1 files changed, 563 insertions, 0 deletions

diff --git a/drivers/mfd/da903x.c b/drivers/mfd/da903x.c
new file mode 100644
index 000000000000..b57326ae464d
--- /dev/null
+++ b/drivers/mfd/da903x.c
@@ -0,0 +1,563 @@
+/*
+ * Base driver for Dialog Semiconductor DA9030/DA9034
+ *
+ * Copyright (C) 2008 Compulab, Ltd.
+ *      Mike Rapoport <mike@compulab.co.il>
+ *
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ *      Eric Miao <eric.miao@marvell.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 <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/mfd/da903x.h>
+
+#define DA9030_CHIP_ID          0x00
+#define DA9030_EVENT_A          0x01
+#define DA9030_EVENT_B          0x02
+#define DA9030_EVENT_C          0x03
+#define DA9030_STATUS           0x04
+#define DA9030_IRQ_MASK_A       0x05
+#define DA9030_IRQ_MASK_B       0x06
+#define DA9030_IRQ_MASK_C       0x07
+#define DA9030_SYS_CTRL_A       0x08
+#define DA9030_SYS_CTRL_B       0x09
+#define DA9030_FAULT_LOG        0x0a
+
+#define DA9034_CHIP_ID          0x00
+#define DA9034_EVENT_A          0x01
+#define DA9034_EVENT_B          0x02
+#define DA9034_EVENT_C          0x03
+#define DA9034_EVENT_D          0x04
+#define DA9034_STATUS_A         0x05
+#define DA9034_STATUS_B         0x06
+#define DA9034_IRQ_MASK_A       0x07
+#define DA9034_IRQ_MASK_B       0x08
+#define DA9034_IRQ_MASK_C       0x09
+#define DA9034_IRQ_MASK_D       0x0a
+#define DA9034_SYS_CTRL_A       0x0b
+#define DA9034_SYS_CTRL_B       0x0c
+#define DA9034_FAULT_LOG        0x0d
+
+struct da903x_chip;
+
+struct da903x_chip_ops {
+        int     (*init_chip)(struct da903x_chip *);
+        int     (*unmask_events)(struct da903x_chip *, unsigned int events);
+        int     (*mask_events)(struct da903x_chip *, unsigned int events);
+        int     (*read_events)(struct da903x_chip *, unsigned int *events);
+        int     (*read_status)(struct da903x_chip *, unsigned int *status);
+};
+
+struct da903x_chip {
+        struct i2c_client       *client;
+        struct device           *dev;
+        struct da903x_chip_ops  *ops;
+
+        int                     type;
+        uint32_t                events_mask;
+
+        struct mutex            lock;
+        struct work_struct      irq_work;
+
+        struct blocking_notifier_head notifier_list;
+};
+
+static inline int __da903x_read(struct i2c_client *client,
+                                int reg, uint8_t *val)
+{
+        int ret;
+
+        ret = i2c_smbus_read_byte_data(client, reg);
+        if (ret < 0) {
+                dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
+                return ret;
+        }
+
+        *val = (uint8_t)ret;
+        return 0;
+}
+
+static inline int __da903x_reads(struct i2c_client *client, int reg,
+                                 int len, uint8_t *val)
+{
+        int ret;
+
+        ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
+        if (ret < 0) {
+                dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
+                return ret;
+        }
+        return 0;
+}
+
+static inline int __da903x_write(struct i2c_client *client,
+                                 int reg, uint8_t val)
+{
+        int ret;
+
+        ret = i2c_smbus_write_byte_data(client, reg, val);
+        if (ret < 0) {
+                dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
+                                val, reg);
+                return ret;
+        }
+        return 0;
+}
+
+static inline int __da903x_writes(struct i2c_client *client, int reg,
+                                  int len, uint8_t *val)
+{
+        int ret;
+
+        ret = i2c_smbus_write_i2c_block_data(client, reg, len, val);
+        if (ret < 0) {
+                dev_err(&client->dev, "failed writings to 0x%02x\n", reg);
+                return ret;
+        }
+        return 0;
+}
+
+int da903x_register_notifier(struct device *dev, struct notifier_block *nb,
+                                unsigned int events)
+{
+        struct da903x_chip *chip = dev_get_drvdata(dev);
+
+        chip->ops->unmask_events(chip, events);
