| /* |
| * 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> |
| #include <linux/slab.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_writes(struct device *dev, int reg, int len, uint8_t *val) |
| { |
| return __da903x_writes(to_i2c_client(dev), reg, len, val); |
| } |
| EXPORT_SYMBOL_GPL(da903x_writes); |
| |
| 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_reads(struct device *dev, int reg, int len, uint8_t *val) |
| { |
| return __da903x_reads(to_i2c_client(dev), reg, len, val); |
| } |
| EXPORT_SYMBOL_GPL(da903x_reads); |
| |
| 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, ®_val); |
| if (ret) |
| goto out; |
| |
| if ((reg_val & bit_mask) != 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_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, ®_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, ®_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 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 irqreturn_t 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 __remove_subdev(struct device *dev, void *unused) |
| { |
| platform_device_unregister(to_platform_device(dev)); |
| return 0; |
| } |
| |
| static int da903x_remove_subdevs(struct da903x_chip *chip) |
| { |
| return device_for_each_child(chip->dev, NULL, __remove_subdev); |
| } |
| |
| static int 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); |
| if (!pdev) { |
| ret = -ENOMEM; |
| goto failed; |
| } |
| |
| pdev->dev.parent = chip->dev; |
| pdev->dev.platform_data = subdev->platform_data; |
| |
| ret = platform_device_add(pdev); |
| if (ret) { |
| platform_device_put(pdev); |
| goto failed; |
| } |
| } |
| return 0; |
| |
| failed: |
| da903x_remove_subdevs(chip); |
| return ret; |
| } |
| |
| static int 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_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: |
| 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); |
| free_irq(client->irq, chip); |
| kfree(chip); |
| return 0; |
| } |
| |
| static struct i2c_driver da903x_driver = { |
| .driver = { |
| .name = "da903x", |
| .owner = THIS_MODULE, |
| }, |
| .probe = da903x_probe, |
| .remove = da903x_remove, |
| .id_table = da903x_id_table, |
| }; |
| |
| static int __init da903x_init(void) |
| { |
| return i2c_add_driver(&da903x_driver); |
| } |
| subsys_initcall(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"); |