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-rw-r--r--drivers/mfd/da903x.c563
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");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 01:52:19 +0000