+        return blocking_notifier_chain_register(&chip->notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(da903x_register_notifier);
+
+int da903x_unregister_notifier(struct device *dev, struct notifier_block *nb,
+                                unsigned int events)
+{
+        struct da903x_chip *chip = dev_get_drvdata(dev);
+
+        chip->ops->mask_events(chip, events);
+        return blocking_notifier_chain_unregister(&chip->notifier_list, nb);
+}
+EXPORT_SYMBOL_GPL(da903x_unregister_notifier);
+
+int da903x_write(struct device *dev, int reg, uint8_t val)
+{
+        return __da903x_write(to_i2c_client(dev), reg, val);
+}
+EXPORT_SYMBOL_GPL(da903x_write);
+
+int da903x_read(struct device *dev, int reg, uint8_t *val)
+{
+        return __da903x_read(to_i2c_client(dev), reg, val);
+}
+EXPORT_SYMBOL_GPL(da903x_read);
+
+int da903x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
+{
+        struct da903x_chip *chip = dev_get_drvdata(dev);
+        uint8_t reg_val;
+        int ret = 0;
+
+        mutex_lock(&chip->lock);
+
+        ret = __da903x_read(chip->client, reg, &reg_val);
+        if (ret)
+                goto out;
+
+        if ((reg_val & bit_mask) == 0) {
+                reg_val |= bit_mask;
+                ret = __da903x_write(chip->client, reg, reg_val);
+        }
+out:
+        mutex_unlock(&chip->lock);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(da903x_set_bits);
+
+int da903x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
+{
+        struct da903x_chip *chip = dev_get_drvdata(dev);
+        uint8_t reg_val;
+        int ret = 0;
+
+        mutex_lock(&chip->lock);
+
+        ret = __da903x_read(chip->client, reg, &reg_val);
+        if (ret)
+                goto out;
+
+        if (reg_val & bit_mask) {
+                reg_val &= ~bit_mask;
+                ret = __da903x_write(chip->client, reg, reg_val);
+        }
+out:
+        mutex_unlock(&chip->lock);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(da903x_clr_bits);
+
+int da903x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
+{
+        struct da903x_chip *chip = dev_get_drvdata(dev);
+        uint8_t reg_val;
+        int ret = 0;
+
+        mutex_lock(&chip->lock);
+
+        ret = __da903x_read(chip->client, reg, &reg_val);
+        if (ret)
+                goto out;
+
+        if ((reg_val & mask) != val) {
+                reg_val = (reg_val & ~mask) | val;
+                ret = __da903x_write(chip->client, reg, reg_val);
+        }
+out:
+        mutex_unlock(&chip->lock);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(da903x_update);
+
+int da903x_query_status(struct device *dev, unsigned int sbits)
+{
+        struct da903x_chip *chip = dev_get_drvdata(dev);
+        unsigned int status = 0;
+
+        chip->ops->read_status(chip, &status);
+        return ((status & sbits) == sbits);
+}
+EXPORT_SYMBOL(da903x_query_status);
+
+static int __devinit da9030_init_chip(struct da903x_chip *chip)
+{
+        uint8_t chip_id;
+        int err;
+
+        err = __da903x_read(chip->client, DA9030_CHIP_ID, &chip_id);
+        if (err)
+                return err;
+
+        err = __da903x_write(chip->client, DA9030_SYS_CTRL_A, 0xE8);
+        if (err)
+                return err;
+
+        dev_info(chip->dev, "DA9030 (CHIP ID: 0x%02x) detected\n", chip_id);
+        return 0;
+}
+
+static int da9030_unmask_events(struct da903x_chip *chip, unsigned int events)
+{
+        uint8_t v[3];
+
+        chip->events_mask &= ~events;
+
+        v[0] = (chip->events_mask & 0xff);
+        v[1] = (chip->events_mask >> 8) & 0xff;
+        v[2] = (chip->events_mask >> 16) & 0xff;
+
+        return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
+}
+
+static int da9030_mask_events(struct da903x_chip *chip, unsigned int events)
+{
+        uint8_t v[3];
+
+        chip->events_mask &= ~events;
+
+        v[0] = (chip->events_mask & 0xff);
+        v[1] = (chip->events_mask >> 8) & 0xff;
+        v[2] = (chip->events_mask >> 16) & 0xff;
+
+        return __da903x_writes(chip->client, DA9030_IRQ_MASK_A, 3, v);
+}
+
+static int da9030_read_events(struct da903x_chip *chip, unsigned int *events)
+{
