 0)
+                return ret;
+
+        ret = max17048_write_word(client, MAX17048_VRESET, mdata->vreset);
+        if (ret < 0)
+                return ret;
+
+        /* clears the reset indicator */
+        ret = max17048_read_word(client, MAX17048_STATUS);
+        if (ret < 0)
+                return ret;
+
+        /* Sets the EnVR bit if selected */
+        status = (ret & 0xFE) | mdata->alert_on_reset;
+        wrt_status = status << 8;
+
+        ret = max17048_write_word(client, MAX17048_STATUS, wrt_status);
+        if (ret < 0)
+                return ret;
+
+        /* Lock model access */
+        ret = max17048_write_word(client, MAX17048_UNLOCK, 0x0000);
+        if (ret < 0)
+                return ret;
+
+        /* Add delay */
+        mdelay(200);
+        return 0;
+}
+
+static int __devinit max17048_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        struct max17048_chip *chip;
+        int ret;
+        uint16_t version;
+
+        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+        if (!chip)
+                return -ENOMEM;
+
+        chip->client = client;
+        chip->model_data = client->dev.platform_data;
+        chip->ac_online = 0;
+        chip->usb_online = 0;
+
+        i2c_set_clientdata(client, chip);
+
+        version = max17048_get_version(client);
+        if (version != MAX17048_VERSION_NO) {
+                ret = -ENODEV;
+                goto error2;
+        }
+        dev_info(&client->dev, "MAX17048 Fuel-Gauge Ver 0x%x\n", version);
+
+        ret = max17048_initialize(chip);
+        if (ret < 0) {
+                dev_err(&client->dev, "Error: Initializing fuel-gauge\n");
+                goto error2;
+        }
+
+        ret = register_callback(max17048_battery_status, chip);
+        if (ret < 0)
+                goto error2;
+
+        chip->battery.name              = "battery";
+        chip->battery.type              = POWER_SUPPLY_TYPE_BATTERY;
+        chip->battery.get_property      = max17048_get_property;
+        chip->battery.properties        = max17048_battery_props;
+        chip->battery.num_properties    = ARRAY_SIZE(max17048_battery_props);
+
+        ret = power_supply_register(&client->dev, &chip->battery);
+        if (ret) {
+                dev_err(&client->dev, "failed: power supply register\n");
+                goto error2;
+        }
+
+        chip->ac.name           = "maxim-ac";
+        chip->ac.type           = POWER_SUPPLY_TYPE_MAINS;
+        chip->ac.get_property   = max17048_ac_get_property;
+        chip->ac.properties     = max17048_ac_props;
+        chip->ac.num_properties = ARRAY_SIZE(max17048_ac_props);
+
+        ret = power_supply_register(&client->dev, &chip->ac);
+        if (ret) {
+                dev_err(&client->dev, "failed: power supply register\n");
+                goto error1;
+        }
+
+        chip->usb.name          = "maxim-usb";
+        chip->usb.type          = POWER_SUPPLY_TYPE_USB;
+        chip->usb.get_property  = max17048_usb_get_property;
+        chip->usb.properties    = max17048_usb_props;
+        chip->usb.num_properties        = ARRAY_SIZE(max17048_usb_props);
+
+        ret = power_supply_register(&client->dev, &chip->usb);
+        if (ret) {
+                dev_err(&client->dev, "failed: power supply register\n");
+                goto error;
+        }
+
+        INIT_DELAYED_WORK_DEFERRABLE(&chip->work, max17048_work);
+        schedule_delayed_work(&chip->work, MAX17048_DELAY);
+
+        ret = update_charger_status();
+        if (ret) {
+                dev_err(&client->dev, "failed: update_charger_status\n");
+                goto error;
+        }
+
+        return 0;
+error:
+        power_supply_unregister(&chip->ac);
+error1:
+        power_supply_unregister(&chip->battery);
+error2:
+        kfree(chip);
+        return ret;
+}
+
+static int __devexit max17048_remove(struct i2c_client *client)
+{
+        struct max17048_chip *chip = i2c_get_clientdata(client);
+
+        power_supply_unregister(&chip->battery);
+        power_supply_unregister(&chip->usb);
+        power_supply_unregister(&chip->ac);
+        cancel_delayed_work(&chip->work);
+        kfree(chip);
+        return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int max17048_suspend(struct i2c_client *client,
+                pm_message_t state)
+{
+        struct max17048_chip *chip = i2c_get_clientdata(client);
+
+        cancel_delayed_work(&chip->work);
+        return 0;
+}
+
+static int max17048_resume(struct i2c_client *client)
+{
+        struct max17048_chip *chip = i2c_get_clientdata(client);
+
+        schedule_delayed_work(&chip->work, MAX17048_DELAY);
+        return 0;
+}
+
+#else
+
+#define max17048_suspend NULL
+#define max17048_resume NULL
+
+#endif /* CONFIG_PM */
+
+static const struct i2c_device_id max17048_id[] = {
+        { "max17048", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, max17048_id);
+
+static struct i2c_driver max17048_i2c_driver = {
+        .driver = {
+                .name   = "max17048",
+        },
+        .probe          = max17048_probe,
+        .remove         = __devexit_p(max17048_remove),
+        .suspend        = max17048_suspend,
+        .resume         = max17048_resume,
+        .id_table       = max17048_id,
+};
+
+static int __init max17048_init(void)
+{
+        return i2c_add_driver(&max17048_i2c_driver);
+}
+module_init(max17048_init);
+
+static void __exit max17048_exit(void)
+{
+        i2c_del_driver(&max17048_i2c_driver);
+}
+module_exit(max17048_exit);
+
+MODULE_AUTHOR("Chandler Zhang <chazhang@nvidia.com>");
+MODULE_DESCRIPTION("MAX17048 Fuel Gauge");
+MODULE_LICENSE("GPL");