+        uint8_t v[3] = {0, 0, 0};
+        int ret;
+
+        ret = __da903x_reads(chip->client, DA9030_EVENT_A, 3, v);
+        if (ret < 0)
+                return ret;
+
+        *events = (v[2] << 16) | (v[1] << 8) | v[0];
+        return 0;
+}
+
+static int da9030_read_status(struct da903x_chip *chip, unsigned int *status)
+{
+        return __da903x_read(chip->client, DA9030_STATUS, (uint8_t *)status);
+}
+
+static int da9034_init_chip(struct da903x_chip *chip)
+{
+        uint8_t chip_id;
+        int err;
+
+        err = __da903x_read(chip->client, DA9034_CHIP_ID, &chip_id);
+        if (err)
+                return err;
+
+        err = __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0xE8);
+        if (err)
+                return err;
+
+        /* avoid SRAM power off during sleep*/
+        __da903x_write(chip->client, 0x10, 0x07);
+        __da903x_write(chip->client, 0x11, 0xff);
+        __da903x_write(chip->client, 0x12, 0xff);
+
+        /* Enable the ONKEY power down functionality */
+        __da903x_write(chip->client, DA9034_SYS_CTRL_B, 0x20);
+        __da903x_write(chip->client, DA9034_SYS_CTRL_A, 0x60);
+
+        /* workaround to make LEDs work */
+        __da903x_write(chip->client, 0x90, 0x01);
+        __da903x_write(chip->client, 0xB0, 0x08);
+
+        /* make ADTV1 and SDTV1 effective */
+        __da903x_write(chip->client, 0x20, 0x00);
+
+        dev_info(chip->dev, "DA9034 (CHIP ID: 0x%02x) detected\n", chip_id);
+        return 0;
+}
+
+static int da9034_unmask_events(struct da903x_chip *chip, unsigned int events)
+{
+        uint8_t v[4];
+
+        chip->events_mask &= ~events;
+
+        v[0] = (chip->events_mask & 0xff);
+        v[1] = (chip->events_mask >> 8) & 0xff;
+        v[2] = (chip->events_mask >> 16) & 0xff;
+        v[3] = (chip->events_mask >> 24) & 0xff;
+
+        return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
+}
+
+static int da9034_mask_events(struct da903x_chip *chip, unsigned int events)
+{
+        uint8_t v[4];
+
+        chip->events_mask |= events;
+
+        v[0] = (chip->events_mask & 0xff);
+        v[1] = (chip->events_mask >> 8) & 0xff;
+        v[2] = (chip->events_mask >> 16) & 0xff;
+        v[3] = (chip->events_mask >> 24) & 0xff;
+
+        return __da903x_writes(chip->client, DA9034_IRQ_MASK_A, 4, v);
+}
+
+static int da9034_read_events(struct da903x_chip *chip, unsigned int *events)
+{
+        uint8_t v[4] = {0, 0, 0, 0};
+        int ret;
+
+        ret = __da903x_reads(chip->client, DA9034_EVENT_A, 4, v);
+        if (ret < 0)
+                return ret;
+
+        *events = (v[3] << 24) | (v[2] << 16) | (v[1] << 8) | v[0];
+        return 0;
+}
+
+static int da9034_read_status(struct da903x_chip *chip, unsigned int *status)
+{
+        uint8_t v[2] = {0, 0};
+        int ret = 0;
+
+        ret = __da903x_reads(chip->client, DA9034_STATUS_A, 2, v);
+        if (ret)
+                return ret;
+
+        *status = (v[1] << 8) | v[0];
+        return 0;
+}
+
+static void da903x_irq_work(struct work_struct *work)
+{
+        struct da903x_chip *chip =
+                container_of(work, struct da903x_chip, irq_work);
+        unsigned int events = 0;
+
+        while (1) {
+                if (chip->ops->read_events(chip, &events))
+                        break;
+
+                events &= ~chip->events_mask;
+                if (events == 0)
+                        break;
+
+                blocking_notifier_call_chain(
+                                &chip->notifier_list, events, NULL);
+        }
+        enable_irq(chip->client->irq);
+}
+
+static int da903x_irq_handler(int irq, void *data)
+{
+        struct da903x_chip *chip = data;
+
+        disable_irq_nosync(irq);
+        (void)schedule_work(&chip->irq_work);
+
+        return IRQ_HANDLED;
+}
+
+static struct da903x_chip_ops da903x_ops[] = {
+        [0] = {
+                .init_chip      = da9030_init_chip,
+                .unmask_events  = da9030_unmask_events,
+                .mask_events    = da9030_mask_events,
+                .read_events    = da9030_read_events,
+                .read_status    = da9030_read_status,
+        },
+        [1] = {
+                .init_chip      = da9034_init_chip,
+                .unmask_events  = da9034_unmask_events,
+                .mask_events    = da9034_mask_events,
+                .read_events    = da9034_read_events,
+                .read_status    = da9034_read_status,
+        }
+};
+
+static const struct i2c_device_id da903x_id_table[] = {
+        { "da9030", 0 },
+        { "da9034", 1 },
+        { },
+};
+MODULE_DEVICE_TABLE(i2c, da903x_id_table);
+
+static int __devexit __remove_subdev(struct device *dev, void *unused)
+{
+        platform_device_unregister(to_platform_device(dev));
+        return 0;
+}
+
+static int __devexit da903x_remove_subdevs(struct da903x_chip *chip)
+{
+        return device_for_each_child(chip->dev, NULL, __remove_subdev);
+}
+
+static int __devinit da903x_add_subdevs(struct da903x_chip *chip,
+                                        struct da903x_platform_data *pdata)
+{
+        struct da903x_subdev_info *subdev;
+        struct platform_device *pdev;
+        int i, ret = 0;
+
+        for (i = 0; i < pdata->num_subdevs; i++) {
+                subdev = &pdata->subdevs[i];
+
+                pdev = platform_device_alloc(subdev->name, subdev->id);
+
+                pdev->dev.parent = chip->dev;
+                pdev->dev.platform_data = subdev->platform_data;
+
+                ret = platform_device_add(pdev);
+                if (ret)
+                        goto failed;
+        }
+        return 0;
+
+failed:
+        da903x_remove_subdevs(chip);
+        return ret;
+}
+
+static int __devinit da903x_probe(struct i2c_client *client,
+                                  const struct i2c_device_id *id)
+{
+        struct da903x_platform_data *pdata = client->dev.platform_data;
+        struct da903x_chip *chip;
+        unsigned int tmp;
+        int ret;
+
+        chip = kzalloc(sizeof(struct da903x_chip), GFP_KERNEL);
+        if (chip == NULL)
+                return -ENOMEM;
+
+        chip->client = client;
+        chip->dev = &client->dev;
+        chip->ops = &da903x_ops[id->driver_data];
+
+        mutex_init(&chip->lock);
+        INIT_WORK(&chip->irq_work, da903x_irq_work);
+        BLOCKING_INIT_NOTIFIER_HEAD(&chip->notifier_list);
+
+        i2c_set_clientdata(client, chip);
+
+        ret = chip->ops->init_chip(chip);
+        if (ret)
+                goto out_free_chip;
+
+        /* mask and clear all IRQs */
+        chip->events_mask = 0xffffffff;
+        chip->ops->mask_events(chip, chip->events_mask);
+        chip->ops->read_events(chip, &tmp);
+
+        ret = request_irq(client->irq, da903x_irq_handler,
+                        IRQF_DISABLED | IRQF_TRIGGER_FALLING,
+                        "da903x", chip);
+        if (ret) {
+                dev_err(&client->dev, "failed to request irq %d\n",
+                                client->irq);
+                goto out_free_chip;
+        }
+
+        ret = da903x_add_subdevs(chip, pdata);
+        if (ret)
+                goto out_free_irq;
+
+        return 0;
+
+out_free_irq:
+        free_irq(client->irq, chip);
+out_free_chip:
+        i2c_set_clientdata(client, NULL);
+        kfree(chip);
+        return ret;
+}
+
+static int __devexit da903x_remove(struct i2c_client *client)
+{
+        struct da903x_chip *chip = i2c_get_clientdata(client);
+
+        da903x_remove_subdevs(chip);
+        kfree(chip);
+        return 0;
+}
+
+static struct i2c_driver da903x_driver = {
+        .driver = {
+                .name   = "da903x",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = da903x_probe,
+        .remove         = __devexit_p(da903x_remove),
+        .id_table       = da903x_id_table,
+};
+
+static int __init da903x_init(void)
+{
+        return i2c_add_driver(&da903x_driver);
+}
+module_init(da903x_init);
+
+static void __exit da903x_exit(void)
+{
+        i2c_del_driver(&da903x_driver);
+}
+module_exit(da903x_exit);
+
+MODULE_DESCRIPTION("PMIC Driver for Dialog Semiconductor DA9034");
+MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"
+              "Mike Rapoport <mike@compulab.co.il>");
+MODULE_LICENSE("GPL");